CN220065982U

CN220065982U - Battery pack

Info

Publication number: CN220065982U
Application number: CN202321683230.3U
Authority: CN
Inventors: 高成铨; 卢洪涛; 杜宏宇; 张蒙远; 杨海东
Original assignee: Trina Energy Storage Solutions Jiangsu Co Ltd
Current assignee: Trina Energy Storage Solutions Jiangsu Co Ltd
Priority date: 2023-06-29
Filing date: 2023-06-29
Publication date: 2023-11-21
Anticipated expiration: 2033-06-29

Abstract

The utility model belongs to the field of lithium batteries, and particularly provides a battery pack, which comprises: a bottom support plate and a battery cell module; a fixed area is arranged on the bottom supporting plate; at least two bonding layers are arranged in the fixed area at intervals; the cell module is fixed in the fixed area through the bonding layer. The cell module is fixed in an auxiliary mode through the bonding layer, the stability of connection between the cell module and the bottom supporting plate is improved, meanwhile, the original bottom supporting plate is in hard contact with the cell module, soft contact through the bonding layer is achieved, friction between the cell module and the bottom supporting plate is avoided, and accordingly accidents caused by friction are avoided.

Description

Battery pack

Technical Field

The utility model belongs to the technical field of lithium batteries, and particularly relates to a battery pack.

Background

The development of the age brings higher requirements to the structure and the battery performance of the lithium battery, especially breaks through in the large-size field, and shows the development of bamboo shoots after rain; the large-size battery has the advantages of simple structure, good heat dissipation performance and high storage capacity density, and is widely used by power batteries and energy storage batteries.

In the existing battery pack, the battery cell module is generally fixed on the bottom plate directly through bolts, hard contact is formed between the battery cell module and the bottom plate, the bolts need to be screwed by using a torque wrench when being fixed, torque of the torque wrench is detected to ensure that the bolts cannot be screwed too tightly when being fixed, so that the pressure between the battery cell module and the bottom plate is too high, and meanwhile, too loose screwing is avoided when the bolts are fixed, so that gaps exist between the battery cell module and the bottom plate.

When the torque wrench is used, the torque wrench needs to be manually screwed, the torque wrench pays attention to torque all the time, so that screwing accuracy is guaranteed, time and labor are wasted, in addition, the torque wrench is fixed by bolts, due to production accuracy of the bolts and the screws, screwing forces of different parts on the battery cell module are different, gaps are formed between the battery cell module and the bottom plate when the battery cell module is matched with the bottom plate, gaps exist between the battery cell module and the bottom plate after the bolts are loosened, shaking occurs between the battery cell module, friction occurs between the bottom plate and the battery cell module, and potential safety hazards can be caused.

Simultaneously, when the cell module is heated and expands, the pressure that can make the billet receive increases, and when the pressure exceeds a limit, can lead to the billet to be collapsed to lead to unable constraint to the cell, thereby lead to the cell unable to be fixed on the backing plate, and then cause the steadiness greatly reduced between cell module and the backing plate.

The above problems are currently in need of solution.

Disclosure of Invention

The utility model aims to provide a battery pack, so that the connection stability between each battery cell module and a bottom support plate in the battery pack is improved.

In order to solve the above technical problems, the present utility model provides a battery pack, comprising: a bottom support plate and a battery cell module;

a fixed area is arranged on the bottom supporting plate;

at least two bonding layers are arranged in the fixed area at intervals;

the cell module is fixed in the fixed area through the bonding layer.

Further, the bonding layer is bonded with the side edge of the bottom surface of the battery cell module in the length direction.

Further, a silica gel layer is arranged between two adjacent bonding layers.

Further, the silica gel layer is propped against the middle part of the bottom surface of the battery cell module.

Further, the number of the battery cell modules is a plurality of;

the plurality of battery cell modules are arranged in parallel along the width direction.

Further, the battery cell module comprises: a front end plate, a rear end plate and at least two electric cores;

the front end plate and the rear end plate are oppositely arranged;

at least two electric cores are arranged between the front end plate and the rear end plate;

and a buffer layer is arranged between the front end plate and the rear end plate.

Further, the cell module further comprises a fixing belt;

the fixing strap is adapted to fix the front end plate and the rear end plate.

Further, the buffer layer is arranged between the front end plate and the rear end plate and the battery cell.

Further, the buffer layer is arranged between the adjacent battery cells.

Further, a first fixing strip and a second fixing strip are arranged on the bottom supporting plate;

the first fixing strips and the second fixing strips are arranged at two ends of the fixing area and correspond to the front end plate and the rear end plate of the battery cell module;

the front end plate and the rear end plate are respectively fixed on the first fixing strip and the second fixing strip.

The utility model has the beneficial effects that the utility model provides a battery pack, which comprises: a bottom support plate and a battery cell module; a fixed area is arranged on the bottom supporting plate; at least two bonding layers are arranged in the fixed area at intervals; the cell module is fixed in the fixed area through the bonding layer. The cell module is fixed in an auxiliary mode through the bonding layer, the stability of connection between the cell module and the bottom supporting plate is improved, meanwhile, the original bottom supporting plate is in hard contact with the cell module, soft contact through the bonding layer is achieved, friction between the cell module and the bottom supporting plate is avoided, and accordingly accidents caused by friction are avoided.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

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

Fig. 1 is a schematic view of a battery pack according to an embodiment of the present utility model.

Fig. 2 is a schematic structural view of a bottom plate according to an embodiment of the present utility model.

Fig. 3 is an exploded view of a battery module according to an embodiment of the present utility model.

In the figure: 100. a bottom support plate; 110. a fixed area; 120. an adhesive layer; 130. a silica gel layer; 140. a first fixing strip; 150. a second fixing strip; 200. a battery cell module; 210. a front end plate; 220. a rear end plate; 230. a battery cell; 240. a buffer layer; 250. a fixing belt.

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 of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

Referring to fig. 1-3, the present embodiment provides a battery pack, including: a bottom plate 100 and a cell module 200; the bottom support plate 100 is provided with a fixing area 110; at least two adhesive layers 120 are arranged in the fixed area 110 at intervals; the battery cell module 200 is fixed to the fixing area 110 through the adhesive layer 120. The cell module 200 is fixed in an auxiliary mode through the bonding layer 120, the stability of connection between the cell module 200 and the bottom supporting plate 100 is improved, meanwhile, the original hard contact between the bottom supporting plate 100 and the cell module 200 is changed into soft contact through the bonding layer 120, friction between the cell module 200 and the bottom supporting plate 100 is avoided, and therefore accidents caused by friction are avoided.

In this embodiment, the adhesive layer 120 is adhered to the side edge of the bottom surface of the battery module 200 in the longitudinal direction. It should be noted that, the adhesive layer 120 is made of UG9012, and the silicone layer 130 abuts against the polyurethane heat-conducting structural adhesive in the middle of the bottom surface of the battery cell module 200.

In this embodiment, a silica gel layer 130 is disposed between two adjacent adhesive layers 120. The silica gel layer 130 abuts against the middle of the bottom surface of the battery cell module 200. It should be noted that, the silica gel layer 130 is foamed silica gel, and plays a supporting role, so as to prevent the battery cell module 200 from shaking on the bottom plate 100. The specific model of the foamed silica gel is TE-800H, and TE-800H is a medium stress organic silicon foamed silica gel material, which has excellent compression set resistance, and the middle supporting performance between the silica gel layer 130 and the bottom surface of the battery cell module 200. Compared with the traditional carbon foaming material, the material has the characteristics of excellent high and low temperature resistance, high flame retardance, extremely low smoke concentration and the like. In addition, the material has excellent ageing resistance and weather resistance, and is an ideal material for shock absorption, buffering, sound insulation, protection, insulation and fire prevention.

Meanwhile, the air between the cell module 200 and the bottom support plate 100 is exhausted through the silica gel layer 130, so that the heat conduction capacity is improved, and meanwhile, the static friction force between the cell module 200 and the bottom support plate 100 is increased due to the high damping coefficient of the silica gel layer 130, so that the connection stability is improved.

In this embodiment, the number of the battery cell modules 200 is plural; the plurality of the cell modules 200 are arranged in parallel in the width direction.

Wherein, the battery cell module 200 comprises: a front end plate 210, a rear end plate 220, and at least two battery cells 230; the front end plate 210 and the rear end plate 220 are oppositely arranged; at least two of the cells 230 are disposed between the front and rear end plates 210, 220; a buffer layer 240 is further disposed between the front end plate 210 and the rear end plate 220. By setting the buffer layer 240 as a reserved deformation amount of the adjacent battery cells 230, when the battery cells 230 are heated to deform, the stress on the front end plate 210 and the rear end plate 220 is reduced, and meanwhile, when the battery cells 230 expand, the dimensional accuracy of the battery cell module 200 is not affected. When the cell 230 is displaced due to expansion, the generated displacement can be compensated by the silica gel layer 130 on the bottom support plate 100, namely, the silica gel layer 130 is stretched along with the expansion of the cell 230, and meanwhile, the expansion force of the cell 230 is uniformly dispersed on the silica gel layer 130, so that the pressure on the front end plate 210 and the rear end plate 220 is reduced, and the bonding strength between the cell module 200 and the bottom support plate 100 is ensured not to be influenced by the expansion of the cell 230.

In this embodiment, the battery cell module 200 further includes a fixing strap 250; the securing strap 250 is adapted to secure the front end plate 210 and the rear end plate 220. By arranging the buffer layer 240 and the silica gel layer 130, two buffers are formed, so that the pressure of the expansion of the battery cell 230 to the fixing belt 250 is reduced, the loosening of the battery cell module 200 is avoided, and the connection strength between the battery cell module 200 and the bottom support plate 100 is improved.

In this embodiment, the bottom plate 100 is provided with a first fixing strip 140 and a second fixing strip 150; the first fixing strip 140 and the second fixing strip 150 are disposed at two ends of the fixing area 110 and correspond to the positions of the front end plate 210 and the rear end plate 220 of the battery module 200; the front end plate 210 and the rear end plate 220 are fixed to the first fixing bar 140 and the second fixing bar 150, respectively.

In this embodiment, the buffer layer 240 is disposed between the front and rear end plates 210 and 220 and the battery cells 230. It should be noted that, the material of the buffer layer 240 is foam or other elastic material, so long as the supporting and deformation requirements of the present utility model can be satisfied, which is within the protection scope of the present embodiment.

In other embodiments, the buffer layer 240 may be disposed between adjacent cells 230, or the buffer layer 240 may be disposed between adjacent cells 230, and between the front end plate 210 and the rear end plate 220 and the cells 230.

In summary, the present utility model provides a battery pack, including: a bottom plate 100 and a cell module 200; the bottom support plate 100 is provided with a fixing area 110; at least two adhesive layers 120 are arranged in the fixed area 110 at intervals; the battery cell module 200 is fixed to the fixing area 110 through the adhesive layer 120. The cell module 200 is fixed in an auxiliary mode through the bonding layer 120, the stability of connection between the cell module 200 and the bottom supporting plate 100 is improved, meanwhile, the original hard contact between the bottom supporting plate 100 and the cell module 200 is changed into soft contact through the bonding layer 120, friction between the cell module 200 and the bottom supporting plate 100 is avoided, and therefore accidents caused by friction are avoided.

The components (components not illustrating the specific structure) selected in the present utility model are common standard components or components known to those skilled in the art, and the structures and principles thereof are known to those skilled in the art through technical manuals or through routine experimental methods. Moreover, the software program related to the utility model is the prior art, and the utility model does not relate to any improvement on the software program.

In the description of embodiments of the present utility model, 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, and can be communication between two elements. 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.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "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 devices or elements referred to must have a specific orientation, be configured 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.

In the several embodiments provided by the present utility model, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present utility model may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims

1. A battery pack, comprising: a bottom support plate and a battery cell module;

a fixed area is arranged on the bottom supporting plate;

at least two bonding layers are arranged in the fixed area at intervals;

the cell module is fixed in the fixed area through the bonding layer.

2. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells,

the bonding layer is bonded with the side edge of the bottom surface of the battery cell module in the length direction.

3. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells,

a silica gel layer is arranged between two adjacent bonding layers.

4. The battery pack of claim 3, wherein the battery pack comprises a plurality of battery cells,

the silica gel layer is propped against the middle part of the bottom surface of the battery cell module.

5. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells,

the number of the battery cell modules is multiple;

6. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells,

the battery cell module comprises: a front end plate, a rear end plate and at least two electric cores;

the front end plate and the rear end plate are oppositely arranged;

7. The battery pack of claim 6, wherein the battery pack comprises a plurality of battery cells,

the cell module further comprises a fixing belt;

the fixing strap is adapted to fix the front end plate and the rear end plate.

8. The battery pack of claim 6, wherein the battery pack comprises a plurality of battery cells,

the buffer layer is arranged between the front end plate and the rear end plate and the battery cell.

9. The battery pack of claim 6, wherein the battery pack comprises a plurality of battery cells,

the buffer layer is arranged between adjacent electric cores.

10. The battery pack of claim 6, wherein the battery pack comprises a plurality of battery cells,

the bottom supporting plate is provided with a first fixing strip and a second fixing strip;