Immersed liquid cooling energy storage container

Abstract

The invention discloses an immersed liquid cooling energy storage container, which comprises a cluster frame, a liquid cooling system and a battery pack, a battery module is arranged in the battery pack, the liquid cooling system comprises a refrigeration device, a main liquid cooling system and a plurality of sub liquid cooling systems, each sub liquid cooling system is connected in parallel in the main liquid cooling system, each sub liquid cooling system is arranged in each battery pack, and each sub liquid cooling system is connected in parallel in the main liquid cooling system. And the sub liquid cooling system is used for cooling the battery module. The main liquid cooling system and the sub liquid cooling system are designed in parallel, so that independent cooling control of each battery pack is realized, and the temperature adjustment is more accurate; the multi-stage shunting structure (the trunk, the first-stage shunt and the second-stage shunt are transmitted layer by layer) is fully covered, and the liquid cooling medium is more uniformly distributed; and by combining the design of the confluence plate, the branch pipes and the flow guide ribs, the liquid flowing path is optimized, the heat exchange efficiency is improved, and local overheating is avoided.

Description

Technical Field

[0001] The invention relates to an immersed liquid-cooled energy storage container. Background Art

[0002] In recent years, with the continuous development of energy storage technology, the single-cell capacity of energy storage cells has continued to increase. In the process of large-scale integrated use, its working heat has increased significantly. Especially during rate discharge, if the temperature of the cell cannot be timely and effectively controlled and managed, it is very easy to cause thermal runaway, which in turn causes serious safety accidents such as fire or explosion in the energy storage system. Therefore, how to efficiently and safely dissipate heat from energy storage cells has become one of the key issues in the design of energy storage systems.

[0003] At present, the mainstream energy storage systems on the market mostly use forced air cooling or bottom plate liquid cooling for heat dissipation. Forced air cooling has a simple structure, but the temperature difference between different parts of the system is large, generally up to about 7°C, which can easily cause uneven temperature and affect the overall system efficiency. Although the bottom plate liquid cooling has improved the heat dissipation capacity compared to air cooling, its temperature difference is still generally above 5°C, and the temperature uniformity is still insufficient. The temperature consistency of the energy storage system directly affects its overall operating efficiency and safety. The better the temperature uniformity, the more effective it can be in improving system efficiency, and it can also significantly reduce the risk of thermal runaway.

[0004] Some high-end systems have begun to introduce immersion liquid cooling technology, which places a cluster of modules in an oil cylinder and uses an oil pump to circulate cooling liquid to dissipate heat. Although this structure has good temperature uniformity in theory, it has extremely high requirements for system sealing. Any air holes may cause coolant to spray out due to internal pressure, posing a safety hazard. In addition, the oil pump itself not only consumes more electricity during operation, but also generates additional heat, which increases the burden on the liquid cooling system and reduces overall energy efficiency. In terms of maintenance, once a battery cell fails, the coolant needs to be released as a whole, which is a cumbersome and costly maintenance process.

[0005] Another type of system uses an oil pump combined with a plate heat exchange structure, but it also has a number of technical bottlenecks. When the oil pump is running, the internal pressure of the Pack increases, which puts higher requirements on the sealing of the Pack box. At the same time, the system power consumption is large, which is not conducive to energy efficiency optimization.

[0006] Therefore, the existing immersion liquid-cooled energy storage system still faces many technical challenges in terms of structural complexity, sealing, energy consumption and maintenance convenience. It is urgent to propose a new heat dissipation system solution that is more efficient, safe and easy to maintain to meet the heat dissipation management needs of high-capacity energy storage systems. Summary of the invention

[0007] The purpose of the present invention is to solve the above deficiencies in the prior art and provide an immersion liquid-cooled energy storage container.

[0008] An immersion liquid-cooled energy storage container includes a cluster frame, a liquid cooling system, and a battery pack. The battery pack is provided with a battery module. The liquid cooling system includes a refrigeration device, a main liquid cooling system, and a plurality of sub-liquid cooling systems. Each sub-liquid cooling system is connected in parallel to the main liquid cooling system. Each battery pack is provided with a sub-liquid cooling system, and the sub-liquid cooling system is used to cool the battery module.

[0009] Furthermore, the battery pack includes a box cover, a front output plate, and a liquid cooling plate. The box cover is a semi-enclosed shell structure, and its front end face and lower end face are both open. The edges around the open front end face of the box cover are provided with a first inward flange. The front output plate is installed on the inner side of the front end face of the box cover, and the front end face of the front output plate is connected to the rear end face of the first flange. The front output plate is provided with a port for external output and communication. The liquid cooling plate is located at the open part of the lower end face of the box cover, and the edges around the open lower end face of the box cover are provided with a second outward flange. The upper end face of the liquid cooling plate is connected to the lower end face of the second flange. Silicone foam is provided between the front output plate and the first flange, and between the liquid cooling plate and the second flange.

[0010] Furthermore, the lower end surface of the liquid cooling plate is connected to a steel guard plate, and the guard plate covers the entire lower end surface of the liquid cooling plate.

[0011] Furthermore, a placement rack with a buffer structure is provided on both sides of the outside of the battery pack, and the placement rack includes a suspension beam and a hanger, the suspension beam is fixedly connected to the battery pack, the hanger and the suspension beam are detachably connected, a buffer structure is provided between the hanger and the suspension beam, and the placement rack is used to be supported on the cluster rack.

[0012] Furthermore, the hanging beam is a U-shaped structure as a whole, which includes a lower part, a middle part, and an upper part, wherein the lower part is fixedly connected to the bottom of the battery pack, the middle part is fixedly connected to the side of the battery pack, and the upper part is used to be connected to the hanger.

[0013] The hanger is a right-angle bending structure, one bending section of which is connected to the middle part of the hanging beam, and the other bending section is connected to the upper part of the hanging beam. The hanger and the hanging beam are connected by bolts. The buffer structure includes a first pad and a second pad, the second pad is located between the hanger and the hanging beam, and the first pad is located between the bolt head and the hanging beam. The bolt passes through the first pad, the hanging beam, the second pad, and the hanger in sequence.

[0014] Furthermore, the main liquid cooling system includes a junction cabinet, a trunk line and a shunt pipeline, the trunk line includes a return pipeline and a liquid supply pipeline, one end of the return pipeline and the liquid supply pipeline are connected in parallel to the junction cabinet, the refrigeration device is connected to the junction cabinet, the shunt pipeline includes a primary branch and a secondary branch, the return pipeline and the liquid supply pipeline are connected to multiple primary branches, each primary branch is connected to multiple secondary branches, each battery pack is connected to two secondary branches, one secondary branch leads to the return pipeline, and the other secondary branch leads from the liquid supply pipeline.

[0015] Furthermore, the cluster rack includes a battery compartment with a matrix structure, and the battery packs are arranged in horizontal rows and vertical columns in the battery compartment. The return pipe and the liquid supply pipe are arranged horizontally at the bottom of the cluster rack, and several primary branches are led out from the return pipe or the liquid supply pipe and arranged vertically between adjacent battery pack columns; multiple secondary branches extend horizontally from the primary branch to connect with each battery pack.

[0016] Furthermore, the sub-liquid cooling system includes a manifold and multiple branch pipes, the manifold and the branch pipes are each provided with an inner cavity, each branch pipe is communicated with the manifold, the inner cavity of each branch pipe is divided into multiple communicating flow channels, the interconnection between the flow channels in each branch pipe is located at the rear end of the inner cavity of the branch pipe, the inner cavity of the manifold is divided into multiple independent flow paths, the number of flow paths is the same as the number of flow channels, each flow channel is connected to each flow path in a one-to-one correspondence, and the manifold is provided with an inlet and an outlet communicated with its inner cavity.

[0017] Furthermore, the number of flow channels and flow paths are both two, namely, the first flow channel, the second flow channel, the first flow path, and the second flow path. The inlet and the outlet are both connected to the first flow path. A baffle is provided between the inlet and the outlet. The baffle is located in the first flow path. The baffle is used to isolate the inlet from the outlet. The flow channels and flow paths are both structures distributed up and down.

[0018] Furthermore, a plurality of guide ribs are provided on the inner side wall of the flow channel, the coverage area of ​​the guide ribs is smaller than the cross-sectional area of ​​the flow channel, and the guide ribs are arranged at intervals and staggered on the opposite inner side walls of the flow channel.

[0019] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0020] The main liquid cooling system and the sub-liquid cooling system are designed in parallel to achieve independent cooling control of each battery pack and more precise temperature regulation. The multi-stage shunt structure (main line, primary branch, secondary branch, layer by layer) provides comprehensive coverage and more even distribution of the liquid cooling medium. Combined with the design of the manifold, branch pipe, and guide ribs, the liquid flow path is optimized, the heat exchange efficiency is improved, and local overheating is avoided.

[0021] The modular structure of the battery pack (box cover + front output plate + liquid cooling plate) is easy to assemble and disassemble; the front output plate concentrates the power and signal interfaces for easy docking; the hanging beam and hanger structure are detachable, and combined with the buffer structure, the installation is safer and the transportation is more stable.

[0022] The immersion liquid cooling design effectively prevents thermal runaway of the battery and ensures safe operation; the silicone foam sealing structure prevents liquid leakage and external contamination; a baffle is installed inside the sub-liquid cooling system to prevent liquid backflow interference and ensure cooling stability.

[0023] The cluster rack adopts a horizontal and vertical matrix battery compartment layout, which is compactly arranged to improve space utilization; the battery packs can be flexibly increased or decreased, suitable for energy storage needs of different scales, and has strong scalability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the general assembly drawing of the container;

[0025] Figure 2 is a schematic diagram of the battery pack;

[0026] Figure 3 It is a schematic diagram of a hanging beam;

[0027] Figure 4 It is a schematic diagram of the hanger;

[0028] Figure 5 is a schematic diagram of the sub-liquid cooling system;

[0029] Figure 6 is a schematic diagram of a manifold;

[0030] Figure 7 It is a schematic diagram of the branch pipe;

[0031] In the figure, 1, cluster rack, 2, refrigeration device, 3, junction cabinet, 4, return pipeline, 5, liquid supply pipeline, 6, primary branch, 7, secondary branch, 8, battery pack, 9, box cover, 10, front output plate, 11, liquid cooling plate, 12, hanging beam, 13, hanger, 14, first cushion, 15, second cushion, 16, upper part, 17, middle part, 18, lower part, 19, junction plate, 20, branch pipe, 21, inlet, 22, outlet, 23, first flow path, 24, second flow path, 25, baffle, 26, first flow channel, 27, second flow channel, 28, guide ribs. DETAILED DESCRIPTION

[0032] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0033] An immersion liquid-cooled energy storage container includes a cluster frame 1, a liquid cooling system, and a battery pack 8. The battery pack 8 is provided with a battery module. The liquid cooling system includes a refrigeration device 2, a main liquid cooling system, and a plurality of sub-liquid cooling systems. Each sub-liquid cooling system is connected in parallel to the main liquid cooling system. Each battery pack 8 is provided with a sub-liquid cooling system, and the sub-liquid cooling system is used to cool the battery module.

[0034] The liquid cooling system realizes a modular parallel cooling structure by arranging multiple sub-liquid cooling systems in each battery pack 8 and connecting them to the main liquid cooling system. The main liquid cooling system can centrally control the liquid circulation cooling path, cool the circulating coolant through the refrigeration device 2 and then transport it to each sub-liquid cooling system through the liquid supply pipeline 5. The sub-liquid cooling system is arranged close to the battery module, and the flowing coolant absorbs the heat generated by the battery module during operation, realizes rapid heat exchange and returns to the main liquid cooling system through the reflux path for circulation cooling. While achieving efficient heat dissipation of the battery module, this system also improves the thermal control efficiency of the overall energy storage system.

[0035] Compared with the traditional air-cooling structure, this implementation adopts a distributed parallel liquid cooling network to achieve fixed-point efficient thermal management for each battery module group, significantly improves the thermal control response speed and system stability, enhances the system operation safety, and reduces the risk of local overheating.

[0036] In a possible embodiment, the battery pack 8 includes a box cover 9, a front output plate 10, and a liquid cooling plate 11. The box cover 9 is a semi-enclosed shell structure, and its front end face and lower end face are both open. The edges around the open front end face of the box cover 9 are provided with a first inward flange. The front output plate 10 is installed on the inner side of the front end face of the box cover 9, and the front end face of the front output plate 10 is connected to the rear end face of the first flange. The front output plate 10 is provided with a port for external output and communication. The liquid cooling plate 11 is located at the open part of the lower end face of the box cover 9, and the edges around the open lower end face of the box cover 9 are provided with a second outward flange. The upper end face of the liquid cooling plate 11 is connected to the lower end face of the second flange. Silicone foam is provided between the front output plate 10 and the first flange, and between the liquid cooling plate 11 and the second flange.

[0037] This structure makes the battery pack 8 have modular characteristics that are easy to assemble and repair by designing the box cover 9 as a semi-enclosed open structure. The front output plate 10 integrates signal and power output ports for easy standardized connection. The liquid cooling plate 11 is installed close to the bottom of the box, directly assuming the heat conduction path of the battery module, and achieving heat exchange through contact with the coolant. The silicone foam plays a buffering and sealing role, improving the assembly tightness and shock resistance, while enhancing the sealing to prevent liquid leakage or external dust from entering.

[0038] This structural design simplifies the manufacturing and maintenance process of the battery pack 8, improves the structural strength and assembly accuracy, enhances the thermal coupling efficiency between the liquid cooling plate 11 and the battery heat source, ensures a continuous and efficient heat dissipation path, and is suitable for high heat load density application scenarios.

[0039] In a possible implementation, the lower end surface of the liquid cooling plate 11 is connected to a steel guard plate, which covers the entire lower end surface of the liquid cooling plate 11. The connection structure adds a steel guard plate under the liquid cooling plate 11 to provide mechanical strength protection for the liquid cooling plate 11 to prevent physical damage or impact during transportation, installation or operation. At the same time, it can enhance the overall support stiffness of the liquid cooling structure to prevent the liquid cooling plate 11 from deforming due to force and affecting the stability of the fluid channel.

[0040] By adding a guard plate to protect the key structure of the liquid cooling system, the mechanical reliability and environmental adaptability of the equipment can be effectively improved, the service life of the equipment can be extended, and the long-term stability of the cooling function can be ensured.

[0041] In a possible embodiment, a placement rack with a buffer structure is provided on both sides of the outside of the battery pack 8, and the placement rack includes a suspension beam 12 and a hanger 13. The suspension beam 12 is fixedly connected to the battery pack 8, and the hanger 13 is detachably connected to the suspension beam 12. A buffer structure is provided between the hanger 13 and the suspension beam 12, and the placement rack is used to be supported on the cluster rack 1.

[0042] The structure realizes accurate positioning and rapid deployment of the battery pack 8 in the cluster rack 1 by providing a detachable placement rack assembly outside the battery pack 8. The hanging beam 12 plays a structural bearing role, the hanging rack 13 realizes the detachable docking of the module, and the buffer structure buffers the impact and vibration at the connection to reduce structural fatigue.

[0043] It enhances the flexibility and safety of the deployment of battery packs in the energy storage system, and effectively improves the earthquake resistance and protection capabilities during transportation and installation, ensuring stable operation of the system.

[0044] In a possible embodiment, the suspension beam 12 is a U-shaped structure as a whole, including a lower portion 18, a middle portion 17, and an upper portion 16. The lower portion 18 is fixedly connected to the bottom of the battery pack 8, the middle portion 17 is fixedly connected to the side of the battery pack 8, and the upper portion 16 is used to be connected to the hanger 13. The hanger 13 is a right-angle bend structure, one bend section of which is connected to the middle portion 17 of the suspension beam 12, and the other bend section is connected to the upper portion 16 of the suspension beam 12. The hanger 13 and the suspension beam 12 are connected by bolts, and the buffer structure includes a first pad 14 and a second pad 15. The second pad 15 is located between the hanger 13 and the suspension beam 12, and the first pad 14 is located between the bolt head and the suspension beam 12. The bolt passes through the first pad 14, the suspension beam 12, the second pad 15, and the hanger 13 in sequence.

[0045] A stable connection frame is formed by the U-shaped hanging beam 12 and the bent hanger 13. The cushion material is embedded between the contact surface and the fastening point, which absorbs mechanical stress while preventing the fastening components from causing stress concentration on the hanging beam 12 and the hanger 13. This design provides multi-point support and shock absorption capabilities to prevent external forces from being transmitted to the battery body. The structure has strong stability and good impact absorption and stress release capabilities, which can significantly improve the seismic and fall resistance of the energy storage device, and improve the safety and maintenance convenience during loading and unloading and transportation.

[0046] In a possible embodiment, the main liquid cooling system includes a junction cabinet 3, a trunk line and a shunt line, the trunk line includes a return line 4 and a liquid supply line 5, one end of the return line 4 and the liquid supply line 5 are connected in parallel to the junction cabinet 3, the refrigeration device 2 is connected to the junction cabinet 3, the shunt line includes a primary branch 6 and a secondary branch 7, the return line 4 and the liquid supply line 5 are connected to multiple primary branches 6, each primary branch 6 is connected to multiple secondary branches 7, each battery pack 8 is connected to two secondary branches 7, one secondary branch 7 leads to the return line 4, and the other secondary branch 7 is led from the liquid supply line 5.

[0047] The main liquid cooling system constructs a liquid cooling network through a layered pipeline structure. The first-level branch 6 is used to connect the trunk and the local area, and the second-level branch 7 further realizes the distribution and collection of cooling liquid for each battery pack 8, ensuring that each battery pack 8 can dissipate heat independently. The junction cabinet 3 in the system serves as the liquid distribution and collection control center to achieve closed-loop temperature control management. The liquid cooling structure is clear, the distribution is reasonable, the control is flexible, and the cooling path is clear, which is conducive to thermal balance regulation and module expansion, and meets the needs of high-power energy storage.

[0048] In a possible embodiment, the cluster rack 1 includes a battery compartment with a matrix structure, and the battery packs 8 are arranged in the battery compartment in horizontal rows and vertical columns. The return line 4 and the liquid supply line 5 are arranged horizontally at the bottom of the cluster rack 1, and a plurality of primary branches 6 are led out from the return line 4 or the liquid supply line 5 and arranged vertically between adjacent columns of battery packs 8; a plurality of secondary branches 7 extend horizontally from the primary branch 6 to be connected to each battery pack 8.

[0049] This structure establishes a two-dimensional cooling pipeline network by centrally arranging the trunk line at the bottom of the battery compartment, combining the longitudinal primary branch line 6 and the transverse secondary branch line 7, and realizing full coverage thermal control of the battery array area. It enhances the space utilization rate and installation and maintenance convenience of pipeline layout, effectively improves the heat dissipation uniformity and response efficiency, and the structure is easier to standardize design and modularize deployment.

[0050] In a possible embodiment, the sub-liquid cooling system includes a manifold 19 and a plurality of branch pipes 20, wherein the manifold 19 and the branch pipes 20 are both provided with inner cavities, each branch pipe 20 is communicated with the manifold 19, the inner cavity of each branch pipe 20 is divided into a plurality of communicating flow channels, the interconnection between the flow channels in each branch pipe 20 is located at the rear end of the inner cavity of the branch pipe 20, the inner cavity of the manifold 19 is divided into a plurality of independent flow paths, the number of flow paths is the same as the number of flow channels, each flow channel is connected to each flow path in a one-to-one correspondence, and the manifold 19 is provided with an inlet 21 and an outlet 22 communicated with its inner cavity.

[0051] The sub-liquid cooling system adopts a split-parallel-re-collection structure. The manifold 19 divides the main liquid path into multiple independent paths, which are respectively connected to the branch pipes 20, and then extended to different areas of the battery module through the flow channel, so as to refine the cooling path, increase the heat dissipation contact area, and improve the thermal control capability. This design provides a fixed-point heat dissipation path for the position differences of the single battery, so that the coolant flows evenly through each key heat point, greatly improving the heat dissipation efficiency and the system temperature difference control capability.

[0052] In one possible implementation, the number of flow channels and flow paths are both two, namely, the first flow channel 26, the second flow channel 27, the first flow path 23, and the second flow path 24. The inlet 21 and the outlet 22 are both connected to the first flow path 23. A baffle 25 is provided between the inlet 21 and the outlet 22. The baffle 25 is located in the first flow path 23. The baffle 25 is used to isolate the inlet 21 from the outlet 22. The flow channels and flow paths are both structures distributed up and down. The dual flow path structure and the baffle 25 design ensure that the coolant flows in a directional manner along the set path to avoid short-circuit circulation or local dead zones. The upper and lower distribution structure improves space utilization and effectively achieves uniform coverage of the upper and lower battery areas. Improve the accuracy of thermal management and effectively isolate different cooling branches, enhance the efficiency of coolant circulation, and ensure the controllability and consistency of the thermal management process.

[0053] In a possible implementation, a plurality of guide ribs 28 are provided on the inner side wall of the flow channel, the coverage area of ​​the guide ribs 28 is smaller than the cross-sectional area of ​​the flow channel, and the guide ribs 28 are arranged alternately on opposite inner side walls of the flow channel.

[0054] The guide ribs 28 are arranged on the inner wall of the flow channel, which can guide the liquid flow to form a turbulent flow, break the laminar boundary, increase the frequency of heat exchange between the liquid and the wall, and improve the cooling efficiency. The staggered arrangement effectively prevents the liquid flow from forming a dead corner in the channel and promotes the full coverage of the coolant flow. It improves the heat exchange efficiency and coolant utilization rate of the liquid cooling system, improves the local temperature rise problem, and enhances the temperature control response and heat exchange capacity of the entire system.

[0055] Working principle:

[0056] The liquid cooling system is the core thermal control device used to cool the battery module in this energy storage container. It consists of a refrigeration device 2, a main liquid cooling system, and multiple sub-liquid cooling systems. Among them, the sub-liquid cooling system is installed inside each battery pack 8, and is connected to the main liquid cooling system in parallel to form a combined liquid cooling network with centralized cooling and distributed heat dissipation. The liquid cooling system circulates the coolant in the pipeline to take away the heat generated by the battery module during operation, thereby achieving thermal balance inside the entire energy storage system.

[0057] The main liquid cooling system consists of a refrigeration device 2, a junction cabinet 3, a trunk line and a branch line. The refrigeration device 2 is used to cool the coolant and is connected to the junction cabinet 3 to realize the centralized supply and recovery of the coolant.

[0058] The trunk line includes a liquid supply line 5 and a return line 4, one end of which is connected in parallel to the junction cabinet 3, respectively responsible for the delivery and return of the coolant. The branch line includes a primary branch line 6 and a secondary branch line 7. The primary branch line 6 is led out from the trunk line and arranged longitudinally between the battery packs 8. The secondary branch line 7 is led out horizontally from the primary branch line 6 and connected to each battery pack 8 to achieve the distribution and collection of the coolant between the battery packs 8.

[0059] The system forms a closed-loop cooling path, ensuring that the coolant starts from the cooling source, passes through each cooling unit in turn, and then returns to achieve cyclic heat exchange.

[0060] During operation, after the refrigeration device 2 cools the liquid, the coolant flows into the junction cabinet 3 through the liquid supply pipeline 5, and then is distributed to the sub-liquid cooling system of each battery pack 8 through the primary and secondary branches 7 for heat exchange. After the heat is dissipated, the coolant returns to the junction cabinet 3 through the return pipeline 4 to complete the closed-loop circulation. The entire system builds a multi-level distribution and parallel operation cooling network to ensure that the coolant can evenly and efficiently cover each battery pack 8, and adjust the flow and temperature in real time to achieve precise thermal management.

[0061] The sub-liquid cooling system is mainly composed of a manifold 19 and a plurality of branch pipes 20. A plurality of independent flow paths are arranged inside the manifold 19, and each flow path is connected to a branch pipe 20. The inner cavity of each branch pipe 20 is divided into two mutually connected flow channels, and the two flow channels are mutually connected at the end of the branch pipe 20.

[0062] During operation, the coolant enters the first flow path 23 of one side of the baffle 25 from the inlet 21, then enters the first flow channel 26 of the branch pipe 20, flows to the end of the branch pipe 20, enters the second flow channel 27 of these branch pipes 20, and then enters the second flow path 24 of the manifold 19 from the second flow channel 27. Since the second flow path 24 is a connecting structure, the coolant enters the second flow channel 27 of the branch pipe 20 on the other side of the baffle 25 through the flow path. As the coolant gradually increases, the water level gradually rises, the coolant enters the first flow channel 26 of the other branch pipe 20, then enters the first flow path 23 of the other side of the baffle 25, and finally is discharged from the outlet 22, completing a cycle.

[0063] This structure ensures that the coolant forms a closed flow path around the battery module, and improves the heat exchange efficiency through the flow diversion design inside the flow channel, thereby achieving effective cooling of the battery module.

[0064] 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, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An immersion liquid-cooled energy storage container, characterized in that: It includes a cluster frame, a liquid cooling system, and a battery pack. The battery pack is provided with a battery module. The liquid cooling system includes a refrigeration device, a main liquid cooling system, and a plurality of sub-liquid cooling systems. Each sub-liquid cooling system is connected in parallel to the main liquid cooling system. Each battery pack is provided with a sub-liquid cooling system, and the sub-liquid cooling system is used to cool the battery module.

2. The liquid-cooled energy storage container according to claim 1, characterized in that: The battery pack includes a box cover, a front output plate, and a liquid cooling plate. The box cover is a semi-enclosed shell structure, and its front end face and lower end face are both open. The edges around the open front end face of the box cover are provided with a first inward flange. The front output plate is installed on the inner side of the front end face of the box cover, and the front end face of the front output plate is connected to the rear end face of the first flange. The front output plate is provided with a port for external output and communication. The liquid cooling plate is located at the open portion of the lower end face of the box cover, and the edges around the open lower end face of the box cover are provided with a second outward flange. The upper end face of the liquid cooling plate is connected to the lower end face of the second flange. Silicone foam is provided between the front output plate and the first flange, and between the liquid cooling plate and the second flange.

3. The liquid-cooled energy storage container according to claim 2, characterized in that: The lower end surface of the liquid cooling plate is connected to a steel guard plate, and the guard plate covers the entire lower end surface of the liquid cooling plate.

4. The liquid-cooled energy storage container according to any one of claims 1 to 3, characterized in that: A placement rack with a buffer structure is provided on both sides of the outside of the battery pack. The placement rack includes a suspension beam and a hanger. The suspension beam is fixedly connected to the battery pack, and the hanger is detachably connected to the suspension beam. A buffer structure is provided between the hanger and the suspension beam. The placement rack is used to be supported on the cluster rack.

5. The liquid-cooled energy storage container according to claim 4, characterized in that: The hanging beam is a U-shaped structure as a whole, which includes a lower part, a middle part and an upper part. The lower part is fixedly connected to the bottom of the battery pack, the middle part is fixedly connected to the side of the battery pack, and the upper part is used to connect to the hanger. The hanger is a right-angle bending structure, one bending section of which is connected to the middle part of the hanging beam, and the other bending section is connected to the upper part of the hanging beam. The hanger and the hanging beam are connected by bolts. The buffer structure includes a first pad and a second pad, the second pad is located between the hanger and the hanging beam, and the first pad is located between the bolt head and the hanging beam. The bolt passes through the first pad, the hanging beam, the second pad, and the hanger in sequence.

6. The liquid-cooled energy storage container according to claim 1, characterized in that: The main liquid cooling system includes a junction cabinet, a trunk line and a shunt pipeline. The trunk line includes a return pipeline and a liquid supply pipeline. One end of the return pipeline and the liquid supply pipeline are connected in parallel to the junction cabinet. The refrigeration device is connected to the junction cabinet. The shunt pipeline includes a primary branch and a secondary branch. The return pipeline and the liquid supply pipeline are connected to multiple primary branches, each primary branch is connected to multiple secondary branches, and each battery pack is connected to two secondary branches, one secondary branch leads to the return pipeline, and the other secondary branch leads from the liquid supply pipeline.

7. The liquid-cooled energy storage container according to claim 6, characterized in that: The cluster rack includes a battery compartment with a matrix structure, and the battery packs are arranged in horizontal rows and vertical columns in the battery compartment. The return pipeline and the liquid supply pipeline are arranged horizontally at the bottom of the cluster rack. Several primary branches are led out from the return pipeline or the liquid supply pipeline and arranged vertically between adjacent battery pack columns; multiple secondary branches extend horizontally from the primary branch to connect with each battery pack.

8. The liquid-cooled energy storage container according to claim 1, characterized in that: The sub-liquid cooling system includes a manifold and multiple branch pipes. The manifold and the branch pipes are both provided with inner cavities. Each branch pipe is communicated with the manifold. The inner cavity of each branch pipe is divided into multiple communicating flow channels. The interconnection between the flow channels in each branch pipe is located at the rear end of the inner cavity of the branch pipe. The inner cavity of the manifold is divided into multiple independent flow paths. The number of flow paths is the same as the number of flow channels. Each flow channel is connected to each other one by one. The manifold is provided with an inlet and an outlet communicated with its inner cavity.

9. The liquid-cooled energy storage container according to claim 8, characterized in that: The number of flow channels and flow paths are both two, namely the first flow channel, the second flow channel, the first flow path, and the second flow path. The inlet and the outlet are both connected to the first flow path. A baffle is provided between the inlet and the outlet. The baffle is located in the first flow path. The baffle is used to isolate the inlet from the outlet. The flow channels and flow paths are both structures distributed up and down.

10. The liquid-cooled energy storage container according to claim 9, characterized in that: A plurality of guide ribs are arranged on the inner side wall of the flow channel, the coverage area of ​​the guide ribs is smaller than the cross-sectional area of ​​the flow channel, and the guide ribs are arranged alternately on the opposite inner side walls of the flow channel.

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