CN220341447U - Slave plate structure, battery module and battery pack - Google Patents

Abstract

The utility model relates to the field of battery technology and discloses a slave plate structure, a battery module and a battery pack. The slave plate structure provided by the utility model includes a slave plate body, a first collection piece, an extension adapter strip and a second collection piece; The board body is suitable for being connected to the first end of the battery core group. The battery core group includes a plurality of battery core units arranged sequentially along the first direction; one end of the first collection piece is connected to the slave board body, and the other end is connected to the slave board. The battery cells corresponding to the body are electrically connected; one end of the extended adapter strip is connected to the slave board body, the other end extends to the outside of the slave board body, and extends along the first direction to the side of the first end; the second collection piece One end is connected to the extension adapter strip, and the other end is electrically connected to the battery cell unit corresponding to the extension adapter strip. Achieve matching between the slave board body with unified specifications and battery core groups with different numbers of battery cells, and improve the versatility of the slave board structure.

Description

From board structure, battery module and battery pack

Technical field

The utility model relates to the field of battery technology, specifically to sub-plate structures, battery modules and battery packs.

Background technique

At present, the development of power batteries is gradually moving towards simplification of structural parts and reduction of electrical components. The requirements for the volume grouping efficiency and installed power of the whole package are getting higher and higher, and the space reserved for the arrangement of electrical components such as wiring harnesses in the battery pack is becoming increasingly high. The less. Blade cells are increasingly used in power batteries related to related technologies. In blade modules, BMS battery management systems are usually used to intelligently manage and maintain each cell unit. The battery management system usually includes a main control board and a slave board. The slave board is responsible for collecting cell unit voltage and temperature, and the main control board is responsible for processing the signals collected from the slave board.

In battery packs in the related art, the length of the slave plate usually matches the length of the battery pack to facilitate connection with each battery unit to achieve the purpose of collecting the voltage and temperature of each battery unit; and within the same battery pack The number of battery cells in the battery pack will change according to actual needs, resulting in the same battery pack needing to match slave boards of different sizes. The specifications of the slave boards cannot be unified and have poor versatility.

Utility model content

In view of this, the present invention provides a slave plate structure, a battery module and a battery pack to solve the problem that the specifications of the slave plates of the battery module cannot be unified and the versatility is poor.

In a first aspect, the utility model provides a slave plate structure, which includes a slave plate body, a first collecting piece, an extension adapter strip and a second collecting piece; the slave plate body is suitable for being connected to the first end of the battery pack. , the battery core group includes a plurality of battery core units arranged sequentially along the first direction; one end of the first collection piece is connected to the slave board body, and the other end is connected to the battery core unit corresponding to the slave board body. Electrical connection; one end of the extended adapter strip is connected to the slave board body, the other end extends to the outside of the slave board body, and extends to the side of the first end along the first direction; second One end of the collection piece is connected to the extended adapter strip, and the other end is electrically connected to the battery cell unit corresponding to the extended adapter strip.

Beneficial effects: The first acquisition piece can collect the voltage and/or temperature information of the corresponding battery unit in the first direction of the board body, and transmit the collected information to the slave board body; the second acquisition piece can extend the The adapter strip collects information such as voltage and/or temperature of the battery unit corresponding to the first direction, and transmits the collected information to the slave board body; the slave board body can process the collected information and pass it to The main control board of the battery management system manages each battery cell unit through the main control board. The slave plate structure provided by the utility model can not only reduce the size of the slave plate body by extending the adapter strip, but also realize the miniaturization design of the slave plate structure and occupy less space; it can also be used in the battery cell units of the battery pack. When the quantity changes, the battery cell group can be matched by simply adjusting the length of the extended adapter strip, thereby achieving matching between the slave board body of a unified specification and the battery cell group with different numbers of battery cells, improving the efficiency of the slave board. Versatility of plate construction.

In an optional embodiment, the slave plate body is adapted to be disposed at an intermediate position of the first end, and both ends of the slave plate body in the first direction are connected to the extension Transfer strip.

Beneficial effects: The slave board body is set in the middle, and the extension adapter strips at both ends can be set shorter to shorten the collection path; extension adapter strips of uniform specifications can also be made at both ends of the slave board body, reducing the need for extended transfer strips. The production cost and difficulty of production of strips.

In an optional implementation, the projection of the first collection piece on the corresponding battery cell unit is located at an intermediate position in the first direction of the battery cell unit.

Beneficial effects: When the gap between the battery cells of the battery pack is fine-tuned, the first collection piece can also be overlapped and welded with the corresponding battery unit.

In an optional embodiment, the first collection piece has multiple pieces, and the plurality of first collection pieces are arranged in one-to-one correspondence with the plurality of battery core units corresponding to the slave board body.

In an optional implementation, each of the extended adapter strips is provided with one or more second collection pieces, and the plurality of second collection pieces correspond to the extended adapter strips. A plurality of battery cell units are arranged in one-to-one correspondence.

In an optional implementation, the extended adapter strip is an FPC adapter strip or an FFC adapter strip.

In an optional implementation, the first collection piece is a nickel piece.

In an optional implementation, the second collection piece is a nickel piece.

In an optional implementation, the slave board structure also includes two sets of communication connectors, respectively provided at both ends of the slave board body, one set of communication connectors is suitable for communication connection with the main control board, and the other is One set of communication connectors is adapted to communicate with other sets of slave board structures.

In a second aspect, the present invention also provides a battery module, including a plurality of battery cell groups and a battery management system. The battery cell group includes a plurality of battery cell units arranged sequentially along a first direction; a plurality of the battery cells The first cover at one end of the length direction of the unit forms the first end of the battery pack, and the second cover at the other end forms the second end of the battery pack; the battery management system includes a main control board and There are multiple sets of the above-mentioned slave board structures. Each group of the battery core groups is matched with one set of the slave board structures. Multiple sets of the slave board structures are connected in series. The main control board is connected with the multiple sets of the slave board structures in series. Communication connection, the slave board structure is provided at the first end.

Beneficial effects: The battery management system can monitor and manage each cell unit of the battery pack. By extending the adapter strips in the slave plate structure, the slave plate body can be reduced to achieve a miniaturized design of the slave plate structure, occupying less space; it can also be used only when the number of battery cells in the battery pack changes. By adjusting the length of the extended adapter strip, it can be matched with the battery pack, achieving matching between the slave board body of a unified specification and battery packs with different numbers of battery units, and improving the versatility of the slave board structure.

In an optional embodiment, the battery core unit further includes an explosion-proof valve, the explosion-proof valve is provided on a side of the battery core unit, the side parts of multiple battery core units are located on the same plane, and Disposed between the first cover plate and the second cover plate.

Beneficial effects: The explosion-proof valve is arranged on the side of the battery unit, and the battery unit only needs to be provided with a slave plate structure at the end of the first direction, that is, the first cover plate. In the related art, in order to avoid the explosion-proof valve and ensure the exhaust of the explosion-proof valve, the slave plate structure is usually erected on the upper part of the connecting aluminum bar of the battery unit, which results in the elevation of the slave plate structure and the extension of the battery unit in the length direction. In contrast, the slave plate structure and the explosion-proof valve provided by the present utility model are set at different positions, without the need to avoid the explosion-proof valve, so that the length of the battery pack in the length direction of the battery unit is reduced, reducing the battery life. The space occupied by the module in the battery pack.

In an optional embodiment, the positive and negative electrodes of the plurality of battery cells in the battery pack are alternately arranged; the battery module further includes a plurality of first connectors and a plurality of second connectors. and equipotential strips; a plurality of first connectors provided at the first end and located on one side of the slave plate body along a second direction, the first direction being perpendicular to the second direction; and more A second connector is provided at the second end and is located on one side of the projection of the slave plate body on the second end along the second direction, and a plurality of battery core units The poles are connected in series through a plurality of the first connectors and a plurality of the second connectors; the equipotential strip is arranged at the second end, one end is connected to the second connector, and the other end is connected along the The second direction extends to the other side of the projection of the slave board body on the second end and is connected to the housing of the battery cell unit; the first collection piece has an edge along the second The two groups distributed in the direction are respectively connected to the corresponding first connecting member and the corresponding housing of the battery unit, and the housing of the corresponding battery unit is arranged correspondingly with the other end of the corresponding equipotential strip; and /Or, the extended adapter strip has two groups distributed along the second direction, and the second collection pieces on the two groups of extended adapter strips are respectively connected to the corresponding first connector and the corresponding The shells of the battery cell units are connected, and the shells of the corresponding battery core units are arranged correspondingly with the other ends of the corresponding equipotential strips.

Beneficial effects: The arrangement of the first connecting member and the second connecting member connects multiple battery cell units in series to form a battery cell group. The equipotential strip conducts the voltage on one side in the second direction to the other side. The first collection pieces are arranged crosswise on both sides in the second direction of the slave board body according to the pattern of cross arrangement of battery cells; the second collection pieces are also arranged crosswise by extending the adapter strip.

In an optional embodiment, the slave plate structure further includes a first connecting plate and/or a second connecting plate; the first connecting plate is connected to the first end, and the slave plate body and the The first connecting parts are all connected to the side of the first connecting plate facing away from the first end; the second connecting plate is connected to the second end, and the second connecting parts and the equipotential The strips are connected to the side of the second connecting plate facing away from the second end.

In a third aspect, the present invention also provides a battery pack, including the above-mentioned battery module.

Description of the drawings

In order to more clearly explain the specific embodiments of the present invention or the technical solutions in the prior art, the drawings that need to be used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description The accompanying drawings illustrate some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of a slave plate structure according to an embodiment of the present invention;

Figure 2 is a partial schematic diagram of a slave plate structure according to an embodiment of the present invention;

Figure 3 is a schematic diagram of a battery module according to an embodiment of the present invention;

Figure 4 is a schematic diagram of a battery module (hidden battery pack) according to an embodiment of the present invention;

Figure 5 is a partial schematic diagram of a battery module (hidden battery pack) from a first perspective according to an embodiment of the present invention;

FIG. 6 is a partial schematic diagram of a battery module (hidden battery pack) from a second perspective according to an embodiment of the present invention.

Explanation of reference symbols:

1. Slave board structure; 101. Slave board body; 102. First collection piece; 103. Extended adapter strip; 104. Second collection piece; 105. Communication connector; 106. First connection plate; 2. Battery core Unit; 3. First connecting piece; 4. Second connecting piece; 5. Equipotential strip.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the description The embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present utility model.

The following describes embodiments of the present utility model with reference to FIGS. 1 to 4 .

According to an embodiment of the present invention, on the one hand, a slave plate structure 1 is provided, including a slave plate body 101, a first collection piece 102, an extension adapter strip 103 and a second collection piece 104; the slave plate body 101 is suitable for Connected to the first end of the battery pack, the battery pack includes a plurality of battery units 2 arranged sequentially along the first direction; one end of the first collection piece 102 is connected to the slave board body 101, and the other end is connected to the slave board body 101. 101 is electrically connected to the corresponding battery unit 2; one end of the extended adapter bar 103 is connected to the slave board body 101, and the other end extends to the outside of the slave board body 101, and extends along the first direction to the side of the first end; One end of the second collection piece 104 is connected to the extension adapter bar 103 , and the other end is electrically connected to the battery cell unit 2 corresponding to the extension adapter bar 103 .

Beneficial effects: the first collection piece 102 can collect information such as voltage and/or temperature of the corresponding battery cell unit 2 in the first direction of the board body, and transmit the collected information to the slave board body 101; the second collection piece 104 can collect the voltage and/or temperature information of the battery unit 2 corresponding to the extended adapter strip 103 in the first direction, and transmit the collected information to the slave board body 101; the slave board body 101 can collect the collected information. The received information is processed and transmitted to the main control board of the battery management system, and each battery unit 2 is managed through the main control board. The slave plate structure 1 provided by the present utility model can not only reduce the size of the slave plate body 101 by extending the adapter strip 103, but also realize the miniaturization design of the slave plate structure 1 and occupy less space; it can also be used in the battery pack. When the number of battery cells 2 changes, it can be matched with the battery pack only by adjusting the length of the extension adapter bar 103 , thereby achieving a uniform specification of the slave board body 101 and batteries with different numbers of battery units 2 Matching between groups improves versatility from plate structure 1.

In an optional embodiment, the slave board body 101 is adapted to be disposed at an intermediate position of the first end, and both ends of the slave board body 101 in the first direction are connected with extended adapter strips 103 .

Beneficial effects: The slave board body 101 is arranged in the middle, and the extension adapter bars 103 at both ends can be set shorter to shorten the collection path; and extended adapter bars 103 of uniform specifications can be made at both ends of the slave board body 101. The production cost and production difficulty of the extended adapter strip 103 are reduced.

As an alternative embodiment, the slave board body 101 may also be disposed at one end of the first end in the first direction, and the extended adapter strip 103 may be disposed at the other end of the slave board body 101 .

In one embodiment, as shown in FIG. 3 , the projection of the first collection piece 102 on the corresponding battery unit 2 is located at the middle position of the first direction of the battery unit 2 .

Beneficial effect: When the gap between the battery cells 2 of the battery pack is fine-tuned, the first collection piece 102 can also be overlapped and welded with the corresponding battery unit 2 .

In an optional implementation, the first collection piece 102 has multiple pieces, and the plurality of first collection pieces 102 are arranged in one-to-one correspondence with the plurality of electric core units 2 corresponding to the slave board body 101 . The number of first collection pieces 102 is consistent with the number of battery cell units 2 covered by the slave board body 101 in the first direction, and each battery unit 2 is provided with a piece of first collection sheet at a position corresponding to the slave board body 101 Film 102.

In an optional implementation, each extended adapter strip 103 is provided with one or more second collection pieces 104 , and the plurality of second collection pieces 104 correspond to multiple battery cells of the extended adapter strip 103 . Unit 2 is set in one-to-one correspondence. The number of second collection pieces 104 on each extended adapter bar 103 is consistent with the number of battery cell units 2 covered by the extended adapter bar 103 in the first direction, and each battery cell unit 2 corresponds to the extended adapter bar 103 A second collection piece 104 is provided at each position.

In one embodiment, the extended adapter strip 103 is an FPC adapter strip or an FFC adapter strip. FPC adapter strip is a strip-shaped flexible circuit board made of polyimide or polyester film as the base material. It is a highly reliable and excellent flexible printed circuit board. The FFC adapter strip is a strip-shaped tin-plated flat copper wire. It is a new type of data cable made of PET insulation material and extremely thin tin-plated flat copper wire and pressed through a high-tech automated equipment production line. It has a soft , can be bent and folded at will, thin in thickness, small in size, simple to connect, easy to disassemble, and easy to solve electromagnetic shielding (EMI).

In one embodiment, the first collection piece 102 is a nickel piece.

In one embodiment, the second collection piece 104 is a nickel piece.

In one embodiment, the slave board structure 1 also includes two sets of communication connectors 105, which are respectively provided at both ends of the slave board body 101. One set of communication connectors 105 is suitable for communication connection with the main control board, and the other set of communication connectors 105 is suitable for communication connection with the main control board. The controller 105 is adapted to communicate with other groups of slave board structures. There are two communication connectors 105 , respectively arranged at both ends of the slave board body 101 along the first direction; both sides of each communication connector 105 in the second direction can be connected to the extension adapter strip 103 . The number of slave board structures 1 is consistent with the number of battery core groups. When there are multiple battery core groups, the communication connector 105 at one end of a slave board structure 1 is communicatively connected to the main control board, and the communication connector 105 at the other end of the slave board structure 1 is connected to the other end. One slave board structure 1 is connected to the communication connector 105, and multiple groups of slave board structures are connected in series through the communication connector 105.

According to an embodiment of the present invention, on the other hand, as shown in Figures 3 to 6, a battery module is also provided, including multiple groups of battery cells and a battery management system. Each group of battery cells includes a A plurality of battery cell units 2 are arranged sequentially in one direction; the first cover plate at one end of the length direction of the plurality of battery cell units 2 forms the first end of the battery cell group, and the second cover plate at the other end forms the first end of the battery cell group. The second end; the battery management system includes a main control board and multiple sets of the above-mentioned slave board structures 1. Each group of battery cells is matched with a set of slave board structures. Multiple sets of slave board structures are connected in series in sequence. The main control board and multiple sets of slave board structures are connected in series. The group is communicatively connected with the slave plate structure 1, which is arranged at the first end.

The battery management system can monitor and manage each battery unit 2 of the battery pack. By extending the adapter strip 103, the slave plate structure 1 can reduce the size of the slave plate body 101, thereby realizing a miniaturized design of the slave plate structure 1 and occupying less space; it can also reduce the number of battery cells 2 in the battery pack. When a change occurs, it is possible to match the battery core group only by adjusting the length of the extension adapter bar 103, thereby achieving matching between the slave board body 101 of a unified specification and battery core groups with different numbers of battery cell units 2. Improve the versatility of slave plate structure 1.

Specifically, multiple sets of slave board structures 1 are sequentially connected in series through the communication connector 105, and the main control board can communicate with one group of the series-connected multiple sets of slave board structures 1. Two communication connectors 105 are provided at both ends of each slave board structure 1. One communication connector 105 of the slave board structure 1 at the head end is connected to the main control board, and the other communication connector 105 of the slave board structure 1 at the head end is connected to the main control board. The device 105 is communicatively connected to a communication connector 105 of another adjacent slave board structure, another communication connector 105 of another slave board structure is communicatively connected to the communication connector 105 of other slave board structure 1, and so on, The serial connection of multiple groups of slave board structures 1 is realized through the communication connector 5 .

In an optional embodiment, the battery core unit 2 also includes an explosion-proof valve. The explosion-proof valve is provided on the side of the battery core unit 2. The sides of the multiple battery core units 2 are located on the same plane and are provided on the first cover. between the plate and the second cover plate.

The explosion-proof valve is arranged on the side of the battery unit 2. The battery unit 2 only needs to be provided with the slave plate structure 1 at the end of the first direction, that is, the first cover plate. In the related art, in order to avoid the explosion-proof valve and ensure the exhaust of the explosion-proof valve, the slave plate structure 1 is usually erected on the upper part of the connecting aluminum bar of the battery unit 2, which results in the elevation of the slave plate structure and the extension of the battery unit. 2 in the length direction. In contrast, in this embodiment, the slave plate structure 1 and the explosion-proof valve are set at different positions, and there is no need to avoid the explosion-proof valve, so that the battery pack is in the length direction of the battery unit 2 The reduced length reduces the space occupied by the battery module in the battery pack.

In an optional embodiment, the positive and negative electrodes of the plurality of battery units 2 of the battery pack are alternately arranged; the battery module also includes a plurality of first connectors 3, a plurality of second connectors 4 and equal potentials. Strip 5; a plurality of first connectors 3, arranged at the first end and located on one side of the slave board body 101 along the second direction, the first direction being perpendicular to the second direction; a plurality of second connectors 4, arranged At the second end, and located on one side of the projection from the board body 101 on the second end along the second direction, poles of the plurality of battery cells 2 pass through a plurality of first connectors 3 and a plurality of second connectors. The connectors 4 are connected in series in sequence; the equipotential strip 5 is provided at the second end, one end is connected to the second connector 4, and the other end extends along the second direction to the other side of the projection from the plate body 101 on the second end. side, and connected with the shell of the battery unit 2.

There are two sets of first collection pieces 102, which are respectively connected to both sides of the slave board body 101 along the second direction; one set of first collection pieces 102 is connected to the corresponding first connector 3, and the other set of first collection pieces 102 is connected to the corresponding first connector 3. The casings of corresponding battery cell units 2 are connected and arranged correspondingly to the other end of the equipotential bar 5 .

The extension adapter strip 103 has two groups, which are respectively connected to both sides of the slave board body 101 along the second direction. The second collection piece 104 on one set of extension adapter strips 103 is connected to the corresponding first connector 3, and the second collection piece 104 on the extension adapter strip 103 is connected to the corresponding first connector 3. The second collection piece 104 on the group extension adapter bar 103 is connected to the housing of the corresponding battery cell unit 2 and is disposed corresponding to the other end of the equipotential bar 5 .

The arrangement of the first connecting member 3 and the second connecting member 4 connects a plurality of battery cell units 2 in series to form a battery cell group. The equipotential bar 5 can conduct the voltage on one side in the second direction to the other side. The first collection pieces 102 are arranged crosswise on both sides in the second direction from the board body 101 according to the pattern of cross arrangement of the battery cells 2; the second collection pieces 104 are also arranged crosswise by extending the adapter strip 103.

Specifically, both the first connecting member 3 and the second connecting member 4 may be aluminum bar, or may be a copper-aluminum composite conductive connecting member. The equipotential strip 5 is also made of copper sheets or other conductive metal sheets. The first collecting piece 102 can be overlap-welded with the first connecting member 3 , overlap-welded with the slave board body 101 , and can also be overlap-welded with the casing of the battery cell unit 2 . The second collecting piece 104 can be overlap welded with the first connecting member 3 , the extended adapter bar 103 , and the shell of the battery unit 2 can also be overlap welded.

In an optional embodiment, the slave plate structure 1 further includes a first connecting plate 106 and/or a second connecting plate; the first connecting plate 106 is connected to the first end, and the slave plate body 101 and the first connecting piece 3 are both connected to the side of the first connecting plate 106 facing away from the first end; the second connecting plate is connected to the second end, and the second connecting piece 4 and the equipotential bar 5 are connected to The side of the second connecting plate facing away from the second end.

The first connecting plate 106 can be fixedly connected to the first end from the plate body 101 and the first connecting piece 3. The first connecting plate 106 is provided with a limiting hole, and the limiting hole is used to limit the position of the pole of the battery unit 2. fixed. The first connecting plate 106 may also be provided with slots, and the slave plate body 101 and the first connecting member 3 are respectively clamped in different slots; or, the slave plate body 101 and the first connecting plate 106 are bonded and fixed. The first connecting plate 106 may be a plastic plate. The second connecting plate can fixedly connect the second connecting piece 4 and the equipotential strip 5 at the second end. The second connecting plate is provided with a limiting hole, and is fixed with the pole of the battery unit 2 through the limiting hole. The second connecting plate may also be provided with a slot, and the second connecting member 4 may be clamped in the slot; or, the second connecting member 4 and the second connecting plate may be bonded and fixed. The second connecting plate can be a plastic plate.

In a third aspect, the present invention also provides a battery pack, including the above-mentioned battery module. The battery pack can be equipped with one set of battery modules or multiple sets of battery modules. The multiple sets of battery modules can be equipped with a main control board. The slave board structure 1 of each set of battery modules is electrically connected to the main control board. connect.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations fall within the scope of the invention. within the scope defined by the appended claims.

Claims (10)

1. A slave plate structure, comprising:

the secondary plate body is suitable for being connected to a first end part of a battery cell group, and the battery cell group comprises a plurality of battery cell units which are sequentially arranged along a first direction;

one end of the first acquisition sheet is connected to the slave plate body, and the other end of the first acquisition sheet is electrically connected with the battery cell unit corresponding to the slave plate body;

an extension transfer bar, one end of which is connected with the slave plate body, and the other end of which extends to the outside of the slave plate body and extends to the side part of the first end part along the first direction;

and one end of the second acquisition sheet is connected to the extension switching strip, and the other end of the second acquisition sheet is electrically connected with the battery cell unit corresponding to the extension switching strip.

2. A slave plate structure according to claim 1, wherein the slave plate body is adapted to be disposed in a position intermediate the first end portion, the slave plate body being connected at both ends in the first direction with the elongate transition strip.

3. The slave plate structure of claim 2, wherein a projection of the first acquisition pad onto the corresponding cell is located at an intermediate position in the first direction of the cell.

4. The slave plate structure according to claim 1, wherein the first collecting piece has a plurality of pieces, and the plurality of pieces of the first collecting piece are arranged in one-to-one correspondence with the plurality of the battery cells corresponding to the slave plate body;

and/or, each extension transfer strip is provided with one or more second acquisition sheets, and the second acquisition sheets are arranged in one-to-one correspondence with the plurality of battery cell units corresponding to the extension transfer strips.

5. The slave plate structure according to any one of claims 1 to 4, wherein the extended transfer bar is an FPC transfer bar or an FFC transfer bar;

and/or, the first acquisition sheet is a nickel sheet;

and/or, the second acquisition sheet is a nickel sheet;

and/or, the slave plate structure further comprises two groups of communication connectors which are respectively arranged at two ends of the slave plate body, one group of communication connectors are suitable for being in communication connection with the master control plate, and the other group of communication connectors are suitable for being in communication connection with other groups of slave plate structures.

6. A battery module, comprising:

the battery cell group comprises a plurality of battery cell units which are sequentially arranged along a first direction; a first cover plate at one end of the plurality of battery cell units in the length direction forms a first end part of the battery cell group, and a second cover plate at the other end forms a second end part of the battery cell group;

the battery management system comprises a main control board and a plurality of groups of slave board structures according to any one of claims 1 to 5, wherein each group of battery cell groups are matched with one group of slave board structures, the plurality of groups of slave board structures are sequentially connected in series, the main control board is in communication connection with the plurality of groups of slave board structures which are connected in series, and the slave board structures are arranged at the first end part.

7. The battery module of claim 6, wherein the cell unit further comprises an explosion-proof valve disposed at a side of the cell unit, the sides of the plurality of cell units being located at the same plane and disposed between the first cover plate and the second cover plate.

8. The battery module according to claim 6, wherein positive and negative electrodes of a plurality of the battery cells of the battery cell group are alternately arranged; the battery module further includes:

a plurality of first connection members disposed at the first end portion and located at one side of the slave plate body in a second direction, the first direction being perpendicular to the second direction;

the plurality of second connecting pieces are arranged at the second end part and positioned at one side of the projection of the slave plate body on the second end part along the second direction, and the poles of the plurality of battery cell units are sequentially connected in series through the plurality of first connecting pieces and the plurality of second connecting pieces;

the equipotential strip is arranged at the second end part, one end of the equipotential strip is connected with the second connecting piece, and the other end of the equipotential strip extends to the other side of the projection of the slave plate body on the second end part along the second direction and is connected with the shell of the battery cell unit;

the first acquisition sheet is provided with two groups distributed along the second direction and is respectively connected with the corresponding first connecting piece and the corresponding shell of the battery cell unit; and/or, the extension transfer strip is provided with two groups distributed along the second direction, and the second collecting pieces on the two groups of extension transfer strips are respectively connected with the corresponding first connecting pieces and the corresponding shells of the battery cell units.

9. The battery module of claim 8, wherein the slave plate structure further comprises:

the slave plate body and the first connecting piece are connected to one side, facing away from the first end, of the first connecting plate;

and/or a second connecting plate is connected to the second end part, and the second connecting piece and the equipotential strip are both connected to one side, facing away from the second end part, of the second connecting plate.

10. A battery pack comprising the battery module according to any one of claims 6 to 9.