CN113206321B

CN113206321B - Battery module

Info

Publication number: CN113206321B
Application number: CN202110481247.XA
Authority: CN
Inventors: 罗兰
Original assignee: Mecaplast Auto Parts Shanghai Co ltd
Current assignee: Mecaplast Auto Parts Shanghai Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2022-12-30
Anticipated expiration: 2041-04-30
Also published as: CN113206321A

Abstract

The invention provides a battery module, which comprises a shell and a battery cell arranged in the shell, and is characterized by further comprising an upper cooling plate and a lower cooling plate which are respectively contacted with the upper surface and the lower surface of the battery cell. The upper side and the lower side of the battery cell are respectively cooled by the two cooling plates, so that the battery cell has better temperature consistency, the thermal runaway probability of the battery is obviously reduced, and the service life of the battery is prolonged.

Description

Battery module

Technical Field

The invention relates to the field of automobile batteries, in particular to a battery module.

Background

At present, a battery pack cooling system generally adopts a structure that a battery module is placed on a cooling plate, and the cooling plate cools only one side of the battery module. Such cooling has a number of drawbacks: 1. in any battery module, because the batteries are cooled from bottom to top, the temperature of the battery area close to the cooling plate is lower than that of the battery area far away from the cooling plate, the maximum temperature difference of a single battery is generally within 3 ℃, and the traditional cooling plate is difficult to meet the requirements. 2. The conventional cooling plate is formed by stamping and then vacuum brazing an aluminum plate, a cooling channel is generally simple, and the whole surface area of the cooling plate cannot be utilized to the maximum extent.

Disclosure of Invention

The invention aims to provide a battery module with more uniform cooling

The invention solves the technical problem by the following modes:

a battery module comprises a shell and a battery cell arranged in the shell, and is characterized by further comprising an upper cooling plate and a lower cooling plate which are respectively in contact with the upper surface and the lower surface of the battery cell.

The upper side and the lower side of the battery cell are respectively cooled by the two cooling plates, so that the battery cell has better temperature consistency, the thermal runaway probability of the battery is obviously reduced, and the service life of the battery is prolonged.

As a preferred embodiment of the present invention, the casing includes side plates located at two sides, and a front frame and a rear frame connected to the front and rear ends of the side plates, the upper and lower ends of the casing have openings, the upper cooling plate and the lower cooling plate are fixed to the openings at the upper and lower ends of the casing, the front frame is provided with a front end cover, the rear frame is provided with a rear end cover, and the battery cell is enclosed between the side plates, the front frame, the rear frame, the front end cover and the rear end cover. Therefore, a closed design is realized, and the explosion-proof performance can be improved.

In a preferred embodiment of the present invention, the upper cooling plate and the lower cooling plate have the same structure, and include a cover plate, a sealing frame, and a bottom plate, the cover plate has a recessed cavity on a bottom surface thereof and a placement groove disposed around the cavity, the top surface has an inlet and an outlet communicating with the cavity, the sealing frame is disposed in the placement groove, the sealing frame has a slot on an inner surface thereof, the bottom plate is inserted into the slot, and the cover plate, the bottom plate, and the sealing frame together form a chamber for receiving a cooling fluid. The cooling liquid is introduced into the chamber through the inflow port and flows out of the outflow port, so that the cooling effect is realized.

In a preferred embodiment of the present invention, the upper and lower edges of the front and rear frames are higher than the upper and lower edges of the side plates, and the cover plates of the upper and lower cooling plates have a covering edge adapted to the protruding outer portions of the front and rear frames. So as to coat the battery core in the shell.

As a preferred embodiment of the invention, the inner walls of the side plates are provided with protruding ribs, and the battery cell is clamped between the protruding ribs of the two side plates, so that the battery cell is limited.

In a preferred embodiment of the present invention, a plurality of bumps are integrally formed on the top wall of the inner cavity of the cover plate, and the bottom ends of the bumps abut against the bottom plate, so that the compressive strength of the cooling plate is greatly improved.

In conclusion, the battery module has the advantages of uniform cooling and high cooling efficiency, greatly reduces the probability of thermal runaway of the battery, and prolongs the service life of the battery.

Drawings

The invention will be further described with reference to the accompanying drawings in which:

fig. 1 is an exploded view of the present battery module;

FIG. 2 is a perspective view of the main frame;

fig. 3 is a sectional view of the present battery module;

FIG. 4 is a partial enlarged view of portion A of FIG. 3;

FIG. 5 is a top view of the upper cooling plate;

FIG. 6 isbase:Sub>A cross-sectional view taken along plane A-A of the upper cooling plate;

FIG. 7 is a partial enlarged view of portion B of FIG. 6;

FIG. 8 is a bottom view of the cover plate;

wherein: 100-shell, 110-side plate, 111-connecting column, 112-protruding rib, 120-front frame, 121-mounting part, 130-rear frame, 200-battery core, 201-electrode, 300-upper cooling plate, 310-cover plate, 311-cavity, 312-inflow port, 313-outflow port, 314-placing groove, 315-salient point, 320-bottom plate, 330-sealing frame, 331-slot, 340-edge covering, 400-lower cooling plate, 500-front end cover, 510-sealing ring groove, 511-sealing ring and 600-rear end cover.

Detailed Description

The invention is further illustrated by the following specific examples:

as shown in fig. 1, a battery module includes a housing 100, a battery cell 200, an upper cooling plate 300, a lower cooling plate 400, a front end cap 500, and a rear end cap 600.

Referring to fig. 1 and 2, the casing 100 includes side plates 110 at both sides, a front frame 120 and a rear frame 130 connecting front and rear ends of the side plates 110, and the casing 100 has openings at upper and lower ends thereof.

A plurality of connection posts 111 are spaced apart on top and bottom edges of the side plates 110, and the upper and

lower cooling plates

300 and 400 are fixed to openings at upper and lower ends of the case 100, respectively, by screws penetrating the upper and

lower cooling plates

300 and 400 and screwed into the connection posts 111.

As shown in fig. 3 and 4, recessed mounting portions 121 are provided on end surfaces of the front frame 120 and the rear frame 130. The front cover 500 and the rear cover 600 are fixed in the mounting portions 121 of the front frame 120 and the rear frame 130, respectively. The inner surfaces of the front and

rear caps

500 and 600 are provided with a seal ring groove 510 along the circumferential direction, a seal ring 511 is provided in the seal ring groove 510, and the seal ring 511 abuts against the end surface of the mounting portion 121, thereby achieving the sealed fixation of the front and

rear caps

500 and 600.

Referring to fig. 1, an electrode 201 is mounted at one end of a battery cell 200, and the battery cell 200 is disposed in a casing 100 and enclosed between a side plate 110, a front end cap 500, a rear end cap 600, an upper cooling plate 300, and a lower cooling plate 400. The upper and lower surfaces of the battery cell 200 are in contact with the upper cooling plate 300 and the lower cooling plate 400, respectively. The upper side and the lower side of the battery cell 200 are respectively cooled by the two cooling plates, so that the battery cell 200 has better temperature consistency, the thermal runaway probability of the battery is obviously reduced, and the service life of the battery is prolonged.

As shown in fig. 2, a protruding rib 112 for reinforcement is disposed on an inner wall of the side plate 110, and two side surfaces of the battery cell 200 are clamped by the protruding rib 112 on the side plate 110, so as to limit the battery cell 200. And a certain gap can exist between the battery cell 200 and the side plate 110, so that the heat dissipation effect is improved.

As shown in fig. 5 to 7, the upper cooling plate 300 and the lower cooling plate 400 have the same structure, and include a cover plate 310, a bottom plate 320, and a sealing frame 330. The cover plate 310 has a recessed cavity 311 on the inner surface thereof, and an inflow port 312 and an outflow port 313 on the outer surface thereof, which are connected to the cavity 311. The bottom surface of the cover plate 310 is further provided with a placement groove 314 disposed around the cavity 311, the sealing frame 330 is disposed in the placement groove 314, a lateral insertion groove 331 is disposed on the inner side surface of the sealing frame 330, and the bottom plate is inserted into the insertion groove 331. The cover plate 310, the base plate 320 and the sealing frame 330 together form a chamber for receiving a cooling fluid.

When the cooling device is used, cooling liquid is injected into a cavity between the bottom plate 320 and the cover plate 310 from the inflow port, heat on the bottom plate is taken away, and the cooling liquid is discharged from the outflow port 313, so that the battery cell 200 is cooled.

With reference to fig. 7 and 8, the injection-molded bumps 315 are uniformly disposed on the top wall of the cavity 311 of the cover plate 310, and the bottom ends of the bumps 315 are abutted against the bottom plate 320 to support and improve the supporting strength of the cooling plate. In addition, the bumps 315 can make a chamber formed by the bottom plate 320, the sealing frame 330 and the cover plate 310 be a very small partition, and when the cooling liquid flows through the bumps 315, the flowing direction and the flowing speed of the cooling liquid can be changed, so that the utilization rate of each area in the cooling channel can be improved to the maximum extent, and the cooling efficiency of the battery cell can be improved.

The upper and lower edges of the front frame 120 and the rear frame 130 are higher than the upper and lower edges of the side plate 110, and the front and rear ends of the cover plates of the upper cooling plate 300 and the lower cooling plate 400 are provided with covered edges 340 adapted to the outer parts of the front frame 120 and the rear frame 130 protruding out of the side plate, so as to cover the battery cell 200 in the casing 100, reduce heat convection and improve heat dissipation efficiency.

However, those skilled in the art should recognize that the above-described embodiments are illustrative only, and not limiting, and that changes and modifications to the above-described embodiments are intended to be included within the scope of the appended claims, which are within the true spirit of the invention.

Claims

1. A battery module comprises a shell (100), a battery cell (200) arranged in the shell (100), and an upper cooling plate (300) and a lower cooling plate (400) which are respectively contacted with the upper surface and the lower surface of the battery cell (200), and is characterized in that the upper cooling plate (300) and the lower cooling plate (400) have the same structure and comprise a cover plate (310), a sealing frame (330) and a bottom plate (320), the bottom surface of the cover plate (310) is provided with an inwards-recessed cavity (311) and a placing groove (314) arranged around the cavity (311), the top surface of the cover plate is provided with an inflow port (312) and an outflow port (313) which are communicated with the cavity (311), the sealing frame (330) is arranged in the placing groove (314), the inner side surface of the sealing frame (314) is provided with a slot (331), the bottom plate (320) is inserted into the slot (331), and the cover plate (310), the bottom plate (320) and the sealing frame (330) form a cavity for containing cooling liquid.

2. The battery module according to claim 1, wherein: a plurality of injection-molded integrally-formed salient points (315) are distributed on the top wall of the cavity (311) of the cover plate (310), and the bottom ends of the salient points (315) are abutted to the bottom plate (320).

3. The battery module according to claim 2, wherein: the shell (100) comprises side plates (110) positioned on two sides, and a front frame (120) and a rear frame (130) which are connected with the front end and the rear end of the side plates (110), wherein openings are formed in the upper end and the lower end of the shell (100), the upper cooling plate (300) and the lower cooling plate (400) are fixed at the openings in the upper end and the lower end of the shell (100), the upper edge and the lower edge of the front frame (120) and the lower edge of the rear frame (130) are higher than the upper edge and the lower edge of the side plates (110), and cover plates (310) of the upper cooling plate (300) and the lower cooling plate (400) are provided with covered edges (340) which are matched with the outer parts, protruding out of the side plates (110), of the front frame (120) and the rear frame (130).

4. The battery module according to claim 3, wherein: the battery cell is characterized in that a front end cover (500) is installed at the front frame (120), a rear end cover (600) is installed at the rear frame (130), and the battery cell (200) is sealed among the side plate (110), the front end cover (500), the rear end cover (600), the upper cooling plate (300) and the lower cooling plate (400).