CN116864925A

CN116864925A - Battery collection connecting assembly, battery module and battery pack

Info

Publication number: CN116864925A
Application number: CN202310835127.4A
Authority: CN
Inventors: 李东军
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2023-07-07
Filing date: 2023-07-07
Publication date: 2023-10-10

Abstract

The application discloses a battery collecting and connecting assembly, a battery module and a battery pack, wherein the battery collecting and connecting assembly comprises a tray, a first busbar unit, an insulating part, a hot-pressing film and a flexible circuit board, the first busbar unit comprises a plurality of busbars which are arranged at intervals along the length direction of the tray, the insulating part is positioned in the first busbar unit, the insulating part is arranged between two adjacent busbars along the length direction of the tray, so that the two adjacent busbars along the first busbar unit are insulated, the tray, the first busbar unit and the insulating part are integrally wrapped by the hot-pressing film, the flexible circuit board is arranged on the hot-pressing film, and each group of first busbar unit is correspondingly provided with one flexible circuit board. According to the application, the insulating piece is arranged between two adjacent buses in the first bus unit, so that the short circuit caused by direct contact of the two adjacent buses can be avoided, and the safety and reliability of the battery pack are improved.

Description

Battery collection connecting assembly, battery module and battery pack

Technical Field

The application relates to the technical field of energy storage, in particular to a battery collection and connection assembly, a battery module and a battery pack.

Background

The CCS (Cells Contact System) collecting integrated component is configured in the battery pack and is used for collecting the temperature and/or voltage of the plurality of battery cells and monitoring the states of the plurality of battery cells in the battery pack. The multiple electric cores are connected through the bus bars, so that conductive connection between the electric cores is realized. In the battery pack structure, the busbar and the CCS component are generally disposed above the battery cells, but because the busbar and the CCS component are separately disposed, the process is relatively complex and the efficiency is relatively low when the battery pack is assembled.

Therefore, in order to improve the assembly efficiency of the battery pack, the CCS assembly and the bus bar are generally integrated, but because the interval between the battery cells is relatively close, and the CCS assembly is integrated, short circuit is easy to occur between adjacent bus bars, and there is an electrical safety hazard.

Disclosure of Invention

The embodiment of the application mainly aims to provide a battery acquisition connection assembly, a battery module and a battery pack, and aims to solve the technical problem that short circuit is easy to occur between buses due to the fact that the battery cells are close in distance in the battery pack in the prior art.

An embodiment of the present application proposes a battery acquisition connection assembly including:

at least one group of first bus bar units, wherein the first bus bar units comprise a plurality of bus bars, and the bus bars are arranged on the surface of the tray and are arranged at intervals along the length direction of the tray;

the insulating piece is positioned in the first busbar unit and connected with the tray, and is arranged between two adjacent busbars along the length direction of the tray, so that the two busbars on two sides of the insulating piece are insulated;

a hot press film configured to integrally wrap the tray, the first busbar unit, and the insulator;

the flexible circuit board is arranged on the hot-pressing film, each group of first busbar units is correspondingly provided with a flexible circuit board, and each flexible circuit board is connected with all the busbars in the same first busbar unit and is positioned on one side of the first busbar unit.

In some embodiments of the present application, the battery collecting and connecting assembly has two sets of the first busbar units, and the two sets of the first busbar units are adjacently disposed in the middle of the tray, where a plurality of the busbars in one set of the first busbar units are aligned with a plurality of the busbars in the other set of the first busbar units, and the insulating members in one set of the first busbar units are aligned with the insulating members in the other set of the first busbar units.

In some embodiments of the present application, two insulating members corresponding to positions in two adjacent first busbar units are integrally formed.

In some embodiments of the present application, the integrated structure includes a first separator and two second separators, where the first separator and the two second separators are connected in an "i" shape, the first separator is disposed between two adjacent bus bars, and the second separator is disposed on a side of the bus bars near the flexible circuit board.

In some embodiments of the present application, the bus bar surface in the first bus bar unit is sunk on the surface of the tray, and cooperates with the tray to form a groove structure, and the groove structure is used for plugging with a battery terminal.

In some embodiments of the present application, the battery collecting and connecting assembly further includes at least one set of second busbar units, the second busbar units are disposed at intervals from the first busbar units, the second busbar units are disposed outside the tray and connected with the tray, and the thermal pressing film integrally wraps the tray, the first busbar units, the second busbar units, and the insulating member.

In some embodiments of the present application, the tray is provided with an explosion-proof valve hole array, the explosion-proof valve hole array includes a plurality of explosion-proof valve holes that are spaced along the length direction of the tray, and a first buckle is provided in a tray area between adjacent explosion-proof valve holes in the explosion-proof valve hole array, and the first buckle is used for being clamped with the explosion-proof valve mounted on the explosion-proof valve hole.

In some embodiments of the present application, a reinforcing plate is disposed on one side of the tray, a portion of the flexible circuit board extends onto the reinforcing plate, and the battery collection connection assembly further includes a connector disposed on the reinforcing plate and electrically connected to the flexible circuit board, the connector being configured to be connected to an external control device.

In some embodiments of the present application, there is also provided a battery module including:

a plurality of electrical cores;

the battery collection connecting assembly is characterized in that each busbar on the battery collection connecting assembly is used for electrically connecting two adjacent electric cores.

In some embodiments of the present application, the present application further provides a battery pack including the above battery module.

The embodiment of the application provides a battery collecting and connecting assembly, a battery module and a battery pack, wherein in each group of first busbar units on a tray, an insulating piece is arranged between every two adjacent busbars to separate the first busbar units from each other, so that the two adjacent busbars are insulated, and the short circuit caused by direct contact of the two adjacent busbars can be avoided, so that the safety and the reliability of the battery pack are improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view (top view) of a battery collection assembly according to an embodiment of the present application;

FIG. 2 is a schematic view (oblique view) of a battery acquisition assembly according to an embodiment of the present application;

FIG. 3 is a schematic view of an insulator according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a connection structure between a reinforcing board and a flexible circuit board according to an embodiment of the present application;

FIG. 5 is a schematic view illustrating a sinking structure of a bus bar and a tray of a first bus bar unit according to an embodiment of the application;

fig. 6 is a schematic diagram illustrating a positional relationship between an explosion valve hole and a first buckle in an embodiment of the present application.

Reference numerals: 10. a battery collection connection assembly; 11. a tray; 12. a first bus unit; 13. a second bus unit; 14. a flexible circuit board; 15. an explosion-proof valve hole array; 16. hot pressing the film; 17. a reinforcing plate; 18. a connector; 100. a busbar; 200. an explosion-proof valve hole; 201. a first buckle; 300. an insulating member; 301. a first separator; 302. and a second separator.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present application, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.

As shown in fig. 1 to 6, the present application provides a battery collection connection assembly 10 including a tray 11, at least one set of first busbar units 12, an insulating member 300, a thermo-compression film 16, and a flexible wiring board 14. The first bus bar unit 12 includes a plurality of bus bars 100, and the bus bars 100 are disposed on the surface of the tray 11 and are spaced apart along the length direction of the tray 11. The insulating member 300 is disposed in the first bus bar unit 12 and connected to the tray, and the insulating member 300 is disposed between two adjacent bus bars 100 along the length direction of the tray 11 to insulate the two adjacent bus bars 100 on both sides of the insulating member 300. The thermo-compression film 16 is configured to integrally wrap the tray 11, the first busbar unit 12, and the insulator 300. The flexible circuit boards 14 are disposed on the thermo-compression film 16, and each set of first busbar units 12 is correspondingly provided with one flexible circuit board 14, and each flexible circuit board 14 is connected with all the busbars 100 in the same first busbar unit 12 and is located at one side of the first busbar unit 12.

In some embodiments, each of the first busbar units 12 includes a plurality of busbars 100 disposed on the tray 11 at intervals along the length direction of the tray 11, and the busbars 100 are used for connecting with the battery poles, and each of the busbars 100 is correspondingly connected with one battery cell.

Specifically, the battery collecting and connecting assembly includes a plurality of insulating members 300, wherein the plurality of insulating members 300 are located in the first busbar unit 12, each insulating member 300 is disposed between two adjacent busbars 100 in the same first busbar unit 12, and in each group of first busbar units 12, one insulating member 300 is disposed between each two adjacent busbars 100, so as to ensure that the two adjacent busbars 100 are not in contact with each other, thereby avoiding short-circuiting of the busbars 100 in the first busbar units 12 due to mutual contact.

Generally, only one row of bus bars 100 is disposed in the first bus bar unit 12, i.e., the plurality of bus bars 100 are distributed at intervals in the row of bus bars 100, and may be equally distributed or non-equally distributed.

After the bus bars 100 and the insulating members 300 on the tray 11 are disposed, the thermo-compression film 16 wraps the surface of the tray 11, all the bus bars 100 on the tray 11, and all the insulating members 300 on the tray 11, so that the flexible circuit board 14 is disposed conveniently.

The tray 11 of the present application is generally made of plastic material, which has good insulation and plasticity.

Compared with the prior art, the battery collection and connection assembly only independently takes the plastic tray or the hot-pressing film as the bearing structure of the ccs assembly, the bus bar 100 is arranged on the plastic tray 11, the bus bar 100 and the tray 12 are fully covered and wrapped through the hot-pressing film 16 to form an integrated structure, the flexible circuit board 14 is arranged on the hot-pressing film 16, and meanwhile, the bus bar and the collection wiring harness are integrated on the bearing structure, so that the integration degree is high, and the integral structural performance of the battery pack can be improved. Meanwhile, the battery collection connecting assembly has certain structural strength, and compared with a plastic tray, the battery collection connecting assembly is lighter in structural weight and can improve the lightweight characteristic of a battery pack.

Similarly, a plurality of flexible circuit boards 14 are disposed on the tray 11, and each of the first busbar units 12 is correspondingly connected with one flexible circuit board 14, and each of the flexible circuit boards 14 is disposed on the hot pressing film 16.

It can be understood that, the insulating member 300 is disposed between every two adjacent bus bars 100 in each group of the first bus bar units 12 of the battery collecting and connecting assembly 10, so as to separate two adjacent bus bars 100 in the same first bus bar unit 12, so that when the electric cores in the battery pack are densely arranged, the adjacent bus bars 100 can be prevented from contacting each other to form a short circuit, thereby improving the safety and stability of the battery pack.

It should be noted that, each row of bus bars 100 on the tray 11 is correspondingly provided with a flexible circuit board 14, and the flexible circuit board 14 is typically disposed on the thermo-compression film 16 by gluing.

It should be noted that, generally, the insulating member 300 is a plastic member.

In some embodiments, the first busbar unit 12 in the battery collection assembly is disposed in the middle of the tray 11.

In some embodiments, the battery collection assembly has two sets of first bus bar units 12, where the two sets of first bus bar units 12 are disposed adjacent to each other and located in the middle of the tray 11, and the two sets of first bus bar units 12, where the plurality of bus bars 100 in one set of first bus bar units 12 are aligned with the plurality of bus bars in the other set of first bus bar units 12; wherein the insulators 300 of one set of first bus units 12 are aligned with the insulators 300 of another set of first bus units 12.

It should be noted that, regarding the "one-to-one alignment arrangement" of the bus bars 100, that is, the position of each bus bar 100 in one set of the first bus bar units 12 is the same as the position of each bus bar 100 in the other set of the first bus bar units 12 in the width direction of the tray 11.

Also, "one-to-one alignment" with respect to the insulators 300, that is, the positions of the insulators in one group of the first bus bar regions 12 and the insulators 300 in the other group of the first bus bar units 12 in the width direction of the tray 11 are the same.

In some embodiments, in two adjacent first bus units 12, two buses 100 disposed in alignment are also adjacent to each other.

In some embodiments, two insulators 300 are aligned in two adjacent first busbar units 12.

In some embodiments, a plurality of insulating members 300 are disposed in each group of the first busbar units 12, each insulating member 300 is disposed between two adjacent busbars 100 disposed at intervals along the length direction of the tray, and two insulating members 300 disposed in alignment in two adjacent first busbar units 12 are integrally formed.

It will be appreciated that by forming two insulators 300 as a new insulator 300 to separate four bus bars 100, two bus bars 100 are provided on one side of the new insulator 300 and two bus bars 100 are provided on the other side, with the two bus bars 100 on the same side being located in two different and adjacent first bus bar units 12, respectively.

That is, by replacing two insulators 300 originally provided in two different first busbar units 12 with one longer insulator 300, the number of parts on the battery collection connection assembly 10 is reduced, and the assembly efficiency of the battery collection connection assembly 10 is improved.

In some embodiments, the above-mentioned integrated structure includes a first separator 301 and two second separators 302, where the first separator 301 and the two second separators 302 are connected in an "i" shape, the first separator 301 is disposed between two adjacent bus bars 100, and the second separator 302 is disposed on a side of the bus bars 100 near the flexible circuit board 14.

It will be appreciated that the "i" shaped integrated structure is specifically that the first partition 301 is disposed along a direction perpendicular to the length direction of the tray 11, and two second partitions 302 are respectively connected to two ends of the first partition 301, and the two second partitions 302 are disposed along the length direction of the tray 11, so as to separate two adjacent bus bars 100 along the length direction of the tray 11, and prevent the bus bars from contacting each other to generate a short circuit.

In some embodiments, two second partitions 302 of the i-shaped integrated structure are respectively located on one side of the bus bar 100 away from the other first bus bar unit 12, and the projection of the second partitions 302 in the width direction of the tray 11 completely shields the bus bar 100 adjacent to the first partition 301.

In some embodiments, the unitary structure may also be provided with only the first separator 301.

In some embodiments, in two adjacent first busbar units 12, a plurality of insulating members 300 are disposed in each first busbar unit 12, each insulating member 300 is disposed between two adjacent busbars 100 disposed at intervals along the length direction of the tray, and the plurality of insulating members 300 in the two adjacent first busbar units 12 are connected into an integral structure, that is, the plurality of insulating members 300 form a grid structure, and separate the plurality of busbars 100 disposed at intervals.

In some embodiments, the surface of the bus bar 100 in the first bus bar unit 12 is sunk on the surface of the tray 11, and the bus bar 100 cooperates with the tray 11 to form a groove structure for mating with the battery terminal.

Wherein the surface of the bus bar 100 is sunk on the surface of the tray 11, i.e., the surface of the bus bar 100 is lower than the surface of the tray 11, thereby forming a groove structure in cooperation with the tray 11.

In some embodiments, the groove structure has a depth of 0.5mm to 1.5mm.

In some embodiments, the groove structure is a rectangular groove, and a preset distance is arranged between the side wall of the rectangular groove and the side wall of the battery cell pole, wherein the preset distance is 1mm-3mm. That is, the rectangular groove is slightly larger than the battery core electrode post, so that the battery core electrode post is convenient to be inserted into the groove structure.

It can be understood that through setting up groove structure, can realize grafting effect with electric core utmost point post, can fix a position battery fast and gather coupling assembling and electric core module to improve the assembly efficiency between battery collection coupling assembling and the electric core module, and then improve the assembly efficiency of battery package.

Meanwhile, by setting the bus bars 100 in the first bus bar unit 12 such that the surface of the bus bars 100 is lower than the surface of the tray 11, a groove structure is formed, which can play a role in positioning the hot-pressed film 16, facilitating rapid positioning of the hot-pressed film 16.

In some embodiments, the battery collecting and connecting assembly 10 further includes at least one set of second busbar units 13, the second busbar units 13 are disposed at intervals from the first busbar units 12, the second busbar units 13 are disposed outside the tray 11 and connected with the tray 12, and the thermal compression film 16 integrally wraps the tray 11, the first busbar units 12, the second busbar units 13, and the insulating member 300.

Specifically, the second busbar unit 13 includes a plurality of busbars 100 that set up along tray 11 length direction interval, and second busbar unit 13 and first busbar unit 12 interval set up, and every second busbar unit 13 all corresponds and is provided with a flexible line way board 14, and the circuit board sets up in one side of second busbar unit 13, and all busbars 100 in the second busbar unit 13 all are connected with the flexible line way board 14 that corresponds the setting.

Specifically, each of the bus bars 100 in the second bus bar unit 13 is individually connected to the tray 11. That is, one end of the bus bar 100 in the second bus bar unit 13 is connected to the tray 11, and the other end thereof is disposed away from the tray 11.

In some embodiments, the first busbar unit 12 is located in the middle of the tray 11 and the second busbar unit 13 is located outside the tray 11.

In some embodiments, the tray 11 has two first bus bar units 12 and two second bus bar units 13, the two first bus bar units 12 are adjacently disposed in the middle of the tray 11, the two second bus bar units 13 are respectively disposed on two sides of the two first bus bar units 12, and the two first bus bar units 12 and the two second bus bar units 13 are respectively and correspondingly provided with a flexible circuit board 14. That is, there are one second bus bar unit 13, one flexible wiring board 14, one first bus bar unit 12, one flexible wiring board 14, and one second bus bar unit 13 in this order along the width direction of the tray 11, wherein two first bus bar units 12 located in the middle are disposed next to each other.

In some embodiments, the tray 11 is provided with an explosion valve hole array 15, where the explosion valve hole array 15 includes a plurality of explosion valve holes 200 spaced along the length of the tray 11, and a first buckle 201 is provided in the area of the tray 11 between adjacent explosion valve holes 200 in the explosion valve hole array 15, where the first buckle 201 is configured to be engaged with an explosion valve mounted to the explosion valve hole 200.

In some embodiments, the first clasp 201 is a clasp with a hexagonal base. The hexagonal base of which has the same wall thickness as the ribs of the explosion-proof valve to be mounted on the tray 11.

It can be understood that the buckle provided with the hexagonal base is equivalent to the arrangement of the reinforcing ribs at the explosion-proof valve opening on the tray 11, so that the structural strength of the explosion-proof valve opening on the tray 11 can be enhanced.

In some embodiments, the tray 11 has two rows 15 of explosion valve openings. Specifically, there are one second busbar unit 13, one flexible wiring board 14, one explosion-proof valve hole row 15, one flexible wiring board 14, one first busbar unit 12, one flexible wiring board 14, one explosion-proof valve hole row 15, one flexible wiring board 14, and one second busbar unit 13 in this order along the width direction of the tray 11.

In some embodiments, the end of the tray 11 is provided with a stiffener 17, a portion of the flexible circuit board 14 extends onto the stiffener 17, and the battery collection connection assembly 10 further includes a connector 18, the connector 18 being located on the stiffener 17 and electrically connected to the flexible circuit board 14, the connector 18 being for connection to an external control device.

It should be noted that, the connectors 18 are generally connected to the flexible circuit boards 14 through pins, and each flexible circuit board 14 is connected to one connector 18.

In some embodiments, there is one second busbar unit 13, one first flexible wiring board, one explosion-proof valve hole row 15, one second flexible wiring board, one first busbar unit 12, one third flexible wiring board, one explosion-proof valve hole row 15, one fourth flexible wiring board, and one second busbar unit 13 in this order along the width direction of the tray 11. Wherein, the end of tray 11 has first reinforcing plate and second reinforcing plate, and first reinforcing plate is close to first flexible wiring board and second flexible wiring board setting, and the second reinforcing plate is close to third flexible wiring board and fourth flexible wiring board setting. The end parts of the first flexible circuit board and the second flexible circuit board are respectively arranged on the first reinforcing plate in an extending mode, and the end parts of the third flexible circuit board and the fourth flexible circuit board are respectively arranged on the second reinforcing plate in an extending mode. The first reinforcing plate is provided with a first connector connected with the first flexible circuit board and a second connector connected with the second flexible circuit board, and the second reinforcing plate is provided with a third connector connected with the third flexible circuit board and a fourth connector connected with the fourth flexible circuit board.

In some embodiments, the stiffener plates 17 are all epoxy plates.

In some embodiments, the end of the tray 11 has an extension on which the reinforcing plate 17 is disposed, the extension being for carrying the reinforcing plate 17. Wherein, be provided with first reference column and second reference column on the extension, be provided with on the reinforcing plate 17 with first reference column mating connection's first locating hole, with second reference column mating connection's second locating hole.

Generally, the first positioning column and the second positioning column are both cylinders, the first positioning hole is a round hole, the second positioning column is a waist-shaped hole, and it can be understood that the waist-shaped hole is larger than the round hole in size, so that the condition that the installation is difficult due to insufficient structural precision can be avoided.

In some embodiments, the length direction of the kidney-shaped aperture is the direction of the line connecting the aperture center of the kidney-shaped aperture with the aperture center of the circular aperture.

In some embodiments, the present application further provides a battery module, including a plurality of battery cells and the battery collecting and connecting assembly 10 described above, where each busbar 100 on the battery collecting and connecting assembly 10 is used to connect two adjacent battery cells.

That is, each busbar 100 connects two poles that are respectively located on two adjacent cells.

Because the battery module adopts the battery collecting and connecting assembly 10 in the above embodiment, the battery module has at least some or all of the beneficial effects of the battery collecting assembly in the above embodiment, and will not be described in detail herein.

In some embodiments, the application further provides a battery pack, which comprises the battery module.

Because the battery pack adopts the battery module in the above embodiment, and the battery module adopts the battery collecting and connecting assembly 10, the battery pack has at least some or all of the beneficial effects of the battery collecting assembly in the above embodiment, and will not be described in detail herein.

In some embodiments, the battery pack comprises a chassis, a cover plate and the battery module, wherein the cover plate is covered on the chassis and matched with the chassis to form a containing cavity, and the battery module is arranged in the containing cavity to form the battery pack.

The foregoing description is only of the optional embodiments of the present application, and is not intended to limit the scope of the application, and all the equivalent structural changes made by the description of the present application and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the application.

Claims

1. A battery harvesting connection assembly, comprising:

a tray;

2. The battery harvesting connection assembly of claim 1, wherein the battery harvesting connection assembly has two sets of the first busbar units, the two sets of the first busbar units being adjacently disposed in a middle portion of the tray, wherein a plurality of the busbars in one set of the first busbar units are disposed in one-to-one alignment with a plurality of the busbars in the other set of the first busbar units, and wherein the insulating members in one set of the first busbar units are disposed in one-to-one alignment with the insulating members in the other set of the first busbar units.

3. The battery harvesting connection assembly of claim 2, wherein two of the insulators corresponding in position in two adjacent first busbar units are of unitary construction.

4. The battery harvesting connection assembly of claim 3, wherein the integral structure comprises a first separator and two second separators, the first separator and the two second separators are connected in an "i" shape, the first separator is disposed between two adjacent bus bars, and the second separator is disposed on a side of the bus bars adjacent to the flexible circuit board.

5. The battery harvesting connection assembly of claim 1, wherein the buss bar surface in the first buss bar unit is recessed from the surface of the tray and cooperates with the tray to form a groove structure for mating with a battery post.

6. The battery harvesting connection assembly of claim 1, further comprising at least one set of second busbar units disposed in spaced relation to the first busbar units, the second busbar units disposed outside of the tray and connected to the tray, the hot-pressed film integrally wrapping the tray, the first busbar units, the second busbar units, and the insulating member.

7. The battery harvesting connection assembly of any one of claims 1-6, wherein the tray is provided with an array of explosion vent openings, the array of explosion vent openings including an array of a plurality of explosion vent openings spaced apart along the length of the tray, a tray region between adjacent ones of the array of explosion vent openings being provided with a first catch for snap-engagement with an explosion vent mounted to the explosion vent openings.

8. The battery harvesting connection assembly of any of claims 1-6, wherein the end of the tray is provided with a stiffener plate, a portion of the flexible circuit board extends onto the stiffener plate, the battery harvesting connection assembly further comprising a connector on the stiffener plate and electrically connected to the flexible circuit board, the connector for connection to an external control device.

9. A battery module, comprising:

a plurality of electrical cores;

the battery collection assembly of any one of claims 1-8, each of the buss bars on the battery collection assembly being configured to electrically connect two adjacent electrical cells.

10. A battery pack comprising the battery module of claim 9.