CN110441692A - A kind of battery electric quantity exchange measuring method, device and storage medium - Google Patents
A kind of battery electric quantity exchange measuring method, device and storage medium Download PDFInfo
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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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- 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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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Abstract
The invention discloses a kind of battery electric quantity exchange measuring method, device and storage mediums, and the method comprising the steps of: obtaining the appraising model of battery electric quantity state；Obtain battery pack initial residual charge value and rated energy watt-hour number；Operating condition of the model in preset calculating cycle is obtained, and obtains the electric flux changing value of ammeter；Converter is obtained in the efficiency for charge-discharge of conversion efficiency and battery pack under operating condition under operating condition；The electric quantity change value of battery pack is obtained according to the electric flux changing value of ammeter, the conversion efficiency of converter and the efficiency for charge-discharge of battery pack；The new residual electric quantity of battery pack is obtained according to battery pack initial residual charge value, rated energy watt-hour number and electric quantity change value.Present invention only requires the efficiency for charge-discharges for reading variable quantity, converter conversion efficiency and battery pack for obtaining ammeter, then push away by the way that calculating is counter, can estimate and obtain battery electric quantity state, simple to operation, and measurement error is small.
Description
Technical field
It is measured the present invention relates to secondary battery and calculates technical field more particularly to a kind of battery electric quantity exchange measuring and calculating side
Method, device and storage medium.
Background technique
Currently, secondary cell (repeatable charge and discharge of the battery) large-scale application is in electric car and energy storage device, with
Adapt to environment-friendly type social development.And the accurate of the remaining capacity or state-of-charge (State of Charge, SOC) to battery is estimated
It calculates, is both the electric car most basic requirement of estimation course continuation mileage and promotes the basic of battery utilization efficiency and security performance
Guarantee.But the oil mass with fuel tank, reservoir water is different to be, SOC is not that one intuitive and the index of cubic content measurement, it with
The electrochemical properties tight association of battery, current main estimation side have: current integration method, open circuit voltage method, Kalman Filtering method
With neural network (back propagation, BP).Though evaluation method is more, big multiple error is big, measurement bothers, and secondary electricity
Pond could be mostly used in above electric car or energy storage by extensive in groups in series and parallel, and current evaluation method is mostly
Each monomer SOC is calculated based on single battery, represents whole group SOC further according to bucket effect COMPREHENSIVE CALCULATING value, estimation is caused to miss
Difference is larger.
Summary of the invention
The purpose of the embodiment of the present invention is that providing a kind of battery electric quantity exchange measuring method, device and storage medium, only
It needs to obtain the reading variable quantity of ammeter, the efficiency for charge-discharge of converter conversion efficiency and battery pack, then is pushed away by the way that calculating is counter, just
It can estimate and obtain battery electric quantity state, it is simple to operation, and measurement error is small.
To achieve the above object, the embodiment of the invention provides a kind of battery electric quantities to exchange measuring method, including following
Step:
Obtain battery electric quantity state appraising model, wherein the model include battery pack, converter, ammeter and for
Electric equipment, the input/output terminal of the battery pack are connect with the first input/output terminal of the converter, the converter
Second input/output terminal is connect with the electricity supply and use equipment, and the ammeter is arranged in the electricity supply and use equipment and the converter
Between, for measuring the electric flux to circulate between the converter and the electricity supply and use equipment；
Obtain the battery pack initial residual charge value and rated energy watt-hour number；
Operating condition of the model in preset calculating cycle is obtained, and obtains the electric flux variation of the ammeter
Value；
Obtain the converter under the operating condition conversion efficiency and the battery pack under the operating condition
Efficiency for charge-discharge；
It is imitated according to the charge and discharge of the electric flux changing value of the ammeter, the conversion efficiency of the converter and the battery pack
Rate obtains the electric quantity change value of the battery pack；
The battery pack is obtained according to the battery pack initial residual charge value, rated energy watt-hour number and electric quantity change value
New residual electric quantity；Wherein, the new residual electric quantity is the initial residual charge value of next calculating cycle.
Preferably, described to obtain the battery pack initial residual charge value and rated energy watt-hour number, it specifically includes:
The battery pack initial residual electricity is obtained by the factory calibration of the battery pack, manual calibration or current integration method
Magnitude；
The rated energy watt-hour number of the battery pack is obtained by the factory calibration of the battery pack.
Preferably, the conversion efficiency for obtaining the converter under the operating condition and the battery pack are described
Efficiency for charge-discharge under operating condition, specifically includes:
According to the curve that the conversion efficiency of the converter changes under different operating conditions, the converter is obtained in the fortune
Conversion efficiency under row operating condition；
According to the curve that the efficiency for charge-discharge of the battery pack changes under different operating conditions, the battery pack is obtained described
Efficiency for charge-discharge under operating condition.
Preferably, the operating condition for obtaining the model in preset calculating cycle, and obtain the ammeter
Electric flux changing value, specifically includes:
Operating condition of the model in preset calculating cycle is obtained, and obtains the positive electric flux of the ammeter
The electric flux changing value of changing value and negative sense；Wherein, when positive electric flux changing value is that the battery pack is in internally charging,
The electric flux changing value that the ammeter forward direction measures；The electric flux changing value of negative sense is that the battery pack is in externally electric discharge
When, electric flux changing value that the ammeter negative sense measures.
Preferably, described according to the electric flux changing value of the ammeter, the conversion efficiency of the converter and the battery
The efficiency for charge-discharge of group obtains the electric quantity change value of the battery pack, specifically includes:
According to the electric flux changing value of the ammeter forward direction multiplied by the conversion efficiency and the battery pack of the converter
The product of efficiency for charge-discharge obtains the electric quantity change value of the battery pack forward direction；
According to the electric flux changing value of the ammeter negative sense and the conversion efficiency of the converter and filling for the battery pack
The ratio of discharging efficiency product obtains the electric quantity change value of the battery pack negative sense.
Preferably, described to be worth according to the battery pack initial residual charge value, rated energy watt-hour number and electric quantity change
To the new residual electric quantity of the battery pack, specifically include:
Remaining capacity is obtained according to the ratio of the electric quantity change value of the battery pack forward direction and the rated energy watt-hour number
The incrementss of value；
Remaining capacity is obtained according to the ratio of the electric quantity change value of the battery pack negative sense and the rated energy watt-hour number
The reduction amount of value；
The reduction amount of the incrementss, the residual electric quantity that are worth according to the residual electric quantity and the initial residual charge value
Obtain the new residual electric quantity of the battery pack.
The embodiment of the present invention also provides a kind of battery electric quantity exchange measuring and calculating device, comprising:
Model obtain module, for obtaining the appraising model of battery electric quantity state, wherein the model include battery pack,
Converter, ammeter and electricity supply and use equipment, the first input/output terminal of the input/output terminal of the battery pack and the converter
Connection, the second input/output terminal of the converter are connect with the electricity supply and use equipment, and the ammeter is arranged described for electricity consumption
Between equipment and the converter, for measuring the electric flux to circulate between the converter and the electricity supply and use equipment；
Parameter acquisition module, for obtaining the battery pack initial residual charge value and rated energy watt-hour number；
Module is run, for obtaining operating condition of the model in preset calculating cycle, and obtains the ammeter
Electric flux changing value；
Efficiency obtains module, for obtaining conversion efficiency and the battery pack of the converter under the operating condition
Efficiency for charge-discharge under the operating condition；
Electricity computing module, for according to the electric flux changing value of the ammeter, the conversion efficiency of the converter and institute
The efficiency for charge-discharge for stating battery pack obtains the electric quantity change value of the battery pack；
As a result module is obtained, for becoming according to the battery pack initial residual charge value, rated energy watt-hour number and electricity
Change is worth to obtain the new residual electric quantity of the battery pack；Wherein, the new residual electric quantity is the first of next calculating cycle
Beginning residual electric quantity.
Another embodiment of the present invention is corresponding to provide a kind of device using battery electric quantity exchange measuring method, including processing
Device, memory and storage in the memory and are configured as the computer program executed by the processor, the place
Reason device realizes battery electric quantity exchange measuring method described in any of the above embodiments when executing the computer program.
The embodiment of the present invention also provides a kind of computer readable storage medium, and the computer readable storage medium includes depositing
The computer program of storage, wherein equipment where controlling the computer readable storage medium in computer program operation
Execute battery electric quantity exchange measuring method described in any of the above embodiments.
Compared with prior art, a kind of exchange of battery electric quantity provided by embodiment of the present invention measuring method, device and
Storage medium estimates whole group battery based on integral battery storing electricity, has evaded single battery measurement because of drift, temperature
Various measurement error factors such as drift, integral accumulation cause inaccurate and DC measurement element expensive and the factors such as precision is low, existing
There is the estimation error of technology mostly 10% or more, and it is about 3% that the present invention, which calculates error, estimation precision is higher, and scheme
It only needs to read ammeter reading, obtain transducer effciency and battery set charge/discharge efficiency, it is simple to operation, it is at low cost, it fits
It is wide with operating condition, it can be suitably used for fierce variation, power overturning, the operating conditions such as underload, because the design of ammeter can be well adapted for
These scenes, under these operating conditions, converter conversion efficiency can be carried out by the detailed conversion efficiency error correction model of producer
Improve, the efficiency for charge-discharge of battery pack also can be by the curve acquisition that changes under different operating conditions.The present invention can be by putting certainly simultaneously
The estimations such as electric rate, average leakage rate obtain battery standing, self discharge for a long time, electricity caused by the extra factors such as electric leakage multiplied by the time
Amount loss, so that amendment obtains accurate SOC or SOE.
Detailed description of the invention
Fig. 1 is a kind of flow diagram for battery electric quantity exchange measuring method that the embodiment of the present invention 1 provides.
Fig. 2 is the schematic diagram of battery electric quantity state appraising model provided in an embodiment of the present invention.
Fig. 3 is the schematic diagram that secondary cell provided in an embodiment of the present invention is applied to energy-storage system.
When Fig. 4 is that battery pack provided by the invention is in internal charged state, the electricity distribution schematic diagram of model.
When Fig. 5 is that battery pack provided by the invention is in external discharge condition, the electricity distribution schematic diagram of model.
Fig. 6 is a kind of structural schematic diagram for battery electric quantity exchange measuring and calculating device that the embodiment of the present invention 2 provides.
Fig. 7 is a kind of schematic diagram for device using battery electric quantity exchange measuring method that the embodiment of the present invention 3 provides.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It is a kind of flow diagram for battery electric quantity exchange measuring method that the embodiment of the present invention 1 provides referring to Fig. 1,
The method includes the steps S1 to step S6:
S1, the appraising model for obtaining battery electric quantity state, wherein the model includes battery pack, converter, ammeter and confession
Electrical equipment, the input/output terminal of the battery pack are connect with the first input/output terminal of the converter, the converter
The second input/output terminal connect with the electricity supply and use equipment, the ammeter is arranged in the electricity supply and use equipment and the transformation
Between device, for measuring the electric flux to circulate between the converter and the electricity supply and use equipment；
S2, the battery pack initial residual charge value and rated energy watt-hour number are obtained；
S3, operating condition of the model in preset calculating cycle is obtained, and obtains the electric energy quantitative change of the ammeter
Change value；
S4, conversion efficiency and the battery pack of the converter under the operating condition are obtained in the operating condition
Under efficiency for charge-discharge；
S5, according to the electric flux changing value of the ammeter, the charge and discharge of the conversion efficiency of the converter and the battery pack
Electrical efficiency obtains the electric quantity change value of the battery pack；
S6, the electricity is obtained according to the battery pack initial residual charge value, rated energy watt-hour number and electric quantity change value
The residual electric quantity of Chi Zuxin；Wherein, the new residual electric quantity is the initial residual charge value of next calculating cycle.
It should be noted that Fig. 2 is the schematic diagram of the appraising model of battery electric quantity state provided in an embodiment of the present invention, by
Fig. 2 it is found that single battery generally require it is series-parallel in groups after connect again by converter with electricity supply and use equipment, be then re-used as one
A entirety accesses external system.Wherein, when battery pack is applied in energy-storage system, electricity supply and use equipment is power grid；When battery pack is answered
For in electric car, electricity supply and use equipment to be motor.Converter can be DC/AC converter or current transformer or motor driver.
It is the schematic diagram that secondary cell provided in an embodiment of the present invention is applied to energy-storage system referring to Fig. 3, secondary cell is applied to electronic
The schematic diagram of automobile is also similar, and only power grid changes motor into.From the figure 3, it may be seen that in energy-storage system, it is general first multiple low-pressure directs
The single battery of stream is connected into high voltage direct current battery module, then by several high voltage direct current battery wired in parallel at battery pile, group
At battery pack, internal direct current electricity is then converted to by grid-connected inverter PCS by alternating current and externally discharges or is changed by grid-connected
External communication electricity is converted to direct current and internally charges by stream device PCS, thus the circuit of charge and discharge be mainly energy-storage battery group, it is grid-connected
Inverter, transformer and power grid.As for Monitoring and control system, generally powered with alternating current 220V.When battery pack is applied to electronic
When automobile, due to not having alternating current source, Monitoring and control system generally uses the auxiliary power supply structure of similar gasoline car, i.e., all
Auxiliary electricity consumption is all powered by lead-acid battery storage battery, unrelated with battery pack, that is, secondary cell, that is to say, that normal in secondary cell
Energy-storage system and electric car field, the electricity consumption of Monitoring and control system do not have to calculate the alternating current meter in PCS exchange side
In number, without the corresponding loss of consideration.Therefore, secondary cell practical application can be equivalent to the appraising model of Fig. 2, In
Ammeter is added between electricity supply and use equipment and inverter, to measure the circulation electric flux between electricity supply and use equipment and inverter, then pushes away
Calculate the state of charge of battery pack.Of course it is not excluded certain special occasions, that is, no external auxiliary electricity consumption occasion, monitoring and control
System needs take electricity from battery pack, at this time need the no-load standby loss calculation of Monitoring and control system and PCS in electricity
Pond group is lost in electric energy.In addition, battery pack has part energy when Monitoring and control system opens active or passive equilibrium
Amount is transferred or is fallen by resistance consumption, has additional loss, excess loss is at this moment also required to take into account.But it is overall
For, these auxiliary electricity loss be all it is relatively-stationary, calculate when added and subtracted, less influence battery pack electricity
State estimation precision, it is seen that evaluation method of the invention is effective and feasible.
Specific step is as follows for a kind of battery electric quantity exchange measuring method that the embodiment of the present invention 1 provides:
The appraising model of battery electric quantity state is obtained first, and for details, reference can be made to Fig. 2.Generally, model includes battery pack, becomes
Parallel operation, ammeter and electricity supply and use equipment, battery pack are made of in series and parallel multiple single batteries.The input/output terminal and change of battery pack
First input/output terminal of parallel operation connects, and the second input/output terminal of converter is connect with electricity supply and use equipment.Ammeter setting exists
Electric flux between electricity supply and use equipment and converter, for circulating between measurement translator and electricity supply and use equipment.The model is
In order to facilitate understanding, in practical application, it is only necessary to add AC ammeter between electricity supply and use equipment and converter.Ammeter is
AC ammeter, it is not only cheap, and also measurement accuracy is high, provides premise item to reduce battery electric quantity exchange measuring and calculating error
Part.When what is added is I class electric energy metering device, the class of accuracy of the power electric meter used is not less than 0.5 grade, that is, precision
Not less than 0.5%.Converter is not more than ± 2% in the error of firm demand rate down conversion efficiency, battery electric quantity exchange measuring and calculating
Error is about 3%.
Battery electric quantity state is estimated, ought to first understand the current state of charge of battery pack, to be compared, institute
To obtain battery pack initial residual charge value and rated energy watt-hour number.Generally, battery capacity is estimated using this method for the first time
State, is subject to the calibration of battery pack, i.e., and 0% or 100%, when estimating next time, battery pack initial residual charge value
The new residual electric quantity of obtained battery pack is estimated using this.
After understanding and understanding the structure situation of model, so that it may obtain operation work of the model in preset calculating cycle
Condition, to obtain the variable quantity of ammeter reading, i.e. the electric flux changing value of ammeter.Ammeter is bidirectional measuring ammeter, can read battery
It flows to the electric flux of electricity supply and use equipment from converter when group electric discharge and reads to flow to when battery pack charges from electricity supply and use equipment and become
The electric flux of parallel operation.
As shown in Figure 2, the electricity of all disengaging battery packs, in addition to partition losses are in converter and battery pack self-heating etc.
Except, remaining whole passes through route where ammeter, can be accurately measured by ammeter come.Although converter is under fixed operating condition
It is metastable, but its conversion efficiency will be different under different operating conditions, so to obtain converter under default operating condition
Conversion efficiency, just can know that in this way loss converter electric flux how many.Similarly, since in charge and discharge process, battery
Group leads to kwh loss, efficiency for charge-discharge will not be 100%, therefore be also required to know because the factor of itself internal resistance can generate heat
Efficiency for charge-discharge of the battery pack under default operating condition, just can know that and electric flux is lost caused by battery pack self-heating.
Battery pack is obtained according to the electric flux changing value of ammeter, the conversion efficiency of converter and the efficiency for charge-discharge of battery pack
Electric quantity change value.There is the electric flux changing value of ammeter, so that it may according to the charge and discharge of the conversion efficiency of converter and battery pack
Electrical efficiency knows battery pack in the electric quantity change value of charge and discharge process.
The electricity shape of battery pack is obtained according to battery pack initial residual charge value, rated energy watt-hour number and electric quantity change value
State value.By the changing value of electric quantity change value and the available residual electric quantity of rated energy watt-hour number, by the change of residual electric quantity
Change value and initial residual charge value can be obtained by the new residual electric quantity of battery pack, the i.e. state of charge of battery pack.In addition, adopting
The new residual electric quantity of one-shot battery group was obtained with this method, which can serve as next calculating week
The initial residual charge value of phase is constantly estimated the state of charge of battery pack with this, then hereafter no longer needs to obtain by additional method
Battery pack initial residual charge value.
The embodiment of the present invention 1 provide method and the prior art evaluation method include current integration method, open circuit voltage method,
There is no conflicts for Kalman Filtering method and neural network, realize that upper needs to add between electricity supply and use equipment and converter in scheme
If this method and the prior art can be used in combination by an ammeter in practical applications, preferably to estimate battery
State of charge.
The embodiment of the present invention 1 is based on integral battery storing electricity and estimates whole group battery, has evaded single battery survey
The factors such as amount is inaccurate, and DC measurement element is expensive and precision is low add ammeter by the exchange side in converter and carry out electricity
Measurement retrodicts out battery total charge state, to improve the precision of estimation battery electric quantity state, reduces measurement error.
It is as an improvement of the above scheme, described to obtain the battery pack initial residual charge value and rated energy watt-hour number,
It specifically includes:
The battery pack initial residual electricity is obtained by the factory calibration of the battery pack, manual calibration or current integration method
Magnitude；
The rated energy watt-hour number of the battery pack is obtained by the factory calibration of the battery pack.
It should be noted that battery charge state (State of Charge, SOC), is also remaining capacity, representative is
Battery lie idle using a period of time or for a long time after it is remaining can discharge electricity amount and its fully charged state electricity ratio,
Percentage 0%~100% is commonly used to indicate.Indicate that battery discharge is complete, indicates battery as SOC=100% as SOC=0
It is completely filled with.The state of charge value for the battery pack that the embodiment of the present invention 1 is calculated is particularly battery power amount state
(state of energy, SOE), rather than general SOC, but can by demarcate battery rated energy method this two
Person unites.Generally, SOC define in charge value unit be Ah, and the battery pack that the embodiment of the present invention 1 is calculated
The unit of energy value is kWh or Wh, and the poor multiplier of a battery pack voltage rating of the two is specified with voltage rating 3.2V
For the battery pack of capacity 100Ah, theoretically the energy value of battery pack may be considered 320Wh.In new country and industry storage
In energy standard, it is recommended that measuring the saying for the usual battery capacity of general battery industry, i.e. SOE using battery rated power
Substitute SOC.
Specifically, battery pack initial residual electricity is obtained by the factory calibration of battery pack, manual calibration or current integration method
Magnitude.Initial residual charge value is percentage, the meaning of expression be exactly battery pack currently can discharge electricity amount with it be completely filled with electricity
The ratio of the electricity of state.Generally, battery electric quantity state is estimated using this method for the first time, with the factory calibration of battery pack or school
Subject to standard, i.e., initial residual charge value is 0% or 100%.When battery pack has used a period of time, initial residual charge value is in
Between 0% or 100%, then it can be solved by current integration method, open circuit voltage method, Kalman Filtering method and neural network
It obtains.But when estimating next time, the battery pack that battery pack initial residual charge value can use this estimation to obtain is new to be remained
Remaining charge value, the two meaning is the same, is percentage.The calibration (calibration) of battery pack is generally referred to as to battery pack
The operation for being full of or being given out light, usual every half a year or one-year age carry out once, when the SOC deviation of battery pack is larger or battery
When consistency is poor, calibration operation is carried out by professional.
The rated energy watt-hour number of battery pack is obtained by the factory calibration of battery pack.The rated energy watt-hour number of battery pack
Carried out when battery producer can be required to dispatch from the factory it is dated, i.e., battery producer dispatch from the factory when in addition to indicate rated capacity ampere-hour number Ah, also need
Indicate rated energy watt-hour number Wh.So, so that it may according to the electric quantity change value of battery pack and rated energy watt-hour number
Ratio obtain battery pack remaining capacity changing value, obtain new residual electric quantity in conjunction with initial residual charge value, i.e.,
The state of charge value of battery pack.Because what a battery pack can be issued or be absorbed in single charge and discharge process under same operating
Electric flux is fixed, so the state of charge value of battery pack just as the meaning of SOC, can obtain the residue electricity of battery pack
Amount, to understand the cruising ability of battery pack.
The state of charge value and SOC actual value for the battery pack that this method measures may be deviated, because battery is charging
Or in discharge process, voltage is not stablized constant, but has fluctuation, should by taking voltage rating is the lithium battery group of 3.2V as an example
Process may change from 3.4V to 2.8V, not rest on 3.2V always.But no matter how voltage changes, and a battery is in single
The electric flux that can be issued or absorb in charge and discharge process is fixed, so influencing little.
As an improvement of the above scheme, the conversion efficiency for obtaining the converter under the default operating condition and described
Efficiency for charge-discharge of the battery pack under the default operating condition, specifically includes:
According to the curve that the conversion efficiency of the converter changes under different operating conditions, the converter is obtained described pre-
If the conversion efficiency under operating condition；
According to the curve that the efficiency for charge-discharge of the battery pack changes under different operating conditions, the battery pack is obtained described
Efficiency for charge-discharge under default operating condition.
Specifically, the measurement error of the worst error source not instead of ammeter of method provided in an embodiment of the present invention becomes
The conversion efficiency of parallel operation and the efficiency for charge-discharge of battery pack.The conversion efficiency of converter is under the conditions of certain voltage and current temperature
It is relatively stable, it can be obtained by experiment method, by taking discharge process as an example, electric flux is from DC side to exchange side, calculation formula are as follows:
Conversion efficiency=converter exchange side energy/converter DC side energy=1- transducer loose energy/converter direct current
The energy of side, defaulting converter here is DC/AC converter.The conversion efficiency of converter can also be according to it under different operating conditions
The curve of variation obtains, and by searching for converter, corresponding conversion efficiency can obtain the transformation effect of converter under default operating condition
Rate.When the conversion efficiency to converter has an impact when charge and discharge direction, consideration amendment should be added.
In addition, battery pack is in charge and discharge process, because the factor of internal resistance itself can generate heat, but this loss value is smaller,
General 2% or so, this loss value again may be by default operating condition and obtain, and specially be existed according to the efficiency for charge-discharge of battery pack
The curve changed under different operating conditions obtains efficiency for charge-discharge of the battery pack under default operating condition.
As an improvement of the above scheme, the operating condition for obtaining the model in preset calculating cycle, and obtain
The electric flux changing value for taking the ammeter, specifically includes:
Operating condition of the model in preset calculating cycle is obtained, and obtains the positive electric flux of the ammeter
The electric flux changing value of changing value and negative sense；Wherein, when positive electric flux changing value is that the battery pack is in internally charging,
The electric flux changing value that the ammeter forward direction measures；The electric flux changing value of negative sense is that the battery pack is in externally electric discharge
When, electric flux changing value that the ammeter negative sense measures.
Specifically, generally, battery pack can need not timing to charge and discharge process according to operation, it is therefore desirable to obtain
Operating condition of the modulus type in preset calculating cycle, to obtain the electric energy of the positive electric flux changing value and negative sense of ammeter
Measure changing value.Wherein, positive electric flux changing value is battery pack in the electric flux that when internally charging, ammeter forward direction is measured
Changing value；The electric flux changing value of negative sense is battery pack in the electric flux changing value that when externally discharging, ammeter negative sense is measured.
Here be positively and negatively intended merely to convenience of calculation, it is artificial as defined in, technical solution is not constituted and is limited.
As an improvement of the above scheme, the transformation of the electric flux changing value, the converter according to the ammeter is imitated
The efficiency for charge-discharge of rate and the battery pack obtains the electric quantity change value of the battery pack, specifically includes:
According to the electric flux changing value of the ammeter forward direction multiplied by the conversion efficiency and the battery pack of the converter
The product of efficiency for charge-discharge obtains the electric quantity change value of the battery pack forward direction；
According to the electric flux changing value of the ammeter negative sense and the conversion efficiency of the converter and filling for the battery pack
The ratio of discharging efficiency product obtains the electric quantity change value of the battery pack negative sense.
Specifically, when battery pack internally charges, electricity supply and use equipment charges to battery pack, the electric flux of electricity supply and use equipment release
That is the electric flux that measures of ammeter will give a discount by the loss of battery pack and converter, could become the electricity of internal battery pack,
So the electric flux changing value of ammeter forward direction is bigger than the electric quantity change value of battery pack forward direction, numerical relation is the electricity of ammeter forward direction
Energy change value × (η1η2The electric quantity change value of)=battery pack forward direction, wherein η1Indicate transformation of the converter under operating condition
Efficiency, η2Indicate efficiency for charge-discharge of the battery pack under operating condition.It referring to fig. 4, is battery pack provided in an embodiment of the present invention
Internally when charging, the electricity distribution schematic diagram of model, i.e. electric flux changing value+battery pack own loss electricity of battery pack forward direction
Energy+transducer loose electric flux is equal to the electric flux changing value of ammeter forward direction, that is to say, that according to the electric energy of ammeter forward direction
Amount changing value becomes multiplied by the electricity that the product of the conversion efficiency of converter and the efficiency for charge-discharge of battery pack obtains battery pack forward direction
Change value.
When battery pack is externally discharged, the electric flux of battery pack release will give a discount by the loss of battery pack and converter,
It can be measured by ammeter, so the electric flux changing value of ammeter negative sense is worth small, numerical value pass than the electric quantity change of battery pack negative sense
System is electric flux changing value/(η of ammeter negative sense1η2The electric quantity change value of)=battery pack negative sense, wherein η1Indicate that converter exists
Conversion efficiency under default operating condition, η2Indicate efficiency for charge-discharge of the battery pack under default operating condition.It is of the invention real referring to Fig. 5
The battery pack of example offer is applied when externally discharging, the electricity distribution schematic diagram of model, i.e. the electric flux changing value etc. of battery pack negative sense
In electric flux+transducer loose electric flux+ammeter negative sense electric flux changing value of battery pack own loss, that is to say, that
It is worth according to the ratio of the efficiency for charge-discharge product of the conversion efficiency and battery pack of the electric flux changing value of ammeter negative sense and converter
To the electric quantity change value of battery pack negative sense.
As an improvement of the above scheme, it is described according to the battery pack initial residual charge value, rated energy watt-hour number and
Electric quantity change value obtains the new residual electric quantity of the battery pack, specifically includes:
Remaining capacity is obtained according to the ratio of the electric quantity change value of the battery pack forward direction and the rated energy watt-hour number
The incrementss of value；
Remaining capacity is obtained according to the ratio of the electric quantity change value of the battery pack negative sense and the rated energy watt-hour number
The reduction amount of value；
The reduction amount of the incrementss, the residual electric quantity that are worth according to the residual electric quantity and the initial residual charge value
Obtain the new residual electric quantity of the battery pack.
Specifically, residual electric quantity is obtained according to the ratio of the electric quantity change value of battery pack forward direction and rated energy watt-hour number
Incrementss, that is, according to the ratio of the battery pack electricity internally to charge and the rated energy watt-hour number of battery pack, be known that
The percentage for the total electricity that the electricity that battery pack internally charges accounts for battery pack when expiring electric, to be known that the remaining capacity of battery pack
Value increases how many.
The reduction of residual electric quantity is obtained according to the ratio of the electric quantity change value of battery pack negative sense and rated energy watt-hour number
Amount, that is, according to the ratio of the battery pack electricity externally to discharge and the rated energy watt-hour number of battery pack, it is known that battery pack
The percentage for the total electricity that the electricity externally to discharge accounts for battery pack when expiring electric, to be known that the residual electric quantity of battery pack is reduced
It is how many.
The incrementss of obtained residual electric quantity, the reduction amount of residual electric quantity and initial residual charge value are added again
Subtract operation, the new residual electric quantity of battery pack, the i.e. state of charge of battery pack can be obtained.
It is a kind of battery electric quantity exchange measuring and calculating device that the embodiment of the present invention 2 provides referring to Fig. 6, described device includes:
Model obtains module 11, for obtaining the appraising model of battery electric quantity state, wherein the model includes battery
Group, converter, ammeter and electricity supply and use equipment, the first input/output of the input/output terminal of the battery pack and the converter
End connection, the second input/output terminal of the converter connect with the electricity supply and use equipment, the ammeter be arranged it is described for
Between electric equipment and the converter, for measuring the electric flux to circulate between the converter and the electricity supply and use equipment；
Parameter acquisition module 12, for obtaining the battery pack initial residual charge value and rated energy watt-hour number；
Module 13 is run, for obtaining operating condition of the model in preset calculating cycle, and obtains the electricity
The electric flux changing value of table；
Efficiency obtains module 14, for obtaining conversion efficiency and the battery of the converter under the operating condition
Efficiency for charge-discharge of the group under the operating condition；
Electricity computing module 15, for according to the electric flux changing value of the ammeter, the conversion efficiency of the converter and
The efficiency for charge-discharge of the battery pack obtains the electric quantity change value of the battery pack；
As a result module 16 is obtained, for according to the battery pack initial residual charge value, rated energy watt-hour number and electricity
Changing value obtains the new residual electric quantity of the battery pack；Wherein, the new residual electric quantity is next calculating cycle
Initial residual charge value.
Preferably, the parameter acquisition module 12 specifically includes:
Remaining capacity acquiring unit, for being obtained by factory calibration, manual calibration or the current integration method of the battery pack
Take the battery pack initial residual charge value；
Rated energy acquiring unit obtains the rated energy of the battery pack for the factory calibration by the battery pack
Watt-hour number
Preferably, the efficiency obtains module 14 and specifically includes:
First efficiency acquiring unit, for the curve that the conversion efficiency according to the converter changes under different operating conditions,
Obtain conversion efficiency of the converter under the default operating condition；
Second efficiency acquiring unit, the song changed under different operating conditions for the efficiency for charge-discharge according to the battery pack
Line obtains efficiency for charge-discharge of the battery pack under the default operating condition.
Preferably, the operation module 13 is specifically used for:
Operating condition of the model in preset calculating cycle is obtained, and obtains the positive electric flux of the ammeter
The electric flux changing value of changing value and negative sense；Wherein, when positive electric flux changing value is that the battery pack is in internally charging,
The electric flux changing value that the ammeter forward direction measures；The electric flux changing value of negative sense is that the battery pack is in externally electric discharge
When, electric flux changing value that the ammeter negative sense measures.
Preferably, the electricity computing module 15 specifically includes:
Positive electricity computing unit, for the change according to the electric flux changing value of the ammeter forward direction multiplied by the converter
The product for changing the efficiency for charge-discharge of efficiency and the battery pack obtains the electric quantity change value of the battery pack forward direction；
Negative sense electricity computing unit, for the transformation according to the electric flux changing value of the ammeter negative sense and the converter
The ratio of the efficiency for charge-discharge product of efficiency and the battery pack obtains the electric quantity change value of the battery pack negative sense.
Preferably, the result obtains module 16 and specifically includes:
First computing unit, for according to the electric quantity change value of the battery pack forward direction and the rated energy watt-hour number
Ratio obtains the incrementss of residual electric quantity；
Second computing unit, for according to the electric quantity change value of the battery pack negative sense and the rated energy watt-hour number
Ratio obtains the reduction amount of residual electric quantity；
Third computing unit, the reduction amount of incrementss, the residual electric quantity for being worth according to the residual electric quantity and
The initial residual charge value obtains the new residual electric quantity of the battery pack.
A kind of exchange measuring and calculating device of battery electric quantity provided by the embodiment of the present invention can be realized any of the above-described embodiment
All processes of the described battery electric quantity exchange measuring method, the effects of modules, unit in device and realization
Technical effect exchanges the technical effect of effect and the realization of measuring method with battery electric quantity described in above-described embodiment respectively
Correspondence is identical, and which is not described herein again.
It is a kind of showing for device using battery electric quantity exchange measuring method that the embodiment of the present invention 3 provides referring to Fig. 7
It is intended to, the device using battery electric quantity exchange measuring method includes processor 10, memory 20 and is stored in described
In memory 20 and it is configured as the computer program executed by the processor 10, the processor 10 executes the computer
Realize that battery electric quantity described in any of the above-described embodiment exchanges measuring method when program.
Illustratively, computer program can be divided into one or more module/units, and one or more module/
Unit is stored in memory 20, and is executed by processor 10, to complete the present invention.One or more module/units can be with
It is the series of computation machine program instruction section that can complete specific function, the instruction segment is for describing computer program in a kind of electricity
Pond group electricity exchanges the implementation procedure in measuring method.For example, computer program, which can be divided into model, obtains module, parameter
It obtains module, operation module, efficiency to obtain module, electricity computing module and result and obtain module, each module concrete function is as follows:
Model obtains module 11, for obtaining the appraising model of battery electric quantity state, wherein the model includes battery
Group, converter, ammeter and electricity supply and use equipment, the first input/output of the input/output terminal of the battery pack and the converter
End connection, the second input/output terminal of the converter connect with the electricity supply and use equipment, the ammeter be arranged it is described for
Between electric equipment and the converter, for measuring the electric flux to circulate between the converter and the electricity supply and use equipment；
Parameter acquisition module 12, for obtaining the battery pack initial residual charge value and rated energy watt-hour number；
Module 13 is run, for obtaining operating condition of the model in preset calculating cycle, and obtains the electricity
The electric flux changing value of table；
Efficiency obtains module 14, for obtaining conversion efficiency and the battery of the converter under the operating condition
Efficiency for charge-discharge of the group under the operating condition；
Electricity computing module 15, for according to the electric flux changing value of the ammeter, the conversion efficiency of the converter and
The efficiency for charge-discharge of the battery pack obtains the electric quantity change value of the battery pack；
As a result module 16 is obtained, for according to the battery pack initial residual charge value, rated energy watt-hour number and electricity
Changing value obtains the new residual electric quantity of the battery pack；Wherein, the new residual electric quantity is next calculating cycle
Initial residual charge value.
The device using battery electric quantity exchange measuring method can be desktop PC, notebook, palm electricity
Brain and cloud server etc. calculate equipment.The device using battery electric quantity exchange measuring method may include, but not only limit
In processor, memory.It will be understood by those skilled in the art that schematic diagram 6 is only a kind of using battery electric quantity exchange survey
The example of the device of calculation method does not constitute the restriction to the device using battery electric quantity exchange measuring method, can be with
Including than illustrating more or fewer components, perhaps combining certain components or different components, such as described use battery pack
The device that electricity exchanges measuring method can also include input-output equipment, network access equipment, bus etc..
Processor 10 can be central processing unit (Central Processing Unit, CPU), can also be other
General processor, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or processor 10 is also possible to any conventional processor
It is the control centre of the device using battery electric quantity exchange measuring method Deng, processor 10, utilizes various interfaces and line
Road connection is entirely using the various pieces of the device of battery electric quantity exchange measuring method.
Memory 20 can be used for storing the computer program and/or module, and processor 10 is by operation or executes storage
Computer program and/or module in memory 20, and the data being stored in memory 20 are called, realize the use
Battery electric quantity exchanges the various functions of the device of measuring method.Memory 20 can mainly include storing program area and storing data
Area, wherein storing program area can application program needed for storage program area, at least one function (such as sound-playing function,
Image player function etc.) etc.；Storage data area, which can be stored, uses created data (such as audio data, electricity according to mobile phone
Script for story-telling etc.) etc..In addition, memory 20 may include high-speed random access memory, it can also include nonvolatile memory, example
Such as hard disk, memory, plug-in type hard disk, intelligent memory card (Smart Media Card, SMC), secure digital (Secure
Digital, SD) card, flash card (Flash Card), at least one disk memory, flush memory device or other volatibility are solid
State memory device.
Wherein, if the integrated module of the device using battery electric quantity exchange measuring method is with SFU software functional unit
Form realize and when sold or used as an independent product, can store in a computer readable storage medium.
Based on this understanding, the present invention realizes all or part of the process in above-described embodiment method, can also pass through computer journey
Sequence is completed to instruct relevant hardware, and above-mentioned computer program can be stored in a computer readable storage medium, the meter
Calculation machine program is when being executed by processor, it can be achieved that the step of above-mentioned each embodiment of the method.Wherein, above-mentioned computer program packet
Computer program code is included, computer program code can be source code form, object identification code form, executable file or certain
Intermediate form etc..Computer-readable medium may include: any entity or device, record that can carry computer program code
Medium, USB flash disk, mobile hard disk, magnetic disk, CD, computer storage, read-only memory (ROM, Read-Only Memory), with
Machine access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium etc..
It should be noted that the content that computer-readable medium includes can be according to the requirement made laws in jurisdiction with patent practice
Increase and decrease appropriate is carried out, such as does not include electricity according to legislation and patent practice, computer-readable medium in certain jurisdictions
Carrier signal and telecommunication signal.
The embodiment of the invention also provides a kind of computer readable storage medium, the computer readable storage medium includes
The computer program of storage, wherein control in computer program operation and set where the computer readable storage medium
It is standby to execute the exchange measuring method of battery electric quantity described in any of the above-described embodiment.
To sum up, a kind of exchange of battery electric quantity provided by embodiment of the present invention measuring method, device and storage medium, base
Whole group battery is estimated in integral battery storing electricity, has evaded single battery measurement because of drift, temperature drift, integral accumulation
Cause inaccurate and DC measurement element expensive and the factors such as precision is low etc. various measurement error factors, the estimation of the prior art
Error is mostly 10% or more, and it is about 3% that the present invention, which calculates error, and estimation precision is higher, and scheme only needs to read electricity
Meter reading obtains transducer effciency and battery set charge/discharge efficiency, and simple to operation, at low cost, applicable working condition is wide, can fit
Change for fierceness, power overturning, the operating conditions such as underload, because the design of ammeter can be well adapted for these scenes, at this
Under a little operating conditions, converter conversion efficiency can be improved by the detailed conversion efficiency error correction model of producer, battery pack
Efficiency for charge-discharge also can be by the curve acquisition that changes under different operating conditions.The present invention can pass through self-discharge rate, average electric leakage simultaneously
The estimation such as rate obtains battery standing, self discharge for a long time, electric quantity loss caused by the extra factors such as electric leakage, to repair multiplied by the time
Just obtaining accurate SOC or SOE.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (9)
1. a kind of battery electric quantity exchanges measuring method, which comprises the following steps:
Obtain the appraising model of battery electric quantity state, wherein the model includes battery pack, converter, ammeter and sets for electricity consumption
Standby, the input/output terminal of the battery pack is connect with the first input/output terminal of the converter, and the second of the converter
Input/output terminal is connect with the electricity supply and use equipment, and the ammeter is arranged between the electricity supply and use equipment and the converter,
For measuring the electric flux to circulate between the converter and the electricity supply and use equipment；
Obtain the battery pack initial residual charge value and rated energy watt-hour number；
Operating condition of the model in preset calculating cycle is obtained, and obtains the electric flux changing value of the ammeter；
The converter is obtained in conversion efficiency and the battery pack the filling under the operating condition under the operating condition
Discharging efficiency；
It is obtained according to the efficiency for charge-discharge of the electric flux changing value of the ammeter, the conversion efficiency of the converter and the battery pack
To the electric quantity change value of the battery pack；
It is new that the battery pack is obtained according to the battery pack initial residual charge value, rated energy watt-hour number and electric quantity change value
Residual electric quantity；Wherein, the new residual electric quantity is the initial residual charge value of next calculating cycle.
2. battery electric quantity as described in claim 1 exchanges measuring method, which is characterized in that at the beginning of the acquisition battery pack
Beginning residual electric quantity and rated energy watt-hour number, specifically include:
The battery pack initial residual electricity is obtained by the factory calibration of the battery pack, manual calibration or current integration method
Value；
The rated energy watt-hour number of the battery pack is obtained by the factory calibration of the battery pack.
3. battery electric quantity as described in claim 1 exchanges measuring method, which is characterized in that the acquisition converter exists
The efficiency for charge-discharge of conversion efficiency and the battery pack under the operating condition under the operating condition, specifically includes:
According to the curve that the conversion efficiency of the converter changes under different operating conditions, the converter is obtained in the operation work
Conversion efficiency under condition；
According to the curve that the efficiency for charge-discharge of the battery pack changes under different operating conditions, the battery pack is obtained in the operation
Efficiency for charge-discharge under operating condition.
4. battery electric quantity as described in claim 1 exchanges measuring method, which is characterized in that described to obtain the model pre-
If calculating cycle in operating condition, and obtain the electric flux changing value of the ammeter, specifically include:
Operating condition of the model in preset calculating cycle is obtained, and obtains the positive electric flux variation of the ammeter
The electric flux changing value of value and negative sense；Wherein, it is described when positive electric flux changing value is that the battery pack is in internally charging
The electric flux changing value that ammeter forward direction measures；When the electric flux changing value of negative sense is that the battery pack is in externally electric discharge, institute
State the electric flux changing value that ammeter negative sense measures.
5. battery electric quantity as claimed in claim 4 exchanges measuring method, which is characterized in that the electricity according to the ammeter
The electricity that the efficiency for charge-discharge of energy change value, the conversion efficiency of the converter and the battery pack obtains the battery pack becomes
Change value, specifically includes:
According to the electric flux changing value of the ammeter forward direction multiplied by the conversion efficiency of the converter and the charge and discharge of the battery pack
The product of electrical efficiency obtains the electric quantity change value of the battery pack forward direction；
According to the charge and discharge of the electric flux changing value of the ammeter negative sense and the conversion efficiency and the battery pack of the converter
The ratio of efficiency product obtains the electric quantity change value of the battery pack negative sense.
6. battery electric quantity as claimed in claim 5 exchanges measuring method, which is characterized in that described according at the beginning of the battery pack
Beginning residual electric quantity, rated energy watt-hour number and electric quantity change value obtain the new residual electric quantity of the battery pack, specific to wrap
It includes:
Residual electric quantity is obtained according to the ratio of the electric quantity change value of the battery pack forward direction and the rated energy watt-hour number
Incrementss；
Residual electric quantity is obtained according to the ratio of the electric quantity change value of the battery pack negative sense and the rated energy watt-hour number
Reduction amount；
The reduction amount of the incrementss, the residual electric quantity that are worth according to the residual electric quantity and the initial residual charge value obtain
The new residual electric quantity of the battery pack.
7. a kind of battery electric quantity exchange measuring and calculating device characterized by comprising
Model obtains module, for obtaining the appraising model of battery electric quantity state, wherein the model includes battery pack, transformation
Device, ammeter and electricity supply and use equipment, the input/output terminal of the battery pack are connect with the first input/output terminal of the converter,
Second input/output terminal of the converter is connect with the electricity supply and use equipment, and the ammeter is arranged in the electricity supply and use equipment
Between the converter, for measuring the electric flux to circulate between the converter and the electricity supply and use equipment；
Parameter acquisition module, for obtaining the battery pack initial residual charge value and rated energy watt-hour number；
Module is run, for obtaining operating condition of the model in preset calculating cycle, and obtains the electricity of the ammeter
Energy change value；
Efficiency obtains module, for obtaining conversion efficiency and the battery pack of the converter under the operating condition in institute
State the efficiency for charge-discharge under operating condition；
Electricity computing module, for according to the electric flux changing value of the ammeter, the conversion efficiency of the converter and the electricity
The efficiency for charge-discharge of pond group obtains the electric quantity change value of the battery pack；
As a result module is obtained, for according to the battery pack initial residual charge value, rated energy watt-hour number and electric quantity change value
Obtain the new residual electric quantity of the battery pack；Wherein, the new residual electric quantity is the initial surplus of next calculating cycle
Remaining charge value.
8. a kind of device using battery electric quantity exchange measuring method, which is characterized in that including processor, memory and deposit
The computer program executed by the processor is stored up in the memory and is configured as, the processor executes the calculating
Battery electric quantity exchange measuring method as claimed in any of claims 1 to 7 in one of claims is realized when machine program.
9. a kind of computer readable storage medium, which is characterized in that the computer readable storage medium includes the calculating of storage
Machine program, wherein equipment where controlling the computer readable storage medium in computer program operation is executed as weighed
Benefit require any one of 1 to 7 described in battery electric quantity exchange measuring method.
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