Battery assembly and electronic device

Abstract

The application provides a battery assembly and an electronic device. The battery assembly comprises an electric core and a protection plate assembly. The electric core has a first polarity lug and a second polarity lug, wherein 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 electrically connecting to the first polarity lug. The second connector is used for electrically connecting to the second polarity lug. The protection circuit is located on the printed circuit board. The protection circuit is electrically connected between the first polarity lug and the first connector. Alternatively, the protection circuit is electrically connected between the second polarity lug and the second connector. The battery assembly provided by the application has a small line resistance of the protection plate assembly.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery assembly and electronic device. Background Technology

[0002] With the fast pace of life, people are using mobile phones and other electronic devices more and more. Electronic devices typically include battery packs to power the components within them. However, the protection boards of these battery packs often have relatively high line resistance. Utility Model Content

[0003] In a first aspect, one embodiment of this application provides a battery assembly, the battery assembly comprising: A battery cell, the battery cell having a first polarity tab and a second polarity tab, wherein the first polarity and the second polarity are different; and A protection board assembly includes a first connector, a second connector, a printed circuit board, and a protection circuit. The first connector is electrically connected to a first polarity tab, and the second connector is electrically connected to a second polarity tab. The protection circuit is located on the printed circuit board and 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.

[0004] In a second aspect, one embodiment of this application provides an electronic device, the electronic device including the battery assembly as described in the first aspect.

[0005] In summary, in the battery assembly provided by this 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 shorter conductive wire can be used in the protection board assembly to electrically connect the first polarity tab and the first connector. Correspondingly, a shorter conductive wire can be used in the protection board assembly to electrically connect the second polarity tab and the second connector. Thus, in the battery assembly provided by this 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 board assembly.

[0006] Furthermore, in the battery assembly provided in this application embodiment, the protection circuit is located on the printed circuit board. Therefore, the protection circuit does not need to occupy the area of ​​the motherboard, which allows the battery assembly to have a larger size when applied in electronic devices, which is beneficial to increasing the battery capacity. Attached Figure Description

[0007] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the implementation will be briefly introduced below. Obviously, the drawings described below are some implementations of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0008] Figure 1 A schematic diagram of a battery assembly provided according to one embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the battery assembly from another perspective; Figure 3 One implementation method Figure 1 The equivalent circuit diagram of the battery assembly shown is shown. Figure 4 Another implementation Figure 1 The equivalent circuit diagram of the battery assembly shown is shown. Figure 5 A schematic diagram of a battery assembly provided for another embodiment of this application; Figure 6 for Figure 5 A schematic diagram of the battery assembly from another perspective; Figure 7 A schematic diagram of a battery assembly provided in the first embodiment of this application; Figure 8 A schematic diagram of the battery assembly provided in the second embodiment of this application; Figure 9 A schematic diagram of a battery assembly provided in the third embodiment of this application; Figure 10 A schematic diagram of a battery assembly provided in the fourth embodiment of this application; Figure 11 A schematic diagram of a battery assembly provided in the fifth embodiment of this application; Figure 12 A schematic diagram of a battery assembly provided in the sixth embodiment of this application; Figure 13 A schematic diagram of a battery assembly provided in the seventh embodiment of this application; Figure 14 A schematic diagram of a battery assembly provided in the eighth embodiment of this application; Figure 15 A schematic diagram of a battery assembly provided in the ninth embodiment of this application; Figure 16 A schematic diagram of a battery assembly provided in the tenth embodiment of this application; Figure 17 A schematic diagram of the battery assembly provided in the eleventh embodiment of this application; Figure 18 A schematic diagram of the battery assembly provided in the twelfth embodiment of this application; Figure 19 A schematic diagram of the battery assembly provided in the thirteenth embodiment of this application; Figure 20 A schematic diagram of a battery assembly provided in the fourteenth embodiment of this application; Figure 21 A schematic diagram of a battery assembly provided according to one embodiment of this application; Figure 22 for Figure 21 A schematic diagram of the battery assembly from another perspective; Figure 23 A schematic diagram of a protection circuit for a battery assembly provided in one embodiment of this application; Figure 24 A schematic diagram of a protection circuit for a battery assembly provided in another embodiment of this application; Figure 25 A circuit diagram of a protection circuit in a battery assembly provided according to an embodiment of this application; Figure 26 A schematic diagram of a protection circuit for a battery assembly provided in another embodiment of this application; Figure 27 A schematic diagram of an electronic device provided according to one embodiment of this application; Figure 28 for Figure 27 The diagram shows a partial structural schematic of the electronic device. Detailed Implementation

[0009] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the embodiments described in this application are only a part of the embodiments, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without creative effort are within the protection scope of this application.

[0010] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0011] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a particular order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, an assembly or device comprising one or more components is not limited to the one or more components listed, but may optionally also include one or more components not listed but inherent to the exemplified product, or one or more components that it should have based on the described function.

[0012] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1 A schematic diagram of a battery assembly provided according to one embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the battery assembly from another perspective; Figure 3 One implementation method Figure 1 The equivalent circuit diagram of the battery assembly shown is shown. Figure 4 Another implementation Figure 1 The diagram shows an equivalent circuit diagram of the battery assembly. 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 and the second polarity are different. 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 electrically connected to the first polarity tab 110. The second connector 220 is electrically connected 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; or, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220.

[0013] 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 example of the battery cell 100 having two first polarity tabs 110 and two second polarity tabs 120 is used for illustration. It should be understood that this should not be construed as a limitation on the embodiments of this application.

[0014] 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 a first polarity tab 110, and the second connector 220 is electrically connected to a 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.

[0015] 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 rigid board.

[0016] In the battery assembly 10 of the related art, the first polarity tab 110 and the second polarity tab 120 of the cell 100 are arranged alternately, and the same connector connects both the first polarity tab 110 and the second polarity tab 120. In the related art, the conductive wire electrically connecting the first polarity tab 110 to the connector is typically positioned towards the edge of the protection plate, and the conductive wire electrically connecting the second polarity tab 120 to the connector is also typically positioned towards the edge of the protection plate. For ease 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 protection plate is electrically connected to the first polarity tab 110 to the connector, and the first conductive wire is positioned towards the edge of the protection plate. The second conductive wire of the protection plate is electrically connected to the second polarity tab 120 to the connector, and the second conductive wire is positioned towards the edge of the protection plate. If the connector is close to the first polarity tab 110, then the second conductive line connecting the second polarity tab 120 and the connector will be longer. If the connector is close to the second polarity tab 120, then the first conductive line connecting the first polarity tab 110 and the connector will be longer. Therefore, the longer traces of the first and second conductive lines in the related art result in a higher impedance for the protection board of the battery assembly 10.

[0017] In the battery assembly 10 provided in this 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; 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 this embodiment, 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.

[0018] 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 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 the second path). Therefore, the protection circuit 240 of the battery assembly 10 of this application is located in a single path, and thus, the protection circuit 240 is also referred to as 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 connected to the protection circuit 240 by complex wiring; 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 connected to the protection circuit 240 by complex wiring, thus further reducing the line resistance of the protection board assembly 200.

[0019] Furthermore, the printed circuit board 230 in the protection board assembly 200 is a rigid board. Therefore, the printed circuit board 230 can house the protection circuit 240. In one embodiment, the protection circuit 240 includes a plurality of electronic devices. The plurality of electronic devices are disposed on at least one surface of the printed circuit board 230.

[0020] In this embodiment, the printed circuit board 230 of the protection board assembly 200 in the battery provided by this application is a rigid 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 motherboard 70 of the electronic device 1.

[0021] In another related technology, the battery assembly 10 has a flexible circuit board connecting the battery cell 100 and the protection circuit 240, with the protection circuit 240 located on the main board 70. Typically, a flexible circuit board (FPC) is a flexible board containing only conductive lines for transmitting electrical signals. Because the FPC is flexible, the protection circuit 240 cannot usually be directly mounted on it. If the flexible circuit board is required to connect to the protection circuit 240, the protection circuit 240 needs to be mounted on the main board 70 of the electronic device 1 to which the battery assembly 10 is used. When the protection circuit 240 is mounted on the main board 70 of the electronic device 1, it occupies a portion of the main board 70's area, resulting in a larger main board 70 and consequently reducing the space of the battery assembly 10.

[0022] In the battery provided in this application embodiment, 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 motherboard 70, which allows the battery assembly 10 to have a larger size when applied in the electronic device 1, which is beneficial to increasing the capacity of the battery assembly 10.

[0023] In summary, in the battery assembly 10 provided by this application 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. 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 by this application embodiment, 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.

[0024] Furthermore, in the battery assembly 10 provided in this application embodiment, 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 motherboard 70, which allows the battery assembly 10 to have a larger size when applied in the electronic device 1, which is beneficial to increasing the battery capacity of the battery assembly 10.

[0025] Further, please refer to Figure 1 According to one embodiment of this application, a battery assembly 10 is provided, wherein the battery cell 100 has an end face 100a. A first polarity tab 110 and a second polarity tab 120 are located on the end face 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, one of which faces the end face 100a.

[0026] In this embodiment, the surfaces of the battery cell 100 that expose the first polarity tab 110 and the second polarity tab 120 are designated as end face 100a. The first polarity tab 110 and the second polarity tab 120 are located on end face 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 face 100a. In this embodiment, the example of the first surface 230a facing the end face 100a and the second surface 230b being opposite to the end face 100a relative to the first surface 230a is used for illustration. It should be understood that this should not be construed as a limitation on the battery assembly 10 provided in this application embodiment. In other embodiments, the second surface 230b faces the end face 100a, and the first surface 230a is opposite to the end face 100a relative to the second surface 230b.

[0027] In this embodiment, the battery cell 100 has a bottom surface 100b and an end surface 100a disposed 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 1In this designation, 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, 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 arranged opposite to each other in the thickness direction. One of the first surface 230a and the second surface 230b faces the end surface 100a. When the size of the battery cell 100 along the preset direction D1 is fixed, the sum of the sizes of the battery cell 100 and the printed circuit board 230 in the preset direction D1 can be made smaller, which is beneficial to the miniaturization 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 fixed, one of the first surface 230a and the second surface 230b of the printed circuit board 230 faces the end face 100a, thereby making the size of the cell 100 in the preset direction D1 longer, which is beneficial to increasing the capacity of the battery assembly 10.

[0028] Understandably, in another embodiment, the preset direction D1 is the width direction of the battery cell 100. When the preset 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, 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 arranged 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 fixed, the sum of the sizes of the battery cell 100 and the printed circuit board 230 in the preset direction D1 can be smaller, which is beneficial to the 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 fixed, one of the first surface 230a and the second surface 230b of the printed circuit board 230 faces the end face 100a, thereby making the size of the cell 100 in the preset direction D1 longer, which is beneficial to increasing the capacity of the battery assembly 10.

[0029] In one embodiment, the protection circuit 240 includes a plurality of electronic devices. The plurality of electronic devices 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, it is illustrated by taking an example where a portion of the plurality of electronic devices is disposed on the first surface 230a of the printed circuit board 230, and another portion of the plurality of electronic devices is disposed on the second surface 230b. Compared to the protection circuit 240 having its plurality of electronic devices disposed on only one of the first surface 230a and the second surface 230b, when a portion of the plurality of electronic devices 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 devices 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, and the size of the printed circuit board 230 can be reduced.

[0030] Please see Figure 1 and Figure 5 ,and Figure 2 and Figure 6 , Figure 5 A schematic diagram of a battery assembly provided for another embodiment of this application; Figure 6 for Figure 5 The diagram shows another perspective view of the battery assembly. In this embodiment, the battery assembly 10 further includes a retainer 300 that secures the printed circuit board 230 and the battery cell 100.

[0031] The fixing member 300 can be, but is not limited to, plastic. In one embodiment, the printed circuit board 230 and the battery cell 100 can be fixed by injection molding. The battery assembly 10 provided in this application embodiment further includes a fixing member 300, which fixes the printed circuit board 230 and the battery cell 100, preventing the printed circuit board 230 from opening relative to the battery cell 100, thus making the structure of the battery assembly 10 more compact.

[0032] Furthermore, in one embodiment, the fastener 300 encloses a portion of the battery cell 100 and at least a portion of the printed circuit board 230.

[0033] Furthermore, the fastener 300 provides a sealed connection between at least a portion of the printed circuit board 230 and the battery cell 100. For example, when the printed circuit board 230 and the battery cell 100 are fixed by injection molding, the fastener 300, while fixing the printed circuit board 230 and the battery cell 100, can also wrap around a portion of the battery cell 100 and at least a portion of the printed circuit board 230 to seal at least a portion of the printed circuit board 230. This, on the one hand, further strengthens the fixation between the printed circuit board 230 and the battery cell 100; on the other hand, it can reduce or even prevent external dust or water from entering the printed circuit board 230 or the electronic components of the protection circuit 240, thereby extending the service life of the protection circuit 240.

[0034] Understandably, in other embodiments, the fastener 300 may not enclose the battery cell 100, or the fastener 300 may not include the printed circuit board 230. The fastener 300 is sufficient to secure the printed circuit board 230 to the battery cell 100.

[0035] The various forms of the battery assembly 10 provided in the embodiments of this application will now be described in detail. It should be noted that the schematic diagrams of the battery assembly 10 provided in the various embodiments of this application (such as the first to fourteenth embodiments) 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 connectors 210, and the connection relationship between the second polarity tabs 120 and the second connectors 220. The dimensions of each component in the schematic diagrams of the battery assembly 10 provided in the various embodiments of this application (such as the first to fourteenth embodiments) should not be interpreted as the dimensions of the components in the actual product, and the dimensional ratio between any two related components should not be interpreted as the actual dimensional ratio of the battery assembly 10.

[0036] Please refer to the following: Figure 7 and Figure 8 , Figure 7 A schematic diagram of a battery assembly provided in the first embodiment of this application; Figure 8This is a schematic diagram of a battery assembly provided in the second embodiment of this application. In this embodiment, the protection board 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.

[0037] exist Figure 7 In this example, the first polarity is taken as the positive electrode, i.e., the first polarity tab 110 is the positive electrode tab; and the second polarity is taken as the negative electrode, i.e., the second polarity tab 120 is the negative electrode 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. Furthermore, in 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 tabs and the second connector 220.

[0038] exist Figure 8 In this example, the first polarity is taken as the positive electrode, i.e., the first polarity tab 110 is the positive electrode tab; and the second polarity is taken as the negative electrode, i.e., the second polarity tab 120 is the negative electrode 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. Furthermore, in 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.

[0039] In this embodiment, two first polarity tabs 110 are disposed on one side of the two second polarity tabs 120, thus 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 called a conductive wire) can be used to connect to the first connector 210. This results in shorter wires and lower wire resistance when the two first polarity tabs 110 are electrically connected to the same first connector 210.

[0040] Accordingly, in the battery assembly 10 provided in this application embodiment, two second polarity tabs 120 are disposed on one side of the two first polarity tabs 110, thus 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, a relatively short wire can be used to connect them to the same second connector 220. In this way, the required wire is shorter and the wire resistance is lower when the two second polarity tabs 120 are electrically connected to the same second connector 220.

[0041] In the battery assembly 10 provided in this application embodiment, 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 second polarity tabs 120 are disposed on one side of the two first polarity tabs 110. A first connector 210 is electrically connected to the two first polarity tabs 110, and a 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 tabs 110. Therefore, a relatively short wire is required to achieve electrical connection between the two first polarity tabs 110 and the first connector 210. Correspondingly, a relatively short wire is required to achieve electrical connection between the two second polarity tabs 120 and the second connector 220. Therefore, in the battery assembly 10 provided in this application embodiment, the first connector 210 is used to electrically connect to the two first polarity tabs 110, and the second connector 220 is used to electrically connect to the two second polarity tabs 120. The two second polarity tabs 120 are disposed on one side of the two first polarity tabs 110, thereby making the line resistance of the protection board assembly 200 smaller.

[0042] Further, 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. 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, please refer to Figure 7The 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 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 the second path). Therefore, the protection circuit 240 of the battery assembly 10 of this application is located in a single path, and thus, 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 connected to the protection circuit 240 by complex wiring; 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 connected to the protection circuit 240 by complex wiring, thus further reducing the line resistance of the protection board assembly 200.

[0043] Please refer to further information. 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 each other, and the two first polarity tabs 110 are electrically connected to the first connector 210 through the same wire.

[0044] In this embodiment, the two first polarity tabs 110 are disposed on one side of the second polarity tab 120, thus 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 through 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 lower.

[0045] In one embodiment, when the two first polarity tabs 110 are connected together, they can be connected together via a connector and then electrically connected to the first connector 210 via a flexible circuit board. The connector can be, but is not limited to, solder pads or connecting wires of a protection board. Therefore, compared to each first polarity tab 110 using a separate wire to be electrically connected to the first connector 210, the battery assembly 10 provided in this application allows the two first polarity tabs 110 to be electrically connected to the first connector 210 via the same wire. This reduces the line resistance between the two first polarity tabs 110 and the first connector 210 and simplifies the wiring layout between the two first polarity tabs 110 and the first connector 210.

[0046] Accordingly, please continue reading Figure 7The two second polarity tabs 120 are connected together and then electrically connected to the second connector 220 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 second connector 220, the printed circuit board 230 and the second connector 220 can be electrically connected through wires. Therefore, compared to each second polarity tab 120 using a separate wire to be electrically connected to the second connector 220, the battery assembly 10 provided in this embodiment, where the two second polarity tabs 120 are connected together and then electrically connected to the second connector 220 through 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 simpler.

[0047] In this embodiment, please refer to 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 each other, and the two second polarity tabs 120 are electrically connected to the second connector 220 through the same wire.

[0048] In this embodiment, the two second polarity electrodes are disposed on one side of the two first polarity electrodes, thus 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 through 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 lower.

[0049] In one embodiment, when the two second polarity tabs 120 are connected together, they can be connected together via a connector and then electrically connected to the second connector 220 via a flexible circuit board. The connector can be, but is not limited to, solder pads or connecting wires of a protection board. Therefore, compared to each second polarity tab 120 using a separate wire to be electrically connected to the second connector 220, the battery assembly 10 provided in this application allows the two second polarity tabs 120 to be electrically connected to the second connector 220 via the same wire. This reduces the line resistance between the two second polarity tabs 120 and the second connector 220 and simplifies the wiring layout between the two second polarity tabs 120 and the second connector 220.

[0050] Accordingly, please continue reading Figure 8The 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 through wires. Therefore, compared to each first polarity tab 110 using a separate wire to be electrically connected to the first connector 210, the battery assembly 10 provided in this 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 simpler.

[0051] Please refer to the following: Figure 9 and Figure 10 , Figure 9 A schematic diagram of a battery assembly provided in the third embodiment of this application; Figure 10 This is a schematic diagram of a battery assembly provided according to the fourth embodiment of this application. Figure 9 and Figure 10 In a corresponding embodiment, the protection board assembly 200 includes a first connector 210 and a second connector 220. Correspondingly, 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.

[0052] exist Figure 9 and Figure 10 In this illustration, the first polarity is taken as the positive electrode, i.e., the first polarity tab 110 is the positive electrode tab; and the second polarity is taken as the negative electrode, i.e., the second polarity tab 120 is the negative electrode tab. It can be understood that... Figure 9 and Figure 10 This also applies to implementations where the first polarity is negative, i.e., the first polarity tab 110 is the negative tab; and the second polarity is positive, with the second polarity tab 120 being the positive tab. 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. Figure 10 In this circuit, the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210. Figure 9In this circuit, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220.

[0053] In the battery assembly 10 provided in this application embodiment, the battery cell 100 includes a first polarity tab 110 and a second polarity electrode. 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. 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. Therefore, the battery assembly 10 provided in this application embodiment has a first connector 210 for electrically connecting to the first polarity tab 110 and a second connector 220 for electrically connecting to the second polarity tab 120, thereby making the line resistance of the protection board assembly 200 smaller.

[0054] 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 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 the second path). Therefore, the protection circuit 240 of the battery assembly 10 of this application is located in a single path, and thus, the protection circuit 240 is also referred to as 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 connected to the protection circuit 240 by complex wiring; 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 connected to the protection circuit 240 by complex wiring, thus further reducing the line resistance of the protection board assembly 200.

[0055] Please refer to the following: Figure 11 , Figure 12 , Figure 13 and Figure 14 , Figure 11 A schematic diagram of a battery assembly provided in the fifth embodiment of this application; Figure 12A schematic diagram of a battery assembly provided in the sixth embodiment of this application; Figure 13 A schematic diagram of a battery assembly provided in the seventh embodiment of this application; Figure 14 This is a schematic diagram of a battery assembly provided in the eighth embodiment of this application. The protection board assembly 200 includes a first connector 210 and a second connector 220. The battery cell 100 includes a first polarity tab 110 and two adjacent and spaced-apart second polarity tabs 120. 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 the two second polarity tabs 120 are electrically connected to the same second connector 220.

[0056] In this embodiment, the first polarity is used as the positive electrode and the second polarity as the negative electrode for illustration. Please refer to the corresponding battery assembly 10. Figure 11 and Figure 12 As described above, the protection circuit 240 is located on the printed circuit board 230, and 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 [link to relevant documentation]. Figure 11 The battery assembly 10 is shown; when the protection circuit 240 is located between the first polarity tab 110 and the first connector 210, please refer to [reference needed]. Figure 12 The battery assembly 10 shown.

[0057] exist Figure 11 and Figure 12 In this 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 tabs 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 this application embodiment, 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.

[0058] Furthermore, the two second polarity tabs 120 are located on the same side of the first polarity tab 110, thus 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 through 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 lower.

[0059] Furthermore, the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210 (see [link]). Figure 12 Alternatively, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220 (see [link]). 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 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 the second path). Therefore, the protection circuit 240 of the battery assembly 10 of this application is located in a single path, and thus, 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 connected to the protection circuit 240 by complex wiring; 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 connected to the protection circuit 240 by complex wiring, thus further reducing the line resistance of the protection board assembly 200.

[0060] When the first polarity is negative and the second polarity is positive, please refer to the corresponding battery assembly 10. Figure 13 and Figure 14 As described above, the protection circuit 240 is located on the printed circuit board 230, and 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 [link to relevant documentation]. Figure 13 The battery assembly 10 is shown; when the protection circuit 240 is located between the first polarity tab 110 and the first connector 210, please refer to [reference needed]. Figure 14 The battery assembly 10 shown.

[0061] exist Figure 13 and Figure 14In this 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 tabs 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 this application embodiment, 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.

[0062] In addition, Figure 13 and Figure 14 In this configuration, the two second polarity tabs 120 are located on the same side of the first polarity tab 110, thus 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 through 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 lower.

[0063] Furthermore, the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210 (see [link]). Figure 13 Alternatively, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220 (see [link]). 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 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 the second path). Therefore, the protection circuit 240 of the battery assembly 10 of this application is located in a single path, and thus, 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 connected to the protection circuit 240 by complex wiring; 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 connected to the protection circuit 240 by complex wiring, thus further reducing the line resistance of the protection board assembly 200.

[0064] Please see Figure 15 and Figure 16 , Figure 15 A schematic diagram of a battery assembly provided in the ninth embodiment of this application; Figure 16 This is a schematic diagram of a battery assembly provided in the tenth embodiment of this application. The protection board assembly 200 includes two first connectors 210 and one 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, 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.

[0065] In this embodiment, the first polarity is shown as positive and the second polarity as negative. 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, when the protection circuit 240 is located between the second polarity tab 120 and the second connector 220, please refer to [link to relevant documentation]. Figure 15 The battery assembly 10 is shown; when the protection circuit 240 is located between the first polarity tab 110 and the first connector 210, please refer to [reference needed]. Figure 16 The battery assembly 10 is shown. Understandably, if the first polarity is negative, 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, the protection circuit 240 is located between the two positive tabs and the connectors connected to the two positive tabs; or, the protection circuit 240 is located between the two negative tabs and the connectors connected to the two negative tabs.

[0066] 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. 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, by providing a shorter first wire 271 in the protection board assembly 200, the two first polarity tabs 110 can be electrically connected to one of the two first connectors 210, and by providing a shorter second wire 272, the two first polarity tabs 110 can be electrically connected to the other of the two first connectors 210. Correspondingly, by providing a shorter conductive wire in the protection board assembly 200, the second polarity tab 120 and the second connector 220 can be electrically connected. Therefore, it can be seen that the two first polarity tabs 110 of the battery assembly 10 provided in this application embodiment 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, and the two first polarity tabs 110 are electrically connected to the other of the two first connectors 210 through a second wire 272. The second connector 220 is used to be electrically connected to the two second polarity tabs 120, thereby making the line resistance of the protection board assembly 200 smaller.

[0067] Furthermore, the battery assembly 10 provided in this application includes two first connectors 210 and one second connector 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 supply power to the electrical devices in the electronic device 1, the electrical devices can be electrically connected to either of the two first connectors 210 and the second connector 220, thereby facilitating the electrical connection between the electrical devices and the battery assembly 10.

[0068] Furthermore, the two second polarity tabs 120 are located on the same side of the first polarity tab 110, thus 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 through 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 lower.

[0069] Furthermore, the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210 (see [link]). Figure 16Alternatively, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220 (see [link]). 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 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 the second path). Therefore, the protection circuit 240 of the battery assembly 10 of this application is located in a single path, and thus, 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 connected to the protection circuit 240 by complex wiring; 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 connected to the protection circuit 240 by complex wiring, thus further reducing the line resistance of the protection board assembly 200.

[0070] Please see Figure 17 and Figure 18 , Figure 17 A schematic diagram of the battery assembly provided in the eleventh embodiment of this application; Figure 18 This is a schematic diagram of a battery assembly provided in the twelfth embodiment of this application. In this embodiment, the protection board assembly 200 includes two first connectors 210 and two second connectors 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, 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.

[0071] In this embodiment, the first polarity is illustrated as the positive electrode and the second polarity as the negative electrode. It can be understood that... Figure 17 and Figure 18This also applies to cases 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 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 The battery assembly 10 is shown; when the protection circuit 240 is located between the first polarity tab 110 and the first connector 210, please refer to [reference needed]. Figure 18 The battery assembly 10 shown.

[0072] 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. The two second polarity tabs 120 are electrically connected to one of the two second connectors 220 via a third wire 273. The two second polarity tabs 120 are electrically connected to the other of the two second connectors 220 via 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, in the protection board assembly 200, a shorter first wire 271 can be provided 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, in the protection board assembly 200, a shorter third wire 273 can be provided 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. Therefore, in the battery assembly 10 provided in this application embodiment, 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 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, thereby making the line resistance of the protection board assembly 200 smaller.

[0073] Furthermore, the battery assembly 10 provided in this 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 supply power to the electrical devices in the electronic device 1, the electrical devices can be electrically connected to either of the two first connectors 210 and either of the two second connectors 220, thereby facilitating the electrical connection between the electrical devices and the battery assembly 10.

[0074] Furthermore, the two second polarity tabs 120 are located on the same side of the two first polarity tabs 110, therefore, the two second polarity tabs 120 are relatively close together. The connector required to connect the two second polarity tabs 120 together has a shorter length, and the wire resistance of the connector connecting the two second polarity tabs 120 together is lower.

[0075] Furthermore, the protection circuit 240 is electrically connected between the first polarity tab 110 and the first connector 210 (see [link]). Figure 18 Alternatively, the protection circuit 240 is electrically connected between the second polarity tab 120 and the second connector 220 (see [link]). 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 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 the second path). Therefore, the protection circuit 240 of the battery assembly 10 of this application is located in a single path, and thus, 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 connected to the protection circuit 240 by complex wiring; 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 connected to the protection circuit 240 by complex wiring, thus further reducing the line resistance of the protection board assembly 200.

[0076] Please see Figure 19 and Figure 20 , Figure 19 A schematic diagram of the battery assembly provided in the thirteenth embodiment of this application; Figure 20 This is a schematic diagram of a battery assembly provided according to the fourteenth embodiment of this application. The battery cell 100 includes two sub-cells 11. Each sub-cell 11 includes a positive electrode tab and a negative electrode tab. 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 sub-cell 11 is adjacent to and electrically connected to the negative electrode tab of the first sub-cell 11. The negative electrode tab of the other sub-cell 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.

[0077] In this embodiment, for ease of description, the two sub-cells 11 are designated as sub-cell 11a and sub-cell 11b, respectively. 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.

[0078] In this embodiment, the positive terminal of one of the two sub-cells 11 (sub-cell 11a) is used as the first polarity tab 110 of the cell 100, and the negative terminal of the other of the two sub-cells 11 (sub-cell 11b) is used as the second polarity tab 120 of the cell 100. It should be understood that this should not be construed as a limitation on the embodiments of this application.

[0079] The positive electrode of one of the two sub-cells 11 serves as one of the first polarity electrode 110 and the second polarity electrode 120, and the negative electrode of the other sub-cell 11 serves as the other of the first polarity electrode 110 and the second polarity electrode 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 electrode 110, and the second connector 220 is electrically connected to the second polarity electrode 120. The first connector 210 is not electrically connected to the second polarity electrode 120, and the second connector 220 is not electrically connected to the first polarity electrode 110. Therefore, the protection board assembly 200 can have shorter wires electrically connecting the first connector 210 and the first polarity electrode 110, and shorter wires electrically connecting the second connector 220 and the second polarity electrode 120, thereby reducing the line resistance of the protection board assembly 200.

[0080] 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 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 the second path). Therefore, the protection circuit 240 of the battery assembly 10 of this application is located in a single path, and thus, the protection circuit 240 is also referred to as 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 connected to the protection circuit 240 by complex wiring; 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 connected to the protection circuit 240 by complex wiring, thus further reducing the line resistance of the protection board assembly 200.

[0081] In this embodiment, the positive electrode tab of one of the two sub-cells 11 is adjacent to and electrically connected to the negative electrode tab of the other 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 other of the two sub-cells 11. Furthermore, the cell 100 provided in this embodiment includes two sub-cells 11, thereby enabling the cell 100 to have a larger capacity.

[0082] Further, please refer to Figure 1 , Figure 2 The protection board 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.

[0083] 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, and when the battery assembly 10 is applied in the electronic device 1, the first flexible circuit board 250 can be positioned 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, and when the battery assembly 10 is applied in the electronic device 1, the second flexible circuit board 260 can be positioned 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.

[0084] Please see Figure 5 , Figure 21 and Figure 22 , Figure 21 A schematic diagram of a battery assembly provided according to one embodiment of this application; Figure 22 for Figure 21 This is a schematic diagram of the battery assembly from another perspective. Compared to... Figure 5 The battery assembly 10 shown in this embodiment further includes at least one of a packaging film 500 and an easy-tear paper 600. When the battery assembly 10 includes the packaging film 500, the packaging film 500 covers the battery cell 100 for encapsulating the battery cell 100, and the first polarity tab 110 and the second polarity tab 120 are exposed outside the packaging film 500. When the battery assembly 10 also includes the easy-tear paper 600, the easy-tear paper 600 is disposed on the outside of the battery cell 100 for removing the battery assembly 10 from the electronic device 1 to which the battery assembly 10 is applied.

[0085] In the schematic diagram of this embodiment, the battery assembly 10 includes a packaging film 500 and an easy-tear paper 600 as an example. It should be understood that this should not be construed as a limitation on the battery assembly 10 provided in the embodiments of this application.

[0086] The battery assembly 10 provided in this application embodiment includes a packaging film 500 that packages and encapsulates the battery cell 100. The packaging film 500 may also be referred to as a battery encapsulation sticker.

[0087] 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 the user to remove the battery assembly 10 from the electronic device 1 to which the battery assembly 10 is applied.

[0088] In one embodiment, a portion of the tear-off paper 600 is fixed to the outside of the battery cell 100, while another portion 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 is used for a user to hold. When the battery assembly 10 is installed in the electronic device 1, the gripping portion of the tear-off paper 600 is used for a user to remove the battery assembly 10 from the electronic device 1 to which the battery assembly 10 is applied.

[0089] Please see Figure 23 and Figure 24 , Figure 23 A schematic diagram of a protection circuit for a battery assembly provided in one embodiment of this application; Figure 24 This is a schematic diagram of a protection circuit for a battery assembly provided in another embodiment of this application. The protection circuit 240 in the battery assembly 10 provided in this embodiment is integrated with... Figure 7 The first embodiment of the battery assembly 10 is used as an example for illustration. It should be understood that this should not be construed as a limitation on the protection circuit 240 provided in the embodiments of this application. The protection circuit 240 can be incorporated into the battery assembly 10 provided in any of the preceding embodiments.

[0090] For ease of description, the tabs connected to the protection circuit 240 are named target tabs, and the connectors connected to the protection circuit 240 are named target connectors; the tabs not connected to the protection circuit 240 are named non-target tabs, and the connectors connected to the protection circuit 240 are named non-target connectors.

[0091] 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.

[0092] Understandably, in other embodiments, if the tab connected to the protection circuit 240 is a first polarity tab 110 and the connector connected to the protection circuit 240 is a first polarity connector, then the first polarity tab 110 is a target tab and the first connector 210 is a target connector; correspondingly, the second polarity tab 120 is a non-target tab and the second connector 220 is a non-target connector.

[0093] 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.

[0094] The detection resistor R1 is a current sensing module; therefore, 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 MOSFET, also known as a protection MOSFET.

[0095] In this embodiment, if the detected voltage is greater than or equal to the first threshold voltage, it indicates that the battery assembly 10 is malfunctioning. Since the first switch S1 is connected in series between the target tab and the target connector, if the detected voltage is greater than or equal to the first threshold voltage, the first control chip U1 controls the first switch S1 to open, thus disconnecting the target connector from the target tab. When the battery assembly 10 receives external charging voltage or charging current, the first control chip U1 controls the first switch S1 to open, preventing the battery cell 100 from continuing to receive external charging voltage or 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 a device, the first control chip U1 controls the first switch S1 to open, preventing the battery cell 100 from continuing to power the device through the target tab and the target connector, thereby ensuring the safety of the device.

[0096] Understandably, if the detected voltage is less than the first threshold voltage, the first control chip U1 controls the first switch S1 to turn on. When the first switch S1 is included between the target tab and the target connector but not other switches, the first control chip U1 controls the first switch S1 to turn on, and the battery assembly 10 can receive external charging voltage or charging current to the cell 100; when the battery assembly 10 supplies power to the electrical device, the cell 100 can supply power to the electrical device.

[0097] Further, please refer to Figure 24 The embodiments of this application also include 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 electrode and the target connector. If the detected voltage is greater than or equal to a second threshold voltage, the second control chip U2 controls the second switch S2 to open, wherein the second threshold voltage is greater than the first threshold voltage.

[0098] exist Figure 23 The protection circuit 240 shown is illustrated by an example where the second switch S2 is closer to the target electrode 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.

[0099] The second switch S2 may include, but is not limited to, a MOSFET, also known as a protection MOSFET, or a protection MOSFET.

[0100] In this embodiment, if the detected voltage is greater than or equal to the second threshold voltage, it indicates that the battery assembly 10 is malfunctioning. Since the second switch S2 is connected in series between the target tab and the target connector, if the detected voltage is greater than or equal to the second threshold voltage, the second control chip U2 controls the second switch S2 to open, thus disconnecting the target connector from the target tab. When the battery assembly 10 receives external charging voltage or charging current, the second control chip U2 controls the second switch S2 to open, preventing the battery cell 100 from continuing to receive external charging voltage or 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 a device, the second control chip U2 controls the second switch S2 to open, preventing the battery cell 100 from continuing to power the device through the target tab and the target connector, thereby ensuring the safety of the device.

[0101] The protection circuit 240 provided in this application embodiment, when the first sub-protection circuit 241 fails or malfunctions due to various reasons, if the detected 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 open, thereby ensuring the safety of the battery assembly 10 when it is charging; it can also ensure the safety of the electrical device when the battery assembly 10 supplies power to the electrical device.

[0102] Understandably, in Figure 23 and Figure 24 The protection circuit 240 shown is illustrated by taking the protection circuit 240 including a detection resistor R1, a first sub-protection circuit 241 and a second sub-protection circuit 242 as an example. It can be understood that in other embodiments, the protection circuit 240 may include the detection resistor R1 and the first sub-protection circuit 241, but may not include the second sub-protection circuit 242.

[0103] Please refer to the following: Figure 23 or Figure 24 ,and Figure 25 , Figure 25 This is a circuit diagram of a protection circuit in a battery assembly provided according to 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.

[0104] In this embodiment, the protection circuit 240 includes two detection resistors R1 connected in parallel. Therefore, the resistance value of the two detection resistors R1 connected in parallel is less than the resistance value of either individual detection resistor R1. For ease of illustration, in... Figure 25 In the diagram, the two sensing resistors are labeled RS1 and RS2, respectively. Therefore, the protection circuit 240 includes two sensing resistors R1, which allows the resistance value of the sensing resistors R1 to be relatively small, thus making the changes in the sensing current across the two parallel sensing resistors R1 more sensitive. Furthermore, the detection circuit includes two sensing resistors R1, ensuring that even if one sensing resistor R1 fails, the other sensing resistor R1 remains, thereby guaranteeing the detection current or the detection voltage.

[0105] Furthermore, in the battery assembly 10 provided in this application embodiment, the protection circuit 240 includes two detection resistors R1. The resistance value of the two detection resistors R1 connected in parallel is less than the resistance value of either of the two detection resistors R1, which can also reduce the energy loss caused by setting the detection resistors R1 in the battery assembly 10.

[0106] In this embodiment, the first sub-protection circuit 241 includes two first switches S1 connected in parallel. The resistance value of the two first switches S1 connected in parallel is less than the resistance value of either of the two first switches S1. This helps to reduce the energy loss caused by the first switches S1 in the battery assembly 10. Figure 25 In the diagram, the two first switches are labeled Q1 and Q3, respectively.

[0107] 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 diagram, corresponding to each port of the first control chip U1, port "1" represents the first port, port "2" represents the second port, port "3" represents the third port, port "4" represents the fourth port, port "5" represents the fifth port, and port "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 (labeled VSS in the diagram). The sixth port is electrically connected to the other end of the detection resistor R1 (labeled CS in the diagram), and 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.

[0108] In this embodiment, the fifth port is a power supply port (i.e., VDD port), the fourth port is a ground port (i.e., GND port), and the sixth port is a detection voltage signal receiving port, used to receive the detection voltage of the detection resistor R1.

[0109] In this implementation, the electrical connection between the first control chip U1, the detection resistor R1, and the two first switches S1 is simple and easy to implement, making it convenient to control the state of the first switch S1 based on the detection voltage of the detection resistor R1.

[0110] Furthermore, in this embodiment, the protection circuit 240 further includes a first voltage-regulating resistor R6 and a first filter capacitor (labeled C11 and C6 in the figure). One end of the first voltage-regulating resistor R6 is electrically connected to the non-target electrode, and the other end of the first voltage-regulating 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-regulating 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.

[0111] The resistance value of the first voltage-regulating resistor R6 is typically in the kiloohm (KΩ) or megaohm (MΩ) range. The first voltage-regulating resistor R6 stabilizes the current of the printed circuit board 230. The first filter capacitor filters out current spikes, thus stabilizing the voltage.

[0112] Therefore, the protection circuit 240 provided in this application embodiment also includes a first voltage regulator R6 and a first filter capacitor. The first voltage regulator R6 and the first filter capacitor cooperate with each other to stabilize the voltage and current of the printed circuit board 230.

[0113] When the battery assembly 10 receives external charging voltage or charging current, it stabilizes the voltage and current, thus ensuring a smoother charging process for the battery cell 100. When the battery assembly 10 supplies power to electrical devices, it also provides a stable voltage and current, reducing or even preventing damage to the devices caused by unstable voltage and current.

[0114] In this embodiment, the first filter capacitor includes two first sub-capacitors connected in series, and the two first sub-capacitors are respectively identified as C11 and C6.

[0115] The battery assembly 10 provided in this embodiment includes a first filter capacitor comprising two first sub-capacitors connected in series. The capacitance values ​​of the two first sub-capacitors may be the same or different, and this embodiment does not limit the capacitance values.

[0116] The battery assembly 10 provided in this application embodiment includes two first sub-capacitors connected in series with the first filter capacitor, thereby enabling the first filter capacitor to have a relatively large capacitance, which can better remove glitches in the current and better stabilize the voltage.

[0117] The second sub-protection circuit 242 provided in the embodiments of this application will now be described in detail.

[0118] The second sub-protection circuit 242 includes two second switches connected in parallel. The two second switches... Figure 25 They are labeled Q2 and Q4 respectively.

[0119] In this embodiment, the second sub-protection circuit 242 includes two second switches connected in parallel. The resistance value of the two second switches connected in parallel is less than the resistance value of either of the two second switches. This helps to reduce the energy loss caused by the second switches in the battery assembly 10.

[0120] Please continue reading. Figure 25The 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 diagram, at each port corresponding to the second control chip U2, pin "1" represents the first pin, pin "2" represents the second pin, pin "3" represents the third pin, pin "4" represents the fourth pin, pin "5" represents the fifth pin, and pin "6" represents the sixth pin. The fifth pin is electrically connected to the non-target tab. The fourth pin is electrically connected to one end of the detection resistor R1 (labeled VSS). The sixth pin is electrically connected to the other end of the detection resistor R1 (labeled CS in the diagram). 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.

[0121] 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.

[0122] In this embodiment, the fifth pin is a power supply pin (i.e., VDD pin), the fourth pin is a ground pin (i.e., GND pin), and the sixth pin is a detection voltage signal receiving pin, used to receive the detection voltage of the detection resistor R1.

[0123] In this implementation, the electrical connection between the second control chip U2, the detection resistor R1, and the two second switches S2 is simple and easy to implement, making it convenient to control the state of the second switch S2 according to the detection voltage of the detection resistor R1.

[0124] Furthermore, in this embodiment, the protection circuit 240 further includes a second voltage-regulating resistor R11 and a second filter capacitor (labeled C7 and C18 in the figure). One end of the second voltage-regulating resistor R11 is electrically connected to the non-target electrode, and the other end of the second voltage-regulating 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-regulating resistor R11, and the other end of the second filter capacitor is electrically connected to one end of the detection resistor R1. The other end of the second filter capacitor is also electrically connected to the fourth pin.

[0125] The resistance value of the second voltage-regulating resistor R11 is typically in the kiloohm (KΩ) or megaohm (MΩ) range. The second voltage-regulating resistor R11 stabilizes the current of the printed circuit board 230. The second filter capacitor filters out current spikes, thus stabilizing the voltage.

[0126] Therefore, the protection circuit 240 provided in this application embodiment also includes a second voltage regulator R11 and a second filter capacitor. The second voltage regulator R11 and the second filter capacitor cooperate with each other to stabilize the voltage and current of the printed circuit board 230.

[0127] When the battery assembly 10 receives external charging voltage or charging current, it stabilizes the voltage and current, thus ensuring a smoother charging process for the battery cell 100. When the battery assembly 10 supplies power to electrical devices, it also provides a stable voltage and current, reducing or even preventing damage to the devices caused by unstable voltage and current.

[0128] In this embodiment, the second filter capacitor includes two second sub-capacitors connected in series. These two second sub-capacitors are labeled C7 and C18 in the figure.

[0129] The battery assembly 10 provided in this embodiment includes two second sub-capacitors connected in series in the second filter capacitor. The capacitance values ​​of the two second sub-capacitors may be the same or different, and this embodiment does not limit this.

[0130] The battery assembly 10 provided in this application embodiment includes two second sub-capacitors connected in series in the second filter capacitor, thereby enabling the second filter capacitor to have a relatively large capacitance, which can better remove glitches in the current and better stabilize the voltage.

[0131] Please continue reading. Figure 25 The protection circuit 240 further includes a fuel gauge unit 244. The fuel gauge unit 244 is used to calculate the amount of electricity charged to the battery cell 100.

[0132] The protection circuit 240 further includes a fuel gauge unit 244, which calculates the amount of charge received by the battery cell 100. When the battery assembly 10 is used in the electronic device 1, the fuel gauge unit 244 is also electrically connected to the processor of the electronic device 1 so that the processor can read the amount of charge calculated by the fuel gauge unit 244 and display it. For example, the processor of the electronic device 1 in which the battery assembly 10 is used can display the amount of charge calculated by the fuel gauge unit 244 on the display screen 50 of the electronic device 1 in the form of icons or numbers.

[0133] Please see Figure 26 , Figure 26 This is a schematic diagram of a protection circuit for a battery assembly provided in another embodiment of this application. In this embodiment, for ease of description, 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.

[0134] 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.

[0135] Understandably, in other embodiments, if the tab connected to the protection circuit 240 is a first polarity tab 110 and the connector connected to the protection circuit 240 is a first polarity connector, then the first polarity tab 110 is a target tab and the first connector 210 is a target connector; correspondingly, the second polarity tab 120 is a non-target tab and the second connector 220 is a non-target connector.

[0136] 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.

[0137] The detection resistor R1 is a current sensing module; therefore, 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, also known as a protection MOS or a protection MOS transistor.

[0138] In this embodiment, if the detected voltage is greater than or equal to the first threshold voltage, it indicates that the battery assembly 10 is malfunctioning. Since the first switch S1 is connected in series between the target tab and the target connector, if the detected voltage is greater than or equal to the first threshold voltage, the first control chip U1 controls the first switch S1 to open, thus disconnecting the target connector from the target tab. When the battery assembly 10 receives external charging voltage or charging current, the first control chip U1 controls the first switch S1 to open, preventing the battery cell 100 from continuing to receive external charging voltage or 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 a device, the first control chip U1 controls the first switch S1 to open, preventing the battery cell 100 from continuing to power the device through the target tab and the target connector, thereby ensuring the safety of the device.

[0139] Understandably, if the detected voltage is less than the first threshold voltage, the first control chip U1 controls the first switch S1 to turn on. When the first switch S1 is included between the target tab and the target connector but not other switches, the first control chip U1 controls the first switch S1 to turn on, and the battery assembly 10 can receive external charging voltage or charging current to the cell 100; when the battery assembly 10 supplies power to the electrical device, the cell 100 can supply power to the electrical device.

[0140] 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 detected voltage is greater than or equal to the first threshold, the second sub-protection circuit 242 is disconnected.

[0141] In the schematic diagram of this embodiment, the second sub-protection circuit 242 is shown to be closer to the target electrode than the detection resistor R1. It should be understood that this should not be construed as a limitation on the embodiment of this application, as long as the second sub-protection circuit 242 is connected in series between the target electrode and the target connector.

[0142] In this embodiment, the second sub-protection circuit 242 includes a positive temperature coefficient thermistor (PTC) or a fuse. In this embodiment, when the detected voltage is greater than or equal to the first threshold, the second sub-protection circuit 242 is disconnected, and the target electrode tab is disconnected from the target connector.

[0143] This application implements a battery assembly 10 according to one embodiment. For a battery assembly 10 with a multi-tab structure, the protection circuit 240 is located on the printed circuit board 230 and 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; that is, the protection circuit 240 adopts a single conductive loop, which makes the design of the printed circuit board 230 (also called the protection board) in the battery assembly 10 simpler and can significantly reduce the impedance of the printed circuit board 230 (also called the protection board).

[0144] In summary, this application proposes a novel low-complexity, low-impedance battery assembly 10 (also known as a battery module) solution for multi-tab battery solutions.

[0145] In the battery assembly 10 provided in this application embodiment, the protection circuit 240 is exemplified by being integrated 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 integrated 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 integrated into a battery assembly 10 with four tabs and two connectors (the two connectors being the first connector 210 and the second connector 220, which are also called battery interfaces).

[0146] Understandably, the battery assembly 10 solution provided in this application, with its protection circuit 240 employing a single conductive loop design, can be extended to other battery assembly 10 structures, such as those with two or three tabs, or even those with five tabs. The single conductive loop design of the protection circuit 240 can also be extended to battery assembly 10 solutions with other numbers of battery interfaces (also called interfaces), such as those with three or four battery interfaces. In other words, this application does not limit the number of first polarity tabs 110, second polarity tabs 120, first connectors 210, and second connectors 220 included in the battery assembly 10, as long as the protection circuit 240 employs a single conductive loop; or, 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.

[0147] This application provides an electronic device 1 according to one embodiment. The electronic device 1 includes, but is not limited to, devices capable of transmitting and receiving electromagnetic wave signals such as mobile phones, telephones, televisions, tablets, personal computers, laptops (PCs), in-vehicle devices, headphones, watches, and wearable devices. In the schematic diagrams of this application embodiment, a mobile phone is used as an example for illustration; it should be understood that this should not be construed as a limitation on the electronic device 1 provided in this application embodiment. The electronic device 1 provided in this application embodiment will be described below.

[0148] Please refer to the following: Figure 27 and Figure 28 , Figure 27 A schematic diagram of an electronic device provided according to one embodiment of this application; Figure 28 for Figure 27 The diagram shows a partial structural schematic of the electronic device 1. The electronic device 1 includes a battery assembly 10. The battery assembly 10 has been described previously and will not be repeated here.

[0149] Please see Figure 27 The electronic device 1 provided in one embodiment of this application further includes a mid-frame 30, a display screen 50, and a back cover 60. The display screen 50 is disposed on one side of the mid-frame 30. The display screen 50 is the component in the electronic device 1 that implements the display function. When the electronic device 1 is in portrait mode, the display screen 50 of the electronic device 1 faces the user. The back cover 60 is disposed on the other side of the mid-frame 30. In other words, the back cover 60 and the display screen 50 are respectively disposed on opposite sides of the mid-frame 30. The back cover 60 cooperates with the mid-frame 30 to form a receiving space to receive the functional components of the electronic device 1, such as a rear camera, a battery assembly 10, etc. It should be understood that the description of other components in the electronic device 1 should not be construed as a limitation on the battery assembly 10 in the electronic device 1 provided in this embodiment of the application.

[0150] Please see Figure 28 The electronic device 1 further includes a motherboard 70. In one embodiment, the battery assembly 10 and the motherboard 70 are disposed 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 mainboard 70 is located on the side of the protection circuit 240 board away from the battery cell 100.

[0151] In one embodiment, combined with Figure 1The battery cell 100 has a bottom surface 100b and an end surface 100a 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 side of the first surface 230a and the second surface 230b, away from the other of the first surface 230a and the second surface 230b.

[0152] In this embodiment, the first surface 230a faces the end face 100a, and the second surface 230b is opposite to the end face 100a relative to the first surface 230a. This should not be construed as a limitation on the battery assembly 10 provided in this application. In other embodiments, the second surface 230b faces the end face 100a, and the first surface 230a is opposite to the end face 100a relative to the second surface 230b. The bottom surface 100b and the end face 100a are arranged along a predetermined direction D1. In this embodiment, the first surface 230a faces the end face 100a, and the main board 70 is disposed on the side of the second surface 230b opposite to the first surface 230a.

[0153] In this embodiment, the battery cell 100 has a bottom surface 100b and an end surface 100a disposed 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. 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, 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 arranged opposite to each other in the thickness direction. One of the first surface 230a and the second surface 230b faces the end face 100a. When the size of the battery cell 100 along the preset direction D1 is fixed, the sum of the size of the battery cell 100 and the printed circuit board 230 in the preset direction D1 can be smaller, which is beneficial to the 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 fixed, if one of the first surface 230a and the second surface 230b of the printed circuit board 230 faces the end face 100a, the size of the battery cell 100 in the preset direction D1 can be longer, which is beneficial to increasing the capacity of the battery assembly 10.

[0154] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, and such improvements and refinements are also considered to be within the protection scope of this application.

Claims

1. A battery assembly, characterized in that, The battery assembly includes: A battery cell, the battery cell having a first polarity tab and a second polarity tab, wherein the first polarity and the second polarity are different; and A protection board assembly includes a first connector, a second connector, a printed circuit board, and a protection circuit. The first connector is electrically connected to a first polarity tab, and the second connector is electrically connected to a second polarity tab. The protection circuit is located on the printed circuit board and 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 as claimed in claim 1, characterized in that, The battery cell has an end face, and the first polarity tab and the second polarity tab are located on the end face; The printed circuit board has a first surface and a second surface disposed opposite to each other in the thickness direction, with one of the first surface and the second surface facing the end face.

3. The battery assembly as described in claim 2, characterized in that, The battery assembly also includes: A fastener is provided to secure the printed circuit board and the battery cell.

4. The battery assembly as described in claim 3, characterized in that, The fastener covers a portion of the battery cell and at least a portion of the printed circuit board.

5. The battery assembly as claimed in claim 1, characterized in that, The protection board assembly includes a first connector and a second connector; the battery cell includes: Two adjacent but spaced-apart first polarity tabs are electrically connected to the same first connector; and Two adjacent and spaced-apart 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 as claimed in claim 5, characterized in that, 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 each other, 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 each other, and the two first polarity tabs are electrically connected to the first connector through the same wire.

7. The battery assembly as claimed in claim 1, characterized in that, The protection board assembly includes a first connector and a second connector; the battery cell includes: A first polarity tab, the first polarity tab being electrically connected to the first connector; and A second polarity tab is electrically connected to the second connector.

8. The battery assembly as claimed in claim 1, characterized in that, The protection board assembly includes a first connector and a second connector; the battery cell includes: A first polarity tab, the first polarity tab being electrically connected to the first connector; and Two adjacent and spaced-apart second polarity tabs are located on the same side of the first polarity tab and are electrically connected to the same second connector.

9. The battery assembly as claimed in claim 1, characterized in that, The protection board assembly includes two first connectors and one second connector; the battery cell includes: Two first polarity tabs are arranged adjacently 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. The two first polarity tabs are electrically connected to the other of the two first connectors through a second wire. Two adjacent and spaced-apart 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 as claimed in claim 1, characterized in that, The protection board assembly includes two first connectors and two second connectors; the battery cell includes: Two first polarity tabs are arranged adjacently 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. The two first polarity tabs are electrically connected to the other of the two first connectors through a second wire. Two adjacent and spaced-apart second polarity tabs are electrically connected. The two second polarity tabs are located on one side of the two first polarity tabs. The two second polarity tabs are electrically connected to one of the two second connectors via a third wire, and the two second polarity tabs are electrically connected to the other of the two second connectors via a fourth wire.

11. The battery assembly as claimed in claim 1, characterized in that, The battery cell includes two sub-cells, each sub-cell including 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 sub-cell is adjacent to and electrically connected to the negative electrode tab of the first sub-cell. The negative electrode tab of the other sub-cell serves as the other of the first polarity tab and the second polarity tab. The protection board 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 as claimed in claim 1, characterized in that, The protection plate assembly also includes: A first flexible circuit board, wherein the first connector is electrically connected to the printed circuit board via the first flexible circuit board, and the printed circuit board is electrically connected to the first polarity tab; and The second flexible circuit board, the second connector is electrically connected to the printed circuit board via the second flexible circuit board, and the printed circuit board is electrically connected to the second polarity tab.

13. The battery assembly as claimed in claim 1, characterized in that, The battery assembly also 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 covers the battery cell for encapsulating the battery cell, and the first polarity tab and the second polarity tab are exposed by the packaging film; When the battery assembly also includes a tear-off sheet, the tear-off sheet is disposed on the outside of the battery cell 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 1-13, characterized in that, The tabs connected to the protection circuit are target tabs, and the connectors connected to the protection circuit are target connectors; the tabs not connected to the protection circuit are non-target tabs, and the connectors connected to the protection circuit are non-target connectors. The protection circuit includes a detection resistor and a first sub-protection circuit, the first sub-protection circuit including a first switch and a first control chip; The first switch is connected in series between the target electrode and the target connector; One end of the detection resistor is electrically connected to the target electrode tab, and the other end is electrically connected to the target connector to obtain the 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 open.

15. The battery assembly as claimed in claim 14, characterized in that, The protection circuit includes two detection resistors connected in parallel; the first sub-protection circuit includes: Two first switches are connected in parallel.

16. The battery assembly as claimed in claim 15, characterized in that, 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 electrode 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 one end of the detection resistor is electrically connected to the target electrode 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 the target connector.

17. The battery assembly as claimed in claim 16, characterized in that, The protection circuit also includes: A first voltage-regulating resistor, one end of which is electrically connected to a non-target electrode, and the other end of which is electrically connected to the fifth port; and A first filter capacitor, one end of which is electrically connected to the other end of the first voltage-regulating resistor, the other end of which is electrically connected to one end of the detection resistor, and the other end of which is also electrically connected to the fourth port.

18. The battery assembly as claimed in claim 17, characterized in that, The first filter capacitor includes two first sub-capacitors connected in series.

19. The battery assembly as claimed in claim 14, characterized in that, The protection circuit further includes a second sub-protection circuit, which includes: A second switch, wherein the second switch is connected in series between the target electrode tab and the target connector; and If the detected voltage is greater than or equal to the second threshold voltage, the second control chip controls the second switch to open, wherein the second threshold voltage is greater than the first threshold voltage.

20. The battery assembly as claimed in claim 19, characterized in that, The second sub-protection circuit includes: Two second switches are connected in parallel.

21. The battery assembly as claimed in claim 20, characterized in that, 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 electrode, the fourth pin is electrically connected to 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 as claimed in claim 21, characterized in that, The protection circuit also includes: A second voltage-regulating resistor, one end of which is electrically connected to the non-target electrode, and the other end of which is electrically connected to the fifth pin; and The second filter capacitor has one end electrically connected to the other end of the second voltage regulator resistor, the other end of the second filter capacitor electrically connected to one end of the detection resistor, and the other end of the second filter capacitor also electrically connected to the fourth pin.

23. The battery assembly as claimed in claim 22, characterized in that, The second filter capacitor includes two second sub-capacitors connected in series.

24. The battery assembly as claimed in claim 14, characterized in that, The protection circuit also includes: A power meter unit is used to calculate the amount of electricity the battery cell is charged.

25. The battery assembly as claimed in claim 1, characterized in that, 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 as claimed in claim 14, characterized in that, The protection circuit further includes a second sub-protection circuit, which is connected in series between the target electrode and the target connector. If the detected 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 includes a battery assembly as described in any one of claims 1-26.

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