CN217955965U - Immersed battery pack - Google Patents

Abstract

The utility model relates to a battery technology field especially relates to an submergence formula battery package, including battery box and battery, be provided with heat transfer medium in the battery box, the battery sets up in the battery box and at least partial submergence in heat transfer medium, and the battery includes explosion-proof valve, and the battery has non-submergence region in explosion-proof valve department, and non-submergence region is not by heat transfer medium submergence. Through the structure design, the utility model discloses can prevent that explosion-proof valve pressure release from directly spouting heat transfer medium when spraying and fly, cause liquid to spatter all around, influence the performance of battery package, can avoid heat transfer medium to get into inside the battery via explosion-proof valve simultaneously, avoid the battery to produce serious damage, promote the reliability and the security of battery package.

Description

Immersed battery pack

Technical Field

The utility model relates to a battery technology field especially relates to an submergence formula battery package.

Background

In the existing immersed battery pack, a cooling medium is arranged in a battery box, and a battery is immersed in the cooling medium and can exchange heat with the battery by utilizing the cooling medium. The top of battery is provided with explosion-proof valve, and explosion-proof valve submerges in coolant along with the battery together, and when the battery takes place thermal runaway and makes explosion-proof valve pressure release jet current, inside coolant can get into the battery through ruptured explosion-proof valve, leads to the battery to seriously damage, has great potential safety hazard.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to overcome at least one of the above-mentioned drawbacks of the prior art and to provide an immersion battery pack which can prevent the heat transfer medium from entering the battery.

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

according to an aspect of the utility model, a submergence formula battery package is provided, including battery box and battery, be provided with heat transfer medium in the battery box, the battery set up in battery box and at least partial submergence in among the heat transfer medium, its characterized in that, the battery includes explosion-proof valve, the battery in explosion-proof valve department has the non-submergence region, the non-submergence region not by heat transfer medium submergence.

According to the above technical scheme, the utility model provides an advantage and positive effect of submergence formula battery package lie in:

the utility model provides an submergence formula battery package includes battery box and battery, is provided with heat transfer medium in the battery box, and the battery sets up in the battery box and at least partial submergence in heat transfer medium, and the battery includes explosion-proof valve, and the battery has non-submergence region in explosion-proof valve department, and non-submergence region is not submerged by heat transfer medium. Through the structure design, the utility model discloses can prevent that explosion-proof valve pressure release from directly spouting heat transfer medium when spraying and fly, cause liquid to spatter all around, influence the performance of battery package, can avoid heat transfer medium to get into inside the battery via explosion-proof valve simultaneously, avoid the battery to produce serious damage, promote the reliability and the security of battery package.

Drawings

The various objects, features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the invention, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary of the invention and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:

fig. 1 is a schematic perspective view of an immersion battery pack according to an exemplary embodiment;

fig. 2 is a schematic perspective view of another angle of the submerged battery pack shown in fig. 1;

FIG. 3 is a schematic cross-sectional view of the submerged battery pack shown in FIG. 1;

fig. 4 and 5 are schematic cross-sectional views of a submerged battery pack according to other two exemplary embodiments, respectively.

The reference numerals are illustrated below:

100. a battery box;

110. a first liquid inlet;

120. a first liquid outlet;

200. a battery;

210. an explosion-proof valve;

220. a guard ring;

230. a pressure relief channel;

300. a heat exchange medium;

400. a heat exchange plate;

401. a heat exchange channel;

410. a second liquid inlet;

420. a second liquid outlet;

G. a gap;

H1. a height;

H2. a height difference;

s. liquid level;

x. a first direction;

y. a second direction.

Detailed Description

Exemplary embodiments that embody features and advantages of the invention are described in detail below. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature and not as restrictive.

In the following description of various exemplary embodiments of the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the invention may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized, and structural and functional modifications may be made without departing from the scope of the present invention. Moreover, although the terms "over," "between," "within," and the like may be used in this specification to describe various example features and elements of the invention, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples described in the figures. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures to fall within the scope of the invention.

Referring to fig. 1, a schematic perspective view of an immersed battery pack is representatively illustrated. In this exemplary embodiment, the immersed battery pack provided by the present invention is described by way of example as applied to an in-vehicle battery. It will be readily appreciated by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the embodiments described below in order to apply the inventive related designs to other types of submerged battery packs, and still fall within the scope of the principles of the present submerged battery packs.

As shown in fig. 1, in an embodiment of the present invention, the immersed battery pack includes a battery box 100 and a battery 200, a heat exchange medium 300 is disposed in the battery box 100, and the battery 200 is disposed in the battery box 100 and at least partially immersed in the heat exchange medium 300. Referring to fig. 2 and 3 in combination, fig. 2 representatively illustrates a schematic perspective view of another angle of an immersed battery pack which can embody principles of the present invention; a schematic cross-sectional view of an immersed battery pack that can embody principles of the present invention is representatively illustrated in fig. 3, and for ease of understanding and explanation, specific structural details of some components are simplified in fig. 2, and the relative arrangement of the battery case 100, the battery 200, and the heat exchange medium 300 is exemplarily illustrated. The structure, connection mode and functional relationship of the main components of the immersed battery pack according to the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 3, in an embodiment of the present invention, the battery 200 includes an explosion-proof valve 210, and the battery 200 has a non-submerged region at the explosion-proof valve 210, which is not submerged by the heat exchange medium 300. Through the structure design, the utility model discloses can prevent that explosion-proof valve 210 pressure release from directly splashing heat transfer medium 300 when spraying, cause liquid to spatter all around, influence the performance of battery package, can avoid heat transfer medium 300 to get into battery 200 through explosion-proof valve 210 inside simultaneously, avoid battery 200 to produce serious damage, promote the reliability and the security of battery package.

It should be noted that, in the drawings of the embodiments shown in fig. 3 to 5, the explosion-proof valve 210 protrudes from the top surface of the battery 200, and this illustrated structure is intended to facilitate understanding and explaining the position and structural relationship of the explosion-proof valve 210, and is not intended to limit the relationship between the explosion-proof valve 210 and the top surface of the battery 200 or the height relationship between the explosion-proof valve 210 and other structures (such as a battery post). For example, in some embodiments of the present invention, the top of the explosion-proof valve 210 may also be recessed in the top surface of the battery 200, or flush with the top surface of the battery 200. In addition, the above description of the explosion-proof valve 210 refers to an explosion-proof valve assembly in an actual product as a whole, and the explosion-proof valve assembly may include, for example, a valve port, a valve plate, a protection cover, etc., and the valve port and the valve plate are usually located below the top surface of the battery 200, i.e. only the protection cover may be exposed from the top surface of the battery 200. Of course, the explosion-proof valve assembly including various possible components is considered as a whole, and the description of the whole structure is the description angle of the explosion-proof valve 210 in the specification, and the description is given here.

As shown in fig. 3, in an embodiment of the present invention, the liquid level S of the heat exchange medium 300 may be lower than the height of the explosion-proof valve 210. Accordingly, the region of the battery 200 where the explosion-proof valve 210 is provided forms a non-submerged region.

As shown in fig. 3, in an embodiment of the present invention, a height difference H2 between the liquid surface S of the heat exchange medium 300 and the explosion-proof valve 210 may be 7mm to 10mm, for example, 7mm, 8mm, 9mm, 10mm, and the like. Through the structure design, the utility model discloses can avoid reducing battery 200 submergence heat transfer effect because of difference in height H2 is too big leading to heat transfer medium 300, can avoid simultaneously leading to heat transfer medium 300 because of the difference in height H2 undersize because of rock etc. reason submergence explosion-proof valve 210. In some embodiments, the height difference H2 between the liquid level S of the heat exchange medium 300 and the explosion-proof valve 210 may also be less than 7mm, or may be greater than 10mm, for example, 6mm, 11mm, and the like, which is not limited to this embodiment.

As shown in fig. 3, in an embodiment of the present invention, the explosion-proof valve 210 may be located at the top of the battery 200. On this basis, based on the structural design that the height of the liquid level S of the heat exchange medium 300 is lower than that of the explosion-proof valve 210, the liquid level S of the heat exchange medium 300 may be further lower than the top of the battery 200, so that the top of the battery 200 defines the non-submerged region as described above. In some embodiments, the explosion-proof valve 210 may also be located at other positions of the battery 200, such as a side surface, and is not limited to this embodiment.

Referring to fig. 4, a schematic cross-sectional view of an immersed battery pack, which can embody principles of the present invention, in another embodiment is representatively illustrated in fig. 4.

As shown in fig. 4, in an embodiment of the present invention, still taking the case that the explosion-proof valve 210 is located at the top of the battery 200 as an example, the top of the battery 200 may be provided with a guard ring 220, the guard ring 220 is disposed around the explosion-proof valve 210, and the height of the guard ring 220 is higher than that of the explosion-proof valve 210. Through the structure design, the utility model discloses can utilize guard ring 220 to provide for explosion-proof valve 210 and shelter from the function, avoid heat transfer medium 300 to get into explosion-proof valve 210 department.

As shown in fig. 4, based on the structural design that the explosion-proof valve 210 is located at the top of the battery 200 and the top of the battery 200 is provided with the guard ring 220, in an embodiment of the present invention, the liquid level S of the heat exchange medium 300 may be lower than the height of the explosion-proof valve 210, i.e. lower than the top surface of the battery 200. In some embodiments, by using the shielding function of the protection ring 220, the liquid level S of the heat exchange medium 300 may also be higher than the height of the explosion-proof valve 210 and lower than the height of the protection ring 220, thereby achieving complete immersion of the region at the top surface of the battery 200 except the explosion-proof valve 210, which is not limited by the present embodiment.

Referring to fig. 5, a schematic cross-sectional view of an immersed battery pack in another embodiment that can embody principles of the present invention is representatively illustrated in fig. 5.

As shown in fig. 5, in an embodiment of the present invention, the immersed battery pack may further include a pressure relief channel 230. Specifically, the lower end of the pressure relief passage 230 is connected to the explosion-proof valve 210, that is, the lower end of the pressure relief passage 230 covers the explosion-proof valve 210, and the upper end of the pressure relief passage 230 extends to the top of the battery box 100, for example, to the heat exchange plate 400, so as to form the non-submerged region. Through the above structural design, although the embodiment shown in fig. 5 is described by taking the explosion-proof valve 210 located at the top of the battery 200 as an example, no matter where the explosion-proof valve 210 is located in the battery 200, the present invention can utilize the pressure relief channel 230 to realize the enclosure of the explosion-proof valve 210, so as to form the non-submerged region. On this basis, the utility model discloses can realize being full of heat transfer medium 300 to all spaces except pressure release channel 230 in battery box 100, be favorable to further promoting the heat transfer effect of submergence formula battery package.

As shown in fig. 1 and 3, in an embodiment of the present invention, a heat exchange plate 400 is disposed on a top of the battery box 100, and the heat exchange plate 400 can be used to conduct heat out of the battery box 100. A gap G is formed between the liquid surface S of the heat exchange medium 300 and the heat exchange plate 400, and the liquid heat exchange medium 300 in the boiling state is in contact with the heat exchange plate 400. Through the structure design, the utility model discloses can make the liquid heat transfer medium 300 direct contact heat transfer board 400 under the boiling state, promote the heat exchange efficiency between heat transfer medium 300 and the heat transfer board 400 in view of the above, guarantee to utilize heat transfer board 400 in time to derive the heat, be favorable to realizing quick, abundant heat transfer effect.

As shown in fig. 3, based on the structural design of the gap G between the liquid level S of the heat exchange medium 300 and the heat exchange plate 400, in an embodiment of the present invention, the height H1 of the gap G between the liquid level S of the heat exchange medium 300 and the heat exchange plate 400 may be 5mm to 15mm, for example, 5mm, 10mm, 12mm, 15mm, etc. Through the structure design, the utility model discloses can avoid because of the high H1 undersize of clearance G to lead to in the battery box 100 supplying heat transfer medium 300 to be heated the expanded headspace not enough, can avoid simultaneously leading to liquid heat transfer medium 300 under the boiling state can not contact with heat transfer board 400 because of the high H1 of clearance G is too big. In some embodiments, the height H1 of the gap G between the liquid level S of the heat exchange medium 300 and the heat exchange plate 400 may also be less than 5mm, or may be greater than 15mm, such as 4.9mm, 15.5mm, and the like, and is not limited by this embodiment.

As shown in fig. 1 to 3, in an embodiment of the present invention, the heat exchange plate 400 may be a cover plate of the battery box 100. Through the structure design, the utility model discloses when utilizing heat transfer board 400 to realize heat exchange, can regard heat transfer board 400 as the usefulness of apron, need not additionally to set up the independent case lid of sealing battery box 100, be favorable to simplifying the structure, alleviate product weight, reduce cost.

As shown in fig. 1 and 2, in an embodiment of the present invention, the battery box 100 may be provided with a first inlet 110 and a first outlet 120. Specifically, the first inlet 110 and the first outlet 120 are respectively connected to the cavity of the battery box 100, so that the heat exchange medium 300 can circulate through the first inlet 110, the cavity and the first outlet 120. Through the structure design, the utility model discloses can realize the circulation heat transfer of heat transfer medium 300 in battery box 100, further promote the heat transfer effect of battery package.

As shown in fig. 1 and fig. 2, based on the structural design that the battery box 100 is provided with the first inlet 110 and the first outlet 120, in an embodiment of the present invention, the first inlet 110 and the first outlet 120 may be respectively disposed on two opposite sides of the battery box 100. For example, the battery box 100 may include a bottom plate and a side plate, the side plate is formed by enclosing a plurality of side walls, and on this basis, the "two opposite sides of the battery box 100" may be understood as two side walls oppositely arranged in the side plate. Through the structure design, the utility model discloses can prolong heat transfer medium 300 through the route of first inlet 110, cavity and the circulation of first liquid outlet 120 for heat transfer medium 300's heat transfer is more abundant, further promotes the heat transfer effect of battery package.

As shown in fig. 1 and fig. 2, in an embodiment of the present invention, a heat exchange channel 401 is disposed inside a heat exchange plate 400, and the heat exchange plate 400 is provided with a second liquid inlet 410 and a second liquid outlet 420. Accordingly, the heat exchange liquid can circulate through the second liquid inlet 410, the heat exchange channel 401 and the second liquid outlet 420. Through the structure design, the utility model discloses can utilize the heat transfer liquid of heat transfer board 400 mesocycle circulation, realize with the heat transfer of the inside heat transfer medium 300 of battery box 100, further promote the heat transfer effect of battery package.

As shown in fig. 1 and fig. 2, the structural design based on the heat exchange plate 400 having the second inlet 410 and the second outlet 420 may be adopted in an embodiment of the present invention, the second inlet 410 and the second outlet 420 may be respectively disposed on the same side of the heat exchange plate 400. Through the structure design, the utility model discloses can prolong the route of heat-transfer liquid via second inlet 410, heat transfer passageway 401 and second liquid outlet 420 circulation for the heat transfer of heat-transfer liquid is more abundant, further promotes the heat transfer effect of battery package.

As shown in fig. 1 and fig. 2, in an embodiment of the present invention, the battery box 100 and the heat exchange plate 400 may be respectively provided with a liquid inlet and a liquid outlet, that is, the battery box 100 is provided with a first liquid inlet 110 and a first liquid outlet 120, and the heat exchange plate 400 is provided with a second liquid inlet 410 and a second liquid outlet 420. Through the structure design, the utility model discloses can utilize the circulation of the heat transfer medium 300 in the circulation of the heat transfer liquid in the heat transfer board 400 and the box to constitute the heat transfer system of dual cycle to further strengthen the heat transfer effect of battery package 100. In some embodiments, the present invention may also adopt a structural design that only the first inlet 110 and the first outlet 120 are disposed on the battery box 100, or a structural design that only the second inlet 410 and the second outlet 420 are disposed on the heat exchange plate 400, which is not limited to this embodiment.

As shown in fig. 1 and fig. 2, based on the structural design of the above-mentioned double-circulation heat exchange system, in an embodiment of the present invention, the first inlet 110 and the first outlet 120 may be respectively disposed on two opposite sides of the battery box 100 along the first direction X, and the second inlet 410 and the second outlet 420 may be respectively disposed on the same side of the heat exchange plate 400 along the second direction Y, wherein the first direction X is perpendicular to the second direction Y. In addition, the second liquid inlet port 410 and the second liquid outlet port 420 may be spaced along the first direction X, for example, they may be respectively located at two corners of the same side of the heat exchange plate 400 along the second direction Y. The utility model discloses can make each inlet and each liquid outlet more reasonable in arranging of battery package, and when the battery package adopted the structural design of two circulation heat transfer, above-mentioned structural design can prolong coolant liquid and coolant's circulation route and heat transfer area of contact, further promotes the heat transfer effect. In some embodiments, when the first inlet port 110 and the first outlet port 120 are respectively disposed on two opposite sides of the battery box 100 along the first direction X, the second inlet port 410 and the second outlet port 420 may also be respectively disposed on two opposite sides of the heat exchange plate 400 along the second direction Y, which is not limited in this embodiment.

It should be noted herein that the submerged battery packs illustrated in the drawings and described in this specification are only a few examples of the many types of submerged battery packs that can employ the principles of the present invention. It should be clearly understood that the principles of the present invention are in no way limited to any of the details or any of the components of the submerged battery pack shown in the drawings or described in this specification.

To sum up, the utility model provides an submergence formula battery package includes battery box 100 and battery 200, is provided with heat transfer medium 300 in the battery box 100, and battery 200 sets up in battery box 100 and at least partial submergence in heat transfer medium 300, and battery 200 includes explosion-proof valve 210, and battery 200 has the non-submergence region in explosion-proof valve 210 department, and the non-submergence region is not submerged by heat transfer medium 300. Through the structure design, the utility model discloses can prevent that explosion-proof valve 210 pressure release from directly splashing heat transfer medium 300 when spraying, cause liquid to spatter all around, influence the performance of battery package, can avoid heat transfer medium 300 to get into battery 200 through explosion-proof valve 210 inside simultaneously, avoid battery 200 to produce serious damage, promote the reliability and the security of battery package.

Exemplary embodiments of an immersion battery pack as set forth in the present disclosure are described and/or illustrated in detail above. Embodiments of the invention are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or step of one embodiment can also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. described and/or illustrated herein, the articles "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. Furthermore, the terms "first" and "second" and the like in the claims and the description are used merely as labels, and are not numerical limitations of their objects.

While the present invention has been described in terms of various specific embodiments, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.

Claims (11)

1. The immersed battery pack comprises a battery box and a battery, wherein a heat exchange medium is arranged in the battery box, the battery is arranged in the battery box and at least partially immersed in the heat exchange medium, the immersed battery pack is characterized in that the battery comprises an explosion-proof valve, the battery is provided with a non-immersion area at the explosion-proof valve, and the non-immersion area is not immersed by the heat exchange medium.

2. The submerged battery pack of claim 1, wherein the liquid level of the heat exchange medium is lower than the height of the explosion-proof valve.

3. An immersed battery pack according to claim 2, wherein the height difference between the liquid level of the heat exchange medium and the explosion-proof valve is 7-10 mm.

4. The submerged battery pack of claim 2, wherein the explosion-proof valve is located on top of the battery.

5. The submerged battery pack according to claim 1, characterized in that the top of the battery is provided with a guard ring, which is arranged around the explosion-proof valve, the height of the guard ring being higher than the height of the explosion-proof valve.

6. The submerged battery pack according to claim 1, further comprising a pressure relief channel, wherein the lower end of the pressure relief channel is connected to the explosion-proof valve, and the upper end of the pressure relief channel extends to the top of the battery box, so that the non-submerged region is formed.

7. An immersed battery pack according to any one of claims 1 to 6, wherein a heat exchange plate is arranged on the top of the battery box, a gap is formed between the liquid level of the heat exchange medium and the heat exchange plate, and the heat exchange medium in a boiling state is in contact with the heat exchange plate.

8. The submerged battery pack of claim 7, wherein the gap has a height of 5mm to 15mm.

9. The submerged battery pack of claim 7, wherein the heat exchange plate is a cover plate of the battery box.

10. An immersed battery pack according to any one of claims 1 to 5, wherein the battery box is provided with a first liquid inlet and a first liquid outlet for circulating the heat exchange medium.

11. An immersed battery pack according to claim 7, wherein the heat exchange plate is internally provided with a heat exchange channel, and the heat exchange plate is provided with a second liquid inlet and a second liquid outlet which are respectively communicated with the heat exchange channel for circulating a heat exchange liquid.

Images