CN106324520B - Battery core capacity calculation methods and system in a kind of electrokinetic cell system based on monitor supervision platform data - Google Patents
Battery core capacity calculation methods and system in a kind of electrokinetic cell system based on monitor supervision platform data Download PDFInfo
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- CN106324520B CN106324520B CN201610792062.XA CN201610792062A CN106324520B CN 106324520 B CN106324520 B CN 106324520B CN 201610792062 A CN201610792062 A CN 201610792062A CN 106324520 B CN106324520 B CN 106324520B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
Abstract
The present invention relates to battery core capacity calculation methods and systems in a kind of electrokinetic cell system based on monitor supervision platform data, are related to battery capacity and calculate field.Solve the problem of that current battery core calculation of capacity process needs to dismantle time-consuming consumption wealth caused by battery pack return factory's test and influences normal use.The present invention provides a kind of practical, effective reliable capacity calculation methods for battery core in lithium-ion power battery system, pass through electric car monitor supervision platform real-time running data, the capability value for accurately calculating each single battery core in system, can be advanced by the health condition of single battery core in electrolytic cell packet.Using Vehicular charger trickle charge charging process, battery core obtains capacity ratio in identical voltage range charging time ratio, and then calculates battery core capability value.It is not necessarily to during calculation of capacity to dismantle battery pack and returns factory's test, it will be able to the accurate capability value for calculating battery core.The cost of least cost is efficiently completed the work of battery core volume calculation by this method, is provided data for after-sales service and is supported.
Description
Technical field
The present invention relates to battery capacities to calculate field.
Background technique
Since winter has set in from 2015, there is preceding institute in the air pollution that China has 33 cities that severe or more has occurred
The serious haze weather not having.Motor vehicle exhaust emission is the primary arch-criminal for causing haze weather, therefore widelys popularize new energy skill
Art becomes the important development direction curbed environmental pollution.Electric car industry is quickly grown in new energy field at present.Power
Heart of the battery system as electric car, performance quality directly influence vehicle performance and the manipulation sense of driver.Due to
Complicated preparation process makes battery core there are inconsistency, temperature difference, oscillation degree, connection impedance etc. in system in use process
Factor will also result in the inconsistency of battery core capacity attenuation, so battery system " short -board effect " will occur in use.In electricity
In cell system charge and discharge process, " filling height to lower " phenomenon will occur in the most fast battery core that decays, limit the energy of entire battery system
It plays.Therefore it should be understood that in system battery core real time capacity value, system occur capacity it is relatively low before in time carry out after-sales service,
The best performance for keeping battery system, increases customer satisfaction degree.
It is currently understood that battery core capability value can by actual measurement, need to disassemble battery system from vehicle, return factory into
Row charge-discharge test can also be estimated that the evaluation method developed at present is all based on one by some capacity estimation methods
Determine measured data progress, also needs disassembly battery pack and return factory's test.Above method is time-consuming consumption wealth, also will affect car owner's
Normal use.
Summary of the invention
Technical problem to be solved by the invention is to provide electric in a kind of electrokinetic cell system based on monitor supervision platform data
Core capacity calculation methods and system.Purpose is to solve traditional battery core calculation of capacity process at present and needs to dismantle battery pack to be returned
Time-consuming the problem of consuming wealth, influencing normal use caused by factory's test.
The technical scheme to solve the above technical problems is that a kind of power battery system based on monitor supervision platform data
Battery core capacity calculation methods in system, which comprises
S1, standard charge and discharge data are obtained by carrying out charge-discharge test to battery pack, it will be same with battery core in battery pack
The battery core that batch is produced carries out charge-discharge test as standard battery cell and obtains temperature correction coefficient a, and is uploaded to monitor supervision platform；
S2, the real time charging data that battery pack in vehicle operation is periodically screened in monitor supervision platform；
S3, all electricity in battery pack are calculated according to standard charge and discharge data, temperature correction coefficient a and real time charging data
The capacity Q of core.
The beneficial effects of the present invention are: the present invention provides for battery core in lithium-ion power battery system, one kind is practical, has
Reliable capacity calculation methods are imitated, by electric car monitor supervision platform real-time running data, accurately calculate each list in system
The capability value of body battery core can be advanced by the health condition of single battery core in electrolytic cell packet, mention for power battery pack after-sales service
It is provided with force data support, accomplishes to safeguard in advance, client is reduced and complains, increase customer satisfaction degree.
Based on the above technical solution, the present invention can also be improved as follows.
Further, the process of acquisition standard charge and discharge data described in the S1 are as follows: maintain the temperature of battery pack
25 DEG C, standard constant current charge-discharge test is carried out in battery pack factory test, obtains standard charging capability valueAnd standard charging
Time
Further, the acquisition standard charging capability valueWith the standard charging timeProcess are as follows:
S11, it is discharged using 0.5 multiplying power battery pack, until the voltage value of single battery core reaches permission in battery pack
Minimum lower voltage limit；
After S12, battery pack stand 30mi n, current value when using Vehicular charger trickle charge charges to battery pack,
Until the voltage value of single battery core reaches the maximum voltage of permission in battery pack, and records the charging time and filled as standard
The electric time
S13, the capacity absorbed according to charging process obtain standard charging capability value of battery pack under the conditions of 25 DEG C
Beneficial effect using above-mentioned further scheme is: choosing this charging process data and calculates as downstream capacity
Normal data.
Further, the detailed process of the temperature correction coefficient a of standard battery cell is obtained in the S1 are as follows:
S1A, standard battery cell allow charging temperature within the scope of, at interval of 5 DEG C to standard battery cell carry out constant current charge-discharge
Test obtains the test charged capacity value Q ' of standard battery cell under different temperatures, while standard battery cell is maintained 25 DEG C of progress perseverances
Charge-discharge test is flowed, the standard battery cell charged capacity value of the standard battery cell at 25 DEG C is obtained
Test charged capacity value Q ' and standard battery cell charged capacity value under S1B, calculating different temperaturesRatio, obtain
Temperature correction coefficient a under different temperatures.
Further, the test charged capacity value Q ' of standard battery cell and at 25 DEG C under acquisition different temperatures described in S1A
The standard battery cell charged capacity value of lower standard battery cellProcess are as follows:
S1A1, it is discharged using 0.5 multiplying power standard battery cell, until the voltage value of standard battery cell reaches the minimum of permission
Lower voltage limit；
After S1A2, standard battery cell stand 30mi n, current value when using Vehicular charger trickle charge carries out standard battery cell
Charging until the voltage value of standard battery cell reaches the maximum voltage of permission, and records the charging time as test charging
Time t '；
S1A3, the capacity absorbed according to standard battery cell charging process obtain survey of the standard battery cell under condition of different temperatures
Trial charging capability value Q ' and at 25 DEG C standard battery cell standard battery cell charged capacity value
Beneficial effect using above-mentioned further scheme is: testing to obtain filling under different temperatures by this charge data
Capacitance value calculates under different temperatures charged capacity value ratio at charged capacity value and 25 DEG C and then obtains temperature under different temperatures
Calibration factor.
Further, the screening that the real time charging data of battery pack in vehicle operation are periodically screened in monitor supervision platform
Condition are as follows:
During Vehicular charger carries out trickle charge to battery pack, charging starting remaining capacity is 30% hereinafter, charging termination
Remaining capacity is 90% or more；
And Cheng Qian is crossed in trickle charge, the battery pack time of repose for completion of discharging is greater than 30mi n or more.
Further, in calculating battery pack described in S3 the capacity Q of all battery cores process are as follows:
S31, the charging starting voltage value V that all battery cores are obtained in monitor supervision platform1, charge complete voltage value V2And it surveys
Trial charging time t '；
S32, the standard constant current charge-discharge test carried out in the factory test of acquisition battery pack in monitor supervision platform are obtained
Standard charging data obtain in standard charging data from V1To V2Charged capacity value in charging processAnd the charging time
S33, according to test charging time t ' obtained in S31, the charged capacity value obtained in S32And the charging time
And the temperature correction coefficient a under different temperatures is calculated, and the capacity of all battery cores at different temperatures in battery pack is obtained
Beneficial effect using above-mentioned further scheme is: it uses under same charging current value, before and after capacity attenuation, and battery core
In identical voltage region, interior charging time ratio obtains capacity ratio, by the initial capacity value of factory test, and then calculates
The capacity of battery core at a time out.
Another technical solution that the present invention solves above-mentioned technical problem is as follows: a kind of power electric based on monitor supervision platform data
Battery core calculation of capacity system in cell system, the system comprises:
Data acquisition module will be with electricity for obtaining standard charge and discharge data by carrying out charge-discharge test to battery pack
Pond wrap in the battery core produced of the same batch of battery core as standard battery cell carry out charge-discharge test acquisition temperature correction coefficient a, and on
Reach monitor supervision platform；
Monitor supervision platform, for periodically screening the real time charging data of battery pack in vehicle operation；
Capacity calculation module, for being calculated according to standard charge and discharge data, temperature correction coefficient a and real time charging data
The capacity Q of battery core in battery pack.
The present invention provides a kind of practical, effectively reliable calculation of capacity system for battery core in lithium-ion power battery system
System, by electric car monitor supervision platform real-time running data, accurately calculates the capability value of each single battery core in system, can be with
It is advanced by the health condition of single battery core in electrolytic cell packet, force data support is provided with for power battery pack after-sales service, accomplishes
It safeguards in advance, reduces client and complain, increase customer satisfaction degree.
Further, data acquisition module includes:
Standard testing module carries out standard in battery pack factory test for the temperature of battery pack to be maintained 25 DEG C
Constant current charge-discharge test obtains standard charging capability valueWith the standard charging time
Further, standard testing module includes:
Standard discharge module, for being discharged using 0.5 multiplying power battery pack, up to the electricity of single battery core in battery pack
Pressure value reaches the minimum lower voltage limit of permission；
Standard charging module, after standing 30mi n for battery pack, current value when using Vehicular charger trickle charge is to electricity
Chi Bao charges, until the voltage value of single battery core reaches the maximum voltage of permission in battery pack, and records charging
Time is as the standard charging time
Standard charging capability value computing module, the capacity for being absorbed according to charging process obtain battery pack in 25 DEG C of items
Standard charging capability value under part
Beneficial effect using above-mentioned further scheme is: choosing this charging process data and calculates as downstream capacity
Normal data.
Further, data acquisition module further include:
Change test module, within the scope of the charging temperature that standard battery cell allows, at interval of 5 DEG C to standard battery cell into
Row constant current charge-discharge test obtains the test charged capacity value Q ' of standard battery cell and test charging time t ' under different temperatures；
Typical coefficient computing module, for calculating the test charged capacity value Q ' under different temperatures and standard charging capability valueRatio, obtain different temperatures under temperature correction coefficient a.
Further, variation test module includes:
Change discharge module, for discharging using 0.5 multiplying power standard battery cell, until the voltage value of standard battery cell reaches
To the minimum lower voltage limit of permission；
Change charging module, after standing 30mi n for standard battery cell, the current value pair when using Vehicular charger trickle charge
Standard battery cell charges, until the voltage value of standard battery cell reaches the maximum voltage of permission, and records the charging time
As test charging time t '；
Charged capacity value computing module is tested, the capacity for being absorbed according to standard battery cell charging process obtains standard electric
Core under condition of different temperatures test charged capacity value Q ' and at 25 DEG C standard battery cell standard battery cell charged capacity value
Beneficial effect using above-mentioned further scheme is: testing to obtain filling under different temperatures by this charge data
Capacitance value calculates under different temperatures charged capacity value ratio at charged capacity value and 25 DEG C and then obtains temperature under different temperatures
Calibration factor.
Further, monitor supervision platform periodically screens the screening conditions of the real time charging data of battery pack in vehicle operation
Are as follows:
During Vehicular charger carries out trickle charge to battery pack, charging starting remaining capacity is 30% hereinafter, charging termination
Remaining capacity is 90% or more；
And Cheng Qian is crossed in trickle charge, the battery pack time of repose for completion of discharging is greater than 30mi n or more.
Further, capacity calculation module includes:
It tests charge data and obtains module, for obtaining the charging starting voltage value V of all battery cores in monitor supervision platform1、
Charge complete voltage value V2And test charging time t '；
Standard charging data acquisition module, it is permanent for obtaining the standard carried out in battery pack factory test in monitor supervision platform
Charge-discharge test standard charging data obtained are flowed, are obtained in standard charging data from V1To V2Charging in charging process
Capability valueAnd the charging time
Battery core capacity calculation module, for according to test charge data obtain module in obtain test charging time t ',
The charged capacity value obtained in standard charging data acquisition moduleAnd the charging timeAnd the temperature correction under different temperatures
Coefficient a is calculated, and the capacity of all battery cores at different temperatures in battery pack is obtained
Beneficial effect using above-mentioned further scheme is: it uses under same charging current value, before and after capacity attenuation, and battery core
In identical voltage region, interior charging time ratio obtains capacity ratio, by the initial capacity value of factory test, and then calculates
The capacity of battery core at a time out.
Detailed description of the invention
Fig. 1 is the flow chart of battery core capacity calculation methods described in the embodiment of the present invention；
Fig. 2 is acquisition standard charging capability value described in the embodiment of the present inventionWith the standard charging timeFlow chart；
Fig. 3 is the flow chart of the temperature correction coefficient a of acquisition standard battery cell described in the embodiment of the present invention；
Fig. 4 be described in the embodiment of the present invention under acquisition different temperatures the test charged capacity value Q ' of standard battery cell and
The standard battery cell charged capacity value of standard battery cell at 25 DEG CFlow chart；
Fig. 5 is the flow chart of the capacity Q of all battery cores in calculating battery pack described in the embodiment of the present invention；
Fig. 6 is the schematic illustration of battery core calculation of capacity system described in the embodiment of the present invention；
Fig. 7 is the schematic illustration of standard testing module 7 described in the embodiment of the present invention；
Fig. 8 is the schematic illustration of data acquisition module 1 described in the embodiment of the present invention；
Fig. 9 is the schematic illustration of variation test module 8 described in the embodiment of the present invention；
Figure 10 is the schematic illustration of capacity calculation module 3 described in the embodiment of the present invention.
In attached drawing, parts list represented by the reference numerals are as follows:
1, data acquisition module, 2, monitor supervision platform, 3, capacity calculation module, 4, standard discharge module, 5, standard charging mould
Block, 6, standard charging capability value computing module, 7, standard testing module, 8, variation test module, 9, typical coefficient computing module,
10, change discharge module, 11, variation charging module, 12, test charged capacity value computing module, 13, test charge data acquisition
Module, 14, standard charging data acquisition module, 15, battery core capacity calculation module.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
Embodiment 1
As shown in Figure 1, the present embodiment proposes battery core capacity in a kind of electrokinetic cell system based on monitor supervision platform data
Calculation method, which comprises
S1, standard charge and discharge data are obtained by carrying out charge-discharge test to battery pack, it will be same with battery core in battery pack
The battery core that batch is produced carries out charge-discharge test as standard battery cell and obtains temperature correction coefficient a, and is uploaded to monitor supervision platform；
S2, the real time charging data that battery pack in vehicle operation is periodically screened in monitor supervision platform；
S3, all electricity in battery pack are calculated according to standard charge and discharge data, temperature correction coefficient a and real time charging data
The capacity Q of core.
The present embodiment provides a kind of practical, effectively reliable calculation of capacity side for battery core in lithium-ion power battery system
Method accurately calculates the capability value of each single battery core in system by electric car monitor supervision platform real-time running data, can be with
It is advanced by the health condition of single battery core in electrolytic cell packet, force data support is provided with for power battery pack after-sales service, accomplishes
It safeguards in advance, reduces client and complain, increase customer satisfaction degree.
The present embodiment be based on vehicle real-time running data on monitor supervision platform, using Vehicular charger trickle charge charging process,
Battery core obtains capacity ratio in identical voltage range charging time ratio, and then calculates battery core capability value.Calculation of capacity process
In without dismantling battery pack return factory's test, it will be able to the accurate capability value for calculating battery core.This method is high by the cost of least cost
Effect completes the work of battery core volume calculation, provides data for after-sales service and supports.
Preferably, as shown in Fig. 2, the process of acquisition standard charge and discharge data described in the S1 are as follows: by battery pack
Temperature maintains 25 DEG C, carries out standard constant current charge-discharge test in battery pack factory test, obtains standard charging capability value
With the standard charging time
As shown in figure 3, the acquisition standard charging capability valueWith the standard charging timeProcess are as follows:
S11, it is discharged using 0.5 multiplying power battery pack, until the voltage value of single battery core reaches permission in battery pack
Minimum lower voltage limit；
After S12, battery pack stand 30mi n, current value when using Vehicular charger trickle charge charges to battery pack,
Until the voltage value of single battery core reaches the maximum voltage of permission in battery pack, and records the charging time and filled as standard
The electric time
S13, the capacity absorbed according to charging process obtain standard charging capability value of battery pack under the conditions of 25 DEG C
For above preferred embodiment by the way that one section of charge-discharge test is added in battery pack factory test, discharge flow path is 0.5C
The minimum lower voltage limit that single battery core voltage value reaches permission is discharged into, is charged after standing 30mi n, charging flow is using vehicle
Current value when carrying charger trickle charge is charged to the maximum voltage that body battery core voltage value reaches permission.This charged
Journey, battery pack temperature need to maintain 25 DEG C, and choose the data of this charging process, the criterion numeral as downstream capacity estimation
According to.
Preferably, as shown in Fig. 2, obtaining the detailed process of the temperature correction coefficient a of standard battery cell in the S1 are as follows:
S1A, standard battery cell allow charging temperature within the scope of, at interval of 5 DEG C to standard battery cell carry out constant current charge-discharge
Test obtains the test charged capacity value Q ' of standard battery cell under different temperatures, while standard battery cell is maintained 25 DEG C of progress perseverances
Charge-discharge test is flowed, the standard battery cell charged capacity value of the standard battery cell at 25 DEG C is obtained
Test charged capacity value Q ' and standard battery cell charged capacity value under S1B, calculating different temperaturesRatio, obtain
Temperature correction coefficient a under different temperatures.
As shown in figure 4, the test charged capacity value Q ' of standard battery cell and 25 under acquisition different temperatures described in S1A
The standard battery cell charged capacity value of standard battery cell at DEG CProcess are as follows:
S1A1, it is discharged using 0.5 multiplying power standard battery cell, until the voltage value of standard battery cell reaches the minimum of permission
Lower voltage limit；
After S1A2, standard battery cell stand 30mi n, current value when using Vehicular charger trickle charge carries out standard battery cell
Charging until the voltage value of standard battery cell reaches the maximum voltage of permission, and records the charging time as test charging
Time t '；
S1A3, the capacity absorbed according to standard battery cell charging process obtain survey of the standard battery cell under condition of different temperatures
Trial charging capability value Q ' and at 25 DEG C standard battery cell standard battery cell charged capacity value
In above preferred embodiment, select with the battery core of same batch in battery pack as standard battery cell, in standard battery cell
Allow within the scope of charging temperature, at interval of charge-discharge test of 5 DEG C of progress.Discharge flow path is that 0.5C discharges into battery core permission
Minimum lower voltage limit charges after standing 30mi n, and current value when charging flow is using Vehicular charger trickle charge is charged to electricity
The maximum voltage that core allows.Wherein Vehicular charger power is generally 6.6KW, be according to vehicle actual voltage value and battery
Battery core building form determines the current value of single battery core in system.The charged capacity value under different temperatures is obtained by test, is counted
The ratio for calculating charged capacity value at charged capacity value and 25 DEG C under different temperatures, using this ratio as temperature correction under different temperatures
Coefficient, wherein the temperature correction coefficient at 25 DEG C is 1.
The present embodiment uses nearby principle when charge and discharge data are chosen at different temperatures, for example, at 30 DEG C and 35
DEG C charge-discharge test has been carried out respectively, if that the temperature correction coefficient for going for 32 DEG C at this time then uses 30 DEG C of number
According to 33 DEG C of temperature correction coefficient then uses 35 DEG C of data.
Preferably, the screening that the real time charging data of battery pack in vehicle operation are periodically screened in monitor supervision platform
Condition are as follows:
During Vehicular charger carries out trickle charge to battery pack, charging starting remaining capacity is 30% hereinafter, charging termination
Remaining capacity is 90% or more；
And Cheng Qian is crossed in trickle charge, the battery pack time of repose for completion of discharging is greater than 30mi n or more.
The periodically real time data that vehicle is run on downloading monitor supervision platform, by taking one month period as an example.Screening meets capacity
The charge data of design conditions, screening conditions are as follows:
1, the trickle charge process of certain Vehicular charger is chosen, the SOC difference for start-stop of this time charging is big as far as possible, for phosphorus
The battery core of sour iron lithium system, charging starting SOC is 30% hereinafter, charging terminates SOC 90% or more；
2, before this time trickle charge, the time of repose after electric discharge is long as far as possible, is at least greater than 30mi n or more.
Preferably, as shown in figure 5, in calculating battery pack described in S3 the capacity Q of all battery cores process are as follows:
S31, the charging starting voltage value V that all battery cores are obtained in monitor supervision platform1, charge complete voltage value V2And it surveys
Trial charging time t '；
S32, the standard constant current charge-discharge test carried out in the factory test of acquisition battery pack in monitor supervision platform are obtained
Standard charging data obtain in standard charging data from V1To V2Charged capacity value in charging processAnd the charging time
S33, according to test charging time t ' obtained in S31, the charged capacity value obtained in S32And the charging time
And the temperature correction coefficient a under different temperatures is calculated, and the capacity of all battery cores at different temperatures in battery pack is obtained
By taking certain meets the charging process of calculation of capacity condition as an example, calculation of capacity is carried out to wherein X battery core, for X
Number battery core, the starting voltage value that this time charges is V1, charge complete voltage value is V2, the test charging time is t ', and charging process is average
Temperature is T.In the standard charging data of battery pack factory test, charging process is found from V1To V2Mark in charging process
Quasi- charged capacity valueWith the standard charging timeDue to charging capacity Q=It, if I 1=I2, Q1/Q2=t1/t2.If
Know Q1 and t1/t2 ratio, Q2 can be obtained.Based on principles above, the present embodiment is using under same charging current value, and capacity declines
Subtract front and back, battery core obtains capacity ratio in the interior charging time ratio in identical voltage region, passes through the initial capacity of factory test
Value, and then battery core is calculated in the capacity at a certain temperature moment.
Embodiment 2
As shown in fig. 6, the present embodiment proposes battery core capacity in a kind of electrokinetic cell system based on monitor supervision platform data
Computing system, the system comprises:
Data acquisition module 1 will be with electricity for obtaining standard charge and discharge data by carrying out charge-discharge test to battery pack
Pond wrap in the battery core produced of the same batch of battery core as standard battery cell carry out charge-discharge test acquisition temperature correction coefficient a, and on
Reach monitor supervision platform 2；
Monitor supervision platform 2, for periodically screening the real time charging data of battery pack in vehicle operation；
Capacity calculation module 3, based on according to standard charge and discharge data, temperature correction coefficient a and real time charging data
Calculate the capacity Q of battery core in battery pack.
The present embodiment provides a kind of practical, effectively reliable calculation of capacity system for battery core in lithium-ion power battery system
System, by 2 real-time running data of electric car monitor supervision platform, accurately calculates the capability value of each single battery core in system, can
To be advanced by the health condition of single battery core in electrolytic cell packet, it is provided with force data support for power battery pack after-sales service, is done
To safeguarding in advance, reduces client and complain, increase customer satisfaction degree.
The present embodiment be based on vehicle real-time running data on monitor supervision platform, using Vehicular charger trickle charge charging process,
Battery core obtains capacity ratio in identical voltage range charging time ratio, and then calculates battery core capability value.Calculation of capacity process
In without dismantling battery pack return factory's test, it will be able to the accurate capability value for calculating battery core.The system is high by the cost of least cost
Effect completes the work of battery core volume calculation, provides data for after-sales service and supports.
Preferably, as shown in fig. 7, data acquisition module 1 includes:
Standard testing module 7 carries out standard in battery pack factory test for the temperature of battery pack to be maintained 25 DEG C
Constant current charge-discharge test obtains standard charging capability valueWith the standard charging time
As shown in figure 8, standard testing module 7 includes:
Standard discharge module 4, for being discharged using 0.5 multiplying power battery pack, until single battery core in battery pack
Voltage value reaches the minimum lower voltage limit of permission；
Standard charging module 5, after standing 30mi n for battery pack, current value when using Vehicular charger trickle charge is to electricity
Chi Bao charges, until the voltage value of single battery core reaches the maximum voltage of permission in battery pack, and records charging
Time is as the standard charging time
Standard charging capability value computing module 6, the capacity for being absorbed according to charging process obtain battery pack at 25 DEG C
Under the conditions of standard charging capability value
For above preferred embodiment by the way that one section of charge-discharge test is added in battery pack factory test, discharge flow path is 0.5C
The minimum lower voltage limit that single battery core voltage value reaches permission is discharged into, is charged after standing 30mi n, charging flow is using vehicle
Current value when carrying charger trickle charge is charged to the maximum voltage that body battery core voltage value reaches permission.This charged
Journey, battery pack temperature need to maintain 25 DEG C, and choose the data of this charging process, the criterion numeral as downstream capacity estimation
According to.
Preferably, as shown in fig. 7, data acquisition module 1 further include:
Change test module 8, within the scope of the charging temperature that standard battery cell allows, at interval of 5 DEG C to standard battery cell
Constant current charge-discharge test is carried out, the test charged capacity value Q ' of standard battery cell under different temperatures is obtained, while standard battery cell being tieed up
It holds in 25 DEG C of progress constant current charge-discharge tests, obtains the standard battery cell charged capacity value of the standard battery cell at 25 DEG C
Typical coefficient computing module 9 charges for calculating the test charged capacity value Q ' under different temperatures and standard battery cell
Capability valueRatio, obtain different temperatures under temperature correction coefficient a.
As shown in figure 9, variation test module 8 includes:
Change discharge module 10, for discharging using 0.5 multiplying power standard battery cell, until the voltage value of standard battery cell
Reach the minimum lower voltage limit of permission；
Change charging module 11, after standing 30mi n for standard battery cell, current value when using Vehicular charger trickle charge
It charges to standard battery cell, when the voltage value of standard battery cell reaches the maximum voltage of permission, and records charging
Between as test charging time t '；
Charged capacity value computing module 12 is tested, the capacity for being absorbed according to standard battery cell charging process obtains standard
Battery core under condition of different temperatures test charged capacity value Q ' and at 25 DEG C standard battery cell standard battery cell charging capacity
Value
In above preferred embodiment, select with the battery core of same batch in battery pack as standard battery cell, in standard battery cell
Allow within the scope of charging temperature, at interval of charge-discharge test of 5 DEG C of progress.Discharge flow path is that 0.5C discharges into battery core permission
Minimum lower voltage limit charges after standing 30mi n, and current value when charging flow is using Vehicular charger trickle charge is charged to electricity
The maximum voltage that core allows.Wherein Vehicular charger power is generally 6.6KW, be according to vehicle actual voltage value and battery
Battery core building form determines the current value of single battery core in system.The charged capacity value under different temperatures is obtained by test, is counted
The ratio for calculating charged capacity value at charged capacity value and 25 DEG C under different temperatures, using this ratio as temperature correction under different temperatures
Coefficient, wherein the temperature correction coefficient at 25 DEG C is 1.
The present embodiment uses nearby principle when charge and discharge data are chosen at different temperatures, for example, at 30 DEG C and 35
DEG C charge-discharge test has been carried out respectively, if that the temperature correction coefficient for going for 32 DEG C at this time then uses 30 DEG C of number
According to 33 DEG C of temperature correction coefficient then uses 35 DEG C of data.
Preferably, monitor supervision platform 2 periodically screens the screening conditions of the real time charging data of battery pack in vehicle operation
Are as follows:
During Vehicular charger carries out trickle charge to battery pack, charging starting remaining capacity is 30% hereinafter, charging termination
Remaining capacity is 90% or more；
And Cheng Qian is crossed in trickle charge, the battery pack time of repose for completion of discharging is greater than 30mi n or more.
The periodically real time data that vehicle is run on downloading monitor supervision platform 2, by taking one month period as an example.Screening meets capacity
The charge data of design conditions, screening conditions are as follows:
1, the trickle charge process of certain Vehicular charger is chosen, the SOC difference for start-stop of this time charging is big as far as possible, for phosphorus
The battery core of sour iron lithium system, charging starting SOC is 30% hereinafter, charging terminates SOC 90% or more；
2, before this time trickle charge, the time of repose after electric discharge is long as far as possible, is at least greater than 30mi n or more.
Preferably, as shown in Figure 10, capacity calculation module 3 includes:
It tests charge data and obtains module 13, for obtaining the charging starting voltage value of all battery cores in monitor supervision platform 2
V1, charge complete voltage value V2And test charging time t '；
Standard charging data acquisition module 14, for obtaining the mark carried out in battery pack factory test in monitor supervision platform 2
Quasi- constant current charge-discharge test standard charging data obtained obtain in standard charging data from V1To V2In charging process
Charged capacity valueAnd the charging time
Battery core capacity calculation module 15, for obtaining the test charging time obtained in module 13 according to test charge data
The charged capacity value obtained in t ', standard charging data acquisition module 14And the charging timeAnd the temperature under different temperatures
Calibration factor a is calculated, and the capacity of all battery cores at different temperatures in battery pack is obtained
By taking certain meets the charging process of calculation of capacity condition as an example, calculation of capacity is carried out to wherein X battery core, for X
Number battery core, the starting voltage value that this time charges is V1, charge complete voltage value is V2, the test charging time is t ', and charging process is average
Temperature is T.In the standard charging data of battery pack factory test, charging process is found from V1To V2Mark in charging process
Quasi- charged capacity valueWith the standard charging timeDue to charging capacity Q=It, if I 1=I2, Q1/Q2=t1/t2.If
Know Q1 and t1/t2 ratio, Q2 can be obtained.Based on principles above, the present embodiment is using under same charging current value, and capacity declines
Subtract front and back, battery core obtains capacity ratio in the interior charging time ratio in identical voltage region, passes through the initial capacity of factory test
Value, and then battery core is calculated in the capacity at a certain temperature moment.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (12)
1. battery core capacity calculation methods in a kind of electrokinetic cell system based on monitor supervision platform data, which is characterized in that the side
Method includes:
S1, standard charge and discharge data are obtained by carrying out charge-discharge test to battery pack, it will be with the same batch of battery core in battery pack
The battery core produced carries out charge-discharge test as standard battery cell and obtains temperature correction coefficient a, and is uploaded to monitor supervision platform；
S2, the real time charging data that battery pack in vehicle operation is periodically screened in monitor supervision platform；
S3, all battery cores in battery pack are calculated according to standard charge and discharge data, temperature correction coefficient a and real time charging data
Capacity Q；
The process of the capacity Q of all battery cores in calculating battery pack described in S3 are as follows:
S31, the charging starting voltage value V that all battery cores are obtained in monitor supervision platform1, charge complete voltage value V2And test is filled
Electric time t '；
S32, the standard constant current charge-discharge test standard obtained carried out in battery pack factory test is obtained in monitor supervision platform
Charge data obtains in standard charging data from V1To V2Charged capacity value in charging processAnd the charging time
S33, according to test charging time t ' obtained in S31, the charged capacity value obtained in S32And the charging timeAnd
Temperature correction coefficient a under different temperatures is calculated, and the capacity of all battery cores at different temperatures in battery pack is obtained
2. battery core calculation of capacity side in a kind of electrokinetic cell system based on monitor supervision platform data according to claim 1
Method, which is characterized in that the process of acquisition standard charge and discharge data described in the S1 are as follows: the temperature of battery pack is maintained 25
DEG C, standard constant current charge-discharge test is carried out in battery pack factory test, obtains standard charging capability valueWhen with standard charging
Between
3. battery core calculation of capacity side in a kind of electrokinetic cell system based on monitor supervision platform data according to claim 2
Method, which is characterized in that obtain standard charging capability valueWith the standard charging timeProcess are as follows:
S11, it is discharged using 0.5 multiplying power battery pack, until the voltage value of single battery core reaches permission most in battery pack
Low voltage limit；
After S12, battery pack stand 30min, current value when using Vehicular charger trickle charge charges to battery pack, until electricity
The voltage value of single battery core reaches the maximum voltage of permission in the packet of pond, and records the charging time as the standard charging time
S13, the capacity absorbed according to charging process obtain standard charging capability value of battery pack under the conditions of 25 DEG C
4. battery core calculation of capacity side in a kind of electrokinetic cell system based on monitor supervision platform data according to claim 2
Method, which is characterized in that the detailed process of the temperature correction coefficient a of standard battery cell is obtained in S1 are as follows:
S1A, standard battery cell allow charging temperature within the scope of, at interval of 5 DEG C to standard battery cell carry out constant current charge-discharge test,
The test charged capacity value Q ' of standard battery cell under different temperatures is obtained, while standard battery cell is maintained into 25 DEG C of progress constant current charge and discharges
Electrical testing obtains the standard battery cell charged capacity value of the standard battery cell at 25 DEG C
Test charged capacity value Q ' and standard battery cell charged capacity value under S1B, calculating different temperaturesRatio, obtain different
At a temperature of temperature correction coefficient a.
5. battery core calculation of capacity side in a kind of electrokinetic cell system based on monitor supervision platform data according to claim 4
Method, which is characterized in that the test charged capacity value Q ' of standard battery cell and at 25 DEG C under acquisition different temperatures described in S1A
The standard battery cell charged capacity value of standard battery cellProcess are as follows:
S1A1, it is discharged using 0.5 multiplying power standard battery cell, until the voltage value of standard battery cell reaches the minimum lower limit of permission
Voltage；
After S1A2, standard battery cell stand 30min, current value when using Vehicular charger trickle charge charges to standard battery cell,
Until the voltage value of standard battery cell reaches the maximum voltage of permission；
S1A3, the capacity absorbed according to standard battery cell charging process obtain test of the standard battery cell under condition of different temperatures and fill
Capacitance value Q ' and at 25 DEG C standard battery cell standard battery cell charged capacity value
6. battery core calculation of capacity side in a kind of electrokinetic cell system based on monitor supervision platform data according to claim 1
Method, which is characterized in that the screening conditions of the real time charging data of battery pack in vehicle operation are periodically screened in monitor supervision platform
Are as follows:
During Vehicular charger carries out trickle charge to battery pack, charging starting remaining capacity is 30% hereinafter, charging termination is remaining
Electricity is 90% or more；
And Cheng Qian is crossed in trickle charge, the battery pack time of repose for completion of discharging is greater than 30min or more.
7. battery core calculation of capacity system in a kind of electrokinetic cell system based on monitor supervision platform data, which is characterized in that the system
System includes:
Data acquisition module (1) will be with battery for obtaining standard charge and discharge data by carrying out charge-discharge test to battery pack
The battery core that the same batch of battery core is produced in wrapping carries out charge-discharge test as standard battery cell and obtains temperature correction coefficient a, and uploads
To monitor supervision platform (2)；
Monitor supervision platform (2), for periodically screening the real time charging data of battery pack in vehicle operation；
Capacity calculation module (3), for being calculated according to standard charge and discharge data, temperature correction coefficient a and real time charging data
The capacity Q of battery core in battery pack；
It tests charge data and obtains module (13), for obtaining the charging starting voltage value of all battery cores in monitor supervision platform (2)
V1, charge complete voltage value V2And test charging time t '；
Standard charging data acquisition module (14), for obtaining the mark carried out in battery pack factory test in monitor supervision platform (2)
Quasi- constant current charge-discharge test standard charging data obtained obtain in standard charging data from V1To V2In charging process
Charged capacity valueAnd the charging time
Battery core capacity calculation module (15), for obtaining the test charging time obtained in module (13) according to test charge data
The charged capacity value obtained in t ', standard charging data acquisition module (14)And the charging timeAnd the temperature under different temperatures
Degree calibration factor a is calculated, and the capacity of all battery cores at different temperatures in battery pack is obtained
8. battery core calculation of capacity system in a kind of electrokinetic cell system based on monitor supervision platform data according to claim 7
System, which is characterized in that data acquisition module (1) includes:
Standard testing module (7) carries out standard perseverance in battery pack factory test for the temperature of battery pack to be maintained 25 DEG C
Charge-discharge test is flowed, standard charging capability value is obtainedWith the standard charging time
9. battery core calculation of capacity system in a kind of electrokinetic cell system based on monitor supervision platform data according to claim 8
System, which is characterized in that standard testing module (7) includes:
Standard discharge module (4), for being discharged using 0.5 multiplying power battery pack, up to the electricity of single battery core in battery pack
Pressure value reaches the minimum lower voltage limit of permission；
Standard charging module (5), after standing 30min for battery pack, current value when using Vehicular charger trickle charge is to battery
Packet charges, when the voltage value of single battery core in battery pack reaches the maximum voltage of permission, and records charging
Between be used as the standard charging time
Standard charging capability value computing module (6), the capacity for being absorbed according to charging process obtain battery pack in 25 DEG C of items
Standard charging capability value under part
10. battery core calculation of capacity system in a kind of electrokinetic cell system based on monitor supervision platform data according to claim 8
System, which is characterized in that data acquisition module (1) further include:
Change test module (8), within the scope of the charging temperature that standard battery cell allows, at interval of 5 DEG C to standard battery cell into
Row constant current charge-discharge test, obtains the test charged capacity value Q ' of standard battery cell under different temperatures, while standard battery cell being maintained
In 25 DEG C of progress constant current charge-discharge tests, the standard battery cell charged capacity value of the standard battery cell at 25 DEG C is obtained
Typical coefficient computing module (9) holds for calculating the test charged capacity value Q ' under different temperatures and standard battery cell charging
MagnitudeRatio, obtain different temperatures under temperature correction coefficient a.
11. battery core calculation of capacity system in a kind of electrokinetic cell system based on monitor supervision platform data according to claim 10
System, which is characterized in that changing test module (8) includes:
Change discharge module (10), for being discharged using 0.5 multiplying power standard battery cell, until the voltage value of standard battery cell reaches
To the minimum lower voltage limit of permission；
Change charging module (11), after standing 30min for standard battery cell, current value when using Vehicular charger trickle charge is to mark
Quasi- battery core charges, until the voltage value of standard battery cell reaches the maximum voltage of permission, and records charging time work
To test charging time t '；
It tests charged capacity value computing module (12), the capacity for being absorbed according to standard battery cell charging process obtains standard electric
Core under condition of different temperatures test charged capacity value Q ' and at 25 DEG C standard battery cell standard battery cell charged capacity value
12. battery core calculation of capacity system in a kind of electrokinetic cell system based on monitor supervision platform data according to claim 7
System, which is characterized in that monitor supervision platform (2) periodically screens the screening conditions of the real time charging data of battery pack in vehicle operation
Are as follows:
During Vehicular charger carries out trickle charge to battery pack, charging starting remaining capacity is 30% hereinafter, charging termination is remaining
Electricity is 90% or more；
And Cheng Qian is crossed in trickle charge, the battery pack time of repose for completion of discharging is greater than 30min or more.
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| CN109471040B (en) * | 2018-10-16 | 2021-06-11 | 深圳市普兰德储能技术有限公司 | Capacity determination method, capacity determination device, electronic device, and computer-readable storage medium |
| CN112946507B (en) * | 2021-02-01 | 2023-10-27 | 中国电力科学研究院有限公司 | Method, system, equipment and storage medium for on-line detection of energy storage battery health status |
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