Method, device and system for detecting a storage system

Abstract

The application discloses a detection method, a detection device and a detection system of an energy storage system, and belongs to the technical field of energy storage. The detection method comprises the following steps: in the case that the energy storage system is shut down, sending a start-up instruction to a first energy storage unit; in the case that the first energy storage unit enters a running state, the direct-current side voltage of a first power unit corresponding to the first energy storage unit is greater than a first voltage threshold, and the direct-current side voltage of a power unit other than the first power unit in a plurality of power units is less than or equal to the first voltage threshold, sending a start-up instruction to the first power unit; in the case that the first power unit enters the running state and the first power unit charges or discharges according to a first working power, acquiring a current working power of the first energy storage unit; and determining a wiring detection result between the first energy storage unit and the first power unit based on the first working power and the current working power. The method can accurately detect the misconnection condition of the energy storage system.

Description

Technical Field

[0001] This application belongs to the field of energy storage technology, and in particular relates to a detection method, detection device and detection system for energy storage systems. Background Technology

[0002] Energy storage systems are trending towards larger capacities and more complex structures, significantly increasing the probability of incorrect connections between batteries and power conversion systems (PCS). When incorrect connections occur, the controllers within the system cannot effectively identify the controlled object, affecting the system's power control and protection functions. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a detection method, detection device, and detection system for energy storage systems, which can accurately detect misconnections and prevent system control chaos or protection function failure.

[0004] In a first aspect, this application provides a method for detecting an energy storage system, the energy storage system comprising a plurality of energy storage units and a plurality of power units connected correspondingly, the method comprising:

[0005] In the event of a shutdown of the energy storage system, a power-on command is sent to the first energy storage unit;

[0006] When the first energy storage unit enters the operating state, and the DC side voltage of the first power unit corresponding to the first energy storage unit is greater than the first voltage threshold, and the DC side voltage of the power units other than the first power unit is less than or equal to the first voltage threshold, a power-on command is sent to the first power unit.

[0007] When the first power unit enters the operating state and the first power unit charges or discharges according to the first operating power, the current operating power of the first energy storage unit is obtained.

[0008] Based on the first operating power and the current operating power, the wiring detection result between the first energy storage unit and the first power unit is determined.

[0009] According to the detection method of the energy storage system in this application, by sending a power-on command to the energy storage unit, detecting the DC side voltage of the power unit, and then sending a power-on command to the power unit to detect the current operating power of the energy storage unit, the misconnection of the energy storage system can be accurately detected, effectively preventing the system from experiencing control chaos or protection function failure.

[0010] According to one embodiment of this application, determining the wiring detection result between the first energy storage unit and the first power unit based on the first operating power and the current operating power includes:

[0011] If the directions of the first operating power and the current operating power are different, or if the difference between the first operating power and the current operating power is greater than the target power difference, it is determined that the wiring between the first energy storage unit and the first power unit is abnormal.

[0012] According to one embodiment of this application, the target power difference is determined based on the first operating power.

[0013] According to one embodiment of this application, the first operating power is determined based on the current state of charge of the first energy storage unit and the rated power of the first power unit.

[0014] According to one embodiment of this application, when the current state of charge of the first energy storage unit is greater than the target state of charge threshold, the first operating power is the first discharge power; when the current state of charge of the first energy storage unit is less than or equal to the target state of charge threshold, the first operating power is the first charging power.

[0015] According to one embodiment of this application, after sending the power-on command to the first energy storage unit, the method further includes:

[0016] If the first energy storage unit enters the operating state, and the DC side voltage of the first power unit corresponding to the first energy storage unit is less than or equal to the first voltage threshold, or the DC side voltage of the power units other than the first power unit among the plurality of power units is greater than the first voltage threshold, it is determined that the wiring between the first energy storage unit and the first power unit is abnormal.

[0017] According to one embodiment of this application, after sending the power-on command to the first energy storage unit, the method further includes:

[0018] If the power-on time of the first energy storage unit exceeds a first time threshold and the first energy storage unit is not powered on, the first energy storage unit is determined to be faulty.

[0019] According to one embodiment of this application, after sending the power-on command to the first power unit, the method further includes:

[0020] If the power-on duration of the first power unit exceeds the second duration threshold and the first power unit is not powered on, the first power unit is determined to be faulty.

[0021] Secondly, this application provides a detection method for an energy storage system, the energy storage system comprising multiple energy storage units and multiple power units connected correspondingly, the method comprising:

[0022] In the event that the energy storage system is shut down, the target detection results of each of the energy storage units and each of the power units are obtained;

[0023] If it is determined that there is abnormal information in the target detection result, the abnormal information is output;

[0024] The target detection result is obtained based on the detection method of the energy storage system described in the first aspect above.

[0025] According to the detection method of the energy storage system in this application, by sending a power-on command to the energy storage unit, detecting the DC side voltage of the power unit, and then sending a power-on command to the power unit to detect the current operating power of the energy storage unit, the detection of each energy storage unit and each power unit of the energy storage system can be performed. This can accurately detect the misconnection between the energy storage units and the power units in the energy storage system. When there is abnormal information in the target detection result, the abnormal information is output to prompt, effectively preventing the system from experiencing control chaos or protection function failure.

[0026] Thirdly, this application provides a detection device for an energy storage system, the energy storage system including a plurality of energy storage units and a plurality of power units connected correspondingly, the device comprising:

[0027] The first processing module is used to send a power-on command to the first energy storage unit when the energy storage system is shut down;

[0028] The second processing module is used to send a power-on command to the first power unit when the first energy storage unit enters the operating state, the DC side voltage of the first power unit corresponding to the first energy storage unit is greater than the first voltage threshold, and the DC side voltage of the power units other than the first power unit among the plurality of power units is less than or equal to the first voltage threshold.

[0029] The third processing module is used to obtain the current operating power of the first energy storage unit when the first power unit enters the operating state and the first power unit is charging or discharging according to the first operating power.

[0030] The fourth processing module is used to determine the wiring detection result between the first energy storage unit and the first power unit based on the first operating power and the current operating power.

[0031] Fourthly, this application provides a testing device for an energy storage system, the energy storage system including multiple energy storage units and multiple power units connected correspondingly, the device comprising:

[0032] The fifth processing module is used to acquire the target detection results of each of the energy storage units and each of the power units when the energy storage system is shut down.

[0033] The sixth processing module is used to output the abnormal information when it is determined that there is abnormal information in the target detection result;

[0034] The target detection result is obtained based on the detection method of the energy storage system described in the first aspect above.

[0035] Fifthly, this application provides a detection system for an energy storage system, the energy storage system including multiple energy storage units and multiple power units connected correspondingly, the detection system including:

[0036] A local controller, comprising a detection device for an energy storage system as described in the third or fourth aspect above, the local controller being configured to communicate with the plurality of energy storage units and the plurality of power units.

[0037] Sixthly, this application provides an energy storage system, comprising:

[0038] Correspondingly connected to multiple energy storage units and multiple power units;

[0039] The detection device for the energy storage system described in the third or fourth aspect above is communicatively connected to the plurality of energy storage units and the plurality of power units.

[0040] According to one embodiment of this application, the energy storage unit and the power unit are connected in a one-to-one correspondence.

[0041] According to one embodiment of this application, the energy storage unit includes at least one battery cluster and at least one DC-DC converter, wherein the battery cluster and the DC-DC converter are connected in a one-to-one correspondence.

[0042] In a seventh aspect, this application provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the detection method of the energy storage system as described in the first or second aspect above.

[0043] Eighthly, this application provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the detection method for the energy storage system as described in the first or second aspect above.

[0044] Ninthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the detection method for an energy storage system as described in the first or second aspect above.

[0045] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0046] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0047] Figure 1 This is one of the structural schematic diagrams of the energy storage system provided in the embodiments of this application;

[0048] Figure 2 This is a second schematic diagram of the energy storage system provided in the embodiments of this application;

[0049] Figure 3 This is one of the flowcharts illustrating the detection method for an energy storage system provided in the embodiments of this application;

[0050] Figure 4 This is a second schematic flowchart of the detection method for the energy storage system provided in the embodiments of this application;

[0051] Figure 5 This is the third flowchart illustrating the detection method for an energy storage system provided in this application embodiment;

[0052] Figure 6 This is one of the structural schematic diagrams of the detection device for the energy storage system provided in the embodiments of this application;

[0053] Figure 7 This is a second schematic diagram of the structure of the detection device for the energy storage system provided in the embodiments of this application;

[0054] Figure 8 This is a schematic diagram of the structure of the detection system for the energy storage system provided in the embodiments of this application;

[0055] Figure 9 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application.

[0056] Figure label:

[0057] Energy storage device 100, battery combiner cabinet 110, battery cluster 121, DC-DC converter unit 122, energy storage converter 200, power unit 220, detection system 800, local controller 810. Detailed Implementation

[0058] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0059] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0060] The following description, in conjunction with the accompanying drawings, details the energy storage system detection method, energy storage system detection device, energy storage system detection system 800, electronic device, and readable storage medium provided in this application through specific embodiments and application scenarios.

[0061] In this embodiment of the application, the energy storage system includes multiple energy storage units and multiple power units 220 connected accordingly.

[0062] In some embodiments, the energy storage unit and the power unit 220 can be connected one-to-one.

[0063] In actual implementation, the energy storage system includes an energy storage device 100 and an energy storage converter 200. The energy storage device 100 includes at least two energy storage units. Each energy storage unit includes at least one battery cluster 121 and at least one DC-DC converter 122. The battery cluster 121 and the DC-DC converter 122 are connected in a one-to-one correspondence.

[0064] Among them, the DC-DC converter 122 is a power conversion device that can convert the DC voltage of the battery cluster 121 and control the voltage and current of the battery cluster 121.

[0065] By adding a DC-DC converter 122 between the battery cluster 121 and the energy storage converter in the energy storage system, the voltage and current of the battery cluster 121 can be precisely controlled, realizing "one cluster, one management" of the energy storage system.

[0066] For example, such as Figure 1As shown, the energy storage device 100 includes eight battery clusters 121, namely RCAK1#, RCAK2#, RCAK3#, RCAK4#, RCAK5#, RCAK6#, RCAK7# and RCAK8#. Each battery cluster 121 is connected to a DC-DC converter unit 122. Each energy storage unit includes two battery clusters 121 and two DC-DC converter units 122.

[0067] RCAK1# and RCAK2# together with the two corresponding DC-DC converters 122 form an energy storage unit, RCAK3# and RCAK4# together with the two corresponding DC-DC converters 122 form an energy storage unit, and so on.

[0068] The energy storage device 100 may also include a battery collection panel (BCP) 110, which is located between the energy storage unit and the energy storage converter 200. The battery collection panel 110 can collect the DC power output from multiple energy storage units and output it to the energy storage converter 200 for subsequent energy conversion.

[0069] The battery combiner cabinet 110 includes four ports: DC1, DC2, DC3, and DC4. Each port is connected to an energy storage unit. DC1 is connected to the first energy storage unit, which consists of RCAK1# and RCAK2# and two corresponding DC-DC converter units 122. DC2 is connected to the second energy storage unit, which consists of RCAK3# and RCAK4# and two corresponding DC-DC converter units 122, and so on.

[0070] The energy storage device 100 includes multiple energy storage units, and the energy storage converter 200 includes at least two power units 220. The at least two energy storage units can be connected one-to-one with the at least two power units 220 of the energy storage converter 200.

[0071] Among them, the power unit 220 can convert DC power into AC power.

[0072] For example, such as Figure 2 As shown, the energy storage converter 200 includes four power units 220: 1#1250UD, 2#1250UD, 3#1250UD and 4#1250UD. The power units 220 are connected to the four energy storage units of the energy storage system through the four ports of the battery combiner cabinet 110.

[0073] It is understandable that 1#1250UD is connected to DC1, 2#1250UD is connected to DC2, 3#1250UD is connected to DC3, and 4#1250UD is connected to DC4. When 1#1250UD is connected to DC2, DC3, or DC4, it indicates that the wiring between the energy storage unit and the power unit 220 is abnormal, that is, there is a misconnection.

[0074] When the wiring between the energy storage unit and the power unit 220 is abnormal, the controllers in the energy storage device 100 and the energy storage converter 200 cannot effectively identify the controlled object, affecting the power control and protection functions of the energy storage system.

[0075] This application provides a detection method for an energy storage system, which can accurately detect misconnections and prevent system control chaos or protection function failure.

[0076] The energy storage system detection method provided in this application embodiment can be executed by an electronic device or a functional module or functional entity in an electronic device that can implement the energy storage system detection method.

[0077] like Figure 3 As shown, the detection method for the energy storage system includes steps 310, 320, 330 and 340.

[0078] Step 310: In the event that the energy storage system is shut down, send a power-on command to the first energy storage unit.

[0079] In this step, when the energy storage system is shut down, a start-up command is sent to the first energy storage unit in the energy storage device 100 to control the first energy storage unit to start up and enter the operating state.

[0080] It is understood that the first energy storage unit can be any energy storage unit in the energy storage device 100 that requires testing wiring.

[0081] For example, when the energy storage system is shut down, a power-on command is sent to the first energy storage unit, which consists of RCAK1# and RCAK2# and the corresponding two DC-DC converter units 122. The first energy storage unit enters the operating state, and the DC1 port of the battery combiner cabinet 110 has a DC voltage.

[0082] It should be noted that confirming the energy storage system is in a shutdown state before sending the start command to the first energy storage unit can prevent control chaos or protection failure of the energy storage system.

[0083] Step 320: When the first energy storage unit enters the operating state, and the DC side voltage of the first power unit corresponding to the first energy storage unit is greater than the first voltage threshold, and the DC side voltage of the power units 220 other than the first power unit is less than or equal to the first voltage threshold, a power-on command is sent to the first power unit.

[0084] The first power unit is the power unit 220 in the energy storage converter 200 that corresponds to the first energy storage unit. When the wiring between the first power unit and the first energy storage unit is abnormal, it will cause the energy storage system to experience control chaos or protection failure.

[0085] For example, the first energy storage unit is composed of RCAK1# and RCAK2# and the corresponding two DC-DC converter units 122, and the first power unit is 1#1250UD corresponding to DC1 of the battery combiner cabinet 110.

[0086] It is understandable that after the first energy storage unit enters the operating state by sending a power-on command to the first energy storage unit, the port corresponding to the first energy storage unit has a DC voltage, while the ports corresponding to the other energy storage units in the energy storage device 100 do not have a DC voltage.

[0087] In actual implementation, a first voltage threshold can be preset, and the DC side voltage of each power unit 220 can be compared with the first voltage threshold. When the DC side voltage of a power unit 220 is greater than the first voltage threshold, it indicates that there is voltage on the DC side of the power unit 220. When the DC side voltage of a power unit 220 is less than or equal to the first voltage threshold, it indicates that there is no voltage on the DC side of the power unit 220.

[0088] Taking a first voltage threshold of 0 as an example.

[0089] When the DC side voltage of the first power unit is greater than 0, it indicates that there is an electrical connection between the first energy storage unit and the first power unit. When the DC side voltage of the power unit 220 other than the first power unit in the energy storage converter 200 is 0, it indicates that there is no electrical connection between the first energy storage unit and the power unit 220 other than the first power unit in the energy storage converter 200.

[0090] In this embodiment, when the first energy storage unit enters the operating state, the DC side voltage of each power unit 220 in the energy storage converter 200 is acquired. If the DC side voltage of the first power unit is greater than the first voltage threshold, and the DC side voltage of the power units 220 other than the first power unit in the energy storage converter 200 is less than or equal to the first voltage threshold, it is determined that there is an electrical connection between the first energy storage unit and the first power unit, and a power-on command is sent to the first power unit to control the first power unit to start up and enter the operating state.

[0091] Step 330: When the first power unit enters the operating state and the first power unit is charging or discharging according to the first operating power, obtain the current operating power of the first energy storage unit.

[0092] Understandably, once the first power unit enters the operating state, it can achieve electrical energy conversion.

[0093] In this embodiment, the first power unit performs electrical energy conversion according to the first operating power, and there is an electrical connection between the first energy storage unit and the first power unit. The first energy storage unit can obtain the current operating power of the first energy storage unit when it is charged or discharged.

[0094] The first operating power can be a preset power value for charging or discharging.

[0095] Step 340: Based on the first operating power and the current operating power, determine the wiring detection result between the first energy storage unit and the first power unit.

[0096] In this embodiment, the first operating power of the first power unit and the current operating power of the first energy storage unit are compared, and the wiring detection result between the first energy storage unit and the first power unit is determined based on the comparison result.

[0097] When the first operating power is basically the same as the current operating power, it indicates that the power control between the first power unit and the first energy storage unit is normal, and it is determined that the wiring between the first energy storage unit and the first power unit is normal.

[0098] When the first operating power is inconsistent with the current operating power, it indicates that the power control between the first power unit and the first energy storage unit is disordered, and it is determined that the wiring between the first energy storage unit and the first power unit is abnormal.

[0099] In related technologies, the voltage of the DC / DC module and PCS module is detected to determine whether the wiring is abnormal. This type of technology is prone to misjudgment and has a low accuracy rate in wiring detection. Even if the wiring detection passes, power control chaos may still occur.

[0100] In this embodiment, when the energy storage system is shut down, one energy storage unit in the energy storage system is started individually. First, based on the DC side voltage of the power unit 220 corresponding to the energy storage unit, it is determined whether there is an electrical connection between the energy storage unit and the power unit 220. Then, a start-up command is issued to the power unit 220. Based on the first operating power of the power unit 220 and the current operating power of the energy storage unit, the power control status between the energy storage unit and the power unit 220 is analyzed to determine whether there is an abnormality in the wiring between the energy storage unit and the power unit 220. After determining the wiring detection result of the current energy storage unit and the power unit 220, the current energy storage unit and the power unit 220 are shut down. Then, the wiring detection is performed on the next energy storage unit and the power unit 220. This can accurately detect the misconnection between the energy storage device 100 and the energy storage converter 200 in the energy storage system, preventing system control chaos or protection function failure.

[0101] In actual operation, when a wiring abnormality is detected, fault protection can be implemented, indicating the abnormal wiring that needs to be checked. If the wiring test fails, the energy storage system is prohibited from starting up.

[0102] According to the energy storage system detection method provided in the embodiments of this application, by sending a power-on command to the energy storage unit, detecting the DC side voltage of the power unit 220, and then sending a power-on command to the power unit 220 to detect the current operating power of the energy storage unit, the misconnection of the energy storage system can be accurately detected, effectively preventing the system from experiencing control chaos or protection function failure.

[0103] In some embodiments, step 340, determining the wiring detection result between the first energy storage unit and the first power unit based on the first operating power and the current operating power, may include:

[0104] If the directions of the first operating power and the current operating power are different, or if the difference between the first operating power and the current operating power is greater than the difference in the target power, an abnormality in the wiring between the first energy storage unit and the first power unit is determined.

[0105] It is understandable that the first power unit can control the charging or discharging of the first energy storage unit. The direction of current flow is different during charging and discharging, that is, the direction of power is different.

[0106] In this embodiment, the directions of the first operating power and the current operating power are determined. When the directions of the first operating power and the current operating power are different, it is determined that the wiring between the first energy storage unit and the first power unit is abnormal.

[0107] The difference between the first operating power and the current operating power is judged. When the difference between the first operating power and the current operating power is greater than the preset target power difference, it indicates that the power control between the first power unit and the first energy storage unit is chaotic, and it is judged that the wiring between the first energy storage unit and the first power unit is abnormal.

[0108] It is understandable that when the first operating power and the current operating power are in the same direction, and the difference between the first operating power and the current operating power is less than or equal to the target power difference, it indicates that the power control between the first power unit and the first energy storage unit is normal, and it is judged that the wiring between the first energy storage unit and the first power unit is normal.

[0109] In some embodiments, if a wiring abnormality is determined between the first energy storage unit and the first power unit, a prompt message indicating the wiring abnormality between the first energy storage unit and the first power unit is output to indicate the wiring abnormality and facilitate system inspection and maintenance.

[0110] In some embodiments, the target power difference is determined based on a first operating power.

[0111] It is understandable that the target power difference is a critical value used to determine whether the difference between the first operating power and the current operating power is within the allowable error range.

[0112] In this embodiment, the target power difference can be set according to the first operating power. For example, the target power difference can be obtained by performing a difference calculation or a product calculation on the first operating power.

[0113] It should be noted that a target power difference is set based on the first operating power of the first power unit. The target power difference changes with the change of the first operating power to adapt to different charging and discharging control scenarios and avoid the risk of misjudgment caused by a fixed power difference threshold.

[0114] The following is a specific example.

[0115] When the first power unit enters the operating state, the first power unit performs charging or discharging control according to the first operating power P2, obtains the current value and voltage value of the first energy storage unit, and obtains the current operating power P1 of the first energy storage unit by combining the current direction of the first energy storage unit.

[0116] Among them, the target power difference P3 = P2 * 50%.

[0117] In this embodiment, P2 and P1 are in the same direction, and -|P3|≤|P1|-|P2|≤+|P3|, indicating that the difference between the first operating power and the current operating power is within the allowable error range, and it is determined that the wiring between the first energy storage unit and the first power unit is normal.

[0118] When P2 and P1 are in different directions, it is determined that the wiring between the first energy storage unit and the first power unit is abnormal.

[0119] When |P1|-|P2|>+|P3| (or |P1|-|P2|<-|P3|), it indicates that the difference between the first operating power and the current operating power exceeds the allowable error range, and it is determined that the wiring between the first energy storage unit and the first power unit is abnormal.

[0120] It should be noted that the target power difference is a positive value greater than 0. The difference between the first working power and the current working power being greater than the target power difference means that the absolute value of the difference between the first working power and the current working power is greater than the target power difference.

[0121] In some embodiments, the first operating power is determined based on the current state of charge of the first energy storage unit and the rated power of the first power unit.

[0122] In this embodiment, the first power unit enters the operating state. Based on the current state of charge of the first energy storage unit and the rated power of the first power unit, a first operating power for charging or discharging is set for the first power unit. The first power unit charges or discharges according to the first operating power, which will not exceed the normal operating conditions of the first energy storage unit and the first power unit, and the obtained current operating power is more accurate.

[0123] The current state of charge of the first energy storage unit is used to determine the direction of the first operating power.

[0124] In some embodiments, when the current state of charge of the first energy storage unit is greater than the target state of charge threshold, the first operating power is the first discharge power.

[0125] In some embodiments, when the current state of charge of the first energy storage unit is less than or equal to the target state of charge threshold, the first operating power is the first charging power.

[0126] The target state of charge threshold is a preset state of charge critical value.

[0127] When the current state of charge of the first energy storage unit is greater than the target state of charge threshold, it indicates that the first energy storage unit is in a state of relatively high charge. At this time, the first operating power is the first discharge power, and the first power unit discharges the first energy storage unit according to the first discharge power.

[0128] When the current state of charge of the first energy storage unit is less than or equal to the target state of charge threshold, it indicates that the first energy storage unit is in a state of relatively low power. At this time, the first working power is the first charging power, and the first power unit charges the first energy storage unit according to the first charging power.

[0129] It should be noted that the rated power of the first power unit is used to determine the value of the first operating power, and the value of the first operating power is less than the rated power of the first power unit.

[0130] In actual operation, the first operating power can be equal to 5%-95% of the rated power.

[0131] In this embodiment, when the first power unit is charging or discharging according to the first operating power, the first power unit operates under normal conditions, which can avoid the first power unit operating under extremely high or extremely low charging and discharging conditions, improve the accuracy of the difference between the first operating power and the current operating power, and avoid misjudgment.

[0132] For example, the first operating power is 5% of the rated power, and the target state of charge threshold is 50%.

[0133] When the current state of charge of the first energy storage unit is greater than 50%, the first power unit controls the first energy storage unit to discharge at 5% of the rated power. When the current state of charge of the first energy storage unit is less than or equal to 50%, the first power unit controls the first energy storage unit to charge at 5% of the rated power.

[0134] In some embodiments, after sending a power-on command to the first energy storage unit, the detection method of the energy storage system may further include:

[0135] If the first energy storage unit enters the operating state, and the DC side voltage of the first power unit corresponding to the first energy storage unit is less than or equal to the first voltage threshold, or the DC side voltage of the power unit 220 other than the first power unit in the energy storage converter 200 is greater than the first voltage threshold, it is determined that the wiring between the first energy storage unit and the first power unit is abnormal.

[0136] In this embodiment, the first energy storage unit enters the operating state and obtains the DC side voltage of each power unit 220 in the energy storage converter 200. When the DC side voltage of the first power unit is less than or equal to the first voltage threshold, it is determined that there is no electrical connection between the first energy storage unit and the first power unit, that is, the wiring between the first energy storage unit and the first power unit is abnormal.

[0137] When the DC side voltage of at least one power unit 220 in the energy storage converter 200, other than the first power unit, is greater than the first voltage threshold, it is determined that there is an electrical connection between one or more power units 220 and the first energy storage unit in the energy storage converter 200, other than the first power unit, and the wiring between the first energy storage unit and the first power unit is abnormal.

[0138] It should be noted that when the DC side voltage of the first power unit corresponding to the first energy storage unit is less than or equal to the first voltage threshold, or the DC side voltage of the power unit 220 other than the first power unit in the energy storage converter 200 is greater than the first voltage threshold, it is determined that the wiring between the first energy storage unit and the first power unit is abnormal, and no more power-on commands will be issued to the first power unit.

[0139] Taking a first voltage threshold of 0 as an example.

[0140] When the DC side voltage of the first power unit corresponding to the first energy storage unit is 0, it is determined that the wiring between the first energy storage unit and the first power unit is abnormal.

[0141] When the DC side voltage of the power unit 220 (excluding the first power unit) in the energy storage converter 200 is not 0 (i.e. greater than 0), it is determined that the wiring between the first energy storage unit and the first power unit is abnormal.

[0142] In some embodiments, if a wiring abnormality is determined between the first energy storage unit and the first power unit, a prompt message indicating a wiring abnormality between the first energy storage unit and the first power unit is output.

[0143] It should be noted that the detection method for the energy storage system provided in this application embodiment can detect whether the wiring between the energy storage unit and the power unit 220 is abnormal, and can also detect faults in the energy storage unit and the power unit 220 themselves.

[0144] In some embodiments, after sending a power-on command to the first energy storage unit, the detection method of the energy storage system may further include:

[0145] If the first energy storage unit is not powered on when the power-on time exceeds a first time threshold, the first energy storage unit is determined to be faulty.

[0146] Among them, the first duration threshold is the critical value of the time required for the energy storage unit to start up.

[0147] When the power-on time of the first energy storage unit exceeds the first time threshold and the first energy storage unit is not powered on, it indicates that the first energy storage unit is faulty and cannot be powered on.

[0148] In this embodiment, after sending a power-on command to the first energy storage unit, the power-on duration of the first energy storage unit is started. When the power-on duration exceeds a first duration threshold and the first energy storage unit is not powered on, the first energy storage unit is determined to be faulty, and the corresponding fault information is recorded. Then, a power-on command can be sent to the next energy storage unit to perform fault and wiring detection.

[0149] In some embodiments, after sending a power-on command to the first power unit, the detection method of the energy storage system may further include:

[0150] If the power-on duration of the first power unit exceeds the second duration threshold and the first power unit is not powered on, the first power unit is determined to be faulty.

[0151] The first duration threshold is the critical value of the power unit 220's required power-on time.

[0152] If the power-on time of the first power unit exceeds the second time threshold and the first power unit fails to power on, it indicates that the first power unit is faulty and cannot be powered on.

[0153] In this embodiment, after sending a power-on command to the first power unit, the power-on duration of the first power unit is timed. When the power-on duration exceeds the second duration threshold and the first power unit is not powered on, the first power unit is determined to be faulty, and the corresponding fault information is recorded. Then, a power-on command can be sent to the next energy storage unit to perform fault and wiring detection on the next energy storage unit and the corresponding power unit 220.

[0154] In some embodiments, if a fault is determined in the first energy storage unit, a fault message for the first energy storage unit is output; if a fault is determined in the first power unit, a fault message for the first power unit is output.

[0155] This application embodiment also provides another detection method for an energy storage system. By performing fault and wiring detection on each energy storage unit and each power unit 220 in the energy storage system according to the above-described energy storage system detection method, the misconnection situation can be accurately detected, preventing the system from experiencing control chaos or protection function failure.

[0156] The energy storage system includes multiple energy storage units and multiple power units 220 connected to each other.

[0157] In actual implementation, the energy storage system includes an energy storage device 100 and an energy storage converter 200. At least two energy storage units of the energy storage device 100 can be connected one-to-one with at least two power units 220 of the energy storage converter 200. Each energy storage unit includes at least one battery cluster 121 and at least one DC-DC converter 122, and the battery cluster 121 and the DC-DC converter 122 are connected one-to-one.

[0158] The present application also provides a detection method for an energy storage system. The subject executing the detection method for the energy storage system can be an electronic device or a functional module or functional entity in an electronic device that can implement the detection method for the energy storage system.

[0159] like Figure 4 As shown, the detection method for the energy storage system includes steps 410 and 420.

[0160] Step 410: With the energy storage system shut down, acquire the target detection results for each energy storage unit and each power unit 220.

[0161] The target detection results are obtained based on the detection method of the energy storage system described above.

[0162] In this embodiment, it is confirmed that the energy storage system is in a shutdown state, and a power-on command is sent to the currently detected energy storage unit in the energy storage device 100. Based on the DC side voltage of each power unit 220 in the energy storage converter 200, it is determined whether there is an electrical connection between the currently detected energy storage unit and the corresponding power unit 220.

[0163] After confirming that there is an electrical connection between the currently detected energy storage unit and the corresponding power unit 220, a power-on command is sent to the power unit 220 corresponding to the currently detected energy storage unit. Based on the operating power of the currently detected energy storage unit and the corresponding power unit 220, it is determined whether the wiring between the currently detected energy storage unit and the corresponding power unit 220 is normal.

[0164] After obtaining the wiring detection result between the currently detected energy storage unit and the corresponding power unit 220, the system controls the currently detected energy storage unit and the corresponding power unit 220 to shut down, and then sends a power-on command to the next detected energy storage unit, and so on, to detect each energy storage unit and each power unit 220 to obtain the target detection result.

[0165] It should be noted that the target detection results may include the inspection results such as whether the wiring between the energy storage unit and the corresponding power unit 220 in the energy storage system is abnormal, whether the energy storage unit is faulty, and whether the power unit 220 is faulty.

[0166] In actual implementation, the energy storage units of the energy storage device 100 and the power units 220 of the energy storage converter 200 are assigned serial numbers, and the energy storage units and power units 220 can be tested sequentially according to the serial numbers.

[0167] For example, such as Figure 1 As shown, the energy storage device 100 includes eight battery clusters 121, namely RCAK1#, RCAK2#, RCAK3#, RCAK4#, RCAK5#, RCAK6#, RCAK7# and RCAK8#. Each battery cluster 121 is connected to a DC-DC converter unit 122. Each energy storage unit includes two battery clusters 121 and two DC-DC converter units 122.

[0168] The battery combiner cabinet 110 includes four ports: DC1, DC2, DC3, and DC4. Each port is connected to an energy storage unit. DC1 is connected to the first energy storage unit, which consists of RCAK1# and RCAK2# and two corresponding DC-DC converter units 122. DC2 is connected to the second energy storage unit, which consists of RCAK3# and RCAK4# and two corresponding DC-DC converter units 122, and so on.

[0169] like Figure 2 As shown, the energy storage converter 200 includes four power units 220: 1#1250UD, 2#1250UD, 3#1250UD and 4#1250UD. The power units 220 are connected to the four energy storage units of the energy storage system through the four ports of the battery combiner cabinet 110.

[0170] In this embodiment, the energy storage unit and the power unit 220 are tested sequentially. First, a power-on command is sent to the first energy storage unit corresponding to DC1 to check whether the first energy storage unit and 1#1250UD have any faults or wiring abnormalities. After obtaining the test results of the first energy storage unit and 1#1250UD, a power-on command is sent to the second energy storage unit corresponding to DC2 to check whether the second energy storage unit and 2#1250UD have any faults or wiring abnormalities, and so on.

[0171] It should be noted that the test results of the energy storage unit and the corresponding power unit 220 can be: the energy storage unit and the corresponding power unit 220 are fault-free and the wiring is normal; the energy storage unit and the corresponding power unit 220 are fault-free but the wiring is abnormal; or the energy storage unit or the power unit 220 is faulty.

[0172] Step 420: If it is determined that there is abnormal information in the target detection result, output the abnormal information.

[0173] In this step, the presence of abnormal information in the target detection result refers to abnormal information such as the energy storage unit and the corresponding power unit 220 being fault-free but having abnormal wiring, or the energy storage unit being faulty or the power unit 220 being faulty. At this time, the corresponding abnormal information is output, prompting to adjust the wiring or perform maintenance.

[0174] It should be noted that when abnormal information is detected in the target detection results, the abnormal information is output and the energy storage system is not turned on. This can prevent the energy storage system from experiencing control chaos or protection failure. When no abnormal information is detected in the target detection results, the energy storage system can be turned on and run.

[0175] According to the energy storage system detection method provided in the embodiments of this application, by issuing a power-on command to the energy storage unit, detecting the DC side voltage of the power unit 220, and then issuing a power-on command to the power unit 220 to detect the current operating power of the energy storage unit, the detection is performed on each energy storage unit and each power unit 220 of the energy storage system. This can accurately detect the misconnection between the energy storage device 100 and the energy storage converter 200 in the energy storage system. When there is abnormal information in the target detection result, the abnormal information is output to prompt, effectively preventing the system from experiencing control chaos or protection function failure.

[0176] The following is a specific example.

[0177] like Figure 5 As shown, the energy storage system is in a shutdown state and can begin self-testing; otherwise, the test ends.

[0178] The energy storage device 100 includes n energy storage units, namely sub-unit 1, sub-unit 2... sub-unit n, and the energy storage converter 200 includes n power units 220, namely PCS unit 1, PCS unit 2... PCS unit n. The detection starts from the energy storage unit n=1 and traverses each energy storage unit of the energy storage device 100.

[0179] Determine if the Battery System Controller (BSC) corresponding to subunit n is fault-free. If BSCn is fault-free, issue a power-on command to BSCn corresponding to subunit n. If BSCn is faulty, record the fault information, number it n+1, and determine the next subunit.

[0180] It is understandable that the battery system controller is the control unit of the energy storage unit, which can collect information from the battery cluster 121 and the DC-DC converter 122 in the energy storage unit and control the operation of the battery cluster 121 and the DC-DC converter 122.

[0181] If BSCn powers on and enters running mode within 4 minutes, it indicates that subunit n has not timed out and is fault-free. If BSCn fails to enter running mode within 4 minutes, it indicates that subunit n has timed out and is faulty. A shutdown order is issued to subunit n, and the abnormal unit number is recorded as n+1. The next subunit is then determined.

[0182] Subunit n enters the running state and determines whether there is DC voltage in the corresponding PCS unit n, and whether there is DC voltage in other PCS units.

[0183] If the PCS unit n corresponding to subunit n does not have DC voltage, or if other PCS units have DC voltage, it is determined that the wiring of subunit n and PCS unit n is abnormal. A shutdown order is issued to subunit n, and the abnormal unit number is recorded. The number is n+1, and the next subunit is determined.

[0184] If the PCS unit n corresponding to subunit n has a DC voltage, and other PCS units do not have a DC voltage, it is determined that there is an electrical connection between subunit n and PCS unit n, and a power-on order is issued to PCS unit n.

[0185] If PCS unit n is powered on and in running mode within 1 minute, it indicates that PCS unit n has not timed out and is fault-free. If PCS unit n fails to power on within 1 minute, it indicates that PCS unit n is faulty. A shutdown order is issued to sub-unit n, and the abnormal unit number is recorded as n+1. The next sub-unit is then determined.

[0186] When PCS unit n enters the operating state, and the state of charge (SOC) of sub-unit n is greater than 50%, a command to discharge at 10% rated power is issued, and PCS unit n discharges at the first discharge power of 10% rated power.

[0187] When the SOC corresponding to subunit n is less than or equal to 50%, a command to charge at 10% rated power is issued, and PCS unit n charges at the first charging power of 10% rated power.

[0188] Determine whether the power of subunit n and the power transmitted by PCS unit n are consistent. When the power of subunit n and the power transmitted by PCS unit n are in the same direction and the difference is less than the target power difference, it indicates that the wiring of subunit n and PCS unit n is normal, the power of subunit n and the power transmitted by PCS unit n are consistent, a stop command is issued to PCS unit n, numbered n+1, and the next subunit is determined.

[0189] The system iterates through and tests each energy storage unit and each power unit 220 of the energy storage system until all energy storage units are tested and connected. When there is an abnormal sub-unit in the energy storage system, that is, when there is an abnormality such as an energy storage unit and its corresponding power unit 220 being fault-free but having abnormal wiring, or an energy storage unit or power unit 220 being faulty, a pop-up window will be displayed to indicate all abnormal units.

[0190] In this embodiment, it is possible to accurately detect whether the energy storage units and power units 220 in the energy storage system are connected in a one-to-one correspondence, and it is also possible to check whether the energy storage units and power units 220 have malfunctions, effectively preventing the system from experiencing control chaos or protection function failure, and ensuring the stability of the energy storage system operation.

[0191] This application embodiment also provides a detection device for an energy storage system, the energy storage system including multiple energy storage units and multiple power units 220 connected accordingly.

[0192] In actual implementation, the energy storage system includes an energy storage device 100 and an energy storage converter 200. At least two energy storage units of the energy storage device 100 can be connected one-to-one with at least two power units 220 of the energy storage converter 200. Each energy storage unit includes at least one battery cluster 121 and at least one DC-DC converter 122, and the battery cluster 121 and the DC-DC converter 122 are connected one-to-one.

[0193] like Figure 6 As shown, the detection device for this energy storage system includes:

[0194] The first processing module 610 is used to send a power-on command to the first energy storage unit when the energy storage system is shut down.

[0195] The second processing module 620 is used to send a power-on command to the first power unit when the first energy storage unit enters the operating state, the DC side voltage of the first power unit corresponding to the first energy storage unit is greater than the first voltage threshold, and the DC side voltage of the power unit 220 other than the first power unit in the energy storage converter 200 is less than or equal to the first voltage threshold.

[0196] The third processing module 630 is used to obtain the current operating power of the first energy storage unit when the first power unit enters the operating state and the first power unit is charging or discharging according to the first operating power.

[0197] The fourth processing module 640 is used to determine the wiring detection result between the first energy storage unit and the first power unit based on the first operating power and the current operating power.

[0198] According to the energy storage system detection device provided in the embodiments of this application, by sending a power-on command to the energy storage unit, detecting the DC side voltage of the power unit 220, and then sending a power-on command to the power unit 220 to detect the current operating power of the energy storage unit, the device can accurately detect the misconnection of the energy storage system and effectively prevent the system from experiencing control chaos or protection function failure.

[0199] In some embodiments, the fourth processing module 640 is configured to determine the wiring detection result between the first energy storage unit and the first power unit based on the first operating power and the current operating power, including:

[0200] If the directions of the first operating power and the current operating power are different, or if the difference between the first operating power and the current operating power is greater than the difference in the target power, an abnormality in the wiring between the first energy storage unit and the first power unit is determined.

[0201] In some embodiments, the target power difference is determined based on a first operating power.

[0202] In some embodiments, the first operating power is determined based on the current state of charge of the first energy storage unit and the rated power of the first power unit.

[0203] In some embodiments, when the current state of charge of the first energy storage unit is greater than the target state of charge threshold, the first operating power is the first discharge power.

[0204] In some embodiments, when the current state of charge of the first energy storage unit is less than or equal to the target state of charge threshold, the first operating power is the first charging power.

[0205] In some embodiments, after sending a power-on command to the first energy storage unit, the second processing module 620 is further configured to determine that there is a wiring abnormality between the first energy storage unit and the first power unit when the first energy storage unit enters the operating state and the DC side voltage of the first power unit corresponding to the first energy storage unit is less than or equal to the first voltage threshold or the DC side voltage of the power unit 220 other than the first power unit in the energy storage converter 200 is greater than the first voltage threshold.

[0206] In some embodiments, after sending a power-on command to the first energy storage unit, the second processing module 620 is further configured to determine that the first energy storage unit is faulty if the power-on duration of the first energy storage unit exceeds a first duration threshold and the first energy storage unit is not powered on.

[0207] In some embodiments, after sending a power-on command to the first power unit, the fourth processing module 640 is further configured to determine that the first power unit is faulty if the power-on duration of the first power unit exceeds a second duration threshold and the first power unit is not powered on.

[0208] The detection device for the energy storage system in this application embodiment can be an electronic device or a component in an electronic device, such as an integrated circuit or a chip.

[0209] The energy storage system detection device provided in this application embodiment can achieve... Figure 3 The various processes implemented in the method implementation examples will not be described again here to avoid repetition.

[0210] This application embodiment also provides another detection device for an energy storage system, the energy storage system including a plurality of energy storage units and a plurality of power units 220 connected accordingly.

[0211] In actual implementation, the energy storage system includes an energy storage device 100 and an energy storage converter 200. At least two energy storage units of the energy storage device 100 can be connected one-to-one with at least two power units 220 of the energy storage converter 200. Each energy storage unit includes at least one battery cluster 121 and at least one DC-DC converter 122, and the battery cluster 121 and the DC-DC converter 122 are connected one-to-one.

[0212] like Figure 7 As shown, the detection device for this energy storage system includes:

[0213] The fifth processing module 710 is used to acquire the target detection results of each energy storage unit and each power unit 220 when the energy storage system is shut down.

[0214] The sixth processing module 720 is used to output abnormal information when it is determined that there is abnormal information in the target detection result;

[0215] Among them, the target detection results are based on Figure 3 The detection method for the energy storage system corresponding to the method embodiment shown is obtained.

[0216] According to the energy storage system detection device provided in the embodiments of this application, by issuing a power-on command to the energy storage unit, detecting the DC side voltage of the power unit 220, and then issuing a power-on command to the power unit 220 to detect the current operating power of the energy storage unit, the device can detect each energy storage unit and each power unit 220 of the energy storage system. This can accurately detect the misconnection between the energy storage device 100 and the energy storage converter 200 in the energy storage system. When there is abnormal information in the target detection result, the device outputs abnormal information to provide a prompt, effectively preventing the system from experiencing control chaos or protection function failure.

[0217] The detection device for the energy storage system in this application embodiment can be an electronic device or a component in an electronic device, such as an integrated circuit or a chip.

[0218] The energy storage system detection device provided in this application embodiment can achieve... Figure 4 The various processes implemented in the method implementation examples will not be described again here to avoid repetition.

[0219] This application embodiment also provides a detection system 800 for an energy storage system, the energy storage system including a plurality of energy storage units and a plurality of power units 220 connected accordingly.

[0220] In actual implementation, the energy storage system includes an energy storage device 100 and an energy storage converter 200. At least two energy storage units of the energy storage device 100 can be connected one-to-one with at least two power units 220 of the energy storage converter 200. Each energy storage unit includes at least one battery cluster 121 and at least one DC-DC converter 122, and the battery cluster 121 and the DC-DC converter 122 are connected one-to-one.

[0221] like Figure 8As shown, the detection system 800 includes a local controller 810, which includes a detection device for any of the above-mentioned energy storage systems. The local controller 810 is communicatively connected to the energy storage device 100 and the energy storage converter 200, that is, the local controller 810 is used to communicate with multiple energy storage units and multiple power units 220.

[0222] The Local Controller (LC) 810 can perform functions such as battery management, charge and discharge control, communication, and system protection.

[0223] In actual operation, the local controller 810 can communicate with the battery system controller (BSC) of the energy storage device 100 via Ethernet. The BSC summarizes the information of the battery cluster 121 and the DC-DC converter 122 and sends it to the local controller 810. The local controller 810 issues the start-up command of the energy storage unit through the BSC.

[0224] The BSC is connected to the cluster-level battery management unit (CMU) via a CAN bus to transmit and receive information with each battery cluster 121 of the energy storage device 100. The BSC also communicates with each DC-DC converter unit 122 (i.e.,...) of the energy storage device 100. Figure 8 The DC-DC converter shown is connected via Ethernet communication to realize information transmission and reception with the DC-DC converter unit 122.

[0225] The local controller 810 can communicate with the system control unit (SCU) of the energy storage converter 200 via Ethernet. The SCU collects information from each power unit 220 and sends it to the local controller 810. The local controller 810 issues power unit 220 start-up commands and sets operating power through the SCU.

[0226] In this embodiment, the local controller 810 confirms that the energy storage system is in a shutdown state. The local controller 810 sends a power-on command to the currently detected energy storage unit in the energy storage device 100. Based on the DC side voltage of each power unit 220 in the energy storage converter 200, it determines whether there is an electrical connection between the currently detected energy storage unit and the corresponding power unit 220.

[0227] After the local controller 810 determines that there is an electrical connection between the currently detected energy storage unit and the corresponding power unit 220, it sends a power-on command to the power unit 220 corresponding to the currently detected energy storage unit. Based on the operating power of the currently detected energy storage unit and the corresponding power unit 220, it determines whether the wiring between the currently detected energy storage unit and the corresponding power unit 220 is normal.

[0228] After the local controller 810 obtains the wiring detection result between the currently detected energy storage unit and the corresponding power unit 220, it controls the currently detected energy storage unit and the corresponding power unit 220 to shut down. The local controller 810 then sends a power-on command to the next detected energy storage unit, and so on.

[0229] The local controller 810 issues instructions and collects information to detect each energy storage unit and each power unit 220, and obtains the inspection results such as whether the wiring between the energy storage unit and the corresponding power unit 220 in the energy storage system is abnormal, whether the energy storage unit is faulty, and whether the power unit 220 is faulty.

[0230] In actual operation, the local controller 810 can also be connected to network switches such as NET SWITCH1# and NET SWITCH2# to realize communication functions between energy storage systems and outside of energy storage systems.

[0231] Among them, NET SWITCH2# can transmit detection results and abnormal information to the Energy Manager System (EMS) and Next Block via optical fiber.

[0232] According to the energy storage system detection system 800 provided in the embodiments of this application, the local controller 810 sends a power-on command to the energy storage unit and the power unit 220, detects the DC side voltage of the power unit 220 and the current operating power of the energy storage unit, and detects each energy storage unit and each power unit 220 of the energy storage system. It can accurately detect the misconnection between the energy storage device 100 and the energy storage converter 200 in the energy storage system. When there is abnormal information in the target detection result, the abnormal information is output to prompt, effectively preventing the system from experiencing control chaos or protection function failure.

[0233] This application also provides an energy storage system.

[0234] The energy storage system includes multiple energy storage units and multiple power units 220 connected to each other. The energy storage system also includes a detection device for the energy storage system described above, and the detection device is communicatively connected to the multiple energy storage units and multiple power units 220.

[0235] In some embodiments, the energy storage unit and the power unit 220 are connected in a one-to-one correspondence.

[0236] In some embodiments, the energy storage unit includes at least one battery cluster 121 and at least one DC-DC converter 122, with the battery cluster 121 and the DC-DC converter 122 connected in a one-to-one correspondence.

[0237] According to the energy storage system provided in the embodiments of this application, by issuing power-on commands to the energy storage unit and the power unit 220, detecting the DC side voltage of the power unit 220 and the current operating power of the energy storage unit, the system can detect each energy storage unit and each power unit 220. This can accurately detect misconnection between the energy storage device 100 and the energy storage converter 200 in the energy storage system. When there is abnormal information in the target detection result, the abnormal information is output to prompt, effectively preventing the system from experiencing control chaos or protection function failure.

[0238] In some embodiments, such as Figure 9 As shown, this application embodiment also provides an electronic device 900, including a processor 901, a memory 902, and a computer program stored in the memory 902 and executable on the processor 901. When the program is executed by the processor 901, it implements the various processes of the above-described energy storage system detection method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0239] It should be noted that the electronic devices in the embodiments of this application include the aforementioned mobile electronic devices and non-mobile electronic devices.

[0240] This application also provides a non-transitory computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the above-described energy storage system detection method embodiments and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0241] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0242] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described detection method for the energy storage system.

[0243] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0244] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described energy storage system detection method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0245] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0246] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0247] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0248] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

[0249] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0250] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for detecting an energy storage system, characterized in that, The energy storage system includes multiple energy storage units and multiple power units connected accordingly, and the method includes: In the event of a shutdown of the energy storage system, a power-on command is sent to the first energy storage unit; When the first energy storage unit enters the operating state, and the DC side voltage of the first power unit corresponding to the first energy storage unit is greater than the first voltage threshold, and the DC side voltage of the power units other than the first power unit is less than or equal to the first voltage threshold, a power-on command is sent to the first power unit. When the first power unit enters the operating state and the first power unit charges or discharges according to the first operating power, the current operating power of the first energy storage unit is obtained. Based on the first operating power and the current operating power, the wiring detection result between the first energy storage unit and the first power unit is determined.

2. The detection method for an energy storage system according to claim 1, characterized in that, The step of determining the wiring detection result between the first energy storage unit and the first power unit based on the first operating power and the current operating power includes: If the directions of the first operating power and the current operating power are different, or if the difference between the first operating power and the current operating power is greater than the target power difference, it is determined that the wiring between the first energy storage unit and the first power unit is abnormal.

3. The detection method for an energy storage system according to claim 2, characterized in that, The target power difference is determined based on the first operating power.

4. The detection method for an energy storage system according to claim 1, characterized in that, The first operating power is determined based on the current state of charge of the first energy storage unit and the rated power of the first power unit.

5. The detection method for an energy storage system according to claim 4, characterized in that, When the current state of charge of the first energy storage unit is greater than the target state of charge threshold, the first operating power is the first discharge power; when the current state of charge of the first energy storage unit is less than or equal to the target state of charge threshold, the first operating power is the first charging power.

6. The detection method for an energy storage system according to claim 1, characterized in that, After sending the power-on command to the first energy storage unit, the method further includes: If the first energy storage unit enters the operating state, and the DC side voltage of the first power unit corresponding to the first energy storage unit is less than or equal to the first voltage threshold, or the DC side voltage of the power units other than the first power unit among the plurality of power units is greater than the first voltage threshold, it is determined that the wiring between the first energy storage unit and the first power unit is abnormal.

7. The detection method for an energy storage system according to any one of claims 1-6, characterized in that, After sending the power-on command to the first energy storage unit, the method further includes: If the power-on time of the first energy storage unit exceeds a first time threshold and the first energy storage unit is not powered on, the first energy storage unit is determined to be faulty.

8. The detection method for an energy storage system according to any one of claims 1-6, characterized in that, After sending the power-on command to the first power unit, the method further includes: If the power-on duration of the first power unit exceeds the second duration threshold and the first power unit is not powered on, the first power unit is determined to be faulty.

9. A method for detecting an energy storage system, characterized in that, The energy storage system includes multiple energy storage units and multiple power units connected accordingly, and the method includes: In the event that the energy storage system is shut down, the target detection results of each of the energy storage units and each of the power units are obtained; If it is determined that there is abnormal information in the target detection result, the abnormal information is output; The target detection result is obtained based on the detection method of the energy storage system according to any one of claims 1-8.

10. A detection device for an energy storage system, characterized in that, The energy storage system includes multiple energy storage units and multiple power units connected accordingly, and the device includes: The first processing module is used to send a power-on command to the first energy storage unit when the energy storage system is shut down; The second processing module is used to send a power-on command to the first power unit when the first energy storage unit enters the operating state, the DC side voltage of the first power unit corresponding to the first energy storage unit is greater than the first voltage threshold, and the DC side voltage of the power units other than the first power unit among the plurality of power units is less than or equal to the first voltage threshold. The third processing module is used to obtain the current operating power of the first energy storage unit when the first power unit enters the operating state and the first power unit is charging or discharging according to the first operating power. The fourth processing module is used to determine the wiring detection result between the first energy storage unit and the first power unit based on the first operating power and the current operating power.

11. A detection device for an energy storage system, characterized in that, The energy storage system includes multiple energy storage units and multiple power units connected accordingly, and the device includes: The fifth processing module is used to acquire the target detection results of each of the energy storage units and each of the power units when the energy storage system is shut down. The sixth processing module is used to output the abnormal information when it is determined that there is abnormal information in the target detection result; The target detection result is obtained based on the detection method of the energy storage system according to any one of claims 1-8.

12. A detection system for an energy storage system, characterized in that, The energy storage system includes multiple energy storage units and multiple power units connected accordingly, and the detection system includes: A local controller, comprising a detection device for the energy storage system as described in claim 10 or 11, the local controller being configured to communicate with the plurality of energy storage units and the plurality of power units.

13. An energy storage system, characterized in that, include: Correspondingly connected to multiple energy storage units and multiple power units; The detection device for the energy storage system as described in claim 10 or 11, wherein the detection device is communicatively connected to the plurality of energy storage units and the plurality of power units.

14. The energy storage system according to claim 13, characterized in that, The energy storage unit and the power unit are connected in a one-to-one correspondence.

15. The energy storage system according to claim 13 or 14, characterized in that, The energy storage unit includes at least one battery cluster and at least one DC-DC converter, with the battery cluster and the DC-DC converter connected in a one-to-one correspondence.

16. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the detection method for the energy storage system as described in any one of claims 1-9.

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