CN105866695B - Method for detecting lithium deposition of rechargeable battery, battery management system and battery system - Google Patents
Method for detecting lithium deposition of rechargeable battery, battery management system and battery system Download PDFInfo
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- CN105866695B CN105866695B CN201610255360.5A CN201610255360A CN105866695B CN 105866695 B CN105866695 B CN 105866695B CN 201610255360 A CN201610255360 A CN 201610255360A CN 105866695 B CN105866695 B CN 105866695B
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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]
- G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The embodiment of the invention provides a detection method for lithium separation of a rechargeable battery, a battery management system and a battery system. On one hand, in the embodiment of the invention, the charging voltage and the state of charge of the rechargeable battery are detected in the process of pulse charging of the rechargeable battery, and the charging voltage of the rechargeable battery is used as the first voltage, so that the voltage value corresponding to the state of charge is obtained from the preset corresponding relation between the open-circuit voltage and the state of charge and is used as the second voltage, and further, whether lithium precipitation occurs in the rechargeable battery in the process of pulse charging is judged according to the first voltage and the second voltage. Therefore, the technical scheme provided by the embodiment of the invention is used for solving the problems of complex operation and low efficiency of detecting the lithium separation condition of the rechargeable battery in the prior art.
Description
[technical field]
The present invention relates to battery technology field more particularly to the rechargeable battery analysis detection method of lithium, battery management system and
Battery system.
[background technique]
Lithium ion battery is latest generation green high-capacity rechargeable battery, has that voltage is high, energy density is big, cycle performance
It good, outstanding advantages of self discharge is small, memory-less effect, is developed rapidly in recent years.Various handheld devices and notebook electricity
The electronic products such as brain largely use lithium ion battery, and hybrid electric vehicle, pure electric automobile largely use lithium-ion-power cell, fly
The fields such as machine, satellite, space probe also start using lithium ion battery as energy storing devices.In power battery application field,
Brake energy recovery is one of modern electric car important technology and their considerable advantage.
The process of Brake energy recovery is the charging process to rechargeable battery, and braking process is often relatively more rapid, thus right
Battery forms of short duration large current pulse charging.Lithium ion battery is during pulse charge, along with polarization phenomena, anode electricity
Position increases, cathode potential decline.Although the pulse charge duration is short, electric current is very big, and the polarizing voltage of formation is also very big.When
When the electrode potential of graphite is lower than the electrode potential of lithium, lithium ion is gathered in graphite cathode surface and has little time to be embedded in pole piece
Portion occurs cathode and analyses lithium phenomenon.Rechargeable battery occurs analysis lithium and not only capacity is caused to decline, power decline, service life decline；And
And it may cause rechargeable battery short circuit and serious accident occur.
In realizing process of the present invention, at least there are the following problems in the prior art for inventor's discovery:
In the prior art can only be by dismantling rechargeable battery observation after rechargeable battery use, and then judge charging electricity
The analysis lithium situation in pond can not monitor the analysis lithium situation of rechargeable battery in real time, and judging result lag is complicated for operation, reduces charging
The detection efficiency of battery analysis lithium.
[summary of the invention]
In view of this, the embodiment of the invention provides a kind of rechargeable battery analysis detection method of lithium, battery management system and
Battery system, complicated for operation when solving to detect rechargeable battery analysis lithium situation in the prior art and detection analysis lithium situation effect
The lower problem of rate.
On the one hand, the embodiment of the invention provides a kind of detection methods of rechargeable battery analysis lithium, comprising:
During rechargeable battery carries out pulse charge, the charging voltage and state-of-charge of the rechargeable battery are detected,
The charging voltage of the rechargeable battery is as first voltage；
Corresponding relationship between preset open-circuit voltage and state-of-charge obtains voltage corresponding to the state-of-charge
Value, using as second voltage；
According to the first voltage and the second voltage, judge whether the rechargeable battery is sent out during pulse charge
Raw analysis lithium.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the method is also
It include: the corresponding relationship generated between open-circuit voltage and state-of-charge.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, according to described
One voltage and the second voltage, judge whether the rechargeable battery occurs to analyse lithium during pulse charge, comprising:
Calculate the difference between the first voltage and the second voltage, using as the rechargeable battery described charged
Polarization potential under state；
Polarization potential of the rechargeable battery under the state-of-charge is compared with preset polarization potential threshold value；
If polarization potential of the rechargeable battery under the state-of-charge is more than or equal to the polarization potential threshold value,
Judge that the rechargeable battery occurs to analyse lithium during pulse charge.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the polarization electricity
The number of position is at least one；The method also includes: if respectively polarization is electric during the pulse charge for the rechargeable battery
Position is both less than the polarization potential threshold value, and judging the rechargeable battery, there is no analysing lithium during pulse charge.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, by the charging
Battery before the polarization potential under the state-of-charge is compared with preset polarization potential threshold value, also wrap by the method
It includes:
According to Current Temperatures, the corresponding relationship under the Current Temperatures between state-of-charge and polarization potential threshold value is determined；
According to the corresponding relationship under the Current Temperatures between state-of-charge and polarization potential threshold value, the charging electricity is determined
Pond corresponding polarization potential threshold value under the state-of-charge.
A technical solution in above-mentioned technical proposal has the following beneficial effects:
The embodiment of the present invention is by detecting the charging of the rechargeable battery during rechargeable battery carries out pulse charge
Voltage and state-of-charge, the charging voltage of the rechargeable battery as first voltage, thus, from preset open-circuit voltage with it is charged
Corresponding relationship between state obtains voltage value corresponding to the state-of-charge, using as second voltage, in turn, according to institute
First voltage and the second voltage are stated, judges whether the rechargeable battery occurs to analyse lithium during pulse charge.The present invention
Charging voltage and state-of-charge of the embodiment by detection rechargeable battery during pulse charge, can determine charging electricity in real time
Whether pond occurs to analyse lithium, which does not need to destroy rechargeable battery, so as to avoid by dismantling battery observation judgement analysis lithium feelings
The lag of judging result caused by condition and situation complicated for operation, since the embodiment of the present invention is capable of real-time detection rechargeable battery
Lithium situation is analysed, it is easy to operate, the detection efficiency of rechargeable battery analysis lithium is improved, solves detection rechargeable battery analysis in the prior art
Complicated for operation and detection analysis lithium situation efficiency lower problem when lithium situation.
On the other hand, the embodiment of the invention provides a kind of battery management systems, comprising:
Detection module, for during rechargeable battery carries out pulse charge, detecting the charging electricity of the rechargeable battery
Pressure and state-of-charge, the charging voltage of the rechargeable battery is as first voltage；
Module is obtained, for obtaining current charged shape from the corresponding relationship between preset open-circuit voltage and state-of-charge
Voltage value corresponding to state, using as second voltage；
Judgment module, for judging that the rechargeable battery is filled in pulse according to the first voltage and the second voltage
Whether occur to analyse lithium in electric process.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the cell tube
Reason system further includes generation module:
The generation module, for generating the corresponding relationship between open-circuit voltage and state-of-charge.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the judgement mould
Block is specifically used for:
Calculate the difference between the first voltage and the second voltage, using as the rechargeable battery described charged
Polarization potential under state；
Polarization potential of the rechargeable battery under the state-of-charge is compared with preset polarization potential threshold value；
If polarization potential of the rechargeable battery under the state-of-charge is more than or equal to the polarization potential threshold value,
Judge that the rechargeable battery occurs to analyse lithium during pulse charge.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the polarization electricity
The number of position is at least one；The judgment module, if being also used to the rechargeable battery each pole during the pulse charge
Change current potential and be both less than the polarization potential threshold value, judging the rechargeable battery, there is no analysing lithium during pulse charge.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the cell tube
Reason system further includes determining module:
The determining module, for according to Current Temperatures, determining state-of-charge and polarization potential threshold under the Current Temperatures
Corresponding relationship between value；And it is also used to according to pair under the Current Temperatures between state-of-charge and polarization potential threshold value
It should be related to, determine the rechargeable battery corresponding polarization potential threshold value under the state-of-charge.
A technical solution in above-mentioned technical proposal has the following beneficial effects:
Detection module in battery management system of the embodiment of the present invention passes through the process in rechargeable battery progress pulse charge
In, detect the charging voltage and state-of-charge of the rechargeable battery, the charging voltage of the rechargeable battery as first voltage, from
And the acquisition module in battery management system obtains current from the corresponding relationship between preset open-circuit voltage and state-of-charge
Voltage value corresponding to state-of-charge is using as second voltage, in turn, the judgment module in battery management system is according to described
One voltage and the second voltage, judge whether the rechargeable battery occurs to analyse lithium during pulse charge.The present invention is implemented
Charging voltage and state-of-charge of the example by detection rechargeable battery during pulse charge, can determine that rechargeable battery is in real time
Lithium is analysed in no generation, which does not need to destroy rechargeable battery, is led so as to avoid by dismantling battery observation judgement analysis lithium situation
The judging result of cause lags and situation complicated for operation, since the embodiment of the present invention is capable of the analysis lithium of real-time detection rechargeable battery
Situation, it is easy to operate, the detection efficiency of rechargeable battery analysis lithium is improved, solves detection rechargeable battery analysis lithium feelings in the prior art
Complicated for operation and detection analysis lithium situation efficiency lower problem when condition.
In another aspect, the embodiment of the invention provides a kind of battery systems, comprising: rechargeable battery and above-mentioned battery management
System.
A technical solution in above-mentioned technical proposal has the following beneficial effects:
The embodiment of the present invention is by detecting the charging of the rechargeable battery during rechargeable battery carries out pulse charge
Voltage and state-of-charge, the charging voltage of the rechargeable battery as first voltage, thus, from preset open-circuit voltage with it is charged
Corresponding relationship between state obtains voltage value corresponding to the state-of-charge, using as second voltage, in turn, according to institute
First voltage and the second voltage are stated, judges whether the rechargeable battery occurs to analyse lithium during pulse charge.The present invention
Charging voltage and state-of-charge of the embodiment by detection rechargeable battery during pulse charge, can determine charging electricity in real time
Whether pond occurs to analyse lithium, which does not need to destroy rechargeable battery, so as to avoid by dismantling battery observation judgement analysis lithium feelings
The lag of judging result caused by condition and situation complicated for operation, since the embodiment of the present invention is capable of real-time detection rechargeable battery
Lithium situation is analysed, it is easy to operate, the detection efficiency of rechargeable battery analysis lithium is improved, solves detection rechargeable battery analysis in the prior art
Complicated for operation and detection analysis lithium situation efficiency lower problem when lithium situation.
[Detailed description of the invention]
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without any creative labor, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the flow diagram of the detection method of the analysis lithium of rechargeable battery provided by the embodiment of the present invention；
Fig. 2 is that the voltage of rechargeable battery and state-of-charge close during a kind of pulse charge provided by the embodiment of the present invention
It is schematic diagram；
Fig. 3 is that the voltage of rechargeable battery and state-of-charge close during another pulse charge provided by the embodiment of the present invention
It is schematic diagram；
Fig. 4 is that the voltage of rechargeable battery and state-of-charge close during another pulse charge provided by the embodiment of the present invention
It is schematic diagram；
Fig. 5 is the functional block diagram of battery management system provided by the embodiment of the present invention；
Fig. 6 is the functional block diagram of battery system provided by the embodiment of the present invention.
[specific embodiment]
For a better understanding of the technical solution of the present invention, being retouched in detail to the embodiment of the present invention with reference to the accompanying drawing
It states.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
It will be appreciated that though voltage may be described in embodiments of the present invention using term first, second etc., but these
Voltage should not necessarily be limited by these terms.These terms are only used to for voltage being distinguished from each other out.For example, not departing from the embodiment of the present invention
In the case where range, first voltage can also be referred to as second voltage, and similarly, second voltage can also be referred to as the first electricity
Pressure.
Depending on context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determination " or " in response to detection ".Similarly, depend on context, phrase " if it is determined that " or " if detection
(condition or event of statement) " can be construed to " when determining " or " in response to determination " or " when the detection (condition of statement
Or event) when " or " in response to detection (condition or event of statement) ".
Embodiment one
The embodiment of the present invention provides a kind of detection method of rechargeable battery analysis lithium, referring to FIG. 1, it is the embodiment of the present invention
The flow diagram of the detection method of provided rechargeable battery analysis lithium, as shown in Figure 1, method includes the following steps:
S101 detects the charging voltage and state-of-charge of rechargeable battery during rechargeable battery carries out pulse charge,
The charging voltage of rechargeable battery is as first voltage.
In the embodiment of the present invention, when rechargeable battery pulsing charges, that is, the charging for starting real-time detection rechargeable battery is electric
Pressure and state-of-charge, are in order to which whether real-time judge rechargeable battery has occurred analysis lithium during pulse charge.Specifically, will inspection
The charging voltage of the rechargeable battery measured is as first voltage.
Specifically, in the embodiment of the present invention, during rechargeable battery carries out pulse charge, the current state of rechargeable battery
It may include: charged state, electric discharge output energy state or no current state.That is, pulse charge process can be in charging electricity
Generation when pond is in charged state can also occur when rechargeable battery is in electric discharge output energy state, can also fill
Battery occurs when being in no current state, and the embodiment of the present invention is to this without limiting.
Specifically, the adaptable object of rechargeable battery in the embodiment of the present invention can include but is not limited to: mixing is dynamic
Power automobile, pure power vehicle, rail traffic, ship, aircraft or data center's backup power source etc..
It should be noted that state-of-charge (State of Charge, SOC) refers to that rechargeable battery uses a period of time
Or after laying up for a long time, remaining capacity and it is fully charged after electricity ratio, can use percentage expression.For example, certain
The SOC state of one rechargeable battery is 50%, that is, indicates that the remaining capacity of the rechargeable battery accounts for the rechargeable battery full of rear electricity
50%.
During a concrete implementation, the process of rechargeable battery pulsing charging is very short, detects rechargeable battery
Charging voltage and state-of-charge, can periodically carry out at a certain time interval, or can also at the time of specified into
Row.In the embodiment of the present invention, the concrete mode of charging voltage and state-of-charge for detection rechargeable battery is not defined.
It is understood that in the embodiment of the present invention, detect and the charging voltage of rechargeable battery got and charged shape
State number is equal, and is all at least one.
For example, if the pulse charge of 2s has occurred in rechargeable battery, it can be after pulse charge starts between the time of 0.01s
Every detected and obtain rechargeable battery charging voltage and current state-of-charge.Alternatively, in another example, if rechargeable battery has occurred
The pulse charge of 2s, can 0.1s during pulse charge, 0.5s, 1s, 1.5s, 2s given time inspection
Survey and obtain rechargeable battery charging voltage and current state-of-charge.
It is understood that being to close correspondingly between the charging voltage and state-of-charge of the rechargeable battery that detection obtains
System.After rechargeable battery completes pulse charge process, charging is can be obtained in the charging voltage and state-of-charge obtained according to detection
Battery is in the complete procedure for carrying out pulse charge, complete corresponding relationship between the charging voltage and state-of-charge of rechargeable battery
Curve.
S102, the corresponding relationship between preset open-circuit voltage and state-of-charge obtain electricity corresponding to state-of-charge
Pressure value, using as second voltage.
In the embodiment of the present invention, the corresponding relationship between open-circuit voltage and state-of-charge can be pre-generated.In turn, according to
Corresponding relationship between preset open-circuit voltage and state-of-charge, can be with quick obtaining to open circuit corresponding with current state-of-charge
The voltage value of voltage, is denoted as second voltage.
During a concrete implementation, opening for rechargeable battery can be measured in the embodiment of the present invention with lesser electric current
Road voltage (Open Circuit Voltage, OCV) curve, to establish the corresponding pass between open-circuit voltage and state-of-charge
System.For example, with 0.03 coulomb of electric current by rechargeable battery, the OCV for measuring the rechargeable battery is bent for a certain rechargeable battery
Line, to obtain the open-circuit voltage of the rechargeable battery and the corresponding relationship of state-of-charge.
Specifically, the corresponding relationship between the open-circuit voltage and state-of-charge of generation can be remembered in the embodiment of the present invention
Record allows to the state-of-charge that is arbitrarily designated quickly according to the rechargeable battery, determining and specified lotus in battery management system
The voltage value of the corresponding open-circuit voltage of electricity condition.For example, for the above-mentioned rechargeable battery for measuring OCV curve, can will measure
The OCV curve of rechargeable battery is stored in battery management system, it is assumed that, can when the SOC state of the rechargeable battery being specified to be 20%
To determine that the battery corresponds to the voltage value that SOC state is 20% according to the OCV curve stored.
S103 judges whether rechargeable battery occurs to analyse lithium during pulse charge according to first voltage and second voltage.
In the embodiment of the present invention, by the first voltage and second voltage got, that is, it can determine whether rechargeable battery in pulse
Whether occur to analyse lithium in charging process.
It is understood that first voltage and the second electricity during a concrete implementation, in the embodiment of the present invention
Pressure, the same state-of-charge corresponding to rechargeable battery.That is, in the embodiment of the present invention, the first voltage that detects and get,
Two voltages are equal with the number of state-of-charge, and are all at least one.
In the embodiment of the present invention, the difference between first voltage and second voltage can be calculated, using as rechargeable battery
Then the polarization potential of rechargeable battery is compared by polarization potential with preset polarization potential threshold value, can be by comparing knot
Fruit determines whether rechargeable battery occurs analysis lithium during pulse charge.
It is for specified specifically, the polarization potential of rechargeable battery is compared with preset polarization potential threshold value
Current state-of-charge, i.e., above-mentioned comparison result can only determine rechargeable battery whether some point during pulse charge
Whether lithium is analysed in generation.The polarization potential and preset polarization potential threshold value got when for example, comparing pulse charge 1s, only
Analysis lithium whether has occurred in the 1s of pulsing charging process with determination.Therefore, judge that rechargeable battery is by comparing result
It is no that analysis lithium has been carried out during entire pulse charge, need to detect and obtain rechargeable battery the entire pulse charge during
Charging voltage and state-of-charge, and then the means for passing through real-time detection and comparing in real time, determine whether rechargeable battery fills in pulse
Analysis lithium occurs in electric process.
Specifically, if polarization potential of the rechargeable battery under current state-of-charge is more than or equal to polarization potential threshold value,
Judge that rechargeable battery occurs to analyse lithium during pulse charge.As long as that is, detecting rechargeable battery in some charged shape
Polarization potential under state is more than or equal to polarization potential threshold value, that is, can determine that rechargeable battery has occurred during pulse charge
Analyse lithium.
Specifically, judging to charge if polarization potential of rechargeable battery during pulse charge is less than polarization potential threshold value
There is no analysing lithium during pulse charge for battery.That is, when rechargeable battery is during complete pulse charge, Suo Youhe
Polarization potential under electricity condition is both less than polarization potential threshold value, can just determine that rechargeable battery is not sent out during pulse charge
Raw analysis lithium.
For example, Fig. 2 is referred to, for rechargeable battery during a kind of pulse charge provided by the embodiment of the present invention
Voltage and state-of-charge relation schematic diagram.Wherein, curve 1 is the OCV curve of the rechargeable battery, and curve 2 is respectively with curve 3
Graph of relation when rechargeable battery pulsing charges between charging voltage and state-of-charge, pulse curve 2 and pulse curve 3
Correspond respectively to independent pulse charge process.
As illustrated in fig. 2, it is assumed that using the point of 2 upward arrow of pulse curve instruction as separation, before pulse charge process is divided into
Section pulse charge process and back segment pulse charge process.Under the corresponding current state-of-charge of the separation, calculate first voltage with
The difference of second voltage obtains polarization potential, and polarization potential is just equal to polarization potential threshold value, indicates that rechargeable battery starts in the point
Analysis lithium occurs；During back segment pulse charge on pulse curve 2, under any state-of-charge, first voltage and the second electricity are calculated
The polarization potential that the difference of pressure obtains is both greater than polarization potential threshold value, indicates that rechargeable battery is analysed during back segment pulse charge
Lithium；Leading portion pulse charge process on pulse curve 2 under all state-of-charges, calculates the difference of first voltage and second voltage
Obtained polarization potential is both less than polarization potential threshold value, and indicating rechargeable battery, there is no analysis during leading portion pulse charge
Lithium.Hence, it can be determined that analysis lithium has occurred during rechargeable battery pulse charge corresponding to pulse curve 2, and be
Analysis lithium takes place on the separation that arrow indicates in figure.
As shown in Fig. 2, the polarization potential on pulse curve 3 under all state-of-charges is both less than polarization potential threshold value, indicate
All there is no analysing lithium during complete pulse charge for rechargeable battery.Hence, it can be determined that the rechargeable battery is in pulse song
There is no analysing lithium during pulse charge corresponding to line 3.
In the embodiment of the present invention, the polarization potential threshold value of rechargeable battery can be given when rechargeable battery dispatches from the factory is demarcated.
In the embodiment of the present invention, the polarization potential threshold value of rechargeable battery is influenced by temperature and rechargeable battery state-of-charge.
Specifically, the polarization potential threshold value of rechargeable battery is different under different temperatures, therefore, not equality of temperature can be preset
Corresponding relationship under degree, between the state-of-charge and polarization potential threshold value of rechargeable battery.It then, can be true according to Current Temperatures
Corresponding relationship at settled preceding temperature between state-of-charge and polarization potential threshold value, in turn, according to state-of-charge under Current Temperatures
With the corresponding relationship between polarization potential threshold value, the corresponding polarization potential threshold value of current state-of-charge is determined.
For example, working as temperature≤0 DEG C, polarization potential threshold value is 1V, i.e., when the polarization potential of rechargeable battery is more than or equal to
When 1V, determine that analysis lithium occurs for rechargeable battery.Alternatively, in another example, when temperature≤- 20 DEG C, polarization potential threshold value is 0.8V, i.e., ought fill
When polarization potential >=0.8V of battery, determine that analysis lithium occurs for rechargeable battery.
It is understood that the polarization potential threshold value of rechargeable battery refers to the critical polarization of rechargeable battery in the embodiment of the present invention
Current potential can just occur to analyse lithium only when the polarization potential of rechargeable battery reaches the critical polarization potential；If the polarization of rechargeable battery
Current potential is not up to the critical polarization potential, then does not occur to analyse lithium.
In the embodiment of the present invention, then it can also will be calculated by calculating the ratio between first voltage and second voltage
Whether obtained ratio is compared with preset threshold value, and then determine rechargeable battery in pulse charge process by comparing result
Lithium is analysed in middle generation.The ratio that rechargeable battery is calculated is compared with preset threshold value, and for specified current lotus
Electricity condition, i.e. comparison result can only determine rechargeable battery, and whether some point during pulse charge analyses
Lithium.Therefore, it is necessary to detect and obtain charging voltage and state-of-charge of the rechargeable battery during entire pulse charge, Jin Ertong
The means crossing real-time detection and comparing in real time, determine whether rechargeable battery occurs analysis lithium during pulse charge.
Specifically, if the ratio that is calculated of the rechargeable battery under current state-of-charge is more than or equal to preset threshold
Value judges that rechargeable battery occurs to analyse lithium during pulse charge.As long as that is, detecting rechargeable battery in some charged shape
The ratio being calculated under state is more than or equal to preset threshold value, that is, can determine that rechargeable battery during pulse charge
Analysis lithium has occurred.Alternatively, if the ratio that is calculated of rechargeable battery during pulse charge is less than preset threshold value, judgement
There is no analysing lithium during pulse charge for rechargeable battery.That is, when rechargeable battery is during complete pulse charge, institute
There is the ratio being calculated under state-of-charge to be less than preset threshold value, can just determine rechargeable battery during pulse charge
There is no analysing lithium.
It is understood that by calculating whether the difference between second voltage value and the first voltage value judges rechargeable battery
Preset polarization potential threshold value in the method for analysis lithium occurs, and by calculating the ratio between second voltage value and the first voltage value
Judge whether rechargeable battery occurs to analyse preset threshold value in the method for lithium and be different, can be set according to actual needs.
The technical solution of the embodiment of the present invention has the advantages that
The embodiment of the present invention is by detecting the charging voltage of rechargeable battery during rechargeable battery carries out pulse charge
With state-of-charge, the charging voltage of rechargeable battery as first voltage, thus, between preset open-circuit voltage and state-of-charge
Corresponding relationship, voltage value corresponding to state-of-charge is obtained, using as second voltage, in turn, according to first voltage and second
Voltage, judges whether rechargeable battery occurs to analyse lithium during pulse charge.The embodiment of the present invention is existed by detecting rechargeable battery
Charging voltage and state-of-charge during pulse charge, can determine whether rechargeable battery occurs to analyse lithium in real time, and the process is not
Need to destroy rechargeable battery, so as to avoid by dismantle battery observation judgement analysis lithium situation caused by judging result lag and
Situation complicated for operation, it is easy to operate since the embodiment of the present invention is capable of the analysis lithium situation of real-time detection rechargeable battery, it improves
Rechargeable battery analyses the detection efficiency of lithium, complicated for operation and detection when solving detection rechargeable battery analysis lithium situation in the prior art
Analyse the lower problem of the efficiency of lithium situation.
Embodiment two
The detection method of the analysis of rechargeable battery provided by one lithium based on the above embodiment, referring to FIG. 3, it is real for the present invention
Apply the voltage and state-of-charge relation schematic diagram of rechargeable battery during another pulse charge provided by example, the embodiment of the present invention
For a kind of concrete methods of realizing of embodiment one.
When rechargeable battery is being carried out electric discharge output energy, pulse charge process has occurred, as shown in figure 3, curve 1
For the OCV curve of rechargeable battery, rechargeable battery carries out the AB section curve that electric discharge corresponds in Fig. 3, and in B point arteries and veins occurs for rechargeable battery
Punching charging, pulse charge process correspond to the BC section curve in Fig. 3.Assuming that the SOC state of B point is 30%, pulse charge terminates
When C point SOC state be 40%.SOC state and charging voltage value of the real-time detection rechargeable battery on BC sections of curves, will acquire
The first voltage Yu second voltage of (30%-40%) carry out difference calculating under each SOC state arrived, obtain polarization potential, and
Polarization potential is compared with polarizing voltage threshold value.As shown in figure 3, in entire BC sections of curve, the polarization potential of rechargeable battery
Always it is not up to polarization potential threshold value, determines that rechargeable battery does not occur to analyse lithium during BC sections of curves corresponding pulse charge.
Embodiment three
The detection method of the analysis of rechargeable battery provided by one lithium based on the above embodiment, referring to FIG. 4, it is real for the present invention
The voltage of another pulse charge process provided by example and state-of-charge relation schematic diagram are applied, the embodiment of the present invention is embodiment one
A kind of concrete methods of realizing.
When rechargeable battery is slowly charged, pulse charge process has occurred, as shown in figure 4, curve 1 is to fill
The OCV curve of battery, the process that rechargeable battery is slowly charged correspond to the DE section curve in Fig. 4, and rechargeable battery is in E point
Pulsing charging, pulse charge process correspond to the EF section curve in Fig. 4.The SOC state of E point is 78% in Fig. 4, and pulse is filled
The SOC state of F point is 86% at the end of electricity.SOC state and charging voltage value of the real-time detection rechargeable battery on EF sections of curves,
The first voltage Yu second voltage of (78%-86%) carry out difference calculating under each SOC state that will acquire, and obtain polarization electricity
Position, and polarization potential is compared with polarizing voltage threshold value.On entire EF sections of curve, some point before F is schemed
The position that arrow indicates in 4, the polarization potential of the point have reached polarization potential threshold value, determine the point that rechargeable battery is indicated in arrow
Analysis lithium takes place, i.e. analysis lithium has occurred during EF sections of corresponding pulse charges in rechargeable battery.
Example IV
The present embodiment is a kind of concrete methods of realizing of embodiment one.
In hybrid vehicle operation, if rechargeable battery is carrying out electric discharge output energy, in the SOC shape of rechargeable battery
When state is 30%, the pulse charge of 2s is had occurred in rechargeable battery.Thus, it is possible to determine that rechargeable battery is with current SOC state
30% corresponding polarization potential threshold value.
Rechargeable battery during the pulse charge of 2s, detect and obtain the first voltage of rechargeable battery, second voltage with
First voltage and second voltage are carried out difference and polarization potential are calculated by state-of-charge, by the polarization potential being calculated with
Polarization potential threshold value is compared.Rechargeable battery is detected during the pulse charge of 2s, SOC is first corresponding to 30%
The difference of voltage and second voltage is not up to polarization potential threshold value, i.e. polarization potential is not up to polarization potential threshold value, determines charging
There is no analysing lithium during the pulse charge of this 2s for battery.
Embodiment five
The present embodiment is a kind of concrete methods of realizing of embodiment one.
In hybrid vehicle operation, if rechargeable battery is carrying out electric discharge output energy, in the SOC shape of rechargeable battery
When state is 30%, the pulse charge of 10s is had occurred in rechargeable battery.At this point, the polarization potential threshold value of rechargeable battery is 1V.
Rechargeable battery during the pulse charge of 10s, detect and obtain the first voltage of rechargeable battery, second voltage with
First voltage and second voltage are carried out difference and polarization potential are calculated by state-of-charge, by the polarization potential being calculated with
Polarization potential threshold value is compared.Rechargeable battery is detected in 8s, SOC is first voltage corresponding to 30% and the second electricity
The difference of pressure reaches 1V, i.e. the polarization potential of rechargeable battery reaches 1V, determines that analysis lithium takes place in 8s in rechargeable battery, that is, charges
Analysis lithium has occurred during the pulse charge of 10s in battery.
Embodiment six
The present embodiment is a kind of concrete methods of realizing of embodiment one.
In hybrid vehicle operation, if rechargeable battery is carrying out electric discharge output energy, in the SOC shape of rechargeable battery
When state is 30%, the pulse charge of 30s is had occurred in rechargeable battery.At this point, the polarization potential threshold value of rechargeable battery is 1V.
Rechargeable battery during the pulse charge of 30s, detect and obtain the first voltage of rechargeable battery, second voltage with
First voltage and second voltage are carried out difference and polarization potential are calculated by state-of-charge, by the polarization potential being calculated with
Polarization potential threshold value is compared.Rechargeable battery is detected in 20s, SOC is first voltage and second corresponding to 30%
Difference in voltage reaches 1V, i.e. the polarization potential of rechargeable battery reaches 1V, determines that analysis lithium takes place in 20s in rechargeable battery, i.e.,
Analysis lithium has occurred during the pulse charge of 30s in rechargeable battery.
Embodiment seven
The present embodiment is a kind of concrete methods of realizing of embodiment one.
In hybrid vehicle operation, if rechargeable battery is carrying out electric discharge output energy, in the SOC shape of rechargeable battery
When state is 50%, the pulse charge of 30s is had occurred in rechargeable battery.At this point, the polarization potential threshold value of rechargeable battery is 1V.
Rechargeable battery detects and obtains the first voltage and second voltage of rechargeable battery during the pulse charge of 30s,
First voltage and second voltage are subjected to difference, polarization potential is calculated, by the polarization potential being calculated and polarization potential threshold
Value is compared.Rechargeable battery is detected in 15s, SOC is that the difference of first voltage and second voltage corresponding to 50% reaches
To 1V, i.e. the polarization potential of rechargeable battery reaches 1V, determines that analysis lithium takes place in 15s in rechargeable battery, i.e. rechargeable battery exists
Analysis lithium has occurred during the pulse charge of 30s.
Embodiment eight
The present embodiment is a kind of concrete methods of realizing of embodiment one.
In hybrid vehicle operation, if rechargeable battery is carrying out electric discharge output energy, in the SOC shape of rechargeable battery
When state is 70%, the pulse charge of 30s is had occurred in rechargeable battery.At this point, the polarization potential threshold value of rechargeable battery is 1V.
Rechargeable battery during the pulse charge of 30s, detect and obtain the first voltage of rechargeable battery, second voltage with
First voltage and second voltage are carried out difference and polarization potential are calculated by state-of-charge, by the polarization potential being calculated with
Polarization potential threshold value is compared.Rechargeable battery is detected in 5s, SOC is first voltage corresponding to 70% and the second electricity
The difference of pressure reaches 1V, i.e. the polarization potential of rechargeable battery reaches 1V, determines that analysis lithium takes place in 5s in rechargeable battery, that is, charges
Analysis lithium has occurred during the pulse charge of 30s in battery.
Embodiment nine
The present embodiment is a kind of concrete methods of realizing of embodiment one.
In hybrid vehicle operation, if rechargeable battery is in no current state, it is in the SOC state of rechargeable battery
When 30%, the pulse charge of 30s is had occurred in rechargeable battery.At this point, the polarization potential threshold value of rechargeable battery is 1V.
Rechargeable battery during the pulse charge of 30s, detect and obtain the first voltage of rechargeable battery, second voltage with
First voltage and second voltage are carried out difference and polarization potential are calculated by state-of-charge, by the polarization potential being calculated with
Polarization potential threshold value is compared.Rechargeable battery is detected in 25s, SOC is first voltage and second corresponding to 30%
Difference in voltage reaches 1V, i.e. the polarization potential of rechargeable battery reaches 1V, determines that analysis lithium takes place in 25s in rechargeable battery, i.e.,
Analysis lithium has occurred during the pulse charge of 30s in rechargeable battery.
Embodiment ten
The present embodiment is a kind of concrete methods of realizing of embodiment one.
In hybrid vehicle operation, if rechargeable battery is carrying out slow charging process, in the temperature of rechargeable battery
It is 25 degree, when the SOC state of rechargeable battery is 30%, the pulse charge of 30s is had occurred in rechargeable battery.According to Current Temperatures with fill
The current SOC state of battery determines that the polarization potential threshold value of rechargeable battery is 1V.
Rechargeable battery during the pulse charge of 30s, detect and obtain the first voltage of rechargeable battery, second voltage with
First voltage and second voltage are carried out difference and polarization potential are calculated by state-of-charge, by the polarization potential being calculated with
Polarization potential threshold value is compared.Rechargeable battery is detected in 18s, SOC is first voltage and second corresponding to 30%
Difference in voltage reaches 1V, i.e. the polarization potential of rechargeable battery reaches 1V, determines that analysis lithium takes place in 18s in rechargeable battery, i.e.,
Analysis lithium has occurred during the pulse charge of 30s in rechargeable battery.
Embodiment 11
The present embodiment is a kind of concrete methods of realizing of embodiment one.
In hybrid vehicle operation, if rechargeable battery is carrying out electric discharge output energy, when the temperature of rechargeable battery
It is 0 degree, when the SOC state of rechargeable battery is 30%, the pulse charge of 30s is had occurred in rechargeable battery.According to Current Temperatures with fill
The current SOC state of battery determines that the polarization potential threshold value of rechargeable battery is 1.1V.
Rechargeable battery during the pulse charge of 30s, detect and obtain the first voltage of rechargeable battery, second voltage with
First voltage and second voltage are carried out difference and polarization potential are calculated by state-of-charge, by the polarization potential being calculated with
Polarization potential threshold value is compared.Rechargeable battery is detected in 20s, SOC is first voltage and second corresponding to 30%
Difference in voltage reaches 1.1V, i.e. the polarization potential of rechargeable battery reaches 1.1V, determines that analysis takes place in 20s in rechargeable battery
Analysis lithium has occurred during the pulse charge of 30s in lithium, i.e. rechargeable battery.
Embodiment 12
The present embodiment is a kind of concrete methods of realizing of embodiment one.
In hybrid vehicle operation, if rechargeable battery is carrying out electric discharge output energy, when the temperature of rechargeable battery
For -25 degree, when the SOC state of rechargeable battery is 30%, the pulse charge of 30s is had occurred in rechargeable battery.According to Current Temperatures with
The current SOC state of rechargeable battery determines that the polarization potential threshold value of rechargeable battery is 1.2V.
Rechargeable battery during the pulse charge of 30s, detect and obtain the first voltage of rechargeable battery, second voltage with
First voltage and second voltage are carried out difference and polarization potential are calculated by state-of-charge, by the polarization potential being calculated with
Polarization potential threshold value is compared.Rechargeable battery is detected in 20s, SOC is first voltage and second corresponding to 30%
Difference in voltage reaches 1.2V, i.e. the polarization potential of rechargeable battery reaches 1.2V, determines that analysis takes place in 20s in rechargeable battery
Analysis lithium has occurred during the pulse charge of 30s in lithium, i.e. rechargeable battery.
Embodiment 13
The present embodiment is a kind of concrete methods of realizing of embodiment one.
In pure electric automobile operation, if rechargeable battery is carrying out electric discharge output energy, in the SOC state of rechargeable battery
When being 30%, the pulse charge of 30s is had occurred in rechargeable battery.At this point, the polarization potential threshold value of rechargeable battery is 1V.
Rechargeable battery during the pulse charge of 30s, detect and obtain the first voltage of rechargeable battery, second voltage with
First voltage and second voltage are carried out difference and polarization potential are calculated by state-of-charge, by the polarization potential being calculated with
Polarization potential threshold value is compared.Rechargeable battery is detected in 20s, SOC is first voltage and second corresponding to 30%
Difference in voltage reaches 1V, i.e. the polarization potential of rechargeable battery reaches 1V, determines that analysis lithium takes place in 20s in rechargeable battery, i.e.,
Analysis lithium has occurred during the pulse charge of 30s in rechargeable battery.
Embodiment 14
The present embodiment is a kind of concrete methods of realizing of embodiment one.
In the subway circulation using rechargeable battery as tractive force, if rechargeable battery is carrying out electric discharge output energy,
When the SOC state of rechargeable battery is 30%, the pulse charge of 30s is had occurred in rechargeable battery.At this point, the polarization potential of rechargeable battery
Threshold value is 1V.
Rechargeable battery during the pulse charge of 30s, detect and obtain the first voltage of rechargeable battery, second voltage with
First voltage and second voltage are carried out difference and polarization potential are calculated by state-of-charge, by the polarization potential being calculated with
Polarization potential threshold value is compared.Rechargeable battery is detected in 20s, SOC is first voltage and second corresponding to 30%
Difference in voltage reaches 1V, i.e. the polarization potential of rechargeable battery reaches 1V, determines that analysis lithium takes place in 20s in rechargeable battery, i.e.,
Analysis lithium has occurred during the pulse charge of 30s in rechargeable battery.
Embodiment 15
The present embodiment is a kind of concrete methods of realizing of embodiment one.
In the spacecraft operation using rechargeable battery as power source, if rechargeable battery is carrying out electric discharge output energy
Amount, when the SOC state of rechargeable battery is 30%, the pulse charge of 30s is had occurred in rechargeable battery.At this point, the pole of rechargeable battery
Change potential threshold is 1V.
Rechargeable battery during the pulse charge of 30s, detect and obtain the first voltage of rechargeable battery, second voltage with
First voltage and second voltage are carried out difference and polarization potential are calculated by state-of-charge, by the polarization potential being calculated with
Polarization potential threshold value is compared.Rechargeable battery is detected in 20s, SOC is first voltage and second corresponding to 30%
Difference in voltage reaches 1V, i.e. the polarization potential of rechargeable battery reaches 1V, determines that analysis lithium takes place in 20s in rechargeable battery, i.e.,
Analysis lithium has occurred during the pulse charge of 30s in rechargeable battery.
Embodiment 16
The detection method of the analysis of rechargeable battery provided by one lithium, the embodiment of the present invention further provide based on the above embodiment
Realize the system embodiment of each step and method in above method embodiment.Referring to FIG. 5, it is provided by the embodiment of the present invention
Battery management system functional block diagram.As shown in figure 5, the battery management system includes:
Detection module 51, for detecting the charging voltage of rechargeable battery during rechargeable battery carries out pulse charge
With state-of-charge, the charging voltage of rechargeable battery is as first voltage；
Module 52 is obtained, for obtaining state-of-charge from the corresponding relationship between preset open-circuit voltage and state-of-charge
Corresponding voltage value, using as second voltage；
Judgment module 53, for judging that rechargeable battery is during pulse charge according to first voltage and second voltage
Lithium is analysed in no generation.
In the embodiment of the present invention, battery management system further includes generation module 54:
Generation module 54, for generating the corresponding relationship between open-circuit voltage and state-of-charge.
Specifically, the judgment module 53 in the embodiment of the present invention, is specifically used for:
The difference between first voltage and second voltage is calculated, using the polarization electricity as rechargeable battery under state-of-charge
Position；
Polarization potential of the rechargeable battery under state-of-charge is compared with preset polarization potential threshold value；
If polarization potential of the rechargeable battery under state-of-charge is more than or equal to polarization potential threshold value, charging electricity is judged
Pond occurs to analyse lithium during pulse charge.
Specifically, in the embodiment of the present invention, the number of polarization potential is at least one, judgment module 53, also particularly useful for:
If rechargeable battery each polarization potential during pulse charge is both less than polarization potential threshold value, judge that rechargeable battery is filled in pulse
There is no analysing lithium in electric process.
In the embodiment of the present invention, battery management system further includes determining module 55, and determining module 55 is used for according to current temperature
Degree, determines the corresponding relationship under Current Temperatures between state-of-charge and polarization potential threshold value；And it is also used to according to Current Temperatures
Corresponding relationship between lower state-of-charge and polarization potential threshold value determines rechargeable battery corresponding polarization electricity under the state-of-charge
Position threshold value.
Method shown in FIG. 1 is able to carry out by each unit in this present embodiment, the part that the present embodiment is not described in detail,
It can refer to the related description to Fig. 1.
The technical solution of the embodiment of the present invention has the advantages that
Detection module in battery management system of the embodiment of the present invention passes through the process in rechargeable battery progress pulse charge
In, detect the charging voltage and state-of-charge of rechargeable battery, the charging voltage of rechargeable battery as first voltage, thus, battery
Acquisition module in management system obtains current state-of-charge from the corresponding relationship between preset open-circuit voltage and state-of-charge
Corresponding voltage value is using as second voltage, in turn, the judgment module in battery management system is according to first voltage and second
Voltage, judges whether rechargeable battery occurs to analyse lithium during pulse charge.The embodiment of the present invention is existed by detecting rechargeable battery
Charging voltage and state-of-charge during pulse charge, can determine whether rechargeable battery occurs to analyse lithium in real time, and the process is not
Need to destroy rechargeable battery, so as to avoid by dismantle battery observation judgement analysis lithium situation caused by judging result lag and
Situation complicated for operation, it is easy to operate since the embodiment of the present invention is capable of the analysis lithium situation of real-time detection rechargeable battery, it improves
Rechargeable battery analyses the detection efficiency of lithium, complicated for operation and detection when solving detection rechargeable battery analysis lithium situation in the prior art
Analyse the lower problem of the efficiency of lithium situation.
Embodiment 17
The embodiment of the present invention, which further provides, realizes that the battery system of each step and method is implemented in above method embodiment
Example.Referring to FIG. 6, its functional block diagram for battery system provided by the embodiment of the present invention.As shown in fig. 6, the battery system
System includes: rechargeable battery 60 and above-mentioned battery management system 61.
The part that the present embodiment is not described in detail can refer to the related description to Fig. 1, Fig. 5.
A technical solution in above-mentioned technical proposal has the following beneficial effects:
The embodiment of the present invention is by detecting the charging voltage of rechargeable battery during rechargeable battery carries out pulse charge
With state-of-charge, the charging voltage of rechargeable battery as first voltage, thus, between preset open-circuit voltage and state-of-charge
Corresponding relationship, voltage value corresponding to state-of-charge is obtained, using as second voltage, in turn, according to first voltage and second
Voltage, judges whether rechargeable battery occurs to analyse lithium during pulse charge.The embodiment of the present invention is existed by detecting rechargeable battery
Charging voltage and state-of-charge during pulse charge, can determine whether rechargeable battery occurs to analyse lithium in real time, and the process is not
Need to destroy rechargeable battery, so as to avoid by dismantle battery observation judgement analysis lithium situation caused by judging result lag and
Situation complicated for operation, it is easy to operate since the embodiment of the present invention is capable of the analysis lithium situation of real-time detection rechargeable battery, it improves
Rechargeable battery analyses the detection efficiency of lithium, complicated for operation and detection when solving detection rechargeable battery analysis lithium situation in the prior art
Analyse the lower problem of the efficiency of lithium situation.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided by the present invention, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or group
Part can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown
Or the mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, device or unit it is indirect
Coupling or communication connection can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of hardware adds SFU software functional unit.
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
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (9)
1. a kind of detection method of rechargeable battery analysis lithium, which is characterized in that the described method includes:
During rechargeable battery carries out pulse charge, the charging voltage and state-of-charge of the rechargeable battery are detected, it is described
The charging voltage of rechargeable battery is as first voltage；
Corresponding relationship between preset open-circuit voltage and state-of-charge obtains voltage value corresponding to the state-of-charge,
Using as second voltage；
Calculate the difference between the first voltage and the second voltage, using as the rechargeable battery in the state-of-charge
Under polarization potential；
Polarization potential of the rechargeable battery under the state-of-charge is compared with preset polarization potential threshold value；
If polarization potential of the rechargeable battery under the state-of-charge is more than or equal to the polarization potential threshold value, judgement
The rechargeable battery occurs to analyse lithium during pulse charge out.
2. the method according to claim 1, wherein the method also includes:
Generate the corresponding relationship between open-circuit voltage and state-of-charge.
3. the method according to claim 1, wherein the number of the polarization potential is at least one；
The method also includes:
If the rechargeable battery each polarization potential during the pulse charge is both less than the polarization potential threshold value, judge
There is no analysing lithium during pulse charge for the rechargeable battery.
4. the method according to claim 1, wherein the polarization by the rechargeable battery under the state-of-charge
Before current potential is compared with preset polarization potential threshold value, the method also includes:
According to Current Temperatures, the corresponding relationship under the Current Temperatures between state-of-charge and polarization potential threshold value is determined；
According to the corresponding relationship under the Current Temperatures between state-of-charge and polarization potential threshold value, determine that the rechargeable battery exists
Corresponding polarization potential threshold value under the state-of-charge.
5. a kind of battery management system, which is characterized in that the battery management system includes:
Detection module, for during rechargeable battery carries out pulse charge, detect the charging voltage of the rechargeable battery with
State-of-charge, the charging voltage of the rechargeable battery is as first voltage；
Module is obtained, for obtaining the state-of-charge institute from the corresponding relationship between preset open-circuit voltage and state-of-charge
Corresponding voltage value, using as second voltage；
Judgment module, for calculating the difference between the first voltage and the second voltage, using as the rechargeable battery
Polarization potential under the state-of-charge；By polarization potential of the rechargeable battery under the state-of-charge and preset pole
Change potential threshold to be compared；If polarization potential of the rechargeable battery under the state-of-charge is more than or equal to the pole
Change potential threshold, judges that the rechargeable battery occurs to analyse lithium during pulse charge.
6. battery management system according to claim 5, which is characterized in that the battery management system further includes generating mould
Block:
The generation module, for generating the corresponding relationship between open-circuit voltage and state-of-charge.
7. battery management system according to claim 5, which is characterized in that the number of the polarization potential is at least one
It is a；
The judgment module, if it is both less than described to be also used to the rechargeable battery each polarization potential during the pulse charge
Polarization potential threshold value, judging the rechargeable battery, there is no analysing lithium during pulse charge.
8. battery management system according to claim 5, which is characterized in that the battery management system further includes determining mould
Block:
The determining module, for according to Current Temperatures, determine under the Current Temperatures state-of-charge and polarization potential threshold value it
Between corresponding relationship；And it is also used to according to the corresponding pass under the Current Temperatures between state-of-charge and polarization potential threshold value
System, determines the rechargeable battery corresponding polarization potential threshold value under the state-of-charge.
9. a kind of battery system, which is characterized in that the electricity including rechargeable battery and as described in any one of claim 5 to 8
Pond management system.
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| KR20090094006A (en) * | 2006-12-26 | 2009-09-02 | 파나소닉 주식회사 | Non-aqueous electrolyte secondary battery charging method, electronic device, battery pack, and charging device |
| JP2010066232A (en) * | 2008-09-12 | 2010-03-25 | Toyota Motor Corp | Device for determining degradation of lithium ion battery, vehicle, and method of determining degradation of lithium ion battery |
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| EP4130767A4 (en) * | 2020-04-30 | 2023-05-24 | Huawei Technologies Co., Ltd. | Lithium plating detection method and apparatus, and polarization proportion acquisition method and apparatus |
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