A heat dissipation system for energy storage cabinets

Abstract

This utility model relates to the field of energy storage cabinet heat dissipation technology, and more particularly to an energy storage cabinet heat dissipation system, comprising: a cabinet body, with a battery chamber and a liquid cooling chamber inside; the battery chamber is equipped with a temperature sensor and a first liquid cooling plate; the liquid cooling chamber is equipped with a liquid cooling unit; the liquid cooling unit includes an inlet pipe, both the temperature sensor and the inlet pipe are connected to a circulating pump, the circulating pump is connected to a radiator through a first regulating valve, the circulating pump is connected to a heat exchanger through a second regulating valve, the radiator is connected to a cooler and a heat exchanger respectively, the cooler is connected to a cooling fan, the heat exchanger is connected to a heater and a gas-liquid separator respectively, the heater is connected to the first liquid cooling plate through an outlet pipe, and both the cooler and the gas-liquid separator are connected to an air compressor. This utility model's energy storage cabinet heat dissipation system can more quickly and effectively remove heat from the energy storage battery, ensuring that the battery can operate at a suitable temperature, improving battery performance and lifespan.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology for energy storage cabinets, and in particular to a heat dissipation system for energy storage cabinets. Background Technology

[0002] Currently, energy storage cabinets have a wide range of applications. They can be used for grid peak shaving and load balancing, in conjunction with solar and wind power renewable energy sources to address the intermittency and instability of renewable energy generation, and to improve power quality in industrial production or for household power supply. The conventional heat dissipation solution for energy storage cabinets is air cooling. Airflow removes heat from the cabinet by installing fans and designing air ducts to allow cool air to enter and hot air to exit, thus lowering the temperature inside the cabinet. For example, Chinese utility model patent application number CN202323143532.4, entitled "An Air-Cooled Heat Dissipation Structure for an Energy Storage Cabinet," illustrates this. Common air-cooling methods include placing air inlets at the bottom or side of the cabinet, close to the heat source components, and air outlets at the top or side, creating convection between the inlets and outlets. Fan control is achieved by installing temperature sensors inside the cabinet to monitor the temperature in real time. When the temperature reaches the upper limit of the set value, the fan starts; when the temperature falls below the lower limit, the fan stops. The disadvantages of this method are: (1) The efficiency of the air-cooled heat dissipation system is relatively low. Air cooling mainly relies on the natural convection of air or the forced convection of the fan to remove heat. The thermal conductivity of air is low, so the heat dissipation speed and efficiency are limited. When the energy storage system is operating at high power and generating a lot of heat, the heat dissipation efficiency will be relatively low. (2) The temperature uniformity is poor. In the air-cooled system, the air flow is easily affected by the internal structure and component layout of the energy storage cabinet, resulting in differences in the heat dissipation effect of different parts, which makes the temperature distribution inside the energy storage cabinet uneven. This may affect the consistency and service life of components such as energy storage batteries. (3) In order to achieve a better heat dissipation effect, the air-cooled system usually needs to be equipped with a fan. The fan will generate noise when it is running. This may become a problem in places with high noise requirements, such as residential areas and office areas. (4) The maintenance cost is high. The fans and other components in the air-cooled system are vulnerable parts. After long-term operation, they may fail and need to be maintained and replaced regularly, which increases the maintenance cost and downtime of the energy storage system. At the same time, the air filter also needs to be cleaned or replaced regularly to prevent dust and other impurities from entering the energy storage cabinet and affecting the heat dissipation effect and equipment performance. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a heat dissipation system for an energy storage cabinet that can be temperature regulated and continuously dissipate heat.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an energy storage cabinet heat dissipation system, comprising:

[0005] The cabinet has a battery compartment and a liquid cooling compartment inside. The battery compartment is equipped with a temperature sensor and a first liquid cooling plate, and the liquid cooling compartment is equipped with a liquid cooling unit.

[0006] The liquid cooling unit includes an inlet pipe, a temperature sensor, and the inlet pipe is connected to a circulating pump. The circulating pump is connected to a radiator through a first regulating valve and to a heat exchanger through a second regulating valve. The radiator is connected to both a cooler and a heat exchanger. The cooler is connected to a cooling fan. The heat exchanger is connected to both a heater and a gas-liquid separator. The heater is connected to a first liquid cooling plate through an outlet pipe. Both the cooler and the gas-liquid separator are connected to an air compressor.

[0007] Furthermore, the liquid cooling unit also includes a coolant filling pipe, which is connected to a circulating pump.

[0008] Furthermore, the battery cavity houses a battery pack, and a first liquid cooling plate is arranged around the battery pack.

[0009] Furthermore, a partition is provided between the battery cavity and the liquid cooling cavity.

[0010] Furthermore, the cabinet's interior is divided into a battery chamber, a liquid cooling chamber, and a third chamber by partitions. The third chamber houses the PCS assembly, and its side walls have heat dissipation channels.

[0011] Furthermore, the cabinet's interior is divided into a battery chamber, a liquid cooling chamber, a third chamber, and a fourth chamber by partitions. The fourth chamber houses a high-voltage box, an energy storage management module, a cabinet-type perfluorohexanone fire extinguishing device, and a UPS.

[0012] Furthermore, the fourth chamber is equipped with a second liquid cooling plate, and the heater is connected to the second liquid cooling plate through another liquid outlet pipe.

[0013] Furthermore, a second liquid cooling plate is arranged around the high-pressure box.

[0014] Furthermore, the sidewalls of the battery cavity are provided with a heat insulation layer.

[0015] Furthermore, the exhaust vent of the liquid cooling chamber is equipped with a sealed heat-insulating baffle.

[0016] The beneficial effects of this utility model are as follows: An energy storage cabinet heat dissipation system uses a liquid cooling control system to connect the energy storage device to the liquid cooling system, utilizing a highly thermally conductive liquid as the heat transfer medium. During operation, the heat generated by the energy storage device is conducted to the coolant through liquid cooling plates. The coolant circulates within the liquid cooling system, carrying the heat to a plate heat exchanger or other heat dissipation equipment for cooling. The cooled coolant is then returned to the energy storage device for further circulation via a pump, thus achieving continuous heat dissipation and temperature control for the energy storage device. The advantages are: compared to air-cooled systems, liquids have a higher specific heat capacity, absorbing more heat and more quickly and effectively removing heat from the energy storage battery, ensuring the battery operates at a suitable temperature and improving battery performance and lifespan. When cooling the battery, the liquid cooling system uses liquid cooling pipes to ensure more uniform cooling, avoiding localized overheating and improving the consistency of the battery pack. Compared to air-cooled systems, the liquid cooling system operates more quietly with lower noise. The heat dissipation structure of the liquid cooling system is relatively compact, saving installation space for the energy storage cabinet and improving space utilization. Liquid cooling systems have relatively low maintenance costs, as they do not require frequent replacement of easily damaged parts such as fans. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the heat dissipation system for the energy storage cabinet.

[0018] Figure 2 Another structural schematic diagram of the energy storage cabinet's heat dissipation system;

[0019] Label Explanation:

[0020] 1. Cabinet; 11. Battery compartment; 12. Liquid cooling compartment; 13. Third compartment; 14. Fourth compartment. Detailed Implementation

[0021] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0022] Please refer to Figures 1 to 2 As shown, the present invention provides a heat dissipation system for an energy storage cabinet, comprising:

[0023] Cabinet 1 has a battery compartment 11 and a liquid cooling compartment 12 inside. The battery compartment 11 is equipped with a temperature sensor and a first liquid cooling plate, and the liquid cooling compartment 12 is equipped with a liquid cooling unit.

[0024] The liquid cooling unit includes an inlet pipe, a temperature sensor, and the inlet pipe is connected to a circulating pump. The circulating pump is connected to a radiator through a first regulating valve and to a heat exchanger through a second regulating valve. The radiator is connected to both a cooler and a heat exchanger. The cooler is connected to a cooling fan. The heat exchanger is connected to both a heater and a gas-liquid separator. The heater is connected to a first liquid cooling plate through an outlet pipe. Both the cooler and the gas-liquid separator are connected to an air compressor.

[0025] As described above, the beneficial effects of this utility model are as follows: An energy storage cabinet heat dissipation system uses a liquid cooling control system to connect the energy storage device to the liquid cooling system, utilizing a highly thermally conductive liquid as the heat transfer medium. During operation, the heat generated by the energy storage device is conducted to the coolant through liquid cooling plates. The coolant circulates within the liquid cooling system, carrying the heat to a plate heat exchanger or other heat dissipation equipment for cooling. The cooled coolant is then returned to the energy storage device for further circulation via a pump, thus achieving continuous heat dissipation and temperature control for the energy storage device. The advantages are: compared to air-cooled systems, liquids have a higher specific heat capacity, absorbing more heat and more quickly and effectively removing heat from the energy storage battery, ensuring the battery operates at a suitable temperature and improving battery performance and lifespan. When cooling the battery, the liquid cooling system uses liquid cooling pipes to ensure more uniform cooling, avoiding localized overheating and improving the consistency of the battery pack. Compared to air-cooled systems, the liquid cooling system operates more quietly with lower noise. The heat dissipation structure of the liquid cooling system is relatively compact, saving installation space for the energy storage cabinet and improving space utilization. Liquid cooling systems have relatively low maintenance costs, as they do not require frequent replacement of easily damaged parts such as fans.

[0026] In an optional embodiment, the liquid-cooled unit further includes a coolant filling pipe connected to a circulating pump.

[0027] As can be seen from the above description, the coolant filling pipe is used to fill coolant, which is a liquid with high thermal conductivity as the heat transfer medium.

[0028] In an optional embodiment, the battery cavity 11 is provided with a battery pack, and a first liquid cooling plate is arranged around the battery pack.

[0029] In an optional embodiment, a partition is provided between the battery cavity 11 and the liquid cooling cavity 12.

[0030] As can be seen from the above description, the partition serves to separate and insulate.

[0031] In an optional embodiment, the inner cavity of the cabinet 1 is divided into a battery cavity 11, a liquid cooling cavity 12 and a third cavity 13 by a partition. The third cavity 13 is equipped with a PCS assembly, and the side wall of the third cavity 13 is provided with a heat dissipation channel.

[0032] In an optional embodiment, the inner cavity of the cabinet 1 is divided by a partition into a battery chamber 11, a liquid cooling chamber 12, a third chamber 13, and a fourth chamber 14. The fourth chamber 14 is equipped with a high-voltage box, an energy storage management module, a cabinet-type perfluorohexanone fire extinguishing device, and a UPS.

[0033] In an optional embodiment, the fourth chamber 14 is provided with a second liquid cooling plate, and the heater is connected to the second liquid cooling plate through another liquid outlet pipe.

[0034] In an alternative embodiment, a second liquid cooling plate is arranged around the high-pressure box.

[0035] In an optional embodiment, the sidewall of the battery cavity 11 is provided with a heat insulation layer.

[0036] In an optional embodiment, the exhaust port of the liquid cooling chamber 12 is provided with a sealing and heat-insulating baffle.

[0037] Please refer to Figures 1 to 2 As shown, in Embodiment 1 of this utility model: the energy storage cabinet 1 is divided into four independent chambers by horizontal and vertical partitions. The battery pack is installed in a separate independent chamber, using a drawer-type installation structure with guide rails for easy installation and subsequent maintenance. A 25mm thick heat insulation layer is installed around the battery chamber 11. The liquid cooler is also installed in a separate independent chamber. To prevent hot air backflow from the liquid cooler, a heat insulation baffle is installed in the exhaust direction. After installation, the heat insulation baffle seals the liquid cooler exhaust port, preventing heat backflow. The PCS ventilation and heat dissipation inside the energy storage cabinet uses air cooling. Therefore, to facilitate PCS ventilation and heat dissipation, the PCS is installed in a separate chamber, with independent air inlet and exhaust channels. The high-voltage box, energy storage management system (EMS), cabinet-type perfluorohexanone fire extinguishing device, and UPS are all located in the same independent chamber. The liquid chiller is connected to each battery pack via inlet and outlet water pipes. During operation, the heat generated by the battery packs and high-voltage box in the energy storage cabinet is conducted to the coolant through the liquid cooling plate. The coolant circulates in the liquid cooling system, carrying the heat to the plate heat exchanger for heat dissipation. Finally, the plate heat exchanger dissipates heat through air cooling. Therefore, after the liquid chiller is installed in an independent chamber inside the energy storage cabinet, we additionally set up independent air inlet and outlet channels to facilitate the final cooling of the entire heat dissipation system.

[0038] The liquid cooling system is equipped with a coolant filler port. Heat dissipated by the battery is absorbed by the liquid cooling plate and then carried away by the coolant. The coolant flows through inlet A throughout the entire heat dissipation system (see reference). Figure 2 (Arrow direction) The circulation pump P1 provides power for the circulation of coolant within the system, driving the coolant to flow throughout the entire circuit.

[0039] When the system detects that the overall ambient temperature is lower than the preset temperature, regulating valve SV02 closes and regulating valve SV01 opens, allowing the coolant to flow to radiator FC101. The heat in the coolant is carried away by the cooling fan. The cooled coolant then flows through heat exchanger PHE and outlet B to the battery liquid cooling plate (reference). Figure 2 (Arrow direction). At this time, the liquid cooling system does not dissipate heat through the air compressor system.

[0040] When the system detects that the overall ambient temperature is higher than the preset temperature, regulating valve SV02 opens and regulating valve SV01 closes, allowing the coolant to flow directly to heat exchanger PHE and then to the battery liquid cooling plate via outlet B. At this time, the liquid cooling system bypasses radiator FC101 for heat dissipation, and the air compressor system operates, using Freon as its cooling medium. Under the action of the heat exchanger, Freon carries away heat from the coolant, with most of the Freon turning into a gaseous state. A small amount of liquid Freon is converted into a gaseous state by the vapor-liquid separator SZ101 and the air compressor. The gaseous Freon then enters cooler Col01 for heat dissipation under the action of the air compressor, and the heat is carried away by the cooling fan. The cooled Freon then returns to heat exchanger PHE. Through the circulation of the coolant and the air compressor system, the heat of the entire system is removed.

[0041] When the system detects that the coolant temperature is too low, the heater HT01 will activate to raise the coolant temperature in order to keep the battery temperature at the set upper limit.

[0042] The liquid cooling system is controlled by the battery management system (BMS). The BMS monitors the battery system voltage, individual cell voltage, and battery module voltage to determine the battery's charging and discharging status, and to identify any abnormalities such as overvoltage or undervoltage. It also monitors parameters such as charging current, discharging current, and internal resistance to assess battery health. Simultaneously, it records the battery pack temperature, coolant inlet and outlet temperatures, individual cell temperatures, average temperatures, and monitors whether the batteries are operating within their normal operating temperature range. The liquid cooling system detects the temperature within the enclosed space of the cabinet and selects the operating mode based on temperature settings. The BMS selects the appropriate mode based on the temperature command, including cooling, heating, and water shortage protection. This ensures precise temperature control of the energy storage equipment during continuous operation, guaranteeing optimal temperature operation, extending equipment lifespan, and improving system stability and efficiency.

[0043] Cooling mode: The default liquid supply temperature for cooling mode is 20℃. When the battery management system issues a cooling mode command, the cooling mode is activated and will continue until the BMS issues a non-cooling mode command. The mode switching delay is 30 seconds.

[0044] Heating mode: The default setpoint for heating mode is 10℃. When the unit receives the cooling mode command from the battery management system, it starts the heating mode and continues until the BMS issues a non-heating mode command. Once the heating mode is exited, the unit immediately enters the given operating mode.

[0045] Mode switching: Cooling mode and heating mode cannot be run at the same time. Cooling mode has higher priority than heating mode.

[0046] System water shortage protection: When the inlet water pressure is detected to be less than the set value of 0.1 bar, the system water shortage alarm will be triggered. At this time, the water pump will stop running, and the water system status needs to be checked manually and water needs to be added. When the system detects that the inlet water pressure is greater than the set value of 0.6 bar, the system water shortage alarm will be cleared.

[0047] In summary, this invention replaces the air-cooling system of the energy storage system with a liquid-cooling system. The liquid-cooling system cools the battery through water pipes, improving cooling efficiency and making battery cooling more uniform. In addition, the battery management system can monitor the temperature inside the battery pack, the inlet and outlet temperatures of the coolant, and the temperature of individual batteries. It switches the liquid-cooling system mode according to the temperature inside the cabinet: switching to heating mode when the temperature is low and switching to cooling mode when the temperature is high, ensuring that the equipment operates within the optimal temperature range, extending the equipment life, and improving the stability and efficiency of the battery system.

[0048] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A heat dissipation system for an energy storage cabinet, characterized in that, include: The cabinet has a battery compartment and a liquid cooling compartment inside. The battery compartment is equipped with a temperature sensor and a first liquid cooling plate, and the liquid cooling compartment is equipped with a liquid cooling unit. The liquid cooling unit includes an inlet pipe, a temperature sensor, and the inlet pipe is connected to a circulating pump. The circulating pump is connected to a radiator through a first regulating valve and to a heat exchanger through a second regulating valve. The radiator is connected to both a cooler and a heat exchanger. The cooler is connected to a cooling fan. The heat exchanger is connected to both a heater and a gas-liquid separator. The heater is connected to a first liquid cooling plate through an outlet pipe. Both the cooler and the gas-liquid separator are connected to an air compressor.

2. The energy storage cabinet heat dissipation system according to claim 1, characterized in that, The liquid cooling unit also includes a coolant filling pipe, which is connected to the circulating pump.

3. The energy storage cabinet heat dissipation system according to claim 1, characterized in that, The battery compartment houses the battery pack, and the first liquid cooling plate is arranged around the battery pack.

4. The energy storage cabinet heat dissipation system according to claim 1, characterized in that, A partition is installed between the battery chamber and the liquid cooling chamber.

5. The energy storage cabinet heat dissipation system according to claim 4, characterized in that, The cabinet's interior is divided into a battery compartment, a liquid cooling compartment, and a third compartment by partitions. The third compartment houses the PCS assembly, and its side walls have heat dissipation channels.

6. The energy storage cabinet heat dissipation system according to claim 5, characterized in that, The cabinet's interior is divided into a battery chamber, a liquid cooling chamber, a third chamber, and a fourth chamber by partitions. The fourth chamber houses a high-voltage box, an energy storage management module, a cabinet-type perfluorohexanone fire extinguishing device, and a UPS.

7. The energy storage cabinet heat dissipation system according to claim 6, characterized in that, The fourth chamber is equipped with a second liquid cooling plate, and the heater is connected to the second liquid cooling plate through another liquid outlet pipe.

8. The energy storage cabinet heat dissipation system according to claim 7, characterized in that, The second liquid cooling plate is arranged around the high-pressure box.

9. The energy storage cabinet heat dissipation system according to claim 1, characterized in that, The sidewalls of the battery compartment are equipped with a heat insulation layer.

10. The energy storage cabinet heat dissipation system according to claim 1, characterized in that, The exhaust vent of the liquid cooling chamber is equipped with a sealed heat insulation baffle.

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