Energy storage capacity optimization method and device based on retired battery energy storage sharing

Abstract

The present invention relates to the technical field of energy storage capacity optimization, and is a method and device for optimizing energy storage capacity based on retired battery energy storage sharing, comprising: obtaining a retired battery set for energy storage capacity analysis, screening the retired battery set, obtaining a target retired battery set, obtaining a target identification battery group sequence using the target retired battery set and the target output power, obtaining a target storage power based on the extracted target identification battery group, calculating the collection power using a pre-constructed power loss relationship and the target storage power, obtaining the collection power using a power collection unit, obtaining a target discharge battery group based on the collection power, the collection power and the active balancing unit, obtaining the remaining capacity range of the target discharge battery group, and realizing energy storage sharing of retired batteries based on the remaining capacity range. The present invention can realize the optimization of retired battery energy storage sharing.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage capacity optimization, and in particular to an energy storage capacity optimization method, device, electronic device and computer-readable storage medium based on retired battery energy storage sharing. Background Art

[0002] With the continuous development of science and technology, the technology of sharing energy storage of renewable energy such as wind energy and solar energy and retired batteries has gradually become popular. If the energy storage sharing of retired batteries can be realized, it will reduce the pressure of environmental protection and improve the recycling rate of retired battery resources.

[0003] At present, energy storage sharing of retired batteries is mainly achieved through battery management systems.

[0004] Although the above method can realize the energy storage sharing of retired batteries, it does not consider the grouping of existing retired battery sets when sharing the energy storage of retired batteries. Therefore, the energy storage capacity of retired batteries is reduced to a certain extent and the service life of retired batteries is shortened. Therefore, how to optimize the energy storage sharing of retired batteries and increase the service life of retired batteries has become an urgent problem to be solved. Summary of the invention

[0005] The present invention provides an energy storage capacity optimization method based on retired battery energy storage sharing, the main purpose of which is to achieve optimization of retired battery energy storage sharing.

[0006] To achieve the above object, the present invention provides a method for optimizing energy storage capacity based on retired battery energy storage sharing, comprising:

[0007] Obtaining a retired battery set for energy storage capacity analysis, screening the retired battery set, and obtaining a target retired battery set;

[0008] An energy storage sharing unit is identified, wherein the energy storage sharing unit includes: a power collection unit, an optimal power unit, an energy storage mechanism, and an active balancing unit, wherein, upon receiving different power output instructions from the optimal power unit, the optimal power unit uses one or more target retired batteries in the target retired battery set to output an output power corresponding to the power output instruction;

[0009] confirming receipt of a target power output instruction from an optimal power unit, wherein the target power output instruction is parsed to obtain a target output power;

[0010] Using the target retired battery set and the target output power to obtain a target identified battery group sequence, wherein the energy storage mechanism is formed by connecting the target identified battery groups in the target identified battery group sequence in parallel;

[0011] Extract target-identified battery packs from the target-identified battery pack sequence in sequence, and perform the following operations on the extracted target-identified battery packs:

[0012] Obtaining target storage power based on the extracted target identification battery pack, and calculating the collected power using a pre-built power loss relationship and the target storage power;

[0013] The power collection unit is used to obtain the collected power, and the target discharge battery group is obtained based on the collected power, the collected power and the active balancing unit, and the remaining capacity range of the target discharge battery group is obtained, and the energy storage sharing of the retired battery is realized based on the remaining capacity range.

[0014] Optionally, screening the retired battery set to obtain a target retired battery set includes:

[0015] Extract retired batteries from the retired battery set in sequence, and perform the following operations on the extracted retired batteries:

[0016] Performing a discharge operation on the retired battery according to the extracted rated output power of the retired battery to obtain a discharged battery;

[0017] Acquire a charging curve based on the discharge battery, wherein the abscissa of the charging curve is time and the ordinate is voltage;

[0018] Based on a preset minimum time threshold, a preset step time value, and a preset maximum time threshold, n target voltage points are identified in the charging curve, and a reference data group is acquired based on the n target voltage points, wherein the reference data group includes: (n-2) reference data, wherein the reference data is composed of a vertical length and a connecting line length;

[0019] The reference data groups are aggregated to obtain a reference data set, and a target retired battery set is obtained based on the reference data set.

[0020] Optionally, acquiring a target retired battery set based on a reference data set includes:

[0021] Perform the following operations on all reference data sets in the reference data set set:

[0022] Acquire a plurality of fitting data based on the reference data set, wherein the fitting data include: an average value of the vertical length, a standard deviation of the vertical length, an average value of the connecting line length, and a standard deviation of the connecting line length;

[0023] A screening matrix is ​​constructed based on multiple fitting data and preset reference data, where the screening matrix is ​​as follows:

[0024]

[0025] in, represents the screening matrix, Respectively represent the reference data, the mean value of vertical length, the standard deviation of vertical length, the mean value of connecting line length and the standard deviation of connecting line length, Respectively represent the first fitting data, the mean value of vertical length, the standard deviation of vertical length, the mean value of connecting line length and the standard deviation of connecting line length, Respectively represent The average value of vertical length, standard deviation of vertical length, average value of connecting line length and standard deviation of connecting line length are given in the fitted data.

[0026] The screening value is calculated based on the reference data, the screening matrix and the pre-built screening relationship, where the screening relationship is as follows:

[0027]

[0028] in, Indicates the filter value. Respectively represent The average value of vertical length, standard deviation of vertical length, average value of connecting line length and standard deviation of connecting line length are given in the fitted data.

[0029] The screening value is compared with a preset screening threshold value. When the screening value is less than or equal to the screening threshold value, the retired batteries corresponding to the screening value are retained, and the retained retired batteries are aggregated to obtain a target retired battery set.

[0030] Optionally, the step of acquiring a target identified battery group sequence by using the target retired battery set and the target output power includes:

[0031] A screening relationship is constructed based on the target output power, wherein the screening relationship is as follows:

[0032]

[0033] in, represents the target output power, Indicates the target retired battery concentration Output power of target retired batteries, represents the number of target retired batteries;

[0034] Based on the screening relationship, one or more initial battery groups are identified from the target retired battery set, wherein the initial battery group includes one or more target retired batteries, and the following operations are performed on the one or more initial battery groups:

[0035] Obtain the SOH variance, battery quantity and absolute power difference of the initial battery group, wherein the absolute power difference is the absolute difference between the output power corresponding to the initial battery group and the target output power, wherein the SOH variance refers to the variance of the SOH values ​​corresponding to one or more target retired batteries in the initial battery group;

[0036] The SOH variance, the number of batteries and the absolute power difference are used to obtain a target identification battery pack sequence.

[0037] Optionally, the power loss relationship is as follows:

[0038]

[0039] in, Indicates the collection of electricity, represents the target storage power, Indicates time, represents the power loss coefficient of the wind turbine generator, represents the power loss coefficient of the solar generator, The number of wind turbines is indivual, Indicated in At the moment, The power of a wind turbine, Indicated in At the moment, The power of a solar generator, Indicates the number of solar generators indivual, Indicates the time to start charging. Indicates the time to terminate charging. Indicates the storage impairment factor.

[0040] Optionally, the acquiring the collected power by using the power collection unit includes:

[0041] The power collection unit includes wind generators and solar generators;

[0042] Obtaining wind power converters for wind turbines and solar power converters for solar generators;

[0043] After the wind turbine generator collects wind power, the wind power converter is used to convert the wind power into the first target power;

[0044] After the solar generator collects the light power, the solar power converter is used to convert the light power into the second target power, wherein the collected power is composed of the first target power and the second target power.

[0045] Optionally, the step of acquiring a target discharge battery group based on the power collection, power collection and active balancing unit includes:

[0046] Confirming receipt of a balancing instruction from an active balancing unit, and confirming a second target battery group based on the balancing instruction, wherein the second target battery group is a target identification battery group located after the extracted target identification battery group in the target identification battery group sequence;

[0047] The collected power is stored in a target identification battery group, and an active balancing operation is performed on the collected power during storage. When there is surplus collected power, the surplus collected power is stored in a second target battery group until the collected power stored in the extracted target identification battery group is the same as the collected power, thereby obtaining a target discharge battery group.

[0048] Optionally, the remaining capacity range is as follows:

[0049]

[0050] in, Table The remaining capacity at the moment, Indicates the preset minimum remaining capacity. Represent the discharge power and charging power respectively, They represent the discharge efficiency and the charge efficiency respectively, They represent the discharge time and the charge time respectively.

[0051] Optionally, the step of acquiring a target identified battery pack sequence by using the SOH variance, the number of batteries and the absolute power difference includes:

[0052] comparing the absolute power difference with a preset absolute power threshold, and if the absolute power difference is greater than the absolute power threshold, marking one or more target retired batteries in the initial battery group corresponding to the absolute power difference as updated batteries, aggregating the updated batteries to obtain an updated battery set, using the updated battery set as the target retired battery set, and returning to the step of identifying one or more initial battery groups from the target retired battery set based on the screening relationship until the target retired battery set fails to satisfy the screening relationship;

[0053] If the absolute power difference is less than or equal to the absolute power threshold, the initial battery group corresponding to the absolute power difference is identified as: the target output battery group;

[0054] The target output battery groups are aggregated to obtain a target output battery group set, and the following operations are performed on the target output battery groups in the target output battery group set:

[0055] The comprehensive evaluation value of the target output battery pack is calculated based on the pre-built comprehensive evaluation relationship, where the comprehensive evaluation relationship is as follows:

[0056]

[0057] in, Represents the comprehensive evaluation value, are all preset coefficients. Indicates the number of batteries. represents the SOH variance;

[0058] Using the comprehensive evaluation value, the target output battery group is identified and the target identified battery group is obtained.

[0059] The comprehensive evaluation values ​​corresponding to the target identified battery packs are sorted in ascending order to obtain a target identified battery pack sequence.

[0060] To achieve the above object, the present invention also provides an energy storage capacity optimization device based on retired battery energy storage sharing, comprising:

[0061] A battery screening module, used to obtain a retired battery set for energy storage capacity analysis, screen the retired battery set, and obtain a target retired battery set;

[0062] A unit construction module is used to identify an energy storage sharing unit, wherein the energy storage sharing unit includes: a power collection unit, an optimal power unit, an energy storage mechanism and an active balancing unit, wherein, upon receiving different power output instructions from the optimal power unit, the optimal power unit uses one or more target retired batteries in the target retired battery set to output an output power corresponding to the power output instruction;

[0063] A battery grouping module, configured to confirm receipt of a target power output instruction from an optimal power unit, wherein the target power output instruction is parsed to obtain a target output power;

[0064] Using the target retired battery set and the target output power to obtain a target identified battery group sequence, wherein the energy storage mechanism is formed by connecting the target identified battery groups in the target identified battery group sequence in parallel;

[0065] The instruction execution module is used to sequentially extract the target-identified battery packs from the target-identified battery pack sequence, and perform the following operations on the extracted target-identified battery packs:

[0066] Obtaining target storage power based on the extracted target identification battery pack, and calculating the collected power using a pre-built power loss relationship and the target storage power;

[0067] The power collection unit is used to obtain the collected power, and the target discharge battery group is obtained based on the collected power, the collected power and the active balancing unit, and the remaining capacity range of the target discharge battery group is obtained, and the energy storage sharing of the retired battery is realized based on the remaining capacity range.

[0068] In order to solve the above problem, the present invention further provides an electronic device, the electronic device comprising:

[0069] a memory storing at least one instruction; and

[0070] The processor executes the instructions stored in the memory to implement the above-mentioned energy storage capacity optimization method based on retired battery energy storage sharing.

[0071] In order to solve the above problems, the present invention also provides a computer-readable storage medium, in which at least one instruction is stored. The at least one instruction is executed by a processor in an electronic device to implement the above-mentioned energy storage capacity optimization method based on retired battery energy storage sharing.

[0072] The present invention solves the problem described in the background technology, obtains a retired battery set for energy storage capacity analysis, screens the retired battery set, obtains a target retired battery set, and identifies an energy storage sharing unit. The identification of the energy storage sharing unit can realize the reuse of retired batteries and maximize the utilization of resources. The target identification battery set and the target output power are used to obtain a target identification battery group sequence, wherein the energy storage mechanism is composed of target identification battery groups in the target identification battery group sequence connected in parallel. It can be seen that the embodiment of the present invention first identifies multiple target identification battery groups that can output the target output power in the target retired battery set according to the target output power, and then sorts the multiple target identification battery groups according to their performance and safety, thereby fully ensuring the safety of use when using retired batteries. The target storage power is obtained based on the extracted target identification battery group, and the power is collected by using the pre-constructed power loss relationship and the target storage power calculation. It can be seen that the embodiment of the present invention constructs a power loss relationship before charging the target identification battery group, and estimates the electric energy that can be stored before charging the target identification battery group, so as to improve the accuracy of charging the target identification battery group, thereby improving the service life of the target identification battery group. The power collection unit is used to obtain the collected power, and the target discharge battery group is obtained based on the collected power, the collected power and the active balancing unit, and the remaining capacity range of the target discharge battery group is obtained. It can be seen that the embodiment of the present invention limits the remaining capacity of the target identification battery group to avoid over-discharging of the target discharge battery group, thereby ensuring the service life of the target discharge battery group and planning wind turbines and solar generators in the collection unit. The use of wind and light, two clean and pollution-free renewable energy sources, improves energy safety and reduces pollution to the environment, and when charging the target identification battery group, the active balancing unit is used to achieve the balance of electric energy, so as to extend the service life of the target identification battery group and improve the safety of the battery. Therefore, the main purpose of the present invention is to achieve the optimization of retired battery storage sharing. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] Figure 1 A schematic flow chart of a method for optimizing energy storage capacity based on retired battery energy storage sharing provided in one embodiment of the present invention;

[0074] Figure 2 A functional module diagram of an energy storage capacity optimization device based on retired battery energy storage sharing provided by an embodiment of the present invention;

[0075] Figure 3 A schematic diagram of the structure of an electronic device for implementing the energy storage capacity optimization method based on retired battery energy storage sharing provided in one embodiment of the present invention.

[0076] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0077] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0078] The embodiment of the present application provides a method for optimizing energy storage capacity based on shared energy storage of retired batteries. The execution subject of the method for optimizing energy storage capacity based on shared energy storage of retired batteries includes but is not limited to at least one of the electronic devices such as a server and a terminal that can be configured to execute the method provided in the embodiment of the present application. In other words, the method for optimizing energy storage capacity based on shared energy storage of retired batteries can be executed by software or hardware installed on a terminal device or a server device, and the software can be a blockchain platform. The server includes but is not limited to: a single server, a server cluster, a cloud server or a cloud server cluster, etc.

[0079] Reference Figure 1 FIG. 1 is a flow chart of a method for optimizing energy storage capacity based on retired battery energy storage sharing provided by an embodiment of the present invention. In this embodiment, the method for optimizing energy storage capacity based on retired battery energy storage sharing includes:

[0080] S1. Obtain a retired battery set for energy storage capacity analysis, screen the retired battery set, and obtain a target retired battery set.

[0081] It should be explained that a retired battery set refers to a collection of one or more batteries that are no longer used for their original purpose.

[0082] Furthermore, the screening of the retired battery set to obtain the target retired battery set includes:

[0083] Extract retired batteries from the retired battery set in sequence, and perform the following operations on the extracted retired batteries:

[0084] Performing a discharge operation on the retired battery according to the extracted rated output power of the retired battery to obtain a discharged battery;

[0085] Acquire a charging curve based on the discharge battery, wherein the abscissa of the charging curve is time and the ordinate is voltage;

[0086] Based on a preset minimum time threshold, a preset step time value, and a preset maximum time threshold, n target voltage points are identified in the charging curve, and a reference data group is acquired based on the n target voltage points, wherein the reference data group includes: (n-2) reference data, wherein the reference data is composed of a vertical length and a connecting line length;

[0087] The reference data groups are aggregated to obtain a reference data set, and a target retired battery set is obtained based on the reference data set.

[0088] It should be understood that the purpose of performing a discharge operation on retired batteries is to keep the power of each retired battery in a consistent state, reduce the difference in the charging curve constructed due to the difference in voltage during charging when testing the retired batteries, and thus improve the accuracy of the obtained charging curve. For example: the performance of the first retired battery and the second retired battery is the same, but because the first retired battery and the second retired battery contain different electrical energy, the charging curves of the first retired battery and the second retired battery are greatly different.

[0089] It is understandable that the charging curve refers to the curve of the charging voltage of the discharge battery changing with time when it is charged. For example, when charging the discharge battery, the voltage during charging is monitored and recorded to obtain multiple voltage values ​​that change with time, and the charging curve is fitted with multiple voltage values ​​that change with time. Optionally, the charging curve is fitted by a polynomial method and multiple voltage values ​​that change with time, and other technologies can achieve the same effect, which will not be repeated here. For example, the minimum time threshold is 1h, the maximum time threshold is 2h, and the step time value is 15 minutes. Then, by the minimum time threshold of 1h, the maximum time threshold of 2h, and the step time value of 15 minutes, 6 target voltage points can be obtained, wherein the first target voltage point is composed of a time of 1h and its charging voltage, the second target voltage point is composed of a time of one hour and fifteen minutes and its charging voltage, ..., and the sixth target voltage point is composed of a time of 2h and its charging voltage. The sixth target voltage point is connected at intervals, where the interval connections are as follows: the first target voltage point is connected to the third target voltage point, the second target voltage point is connected to the fourth target voltage point, ..., the fourth target voltage point and the sixth target voltage point, and the distance of the resulting connection is the connection length, and a perpendicular line is drawn from the second target voltage point to the connection line between the first target voltage point and the third target voltage point, and the distance of the resulting perpendicular line is the vertical length.

[0090] For example, when Xiao Zhang needs to screen usable retired batteries, he uses the rated output power of the retired batteries to perform discharge operations on them. For example, if the rated output power is 1W, the retired batteries are released with power at 1W until the retired batteries can no longer output power at 1W, and a discharged battery is obtained.

[0091] It should be explained that the step of obtaining a target retired battery set based on a reference data set includes:

[0092] Perform the following operations on all reference data sets in the reference data set set:

[0093] Acquire a plurality of fitting data based on the reference data set, wherein the fitting data include: an average value of the vertical length, a standard deviation of the vertical length, an average value of the connecting line length, and a standard deviation of the connecting line length;

[0094] A screening matrix is ​​constructed based on multiple fitting data and preset reference data, where the screening matrix is ​​as follows:

[0095]

[0096] in, represents the screening matrix, Respectively represent the reference data, the mean value of vertical length, the standard deviation of vertical length, the mean value of connecting line length and the standard deviation of connecting line length, Respectively represent the first fitting data, the mean value of vertical length, the standard deviation of vertical length, the mean value of connecting line length and the standard deviation of connecting line length, Respectively represent The average value of vertical length, standard deviation of vertical length, average value of connecting line length and standard deviation of connecting line length are given in the fitted data.

[0097] The screening value is calculated based on the reference data, the screening matrix and the pre-built screening relationship, where the screening relationship is as follows:

[0098]

[0099] in, Indicates the filter value. Respectively represent The average value of vertical length, standard deviation of vertical length, average value of connecting line length and standard deviation of connecting line length are given in the fitted data.

[0100] The screening value is compared with a preset screening threshold value. When the screening value is less than or equal to the screening threshold value, the retired batteries corresponding to the screening value are retained, and the retained retired batteries are aggregated to obtain a target retired battery set.

[0101] For example, the fitting data corresponding to the reference retired battery are 1, 2, 3 and 4, the fitting data corresponding to the first retired battery in the screening matrix are 1, 2, 3 and 6, and the fitting data corresponding to the second retired battery in the screening matrix are 3, 4, 5 and 6. The screening matrix constructed using these three fitting data is:

[0102]

[0103] If the screening value calculated by the reference retired battery and the first retired battery is 2, the screening value calculated by the reference retired battery and the second retired battery is 4, and the preset screening threshold is 2, the first retired battery is retained.

[0104] Furthermore, when the screening value of the retired battery is greater than the screening threshold, it means that the voltage value of the retired battery corresponding to the fitting data fluctuates greatly within a certain period of time, indicating that the retired battery does not meet the safety requirements in actual use, so the retired battery is eliminated. For example: in actual use, a fire may be caused by a large fluctuation in the voltage value of the retired battery in a short period of time. If the screening value of the retired battery is less than or equal to the screening threshold, it proves that the retired battery meets the safety requirements.

[0105] S2. Identify an energy storage sharing unit, wherein the energy storage sharing unit includes: a power collection unit, an optimal power unit, an energy storage mechanism and an active balancing unit.

[0106] Importantly, the energy storage sharing unit is a unit constructed to meet different output powers and maximize resource utilization, and the energy storage sharing unit includes: a power collection unit, an optimal power unit, an energy storage mechanism and an active balancing unit. For the application of specific units, please refer to the subsequent embodiments.

[0107] S3. Upon receiving a different power output instruction from the optimal power unit, the optimal power unit uses one or more target retired batteries in the target retired battery set to output an output power corresponding to the power output instruction.

[0108] Exemplarily, if Xiao Zhao wants to use the energy storage sharing unit to generate 10W of power, the energy storage sharing unit will retrieve one or more target retired batteries from the target retired battery set, and use the one or more target retired batteries to output 10W of power. One or more target retired batteries may not be able to generate exactly 10W of power, so one or more target retired batteries can generate 10W of power by voltage division or current shunting. The same effect can be achieved by using other technologies, which will not be repeated here.

[0109] S4. Confirm receipt of a target power output instruction from an optimal power unit, wherein the target power output instruction is parsed to obtain a target output power, and a target identified battery pack sequence is obtained using the target retired battery set and the target output power, wherein the energy storage mechanism is composed of target identified battery packs in the target identified battery pack sequence connected in parallel.

[0110] It should be understood that the target output power refers to the power required to be output by the target identified battery group, and the target identified battery group sequence refers to the sequence of the target identified battery groups obtained by grouping and sorting the target retired battery sets according to performance.

[0111] Further, the step of obtaining a target identified battery group sequence by using the target retired battery set and the target output power includes:

[0112] A screening relationship is constructed based on the target output power, wherein the screening relationship is as follows:

[0113]

[0114] in, represents the target output power, Indicates the target retired battery concentration Output power of target retired batteries, represents the number of target retired batteries;

[0115] Based on the screening relationship, one or more initial battery groups are identified from the target retired battery set, wherein the initial battery group includes one or more target retired batteries, and the following operations are performed on the one or more initial battery groups:

[0116] Obtain the SOH variance, battery quantity and absolute power difference of the initial battery group, wherein the absolute power difference is the absolute difference between the output power corresponding to the initial battery group and the target output power, wherein the SOH variance refers to the variance of the SOH values ​​corresponding to one or more target retired batteries in the initial battery group;

[0117] The SOH variance, the number of batteries and the absolute power difference are used to obtain a target identification battery pack sequence.

[0118] It should be explained that the SOH value refers to the ratio of actual capacity to theoretical capacity, which can indicate the usage status of the battery. Before obtaining the target identification battery pack sequence, it should be made clear that each target identification battery pack sequence in the target identification battery pack sequence should at least be able to output power at the target output power. Therefore, the screening relationship is constructed.

[0119] Furthermore, the method of obtaining a target identified battery pack sequence by using the SOH variance, the number of batteries and the absolute power difference includes:

[0120] comparing the absolute power difference with a preset absolute power threshold, and if the absolute power difference is greater than the absolute power threshold, marking one or more target retired batteries in the initial battery group corresponding to the absolute power difference as updated batteries, aggregating the updated batteries to obtain an updated battery set, using the updated battery set as the target retired battery set, and returning to the step of identifying one or more initial battery groups from the target retired battery set based on the screening relationship until the target retired battery set fails to satisfy the screening relationship;

[0121] If the absolute power difference is less than or equal to the absolute power threshold, the initial battery group corresponding to the absolute power difference is identified as: the target output battery group;

[0122] The target output battery groups are aggregated to obtain a target output battery group set, and the following operations are performed on the target output battery groups in the target output battery group set:

[0123] The comprehensive evaluation value of the target output battery pack is calculated based on the pre-built comprehensive evaluation relationship, where the comprehensive evaluation relationship is as follows:

[0124]

[0125] in, Represents the comprehensive evaluation value, are all preset coefficients. Indicates the number of batteries. represents the SOH variance;

[0126] Using the comprehensive evaluation value, the target output battery group is identified and the target identified battery group is obtained.

[0127] The comprehensive evaluation values ​​corresponding to the target identified battery packs are sorted in ascending order to obtain a target identified battery pack sequence.

[0128] For example, when the target output power is 10W, =10w, the target retired batteries include: a first group of retired batteries and a second group of retired batteries, wherein the first group of retired batteries consists of 5 target retired batteries, the corresponding powers of these 5 target retired batteries are 3w, 1w, 2w, 4w and 4w respectively, the second group of retired batteries consists of 4 target retired batteries, the corresponding powers of these 4 target retired batteries are 2w, 3w, 2w and 5w respectively, then the power that the first group of target retired batteries can output is 14 and 12 respectively, the power that the first group of retired batteries and the second group of retired batteries can output is greater than or equal to the target output power, and these two retired battery groups can output at a power of 10w. The absolute power difference is compared with a preset absolute power threshold, wherein the preset absolute power threshold is 2, and the absolute power differences corresponding to the first group of retired batteries and the second group of retired batteries are 4 and 2 respectively, and the absolute power difference of the first group of retired batteries is greater than the absolute power threshold. Therefore, the target retired batteries in the first group of retired batteries and the target retired batteries in the second group of retired batteries are both screened for the second time to obtain a new first group of retired batteries and a new second group of retired batteries respectively, wherein the new first group of retired batteries consists of target retired batteries of 1w, 4w and 5w, and the new second group of retired batteries consists of target retired batteries of 3w, 3w and 4w. Then, different comprehensive evaluation values ​​are obtained from the comprehensive evaluation relationship, the new first group of retired batteries and the new second group of retired batteries respectively, and the new first group of retired batteries and the new second group of retired batteries are sorted by different comprehensive evaluation values, wherein the new second group of retired batteries is located before the new first group of retired batteries, and the two battery groups constitute the target identification battery group sequence.

[0129] It should be explained that the smaller the comprehensive evaluation value is, the smaller the difference between the target retired batteries in the target output battery pack is, and therefore the safety performance of the target output battery pack is better.

[0130] S5. Extract target identification battery packs from the target identification battery pack sequence in sequence, and perform the following operations on the extracted target identification battery packs: obtain target storage power based on the extracted target identification battery packs, and collect power using a pre-constructed power loss relationship and target storage power calculation.

[0131] It should be understood that the target stored power refers to the power required to be stored in the target identification battery pack. Since there is loss in the process of power storage, it is necessary to calculate the required collected power based on the target stored power, and this power is the collected power.

[0132] Furthermore, the power loss relationship is as follows:

[0133]

[0134] in, Indicates the collection of electricity, represents the target storage power, Indicates time, represents the power loss coefficient of the wind turbine generator, represents the power loss coefficient of the solar generator, The number of wind turbines is indivual, Indicated in At the moment, The power of a wind turbine, Indicated in At the moment, The power of a solar generator, Indicates the number of solar generators indivual, Indicates the time to start charging. Indicates the time to terminate charging. Indicates the storage impairment factor.

[0135] For example, suppose there are 5 wind turbines and 10 solar turbines, which can theoretically generate 4 MW and 20 MW of electricity respectively within two hours, and the power loss coefficient of the wind turbine is =0.6, the power loss coefficient of the solar generator =0.7, storage loss factor = 0.8. Using the power loss relationship, the actual power that can be used as collected power within two hours is calculated to be 13.12MW.

[0136] S6. Using the power collection unit to obtain the collected power.

[0137] Further, the obtaining of collected power by using the power collection unit includes:

[0138] The power collection unit includes wind generators and solar generators;

[0139] Obtaining wind power converters for wind turbines and solar power converters for solar generators;

[0140] After the wind turbine generator collects wind power, the wind power converter is used to convert the wind power into the first target power;

[0141] After the solar generator collects the light power, the solar power converter is used to convert the light power into the second target power, wherein the collected power is composed of the first target power and the second target power.

[0142] It should be understood that a wind turbine is a device that converts wind energy into electrical energy, and a solar generator is a device that converts solar energy into electrical energy. The wind power converter is a device that converts the electrical energy generated by a wind generator into a specified power. The solar power converter has the same effect as the wind power converter, which will not be described in detail here. Optionally, a transformer group is used as the wind power converter, and other technologies can achieve the same effect, which will not be described in detail here. Photoelectric power and wind power are the electricity generated by solar generators and wind generators, respectively.

[0143] S7. Based on the power collection, power collection and active balancing unit, a target discharge battery group is obtained, a remaining capacity range of the target discharge battery group is obtained, and energy storage sharing of retired batteries is achieved based on the remaining capacity range.

[0144] Further, the method of acquiring a target discharge battery group based on the power collection, power collection and active balancing unit includes:

[0145] Confirming receipt of a balancing instruction from an active balancing unit, and confirming a second target battery group based on the balancing instruction, wherein the second target battery group is a target identification battery group located after the extracted target identification battery group in the target identification battery group sequence;

[0146] The collected power is stored in a target identification battery group, and an active balancing operation is performed on the collected power during storage. When there is surplus collected power, the surplus collected power is stored in a second target battery group until the collected power stored in the extracted target identification battery group is the same as the collected power, thereby obtaining a target discharge battery group.

[0147] It should be explained that there may be differences when evaluating the power of the target retired batteries in the extracted target identified battery group. For example: the target retired battery cannot store the power it identifies due to aging. Therefore, when storing the collected power in the target identified battery group, it is necessary to consider the overflow of power. In order to avoid the waste of collected power, the embodiment of the present invention performs an active balancing operation on the target identified battery group, and uses the active balancing operation to adjust the power that should be stored in the target identified battery group, and clarifies that the overflowed power should be stored in the second target battery group. The active balancing operation in the embodiment of the present invention refers to: transferring the energy of the target identified battery group to the second target battery group. And the active balancing operation is a prior art and will not be repeated here.

[0148] Furthermore, the remaining capacity range is as follows:

[0149]

[0150] in, Table The remaining capacity at the moment, Indicates the preset minimum remaining capacity. Represent the discharge power and charging power respectively, They represent the discharge efficiency and the charge efficiency respectively, They represent the discharge time and the charge time respectively.

[0151] It should be explained that by constructing a remaining capacity range to clarify the remaining capacity of the target identified battery group when in use, here it is the remaining capacity, which can extend the service life of the target identified battery group and thereby improve the optimization of retired battery energy storage sharing.

[0152] The present invention solves the problem described in the background technology, obtains a retired battery set for energy storage capacity analysis, screens the retired battery set, obtains a target retired battery set, and identifies an energy storage sharing unit. The identification of the energy storage sharing unit can realize the reuse of retired batteries and maximize the utilization of resources. The target identification battery set and the target output power are used to obtain a target identification battery group sequence, wherein the energy storage mechanism is composed of target identification battery groups in the target identification battery group sequence connected in parallel. It can be seen that the embodiment of the present invention first identifies multiple target identification battery groups that can output the target output power in the target retired battery set according to the target output power, and then sorts the multiple target identification battery groups according to their performance and safety, thereby fully ensuring the safety of use when using retired batteries. The target storage power is obtained based on the extracted target identification battery group, and the power is collected by using the pre-constructed power loss relationship and the target storage power calculation. It can be seen that the embodiment of the present invention constructs a power loss relationship before charging the target identification battery group, and estimates the electric energy that can be stored before charging the target identification battery group, so as to improve the accuracy of charging the target identification battery group, thereby improving the service life of the target identification battery group. The power collection unit is used to obtain the collected power, and the target discharge battery group is obtained based on the collected power, the collected power and the active balancing unit, and the remaining capacity range of the target discharge battery group is obtained. It can be seen that the embodiment of the present invention limits the remaining capacity of the target identification battery group to avoid over-discharging of the target discharge battery group, thereby ensuring the service life of the target discharge battery group and planning wind turbines and solar generators in the collection unit. The use of wind and light, two clean and pollution-free renewable energy sources, improves energy safety and reduces pollution to the environment, and when charging the target identification battery group, the active balancing unit is used to achieve the balance of electric energy, so as to extend the service life of the target identification battery group and improve the safety of the battery. Therefore, the main purpose of the present invention is to achieve the optimization of retired battery storage sharing.

[0153] like Figure 2, is a functional module diagram of an energy storage capacity optimization device based on retired battery energy storage sharing provided by an embodiment of the present invention.

[0154] The energy storage capacity optimization device 100 based on retired battery energy storage sharing of the present invention can be installed in an electronic device. According to the functions to be implemented, the energy storage capacity optimization device 100 based on retired battery energy storage sharing can include a battery screening module 101, a unit construction module 102, a battery grouping module 103 and an instruction execution module 104. The module described in the present invention can also be referred to as a unit, which refers to a series of computer program segments that can be executed by an electronic device processor and can complete fixed functions, which are stored in the memory of the electronic device.

[0155] The battery screening module 101 is used to obtain a retired battery set for energy storage capacity analysis, screen the retired battery set, and obtain a target retired battery set;

[0156] The unit construction module 102 is used to identify the energy storage sharing unit, wherein the energy storage sharing unit includes: a power collection unit, an optimal power unit, an energy storage mechanism and an active balancing unit, wherein, upon receiving different power output instructions from the optimal power unit, the optimal power unit uses one or more target retired batteries in the target retired battery set to output an output power corresponding to the power output instruction;

[0157] The battery grouping module 103 is used to confirm receiving a target power output instruction from an optimal power unit, wherein the target power output instruction is parsed to obtain a target output power;

[0158] Using the target retired battery set and the target output power to obtain a target identified battery group sequence, wherein the energy storage mechanism is formed by connecting the target identified battery groups in the target identified battery group sequence in parallel;

[0159] The instruction execution module 104 is used to sequentially extract target-identified battery packs from the target-identified battery pack sequence, and perform the following operations on the extracted target-identified battery packs:

[0160] Obtaining target storage power based on the extracted target identification battery pack, and calculating the collected power using a pre-built power loss relationship and the target storage power;

[0161] The power collection unit is used to obtain the collected power, and the target discharge battery group is obtained based on the collected power, the collected power and the active balancing unit, and the remaining capacity range of the target discharge battery group is obtained, and the energy storage sharing of the retired battery is realized based on the remaining capacity range.

[0162] In detail, each module in the energy storage capacity optimization device 100 based on retired battery energy storage sharing in the embodiment of the present invention adopts the same method as above when in use. Figure 1 The energy storage capacity optimization method based on retired battery energy storage sharing described in the article has the same technical means and can produce the same technical effects, so they will not be repeated here.

[0163] like Figure 3 , is a schematic diagram of the structure of an electronic device for implementing a method for optimizing energy storage capacity based on retired battery energy storage sharing provided by an embodiment of the present invention.

[0164] The electronic device 1 may include a processor 10, a memory 11 and a bus 12, and may also include a computer program stored in the memory 11 and executable on the processor 10, such as a method program for optimizing energy storage capacity based on retired battery energy storage sharing.

[0165] The memory 11 includes at least one type of readable storage medium, including flash memory, mobile hard disk, multimedia card, card-type memory (e.g., SD or DX memory, etc.), magnetic memory, disk, optical disk, etc. In some embodiments, the memory 11 may be an internal storage unit of the electronic device 1, such as a mobile hard disk of the electronic device 1. In other embodiments, the memory 11 may also be an external storage device of the electronic device 1, such as a plug-in mobile hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (SecureDigital, SD) card, a flash card (Flash Card), etc. equipped on the electronic device 1. Further, the memory 11 also includes an internal storage unit of the electronic device 1 and an external storage device. The memory 11 can not only be used to store application software and various types of data installed in the electronic device 1, such as the code of the energy storage capacity optimization method program based on retired battery energy storage sharing, but also can be used to temporarily store data that has been output or is to be output.

[0166] The processor 10 may be composed of an integrated circuit in some embodiments, for example, a single packaged integrated circuit, or a plurality of packaged integrated circuits with the same or different functions, including one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and combinations of various control chips, etc. The processor 10 is the control core (Control Unit) of the electronic device, and uses various interfaces and lines to connect various components of the entire electronic device, and executes or executes programs or modules stored in the memory 11 (such as a program for optimizing energy storage capacity based on retired battery energy storage sharing, etc.), and calls data stored in the memory 11, so as to execute various functions of the electronic device 1 and process data.

[0167] The bus 12 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus 12 may be divided into an address bus, a data bus, a control bus, etc. The bus 12 is configured to realize connection and communication between the memory 11 and at least one processor 10, etc.

[0168] Figure 3 Only an electronic device with components is shown, and those skilled in the art will understand that Figure 3 The structure shown does not constitute a limitation on the electronic device 1, and may include fewer or more components than shown in the figure, or combine certain components, or arrange the components differently.

[0169] For example, although not shown, the electronic device 1 may also include a power source (such as a battery) for supplying power to various components. Preferably, the power source may be logically connected to the at least one processor 10 through a power management device, so that the power management device can realize functions such as charging management, discharging management, and power consumption management. The power source may also include one or more DC or AC power sources, recharging devices, power failure detection circuits, power converters or inverters, power status indicators, and other arbitrary components. The electronic device 1 may also include a variety of sensors, Bluetooth modules, Wi-Fi modules, etc., which will not be repeated here.

[0170] Furthermore, the electronic device 1 may also include a network interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), which is generally used to establish a communication connection between the electronic device 1 and other electronic devices.

[0171] Optionally, the electronic device 1 may further include a user interface, which may be a display, an input unit (such as a keyboard), or a standard wired interface or a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, and an OLED (Organic Light-Emitting Diode) touch device. The display may also be appropriately referred to as a display screen or a display unit, which is used to display information processed in the electronic device 1 and to display a visual user interface.

[0172] It should be understood that the embodiment is for illustration only and the scope of the patent application is not limited to this structure.

[0173] The energy storage capacity optimization method program based on retired battery energy storage sharing stored in the memory 11 of the electronic device 1 is a combination of multiple instructions. When running in the processor 10, it can achieve:

[0174] Obtaining a retired battery set for energy storage capacity analysis, screening the retired battery set, and obtaining a target retired battery set;

[0175] An energy storage sharing unit is identified, wherein the energy storage sharing unit includes: a power collection unit, an optimal power unit, an energy storage mechanism, and an active balancing unit, wherein, upon receiving different power output instructions from the optimal power unit, the optimal power unit uses one or more target retired batteries in the target retired battery set to output an output power corresponding to the power output instruction;

[0176] confirming receipt of a target power output instruction from an optimal power unit, wherein the target power output instruction is parsed to obtain a target output power;

[0177] Using the target retired battery set and the target output power to obtain a target identified battery group sequence, wherein the energy storage mechanism is formed by connecting the target identified battery groups in the target identified battery group sequence in parallel;

[0178] Extract target-identified battery packs from the target-identified battery pack sequence in sequence, and perform the following operations on the extracted target-identified battery packs:

[0179] Obtaining target storage power based on the extracted target identification battery pack, and calculating the collected power using a pre-built power loss relationship and the target storage power;

[0180] The power collection unit is used to obtain the collected power, and the target discharge battery group is obtained based on the collected power, the collected power and the active balancing unit, and the remaining capacity range of the target discharge battery group is obtained, and the energy storage sharing of the retired battery is realized based on the remaining capacity range.

[0181] Specifically, the specific implementation method of the processor 10 for the above instructions can refer to Figures 1 to 3 The description of the relevant steps in the corresponding embodiments will not be repeated here.

[0182] Furthermore, if the module / unit integrated in the electronic device 1 is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile. For example, the computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, and a read-only memory (ROM).

[0183] The present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor of an electronic device, the computer program can implement:

[0184] Obtaining a retired battery set for energy storage capacity analysis, screening the retired battery set, and obtaining a target retired battery set;

[0185] An energy storage sharing unit is identified, wherein the energy storage sharing unit includes: a power collection unit, an optimal power unit, an energy storage mechanism, and an active balancing unit, wherein, upon receiving different power output instructions from the optimal power unit, the optimal power unit uses one or more target retired batteries in the target retired battery set to output an output power corresponding to the power output instruction;

[0186] confirming receipt of a target power output instruction from an optimal power unit, wherein the target power output instruction is parsed to obtain a target output power;

[0187] Using the target retired battery set and the target output power to obtain a target identified battery group sequence, wherein the energy storage mechanism is formed by connecting the target identified battery groups in the target identified battery group sequence in parallel;

[0188] Extract target-identified battery packs from the target-identified battery pack sequence in sequence, and perform the following operations on the extracted target-identified battery packs:

[0189] Obtaining target storage power based on the extracted target identification battery pack, and calculating the collected power using a pre-built power loss relationship and the target storage power;

[0190] The power collection unit is used to obtain the collected power, and the target discharge battery group is obtained based on the collected power, the collected power and the active balancing unit, and the remaining capacity range of the target discharge battery group is obtained, and the energy storage sharing of the retired battery is realized based on the remaining capacity range.

[0191] In the several embodiments provided by the present invention, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative, and actual implementation may have other division methods.

[0192] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0193] In addition, each functional module in each embodiment of the present invention may be integrated into one processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional modules.

[0194] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0195] In addition, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in a device claim can also be implemented by one unit or device through software or hardware. The second and other words are used to indicate names, but not to indicate any particular order.

[0196] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for optimizing energy storage capacity based on retired battery energy storage sharing, characterized in that: The method comprises: Obtaining a retired battery set for energy storage capacity analysis, screening the retired battery set, and obtaining a target retired battery set; An energy storage sharing unit is identified, wherein the energy storage sharing unit includes: a power collection unit, an optimal power unit, an energy storage mechanism, and an active balancing unit, wherein, upon receiving different power output instructions from the optimal power unit, the optimal power unit uses one or more target retired batteries in the target retired battery set to output an output power corresponding to the power output instruction; confirming receipt of a target power output instruction from an optimal power unit, wherein the target power output instruction is parsed to obtain a target output power; Using the target retired battery set and the target output power to obtain a target identified battery group sequence, wherein the energy storage mechanism is formed by connecting the target identified battery groups in the target identified battery group sequence in parallel; Extract target-identified battery packs from the target-identified battery pack sequence in sequence, and perform the following operations on the extracted target-identified battery packs: Obtaining target storage power based on the extracted target identification battery pack, and calculating the collected power using a pre-built power loss relationship and the target storage power; The power collection unit is used to obtain the collected power, and the target discharge battery group is obtained based on the collected power, the collected power and the active balancing unit, and the remaining capacity range of the target discharge battery group is obtained, and the energy storage sharing of the retired battery is realized based on the remaining capacity range.

2. The energy storage capacity optimization method based on retired battery energy storage sharing according to claim 1, characterized in that: The screening of the retired battery set to obtain the target retired battery set includes: Extract retired batteries from the retired battery set in sequence, and perform the following operations on the extracted retired batteries: Performing a discharge operation on the retired battery according to the extracted rated output power of the retired battery to obtain a discharged battery; Acquire a charging curve based on the discharge battery, wherein the abscissa of the charging curve is time and the ordinate is voltage; Based on a preset minimum time threshold, a preset step time value, and a preset maximum time threshold, n target voltage points are identified in the charging curve, and a reference data group is acquired based on the n target voltage points, wherein the reference data group includes: (n-2) reference data, wherein the reference data is composed of a vertical length and a connecting line length; The reference data groups are aggregated to obtain a reference data set, and a target retired battery set is obtained based on the reference data set.

3. The energy storage capacity optimization method based on retired battery energy storage sharing according to claim 2 is characterized in that: The step of acquiring a target retired battery set based on a reference data set includes: Perform the following operations on all reference data sets in the reference data set set: Acquire a plurality of fitting data based on the reference data set, wherein the fitting data include: an average value of the vertical length, a standard deviation of the vertical length, an average value of the connecting line length, and a standard deviation of the connecting line length; A screening matrix is ​​constructed based on multiple fitting data and preset reference data, where the screening matrix is ​​as follows: in, represents the screening matrix, Respectively represent the reference data, the mean value of vertical length, the standard deviation of vertical length, the mean value of connecting line length and the standard deviation of connecting line length, Respectively represent the first fitting data, the mean value of vertical length, the standard deviation of vertical length, the mean value of connecting line length and the standard deviation of connecting line length, Respectively represent The average value of vertical length, standard deviation of vertical length, average value of connecting line length and standard deviation of connecting line length are given in the fitted data. The screening value is calculated based on the reference data, the screening matrix and the pre-built screening relationship, where the screening relationship is as follows: in, Indicates the filter value. Respectively represent The average value of vertical length, standard deviation of vertical length, average value of connecting line length and standard deviation of connecting line length are given in the fitted data. The screening value is compared with a preset screening threshold value. When the screening value is less than or equal to the screening threshold value, the retired batteries corresponding to the screening value are retained, and the retained retired batteries are aggregated to obtain a target retired battery set.

4. The energy storage capacity optimization method based on retired battery energy storage sharing according to claim 3 is characterized in that: The step of obtaining a target identified battery group sequence by using the target retired battery set and the target output power includes: A screening relationship is constructed based on the target output power, wherein the screening relationship is as follows: in, represents the target output power, Indicates the target retired battery concentration Output power of target retired batteries, represents the number of target retired batteries; Based on the screening relationship, one or more initial battery groups are identified from the target retired battery set, wherein the initial battery group includes one or more target retired batteries, and the following operations are performed on the one or more initial battery groups: Obtain the SOH variance, battery quantity and absolute power difference of the initial battery group, wherein the absolute power difference is the absolute difference between the output power corresponding to the initial battery group and the target output power, wherein the SOH variance refers to the variance of the SOH values ​​corresponding to one or more target retired batteries in the initial battery group; The SOH variance, the number of batteries and the absolute power difference are used to obtain a target identification battery pack sequence.

5. The energy storage capacity optimization method based on retired battery energy storage sharing according to claim 4 is characterized in that: The power loss relationship is as follows: in, Indicates the collection of electricity, represents the target storage power, Indicates time, represents the power loss coefficient of the wind turbine generator, represents the power loss coefficient of the solar generator, The number of wind turbines is indivual, Indicated in At the moment, The power of a wind turbine, Indicated in At the moment, The power of a solar generator, Indicates the number of solar generators indivual, Indicates the time to start charging. Indicates the time to terminate charging. Indicates the storage impairment factor.

6. The energy storage capacity optimization method based on retired battery energy storage sharing according to claim 5 is characterized in that: The method of obtaining the collected power by using the power collection unit includes: The power collection unit includes wind generators and solar generators; Obtaining wind power converters for wind turbines and solar power converters for solar generators; After the wind turbine generator collects wind power, the wind power converter is used to convert the wind power into the first target power; After the solar generator collects the light power, the solar power converter is used to convert the light power into the second target power, wherein the collected power is composed of the first target power and the second target power.

7. The energy storage capacity optimization method based on retired battery energy storage sharing according to claim 6, characterized in that: The method of acquiring a target discharge battery group based on the power collection, power collection and active balancing unit includes: Confirming receipt of a balancing instruction from an active balancing unit, and confirming a second target battery group based on the balancing instruction, wherein the second target battery group is a target identification battery group located after the extracted target identification battery group in the target identification battery group sequence; The collected power is stored in a target identification battery group, and an active balancing operation is performed on the collected power during storage. When there is surplus collected power, the surplus collected power is stored in a second target battery group until the collected power stored in the extracted target identification battery group is the same as the collected power, thereby obtaining a target discharge battery group.

8. The energy storage capacity optimization method based on retired battery energy storage sharing according to claim 7 is characterized in that: The remaining capacity range is as follows: in, Table The remaining capacity at the moment, Indicates the preset minimum remaining capacity. Represent the discharge power and charging power respectively, They represent the discharge efficiency and the charge efficiency respectively, They represent the discharge time and the charge time respectively.

9. The energy storage capacity optimization method based on retired battery energy storage sharing according to claim 8, characterized in that: The method of obtaining a target identified battery pack sequence by using the SOH variance, the number of batteries and the absolute power difference includes: comparing the absolute power difference with a preset absolute power threshold, and if the absolute power difference is greater than the absolute power threshold, marking one or more target retired batteries in the initial battery group corresponding to the absolute power difference as updated batteries, aggregating the updated batteries to obtain an updated battery set, using the updated battery set as the target retired battery set, and returning to the step of identifying one or more initial battery groups from the target retired battery set based on the screening relationship until the target retired battery set fails to satisfy the screening relationship; If the absolute power difference is less than or equal to the absolute power threshold, the initial battery group corresponding to the absolute power difference is identified as: the target output battery group; The target output battery groups are aggregated to obtain a target output battery group set, and the following operations are performed on the target output battery groups in the target output battery group set: The comprehensive evaluation value of the target output battery pack is calculated based on a pre-built comprehensive evaluation relationship, where the comprehensive evaluation relationship is as follows: in, Represents the comprehensive evaluation value, are all preset coefficients. Indicates the number of batteries. represents the SOH variance; Using the comprehensive evaluation value, the target output battery group is identified and the target identified battery group is obtained. The comprehensive evaluation values ​​corresponding to the target identified battery packs are sorted in ascending order to obtain a target identified battery pack sequence.

10. An energy storage capacity optimization device based on retired battery energy storage sharing, characterized in that: The device comprises: A battery screening module, used to obtain a retired battery set for energy storage capacity analysis, screen the retired battery set, and obtain a target retired battery set; A unit construction module is used to identify an energy storage sharing unit, wherein the energy storage sharing unit includes: a power collection unit, an optimal power unit, an energy storage mechanism and an active balancing unit, wherein, upon receiving different power output instructions from the optimal power unit, the optimal power unit uses one or more target retired batteries in the target retired battery set to output an output power corresponding to the power output instruction; A battery grouping module, configured to confirm receipt of a target power output instruction from an optimal power unit, wherein the target power output instruction is parsed to obtain a target output power; Using the target retired battery set and the target output power to obtain a target identified battery group sequence, wherein the energy storage mechanism is formed by connecting the target identified battery groups in the target identified battery group sequence in parallel; The instruction execution module is used to sequentially extract the target-identified battery packs from the target-identified battery pack sequence, and perform the following operations on the extracted target-identified battery packs: Obtaining target storage power based on the extracted target identification battery pack, and calculating the collected power using a pre-built power loss relationship and the target storage power; The power collection unit is used to obtain the collected power, and the target discharge battery group is obtained based on the collected power, the collected power and the active balancing unit, and the remaining capacity range of the target discharge battery group is obtained, and the energy storage sharing of the retired battery is realized based on the remaining capacity range.

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