Submersible battery box

Abstract

This application relates to an immersion battery box. The immersion battery box may include: a box body comprising a top plate, a bottom plate, and side walls; a battery cell module comprising a plurality of battery cells arranged at intervals along a first direction and a second direction orthogonal to the first direction and housed within the box body; a plurality of isolation members disposed at intervals along the first and second directions, each isolation member having an opening through which immersion liquid flows along a third direction orthogonal to the plane defined by the first and second directions; and a plate member disposed between the battery cell module and the bottom plate of the box body, contacting the battery cell module and separated from the bottom plate by a gap, the plate member having a plurality of holes along the second direction corresponding to the openings of the plurality of isolation members, such that immersion liquid flows out of the isolation members through the holes.

Description

Technical Field

[0001] This application relates to the field of batteries, and more particularly to immersion battery boxes. Background Technology

[0002] With the development of new energy technologies, battery products are constantly pursuing high safety, long lifespan, and high charge-discharge conversion efficiency. Traditional battery products mostly employ heat dissipation mechanisms such as air cooling or indirect temperature control via liquid cooling plates. These mechanisms often struggle to ensure consistent temperature differences between cells within the battery pack, resulting in a significantly shorter system-level lifespan compared to the cell lifespan. Furthermore, traditional battery products typically cannot completely isolate the cells from the air. In the event of a fire, relying on built-in fire suppression systems (such as perfluorohexanone) can only slow the spread of the fire, not completely extinguish it. Summary of the Invention

[0003] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0004] In order to overcome the above-mentioned defects in the prior art, this application proposes an immersion battery box that can increase the contact area of ​​the battery cells with the immersion liquid in the battery box, thereby significantly improving the cooling efficiency of the battery cells and ensuring the consistency of temperature difference between the battery cells in the battery box.

[0005] One aspect of this application provides an immersion battery case, which may include: a case body, which may include a top plate, a bottom plate, and side walls; a battery cell module, which may include a plurality of battery cells, which may be arranged at intervals along a first direction and a second direction orthogonal to the first direction and housed within the case body; a plurality of isolation members, which may be disposed at intervals along the first and second directions, each isolation member may have an opening through which immersion liquid flows along a third direction, the third direction being orthogonal to the plane defined by the first and second directions; and a plate member, which may be disposed between the battery cell module and the bottom plate of the case body and contact the battery cell module and be separated from the bottom plate by a gap, the plate member may have a plurality of holes along the second direction corresponding to the openings of the plurality of isolation members, so that immersion liquid flows out of the isolation members through the holes.

[0006] In some examples, the isolation member may include: a first isolation sub-member that is disposed along a second direction or a first direction and contacts the battery cell, the first isolation sub-member being made of a thermally conductive material; and a second isolation sub-member that is accommodated within the first isolation sub-member and has an opening therein, the second isolation sub-member being made of an insulating material.

[0007] In some examples, the plate component may be made of insulating material.

[0008] In some examples, the opening of the isolation member may have a first width along a first direction or a second direction, and the plurality of holes of the plate member may each have a second width along the first direction, the second width being greater than or equal to the first width.

[0009] In some examples, the battery box may further include: a liquid inlet member disposed on a first side wall of the box body along a second direction and near the top plate of the box body; and a liquid outlet member disposed on the first side wall and near the bottom plate of the box body, so that the immersion liquid enters the battery box through the liquid inlet member, reaches the top of the battery cell, flows through the opening and the hole along a third direction through the isolation member and the plate member, and flows out of the battery box through the liquid outlet member.

[0010] In some examples, each of the plurality of holes has a first length along the second direction, and the plurality of holes have different sizes, the sizes being determined proportionally based on the distance of each hole from the first sidewall.

[0011] In some examples, the battery box may further include a support member disposed along a first direction and corresponding to the isolation member between the plate member and the bottom plate of the box.

[0012] In some examples, the support member may be a Z-beam, which may be made of metal and may have grooves formed to facilitate the flow of immersion liquid from the isolation member and plate member through the orifices toward the outlet member in a first direction.

[0013] In some examples, the battery box may further include a valve member disposed on the top plate of the battery box and configured to discharge gas from the battery box in response to the gas pressure inside the battery box exceeding a first threshold.

[0014] In some examples, the cell module includes a cell module with at least two cells connected in series.

[0015] In the immersion battery box of this application, by setting up isolation components and plate components, all surfaces of the battery cells except the bottom surface are in contact with the immersion liquid, thereby being cooled by the flow of the immersion liquid. This significantly improves the cooling efficiency of the battery box while mitigating the uneven temperature distribution of the battery cell modules and the issue of higher temperatures in the center of the cells. Furthermore, in the immersion battery box of this application, by further positioning the liquid inlet component near the top plate of the battery box and the liquid outlet component near the bottom plate, the flow of the immersion liquid within the battery box can fully utilize gravity. With the assistance of an external pump, the immersion liquid is propelled to circulate from top to bottom, improving the circulation efficiency of the immersion liquid and reducing power consumption. Furthermore, in the immersion battery box of this application, by setting up support components, the load-bearing capacity of the battery box is improved, and the material requirements for the battery box components are relaxed. Moreover, by setting up a groove, the flow of the immersion liquid from the bottom area of ​​the battery box to the liquid outlet component is enhanced, further improving the circulation efficiency of the immersion liquid. Furthermore, in the immersion battery box of this application, the immersion liquid completely submerges the battery cells to keep the cells isolated from the air, thereby improving the safety of the battery box. Attached Figure Description

[0016] The above-described features and advantages of this application can be better understood after reading the following detailed description of the embodiments in conjunction with the accompanying drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or features may have the same or similar reference numerals.

[0017] Figure 1 This is an external schematic diagram of an immersion battery box according to various aspects of this application; Figure 2 This is a structural diagram of an immersion battery box with the top panel of the box removed according to various aspects of this application; Figure 3 The submersible battery box is based on various aspects of this application. Figure 2 The structural diagrams of all battery cells were removed from the original design. Figure 4 The submersible battery box is based on various aspects of this application. Figure 2 The structural diagram of the three battery cell modules was removed from the original design. Figure 5 The submersible battery box is based on various aspects of this application. Figure 3 The structural diagram with the isolation components removed was based on the original design. Figure 6a and Figure 6b This is a structural schematic diagram of the isolation component in an immersion battery box according to various aspects of this application; Figure 7 This is a structural schematic diagram of the plate components in the immersion battery box according to various aspects of this application; Figure 8This is a schematic diagram illustrating the flow trajectory of the immersion liquid after entering the tank through the inlet component, according to various aspects of this application; Figure 9 This is a schematic diagram illustrating the flow trajectory of the immersion liquid in the isolation member and the plate member, according to various aspects of this application; Figure 10 This is a schematic diagram illustrating the flow trajectory of the immersion liquid in the bottom region of the tank and its exit from the tank via the discharge component, according to various aspects of this application; and Figure 11 This is a schematic side cross-sectional view illustrating the flow trajectory of the immersion liquid from entering the tank through the inlet member to leaving the tank through the outlet member, according to various aspects of this application.

[0018] Unless otherwise stated, it should be understood that modules / components referenced by the same / similar figures across various figures generally refer to the same module / component.

[0019] List of reference numerals in the attached diagram: 1: Immersion battery box; 11: Battery box top panel; 12: Battery box housing; 13: Liquid outlet component; 14: Valve components; 15: Liquid inlet component; 16: Isolation components; 17: Battery cell; 200: Plate component; 121: Supporting component; 122: Groove of supporting component; 166, 167: First isolation sub-component; 169: Second isolation sub-component; 170: Opening; 210: Hole section; 220: Screw hole; 310: The flow path of the immersion liquid on the top of the battery cell; 410: The flow path of the immersion fluid through the isolation components; 420: The flow path of the immersion liquid through the plate component; 430: The flow trajectory of the immersion liquid in the bottom area of ​​the tank. Detailed Implementation

[0020] The present application will be further described below with reference to specific embodiments and accompanying drawings, but this should not be construed as limiting the scope of protection of the present application. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present application as detailed in the appended claims.

[0021] The terms “comprising,” “including,” or any other variations thereof, as used herein, are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0022] The terms "first," "second," etc., used in this application are used to distinguish identical or similar items, without limiting the quantity or order. "At least one" as used in this application refers to one or more; "multiple" refers to two or more. "And / or" as used in this application describes the relationship between related objects. For example, A and / or B can represent the following situations: A exists alone; A and B exist simultaneously; B exists alone, where A and B can be singular or plural. The character " / " used in this application can indicate that the preceding and following related objects are in an "or" relationship. Additionally, the symbol " / " can also represent a division sign.

[0023] As used in this application, "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can represent the following: a, b, c; a and b; a and c; b and c; a, b, and c. Each of a, b, and c can be an element or a set containing one or more elements.

[0024] In this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or illustration. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0025] As mentioned above, traditional battery products suffer from inconsistent temperature differences between cells within the battery case and safety issues. To address these problems, this application proposes an immersion battery case that increases the contact area between the cells and the immersion liquid, thereby significantly improving the cooling efficiency of the cells and ensuring consistent temperature differences between them within the battery case.

[0026] This application provides an immersion battery box in various embodiments.

[0027] First refer to Figure 1 and Figure 2The submersible battery box 1 may include a box body 12, which may include a top plate 11, a bottom plate, and side walls. In some examples, the top plate 11 may be bolted to the box body 12 and seal the box body 12.

[0028] In various embodiments of this application, the battery box 1 may further include a cell module, which may include a plurality of cells 17. In some examples, the cell module includes a cell module with at least two cells connected in series. Figure 2 As shown, a plurality of battery cells 17 may be arranged at intervals along a first direction and a second direction orthogonal to the first direction and housed within the housing 12. In some examples, the battery cells 17 are arranged with gaps between them and the side walls and bottom plate of the housing 12 and housed within the housing 12. Figure 2 As shown, the first direction is along the longer side of the bottom plate of the housing 12, and the second direction is along the shorter side of the bottom plate of the housing 12. Figure 2 As shown, four battery cell modules are arranged at intervals along a first direction and housed within a housing 12, and each group of cells 17 is also spaced apart in a second direction. In some examples, the spacing between the cells 17 in the first direction may be the same as or different from the spacing in the second direction.

[0029] Further reference Figure 3 , Figure 6a and Figure 6b In various embodiments of this application, the battery box 1 may further include a plurality of isolation members 16. For example... Figure 2 and Figure 3 As shown, multiple isolation members 16 may be disposed within the gaps between the cells 17 along a first direction and a second direction. Each isolation member 16 may have an opening 170 for immersion liquid to flow through the isolation member 16 along a third direction. Figure 2 As shown, the third direction is orthogonal to the plane defined by the first and second directions, or the plane where the bottom plate of the box 12 is located. Figure 6a and Figure 6b As shown, the isolation members may include first isolation sub-members 166 and 167. The first isolation sub-members 166 and 167 may be disposed along a second direction and / or a first direction and contact the battery cell 17. In some examples, the first isolation sub-members 166 and 167 may be made of a thermally conductive material, including metals such as aluminum, stainless steel, etc. In some examples, the first isolation sub-members 166 and 167 may be metal sheets, with metal sheets 166 and 167 placed opposite each other and each contacting the corresponding battery cell 17. In some examples, the first isolation sub-members 166 and 167 may be aluminum plates with a thickness of approximately 0.5 mm. Figure 6a and Figure 6bAs further shown, the isolation member may include a second isolation sub-member 169. The second isolation sub-member 169 may be housed within the first isolation sub-members 166, 167 and wherein one or more openings 170 are formed. In some examples, the second isolation sub-member 169 may be made of an insulating material, such as an insulating material that does not physically and / or chemically react with the immersion liquid. In some examples, the second isolation sub-member 169 may be a G10 material (a composite material made of glass fiber and epoxy resin) with a thickness of about 1.5 mm. In cases where multiple openings 170 are formed in the second isolation sub-member 169, the openings 170 may be approximately 1.5 mm in length and width along a third direction. An 8mm channel allows the immersion liquid to flow downwards from the top of the cell along a third direction through the opening 170 into the insulating member 16. Since the first insulating sub-members 166 and 167 are in close contact with the cell 17 and thus have good thermal conductivity, the heat generated by the cell 17 can be dissipated by the immersion liquid flowing through the opening 170 into the insulating member 16, thereby achieving cooling of the cell 17.

[0030] Further reference Figure 4 and Figure 7 In various embodiments of this application, the battery box 1 may further include a plate member 200. The plate member 200 may be disposed between the battery cell 17 and the bottom plate of the box body 12, contacting the battery cell 17 and being spaced from the bottom plate by a third gap. That is, the plate member 200 may be positioned with a gap from the bottom plate of the box body 12, thereby forming a space between the battery cell 17 and the bottom plate of the box body 12. Figure 4 and Figure 7 As shown, the plate member 200 may have a plurality of holes 210 along the second direction corresponding to the openings 170 of the plurality of isolation members 16, allowing the immersion liquid to flow through the holes 210 out of the isolation members and the plate member 200 and into the space between the cell 17 and the bottom plate of the housing 12. In some examples, the plate member 200 may be made of an insulating material, such as an insulating material that does not physically and / or chemically react with the immersion liquid. In some examples, the material of the plate member 200 may be the same as or different from the material of the second isolation sub-member 169. In some examples, the plate member 200 can be connected by bolts (such as... Figure 7 It is fixed to the bottom of the housing 12 (as illustrated by screw hole 220 in the figure).

[0031] In various embodiments of this application, the battery box 1 may further include a liquid inlet component 15. For example... Figure 1 As shown, the liquid inlet component 15 can be disposed on the first side wall of the housing 12 along the second direction and near the top plate 11 of the housing 12. The battery box 1 may also include a liquid outlet component 13. The liquid outlet component 13 can be disposed on the first side wall and near the bottom plate of the housing 12. Figure 1In the example shown, after the battery box 1 is assembled, an immersion liquid is injected into the battery box 1 by an external pump. The immersion liquid enters the casing 12 of the battery box 1 through the inlet member 15 and reaches the top of the battery cell 17. Then, it flows through the opening 170 and the hole 210 across the surface of the battery cell 17, enters the space between the battery cell 17 and the bottom plate of the casing 12, and exits the casing 12 of the battery box 1 through the outlet member 13. In some examples, the immersion liquid is injected from top to bottom to make full use of the gravity of the immersion liquid itself. In some examples, the immersion liquid does not need to fill the entire casing 12, but only needs to exceed the height of the battery cell 17 in the casing 12 to ensure that the battery cell 17 is completely immersed in the immersion liquid. For example, the immersion liquid is injected into the casing 12 to exceed the height of the battery cell 17 by about 1 cm to ensure the safety of the battery box 1. In some examples, the liquid inlet component 15 may include a liquid inlet and a liquid inlet connector (not shown). The liquid inlet is located on the first side wall of the housing 12 and near the top of the battery cell 17 inside the housing 12, and communicates with the top space of the battery cell 17 via the liquid inlet connector. In some examples, the liquid outlet component 13 may include a liquid outlet and a liquid outlet connector (not shown). The liquid outlet is located on the first side wall of the housing 12 and near the bottom of the housing 12, and communicates with the space between the battery cell 17 and the bottom of the housing 12 via the liquid outlet connector.

[0032] For specific references Figure 8 , Figure 9 and Figure 10 , Figure 8 , Figure 9 and Figure 10 Schematic diagrams illustrating the flow paths of the immersion liquid within the tank 12 according to various aspects of this application are provided. Figure 8 , Figure 9 and Figure 10 As shown, when the external pump connected to the battery box 1 is turned on, the immersion liquid first flows into the box body 12 from the inlet member 15, with a flow trajectory as shown in 310. Then, the immersion liquid flows downward from the top of the battery cell 17 through the opening of the isolation member 16 under its own gravity, with a flow trajectory as shown in 410, and then flows into the space between the battery cell 17 and the bottom of the box body 12 through the hole 210 of the plate member 200, with a flow trajectory as shown in 420. Finally, the immersion liquid flows out of the box body 12 through the outlet member 13 to carry away the heat generated by the battery cell 17 from the box body 12, with a flow trajectory as shown in 430.

[0033] In various embodiments of this application, the opening 170 of the isolation member 16 may have a first width along a first direction or a second direction. When the isolation member 16 is arranged along the first direction, the opening 170 has a first width along the second direction. When the isolation member 16 is arranged along the second direction, the opening 170 has a first width along the first direction. In some examples, the first width of the isolation member 16 in the first direction or the second direction may be the same or different. In some examples, the range of the first width may be 1-2 mm, for example, the first width may be 1 mm, 1.5 mm, or 2 mm. The plurality of holes 210 of the plate member 200 may each have a second width along the first direction. In some examples, the second width of the holes 210 is greater than or equal to the first width of the opening 170 to ensure that the immersion liquid flowing through the isolation member 16 can flow out of the isolation member 16 and the plate member 200 and enter the space between the battery cell 17 and the bottom plate of the housing 12, thereby improving the circulation efficiency of the immersion liquid. In some examples, the second width can range from 6 to 14 mm; for example, the second width can be 6 mm, 10 mm, or 14 mm.

[0034] In some examples, each of the plurality of orifices 210 may have a first length along a second direction. The size of each orifice 210 is determined by its respective first length and second width. In some examples, the sizes of the plurality of orifices 210 may be configured to be different (different first lengths and / or different second widths) to control the velocity at which the immersion fluid flows out of the isolation member 16 through the orifices 210. In some examples, the length of the orifices 210 may range from 20 to 40 mm, for example, the lengths of the orifices 210 may be 20 mm, 25 mm, 28 mm, 30 mm, 35 mm, and 40 mm. In some examples, as described above, the width of the orifices 210 may range from 6 to 14 mm. In some examples, the size of the plurality of orifices 210 may be determined proportionally based on the distance of each orifice 210 from the first sidewall. For example, since the immersion fluid flow rate is faster closer to the liquid outlet member 13, the size of the orifice 210 may be set inversely proportional to the distance from the first sidewall where the liquid outlet member 13 is located to ensure heat dissipation for the cell away from the liquid outlet member 13. For example, as Figure 4 As shown, the dimensions of the first to fourth columns of holes 210 along the second direction can be set to nominal dimensions (e.g., the length of the hole 210 is 25 mm and the width is 10 mm), the dimensions of the fifth to eighth columns of holes 210 along the second direction can be set to 1.2 times the nominal dimensions, the dimensions of the ninth to tenth columns of holes 210 along the second direction can be set to 1.3 times the nominal dimensions, and the dimensions of the eleventh to thirteenth columns of holes 210 along the second direction can be set to 1.5 times the nominal dimensions. Thus, by configuring the dimensions of the holes 210 formed on the plate member 200, the flow rate of the immersion liquid can be controlled.

[0035] Further reference Figure 5 and Figure 11 In various embodiments of this application, the battery box 1 may further include a support member 121. The support member 121 may be disposed along a first direction and corresponding to the isolation member 16 between the plate member 200 and the bottom plate of the box body 12, such as... Figure 5 and Figure 11 As shown in the diagram. In some examples, the support member 121 may be a Z-beam, which may be made of metal. In some examples, the support member 121 may be welded to the bottom plate of the housing 12 and contact the plate member 200 to provide support for the housing 12. In some examples, the support member 121 may be formed with a groove 122 to facilitate the flow of immersion liquid flowing out of the isolation member 16 and the plate member 200 through the orifice 210 toward the outlet member 13 in a first direction, such as... Figure 11 As shown in the diagram, the support member 121 with the groove 122 forms a channel for the immersion liquid to flow in the first direction in the space between the cell 17 and the bottom of the housing 12, improving the circulation efficiency of the immersion liquid. Furthermore, the support member 121 increases the load-bearing capacity of the housing 12, preventing deformation, while also relaxing the material strength requirements for the isolation member 16, plate member 200, and side walls of the housing 12, thus offering wider material applicability.

[0036] In various embodiments of this application, the battery box 1 may further include a valve component 14. The valve component 14 may be disposed on the top plate of the battery box 1, such as... Figure 1 As shown in the diagram. Valve component 14 can be configured to release gas from the battery compartment 1 in response to the gas pressure inside the battery compartment 1 exceeding a first threshold. For example, the first threshold can be 15 ± 3 kPa. Valve component 14 can take various forms, such as a one-way valve, a diaphragm valve, an electromagnetic pressure relief valve, a composite vent valve, etc. Valve component 14 can be used to balance the gas pressure inside the compartment 12 after the immersion liquid is injected into the compartment 12, so that the immersion liquid can achieve pressure relief by its own weight. Figures 8 to 10 The flow trajectory illustrated in the figure, on the other hand, enables pressure relief to achieve the purpose of explosion prevention in the event of thermal runaway, for example, in the case of a battery cell.

[0037] The above describes an immersion battery box according to various aspects of this application. Those skilled in the art should understand that the descriptions of aspects such as fixing methods (e.g., fixing the top plate to the box body, fixing the plate member to the bottom of the box body), materials used (e.g., the materials of the first and second isolation sub-members, and the plate members), selection of numerical ranges (e.g., the dimensions of the first and second isolation sub-members, the dimensions of the openings, the dimensions of the holes, the sizes of the first and second gaps, the sizes of the first and second widths), and specific implementation methods (e.g., the specific form of the valve member, the specific structure of the inlet and outlet members), etc., in the above embodiments are merely exemplary, and any other suitable alternatives fall within the scope of this application.

[0038] The prior description of this application is provided to enable any person skilled in the art to make or use this application. Various modifications to this application will be apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the spirit or scope of this application. Therefore, this application is not intended to be limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An immersion battery box, characterized in that, The battery box includes: The enclosure includes a top plate, a bottom plate, and side walls; A battery cell module, comprising a plurality of battery cells, the plurality of battery cells being arranged at intervals along a first direction and a second direction orthogonal to the first direction and housed within the housing; A plurality of isolation members are disposed within the interval along the first direction and the second direction, each isolation member having an opening through which immersion liquid flows in a third direction, the third direction being orthogonal to the plane defined by the first direction and the second direction; and A plate component is disposed between the battery cell module and the bottom plate of the housing and contacts the battery cell module and is separated from the bottom plate by a gap. The plate component is formed with a plurality of holes along the second direction corresponding to the openings of the plurality of isolation components, so that immersion liquid flows out of the isolation components through the holes.

2. The battery box as described in claim 1, characterized in that, The isolation component includes: A first isolation sub-component is disposed along the second direction or the first direction and contacts the battery cell, the first isolation sub-component being made of a thermally conductive material; A second isolating sub-component is housed within the first isolating sub-component and wherein the opening is formed, the second isolating sub-component being made of an insulating material.

3. The battery box as described in claim 1, characterized in that, The plate component is made of insulating material.

4. The battery box as described in claim 1, characterized in that, The opening of the isolation member has a first width along the first direction or the second direction, and the plurality of holes of the plate member each have a second width along the first direction, wherein the second width is greater than or equal to the first width.

5. The battery box as described in claim 1, characterized in that, The battery box also includes: A liquid inlet component is disposed on the first sidewall of the housing along the second direction and near the top plate of the housing; and The liquid outlet component is disposed on the first side wall and near the bottom plate of the housing, so that the immersion liquid enters the battery box through the liquid inlet component and reaches the top of the battery cell, flows through the opening and the hole in the third direction through the isolation component and the plate component, and flows out of the battery box through the liquid outlet component.

6. The battery box as described in claim 5, characterized in that, Each of the plurality of holes has a first length along the second direction, and the plurality of holes have different sizes, the sizes being determined proportionally based on the distance of each hole from the first sidewall.

7. The battery box as described in claim 5, characterized in that, The battery box also includes: A supporting member is disposed between the plate member and the bottom plate of the box body along the first direction and corresponding to the isolation member.

8. The battery box as described in claim 7, characterized in that, The supporting member is a Z-shaped beam made of metal, and the Z-shaped beam has grooves to facilitate the flow of the immersion liquid from the isolation member and the plate member through the holes toward the liquid outlet member in the first direction.

9. The battery box as described in claim 5, characterized in that, The battery box also includes: A valve component disposed on the top plate of the battery compartment and configured to discharge gas from the battery compartment in response to the gas pressure inside the battery compartment exceeding a first threshold.

10. The battery box as claimed in claim 1, characterized in that, The battery cell module includes at least two battery cells connected in series.

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