CN107656215A - A kind of battery functi on method for diagnosing status based on constant current mode impedance spectrum - Google Patents
A kind of battery functi on method for diagnosing status based on constant current mode impedance spectrum Download PDFInfo
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- CN107656215A CN107656215A CN201711104887.9A CN201711104887A CN107656215A CN 107656215 A CN107656215 A CN 107656215A CN 201711104887 A CN201711104887 A CN 201711104887A CN 107656215 A CN107656215 A CN 107656215A
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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]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
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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]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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Abstract
The invention discloses a kind of battery functi on method for diagnosing status based on constant current mode impedance spectrum, the diagnostic method comprises the following steps：Step 1：Energy-storage battery is overcharged or crossed and is put, constant current mode impedance spectrum is gathered, obtains ac current signal amplitude and bias current value；Step 2：Pass through the battery equivalent circuit model under constant current mode, parser circuitry parametric device value；Step 3：Analytic statistics equivalent circuit parameter, battery functi on state is diagnosed；The present invention uses constant current impedance method, by lower adjustment ac current signal amplitude, bias current value, the ac current signal amplitude suitable for energy-storage battery, bias current value are obtained, and then constant current impedance exploration is carried out to battery, by equivalent circuit parameter, battery functi on state is diagnosed.
Description
Technical field
The present invention relates to energy-storage battery technical field, more particularly to the battery functi on state based on constant current mode impedance spectrum
Diagnostic method.
Background technology
Resource increasingly exhaustion now, develop green clean energy resource and be particularly important.Lithium ion battery is as a kind of energy
Storage and output system, it has also become the indispensable part of electronic product, and also more important point is lithium ion battery
It is the most possible power source for substituting oil and turning into automobile, this is to reducing dependence and reduction pollutant of the automobile to petroleum-based energy
Discharge important in inhibiting.From the point of view of the development trend in future, lithium ion battery has broad application prospects.And lithium ion
There is consistent sex differernce in the performance of battery, be that performance indications do not reach monocell performance when power battery pack is used for energy-storage system,
The application of battery pack is had a strong impact on.
Ac impedance technology be reflect battery internal characteristic a kind of electrochemical measurement analytical technology, the performance difference of battery and
Ageing state can be distinguished substantially in the ac impedance spectroscopy in different frequency domain, and this technology is for battery material
Analysis on Mechanism, battery electrode process kineticses are calculated etc. in terms of basic research, can be used for analyzing battery status, characteristic with
And the equivalent-circuit model of battery impedance is established, therefore, the accurate impedance spectrum for obtaining lithium battery has great importance.
Electrochemical alternate impedance spectrum test not only test condition is simple, the time is short, and can obtain test object resistance,
A variety of data such as impedance, induction reactance.Conventional electrochemical alternate impedance spectrum measurement is usually using some constant potential as bias potential, is applied
Add sinusoidal AC voltage signal by a small margin, measure the ac current signal of battery feedback, parse phase angle, the width of different frequency
Value etc., evaluation battery is characterized by these measurement results.The method of this constant potential, it is similar to the research of " static state ", it is most
Analysis, study mechanism for battery material etc..In resistance technique in addition to the method for this constant potential, also have a kind of permanent
The testing impedance mode of electric current, that is, the signal applied are that constant current adds small size alternating current, and this mode is inherently closer
In the application mode of battery, but due to measuring obtained impedance spectra be not as smoothly complete as the spectrogram of constant voltage mode, therefore grind
The scope for studying carefully application is seldom with respect to constant voltage mode.
It is desirable to have a kind of battery functi on method for diagnosing status based on constant current mode impedance spectrum to solve in the prior art
The problem of existing.
The content of the invention
It is an object of the invention to provide a kind of battery functi on method for diagnosing status use based on constant current mode impedance spectrum
Constant current impedance method, by lower adjustment ac current signal amplitude, bias current value, obtain the alternating current suitable for energy-storage battery
Signal amplitude, bias current value, and then constant current impedance exploration is carried out to battery, by equivalent circuit parameter, to battery functi on shape
State is diagnosed.
The present invention provides a kind of battery functi on method for diagnosing status based on constant current mode impedance spectrum, comprises the following steps：
Step 1：Energy-storage battery is overcharged or crossed and is put, constant current mode impedance spectrum is gathered, obtains ac current signal width
Value and bias current value；
Step 2：Pass through the battery equivalent circuit model under constant current mode, parser circuitry parametric device value；
Step 3：Analytic statistics equivalent circuit parameter, battery functi on state is diagnosed.
Preferably, energy-storage battery is overcharged in the step 1 or crossed and put, make the energy-storage battery state-of-charge SOC
Reach -5%-105% state, and keep standing, electrochemical workstation enters under 0-55 DEG C wide temperature range to the energy-storage battery
Row constant current mode testing impedance, gather the constant current mode impedance spectrum.
Preferably, the constant current mode impedance spectrum includes high frequency circular arc, intermediate frequency circular arc and low frequency oblique line.
Preferably, energy-storage battery state-of-charge SOC described in the step 1 reach -5%-105% state keep it is quiet
12h-24h is put, and the frequency of the constant current mode is 100kHz-10mHz.
Preferably, the step 2 obtains battery parameter match value, the battery parameter fitting by Equivalent Circuit Fitting
Value includes：The Ohmic resistance of high frequency region, the SEI resistance of intermediate frequency zone and the ion of charge transfer resistance and low frequency range diffusion electricity
Resistance.
Preferably, the Ohmic resistance of the high frequency region represents that bath resistance, electrode resistance, afflux bulk resistor and battery connect
Fitting resistance.
Preferably, the SEI resistance of the intermediate frequency zone is according to the battery interfacial reaction of electrode material and electrolyte in the circulating cycle
It is determined that.
Preferably, the charge transfer resistance is charge transfer impedance, and the electric capacity of the charge transfer resistance is CPE.
Preferably, the CPE is normal phase angle element, and the impedance of the often phase angle element is：
Wherein, Y0 is admittance；N is zero dimension index；During n=0, the normal phase angle element equivalents of CPE are resistance R；N=0.5
When the normal phase angle element equivalent warburg diffusion impedances of CPE；During n=1, the normal phase angle element equivalents of CPE are electric capacity C.
Preferably, average value and the side of the equivalent circuit parameter of the energy-storage battery monomer are calculated in the step 3
Difference, the battery cell functional status coefficient is calculated, according to homogenization principle, select the big battery of difference.
Battery functi on state is carried out based on the Battery Diagnostic method of constant current mode Measured By Impedance Spectroscopy the invention discloses a kind of
Detection, this method adjust ac current signal width under constant current mode by changing the parameter request of constant current mode impedance spectrometry
Value and bias current value, the real conditions with nearly dynamical fashion closer to battery, and can in the case where not damaging battery
Battery system internal electrode structure is detected, accurately reflects battery health degree and solid electrolyte interface film SEI inside letter
Breath.According to these information, battery functi on state is diagnosed, so as to sub-elect the big battery of performance difference.
Brief description of the drawings
Fig. 1 is the flow chart of the Battery Diagnostic method based on constant current mode Measured By Impedance Spectroscopy.
Embodiment
To make the purpose, technical scheme and advantage that the present invention is implemented clearer, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or class
As label represent same or similar element or the element with same or like function.Described embodiment is the present invention
Part of the embodiment, rather than whole embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to uses
It is of the invention in explaining, and be not considered as limiting the invention.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Embodiments of the invention are described in detail below in conjunction with the accompanying drawings.
Comprise the following steps as Fig. 1 present invention puts forward a kind of Battery Diagnostic method based on constant current mode Measured By Impedance Spectroscopy：
1st, constant current impedance spectrum is gathered, ac current signal amplitude, bias current value under constant current mode is obtained, preferably goes out energy storage
The parameter area and setting requirements of the applicable constant current mode impedance measurement of battery.
2nd, constant current mode impedance spectrum is parsed, passes through the battery equivalent circuit model under constant current mode, parser circuitry
Parametric device value, and compareed with constant voltage mode impedance spectrum equivalent circuit and equivalent current component value, by difference to constant current
Impedance carries out theory study.
3rd, equivalent circuit parameter described in analytic statistics, battery functi on state is diagnosed.
The step 1 is somewhat overcharged or crossed to energy-storage battery and put, and makes battery charge state SOC in -5%-105%,
12h~24h is stood, with the p- 5%-105% state-of-charges of electrochemical workstation, battery carries out constant current under 0-55 DEG C wide temperature range
Mode impedance is tested, and constant current mode frequency is 100kHz-10mHz, gathers constant current mode impedance spectrum, constant current mode impedance spectrum bag
Include：High frequency circular arc, intermediate frequency circular arc and low frequency oblique line.
The impedance curve of step 2 battery：The Ohmic resistance (intersection point with transverse axis) of high frequency region, the SEI electricity of intermediate frequency zone
Resistance and the ion diffusion resistance (oblique line) of charge transfer resistance (two semicircles) and low frequency range；Use Rb respectively, Rsei, Rct with
Zw is represented.By Equivalent Circuit Fitting, the match value of battery parameters has been obtained.Rb represents Ohmic resistance, has reacted electrolysis
Liquid resistance, electrode resistance, afflux bulk resistor and battery connecting piece resistance etc..Rsei is mainly due to battery electrode in the circulating cycle
The interfacial reaction of material/electrolyte, Rct reactions are charge transfer impedances, and the size of interface impedance determines Rct size, electricity
Hold for CPE.
The CPE is normal phase angle element, and the impedance of the often phase angle element is：
Wherein, Y0 is admittance；N is zero dimension index；During n=0, the normal phase angle element equivalents of CPE are resistance R；N=0.5
When the normal phase angle element equivalent warburg diffusion impedances of CPE；During n=1, the normal phase angle element equivalents of CPE are electric capacity C.
The equivalent circuit parameter includes Rb, Rsei, Rct, n-CPEsei, n-CPEct, n-CPEw, Y0-CPEsei、Y0-
CPEct、Y0-CPEw。
The average value and variance of the equivalent circuit parameter of battery cell are calculated in the step 3, calculates the battery cell
Functional status coefficient, according to homogenization principle, the big battery of difference is selected, is left with regard to the normal battery of functional status.
It is last it is to be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.To the greatest extent
The present invention is described in detail with reference to the foregoing embodiments for pipe, it will be understood by those within the art that：It is still
Technical scheme described in foregoing embodiments can be modified, or which part technical characteristic is equally replaced
Change；And these modifications or replacement, the essence of appropriate technical solution is departed from the essence of various embodiments of the present invention technical scheme
God and scope.
Claims (10)
1. a kind of battery functi on method for diagnosing status based on constant current mode impedance spectrum, it is characterised in that comprise the following steps：
Step 1：Energy-storage battery is overcharged or cross put, gather constant current mode impedance spectrum, obtain ac current signal amplitude and
Bias current value；
Step 2：Pass through the battery equivalent circuit model under constant current mode, parser circuitry parametric device value；
Step 3：Analytic statistics equivalent circuit parameter, battery functi on state is diagnosed.
2. the battery functi on method for diagnosing status according to claim 1 based on constant current mode impedance spectrum, it is characterised in that：
Energy-storage battery is overcharged in the step 1 or crossed and is put, the energy-storage battery state-of-charge SOC is reached -5%-105%
State, and keep standing, electrochemical workstation carries out constant current mode impedance under 0-55 DEG C wide temperature range to the energy-storage battery
Test, gathers the constant current mode impedance spectrum.
3. the battery functi on method for diagnosing status according to claim 2 based on constant current mode impedance spectrum, it is characterised in that：
The constant current mode impedance spectrum includes：High frequency circular arc, intermediate frequency circular arc and low frequency oblique line.
4. the battery functi on method for diagnosing status according to claim 2 based on constant current mode impedance spectrum, it is characterised in that：
The state that energy-storage battery state-of-charge SOC described in the step 1 reaches -5%-105% keeps standing 12h-24h, and described
The frequency of constant current mode is 100kHz-10mHz.
5. the battery functi on method for diagnosing status according to claim 1 based on constant current mode impedance spectrum, it is characterised in that：
The step 2 obtains battery parameter match value by Equivalent Circuit Fitting, and the battery parameter match value includes：High frequency region
Ohmic resistance, the SEI resistance of intermediate frequency zone and the ion diffusion resistance of charge transfer resistance and low frequency range.
6. the battery functi on method for diagnosing status according to claim 5 based on constant current mode impedance spectrum, it is characterised in that：
The Ohmic resistance of the high frequency region represents bath resistance, electrode resistance, afflux bulk resistor and battery connecting piece resistance.
7. the battery functi on method for diagnosing status according to claim 5 based on constant current mode impedance spectrum, it is characterised in that：
According to battery, the interfacial reaction of electrode material and electrolyte determines the SEI resistance of the intermediate frequency zone in the circulating cycle.
8. the battery functi on method for diagnosing status according to claim 5 based on constant current mode impedance spectrum, it is characterised in that：
The charge transfer resistance is charge transfer impedance, and the electric capacity of the charge transfer resistance is CPE.
9. the battery functi on method for diagnosing status according to claim 8 based on constant current mode impedance spectrum, it is characterised in that：
The CPE is normal phase angle element, and the impedance of the often phase angle element is：
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Wherein, Y0 is admittance；N is zero dimension index；During n=0, the normal phase angle element equivalents of CPE are resistance R；CPE during n=0.5
Normal phase angle element equivalent warburg diffusion impedances；During n=1, the normal phase angle element equivalents of CPE are electric capacity C.
10. the battery functi on method for diagnosing status according to claim 1 based on constant current mode impedance spectrum, its feature exist
In：The average value and variance of the equivalent circuit parameter of the energy-storage battery monomer are calculated in the step 3, described in calculating
Battery cell functional status coefficient, according to homogenization principle, select the big battery of difference.
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Cited By (11)
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| CN109799465A (en) * | 2018-12-29 | 2019-05-24 | 清华大学 | Fuel cell pack decline diagnostic method |
| CN109814042A (en) * | 2019-01-18 | 2019-05-28 | 合肥国轩高科动力能源有限公司 | A kind of analysis method of lithium ion battery in charge and discharge process middle impedance variation tendency |
| CN110118942A (en) * | 2019-05-22 | 2019-08-13 | 北京科技大学 | A kind of detection method of lithium battery chemical polarization impedance |
| WO2020135693A1 (en) * | 2018-12-29 | 2020-07-02 | 清华大学 | Method for diagnosing decline of fuel cell stack, method for multi-point analysis of fuel cell, and method for estimating performance of membrane electrode of fuel cell |
| CN112114260A (en) * | 2020-08-04 | 2020-12-22 | 中汽研汽车检验中心（天津）有限公司 | Method for testing and evaluating overcharge stability of lithium ion battery monomer |
| CN112147512A (en) * | 2020-09-17 | 2020-12-29 | 北京理工大学 | Diagnosis and separation method for short-circuit and abuse faults of lithium ion battery |
| CN112230153A (en) * | 2020-10-13 | 2021-01-15 | 东华大学 | Method and device for measuring battery impedance value |
| CN112394289A (en) * | 2020-10-27 | 2021-02-23 | 同济大学 | Lithium analysis detection method during charging of lithium ion battery |
| CN112731179A (en) * | 2020-12-21 | 2021-04-30 | 华南理工大学 | Method and device for rapidly detecting health state of battery, detector and storage medium |
| WO2022171993A1 (en) * | 2021-02-09 | 2022-08-18 | Horiba Mira Limited | Power unit analysis |
| CN116008835A (en) * | 2022-06-30 | 2023-04-25 | 上海交通大学 | Single-pulse-response-based battery impedance spectrum testing method and medium |
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| WO2020135693A1 (en) * | 2018-12-29 | 2020-07-02 | 清华大学 | Method for diagnosing decline of fuel cell stack, method for multi-point analysis of fuel cell, and method for estimating performance of membrane electrode of fuel cell |
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| CN109814042A (en) * | 2019-01-18 | 2019-05-28 | 合肥国轩高科动力能源有限公司 | A kind of analysis method of lithium ion battery in charge and discharge process middle impedance variation tendency |
| CN110118942A (en) * | 2019-05-22 | 2019-08-13 | 北京科技大学 | A kind of detection method of lithium battery chemical polarization impedance |
| CN112114260A (en) * | 2020-08-04 | 2020-12-22 | 中汽研汽车检验中心（天津）有限公司 | Method for testing and evaluating overcharge stability of lithium ion battery monomer |
| CN112147512A (en) * | 2020-09-17 | 2020-12-29 | 北京理工大学 | Diagnosis and separation method for short-circuit and abuse faults of lithium ion battery |
| CN112230153A (en) * | 2020-10-13 | 2021-01-15 | 东华大学 | Method and device for measuring battery impedance value |
| CN112230153B (en) * | 2020-10-13 | 2021-07-20 | 东华大学 | Method and device for measuring battery impedance value |
| WO2022078379A1 (en) * | 2020-10-13 | 2022-04-21 | 东华大学 | Method and apparatus for measuring battery impedance value |
| CN112394289A (en) * | 2020-10-27 | 2021-02-23 | 同济大学 | Lithium analysis detection method during charging of lithium ion battery |
| CN112394289B (en) * | 2020-10-27 | 2021-10-08 | 同济大学 | Lithium analysis detection method during charging of lithium ion battery |
| CN112731179A (en) * | 2020-12-21 | 2021-04-30 | 华南理工大学 | Method and device for rapidly detecting health state of battery, detector and storage medium |
| GB2603894A (en) * | 2021-02-09 | 2022-08-24 | Horiba Mira Ltd | Power unit analysis |
| WO2022171993A1 (en) * | 2021-02-09 | 2022-08-18 | Horiba Mira Limited | Power unit analysis |
| CN116008835A (en) * | 2022-06-30 | 2023-04-25 | 上海交通大学 | Single-pulse-response-based battery impedance spectrum testing method and medium |
| CN116008835B (en) * | 2022-06-30 | 2023-10-27 | 上海交通大学 | Single-pulse-response-based battery impedance spectrum testing method and medium |
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Application publication date: 20180202 |