Submerged battery pack shell, battery pack and electric device

Abstract

This application relates to the field of battery pack structure technology, and discloses an immersion battery pack shell, battery pack, and electrical equipment, including a shell body and multiple support members. The shell body has a receiving cavity for accommodating the battery module, and the receiving cavity has a liquid inlet and a liquid outlet. Multiple support members are spaced apart along a first direction on the bottom surface of the receiving cavity. Each support member has a flow channel communicating with the receiving cavity. The flow channels of some support members are connected to the liquid inlet, and the flow channels of other support members are connected to the liquid outlet, so as to solve or improve the problem of low heat dissipation efficiency of the battery pack.

Description

Technical Field

[0001] This application relates to the field of battery pack structure technology, specifically to immersion battery pack casings, battery packs, and electrical equipment. Background Technology

[0002] Battery pack heat dissipation is a core indicator for ensuring its safety and performance. Good heat dissipation can keep the battery pack operating within the optimal temperature range, ensuring stable power output and extending driving range. It is a key guarantee for the reliable operation of new energy equipment. However, excessively high battery pack temperature can cause thermal runaway, leading to safety accidents such as fire and explosion.

[0003] In related technologies, the battery pack is filled with static coolant (such as fluorinated liquid), which cannot flow sufficiently inside the battery pack, resulting in low heat dissipation efficiency. Summary of the Invention

[0004] This application provides an immersion battery pack housing, a battery pack, and an electrical device to solve or improve the problem of low heat dissipation efficiency of battery packs.

[0005] In the first aspect, this application provides an immersion battery pack, including a shell body and multiple supporting members, the specific solution of which is as follows.

[0006] The shell body has a receiving cavity for accommodating the battery module, and the receiving cavity has a liquid inlet and a liquid outlet; Multiple support members are spaced apart along a first direction on the bottom surface of the accommodating cavity. Each support member is provided with a flow channel communicating with the accommodating cavity. The flow channel of a portion of the support members is connected to the liquid inlet, and the flow channel of another portion of the support members is connected to the liquid outlet.

[0007] Beneficial effects: By incorporating inlet and outlet ports on the casing and multiple support members on the inner bottom surface of the accommodating cavity, each support member has flow channels that communicate with the accommodating cavity. Some of the support members' flow channels connect to the outlet ports, allowing coolant to enter the corresponding support member's flow channels from the inlet ports, then flow through the support member's channels into the accommodating cavity, pass through the gaps between the battery modules, enter the flow channels within the support members connected to the outlet ports, and finally exit from the outlet ports. This creates a flow pattern of coolant within the accommodating cavity, improving the heat exchange efficiency for the battery modules within the cavity.

[0008] Furthermore, since the temperature at the bottom of the battery module is relatively high, the low-temperature coolant inside the support component flows out through the liquid flow hole to actively cool the bottom of the battery module first. The cooling method of injecting coolant from the bottom can dissipate heat more directly to the heat source and promote more orderly convection of coolant in the cavity, effectively reducing the temperature difference between the top and bottom and left and right sides of the battery module, avoiding local overheating (hot spots), and improving the consistency and lifespan of the battery module. Meanwhile, the support component has the dual functions of supporting the battery module and distributing the coolant. The integrated flow channel of the support component eliminates the need for additional complex cooling pipes or cold plates between the battery modules, which makes the internal structure of the battery pack more compact and improves the energy density.

[0009] In one alternative embodiment, the flow channel of the support member includes: A fluid flow cavity is disposed within the support member and extends along a second direction intersecting the first direction; Both the connecting port and the liquid flow hole are connected to the liquid flow cavity. The connecting port is connected to the liquid inlet or the liquid outlet, and the liquid flow hole is connected to the accommodating cavity.

[0010] Beneficial effects: By setting inlet and outlet holes on the shell body, and setting multiple support members on the inner bottom surface of the accommodating cavity, the support members are provided with connecting ports and multiple liquid flow holes. The connecting ports on the multiple support members located on one side of the first direction are connected to the inlet holes, and the connecting ports on the multiple support members located on the other side of the first direction are connected to the outlet holes. Thus, the coolant enters the liquid flow chambers in the multiple support members located on one side of the first direction from the inlet holes, and then enters the accommodating cavity from the liquid flow holes on the liquid flow chambers. It then passes through the gaps between the battery modules, flows to the other side of the accommodating cavity along the first direction, enters the liquid flow chamber in the support member connected to the outlet hole, and then exits from the outlet hole. This forms a state in which the coolant flows in the accommodating cavity, which improves the heat exchange efficiency of the battery modules in the accommodating cavity.

[0011] In one optional embodiment, the inlet and outlet are located on the inner bottom of the accommodating cavity; The connecting port extends along the second direction and faces the inner bottom surface of the accommodating cavity. A plurality of liquid inlet holes opposite to the connecting port are arranged at intervals along the second direction, and a plurality of liquid outlet holes opposite to the connecting port are arranged at intervals along the second direction.

[0012] In one optional embodiment, a liquid inlet chamber and a liquid outlet chamber are provided on the shell body near the bottom surface of the accommodating cavity. Along a third direction, the orthographic projection of the liquid inlet hole on the bottom surface of the accommodating cavity coincides with the orthographic projection of the liquid inlet chamber on the bottom surface of the accommodating cavity, and the orthographic projection of the liquid outlet hole on the bottom surface of the accommodating cavity coincides with the orthographic projection of the liquid outlet chamber on the bottom surface of the accommodating cavity. The liquid inlet hole is connected to the liquid inlet chamber, and the liquid outlet hole is connected to the liquid outlet chamber. The third direction, the first direction, and the second direction intersect each other.

[0013] In one optional embodiment, a plurality of first liquid-separating ribs are spaced apart in the liquid inlet chamber along the first direction, and a plurality of second liquid-separating ribs are spaced apart in the liquid outlet chamber along the first direction. The plurality of first liquid-separating ribs are spaced apart from the two inner sidewalls of the liquid inlet chamber along the second direction, and the plurality of second liquid-separating ribs are spaced apart from the two inner sidewalls of the liquid outlet chamber along the second direction.

[0014] In one optional embodiment, along the second direction, the liquid inlet chamber and the liquid outlet chamber are connected at one side, and the liquid inlet chamber and the liquid outlet chamber are respectively provided at the other side.

[0015] In an optional embodiment, the device further includes a plurality of partitions, which are spaced apart in the accommodating cavity along the first direction. The partitions are used to fix the battery module between adjacent partitions. Each partition has a liquid passage cavity, and each liquid passage cavity has a flow hole at both ends along a third direction. The flow hole communicates with the liquid passage cavity, and the third direction, the first direction, and the second direction intersect each other.

[0016] In one optional embodiment, the separator has a first liquid permeation hole on its side wall facing the battery module; And / or, the portion of the support member that contacts the battery module is provided with a second liquid permeation hole; And / or, along the first direction, a plurality of the partitions and a plurality of the supports are arranged alternately; And / or, along the first direction, in one of the plurality of partitions, the outer side of the partition at one end is provided with the drain hole, the outer side of the partition at the other end is provided with the inlet hole, and the inlet hole is provided between two adjacent partitions; And / or, along the third direction, there is a gap between the partition and the inner bottom surface of the accommodating cavity; And / or, along the second direction, the two ends of the partition are respectively connected to the two sidewalls opposite to the accommodating cavity.

[0017] In one alternative embodiment, the housing body further has an electrical cavity that is sealed and isolated from the receiving cavity, the electrical cavity being used to receive electrical components.

[0018] Secondly, this application also provides a battery pack, including multiple battery modules and the immersion battery pack housing mentioned in the first aspect, wherein the multiple battery modules are spaced apart in the accommodating cavity along the first direction, and the battery modules are in contact with the support member.

[0019] Beneficial effects: Since the battery pack includes an immersion battery pack casing, it has the same technical effects as the immersion battery pack casing, which will not be elaborated here.

[0020] Thirdly, this application also provides an electrical device, including the battery pack described in the second aspect.

[0021] Beneficial effects: Since the electrical equipment includes a battery pack, it has the same technical effects as the battery pack, so they will not be elaborated here. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this application, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is an axonometric view of an immersion battery pack housing according to an embodiment of this application; Figure 2 This is a partial axonometric view of an immersion battery pack housing according to an embodiment of this application; Figure 3 A front view of an immersion battery pack casing according to an embodiment of this application, with a portion removed; Figure 4 This is a front view of an immersion battery pack casing according to an embodiment of this application; Figure 5 for Figure 4 Sectional view at point AA; Figure 6 This is an axonometric view of a partition plate in the casing of an immersion battery pack according to an embodiment of this application; Figure 7 This is an axonometric view of a partition in the casing of an immersion battery pack according to an embodiment of this application; Figure 8 This is an axonometric view of a support member in an immersion battery pack housing according to an embodiment of this application; Figure 9 This is an axonometric view of a support member in an immersion battery pack housing according to an embodiment of this application; Figure 10 This is an axonometric view of a battery pack according to an embodiment of this application.

[0024] Explanation of reference numerals in the attached figures: X, first direction; Y, second direction; Z, third direction; 1. Shell body; 2. Supporting components; 3. Separator; 4. Battery module; 11. Receptacle; 12. Liquid inlet; 13. Liquid outlet; 14. Liquid inlet chamber; 141. First liquid-separating rib; 142. Liquid inlet; 15. Liquid outlet chamber; 151. Second liquid-separating rib; 152. Liquid outlet; 16. Electrical cavity; 21. Liquid flow chamber; 22. Connecting port; 23. Liquid flow orifice; 24. Second liquid permeation orifice; 31. Liquid passage chamber; 32. Flow passage orifice; 33. First liquid passage orifice. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two elements. The terms "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, the range of which is within an acceptable deviation range, wherein the acceptable deviation range is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, where an acceptable deviation range for approximate parallelism can be, for example, within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where an acceptable deviation range for approximate perpendicularity can also be, for example, within 5°. "Equal" includes absolute equality and approximate equality, where an acceptable deviation range for approximate equality can be, for example, a difference between the two equal items being less than or equal to 5% of either one. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] Battery pack heat dissipation is a core indicator for ensuring its safety and performance. Good heat dissipation can keep the battery pack operating within the optimal temperature range, ensuring stable power output and extending driving range. It is a key guarantee for the reliable operation of new energy equipment. However, excessively high battery pack temperature can cause thermal runaway, leading to safety accidents such as fire and explosion.

[0028] In related technologies, the battery pack is filled with static coolant (such as fluorinated liquid), which cannot flow sufficiently inside the battery pack, resulting in low heat dissipation efficiency.

[0029] Therefore, this application provides an immersion battery pack housing, a battery pack, and an electrical device to solve or improve the problem of low heat dissipation efficiency of the battery pack.

[0030] The following is combined Figures 1 to 10 This describes an embodiment of the present application.

[0031] According to embodiments of this application, in a first aspect, an immersion battery pack housing is provided, such as... Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, it includes a shell body 1 and multiple support components 2, and the specific scheme is as follows.

[0032] The casing body 1 is typically made of high-strength aluminum alloy, stainless steel, or composite materials (such as carbon fiber reinforced plastic). Aluminum alloy is lightweight, has high specific strength, good thermal conductivity, and is easy to extrude or die-cast, making it the mainstream choice for electric vehicle battery pack housings. Stainless steel has higher strength and corrosion resistance, but is heavier and is often used in applications requiring extremely high strength or in severely corrosive environments. Composite materials have extremely high specific strength and specific modulus, which can significantly reduce weight, and also have good insulation properties; such as Figure 1 As shown, the shell body 1 has a receiving cavity 11 for receiving the battery module 4, and the receiving cavity 11 has a liquid inlet hole 12 and a liquid outlet hole 13.

[0033] Specifically, the shell body 1 includes a lower groove and an upper cover plate. The lower groove has an opening and the interior of the lower groove is rectangular to accommodate the regular arrangement of the battery cells or modules. The upper cover plate seals and covers the opening of the lower groove.

[0034] It is understandable that the position and number of the liquid inlet hole 12 and the liquid outlet hole 13 are not limited and can be selected and set according to the needs of use.

[0035] like Figures 7 to 8As shown, the support component 2 can be a thermally conductive engineering plastic component, such as thermally conductive nylon (PA), thermally conductive polycarbonate (PC), thermally conductive polypropylene (PP), etc. It can also be made of aluminum alloy to ensure strength and thermal conductivity. However, the surface of the support component 2 that contacts the battery module 4 is anodized, coated with a ceramic coating, or covered with an insulating film (such as polyimide film) to achieve insulation.

[0036] like Figures 1 to 3 As shown, multiple support members 2 are spaced apart along the first direction X on the inner bottom surface of the accommodating cavity 11 to support one or more battery modules 4, serving the dual functions of physical support and thermal management. Specifically, the support members 2 can be connected to the inner bottom surface of the accommodating cavity 11 by welding or bonding. Of course, the support members 2 can also be integrated with the inner bottom surface of the accommodating cavity 11.

[0037] Furthermore, each of the support members 2 is provided with a flow channel communicating with the accommodating cavity 11. A portion of the flow channel of the support member 2 is connected to the liquid inlet hole 12, and another portion of the flow channel of the support member 2 is connected to the liquid outlet hole 13.

[0038] In this embodiment, such as Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, a liquid inlet hole 12 and a liquid outlet hole 13 are provided on the shell body 1. Multiple support members 2 are provided on the inner bottom surface of the accommodating cavity 11. The support members 2 are provided with flow channels, which are connected to the accommodating cavity 11. A portion of the flow channels of the support members 2 are connected to the liquid outlet hole 13, so that the coolant enters the flow channel of the corresponding support member 2 from the liquid inlet hole 12, then enters the accommodating cavity 11 through the flow channel of the support member 2, then passes through the gap between the battery modules 4, enters the flow channel in the support member 2 connected to the liquid outlet hole 13, and then exits from the liquid outlet hole 13. This forms a state in which the coolant flows in the accommodating cavity 11, which improves the heat exchange efficiency of the battery modules 4 in the accommodating cavity 11.

[0039] Furthermore, since the temperature at the bottom of the battery module 4 is relatively high, the low-temperature coolant in the support 2 flows out through the liquid flow hole 23 to actively cool the bottom of the battery module 4 first. The cooling method of injecting coolant from the bottom can dissipate heat more directly to the heat source and promote more orderly convection of coolant in the accommodating cavity 11, effectively reducing the temperature difference between the top and bottom and left and right sides of the battery module 4, avoiding local overheating (hot spots), and improving the consistency and lifespan of the battery module 4.

[0040] Meanwhile, the support component 2 has the dual functions of supporting the battery module 4 and distributing the coolant. The support component 2 integrates flow channels, eliminating the need for additional complex cooling pipes or cold plates between the battery modules 4. This makes the internal structure of the battery pack more compact and improves the energy density.

[0041] In one embodiment, the flow channel of the support 2 includes a liquid flow cavity 21, a connecting port 22, and a liquid flow hole 23.

[0042] The fluid flow cavity 21 is located within the support member 2 and extends along the second direction Y, which intersects with the first direction X. For example, the second direction Y is perpendicular to the first direction X. The fluid flow cavity 21 is the main channel for the flow of coolant inside the support member 2.

[0043] like Figures 7 to 8 As shown, both the connecting port 22 and the liquid flow hole 23 are connected to the liquid flow cavity 21. The connecting port 22 is connected to the liquid inlet hole 12 or the liquid outlet hole 13, and the liquid flow hole 23 is connected to the receiving cavity 11. For example, the support member 2 has multiple liquid flow holes 23, all of which are connected to the receiving cavity 11. Specifically, the liquid flow holes 23 are formed on the side wall of the support member 2, and the coolant is sprayed or seeped from the liquid flow cavity 21 into the receiving cavity 11 through the liquid flow holes 23.

[0044] Specifically, the shape, size and number of the connecting ports 22 are not specifically limited, and the cross-section of the liquid flow cavity 21 along the second direction Y can be of any shape, as long as it can satisfy the flow and distribution of coolant along the second direction Y.

[0045] Furthermore, such as Figure 2 As shown, the connecting port 22 on the multiple support members 2 located at one end of the first direction X is connected to the liquid inlet 12, and the connecting port 22 on the multiple support members 2 located at the other end of the first direction X is connected to the liquid outlet 13, so that the coolant can form a flow trend from one end of the first direction X to the other end of the first direction X in the accommodating cavity 11.

[0046] In this embodiment, such as Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8As shown, a liquid inlet hole 12 and a liquid outlet hole 13 are provided on the shell body 1. Multiple support members 2 are provided on the inner bottom surface of the accommodating cavity 11. The support members 2 are provided with a connecting port 22 and multiple liquid flow holes 23. The connecting port 22 on the multiple support members 2 located at one end of the first direction X is connected to the liquid inlet hole 12, and the connecting port 22 on the multiple support members 2 located at the other end of the first direction X is connected to the liquid outlet hole 13. Thus, the coolant enters the liquid flow cavity 21 in the multiple support members 2 located at one end of the first direction X from the liquid inlet hole 12, and then enters the accommodating cavity 11 from the liquid flow hole 23 on the liquid flow cavity 21. It then passes through the gap between the battery modules 4 and flows to the other end of the accommodating cavity 11 along the first direction X, enters the liquid flow cavity 21 in the support member 2 connected to the liquid outlet hole 13, and then exits from the liquid outlet hole 13. This forms a state in which the coolant flows in the accommodating cavity 11, which improves the heat exchange efficiency of the battery modules 4 in the accommodating cavity 11.

[0047] In one embodiment, such as Figure 2 As shown, the inlet hole 12 and the outlet hole 13 are located on the inner bottom of the accommodating cavity 11, that is, the inlet and outlet of the coolant are located on the bottom of the battery pack casing.

[0048] like Figure 2 As shown, the connecting port 22 extends along the second direction Y and faces the inner bottom surface of the accommodating cavity 11. That is, the connecting port 22 is a narrow opening extending along the second direction Y. Specifically, the part of the liquid flow cavity 21 facing the inner bottom surface of the accommodating cavity is set as an opening. That is, the support member 2 is an opening groove as a whole, with the opening facing the inner bottom surface of the accommodating cavity.

[0049] Multiple liquid inlet holes 12, which are opposite to the communication port 22, are arranged at intervals along the second direction Y. It can be understood that the communication port 22 on the support member 2, which is connected to the liquid inlet hole 12, is connected to the multiple liquid inlet holes 12.

[0050] Multiple drainage holes 13, which are arranged opposite to the communication port 22, are spaced apart along the second direction Y. It can be understood that the communication port 22 on the support member 2, which is connected to the drainage holes 13, is connected to the multiple drainage holes 13.

[0051] In this embodiment, such as Figure 2 As shown, the connecting port 22 extends along the second direction Y, and the connecting port 22 faces the inner bottom surface of the accommodating cavity 11. A plurality of liquid inlet holes 12 are arranged at intervals along the second direction Y, and a plurality of liquid outlet holes 13 are arranged at intervals along the second direction Y, which can ensure that when the coolant enters the liquid flow cavity 21 of the support member 2, it can be evenly distributed into each part of the liquid flow cavity 21 along the second direction Y.

[0052] Similarly, the coolant flowing out of the liquid flow cavity 21 can also be collected evenly, avoiding the flow dead zone caused by single-point entry / exit of coolant in the liquid flow cavity 21, ensuring the uniformity of coolant flow distribution in each support 2, improving the uniformity of coolant flow, and thus improving the uniformity of cooling of battery module 4.

[0053] In one embodiment, such as Figure 2 and Figure 3 As shown, a liquid inlet chamber 14 and a liquid outlet chamber 15 are provided on the inner bottom surface of the shell body 1 near the accommodating cavity 11. Specifically, the size of the liquid outlet chamber 15 can be set according to specific needs, such as... Figure 4 and Figure 5 As shown, along the third direction Z, the orthographic projection of the inlet hole 12 on the inner bottom surface of the accommodating cavity 11 coincides with the orthographic projection of the inlet cavity 14 on the inner bottom surface of the accommodating cavity 11, and the orthographic projection of the drain hole 13 on the inner bottom surface of the accommodating cavity 11 coincides with the orthographic projection of the drain cavity 15 on the inner bottom surface of the accommodating cavity 11. The third direction Z, the first direction X, and the second direction Y intersect each other, for example, perpendicularly.

[0054] It is understandable that the inlet chamber 14 and the outlet chamber 15 are arranged along the first direction X, and are both located directly below the accommodating chamber 11 along the third direction Z.

[0055] Specifically, both the inlet chamber 14 and the outlet chamber 15 are flat cavities.

[0056] In this embodiment, such as Figures 2 to 5 As shown, a liquid inlet chamber 14 and a liquid outlet chamber 15 are provided on the inner bottom surface of the shell body 1 near the accommodating cavity 11. Along the third direction Z, the orthographic projection of the liquid inlet hole 12 on the inner bottom surface of the accommodating cavity 11 coincides with the orthographic projection of the liquid inlet chamber 14 on the inner bottom surface of the accommodating cavity 11, and the orthographic projection of the liquid outlet hole 13 on the inner bottom surface of the accommodating cavity 11 coincides with the orthographic projection of the liquid outlet chamber 15 on the inner bottom surface of the accommodating cavity 11. That is, a liquid cooling channel is integrated at the bottom of the shell body 1, and at the same time, circulating coolant can be transported to the support member 2 in the accommodating cavity 11.

[0057] Furthermore, the inlet chamber 14 and the outlet chamber 15 each serve as buffer chambers with a large cross-section, which can reduce the flow rate of the coolant and equalize the pressure before it enters each support 2. This helps to further ensure that the coolant flow rate distributed to each support 2 is more uniform and consistent, and reduces the flow deviation caused by slight differences in branch flow resistance.

[0058] In one embodiment, such as Figure 2 and Figure 5As shown, a plurality of first liquid-separating ribs 141 are spaced apart along the first direction X in the liquid inlet chamber 14, and a plurality of second liquid-separating ribs 151 are spaced apart along the first direction X in the liquid outlet chamber 15. The plurality of first liquid-separating ribs 141 are spaced apart from the two inner sidewalls of the liquid inlet chamber 14 along the second direction Y, and the plurality of second liquid-separating ribs 151 are spaced apart from the two inner sidewalls of the liquid outlet chamber 15 along the second direction Y. Specifically, the first liquid-separating ribs 141 and the second liquid-separating ribs 151 both extend along the second direction Y, thereby dividing the liquid inlet chamber 14 and the liquid outlet chamber 15 into multiple spaces.

[0059] In this embodiment, such as Figure 2 and Figure 5 As shown, the arrangement of the first liquid-blocking rib 141 and the second liquid-blocking rib 151 can prevent or reduce the coolant from preferentially flowing to the nearest liquid inlet hole 12 after entering the liquid inlet chamber 14, resulting in a large flow rate for the support member 2 closer to the inlet and a small flow rate for the support member further away. This balances the pressure in the liquid inlet chamber 14 and the liquid outlet chamber 15, weakens the flow advantage near the inlet, and forces the flow rate to be distributed more evenly to each liquid outlet, thus achieving a more precise flow distribution.

[0060] In one embodiment, such as Figure 5 As shown, along the second direction Y, the liquid inlet chamber 14 and the liquid outlet chamber 15 are connected on one side by a connecting channel, and the liquid inlet chamber 14 and the liquid outlet chamber 15 are respectively provided with a liquid inlet 142 and a liquid outlet 152 on the other side. The liquid inlet 142 and the liquid outlet 152 are used to connect with an external coolant cooling system.

[0061] Specifically, a connecting channel is provided on the wall panel between the liquid inlet chamber 14 and the liquid outlet chamber 15 on the side away from the liquid inlet 142 along the second direction Y.

[0062] In specific usage, such as Figure 5 As shown, a portion of the coolant entering the inlet chamber 14 through the inlet port 142 enters the accommodating cavity 11 through the inlet hole 12 to cool the battery module 4, and then enters the drain chamber 15 through the drain hole 13 and flows out through the drain port 152; another portion of the coolant entering the inlet chamber 14 through the inlet port 142 directly enters the drain chamber 15 under the guidance of the first liquid-separating rib 141, and then is discharged through the drain port 152.

[0063] In this embodiment, such as Figure 5 As shown, the liquid inlet chamber 14 and the liquid outlet chamber 15 are connected on one side along the second direction Y, and the liquid inlet chamber 14 and the liquid outlet chamber 15 are respectively provided with liquid inlet 142 and liquid outlet 152 on the other side. This allows the coolant entering the liquid inlet chamber 14 to be divided into two parts. One part enters the receiving chamber 11 for circulation and cooling before entering the liquid outlet chamber 15, and the other part directly enters the liquid outlet chamber 15, thereby enhancing the cooling effect on the bottom of the battery module 4.

[0064] In one embodiment, such as Figures 1 to 3 As shown, the submersible battery pack casing also includes multiple separators 3, which are spaced apart in the accommodating cavity along the first direction X. The adjacent separators 3 are used to fix the battery module 4. The separators 3 are preferably engineering plastic plates, but can also be aluminum alloy plates, or can adopt a composite structure, such as a metal core + insulation coating.

[0065] like Figure 6 and Figure 7 As shown, the partition 3 has a liquid passage cavity 31. Both ends of the liquid passage cavity 31 along the third direction Z are provided with flow holes 32. The flow holes 32 are connected to the liquid passage cavity 31. The third direction Z, the first direction X, and the second direction Y intersect each other, for example, perpendicularly.

[0066] Specifically, the two ends of the partition 3 along the second direction Y are connected to the side wall of the accommodating cavity by snap-fit ​​or welding.

[0067] In specific usage, such as Figure 2 As shown, the coolant flowing out of the support member 2 enters the liquid passage chamber 31 through the flow passage hole 32 of a partition 3, and then flows out from the flow passage hole 32 into the top area of ​​the battery module 4, then flows to the other side of the first direction X, and then flows back to the drain hole 13 through another partition 3.

[0068] In this embodiment, such as Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, multiple partitions 3 are spaced apart along the first direction X inside the accommodating cavity 11. The adjacent partitions 3 are used to fix the battery module 4. Both ends of the partitions 3 along the third direction Z are provided with flow holes 32, which can facilitate the flow of coolant on the first direction X side along the third direction Z towards the top area of ​​the accommodating cavity 11, and the flow of coolant on the top of the accommodating cavity 11 on the other side of the first direction X towards the bottom of the accommodating cavity 11, thereby improving heat dissipation efficiency.

[0069] Meanwhile, the adjacent partitions 3 are used to fix the battery module 4, which can achieve fixed positioning of the battery module 4.

[0070] In one embodiment, such as Figure 6 and Figure 7 As shown, a first liquid permeation hole 33 is provided on the side wall of the separator 3 facing the battery module 4; specifically, the first liquid permeation hole 33 can be any shape such as oblong, elliptical, or rectangular. Figure 8 and Figure 9As shown, a second liquid permeation hole 24 is provided at the part of the support member 2 that contacts the battery module 4. That is, the second liquid permeation hole 24 is located on the top of the support member 2. Specifically, the second liquid permeation hole 24 is an oblong hole, or it can be any shape such as ellipse or rectangle.

[0071] In this embodiment, such as Figure 8 and Figure 9 As shown, the second liquid permeation hole 24 is provided to facilitate contact between the coolant in the liquid flow cavity 21 inside the support member 2 and the bottom surface of the battery module 4, thereby providing contact cooling to the bottom of the battery module 4; as Figure 6 and Figure 7 As shown, the first liquid permeation hole 33 is provided so that the coolant in the liquid cavity 31 of the partition 3 can come into contact with the side of the battery module 4 to cool the side of the battery module 4.

[0072] In one embodiment, reference Figure 2 and Figure 3 As shown, along the first direction X, among the multiple partitions 3, one end of the partition 3 has a drain hole 13 on its outer side, and the other end of the partition 3 has an inlet hole 12 on its outer side, and an inlet hole 12 is provided between two adjacent partitions 3.

[0073] In this embodiment, the inlet hole 12 is located on the outermost side of one end of the battery pack and in the area between every two adjacent partitions 3. This means that the coolant is not only injected from the overall inlet end, but can also enter the accommodating cavity 11 at multiple local locations along the first direction X. This multi-point inlet structure shortens the flow path of the coolant to each battery module 4, avoids the problem of insufficient flow at the far end, improves the uniformity of coolant distribution along the first direction X, and thus reduces the temperature difference between different battery modules 4.

[0074] Furthermore, the drain holes 13 are concentrated on the outermost side of the baffle 3 at the other end, forming a clear flow direction, i.e., unidirectional flow from the inlet end to the outlet end. This directional flow trend facilitates the timely discharge of hot liquid, prevents hot liquid stagnation or backflow, and further enhances the heat dissipation effect. At the same time, the concentrated unilateral drain also simplifies the connection of external pipelines and facilitates integration with the vehicle cooling system.

[0075] In one embodiment, reference Figure 2 and Figure 3 As shown, along the first direction X, multiple partitions 3 and multiple support members 2 are arranged alternately.

[0076] In this embodiment, the coolant flowing out of the support member 2 can directly enter the gap between the battery modules 4 between adjacent partitions 3. With the help of the liquid passage chamber 31 and the flow passage hole 32 of the partition 3, the coolant is guided to flow quickly through the side and top areas of the battery module 4, avoiding the accumulation of coolant at the bottom of the module and improving the heat exchange efficiency.

[0077] Meanwhile, the alternating arrangement of the structure can form an orderly support and flow guiding grid within the accommodating cavity 11. The partition plate 3 and the support member 2 are used to limit and fix the battery module 4 from the side and bottom respectively, thereby enhancing the installation stability of the battery module 4 within the accommodating cavity 11 and reducing vibration displacement under operating conditions such as vehicle driving.

[0078] In one embodiment, reference Figure 2 and Figure 3 As shown, along the third direction Z, there is a gap between the partition 3 and the inner bottom surface of the accommodating cavity 11.

[0079] In this embodiment, along the third direction Z, there is a gap between the partition 3 and the inner bottom surface of the accommodating cavity 11, providing space for fluid to enter or exit through the flow hole 32 at the bottom of the partition 3, so that it can communicate with the bottom area of ​​the accommodating cavity 11.

[0080] In one embodiment, reference Figure 2 and Figure 6 As shown, along the second direction Y, the two ends of the partition 3 are respectively connected to the two opposite sidewalls of the accommodating cavity 11. For example, the partition 3 is welded, screwed, bonded or riveted to the sidewalls of the accommodating cavity 11.

[0081] In this embodiment, the partition 3 spans the entire accommodating cavity 11 along the second direction Y and is firmly connected to the side walls, making it a lateral rigid reinforcing member within the shell body 1. This enhances the torsional and bending stiffness of the entire battery pack shell and strengthens its overall mechanical stability. Simultaneously, this connection method divides the accommodating cavity 11 along the first direction X into multiple independent module placement areas. Combined with the liquid passage 31 and flow holes 32 of the partition 3, the coolant flow path within each area is relatively independent and controllable, preventing interference between coolants in different areas and ensuring consistent heat dissipation for each battery module 4.

[0082] In one embodiment, such as Figures 1 to 3 As shown, the housing body 1 also has an electrical cavity 16, which is sealed and isolated from the accommodating cavity 11. The electrical cavity 16 is used to accommodate electrical components. Specifically, the electrical cavity 16 is used to install electrical components such as battery management system (BMS), high voltage connector, fuse, relay, and current sensor. These components are usually not resistant to immersion in coolant or require a dry environment to ensure electrical insulation and signal reliability.

[0083] In this embodiment, such as Figure 10 As shown, the electrical cavity 16 is designed to allow electrical components to be centrally housed within the completely dry and sealed electrical cavity 16, physically isolated from the coolant-filled accommodating cavity 11. This fundamentally avoids the damage caused by coolant leakage to high-voltage electrical appliances and precision electronic components, ensuring the reliability and stability of critical components such as the BMS.

[0084] According to embodiments of this application, a second aspect also provides a battery pack, such as... Figure 10 As shown, it includes multiple sets of battery modules 4 and an immersion battery pack shell in any embodiment of the first aspect. The multiple sets of battery modules 4 are spaced apart in the accommodating cavity 11 along the first direction X, and the battery modules 4 are in contact with the support member 2.

[0085] Specifically, battery module 4 includes multiple battery cells arranged side by side along the second direction Y.

[0086] In this embodiment, since the battery pack includes an immersion battery pack housing, which has the same technical effects as the immersion battery pack housing, it will not be described in detail here.

[0087] According to an embodiment of this application, a third aspect also provides an electrical device including the battery pack described in the second aspect.

[0088] Specifically, the electrical equipment can be electric bicycles, vehicles, ships, spacecraft, and electric toys, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. The embodiments of this application do not impose special limitations on the above-mentioned electrical equipment.

[0089] In this embodiment, since the electrical device includes a battery pack and has the same technical effects as the battery pack, it will not be described in detail here.

[0090] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A submersible battery pack casing, characterized in that, include: The shell body (1) has a receiving cavity (11) for receiving the battery module (4), and the receiving cavity (11) has a liquid inlet (12) and a liquid outlet (13). Multiple support members (2) are spaced apart along the first direction (X) on the bottom surface of the accommodating cavity (11). Each support member (2) is provided with a flow channel communicating with the accommodating cavity (11). A portion of the flow channel of the support member (2) is connected to the liquid inlet hole (12), and another portion of the flow channel of the support member (2) is connected to the liquid outlet hole (13).

2. The immersion battery pack casing according to claim 1, characterized in that, The flow channel of the support member (2) includes: A fluid flow cavity (21) is disposed within the support member (2) and extends along a second direction (Y) intersecting the first direction (X); The connecting port (22) and the liquid flow hole (23) are both connected to the liquid flow cavity (21). The connecting port (22) is connected to the liquid inlet hole (12) or the liquid outlet hole (13). The liquid flow hole (23) is connected to the accommodating cavity (11).

3. The immersion battery pack housing according to claim 2, characterized in that, The inlet hole (12) and the outlet hole (13) are located on the inner bottom of the accommodating cavity (11); The connecting port (22) extends along the second direction (Y) and faces the inner bottom surface of the accommodating cavity (11). A plurality of liquid inlet holes (12) opposite to the connecting port (22) are arranged at intervals along the second direction (Y), and a plurality of liquid outlet holes (13) opposite to the connecting port (22) are arranged at intervals along the second direction (Y).

4. The immersion battery pack housing according to claim 2, characterized in that, The shell body (1) is provided with an inlet chamber (14) and a drain chamber (15) near the bottom surface of the accommodating cavity (11). Along the third direction (Z), the orthographic projection of the inlet hole (12) on the bottom surface of the accommodating cavity (11) coincides with the orthographic projection of the inlet chamber (14) on the bottom surface of the accommodating cavity (11). The orthographic projection of the drain hole (13) on the bottom surface of the accommodating cavity (11) coincides with the orthographic projection of the drain chamber (15) on the bottom surface of the accommodating cavity (11). The inlet hole (12) is connected to the inlet chamber (14), and the drain hole (13) is connected to the drain chamber (15). The third direction (Z), the first direction (X), and the second direction (Y) intersect each other.

5. The immersion battery pack housing according to claim 4, characterized in that, The inlet chamber (14) is provided with a plurality of first liquid-separating ribs (141) spaced apart along the first direction (X), and the outlet chamber (15) is provided with a plurality of second liquid-separating ribs (151) spaced apart along the first direction (X). The plurality of first liquid-separating ribs (141) are spaced apart from the two inner sidewalls of the inlet chamber (14) along the second direction (Y), and the plurality of second liquid-separating ribs (151) are spaced apart from the two inner sidewalls of the outlet chamber (15) along the second direction (Y).

6. The immersion battery pack housing according to claim 5, characterized in that, Along the second direction (Y), the liquid inlet chamber (14) and the liquid outlet chamber (15) are connected at one side, and the liquid inlet chamber (14) and the liquid outlet chamber (15) are respectively provided with a liquid inlet (142) and a liquid outlet (152) at the other side.

7. The immersion battery pack casing according to any one of claims 1 to 6, characterized in that, It also includes multiple partitions (3), which are spaced apart in the accommodating cavity along the first direction (X) and extend along the second direction (Y). The adjacent partitions (3) are used to fix the battery module (4). Each partition (3) has a liquid passage cavity (31). Both ends of the liquid passage cavity (31) along the third direction (Z) are provided with flow holes (32). The flow holes (32) are connected to the liquid passage cavity (31). The third direction (Z), the first direction (X) and the second direction (Y) intersect each other.

8. The immersion battery pack housing according to claim 7, characterized in that, The partition (3) has a first liquid permeation hole (33) on the side wall facing the battery module (4). And / or, the support member (2) is provided with a second liquid permeation hole (24) at the part that contacts the battery module (4). And / or, along the first direction (X), a plurality of the partitions (3) and a plurality of the supports (2) are arranged alternately; And / or, along the first direction (X), in the plurality of partitions (3), the outer side of one end of the partition (3) is provided with the drain hole (13), the outer side of the other end of the partition (3) is provided with the inlet hole (12), and the inlet hole (12) is provided between two adjacent partitions (3). And / or, along the third direction (Z), there is a gap between the partition (3) and the inner bottom surface of the accommodating cavity (11); And / or, along the second direction (Y), the two ends of the partition (3) are respectively connected to the two side walls opposite to the accommodating cavity (11).

9. The immersion battery pack casing according to any one of claims 1 to 6, characterized in that, The shell body (1) also has an electrical cavity (16), which is sealed and isolated from the accommodating cavity (11), and the electrical cavity (16) is used to accommodate electrical components.

10. A battery pack, characterized in that, include: Multiple battery modules (4); The immersion battery pack housing as described in any one of claims 1 to 9, wherein multiple battery modules (4) are spaced apart in the accommodating cavity (11) along the first direction (X), and the battery modules (4) are in contact with the support member (2).

11. An electrical appliance, characterized in that, include: The battery pack as described in claim 10.

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