Balanced control system and method for stacked series energy storage battery pack
By setting up the battery pack signal monitoring end in the stacked series energy storage battery pack, collecting data, establishing a translation model, analyzing differences, and generating control strategies, the internal imbalance problem of battery packs is solved, and management efficiency and energy utilization are improved. Extend service life.
Patent Information
- Application Number
- CN202411746600.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2024-12-31
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The prior art is difficult to effectively solve the problem of imbalance inside the stacked series energy storage battery pack, resulting in low management efficiency, low energy utilization and short service life.
By setting up the signal monitoring end of the battery pack, collecting basic status data, establishing a battery translation model, conducting group differences analysis, generating modification factors, building information communication channels, optimizing the battery pack's balanced control strategy, and improving overall performance and safety.
It improves the management efficiency of the battery pack, improves energy utilization, optimizes performance, and extends service life.
Smart Images
Figure CN119231718A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of battery balancing control, and in particular to a balancing control system and method for a stacked series energy storage battery pack. Background Art
[0002] In recent years, with the development and application of renewable energy technology, energy storage battery packs have been increasingly used in power systems, especially for stacked series energy storage battery packs, which have the advantages of compact structure and high energy density, and have become a research hotspot in the field of energy storage. However, there are imbalances inside the battery pack, which mainly include uneven power distribution at both ends, performance differences of single cells, and interactions between batteries. In the prior art, although the imbalance between battery packs is manually intervened, the problem of imbalance within the battery pack is not well solved. Problems such as the efficiency of balancing adjustment, low energy utilization, overall performance and service life of the battery pack are problems that we need to solve. To this end, a balancing control system and method for a stacked series energy storage battery pack are provided. Summary of the invention
[0003] In order to solve the above technical problems, the object of the present invention is to provide a method for balancing and controlling a stacked series energy storage battery pack, comprising the following steps: Step S1: Setting a battery pack signal monitoring terminal, monitoring and collecting basic status data of the battery pack, and establishing a battery translation model according to the basic status data of the battery pack; Step S2: performing inter-group difference analysis on the battery group according to the battery translation model and the basic state data of the battery group, obtaining the modification factor, and generating a group level strategy according to the battery translation model, the basic state data of the battery group and the modification factor; Step S3: constructing a battery information communication channel according to the group level strategy and the modification factor, and performing balanced control on the battery group according to the battery information communication channel and the basic state data of the battery group to generate a group constant coefficient; Step S4: According to the battery constant coefficient and the battery information communication channel, the battery pack operation is planned and controlled to generate a battery pack control strategy.
[0004] Furthermore, a process of setting a battery pack signal monitoring terminal, monitoring and collecting basic status data of the battery pack, and establishing a battery translation model according to the basic status data of the battery pack includes: The battery pack signal monitoring terminal is used to collect basic status data of the battery pack; the battery pack signal monitoring terminal includes a plurality of single cell signal monitoring terminals; the basic status data of the battery pack includes a plurality of single cell basic status data and battery pack structure data; The single cell basic status data includes single cell basic data, single cell status data and single cell structure data; the single cell basic data includes single cell voltage, single cell current, single cell capacity, single cell internal resistance, single cell operating time and single cell self-discharge rate; the single cell status data includes state of charge value, health state value and single cell temperature; Construct each single cell region according to each single cell and the single cell basic data in the single cell, construct a group cell region according to each single cell region in the battery pack and the single cell structure data, and establish a battery translation model according to each group cell region and the battery pack structure data; A translation cycle is set, and the battery pack signal monitoring end collects the basic battery pack status data of each battery pack according to the translation cycle, and maps the basic battery pack status data to the translation model, and updates the translation model in real time.
[0005] Furthermore, based on the battery translation model and the basic status data of the battery pack, the process of performing inter-group difference analysis on the battery pack includes: According to the battery translation model and the basic status data of the battery pack, the maximum state of charge value and the minimum state of charge value of the single battery in the battery pack are obtained, and the health state value of the single battery corresponding to the maximum state of charge value and the health state value of the single battery corresponding to the minimum state of charge value are obtained. According to the maximum state of charge value of the single battery in the battery pack and the health state value corresponding to the single battery, the x state coefficient is obtained; according to the minimum state of charge value of the single battery in the battery pack and the health state value corresponding to the single battery, the y state coefficient is obtained; according to the x state coefficient and the y state coefficient, the drift coefficient is obtained; the zero drift coefficient is set; according to the zero drift coefficient and the drift coefficient, the balanced state of the single battery is judged, when the single battery in the battery pack is in a relatively unbalanced state, the modified floating coefficient is set, and the modified upper coefficient is obtained according to the x state coefficient and the modified floating coefficient; according to the y state coefficient and the modified floating coefficient, the modified lower coefficient is obtained; according to the single battery current and the single battery running time, the single battery The battery capacity value is obtained; according to the battery capacity value of each single battery, the modified upper coefficient and the modified lower coefficient, the upper coefficient and the lower coefficient are obtained, and the upper category label and the lower category label are marked respectively; the category label is marked according to the remaining independent single batteries in the battery pack; the upper category label, the category label and the lower category label are all marked for the whole group, and the grouping of the single batteries can be obtained according to the upper category label, the category label and the lower category label; according to the battery translation model and the upper category label, the category label and the lower category label in the battery pack, each single battery is numbered; the batteries in the same group of single batteries are analyzed, the condition factor is set, and the condition coefficient of the single batteries in the same group is obtained according to the single battery capacity, the single battery self-discharge rate and the condition factor of each single battery; according to the condition coefficient of each single battery in the same group, the floating condition coefficient is obtained; according to the upper quantity coefficient or the lower quantity coefficient of each single battery in the same group, the same quantity coefficient is obtained; and according to the floating condition coefficient and the same quantity coefficient, the modification factor is obtained.
[0006] Furthermore, based on the battery translation model, the basic status data of the battery pack and the modification factors, the process of generating the component level strategy includes: The upper-level attribute label, the level-level attribute label and the lower-level attribute label of the single battery are synchronously updated to the battery translation model, and the modification factor is marked in the battery translation model; the number of upper-level attribute labels and the number of lower-level attribute labels in the battery group are obtained, and the total number of level-level attribute labels is obtained according to the number of upper-level attribute labels and the number of lower-level attribute labels, and the composition coefficient is obtained according to the number of upper-level attribute labels and the total number of level-level attribute labels in the battery group; the composition period is set, and the horizontal reference period is obtained according to the composition coefficient and the composition period; when the time is at the node where the horizontal reference period is located within the composition period, the battery translation model is grouped and judged, the composition threshold is set, and the composition level strategy is generated according to the modification factor and the composition threshold.
[0007] Furthermore, according to the component level strategy and the modification factors, the process of constructing the battery information communication channel includes: A high-voltage charging circuit unit is set up; according to the group level strategy and the modification factor, an information communication channel is established between a single battery containing a previous modification label and a single battery containing a next modification label, and an information communication channel is established between battery groups, and a battery information communication channel is constructed according to the information communication channel between single batteries, the information communication channel between battery groups and the high-voltage charging circuit unit.
[0008] Furthermore, according to the battery information communication channel and the basic status data of the battery pack, the process of balancing the battery pack includes: Acquire basic status data of battery packs in real time, monitor the single cell current of each single cell in each battery pack, and obtain the current distribution coefficient according to the single cell current in each battery pack; set the current distribution coefficient threshold; obtain the battery pack constant coefficient according to the current distribution coefficient, the current distribution coefficient threshold and the state of charge value of the single cell in the battery pack.
[0009] Furthermore, the battery pack operation is planned and controlled according to the constant coefficient and the battery information communication channel, and the process of generating the battery pack control strategy includes: The battery group is planned and judged according to the group constant coefficient and the drift coefficient; when the group constant coefficient is less than the drift coefficient, the battery group does not need to be planned, and the battery group is recorded as a battery drift group; when the group constant coefficient is greater than or equal to the drift coefficient, the battery group operation is planned and controlled to generate a battery group control strategy.
[0010] In another embodiment of the present invention, the present invention further discloses a balancing control system for a stacked series energy storage battery pack, including a main control center, wherein the main control center is communicatively connected to a battery data acquisition module, a battery pack analysis module, a battery pack management module, and a battery balancing control module; The battery data acquisition module is used to set a battery pack signal monitoring terminal, collect battery pack basic status data, and establish a battery translation model based on the battery pack basic status data; The battery pack analysis module is used to perform inter-group difference analysis on the battery pack according to the battery translation model and the basic state data of the battery pack, obtain the modification factor, and generate the group level strategy according to the battery translation model, the basic state data of the battery pack and the modification factor; The battery pack management module is used to construct a battery information communication channel according to the group level strategy and the modification factor, and to perform balanced control on the battery pack according to the battery information communication channel and the basic state data of the battery pack to generate a group constant coefficient; The battery balancing control module is used to plan and control the operation of the battery pack according to the battery constant coefficient and the battery information communication channel, and generate a battery pack control strategy.
[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: a battery pack signal monitoring terminal is set to collect basic status data of the battery pack, and a battery translation model is established according to the basic status data of the battery pack, so as to improve the management efficiency of the battery pack; according to the battery translation model and the basic status data of the battery pack, the inter-group difference analysis of the battery pack is performed to obtain the modification factor, and according to the battery translation model, the basic status data of the battery pack and the modification factor, a group level strategy is generated, so as to improve the overall energy utilization rate of the battery pack; according to the group level strategy and the modification factor, a battery information communication channel is constructed, and according to the battery information communication channel and the basic status data of the battery pack, the battery pack is balanced and controlled to generate a group constant coefficient, so as to optimize the performance of the battery pack and improve the safety of the battery pack; according to the group constant coefficient and the battery information communication channel, the operation of the battery pack is planned and controlled, and a battery pack control strategy is generated, so as to extend the service life of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a flow chart of a method for balancing a stacked series energy storage battery pack according to an embodiment of the present application.
[0013] Figure 2 This is a schematic diagram of a balancing control system for a stacked series energy storage battery pack according to an embodiment of the present application. DETAILED DESCRIPTION
[0014] like Figure 1 As shown, a method for balancing a stacked series energy storage battery pack comprises the following steps: Step S1: Setting a battery pack signal monitoring terminal, monitoring and collecting basic status data of the battery pack, and establishing a battery translation model according to the basic status data of the battery pack; Step S2: performing inter-group difference analysis on the battery group according to the battery translation model and the basic state data of the battery group, obtaining the modification factor, and generating a group level strategy according to the battery translation model, the basic state data of the battery group and the modification factor; Step S3: constructing a battery information communication channel according to the group level strategy and the modification factor, and performing balanced control on the battery group according to the battery information communication channel and the basic state data of the battery group to generate a group constant coefficient; Step S4: According to the battery constant coefficient and the battery information communication channel, the battery pack operation is planned and controlled to generate a battery pack control strategy.
[0015] It should be further explained that, in the specific implementation process, the process of setting a battery pack signal monitoring terminal, monitoring and collecting basic status data of the battery pack, and establishing a battery translation model according to the basic status data of the battery pack includes: The battery pack signal monitoring terminal is arranged at a data generating terminal in each battery pack, and is used to collect basic status data of the battery pack; the battery pack signal monitoring terminal includes a plurality of single cell signal monitoring terminals; the basic status data of the battery pack includes a plurality of single cell basic status data and battery pack structure data; the single cell signal monitoring terminal is arranged at a data generating terminal in a single cell, and is used to collect the single cell basic status data of the corresponding single cell; It should be further explained that, in the specific implementation process, the battery pack structure data refers to the connection position relationship between battery packs; The single cell basic status data includes single cell basic data, single cell status data and single cell structure data; the single cell basic data includes single cell voltage, single cell current, single cell capacity, single cell internal resistance, single cell operating time and single cell self-discharge rate; the single cell status data includes state of charge value, health state value and single cell temperature; the single cell structure data refers to the connection position relationship between all single cells in the same battery pack; Construct each single cell region according to each single cell and the single cell basic data in the single cell, construct a group cell region according to each single cell region in the battery pack and the single cell structure data, and establish a battery translation model according to each group cell region and the battery pack structure data; It should be further explained that, in the specific implementation process, the battery translation model can manage each battery pack in an orderly manner and visualize the composition and operation of the battery packs; A translation cycle is set, and the battery pack signal monitoring end collects the basic battery pack status data of each battery pack according to the translation cycle, and maps the basic battery pack status data to the translation model, and updates the translation model in real time.
[0016] It should be further explained that, in the specific implementation process, according to the battery translation model and the basic state data of the battery pack, the inter-group difference analysis of the battery pack is carried out to obtain the modification factor, and according to the battery translation model, the basic state data of the battery pack and the modification factor, the process of generating the group level strategy includes: According to the battery translation model and the basic status data of the battery group, the inter-group difference analysis of the battery group was carried out to obtain the modification factors; It should be further explained that, in the specific implementation process, the process of performing inter-group difference analysis on the battery group according to the battery translation model and the basic status data of the battery group includes: performing drift judgment on each battery group according to the battery translation model and the basic status data of the battery group, obtaining the maximum state of charge value and the minimum state of charge value of the single battery in the battery group, and obtaining the health status value of the single battery corresponding to the maximum state of charge value and the health status value of the single battery corresponding to the minimum state of charge value, calculating the ratio of the maximum state of charge value of the single battery in the battery group to the health status value corresponding to the single battery, and obtaining the x state coefficient; calculating the ratio of the minimum state of charge value of the single battery in the battery group to the health status value corresponding to the single battery, and obtaining y state coefficient; calculate the difference between the x state coefficient and the y state coefficient to obtain the drift coefficient; set the zero drift coefficient; when the drift coefficient is less than or equal to the zero drift coefficient, all the cells in the corresponding battery pack are in a relatively balanced state; when the drift coefficient is greater than the zero drift coefficient, the cells in the corresponding battery pack are in a relatively unbalanced state; set the modified floating coefficient, calculate the difference between the x state coefficient and the modified floating coefficient to obtain the modified upper coefficient; calculate the difference between the y state coefficient and the modified floating coefficient to obtain the modified lower coefficient; perform integral calculation based on the cell current and the cell running time to obtain the cell power value; make judgments based on the cell power value, the modified upper coefficient and the modified lower coefficient of each cell The relationship between adjacent single batteries is determined. The relationship between the single battery power value of a single battery and the modified upper coefficient and the modified lower coefficient is determined. When the single battery power value of a single battery is greater than the modified upper coefficient, the single battery power value of the single battery and the modified upper coefficient are calculated by difference to obtain the upper coefficient. The single battery power values of the adjacent single batteries of the single battery are determined until the single battery power value is less than or equal to the modified upper coefficient, and the adjacent single batteries whose single battery power values are greater than the modified upper coefficient are grouped together and marked with an upper label. When the single battery power value of a single battery is less than the modified lower coefficient, the single battery power value of the single battery and the modified lower coefficient are calculated by difference to obtain the lower coefficient. The single battery power values of the adjacent single batteries of the single battery are determined by difference. The value is judged until the battery power value is greater than or equal to the modified next coefficient, and the adjacent batteries whose battery power value is less than the modified next coefficient are grouped together and marked with the lower-level label; if there are remaining independent batteries in the battery pack, each independent battery is grouped together and marked with the level label; the upper level label, the level label and the lower level label are all group labels, and the grouping of each battery can be obtained according to the upper level label, the level label and the lower level label; according to the battery translation model and the upper level label, the level label and the lower level label in the battery pack, each battery is numbered, recorded as i, i=1, 2, 3, ..., n, n is a positive integer, and the number of each battery is associated with the label;Analyze the batteries in the same group of cells, set the condition factor, which is related to the degree of influence of the cell temperature on the cell, calculate the product of the cell capacity, the cell self-discharge rate and the condition factor of each cell, and obtain the condition coefficient of the cells in the same group; calculate the variance of the condition coefficient of each cell in the same group to obtain the floating condition coefficient; calculate the mean of the upper quantity coefficient or the lower quantity coefficient of each cell in the same group to obtain the same quantity coefficient; and calculate the product of the floating condition coefficient and the same quantity coefficient to obtain the modification factor; Generate a component-level strategy based on the battery translation model, the basic status data of the battery pack, and the modifying factors; It should be further explained that, in the specific implementation process, the process of generating a composition level strategy according to the battery translation model, the basic status data of the battery pack and the modification factor includes: synchronously updating the upper-level attribute label, the category label and the lower-level category label of the single battery into the battery translation model, and marking the modification factor in the battery translation model; obtaining the number of upper-level attribute labels and the number of lower-level attribute labels in the battery pack, calculating the sum of the number of upper-level attribute labels and the number of lower-level attribute labels to obtain the total number of category labels, calculating the ratio of the number of upper-level attribute labels in the battery pack to the total number of category labels to obtain the composition coefficient; setting the composition period, multiplying the composition coefficient by the composition period to obtain the horizontal reference period; when the time is at the node where the horizontal reference period is located within the composition period, performing grouping judgment on the battery translation model, setting the composition threshold, if the difference between the modification factors is greater than the composition threshold, regrouping the single battery grouping corresponding to the modification factor until the difference between the modification factors is less than or equal to the composition threshold, and generating a composition level strategy based on the dynamic adjustment of the single battery grouping.
[0017] It should be further explained that, in the specific implementation process, according to the group level strategy and the modification factor, the battery information communication channel is constructed, and according to the battery information communication channel and the basic status data of the battery pack, the battery pack is balanced and controlled, and the process of generating the group constant coefficient includes: Setting a high voltage charging circuit unit; The high-voltage charging circuit unit is arranged outside the battery pack, and the high-voltage charging circuit unit includes a plurality of high-voltage charging circuit sub-units, and the high-voltage charging circuit sub-units are connected to each single battery in the battery pack; the high-voltage charging circuit unit uses a converter to charge the battery pack; According to the component level strategy and the modification factor, an information communication channel is established between a single battery containing a modification label of the previous level and a single battery containing a modification label of the next level, and the information communication channel is connected to the high-voltage charging circuit unit, and an information communication channel is established between battery packs and connected to the high-voltage charging circuit unit, and a battery information communication channel is constructed according to the information communication channel between single batteries and the information communication channel between battery packs; Acquire basic status data of battery packs in real time, monitor the single cell current of each single cell in each battery pack, and calculate the variance of the single cell current in each battery pack to obtain the current distribution coefficient; set the current distribution coefficient threshold; when the current distribution coefficient is greater than the current distribution coefficient threshold, balance the battery pack, optimize the control of the single cells in the battery pack through adaptive control theory, and obtain the constant coefficient of the battery pack according to the average value of the state of charge value of the single cells in the battery pack; It should be further explained that, in the specific implementation process, the process of balancing control of the battery pack includes: transmitting the energy in the single battery containing the previous modification tag to the high-voltage charging circuit unit through the battery information communication channel, and transmitting the energy in the high-voltage charging circuit unit to the single battery containing the next modification tag every horizontal reference cycle, so as to balance the energy in the battery pack.
[0018] It should be further explained that, in the specific implementation process, the battery pack operation is planned and controlled according to the constant coefficient and the battery information communication channel, and the process of generating the battery pack control strategy includes: According to the constant coefficient and the drift coefficient, the battery group is planned and judged; when the constant coefficient is less than the drift coefficient, the battery group does not need to be planned, and the battery group is recorded as a battery drift group; when the constant coefficient is greater than or equal to the drift coefficient, the battery group operation is planned and controlled to generate a battery group control strategy; It should be further explained that, in the specific implementation process, the process of planning and controlling the operation of the battery pack includes: transmitting the energy in the battery pack to the high-voltage charging circuit unit through the battery information communication channel, the high-voltage charging circuit unit transmits the energy to the battery drift group, and the battery pack constant coefficient is kept equal to the drift coefficient through adaptive control theory to generate a battery pack control strategy.
[0019] like Figure 2 As shown, in another embodiment of the present invention, the present invention further discloses a balancing control system for a stacked series energy storage battery pack, including a main control center, wherein the main control center is communicatively connected to a battery data acquisition module, a battery pack analysis module, a battery pack management module, and a battery balancing control module; The battery data acquisition module is used to set a battery pack signal monitoring terminal, monitor and collect battery pack basic status data, and establish a battery translation model based on the battery pack basic status data; The battery pack analysis module is used to perform inter-group difference analysis on the battery pack according to the battery translation model and the basic state data of the battery pack, obtain the modification factor, and generate the group level strategy according to the battery translation model, the basic state data of the battery pack and the modification factor; The battery pack management module is used to construct a battery information communication channel according to the group level strategy and the modification factor, and to perform balanced control on the battery pack according to the battery information communication channel and the basic state data of the battery pack to generate a group constant coefficient; The battery balancing control module is used to plan and control the operation of the battery pack according to the battery constant coefficient and the battery information communication channel, and generate a battery pack control strategy.
[0020] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.
Claims
1. A method for balancing and controlling a stacked series energy storage battery pack, characterized in that: The following steps are involved: Step S1: Setting a battery pack signal monitoring terminal, monitoring and collecting basic status data of the battery pack, and establishing a battery translation model according to the basic status data of the battery pack; Step S2: performing inter-group difference analysis on the battery group according to the battery translation model and the basic state data of the battery group, obtaining the modification factor, and generating a group level strategy according to the battery translation model, the basic state data of the battery group and the modification factor; Step S3: constructing a battery information communication channel according to the group level strategy and the modification factor, and performing balanced control on the battery group according to the battery information communication channel and the basic state data of the battery group to generate a group constant coefficient; Step S4: According to the battery constant coefficient and the battery information communication channel, the battery pack operation is planned and controlled to generate a battery pack control strategy.
2. A method for controlling the balancing of stacked series energy storage battery packs according to claim 1, characterized in that: The process of setting up a battery pack signal monitoring terminal, monitoring and collecting basic status data of the battery pack, and establishing a battery translation model based on the basic status data of the battery pack includes: The battery pack signal monitoring terminal is used to collect basic status data of the battery pack; the battery pack signal monitoring terminal includes a plurality of single cell signal monitoring terminals; the basic status data of the battery pack includes a plurality of single cell basic status data and battery pack structure data; The single cell basic status data includes single cell basic data, single cell status data and single cell structure data; the single cell basic data includes single cell voltage, single cell current, single cell capacity, single cell internal resistance, single cell operating time and single cell self-discharge rate; the single cell status data includes state of charge value, health state value and single cell temperature; Construct each single cell region according to each single cell and the single cell basic data in the single cell, construct a group cell region according to each single cell region in the battery pack and the single cell structure data, and establish a battery translation model according to each group cell region and the battery pack structure data; A translation cycle is set, and the battery pack signal monitoring end collects the basic battery pack status data of each battery pack according to the translation cycle, and maps the basic battery pack status data to the translation model, and updates the translation model in real time.
3. A method for controlling the balancing of stacked series energy storage battery packs according to claim 2, characterized in that: According to the battery translation model and the basic status data of the battery pack, the process of analyzing the inter-group differences of the battery pack includes: According to the battery translation model and the basic status data of the battery pack, the maximum state of charge value and the minimum state of charge value of the single battery in the battery pack are obtained, and the health state value of the single battery corresponding to the maximum state of charge value and the health state value of the single battery corresponding to the minimum state of charge value are obtained. According to the maximum state of charge value of the single battery in the battery pack and the health state value corresponding to the single battery, the x state coefficient is obtained; according to the minimum state of charge value of the single battery in the battery pack and the health state value corresponding to the single battery, the y state coefficient is obtained; according to the x state coefficient and the y state coefficient, the drift coefficient is obtained; the zero drift coefficient is set; according to the zero drift coefficient and the drift coefficient, the balanced state of the single battery is judged, when the single battery in the battery pack is in a relatively unbalanced state, the modified floating coefficient is set, and the modified upper coefficient is obtained according to the x state coefficient and the modified floating coefficient; according to the y state coefficient and the modified floating coefficient, the modified lower coefficient is obtained; according to the single battery current and the single battery running time, the single battery The battery capacity value is obtained; according to the battery capacity value of each single battery, the modified upper coefficient and the modified lower coefficient, the upper coefficient and the lower coefficient are obtained, and the upper category label and the lower category label are marked respectively; the category label is marked according to the remaining independent single batteries in the battery pack; the upper category label, the category label and the lower category label are all marked for the whole group, and the grouping of the single batteries can be obtained according to the upper category label, the category label and the lower category label; according to the battery translation model and the upper category label, the category label and the lower category label in the battery pack, each single battery is numbered; the batteries in the same group of single batteries are analyzed, the condition factor is set, and the condition coefficient of the single batteries in the same group is obtained according to the single battery capacity, the single battery self-discharge rate and the condition factor of each single battery; according to the condition coefficient of each single battery in the same group, the floating condition coefficient is obtained; according to the upper quantity coefficient or the lower quantity coefficient of each single battery in the same group, the same quantity coefficient is obtained; and according to the floating condition coefficient and the same quantity coefficient, the modification factor is obtained.
4. A method for controlling the balancing of stacked series energy storage battery packs according to claim 3, characterized in that: Based on the battery translation model, battery pack basic status data and modification factors, the process of generating a component level strategy includes: The upper-level attribute label, the level-level attribute label and the lower-level attribute label of the single battery are synchronously updated to the battery translation model, and the modification factor is marked in the battery translation model; the number of upper-level attribute labels and the number of lower-level attribute labels in the battery group are obtained, and the total number of level-level attribute labels is obtained according to the number of upper-level attribute labels and the number of lower-level attribute labels, and the composition coefficient is obtained according to the number of upper-level attribute labels and the total number of level-level attribute labels in the battery group; the composition period is set, and the horizontal reference period is obtained according to the composition coefficient and the composition period; when the time is at the node where the horizontal reference period is located within the composition period, the battery translation model is grouped and judged, the composition threshold is set, and the composition level strategy is generated according to the modification factor and the composition threshold.
5. A method for controlling the balancing of stacked series energy storage battery packs according to claim 4, characterized in that: According to the component level strategy and modification factors, the process of building a battery information communication channel includes: A high-voltage charging circuit unit is set up; according to the group level strategy and the modification factor, an information communication channel is established between a single battery containing a previous modification label and a single battery containing a next modification label, and an information communication channel is established between battery groups, and a battery information communication channel is constructed according to the information communication channel between single batteries, the information communication channel between battery groups and the high-voltage charging circuit unit.
6. A method for controlling the balancing of stacked series energy storage battery packs according to claim 5, characterized in that: According to the battery information communication channel and the basic status data of the battery pack, the process of balancing the battery pack includes: Acquire basic status data of battery packs in real time, monitor the single cell current of each single cell in each battery pack, and obtain the current distribution coefficient according to the single cell current in each battery pack; set the current distribution coefficient threshold; obtain the battery pack constant coefficient according to the current distribution coefficient, the current distribution coefficient threshold and the state of charge value of the single cell in the battery pack.
7. A method for controlling the balancing of stacked series energy storage battery packs according to claim 6, characterized in that: According to the constant coefficient of the battery pack and the battery information communication channel, the operation of the battery pack is planned and controlled, and the process of generating the battery pack control strategy includes: The battery group is planned and judged according to the group constant coefficient and the drift coefficient; when the group constant coefficient is less than the drift coefficient, the battery group does not need to be planned, and the battery group is recorded as a battery drift group; when the group constant coefficient is greater than or equal to the drift coefficient, the battery group operation is planned and controlled to generate a battery group control strategy.
8. A balancing control system for a stacked series energy storage battery pack, specifically applied to a balancing control method for a stacked series energy storage battery pack according to any one of claims 1 to 7, comprising a main control center, characterized in that: The main control center is communicatively connected to a battery data acquisition module, a battery pack analysis module, a battery pack management module and a battery balancing control module; The battery data acquisition module is used to set a battery pack signal monitoring terminal, monitor and collect battery pack basic status data, and establish a battery translation model based on the battery pack basic status data; The battery pack analysis module is used to perform inter-group difference analysis on the battery pack according to the battery translation model and the basic state data of the battery pack, obtain the modification factor, and generate the group level strategy according to the battery translation model, the basic state data of the battery pack and the modification factor; The battery pack management module is used to construct a battery information communication channel according to the group level strategy and the modification factor, and to perform balanced control on the battery pack according to the battery information communication channel and the basic state data of the battery pack to generate a group constant coefficient; The battery balancing control module is used to plan and control the operation of the battery pack according to the battery constant coefficient and the battery information communication channel, and generate a battery pack control strategy.