Battery assembly and electronic equipment

Abstract

The embodiment of the invention provides a battery assembly and electronic equipment. The battery assembly comprises a battery cell and a protection plate assembly; the battery cell is provided with a first polarity tab and a second polarity tab, and the first polarity is different from the second polarity; the protection plate assembly comprises a first connector, a second connector, a printed circuit board and a protection circuit, the first connector is used for being electrically connected to the first polarity tab, the second connector is used for being electrically connected to the second polarity tab, and the protection circuit is located on the printed circuit board. The protection circuit is electrically connected between the first polarity tab and the first connector; or the protection circuit is electrically connected between the second polarity tab and the second connector. According to the battery assembly provided by the embodiment of the invention, the wire resistance of the protection plate assembly is relatively small.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery assembly and electronic equipment. Background Art

[0002] As the pace of life accelerates, people are increasingly using various electronic devices, such as mobile phones. Electronic devices often include battery assemblies to power their electrical components. However, the protection boards of battery assemblies in related technologies have high line resistance. Summary of the Invention

[0003] In a first aspect, an embodiment of the present application provides a battery assembly, the battery assembly comprising:

[0004] A battery cell having a first polarity tab and a second polarity tab, wherein the first polarity is different from the second polarity; and

[0005] A protection board assembly, the protection board assembly includes a first connector, a second connector, a printed circuit board and a protection circuit, the first connector is used to electrically connect to the first polarity tab, the second connector is used to electrically connect to the second polarity tab, the protection circuit is located on the printed circuit board, and the protection circuit is electrically connected between the first polarity tab and the first connector; or, the protection circuit is electrically connected between the second polarity tab and the second connector.

[0006] In a second aspect, an embodiment of the present application provides an electronic device, wherein the electronic device includes the battery assembly as described in the first aspect.

[0007] In summary, in the battery assembly provided in the embodiments of the present application, the first connector is electrically connected to the first polarity tab, and the second connector is electrically connected to the second polarity tab. Therefore, a relatively short conductive wire can be provided in the protection plate assembly to electrically connect the first polarity tab and the first connector. Correspondingly, a relatively short conductive wire can be provided in the protection plate assembly to electrically connect the second polarity tab and the second connector. Thus, in the battery assembly provided in the embodiments of the present application, the first connector is used to electrically connect to the first polarity tab, and the second connector is used to electrically connect to the second polarity tab, thereby reducing the line resistance of the protection plate assembly.

[0008] In addition, in the battery assembly provided in the embodiment of the present application, the protection circuit is located on the printed circuit board. Therefore, the protection circuit does not need to occupy the area of ​​the main board. As a result, when the battery assembly is used in an electronic device, the battery assembly has a larger size, which is beneficial to improving the capacity of the battery assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the implementation. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0010] Figure 1 A schematic diagram of a battery assembly provided in one embodiment of the present application;

[0011] Figure 2 for Figure 1 A schematic diagram of another perspective of the battery assembly shown in;

[0012] Figure 3 For one embodiment Figure 1 Schematic diagram of the equivalent circuit of the battery assembly shown in;

[0013] Figure 4 For another embodiment Figure 1 Schematic diagram of the equivalent circuit of the battery assembly shown in;

[0014] Figure 5 A schematic diagram of a battery assembly provided in another embodiment of the present application;

[0015] Figure 6 for Figure 5 A schematic diagram of another perspective of the battery assembly shown in;

[0016] Figure 7 A schematic diagram of a battery assembly provided in the first embodiment of the present application;

[0017] Figure 8 A schematic diagram of a battery assembly provided in a second embodiment of the present application;

[0018] Figure 9 A schematic diagram of a battery assembly provided in a third embodiment of the present application;

[0019] Figure 10 A schematic diagram of a battery assembly provided in a fourth embodiment of the present application;

[0020] Figure 11 A schematic diagram of a battery assembly provided in a fifth embodiment of the present application;

[0021] Figure 12 A schematic diagram of a battery assembly provided in a sixth embodiment of the present application;

[0022] Figure 13 A schematic diagram of a battery assembly provided in a seventh embodiment of the present application;

[0023] Figure 14A schematic diagram of a battery assembly provided in an eighth embodiment of the present application;

[0024] Figure 15 A schematic diagram of a battery assembly provided in a ninth embodiment of the present application;

[0025] Figure 16 A schematic diagram of a battery assembly provided in a tenth embodiment of the present application;

[0026] Figure 17 A schematic diagram of a battery assembly provided in the eleventh embodiment of the present application;

[0027] Figure 18 A schematic diagram of a battery assembly provided in the twelfth embodiment of the present application;

[0028] Figure 19 A schematic diagram of a battery assembly provided in the thirteenth embodiment of the present application;

[0029] Figure 20 A schematic diagram of a battery assembly provided in a fourteenth embodiment of the present application;

[0030] Figure 21 A schematic diagram of a battery assembly provided in one embodiment of the present application;

[0031] Figure 22 for Figure 21 A schematic diagram of another perspective of the battery assembly shown in;

[0032] Figure 23 A schematic diagram of a protection circuit for a battery assembly provided in one embodiment of the present application;

[0033] Figure 24 A schematic diagram of a protection circuit for a battery assembly provided in another embodiment of the present application;

[0034] Figure 25 A circuit diagram of a protection circuit in a battery assembly provided in one embodiment of the present application;

[0035] Figure 26 A schematic diagram of a protection circuit for a battery assembly provided in another embodiment of the present application;

[0036] Figure 27 A schematic diagram of an electronic device provided in one embodiment of the present application;

[0037] Figure 28 for Figure 27 Schematic diagram of a portion of the structure of the electronic device shown in FIG. DETAILED DESCRIPTION

[0038] The technical solution of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described in this application are only some embodiments, not all embodiments. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0039] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to mutually exclusive, independent, or alternative embodiments to other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0040] The terms "first," "second," and so on, in the specification and claims of this application and the accompanying drawings are used to distinguish between different objects, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a component or device comprising one or more parts is not limited to the one or more parts listed, but may optionally include one or more parts that are not listed but are inherent to the illustrated product, or one or more parts that should be present based on the described functionality.

[0041] Please also refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , Figure 1 A schematic diagram of a battery assembly provided in one embodiment of the present application; Figure 2 for Figure 1 A schematic diagram of another perspective of the battery assembly shown in; Figure 3 For one embodiment Figure 1 Schematic diagram of the equivalent circuit of the battery assembly shown in;

[0042] Figure 4 For another embodiment Figure 1Schematic diagram of an equivalent circuit of a battery assembly shown in . The battery assembly 10 includes a battery cell 100 and a protection board assembly 200. The battery cell 100 has a first polarity tab 110 and a second polarity tab 120, wherein the first polarity is different from the second polarity. The protection board assembly 200 includes a first connector 210, a second connector 220, a printed circuit board 230, and a protection circuit 240. The first connector 210 is used to electrically connect to the first polarity tab 110. The second connector 220 is used to electrically connect to the second polarity tab 120. The protection circuit 240 is located on the printed circuit board 230, and the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210; alternatively, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220.

[0043] The first polarity is different from the second polarity. Specifically, in one embodiment, the first polarity is positive, and the second polarity is negative; in other words, the first polarity tab 110 is a positive tab, and the second polarity tab 120 is a negative tab. Alternatively, in another embodiment, the first polarity is negative, and the second polarity is positive; in other words, the first polarity tab 110 is a negative tab, and the second polarity tab 120 is a positive tab. In this embodiment, the battery cell 100 having two first polarity tabs 110 and two second polarity tabs 120 is used as an example for illustration. It should be understood that this should not be construed as limiting the embodiments of this application.

[0044] The first connector 210 may be, but is not limited to, a board-to-board (BTB) connector. The second connector 220 may be, but is not limited to, a board-to-board (BTB) connector. In one embodiment, the first connector 210 is electrically connected to the first polarity tab 110, and the second connector 220 is electrically connected to the second polarity tab 120; the first connector 210 is not electrically connected to the second polarity tab 120, and the second connector 220 is not electrically connected to the first polarity tab 110.

[0045] The protection circuit 240 is disposed on the printed circuit board 230 . Therefore, the printed circuit board 230 is also called a protection board, a protection circuit board, or a protection board hard board.

[0046] In the battery assembly 10 of the related art, the first polarity tab 110 and the second polarity tab 120 of the battery cell 100 are spaced apart, and the same connector connects the first polarity tab 110 and the second polarity tab 120 at the same time. In the related art, the conductive wire electrically connecting the first polarity tab 110 to the connector is usually arranged side by side in the protective plate, and the conductive wire electrically connecting the second polarity tab 120 to the connector also needs to be arranged side by side in the protective plate. For the convenience of description, the conductive wire electrically connecting the first polarity tab 110 to the connector is named the first conductive wire, and the conductive wire electrically connecting the second polarity tab 120 to the connector is named the second conductive wire. In other words, in the battery assembly 10 of the related art, the first conductive wire of the protective plate electrically connects the first polarity tab 110 to the connector, and the first conductive wire is arranged side by side in the protective plate. The second conductive wire of the protective plate electrically connects the second polarity tab 120 to the connector, and the second conductive wire is arranged side by side in the protective plate. If the connector is close to the first polarity tab 110, the second conductive wire connecting the second polarity tab 120 and the connector will have a longer route. If the connector is close to the second polarity tab 120, the first conductive wire connecting the first polarity tab 110 and the connector will have a longer route. This shows that the longer routes of the first and second conductive wires in the related art result in a higher impedance on the protection board of the battery assembly 10.

[0047] In the battery assembly 10 provided in the embodiment of the present application, the first connector 210 is electrically connected to the first polarity tab 110, and the second connector 220 is electrically connected to the second polarity tab 120; however, the first connector 210 is not electrically connected to the second polarity tab 120, and the second connector 220 is not electrically connected to the first polarity tab 110. Therefore, a shorter conductive wire can be provided in the protection board assembly 200 to electrically connect the first polarity tab 110 and the first connector 210. Correspondingly, a shorter conductive wire can be provided in the protection board assembly 200 to electrically connect the second polarity tab 120 and the second connector 220. Thus, in the battery assembly 10 provided in the embodiment of the present application, the first connector 210 is used to electrically connect to the first polarity tab 110, and the second connector 220 is used to electrically connect to the second polarity tab 120, thereby reducing the line resistance of the protection board assembly 200.

[0048] Furthermore, the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210; or, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220. In other words, the protection circuit 240 is located in the path between the first polarity tab 110 and the first connector 210 (named as the first path); or, the protection circuit 240 is located in the path between the second polarity tab 120 and the second connector 220 (named as the second path). Therefore, the protection circuit 240 of the battery assembly 10 of the present application is located in a single path, and therefore, the protection circuit 240 is also called a single conductive loop. When the protection circuit 240 is located in the first path, the second polarity tab 120 and the second connector 220 do not need to be set up with complex connection lines to connect to the protection circuit 240; when the protection circuit 240 is located in the second path, the first polarity tab 110 and the first connector 210 do not need to be set up with complex connection lines to connect to the protection circuit 240, thereby further reducing the line resistance of the protection board assembly 200.

[0049] Furthermore, the printed circuit board 230 in the protective plate assembly 200 is a rigid board. Therefore, the printed circuit board 230 can be provided with the protective circuit 240. In one embodiment, the protective circuit 240 includes multiple electronic components. These multiple electronic components are provided on at least one surface of the printed circuit board 230.

[0050] In this embodiment, the printed circuit board 230 of the protection board assembly 200 in the battery provided in the embodiment of the present application is a hard board, and the protection circuit 240 is located on the printed circuit board 230. Therefore, the protection circuit 240 can utilize the space of the printed circuit board 230 without occupying the area of ​​the main board 70 of the electronic device 1.

[0051] In another related art battery assembly 10, a flexible circuit board connects the battery cell 100 and the protection circuit 240, and the protection circuit 240 is located on the main board 70. Generally speaking, a flexible circuit board (FPC) is a soft board that only includes conductive wires for transmitting electrical signals. Since the flexible circuit board is a soft board, the protection circuit 240 cannot usually be directly set on the flexible circuit board. If a flexible circuit board is required to connect the protection circuit 240, the protection circuit 240 needs to be set on the main board 70 of the electronic device 1 to which the battery assembly 10 is applied. When the protection circuit 240 is set on the main board 70 of the electronic device 1, the protection circuit 240 occupies part of the area of ​​the main board 70, thereby making the size of the main board 70 larger, thereby compressing the space of the battery assembly 10.

[0052] In the battery provided in the embodiment of the present application, the protection circuit 240 is located on the printed circuit board 230. Therefore, the protection circuit 240 does not need to occupy the area of ​​the main board 70. As a result, when the battery assembly 10 is used in the electronic device 1, the battery assembly 10 has a larger size, which is beneficial to improving the capacity of the battery assembly 10.

[0053] In summary, in the battery assembly 10 provided in the embodiment of the present application, the first connector 210 is electrically connected to the first polarity tab 110, and the second connector 220 is electrically connected to the second polarity tab 120; therefore, a relatively short conductive wire can be provided in the protection plate assembly 200 to electrically connect the first polarity tab 110 and the first connector 210. Correspondingly, a relatively short conductive wire can be provided in the protection plate assembly 200 to electrically connect the second polarity tab 120 and the second connector 220. Thus, in the battery assembly 10 provided in the embodiment of the present application, the first connector 210 is used to electrically connect to the first polarity tab 110, and the second connector 220 is used to electrically connect to the second polarity tab 120, thereby reducing the line resistance of the protection plate assembly 200.

[0054] In addition, in the battery assembly 10 provided in the embodiment of the present application, the protection circuit 240 is located on the printed circuit board 230. Therefore, the protection circuit 240 does not need to occupy the area of ​​the main board 70. As a result, when the battery assembly 10 is used in the electronic device 1, the battery assembly 10 has a larger size, which is beneficial to improving the capacity of the battery assembly 10.

[0055] Further, see Figure 1 In one embodiment of the present application, a battery assembly 10 is provided. The battery cell 100 has an end surface 100a. The first polarity tab 110 and the second polarity tab 120 are located on the end surface 100a. The printed circuit board 230 has a first surface 230a and a second surface 230b disposed opposite to each other in the thickness direction, with one of the first surface 230a and the second surface 230b facing the end surface 100a.

[0056] In this embodiment, the surface of the battery cell 100 where the first polarity tab 110 and the second polarity tab 120 are exposed is named the end surface 100a. The first polarity tab 110 and the second polarity tab 120 are located on the end surface 100a. The printed circuit board 230 has a first surface 230a and a second surface 230b disposed opposite to each other in the thickness direction, with one of the first surface 230a and the second surface 230b facing the end surface 100a. In this embodiment, the first surface 230a faces the end surface 100a, and the second surface 230b faces away from the end surface 100a compared to the first surface 230a. It should be understood that this should not be construed as limiting the battery assembly 10 provided in the embodiment of the present application. In other embodiments, the second surface 230b faces the end surface 100a, and the first surface 230a faces away from the end surface 100a compared to the second surface 230b.

[0057] In this embodiment, the bottom surface 100b and the end surface 100a of the battery cell 100 are arranged opposite to each other. The bottom surface 100b and the end surface 100a are arranged along a preset direction D1. In this embodiment, the preset direction D1 is the length direction of the battery cell 100. Figure 1 In the figure, the width direction of the battery cell 100 is designated as D2. When the preset direction D1 is the length direction of the battery cell 100, the arrangement direction of the bottom surface 100b and the end surface 100a is the length direction of the battery cell 100. Generally speaking, the thickness of the printed circuit board 230 is less than the width of the printed circuit board 230, and the thickness of the printed circuit board 230 is less than the length of the printed circuit board 230. The printed circuit board 230 has a first surface 230a and a second surface 230b disposed opposite to each other in the thickness direction, with one of the first surface 230a and the second surface 230b facing the end surface 100a. When the size of the battery cell 100 along the preset direction D1 is constant, the sum of the sizes of the battery cell 100 and the printed circuit board 230 in the preset direction D1 can be reduced, which facilitates miniaturization of the size of the battery assembly 10 in the preset direction D1. On the other hand, when the size of the battery assembly 10 in the preset direction D1 is constant, one of the first surface 230a and the second surface 230b of the printed circuit board 230 faces the end surface 100a, so that the size of the battery cell 100 in the preset direction D1 is longer, which is beneficial to improving the capacity of the battery assembly 10.

[0058] It is understood that in another embodiment, the predetermined direction D1 is the width direction of the battery cell 100. When the predetermined direction D1 is the width direction of the battery cell 100, the arrangement direction of the bottom surface 100b and the end surface 100a is the width direction of the battery cell 100. Generally speaking, the thickness of the printed circuit board 230 is less than its width, and the thickness of the printed circuit board 230 is less than its length. The printed circuit board 230 has a first surface 230a and a second surface 230b disposed opposite to each other in the thickness direction, with one of the first surface 230a and the second surface 230b facing the end surface 100a. If the size of the battery cell 100 along the predetermined direction D1 is constant, the sum of the dimensions of the battery cell 100 and the printed circuit board 230 in the predetermined direction D1 can be reduced, which facilitates miniaturization of the battery assembly 10 in the predetermined direction D1. On the other hand, when the size of the battery assembly 10 in the preset direction D1 is constant, one of the first surface 230a and the second surface 230b of the printed circuit board 230 faces the end surface 100a, so that the size of the battery cell 100 in the preset direction D1 is longer, which is beneficial to improving the capacity of the battery assembly 10.

[0059] In one embodiment, the protection circuit 240 includes a plurality of electronic components. The plurality of electronic components are disposed on at least one of the first surface 230a and the second surface 230b of the printed circuit board 230. In this embodiment, a portion of the plurality of electronic components is disposed on the first surface 230a of the printed circuit board 230, while another portion of the plurality of electronic components is disposed on the second surface 230b. Compared to a case where the plurality of electronic components of the protection circuit 240 are disposed on either the first surface 230a or the second surface 230b, when a portion of the plurality of electronic components of the protection circuit 240 is disposed on the first surface 230a of the printed circuit board 230 and another portion of the plurality of electronic components is disposed on the second surface 230b, both the first surface 230a and the second surface 230b of the printed circuit board 230 can be fully utilized, thereby reducing the size of the printed circuit board 230.

[0060] See also Figure 1 and Figure 5 ,and Figure 2 and Figure 6 , Figure 5 A schematic diagram of a battery assembly provided in another embodiment of the present application; Figure 6 for Figure 5In this embodiment, the battery assembly 10 further includes a fixing member 300, and the fixing member 300 fixes the printed circuit board 230 and the battery cell 100.

[0061] The fixing member 300 may be made of, but is not limited to, plastic. In one embodiment, the printed circuit board 230 and the battery cell 100 may be fixed together using an injection molding process. The battery assembly 10 provided in the embodiments of the present application further includes a fixing member 300. The fixing member 300 secures the printed circuit board 230 and the battery cell 100, preventing the printed circuit board 230 from opening relative to the battery cell 100, thereby making the battery assembly 10 more compact.

[0062] Furthermore, in one embodiment, the fixing member 300 wraps a portion of the battery cell 100 and at least a portion of the printed circuit board 230 .

[0063] Furthermore, the fixing member 300 seals and connects at least a portion of the printed circuit board 230 to the battery cell 100. For example, when the printed circuit board 230 and the battery cell 100 are fixed together via an injection molding process, the fixing member 300 not only secures the printed circuit board 230 and the battery cell 100 but also wraps around portions of the battery cell 100 and at least a portion of the printed circuit board 230, thereby sealing the printed circuit board 230. This not only further strengthens the connection between the printed circuit board 230 and the battery cell 100, but also reduces or even prevents the ingress of dust or water into the printed circuit board 230 or the electronic components of the protection circuit 240, thereby extending the service life of the protection circuit 240.

[0064] It is understandable that in other embodiments, the fixing member 300 may not wrap the battery cell 100, or the fixing member 300 may not include the printed circuit board 230. As long as the fixing member 300 can fix the printed circuit board 230 and the battery cell 100, it will be sufficient.

[0065] Next, the various forms of the battery assembly 10 provided in the embodiments of the present application are described in detail. It should be noted that the schematic diagrams of the battery assembly 10 provided in the various embodiments of the present application (such as the first embodiment to the fourteenth embodiment) are intended to illustrate the number of first polarity tabs 110, the number of second polarity tabs 120, the number of first connectors 210, the number of second connectors 220, the connection relationship between the first polarity tabs 110 and the first connector 210, and the connection relationship between the second polarity tabs 120 and the second connector 220. The sizes of the various components in the schematic diagrams of the battery assembly 10 provided in the various embodiments of the present application (such as the first embodiment to the fourteenth embodiment) should not be understood as the sizes of the components of the actual product, and the size ratio between any two related components should not be understood as the size ratio of the actual battery assembly 10.

[0066] Please also refer to Figure 7 and Figure 8 , Figure 7 A schematic diagram of a battery assembly provided in the first embodiment of the present application; Figure 8 Schematic diagram of a battery assembly provided in a second embodiment of the present application. In this embodiment, the protection plate assembly 200 includes a first connector 210 and a second connector 220. The battery cell 100 includes two adjacent and spaced-apart first polarity tabs 110 and two adjacent and spaced-apart second polarity tabs 120. The two first polarity tabs 110 are electrically connected to the same first connector 210. The two second polarity tabs 120 are disposed on one side of the two first polarity tabs 110 and are electrically connected to the same second connector 220.

[0067] exist Figure 7 In the example, the first polarity is positive, that is, the first polarity tab 110 is a positive tab; and the second polarity is negative, that is, the second polarity tab 120 is a negative tab. Figure 7 In the battery assembly 10 shown, the two first polarity tabs 110 are electrically connected to the same first connector 210, and the two second polarity tabs 120 are electrically connected to the same second connector 220. Figure 7 In the battery assembly 10 shown, the protection circuit 240 is connected between the two second polarity tabs 120 and the second connector 220 , that is, the protection circuit 240 is connected between the two negative electrode tabs and the second connector 220 .

[0068] exist Figure 8 In the example, the first polarity is positive, that is, the first polarity tab 110 is a positive tab; and the second polarity is negative, that is, the second polarity tab 120 is a negative tab. Figure 8 In the battery assembly 10 shown, the two first polarity tabs 110 are electrically connected to the same first connector 210, and the two second polarity tabs 120 are electrically connected to the same second connector 220. Figure 8 In the battery assembly 10 shown, the protection circuit 240 is connected between the two first polarity tabs 110 and the first connector 210 , that is, the protection circuit 240 is connected between the two positive tabs and the second connector 220 .

[0069] In this embodiment, the two first polarity tabs 110 are disposed on one side of the two second polarity tabs 120. Therefore, the two first polarity tabs 110 are relatively close to each other. When the two first polarity tabs 110 are electrically connected to the same first connector 210, a relatively short wire (also referred to as a conductive wire) can be used to connect to the first connector 210. This allows the two first polarity tabs 110 to be electrically connected to the same first connector 210 using a shorter wire and lower wire resistance.

[0070] Accordingly, in the battery assembly 10 provided in the embodiment of the present application, the two second polarity tabs 120 are disposed on one side of the two first polarity tabs 110. Therefore, the distance between the two second polarity tabs 120 is relatively close. When the two second polarity tabs 120 are electrically connected to the same second connector 220, they can be connected to the same second connector 220 using a relatively short wire. This allows the two second polarity tabs 120 to be electrically connected to the same second connector 220 with a shorter wire and lower wire resistance.

[0071] In the battery assembly 10 provided in the embodiment of the present application, the battery cell 100 includes two first polarity tabs 110 disposed adjacently and spaced apart, and two second polarity tabs 120 disposed adjacently and spaced apart. The two second polarity tabs 120 are disposed on one side of the two first polarity tabs 110. The first connector 210 is electrically connected to the two first polarity tabs 110, and the second connector 220 is electrically connected to the two second polarity tabs 120; however, the first connector 210 is not electrically connected to the second polarity tab 120, and the second connector 220 is not electrically connected to the first polarity tab 110. Therefore, a shorter wire is required to achieve electrical connection between the two first polarity tabs 110 and the first connector 210. Correspondingly, a shorter wire is required to achieve electrical connection between the two second polarity tabs 120 and the second connector 220. It can be seen that in the battery assembly 10 provided in the embodiment of the present application, the first connector 210 is used to be electrically connected to the two first polarity pole ears 110, and the second connector 220 is used to be electrically connected to the two second polarity pole ears 120, and the two second polarity pole ears 120 are arranged on one side of the two first polarity pole ears 110, so that the line resistance of the protection plate assembly 200 can be smaller.

[0072] Furthermore, as can be seen from the above description, the protection circuit 240 is located on the printed circuit board 230, and the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210; or, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220. Specifically, in this embodiment, please refer to Figure 8 , the protection circuit 240 is electrically connected between the two first polarity tabs 110 and the first connector 210; or, refer to Figure 7, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220. In other words, the protection circuit 240 is located in the path between the two first polarity tabs 110 and the first connector 210 (named as the first path); or the protection circuit 240 is located in the path between the two second polarity tabs 120 and the second connector 220 (named as the second path). Therefore, the protection circuit 240 of the battery assembly 10 of the present application is located in a single path, and therefore, the protection circuit 240 is also called a single conductive loop. When the protection circuit 240 is located in the first path, the second polarity tab 120 and the second connector 220 do not need to be set up with complex connection lines to connect to the protection circuit 240; when the protection circuit 240 is located in the second path, the first polarity tab 110 and the first connector 210 do not need to be set up with complex connection lines to connect to the protection circuit 240, thereby further reducing the line resistance of the protection board assembly 200.

[0073] Please see further Figure 7 If the protection circuit 240 is electrically connected between the two second polarity tabs 120 and the second connector 220 , the two first polarity tabs 110 are connected to be electrically connected, and the two first polarity tabs 110 are electrically connected to the first connector 210 through the same wire.

[0074] In this embodiment, the two first polarity tabs 110 are disposed on one side of the second polarity tab 120. Therefore, the two first polarity tabs 110 are relatively close to each other. The two first polarity tabs 110 are connected together to achieve electrical connection, and then connected to the first connector 210 via the same wire. In this way, when the two first polarity tabs 110 are electrically connected to the same first connector 210, the required wire is shorter and the line resistance is smaller.

[0075] In one embodiment, when the two first polarity tabs 110 are connected together, they can be connected together through a connector and then electrically connected to the first connector 210 through a flexible circuit board. The connector can be, but is not limited to, a solder pad, a connecting wire of a protective plate, etc. As can be seen, compared to each first polarity tab 110 being electrically connected to the first connector 210 using a separate wire, the battery assembly 10 provided in the embodiment of the present application, the two first polarity tabs 110 are electrically connected to the first connector 210 through the same wire, thereby reducing the line resistance between the two first polarity tabs 110 and the first connector 210, and making the wire layout between the two first polarity tabs 110 and the first connector 210 relatively simple.

[0076] Accordingly, please continue to see Figure 7The two second polarity tabs 120 are connected together and then electrically connected to the second connector 220 via the protection circuit 240. The protection circuit 240 is located on the printed circuit board 230. When the protection circuit 240 is electrically connected to the second connector 220, the printed circuit board 230 and the second connector 220 can be electrically connected via a wire. Thus, compared to each second polarity tab 120 being electrically connected to the second connector 220 using a separate wire, the battery assembly 10 provided in the embodiment of the present application, in which the two second polarity tabs 120 are connected together and then electrically connected to the second connector 220 via the protection circuit 240, can reduce the line resistance between the two second polarity tabs 120 and the second connector 220, and the wire layout between the two second polarity tabs 120 and the second connector 220 is relatively simple.

[0077] In this implementation, see Figure 8 If the protection circuit 240 is electrically connected between the two first polarity tabs 110 and the first connector 210 , the two second polarity tabs 120 are connected to be electrically connected, and the two second polarity tabs 120 are electrically connected to the second connector 220 through the same wire.

[0078] In this embodiment, the two second polarity electrodes are disposed on one side of the two first polarity electrodes, so the two second polarity tabs 120 are relatively close to each other. The two second polarity tabs 120 are connected together to achieve electrical connection, and then electrically connected to the second connector 220 via the same wire. This allows the two second polarity tabs 120 to be electrically connected to the same second connector 220 with a shorter wire and lower wire resistance.

[0079] In one embodiment, when the two second polarity tabs 120 are connected together, they can be connected together through a connector and then electrically connected to the second connector 220 through a flexible circuit board. The connector can be, but is not limited to, a solder pad, a connecting wire of a protective plate, etc. As can be seen, compared to each second polarity tab 120 being electrically connected to the second connector 220 using a separate wire, the battery assembly 10 provided in the embodiment of the present application has the two second polarity tabs 120 electrically connected to the second connector 220 via the same wire, thereby reducing the line resistance between the two second polarity tabs 120 and the second connector 220 and making the wire layout between the two second polarity tabs 120 and the second connector 220 relatively simple.

[0080] Accordingly, please continue to see Figure 8, the two first polarity tabs 110 are connected together and then electrically connected to the first connector 210 through the protection circuit 240. The protection circuit 240 is located on the printed circuit board 230. When the protection circuit 240 is electrically connected to the first connector 210, the printed circuit board 230 and the first connector 210 can be electrically connected by a wire. As can be seen, compared to each first polarity tab 110 being electrically connected to the first connector 210 using a separate wire, the battery assembly 10 provided in the embodiment of the present application, in which the two first polarity tabs 110 are connected together and then electrically connected to the first connector 210 through the protection circuit 240, can reduce the line resistance between the two first polarity tabs 110 and the first connector 210, and the wire layout between the two first polarity tabs 110 and the first connector 210 is relatively simple.

[0081] Please also refer to Figure 9 and Figure 10 , Figure 9 A schematic diagram of a battery assembly provided in a third embodiment of the present application; Figure 10 This is a schematic diagram of a battery assembly provided in the fourth embodiment of the present application. Figure 9 and Figure 10 In the corresponding embodiment, the protection plate assembly 200 includes a first connector 210 and a second connector 220. Accordingly, the battery cell 100 includes a first polarity tab 110 and a second polarity electrode. The first polarity tab 110 is electrically connected to the first connector 210. The second polarity tab 120 is electrically connected to the second connector 220.

[0082] exist Figure 9 and Figure 10 In the example, the first polarity is positive, that is, the first polarity tab 110 is the positive tab; and the second polarity is negative, that is, the second polarity tab 120 is the negative tab. It can be understood that, Figure 9 and Figure 10 It is also applicable to the embodiment in which the first polarity is negative, that is, the first polarity tab 110 is a negative tab; and the second polarity is positive, and the second polarity tab 120 is a positive tab. As can be seen from the above description, the protection circuit 240 is located on the printed circuit board 230, and the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210; or, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220. Figure 10 In the embodiment, the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210. Figure 9In the embodiment, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220 .

[0083] In the battery assembly 10 provided in the embodiment of the present application, the battery cell 100 includes a first polarity tab 110 and a second polarity electrode, and the protective plate assembly 200 includes a first connector 210 and a second connector 220. The first connector 210 is electrically connected to the first polarity tab 110, and the second connector 220 is electrically connected to the second polarity tab 120. However, the first connector 210 is not electrically connected to the second polarity tab 120, and the second connector 220 is not electrically connected to the first polarity tab 110. Therefore, a relatively short conductive wire can be provided in the protective plate assembly 200 to electrically connect the first polarity tab 110 and the first connector 210. Correspondingly, a relatively short conductive wire can be provided in the protective plate assembly 200 to electrically connect the second polarity tab 120 and the second connector 220. It can be seen that in the battery assembly 10 provided in the embodiment of the present application, the first connector 210 is used to electrically connect to the first polarity tab 110, and the second connector 220 is used to electrically connect to the second polarity tab 120, thereby making the line resistance of the protection plate assembly 200 smaller.

[0084] Furthermore, the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210; or, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220. In other words, the protection circuit 240 is located in the path between the first polarity tab 110 and the first connector 210 (named as the first path); or, the protection circuit 240 is located in the path between the second polarity tab 120 and the second connector 220 (named as the second path). Therefore, the protection circuit 240 of the battery assembly 10 of the present application is located in a single path, and therefore, the protection circuit 240 is also called a single conductive loop. When the protection circuit 240 is located in the first path, the second polarity tab 120 and the second connector 220 do not need to be set up with complex connection lines to connect to the protection circuit 240; when the protection circuit 240 is located in the second path, the first polarity tab 110 and the first connector 210 do not need to be set up with complex connection lines to connect to the protection circuit 240, thereby further reducing the line resistance of the protection board assembly 200.

[0085] Please also refer to Figure 11 、 Figure 12 、 Figure 13 and Figure 14 , Figure 11 A schematic diagram of a battery assembly provided in a fifth embodiment of the present application; Figure 12A schematic diagram of a battery assembly provided in a sixth embodiment of the present application; Figure 13 A schematic diagram of a battery assembly provided in a seventh embodiment of the present application; Figure 14 Schematic diagram of a battery assembly provided in the eighth embodiment of the present application. The protective plate assembly 200 includes a first connector 210 and a second connector 220. The battery cell 100 includes a first polarity tab 110 and two second polarity tabs 120 disposed adjacently and spaced apart. The first polarity tab 110 is electrically connected to the first connector 210. The two second polarity tabs 120 are disposed on the same side of the first polarity tab 110 and are electrically connected to the same second connector 220.

[0086] In this embodiment, the first polarity is the positive electrode and the second polarity is the negative electrode. For the corresponding battery assembly 10, please refer to Figure 11 and Figure 12 As can be seen from the above description, the protection circuit 240 is located on the printed circuit board 230, and the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210; or, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220. Therefore, when the protection circuit 240 is located between the second polarity tab 120 and the second connector 220, please refer to Figure 11 When the protection circuit 240 is located between the first polarity tab 110 and the first connector 210, refer to Figure 12 The battery assembly 10 is shown.

[0087] exist Figure 11 and Figure 12 In the embodiment, the first connector 210 is electrically connected to the first polarity tab 110, and the second connector 220 is electrically connected to the two second polarity tabs 120; however, the first connector 210 is not electrically connected to the second polarity tab 120, and the second connector 220 is not electrically connected to the first polarity tab 110. Therefore, a shorter conductive wire can be provided in the protection board assembly 200 to electrically connect the first polarity tab 110 and the first connector 210. Correspondingly, a shorter conductive wire can be provided in the protection board assembly 200 to electrically connect the second polarity tab 120 and the second connector 220. It can be seen from this that in the battery assembly 10 provided in the embodiment of the present application, the first connector 210 is used to electrically connect to the first polarity tab 110, and the second connector 220 is used to electrically connect to the two second polarity tabs 120, thereby reducing the line resistance of the protection board assembly 200.

[0088] In addition, the two second polarity tabs 120 are disposed on the same side of the first polarity tab 110. Therefore, the two second polarity tabs 120 are relatively close to each other. The two second polarity tabs 120 are connected together to achieve electrical connection, and then electrically connected to the second connector 220 via the same wire. In this way, when the two second polarity tabs 120 are electrically connected to the same second connector 220, the required wire is shorter and the line resistance is reduced.

[0089] Furthermore, the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210 (see Figure 12 ); or, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220 (see Figure 11 ), in other words, the protection circuit 240 is located in the path between the first polarity tab 110 and the first connector 210 (named as the first path); or the protection circuit 240 is located in the path between the second polarity tab 120 and the second connector 220 (named as the second path). Therefore, the protection circuit 240 of the battery assembly 10 of the present application is located in a single path, and therefore, the protection circuit 240 is also called a single conductive loop. When the protection circuit 240 is located in the first path, the second polarity tab 120 and the second connector 220 do not need to be provided with complex connection lines to connect to the protection circuit 240; when the protection circuit 240 is located in the second path, the first polarity tab 110 and the first connector 210 do not need to be provided with complex connection lines to connect to the protection circuit 240, thereby further reducing the line resistance of the protection board assembly 200.

[0090] When the first polarity is negative and the second polarity is positive, the corresponding battery assembly 10 is shown in FIG. Figure 13 and Figure 14 As can be seen from the above description, the protection circuit 240 is located on the printed circuit board 230, and the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210; or, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220. Therefore, when the protection circuit 240 is located between the second polarity tab 120 and the second connector 220, please refer to Figure 13 When the protection circuit 240 is located between the first polarity tab 110 and the first connector 210, refer to Figure 14 The battery assembly 10 is shown.

[0091] exist Figure 13 and Figure 14In the embodiment, the first connector 210 is electrically connected to the first polarity tab 110, and the second connector 220 is electrically connected to the two second polarity tabs 120; however, the first connector 210 is not electrically connected to the second polarity tab 120, and the second connector 220 is not electrically connected to the first polarity tab 110. Therefore, a shorter conductive wire can be provided in the protection board assembly 200 to electrically connect the first polarity tab 110 and the first connector 210. Correspondingly, a shorter conductive wire can be provided in the protection board assembly 200 to electrically connect the second polarity tab 120 and the second connector 220. It can be seen from this that in the battery assembly 10 provided in the embodiment of the present application, the first connector 210 is used to electrically connect to the first polarity tab 110, and the second connector 220 is used to electrically connect to the two second polarity tabs 120, thereby reducing the line resistance of the protection board assembly 200.

[0092] In addition, Figure 13 and Figure 14 In the embodiment, the two second polarity tabs 120 are disposed on the same side of the first polarity tab 110. Therefore, the two second polarity tabs 120 are relatively close to each other. The two second polarity tabs 120 are connected together to achieve electrical connection, and then electrically connected to the second connector 220 via the same wire. In this way, when the two second polarity tabs 120 are electrically connected to the same second connector 220, the required wire is shorter and the wire resistance is reduced.

[0093] Furthermore, the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210 (see Figure 13 ); or, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220 (see Figure 14 ), in other words, the protection circuit 240 is located in the path between the first polarity tab 110 and the first connector 210 (named as the first path); or the protection circuit 240 is located in the path between the second polarity tab 120 and the second connector 220 (named as the second path). Therefore, the protection circuit 240 of the battery assembly 10 of the present application is located in a single path, and therefore, the protection circuit 240 is also called a single conductive loop. When the protection circuit 240 is located in the first path, the second polarity tab 120 and the second connector 220 do not need to be provided with complex connection lines to connect to the protection circuit 240; when the protection circuit 240 is located in the second path, the first polarity tab 110 and the first connector 210 do not need to be provided with complex connection lines to connect to the protection circuit 240, thereby further reducing the line resistance of the protection board assembly 200.

[0094] See also Figure 15 and Figure 16 , Figure 15 A schematic diagram of a battery assembly provided in a ninth embodiment of the present application; Figure 16 Schematic diagram of a battery assembly provided in the tenth embodiment of the present application. The protection plate assembly 200 includes two first connectors 210 and one second connector 220. The battery cell 100 includes two first polarity tabs 110 disposed adjacently and spaced apart and two second polarity tabs 120 disposed adjacently and spaced apart. The two first polarity tabs 110 are electrically connected, and the two first polarity tabs 110 are electrically connected to one of the two first connectors 210 via a first wire 271, and the two first polarity tabs 110 are electrically connected to the other of the two first connectors 210 via a second wire 272. The two second polarity tabs 120 are disposed on one side of the two first polarity tabs 110, and the two second polarity tabs 120 are electrically connected to the same second connector 220.

[0095] In this embodiment, the first polarity is the positive pole and the second polarity is the negative pole. As can be seen from the above description, the protection circuit 240 is located on the printed circuit board 230, and the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210; or, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220. Therefore, when the protection circuit 240 is located between the second polarity tab 120 and the second connector 220, please refer to Figure 15 When the protection circuit 240 is located between the first polarity tab 110 and the first connector 210, refer to Figure 16 The battery assembly 10 shown. It is understood that if the first polarity is negative, the second polarity is positive. As previously described, the protection circuit 240 is located on the printed circuit board 230, and the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210; alternatively, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220. Therefore, the protection circuit 240 is located between the two positive tabs and the connector connected to them; alternatively, the protection circuit 240 is located between the two negative tabs and the connector connected to them.

[0096] The two first polarity tabs 110 are electrically connected, and the two first polarity tabs 110 are electrically connected to one of the two first connectors 210 via a first wire 271. The two first polarity tabs 110 are electrically connected to the other of the two first connectors 210 via a second wire 272. The second connector 220 is electrically connected to the two second polarity tabs 120. However, the first connector 210 is not electrically connected to the second polarity tabs 120, and the second connector 220 is not electrically connected to the first polarity tab 110. Therefore, a shorter first wire 271 can be provided in the protection plate assembly 200 to electrically connect the two first polarity tabs 110 to one of the two first connectors 210, and a shorter second wire 272 can be provided to electrically connect the two first polarity tabs 110 to the other of the two first connectors 210. Accordingly, a shorter conductive wire can be provided in the protection plate assembly 200 to electrically connect the second polarity tabs 120 and the second connector 220. It can be seen that the two first polarity tabs 110 of the battery assembly 10 provided in the embodiment of the present application are electrically connected, and the two first polarity tabs 110 are electrically connected to one of the two first connectors 210 through the first wire 271, and the two first polarity tabs 110 are electrically connected to the other of the two first connectors 210 through the second wire 272, and the second connector 220 is used to be electrically connected to the two second polarity tabs 120, so that the line resistance of the protection plate assembly 200 can be smaller.

[0097] In addition, the battery assembly 10 provided in the embodiment of the present application includes two first connectors 210 and one second connector 220, thereby facilitating the use of the battery assembly 10 in the electronic device 1. For example, when the battery assembly 10 is used in the electronic device 1 to power an electrical device in the electronic device 1, the electrical device can be electrically connected to any one of the two first connectors 210 and the second connector 220, thereby facilitating the electrical connection between the electrical device and the battery assembly 10.

[0098] In addition, the two second polarity tabs 120 are disposed on the same side of the first polarity tab 110. Therefore, the two second polarity tabs 120 are relatively close to each other. The two second polarity tabs 120 are connected together to achieve electrical connection, and then electrically connected to the second connector 220 via the same wire. In this way, when the two second polarity tabs 120 are electrically connected to the same second connector 220, the required wire is shorter and the line resistance is reduced.

[0099] Furthermore, the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210 (see Figure 16); or, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220 (see Figure 15 ), in other words, the protection circuit 240 is located in the path between the first polarity tab 110 and the first connector 210 (named as the first path); or the protection circuit 240 is located in the path between the second polarity tab 120 and the second connector 220 (named as the second path). Therefore, the protection circuit 240 of the battery assembly 10 of the present application is located in a single path, and therefore, the protection circuit 240 is also called a single conductive loop. When the protection circuit 240 is located in the first path, the second polarity tab 120 and the second connector 220 do not need to be provided with complex connection lines to connect to the protection circuit 240; when the protection circuit 240 is located in the second path, the first polarity tab 110 and the first connector 210 do not need to be provided with complex connection lines to connect to the protection circuit 240, thereby further reducing the line resistance of the protection board assembly 200.

[0100] See also Figure 17 and Figure 18 , Figure 17 A schematic diagram of a battery assembly provided in the eleventh embodiment of the present application; Figure 18 A schematic diagram of a battery assembly provided in the twelfth embodiment of the present application. In this embodiment, the protection plate assembly 200 includes two first connectors 210 and two second connectors 220. The battery cell 100 includes two first polarity tabs 110 disposed adjacently and spaced apart and two second polarity tabs 120 disposed adjacently and spaced apart. The two first polarity tabs 110 are electrically connected, and the two first polarity tabs 110 are electrically connected to one of the two first connectors 210 via a first wire 271, and the two first polarity tabs 110 are electrically connected to the other of the two first connectors 210 via a second wire 272. The two second polarity tabs 120 are electrically connected, and the two second polarity tabs 120 are disposed on one side of the two first polarity tabs 110. The two second polarity tabs 120 are electrically connected to one of the two second connectors 220 via a third wire 273, and the two second polarity tabs 120 are electrically connected to the other of the two second connectors 220 via a fourth wire 274.

[0101] In this embodiment, the first polarity is taken as the positive pole and the second polarity is taken as the negative pole. Figure 17 and Figure 18This also applies to the case where the first polarity is negative and the second polarity is positive. As described above, the protection circuit 240 is located on the printed circuit board 230, and the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210; or, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220. Therefore, in this embodiment, when the protection circuit 240 is located between the second polarity tab 120 and the second connector 220, please refer to Figure 17 When the protection circuit 240 is located between the first polarity tab 110 and the first connector 210, refer to Figure 18 The battery assembly 10 is shown.

[0102] The two first polarity tabs 110 are electrically connected, and the two first polarity tabs 110 are electrically connected to one of the two first connectors 210 through a first wire 271, the two first polarity tabs 110 are electrically connected to the other of the two first connectors 210 through a second wire 272, and the second connector 220 is electrically connected to the two second polarity tabs 120; the two second polarity tabs 120 are electrically connected to one of the two second connectors 220 through a third wire 273, and the two second polarity tabs 120 are electrically connected to the other of the two second connectors 220 through a fourth wire 274; the first connector 210 is not electrically connected to the second polarity tab 120, and the second connector 220 is not electrically connected to the first polarity tab 110. Therefore, a shorter first wire 271 can be provided in the protection plate assembly 200 to electrically connect the two first polarity tabs 110 to one of the two first connectors 210, and a shorter second wire 272 can be provided to electrically connect the two first polarity tabs 110 to the other of the two first connectors 210. Correspondingly, a shorter third wire 273 can be provided in the protection plate assembly 200 to electrically connect the two second polarity tabs 120 to one of the two second connectors 220, and a shorter fourth wire 274 can be provided to electrically connect the two second polarity tabs 120 to the other of the two second connectors 220. It can be seen that in the battery assembly 10 provided in the embodiment of the present application, the two first polarity tabs 110 are electrically connected to one of the two first connectors 210 through the first wire 271, and the two first polarity tabs 110 are electrically connected to the other of the two first connectors 210 through the second wire 272; the two second polarity tabs 120 are electrically connected to one of the two second connectors 220 through the third wire 273, and the two second polarity tabs 120 are electrically connected to the other of the two second connectors 220 through the fourth wire 274, so that the line resistance of the protection plate assembly 200 can be made smaller.

[0103] In addition, the battery assembly 10 provided in the embodiment of the present application includes two first connectors 210 and two second connectors 220, thereby facilitating the application of the battery assembly 10 in the electronic device 1. For example, when the battery assembly 10 is used in the electronic device 1 to power an electrical device in the electronic device 1, the electrical device can be electrically connected to any one of the two first connectors 210 and any one of the two second connectors 220, thereby facilitating the electrical connection between the electrical device and the battery assembly 10.

[0104] In addition, the two second polarity tabs 120 are disposed on the same side of the two first polarity tabs 110. Therefore, the two second polarity tabs 120 are closer together. The connector required to connect the two second polarity tabs 120 is shorter, and the line resistance of the connector connecting the two second polarity tabs 120 is smaller.

[0105] Furthermore, the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210 (see Figure 18 ); or, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220 (see Figure 17 ), in other words, the protection circuit 240 is located in the path between the first polarity tab 110 and the first connector 210 (named as the first path); or the protection circuit 240 is located in the path between the second polarity tab 120 and the second connector 220 (named as the second path). Therefore, the protection circuit 240 of the battery assembly 10 of the present application is located in a single path, and therefore, the protection circuit 240 is also called a single conductive loop. When the protection circuit 240 is located in the first path, the second polarity tab 120 and the second connector 220 do not need to be provided with complex connection lines to connect to the protection circuit 240; when the protection circuit 240 is located in the second path, the first polarity tab 110 and the first connector 210 do not need to be provided with complex connection lines to connect to the protection circuit 240, thereby further reducing the line resistance of the protection board assembly 200.

[0106] See also Figure 19 and Figure 20 , Figure 19 A schematic diagram of a battery assembly provided in the thirteenth embodiment of the present application; Figure 20 A schematic diagram of a battery assembly provided for the fourteenth embodiment of the present application. The battery cell 100 includes two sub-cells 11. Each sub-cell 11 includes a positive electrode tab and a negative electrode tab, and the positive electrode tab of one of the two sub-cells 11 serves as one of the first polarity tab 110 and the second polarity tab 120. The positive electrode tab of the other of the two sub-cells 11 is arranged adjacent to and electrically connected to the negative electrode tab of the one of the two sub-cells 11, and the negative electrode tab of the other of the two sub-cells 11 serves as the other of the first polarity tab 110 and the second polarity tab 120. The protective plate assembly 200 includes a first connector 210 and a second connector 220, the first connector 210 is electrically connected to the first polarity tab 110, and the second connector 220 is electrically connected to the second polarity tab 120.

[0107] In this embodiment, for the convenience of describing the two sub-cells 11, the two sub-cells 11 are respectively labeled as sub-cell 11a and sub-cell 11b. In the schematic diagram of this embodiment, sub-cell 11a is the sub-cell 11 located on the left side of the diagram, and sub-cell 11b is the sub-cell 11 located on the right side of the diagram.

[0108] In this embodiment, the positive electrode of one of the two sub-cells 11 (sub-cell 11a) serves as the first polarity tab 110 of the battery cell 100, and the negative electrode of the other of the two sub-cells 11 (sub-cell 11b) serves as the second polarity tab 120 of the battery cell 100. This is understood not to limit the embodiments of the present application.

[0109] The positive electrode tab of one of the two sub-cells 11 serves as one of the first polarity tab 110 and the second polarity tab 120, and the negative electrode tab of the other of the two sub-cells 11 serves as the other of the first polarity tab 110 and the second polarity tab 120. The protection board assembly 200 includes a first connector 210 and a second connector 220. The first connector 210 is electrically connected to the first polarity tab 110, and the second connector 220 is electrically connected to the second polarity tab 120. The first connector 210 is not electrically connected to the second polarity tab 120, and the second connector 220 is not electrically connected to the first polarity tab 110. Therefore, a relatively short wire can be provided in the protection board assembly 200 to electrically connect the first connector 210 and the first polarity tab 110, and a relatively short wire can be provided in the protection board assembly 200 to electrically connect the second connector 220 and the second polarity tab 120, thereby reducing the line resistance of the protection board assembly 200.

[0110] Furthermore, the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210; or, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220. In other words, the protection circuit 240 is located in the path between the first polarity tab 110 and the first connector 210 (named as the first path); or, the protection circuit 240 is located in the path between the second polarity tab 120 and the second connector 220 (named as the second path). Therefore, the protection circuit 240 of the battery assembly 10 of the present application is located in a single path, and therefore, the protection circuit 240 is also called a single conductive loop. When the protection circuit 240 is located in the first path, the second polarity tab 120 and the second connector 220 do not need to be set up with complex connection lines to connect to the protection circuit 240; when the protection circuit 240 is located in the second path, the first polarity tab 110 and the first connector 210 do not need to be set up with complex connection lines to connect to the protection circuit 240, thereby further reducing the line resistance of the protection board assembly 200.

[0111] In this embodiment, the positive electrode tab of the other of the two sub-cells 11 is adjacent to and electrically connected to the negative electrode tab of the first of the two sub-cells 11, thereby reducing the line resistance when the positive electrode tab of the other of the two sub-cells 11 is electrically connected to the negative electrode tab of the first of the two sub-cells 11. In addition, the battery cell 100 provided in this embodiment of the application includes two sub-cells 11, thereby enabling the battery cell 100 to have a larger capacity.

[0112] Further, see Figure 1 、 Figure 2 The protection plate assembly 200 further includes a first flexible circuit board 250 and a second flexible circuit board 260. The first connector 210 is electrically connected to the printed circuit board 230 via the first flexible circuit board 250, and the printed circuit board 230 is electrically connected to the first polarity tab 110. The second connector 220 is electrically connected to the printed circuit board 230 via the second flexible circuit board 260, and the printed circuit board 230 is electrically connected to the second polarity tab 120.

[0113] The first connector 210 is electrically connected to the printed circuit board 230 via the first flexible circuit board 250. The first flexible circuit board 250 is relatively flexible. When the battery assembly 10 is used in the electronic device 1, the first flexible circuit board 250 can be placed according to the space in the electronic device 1 and the location of the electrical components that need to be connected to the battery assembly 10, thereby facilitating the installation of the battery assembly 10 in the electronic device 1. Correspondingly, the second connector 220 is electrically connected to the printed circuit board 230 via the second flexible circuit board 260. The second flexible circuit board 260 is relatively flexible. When the battery assembly 10 is used in the electronic device 1, the second flexible circuit board 260 can be placed according to the space in the electronic device 1 and the location of the electrical components that need to be connected to the battery assembly 10, thereby facilitating the installation of the battery assembly 10 in the electronic device 1.

[0114] See also Figure 5 、 Figure 21 and Figure 22 , Figure 21 A schematic diagram of a battery assembly provided in one embodiment of the present application; Figure 22 for Figure 21 Schematic diagram of another perspective of the battery assembly shown in. Compared to Figure 5 In the illustrated battery assembly 10, in this embodiment, the battery assembly 10 further includes at least one of a packaging film 500 and an easy-tear paper 600. When the battery assembly 10 further includes the packaging film 500, the packaging film 500 is wrapped around the battery cell 100 to encapsulate the battery cell 100, with the first polarity tab 110 and the second polarity tab 120 exposed from the packaging film 500. When the battery assembly 10 further includes the easy-tear paper 600, the easy-tear paper 600 is disposed on the outside of the battery cell 100 to facilitate removal of the battery assembly 10 from the electronic device 1 in which the battery assembly 10 is used.

[0115] In the schematic diagram of this embodiment, the battery assembly 10 including the packaging film 500 and the easy-tear paper 600 is taken as an example for illustration. It can be understood that this should not be understood as a limitation on the battery assembly 10 provided in the embodiment of the present application.

[0116] In the battery assembly 10 provided in the embodiment of the present application, the packaging film 500 packages and encapsulates the battery cell 100. The packaging film 500 may also be referred to as a battery packaging sticker.

[0117] The easy-tear paper 600, also known as an easy-tear sticker, is disposed on the outside of the battery cell 100. When the battery assembly 10 is installed in the electronic device 1, the easy-tear paper 600 is used to allow a user to remove the battery assembly 10 from the electronic device 1 in which the battery assembly 10 is installed.

[0118] In one embodiment, the tear-off paper 600 is partially fixed to the outside of the battery cell 100, and the other part of the tear-off paper 600 is not fixed to the battery cell 100. For example, the tear-off paper 600 includes a fixing portion and a gripping portion. The fixing portion is fixed to the outside of the battery cell 100, and the gripping portion is connected to the fixing portion, and the gripping portion is used for a user to grip. When the battery assembly 10 is installed in the electronic device 1, the gripping portion of the tear-off paper 600 is used for the user to remove the battery assembly 10 from the electronic device 1 in which the battery assembly 10 is used.

[0119] See also Figure 23 and Figure 24 , Figure 23 A schematic diagram of a protection circuit for a battery assembly provided in one embodiment of the present application; Figure 24 A schematic diagram of a protection circuit for a battery pack according to another embodiment of the present application. The protection circuit 240 in the battery pack 10 according to the embodiment of the present application is combined with the protection circuit 240 to Figure 7 The battery assembly 10 provided in the first embodiment is used as an example for illustration. It can be understood that it should not be understood as a limitation on the protection circuit 240 provided in the embodiment of the present application. The protection circuit 240 can be combined with the battery assembly 10 provided in any of the previous embodiments.

[0120] For the sake of convenience, the tab connected to the protection circuit 240 is named the target tab, and the connector connected to the protection circuit 240 is named the target connector; the tab not connected to the protection circuit 240 is named the non-target tab, and the connector connected to the protection circuit 240 is named the non-target connector.

[0121] In this embodiment, the tab connected to the protection circuit 240 is the second polarity tab 120, and the connector connected to the protection circuit 240 is the second connector 220. Therefore, in this embodiment, the second polarity tab 120 is the target tab, and the second connector 220 is the target connector. Correspondingly, in this embodiment, the first polarity tab 110 is the non-target tab, and the first connector 210 is the non-target connector.

[0122] It can be understood that in other embodiments, if the tab connected to the protection circuit 240 is the first polarity tab 110, and the connector connected to the protection circuit 240 is the first polarity connector; then, the first polarity tab 110 is the target tab, and the first connector 210 is the target connector; correspondingly, the second polarity tab 120 is the non-target tab, and the second connector 220 is the non-target connector.

[0123] In this embodiment, the protection circuit 240 includes a detection resistor R1 and a first sub-protection circuit 241. The first sub-protection circuit 241 includes a first switch S1 and a first control chip U1. The first switch S1 is connected in series between the target tab and the target connector. One end of the detection resistor R1 is electrically connected to the target tab, and the other end is electrically connected to the target connector to obtain a detection voltage. The first control chip U1 is electrically connected to the detection resistor R1 to receive the detection voltage. If the detection voltage is greater than or equal to a first threshold voltage, the first control chip U1 controls the first switch S1 to open.

[0124] The detection resistor R1 is a current detection module, so when the detection current flows through the detection resistor R1, a detection voltage is obtained. The first switch S1 may include but is not limited to a MOS transistor, which may also be called a protection MOS or a protection MOS transistor.

[0125] In this embodiment, if the detection voltage is greater than or equal to the first threshold voltage, it indicates that the battery assembly 10 is abnormal. Since the first switch S1 is connected in series between the target tab and the target connector, if the detection voltage is greater than or equal to the first threshold voltage, the first control chip U1 controls the first switch S1 to be disconnected, and the target connector is disconnected from the target tab. When the battery assembly 10 receives an external charging voltage or charging current, the first control chip U1 controls the first switch S1 to be disconnected, and the battery cell 100 cannot continue to receive the external charging voltage or external charging current through the target tab and the target connector, thereby ensuring the safety of the battery assembly 10. When the battery assembly 10 is used to power an electrical device, the first control chip U1 controls the first switch S1 to be disconnected, and the battery cell 100 cannot continue to power the electrical device through the target tab and the target connector, thereby ensuring the safety of the electrical device.

[0126] It is understood that if the detection voltage is less than the first threshold voltage, the first control chip U1 controls the first switch S1 to conduct. When the first switch S1 is included between the target tab and the target connector and no other switches are included, the first control chip U1 controls the first switch S1 to conduct, and the battery assembly 10 can receive an external charging voltage or current to the battery cell 100; when the battery assembly 10 is powering an electrical device, the battery cell 100 can power the electrical device.

[0127] Further, see Figure 24 This embodiment of the present application also includes a second sub-protection circuit 242. The second sub-protection circuit 242 includes a second switch S2 and a second control chip U2. The second switch S2 is connected in series between the target tab and the target connector. If the detection voltage is greater than or equal to a second threshold voltage, the second control chip U2 controls the second switch S2 to open. The second threshold voltage is greater than the first threshold voltage.

[0128] exist Figure 23 In the protection circuit 240 shown, the second switch S2 is closer to the target tab than the first switch S1. Figure 24 In the protection circuit 240 shown, the second switch S2 is closer to the target connector than the first switch S1 .

[0129] The second switch S2 may include but is not limited to a MOS transistor, which may also be called a protection MOS or a protection MOS transistor.

[0130] In this embodiment, if the detection voltage is greater than or equal to the second threshold voltage, it indicates that the battery assembly 10 is abnormal. Since the second switch S2 is connected in series between the target tab and the target connector, if the detection voltage is greater than or equal to the second threshold voltage, the second control chip U2 controls the second switch S2 to be disconnected, and the target connector is disconnected from the target tab. When the battery assembly 10 receives an external charging voltage or charging current, the second control chip U2 controls the second switch S2 to be disconnected, and the battery cell 100 cannot continue to receive the external charging voltage or external charging current through the target tab and the target connector, thereby ensuring the safety of the battery assembly 10. When the battery assembly 10 is used to power an electrical device, the second control chip U2 controls the second switch S2 to be disconnected, and the battery cell 100 cannot continue to power the electrical device through the target tab and the target connector, thereby ensuring the safety of the electrical device.

[0131] The protection circuit 240 provided in the embodiment of the present application, when the first sub-protection circuit 241 fails or malfunctions due to various reasons, if the detection voltage is greater than or equal to the second threshold voltage, the second control chip U2 in the second sub-protection circuit 242 controls the second switch S2 to be disconnected, thereby ensuring the safety of the battery assembly 10 when the battery assembly 10 is charging; it can also ensure the safety of electrical devices when the battery assembly 10 supplies power to electrical devices.

[0132] Understandably, in Figure 23 and Figure 24 In the protection circuit 240 shown, the protection circuit 240 is illustrated as an example including a detection resistor R1, a first sub-protection circuit 241 and a second sub-protection circuit 242. It can be understood that in other embodiments, the protection circuit 240 may include a detection resistor R1 and a first sub-protection circuit 241, but not include the second sub-protection circuit 242.

[0133] Please also refer to Figure 23 or Figure 24 ,and Figure 25 , Figure 25 This is a circuit diagram of a protection circuit in a battery assembly provided in one embodiment of the present application. In this embodiment, the protection circuit 240 includes two detection resistors R1 connected in parallel. The first sub-protection circuit 241 includes two first switches S1 connected in parallel.

[0134] In this embodiment, the protection circuit 240 includes two detection resistors R1, and the two detection resistors R1 are connected in parallel. Therefore, the resistance value of the two detection resistors R1 connected in parallel is less than the resistance value of any one of the two detection resistors R1. Figure 25 In the figure, the two detection resistors are labeled RS1 and RS2. Thus, the protection circuit 240 includes two detection resistors R1, which can reduce the resistance of the detection resistors R1, thereby making the detection current across the two parallel detection resistors R1 more sensitive to changes. In addition, the detection circuit includes two detection resistors R1, so if one detection resistor R1 fails, the other detection resistor R1 is still available, thereby ensuring the detection current or voltage.

[0135] Furthermore, in the battery assembly 10 provided in the embodiment of the present application, the protection circuit 240 includes two detection resistors R1, and the resistance value of the two detection resistors R1 connected in parallel is smaller than the resistance value of any one of the two detection resistors R1, which can also reduce the energy loss caused by setting the detection resistor R1 in the battery assembly 10.

[0136] In this embodiment, the first sub-protection circuit 241 includes two first switches S1, which are connected in parallel. The resistance value of the two first switches S1 connected in parallel is smaller than the resistance value of any one of the two first switches S1. This helps to reduce the energy loss caused by the installation of the first switch S1 in the battery assembly 10. Figure 25 In FIG, the two first switches are respectively labeled as Q1 and Q3.

[0137] Please continue reading Figure 25 , the first control chip U1 has a first port, a second port, a third port, a fourth port, a fifth port and a sixth port. Figure 25 In the figure, corresponding to each port of the first control chip U1, the one marked as "1" represents the first port, the one marked as "2" represents the second port, the one marked as "3" represents the third port, the one marked as "4" represents the fourth port, the one marked as "5" represents the fifth port, and the one marked as "6" represents the sixth port. The fifth port is electrically connected to the non-target tab. The fourth port is electrically connected to one end of the detection resistor R1 (marked as VSS in the figure). The sixth port is electrically connected to the other end of the detection resistor R1 (marked as CS in the figure), and the one end of the detection resistor R1 is electrically connected to the target tab. The second port is electrically connected to one end of the two first switches S1, the third port is electrically connected to the other end of the first switch S1, and the first port is electrically connected to the target connector.

[0138] In this embodiment, the fifth port is a power port (ie, a VDD port), the fourth port is a ground port (ie, a GND port), and the sixth port is a detection voltage signal receiving port for receiving the detection voltage of the detection resistor R1.

[0139] In an embodiment, the electrical connection relationship among the first control chip U1 , the detection resistor R1 , the two first switches S1 , etc. is simple and easy, and is convenient for controlling the state of the first switch S1 according to the detection voltage of the detection resistor R1 .

[0140] Furthermore, in this embodiment, the protection circuit 240 further includes a first voltage-stabilizing resistor R6 and a first filter capacitor (labeled as C11 and C6 in the figure). One end of the first voltage-stabilizing resistor R6 is electrically connected to the non-target tab, and the other end of the first voltage-stabilizing resistor R6 is electrically connected to the fifth port. One end of the first filter capacitor is electrically connected to the other end of the first voltage-stabilizing resistor R6, and the other end of the first filter capacitor is electrically connected to one end of the detection resistor R1 (the end connected to VSS in the figure). The other end of the first filter capacitor is also electrically connected to the fourth port.

[0141] The resistance value of the first voltage-stabilizing resistor R6 is typically in the kilo-ohm (KΩ) or mega-ohm (MΩ) range. The first voltage-stabilizing resistor R6 can stabilize the current of the printed circuit board 230. The first filter capacitor can filter out glitches in the current and stabilize the voltage.

[0142] It can be seen that the protection circuit 240 provided in the embodiment of the present application also includes a first voltage-stabilizing resistor R6 and a first filter capacitor. The first voltage-stabilizing resistor R6 and the first filter capacitor cooperate with each other to stabilize the voltage and current of the printed circuit board 230.

[0143] When the battery assembly 10 receives external charging voltage or current, it stabilizes the voltage and current, thereby ensuring smooth charging of the battery cell 100. When the battery assembly 10 supplies power to an electrical device, it also provides stable voltage and current to the device, minimizing or even preventing damage to the device from unstable voltage and current.

[0144] In this embodiment, the first filter capacitor includes two first sub-capacitors connected in series, and the two first sub-capacitors are marked as C11 and C6 respectively.

[0145] In the battery assembly 10 provided in this embodiment, the first filter capacitor includes two first sub-capacitors connected in series. The capacitance values ​​of the two first sub-capacitors may be the same or different, which is not limited in the embodiment of the present application.

[0146] In the battery assembly 10 provided in the embodiment of the present application, the first filter capacitor includes two first sub-capacitors connected in series, so that the first filter capacitor has a relatively large capacitance, thereby better removing burrs in the current and better stabilizing the voltage.

[0147] Next, the second sub-protection circuit 242 provided in the embodiment of the present application is described in detail.

[0148] The second sub-protection circuit 242 includes two second switches, which are connected in parallel. Figure 25 They are marked as Q2 and Q4 respectively.

[0149] In this embodiment, the second sub-protection circuit 242 includes two second switches connected in parallel, and the resistance of the two second switches connected in parallel is less than the resistance of either of the two second switches. This helps reduce energy loss caused by the provision of the second switches in the battery assembly 10.

[0150] Please continue reading Figure 25, the second control chip U2 has a first pin, a second pin, a third pin, a fourth pin, a fifth pin and a sixth pin. Figure 25 In the figure, at each port corresponding to the second control chip U2, the one marked as "1" represents the first pin, the one marked as "2" represents the second pin, the one marked as "3" represents the third pin, the one marked as "4" represents the fourth pin, the one marked as "5" represents the fifth pin, and the one marked as "6" represents the sixth pin. The fifth pin is electrically connected to the non-target tab. The fourth pin is electrically connected to the one end of the detection electronics (marked as VSS). The sixth pin is electrically connected to the other end of the detection resistor R1 (marked as CS in the figure). The second pin is electrically connected to one end of the two second switches S2, the third pin is electrically connected to the other end of the two second switches S2, and the first pin is electrically connected to the target connector.

[0151] In this embodiment, the second control chip U2 is of the same type as the first control chip U1 to simplify control. In another embodiment, the second control chip U2 is of a different type than the first control chip U1. This application does not limit whether the first control chip U1 and the second control chip U2 are of the same type, as long as the first control chip U1 can control the first switch S1 and the second control chip U2 can control the second switch S2.

[0152] In this embodiment, the fifth pin is a power pin (ie, VDD pin), the fourth pin is a ground pin (ie, GND pin), and the sixth pin is a detection voltage signal receiving pin for receiving the detection voltage of the detection resistor R1.

[0153] In an embodiment, the electrical connection relationship among the second control chip U2 , the detection resistor R1 , the two second switches S2 , etc. is simple and easy, and is convenient for controlling the state of the second switch S2 according to the detection voltage of the detection resistor R1 .

[0154] Furthermore, in this embodiment, the protection circuit 240 further includes a second voltage-stabilizing resistor R11 and a second filter capacitor (labeled as C7 and C18 in the figure). One end of the second voltage-stabilizing resistor R11 is electrically connected to the non-target tab, and the other end of the second voltage-stabilizing resistor R11 is electrically connected to the fifth pin. One end of the second filter capacitor is electrically connected to the other end of the second voltage-stabilizing resistor R11, and the other end of the second filter capacitor is electrically connected to the one end of the detection resistor R1, and the other end of the second filter capacitor is also electrically connected to the fourth pin.

[0155] The resistance value of the second voltage-stabilizing resistor R11 is typically in the kilo-ohm (KΩ) or mega-ohm (MΩ) range. The second voltage-stabilizing resistor R11 can stabilize the current of the printed circuit board 230. The second filter capacitor can filter out glitches in the current and stabilize the voltage.

[0156] It can be seen that the protection circuit 240 provided in the embodiment of the present application also includes a second voltage-stabilizing resistor R11 and a second filter capacitor. The second voltage-stabilizing resistor R11 and the second filter capacitor cooperate with each other to stabilize the voltage and current of the printed circuit board 230.

[0157] When the battery assembly 10 receives external charging voltage or current, it stabilizes the voltage and current, thereby ensuring smooth charging of the battery cell 100. When the battery assembly 10 supplies power to an electrical device, it also provides stable voltage and current to the device, minimizing or even preventing damage to the device from unstable voltage and current.

[0158] In this embodiment, the second filter capacitor includes two second sub-capacitors connected in series, which are labeled C7 and C18 in the figure.

[0159] In the battery assembly 10 provided in this embodiment, the second filter capacitor includes two second sub-capacitors connected in series. The capacitance values ​​of the two second sub-capacitors may be the same or different, which is not limited in the embodiment of the present application.

[0160] In the battery assembly 10 provided in the embodiment of the present application, the second filter capacitor includes two second sub-capacitors connected in series, so that the second filter capacitor has a relatively large capacitance, thereby better removing glitches in the current and better stabilizing the voltage.

[0161] Please continue reading Figure 25 The protection circuit 240 further includes a power meter unit 244. The power meter unit 244 is used to calculate the amount of electricity charged by the battery cell 100.

[0162] The protection circuit 240 also includes a fuel meter unit 244, which is used to calculate the amount of electricity charged in the battery cell 100. When the battery assembly 10 is used in an electronic device 1, the fuel meter unit 244 is also used to be electrically connected to the processor of the electronic device 1 so that the processor can read the amount of electricity calculated by the fuel meter unit 244 and display the amount of electricity calculated by the fuel meter unit 244. For example, the processor of the electronic device 1 in which the battery assembly 10 is used is used to display the amount of electricity calculated by the fuel meter unit 244 on the display screen 50 of the electronic device 1 in the form of an icon or numerals.

[0163] See also Figure 26 , Figure 26 A schematic diagram of a battery pack protection circuit according to another embodiment of the present application is provided. In this embodiment, for ease of description, the tab to which the protection circuit 240 is connected is referred to as the target tab, and the connector to which the protection circuit 240 is connected is referred to as the target connector. Tabs not connected to the protection circuit 240 are referred to as non-target tabs, and the connector to which the protection circuit 240 is connected is referred to as non-target connectors.

[0164] In this embodiment, the tab connected to the protection circuit 240 is the second polarity tab 120, and the connector connected to the protection circuit 240 is the second connector 220. Therefore, in this embodiment, the second polarity tab 120 is the target tab, and the second connector 220 is the target connector. Correspondingly, in this embodiment, the first polarity tab 110 is the non-target tab, and the first connector 210 is the non-target connector.

[0165] It can be understood that in other embodiments, if the tab connected to the protection circuit 240 is the first polarity tab 110, and the connector connected to the protection circuit 240 is the first polarity connector; then, the first polarity tab 110 is the target tab, and the first connector 210 is the target connector; correspondingly, the second polarity tab 120 is the non-target tab, and the second connector 220 is the non-target connector.

[0166] In this embodiment, the protection circuit 240 includes a detection resistor R1 and a first sub-protection circuit 241. The first sub-protection circuit 241 includes a first switch S1 and a first control chip U1. The first switch S1 is connected in series between the target tab and the target connector. One end of the detection resistor R1 is electrically connected to the target tab, and the other end is electrically connected to the target connector to obtain a detection voltage. The first control chip U1 is electrically connected to the detection resistor R1 to receive the detection voltage. If the detection voltage is greater than or equal to a first threshold voltage, the first control chip U1 controls the first switch S1 to open.

[0167] The detection resistor R1 is a current detection module, so when the detection current flows through the detection resistor R1, a detection voltage is obtained. The first switch S1 may include but is not limited to a metal-oxide-semiconductor (MOS) transistor, which may also be called a protection MOS or a protection MOS transistor.

[0168] In this embodiment, if the detection voltage is greater than or equal to the first threshold voltage, it indicates that the battery assembly 10 is abnormal. Since the first switch S1 is connected in series between the target tab and the target connector, if the detection voltage is greater than or equal to the first threshold voltage, the first control chip U1 controls the first switch S1 to be disconnected, and the target connector is disconnected from the target tab. When the battery assembly 10 receives an external charging voltage or charging current, the first control chip U1 controls the first switch S1 to be disconnected, and the battery cell 100 cannot continue to receive the external charging voltage or external charging current through the target tab and the target connector, thereby ensuring the safety of the battery assembly 10. When the battery assembly 10 is used to power an electrical device, the first control chip U1 controls the first switch S1 to be disconnected, and the battery cell 100 cannot continue to power the electrical device through the target tab and the target connector, thereby ensuring the safety of the electrical device.

[0169] It is understood that if the detection voltage is less than the first threshold voltage, the first control chip U1 controls the first switch S1 to conduct. When the first switch S1 is included between the target tab and the target connector and no other switches are included, the first control chip U1 controls the first switch S1 to conduct, and the battery assembly 10 can receive an external charging voltage or current to the battery cell 100; when the battery assembly 10 is powering an electrical device, the battery cell 100 can power the electrical device.

[0170] Furthermore, in this embodiment, the protection circuit 240 further includes a second sub-protection circuit 242, which is connected in series between the target tab and the target connector. If the detection voltage is greater than or equal to the first threshold, the second sub-protection circuit 242 is disconnected.

[0171] In the schematic diagram of this embodiment, the second sub-protection circuit 242 is closer to the target tab than the detection resistor R1. It can be understood that this should not be understood as a limitation on the embodiment of the present application, as long as the second sub-protection circuit 242 is connected in series between the target tab and the target connector.

[0172] In this embodiment, the second sub-protection circuit 242 includes a positive temperature coefficient thermistor (PTC) or a fuse. In this embodiment, when the detection voltage is greater than or equal to the first threshold, the second sub-protection circuit 242 is disconnected, and the target tab is disconnected from the target connector.

[0173] The present application implements an embodiment of a battery assembly 10 provided in accordance with an embodiment. For the solution of the battery assembly 10 with a multi-pole lug structure, the protection circuit 240 is located on the printed circuit board 230, and the protection circuit 240 is electrically connected between the first polarity lug 110 and the first connector 210; or, the protection circuit 240 is electrically connected between the second polarity lug 120 and the second connector 220; that is, the protection circuit 240 adopts a single conductive loop, so that the solution of the printed circuit board 230 (also called the protection board) in the battery assembly 10 is relatively simple, and the impedance of the printed circuit board 230 (also called the protection board) can be greatly reduced.

[0174] In summary, an embodiment of the present application proposes a novel low-complexity, low-impedance battery assembly 10 (also called a battery module) solution for a multi-tab battery solution.

[0175] In the battery assembly 10 provided in the embodiments of the present application, an example is given in which the protection circuit 240 is incorporated into a battery assembly 10 having two first polarity tabs 110, two second polarity tabs 120, a first connector 210, and a second connector 220. Since the protection circuit 240 is incorporated into the battery assembly 10 having two first polarity tabs 110, two second polarity tabs 120, a first connector 210, and a second connector 220, it is also referred to as the protection circuit 240 being incorporated into a battery assembly 10 having four tabs and two connectors (the two connectors being the first connector 210 and the second connector 220, which are also referred to as battery interfaces).

[0176] It is understandable that the battery assembly 10 solution provided in the embodiments of the present application, in which the protection circuit 240 adopts a single conductive circuit design concept, can be extended to battery assemblies 10 with other structures, such as solutions with two or three tabs, or even solutions with five tabs. The design concept of the protection circuit 240 adopting a single conductive circuit can also be extended to battery assembly 10 solutions with other numbers of battery interfaces (also called interfaces), such as solutions with three or four battery interfaces. In other words, the embodiments of the present application do not limit the number of first polarity tabs 110, the number of second polarity tabs 120, the number of first connectors 210, and the number of second connectors 220 included in the battery assembly 10, as long as the protection circuit 240 adopts a single conductive circuit; in other words, as long as the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210; or, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220.

[0177] An embodiment of the present application provides an electronic device 1. The electronic device 1 includes, but is not limited to, a mobile phone, a telephone, a television, a tablet computer (Pad), a personal computer, a laptop computer (PC), a vehicle-mounted device, a headset, a watch, a wearable device, and the like, which can transmit and receive electromagnetic wave signals. In the schematic diagram of the embodiment of the present application, the electronic device 1 is illustrated as a mobile phone. It is understood that this should not be construed as limiting the electronic device 1 provided in the embodiment of the present application. The electronic device 1 provided in the embodiment of the present application is introduced.

[0178] Please also refer to Figure 27 and Figure 28 , Figure 27 A schematic diagram of an electronic device provided in one embodiment of the present application; Figure 28 for Figure 27 The electronic device 1 includes a battery assembly 10. Please refer to the previous description of the battery assembly 10 and will not be described again here.

[0179] See also Figure 27 , the electronic device 1 provided in one embodiment of the present application further includes a middle frame 30, a display screen 50 and a back cover 60. The display screen 50 is arranged on one side of the middle frame 30. The display screen 50 is a component in the electronic device 1 that realizes the display function. When the electronic device 1 is in a vertical screen state, the display screen 50 of the electronic device 1 faces the user. The back cover 60 is arranged on the other side of the middle frame 30. In other words, the back cover 60 and the display screen 50 are respectively arranged on two opposite sides of the middle frame 30. The back cover 60 cooperates with the middle frame 30 to form a receiving space to accommodate the functional components of the electronic device 1, such as the rear camera, battery assembly 10, etc. It can be understood that the description of other components in the electronic device 1 should not be understood as a limitation on the battery assembly 10 in the electronic device 1 provided in the embodiment of the present application.

[0180] See also Figure 28 , the electronic device 1 further includes a mainboard 70. In one embodiment, the battery assembly 10 and the mainboard 70 are arranged along a preset direction D1. In one embodiment, the preset direction D1 is the length direction of the electronic device 1. Figure 4 and Figure 28 The main board 70 is arranged on a side of the protection circuit 240 away from the battery cell 100 .

[0181] In one embodiment, combining Figure 1The bottom surface 100b and the end surface 100a of the battery cell 100 are disposed opposite to each other. The printed circuit board 230 has a first surface 230a and a second surface 230b disposed opposite to each other in the thickness direction, with one of the first surface 230a and the second surface 230b facing the end surface 100a. The main board 70 is disposed on the other of the first surface 230a and the second surface 230b, which is away from the first surface 230a and the second surface 230b.

[0182] In this embodiment, the first surface 230a is oriented toward the end surface 100a, and the second surface 230b is away from the end surface 100a compared to the first surface 230a. It is understood that this should not be understood as a limitation on the battery assembly 10 provided in the embodiment of the present application. In other embodiments, the second surface 230b is oriented toward the end surface 100a, and the first surface 230a is away from the end surface 100a compared to the second surface 230b. The bottom surface 100b and the end surface 100a are arranged along a preset direction D1. In this embodiment, the first surface 230a is oriented toward the end surface 100a, and the mainboard 70 is arranged on the side of the second surface 230b away from the first surface 230a.

[0183] In this embodiment, the bottom surface 100b and end surface 100a of the battery cell 100 are disposed opposite each other. The bottom surface 100b and the end surface 100a are arranged along a predetermined direction D1. In this embodiment, the predetermined direction D1 is the longitudinal direction of the battery cell 100. When the predetermined direction D1 is the longitudinal direction of the battery cell 100, the arrangement direction of the bottom surface 100b and the end surface 100a is the longitudinal direction of the battery cell 100. Generally speaking, the thickness of the printed circuit board 230 is less than the width of the printed circuit board 230, and the thickness of the printed circuit board 230 is less than the length of the printed circuit board 230. The printed circuit board 230 has a first surface 230a and a second surface 230b disposed opposite each other in the thickness direction. One of the first surface 230a and the second surface 230b faces the end surface 100a. When the dimensions of the battery cell 100 along the predetermined direction D1 remain constant, the sum of the dimensions of the battery cell 100 and the printed circuit board 230 in the predetermined direction D1 can be reduced, thereby facilitating miniaturization of the dimensions of the battery assembly 10 in the predetermined direction D1. Furthermore, when the dimensions of the battery assembly 10 along the predetermined direction D1 remain constant, one of the first surface 230a and the second surface 230b of the printed circuit board 230 faces the end surface 100a, thereby lengthening the dimensions of the battery cell 100 in the predetermined direction D1 and facilitating increased capacitance of the battery assembly 10.

[0184] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application, and these improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A battery assembly, characterized in that: The battery assembly comprises: A battery cell having a first polarity tab and a second polarity tab, wherein the first polarity is different from the second polarity; and A protection board assembly, the protection board assembly includes a first connector, a second connector, a printed circuit board and a protection circuit, the first connector is used to electrically connect to the first polarity tab, the second connector is used to electrically connect to the second polarity tab, the protection circuit is located on the printed circuit board, and the protection circuit is electrically connected between the first polarity tab and the first connector; or, the protection circuit is electrically connected between the second polarity tab and the second connector.

2. The battery assembly according to claim 1, wherein The battery cell has an end surface, and the first polarity tab and the second polarity tab are located on the end surface; The printed circuit board has a first surface and a second surface that are disposed opposite to each other in a thickness direction, and one of the first surface and the second surface faces the end surface.

3. The battery assembly according to claim 2, wherein: The battery assembly further comprises: A fixing member fixes the printed circuit board and the battery cell.

4. The battery assembly according to claim 3, wherein: The fixing member wraps a portion of the battery core and at least a portion of the printed circuit board.

5. The battery assembly according to claim 1, wherein: The protection board assembly includes a first connector and a second connector; the battery cell includes: Two first polarity tabs arranged adjacently and spaced apart, the two first polarity tabs being electrically connected to the same first connector; and Two second polarity tabs are adjacently and spaced apart, the two second polarity tabs are disposed on one side of the two first polarity tabs, and the two second polarity tabs are electrically connected to the same second connector.

6. The battery assembly according to claim 5, wherein: If the protection circuit is electrically connected between the two first polarity tabs and the first connector, the two second polarity tabs are connected to be electrically connected, and the two second polarity tabs are electrically connected to the second connector through the same wire; If the protection circuit is electrically connected between the two second polarity tabs and the second connector, the two first polarity tabs are connected to be electrically connected, and the two first polarity tabs are electrically connected to the first connector through the same wire.

7. The battery assembly according to claim 1, wherein: The protection board assembly includes a first connector and a second connector; the battery cell includes: a first polarity tab electrically connected to the first connector; and A second polarity tab is electrically connected to the second connector.

8. The battery assembly according to claim 1, wherein: The protection board assembly includes a first connector and a second connector; the battery cell includes: a first polarity tab electrically connected to the first connector; and Two second polarity tabs are adjacently and spaced apart from each other, the two second polarity tabs are disposed on the same side of the first polarity tab, and the two second polarity tabs are electrically connected to the same second connector.

9. The battery assembly according to claim 1, wherein: The protection board assembly includes two first connectors and one second connector; the battery cell includes: Two first polarity tabs are adjacent and spaced apart, the two first polarity tabs are electrically connected, and the two first polarity tabs are electrically connected to one of the two first connectors through a first wire, and the two first polarity tabs are electrically connected to the other of the two first connectors through a second wire; Two second polarity tabs are adjacently and spaced apart, the two second polarity tabs are disposed on one side of the two first polarity tabs, and the two second polarity tabs are electrically connected to the same second connector.

10. The battery assembly according to claim 1, wherein: The protection board assembly includes two first connectors and two second connectors; the battery cell includes: Two first polarity tabs are adjacent and spaced apart, the two first polarity tabs are electrically connected, and the two first polarity tabs are electrically connected to one of the two first connectors through a first wire, and the two first polarity tabs are electrically connected to the other of the two first connectors through a second wire; Two second polarity tabs are adjacent and spaced apart, the two second polarity tabs are electrically connected, the two second polarity tabs are arranged on one side of the two first polarity tabs, the two second polarity tabs are electrically connected to one of the two second connectors through a third wire, and the two second polarity tabs are electrically connected to the other of the two second connectors through a fourth wire.

11. The battery assembly according to claim 1, wherein: The battery cell includes two sub-cells, each sub-cell includes a positive electrode tab and a negative electrode tab, the positive electrode tab of one of the two sub-cells serves as one of the first polarity tab and the second polarity tab, the positive electrode tab of the other of the two sub-cells is adjacent to and electrically connected to the negative electrode tab of the one of the two sub-cells, and the negative electrode tab of the other of the two sub-cells serves as the other of the first polarity tab and the second polarity tab; The protection plate assembly includes a first connector and a second connector, wherein the first connector is electrically connected to the first polarity tab, and the second connector is electrically connected to the second polarity tab.

12. The battery assembly according to claim 1, wherein: The protection plate assembly further comprises: a first flexible circuit board, wherein the first connector is electrically connected to the printed circuit board through the first flexible circuit board, and the printed circuit board is electrically connected to the first polarity tab; and A second flexible circuit board, wherein the second connector is electrically connected to the printed circuit board through the second flexible circuit board, and the printed circuit board is electrically connected to the second polarity tab.

13. The battery assembly according to claim 1, wherein: The battery assembly further includes at least one of a packaging film and an easy-tear paper; When the battery assembly further includes a packaging film, the packaging film is coated on the battery cell to encapsulate the battery cell, and the first polarity tab and the second polarity tab are exposed from the packaging film; When the battery assembly further includes easy-tear paper, the easy-tear paper is arranged on the outside of the battery core and is used for removing the battery assembly from the electronic device in which the battery assembly is used.

14. The battery assembly according to any one of claims 1 to 13, wherein: The tab to which the protection circuit is connected is the target tab, and the connector to which the protection circuit is connected is the target connector; the tab not connected to the protection circuit is the non-target tab, and the connector to which the protection circuit is connected is the non-target connector; The protection circuit includes a detection resistor and a first sub-protection circuit, and the first sub-protection circuit includes a first switch and a first control chip; The first switch is connected in series between the target tab and the target connector; One end of the detection resistor is electrically connected to the target tab, and the other end is electrically connected to the target connector, so as to obtain a detection voltage; The first control chip is electrically connected to the detection resistor to receive the detection voltage. If the detection voltage is greater than or equal to a first threshold voltage, the first control chip controls the first switch to be turned off.

15. The battery assembly according to claim 14, wherein: The protection circuit includes two detection resistors, which are connected in parallel; the first sub-protection circuit includes: Two first switches are connected in parallel.

16. The battery assembly according to claim 15, wherein: The first control chip has a first port, a second port, a third port, a fourth port, a fifth port and a sixth port; The fifth port is electrically connected to the non-target tab, the fourth port is electrically connected to one end of the detection resistor, the sixth port is electrically connected to the other end of the detection resistor, and the one end of the detection resistor is electrically connected to the target tab; The second port is electrically connected to one end of the two first switches, the third port is electrically connected to the other end of the first switch, and the first port is electrically connected to a target connector.

17. The battery assembly according to claim 16, wherein: The protection circuit further includes: a first voltage-stabilizing resistor, one end of the first voltage-stabilizing resistor being electrically connected to the non-target tab, and the other end of the first voltage-stabilizing resistor being electrically connected to the fifth port; and A first filter capacitor, one end of the first filter capacitor is electrically connected to the other end of the first voltage-stabilizing resistor, the other end of the first filter capacitor is electrically connected to one end of the detection resistor, and the other end of the first filter capacitor is also electrically connected to the fourth port.

18. The battery assembly according to claim 17, wherein: The first filter capacitor includes two first sub-capacitors connected in series.

19. The battery assembly according to claim 14, wherein: The protection circuit further includes a second sub-protection circuit, and the second sub-protection circuit includes: a second switch connected in series between the target tab and the target connector; and The second control chip controls the second switch to be disconnected if the detection voltage is greater than or equal to a second threshold voltage, wherein the second threshold voltage is greater than the first threshold voltage.

20. The battery assembly according to claim 19, wherein: The second sub-protection circuit includes: Two second switches are connected in parallel.

21. The battery assembly according to claim 20, wherein: The second control chip has a first pin, a second pin, a third pin, a fourth pin, a fifth pin and a sixth pin; The fifth pin is electrically connected to the non-target tab, the fourth pin is electrically connected to the one end of the detection resistor, and the sixth pin is electrically connected to the other end of the detection resistor; The second pin is electrically connected to one end of the two second switches, the third pin is electrically connected to the other end of the two second switches, and the first pin is electrically connected to the target connector.

22. The battery assembly according to claim 21, wherein: The protection circuit further includes: a second voltage-stabilizing resistor, one end of the second voltage-stabilizing resistor being electrically connected to the non-target tab, and the other end of the second voltage-stabilizing resistor being electrically connected to the fifth pin; and A second filter capacitor, one end of the second filter capacitor is electrically connected to the other end of the second voltage-stabilizing resistor, the other end of the second filter capacitor is electrically connected to the one end of the detection resistor, and the other end of the second filter capacitor is also electrically connected to the fourth pin.

23. The battery assembly according to claim 22, wherein: The second filter capacitor includes two second sub-capacitors connected in series.

24. The battery assembly according to claim 14, wherein: The protection circuit further includes: A power meter unit is used to calculate the amount of power charged by the battery cell.

25. The battery assembly according to claim 1, wherein The first polarity is positive, and the second polarity is negative; or, the first polarity is negative, and the second polarity is positive.

26. The battery assembly according to claim 14, wherein: The protection circuit further includes a second sub-protection circuit, which is connected in series between the target tab and the target connector. If the detection voltage is greater than or equal to the first threshold, the second sub-protection circuit is disconnected.

27. An electronic device, characterized in that: The electronic device comprises the battery assembly according to any one of claims 1-26.

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