Patent Publication Number: US-2021194267-A1

Title: Charger and control method thereof

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority under 35 U.S.C. § 119 to Korean Application No. 10-2019-0172210 filed on Dec. 20, 2019, whose entire disclosure is hereby incorporated by reference. 
     BACKGROUND 
     1. Field 
     The present disclosure relates to a charger and a control method thereof, and more particularly, to a charger and a control method for intelligently charging a battery attached to a cleaner. 
     2. Background 
     In general, cleaners are home appliances that suck small garbage or dust in a manner of sucking air using electricity and fill it in dust bins in products, and are generally called vacuum cleaners. Such a cleaner may be classified into a manual cleaner for performing cleaning while the user directly moves the cleaner, and an automatic cleaner for performing cleaning while driving by itself. The manual cleaner may be classified into a canister vacuum cleaner, an upright vacuum cleaner, a hand vacuum cleaner, and a stick vacuum cleaner or the like depending on the type of the cleaner. 
     In the household cleaners, the canister vacuum cleaner was used a lot in the past, but recently, the hand vacuum cleaner and the stick vacuum cleaner, which improve the convenience of use by providing a dust box and a cleaner body integrally, have been used a lot. The canister vacuum cleaner has a main body and a suction port connected by a rubber hose or a pipe and, in some cases, can be used with a brush attached to the suction port. 
     The hand vacuum cleaner maximizes portability, and it is light in weight but short in length, so there may be limitations in sitting area for cleaning. Therefore, it is used to clean local places such as on a desk or sofa or in a car. 
     The stick vacuum cleaner can be used with standing and can be used without bowing. Therefore, it is advantageous for cleaning while moving in a large area. If the hand vacuum cleaner cleans a small area, the stick vacuum cleaner can clean a wider area and a high place out of reach. Recently, the stick vacuum cleaner is provided as a modular type, and it is also used to actively change the cleaner type for various objects. In addition, recently, the hand vacuum cleaner and the stick vacuum cleaner are provided to be used in combination, and products that improve user convenience have been released. 
     On the other hand, the hand/stick vacuum cleaner may have a detachable rechargeable battery. While not using the vacuum cleaner, the user may charge the battery built in the vacuum cleaner by placing the vacuum cleaner on a charger connected to a power outlet. 
     On the other hand, temperature of the battery greatly affects performance and safety of the battery. For this reason, the battery of the vacuum cleaner is marked with available temperature. In other words, if the battery is used above the allowable temperature marked on the battery, the user&#39;s safety may be threatened. 
     Further, discharge allowable temperature and charge allowable temperature are different in specifications for each battery. On the other hand, a discharge allowable temperature range is wider than a charge allowable temperature range. Here, when discharging to the maximum value of the discharge allowable temperature range of the battery, it will be outside the charge allowable temperature range. Accordingly, the user must wait for charging until the temperature of the battery drops to the charge allowable temperature range, and the time required for charging is unnecessarily increased. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The embodiments will be described in detail with reference to the following drawings in which like reference numerals refer to like elements wherein: 
         FIG. 1  is a view illustrating a configuration for control of a vacuum cleaner according to an embodiment of the present disclosure. 
         FIG. 2  is a control block diagram of each component constituting a control system of a vacuum cleaner and a smart device. 
         FIG. 3  illustrates a customized cleaning information providing apparatus according to an embodiment of the present disclosure. 
         FIG. 4  is a black diagram illustrating an example of a processor of  FIG. 3 . 
         FIG. 5  is an exploded perspective view illustrating a vacuum cleaner according to an embodiment. 
         FIG. 6  is a diagram illustrating a control method of a vacuum cleaner according to an embodiment. 
         FIG. 7  is a block diagram illustrating a connection relationship of a vacuum cleaner. 
         FIG. 8  is a cross-sectional view illustrating a coupling part of a cleaner body and a cleaning module according to a first embodiment. 
         FIG. 9  is a plan view illustrating coupling parts of a cleaner body and a cleaning module according to a first embodiment, respectively. 
         FIG. 10  is a plan view illustrating a coupling part of a cleaner body and a cleaning module according to a second embodiment, respectively. 
         FIG. 11  is a flowchart illustrating a control method of a charger according to an embodiment of the present disclosure. 
         FIG. 12  is a block diagram illustrating a charger and a battery according to an embodiment of the present disclosure. 
         FIG. 13  is a diagram illustrating a battery and a charger of  FIG. 12  in terms of signal processing. 
         FIG. 14  illustrates a temperature distribution according to an embodiment of the present disclosure. 
         FIG. 15  is a graph illustrating a change in temperature with a change in time. 
         FIG. 16  illustrates one example of a pulse wave according to an embodiment of the present disclosure. 
         FIG. 17  illustrates another example of a pulse wave according to an embodiment of the present disclosure. 
         FIG. 18  illustrates another example of a pulse wave according to an embodiment of the present disclosure. 
         FIG. 19  illustrates another example of a pulse wave according to an embodiment of the present disclosure. 
         FIG. 20  illustrates the other example of a pulse wave according to an embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment disclosed in the present disclosure, however, the same or similar components regardless of the reference numerals are given the same reference numerals and redundant description thereof will be omitted. In describing the embodiments disclosed in the present disclosure, when a component is referred to as being “coupled” or “connected” to another component, it may be directly coupled to or connected to the other component, however, it should be understood that other components may exist in the middle. 
     In addition, in describing the embodiments disclosed in the present disclosure, when it is determined that the detailed description of the related known technology may obscure the gist of the embodiments disclosed in the present disclosure, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easily understanding of the embodiments disclosed in the present disclosure, but the technical spirit disclosed in the present disclosure is not limited by the accompanying drawings, and it should be understood that the accompanying drawings include all changes, equivalents, and substitutes included in the spirit and scope of the present disclosure. On the other hand, the term “disclosure” may be replaced with terms such as document, specification, description. 
       FIG. 1  is a view illustrating a configuration for control of a vacuum cleaner  100  according to an embodiment of the present disclosure, and  FIG. 2  is a control block diagram of each component constituting a control system of a vacuum cleaner  100  and a smart device  20 . Referring to  FIG. 1 , a control system of a vacuum cleaner  100  according to an embodiment of the present disclosure may include a vacuum cleaner  100 , a smart device  20  equipped with an application (APP) for controlling or managing the vacuum cleaner  100 , a server  30  for managing the application  30 , and the internet  40  for communication among the smart device  20 , the vacuum cleaner  100 , and the server  30 . 
     Referring to  FIG. 2 , the vacuum cleaner  100  may include a processor (or controller)  101 , an input unit  102 , an output unit  103 , a sensing unit (or sensor)  104 , a memory  105 , a communication module  106 , and a power supply  107 . The processor  101  may include a controller. For example, it may include a micro controller unit (MCU). 
     The input unit  102  may be formed in a control panel provided near a handle of the vacuum cleaner  100 , and may be provided in the form of a touch button or a push button. Alternatively, the input unit  102  may be provided in a microphone form to recognize a voice command. In addition, an input unit including a camera or an image sensor may be provided to recognize a gesture of a user. 
     The output unit  103  may include a display provided as an image output unit and a speaker provided as a sound output unit. The display may be provided in the control panel or provided as a separate display area, and may include an LCD panel on which an image or a video is output. Alternatively, the display may simply include a singular light emitting unit or a plurality of light emitting units. The speaker may output a selection sound, a warning sound, a cleaning start or cleaning completion notification signal, and the like. In addition, the speaker may be provided in an area other than the handle that can be grabbed by the user. 
     The sensing unit  104  may include a current sensor for detecting a current value (or voltage value) of a driver to be described later, a load sensor for detecting a load of the driver, a torque sensor for detecting a torque of the driver, and a timer for detecting an operation hour and time. The memory  105  may include DRAM (RAM that requires refreshing), SRAM (RAM that does not require refreshing), ROM, EPROM, EEPROM, and the like. 
     In addition, the communication module  106  may include a wired communication module including a power line communication (PLC) capable of the internet communication or a wireless communication module including Wi-Fi. The communication module  106  may include a transceiver or an antenna. The transceiver may include a transmitter and a receiver. 
     In addition, the vacuum cleaner  100  may further include a power supply  107  and the driver for operating the vacuum cleaner  100 . The driver may include a driving motor or a motor pump. The driving motor may include a main driving motor that is installed in a cleaner body to generate a suction force and an auxiliary driving motor that is installed in a suction nozzle provided at a suction end of the vacuum cleaner to generate a rotational force of a roller and the like. 
     On the other hand, the smart device  20  may include, for example, a smart phone that the user can carry or other computing device. The smart device  20  may include a processor  21 , an input unit  22 , a memory  23 , a power supply  24 , a wireless communication unit  25 , a sound output unit  26 , and a display  27 . The input unit  22  may include a touch type button for inputting a command by touching the display  27 . In addition, the wireless communication unit  25  may be a wireless communication module capable of communicating with the internet  40 . In addition, the sound output unit  26  may include a speaker. 
     According to the above configuration, the user may execute the application (APP) for managing or controlling the vacuum cleaner  100  installed in the smart device  20 , and may check a management state of the vacuum cleaner  100  or input a control command through this application. In addition, the user may receive information related to the management state of the vacuum cleaner  100  stored in the server  30  through the internet  40  to the smart device  20 . The control command input to the smart device  20  is transmitted to the server  30  of the application through the internet  40 , and the server  30  may transmit a control command to the communication module  106  of the vacuum cleaner  100  through the internet  40 . 
     In addition, the control command received through the communication module  106  is received to the processor  101  of the vacuum cleaner  100 , and the processor  101  may control the operation of the driver according to the received control command. In addition, the processor  101  of the vacuum cleaner  100  may transmit an event occurring in the cleaning process and being received from the sensing unit  104  via wire or wireless through the communication module  106 . The event information transmitted through the communication module  106  of the vacuum cleaner  100  may be transmitted to the server  30  through the internet  40 . In addition, the server  30  may transmit the received event information to the wireless communication unit  25  of the smart device  20  through the internet  40 . In addition, the event information received by the wireless communication unit  25  may be displayed on the display  27  by the processor  21  of the smart device  20 . 
       FIG. 3  illustrates a customized cleaning information providing apparatus (or vacuum cleaner)  100  according to an embodiment of the present disclosure. Referring to  FIG. 3 , the customized cleaning information providing apparatus  100  may include a processor  101 , an input unit  102 , an output unit  103 , a sensing unit  104 , a memory  105 , a communication module  106 , and/or a power supply  107 . 
     The processor  101  may include a controller. For example, it may include a micro controller unit (MCU). The input unit  102  may include a physical button or a touch button that receives a physical signal or a touch signal from outside and a microphone that receives an audio signal based on the control of the processor  101 . In addition, the input unit  102  may include a camera or an image sensor that receives an image from outside based on the control of the processor  101 . 
     The output unit  103  may include a speaker that outputs an audio signal based on the control of the processor  101 . For example, the speaker may provide the customized cleaning information in a form of the audio signal. The output unit  103  may include a display for outputting visual information based on the control of the processor  101 . The display may implement a touch screen by forming a layer structure or integrally with the touch sensor. The touch screen may function as a user input unit that provides an input interface between the customized cleaning information providing apparatus  100  and the user, at the same time, and may provide an output interface between the customized cleaning information providing apparatus  100  and the user. For example, the display may obtain information for user registration from the user. In addition, the display may output the customized cleaning information to the user in the form of visual information. That is, the display may be the input interface of the customized cleaning information providing apparatus  100  and, at the same time, may be the output interface of the customized cleaning information providing apparatus  100 . 
     The sensing unit  104  may include sensors for sensing information of any one or more of a current, a voltage, a load, and a torque of the driver of the customized cleaning information providing apparatus  100 . In addition, the sensing unit  104  may include a timer capable of knowing an operating hour and an operating time of the driver. In addition, the sensing unit  104  may include a camera or an image sensor to detect the user or an obstacle. 
     The memory  105  stores data that supports various functions of the customized cleaning information providing apparatus  100 . The memory  105  may store a plurality of application programs or applications driven in the customized cleaning information providing apparatus  100 , data and instructions for operating the customized cleaning information providing apparatus  100 . At least some of these applications may be downloaded from an external server through wireless communication. In addition, at least some of these application programs may exist on the customized cleaning information providing apparatus  100  from the time of shipment for basic functions (e.g. functions of receiving and transmitting data) of the customized cleaning information providing apparatus  100 . On the other hand, the application program may be stored in the memory  105 , installed on the customized cleaning information providing apparatus  100 , so that the application program may be driven by the processor  101  to perform an operation (or function) of the customized cleaning information providing apparatus  100 . 
     The communication module  106  may include one or more modules that enable wireless communication between the customized cleaning information providing apparatus  100  and the wireless communication system, between the customized cleaning information providing apparatus  100  and other customized cleaning information providing apparatus, or between the customized cleaning information providing apparatus  100  and the external server. In addition, the communication module  106  may include one or more modules for connecting the customized cleaning information providing apparatus  100  to one or more networks. Here, the communication module  106  may be connected to the 5G communication system. The communication module  106  may perform wireless communication with other customized cleaning information providing apparatus, an external server or an external apparatus (e.g. a mobile terminal) through the 5G communication system. The communication module  106  may include at least one of a short range communication unit and a wireless internet unit. 
     The wireless internet unit refers to a module for wireless internet access, and may be built in or external to the customized cleaning information providing apparatus  100 . The wireless internet unit is configured to transmit and receive wireless signals in a communication network based on wireless internet technologies. 
     The wireless internet technologies include, for example, WLAN (Wireless LAN), Wi-Fi (Wireless-Fidelity), Wi-Fi (Wireless Fidelity) Direct, DLNA (Digital Living Network Alliance), WiBro (Wireless Broadband), WiMAX (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access), HSUPA (High Speed Uplink Packet Access), LTE (Long Term Evolution), LTE-A (Long Term Evolution-Advanced), etc., and the wireless internet unit transmits and receives data based on at least one wireless internet technology in a range including internet technologies not listed above. 
     If the wireless internet access by WiBro, HSDPA, HSUPA, GSM, CDMA, WCDMA, LTE, LTE-A, etc. is made through a mobile communication network, the wireless internet unit for performing wireless internet access through the mobile communication network may be understood as a kind of the mobile communication module. 
     The short range communication unit is for short range communication, and the short range communication unit may support the short range communication using at least one of Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, Near Field Communication (NFC), Wireless-Fidelity (Wi-Fi), Wi-Fi Direct, and Wireless Universal Serial Bus (Wireless USB) technology. Such a short range communication unit may support wireless communication between the customized cleaning information providing apparatus  100  and the wireless communication system, between the customized cleaning information providing apparatus  100  and other customized cleaning information providing apparatus, or between the customized cleaning information providing apparatus  100  and a network in which another mobile terminal (or an external server) is located through wireless area networks. The short range wireless communication networks may be short range wireless personal area networks. 
     Here, the other customized cleaning information providing apparatus may be an apparatus capable of exchanging (or interlocking) data with the customized cleaning information providing apparatus  100  according to the present disclosure. The short range communication unit, around the customized cleaning information providing apparatus  100 , may detect (or recognize) other customized cleaning information providing apparatus that can communicate with the customized cleaning information providing apparatus  100 . Furthermore, when the detected other customized cleaning information providing apparatus is a customized cleaning information providing apparatus certified to communicate with the customized cleaning information providing apparatus  100  according to the present disclosure, the processor  101  may transmit at least a part of data processed by the customized cleaning information providing apparatus  100  to the other customized cleaning information providing apparatus through the short range communication unit. Therefore, the user of the other customized cleaning information providing apparatus may use data processed by the customized cleaning information providing apparatus  100  through the other customized cleaning information providing apparatus. For example, according to this, the user can receive cleaning information from the customized cleaning information providing apparatus  100 , and output the cleaning information through a display of the other customized cleaning information providing apparatus  100 . 
     The power supply  107  receives power from an external power source and an internal power source under the control of the processor  101  to supply power to each component included in the customized cleaning information providing apparatus  100 . The power supply  107  includes a battery, which may be a built-in battery or a replaceable battery. 
     According to an embodiment of the present disclosure, the processor  101  may control the input unit  102 , the output unit  103 , the sensing unit  104 , the memory  105 , the communication module  106 , and the power supply  107 . According to an embodiment of the present disclosure, the processor  101  may control the input unit  102  and the output unit  103  to provide customized cleaning information. 
     According to an embodiment of the present disclosure, the processor  101  may control the sensing unit  104  to obtain information necessary for the customized cleaning information providing apparatus  100 . For example, the processor  101  may obtain current/voltage values, load values, torque values, operating hour and operating time information, user recognition information, and/or obstacle detection information from the sensing unit  104 . 
     According to an embodiment of the present disclosure, the processor  101  may obtain a plurality of user&#39;s face images stored in the memory  105 , and may generate/learn a face classification model for classifying a user&#39;s face by using (meta learning) only a predetermined number of images among the plurality of user&#39;s face images. In addition, the processor  101  may obtain images of a plurality of food items stored in the memory  105 , and may generate/learn a food classification model for classifying food using only a predetermined number of images among the plurality of food images. 
     According to an embodiment of the present disclosure, the processor  101  may control the communication module  106  to transmit the customized cleaning information to an external mobile terminal. Detailed description of the function/operation of the processor  101  will be described in detail later. 
       FIG. 4  is a black diagram illustrating an example of a processor  101  of  FIG. 3 . As shown in  FIG. 4 , a processor of  FIG. 4  may be an AI device  50 , but is not necessarily limited thereto. The AI device  50  may include an electronic device including an AI module capable of performing AI processing or a server including the AI module. In addition, the AI device  50  may be included in at least a part of the customized cleaning information providing apparatus  100  illustrated in  FIG. 3  and may be provided to perform at least some of the AI processing together. 
     The AI processing may include all operations related to the control of the customized cleaning information providing apparatus  100  shown in  FIG. 3 . For example, the customized cleaning information providing apparatus  100  may perform processing/determination and control signal generation by performing the AI processing of the sensing data or the obtained data. In addition, for example, the customized cleaning information providing apparatus  100  may control an intelligent electronic device by performing the AI processing of the data received through the communication unit. 
     The AI device  50  may be a client device that directly uses an AI processing result, or a device of a cloud environment that provides the AI processing result to another device. The AI device  50  may include an AI processor  51 , a memory  55 , and/or a communication unit  57 . The AI device  50  is a computing device capable of learning neural networks, and may be implemented as various electronic devices such as a server, a desktop PC, a notebook PC, a tablet PC, and the like. 
     The AI processor  51  may learn a neural network using a program stored in the memory  55 . In particular, the AI processor  51  may learn a neural network for recognizing vehicle-related data. Here, the neural network for recognizing vehicle-related data may be designed to simulate a human brain structure on a computer, and may include a plurality of network nodes having weights, which simulate the neurons of a human neural network. A plurality of network modes may transmit and receive data according to each connection relationship so that neurons simulate the synaptic activity of neurons that transmit and receive signals through synapses. Here, the neural network may include a deep learning model developed from the neural network model. In the deep learning model, the plurality of network nodes may be located at different layers and transmit and receive data according to a convolutional connection relationship. Examples of the neural network models may include various deep learning techniques, such as deep neural networks (DNNs), convolutional deep neural networks (CNNs), recurrent boltzmann machines (RNNs), restricted boltzmann machines (RBMs), and deep belief networks (DBN), and Deep Q-Network, and may be applied to fields such as computer vision, speech recognition, natural language processing, speech/signal processing, and the like. On the other hand, the processor that performs the function described above may be a general purpose processor (e.g. CPU), but may be an AI dedicated processor (e.g. GPU) for artificial intelligence learning. 
     The memory  55  may store various programs and data necessary for the operation of the AI device  50 . The memory  55  may be implemented as a nonvolatile memory, a volatile memory, a flash-memory, a hard disk drive (HDD), or a solid state drive (SDD), etc. The memory  55  may be accessed by the AI processor  51 , and may read/write/modify/delete/update the data by the AI processor  51 . In addition, the memory  55  may store a neural network model (e.g. deep learning model  56 ) generated through a learning algorithm for data classifying/recognizing according to an embodiment of the present disclosure. 
     On the other hand, the AI processor  51  may include a data learning unit  52  for learning the neural network for the data classification/recognition. The data learning unit  52  may learn a criterion about what learning data to use to determine the data classification/recognition and how to classify and recognize the data using the learning data. The data learning unit  52  may learn the deep learning model by obtaining the learning data to be used for learning and applying the obtained learning data to the deep learning model. 
     The data learning unit (or data learning processor)  52  may be manufactured in a form of at least one hardware chip and mounted on the AI device  50 . For example, the data learning unit  52  may be manufactured in a form of a dedicated hardware chip for artificial intelligence (AI), or may be manufactured as a part of a general purpose processor (CPU) or a graphics dedicated processor (GPU) and mounted on the AI device  50 . In addition, the data learning unit  52  may be implemented as a software module. When implemented as a software module (or a program module including instructions), the software module may be stored in a computer readable non-transitory computer readable recording media. In this case, at least one software module may be provided by an operating system (OS) or by an application. 
     The data learning unit  52  may include or may be coupled to a learning data obtaining unit (or data obtaining processor)  53  and a model learning unit (or model learning processor)  54 . The learning data obtaining unit  53  may obtain learning data useful for a neural network model for classifying and recognizing data. For example, the learning data obtaining unit  53  may obtain vehicle data and/or sample data for input to the neural network model as the learning data. 
     The model learning unit  54  may learn to have a criterion about how the neural network model classifies predetermined data using the obtained learning data. In this case, the model learning unit  54  may learn the neural network model through supervised learning that uses at least some of the learning data as a criterion. Alternatively, the model learning unit  54  may learn the neural network model through unsupervised learning that finds a criterion by self-learning using the learning data without guidance. In addition, the model learning unit  54  may learn the neural network model through reinforcement learning using feedback on whether the result of the situation determination according to the learning is correct. In addition, the model learning unit  54  may learn the neural network model using learning algorithms that include error back-propagation or gradient decent. 
     When the neural network model is learned, the model learning unit  54  may store the neural network model in the memory. The model learning unit  54  may store the learned neural network model in the memory of the server connected to the AI device  50  through a wired or wireless network. 
     The data learning unit  52  may further include a learning data preprocessor (not shown) and a learning data selector (not shown) in order to improve analysis results of a recognition model, or to save resources or time required for generating the recognition model. The learning data preprocessor may preprocess the obtained data so that the obtained data may be used for learning for situation determination. For example, the learning data preprocessor may process the obtained data in a preset format so that the model learning unit  54  may use the obtained learning data for learning for image recognition. 
     In addition, the learning data selector may select data necessary for learning among the learning data obtained by the learning data obtaining unit  53  or the learning data preprocessed by the preprocessor. The selected learning data may be provided to the model learning unit  54 . For example, the learning data selector may select only data for an object included in a specific area as learning data by detecting a specific area of an image obtained through a camera of the intelligent electronic device. 
     In addition, the data learning unit  52  may further include a model evaluator (not shown) to improve analysis results of the neural network model. The model evaluator may input the evaluation data into the neural network model, and when the analysis result output from the evaluation data does not satisfy a predetermined criterion, may allow the model learning unit  54  to learn again. In this case, the evaluation data may be predefined data for evaluating the recognition model. For example, among the analysis results of the learned recognition model on the evaluation data, when the number or ratio of evaluation data that is not accurate in analysis results exceeds a preset threshold, the model evaluator may evaluate that a predetermined criterion is not satisfied. 
     The communication unit  57  may transmit the AI processing result by the AI processor  51  to an external electronic device. The external electronic device may include an autonomous vehicle, a robot, a drone, an AR device, a mobile device, a home appliance, and the like. 
     For example, when the external electronic device is the autonomous vehicle, the AI device  50  may be defined as another vehicle or 5G network that communicates with the autonomous module vehicle. On the other hand, the AI device  50  may be implemented by being functionally embedded in the autonomous module provided in the vehicle. In addition, the 5G network may include a server or a module that performs autonomous related control. 
     On the other hand, the AI device  50  illustrated in  FIG. 4  has been described to functionally be divided into the AI processor  51 , the memory  55 , the communication unit  57 , and the like, but it should be noted that the above-described components may be integrated into one module and may be referred to as AI modules. 
       FIG. 5  is an exploded perspective view illustrating a vacuum cleaner  100  according to an embodiment. Referring to  FIG. 5 , a vacuum cleaner  100  may include a cleaner body  200 , a cleaning module  210  coupled to the cleaner body  200 , a length adjusting member  220  for connecting the cleaner body  200  and the cleaning module  210 , a battery  400  coupled to the cleaner body  200 , and a cleaner holder  300  on which the cleaner body  200  is mounted. 
     The cleaner body  200  may include a body part (or body housing)  201  in which a suction motor (not shown) for generating a suction force and a cyclone assembly (not shown) for separating dust from the sucked air are installed, a handle part (or handle)  202  connected to the back of the body part  201  and grabbed by the user, a connecting part (or connector)  203  connected to the front of the body part  201  and coupled to the cleaning module  210  or the length adjusting member (or extension tube)  220 . The cleaning module (or suction head)  210  may include a suction part (or suction port)  211  that sucks dust and the like, and a coupling part (or coupling port)  212  coupled to the cleaner body  200  or the length adjusting member  220 . 
     One end of the length adjusting member  220  may be coupled to the cleaner body  200 , and the other end of the length adjusting member  220  may be coupled to the cleaning module  210 . The length adjusting member  220  may employ a structure in which the length is variable. The length adjusting member  220  may employ a material that can be elastically changed. The one end of the length adjusting member  220  may be coupled to the cleaner body  200 , and a suction part (not shown) is provided at the other end so that a suction function can be performed without coupling of a separate cleaning module. 
     The battery  400  may be detachably connected to the body part  201  or other component of the cleaner body  200  to supply power for driving the vacuum cleaner  100 . The battery  400  may be detachably connected to a battery accommodating part (or battery accommodating housing)  302  of the cleaner holder  300  to be rechargeable. Two batteries  400  may be provided, one is coupled to the cleaner body  200  to supply power, and the other is coupled to the cleaner holder  300  to be charged. 
     The cleaner holder  300  may include a stand-type or wall-type body  301 , a battery accommodating part  302  in which the battery  400  is charged, a cleaner support part (or cleaner support extensions)  303  which supports the cleaner body  200 , a charging part (or charging contact)  304  electrically connected to the battery  400  coupled to the cleaner body  200 . AIthough the drawing shows the wall-type body  301 , it may alternatively include the stand-type body (not shown) provided in a standing state on the floor. 
     The battery  400  may be electrically connected to the charging part  304  while the cleaner body  200  is supported by the cleaner support part  303 . Therefore, the user may charge the battery  400  while placing the cleaner body  200  on the cleaner holder  300 . 
     The cleaner holder  300  may be electrically connected to an external outlet  311  through a power line  310 . A current transmitted through the power line  310  may charge a first battery accommodated in the cleaner body  200  through the charging part  304  of the cleaner holder, and charge a second battery mounted on the battery accommodating part  302 . 
     In addition, in the vacuum cleaner  100 , the suction part performing various functions may be modularly mounted on the cleaner body  200 . That is, the cleaning module  210  is provided with a plurality of functions, and the user may use the cleaning module  210  suitable for the cleaning object in combination with the cleaner body  200 . 
     The cleaning module  210  may include a cleaning module having a basic wood floor suction port, a cleaning module having a bedding suction port, a cleaning module having a mattress suction port, a cleaning module having a carpet suction port, and a cleaning module having a mop, etc. In addition, a dedicated cleaning module for performing various functions, such as for hard dust, bending gaps, upper cleaning may be provided as a module. 
     The drawing shows that a cleaning module  221  having a  2 in 1  suction port and a cleaning module  222  having a suction hole for gaps are mounted on the cleaner holder  300 . The cleaning module  221  having the  2 in 1  suction port may be used as a basic type when cleaning a sofa or a mattress and as a brush type when cleaning a frame or furniture by adjusting the length of the brush by button operation. In addition, the cleaning module  222  having the suction hole for gaps may have an inlet formed in a narrow nozzle shape to be advantageous for sucking dust and the like by inserting in a narrow gap. 
       FIG. 6  is a diagram illustrating a control method of a vacuum cleaner  100  according to an embodiment. The vacuum cleaner  100  according to an embodiment of the present disclosure may be provided with a modular cleaning module  210  that is detachable, and may be used while changing an appropriate cleaning module  210  as necessary. 
     The cleaner body  200  may receive information and load information of the cleaning module used from the cleaning module  210 . For example, a main circuit (MCU: Micro Controller Unit) provided in the cleaner body  200  may determine and store what is the cleaning module  210  currently being used through the current value (or voltage value) measured at the power line connected to the cleaning module  210 . 
     Since the current value of the power line may vary depending on the load applied to the cleaning module  210 , the main circuit may also store and use the load information or torque information applied to the cleaning module  210 . For reference, the torque of the motor is proportional to the load current flowing through the rotor. As the load of the motor increases, the load current increases, and the torque increases to balance with the load so that stable operation can be continued. The relationship between the torque and the load current can be known through a torque characteristic curve. 
     In addition, the main circuit may store information regarding which cleaning module  210  was used at what time and for what time, that is, usage time information. When the usage mode may be determined into strong/medium/weak according to the rotational force of the suction motor of the cleaner body  200 , the main circuit can store the usage time and usage output for each usage mode used by the user. The main circuit may transmit accumulated usage time and usage frequency information for each cleaning module used by the user to the server  30  together with the information. 
     The server  30  may provide cleaning history information to the user by using the accumulated information. In addition, the server  30  may inform that the cleaning time has arrived by analyzing a cleaning pattern of the user and recommending a cleaning type necessary for the smart device  20  or the vacuum cleaner  100 . For example, when analyzing through the accumulated data of the vacuum cleaner  100 , if the last of the bedding cleaning has been passed two months, the application of the smart device  20  may inform the user that it is time to proceed with the bedding cleaning. In addition, the server  30  may inform that the washing time of the cleaning module  210  component has arrived, or may inform that the cleaning module  210  has failed or the replacement time has elapsed. 
       FIG. 7  is a block diagram illustrating a connection relationship of a vacuum cleaner  100 . Referring to  FIG. 7  (region a), the cleaning module  210  and the cleaner body  200  may be physically connected through the power line, the cleaner body  200  and the server  30  may be connected by wireless communication, and the server  30  and the smart device  20  may be connected by wireless communication. A coupling part of the cleaning module  210  and the cleaner body  200  may transmit the suction force generated by the cleaner body  200  to the cleaning module  210 , and may be provided with a suction pipe that is a passage for moving the dust sucked from the cleaning module  210 , and a power line for providing power to the cleaning module  210 . The main circuit of the cleaner body  200  can obtain information related to which cleaning module  210  is coupled, whether it is currently in use, and how much load or torque is applied through the current value (or voltage value) of the power line. 
     Referring to  FIG. 7  (region b), the cleaning module  210  and the cleaner body  200  may be physically connected through the power line and wired communication, the cleaner body  200  and the server  30  may be connected by wireless communication, and the server  30  and the smart device  20  may be connected by wireless communication. For example, a coupling part of the cleaning module  210  and the cleaner body  200  may transmit the suction force generated by the cleaner body  200  to the cleaning module  210 , and may be provided with a suction pipe that is a passage for moving the dust sucked from the cleaning module  210 , a power line for providing power to the cleaning module  210 , and a communication line for transmitting usage information of the cleaning module  210 . 
     The main circuit of the cleaner body  200  can obtain information related to which cleaning module  210  is coupled, whether it is currently in use, and how much load or torque is applied through the information of the communication line. The current (or voltage) information of the power line includes noise, and when the noise is relatively large, it may not be possible to identify information to be obtained from them. In this case, by using a separate communication line, only information to be obtained can be transmitted through a separate line. For example, when a bedding cleaning module is used in combination, it may be difficult to obtain usage information through the power line because the operating current is very weak. In this case, a communication line is provided separately from the power line, it is possible to transmit information without missing information by transmitting the usage information of the cleaning module  210  through the communication line. 
     Referring to  FIG. 7  (region c), the cleaning module  210  and the cleaner body  200  may be physically connected through the power line and may be connected through wireless communication, the cleaner body  200  and the server  30  may be connected by wireless communication, and the server  30  and the smart device  20  may be connected by wireless communication. The cleaning module  210  may be provided with a transmitter for wirelessly transmitting the usage information. The cleaner body  200  may be provided with a receiver for receiving information of the cleaning module  210 . In addition, the main circuit of the cleaner body  200  can obtain information related to which cleaning module  210  is coupled, whether it is currently in use, and how much load is applied through the information of the receiver. Zigbee, Bluetooth, or the like may be used as a means of wireless communication that may be used 
       FIG. 8  is a cross-sectional view illustrating a coupling part of a cleaner body  200  and a cleaning module  210  according to a first embodiment, and  FIG. 9  is a plan view illustrating coupling parts of a cleaner body  200  and a cleaning module  210  according to a first embodiment, respectively. The cleaner body  200  may form the connecting part  203  which is connected to the front of the body part  201  and is coupled to the cleaning module  210  or the length adjusting member  220 . The connecting part  203  may be provided in a form of a tube protruding in front of the body part  201 . 
     In addition, one end of the cleaning module  210  or the length adjusting member  220  may be formed with the coupling part  212  coupled to the connecting part  203 . The coupling part  212  may be provided in a tubular shape in which the connecting part  203  may be accommodated. At this time, the inner diameter of the coupling part  212  may be the same or slightly larger than the outer diameter of the connecting part  203 . 
     The connecting part  203  and the coupling part  212  may be detachably coupled. For example, the coupling may be provided by coupling of a coupling groove  203   c  formed to be recessed in an outer circumferential surface of the connecting part  203  and a coupling protrusion  212   c  formed to protrude from an inner circumferential surface of the coupling part  212 . 
     The coupling protrusion  212   c  may be connected to the coupling part  212  by a hinge, and supported by an elastic member such as a coil spring. That is, when the user inserts the connecting part  203  into the inner space of the coupling part  212 , the coupling protrusion  212   c  is pressed while pressing the elastic member, and when the insertion of the connecting part  203  is completed, the coupling protrusion  212   c  is fitted into the coupling groove  203   c  by a restoring force of the elastic member. Therefore, the connecting part  203  and the coupling part  212  can be firmly coupled. 
     At the time of separation, a pusher provided on the outer circumferential surface of the coupling part  212  may be used. When the user presses the pusher, the coupling protrusion  212   c  connected thereto is pressed in a state in which the elastic member is pressed. That is, the coupling protrusion  212   c  may be separated from the coupling groove  203   c  to separate the connecting part  203  from the coupling part  212 . 
     The connecting part  203  may transmit the suction force generated in the cleaner body  200  to the cleaning module  210 , and may be provided with a first suction pipe  203   a  which is a passage through which dust sucked from the cleaning module  210  moves, and a first power connection part  203   b  for providing power to the cleaning module  210 . In addition, the coupling part  212  may be provided with a second suction pipe  212   a  which is a passage through which the suction force of the connecting part  203  is transmitted and a passage through which dust sucked by the cleaning module  210  moves, and a second power connection part  212   b  for receiving power from the first power connection part  203   b.    
     The first and second power connection parts  203   b  and  212   b  may be provided at one side of the first and second suction pipes  203   a  and  212   a,  and be provided in a shape in which two terminals are connected. For example, the second power connection part  212   b  may be provided so that the positive terminal protrudes, and the first power connection part  203   b  may be provided so that the negative terminal is recessed, and the second power connection part  212   b  may be inserted. That is, the suction pipes  203   a  and  212   a  and the power connection parts  203   b  and  212   b  may be simultaneously connected while the connecting part  203  and the coupling part  212  are coupled to each other. 
       FIG. 10  is a plan view illustrating a coupling part of a cleaner body  200  and a cleaning module  210  according to a second embodiment, respectively. The connecting part  203  may be provided with a first suction pipe  203   a  which is a passage through which the suction force generated in the cleaner body  200  is transmitted to the cleaning module  210 , and a passage through which the dust sucked in the cleaning module  210  moves, a first power connection part  203   b  for providing power to the cleaning module  210 , and a first information connection part  203   d  which is connected to a second information connection part  212   d  described below to receive information. 
     The coupling part  212  may be provided with a second suction pipe  212   a  which is a passage through which the suction force of the connecting part  203  is transmitted and dust sucked from the cleaning module  210  moves, a second power connection part  212   b  for receiving power from the first power connection part  203   b,  and a second information connection part  212   d  which transmits the information of the cleaning module  210  to the main circuit of the cleaner body  200 . 
     The first and second power connection parts  203   b  and  212   b  may be provided at one side of the first and second suction pipes  203   a  and  212   a,  and be provided in a shape in which two terminals are connected. For example, the second power connection part  212   b  may be provided so that the positive terminal protrudes, and the first power connection part  203   b  may be provided so that the negative terminal is recessed, and the second power connection part  212   b  may be inserted. 
     In addition, the first and second information connection parts  203   d  and  212   d  may be provided adjacent to the first and second power connection parts  203   b  and  212   b,  and may be provided in a shape to which one terminal is connected. For example, the second information connection part  212   d  may be provided so that one terminal protrudes, and the first information connection part  203   d  may be provided so that the negative terminal is recessed, and the second power connection part  212   d  may be inserted. That is, the suction pipes  203   a  and  212   a,  the power connection parts  203   b  and  212   b,  and the information connection parts  203   d  and  212   d  may be simultaneously connected while the connecting part  203  and the coupling part  212  are coupled to each other. 
     The torque of the motor is proportional to the load current flowing through the rotor. When the load of the motor increases, the load current increases, and the torque increases to balance with the load so that stable operation can be continued. The relationship between the torque and the load current can be known through a torque characteristic curve. 
       FIG. 11  is a flowchart illustrating a control method of a charger according to an embodiment of the present disclosure. As shown in  FIG. 11 , the charger according to the embodiment of the present disclosure may charge a battery detached/attached to a cleaner through steps S 110  and S 130 , and the detailed description is as follows. Here, the charger may include at least a part of the cleaner holder  300  described with reference to  FIG. 5 . Here, the cleaner may include at least some components of the cleaner  100  described with reference to  FIGS. 1 to 10 . 
     First, the charger obtains temperature information from or of the battery attached to the cleaner (S 110 ). Here, the temperature information may include information related to the temperature of the battery itself. Here, the temperature of the battery itself may be detected by a sensor (not shown, described later) included in the battery. When the sensor included in the battery detects the temperature of the battery itself, a processor (not shown, described later) included in the battery may transmit the temperature information to the charger through a communication unit (not shown, described later) included in the battery. Here, the communication unit may transmit the temperature information to the charger through wired communication, but is not necessarily limited thereto, and may use any form of communication medium or methodology for transmitting the temperature information. 
     Subsequently, the charger charges the battery attached to the cleaner based on the temperature information (S 130 ). More specifically, the charger may determine whether the temperature of the battery is measured within a predetermined first section or range of temperature values based on the temperature information of the battery, and when the temperature of the battery is measured within the predetermined first section or range of temperature values, the charger may charge the battery by applying a pulse wave of a first period or duration to the battery. Here, the predetermined first section may mean a section or range of temperatures that is outside a predetermined charge allowable temperature range of the battery and within a predetermined discharge allowable temperature range. 
       FIG. 12  is a block diagram illustrating a charger and a battery according to an embodiment of the present disclosure. As shown in  FIG. 12 , a battery  1210  may include a first communication unit  1211 , a first processor  1212 , a temperature sensor  1213 , a power storage unit  1214 , and/or a switch  1215 . A charger  1220  may include a second communication unit  1221 , a second processor  1222 , and/or a power transmission unit  1223 . The charger  1220  may receive power from a power supply  1230  to charge the battery  1210  (dotted line direction). Detailed description is as follows. 
     First, the temperature sensor of the battery may detect a temperature that changes as the power storage unit is discharged/charged. The temperature sensor may transmit the detected temperature to the first processor. The first processor may transmit information related to the temperature transmitted from the temperature sensor to the first communication unit. The first communication unit may transmit the transmitted temperature information to the second communication unit through second wired/wireless communication of the charger. The switch may transmit power applied from the charger to the power storage unit or shut off the power applied from the charger under the control of the first processor. For example, when the temperature detected by the temperature sensor is outside the discharge allowable temperature range, the first processor may prevent the power from being applied to the power storage unit by shutting off the switch. 
     Subsequently, the second communication unit of the charger may obtain the temperature information of the power storage unit from the first communication unit of the battery. The second communication unit may transmit the obtained temperature information to the second processor. 
     When the temperature of the battery (or the power storage unit) is outside the discharge allowable temperature range, the second processor may shut off the power applied to the battery. When the temperature of the battery is within the charge allowable temperature range, the second processor may apply a constant voltage or a constant current to the battery. When the temperature of the battery is outside the charge allowable temperature range and within the discharge allowable temperature range, the second processor may charge the battery by applying a pulse wave of a predetermined period of 1 second or less to the battery. The power transmission unit of the charger may transmit power supplied from the power supply (e.g. a power outlet) to the battery under the control of the second processor. 
       FIG. 13  is a diagram illustrating the battery and the charger of  FIG. 12  in terms of signal processing. As shown in  FIG. 13 , a battery  1310  may include at least one switch  1315 , a power storage unit  1314 , and a processor  1312 / 1313 . Here, the processor may detect a temperature of the power storage unit and transmit temperature information to a charger  1320 . 
     A processor  1322  of the charger  1320  may generate/control a pulse waveform based on the temperature information transmitted from the battery, and transmit the generated pulse waveform to the battery. When the pulse waveform is transmitted to the battery  1310 , power is stored in the power storage unit  1314 . 
       FIG. 14  illustrates a temperature distribution according to an embodiment of the present disclosure. As shown in  FIG. 14 , a charge allowable temperature range may mean a range between a charge allowable minimum temperature and a charge allowable maximum temperature. That is, the charge allowable temperature range may be determined by an allowable operating temperature parameter (e.g. a Minimum/Maximum Operating Temperature Parameter) and/or an allowable surface temperature parameter (e.g. a Minimum/Maximum Surface Temperature Parameter). Here, the allowable operating temperature parameter and/or the allowable surface temperature parameter may be set in advance by the user/manufacturer as described above. For example, an allowable operating temperature lower limit or an allowable surface temperature lower limit may be preset at 0 degrees Celsius, and an allowable operating temperature upper limit or an allowable surface temperature upper limit may be preset at 50 degrees Celsius. That is, a range  1401  between 0 degrees Celsius and 50 degrees Celsius may be defined as the charge allowable temperature range. 
     The charge allowable temperature range may mean a temperature range in which a probability that an exothermic reaction of a predetermined amount or more occurs in a battery is greater than or equal to a threshold value as the battery is charged. For example, the charge allowable temperature range may mean a section or range between 0 degrees Celsius and 50 degrees Celsius. Here, the charge allowable temperature range may be preset in advance by the user or may be specified in advance by the manufacturer. 
     The discharge allowable temperature range may mean a range between a discharge temperature lower limit and a discharge temperature upper limit. For example, a discharge allowable temperature lower limit value may be set in advance to −20 degrees Celsius, and a discharge allowable temperature upper limit value may be set in advance to 80 degrees Celsius. That is, a range  1402  between −20 degrees Celsius and 80 degrees Celsius may be defined as the discharge allowable temperature range. 
     The discharge allowable temperature range may mean a temperature range in which a probability that an exothermic reaction of a predetermined amount or more occurs in a battery is greater than or equal to a threshold value as the battery is discharged. For example, the discharge allowable temperature range may mean a section between −20 degrees Celsius and 80 degrees Celsius. Here, the discharge allowable temperature range may be preset in advance by the user or may be specified in advance by the manufacturer. 
     More specifically, the charger may not charge the battery outside the discharge allowable temperature range. The charger may charge the battery within the charge allowable temperature range and charge the battery by applying a constant voltage or a constant current to the battery. 
     According to an embodiment of the present disclosure, the charger may charge the battery in the predetermined first section (e.g., within the discharge allowable temperature range and outside the charge allowable temperature range), but may charge the battery by applying a pulse wave of a predetermined period without applying a constant voltage or a constant current. This is because, when the battery is charged by applying the constant voltage or the constant current in the first section, the probability that the exothermic reaction occurs in the battery in which the temperature of the first section is detected is greater than or equal to the threshold. That is, when the pulse wave of the predetermined period is applied in the first section instead of the constant voltage or the constant, the voltage of the battery can be charged while the probability that the exothermic reaction occurs in the battery is equal to or less than the threshold value. 
     Here, the period of the pulse wave applied from the charger to the battery may be 1 second or less. This is because applying a pulse wave of a period greater than 1 second to the battery has the same effect (e.g. the exothermic reaction) as applying the constant voltage or the constant current to the battery. For this reason, the charger may charge the battery in which the temperature of the first section is detected by using the pulse wave of the period of 1 second or less. Here, a total of a section  1403  between −20 degrees Celsius and 0 degrees Celsius and a section  1404  between 50 degrees Celsius and 80 degrees Celsius may be defined as the predetermined first section referred to in  FIG. 11 . 
       FIG. 15  is a graph illustrating a change in temperature with a change in time. As shown in  FIG. 15 , for example, when the temperature of the battery is 0 degrees Celsius when t=0 (minute), when the battery is discharged as the cleaner operates, the temperature of the battery increases in proportion to time as time passes. In this case, a section between 0 degrees Celsius and 50 degrees Celsius may be preset to a charge allowable temperature range. 
     For example, as the cleaner operates, the temperature of the battery may be 80 degrees Celsius when t=60 (minutes). According to the prior art, even if the user wants to charge the battery of the cleaner, as the temperature of the battery exceeds 50 degrees Celsius in the section between t=60 (minutes) and t=90 (minutes), because it is outside the charging allowable temperature range, the battery cannot be charged. Therefore, when the user wants to charge the battery of the cleaner, there is an inconvenience to wait from t=60 (minutes) to t=90 (minutes). 
     However, according to an embodiment of the present disclosure, when connecting a cleaner with a battery to a charger at t=60 (minutes), the charger may charge the battery by applying a pulse wave to the battery in the section between t=60 (minutes) and t=90 (minutes) (a section within the discharge allowable temperature range and outside the charge allowable temperature range). 
     When time elapses and t=90 (minutes) and the temperature of the battery drops below 50 degrees Celsius, the temperature of the battery will be within the charge allowable temperature range, in this case, the charger may charge the battery by applying a constant voltage or a constant current to the battery. 
       FIG. 16  illustrates one example of a pulse wave according to an embodiment of the present disclosure. As shown in  FIG. 16 , the charger may apply a pulse wave of T (period)=1 s to the battery. For example, a peak of the pulse wave may be 1V. For example, a duration L of the pulse wave may be 0.2 (s). 
       FIG. 17  illustrates another example of a pulse wave according to an embodiment of the present disclosure. As shown in  FIG. 17 , the charger may apply a pulse wave of T (period)=0.5 s to the battery. 
       FIG. 18  illustrates another example of a pulse wave according to an embodiment of the present disclosure. As shown in  FIG. 18 , the charger may apply a pulse wave of T (period)=0.25 s to the battery. 
       FIG. 19  illustrates another example of a pulse wave according to an embodiment of the present disclosure. As shown in  FIG. 19 , the charger may apply a pulse wave of a duration L of 0.5 (s) and T (period)=1 s to the battery. 
       FIG. 20  illustrates the other example of a pulse wave according to an embodiment of the present disclosure. As shown in  FIG. 20 , the charger may apply a pulse wave of a duration L of 0.8 (s) and T (period)=1 s to the battery. 
     Although various types of pulse waves have been described with reference to  FIGS. 16 to 20 , they are not necessarily limited thereto. For example, the second processor of the charger may determine the duty ratio of the pulse wave based on the temperature information of the battery. For example, the second processor of the charger may change the duration of the pulse wave and/or a rest period between pulse waves in real time depending on the temperature of the battery. For example, the duration and/or rest period of the pulse wave may be adjusted based on a difference between a temperature of the battery and a charge temperature allowable range, such as to increase the duration, reduce the rest period, and/or increase a voltage/current applied to the battery during the pulse when the temperature of the battery drops to be closer to the charge temperature allowable range. In another example, the duty ratio of the pulse wave may be decreased if the temperature of the battery increases in response to the pulse wave. 
     Some embodiments or other embodiments of the present disclosure described above are not mutually exclusive or distinct from one another. Some embodiments or other embodiments of the present disclosure described above may be used in combination with or combined with each configuration or function. For example, it means that configuration A described in specific embodiments and/or drawings and configuration B described in other embodiments and/or drawings may be combined. In other words, even when the combination between the configurations is not described directly, it means that the combination is possible except when it is described that the combination is impossible. 
     The above detailed description should not be construed as limiting in all respects but should be considered as illustrative. The scope of the present disclosure should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present disclosure are included in the scope of the present disclosure. 
     An aspects of the present disclosure provides a control method of a charger capable of charging a battery of a cleaner more quickly and safely. In addition, the present disclosure provides a charger that can efficiently charge the battery even at a temperature outside the charge allowable range of the battery of the cleaner. 
     A control method of a charger according to an embodiment of the present disclosure includes obtaining temperature information of a battery from the battery when connected to the battery of a cleaner; and charging the battery based on the temperature information, wherein the charging the battery is applying a pulse wave of a first period to the battery when the temperature of the battery is measured within a predetermined first section. 
     In addition, the first section may be determined based on predetermined maximum charge allowable temperature information and predetermined minimum charge allowable temperature information. In addition, the first period may be 1 second or less. In addition, the method may further include changing the first period based on the temperature information. In addition, the method may further include changing duration of the pulse wave based on the temperature information. 
     A charger according to an embodiment of the present disclosure includes a communication unit configured to obtain temperature information of the battery from an external battery; and a processor configured to apply power to the battery based on the temperature information transmitted from the communication unit, wherein the processor is configured to apply a pulse wave of a first period to the battery when the temperature of the battery is measured within a predetermined first section. 
     In addition, the processor may determine the first section based on predetermined maximum charge allowable temperature information and predetermined minimum charge allowable temperature information. In addition, the processor may determine the first period as 1 second or less. In addition, the processor may change the first period based on the temperature information. In addition, the processor may change duration of the pulse wave based on the temperature information. Even if the battery temperature is outside the charge allowance range due to the discharge of the battery built in the cleaner, the cleaner and control method thereof according to the present disclosure may shorten the total time required for charging the battery by charging the battery more quickly. 
     In addition, according to at least one of the embodiments of the present disclosure, it is possible to safely charge the battery even in a dangerous state in which the temperature of the battery of the cleaner is outside the charge allowance range, so that the present disclosure can prevent the risk that may occur when charging the battery. 
     It will be understood that when an element or layer is referred to as being “on” another element or layer, the element or layer can be directly on another element or layer or intervening elements or layers. In contrast, when an element is referred to as being “directly on” another element or layer, there are no intervening elements or layers present. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. 
     It will be understood that, although the terms first, second, third, etc., may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another region, layer or section. Thus, a first element, component, region, layer or section could be termed a second element, component, region, layer or section without departing from the teachings of the present invention. 
     Spatially relative terms, such as “lower”, “upper” and the like, may be used herein for ease of description to describe the relationship of one element or feature to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “lower” relative to other elements or features would then be oriented “upper” relative to the other elements or features. Thus, the exemplary term “lower” can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. 
     The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. 
     Embodiments of the disclosure are described herein with reference to cross-section illustrations that are schematic illustrations of idealized embodiments (and intermediate structures) of the disclosure. As such, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, embodiments of the disclosure should not be construed as limited to the particular shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. 
     Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. 
     Any reference in this specification to “one embodiment,” “an embodiment,” “example embodiment,” etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature, structure, or characteristic in connection with other ones of the embodiments. 
     Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.