Abstract:
The present patent application relates to a battery pack for connecting to a cordless power tool to supply power thereto, the battery pack may supply two volumes or more than two volumes of voltage or capacity to the cordless electric device, the battery pack provided with a first connection terminal set which electrically connected to a battery cell set, the first connection terminal set provided with a transmission switch, shift the transmission switch to connect two sets or more than two sets of battery cell sets in series or in parallel so that output two volumes or more than two volumes of voltage or capacity.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims benefits of Chinese patent application no. 201010145919.1 filed on Apr. 12, 2010, the entire content of which is hereby incorporated by reference. 
       TECHNICAL FIELD 
       [0002]    The present patent application relates to a battery pack, in particular, relates to a battery pack which is able to supply multiple volumes of voltage/capacity. 
         [0003]    The present patent application relates to a combination of a battery pack and an electrical device as well, in particular, relates to a combination thereof the battery pack is able to supply two volumes of voltage or more than two volumes of voltage/capacity to the electrical device. 
       BACKGROUND 
       [0004]    In the recent years, along the development of the material made battery cell, the capacity of the battery cell has been enlarged in a very large extent; the applicable scope of them has also extended from the small power electronic electrical device to the large power electronic electrical device, such as power tools, and so on. In this case, the power tool equipped with this kind of large power battery cell is able to escape the limit of the cable and can be used at any time and everywhere. For enhancing the rate of use, this kind of battery normally equipped with re-chargeable battery pack, such as Nickel-cadmium battery, Nickel-Metal Hydride battery, Lithium-ion battery pack, and so on. 
         [0005]    In the normal battery pack available in the market, all the batteries connected together by wires, two terminals remain for outputting one voltage or capacity; it only can supply power to the electric device which require same volume power other than the power tools which required larger or smaller volume power as the voltage or capacity outputted by this kind of battery is not variable, so, the applicable scope of them is limited, it takes inconvenience to the user. 
         [0006]    Besides, what normal in the market is that dispose electronic element on the battery pack or on the electric device, the voltage outputted by the battery pack is regulated by the electronic element, so that part of the capacity of the battery pack must be consumed by the electronic element and the usage rate of the battery pack does not reach the maximum extent as the existence of the devices such as electronic element, and the cost of the electric device or battery pack is enhanced in a very large extent. 
       SUMMARY 
       [0007]    The present patent application supplies a battery pack which can supply multiple volumes of voltage or capacity, furthermore, the cost of design and product is comparatively low. 
         [0008]    The present patent application supplies a combination of battery pack and electric device, therein, the battery pack can supply multiple volumes of voltage or capacity to the electric device, furthermore, the cost of design and product is comparatively low. 
         [0009]    For realization of one of the foregoing aims, the technical solution of the present patent application comprising: 
         [0010]    A battery pack supplies two volumes or more than two volumes of voltage or capacity. 
         [0011]    According to another embodiment of the present patent application, the battery pack further comprises two sets or more than two set of battery cell, the two sets or more than two sets of battery cell connected in series or in parallel and two volumes or more than two volumes of voltage or capacity could be outputted therefrom. 
         [0012]    According to a further another embodiment of the present patent application, the battery pack provided with a first terminal set which is electrically connected to the battery cell set, the first terminal set provided with a transmission switch, shifting the transmission switch, at least two set of battery cells connected in series or in parallel so as to supply two volumes or more than two volumes of voltage or capacity out. 
         [0013]    According to a further another embodiment of the present patent application, the battery pack can be used for connection to a cordless power tool and supply voltage or capacity thereto. 
         [0014]    According to further another embodiment of the present patent application, the first terminal set at least including a first positive terminal, a first negative terminal, a first positive terminal′ and a first negative terminal′, when two sets of battery cell or more than two sets of battery cell connected in parallel so as to output voltage or capacity, via shifting a transmission switch, the first positive terminal being electrically connected to the first positive terminal′ and the first negative terminal being electrically connected to the first negative terminal′; when two sets of battery cell or more than two sets of battery cell connected in series so as to output voltage or capacity, via shifting a transmission switch, the first negative terminal being electrically connected to the first positive terminal′ and the first positive terminal being electrically connected to the first negative terminal′. 
         [0015]    According to further another embodiment of the present patent application, the transmission switch works electronically or mechanically. 
         [0016]    For realization of one of the foregoing aims, the technical solution of the present patent application also could be: 
         [0017]    A combination of a battery pack and an electrical device, comprising: 
         [0018]    A battery pack, which including two sets or more than two sets of battery cell and a first terminal set that electrically connected to the battery cell sets; 
         [0019]    A electrical device, which including a second connection terminal set that responses to the first connection terminal set so that two volumes or more than two volume of voltage or capacity outputted from the battery pack to the electrical device. 
         [0020]    Therein, when the working voltage of the electrical device being the voltage of a set of battery pack or being the plus of two sets or more than two sets of battery cell, the second connection terminal set of the electrical device connected to the first connection terminal set of the battery pack so as to connect two sets of battery cell or more than two sets of batteries in parallel; when the working voltage of the electrical device being the plus of the voltage/capacity of two sets or more than two sets of battery cell, the second connection terminal set of the electrical device connected to the connection first terminal set of the battery pack so as to connect two sets of battery cell or more than two sets of batteries in series. 
         [0021]    According to further another embodiment of the present patent application, the first connection terminal set at least including a first positive terminal, a first negative terminal, a first positive terminal′ and a first negative terminal′, the second connection terminal set including a second positive terminal and a second negative terminal which are correspondingly connected to the first positive terminal and the first negative terminal, and a second positive terminal′ and a second negative terminal′ which are correspondingly connected to the first positive terminal′ and the first negative terminal′ 
         [0022]    According to further another embodiment of the present patent application, the electrical device is a cordless power tool. 
         [0023]    According to further another embodiment of the present patent application, when the working voltage of the electrical device being the voltage of a set of battery cell, the second positive terminal electrically connected to the second positive terminal′, the second negative terminal electrically connected to the second negative terminal′. 
         [0024]    According to further another embodiment of the present patent application, when the working voltage of the electrical device being the plus of two sets of battery cell or the plus of more than two sets of battery cell, the second negative terminal electrically connected to the second positive terminal′, the second positive terminal electrically connected to the second negative terminal′. 
         [0025]    Technical advantages of the present patent application are as follows: comparison with the state of art, without additionally adding any electronic element so that the unnecessary consuming of power is avoided; moreover, the battery pack of the present patent application can supply power to the electric devices which require different voltage so that it can be used for supplying power to the electric devices which are with different rated voltage; the university of is very high so that the manufacturing cost reduced. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0026]      FIG. 1  is a circuit diagram of one preferred embodiment of the present patent application which composed two sets of battery cell. 
           [0027]      FIG. 2  is a circuit diagram of another preferred embodiment of the present patent application which composed three sets of battery cell. 
           [0028]      FIG. 3  and  FIG. 4  are circuit diagrams of further another preferred embodiment of the present patent application which composed two sets of battery cell. 
           [0029]      FIG. 5  and  FIG. 6  are circuit diagrams of further another preferred embodiment of the present patent application which composed three sets of battery cell. 
       
    
    
     DETAILED DESCRIPTION 
       [0030]    The present patent application will be described in detail by reference the drawings and the preferred embodiments. All drawings are simplified illustration diagrams, only serve as references of the basic structure of the present patent application in schematic way, so, they only illustrate the composition which is relevant to the present patent application. 
         [0031]      FIG. 1  is a circuit diagram of one preferred embodiment of the present patent application which composed two sets of battery cell. What easy understood to those skilled in the art are as follows, battery pack  10 , power tool  20 , the battery pack  10  comprises two sets of battery cell set  11 , a first connection terminal set  12  which is correspondingly electrically connected to the battery cell set  11 , the power tool  20  comprises a motor  21 , a second connection terminal set  22  which is correspondingly electrically connected to the first connection terminal set  12 . The first connection terminal set  12  provided with a transmission switch  15 . 
         [0032]    In this embodiment, the battery cell set  11  is composed by 5 battery cells, the rated voltage of each battery cell is 3.8V therein and the rated voltage of each battery cell set is 19V, of course, in other embodiments, the type of the battery cell or the number of the battery cells in the composition could be vary, depending on the different working conditions and could be decided according to the concrete situation. 
         [0033]    In the embodiment, the battery pack  10  further provided with a first interface  13 , the first connection terminal set  12  comprises a first positive terminal  12   a , a first negative terminal  12   b , a first positive terminal′  12   a ′ and a first negative terminal′  12   b ′, the first positive terminal  12   a  and the first negative terminal  12   b  located at the first interface  13 , the first positive terminal′  12   a ′ and the first negative terminal′  12   b ′ also located at the first interface  13 , the second connection terminal set  22  comprises a second positive terminal  22   a  and a second negative terminal  22   b . Herein, shift the transmission switch  15  to connect two sets of battery cell set  11  in parallel and output voltage to the first positive terminal  12   a  and the first negative terminal′  12   b ′ so that the outputting voltage between the first positive terminal  12   a  and the first negative terminal′  12   b ′ is 19V; shift the transmission switch  15  to connect two sets of battery cell set  11  in series and output voltage to the first positive terminal  12   a  and the first negative terminal′  12   b ′ so that the outputting voltage between the first positive terminal  12   a  and the first negative terminal′  12   b ′ is 38V. 
         [0034]    Therein, when the required voltage of the motor  21  is 20V, firstly, shifting the transmission switch  15 , electrically connect the first positive terminal  12   a  to the first positive terminal′  12   a ′ and electrically connect the first negative terminal  12   b  to the first negative terminal′  12   b ′, and then, connect the power tool  20  into the first interface  13  of the battery pack  10 , at this moment, the first positive terminal  12   a  connected to the second positive terminal  22   a , the first negative terminal′  12   b ′ connected to the second negative terminal  22   b , so that the voltage outputted from battery pack  10  to the power tool  20  is 19V and drives the motor  21  to run. 
         [0035]    When the required voltage of the motor  21  is 40V, firstly, shifting the transmission switch  15 , electrically connect the first negative terminal  12   b  to the first positive terminal′  12   a ′, and then, connect the power tool  20  into the first interface  13  of the battery pack  10 , at this moment, the first positive terminal  12   a  connected to the second positive terminal  22   a , the first negative terminal′  12   b ′ connected to the second negative terminal  22   b , so that the voltage outputted from battery pack  10  to the power tool  20  is 38V and drives the motor  21  to run. 
         [0036]      FIG. 2  is a circuit diagram of another preferred embodiment of the present patent application which composed three sets of battery. 
         [0037]    In this second embodiment, the battery pack  10  provided with a first interface  13 , the first connection terminal set  12  comprises a first positive terminal  12   a , a first negative terminal  12   b , a first positive terminal′  12   a ′, a first negative terminal′  12   b ′, a first positive terminal″  12   a ″ and a first negative terminal″  12   b ″. The first positive terminal  12   a , the first negative terminal  12   b , the first positive terminal′  12   a ′, the first negative terminal′  12   b ′, the first positive terminal″  12   a ″ and the first negative terminal″  12   b ″ located at the first interface  13 , the second connection terminal set  22  comprises a second positive terminal  22   a  and a second negative terminal  22   b . Therein, three battery cell sets  11  connected in parallel and output a voltage to the first positive terminal  12   a  and the first negative terminal″  12   b ″, so that the rated outputting voltage between the first positive terminal  12   a  and the first negative terminal″  12   b ″ is 19V; three battery cell sets  11  connected in series and outputs voltage to the first positive terminal  12   a  and the first negative terminal″  12   b ″, so that the rated outputting voltage between the first positive terminal  12   a  and the first negative terminal″  12   b ″ is 57V. 
         [0038]    Therein, when the required voltage of the motor  21  is 20V, firstly, shifting the transmission switch  15 , electrically connect the first positive terminal  12   a , the first positive terminal′  12   a ′ and the first positive terminal″  12   a ″ together, and, electrically connect the first negative terminal  12   b , the first negative terminal′  12   b ′ and the first negative terminal″  12   b ″ together, and then, connect the power tool  20  into the first interface  13  of the battery pack  10 , at this moment, the first positive terminal  12   a  connected to the second positive terminal  22   a , the first negative terminal″  12   b ″ connected to the second negative terminal  22   b , so that the voltage outputted from battery pack  10  to the power tool  20  is 19V and drives the motor  21  to run. 
         [0039]    Therein, when the required voltage of the motor  21  is 60V, firstly, shifting the transmission switch  15 , electrically connect the first negative terminal  12   b  to the first positive terminal′  12   a ′, electrically connect the first negative terminal  12   b  to the first positive terminal″  12   a ″, and then, connect the power tool  20  into the first interface  13  of the battery pack  10 , at this moment, the first positive terminal  12   a  connected to the second positive terminal  22   a , the first negative terminal″  12   b ″ connected to the second negative terminal  22   b , so that the voltage outputted from battery pack  10  to the power tool  20  is 57V and drives the motor  21  to run. 
         [0040]      FIG. 3  and  FIG. 4  are circuit diagrams of further other preferred embodiments of the present patent application which composed two sets of battery cell. The battery pack  10  provided with a first interface  13  as well, the first connection terminal set  12  comprises a first positive terminal  12   a , a first negative terminal  12   b , a first positive terminal′  12   a ′, a first negative terminal′  12   b ′, the first positive terminal  12   a , the first negative terminal  12   b , the first positive terminal′  12   a ′, the first negative terminal′  12   b ′ located at the first interface  13 , the second connection terminal set  22  comprises a second positive terminal  22   a  and a second negative terminal  22   b  which correspondingly electrically connected to the first positive terminal  12   a  and the first negative terminal  12   b , and, a second positive terminal′  22   a ′ and a second negative terminal′  22   b ′ which electrically connected to the first positive terminal′  12   a ′ and the first negative terminal′  12   b ′. Therein, the second positive terminal  22   a  electrically connected to the second positive terminal′  22   a ′, the second negative terminal  22   b  electrically connected to the second negative terminal′  22   b ′, so that two sets of battery cell  11  are connected in parallel, and then the rated voltage which outputted from the battery pack to the motor  21  is 19V; the second negative terminal  22   b  electrically connected to the second positive terminal′  22   a ′, the second positive terminal  22   a  electrically connected to the second negative terminal′  22   b ′, so that two sets of battery cell  11  are connected in series, and then the rated voltage which outputted from the battery pack  10  to the motor  21  is 38V. 
         [0041]    Reference to  FIG. 3 , when the required voltage of the motor  21  is 20V, connect the power tool  20  into the first interface  13  of the battery pack  10 , at this moment, the first positive terminal  12   a  connected to the second positive terminal  22   a , the first negative terminal  12   b  connected to the second negative terminal  22   b , the first positive terminal′  12   a ′ connected to the second positive terminal′  22   a ′, the first negative terminal′  12   b ′ connected to the second negative terminal′  22   b ′, the second positive terminal  22   a  connected to the second positive terminal′  22   a ′, the second negative terminal  22   b  connected to the second negative terminal′  22   b ′, so that the rated voltage which outputted from the battery pack  10  to the motor  21  is 19V and drives the motor  21  to run. 
         [0042]    Reference to  FIG. 4 , when the required voltage of the motor  21  is 40V, connect the power tool  20  into the first interface′  13 ′ of the battery pack  10 , at this moment, the first positive terminal  12   a  connected to the second positive terminal  22   a , the first negative terminal  12   b  connected to the second negative terminal  22   b , the first positive terminal′  12   a ′ connected to the second positive terminal′  22   a ′, the first negative terminal′  12   b ′ connected to the second negative terminal′  22   b ′, the second negative terminal  22   b  connected to the second positive terminal′  22   a ′, the second positive terminal  22   a  connected to the second negative terminal′  22   b ′, so that the rated voltage which outputted from the battery pack  10  to the power tool  20  is 38V and drives the motor′  21 ′ to run. 
         [0043]      FIGS. 5 and 6  are circuit diagrams of further another preferred embodiment of the present patent application which composed three sets of battery. The battery pack  10  provided with a first interface  13  as well, the first connection terminal set  12  comprises a first positive terminal  12   a , a first negative terminal  12   b , a first positive terminal′  12   a ′, a first negative terminal′  12   b ′, a first positive terminal″  12   a ″ and a first negative terminal″  12   b ″. The first positive terminal  12   a , the first negative terminal  12   b , the first positive terminal′  12   a ′, the first negative terminal′  12   b ′, the first positive terminal″  12   a ″ and the first negative terminal″  12   b ″ located at the first interface  13 , the second connection terminal set  22  comprises a second positive terminal  22   a  and a second negative terminal  22   b  which are correspondingly electrically connected to the first positive terminal  12   a  and the first negative terminal  12   b , a second positive terminal′  22   a ′ and a second negative terminal′  22   b ′ which correspondingly electrically connected to the first positive terminal′  12   a ′ and the first negative terminal′  12   b ′, a second positive terminal″  22   a ″ and a second negative terminal″  22   b ″ which correspondingly electrically connected to the first positive terminal″  12   a ″ and the first negative terminal″  12   b ″. Therein, second positive terminal  22   a , the second positive terminal′  22   a ′ and the second positive terminal″  22   a ″ electrically connected, the second negative terminal  22   b , the second negative terminal′  22   b ′ and the second negative terminal″  22   b ″ electrically connected, so that three sets of battery cell are connected in parallel, and then the rated voltage which outputted from the battery pack  10  to the motor  21  is 19V; the second negative terminal  22   b  electrically connected to the second positive terminal′  22   a ′, the second positive terminal″  22   a ″ electrically connected to the second negative terminal′  22   b ′, so that three sets of battery cell are connected in series, and then the rated voltage which outputted from the battery pack  10  to the motor  21  is 57V. 
         [0044]    Reference to  FIG. 5 , when the required voltage of the motor  21  is 20V, connect the power tool  20  into the first interface  13  of the battery pack  10 , at this moment, the first positive terminal  12   a  connected to the second positive terminal  22   a , the first negative terminal  12   b  connected to the second negative terminal  22   b , the first positive terminal′  12   a ′ connected to the second positive terminal′  22   a ′, the first negative terminal′  12   b ′ connected to the second negative terminal′  22   b ′, the first positive terminal″  12   a ″ connected to the second positive terminal″  22   a ″, the first negative terminal″  12   b ″ connected to the second negative terminal″  22   b ″, the second positive terminal  22   a  and the second positive terminal′  22   a ′ electrically connected to the second positive terminal″  22   a ″, the second negative terminal  22   b  and the second negative terminal′  22   b ′ electrically connected to the second negative terminal″  22   b ″, so that the rated voltage which outputted from the battery pack  10  to the motor  21  is 19V and drives the motor  21  to run. 
         [0045]    Reference to  FIG. 6 , when the required voltage of the motor′  21 ′ is 20V, connect the power tool  20  into the first interface  13 ′ of the battery pack  10 , at this moment, the first positive terminal  12   a  connected to the second positive terminal  22   a , the first negative terminal  12   b  connected to the second negative terminal  22   b , the first positive terminal′  12   a ′ connected to the second positive terminal′  22   a ′, the first negative terminal′  12   b ′ connected to the second negative terminal′  22   b ′, the first positive terminal″  12   a ″ connected to the second positive terminal″  22   a ″, the first negative terminal″  12   b ″ connected to the second negative terminal″  22   b ″, the second negative terminal  22   b  electrically connected to the second positive terminal′  22   a ′, the second positive terminal″  22   a ″ electrically connected to the second negative terminal′  22   b ′, so that the rated voltage which outputted from the battery pack  10  to the power tool  20  is 38V and drives the motor′  21 ′ to run. 
         [0046]    By effectively selecting the outputting voltage of the battery pack  10 , in the condition of without adding additional electronic element, so that the unnecessary power consume of the electronic element avoided; besides, the battery pack of the present patent application may supply power to the electric devices which require different voltages so that it can be used on the electric devices with different rating voltages; the ability of universal application is very high and the manufacturing cost apparently reduced. 
         [0047]    Of course, the number of the battery cell set could be four sets, five sets and even more. 
         [0048]    With the hint of the above preferred embodiments, according to the foregoing detailed description of the patent application, those who are skilled in the art may make multiple alternations and modifications without bias the basic theory of the present patent application. The technical scope of the present patent application is not limited to the foregoing described content and it has to be defined according to the scope of the claims.