Modularized redundant liquid cooling energy storage container

Abstract

The utility model discloses a modularized redundant liquid cooling energy storage container which comprises a container body, the container body comprises a first containing cavity and a second containing cavity, a battery liquid cooling plate is fixedly arranged in the first containing cavity, a liquid cooling unit is fixedly arranged in the second containing cavity, and the liquid cooling unit comprises a chilled water circulation module, a plurality of refrigeration modules and a cooling water circulation module. The refrigeration modules are fixedly connected in parallel through pipelines. The refrigeration module adopts a modular parallel redundancy design, so that the number of the liquid cooling unit modules can be flexibly configured, the requirements of any cooling capacity power section can be met, and the configuration is flexible; the liquid cooling unit is designed through modular redundancy, N + X redundancy or N-1 capacity reduction operation can be achieved, that is, when any one liquid cooling unit module breaks down, other modules can still work independently, the provided refrigerating capacity is enough for cooling the energy storage system, and reliability is high.

Description

Technical Field

[0001] This application relates to the field of liquid cooling unit technology, specifically to a modular redundant liquid-cooled energy storage container. Background Technology

[0002] Lithium-ion battery energy storage systems, as a highly efficient and reliable energy storage technology, have been widely used in renewable energy, electric transportation, and smart grids in recent years. Compared with traditional lead-acid batteries, lithium-ion batteries have higher energy density, longer lifespan, and faster charge and discharge speeds, making them an ideal choice for solving energy storage problems. Against the backdrop of global energy transition and increasingly stringent environmental requirements, the application of lithium-ion battery energy storage systems can not only improve energy utilization efficiency but also promote the widespread access and storage of clean energy.

[0003] To ensure the safety of lithium battery energy storage systems, it is essential to ensure that the lithium batteries always operate within their design range, with 25°C generally considered the optimal operating temperature. If the temperature is too low, the activity of the lithium battery will decrease, leading to a decline in charge and discharge performance; if the temperature is too high, the lithium battery may experience thermal runaway or accelerate battery lifespan degradation. Currently, lithium battery cooling primarily employs two technologies: air cooling (air-cooled units) and liquid cooling (liquid-cooled units). Liquid cooling technology includes plate-type liquid cooling and immersion liquid cooling.

[0004] Air cooling technology uses air as a medium to dissipate heat through forced convection, resulting in a simple and low-cost system. However, it suffers from drawbacks such as low heat exchange efficiency (air's specific heat capacity is only 1 / 4000 that of water), poor temperature uniformity (temperature differences often exceed 10°C), and difficulty in adapting to high-power / high-density scenarios.

[0005] Liquid cooling technology utilizes the high heat capacity of liquids (such as water, ethylene glycol solutions, and fluorinated liquids) to achieve efficient heat dissipation, making it the mainstream solution, especially suitable for energy storage systems of hundreds of megawatts or above, or scenarios with drastic temperature fluctuations. Cold plate liquid cooling involves the coolant flowing through cold plates on the bottom or sides of the battery module for indirect contact heat dissipation. It has low modification costs and strong compatibility, but its heat dissipation efficiency is limited by the cold plate layout, and improper flow channel design can lead to excessively large local temperature differences. Immersion liquid cooling directly submerges the battery in an insulating coolant, resulting in a short heat dissipation path and high temperature uniformity (temperature difference ≤1℃), but it faces challenges such as coolant toxicity (e.g., fluorinated liquids), stringent sealing requirements, and high initial investment.

[0006] In existing technologies, large-scale energy storage liquid cooling units mainly employ centralized cooling (such as...). Figure 1 (as shown) and distributed cooling (such as) Figure 2There are two types (as shown). Centralized liquid cooling units are generally installed at the end of the container, and then the coolant is sent to each liquid-cooled lithium battery pack through the main liquid cooling pipeline and branch pipelines, thereby achieving the cooling of the lithium battery system; distributed cooling units are generally installed at the end or top of the outdoor energy storage cabinet or energy storage container, realizing one liquid cooling unit per cluster of lithium batteries, thereby improving the reliability of the lithium battery cooling system, but the cost is slightly higher.

[0007] In summary, existing liquid cooling units have the following drawbacks:

[0008] (1) Poor flexibility: The cooling power of liquid cooling units for energy storage is generally customized according to the heat generation of the corresponding lithium battery system that needs to be cooled. The models are relatively simple. If the battery model, system design scheme, etc. change, the liquid cooling unit needs to be redesigned.

[0009] (2) Low reliability: If any component of a centralized liquid chiller unit fails, the system needs to be shut down for maintenance, which reduces its reliability.

[0010] (3) Poor maintainability: Any maintenance of any battery cell in a centralized liquid-cooled unit requires system shutdown;

[0011] (4) Poor flow uniformity: Centralized liquid cooling units do not have unit flow control, resulting in uneven flow and large temperature difference in the battery, which further affects battery life and even safety.

[0012] (5) High power consumption: Distributed liquid cooling units consume a lot of power, which affects the efficiency of the entire system. Utility Model Content

[0013] Therefore, this application provides a modular redundant liquid-cooled energy storage container to solve the problems of poor flexibility and low reliability of existing liquid-cooled units.

[0014] To achieve the above objectives, this application provides the following technical solution:

[0015] A modular redundant liquid-cooled energy storage container includes a container body, the container body including a first accommodating cavity and a second accommodating cavity, a battery liquid cooling plate is fixedly installed in the first accommodating cavity, and a liquid cooling unit is fixedly installed in the second accommodating cavity. The liquid cooling unit includes a chilled water circulation module, multiple refrigeration modules and a cooling water circulation module, and the multiple refrigeration modules are fixedly connected in parallel through pipes.

[0016] The input end of the chilled water circulation module is fixedly connected to the output end of the battery liquid cooling plate through a chilled water return pipe. The output end of the chilled water circulation module is fixedly connected to the chilled water return inlet of the refrigeration module through a chilled water return pipe. The chilled water supply outlet of the refrigeration module is fixedly connected to the input end of the battery liquid cooling plate through a chilled water cold water pipe. The cooling water hot water outlet of the refrigeration module is fixedly connected to the input end of the cooling water circulation module through a cooling water hot water pipe. The output end of the cooling water circulation module is fixedly connected to the input end of the battery liquid cooling plate and the cooling water cold water inlet of the refrigeration module through a cooling water inlet pipe.

[0017] Preferably, the chilled water circulation module includes a chilled water circulation pump and a chilled water circulation pump check valve. The input end of the chilled water circulation pump is fixedly connected to the output end of the battery liquid cooling plate through a chilled water return pipe. The output end of the chilled water circulation pump is fixedly connected to the input end of the chilled water circulation pump check valve. The output end of the chilled water circulation pump check valve is fixedly connected to the chilled water return inlet of the refrigeration module through a chilled water return pipe.

[0018] Preferably, the chilled water circulation module further includes a heater, which is fixedly disposed between the chilled water supply outlet of the refrigeration module and the input end of the battery liquid cooling plate.

[0019] Preferably, the chilled water circulation module further includes a return liquid temperature sensor and a return liquid pressure sensor, which are fixedly disposed between the input end of the chilled water circulation pump and the output end of the battery liquid cooling plate.

[0020] Preferably, the refrigeration module includes an evaporator heat exchanger, a variable frequency compressor, a liquid receiver, and a condenser heat exchanger. The chilled water return inlet of the evaporator heat exchanger is fixedly connected to the output end of the chilled water circulation module via a chilled water return pipe. The chilled water supply outlet of the evaporator heat exchanger is fixedly connected to the input end of the battery liquid cooling plate via a chilled water cooling pipe. The refrigerant outlet of the evaporator heat exchanger is fixedly connected to the input end of the variable frequency compressor. The output end of the variable frequency compressor is fixedly connected to the refrigerant inlet of the condenser heat exchanger. The refrigerant outlet of the condenser heat exchanger is fixedly connected to the input end of the liquid receiver. The output end of the liquid receiver is fixedly connected to the refrigerant inlet of the evaporator heat exchanger. The cooling water hot water outlet of the condenser heat exchanger is fixedly connected to the input end of the cooling water circulation module via a cooling water hot water pipe. The cooling water cold water inlet of the condenser heat exchanger is fixedly connected to the output end of the cooling water circulation module.

[0021] Preferably, the refrigeration module further includes a dryer filter, the input end of which is fixedly connected to the output end of the liquid receiver, and the output end of which is fixedly connected to the refrigerant inlet of the evaporator.

[0022] Preferably, the refrigeration module further includes a maintenance valve, which is fixedly disposed between the refrigerant outlet of the condenser and the input end of the liquid receiver.

[0023] Preferably, the refrigeration module further includes a return gas pressure sensor and a return gas temperature sensor, which are fixedly disposed between the evaporator and the variable frequency compressor.

[0024] Preferably, the refrigeration module further includes an exhaust pressure sensor and an exhaust temperature sensor, which are fixedly disposed between the variable frequency compressor and the condenser plate heat exchanger.

[0025] Preferably, the cooling water circulation module includes a natural cooling radiator, a fan, a cooling water circulation pump, and a cooling water circulation pump check valve. The natural cooling radiator and the fan are fixedly installed on the top of the housing. The input end of the natural cooling radiator is fixedly connected to the cooling water hot water outlet of the refrigeration module through a cooling water hot water pipe. The output end of the natural cooling radiator is fixedly connected to the input end of the cooling water circulation pump. The output end of the cooling water circulation pump is fixedly connected to the input end of the cooling water circulation pump check valve. The output end of the cooling water circulation pump check valve is fixedly connected to the input end of the battery liquid cooling plate and the cooling water inlet of the refrigeration module through a cooling water inlet pipe.

[0026] Compared with the prior art, this application has at least the following beneficial effects:

[0027] 1. This application provides a modular redundant liquid-cooled energy storage container, including a container body. The container body includes a first receiving cavity and a second receiving cavity. A battery liquid cooling plate is fixedly installed in the first receiving cavity, and a liquid cooling unit is fixedly installed in the second receiving cavity. The liquid cooling unit includes a chilled water circulation module, multiple refrigeration modules, and a cooling water circulation module. The multiple refrigeration modules are connected in parallel and fixedly via pipes. Because the refrigeration modules adopt a modular parallel redundant design, the number of liquid cooling unit modules can be flexibly configured to meet the needs of any cooling capacity range, offering flexible configuration. Furthermore, the modular redundant design of the liquid cooling unit allows for N+X redundancy or N-1 derating operation, meaning that when any liquid cooling unit module fails, the other modules can still operate independently, providing sufficient cooling capacity to cool the energy storage system, resulting in high reliability.

[0028] 2. Each refrigeration module is equipped with an independent maintenance valve. If any branch of the battery pack has a problem and needs to be shut down for maintenance, simply close the maintenance valve of that branch, which is convenient for maintenance. Attached Figure Description

[0029] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, size ratios, etc. of certain units (components).

[0030] Figure 1 A schematic diagram of an existing centralized liquid-cooled energy storage system;

[0031] Figure 2 A schematic diagram of an existing distributed outdoor cabinet liquid-cooled energy storage system;

[0032] Figure 3 A schematic diagram of a modular redundant liquid-cooled energy storage container structure is provided for this application;

[0033] Figure 4 A front view of a modular redundant liquid-cooled energy storage container provided for this application;

[0034] Figure 5 A partial structural breakdown diagram of a modular redundant liquid-cooled energy storage container provided in this application;

[0035] Figure 6 Enlarged view of a partial structure of a modular redundant liquid-cooled energy storage container provided in this application;

[0036] Figure 7 Right view of a modular redundant liquid-cooled energy storage container provided in this application;

[0037] Figure 8 An enlarged view of the refrigeration module of a modular redundant liquid-cooled energy storage container provided in this application;

[0038] Figure 9 This application provides a schematic diagram of the internal structure connection of a modular redundant liquid-cooled energy storage container.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Housing; 2. Chilled water circulation module; 201. Expansion tank; 202. Chilled water circulation pump; 203. Chilled water circulation pump check valve; 204. Heater; 205. Makeup water tank; 206. Makeup water pump; 207. Makeup water pump check valve; 208. Safety valve; 209. Liquid level switch; 210. Return liquid pressure sensor; 211. Return liquid temperature sensor; 212. Outlet liquid pressure sensor; 213. Outlet liquid temperature sensor; 214. Automatic vent valve; 3. Refrigeration module; 301. Evaporator heat exchanger; 302. Variable frequency compressor; 303. 1. Condenser plate heat exchanger; 304. Liquid receiver; 305. Expansion valve; 306. Low-pressure switch; 307. High-pressure switch; 308. Dryer filter; 309. Return gas pressure sensor; 310. Return gas temperature sensor; 311. Exhaust gas temperature sensor; 312. Exhaust gas pressure sensor; 313. Maintenance valve; 4. Cooling water circulation module; 401. Natural cooling radiator; 402. Fan; 403. Cooling water circulation pump; 404. Cooling water circulation pump check valve; 405. Electric three-way valve; 5. Control cabinet; 6. Manifold cabinet; 7. Fire cabinet. Detailed Implementation

[0041] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," etc., in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "comprising," "including," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).

[0043] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to indicate the general relative positional relationship for the purpose of intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationship in the actual product.

[0044] Please see Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 This application provides a modular redundant liquid-cooled energy storage container, including a container body 1. The container body 1 includes a first accommodating cavity and a second accommodating cavity from left to right. A battery liquid cooling plate is fixedly installed in the first accommodating cavity, and a liquid cooling unit is fixedly installed in the second accommodating cavity. The liquid cooling unit includes a chilled water circulation module 2, multiple refrigeration modules 3 and a cooling water circulation module 4. The multiple refrigeration modules 3 are fixedly connected in parallel through pipes.

[0045] Specifically, the input terminal D1 of the chilled water circulation module 2 is fixedly connected to the output terminal of the battery liquid cooling plate through a chilled water return pipe. The output terminal D2 of the chilled water circulation module 2 is fixedly connected to the chilled water return inlet (referred to as "internal heat inlet") of the refrigeration module 3 through a chilled water return pipe. The chilled water supply outlet D3 (referred to as "internal cold outlet") of the refrigeration module 3 is fixedly connected to the input terminal of the battery liquid cooling plate through a chilled water cold water pipe. The cooling water hot water outlet D4 (referred to as "external heat outlet") of the refrigeration module 3 is fixedly connected to the input terminal of the cooling water circulation module 4 through a cooling water hot water pipe. The output terminal of the cooling water circulation module 4 is fixedly connected to the input terminal of the battery liquid cooling plate and the cooling water cold water inlet (referred to as "external cold inlet") of the refrigeration module 3 through a cooling water inlet pipe.

[0046] Please see Figure 9 The chilled water circulation module 2 includes a chilled water circulation pump 202 and a chilled water circulation pump check valve 203. The input end of the chilled water circulation pump 202 is fixedly connected to the output end of the battery liquid cooling plate through a chilled water return pipe. The output end of the chilled water circulation pump 202 is fixedly connected to the input end of the chilled water circulation pump check valve 203. The output end of the chilled water circulation pump check valve 203 is fixedly connected to the chilled water return inlet of the refrigeration module 3 through a chilled water return pipe.

[0047] Specifically, the chilled water circulation module 2 also includes an expansion tank 201, a heater 204, a water replenishment tank 205, a water replenishment pump 206, a water replenishment pump check valve 207, a safety valve 208, a level switch 209, and an automatic vent valve 214. Among them, the expansion tank 201 is mainly used to alleviate pressure fluctuations caused by temperature changes in the system and ensure stable system operation. The heater 204 is fixedly installed between the chilled water supply outlet of the refrigeration module 3 and the input end of the battery liquid cooling plate. When the ambient temperature is too low, this application can ensure that the lithium battery system operates within the normal range through the heater 204. The water replenishment tank 205 can be used to replenish water lost due to leakage or evaporation, ensuring the stability of water volume in the system.

[0048] Specifically, the chilled water circulation module 2 also includes a return liquid temperature sensor 211, a return liquid pressure sensor 210, an outlet liquid pressure sensor 212, and an outlet liquid temperature sensor 213. The return liquid temperature sensor 211 and the return liquid pressure sensor 210 are fixedly installed between the input end of the chilled water circulation pump 202 and the output end of the battery liquid cooling plate. The outlet liquid temperature sensor 213 and the outlet liquid pressure sensor 212 are fixedly installed between the output end of the chilled water circulation pump check valve 203 and the input end of the battery liquid cooling plate.

[0049] Specifically, the refrigeration module 3 includes an evaporator heat exchanger 301, a variable frequency compressor 302, a liquid receiver 304, and a condenser heat exchanger 303. The chilled water return inlet of the evaporator heat exchanger 301 is fixedly connected to the output end of the chilled water circulation module 2 through a chilled water return pipe. The chilled water supply outlet of the evaporator heat exchanger 301 is fixedly connected to the input end of the battery liquid cooling plate through a chilled water cooling pipe. The refrigerant outlet of the evaporator heat exchanger 301 is fixedly connected to the input end of the variable frequency compressor 302. The output end of the variable frequency compressor 302 is fixedly connected to the refrigerant inlet of the condenser heat exchanger 303. The refrigerant outlet of the condenser heat exchanger 303 is fixedly connected to the input end of the liquid receiver 304. The output end of the liquid receiver 304 is fixedly connected to the refrigerant inlet of the evaporator heat exchanger 301. The cooling water hot water outlet of the condenser heat exchanger 303 is fixedly connected to the input end of the cooling water circulation module 4 through a cooling water hot water pipe. The cooling water cold water inlet of the condenser heat exchanger 303 is fixedly connected to the output end of the cooling water circulation module 4 and the input end of the battery liquid cooling plate.

[0050] Specifically, the refrigeration module 3 also includes an expansion valve 305, a low-pressure switch 306, a high-pressure switch 307, and a dryer filter 308. The input end of the dryer filter 308 is fixedly connected to the output end of the liquid receiver 304, and the output end of the dryer filter 308 is fixedly connected to the refrigerant inlet of the evaporator plate heat exchanger 301.

[0051] Specifically, the refrigeration module 3 also includes a return gas pressure sensor 309, a return gas temperature sensor 310, an exhaust pressure sensor 312, and an exhaust temperature sensor 311. The return gas pressure sensor 309 and the return gas temperature sensor 310 are fixedly installed between the evaporator plate heat exchanger 301 and the variable frequency compressor 302, while the exhaust pressure sensor 312 and the exhaust temperature sensor 311 are fixedly installed between the variable frequency compressor 302 and the condenser plate heat exchanger 303.

[0052] Specifically, the refrigeration module 3 also includes a maintenance valve 313, which is fixedly installed between the refrigerant outlet of the condenser plate heat exchanger 303 and the input end of the liquid receiver 304. The maintenance valve 313 is used to quickly cut off or adjust the flow of fluid when the equipment or piping system malfunctions, so as to carry out repair or maintenance work.

[0053] Specifically, the cooling water circulation module 4 includes a natural cooling radiator 401, a fan 402, a cooling water circulation pump 403, and a cooling water circulation pump check valve 404. The natural cooling radiator 401 and the fan 402 are fixedly installed on the top of the housing 1. The input end of the natural cooling radiator 401 is fixedly connected to the cooling water hot water outlet of the refrigeration module 3 through a cooling water hot water pipe. The output end of the natural cooling radiator 401 is fixedly connected to the input end of the cooling water circulation pump 403. The output end of the cooling water circulation pump 403 is fixedly connected to the input end of the cooling water circulation pump check valve 404. The output end of the cooling water circulation pump check valve 404 is fixedly connected to the input end of the battery liquid cooling plate and the cooling water inlet of the refrigeration module 3 through a cooling water inlet pipe.

[0054] Specifically, the cooling water circulation module 4 also includes an electric three-way valve 405, which can be directly connected to the chilled water circulation module 2 by adjusting the electric three-way valve 405 to achieve natural cooling when the ambient temperature is low.

[0055] Specifically, the modular redundant liquid-cooled energy storage container provided in this application is further equipped with a control cabinet 5 (ACP), a combiner cabinet 6 (BCP, i.e., power combiner cabinet) and a fire cabinet 7 in the third compartment. The control cabinet 5 is used to control the electrical equipment in the entire container, the combiner cabinet 6 is used to distribute the power supply to different load devices, and the fire cabinet 7 is used to store fire-fighting equipment.

[0056] The modular redundant liquid-cooled energy storage container provided in this application has the following advantages:

[0057] (1) Modular design allows for flexible expansion: Modular design enables flexible system expansion and can be flexibly adapted to any power requirement of the application;

[0058] (2) High reliability design: The system can be configured with N+1 redundancy according to the application, or it can be operated with N-1 capacity reduction to improve system reliability;

[0059] (3) Standard configuration of natural cooling system with high system efficiency: natural cooling can share the heat dissipation circuit of dry cooler with the condenser circuit of the compression refrigeration circuit, thereby improving the operating efficiency of the system;

[0060] (4) Short fault repair time: Spare modules can be stored at the application site, and any module can be replaced online if there is a problem;

[0061] (5) Loop decoupling design for easy field use: It can decouple the evaporator side, condenser side and compressor refrigeration circuit, improving the system flexibility; when there is industrial cooling water at the application site, the condenser side circuit and compressor refrigeration circuit do not need to be configured, thereby reducing costs;

[0062] (6) Small size and flexible layout: The main components of the compression refrigeration circuit are only the compressor and two plate heat exchangers. The small size makes it easy to standardize and mass produce. In the energy storage system, the dry cooler can be integrated into the top of the container and placed horizontally. The system hot air blows upward and does not occupy the space of the battery system. The system has a small footprint and flexible layout.

[0063] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A modular redundant liquid-cooled energy storage container, characterized in that, The enclosure includes a first receiving cavity and a second receiving cavity. A battery liquid cooling plate is fixedly installed in the first receiving cavity, and a liquid cooling unit is fixedly installed in the second receiving cavity. The liquid cooling unit includes a chilled water circulation module, multiple refrigeration modules and a cooling water circulation module. The multiple refrigeration modules are fixedly connected in parallel through pipes. The input end of the chilled water circulation module is fixedly connected to the output end of the battery liquid cooling plate through a chilled water return pipe. The output end of the chilled water circulation module is fixedly connected to the chilled water return inlet of the refrigeration module through a chilled water return pipe. The chilled water supply outlet of the refrigeration module is fixedly connected to the input end of the battery liquid cooling plate through a chilled water cold water pipe. The cooling water hot water outlet of the refrigeration module is fixedly connected to the input end of the cooling water circulation module through a cooling water hot water pipe. The output end of the cooling water circulation module is fixedly connected to the input end of the battery liquid cooling plate and the cooling water cold water inlet of the refrigeration module through a cooling water inlet pipe.

2. The modular redundant liquid-cooled energy storage container according to claim 1, characterized in that, The chilled water circulation module includes a chilled water circulation pump and a chilled water circulation pump check valve. The input end of the chilled water circulation pump is fixedly connected to the output end of the battery liquid cooling plate through a chilled water return pipe. The output end of the chilled water circulation pump is fixedly connected to the input end of the chilled water circulation pump check valve. The output end of the chilled water circulation pump check valve is fixedly connected to the chilled water return port of the refrigeration module through a chilled water return pipe.

3. The modular redundant liquid-cooled energy storage container according to claim 2, characterized in that, The chilled water circulation module also includes a heater, which is fixedly disposed between the chilled water supply outlet of the refrigeration module and the input end of the battery liquid cooling plate.

4. The modular redundant liquid-cooled energy storage container according to claim 2, characterized in that, The chilled water circulation module also includes a return liquid temperature sensor and a return liquid pressure sensor, which are fixedly installed between the input end of the chilled water circulation pump and the output end of the battery liquid cooling plate.

5. The modular redundant liquid-cooled energy storage container according to claim 1, characterized in that, The refrigeration module includes an evaporator heat exchanger, a variable frequency compressor, a liquid receiver, and a condenser heat exchanger. The chilled water return inlet of the evaporator heat exchanger is fixedly connected to the output end of the chilled water circulation module via a chilled water return pipe. The chilled water supply outlet of the evaporator heat exchanger is fixedly connected to the input end of the battery liquid cooling plate via a chilled water cooling pipe. The refrigerant outlet of the evaporator heat exchanger is fixedly connected to the input end of the variable frequency compressor. The output end of the variable frequency compressor is fixedly connected to the refrigerant inlet of the condenser heat exchanger. The refrigerant outlet of the condenser heat exchanger is fixedly connected to the input end of the liquid receiver. The output end of the liquid receiver is fixedly connected to the refrigerant inlet of the evaporator heat exchanger. The cooling water hot water outlet of the condenser heat exchanger is fixedly connected to the input end of the cooling water circulation module via a cooling water hot water pipe. The cooling water cold water inlet of the condenser heat exchanger is fixedly connected to the output end of the cooling water circulation module.

6. The modular redundant liquid-cooled energy storage container according to claim 5, characterized in that, The refrigeration module also includes a dryer filter, the input end of which is fixedly connected to the output end of the liquid receiver, and the output end of which is fixedly connected to the refrigerant inlet of the evaporator.

7. The modular redundant liquid-cooled energy storage container according to claim 5, characterized in that, The refrigeration module also includes a maintenance valve, which is fixedly disposed between the refrigerant outlet of the condenser and the input end of the liquid receiver.

8. The modular redundant liquid-cooled energy storage container according to claim 5, characterized in that, The refrigeration module also includes a return gas pressure sensor and a return gas temperature sensor, which are fixedly disposed between the evaporator plate heat exchanger and the variable frequency compressor.

9. The modular redundant liquid-cooled energy storage container according to claim 5, characterized in that, The refrigeration module also includes an exhaust pressure sensor and an exhaust temperature sensor, which are fixedly disposed between the variable frequency compressor and the condenser plate heat exchanger.

10. The modular redundant liquid-cooled energy storage container according to claim 1, characterized in that, The cooling water circulation module includes a natural cooling radiator, a fan, a cooling water circulation pump, and a cooling water circulation pump check valve. The natural cooling radiator and the fan are fixedly installed on the top of the housing. The input end of the natural cooling radiator is fixedly connected to the cooling water hot water outlet of the refrigeration module through a cooling water hot water pipe. The output end of the natural cooling radiator is fixedly connected to the input end of the cooling water circulation pump. The output end of the cooling water circulation pump is fixedly connected to the input end of the cooling water circulation pump check valve. The output end of the cooling water circulation pump check valve is fixedly connected to the input end of the battery liquid cooling plate and the cooling water inlet of the refrigeration module through a cooling water inlet pipe.

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