An immersed liquid-cooled battery pack and an immersed liquid-cooled energy storage battery system thereof

Abstract

The application discloses an immersed liquid-cooled battery pack and an immersed liquid-cooled energy storage battery system, and belongs to the technical field of lithium battery energy storage systems.The immersed liquid-cooled battery pack comprises a box body, a module support and a battery cell module; the bottom of the box body is provided with a bottom liquid-cooled plate, the bottom liquid-cooled plate has an outer cooling liquid flow channel inside, and the two ends of the outer cooling liquid flow channel are connected with a liquid inlet and a liquid outlet, respectively; the box body has non-circulating cooling liquid inside; an explosion-proof valve on the battery cell module is immersed in the non-circulating cooling liquid; the liquid level of the non-circulating cooling liquid is lower than the top surface of the battery cell module; the immersed liquid-cooled battery pack exchanges heat with the non-circulating cooling liquid in the box body through the outer circulating cooling liquid flowing in the outer cooling liquid flow channel, so that the heat generated in the battery pack is transferred to achieve a cooling effect. The application realizes efficient and uniform heat dissipation through indirect liquid cooling circulation of the bottom liquid-cooled plate, and improves the overall reliability of the system.

Description

Technical Field

[0001] This invention patent belongs to the field of lithium battery energy storage system technology, specifically relating to an immersion liquid-cooled battery pack and its immersion liquid-cooled energy storage battery system. Background Technology

[0002] Immersion liquid cooling technology is an important heat dissipation method for lithium battery energy storage systems. It involves completely or partially immersing the lithium battery and other hardware in an insulating coolant to achieve rapid and efficient heat dissipation. Compared to traditional heat dissipation methods, immersion liquid cooling offers significantly more effective heat dissipation performance.

[0003] In existing technologies, immersion liquid cooling systems typically submerge the entire battery in coolant. While this effectively dissipates heat, it also presents challenges such as high coolant consumption, increased battery pack weight, complex upper sealing structures, and stringent compatibility requirements between electrical components and the coolant. Furthermore, if the coolant fails to completely cover critical thermal runaway areas of the battery cell (such as explosion-proof valves), safety hazards may still exist. Therefore, reducing system costs and simplifying structural design while ensuring both heat dissipation efficiency and safety has become a pressing technical challenge in this field. Summary of the Invention

[0004] This invention provides an immersion liquid-cooled battery pack and its immersion liquid-cooled energy storage battery system, aiming to solve the problems of large coolant consumption, complex structure, high cost, and room for improvement in safety in existing immersion liquid-cooled systems.

[0005] The technical solution of this invention is implemented as follows:

[0006] An immersion liquid-cooled battery pack includes a housing, a module support, and a cell module. A bottom liquid-cooling plate is provided at the bottom of the housing, and the bottom liquid-cooling plate has an external coolant channel. The two ends of the external coolant channel are connected to an inlet and an outlet, respectively. The housing contains a non-circulating coolant. An explosion-proof valve on the cell module is immersed in the non-circulating coolant. The level of the non-circulating coolant is lower than the top surface of the cell module.

[0007] The immersion liquid-cooled battery pack achieves cooling by exchanging heat between the external circulating coolant flowing in the external coolant channel and the non-circulating coolant inside the casing, thereby transferring the heat generated inside the battery pack.

[0008] Preferably, the explosion-proof valve on the cell module is positioned opposite to the bottom of the housing, and the explosion-proof valve is completely submerged in the non-circulating coolant. More preferably, the opposite positioning of the explosion-proof valve to the bottom of the housing is achieved by inverting the cell module within the housing. This invention uses an inverted cell module configuration, with the explosion-proof valve located at the bottom of the battery pack and completely submerged in coolant. This allows the coolant to rapidly dissipate heat from the cell module during the initial stages of thermal runaway, preventing the occurrence and spread of thermal runaway and further improving the safety performance of the battery pack.

[0009] Preferably, the terminals of the battery cell module are immersed in the non-circulating coolant.

[0010] Preferably, there are module gaps between the battery cell modules, and the non-circulating coolant is filled in the module gaps to achieve sufficient cooling of the battery cell modules.

[0011] Preferably, the level of the non-circulating coolant is lower than the top surface of the battery cell module; more preferably, the non-circulating coolant occupies 1 / 3 to 2 / 3 of the battery's volume; even more preferably, the non-circulating coolant occupies half of the battery's volume. The non-circulating coolant is semi-submerged, achieving both immersion cooling and complete coverage of the explosion-proof valve to ensure the battery pack's safety.

[0012] Preferably, the enclosure includes a top cover and a housing that matches the top cover, with a bottom liquid cooling plate provided at the bottom of the housing.

[0013] Preferably, the housing is provided with a leakage indicator light and a liquid level sensing terminal; the leakage indicator light is used for leakage indication, and the liquid level sensing terminal is a connection terminal for a liquid level sensing device.

[0014] Preferably, the immersion liquid-cooled battery pack further includes a liquid level detector, which is connected to the liquid level sensing terminal and is used to sense the liquid level of the non-circulating coolant in the immersion liquid-cooled battery pack.

[0015] Preferably, the housing is equipped with a pressure relief valve.

[0016] Preferably, the immersion liquid-cooled battery pack further includes a busbar and a fuse, and the cell module is connected to the fuse through the busbar.

[0017] Preferably, the immersion liquid-cooled battery pack further includes a battery management system, which is connected to the cell module.

[0018] Preferably, the module support includes a cell support block and an end plate support block.

[0019] Preferably, the liquid inlet and the liquid outlet are disposed on the bottom liquid cooling plate, and the liquid inlet, the external coolant flow channel, and the liquid outlet of the bottom liquid cooling plate constitute the flow channel for the external circulating coolant. More preferably, the external coolant flow channel is arranged in a serpentine pattern (adjacent pipes are connected in a U-shape).

[0020] Preferably, the bottom liquid cooling plate is circulated with external circulating coolant, and the bottom liquid cooling plate is connected to the external circulation system through the liquid inlet and the liquid outlet. This structure, in conjunction with the aforementioned semi-immersion configuration of the non-circulating coolant, further ensures effective heat dissipation of the explosion-proof valve while reducing coolant consumption and lowering costs.

[0021] Preferably, the non-circulating coolant is an insulating coolant; the external circulating coolant is preferably a water-based insulating coolant. In this embodiment, the coolant is a fluorinated liquid or mineral oil with good insulation properties and high thermal conductivity, further improving system safety and heat dissipation performance.

[0022] In summary, the submersible liquid-cooled battery pack of this invention has its cell module terminals and explosion-proof valves located in non-circulating coolant, with the level of the non-circulating coolant lower than the top surface of the cell module. By assembling the cells inverted into modules, the cell explosion-proof valves can be completely submerged in coolant even when the volume of the non-circulating coolant is only part of the battery pack. Furthermore, the fact that the cell explosion-proof valves face the bottom of the casing further improves the safety performance of the battery pack. At the same time, by reducing the volume of the battery pack coolant, the weight of the battery pack is reduced, the sealing level design of the upper structure of the battery pack is lowered, and the compatibility requirements between the electrical components of the upper part of the battery pack and the coolant are reduced. Through these methods, the cost of the battery pack is greatly reduced while effectively improving its safety performance.

[0023] The present invention also provides an immersion liquid-cooled energy storage battery system, including a shelf, a refrigeration unit, an inlet pipe, a return pipe, and multiple immersion liquid-cooled battery packs; one end of the inlet pipe is connected to the outlet of the refrigeration unit, and the other end of the inlet pipe is connected to the inlet of each immersion liquid-cooled battery pack; the outlet of each immersion liquid-cooled battery pack is connected to the return port of the refrigeration unit through the return pipe; the non-circulating coolant in the immersion liquid-cooled battery pack dissipates heat through indirect heat exchange with the external circulating coolant flowing in the bottom liquid-cooling plate.

[0024] Preferably, the refrigeration unit, the liquid inlet pipe, the liquid return pipe, and the immersion liquid-cooled battery pack are all located inside the shelf.

[0025] In the submerged liquid-cooled energy storage battery system of this embodiment, the refrigeration unit supplies external circulating coolant to the bottom liquid-cooled plate of each battery pack through the inlet pipe. As the external circulating coolant flows through the bottom liquid-cooled plate, it exchanges heat with the non-circulating coolant within the battery pack. The heated external circulating coolant then returns to the refrigeration unit through the return pipe to dissipate heat, forming a closed-loop cooling cycle. This submerged liquid-cooled energy storage battery system provides uniform heat dissipation and high efficiency, making it suitable for large-scale energy storage scenarios.

[0026] In the submerged liquid-cooled energy storage battery system of this invention, the heat from the cell modules in the battery pack can be transferred more quickly to the surrounding non-circulating coolant. The coolant in the housing carries away heat through indirect heat exchange with the water-based external circulating coolant in the bottom liquid-cooled plate. The external circulating coolant enters the refrigeration unit through the return pipe. In the secondary cooling circuit of the liquid-cooled energy storage battery system, the water-based external circulating coolant transfers heat to the external environment through the heat exchange module. Compared with traditional heat dissipation methods, the submerged liquid-cooled energy storage battery system of this invention provides more effective heat dissipation performance while ensuring the safe operation of the system.

[0027] This invention, through the synergistic effect of inverted cell module design, partial immersion cooling, and bottom liquid cooling plate, significantly reduces system cost and structural complexity while ensuring heat dissipation and safety, and has high practical value and promotion prospects.

[0028] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0029] 1. This invention uses an inverted cell module design to completely immerse the explosion-proof valve and the terminal post in non-circulating coolant, thereby improving heat dissipation efficiency in the early stages of thermal runaway and enhancing safety;

[0030] 2. This invention reduces coolant usage, thereby lowering battery pack weight and cost;

[0031] 3. This invention reduces the sealing level and electrical component compatibility requirements of the upper part of the battery pack, simplifying the structural design;

[0032] 4. This invention achieves efficient and uniform heat dissipation by using an indirect liquid cooling cycle through a bottom liquid cooling plate, thereby improving the overall reliability of the system. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of an immersion liquid-cooled battery pack provided in an embodiment of the present invention;

[0035] Figure 2 This is an exploded structural diagram of an immersion liquid-cooled battery pack provided in an embodiment of the present invention;

[0036] Figure 3 This is a partial exploded structural diagram of an immersed liquid-cooled battery pack (top cover removed) provided in an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the module support and cell module of the immersion liquid-cooled battery pack provided in an embodiment of the present invention.

[0038] Figure 5 This is a top view of the submersible liquid-cooled battery pack (with the top cover removed) provided in an embodiment of the present invention.

[0039] Figure 6 For Figure 5 A cross-sectional view of section AA in the middle section;

[0040] Figure 7 This is a schematic diagram of the structure of an immersed liquid-cooled energy storage battery system provided in an embodiment of the present invention.

[0041] The components are: 1-box body, 2-module support, 3-cell module, 4-liquid level detector, 5-battery management system, 11-bottom liquid cooling plate, 12-non-circulating coolant, 13-top cover, 14-shell, 15-leakage indicator light, 16-liquid level sensor terminal, 17-pressure relief valve, 111-external coolant flow channel, 112-inlet, 113-outlet, 114-external circulating coolant, 21-cell support block, 22-end plate support block, 31-explosion-proof valve, 32-terminal post, 33-module gap, 34-busbar, 35-fuse, 10-immersion liquid-cooled battery pack, 20-shelf, 30-refrigeration unit, 40-inlet pipe, 50-return pipe, 301-refrigeration unit outlet, 302-refrigeration unit return port. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, top, bottom, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] It should be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0046] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0047] Currently, existing immersion liquid cooling systems suffer from problems such as large coolant consumption, complex structure, high cost, and room for safety improvement. To address these technical issues, this invention proposes an immersion liquid-cooled energy storage battery system.

[0048] Example 1

[0049] like Figures 1 to 6As shown, this embodiment provides an immersion liquid-cooled battery pack 10, including a housing 1, a module support 2, and a cell module 3; a bottom liquid cooling plate 11 is provided at the bottom of the housing 1, and the bottom liquid cooling plate 11 has an external coolant channel 111, the two ends of the external coolant channel 111 being connected to an inlet 112 and an outlet 113 respectively; a non-circulating coolant 12 is provided inside the housing 1; the explosion-proof valve 31 on the cell module 3 is immersed in the non-circulating coolant 12; the liquid level of the non-circulating coolant 12 is lower than the top surface of the cell module 3;

[0050] The immersion liquid-cooled battery pack exchanges heat with the non-circulating coolant 12 in the housing 1 through the external circulating coolant 114 flowing in the external coolant channel 111, thereby transferring the heat generated in the battery pack to achieve a cooling effect.

[0051] Preferably, the explosion-proof valve 31 on the cell module 3 is positioned opposite to the bottom of the housing 1, and the explosion-proof valve 31 is completely submerged in the non-circulating coolant 12. More preferably, the opposite positioning of the explosion-proof valve 31 to the bottom of the housing 1 is achieved by inverting the cell module 3 within the housing 1. This invention uses an inverted cell module configuration, with the explosion-proof valve located at the bottom of the battery pack and completely submerged in coolant. This allows the coolant to quickly remove heat from the cell module during the early stages of thermal runaway, preventing the occurrence and spread of thermal runaway and further improving the safety performance of the battery pack.

[0052] Preferably, the terminal post 32 of the battery cell module 3 is immersed in the non-circulating coolant 12.

[0053] Preferably, there is a module gap 33 between the battery cell modules 3, and the non-circulating coolant 12 is filled in the module gap 33 to achieve sufficient cooling of the battery cell modules 3.

[0054] Preferably, the level of the non-circulating coolant 12 is lower than the top surface of the cell module 3; more preferably, the non-circulating coolant 12 occupies 1 / 3 to 2 / 3 of the battery's volume; more preferably, the non-circulating coolant 12 occupies half of the battery's volume. The non-circulating coolant 12 is semi-submerged, achieving both immersion cooling and complete coverage of the explosion-proof valve 31 to ensure the safety of the battery pack.

[0055] Preferably, the housing 1 includes a top cover 13 and a shell 14 that matches the top cover 13, and a bottom liquid cooling plate 11 is provided at the bottom of the shell 14.

[0056] Preferably, the housing 1 is provided with a leakage indicator light 15 and a liquid level sensing terminal 16; the leakage indicator light 15 is used for leakage indication, and the liquid level sensing terminal 16 is a connection terminal for a liquid level sensing device.

[0057] Preferably, the immersion liquid-cooled battery pack 10 further includes a liquid level detector 4, which is connected to the liquid level sensing terminal 16 and is used to sense the liquid level height of the non-circulating coolant 12 in the immersion liquid-cooled battery pack 10.

[0058] Preferably, the housing 1 is provided with a pressure relief valve 17.

[0059] Preferably, the immersion liquid-cooled battery pack 10 further includes a busbar 34 and a fuse 35, and the cell module 3 is connected to the fuse 35 through the busbar 34.

[0060] Preferably, it also includes a battery management system 5, which is connected to the cell module 3.

[0061] Preferably, the module support 2 includes a cell support block 21 and an end plate support block 22.

[0062] Preferably, the inlet 112 and the outlet 113 are disposed on the bottom liquid cooling plate 11, and the inlet 112, the external coolant flow channel 111, and the outlet 113 of the bottom liquid cooling plate 11 constitute the flow channel for the external circulating coolant 114. More preferably, the external coolant flow channel 111 is arranged in a serpentine pattern (adjacent channels are connected in a U-shape), and the cross-section of the external coolant flow channel 111 is as shown below. Figure 6 As shown in the image.

[0063] Preferably, the bottom liquid cooling plate 11 is circulated with external circulating coolant 114, and the bottom liquid cooling plate 11 is connected to the external circulation system through the liquid inlet 112 and the liquid outlet 113. This structure, in conjunction with the semi-immersion arrangement of the non-circulating coolant 12, further ensures effective heat dissipation of the explosion-proof valve 31 while reducing coolant consumption and lowering costs.

[0064] Preferably, the non-circulating coolant 12 is an insulating coolant; the external circulating coolant 114 is preferably a water-based insulating coolant. In this embodiment, the coolant is selected from fluorinated liquids or mineral oils with good insulation properties and high thermal conductivity, further improving system safety and heat dissipation performance.

[0065] In summary, the submersible liquid-cooled battery pack of this invention has its cell module terminals and explosion-proof valves located in non-circulating coolant, with the level of the non-circulating coolant lower than the top surface of the cell module. By assembling the cells inverted into modules, the cell explosion-proof valves can be completely submerged in coolant even when the volume of the non-circulating coolant is only part of the battery pack. Furthermore, the fact that the cell explosion-proof valves face the bottom of the casing further improves the safety performance of the battery pack. At the same time, by reducing the volume of the battery pack coolant, the weight of the battery pack is reduced, the sealing level design of the upper structure of the battery pack is lowered, and the compatibility requirements between the electrical components of the upper part of the battery pack and the coolant are reduced. Through these methods, the cost of the battery pack is greatly reduced while effectively improving its safety performance.

[0066] Example 2

[0067] like Figure 7 As shown, this embodiment provides an immersion liquid-cooled energy storage battery system, including a shelf 20, a refrigeration unit 30, an inlet pipe 40, a return pipe 50, and multiple immersion liquid-cooled battery packs 10 as described in Embodiment 1; one end of the inlet pipe 40 is connected to the outlet 301 of the refrigeration unit, and the other end of the inlet pipe 40 is connected to the inlet 112 of each immersion liquid-cooled battery pack 10; the outlet 113 of each immersion liquid-cooled battery pack 10 is connected to the return port 302 of the refrigeration unit through the return pipe 50; the non-circulating coolant 12 in the immersion liquid-cooled battery pack 10 dissipates heat through indirect heat exchange with the external circulating coolant 114 flowing in the bottom liquid cooling plate 11.

[0068] Preferably, the refrigeration unit 30, the liquid inlet pipe 40, the liquid return pipe 50, and the immersion liquid-cooled battery pack 10 are all located inside the shelf 20.

[0069] In the submerged liquid-cooled energy storage battery system of this embodiment, the refrigeration unit 30 supplies external circulating coolant 114 to the bottom liquid cooling plate 11 of each battery pack 10 through the liquid inlet pipe 40. The external circulating coolant 114 exchanges heat with the non-circulating coolant 12 within the battery pack as it flows through the bottom liquid cooling plate 11. The heated external circulating coolant 114 then returns to the refrigeration unit 30 through the liquid return pipe 50 for heat dissipation, forming a closed-loop cooling cycle. This submerged liquid-cooled energy storage battery system provides uniform heat dissipation and high efficiency, making it suitable for large-scale energy storage scenarios.

[0070] In the submerged liquid-cooled energy storage battery system of this invention, the heat from the cell modules in the battery pack can be transferred more quickly to the surrounding non-circulating coolant. The coolant in the housing carries away heat through indirect heat exchange with the water-based external circulating coolant in the bottom liquid-cooled plate. The external circulating coolant enters the refrigeration unit through the return pipe. In the secondary cooling circuit of the liquid-cooled energy storage battery system, the water-based external circulating coolant transfers heat to the external environment through the heat exchange module. Compared with traditional heat dissipation methods, the submerged liquid-cooled energy storage battery system of this invention provides more effective heat dissipation performance while ensuring the safe operation of the system.

[0071] This invention, through the synergistic effect of inverted cell module design, partial immersion cooling, and bottom liquid cooling plate, significantly reduces system cost and structural complexity while ensuring heat dissipation and safety, and has high practical value and promotion prospects.

[0072] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0073] 1. The present invention uses an inverted design for the battery cell module 3 to completely immerse the explosion-proof valve 31 and the terminal post 32 in the non-circulating coolant 12, thereby improving the heat dissipation efficiency in the early stage of thermal runaway and enhancing safety.

[0074] 2. This invention reduces coolant usage, thereby lowering battery pack weight and cost;

[0075] 3. This invention reduces the sealing level and electrical component compatibility requirements of the upper part of the battery pack, simplifying the structural design;

[0076] 4. The present invention achieves efficient and uniform heat dissipation by using an indirect liquid cooling cycle through the bottom liquid cooling plate 11, thereby improving the overall reliability of the system.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An immersion liquid-cooled battery pack, characterized in that: The device includes a housing, module support components, and battery cell modules. A bottom liquid cooling plate is installed at the bottom of the housing, and the bottom liquid cooling plate has an external coolant channel. The two ends of the external coolant channel are connected to an inlet and an outlet, respectively. The housing contains non-circulating coolant. The explosion-proof valve on the battery cell module is immersed in the non-circulating coolant. The level of the non-circulating coolant is lower than the top surface of the battery cell module. The immersion liquid-cooled battery pack achieves cooling by exchanging heat between the external circulating coolant flowing in the external coolant channel and the non-circulating coolant inside the casing, thereby transferring the heat generated inside the battery pack.

2. The immersion liquid-cooled battery pack according to claim 1, characterized in that: The explosion-proof valve on the battery cell module is positioned opposite to the bottom of the housing, and the explosion-proof valve is completely submerged in the non-circulating coolant.

3. The immersion liquid-cooled battery pack according to claim 2, characterized in that: The relative arrangement of the explosion-proof valve and the bottom of the enclosure is achieved by inverting the battery cell module and installing it inside the enclosure.

4. The immersion liquid-cooled battery pack according to claim 1, characterized in that: The terminals of the battery cell module are immersed in the non-circulating coolant.

5. The immersion liquid-cooled battery pack according to claim 1, characterized in that: The battery cell modules are spaced apart, and the non-circulating coolant is filled in the gaps between the modules to achieve sufficient cooling of the battery cell modules.

6. The immersion liquid-cooled battery pack according to claim 1, characterized in that: The level of the non-circulating coolant is lower than the top surface of the cell module; the non-circulating coolant occupies 1 / 3 to 2 / 3 of the battery's volume.

7. The immersion liquid-cooled battery pack according to claim 1, characterized in that: The enclosure includes a top cover and a housing that matches the top cover, with a bottom liquid cooling plate at the bottom of the housing.

8. The immersion liquid-cooled battery pack according to claim 1, characterized in that: The enclosure is equipped with a leak indicator light and a liquid level sensor terminal. The immersion liquid-cooled battery pack also includes a liquid level detector, which is connected to the liquid level sensing terminal. The housing is equipped with a pressure relief valve; The immersion liquid-cooled battery pack also includes a busbar and a fuse, and the cell module is connected to the fuse through the busbar; The immersion liquid-cooled battery pack also includes a battery management system, which is connected to the cell module. The module support components include a cell support block and an end plate support block.

9. The immersion liquid-cooled battery pack according to claim 1, characterized in that: The liquid inlet and the liquid outlet are disposed on the bottom liquid cooling plate, and the liquid inlet, the external coolant flow channel and the liquid outlet of the bottom liquid cooling plate constitute the flow channel of the external circulating coolant. The external coolant flow channel is arranged in a serpentine pattern, with adjacent pipes connected in a U-shape. The bottom liquid cooling plate is circulated with external coolant, and the bottom liquid cooling plate is connected to the external circulation system through the liquid inlet and the liquid outlet.

10. An immersion liquid-cooled energy storage battery system, characterized in that: It includes a shelf, a refrigeration unit, an inlet pipe, a return pipe, and multiple submerged liquid-cooled battery packs; one end of the inlet pipe is connected to the outlet of the refrigeration unit, and the other end is connected to the inlet of each submerged liquid-cooled battery pack; the outlet of each submerged liquid-cooled battery pack is connected to the return port of the refrigeration unit through the return pipe; the non-circulating coolant in the submerged liquid-cooled battery pack dissipates heat through indirect heat exchange with the external circulating coolant flowing in the bottom liquid-cooling plate; The immersion liquid-cooled battery pack is the immersion liquid-cooled battery pack according to any one of claims 1-9.

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