Battery protection board and battery

Abstract

The utility model discloses a battery protection plate and a battery, and belongs to the technical field of batteries, the battery protection plate is characterized in that at least two first connecting pieces are arranged on a first surface of a substrate, the first connecting pieces are connected with the substrate, a reinforcing plate is arranged on one surface, deviating from the substrate, of each first connecting piece, and the reinforcing plate is connected with the substrate through the first connecting pieces; the current transmitted in the substrate can be transmitted to the reinforcing plate through any one of the at least two first connecting pieces, and the current transmitted to the reinforcing plate can be transmitted to the substrate through at least one of the other first connecting pieces, so that the current in the substrate can be conducted to the reinforcing plate through the first connecting pieces. The reinforcing plate can share the current in the substrate, so that a through-flow loop formed by the battery protection plate, the battery cell and the external electric device can load larger current, the through-flow capability of the battery protection plate is improved, and the use performance of an electronic product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery protection plate and a battery. Background Art

[0002] With the increasing demand for lighter and thinner electronic products and faster charging designs, it is necessary to reduce the size of battery protection boards in existing batteries. However, the reduction in the size of battery protection boards leads to a decrease in their current capacity, which affects the performance of electronic products. Utility Model Content

[0003] The utility model aims to provide a battery protection board and a battery, so as to solve the problem that the current flow capacity of the existing battery protection board is relatively weak.

[0004] A first aspect of an embodiment of the present application provides a battery protection plate, which has a first direction and a second direction intersecting each other, and comprises: a substrate, which comprises a first surface and a second surface arranged opposite to each other along the first direction, and the substrate is capable of transmitting current; at least two first connectors are arranged on the first surface, the first connectors are connected to the substrate, and at least two of the first connectors are arranged at intervals along the second direction; a reinforcement plate is arranged on a side of the first connector away from the substrate along the first direction, the reinforcement plate is connected to the substrate through the first connector, and the reinforcement plate is capable of transmitting current; among the at least two first connectors, the current transmitted by the substrate can be transmitted to the reinforcement plate through any one of the first connectors, and the current transmitted to the reinforcement plate can be transmitted to the substrate through at least one of the remaining first connectors.

[0005] Optionally, the battery protection board also includes electronic components and a connector; the substrate includes a first area and a second area arranged along the second direction; the electronic component is arranged on the second surface and in the first area, the connector is arranged in the second area, and the electronic component and the connector are electrically connected to the substrate respectively; the reinforcement plate and the substrate located in the first area are spaced apart along the first direction; the substrate can be electrically connected to the battery cell through the electronic component, and can be electrically connected to the electrical device through the connector, so as to form a first current circuit for current transmission between the substrate, the battery cell and the electrical device; a second current circuit connected in parallel with the first current circuit is formed between the reinforcement plate, the first connecting member and the substrate.

[0006] Optionally, the substrate includes at least two laminates; along the first direction, the at least two laminates are spaced apart, and adjacent laminates are insulated from each other. The substrate is provided with a through hole penetrating the substrate, and a conductive portion extending along the first direction is disposed in the through hole. Adjacent laminates are electrically connected through the conductive portion; at least one of the first connectors is connected to the conductive portion along the first direction to be connected to the substrate; and / or, at least one of the first connectors is spaced apart from the conductive portion along the second direction, and the first connector is connected to the substrate located outside the through hole.

[0007] Optionally, the battery protection board further includes a first insulating layer, and the first insulating layer is disposed on the first surface of the substrate; along the first direction, the first connector penetrates the first insulating layer, and the reinforcing plate is disposed on the surface of the first insulating layer facing away from the substrate.

[0008] Optionally, the battery protection board further includes a second insulating layer, and the second insulating layer is disposed on the surface of the reinforcing plate facing away from the substrate along the first direction.

[0009] Optionally, the battery protection board further includes a second connector, and the second connector is disposed on the second surface and connected to the substrate; the electronic component is disposed on the surface of the second connector facing away from the substrate along the first direction, and the electronic component is electrically connected to the substrate through the second connector.

[0010] Optionally, the battery protection board further includes a third insulating layer, and the third insulating layer is disposed on the second surface. The second connector penetrates the third insulating layer along the first direction and is connected to the substrate.

[0011] Optionally, the battery protection board further includes a fourth insulating layer; along the first direction, the fourth insulating layer is disposed between adjacent laminates to insulate the two laminates from each other through the fourth insulating layer.

[0012] Optionally, the first connector is a pad, and the second connector is a pad.

[0013] In a second aspect of the embodiments of the present application, a battery is provided. The battery includes the battery protection board as described above; a battery cell, the battery cell includes a main body portion and a tab connected to the main body portion, and the tab is connected to an electronic component on the battery protection board.

[0014] In summary, the embodiment of the present application provides a battery protection board and a battery having the protection board. The battery protection board is provided with at least two first connectors on the first surface of the substrate. The first connectors are connected to the substrate, and a reinforcing plate is provided on the surface of the first connectors facing away from the substrate. The reinforcing plate is connected to the substrate through the first connectors. The current transmitted in the substrate can be transmitted to the reinforcing plate through any one of the at least two first connectors, and the current transmitted to the reinforcing plate can be transmitted to the substrate through at least one of the remaining first connectors. Thus, after the battery protection board is connected to the battery cell and the external electrical device to form a current-carrying loop, the current in the current-carrying loop in the substrate of the battery protection board can be conducted to the reinforcing plate through the first connectors, and the reinforcing plate can share the current in the substrate, so that the current-carrying loop formed by the battery protection board, the battery cell and the external electrical device can carry a larger current, thereby improving the current-carrying capacity of the battery protection board and the performance of the electronic product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 is a schematic structural diagram of the battery protection board provided by the embodiment of the present application from the first angle;

[0017] Figure 2 is a schematic structural diagram of the battery protection board provided by the embodiment of the present application from the second angle;

[0018] Figure 3 is a first cross-sectional view of the substrate, the first connector and the reinforcing plate in the first area of the battery protection board provided by the embodiment of the present application;

[0019] Figure 4 is a second cross-sectional view of the substrate, the first connector and the reinforcing plate in the first area of the battery protection board provided by the embodiment of the present application;

[0020] Figure 5 is a schematic structural diagram of the battery cell in the battery provided by the embodiment of the present application.

[0021] MAIN REFERENCE NUMERALS DESCRIPTION:

[0022] 1. Battery protection board;

[0023] 10. Substrate, 101. First area, 102. Second area, 11. First surface, 12. Second surface, 13. Laminate, 14. Through hole, 141. Conductive part;

[0024] 20. First connecting member;

[0025] 30. Reinforcing plate;

[0026] 40. Electronic component, 41. First component, 42. Second component;

[0027] 50. Connector;

[0028] 61. First insulating layer, 62. Second insulating layer, 63. Third insulating layer, 64. Fourth insulating layer;

[0029] 70. Second connecting member;

[0030] 2. Battery cell, 21. Main body part, 22. Tab, 221. Positive tab, 22. Negative tab;

[0031] X. First direction, Y. Second direction, Z. Third direction. Detailed implementation manners

[0032] In order to make the objectives, technical solutions and beneficial effects of the present application clearer and more understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners. It should be understood that the specific implementation manners described in this specification are only for explaining the present application and not for limiting the present application.

[0033] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "a plurality" refers to two or more, unless otherwise specifically defined.

[0034] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0035] In the present application, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0036] In the embodiments of the application, "parallel" means the state where the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is -1° to 1°. Additionally, "perpendicular" means the state where the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°. Equal distance or equal angle means the state where the tolerance range is -1% to 1%.

[0037] An embodiment of the present application provides a battery protection board 1. Referring to Figures 1 to 4 , the battery protection board 1 includes: a substrate 10, a first connector 20, and a reinforcing plate 30. The battery protection board 1 has a first direction X, a second direction Y, and a third direction Z that intersect pairwise. Specifically, in the embodiment shown in Figures 1 to 4 , the first direction X, the second direction Y, and the third direction Z are pairwise orthogonal.

[0038] Referring to Figures 1 to 4 , the substrate 10 includes a first surface 11 and a second surface 12 that are oppositely arranged along the first direction X, and the substrate 10 is capable of conducting current. Among them, the first direction X corresponds to the thickness direction of the substrate 10, the second direction Y corresponds to the length direction of the substrate 10, and the third direction Z corresponds to the width direction of the substrate 10.

[0039] Referring to Figure 2 and Figure 3In the battery protection board 1 provided in the embodiment of the present application, the number of the first connectors 20 is at least two, the first connectors 20 are arranged on the first surface 11 of the substrate 10, the first connectors 20 are connected to the substrate 10, specifically, the first connectors 20 are conductively connected to the substrate 10, the current in the substrate 10 can be transmitted to the first connectors 20, and at least two first connectors 20 are arranged at intervals along the second direction Y. Specifically, Figure 3 and Figure 4 In the illustrated embodiment, the number of the first connecting members 20 is two. In other implementations, the number of the first connecting members 20 may be three or more, which is selected based on actual usage requirements.

[0040] Reference Figures 2 to 4 The reinforcing plate 30 is disposed on a side of the first connecting member 20 away from the substrate 10 along the first direction X. The reinforcing plate 30 is connected to the substrate 10 through the first connecting member 20, and the reinforcing plate 30 can transmit current.

[0041] Among the at least two first connectors 20 , the current transmitted by the substrate 10 can be transmitted to the reinforcing plate 30 through any one of the first connectors 20 , and the current transmitted to the reinforcing plate 30 can be transmitted to the substrate 10 through at least one of the remaining first connectors 20 .

[0042] With the increasing demand for lighter and thinner electronic products and faster charging designs, especially for 3C electronic products, in order to improve the space utilization inside the battery compartment where the battery is placed and leave more space for other components of the electronic product, it is necessary to reduce the size of the battery protection board in the battery. However, the reduction in the size of the battery protection board will lead to a decrease in its current capacity, which will affect the performance of the electronic product.

[0043] The battery protection board 1 provided by the embodiment of the present application is provided with at least two first connectors 20 on the first surface 11 of the substrate 10. The first connectors 20 are connected to the substrate 10 to transmit the current in the substrate 10. A reinforcing plate 30 is arranged on the surface of the first connector 20 facing away from the substrate 10 in the first direction X. The reinforcing plate 30 is connected to the substrate 10 through the first connector 20, and the reinforcing plate 30 can transmit current. Thus, the current transmitted by the substrate 10 can be transmitted to the reinforcing plate 30 through any one of the at least two first connectors 20, and the current transmitted to the reinforcing plate 30 can be transmitted to the substrate 10 through at least one of the remaining first connectors 20. While ensuring the current transmission of the substrate 10 and without increasing the overall thickness of the battery protection board 1, the reinforcing plate 30 can shunt and share the current transmitted in the substrate 10, thereby increasing the flow rate of the current that can flow in the battery protection board 1, improving the current-carrying capacity of the battery protection board 1, and further improving the use performance of the electronic product. Moreover, the arrangement of the reinforcing plate 30 can form a support for the substrate 10 in the first direction X, enhancing the overall strength of the battery protection board 1 along the first direction X, so that the battery protection board 1 is not easily deformed during production and use, extending the service life of the battery protection board 1, and ensuring the use stability of the electronic product.

[0044] In some embodiments, the number of the first connectors 20 in the battery protection board 1 is two. The current transmitted by the substrate 10 can be transmitted to the reinforcing plate 30 through one of the first connectors 20, and the current transmitted to the reinforcing plate 30 can be transmitted to the substrate 10 through the other first connector 20.

[0045] In some embodiments, the number of the first connectors 20 in the battery protection board 1 is three. The current transmitted by the substrate 10 can be transmitted to the reinforcing plate 30 through any one of the three first connectors 20. The current transmitted to the reinforcing plate 30 can be transmitted to the substrate 10 through one of the remaining two first connectors 20, and the current transmitted to the reinforcing plate 30 can also be transmitted to the substrate 10 through the remaining two first connectors 20 respectively.

[0046] In some embodiments, the first connector 20 is a pad. The first connector 20 is welded on the first surface 11 of the substrate 10, and the reinforcing plate 30 is welded to the first connector 20, thereby ensuring the connection stability between the reinforcing plate 30 and the substrate 10.

[0047] In some embodiments, the reinforcing plate 30 is a steel sheet, which can increase the overall strength of the battery protection board 1 in the first direction X while having the ability to transmit current.

[0048] In some embodiments, referring to Figure 1 and Figure 2, the battery protection board 1 further includes an electronic component 40 and a connector 50. The substrate 10 includes a first area 101 and a second area 102 arranged along the second direction Y. The electronic component 40 is disposed on the second surface 12 of the substrate 10 and in the first area 101. Therefore, the first area 101 can also be called the component layout area. The connector 50 is disposed in the second area 102. The electronic component 40 and the connector 50 are electrically connected to the substrate 10 respectively. Refer to Figure 2 , the reinforcing plate 30 is spaced apart from the substrate 10 located in the first area 101 along the first direction X. The substrate 10 can be electrically connected to the battery cell 2 through the electronic component 40 and can be electrically connected to the electrical device through the connector 50 to form a first current-carrying loop for current transmission among the substrate 10, the battery cell 2 and the electrical device. A second current-carrying loop is formed among the reinforcing plate 30, the first connecting member 20 and the substrate 10 and is connected in parallel with the first current-carrying loop.

[0049] The battery is arranged in the electronic product. The battery cell in the battery is connected to the electrical device in the electronic product through the battery protection board, so as to conduct the battery cell and the electrical device through the battery protection board, and a current-carrying loop is formed among the battery cell, the battery protection board and the electrical device to transmit current, so as to provide electrical energy for the electrical device. As an important part of the current-carrying loop, the reduction of the size of the battery protection board will reduce the current-carrying capacity of the entire current-carrying loop, that is, reduce the current transmission performance between the battery cell and the electrical device, and affect the use stability of the electronic product.

[0050] In the battery protection board 1 provided by the embodiment of the present application, by disposing the electronic component 40 in the first area 101 of the substrate 10 and disposing the connector 50 in the second area 102 of the substrate 10, the battery protection board 1 is electrically connected to the battery cell 2 through the electronic component 40 and is electrically connected to the electrical device through the connector 50, so as to form a first current-carrying loop for current transmission among the battery cell 2, the battery protection board 1 and the electrical device. Moreover, the reinforcing plate 30 is connected to the substrate 10 through the first connecting member 20, and a second current-carrying loop connected in parallel with the first current-carrying loop is formed among the reinforcing plate 30, the first connecting member 20 and the substrate 10. The formation of the second current-carrying loop can shunt and share the current transmitted in the first current-carrying loop, thereby increasing the flow rate of the current that can flow through the battery protection board 1. On the premise that the length of the battery protection board 1 along the second direction Y and the width along the third direction Z remain unchanged, the current-carrying capacity of the battery protection board 1 is increased, and further the current-carrying capacity of the battery protection board 1 is improved, and the use performance and use stability of the electronic product are improved.

[0051] In some embodiments, the hardness of the substrate 10 located in the first region 101 is less than that of the substrate 10 located in the second region 102. Specifically, the substrate 10 in the first region 101 is a flexible printed circuit (FPC), which is a flexible board, and the substrate 10 in the second region 102 is a printed circuit board (PCB), which is a rigid board. The reinforcing plate 30 is arranged along the first direction X with the flexible circuit board, which can enhance the strength of the flexible circuit board in the first direction X, and further enhance the overall strength of the battery protection plate 1.

[0052] In some embodiments, referring to Figure 3 and Figure 4 , the substrate 10 includes at least two laminates 13, and the at least two laminates 13 are arranged at intervals along the first direction X. The adjacent two laminates 13 are insulated from each other. The substrate 10 is provided with a through hole 14 that penetrates the substrate 10 along the first direction X, that is, the through hole 14 penetrates all the laminates 13 in the substrate 10 along the first direction X. A conductive portion 141 extending along the first direction X is arranged in the through hole 14, and the adjacent two laminates 13 along the first direction X are insulated from each other. Specifically, in the embodiments shown in Figure 3 and Figure 4 , the number of laminates 13 in the substrate 10 is two, and they are arranged at intervals along the first direction X. In other implementation manners, the number of laminates 13 can be three or more, which is specifically selected according to actual usage requirements. The number of through holes 14 is multiple, and the number of through holes 14 can be selected according to actual usage requirements.

[0053] In some embodiments, the laminate 13 is a copper foil.

[0054] In some embodiments, the conductive portion 141 is a metal, such as tin, which can conduct current.

[0055] In some embodiments, at least one first connector 20 is connected to the conductive portion 141 along the first direction X. Specifically, in the embodiment shown in Figure 3 , two first connectors 20 are respectively connected to the conductive portion 141 in the through hole 14 along the first direction X. The current transmitted in the substrate 10 can be transmitted to the first connector 20 through the conductive portion 141, and then transmitted to the reinforcing plate 30.

[0056] In some embodiments, at least one first connector 20 is arranged at intervals from the conductive portion 141 along the second direction Y. The first connector 20 is connected to the substrate 10 located outside the through hole 14. The current transmitted in the substrate 10 can be directly transmitted into the first connector 20, and then transmitted to the reinforcing plate 30. Specifically, in the embodiment shown in Figure 4 , among the two first connectors 20, one first connector 20 is arranged at intervals from the conductive portion 141 along the second direction Y, and the other first connector 20 is connected to the conductive portion 141 along the first direction X.

[0057] In some embodiments, referring to Figure 3 and Figure 4 , the battery protection board 1 further includes a first insulating layer 61. The first insulating layer 61 is disposed on the first surface 11 of the substrate 10. Along the first direction X, the first connecting member 20 penetrates through the first insulating layer 61. The reinforcing plate 30 is disposed on the surface of the first insulating layer 61 facing away from the substrate 10. Specifically, the reinforcing plate 30 is connected to one end of the first connecting member 20 exposed from the first insulating layer 61. The first insulating layer 61 can form an insulating interval between the reinforcing plate 30 and the substrate 10, so that the reinforcing plate 30 can only be connected to the substrate 10 through the first connecting member 20 to form a second current return, preventing the reinforcing plate 30 from directly contacting the substrate 10 and causing short circuit and overcurrent, and ensuring the use safety and stability of the battery protection board 1.

[0058] In some embodiments, referring to Figure 3 and Figure 4 , the battery protection board 1 further includes a second insulating layer 62. The second insulating layer 62 is disposed on the surface of the reinforcing plate 30 facing away from the substrate 10 along the first direction X. The second insulating layer 62 can form a covering for the reinforcing plate 30. Thus, when the battery protection board 1 and the battery cell 2 are assembled into a battery, the situation that the reinforcing plate 30 contacts the tab 22 of the battery cell 2 and causes a short circuit can be avoided, improving the use safety and stability of the battery protection board 1.

[0059] In some embodiments, referring to Figure 3 and Figure 4 , the battery protection board 1 further includes a second connecting member 70. The second connecting member 70 is disposed on the second surface 12 of the substrate 10 and connected to the substrate 10. The electronic component 40 is disposed on the surface of the second connecting member 70 facing away from the substrate 10 along the first direction X. The electronic component 40 is electrically connected to the substrate 10 through the second connecting member 70, so that the substrate 10 can connect the electronic component 40 to the battery cell 2, ensuring the stability of the electronic component 40 in the battery protection board 1.

[0060] In some embodiments, the second connecting member 70 is a pad. The second connecting member 70 is soldered on the second surface 12 of the substrate 10, and the electronic component 40 is soldered to the second connecting member 70, thus ensuring the connection stability between the electronic component 40 and the substrate 10 and the assembly stability of the electronic component 40 in the battery protection board 1.

[0061] In some embodiments, referring to Figure 3 and Figure 4, the battery protection board 1 further includes a third insulating layer 63. The third insulating layer 63 is disposed on the second surface 12 of the substrate 10. The second connecting member 70 penetrates through the third insulating layer 63 along the first direction X and is connected to the substrate 10. Specifically, the electronic component 40 is connected to one end of the second connecting member 70 exposed from the third insulating layer 63. The third insulating layer 63 can form an insulating interval between the electronic component 40 and the substrate 10, so that the electronic component 40 can only be connected to the substrate 10 through the second connecting member 70, preventing the electronic component 40 from directly contacting the substrate 10 and causing short circuit and overcurrent, and ensuring the use safety and stability of the battery protection board 1.

[0062] In some embodiments, the battery protection board 1 further includes a fourth insulating layer 64. Along the first direction X, the fourth insulating layer 64 is disposed between two adjacent laminates 13, so that the two laminates 13 are insulated through the fourth insulating layer 64, that is, only the conductive portion 141 in the through hole 14 forms an electrical connection between the two adjacent laminates 13, avoiding overcurrent caused by too large direct contact area between the laminates 13, and ensuring the use safety and stability of the battery protection board 1.

[0063] In some embodiments, the fourth insulating layer 64 is a polyimide film layer.

[0064] Some embodiments of the present application further provide a battery. Referring to Figures 1 to 5 , the battery includes a battery protection board 1 and an electric core 2.

[0065] Referring to Figure 5 , the electric core 2 includes a main body portion 21 and a tab 22 connected to the main body portion 21. The tab 22 includes a positive tab 221 and a negative tab 22 disposed at intervals. Referring to Figure 1 , the electronic components 40 on the battery protection board 1 include a first component 41 and a second component 42. The first component 41 is connected to the positive tab 221, and the second component 42 is connected to the negative tab 22, so as to form an assembly between the battery protection board 1 and the electric core 2.

[0066] Wherein, the battery is used to provide electrical energy to electronic products. The electronic products are 3C products, and 3C products refer to computer products, communication products, and consumer electronics products.

[0067] The above has introduced in detail the technical solutions provided by the embodiments of the present application. Specific examples are used herein to elaborate on the principles and implementation manners of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A battery protection board, the battery protection board having a first direction (X) and a second direction (Y) intersecting each other, characterized in that: The battery protection board comprises: A substrate (10), the substrate (10) comprising a first surface (11) and a second surface (12) arranged opposite to each other along the first direction (X), the substrate (10) being capable of transmitting current; At least two first connecting members (20) are arranged on the first surface (11), the first connecting members (20) are connected to the substrate (10), and at least two first connecting members (20) are arranged at intervals along the second direction (Y); a reinforcing plate (30) disposed on a side of the first connecting member (20) away from the substrate (10) along the first direction (X), the reinforcing plate (30) being connected to the substrate (10) via the first connecting member (20), and the reinforcing plate (30) being capable of transmitting current; Among at least two of the first connecting members (20), the current transmitted by the substrate (10) can be transmitted to the reinforcing plate (30) through any one of the first connecting members (20), and the current transmitted to the reinforcing plate (30) can be transmitted to the substrate (10) through at least one of the remaining first connecting members (20).

2. The battery protection board according to claim 1, characterized in that: The battery protection board also includes an electronic component (40) and a connector (50); The substrate (10) comprises a first area (101) and a second area (102) arranged along the second direction (Y); The electronic component (40) is arranged on the second surface (12) and in the first area (101), the connector (50) is arranged in the second area (102), and the electronic component (40) and the connector (50) are electrically connected to the substrate (10) respectively; The reinforcing plate (30) is spaced apart from the base plate (10) located in the first area (101) along the first direction (X); The substrate (10) can be electrically connected to the battery cell (2) through the electronic element (40), and can be electrically connected to the electrical device through the connector (50), so as to form a first current flow loop for current transmission between the substrate (10), the battery cell (2) and the electrical device; A second through-flow circuit connected in parallel with the first through-flow circuit is formed between the reinforcing plate (30), the first connecting member (20) and the base plate (10).

3. The battery protection board according to claim 1, characterized in that: The substrate (10) comprises at least two layer plates (13); At least two of the layer plates (13) are arranged at intervals along the first direction (X), and two adjacent layer plates (13) are insulated from each other; a through hole (14) penetrating the substrate (10) is provided on the substrate (10); a conductive portion (141) extending along the first direction (X) is provided in the through hole (14); and the two adjacent layer plates (13) are electrically connected via the conductive portion (141); At least one of the first connecting members (20) is connected to the conductive portion (141) along the first direction (X) so as to be connected to the substrate (10); And / or, at least one of the first connecting members (20) and the conductive portion (141) is arranged at intervals along the second direction (Y), and the first connecting member (20) is connected to the substrate (10) located outside the through hole (14).

4. The battery protection board according to claim 1, characterized in that: The battery protection plate further comprises a first insulating layer (61), wherein the first insulating layer (61) is arranged on the first surface (11) of the substrate (10); Along the first direction (X), the first connecting member (20) penetrates the first insulating layer (61), and the reinforcing plate (30) is arranged on a side of the first insulating layer (61) facing away from the substrate (10).

5. The battery protection board according to claim 1, characterized in that: The battery protection plate further comprises a second insulating layer (62), wherein the second insulating layer (62) is arranged on a side of the reinforcing plate (30) away from the substrate (10) along the first direction (X).

6. The battery protection board according to claim 2, characterized in that: The battery protection board also includes a second connecting member (70), wherein the second connecting member (70) is arranged on the second surface (12) and connected to the substrate (10); The electronic component (40) is arranged on a side of the second connecting member (70) away from the substrate (10) along the first direction (X), and the electronic component (40) is electrically connected to the substrate (10) via the second connecting member (70).

7. The battery protection board according to claim 6, characterized in that: The battery protection plate further comprises a third insulating layer (63), wherein the third insulating layer (63) is arranged on the second surface (12), and the second connecting member (70) penetrates the third insulating layer (63) along the first direction (X) and is connected to the substrate (10).

8. The battery protection board according to claim 3, characterized in that: The battery protection plate also includes a fourth insulating layer (64); Along the first direction (X), the fourth insulating layer (64) is arranged between two adjacent layer boards (13), so that the two layer boards (13) are insulated by the fourth insulating layer (64).

9. The battery protection board according to claim 6, characterized in that: The first connecting member (20) is a soldering pad, and the second connecting member (70) is a soldering pad.

10. A battery, characterized in that: The battery comprises: The battery protection board according to any one of claims 1 to 9; A battery cell (2), the battery cell (2) comprising a main body (21) and a tab (22) connected to the main body (21), the tab (22) being connected to an electronic component (40) on the battery protection board.

Images