CN219801009U

CN219801009U - Integrated liquid cooling device and battery system

Info

Publication number: CN219801009U
Application number: CN202320801925.0U
Authority: CN
Inventors: 王松
Original assignee: Chuneng New Energy Co Ltd
Current assignee: Chuneng New Energy Co Ltd
Priority date: 2023-04-07
Filing date: 2023-04-07
Publication date: 2023-10-03
Anticipated expiration: 2033-04-07

Abstract

The utility model provides an integrated liquid cooling device and a battery system, and belongs to the technical field of new energy batteries. The integrated liquid cooling device comprises a mounting plate body and a liquid cooling pipe. The mounting plate body has the inner chamber, is provided with a plurality of wallboards in the inner chamber, and a plurality of wallboards parallel interval arrangement forms the runner that extends along the length direction of mounting plate between the adjacent wallboard, and the mounting plate body is provided with first water inlet and the first delivery port of communicating with the inner chamber in length direction's one end, and the mounting plate body is provided with second water inlet and the second delivery port of communicating with the inner chamber in length direction's the other end. The liquid cooling pipe is arranged in the inner cavity and coiled in the plurality of flow channels, and two ends of the liquid cooling pipe are respectively connected with the first water inlet and the first water outlet. The integrated liquid cooling device can effectively improve the heat dissipation and temperature equalization effect on the stacked long battery cell modules, and improve the prevention capability on thermal runaway accidents.

Description

Integrated liquid cooling device and battery system

Technical Field

The utility model relates to the technical field of new energy batteries, in particular to an integrated liquid cooling device and a battery system.

Background

In the field of new energy batteries, in order to improve the cruising ability, different numbers of electric cores are often required to be connected in series-parallel to form an electric core module so as to provide corresponding voltage or current for a load end. When the battery core module works, the temperature rise of the battery is too high due to high-rate charge and discharge, so that the performance, the service life and the like of the battery are affected, and if the temperature rise is not effectively treated, even thermal runaway is possibly caused, so that the life safety of a user is endangered. Therefore, the cell module needs to be designed with the heat dissipation and the temperature reduction in a targeted manner so as to ensure the normal work and prolong the service life.

In the related art, for a battery cell module in a square aluminum shell battery, a liquid cooling plate formed by extruding or stamping brazing is generally arranged at the bottom of a battery cell arranged in parallel, an external water supply pipeline is connected with a water inlet and a water outlet of the liquid cooling plate to form cooling water circulation, and cooling water flowing in a runner in the liquid cooling plate is used for exchanging heat with the battery cell to realize heat dissipation and temperature equalization.

Adopt the cooling method among the correlation technique, to the long electric core module that is range upon range of by a plurality of monomer electric cores, the liquid cooling board that is located the below also needs corresponding extension to set up, and the stroke of cooling water in the liquid cooling board is longer, and the temperature rise along with cooling water leads to front and back section radiating effect inequality, after the heat transfer of anterior segment, the cooling water after the temperature rise is difficult to conduct the temperature rise that the electric core that follow-up contacted produced fast, and the aforesaid defect among the correlation technique leads to the heat dissipation samming effect of current electric core module relatively poor.

Disclosure of Invention

The embodiment of the utility model provides an integrated liquid cooling device and a battery system, which can effectively improve the heat dissipation and temperature equalization effect on stacked long battery cell modules and improve the capability of preventing thermal runaway accidents. The technical scheme is as follows:

in a first aspect, an embodiment of the present utility model provides an integrated liquid cooling apparatus, including: a mounting plate body and a liquid cooling pipe,

the mounting plate body is provided with an inner cavity, a plurality of wall plates are arranged in the inner cavity at intervals in parallel, a flow channel extending along the length direction of the mounting plate is formed between the adjacent wall plates, one end of the mounting plate body in the length direction is provided with a first water inlet and a first water outlet which are communicated with the inner cavity, the other end of the mounting plate body in the length direction is provided with a second water inlet and a second water outlet which are communicated with the inner cavity,

the liquid cooling pipe is arranged in the inner cavity and coiled in the flow channels, and two ends of the liquid cooling pipe are respectively connected with the first water inlet and the first water outlet.

Optionally, the mounting plate body is provided with the installation roof beam in the both sides of length direction, be provided with box flange along length direction interval on the installation roof beam.

Optionally, the distance between the top end surface of the mounting beam and the bottom surface of the mounting plate body is greater than the distance between the top surface and the bottom surface of the mounting plate body.

Optionally, the integrated liquid cooling device further includes a plurality of spacing crossbeams, the both ends of spacing crossbeam respectively with two the installation roof beam is connected, a plurality of spacing crossbeams are followed the length direction interval arrangement of the mounting panel body.

Optionally, a plurality of bolt connection holes are formed in the limiting beam.

Optionally, two opposite end surfaces of the mounting beam are respectively provided with a strip-shaped assembly groove, the strip-shaped assembly grooves are arranged along the length direction of the mounting beam, and two ends of the limiting beam are provided with assembly protrusions matched with the strip-shaped assembly grooves.

Optionally, a cavity is provided inside the mounting beam.

Optionally, the mounting plate body includes first plate body and the second plate body of following central line symmetry arrangement, the mounting plate body by first plate body with the second plate body is involution splice welded.

Optionally, the mounting plate body is an aluminum profile structural member.

In a second aspect, an embodiment of the present utility model further provides a battery system, including the integrated liquid cooling device of the first aspect, and further including a battery core module, where the battery core module is formed by stacking a plurality of single battery cores along a length direction of the mounting plate body, and the battery core module is fixedly connected to a top surface of the mounting plate body through a heat conductive adhesive.

The technical scheme provided by the embodiment of the utility model has the beneficial effects that at least:

when the battery cell module performs charge and discharge operation, cooling liquid can be injected into the inner cavity of the mounting plate body through the second water inlet, so that a plurality of flow channels in the inner cavity are filled with the cooling liquid, and the cooling liquid is discharged through the second water outlet to realize a set of cooling circulation. Simultaneously, cooling liquid is injected into the liquid cooling pipe through the first water inlet and is discharged through the first water outlet, so that another set of cooling circulation is realized. When the battery cell module generates heat due to working, the generated heat can be subjected to primary heat exchange with the cooling liquid in the flow channel with a large quantity of inner cavities preferentially, and the cooling liquid with lower temperature in the liquid cooling pipe can be subjected to further heat exchange with the cooling liquid in the flow channel. The liquid cooling structure adopting two-stage heat exchange is adopted, the primary heat exchange is carried out through the cooling liquid of the flow passage in the inner cavity with a larger contact surface, and the problem that the heat dissipation effect of the front section and the rear section is uneven along with the temperature rise of the cooling water due to long stroke caused by heat exchange and temperature equalization of the cooling liquid in the liquid cooling pipe can be avoided. The heat dissipation and temperature equalization effect on the stacked long battery cell modules can be effectively improved, and the prevention capability on thermal runaway accidents is improved.

Drawings

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

FIG. 1 is a schematic perspective view of an integrated liquid cooling device according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a three-dimensional structure of an integrated liquid cooling device according to an embodiment of the present utility model;

FIG. 3 is a schematic view of the internal structure of a mounting plate body of an upper plate body according to an embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of a first plate according to an embodiment of the present utility model;

FIG. 5 is an enlarged schematic view of a part of the structure of FIG. 2;

fig. 6 is a schematic perspective view of a battery system according to an embodiment of the present utility model.

In the figure:

1-a mounting plate body; 1 a-flow channel; 1 b-a first plate body; 1 c-a second plate; 2-a liquid-cooled tube; 3-a cell module; 11-a wall plate; 12-a first water inlet; 13-a first water outlet; 14-a second water inlet; 15-a second water outlet; 16-mounting beams; 17-limiting cross beams; 31-a single cell; 161-connecting flanges; 162-bar assembly groove; 163-cavity; 171-bolt connection holes; 172-fitting projections.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the embodiments of the present utility model will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic perspective view of an integrated liquid cooling device according to an embodiment of the present utility model. Fig. 2 is an exploded view of a three-dimensional structure of an integrated liquid cooling device according to an embodiment of the present utility model. Fig. 3 is a schematic diagram of an internal structure of a mounting plate body of an upper plate body according to an embodiment of the present utility model. Fig. 4 is a schematic cross-sectional view of a first plate according to an embodiment of the present utility model. Fig. 5 is an enlarged schematic view of a partial structure in fig. 2. As shown in fig. 1 to 5, the present inventors have provided, through practice, an integrated liquid cooling apparatus including a mounting plate body 1 and a liquid cooling pipe 2.

The mounting plate body 1 is provided with an inner cavity, a plurality of wall plates 11 are arranged in the inner cavity in parallel at intervals, and a flow channel 1a extending along the length direction of the mounting plate is formed between the adjacent wall plates 11. One end of the mounting plate body 1 in the length direction is provided with a first water inlet 12 and a first water outlet 13 which are communicated with the inner cavity, and the other end of the mounting plate body 1 in the length direction is provided with a second water inlet 14 and a second water outlet 15 which are communicated with the inner cavity.

The liquid cooling pipe 2 is arranged in the inner cavity and coiled in the plurality of flow channels 1a, and two ends of the liquid cooling pipe 2 are respectively connected with the first water inlet 12 and the first water outlet 13.

In the embodiment of the utility model, the mounting plate body 1 of the integrated liquid cooling device can be mounted on the body weight of the battery box, and the battery cell module can be mounted on the top surface of the mounting plate body 1 and is adhered and fixed through the heat conduction structural adhesive during mounting. Meanwhile, a first water inlet 12 and a first water outlet 13 which are positioned at one end of the mounting plate body 1 are connected with one set of cooling water circulation system, and a second water inlet 14 and a second water outlet 15 which are positioned at the other end of the mounting plate body 1 are connected with the other set of cooling water circulation system. The liquid cooling pipes 2 are repeatedly coiled among the plurality of flow passages 1a along the U shape, wherein the total number of the parallel flow passages 1a is more than that of the flow passages through which the liquid cooling pipes 2 pass, so that the heat exchange effect is ensured, the process difficulty is reduced, and the processing cost is reduced.

When the battery cell module performs charge and discharge operation, cooling liquid can be injected into the inner cavity of the mounting plate body 1 through the second water inlet 14, so that a plurality of flow channels 1a in the inner cavity are filled with the cooling liquid, and the cooling liquid is discharged through the second water outlet 15 to realize a set of cooling circulation. Simultaneously, cooling liquid is injected into the liquid cooling pipe 2 through the first water inlet 12 and is discharged through the first water outlet 13, so that another set of cooling circulation is realized. When the battery cell module generates heat due to working, the generated heat can be subjected to primary heat exchange with the cooling liquid in the flow channel 1a with a large quantity in the inner cavity preferentially, and the cooling liquid with a lower temperature in the liquid cooling pipe 2 can be subjected to further heat exchange with the cooling liquid in the flow channel 1a. The liquid cooling structure adopting two-stage heat exchange is adopted, the primary heat exchange is carried out through the cooling liquid of the flow channel 1a in the inner cavity with a larger contact surface, and the problem that the heat dissipation effect of the front section and the rear section is uneven along with the temperature rise of the cooling water due to longer stroke caused by heat exchange and temperature equalization only through the cooling liquid in the liquid cooling pipe 2 can be avoided. The heat dissipation and temperature equalization effect on the stacked long battery cell modules can be effectively improved, and the prevention capability on thermal runaway accidents is improved.

Alternatively, the mounting plate body 1 is provided with mounting beams 16 on both sides in the longitudinal direction, and the mounting beams 16 are provided with case connecting flanges 161 at intervals in the longitudinal direction. Illustratively, in the embodiment of the present utility model, after the mounting plate body 1 is set in place in the battery box, the mounting plate body may be aligned with the mounting holes in the battery box through the connection flanges 161 on the mounting beams 16 on both sides, and screwed into the bolts for fixing connection, and the connection points on both sides are set uniformly and tightly, so as to ensure the assembly stability.

Alternatively, the spacing between the top end surface of the mounting beam 16 and the bottom surface of the mounting plate body 1 is larger than the spacing between the top surface and the bottom surface of the mounting plate body 1. Illustratively, in the embodiment of the present utility model, the top end surfaces of the mounting beams 16 located on both sides of the mounting plate body 1 are higher than the top surface of the mounting plate body 1. The higher mounting beams 16 on the two sides and the mounting plate body 1 form a groove-shaped structure with a U-shaped section. The opposite end surfaces of the two mounting beams 16 can limit the cell module mounted on the mounting plate body 1 so as to improve the assembly stability of the cell module.

Optionally, the integrated liquid cooling device further comprises a plurality of limiting beams 17, two ends of each limiting beam 17 are respectively connected with the two mounting beams 16, and the limiting beams 17 are arranged at intervals along the length direction of the mounting plate body 1. Illustratively, in the present embodiment, a plurality of spacing beams 17 are welded between two mounting beams 16 at intervals along the length of the mounting plate body 1. Independent mounting grooves for limiting the single cell module can be defined between the adjacent limiting beams 17, so that corresponding limiting and pressing of a plurality of cell modules are realized, and the assembly stability of the integrated liquid cooling device is further improved.

Optionally, a plurality of bolt connection holes 171 are provided on the limiting beam 17. Illustratively, in the embodiment of the present utility model, the limiting beam 17 is provided with a plurality of bolt connection holes 171 at intervals along the length direction, and the long battery cell module generally includes a plurality of stacked single battery cells, and two sides of the long battery cell module are fixed by end plates. After the cell module is correspondingly installed in the independent installation groove defined by the two adjacent limiting beams 17, the bolt installation holes arranged on the end plates on the two sides of the cell module correspond to the bolt connection holes 171 on the limiting beams 17. At the moment, the two side end plates of the battery cell module can be fixedly connected with the limiting cross beam 17 through bolts, so that the assembly stability of the battery cell module is further improved.

Optionally, strip-shaped assembly grooves 162 are formed in opposite end surfaces of the two mounting beams 16, the strip-shaped assembly grooves 162 are arranged along the length direction of the mounting beams 16, and assembly protrusions 172 matched with the strip-shaped assembly grooves 162 are formed at two ends of the limiting cross beam 17. For example, in the embodiment of the utility model, when the integrated liquid cooling device is assembled, the two end assembling protrusions 172 of the limiting beam 17 may be respectively and correspondingly clamped into the bar-shaped assembling grooves 162 on the two mounting beams 16, then horizontally slid to the welding position along the length direction of the mounting plate body 1, and finally the clamped positions of the two end assembling protrusions 172 of the limiting beam 17 and the bar-shaped assembling grooves 162 are welded and fixed. The assembly positioning is convenient, and meanwhile, the welding area of the welding point position can be increased, and the structural stability of the integrated liquid cooling device is further improved.

Optionally, a cavity 163 is provided inside the mounting beam 16. Illustratively, in the embodiment of the present utility model, the mounting beam 16 adopts a hollow aluminum profile structure with a cavity 163, so that the weight of the integrated liquid cooling device can be reduced while the overall structural strength is ensured, the weight reduction of the whole battery pack box body is facilitated, and the battery pack box body has excellent corrosion resistance.

Optionally, the mounting plate body 1 comprises a first plate body 1b and a second plate body 1c which are symmetrically arranged along a central line, and the mounting plate body 1 is formed by butt-welding the first plate body 1b and the second plate body 1 c. In the embodiment of the utility model, the mounting plate body 1 is formed by butt welding two independent first plate bodies 1b and second plate bodies 1c, and the first plate bodies 1b and the second plate bodies 1c can be independently processed before being connected, so that internal processing and forming are convenient, the processing difficulty of integral processing is reduced, and the practicability is improved.

Fig. 6 is a schematic perspective view of a battery system according to an embodiment of the present utility model. As shown in fig. 6, the embodiment of the utility model further provides a battery system, which comprises the integrated liquid cooling device shown in fig. 1 to 5, and further comprises a battery core module 3, wherein the battery core module 3 is formed by stacking a plurality of single battery cores 31 along the length direction of the mounting plate body 1, and the battery core module 3 is fixedly connected to the top surface of the mounting plate body 1 through heat-conducting glue.

When the integrated liquid cooling device provided by the embodiment of the utility model is adopted, during charge and discharge operation of the battery cell module, cooling liquid can be injected into the inner cavity of the mounting plate body 1 through the second water inlet 14, so that a plurality of flow channels 1a in the inner cavity are filled with the cooling liquid, and the cooling liquid is discharged through the second water outlet 15 to realize a set of cooling circulation. Simultaneously, cooling liquid is injected into the liquid cooling pipe 2 through the first water inlet 12 and is discharged through the first water outlet 13, so that another set of cooling circulation is realized. When the battery core module 3 heats up due to operation, the heat generated will be preferentially subjected to primary heat exchange with the cooling liquid in the flow channel 1a with a large number of inner cavities, and the cooling liquid with a lower temperature in the liquid cooling tube 2 will be further subjected to further heat exchange with the cooling liquid in the flow channel 1a. The liquid cooling structure adopting two-stage heat exchange is adopted, the primary heat exchange is carried out through the cooling liquid of the flow channel 1a in the inner cavity with a larger contact surface, and the problem that the heat dissipation effect of the front section and the rear section is uneven along with the temperature rise of the cooling water due to longer stroke caused by heat exchange and temperature equalization only through the cooling liquid in the liquid cooling pipe 2 can be avoided. The heat dissipation and temperature equalization effect on the stacked long battery cell modules can be effectively improved, and the prevention capability on thermal runaway accidents is improved.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to denote relative positional relationships, which may also change accordingly when the absolute position of the object to be described changes.

The foregoing description of the preferred embodiments of the present utility model is not intended to limit the utility model, but rather, the utility model is to be construed as limited to the appended claims.

Claims

1. An integrated liquid cooling apparatus, comprising: a mounting plate body (1) and a liquid cooling pipe (2),

the mounting plate body (1) is provided with an inner cavity, a plurality of wall plates (11) are arranged in the inner cavity at intervals in parallel, a flow channel (1 a) extending along the length direction of the mounting plate is formed between the adjacent wall plates (11), one end of the mounting plate body (1) in the length direction is provided with a first water inlet (12) and a first water outlet (13) which are communicated with the inner cavity, the other end of the mounting plate body (1) in the length direction is provided with a second water inlet (14) and a second water outlet (15) which are communicated with the inner cavity,

the liquid cooling pipe (2) is arranged in the inner cavity and coiled in the flow channels (1 a), and two ends of the liquid cooling pipe (2) are respectively connected with the first water inlet (12) and the first water outlet (13).

2. The integrated liquid cooling device according to claim 1, wherein mounting beams (16) are provided on both sides of the mounting plate body (1) in the length direction, and case connecting flanges (161) are provided on the mounting beams (16) at intervals in the length direction.

3. The integrated liquid cooling device according to claim 2, characterized in that a distance between a top end surface of the mounting beam (16) and a bottom surface of the mounting plate body (1) is larger than a distance between a top surface and a bottom surface of the mounting plate body (1).

4. An integrated liquid cooling device according to claim 3, further comprising a plurality of limiting beams (17), wherein two ends of the limiting beams (17) are respectively connected with two mounting beams (16), and the limiting beams (17) are arranged at intervals along the length direction of the mounting plate body (1).

5. The integrated liquid cooling device according to claim 4, wherein a plurality of bolt connection holes (171) are formed in the limiting beam (17).

6. The integrated liquid cooling device according to claim 4, wherein strip-shaped assembly grooves (162) are formed in opposite end surfaces of the two mounting beams (16), the strip-shaped assembly grooves (162) are arranged along the length direction of the mounting beams (16), and assembly protrusions (172) matched with the strip-shaped assembly grooves (162) are formed at two ends of the limiting cross beam (17).

7. The integrated liquid cooling device of claim 2, wherein the mounting beam (16) is internally provided with a cavity (163).

8. The integrated liquid cooling device according to any one of claims 1 to 7, wherein the mounting plate body (1) comprises a first plate body (1 b) and a second plate body (1 c) which are symmetrically arranged along a central line, and the mounting plate body (1) is formed by butt welding the first plate body (1 b) and the second plate body (1 c).

9. The integrated liquid cooling device according to any one of claims 1 to 7, wherein the mounting plate body (1) is an aluminium profile structure.

10. A battery system comprising the integrated liquid cooling device according to any one of claims 1 to 7, further comprising a battery cell module (3), wherein the battery cell module (3) is formed by stacking a plurality of single battery cells (31) along the length direction of the mounting plate body (1), and the battery cell module (3) is fixedly connected to the top surface of the mounting plate body (1) through heat conducting glue.