CN109459704A - A kind of compensating approach method and device of lithium ion battery partial volume capacity - Google Patents
A kind of compensating approach method and device of lithium ion battery partial volume capacity Download PDFInfo
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- CN109459704A CN109459704A CN201811105060.4A CN201811105060A CN109459704A CN 109459704 A CN109459704 A CN 109459704A CN 201811105060 A CN201811105060 A CN 201811105060A CN 109459704 A CN109459704 A CN 109459704A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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Abstract
The present invention is suitable for battery partial volume technical field, provide a kind of compensating approach method and device of lithium ion battery partial volume capacity, the described method includes: under normal temperature, discharge test is carried out to the battery of partial volume combo, simulation obtains workshop battery in the test data of electric discharge original state and end state of discharging；First capacity compensation function of the workshop battery in electric discharge original state and the second capacity compensation function in electric discharge end state are constructed respectively according to the test data；The battery for collecting partial volume combo carries out the capacity of partial volume according to identical work step at different temperatures；According to the partial volume capacity of collection, and it is based on the first capacity compensation function and the second capacity compensation function, the third capacity compensation function that building workshop battery is affected by temperature；According to the first capacity compensation function, the second capacity compensation function and the third capacity compensation function, the partial volume capacity of workshop battery is compensated and corrected, to improve the precision of battery partial volume capacity.
Description
Technical field
The invention belongs to battery partial volume technical field more particularly to a kind of compensating approach sides of lithium ion battery partial volume capacity
Method and device.
Background technique
Capacity is the first attribute of battery, and how more accurately to obtain the capacity of battery is compared in cell production process
Important link.Accurate cubic content measurement is that capacity stepping, low appearance battery effectively identify, produce capacity abnormity early warning etc. and actually answer
Key.Battery partial volume capacity is easy even to be divided by workshop condition temperature fluctuation, formation cabinet Current Voltage exception, battery itself
Hold the influence of work step etc. factor.Therefore, the otherness of workshop battery partial volume data is larger, and capacity is be easy to cause to judge by accident.
Currently, battery capacity, which mainly passes through forming and capacity dividing cabinet, directly obtains the appearance of battery according to actual process forming and capacity dividing
Amount.Specific value is easy to be influenced by battery itself, instrument, environment and partial volume technique.Current raising partial volume capacity accuracy
Method is mainly to keep Environmental Incubator and the better grading system of service precision higher performance with equipment such as air-conditionings.The reality of this two o'clock
Higher cost can be brought to generation by applying, and reduce product competitiveness.That now finds is related to the method for battery capacity amendment and prediction,
It is the prediction and estimation under the premise of volume test is accurate, to capacity under different condition mostly, and workshop complex situations
Lower partial volume leads to the problem of volume error, and the prior art is not studied
Summary of the invention
The embodiment of the present invention provides a kind of compensating approach method of lithium ion battery partial volume capacity, it is intended to solve the prior art
A kind of effective compensating approach method can not be provided, partial volume under the complex situations of workshop is caused to generate volume error.
The embodiments of the present invention are implemented as follows, and the compensating approach method of the lithium ion battery partial volume capacity includes following
Step:
Under normal temperature, discharge test is carried out to the battery of partial volume combo, it is first in electric discharge that simulation obtains workshop battery
The test data of beginning state and electric discharge end state；
According to the test data construct respectively workshop battery electric discharge original state the first capacity compensation function and
Second capacity compensation function of end state of discharging；
The battery for collecting partial volume combo carries out the capacity of partial volume according to identical work step at different temperatures；
According to the partial volume capacity of collection, and it is based on the first capacity compensation function and the second capacity compensation function,
The third capacity compensation function that building workshop battery is affected by temperature；
According to the first capacity compensation function, the second capacity compensation function and the third capacity compensation function,
The partial volume capacity of workshop battery is compensated and corrected.
Further, described under normal temperature, charge-discharge test is carried out to the battery of partial volume combo, simulation obtains
Workshop battery discharge original state and discharge end state test data the step of, specifically include:
The model of balancing battery needed for determining, and obtain the battery of the model of partial volume combo；
Under normal temperature, the interval discharge test of preset capacity is carried out to the battery, makes the equilibrium-like of inter-spike intervals
Morphotype intends the electric discharge original state or electric discharge end state of workshop battery；
The test data when equilibrium state of inter-spike intervals is obtained, as workshop battery in electric discharge original state and electric discharge knot
The test data of pencil state.
Further, the test data include battery voltage and corresponding discharge capacity；
It is described that workshop battery is constructed in the first capacity compensation function of electric discharge original state according to the test data respectively
With discharge end state the second capacity compensation function the step of, specifically include:
Workshop battery is obtained according to the test data to become in the voltage capacity of electric discharge original state and end state of discharging
Change curve；
Function Fitting derivation is carried out to the voltage capacity change curve, obtains workshop battery the of electric discharge original state
One capacity compensation function and electric discharge end state the second capacity compensation function；
The first capacity compensation function are as follows:
y1=ax+b；
The second capacity compensation function are as follows:
Wherein, x is voltage, y1The capacity compensated, y are needed for original state2The capacity that compensates is needed for end state, a,
b、A1、A2For coefficient, ya、t1、t2For fitting parameter.
Further, the partial volume capacity according to collection, and based on the first capacity compensation function and described the
It the step of two capacity compensation functions, the third capacity compensation function that building workshop battery is affected by temperature, specifically includes:
Meter is compensated to the partial volume capacity of collection according to the first capacity compensation function and the second capacity compensation function
It calculates, obtains the capacity volume variance that workshop battery is affected by temperature；
The third capacity compensation function that workshop battery is affected by temperature is constructed according to the capacity volume variance；
The third capacity compensation function are as follows:
y3=A3*F(T-T0)；
Wherein, y3For the capacity for needing to compensate under the influence of temperature, A3For coefficient, T is workshop temperature, T0For normal temperature, F
(T-T0) be temperature T function.
Further, the capacity after the workshop battery compensating approach is y；
Y=y0+(y1+y2+y3)；
Wherein, y0For partial volume capacity, y1The capacity compensated, y are needed for original state2The appearance compensated is needed for end state
Amount, y3For the capacity for needing to compensate under the influence of temperature.
The embodiment of the present invention also provides a kind of compensating approach device of lithium ion battery partial volume capacity, and described device includes:
Test module, for carrying out discharge test to the battery of partial volume combo, simulation obtains workshop under normal temperature
Test data of the battery in electric discharge original state and end state of discharging；
First function constructs module, for constructing workshop battery respectively in electric discharge original state according to the test data
First capacity compensation function and electric discharge end state the second capacity compensation function；
Collection module, the battery for collecting partial volume combo carry out the appearance of partial volume according to identical work step at different temperatures
Amount；
Second function constructs module, for the partial volume capacity according to collection, and based on the first capacity compensation function and
The second capacity compensation function, the third capacity compensation function that building workshop battery is affected by temperature；
Compensating approach module, for according to the first capacity compensation function, the second capacity compensation function and described
Third capacity compensation function compensates and corrects the partial volume capacity of workshop battery.
Further, the test module specifically includes:
Battery acquiring unit for the model of balancing battery needed for determining, and obtains the model of partial volume combo
Battery；
Discharge test unit, for carrying out the interval discharge test of preset capacity to the battery, making under normal temperature
The electric discharge original state or electric discharge end state of the equilibrium state simulation workshop battery of inter-spike intervals；
Data capture unit is being put for obtaining the test data when equilibrium state of inter-spike intervals as workshop battery
The test data of electric original state and electric discharge end state.
Further, the test data include battery voltage and corresponding discharge capacity；
The first function building module specifically includes:
Curve acquisition unit terminates for obtaining workshop battery according to the test data in electric discharge original state and electric discharge
The voltage capacity change curve of state；
Function acquiring unit obtains workshop battery for carrying out Function Fitting derivation to the voltage capacity change curve
The first capacity compensation function in electric discharge original state and the second capacity compensation function in electric discharge end state；
The first capacity compensation function are as follows:
y1=ax+b；
The second capacity compensation function are as follows:
Wherein, x is voltage, y1The capacity compensated, y are needed for original state2The capacity that compensates is needed for end state, a,
b、A1、A2For coefficient, ya、t1、t2For fitting parameter.
Further, the second function building module specifically includes:
Compensation calculation unit, for being divided according to the first capacity compensation function and the second capacity compensation function collection
Hold capacity and compensate calculating, obtains the capacity volume variance that workshop battery is affected by temperature；
Function construction unit, for constructing the third capacity compensation that workshop battery is affected by temperature according to the capacity volume variance
Function；
The third capacity compensation function are as follows:
y3=A3*F(T-T0)；
Wherein, y3For the capacity for needing to compensate under the influence of temperature, A3For coefficient, T is workshop temperature, T0For normal temperature, F
(T-T0) be temperature T function.
Further, the capacity after the workshop battery compensating approach is y；
Y=y0+(y1+y2+y3)；
Wherein, y0For partial volume capacity, y1The capacity compensated, y are needed for original state2The appearance compensated is needed for end state
Amount, y3For the capacity for needing to compensate under the influence of temperature.
In embodiments of the present invention, by the way that the discharge test of the battery of partial volume combo, simulation obtain vehicle under normal temperature
Between battery electric discharge original state and end state of discharging test data, to construct corresponding first capacity compensation function and the
Two capacity compensation functions, and then according to two capacity compensation functions and the partial volume capacity under partial volume combo battery different temperatures,
Influence of the temperature to partial volume capacity is obtained, third capacity compensation function is constructed, thus according to three capacity compensation functions to workshop
The partial volume capacity of battery compensates, to reach the higher capacity supplement amendment of progress.
Detailed description of the invention
Fig. 1 is the implementation process of the compensating approach method for the lithium ion battery partial volume capacity that the embodiment of the present invention one provides
Figure；
Fig. 2 is the structural representation of the compensating approach device of lithium ion battery partial volume capacity provided by Embodiment 2 of the present invention
Figure；
Fig. 3 is that the preferred structure of the compensating approach device of lithium ion battery partial volume capacity provided by Embodiment 2 of the present invention shows
It is intended to.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The present invention by the first capacity compensation function of building workshop battery discharge original state, electric discharge end state the
Third capacity compensation function under the influence of two capacity compensation functions and temperature, compensates the partial volume capacity of workshop battery and repairs
Just, solve the problems, such as that prior art partial volume under the complex situations of workshop generates volume error.
Embodiment one
Fig. 1 shows the realization stream of the compensating approach method of the lithium ion battery partial volume capacity of the offer of the embodiment of the present invention one
Journey, for ease of description, only parts related to embodiments of the present invention are shown, and details are as follows:
In step s101, under normal temperature, discharge test is carried out to the battery of partial volume combo, simulation obtains workshop
Test data of the battery in electric discharge original state and end state of discharging.
In embodiments of the present invention, first according to actual needs, it determines the model of research battery, and obtains having divided for the model
Hold the battery of allocation to rent, preferably 4 to 8 batteries.In turn, in normal temperature, (normal temperature is 25 DEG C, retaining ring under actual conditions
25 ± 2 DEG C of border temperature) under, it is put using the higher test cabinet of precision, and according to battery of certain work step to acquisition
Electrical testing.Wherein, discharge test refers to that full electric battery is discharged to 2.75V with small capacity intervals, and each inter-spike intervals need
It shelves certain time and reaches equilibrium state, the equilibrium state of this inter-spike intervals can be with the different shapes of approximate simulation workshop battery
State can be corresponded with the electric discharge original state and electric discharge end state of workshop battery.
After equilibrium state is corresponding with the electric discharge original state of workshop battery, electric discharge end state, inter-spike intervals are obtained
Test data when equilibrium state can be obtained the survey under its corresponding workshop battery discharge original state, electric discharge end state
Try data.Preferably, test data includes the voltage and discharge capacity under the battery different conditions of workshop.
In step s 102, workshop battery is constructed in the first capacity of electric discharge original state according to the test data respectively
Penalty function and electric discharge end state the second capacity compensation function.
It in embodiments of the present invention, can according to workshop battery in original state of discharging, the test data for end state of discharging
Workshop battery is constructed in the voltage capacity change curve of original state, end state of discharging that discharges.To voltage capacity change curve
Function Fitting derivation is carried out, the higher function of degree of fitting can be determined by auxiliary software, the degree of correlation of fitting function is suggested big
In 99%.It is derived by fitting, obtain workshop battery terminates in the first capacity compensation function of electric discharge original state and in electric discharge
Second capacity compensation function of state.
Wherein, the first capacity compensation function is y1=ax+b,
Second capacity compensation function isx
For voltage, y1The capacity compensated, y are needed for original state2The capacity compensated, a, b, A are needed for end state1、A2For coefficient,
ya、t1、t2For fitting parameter, can be obtained by fitting.
In step s 103, the battery for collecting partial volume combo carries out the appearance of partial volume according to identical work step at different temperatures
Amount.
In embodiments of the present invention, the combo battery 10-20pcs of partial volume for obtaining set model, according to identical partial volume
Work step carries out partial volume in workshop, test room, and partial volume data correspond, and record the temperature of respectively corresponding environment, to obtain
Partial volume capacity of the battery under the different temperatures of workshop.Wherein, preferably workshop [20 DEG C, 40 DEG C] temperature range is surveyed
Examination.
In step S104, according to the partial volume capacity of collection, and it is based on the first capacity compensation function and described second
Capacity compensation function, the third capacity compensation function that building workshop battery is affected by temperature.
In embodiments of the present invention, collection is divided according to the first capacity compensation function and the second capacity compensation function
Hold capacity and compensate calculating, the capacity volume variance that workshop battery is affected by temperature is obtained, to obtain temperature to partial volume capacity
It influences.First capacity compensation function and the second capacity compensation function eliminate a part of measurement error of partial volume capacity collected, so as to
It can be more convenient, accurately influence of the research temperature to partial volume capacity.
And then the third capacity compensation function that workshop battery is affected by temperature is constructed according to the capacity volume variance.According to third
Capacity compensation function can solve influence of the workshop temperature to battery capacity, and to the ranges such as partial volume temperature [20 DEG C, 40 DEG C] into
Quantum chemical method is gone.
Wherein, third capacity compensation function is y3=A3*F(T-T0)。y3For the capacity for needing to compensate under the influence of temperature, A3For
Coefficient, T are workshop temperature, T0For normal temperature, F (T-T0) be temperature T function.
In step s105, according to the first capacity compensation function, the second capacity compensation function and the third
Capacity compensation function compensates and corrects the partial volume capacity of workshop battery.
In embodiments of the present invention, the first capacity compensation function, the second capacity compensation function and third capacity compensation function
Three broad aspects in workshop battery capacity difference source are compensated respectively, therefore combine the virtual condition of workshop battery can structure
Build the correction function of workshop battery capacity.
Wherein, correction function y=y0+(y1+y2+y3).Y is the capacity after compensating approach, y0For partial volume capacity, y1It is first
Beginning state needs the capacity compensated, y2The capacity compensated, y are needed for end state3For the capacity for needing to compensate under the influence of temperature.
Based on workshop partial volume capacity, a calculation procedure is added, the capacity after available battery capacity compensating approach is examined
Consider temperature-compensating, available 25 DEG C of partial volume capacity, therefore the present embodiment can predict the normal capacity of battery.
As shown in table 1, after constructing correction function, using the correction function to the test datas such as workshop, test center into
Row verifying.The dischargeable capacity data of first time test center are the capacity under standard state, second of workshop dischargeable capacity data
It is after being compensated according to correction function to the capacity under standard state, to obtain with third time test center charge/discharge capacity data
Standard state under corresponding capacity.If being compensated according to correction function to the capacity under shop floor status, available vehicle
Between revised capacity under state.By verifying it is found that the present embodiment for workshop battery partial volume capacity carry out cubage correction and
Compensation, effectively improves partial volume capacity accuracy.
Table 1
The present embodiment can construct capacity compensation function respectively correspond the three parts of workshop battery partial volume capacity volume variance into
The amendment of row capacity compensation, adapts to workshop complex environment, achievees the purpose that improve partial volume capacity accuracy；To specific model electricity
Pond carries out the capacity volume variance research of different temperatures and multiplying power, accomplishes the capacity prediction between different temperatures and/or multiplying power, can also answer
For capacity stepping, low appearance battery identification, production capacity abnormity early warning etc.；Data in implementation process determine, need pair
The lot data of specific model battery is counted, and is adjusted determination according to the actual situation, has reached the higher capacity of precision
Compensating approach.
Embodiment two
Fig. 2 shows the structures of the compensating approach device of lithium ion battery partial volume capacity provided by Embodiment 2 of the present invention to show
It is intended to, for ease of description, only parts related to embodiments of the present invention are shown, including: test module 21, the first letter
Number building module 22, collection module 23, second function building module 24 and compensating approach module 25, in which:
Test module 21, for carrying out discharge test to the battery of partial volume combo, simulation obtains vehicle under normal temperature
Between battery electric discharge original state and discharge end state test data.
In embodiments of the present invention, first according to actual needs, it determines the model of research battery, and obtains having divided for the model
Hold the battery of allocation to rent, preferably 4 to 8 batteries.In turn, in normal temperature, (normal temperature is 25 DEG C, retaining ring under actual conditions
25 ± 2 DEG C of border temperature) under, it is put using the higher test cabinet of precision, and according to battery of certain work step to acquisition
Electrical testing.Wherein, discharge test refers to that full electric battery is discharged to 2.75V with small capacity intervals, and each inter-spike intervals need
It shelves certain time and reaches equilibrium state, the equilibrium state of this inter-spike intervals can be with the different shapes of approximate simulation workshop battery
State can be corresponded with the electric discharge original state and electric discharge end state of workshop battery.
After equilibrium state is corresponding with the electric discharge original state of workshop battery, electric discharge end state, inter-spike intervals are obtained
Test data when equilibrium state can be obtained the survey under its corresponding workshop battery discharge original state, electric discharge end state
Try data.Preferably, test data includes the voltage and discharge capacity under the battery different conditions of workshop.
First function constructs module 22, for constructing workshop battery respectively in electric discharge original state according to the test data
The first capacity compensation function and electric discharge end state the second capacity compensation function.
It in embodiments of the present invention, can according to workshop battery in original state of discharging, the test data for end state of discharging
Workshop battery is constructed in the voltage capacity change curve of original state, end state of discharging that discharges.To voltage capacity change curve
Function Fitting derivation is carried out, the higher function of degree of fitting can be determined by auxiliary software, the degree of correlation of fitting function is suggested big
In 99%.It is derived by fitting, obtain workshop battery terminates in the first capacity compensation function of electric discharge original state and in electric discharge
Second capacity compensation function of state.
Wherein, the first capacity compensation function is y1=ax+b,
Second capacity compensation function isx
For voltage, y1The capacity compensated, y are needed for original state2The capacity compensated, a, b, A are needed for end state1、A2For coefficient,
ya、t1、t2For fitting parameter, can be obtained by fitting.
Collection module 23, the battery for collecting partial volume combo carry out partial volume according to identical work step at different temperatures
Capacity.
In embodiments of the present invention, the combo battery 10-20pcs of partial volume for obtaining set model, according to identical partial volume
Work step carries out partial volume in workshop, test room, and partial volume data correspond, and record the temperature of respectively corresponding environment, to obtain
Partial volume capacity of the battery under the different temperatures of workshop.Wherein, preferably workshop [20 DEG C, 40 DEG C] temperature range is surveyed
Examination.
Second function constructs module 24, for the partial volume capacity according to collection, and is based on the first capacity compensation function
With the second capacity compensation function, the third capacity compensation function that workshop battery is affected by temperature is constructed.
In embodiments of the present invention, collection is divided according to the first capacity compensation function and the second capacity compensation function
Hold capacity and compensate calculating, the capacity volume variance that workshop battery is affected by temperature is obtained, to obtain temperature to partial volume capacity
It influences.First capacity compensation function and the second capacity compensation function eliminate a part of measurement error of partial volume capacity collected, so as to
It can be more convenient, accurately influence of the research temperature to partial volume capacity.
And then the third capacity compensation function that workshop battery is affected by temperature is constructed according to the capacity volume variance.According to third
Capacity compensation function can solve influence of the workshop temperature to battery capacity, and to the ranges such as partial volume temperature [20 DEG C, 40 DEG C] into
Quantum chemical method is gone.
Wherein, third capacity compensation function is y3=A3*F(T-T0)。y3For the capacity for needing to compensate under the influence of temperature, A3For
Coefficient, T are workshop temperature, T0For normal temperature, F (T-T0) be temperature T function.
Compensating approach module 25, for according to the first capacity compensation function, the second capacity compensation function and institute
Third capacity compensation function is stated, the partial volume capacity of workshop battery is compensated and corrected.
In embodiments of the present invention, the first capacity compensation function, the second capacity compensation function and third capacity compensation function
Three broad aspects in workshop battery capacity difference source are compensated respectively, therefore combine the virtual condition of workshop battery can structure
Build the correction function of workshop battery capacity.
Wherein, correction function y=y0+(y1+y2+y3).Y is the capacity after compensating approach, y0For partial volume capacity, y1It is first
Beginning state needs the capacity compensated, y2The capacity compensated, y are needed for end state3For the capacity for needing to compensate under the influence of temperature.
Based on workshop partial volume capacity, a calculation procedure is added, the capacity after available battery capacity compensating approach is examined
Consider temperature-compensating, available 25 DEG C of partial volume capacity, therefore the present embodiment can predict the normal capacity of battery.
Wherein, as shown in Figure 3, it is preferable that the test module 21 specifically includes:
Battery acquiring unit 211 for the model of balancing battery needed for determining, and obtains the model of partial volume combo
Battery；
Discharge test unit 212, for discharging the interval that the battery carries out preset capacity and surveying under normal temperature
Examination makes the equilibrium state of inter-spike intervals simulate the electric discharge original state or electric discharge end state of workshop battery；
Data capture unit 213 exists for obtaining the test data when equilibrium state of inter-spike intervals as workshop battery
The test data of original state of discharging and end state of discharging.
The first function building module 22 specifically includes:
Curve acquisition unit 221, for obtaining workshop battery in electric discharge original state and electric discharge according to the test data
The voltage capacity change curve of end state；
Function acquiring unit 222 obtains workshop electricity for carrying out Function Fitting derivation to the voltage capacity change curve
First capacity compensation function of the pond in electric discharge original state and the second capacity compensation function in electric discharge end state；
The first capacity compensation function are as follows:
y1=ax+b；
The second capacity compensation function are as follows:
Wherein, x is voltage, y1The capacity compensated, y are needed for original state2The capacity that compensates is needed for end state, a,
b、A1、A2For coefficient, ya、t1、t2For fitting parameter.
The second function building module 24 specifically includes:
Compensation calculation unit 241 is used for according to the first capacity compensation function and the second capacity compensation function to collection
Partial volume capacity compensate calculating, obtain the capacity volume variance that workshop battery is affected by temperature；
Function construction unit 242, for constructing the third capacity that workshop battery is affected by temperature according to the capacity volume variance
Penalty function；
The third capacity compensation function are as follows:
y3=A3*F(T-T0)；
Wherein, y3For the capacity for needing to compensate under the influence of temperature, A3For coefficient, T is workshop temperature, T0For normal temperature, F
(T-T0) be temperature T function.
The present embodiment can construct capacity compensation function respectively correspond the three parts of workshop battery partial volume capacity volume variance into
The amendment of row capacity compensation, adapts to workshop complex environment, achievees the purpose that improve partial volume capacity accuracy；To specific model electricity
Pond carries out the capacity volume variance research of different temperatures and multiplying power, accomplishes the capacity prediction between different temperatures and/or multiplying power, can also answer
For capacity stepping, low appearance battery identification, production capacity abnormity early warning etc.；Data in implementation process determine, need pair
The lot data of specific model battery is counted, and is adjusted determination according to the actual situation, has reached the higher capacity of precision
Compensating approach.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of compensating approach method of lithium ion battery partial volume capacity, which is characterized in that the described method includes:
Under normal temperature, discharge test is carried out to the battery of partial volume combo, simulation obtains workshop battery in electric discharge initial shape
The test data of state and electric discharge end state；
Workshop battery is constructed respectively in the first capacity compensation function of electric discharge original state according to the test data and is being discharged
Second capacity compensation function of end state；
The battery for collecting partial volume combo carries out the capacity of partial volume according to identical work step at different temperatures；
According to the partial volume capacity of collection, and it is based on the first capacity compensation function and the second capacity compensation function, building
The third capacity compensation function that workshop battery is affected by temperature；
According to the first capacity compensation function, the second capacity compensation function and the third capacity compensation function, to vehicle
Between the partial volume capacity of battery compensate and correct.
2. the compensating approach method of lithium ion battery partial volume capacity as described in claim 1, which is characterized in that described in standard
At a temperature of, charge-discharge test is carried out to the battery of partial volume combo, simulation obtains workshop battery in electric discharge original state and electric discharge
It the step of test data of end state, specifically includes:
The model of balancing battery needed for determining, and obtain the battery of the model of partial volume combo；
Under normal temperature, the interval discharge test of preset capacity is carried out to the battery, makes the equilibrium-like morphotype of inter-spike intervals
The electric discharge original state or electric discharge end state of quasi- workshop battery；
The test data when equilibrium state of inter-spike intervals is obtained, terminates shape in electric discharge original state and electric discharge as workshop battery
The test data of state.
3. the compensating approach method of lithium ion battery partial volume capacity as described in claim 1, which is characterized in that the test number
According to the voltage and corresponding discharge capacity for including battery；
It is described according to the test data construct respectively workshop battery electric discharge original state the first capacity compensation function and
It the step of second capacity compensation function of end state of discharging, specifically includes:
It is bent in the voltage capacity variation of electric discharge original state and end state of discharging that workshop battery is obtained according to the test data
Line；
Function Fitting derivation is carried out to the voltage capacity change curve, obtains workshop battery in the first appearance of electric discharge original state
Measure penalty function and the second capacity compensation function in electric discharge end state；
The first capacity compensation function are as follows:
y1=ax+b；
The second capacity compensation function are as follows:
Wherein, x is voltage, y1The capacity compensated, y are needed for original state2The capacity compensated, a, b, A are needed for end state1、
A2For coefficient, ya、t1、t2For fitting parameter.
4. the compensating approach method of lithium ion battery partial volume capacity as described in claim 1, which is characterized in that described according to receipts
The partial volume capacity of collection, and be based on the first capacity compensation function and the second capacity compensation function, building workshop battery by
It the step of third capacity compensation function that temperature influences, specifically includes:
Calculating is compensated to the partial volume capacity of collection according to the first capacity compensation function and the second capacity compensation function, is obtained
Obtain the capacity volume variance that workshop battery is affected by temperature；
The third capacity compensation function that workshop battery is affected by temperature is constructed according to the capacity volume variance；
The third capacity compensation function are as follows:
y3=A3*F(T-T0)；
Wherein, y3For the capacity for needing to compensate under the influence of temperature, A3For coefficient, T is workshop temperature, T0For normal temperature, F (T-T0)
For the function of temperature T.
5. the compensating approach method of lithium ion battery partial volume capacity as described in claim 1, which is characterized in that the workshop electricity
Capacity after the compensating approach of pond is y；
Y=y0+(y1+y2+y3)；
Wherein, y0For partial volume capacity, y1The capacity compensated, y are needed for original state2The capacity compensated, y are needed for end state3
For the capacity for needing to compensate under the influence of temperature.
6. a kind of compensating approach device of lithium ion battery partial volume capacity, which is characterized in that described device includes:
Test module, for carrying out discharge test to the battery of partial volume combo, simulation obtains workshop battery under normal temperature
In the test data of electric discharge original state and end state of discharging；
First function constructs module, for constructing workshop battery respectively the first of electric discharge original state according to the test data
Capacity compensation function and electric discharge end state the second capacity compensation function；
Collection module, the battery for collecting partial volume combo carry out the capacity of partial volume according to identical work step at different temperatures；
Second function constructs module, for the partial volume capacity according to collection, and based on the first capacity compensation function and described
Second capacity compensation function, the third capacity compensation function that building workshop battery is affected by temperature；
Compensating approach module, for according to the first capacity compensation function, the second capacity compensation function and the third
Capacity compensation function compensates and corrects the partial volume capacity of workshop battery.
7. the compensating approach device of lithium ion battery partial volume capacity as claimed in claim 6, which is characterized in that the test mould
Block specifically includes:
Battery acquiring unit for the model of balancing battery needed for determining, and obtains the battery of the model of partial volume combo；
Discharge test unit, for carrying out the interval discharge test of preset capacity to the battery, making to discharge under normal temperature
The electric discharge original state or electric discharge end state of the equilibrium state simulation workshop battery at interval；
Data capture unit, it is first in electric discharge as workshop battery for obtaining the test data when equilibrium state of inter-spike intervals
The test data of beginning state and electric discharge end state.
8. the compensating approach device of lithium ion battery partial volume capacity as claimed in claim 6, which is characterized in that the test number
According to the voltage and corresponding discharge capacity for including battery；
The first function building module specifically includes:
Curve acquisition unit, for obtaining workshop battery in electric discharge original state and electric discharge end state according to the test data
Voltage capacity change curve；
Function acquiring unit obtains workshop battery and is putting for carrying out Function Fitting derivation to the voltage capacity change curve
First capacity compensation function of electric original state and electric discharge end state the second capacity compensation function；
The first capacity compensation function are as follows:
y1=ax+b；
The second capacity compensation function are as follows:
Wherein, x is voltage, y1The capacity compensated, y are needed for original state2The capacity compensated, a, b, A are needed for end state1、
A2For coefficient, ya、t1、t2For fitting parameter.
9. the compensating approach device of lithium ion battery partial volume capacity as claimed in claim 6, which is characterized in that second letter
Number building module specifically includes:
Compensation calculation unit, for being held according to the first capacity compensation function and the second capacity compensation function to the partial volume of collection
Amount compensates calculating, obtains the capacity volume variance that workshop battery is affected by temperature；
Function construction unit, for constructing the third capacity compensation letter that workshop battery is affected by temperature according to the capacity volume variance
Number；
The third capacity compensation function are as follows:
y3=A3*F(T-T0)；
Wherein, y3For the capacity for needing to compensate under the influence of temperature, A3For coefficient, T is workshop temperature, T0For normal temperature, F (T-T0)
For the function of temperature T.
10. the compensating approach device of lithium ion battery partial volume capacity as claimed in claim 6, which is characterized in that the workshop
Capacity after battery compensating approach is y；
Y=y0+(y1+y2+y3)；
Wherein, y0For partial volume capacity, y1The capacity compensated, y are needed for original state2The capacity compensated, y are needed for end state3
For the capacity for needing to compensate under the influence of temperature.
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