CN115621651A - Power battery module and power battery pack - Google Patents

Abstract

The invention discloses a power battery module and a power battery pack, which belong to the technical field of power batteries. The power battery module includes a tray, a bracket and a connector. The tray is provided with a tray accommodating cavity, and the side of the tray is provided with a tray flange; the bracket is provided with a bracket accommodating cavity, and the side of the bracket is provided with a bracket flange, and the bracket flange is connected to the The tray flanges are connected in one-to-one correspondence, so that the tray accommodating cavity and the bracket accommodating cavity are combined to form a cell clamping and fixing cavity; the correspondingly connected bracket flanges and the tray flanges pass through the Connectors connect. The invention improves the assembly efficiency of the power battery module and reduces the assembly cost.

Description

Power battery module and power battery pack

technical field

The invention relates to the technical field of power batteries, in particular to a power battery module and a power battery pack.

Background technique

As an electric energy storage unit, the battery cell is the smallest unit of a power battery.

When multiple batteries are packaged together by the same shell frame and communicate with the outside through a unified boundary, this forms a power battery module. When several power battery modules are jointly controlled or managed by the BMS and the thermal management system, the unified whole is the power battery.

In the prior art, a power battery module includes a bottom tray, a cell disposed inside the bottom tray, and a CCS assembly disposed on the top of the cell. In order to ensure the structural strength of the power battery module, an adhesive layer is generally glued between the bottom tray and the battery cell to ensure the structural strength between the battery cell and the bottom tray; the bracket of the CCS component is also glued to the top of the battery cell There is an adhesive layer to ensure a stable connection between the bracket of the CCS component and the battery cell.

The above-mentioned adhesive layers are all formed by gluing. However, the current industrialization efficiency of the gluing process is low, and the time required for the glue to cure is relatively long, which leads to low assembly efficiency of the power battery module.

Contents of the invention

The purpose of the present invention is to provide a power battery module and a power battery pack to solve the problem of low assembly efficiency of the power battery module caused by the need for gluing when assembling the power battery module in the prior art. technical problem.

As above design, the technical solution adopted in the present invention is:

Power battery module, including:

A tray, the tray is provided with a tray accommodating cavity, and the side of the tray is provided with a tray flange;

A bracket, the bracket is provided with a bracket accommodating cavity, and the side of the bracket is provided with a bracket flange, and the bracket flange is connected to the tray flange in one-to-one correspondence, so that the tray accommodating cavity and the tray The accommodating cavities of the brackets are combined to form a cell clamping and fixing cavity;

A connecting piece, the correspondingly connected flange of the bracket is connected with the flange of the tray through the connecting piece.

Optionally, one of the tray flange and the bracket flange is provided with a mounting positioning member, and the other is provided with a mounting positioning hole that cooperates with the mounting positioning member.

Optionally, the connecting piece includes a plug-in piece, and the plug-in piece includes a limit cap and an insertion shaft connected to the limit cap, and the insertion shaft can pass through the flange of the bracket and the The flange of the tray, the limit cap can abut against the flange of the bracket.

Optionally, the connector further includes a nut, the plug-in shaft is provided with external threads, and the nut can be locked on the plug-in shaft.

Optionally, the tray is provided with cell pressure relief holes communicating with the tray accommodating cavity, and the cell pressure relief holes are provided in a one-to-one correspondence with the cells.

Optionally, in the tray accommodating cavity, a tray cell positioning guide structure is provided along the circumference of the cell pressure relief hole.

Optionally, in the bracket accommodating cavity, the bracket is provided with a bracket battery positioning structure, and the bracket battery positioning structure is in one-to-one correspondence with the tray battery positioning guide structure, so that the same Cell positioning.

Optionally, the battery cell positioning and guiding structure of the tray includes several battery cell positioning and guiding blocks distributed at intervals along the circumference of the battery cell pressure relief hole.

Optionally, the bracket is provided with battery positive pole installation holes corresponding to the battery cells one by one, and the battery core positioning structure of the bracket includes several brackets arranged at intervals along the circumference of the battery positive pole installation holes Cell positioning block.

Optionally, projected along the axial direction of the battery positive electrode installation hole, the projection of one of the bracket battery positioning blocks of the bracket battery positioning structure is located at the Between two adjacent tray cell positioning guide blocks of the tray cell positioning guide structure.

Optionally, on the surface of the tray away from the tray accommodating cavity, a tray reinforcing support structure is provided along the circumference of the cell pressure relief hole.

Optionally, the tray reinforcement support structure includes a tray reinforcement support block protruding from the surface of the tray away from the tray accommodating cavity, and reinforcement ribs are provided around the circumference of the tray reinforcement support block.

Optionally, the power battery module further includes a CCS component, and the CCS component includes:

a bus bar integrated into the bracket;

The collection wire harness is connected with the bus bar and integrated into the bracket, and the collection wire harness is electrically connected with the bus bar.

Optionally, the power battery module further includes a cell assembly, the cell assembly includes several cells, and the negative electrode of each cell is clamped and installed in the cell clamping and fixing cavity.

The power battery pack includes a case body and the above-mentioned power battery module, and the power battery module is placed in the case body.

Optionally, the box body includes a side beam, and the side beam, the bracket flange and the pallet flange are connected and fixed through the connecting piece.

Beneficial effects of the present invention:

When the power battery module proposed by the present invention is assembled, the tray is placed on the assembly station, the tray accommodating cavity is set upward, the lower end of the battery cell of the power battery module is placed in the tray accommodating cavity, and then the bracket The accommodating cavity faces downward, so that the tray accommodating cavity and the bracket accommodating cavity are combined to form a cell clamping and fixing cavity. Corresponding and connected by connectors. At this point, the assembly of the power battery module is completed. Since the flanges of the bracket correspond to the flanges of the tray and are connected through connectors, it is ensured that the cell clamping and fixing cavity formed by the combination of the tray accommodation cavity and the bracket accommodation cavity can hold the battery cells. Clamping eliminates the need for gluing operations, improving production efficiency and reducing production costs.

The power battery pack proposed by the present invention includes the above-mentioned power battery module, and its assembly is fast and convenient.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained according to the content of the embodiment of the present invention and these drawings without any creative effort.

Fig. 1 is a schematic structural diagram of a power battery module provided by Embodiment 1 of the present invention;

Fig. 2 is the enlarged view of place A in Fig. 1;

Fig. 3 is a schematic diagram of an exploded structure of a power battery module provided in Embodiment 1 of the present invention;

Fig. 4 is a structural schematic diagram of the first viewing angle of the tray provided by Embodiment 1 of the present invention;

Fig. 5 is the enlarged view of place B in Fig. 4;

Fig. 6 is a schematic structural view of the second viewing angle of the tray provided by Embodiment 1 of the present invention;

Figure 7 is an enlarged view at C in Figure 6;

Fig. 8 is a schematic structural diagram of a bracket provided by Embodiment 1 of the present invention;

Fig. 9 is an enlarged view at D in Fig. 8;

Fig. 10 is a schematic structural diagram of a first viewing angle of a CCS module provided by Embodiment 1 of the present invention;

Fig. 11 is a schematic structural diagram of the CCS module provided by Embodiment 1 of the present invention from a second viewing angle.

In the picture:

1. Tray; 11. Tray accommodation cavity; 12. Tray flanging; 121. Installation positioning piece; 13. Cell pressure relief hole; 14. Tray cell positioning guide structure; 141. Tray cell positioning guide block; 15 . Pallet reinforced support structure; 151. Pallet reinforced support block;

2. Bracket; 21. Bracket accommodating cavity; 22. Bracket flanging; 221. Installation positioning hole; 23. Bracket battery positioning structure; 231. Bracket battery positioning block; 24. Battery positive pole installation hole;

3. Connector; 31. Connector; 311. Limit cap; 312. Plug shaft;

4. Cell components; 41. Cells;

51. Bus bar; 52. Collection wiring harness.

detailed description

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings but not all of them.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance. Wherein, the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Embodiment one

Referring to Fig. 1-Fig. 11, this embodiment provides a power battery module, which can be quickly assembled and has good structural strength.

Specifically, referring to FIG. 1 and FIG. 2 , in this embodiment, the power battery module includes a tray, a bracket 2 and a connector 3 .

The tray 1 is provided with a tray accommodating cavity 11 , and the side of the tray 1 is provided with a tray flange 12 . Specifically, the tray 1 includes a tray bottom plate and a tray side plate disposed on a side of the tray bottom plate, and each tray side plate is provided with a tray flange 12 at an end away from the tray bottom plate.

The bracket 2 is provided with a bracket accommodation chamber 21, and the side of the bracket 2 is provided with a bracket flange 22, and the bracket flange 22 is connected with the tray flange 12 in one-to-one correspondence, so that the tray accommodation chamber 11 and the bracket accommodation chamber 21 are paired. combined to form a cell clamping and fixing cavity. Specifically, the support 2 includes a support top plate, two long sides of the support top plate are provided with support side plates, and the end of each support side plate away from the support top plate is provided with a support flange 22 .

The correspondingly connected bracket flange 22 is connected with the pallet flange 12 through the connecting piece 3 .

When assembling the power battery module provided in this embodiment, the tray 1 is placed at the assembly station, the tray accommodating cavity 11 is set upward, and the lower end of the battery cell 41 of the power battery module is placed in the tray accommodating cavity 11 , and then, the bracket accommodating cavity 21 faces downward, so that the tray accommodating cavity 11 and the bracket accommodating cavity 21 are combined to form a cell clamping and fixing cavity, and the cell clamping and fixing cavity clamps the cell 41 therein, The bracket flanges 22 correspond to the pallet flanges 12 one by one and are connected through the connecting piece 3 . So far, the assembly of the power battery module is completed. Since the bracket flange 22 is in one-to-one correspondence with the tray flange 12 and is connected through the connector 3, it is ensured that the battery cell formed by the combination of the tray accommodation cavity 11 and the bracket accommodation cavity 21 is clamped and fixed. The cavity can clamp the electric core 41 without further glue-making operation, which improves the production efficiency and reduces the production cost.

Specifically, in this embodiment, the power battery module further includes a battery cell assembly 4, and the battery cell assembly 4 includes several battery cells 41, and the negative electrode of each battery cell 41 is clamped and installed in the cell clamping and fixing cavity.

Specifically, several battery cells 41 are arranged in an array to form the battery cell assembly 4 .

The lower surface of the negative electrode of the battery cell 41 abuts against the inner side of the bottom plate of the tray, and the upper surface of the negative electrode of the battery cell 41 abuts against the inner side of the support top plate.

Further, referring to FIG. 8 and FIG. 9 , the bracket 2 is provided with battery positive installation holes 24 corresponding to the battery cells 41 one-to-one, and the positive column of the battery cell 41 can pass through the battery positive pole installation holes 24 .

Specifically, the battery positive electrode installation hole 24 is provided on the top plate of the bracket.

Further, referring to FIG. 2 , FIG. 3 and FIG. 8 , in this embodiment, one of the tray flange 12 and the bracket flange 22 is provided with a mounting locator 121 , and the other is provided with a Install the positioning hole 221. The setting of the installation positioning member 121 and the installation positioning hole 221 ensures that the tray accommodating cavity 11 and the bracket accommodating cavity 21 are aligned accurately.

Specifically, in this embodiment, the tray flange 12 is provided with an installation positioning member 121 , and the bracket flange 22 is provided with an installation positioning hole 221 .

Specifically, referring to FIG. 2 , in this embodiment, the connecting piece 3 includes a plug-in piece 31, and the plug-in piece 31 includes a limit cap 311 and an insertion shaft 312 connected with the limit cap 311, and the insertion shaft 312 can pass through in turn. Through the bracket flange 22 and the tray flange 12 , the limit cap 311 can abut against the bracket flange 22 .

Further, the connecting member 3 further includes a nut, the plug shaft 312 is provided with external threads, and the nut can be locked on the plug shaft 312 .

Specifically, both the bracket flange 22 and the tray flange 12 are provided with connecting piece through holes, and the connecting piece through holes on the bracket flange 22 correspond to the connecting piece through holes on the tray flange 12 one by one.

When the tray accommodating cavity 11 and the bracket accommodating cavity 21 are aligned, the installation positioning member 121 is inserted into the installation positioning hole 221, and after the connector 3 passes through the bracket flange 22 and the tray flange 12, the limit cap 311 and the bracket are flipped over. The sides 22 abut.

Further, the power battery module is locked on the side beam of the power battery box. Locking holes corresponding to the insertion shafts 312 are provided on the side beams of the box body. After inserting the shaft 312 through the bracket flange 22 and the tray flange 12 in turn, insert it into the locking hole on the side beam. The lower surface of the power battery is abutted against, so that the power battery module is locked on the side beam of the power battery box.

Further, referring to Fig. 4-Fig. 7, in this embodiment, the tray 1 plays the role of carrying and installing the cell assembly 4, on which is provided a cell pressure relief hole 13 communicating with the tray accommodating cavity 11, the cell The pressure relief holes 13 are provided in one-to-one correspondence with the battery cells 41 .

Specifically, the cell pressure relief hole 13 is disposed on the bottom plate of the tray, and the inner diameter of the cell pressure relief hole 13 is smaller than the diameter of the cell 41 .

Specifically, referring to Fig. 4 and Fig. 5, on the surface of the tray 1 away from the tray accommodating cavity 11, a tray reinforcing support structure 15 is provided along the circumference of the cell pressure relief hole 13, thereby avoiding opening several cell pressure relief holes 13 affects the structural strength of the tray 1 itself, and at the same time, the tray reinforced support structure 15 can also provide support for the power battery module to ensure the overall structural strength of the power battery module.

Specifically, referring to FIG. 5 , in this embodiment, the tray reinforcement support structure 15 includes a tray reinforcement support block 151 protruding from the surface of the tray 1 away from the tray accommodating cavity 11, and the tray reinforcement support block 151 is provided with reinforcing ribs in the circumferential direction. .

The tray reinforcement support structure 15 can also play a role in preventing adjacent battery cells 41 from coming together.

Preferably, referring to FIG. 5 , the pallet reinforcement support structure 15 includes several pallet reinforcement support blocks 151 . More specifically, the tray reinforcement support structure 15 includes six tray reinforcement support blocks 151 , and the six tray reinforcement support blocks 151 are arranged at equal intervals along the circumference of the cell pressure relief hole 13 .

Preferably, two adjacent cell pressure relief holes 13 share two tray reinforcement support blocks 151 to save cost.

Further, referring to FIG. 6 and FIG. 7 , in the tray accommodating cavity 11 , a tray cell positioning guide structure 14 is provided along the circumference of the cell pressure relief hole 13 . When the battery cell 41 is installed in the tray 1, the battery cell 41 needs to be arranged coaxially with the battery cell pressure relief hole 13, and the tray battery cell positioning and guiding structure 14 can play a positioning and guiding role for the installation of the battery cell 41, thereby ensuring that the electric cell The core 41 is arranged coaxially with the cell pressure relief hole 13 .

Further, referring to FIG. 8 and FIG. 9, in this embodiment, in the bracket accommodating cavity 21, the bracket 2 is provided with a bracket cell positioning structure 23, and the bracket cell positioning structure 23 and the tray cell positioning guide structure 14 are one by one. Correspondingly, to locate the same electric core 41 .

Specifically, the bracket cell positioning structure 23 is used to position the upper end of a cell 41, and the tray cell positioning guide structure 14 is used to position the lower end of the cell 41, that is, the correspondingly arranged bracket cell positioning The structure 23 and the tray cell positioning guide structure 14 are used to position the same cell 41 .

Optionally, in other embodiments, the bracket cell positioning structure 23 is in an overall continuous ring shape, the tray cell positioning guide structure 14 is also in an overall continuous ring shape, and the ring-shaped bracket cell positioning structure 23 and the ring Shaped tray cell positioning guide structures 14 are arranged in one-to-one correspondence to realize the positioning of the cell 41 .

After the assembly of the power battery module is completed, the battery cell positioning guide structure 14 of the tray will limit the lower end of the battery cell 41, and the battery cell positioning structure 23 of the bracket will limit the upper end of the battery cell 41. The two cooperate together to ensure The accuracy of the installation position of the battery cell 41, on the other hand, ensures that the battery cell 41 is accurately clamped in the cell clamping and fixing cavity, ensures the overall structural strength of the power battery module, and does not need to be reinforced with glue.

Specifically, referring to FIG. 7 , in this embodiment, the battery cell positioning guide structure 14 of the tray includes several battery cell positioning guide blocks 141 distributed at intervals along the circumference of the battery cell pressure relief hole 13 .

More specifically, in this embodiment, the positioning guide structure 14 for the battery cell tray includes six positioning guide blocks 141 for the battery cell tray.

Preferably, the cell positioning guide block 141 of each tray can be shared by two adjacent cell pressure relief holes 13 to save costs and ensure the arrangement density of the cells 41 . Specifically, a battery cell positioning guide block 141 of a tray is generally in the shape of a sheet, and two first positioning arc surfaces are arranged on it, and the two first positioning arc surfaces face the two cell pressure relief holes 13 one by one.

Specifically, referring to FIG. 9 , the battery cell positioning structure 23 of the bracket includes several battery cell positioning blocks 231 arranged at intervals along the circumference of the positive electrode installation hole 24 of the battery cell.

More specifically, the bracket cell positioning structure 23 includes six bracket cell positioning blocks 231 , and the six bracket cell positioning blocks 231 are arranged at equal intervals along the circumference of the cell positive pole installation hole 24 .

Preferably, in this embodiment, projected along the axial direction of the cell positive electrode installation hole 24, the projection of a frame cell positioning block 231 of the frame cell positioning structure 23 is located on the tray electric cell corresponding to the frame cell positioning structure 23. Between two adjacent pallet cell positioning guide blocks 141 of the core positioning guide structure 14 .

That is, after the assembly of the power battery module is completed, the corresponding bracket cell positioning structure 23 and the tray cell positioning guide structure 14 are arranged at intervals along the axis of the cell 41 . In the bracket cell positioning structure 23 and the tray cell positioning guide structure 14 that are provided correspondingly, the bracket cell positioning block 231 and the tray cell positioning guide block 141 are misplaced.

That is, along the circumferential direction of the battery cell 41 , the battery cell positioning block 231 of the bracket and the battery cell positioning guide block 141 of the tray are arranged in a staggered manner. Projected along the axial direction of the positive electrode installation hole 24 of the battery cell, the positioning block 231 of the battery cell of the bracket and the positioning guide block 141 of the battery cell of the tray can form a closed loop, ensuring that a total of twelve limits are applied to the cell 41 toward the axis of the cell 41 force, so as to ensure the fixation and isolation of the battery cell 41.

Further, referring to FIG. 1 , FIG. 3 , FIG. 10 and FIG. 11 , the power battery module also includes a CCS component. The CCS component, also called the battery module collection integrated part, is used to collect relevant parameters of the cell assembly 4 of the power battery module, such as voltage collection and temperature collection.

Specifically, referring to FIG. 10 and FIG. 11 , in this embodiment, the CCS assembly includes a bracket 2 , a bus bar 51 and a collection wire harness 52 .

The bus bar 51 is integrated into the bracket 2 ; the collection wire harness 52 is connected with the bus bar 51 and integrated into the bracket 2 .

In the prior art, the bus bar 51 and the collection wire harness 52 are generally installed on the plastic bracket first, and after the CCS component is integrated, the CCS component is then assembled on the module bracket. In this embodiment, both the bus bar 51 and the collection wire harness 52 are integrated on the bracket 2, so that the CCS components can be assembled with incoming materials as a whole. After the bracket 2 and the tray 1 are installed in place, the CCS assembly is also installed, which further improves the assembly efficiency of the power battery module.

Specifically, in the bracket accommodating cavity 21 , a clamping plate of a collection wire harness is arranged on the bracket 2 , and the collection wire harness is arranged in the clamping plate of the collection wire harness. At the same time, the inner side of the side plate of the bracket is also provided with a collection wire harness 52 . Nickel sheets are welded on the collection wire harness 52 , and each nickel sheet is welded on the bus bar 51 , so as to collect the voltage signal of the battery cell 41 . At the same time, an NTC is also provided on the collection wire harness 52 for collecting the temperature signal of the battery cell 41 .

Specifically, in this embodiment, the bracket 2 is a plastic bracket.

Embodiment two

This embodiment provides a power battery pack, which includes the power battery module and the case in the first embodiment. The power battery module is placed in the box.

Further, the box body includes side beams, and the side beams, the bracket flange 22 and the pallet flange 12 are connected and fixed through the connecting piece 3 .

Specifically, the power battery module is locked and attached to the side beam of the case of the power battery pack. Locking holes corresponding to the insertion shafts 312 are provided on the side beams of the box body. After inserting the shaft 312 through the bracket flange 22 and the tray flange 12 in turn, insert it into the locking hole on the side beam. The lower surface of the power battery pack is abutted against, so that the power battery module is locked on the side beam of the box body of the power battery pack.

In this embodiment, the bracket 2 and the tray 1 are locked to the side beam of the box body through the connecting piece 3, so that both the power battery module and the power battery pack have high mechanical strength.

The above embodiments only set forth the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. On the premise of not departing from the spirit and scope of the present invention, the present invention also has various changes and changes. These changes and changes are all fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (16)

1. Power battery module, its characterized in that includes:

the tray comprises a tray (1), wherein a tray accommodating cavity (11) is formed in the tray (1), and a tray flanging (12) is arranged on the side surface of the tray (1);

the battery cell clamping device comprises a support (2), wherein a support accommodating cavity (21) is formed in the support (2), support flanges (22) are arranged on the side surfaces of the support (2), and the support flanges (22) are connected with tray flanges (12) in a one-to-one corresponding mode, so that the tray accommodating cavity (11) and the support accommodating cavity (21) are closed to form a battery cell clamping fixing cavity;

the bracket flanging (22) and the tray flanging (12) which are correspondingly connected are connected through the connecting piece (3).

2. The power battery module as recited in claim 1, wherein one of the tray flange (12) and the bracket flange (22) is provided with a mounting positioning member (121), and the other is provided with a mounting positioning hole (221) engaged with the mounting positioning member (121).

3. The power battery module as recited in claim 1, wherein the connecting member (3) comprises a plug member (31), the plug member (31) comprises a limiting cap (311) and a plug shaft (312) connected with the limiting cap (311), the plug shaft (312) can sequentially pass through the support flange (22) and the tray flange (12), and the limiting cap (311) can abut against the support flange (22).

4. The power battery module as claimed in claim 3, characterized in that the connecting piece (3) further comprises a nut, wherein the plug shaft (312) is provided with an external thread, and the nut can be locked on the plug shaft (312).

5. The power battery module as set forth in claim 1, wherein the tray (1) is provided with cell pressure relief holes (13) communicated with the tray accommodating cavity (11), and the cell pressure relief holes (13) are arranged in one-to-one correspondence with the cells (41).

6. The power battery module as claimed in claim 5, wherein a tray cell positioning guide structure (14) is arranged in the tray accommodating cavity (11) along the circumferential direction of the cell pressure relief hole (13).

7. The power battery module as recited in claim 6, wherein in the support accommodating cavity (21), the support (2) is provided with support cell positioning structures (23), and the support cell positioning structures (23) are in one-to-one correspondence with the tray cell positioning guide structures (14) to position the same cell (41).

8. The power battery module as recited in claim 7, wherein the tray cell positioning guide structure (14) comprises a plurality of tray cell positioning guide blocks (141) spaced apart along a circumferential direction of the cell pressure relief hole (13).

9. The power battery module set according to claim 8, wherein the bracket (2) is provided with cell positive mounting holes (24) corresponding to the cells (41) one by one, and the bracket cell positioning structure (23) comprises a plurality of bracket cell positioning blocks (231) arranged at intervals along the circumferential direction of the cell positive mounting holes (24).

10. The power battery module set of claim 9, wherein, in the axial projection of the battery cell positive electrode mounting hole (24), the projection of one of the bracket battery cell positioning blocks (231) of the bracket battery cell positioning structure (23) is located between two adjacent tray battery cell positioning guide blocks (141) of the tray battery cell positioning guide structure (14) corresponding to the bracket battery cell positioning structure (23).

11. The power battery module as recited in claim 5, wherein a tray reinforcing support structure (15) is arranged on the surface of the tray (1) facing away from the tray accommodating cavity (11) along the circumferential direction of the cell pressure relief holes (13).

12. The power battery module as recited in claim 11, wherein the tray reinforcing and supporting structure (15) comprises a tray reinforcing and supporting block (151) protruding from the surface of the tray (1) facing away from the tray accommodating cavity (11), and reinforcing ribs are arranged on the circumference of the tray reinforcing and supporting block (151).

13. The power battery module of any of claims 1-12, further comprising a CCS assembly, the CCS assembly comprising:

a busbar (51) integrated to the bracket (2);

a collection wire harness (52) connected to the busbar (51) and integrated onto the bracket (2), the collection wire harness (52) being electrically connected to the busbar (51).

14. The power battery module as claimed in any one of claims 1-12, wherein the power battery module further comprises an electric core assembly (4), the electric core assembly (4) comprises a plurality of electric cores (41), and a negative electrode of each electric core (41) is clamped and installed in the electric core clamping and fixing cavity.

15. A power battery pack, characterized by comprising a box body and the power battery module as claimed in any one of claims 1 to 14, wherein the power battery module is arranged in the box body.

16. The power battery pack of claim 15, wherein the box body comprises a side beam, and the side beam, the bracket flange (22) and the tray flange (12) are fixedly connected through the connecting piece (3).

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