CN220544015U

CN220544015U - Battery submergence cooling structure and battery package

Info

Publication number: CN220544015U
Application number: CN202321869763.0U
Authority: CN
Inventors: 陈建国; 刘峰; 陈保国; 彭月猛; 刘斌
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2023-07-17
Filing date: 2023-07-17
Publication date: 2024-02-27
Anticipated expiration: 2033-07-17

Abstract

The utility model relates to the technical field of power batteries, and discloses a battery immersed cooling structure and a battery pack. Wherein the battery submergence cooling structure comprises a battery box body. The battery box body is provided with a battery compartment, a plurality of battery cells are arranged in the battery compartment at intervals along a first direction, two sides of the battery compartment along a second direction are respectively provided with a channel side plate, the two channel side plates are respectively provided with a cooling channel, one end of the cooling channel is communicated with the battery compartment, and the other end of the cooling channel is communicated with the cooling medium supply device; the battery compartment further comprises a top plate and a bottom plate, a first gap is formed between the battery core and the top plate, a second gap is formed between the battery core and the bottom plate, the cooling medium supply device can convey cooling medium, the cooling medium enters the battery compartment through a cooling channel of one channel side plate and is conveyed into a cooling channel of the other channel side plate through a first path, a second path and a third path, the first gap forms a first path, a second path is formed between adjacent battery cores, and the second gap forms a third path.

Description

Battery submergence cooling structure and battery package

Technical Field

The utility model relates to the technical field of power batteries, in particular to a battery immersed cooling structure and a battery pack.

Background

With the development of new energy automobile industry, the market share of electric automobiles is higher and higher, and the safety is a main problem at present. The power batteries of the existing electric automobile all adopt the traditional design thought, only the heat insulation is adopted between the battery cores, no method is adopted to take away the heat, and only the environment is used for cooling, so that the occurrence probability of heat spreading is high. Moreover, the cooling system of the battery adopts the cold plate to be in single-sided contact with the battery cell, but the contact thermal resistance between the battery cell and the cold plate is large, the cooling area of the battery cell is small, the heat exchange efficiency is low, and the cooling effect of the battery cell is poor.

Based on this, there is a need for a battery submerged cooling structure and a battery pack to solve the above-mentioned problems.

Disclosure of Invention

Based on the above, the utility model aims to provide a battery immersed cooling structure, which has large contact area between a cooling medium and a battery core, small contact thermal resistance between the cooling medium and the battery core, improves heat exchange efficiency, can rapidly take away heat by the cooling medium, and improves cooling effect on the battery core.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

in one aspect, there is provided a battery submerged cooling structure comprising:

the battery box body is provided with a battery compartment, a plurality of battery cores are arranged in the battery compartment at intervals along a first direction, two sides of the battery compartment along a second direction are respectively provided with a channel side plate, the two channel side plates are both provided with cooling channels, one end of each cooling channel is communicated with the battery compartment, and the other end of each cooling channel is communicated with a cooling medium supply device;

the battery compartment further comprises a top plate and a bottom plate, a first gap is formed between the battery core and the top plate, a second gap is formed between the battery core and the bottom plate, the cooling medium supply device can convey cooling medium, the cooling medium enters the battery compartment through the cooling channel of one channel side plate and is conveyed into the cooling channel of the other channel side plate through a first path, a second path and a third path, the first gap forms the first path, a second path is formed between adjacent battery cores, and the second gap forms the third path.

As a preferred technical scheme of the battery immersed cooling structure, the battery immersed cooling structure further comprises a plurality of second heat insulation plates, and the two sides of any battery cell are provided with the second heat insulation plates.

As a preferred technical scheme of the battery immersed cooling structure, concave parts are arranged on two sides of the second heat insulation plate, and the concave parts form the second path.

As a preferred technical scheme of battery submergence cooling structure, still include a plurality of aluminium rows, the both ends of electric core along the second direction are provided with the utmost point post respectively, and is adjacent the utmost point post welding of electric core is in an aluminium row, be provided with a plurality of liquid flow holes along the third direction interval on the aluminium row, liquid flow hole just to adjacent the clearance of electric core.

As a preferred technical scheme of the battery immersed cooling structure, the battery immersed cooling structure further comprises an insulating sheet, wherein the insulating sheet is positioned between the channel side plate and the aluminum row, a kidney-shaped hole extending along a third direction is formed in the insulating sheet, the liquid flow hole is opposite to the kidney-shaped hole, and the second path is communicated with the cooling channel through the liquid flow hole and the kidney-shaped hole.

As a preferable technical scheme of the battery immersed cooling structure, an insulating layer is arranged on one side of the aluminum row, which faces the insulating sheet.

As a preferable technical scheme of the battery submerged cooling structure, the aluminum row is provided with an observation hole for observing the welding state of the aluminum row and the pole.

As a preferable technical scheme of the battery immersed cooling structure, the second heat insulation plate is made of mica plates, ceramics or silica gel pads.

As a preferable technical scheme of the battery immersed cooling structure, the battery box body is provided with an electrical appliance maintenance bin, and the electrical appliance maintenance bin is separated from the battery bin through a partition plate.

In another aspect, a battery pack is provided that includes a battery submersion cooling structure as described in any of the above aspects.

The beneficial effects of the utility model are as follows:

the utility model provides a battery immersed cooling structure and a battery pack, wherein when the battery immersed cooling structure is in operation, a cooling medium supply device can be used for conveying cooling medium, the cooling medium enters a battery compartment through a cooling channel of one channel side plate, is conveyed into a cooling channel of the other channel side plate through a first path, a second path and a third path, and is returned to the cooling medium supply device, so that the circulation of the cooling medium is realized. The first gap forms a first path, so that the top of the battery cell is cooled, a second path is formed between adjacent battery cells, the side part of the battery cell is cooled, the second gap forms a third path, and the bottom of the battery cell is cooled. According to the utility model, the battery cell is immersed in the cooling medium, so that the contact area between the cooling medium and the battery cell is large, namely the cooling area is large; the contact thermal resistance between the cooling medium and the battery cell is small, so that the heat exchange efficiency is improved, the cooling medium can rapidly take away heat, and the cooling effect on the battery cell is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic view of a battery pack according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a portion of a battery submerged cooling structure according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of the flow of cooling medium of a battery submerged cooling structure according to an embodiment of the present utility model;

FIG. 4 is a second exploded view of a portion of the structure of a battery submerged cooling structure according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a second heat shield according to an embodiment of the present utility model;

FIG. 6 is a schematic view of an aluminum row according to an embodiment of the present utility model;

fig. 7 is a schematic structural view of an insulating sheet according to an embodiment of the present utility model.

The figures are labeled as follows:

1. a battery case; 11. a battery compartment; 12. a channel side plate; 121. a cooling channel; 1211. a joint; 1212. an opening; 13. a top plate; 14. a bottom plate; 15. a partition plate; 16. a first path; 17. a second path; 18. a third path; 19. an electrical appliance maintenance bin;

2. a battery cell;

3. a second heat shield; 31. a recessed portion; 32. a heightening part;

4. an aluminum row; 41. a liquid flow hole; 42. an insulating layer; 43. an observation hole;

5. an insulating sheet; 51. waist-shaped holes;

6. and (3) a bracket.

Detailed Description

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

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The power batteries of the existing electric automobile all adopt the traditional design thought, only the heat insulation is adopted between the battery cores, no method is adopted to take away the heat, and only the environment is used for cooling, so that the occurrence probability of heat spreading is high. Moreover, the cooling system of the battery adopts the cold plate to be in single-sided contact with the battery cell, but the contact thermal resistance between the battery cell and the cold plate is large, the cooling area of the battery cell is small, the heat exchange efficiency is low, and the cooling effect of the battery cell is poor.

To solve the above-described problems, as shown in fig. 1 to 3, the present embodiment provides a battery pack including a battery submerged cooling structure including a battery case 1. Specifically, the battery box 1 is provided with a battery compartment 11, a plurality of battery cells 2 are arranged in the battery compartment 11 at intervals along a first direction, two sides of the battery compartment 11 along a second direction are respectively provided with a channel side plate 12, the two channel side plates 12 are respectively provided with a cooling channel 121, one end of the cooling channel 121 is communicated with the battery compartment 11, and the other end of the cooling channel 121 is communicated with a cooling medium supply device; the battery compartment 11 further comprises a top plate 13 and a bottom plate 14, a first gap is arranged between the battery cell 2 and the top plate 13, a second gap is arranged between the battery cell 2 and the bottom plate 14, the cooling medium supply device can convey cooling medium, the cooling medium enters the battery compartment 11 through a cooling channel 121 of one channel side plate 12 and is conveyed into the cooling channel 121 of the other channel side plate 12 through a first path 16, a second path 17 and a third path 18, the first gap forms the first path 16, a second path 17 is formed between adjacent battery cells 2, and the second gap forms the third path 18.

In operation, the cooling medium supply device is capable of delivering cooling medium, which enters the battery compartment 11 through the cooling channel 121 of one channel side plate 12, is delivered into the cooling channel 121 of the other channel side plate 12 through the first, second and third paths 16, 17 and 18, and is returned to the cooling medium supply device, thereby realizing circulation of the cooling medium. The first gap forms a first path 16, so that the top of the battery cell 2 is cooled, a second path 17 is formed between adjacent battery cells 2, the side of the battery cell 2 is cooled, the second gap forms a third path 18, and the bottom of the battery cell 2 is cooled. In the utility model, the battery cell 2 is immersed in the cooling medium, and the contact area of the cooling medium and the battery cell 2 is large, namely the cooling area is large; the contact thermal resistance between the cooling medium and the battery cell 2 is small, the heat exchange efficiency is improved, the cooling medium can rapidly take away heat, and the cooling effect on the battery cell 2 is improved.

In this embodiment, the cooling channel 121 extends along the first direction, the end face of one end of the channel side plate 12 along the first direction is provided with a connector 1211, the connector 1211 is communicated with the cooling channel 121, the side wall of the cooling channel 121 is provided with a plurality of openings 1212 along the first direction at intervals, and the cooling channel 121 is communicated with the battery compartment 11 through the openings 1212.

Preferably, as shown in fig. 4 and 5, the battery submerged cooling structure further comprises a plurality of second heat insulation plates 3, and both sides of any one of the battery cells 2 are provided with the second heat insulation plates 3. The second heat insulation plate 3 can insulate heat transfer between the battery cell 2 and the battery cell 2, and furthermore, the system is free from heat spreading, and the safety of the battery pack is improved. In this embodiment, the second heat insulation board 3 is made of a heat insulation material such as mica board, ceramic or silica gel pad, so as to realize heat insulation.

It is further preferred that both sides of the second heat insulating plate 3 are provided with concave portions 31, and the concave portions 31 form the second path 17. Wherein, a cavity flow channel is formed between the recess 31 and the battery cell 2 to form a second path 17. Preferably, the bottom of the second heat insulation plate 3 is provided with a raised portion 32, and the battery cell 2 is overlapped on the raised portion 32, so that a second gap is formed between the battery cell 2 and the bottom plate 14.

Further, as shown in fig. 3, 6 and 7, the battery immersed cooling structure further includes a plurality of aluminum rows 4, the two ends of the battery core 2 along the second direction are respectively provided with a pole, the poles of the adjacent battery cores 2 are welded on one aluminum row 4, so that the electrical connection of the adjacent battery cores 2 is realized, a plurality of liquid flow holes 41 are arranged on the aluminum row 4 along the third direction at intervals, and the liquid flow holes 41 are opposite to the gaps of the adjacent battery cores 2. The liquid flow hole 41 is used for the passage of the cooling medium and into the second path 17. The battery submerged cooling structure further comprises a plurality of brackets 6, and the aluminum row 4 can be fixed on the brackets 6. In this embodiment, the first direction is X, the second direction is Y, the third direction is Z, and the first direction, the second direction and the third direction are perpendicular to each other.

Preferably, the battery immersed cooling structure further comprises an insulating sheet 5, wherein the insulating sheet 5 is positioned between the channel side plate 12 and the aluminum row 4, so that insulation between the channel side plate 12 and the aluminum row 4 is realized, and the channel side plate 12 is prevented from being electrified; the insulating sheet 5 is provided with a kidney-shaped hole 51 extending in the third direction, the liquid flow hole 41 is opposite to the kidney-shaped hole 51, and the second path 17 communicates with the cooling passage 121 through the liquid flow hole 41 and the kidney-shaped hole 51. One of the insulating plates can cover a plurality of aluminum rows 4, a plurality of kidney-shaped holes 51 are formed in the insulating plate at intervals along the first direction, and the kidney-shaped holes 51 correspond to the aluminum rows 4 one by one.

The two ends of the battery cell 2 are respectively provided with an aluminum row 4, a bracket 6 and an insulating sheet 5. The cooling medium at one end of the battery can pass through the kidney-shaped hole 51, the liquid flow hole 41 and enter the second path 17 in this order, and then the cooling medium flows to the second end of the battery and flows out through the liquid flow hole 41 and the kidney-shaped hole 51 in this order.

Preferably, since the kidney-shaped holes 51 are provided, the portions between the adjacent liquid flow holes 41 are faced to the channel side plates 12, and in order to improve the insulating performance, the side of the aluminum row 4 facing the insulating sheet 5 is provided with the insulating layer 42, and the insulating layer 42 also plays an insulating role for the portions between the adjacent liquid flow holes 41, improving the insulating performance. Specifically, the insulating layer 42 may be a plastic layer added by a dipping process or a powder spraying process to form insulating powder on the surface of the aluminum row 4, so as to achieve the purpose of insulation.

Preferably, the aluminum row 4 is provided with an observation hole 43, and the observation hole 43 is used for observing the welding state of the aluminum row 4 and the pole, so that the operation convenience is improved.

Further preferably, as shown in fig. 2, the battery box 1 is provided with an electric service cabin 19, and the electric service cabin 19 and the battery cabin 11 are separated by a partition 15. The electrical equipment maintenance bin 19 can be provided with electrical equipment elements of a battery pack so that the electrical equipment elements are in a non-immersed state, and the electrical equipment elements in the electrical equipment maintenance bin 19 can be independently maintained, so that the electrical equipment maintenance bin 19 is convenient to disassemble and maintain, and the maintenance convenience is improved.

Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims

1. A battery submerged cooling structure, characterized by comprising:

the battery box body (1), the battery box body (1) is provided with a battery compartment (11), a plurality of battery cores (2) are arranged in the battery compartment (11) at intervals along a first direction, two sides of the battery compartment (11) along a second direction are respectively provided with a channel side plate (12), two channel side plates (12) are respectively provided with a cooling channel (121), one end of the cooling channel (121) is communicated with the battery compartment (11), and the other end of the cooling channel is communicated with a cooling medium supply device;

the battery compartment (11) further comprises a top plate (13) and a bottom plate (14), a first gap is arranged between the battery cell (2) and the top plate (13), a second gap is arranged between the battery cell (2) and the bottom plate (14), the cooling medium supply device can convey cooling medium, the cooling medium enters the battery compartment (11) through the cooling channel (121) of one channel side plate (12) and is conveyed into the cooling channel (121) of the other channel side plate (12) through a first path (16), a second path (17) and a third path (18), the first gap forms the first path (16), a second path (17) is formed between adjacent battery cells (2), and the second gap forms the third path (18).

2. The battery submerged cooling structure according to claim 1, further comprising a plurality of second heat insulation plates (3), wherein the second heat insulation plates (3) are provided on both sides of any one of the cells (2).

3. The battery submerged cooling structure according to claim 2, characterized in that both sides of the second heat insulating plate (3) are provided with recesses (31), the recesses (31) forming the second paths (17).

4. The battery immersed cooling structure according to claim 1, further comprising a plurality of aluminum rows (4), wherein the two ends of the battery cells (2) along the second direction are respectively provided with a pole, the poles of the adjacent battery cells (2) are welded to one aluminum row (4), a plurality of liquid flow holes (41) are arranged on the aluminum row (4) along the third direction at intervals, and the liquid flow holes (41) are opposite to the gaps of the adjacent battery cells (2).

5. The battery submerged cooling structure according to claim 4, further comprising an insulating sheet (5), the insulating sheet (5) being located between the passage side plate (12) and the aluminum row (4), a kidney-shaped hole (51) extending in the third direction being provided on the insulating sheet (5), the liquid flow hole (41) being opposite to the kidney-shaped hole (51), the second path (17) being communicated with the cooling passage (121) through the liquid flow hole (41) and the kidney-shaped hole (51).

6. The battery submerged cooling structure according to claim 5, characterized in that the side of the aluminum row (4) facing the insulating sheet (5) is provided with an insulating layer (42).

7. The battery submerged cooling structure according to claim 4, characterized in that the aluminum row (4) is provided with a viewing hole (43), the viewing hole (43) being used for viewing the welding state of the aluminum row (4) and the pole.

8. The battery submerged cooling structure according to claim 2, characterized in that the material of the second heat insulating plate (3) is mica plate, ceramic or silica gel pad.

9. The battery submerged cooling structure according to claim 1, characterized in that the battery box (1) is provided with an electrical service compartment (19), the electrical service compartment (19) and the battery compartment (11) being separated by a partition (15).

10. A battery pack comprising a battery submerged cooling structure according to any one of claims 1 to 9.