CN215418310U

CN215418310U - Top thermal management power battery

Info

Publication number: CN215418310U
Application number: CN202120789670.1U
Authority: CN
Inventors: 闫仕伟; 叶斌; 刘华俊; 阎明瀚; 徐宇虹; 江吉兵
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2022-01-04
Anticipated expiration: 2031-04-16

Abstract

The utility model discloses a top heat management power battery which comprises a battery cell module, a lower box body, a box cover and a cooling plate, wherein the lower box body is abutted against the bottom of the battery cell module; the box cover is covered on the lower box body, and an accommodating cavity for accommodating the battery cell module is formed between the box cover and the lower box body; be provided with cooling channel in the cooling plate, cooling circulation device and cooling channel intercommunication and drive coolant circulate and flow in cooling channel inner loop, and the cooling plate sets up between electric core module and case lid, and the one side laminating of box under cooling plate and electric core module keep away from. According to the top thermal management power battery, the cooling plate attached to the top of the battery core module is arranged between the box cover and the battery core module, so that heat generated by the battery core module can be quickly transmitted to the outside along the cooling plate, the cooling plate arranged above the battery core module does not need to bear the weight of the battery core module, the cooling plate is not easy to be extruded and damaged, and the safety performance and the heat dissipation performance of the cooling plate are improved.

Description

Top thermal management power battery

Technical Field

The utility model relates to the field of power battery structural design, in particular to a top thermal management power battery.

Background

The power battery is an energy supply part commonly used by the electric automobile, the power battery can continuously emit heat when in use, and in order to prevent the heat from accumulating to damage the power battery, a cooling system is also needed to be arranged in the power battery so as to timely dissipate the heat generated by the power battery.

Cooling system among the prior art adopts the liquid cooling board of integrated in the battery box to come for the battery cooling usually, and the bottom plate of battery box and the direct laminating of bottom of battery are often regarded as to the liquid cooling board, in case the battery box damage of integrated liquid cooling board, the liquid of revealing can lead to whole box to scrap.

In addition, the liquid cooling plate radiating efficiency of setting in the battery bottom among the prior art is lower, because heat and the hot-air that the battery produced can upwards spread, and the liquid cooling plate that sets up in the battery bottom can't in time spill the heat on battery upper portion for power battery produces the difference in temperature from top to bottom, influences power battery's life-span.

Therefore, the design of the top heat management power battery with the advantages of difficult leakage of cooling liquid, good safety and good heat dissipation performance is a problem which needs to be solved urgently by power battery structure designers.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide the top heat management power battery which is not easy to leak cooling liquid, good in safety and good in heat dissipation performance.

The purpose of the utility model is realized by the following technical scheme:

a top thermal management power battery comprises a battery cell module, a lower box body, a box cover and a cooling plate, wherein the lower box body is used for abutting against the bottom of the battery cell module;

the box cover is arranged on the lower box body, an accommodating cavity is formed between the box cover and the lower box body, and the accommodating cavity is used for accommodating the battery cell module;

the battery cell module is characterized in that a cooling channel is arranged in the cooling plate, the cooling channel is used for being communicated with a cooling circulation device, so that the cooling circulation device drives a cooling medium to circularly flow in the cooling channel, the cooling plate is arranged between the battery cell module and the box cover, and the cooling plate is attached to one surface, away from the lower box body, of the battery cell module.

In one embodiment, the cooling plate comprises a flat plate and a groove plate which are attached to each other, a cooling groove is formed in one surface, close to the flat plate, of the groove plate, and the cooling groove and the flat plate jointly enclose the cooling channel.

In one embodiment, the cooling plate further includes a cooling pipe, the flat plate is provided with a cooling hole disposed toward the cooling groove, one end of the cooling pipe is connected to the cooling hole, and the other end of the cooling pipe is connected to the cooling circulation device.

In one embodiment, the cooling tube is a bellows.

In one of them embodiment, the cooling plate is last to be seted up the locking hole that supplies the retaining member to pass, the both ends of retaining member respectively with the cooling plate reaches lower box body coupling, the retaining member is used for the pulling the cooling plate, so that the cooling plate with the laminating of electricity core module.

In one embodiment, the locking member is a bolt, the head of the bolt abuts against one surface of the cooling plate, which is far away from the battery cell module, and the bolt part of the bolt penetrates through the locking hole and is in threaded connection with the lower box body.

In one embodiment, the battery cell modules are provided with a plurality of battery cell modules, a connecting boss fixedly connected to the lower box body is arranged between every two adjacent battery cell modules, a locking structure is arranged on the connecting boss, and the locking structure is used for being connected with the locking member.

In one embodiment, the top thermal management power battery further comprises an elastic member, the elastic member is disposed between the cell module and the lower case in a compressed state, and the elastic member is used for pushing the cell module to abut against the cooling plate.

In one embodiment, the elastic member is foam.

In one embodiment, a heat-conducting adhesive is arranged on one surface, close to the cell module, of the cooling plate.

Compared with the prior art, the utility model has at least the following advantages:

1. according to the top heat management power battery, the battery cell module, the lower box body and the box cover are arranged, and the cooling plate attached to the top of the battery cell module is arranged between the box cover and the battery cell module, so that heat generated by the battery cell module can be quickly transmitted to the outside along the cooling plate, and because the cooling plate is arranged on the upper portion of the battery cell module and is designed separately from the box cover, compared with the mode that the battery cell module is carried by integrating the cooling plate on the bottom of the box body in the existing design, the cooling plate arranged above the battery cell module does not need to bear the weight of the battery cell module, so that the cooling plate is not easy to be extruded and damaged, and meanwhile, the safety performance and the heat dissipation performance of the cooling plate are improved.

2. In one embodiment, the top heat management power battery provided by the utility model has the advantages that the locking holes are formed in the cooling plate, and the locking pieces penetrate through the locking holes to be connected with the lower box body, so that the attaching tightness between the cooling plate and the battery cell module is ensured, the cooling plate is prevented from tilting, and the heat dissipation efficiency is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is an exploded view of a top thermally managed power cell in an embodiment of the present invention;

FIG. 2 is a schematic structural view of a cooling plate of the top thermally managed power cell of FIG. 1;

fig. 3 is a schematic structural diagram of a top thermal management power cell according to an embodiment of the utility model;

fig. 4 is an enlarged view of a portion a in fig. 3.

Description of reference numerals:

a top thermally managed power cell 10; a cell module 100; a lower case 200; a connection boss 210; a case cover 300; a receiving cavity 310; a cooling plate 400; a cooling channel 410; a plate 420; cooling holes 421; a groove plate 430; a cooling tank 431; a cooling pipe 440; a retaining member 450; a locking aperture 460; thermally conductive adhesive 470; the elastic member 500.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

At present, liquid cooling schemes in the industry mostly adopt the liquid cooling plate to be placed at the bottom of the battery, the liquid cooling plate needs to bear the weight of the battery and is easy to damage, the liquid cooling plate needs to be made very thick to ensure that the strength of the liquid cooling plate can sufficiently support the battery, and the specific energy of the power battery is reduced.

The battery can constantly produce the heat during the use, and heat heated air, air are heated expansion density and reduce, and then hot-air gathers in the upper portion of battery, and it is poor to place the liquid cooling board radiating effect in the battery bottom among the prior art, still can lead to the temperature difference from top to bottom of the battery too big, influences the battery life-span.

To solve the above problem, the present invention provides a top thermally managed power cell 10.

Referring to fig. 1 to 4, a top thermal management power battery 10 includes a battery cell module 100, a lower case 200, a case cover 300, and a cooling plate 400, where the lower case 200 is used to abut against the bottom of the battery cell module 100; the case cover 300 is covered on the lower case 200, and a containing cavity 310 for containing the battery cell module 100 is formed between the case cover 300 and the lower case 200; a cooling channel 410 is arranged in the cooling plate 400, the cooling circulation device is communicated with the cooling channel 410 to drive a cooling medium to circularly flow in the cooling channel 410, the cooling plate 400 is arranged between the battery cell module 100 and the box cover 300, and one surface of the cooling plate 400, which is far away from the lower box body 200, of the battery cell module 100 is attached.

It should be noted that one or more battery cell modules 100 may be arranged, the battery cell modules are arranged in the accommodating cavity 310 between the lower box 200 and the box cover 300 in an array manner, a cooling channel 410 is arranged in the cooling plate 400, a cooling medium is filled in the cooling channel 410, the cooling medium may be a solution such as water or alcohol, and the cooling circulation device may adopt a water pump commonly used in the prior art, and the cooling medium is driven by the water pump to circulate in the cooling channel 410, so that heat can be dissipated quickly.

Because cooling plate 400 is kept away from the one side laminating of box 200 down with electric core module 100, the heat heating air that electric core module 100 generated, make the hot-air be heated and rise naturally after the inflation and contact with cooling plate 400, after hot-air and cooling plate 400 contact, with heat transfer to cooling plate 400 on, the cooling becomes cold after hot-air and the contact of cooling plate 400, descend naturally, so, the circulation is reciprocal, electric core module 100 is exothermic and heats hot-air on every side, hot-air constantly rises until with the contact of cooling plate 400, the hot-air is with heat transfer to cooling plate 400 after cooling, afterwards descend naturally.

Referring to fig. 1, fig. 2, fig. 3 and fig. 4, in one embodiment, the cooling plate 400 includes a flat plate 420 and a groove plate 430 attached to each other, a cooling groove 431 is formed on a surface of the groove plate 430 close to the flat plate 420, and the cooling groove 431 and the flat plate 420 together enclose a cooling channel 410.

It should be noted that the cooling plate 400 includes the flat plate 420 and the groove plate 430 attached to each other, the cooling groove 431 on the groove plate 430 can be directly manufactured by a stamping process, the process is simple, the manufacturing cost is low, after the groove plate 430 is stamped, the flat plate 420 and the groove plate 430 can be glued or attached to each other, thus, the cooling groove 431 on the groove plate 430 and the flat plate 420 together enclose the cooling channel 410, and the cooling medium can freely flow in the cooling channel 410. Compared with the method of drilling the flat plate 420 to form the cooling channel 410, the method of combining the flat plate 420 and the groove plate 430 to form the cooling channel 410 in the present embodiment is simpler, and the manufactured cooling plate 400 is thinner and lighter, so that the weight of the top thermal management power battery 10 can be reduced better.

Referring to fig. 2, in one embodiment, the cooling plate 400 further includes a cooling pipe 440, the plate 420 is opened with a cooling hole 421 facing the cooling groove 431, one end of the cooling pipe 440 is connected to the cooling hole 421, and the other end of the cooling pipe 440 is connected to a cooling circulation device (not shown).

It should be noted that, the flat plate 420 is provided with a plurality of cooling holes 421 facing the cooling groove 431, where the cooling holes 421 may be provided to improve the efficiency of the circulating heat exchange, and preferably, the flat plate 420 is provided with two cooling holes 421, where one cooling hole 421 is used for filling the cooling medium, and the other cooling hole 421 is used for flowing the cooling medium, and correspondingly, the cooling pipe 440 is provided with two water inlet pipes and two water outlet pipes, where two ends of the water inlet pipe are respectively connected to the cooling hole 421 filled with the cooling medium and the water outlet of the cooling circulation device, and two ends of the water outlet pipe are respectively connected to the cooling hole 421 filled with the cooling medium and the water inlet of the cooling circulation device. In this way, the cooling circulation device (not shown) pumps the cooling medium into the cooling channel and receives the cooling medium flowing out of the cooling plate 400, thereby improving the heat dissipation efficiency.

The cooling plate 400 is a large plate, so that a pipeline system is reduced, and only two water inlet and outlet pipelines contribute to saving pipeline cost.

In order to cope with the situation that the space in the top thermal management power battery 10 is too small and the cooling pipe 440 has some error during assembly, the hard cooling pipe 440 is difficult to bend, so that the cooling pipe 440 is difficult to connect, and in one embodiment, the cooling pipe 440 is a corrugated pipe.

The bellows is a tube which is easy to bend and adjust the angle, and thus the bellows can absorb certain tolerance, so that the installation is simpler and more convenient.

Referring to fig. 2, 3 and 4, in one embodiment, the cooling plate 400 is provided with a locking hole 460 for the locking member 450 to pass through, two ends of the locking member 450 are respectively connected to the cooling plate 400 and the lower case 200, and the locking member 450 is used for pulling the cooling plate 400 to be attached to the battery cell module 100.

It should be noted that, because the cooling plate 400 is large and easy to deform, the cooling plate 400 is tilted from the surface of the battery cell module 100 after being deformed, and thus cannot be effectively attached.

Offer the locking hole 460 that supplies retaining member 450 to pass on the cooling plate 400, locking hole 460 can evenly set up at the middle part of cooling plate 400, and retaining member 450 can be for connecting pieces such as common bolt or joint piece, and after the top laminating of cooling plate 400 and electric core module 100, make the both ends of retaining member 450 be connected with cooling plate 400 and lower box 200 respectively to prevent that cooling plate 400 from breaking away from with electric core module 100 mutually.

Referring to fig. 4, in one embodiment, the locking member 450 is a bolt, a head of the bolt abuts against a surface of the cooling plate 400 away from the battery cell module 100, and a bolt portion of the bolt passes through the locking hole 460 and is screwed with the lower casing 200.

It should be noted that bolt hole positions are added on the cooling plate 400, and the cooling plate 400 and the lower box 200 are drawn together by bolts, so as to ensure the fitting degree.

Referring to fig. 1 and fig. 3, in one embodiment, a plurality of battery cell modules 100 are provided, a connection boss 210 fixedly connected to the lower case 200 is provided between every two adjacent battery cell modules 100, and a locking structure for connecting with the locking member 450 is provided on the connection boss 210.

It should be noted that, in order to improve the connection strength between the cooling plate 400 and the lower case 200 and reduce the distance that the bolt is exposed to the outside, in this embodiment, a connection boss 210 is further fixedly disposed on the lower case 200, and a threaded hole is disposed on the connection boss 210, so that the bolt can be connected with the threaded hole on the connection boss 210 after passing through the locking hole 460, thereby improving the connection strength.

Referring to fig. 1, in one embodiment, the top thermal management power battery 10 further includes an elastic member 500, the elastic member 500 is disposed between the battery cell module 100 and the lower case 200 in a compressed state, and the elastic member 500 is used for pushing the battery cell module 100 to abut against the cooling plate 400.

In one embodiment, the elastic member 500 is foam.

It should be noted that, in order to further guarantee the laminating of cooling plate 400 and battery cell module 100, place the elastic component 500 that is in compression state between battery cell module 100 and the lower box 200, elastic component 500 can be rubber pad or EPP bubble cotton, through the resilience of elastic component 500 for battery cell module 100 and cooling plate 400 are fully laminated.

Referring to fig. 3, in one embodiment, a heat conductive adhesive 470 is disposed on a surface of the cooling plate 400 close to the battery cell module 100.

It should be noted that the heat transfer efficiency between the cooling plate 400 and the cell module 100 can be improved by the heat-conducting adhesive 470. The heat-conducting adhesive 470 can be a common heat-conducting adhesive, and is coated on a surface of the cooling plate 400 close to the battery cell module 100, so as to improve the heat transfer efficiency.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A top thermally managed power cell, comprising:

a battery cell module;

the lower box body is used for abutting against the bottom of the battery cell module;

the box cover is covered on the lower box body, an accommodating cavity is formed between the box cover and the lower box body, and the accommodating cavity is used for accommodating the battery cell module;

the cooling plate is provided with a cooling channel, the cooling channel is used for being communicated with a cooling circulation device, so that the cooling circulation device drives a cooling medium to circularly flow in the cooling channel, the cooling plate is arranged between the battery cell module and the box cover, and the cooling plate is attached to one surface, away from the lower box body, of the battery cell module.

2. The top thermal management power battery of claim 1, wherein the cooling plate comprises a flat plate and a groove plate attached to each other, a cooling groove is formed in one surface of the groove plate close to the flat plate, and the cooling groove and the flat plate jointly enclose the cooling channel.

3. The top heat management power battery of claim 2, wherein the cooling plate further comprises a cooling tube, the flat plate is provided with a cooling hole facing the cooling groove, one end of the cooling tube is connected with the cooling hole, and the other end of the cooling tube is connected with the cooling circulation device.

4. The top thermally managed power cell of claim 3, wherein the cooling tube is a bellows.

5. The top heat management power battery of claim 1 or 2, wherein the cooling plate is provided with locking holes for a locking member to pass through, two ends of the locking member are respectively connected with the cooling plate and the lower case, and the locking member is used for pulling the cooling plate so that the cooling plate is attached to the cell module.

6. The top thermal management power battery of claim 5, wherein the locking member is a bolt, a head of the bolt abuts against one surface of the cooling plate away from the battery cell module, and a bolt portion of the bolt penetrates through the locking hole and is in threaded connection with the lower box body.

7. The top thermal management power battery of claim 5, wherein a plurality of cell modules are arranged, a connecting boss fixedly connected to the lower case is arranged between every two adjacent cell modules, and a locking structure is arranged on the connecting boss and used for being connected with the locking member.

8. The top thermal management power battery of claim 1 or 2, further comprising an elastic member, wherein the elastic member is disposed in a compressed state between the cell module and the lower case, and the elastic member is configured to push the cell module to abut against the cooling plate.

9. The top thermal management power cell of claim 8, wherein the resilient member is foam.

10. The top thermal management power battery of claim 1, wherein a thermally conductive adhesive is disposed on a side of the cooling plate adjacent to the cell module.