CN217589104U

CN217589104U - Liquid cooling plate, battery box and battery pack

Info

Publication number: CN217589104U
Application number: CN202220754796.XU
Authority: CN
Inventors: 帅昌俊; 刘祖勇; 刘石磊; 司伟; 南凯; 张绪文; 田兆; 蒙玉宝; 陈翔
Original assignee: Wuhan Eve Energy Storage Co ltd
Current assignee: Wuhan Eve Energy Storage Co ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-10-14
Anticipated expiration: 2032-03-31

Abstract

The utility model belongs to the technical field of the battery, a liquid cooling board, battery box and battery package are disclosed. The liquid cooling plate comprises a body and a cover plate, wherein the body and the cover plate are connected in a sealing mode to form a closed cavity, the body comprises a refrigerant inlet, a refrigerant outlet and a plurality of first flow guide ribs, the closed cavity is divided into a plurality of flow channels which are communicated with one another through the first flow guide ribs, and the refrigerant inlet and the refrigerant outlet are communicated with the flow channels. The liquid cooling plate has a good heat dissipation function, is simple to process and is low in cost.

Description

Liquid cooling plate, battery box and battery pack

Technical Field

The utility model relates to a power battery and energy storage technical field especially relate to a liquid cooling board, battery box and battery package.

Background

Certain charging and discharging behaviors can occur in the using process of the power battery and the energy storage battery, meanwhile, the situation of heating of the batteries is accompanied, and in order to ensure the comprehensive performance and the service life of the power battery or the energy storage battery, heat generated by the power battery or the energy storage battery needs to be dissipated in time.

In order to timely dissipate heat generated by the power battery or the energy storage battery, the liquid cooling plate is generally adopted for heat dissipation in the prior art, the liquid cooling plate and the lower box body of the battery box are split, the liquid cooling plate occupies the space of the battery pack due to the structure, and the space utilization rate of the battery pack is reduced. And the liquid cooling plate adopts the mode of buried tube more, leads to liquid cooling plate thickness big, and weight is big, and processing is complicated, influences the energy density of battery box.

SUMMERY OF THE UTILITY MODEL

According to the utility model discloses an aspect, the utility model provides a liquid cooling board has better heat dissipation function, and processing is simple, and the cost is lower.

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

the liquid cooling plate comprises a body and a cover plate, wherein the body and the cover plate are connected in a sealing mode to form a closed cavity, the body comprises a refrigerant inlet, a refrigerant outlet and a plurality of first flow guide ribs, the closed cavity is divided into a plurality of flow channels which are communicated with each other through the first flow guide ribs, and the refrigerant inlet and the refrigerant outlet are communicated with the flow channels.

Optionally, the flow guide device further comprises a second flow guide rib, the second flow guide rib is arranged between every two adjacent first flow guide ribs, and the second flow guide rib extends along the length direction of the flow channel.

Optionally, the thickness of the second flow guiding rib is equal to the thickness of the first flow guiding rib.

Optionally, the top of the first flow guiding rib is connected with the cover plate in a sealing manner.

Optionally, the electric heating cooker further comprises a reinforcing rib, and the reinforcing rib is arranged on the body.

Optionally, the thickness of the reinforcing rib is 1.5mm-3mm.

Optionally, the reinforcing ribs are wave-shaped or fold-line-shaped.

Optionally, the thickness of the first flow guide rib is 10mm-12mm.

According to the utility model discloses a further aspect, the utility model discloses still provide a battery box, when not increasing the size of battery box, have better heat dissipation function, and processing is simple, and the cost is lower.

the battery box comprises an upper box body and the liquid cooling plate, wherein the upper box body and the liquid cooling plate are connected in a buckling mode to form the box body.

Optionally, a plurality of first connecting holes are formed in the upper box body, a plurality of second connecting holes are formed in the liquid cooling plate, a sealing element is arranged between the upper box body and the liquid cooling plate, a plurality of third connecting holes are formed in the sealing element, a fastening bolt penetrates through the first connecting holes, the third connecting holes and the second connecting holes to be in threaded connection with a nut, a limiting boss is arranged along the circumferential direction of the first connecting holes, and the top of the limiting boss abuts against the liquid cooling plate;

or a limiting boss is arranged along the circumferential direction of the second connecting hole, and the top of the limiting boss is abutted to the upper box body;

the outer surface of the limiting boss is tightly attached to the inner wall of the third connecting hole.

According to the utility model discloses a still another aspect, the utility model discloses provide a battery package again, when guaranteeing energy density, have better heat dissipation function.

a battery pack comprises a battery module and the battery box, wherein the battery module is installed in the battery box.

The utility model has the advantages that:

compared with the coil type liquid cooling plate in the prior art, on one hand, no additional pipeline is needed, and the weight of the liquid cooling plate is reduced; on the other hand, compared with the processing technology of the bent part of the pipeline, the liquid cooling plate can be processed in a die-casting forming mode, the technology is simple, and the cost is low.

Through with the integration of liquid cooling board on the battery box, compare with prior art additional setting up the liquid cooling board, can reduce the size of battery box, simultaneously, reduce the weight of battery box.

Drawings

Fig. 1 is a schematic structural view of a liquid cooling plate provided by the present invention;

fig. 2 is a schematic structural diagram of the body provided by the present invention;

fig. 3 is a schematic structural diagram of a battery box provided by the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A (seal not shown);

fig. 5 is a schematic structural diagram of a battery pack provided by the present invention.

In the figure:

100. an upper box body; 200. a liquid cooling plate; 210. a body; 211. a refrigerant inlet; 212. a refrigerant outlet; 213. A first flow guiding rib; 220. a cover plate; 230. a flow channel; 240. a second flow guiding rib; 250. reinforcing ribs; 300. Fastening a bolt; 400. a nut; 500. a limiting boss; 600. a battery module is provided.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating 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 embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The utility model provides a liquid cooling board has better heat dissipation function, and processing is simple, and the cost is lower.

Specifically, as shown in fig. 1 to 5, the liquid cooling plate includes a body 210 and a cover plate 220, and the body 210 and the cover plate 220 are hermetically connected to form a sealed chamber. The body 210 includes a refrigerant inlet 211, a refrigerant outlet 212, and a plurality of first flow guide ribs 213, wherein the plurality of first flow guide ribs 213 divide the sealed chamber into a plurality of flow channels 230, and the plurality of flow channels 230 are communicated with each other. The refrigerant inlet 211 and the refrigerant outlet 212 are communicated with the flow channel 230, a refrigerant can enter the flow channel 230 from the refrigerant inlet 211, then sequentially flows through each flow channel 230 along the flow direction of the flow channel 230 and then flows out from the refrigerant outlet 212, and in the process that the refrigerant flows through each flow channel 230, heat in the battery cell in contact with the liquid cooling plate 200 can be taken away, so that the purpose of cooling the battery cell is achieved, and the service life of the battery cell is prolonged.

Furthermore, the top of the first flow guiding rib 213 may be hermetically connected to the cover plate 220, so that, on one hand, the refrigerant may only flow according to the arrangement of the flow channel 230, but may not flow from a gap between the top of the first flow guiding rib 213 and the cover plate 220, which may increase the time for the refrigerant to flow in the bottom plate 200 and improve the heat dissipation effect; on the other hand, the connection uniformity between the body 210 and the cover plate 220 is improved, the phenomenon that the cover plate 220 is locally bulged due to long-term use is avoided, and the flatness of the cover plate 220 is ensured.

Optionally, in an embodiment, the cover plate 220 and the body 210, and the cover plate 220 and the first flow guiding rib 213 may be connected by friction welding, and friction welding has the advantages of good welding quality and high processing efficiency, and is convenient for realizing automatic production. In other embodiments, other methods may be used for connection, and the method may be selected according to actual needs.

Preferably, the thickness of the first flow guiding rib 213 may be 10mm to 12mm, and exemplarily, may be 10mm, 11mm, 12mm, or the like, which may be set according to actual needs.

Preferably, with continued reference to fig. 1, a second air-guide rib 240 may be further disposed, and the second air-guide rib 240 is disposed between the adjacent first air-guide ribs 213, and the second air-guide rib 240 extends along the length direction of the flow channel 230. More preferably, the second flow guiding rib 240 is parallel to the first flow guiding rib 213, and on one hand, the second flow guiding rib 240 plays a certain guiding role in the flow direction of the refrigerant; on the other hand, the second flow guiding ribs 240 can divide the flow channel 230 between the adjacent first flow guiding ribs 213 into two, and the cross-sectional area of the flow channel 230 divided by the second flow guiding ribs 240 is smaller than that of the original flow channel 230, so that the flow velocity of the refrigerant is increased by reducing the cross-sectional area, and the faster the flow velocity of the refrigerant is, the more heat is taken away in the same time, thereby improving the heat dissipation efficiency of the bottom plate 200.

Preferably, the second flow guide rib 240 is disposed at a middle position adjacent to the first flow guide rib 213, so that the flow rates of the refrigerant on both sides of the second flow guide rib 240 are the same.

Preferably, the thickness of the second flow guide rib 240 may be the same as the thickness of the first flow guide rib 213, so as to avoid a gap between the second flow guide rib 240 and the cover plate 220, so that the refrigerant flows out from the gap, and the operational reliability of the second flow guide rib 240 is affected.

As a preferable technical solution, the second flow guiding rib 240 may also be hermetically connected with the cover plate 220, which is beneficial to improving the connection uniformity between the cover plate 220 and the body 210 and ensuring the operational reliability of the cover plate 220; on the other hand, a gap between the cover plate 220 and the second flow guiding rib 240 is completely avoided, and the working reliability of the second flow guiding rib 240 is ensured.

Further, with continued reference to fig. 1, a stiffener 250 may also be provided on the body 210 for increasing the strength of the body 210. On the one hand, set up strengthening rib 250 and guarantee the intensity of body 210, can reduce body 210's thickness to a certain extent, be favorable to reducing the liquid cooling plate size, and then reduce the weight of liquid cooling plate.

Preferably, the thickness of the reinforcing rib 250 may be 1.5mm to 3mm, and exemplarily, may be 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, or the like, which may be set according to actual needs. Compared with the thicknesses of the first flow guide rib 213 and the second flow guide rib 240, the thickness of the reinforcing rib 250 is smaller, and the reinforcing rib 250 can be prevented from influencing the flow rate of the refrigerant.

Alternatively, in one embodiment, the ribs 250 may be undulating in shape. In another embodiment, the shape of the reinforcing ribs 250 may also be a dogleg shape; in other embodiments, the shape of the reinforcing rib 250 can be other shapes, and the reinforcing rib can be arranged according to actual needs.

In this embodiment, the reinforcing rib 250 is in a zigzag shape, the reinforcing rib 250 is disposed in the flow channel 230, and the second flow guiding rib 240 is disposed in the middle of the reinforcing rib 250.

Preferably, as shown in fig. 2, a direction indicated by an arrow in the figure is a flow direction of the refrigerant, and in this embodiment, the refrigerant flows according to a serpentine path, which is beneficial to extending a flow path of the refrigerant and improving heat dissipation efficiency.

The utility model also provides a battery box has better heat dissipation function when not increasing the battery box size.

Specifically, as shown in fig. 3, the battery box includes an upper case 100 and the liquid cooling plate 200. The upper case 100 and the liquid cooling plate 200 are snap-coupled to form a case.

Through the integration of liquid cooling board 200 that will have the heat dissipation function on the box, need not additionally to install heat abstractor in the battery box and can guarantee the operating temperature of electric core, and then compare with the battery box of installation heat abstractor, can reduce the size, reduce weight, and simple structure is favorable to reduce cost.

Preferably, in order to ensure the flatness of the inside of the battery case, the side of the bottom plate 200 adjacent to the upper case 100 is a flat surface. In the embodiment, the body 210 of the liquid-cooling plate 200 is close to the upper box 100, so that compared with the cover plate 220 of the liquid-cooling plate 200 being close to the upper box 100, the connection difficulty between the body 210 and the cover plate 220 and the processing difficulty of the cover plate 220 are reduced.

Further, as shown in fig. 3 and 4, the upper tank 100 and the liquid cooling plate 200 may be connected by bolts, and a sealing member may be disposed between the upper tank 100 and the liquid cooling plate 200 to improve the sealing performance between the upper tank 100 and the liquid cooling plate 200 and prevent external water from entering the battery box to cause a short circuit of the battery. Specifically, a plurality of first connecting holes may be formed in the upper case 100, the first connecting holes may be arranged along a circumferential interval of the upper case 100, a plurality of second connecting holes may be formed in the liquid cooling plate 200, the second connecting holes may be arranged along a circumferential interval of the liquid cooling plate 200, a plurality of third connecting holes may be formed in the sealing member, the third connecting holes may be arranged along a circumferential interval of the sealing member, and the fastening bolt 300 may be threadedly connected to the nut 400 through the first connecting holes, the third connecting holes and the second connecting holes.

Because the size of battery box is great, and the fastening bolt 300 that uses is more, consequently, hardly guarantee that every fastening bolt 300's fastening force is the same, and the fastening force difference of bolt can lead to the deformation volume difference everywhere of sealing member, and then makes the sealing performance everywhere between last box 100 and the liquid cooling plate 200 differ, is unfavorable for the sealed between last box 100 and the liquid cooling plate 200. Therefore, in one embodiment, the limiting boss 500 may be disposed along the circumferential direction of the first connection hole, and when the liquid cooling plate is installed, the top of the limiting boss 500 abuts against the liquid cooling plate 200, so that the compression amount of the sealing member is limited by the thickness of the limiting boss 500, and the sealing performance between the upper case 100 and the liquid cooling plate 200 can be ensured. In order to achieve thorough sealing between the upper case 100 and the liquid cooling plate 200, the outer surface of the limiting boss 500 may be closely attached to the inner wall of the third connecting hole, so as to prevent external water from entering the inside of the case through a gap between the limiting boss 500 and the sealing member. In other embodiments, the limiting boss 500 may be disposed along the circumferential direction of the second connecting hole, and during installation, the top of the limiting boss 500 abuts against the upper case 100, and the compression amount of the sealing member is limited by the thickness of the limiting boss 500, so that the sealing performance between the upper case 100 and the liquid cooling plate 200 can be ensured. In order to achieve complete sealing between the upper case 100 and the bottom plate 200, the outer surface of the limiting boss 500 may be closely attached to the inner wall of the third connecting hole, so as to prevent external water from entering the battery case through a gap between the limiting boss 500 and the sealing member.

Further, as shown in fig. 5, the present invention further provides a battery pack, which includes a battery module 600 and the battery box. Wherein the battery module 600 is mounted in a battery box.

It is obvious that the above embodiments of the present invention are only 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, and 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. The liquid cooling plate is characterized by comprising a body (210) and a cover plate (220), wherein the body (210) and the cover plate (220) are connected in a sealing mode to form a closed cavity, the body (210) comprises a refrigerant inlet (211), a refrigerant outlet (212) and a plurality of first flow guide ribs (213), the closed cavity is divided into a plurality of flow channels (230) which are communicated with each other through the first flow guide ribs (213), and the refrigerant inlet (211) and the refrigerant outlet (212) are communicated with the flow channels (230).

2. The liquid cooling plate of claim 1, further comprising a second flow guiding rib (240), wherein the second flow guiding rib (240) is disposed between two adjacent first flow guiding ribs (213), and the second flow guiding rib (240) extends along a length direction of the flow channel (230).

3. A liquid-cooled plate according to claim 2, characterized in that the thickness of the second flow-guiding ribs (240) is equal to the thickness of the first flow-guiding ribs (213).

4. The liquid cold plate according to claim 1, wherein the top of said first flow guiding rib (213) is sealingly connected to said cover plate (220).

5. The liquid cold plate of claim 1, further comprising a stiffener (250), said stiffener (250) being disposed on said body (210).

6. Liquid-cooled panel according to claim 5, characterized in that the thickness of the reinforcing ribs (250) is 1.5-3 mm.

7. The liquid cooling plate of claim 5, wherein the reinforcing ribs (250) are wave-shaped or fold-line-shaped.

8. Liquid-cooled panel according to claim 5, characterized in that the thickness of the first flow-guiding ribs (213) is 10-12 mm.

9. A battery box, characterized in that, comprising an upper box body (100) and a liquid cooling plate (200) according to any one of claims 1-8, wherein the upper box body (100) and the liquid cooling plate (200) are connected in a snap-fit manner to form a box body.

10. The battery box according to claim 9, wherein a plurality of first connecting holes are formed in the upper box body (100), a plurality of second connecting holes are formed in the liquid cooling plate (200), a sealing member is arranged between the upper box body (100) and the liquid cooling plate (200), a plurality of third connecting holes are formed in the sealing member, a fastening bolt (300) penetrates through the first connecting holes, the third connecting holes and the second connecting holes to be in threaded connection with a nut (400), a limiting boss (500) is arranged along the circumferential direction of the first connecting holes, and the top of the limiting boss (500) is abutted to the liquid cooling plate (200);

or a limiting boss (500) is arranged along the circumferential direction of the second connecting hole, and the top of the limiting boss (500) is abutted against the upper box body (100);

the outer surface of the limiting boss (500) is tightly attached to the inner wall of the third connecting hole.

11. A battery pack, characterized by comprising a battery module (600) and a battery box according to claim 9 or 10, the battery module (600) being mounted to the battery box.