Fault diagnosis method and device of energy storage system, electronic equipment and storage medium

Abstract

The invention provides a fault diagnosis method and device for an energy storage system, electronic equipment and a storage medium, and the method comprises the steps: detecting the temperature of a corresponding temperature measurement point in the energy storage system through a plurality of temperature sensors; determining that the temperature sensor corresponding to the ith temperature measurement point has a fault in response to the abnormality of the temperature change parameter of the ith temperature measurement point; and / or determining that at least one of the temperature sensor, the copper bar and the battery cell corresponding to the jth temperature measurement point has a fault in response to the outlier of the temperature of the jth temperature measurement point; and / or, in response to the over-temperature abnormity of the battery pack in the energy storage system, determining that the liquid cooling unit in the energy storage system has a fault. Therefore, the fault reasons of various temperature abnormalities of the energy storage system can be comprehensively and accurately judged, the fault source of the energy storage system can be timely positioned, and the safety and reliability of the energy storage system are improved.

Description

Technical Field

[0001] The present application relates to the field of energy and power technology, and in particular to a fault diagnosis method, device, electronic device and storage medium for an energy storage system. Background Art

[0002] At present, the energy storage system may have temperature anomalies. In order to timely discover and eliminate the source of the energy storage system failure, it is necessary to identify the cause of the temperature anomaly of the energy storage system. However, in the related art, the fault diagnosis method of the temperature anomaly of the energy storage system has the problem of a relatively single fault cause and low accuracy. Summary of the invention

[0003] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0004] To this end, the first objective of the present application is to propose a fault diagnosis method for an energy storage system.

[0005] The second objective of the present application is to provide a fault diagnosis device for an energy storage system.

[0006] The third objective of the present application is to provide an electronic device.

[0007] A fourth objective of the present application is to provide a computer-readable storage medium.

[0008] A fifth object of the present application is to provide a computer program product.

[0009] To achieve the above-mentioned purpose, the first aspect of the present application proposes a fault diagnosis method for an energy storage system, comprising: detecting the temperatures of the corresponding temperature measuring points in the energy storage system through multiple temperature sensors; in response to an abnormality in the temperature change parameter of the i-th temperature measuring point, determining that the temperature sensor corresponding to the i-th temperature measuring point is faulty; and / or, in response to an outlier in the temperature of the j-th temperature measuring point, determining that at least one of the temperature sensor, copper bus, and battery cell corresponding to the j-th temperature measuring point is faulty; and / or, in response to an overtemperature abnormality in the battery pack in the energy storage system, determining that the liquid cooling unit in the energy storage system is faulty; wherein N is the number of temperature measuring points in the energy storage system, and i and j are both positive integers not greater than N.

[0010] To achieve the above-mentioned purpose, the second aspect of the present application proposes a fault diagnosis device for an energy storage system, comprising: a detection module, which is used to detect the temperatures of the corresponding temperature measuring points in the energy storage system through multiple temperature sensors; a fault diagnosis module, which is used to determine that the temperature sensor corresponding to the i-th temperature measuring point is faulty in response to an abnormal temperature change parameter of the i-th temperature measuring point; and / or, the fault diagnosis module is used to determine that at least one of the temperature sensor, copper bus, and battery cell corresponding to the j-th temperature measuring point is faulty in response to an outlier in the temperature of the j-th temperature measuring point; and / or, the fault diagnosis module is used to determine that the liquid cooling unit in the energy storage system is faulty in response to an over-temperature abnormality in the battery pack in the energy storage system; wherein N is the number of temperature measuring points in the energy storage system, and i and j are both positive integers not greater than N.

[0011] To achieve the above-mentioned purpose, the third aspect embodiment of the present application proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method described in the first aspect embodiment above.

[0012] To achieve the above-mentioned purpose, the fourth aspect embodiment of the present application proposes a computer-readable storage medium, in which computer execution instructions are stored. When the computer execution instructions are executed by a processor, they are used to implement the method described in the first aspect embodiment above.

[0013] To achieve the above-mentioned purpose, the fifth aspect of the present application proposes a computer program product, including a computer program, which, when executed by a processor, implements the method described in the first aspect of the present application.

[0014] The energy storage system fault diagnosis method, device, electronic device and storage medium provided in the present application can determine that a temperature sensor corresponding to a certain temperature measuring point in the energy storage system has a fault when a temperature change parameter of the temperature measuring point in the energy storage system is abnormal, and / or, when the temperature of a certain temperature measuring point is outliers, determine that at least one of the temperature sensor, copper busbar and battery cell corresponding to the temperature measuring point has a fault, and / or, when an over-temperature abnormality occurs in a certain battery pack in the energy storage system, determine that a liquid cooling unit in the energy storage system has a fault, and can comprehensively and accurately identify the fault causes of various temperature abnormalities in the energy storage system, help to timely locate the fault source of the energy storage system, and improve the safety and reliability of the energy storage system.

[0015] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0017] Figure 1 A schematic diagram of a flow chart of a method for diagnosing a fault of an energy storage system provided in an embodiment of the present application;

[0018] Figure 2 A schematic flow chart of another method for diagnosing a fault of an energy storage system provided in an embodiment of the present application;

[0019] Figure 3 A schematic flow chart of another method for diagnosing a fault of an energy storage system provided in an embodiment of the present application;

[0020] Figure 4 A schematic diagram of the structure of a fault diagnosis device for an energy storage system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0022] The following describes a fault diagnosis method, device, electronic device, and storage medium for an energy storage system according to an embodiment of the present application with reference to the accompanying drawings.

[0023] Figure 1 A schematic flow chart of a method for diagnosing a fault in an energy storage system provided in an embodiment of the present application.

[0024] At present, the energy storage system may have temperature anomalies. In order to timely discover and eliminate the source of the energy storage system failure, it is necessary to identify the cause of the temperature anomaly of the energy storage system. However, in the related art, the fault diagnosis method of the temperature anomaly of the energy storage system has the problem of a relatively single fault cause and low accuracy.

[0025] To address this problem, an embodiment of the present application provides a fault diagnosis method for an energy storage system, which can determine that a temperature sensor corresponding to a certain temperature measuring point in the energy storage system has a fault when a temperature change parameter of the temperature measuring point in the energy storage system is abnormal, and / or, when the temperature of a certain temperature measuring point is outliers, determine that at least one of the temperature sensor, copper bus, and battery cell corresponding to the temperature measuring point has a fault, and / or, when an overtemperature abnormality occurs in a certain battery pack in the energy storage system, determine that a liquid cooling unit in the energy storage system has a fault. The fault causes of various temperature abnormalities in the energy storage system can be comprehensively and accurately determined, which helps to timely locate the fault source of the energy storage system and improve the safety and reliability of the energy storage system.

[0026] like Figure 1 As shown, the method comprises the following steps:

[0027] S101, detecting the temperatures of corresponding temperature measurement points in the energy storage system by using a plurality of temperature sensors.

[0028] It should be noted that Figures 1 to 3 The execution subject of the fault diagnosis method of the energy storage system shown is an electronic device, such as a BMS (Battery Management System), a server, etc.

[0029] It should be noted that there are no excessive restrictions on temperature sensors, for example, they may include NTC (Negative Temperature Coefficient) sensors, thermocouples, infrared temperature sensors, semiconductor temperature sensors, etc. The energy storage system includes multiple temperature measurement points, and there is a corresponding relationship between the temperature sensors and the temperature measurement points, for example, the temperature sensors and the temperature measurement points correspond one to one. It is understandable that the energy storage system includes multiple battery packs, and at least one temperature measurement point is arranged on a battery pack.

[0030] S102, in response to an abnormality in a temperature change parameter of the i-th temperature measuring point, determining that a temperature sensor corresponding to the i-th temperature measuring point is faulty.

[0031] In the embodiment of the present disclosure, at least one of steps S102 - S104 may be executed, and there is no excessive limitation on the execution order of steps S102 - S104 , for example, they may be executed in parallel or in series.

[0032] It should be noted that N is the number of temperature measurement points in the energy storage system, and i and j are both positive integers not greater than N. There are no excessive restrictions on the temperature change parameters, such as the temperature change amount, the temperature change speed, etc. The temperature change parameters of the temperature measurement points are abnormal, which may include that the temperature change parameters of the temperature measurement points are greater than the set threshold and / or are not within the set range, etc., and no excessive restrictions are made here.

[0033] In one embodiment, the method further includes obtaining the absolute value of the temperature change at the i-th temperature measuring point in multiple detection time periods, obtaining the target number of absolute values ​​greater than a first set threshold, and determining that the temperature change parameter at the i-th temperature measuring point is abnormal in response to the target number being greater than a second set threshold. Thus, when the absolute value of the temperature change at a certain temperature measuring point is large for multiple times, it can be determined that the temperature change parameter at the temperature measuring point is abnormal.

[0034] It should be noted that there are not too many restrictions on the length of the detection time period, for example, it can be 1 minute, there are not too many restrictions on the first set threshold, for example, it can be 2°C (degrees Celsius), and there are not too many restrictions on the second set threshold, for example, it can be 10.

[0035] In some examples, obtaining the target number of absolute values ​​greater than the first set threshold may include obtaining the target number of absolute values ​​greater than the first set threshold within a fifth set time period. It should be noted that the fifth set time period is not too limited, for example, it may include one day, one week, etc.

[0036] In one embodiment, the method further includes obtaining the temperature change rate of the i-th temperature measuring point in multiple detection time periods, obtaining a first number of temperature change rates greater than a set change rate, and determining that the temperature change parameter of the i-th temperature measuring point is abnormal in response to the first number being greater than a third set threshold. Thus, when a temperature change rate at a certain temperature measuring point is large for multiple times, it can be determined that the temperature change parameter of the temperature measuring point is abnormal.

[0037] It should be noted that there are not too many restrictions on the setting change speed, for example, it can be 2°C / min (degrees Celsius / minute), that is, a change of 2°C per minute, and there is not too many restrictions on the third setting threshold, for example, it can be 10.

[0038] In one embodiment, the method further includes obtaining the absolute value of the temperature change amount and the temperature change rate of the i-th temperature measuring point in multiple detection time periods, and in response to at least one absolute value of the temperature change amount being greater than a first set threshold value, and / or at least one temperature change rate being greater than a set change rate, determining that the temperature change parameter of the i-th temperature measuring point is abnormal. Thus, when the temperature change amount and / or the temperature change rate of a certain temperature measuring point are large, it can be determined that the temperature change parameter of the temperature measuring point is abnormal.

[0039] S103, in response to the temperature of the j-th temperature measuring point being outliers, determining that at least one of the temperature sensor, the copper busbar, and the battery cell corresponding to the j-th temperature measuring point is faulty.

[0040] It should be noted that the copper bar corresponding to the temperature measuring point may include the copper bar where the temperature measuring point is located, the copper bar around the temperature measuring point, etc., wherein the copper bar around the temperature measuring point refers to the copper bar located in the surrounding area of ​​the temperature measuring point, for example, it may include the copper bar within a set distance from the temperature measuring point. Faults of the copper bar may include faults such as cold soldering, looseness, and corrosion of the copper bar.

[0041] It should be noted that the battery cell corresponding to the temperature measuring point refers to the battery cell where the temperature measuring point is located.

[0042] It should be noted that the identification of whether the temperature of the temperature measurement point is outlier can be achieved by using any outlier detection method in the relevant technology, which is not limited here. Among them, the outlier detection method may include LOF (Local Outlier Factor), outlier detection method based on Z-Score (standard score), COF (Connectivity-Based Outlier Factor), KNN (K-Nearest Neighbors), etc.

[0043] In one embodiment, the method further includes obtaining a local outlier factor of the temperature of the jth temperature measuring point, and in response to the local outlier factor of the temperature of the jth temperature measuring point being greater than a fourth set threshold, determining that the temperature of the jth temperature measuring point is outlier. It should be noted that obtaining the local outlier factor of the temperature of the jth temperature measuring point can be implemented by using any LOF method in the relevant technology, and no further limitation is made here.

[0044] In one embodiment, in response to the temperature of the jth temperature measuring point being outliers, it is determined that at least one of the temperature sensor, copper busbar, and battery cell corresponding to the jth temperature measuring point is faulty, including in response to the temperature of the jth temperature measuring point being outliers when the energy storage system is in a charging and discharging state and a static state, it is determined that the temperature sensor corresponding to the jth temperature measuring point is faulty. Thus, when the temperature of a certain temperature measuring point is outliers when the energy storage system is in a charging and discharging state and a static state, it can be determined that the temperature sensor corresponding to the temperature measuring point is faulty.

[0045] It should be noted that the charge and discharge state in the embodiments of the present disclosure refers to the charge state and / or the discharge state.

[0046] In one embodiment, in response to the temperature of the jth temperature measuring point being outliers, it is determined that at least one of the temperature sensor, copper busbar, and battery cell corresponding to the jth temperature measuring point is faulty, including in response to the temperature of the jth temperature measuring point being outliers when the energy storage system is in a charging and discharging state, and the temperature of the jth temperature measuring point not being outliers when the energy storage system is in a static state, determining that the copper busbar and / or battery cell corresponding to the jth temperature measuring point is faulty. Thus, when the temperature of a certain temperature measuring point is outliers when the energy storage system is in a charging and discharging state, and the temperature of the temperature measuring point is not outliers when the energy storage system is in a static state, it can be determined that the copper busbar and / or battery cell corresponding to the temperature measuring point is faulty.

[0047] In some examples, determining that the copper bar and / or battery cell corresponding to the jth temperature measuring point is faulty includes determining that the copper bar where the jth temperature measuring point is located is faulty in response to the jth temperature measuring point being located at the copper bar, determining that the copper bar around the jth temperature measuring point is faulty in response to the jth temperature measuring point not being located at the copper bar and the copper bar being present in the surrounding area of ​​the jth temperature measuring point, and determining that the battery cell corresponding to the jth temperature measuring point is faulty in response to the jth temperature measuring point not being located at the copper bar and the copper bar being absent in the surrounding area of ​​the jth temperature measuring point. Thus, in the case where the temperature of a certain temperature measuring point is outlier, when the temperature measuring point is located at the copper bar, it can be determined that the copper bar where the temperature measuring point is located is faulty, when the temperature measuring point is not located at the copper bar and the copper bar is present in the surrounding area, it can be determined that the copper bar around the temperature measuring point is faulty, and when the temperature measuring point is not located at the copper bar and the copper bar is present in the surrounding area, it can be determined that the battery cell corresponding to the temperature measuring point is faulty.

[0048] S104, in response to an over-temperature abnormality of a battery pack in the energy storage system, determining that a liquid cooling unit in the energy storage system is faulty.

[0049] It should be noted that the over-temperature abnormality of the battery pack may include the temperature of the battery pack being greater than a set threshold, etc., which is not excessively limited here.

[0050] In one embodiment, the method further includes obtaining a fourth duration during which the maximum temperature of the battery pack is greater than the first set temperature and the minimum temperature of the battery pack is greater than the second set temperature, wherein the first set temperature is greater than or equal to the second set temperature, and in response to the fourth duration being greater than the fourth set duration, determining that the battery pack has an over-temperature anomaly. Thus, when the maximum temperature and minimum temperature of a battery pack are both greater for a longer duration, it can be determined that the battery pack has an over-temperature anomaly.

[0051] It should be noted that there are no excessive restrictions on the first and second set temperatures, for example, the first set temperature is 40°C, the second set temperature is 35°C, and there is no excessive restriction on the fourth set time, for example, it can be 10 minutes. The highest temperature and the lowest temperature of the battery pack are derived from different temperature measurement points on the battery pack.

[0052] In one embodiment, the method further includes determining that the battery pack has an over-temperature anomaly in response to the temperature of the battery pack being greater than a third set temperature. Thus, when the temperature of a battery pack is relatively high, it can be determined that the battery pack has an over-temperature anomaly. It is understandable that there are no excessive restrictions on the temperature of the battery pack, for example, it can be the temperature of any temperature measurement point on the battery pack, for example, it can include the highest temperature, the lowest temperature, etc. of the battery pack.

[0053] In one embodiment, the method further includes determining that the battery pack has an over-temperature anomaly in response to the temperature of the battery pack being greater than the third set temperature for a fifth duration greater than the fifth set duration. Thus, when the temperature of a battery pack is greater for a longer duration, it can be determined that the battery pack has an over-temperature anomaly.

[0054] It should be noted that there are no excessive restrictions on the third set temperature, for example, it can be 35° C., and there are no excessive restrictions on the fifth set time, for example, it can be 10 minutes.

[0055] In summary, according to the fault diagnosis method of the energy storage system of the embodiment of the present application, the temperatures of the corresponding temperature measuring points in the energy storage system are detected by multiple temperature sensors, and in response to an abnormality in the temperature change parameter of the i-th temperature measuring point, it is determined that the temperature sensor corresponding to the i-th temperature measuring point is faulty, and / or, in response to an outlier in the temperature of the j-th temperature measuring point, it is determined that at least one of the temperature sensor, copper bus, and battery cell corresponding to the j-th temperature measuring point is faulty, and / or, in response to an overtemperature anomaly in the battery pack in the energy storage system, it is determined that the liquid cooling unit in the energy storage system is faulty, wherein N is the number of temperature measuring points in the energy storage system, and i and j are both positive integers not greater than N. Therefore, when a temperature change parameter of a certain temperature measuring point in the energy storage system is abnormal, it can be determined that the temperature sensor corresponding to the temperature measuring point is faulty, and / or, when the temperature of a certain temperature measuring point is outliers, it can be determined that at least one of the temperature sensor, copper busbar, and battery cell corresponding to the temperature measuring point is faulty, and / or, when an overtemperature abnormality occurs in a certain battery pack in the energy storage system, it can be determined that the liquid cooling unit in the energy storage system is faulty. The causes of various temperature abnormalities in the energy storage system can be comprehensively and accurately identified, which helps to locate the fault source of the energy storage system in a timely manner, thereby improving the safety and reliability of the energy storage system.

[0056] An embodiment of the present application provides another method for diagnosing faults in an energy storage system.

[0057] like Figure 2 As shown, the method may include the following steps:

[0058] S201, detecting the temperatures of corresponding temperature measurement points in the energy storage system by using a plurality of temperature sensors.

[0059] For the relevant contents of step S201, please refer to the above embodiment, which will not be described again here.

[0060] S202, in response to the energy storage system being in a charging and discharging state and the temperature of the j-th temperature measuring point being outliers, a first duration of the temperature of the j-th temperature measuring point being outliers is obtained.

[0061] S203, in response to the energy storage system being in a static state and the temperature of the j-th temperature measuring point being outliers, obtaining a second duration of the temperature of the j-th temperature measuring point being outliers.

[0062] It should be noted that there are no excessive restrictions on the execution order of steps S202-S203. For example, the execution order of step S202 is before the execution order of step S203, or the execution order of step S202 is after the execution order of step S203.

[0063] It should be noted that the first duration refers to the duration during which the temperature of the jth temperature measuring point appears outlier when the energy storage system is in the charging and discharging state, and the second duration refers to the duration during which the temperature of the jth temperature measuring point appears outlier when the energy storage system is in the static state.

[0064] In one embodiment, in response to the energy storage system being in a static state, before the temperature of the jth temperature measurement point becomes outlier, it also includes identifying that the third duration of the energy storage system being in a static state is greater than the third set duration. Thus, step S203 can be continued only when the duration of the energy storage system being in a static state is longer.

[0065] It should be noted that there are no excessive restrictions on the third set time length, for example, it can be 120 minutes.

[0066] In one embodiment, after obtaining the first duration of the outlier appearance of the temperature at the j-th temperature measurement point, the method further includes controlling the energy storage system to switch from the charge-discharge state to the static state in response to the first duration being greater than the first set duration. Thus, when the energy storage system is in the charge-discharge state and the temperature at a certain temperature measurement point is outlier for a long duration, the energy storage system can be controlled to switch from the charge-discharge state to the static state to continue to determine whether the temperature at the temperature measurement point is outlier when the energy storage system is in the static state.

[0067] S204: In response to the first duration being greater than the first set duration and the second duration being greater than the second set duration, it is determined that a temperature sensor corresponding to the j-th temperature measurement point is faulty.

[0068] It should be noted that there are no excessive restrictions on the first and second set time lengths, and the first and second set time lengths may be different or the same. For example, the first and second set time lengths are both 60 minutes.

[0069] S205: In response to the first duration being greater than the first set duration and the second duration being less than or equal to the second set duration, it is determined that the copper busbar and / or the battery cell corresponding to the j-th temperature measurement point is faulty.

[0070] It should be noted that, for the relevant contents of determining whether the copper busbar and / or battery cell corresponding to the j-th temperature measurement point is faulty, reference may be made to the above embodiments, and no further limitation is made here.

[0071] In summary, according to the fault diagnosis method of the energy storage system in the embodiment of the present application, when the temperature of a certain temperature measuring point appears outliers when the energy storage system is in a charging and discharging state and in a static state, and both appear outliers for a long time, it is determined that the temperature sensor corresponding to the temperature measuring point has a fault; or, when the temperature of a certain temperature measuring point appears outliers for a long time when the energy storage system is in a charging and discharging state, and when the temperature of the temperature measuring point appears outliers for a short time when the energy storage system is in a static state, it is determined that the copper bus and / or battery cell corresponding to the temperature measuring point has a fault.

[0072] An embodiment of the present application provides another method for diagnosing faults in an energy storage system.

[0073] like Figure 3 As shown, the method may include the following steps:

[0074] S301, detecting the temperatures of corresponding temperature measurement points in the energy storage system by using a plurality of temperature sensors.

[0075] S302, identifying whether the temperature of the jth temperature measurement point is outlier when the energy storage system is in a charging and discharging state.

[0076] If yes, execute step S303.

[0077] S303, identifying whether a first duration during which the temperature of the j-th temperature measurement point is outliers is greater than a first set duration.

[0078] If yes, execute step S304.

[0079] S304, controlling the energy storage system to switch from the charging and discharging state to the static state, and identifying that a third continuous time length of the energy storage system being in the static state is greater than a third set time length.

[0080] S305, identifying whether the temperature of the jth temperature measurement point is outlier when the energy storage system is in a static state.

[0081] If yes, execute step S306; if no, execute step S308.

[0082] S306, identifying whether the second duration of the outlier temperature at the j-th temperature measurement point is greater than a second set duration.

[0083] If yes, execute step S307; if no, execute step S308.

[0084] S307, determining that the temperature sensor corresponding to the j-th temperature measurement point is faulty.

[0085] S308, identifying whether the j-th temperature measurement point is located at the copper busbar.

[0086] If yes, execute step S309; ​​if no, execute step S310.

[0087] S309, determining that the copper busbar where the j-th temperature measuring point is located is faulty.

[0088] S310, identifying whether there is a copper busbar in the surrounding area of ​​the j-th temperature measurement point.

[0089] If yes, execute step S311; if no, execute step S312.

[0090] S311, determining that the copper busbar around the j-th temperature measurement point is faulty.

[0091] S312, determining that the battery cell corresponding to the j-th temperature measurement point is faulty.

[0092] For the relevant contents of steps S301 - S312 , please refer to the above embodiments and will not be described again here.

[0093] In order to implement the above embodiments, the present application also proposes a fault diagnosis device for an energy storage system.

[0094] Figure 4 A schematic diagram of the structure of a fault diagnosis device for an energy storage system provided in an embodiment of the present application.

[0095] like Figure 4 As shown, the fault diagnosis device 100 of the energy storage system includes: a detection module 110 and a fault diagnosis module 120 .

[0096] A detection module 110 is used to detect the temperatures of corresponding temperature measurement points in the energy storage system through a plurality of temperature sensors;

[0097] The fault diagnosis module 120 is used to determine that the temperature sensor corresponding to the i-th temperature measurement point is faulty in response to an abnormality in the temperature change parameter of the i-th temperature measurement point; and / or,

[0098] The fault diagnosis module 120 is used to determine that at least one of the temperature sensor corresponding to the jth temperature measurement point, the copper busbar around the jth temperature measurement point, and the battery cell corresponding to the jth temperature measurement point is faulty in response to the temperature of the jth temperature measurement point being outliers; and / or

[0099] The fault diagnosis module 120 is used to determine that a liquid cooling unit in the energy storage system has a fault in response to an over-temperature abnormality of a battery pack in the energy storage system; wherein,

[0100] N is the number of temperature measurement points in the energy storage system, and i and j are both positive integers not greater than N.

[0101] Furthermore, in a possible implementation of the embodiment of the present application, the fault diagnosis module 120 is also used to: in response to the temperature of the j-th temperature measurement point being outliers when the energy storage system is in a charging and discharging state and a static state, determine that the temperature sensor corresponding to the j-th temperature measurement point is faulty.

[0102] Furthermore, in a possible implementation of an embodiment of the present application, the fault diagnosis module 120 is also used for: in response to the energy storage system being in a charging and discharging state, the temperature of the j-th temperature measuring point being outlier, and the energy storage system being in a static state, the temperature of the j-th temperature measuring point being not outlier, determining that the copper busbar around the j-th temperature measuring point and / or the battery cell corresponding to the j-th temperature measuring point is faulty.

[0103] Further, in a possible implementation of the embodiment of the present application, the fault diagnosis module 120 is also used for: in response to the energy storage system being in a charging and discharging state, the temperature of the j-th temperature measuring point is outlier, obtaining a first duration of the temperature of the j-th temperature measuring point being outlier; in response to the energy storage system being in a static state, the temperature of the j-th temperature measuring point is outlier, obtaining a second duration of the temperature of the j-th temperature measuring point being outlier; in response to the first duration being greater than a first set duration, and the second duration being greater than a second set duration, determining that the temperature sensor corresponding to the j-th temperature measuring point is faulty.

[0104] Furthermore, in a possible implementation of an embodiment of the present application, the fault diagnosis module 120 is also used to: in response to the first duration being greater than the first set duration, and the second duration being less than or equal to the second set duration, determine that the copper bus around the jth temperature measuring point and / or the battery cell corresponding to the jth temperature measuring point is faulty.

[0105] Furthermore, in a possible implementation of the embodiment of the present application, the fault diagnosis module 120 is also used to: in response to the presence of a copper busbar in the surrounding area of ​​the j-th temperature measuring point, determine that the copper busbar around the j-th temperature measuring point is faulty; in response to the absence of a copper busbar in the surrounding area of ​​the j-th temperature measuring point, determine that the battery cell corresponding to the j-th temperature measuring point is faulty.

[0106] Furthermore, in a possible implementation of the embodiment of the present application, in response to the energy storage system being in a static state, before the temperature of the j-th temperature measurement point becomes outlier, the fault diagnosis module 120 is also used to: identify that a third duration of the energy storage system being in a static state is greater than a third set duration.

[0107] Furthermore, in a possible implementation of an embodiment of the present application, the fault diagnosis module 120 is also used to: obtain the absolute value of the temperature change of the i-th temperature measuring point within multiple detection time periods; obtain the target number of the absolute value greater than a first set threshold; in response to the target number being greater than a second set threshold, determine that the temperature change parameter of the i-th temperature measuring point is abnormal.

[0108] Furthermore, in a possible implementation of the embodiment of the present application, the fault diagnosis module 120 is also used to: obtain a fourth duration during which the maximum temperature of the battery pack is greater than a first set temperature and the minimum temperature of the battery pack is greater than a second set temperature, wherein the first set temperature is greater than or equal to the second set temperature; in response to the fourth duration being greater than the fourth set duration, determine that the battery pack has an overtemperature abnormality.

[0109] It should be noted that the above explanation of the embodiment of the method for diagnosing a fault of an energy storage system is also applicable to the device for diagnosing a fault of an energy storage system of this embodiment, and will not be described in detail here.

[0110] In summary, the fault diagnosis device of the energy storage system of the embodiment of the present application detects the temperatures of the corresponding temperature measuring points in the energy storage system through multiple temperature sensors, and in response to an abnormal temperature change parameter of the i-th temperature measuring point, determines that the temperature sensor corresponding to the i-th temperature measuring point has a fault, and / or, in response to an outlier in the temperature of the j-th temperature measuring point, determines that at least one of the temperature sensor, copper bus, and battery cell corresponding to the j-th temperature measuring point has a fault, and / or, in response to an overtemperature abnormality in the battery pack in the energy storage system, determines that the liquid cooling unit in the energy storage system has a fault, wherein N is the number of temperature measuring points in the energy storage system, and i and j are both positive integers not greater than N. Therefore, when a temperature change parameter of a certain temperature measuring point in the energy storage system is abnormal, it can be determined that the temperature sensor corresponding to the temperature measuring point is faulty, and / or, when the temperature of a certain temperature measuring point is outliers, it can be determined that at least one of the temperature sensor, copper busbar, and battery cell corresponding to the temperature measuring point is faulty, and / or, when an overtemperature abnormality occurs in a certain battery pack in the energy storage system, it can be determined that the liquid cooling unit in the energy storage system is faulty. The causes of various temperature abnormalities in the energy storage system can be comprehensively and accurately identified, which helps to locate the fault source of the energy storage system in a timely manner, thereby improving the safety and reliability of the energy storage system.

[0111] In order to implement the above embodiments, the present application also proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method provided by the above embodiments.

[0112] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.

[0113] In order to implement the above embodiments, the present application also proposes a computer program product, including a computer program, which implements the methods provided by the above embodiments when executed by a processor.

[0114] The collection, storage, use, processing, transmission, provision and disclosure of user personal information involved in this application are in compliance with relevant laws and regulations and do not violate public order and good morals.

[0115] It should be noted that personal information from users should be collected for legitimate and reasonable purposes and should not be shared or sold outside of these legitimate uses. In addition, such collection / sharing should be carried out after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign the agreement / authorization including authorization of relevant user information before the user uses the function. In addition, any necessary steps should be taken to protect and safeguard access to such personal information data and ensure that others who have access to personal information data comply with its privacy policy and procedures.

[0116] The present application is expected to provide an implementation scheme for users to selectively block the use or access of personal information data. That is, the present disclosure is expected to provide hardware and / or software to prevent or block access to such personal information data. Once the personal information data is no longer needed, the risk can be minimized by limiting data collection and deleting the data. In addition, when applicable, such personal information is de-identified to protect the privacy of the user.

[0117] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0118] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood to control or imply relative importance or implicitly indicate the number of technical features controlled. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0119] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0120] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0121] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0122] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0123] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0124] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A fault diagnosis method for an energy storage system, characterized in that: include: Detecting the temperatures of corresponding temperature measuring points in the energy storage system through multiple temperature sensors; In response to an abnormality in a temperature change parameter of the i-th temperature measuring point, determining that a temperature sensor corresponding to the i-th temperature measuring point is faulty; and / or, In response to the temperature of the j-th temperature measuring point being outliers, determining that at least one of the temperature sensor, the copper bus, and the battery cell corresponding to the j-th temperature measuring point is faulty; and / or, In response to an over-temperature abnormality of a battery pack in the energy storage system, it is determined that a liquid cooling unit in the energy storage system has failed; wherein, N is the number of temperature measurement points in the energy storage system, and i and j are both positive integers not greater than N.

2. The method according to claim 1, characterized in that In response to the temperature of the j-th temperature measuring point being outliers, determining that at least one of the temperature sensor, the copper bus, and the battery cell corresponding to the j-th temperature measuring point is faulty includes: In response to the temperature of the j-th temperature measuring point being outliers when the energy storage system is in a charging and discharging state and a static state, it is determined that a temperature sensor corresponding to the j-th temperature measuring point is faulty.

3. The method according to claim 1, characterized in that In response to the temperature of the j-th temperature measuring point being outliers, determining that at least one of the temperature sensor, the copper bus, and the battery cell corresponding to the j-th temperature measuring point is faulty includes: In response to the energy storage system being in a charging and discharging state, the temperature of the j-th temperature measuring point is outlier, and the energy storage system is in a static state, the temperature of the j-th temperature measuring point is not outlier, it is determined that the copper bus and / or battery cell corresponding to the j-th temperature measuring point is faulty.

4. The method according to claim 1, characterized in that: In response to the temperature of the j-th temperature measuring point being outliers, determining that at least one of the temperature sensor, the copper bus, and the battery cell corresponding to the j-th temperature measuring point is faulty includes: In response to the energy storage system being in a charging and discharging state, the temperature of the j-th temperature measuring point is outliers, obtaining a first duration of the outliers in the temperature of the j-th temperature measuring point; In response to the energy storage system being in a static state, the temperature of the j-th temperature measuring point is outliers, obtaining a second duration of the temperature of the j-th temperature measuring point being outliers; In response to the first duration being greater than a first set duration and the second duration being greater than a second set duration, it is determined that a temperature sensor corresponding to the j-th temperature measurement point is faulty.

5. The method according to claim 4, characterized in that The method further comprises: In response to the first duration being greater than the first set duration and the second duration being less than or equal to the second set duration, it is determined that the copper bus and / or the battery cell corresponding to the j-th temperature measurement point is faulty.

6. The method according to claim 3 or 5, characterized in that: The determining that the copper busbar and / or the battery cell corresponding to the j-th temperature measurement point is faulty includes: In response to the j-th temperature measuring point being located at the copper busbar, determining that the copper busbar where the j-th temperature measuring point is located is faulty; In response to the j-th temperature measuring point not being located at the copper busbar, and the copper busbar being present in the surrounding area of ​​the j-th temperature measuring point, determining that the copper busbar around the j-th temperature measuring point is faulty; In response to the j-th temperature measuring point not being located on the copper busbar and the copper busbar not existing in the surrounding area of ​​the j-th temperature measuring point, it is determined that the battery cell corresponding to the j-th temperature measuring point is faulty.

7. The method according to claim 4, characterized in that In response to the energy storage system being in a static state, before the temperature of the j-th temperature measurement point becomes outlier, the method further includes: It is identified that a third duration during which the energy storage system is in a static state is greater than a third set duration.

8. The method according to any one of claims 1 to 7, characterized in that The method further comprises: Obtaining the absolute value of the temperature change of the i-th temperature measurement point in multiple detection time periods; Obtaining a target number of the absolute values ​​greater than a first set threshold; In response to the target number being greater than a second set threshold, it is determined that a temperature change parameter of the i-th temperature measurement point is abnormal.

9. The method according to any one of claims 1 to 7, characterized in that: The method further comprises: Obtaining a fourth duration during which the maximum temperature of the battery pack is greater than a first set temperature and the minimum temperature of the battery pack is greater than a second set temperature, wherein the first set temperature is greater than or equal to the second set temperature; In response to the fourth duration being greater than a fourth set duration, it is determined that an over-temperature abnormality occurs in the battery pack.

10. A fault diagnosis device for an energy storage system, characterized in that: include: A detection module, used to detect the temperatures of corresponding temperature measurement points in the energy storage system through multiple temperature sensors; a fault diagnosis module, for determining that a temperature sensor corresponding to the i-th temperature measurement point is faulty in response to an abnormality in a temperature change parameter of the i-th temperature measurement point; and / or, The fault diagnosis module is used to determine that at least one of the temperature sensor, copper bus, and battery cell corresponding to the j-th temperature measurement point is faulty in response to the temperature of the j-th temperature measurement point being outliers; and / or, The fault diagnosis module is used to determine that a liquid cooling unit in the energy storage system has a fault in response to an over-temperature abnormality of a battery pack in the energy storage system; wherein, N is the number of temperature measurement points in the energy storage system, and i and j are both positive integers not greater than N.

11. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 9.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 9 when executed by a processor.

13. A computer program product, characterized in that The invention comprises a computer program, which, when executed by a processor, implements the method according to any one of claims 1 to 9.

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