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

Abstract

The embodiment of the application provides a kind of control method, device, energy storage system, chip, medium and program product of energy storage system, and energy storage system includes water cooling unit, control method includes: determine that water cooling unit is in dormant state;During the dormancy of water cooling unit, periodically detect water cooling unit, wherein, during the periodic detection of water cooling unit, water cooling unit is in at least two modes of refrigeration mode, heating mode and self-circulation mode;In the case where water cooling unit fails, send the fault information of water cooling unit.Make water cooling unit can be stable after wake-up Run, reduce the risk of water cooling unit shutdown, and then improve the reliability and stability of the whole energy storage system.

Description

Technical Field

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

[0002] Against the backdrop of increased global support for the development of new energy technologies, various energy storage-related technologies have been widely applied. To meet the demands of large-capacity energy storage devices, management is required through water-cooled chillers within these devices. Therefore, how to effectively manage the water-cooled chillers in energy storage devices is a pressing issue that needs to be addressed. Summary of the Invention

[0003] This application provides a control method, device, energy storage system, chip, medium, and program product for an energy storage system, enabling the water-cooled unit to operate stably after being woken up, reducing the risk of water-cooled unit shutdown, and thereby improving the overall reliability and stability of the entire energy storage system.

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

[0005] In the technical solution of this application embodiment, the water-cooling controller in the water-cooled unit controls the water-cooled unit to perform self-checks during the water-cooled unit's dormancy period. If a fault is detected, the controller reports the fault information to the client or after-sales service, facilitating the client's advance warning measures and enabling rapid after-sales response for maintenance, thus improving customer satisfaction. Furthermore, the self-check allows the water-cooled unit to quickly resume normal operation when needed, improving the overall reliability and stability of the energy storage system. Further, the self-check during dormancy can detect any abnormalities or damage to the water-cooled unit, allowing for timely maintenance or replacement, ensuring stable operation after waking up, reducing the risk of water-cooled unit downtime, and thus improving the overall reliability and stability of the entire energy storage system. Additionally, by periodically checking the water-cooled unit during its dormancy period, faults can be detected more accurately, ensuring stable operation after waking up, reducing the risk of water-cooled unit downtime, and further improving the overall reliability and stability of the entire energy storage system. In addition, during the testing process, the water-cooled unit is tested in at least two of the following modes in sequence: cooling mode, heating mode, and self-circulation mode, in order to more accurately detect whether the water-cooled unit has malfunctioned and improve the self-test health of the water-cooled unit.

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

[0007] In the technical solution of this application embodiment, during the detection process of the water-cooled unit, data information sent by multiple sensors in the water-cooled unit is received to accurately determine the fault information of each component in the water-cooled unit, improve the self-test health of the water-cooled unit, enable the water-cooled unit to operate stably after being woken up, reduce the risk of water-cooled unit shutdown, and thus improve the overall reliability and stability of the entire energy storage system.

[0008] In some embodiments, the water-cooled unit includes a compressor, a heat exchanger, and a first pressure sensor located between the compressor and the heat exchanger. The control method further includes: receiving data information sent by the first pressure sensor, the data information including first pressure data; and determining, based on the first pressure data, first fault information including fault information, the first fault information indicating that the heat exchanger has failed.

[0009] In the technical solution of this application embodiment, by setting a first pressure sensor between the heat exchanger and the compressor, the first pressure data of the coolant passing through the heat exchanger is detected, thereby determining whether the heat exchanger in the water-cooled unit has malfunctioned. Through this process, the self-test in the dormant state can detect whether there is any abnormality or damage in the water-cooled unit, and timely maintenance or replacement can be carried out, so that the water-cooled unit can operate stably after being woken up, reducing the risk of water-cooled unit shutdown, thereby improving the overall reliability and stability of the entire energy storage system.

[0010] In some embodiments, the water-cooled unit further includes a compressor, a condenser, and a second pressure sensor, wherein the second pressure sensor is disposed between the compressor and the condenser, and the control method further includes: receiving data information sent by the second pressure sensor, wherein the data information includes the second pressure data; determining second fault information including fault information based on the pressure difference and preset pressure data, wherein the second fault information indicates that the compressor has malfunctioned, and the pressure difference is the difference between the second pressure data and the first pressure data.

[0011] In the technical solution of this application embodiment, by setting a second pressure sensor between the compressor and the condenser, the second pressure data of the coolant passing through the compressor is detected, thereby determining whether the compressor in the water-cooled unit has malfunctioned. Through this process, the self-test in the dormant state can detect whether there is any abnormality or damage in the water-cooled unit, and timely maintenance or replacement can be carried out, so that the water-cooled unit can operate stably after being woken up, reducing the risk of water-cooled unit shutdown, thereby improving the overall reliability and stability of the entire energy storage system.

[0012] In some embodiments, the water-cooled unit further includes an expansion valve and a first temperature sensor disposed near the expansion valve, and the control method further includes: receiving data information sent by the first temperature sensor, the data information including first temperature data; and determining third fault information including fault information based on the first temperature data, the third fault information indicating that the expansion valve has malfunctioned.

[0013] In the technical solution of this application embodiment, by setting a first temperature sensor near the expansion valve, the first temperature data of the coolant passing through the expansion valve is detected, thereby determining whether the expansion valve in the water-cooled unit has malfunctioned. Through this process, the self-test in the dormant state can detect whether there is any abnormality or damage in the water-cooled unit, and timely maintenance or replacement can be carried out, so that the water-cooled unit can operate stably after being woken up, reducing the risk of water-cooled unit shutdown, thereby improving the overall reliability and stability of the entire energy storage system.

[0014] In some embodiments, the energy storage system further includes a battery device and a third pressure sensor, the battery device and the water-cooled unit are connected via a water supply circuit, the third pressure sensor is disposed in the water supply circuit, and the control method further includes: receiving data information transmitted by the third pressure sensor, the data information including third pressure data; and determining fourth fault information including fault information based on the third pressure data, the fourth fault information indicating that any component of the water-cooled unit has failed.

[0015] In the technical solution of this application embodiment, by setting a third pressure sensor in the water supply circuit, the third pressure data of the coolant passing through the water supply circuit is detected, thereby determining whether the water supply circuit in the water-cooled unit has failed, that is, determining whether the water-cooled unit has failed. Through this process, the self-test in the dormant state can detect whether the water-cooled unit has any abnormalities or damage, and timely maintenance or replacement can be carried out, so that the water-cooled unit can operate stably after being woken up, reducing the risk of water-cooled unit shutdown, thereby improving the overall reliability and stability of the entire energy storage system.

[0016] In some embodiments, the energy storage system further includes a second temperature sensor disposed in the water supply circuit, receiving data information transmitted by the second temperature sensor, the data information including second temperature data; and determining a fifth fault information including fault information based on the second temperature data, the fifth fault information indicating that any component of the water-cooled unit has failed.

[0017] In the technical solution of this application embodiment, by setting a second temperature sensor in the water supply circuit, the second temperature data of the coolant passing through the water supply circuit is detected, thereby determining whether the water supply circuit in the water-cooled unit has failed, that is, determining whether the water-cooled unit has failed. Through this process, the self-test in the dormant state can detect whether there is any abnormality or damage in the water-cooled unit, and timely maintenance or replacement can be carried out, so that the water-cooled unit can operate stably after being woken up, reducing the risk of water-cooled unit shutdown, 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; detecting the water-cooled unit according to the thermal management requirements; and sending fault information of the water-cooled unit in the event of a fault in the water-cooled unit.

[0019] In the technical solution of this application embodiment, the thermal management requirements sent by the battery management system are received, such as cooling or heating. During normal operation, the water-cooled unit is detected to check for malfunctions. By detecting abnormalities or damage to the water-cooled unit under normal operating conditions, timely maintenance or replacement is performed, so that the water-cooled unit can operate stably after being woken up, reducing the risk of water-cooled unit shutdown, 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 circuit when the water-cooled unit is in a dormant state.

[0021] Secondly, this application provides an energy storage system, including: a water-cooled unit, the water-cooled unit including a water-cooled control unit, the water-cooled control unit being used to determine 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 among cooling mode, heating mode and self-circulation mode; and in the event of a failure of the water-cooled unit, sending fault information of the water-cooled unit to the battery management system.

[0022] In the technical solution of this application embodiment, the water-cooling controller in the water-cooled unit controls the water-cooled unit to perform a self-test during the water-cooled unit's dormancy period. If a fault is detected in the water-cooled unit, the controller reports the fault information to the battery management system, transmitting the fault information to the customer or after-sales service provider. This allows the customer to formulate early warning measures in advance, and the after-sales service provider to respond quickly for maintenance, improving customer satisfaction. Furthermore, the self-test enables the water-cooled unit to quickly resume normal operation when needed, improving the overall reliability and stability of the energy storage system. Moreover, the self-test during dormancy can detect any abnormalities or damage to the water-cooled unit, allowing for timely maintenance or replacement. This ensures stable operation of the water-cooled unit after it is awakened, reducing the risk of water-cooled unit downtime and thus improving the overall reliability and stability of the entire energy storage system.

[0023] Thirdly, this application provides a control device for an energy storage system, the energy storage system including a water-cooled unit, the control device including a determining unit and a processing unit, the determining unit being used to determine that the water-cooled unit is in a dormant state; the processing unit being used to periodically detect the water-cooled unit during the dormant period, wherein during the periodic detection of the water-cooled unit, the water-cooled unit is in at least two modes among cooling mode, heating mode and self-circulation mode; the processing unit is also used to send fault information of the water-cooled unit to the battery management system in the event of a fault in the water-cooled unit.

[0024] Fourthly, this 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, and the processor being used to call and run the computer program stored in the memory to execute: the control method of the energy storage system as described in any of the first aspects.

[0025] Fifthly, this application provides an energy storage system, including: a water-cooled unit, the water-cooled unit being used to perform a control method for the energy storage system as described in any of the first aspects above.

[0026] In a sixth aspect, this application provides a chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform a control method for an energy storage system as described in any of the first aspects.

[0027] In a seventh aspect, this application provides a computer-readable storage medium, comprising: a computer program stored on the computer-readable storage medium, which, when run on a computer, causes the computer to perform a control method for an energy storage system as described in any of the first aspects.

[0028] Eighthly, this application provides a computer program product including instructions for performing a control method for an energy storage system as described in any of the first aspects. Attached Figure Description

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

[0030] Figure 2 A schematic flowchart of a control method for an energy storage system provided in an embodiment of this application is shown.

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

[0032] Figure 4 A schematic flowchart of a control method for an energy storage system provided in an embodiment of this application is shown.

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

[0034] Figure 6 A schematic flowchart of a control method for an energy storage system provided in an embodiment of this application is shown.

[0035] Figure 7 A schematic flowchart of a control method for an energy storage system provided in an embodiment of this application is shown.

[0036] Figure 8 A schematic flowchart of a control method for an energy storage system provided in an embodiment of this application is shown.

[0037] Figure 9 A schematic flowchart of a control method for an energy storage system provided in an embodiment of this application is shown.

[0038] Figure 10 A schematic flowchart of a control method for an energy storage system provided in an embodiment of this application is shown.

[0039] Figure 11 A schematic flowchart of a control method for an energy storage system provided in an embodiment of this application is shown.

[0040] Reference numerals: Battery device 10, battery cell 12, first housing 111, second housing 112, water-cooled unit 320, water-cooled controller 321, BMS 330, 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 Implementation

[0041] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this 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 commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, rather than to describe a specific order or hierarchy.

[0043] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

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

[0045] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0046] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0047] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0048] Unless otherwise specified, all steps of this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0049] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0050] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0051] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0052] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0053] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0054] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0055] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0056] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0057] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0058] This application provides an energy storage device including one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices, which are connected in series via a busbar 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] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[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 housed within the cabinet.

[0062] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central 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 supplies coolant to each battery device via piping to regulate the temperature of the individual battery cells.

[0064] As an example, the main control module can serve as the battery management unit for the battery cluster, used 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 instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0065] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an Insulation Monitoring Module (IMM), a Master Battery Management Unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0066] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0067] As an example, the power distribution unit can 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, the power conversion device being connected between the power generation device and the energy storage device. The power generation device generates electrical energy, which can be stored in the energy storage device through the power conversion device. As examples, the power generation device may specifically be a solar panel, hydroelectric power generation equipment, thermal power generation equipment, wind power generation equipment, etc. The specific type of power generation device is not limited in this application.

[0069] Energy storage systems, especially large-scale battery energy storage systems, generate a significant amount of heat during charging and discharging. If this heat cannot be dissipated effectively and promptly, it will cause the battery temperature to rise, thereby affecting battery performance and safety. Therefore, water-cooled units are an indispensable component to ensure the stability and safety of energy storage systems. Water-cooled units absorb heat from the energy storage system through circulating coolant and transfer 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 malfunctions during operation, the water-cooling controller within the unit will report the fault information to the Battery Management System (BMS), which will then report it to the terminal equipment to remind the user to perform maintenance. However, even if the water-cooled unit has been idle for an extended period, fault detection is still required. This allows the unit to report fault information to the BMS even when not in operation, enabling timely maintenance or replacement. This ensures stable operation after the water-cooled unit is reactivated, reducing the risk of downtime and ultimately improving the overall reliability and stability of the entire energy storage system.

[0071] Based on the above considerations, to mitigate the risk of water-cooled unit downtime, this application proposes a control method for an energy storage system, including a water-cooled unit. The control method includes: determining that the water-cooled unit is in a dormant state; performing periodic checks on the water-cooled unit during its dormant period, wherein during these periodic checks, the water-cooled unit operates in at least two of the following modes: cooling mode, heating mode, and self-circulation mode; and sending fault information to the water-cooled unit in the event of a fault. Self-checking allows the water-cooled unit to quickly resume normal operation when needed, improving the overall reliability and stability of the energy storage system. Furthermore, self-checking during dormancy can detect any abnormalities or damage to the water-cooled unit, allowing for timely maintenance or replacement, ensuring stable operation after the water-cooled unit is awakened, reducing the risk of downtime, and thus improving the overall reliability and stability of the entire energy storage system.

[0072] Figure 1 A partial structural schematic diagram of the battery device 10 according to an embodiment of this application is shown. Figure 1 As shown, the battery device 10 of this application embodiment may include a plurality of battery cells 12 to meet different power usage requirements. The shape of the battery cell 12 in this application embodiment can be set according to actual application. For example, the battery cell 12 can be as follows: Figure 1 The cylindrical shape shown, or it could be different. Figure 1 The embodiments shown may be cuboids or other shapes, but are not limited to these.

[0073] It should be understood that, such as Figure 1As shown, the battery device 10 of this embodiment may further include a housing 11, which can be used to accommodate multiple battery cells 12. The housing 11 of this embodiment has a hollow interior, and the multiple battery cells 12 are accommodated within the housing 11. The housing 11 may include two parts, referred to herein as a first housing portion 111 and a second housing portion 112, which are fastened together. The shapes of the first housing portion 111 and the second housing portion 112 can be determined according to the shape of the components housed inside, for example, according to the shape of the combination of the multiple battery cells 12 housed inside. At least one of the first housing portion 111 and the second housing portion 112 has an opening. For example, as... Figure 1 As shown, the first housing portion 111 and the second housing portion 112 can both be hollow cuboids with one open side each. The openings of the first housing portion 111 and the second housing portion 112 are opposite to each other, and the first housing portion 111 and the second housing portion 112 are interlocked to form a housing 11 with a closed chamber, which can be used to accommodate multiple battery cells 12. The multiple battery cells 12 are connected in parallel, series, or mixed and placed inside the housing 11 formed by the interlocking of the first housing portion 111 and the second housing portion 112.

[0074] For example, unlike Figure 1 As shown, either the first housing portion 111 or the second housing portion 112 may have only one hollow cuboid with an opening, while the other is plate-shaped to cover the opening. Taking the second housing portion 112 as a hollow cuboid with one opening, and the first housing portion 111 as a plate-shaped example, then the first housing portion 111 covers the opening of the second housing portion 112 to form a housing 11 with a closed chamber, which can be used to accommodate multiple battery cells 12.

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

[0076] According to some embodiments of this application, such as Figure 2 As shown, the control method 200 for the energy storage system includes the following:

[0077] S210: Confirm that the water-cooled unit is in a dormant state.

[0078] S220: During the dormancy period of the water-cooled unit, the water-cooled unit is periodically tested. During the periodic testing of the water-cooled unit, the water-cooled unit is in at least two of the following modes: cooling mode, heating mode, and self-circulation mode.

[0079] S230: In the event of a malfunction in the water-cooled unit, send fault information about the water-cooled unit.

[0080] Specifically, the execution subject of this method embodiment can be the water-cooling controller 321 in the water-cooled unit 320. It should be understood that the execution subject of this method embodiment can also be a controller set outside the water-cooled unit 320 for controlling the water-cooled unit 320. The following embodiments all take the water-cooling controller 321 in the water-cooled unit 320 as an example for description.

[0081] Figure 3 A schematic diagram of a module of an energy storage system 300 provided in an embodiment of this application is shown.

[0082] Figure 4 A schematic flowchart of a control method 400 for an energy storage system provided in an embodiment of this application is shown.

[0083] In the above S210, the water-cooling controller 321 in the water-cooled unit 320 determines that the water-cooled unit 320 is in a dormant state. Specifically, as shown in... Figure 3 and Figure 4 As shown, BMS330 sends management information to the water-cooled controller 321 in the water-cooled unit 320. For example, in this application, if the water-cooled unit 320 in the energy storage system 300 has not been working for a long time, BMS330 obtains the hibernation state and hibernation time of the water-cooled unit 320 and sends it to the water-cooled controller 321, so that the water-cooled controller 321 can determine the hibernation state of the water-cooled unit 320.

[0084] The water-cooled unit 320 being in a dormant state means that when the heat generated by the energy storage system 300 is low and the water-cooled unit 320 does not need to run at full load, the water-cooled unit 320 can enter a low-power operation mode, namely a dormant state, to save energy.

[0085] In addition, such as Figure 3 and Figure 4 As shown, the battery device 10 is connected to the water-cooled unit 320 through a water supply circuit. The water-cooled 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-cooled controller 321 of the water-cooled unit 320 according to the needs of the battery device 10.

[0086] In the above S220, the water-cooled controller 321 in the water-cooled unit 320 determines that the water-cooled unit 320 is in a dormant state. During the dormant period, the water-cooled unit 320 performs a test, which can also be called a self-test, that is, the water-cooled unit 320 detects whether its own components have malfunctioned.

[0087] During the hibernation period, the water-cooled unit 320 is tested, including: during the hibernation period, the water-cooled unit 320 is tested periodically multiple times, wherein during the periodic testing of the water-cooled unit 320, the water-cooled unit 320 is in at least two of the following modes: cooling mode, heating mode and self-circulation mode.

[0088] During the periodic testing of the water-cooled unit 320, the water-cooled unit 320 can be in any two of the following modes: cooling mode, heating mode, and self-circulation mode, or it can be in all three modes: cooling mode, heating mode, and self-circulation mode.

[0089] Taking the water chiller unit 320 in three modes—cooling mode, heating mode, and self-circulation mode—as an example, the BMS330 obtains the sleep time of the water chiller unit 320 and sends the sleep time to the water cooling controller 321 of the water chiller unit 320. During the sleep time, the BMS330 performs periodic detection of the water chiller unit 320 in cooling mode, heating mode, and self-circulation mode.

[0090] For example, the sleep time is 24 hours, and the cooling mode, heating mode and self-circulation mode last for 2 minutes, 3 minutes and 3 minutes respectively. During the 24 hours, the cooling mode, heating mode and self-circulation mode can be periodically checked to more accurately detect whether the water-cooled unit 320 has malfunctioned.

[0091] Optionally, during its sleep period, the water-cooled unit 320 periodically checks its cooling mode, heating mode, and self-circulation mode. The cycle time can be set according to actual conditions, and this application does not impose any limitations on this. During its sleep period, the water-cooled unit 320 may also perform multiple non-periodic checks of its cooling mode, heating mode, and self-circulation mode.

[0092] Optionally, the water chiller unit 320 can perform a single test of cooling mode, heating mode, and self-circulation mode during its sleep period. This test can also detect whether the water chiller unit 320 has malfunctioned while saving power.

[0093] Optionally, during multiple tests of the water-cooled unit 320, the BMS330 sends a thermal management request to the water-cooled unit 320's water-cooled controller. At this time, the water-cooled controller 321 stops its self-test and starts the water-cooled unit 320 to operate normally, so that the water-cooled unit 320 can complete the normal thermal management requirements.

[0094] By performing multiple tests on the water-cooled unit 320 during its dormancy period, faults in the water-cooled unit 320 can be detected more accurately, ensuring stable operation after waking up and reducing the risk of downtime. This, in turn, improves the overall reliability and stability of the energy storage system 300. Furthermore, during the testing process, by sequentially testing the water-cooled unit 320 in at least two of the following modes—cooling mode, heating mode, and self-circulation mode—fault detection is further enhanced, improving the self-test health of the water-cooled unit 320.

[0095] In the above S230, when the water-cooled unit 320 malfunctions, the water-cooled controller 321 in the water-cooled unit 320 sends fault information of the water-cooled unit 320. The fault information includes temperature-related faults, such as coolant temperature being too high or too low, insufficient coolant flow, etc.; pressure-related faults, such as coolant pressure being too high or too low, or unbalanced pressure in the cooling unit, etc.; water flow-related faults, such as water pump failure, etc.; electrical-related faults, such as control circuit failure, etc. This application does not limit these in any way.

[0096] It should be understood that, in the event of a malfunction in the water-cooled unit 320, the water-cooling controller 321 can send fault information of the water-cooled unit 320 to the BMS 330. The BMS 330 can then send the fault information to a client or to other controllers. These controllers can also send the fault information to the client. This application does not impose any limitations on this. The following embodiments all use sending fault information of the water-cooled unit 320 to the BMS 330 as an example for illustration.

[0097] Through the technical solution of this application embodiment, the water-cooling controller 321 in the water-cooled unit 320 controls the water-cooled unit 320 to perform self-checks during the water-cooled unit 320's hibernation period. If a fault is detected in the water-cooled unit 320, the controller reports the fault information to the BMS 330, transmitting the fault information to the customer or after-sales service. This allows the customer to formulate early warning measures in advance, and the after-sales service to respond quickly for maintenance, improving customer satisfaction. Furthermore, the self-check enables the water-cooled unit 320 to quickly resume normal operation when needed, improving the overall reliability and stability of the energy storage system 300. Further, the self-check in hibernation mode can detect whether there are any abnormalities or damages in the water-cooled unit 320, allowing for timely maintenance or replacement. This ensures stable operation of the water-cooled unit 320 after it is awakened, reducing the risk of water-cooled unit 320 downtime and thus improving the overall reliability and stability of the entire energy storage system 300.

[0098] According to some embodiments of this application, such as Figure 4 As shown, the control method 400 for the energy storage system includes the following:

[0099] S410: Receives data information sent by multiple sensors in the water-cooled unit.

[0100] S420: Confirm fault information based on data information.

[0101] Specifically, the execution subject of this method embodiment can be the water-cooling controller 321 in the water-cooled unit 320. It should be understood that the execution subject of this method embodiment can also be a controller set outside the water-cooled unit 320 for controlling the water-cooled unit 320. The following embodiments all take the water-cooling controller 321 in the water-cooled unit 320 as an example for description.

[0102] In S410 and S420 above, the water-cooling controller 321 in the water-cooled unit 320 receives data information sent by multiple sensors in the water-cooled unit 320. These sensors are respectively located near various components of the water-cooled unit 320 to detect the coolant around each component. The sensors can be temperature sensors and / or pressure sensors. The temperature and / or pressure of the coolant near each component of the water-cooled unit 320 are detected and compared with preset values ​​to obtain fault information.

[0103] Figure 5 A schematic diagram of another energy storage system 300 provided in an embodiment of this application is shown.

[0104] Figure 6 A schematic flowchart of a control method 600 for an energy storage system provided in an embodiment of this application is shown.

[0105] According to some embodiments of this application, optionally, reference is made to... Figure 5 and Figure 6 The water-cooled 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:

[0106] S610: Receives data information sent by the first pressure sensor, including the first pressure data.

[0107] S620: Based on the first pressure data, determine the first fault information, which indicates that the heat exchanger has malfunctioned.

[0108] Specifically, the execution subject of this method embodiment can be the water-cooling controller 321 in the water-cooled unit 320. It should be understood that the execution subject of this method embodiment can also be a controller set outside the water-cooled unit 320 for controlling the water-cooled unit 320. The following embodiments all take the water-cooling controller 321 in the water-cooled unit 320 as an example for description.

[0109] In the above S620, the water-cooled controller 321 in the water-cooled unit 320 can determine the first fault information, which is included in the fault information, by comparing the first pressure data with the preset pressure data. The first fault information indicates that the heat exchanger 522 has malfunctioned.

[0110] Optionally, the water-cooled controller 321 in the water-cooled unit 320 can also determine the first fault information, including the first fault information, based on the first pressure data. The first fault information indicates the specific parameters of the heat exchanger 522 that caused the fault. For example, the first fault information is used to indicate the pressure value of the heat exchanger 522 that caused the fault or the difference between the pressure value and the preset value, etc. This application does not make any limitations in this regard.

[0111] Optional, you can refer to Figure 5 The energy storage system 300 includes a battery unit 10 and a water-cooled unit 320, which includes a compressor 523, a condenser 524, a heat exchanger 522, a heater 521, and an expansion valve 525.

[0112] The compressor 523 is connected to the condenser 524, which in turn is connected to the expansion valve 525 and then to the heat exchanger 522. The expansion valve 525 is then connected to the compressor 523 to form a circulation path. The heat exchanger 522 is then connected to one end of a water pump, and the other end of the water pump is connected to the water supply pipe of the water supply circuit. The water supply pipe is then connected to the water inlet of the battery device 10. The water outlet of the battery device 10 is then connected to the water return pipe of the water supply circuit.

[0113] Alternatively, the heater 521 may be a PTC heater 521.

[0114] Optionally, the heat exchanger 522 can be a plate heat exchanger 522, or simply a plate heat exchanger.

[0115] Figure 7 A schematic flowchart of a control method 700 for an energy storage system provided in an embodiment of this application is shown.

[0116] According to some embodiments of this application, the water-cooled unit 320 further includes a compressor 523, a condenser 524, and a second pressure sensor 5262, wherein 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:

[0117] S710: Receives data information sent by the second pressure sensor, including second pressure data.

[0118] S720: Based on the pressure difference and preset pressure data, determine the second fault information, which indicates that the compressor has malfunctioned. The pressure difference is the difference between the second pressure data and the first pressure data.

[0119] Specifically, the execution subject of this method embodiment can be the water-cooling controller 321 in the water-cooled unit 320. It should be understood that the execution subject of this method embodiment can also be a controller set outside the water-cooled unit 320 for controlling the water-cooled unit 320. The following embodiments all take the water-cooling controller 321 in the water-cooled unit 320 as an example for description.

[0120] In the above S720, the water-cooled controller 321 in the water-cooled unit 320 can determine the second fault information, which is included in the fault information, based on the pressure difference and the preset pressure data. The second fault information indicates that the compressor 523 has malfunctioned. The pressure difference is the difference between the second pressure data and the first pressure data. The data information also includes the second pressure data.

[0121] Similar to S620, the second fault information can indicate the specific parameters of the fault that occurred in heat exchanger 522. This application embodiment will not be illustrated here.

[0122] Figure 8 A schematic flowchart of a control method 800 for an energy storage system 300 provided in an embodiment of this application is shown.

[0123] According to some embodiments of this application, optionally, the water-cooled unit 320 further includes an expansion valve 525 and a first temperature sensor 5263 disposed near the expansion valve 525, such as... Figure 8 As shown, the control method 800 of the energy storage system 300 includes the following:

[0124] S810: Receives data information sent by the first temperature sensor, including the first temperature data.

[0125] S820: Based on the first temperature data, determine the third fault information, which indicates that the expansion valve has malfunctioned.

[0126] Specifically, the execution subject of this method embodiment can be the water-cooling controller 321 in the water-cooled unit 320. It should be understood that the execution subject of this method embodiment can also be a controller set outside the water-cooled unit 320 for controlling the water-cooled unit 320. The following embodiments all take the water-cooling controller 321 in the water-cooled unit 320 as an example for description.

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

[0128] Figure 9 A schematic flowchart of a control method 900 for an energy storage system 300 provided in an embodiment of this application is shown.

[0129] Optionally, according to some embodiments of this application, the energy storage system 300 further includes a battery device 10 and a third pressure sensor 5264. The battery device 10 and the water-cooled unit 320 are connected via a water supply circuit, and the third pressure sensor 5264 is disposed in the water supply circuit. Figure 9 As shown, the control method 900 of the energy storage system 300 includes the following:

[0130] S910: Receives data information sent by the third pressure sensor, including the third pressure data.

[0131] S920: Based on the third pressure data, determine the fourth fault information, which indicates that any component of the water-cooled unit has failed.

[0132] Specifically, the execution subject of this method embodiment can be the water-cooling controller 321 in the water-cooled unit 320. It should be understood that the execution subject of this method embodiment can also be a controller set outside the water-cooled unit 320 for controlling the water-cooled unit 320. The following embodiments all take the water-cooling controller 321 in the water-cooled unit 320 as an example for description.

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

[0134] 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-cooled unit 320 has malfunctioned. Although it cannot detect which specific component has malfunctioned, it can obtain the overall fault information and can also perform inspection and repair one by one.

[0135] Figure 10 A schematic flowchart of a control method 1000 for an energy storage system provided in an embodiment of this application is shown.

[0136] Optionally, according to some embodiments of this application, the energy storage system 300 further includes a second temperature sensor 5265, which is disposed in the water supply circuit, such as... Figure 10 As shown, the control method 1000 of the energy storage system 300 includes the following:

[0137] S1010: Receives data information sent by the second temperature sensor, including the second temperature data.

[0138] S1020: Based on the second temperature data, determine the fifth fault information, which indicates that any component of the water-cooled unit has failed.

[0139] Specifically, the execution subject of this method embodiment can be the water-cooling controller 321 in the water-cooled unit 320. It should be understood that the execution subject of this method embodiment can also be a controller set outside the water-cooled unit 320 for controlling the water-cooled unit 320. The following embodiments all take the water-cooling controller 321 in the water-cooled unit 320 as an example for description.

[0140] Similar to the description in S720, this application will not repeat it here.

[0141] 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-cooled unit 320 has malfunctioned. Although it cannot detect which specific component has malfunctioned, it can obtain the overall fault information and can also perform inspection and repair one by one.

[0142] The energy storage system 300 requires cooling mode and target water temperature from the water-cooled unit 320. Temperature sensors are designed at the inlet and outlet of the water-cooled unit 320 to monitor the real-time water temperature. The compressor 523 in the system will adjust its operating frequency 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 its frequency and increase its 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 its operating frequency, reduce its cooling power, and reduce the power consumption of the auxiliary power source.

[0143] Figure 11 A schematic flowchart of a control method 1100 for an energy storage system 300 provided in an embodiment of this application is shown.

[0144] like Figure 11 As shown, the control method 1100 of the energy storage system includes the following:

[0145] S1110: Receives thermal management requests from the battery management system.

[0146] S1120: The water-cooled unit is tested according to thermal management requirements.

[0147] S1130: In the event of a malfunction in the water-cooled unit, send fault information about the water-cooled unit.

[0148] In this embodiment of the application, when a thermal management request is received from BMS330, i.e. when cooling or heating is required, the water-cooled unit 320 is tested. In this test, the corresponding test is only performed according to the thermal management request. For example, if the thermal management request is cooling, the test is performed during the cooling process of the water-cooled unit 320 to obtain the fault information of the water-cooled unit 320 and report it to BMS330.

[0149] Optionally, in this embodiment, sensors or other devices can be placed at any location in the water-cooled unit 320 for detection to obtain data information to detect whether the water-cooled unit 320 has malfunctioned. In addition, in this embodiment, other data acquisition tools different from sensors can also be used for acquisition, such as gyroscopes, ultrasonic sensors, etc. This application does not impose any restrictions on this.

[0150] Optional, the following combination Figure 5 Provide a detailed description of the cooling mode, heating mode, and self-circulation mode of the 320 water-cooled unit.

[0151] When the battery device 10 requires cooling, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 523 is transformed into a medium-temperature, high-pressure refrigerant through the condenser 524. The heat of the refrigerant is dissipated into the environment. This refrigerant then enters the expansion valve 525, where it becomes a low-temperature, low-pressure two-phase flow refrigerant. It then enters the plate heat exchanger to evaporate and absorb heat. This refrigerant exchanges heat with the high-temperature coolant returning from the battery device 10, transforming the refrigerant into a low-temperature, low-pressure superheated gas, which then re-enters the compressor 523 for recirculation. Meanwhile, the coolant in the coolant circuit, cooled by the plate heat exchanger, enters the battery device 10 through a water pump to absorb heat, carrying away the battery heat inside the battery device 10. The high-temperature coolant then re-enters the plate heat exchanger to release heat.

[0152] When the battery device 10 requires heating, the heater 521 heats the fluid, causing its temperature to rise. The high-temperature coolant then enters the battery device 10 to release heat. After releasing heat, the coolant's temperature decreases, and it re-enters the heater 521 for heating, completing a secondary cycle. During this time, the compressor 523 and other refrigerant circuit components do not operate. The expansion valve 525 connected to the return water pipe can be used to store excess coolant.

[0153] According to some embodiments of this application, optionally, the self-circulation mode is a mode in which the cooling medium circulates in the water supply circuit when the water-cooled 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-cooled unit, but only flows between the water supply circuit and the battery device 10. The cooling medium is the same as the coolant described in the embodiments of this application.

[0154] Optionally, the water-cooled controller 321 can communicate with the BMS330 to implement cooling and heating based on the thermal management needs submitted by the BMS330, and to control the operating mode of the water-cooled unit 320 based on the actual cooling and heating requirements.

[0155] According to some embodiments of this application, this application also provides an energy storage system, including: a water-cooled unit, the water-cooled unit including a water-cooled control unit, the water-cooled control unit being used to determine 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 among cooling mode, heating mode and self-circulation mode; and in the event of a failure of the water-cooled unit, sending fault information of the water-cooled unit to the battery management system.

[0156] According to some embodiments of this application, optionally, the water-cooled unit further includes a compressor, a heat exchanger, a condenser, and an expansion valve, wherein the compressor, heat exchanger, condenser, and expansion valve are connected and connected to the battery device through a water supply circuit.

[0157] According to some embodiments of this application, optionally, the water-cooled unit further includes: a first pressure sensor disposed between the compressor and the heat exchanger for acquiring first pressure data; a second pressure sensor disposed between the compressor and the condenser for acquiring second pressure data; a third pressure sensor located in the water supply circuit for acquiring third pressure data; a first temperature sensor disposed near the expansion valve for acquiring first temperature data; and a second temperature sensor disposed in the water supply circuit for acquiring second temperature data.

[0158] According to some embodiments of this application, this application also provides a control device for an energy storage system, the energy storage system including a water-cooled unit, and the control device including a determination unit and a processing unit.

[0159] The determination unit is used to determine whether the water-cooled unit is in a dormant state.

[0160] The processing unit is used to perform periodic checks on the water-cooled unit during its dormancy period. During the periodic checks, the water-cooled unit is in at least two of the following modes: cooling mode, heating mode, and self-circulation mode. The processing unit is also used to send fault information of the water-cooled unit to the battery management system in the event of a fault in the water-cooled unit.

[0161] According to some embodiments of this application, this application also provides a control device for an energy storage system, including: a processor and a memory, the memory for storing a computer program, and the processor for calling and running the computer program stored in the memory to execute: such as a control method for executing an energy storage system according to any of the above schemes.

[0162] According to some embodiments of this application, this application also provides an energy storage system, including: a water-cooled unit, the water-cooled unit being used to perform the control method for performing any of the above-described schemes of the energy storage system.

[0163] According to some embodiments of this application, this application also provides a chip, including: a processor, configured to call and run a computer program from a memory, causing a device on which the chip is mounted to execute a control method for an energy storage system that performs any of the above schemes.

[0164] According to some embodiments of this application, this application also provides a computer-readable storage medium, including: a computer program stored on the computer-readable storage medium, which, when the computer program is run on a computer, causes the computer to execute a control method for an energy storage system that performs any of the above schemes.

[0165] According to some embodiments of this application, this application also provides a computer program product, which includes instructions for a control method of an energy storage system for executing any of the above-described schemes.

[0166] According to some embodiments of this application, see Figures 2 to 5 This application provides a control method for an energy storage system 300, which includes a water-cooled chiller unit 320. The control method includes: determining that the water-cooled chiller unit 320 is in a dormant state; performing periodic checks on the water-cooled chiller unit 320 during its dormant state, wherein during the periodic checks, the water-cooled chiller unit 320 is in at least two modes among cooling mode, heating mode, and self-circulation mode; and sending fault information of the water-cooled chiller unit 320 to a BMS 330 in the event of a fault in the water-cooled chiller unit 320. This allows the water-cooled chiller unit 320 to quickly resume normal operation when needed, improving the overall reliability and stability of the energy storage system 300. Furthermore, the self-check during the dormant state can detect whether there are any abnormalities or damages in the water-cooled chiller unit 320, allowing for timely maintenance or replacement, ensuring stable operation of the water-cooled chiller unit 320 after it is awakened, reducing the risk of water-cooled chiller unit 320 shutdown, and thus improving the overall reliability and stability of the entire energy storage system 300.

[0167] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling 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-cooled unit, which includes a water-cooled controller, a compressor, a heat exchanger, a first pressure sensor disposed between the compressor and the heat exchanger, a condenser, and a second pressure sensor, wherein the second pressure sensor is disposed between the compressor and the condenser. The control method includes: The water-cooling controller determines that the water-cooling unit is in a dormant state; During the dormancy period of the water-cooled unit, the water-cooled controller performs periodic detection on the water-cooled unit. During the periodic detection of the water-cooled unit, the water-cooled unit is in cooling mode, heating mode and self-circulation mode. The self-circulation mode is a mode in which the cooling medium circulates in the water supply circuit when the water-cooled unit is in dormancy. In the event of a malfunction in the water-cooled unit, the water-cooling controller sends fault information for the water-cooled unit, including pressure fault information, temperature fault information, and water pump fault information; When the water-cooled unit receives a thermal management request, the water-cooling controller stops the periodic detection; The control method further includes: Receive data information sent by the first pressure sensor, the data information including first pressure data; Based on the first pressure data, the fault information is determined to include first fault information, which indicates that the heat exchanger has malfunctioned. Receive data information sent by the second pressure sensor, the data information including second pressure data; Based on the pressure difference and preset pressure data, the second fault information is determined, which indicates that the compressor has malfunctioned. The pressure difference is the difference between the second pressure data and the first pressure data.

2. The control method according to claim 1, characterized in that, The control method further includes: Receive data information sent by multiple sensors in the water-cooled unit; Based on the data information, the fault information is confirmed.

3. The control method according to claim 2, characterized in that, The water-cooled unit also includes an expansion valve and a first temperature sensor located near the expansion valve. Receive data information sent by the first temperature sensor, the data information including first temperature data; Based on the first temperature data, a third fault information is determined, which indicates that the expansion valve has malfunctioned.

4. The control method according to any one of claims 1 to 3, characterized in that, The energy storage system also includes a battery unit and a third pressure sensor. The battery unit and the water-cooled unit are connected via a water supply circuit, and the third pressure sensor is located in the water supply circuit. The control method further includes: Receive data information sent by the third pressure sensor, the data information including third pressure data; Based on the third pressure data, a fourth fault information is determined, which indicates that any component of the water-cooled unit has malfunctioned.

5. The control method according to claim 4, characterized in that, The energy storage system also includes a second temperature sensor, which is installed in the water supply circuit. The control method further includes: Receive data information sent by the second temperature sensor, the data information including second temperature data; Based on the second temperature data, a fifth fault information is determined, which indicates that any component of the water-cooled unit has malfunctioned.

6. The control method according to any one of claims 1 to 3, characterized in that, The control method further includes: Receive thermal management requests from the battery management system; The water-cooled unit was tested according to the aforementioned thermal management requirements; In the event of a malfunction in the water-cooled unit, a malfunction message for the water-cooled unit will be sent.

7. An energy storage system, characterized in that, include: The water-cooled unit includes a water-cooled control unit, a compressor, a heat exchanger, a first pressure sensor disposed between the compressor and the heat exchanger, a condenser, and a second pressure sensor, wherein the second pressure sensor is disposed between the compressor and the condenser. The water-cooling control unit is used to determine whether the water-cooling unit is in a dormant state; during the dormant period of the water-cooling unit, it performs periodic checks on the water-cooling unit, wherein during the periodic checks, the water-cooling unit is in cooling mode, heating mode, and self-circulation mode, and 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; in the event of a malfunction of the water-cooling unit, it sends malfunction information of the water-cooling unit to the battery management system, the malfunction information including pressure malfunction information, temperature malfunction information, and water pump malfunction information; when the water-cooling unit receives a thermal management request, it stops the periodic checks; the water-cooling control unit is also used to receive data information sent by the first pressure sensor, the data information including first pressure data. Based on the first pressure data, the water-cooled control unit is further configured to determine the first fault information included in the fault information, wherein the first fault information indicates that the heat exchanger has malfunctioned; The water-cooling control unit is also used to receive data information sent by the second pressure sensor, the data information including second pressure data; Based on the pressure difference and preset pressure data, the water-cooled control unit is also used to determine the second fault information included in the fault information, the second fault information indicating that the compressor has malfunctioned, and the pressure difference is the difference between the second pressure data and the first pressure data.

8. A control device for an energy storage system, characterized in that, The energy storage system includes a water-cooled unit, a compressor, a heat exchanger, a first pressure sensor disposed between the compressor and the heat exchanger, a condenser, and a second pressure sensor, wherein the second pressure sensor is disposed between the compressor and the condenser. The control device includes a determining unit and a processing unit. The determining unit is used to determine that the water-cooled unit is in a dormant state; The processing unit is used to perform periodic detection on the water chiller during the dormancy period of the water chiller. During the periodic detection of the water chiller, the water chiller is in a cooling mode, a heating mode, and a self-circulation mode. The self-circulation mode is a mode in which the cooling medium circulates in the water supply circuit when the water chiller is in a dormancy state. The processing unit is further configured to send fault information of the water-cooled unit to the battery management system in the event of a fault in the water-cooled unit, the fault information including pressure fault information, temperature fault information, and water pump fault information; The processing unit is also configured to stop the periodic detection when the water-cooled unit receives a thermal management request; The processing unit is further configured to receive data information sent by the first pressure sensor, the data information including first pressure data; Based on the first pressure data, the processing unit is further configured to determine the first fault information included in the fault information, wherein the first fault information indicates that the heat exchanger has malfunctioned; The processing unit is also configured to receive data information sent by the second pressure sensor, the data information including second pressure data; Based on the pressure difference and preset pressure data, the processing unit is further configured to determine second fault information included in the fault information, the second fault information indicating that the compressor has malfunctioned, and the pressure difference is the difference between the second pressure data and the first pressure data.

9. A control device for an energy storage system, characterized in that, include: A processor and a memory, the memory for storing a computer program, the processor for calling and running the computer program stored in the memory to perform: a control method for an energy storage system as claimed in any one of claims 1 to 6.

10. An energy storage system, characterized in that, include: A water-cooled unit, said water-cooled unit being used to perform a control method for an energy storage system as described in any one of claims 1 to 6.

11. A chip, characterized in that, include: A processor for retrieving and running a computer program from memory, causing a device with the chip mounted to perform a control method for the energy storage system as described in any one of claims 1 to 6.

12. A computer-readable storage medium, characterized in that, include: The computer-readable storage medium stores a computer program that, when run on a computer, causes the computer to perform the control method of the energy storage system as described in any one of claims 1 to 6.

13. A computer program product, characterized in that, The computer program product includes instructions for executing a control method for the energy storage system as described in any one of claims 1 to 6.

Images