A megawatt-class energy storage battery management and control system

Abstract

The present invention belongs to the technical field of energy storage battery management, and specifically discloses a megawatt-class energy storage battery management and control system, which comprises: analyzing the imbalance rate of single cells in a megawatt-class energy storage battery management warehouse, determining the expected voltage regulation amplitude of each single cell, defining a single cell group for voltage balance regulation, and performing group regulation; judging the replacement of single cells by analyzing the balance regulation level of each single cell within a set detection time limit; determining the regulation speed of the corresponding fan operation function of the single cell by analyzing the thermal runaway metric of each single cell, monitoring the heat characteristics of the warehouse body after the corresponding fan regulation of the single cell in the megawatt-class energy storage battery management warehouse, analyzing the heat regulation effect pointing mark, and adjusting the operation speed of the fan in the management warehouse accordingly; understanding the influence of single cells at different positions on the voltage balance process by identifying the diffusion characteristics of the voltage balance regulation operation path.

Description

Technical Field

[0001] The invention belongs to the technical field of energy storage battery management and relates to a megawatt-level energy storage battery management and control system. Background Art

[0002] With the rapid development of renewable energy technology and the continuous transformation of the global energy structure, large-scale energy storage systems have become an important infrastructure to support smart grids and promote the construction of energy Internet. As an important representative of energy storage technology, megawatt-class energy storage battery systems have shown great potential in power peak regulation, distributed energy access, microgrid construction and other fields due to their high energy density, long cycle life and rapid response capabilities. However, with the expansion of energy storage scale, the management and control of megawatt-class energy storage battery systems face great challenges.

[0003] In the prior art, there are also some related solutions related to voltage balancing and regulation of energy storage batteries. For example, Chinese Patent Publication No. CN114914994A discloses a control method and system for energy storage batteries, which detects the voltage of each energy storage battery during the charging process through a battery management system, and compares the detected voltage with the charging upper limit protection voltage value; when the first voltage of the first energy storage battery is greater than or equal to the charging upper limit protection voltage value, the battery management system starts to balance the battery. After the balancing is started, the battery management system controls the discharge of the first energy storage battery to delay the time for it to reach the protection voltage value, and the charging time of other energy storage batteries is also extended accordingly, which helps to increase the power of the entire battery system.

[0004] Although the above schemes have proposed some solutions for voltage balancing and regulation of energy storage batteries, the existing voltage balancing and regulation of energy storage batteries still has the following limitations: 1. When performing voltage balancing and regulation on energy storage batteries, the energy consumption conflict of synchronous regulation of multiple batteries is not considered. Since the health performance of each battery in the battery pack may be different, the regulation strategy is complicated and there may be certain synchronous regulation conflicts. Therefore, when performing voltage balancing and regulation, the actual health of the battery pack should be considered to avoid excessive regulation that may lead to battery performance degradation or damage.

[0005] 2. The heat distribution of the single cells in the energy storage battery management bin was not deeply considered during the balanced regulation of the single cells, which resulted in a lack of accuracy in the fan operation regulation strategy. At the same time, there was a lack of combined analysis of the heat characteristics of the bin and the heat of the single cells themselves, making it difficult to promptly detect and resolve the risk of heat accumulation inside the bin. Summary of the invention

[0006] In view of this, in order to solve the problems raised in the above background technology, a megawatt-level energy storage battery management and control system is now proposed.

[0007] The purpose of the present invention can be achieved through the following technical solutions: The present invention provides a megawatt-class energy storage battery management and control system, which includes a voltage control module, a heat dissipation control module and a battery life monitoring module.

[0008] The voltage control module includes a balancing control unit and a replacement judgment unit.

[0009] The balancing control unit is used to detect the operating voltage of each single cell in the megawatt-class energy storage battery management warehouse, analyze the imbalance rate of the single cell in the megawatt-class energy storage battery management warehouse, and then perform voltage balancing control on each single cell through the control panel, and number each single cell as 1, 2, ...d..., c.

[0010] The replacement judgment unit is used to analyze the balance control level of each single battery within a set detection time limit and determine the replacement of the single battery.

[0011] The heat dissipation control module includes a single battery heat detection unit and a compartment heat detection unit.

[0012] The single cell heat detection unit is used to monitor the heat status of each single cell itself and adjust its own fan.

[0013] The warehouse heat detection unit is used to determine the voltage regulation moments of the megawatt-class energy storage battery management warehouse within a specified period, and number each voltage regulation moment as 1, 2, ...g..., s, detect the heat accumulation characteristics of the megawatt-class energy storage battery management warehouse after the corresponding regulation at each voltage regulation moment within the specified period, analyze the heat regulation effect pointing to the mark η in the megawatt-class energy storage battery management warehouse, and perform secondary heat regulation.

[0014] The battery life monitoring module is used to determine whether the distribution position of the single cells in the megawatt-class energy storage battery management warehouse has an obstructive effect on the heat diffusion of the warehouse body.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention analyzes the imbalance rate of the single cells in the megawatt-level energy storage battery management warehouse and determines whether to perform voltage balancing control on each single cell through the control panel, thereby avoiding unnecessary operations and waste of resources. The expected voltage control range of each single cell is determined accordingly, which helps to achieve more refined control. At the same time, by defining the single cell groups for voltage balancing control, group control is performed to reduce the conflicts caused by the excessive synchronous control range of the battery voltage in the megawatt-level energy storage battery management warehouse.

[0016] (2) The present invention can comprehensively and accurately evaluate the performance status of the battery by analyzing the balance control level of each single cell within a set detection time limit, and further scientifically guide the replacement of the single cell.

[0017] (3) The present invention effectively prevents battery damage or safety accidents caused by overheating by determining the control speed of the fan operating function corresponding to the single cell, and monitors the heat characteristics of the warehouse after the fan corresponding to the single cell is controlled in the megawatt-class energy storage battery management warehouse. The heat distribution status can be fully understood, and the heat control effect pointing mark can be further analyzed to accurately determine which areas may have the risk of heat accumulation. The operating speed of the fan in the management warehouse can be adjusted accordingly, which can optimize the overall heat distribution and improve the heat dissipation efficiency.

[0018] (4) By identifying the diffusion characteristics of the voltage balancing control operation path, the present invention can understand the mutual influence of single cells at different positions during the voltage balancing process, which helps to find the heat diffusion bottleneck or obstruction area that may exist in the battery layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the connection of the system modules of the present invention.

[0021] Figure 2 It is a schematic diagram of the content of the implementation unit of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1 As shown, the present invention provides a megawatt-class energy storage battery management and control system, which includes a voltage control module, a heat dissipation control module and a battery life monitoring module.

[0024] The voltage control module is connected to the heat dissipation control module, and the heat dissipation control module is connected to the battery life monitoring module.

[0025] See also Figure 2 As shown, the voltage control module includes a balancing control unit and a replacement judgment unit.

[0026] The balancing control unit is used to detect the operating voltage of each single cell in the megawatt-class energy storage battery management warehouse, analyze the imbalance rate of the single cell in the megawatt-class energy storage battery management warehouse, and then perform voltage balancing control on each single cell through the control panel, and number each single cell as 1, 2, ...d..., c.

[0027] In a preferred embodiment, the imbalance rate of the single battery in the megawatt-class energy storage battery management warehouse is analyzed, and the evaluation formula is: Among them, U d Represents the operating voltage of the dth single cell in the megawatt-class energy storage battery management warehouse, U( d-1 ) represents the operating voltage of the d-1th single cell, △U represents the preset reference voltage difference, c represents the number of single cells, and then the imbalance rate of the single cells in the megawatt-class energy storage battery management warehouse is compared with the preset benchmark imbalance rate. When the imbalance rate of the single cells in the megawatt-class energy storage battery management warehouse exceeds the preset benchmark imbalance rate, the voltage balancing control of each single cell is performed through the control panel.

[0028] Further real-time monitoring and analysis can be performed to obtain the corresponding moments when the imbalance rate of the single cells in the megawatt-class energy storage battery management warehouse exceeds the preset benchmark imbalance rate within a specified period.

[0029] In a further preferred embodiment, the voltage balancing control of each single cell specifically includes: comparing the operating voltage of each single cell in the megawatt-class energy storage battery management warehouse with the rated voltage of the single cell, taking the difference, and then obtaining the ratio of the difference to the preset reference difference, recorded as the load difference rate ρ of each single cell d .

[0030] The unit time discharge q and unit time application load C′ of each single battery in the application process are obtained from the megawatt-level energy storage battery application platform, and the health coefficient analysis formula is used to calculate the unit time discharge q and unit time application load C′ of each single battery in the application process. Detect the health factor of each single battery Where q0 is the preset power loss corresponding to the unit applied load, α is the preset power loss deviation correction factor, and e is a natural constant.

[0031] Determine the expected voltage regulation range of each single cell based on the load difference rate and health factor of each single cell in Indicates the preset standard health factor of a single battery.

[0032] Set each balanced control voltage amplitude definition interval, match the expected voltage control amplitude of each single cell with each balanced control voltage amplitude definition interval, group the single cells with the minimum difference between the expected voltage control amplitude and each balanced control voltage amplitude definition interval into the corresponding definition area, and in this way obtain the single cell group belonging to each balanced control voltage amplitude definition interval, and then perform voltage balanced control on the single cell group belonging to each balanced control voltage amplitude definition interval through the control panel according to the setting order of each balanced control voltage amplitude definition interval.

[0033] The corresponding content of the voltage balance regulation is to regulate the operating voltage according to the expected voltage regulation amplitude.

[0034] The present invention analyzes the imbalance rate of the single cells in the megawatt-level energy storage battery management warehouse to determine whether to perform voltage balancing control on each single cell through the control panel, thereby avoiding unnecessary operations and waste of resources. When voltage balancing control is required, the load difference rate and health factor of each single cell are detected, and the expected voltage control range of each single cell is determined accordingly. The load difference rate reflects the degree of deviation of the battery from the ideal state in actual use, while the health factor comprehensively evaluates the performance, life and other factors of the battery. These data provide a scientific basis for determining the expected voltage control range of each single cell, which is helpful to achieve more refined control, reduce the difference between batteries, and improve the overall health level. At the same time, by defining the single cell group for voltage balancing control, group control is performed to reduce the contradictions and conflicts caused by the excessive synchronous control range of the battery voltage in the megawatt-level energy storage battery management warehouse.

[0035] The replacement judgment unit is used to analyze the balance control level of each single battery within a set detection time limit and determine the replacement of the single battery.

[0036] In a preferred embodiment, the content of the replacement judgment unit includes: extracting the number of equalization control times of each single battery within the set detection time limit and the amplitude of each equalization control N( d,f ), f is the number of times of balancing control, f = 1, 2, ..., n.

[0037] Analyze the balance control level of each single battery within the set detection time limit It is compared with the preset benchmark balance control threshold level, and the single battery whose balance control level exceeds the preset benchmark balance control threshold level within the set detection time limit is replaced.

[0038] The present invention can comprehensively and accurately evaluate the performance status of the battery by analyzing the balance control level of each single cell within the set detection time limit. The balance control level reflects the performance of the battery in the system. This evaluation provides reliable data support for subsequent maintenance decisions and can scientifically guide the replacement of single cells.

[0039] The heat dissipation control module includes a single battery heat detection unit and a compartment heat detection unit.

[0040] The single cell heat detection unit is used to monitor the heat status of each single cell itself and adjust its own fan.

[0041] In a preferred embodiment, the thermal state of each single cell itself is monitored, including: setting a thermal monitoring time point in a megawatt-class energy storage battery management warehouse, using an infrared sensor to capture the infrared radiation of each single cell in the megawatt-class energy storage battery management warehouse at the thermal monitoring time point through infrared imaging technology to form a thermal distribution image of each single cell, applying computer vision and image processing algorithms to automatically extract the bright distribution area in the thermal distribution image of each single cell, setting a thermal threshold, marking the area above the thermal threshold in the thermal distribution image of each single cell as a heat source, marking the area below the thermal threshold as a heat sink, and extracting its thermal value, recorded as Q d , Q′ d , analyze the thermal runaway metric of each single cell Wherein △Q represents the preset reference heat difference, and Q0 represents the preset heat threshold of the single cell.

[0042] The setting standard of the heat monitoring time point is: after the power supply operation time of the megawatt-class energy storage battery management warehouse exceeds the specified time.

[0043] In a further preferred embodiment, the self-fan adjustment content includes: comparing the thermal runaway metric of each single cell with the preset conventional thermal runaway metric, if the thermal runaway metric of a single cell exceeds the preset conventional thermal runaway metric, then the single cell is recorded as the target cell, and then the thermal runaway metric of the target cell is selected from the thermal runaway metrics of each single cell. (0 ).

[0044] Extract the target cell's balanced control level λ0 from the balanced control levels of each cell within the set detection time limit, and determine the control speed of the target cell's corresponding fan operation function Wherein υ0 represents the preset basic operating speed of the fan operation function of the single cell, and then the corresponding fan of the target cell is independently regulated through the control panel.

[0045] The content of the independent regulation of the fan is the speed regulation.

[0046] The warehouse heat detection unit is used to determine the voltage regulation moments of the megawatt-class energy storage battery management warehouse within a specified period, and number each voltage regulation moment as 1, 2, ...g..., s, detect the heat accumulation characteristics of the megawatt-class energy storage battery management warehouse after the corresponding regulation at each voltage regulation moment within the specified period, analyze the heat regulation effect pointing to the mark η in the megawatt-class energy storage battery management warehouse, and perform secondary heat regulation.

[0047] In a preferred embodiment, the detection of heat accumulation characteristics of a megawatt-class energy storage battery management warehouse after corresponding regulation at each voltage regulation moment within a specified period includes: obtaining each voltage balancing regulation time of the megawatt-class energy storage battery management warehouse within the specified period as each voltage regulation moment of the megawatt-class energy storage battery management warehouse within the specified period.

[0048] The voltage balancing control times of the megawatt-class energy storage battery management warehouse within a specified period are the corresponding moments when the imbalance rate of the single cells in the megawatt-class energy storage battery management warehouse exceeds the preset benchmark imbalance rate.

[0049] According to the method of acquiring the heat distribution image of each single battery, the heat distribution image of the megawatt-class energy storage battery management warehouse after the corresponding regulation at each voltage regulation moment in a specified period is collected in a similar manner to detect the heat accumulation characteristics of the megawatt-class energy storage battery management warehouse after the corresponding regulation at each voltage regulation moment in a specified period.

[0050] The method for obtaining the aggregation features and the location of the aggregation points is as follows: identifying each bright color distribution area from the heat distribution image after the corresponding regulation of each voltage regulation moment in the megawatt-class energy storage battery management warehouse within a specified period, and locating the corresponding center position and edge position of each bright color distribution area, marking the corresponding center position of each bright color distribution area as each aggregation point, and extracting the color coordinate value of the corresponding center position and edge position of each aggregation point, matching it with the corresponding heat value of each preset color coordinate value, and determining the heat value of the corresponding center position and edge position of each aggregation point after the corresponding regulation of each voltage regulation moment, which are recorded as Identify the heat accumulation characteristics of a megawatt-class energy storage battery management warehouse after corresponding regulation at each voltage regulation time within a specified period Where Q′0 represents the preset heat threshold of the megawatt-class energy storage battery management warehouse, j represents the number of the aggregation point, j=1,2,…,b, and b represents the number of aggregation points.

[0051] In a further preferred embodiment, the analysis of the heat regulation effect pointing mark in the megawatt-class energy storage battery management warehouse includes: according to the heat distribution image formation mode of each single cell, similarly extracting the heat distribution image of each single cell before and after the corresponding regulation at each voltage regulation moment within the set detection time limit, marking the heat source and heat sink of each single cell before and after the corresponding regulation at each voltage regulation moment, and identifying its heat value, recorded as Q1 (d,g) , Q1′(d,g) 、Q2 (d,g) , Q2′ (d,g) , analyze the thermal runaway metric corresponding to the voltage balancing control operation of each single cell Where △Q′ represents the preset reference heat difference before and after the corresponding regulation of the voltage balancing operation, and s represents the number of voltage regulation moments.

[0052] With each voltage regulation moment as the horizontal coordinate and the heat accumulation characteristics after the corresponding regulation at each voltage regulation moment as the vertical coordinate, a heat accumulation change curve is constructed, and the change trend of the heat accumulation change curve is observed. It is matched with the preset hot charging factor corresponding to each change trend to obtain the hot charging factor hot in the megawatt-level energy storage battery management warehouse, and then the heat regulation effect direction mark in the megawatt-level energy storage battery management warehouse is analyzed.

[0053] The change trend of the temperature change curve includes an iterative trend, a decreasing trend, and a floating trend, and the identification method is: extract the number of peak points and the number of valley points from the temperature change curve. If the number of peak points and the number of valley points in the temperature change curve are both 1 and the peak point appears before the valley point, the change trend of the temperature change curve is recorded as a decreasing trend; if the number of peak points and the number of valley points in the temperature change curve are both 1 and the peak point appears after the valley point, the change trend of the temperature change curve is recorded as an iterative trend; if the number of peak points or the number of valley points in the temperature change curve is greater than 1, the change trend of the temperature change curve is recorded as a floating trend.

[0054] In a further preferred embodiment, the secondary heat regulation includes: according to the above-mentioned method for obtaining the load difference rate of each single cell, similarly extracting the load difference rate of each single cell at each voltage regulation moment in the megawatt-class energy storage battery management warehouse within a specified period, screening out each single cell whose load difference rate exceeds a preset load difference rate threshold, and screening out the single cell with the maximum difference value, which are recorded as the identified single cells at each voltage regulation moment in the megawatt-class energy storage battery management warehouse within the specified period.

[0055] Extract the position of the marked monomer at each voltage regulation moment in the megawatt-level energy storage battery management warehouse within the specified period, compare it with the layout position of the exhaust port of the megawatt-level energy storage battery management warehouse, and obtain the exhaust distance L of the marked monomer at each voltage regulation moment g .

[0056] Determine the expected control speed of the corresponding fan operation function of the megawatt-class energy storage battery management warehouse Among them, υ′0 represents the preset basic operating speed of the fan operation function of the single cell, L0 represents the preset reference exhaust distance, and then the corresponding fan of the megawatt-level energy storage battery management warehouse is regulated through the control panel.

[0057] The present invention can timely discover and prevent the occurrence of thermal runaway by analyzing the thermal runaway metric of each single cell, and determine the regulation speed of the fan operation function corresponding to the single cell accordingly, so as to realize precise control of the temperature of the single cell, effectively prevent battery damage or safety accidents caused by overheating, and monitor the heat characteristics of the warehouse body after the corresponding fan of the single cell is regulated in the megawatt-level energy storage battery management warehouse. In the megawatt-level energy storage battery management warehouse, due to the large number of batteries and their close arrangement, the heat distribution is often uneven. By monitoring the heat characteristics in the entire management warehouse, the heat distribution status can be fully understood, and the heat regulation effect pointing mark can be further analyzed to accurately determine which areas may have the risk of heat accumulation, and the running speed of the fan in the management warehouse can be adjusted accordingly, so as to optimize the overall heat distribution and improve the heat dissipation efficiency.

[0058] The battery life monitoring module is used to determine whether the distribution position of the single cells in the megawatt-class energy storage battery management warehouse has an obstructive effect on the heat diffusion of the warehouse body.

[0059] In a preferred embodiment, the battery life monitoring module includes: connecting the identified monomer positions belonging to each voltage regulation moment in a megawatt-class energy storage battery management warehouse within a specified period to form an identified monomer voltage balancing and regulation operation path in the megawatt-class energy storage battery management warehouse.

[0060] Taking the center point of the megawatt-class energy storage battery management warehouse as the origin, a three-dimensional space coordinate system is randomly constructed, and the position coordinates W of the identification monomers at each voltage regulation moment are marked in the three-dimensional space coordinate system. g =(X g , Y g , Z g ), analyze and identify the diffusion characteristics of the single-cell voltage balance regulation operation path Where (X( g+1 )、Y( g+1 )、Z( g+1 )) represents the position coordinates of the identification unit belonging to the g+1th voltage regulation moment, and △D represents the preset reference coordinate distance.

[0061] The diffusion characteristics of the identified single cell voltage balancing regulation operation path are compared with the preset diffusion characteristic threshold. If the diffusion characteristics of the identified single cell voltage balancing regulation operation path are lower than the preset diffusion characteristic threshold, it is determined that the distribution position of the single cells in the megawatt-level energy storage battery management warehouse has an obstructive effect on the heat diffusion of the warehouse body.

[0062] By identifying the diffusion characteristics of the voltage balancing control operation path, the present invention can understand the mutual influence of single cells in different positions during the voltage balancing process, which helps to find the heat diffusion bottlenecks or obstruction areas that may exist in the battery layout. In addition, based on these analyses, the battery layout can be optimized to reduce the obstacles to heat diffusion and improve the overall heat dissipation efficiency.

[0063] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, they shall all fall within the protection scope of the present invention.

Claims

1. A megawatt-class energy storage battery management and control system, characterized in that: The system includes a voltage control module, a heat dissipation control module and a battery life monitoring module; The voltage control module includes a balancing control unit and a replacement judgment unit; The balancing control unit is used to detect the operating voltage of each single cell in the megawatt-class energy storage battery management warehouse, analyze the imbalance rate of the single cell in the megawatt-class energy storage battery management warehouse, and then perform voltage balancing control on each single cell through the control panel, and number each single cell. The replacement judgment unit is used to analyze the balance control level of each single battery within the set detection time limit and determine the replacement of the single battery; The heat dissipation control module includes a single battery heat detection unit and a bin body heat detection unit; The single cell heat detection unit is used to monitor the heat status of each single cell itself and adjust its own fan; The warehouse heat detection unit is used to determine each voltage regulation time of the megawatt-class energy storage battery management warehouse within a specified period, and number each voltage regulation time as , detect the heat accumulation characteristics of the megawatt-level energy storage battery management warehouse after the corresponding regulation at each voltage regulation time within a specified period, and analyze the heat regulation effect pointing mark in the megawatt-level energy storage battery management warehouse , perform secondary heat regulation; The battery life monitoring module is used to determine whether the distribution position of the single cells in the megawatt-class energy storage battery management warehouse has an obstructive effect on the heat diffusion of the warehouse body.

2. A megawatt-class energy storage battery management and control system according to claim 1, characterized in that: The above analysis of the imbalance rate of single cells in the megawatt-level energy storage battery management warehouse is evaluated by the formula: ,in, Indicates the megawatt-class energy storage battery management warehouse The operating voltage of a single cell, Indicates The operating voltage of a single cell, Indicates the preset reference voltage difference, It represents the number of single cells, and then compares the imbalance rate of the single cells in the megawatt-class energy storage battery management warehouse with the preset reference imbalance rate. When it exceeds the preset reference imbalance rate, the voltage of each single cell is balanced and regulated through the regulation panel.

3. A megawatt-class energy storage battery management and control system according to claim 1, characterized in that: The voltage balancing and control of each single battery specifically includes: According to the operating voltage of each single battery in the megawatt-class energy storage battery management warehouse, detect the load difference rate of each single battery; Obtain the discharge amount per unit time and the applied load amount per unit time of each single battery during the application process, and detect the health factor of each single battery; Determine the expected voltage regulation range of each single battery; Set each balanced control voltage amplitude definition interval, match the expected voltage control amplitude of each single cell with each balanced control voltage amplitude definition interval, group the single cells with the minimum difference between the expected voltage control amplitude and each balanced control voltage amplitude definition interval into the corresponding definition area, and in this way obtain the single cell group belonging to each balanced control voltage amplitude definition interval, and then perform voltage balanced control on the single cell group belonging to each balanced control voltage amplitude definition interval through the control panel according to the setting order of each balanced control voltage amplitude definition interval.

4. A megawatt-class energy storage battery management and control system according to claim 1, characterized in that: The content of the replacement judgment unit includes: extracting the number of equalization control times and the amplitude of each equalization control of each single battery within the set detection time limit from the control plate , is the number of times of balanced regulation, ; Analyze the balance control level of each single battery within the set detection time limit , compare it with the preset benchmark balance control threshold level, and replace the single battery whose balance control level exceeds the preset benchmark balance control threshold level within the set detection time limit.

5. A megawatt-class energy storage battery management and control system according to claim 1, characterized in that: The monitoring of the thermal state of each single cell includes: capturing the thermal distribution image of each single cell, applying computer vision and image processing algorithms to automatically extract the bright distribution area in the thermal distribution image of each single cell, setting a thermal threshold, marking the area above the thermal threshold in the thermal distribution image of each single cell as a heat source, marking the area below the thermal threshold as a heat sink, extracting the thermal value, and analyzing the thermal runaway metric of each single cell.

6. A megawatt-class energy storage battery management and control system according to claim 5, characterized in that: The self-fan adjustment content includes: comparing the thermal runaway metric of each single cell with the preset conventional thermal runaway metric, if the thermal runaway metric of a single cell exceeds the preset conventional thermal runaway metric, then the single cell is recorded as a target cell, and then the thermal runaway metric of the target cell is selected from the thermal runaway metric of each single cell. ; Extract the balanced regulation level of the target monomer , determine the control speed of the corresponding fan operation function of the target unit , where Indicates the preset basic operating speed of the fan operation function of the single cell, and then independently regulates the corresponding fan of the target cell through the regulation plate.

7. A megawatt-class energy storage battery management and control system according to claim 6, characterized in that: The method for detecting heat accumulation characteristics of a megawatt-class energy storage battery management warehouse after corresponding regulation at each voltage regulation moment within a specified period includes: obtaining each voltage balancing regulation time of the megawatt-class energy storage battery management warehouse within the specified period as each voltage regulation moment of the megawatt-class energy storage battery management warehouse within the specified period; and detecting heat accumulation characteristics of the megawatt-class energy storage battery management warehouse after corresponding regulation at each voltage regulation moment within the specified period by collecting heat distribution images of the megawatt-class energy storage battery management warehouse after corresponding regulation at each voltage regulation moment within the specified period.

8. A megawatt-class energy storage battery management and control system according to claim 7, characterized in that: The analysis of the heat regulation effect pointing mark in the megawatt-level energy storage battery management warehouse includes: extracting the heat distribution image of each single cell before and after the corresponding regulation at each voltage regulation moment within the set detection time limit, marking the heat source and heat sink of each single cell before and after the corresponding regulation at each voltage regulation moment, and identifying its heat value, which is recorded as , , analyze the thermal runaway metric corresponding to the voltage balancing control operation of each single cell , where Indicates the preset reference heat difference before and after the voltage balancing operation. Indicates the number of voltage regulation moments; Construct a heat accumulation change curve, observe the change trend of the heat accumulation change curve, match it with the preset heat charging factor corresponding to each change trend, and obtain the heat charging factor in the megawatt-level energy storage battery management warehouse , and then analyze the heat regulation effect in the megawatt-level energy storage battery management warehouse .

9. A megawatt-class energy storage battery management and control system according to claim 1, characterized in that: The battery life monitoring module includes: connecting the marked monomer positions at each voltage regulation moment in the megawatt-class energy storage battery management warehouse within a specified period to form a voltage balancing and regulation operation path for the marked monomers in the megawatt-class energy storage battery management warehouse; Taking the center point of the megawatt-class energy storage battery management warehouse as the origin, a three-dimensional space coordinate system is randomly constructed, and the position coordinates of the identification monomers at each voltage regulation moment are marked in the three-dimensional space coordinate system. , analyze and identify the diffusion characteristics of the single-cell voltage balance regulation operation path ,in Indicates The position coordinates of the identification unit at each voltage regulation moment, Indicates the preset reference coordinate distance; The diffusion characteristics of the identified single cell voltage balancing regulation operation path are compared with the preset diffusion characteristic threshold. If the diffusion characteristics of the identified single cell voltage balancing regulation operation path are lower than the preset diffusion characteristic threshold, it is determined that the distribution position of the single cells in the megawatt-level energy storage battery management warehouse has an obstructive effect on the heat diffusion of the warehouse body.

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