WO2024114011A1

WO2024114011A1 - Battery information acquisition assembly and battery module

Info

Publication number: WO2024114011A1
Application number: PCT/CN2023/116758
Authority: WO
Inventors: 宁封锋
Original assignee: 湖北亿纬动力有限公司
Priority date: 2022-12-02
Filing date: 2023-09-04
Publication date: 2024-06-06
Also published as: CN115775955A

Abstract

A battery information acquisition assembly and a battery module. The battery information acquisition assembly comprises a support, a busbar and an acquisition unit. The busbar comprises a plurality of welding parts; the acquisition unit comprises a flexible circuit board; the flexible circuit board and the welding parts are arranged in a staggered mode, so that no interference is generated between the flexible circuit board and the busbar in an assembly process, thereby forming an integrated structure by the support, the busbar and the acquisition unit. The difficulty in assembling the battery information acquisition assembly is reduced, and the cost is saved.

Description

Battery information collection components and battery modules

This application claims the priority of the Chinese patent application filed with the China Patent Office on December 2, 2022, with application number 202211543457.8. The entire contents of the above application are incorporated by reference into this application.

Technical Field

The present application relates to the field of battery technology, and in particular to a battery information collection component and a battery module.

Background technique

With the country's vigorous promotion and popularization of power batteries, the application of power batteries has become more mature and common. In order to ensure the safety of power batteries, it is necessary to collect and monitor the voltage and temperature of power battery modules.

In the battery module of the related technology, there are a large number of grouped monomers in the battery information collection component (Cell Contacting System component, abbreviated as: CCS component) for voltage and temperature collection and monitoring. Since the grouped monomers will affect each other, the assembly defect rate is high, resulting in a low degree of integration of the battery information collection component, which in turn makes the assembly process of the battery information collection component more complicated, greatly increasing the production and manufacturing cost of the battery information collection component.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a battery information acquisition component and a battery module, which can reduce the assembly defect rate while improving the integration level of the battery information acquisition component, thereby improving the technical problems of complex assembly process and high production cost of the battery information acquisition component.

In a first aspect, an embodiment of the present application provides a battery information acquisition component, which includes: a bracket; a bus, which is arranged on a side of the bracket facing a first direction and includes a plurality of welding parts; a collection piece, which includes at least one flexible circuit board; in the first direction, the flexible circuit board and the welding part are staggered.

In one embodiment, at least a portion of the flexible circuit board is disposed on a side wall of the bracket, and the flexible circuit board is fixedly connected or detachably connected to the side wall.

In one embodiment, the bracket includes: a bracket body, the bus is arranged on a side of the bracket body facing the first direction; a support plate is arranged on a side of the bracket body away from or facing the first direction and is located at an edge of the bracket body, and the positive projection of the flexible circuit board on the side wall of the bracket overlaps with at least part of the support plate.

In one embodiment, the support plate is arranged on a side of the bracket body away from the first direction; the bracket also includes an assembly guide structure, which is arranged on a side of the bracket body away from the first direction and is fixedly connected to the bracket body and the support plate respectively.

In one embodiment, the bracket body includes a plurality of first openings, and the first openings penetrate the bracket body along the first direction; the bus includes a plurality of bus monomers, each of the bus monomers includes at least one welding portion, and the welding portion is correspondingly embedded in the first opening; the collection member includes a plurality of voltage collection portions, and the voltage collection portions are arranged one by one corresponding to the bus monomers, and the voltage collection portion includes a first portion, a second portion and a bending portion, the first portion is electrically connected to the bus monomer, the second portion is electrically connected to the flexible circuit board arranged on the side wall, and the bending portion electrically connects the first portion and the second portion.

In one embodiment, the collection component includes a plurality of temperature collection parts, the temperature collection parts include a temperature sensing component and a wiring harness, and the temperature sensing component is electrically connected to the flexible circuit board through the wiring harness; the bracket includes a plurality of limiting parts, the limiting part is arranged on a side of the bracket body away from the first direction, and at least a portion of the wiring harness is embedded in the limiting part.

In one embodiment, a colloid is provided between the limiting portion and the wiring harness.

In one embodiment, the bracket body includes a plurality of second openings, the second openings penetrate the bracket body along the first direction, and the temperature sensing component is embedded in the second openings.

In one embodiment, the temperature sensing component includes a shell, a water drop head temperature sensing element and adhesive backing, the shell and the adhesive backing are arranged to form a accommodating space, and the water drop head temperature sensing element is arranged in the accommodating space.

In one embodiment, the temperature collecting unit further includes a limit frame, and the limit frame is arranged at the connection between the flexible circuit board and the wiring harness.

In a second aspect, an embodiment of the present application provides a battery module, comprising a battery information acquisition component and a battery cell group as described in any of the above items, wherein the battery cell group comprises a plurality of battery cells, and the bracket and bus in the battery information acquisition component are stacked on the battery cell group in sequence along a first direction, the battery cell comprises a positive electrode and a negative electrode, and the welding portion in the bus is fixedly connected to the positive electrode or the negative electrode of the battery cell.

In one embodiment, the bracket includes: a bracket body, the bus is arranged on a side of the bracket body facing the first direction; a support plate, arranged on a side of the bracket body away from the first direction and located at an edge of the bracket body; an assembly guide structure, arranged on a side of the bracket body away from the first direction and fixedly connected to the bracket body and the support plate respectively; the assembly guide structure is provided with a contoured surface matching at least a portion of the side wall of the battery cell.

Beneficial Effects

The beneficial effects of the present application are as follows: the embodiments of the present application provide a battery information collection component and a battery module, the battery information collection component includes a bracket, a bus and a collection piece, the bus is arranged on the side of the bracket facing the first direction, and includes a plurality of welding parts; the collection piece includes at least one flexible circuit board, and in the first direction, the flexible circuit board and the welding part are staggered. In the battery information collection component provided by the present application, since the flexible circuit board and the welding part are staggered in the first direction, there will be no interference between the flexible circuit board and the bus during the assembly process of the battery information collection component with the battery cell in the battery module, thereby enabling the bracket, the bus and the collection piece to form an integrated structure, reducing the difficulty of assembling the battery information collection component and saving the production cost.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

FIG. 1 is a three-dimensional schematic diagram of a battery information collection component provided in an embodiment of the present application from one viewing angle.

FIG. 2 is a three-dimensional schematic diagram of a battery cell provided in an embodiment of the present application.

FIG3 is a three-dimensional schematic diagram of a battery information collection component provided in an embodiment of the present application from another perspective.

FIG. 4 is a partial enlarged view of region A in FIG. 3 provided in an embodiment of the present application.

FIG. 5 is a partial enlarged view of area B in FIG. 3 provided in an embodiment of the present application.

FIG. 6 is a partial enlarged view of region C in FIG. 1 provided in an embodiment of the present application.

Figure Number:

Bracket 10; side wall 101; bracket body 11; first opening 111; second opening 112; support plate 12; assembly guide structure 13; limit part 14; bus 20; reinforcing rib 15; welding part 201; bus monomer 21; series row 211; series long row 212; input row 213; output row 214; collection piece 30; flexible circuit board 31; voltage collection part 32; first part 321; second part 322; bending part 323; temperature collection part 33; temperature sensing component 331; shell 3311; adhesive 3312; wiring harness 332; limit frame 333; battery cell 40; positive electrode 41; negative electrode 42; first direction Y;

Embodiments of the present invention

In the related art, there are a large number of grouped monomers in the battery information collection component for voltage and temperature collection and monitoring, specifically including a bracket, a bus and a collection piece stacked in sequence, the bus including multiple welding parts, the collection piece including a flexible circuit board, and the flexible circuit board will cover part of the welding part. Since the battery information collection component needs to be assembled with the battery cell group later, specifically, the welding part in the bus is welded to each battery cell in the battery cell group, and when the welding part is welded to the battery cell, it is necessary to use welding tools to apply pressure to the welding part to ensure the welding quality.

The welding part covered by the flexible circuit board often has a problem of cold welding due to insufficient pressing force. At the same time, the flexible circuit board will be crushed by the welding tool, which greatly increases the assembly defect rate. In order to reduce the defect rate, the flexible circuit board can only be assembled after the assembly of the busbar and the battery cell group is completed, which makes the integration degree of the battery information collection component low, and further makes the assembly process of the battery information collection component more complicated, which greatly increases the production cost of the battery information collection component.

In order to solve the above problems, an embodiment of the present application provides a battery information collection component and a battery module.

Exemplarily, FIG1 is a three-dimensional schematic diagram of a battery information collection component provided in an embodiment of the present application from a perspective. FIG2 is a three-dimensional schematic diagram of a battery cell provided in an embodiment of the present application. Referring to FIG1 and FIG2, the battery information collection component provided in an embodiment of the present application includes: a bracket 10, a bus 20 and a collection piece 30. The bus 20 is arranged on the side of the bracket 10 facing the first direction Y, and includes a plurality of welding portions 201; the collection piece 30 includes at least one flexible circuit board 31; in the first direction Y, the flexible circuit board 31 and the welding portion 201 are staggered.

In the battery information acquisition component provided in the present application, the welding portion 201 is arranged on the side of the bracket 10 facing the first direction Y. Since the flexible circuit board 31 and the welding portion 201 are staggered in the first direction Y, when a welding tool is arranged on the side of the bus 20 facing the first direction Y, and the welding portion 201 is welded to the battery cell 40 arranged on the side of the bracket 10 away from the first direction Y, the welding tool can avoid the flexible circuit board 31 and tightly press the welding portion 201, thereby improving the product yield.

Furthermore, since the flexible circuit board 31 does not affect the welding process between the welding portion 201 in the bus 20 and the battery cell 40, the bracket 10, the bus 20 and the flexible circuit board 31 can be assembled with the battery cell 40 after being integrated into one piece, thereby greatly improving the integration of the battery information collection component and reducing the assembly difficulty and production cost of the battery information collection component.

In some embodiments of the present application, at least a portion of the flexible circuit board 31 is disposed on the side wall 101 of the bracket 10 , and the flexible circuit board 31 is fixedly connected or detachably connected to the side wall 101 .

In the related art, the size of the flexible circuit board 31 in the battery information collection component is often large, and it needs to be electrically connected to each component with the information collection function. The present application can fully utilize the space on the bracket 10 by setting at least part of the flexible circuit board 31 on the side wall 101 of the bracket 10, and integrate and fix the flexible circuit board 31 while ensuring that the flexible circuit board 31 and the welding part 201 are staggered in the first direction Y.

Optionally, the flexible circuit board 31 disposed on the side wall 101 of the bracket 10 is electrically connected to each component having an information collection function in the collection member 30 .

Optionally, a plurality of protrusions are provided on the side wall 101, and the flexible circuit board 31 provided on the side wall 101 of the bracket 10 is formed with positioning holes at positions corresponding to the protrusions, and the flexible circuit board 31 cooperates with the protrusions through the positioning holes, thereby realizing a detachable connection with the side wall 101. Of course, in other embodiments of the present application, the flexible circuit board 31 provided on the side wall 101 of the bracket 10 can also be detachably connected to the side wall 101 by means of threaded connection, or fixedly connected to the side wall 101 by means of colloid fixation or hot riveting fixation.

In some embodiments of the present application, the bracket 10 includes: a bracket body 11 and a support plate 12. The busbar 20 is arranged on a side of the bracket body 11 facing the first direction Y; the support plate 12 is arranged on a side of the bracket body 11 away from or facing the first direction Y and is located at an edge of the bracket body 11, and the orthographic projection of the flexible circuit board 31 on the side wall 101 of the bracket 10 overlaps at least part of the support plate 12.

In the battery information acquisition assembly provided in the present application, since the bracket 10 also includes the support plate 12 disposed on the side of the bracket body 11 away from or toward the first direction Y, and the orthographic projection of the flexible circuit board 31 on the side wall 101 of the bracket 10 overlaps at least partially with the support plate 12, the side wall 101 of the bracket 10 can provide a wider installation space for the flexible circuit board 31, which is conducive to the support and fixation of the flexible circuit board 31 disposed on the side wall 101 of the bracket 10. In addition, the setting of the support plate 12 can further provide support for the bracket body 11, avoiding the deformation problem of the bracket body 11 caused by the excessive extension length.

Optionally, the support plate 12 extends along the length direction of the bracket body 11 , the bracket body 11 and the support plate 12 are integrally formed, and the bracket body 11 and the support plate 12 are made of the same material, for example, both are made of plastic.

Furthermore, the thickness of the support plate 12 is greater than or equal to 1.5 mm, such as 1.5 mm, 2 mm, 2.5 mm, 3 mm; the width of the support plate 12 is greater than or equal to 55 mm, such as 55 mm, 60 mm, 70 mm; the length of the support plate 12 is greater than or equal to the length of the flexible circuit board 31 arranged on the side wall 101 of the bracket 10.

FIG3 is a three-dimensional schematic diagram of a battery information collection assembly provided in an embodiment of the present application from another perspective; FIG4 is a partial enlarged view of region A in FIG3 provided in an embodiment of the present application. Referring to FIGS. 1 to 4, in some embodiments of the present application, the support plate 12 is disposed on a side of the support body 11 away from the first direction Y; the support 10 further includes an assembly guide structure 13, which is disposed on a side of the support body 11 away from the first direction Y and is fixedly connected to the support body 11 and the support plate 12, respectively.

In the battery information acquisition assembly provided in the present application, since the support plate 12 is arranged on the side of the bracket body 11 away from the first direction Y, and the assembly guide structure 13 is arranged on the side of the bracket body 11 away from the first direction Y. Therefore, the assembly guide structure 13 and the support plate 12 are arranged in the same direction relative to the bracket body 11. In addition, since the assembly guide structure 13 is fixedly connected to the bracket body 11 and the support plate 12 respectively, the assembly guide structure 13 can further fix and support the bracket body 11 and the support plate 12, and further improve the support strength and anti-deformation ability of the bracket 10.

Furthermore, when the battery information collection component is assembled with the battery cell 40, the assembly guide structure 13 corresponds to the position of the side wall 101 of the battery cell 40, and the assembly guide structure 13 is provided with a contoured surface matching at least part of the side wall of the battery cell 40, so that during the assembly process of the battery information collection component with the battery cell 40, the battery information collection component can only move along the axial direction of the battery cell 40, thereby improving the assembly efficiency of the battery information collection component with the battery cell 40.

In some embodiments of the present application, the bracket 10 further includes a reinforcing rib 15, which is disposed on a side of the bracket body 11 away from the first direction Y and is respectively fixedly connected to the bracket body 11 and the support plate 12. The reinforcing rib 15 is spaced apart from the assembly guide structure 13.

In the battery information acquisition component provided in the present application, since the reinforcing rib 15 is arranged on the side of the bracket body 11 away from the first direction Y, and is fixedly connected to the bracket body 11 and the support plate 12 respectively, it can further fix and support the bracket body 11 and the support plate 12, and further enhance the supporting strength and anti-deformation ability of the bracket 10.

FIG5 is a partial enlarged view of the B area in FIG3 provided by an embodiment of the present application. Referring to FIG1 to FIG5, in some embodiments of the present application, the bracket body 11 includes a plurality of first openings 111, and the first openings 111 penetrate the bracket body 11 along the first direction Y; the busbar 20 includes a plurality of busbar monomers 21, each of the busbar monomers 21 includes at least one welding portion 201, and the welding portion 201 is correspondingly embedded in the first opening 111; the acquisition member 30 includes a plurality of voltage acquisition portions 32, and the voltage acquisition portions 32 are arranged one by one with the busbar monomers 21, and the voltage acquisition portion 32 includes a first portion 321, a second portion 322 and a bending portion 323, the first portion 321 is electrically connected to the busbar monomer 21, the second portion 322 is electrically connected to the flexible circuit board 31 arranged on the side wall 101, and the bending portion 323 electrically connects the first portion 321 and the second portion 322.

In the battery information collection assembly provided by the present application, since the first opening 111 penetrates the bracket body 11 along the first direction Y, when the battery information collection assembly is assembled with the battery cell 40, the welding portion 201 embedded in the first opening 111 in the busbar monomer 21 can pass through the first opening 111 to be electrically connected to the positive electrode 41 or the negative electrode 42 of the battery cell 40. Exemplarily, referring to FIG. 1, the busbar monomer 21 includes a series row 211, a series long row 212, an input row 213 and an output row 214. The busbar 20 includes a plurality of series rows 211 arranged along the length direction of the bracket body 11, and a plurality of series rows 211 arranged along the width direction of the bracket body 11, each of the series rows includes four first connecting pieces arranged at intervals and connected to each other in the width direction of the bracket body 11, and each first connecting piece includes two welding portions 201, and the two welding portions 201 are respectively a negative electrode 42 welding portion 201 and a positive electrode 41 welding portion 201. The busbar 20 further includes the series long row 212 disposed on one side of the series row 211, the series long row 212 includes eight second connection pieces spaced apart and connected to each other in the width direction of the bracket body 11, each of the second connection pieces includes a welding portion 201. The busbar 20 further includes an input row 213 and an output row 214 disposed on the other side of the series row 211, the input row 213 includes four third connection pieces spaced apart and connected to each other in the width direction of the bracket body 11, each of the third connection pieces includes a welding portion 201; the output row 214 includes four fourth connection pieces spaced apart and connected to each other in the width direction of the bracket body 11, each of the fourth connection pieces includes a welding portion 201.

In the battery information collection component provided in the present application, the voltage collection part 32 is a component with an information collection function, and the voltage collection part 32 is, for example, a nickel sheet. The first part 321 of the voltage collection part 32 is electrically connected to the busbar monomer 21, and the second part 322 of the voltage collection part 32 is electrically connected to the flexible circuit board 31 disposed on the side wall 101. Since the busbar monomer 21 and the flexible circuit board 31 disposed on the side wall 101 are staggered in the first direction Y, in order to ensure that the voltage collection part 32 can smoothly transmit the voltage information on the busbar monomer 21 to the flexible circuit board 31 disposed on the side wall 101, the voltage collection part 32 also includes the bending part 323 electrically connecting the first part 321 and the second part 322. Optionally, the first part 321 is electrically connected to the busbar monomer 21 by laser welding, and the connection between the first part 321 and the busbar monomer 21 avoids the welding part 201; the second part 322 is electrically connected to the flexible circuit board 31 arranged on the side wall 101 by soldering.

Figure 6 is a partial enlarged view of the C area in Figure 1 provided by an embodiment of the present application. Referring to Figures 4 to 6, in some embodiments of the present application, the collection member 30 includes a plurality of temperature collection parts 33, and the temperature collection part 33 includes a temperature sensing component 331 and a wiring harness 332. The temperature sensing component 331 is electrically connected to the flexible circuit board 31 arranged on the side wall 101 through the wiring harness 332; the bracket 10 includes a plurality of limiting parts 14, and the limiting part 14 is arranged on the side of the bracket body 11 away from the first direction Y, and at least part of the wiring harness 332 is embedded in the limiting part 14.

In the battery information acquisition component provided in the present application, the temperature acquisition unit 33 is another element having an information acquisition function. Optionally, the number of the temperature acquisition units 33 is less than the number of the voltage acquisition units 32. Exemplarily, the acquisition unit includes two flexible circuit boards 31, and each of the flexible circuit boards 31 is electrically connected to the two temperature acquisition units 33.

Since the bracket 10 includes a plurality of limiting portions 14 arranged on the side of the bracket body 11 away from the first direction Y, at least a portion of the wiring harness 332 can be embedded in the limiting portion 14, so that the wiring harness 332 can be stably fixed on the side of the bracket body 11 away from the first direction Y.

Optionally, the inner wall of the limiting portion 14 contacts the wire harness 332 embedded in the limiting portion 14 , so that the wire harness 332 is fixed by using the inner wall of the limiting portion 14 .

Furthermore, in order to further improve the fixing strength between the wire harness 332 and the limiting portion 14 and ensure the fixing effect of the wire harness 332 , a colloid (not shown in the figure) is provided between the limiting portion 14 and the wire harness 332 .

In some embodiments of the present application, the bracket body 11 includes a plurality of second openings 112 , the second openings 112 penetrate the bracket body 11 along the first direction Y, and the temperature sensing component 331 is embedded in the second openings 112 .

In the battery information acquisition component provided in the present application, since the second opening 112 passes through the bracket body 11 along the first direction Y, when the battery information acquisition component is assembled with the battery cell 40, the temperature sensing component 331 embedded in the second opening 112 can pass through the second opening 112 and contact the negative electrode 42 of the battery cell 40, thereby sensing the temperature of the battery cell 40 in real time.

In some embodiments of the present application, the temperature sensing component 331 includes a shell 3311, a water drop head temperature sensing element and a back glue 3312, the shell 3311 and the back glue 3312 are arranged to form a accommodating space, the water drop head temperature sensing element is arranged in the accommodating space, and the back glue 3312 is fixedly connected to the negative electrode 42 of the battery cell 40.

In the related art, when the water drop head temperature sensing element is in direct contact with the negative electrode 42 of the battery cell 40, it will be difficult to fix it because the contact surface of the water drop head temperature sensing element is uneven, and it may even fall off, seriously affecting the performance of the temperature sensing component 331. In the battery information acquisition component provided by the present application, since the shell 3311 and the back glue 3312 are surrounded to form a containing space, the water drop head temperature sensing element is arranged in the containing space, so that the direct contact between the water drop head temperature sensing element and the negative electrode 42 of the battery cell 40 can be effectively avoided. In addition, the present application can greatly improve the connection stability between the temperature sensing component 331 and the negative electrode 42 of the battery cell 40 by fixing the back glue 3312 to the negative electrode 42 of the battery cell 40. Optionally, the contact surface between the back glue 3312 and the negative electrode 42 of the battery cell 40 is rectangular.

4 , in some embodiments of the present application, the temperature collecting unit 33 further includes a limit frame 333 , and the limit frame 333 is disposed at the connection between the flexible circuit board 31 and the wiring harness 332 .

In the battery information collection assembly provided by the present application, the flexible circuit board 31 and the wiring harness 332 are fixed and electrically connected, for example, by welding. Since a limit frame 333 is provided at the connection between the flexible circuit board 31 and the wiring harness 332, the connection between the flexible circuit board 31 and the wiring harness 332 can be further fixed and protected by providing ultraviolet curing (UV) glue in the limit frame 333, and the limit frame 333 can limit the shape of the UV glue, so that the UV glue can achieve excellent fixing and sealing insulation effects, and further improve the connection stability between the flexible circuit board 31 and the wiring harness 332.

On the other hand, the present application also provides a battery module, which includes a battery cell group and a battery information collection component as described in any of the above items, the battery cell group includes a plurality of battery cells 40, the bracket 10 and the bus 20 in the battery information collection component are stacked on the battery cell group in sequence along a first direction Y, the battery cell 40 includes a positive electrode 41 and a negative electrode 42, and the welding portion 201 in the bus 20 is fixedly connected to the positive electrode 41 or the negative electrode 42 of the battery cell 40.

In some embodiments of the present application, the bracket 10 includes: a bracket body 11, the bus 20 is arranged on the side of the bracket body 11 facing the first direction Y; a support plate 12, arranged on the side of the bracket body 11 away from the first direction Y, and located at the edge of the bracket body 11; an assembly guide structure 13, arranged on the side of the bracket body 11 away from the first direction Y, and fixedly connected to the bracket body 11 and the support plate 12 respectively; the assembly guide structure 13 is provided with a contoured surface matching at least a portion of the side wall of the battery cell 40.

In the battery module provided in the present application, during the assembly process of the battery information acquisition component and the battery cell 40, the assembly guide structure 13 enables the battery information acquisition component to move only along the axial direction of the battery cell 40, thereby improving the assembly efficiency of the battery information acquisition component and the battery cell 40.

In summary, the present application provides a battery information acquisition component and a battery module, wherein the battery information acquisition component includes a bracket, a bus and a acquisition piece, wherein the bus is arranged on a side of the bracket facing a first direction and includes a plurality of welding parts; the acquisition piece includes at least one flexible circuit board, wherein in the first direction, the flexible circuit board and the welding part are staggered. In the battery information acquisition component provided by the present application, since in the first direction, the flexible circuit board and the welding part are staggered, during the assembly process of the battery information acquisition component with the battery cell in the battery module, no interference will be generated between the flexible circuit board and the bus, thereby enabling the bracket, the bus and the acquisition piece to form an integrated structure, thereby reducing the difficulty of assembling the battery information acquisition component and saving production costs.

Claims

A battery information collection component, the battery information collection component comprising:

Bracket (10);

A busbar (20), the busbar (20) being arranged on a side of the bracket (10) facing the first direction (Y) and comprising a plurality of welding portions (201);

A collecting member (30), wherein the collecting member (30) comprises at least one flexible circuit board (31);

In the first direction (Y), the flexible circuit board (31) and the welding portion (201) are arranged in a staggered manner.
The battery information acquisition component according to claim 1, wherein at least a portion of the flexible circuit board (31) is arranged on the side wall (101) of the bracket (10), and the flexible circuit board (31) is fixedly connected or detachably connected to the side wall (101).
The battery information acquisition assembly according to claim 2, wherein the bracket (10) comprises:

A bracket body (11), wherein the busbar (20) is arranged on a side of the bracket body (11) facing the first direction (Y);

A support plate (12), the support plate (12) being arranged on a side of the bracket body (11) away from or facing the first direction (Y) and located at an edge of the bracket body (11), and an orthographic projection of the flexible circuit board (31) on the side wall (101) of the bracket (10) at least partially overlapping with the support plate (12).
The battery information acquisition assembly according to claim 3, wherein the support plate (12) is arranged on a side of the bracket body (11) away from the first direction (Y);

The bracket (10) further comprises an assembly guide structure (13), wherein the assembly guide structure (13) is arranged on a side of the bracket body (11) away from the first direction (Y), and is fixedly connected to the bracket body (11) and the support plate (12) respectively.
The battery information acquisition assembly according to claim 3 or 4, wherein the bracket body (11) comprises a plurality of first openings (111), and the first openings (111) penetrate the bracket body (11) along the first direction (Y);

The busbar (20) comprises a plurality of busbar monomers (21), each of the busbar monomers (21) comprises at least one welding portion (201), and the welding portion (201) is correspondingly embedded in the first opening (111);

The collecting member (30) comprises a plurality of voltage collecting parts (32), the voltage collecting parts (32) being arranged in one-to-one correspondence with the busbar monomers (21), the voltage collecting parts (32) comprising a first part (321), a second part (322) and a bending part (323), the first part (321) being electrically connected to the busbar monomer (21), the second part (322) being electrically connected to the flexible circuit board (31) arranged on the side wall (101), and the bending part (323) being electrically connected to the first part (321) and the second part (322).
The battery information acquisition component according to claim 3 or 4, wherein the acquisition component (30) comprises a plurality of temperature acquisition parts (33), the temperature acquisition part (33) comprises a temperature sensing component (331) and a wiring harness (332), and the temperature sensing component (331) is electrically connected to the flexible circuit board (31) arranged on the side wall (101) through the wiring harness (332);

The bracket (10) comprises a plurality of limiting portions (14), wherein the limiting portions (14) are arranged on a side of the bracket body (11) away from the first direction (Y), and at least a portion of the wiring harness (332) is embedded in the limiting portions (14).
The battery information acquisition assembly according to claim 6, wherein a colloid is provided between the limiting portion (14) and the wiring harness (332).
The battery information acquisition component according to claim 6, wherein the bracket body (11) comprises a plurality of second openings (112), the second openings (112) penetrate the bracket body (11) along the first direction (Y), and the temperature sensing component (331) is embedded in the second opening (112).
According to the battery information acquisition component of claim 6, the temperature sensing component (331) includes a shell (3311), a water drop head temperature sensing element and a back glue (3312), the shell (3311) and the back glue (3312) are surrounded to form a accommodating space, and the water drop head temperature sensing element is arranged in the accommodating space.
According to the battery information acquisition component of claim 6, wherein the temperature acquisition unit (33) further comprises a limit frame (333), and the limit frame (333) is arranged at the connection between the flexible circuit board (31) and the wiring harness (332).
A battery module, comprising a battery information acquisition component and a battery cell (40) group as claimed in any one of claims 1 to 10, wherein the battery cell (40) group comprises a plurality of battery cells (40), a bracket (10) and a busbar (20) in the battery information acquisition component are sequentially stacked on the battery cell (40) group along a first direction (Y), the battery cell (40) comprises a positive electrode (41) and a negative electrode (42), and a welding portion (201) in the busbar (20) is fixedly connected to the positive electrode (41) or the negative electrode (42) of the battery cell (40).
The battery module according to claim 11, wherein the bracket (10) comprises:

A bracket body (11), wherein the busbar (20) is arranged on a side of the bracket body (11) facing the first direction (Y);

a support plate (12), arranged on a side of the support body (11) away from the first direction (Y) and located at an edge of the support body (11);

an assembly guide structure (13), which is arranged on a side of the bracket body (11) away from the first direction (Y) and is fixedly connected to the bracket body (11) and the support plate (12) respectively;

The assembly guide structure (13) is provided with a contoured surface matching at least a portion of the side wall (101) of the battery core (40).