CN220984677U

CN220984677U - Battery module

Info

Publication number: CN220984677U
Application number: CN202322496341.XU
Authority: CN
Inventors: 化云; 范文博; 阮嵩钜; 江瑞芳; 王又佳; 施婕
Original assignee: Shanghai Rongheyuan Energy Storage Co ltd
Current assignee: Shanghai Rongheyuan Energy Storage Co ltd
Priority date: 2023-09-14
Filing date: 2023-09-14
Publication date: 2024-05-17
Anticipated expiration: 2033-09-14

Abstract

The utility model discloses a battery module, comprising: the wire harness isolation board and two electric core groups, the length of two electric core groups is different, and two electric core groups all include taut subassembly, two end plates and parallel arrangement's two rows of electric core, have the clearance between two rows of electric core, and two end plates divide to locate the both ends of two rows of electric core, and taut subassembly runs through the clearance between two rows of electric core, and connects two end plates respectively. The wire harness isolation plate covers the two battery core groups, and a plurality of conductive sheets electrically connected with the battery cores are arranged on the wire harness isolation plate. The tension component can adjust the interval between the two end plates to apply pressure to each cell so as to fixedly clamp each cell, and compared with the mode of strapping the cell groups by steel belts, the utility model simplifies the assembly structure by adopting the tension component to fix the cell groups. The battery module comprises two battery cell groups with different lengths, the two battery cell groups are difficult to fix simultaneously in a mode of binding by the same steel belt, and the tensioning assembly is more suitable for fixing the battery cell groups with different lengths respectively.

Description

Battery module

Technical Field

The utility model relates to the technical field of energy storage batteries, in particular to a battery module.

Background

In recent years, renewable energy sources are rapidly developed worldwide, and the traditional lithium ion battery using an organic solvent as an electrolyte has the problems of high energy density, low safety and high cost. Compared with the prior art, the novel water-based ion battery has the advantages of low price, no environmental pollution, high safety and the like, and has potential important application prospect in a large-scale energy storage system.

The existing novel water-based energy storage battery is constructed based on lithium/sodium electrochemical reaction, and an electrolyte adopts a water-based solution to finally prepare the square plastic-shell battery cell. The novel water system square shell energy storage battery cell is used as a basic energy storage unit, based on the characteristic of the novel battery cell, the binding force is high without the requirement of the lithium battery cell, if the traditional steel belt binding battery cell is adopted, the cost is high, the assembly difficulty is high, the improvement of the assembly efficiency is not facilitated, when the battery module comprises two battery cell groups with different lengths, the same steel belt binding two battery cell groups are difficult to adopt, if the two battery cell groups are respectively bound by the steel belt, the assembly process is complex, and the assembly cost is high.

In view of this, the present utility model has been made.

Disclosure of utility model

The utility model provides a battery module.

The application provides the following technical scheme:

A battery module, comprising:

The battery cell comprises two battery cell groups, wherein the two battery cell groups are arranged in parallel, the lengths of the two battery cell groups are different, the two battery cell groups comprise a tensioning assembly, two end plates and two rows of battery cells arranged in parallel, gaps are reserved between the two rows of battery cells, the two end plates are respectively arranged at two ends of the two rows of battery cells, and the tensioning assembly penetrates through the gaps between the two rows of battery cells and is respectively connected with the two end plates;

The wire harness isolation plate is used for respectively covering the two battery cell groups, and a plurality of conductive sheets electrically connected with the battery cells are arranged on the wire harness isolation plate.

Optionally, the tensioning assembly comprises a tie rod and two end pieces;

The pull rod penetrates through a gap between the two rows of electric cores, the two end pieces are respectively connected to two ends of the pull rod, and the two end pieces are respectively limited on the two end plates.

Optionally, one of the end pieces is fixed to one end of the pull rod,

The other end piece is detachably connected with the other end of the pull rod.

Optionally, at least one end of the pull rod is provided with an external thread, and at least one end piece is provided with a thread groove so as to be connected with the pull rod in a threaded manner.

Optionally, the end plate is provided with a through hole, and one surface of the end plate, which is away from the battery cell group, is provided with a convex ring;

The convex ring is arranged around the through hole;

The pull rod penetrates through the through hole;

the end piece can be accommodated inside the convex ring.

Optionally, each of the battery cell groups includes at least two of the tension assemblies;

Each tensioning assembly is sequentially arranged along the direction perpendicular to the wire harness isolation plate.

Optionally, one ends of the two battery cell groups are flush, and a gap is formed between the other ends of the two battery cell groups;

The positive electrode conductive sheet and the negative electrode conductive sheet on the wire harness isolation plate extend to the empty part.

Optionally, the harness isolation board has a main board body and a terminal housing connected to the main board body;

the main board body covers the two battery cell groups, and the terminal shell extends to the vacant part;

the positive electrode conductive sheet and the negative electrode conductive sheet extend into the terminal housing.

Optionally, the terminal housing has a bottom wall and an extension wall connecting the bottom wall;

The extension wall is connected to the edge of the bottom wall;

The extension wall is respectively and vertically connected with the bottom wall and the main board body;

the positive electrode conductive sheet and the negative electrode conductive sheet extend along the extending wall to one side of the bottom wall.

Optionally, a plurality of avoidance holes for avoiding the insulating support seat are formed in the bottom wall.

By adopting the technical scheme, the application has the following beneficial effects:

the tension component can adjust the interval between the two end plates to apply pressure to each cell so as to fixedly clamp each cell, and compared with the mode of strapping the cell groups by steel belts, the application simplifies the assembly structure by adopting the tension component to fix the cell groups. The battery module comprises two battery cell groups with different lengths, the two battery cell groups are difficult to fix simultaneously in a mode of binding by the same steel belt, and the tensioning assembly is more suitable for fixing the battery cell groups with different lengths respectively.

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:

Fig. 1 is a schematic perspective view illustrating a battery module according to an embodiment of the present application;

Fig. 2 is a schematic diagram showing a fitting structure of a tightening assembly and an end plate in a battery module according to an embodiment of the present application;

Fig. 3 shows a partial structural view of fig. 2.

In the figure: 3. a battery module; 31. a cell group; 32. an end plate; 321. a convex ring; 33. a tensioning assembly; 331. a pull rod; 332. an end piece; 35. a harness isolation plate; 351. a main board body; 352. a terminal housing; 3521. a bottom wall; 3522. avoidance holes; 37. a positive electrode conductive sheet; 38. and a negative electrode conductive sheet.

It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 to 3, an embodiment of the present application provides a battery module 3 including: a harness isolation plate 35 and two cell groups 31. The lengths of the two battery cell groups 31 are different, the two battery cell groups 31 comprise a tensioning assembly 33, two end plates 32 and two rows of battery cells which are arranged in parallel, gaps are reserved between the two rows of battery cells, the two end plates 32 are respectively arranged at two ends of the two rows of battery cells, and the tensioning assembly 33 penetrates through the gaps between the two rows of battery cells and is respectively connected with the two end plates 32. The wire harness isolation plate 35 covers the two battery cell groups 31 respectively, and a plurality of conductive sheets electrically connected with the battery cells are arranged on the wire harness isolation plate 35.

The application adopts the tensioning assembly 33 to fix the battery cell group 31, thereby simplifying the assembly structure. The battery module 3 of the application comprises two battery cell groups 31 with different lengths, and the two battery cell groups 31 are difficult to be fixed simultaneously in a mode of binding by the same steel belt, and the tensioning assembly 33 adopted by the application is more suitable for fixing the battery cell groups 31 with different lengths respectively.

The electric core can be a water-based square shell energy storage electric core, the tension component 33 can adjust the interval between the two end plates 32 to apply pressure to each electric core so as to fixedly clamp each electric core plastic shell, so that the volume expansion of the electric core after the liquid injection is completed and in the charging and discharging process is eliminated, the stress uniformity of the battery module 3 is improved due to the cooperation structure of the tension component 33 and the end part, the deformation of the electric core after the liquid injection is completed and in the circulating process is reduced, and the durability of the battery module 3 is improved.

In one possible embodiment, the tension assembly 33 includes a tension rod 331 and two end pieces 332, the tension rod 331 penetrates through a gap between two rows of cells, the two end pieces 332 are respectively connected to two ends of the tension rod 331, and the two end pieces 332 are respectively limited to the two end plates 32. By providing the end pieces 332, both end plates 32 can be restrained to maintain clamping of each cell.

Preferably, one end piece 332 is fixed to one end of the pull rod 331, and the other end piece 332 is detachably connected to the other end of the pull rod 331. During assembly, only one end piece 332 needs to be installed, so that the assembly workload is reduced, and the assembly efficiency is improved.

In one possible embodiment, at least one end of the pull rod 331 is provided with external threads, and at least one of the end pieces 332 has a threaded groove for threaded connection to the pull rod 331. The end piece 332 may be a nut, and the end piece 332 can be adjusted to move along the length direction of the pull rod 331 by rotating the end piece 332, so as to compress or release each cell.

The end plate 32 is provided with a through hole, one surface of the end plate 32, which faces away from the battery cell group 31, is provided with a convex ring 321, the convex ring 321 is arranged around the through hole, the pull rod 331 penetrates through the through hole, and the end piece 332 can be accommodated inside the convex ring 321. The end piece 332 does not protrude beyond the end plate 32, avoiding interference with other structures.

In one possible embodiment, each of the battery cell groups 31 includes at least two of the tension members 33, and the tension members 33 are disposed in sequence in a direction perpendicular to the harness isolation plate 35. The greater the number of tensioning assemblies 33, the better the clamping and fixing effect on the cells.

In one possible embodiment, referring to fig. 1, one ends of the two cell groups 31 are flush, a gap is formed between the other ends of the two cell groups 31, and the positive electrode conductive sheet 37 and the negative electrode conductive sheet 38 on the harness isolation plate 35 extend to the gap (the two conductive sheets at two ends of each conductive sheet on the harness isolation plate 35 are the positive electrode conductive sheet 37 and the negative electrode conductive sheet 38, respectively). The embodiment of the application fully utilizes the vacant parts formed at the end parts of the two battery cell groups 31, and the vacant parts are provided with the electric connection structures, thereby fully utilizing the space in the vacant parts.

The harness isolation board 35 has a main board body 351 and a terminal case 352 connected to the main board body 351, the main board body 351 covers the two cell groups 31, the terminal case 352 extends to the hollow portion, and the positive electrode conductive sheet 37 and the negative electrode conductive sheet 38 extend into the terminal case 352. The terminal shell 352 has the effect of protecting the internal conducting strip, and the terminal seat can be internally and conveniently used for centralized external wiring and cable outgoing.

In one possible embodiment, the terminal case 352 has a bottom wall 3521 and an extension wall connected to the bottom wall 3521, the extension wall being connected to a rim of the bottom wall 3521, the extension wall being vertically connected to the bottom wall 3521 and the main board 351, respectively. The positive electrode conductive sheet 37 and the negative electrode conductive sheet 38 each extend along the extending wall toward the bottom wall 3521.

The bottom wall 3521 is provided with a plurality of avoiding holes 3522 for avoiding the insulating support seat. An insulating support seat is arranged in the battery pack, the insulating support seat penetrates through the avoiding hole 3522, the positive electrode conducting plate 37 and the negative electrode conducting plate 38 extend to the corresponding insulating support seats respectively, threaded holes are formed in the insulating support seats, and one end of a conductive piece conveniently penetrates through the conducting plates to be connected to the insulating support seats in a threaded mode. An external cable (e.g., copper bar) may then be connected to the conductive member, which may include a stud portion and a nut portion at one end of the stud portion.

The foregoing description is only illustrative of the preferred embodiment of the present utility model, and is not to be construed as limiting the utility model, but is to be construed as limiting the utility model to any simple modification, equivalent variation and variation of the above embodiments according to the technical matter of the present utility model without departing from the scope of the utility model.

Claims

1. A battery module, comprising:

2. The battery module of claim 1, wherein the tightening assembly comprises a tie rod and two end pieces;

3. The battery module according to claim 2, wherein one of the end members is fixed to one end of the tie rod,

The other end piece is detachably connected with the other end of the pull rod.

4. The battery module according to claim 2, wherein at least one end of the tie rod is provided with external threads, and at least one of the end members has a thread groove to be screwed to the tie rod.

5. The battery module according to claim 2, wherein the end plate is provided with a through hole, and a convex ring is arranged on one surface of the end plate, which is away from the cell group;

The convex ring is arranged around the through hole;

The pull rod penetrates through the through hole;

the end piece can be accommodated inside the convex ring.

6. The battery module of claim 1, wherein each of the cell stacks comprises at least two of the tension assemblies;

7. The battery module according to any one of claims 1 to 6, wherein one ends of the two cell lines are flush, and a hollow portion is formed between the other ends of the two cell lines;

8. The battery module according to claim 7, wherein the harness isolation plate has a main plate body and a terminal housing that connects the main plate body;

9. The battery module according to claim 8, wherein the terminal housing has a bottom wall and an extension wall connecting the bottom wall;

The extension wall is connected to the edge of the bottom wall;

10. The battery module of claim 9, wherein a plurality of relief holes are formed in the bottom wall to relieve the insulating support.