CN220155708U

CN220155708U - Novel square battery module structure

Info

Publication number: CN220155708U
Application number: CN202321715624.2U
Authority: CN
Inventors: 魏力
Original assignee: Linkdata New Energy Co Ltd
Current assignee: Linkdata New Energy Co Ltd
Priority date: 2023-06-30
Filing date: 2023-06-30
Publication date: 2023-12-08
Anticipated expiration: 2033-06-30

Abstract

The utility model relates to the technical field of power batteries, and discloses a novel square battery module structure, which comprises the following components: the battery cell assembly comprises a bus bar, a battery cell group arranged on the bus bar and a fixing assembly arranged on the battery cell group and used for binding and protecting the battery cell group; the battery cell group comprises a plurality of square battery cells, the busbar comprises a flexible circuit board and a heating film integrated on the flexible circuit board, the square battery cells are arranged on two sides of the heating film and are adhered and fixed with the side wall of the heating film, nickel sheets and tabs corresponding to the nickel sheets are arranged on the flexible circuit board, the tabs are electrically connected with the square battery cells, and the nickel sheets are welded with the flexible circuit board. The utility model ensures that the battery cell dissipates heat and is heated uniformly, improves the heating efficiency of the heating film, and avoids the risk of falling off the battery cell.

Description

Novel square battery module structure

Technical Field

The utility model relates to the technical field of power batteries, in particular to a novel square battery module structure.

Background

Square battery module is widely used as electric power/power source on container formula commercial car, and along with the continuous improvement of user to battery duration requirement, square battery contains the assembly design of more than a set of module, but the stack and the heating film mode of pasting of square battery module among the prior art, when whole module carries out thermal management control, because the inside electric core of group battery receives the restriction of stack mode and leads to unable quick effluvium of inside heat, can't realize the heating of the electric core in the module fast under the low temperature condition simultaneously, lead to the uniformity of the temperature field of whole battery module relatively poor from this, influence the performance of electric core electric property, and unilaterally paste the heating film easily break away from with the electric core, seriously influence the security and the reliability of whole module, this kind of condition needs to change.

Disclosure of Invention

In view of this, the utility model provides a novel square battery module structure to solve the problems of uneven heat dissipation and heating of the battery cell, low heating rate of the heating film and risk of falling off of the battery cell.

In order to achieve the above purpose, the technical scheme adopted is as follows:

a novel prismatic battery module structure, comprising:

the battery cell assembly comprises a bus bar, a battery cell group arranged on the bus bar and a fixing assembly arranged on the battery cell group and used for binding and protecting the battery cell group;

the battery cell group comprises a plurality of square battery cells, the busbar comprises a flexible circuit board and a heating film integrated on the flexible circuit board, the square battery cells are arranged on two sides of the heating film and are adhered and fixed with the side wall of the heating film, nickel sheets and tabs corresponding to the nickel sheets are arranged on the flexible circuit board, the tabs are electrically connected with the square battery cells, and the nickel sheets are welded with the flexible circuit board.

The utility model is further provided with: the fixed subassembly includes end plate, first fixed band and second fixed band, the end plate is located the both ends of electric core group, first fixed band with the second fixed band is around establishing on the end plate with the electric core group, just first fixed band with the second fixed band keeps the distance.

The utility model is further provided with: the outer surface of square electric core is overlapped and is equipped with the protection film, the cover is equipped with the pyrocondensation sleeve on the first fixed band, the pyrocondensation sleeve with the protection film butt.

The utility model is further provided with: the protective film is a PET blue film.

The utility model is further provided with: the end plate deviates from one side of the battery cell group, and is respectively located the first fixing band and the second fixing band are integrally connected with clamping strips, and the first fixing band and the second fixing band are matched with the clamping strips.

The utility model is further provided with: the first fixing strap is parallel to the second fixing strap.

The utility model is further provided with: the first fixing belt is a steel belt, and the second fixing belt is a plastic steel belt.

The utility model is further provided with: the top of square electric core is equipped with the top cap paster, adjacent square electric core the top cap paster with same the tab electric connection.

The utility model is further provided with: the busbar extends along the arrangement direction of the square battery cells, and keeps flush with two ends of the battery cell group, the square battery cells are symmetrically arranged on two sides of the heating film, and the nickel sheets and the barks are symmetrically arranged on the flexible circuit board.

The utility model is further provided with: and a strip-shaped through hole is formed in the heating film and positioned at the arrangement position of the adjacent square battery cells.

In summary, compared with the prior art, the utility model discloses a novel square battery module structure, which comprises a bus bar, a battery cell group and a fixing component, wherein the fixing component is used for binding and protecting the battery cell group on the bus bar, the bus bar comprises a flexible circuit board and a heating film integrated on the flexible circuit board, the square battery cells forming the battery cell group are arranged on two sides of the heating film and are adhered and fixed with the side wall of the heating film, nickel sheets and tabs corresponding to the nickel sheets are arranged on the flexible circuit board, the tabs are electrically connected with the square battery cells, and the nickel sheets are welded with the flexible circuit board, namely, the square battery cells are uniformly radiated and heated through the arrangement, so that the heating efficiency of the heating film is improved, and the risk of falling off of the square battery cells is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a novel prismatic battery module structure according to the present embodiment;

FIG. 2 is a schematic perspective view of a bus bar according to the present embodiment;

fig. 3 is a schematic perspective view of the fixing assembly of the present embodiment.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. In the following description, suffixes such as "module", "part" or "unit" for representing elements are used only for facilitating the description of the present utility model, and have no specific meaning per se. Thus, "module," "component," or "unit" may be used in combination.

In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the positional or positional relationship 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 element in question 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The technical scheme shown in the utility model will be described in detail through specific examples. The following description of the embodiments is not intended to limit the priority of the embodiments.

As described in the background art, in the stacking and heating film adhering manner of the square battery module in the prior art, when the whole module is subjected to thermal management control, internal heat cannot be rapidly dissipated due to the limitation of the stacking manner of the internal battery cells of the battery pack, and meanwhile, the heating of the battery cells in the module cannot be rapidly realized under the low temperature condition, so that the consistency of a temperature field of the whole battery module is poor, the exertion of the electrical performance of the battery cells is influenced, and the heating film adhered on one side is easily separated from the battery cells, so that the safety and the reliability of the whole module are seriously influenced.

Referring to fig. 1-3, the novel square battery module structure includes a bus bar 10, a battery cell group 20 disposed on the bus bar 10, and a fixing assembly 30 disposed on the battery cell group 20 for binding and protecting the battery cell group 20, i.e. a plurality of square battery cells 21 forming the battery cell group 20 are uniformly connected in series through the bus bar 10, and the square battery cells 21 are fixed as a whole through the fixing assembly 30, so as to exert the function of the novel square battery module structure.

In the implementation process, the busbar 10 comprises a flexible circuit board 11 and a heating film 12 integrated on the flexible circuit board 11, a plurality of square electric cores 21 are arranged on two sides of the heating film 12 and are adhered to the side wall of the heating film 12, so that the square electric cores 21 are fixed, the contact area between the heating film 12 and the square electric cores 21 is increased, the heat dissipation and heating uniformity of the square electric cores 21 can be guaranteed due to the structural design of stacking the square electric cores 21 on the double-row side surface based on the heating film 12, and the risk that the square electric cores 21 fall off from the heating film 12 is avoided.

Further, nickel piece 13 and the corresponding tab 14 of nickel piece 13 are arranged on flexible circuit board 11, square electric core 21 of tab 14 electric connection, and weld with flexible circuit board 11 through nickel piece 13, wherein, the top of square electric core 21 is equipped with top cap paster 22, the top cap paster 22 and the same tab 14 electric connection of adjacent square electric core 21, busbar 10 extends along the range direction of square electric core 21, and keep the parallel and level with the both ends of electric core group 20, with this unified square electric core 21 of establishing ties through busbar 10 and heating membrane 12, need not to supply power for heating membrane 12 alone again promptly, improve product convenience and price/performance ratio.

The square battery cells 21 are symmetrically arranged on two sides of the heating film 12, the nickel sheets 13 and the barks 14 are symmetrically arranged on the flexible circuit board 11 so as to maintain the symmetry of the whole structure, and based on the symmetrical arrangement, the uniform heat dissipation and heating of the square battery cells 21 are ensured.

In some embodiments, the integrated flexible circuit board 11 and the heating film 12 are designed perpendicular to each other, and the heating film 12 is located on the central axis of the flexible circuit board 11, so as to arrange the square cells 21.

It should be noted that, on the heating film 12 and at the arrangement position of the adjacent square electric cores 21, a strip-shaped through hole 15 is formed, so that the square electric cores 21 on two sides of the heating film 12 have an intercommunication channel, so that the square electric cores 21 dissipate heat and are heated uniformly.

In this embodiment, the fixing assembly 30 includes an end plate 31, a first fixing strap 32 and a second fixing strap 33, the end plate 31 is disposed at two ends of the cell set 20, the first fixing strap 32 and the second fixing strap 33 are wound on the end plate 31 and the cell set 20, and the first fixing strap 32 and the second fixing strap 33 keep a distance, that is, the end plate 31 is fastened by the first fixing strap 32 and the second fixing strap 33 so as to bind the square cell 21.

Further, the outer surface of the square battery cell 21 is sleeved with a protective film, the first fixing belt 32 is sleeved with a heat shrinkage sleeve 34, and the heat shrinkage sleeve 34 is abutted with the protective film, so that the protection level of the square battery cell 21 is improved, the square battery cell 21 is prevented from being bumped or scratched, and the working safety of the square battery cell 21 is improved.

In some embodiments, the protective film is a PET blue film.

It should be noted that, the end plate 31 is located at a side facing away from the battery cell group 20, and is integrally connected with the clamping strip 35 at the first fixing strap 32 and the second fixing strap 33, so that the first fixing strap 32 and the second fixing strap 33 are matched with the clamping strip 35, and the fixing assembly of the first fixing strap 32 and the second fixing strap 33 is facilitated, and the overall structural strength of the fixing assembly 30 is improved.

Wherein, the first fixing strap 32 is a steel strap, and the second fixing strap 33 is a plastic steel strap, so as to improve the binding strength of the fixing assembly 30.

In some embodiments, the first securing strap 32 is parallel to the second securing strap 33 to facilitate uniformity of its binding to the prismatic cell 21.

To sum up, this embodiment discloses a novel square battery module structure, including busbar 10, electric core group 20 and fixed subassembly 30, fixed subassembly 30 constraint and protection electric core group 20 are on busbar 10, and busbar 10 includes flexible circuit board 11 and the heating film 12 of integration on flexible circuit board 11, the square electric core 21 of constituteing electric core group 20 symmetrical arrangement is in the both sides of heating film 12, and bond fixedly with the lateral wall of heating film 12, wherein, nickel piece 13 and the corresponding bat piece 14 of nickel piece 13 are arranged to the symmetry on flexible circuit board 11, the square electric core 21 of bat piece 14 electric connection, and weld with flexible circuit board 11 through nickel piece 13, promptly through above-mentioned setting, make square electric core 21 heat dissipation and heating even, the heating efficiency of heating film 12 has been improved, and the risk that square electric core 21 drops has been stopped.

The foregoing has outlined rather broadly the more detailed description of the utility model in order that the detailed description of the principles and embodiments of the utility model may be implemented in conjunction with the detailed description of the embodiments that follow; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.

Claims

1. Novel square battery module structure, its characterized in that includes:

2. The novel prismatic battery module structure of claim 1, wherein the fixing assembly comprises an end plate, a first fixing strap and a second fixing strap, the end plate is arranged at two ends of the battery cell group, the first fixing strap and the second fixing strap are wound on the end plate and the battery cell group, and the first fixing strap and the second fixing strap keep a distance.

3. The novel square battery module structure according to claim 2, wherein a protective film is sleeved on the outer surface of the square battery cell, a heat shrinkage sleeve is sleeved on the first fixing strap, and the heat shrinkage sleeve is abutted to the protective film.

4. The novel prismatic battery module structure according to claim 3, wherein the protective film is a PET blue film.

5. The novel prismatic battery module structure of claim 2, wherein the end plate is located at a side away from the battery cell group, and is integrally connected with a clamping strip at the first fixing strap and the second fixing strap, and the first fixing strap and the second fixing strap are matched with the clamping strip.

6. The novel prismatic battery module structure of claim 5, wherein the first strap is parallel to the second strap.

7. The novel prismatic battery module structure of claim 2, wherein the first securing strap is a steel strap and the second securing strap is a plastic strap.

8. The novel prismatic battery module structure of claim 1, wherein a top end of the prismatic battery cell is provided with a top cover patch, and the top cover patches of adjacent prismatic battery cells are electrically connected with the same tab.

9. The novel prismatic battery module structure according to any one of claims 1 to 8, wherein the bus bars extend along the arrangement direction of the prismatic cells and are kept flush with both ends of the cell group, the prismatic cells are symmetrically arranged on both sides of the heating film, and the nickel sheets and the tabs are symmetrically arranged on the flexible circuit board.

10. The novel prismatic battery module structure according to any of claims 1 to 8, wherein a strip-shaped through hole is opened on the heating film at an arrangement position of the adjacent prismatic cells.