Battery cell signal acquisition assembly of battery pack and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery cell signal acquisition assembly of a battery pack and the battery pack, and the acquisition assembly comprises a circuit board, a connecting piece and a busbar which are arranged in a mutually stacked manner, wherein the circuit board comprises a main body and a connecting part which is formed by extending outwards from one part of the main body, and the connecting part is electrically connected with the busbar through a connecting piece; the connecting piece is provided with a connecting structure, and the connecting part is detachably connected with the connecting structure. According to the utility model, the connecting structure is arranged on the connecting piece, the connecting part of the circuit board can be detachably connected with the connecting piece through the connecting structure, and compared with the original welding connection mode, the circuit board can be repeatedly disassembled and assembled without destructive disassembly, so that the possibility that materials are scrapped when the battery cell of the battery pack is replaced is reduced; in addition, the circuit board is an integral component, so that the number of the components can be effectively reduced, and operation steps during assembly of the circuit board can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to the electric core signal collection subassembly and battery package of battery package. BACKGROUND

[0002] With the continuous development of power battery technology, the blade electric core has been widely applied because its structure size is relatively compatible with the structure form of the battery package. The blade electric core is a kind of electric core form with flat design and pole located at both ends of itself. The collection subassembly is a working subassembly in the battery package mainly used for monitoring and protecting the battery system. The collection subassembly can collect various data of the electric core and send these information to the battery management system for real-time monitoring and management.

[0003] At present, the existing collection subassembly is usually composed of busbars, collection circuit boards and collection sheets. The busbars are used for electrical connection between the electric cores. The collection sheets are arranged on the collection circuit boards and welded and fixed with the busbars. Although this welding and fixing mode is relatively reliable, it is necessary to destructively disassemble the collection subassembly in order to remove it during the later maintenance process. In addition, it is difficult to perform the welding step during the subsequent installation process. Therefore, the existing connection mode of the electric core and the collection subassembly has the problem of difficult maintenance. SUMMARY

[0004] Therefore, the utility model provides a kind of electric core signal collection subassembly and battery package of battery package to solve the problem of difficult maintenance of the existing connection mode of electric core and collection subassembly.

[0005] In the first aspect, the utility model provides a kind of electric core signal collection subassembly of battery package, comprising: circuit board, connecting piece, busbar mutually laminated arrangement;Wherein, circuit board includes main body, and the connecting portion formed by the outward extension from the part of main body, connecting portion is electrically connected with busbar by connecting piece;Connecting piece has connecting structure, connecting structure has the shape that is bent and extends from the side of connecting piece and is suitable for clamping at least part of connecting portion, so that connecting portion and connecting structure form detachable connection.

[0006] Beneficial effect: setting connecting structure on connecting piece, the connecting portion of circuit board can be detachably connected with connecting piece through connecting structure, compared with the original welding connection mode, circuit board can be repeatedly disassembled and installed without destructive disassembly, reduce the possibility of material scrapping when battery package replaces electric core, more convenient for operator to maintain and repair electric core, in addition, circuit board is an integral component, which can effectively reduce the number of components and the operation steps during assembly, effectively solve the problem of difficult maintenance of the existing connection mode of electric core and collection subassembly.

[0007] In an alternative embodiment, a reinforcing member is further included, the circuit board is a flexible circuit board, and the reinforcing member has a supporting surface for supporting the connecting portion, and the connecting portion is in abutting engagement with the connecting member through the reinforcing member.

[0008] Beneficial effects: the reinforcing member not only supports the connecting portion, improves the structural strength of the connecting portion and the durability during repeated disassembly, and prevents the connecting portion from deforming, but also enables the connecting portion and the connecting member to be more closely attached, thereby improving the connection reliability of the two.

[0009] In an alternative embodiment, the connecting portion includes a fitting section and a bending section, the fitting section is connected to the main body through the bending section, the fitting section forms a detachable connection with the connecting structure, and the reinforcing member is located between the fitting section and the connecting member.

[0010] Beneficial effects: in this form of connecting portion, when the connecting portion is pulled by external force, the bending section can bear part of the deformation by bending itself, thereby preventing tearing of the connecting portion and failure of the connecting portion.

[0011] In an alternative embodiment, the connecting member includes a first fitting portion and a second fitting portion, the first fitting portion is connected to the bus bar, the connecting structure is located on the second fitting portion, the reinforcing member is located between the second fitting portion and the connecting portion, the connecting portion is in abutting engagement with the reinforcing member through the connecting structure, and the connecting portion is electrically connected to the connecting structure.

[0012] Beneficial effects: the clamping connection mode has a smaller fitting surface, can enable the connecting structure and the connecting portion to be in continuous and stable contact, and makes the electrical connection between the connecting structure and the connecting portion more reliable.

[0013] In an alternative embodiment, the connecting portion includes a conductive member and an insulating layer, the insulating layer is arranged on the surface of the conductive member, and the conductive member is provided with an opening at the insulating layer away from the reinforcing member, and the connecting structure is in abutting engagement with the conductive member through the opening.

[0014] Beneficial effects: in this form of connecting portion, the insulating layer not only effectively protects the conductive member from external impact, but also improves the electrical connection safety of the conductive member, and only the conductive member at the opening is exposed, thereby preventing the conductive member from being in contact with external components.

[0015] In an alternative embodiment, the connecting portion has a length extending in a first direction and a length extending in a second direction, the first direction and the second direction intersect, the connecting structure is arranged in pairs on both sides of the second fitting portion in the second direction, and multiple pairs of the connecting structure are arranged at intervals in the first direction of the second fitting portion.

[0016] Beneficial effects: in this form of arrangement of the connecting structure, if one of the connecting structures is broken or loosened, the electrical connection will not be affected, thereby effectively improving the stability and reliability of the clamping connection.

[0017] In an optional implementation, the connecting structure has a dimension in the first direction less than or equal to 4 mm; and / or, the connecting portion has a dimension in the second direction greater than or equal to 3 mm.

[0018] Beneficial effects: the connecting structure in this form can avoid occupying too much space while meeting the strength and stability requirements, and the connecting portion in this form has higher structural strength and is less likely to tear.

[0019] In an optional implementation, the reinforcing member is an insulating member; and / or, the reinforcing member has a thickness greater than or equal to 0.2 mm.

[0020] Beneficial effects: the reinforcing member in this form has higher structural strength and is less likely to deform while supporting the connecting portion, thereby improving the insulation reliability between the second mating portion and the connecting portion.

[0021] In an optional implementation, the collecting assembly further includes a mounting bracket, the number of busbars is a plurality, the plurality of busbars are arranged at intervals on the mounting bracket, the connecting portion of the circuit board is arranged in one-to-one correspondence with the busbars, and the circuit board is bonded to the mounting bracket through the connecting block.

[0022] Beneficial effects: the mounting bracket can simultaneously carry the busbars and the circuit board, and can fix the relative positions of the busbars and the circuit board, thereby avoiding pulling the connecting portion due to relative movement of the busbars and the circuit board.

[0023] In a second aspect, the utility model also provides a battery pack, it includes: box body, have accommodating space multiple electric core, set up in accommodating space, every electric core opposite both ends are provided with pole; The collecting assembly described above is set in the accommodating space, and the poles of adjacent electric cores are electrically connected through the busbar of the collecting assembly. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0025] Figure 1 It is a three-dimensional schematic view of the electric core signal collecting assembly of the battery pack of the utility model embodiment;

[0026] Figure 2 It is Figure 1 It is a local enlarged schematic view of the collecting assembly shown in the drawing;

[0027] Figure 3for Figure 1 The diagram shows a partial view of the acquisition components in an exploded state.

[0028] Figure 4 for Figure 1 A three-dimensional schematic diagram of the connector of the acquisition component shown;

[0029] Figure 5 for Figure 1 The diagram shown illustrates the acquisition component's circuit board before assembly.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Circuit board; 101. Connecting part; 1011. Mating section; 1012. Bending section; 1013. Opening; 102. Main body;

[0032] 2. Connecting component; 201. First mating part; 202. Second mating part; 203. Connecting structure;

[0033] 3. Busbar; 4. Reinforcing component; 5. Mounting bracket; 6. Connecting block;

[0034] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] The following is combined with Figures 1 to 5 The following describes embodiments of the present invention.

[0037] In related technologies, since the terminals of the blade battery cell are located at both ends of the cell, the terminals are usually close to the inner wall of the housing, resulting in a small operating space near the terminals. Therefore, it is difficult to perform the welding process effectively, which in turn makes it difficult to assemble the acquisition components when replacing the battery cell.

[0038] According to an embodiment of the present invention, a cell signal acquisition component for a battery pack is provided, comprising: a circuit board 1, a connector 2, and a busbar 3 stacked on top of each other; wherein the circuit board 1 includes a main body 102 and a connecting portion 101 extending outward from a portion of the main body 102, the connecting portion 101 being electrically connected to the busbar 3 via the connector 2; the connector 2 having a connecting structure 203 having a shape that bends and extends from the side of the connector 2 to form a shape suitable for clamping at least a portion of the connecting portion 101, such that the connecting portion 101 and the connecting structure 203 are detachably connected.

[0039] Using the acquisition component of this embodiment, a connection structure 203 is provided on the connector 2. The connection part 101 of the circuit board 1 can be detachably connected to the connector 2 through the connection structure 203. Compared with the original welding connection method, the circuit board 1 can be repeatedly removed and installed without destructive disassembly, reducing the possibility of material scrap when replacing battery cells in the battery pack. It is also more convenient for operators to inspect and maintain the battery cells. In addition, the circuit board 1 is an integral component, which can effectively reduce the number of components and reduce the operation steps when assembling the circuit board 1. It effectively solves the problem that the existing connection method between the battery cell and the acquisition component is difficult to inspect and maintain.

[0040] Specifically, there is no limitation on the type of circuit board 1; it can be a rigid circuit board or a flexible circuit board. There is no limitation on the shape of the connecting part 101; it can be rectangular, curved, or irregular in shape, and can be flexibly selected according to the requirements.

[0041] It is understood that, as an alternative implementation, the connecting part 101 may also be a separate component connected to the main body 102.

[0042] In one possible implementation, a reinforcing member 4 is also included. The circuit board 1 is a flexible circuit board. The reinforcing member 4 has a supporting surface for supporting the connecting part 101. The connecting part 101 abuts against the connecting member 2 through the reinforcing member 4. The reinforcing member 4 is provided between the connecting part 101 and the connecting member 2. The reinforcing member 4 can not only support the connecting part 101, improve the structural strength of the connecting part 101 and its durability in the process of repeated disassembly and reassembly, and prevent the connecting part 101 from deforming, but also enable the connecting part 101 and the connecting member 2 to fit more tightly, thereby improving the connection reliability between the two.

[0043] Furthermore, such as Figure 3 As shown, the reinforcing member 4 is a sheet-like component. By increasing the thickness of the connecting part 101 in the third direction Z, the bending resistance and strength of the connecting part 101 can be improved. Therefore, the specific stiffness of the reinforcing member 4 is not limited, as long as it can improve the bending resistance of the connecting part 101.

[0044] In one possible implementation, the connecting part 101 includes a mating section 1011 and a bending section 1012. The mating section 1011 is connected to the main body 102 through the bending section 1012. The mating section 1011 and the connecting structure 203 form a detachable connection. The reinforcing member 4 is located between the mating section 1011 and the connecting member 2. In this type of connecting part 101, when the connecting part 101 is pulled by an external force, the bending section 1012 can withstand a part of the deformation by bending itself, preventing tearing on the connecting part 101 and causing it to fail.

[0045] Specifically, the bending method of the bending section 1012 is not limited. It can be a bending structure formed by bending in any plane. The bending method of the bending section 1012 can be flexibly selected according to the direction of tension that is likely to occur when the connecting part 101 is actually subjected to force.

[0046] Preferably, such as Figure 3 As shown, the mating section 1011 and the bending section 1012 are both sheet-like structures in the same plane, and the bending section 1012 is a bending structure that extends in an S-shape in the same plane.

[0047] Furthermore, one end of the bent section 1012 is connected to the mating section 1011, and the other end is connected to the main body 102. The width of the end of the bent section 1012 near the mating section 1011 and the main body 102 is larger than the width of its own bent portion, which can effectively improve the stability and reliability of the bent section 1012 after connection, improve the local strength of the connection position, and avoid breakage or tearing.

[0048] In one possible implementation, the connector 2 includes a first mating part 201 and a second mating part 202. The first mating part 201 is connected to the busbar 3. The connecting structure 203 is located on the second mating part 202. The reinforcing member 4 is located between the second mating part 202 and the connecting part 101. The connecting part 101 abuts against the reinforcing member 4 through the connecting structure 203. The connecting part 101 is electrically connected to the connecting structure 203. The mating surface of the clamping connection method is smaller. Compared with large-area bonding, it can make the connecting structure 203 and the connecting part 101 continuously and stably contacted, making the electrical connection between the connecting structure 203 and the connecting part 101 more reliable.

[0049] It is understood that, as an alternative implementation, the reinforcing member 4 may also be located between the connecting structure 203 and the connecting part 101, with the connecting part 101 electrically connected to the second mating part 202, and the connecting structure 203 pressing down the reinforcing member 4 to tightly fit the connecting part 101 and the second mating part 202 together.

[0050] In addition, in order to further ensure that the connecting part 101 is only electrically connected to the connecting structure 203, the reinforcing member 4 is made of an insulating material, such as plastic or rubber, so as to effectively isolate the connecting part 101 from the second mating part 202.

[0051] In one possible implementation, such as Figure 3 As shown, the connecting part 101 includes a conductive element and an insulating layer. The insulating layer covers the surface of the conductive element. An opening 1013 is provided in the insulating layer on the side of the conductive element away from the reinforcing member 4. The connecting structure 203 abuts against the conductive element through the opening 1013. In this type of connecting part 101, the insulating layer can effectively protect the conductive element and prevent foreign objects from colliding with it. At the same time, it can also improve the electrical connection safety of the conductive element. Only the conductive element at the opening 1013 is exposed, preventing the conductive element from contacting external components at will.

[0052] It is understood that, as an alternative implementation, the connecting part 101 may also be a component that only has conductive elements.

[0053] Specifically, there are no restrictions on the size and shape of the opening 1013. The shape of the opening 1013 can be rectangular, circular, or strip-shaped, and the size of the opening 1013 can be selected according to the size of the connecting structure 203.

[0054] In one possible implementation, the connecting portion 101 has a length extending in a first direction X and a length extending in a second direction Y, the first direction X and the second direction Y intersect, and the connecting structures 203 are arranged in pairs on both sides of the second mating portion 202 in the second direction Y. Multiple pairs of connecting structures 203 are spaced apart in the first direction X of the second mating portion 202. This arrangement of the connecting structures 203 can prevent electrical connection failure caused by the breakage or loosening of one of the connecting structures 203, and can effectively improve the stability and reliability of the clamping connection.

[0055] Specifically, the number of pairs of connection structures 203 is not strictly limited and can be two, three, or four or more; the spacing between two adjacent pairs of connection structures 203 is not limited and can be flexibly selected.

[0056] In one possible implementation, the dimension of the connecting structure 203 in the first direction X is less than or equal to 4 mm. This type of connecting structure 203 can meet the requirements of strength and stability while avoiding the connecting structure 203 occupying too much space.

[0057] Specifically, such as Figure 4 As shown, the dimension indicated by B is the dimension of the connecting structure 203 in the first direction X.

[0058] In one possible implementation, the dimension of the connecting portion 101 in the second direction Y is greater than or equal to 3 mm. This type of connecting portion 101 has higher structural strength and is less prone to tearing.

[0059] Specifically, such as Figure 3 As shown, the dimension shown in A is the dimension of the connecting part 101 in the second direction Y.

[0060] In one possible implementation, the reinforcing member 4 is an insulating member to improve the insulation reliability between the second mating part 202 and the connecting part 101.

[0061] In one possible implementation, the thickness of the reinforcing member 4 is greater than or equal to 0.2 mm. This type of reinforcing member 4 has higher structural strength and is less prone to deformation while supporting the connecting part 101.

[0062] Specifically, the thickness of the reinforcing member 4 is the thickness in the Z direction of the third direction.

[0063] In one possible implementation, the acquisition component further includes a mounting bracket 5, and multiple busbars 3 are provided at intervals on the mounting bracket 5. The connecting part 101 of the circuit board 1 is provided in a one-to-one correspondence with the busbars 3. The circuit board 1 is bonded to the mounting bracket 5 through the connecting block 6. The mounting bracket 5 can simultaneously support the busbars 3 and the circuit board 1, which can make the relative positions of the busbars 3 and the circuit board 1 relatively fixed, and avoid the busbars 3 and the circuit board 1 from moving relative to each other and pulling the connecting part 101.

[0064] It is understood that, as an alternative implementation, the circuit board 1 can also be detachably connected to the mounting bracket 5 via a snap-fit ​​or fastener.

[0065] Preferably, the connecting block 6 is made of foam adhesive.

[0066] In one possible implementation, the first mating part 201 and the busbar 3 are welded together.

[0067] In one possible implementation, the connector 2 is a nickel sheet, and the first mating part 201 and the second mating part 202 are arranged sequentially along the first direction X; the connecting structure 203 is a claw formed by punching and bending the edge of the second mating part 202.

[0068] According to an embodiment of the present invention, in another aspect, a battery pack is provided, comprising: a housing, a plurality of battery cells, and the aforementioned acquisition component. The housing has an accommodating space, the plurality of battery cells are disposed in the accommodating space, and each battery cell has terminals at opposite ends. The acquisition component is disposed in the accommodating space, and the terminals of adjacent battery cells are electrically connected through the busbar 3 of the acquisition component.

[0069] Specifically, the battery cell is a blade battery cell.

[0070] Although embodiments of the present invention have been described in conjunction with 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, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A cell signal acquisition component for a battery pack, characterized in that, include: The circuit boards (1), connectors (2), and busbars (3) are stacked on top of each other; among them, The circuit board (1) includes a main body (102) and a connecting portion (101) extending outward from a portion of the main body (102), the connecting portion (101) being electrically connected to the busbar (3) via the connector (2); The connector (2) has a connecting structure (203) having a shape that bends and extends from the side of the connector (2) to form at least a portion of the connecting portion (101), such that the connecting portion (101) and the connecting structure (203) form a detachable connection.

2. The cell signal acquisition component of the battery pack according to claim 1, characterized in that, It also includes a reinforcing member (4), the circuit board (1) is a flexible circuit board, the reinforcing member (4) has a supporting surface for supporting the connecting part (101), and the connecting part (101) abuts against the connecting member (2) through the reinforcing member (4).

3. The cell signal acquisition component of the battery pack according to claim 2, characterized in that, The connecting part (101) includes a mating section (1011) and a bending section (1012). The mating section (1011) is connected to the main body (102) through the bending section (1012). The mating section (1011) and the connecting structure (203) form a detachable connection. The reinforcing member (4) is located between the mating section (1011) and the connecting member (2).

4. The cell signal acquisition component of the battery pack according to claim 2 or 3, characterized in that, The connector (2) includes a first mating part (201) and a second mating part (202). The first mating part (201) is connected to the busbar (3). The connecting structure (203) is located on the second mating part (202). The reinforcing member (4) is located between the second mating part (202) and the connecting part (101). The connecting part (101) abuts against the reinforcing member (4) through the connecting structure (203). The connecting part (101) is electrically connected to the connecting structure (203).

5. The cell signal acquisition component of the battery pack according to claim 4, characterized in that, The connecting part (101) includes a conductive element and an insulating layer. The insulating layer covers the surface of the conductive element. An opening (1013) is provided in the insulating layer on the side of the conductive element away from the reinforcing member (4). The connecting structure (203) abuts against the conductive element through the opening (1013).

6. The cell signal acquisition component of the battery pack according to claim 4, characterized in that, The connecting portion (101) has an extension length in a first direction (X) and an extension length in a second direction (Y), the first direction (X) and the second direction (Y) intersect, the connecting structures (203) are arranged in pairs on both sides of the second mating portion (202) in the second direction (Y), and multiple pairs of the connecting structures (203) are spaced apart in the first direction (X) of the second mating portion (202).

7. The cell signal acquisition component of the battery pack according to claim 6, characterized in that, The dimension of the connecting structure (203) in the first direction (X) is less than or equal to 4 mm; And / or, the dimension of the connecting portion (101) in the second direction (Y) is greater than or equal to 3 mm.

8. The cell signal acquisition component of the battery pack according to claim 2 or 3, characterized in that, The reinforcing member (4) is an insulating member; And / or, the thickness of the reinforcing member (4) is greater than or equal to 0.2 mm.

9. The cell signal acquisition component of the battery pack according to any one of claims 1 to 3, characterized in that, The acquisition component also includes a mounting bracket (5), and there are multiple busbars (3). The multiple busbars (3) are spaced apart on the mounting bracket (5). The connecting part (101) of the circuit board (1) is correspondingly arranged with the busbars (3). The circuit board (1) is bonded to the mounting bracket (5) through a connecting block (6).

10. A battery pack, characterized in that, include: The container has storage space; Multiple battery cells are disposed in the receiving space, and each battery cell has a terminal post at its opposite ends; The cell signal acquisition component of the battery pack according to any one of claims 1 to 9 is disposed in the accommodating space, and the terminals of adjacent cells are electrically connected through the busbar (3) of the acquisition component.

Images