CN217334215U

CN217334215U - Battery device

Info

Publication number: CN217334215U
Application number: CN202220353131.8U
Authority: CN
Inventors: 许淘淘; 陈水林; 孔繁明
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2022-02-21
Filing date: 2022-02-21
Publication date: 2022-08-30
Anticipated expiration: 2032-02-21

Abstract

The application relates to the technical field of batteries and discloses a battery device. The battery device comprises a box body and a battery pack arranged in the box body; the box body comprises a beam structure and a liquid cooling plate, wherein a flange is arranged on one side of the beam structure close to the liquid cooling plate, a concave part capable of accommodating the flange is arranged on one side of the liquid cooling plate facing the beam structure, and the depth of the concave part is smaller than the thickness of the flange; the battery pack directly falls on the flash of the beam structure; and heat-conducting insulating glue is arranged between the liquid cooling plate and the battery pack, and the projection of the heat-conducting insulating glue on the plane where the liquid cooling plate is located and the projection of the beam structure on the plane where the liquid cooling plate is located are not overlapped. The application provides a battery device, processing is convenient, light in weight, and energy density is higher, and the radiating effect is better.

Description

Battery device

Technical Field

The utility model relates to a battery technology field especially relates to a battery device.

Background

The current battery device box adopts a liquid cooling scheme, and along with the requirement on the energy density of the battery is higher and higher, the requirement of a thermal management system on the liquid cooling flow is increased. Meanwhile, the liquid cooling plate in the battery pack box body which is mainstream at present adopts a stamping plate scheme, the stamping plate is widely applied by the characteristics of high design freedom degree, light weight and small pressure loss, but the current stamping plate scheme has the defect of incapability of bearing, so that the wider application of the stamping plate is limited, and the improvement of the battery device box body is further limited. Therefore, how to arrange the case of the battery device to improve the performance of the battery device and increase the energy density of the battery device is an urgent problem to be solved in the current battery devices.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery device for improve battery device structure, promote the battery device performance.

The application provides a battery device, which comprises a box body and a battery pack arranged in the box body; the box body comprises a beam structure and a liquid cooling plate, wherein a flange is arranged on one side of the beam structure close to the liquid cooling plate, a sunken part capable of accommodating the flange is arranged on one side of the liquid cooling plate facing the beam structure, and the depth of the sunken part is smaller than the thickness of the flange; the battery pack directly falls on the flash of the beam structure; and heat-conducting insulating glue is arranged between the liquid cooling plate and the battery pack, and the projection of the heat-conducting insulating glue on the plane where the liquid cooling plate is located and the projection of the beam structure on the plane where the liquid cooling plate is located are not overlapped.

The application provides a battery device is equipped with the overlap on beam structure, and this overlap can bear the group battery, and the group battery directly falls on beam structure's overlap, need not the liquid cooling board bearing, and then, the liquid cooling board can adopt punching press board processing scheme, and the design degree of freedom is high, and processing is convenient to light in weight is favorable to improving battery device's energy density. Secondly, the battery device that this application provided is equipped with the depressed part on the liquid cooling board, and the overlap of beam structure holds in the depressed part to make the difference in height between the face outside overlap and the liquid cooling board depressed part reduce, and then be favorable to reducing battery device's height, and can reduce the thickness of the heat conduction insulating glue that sets up between liquid cooling board and group battery, thereby be favorable to improving battery device's energy density, improve battery device packaging efficiency, reduce battery device assembly cost. In addition, the liquid cooling plate is bonded with the battery pack through heat conducting insulating glue, so that the fixing strength of the battery pack and the box body can be ensured, and the heat dissipation efficiency of the battery pack can be improved; and only scribble heat conduction insulating cement on the position that the liquid cooling board does not contact with the beam structure, can further reduce heat conduction insulating cement's thickness and battery device's height, improve battery device's energy density to, can also guarantee to be the direct contact heat dissipation between the tip of group battery and the beam structure, can improve the radiating efficiency of group battery tip, it is inhomogeneous to avoid the middle and tip difference in temperature of group battery, improves the temperature homogeneity of group battery, improves product competitiveness.

Drawings

For a better understanding of the present invention, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and some relevant components may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art.

Fig. 1 is a schematic view of a partial structure of a battery device according to an embodiment of the present invention;

fig. 2 is a schematic view of a part of a structure of a box of a battery device provided by an embodiment of the present invention;

fig. 3 is a schematic view of a partial structure of a battery device according to another embodiment of the present invention.

Reference numerals:

1-beam structure; 11-flashing; 2-liquid cooling plate; 20-a recess;

21-upper layer plate; 22-lower layer plate; 220-a first projection;

200-heat exchange flow channel; 3, heat-conducting insulating glue; 4-a battery; 40-a battery pack;

5-a box frame; 6-bottom guard board.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

As shown in fig. 1, 2 and 3, the present application provides a battery device including a case and a battery pack 40 disposed in the case; the box body comprises a beam structure 1 and a liquid cooling plate 2, wherein the beam structure 1 is used for enclosing a chamber to contain the battery pack 40, and the liquid cooling plate 2 is connected with the beam structure 1 and is used for exchanging heat with the battery pack 40; the side, close to the liquid cooling plate 2, of the beam structure 1 is provided with a flash 11, one side, facing the beam structure 1, of the liquid cooling plate 2 is provided with a concave part 20 capable of accommodating the flash 11, and the depth of the concave part 20 is smaller than the thickness of the flash 11; the battery pack 40 directly falls on the flange 11 of the beam structure 1, namely the peripheral edge of the battery pack 40 is directly overlapped on the flange 11 of the beam structure 1 and is supported by the flange 11 of the beam structure 1; be equipped with heat conduction insulating cement 3 between liquid cooling board 2 and the group battery 40, bond through heat conduction insulating cement 3 between liquid cooling board 2 and the group battery 40, this heat conduction insulating cement 3 projection on the plane of liquid cooling board 2 place and the projection of beam structure 1 on the plane of liquid cooling board 2 place are not overlapped, only scribble heat conduction insulating cement 3 on the position that liquid cooling board 2 does not contact with beam structure 1 promptly, or stated otherwise, heat conduction insulating cement 3 only covers liquid cooling board 2, does not have heat conduction insulating cement 3 on beam structure 1's overlap 11.

The application provides a battery device is equipped with overlap 11 on beam structure 1, and this overlap 11 can bear group battery 40, and group battery 40 directly falls on beam structure 1's overlap 11, need not the 2 bearing of liquid cold plate, and then, liquid cold plate 2 can adopt the punching press board processing scheme, and the design degree of freedom is high, and processing is convenient to light in weight is favorable to improving battery device's energy density. Secondly, the battery device that this application provided, be equipped with depressed part 20 on liquid cooling plate 2, the overlap 11 of beam structure 1 holds in depressed part 20, the difference in height between the face outside overlap 11 and the 2 depressed parts 20 of liquid cooling plate reduces, and then is favorable to reducing battery device's height, and can reduce the thickness of the heat conduction insulating cement 3 that sets up between liquid cooling plate 2 and group battery 40, thereby be favorable to improving battery device's energy density, improve battery device packaging efficiency, reduce battery device assembly cost. In addition, the liquid cooling plate 2 is bonded with the battery pack 40 through the heat conducting insulating glue 3, so that the fixing strength of the battery pack 40 and the box body can be ensured, and the heat dissipation efficiency of the battery pack 40 can be improved; and the heat-conducting insulating glue only covers the liquid cooling plate 2, does not cover the flash 11 of the beam structure 1, can further reduce the thickness of the heat-conducting insulating glue 3 and the height of the battery device, improve the energy density of the battery device, and can also ensure that the end part of the battery pack 40 can be directly contacted with the beam structure 1 for heat dissipation, thereby improving the heat dissipation efficiency of the end part of the battery pack 40, avoiding the uneven temperature difference between the middle part and the end part of the battery pack 40, improving the temperature uniformity of the battery pack 40 and improving the product competitiveness.

In some embodiments, as shown in fig. 1, two portions of the fins 11 may extend from two opposite sides of one side surface of the beam structure 1 close to the liquid cooling plate 2, or only one portion of the fins 11 may extend from one side, which may be specifically designed according to actual requirements. For example, two sides of the beam structure 1 enclose a cavity, and the two sides of the beam structure are used for accommodating batteries, at this time, two parts of flashes 11 may extend from the two opposite sides of the beam structure 1 to respectively bear the batteries in the cavities on the two sides; if the beam structure 1 encloses a chamber on only one side, for example if the beam structure 1 is an edge beam next to the tank frame 5, then the beam structure 1 extends only from one side edge with a flash 11 for carrying the battery in the chamber on that side.

Specifically, as shown in fig. 1 and 3, each cavity of the case of the battery device is generally used for accommodating a battery pack 40, the battery pack 40 may be a battery module or a battery pack in a non-module form, and the battery pack 40 includes a plurality of batteries 4. The battery in the embodiment of the present application is a square battery, and specifically, may be a square lithium ion battery.

In some embodiments, as shown in fig. 2 and 3, the thickness of the heat conducting and insulating paste 3 is the difference between the thickness of the flash 11 and the depth of the concave portion 20, and the difference ranges from 0.8mm to 1.5mm, i.e. the thickness of the heat conducting and insulating paste 3 ranges from 0.8mm to 1.5 mm. Thus, the bottom of the battery 4 can be ensured to be simultaneously contacted with the heat-conducting insulating glue 3 and the flash 11 of the beam structure 1, so that the bearing effect and the heat dissipation performance of the battery 4 are ensured.

In some embodiments, the fins 11 of the beam structure 1 are provided with an insulating coating. Thus, short circuit between the batteries 4 due to the burrs 11 can be avoided, and the safety performance of the battery device can be improved.

In some embodiments, as shown in fig. 2 and 3, the liquid-cooled plate 2 includes an upper plate 21 and a lower plate 22, the upper plate 21 is close to the beam structure 1, and the lower plate 22 is located on the side of the upper plate 21 away from the beam structure 1; the upper plate 21 and the lower plate 22 are provided with conformal bulges facing away from the beam structure 1, so that the liquid cooling plate 2 forms a concave part 20 facing to one side of the beam structure 1; that is, the upper plate 21 and the lower plate 22 are protruded toward the side away from the beam structure 1 at the same position, and the protruded shapes of the upper plate and the lower plate are matched and attached, so that the liquid cooling plate 2 forms the concave portion 20 toward the side of the beam structure 1. Thus, the structural strength of the entire liquid-cooled panel 2 can be improved, and the overall structural strength of the battery device can be enhanced.

In some embodiments, as shown in fig. 2 and 3, a first protrusion 220 is further disposed on a side of the lower plate 22 facing away from the beam structure 1, and a heat exchange flow channel 200 is defined between the first protrusion 220 and the upper plate 21.

The first protrusion 220 of the lower plate 22 is used as a flow channel design, a cooling liquid is introduced into the flow channel, and the cooling liquid flows to take away the heat of the battery 4, so that the cooling purpose is achieved; meanwhile, the cooling liquid can also be used for heating under the low-temperature heating working condition so as to improve the temperature of the battery 4.

It is specific, it is protruding with following the type to be equipped with first arch 220 on the lower floor plate 22 in proper order, first arch 220 forms heat transfer runner 200, follow protruding overlap 11 that forms depressed part 20 in order to hold beam structure 1 of type, therefore, can make the interval between the heat transfer runner 200 of beam structure 1 and liquid cold plate 2 enlarge, reduce liquid cold plate 2 and transfer heat to beam structure 1, and then avoid the heat transfer of beam structure 1 and group battery tip, reduce the heat dissipation gap at group battery tip and middle part, improve the temperature homogeneity of group battery, improve product competitiveness.

In some embodiments, as shown in fig. 1, in the battery device of the present embodiment, the box further includes a box frame 5 surrounding the beam structure 1, and the box frame 5 is fixedly connected to the beam structure 1.

Illustratively, as shown in fig. 1 and 2, the liquid cooling plate 2 is located at the bottom of the tank frame 5 and is fixed to the tank frame 5 and the beam structure 1. Specifically, the liquid cooling plate 2 may be fixed to the tank frame 5 and the beam structure 1 by a connecting member such as a bolt.

Further, as shown in fig. 1 and fig. 2, in the battery device of the present embodiment, the box body may further include a bottom guard plate 6 located on a side of the liquid cooling plate 2 away from the beam structure 1, and the bottom guard plate 6 is fixed to the box body frame 5 and the beam structure 1. Specifically, the bottom guard plate 6 may be fixed to the box frame 5 and the beam structure 1 by a connecting member such as a bolt. For example, the liquid cooling plate 2 and the bottom guard plate 6 may be fixed by using the same set of bolts, specifically, the bolts sequentially penetrate through the liquid cooling plate 2 and the bottom guard plate 6 and are inserted into the tank frame 5 or the beam structure 1, so as to fix the liquid cooling plate 2 and the bottom guard plate 6 on the tank frame 5 or the beam structure 1.

In some embodiments, the battery device of the present application includes a battery pack including at least two batteries, and the at least two batteries and the beam structure do not have end plates and/or side plates therebetween. In other words, in the present embodiment, the battery pack is in a non-module type; thus, the heat exchange of the battery is facilitated, and the energy density of the battery device can be improved.

Specifically, the battery device that this application provided is the battery package, and this battery package energy density is higher, and the radiating effect is good, and battery device's structural strength is better, and the packaging efficiency is fast, and assembly cost is low.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims. It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the disclosure is limited only by the appended claims.

Claims

1. The battery device is characterized by comprising a box body and a battery pack arranged in the box body; the box body comprises a beam structure and a liquid cooling plate, wherein a flange is arranged on one side of the beam structure close to the liquid cooling plate, a concave part capable of accommodating the flange is arranged on one side of the liquid cooling plate facing the beam structure, and the depth of the concave part is smaller than the thickness of the flange; the battery pack directly falls on the flash of the beam structure; and heat-conducting insulating glue is arranged between the liquid cooling plate and the battery pack, and the projection of the heat-conducting insulating glue on the plane where the liquid cooling plate is located and the projection of the beam structure on the plane where the liquid cooling plate is located are not overlapped.

2. The battery device according to claim 1, wherein the thickness of the thermally conductive and insulating paste is a difference between the thickness of the flash and the depth of the depression, and the difference is in a range of 0.8mm to 1.5 mm.

3. The battery device of claim 1, wherein the flash is provided with an insulating coating.

4. The battery device of claim 1, wherein the liquid cooled panel comprises an upper panel and a lower panel, the upper panel being proximate the beam structure and the lower panel being on a side of the upper panel distal from the beam structure; the upper plate and the lower plate are provided with conformal bulges facing away from one side of the beam structure, so that the liquid cooling plate forms the sunken part facing one side of the beam structure.

5. The battery device of claim 4, wherein the lower plate is further provided with a first protrusion on a side facing away from the beam structure, and the first protrusion and the upper plate define a heat exchange flow passage therebetween.

6. The battery device of any of claims 1-5, wherein the case further comprises a case frame surrounding the beam structure, the case frame being fixedly attached to the beam structure.

7. The battery apparatus of claim 6, wherein the liquid cooling plate is located at the bottom of the case frame and is fixed to the case frame and the beam structure.

8. The battery device of claim 7, wherein the tank further comprises a backplate on a side of the liquid cold plate away from the beam structure, the backplate secured to the tank frame and the beam structure.

9. The battery device according to any one of claims 1 to 5, wherein the battery pack comprises at least two batteries, and wherein there are no end plates and/or side plates between the at least two batteries and the beam structure.