CN211605216U

CN211605216U - Battery module casing and battery module

Info

Publication number: CN211605216U
Application number: CN201922327136.4U
Authority: CN
Inventors: 王斌斌; 刘丽荣; 郭伟华; 刘献华; 曾文彬; 邬亨英
Original assignee: Farasis Energy Ganzhou Co Ltd; Farasis Energy Zhenjiang Co Ltd
Current assignee: Farasis Energy Ganzhou Co Ltd; Farasis Energy Zhenjiang Co Ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-09-29
Anticipated expiration: 2029-12-20

Abstract

The utility model relates to a battery technology field specifically relates to a battery module casing and battery module. The battery module shell comprises a shell body, a cavity for installing the battery module is formed in the shell body, and a flow channel structure for heat exchange is formed between the outer wall surface of the shell body and the inner wall surface of the shell body. The battery module shell has the advantages of fewer used parts, material saving, smaller occupied space, convenience in disassembly and assembly and better liquid cooling and heating effects.

Description

Battery module casing and battery module

Technical Field

The utility model relates to a battery technology field specifically relates to a battery module casing and battery module.

Background

The main factor affecting the cell life utilization is temperature. In a battery system, the temperature of the battery cells at different positions in the charging and discharging process is different due to the difference of thermal environments. Therefore, the attenuation speed of the battery cell is different, the attenuation speed of the battery cell with high temperature is higher, the attenuation speed can lead to higher temperature, and then vicious circle is formed. Therefore, the temperature uniformity of the module must be improved to improve the utilization rate of the service life of the battery cell. In the prior art, after the module is assembled, liquid cooling plates are installed on the outer sides of a rear plate and a bottom plate of the module to cool liquid and heat. But above-mentioned scheme spare part is more, extravagant material, occupation of ratio space is great, module energy density is low, the dismouting is inconvenient, the cost of labor is high, and the liquid cooling effect is relatively poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the more, extravagant material of the part that the mode that exists among the prior art through the hot improvement electric core life-span of liquid cooling liquid used, account for than the space big, the inconvenient and relatively poor technical problem of the hot effect of liquid cooling liquid of dismouting. Therefore, the battery module shell and the battery module are fewer in used components, material is saved, the occupied space is smaller, the disassembly and the assembly are convenient, and the liquid cooling and liquid heating effects are better.

In order to achieve the above object, an aspect of the present invention provides a battery module casing, which includes a casing body, a cavity for installing a battery module is formed in the casing body, an outer wall surface of the casing body and a flow channel structure for heat exchange are formed between inner wall surfaces of the casing body.

Preferably, the flow channel structures are arranged in a plurality, and the flow channel structures are distributed in parallel at intervals.

Preferably, the flow channel structure is a strip-shaped flow channel.

Preferably, the interior of each flow channel structure is provided as a continuous passage.

Preferably, the head ends of the flow channel structures are communicated with each other, the tail ends of the flow channel structures are communicated with each other, and the shell body is provided with a flow channel inlet corresponding to the head end and a flow channel outlet corresponding to the tail end.

Preferably, the shell body includes back plate, left end board and right end board, the both ends of back plate respectively with the left end board and the right end board is connected, the runner structure including communicate each other formed in the inside first runner of back plate, formed in the inside second runner of left end board and formed in the inside third runner of right end board.

Preferably, two ends of the rear plate, which are used for being connected with the left end plate and the right end plate, are respectively provided with a connecting part which is used for being embedded in the second flow channel and the third flow channel, the connecting part protrudes out of the inner wall surface of the rear plate, and a channel communicated with the first flow channel is formed inside the connecting part.

Preferably, the connection part and the connection parts of the second flow passage and the third flow passage are provided with sealing structures.

Preferably, a plurality of heat conducting plates arranged at intervals are arranged in the chamber.

A second aspect of the present invention provides a battery module, which includes the battery module housing and the battery module disposed in the cavity.

Through the technical scheme, the flow channel structure for heat exchange is integrated in the shell body, no additional liquid cooling plate is required to be arranged, the structure is simple, the used parts are fewer, and materials are saved, so that the shell of the battery module not only plays a role in fixing, but also plays a role in liquid cooling and liquid heating; the module placing space can be reduced, the light weight is greatly improved, and the energy density of the module is increased; the assembly process is reduced, the disassembly and the assembly are more convenient, the production efficiency is greatly improved, and the cost is reduced; meanwhile, the battery core is more direct in heat transfer and cold transfer with the liquid cooling plate, the liquid cooling and liquid heating effect is more obvious, the consistency of the battery core temperature can be better realized, and the service life of the battery is prolonged.

Drawings

Fig. 1 is a partial structural schematic view of an embodiment of a battery module housing according to the present invention;

fig. 2 is another angular structure view of the battery module case shown in fig. 1;

fig. 3 is another angular structure view of the battery module case shown in fig. 1;

fig. 4 is a partial structural view of the battery module case shown in fig. 1;

fig. 5 is a side view of a partial structure of the battery module case shown in fig. 4;

fig. 6 is a partial structural view of a rear plate in the battery module case shown in fig. 1;

fig. 7 is another partial structural view of a rear plate in the battery module case shown in fig. 1.

Description of the reference numerals

1-a rear plate; 2-left end plate; 3-right end plate; 4-a heat-conducting plate; 5-liquid cooling joint; 6-a second flow channel; 7-a connecting part; 8-channel; 9-first flow channel.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

In the present invention, unless otherwise specified, the terms of orientation such as "left and right" are generally used in accordance with the orientation shown in the drawings.

As shown in fig. 1-7, an aspect of the present invention provides a battery module casing, the battery module casing includes a housing, a cavity for installing a battery module is formed in the housing, and a flow channel structure for heat exchange is formed between an outer wall surface of the housing and an inner wall surface of the housing. Namely, the flow passage structure is a hollow structure formed inside the housing body. In practical application, the battery module comprises a plurality of electric core groups, and each electric core group comprises a plurality of stacked electric cores. The runner structure is used for introducing heat exchange liquid to cool and heat the battery module, so that the temperature consistency of the battery module is ensured.

The flow channel structure for heat exchange is integrated in the shell body, no additional liquid cooling plate is needed, the structure is simple, the used parts are fewer, and materials are saved, so that the shell of the battery module not only plays a role in fixing, but also plays a role in liquid cooling and liquid heating; the arrangement space of the battery module can be reduced, the light weight is greatly improved, and the energy density of the battery module is increased; the assembly process is reduced, the disassembly and the assembly are more convenient, the production efficiency is greatly improved, and the cost is reduced; meanwhile, the battery core is more direct in heat transfer and cold transfer with the liquid cooling plate, the liquid cooling and liquid heating effect is more obvious, the consistency of the battery core temperature can be better realized, and the service life of the battery is prolonged.

In one embodiment, the flow channel structure is provided in a plurality, and the plurality of flow channel structures are arranged in parallel and spaced apart. The design can lead the two adjacent flow channel structures to be separated through the solid part, thereby enhancing the structural performance of the shell body and leading the shell body to be firmer on the premise that the flow channel structure inside the shell body realizes the liquid cooling and liquid heating. As shown in fig. 4, 5 and 7, the flow channel structures are provided in three.

In one embodiment, the flow channel structure is a strip-shaped flow channel. As shown in fig. 4, the stripe structures are arranged in the lateral direction. Preferably, a plurality of strip-shaped flow channel structures are arranged in parallel. In practical application, the flow channel structure can also be a bent flow channel or other flow channels with irregular shapes as long as a better liquid-hot-liquid cooling effect can be realized.

In one embodiment, the interior of each flow channel structure is provided as a continuous channel. That is, the internal passage of each flow channel structure is uninterrupted, so that the flow channel inlet and the flow channel outlet are only arranged at the head end and the tail end of the flow channel structure, and the heat exchange liquid continuously flows from the head end of each flow channel structure to the tail end of the flow channel structure. Therefore, continuous heat exchange can be carried out on different areas covered by one flow channel structure, and extra flow channel inlets and flow channel outlets do not need to be arranged in the middle of the flow channel structure.

As an embodiment, the head end of each of the flow channel structures is set to be communicated with each other, the tail end of each of the flow channel structures is set to be communicated with each other, and the shell body is provided with a flow channel inlet corresponding to the head end and a flow channel outlet corresponding to the tail end. The flow channel inlet and the flow channel outlet are respectively arranged on the outer wall surface of the shell body. And the flow passage inlet and the flow passage outlet are respectively provided with a liquid cooling joint 5. The design can enable the plurality of flow channel structures to share one flow channel inlet and one flow channel outlet, in practical application, heat exchange liquid enters the shell body from the flow channel inlets, then the heat exchange liquid is divided at the head end and enters the interior of each flow channel structure respectively to exchange heat for the battery modules, and finally the heat exchange liquid is collected at the tail end of each flow channel structure and flows out from the flow channel outlets. The design structure is simple and the operation is convenient.

As an embodiment, as shown in fig. 1-2, the case body includes a back plate 1, a left end plate 2 and a right end plate 3, two ends of the back plate 1 are respectively connected to the left end plate 2 and the right end plate 3, and the flow channel structure includes a first flow channel 9 formed inside the back plate 1, a second flow channel 6 formed inside the left end plate 2, and a third flow channel formed inside the right end plate 3, which are communicated with each other. The left end plate 2 is arranged opposite to the right end plate 3. The shell body further comprises a front plate (not shown in the figure), a top plate and a bottom plate, wherein the front plate is arranged at the front end of the shell body and is opposite to the rear plate 1, the top plate is arranged at the top end of the shell body, and the bottom plate is arranged at the bottom end of the shell body and is opposite to the top plate. The front plate, the rear plate 1, the top plate, the bottom plate, the left end plate 2, and the right end plate 3 together form a chamber for mounting the battery module. The front plate is arranged corresponding to the polar lugs of the battery module, and the top plate and the bottom plate are arranged corresponding to the two electric cores positioned on the outermost layer of the electric core group respectively. The flow channel structure is arranged in the rear plate 1, the left end plate 2 and the right end plate 3, so that the battery module can be heated more uniformly, the arrangement in the top plate and the bottom plate is avoided, and the situation that a large temperature difference is generated between the electric core positioned on the outer layer of the electric core group and the electric core positioned in the inner part of the electric core group is realized. Preferably, the rear plate 1 is a 6mm extruded aluminum liquid cooling plate. And all the plates of the shell body are connected through locking screws respectively.

In one embodiment, two ends of the rear plate 1, which are connected to the left end plate 2 and the right end plate 3, are respectively provided with a connecting portion 7 for being inserted into the second flow channel 6 and the third flow channel, the connecting portion 7 is disposed to protrude from an inner wall surface of the rear plate 1, and a channel 8 communicating with the first flow channel 9 is formed inside the connecting portion 7. In practical applications, the shape of the connecting portion 7 only needs to be adapted to the end portions of the second flow passage 6 and the third flow passage, and the sealing performance of the connecting portion is ensured. Such a design makes it easier to ensure the sealing at the junction of the first flow channel 9 with the second flow channel 6 and the third flow channel. In practical applications, the connecting portion 7 may also be disposed on the left end plate 2 and the right end plate 3, as long as it can ensure that the first flow channel 9 can communicate with the second flow channel 6 and the third flow channel, and ensure the sealing property.

In one embodiment, the connection portion 7 is provided with a sealing structure at the connection portion with the second flow passage 6 and the third flow passage. Such a design may provide a better seal at the junction of the first flow passage 9 with the second flow passage 6 and the third flow passage.

In one embodiment, a plurality of heat conducting plates 4 are arranged at intervals in the chamber. The corresponding battery module includes a plurality of electric core groups, and adjacent two electric core groups are separated by the heat-conducting plate 4.

The utility model discloses the second aspect provides a battery module, battery module include as above battery module casing and set up in the inside battery module of cavity. The battery module comprises a plurality of battery cell groups (not shown in the figure), and each battery cell group comprises a plurality of stacked battery cells.

The battery module carries out liquid cooling liquid heat through set up the runner structure in that the shell body is inside, optimizes the electric motor car in the use to the requirement of battery module temperature uniformity to let battery life extension. The battery module assembly structure with the design is simple, the material cost is reduced, the occupied space of the battery module is reduced, the energy density of a battery system is improved, the liquid cooling and liquid heating effects are more obvious, the assembly and disassembly are more convenient and rapid, and the labor cost is reduced. With the inside runner structure that sets up of left end board 2, right-hand member board 3 and back plate 1, assurance liquid cooling liquid thermal effect that can be better realizes the uniformity of electric core temperature, the life of extension battery. The battery module shell of the battery module is simple in structure and obvious in assembly and cost advantages.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. The technical idea of the utility model within the scope, can be right the utility model discloses a technical scheme carries out multiple simple variant, for example, can only set up runner structure etc. in backplate 1 inside. Including various specific features, are combined in any suitable manner, such as by correspondingly combining the battery module with various embodiments in the battery module housing, etc. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

Claims

1. The utility model provides a battery module casing, its characterized in that, includes the shell body, this internal cavity that is used for installing battery module that is formed with of shell, the outer wall of shell body with be formed with the runner structure that is used for the heat transfer between the internal face of shell body, the shell body includes back plate (1), left end board (2) and right-hand member board (3), the both ends of back plate (1) respectively with left end board (2) and right end board (3) are connected, the runner structure including communicate each other be formed with in inside first runner (9) of back plate (1), be formed with inside second runner (6) of left end board (2) and be formed with the inside third runner of right end board (3).

2. The battery module housing as claimed in claim 1, wherein the flow channel structure is provided in plurality, and the plurality of flow channel structures are arranged in parallel and spaced apart.

3. The battery module housing of claim 2, wherein the flow channel structure is a strip-shaped flow channel.

4. The battery module housing of claim 2, wherein the interior of each flow channel structure is provided as a continuous passageway.

5. The battery module housing as recited in claim 4, wherein the head end of each of the flow channel structures is configured to communicate with each other, the tail end of each of the flow channel structures is configured to communicate with each other, and the housing body is provided with a flow channel inlet corresponding to the head end and a flow channel outlet corresponding to the tail end.

6. The battery module housing according to any one of claims 1 to 5, wherein two ends of the rear plate (1) for connecting with the left end plate (2) and the right end plate (3) are respectively provided with a connecting part (7) for being embedded in the second flow channel (6) and the third flow channel, the connecting part (7) is arranged to protrude from the inner wall surface of the rear plate (1), and a channel (8) communicated with the first flow channel (9) is formed inside the connecting part (7).

7. The battery module case according to claim 6, wherein the connection parts (7) are provided with sealing structures at the connection points with the second flow channel (6) and the third flow channel.

8. The battery module case according to claim 1, wherein the chamber is internally provided with a plurality of heat-conducting plates (4) arranged at intervals.

9. A battery module comprising the battery module case according to any one of claims 1 to 8 and a battery module disposed inside the chamber.