CN103837833A - Method for estimating of battery's state by measuring battery impedence and battery management apparatus - Google Patents
Method for estimating of battery's state by measuring battery impedence and battery management apparatus Download PDFInfo
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- CN103837833A CN103837833A CN201310294130.6A CN201310294130A CN103837833A CN 103837833 A CN103837833 A CN 103837833A CN 201310294130 A CN201310294130 A CN 201310294130A CN 103837833 A CN103837833 A CN 103837833A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- 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]
- G01R31/3644—Constructional arrangements
- G01R31/3646—Constructional arrangements for indicating electrical conditions or variables, e.g. visual or audible indicators
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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]
- G01R31/374—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with means for correcting the measurement for temperature or ageing
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- General Physics & Mathematics (AREA)
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
The disclosure relates to a method for estimating of battery's state by measuring battery impedence and a battery management apparatus using same; the method for estimating of battery's state by measuring the battery impedence comprises the following steps: at least sensing voltage, current and temperature of at least one cell of a cell pack formed by the cells; measuring a charging state or impedence of the cell according to the sensed information; extracting reference impedence of the cell from a lookup table according to at least one index from a group formed by frequency, temperature and charging state; comparing the reference impedence with the measured impedence, thereby deciding the cell state. When the cell impedence is calculated, the temperature and charging state are taken into consideration, so the cell impedence can compensate the changes along with the temperature and charging state; degradation of the cell can be informed to a user as a warning, thereby preventing impedence abnormal increasing phenomenon before happening.
Description
Technical field
The invention relates to the method by measuring impedance measurement battery status and utilize this cell managing device, more specifically, be about the voltage take sensed, electric current and temperature as the impedance of basic calculation be basis, measure the method for battery status and utilize this cell managing device.
Background technology
Generally speaking, hybrid vehicle uses multiple power source of car engine and battery to start.
This hybrid vehicle has in the time stopping, and due to stopping of engine, Fuel Consumption is reduced, in the time of vehicle deceleration, make battery automatic charging produce electric power energy, in the time that vehicle accelerates, be connected in the suitable distributed power of engine of engine and battery, the advantage that Fuel Consumption is reduced.
Otherwise because hybrid vehicle is to use multiple power sources, the not only management to engine, also becomes extremely important problem to the management of battery.
Due to this reason, in order to infer or measure charged state or the deterioration state etc. of battery, thereby follow the trail of the technology of charged state that battery impedance infers battery by motion.But existing tracking battery charging state, does not consider the problem that causes battery impedance variation according to temperature, can not follow the trail of correct charged state.
According to this, take temperature as basis, effectively judge the deterioration state of battery etc., require to grope the scheme in order to calculate battery impedance.
Summary of the invention
(technical matters that will solve)
The present invention is proposed by solution problem as above, the invention provides the method by measuring impedance measurement battery status, its object is, consider the temperature of battery and the impedance that charged state is calculated battery, the indivedual batteries that form electric battery in order to check have or not extremely, and then the abnormal occurrence of battery system is prevented in the first place.
(means of dealing with problems)
According to one embodiment of the invention, by measuring the method for impedance measurement battery status, comprising: in the electric battery being formed by multiple batteries, in the voltage of at least one battery, electric current and temperature, at least respond to the stage of one; Take the described information sensing as basis, measure the stage of the charged state of described battery or the impedance of described battery; In frequency, temperature and charged state, extract at least according to the stage of the reference impedance of the described battery of one of them at look-up table; And the impedance comparison of described reference impedance and described measurement, determine stage of the state of described battery.
Here, described phase of sensitization is, applies the 1st signal having than the frequency that setpoint frequency is high at described battery, in the voltage of described battery and electric current, at least responds to one.The described extraction stage is, in the charged state of the frequency of described the 1st signal, the temperature of described induction and described measurement, can extract at least according to the reference impedance of the described battery of one of them at look-up table.
In addition, determine that described state phase is, take described the 1st signal as benchmark, reference impedance described in the impedance contrast of described measurement, the situation in setting range, determines as normal condition.Take described the 1st signal as benchmark, reference impedance described in the impedance contrast of described measurement, the situation beyond setting range, determines as abnomal condition.Be after the engine ON of automobile of power use described battery, can make to detect lamp and light.
On the other hand, according to the method for passing through to measure impedance measurement battery status of one embodiment of the invention, also comprise: if judge that described battery is that state is normal, apply the 2nd signal with the frequency lower than described setpoint frequency at described battery, in the voltage of described battery and electric current, at least append the stage of one of induction; Take described information of appending induction as basis, append the stage of the impedance of measuring described battery; And in the frequency of described the 2nd signal, the temperature of described induction and the charged state of described measurement, append extraction at least according to the stage of the reference impedance of the described battery of one of them at look-up table; And the impedance comparison of described reference impedance and described measurement, append the stage of the state that determines described battery.
In addition, append and determine that stage of described state is, take described the 2nd signal as benchmark, reference impedance described in the impedance contrast of described measurement, the situation in setting range, appends and determines as normal condition.Take described the 2nd signal as benchmark, reference impedance described in the impedance contrast of described measurement, the situation beyond setting range, appends and determines as abnomal condition.Be after the engine ON of vehicle of power use described battery, can make to detect lamp and light.
Then, described temperature is, described battery be the engine of the automobile that uses of power after OFF, at setting-up time with internal induction.Described charged state is, within the described time of having set, take the temperature responded to as basic measurement.
On the other hand, for reaching described object, according to the cell managing device of one embodiment of the invention, comprising: signal generating unit, generates and have than the 1st signal of the frequency that setpoint frequency is high, and have the 2nd signal of the frequency lower than the described frequency of having set; Calculating part, the battery that described the 1st signal or the 2nd signal are applied, in sensed voltage, electric current and temperature, at least, take one of them as basis, measures the charged state of described battery or the impedance of described battery; Storage part, in frequency, temperature and charged state, at least saves as look-up table according to the reference impedance of the described battery of one of them; And control part, the impedance comparison of described reference impedance and described measurement, determine the state of described battery.
(effect of invention)
Identical therewith, temperature and the charged state of consideration in the time calculating battery impedance calculated, and then battery impedance can compensate the variation along with temperature and charged state, the deteriorated of battery is provided in to user with warning, the abnormal increase phenomenon of impedance can be prevented in the first place.
Accompanying drawing explanation
Fig. 1 is according to one embodiment of the invention, the drawing of the block diagram of diagram cell managing device.
Fig. 2 is according to one embodiment of the invention, for the process flow diagram of the method by measuring impedance measurement battery status is described.
(label declaration)
100: cell managing device 110: signal generating unit
120: voltage/current induction part 130: temperature induction part
140:SOC/ impedance computation portion 150: control part
160: storage part
Embodiment
With reference to the accompanying drawings, further describe the present invention.
Fig. 1 is according to one embodiment of the invention, the drawing of the block diagram of diagram cell managing device 100.
According to the present embodiment cell managing device 100, its application target is, in order to manage/judge the state etc. of the battery that the electric motor of dynamic origin of motor vehicle driven by mixed power drives.
This cell managing device 100 by, signal generating unit 110, voltage/current induction part 120, temperature induction part 130, SOC (State Of Charge, charged state)/impedance computation portion 140, control part 150 and storage part 160 form.
The rate response when sine wave signal of voltage/current induction part 120 by cell device high frequency and low frequency and square-wave signal are applied in, voltage or the electric current of induced cell element respectively.
Battery charging state and the impedance of vehicle calculated by SOC/ impedance computation portion 140.Here, by be applied for the voltage/current of battery in signal generating unit 110, and the voltage/current computing impedance of the battery of responding at voltage/current induction part 120.For example, AC impedance in the time applying electric current, being likely the voltage (Z=V (out)/I (in)) that the electric current to applying is exported, is likely the electric current applying (Z=V (in)/I (out)) of AC impedance while the applying voltage electric current to output.
The look-up table that control part 150 is preserved at storage part 160, extract according to the impedance of high frequency with according to the impedance of low frequency, the impedance of relatively calculating in SOC/ impedance computation portion 140, judges the state of battery.
Particularly, having at the resistance value of high frequency standard can be in the common applicable value of all batteries, resistance value at low frequency benchmark changes and is suitable for according to battery, therefore the preferential impedance of comparing at high frequency standard of control part 150, if comparative result judges that battery status is for normal for the 1st time, carry out the impedance comparison at low frequency benchmark, judge the 2nd time whether normal.
Below, with reference to Fig. 2, to the method according to comparing impedance measurement battery status, be described in detail.
Fig. 2 is according to one embodiment of the invention, for the process flow diagram of the method by measuring impedance measurement battery status is described.
First, control part 150 control signal generating units 110, make indivedual batteries apply the high-frequency signal (S210) of 1000Hz.
Voltage/current induction part 120 is that induction is in the voltage/current of battery output, the temperature of temperature induction part 130 induced cells.SOC/ impedance computation portion 140 is that, under the control of control part, with the voltage and the electric current that apply, also having voltage and the electric current of output is basic calculation impedance (S220).
While applying the high frequency of 1000Hz, if the AC impedance of measuring contrast reference impedance is more than 120% (S240-N), it is abnormal that control part 150 judges that battery exists, and in the time of engine ON, makes the detection lamp in vehicle light (S250) afterwards.
On the other hand, while applying the high frequency of 1000Hz, if the AC impedance of measuring contrasts reference impedance value than 120% little (S240-Y), control part 150 judges that battery is not abnormal for the 1st time, control signal generating unit 110, makes indivedual batteries apply the low frequency signal (S260) of 2Hz.
Afterwards, SOC/ impedance computation portion 140 is that, under the control of control part, with the voltage and the electric current that apply, also having the voltage of output and electric current is basis, the impedance (S270) of calculating 2Hz benchmark.Take calculate result as basis, judge measurement impedance whether low than 1.25 times of reference impedance
（S280）。
While applying the low frequency of 2Hz, if the AC impedance of measuring contrast reference impedance is more than 125% (S280-N), it is abnormal that control part 150 judges that battery exists, and in the time of engine ON, makes the detection lamp in vehicle light (S250) afterwards.
Reverse side, in the time applying the low frequency of 2Hz, if the AC impedance of measuring contrast reference impedance value less than 125% (S280-Y), control part 150 judges that battery is not abnormal for the 2nd time, makes the impedance data obtaining be kept at storage part 160(S290).
Above with reference to accompanying drawing, the embodiments of the invention that illustrate, but above-mentioned of the present invention technical formation, the practitioner of the technical field under the present invention, do not change its technical thought of the present invention or indispensability feature, be appreciated that and can other forms implement.Therefore be appreciated that as being in exemplary indefiniteness in all directions at the above embodiment describing.Meanwhile, scope of the present invention is compared with above-mentioned detailed description, be according to after the claim scope chatted shown.In addition, also have all changes of concept derivation of equal value therewith or the form of distortion from meaning and the scope of claim scope, be interpreted as being included in scope of the present invention.
Especially,, at the above battery unit to, suppose that relatively AC impedance describes, but this impedance comparison goes for forming each battery of electric battery certainly.
In addition, in the above frequency as symbol High-frequency and low-frequency, suppose 1000Hz and 2Hz, but technical thought of the present invention cannot be interpreted as and be defined in this frequency, and after determining reference frequency, as the frequency higher than this reference frequency, as the frequency higher than reference frequency, use as high frequency take the frequency that is applicable to all batteries of common point, as the frequency lower than reference frequency, can be suitable for frequency at indivedual batteries and use the situation for low frequency, also can be suitable for by the present invention.
Claims (10)
1. by measuring a method for impedance measurement battery status, it is characterized in that, comprising:
In the electric battery being formed by multiple batteries, in the voltage of at least one battery, electric current and temperature, at least respond to the stage of one;
Take the described information sensing as basis, measure the stage of the charged state of described battery or the impedance of described battery;
In frequency, temperature and charged state, extract at least according to the stage of the reference impedance of the described battery of one of them at look-up table; And
The impedance phase comparison of described reference impedance and described measurement, determines stage of the state of described battery.
2. the method for passing through to measure impedance measurement battery status according to claim 1, is characterized in that,
Described phase of sensitization is,
Apply the 1st signal having than the frequency that setpoint frequency is high at described battery, in the voltage of described battery and electric current, at least respond to one,
The described extraction stage is,
The frequency of described the 1st signal, described in the charged state of the temperature that senses and described measurement, extract at least according to the reference impedance of the described battery of one of them at look-up table.
3. the method for passing through to measure impedance measurement battery status according to claim 2, is characterized in that,
Determine that described state phase is,
Take described the 1st signal as benchmark, reference impedance described in the impedance contrast of described measurement, the situation in setting range, determines as normal condition,
Take described the 1st signal as benchmark, reference impedance described in the impedance contrast of described measurement, the situation beyond setting range, determines as abnomal condition, is after the engine ON of automobile of power use described battery, can make to detect lamp and light.
4. the method for passing through to measure impedance measurement battery status according to claim 3, is characterized in that,
Described the 1st signal is the signal with frequency within the scope of 500～2000Hz,
Contrasting the scope that described reference impedance set is to contrast the scope of described reference impedance 120%.
5. the method for passing through to measure impedance measurement battery status according to claim 2, is characterized in that, also comprises:
If judge that described battery is normal condition, apply the 2nd signal with the frequency lower than described setpoint frequency at described battery, in the voltage and electric current of described battery, at least append the stage of one of induction;
Take described information of appending induction as basis, append the stage of the impedance of measuring described battery; And
In the charged state of the frequency of described the 2nd signal, the temperature of described induction and described measurement, append extraction at least according to the stage of the reference impedance of the described battery of one of them at look-up table; And
The impedance comparison of described reference impedance and described measurement, append the stage of the state that determines described battery.
6. the method for passing through to measure impedance measurement battery status according to claim 5, is characterized in that,
Append and determine that stage of described state is,
Take described the 2nd signal as benchmark, reference impedance described in the impedance contrast of described measurement, the situation in setting range, appends and determines as normal condition,
Take described the 2nd signal as benchmark, reference impedance described in the impedance contrast of described measurement, the situation beyond setting range, appends and determines as abnomal condition, is after the engine ON of vehicle of power use described battery, can make to detect lamp and light.
7. the method for passing through to measure impedance measurement battery status according to claim 6, is characterized in that,
Described the 2nd signal is the signal with frequency within the scope of 1～4Hz,
Contrast described reference impedance setting range be to contrast described reference impedance in 125% scope.
8. the method for passing through to measure impedance measurement battery status according to claim 1, is characterized in that,
Described temperature is, is after the engine OFF of the automobile that uses of power described battery, at setting-up time with internal induction,
Described charged state is, within the described time of having set, take the temperature that senses as basic measurement.
9. a cell managing device, is characterized in that, comprising:
Signal generating unit, generates and has than the 1st signal of the frequency that setpoint frequency is high, and have the 2nd signal of the frequency lower than described setpoint frequency;
Calculating part, the battery that described the 1st signal or described the 2nd signal are applied, in sensed voltage, electric current and temperature, at least, take one of them as basis, measures the charged state of described battery or the impedance of described battery;
Storage part, in frequency, temperature and charged state, at least saving as look-up table according to the reference impedance of the described battery of one of them; And
Control part, the impedance comparison of described reference impedance and described measurement, determines the state of described battery.
10. cell managing device according to claim 9, is characterized in that,
Described control part is,
Reference impedance while applying the 1st signal, with the impedance comparison that applies described the 1st signal measurement, confirms the state of described battery the 1st time,
Reference impedance while applying the 2nd signal, with the impedance comparison that applies described the 2nd signal measurement, confirms the state of described battery the 2nd time,
If described the 1st confirmation result and described the 2nd confirmation result are all confirmed as normally, determine that the end-state of described battery is for normal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2012-0133487 | 2012-11-23 | ||
| KR1020120133487A KR20140066361A (en) | 2012-11-23 | 2012-11-23 | Method for estimating of battery's state by measuring battery impedence and battery management apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN103837833A true CN103837833A (en) | 2014-06-04 |
| CN103837833B CN103837833B (en) | 2017-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310294130.6A Active CN103837833B (en) | 2012-11-23 | 2013-07-12 | Method for estimating of battery's state by measuring battery impedence and battery management apparatus |
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| KR (1) | KR20140066361A (en) |
| CN (1) | CN103837833B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106740849A (en) * | 2015-11-24 | 2017-05-31 | 通用汽车环球科技运作有限责任公司 | With the fault-tolerant drivetrain system for sliding control logic |
| CN106772099A (en) * | 2017-01-23 | 2017-05-31 | 合肥国轩高科动力能源有限公司 | A kind of dynamic lithium battery degradation evaluation method |
| WO2018080043A1 (en) * | 2016-10-25 | 2018-05-03 | 주식회사 엘지화학 | Secondary battery and lifespan prediction device therefor |
| US10220835B2 (en) | 2017-03-01 | 2019-03-05 | GM Global Technology Operations LLC | Power control systems and methods for mixed voltage systems |
| CN111077464A (en) * | 2018-10-22 | 2020-04-28 | 现代摩比斯株式会社 | Direct current converter capable of monitoring battery condition and battery condition monitoring method thereof |
| CN117533195A (en) * | 2024-01-10 | 2024-02-09 | 北京航空航天大学 | Power battery management method based on active impedance test |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102156866B1 (en) * | 2014-11-14 | 2020-09-17 | 한국전기연구원 | Apparatus for forecasting life cycle of battery based on AC impedance by using very low current |
| KR20210011236A (en) * | 2019-07-22 | 2021-02-01 | 주식회사 엘지화학 | Apparatus and method for diagnosing battery resistance |
| EP4185881A1 (en) | 2020-07-24 | 2023-05-31 | Analog Devices International Unlimited Company | Tracking state of charge of a non-rechargeable battery using impedance spectroscopy |
| KR102438775B1 (en) * | 2021-09-17 | 2022-09-01 | 모나일렉트릭 주식회사 | Impedance measurement apparatus and method |
| KR102635656B1 (en) * | 2021-12-23 | 2024-02-08 | 현대오토에버 주식회사 | Fire Detection System for Electric Vehicle and its Controlling Method for the same |
| KR20230171658A (en) * | 2022-06-14 | 2023-12-21 | 주식회사 엘지에너지솔루션 | Apparatus and method for estimating battery parameter |
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Cited By (11)
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| US10220835B2 (en) | 2017-03-01 | 2019-03-05 | GM Global Technology Operations LLC | Power control systems and methods for mixed voltage systems |
| CN111077464A (en) * | 2018-10-22 | 2020-04-28 | 现代摩比斯株式会社 | Direct current converter capable of monitoring battery condition and battery condition monitoring method thereof |
| US11585856B2 (en) | 2018-10-22 | 2023-02-21 | Hyundai Mobis Co., Ltd. | Direct current converter capable of monitoring battery condition and battery condition monitoring method thereof |
| US11913994B2 (en) | 2018-10-22 | 2024-02-27 | Hyundai Mobis Co., Ltd. | Direct current converter capable of monitoring battery condition and battery condition monitoring method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103837833B (en) | 2017-05-03 |
| KR20140066361A (en) | 2014-06-02 |
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