Electrochemical energy storage fire extinguishing performance evaluation method

Abstract

The invention relates to the technical field of electrochemical energy storage, and discloses an electrochemical energy storage fire extinguishing performance evaluation method which comprises the following steps: acquiring a historical fire extinguishing record of an electrochemical energy storage system; dividing the historical fire extinguishing record into a historical steady-state fire extinguishing record and a historical wave-state fire extinguishing record, and calculating a historical fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on the historical steady-state fire extinguishing record and the historical wave-state fire extinguishing record; real-time system parameters of the electrochemical energy storage system in a preset duration range are collected, a real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system is calculated, and the real-time system parameters comprise the working environment temperature and the charging and discharging rate of the electrochemical energy storage system; the fire extinguishing performance evaluation coefficient of the electrochemical energy storage system is calculated according to the historical fire extinguishing performance evaluation coefficient and the real-time fire extinguishing performance evaluation coefficient, comprehensive and reliable evaluation of the fire extinguishing performance of the electrochemical energy storage system is achieved, the evaluation efficiency and the evaluation precision are improved, the safety of the electrochemical energy storage system is improved, and economic losses caused by fire disasters are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electrochemical energy storage, and more particularly, to a method for evaluating the fire extinguishing performance of an electrochemical energy storage system. Background Art

[0002] With the rapid development of global renewable energy, electrochemical energy storage systems play an increasingly important role in the transformation of the energy structure due to their high efficiency and flexibility. However, electrochemical energy storage systems, especially lithium-ion battery systems, face significant challenges in terms of safety. Due to their high energy density and complex chemical reaction characteristics, these systems pose a great threat to property loss and life safety in the event of a fire. Therefore, it is particularly important to study and develop effective methods for evaluating fire extinguishing performance.

[0003] Therefore, using data analysis techniques, especially big data and machine learning algorithms, to evaluate the fire extinguishing performance of electrochemical energy storage systems has become a forward-looking solution. Although the evaluation of the fire extinguishing performance of electrochemical energy storage systems based on data analysis has many advantages, there are also some technical defects. One of them is the problem of data quality. The accuracy of the evaluation model highly depends on the quality and integrity of the input data. If the data is incorrect, inconsistent or incomplete, it will lead to errors in the evaluation results and affect the correct evaluation of the electrochemical energy storage system. Moreover, the establishment and training of data analysis models require a large amount of computing resources and time. Complex machine learning algorithms and model training processes may require high-performance computing devices, which increases the difficulty and cost of technology implementation. Summary of the Invention

[0004] Embodiments of the present invention provide a method for evaluating the fire extinguishing performance of an electrochemical energy storage system, which can achieve accurate evaluation of the fire extinguishing performance of the electrochemical energy storage system, reduce the evaluation difficulty, significantly improve the safety of the electrochemical energy storage system, and reduce the economic losses caused by fires.

[0005] To achieve the above object, the present invention provides a method for evaluating the fire extinguishing performance of an electrochemical energy storage system, comprising:

[0006] Determine the electrochemical energy storage system to be evaluated, and obtain the historical fire extinguishing records of the electrochemical energy storage system;

[0007] Divide the historical fire extinguishing records into historical steady-state fire extinguishing records and historical wave-state fire extinguishing records, and calculate the historical fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on the historical steady-state fire extinguishing records and historical wave-state fire extinguishing records;

[0008] Collect the real-time system parameters of the electrochemical energy storage system within a preset duration, and calculate the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the real-time system parameters, where the real-time system parameters include the working environment temperature and charge-discharge rate of the electrochemical energy storage system;

[0009] Calculate the fire extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the historical fire extinguishing performance evaluation coefficient and the real-time fire extinguishing performance evaluation coefficient.

[0010] Further, when dividing the historical fire extinguishing records into historical steady-state fire extinguishing records and historical wave-state fire extinguishing records, and calculating the historical fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on the historical steady-state fire extinguishing records and historical wave-state fire extinguishing records, it includes:

[0011] Analyze the historical fire extinguishing records to determine the corresponding historical fire types, and determine the corresponding ideal fire extinguishing control time based on the historical fire types;

[0012] Determine the historical fire extinguishing control time corresponding to each historical fire extinguishing record, and analyze the historical fire extinguishing record based on the historical fire extinguishing control time and the ideal fire extinguishing control time;

[0013] When the historical fire extinguishing control time is less than the ideal fire extinguishing control time, generate a super-ideal fire extinguishing mark for the corresponding historical fire extinguishing record;

[0014] When the historical fire extinguishing control time is equal to the ideal fire extinguishing control time, divide the corresponding historical fire extinguishing record into historical steady-state fire extinguishing records;

[0015] When the historical fire extinguishing control time is greater than the ideal fire extinguishing control time, divide the corresponding historical fire extinguishing record into historical wave-state fire extinguishing records;

[0016] Analyze each historical wave-state fire extinguishing record and calculate the historical wave-state fire extinguishing factor corresponding to each historical wave-state fire extinguishing record;

[0017] Calculate the historical fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on all the historical wave-state fire extinguishing factors, the super-ideal fire extinguishing mark, and the historical steady-state fire extinguishing records.

[0018] Further, when analyzing each historical wave-state fire extinguishing record and calculating the historical wave-state fire extinguishing factor corresponding to each historical wave-state fire extinguishing record, it includes:

[0019] Extract the historical fire extinguishing control time corresponding to the historical wave-state fire extinguishing record, and calculate the fire extinguishing control time difference between the historical fire extinguishing control time and the corresponding ideal fire extinguishing control time;

[0020] Extract the historical fire extinguishing records of the same type corresponding to the historical wave - state fire extinguishing records from all the ultra - ideal fire - extinguishing marks, and determine the minimum historical fire - extinguishing control time;

[0021] Calculate the second fire - extinguishing control time difference between the historical fire - extinguishing control time and the minimum historical fire - extinguishing control time;

[0022] Calculate the historical wave - state fire - extinguishing factor corresponding to the historical wave - state fire - extinguishing record according to the fire - extinguishing control time difference and the second fire - extinguishing control time difference.

[0023] Further, when calculating the historical wave - state fire - extinguishing factor corresponding to the historical wave - state fire - extinguishing record according to the fire - extinguishing control time difference and the second fire - extinguishing control time difference, it includes:

[0024] Calculate the historical wave - state fire - extinguishing factor corresponding to the historical wave - state fire - extinguishing record according to the following formula:

[0025] q = w1×e1+w2×e2;

[0026] Where q is the historical wave - state fire - extinguishing factor corresponding to the historical wave - state fire - extinguishing record, w1 is the first calculation coefficient, e1 is the fire - extinguishing control time difference, w2 is the second calculation coefficient, e2 is the second fire - extinguishing control time difference, and w1 + w2 = 1, w1>w2.

[0027] Further, when calculating the historical fire - extinguishing performance evaluation coefficient of the electrochemical energy storage system based on all the historical wave - state fire - extinguishing factors, the ultra - ideal fire - extinguishing marks and the historical steady - state fire - extinguishing records, it includes:

[0028] Count the number of the historical steady - state fire - extinguishing records and count the number of the historical wave - state fire - extinguishing records;

[0029] Set the adjustment number of the historical fire - extinguishing performance evaluation coefficient according to the ultra - ideal fire - extinguishing marks;

[0030] Calculate the historical fire - extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the following formula:

[0031]

[0032] Where r is the historical fire - extinguishing performance evaluation coefficient of the electrochemical energy storage system, t1 is the first calculation factor, y1 is the number of the historical wave - state fire - extinguishing records, y2 is the number of the historical steady - state fire - extinguishing records, t2 is the second calculation factor, u i is the i - th historical wave - state fire - extinguishing factor, u max is the maximum historical wave - state fire - extinguishing factor, and p is the adjustment number of the historical fire - extinguishing performance evaluation coefficient.

[0033] Further, when setting the adjustment number of the historical fire extinguishing performance evaluation coefficient according to the ultra-ideal fire extinguishing mark, it includes:

[0034] Count the number of marks y3 of the ultra-ideal fire extinguishing mark;

[0035] Preset a first adjustment number, a second adjustment number, and a third adjustment number;

[0036] When y3 / (y1 + y2) < 1.2, set the first adjustment number as the adjustment number of the historical fire extinguishing performance evaluation coefficient;

[0037] When y3 / (y1 + y2) = 1.2, set the second adjustment number as the adjustment number of the historical fire extinguishing performance evaluation coefficient;

[0038] When y3 / (y1 + y2) > 1.2, set the third adjustment number as the adjustment number of the historical fire extinguishing performance evaluation coefficient.

[0039] Further, when collecting the real-time system parameters of the electrochemical energy storage system within a preset time range and calculating the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the real-time system parameters, it includes:

[0040] Divide the preset time range into multiple time node groups, and determine the first working environment temperature and the second working environment temperature of each time node group. Among them, the first working environment temperature is the working environment temperature corresponding to the end moment of each time node group, and the second working environment temperature is the difference in the working environment temperature between the start moment and the end moment of each time node group;

[0041] Determine the first fire extinguishing performance evaluation factor of the electrochemical energy storage system according to the first working environment temperature and the second working environment temperature. Among them, the first fire extinguishing performance evaluation factor is the sum of the working environment temperatures of the first working environment temperature and the second working environment temperature;

[0042] Determine the first charge-discharge rate and the second charge-discharge rate of each time node group. Among them, the first charge-discharge rate is the charge-discharge rate corresponding to the end moment of each time node group, and the second charge-discharge rate is the difference in the charge-discharge rate between the start moment and the end moment of each time node group;

[0043] Determine the second fire extinguishing performance evaluation factor of the electrochemical energy storage system according to the first charge-discharge rate and the second charge-discharge rate. Among them, the second fire extinguishing performance evaluation factor is the sum of the charge-discharge rates of the first charge-discharge rate and the second charge-discharge rate;

[0044] Calculate the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on the first fire extinguishing performance evaluation factor and the second fire extinguishing performance evaluation factor.

[0045] Further, when calculating the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on the first fire extinguishing performance evaluation factor and the second fire extinguishing performance evaluation factor, it includes:

[0046] Taking the first fire extinguishing performance evaluation factor as the abscissa and the second fire extinguishing performance evaluation factor as the ordinate, construct a fire extinguishing performance evaluation factor curve;

[0047] Based on the first fire extinguishing performance evaluation factor and the second fire extinguishing performance evaluation factor, determine the curve slope of the corresponding time node group on the fire extinguishing performance evaluation factor curve;

[0048] Calculate the mean value of the curve slopes of all curve slopes, mark the mean value of the curve slopes on the fire extinguishing performance evaluation factor curve, and divide the fire extinguishing performance evaluation factor curve into a lower fire extinguishing performance evaluation factor curve and an upper fire extinguishing performance evaluation factor curve;

[0049] Calculate the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the lower fire extinguishing performance evaluation factor curve and the upper fire extinguishing performance evaluation factor curve.

[0050] Further, when calculating the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the lower fire extinguishing performance evaluation factor curve and the upper fire extinguishing performance evaluation factor curve, it includes:

[0051] Calculate the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the following formula:

[0052]

[0053] where s is the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system, m1 is the number of curve slopes on the upper fire extinguishing performance evaluation factor curve, m2 is the number of curve slopes on the lower fire extinguishing performance evaluation factor curve, g d is the d-th curve slope on the upper fire extinguishing performance evaluation factor curve, h f is the f-th curve slope on the lower fire extinguishing performance evaluation factor curve.

[0054] Further, when calculating the fire extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the historical fire extinguishing performance evaluation coefficient and the real-time fire extinguishing performance evaluation coefficient, it includes:

[0055] Configure a first calculation weight for the historical fire extinguishing performance evaluation coefficient and a second calculation weight for the real-time fire extinguishing performance evaluation coefficient;

[0056] Calculate the fire extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the following formula:

[0057] k = c1 × r s + c2 × s r ;

[0058] Wherein, k is the fire extinguishing performance evaluation coefficient of the electrochemical energy storage system, c1 is the first calculation weight, and c2 is the second calculation weight.

[0059] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0060] The present invention discloses a method for evaluating the fire extinguishing performance of electrochemical energy storage, which obtains the historical fire extinguishing records of the electrochemical energy storage system; divides the historical fire extinguishing records into historical steady-state fire extinguishing records and historical wave-state fire extinguishing records, and calculates the historical fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on the historical steady-state fire extinguishing records and historical wave-state fire extinguishing records; collects the real-time system parameters of the electrochemical energy storage system within a preset time range, and calculates the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system. The real-time system parameters include the working environment temperature and charge-discharge rate of the electrochemical energy storage system; calculates the fire extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the historical fire extinguishing performance evaluation coefficient and the real-time fire extinguishing performance evaluation coefficient, realizes a comprehensive and reliable evaluation of the fire extinguishing performance of the electrochemical energy storage system, improves the evaluation efficiency and evaluation accuracy, enhances the safety of the electrochemical energy storage system, and reduces the economic losses caused by fires. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0062] Figure 1 Shows a schematic flow chart of a method for evaluating the fire extinguishing performance of electrochemical energy storage in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0063] The following further describes in detail the specific embodiments of the present invention with reference to the drawings and embodiments. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0064] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0065] The terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0066] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0067] The following is a description of the preferred embodiments of the present invention in conjunction with the drawings.

[0068] As Figure 1 shown, the embodiments of the present invention disclose an evaluation method for the fire extinguishing performance of electrochemical energy storage, including:

[0069] S110: Determine the electrochemical energy storage system to be evaluated and obtain the historical fire extinguishing records of the electrochemical energy storage system;

[0070] In this embodiment, the period from the discovery of a fire to the successful extinguishment of the fire is used as a historical fire extinguishing record.

[0071] S120: Divide the historical fire extinguishing records into historical steady-state fire extinguishing records and historical fluctuating fire extinguishing records, and calculate the historical fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on the historical steady-state fire extinguishing records and historical fluctuating fire extinguishing records;

[0072] In some embodiments of the present application, when dividing the historical fire extinguishing records into historical steady-state fire extinguishing records and historical fluctuating fire extinguishing records, and calculating the historical fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on the historical steady-state fire extinguishing records and historical fluctuating fire extinguishing records, it includes:

[0073] Analyze the historical fire extinguishing records to determine the corresponding historical fire types, and determine the corresponding ideal fire extinguishing control time based on the historical fire types;

[0074] Determine the historical fire extinguishing control time corresponding to each historical fire extinguishing record, and analyze the historical fire extinguishing record based on the historical fire extinguishing control time and the ideal fire extinguishing control time;

[0075] When the historical fire extinguishing control time is less than the ideal fire extinguishing control time, generate a super-ideal fire extinguishing mark for the corresponding historical fire extinguishing record;

[0076] When the historical fire extinguishing control time is equal to the ideal fire extinguishing control time, classify the corresponding historical fire extinguishing record as a historical steady-state fire extinguishing record;

[0077] When the historical fire extinguishing control time is greater than the ideal fire extinguishing control time, classify the corresponding historical fire extinguishing record as a historical fluctuating fire extinguishing record;

[0078] Analyze each historical fluctuating fire extinguishing record and calculate the historical fluctuating fire extinguishing factor corresponding to each historical fluctuating fire extinguishing record;

[0079] Calculate the historical fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on all the historical fluctuating fire extinguishing factors, the super-ideal fire extinguishing mark, and the historical steady-state fire extinguishing records.

[0080] In this embodiment, the historical fire types are divided into small fires, medium fires, large fires, etc. according to the size of the fire, and each historical fire type corresponds to a different ideal fire extinguishing control time. For example, the ideal fire extinguishing control time for a large fire is greater than that for a small fire.

[0081] In some embodiments of the present application, when analyzing each historical fluctuating fire extinguishing record and calculating the historical fluctuating fire extinguishing factor corresponding to each historical fluctuating fire extinguishing record, it includes:

[0082] Extract the historical fire extinguishing control time corresponding to the historical fluctuating fire extinguishing record, and calculate the fire extinguishing control time difference between the historical fire extinguishing control time and the corresponding ideal fire extinguishing control time;

[0083] Extract the historical fire extinguishing records of the same type corresponding to the historical fluctuating fire extinguishing record from all the super-ideal fire extinguishing marks, and determine the minimum historical fire extinguishing control time;

[0084] Calculate the second fire extinguishing control time difference between the historical fire extinguishing control time and the minimum historical fire extinguishing control time;

[0085] Calculate the historical wave - state fire - extinguishing factor corresponding to the historical wave - state fire - extinguishing record according to the fire - extinguishing control time difference and the second fire - extinguishing control time difference.

[0086] In this embodiment, the same type refers to the above - mentioned historical fire types. For example, if the historical fire type corresponding to the historical wave - state fire - extinguishing record is medium fire, extract the historical fire - extinguishing record corresponding to the super - ideal fire - extinguishing mark of medium fire, and extract the minimum historical fire - extinguishing control time.

[0087] The beneficial effects of the above - mentioned technical solution are as follows: The present invention calculates the historical wave - state fire - extinguishing factor corresponding to the historical wave - state fire - extinguishing record according to the fire - extinguishing control time difference and the second fire - extinguishing control time difference, which ensures the calculation accuracy of the historical wave - state fire - extinguishing factor. At the same time, the historical fire - extinguishing delay situation can be reflected by the historical wave - state fire - extinguishing factor.

[0088] In some embodiments of the present application, when calculating the historical wave - state fire - extinguishing factor corresponding to the historical wave - state fire - extinguishing record according to the fire - extinguishing control time difference and the second fire - extinguishing control time difference, it includes:

[0089] Calculate the historical wave - state fire - extinguishing factor corresponding to the historical wave - state fire - extinguishing record according to the following formula:

[0090] q = w1×e1+w2×e2;

[0091] Where q is the historical wave - state fire - extinguishing factor corresponding to the historical wave - state fire - extinguishing record, w1 is the first calculation coefficient, e1 is the fire - extinguishing control time difference, w2 is the second calculation coefficient, e2 is the second fire - extinguishing control time difference, and w1 + w2 = 1, w1>w2.

[0092] In some embodiments of the present application, when calculating the historical fire - extinguishing performance evaluation coefficient of the electrochemical energy storage system based on all the historical wave - state fire - extinguishing factors, the super - ideal fire - extinguishing mark, and the historical steady - state fire - extinguishing record, it includes:

[0093] Count the number of the historical steady - state fire - extinguishing records and count the number of the historical wave - state fire - extinguishing records;

[0094] Set the adjustment number of the historical fire - extinguishing performance evaluation coefficient according to the super - ideal fire - extinguishing mark;

[0095] Calculate the historical fire - extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the following formula:

[0096]

[0097] Where r is the historical fire - extinguishing performance evaluation coefficient of the electrochemical energy storage system, t1 is the first calculation factor, y1 is the number of the historical wave - state fire - extinguishing records, y2 is the number of the historical steady - state fire - extinguishing records, t2 is the second calculation factor, u iis the i-th historical wave state fire extinguishing factor, u max is the maximum historical wave state fire extinguishing factor, and p is the adjustment number of the historical fire extinguishing performance evaluation coefficient.

[0098] The beneficial effects of the above technical solution are as follows: Based on all historical wave state fire extinguishing factors, ultra-ideal fire extinguishing marks, and historical steady state fire extinguishing records, the present invention calculates the historical fire extinguishing performance evaluation coefficient of the electrochemical energy storage system. On the one hand, it ensures the calculation accuracy of the historical fire extinguishing performance evaluation coefficient, and on the other hand, it lays a foundation for the evaluation of the fire extinguishing performance of the electrochemical energy storage system and comprehensively reflects the historical fire extinguishing performance.

[0099] In some embodiments of the present application, when setting the adjustment number of the historical fire extinguishing performance evaluation coefficient according to the ultra-ideal fire extinguishing mark, it includes:

[0100] Count the number of marks y3 of the ultra-ideal fire extinguishing mark;

[0101] Preset the first adjustment number, the second adjustment number, and the third adjustment number;

[0102] When y3 / (y1 + y2) < 1.2, then set the first adjustment number as the adjustment number of the historical fire extinguishing performance evaluation coefficient;

[0103] When y3 / (y1 + y2) = 1.2, then set the second adjustment number as the adjustment number of the historical fire extinguishing performance evaluation coefficient;

[0104] When y3 / (y1 + y2) > 1.2, then set the third adjustment number as the adjustment number of the historical fire extinguishing performance evaluation coefficient.

[0105] In this embodiment, the first adjustment number is 1.15, the second adjustment number is 1.25, and the third adjustment number is 1.35. Specifically, it can also be adjusted according to the actual situation.

[0106] The beneficial effects of the above technical solution are as follows: According to different situations, the present invention selects different adjustment numbers, thereby realizing the dynamic adjustment of the historical fire extinguishing performance evaluation coefficient and ensuring the comprehensiveness and reliability of the calculation of the historical fire extinguishing performance evaluation coefficient.

[0107] S130: Collect the real-time system parameters of the electrochemical energy storage system within a preset time range, and calculate the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the real-time system parameters, where the real-time system parameters include the working environment temperature and the charge and discharge rate of the electrochemical energy storage system;

[0108] In this embodiment, the preset duration range is preferably [1 minute, 10 minutes]. The preset duration range includes multiple time node groups, such as [1 minute, 2 minutes], (2 minutes, 4 minutes], (4 minutes, 6 minutes], (6 minutes, 8 minutes], (8 minutes, 10 minutes].

[0109] In some embodiments of the present application, when collecting the real-time system parameters of the electrochemical energy storage system within the preset duration range and calculating the real-time fire extinguishing performance evaluation coefficient according to the real-time system parameters, it includes:

[0110] Divide the preset duration range into multiple time node groups, and determine the first working environment temperature and the second working environment temperature of each time node group. Among them, the first working environment temperature is the working environment temperature corresponding to the end moment of each time node group, and the second working environment temperature is the difference in the working environment temperature between the start moment and the end moment of each time node group;

[0111] Determine the first fire extinguishing performance evaluation factor of the electrochemical energy storage system according to the first working environment temperature and the second working environment temperature. Among them, the first fire extinguishing performance evaluation factor is the sum of the working environment temperatures of the first working environment temperature and the second working environment temperature;

[0112] Determine the first charge-discharge rate and the second charge-discharge rate of each time node group. Among them, the first charge-discharge rate is the charge-discharge rate corresponding to the end moment of each time node group, and the second charge-discharge rate is the difference in the charge-discharge rate between the start moment and the end moment of each time node group;

[0113] Determine the second fire extinguishing performance evaluation factor of the electrochemical energy storage system according to the first charge-discharge rate and the second charge-discharge rate. Among them, the second fire extinguishing performance evaluation factor is the sum of the charge-discharge rates of the first charge-discharge rate and the second charge-discharge rate;

[0114] Calculate the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on the first fire extinguishing performance evaluation factor and the second fire extinguishing performance evaluation factor.

[0115] The beneficial effect of the above technical solution is that the present invention determines the first fire extinguishing performance evaluation factor and the second fire extinguishing performance evaluation factor through the start moment and the end moment of the time node group, and then realizes the accurate calculation of the real-time fire extinguishing performance evaluation coefficient.

[0116] In some embodiments of the present application, when calculating the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on the first fire extinguishing performance evaluation factor and the second fire extinguishing performance evaluation factor, it includes:

[0117] Taking the first fire extinguishing performance evaluation factor as the abscissa and the second fire extinguishing performance evaluation factor as the ordinate, construct a fire extinguishing performance evaluation factor curve;

[0118] Based on the first fire extinguishing performance evaluation factor and the second fire extinguishing performance evaluation factor, determine the curve slope of the corresponding time node group on the fire extinguishing performance evaluation factor curve;

[0119] Calculate the curve slope mean value of all curve slopes, mark the curve slope mean value on the fire extinguishing performance evaluation factor curve, and divide the fire extinguishing performance evaluation factor curve into a lower fire extinguishing performance evaluation factor curve and an upper fire extinguishing performance evaluation factor curve;

[0120] Calculate the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the lower fire extinguishing performance evaluation factor curve and the upper fire extinguishing performance evaluation factor curve.

[0121] In this embodiment, if there is a curve slope equal to the slope mean value on the fire extinguishing performance evaluation factor curve, divide this curve slope into the lower fire extinguishing performance evaluation factor curve. If not, determine the lower fire extinguishing performance evaluation factor curve and the upper fire extinguishing performance evaluation factor curve based on the above method.

[0122] In this embodiment, based on the construction time sequence of the first fire extinguishing performance evaluation factor and the second fire extinguishing performance evaluation factor, determine the first construction point and the last construction point. Construct the lower fire extinguishing performance evaluation factor curve according to the first construction point and the curve slope mean value, and construct the upper fire extinguishing performance evaluation factor curve according to the last construction point and the curve slope mean value.

[0123] In some embodiments of the present application, when calculating the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the lower fire extinguishing performance evaluation factor curve and the upper fire extinguishing performance evaluation factor curve, it includes:

[0124] Calculate the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the following formula:

[0125]

[0126] where s is the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system, m1 is the number of curve slopes on the upper fire extinguishing performance evaluation factor curve, m2 is the number of curve slopes on the lower fire extinguishing performance evaluation factor curve, g d is the d-th curve slope on the upper fire extinguishing performance evaluation factor curve, and h f is the f-th curve slope on the lower fire extinguishing performance evaluation factor curve.

[0127] S140: Calculate the fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on the historical fire extinguishing performance evaluation coefficient and the real-time fire extinguishing performance evaluation coefficient.

[0128] In some embodiments of the present application, when calculating the fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on the historical fire extinguishing performance evaluation coefficient and the real-time fire extinguishing performance evaluation coefficient, it includes:

[0129] Configure a first calculation weight for the historical fire extinguishing performance evaluation coefficient and a second calculation weight for the real-time fire extinguishing performance evaluation coefficient;

[0130] Calculate the fire extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the following formula:

[0131] k = c1 × r s + c2 × s r ;

[0132] where k is the fire extinguishing performance evaluation coefficient of the electrochemical energy storage system, c1 is the first calculation weight, and c2 is the second calculation weight.

[0133] In this embodiment, the first calculation weight is 0.7 and the second calculation weight is 0.3.

[0134] The beneficial effects of the above technical solution are as follows: The present invention calculates the fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on the historical fire extinguishing performance evaluation coefficient and the real-time fire extinguishing performance evaluation coefficient, ensuring the comprehensiveness and accuracy of the evaluation of the fire extinguishing performance evaluation coefficient, improving the evaluation efficiency and accuracy, enhancing the safety of the electrochemical energy storage system, and reducing the economic losses caused by fires.

[0135] In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0136] Although the present invention has been described above with reference to embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed by the present invention can be combined with each other in any way, and the situations of these combinations are not all described in this specification only for the sake of saving space and resources.

[0137] Those of ordinary skill in the art can understand that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for evaluating the performance of electrochemical energy storage fire extinguishing, characterized in that: include: Determining an electrochemical energy storage system to be evaluated, and obtaining historical fire extinguishing records of the electrochemical energy storage system; Dividing the historical fire extinguishing records into historical steady-state fire extinguishing records and historical wave-state fire extinguishing records, and calculating a historical fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on the historical steady-state fire extinguishing records and the historical wave-state fire extinguishing records; Collecting real-time system parameters of the electrochemical energy storage system within a preset time range, and calculating the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the real-time system parameters, wherein the real-time system parameters include the working environment temperature and the charge and discharge rate of the electrochemical energy storage system; The fire extinguishing performance evaluation coefficient of the electrochemical energy storage system is calculated according to the historical fire extinguishing performance evaluation coefficient and the real-time fire extinguishing performance evaluation coefficient.

2. The electrochemical energy storage fire extinguishing performance evaluation method according to claim 1, characterized in that: When dividing the historical fire extinguishing records into historical steady-state fire extinguishing records and historical wave-state fire extinguishing records, and calculating the historical fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on the historical steady-state fire extinguishing records and the historical wave-state fire extinguishing records, it includes: Analyze the historical fire extinguishing records to determine the corresponding historical fire types, and determine the corresponding ideal fire extinguishing control time based on the historical fire types; Determine a historical fire extinguishing control time corresponding to each historical fire extinguishing record, and analyze the historical fire extinguishing record based on the historical fire extinguishing control time and the ideal fire extinguishing control time; When the historical fire extinguishing control time is less than the ideal fire extinguishing control time, a super-ideal fire extinguishing mark is generated for the corresponding historical fire extinguishing record; When the historical fire extinguishing control time is equal to the ideal fire extinguishing control time, the corresponding historical fire extinguishing record is divided into a historical steady-state fire extinguishing record; When the historical fire extinguishing control time is greater than the ideal fire extinguishing control time, the corresponding historical fire extinguishing record is divided into a historical wave-state fire extinguishing record; Analyze each historical wave-state fire extinguishing record and calculate the historical wave-state fire extinguishing factor corresponding to each historical wave-state fire extinguishing record; The historical fire extinguishing performance evaluation coefficient of the electrochemical energy storage system is calculated based on all historical wave-state fire extinguishing factors, the super-ideal fire extinguishing mark and the historical steady-state fire extinguishing records.

3. The electrochemical energy storage fire extinguishing performance evaluation method according to claim 2, characterized in that: When analyzing each historical wave fire extinguishing record and calculating the historical wave fire extinguishing factor corresponding to each historical wave fire extinguishing record, it includes: Extract the historical fire extinguishing control time corresponding to the historical wave-state fire extinguishing record, and calculate the fire extinguishing control time difference between the historical fire extinguishing control time and the corresponding ideal fire extinguishing control time; Extracting historical fire extinguishing records of the same type as those corresponding to the historical wave-state fire extinguishing records from all super-ideal fire extinguishing marks, and determining the minimum historical fire extinguishing control time; Calculating a second fire extinguishing control time difference between the historical fire extinguishing control time and the minimum historical fire extinguishing control time; The historical wave-state fire extinguishing factor corresponding to the historical wave-state fire extinguishing record is calculated according to the fire extinguishing control time difference and the second fire extinguishing control time difference.

4. The electrochemical energy storage fire extinguishing performance evaluation method according to claim 3, characterized in that: When calculating the historical wave-state fire extinguishing factor corresponding to the historical wave-state fire extinguishing record according to the fire extinguishing control time difference and the second fire extinguishing control time difference, it includes: The historical wave-state fire extinguishing factor corresponding to the historical wave-state fire extinguishing record is calculated according to the following formula: q = w1 × e1 + w2 × e2; Among them, q is the historical wave fire extinguishing factor corresponding to the historical wave fire extinguishing record, w1 is the first calculation coefficient, e1 is the fire extinguishing control time difference, w2 is the second calculation coefficient, e2 is the second fire extinguishing control time difference, and w1+w2=1, w1>w2.

5. The electrochemical energy storage fire extinguishing performance evaluation method according to claim 2, characterized in that: When calculating the historical fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on all historical wave-state fire extinguishing factors, the super-ideal fire extinguishing mark and the historical steady-state fire extinguishing record, it includes: Counting the number of the historical steady-state fire extinguishing records, and counting the number of the historical wave-state fire extinguishing records; Setting an adjustment number of a historical fire extinguishing performance evaluation coefficient according to the super-ideal fire extinguishing mark; The historical fire extinguishing performance evaluation coefficient of the electrochemical energy storage system is calculated according to the following formula: Among them, r is the historical fire extinguishing performance evaluation coefficient of the electrochemical energy storage system, t1 is the first calculation factor, y1 is the number of historical wave-state fire extinguishing records, y2 is the number of historical steady-state fire extinguishing records, t2 is the second calculation factor, and u i is the ith historical wave extinguishing factor, u max is the maximum historical wave extinguishing factor, and p is the adjustment number of the historical fire extinguishing performance evaluation coefficient.

6. The electrochemical energy storage fire extinguishing performance evaluation method according to claim 5, characterized in that: When setting the adjustment number of the historical fire extinguishing performance evaluation coefficient according to the super-ideal fire extinguishing mark, it includes: Counting the number of marks y3 of the super-ideal fire extinguishing marks; Preset a first adjustment number, a second adjustment number and a third adjustment number; When y3 / (y1+y2)<1.2, the first adjustment number is set as the adjustment number of the historical fire extinguishing performance evaluation coefficient; When y3 / (y1+y2)=1.2, the second adjustment number is set as the adjustment number of the historical fire extinguishing performance evaluation coefficient; When y3 / (y1+y2)>1.2, the third adjustment number is set as the adjustment number of the historical fire extinguishing performance evaluation coefficient.

7. The electrochemical energy storage fire extinguishing performance evaluation method according to claim 1, characterized in that: When collecting the real-time system parameters of the electrochemical energy storage system within a preset time range, and calculating the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the real-time system parameters, it includes: Divide the preset time range into multiple time node groups, and determine the first working environment temperature and the second working environment temperature of each time node group, wherein the first working environment temperature is the working environment temperature corresponding to the end time of each time power saving group, and the second working environment temperature is the working environment temperature difference between the working environment temperature corresponding to the start time and the end time of each time node group; Determine a first fire extinguishing performance evaluation factor of the electrochemical energy storage system according to the first working environment temperature and the second working environment temperature, wherein the first fire extinguishing performance evaluation factor is the working environment temperature and value of the first working environment temperature and the second working environment temperature; Determine a first charge and discharge rate and a second charge and discharge rate for each time node group, wherein the first charge and discharge rate is the charge and discharge rate corresponding to the end time of each time node group, and the second charge and discharge rate is the charge and discharge rate difference between the charge and discharge rates corresponding to the start time and the end time of each time node group; Determining a second fire extinguishing performance evaluation factor of the electrochemical energy storage system according to the first charge and discharge rate and the second charge and discharge rate, wherein the second fire extinguishing performance evaluation factor is a charge and discharge rate and a value of the first charge and discharge rate and the second charge and discharge rate; A real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system is calculated based on the first fire extinguishing performance evaluation factor and the second fire extinguishing performance evaluation factor.

8. The electrochemical energy storage fire extinguishing performance evaluation method according to claim 7, characterized in that: When calculating the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system based on the first fire extinguishing performance evaluation factor and the second fire extinguishing performance evaluation factor, it includes: Constructing a fire extinguishing performance evaluation factor curve with the first fire extinguishing performance evaluation factor as the horizontal coordinate and the second fire extinguishing performance evaluation factor as the vertical coordinate; Determine the slope of a curve of a corresponding time node group on the fire extinguishing performance evaluation factor curve based on the first fire extinguishing performance evaluation factor and the second fire extinguishing performance evaluation factor; Calculating a curve slope mean of all curve slopes, marking the curve slope mean on the fire extinguishing performance evaluation factor curve, and dividing the fire extinguishing performance evaluation factor curve into a lower fire extinguishing performance evaluation factor curve and an upper fire extinguishing performance evaluation factor curve; The real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system is calculated according to the lower fire extinguishing performance evaluation factor curve and the upper fire extinguishing performance evaluation factor curve.

9. The electrochemical energy storage fire extinguishing performance evaluation method according to claim 8, characterized in that: When calculating the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the lower fire extinguishing performance evaluation factor curve and the upper fire extinguishing performance evaluation factor curve, it includes: The real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system is calculated according to the following formula: Where s is the real-time fire extinguishing performance evaluation coefficient of the electrochemical energy storage system, m1 is the number of curve slopes on the upper fire extinguishing performance evaluation factor curve, m2 is the number of curve slopes on the lower fire extinguishing performance evaluation factor curve, and g d is the slope of the dth curve on the fire extinguishing performance evaluation factor curve, h f is the slope of the fth curve on the lower fire extinguishing performance evaluation factor curve.

10. The electrochemical energy storage fire extinguishing performance evaluation method according to claim 1, characterized in that: When calculating the fire extinguishing performance evaluation coefficient of the electrochemical energy storage system according to the historical fire extinguishing performance evaluation coefficient and the real-time fire extinguishing performance evaluation coefficient, it includes: Configuring a first calculation weight for the historical fire extinguishing performance evaluation coefficient and configuring a second calculation weight for the real-time fire extinguishing performance evaluation coefficient; The fire extinguishing performance evaluation coefficient of the electrochemical energy storage system is calculated according to the following formula: k=c1×r s +c2×s r ; Wherein, k is the fire extinguishing performance evaluation coefficient of the electrochemical energy storage system, c1 is the first calculation weight, and c2 is the second calculation weight.

Images