WO2004088342A1 - バッテリ状態監視装置及びその方法 - Google Patents
バッテリ状態監視装置及びその方法 Download PDFInfo
- Publication number
- WO2004088342A1 WO2004088342A1 PCT/JP2004/003925 JP2004003925W WO2004088342A1 WO 2004088342 A1 WO2004088342 A1 WO 2004088342A1 JP 2004003925 W JP2004003925 W JP 2004003925W WO 2004088342 A1 WO2004088342 A1 WO 2004088342A1
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- WO
- WIPO (PCT)
- Prior art keywords
- battery
- current
- state
- deterioration
- degree
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
-
- 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
-
- 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]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
Definitions
- Patent application title Battery condition monitoring device and method
- the present invention relates to a battery deterioration monitoring apparatus and method, and more particularly to a battery deterioration monitoring apparatus and method for monitoring the deterioration of a battery.
- the pure resistance (ohmic resistance) of the battery which is a component of the internal resistance that does not change with the discharge current or the discharge time, is detected, and based on the detected pure resistance, the degree of deterioration, which is an index of deterioration, is determined. I was asking.
- the factors that increase the internal resistance of the battery include degradation of reversibility, which occurs temporarily due to temperature changes, and lattice corrosion, sulfation, and fallout of active material during repeated charging and discharging.
- degradation of reversibility which occurs temporarily due to temperature changes, and lattice corrosion, sulfation, and fallout of active material during repeated charging and discharging.
- An object of the present invention is to provide a battery condition monitoring device and a method thereof that can be grasped. Disclosure of the invention
- the invention according to claim 1 is a battery state monitoring device for monitoring a state of a battery, wherein the first deterioration degree detecting means detects a first deterioration degree due to an increase in an internal resistance of the battery; A second deterioration degree detecting means for detecting a second deterioration degree due to a decrease in the active material of the battery, which is a cause of a decrease in the charge capacity of the battery, wherein both the first deterioration degree and the second deterioration degree are included. And monitoring the state of the battery.
- the invention according to claim 2 is the battery state monitoring device according to claim 1, wherein the first deterioration degree detection unit detects a discharge current and a terminal voltage of the battery detected when high-rate discharge is performed. Based on the pure resistance of the battery, a discharge current and a terminal voltage of the battery detected when discharging is performed, and a terminal voltage of an internal resistance component other than the pure resistance based on the pure resistance of the battery. A saturation polarization, which is a saturation value of the drop, is obtained, and the first degree of degradation is detected based on the obtained pure resistance and the saturation polarization.
- the invention according to claim 3 is the battery state monitoring device according to claim 1 or 2, wherein the second deterioration degree detection means reduces a full charge capacity of the battery at an arbitrary time point with respect to a full charge capacity of a new battery.
- the method is characterized in that the second degree of deterioration is detected based on the amount.
- the invention according to claim 4 is a battery state monitoring method for monitoring the state of a battery, comprising: a first degree of deterioration due to an increase in an internal resistance of the battery; and a reduction factor of a charge capacity of the battery.
- the state of the battery is monitored based on both the second degree of deterioration indicating the amount of decrease in the active material of the battery.
- FIG. 1 shows a battery state monitoring device that implements the battery state monitoring method of the present invention. It is a block diagram showing one embodiment.
- FIG. 2 is a graph showing an example of a discharge current accompanying an inrush current at the start of starter motor driving.
- FIG. 3 is a graph showing an example of an I-V characteristic represented by a second-order approximation formula.
- FIG. 4 is a graph for explaining an example of how to remove the concentration polarization component from the approximate expression in the increasing direction.
- FIG. 5 is a graph for explaining an example of how to remove the concentration polarization component from the approximate expression in the decreasing direction.
- FIG. 6 is a graph showing an example of the I-V characteristic in which the increasing direction is expressed by a first-order approximation formula.
- FIG. 2 is a graph showing an example of a discharge current accompanying an inrush current at the start of starter motor driving.
- FIG. 3 is a graph showing an example of an I-V characteristic represented by a second-order approx
- FIG. 7 is a graph for explaining another example of removing the concentration polarization component from the approximate expression in the decreasing direction.
- FIG. 8 is a graph for explaining another example of how to remove the concentration polarization component from the approximate expression in the decreasing direction.
- FIG. 9 is a graph for explaining the details of the voltage drop occurring inside the battery during discharge satisfying the saturation polarization detection condition.
- a first deterioration degree (hereinafter, referred to as S) due to an increase in internal resistance of the battery is described. How to calculate the battery's net resistance to calculate SOH 1) will be described.
- a 12-V car, a 42-V car, an EV car, and an HEV car include a starter motor, a motor generator, and a traction motor.
- a constant load that requires a large current is installed.
- a starter motor or similar high-current constant load is turned on, a constant current corresponding to the load is applied to the constant load after an inrush current flows in the initial stage of the drive start. It will flow.
- the load is a lamp, the one that corresponds to the inrush current is sometimes called the rush current.
- the inrush current flowing through the field coil changes from almost 0 to a steady state within a short time of, for example, 3 ms immediately after the start of constant load driving, as shown in Fig. 2.
- a peak value many times larger than the current, for example, 500 (A)
- a short time of, for example, 150 milliseconds from this peak value It flows in such a way that it monotonically decreases to a steady value according to the magnitude of the constant load, and is supplied as discharge current from the battery.
- V al I 2 + bl I + cl ## (1)
- V a2 I 2 + b2 I + c2 .
- the voltage difference (cl-c2) between the intercept of the approximate curve in the current increasing direction and the intercept of the approximate curve in the current decreasing direction is the voltage difference at 0 (A) when no current flows. It is considered that the voltage drop does not include the voltage drop due to the pure resistance and the activation polarization and is caused only by the concentration polarization component newly generated by the discharge. Therefore, this voltage difference (cl-c2) is caused only by the concentration polarization, and the concentration polarization at the current 0 (A) point is defined as V polcO. Also, it is considered that arbitrary concentration polarization is proportional to the value obtained by multiplying the magnitude of the inrush current by the time that the current flows, that is, Ah (because of the short time, hereafter expressed as Asec).
- Vpolcp is expressed by the following equation.
- Asec of entire discharge (Asec when current increases + Asec when current decreases)
- V I is expressed by the following equation.
- V 1 al I p 2 + bl I p + cl + Vpolcp
- I p is the current value at the peak value.
- V a3 I 2 + b3 I + c3 (4)
- V a3 I 2 + bl I + cl ...... (5)
- VpolcB [(Asec from start of current increase to point B) / (Asec of entire discharge)] X VpolcO ;
- V a4 I 2 + b4 I + c4 (8)
- Equation (8) The coefficients a4, b4, and c4 in Equation (8) are obtained by substituting the current values and voltage values at the two points A and B and the peak point into Equation (8), and establishing a three-point simultaneous equation. It can be determined by solving.
- the differential value R1 of the current addition and the differential value R2 of the current decrease at the peak value are obtained by the following equation.
- the difference between the differential values R 1 and R 2 obtained by the above equation is based on the fact that one is a peak value in the increasing direction of activation polarization and the other is a peak value in the decreasing direction. Then, as a simulated discharge corresponding to the inrush current, an electronic load is used to increase the discharge from 0 to 200 A in 0.25 seconds and decrease from the peak value to 0 in the same time.
- the rate of change of the two near the peak value is equal, and it can be understood that the current-voltage characteristic of the pure resistance exists between the two.
- the pure resistance R is calculated by the following equation. Can be
- the current increase direction ends in a short time of 3 milliseconds (msec), and the current increase peak value is a fast current change in which almost no concentration polarization occurs, but the current decrease direction is smaller than the current increase direction. Since the current flows for a long time of 150 msec, a large concentration polarization occurs even though it is decreasing. However, since a phenomenon different from the period during which the inrush current flows occurs during the clamping period,
- the battery discharge current and terminal voltage during this period should not be used as data for determining current-voltage characteristics in the current decreasing direction.
- the current increase direction can be approximated by a straight line connecting the current increase start point and the peak value, as shown in Fig. 6, and the peak value 50
- the occurrence of concentration polarization at 0 (A) can be approximated to 0 (A).
- the slope of the approximate straight line in the current increasing direction is used as the differential value of the peak value.
- the two terminal voltage changes per unit current change at the points corresponding to the peak values of the first and second approximate expressions excluding the voltage drop due to concentration polarization are calculated.
- the value, that is, the slope may be multiplied by the ratio of the time of the monotonically increasing period and the period of the monotonically decreasing period to the total time during which the inrush current flows, and then added.
- the total time is the time required for monotonically increasing and decreasing
- the proportional distribution rate is multiplied by each slope and added.
- the activation polarization has a magnitude corresponding to the current value in principle, but it depends on the amount of concentration polarization at that time and does not occur in principle. If the concentration polarization is small, the activation polarization also occurs. Smaller, bigger larger.
- the intermediate value between the two terminal voltage changes per unit current change at the point corresponding to the peak values of the two approximations excluding the voltage drop due to the concentration polarization component is the pure resistance of the battery. It can be measured as a value.
- a point corresponding to a current value of about 1/2 of the peak current is defined as a point from which the concentration polarization has been removed
- a straight line connecting this point and the two points of the peak value is obtained as shown in Fig. 8.
- First-order approximation may be used.
- the slope of the approximate straight line in the current decreasing direction is used as the differential value of the peak value, but an accurate pure resistance that is the same as that using the quadratic curve is used. Desired.
- the intermediate value of the two terminal voltage changes per unit current change at the point corresponding to the peak values of the two approximate expressions excluding the voltage drop due to the concentration polarization component is measured as the value of the pure resistance of the battery. be able to.
- the in-vehicle battery pure resistance measurement method is used as a constant load, and an inrush current accompanied by the occurrence of concentration polarization flows in both increasing and decreasing discharge currents.
- a starter motor is used will be specifically described.
- a discharge current flows from the battery that monotonically increases beyond the steady state value and monotonically decreases from the peak value to the steady state value.
- the battery discharge current and the terminal voltage are periodically measured, for example, by sampling at a period of 100 microseconds ( ⁇ sec), and a large number of pairs of the battery discharge current and the terminal voltage are obtained. can get.
- the latest set of the discharge current and the terminal voltage of the battery obtained in this way is stored for a predetermined period of time, for example, in a memory as rewritable storage means such as a RAM, and is collected.
- Current-voltage characteristics for increasing and decreasing discharge currents that show the correlation between terminal voltage and discharge current by the least squares method using a set of discharge current and terminal voltage stored and collected in memory
- two curve approximation equations as shown in equations (1) and (2) are obtained.
- the voltage drop due to the concentration polarization component is deleted from these two approximate expressions, and a corrected curve approximation expression that does not include the concentration polarization component is obtained.
- the voltage difference at the time of 0 (A) where no current flows in the approximation formulas (1) and (2) is calculated by the concentration polarization without the voltage drop due to the pure resistance and the activation polarization. Asking. Using this voltage difference, the voltage drop due to the concentration polarization component at the current peak value in the approximate expression (1) of the current-voltage characteristic for the increasing discharge current is determined. For this purpose, we take advantage of the fact that concentration polarization is changed by the current-time product of the current magnitude multiplied by the current flow time.
- an approximate expression not including the concentration polarization component is obtained from the approximate expression (2) for the current-voltage characteristic with respect to the decreasing discharge current.
- two points are obtained in which the concentration polarization component is deleted in addition to the peak value.
- the fact that the concentration polarization is changed by the current-time product of the current magnitude multiplied by the current flow time is used.
- the approximate equation (2) of the current-voltage characteristic for the decreasing discharge current is calculated using the coordinates of the three points of the two points and the peak value. Find the modified curve approximation equation (8).
- the modified resistance approximation equation for the pure resistance and the activation polarization current increase direction with the concentration polarization component removed by the above equation (5), and the pure resistance and activity with the concentration polarization component removed by the equation (8) Since the correction curve approximation formula for the direction of decrease in the activation polarization current is based on the difference in the activation polarization component, the pure resistance is obtained excluding the activation polarization component. For this reason, focusing on the peak values of both approximations, the difference between the differential value of the current increase and the differential value of the current decrease at the peak value is that one is in the direction of increasing activation polarization and the other is in the other direction.
- the pure resistance R n can be calculated.
- R n Rpolkl X 1 0 0/1 0 3 + Rpolk2 x 3/1 0 3
- the open circuit voltage of the vehicle battery in the battery equilibrium state is, for example, every time sufficient time has passed for the fixed charge / discharge polarization to elapse after the vehicle's ignition switch is turned off. Measure the terminal voltage with the load operated by the power supply from the battery excluding loads such as computers that require dark current supply, and measure the terminal voltage, and use this as the open circuit voltage in the latest balanced state. Can be detected.
- the amount of energy that the battery can actually release to the load is calculated from the charge capacity (current-time product) corresponding to the terminal voltage of the battery to the amount corresponding to the voltage drop generated inside the battery during discharging, that is, The battery cannot be discharged due to the internal resistance of the battery. Is the remaining capacity after subtracting the new capacity.
- the voltage drop generated inside the battery during discharge satisfying the saturation polarization detection condition is the voltage drop due to the component of the battery's pure resistance (shown as IR drop in the figure) and the pure resistance.
- the voltage drop due to the internal resistance component other than the component can be considered separately.
- the pure resistance is obtained by the above-described method, and the discharge current due to the component of the pure resistance is calculated.
- a maximum value that is, a saturation value.
- V a I 2 + b I + c... (12)
- the terminal voltage V of the battery is expressed as shown below by the sum of the voltage drop due to the component of the pure resistance Rn of the battery and the voltage drop V R due to the internal resistance component other than the component of the pure resistance.
- V c— R n XI -V R ... (13)
- SOH 1 is calculated by calculating the ratio of the dischargeable capacity (ADC) to the charge capacity (hereinafter referred to as SOC), which is the amount of electricity stored in the battery, minus the capacity that cannot be discharged due to internal resistance from the charge capacity. .
- ADC dischargeable capacity
- SOC charge capacity
- the voltage value V ADC corresponding to the above-mentioned dischargeable capacity ADC can be obtained as follows.
- V ADC OCVn-Rn XI p-V R pol
- OCVn is the open circuit voltage of the battery, and Ip is the peak current value of this discharge.
- the dischargeable capacity ADC can be obtained by the following voltage system conversion formula.
- ADC ⁇ (V ADC -V e) / (OCV f — OCV e) ⁇ X 100%
- V e OCV f-I XR ref
- OCV f is the open circuit voltage when the battery is fully charged when it is new
- OCV e is the open circuit voltage when the discharge of the battery is new when it is new
- S OC ⁇ (OCVn- OCV e ) / (OCV f -OCV e) ⁇ X 1 00% Therefore, the S OH 1 is substituted into the pure resistance R n and saturation polarization V R pol battery in the equation below Symbol Can be obtained.
- S OH 1 ⁇ (V ADC -V e) / (OCVn-OCV e) ⁇ X 100% — (16)
- SOH2 the second degree of degradation due to the decrease in the active material of the battery, which is the cause of the decrease in the charge capacity of the battery.
- S OH 2 is determined based on the amount of decrease in the full charge capacity of the battery at an arbitrary point in time with respect to the full charge capacity of a new battery.
- the open circuit voltage OCV f at full charge and the discharge end voltage OCV e expressed in V (volts), and the open circuit voltage at full charge
- the initial quantity of electricity, expressed as Ah (ampere-hour) that can be stored in the battery up to the discharge end voltage can be predetermined.
- the open circuit voltage OC V f at full charge corresponds to the full charge capacity of a new battery.
- the OCV d and the OCV f predetermined as described above are used to determine the new battery
- the amount of decrease in the full charge capacity of the battery at any point in time with respect to the full charge capacity can be determined.
- the charging efficiency decreases due to an increase in the gasification resistance component due to gassing (for example, decreases to a value close to zero).
- the relationship between the open circuit voltage and the amount of electricity stored in the battery is, for example, an electrolyte It changes compared to when it is new due to a decrease in Therefore, if OCV d is corrected based on the amount of change, more accurate full charge capacity and second degree of deterioration can be obtained.
- FIG. 1 is a block diagram showing an embodiment of a battery state monitoring device that implements the dischargeable capacity calculation method and the battery state monitoring method of the present invention.
- the battery state monitoring device according to the present embodiment which is indicated by reference numeral 1 in FIG. 1, is mounted on a hybrid vehicle having a motor generator 5 in addition to the engine 3.
- this hybrid vehicle transmits only the output of the engine 3 from the drive shaft 7 to the wheels 11 via the differential case 9 to run the vehicle.
- the motor 5 is configured to function as a motor, and the output of the motor generator 5 is transmitted from the drive shaft 7 to the wheels 11 in addition to the output of the engine 3 to perform the assist running.
- the motor generator 5 functions as a generator (generator) during deceleration or braking, converts kinetic energy into electric energy, and supplies a hybrid power supply to various loads. It is configured to charge the battery 13 mounted on the vehicle.
- the motor generator 5 is further used as a cell motor for forcibly rotating the flywheel of the engine 3 when the engine 3 is started when a starter switch (not shown) is turned on.
- the battery state monitoring device 1 includes a discharge current I of the battery 13 with respect to the motor generator 5 and the like functioning as an assist running motor and a cell motor, and a charge with respect to the battery 13 from the motor generator 5 as a generator. It has a current sensor 15 for detecting current and a voltage sensor 17 having an infinite resistance connected in parallel with the battery 13 and detecting the terminal voltage V of the battery 13.
- the above-described current sensor 15 and voltage sensor 17 are ignition switches. It is placed on a circuit that enters a closed circuit state when it is turned on.
- the output of the current sensor 15 and the voltage sensor 17 described above is used in an interface circuit (hereinafter abbreviated as “IZF”) 21.
- IZF interface circuit
- microcomputer 23 that is loaded after AZD conversion
- NVM non-volatile memory
- the microcomputer 23 has a CPU 23a, a RAM 23b, and a ROM 23c, among which the CPU 23a has a RAM 23b and a ROM 23c.
- the IZF 21 is connected, and a signal indicating the on / off state of the above-mentioned not-shown identification switch is input.
- the RAM 23b has a data area for storing various data and a work area for various processing operations, and the ROM 23c has a control program for causing the CPU 23a to perform various processing operations. Is stored.
- the microcomputer 23 performs the various detections described above based on the outputs of the current sensor 15 and the voltage sensor 17, so that the SOH 1 and the SOH 2 of the battery 13 are detected. From this, it is understood that the microcomputer 23 functions as the first and second deterioration degree detecting means.
- the microcomputer 23 monitors the state of the battery 13 based on the calculated SOH1 and SOH2.
- the battery state monitoring device described above it is possible to ascertain the degradation combining the irreversibility and the reversibility degradation with SOH1, and to understand the irreversibility degradation with SOH2.
- the state of the battery can be accurately grasped.
- the first degree of deterioration due to the increase in the internal resistance of the battery and the second degree due to the decrease in the active material of the battery, which is a cause of reducing the charge capacity of the battery are provided. Detect the degree of deterioration. Then, the state of the battery is monitored based on both the detected first and second degrees of deterioration. As a result, Therefore, it is possible to grasp the degradation that combines the irreversibility and the reversibility degradation, and to grasp the irreversibility degradation from the second degradation degree. By monitoring the state of the battery based on the above, it is possible to obtain a battery state monitoring device and a method thereof that can accurately grasp the state of the battery.
- the first deterioration degree detecting means obtains the pure resistance of the battery based on the battery discharge current and the terminal voltage detected when the high-rate discharge is performed, and Saturation polarization, which is the saturation value of the terminal voltage drop due to the internal resistance component other than the pure resistance, was calculated based on the battery discharge current and the terminal voltage detected when the operation was performed, and the pure resistance of the battery.
- the second deterioration degree is detected based on the pure resistance and the saturation polarization.
- the pure resistance and the saturation polarization can be obtained only by detecting the discharge current and the terminal voltage of the battery when various discharges are performed, and processing the detection results.
- a battery state monitoring device can be obtained.
- the second deterioration degree detecting means detects the second deterioration degree based on a decrease amount of the full charge capacity of the battery at an arbitrary time point with respect to the full charge capacity of the new battery. As a result, it is possible to obtain a battery state monitoring device that can easily obtain the second deterioration degree by obtaining the reduction amount of the full charge capacity.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tests Of Electric Status Of Batteries (AREA)
- Secondary Cells (AREA)
Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04722648A EP1615043A4 (en) | 2003-03-31 | 2004-03-23 | METHOD AND APPARATUS FOR MONITORING THE CONDITION OF BATTERIES |
US10/551,385 US20060273763A1 (en) | 2003-03-31 | 2004-03-23 | Battery status monitoring apparatus and method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003-97463 | 2003-03-31 | ||
JP2003097463A JP2004301779A (ja) | 2003-03-31 | 2003-03-31 | バッテリ状態監視装置及びその方法 |
Publications (1)
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WO2004088342A1 true WO2004088342A1 (ja) | 2004-10-14 |
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PCT/JP2004/003925 WO2004088342A1 (ja) | 2003-03-31 | 2004-03-23 | バッテリ状態監視装置及びその方法 |
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Country | Link |
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US (1) | US20060273763A1 (ja) |
EP (1) | EP1615043A4 (ja) |
JP (1) | JP2004301779A (ja) |
WO (1) | WO2004088342A1 (ja) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2626716B1 (en) * | 2003-06-27 | 2015-09-16 | The Furukawa Electric Co., Ltd. | Device and method for judging deterioration of accumulator / secondary cell |
JP5368038B2 (ja) * | 2008-09-11 | 2013-12-18 | ミツミ電機株式会社 | 電池状態検知装置及びそれを内蔵する電池パック |
JP5348987B2 (ja) * | 2008-09-27 | 2013-11-20 | 三洋電機株式会社 | 電池の劣化度の検出方法 |
JP4821891B2 (ja) * | 2009-07-01 | 2011-11-24 | トヨタ自動車株式会社 | 電池制御システム及び車両 |
JP2014085118A (ja) * | 2012-10-19 | 2014-05-12 | Toyota Motor Corp | 蓄電システムおよび異常判別方法 |
JP2013253991A (ja) * | 2012-11-30 | 2013-12-19 | Gs Yuasa Corp | 蓄電素子の劣化後容量推定装置、劣化後容量推定方法及び蓄電システム |
US9431846B2 (en) * | 2012-12-12 | 2016-08-30 | General Electric Company | Systems and methods for controlling battery charging |
WO2019199057A1 (ko) | 2018-04-10 | 2019-10-17 | 주식회사 엘지화학 | 배터리 진단 장치 및 방법 |
JP7435101B2 (ja) * | 2020-03-18 | 2024-02-21 | 株式会社Gsユアサ | 推定装置、蓄電デバイス、推定方法、及びコンピュータプログラム |
CN111929598A (zh) * | 2020-09-16 | 2020-11-13 | 深圳奥特迅电力设备股份有限公司 | 一种蓄电池组内阻在线测量方法及装置 |
Citations (3)
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JPH08339834A (ja) * | 1995-06-13 | 1996-12-24 | Nippon Hoso Kyokai <Nhk> | 蓄電池の劣化度判定方法、及び劣化度判定装置 |
JP2002243814A (ja) * | 2000-11-07 | 2002-08-28 | Yazaki Corp | 車両用バッテリ純抵抗測定方法及び装置 |
JP2002247702A (ja) * | 2000-12-15 | 2002-08-30 | Yazaki Corp | 車載用バッテリの開回路電圧演算方法及びその装置、車載用バッテリの充電容量状態検出方法及びその装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5281919A (en) * | 1988-10-14 | 1994-01-25 | Alliedsignal Inc. | Automotive battery status monitor |
US6586940B2 (en) * | 2000-03-13 | 2003-07-01 | Nippon Telegraph And Telephone Corporation | Capacity estimation method, degradation estimation method and degradation estimation apparatus for lithium-ion cells, and lithium-ion batteries |
-
2003
- 2003-03-31 JP JP2003097463A patent/JP2004301779A/ja not_active Abandoned
-
2004
- 2004-03-23 US US10/551,385 patent/US20060273763A1/en not_active Abandoned
- 2004-03-23 EP EP04722648A patent/EP1615043A4/en not_active Withdrawn
- 2004-03-23 WO PCT/JP2004/003925 patent/WO2004088342A1/ja not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08339834A (ja) * | 1995-06-13 | 1996-12-24 | Nippon Hoso Kyokai <Nhk> | 蓄電池の劣化度判定方法、及び劣化度判定装置 |
JP2002243814A (ja) * | 2000-11-07 | 2002-08-28 | Yazaki Corp | 車両用バッテリ純抵抗測定方法及び装置 |
JP2002247702A (ja) * | 2000-12-15 | 2002-08-30 | Yazaki Corp | 車載用バッテリの開回路電圧演算方法及びその装置、車載用バッテリの充電容量状態検出方法及びその装置 |
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Publication number | Publication date |
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EP1615043A4 (en) | 2006-08-09 |
US20060273763A1 (en) | 2006-12-07 |
JP2004301779A (ja) | 2004-10-28 |
EP1615043A1 (en) | 2006-01-11 |
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