Control method and device of energy storage system, energy storage system, chip, medium and program product

Abstract

The embodiment of the invention provides a control method and device of an energy storage system, the energy storage system, a chip, a medium and a program product, the energy storage system comprises a water chilling unit, and the control method comprises the steps that it is determined that the water chilling unit is in a dormant state; in the dormancy period of the water chilling unit, the water chilling unit is periodically detected, and in the periodic detection process of the water chilling unit, the water chilling unit is in at least two modes of a refrigeration mode, a heating mode and a self-circulation mode; and under the condition that the water chilling unit breaks down, fault information of the water chilling unit is sent. Therefore, the water chilling unit can stably operate after being awakened, the shutdown risk of the water chilling unit is reduced, and the overall reliability and stability of the whole energy storage system are improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage, and more specifically, to a control method, device, energy storage system, chip, medium and program product of an energy storage system. Background Art

[0002] As the world increases its support for the development of new energy technologies, various technologies related to energy storage have been widely used. In order to meet the needs of large-capacity energy storage devices, it is necessary to manage them through the water cooling units in the energy storage devices. Therefore, how to effectively manage the water cooling units in the energy storage devices is an urgent problem to be solved. Summary of the invention

[0003] The embodiments of the present application provide a control method, device, energy storage system, chip, medium and program product of an energy storage system, so that the water cooling unit can operate stably after being awakened, reducing the risk of shutdown of the water cooling unit, thereby improving the overall reliability and stability of the entire energy storage system.

[0004] In a first aspect, the present application provides a control method for an energy storage system, the energy storage system including a water cooling unit, the control method including: determining that the water cooling unit is in a dormant state; performing periodic detection on the water cooling unit during the dormant period of the water cooling unit, wherein during the periodic detection of the water cooling unit, the water cooling unit is in at least two modes of cooling mode, heating mode and self-circulation mode; in the event of a failure of the water cooling unit, sending fault information of the water cooling unit.

[0005] In the technical solution of the embodiment of the present application, the water-cooling controller in the water-cooling unit controls the water-cooling unit to perform self-check during the dormancy period of the water-cooling unit, and reports the fault information when it is detected that the water-cooling unit has a fault, so as to transmit the fault information to the client or the after-sales service, so as to facilitate the client to formulate early warning measures in advance, and the after-sales service can quickly respond to maintenance to improve customer satisfaction. In addition, the self-check can enable the water-cooling unit to quickly resume normal operation when it needs to work, thereby improving the overall reliability and stability of the energy storage system. Further, the self-check in the dormant state can detect whether the water-cooling unit is abnormal or damaged, and perform maintenance or replacement in time, so that the water-cooling unit can operate stably after waking up, reduce the risk of water-cooling unit shutdown, and thus improve the overall reliability and stability of the entire energy storage system. In addition, by periodically detecting the water-cooling unit during the dormancy period of the water-cooling unit, the fault of the water-cooling unit can be detected more accurately, so that the water-cooling unit can operate stably after waking up, reduce the risk of water-cooling unit shutdown, and thus improve the overall reliability and stability of the entire energy storage system. In addition, during the detection process, the water-cooling unit is tested in at least two modes of cooling mode, heating mode and self-circulation mode in sequence to more accurately detect whether the water-cooling unit has a fault, thereby improving the self-inspection health of the water-cooling unit.

[0006] In some embodiments, the control method further includes: receiving data information sent by multiple sensors in the water cooling unit; and confirming fault information based on the data information.

[0007] In the technical solution of the embodiment of the present application, during the detection of the water-cooling unit, data information sent by multiple sensors in the water-cooling unit is received to accurately determine the fault information of each component in the water-cooling unit, thereby improving the self-inspection health of the water-cooling unit, so that the water-cooling unit can operate stably after being awakened, reducing the risk of shutdown of the water-cooling unit, and thereby improving the overall reliability and stability of the entire energy storage system.

[0008] In some embodiments, the water cooling unit includes a compressor, a heat exchanger, and a first pressure sensor located between the compressor and the heat exchanger. The control method also includes: receiving data information sent by the first pressure sensor, the data information including first pressure data; based on the first pressure data, determining first fault information included in the fault information, the first fault information indicating that a heat exchanger fault occurs.

[0009] In the technical solution of the embodiment of the present application, a first pressure sensor is arranged between the heat exchanger and the compressor to detect the first pressure data of the coolant passing through the heat exchanger, thereby determining whether the heat exchanger in the water-cooled unit has failed. Through this process, the self-check in the dormant state can detect whether there is an abnormality or damage to the water-cooled unit, and perform maintenance or replacement in time, so that the water-cooled unit can operate stably after waking up, reducing the risk of shutdown of the water-cooled unit, thereby improving the overall reliability and stability of the entire energy storage system.

[0010] In some embodiments, the water cooling unit also includes a compressor, a condenser and a second pressure sensor, the second pressure sensor is arranged between the compressor and the condenser, and the control method also includes: receiving data information sent by the second pressure sensor, the data information includes the second pressure data; according to the pressure difference and the preset pressure data, determining the second fault information included in the fault information, the second fault information indicates that the compressor has a fault, and the pressure difference is the difference between the second pressure data and the first pressure data.

[0011] In the technical solution of the embodiment of the present application, a second pressure sensor is arranged between the compressor and the condenser to detect the second pressure data of the coolant passing through the compressor, thereby determining whether the compressor in the water-cooling unit fails. Through this process, the self-check in the dormant state can detect whether there is an abnormality or damage in the water-cooling unit, and perform maintenance or replacement in time, so that the water-cooling unit can operate stably after waking up, reducing the risk of shutdown of the water-cooling unit, thereby improving the overall reliability and stability of the entire energy storage system.

[0012] In some embodiments, the water cooling unit also includes an expansion valve and a first temperature sensor arranged near the expansion valve, and the control method also includes: receiving data information sent by the first temperature sensor, the data information including first temperature data; based on the first temperature data, determining third fault information included in the fault information, the third fault information indicating that the expansion valve has a fault.

[0013] In the technical solution of the embodiment of the present application, a first temperature sensor is arranged near the expansion valve to detect the first temperature data of the coolant passing through the expansion valve, thereby determining whether the expansion valve in the water-cooled unit has failed. Through this process, the self-check in the dormant state can detect whether there is an abnormality or damage in the water-cooled unit, and perform maintenance or replacement in time, so that the water-cooled unit can operate stably after waking up, reducing the risk of shutdown of the water-cooled unit, thereby improving the overall reliability and stability of the entire energy storage system.

[0014] In some embodiments, the energy storage system also includes a battery device and a third pressure sensor, the battery device and the water cooling unit are connected through a water supply circuit, and the third pressure sensor is arranged in the water supply circuit. The control method also includes: receiving data information sent by the third pressure sensor, the data information includes third pressure data; according to the third pressure data, determining fourth fault information included in the fault information, and the fourth fault information indicates that any component of the water cooling unit has a fault.

[0015] In the technical solution of the embodiment of the present application, a third pressure sensor is arranged in the water supply circuit to detect the third pressure data of the coolant passing through the water supply circuit, thereby determining whether the water supply circuit in the water cooling unit fails, that is, determining whether the water cooling unit fails. Through this process, the self-check in the dormant state can detect whether there is an abnormality or damage in the water cooling unit, and perform maintenance or replacement in time, so that the water cooling unit can operate stably after waking up, reducing the risk of shutdown of the water cooling unit, and thereby improving the overall reliability and stability of the entire energy storage system.

[0016] In some embodiments, the energy storage system also includes a second temperature sensor, which is arranged in a water supply circuit and receives data information sent by the second temperature sensor, wherein the data information includes second temperature data; based on the second temperature data, fifth fault information included in the fault information is determined, and the fifth fault information indicates that any component of the water cooling unit has a fault.

[0017] In the technical solution of the embodiment of the present application, a second temperature sensor is arranged in the water supply circuit to detect the second temperature data of the coolant passing through the water supply circuit, thereby determining whether the water supply circuit in the water cooling unit fails, that is, determining whether the water cooling unit fails. Through this process, the self-check in the dormant state can detect whether there is an abnormality or damage in the water cooling unit, and perform maintenance or replacement in time, so that the water cooling unit can operate stably after waking up, reducing the risk of shutdown of the water cooling unit, and thereby improving the overall reliability and stability of the entire energy storage system.

[0018] In some embodiments, the control method further includes: receiving thermal management requirements sent by the battery management system; testing the water cooling unit according to the thermal management requirements; and sending fault information of the water cooling unit in the event of a failure of the water cooling unit.

[0019] In the technical solution of the embodiment of the present application, a thermal management demand, such as cooling or heating, sent by a battery management system is received. During normal operation, the water cooling unit is detected to detect whether the water cooling unit fails. By detecting whether the water cooling unit is abnormal or damaged under normal working conditions, maintenance or replacement is performed in a timely manner, so that the water cooling unit can operate stably after being awakened, reducing the risk of shutdown of the water cooling unit, thereby improving the overall reliability and stability of the entire energy storage system.

[0020] In some embodiments, the self-circulation mode is a mode in which the cooling medium circulates in the water supply loop when the water cooling unit is in a dormant state.

[0021] In a second aspect, the present application provides an energy storage system, comprising: a water cooling unit, the water cooling unit comprising a water cooling control unit, the water cooling control unit being used to determine whether the water cooling unit is in a dormant state; during the dormant period of the water cooling unit, periodically detecting the water cooling unit, wherein during the periodic detection of the water cooling unit, the water cooling unit is in at least two modes of cooling mode, heating mode and self-circulation mode; in the event of a failure of the water cooling unit, the failure information of the water cooling unit is sent to a battery management system.

[0022] In the technical solution of the embodiment of the present application, the water-cooling controller in the water-cooling unit controls the water-cooling unit to perform self-inspection during the dormant period of the water-cooling unit. When it is detected that the water-cooling unit has a fault, the fault information is reported to the battery management system to pass the fault information to the client or the after-sales service, so as to facilitate the client to formulate early warning measures in advance and the after-sales service to respond quickly for maintenance, thereby improving customer satisfaction. In addition, self-inspection can enable the water-cooling unit to quickly resume normal operation when it needs to work, thereby improving the overall reliability and stability of the energy storage system. Furthermore, the self-inspection in the dormant state can detect whether there is an abnormality or damage to the water-cooling unit, and perform maintenance or replacement in time, so that the water-cooling unit can operate stably after waking up, reducing the risk of water-cooling unit shutdown, thereby improving the overall reliability and stability of the entire energy storage system.

[0023] In a third aspect, the present application provides a control device for an energy storage system, the energy storage system comprising a water cooling unit, the control device comprising a determination unit and a processing unit, the determination unit being used to determine whether the water cooling unit is in a dormant state; the processing unit being used to perform periodic detection on the water cooling unit during the dormant period of the water cooling unit, wherein during the periodic detection of the water cooling unit, the water cooling unit is in at least two modes including a cooling mode, a heating mode and a self-circulation mode; the processing unit is further used to send fault information of the water cooling unit to a battery management system when a fault occurs in the water cooling unit.

[0024] In a fourth aspect, the present application provides a control device for an energy storage system, comprising: a processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute: a control method for an energy storage system as described in any one of the first aspects.

[0025] In a fifth aspect, the present application provides an energy storage system, comprising: a water cooling unit, wherein the water cooling unit is used to execute the control method of the energy storage system as described in any one of the above-mentioned first aspects.

[0026] In a sixth aspect, the present application provides a chip, comprising: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a control method for an energy storage system as described in any one of the first aspects.

[0027] In a seventh aspect, the present application provides a computer-readable storage medium, comprising: a computer program is stored on the computer-readable storage medium, and when the computer program is run on a computer, the computer executes the control method of the energy storage system as described in any one of the first aspects.

[0028] In an eighth aspect, the present application provides a computer program product, wherein the computer program product includes instructions for executing the control method of the energy storage system as described in any one of the first aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A partial structural schematic diagram of a battery device according to an embodiment of the present application is shown.

[0030] Figure 2 A schematic flow chart of a control method for an energy storage system provided in an embodiment of the present application is shown.

[0031] Figure 3 A module schematic diagram of an energy storage system provided in an embodiment of the present application is shown.

[0032] Figure 4 A schematic flow chart of a control method for an energy storage system provided in an embodiment of the present application is shown.

[0033] Figure 5 A structural schematic diagram of another energy storage system provided in an embodiment of the present application is shown.

[0034] Figure 6 A schematic flow chart of a control method for an energy storage system provided in an embodiment of the present application is shown.

[0035] Figure 7 A schematic flow chart of a control method for an energy storage system provided in an embodiment of the present application is shown.

[0036] Figure 8 A schematic flow chart of a control method for an energy storage system provided in an embodiment of the present application is shown.

[0037] Fig. 9 A schematic flow chart of a control method for an energy storage system provided in an embodiment of the present application is shown.

[0038] Fig.10 A schematic flow chart of a control method for an energy storage system provided in an embodiment of the present application is shown.

[0039] Fig.11 A schematic flow chart of a control method for an energy storage system provided in an embodiment of the present application is shown.

[0040] Figure numerals: battery device 10, battery cell 12, first box body 111, second box body 112, water cooling unit 320, water cooling controller 321, BMS330, heater 521, compressor 523, heat exchanger 522, condenser 524, expansion valve 525, first pressure sensor 5261, second pressure sensor 5262, first temperature sensor 5263, third pressure sensor 5264, second temperature sensor 5265. DETAILED DESCRIPTION

[0041] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0042] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0043] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0044] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0045] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0046] If not otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0047] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0048] If there is no special explanation, all steps of the present application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, it is mentioned that the method may also include step (c), which means that step (c) can be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0049] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar component.

[0050] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0051] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0052] In some embodiments, the battery device may be a battery pack, which includes a box and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the box.

[0053] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0054] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0055] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0056] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0057] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0058] The embodiment of the present application provides an energy storage device, including one or more battery clusters (Battery Cluster) to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices, and the multiple battery devices are connected in series through a busbar component to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0059] The energy storage device can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems or temporary power supply systems. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during low power consumption and provide electrical energy to relevant users or electrical equipment during peak power consumption. The energy storage system provided in the embodiment of the present application can be any power system that requires the use of an energy storage device.

[0060] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0061] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters, wherein the battery clusters are housed in the cabinet.

[0062] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a master control module, a power distribution module, and a fire protection module.

[0063] As an example, the thermal management module may include a liquid cooling unit that provides cooling liquid for regulating the temperature of the battery cells to each battery device through a pipeline.

[0064] As an example, the main control module can be used as a battery management unit of a battery cluster to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power or temperature of the battery cluster. For example, the charging and discharging current and voltage of the battery cluster can be controlled. The main control module includes a slave battery management unit SBMU (Slave Battery Management Unit, SBMU), a fusion switch and other modules.

[0065] As an example, the master control module can be used as a battery management unit of an energy storage device to monitor and manage the energy storage device. The master control module can monitor information such as the current, voltage, power, state of charge or temperature of the energy storage device. For example, the charging and discharging current, voltage, etc. of the energy storage device can be controlled. As an example, the master control module includes an insulation monitoring module IMM (Insulation Monitoring Module, abbreviated as IMM), a master battery management unit MBMU (Master Battery Management Unit, MBMU), Ethernet ETH (EtherNet, ETH) and a fiber optic conversion module.

[0066] As an example, the fire protection system includes a control panel, detectors, alarm devices, etc., which are used to detect, alarm or extinguish fire in the energy storage system.

[0067] As an example, the power distribution device may be used to distribute power to the power modules of the energy storage device.

[0068] In some embodiments, the energy storage system may include one or more energy storage devices and a power conversion device, wherein the power conversion device is used to connect between the power generation device and the energy storage device. The power generation device is used to generate electrical energy, and the electrical energy generated by the power generation device can be stored in the energy storage device through the power conversion device. As an example, the power generation device may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of the power generation device is not limited in this application.

[0069] Energy storage systems, especially large-scale battery energy storage systems, generate a lot of heat during the charging and discharging process. If this heat cannot be dissipated in a timely and effective manner, the battery temperature will rise, which will affect the performance and safety of the battery. Therefore, in order to ensure the stability and safety of the energy storage system, the water cooling unit becomes an indispensable component. The water cooling unit absorbs the heat in the energy storage system by circulating coolant and transfers the heat to the external environment, thereby maintaining the battery device and other electronic components within a suitable operating temperature range.

[0070] Normally, if a water-cooled unit fails during operation, the water-cooled controller in the water-cooled unit will report the fault information to the battery management system (BMS), and further report it to the terminal device to remind the user to perform maintenance. However, if the water-cooled unit has not been working for a long time and is in a dormant state, it is also necessary to perform fault detection on the water-cooled unit, so that even if the water-cooled unit is not working, the fault information can be reported to the BMS through detection, and maintenance or replacement can be performed in time, so that the water-cooled unit can operate stably after being awakened, reducing the risk of water-cooled unit shutdown, thereby improving the overall reliability and stability of the entire energy storage system.

[0071] Based on the above considerations, in order to alleviate the risk of water-cooled unit shutdown, the present application proposes a control method for an energy storage system, the energy storage system includes a water-cooled unit, and the control method includes: determining that the water-cooled unit is in a dormant state; during the dormant period of the water-cooled unit, periodically detecting the water-cooled unit, wherein, during the periodic detection of the water-cooled unit, the water-cooled unit is in at least two modes of cooling mode, heating mode and self-circulation mode; in the event of a failure of the water-cooled unit, sending the fault information of the water-cooled unit. Self-checking can enable the water-cooled unit to quickly resume normal operation when it needs to work, thereby improving the overall reliability and stability of the energy storage system. Furthermore, the self-checking in the dormant state can detect whether the water-cooled unit is abnormal or damaged, and perform maintenance or replacement in time, so that the water-cooled unit can operate stably after waking up, reducing the risk of water-cooled unit shutdown, thereby improving the overall reliability and stability of the entire energy storage system.

[0072] Figure 1 FIG. 1 is a schematic diagram showing a partial structure of a battery device 10 according to an embodiment of the present application. Figure 1 As shown, the battery device 10 of the embodiment of the present application may include a plurality of battery cells 12 to meet different power requirements. The shape of the battery cell 12 of the embodiment of the present application may be set according to the actual application. For example, the battery cell 12 may be as follows: Figure 1 The cylindrical shape shown, or it can also be different from Figure 1 The rectangular parallelepiped or other shapes shown are not limited to the embodiments of the present application.

[0073] It should be understood that Figure 1As shown, the battery device 10 of the embodiment of the present application may further include a box body 11, which may be used to accommodate a plurality of battery cells 12. The interior of the box body 11 of the embodiment of the present application is a hollow structure, and a plurality of battery cells 12 are accommodated in the box body 11. The box body 11 may include two parts, which are respectively referred to as a first box body part 111 and a second box body part 112, and the first box body part 111 and the second box body part 112 are buckled together. The shapes of the first box body part 111 and the second box body part 112 may be determined according to the shapes of the components accommodated inside. For example, they may be determined according to the shape of the combination of the plurality of battery cells 12 accommodated inside. At least one of the first box body part 111 and the second box body part 112 has an opening. For example, as Figure 1 As shown, the first box body 111 and the second box body 112 can both be hollow cuboids and each have an open face, the opening of the first box body 111 and the opening of the second box body 112 are arranged opposite to each other, and the first box body 111 and the second box body 112 are buckled together to form a box body 11 with a closed chamber, which can be used to accommodate multiple battery cells 12. Multiple battery cells 12 are connected in parallel, in series, or in mixed combination and placed in the box body 11 formed by the first box body 111 and the second box body 112 buckled together.

[0074] For example, different from Figure 1 As shown, only one of the first box body 111 and the second box body 112 may be a hollow cuboid with an opening, while the other is in a plate shape to cover the opening. Taking the second box body 112 as a hollow cuboid with an opening and the first box body 111 as a plate, the first box body 111 covers the opening of the second box body 112 to form a box body 11 with a closed chamber, which can be used to accommodate multiple battery cells 12.

[0075] Figure 2 A schematic flow chart of a control method 200 for an energy storage system provided in an embodiment of the present application is shown.

[0076] According to some embodiments of the present application, Figure 2 As shown, the control method 200 of the energy storage system includes the following contents: S210: Determine that the water cooling unit is in a dormant state.

[0077] S220: performing periodic detection on the water cooling unit during the dormancy period of the water cooling unit, wherein during the periodic detection of the water cooling unit, the water cooling unit is in at least two modes of a cooling mode, a heating mode and a self-circulation mode.

[0078] S230: When a water cooling unit fails, send failure information of the water cooling unit.

[0079] Specifically, the execution body of the embodiment of the present method can be the water cooling controller 321 in the water cooling unit 320. It should be understood that the execution body of the embodiment of the present method can also be a controller arranged outside the water cooling unit 320 for controlling the water cooling unit 320. The following embodiments are all described by taking the water cooling controller 321 in the water cooling unit 320 as an example.

[0080] Figure 3 A module schematic diagram of an energy storage system 300 provided in an embodiment of the present application is shown.

[0081] Figure 4 A schematic flow chart of a control method 400 for an energy storage system provided in an embodiment of the present application is shown.

[0082] In the above S210, the water cooling controller 321 in the water cooling unit 320 determines that the water cooling unit 320 is in a dormant state. Specifically, Figure 3 and Figure 4 As shown, BMS330 sends management information to the water cooling controller 321 in the water cooling unit 320. For example, in the present application, the water cooling unit 320 in the energy storage system 300 has not been working for a long time. BMS330 obtains the sleep state and sleep time of the water cooling unit 320 and sends it to the water cooling controller 321, so that the water cooling controller 321 determines the sleep state of the water cooling unit 320.

[0083] The water cooling unit 320 being in a dormant state means that when the heat generation of the energy storage system 300 is low and the water cooling unit 320 does not need to run at full load, the water cooling unit 320 can enter a low-power operation mode, i.e., a dormant state, to save energy.

[0084] In addition, if Figure 3 and Figure 4 As shown, the battery device 10 is connected to the water cooling unit 320 through a water supply circuit. The water cooling unit 320 performs thermal management operations on the battery device 10 through the water supply circuit. The BMS 330 is used to send thermal management requirements or sleep state indications to the water cooling controller 321 of the water cooling unit 320 according to the needs of the battery device 10.

[0085] In the above S220, the water cooling controller 321 in the water cooling unit 320 determines that the water cooling unit 320 is in a dormant state. During the dormant state, the water cooling unit 320 is tested, which can also be called self-test, that is, the water cooling unit 320 detects whether its own components are faulty.

[0086] During the dormant period, the water cooling unit 320 is detected, including: during the dormant period, the water cooling unit 320 is periodically detected multiple times, wherein during the periodic detection of the water cooling unit 320, the water cooling unit 320 is in at least two modes of cooling mode, heating mode and self-circulation mode.

[0087] In which, during the periodic detection process of the water cooling unit 320, the water cooling unit 320 is in any two modes of cooling mode, heating mode and self-circulation mode, or can be in all three modes of cooling mode, heating mode and self-circulation mode.

[0088] Among them, taking the water cooling unit 320 being in cooling mode, heating mode and self-circulation mode as an example, the BMS330 obtains the sleep time of the water cooling unit 320, and sends the sleep time to the water cooling controller 321 of the water cooling unit 320. During the sleep time, the water cooling unit 320 is periodically detected in cooling mode, heating mode and self-circulation mode.

[0089] For example, the sleep time is 24 hours, the cooling mode, heating mode and self-circulation mode last for 2 minutes, 3 minutes and 3 minutes respectively. Within 24 hours, the cooling mode, heating mode and self-circulation mode can be periodically detected to more accurately detect whether the water cooling unit 320 has a fault.

[0090] Optionally, the water cooling unit 320 periodically performs cooling mode, heating mode and self-circulation mode detection during the dormant time. The cycle time can be set according to actual conditions, and this application does not impose any restrictions on this. The water cooling unit 320 can also perform multiple cooling mode, heating mode and self-circulation mode detections non-periodically during the dormant time.

[0091] Optionally, the water cooling unit 320 may perform cooling mode, heating mode and self-circulation mode detection only once during the sleep time, and may also detect whether the water cooling unit 320 fails while saving the power of the water cooling unit 320 .

[0092] Optionally, during multiple inspections of the water cooling unit 320, the BMS 330 sends thermal management requirements to the water cooling unit controller of the water cooling unit 320. At this time, the water cooling controller 321 stops self-inspection and starts the water cooling unit 320 to perform normal work, so that the water cooling unit 320 can meet normal thermal management requirements.

[0093] By performing multiple tests on the water cooling unit 320 during the dormancy period of the water cooling unit 320, the failure of the water cooling unit 320 can be detected more accurately, so that the water cooling unit 320 can operate stably after waking up, reducing the risk of the water cooling unit 320 shutting down, thereby improving the overall reliability and stability of the entire energy storage system 300. In addition, during the detection process, by sequentially testing the water cooling unit 320 in at least two of the cooling mode, heating mode, and self-circulation mode, it is possible to more accurately detect whether the water cooling unit 320 has a failure, thereby improving the self-test health of the water cooling unit 320.

[0094] In the above S230, the water cooling controller 321 in the water cooling unit 320 sends fault information of the water cooling unit 320 when the water cooling unit 320 fails, wherein the fault information includes temperature-related faults, such as the coolant temperature is too high or too low, the coolant flow is insufficient, etc.; pressure-related faults, such as the coolant pressure is too high or too low or the pressure of the cooling unit is unbalanced, etc.; water flow-related faults, such as water pump failure, etc.; electrical-related faults such as control circuit failure, etc., and the present application does not make any limitation on this.

[0095] It should be understood that when a fault occurs in the water cooling unit 320, the water cooling controller 321 in the water cooling unit 320 can send fault information of the water cooling unit 320 to the BMS 330, and the BMS 330 can send the fault information to the client, or send the fault information of the water cooling unit 320 to other controllers, and the controller can send the fault information to the client, and this application does not impose any limitation on this. The following embodiments are all described by taking sending the fault information of the water cooling unit 320 to the BMS 330 as an example.

[0096] Through the technical solution of the embodiment of the present application, the water-cooling controller 321 in the water-cooling unit 320 controls the water-cooling unit 320 to perform self-inspection during the dormancy of the water-cooling unit 320, and reports the fault information to the BMS330 when it is detected that the water-cooling unit 320 has a fault, so as to transmit the fault information to the client or the after-sales service, so as to facilitate the client to formulate early warning measures in advance, and the after-sales service can quickly respond to maintenance and improve customer satisfaction. In addition, the self-inspection can enable the water-cooling unit 320 to quickly resume normal operation when it needs to work, thereby improving the overall reliability and stability of the energy storage system 300. Furthermore, the self-inspection in the dormant state can detect whether the water-cooling unit 320 is abnormal or damaged, and perform maintenance or replacement in time, so that the water-cooling unit 320 can operate stably after waking up, reduce the risk of the water-cooling unit 320 shutting down, and thus improve the overall reliability and stability of the entire energy storage system 300.

[0097] According to some embodiments of the present application, Figure 4 As shown, the control method 400 of the energy storage system includes the following contents: S410: Receive data information sent by multiple sensors in the water cooling unit.

[0098] S420: Confirm the fault information according to the data information.

[0099] Specifically, the execution body of the embodiment of the present method can be the water cooling controller 321 in the water cooling unit 320. It should be understood that the execution body of the embodiment of the present method can also be a controller arranged outside the water cooling unit 320 for controlling the water cooling unit 320. The following embodiments are all described by taking the water cooling controller 321 in the water cooling unit 320 as an example.

[0100] In the above S410 and S420, the water cooling controller 321 in the water cooling unit 320 receives data information sent by multiple sensors in the water cooling unit 320, wherein the multiple sensors are respectively arranged near each component of the water cooling unit 320 to detect the coolant around each component. The sensor may be a temperature sensor and / or a pressure sensor to detect the temperature and / or pressure of the coolant near each component of the water cooling unit 320 and compare it with a preset value to obtain fault information.

[0101] Figure 5 A structural schematic diagram of another energy storage system 300 provided in an embodiment of the present application is shown.

[0102] Figure 6 A schematic flow chart of a control method 600 of an energy storage system provided in an embodiment of the present application is shown.

[0103] According to some embodiments of the present application, optionally, reference Figure 5 and Figure 6 The water cooling unit 320 includes a compressor 523, a heat exchanger 522, and a first pressure sensor 5261 disposed between the compressor 523 and the heat exchanger 522. Figure 6 As shown, the control method 600 of the energy storage system 300 includes the following contents: S610: Receive data information sent by a first pressure sensor, where the data information includes first pressure data.

[0104] S620: Determine first fault information included in the fault information according to the first pressure data, where the first fault information indicates that a heat exchanger fails.

[0105] Specifically, the execution body of the embodiment of the present method can be the water cooling controller 321 in the water cooling unit 320. It should be understood that the execution body of the embodiment of the present method can also be a controller arranged outside the water cooling unit 320 for controlling the water cooling unit 320. The following embodiments are all described by taking the water cooling controller 321 in the water cooling unit 320 as an example.

[0106] In the above S620, the water cooling controller 321 in the water cooling unit 320 can determine the first fault information included in the fault information based on the comparison between the first pressure data and the preset pressure data, and the first fault information indicates that the heat exchanger 522 has a fault.

[0107] Optionally, the water cooling controller 321 in the water cooling unit 320 can also determine the first fault information included in the fault information based on the first pressure data, and the first fault information indicates the specific parameters of the heat exchanger 522 that fails. For example, the first fault information is used to indicate the pressure value at which the heat exchanger 522 fails, or the difference between the pressure value and a preset value, etc. The present application does not impose any limitation on this.

[0108] Optional, you can refer to Figure 5 The energy storage system 300 includes a battery device 10 and a water cooling unit 320 , and the water cooling unit 320 includes a compressor 523 , a condenser 524 , a heat exchanger 522 , a heater 521 and an expansion valve 525 .

[0109] The compressor 523 is connected to the condenser 524, the condenser 524 is connected to the expansion valve 525, and then connected to the heat exchanger 522, and the expansion valve 525 is connected to the compressor 523 to form a circulation path; the heat exchanger 522 is connected to one end of the water pump, and the other end of the water pump is connected to the water supply pipe of the water supply circuit, and the water supply pipe is connected to the water inlet of the battery device 10. The water outlet of the battery device 10 is connected to the return pipe of the water supply circuit.

[0110] Optionally, the heater 521 may be a PTC heater 521 .

[0111] Optionally, the heat exchanger 522 may be a plate heat exchanger 522, referred to as a plate exchanger.

[0112] Figure 7 A schematic flow chart of a control method 700 of an energy storage system provided in an embodiment of the present application is shown.

[0113] According to some embodiments of the present application, the water cooling unit 320 further includes a compressor 523, a condenser 524 and a second pressure sensor 5262, and the second pressure sensor 5262 is disposed between the compressor 523 and the condenser 524. Figure 7 As shown, the control method 700 of the energy storage system 300 includes the following contents: S710: Receive data information sent by a second pressure sensor, where the data information includes second pressure data.

[0114] S720: Determine second fault information included in the fault information according to the pressure difference and the preset pressure data, the second fault information indicates that a compressor fault occurs, and the pressure difference is the difference between the second pressure data and the first pressure data.

[0115] Specifically, the execution body of the embodiment of the present method can be the water cooling controller 321 in the water cooling unit 320. It should be understood that the execution body of the embodiment of the present method can also be a controller arranged outside the water cooling unit 320 for controlling the water cooling unit 320. The following embodiments are all described by taking the water cooling controller 321 in the water cooling unit 320 as an example.

[0116] In the above S720, the water cooling controller 321 in the water cooling unit 320 can determine the second fault information included in the fault information based on the pressure difference and the preset pressure data, and the second fault information indicates that the compressor 523 has a fault, wherein the pressure difference is the difference between the second pressure data and the first pressure data, and the data information also includes the second pressure data.

[0117] Similar to S620, the second fault information may indicate specific parameters of the heat exchanger 522 having a fault, which is not illustrated in the embodiment of the present application.

[0118] Figure 8 A schematic flow chart of a control method 800 of an energy storage system 300 provided in an embodiment of the present application is shown.

[0119] According to some embodiments of the present application, the water cooling unit 320 may further include an expansion valve 525 and a first temperature sensor 5263 disposed near the expansion valve 525. Figure 8 As shown, the control method 800 of the energy storage system 300 includes the following contents: S810: Receive data information sent by a first temperature sensor, where the data information includes first temperature data.

[0120] S820: Determine, based on the first temperature data, third fault information included in the fault information, where the third fault information indicates that a fault occurs in the expansion valve.

[0121] Specifically, the execution body of the embodiment of the present method can be the water cooling controller 321 in the water cooling unit 320. It should be understood that the execution body of the embodiment of the present method can also be a controller arranged outside the water cooling unit 320 for controlling the water cooling unit 320. The following embodiments are all described by taking the water cooling controller 321 in the water cooling unit 320 as an example.

[0122] Similar to the description in S720, this application will not repeat it here.

[0123] Fig. 9A schematic flow chart of a control method 900 of an energy storage system 300 provided in an embodiment of the present application is shown.

[0124] According to some embodiments of the present application, optionally, the energy storage system 300 further includes a battery device 10 and a third pressure sensor 5264, the battery device 10 and the water cooling unit 320 are connected via a water supply circuit, and the third pressure sensor 5264 is disposed in the water supply circuit. Fig. 9 As shown, the control method 900 of the energy storage system 300 includes the following contents: S910: Receive data information sent by a third pressure sensor, where the data information includes third pressure data.

[0125] S920: Determine fourth fault information included in the fault information according to the third pressure data, where the fourth fault information indicates that any component of the water cooling unit fails.

[0126] Specifically, the execution body of the embodiment of the present method can be the water cooling controller 321 in the water cooling unit 320. It should be understood that the execution body of the embodiment of the present method can also be a controller arranged outside the water cooling unit 320 for controlling the water cooling unit 320. The following embodiments are all described by taking the water cooling controller 321 in the water cooling unit 320 as an example.

[0127] Similar to the description in S720, this application will not repeat it here.

[0128] It should be understood that by setting the third pressure sensor 5264 in the water supply circuit, it is possible to detect whether the water cooling unit 320 is faulty. Although it is not possible to detect which specific component is faulty, it is possible to obtain general fault information and perform inspections and repairs one by one.

[0129] Fig.10 A schematic flow chart of a control method 1000 for an energy storage system provided in an embodiment of the present application is shown.

[0130] According to some embodiments of the present application, the energy storage system 300 may further include a second temperature sensor 5265, which is disposed in the water supply circuit. Fig.10 As shown, the control method 1000 of the energy storage system 300 includes the following contents: S1010: Receive data information sent by a second temperature sensor, where the data information includes second temperature data.

[0131] S1020: Determine fifth fault information included in the fault information according to the second temperature data, where the fifth fault information indicates that any component of the water cooling unit fails.

[0132] Specifically, the execution body of the embodiment of the present method can be the water cooling controller 321 in the water cooling unit 320. It should be understood that the execution body of the embodiment of the present method can also be a controller arranged outside the water cooling unit 320 for controlling the water cooling unit 320. The following embodiments are all described by taking the water cooling controller 321 in the water cooling unit 320 as an example.

[0133] Similar to the description in S720, this application will not repeat it here.

[0134] It should be understood that by setting the second temperature sensor 5265 in the water supply circuit, it is possible to detect whether the water cooling unit 320 is faulty. Although it is not possible to detect which specific component is faulty, it is possible to obtain general fault information and perform inspections and repairs one by one.

[0135] Among them, the energy storage system 300 has a cooling mode requirement and a target water temperature for the water cooling unit 320. Temperature sensors are designed at the inlet and outlet of the water cooling unit 320 to monitor the real-time water temperature. The compressor 523 in the system will adjust the operating frequency of the compressor 523 in real time according to the deviation between the target water temperature and the outlet water temperature. When the outlet water temperature is higher than the target water temperature, the cooling capacity of the energy storage system 300 cannot meet the target water temperature. At this time, the compressor 523 will increase the frequency and increase the cooling power. When the outlet water temperature is lower than the target water temperature, the system cooling capacity is higher. At this time, the compressor 523 will reduce the operating frequency, reduce the cooling power, and reduce the power consumption of the auxiliary source.

[0136] Fig.11 A schematic flow chart of a control method 1100 of an energy storage system 300 provided in an embodiment of the present application is shown.

[0137] like Fig.11 As shown, the control method 1100 of the energy storage system includes the following contents: S1110: Receive thermal management requirements sent by the battery management system.

[0138] S1120: Test the water cooling unit according to thermal management requirements.

[0139] S1130: When a water cooling unit fails, send failure information of the water cooling unit.

[0140] In the embodiment of the present application, when the thermal management requirement sent by BMS330 is received, that is, when cooling or heating is required, the water cooling unit 320 is detected. In this detection, only the corresponding detection is performed according to the thermal management requirement. For example, if cooling is required during the thermal management requirement, the detection is performed during the cooling process of the water cooling unit 320, and the fault information of the water cooling unit 320 is obtained and reported to BMS330.

[0141] Optionally, in an embodiment of the present application, a sensor may be placed at any position in the water cooling unit 320 for detection to obtain data information to detect whether the water cooling unit 320 has a fault. In addition, in an embodiment of the present application, other data acquisition tools other than sensors may also be used for acquisition, such as gyroscopes, ultrasonic sensors, etc., and the present application does not impose any restrictions on this. Optionally, combine the following Figure 5 The cooling mode, heating mode and self-circulation mode of the water cooling unit 320 are described in detail.

[0142] When the battery device 10 needs to be cooled, the high-temperature and high-pressure gas refrigerant discharged by the compressor 523 is converted into medium-temperature and high-pressure refrigerant through the condenser 524. The heat of the refrigerant is dissipated to the environment. The refrigerant enters the expansion valve 525 and becomes a low-temperature and low-pressure two-phase flow refrigerant. Then it enters the plate exchanger to evaporate and absorb heat. The refrigerant exchanges heat with the high-temperature coolant returned from the battery device 10. The refrigerant becomes a low-temperature and low-pressure superheated gas and enters the compressor 523 for recirculation. The coolant loop cools the coolant through the plate exchanger and enters the battery device 10 through the water pump to absorb heat, taking out the heat of the battery inside the battery device 10. The high-temperature coolant enters the plate exchanger again to release heat.

[0143] When the battery device 10 needs to be heated, the temperature of the heater 521 rises after heating, and the high-temperature coolant enters the battery device 10 to release heat. After the coolant releases heat, the temperature drops and enters the heater 521 again for heating, and a secondary cycle is performed. At this time, the refrigerant circuit components such as the compressor 523 do not operate. The expansion valve 525 connected to the return pipe can be used to store excess coolant.

[0144] According to some embodiments of the present application, optionally, the self-circulation mode is a mode in which the cooling medium circulates in the water supply loop when the water cooling unit 320 is in a dormant state. It should be understood that in the self-circulation mode, the cooling medium does not pass through the water cooling unit, but only flows in the water supply loop and the battery device 10. The water-cooling medium is the same as the coolant described in the embodiments of the present application.

[0145] Optionally, the water cooling controller 321 may communicate with the BMS 330 to implement cooling and heating based on the thermal management requirements submitted by the BMS 330 , so as to control the operation mode of the water cooling unit 320 based on actual cooling and heating requirements.

[0146] According to some embodiments of the present application, the present application also provides an energy storage system, including: a water cooling unit, the water cooling unit including a water cooling control unit, the water cooling control unit is used to determine that the water cooling unit is in a dormant state; during the dormant period of the water cooling unit, the water cooling unit is periodically detected, wherein during the periodic detection of the water cooling unit, the water cooling unit is in at least two modes of cooling mode, heating mode and self-circulation mode; in the event of a failure of the water cooling unit, the failure information of the water cooling unit is sent to the battery management system.

[0147] According to some embodiments of the present application, optionally, the water cooling unit also includes a compressor, a heat exchanger, a condenser and an expansion valve, and the compressor, the heat exchanger, the condenser and the expansion valve are connected and connected to the battery device through a water supply circuit.

[0148] According to some embodiments of the present application, optionally, the water cooling unit also includes: a first pressure sensor, arranged between the compressor and the heat exchanger, for obtaining first pressure data; a second pressure sensor, arranged between the compressor and the condenser, for obtaining second pressure data; a third pressure sensor, located in the water supply circuit, for obtaining third pressure data; a first temperature sensor, arranged close to the expansion valve, for obtaining first temperature data; a second temperature sensor, arranged in the water supply circuit, for obtaining second temperature data.

[0149] According to some embodiments of the present application, the present application also provides a control device for an energy storage system, the energy storage system includes a water cooling unit, and the control device includes a determination unit and a processing unit.

[0150] The determination unit is used to determine whether the water cooling unit is in a dormant state.

[0151] The processing unit is used to perform periodic detection on the water-cooling unit during the dormancy period of the water-cooling unit, wherein during the periodic detection of the water-cooling unit, the water-cooling unit is in at least two modes of cooling mode, heating mode and self-circulation mode; the processing unit is also used to send fault information of the water-cooling unit to the battery management system when a fault occurs in the water-cooling unit.

[0152] According to some embodiments of the present application, the present application also provides a control device for an energy storage system, comprising: a processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute: such as a control method for an energy storage system according to any of the above-mentioned schemes.

[0153] According to some embodiments of the present application, the present application further provides an energy storage system, including: a water cooling unit, the water cooling unit is used to execute the control method for the energy storage system as described above for executing any of the above schemes.

[0154] According to some embodiments of the present application, the present application also provides a chip, including: a processor, used to call and run a computer program from a memory, so that a device equipped with the chip executes a control method for an energy storage system for executing any of the above-mentioned solutions.

[0155] According to some embodiments of the present application, the present application also provides a computer-readable storage medium, including: a computer program is stored on the computer-readable storage medium, and when the computer program runs on a computer, the computer executes a control method for an energy storage system for executing any of the above-mentioned schemes.

[0156] According to some embodiments of the present application, the present application further provides a computer program product, which includes instructions for executing a control method for an energy storage system of any of the above solutions.

[0157] According to some embodiments of the present application, see Figures 2 to 5 The present application provides a control method for an energy storage system 300, wherein the energy storage system 300 includes a water cooling unit 320, and the control method includes: determining that the water cooling unit 320 is in a dormant state; during the dormant period of the water cooling unit 320, periodically detecting the water cooling unit 320, wherein during the periodic detection of the water cooling unit 320, the water cooling unit 320 is in at least two modes of a cooling mode, a heating mode, and a self-circulation mode; in the case of a failure of the water cooling unit 320, the fault information of the water cooling unit 320 is sent to the BMS 330. The water cooling unit 320 can quickly resume normal operation when it needs to work, thereby improving the overall reliability and stability of the energy storage system 300. Furthermore, the self-check in the dormant state can detect whether the water cooling unit 320 is abnormal or damaged, and perform maintenance or replacement in time, so that the water cooling unit 320 can operate stably after waking up, reducing the risk of the water cooling unit 320 shutting down, thereby improving the overall reliability and stability of the entire energy storage system 300.

[0158] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A control method for an energy storage system, characterized in that: The energy storage system includes a water cooling unit, and the control method includes: Determining that the water cooling unit is in a dormant state; During the dormancy period of the water cooling unit, the water cooling unit is periodically detected, wherein during the periodic detection of the water cooling unit, the water cooling unit is in at least two modes of a cooling mode, a heating mode and a self-circulation mode; When the water cooling unit fails, the failure information of the water cooling unit is sent.

2. The control method according to claim 1, characterized in that: The control method further comprises: Receiving data information sent by multiple sensors in the water cooling unit; The fault information is confirmed according to the data information.

3. The control method according to claim 2, characterized in that: The water cooling unit includes a compressor, a heat exchanger, and a first pressure sensor disposed between the compressor and the heat exchanger. receiving data information sent by the first pressure sensor, wherein the data information includes first pressure data; First fault information included in the fault information is determined according to the first pressure data, where the first fault information indicates that a fault occurs in the heat exchanger.

4. The control method according to claim 3, characterized in that: The water cooling unit further includes a compressor, a condenser and a second pressure sensor, wherein the second pressure sensor is arranged between the compressor and the condenser. receiving data information sent by the second pressure sensor, wherein the data information includes second pressure data; According to the pressure difference and the preset pressure data, second fault information included in the fault information is determined, the second fault information indicates that the compressor fails, and the pressure difference is the difference between the second pressure data and the first pressure data.

5. The control method according to claim 2, characterized in that: The water cooling unit further includes an expansion valve and a first temperature sensor disposed near the expansion valve. receiving data information sent by the first temperature sensor, wherein the data information includes first temperature data; According to the first temperature data, third fault information included in the fault information is determined, and the third fault information indicates that a fault occurs in the expansion valve.

6. The control method according to any one of claims 1 to 5, characterized in that: The energy storage system further includes a battery device and a third pressure sensor. The battery device and the water cooling unit are connected via a water supply circuit. The third pressure sensor is arranged in the water supply circuit. The control method further comprises: receiving data information sent by the third pressure sensor, wherein the data information includes third pressure data; Fourth fault information included in the fault information is determined according to the third pressure data, and the fourth fault information indicates that any component of the water cooling unit fails.

7. The control method according to claim 6, characterized in that: The energy storage system further includes a second temperature sensor, which is disposed in the water supply circuit. The control method further comprises: receiving data information sent by the second temperature sensor, wherein the data information includes second temperature data; According to the second temperature data, fifth fault information included in the fault information is determined, and the fifth fault information indicates that any component of the water cooling unit fails.

8. The control method according to any one of claims 1 to 5, characterized in that: The control method further comprises: Receive thermal management requirements sent by the battery management system; According to the thermal management requirements, the water cooling unit is tested; When the water cooling unit fails, the failure information of the water cooling unit is sent.

9. The control method according to any one of claims 1 to 5, characterized in that: The self-circulation mode is a mode in which the cooling medium circulates in the water supply circuit when the water cooling unit is in a dormant state.

10. An energy storage system, characterized in that: include: A water cooling unit, the water cooling unit comprising a water cooling control unit, The water cooling control unit is used to determine that the water cooling unit is in a dormant state; During the dormancy period of the water cooling unit, the water cooling unit is periodically inspected, wherein during the periodic inspection of the water cooling unit, the water cooling unit is in at least two modes of cooling mode, heating mode and self-circulation mode; in the event of a failure of the water cooling unit, the failure information of the water cooling unit is sent to a battery management system.

11. A control device for an energy storage system, characterized in that: The energy storage system includes a water cooling unit, The control device comprises a determination unit and a processing unit, The determining unit is used to determine that the water cooling unit is in a dormant state; The processing unit is used to perform periodic detection on the water cooling unit during the dormancy period of the water cooling unit, wherein during the periodic detection of the water cooling unit, the water cooling unit is in at least two modes of cooling mode, heating mode and self-circulation mode; The processing unit is further used to send fault information of the water cooling unit to the battery management system when a fault occurs to the water cooling unit.

12. A control device for an energy storage system, characterized in that: include: A processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute: a control method for an energy storage system as claimed in any one of claims 1 to 9.

13. An energy storage system, characterized in that: include: A water cooling unit, wherein the water cooling unit is used to execute the control method of the energy storage system as described in any one of claims 1 to 9 above.

14. A chip, characterized in that: include: A processor, used to call and run a computer program from a memory so that a device equipped with the chip executes a control method for an energy storage system as claimed in any one of claims 1 to 9.

15. A computer-readable storage medium, characterized in that: include: The computer-readable storage medium stores a computer program, and when the computer program is executed on a computer, the computer is enabled to execute the control method of the energy storage system according to any one of claims 1 to 9.

16. A computer program product, characterized in that The computer program product comprises instructions for executing the control method of the energy storage system according to any one of claims 1 to 9.

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