Immersion-type liquid-cooled energy storage battery pack

Abstract

The present application provides an immersion-type liquid-cooled energy storage battery pack. The immersion-type liquid-cooled energy storage battery pack comprises an enclosure structure (300), a first liquid-cooling plate (100) and a second liquid-cooling plate (200), wherein the enclosure structure (300) has an accommodating space (330) for accommodating a battery (2000), and two ends of the accommodating space (330) in a first direction are provided with openings; the first liquid-cooling plate (100) and the second liquid-cooling plate (200) block the openings respectively; the first liquid-cooling plate (100) has a first liquid-cooling flow channel (120) and a first liquid inlet (130) and a first liquid outlet (140) in communication with the first liquid-cooling flow channel (120), the first liquid outlet (140) being in communication with the accommodating space (330); and the second liquid-cooling plate (200) has a second liquid-cooling flow channel (220) and a second liquid inlet (230) and a second liquid outlet (240) in communication with the second liquid-cooling flow channel (220), the second liquid inlet (230) being in communication with the accommodating space (330). The immersion-type liquid-cooled energy storage battery pack is provided with a circulating immersion flow channel for circulating flow of an immersion liquid, wherein the circulating immersion flow channel comprises 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) in communication with one another.

Description

Immersed liquid-cooled storage battery pack

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 12, 2024, with application number 202422761555.X. The entire contents of the above application are incorporated by reference into this application.

[0002] Technical Field

[0003] The present application relates to the field of energy storage technology, and in particular to an immersion liquid-cooled storage battery pack.

[0004] Background Art

[0005] With the continuous advancement of science and technology, people's demand for batteries is gradually developing towards long life, high energy density, and high energy conversion efficiency. However, a single battery cannot meet these requirements. Therefore, battery packs, which combine multiple batteries in parallel or series, have emerged. During use, battery packs are prone to overheating, and in severe cases, thermal runaway or heat spread accidents may occur.

[0006] Technical issues

[0007] In related technologies, a liquid cooling plate is installed inside the battery pack, which is bonded to the plate to dissipate heat from the batteries within the pack. However, this cooling method has low efficiency, especially under high-rate charge and discharge conditions, where it cannot effectively dissipate heat from the batteries.

[0008] Technical Solutions

[0009] An embodiment of the present application provides an immersion liquid-cooled storage battery pack, comprising:

[0010] A frame structure having a storage space for accommodating batteries, wherein both ends of the storage space along a first direction are respectively provided with openings; and

[0011] a first liquid cooling plate and a second liquid cooling plate, wherein the first liquid cooling plate and the second liquid cooling plate respectively block the opening;

[0012] The first liquid cooling plate has a first liquid cooling channel and a first liquid inlet and a first liquid outlet communicated with the first liquid cooling channel, and the first liquid outlet is communicated with the accommodating space;

[0013] The second liquid cooling plate has a second liquid cooling channel and a second liquid inlet and a second liquid outlet communicated with the second liquid cooling channel, and the second liquid inlet is communicated with the accommodating space;

[0014] A circulating immersion flow channel is provided in the immersion liquid-cooled storage battery pack, and the circulating immersion flow channel includes the first liquid inlet, the first liquid cooling flow channel, the first liquid outlet, the accommodating space, the second liquid inlet, the second liquid cooling flow channel and the second liquid outlet, which are interconnected. The circulating immersion flow channel is used for circulating immersion liquid.

[0015] Beneficial effects

[0016] The immersion liquid-cooled energy storage battery pack provided by the present application realizes sealed accommodation of the battery by arranging an accommodation space in the enclosure structure, accommodating the battery in the accommodation space, and respectively arranging openings at both ends of the accommodation space along the first direction, and respectively sealing the first liquid-cooling plate and the second liquid-cooling plate at the openings, thereby realizing sealed accommodation of the battery. The first liquid-cooling flow channel and the first liquid inlet and the first liquid outlet communicated with the first liquid-cooling flow channel are arranged in the first liquid-cooling plate, and the second liquid inlet and the second liquid outlet communicated with the second liquid-cooling flow channel are arranged in the second liquid-cooling plate, so that the first liquid outlet is communicated with the accommodation space, and the second liquid inlet is communicated with the accommodation space, so that the immersion liquid-cooled energy storage battery pack has a function of providing an immersion circulation system. The circulating immersion channel realizes circulating immersion liquid cooling of the battery, and 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, so that the immersion liquid can enter the circulating immersion channel along the first liquid inlet under the drive of the circulating cooling drive device, and return to the circulating cooling drive device along the second liquid outlet, so that the first liquid cooling plate and the second liquid cooling plate can contact and dissipate heat for the battery in the receiving space, while the immersion liquid is used to immerse the battery in the receiving space for liquid cooling, thereby effectively improving the heat dissipation effect of the battery, meeting actual heat dissipation needs, and improving the safety of battery use and storage.

[0017] BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic structural diagram of an immersion liquid-cooled energy storage battery pack provided in an embodiment of the present application;

[0019] FIG2 is an exploded diagram of an immersion liquid-cooled energy storage battery pack provided in an embodiment of the present application;

[0020] FIG3 is a schematic structural diagram of a first liquid cooling plate provided in an embodiment of the present application;

[0021] FIG4 is a cross-sectional schematic diagram of a first liquid cooling plate provided in an embodiment of the present application;

[0022] FIG5 is a schematic structural diagram of a second liquid cooling plate provided in an embodiment of the present application;

[0023] FIG6 is a cross-sectional schematic diagram of a second liquid cooling plate provided in an embodiment of the present application;

[0024] FIG7 is a top view of a support structure provided in an embodiment of the present application;

[0025] FIG8 is a partial enlarged view of point A in FIG7;

[0026] FIG9 is a schematic structural diagram of a frame structure provided in an embodiment of the present application;

[0027] FIG10 is a partial enlarged view of point B in FIG9 .

[0028] In the picture:

[0029] 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;

[0030] 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 hole;

[0031] 300, frame structure; 310, extended boss; 311, first extension portion; 3111, third fixing hole; 312, second extension portion; 3121, second groove; 320, reinforcing rib; 330, accommodation space;

[0032] 400, support structure; 410, positioning hole; 420, diversion hole;

[0033] 500, fixings;

[0034] 2000. Battery. Modes for Carrying Out the Invention

[0035] During use, battery packs are prone to overheating, and in severe cases, thermal runaway or heat spread may occur. Related technologies employ a liquid cooling plate within the battery pack, attaching the batteries to the plate and utilizing heat transfer to dissipate heat from the battery pack. However, this cooling method is inefficient. For example, under high-rate battery charge and discharge conditions, it cannot effectively dissipate heat from the battery.

[0036] As shown in Figures 1 to 6, this embodiment provides an immersion-type liquid-cooled storage battery pack. The immersion-type liquid-cooled storage battery pack includes a frame structure 300, a first liquid-cooled plate 100, and a second liquid-cooled plate 200. The frame structure 300 has a storage space 330 configured to accommodate the battery 2000. The storage space 330 is provided with openings at both ends along the first direction. The first liquid-cooled plate 100 and the second liquid-cooled plate 200 respectively block the openings. The first liquid-cooled plate 100 has a first liquid-cooled flow channel 120 and a first liquid inlet 130 and a first liquid outlet 140 that are in communication with the first liquid-cooled flow channel 120. The first liquid outlet 140 is connected to the storage 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. A circulating immersion channel is provided in the immersion liquid-cooled storage battery pack. The circulating immersion channel includes 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 that are connected to each other. The circulating immersion channel is used for circulating immersion liquid.

[0037] The immersion-type liquid-cooled energy storage battery pack accommodates the battery 2000 in the accommodating space 330 by arranging an accommodating space 330 in the frame structure 300, and respectively arranges openings at both ends of the accommodating space 330 along the first direction, and respectively seals the first liquid-cooling plate 100 and the second liquid-cooling plate 200 at the openings, thereby achieving sealed accommodation of the battery 2000. The first liquid-cooling channel 120 and the first liquid inlet 130 and the first liquid outlet 140 communicated with the first liquid-cooling channel 120 are arranged in the first liquid-cooling plate 100, and the second liquid-cooling channel 220 and the second liquid inlet 230 and the second liquid outlet 240 communicated with the second liquid-cooling channel 220 are arranged in the second liquid-cooling plate 200, so that the first liquid outlet 140 is communicated with the accommodating space 330, and the second liquid inlet 230 is communicated with the accommodating space 330, so that the immersion-type liquid-cooled energy storage battery pack has A circulating immersion flow channel for immersion circulation flow is provided to realize circulating immersion liquid cooling of the battery, and the circulating immersion flow 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 that are connected to each other, so that the immersion liquid can enter the circulating immersion flow channel along the first liquid inlet 130 under the drive of the circulating cooling drive device, and flow back to the circulating cooling drive device along the second liquid outlet 240, so that the first liquid cooling plate 100 and the second liquid cooling plate 2000 in the receiving space 330 can contact and dissipate heat for the battery 2000 at the same time, while using the immersion liquid to immerse and liquid cool the battery in the receiving space 330, thereby effectively improving the heat dissipation effect of the battery 2000, meeting actual heat dissipation requirements, and improving the use safety and storage safety of the battery 2000.

[0038] 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 from the upper first liquid cooling plate 100 downward into the receiving space 330 of the frame structure 300, then continues to flow downward into the second liquid cooling plate 200, and finally flows back into the circulating cooling drive device. The structure and operating principle of the circulating cooling drive device are related art and will not be further described here.

[0039] 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, so that the remaining 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 constitute a circulating immersion channel. This embodiment does not limit the extension path and composition structure of the circulating immersion channel.

[0040] As an optional solution, the submerged liquid-cooled storage battery pack further includes a support structure 400, wherein the support structure 400 is located in the storage space 330 and is provided at least on the end of the battery 2000 proximate to the second liquid cooling plate 200. The support structure 400 is configured to mount and position the battery 2000. By providing the support structure 400 within the storage space 330 and ensuring that the support structure 400 is provided at least on the end of the battery 2000 proximate to the second liquid cooling plate 200, the battery 2000 is positioned and secured by the support structure 400, thereby preventing free movement of the battery 2000 within the storage space 330 and improving protection for the battery 2000. It should be noted that in this embodiment, the support structure 400 is provided on both the end of the battery 2000 proximate to the second liquid cooling plate 200 and the end proximate to the first liquid cooling plate 100, thereby positioning and securing the battery 2000 along the first direction from both ends of the battery 2000, thereby improving the securing effect of the battery 2000.

[0041] As shown in Figure 7, support structure 400 is provided with positioning holes 410 and diversion holes 420. Positioning holes 410 and diversion holes 420 do not interfere with each other. Positioning holes 410 are configured to position and fix batteries 2000, while diversion holes 420 provide guidance for the flow of immersion liquid. By providing positioning holes 410 and diversion holes 420 on support structure 400, which do not interfere with each other, positioning holes 410 are used to position and fix batteries 2000, while diversion holes 420 are used to guide the flow of immersion liquid. This achieves a stable fixation effect for batteries 2000 while ensuring the normal flow of immersion liquid.

[0042] In this embodiment, the submerged liquid-cooled storage battery pack contains a total of 520 batteries 2000, each of which is a cylindrical battery. The axial direction of each battery 2000 in the storage space 330 is parallel to the first direction, and the diameter of each battery is between 18 mm and 46 mm. 520 positioning holes 410 are correspondingly provided on the support structure 400. The inner diameter of each positioning hole 410 is adapted to the diameter of the corresponding battery 2000, and the shortest distance between two adjacent positioning holes 410 is not less than 2 mm. In addition, the support structure 400 is provided with 273 guide holes 420, and the inner diameter of each guide hole 420 is 3.5 to 4.5 mm.

[0043] In other embodiments, the number of positioning holes 410 on the support structure 400 can also be adjusted according to the required number of batteries 2000, and the specifications of the positioning holes 410 and the number of guide holes 420 can be adaptively adjusted according to the 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 2 mm, and the positioning holes 410 and the guide holes 420 do not interfere with each other. This embodiment does not limit this.

[0044] In an optional solution, a pressure relief hole 260 is provided on the second liquid cooling plate 200. The pressure relief hole 260 and the second liquid cooling channel 220 do not interfere with each other. The pressure relief 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 channel 220 do not interfere with each other, so that 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, thereby achieving sealed connection between the pressure relief valve and the pressure relief through hole. On the basis of immersing the battery 2000 in the immersion liquid for liquid cooling and heat dissipation, it is ensured 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, thereby improving the safety of the immersion liquid cooling storage battery pack.

[0045] 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 toward 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 along the first direction, and the guide hole 420 and the second liquid inlet 230 are directly connected along the second direction, thereby achieving 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 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.

[0046] The structure of the first liquid cooling plate 100 will now be described with reference to Figures 3 and 4 . The first liquid cooling plate 100 includes two first plates 110 that are fastened together. Of the two first plates 110, the first plate 110 that is located farther from the battery 2000 in a first direction is provided with a first groove 111. The first groove 111 is located on the fastening end surface 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. Of the two first plates 110, the first plate 110 that is located closer to the battery 2000 in the first direction is provided with a first liquid outlet 140. By splitting the first liquid cooling plate 100 into two first plates 110 that interlock and securely connect, a first groove 111 is provided on the first plate 110 of the two first plates 110 that is farther from the battery 2000 in the first direction, with the first groove 111 located at the interlocking end surface 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, resulting in a simple structure and ingenious design. Furthermore, the first plate 110 closest to the battery 2000 is a flat plate, which improves space utilization within the storage space 330.

[0047] To ensure the circulation flow rate of the immersion liquid, the width of the first groove 111 is no less than 5 mm, and the depth of the first groove 111 along the first direction is no 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 can be adjusted within a range of no less than 5 mm, and the depth of the first groove 111 can be adjusted within a range of no less than 5 mm along the first direction, and this embodiment does not limit this.

[0048] In addition, in this embodiment, the first plate body 110 includes a cooling area located in the central area and an installation area surrounding the outside of the cooling area. The first groove 111 is set in the cooling area, and the first groove 111 is serpentine-shaped and covers the entire cooling area to improve the contact liquid cooling and heat dissipation effect of the first liquid cooling plate 100 on the battery 2000.

[0049] In this embodiment, the second liquid cooling plate 200 includes two second plates 210 that are interlocked and fixed to each other, 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 ensure the brevity of the text, the structure of the second liquid cooling plate 200 is not further described here.

[0050] The structure of the frame structure 300 is described with reference to Figures 8 and 9 . Extended bosses 310 are provided at both ends of the frame structure 300 along the first direction. Extended bosses 310 extend along the open end surface. One of the two extended bosses 310 is sealed and fixed to the first liquid cooling plate 100, while the other is sealed and fixed to the second liquid cooling plate 200. By providing extended bosses 310 at both ends of the frame structure 300 along the first direction, and utilizing the extended bosses 310 to seal and fix to the first liquid cooling plate 100 and the second liquid cooling plate 200, respectively, a sealing effect is ensured between the first liquid cooling plate 100 and the frame structure 300, and between the second liquid cooling plate 200 and the frame structure 300.

[0051] The extended boss 310 includes a first extension portion 311 located within the opening and a second extension portion 312 located outside the opening. The first extension portion 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 configured to seal the gap between the second extension portion 312 and the first liquid cooling plate 100 or the second liquid cooling plate 200. By separating the extended boss 310 into the first extension portion 311 located outside the opening and the second extension portion 312 located inside the opening, the first extension portion 311 is locked and fixed to the first liquid cooling plate 100 or the second liquid cooling plate 200, and the sealant is filled in the gap between the second extension portion 312 and the first liquid cooling plate 100 or the second liquid cooling plate 200, thereby achieving a sealed and fixed effect between the frame structure 300 and the first liquid cooling plate 100 or the second liquid cooling plate 200.

[0052] In this embodiment, as shown in Figures 1, 3, 5 and 9, the immersion liquid-cooled storage battery pack further 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 portion 311 is provided with a third fixing hole 3111. The fixing member 500 is configured to be locked and fixed with the first fixing hole 150 and the third fixing hole 3111 in sequence or to be locked and fixed with the second fixing hole 250 and the third fixing hole 3111 in sequence; and / or, the end surface of the second extension portion 312 away from the battery 2000 along the first direction is provided with a second groove 3121, the second groove 3121 forms a closed circle within the end surface along the shape of the second extension portion 312, and sealant is filled between the second groove 3121 and the first liquid cooling plate 100 or the second liquid cooling plate 200. By using the fixing member 500 to lock and fix the first fixing hole 150 on the first liquid cooling plate 100 and the third fixing hole 3111 on the first extension portion 311 in sequence, the first liquid cooling plate 100 and the frame structure 300 are locked and fixed; by using the fixing member 500 to lock and fix the second fixing hole 250 on the second liquid cooling plate 200 and the third fixing hole 3111 on the first extension portion 311 in sequence, the second liquid cooling plate 200 and the frame structure 300 are locked and fixed; by providing a second groove 3121 on the end surface of the second extension portion 312 away from the battery 2000 in the first direction, and filling the sealant between the second groove 3121 and the first liquid cooling plate 100 or the second liquid cooling plate 200, it can be ensured that there is sufficient sealant between the second extension portion 312 and the first liquid cooling plate 100 or the second liquid cooling plate 200 for sealing, thereby ensuring a good sealing effect. In addition, the second groove 3121 extends in the second extension portion 312 along the shape of the second extension portion 312 , so that the second groove 3121 forms a closed circle in the second extension portion 312 to ensure the sealing effect of the sealant in the second groove 3121 .

[0053] In this embodiment, the fixing member 500 is a bolt, and the first fixing hole 150, the second fixing hole 250, and the third fixing hole 3111 are all provided with internal threads. The bolt is threadedly fixed to the first fixing hole 150 and the third fixing hole 3111 in sequence to lock and fix the frame structure 300 to the first liquid cooling plate 100, and the bolt is threadedly fixed to the second fixing hole 250 and the third fixing hole 3111 in sequence to lock and fix the frame structure 300 to the second liquid cooling plate 200. The threaded fixing method not only has a good fixing effect, but also is easy to disassemble and assemble, which facilitates the subsequent inspection and maintenance of the immersion liquid-cooled storage battery pack. In other embodiments, the frame structure 300 can also be locked and fixed to the first liquid cooling plate 100 or the second liquid cooling plate 200 by welding or bonding, etc., which is not limited in this embodiment.

[0054] To enhance the structural strength of the frame structure 300, as shown in Figure 8, the frame structure 300 is provided with reinforcing ribs 320 spaced apart circumferentially along the first direction. The reinforcing ribs 320 extend along the first direction. Furthermore, in this embodiment, the third fixing holes 3111 are disposed on the reinforcing ribs 320 to ensure the structural strength of the outer wall of the third fixing holes 3111.

[0055] In this embodiment, the frame structure 300 is provided with 32 reinforcing ribs 320 spaced apart circumferentially along the first direction. Each reinforcing rib 320 is provided with a third fixing hole 3111 at both ends along the first direction. Each third fixing hole 3111 is provided corresponding to a fixing member 500, a first fixing hole 150, or a second fixing hole 250. In other embodiments, the number of reinforcing ribs 320 may be adjusted according to actual needs, and this embodiment is not limited thereto.

Claims

1. Immersed liquid-cooled storage battery pack, including: The frame structure (300) has an accommodation space (330) for accommodating the battery (2000), and the accommodation space (330) is provided with 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 block 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) in communication with the first liquid cooling channel (120); the first liquid outlet (140) is in communication 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) in communication with the second liquid cooling channel (220), and the second liquid inlet (230) is in communication with the accommodating space (330); A circulating immersion flow channel is provided in the immersion liquid-cooled storage battery pack, wherein the circulating immersion flow channel comprises 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) which are interconnected, and the circulating immersion flow channel is used for circulating immersion liquid.

2. The immersion liquid-cooled storage battery pack according to claim 1, further comprising: A support structure (400) is located in the accommodating space (330), and at least one end of the battery (2000) close to the second liquid cooling plate (200) is provided with the support structure (400), and the support structure (400) is configured to install and position the battery (2000).

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

4. The immersion liquid-cooled storage battery pack according to claim 3, wherein: A pressure relief through hole (260) is provided on the second liquid cooling plate (200), 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 to 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 to 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, wherein: The first liquid cooling plate (100) comprises: Two first plates (110) are fastened together, and a first groove (111) is provided on one of the two first plates (110) that is away from the battery (2000) along the first direction. The first groove (111) is located at a fastening end surface 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) of the two first plates (110) that is closer to the battery (2000) along the first direction.

6. The immersion liquid-cooled storage battery pack according to claim 5, wherein: 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.

7. The immersion liquid-cooled storage battery pack according to any one of claims 1 to 4, wherein: The frame structure (300) is provided with extension bosses (310) at both ends along the first direction, and the extension bosses (310) extend along the open end surface. Any 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, wherein: The extension boss (310) comprises a first extension portion (311) located inside the opening and a second extension portion (312) located outside the opening; The first extension portion (311) is locked and fixed to the first liquid cooling plate (100) or the second liquid cooling plate (200), and the immersed liquid cooling storage battery pack further includes a sealant, which is configured to seal the gap between the second extension portion (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, further comprising a fixing member (500), wherein 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 portion (311) is provided with a third fixing hole (3111), and the fixing member (500) is configured to be locked and fixed with the first fixing hole (150) and the third fixing hole (3111) in sequence or to be locked and fixed with the second fixing hole (250) and the third fixing hole (3111) in sequence; And / or, a second groove (3121) is provided on the end surface of the second extension portion (312) away from the battery (2000) along the first direction, the second groove (3121) forms a closed circle along the shape of the second extension portion (312) within the end surface, 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, wherein: The frame structure (300) is covered with reinforcing ribs (320) at intervals around the circumference of the first direction, and the reinforcing ribs (320) extend along the first direction.

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