Immersed liquid cooling device, energy storage system and electric equipment

Abstract

The embodiment of the invention provides an immersed liquid cooling device, an energy storage system and electric equipment, the immersed liquid cooling device comprises a liquid cooling unit and a plurality of mutually independent immersion units, and a liquid inlet and a liquid outlet of each immersion unit are connected with the liquid cooling unit in parallel; the electromagnetic valve group comprises a first electromagnetic valve arranged at the liquid inlet of each immersion unit and a second electromagnetic valve arranged at the liquid outlet of each immersion unit; and the battery management system BMS is connected with the electromagnetic valve group, and is used for monitoring the running state of each immersion unit in real time, and closing the corresponding first electromagnetic valve and the second electromagnetic valve when detecting that any immersion unit is in an abnormal state. By arranging the corresponding electromagnetic valves at the liquid inlet and the liquid outlet of the immersion unit, any immersion unit can be isolated from other immersion units when thermal management is out of control and the like, so that the cold liquid of the whole loop is prevented from being influenced, and the stability and the safety of the immersed liquid cooling device are improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage control, and specifically to an immersion liquid cooling device, an energy storage system, and electrical equipment. Background Art

[0002] To ensure that batteries in energy storage systems achieve long cycle life and good charge and discharge performance, effective temperature control (thermal management) is required. Today's immersion cooling systems typically consist of multiple immersion units, which are connected in parallel via a single chiller's liquid inlet and outlet. If a problem occurs in one immersion unit, the coolant will contaminate the other units, weakening the overall cooling effect of the liquid cooling system and impacting the normal operation of the energy storage system. Summary of the Invention

[0003] In view of this, the present application provides an immersion liquid cooling device, an energy storage system and an electrical device, so as to solve the problem of poor temperature control caused by mutual influence of immersion units in the prior art.

[0004] In a first aspect, an embodiment of the present application provides an immersion liquid cooling device, A liquid cooling unit and a plurality of independent immersion units, wherein the liquid inlet and the liquid outlet of each immersion unit are connected to the liquid cooling unit in parallel; A solenoid valve assembly, comprising a first solenoid valve provided at the liquid inlet of each immersion unit and a second solenoid valve at the liquid outlet; The battery management system BMS is connected to the solenoid valve group and is used to monitor the operating status of each immersion unit in real time, and when it is detected that any immersion unit is in an abnormal state, it closes the corresponding first solenoid valve and second solenoid valve.

[0005] In an optional embodiment, the device further includes: a sensor group, including a temperature sensor and a pressure sensor disposed inside each immersion unit; The BMS is connected to the sensor group and is configured to determine the operating status of each immersion unit based on the temperature data and pressure data collected by the sensor group.

[0006] In an optional embodiment, determining the operating status of each immersion unit based on the temperature data and pressure data collected by the sensor group includes: Acquire in real time the temperature data collected by the temperature sensor of each immersion unit, and acquire in real time the pressure data collected by the pressure sensor of each immersion unit; When it is detected that the temperature data corresponding to any immersion unit meets the preset temperature abnormality condition and the corresponding pressure data meets the preset pressure abnormality condition, it is determined that the current immersion unit is in an abnormal state.

[0007] In an optional embodiment, when detecting that the temperature data corresponding to any immersion unit meets a preset temperature abnormality condition and the corresponding pressure data meets a preset pressure abnormality condition, determining that the current immersion unit is in an abnormal state includes: When it is detected that the temperature data of any immersion unit exceeds the temperature threshold and the pressure data exceeds the pressure threshold, it is determined that the current immersion unit is in an abnormal state.

[0008] In an optional embodiment, when detecting that the temperature data corresponding to any immersion unit meets a preset temperature abnormality condition and the corresponding pressure data meets a preset pressure abnormality condition, determining that the current immersion unit is in an abnormal state includes: When it is detected that the temperature data of any immersion unit exceeds the temperature threshold and lasts longer than a first time period, and the pressure data exceeds the pressure threshold and lasts longer than a second time period, it is determined that the current immersion unit is in an abnormal state.

[0009] In an optional embodiment, when detecting that the temperature data corresponding to any immersion unit meets a preset temperature abnormality condition and the corresponding pressure data meets a preset pressure abnormality condition, determining that the current immersion unit is in an abnormal state includes: When it is detected that the temperature data of any immersion unit exceeds the temperature threshold and the temperature change rate is greater than the first threshold, and the pressure data exceeds the pressure threshold and the pressure change rate is greater than the second threshold, it is determined that the current immersion unit is in an abnormal state.

[0010] In an optional embodiment, the device further includes: The buffer tank is connected to the pressure relief port of each immersion unit through a pressure relief pipeline; A pressure relief valve assembly, comprising a pressure relief valve provided at a pressure relief port of each immersion unit; The BMS is further configured to open the corresponding pressure relief valve when detecting that any immersion unit is in an abnormal state, so as to connect the immersion unit in the abnormal state with the buffer tank.

[0011] In an optional embodiment, the BMS is further configured to start timing after the pressure relief valve is opened, and if the current immersion unit is still in an abnormal state after the accumulated time exceeds a third time, the first solenoid valve corresponding to the current immersion unit is opened.

[0012] In an optional embodiment, the BMS is further configured to close the corresponding pressure relief valve and open the corresponding second solenoid valve when detecting that the current immersion unit changes from an abnormal state to a normal state.

[0013] In an optional embodiment, the buffer tank is connected to the inert gas pipeline through an air inlet, and a third solenoid valve is provided at the air inlet; the BMS is also used to open the third solenoid valve when it detects that the temperature and / or pressure in the buffer tank exceeds a first safety threshold.

[0014] In an optional embodiment, the buffer tank is provided with a cooling module; the BMS is further configured to activate the cooling module to cool the buffer tank when detecting that the temperature and / or pressure in the buffer tank exceeds a second safety threshold.

[0015] In an optional embodiment, the BMS is further configured to generate corresponding alarm information when detecting that any immersion unit is in an abnormal state, the alarm information including: the number, temperature data, and pressure data of the current immersion unit.

[0016] In a second aspect, an embodiment of the present application provides an energy storage system, comprising: An immersion liquid cooling device as provided in any one of the first aspects; A battery pack system, consisting of a plurality of battery modules, each of which is arranged in an immersion unit; When any battery module is abnormal, the immersion liquid cooling device isolates the immersion unit where the current battery module is located from other immersion units.

[0017] In a third aspect, an embodiment of the present application provides an electrical device, including: The energy storage system provided in the second aspect; A load device, powered by the energy storage system; When at least one immersion unit in the immersion liquid cooling device is isolated, the energy storage system maintains cooling of the remaining normal immersion units, so that the load equipment continues to operate.

[0018] The immersion liquid cooling device of the embodiment of the present application includes: a liquid cooling unit and multiple independent immersion units, the liquid inlet and liquid outlet of each immersion unit being connected to the liquid cooling unit in parallel; a solenoid valve group including a first solenoid valve provided at the liquid inlet of each immersion unit and a second solenoid valve provided at the liquid outlet; and a battery management system (BMS) connected to the solenoid valve group for real-time monitoring of the operating status of each immersion unit and closing the corresponding first and second solenoid valves upon detecting an abnormal state of any immersion unit. By providing corresponding solenoid valves at the liquid inlet and liquid outlet of an immersion unit, if any immersion unit experiences thermal management runaway, it can be isolated from the other immersion units, thereby preventing the cooling of the entire circuit from being affected and improving the stability of the immersion liquid cooling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 A schematic structural diagram of an immersion liquid cooling device provided in an embodiment of the present application; Figure 2 A schematic structural diagram of another immersion liquid cooling device provided in an embodiment of the present application; Figure 3 A schematic structural diagram of another immersion liquid cooling device provided in an embodiment of the present application; Figure 4 A schematic structural diagram of another immersion liquid cooling device provided in an embodiment of the present application; Figure 5 A schematic structural diagram of another immersion liquid cooling device provided in an embodiment of the present application; Figure 6 A schematic flow chart of a control method for an immersion liquid cooling device provided in an embodiment of the present application; Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0022] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0023] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0024] It should be understood that the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. Furthermore, the character " / " in this document generally indicates an "or" relationship between the associated objects.

[0025] Lithium-ion batteries are widely used in various fields of production and life due to their high energy density and long cycle life. With the recent maturation of lithium-ion battery technology and processes, the capacity of individual batteries has increased. Recently, batteries with capacities exceeding 500Ah have appeared and are gradually gaining application. However, the larger the battery capacity and the larger the cell, the more severe the temperature rise, making cell temperature control increasingly difficult. Unstable cell temperature has a significant impact on battery life. To ensure a long cycle life and good charge and discharge performance, effective temperature control (thermal management) is required. Current battery thermal management methods include air cooling, liquid cooling, and phase change cooling. Liquid cooling solutions include immersion cooling.

[0026] The immersion liquid cooling system is generally composed of a chiller and multiple immersion units. When the chiller delivers the coolant to multiple immersion units, it faces the problem of delivery and distribution. Figure 1 The chiller consists of a cooling source, a plate heat exchanger, and a distribution device. Multiple immersion units are connected in parallel through the distribution device's liquid inlet and outlet. A problem with this liquid cooling system is that if the battery in one of the immersion units experiences thermal management failure, the coolant flowing through that unit will rapidly heat up, contaminating all coolant in the circulation loop and affecting the temperature control capability of the liquid cooling system.

[0027] To address this technical problem, an embodiment of the present application provides an immersion liquid cooling device. By setting solenoid valves at the liquid inlet and outlet of each immersion unit, the abnormal immersion unit can be isolated to ensure that other immersion units are not affected, thereby improving the stability of temperature control.

[0028] Figure 2 A schematic diagram of a flow chart of an immersion liquid cooling device method provided in an embodiment of the present application is shown as follows: Figure 2 As shown, the device includes a liquid cooling unit, multiple independent immersion units, a solenoid valve assembly, and a battery management system (BMS). The immersion units include a first immersion unit, a second immersion unit, a third immersion unit, and a fourth immersion unit. The liquid inlet and outlet of each immersion unit are connected in parallel to the liquid cooling unit, which delivers coolant to the inlet of each immersion unit via a circulation loop. The coolant flows through the interior of the immersion unit and the outlet, then returns to the liquid cooling unit through the circulation loop.

[0029] The solenoid valve group includes a first solenoid valve at the liquid inlet and a second solenoid valve at the liquid outlet of each immersion unit. The BMS is connected to the solenoid valve group to control the opening or closing of each solenoid valve. The BMS can monitor the operating status of each immersion unit in real time. When it detects that any immersion unit is in an abnormal state, it closes the corresponding first solenoid valve and second solenoid valve. The operating status may include: normal state and abnormal state. For example, when the battery pack in an immersion unit experiences problems such as thermal management outage, the temperature and pressure inside the immersion unit will change significantly, and the BMS can determine that the immersion unit is in an abnormal state.

[0030] When the first and second solenoid valves of any immersion unit are closed, the coolant in that unit cannot flow back into the circulation loop, and new coolant cannot enter that unit. If an immersion unit is in an abnormal state, such as thermal management runaway, the BMS can isolate that unit from the liquid cooling system's circulation loop by closing the corresponding first and second solenoid valves. The heat-increasing coolant in that unit will not affect the cooling cycle of other coolants in the circulation loop, ensuring the normal operation of other immersion units and improving the stability and temperature control capabilities of the immersion liquid cooling system.

[0031] In an optional embodiment, the immersion liquid cooling device further comprises: a sensor group. Figure 3 The sensor group includes a temperature sensor and a pressure sensor disposed inside each immersion unit, such as a first pressure sensor and a first temperature sensor disposed inside the first immersion unit.

[0032] The sensor group is connected to the BMS and is used to monitor each immersion unit in real time and send the collected data to the BMS. Specifically, the temperature sensor collects temperature data in real time and sends the temperature data to the BMS, and the pressure sensor collects pressure data in real time and sends the pressure data to the BMS. The BMS determines whether each immersion unit is in an abnormal state based on the temperature data and pressure data. Optionally, when the BMS detects that the temperature data corresponding to any immersion unit meets the preset temperature abnormality condition and the corresponding pressure data meets the preset pressure abnormality condition, it determines that the current immersion unit is in an abnormal state. It can be understood that when the immersion unit has problems such as thermal management out of control, its internal pressure and temperature will rise significantly. The BMS can accurately judge the operating status of the immersion unit by combining the changes in temperature data and pressure data.

[0033] In an optional embodiment, the BMS may set a temperature threshold and a pressure threshold in advance, and when it detects that the temperature data of any immersion unit exceeds the temperature threshold and the pressure data exceeds the pressure threshold, it determines that the current immersion unit is in an abnormal state. Specifically, the BMS continuously monitors the temperature data, and when it detects that the temperature of any immersion unit exceeds the temperature threshold, it marks the immersion unit as having a temperature abnormality. At the same time, the BMS also continuously monitors the pressure data, and when it detects that the pressure of any immersion unit exceeds the pressure threshold, it marks the immersion unit as having a pressure abnormality. When the temperature abnormality mark and the pressure abnormality mark appear in the same immersion unit, the BMS can determine that the corresponding immersion unit is in an abnormal state.

[0034] In an optional embodiment, the determination of an abnormal state may also include the following: (1) When the temperature data of any immersion unit exceeds a temperature threshold and lasts longer than a first duration, and the pressure data exceeds a pressure threshold and lasts longer than a second duration, the immersion unit is determined to be in an abnormal state. By setting the first duration and the second duration, misjudgment of the state caused by sudden changes in temperature or pressure data can be avoided, thereby improving the accuracy of the BMS in determining the operating status of the immersion unit.

[0035] (2) When it is detected that the temperature data of any immersion unit exceeds the temperature threshold and the temperature change rate is greater than the first threshold, and the pressure data exceeds the pressure threshold and the pressure change rate is greater than the second threshold, it is determined that the current immersion unit is in an abnormal state. Considering that environmental changes may also affect the temperature and pressure of the immersion unit, the BMS can also set a first threshold for the temperature change rate and a second threshold for the pressure change rate. Under normal circumstances, environmental changes will affect the pressure and temperature of the immersion unit more slowly, while abnormal phenomena such as battery pack failures will cause the temperature and pressure of the immersion unit to rise rapidly, and the temperature change rate and pressure change rate will be larger. By setting the first threshold and the second threshold, the misjudgment of abnormal states caused by environmental changes can be reduced.

[0036] In an optional embodiment, the above-mentioned immersion liquid cooling device further includes: a buffer tank and a pressure relief valve group. In addition to being provided with a liquid inlet and a liquid outlet, each immersion unit is also provided with a pressure relief port. The buffer tank is connected to the pressure relief ports of each immersion unit through a pressure relief pipeline, and the pressure relief valve group includes a pressure relief valve provided at the pressure relief port of each immersion unit. The BMS is connected to the pressure relief valve group to control the opening and closing of each pressure relief valve. Specifically, when the BMS detects that any immersion unit is in an abnormal state, it opens the corresponding pressure relief valve to connect the immersion unit in the abnormal state with the buffer tank.

[0037] Reference Figure 4The pressure relief valve group may include multiple pressure relief valves, which are respectively arranged at the pressure relief ports of the corresponding immersion units. When any immersion unit is in an abnormal state, its internal temperature and pressure will usually fluctuate violently. Since the solenoid valves at the liquid inlet and outlet are closed at this time, the pressure relief valve needs to be opened to relieve the internal pressure and high temperature of the immersion unit. Taking the first immersion unit as an example, when the first pressure relief valve is opened, the pressure relief port of the first immersion unit is connected to the pressure relief pipeline, and the other end of the pressure relief pipeline is connected to the buffer tank. The high-temperature and high-pressure gas inside the first immersion unit can enter the buffer tank through the pressure relief pipeline to promote the temperature and pressure inside the first immersion unit to return to normal.

[0038] In an embodiment of the present application, by providing a buffer tank and a pressure relief valve, the temperature and pressure inside the immersion unit can be relieved after the first solenoid valve and the second solenoid valve are closed, which can promote the immersion unit to return to normal faster, avoid damage to the immersion unit due to high temperature and high pressure, and extend the life of the device.

[0039] In an optional embodiment, in order to further speed up the recovery of the immersion unit, the BMS starts timing after opening the pressure relief valve. If the current immersion unit is still in an abnormal state after the accumulated time exceeds the third time, the first solenoid valve corresponding to the current immersion unit is opened. Taking the first immersion unit as an example, after the first solenoid valve is opened, the coolant in the circulation loop can enter the first immersion unit to assist in cooling and reducing the pressure of the battery pack. At this time, the first pressure relief valve is still open, and the high-temperature and high-pressure gas and coolant in the first immersion unit can enter the buffer tank through the pressure relief pipeline. By continuously allowing new coolant to enter the immersion unit, the interior of the immersion unit can be cooled more efficiently, achieving rapid recovery of the temperature and pressure of the immersion unit.

[0040] In an optional embodiment, when the BMS detects that an immersion unit has returned to normal from an abnormal state, it can close the corresponding pressure relief valve and open the corresponding second solenoid valve. For example, when the temperature and pressure of the first immersion unit return to below corresponding thresholds, the BMS can close the pressure relief valve and open the second solenoid valve to reconnect the first immersion unit to the circulation circuit. If the immersion unit returns to normal within the third time period, the BMS will also need to simultaneously open the first solenoid valve.

[0041] In an optional embodiment, the buffer tank can be connected to the inert gas pipeline via an air inlet, and a third solenoid valve is provided at the air inlet. A temperature sensor and a pressure sensor can also be provided within the buffer tank. The BMS can use these sensors to determine the temperature and pressure within the buffer tank, and can control the connection or disconnection between the buffer tank and the inert gas pipeline via the third solenoid valve. When the BMS detects that the temperature and / or pressure within the buffer tank exceeds a first safety threshold, it can open the third solenoid valve to connect the inert gas pipeline to the buffer tank, allowing inert gas to enter the buffer tank, thereby diluting flammable and explosive substances within the buffer tank and preventing combustion or explosion accidents within the buffer tank.

[0042] In an optional embodiment, a combustible gas sensor can be installed in the buffer tank to detect the concentration of combustible gas in the buffer tank. The BMS can preset an explosion safety threshold. When the combustible gas concentration in the buffer tank exceeds a certain percentage of the lower explosion limit (e.g., 40%), the third solenoid valve is opened to allow inert gas to enter the buffer tank to dilute the combustible gas.

[0043] In an embodiment of the present application, by arranging a pressure sensor, a temperature sensor or a combustible gas sensor in the buffer tank, the third solenoid valve can be opened when there is a risk of explosion of the material in the buffer tank, so that the buffer tank is connected to the inert gas pipeline, thereby reducing the concentration of the combustible gas to ensure the safety of the buffer tank.

[0044] In an optional embodiment, the buffer tank is further provided with a cooling module. When the BMS detects that the temperature and / or pressure within the buffer tank exceeds a second safety threshold, it can activate the cooling module to cool the buffer tank. Alternatively, the cooling module can be implemented using a liquid carbon dioxide injection system. When the temperature and pressure within the buffer tank exceed the threshold, the cooling module can inject liquid carbon dioxide into the buffer tank to quickly reduce the temperature and pressure within the buffer tank.

[0045] In the embodiment of the present application, liquid carbon dioxide will vaporize after being sprayed into the buffer tank, and quickly absorb the heat in the buffer tank. Afterwards, the expansion and work of the carbon dioxide gas will further lower the temperature in the buffer tank. Through the dual heat absorption of vaporization and expansion, the buffer tank can be cooled in seconds, and the safety of the buffer tank can be ensured in coordination with the inert gas.

[0046] In an optional embodiment, while processing an abnormal immersion unit, the BMS also generates an alarm message. Specifically, upon confirming that an immersion unit is in an abnormal state, the BMS may generate an alarm message containing the current immersion unit number, temperature data, and pressure data. During the cooling process, the BMS will also record the processing method in the alarm message, including information such as: "Pressure relief valve opened", "Second solenoid valve closed", "First solenoid valve closed", and "First solenoid valve reopened". When the immersion unit returns to normal, the BMS will also synchronize this information with other controllers.

[0047] In the embodiment of the present application, by generating an alarm message, it can help notify the staff to quickly locate the location and situation of the abnormal immersion unit, thereby improving the safety of the device. In addition, the information recorded in the alarm message can be used for subsequent accident analysis to optimize the overall equipment.

[0048] In an optional embodiment, when an immersion unit enters an abnormal state, it is isolated from the circulation loop. This increases the total resistance of the circulation loop and reduces the total flow rate, resulting in a decrease in the coolant flow rate of the remaining immersion units and reduced heat exchange efficiency. To address this issue, the BMS can dynamically adjust the output power of the liquid cooling unit to increase the flow rate of the remaining normal immersion units. Specifically, when one or more immersion units enter an abnormal state, the BMS can count the number N of abnormal immersion units and dynamically adjust the output power P of the liquid cooling unit based on the ratio of N to the total number of immersion units M. For example, N and P can be positively correlated. A larger N indicates more isolated immersion units, a greater total resistance in the circulation loop, and a greater impact on other immersion units. The BMS can then increase the output power P to ensure stable flow rates for the remaining immersion units. Conversely, as the abnormal immersion units return to normal, N decreases, the total resistance in the circulation loop decreases, and the impact on the remaining immersion units decreases. The BMS can then reduce the output power P to avoid excessive pressure in the circulation loop and maintain the health of the equipment.

[0049] In an optional embodiment, each immersion unit may also be provided with an air inlet, and a fourth solenoid valve may be provided at the air inlet, and the immersion unit may be connected to the nitrogen injection device through the air inlet. The pressure relief port and the air inlet should be provided at different positions, for example, the pressure relief port is provided above the immersion unit, and the air inlet is provided below the immersion unit. When any immersion unit is in an abnormal state, the BMS closes the first solenoid valve and the second solenoid valve, opens the pressure relief valve and the fourth solenoid valve, and forms a two-way convection path of "bottom nitrogen injection-top high temperature and high pressure discharge". On the one hand, the nitrogen injection device sprays nitrogen into the immersion unit to suppress boiling and splashing of the electrolyte; on the other hand, the high temperature and high pressure gas in the immersion unit enters the buffer tank through the pressure relief valve to relieve the temperature and pressure in the immersion unit.

[0050] In the embodiments of this application, nitrogen enters the immersion unit through a porous injection device, rapidly reducing the local oxygen concentration and inhibiting ignition of combustible gases. Secondly, the low-temperature nitrogen directly contacts the thermal runaway point of the battery pack, reducing the battery pack surface temperature in a very short time through forced convection heat transfer. The combination of the nitrogen injection device and the buffer tank allows for relatively safe temperature control of the immersion unit, significantly improving the system's economic efficiency and safety.

[0051] Figure 6 This is a flow chart of a control method for an immersion liquid cooling device provided in an embodiment of the present application. This method can be applied to BMS, such as Figure 6 As shown, including: Step 601: Acquire temperature data and pressure data of each immersion unit.

[0052] Step 602: Determine the operating status of each immersion unit based on the temperature data and the pressure data.

[0053] Step 603: When it is detected that any immersion unit is in an abnormal state, the corresponding first solenoid valve and second solenoid valve are closed.

[0054] For other details, please refer to the description of the above device.

[0055] This application also provides an energy storage system, comprising an immersion liquid cooling device and a battery pack system. The battery pack system comprises multiple battery modules, each of which is housed in an immersion unit. If any battery module experiences an abnormality, the immersion liquid cooling device isolates the immersion unit containing the current battery module from the other immersion units.

[0056] The present application also provides an electrical device comprising an energy storage system and a load device. The load device is powered by the energy storage system. When at least one immersion unit in an immersion liquid cooling device is isolated, the energy storage system maintains cooling of the remaining normal immersion units, allowing the load device to continue operating.

[0057] Corresponding to the above embodiments, the present application also provides an electronic device. Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device 700 may include: a processor 701, a memory 702, and a communication unit 703. These components communicate via one or more buses. Those skilled in the art will understand that the structure of the electronic device shown in the figure does not constitute a limitation on the embodiments of the present application. It can be a bus structure or a star structure, and can also include more or fewer components than shown, or combine certain components, or arrange the components differently.

[0058] The communication unit 703 is configured to establish a communication channel so that the electronic device can communicate with other devices, receive user data sent by other devices, or send user data to other devices.

[0059] The processor 701 is the control center of the electronic device. It uses various interfaces and lines to connect various parts of the entire electronic device. It runs or executes software programs, instructions, and / or modules stored in the memory 702, and calls data stored in the memory to perform various functions of the electronic device and / or process data. The processor can be composed of an integrated circuit (IC), for example, it can be composed of a single packaged IC, or it can be composed of multiple packaged ICs with the same or different functions. For example, the processor 701 can only include a central processing unit (CPU). In the embodiment of the present application, the CPU can be a single computing core or multiple computing cores.

[0060] The memory 702 is used to store execution instructions of the processor 701. The memory 702 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0061] When the execution instructions in the memory 702 are executed by the processor 701 , the electronic device 700 is enabled to execute part or all of the steps in the above embodiments.

[0062] In a specific implementation, the present application further provides a computer storage medium, wherein the computer storage medium may store a program that, when executed, may include some or all of the steps of each embodiment of the immersion liquid cooling device method provided in the present application. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

[0063] In a specific implementation, the present application also provides a computer program product, wherein the computer program product includes executable instructions. When the executable instructions are executed on a computer, the computer executes some or all of the steps in each embodiment of the immersion liquid cooling device control method provided in the present application.

[0064] An embodiment of the present application further provides a non-transitory computer-readable storage medium, which stores computer instructions. The computer instructions enable the computer to execute the immersion liquid cooling device control method provided in the embodiment of the present application.

[0065] The aforementioned non-transitory computer-readable storage medium may take the form of any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more conductors, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) or flash memory, optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0066] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries computer-readable program code. Such a propagated data signal may take a variety of forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0067] Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0068] Those skilled in the art will clearly understand that the technology in the embodiments of the present application can be implemented by means of software plus the necessary general-purpose hardware platform. Based on this understanding, the technical solutions in the embodiments of the present application, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in various embodiments or certain parts of the embodiments of the present application.

[0069] In this specification, reference can be made to the same or similar parts between the various embodiments. In particular, for the device embodiment and the terminal embodiment, since they are basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description in the method embodiment.

Claims

1. An immersion liquid cooling device, characterized in that: include: A liquid cooling unit and a plurality of independent immersion units, wherein the liquid inlet and the liquid outlet of each immersion unit are connected to the liquid cooling unit in parallel; A solenoid valve assembly, comprising a first solenoid valve provided at the liquid inlet of each immersion unit and a second solenoid valve at the liquid outlet; The battery management system BMS is connected to the solenoid valve group and is used to monitor the operating status of each immersion unit in real time, and when it is detected that any immersion unit is in an abnormal state, it closes the corresponding first solenoid valve and second solenoid valve.

2. The immersion liquid cooling device according to claim 1, characterized in that: The device further comprises: a sensor group, including a temperature sensor and a pressure sensor disposed inside each immersion unit; The BMS is connected to the sensor group and is configured to determine the operating status of each immersion unit based on the temperature data and pressure data collected by the sensor group.

3. The immersion liquid cooling device according to claim 2, characterized in that: The determining the operating status of each immersion unit based on the temperature data and pressure data collected by the sensor group includes: Acquire in real time the temperature data collected by the temperature sensor of each immersion unit, and acquire in real time the pressure data collected by the pressure sensor of each immersion unit; When it is detected that the temperature data corresponding to any immersion unit meets the preset temperature abnormality condition and the corresponding pressure data meets the preset pressure abnormality condition, it is determined that the current immersion unit is in an abnormal state.

4. The immersion liquid cooling device according to claim 3, characterized in that: When detecting that the temperature data corresponding to any immersion unit meets the preset temperature abnormality condition and the corresponding pressure data meets the preset pressure abnormality condition, determining that the current immersion unit is in an abnormal state includes: When it is detected that the temperature data of any immersion unit exceeds the temperature threshold and the pressure data exceeds the pressure threshold, it is determined that the current immersion unit is in an abnormal state.

5. The immersion liquid cooling device according to claim 3, characterized in that: When detecting that the temperature data corresponding to any immersion unit meets the preset temperature abnormality condition and the corresponding pressure data meets the preset pressure abnormality condition, determining that the current immersion unit is in an abnormal state includes: When it is detected that the temperature data of any immersion unit exceeds the temperature threshold and lasts longer than a first time period, and the pressure data exceeds the pressure threshold and lasts longer than a second time period, it is determined that the current immersion unit is in an abnormal state.

6. The immersion liquid cooling device according to claim 3, characterized in that: When detecting that the temperature data corresponding to any immersion unit meets the preset temperature abnormality condition and the corresponding pressure data meets the preset pressure abnormality condition, determining that the current immersion unit is in an abnormal state includes: When it is detected that the temperature data of any immersion unit exceeds the temperature threshold and the temperature change rate is greater than the first threshold, and the pressure data exceeds the pressure threshold and the pressure change rate is greater than the second threshold, it is determined that the current immersion unit is in an abnormal state.

7. The immersion liquid cooling device according to claim 1, characterized in that: The device further comprises: The buffer tank is connected to the pressure relief port of each immersion unit through a pressure relief pipeline; A pressure relief valve assembly, comprising a pressure relief valve provided at a pressure relief port of each immersion unit; The BMS is further configured to open the corresponding pressure relief valve when detecting that any immersion unit is in an abnormal state, so as to connect the immersion unit in the abnormal state with the buffer tank.

8. The immersion liquid cooling device according to claim 7, characterized in that: The BMS is further configured to start timing after opening the pressure relief valve, and if the current immersion unit is still in an abnormal state after the accumulated time exceeds a third time, open the first solenoid valve corresponding to the current immersion unit.

9. The immersion liquid cooling device according to claim 8, characterized in that: The BMS is further configured to close the corresponding pressure relief valve and open the corresponding second solenoid valve when detecting that the current immersion unit changes from an abnormal state to a normal state.

10. The immersion liquid cooling device according to claim 7, characterized in that: The buffer tank is connected to the inert gas pipeline through an air inlet, and a third solenoid valve is provided at the air inlet; The BMS is further configured to open the third solenoid valve when detecting that the temperature and / or pressure in the buffer tank exceeds a first safety threshold.

11. The immersion liquid cooling device according to claim 7, characterized in that: The buffer tank is provided with a cooling module; The BMS is further configured to activate the cooling module to cool the buffer tank when detecting that the temperature and / or pressure in the buffer tank exceeds a second safety threshold.

12. The immersion liquid cooling device according to claim 2, characterized in that: The BMS is further configured to generate corresponding alarm information when detecting that any immersion unit is in an abnormal state, wherein the alarm information includes: the number, temperature data, and pressure data of the current immersion unit.

13. An energy storage system, characterized in that: include: The immersion liquid cooling device according to any one of claims 1 to 12; A battery pack system, consisting of a plurality of battery modules, each of which is arranged in an immersion unit; When any battery module is abnormal, the immersion liquid cooling device isolates the immersion unit where the current battery module is located from other immersion units.

14. An electrical device, characterized in that: include: The energy storage system according to claim 13; A load device, powered by the energy storage system; When at least one immersion unit in the immersion liquid cooling device is isolated, the energy storage system maintains cooling of the remaining normal immersion units, so that the load equipment continues to operate.

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