Cooperative control method and device for multiple energy storage units

Abstract

The invention discloses a cooperative control method and device for multiple energy storage units, an energy storage system comprises a plurality of energy storage units arranged in a matrix mode, each energy storage unit is provided with a temperature sensor, and the cooperative control method comprises the following steps: respectively obtaining real-time temperature values and charge state values of the plurality of energy storage units in a current detection period; when the real-time temperature value of the current energy storage unit is greater than or equal to a preset temperature threshold value, calculating a charging and discharging power adjustment coefficient of the current energy storage unit based on the real-time temperature values and the charge state values of all the energy storage units in combination with frequency modulation data of the energy storage system; obtaining a charging and discharging power adjustment value according to the charging and discharging power initial value of the current energy storage unit; and according to a preset power distribution rule, distributing the charging and discharging power adjustment value to a plurality of non-directly adjacent energy storage units which are not directly adjacent to the current energy storage unit, and controlling the plurality of non-directly adjacent energy storage units to correspondingly adjust the charging and discharging power according to the respective distributed charging and discharging power adjustment share.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage system control, and in particular to a coordinated control method and device for multiple energy storage units. Background Art

[0002] With the global emphasis on clean energy, the proportion of renewable energy power generation in the power system is increasing, such as solar energy, wind energy, etc. However, renewable energy power generation is greatly affected by natural conditions and has the characteristics of intermittent and fluctuating, resulting in unstable power supply. In order to ensure the stable operation and reliable power supply of the power system, energy storage technology has become a key support. By storing excess electricity and releasing it when needed, it can effectively solve the imbalance between renewable energy power generation and electricity demand.

[0003] At present, the control strategies of many energy storage systems are relatively simple, mainly based on fixed rules or single parameters for charge and discharge control, and fail to fully consider the diversity of energy storage units and the dynamic changes in the system's operating status. For example, some energy storage systems only determine the charge and discharge of energy storage units based on the frequency deviation of the power grid, while ignoring factors such as the energy storage unit's own state of charge, health status, and temperature. This may lead to excessive charge and discharge of energy storage units, affecting their service life, and also failing to give full play to the overall performance of the energy storage system.

[0004] In a system containing multiple energy storage units, there are common problems with the coordinated control of the energy storage units. Due to the differences in the characteristics of different energy storage units (such as capacity, charging and discharging efficiency, response time, etc.), existing control methods often make it difficult to achieve effective coordination between the units and reasonable power distribution. For example, during the grid frequency regulation process, some energy storage units may take on too many power regulation tasks, while other units fail to fully play their role, reducing the effect of the energy storage system on grid frequency support.

[0005] In addition, the interaction between the energy storage system and the power grid is not flexible enough, and the energy storage path and power distribution cannot be dynamically adjusted according to the different operating conditions and needs of the power grid. For example, in special circumstances such as peak and valley periods of electricity consumption and power grid failures, the energy storage system cannot quickly and adaptively change the control strategy to achieve effective support for the power grid and optimize its own performance. Summary of the invention

[0006] The purpose of the embodiment of the present invention is to provide a collaborative control method for multiple energy storage units, which realizes precise multi-factor control by comprehensively considering the real-time temperature value, charge state value and frequency modulation data of each energy storage unit, avoids the limitation of a single factor, and makes the collaboration of non-directly adjacent energy storage units more efficient and balanced based on power allocation rules, thereby improving the overall power response.

[0007] To solve the above technical problems, a first aspect of an embodiment of the present invention provides a collaborative control method for multiple energy storage units. The energy storage system includes a plurality of energy storage units arranged in a matrix, each energy storage unit is provided with a temperature sensor, and the collaborative control method includes the following steps:

[0008] Respectively obtain the real-time temperature values ​​and charge state values ​​of several energy storage units in the current detection cycle;

[0009] When the real-time temperature value of the current energy storage unit is greater than or equal to the preset temperature threshold, the charge and discharge power adjustment coefficient of the current energy storage unit is calculated based on the real-time temperature values ​​and charge state values ​​of all energy storage units and the frequency modulation data of the energy storage system, and the charge and discharge power adjustment value is obtained according to the initial charge and discharge power value of the current energy storage unit;

[0010] According to the preset power allocation rule, the charge and discharge power adjustment value is allocated to several indirect adjacent energy storage units that are not directly adjacent to the current energy storage unit, and the several indirect adjacent energy storage units are controlled to adjust the charge and discharge power accordingly according to their respective allocated charge and discharge power adjustment shares.

[0011] Furthermore, the frequency regulation data includes: the control coefficient and time constant of the energy storage system participating in the primary frequency regulation and the comprehensive frequency regulation coefficient of the power system;

[0012] The charge and discharge power adjustment value is the charge and discharge power initial value multiplied by the charge and discharge power adjustment coefficient. The charge and discharge power initial value is the initial power allocation value when the current energy storage unit is charged and discharged.

[0013] The calculation formula of the current energy storage unit's charge and discharge power regulation coefficient is calculated by formula 1:

[0014]

[0015] Among them, K i is the current charging and discharging power regulation coefficient of the energy storage unit, T i is the real-time temperature value of the current energy storage unit, T ref is the standard operating temperature of the energy storage unit, T adj,j is the real-time temperature value of the jth adjacent energy storage unit, ω j is the weight coefficient of the real-time temperature value of the jth adjacent energy storage unit, n is the number of adjacent energy storage units, SOC i is the current state of charge of the energy storage unit, SOC avg is the average value of all adjacent energy storage units, SOC max and SOC min are the maximum and minimum state of charge of the current energy storage unit, respectively, c is the current charging efficiency of the energy storage unit, η dis the current charging efficiency of the energy storage unit, η c,avg is the average charging efficiency of all adjacent energy storage units, η d,avg is the average discharge efficiency of all adjacent energy storage units, K G and T G are the control coefficient and time constant of the energy storage system participating in primary frequency regulation, K sys is the comprehensive frequency regulation coefficient of the power system, s is the complex frequency variable in Laplace transform, λ1, λ2, λ3 are the coefficient values ​​related to the state of charge, charging and discharging efficiency and system frequency regulation respectively.

[0016] Furthermore, according to a preset power allocation rule, the charge and discharge power adjustment value is allocated to a plurality of indirect adjacent energy storage units that are not directly adjacent to the current energy storage unit, including:

[0017] Obtaining state parameters and performance parameters of several non-directly adjacent energy storage units. The state parameters include: state of charge, health state, current ratio and battery internal resistance. The performance parameters include: charge and discharge efficiency, discharge depth, cycle life and power capacity.

[0018] Based on the state parameters and performance parameters of each non-directly adjacent energy storage unit, the proportional values ​​of the charge and discharge power adjustment values ​​correspondingly allocated to the non-directly adjacent energy storage units are calculated.

[0019] Furthermore, the calculation formula of the ratio of the charging and discharging power adjustment values ​​correspondingly allocated to the non-directly adjacent energy storage units is calculated by Formula 2:

[0020]

[0021] Among them, R k is the ratio of the charge and discharge power adjustment value allocated to the kth non-directly adjacent energy storage unit, ω SOC is the state of charge weight value, SOC k is the state of charge of the kth non-directly adjacent energy storage unit, SOC avg is the average state of charge of all non-directly adjacent energy storage units, SOC max SOC is the maximum state of charge of all non-directly adjacent energy storage units. min is the minimum state of charge among all non-directly adjacent energy storage units, ω SOH is the health status weight value, SOH k is the health status of the kth non-directly adjacent energy storage unit, SOH avg SOH is the average health status of all non-directly adjacent energy storage units. max SOH is the maximum state of charge of all non-directly adjacent energy storage units. min is the minimum state of charge among all non-directly adjacent energy storage units, ωDOD is the discharge depth weight value, DOD k is the discharge depth of the kth non-directly adjacent energy storage unit, DOD max is the maximum discharge depth of all non-directly adjacent energy storage units, ω Eff is the charge and discharge efficiency weight value, η k is the charge and discharge efficiency of the kth non-directly adjacent energy storage unit, η max is the maximum charge and discharge efficiency of all non-directly adjacent energy storage units, η min is the minimum charge and discharge efficiency of all non-directly adjacent energy storage units, ω Cycle is the cycle life weight value, Cycle life,k is the cycle life of the kth non-directly adjacent energy storage unit, Cycle max Cycle is the maximum cycle life of all non-directly adjacent energy storage units. min is the minimum cycle life of all non-directly adjacent energy storage units, ω Currnet is the current proportional weight value, i k is the current ratio of the kth non-directly adjacent energy storage unit, i j is the current ratio of the jth non-directly adjacent energy storage unit, n is the number of all non-directly adjacent energy storage units, ω Resistance is the weight value of the battery internal resistance, r k is the battery internal resistance of the kth non-directly adjacent energy storage unit, ω Power is the power capacity weight value, k k is the global power ratio allocated to the kth non-directly adjacent energy storage unit, p∑ is the output power of all non-directly adjacent energy storage units, p k,max is the maximum output power of the kth non-directly adjacent energy storage unit.

[0022] Furthermore, after controlling a plurality of non-directly adjacent energy storage units to adjust the charge and discharge power accordingly according to the charge and discharge power adjustment shares allocated to them, the method further includes:

[0023] After a first preset adjustment cycle, obtaining a real-time temperature value of the current energy storage unit;

[0024] If the current real-time temperature value of the energy storage unit is still greater than or equal to the preset temperature threshold, the charge and discharge power adjustment coefficient is calculated again and the power adjustment value is allocated.

[0025] Furthermore, after controlling a plurality of non-directly adjacent energy storage units to adjust the charge and discharge power accordingly according to the charge and discharge power adjustment shares allocated to them, the method further includes:

[0026] After the second preset adjustment period, obtaining real-time temperature values ​​of all non-directly adjacent energy storage units that have undergone power adjustment;

[0027] If the real-time temperature value of a non-directly adjacent energy storage unit is also greater than or equal to the preset temperature threshold, its charge and discharge power adjustment coefficient is calculated and the power adjustment value is allocated.

[0028] Furthermore, the time length of the second preset adjustment period is greater than the time length of the current detection period.

[0029] Furthermore, after controlling a plurality of non-directly adjacent energy storage units to adjust the charge and discharge power accordingly according to the charge and discharge power adjustment shares allocated to them, the method further includes:

[0030] Real-time detection of the real-time temperature and state of charge of all energy storage units;

[0031] If the real-time temperature value and / or state of charge value of an energy storage unit changes abnormally, the energy storage unit is judged to be in a fault state and is disconnected.

[0032] Accordingly, a second aspect of an embodiment of the present invention provides a coordinated control device for multiple energy storage units, wherein the energy storage system includes a plurality of energy storage units arranged in a matrix, each energy storage unit is provided with a temperature sensor, and the coordinated control device includes:

[0033] A data acquisition module, which is used to obtain the real-time temperature values ​​and charge state values ​​of several energy storage units in the current detection cycle;

[0034] A data calculation module, which is used to calculate the charge and discharge power adjustment coefficient of the current energy storage unit based on the real-time temperature value and the state of charge value of all energy storage units and the frequency modulation data of the energy storage system when the real-time temperature value of the current energy storage unit is greater than or equal to the preset temperature threshold, and obtain the charge and discharge power adjustment value according to the initial value of the charge and discharge power of the current energy storage unit;

[0035] The power allocation module is used to allocate the charge and discharge power adjustment value to several indirect adjacent energy storage units that are not directly adjacent to the current energy storage unit according to the preset power allocation rules, and control the several indirect adjacent energy storage units to adjust the charge and discharge power accordingly according to their respective allocated charge and discharge power adjustment shares.

[0036] Accordingly, a third aspect of an embodiment of the present invention provides an electronic device, comprising: at least one processor; and a memory connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor executes the above-mentioned collaborative control method of multiple energy storage units.

[0037] Accordingly, a fourth aspect of an embodiment of the present invention provides a computer-readable storage medium having computer instructions stored thereon, which, when executed by a processor, implement the above-mentioned coordinated control method of multiple energy storage units.

[0038] The above technical solution of the embodiment of the present invention has the following beneficial technical effects:

[0039] 1. By comprehensively considering the temperature, state of charge and system frequency modulation data of the energy storage unit, the charging and discharging power adjustment coefficient and allocation ratio are determined, and refined power adjustment is performed according to the real-time status of each energy storage unit to avoid performance degradation or safety hazards caused by unreasonable charging and discharging of the energy storage unit, effectively improve the overall operating efficiency and stability of the energy storage system, and ensure that while meeting the system frequency modulation requirements, the energy storage unit is protected to the greatest extent and its service life is extended;

[0040] 2. The power adjustment value is allocated based on multiple state parameters and performance parameters of non-directly adjacent energy storage units, which fully taps the synergy potential between energy storage units in the matrix arrangement and realizes the flexible allocation of power between energy storage units with different characteristics, so that the energy storage system can better adapt to complex and changeable working conditions. Whether it is responding to instantaneous frequency modulation instructions or long-term energy storage and release tasks, each energy storage unit can perform its duties and cooperate with each other, reducing the occurrence of situations where the overall performance of the system is affected by overload or inefficiency of local units;

[0041] 3. During and after the power adjustment process, the temperature and charge status of the energy storage unit are continuously monitored, so that potential fault risks, such as abnormal jumps, can be discovered in time, and judgments and processing can be made quickly, that is, the faulty unit is disconnected. For energy storage units with temperatures exceeding the threshold or non-adjacent units affected by power adjustment, the adjustment coefficient and power allocation can be recalculated to form a closed-loop control, which not only reduces the probability of fault occurrence, but also can effectively isolate the fault point when a fault occurs, ensuring the normal operation of the rest of the energy storage system, and significantly enhancing the reliability and fault tolerance of the entire energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate one or more embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0043] Figure 1 is a flow chart of a collaborative control method for multiple energy storage units provided by an embodiment of the present invention;

[0044] Figure 2It is a block diagram of a module of a collaborative control device for multiple energy storage units provided in an embodiment of the present invention.

[0045] Reference numerals:

[0046] 1. Data acquisition module, 2. Data calculation module, 3. Power allocation module. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0048] Method Embodiment

[0049] Please refer to Figure 1 A first aspect of an embodiment of the present invention provides a collaborative control method for multiple energy storage units, wherein the energy storage system includes a plurality of energy storage units arranged in a matrix, each energy storage unit is provided with a temperature sensor, and the collaborative control method includes the following steps:

[0050] Step S100, respectively obtaining real-time temperature values ​​and state of charge values ​​of a plurality of energy storage units in a current detection cycle.

[0051] In order to achieve accurate control and management of the energy storage system, it is necessary to establish a complete monitoring network. High-precision temperature sensors and state-of-charge monitoring devices are installed inside each energy storage unit or in its key parts. These sensors and monitoring devices can measure the temperature and state of charge of the energy storage unit at a certain time interval (for example, every second), and transmit the measured data to the control end of the energy storage system through wired (such as CAN bus, RS-485 bus, etc.) or wireless (such as ZigBee, Bluetooth, etc.) communication methods. The control end of the energy storage system collects, organizes and stores the data from each energy storage unit to form a complete data set for subsequent analysis and processing. For example, in a large-scale energy storage system consisting of 100 energy storage units, the control end of the energy storage system can accurately receive the temperature value (accurate to ±0.1℃) and state-of-charge value (accurate to ±1%) of each of the 100 units in each detection cycle (assuming 1 minute), providing the most basic information guarantee for the stable operation of the entire energy storage system.

[0052] Step S200, when the real-time temperature value of the current energy storage unit is greater than or equal to the preset temperature threshold, the charge and discharge power adjustment coefficient of the current energy storage unit is calculated based on the real-time temperature values ​​and charge state values ​​of all energy storage units and the frequency modulation data of the energy storage system, and the charge and discharge power adjustment value is obtained according to the initial charge and discharge power value of the current energy storage unit.

[0053] When the temperature of a certain energy storage unit is too high (reaching or exceeding the preset temperature threshold, which is set according to the material properties, safety standards and long-term operation experience of the energy storage unit, such as for lithium battery energy storage units, it may be set to 45°C), it is necessary to adjust its charging and discharging power to avoid safety accidents caused by overheating or irreversible damage to the energy storage unit. At this time, the control end of the energy storage system will call the real-time temperature value and state of charge value data of all energy storage units. At the same time, the state of charge also plays a key role. It is necessary to analyze the difference between the state of charge of the current unit and the average state of charge of all units, as well as its position within the maximum and minimum range of the state of charge. In addition, the frequency regulation data of the energy storage system is also taken into consideration, because the energy storage unit needs to adjust the power according to the change of the system frequency during the frequency regulation of the power grid. For example, if the frequency of the power system drops, the energy storage unit needs to discharge to support the frequency; if the frequency rises, it needs to be charged to balance. After comprehensively considering these factors, the charging and discharging power adjustment coefficient of the current energy storage unit can be calculated. Then, based on the initial value of the charging and discharging power of the unit, the basic power value is multiplied by the adjustment coefficient to obtain the charging and discharging power adjustment value, which clarifies the specific amplitude and direction of the power adjustment of the current energy storage unit.

[0054] Step S300, according to a preset power allocation rule, the charge and discharge power adjustment value is allocated to a plurality of indirectly adjacent energy storage units that are not directly adjacent to the current energy storage unit, and the plurality of indirectly adjacent energy storage units are controlled to adjust the charge and discharge power accordingly according to the charge and discharge power adjustment shares allocated to them.

[0055] In an energy storage system, an adjacent energy storage unit refers to a unit that is directly connected to the current energy storage unit in physical position. If the energy storage unit is regarded as an element in a matrix, then the adjacent energy storage unit is the unit that is next to it in the up, down, left, and right directions. For example, in a two-dimensional matrix-arranged energy storage system, for the current energy storage unit at coordinates (m, n), its adjacent energy storage units may be energy storage units located at (m-1, n), (m+1, n), (m, n-1) and (m, n+1). This close physical connection means that there may be a strong thermal conduction and electrical coupling relationship between them. From the perspective of thermal conduction, the temperature change of the adjacent energy storage unit will have a direct impact on the current energy storage unit. If the temperature of the adjacent unit is higher, the heat may be conducted to the current unit, and vice versa.

[0056] Non-directly adjacent energy storage units refer to units that are not physically adjacent to the current energy storage unit. They are separated from the current energy storage unit by at least one other energy storage unit. Taking the matrix as an example, for the current energy storage unit located at (m,n), the non-directly adjacent units may be units located at (m-2,n), (m+2,n), (m,n-2), (m,n+2) or farther. This positional relationship makes the thermal conduction and electrical coupling between them and the current unit relatively weak. When adjusting the power, when the current energy storage unit needs to adjust the power due to excessive temperature, the power adjustment value will be allocated to these non-directly adjacent energy storage units. This is because selecting non-directly adjacent units can avoid concentrating too many power adjustment tasks in the local area (around the current unit and its adjacent units), preventing problems such as local overheating or deterioration of electrical performance.

[0057] After determining the power adjustment value of the current energy storage unit with too high temperature, it is necessary to reasonably allocate this adjustment task to other energy storage units to maintain the power balance and stable operation of the entire energy storage system. The selection of several indirect adjacent energy storage units that are not directly adjacent to the current energy storage unit is based on various considerations, such as avoiding local heat concentration and optimizing power flow distribution. First, the control end of the energy storage system will obtain a series of state parameters and performance parameters of these indirect adjacent energy storage units; specifically, the state parameters include state of charge (understanding their remaining power to avoid overcharging and discharging), health status (such as battery aging, internal resistance changes, etc., give priority to using units with better health status), current ratio (reflecting the current unit in the current distribution of the entire system) and battery internal resistance (internal resistance size affects power loss and charging and discharging efficiency). Performance parameters cover charging and discharging efficiency (different units have different charging and discharging efficiencies at different states of charge and temperatures), discharge depth (preventing some units from over-discharging), cycle life (considering the service life of the unit and protecting old units) and power capacity (determining the power range that can be borne according to the rated power of the unit, etc.).

[0058] Based on these parameters, the proportion of the charge and discharge power adjustment value allocated to each non-directly adjacent energy storage unit is calculated. For example, a non-directly adjacent energy storage unit with a good state of charge, a good health state, a high charge and discharge efficiency, and a strong power capacity may be allocated a relatively large power adjustment share. Then, the total charge and discharge power adjustment value is allocated to each non-directly adjacent energy storage unit according to these proportions. After receiving the control end instruction of the energy storage system, these non-directly adjacent energy storage units assigned to the task will adjust the charge and discharge power through their own power conversion devices (such as bidirectional DC-DC converters or bidirectional AC-DC converters), and increase or decrease the charge or discharge power according to the allocated share, thereby ensuring that the entire energy storage system can still operate stably when a temperature abnormality occurs in an energy storage unit, and optimize the overall performance of the system and the service life of the energy storage unit as much as possible.

[0059] Furthermore, the frequency regulation data includes: the control coefficient and time constant of the energy storage system participating in the primary frequency regulation and the comprehensive frequency regulation coefficient of the power system; the charge and discharge power regulation value is the charge and discharge power initial value multiplied by the charge and discharge power regulation coefficient, and the charge and discharge power initial value is the initial power allocation value when the current energy storage unit is charging and discharging.

[0060] The calculation formula of the current charging and discharging power regulation coefficient of the energy storage unit is:

[0061]

[0062] Among them, K i is the current charging and discharging power regulation coefficient of the energy storage unit, T i is the real-time temperature value of the current energy storage unit, T ref is the standard operating temperature of the energy storage unit, T adj,j is the real-time temperature value of the jth adjacent energy storage unit, ω j is the weight coefficient of the real-time temperature value of the jth adjacent energy storage unit, n is the number of adjacent energy storage units, SOC i is the current state of charge of the energy storage unit, SOC avg is the average value of all adjacent energy storage units, SOC max and SOC min are the maximum and minimum state of charge of the current energy storage unit, respectively, c is the current charging efficiency of the energy storage unit, η d is the current charging efficiency of the energy storage unit, η c,avg is the average charging efficiency of all adjacent energy storage units, η d,avg is the average discharge efficiency of all adjacent energy storage units, K G and T G are the control coefficient and time constant of the energy storage system participating in primary frequency regulation, K sysis the comprehensive frequency regulation coefficient of the power system, s is the complex frequency variable in Laplace transform, λ1, λ2, λ3 are the coefficient values ​​related to the state of charge, charging and discharging efficiency and system frequency regulation respectively.

[0063] The difference between the current real-time temperature value of the energy storage unit and the standard operating temperature T i -T adj,j , this item intuitively reflects the degree to which the current energy storage unit deviates from the standard operating temperature. The greater the temperature deviation, the more significant the impact on the power regulation coefficient may be. For example, if the current unit temperature is much higher than the standard temperature, it may mean that the charging power needs to be reduced or the discharge power needs to be increased to reduce the temperature, so this item plays a preliminary role in measuring the impact of temperature in the entire formula. By weighted summing the difference between the temperature of adjacent units and the temperature of the current unit, the relative temperature state of the current unit in the local environment can be comprehensively judged. If the temperatures of the surrounding adjacent units are low, and the temperature of the current unit is high, then this part of the calculation results will tend to prompt the current unit to make more heat dissipation-related power adjustments, such as increasing the discharge power. The weight coefficient can be determined based on factors such as the tightness of the electrical connection between the adjacent unit and the current unit, and the heat conduction path.

[0064] If the state of charge of the current cell is higher than the average state of charge of the adjacent cells, SOC-SOC avg This item may prompt it to reduce charging power or increase discharging power to balance the power distribution in the entire local area and avoid overcharging or discharging of certain units, which is beneficial to extend the overall service life of the energy storage unit and maintain the stability of the system.

[0065] In the above calculation formula of charge and discharge power regulation coefficient If the charging efficiency of the current unit is lower than the average level of the adjacent units, then the charging power may need to be appropriately reduced during the charging process to reduce energy loss and avoid negative impact on the overall efficiency of the system. Similarly, there are similar considerations for discharge efficiency. Through this item, the energy storage unit can work in a higher efficiency range as much as possible during the charging and discharging process.

[0066] and The first item is to enable the energy storage unit to adjust the power according to the frequency changes of the power system. When the frequency of the power system decreases, the energy storage unit should increase the discharge power to support the frequency; when the frequency rises, the charging power should be increased to balance the frequency.

[0067] Specifically, in step S300, the charge and discharge power adjustment value is allocated to a plurality of indirect adjacent energy storage units that are not directly adjacent to the current energy storage unit according to the preset power allocation rule, including:

[0068] Step S310, obtaining state parameters and performance parameters of several non-directly adjacent energy storage units, the state parameters include: state of charge, health state, current ratio and battery internal resistance, and the performance parameters include: charge and discharge efficiency, discharge depth, cycle life and power capability.

[0069] For obtaining the state of charge (SOC), by accurately measuring the ratio of the remaining power to the rated power in each non-directly adjacent energy storage unit, this data can reflect the current power reserve of the energy storage unit. For example, when the SOC is close to 100%, the unit may not be suitable for continued large-scale charging, and discharge or maintaining the status quo should be prioritized; when the SOC is low, it may be necessary to appropriately control the discharge power to reserve sufficient power to meet subsequent needs.

[0070] The assessment of the state of health (SOH) usually integrates many factors, including the changing trend of the battery's internal resistance and the degree of capacity attenuation. Through long-term data monitoring and analysis models, the health status of each non-directly adjacent energy storage unit is determined. For example, expressed as a percentage, the SOH of a brand new energy storage unit is 100%. As the usage time increases and the number of charge and discharge cycles increases, if it is found that its capacity has dropped by 20% compared to the initial value and the internal resistance has increased by 30%, its SOH may be assessed to be around 80%. Units in poor health need to be treated with caution when allocating power to avoid further damage caused by excessive use.

[0071] The current ratio reflects the relationship between the current share of each non-directly adjacent energy storage unit and the total current during the operation of the current system. By setting a high-precision current sensor in the circuit, the current value of each unit is monitored in real time, and its ratio to the total current of the system is calculated. For example, in a system with a total current of 100A, if the current of a non-directly adjacent energy storage unit is 20A, its current ratio is 20%.

[0072] Battery internal resistance is a key characteristic parameter of energy storage units, which affects power loss and heat generation during charging and discharging. Obtain the internal resistance value of each non-directly adjacent energy storage unit. For example, for lithium batteries, the internal resistance may be between a few milliohms and tens of milliohms. Units with larger internal resistance will generate more heat during charging and discharging. Therefore, it is necessary to consider their heat dissipation capacity and the impact on system efficiency when allocating power.

[0073] The charging and discharging efficiency varies according to different energy storage technologies and individual differences of units under different charge states, temperatures and other conditions. Through experimental testing and accumulation of actual operation data, a charging and discharging efficiency curve model for each non-directly adjacent energy storage unit is established. For example, at a certain charge state and temperature, the charging efficiency of a non-directly adjacent energy storage unit is 90% and the discharging efficiency is 92%. Based on the above data, when allocating power, it is possible to give priority to units with higher efficiency for charging and discharging operations, thereby improving the energy utilization efficiency of the entire system.

[0074] Depth of discharge (DOD) refers to the ratio of the amount of electricity discharged by the energy storage unit during the discharge process to the rated capacity. It is calculated by monitoring the discharge amount of each non-directly adjacent energy storage unit and comparing it with the rated capacity. For example, if a storage unit with a rated capacity of 100Ah has discharged 30Ah of electricity, its DOD is 30%. In order to extend the service life of the energy storage unit, its depth of discharge needs to be controlled within a certain range to avoid excessive discharge. The DOD of each unit should be considered when allocating power.

[0075] Cycle life is an important indicator to measure the durability of energy storage units. It indicates the number of complete charge and discharge cycles that an energy storage unit can go through under certain charge and discharge conditions. According to the type, manufacturing process and usage history of the energy storage unit, determine the remaining number or proportion of the cycle life of each non-directly adjacent energy storage unit. For example, if an energy storage unit with a designed cycle life of 1,000 times has gone through 300 cycles, its remaining cycle life ratio is 70%. When allocating power, for units with less remaining cycle life, their working intensity should be appropriately reduced to make full use of their remaining life.

[0076] The power capacity depends on the hardware design and current operating status of the energy storage unit, including the maximum charging power and discharging power it can withstand. By analyzing the performance of the power modules and battery packs of the energy storage unit, the power capacity value of each non-directly adjacent energy storage unit at the current moment is determined. For example, the maximum charging power of a unit is 5kW and the maximum discharging power is 8kW. The above parameters limit the power adjustment range that the unit can bear during the power allocation process.

[0077] Step S320, based on the state parameter and performance parameter of each non-directly adjacent energy storage unit, calculate the ratio of the charge and discharge power adjustment value correspondingly allocated to the non-directly adjacent energy storage unit.

[0078] Specifically, among the weight coefficients corresponding to the above parameters, for the state of charge weight value, when the state of charge of a non-directly adjacent energy storage unit is close to the average state of charge of all non-directly adjacent energy storage units, its score on this item is relatively high. The calculation of the health state weight value is similar, and non-directly adjacent energy storage units with better health status (such as SOH close to 100%) will obtain higher weights. The discharge depth weight value takes into account the avoidance of over-discharge, and the unit with lower discharge depth has a higher weight. The charge and discharge efficiency weight value gives priority to units with high charge and discharge efficiency. If the charge and discharge efficiency of a non-directly adjacent energy storage unit is close to the maximum charge and discharge efficiency of all non-directly adjacent energy storage units, its weight is large. The cycle life weight value focuses on protecting units with less remaining cycle life, and the unit with longer cycle life has a higher weight. The current ratio weight value takes into account the balanced distribution of system current. If the current ratio of a non-directly adjacent energy storage unit is relatively low compared with other units, it means that it still has a certain current carrying potential, and its weight value is large. The battery internal resistance weight value is because units with large internal resistance will have more power loss and heat problems during charging and discharging, and units with smaller internal resistance have higher weights. The power capacity weight value is determined according to the proportional relationship between the power capacity of each non-directly adjacent energy storage unit and the output power of all non-directly adjacent energy storage units.

[0079] In one embodiment of the present invention, the calculation formula for the ratio of the charging and discharging power adjustment values ​​correspondingly allocated to the non-directly adjacent energy storage units is:

[0080]

[0081] Among them, R k is the ratio of the charge and discharge power adjustment value allocated to the kth non-directly adjacent energy storage unit, ω SOC is the state of charge weight value, SOC k is the state of charge of the kth non-directly adjacent energy storage unit, SOC avg is the average state of charge of all non-directly adjacent energy storage units, SOC max SOC is the maximum state of charge of all non-directly adjacent energy storage units. min is the minimum state of charge among all non-directly adjacent energy storage units, ω SOH is the health status weight value, SOH k is the health status of the kth non-directly adjacent energy storage unit, SOH avg SOH is the average health status of all non-directly adjacent energy storage units. max SOH is the maximum state of charge of all non-directly adjacent energy storage units. min is the minimum state of charge among all non-directly adjacent energy storage units, ω DOD is the discharge depth weight value, DODk is the discharge depth of the kth non-directly adjacent energy storage unit, DOD max is the maximum discharge depth of all non-directly adjacent energy storage units, ω Eff is the charge and discharge efficiency weight value, η k is the charge and discharge efficiency of the kth non-directly adjacent energy storage unit, η max is the maximum charge and discharge efficiency of all non-directly adjacent energy storage units, η min is the minimum charge and discharge efficiency of all non-directly adjacent energy storage units, ω Cycle is the cycle life weight value, Cycle life,k is the cycle life of the kth non-directly adjacent energy storage unit, Cycle max Cycle is the maximum cycle life of all non-directly adjacent energy storage units. min is the minimum cycle life of all non-directly adjacent energy storage units, ω Currnet is the current proportional weight value, i k is the current ratio of the kth non-directly adjacent energy storage unit, i j is the current ratio of the jth non-directly adjacent energy storage unit, n is the number of all non-directly adjacent energy storage units, ω Resistance is the weight value of the battery internal resistance, r k is the battery internal resistance of the kth non-directly adjacent energy storage unit, ω Power is the power capacity weight value, k k is the global power ratio allocated to the kth non-directly adjacent energy storage unit, p∑ is the output power of all non-directly adjacent energy storage units, p k,max is the maximum output power of the kth non-directly adjacent energy storage unit.

[0082] Optionally, after controlling a plurality of non-directly adjacent energy storage units to adjust the charge and discharge power accordingly according to the charge and discharge power adjustment shares allocated to them in step S300, the method further includes:

[0083] Step S410, after a first preset adjustment cycle, obtaining a real-time temperature value of the current energy storage unit.

[0084] Step S420: If the current real-time temperature value of the energy storage unit is still greater than or equal to the preset temperature threshold, the charge and discharge power adjustment coefficient is calculated again, and the power adjustment value is allocated.

[0085] After completing the adjustment of the charging and discharging power of several non-directly adjacent energy storage units according to the allocated shares, the present invention also includes a subsequent temperature monitoring and response mechanism: first, the real-time temperature value of the current energy storage unit is obtained at the end of the first preset adjustment cycle. If the temperature is still greater than or equal to the preset temperature threshold, the charging and discharging power adjustment coefficient is recalculated, and then the power adjustment value is allocated again to continuously ensure that the energy storage unit is in a reasonable working state.

[0086] Optionally, after controlling a plurality of non-directly adjacent energy storage units to adjust the charge and discharge power accordingly according to the charge and discharge power adjustment shares allocated to them in step S300, the method further includes:

[0087] Step S510, after the second preset adjustment period, obtaining the real-time temperature values ​​of all non-directly adjacent energy storage units that have undergone power adjustment.

[0088] Step S520: If the real-time temperature value of a non-directly adjacent energy storage unit is also greater than or equal to the preset temperature threshold, the charging and discharging power adjustment coefficient is calculated and the power adjustment value is allocated.

[0089] After controlling the non-directly adjacent energy storage units to adjust the charge and discharge power according to the allocated shares, the real-time temperature values ​​of all the non-directly adjacent energy storage units that have made power adjustments will be obtained at the end of the longer second preset adjustment cycle. If the temperature value of a non-directly adjacent energy storage unit reaches or exceeds the preset temperature threshold, the charge and discharge power adjustment coefficient is calculated for it and the corresponding power adjustment value is allocated, so as to ensure that these non-directly adjacent energy storage units can also be in a suitable operating temperature range.

[0090] Among them, the time length of the second preset adjustment cycle is greater than the time length of the current detection cycle. The current detection cycle is usually short, and its main purpose is to quickly and frequently obtain the status information of the energy storage unit, so as to promptly discover key problems such as abnormal temperature rise that may affect the operation of the system, and quickly initiate preliminary countermeasures, such as allocating the power adjustment task of the abnormal energy storage unit to non-adjacent units. The longer second preset adjustment cycle provides enough time span to allow these potential temperature changes to fully develop and be accurately captured. For example, for some types of energy storage units with large thermal inertia, such as large-capacity lead-acid battery energy storage units, their temperature response to power changes may be delayed, and it may take several minutes or even longer to show obvious temperature changes externally. The second preset adjustment cycle can cover such a delay period, thereby ensuring that any temperature problems that may arise due to power adjustment will not be missed.

[0091] In addition, after controlling a plurality of non-directly adjacent energy storage units to adjust the charge and discharge power accordingly according to the charge and discharge power adjustment shares allocated to them in step S300, the method further includes:

[0092] Step S610, real-time detection of the real-time temperature value and charge state value of all energy storage units.

[0093] Step S620: If the real-time temperature value and / or the state of charge value of an energy storage unit changes abnormally, it is determined that the energy storage unit is in a fault state and the connection is disconnected.

[0094] Taking the abnormal jump of real-time temperature value as an example, it can include: short-term sharp rise, rapid irregular fluctuation and sudden drop. Among them, short-term sharp rise means that the temperature rises by more than 10°C or even higher in a very short time, such as within 1-2 seconds. This may be due to serious faults such as internal short circuit, which causes excessive current, thereby causing the internal resistance of the battery to increase sharply and generate a lot of heat, which is an obvious abnormal jump; rapid irregular fluctuation means rapid up and down fluctuations in a short period of time, and the fluctuation range exceeds the normal fluctuation range by more than 5°C, and there is no obvious periodicity and regularity. This may mean that the chemical reaction inside the battery is out of control or the battery management system fails and cannot effectively control the temperature of the battery; sudden drop in temperature by more than 5°C may be caused by loose or disconnected battery connection lines, resulting in the inability of current to pass normally, and the battery stops charging and discharging reactions, causing the temperature to drop rapidly.

[0095] The abnormal jumps of the state of charge value include: instant full charge or empty, rapid and large fluctuations, and changes that do not match the charge and discharge current. Among them, instant full charge or empty means that the state of charge value jumps directly from 50% to 100% or 0% in a very short time, such as 1-2 minutes. It may be that the battery management system has an error in monitoring the state of charge, or there is a serious self-discharge or overcharge phenomenon inside the battery; rapid and large fluctuations mean that the state of charge value fluctuates sharply for many times in a short time, such as within 5 minutes, with a fluctuation range of more than 20%. This may be due to the shedding of electrode materials inside the battery or problems with the balance between single cells in the battery pack, resulting in overcharge and discharge of some batteries, thereby affecting the state of charge of the entire energy storage unit; and the mismatch of charge and discharge current means that the change of the state of charge value differs from the theoretical change value corresponding to the actual charge and discharge current by more than 30%. There may be leakage, aging and other problems, resulting in abnormal jumps in the state of charge value.

[0096] Accordingly, please refer to Figure 2 A second aspect of an embodiment of the present invention provides a coordinated control device for multiple energy storage units, wherein the energy storage system includes a plurality of energy storage units arranged in a matrix, each energy storage unit is provided with a temperature sensor, and the coordinated control device includes:

[0097] Data acquisition module 1, which is used to obtain the real-time temperature value and charge state value of several energy storage units in the current detection cycle;

[0098] Data calculation module 2, which is used to calculate the charge and discharge power adjustment coefficient of the current energy storage unit based on the real-time temperature value and charge state value of all energy storage units and the frequency modulation data of the energy storage system when the real-time temperature value of the current energy storage unit is greater than or equal to the preset temperature threshold, and obtain the charge and discharge power adjustment value according to the initial value of the charge and discharge power of the current energy storage unit;

[0099] The power allocation module 3 is used to allocate the charge and discharge power adjustment value to several indirect adjacent energy storage units that are not directly adjacent to the current energy storage unit according to the preset power allocation rule, and control the several indirect adjacent energy storage units to adjust the charge and discharge power according to their respective allocated charge and discharge power adjustment shares.

[0100] Accordingly, a third aspect of an embodiment of the present invention provides an electronic device, comprising: at least one processor; and a memory connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor executes the above-mentioned collaborative control method of multiple energy storage units.

[0101] Accordingly, a fourth aspect of an embodiment of the present invention provides a computer-readable storage medium having computer instructions stored thereon, which, when executed by a processor, implement the above-mentioned coordinated control method of multiple energy storage units.

[0102] An embodiment of the present invention aims to protect a collaborative control method for multiple energy storage units, wherein the energy storage system includes a plurality of energy storage units arranged in a matrix, each energy storage unit being provided with a temperature sensor, and the collaborative control method includes the following steps: respectively obtaining the real-time temperature values ​​and state of charge values ​​of the plurality of energy storage units in the current detection cycle; when the real-time temperature value of the current energy storage unit is greater than or equal to a preset temperature threshold, based on the real-time temperature values ​​and state of charge values ​​of all energy storage units, in combination with the frequency modulation data of the energy storage system, calculating the charge and discharge power adjustment coefficient of the current energy storage unit, and obtaining the charge and discharge power adjustment value according to the initial charge and discharge power value of the current energy storage unit; according to the preset power allocation rule, allocating the charge and discharge power adjustment value to a plurality of non-directly adjacent energy storage units that are not directly adjacent to the current energy storage unit, and controlling the plurality of non-directly adjacent energy storage units to adjust the charge and discharge power accordingly according to their respective allocated charge and discharge power adjustment shares. The above technical scheme has the following effects:

[0103] 1. By comprehensively considering the temperature, state of charge and system frequency modulation data of the energy storage unit, the charging and discharging power adjustment coefficient and allocation ratio are determined, and refined power adjustment is performed according to the real-time status of each energy storage unit to avoid performance degradation or safety hazards caused by unreasonable charging and discharging of the energy storage unit, effectively improve the overall operating efficiency and stability of the energy storage system, and ensure that while meeting the system frequency modulation requirements, the energy storage unit is protected to the greatest extent and its service life is extended;

[0104] 2. The power adjustment value is allocated based on multiple state parameters and performance parameters of non-directly adjacent energy storage units, which fully taps the synergy potential between energy storage units in the matrix arrangement and realizes the flexible allocation of power between energy storage units with different characteristics, so that the energy storage system can better adapt to complex and changeable working conditions. Whether it is responding to instantaneous frequency modulation instructions or long-term energy storage and release tasks, each energy storage unit can perform its duties and cooperate with each other, reducing the occurrence of situations where the overall performance of the system is affected by overload or inefficiency of local units;

[0105] 3. During and after the power adjustment process, the temperature and charge status of the energy storage unit are continuously monitored, so that potential fault risks, such as abnormal jumps, can be discovered in time, and judgments and processing can be made quickly, that is, the faulty unit is disconnected. For energy storage units with temperatures exceeding the threshold or non-adjacent units affected by power adjustment, the adjustment coefficient and power allocation can be recalculated to form a closed-loop control, which not only reduces the probability of fault occurrence, but also can effectively isolate the fault point when a fault occurs, ensuring the normal operation of the rest of the energy storage system, and significantly enhancing the reliability and fault tolerance of the entire energy storage system.

[0106] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0107] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0108] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0109] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A coordinated control method for multiple energy storage units, characterized in that: The energy storage system includes a plurality of energy storage units arranged in a matrix, each energy storage unit is provided with a temperature sensor, and the collaborative control method includes the following steps: Respectively obtain the real-time temperature values ​​and charge state values ​​of a plurality of the energy storage units in the current detection cycle; When the real-time temperature value of the current energy storage unit is greater than or equal to the preset temperature threshold, the charge and discharge power adjustment coefficient of the current energy storage unit is calculated based on the real-time temperature values ​​and charge state values ​​of all energy storage units in combination with the frequency modulation data of the energy storage system, and the charge and discharge power adjustment value is obtained according to the initial value of the charge and discharge power of the current energy storage unit; According to a preset power allocation rule, the charge and discharge power adjustment value is allocated to a plurality of indirectly adjacent energy storage units that are not directly adjacent to the current energy storage unit, and the plurality of indirectly adjacent energy storage units are controlled to adjust the charge and discharge power accordingly according to the respective allocated charge and discharge power adjustment shares.

2. The coordinated control method of multiple energy storage units according to claim 1, characterized in that: The frequency regulation data includes: the control coefficient and time constant of the energy storage system participating in the primary frequency regulation and the comprehensive frequency regulation coefficient of the power system; The charge and discharge power adjustment value is the charge and discharge power initial value multiplied by the charge and discharge power adjustment coefficient, and the charge and discharge power initial value is the initial power allocation value when the current energy storage unit is charged and discharged; The current charging and discharging power adjustment coefficient of the energy storage unit is calculated by formula 1: Among them, K i is the current charging and discharging power regulation coefficient of the energy storage unit, T i is the real-time temperature value of the current energy storage unit, T ref is the standard operating temperature of the energy storage unit, T adj,j is the real-time temperature value of the jth adjacent energy storage unit, ω j is the weight coefficient of the real-time temperature value of the jth adjacent energy storage unit, n is the number of adjacent energy storage units, SOC i is the current state of charge of the energy storage unit, SOC avg is the average value of all adjacent energy storage units, SOC max and SOC min are the maximum and minimum state of charge of the current energy storage unit, respectively, c is the current charging efficiency of the energy storage unit, η d is the current charging efficiency of the energy storage unit, η c,avg is the average charging efficiency of all adjacent energy storage units, η d,avg is the average discharge efficiency of all adjacent energy storage units, K G and T G are the control coefficient and time constant of the energy storage system participating in primary frequency regulation, K sys is the comprehensive frequency regulation coefficient of the power system, s is the complex frequency variable in Laplace transform, λ1, λ2, λ3 are the coefficient values ​​related to the state of charge, charging and discharging efficiency and system frequency regulation respectively.

3. The coordinated control method of multiple energy storage units according to claim 1, characterized in that: The allocating the charge and discharge power adjustment value to a plurality of indirect adjacent energy storage units that are not directly adjacent to the current energy storage unit according to a preset power allocation rule specifically includes: Acquire state parameters and performance parameters of the plurality of non-directly adjacent energy storage units, the state parameters including: state of charge, health state, current ratio and battery internal resistance, and the performance parameters including: charge and discharge efficiency, discharge depth, cycle life and power capability; Based on the state parameter and performance parameter of each of the non-directly adjacent energy storage units, a ratio value of the charge and discharge power adjustment value correspondingly allocated to the non-directly adjacent energy storage unit is calculated.

4. The coordinated control method of multiple energy storage units according to claim 3, characterized in that: The ratio values ​​of the charge and discharge power adjustment values ​​correspondingly allocated to the non-directly adjacent energy storage units specifically include: The ratio value is calculated by formula 2: Among them, R k is the ratio of the charge and discharge power adjustment value allocated to the kth non-directly adjacent energy storage unit, ω SOC is the state of charge weight value, SOC k is the state of charge of the kth non-directly adjacent energy storage unit, SOC avg is the average state of charge of all non-directly adjacent energy storage units, SOC max SOC is the maximum state of charge of all non-directly adjacent energy storage units. min is the minimum state of charge among all non-directly adjacent energy storage units, ω SOH is the health status weight value, SOH k is the health status of the kth non-directly adjacent energy storage unit, SOH avg SOH is the average health status of all non-directly adjacent energy storage units. max SOH is the maximum state of charge of all non-directly adjacent energy storage units. min is the minimum state of charge among all non-directly adjacent energy storage units, ω DOD is the discharge depth weight value, DOD k is the discharge depth of the kth non-directly adjacent energy storage unit, DOD max is the maximum discharge depth of all non-directly adjacent energy storage units, ω Eff is the charge and discharge efficiency weight value, η k is the charge and discharge efficiency of the kth non-directly adjacent energy storage unit, η max is the maximum charge and discharge efficiency of all non-directly adjacent energy storage units, η min is the minimum charge and discharge efficiency of all non-directly adjacent energy storage units, ω Cycle is the cycle life weight value, Cycle life,k is the cycle life of the kth non-directly adjacent energy storage unit, Cycle max Cycle is the maximum cycle life of all non-directly adjacent energy storage units. min is the minimum cycle life of all non-directly adjacent energy storage units, ω Currnet is the current proportional weight value, i k is the current ratio of the kth non-directly adjacent energy storage unit, i j is the current ratio of the jth non-directly adjacent energy storage unit, n is the number of all non-directly adjacent energy storage units, ω Resistance is the weight value of the battery internal resistance, r k is the battery internal resistance of the kth non-directly adjacent energy storage unit, ω Power is the power capacity weight value, k k is the global power ratio allocated to the kth non-directly adjacent energy storage unit, p∑ is the output power of all non-directly adjacent energy storage units, p k,max is the maximum output power of the kth non-directly adjacent energy storage unit.

5. The coordinated control method of multiple energy storage units according to any one of claims 1 to 4, characterized in that: After the controlling of the plurality of non-directly adjacent energy storage units to adjust the charge and discharge power accordingly according to the respective allocated charge and discharge power adjustment shares, the method further comprises: After a first preset adjustment cycle, obtaining a real-time temperature value of the current energy storage unit; If the current real-time temperature value of the energy storage unit is still greater than or equal to the preset temperature threshold, the charge and discharge power adjustment coefficient is calculated again, and the power adjustment value is allocated.

6. The coordinated control method of multiple energy storage units according to any one of claims 1 to 4, characterized in that: After the controlling of the plurality of non-directly adjacent energy storage units to adjust the charge and discharge power accordingly according to the respective allocated charge and discharge power adjustment shares, the method further comprises: After the second preset adjustment period, obtaining real-time temperature values ​​of all non-directly adjacent energy storage units that have undergone power adjustment; If the real-time temperature value of the non-directly adjacent energy storage unit is also greater than or equal to the preset temperature threshold, then the charging and discharging power adjustment coefficient thereof is calculated, and a power adjustment value is allocated; The time length of the second preset adjustment period is greater than the time length of the current detection period.

7. The coordinated control method of multiple energy storage units according to claim 1, characterized in that: After the controlling of the plurality of non-directly adjacent energy storage units to adjust the charge and discharge power accordingly according to the respective allocated charge and discharge power adjustment shares, the method further includes: Real-time detection of the real-time temperature and state of charge of all energy storage units; If the real-time temperature value and / or the state of charge value of the energy storage unit changes abnormally, it is determined that the energy storage unit is in a fault state and is disconnected.

8. A coordinated control device for multiple energy storage units, characterized in that: include: A data acquisition module, used to respectively acquire the real-time temperature values ​​and charge state values ​​of a plurality of the energy storage units in the current detection cycle; A data calculation module, used to calculate the charge and discharge power adjustment coefficient of the current energy storage unit based on the real-time temperature values ​​and charge state values ​​of all energy storage units and the frequency modulation data of the energy storage system when the real-time temperature value of the current energy storage unit is greater than or equal to a preset temperature threshold, and obtain the charge and discharge power adjustment value according to the initial value of the charge and discharge power of the current energy storage unit; A power allocation module is used to allocate the charge and discharge power adjustment value to a plurality of indirectly adjacent energy storage units that are not directly adjacent to the current energy storage unit according to a preset power allocation rule, and control the plurality of indirectly adjacent energy storage units to adjust the charge and discharge power accordingly according to the charge and discharge power adjustment shares allocated to them.

9. An electronic device, characterized in that: include: at least one processor; And a memory connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor executes the collaborative control method of multiple energy storage units as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: Computer instructions are stored thereon, and when the instructions are executed by a processor, a coordinated control method for multiple energy storage units as described in any one of claims 1-7 is implemented.

Images