CN113555939B - Distributed BMS battery active equalization management system - Google Patents

Distributed BMS battery active equalization management system Download PDF

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CN113555939B
CN113555939B CN202110856214.9A CN202110856214A CN113555939B CN 113555939 B CN113555939 B CN 113555939B CN 202110856214 A CN202110856214 A CN 202110856214A CN 113555939 B CN113555939 B CN 113555939B
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single battery
charging
value
battery
discharging
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CN113555939A (en
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张家斌
张家武
文艺
田昊
赵怀坤
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Shenzhen Chaosiwei Electronics Co ltd
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Shenzhen Chaosiwei Electronics Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/005—Detection of state of health [SOH]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electrochemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The invention provides a distributed BMS battery active equalization management system, which comprises: the acquisition module is used for acquiring the overall voltage of a battery pack and the voltage of each single battery in the battery pack; the control module is used for setting an active equalization strategy of each single battery according to the acquired voltage of the acquisition module and controlling each single battery to charge or discharge according to the active equalization strategy; the monitoring module is used for monitoring the external environment in the active equalization process of each single battery and adjusting the active equalization process according to the monitoring result; through carrying out initiative equilibrium to the battery cell to outside environment is monitored at the in-process of initiative equilibrium, guarantee the validity of initiative equilibrium process, finally improve the charge-discharge efficiency and the availability factor of whole group battery, practice thrift the electric energy.

Description

Distributed BMS battery active equalization management system
Technical Field
The invention relates to the technical field of battery management systems, in particular to a distributed BMS battery active equalization management system.
Background
Lithium battery packs are usually composed of one or several battery packs connected in parallel, each battery pack being composed of a plurality of batteries connected in series. The combination mode can simultaneously meet the voltage and power requirements needed by notebook computers, medical equipment, testing instruments and industrial application.
However, in the process of charging and discharging the lithium battery, the whole charging is stopped as long as one battery is fully charged, or the whole discharging is stopped as long as one battery is discharged, and in the process of charging and discharging, the external environments such as temperature, humidity and the like are not monitored, so that the charging and discharging efficiency of the battery pack is low, the use efficiency is low, and the waste of electric energy is caused.
Disclosure of Invention
The invention provides a distributed BMS battery active equalization management system, which can ensure the effectiveness of an active equalization process by actively equalizing single batteries and monitoring the external environment in the active equalization process, finally improve the charging and discharging efficiency and the use efficiency of the whole battery pack and save electric energy.
The invention provides a distributed BMS battery active equalization management system, which comprises:
the acquisition module is used for acquiring the overall voltage of the battery pack and the voltage of each single battery in the battery pack;
the control module is used for setting an active equalization strategy of each single battery according to the acquired voltage of the acquisition module and controlling each single battery to charge or discharge according to the active equalization strategy;
and the monitoring module is used for monitoring the external environment of each single battery in the active equalization process and adjusting the active equalization process according to the monitoring result.
In one possible way of realisation,
the acquisition module comprises:
the voltage acquisition unit is used for acquiring the voltage of the battery pack and each single battery in the battery pack to acquire an acquisition signal;
the signal adjusting unit is used for filtering the acquired signals, acquiring abnormal signals in the acquired signals, acquiring the difference between an acquisition channel of the voltage acquisition unit in the acquisition process and a preset standard signal acquisition channel, and setting an acquisition error based on the difference;
the signal adjusting unit is further configured to determine an adjusting coefficient by using the acquisition error based on the standard acquisition signal acquired in the preset standard signal acquisition channel, and adjust the acquisition signal according to the adjusting coefficient to obtain a target acquisition signal;
the AD conversion unit is used for carrying out AD conversion on the target acquisition signal, intercepting short pulses of the converted target acquisition signal, acquiring BCD codes corresponding to the short pulses, and sequentially reading the BCD codes corresponding to the short pulses to obtain voltage digital signals;
and the display unit is used for obtaining the total voltage of the battery pack and the voltage of each single battery in the battery pack according to the voltage digital signal and displaying the total voltage and the voltage.
In one possible way of realisation,
the communication module is connected with the acquisition module and the control module and used for transmitting the voltage acquired by the acquisition module to the control module.
In one possible way of realisation,
the control module includes:
the setting unit is used for acquiring the total voltage of the battery pack and the voltage value of each single battery, determining the difference between the total voltage of the battery pack and the sum of the voltage values of all the single batteries, and correcting the average voltage value of all the single batteries according to the difference to obtain a reference voltage value;
a judging unit for judging whether the voltage value of each single battery is smaller than the reference voltage value;
if so, determining the corresponding single battery as a single battery to be charged;
otherwise, judging whether the voltage value of each single battery is larger than the preset voltage value;
if so, determining the corresponding single battery as a single battery to be discharged;
otherwise, determining that the corresponding single battery does not participate in active balancing;
wherein the reference voltage value is smaller than a preset voltage value;
the state determining unit is used for determining the health state of each single battery according to the charge and discharge records of each single battery;
the strategy determining unit is used for determining the charging or discharging time and the charging or discharging current of the single battery to be charged and the single battery to be discharged according to the health state of each single battery to obtain an active equalization strategy;
and the control unit is used for controlling the charging and discharging unit to charge or discharge the single battery according to the active equalization strategy.
In one possible way of realisation,
the state determination unit includes:
the acquisition subunit is used for acquiring charging or discharging records of the single battery to be charged and the single battery to be discharged within preset historical time, wherein the charging or discharging records comprise charging or discharging times, charging or discharging states, charging or discharging time and charging or discharging temperature;
a setting subunit, configured to determine, according to the charging or discharging state, an initial charge value and a final charge value of each time of charging or discharging the to-be-charged battery cell and the to-be-discharged battery cell, to obtain a charge difference set, determine an index value set based on the charge difference set, and set a first weight to an index value in the index value set according to the charging or discharging time;
the setting subunit is further configured to determine a temperature variation curve of the to-be-charged single battery and the to-be-discharged single battery in each charging or discharging process according to the charging or discharging temperature, analyze the temperature variation curve to obtain a temperature variation amplitude and a temperature average value, and set a second weight for an index value in the index value set based on the temperature variation amplitude and the temperature average value;
the calculating subunit is used for calculating a first health value of each single battery based on the first weight and the second weight of the index value set;
the acquiring subunit is further configured to acquire a change degree of an upper limit charging value of each single battery in each charging process, and determine a charging attenuation coefficient of each single battery based on the change degree of the upper limit charging value;
the obtaining subunit is further configured to obtain a discharge rate change condition of each single battery in a discharge process, and determine a discharge attenuation coefficient of each single battery based on the discharge rate change condition;
the obtaining subunit is further configured to obtain a battery internal resistance change condition of each single battery after the charging and discharging are completed, and determine an internal resistance increase coefficient of each single battery based on the battery internal resistance change condition;
the calculating subunit is further configured to calculate a second health value of each single battery according to the charge attenuation coefficient, the discharge attenuation coefficient, and the internal resistance increase coefficient of each single battery;
and the determining subunit is used for determining the state of health of each single battery according to the first health value and the second health value of each single battery.
In one possible way of realisation of the invention,
the determining subunit includes:
a first determining subunit, configured to determine an overall health value of each of the unit batteries according to the first health value and the second health value;
the comparison subunit is used for comparing the overall health value with a preset health value range;
if the overall health value is larger than the preset health value range, determining that the health state of the corresponding single battery is excellent;
if the total health value is within the preset health value range, determining that the health state of the corresponding single battery is good;
and if the total health value is smaller than the set health value range, determining the health state of the corresponding single battery to be qualified.
In one possible way of realisation,
the policy determination unit includes:
the dividing subunit is used for carrying out grade division on the single batteries according to the health state of each single battery and determining the grades of the single batteries to be charged and the single batteries to be discharged according to the grade division result;
the distribution subunit is used for distributing a first charging current for the single battery to be charged and distributing a first discharging current for the single battery to be discharged according to the grades of the single battery to be charged and the single battery to be discharged;
the distribution subunit is further configured to determine a first charging time or a first discharging time according to the difference between the preset voltage value and the single battery to be charged and the preset voltage value and the distributed first charging current or first discharging current;
the judging subunit is used for judging whether the external power supply is needed according to the total charging amount of all the single batteries to be charged and the total discharging amount of the single batteries to be discharged;
if so, adding an external power supply for power supply in the active balancing process;
otherwise, in the active balancing process, no external power supply is added for power supply;
the setting subunit is used for acquiring the arrangement positions of the single batteries to be charged and the single batteries to be discharged in the battery pack, and setting a charging time point and a discharging time point for each single battery and a time point for supplying power by an external power supply according to the charging time and the charging efficiency of the single batteries to be charged and the discharging time and the discharging efficiency of the single batteries to be discharged;
the detection subunit is used for obtaining a preliminary active equalization strategy according to the first charging current, the first charging time and the charging time point of the single battery to be charged and the first discharging current, the first discharging time and the discharging time point of the single battery to be discharged, inputting the active equalization strategy into a preset strategy evaluation model to obtain an evaluation result, and judging whether the evaluation result meets the preset active equalization requirement;
if so, determining the preliminary active equalization strategy as a final active equalization strategy;
otherwise, analyzing the evaluation result, and determining that the evaluation result does not meet the factors;
if the unsatisfied factor is a time factor, adjusting the first charging current of the single battery to be charged or the first discharging current of the single battery to be discharged according to the time requirement in a preset active equalization requirement to obtain a second charging current or a second discharging current, optimizing the charging time point and the discharging time point according to the second charging current or the second discharging current, and obtaining an adjusted active equalization strategy as a final active equalization strategy;
and if the unsatisfied factor is a charging current factor, adjusting the first charging current of the single battery to be charged and the first discharging current of the single battery to be discharged according to a current requirement in a preset active equalization requirement, and obtaining an adjusted active equalization strategy as a final active equalization strategy.
In one possible way of realisation,
the monitoring module includes:
and the system is used for monitoring the external environment of each single battery in the active equalization process and adjusting the active equalization process according to the monitoring result.
The monitoring unit is used for monitoring the temperature value and the environment humidity value of the single battery in the active equalization process;
the reminding unit is used for judging whether the temperature value of the single battery is larger than a preset temperature value or not;
if so, performing first alarm reminding;
otherwise, not carrying out alarm reminding and keeping the dynamic balance process;
the reminding unit is also used for judging whether the environment humidity value of the single battery is larger than a first preset humidity value or smaller than a second preset humidity value, wherein the first humidity value is larger than the second humidity value;
if the humidity value is larger than the first preset humidity value, second alarm reminding is carried out;
if the humidity value is smaller than the second preset humidity value, third alarm reminding is carried out;
otherwise, not carrying out alarm reminding and keeping the dynamic balance process;
the adjusting unit is used for determining a target single battery when the first alarm prompt is received, reducing the charging and discharging current of the target single battery, starting a cooling module to cool the target single battery, and recovering the charging current or the discharging current of the target single battery when the temperature value of the target single battery is reduced to be smaller than the preset temperature value;
the adjusting unit is further configured to stop the active equalization process of the whole battery pack when the second alarm prompt is received, start the dehumidification module to dehumidify the environment, and resume the active equalization process of the whole battery pack until the environment humidity value is smaller than a first preset humidity value;
the adjusting unit is further used for stopping the active equalization process of the whole battery pack when the third alarm prompt is received, starting the cooling module to perform cooling and humidifying treatment on the whole battery pack until the ambient humidity value is greater than a second preset humidity value, and recovering the active equalization process of the whole battery pack.
In one possible way of realisation,
the cooling module comprises two modes, one mode is a cooling mode, and the other mode is a cooling and humidifying mode.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a structural diagram of an active equalization management system of a distributed BMS battery according to an embodiment of the present invention;
FIG. 2 is a block diagram of the control module in an embodiment of the present invention;
fig. 3 is a block diagram of a policy determination unit in an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it should be understood that they are presented herein only to illustrate and explain the present invention and not to limit the present invention.
Example 1
An embodiment of the present invention provides a distributed BMS battery active equalization management system, as shown in fig. 1, including:
the acquisition module is used for acquiring the overall voltage of the battery pack and the voltage of each single battery in the battery pack;
the control module is used for setting an active equalization strategy of each single battery according to the acquired voltage of the acquisition module and controlling each single battery to charge or discharge according to the active equalization strategy;
and the monitoring module is used for monitoring the external environment of each single battery in the active equalization process and adjusting the active equalization process according to the monitoring result.
In this embodiment, the battery pack is composed of a plurality of unit batteries.
In this embodiment, the active equalization strategy is to discharge the single battery with a large electric quantity to the single battery with a small electric quantity, or charge the single battery with a low electric quantity by means of an external power supply, so that the electric quantities of the single batteries of the whole battery pack are basically consistent, and thus, in the process of charging other electric appliances by the battery pack, the situation that the discharge of the whole battery pack is stopped due to the fact that one battery is discharged quickly due to the low electric quantity does not occur.
In this embodiment, the BMS represents a battery management system.
In this embodiment, the external environment includes the humidity of the charging or discharging environment, the charging or discharging temperature.
In this embodiment, the adjusting the active equalization process according to the monitoring result is specifically adjusting a charging or discharging time point and a charging or discharging current in the active equalization process.
In this embodiment, in the active equalization process, the essence is that the single battery with lower electric quantity is charged, the single battery with higher electric quantity is discharged, and the energy discharged from the single battery with higher electric quantity is used for charging the single battery with lower electric quantity, so that the difference of the voltage values of all the single batteries in the entire battery pack is reduced, and the active equalization of the battery pack is realized.
The beneficial effect of above-mentioned design is: through carrying out initiative equilibrium to the battery cell to outside environment is monitored at the in-process of initiative equilibrium, guarantees the validity of initiative equilibrium process, finally improves the charge-discharge efficiency and the availability factor of whole group battery, practices thrift the electric energy.
Example 2
Based on embodiment 1, an embodiment of the present invention provides a distributed BMS battery active equalization management system, where the acquisition module includes:
the voltage acquisition unit is used for acquiring the voltage of the battery pack and each single battery in the battery pack to acquire an acquisition signal;
the signal adjusting unit is used for filtering the acquired signals, acquiring abnormal signals in the acquired signals, acquiring the difference between an acquisition channel of the voltage acquisition unit in the acquisition process and a preset standard signal acquisition channel, and setting an acquisition error based on the difference;
the signal adjusting unit is further configured to determine an adjusting coefficient by using the acquisition error based on the standard acquisition signal acquired in the preset standard signal acquisition channel, and adjust the acquisition signal according to the adjusting coefficient to obtain a target acquisition signal;
the AD conversion unit is used for carrying out AD conversion on the target acquisition signal, intercepting short pulses of the converted target acquisition signal, acquiring BCD codes corresponding to the short pulses, and sequentially reading the BCD codes corresponding to the short pulses to obtain voltage digital signals;
and the display unit is used for obtaining the total voltage of the battery pack and the voltage of each single battery in the battery pack according to the voltage digital signal and displaying the total voltage and the voltage.
In this embodiment, the collected signals are filtered, and the abnormal signals in the collected signals are obtained as abnormal signals caused by fluctuation in the collection process.
In this embodiment, the acquisition channel of the voltage acquisition unit in the acquisition process is related to the configuration of the voltage acquisition unit, and the preset standard signal acquisition channel is an acquisition channel in an ideal state and is not interfered by any outside world.
In this embodiment, the standard collected signal is a signal collected without any external interference.
In this embodiment, the method for determining the adjustment coefficient is to determine the difference between the acquired error and the standard acquired signal, determine the adjustment coefficient according to the difference, and adjust the acquired signal according to the adjustment coefficient, so that the signal acquisition error caused by abnormal fluctuation can be eliminated, and the accuracy and reliability of the acquired signal can be ensured.
In this embodiment, the BCD code is a 1-digit decimal number represented by a 4-digit binary number.
In this embodiment, the accuracy of the AD conversion unit is 4 bits, and includes four short pulses, where the four short pulses respectively indicate values corresponding to one, ten, hundred, and thousand, and one short pulse includes high bits and low bits in four time periods, where the high bits indicate 1 and the low bits indicate 0.
The beneficial effect of above-mentioned design is: the acquisition module is used for adjusting and high-precision AD conversion of the acquired signals, so that the accuracy and reliability of the acquired voltage are guaranteed, and an accurate voltage value is provided for the charge and discharge strategy of the single battery, so that the reliability of the charge and discharge strategy is guaranteed, and finally, the charge and discharge efficiency is improved.
Example 3
Based on embodiment 1, the embodiment of the present invention provides a distributed BMS battery active equalization management system, further comprising a communication module connected to the acquisition module and the control module, for transmitting the voltage acquired by the acquisition module to the control module.
In this embodiment, the communication module adopts a CAN communication mode.
The beneficial effect of above-mentioned design is: by adopting the CAN communication mode, the device has the advantages of strong real-time performance, long transmission distance, strong anti-electromagnetic interference capability, low cost and the like, adopts the two-wire serial communication mode, has strong error detection capability, CAN work in a high-noise interference environment, ensures the timeliness of voltage data transmission, and further improves the charge and discharge efficiency.
Example 4
Based on embodiment 1, an embodiment of the present invention provides a distributed BMS battery active equalization management system, as shown in fig. 2, where the control module includes:
the setting unit is used for acquiring the total voltage of the battery pack and the voltage value of each single battery, determining the difference between the total voltage of the battery pack and the sum of the voltage values of all the single batteries, and correcting the average voltage value of all the single batteries according to the difference to obtain a reference voltage value;
a judging unit for judging whether the voltage value of each single battery is smaller than the reference voltage value;
if yes, determining the corresponding single battery as a single battery to be charged;
otherwise, judging whether the voltage value of each single battery is larger than the preset voltage value;
if so, determining the corresponding single battery as a single battery to be discharged;
otherwise, determining that the corresponding single battery does not participate in active balancing;
wherein the reference voltage value is smaller than a preset voltage value;
the state determining unit is used for determining the health state of each single battery according to the charge and discharge records of each single battery;
the strategy determining unit is used for determining the charging or discharging time and the charging or discharging current of the single battery to be charged and the single battery to be discharged according to the health state of each single battery to obtain an active equalization strategy;
and the control unit is used for controlling the charging and discharging unit to charge or discharge the single battery according to the active equalization strategy.
In this embodiment, the average voltage value of all the single batteries is corrected according to the difference value, and the obtained reference voltage value is specifically, for example, if the difference value is 5 and the average voltage value is 100, the reference voltage value is
Figure BDA0003184065810000111
The reference voltage value is used as a judgment standard for charging the single battery, so that the active equalization process is more reasonable.
In this embodiment, the preset voltage value is used as a criterion for determining the discharge of the single battery, and the single battery which does not need to be charged and discharged is not subjected to any operation, so that the active equalization process can be simplified, and the efficiency of the active equalization process can be improved.
In this embodiment, the single battery to be charged corresponds to a charging time and a charging current; and the single battery to be discharged corresponds to discharge time and discharge current.
The beneficial effect of above-mentioned design is: the active equalization strategy is set according to the current voltage value and the health state of the single battery, so that the reasonability and the efficiency of the active equalization strategy are guaranteed, and the charging and discharging efficiency of the battery pack is guaranteed.
Example 5
Based on embodiment 4, an embodiment of the present invention provides a distributed BMS battery active equalization management system, where the state determination unit includes:
the acquisition subunit is used for acquiring charging or discharging records of the single battery to be charged and the single battery to be discharged within preset historical time, wherein the charging or discharging records comprise charging or discharging times, charging or discharging states, charging or discharging time and charging or discharging temperature;
a setting subunit, configured to determine, according to the charging or discharging state, an initial charge value and a final charge value of each time of charging or discharging the to-be-charged battery cell and the to-be-discharged battery cell, to obtain a charge difference set, determine an index value set based on the charge difference set, and set a first weight to an index value in the index value set according to the charging or discharging time;
the setting subunit is further configured to determine a temperature variation curve of the to-be-charged single battery and the to-be-discharged single battery in each charging or discharging process according to the charging or discharging temperature, analyze the temperature variation curve to obtain a temperature variation amplitude and a temperature average value, and set a second weight for an index value in the index value set based on the temperature variation amplitude and the temperature average value;
a calculating subunit, configured to calculate a first health value of each cell based on the first weight and the second weight of the set of index values, where the calculation formula is as follows:
Figure BDA0003184065810000121
wherein, W 1 Represents a first health value, T, corresponding to the single battery 0 Represents a predetermined standard time, T n Represents the charging or discharging time of the single battery, delta represents the temperature change amplitude value of the single battery, the value is (0.2, 0.8), and P is 0 Represents the average temperature value, P, of the single battery n Represents a preset temperature value, Q represents an index value of the unit battery,
Figure BDA0003184065810000122
a first weight is represented for the first weight,
Figure BDA0003184065810000123
representing the second weight;
the acquiring subunit is further configured to acquire a change degree of an upper limit charging value of each single battery in each charging process, and determine a charging attenuation coefficient of each single battery based on the change degree of the upper limit charging value;
the obtaining subunit is further configured to obtain a discharge rate change condition of each single battery in a discharge process, and determine a discharge attenuation coefficient of each single battery based on the discharge rate change condition;
the obtaining subunit is further configured to obtain a battery internal resistance change condition of each single battery after the charging and discharging are completed, and determine an internal resistance increase coefficient of each single battery based on the battery internal resistance change condition;
the calculating subunit is further configured to calculate a second health value of each single battery according to the charge decay coefficient, the discharge decay coefficient, and the internal resistance increase coefficient of each single battery, and a calculation formula of the second health value is as follows:
Figure BDA0003184065810000131
wherein, W 2 The second health value of the single battery is represented, gamma represents the internal resistance attenuation coefficient of the single battery, the value is (0.1, 0.3), alpha represents the charge attenuation coefficient of the single battery, the value is (0.2, 0.8), beta represents the discharge electrical attenuation coefficient of the single battery, and the value is (0.2, 0.8);
and the determining subunit is used for determining the state of health of each single battery according to the first health value and the second health value of each single battery.
In this embodiment, the single battery to be charged corresponds to a charging record, a charging frequency, a charging state, a charging time, a charging temperature and a corresponding temperature variation curve thereof; the single battery to be discharged corresponds to a discharge record, a discharge frequency, a discharge state, a discharge time, a discharge temperature and a corresponding temperature change curve.
In this example, T n The charging or discharging time of the single battery is specifically represented if the single battery is a single battery to be chargedThe battery corresponds to the charging time; and if the single battery is the single battery to be discharged, corresponding to the discharge time.
In this embodiment, the charge difference refers to a difference between a final charge value and an initial charge value during a charging process, and refers to a difference between the initial charge value and the final charge value during a discharging process.
In this embodiment, the index value set refers to an index value size determined according to a power difference value in each charge and discharge process, and the larger the power difference value is, the larger the index value is.
In this embodiment, the smaller the charging or discharging time, the larger the first weight.
In this embodiment, the smaller the variation amplitude and the smaller the temperature average value, the larger the second weight.
In this embodiment, the greater the degree of change in the charging upper limit value, the greater the charge decay coefficient.
In this embodiment, the greater the degree of decrease in the discharge rate, the greater the discharge decay coefficient.
In this embodiment, the greater the increase in the internal resistance of the battery, the greater the internal resistance increase coefficient.
In this embodiment, the larger the charge decay coefficient, the discharge decay coefficient, and the internal resistance increase coefficient, the smaller the corresponding second healthy value.
The beneficial effect of above-mentioned design is: the method comprises the steps of determining a first health value through the number of charging and discharging times, the charging and discharging state, the charging and discharging time and the charging and discharging temperature of a single battery, wherein the first health value is used for representing the influence of external influence of the single battery on the health of the single battery, determining the first health value through a charging attenuation coefficient, a discharging attenuation coefficient and an internal resistance increase coefficient, and determining a second health value is used for representing the influence of internal change of the single battery on the health of the single battery.
Example 6
Based on embodiment 5, an embodiment of the present invention provides a distributed BMS active equalization management system, where the determining subunit includes:
a first determining subunit, configured to determine an overall health value of each of the single batteries according to the first health value and the second health value, where the calculation formula is as follows:
W＝τ 1 *W 1 +τ 2 *W 2
wherein W represents the overall health value of the battery, τ 1 A weight, τ, representing the first health value 2 Is a weight of the second health value, and τ 1 +τ 2 ＝1；
The comparison subunit is used for comparing the overall health value with a preset health value range;
if the total health value is larger than the preset health value range, determining that the health state of the corresponding single battery is excellent;
if the total health value is within the preset health value range, determining that the health state of the corresponding single battery is good;
and if the total health value is smaller than the set health value range, determining the health state of the corresponding single battery to be qualified.
In this embodiment, the weight of the first health value and the weight of the second health value may be specifically set according to actual conditions.
The beneficial effect of above-mentioned design is: the state of the single battery is determined, and a foundation is provided for an active balancing strategy.
Example 7
Based on embodiment 4, an embodiment of the present invention provides a distributed BMS active balancing management system, and as shown in fig. 3, the policy determining unit includes:
the dividing subunit is used for carrying out grade division on the single batteries according to the health state of each single battery and determining the grades of the single batteries to be charged and the single batteries to be discharged according to the grade division result;
the distribution subunit is used for distributing a first charging current for the single battery to be charged and distributing a first discharging current for the single battery to be discharged according to the grades of the single battery to be charged and the single battery to be discharged;
the distribution subunit is further configured to determine a first charging time or a first discharging time according to a difference between the preset voltage value and the distributed first charging current or first discharging current;
the judging subunit is used for judging whether the external power supply is needed according to the total charging amount of all the single batteries to be charged and the total discharging amount of the single batteries to be discharged;
if so, adding an external power supply for power supply in the active balancing process;
otherwise, in the active balancing process, no external power supply is added for power supply;
the setting subunit is used for acquiring the arrangement positions of the single batteries to be charged and discharged in the battery pack, and setting a charging time point and a discharging time point for each single battery and a time point for supplying power by an external power supply according to the charging time and the charging efficiency of the single batteries to be charged and the discharging time and the discharging efficiency of the single batteries to be discharged;
the detection subunit is used for obtaining a preliminary active equalization strategy according to the first charging current, the first charging time and the charging time point of the single battery to be charged and the first discharging current, the first discharging time and the discharging time point of the single battery to be discharged, inputting the active equalization strategy into a preset strategy evaluation model to obtain an evaluation result, and judging whether the evaluation result meets the preset active equalization requirement;
if so, determining the preliminary active equalization strategy as a final active equalization strategy;
otherwise, analyzing the evaluation result to determine that the evaluation result does not meet the factors;
if the unsatisfied factor is a time factor, adjusting the first charging current of the single battery to be charged or the first discharging current of the single battery to be discharged according to a time requirement in a preset active equalization requirement to obtain a second charging current or a second discharging current, optimizing the charging time point and the discharging time point according to the second charging current or the second discharging current, and obtaining an adjusted active equalization strategy as a final active equalization strategy;
and if the unsatisfied factor is a charging current factor, adjusting the first charging current of the single battery to be charged and the first discharging current of the single battery to be discharged according to the current requirement in the preset active equalization requirement, and taking the adjusted active equalization strategy as a final active equalization strategy.
In the embodiment, whether the power is supplied by the external power supply is judged, so that the electric energy can be saved in the process of ensuring the smooth proceeding of the active equalization process.
In this embodiment, the two unit batteries to be charged and discharged, which are closer to each other in the arrangement position of the battery pack, may waste less energy than the energy wasted in the mutual charging and discharging process between the two unit batteries which are farther from each other, and in the active equalization strategy, the two unit batteries which are closer to each other are preferentially selected to be charged or discharged from each other according to the arrangement position, so that the charging or discharging efficiency may be improved, and the electric energy may be saved.
In this embodiment, the setting of the charging time point and the discharging time point for each cell specifically includes reasonably arranging the charging time point and the discharging time point of each cell according to the charging time and the charging efficiency of the cell to be charged and the discharging time and the discharging efficiency of the cell to be discharged, where the set charging time point and the set discharging time point can ensure both the charging and discharging efficiency and the safety, and the charging or discharging process is not affected by an excessively high current caused by the simultaneous charging or discharging of a plurality of cells.
The beneficial effect of above-mentioned design is: the charging or discharging current is determined according to the grade of the battery, the influence on the single battery due to the fact that the charging or discharging current is not too large is guaranteed, the charging or discharging efficiency cannot be influenced due to the fact that the charging or discharging current is not too small, the charging or discharging efficiency is not influenced, the charging or discharging efficiency is guaranteed by setting the charging and discharging time points, the charging and discharging efficiency and the charging or discharging safety are guaranteed, the active equalization strategy is evaluated, timely adjustment is conducted when the requirement is not met, the actual application effect of the active equalization strategy is guaranteed, and finally the charging and discharging efficiency of the whole battery pack can be improved.
Example 8
Based on embodiment 7, an embodiment of the present invention provides a distributed BMS active equalization management system, where the detecting subunit includes:
an adjusting subunit, configured to optimize the charging time point and the discharging time point according to the second charging current or the second discharging current, as follows: keeping the sequence of the charging time point and the discharging time point unchanged, and moving the time points of the charging time point and the discharging time point forwards integrally;
the adjustment subunit is further configured to adjust, according to a current requirement in a preset active balancing requirement, the first charging current of the to-be-charged battery cell and the first discharging current of the to-be-discharged battery cell, to: and extracting the single batteries which do not meet the current requirement in the single batteries to be charged and the single batteries to be discharged, and reducing the first charging current or the first discharging current of the single batteries which do not meet the current requirement until the current requirement in the preset active equalization requirement is met.
In this embodiment, if the unsatisfied factor is a time factor, i.e., the time is too long, the charging and discharging current needs to be properly increased, and the charging time point and the discharging time point are reasonably adjusted according to the increased charging and discharging current to meet the requirement of reducing the charging time, thereby ensuring the charging and discharging safety.
In this embodiment, if the unsatisfied factor is the charging current factor, that is, the charging current is too high, the charging current needs to be reduced, and after the charging current is reduced, the charging safety is ensured.
The beneficial effect of above-mentioned design is: by evaluating the active equalization strategy, the active equalization strategy is timely adjusted when the requirement is not met, the actual application effect of the active equalization strategy is ensured, and finally the charging and discharging efficiency of the whole battery pack can be improved.
Example 9
Based on embodiment 1, an embodiment of the present invention provides a distributed BMS active equalization management system, wherein the monitoring module includes:
the monitoring unit is used for monitoring the temperature value and the environment humidity value of the single battery in the active equalization process;
the reminding unit is used for judging whether the temperature value of the single battery is larger than a preset temperature value or not;
if so, performing first alarm reminding;
otherwise, not carrying out alarm reminding and keeping the dynamic balance process;
the reminding unit is also used for judging whether the environment humidity value of the single battery is larger than a first preset humidity value or smaller than a second preset humidity value, wherein the first humidity value is larger than the second humidity value;
if the humidity value is larger than the first preset humidity value, second alarm reminding is carried out;
if the humidity value is smaller than the second preset humidity value, third alarm reminding is carried out;
otherwise, not carrying out alarm reminding and keeping the dynamic balance process;
the adjusting unit is used for determining a target single battery, reducing the charging and discharging current of the target single battery, starting a cooling module to cool the target single battery, and recovering the charging current or the discharging current of the target single battery when the temperature value of the target single battery is reduced to be smaller than the preset temperature value when the first alarm prompt is received;
the adjusting unit is further configured to stop the active equalization process of the whole battery pack when the second alarm prompt is received, start the dehumidification module to dehumidify the environment, and resume the active equalization process of the whole battery pack until the environment humidity value is smaller than a first preset humidity value;
the adjusting unit is further used for stopping the active equalization process of the whole battery pack when the third alarm prompt is received, starting the cooling module to perform cooling and humidifying treatment on the whole battery pack until the ambient humidity value is greater than a second preset humidity value, and recovering the active equalization process of the whole battery pack.
In this embodiment, the temperature monitoring of the single battery can prevent damage to the battery due to an excessively high battery temperature during the charging process, and prevent a fire caused by burning out the battery II.
In this embodiment, the single battery is monitored for the environmental humidity, so that the damage to the performance of the single battery in the charging and discharging process due to the overhigh environmental humidity can be prevented, and meanwhile, the fire possibly caused by the overlow environmental humidity can be prevented.
In this embodiment, if the target single battery is a battery to be charged, the charging current corresponds to the target single battery; and if the target single battery is the battery to be discharged, corresponding to the discharge current.
The beneficial effect of above-mentioned design is: the temperature value and the environment humidity value of the single battery in the active equalization process are monitored, so that the active equalization process is safely and effectively carried out.
Example 10
Based on embodiment 9, the embodiment of the invention provides a distributed BMS battery active equalization management system, and the cooling module includes two modes, one is a cooling mode and the other is a cooling and humidifying mode.
The beneficial effect of above-mentioned design is: two modes are set through the cooling module and are used in different scenes, and the safety and effectiveness of the active equalization process are guaranteed.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such 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 such modifications and variations.

Claims (8)

1. A distributed BMS battery active equalization management system, comprising:
the acquisition module is used for acquiring the overall voltage of a battery pack and the voltage of each single battery in the battery pack;
the control module is used for setting an active equalization strategy of each single battery according to the acquired voltage of the acquisition module and controlling each single battery to charge or discharge according to the active equalization strategy;
the monitoring module is used for monitoring the external environment of each single battery in the active equalization process and adjusting the active equalization process according to the monitoring result;
the control module includes:
the setting unit is used for acquiring the total voltage of the battery pack and the voltage value of each single battery, determining the difference between the total voltage of the battery pack and the sum of the voltage values of all the single batteries, and correcting the average voltage value of all the single batteries according to the difference to obtain a reference voltage value; the battery pack is formed by connecting a plurality of single batteries in series;
a judging unit for judging whether the voltage value of each single battery is smaller than the reference voltage value;
if so, determining the corresponding single battery as a single battery to be charged;
otherwise, judging whether the voltage value of each single battery is larger than a preset voltage value or not;
if yes, determining the corresponding single battery as a single battery to be discharged;
otherwise, determining that the corresponding single battery does not participate in active balancing;
wherein the reference voltage value is smaller than a preset voltage value;
the state determining unit is used for determining the health state of each single battery according to the charge and discharge records of each single battery;
the strategy determining unit is used for determining the charging or discharging time and the charging or discharging current of the single battery to be charged and the single battery to be discharged according to the health state of each single battery to obtain an active equalization strategy;
the control unit is used for controlling the charging and discharging unit to charge or discharge the single battery according to the active equalization strategy;
the policy determination unit includes:
the dividing subunit is used for carrying out grade division on the single batteries according to the health state of each single battery and determining the grades of the single batteries to be charged and the single batteries to be discharged according to the grade division result;
the distribution subunit is used for distributing a first charging current for the single battery to be charged and distributing a first discharging current for the single battery to be discharged according to the grades of the single battery to be charged and the single battery to be discharged;
the distribution subunit is further configured to determine a first charging time or a first discharging time according to the difference between the preset voltage value and the single battery to be charged and the preset voltage value and the distributed first charging current or first discharging current;
the judging subunit is used for judging whether the external power supply is needed according to the total charging amount of all the single batteries to be charged and the total discharging amount of the single batteries to be discharged;
if so, adding an external power supply for power supply in the active balancing process;
otherwise, in the active balancing process, no external power supply is added for power supply;
the setting subunit is used for acquiring the arrangement positions of the single batteries to be charged and the single batteries to be discharged in the battery pack, and setting a charging time point and a discharging time point for each single battery and a time point for supplying power by an external power supply according to the charging time and the charging efficiency of the single batteries to be charged and the discharging time and the discharging efficiency of the single batteries to be discharged;
the detection subunit is used for obtaining a preliminary active equalization strategy according to the first charging current, the first charging time and the charging time point of the single battery to be charged and the first discharging current, the first discharging time and the discharging time point of the single battery to be discharged, inputting the active equalization strategy into a preset strategy evaluation model to obtain an evaluation result, and judging whether the evaluation result meets the preset active equalization requirement;
if so, determining the preliminary active equalization strategy as a final active equalization strategy;
otherwise, analyzing the evaluation result to determine that the evaluation result does not meet the factors;
if the unsatisfied factor is a time factor, adjusting the first charging current of the single battery to be charged or the first discharging current of the single battery to be discharged according to the time requirement in a preset active equalization requirement to obtain a second charging current or a second discharging current, optimizing the charging time point and the discharging time point according to the second charging current or the second discharging current, and obtaining an adjusted active equalization strategy as a final active equalization strategy;
and if the unsatisfied factor is a charging current factor, adjusting the first charging current of the single battery to be charged and the first discharging current of the single battery to be discharged according to the current requirement in the preset active equalization requirement, and taking the adjusted active equalization strategy as a final active equalization strategy.
2. The active balancing management system for distributed BMS batteries according to claim 1, characterized in that said acquisition module comprises:
the voltage acquisition unit is used for acquiring the voltage of the battery pack and each single battery in the battery pack to acquire an acquisition signal;
the signal adjusting unit is used for filtering the acquired signals, acquiring abnormal signals in the acquired signals, acquiring the difference between an acquisition channel of the voltage acquisition unit in the acquisition process and a preset standard signal acquisition channel, and setting an acquisition error based on the difference;
the signal adjusting unit is further configured to determine an adjusting coefficient by using the acquisition error based on the standard acquisition signal acquired in the preset standard signal acquisition channel, and adjust the acquisition signal according to the adjusting coefficient to obtain a target acquisition signal;
the AD conversion unit is used for carrying out AD conversion on the target acquisition signal, intercepting short pulses of the converted target acquisition signal, acquiring BCD codes corresponding to the short pulses, and sequentially reading the BCD codes corresponding to the short pulses to obtain voltage digital signals;
and the display unit is used for obtaining the total voltage of the battery pack and the voltage of each single battery in the battery pack according to the voltage digital signal and displaying the total voltage and the voltage.
3. The active balancing management system for distributed BMS batteries according to claim 1, further comprising a communication module connected to the collection module and the control module for transmitting the voltage collected by the collection module to the control module.
4. The distributed BMS battery active equalization management system according to claim 1, characterized in that said status determination unit comprises:
the acquisition subunit is used for acquiring charging or discharging records of the single battery to be charged and the single battery to be discharged within preset historical time, wherein the charging or discharging records comprise charging or discharging times, charging or discharging states, charging or discharging time and charging or discharging temperature;
a setting subunit, configured to determine, according to the charging or discharging state, an initial charge value and a final charge value of each time of charging or discharging the to-be-charged battery cell and the to-be-discharged battery cell, to obtain a charge difference set, determine an index value set based on the charge difference set, and set a first weight to an index value in the index value set according to the charging or discharging time;
the setting subunit is further configured to determine a temperature variation curve of the to-be-charged single battery and the to-be-discharged single battery in each charging or discharging process according to the charging or discharging temperature, analyze the temperature variation curve to obtain a temperature variation amplitude and a temperature average value, and set a second weight for an index value in the index value set based on the temperature variation amplitude and the temperature average value;
the calculating subunit is used for calculating a first health value of each single battery based on the first weight and the second weight of the index value set;
the obtaining subunit is further configured to obtain a change degree of an upper limit charging value of each single battery in each charging process, and determine a charging decay coefficient of each single battery based on the change degree of the upper limit charging value;
the obtaining subunit is further configured to obtain a discharge rate change condition of each single battery in a discharge process, and determine a discharge attenuation coefficient of each single battery based on the discharge rate change condition;
the obtaining subunit is further configured to obtain a battery internal resistance change condition of each single battery after the charging and discharging are completed, and determine an internal resistance increase coefficient of each single battery based on the battery internal resistance change condition;
the calculating subunit is further configured to calculate a second health value of each single battery according to the charge attenuation coefficient, the discharge attenuation coefficient, and the internal resistance increase coefficient of each single battery;
and the determining subunit is used for determining the state of health of each single battery according to the first health value and the second health value of each single battery.
5. The distributed BMS battery active equalization management system according to claim 4, characterized in that said determining sub-unit comprises:
a first determining subunit, configured to determine an overall health value of each of the unit batteries according to the first health value and the second health value;
the comparison subunit is used for comparing the overall health value with a preset health value range;
if the overall health value is larger than the preset health value range, determining that the health state of the corresponding single battery is excellent;
if the total health value is within the preset health value range, determining that the health state of the corresponding single battery is good;
and if the total health value is smaller than the set health value range, determining the health state of the corresponding single battery to be qualified.
6. The active equalization management system for distributed BMS batteries according to claim 1, wherein said detecting subunit comprises:
an adjusting subunit, configured to optimize the charging time point and the discharging time point according to the second charging current or the second discharging current, as follows: keeping the sequence of the charging time point and the discharging time point unchanged, and moving the time points of the charging time point and the discharging time point forwards integrally;
the adjustment subunit is further configured to adjust, according to a current requirement in a preset active balancing requirement, the first charging current of the to-be-charged battery cell and the first discharging current of the to-be-discharged battery cell, to: and extracting the single batteries which do not meet the current requirement in the single batteries to be charged and the single batteries to be discharged, and reducing the first charging current or the first discharging current of the single batteries which do not meet the current requirement until the current requirement in the preset active equalization requirement is met.
7. The system of claim 1, wherein the monitoring module comprises:
the monitoring unit is used for monitoring the temperature value and the environment humidity value of the single battery in the active equalization process;
the reminding unit is used for judging whether the temperature value of the single battery is larger than a preset temperature value or not;
if so, performing first alarm reminding;
otherwise, not carrying out alarm reminding and keeping the dynamic balance process;
the reminding unit is also used for judging whether the environment humidity value of the single battery is larger than a first preset humidity value or smaller than a second preset humidity value, wherein the first preset humidity value is larger than the second preset humidity value;
if the humidity value is larger than the first preset humidity value, second alarm reminding is carried out;
if the humidity value is smaller than the second preset humidity value, third alarm reminding is carried out;
otherwise, not carrying out alarm reminding and keeping the dynamic balance process;
the adjusting unit is used for determining a target single battery, reducing the charging and discharging current of the target single battery, starting a cooling module to cool the target single battery, and recovering the charging current or the discharging current of the target single battery when the temperature value of the target single battery is reduced to be smaller than the preset temperature value when the first alarm prompt is received;
the adjusting unit is further used for stopping the active equalization process of the whole battery pack when the second alarm prompt is received, starting a dehumidifying module to dehumidify the environment, and recovering the active equalization process of the whole battery pack when the environment humidity value is smaller than a first preset humidity value;
the adjusting unit is further used for stopping the active equalization process of the whole battery pack when the third alarm prompt is received, starting the cooling module to perform cooling and humidifying treatment on the whole battery pack until the ambient humidity value is greater than a second preset humidity value, and recovering the active equalization process of the whole battery pack.
8. The active equalization management system of claim 7, wherein the cooling module comprises two modes, one is a cooling mode and one is a cooling and humidifying mode.
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