CN105259513B - A kind of geometrical model method for being used to describe battery status - Google Patents
A kind of geometrical model method for being used to describe battery status Download PDFInfo
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- CN105259513B CN105259513B CN201510805823.6A CN201510805823A CN105259513B CN 105259513 B CN105259513 B CN 105259513B CN 201510805823 A CN201510805823 A CN 201510805823A CN 105259513 B CN105259513 B CN 105259513B
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Abstract
Be used to describe the geometrical model method of battery behavior the present invention relates to a kind of, using current axis as abscissa, time shaft is ordinate, by battery under specific current value can the area of discharge time and the specific current value represent the capacity of battery；In the range of battery capacity face, the charge or discharge of battery are represented by the floating of discharge and recharge adjustment axis or float downward, division represents the region for having discharged capacity and current remaining capacity of battery；By the reduction or rise that move to left or move to right expression battery temperature of temperature adjustment axle, division represents that the current of battery freezes capacity and the currently region of usable capacity.Cycle-index axle is further set, to represent decay of the battery total capacity with cycle-index.
Description
Technical field
The present invention relates to technical field of battery management, especially for battery or the SOC of battery pack（State-of-charge）And SOH
（Degradation）A kind of Predicting Technique, there is provided geometrical model method for being used to describe battery status.
Background technology
Electrokinetic cell system is just progressively used widely in the fields such as electric automobile, large-scale energy-storage system.How to have
Effect description battery behavior, assessment battery real-time status are the key technology of electrokinetic cell system in actual applications.Pass through foundation
It is a kind of more feasible means that battery model analyzes prediction battery status with mathematical measure.Current battery model can be divided mainly into
Electrochemical model, equivalent-circuit model, neural network model, specific factor model etc..But because battery behavior influence factor has
There is the characteristics of nonlinearity, therefore battery model in actual applications be present and establish that difficult, the degree of accuracy is low, calculating is complicated, model
It is abstract to be not easy to the problem of engineer understands.
The content of the invention
The present invention propose it is a kind of using geometrical principle carry out battery model description method, be easy to engineer understand and it is easy
In the corresponding assessment of formation, analysis strategy.
In order to achieve the above object, the technical scheme is that providing a kind of geometrical model for being used to describe battery behavior
Method：The battery capacity face established in battery behavior model, by battery under specific current value can discharge time it is specific with this
The area of current value represents the capacity of battery；
In the battery capacity face, coboundary correspond to it is described can discharge time, lower boundary corresponds to be formed with current axis
Abscissa, left margin corresponds to the ordinate that is formed with time shaft, and right margin corresponds to the specific current value；
In the range of the battery capacity face, discharge and recharge adjustment axis and/or temperature adjustment axle are provided with：
The discharge and recharge adjustment axis its floating along time shaft or is floated downward parallel to current axis, charging with battery or is put
Electricity is corresponding；
Parallel to time shaft, it moving to left or moving to right along temperature axis the temperature adjustment axle, reduction with battery temperature or
Raise corresponding；The temperature axis is parallel to the current axis.
Preferably, the result charging and discharging currents of battery integrated by discharge and recharge adjustment axis, in battery capacity face
In mark off respectively represent battery the region for having discharged capacity and current remaining capacity；
The result integrated by change of the temperature adjustment axle to temperature, marks off in battery capacity face and represents respectively
The current region for freezing capacity and current usable capacity of battery.
Preferably, in the range of battery capacity face, the discharge and recharge adjustment axis position above and below is right respectively
The region for having discharged capacity and current remaining capacity of battery should be represented；
In the range of battery capacity face, the temperature adjustment axle position is turned left and turned right, and corresponds to represent electricity respectively
The current region for freezing capacity and current usable capacity in pond.
Preferably, by the cooperation of the discharge and recharge adjustment axis and temperature adjustment axle, marked off in the battery capacity face
Region below：
Represent to correspond to more than discharge and recharge adjustment axis, by discharge and recharge adjustment axis and battery capacity using the region S1 of capacity
The region that upper, the left and right border in face surrounds；
The region S2 of present available capacity is represented, is corresponded to below discharge and recharge adjustment axis, is held by discharge and recharge adjustment axis and battery
Under amount face, the region that left and right border surrounds；
Represent using the region f1 of the undelivered capacity temporarily freezed in capacity, corresponding temperature adjustment axis turns right,
It is more than discharge and recharge adjustment axis, the region that is surrounded by upper, the right margin in temperature adjustment axle, discharge and recharge adjustment axis and battery capacity face；
Represent to be not used the region f2 for the capacity for temporarily freezing to discharge in capacity, corresponding temperature adjustment axis is turned right, filled
Below adjustment axis of discharging, by under temperature adjustment axle, discharge and recharge adjustment axis and battery capacity face, the region that right margin surrounds.
Preferably, the cycle-index axle perpendicular to battery capacity face is set in battery behavior model, with cycle-index axle
On numerical value represent the cycle-index of battery, and with the cross section of the corresponding division of any one numerical value in cycle-index, carry out table
Show the current value and time value when being recycled to the number, so as to by the area of the cross section to represent to be recycled to the number when
Battery total capacity.
Preferably, with it is initial when battery capacity face area and cross section area difference, it is corresponding to represent to be recycled to
The reduction amount of battery capacity during number.
Preferably, discharge and recharge adjustment axis and/or temperature adjustment axle are provided with the range of cross section：
The capacity of release and residual capacity of battery when being recycled to corresponding number by the discharge and recharge adjustment axis to show；
Battery freezes capacity and usable capacity when representing to be recycled to corresponding number by the temperature adjustment axle.
Preferably, the cycle-index of battery, with the temperature factor during battery use, depth of discharge factor, discharge and recharge
Multiplying power factor, calendar life factor are converted to obtain.
The present invention provides a kind of geometrical model method for describing battery behavior.With electrochemical model, equivalent-circuit model, nerve
The common methods such as network model, specific factor model are compared, and there is method of the invention parameter to be easily obtained, and model is easy to build
Vertical, model intuitively readily appreciates, while is easy to the characteristics of embedded MCU carries out computing.
Brief description of the drawings
Fig. 1 is schematic diagram of the geometrical model method in first embodiment that the present invention is used to describe battery behavior；
Fig. 2 is schematic diagram of the geometrical model method in second embodiment that the present invention is used to describe battery behavior.
Embodiment
The present invention relates to a kind of geometrical model method for being used to describe battery behavior, using electric current as horizontal seat in the model of composition
Mark, time are that ordinate establishes a battery capacity face, and the capacity of battery is described by the area in the battery capacity face.
Discharge and recharge adjustment axis can be set on the battery capacity face, using discharge and recharge electricity of the discharge and recharge adjustment axis to battery
Stream is integrated, and obtains adding and subtracting integral result accordingly in a model, you can mark off different regions in battery capacity face
To represent the capacity of the capacity and current residual discharged.
Temperature adjustment axle can be set on the battery capacity face, accumulated using change of the temperature adjustment axle to temperature
Point, obtain adding and subtracting integral result accordingly in a model, you can mark off different regions in battery capacity face to represent to work as
Before the capacity that freezes and current workable capacity.
In a specific example, for 60Ah battery core, with its under specific currents 60A can discharge time
The area of 3600s compositions, to represent the capacity of the battery.In the battery capacity face of foundation, coboundary corresponds to described specific
Under electric current can discharge time（This example is 3600s）, lower boundary corresponds to the abscissa that is formed with current axis, and left margin corresponds to
The ordinate formed with time shaft, right margin correspond to the specific current value（This example is 60A）.
As shown in figure 1, curent change axle AC is provided with battery capacity face（Discharge and recharge adjustment axis）, it is parallel to electric current
Axle（Abscissa）；When battery is charged, AC is along time shaft（Ordinate）Float, when being discharged, AC is along time shaft
Float downward.In the range of battery capacity face, AC axles position above and below, expression is respectively divided out and has discharged capacity and has worked as
The region of preceding residual capacity.
Temperature change axle TC is additionally provided with battery capacity face（Temperature adjustment axle）, it is parallel to time shaft（It is vertical to sit
Mark）；When battery temperature raises, TC is along temperature axis（The temperature axis is parallel to abscissa）Move to right, TC is along temperature when the temperature decreases
Axle moves to left.In the range of battery capacity face, TC axles position is turned left and turned right, and the appearance that expression is currently freezed is respectively divided out
The region of amount and current workable capacity.
By curent change axle AC and temperature change axle TC in this example, from above-mentioned battery capacity mask body mark off S1, S2,
Tetra- groups of regions of f1, f2, comprising：
S1 is expressed as using capacity, and corresponding region is more than AC axles, by the upper, left and right of AC axles and battery capacity face
Border surrounds（S1 is 3000 ~ 3600s in this example, 0 ~ 60A region）；
S2 is expressed as present available capacity, corresponding region below AC axles, by under AC axles and battery capacity face, it is left,
Right margin surrounds（S2 is 0 ~ 3000s in this example, 0 ~ 60A region）；
F1 be expressed as be using the undelivered capacity temporarily freezed in capacity S1 regions a portion, tool
Region corresponding to body is turned right, more than AC axles in TC axles, is surrounded by TC axles, AC axles and upper, the right margin in battery capacity face（In this example
F1 is 3000 ~ 3600s, 50 ~ 60A region）；
F2 is expressed as being not used the capacity for temporarily freezing to discharge in capacity, is a portion in S2 regions, specifically
Corresponding region is turned right, below AC axles in TC axles, by TC axles, AC axles with battery capacity face, right margin surrounds（F2 in this example
For 0 ~ 3000s, 50 ~ 60A region）.
Consider that battery will be decayed with cycle-index on above-mentioned basis, therefore in the model that another embodiment is formed,
It is further introduced into the Z axis for representing cycle-index.The cycle-index of battery, with the temperature factor during battery use, DOD（Put
Electric depth）Factor, charge-discharge magnification factor, calendar life factor are converted.
As shown in Fig. 2 cycle-index axle is set to be obtained perpendicular to battery capacity face to some numerical division on the cycle-index axle
The cross section arrived, the corresponding current value and time value shown when being recycled to the number.Then can be with by the cycle-index of assessment
Current cross-sectional area is evaluated, has also just obtained current battery total capacity.Can further it pass through on each cross section
AC axles（And/or TC axles）, capacity and residual capacity have been discharged accordingly during showing current cycle time（And/or represent corresponding
Freeze capacity and workable capacity）.Illustrate visible, the right margin in battery capacity face is gradual with the increase of cycle-index
Move to left, current values when current values corresponding to the right margin of cross section are less than initial.
In Fig. 2 specific example, battery capacity face when showing initial and electric current 60A and can discharge time 3600s it is corresponding,
And the cross section when being recycled to 2000 times and electric current 50A and can discharge time 3600s it is corresponding, when representing to be recycled to 2000 times
Cross-sectional area has reduced, i.e., battery capacity when battery total capacity at that time is less than initial.Further at 2000 times
In cross section, with the AC axles corresponding to 3000s, the cross section is divided into two regions up and down, expression has discharged appearance accordingly
Amount and residual capacity.
The present invention is provided to describe the geometrical model method of battery status, it is easily obtained with parameter, model is easy to establish,
Model intuitively readily appreciates, while is easy to embedded MCU（Micro-control unit）The characteristics of carrying out computing.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (8)
- A kind of 1. geometrical model method for being used to describe battery behavior, it is characterised in thatThe battery capacity face established in battery behavior model, by battery under specific current value can discharge time it is specific with this The area of current value represents the capacity of battery；In the battery capacity face, coboundary correspond to it is described can discharge time, lower boundary corresponds to the horizontal stroke formed with current axis Coordinate, left margin correspond to the ordinate formed with time shaft, and right margin corresponds to the specific current value；In the range of the battery capacity face, discharge and recharge adjustment axis and/or temperature adjustment axle are provided with：The discharge and recharge adjustment axis its floating along time shaft or is floated downward, the charge or discharge phase with battery parallel to current axis It is corresponding；The temperature adjustment axle is parallel to time shaft, and it moving to left or moving to right along temperature axis, reduction or rise with battery temperature It is corresponding；The temperature axis is parallel to the current axis.
- 2. geometrical model method as claimed in claim 1, it is characterised in thatThe result integrated by discharge and recharge adjustment axis to the charging and discharging currents of battery, difference is marked off in battery capacity face Represent the region for using capacity and unused capacity of battery；The result integrated by change of the temperature adjustment axle to temperature, marks off in battery capacity face and represents battery respectively The current region for freezing capacity and current usable capacity.
- 3. geometrical model method as claimed in claim 1, it is characterised in thatIn the range of battery capacity face, the discharge and recharge adjustment axis position above and below, correspond to represent battery respectively Using the region of capacity and unused capacity；In the range of battery capacity face, the temperature adjustment axle position is turned left and turned right, and corresponds to represent battery respectively The current region for freezing capacity and current usable capacity.
- 4. geometrical model method as claimed in claim 3, it is characterised in thatBy the cooperation of the discharge and recharge adjustment axis and temperature adjustment axle, region below is marked off in the battery capacity face：Represent to use the region S1 of capacity, more than corresponding discharge and recharge adjustment axis, by discharge and recharge adjustment axis and battery capacity face The region that upper, left and right border surrounds；The region S2 of unused capacity is represented, is corresponded to below discharge and recharge adjustment axis, by discharge and recharge adjustment axis and battery capacity face Under, the region that surrounds of left and right border；Represent using the region f1 of the undelivered capacity temporarily freezed in capacity, corresponding temperature adjustment axis is turned right, charge and discharge It is more than electric adjustment axis, the region that is surrounded by upper, the right margin in temperature adjustment axle, discharge and recharge adjustment axis and battery capacity face；Represent to be not used the region f2 for the capacity for temporarily freezing to discharge in capacity, corresponding temperature adjustment axis is turned right, discharge and recharge Below adjustment axis, by under temperature adjustment axle, discharge and recharge adjustment axis and battery capacity face, the region that right margin surrounds.
- 5. the geometrical model method as described in any one in claim 1 ~ 4, it is characterised in thatCycle-index axle perpendicular to battery capacity face is set in battery behavior model, represented with the numerical value on cycle-index axle The cycle-index of battery, and with the cross section of the corresponding division of any one numerical value in cycle-index, to represent to be recycled to this time Current value and time value during number, so as to represent battery total capacity when being recycled to the number by the area of the cross section.
- 6. geometrical model method as claimed in claim 5, it is characterised in thatWith it is initial when battery capacity face area and cross section area difference, battery holds during representing to be recycled to corresponding number The reduction amount of amount.
- 7. geometrical model method as claimed in claim 5, it is characterised in thatDischarge and recharge adjustment axis and/or temperature adjustment axle are provided with the range of cross section：The capacity of release and residual capacity of battery when being recycled to corresponding number by the discharge and recharge adjustment axis to show；Pass through Battery freezes capacity and usable capacity when the temperature adjustment axle represents to be recycled to corresponding number.
- 8. geometrical model method as claimed in claim 5, it is characterised in thatThe cycle-index of battery, with the temperature factor during battery use, depth of discharge factor, charge-discharge magnification factor, day Factors of limit life is gone through to be converted to obtain.
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| CN201510805823.6A CN105259513B (en) | 2015-11-20 | 2015-11-20 | A kind of geometrical model method for being used to describe battery status |
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| CN201510805823.6A CN105259513B (en) | 2015-11-20 | 2015-11-20 | A kind of geometrical model method for being used to describe battery status |
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| CN106093778B (en) * | 2016-05-30 | 2018-12-04 | 浙江南都电源动力股份有限公司 | Battery status prediction technique and system |
| CN110082686A (en) * | 2019-04-16 | 2019-08-02 | 中国汽车技术研究中心有限公司 | A method of measurement ternary lithium-ion-power cell overcharges electrical boundary condition |
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| US7109685B2 (en) * | 2003-09-17 | 2006-09-19 | General Motors Corporation | Method for estimating states and parameters of an electrochemical cell |
| US8332342B1 (en) * | 2009-11-19 | 2012-12-11 | The United States of America as represented by the Administrator of the National Aeronautics & Space Administration (NASA) | Model-based prognostics for batteries which estimates useful life and uses a probability density function |
| CN103257323B (en) * | 2013-06-03 | 2016-03-23 | 清华大学 | A kind of method of estimation of lithium ion battery residue utilisable energy |
| CN103852727B (en) * | 2014-02-14 | 2017-04-12 | 清华大学深圳研究生院 | Online estimation method and device for state of charge of power battery |
| CN104036128A (en) * | 2014-06-06 | 2014-09-10 | 哈尔滨工业大学深圳研究生院 | Battery SOC (State Of Charge) estimation method based on filter current |
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