Liquid immersion cooled storage battery pack

Abstract

Liquid immersion-cooled storage battery pack, including: a frame structure (300) having a receiving space (330) for receiving a battery (2000), wherein the receiving space (330) has an opening at each end along a first direction; and 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) each seal one of the openings; wherein the first liquid cooling plate (100) has a first liquid cooling channel (120) as well as a first liquid inlet (130) and a first liquid outlet (140) which are connected to the first liquid cooling channel (120), wherein the first liquid outlet (140) is connected to the receiving chamber (330); wherein the second liquid cooling plate (200) has a second liquid cooling channel (220) as well as a second liquid inlet (230) and a second liquid outlet (240) which are connected to the second liquid cooling channel (220), wherein the second liquid inlet (230) is connected to the receiving chamber (330); wherein the liquid immersion-cooled storage battery pack is equipped internally with a circulating immersion flow channel comprising the first liquid inlet (130), the first liquid cooling channel (120), the first liquid outlet (140), the receiving chamber (330), the second liquid inlet (230), the second liquid cooling channel (220) and the second liquid outlet (240), which are interconnected, wherein the circulating immersion flow channel is designed for the circulating flow of an immersion fluid.

Description

TECHNICAL AREA

[0001] The present utility model relates to the technical field of energy storage, in particular a liquid immersion-cooled storage battery pack. STATE OF THE ART

[0002] With the continuous development of science and technology, human demands on batteries increasingly focus on long lifespan, high energy density, and high energy conversion efficiency. Individual batteries cannot meet these requirements. Therefore, battery packs have been developed that connect multiple batteries in parallel or in series. During use, the battery pack tends to overheat internally, which in severe cases can lead to thermal runaway or thermal expansion. TECHNICAL PROBLEM

[0003] In a related technique, heat dissipation from the batteries within the battery pack is achieved by attaching liquid cooling plates to the battery pack, which are in contact with the batteries, thus utilizing heat transfer. However, this method of heat dissipation has low efficiency, especially under conditions with high charge and discharge rates, meaning that the aforementioned method does not provide effective battery cooling. DISCLOSURE OF THE USE PATTERN

[0004] The embodiments of the present utility model provide a liquid immersion-cooled storage battery pack comprising the following: a frame structure having a receiving space for receiving a battery, wherein the receiving space has an opening at each end along a first direction, as well as a first liquid cooling plate and a second liquid cooling plate, wherein the first liquid cooling plate and the second liquid cooling plate each seal one of the openings; wherein the first liquid cooling plate has a first liquid cooling channel as well as a first liquid inlet and a first liquid outlet which are connected to the first liquid cooling channel, wherein the first liquid outlet is connected to the receiving space; wherein the second liquid cooling plate has a second liquid cooling channel as well as a second liquid inlet and a second liquid outlet which are connected to the second liquid cooling channel, wherein the second liquid inlet is connected to the receiving chamber; wherein the liquid immersion-cooled storage battery pack is equipped internally with a circulating immersion flow channel comprising the first liquid inlet, the first liquid cooling channel, the first liquid outlet, the receiving chamber, the second liquid inlet, the second liquid cooling channel and the second liquid outlet, which are interconnected, wherein the circulating immersion flow channel is designed for the circulating flow of an immersion liquid. BENEFICIAL EFFECTS

[0005] The liquid immersion-cooled energy storage battery pack according to the present utility model has a receiving compartment within the frame structure in which the batteries are housed, with openings provided at both ends of the receiving compartment along the first direction. The first liquid cooling plate and the second liquid cooling plate each close one of these openings, thereby achieving a sealed enclosure of the batteries.By equipping the first liquid cooling plate with a first liquid cooling channel, a first liquid inlet, and a first liquid outlet connected to the first liquid cooling channel, and the second liquid cooling plate with a second liquid cooling channel, a second liquid inlet, and a second liquid outlet connected to the second liquid cooling channel, wherein the first liquid outlet is connected to the receiving space and the second liquid inlet is connected to the receiving space, the liquid immersion-cooled energy storage battery pack is equipped with a circulating immersion flow channel for the circulating flow of an immersion, thereby enabling circulating immersion liquid cooling of the batteries.This circulating immersion flow channel comprises the first liquid inlet, the first liquid cooling channel, the first liquid outlet, the receiving chamber, the second liquid inlet, the second liquid cooling channel, and the second liquid outlet, all interconnected. Driven by a circulating cooling device, the immersion fluid enters the circulating immersion flow channel through the first liquid inlet and flows back to the circulating cooling device through the second liquid outlet. This enables contact cooling of the batteries in the receiving chamber by the first and second liquid cooling plates, while simultaneously the immersion fluid itself provides immersion cooling of the batteries within the receiving chamber. This effectively improves the heat dissipation performance of the batteries, meets actual cooling requirements, and enhances safety during battery use and storage. PRESENTATION OF REVELATION Fig. Figure 1 is a schematic structural representation of a liquid immersion-cooled energy storage battery pack according to an embodiment of the present utility model; Fig. Figure 2 is a schematic exploded view of a liquid immersion-cooled energy storage battery pack according to an embodiment of the present utility model; Fig. Figure 3 is a schematic structural representation of the first liquid cooling plate according to an embodiment of the present utility model; Fig. Figure 4 is a schematic sectional view of the first liquid cooling plate according to an embodiment of the present utility model; Fig. Figure 5 is a schematic structural representation of the second liquid cooling plate according to an embodiment of the present utility model; Fig. Figure 6 is a schematic sectional view of the second liquid cooling plate according to an embodiment of the present utility model; Fig. Figure 7 is a top view of the support structure according to an embodiment of the present utility model; Fig. Figure 8 is an enlarged partial view of area A in Fig. 7; Fig. Figure 9 is a schematic structural representation of the frame structure according to an embodiment of the present utility model; Fig. Figure 10 is an enlarged partial view of area B in Fig. 9. Reference symbol list: 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 mounting hole; 200. Second liquid cooling plate; 210. Second plate body; 220. Second liquid cooling channel; 230. Second liquid inlet; 240. Second liquid outlet; 250. Second mounting hole; 260. Pressure relief through-hole; 300. Frame structure; 310. Extended projection; 311. First extension section; 3111. Third mounting hole; 312. Second extension section; 3121. Second groove; 320. Reinforcing rib; 330. Receiving space; 400. Support structure; 410. Positioning hole; 420. Flow guide hole; 500. Fastener; 2000. Battery. SPECIFIC EXECUTION FORMS

[0006] During use, the battery pack tends to overheat internally, which in severe cases can lead to thermal runaway or thermal expansion. In related technologies, heat dissipation from the batteries within the battery pack is achieved by installing liquid cooling plates that are in contact with the batteries, utilizing heat transfer. However, this method of heat dissipation has low efficiency, especially under conditions with high charge and discharge rates, meaning that the aforementioned method does not provide effective battery cooling.

[0007] As in Fig. 1 to Fig. As shown in Figure 6, the present embodiment provides a liquid immersion-cooled storage battery pack. The liquid immersion-cooled storage battery pack comprises a frame structure 300, a first liquid cooling plate 100, and a second liquid cooling plate 200, wherein the frame structure 300 has a receiving space 330 designed to receive the battery 2000. The receiving space 330 is provided with an opening at each end along a first direction. The first liquid cooling plate 100 and the second liquid cooling plate 200 each close one of these openings. The first liquid cooling plate 100 has a first liquid cooling channel 120, as well as a first liquid inlet 130 and a first liquid outlet 140, which are connected to the first liquid cooling channel 120, the first liquid outlet 140 being connected to the receiving space 330.The second liquid cooling plate 200 has a second liquid cooling channel 220, as well as a second liquid inlet 230 and a second liquid outlet 240, which are connected to the second liquid cooling channel 220, with the second liquid inlet 230 being connected to the receiving chamber 330. The liquid immersion-cooled storage battery pack is internally equipped with a circulating immersion flow channel that includes the first liquid inlet 130, the first liquid cooling channel 120, the first liquid outlet 140, the receiving chamber 330, the second liquid inlet 230, the second liquid cooling channel 220, and the second liquid outlet 240, which are interconnected. The circulating immersion flow channel is designed for the circulating flow of an immersion fluid.

[0008] The liquid immersion-cooled energy storage battery pack enables the battery 2000 to be housed in a receiving space 330 within the frame structure 300. Openings are provided at both ends of the receiving space 330 along the first direction, which are closed by the first liquid cooling plate 100 and the second liquid cooling plate 200, thus achieving a sealed housing of the battery 2000.By equipping the first liquid cooling plate 100 with a first liquid cooling channel 120, a first liquid inlet 130, and a first liquid outlet 140 connected to the first liquid cooling channel 120, and the second liquid cooling plate 200 with a second liquid cooling channel 220, a second liquid inlet 230, and a second liquid outlet 240 connected to the second liquid cooling channel 220, wherein the first liquid outlet 140 and the second liquid inlet 230 are connected to the receiving space 330, the liquid immersion-cooled energy storage battery pack is equipped with a circulating immersion flow channel for the circulating flow of an immersion, thereby enabling circulating immersion liquid cooling of the battery.This circulating immersion flow channel comprises the first liquid inlet 130, the first liquid cooling channel 120, the first liquid outlet 140, the receiving chamber 330, the second liquid inlet 230, the second liquid cooling channel 220, and the second liquid outlet 240. Driven by a circulating cooling device, the immersion fluid can enter the circulating immersion flow channel through the first liquid inlet 130 and flow back to the circulating cooling device through the second liquid outlet 240. This enables contact cooling of the battery 2000 in the receiving chamber 330 by the first liquid cooling plate 100 and the second liquid cooling plate 200, while simultaneously the immersion fluid provides immersion cooling of the battery in the receiving chamber 330.This effectively improves the heat dissipation performance of the Battery 2000, meets actual cooling requirements, and increases safety in the use and storage of the Battery 2000.

[0009] 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 device causes the immersion fluid to flow downwards from the first liquid cooling plate 100, located above, into the receiving chamber 330 of the frame structure 300, then further downwards to the second liquid cooling plate 200, and finally back to the circulating cooling device. Furthermore, the structure and operating principle of the circulating cooling device are known in the art and are not described further here.

[0010] Furthermore, in other embodiments, additional channels can be added between the first liquid inlet 130, the first liquid cooling channel 120, the first liquid outlet 140, the receiving chamber 330, the second liquid inlet 230, the second liquid cooling channel 220, and the second liquid outlet 240, depending on actual requirements. These additional channels, together with the first liquid inlet 130, the first liquid cooling channel 120, the first liquid outlet 140, the receiving chamber 330, the second liquid inlet 230, the second liquid cooling channel 220, and the second liquid outlet 240, then form the circulating immersion flow channel. This embodiment does not specify the path or composition of the circulating immersion flow channel.

[0011] As an optional solution, the liquid immersion-cooled storage battery pack further includes a support structure 400, which is located in the receiving space 330. At least the end of the battery 2000 facing the second liquid cooling plate 200 is provided with the support structure 400. The support structure 400 is designed to mount and position the battery 2000. By providing the support structure 400 in the receiving space 330 and by arranging it at least at the end of the battery 2000 near the second liquid cooling plate 200, the battery 2000 is mounted and positioned by the support structure 400, thereby preventing free movement of the battery 2000 within the receiving space 330 and improving the protection of the battery 2000.It should be noted that in this embodiment, both the end of the battery 2000 near the second liquid cooling plate 200 and the end near the first liquid cooling plate 100 are provided with a support structure 400 to position and fix the battery 2000 along the first direction from both ends of the battery 2000, thereby improving the fixing effect of the battery 2000.

[0012] As in Fig. As shown in Figure 7, the support structure 400 is provided with a positioning hole 410 and a flow-guiding hole 420, the positioning hole 410 and the flow-guiding hole 420 being independent of each other. The positioning hole 410 is designed to position and fix the battery 2000, and the flow-guiding hole 420 ensures the flow of the immersion fluid. By providing non-interfering positioning holes 410 and flow-guiding holes 420 on the support structure 400, the battery 2000 is positioned and fixed by the positioning holes 410, while the flow-guiding holes 420 provide guidance for the flow of the immersion fluid. This enables stable fixation of the battery 2000 while simultaneously ensuring a normal flow of the immersion fluid.

[0013] In this embodiment, the liquid immersion-cooled storage battery pack contains a total of 520 batteries 2000, each battery 2000 being a cylindrical battery. The axis of each battery 2000 in the receiving space 330 runs parallel to the first direction, and the diameter of each battery is between 18 mm and 46 mm. The support structure 400 is accordingly equipped with 520 positioning holes 410, the inner diameter of each positioning hole 410 being adapted to the diameter of the corresponding battery 2000. The shortest distance between two adjacent positioning holes 410 is at least 2 mm. Furthermore, the support structure 400 is provided with 273 flow-guiding holes 420, the inner diameter of each flow-guiding hole 420 being between 3.5 mm and 4.5 mm.

[0014] In other embodiments, the number of positioning holes 410 on the support structure 400 can be adjusted depending on the required number of batteries 2000. Likewise, the specifications of the positioning holes 410 can be adapted to the specifications of the batteries 2000, and the number of flow-guiding holes 420 can be adjusted accordingly, provided that the shortest distance between two adjacent positioning holes 410 is not less than 2 mm and the positioning holes 410 and flow-guiding holes 420 do not interfere with each other. This embodiment does not specify this.

[0015] As an optional solution, the second liquid cooling plate 200 is provided with a pressure relief through-hole 260, whereby 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 to the positioning holes 410 in the support structure 400, which is located close to the second liquid cooling plate 200, while a pressure relief valve of the battery 2000 is sealed to the positioning hole 410 in the support structure 400, which is located close to the second liquid cooling plate 200.By providing the pressure relief through-hole 260 on the second liquid cooling plate 200, ensuring that the pressure relief through-hole 260 and the second liquid cooling channel 220 do not interfere with each other, a tight connection of the pressure relief through-hole 260 with the positioning holes 410 in the support structure 400 near the second liquid cooling plate 200 is achieved, as well as a tight connection of the pressure relief valve of the battery 2000 with the positioning holes 410 in the support structure 400 near the second liquid cooling plate 200.This enables a tight connection between the pressure relief valve and the pressure relief through-hole, which, based on the immersion liquid cooling of the battery 2000 by the immersion liquid, ensures that the gases generated after a pressure relief of the battery 2000 can be discharged to the outside along the positioning hole 410 and the pressure relief through-hole 260, thus increasing the safety of the liquid immersion-cooled storage battery pack.

[0016] In this embodiment, part of the support structure 400, which is located close to the second liquid cooling plate 200, is placed over the end of the battery 2000, while the remaining part extends towards the second liquid cooling plate 200 and is in contact with it, so that the positioning hole 410 is directly connected to the pressure relief through-hole 260 along the first direction and the flow guide hole 420 is directly connected to the second liquid inlet 230 along a second direction.This enables a tight separation between the pressure relief channel, consisting of the pressure relief valve, the positioning hole 410 and the pressure relief through-hole 260, and the circulating immersion flow channel, consisting of the first liquid inlet 130, the first liquid cooling channel 120, the first liquid outlet 140, the receiving chamber 330, the second liquid inlet 230, the second liquid cooling channel 220 and the second liquid outlet 240.

[0017] The structure of the first liquid cooling plate 100 is now being developed in conjunction with Fig. 3 and Fig. 4 explained. The first liquid cooling plate 100 comprises two first plate bodies 110, which are fixed to one another by snapping. The one of the two first plate bodies 110 that points away from the battery 2000 along the first direction is provided with a first groove 111 located on the snap-in end face of this first plate body 110. When the two first plate bodies 110 are fixed to one another by snapping, the first groove 111 forms the first liquid cooling channel 120. The one of the two first plate bodies 110 that is closest to the battery 2000 along the first direction is provided with the first liquid outlet 140.By dividing the first liquid cooling plate 100 into two first plate bodies 110, which are fixed together by snapping them together, and by providing the first groove 111 on the first plate body 110 that points away from the battery 2000 along the first direction, with the first groove 111 located on the snap-in end face of this plate body 110, and by providing the first liquid outlet 140 on the other first plate body 110, the first groove 111 forms the first liquid cooling channel 120 when the two first plate bodies 110 are snapped together. The structure is simple and the design is ingenious. Furthermore, the first plate body 110 that is closest to the battery 2000 is a flat plate, which improves the space utilization in the receiving chamber 330.

[0018] To ensure the circulation flow rate of the immersion fluid, 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 can be adjusted arbitrarily within a range of not less than 5 mm, and the depth of the first groove 111 along the first direction can be adjusted arbitrarily within a range of not less than 5 mm. This embodiment does not specify this.

[0019] Furthermore, in this embodiment, the first plate body 110 comprises a cooling area in the central region and a mounting area surrounding the cooling area. The first groove 111 is arranged in the cooling area, with the first groove 111 filling the cooling area in a serpentine arrangement to improve the contact cooling effect of the first liquid cooling plate 100 on the battery 2000.

[0020] In this embodiment, the second liquid cooling plate 200 comprises two second plate bodies 210, which are fixed to one another by snapping them together, and the second liquid cooling channel 220 on the second liquid cooling plate 200 is also formed by a groove arranged on the second plate body 210. To keep the description brief, the structure of the second liquid cooling plate 200 will not be explained further here.

[0021] The structure of the frame structure 300 is used in conjunction with Fig. 8 and Fig. 9 explained. The frame structure 300 is provided at both ends along the first direction with an extended projection 310, which extends along the end face of the opening. One of the two extended projections 310 is sealed to the first liquid cooling plate 100, and the other is sealed to the second liquid cooling plate 200. By providing the extended projections 310 at both ends of the frame structure 300 along the first direction, a tight seal between the first liquid cooling plate 100 and the second liquid cooling plate 200 is achieved with the extended projections 310, thereby ensuring a sealing effect between the first liquid cooling plate 100 and the frame structure 300, as well as between the second liquid cooling plate 200 and the frame structure 300.

[0022] The extended projection 310 comprises a first extension section 311 inside the opening and a second extension section 312 outside the opening. The first extension section 311 is firmly locked to the first liquid cooling plate 100 or the second liquid cooling plate 200. The liquid immersion-cooled storage battery pack further comprises a sealant designed to seal a gap between the second extension section 312 and the first liquid cooling plate 100 or the second liquid cooling plate 200.By dividing the extended projection 310 into a first extension section 311 inside the opening and a second extension section 312 outside the opening, the first extension section 311 is firmly locked to the first liquid cooling plate 100 or the second liquid cooling plate 200, and the sealing adhesive is used to fill the gap between the second extension section 312 and the first liquid cooling plate 100 or the second liquid cooling plate 200, thereby achieving a tight fixation of the frame structure 300 with the first liquid cooling plate 100 and the second liquid cooling plate 200.

[0023] In this embodiment, the liquid immersion-cooled storage battery pack comprises, as shown in Fig. 1, Fig. 3, Fig. 5 and Fig. Figure 9 shows a fastening element 500. The first liquid cooling plate 100 is provided with a first fastening hole 150, the second liquid cooling plate 200 is provided with a second fastening hole 250, and the first extension section 311 is provided with a third fastening hole 3111. The fastening element 500 is designed to be securely locked successively with the first fastening hole 150 and the third fastening hole 3111, or successively with the second fastening hole 250 and the third fastening hole 3111; and / or the second extension section 312 is provided on the end face, which points away from the battery 2000 along the first direction, with the second groove 3121 forming a closed circle along the shape of the second extension section 312 in the end face.A sealant is applied between the second groove 3121 and the first liquid cooling plate 100 or the second liquid cooling plate 200. A secure connection between the first liquid cooling plate 100 and the frame structure 300 is achieved by using the fastener 500, which is successively locked to the first mounting hole 150 on the first liquid cooling plate 100 and the third mounting hole 3111 of the first extension section 311. Similarly, a secure connection between the second liquid cooling plate 200 and the frame structure 300 is achieved by using the fastener 500, which is successively locked to the second mounting hole 250 of the second liquid cooling plate 200 and the third mounting hole 3111 of the first extension section 311.By providing the second groove 3121 on the end face of the second extension section 312, which points away from the battery 2000 in the first direction, and by filling the space between the second groove 3121 and the first liquid cooling plate 100 or the second liquid cooling plate 200 with a sealant, sufficient sealant is ensured to guarantee a seal and ensure the sealing effect. Furthermore, the second groove 3121 extends along the shape of the second extension section 312 within the second extension section 312, forming a closed loop within the second extension section 312 to ensure the sealing effect of the sealant in the second groove 3121.

[0024] In this embodiment, the fastening element 500 is a screw. The first fastening hole 150, the second fastening hole 250, and the third fastening hole 3111 are each provided with an internal thread. The screw is successively tightened into the first fastening hole 150 and the third fastening hole 3111 to securely connect the frame structure 300 to the first liquid cooling plate 100, and the screw is successively tightened into the second fastening hole 250 and the third fastening hole 3111 to securely connect the frame structure 300 to the second liquid cooling plate 200. The screw connection not only provides a secure fastening effect but is also easy to assemble and disassemble, which facilitates subsequent maintenance and servicing of the liquid immersion-cooled storage battery pack.In other embodiments, the frame structure 300 can also be permanently connected to the first liquid cooling plate 100 or the second liquid cooling plate 200 by welding or gluing. This embodiment does not specify this.

[0025] To increase the structural strength of the frame structure 300, the frame structure 300, as shown in Fig. Figure 8 shows reinforcing ribs 320 extending along the circumference of the first direction at regular intervals. Furthermore, in this embodiment, the third fastening hole 3111 is arranged on the reinforcing ribs 320 to ensure the structural strength of the outer wall of the third fastening hole 3111.

[0026] In this embodiment, the frame structure 300 is provided with 32 reinforcing ribs 320 at regular intervals along the circumferential direction of the first direction. Each reinforcing rib 320 is equipped at both ends along the first direction with a third fastening hole 3111, each third fastening hole 3111 being associated with a fastening element 500, a first fastening hole 150, or a second fastening hole 250. In other embodiments, the number of reinforcing ribs 320 can be adjusted according to actual requirements. This embodiment does not specify this.

[0027] The present utility model provides a liquid immersion-cooled energy storage battery pack. The liquid immersion-cooled energy storage battery pack comprises 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 receiving a battery (2000), the receiving space (330) having an opening at each end along a first direction. The first liquid cooling plate (200) and the second liquid cooling plate (300) each close one of these openings. The first liquid cooling plate (100) has a first liquid cooling channel (120), as well as a first liquid inlet (130) and a first liquid outlet (140) connected to the first liquid cooling channel (120), the first liquid outlet (140) being connected to the receiving space (330).The second liquid cooling plate (200) has a second liquid cooling channel (220), as well as a second liquid inlet (230) and a second liquid outlet (240) connected to the second liquid cooling channel (220), with the second liquid inlet (230) connected to the receiving chamber (330). The liquid immersion-cooled storage battery pack is equipped with a circulating immersion flow channel designed for the circulating flow of an immersion liquid. The circulating immersion flow channel comprises the first liquid inlet (130), the first liquid cooling channel (120), the first liquid outlet (140), the receiving chamber (330), the second liquid inlet (230), the second liquid cooling channel (220), and the second liquid outlet (240), which are interconnected.

Claims

[1] Liquid immersion cooled storage battery pack, comprising: a frame structure (300) having a receiving space (330) for receiving a battery (2000), wherein the receiving space (330) has an opening at each end along a first direction; and 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) each seal one of the openings; wherein the first liquid cooling plate (100) has a first liquid cooling channel (120) as well as a first liquid inlet (130) and a first liquid outlet (140) which are connected to the first liquid cooling channel (120), wherein the first liquid outlet (140) is connected to the receiving chamber (330); wherein the second liquid cooling plate (200) has a second liquid cooling channel (220) as well as a second liquid inlet (230) and a second liquid outlet (240) which are connected to the second liquid cooling channel (220), wherein the second liquid inlet (230) is connected to the receiving chamber (330); wherein the liquid immersion-cooled storage battery pack is equipped internally with a circulating immersion flow channel comprising the first liquid inlet (130), the first liquid cooling channel (120), the first liquid outlet (140), the receiving chamber (330), the second liquid inlet (230), the second liquid cooling channel (220) and the second liquid outlet (240), which are interconnected, wherein the circulating immersion flow channel is designed for the circulating flow of an immersion fluid. [2] Liquid immersion-cooled storage battery pack according to claim 1, further comprising: a support structure (400) located in the receiving space (330), wherein at least one end of the battery (2000), which faces the second liquid cooling plate (200), is provided with the support structure (400), wherein the support structure (400) is designed to mount and position the battery (2000). [3] Liquid immersion-cooled storage battery pack according to claim 2, wherein the support structure (400) is provided with a positioning hole (410) and a flow guide hole (420), wherein the positioning hole (410) and the flow guide hole (420) do not interfere with each other, wherein the positioning hole (410) is designed to position and fix the battery (2000), and the flow guide hole (420) provides flow guidance for the immersion fluid. [4] Liquid immersion-cooled storage battery pack according to claim 3, wherein the second liquid cooling plate (200) is provided with a pressure relief through-hole (260), wherein the pressure relief through-hole (260) and the second liquid cooling channel (220) do not interfere with each other, wherein the pressure relief through-hole (260) is sealedly connected to the positioning holes (410) in the support structure (400) which is arranged close to the second liquid cooling plate (200), while a pressure relief valve of the battery (2000) is sealedly connected to the positioning hole (410) in the support structure (400) which is arranged close to the second liquid cooling plate (200). [5] Liquid immersion cooled storage battery pack according to any one of claims 1 to 4, wherein the first liquid cooling plate (100) comprises: two first plate bodies (110) that are fixed to each other by snapping, wherein the one of the two first plate bodies (110) that points away from the battery (2000) along the first direction is provided with a first groove (111) located on the snap-in end surface of this first plate body (110), wherein the first groove (111) forms the first liquid cooling channel (120) when the two first plate bodies (110) are fixed to each other by snapping; wherein the one of the first two plate bodies (110) that is closest along the first direction of the battery (2000) is provided with the first liquid outlet (140). [6] Liquid immersion cooled storage battery pack according to claim 5, wherein the groove 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] Liquid immersion cooled storage battery pack according to one of claims 1 to 4, wherein the frame structure (300) is provided at both ends along the first direction with an extended projection (310) which extends along the end face of the opening, wherein one of the two extended projections (310) is sealed to the first liquid cooling plate (100) and the other to the second liquid cooling plate (200). [8] Liquid immersion cooled storage battery pack according to claim 7, wherein the extended projection (310) comprises a first extension section (311) inside the opening and a second extension section (312) outside the opening; wherein the first extension section (311) is firmly locked to the first liquid cooling plate (100) or the second liquid cooling plate (200), wherein the liquid immersion cooled storage battery pack further comprises a sealing adhesive designed to seal a gap between the second extension section (312) and the first liquid cooling plate (100) or the second liquid cooling plate (200). [9] Liquid immersion cooled storage battery pack according to claim 8, further comprising a fastening element (500), wherein the first liquid cooling plate (100) is provided with a first fastening hole (150), the second liquid cooling plate (200) with a second fastening hole (250) and the first extension section (311) with a third fastening hole (3111), wherein the fastening element (500) is designed to be securely locked successively with the first fastening hole (150) and the third fastening hole (3111) or successively with the second fastening hole (250) and the third fastening hole (3111);and / or wherein the second extension section (312) is provided at the end surface facing away from the battery (2000) in the first direction with a second groove (3121) which forms a closed circle along the shape of the second extension section (312) in the end surface, wherein the sealant is filled between the second groove (3121) and the first liquid cooling plate (100) or the second liquid cooling plate (200). [10] Immersion-cooled storage battery pack according to any one of claims 1 to 4, wherein the frame structure (300) is provided at regular intervals along the circumferential direction of the first direction with reinforcing ribs (320) extending along the first direction.

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