Immersed liquid-cooled storage battery pack

Abstract

The utility model relates to the technical field of energy storage, in particular to an immersed liquid cooling energy storage battery pack. The immersed liquid cooling energy storage battery pack comprises a surrounding frame structure, a first liquid cooling plate and a second liquid cooling plate, the surrounding frame structure is provided with a containing space used for containing a battery, openings are formed in the two ends, in the first direction, of the containing space, and the first liquid cooling plate and the second liquid cooling plate block the openings correspondingly; the first liquid cooling plate is provided with a first liquid cooling flow channel, a first liquid inlet and a first liquid outlet, the first liquid inlet and the first liquid outlet are communicated with the first liquid cooling flow channel, the first liquid outlet is communicated with the containing space, the second liquid cooling plate is provided with a second liquid cooling flow channel, a second liquid inlet and a second liquid outlet, the second liquid inlet and the second liquid outlet are communicated with the second liquid cooling flow channel, and the second liquid inlet is communicated with the containing space. The immersed liquid cooling storage battery pack is provided with a circulating immersion flow channel for circulating flow of immersion liquid, and the circulating immersion flow channel comprises a first liquid inlet, a first liquid cooling flow channel, a first liquid outlet, an accommodating space, a second liquid inlet, a second liquid cooling flow channel and a second liquid outlet which are communicated with one another.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to an immersion liquid-cooled storage battery pack. Background Technology

[0002] With the continuous development of science and technology, people's demands for batteries are gradually moving towards longer lifespan, higher energy density, and higher energy conversion efficiency. A single battery cannot meet these demands. Therefore, battery packs, which connect multiple batteries in parallel or series, have emerged. During the use of battery packs, the internal components are prone to overheating, and in severe cases, thermal runaway or thermal propagation accidents may occur.

[0003] In existing technologies, heat dissipation is achieved by placing a liquid cooling plate inside the battery pack and attaching the battery to the plate, utilizing heat transfer. However, this heat dissipation method has low efficiency, especially under high-rate battery charging and discharging conditions, where it fails to effectively dissipate heat from the battery.

[0004] Therefore, there is an urgent need to invent an immersion liquid-cooled storage battery pack to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an immersion liquid-cooled storage battery pack to achieve immersion liquid cooling of the battery, thereby improving the safety of battery use and storage.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The immersion liquid-cooled battery pack includes:

[0008] A frame structure having a receiving space for accommodating a battery, the receiving space having openings at both ends along a first direction; and

[0009] A first liquid cooling plate and a second liquid cooling plate, the first liquid cooling plate and the second liquid cooling plate respectively sealing the opening;

[0010] The first liquid cooling plate has a first liquid cooling channel and a first liquid inlet and a first liquid outlet communicating with the first liquid cooling channel, and the first liquid outlet communicating with the receiving space;

[0011] The second liquid cooling plate has a second liquid cooling channel and a second liquid inlet and a second liquid outlet that are connected to the second liquid cooling channel. The second liquid inlet is connected to the accommodating space.

[0012] The immersion liquid-cooled storage battery pack is provided with a circulating immersion channel, which includes a first liquid inlet, a first liquid-cooling channel, a first liquid outlet, a receiving space, a second liquid inlet, a second liquid-cooling channel, and a second liquid outlet that are in phase-connected. The circulating immersion channel is used for the circulation of immersion liquid.

[0013] As an optional feature, the submersible liquid-cooled storage battery pack further includes:

[0014] A support structure is located in the accommodating space, and at least one end of the battery near the second liquid cooling plate is provided with the support structure, which is used to install and position the battery.

[0015] As an optional solution, the support structure is provided with positioning holes and flow guiding holes. The positioning holes and flow guiding holes do not interfere with each other. The positioning holes are used to position and fix the battery, and the flow guiding holes provide guidance for the flow of the immersion liquid.

[0016] As an optional solution, the second liquid cooling plate is provided with a pressure relief through hole, which does not interfere with the second liquid cooling flow channel. The pressure relief through hole is sealed and connected to the positioning hole in the support structure near the second liquid cooling plate. The pressure relief valve of the battery is sealed and connected to the positioning hole in the support structure near the second liquid cooling plate.

[0017] As an optional solution, the first liquid cooling plate includes:

[0018] Two first plates are fastened together. A first groove is provided on the first plate away from the battery along the first direction. The first groove is located on the fastening end face of the first plate. When the two first plates are fastened together, the first groove forms the first liquid cooling channel.

[0019] The first liquid outlet is provided on the first plate that is closer to the battery along the first direction among the two first plates.

[0020] As an optional feature, the width of the first groove is not less than 5mm, and the depth of the first groove along the first direction is not less than 5mm.

[0021] As an optional solution, the frame structure is provided with extension bosses at both ends along the first direction. The extension bosses extend along the end face of the opening. Either of the two extension bosses is sealed and fixed to the first liquid cooling plate, and the other is sealed and fixed to the second liquid cooling plate.

[0022] As an optional solution, the extension boss includes a first extension located inside the opening and a second extension located outside the opening;

[0023] The first extension is locked and fixed to the first liquid cooling plate or the second liquid cooling plate. The immersion liquid-cooled storage battery pack also includes a sealant, which is used to seal the gap between the second extension and the first liquid cooling plate or the second liquid cooling plate.

[0024] As an optional solution, the immersion liquid-cooled storage battery pack further includes a fixing member, wherein the first liquid-cooled plate is provided with a first fixing hole, the second liquid-cooled plate is provided with a second fixing hole, and the first extension is provided with a third fixing hole. The fixing member is configured to be locked and fixed to the first fixing hole and the third fixing hole in sequence or to the second fixing hole and the third fixing hole in sequence.

[0025] And / or, the second extension is provided with a second groove on the end face away from the battery along the first direction, the second groove forming a closed ring in the end face along the shape of the second extension, and the sealant is filled between the second groove and the first liquid cooling plate or the second liquid cooling plate.

[0026] As an optional solution, the frame structure is circumferentially spaced with reinforcing ribs around the first direction, and the reinforcing ribs extend along the first direction.

[0027] The beneficial effects of this utility model are:

[0028] The immersion liquid-cooled energy storage battery pack provided by this utility model has a housing space set within a frame structure, in which the battery is housed. Openings are provided at both ends of the housing space along a first direction, and a first liquid-cooling plate and a second liquid-cooling plate are respectively sealed at the openings, achieving sealed housing of the battery. A first liquid-cooling channel and a first inlet and a first outlet communicating with the first liquid-cooling channel are provided within the first liquid-cooling plate, and a second liquid-cooling channel and a second inlet and a second outlet communicating with the second liquid-cooling plate are provided within the second liquid-cooling plate. The first outlet and the second inlet are connected to the housing space, enabling the immersion liquid-cooled energy storage battery pack to provide immersion circulation. The circulating immersion channel enables cyclic immersion liquid cooling of the battery. The circulating immersion channel includes a first liquid inlet, a first liquid cooling channel, a first liquid outlet, a receiving space, a second liquid inlet, a second liquid cooling channel, and a second liquid outlet. Under the drive of the cyclic cooling drive device, the immersion liquid enters the circulating immersion channel through the first liquid inlet and flows back to the cyclic cooling drive device through the second liquid outlet. This allows the first and second liquid cooling plates to contact and dissipate heat from the battery in the receiving space, while the immersion liquid provides immersion liquid cooling for the battery in the receiving space. This effectively improves the heat dissipation effect of the battery, meets actual heat dissipation requirements, and enhances the safety of battery use and storage. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the immersion liquid-cooled energy storage battery pack provided in this embodiment of the utility model;

[0030] Figure 2 This is an exploded schematic diagram of the immersion liquid-cooled energy storage battery pack provided in this embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the first liquid cooling plate provided in this embodiment of the present invention;

[0032] Figure 4 This is a cross-sectional schematic diagram of the first liquid cooling plate provided in an embodiment of the present utility model;

[0033] Figure 5 This is a schematic diagram of the structure of the second liquid cooling plate provided in this embodiment of the present invention;

[0034] Figure 6 This is a cross-sectional schematic diagram of the second liquid cooling plate provided in an embodiment of the present utility model;

[0035] Figure 7 This is a top view of the support structure provided in an embodiment of the present utility model;

[0036] Figure 8 yes Figure 7 A magnified view of a section at point A in the middle;

[0037] Figure 9 This is a schematic diagram of the frame structure provided in this embodiment of the utility model;

[0038] Figure 10 yes Figure 9 A magnified view of a section at point B.

[0039] In the picture:

[0040] 100. First liquid cooling plate; 110. First plate body; 111. First groove; 120. First liquid cooling channel; 130. First liquid inlet; 140. First liquid outlet; 150. First fixing hole;

[0041] 200, Second liquid cooling plate; 210, Second plate body; 220, Second liquid cooling channel; 230, Second liquid inlet; 240, Second liquid outlet; 250, Second fixing hole; 260, Pressure relief through hole;

[0042] 300. Enclosure structure; 310. Extension boss; 311. First extension; 3111. Third fixing hole; 312. Second extension; 3121. Second groove; 320. Reinforcing rib; 330. Accommodating space;

[0043] 400. Support structure; 410. Positioning hole; 420. Flow guide hole;

[0044] 500. Fasteners;

[0045] 2000, battery. Detailed Implementation

[0046] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0047] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0050] During battery pack operation, the internal components are prone to overheating, which can lead to thermal runaway or thermal propagation accidents in severe cases. Existing technologies utilize heat transfer to dissipate heat from the batteries by incorporating a liquid cooling plate within the battery pack and attaching the battery to the plate. However, this heat dissipation method has low efficiency, especially under high-rate charging and discharging conditions, where it fails to effectively cool the batteries.

[0051] To solve the above problems, such as Figures 1-6 As shown, this embodiment provides an immersion liquid-cooled battery storage pack. The immersion liquid-cooled battery storage pack includes a frame structure 300, a first liquid-cooling plate 100, and a second liquid-cooling plate 200. The frame structure 300 has a receiving space 330 for accommodating a battery 2000. The receiving space 330 has openings at both ends along a first direction. The first liquid-cooling plate 100 and the second liquid-cooling plate 200 respectively seal the openings. The first liquid-cooling plate 100 has a first liquid-cooling channel 120 and a first liquid inlet 130 and a first liquid outlet 140 communicating with the first liquid-cooling channel 120. The first liquid outlet 140 communicates with the receiving space 330. The second liquid cooling plate 200 has a second liquid cooling channel 220 and a second liquid inlet 230 and a second liquid outlet 240 that are connected to the second liquid cooling channel 220. The second liquid inlet 230 is connected to the accommodating space 330. The immersion liquid-cooled storage battery pack is provided with a circulating immersion channel. The circulating immersion channel includes a first liquid inlet 130, a first liquid cooling channel 120, a first liquid outlet 140, an accommodating space 330, a second liquid inlet 230, a second liquid cooling channel 220, and a second liquid outlet 240 that are connected to each other. The circulating immersion channel is used for the circulation of immersion liquid.

[0052] The submersible liquid-cooled energy storage battery pack houses the battery 2000 within a housing space 330 provided within a frame structure 300. Openings are provided at both ends of the housing space 330 along a first direction, and the first liquid-cooling plate 100 and the second liquid-cooling plate 200 are respectively sealed at these openings, achieving a sealed housing of the battery 2000. A first liquid-cooling channel 120, a first inlet 130, and a first outlet 140 communicating with the first liquid-cooling channel 120 are provided within the first liquid-cooling plate 100. A second liquid-cooling channel 220, a second inlet 230, and a second outlet 240 communicating with the second liquid-cooling channel 220 are provided within the second liquid-cooling plate 200. The first outlet 140 and the second inlet 230 are both connected to the housing space 330, giving the submersible liquid-cooled energy storage battery pack the following characteristics: A circulating immersion channel for immersion and circulation is provided to achieve circulating immersion liquid cooling of the battery. The circulating immersion channel includes a first liquid inlet 130, a first liquid cooling channel 120, a first liquid outlet 140, a receiving space 330, a second liquid inlet 230, a second liquid cooling channel 220, and a second liquid outlet 240, which are in phase-connected. Under the drive of the circulating cooling drive device, the immersion liquid enters the circulating immersion channel through the first liquid inlet 130 and flows back to the circulating cooling drive device through the second liquid outlet 240. This allows the first liquid cooling plate 100 and the second liquid cooling plate 200 to contact and dissipate heat from the battery 2000 in the receiving space 330, while the immersion liquid provides immersion liquid cooling for the battery in the receiving space 330. This effectively improves the heat dissipation effect of the battery 2000, meets the actual heat dissipation requirements, and improves the safety of the battery 2000 in use and storage.

[0053] It should be noted that in this embodiment, the first direction is the vertical direction. The first liquid cooling plate 100 is located above the frame structure 300, and the second liquid cooling plate 200 is located below the frame structure 300. The circulating cooling drive device drives the immersion liquid to flow downward from the first liquid cooling plate 100 into the receiving space 330 of the frame structure 300, and then continues to flow downward into the second liquid cooling plate 200, finally returning to the circulating cooling drive device. Furthermore, the specific structure and working principle of the circulating cooling drive device are existing technologies and will not be described in detail here.

[0054] In addition, in other embodiments, additional channels may be added between the first liquid inlet 130, the first liquid cooling channel 120, the first liquid outlet 140, the accommodating space 330, the second liquid inlet 230, the second liquid cooling channel 220, and the second liquid outlet 240, according to actual needs. These additional channels, together with the first liquid inlet 130, the first liquid cooling channel 120, the first liquid outlet 140, the accommodating space 330, the second liquid inlet 230, the second liquid cooling channel 220, and the second liquid outlet 240, form a circulating immersion channel. This embodiment does not limit the specific extension path and composition structure of the circulating immersion channel.

[0055] As an optional solution, the submerged liquid-cooled battery pack also includes a support structure 400, which is located within the receiving space 330. At least one end of the battery 2000 near the second liquid-cooling plate 200 is provided with the support structure 400, which is used to mount and position the battery 2000. By providing the support structure 400 within the receiving space 330, and ensuring that at least one end of the battery 2000 near the second liquid-cooling plate 200 is provided with the support structure 400, and by mounting and positioning the battery 2000 using the support structure 400, the problem of free movement of the battery 2000 within the receiving space 330 is solved, further improving the protection of the battery 2000. It should be noted that in this embodiment, support structures 400 are provided at both the end of the battery 2000 near the second liquid-cooling plate 200 and the end near the first liquid-cooling plate 100, to position and fix the battery 2000 from both ends along a first direction, further improving the fixing effect of the battery 2000.

[0056] Specifically, such as Figure 7 As shown, the support structure 400 is provided with a positioning hole 410 and a flow guide hole 420. The positioning hole 410 and the flow guide hole 420 do not interfere with each other. The positioning hole 410 is used to position and fix the battery 2000, and the flow guide hole 420 provides guidance for the flow of the immersion liquid. By providing the positioning hole 410 and the flow guide hole 420 on the support structure 400 respectively, the battery 2000 is positioned and fixed by the positioning hole 410, and the flow guide hole 420 provides guidance for the flow of the immersion liquid, thus achieving a stable fixing effect for the battery 2000 while ensuring the normal flow of the immersion liquid.

[0057] In this embodiment, the submerged liquid-cooled storage battery pack contains 520 batteries 2000, each of which is a cylindrical battery. The axial direction of each battery 2000 within the accommodating space 330 is parallel to the first direction, and the diameter of each battery is between 18mm and 46mm. The support structure 400 is provided with 520 positioning holes 410, the inner diameter of which is adapted to the diameter of the corresponding battery 2000, and the shortest distance between two adjacent positioning holes 410 is not less than 2mm. Furthermore, the support structure 400 is provided with 273 flow guide holes 420, each with an inner diameter of 3.5 to 4.5mm.

[0058] In other embodiments, the specific number of positioning holes 410 on the support structure 400 can be adjusted according to the specific number of batteries 2000 required, and the specific specifications of the positioning holes 410 and the specific number of guide holes 420 can be adjusted according to the specific specifications of the batteries 2000. It is only necessary to ensure that the shortest distance between two adjacent positioning holes 410 is not less than 2mm, and that the positioning holes 410 and the guide holes 420 do not interfere with each other. This embodiment does not impose specific limitations.

[0059] In one alternative embodiment, the second liquid cooling plate 200 is provided with a pressure relief through hole 260, which does not interfere with the second liquid cooling flow channel 220. The pressure relief through hole 260 is sealed and connected to the positioning hole 410 in the support structure 400 near the second liquid cooling plate 200. The pressure relief valve of the battery 2000 is sealed and connected to the positioning hole 410 in the support structure 400 near the second liquid cooling plate 200. By providing a pressure relief through hole 260 on the second liquid cooling plate 200, it is ensured that the pressure relief through hole 260 and the second liquid cooling flow channel 220 do not interfere with each other. The pressure relief through hole 260 is sealed and connected to the positioning hole 410 in the support structure 400 near the second liquid cooling plate 200, and the pressure relief valve on the battery 2000 is sealed and connected to the positioning hole 410 in the support structure 400 near the second liquid cooling plate 200. This achieves the sealed connection between the pressure relief valve and the pressure relief through hole. On the basis of immersion liquid cooling of the battery 2000, it ensures that the gas generated after the battery 2000 explodes can be discharged to the outside along the positioning hole 410 and the downward through hole 260, further improving safety.

[0060] It should be noted that in this embodiment, the portion of the support structure 400 near the second liquid cooling plate 200 is sleeved on the end of the battery 2000, and the remaining portion extends towards the second liquid cooling plate 200 and abuts against the second liquid cooling plate 200, so that the positioning hole 410 and the pressure relief through hole 260 are directly connected in the first direction, and the flow guide hole 420 and the second liquid inlet 230 are directly connected in the second direction. This achieves the effect of mutual sealing and isolation between the pressure relief channel composed of the pressure relief valve, the positioning hole 410, and the pressure relief through hole 260 and the circulating immersion channel composed of the first liquid inlet 130, the first liquid cooling flow channel 120, the first liquid outlet 140, the accommodating space 330, the second liquid inlet 230, the second liquid cooling flow channel 220, and the second liquid outlet 240.

[0061] Now combined Figure 3 and Figure 4 The specific structure of the first liquid cooling plate 100 is described below. The first liquid cooling plate 100 includes two first plates 110 that are fastened together. A first groove 111 is provided on the first plate 110 that is away from the battery 2000 along a first direction. The first groove 111 is located on the fastening end face of the first plate 110. When the two first plates 110 are fastened together, the first groove 111 forms a first liquid cooling channel 120. A first liquid outlet 140 is provided on the first plate 110 that is close to the battery 2000 along the first direction. By splitting the first liquid cooling plate 100 into two interlocking first plates 110, a first groove 111 is provided on the first plate 110 away from the battery 2000 along a first direction, with the first groove 111 located on the interlocking end face of the first plate 110. A first liquid outlet 140 is provided on the other first plate 110. When the two first plates 110 are interlocked, the first groove 111 forms a first liquid cooling channel 120. The structure is simple and the design is ingenious. Moreover, the first plate 110 closer to the battery 2000 is a flat plate structure, which can further improve the space utilization rate within the accommodating space 330.

[0062] To ensure the circulation rate of the immersion liquid, the width of the first groove 111 is not less than 5 mm, and the depth of the first groove 111 along the first direction is not less than 5 mm. In this embodiment, the width of the first groove 111 is 8 mm, and the depth of the first groove 111 along the first direction is 5 mm. In other embodiments, the width of the first groove 111 and the depth of the first groove 111 can be adjusted arbitrarily within a range of not less than 5 mm, and are also arbitrarily adjusted within a range of not less than 5 mm along the first direction. This embodiment does not impose specific limitations.

[0063] Furthermore, in this embodiment, the first plate 110 includes a cooling area located in the central region and an installation area surrounding the cooling area. A first groove 111 is disposed in the cooling area, and the first groove 111 is arranged in a serpentine pattern throughout the cooling area to improve the contact liquid cooling heat dissipation effect of the first liquid cooling plate 100 on the battery 2000.

[0064] It should be noted that in this embodiment, the second liquid cooling plate 200 includes two second plates 210 that are interlocked and fixed together, and the second liquid cooling channel 220 on the second liquid cooling plate 200 is also formed by a groove provided on the second plate 210. To keep the text concise, the specific structure of the second liquid cooling plate 200 will not be described here.

[0065] Combination Figure 8 and Figure 9 The specific structure of the frame structure 300 is described below. The frame structure 300 has extension bosses 310 at both ends along the first direction. The extension bosses 310 extend along the open end face. Either of the two extension bosses 310 is sealed and fixed to the first liquid cooling plate 100, and the other is sealed and fixed to the second liquid cooling plate 200. By providing extension bosses 310 at both ends of the frame structure 300 along the first direction, and by using the extension bosses 310 to seal and fix to the first liquid cooling plate 100 and the second liquid cooling plate 200 respectively, the sealing effect between the first liquid cooling plate 100 and the frame structure 300, as well as the sealing effect between the second liquid cooling plate 200 and the frame structure 300, is ensured.

[0066] Specifically, the extension boss 310 includes a first extension 311 located inside the opening and a second extension 312 located outside the opening. The first extension 311 is locked and fixed to the first liquid cooling plate 100 or the second liquid cooling plate 200. The submersible liquid-cooled storage battery pack also includes sealant, which is used to seal the gap between the second extension 312 and the first liquid cooling plate 100 or the second liquid cooling plate 200. By splitting the extension boss 310 into a first extension 311 located outside the opening and a second extension 312 located inside the opening, the first extension 311 is locked and fixed to the first liquid cooling plate 100 or the second liquid cooling plate 200, and the sealant is filled into the gap between the second extension 312 and the first liquid cooling plate 100 or the second liquid cooling plate 200, the frame structure 300 is sealed and fixed to the first liquid cooling plate 100 and the second liquid cooling plate 200 respectively.

[0067] In this embodiment, as Figure 1 , Figure 3 , Figure 5 and Figure 9As shown, the immersion liquid-cooled storage battery pack also includes a fixing member 500. The first liquid cooling plate 100 is provided with a first fixing hole 150, the second liquid cooling plate 200 is provided with a second fixing hole 250, and the first extension 311 is provided with a third fixing hole 3111. The fixing member 500 is configured to be locked and fixed in sequence with the first fixing hole 150 and the third fixing hole 3111 or in sequence with the second fixing hole 250 and the third fixing hole 3111. The second extension 312 is provided with a second groove 3121 on the end face away from the battery 2000 along the first direction. The second groove 3121 forms a closed ring in the end face along the shape of the second extension 312. The space between the second groove 3121 and the first liquid cooling plate 100 or the second liquid cooling plate 200 is filled with sealant. By using fasteners 500 to lock and fix the first liquid cooling plate 100 to the frame structure 300 in sequence with the first fixing hole 150 on the first liquid cooling plate 100 and the third fixing hole 3111 on the first extension 311, the first liquid cooling plate 100 and the frame structure 300 are locked and fixed together. By using fasteners 500 to lock and fix the second liquid cooling plate 200 to the second fixing hole 250 on the second liquid cooling plate 200 and the third fixing hole 3111 on the first extension 311, the second liquid cooling plate 200 and the frame structure 300 are locked and fixed together. By providing a second groove 3121 on the end face of the second extension 312 away from the battery 2000 along the first direction, and filling the space between the second groove 3121 and the first liquid cooling plate 100 or the second liquid cooling plate 200 with sealant, sufficient sealant can be provided between the second extension 312 and the first liquid cooling plate 100 or the second liquid cooling plate 200 to ensure a good sealing effect. In addition, the second groove 3121 extends along the shape of the second extension 312 within the second extension 312, so that the second groove 3121 forms a closed ring within the second extension 312, thereby further ensuring the sealing effect of the sealant within the second groove 3121.

[0068] It should be noted that in this embodiment, the fastener 500 is a bolt. Internal threads are provided in the first fixing hole 150, the second fixing hole 250, and the third fixing hole 3111. The bolt is sequentially threaded into the first fixing hole 150 and the third fixing hole 3111 to lock the frame structure 300 to the first liquid cooling plate 100. Similarly, the bolt is sequentially threaded into the second fixing hole 250 and the third fixing hole 3111 to lock the frame structure 300 to the second liquid cooling plate 200. This threaded fixing method not only provides good fixation but also facilitates disassembly and assembly, making subsequent inspection and maintenance of the submerged liquid-cooled battery pack easier. In other embodiments, the frame structure 300 can also be locked to the first liquid cooling plate 100 or the second liquid cooling plate 200 by welding or bonding; this embodiment does not impose specific limitations.

[0069] To further improve the structural strength of the 300-meter frame structure, such as Figure 8As shown, the frame structure 300 is circumferentially spaced with reinforcing ribs 320 extending along the first direction. Furthermore, in this embodiment, a third fixing hole 3111 is provided on the reinforcing rib 320 to ensure the structural strength of the outer wall of the third fixing hole 3111.

[0070] In this embodiment, the frame structure 300 is provided with 32 reinforcing ribs 320 spaced circumferentially around the first direction. Each reinforcing rib 320 has a third fixing hole 3111 at both ends along the first direction. Each third fixing hole 3111 corresponds to a fixing member 500, a first fixing hole 150, or a second fixing hole 250. In other embodiments, the specific number of reinforcing ribs 320 can be adjusted according to actual needs; this embodiment does not impose a specific limitation.

[0071] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An immersion-type liquid-cooled storage battery pack, characterized in that, include: The frame structure (300) has a receiving space (330) for accommodating a battery (2000), the receiving space (330) having openings at both ends along a first direction; as well as A first liquid cooling plate (100) and a second liquid cooling plate (200), wherein the first liquid cooling plate (100) and the second liquid cooling plate (200) respectively seal the opening; The first liquid cooling plate (100) has a first liquid cooling channel (120) and a first liquid inlet (130) and a first liquid outlet (140) communicating with the first liquid cooling channel (120), and the first liquid outlet (140) is communicating with the accommodating space (330); The second liquid cooling plate (200) has a second liquid cooling channel (220) and a second liquid inlet (230) and a second liquid outlet (240) communicating with the second liquid cooling channel (220), and the second liquid inlet (230) is communicating with the accommodating space (330); The immersion liquid-cooled storage battery pack is provided with a circulating immersion channel, which includes a first liquid inlet (130), a first liquid-cooling channel (120), a first liquid outlet (140), a receiving space (330), a second liquid inlet (230), a second liquid-cooling channel (220), and a second liquid outlet (240) that are in phase-connected. The circulating immersion channel is used for the circulation of immersion liquid.

2. The immersion liquid-cooled storage battery pack according to claim 1, characterized in that, The immersion liquid-cooled storage battery pack also includes: A support structure (400) is located in the accommodating space (330), and the support structure (400) is provided at least at one end of the battery (2000) near the second liquid cooling plate (200). The support structure (400) is used to install and position the battery (2000).

3. The immersion liquid-cooled storage battery pack according to claim 2, characterized in that, The support structure (400) is provided with a positioning hole (410) and a flow guide hole (420). The positioning hole (410) and the flow guide hole (420) do not interfere with each other. The positioning hole (410) is used to position and fix the battery (2000), and the flow guide hole (420) provides guidance for the flow of the immersion liquid.

4. The immersion liquid-cooled storage battery pack according to claim 3, characterized in that, The second liquid cooling plate (200) is provided with a pressure relief through hole (260), the pressure relief through hole (260) and the second liquid cooling channel (220) do not interfere with each other, the pressure relief through hole (260) is sealed and connected with the positioning hole (410) in the support structure (400) near the second liquid cooling plate (200), and the pressure relief valve of the battery (2000) is sealed and connected with the positioning hole (410) in the support structure (400) near the second liquid cooling plate (200).

5. The immersion liquid-cooled storage battery pack according to any one of claims 1 to 4, characterized in that, The first liquid cooling plate (100) includes: Two first plates (110) are fastened together. A first groove (111) is provided on the first plate (110) that is away from the battery (2000) along the first direction. The first groove (111) is located on the fastening end face of the first plate (110). When the two first plates (110) are fastened together, the first groove (111) forms the first liquid cooling channel (120). The first liquid outlet (140) is provided on the first plate (110) that is close to the battery (2000) along the first direction among the two first plates (110).

6. The immersion liquid-cooled storage battery pack according to claim 5, characterized in that, The width of the first groove (111) is not less than 5mm, and the depth of the first groove (111) along the first direction is not less than 5mm.

7. The immersion liquid-cooled storage battery pack according to any one of claims 1 to 4, characterized in that, The frame structure (300) is provided with extension bosses (310) at both ends along the first direction. The extension bosses (310) extend along the end face of the opening. One of the two extension bosses (310) is sealed and fixed to the first liquid cooling plate (100), and the other is sealed and fixed to the second liquid cooling plate (200).

8. The immersion liquid-cooled storage battery pack according to claim 7, characterized in that, The extension boss (310) includes a first extension (311) located inside the opening and a second extension (312) located outside the opening; The first extension (311) is locked and fixed to the first liquid cooling plate (100) or the second liquid cooling plate (200). The immersion liquid-cooled storage battery pack also includes a sealant, which is used to seal the gap between the second extension (312) and the first liquid cooling plate (100) or the second liquid cooling plate (200).

9. The immersion liquid-cooled storage battery pack according to claim 8, characterized in that, The immersion liquid-cooled storage battery pack also includes a fixing member (500), the first liquid-cooled plate (100) is provided with a first fixing hole (150), the second liquid-cooled plate (200) is provided with a second fixing hole (250), the first extension (311) is provided with a third fixing hole (3111), and the fixing member (500) is configured to be locked and fixed to the first fixing hole (150) and the third fixing hole (3111) in sequence or to be locked and fixed to the second fixing hole (250) and the third fixing hole (3111) in sequence; And / or, the second extension (312) is provided with a second groove (3121) on the end face away from the battery (2000) along the first direction, the second groove (3121) forms a closed ring in the end face along the shape of the second extension (312), and the sealant is filled between the second groove (3121) and the first liquid cooling plate (100) or the second liquid cooling plate (200).

10. The immersion liquid-cooled storage battery pack according to any one of claims 1 to 4, characterized in that, The frame structure (300) is circumferentially spaced with reinforcing ribs (320) that extend along the first direction.

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