CN218299933U

CN218299933U - Liquid cooling device and battery module

Info

Publication number: CN218299933U
Application number: CN202222189676.2U
Authority: CN
Inventors: 邱文聪; 陈智伟; 陈朝海; 李凡
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2023-01-13
Anticipated expiration: 2032-08-19

Abstract

The utility model belongs to the technical field of the battery, a liquid cooling device and battery module are disclosed. The liquid cooling device comprises a liquid cooling cover plate. The liquid cooling cover plate comprises a top plate, a bottom plate and side plates, and the top plate and the bottom plate are connected through the side plates to form a cavity. Be provided with the floor between roof and the bottom plate, the floor separates into a plurality of liquid cooling runners with the cavity, and the liquid cooling runner is used for the circulation coolant liquid. The liquid cooling device can reduce the use of parts in the battery module, thereby simplifying the assembly process and improving the production efficiency.

Description

Liquid cooling device and battery module

Technical Field

The utility model relates to a battery technology field especially relates to a liquid cooling device and battery module.

Background

In recent years, as new energy automobiles are developed very rapidly, the power battery is used as a main power source of the new energy automobiles, so that the driving mileage of the automobiles is determined, and the quality of the whole automobiles is influenced.

The battery module is the core of the battery pack. The battery module generally includes components such as electric core, electrically conductive connecting piece, plastic support, upper cover, liquid cold drawing. The structural design of the battery module requires that the whole body is resistant to vibration and fatigue, and the welding between the components is free from over-welding and insufficient welding, so that the battery module has good heat dissipation performance and can prevent the thermal runaway from spreading too fast. In the prior art, the assembly requirement of the battery module is high, the parts are various, and the assembly is complex, so that the production efficiency is low.

Therefore, it is desirable to provide a liquid cooling device and a battery module to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a liquid cooling device, this liquid cooling device can reduce the use of spare part in the battery module to simplify the assembly flow, improved production efficiency.

To achieve the purpose, the utility model adopts the following technical proposal:

liquid cooling device includes:

the liquid cooling cover plate comprises a top plate, a bottom plate and side plates, wherein the top plate and the bottom plate are connected through the side plates to form a cavity, rib plates are arranged between the top plate and the bottom plate, the rib plates divide the cavity into a plurality of liquid cooling flow passages, and the liquid cooling flow passages are used for circulating cooling liquid.

Optionally, a plurality of first through holes are formed in the top plate, a plurality of second through holes are formed in the bottom plate, the first through holes and the second through holes are arranged oppositely, the rib plate comprises a plurality of annular rib plates, and the annular rib plates communicate the first through holes and the second through holes to form assembly holes.

Optionally, the liquid cooling apron's below is provided with heat conduction structure and glues, the pilot hole can be used for injecting into heat conduction structure glues.

Optionally, the assembly holes in the liquid cooling cover plate are arranged in a row along a first direction, and the assembly holes are provided with multiple rows along a second direction.

Optionally, the rib further includes a plurality of connecting ribs, the connecting ribs connect the annular ribs in two adjacent assembling holes along the first direction to form a wall plate, and the liquid cooling flow channel is formed between the two adjacent wall plates along the second direction and the top plate and the bottom plate.

Optionally, the liquid cooling apron is provided with inlet and liquid outlet, the liquid cooling runner with the inlet the liquid outlet intercommunication.

Optionally, a flange extending away from the top plate is arranged on the bottom plate, and the flange and the bottom plate form a receiving groove.

Optionally, the side plate extends in a direction away from the top plate and forms a glue storage groove with the turned edge and the bottom plate, and the glue storage groove is used for filling glue.

Another object of the utility model is to provide a battery module, this battery module convenient assembling has good heat dispersion, and the security performance is high.

the battery module comprises a plurality of battery cores and the liquid cooling device, wherein the liquid cooling cover plate is arranged on one side of the battery cores.

Optionally, the battery module includes the tray, electric core sets up in the tray, the liquid cooling apron with the tray is connected.

Optionally, the assembly hole on the liquid cooling cover plate comprises a positive electrode hole and a negative electrode hole, the positive electrode hole is opposite to the positive electrode of the battery cell, and the negative electrode hole is opposite to the negative electrode of the battery cell.

Optionally, the battery module still includes the busbar, the busbar sets up in the holding tank of liquid cooling apron, the busbar is used for a plurality of electric core carries out the electricity and connects.

Optionally, all be provided with on the curb plate of liquid cooling apron and the turn-ups and dodge the mouth, be provided with connecting portion on the busbar, connecting portion follow dodge the mouth and stretch out.

Optionally, a sealing ring is sleeved on the connecting portion, and the sealing ring can seal the avoiding opening.

Has the beneficial effects that:

the utility model provides a liquid cooling apron can regard as upper cover or lower cover to play the guard action to the electric component in the battery module, prevents that the outside metal contact of electric component and battery module from taking place the short circuit. The liquid cooling apron passes through the connection formation cavity of roof, bottom plate and curb plate, separates through the floor in the cavity and forms a plurality of liquid cooling runners, carries the coolant liquid in to the liquid cooling runner, and the heat that the electricity core produced can be taken away to the coolant liquid to reach the purpose to the battery module cooling. Compared with the structure of the traditional battery module, the liquid cooling cover plate can realize the integration of the cover body and the liquid cooling plate, and the design reduces the parts required by the battery module in groups, thereby simplifying the assembly process and improving the production efficiency of the battery module.

Drawings

Fig. 1 is a schematic structural diagram of a liquid cooling cover plate according to the present invention;

fig. 2 is a second schematic structural diagram of the liquid cooling cover plate provided by the present invention;

fig. 3 is a cross-sectional view of a liquid cooling cover plate provided by the present invention;

fig. 4 is an exploded view of a battery module according to the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 2 at A;

fig. 6 is an assembly view of the battery module according to the present invention.

In the figure:

100. an electric core; 200. a liquid cooling cover plate; 210. a top plate; 220. a base plate; 230. a side plate; 240. a rib plate; 241. an annular rib plate; 242. connecting the rib plates; 250. an assembly hole; 260. a liquid inlet; 270. a liquid outlet; 280. flanging; 290. a glue storage tank; 300. a tray; 400. heat-conducting structural adhesive; 500. a bus bar; 510. a connecting portion; 600. a plastic bracket.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, 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; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Referring to fig. 1 and 2, the present embodiment provides a liquid cooling apparatus including a liquid cooling cover plate 200. The liquid-cooled cover plate 200 includes a top plate 210, a bottom plate 220, and side plates 230, the top plate 210 and the bottom plate 220 being connected by the side plates 230 to form a chamber. Ribs 240 are disposed between the top plate 210 and the bottom plate 220, and the ribs 240 divide the chamber into a plurality of liquid cooling channels for circulating a cooling liquid.

The liquid cooling cover plate 200 can be used as an upper cover or a lower cover to protect the electrical components in the battery module, and prevent the electrical components from being short-circuited with the metal outside the battery module. The liquid cooling apron 200 forms the cavity through the connection of roof 210, bottom plate 220 and curb plate 230, separates through floor 240 in the cavity and forms a plurality of liquid cooling runners to carrying the coolant liquid in the liquid cooling runner, and the heat of battery module can be taken away to the coolant liquid to reach the purpose to the battery module cooling. Compared with the structure of the traditional battery module, the liquid cooling cover plate realizes the integration of the cover plate and the liquid cooling plate, and the design reduces the parts required by the battery module in groups, thereby simplifying the assembly process and improving the production efficiency of the battery module.

Further, referring to fig. 1 to 3, a plurality of first through holes are provided in the top plate 210, a plurality of second through holes are provided in the bottom plate 220, the first through holes and the second through holes are arranged oppositely, the rib plate 240 includes an annular rib plate 241, the annular rib plate 241 connects the first through holes and the second through holes to form an assembly hole 250, a bus bar 500 is provided between the battery cell 100 and the liquid-cooling cover plate 200, and the assembly hole 250 is used for welding the bus bar 500 and the battery cell 100. Through set up pilot hole 250 on liquid cooling apron 200, when carrying out the assembly of busbar 500 and electric core 100, accessible pilot hole 250 welds busbar 500 and electric core 100, and liquid cooling apron 200 adopts this kind of structure, can play welding jig's effect, saves welding jig's setting and use, has simplified the assembly process of battery module to the assembly efficiency of battery module has been improved. It is to be understood that the bus bar 500 is disposed corresponding to the battery cells 100, and the fitting holes 250 are disposed according to the positions of the welding points of the bus bar 500 and the battery cells 100.

Further, a heat conducting structure adhesive 400 is further disposed below the liquid cooling cover plate 200, and the assembling hole 250 can be used for injecting the heat conducting structure adhesive 400. The heat that the battery module produced can be transmitted to liquid cooling apron 200 fast in the setting of heat conduction structure glue 400, and then takes away the heat through the coolant liquid, has further improved the cooling effect, reduces electric core 100 thermal runaway risk. In this embodiment, after the bus bar 500 and the battery cell 100 are welded, the heat conducting structure adhesive 400 is injected through the assembling hole 250. Through the 250 injecting glue of pilot hole, can observe the gluey condition through pilot hole 250, can confirm the quantity of heat conduction structure glue 400 accurately, avoid extravagant.

Referring to fig. 3 and 4, in the present embodiment, the mounting holes 250 of the liquid-cooled cover plate 200 are arranged in a row in the first direction, and the mounting holes 250 are provided in a plurality of rows in the second direction. Therefore, the annular ribs 241 are arranged in a row along the first direction of the liquid cooling cover plate 200, and the liquid cooling cover plate 200 is provided with a plurality of rows of annular ribs 241 along the second direction. In the present embodiment, the first direction refers to the length direction of the liquid cooling cover plate 200, and the second direction refers to the width direction of the liquid cooling cover plate 200, in other cases, the distribution manner of the assembling holes 250 is not limited thereto, and may be set according to the use requirement.

With continued reference to fig. 3 and 4, the ribs 240 further include connecting ribs 242, the connecting ribs 242 connect the annular ribs 241 of two adjacent assembly holes 250 along a first direction of the liquid-cooling cover plate 200 to form wall plates, and liquid-cooling flow passages are formed between two adjacent wall plates along a second direction and the top plate 210 and the bottom plate 220. In this embodiment, because the pilot hole 250 is provided with the multirow, consequently, the wallboard is provided with the multirow, because pilot hole 250 is irregular annular, therefore, the wallboard is the curvilinear figure to increased the length of liquid cooling runner, the coolant liquid is filled in the liquid cooling runner and needs longer time, and the cooling effect is better.

The liquid cooling cover plate 200 is provided with a liquid inlet 260 and a liquid outlet 270, and the liquid cooling runner is communicated with the liquid inlet 260 and the liquid outlet 270. In this embodiment, a connection line between the liquid inlet 260 and the liquid outlet 270 is a length direction of the liquid cooling cover plate 200, and is disposed on the side plate 230 of the liquid cooling cover plate 200. In other embodiments, the positions of the inlet 260 and the outlet 270 may be set according to the use requirement.

The bottom plate 220 has a flange 280 extending away from the top plate 210, and the flange 280 and the bottom plate 220 form a receiving groove, in this embodiment, the liquid-cooled cover plate 200 is disposed on the top of the battery cell 100, and the top of the battery cell 100 extends into the receiving groove, so as to position the liquid-cooled cover plate 200 on the battery cell 100.

Further, the side plates 230 extend away from the top plate 210 and form glue storage grooves 290 with the flanges 280 and the bottom plate 220, and the glue storage grooves 290 are used for filling glue.

Referring to fig. 4 to fig. 6, the present embodiment further provides a battery module, which includes a plurality of battery cells 100 and the above liquid cooling apparatus, and the liquid cooling cover 200 is disposed on one side of the battery cells 100. Optionally, the liquid cooling cover plate 200 may be disposed on the top of the battery cell 100, or disposed on the bottom of the battery cell 100, and may be disposed according to the overall structure layout of the battery module, which is not specifically limited herein. Optionally, in this embodiment, the battery module further includes a tray 300, the battery cell 100 is disposed in the tray 300, the liquid cooling cover plate 200 is connected to the tray 300, the tray 300 is disposed at the bottom of the battery cell 100 and supports the battery cell 100, and the liquid cooling cover plate 200 is disposed at the top of the battery cell 100 and serves as an upper cover of the battery module, and plays a role in cooling. The tray 300 is provided with a plurality of positioning grooves for accommodating the battery cells 100, and the tray 300 can realize the positioning of the battery cells 100 and avoid the contact short circuit of the battery cells 100. The tray 300 and the liquid cooling cover plate 200 may be glued or screwed or otherwise attached. In this embodiment, the liquid-cooled cover plate 200 is attached to the tray 300 by glue in the glue reservoir 290. By arranging the glue storage tank 290, more glue can be contained, and firm bonding between the liquid cooling cover plate 200 and the tray 300 is ensured.

Further, the battery module still includes busbar 500 and plastic support 600, and busbar 500 sets up the top at a plurality of electric cores 100 to carry out the electricity with a plurality of electric cores 100 and connect, plastic support 600 sets up in busbar 500 top, and plastic support 600 can realize busbar 500 and the insulating isolation of liquid cooling apron 200. The heat-conducting structural adhesive 400 is filled between the plastic support 600 and the liquid-cooling cover plate 200, so that the insulation effect can be further increased, and the heat dissipation efficiency is improved. Optionally, the side plate 230 and the flange 280 of the liquid cooling cover plate 200 are provided with an avoiding opening, the bus bar 500 is provided with a connecting portion 510, the connecting portion 510 extends out from the avoiding opening, and the connecting portion 510 is used for electrically connecting with a wire harness. Alternatively, a sealing ring may be disposed around the connecting portion 510 to seal the bypass opening.

Optionally, the top of the battery cell 100 is provided with a terminal, and the terminal protrudes from the top surface of the battery cell 100 and is concentric with the battery cell 100. In this embodiment, the terminal is a positive electrode of the battery cell 100, and the top surface of the battery cell 100 located on the outer ring of the terminal is a negative electrode. The assembly hole 250 includes a positive hole facing the positive electrode of the battery cell 100 and a negative hole facing the negative electrode of the battery cell 100. Optionally, since the post is cylindrical, the positive electrode hole is circular, the negative electrode hole is connected with the positive electrode hole, and the negative electrode hole is fan-shaped. When welding is performed, the bus bar 500 is welded to the positive electrode of the battery cell 100 through the circular positive electrode hole, and the other bus bar 500 is welded to the negative electrode of the battery cell 100 through the fan-shaped negative electrode hole.

It is to be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Liquid cooling device, its characterized in that includes:

liquid cooling apron (200), including roof (210), bottom plate (220) and curb plate (230), roof (210) with bottom plate (220) pass through curb plate (230) are connected and are formed the cavity, roof (210) with be provided with floor (240) between bottom plate (220), floor (240) will a plurality of liquid cooling runners are separated into to the cavity, the liquid cooling runner is used for circulating the coolant liquid.

2. The liquid cooling apparatus of claim 1, wherein the top plate (210) has a plurality of first through holes, the bottom plate (220) has a plurality of second through holes, the first and second through holes are oppositely disposed, and the rib (240) comprises a plurality of annular ribs (241), the annular ribs (241) communicating the first and second through holes to form assembly holes (250).

3. The liquid cooling device of claim 2, wherein a thermally conductive adhesive (400) is disposed under the liquid cooling cover plate (200), and the assembly hole (250) is used for injecting the thermally conductive adhesive (400).

4. The liquid cooling apparatus of claim 2, wherein said liquid cooling cover plate (200) has said mounting holes (250) aligned in a first direction, and wherein said mounting holes (250) are arranged in a plurality of rows in a second direction.

5. The liquid cooling apparatus of claim 4, wherein said ribs (240) further comprise a plurality of connecting ribs (242), said connecting ribs (242) connecting said annular ribs (241) of two adjacent ones of said mounting holes (250) in said first direction to form wall plates, and said liquid cooling channels are formed between two adjacent ones of said wall plates in said second direction and said top plate (210) and said bottom plate (220).

6. The liquid cooling device as recited in claim 5, wherein the liquid cooling cover plate (200) is provided with a liquid inlet (260) and a liquid outlet (270), and the liquid cooling channel is communicated with the liquid inlet (260) and the liquid outlet (270).

7. The liquid cooling device of any of claims 1-6, wherein the bottom plate (220) has a flange (280) extending away from the top plate (210), the flange (280) forming a receiving slot with the bottom plate (220).

8. The liquid cooling device of claim 7, wherein the side plates (230) extend away from the top plate (210) and form glue reservoirs (290) with the flanges (280) and the bottom plate (220), and the glue reservoirs (290) are filled with glue.

9. Battery module, characterized in that, includes a plurality of electric cores (100) and the liquid cooling device of any one of claims 1-8, the liquid cooling apron (200) is set up in electric core (100) one side.

10. The battery module according to claim 9, characterized in that, the battery module comprises a tray (300), the electric core (100) is arranged in the tray (300), and the liquid-cooled cover plate (200) is connected with the tray (300).

11. The battery module according to claim 9 or 10, wherein the assembly holes (250) of the liquid-cooled cover plate (200) comprise a positive hole facing the positive electrode of the electric core (100) and a negative hole facing the negative electrode of the electric core (100).

12. The battery module according to claim 9 or 10, characterized in that the battery module further comprises a bus bar (500), wherein the bus bar (500) is arranged in a receiving groove of the liquid-cooled cover plate (200), and the bus bar (500) is used for electrically connecting a plurality of the battery cells (100).

13. The battery module as recited in claim 12, wherein the liquid-cooled cover plate (200) is provided with an avoidance port on each of the side plate (230) and the flange (280), the bus bar (500) is provided with a connection portion (510), and the connection portion (510) extends out of the avoidance port.

14. The battery module according to claim 13, wherein a sealing ring is sleeved on the connecting portion (510), and the sealing ring can seal the avoiding opening.