Charging control method and device for lithium ion battery

Abstract

The invention discloses a charging control method and device for a lithium ion battery, and belongs to the technical field of lithium ion battery charging. The method comprises the following steps: obtaining performance characterization parameters of the lithium ion battery, analyzing the performance characterization parameters to obtain pre-charging execution condition information of the lithium ion battery, pre-charging the lithium ion battery, monitoring pre-charging performance data of the lithium ion battery, determining initial-order capacity-grading recharging parameters of the lithium ion battery based on the pre-charging performance data, and determining the initial-order capacity-grading recharging parameters of the lithium ion battery based on the initial-order capacity-grading recharging parameters of the lithium ion battery. And carrying out capacity-grading recharge control on the lithium ion battery according to the first-order capacity-grading recharge parameter, monitoring the process of capacity-grading recharge control in real time, and obtaining a real-time monitoring result for adjustment control management. According to the method, the lithium ion battery is pre-charged through the pre-charging execution condition information, and the capacity-grading recharging control is performed on the lithium ion battery according to the first-order capacity-grading recharging parameter, so that the accurate and effective charging control on the lithium ion battery is achieved, and the problem that the charging control on the lithium ion battery cannot be accurately and effectively performed in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium ion battery charging, and in particular to a charging control method and device for lithium ion batteries. Background Art

[0002] With the popularity of lithium-ion batteries in various applications, the requirements for charging control technology are getting higher and higher. How to improve charging efficiency, extend battery life and ensure battery safety has become the focus of current research and development. By continuously optimizing the charging control method, the performance of lithium-ion batteries can be effectively improved while ensuring the safety of users. Therefore, charging control technology has important theoretical significance and practical value in the application of lithium-ion batteries.

[0003] For example, the patent application with the publication number CN117175040A discloses a digital optimization method for lithium-ion battery fast charging without lithium precipitation, which includes: building a high-precision simulation model of lithium-ion batteries based on an electrode equivalent circuit model through a high-precision simulation module of lithium-ion batteries, an internal state estimation module online estimating the internal state of the lithium-ion battery anode potential, and setting the safe and fast charging area of ​​the lithium-ion battery using a safe charging area setting module. And an optimal charging current calculation module is used to set the current control scheme and calculate the optimal charging current at the next moment.

[0004] For example, the invention patent with announcement number: CN105932349B announces a long-life fast charging method for lithium-ion batteries, including: establishing an improved single-particle model for the lithium-ion battery; obtaining the mechanism parameters of the battery in the improved single-particle model by using the method of excitation response analysis; obtaining the surface lithium insertion rate of the negative electrode active material of the battery according to the mechanism parameters of the battery; comparing the relationship between the surface lithium insertion rate of the negative electrode active material and a set threshold value, and controlling the battery charging current and charging time according to the relationship to achieve fast charging of the lithium-ion battery.

[0005] However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the present application found that the above technology has at least the following technical problems:

[0006] In the prior art, a high-precision simulation module is used to estimate the internal state of a lithium-ion battery, set a safe and fast charging area for the lithium-ion battery, and calculate the optimal charging current. However, due to the aging of lithium-ion batteries during actual use and the influence of various external factors, the actual battery performance is often not well adapted and managed during the actual charging process. Therefore, the prior art has the problem of being unable to accurately and effectively control the charging of lithium-ion batteries. Summary of the invention

[0007] The embodiments of the present application provide a charging control method and device for a lithium-ion battery, thereby solving the problem in the prior art that the charging control of the lithium-ion battery cannot be performed accurately and effectively, and realizing accurate and effective charging control of the lithium-ion battery.

[0008] The embodiment of the present application provides a charging control method for a lithium-ion battery, comprising the following steps: a pre-charge controller senses a charging trigger signal of the lithium-ion battery, and starts a battery performance sensor to retrieve a performance characterization parameter of the lithium-ion battery for processing to obtain a performance characterization coefficient of the lithium-ion battery; based on the performance characterization coefficient of the lithium-ion battery, analyzes and obtains pre-charge execution condition information of the lithium-ion battery, activates a power storage controller to perform pre-charge processing on the lithium-ion battery with the pre-charge execution condition information, and simultaneously monitors pre-charge performance data of the lithium-ion battery; based on the pre-charge performance data of the lithium-ion battery, processes to determine a primary-order capacity-divided continuous charging parameter of the lithium-ion battery, and controls the lithium-ion battery with the primary-order capacity-divided continuous charging parameter through the power storage controller; and monitors the process of the capacity-divided continuous charging control of the lithium-ion battery in real time, obtains the real-time monitoring result, and performs corresponding adjustment control management.

[0009] Furthermore, the starting battery performance sensor retrieves the performance characterization parameters of the lithium-ion battery for processing. The specific process is: the starting battery performance sensor obtains the performance characterization parameters of the lithium-ion battery, and processes them in combination with a preset lithium-ion battery performance characterization parameter control set to obtain a performance characterization coefficient of the lithium-ion battery; the performance characterization parameters of the lithium-ion battery include: battery open circuit voltage, battery initial internal resistance, battery current full load capacity, battery rated capacity and battery historical average operating temperature; the performance characterization coefficient of the lithium-ion battery is used to characterize the current basic performance of the lithium-ion battery.

[0010] Furthermore, the specific method for obtaining the performance characterization coefficient of the lithium-ion battery is:

[0011]

[0012] Wherein, α represents the performance characterization coefficient of the lithium-ion battery, U represents the open circuit voltage of the battery, U′ represents the preset open circuit voltage reference value of the battery, R represents the initial internal resistance of the battery, R′ represents the preset initial internal resistance reference value of the battery, Q represents the current full load capacity of the battery, Q′ represents the rated capacity of the battery, T represents the historical average operating temperature of the battery, T′ represents the preset historical average operating temperature reference value of the battery, and e is a natural constant.

[0013] Furthermore, the analysis obtains the pre-charge execution condition information of the lithium-ion battery, and the specific process is: obtaining the performance characterization coefficient of the lithium-ion battery, matching the performance characterization coefficient of the lithium-ion battery with the pre-charge execution condition information corresponding to each preset performance characterization coefficient interval, and obtaining the pre-charge execution condition information corresponding to the interval in which the performance characterization coefficient of the lithium-ion battery is located, which is recorded as the pre-charge execution condition information of the lithium-ion battery; the pre-charge execution condition information of the lithium-ion battery specifically includes: pre-charge current and preset charging time.

[0014] Furthermore, the processing is performed based on the pre-charge performance data of the lithium-ion battery, and the specific process is: pre-charging the lithium-ion battery with the pre-charge execution condition information, obtaining the pre-charge performance data of the lithium-ion battery, and analyzing the pre-charge performance data of the lithium-ion battery to obtain the pre-charge performance value of the lithium-ion battery; the pre-charge performance value of the lithium-ion battery is used to characterize the pre-charge health status of the lithium-ion battery; the pre-charge performance data of the lithium-ion battery includes: pre-charge execution time, battery voltage rise rate, battery current rise rate and battery temperature rise rate.

[0015] Further, the initial capacity-divided continuous charging parameters of the lithium-ion battery are determined in the following specific processes: obtaining a pre-charge performance value of the lithium-ion battery, obtaining a preset pre-charge performance threshold, comparing the pre-charge performance value of the lithium-ion battery with the pre-charge performance threshold, and when the pre-charge performance value of the lithium-ion battery is greater than or equal to the pre-charge performance threshold, performing capacity-divided continuous charging on the lithium-ion battery with the default initial capacity-divided continuous charging parameters; when the pre-charge performance value of the lithium-ion battery is less than the pre-charge performance threshold, extracting the difference between the pre-charge performance value of the lithium-ion battery and the pre-charge performance threshold, recording it as the capacity-divided continuous charging adjustment value, and comparing the capacity-divided continuous charging adjustment value of the lithium-ion battery with each preset value in the database. The initial-order divided-capacity continuing charging parameter adjustment values ​​corresponding to the divided-capacity continuing charging adjustment value interval are matched to obtain the initial-order divided-capacity continuing charging parameter adjustment values ​​corresponding to the divided-capacity continuing charging adjustment value interval of the lithium-ion battery, which are recorded as the initial-order divided-capacity continuing charging parameter adjustment values ​​of the lithium-ion battery; the default initial-order divided-capacity continuing charging parameters are added to the initial-order divided-capacity continuing charging parameter adjustment values ​​of the lithium-ion battery to obtain the initial-order divided-capacity continuing charging parameters of the lithium-ion battery, the default initial-order divided-capacity continuing charging parameters are the default fast charging cutoff capacity value and the default constant-voltage charging cutoff capacity value, and the initial-order divided-capacity continuing charging parameter adjustment values ​​include the fast charging cutoff capacity adjustment value and the constant-voltage charging cutoff capacity adjustment value.

[0016] Furthermore, the real-time monitoring result is obtained and corresponding adjustment, control and management are carried out. The specific process is: obtaining environmental impact parameters and charging characteristic data of the lithium-ion battery during the divided capacity and continued charging process of the lithium-ion battery, determining the real-time divided capacity and continued charging stage of the lithium-ion battery, and obtaining a reference set of the real-time divided capacity and continued charging stage of the lithium-ion battery; combining the environmental impact parameters, the charging characteristic data of the lithium-ion battery during the divided capacity and continued charging process of the lithium-ion battery and the reference set of the real-time divided capacity and continued charging stage of the lithium-ion battery to obtain the charging characteristic value of the lithium-ion battery; the environmental impact parameters include: ambient temperature, ambient humidity and ambient atmospheric pressure; the charging characteristic data of the lithium-ion battery include: battery real-time voltage, battery real-time current, battery internal resistance and battery real-time temperature; based on the continued charging characteristic value of the lithium-ion battery, the real-time monitoring result is processed and corresponding adjustment, control and management are carried out; the real-time monitoring result is real-time monitoring steady state or real-time monitoring abnormality.

[0017] Furthermore, the processing obtains real-time monitoring results, and the specific process is: obtaining a recharge characteristic value of the lithium-ion battery, obtaining a preset recharge characteristic threshold, comparing the recharge characteristic value of the lithium-ion battery with the recharge characteristic threshold, when the recharge characteristic value of the lithium-ion battery is greater than or equal to the recharge characteristic threshold, the real-time monitoring result of the real-time capacity division and recharge stage of the lithium-ion battery is a real-time monitoring steady state, when the recharge characteristic value of the lithium-ion battery is less than the recharge characteristic threshold, the real-time monitoring result of the real-time capacity division and recharge stage of the lithium-ion battery is a real-time monitoring abnormality.

[0018] Furthermore, the corresponding regulation and control management is specifically carried out as follows: when the real-time monitoring result of the real-time capacity-divided and continued charging stage of the lithium-ion battery is a real-time monitoring steady state, no regulation operation is performed, and the lithium-ion battery continues to be charged with the current continued charging current; when the real-time monitoring result of the real-time capacity-divided and continued charging stage of the lithium-ion battery is a real-time monitoring abnormality, the difference between the continued charging characteristic value of the lithium-ion battery and the continued charging characteristic threshold is extracted, recorded as the continued charging current adjustment value, and the continued charging current adjustment value is matched with the continued charging current reduction value corresponding to each continued charging current adjustment value interval preset in the database to obtain the continued charging current reduction value corresponding to the interval in which the continued charging current adjustment value is located, recorded as the continued charging current reduction value of the lithium-ion battery; the continued charging current of the lithium-ion battery is subtracted from the continued charging current reduction value of the lithium-ion battery from the real-time continued charging current to obtain the continued charging current of the lithium-ion battery, and regulation and control are performed.

[0019] The embodiment of the present application provides a charging control device for a lithium-ion battery, including a battery performance acquisition module, a pre-charging module, a divided capacity continuous charging module and an adjustment module: a battery performance analysis module: used for the pre-charging controller to sense the charging trigger signal of the lithium-ion battery, and start the battery performance sensor to retrieve the performance characterization parameters of the lithium-ion battery for processing, so as to obtain the performance characterization coefficient of the lithium-ion battery; the pre-charging module: used for analyzing and obtaining the pre-charging execution condition information of the lithium-ion battery based on the performance characterization coefficient of the lithium-ion battery, and activating the power storage controller to pre-charge the lithium-ion battery with the pre-charging execution condition information, and synchronously monitoring the pre-charging performance data of the lithium-ion battery; the divided capacity continuous charging module: used for processing based on the pre-charging performance data of the lithium-ion battery, determining the initial divided capacity continuous charging parameters of the lithium-ion battery, and controlling the divided capacity continuous charging of the lithium-ion battery through the power storage controller with the initial divided capacity continuous charging parameters; and the adjustment module: used for real-time monitoring of the process of divided capacity continuous charging control of the lithium-ion battery, obtaining the real-time monitoring results and performing corresponding adjustment control management.

[0020] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0021] 1. This embodiment obtains and analyzes the performance characterization coefficient of the lithium-ion battery to obtain the pre-charge execution condition information of the lithium-ion battery, and pre-charges the battery based on the pre-charge execution condition information, thereby effectively ensuring the rationality of the pre-charge execution condition of the lithium-ion battery and reducing the damage to the lithium-ion battery caused by unreasonable pre-charge execution. The pre-charge performance data is monitored for analysis to determine the initial stage capacity division and continuous charging parameters, and the initial stage capacity division and continuous charging parameters of the lithium-ion battery can be accurately and effectively adjusted in time according to the pre-charge situation of the lithium-ion battery, thereby improving the charging efficiency of the lithium-ion battery. The process of capacity division and continuous charging control is then monitored in real time and corresponding adjustment, control and management are performed, and the charging situation of the lithium-ion battery can be adjusted in time and accurately, thereby reducing the damage to the lithium-ion battery and increasing the life of the lithium-ion battery.

[0022] 2. The pre-charge performance value is obtained by acquiring the pre-charge performance data of the lithium-ion battery, and the initial capacity division and continuous charging parameters of the lithium-ion battery are determined and adjusted according to the pre-charge performance value of the lithium-ion. The initial capacity division and continuous charging parameters are effectively adjusted according to the situation of the lithium-ion battery, which adapts to the capacity division and continuous charging needs of the lithium-ion battery in different situations, reduces the performance degradation or safety problems caused by improper charging strategies, and improves the stability and safety of lithium-ion battery charging.

[0023] 3. By obtaining the environmental impact parameters and charging characteristic data of lithium-ion batteries during the process of lithium-ion battery capacity division and charging, and combining the control set of the stage of lithium-ion battery capacity division and charging to analyze and perform corresponding adjustment management, it is possible to perform refined analysis according to the different charging stages of lithium-ion batteries, improve the stability and safety of lithium-ion batteries during charging, accurately monitor the battery status and adjust the charging current according to the charging characteristic value, avoid overcharging or overheating, reduce battery aging, and increase the battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A flow chart of a charging control method for a lithium-ion battery provided in an embodiment of the present application;

[0025] Figure 2 A structural diagram of a charging control device for a lithium-ion battery provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] The embodiment of the present application solves the problem that the charging control of lithium-ion batteries cannot be accurately and effectively performed in the prior art by providing a charging control method and device for lithium-ion batteries. The pre-charging execution condition information of the lithium-ion battery is obtained by acquiring and analyzing the performance characterization coefficient of the lithium-ion battery, and pre-charging is performed based on the pre-charging execution condition information, thereby effectively ensuring the rationality of the pre-charging execution condition of the lithium-ion battery, reducing the damage to the lithium-ion battery caused by unreasonable pre-charging execution, and monitoring the pre-charging performance data for analysis to determine the initial stage capacity division and continuous charging parameters. The initial stage capacity division and continuous charging parameters of the lithium-ion battery can be accurately and effectively adjusted in time according to the pre-charging situation of the lithium-ion battery, thereby improving the charging efficiency of the lithium-ion battery. The process of capacity division and continuous charging control is then monitored in real time and corresponding adjustment control management is performed, thereby timely and accurately adjusting the charging situation of the lithium-ion battery, thereby reducing the damage to the lithium-ion battery and improving the life of the lithium-ion battery.

[0027] The technical solution in the embodiment of the present application is to solve the above-mentioned problem that the charging control of lithium-ion batteries cannot be performed accurately and effectively. The overall idea is as follows:

[0028] By sensing the charging trigger signal of the lithium-ion battery and retrieving the performance characterization parameters of the lithium-ion battery for processing, the performance characterization coefficient of the lithium-ion battery is obtained; based on the performance characterization coefficient of the lithium-ion battery, the pre-charge execution condition information of the lithium-ion battery is analyzed, and the lithium-ion battery is pre-charged with the pre-charge execution condition information, and the pre-charge performance data of the lithium-ion battery is monitored simultaneously; based on the pre-charge performance data of the lithium-ion battery, the initial capacity-dividing and continuous charging parameters of the lithium-ion battery are processed, and the lithium-ion battery is controlled by the initial capacity-dividing and continuous charging parameters through the power storage controller; the process of the lithium-ion battery capacity-dividing and continuous charging control is monitored in real time, and the real-time monitoring results are obtained to perform corresponding adjustment control management, so as to achieve accurate and timely charging control of the lithium-ion battery.

[0029] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] like Figure 1 As shown, it is a flow chart of a charging control method for a lithium-ion battery provided by an embodiment of the present application. The method is applied to a charging control device for a lithium-ion battery. The method includes the following steps: a pre-charge controller senses a charging trigger signal of the lithium-ion battery, and starts a battery performance sensor to retrieve a performance characterization parameter of the lithium-ion battery for processing to obtain a performance characterization coefficient of the lithium-ion battery; based on the performance characterization coefficient of the lithium-ion battery, pre-charge execution condition information of the lithium-ion battery is analyzed and obtained, and the storage controller is activated to pre-charge the lithium-ion battery with the pre-charge execution condition information, and the pre-charge performance data of the lithium-ion battery is simultaneously monitored; based on the pre-charge performance data of the lithium-ion battery, the initial stage capacity division and continuous charging parameters of the lithium-ion battery are processed, and the capacity division and continuous charging control of the lithium-ion battery is performed by the storage controller with the initial stage capacity division and continuous charging parameters; the process of the capacity division and continuous charging control of the lithium-ion battery is monitored in real time, and the real-time monitoring result is obtained for corresponding adjustment, control and management.

[0031] In this embodiment, the pre-charge controller is used to sense the charging trigger signal of the lithium-ion battery and pre-charge the lithium-ion battery. When the lithium-ion battery reaches the preset storage trigger remaining capacity value, the charging signal is automatically triggered, and the battery performance sensor is used to obtain the performance characterization parameters of the lithium-ion battery. The storage controller is a device for charging lithium-ion batteries. When the lithium-ion battery is at a low voltage, a low-current, low-voltage charging process is first performed to restore the normal working state of the battery, that is, the lithium-ion battery is pre-charged. The lithium-ion capacity-divided continuous charging is controlled to ensure that the battery obtains reasonable power distribution and continuous charging control at different charging stages, thereby extending the battery life and improving the charging efficiency.

[0032] Furthermore, the battery performance sensor is started to retrieve the performance characterization parameters of the lithium-ion battery for processing. The specific process is: the battery performance sensor is started to obtain the performance characterization parameters of the lithium-ion battery, and the performance characterization parameters are processed in combination with a preset lithium-ion battery performance characterization parameter control set to obtain a performance characterization coefficient of the lithium-ion battery; the performance characterization parameters of the lithium-ion battery include: battery open circuit voltage, battery initial internal resistance, battery current full load capacity, battery rated capacity and battery historical average operating temperature; the performance characterization coefficient of the lithium-ion battery is used to characterize the current basic performance of the lithium-ion battery.

[0033] The battery open circuit voltage is the voltage across the battery when the battery is not connected to any load (i.e., no current flows). The battery initial internal resistance is the resistance to current flow inside the battery. The battery current full load capacity is the maximum electrical energy that can be stored in the current state of the battery. The battery historical average operating temperature is the average temperature of the battery during its historical operation (i.e., the charging process and the discharging process). The battery open circuit voltage is obtained through a multimeter, the battery initial internal resistance is obtained through an AC impedance spectrum test, and the battery current full load capacity is obtained through an existing battery management system. The battery management system is a system for monitoring and managing rechargeable batteries. The battery management systems mentioned below are all this battery management system. The battery historical average operating temperature is obtained through a temperature sensor and the historical operating temperature of the lithium-ion battery is counted and then averaged. The battery open circuit voltage reference value, battery initial internal resistance reference value, battery rated capacity reference value, and battery historical average operating temperature reference value are obtained from the database.

[0034] Furthermore, the specific method for obtaining the performance characterization coefficient of the lithium-ion battery is:

[0035]

[0036] Wherein, α represents the performance characterization coefficient of the lithium-ion battery, U represents the open circuit voltage of the battery, U′ represents the preset open circuit voltage reference value of the battery, R represents the initial internal resistance of the battery, R′ represents the preset initial internal resistance reference value of the battery, Q represents the current full load capacity of the battery, Q′ represents the rated capacity of the battery, T represents the historical average operating temperature of the battery, T′ represents the preset historical average operating temperature reference value of the battery, and e is a natural constant.

[0037] In this embodiment, the battery open circuit voltage reflects the electrochemical state of the battery. The open circuit voltage is usually closely related to the state of charge of the battery, reflecting the basic condition of the battery open circuit voltage. The initial internal resistance of the battery directly affects the battery performance. The current full load capacity of the battery directly determines the battery's endurance. The historical average operating temperature of the battery has an important impact on its performance and life. Temperature is a key factor affecting the health and performance of lithium-ion batteries. The battery open circuit voltage, the initial internal resistance of the battery, the current full load capacity of the battery and the historical average operating temperature of the battery can characterize the basic performance of lithium-ion batteries to a certain extent. The battery open circuit voltage, the initial internal resistance of the battery, the current full load capacity of the battery and the historical average operating temperature of the battery are also closely related. The battery open circuit voltage reflects the current state of the battery and is associated with the initial internal resistance of the battery, the current full load capacity of the battery and the historical average operating temperature of the battery. The open circuit voltage of a lithium-ion battery changes with its state of charge. The battery open circuit voltage can provide some estimates of the remaining capacity of the battery. A higher battery open circuit voltage means a higher remaining capacity of the battery. The battery open circuit voltage is affected by the internal resistance. High internal resistance usually means that the battery is in poor condition. The battery open circuit voltage may be affected. The battery open circuit voltage is also affected by the historical average operating temperature. At low temperatures, the chemical reaction rate of the battery slows down, resulting in a decrease in the open circuit voltage, while at high temperatures, the open circuit voltage may increase slightly, but too high a temperature may also accelerate the aging of the battery. Batteries with lower initial internal resistance usually have higher maximum capacities. When lithium-ion batteries are operated at high temperatures for a long time, the chemical reaction rate of the battery is accelerated, and the electrolyte and other materials in the battery may degrade, which may cause the maximum capacity of the lithium-ion battery to decrease. Too high or too low a temperature will accelerate the aging process of the battery, thereby affecting the initial internal resistance of the lithium-ion battery and the current full load capacity of the battery.

[0038] Further, the pre-charge execution condition information of the lithium-ion battery is obtained by analysis. The specific process is: obtaining the performance characterization coefficient of the lithium-ion battery, matching the performance characterization coefficient of the lithium-ion battery with the pre-charge execution condition information corresponding to each preset performance characterization coefficient interval, and obtaining the pre-charge execution condition information corresponding to the interval in which the performance characterization coefficient of the lithium-ion battery is located, which is recorded as the pre-charge execution condition information of the lithium-ion battery; the pre-charge execution condition information of the lithium-ion battery specifically includes: pre-charge current and preset charging time.

[0039] In this embodiment, the pre-charge execution condition information of the lithium-ion battery is obtained according to the performance characterization coefficient of the lithium-ion battery, that is, the pre-charge current and the preset charging time of the lithium-ion battery are obtained, and then the lithium-ion battery is charged with the obtained pre-charge current, and the preset charging time is used as a standard data for judging the pre-charge performance.

[0040] Furthermore, processing is performed based on the pre-charge performance data of the lithium-ion battery, and the specific process is: pre-charge the lithium-ion battery according to the pre-charge execution condition information, obtain the pre-charge performance data of the lithium-ion battery, and analyze the pre-charge performance data of the lithium-ion battery to obtain the pre-charge performance value of the lithium-ion battery; the pre-charge performance value of the lithium-ion battery is used to characterize the pre-charge health status of the lithium-ion battery; the pre-charge performance data of the lithium-ion battery includes: pre-charge execution time, battery voltage rise rate, battery current rise rate and battery temperature rise rate.

[0041] In this embodiment, the specific method for obtaining the pre-charge performance value of the lithium-ion battery is as follows:

[0042]

[0043] In the formula, ε represents the pre-charge performance value of the lithium-ion battery, T S Represents the precharge execution time, T S ′ represents the preset charging time, U S Represents the battery voltage rising rate, U S ′ represents the preset battery voltage rising rate reference value, I S Represents the battery current rising rate, I S ′ represents the preset battery current rising rate reference value, F S Represents the battery heating rate, F S ′ represents the preset battery temperature rise rate reference value, and e is a natural constant.

[0044] In this embodiment, the pre-charge execution time is the time consumed by the lithium-ion battery for pre-charging, the battery voltage rise rate is the voltage rise rate of the lithium-ion battery during the pre-charge time, the battery current rise rate is the current rise rate of the lithium-ion battery during the pre-charge time, and the battery temperature rise rate is the temperature rise rate of the lithium-ion battery during the pre-charge time. The pre-charge execution time is directly obtained by timing, the battery voltage rise rate is obtained through the battery management system, the battery current rise rate is obtained through the battery management system, and the battery temperature rise rate is obtained through the battery management system. The pre-charge execution time reference value, the battery voltage rise rate reference value, the battery current rise rate reference value, and the battery temperature rise rate reference value are obtained from the database.

[0045] In this embodiment, the pre-charge execution time, the battery voltage rise rate, the battery current rise rate and the battery temperature rise rate all represent the pre-charge health state of the lithium-ion battery. The abnormal pre-charge time may be a signal of battery aging or internal damage. Under normal circumstances, the battery voltage should rise at a steady rate during the pre-charge process. If the voltage rise rate is too fast, it may indicate that the electrochemical performance of the battery has declined. If the voltage rises too slowly, it usually indicates that the battery has a high internal resistance or some cells have decayed. If the battery voltage rise rate is too fast or too slow, it indicates that the battery may be in an unhealthy state. If the battery current rise rate is abnormal, it may mean that there is an abnormality inside the battery. If the temperature rise rate is abnormal, it may be a sign of battery aging, damage or abnormal state. The pre-charge execution time, the battery voltage rise rate, the battery current rise rate and the battery temperature rise rate are all important indicators that represent the pre-charge health state of the lithium-ion battery.

[0046] In this embodiment, the pre-charge execution time, the battery voltage rise rate, the battery current rise rate and the battery temperature rise rate are interrelated and affect each other. The battery voltage rise rate is directly related to the pre-charge execution time. When the pre-charge time is longer, the battery voltage rise rate is slower. On the contrary, if the pre-charge time is short, the battery voltage rises faster, but it may bring the risk of overheating or battery damage. Too fast a current rise will cause the battery voltage to rise rapidly, which will cause the battery current rise rate to increase, and may also cause the internal heat of the battery to increase, thereby affecting the battery temperature rise rate. The battery current rise rate and voltage rise rate are often interrelated. A higher charging current tends to accelerate the rise of voltage. When the battery voltage rise rate is faster, the internal chemical reaction of the battery is accelerated, which may also cause more heat to be generated. The faster the battery current rise rate, the more heat is generated by the internal resistance of the battery, and the more significant the increase in battery temperature. Longer pre-charge times usually charge at lower currents, which will cause the battery to heat up more slowly and reduce the rate of temperature rise.

[0047] Further, the initial capacity-divided continuous charging parameters of the lithium-ion battery are determined, and the specific process is: obtaining the pre-charge performance value of the lithium-ion battery, obtaining a preset pre-charge performance threshold, comparing the pre-charge performance value of the lithium-ion battery with the pre-charge performance threshold, and when the pre-charge performance value of the lithium-ion battery is greater than or equal to the pre-charge performance threshold, performing capacity-divided continuous charging on the lithium-ion battery with the default initial capacity-divided continuous charging parameters; when the pre-charge performance value of the lithium-ion battery is less than the pre-charge performance threshold, extracting the difference between the pre-charge performance value of the lithium-ion battery and the pre-charge performance threshold, recording it as the capacity-divided continuous charging adjustment value, and comparing the capacity-divided continuous charging adjustment value of the lithium-ion battery with the pre-charge performance threshold preset in the database. The initial-order divided-capacity continuing-charging parameter adjustment values ​​corresponding to each divided-capacity continuing-charging adjustment value interval are matched to obtain the initial-order divided-capacity continuing-charging parameter adjustment values ​​corresponding to the divided-capacity continuing-charging adjustment value interval of the lithium-ion battery, which are recorded as the initial-order divided-capacity continuing-charging parameter adjustment values ​​of the lithium-ion battery; the default initial-order divided-capacity continuing-charging parameter is added to the initial-order divided-capacity continuing-charging parameter adjustment value of the lithium-ion battery to obtain the initial-order divided-capacity continuing-charging parameter of the lithium-ion battery, the default initial-order divided-capacity continuing-charging parameter is the default fast charging cutoff capacity value and the default constant-voltage charging cutoff capacity value, and the initial-order divided-capacity continuing-charging parameter adjustment values ​​include the fast charging cutoff capacity adjustment value and the constant-voltage charging cutoff capacity adjustment value.

[0048] In this embodiment, the default initial stage capacity-divided charging parameters are the default fast charging cut-off capacity value and the default constant voltage charging cut-off capacity value, which can be directly obtained from the data. The capacity-divided charging of lithium-ion batteries is divided into three stages, the first stage is the fast charging stage, the second stage is the constant voltage charging stage, and the third stage is the trickle charging stage. The initial stage capacity-divided charging parameter is the cut-off capacity parameter for the lithium-ion battery to be charged in stages. The initial stage capacity-divided charging parameter is used as the node value for switching the capacity-divided charging stage of the lithium-ion battery. When the capacity of the lithium-ion battery reaches the fast charging cut-off capacity value, the constant voltage charging stage can be switched. When the capacity of the lithium-ion battery reaches the constant voltage charging cut-off capacity value, it indicates that the lithium-ion battery is about to complete charging, and then enters the trickle charging stage until it is fully charged. In addition, the capacity of the lithium-ion battery can be obtained through the battery management system. It should be noted that when the pre-charge performance value of the lithium-ion battery is less than the pre-charge performance threshold, the pre-charge health state of the lithium-ion battery is unstable, and the cut-off capacity parameter of the lithium-ion battery staged charging needs to be reduced. Therefore, the adjustment value of the initial stage capacity-divided charging parameter of the lithium-ion battery is a negative value. When the default primary capacity-dividing charging parameter is added to the primary capacity-dividing charging parameter adjustment value of the lithium-ion battery, the default fast charging cutoff capacity value is added to the fast charging cutoff capacity adjustment value, and the default constant voltage charging cutoff capacity value is added to the constant voltage charging cutoff capacity adjustment value.

[0049] Furthermore, the real-time monitoring results are obtained to carry out corresponding regulation, control and management, and the specific process is: obtaining the environmental impact parameters and the charging characteristic data of the lithium-ion battery during the divided capacity and continued charging process of the lithium-ion battery, determining the real-time divided capacity and continued charging stage of the lithium-ion battery, and obtaining the reference set of the real-time divided capacity and continued charging stage of the lithium-ion battery; combining the environmental impact parameters, the charging characteristic data of the lithium-ion battery during the divided capacity and continued charging process of the lithium-ion battery, and the reference set of the real-time divided capacity and continued charging stage of the lithium-ion battery to obtain the charging characteristic value of the lithium-ion battery; the environmental impact parameters include: ambient temperature, ambient humidity and ambient atmospheric pressure; the charging characteristic data of the lithium-ion battery include: battery real-time voltage, battery real-time current, battery internal resistance and battery real-time temperature; based on the continued charging characteristic value of the lithium-ion battery, the real-time monitoring results are processed and corresponding regulation, control and management are carried out; the real-time monitoring result is real-time monitoring steady state or real-time monitoring abnormality.

[0050] In this embodiment, it should be noted that the lithium-ion battery capacity-divided continuous charging stage is divided into a fast charging stage, a constant voltage charging stage and a trickle charging stage, and the control sets of the continuous charging characteristic data of the fast charging stage, the constant voltage charging stage and the trickle charging stage are different. The stage of the lithium-ion battery capacity-divided continuous charging is first determined, and then the control set of the continuous charging characteristic data of this stage is obtained from the database. The control set of the stage of the lithium-ion battery capacity-divided continuous charging includes: a fast continuous charging characteristic data control set of the fast charging stage, a constant voltage continuous charging characteristic data control set of the constant voltage charging stage and a trickle continuous charging characteristic data control set of the trickle charging stage, wherein the control set includes: a battery real-time voltage control value, a battery real-time current control value, a battery internal resistance control value, a battery real-time temperature control value, an ambient temperature control value, an ambient humidity control value and an ambient atmospheric pressure control value. The fast charging stage is to charge the lithium-ion battery according to the constant continuous charging current preset in the database, the constant voltage charging stage is to charge the lithium-ion battery according to the preset constant voltage, and the trickle charging stage is to charge the battery in a small amount with a very low current to ensure that the battery is fully charged.

[0051] In the present embodiment, the specific process of determining the stage of the lithium-ion battery's divided capacity continuous charging is: real-time monitoring of the lithium-ion battery's divided capacity continuous charging process, obtaining the real-time capacity value of the lithium-ion battery, comparing the real-time capacity value of the lithium-ion battery with the initial divided capacity continuous charging parameter, when the real-time capacity value of the lithium-ion battery is less than the fast charging cutoff capacity value, the lithium-ion battery is in the fast charging stage, when the real-time capacity value of the lithium-ion battery is greater than or equal to the fast charging cutoff capacity value and less than the constant voltage charging cutoff capacity value, the lithium-ion battery is in the constant voltage charging stage, and when the real-time capacity value of the lithium-ion battery is greater than or equal to the constant voltage charging cutoff capacity value, the lithium-ion battery is in the trickle charging stage.

[0052] In this embodiment, the specific method for obtaining the continuous charging characteristic value of the lithium-ion battery is:

[0053]

[0054] In the formula, θ represents the continuous charging characteristic value of the lithium-ion battery, V T Represents the real-time battery voltage, V T ′ represents the preset real-time battery voltage reference value, I T Represents the real-time battery current, I T ′ represents the preset real-time battery current comparison value, R S Represents the internal resistance of the battery, R S ′ represents the preset battery internal resistance reference value, F T Represents the real-time temperature of the battery, F T ′ represents the preset battery real-time temperature control value, W T Represents the ambient temperature, W T ′ represents the preset ambient temperature control value, H T Represents the ambient humidity, H T ′ represents the preset ambient humidity control value, P T represents the ambient atmospheric pressure, P T ' represents the preset ambient atmospheric pressure control value, and e is a natural constant.

[0055] In this embodiment, the ambient temperature is the temperature of the environment where the battery is located, the ambient humidity is the content of water vapor in the air, and the ambient atmospheric pressure is the atmospheric pressure in the environment where the battery is located. The ambient temperature can be obtained by a temperature sensor, the ambient humidity can be obtained by monitoring the humidity of the environment through a relative humidity sensor, and the ambient atmospheric pressure can be obtained using a pressure sensor. The real-time voltage of the battery is obtained through the battery management system, the real-time current of the battery is obtained through a current sensor, the internal resistance of the battery refers to the resistance of the battery to the flow of current, which is obtained through the battery management system, and the real-time temperature of the battery refers to the temperature of the battery body, which is obtained through a temperature sensor. The real-time voltage control value of the battery, the real-time current control value of the battery, the internal resistance control value of the battery, the real-time temperature control value of the battery, the ambient temperature control value, the ambient humidity control value, and the ambient atmospheric pressure control value of the battery are obtained from the database. In this embodiment, the ambient temperature, the ambient humidity, the ambient atmospheric pressure, the real-time voltage of the battery, the real-time current of the battery, the internal resistance of the battery, and the real-time temperature of the battery are all important factors affecting the lithium-ion charging process. The ambient temperature is crucial to the thermal management of the battery during charging. Too high or too low ambient temperature may affect the charging efficiency and safety of the battery, and may even cause the battery to be overheated or overcooled and damaged, thereby causing the continuous charging characteristic value of the lithium-ion battery to become smaller. Excessive humidity may cause short circuits or corrosion of the battery shell or circuit, while low humidity has less direct impact on battery performance, resulting in a smaller recharge characteristic value of lithium-ion batteries. Abnormal ambient atmospheric pressure may cause lithium-ion batteries to swell or degrade performance, resulting in a smaller recharge characteristic value of lithium-ion batteries. If the real-time battery voltage is too high, it may cause the battery to be overcharged. If the real-time battery voltage is too low, it may cause the battery to be unable to be fully charged or the charging efficiency is low. Excessive real-time battery current may cause the battery to overheat. If the real-time battery current is too low, the charging efficiency will be reduced. Abnormal internal resistance of the battery may cause more heat to be generated during charging, and the battery may overheat, which may also reduce the charging efficiency of the battery. The real-time temperature of the battery has a significant impact on its charging performance. If the battery temperature is too high, the chemical reaction during the charging process will be accelerated, which may cause the battery to overheat and increase capacity attenuation. If the real-time battery temperature is too low, the lithium ion migration speed will slow down, the charging efficiency will be low, and the battery may not be fully charged or perform unstable.

[0056] In this embodiment, the ambient temperature, ambient humidity, ambient atmospheric pressure, battery real-time voltage, battery real-time current, battery internal resistance and battery real-time temperature affect each other. The ambient temperature has an important influence on the voltage and current output of the battery. At low temperatures, the chemical reaction rate inside the battery slows down, resulting in a decrease in the voltage and current output of the battery. In a high temperature environment, the chemical reaction is accelerated and the current of the battery may increase. The internal resistance of the battery usually decreases with increasing temperature. At high temperatures, the conductivity of the electrolyte of the battery is enhanced, resulting in a decrease in internal resistance. At low temperatures, the internal resistance increases, which may result in a decrease in battery efficiency. The temperature of the battery itself is affected by the ambient temperature. When the ambient temperature is high, the heat of the battery may not be effectively dissipated, resulting in an increase in the battery temperature. High humidity may affect the conductivity of the internal materials of the battery, thereby affecting the internal resistance of the battery. When the real-time current of the battery increases, the voltage of the battery will decrease to a certain extent. The real-time voltage, current and internal resistance of the battery directly reflect the working state of the battery, and they are affected by environmental factors.

[0057] Furthermore, the real-time monitoring result is obtained by processing, and the specific process is: obtaining the recharge characteristic value of the lithium-ion battery, obtaining a preset recharge characteristic threshold, comparing the recharge characteristic value of the lithium-ion battery with the recharge characteristic threshold, when the recharge characteristic value of the lithium-ion battery is greater than or equal to the recharge characteristic threshold, the real-time monitoring result of the real-time capacity division and recharge stage of the lithium-ion battery is a real-time monitoring steady state, and when the recharge characteristic value of the lithium-ion battery is less than the recharge characteristic threshold, the real-time monitoring result of the real-time capacity division and recharge stage of the lithium-ion battery is a real-time monitoring abnormality.

[0058] In this embodiment, the fast charging stage is to charge the lithium-ion battery according to the constant continuous charging current preset in the database. It should be noted that when the lithium-ion battery is in the fast charging stage, the constant voltage charging stage and the trickle charging stage respectively, the continuous charging characteristic values ​​of the lithium-ion battery in the fast charging stage, the constant voltage charging stage and the trickle charging stage need to be compared with the continuous charging characteristic thresholds of the lithium-ion battery in the fast charging stage, the constant voltage charging stage and the trickle charging stage.

[0059] Furthermore, corresponding regulation and control management is performed, and the specific process is as follows: when the real-time monitoring result of the real-time capacity-divided and continuous charging stage of the lithium-ion battery is a real-time monitoring steady state, no regulation operation is performed, and the lithium-ion battery continues to be charged with the current continuous charging current; when the real-time monitoring result of the real-time capacity-divided and continuous charging stage of the lithium-ion battery is a real-time monitoring abnormality, the difference between the continuous charging characteristic value of the lithium-ion battery and the continuous charging characteristic threshold is extracted, recorded as the continuous charging current adjustment value, and the continuous charging current adjustment value is matched with the continuous charging current reduction value corresponding to each continuous charging current adjustment value interval preset in the database to obtain the continuous charging current reduction value corresponding to the interval where the continuous charging current adjustment value is located, recorded as the continuous charging current reduction value of the lithium-ion battery; the real-time continuous charging current minus the continuous charging current reduction value of the lithium-ion battery is obtained to obtain the continuous charging current of the lithium-ion battery, and regulation and control are performed.

[0060] In this embodiment, when extracting the difference between the recharge characteristic value of the lithium-ion battery and the recharge characteristic threshold value of the real-time capacity-divided recharge stage of the lithium-ion battery, it is necessary to extract the difference between the recharge characteristic value of the lithium-ion battery and the recharge characteristic threshold value corresponding to the stage in which it is located. In addition, when the real-time monitoring result of the lithium-ion battery is abnormal in real-time monitoring, it is necessary to slow down the charging current of the lithium-ion battery to ensure the charging state of the lithium-ion battery, so the recharge current downward adjustment value of the lithium-ion battery is subtracted. This embodiment adjusts the recharge current by obtaining the recharge current adjustment value of the lithium-ion battery. The improper charging current can be adjusted in time to achieve precise control of the charging process of the lithium-ion battery.

[0061] The charging control device for lithium-ion batteries provided in the embodiment of the present application includes: a battery performance acquisition module, a pre-charging module, a divided capacity continuous charging module and an adjustment module: a battery performance analysis module: used for the pre-charging controller to sense the charging trigger signal of the lithium-ion battery, and start the battery performance sensor to retrieve the performance characterization parameters of the lithium-ion battery for processing, so as to obtain the performance characterization coefficient of the lithium-ion battery; the pre-charging module: used for analyzing and obtaining the pre-charging execution condition information of the lithium-ion battery based on the performance characterization coefficient of the lithium-ion battery, and activating the power storage controller to pre-charge the lithium-ion battery with the pre-charging execution condition information, and synchronously monitoring the pre-charging performance data of the lithium-ion battery; the divided capacity continuous charging module: used for processing based on the pre-charging performance data of the lithium-ion battery, determining the initial divided capacity continuous charging parameters of the lithium-ion battery, and controlling the divided capacity continuous charging of the lithium-ion battery through the power storage controller with the initial divided capacity continuous charging parameters; and the adjustment module: used for real-time monitoring of the process of divided capacity continuous charging control of the lithium-ion battery, and obtaining the real-time monitoring results for corresponding adjustment control management.

[0062] In summary, the embodiments of the present application obtain and analyze the performance characterization coefficients of the lithium-ion battery to obtain the pre-charging execution condition information of the lithium-ion battery, and pre-charge is performed based on the pre-charging execution condition information, thereby effectively ensuring the rationality of the pre-charging execution conditions of the lithium-ion battery, reducing the damage to the lithium-ion battery caused by unreasonable pre-charging execution, and monitoring the pre-charging performance data for analysis to determine the initial-stage capacity-dividing and continuous charging parameters, and can accurately and effectively adjust the initial-stage capacity-dividing and continuous charging parameters of the lithium-ion battery in time according to the pre-charging situation of the lithium-ion battery, thereby improving the charging efficiency of the lithium-ion battery, and then monitor the process of capacity-dividing and continuous charging control in real time and perform corresponding adjustment, control and management, so as to timely and accurately adjust the charging situation of the lithium-ion battery, reduce the damage to the lithium-ion battery, and increase the life of the lithium-ion battery.

[0063] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0064] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks 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 produce 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.

[0065] 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.

[0066] 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.

[0067] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0068] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A charging control method for a lithium-ion battery, characterized in that: The following steps are involved: The pre-charge controller senses the charging trigger signal of the lithium-ion battery, and starts the battery performance sensor to retrieve the performance characterization parameters of the lithium-ion battery for processing, thereby obtaining the performance characterization coefficient of the lithium-ion battery; Based on the performance characterization coefficient of the lithium-ion battery, the pre-charge execution condition information of the lithium-ion battery is analyzed and obtained, and the storage controller is activated to pre-charge the lithium-ion battery with the pre-charge execution condition information, and the pre-charge performance data of the lithium-ion battery is simultaneously monitored; Based on the pre-charge performance data of the lithium-ion battery, the initial stage capacity-divided continuous charging parameters of the lithium-ion battery are processed, and the lithium-ion battery is controlled by the power storage controller with the initial stage capacity-divided continuous charging parameters; The process of lithium-ion battery capacity-dividing and continuous charging control is monitored in real time, and corresponding adjustment, control and management are carried out by obtaining real-time monitoring results.

2. A charging control method for a lithium-ion battery as claimed in claim 1, characterized in that: The starting battery performance sensor retrieves the performance characteristic parameters of the lithium-ion battery for processing, and the specific process is as follows: Starting the battery performance sensor to obtain the performance characterization parameters of the lithium-ion battery, and processing the parameters in combination with a preset lithium-ion battery performance characterization parameter control set to obtain the performance characterization coefficient of the lithium-ion battery; The performance characterization parameters of the lithium-ion battery include: battery open circuit voltage, battery initial internal resistance, battery current full load capacity, battery rated capacity and battery historical average operating temperature; The performance characterization coefficient of the lithium-ion battery is used to characterize the current basic performance of the lithium-ion battery.

3. A charging control method for a lithium-ion battery as claimed in claim 2, characterized in that: The specific method for obtaining the performance characterization coefficient of the lithium-ion battery is: Wherein, α represents the performance characterization coefficient of the lithium-ion battery, U represents the open circuit voltage of the battery, U′ represents the preset open circuit voltage reference value of the battery, R represents the initial internal resistance of the battery, R′ represents the preset initial internal resistance reference value of the battery, Q represents the current full load capacity of the battery, Q′ represents the rated capacity of the battery, T represents the historical average operating temperature of the battery, T′ represents the preset historical average operating temperature reference value of the battery, and e is a natural constant.

4. A charging control method for a lithium-ion battery as claimed in claim 1, characterized in that: The analysis obtains the pre-charge execution condition information of the lithium-ion battery, and the specific process is as follows: Obtaining a performance characterization coefficient of the lithium-ion battery, matching the performance characterization coefficient of the lithium-ion battery with pre-set pre-charge execution condition information corresponding to each performance characterization coefficient interval, obtaining the pre-charge execution condition information corresponding to the interval in which the performance characterization coefficient of the lithium-ion battery is located, and recording it as the pre-charge execution condition information of the lithium-ion battery; The pre-charging execution condition information of the lithium-ion battery specifically includes: pre-charging current and preset charging time.

5. A charging control method for a lithium-ion battery as claimed in claim 1, characterized in that: The processing is based on the pre-charge performance data of the lithium-ion battery, and the specific process is as follows: Pre-charging the lithium-ion battery according to the pre-charging execution condition information, obtaining pre-charging performance data of the lithium-ion battery, and obtaining a pre-charging performance value of the lithium-ion battery by analyzing the pre-charging performance data of the lithium-ion battery; The pre-charge performance value of the lithium-ion battery is used to characterize the pre-charge health status of the lithium-ion battery; The pre-charge performance data of the lithium-ion battery includes: pre-charge execution time, battery voltage rise rate, battery current rise rate and battery temperature rise rate.

6. A charging control method for a lithium-ion battery as claimed in claim 1, characterized in that: The specific process of determining the initial capacity-dividing and continuous charging parameters of the lithium-ion battery is as follows: Obtaining a pre-charge performance value of the lithium-ion battery, obtaining a preset pre-charge performance threshold, comparing the pre-charge performance value of the lithium-ion battery with the pre-charge performance threshold, and when the pre-charge performance value of the lithium-ion battery is greater than or equal to the pre-charge performance threshold, performing fractional capacity recharge on the lithium-ion battery with a default initial fractional capacity recharge parameter; When the pre-charge performance value of the lithium-ion battery is less than the pre-charge performance threshold, extract the difference between the pre-charge performance value of the lithium-ion battery and the pre-charge performance threshold, record it as the fractional capacity continuous charging adjustment value, and match the fractional capacity continuous charging adjustment value of the lithium-ion battery with the primary fractional capacity continuous charging parameter adjustment value corresponding to each fractional capacity continuous charging adjustment value interval preset in the database, obtain the primary fractional capacity continuous charging parameter adjustment value corresponding to the interval where the fractional capacity continuous charging adjustment value of the lithium-ion battery is located, record it as the primary fractional capacity continuous charging parameter adjustment value of the lithium-ion battery; The default primary-order capacity-dividing and charging parameter is added to the primary-order capacity-dividing and charging parameter adjustment value of the lithium-ion battery to obtain the primary-order capacity-dividing and charging parameter of the lithium-ion battery, wherein the default primary-order capacity-dividing and charging parameter is a default fast charging cutoff capacity value and a default constant voltage charging cutoff capacity value, and the primary-order capacity-dividing and charging parameter adjustment value includes a fast charging cutoff capacity adjustment value and a constant voltage charging cutoff capacity adjustment value.

7. A charging control method for a lithium-ion battery as claimed in claim 1, characterized in that: The real-time monitoring results are obtained to perform corresponding regulation and control management, and the specific process is as follows: Obtaining environmental impact parameters and charging characteristic data of lithium-ion batteries during the process of lithium-ion battery capacity division and charging, determining the real-time capacity division and charging stage of the lithium-ion batteries, and obtaining a reference set of the real-time capacity division and charging stage of the lithium-ion batteries; The environmental impact parameters during the lithium-ion battery capacity-divided and recharged process, the recharged characteristic data of the lithium-ion battery, and the control set of the real-time capacity-divided and recharged stage of the lithium-ion battery are processed to obtain the recharged characteristic value of the lithium-ion battery; The environmental impact parameters include: ambient temperature, ambient humidity and ambient atmospheric pressure; The continuous charging characteristic data of the lithium-ion battery includes: real-time battery voltage, real-time battery current, battery internal resistance and real-time battery temperature; Based on the recharge characteristic value of the lithium-ion battery, the real-time monitoring results are processed and corresponding adjustment, control and management are carried out; The real-time monitoring result is real-time monitoring of steady state or real-time monitoring of abnormality.

8. A charging control method for a lithium-ion battery as claimed in claim 7, characterized in that: The processing obtains real-time monitoring results, and the specific process is as follows: Obtain a recharge characteristic value of the lithium-ion battery, obtain a preset recharge characteristic threshold, compare the recharge characteristic value of the lithium-ion battery with the recharge characteristic threshold, when the recharge characteristic value of the lithium-ion battery is greater than or equal to the recharge characteristic threshold, the real-time monitoring result of the real-time capacity division and recharge stage of the lithium-ion battery is a real-time monitoring steady state, when the recharge characteristic value of the lithium-ion battery is less than the recharge characteristic threshold, the real-time monitoring result of the real-time capacity division and recharge stage of the lithium-ion battery is a real-time monitoring abnormality.

9. A charging control method for a lithium-ion battery as claimed in claim 7, characterized in that: The corresponding regulation and control management is carried out, and the specific process is as follows: When the real-time monitoring result of the real-time capacity-divided continuous charging stage of the lithium-ion battery is a real-time monitoring steady state, no adjustment operation is performed, and the lithium-ion battery continues to be charged with the current continuous charging current. When the real-time monitoring result of the real-time capacity-divided continuous charging stage of the lithium-ion battery is a real-time monitoring abnormality, the difference between the continuous charging characteristic value of the lithium-ion battery and the continuous charging characteristic threshold is extracted, recorded as the continuous charging current adjustment value, and the continuous charging current adjustment value is matched with the continuous charging current downward adjustment value corresponding to each continuous charging current adjustment value interval preset in the database, and the continuous charging current downward adjustment value corresponding to the interval where the continuous charging current adjustment value is located is obtained, and recorded as the continuous charging current downward adjustment value of the lithium-ion battery; The real-time charging current minus the charging current downward adjustment value of the lithium-ion battery is used to obtain the charging current of the lithium-ion battery, and the charging current is adjusted and controlled.

10. A charging control device for a lithium-ion battery, characterized in that: It includes battery performance acquisition module, pre-charging module, capacity-based charging module and adjustment module: Battery performance analysis module: used for the pre-charge controller to sense the charging trigger signal of the lithium-ion battery, and start the battery performance sensor to retrieve the performance characterization parameters of the lithium-ion battery for processing, and obtain the performance characterization coefficient of the lithium-ion battery; Pre-charge module: used to analyze and obtain the pre-charge execution condition information of the lithium-ion battery based on the performance characterization coefficient of the lithium-ion battery, activate the power storage controller to pre-charge the lithium-ion battery with the pre-charge execution condition information, and simultaneously monitor the pre-charge performance data of the lithium-ion battery; Capacity-divided continuous charging module: used to process the pre-charge performance data of the lithium-ion battery, determine the initial capacity-divided continuous charging parameters of the lithium-ion battery, and control the capacity-divided continuous charging of the lithium-ion battery with the initial capacity-divided continuous charging parameters through the power storage controller; Regulation module: used to monitor the process of lithium-ion battery capacity division and continuous charging control in real time, obtain the real-time monitoring results and perform corresponding regulation and control management.

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