Immersed liquid cooling energy storage system

Abstract

The utility model belongs to the technical field of energy storage systems, and discloses an immersed liquid cooling energy storage system which comprises a plurality of liquid storage tanks and battery modules, each liquid storage tank comprises a tank body, cooling liquid is contained in the tank body, and a spraying assembly and a liquid discharging assembly are symmetrically arranged on the upper side and the lower side in the tank body; the spraying assembly and the liquid discharging assembly each comprise an installation head, the installation heads are fixed to the front face of the box body and connected with a flow guide frame through connecting pipes, and through holes are linearly distributed in the bottom or the top of the flow guide frame at equal intervals. According to the utility model, the spraying assembly and the liquid discharging assembly realize uniform distribution of cooling liquid through the flow guide frame, and the cooling liquid can be sprayed onto the battery module in a more uniform manner through the through holes which are linearly distributed at equal intervals in the bottom or the top of the flow guide frame, so that each battery can be in full contact with the cooling liquid, and the heat dissipation effect is effectively improved; and the problems of battery performance difference and shortened service life caused by non-uniform distribution of the cooling liquid are avoided.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage system technology, specifically relating to an immersion liquid-cooled energy storage system. Background Technology

[0002] With the continuous development of lithium battery technology, the safety of energy storage systems is receiving increasing attention. Currently, energy storage systems are developing towards continuously improving energy density and power density. However, the increase in power density leads to greater heat generation and power consumption of the battery cells. If the temperature of the battery cells cannot be effectively controlled in a timely manner, it may cause thermal runaway, resulting in fire or even explosion.

[0003] Most existing lithium battery energy storage systems employ air cooling and cold plate liquid cooling for heat dissipation. However, neither of these methods can completely solve the problems of cell temperature uniformity and thermal runaway. For example, CN221304781U discloses an immersion liquid-cooled battery energy storage system that fills the battery pack with coolant and incorporates a cooling unit to regulate the coolant temperature and flow rate, as well as a breather valve to regulate the pressure balance within the system. This achieves comprehensive cooling of the battery pack, ensuring effective heat dissipation, improving heat dissipation efficiency, and enhancing the safety and reliability of the energy storage system. However, existing technologies suffer from uneven coolant distribution. Some batteries do not fully contact the coolant, resulting in poor heat dissipation, while others are wasted due to excessive coolant, affecting the overall performance and lifespan of the battery module and reducing the reliability and safety of the energy storage system. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides an immersion liquid-cooled energy storage system, which aims to solve to some extent the problem of uneven coolant distribution in the prior art. This results in some batteries not being able to fully contact the coolant, leading to poor heat dissipation, while other batteries suffer from waste due to excessive coolant, affecting the overall performance and lifespan of the battery module and reducing the reliability and safety of the energy storage system.

[0005] The technical solution of this utility model is as follows: an immersion liquid-cooled energy storage system, including multiple liquid storage tanks and battery modules. Each liquid storage tank includes a tank body, and the tank body is filled with coolant. Spraying components and draining components are symmetrically arranged on the upper and lower sides of the tank body. Both the spraying components and the draining components include mounting heads. The mounting heads are fixed to the front of the tank body and connected to a guide frame through a connecting pipe. The bottom or top of the guide frame has through holes distributed linearly at equal intervals.

[0006] The battery module is at least partially submerged in the coolant in the housing.

[0007] In some embodiments, the system further includes a housing with an interior receiving slot for housing a refrigeration unit.

[0008] In some embodiments, the plurality of liquid storage tanks are installed inside the receiving tank on the side away from the refrigeration unit.

[0009] In some embodiments, the refrigeration unit is equipped with a liquid inlet pipe at its drain end, and the drain end of the liquid inlet pipe is connected to the liquid inlet end of the storage tank.

[0010] In some embodiments, the liquid inlet pipeline includes a main liquid inlet pipe, the liquid inlet end of which is connected to the liquid outlet end of the refrigeration unit. Multiple liquid inlet branch pipes are connected to the main liquid inlet pipe via a T-joint. The liquid outlet end of each liquid inlet branch pipe is equipped with a liquid inlet connector, which is mounted on the mounting head of the spray assembly.

[0011] In some embodiments, the liquid outlet of the liquid storage tank is connected to a liquid outlet pipe, and the liquid outlet of the liquid outlet pipe is connected to the liquid inlet of the refrigeration unit.

[0012] In some embodiments, the liquid outlet pipeline includes a main liquid outlet pipe, the drain end of which is connected to the liquid inlet of the refrigeration unit. Multiple branch liquid outlet pipes are connected to the main liquid outlet pipe via a tee connector. A liquid outlet connector is installed at the liquid inlet of each branch liquid outlet pipe and is connected to the mounting head of the drain assembly.

[0013] In some embodiments, cabinet doors are hinged to both sides of the front of the housing, and the cabinet doors are provided with heat dissipation slots, control panels and battery management units; the battery management unit is electrically connected to the control panel, the refrigeration unit and the battery module.

[0014] In some embodiments, a dustproof mesh is fixedly connected inside the heat dissipation groove.

[0015] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0016] This application symmetrically arranges spraying and draining components on the upper and lower sides of the liquid storage tank. Both the spraying and draining components achieve uniform distribution of coolant through a guide frame. The guide frame has linearly and equidistantly distributed through holes at the bottom or top, which allows the coolant to be sprayed onto the battery module in a more uniform manner, ensuring that each battery can fully contact the coolant, effectively improving the heat dissipation effect and avoiding the problems of battery performance differences and shortened lifespan caused by uneven coolant distribution. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a partial structural diagram of the present invention;

[0020] Figure 3 This is a front view of the structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the liquid storage tank and battery module structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the spraying component structure of this utility model.

[0023] In the attached image:

[0024] 1. Housing; 11. Cabinet door; 12. Heat dissipation channel; 13. Control panel;

[0025] 2. Refrigeration unit;

[0026] 3. Storage tank; 31. Tank body; 32. Spraying assembly; 33. Drainage assembly; 321. Mounting head; 322. Connecting pipe; 323. Flow guide frame;

[0027] 4. Liquid inlet pipeline; 41. Main liquid inlet pipe; 42. T-connector 1; 43. Branch liquid inlet pipe; 44. Liquid inlet connector;

[0028] 5. Liquid outlet pipeline; 51. Main liquid outlet pipe; 52. T-connector II; 53. Branch liquid outlet pipe; 54. Liquid outlet connector;

[0029] 6. Battery module. Detailed Implementation

[0030] The technical solutions of the embodiments of this application 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 this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0031] Please see Figure 1-5An immersion liquid-cooled energy storage system includes multiple liquid storage tanks 3 and battery modules 6. Each liquid storage tank 3 includes a tank body 31, which is filled with coolant. Spraying components 32 and draining components 33 are symmetrically arranged on the upper and lower sides of the tank body 31. Both the spraying components 32 and the draining components 33 include mounting heads 321, which are fixed to the front of the tank body 31 and connected to a guide frame 323 through a connecting pipe 322. The guide frame 323 has through holes linearly and equidistantly distributed at its bottom or top. The battery modules 6 are at least partially immersed in the coolant in the tank body 31. This application symmetrically arranges a spraying component 32 and a draining component 33 on the upper and lower sides of the liquid storage tank 3. Both the spraying component 32 and the draining component 33 achieve uniform distribution of coolant through a guide frame 323. The guide frame 323 has linearly and equidistantly distributed through holes at the bottom or top, which enables the coolant to be sprayed onto the battery module 6 in a more uniform manner, ensuring that each battery can fully contact the coolant, effectively improving the heat dissipation effect and avoiding the problems of battery performance differences and shortened lifespan caused by uneven coolant distribution.

[0032] In some embodiments, the system further includes a housing 1, which provides sound and heat insulation to reduce the noise generated by the refrigeration unit 2 during operation and its impact on the surrounding environment. The housing 1 has an internal receiving tank, inside which the refrigeration unit 2 is installed. The refrigeration unit 2 cools the circulating coolant, ensuring it can continuously and effectively remove the heat generated by the battery module 6. The refrigeration unit 2 lowers the coolant temperature to a set value through refrigeration cycles of compression, condensation, throttling, and evaporation, thereby maintaining the coolant's cooling performance.

[0033] In some embodiments, multiple liquid storage tanks 3 are installed inside the receiving tank on the side away from the refrigeration unit 2. The refrigeration unit 2 generates a certain amount of heat during operation. Installing the liquid storage tanks 3 on the side away from the refrigeration unit 2 can reduce the impact of the heat generated by the refrigeration unit 2 during operation on the temperature of the coolant in the liquid storage tanks 3.

[0034] In some embodiments, the refrigeration unit 2 is equipped with a liquid inlet pipe 4 at its drain end, and the drain end of the liquid inlet pipe 4 is connected to the liquid inlet end of the liquid storage tank 3.

[0035] In some embodiments, the liquid inlet pipeline 4 includes a main liquid inlet pipe 41, the liquid inlet end of which is connected to the liquid outlet end of the refrigeration unit 2. The main liquid inlet pipe 41 is connected to a plurality of liquid inlet branch pipes 43 via a three-way connector 42. The liquid outlet end of the liquid inlet branch pipe 43 is equipped with a liquid inlet connector 44, which is installed on the mounting head 321 of the spray assembly 32.

[0036] In some embodiments, the liquid outlet of the liquid storage tank 3 is connected to the liquid outlet pipe 5, and the liquid outlet of the liquid outlet pipe 5 is connected to the liquid inlet of the refrigeration unit 2.

[0037] In some embodiments, the liquid outlet pipeline 5 includes a main liquid outlet pipe 51, the liquid outlet end of which is connected to the liquid inlet end of the refrigeration unit 2. The main liquid outlet pipe 51 is connected to a plurality of liquid outlet branch pipes 53 via a three-way connector 52. The liquid outlet end of the liquid outlet branch pipe 53 is equipped with a liquid outlet connector 54, which is connected to the mounting head 321 of the liquid outlet assembly 33.

[0038] By setting up the inlet pipe 4 and the outlet pipe 5, the coolant is effectively circulated between the refrigeration unit 2 and the storage tank 3. The refrigeration unit 2 delivers the cooled coolant to the storage tank 3 through the inlet pipe 4 to provide continuous cooling for the battery module 6.

[0039] During the cooling process, the battery module 6 transfers heat to the coolant, causing the coolant temperature to rise. The heated coolant is then transported back to the refrigeration unit 2 through the outlet pipe 5. The refrigeration unit 2 cools the coolant and then transports it back to the storage tank 3, forming a complete cooling cycle.

[0040] In some embodiments, cabinet doors 11 are hinged to both sides of the front of the housing 1. Each cabinet door 11 has a heat dissipation slot 12, a control panel 13, and a battery management unit. The battery management unit is electrically connected to the control panel 13, the cooling unit 2, and the battery module 6. The control panel 13 allows operators to easily monitor and operate the energy storage system, and to understand the system's operating status and parameters in real time. The battery management unit can monitor battery parameters such as voltage, current, and temperature in real time, and automatically adjust charging and discharging strategies according to the battery's state, improving battery efficiency and lifespan, while also helping to ensure the safety and reliability of the energy storage system.

[0041] In some embodiments, a dustproof net is fixedly connected inside the heat dissipation slot 12, which can effectively prevent dust, debris and other objects from entering the interior of the housing 1.

[0042] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An immersion liquid-cooled energy storage system, characterized in that, include: Multiple liquid storage tanks (3), each liquid storage tank (3) includes a tank body (31), the tank body (31) contains coolant, and spraying components (32) and draining components (33) are symmetrically arranged on the upper and lower sides of the tank body (31); the spraying components (32) and draining components (33) each include a mounting head (321), the mounting head (321) is fixed to the front of the tank body (31), and is connected to a guide frame (323) through a connecting pipe (322), the bottom or top of the guide frame (323) has through holes distributed linearly at equal intervals; Battery module (6), which is at least partially immersed in the coolant of the housing (31).

2. The submerged liquid-cooled energy storage system of claim 1, wherein, The system also includes a housing (1), the interior of which is provided with a receiving groove, and a refrigeration unit (2) is installed inside the receiving groove.

3. The submerged liquid-cooled energy storage system of claim 1, wherein, The plurality of liquid storage tanks (3) are installed inside the receiving tank on the side away from the refrigeration unit (2).

4. The submerged liquid-cooled energy storage system of claim 2, wherein, The refrigeration unit (2) is equipped with a liquid inlet pipe (4) at its drain end, and the drain end of the liquid inlet pipe (4) is connected to the liquid inlet end of the liquid storage tank (3).

5. The submerged liquid-cooled energy storage system of claim 4, wherein, The liquid inlet pipeline (4) includes a main liquid inlet pipe (41), the liquid inlet end of which is connected to the liquid outlet end of the refrigeration unit (2). Multiple liquid inlet branch pipes (43) are connected to the main liquid inlet pipe (41) via a three-way connector (42). A liquid inlet connector (44) is installed at the liquid outlet end of the liquid inlet branch pipe (43). The liquid inlet connector (44) is installed on the mounting head (321) of the spray assembly (32).

6. The submerged liquid-cooled energy storage system of claim 5, wherein, The liquid outlet of the liquid storage tank (3) is connected to the liquid outlet pipe (5), and the liquid outlet of the liquid outlet pipe (5) is connected to the liquid inlet of the refrigeration unit (2).

7. The submerged liquid-cooled energy storage system of claim 6, wherein, The liquid outlet pipeline (5) includes a main liquid outlet pipe (51), the liquid outlet end of which is connected to the liquid inlet end of the refrigeration unit (2). Multiple liquid outlet branch pipes (53) are connected to the main liquid outlet pipe (51) through a three-way connector (52). The liquid outlet branch pipe (53) is equipped with a liquid outlet connector (54) at the liquid inlet end. The liquid outlet connector (54) is connected to the mounting head (321) of the liquid drain assembly (33).

8. The submerged liquid-cooled energy storage system of claim 7, wherein, The housing (1) has cabinet doors (11) hinged on both sides of the front side. The cabinet doors (11) are provided with heat dissipation slots (12), control panels (13) and battery management units. The battery management units are electrically connected to the control panels (13), the refrigeration unit (2) and the battery module (6).

9. The submerged liquid-cooled energy storage system of claim 8, wherein, A dustproof net is fixedly connected inside the heat dissipation groove (12).

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