CN104808151B - The remaining capacity estimating device of electrical storage device - Google Patents
The remaining capacity estimating device of electrical storage device Download PDFInfo
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- CN104808151B CN104808151B CN201510034126.5A CN201510034126A CN104808151B CN 104808151 B CN104808151 B CN 104808151B CN 201510034126 A CN201510034126 A CN 201510034126A CN 104808151 B CN104808151 B CN 104808151B
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- mentioned
- remaining capacity
- battery
- calculated
- voltage
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Classifications
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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
-
- 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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
The remaining capacity estimating device of electrical storage device including multiple batteries, can by suppress each battery remaining capacity deviation come prevent the remaining capacity of electrical storage device calculate precision deteriorate.In the case where the coefficient correlation of each battery (3A, 3B ...) calculated by coefficient correlation calculated unit (10) meets rated condition, the weighting of the 1st remaining capacity and the 2nd remaining capacity calculated by the 2nd remaining capacity calculated unit (9) that calculated by all multiple batteries (3A, 3B ...) by the 1st remaining capacity calculated unit (6) synthesizes scavenging valve (11).
Description
Technical field
The present invention relates to the remaining capacity estimating device of electrical storage device, more particularly to including multiple batteries (secondary cell)
Electrical storage device the remaining capacity estimating device of electrical storage device that is estimated of remaining capacity.
Background technology
In the past, include the electrical storage device of multiple batteries (secondary cell) for carrying and supplied using from the electrical storage device
Electric power traveling the electric vehicle such as motor vehicle driven by mixed power, in order to grasp whether the remaining capacity of electrical storage device is the appearance that can travel
The remaining capacity measured and need precision to estimate electrical storage device well.
As the remaining capacity estimating device of this electrical storage device, such as there is following prior art literature.
Prior art literature
Patent document
Patent document 1：Unexamined Patent 11-174135 publications
Patent document 2：JP 2006-17544 publications
Battery remaining solid measure device involved by patent document 1 is to the magnitude of voltage of each battery of multiple batteries and from more
The current value of the both ends flow direction load of individual battery carries out the collection of stipulated number, according to the magnitude of voltage and electric current being collected into based on this
Minimum remaining capacity in the remaining capacity that value calculates determines the remaining capacity of electrical storage device.
The remaining capacity arithmetic unit of charge storage element (electrical storage device) involved by patent document 2 will be based on open-circuit voltage and calculate
The 2nd remaining capacity that the 1st remaining capacity gone out and the aggregate-value based on charging and discharging currents calculate is weighted synthesis and calculates the 3rd
Remaining capacity, computing is carried out to the remaining capacity of electrical storage device.
The content of the invention
Problems to be solved by the invention
But in above-mentioned patent document 1, the minimum value in the remaining capacity based on each battery calculates the residual of electrical storage device
Capacity is deposited, thus it is smaller than actual remaining capacity in the presence of the value calculated, and battery can turn into overcharge condition.In addition, in above-mentioned patent
In document 2, do not accounted for according to each battery of the electrical storage device including multiple batteries.
Thus, in the past in the electrical storage device including multiple batteries, the remaining that is calculated by each battery based on open-circuit voltage
Capacity causes the deviation for estimating precision because the temperature of each battery is different, so the presumption precision of the remaining capacity of electrical storage device
It is possible to deteriorate, it is desirable to improved.
Therefore, it is an object of the invention in the electrical storage device including multiple batteries, there is provided can be by suppressing each battery
Remaining capacity deviation and prevent the remaining capacity of electrical storage device for calculating precision deterioration of the remaining capacity of electrical storage device from pushing away
Determine device.
The solution used to solve the problem
The present invention is the remaining capacity estimating device of electrical storage device, and above-mentioned electrical storage device includes multiple batteries, above-mentioned electric power storage
The remaining capacity estimating device of device is characterised by possessing：Current detecting unit, it detects each battery of above-mentioned multiple batteries
Current value；1st remaining capacity calculated unit, it adds up the above-mentioned current value that above-mentioned current detecting unit detects and calculated
1st remaining capacity；Voltage detection unit, it detects the magnitude of voltage of each battery of above-mentioned multiple batteries；Voltage x current memory cell,
What it was detected by the above-mentioned magnitude of voltage detected by above-mentioned voltage detection unit of each battery and by above-mentioned current detecting unit
Above-mentioned current value is stored as one group of data, and the data of store predetermined sets of numbers；Near linear setup unit, its root
According to the above-mentioned magnitude of voltage and above-mentioned current value setting near linear of the storage of above-mentioned voltage x current memory cell；2nd remaining capacity is calculated
Go out unit, its above-mentioned near linear presumption open battery voltage value set according to above-mentioned near linear setup unit, and according to
The open battery voltage value calculates the 2nd remaining capacity of each battery；And coefficient correlation calculated unit, it calculates above-mentioned multiple electricity
The coefficient correlation of each battery in pond, and above-mentioned remaining capacity estimating device is also equipped with scavenging valve, and above-mentioned scavenging valve is upper
State above-mentioned each battery that coefficient correlation calculated unit calculates coefficient correlation meet rated condition in the case of, by by above-mentioned
Above-mentioned 1st remaining capacity that 1 remaining capacity calculated unit calculates and calculated by above-mentioned 2nd remaining capacity calculated unit above-mentioned
2 remaining capacities are calculated all weight coefficients of above-mentioned multiple batteries and the remaining appearance of the battery are released using the weight coefficient calculated
Amount.
Invention effect
The present invention can be prevented in the electrical storage device including multiple batteries by the deviation for the remaining capacity for suppressing each battery
Only the precision that calculates of the remaining capacity of electrical storage device deteriorates.
Brief description of the drawings
Fig. 1 is the system pie graph of the remaining capacity estimating device of electrical storage device.(embodiment)
Fig. 2 is the flow chart of remaining capacity presumption control.(embodiment)
Fig. 3 is the flow chart for calculating each 2nd remaining capacity.(embodiment)
Description of reference numerals
1 electrical storage device
2 remaining capacity estimating devices
3A, 3B ... battery (secondary cell；Element cell)
4 current detecting units
5 voltage detection units
6 the 1st remaining capacity calculated unit
7 voltage x current memory cell (memory)
8 near linear setup units
9 the 2nd remaining capacity calculated unit
10 coefficient correlation calculated unit
11 scavenging valves
12 battery temperature detection units
Embodiment
The present invention is prevented in the electrical storage device including multiple batteries by suppressing the deviation of remaining capacity of each battery
The purpose for calculating precision deterioration of the remaining capacity of electrical storage device is added by carrying out the 1st remaining capacity and the 2nd remaining capacity
Power synthesizes to realize.
Embodiment
Fig. 1~Fig. 3 represents embodiments of the invention.
As shown in figure 1, electrical storage device 1 and the electrical storage device are equipped with the electric vehicle including motor vehicle driven by mixed power etc.
1 remaining capacity estimating device 2.
Electrical storage device 1 includes multiple battery (secondary cells；Element cell) 3A, 3B ....
It is provided with electrical storage device 1：Current detecting unit 4, its detection are flowed in multiple battery 3A, 3B ... each battery
Current value；And voltage detection unit 5, it detects the magnitude of voltage of multiple battery 3A, 3B ... each battery.
Remaining capacity estimating device 2 possesses：1st remaining capacity calculated unit 6, voltage x current memory cell (memory) 7,
Near linear setup unit 8, the 2nd remaining capacity calculated unit 9, coefficient correlation calculated unit 10 and scavenging valve 11.1st is residual
Deposit capacity calculated unit 6 and voltage x current memory cell 7 is connected to current detecting unit 4.In addition, voltage x current memory cell 7
It is connected to voltage detection unit 5.
The accumulative current value detected by current detecting unit 4 of 1st remaining capacity calculated unit 6 holds to calculate the 1st remaining
Amount.
The magnitude of voltage detected by voltage detection unit 5 of the store predetermined quantity of voltage x current memory cell 7 and by electric current
The group for the current value that detection unit 4 detects.
Near linear setup unit 8 is approximate based on the magnitude of voltage stored by voltage x current memory cell 7 and current value setting
Near linear.
2nd remaining capacity calculated unit 9 is estimated based on basis by the near linear that near linear setup unit 8 is set
Open battery voltage value calculates the 2nd remaining capacity of each battery.
The coefficient correlation that coefficient correlation calculated unit 10 calculates each battery of multiple batteries (represents current value and magnitude of voltage
The index of relation, it is usually -1~1 value).Each electricity that the coefficient correlation is kept according to for example calculating after the 2nd remaining capacity
The current value in pond and the relation of magnitude of voltage calculate.Specifically, according to the electricity of fixed intervals and each battery of fixed qty acquirement
The relation of flow valuve and magnitude of voltage, multiplies method with minimum respectively by each battery and obtains an approximate curve and (calculate curve
Slope and intercept：Voltage during voltage=internal resistance × electric current+do not carry out discharge and recharge), now, calculate the phase relation of each battery
Number.
Scavenging valve 11 meets rated condition in the coefficient correlation of each battery calculated by coefficient correlation calculated unit 10
In the case of, carry out the 1st remaining capacity that is calculated by all multiple batteries by the 1st remaining capacity calculated unit 6 and held by the 2nd remaining
The weighting synthesis for the 2nd remaining capacity that amount calculated unit 9 calculates.That is, coefficient correlation is used as the weighting conditions of each battery.Separately
Outside, in this embodiment, it is substantially residual with set ratio progress and the 2nd to the 1st remaining capacity calculated according to current value
Deposit the relevant weighting of capacity.
In scavenging valve 11, above-mentioned rated condition multiple batteries whole coefficient correlations to be more than 1st setting and
The difference of the maxima and minima of the coefficient correlation of each battery calculated by coefficient correlation calculated unit 10 is below the 2nd setting
In the case of set up.
In addition, the ratio of temperature setting weighting synthesis of the scavenging valve 11 based on multiple each batteries.Therefore, scavenging valve 11
It is connected to detect the battery temperature detection unit 12 of the temperature of each battery.
Then, the remaining capacity presumption of the electrical storage device 1 involved by the embodiment is illustrated along Fig. 2 flow chart.
As shown in Fig. 2 when the program of remaining capacity estimating device 2 starts (step A01), first, in the 1st remaining capacity
In calculated unit 6, the accumulative current value detected by current detecting unit 4 calculates the 1st remaining capacity (step of each battery
A02)。
Then, in the 2nd remaining capacity calculated unit 9, the 2nd remaining capacity (step A03) of each battery is calculated.Along rear
The Fig. 3 stated flow chart explains calculating for the 2nd remaining capacity of each battery.
Afterwards, in coefficient correlation calculated unit 10, the maximum of the coefficient correlation of each battery of above-mentioned multiple batteries is calculated
Value and minimum value (step A04).
Then, in scavenging valve 11, whether the coefficient correlation for judging all batteries is more than 1st setting (step
A05)。
In the case where step A05 is "Yes", the maxima and minima of coefficient correlation is judged in scavenging valve 11
Difference whether be below the 2nd setting (step A06).
In the case where step A06 is "Yes", the weighting synthesis (step of all batteries is carried out in scavenging valve 11
A07)。
On the other hand, in the case where above-mentioned steps A05 is "No", or in the case where above-mentioned steps A06 is "No",
In scavenging valve 11, the remaining capacity of each battery is set to the 1st remaining capacity (step A08).
After above-mentioned steps A07 processing, or after above-mentioned steps A08 processing, calculate (presumption) electrical storage device 1
Final remaining capacity (SOC) (step A09).
Afterwards, by the EP (end of program) (step A10).
Illustrate each battery in Fig. 2 above-mentioned steps A03 the 2nd remaining capacity calculated unit 9 along Fig. 3 flow chart
2nd remaining capacity calculates.
As shown in figure 3, when when the calculating program startup (step B01) of the 2nd remaining capacity of each battery, first, by electric current
Detection unit 4 detects current value (step B02), and detects magnitude of voltage (step B03) by voltage detection unit 5, and then should
The current value and magnitude of voltage detected is stored in voltage x current memory cell 7 (step B04).
Then, the group of the current value and magnitude of voltage stored by voltage x current memory cell 7 is judged in scavenging valve 11
Whether quantity is more than specified quantity (step B05).
In the case where step B05 is "No", above-mentioned steps B02 is returned.
On the other hand, in the case where step B05 is "Yes", near linear setup unit 8, near linear is set
(step B06), in coefficient correlation calculated unit 10, the coefficient correlation for calculating each battery (represents the pass of current value and magnitude of voltage
The index of system) (step B07), then calculate the 2nd remaining capacity (step B08) of each battery.
Afterwards, the program is returned into (step B09).
As a result, in this embodiment, scavenging valve 11 is in each battery calculated by coefficient correlation calculated unit 10
In the case that the coefficient correlation of (3A, 3B ...) meets rated condition, carry out by all multiple batteries (3A, 3B ...) by the 1st remaining
The weighting of the 1st remaining capacity and the 2nd remaining capacity calculated by the 2nd remaining capacity calculated unit 9 that capacity calculated unit 6 calculates
Synthesis.
Thus, in the electrical storage device 1 including multiple batteries, the presumption essence of the remaining capacity (SOC) of each battery can be suppressed
The deviation of degree, precision estimate the remaining capacity (SOC) of electrical storage device 1 well.Each battery (3A, 3B ...) mistake can thus be prevented
Charging and overdischarge, in addition, if be electric vehicle (EV vehicles), then the scope increase of workable remaining capacity (SOC) and
Can endurance distance extend, in addition, if be motor vehicle driven by mixed power (HEV vehicles), then can ensure that it is appropriate can charge-discharge electric power, energy
It is favorably improved fuel efficiency.
In addition, in scavenging valve 11, above-mentioned rated condition multiple batteries whole coefficient correlations for the 1st setting with
The difference of the maxima and minima of the coefficient correlation of upper and each battery is sets up in the case of below the 2nd setting.
Thus, the reduction of the presumption precision of the remaining capacity as caused by the deviation of the coefficient correlation of each battery can be prevented.
Moreover, the ratio of temperature setting weighting synthesis of the scavenging valve 11 based on multiple each batteries.
Thus, can prevent the presumption precision of the remaining capacity of each battery as caused by the temperature of each battery reduces.Usually,
In the case where the temperature of each battery is low, internal resistance value uprises, and in discharge and recharge, the amplitude for having the voltage of each battery becomes big
The tendency that (being easy to obtain near linear), coefficient correlation uprise.But in the case where the temperature of each battery is low, due to so-called
The phenomenon of polarization, the tendency of the output voltage different from the voltage of original each battery also be present, therefore can not be judged as completely
Because coefficient correlation height is so the precision for the remaining capacity (SOC) being deduced is also high.Therefore, it is extremely low in the temperature of each battery
In the case of, exceptionally, the ratio synthesized by reducing the weighting relevant with the 2nd remaining capacity of the battery, energy precision is well
Estimate the remaining capacity (SOC) of each battery.
Industrial utilizability
Remaining capacity estimating device involved in the present invention is not limited to motor vehicle driven by mixed power, moreover it is possible to applied to electric automobile etc.
Other electric vehicles.
Claims (2)
1. a kind of remaining capacity estimating device of electrical storage device, above-mentioned electrical storage device includes multiple batteries, above-mentioned electrical storage device
Remaining capacity estimating device is characterised by possessing：Current detecting unit, it detects the electric current of each battery of above-mentioned multiple batteries
Value；1st remaining capacity calculated unit, it adds up the above-mentioned current value that detects of above-mentioned current detecting unit and to calculate the 1st residual
Deposit capacity；Voltage detection unit, it detects the magnitude of voltage of each battery of above-mentioned multiple batteries；Voltage x current memory cell, it will
The above-mentioned magnitude of voltage detected by above-mentioned voltage detection unit of each battery and detected by above-mentioned current detecting unit above-mentioned
Current value is stored as one group of data, and the data of store predetermined sets of numbers；Near linear setup unit, it is according to upper
State the above-mentioned magnitude of voltage and above-mentioned current value setting near linear of voltage x current memory cell storage；2nd remaining capacity calculates list
Member, its above-mentioned near linear set according to above-mentioned near linear setup unit estimates open battery voltage value, and is opened according to this
Road battery voltage value calculates the 2nd remaining capacity of each battery；And coefficient correlation calculated unit, it calculates above-mentioned multiple batteries
The coefficient correlation of each battery, and above-mentioned remaining capacity estimating device is also equipped with scavenging valve, and above-mentioned scavenging valve is in above-mentioned phase
In the case that the coefficient correlation for above-mentioned each battery that relation number calculated unit calculates meets rated condition, by residual by the above-mentioned 1st
The above-mentioned 2nd for depositing capacity calculated unit above-mentioned 1st remaining capacity calculated and being calculated by above-mentioned 2nd remaining capacity calculated unit is residual
The calculation of capacity all weight coefficient of above-mentioned multiple batteries and the remaining capacity for using the weight coefficient calculated to release the battery are deposited,
Above-mentioned rated condition is that the coefficient correlation of all above-mentioned multiple batteries is more than 1st setting and above-mentioned phase relation is figured
Go out the difference of the maxima and minima of the coefficient correlation for above-mentioned each battery that unit calculates for below the 2nd setting.
2. the remaining capacity estimating device of electrical storage device according to claim 1, it is characterised in that
Above-mentioned scavenging valve sets the ratio of weight coefficient according to the temperature of each battery of above-mentioned multiple batteries.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014010034A JP2015137952A (en) | 2014-01-23 | 2014-01-23 | Residual capacity estimation device for power storage device |
| JP2014-010034 | 2014-01-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104808151A CN104808151A (en) | 2015-07-29 |
| CN104808151B true CN104808151B (en) | 2017-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510034126.5A Expired - Fee Related CN104808151B (en) | 2014-01-23 | 2015-01-23 | The remaining capacity estimating device of electrical storage device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2015137952A (en) |
| CN (1) | CN104808151B (en) |
| DE (1) | DE102015000721A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112017001422B4 (en) * | 2016-05-12 | 2019-03-21 | Hitachi Automotive Systems, Ltd. | Battery state estimator |
| JP6614176B2 (en) * | 2017-02-09 | 2019-12-04 | トヨタ自動車株式会社 | Battery state estimation device |
| US11262408B2 (en) | 2020-02-24 | 2022-03-01 | Ford Global Technologies, Llc | Vehicle traction battery over-discharge diagnosing method and assembly |
| DE102021209613B3 (en) | 2021-09-01 | 2023-02-02 | Siemens Mobility GmbH | Arrangement with battery system and method for its operation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5793211A (en) * | 1996-06-27 | 1998-08-11 | Yazaki Corporation | Battery remaining capacity measuring system for electric motor vehicles |
| CN1610986A (en) * | 2001-12-27 | 2005-04-27 | 松下电动车辆能源股份有限公司 | Method and device for estimating remaining capacity of secondary cell, battery pack system, and electric vehicle |
| CN1760691A (en) * | 2004-10-12 | 2006-04-19 | 三洋电机株式会社 | Method of detecting state-of-charge of battery and power device |
| CN101813754A (en) * | 2010-04-19 | 2010-08-25 | 清华大学 | State estimating method for automobile start illumination type lead-acid storage battery |
| CN102119338A (en) * | 2008-08-08 | 2011-07-06 | 株式会社Lg化学 | Apparatus and method for estimating state of health of battery based on battery voltage variation pattern |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11174135A (en) | 1997-12-09 | 1999-07-02 | Yazaki Corp | Device for measuring remaining capacity of battery |
| JP2000227465A (en) * | 1999-02-05 | 2000-08-15 | Yazaki Corp | Battery residual capacity measuring method and device therefor |
| JP4509670B2 (en) | 2004-06-30 | 2010-07-21 | 富士重工業株式会社 | Remaining capacity calculation device for power storage device |
| JP4830382B2 (en) * | 2005-07-19 | 2011-12-07 | 日産自動車株式会社 | Secondary battery charge rate estimation device |
| CN103635822B (en) * | 2011-08-30 | 2016-02-10 | 三洋电机株式会社 | Battery system, electric vehicle, moving body, power storage devices and supply unit |
-
2014
- 2014-01-23 JP JP2014010034A patent/JP2015137952A/en active Pending
-
2015
- 2015-01-21 DE DE102015000721.1A patent/DE102015000721A1/en active Pending
- 2015-01-23 CN CN201510034126.5A patent/CN104808151B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5793211A (en) * | 1996-06-27 | 1998-08-11 | Yazaki Corporation | Battery remaining capacity measuring system for electric motor vehicles |
| CN1610986A (en) * | 2001-12-27 | 2005-04-27 | 松下电动车辆能源股份有限公司 | Method and device for estimating remaining capacity of secondary cell, battery pack system, and electric vehicle |
| CN1760691A (en) * | 2004-10-12 | 2006-04-19 | 三洋电机株式会社 | Method of detecting state-of-charge of battery and power device |
| CN102119338A (en) * | 2008-08-08 | 2011-07-06 | 株式会社Lg化学 | Apparatus and method for estimating state of health of battery based on battery voltage variation pattern |
| CN101813754A (en) * | 2010-04-19 | 2010-08-25 | 清华大学 | State estimating method for automobile start illumination type lead-acid storage battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015137952A (en) | 2015-07-30 |
| CN104808151A (en) | 2015-07-29 |
| DE102015000721A1 (en) | 2015-07-23 |
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