Patent Publication Number: US-11376971-B2

Title: Automobile charger

Description:
RELATED APPLICATIONS 
     This application is a Continuation of U.S. patent application Ser. No. 17/131,113, filed Dec. 22, 2020, which is a Continuation of U.S. patent application Ser. No. 16/404,321, filed May 6, 2019, now U.S. Pat. No. 10,875,410, which is a Continuation of U.S. patent application Ser. No. 15/923,219, filed Mar. 16, 2018, now U.S. Pat. No. 10,328,806, which is a Continuation of U.S. patent application Ser. No. 15/355,409, filed Nov. 18, 2016, now U.S. Pat. No. 10,046,653, which is a Continuation of U.S. patent application Ser. No. 14/569,352, filed Dec. 12, 2014, now U.S. Pat. No. 9,525,297, which claims the benefit of priority of Chinese application no. 201420212173.5 filed Apr. 28, 2014, the entire contents of each are incorporated herein by reference. 
    
    
     BACKGROUND 
     The present disclosure relates to an automobile charging device, in particular relates to a novel automobile charger with a safe power supply charging quickly. 
     Automobile charging is a big issue of traveling by automobile for those automobile fans and businessmen, the maturity of the technology thereof is one of the critical factors restricting the application of the automobile charger. However, current automobile chargers have common problems of not able to automatically detect whether a load is connected, whether an electrode is connected with an automobile storage battery reversely, whether an automobile engine or the storage battery has a reverse current, whether the battery state is suitable for heavy current power generation and so on. Accordingly, the present disclosure provides a novel automobile charger with the safe power supply charging quickly to solve the problems mentioned above, thus making the automobile charging safe, quick, mature and propagable. 
     SUMMARY 
     A purpose of the present disclosure aims to provide a novel automobile charger with the safe power supply charging quickly, in order to solve the problems presented in the above background. 
     To achieve the purpose described above, the present disclosure provides the following technical solutions: a novel automobile charger comprises a direct current power supply, wherein a positive pole of the direct current power supply is connected with one end of a DC to DC module, one end of a battery voltage detection module and one end of a load module simultaneously, while a negative pole of the direct current voltage is connected with the other end of the DC to DC module, one end of a micro controller, one end of an automobile start control module and the other end of the battery voltage detection module simultaneously. A third end of the DC to DC module is connected with the other end of the microcontroller, and the other three ends of the microcontroller are connected with the third end of the battery voltage detection module, the other end of the automobile start control module and one end of the load detection module respectively, wherein the other end of the load detection module is connected with the third end of the automobile start control module and the other end of the load module simultaneously; the load module which comprises the automobile storage battery and the automobile engine is located on the end of the load module. 
     As a further solution of the present disclosure that: the DC to DC module provides a stable voltage for the microcontroller which collects relevant data to conduct the corresponding control. The battery voltage detection module conducts the measurement of the batter voltage, the automobile start control module conducts the power supply or the power outage for the load module through the microcontroller, and the load detection module which comprises the automobile storage battery or the automobile engine detects whether the load module is correctly connected. 
     As a further solution of the present disclosure that: the circuit employs an electronic switch to supply power to the load module, which can offer more protection for the product, or reduce the product size and the material cost. 
     As a further solution of the present disclosure that: the battery voltage detection module provides protection for the power supply battery to prevent damages caused by the discharging of the direct current power supply. 
     As a further solution of the present disclosure that: the load detection module prevents improper operations of the user. 
     As a further solution of the present disclosure that: in the standby mode, the microcontroller closes all outputs when the voltage of the direct current power supply is lower than that of the state being able to supply power and then recovers when it is higher than that of the state being able to supply power. 
     As a further solution of the present disclosure that: the automobile start control module is the electronic switch. 
     Compared to the prior art, the present disclosure has the beneficial effects that: 
     1. The present disclosure employs the electronic switch to control the supply power for the load, this part can offer more protection for the product, and reduce the product size and the material cost. 
     2. The battery detection of the present disclosure can provide low voltage protection to prevent damages caused by the over discharging of the battery. 
     3. The load detection of the present disclosure can prevent improper operations by the user, such as reversed polarity, which causes damages to the automobile or the direct current power supply. 
     4. The present disclosure employs the voltage backflow protection for abnormal load, wherein the automobile start line is closed to protect the battery when the abnormal voltage is detected. 
     5. The present disclosure has a fast charging function, and can be installed fixedly or moved portably according to the use requirements of people. 
     6. The automatic detection module of the present disclosure can automatically detects whether the load is connected, whether the electrode is connected with the automobile storage battery reversely, whether the automobile engine or the storage battery has reverse current, whether the battery state is suitable for heavy current power generation, thereby protecting the load and the circuit and thus has complete functions. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a block diagram for the principle of the emergency power supply of the safe intelligent automobile; 
         FIG. 2  is a circuit diagram for the emergency power supply of the safe intelligent automobile. 
     
    
    
     In figures:  1 —DC to DC module,  2 —microcontroller,  3 —battery voltage detection module,  4 —automobile start control module,  5 —load detection module,  6 —load module,  7 —direct current power supply. 
     DETAILED EMBODIMENTS 
     The technical solutions of the present disclosure will be described more clearly and fully in conjunction with drawings in the embodiments of the present disclosure, and obviously, the described embodiments are merely a part of the embodiments of the present disclosure, not all the embodiments. Based on the embodiments of the present disclosure, all the other embodiments obtained by the ordinary skilled in the art without creative labors belong to the scope claimed by the present disclosure. 
     Refer to  FIG. 1 , a novel automobile charger comprises a direct current power supply, wherein the positive pole of the direct current power supply is connected with one end or lead of the DC to DC module, one end of the battery voltage detection module and one end of the load module simultaneously, while the negative pole of the direct current voltage is connected with the other end of the DC to DC module, one end of the microcontroller, one end of the automobile start control module and the other end of the battery voltage detection module simultaneously. A third end of the DC to DC module is connected with the other end of the microcontroller, and the other three ends of the microcontroller are connected with the third end of the battery voltage detection module, the other end of the automobile start control module and one end of the load detection module respectively, wherein the other end of the load detection module is connected with the third end of the automobile start control module and the other end of the load module simultaneously; the load module which comprises the automobile storage battery and the automobile engine is located on the end of the load module. 
     Refer to  FIG. 2 , the DC to DC module comprises a diode D 1 , a resistor R 1 , capacitor C 1 , a HT7530 voltage stabilizing tube, capacitors C 2  and C 3 , wherein the positive pole of the diode D 1  is connected with the positive pole of the battery, the negative pole of the diode D 1  is connected with one end of the capacitor C 1  and an IN port of the HT7530 voltage stabilizing tube simultaneously through the resistor R 1 , and an OUT port of the HT7530 voltage stabilizing tube is connected with one end of the capacitor C 2 , one end of the capacitor C 3  and a VDD port of the microcontroller U 2 , while the other end of the capacitor C 1 , the other end of the capacitor C 2  and the other end of the capacitor C 3  as well as a GND port of the HT7530 voltage stabilizing tube are grounded and connected with the negative pole of the battery simultaneously; a R 1  port of the microcontroller U 2  is connected with the negative pole of the battery through a light-emitting diode L 1  and a resistor R 12  which are in series connection, a B 1  port of the microcontroller U 2  is connected with a EN port of the automobile start control module, a V 0  port of the microcontroller U 2  is connected with the negative pole of the battery through a capacitor C 4  and a resistor R 7  which are in parallel connection, the V 0  port is also connected with the VDD port through a slide rheostat RT, a V 1  port of the microcontroller U 2  is also connected with the negative pole of the battery through a resistor  10 , a capacitor C 6  and a resistor R 13  which are in parallel connection, the V 1  port is connected with the positive pole of the battery through a resistor R 2 , and is also connected with the negative pole of the automobile storage battery and the automobile engine simultaneously through a resistor R 9 , wherein two ends of the automobile storage battery are in parallel connection with the capacitor C 7 , resistors R 9 ,  10 , a capacitor C 6  and a resistor R 13  to form the load detection module together, a V 4  port of the microcontroller U 2  is grounded through a capacitor C 5 , a VSS port of the microcontroller U 2  and one end of the capacitor C 4  are grounded simultaneously. The other end of the capacitor C 4  is connected with the VDD port of the microcontroller U 2 , the resistors R 2 , R 13  and capacitor C 6  form the battery voltage detection module together, and a Drive port of the automobile start control module is connected with the automobile engine and one end of a resistor R 14  simultaneously, wherein the other end of the resistor R 14  is grounded. 
     The DC to DC module in the present disclosure provides the stable voltage for the microcontroller which collects relevant data to conduct the corresponding control. The battery voltage detection module conducts the measurement of the batter voltage, and the automobile start control module conducts the power supply or the power outage for the load module through the microcontroller, wherein the load detection module detects whether the load module is correctly connected. 
     The microcontroller in the present disclosure determines whether the automobile storage battery is connected with the automobile engine through the load detection module, wherein the automobile start control model is automatically activated and the battery starts to supply power to the load module when the load is correctly connected; the automobile start control model is automatically deactivated and the battery stops supplying power to the load module when assuming that the load is not connected or the positive and negative polarities are reversely connected. In the standby mode, the microcontroller closes all outputs when the battery voltage is lower than 9V, and recovers the normal operation only when the battery voltage is larger than 10V; the automobile engine will generate the normal voltage to recharge the battery after the automobile starts, whereas the automobile start control module is deactivated immediately once the recharging voltage is larger than the voltage before that battery starts the power supply, to protect the battery from damages caused by charging with the normal voltage; the automobile start control module is the electronic switch, which can prevent the load from being reversely connected and recharging of the normal voltage, thus protecting the battery and prolonging lifespan. 
     The automobile engine will generate abnormal voltage to recharge the direct current power supply after the automobile starts, and the automobile start control module is deactivated immediately once the recharging voltage is larger than the voltage before the direct current power supply starts the power supply, to protect the direct current power supply from damages caused by charging with normal voltage charge. 
     It is obvious for the skilled people in the art that the present disclosure is not merely limited to the details of the above exemplary embodiments, and the present disclosure can be implemented in other specific forms without departing from the sprits or the basic features of the present disclosure. Thus, no matter to consider from which point of view, the embodiments should be considered as exemplary and non-limiting. The scope of the present disclosure is defined by the accompanying Claims rather than the above description, therefore it is intended that all the changes fallen within the meanings and scope of the equivalent elements of the Claims are contained in the present disclosure. Any drawing reference in the Claims should not be regarded as limiting the Claims involved. 
     Furthermore, it should be understood that although the specification is described according to the embodiments, but not every embodiment includes only an independent technical solution, this manner of description for the specification is only for clarity, therefore the skilled people in the art should take the Specification as a whole, and the technical solutions in various embodiments can be combined appropriately to form other implementations understandable for those skilled in the art.