WO2010029942A1 - 電池状態検知装置及びそれを内蔵する電池パック、並びに電池状態検知方法 - Google Patents
電池状態検知装置及びそれを内蔵する電池パック、並びに電池状態検知方法 Download PDFInfo
- Publication number
- WO2010029942A1 WO2010029942A1 PCT/JP2009/065745 JP2009065745W WO2010029942A1 WO 2010029942 A1 WO2010029942 A1 WO 2010029942A1 JP 2009065745 W JP2009065745 W JP 2009065745W WO 2010029942 A1 WO2010029942 A1 WO 2010029942A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- secondary battery
- charging
- battery
- internal resistance
- resistance value
- Prior art date
Links
Images
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]
-
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- 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
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M10/24—Alkaline accumulators
- H01M10/30—Nickel accumulators
-
- 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
Definitions
- the present invention relates to a battery state detection device that detects the state of a secondary battery that supplies power to an electric load such as an electronic device, a battery pack that incorporates the battery state detection device, and a battery state detection method.
- Patent Document 1 As an abnormal phenomenon of a secondary battery such as a lithium ion battery, a micro short circuit phenomenon between a negative electrode and a positive electrode is known.
- Japanese Patent Application Laid-Open No. 2004-228561 discloses details about the micro short circuit and a method for detecting the presence or absence of the micro short circuit.
- the method disclosed in Patent Document 1 is a battery composed of a positive electrode, a negative electrode, and a separator and an electrolytic solution arranged so as to isolate both, and the electrolytic solution is in a solid state, and an AC impedance is provided between the positive electrode and the negative electrode. It measures and determines the presence or absence of a short circuit by the measured value.
- the present invention aims to provide a battery state detection device, a battery pack incorporating the same, and a battery state detection method capable of detecting a minute short circuit of the secondary battery regardless of the situation surrounding the secondary battery.
- a battery state detection device includes: A remaining capacity calculating means for calculating a remaining capacity of the secondary battery; A full charge capacity calculating means for calculating a full charge capacity of the secondary battery; The charging capacity charged during the charging of the secondary battery, the remaining capacity calculated at the calculation timing immediately before the charging starts by the remaining capacity calculating means, and before the charging starts by the full charge capacity calculating means By detecting that the secondary battery is overcharged based on the calculated full charge capacity, a micro short-circuit determining means for determining a micro short-circuit of the secondary battery; Output means for outputting a signal corresponding to the determination result of the minute short-circuit determination means.
- a battery state detection device includes: An internal resistance value calculating means for calculating an internal resistance value of the secondary battery; By detecting that the internal resistance value calculated by the internal resistance value calculating means is decreasing from its initial value, a micro short-circuit determining means for determining a micro short-circuit of the secondary battery, Output means for outputting a signal corresponding to the determination result of the minute short-circuit determination means.
- a battery pack according to the present invention incorporates the battery state detection device and the secondary battery.
- a battery state detection method includes: A minute short circuit of the secondary battery is determined by detecting that a charge capacity exceeding the charge capacity capable of charging the secondary battery is charged during the charging of the secondary battery.
- a battery state detection method includes: By detecting that the internal resistance value of the secondary battery has decreased from its initial value, a minute short circuit of the secondary battery is determined.
- FIG. 1 is an overall configuration diagram of an intelligent battery pack 100A that is an embodiment of a battery pack according to the present invention.
- FIG. It is a flowchart which detects the micro short circuit of a secondary battery based on charge capacity. It is a calculation flow of the internal resistance value of the management system in the battery pack 100A. It is the 1st determination flow of a micro short circuit. It is the 2nd determination flow of a micro short circuit. It is the 3rd determination flow of a micro short circuit. It is a 4th determination flow of a micro short circuit. It is data showing the relationship between the number of charge / discharge cycles and the charge capacity charged in the secondary battery before the charge stops in each charge / discharge cycle. It is data showing the relationship between the number of charge / discharge cycles and the internal resistance value in each charge / discharge cycle. It is a sequence of charge detection.
- FIG. 5 is a diagram showing an “open-circuit voltage-charge rate” characteristic at 25 ° C.
- FIG. 1 is an overall configuration diagram of an intelligent battery pack 100A that is an embodiment of a battery pack according to the present invention.
- the battery pack 100A includes a temperature detection unit 10 that detects the ambient temperature of the secondary battery 200 such as a lithium ion battery, a nickel metal hydride battery, and an electric double layer capacitor, a voltage detection unit 20 that detects the voltage of the secondary battery 200, A current detection unit 30 that detects a charging / discharging current of the secondary battery 200, an AD converter (hereinafter referred to as "ADC") 40 that converts an analog voltage value output from each detection unit indicating a detection result into a digital value,
- An arithmetic processing unit 50 for example, a microcomputer including a CPU 51, a ROM 52, a RAM 53, etc.
- arithmetic processing such as current integration, capacity correction, and dischargeable capacity
- a memory 60 (for example, EEPROM or flash memory) that stores characteristic data for specifying the characteristics of each component of
- a communication processing unit 70 (for example, a communication IC) that transmits battery state information related to the secondary battery 200 to the portable device 300 that uses the secondary battery 200 as a power source, and manages time.
- a battery state detection device including a timer unit 80 and a startup current detection unit 31 that detects the startup current of the portable device 300 according to the detection result of the current detection unit 30 is incorporated as a management system that manages the battery state. .
- Some or all of these components of the battery state detection device may be constituted by an integrated circuit.
- the battery pack 100A is a module component that combines the secondary battery 200 and a management system that manages the battery state.
- the battery pack 100 ⁇ / b> A is connected to the mobile device 300 via the electrode terminals (the positive terminal 1 and the negative terminal 2) and the communication terminal 3.
- the positive electrode terminal 1 is electrically connected to the positive electrode of the secondary battery 200 via an energization path
- the negative electrode terminal 2 is electrically connected to the negative electrode of the secondary battery 200 via an energization path.
- the communication terminal 3 is connected to the communication processing unit 70.
- the communication processing unit 70 is an output unit that outputs notification information based on the processing result of the arithmetic processing unit 50 to the mobile device 300.
- the portable device 300 is an electronic device that can be carried by a person, and specifically includes a mobile phone, an information terminal device such as a PDA or a mobile personal computer, a camera, a game machine, a player such as music or video, and the like.
- the battery pack 100A is built in or externally attached to the mobile device 300.
- the portable device 300 performs a predetermined operation according to the battery state information based on the battery state information acquired from the communication processing unit 70. For example, the portable device 300 displays battery state information on a display unit such as a display (for example, displays remaining amount information, deterioration information, replacement time information, etc. of the secondary battery 200), or based on the battery state information. (E.g., change from the normal power consumption mode to the low power consumption mode).
- the secondary battery 200 is a power source for the portable device 300, and is also a power source for the ADC 40, the arithmetic processing unit 50, the communication processing unit 70, and the timer 80. Moreover, about the temperature detection part 10, the voltage detection part 20, the current detection part 30, and the starting current detection part 31, the electric power feeding from the secondary battery 200 may be needed according to those circuit structures. As for the memory 60, the stored contents are retained even when the power supply from the secondary battery 200 is cut off.
- the temperature detection unit 10, the voltage detection unit 20, the current detection unit 30, the ADC 40, and the arithmetic processing unit 50 function as a state detection unit that detects the battery state of the secondary battery 200.
- the temperature detection unit 10 detects the ambient temperature of the secondary battery 200, converts the detected ambient temperature into a voltage that can be input to the ADC 40, and outputs the voltage.
- the digital value of the battery temperature indicating the ambient temperature of the secondary battery 200 converted by the ADC 40 is transmitted to the arithmetic processing unit 50 and used as a parameter for the arithmetic processing.
- the digital value of the battery temperature is converted into a predetermined unit by the arithmetic processing unit 50 and is output to the portable device 300 through the communication processing unit 70 as battery state information indicating the battery state of the secondary battery 200.
- the temperature detection unit 10 detects not only the temperature of the secondary battery 200 itself and its ambient temperature, but also the temperature of the battery pack 100A and its components. You may do it.
- the temperature detection part 10 is comprised with an integrated circuit with the voltage detection part 20, the current detection part 30, and ADC40, the temperature detection part 10 can detect the temperature of the integrated circuit itself, and its atmospheric temperature.
- the voltage detection unit 20 detects the voltage of the secondary battery 200, converts the detected voltage into a voltage that can be input to the ADC 40, and outputs the voltage.
- the digital value of the battery voltage indicating the voltage of the secondary battery 200 converted by the ADC 40 is transmitted to the arithmetic processing unit 50 and used as a parameter for the arithmetic processing.
- the digital value of the battery voltage is converted into a predetermined unit by the arithmetic processing unit 50, and is output to the portable device 300 via the communication processing unit 70 as battery state information indicating the battery state of the secondary battery 200.
- the current detection unit 30 detects the charge / discharge current of the secondary battery 200, converts the detected current into a voltage that can be input to the ADC 40, and outputs the voltage.
- the current detection unit 30 includes a current detection resistor 30a connected in series with the secondary battery 200 and an operational amplifier that amplifies the voltage generated at both ends of the current detection resistor 30a.
- the current detection resistor 30a and the operational amplifier are used to charge and discharge current. To voltage.
- the operational amplifier may be provided in the ADC 40.
- the digital value of the battery current indicating the charging / discharging current of the secondary battery 200 converted by the ADC 40 is transmitted to the arithmetic processing unit 50 and used as a parameter for the arithmetic processing.
- the digital value of the battery current is converted into a predetermined unit by the arithmetic processing unit 50, and is output to the portable device 300 via the communication processing unit 70 as battery state information indicating the battery state of the secondary battery 200.
- the arithmetic processing unit 50 calculates the remaining capacity of the secondary battery 200. Any appropriate method may be used as the remaining capacity calculation method, and the calculation method is exemplified below.
- the arithmetic processing unit 50 integrates the current value detected by the current detection unit 30 in a charged state or a discharged state of the secondary battery 200 (for example, a state where a current of a predetermined value or more is consumed by the operation of the portable device 300). As a result, the amount of electricity charged and discharged in the secondary battery 200 can be calculated, and the current amount of electricity (remaining capacity) stored in the secondary battery 200 can be calculated. In calculating the remaining capacity, for example, in Japanese Patent Application Laid-Open No. 2004-226393, when conditions such as temperature and current change in charging / discharging of the secondary battery, the charging / discharging efficiency does not change but each charging / discharging efficiency is changed. There is disclosed an idea that there is an amount of electricity that cannot be temporarily charged or discharged according to conditions, and the amount changes. According to this concept, the correction process for the charge / discharge efficiency may not be performed.
- the arithmetic processing part 50 detects the ambient temperature by the temperature detection part 10 and obtains the “charge / discharge current-temperature” characteristic. Based on this, the charge / discharge current value of the secondary battery 200 converted by the ADC 40 may be corrected.
- the “charge / discharge current-temperature” characteristic is represented by a correction table or a correction function. Data in the correction table and coefficients of the correction function are stored in the memory 60 as characteristic data.
- the arithmetic processing unit 50 corrects the charge / discharge current value according to the temperature measured by the temperature detection unit 10 in accordance with a correction table or correction function reflecting the characteristic data read from the memory 60.
- the charging / discharging of the secondary battery 200 is in a dormant state (for example, the operation of the mobile device 300 is stopped or in a standby state)
- the charging current value becomes smaller than that in the charged state or the discharged state.
- the measurement by the current detection unit 30 or the ADC 40 includes a lot of errors or the measurement is impossible for a certain period due to reasons such as resolution, an error in the above-described current integration process for calculating the remaining capacity. Is accumulated, the accuracy of remaining capacity calculation is lost.
- the arithmetic processing unit 50 may stop the current value integration process or store the current consumption value of the portable device 300 measured in advance in the memory 60 and integrate the values. .
- the calculation processing unit 50 periodically measures the voltage (open voltage) of the secondary battery 200 when the portable device 300 is in a suspended state for a predetermined time.
- the charging rate is calculated and corrected based on the “open-circuit voltage-charging rate” characteristic (see FIG. 11).
- the open circuit voltage is a voltage between both electrodes measured with a high impedance or between the electrodes of the stable secondary battery 200 opened.
- the charging rate means a percentage of the remaining capacity of the secondary battery 200 displayed in% when the full charge capacity of the secondary battery 200 at that time is 100.
- the “open-circuit voltage-charge rate” characteristic is represented by a correction table or a correction function.
- the arithmetic processing unit 50 calculates and corrects the charging rate corresponding to the open-circuit voltage measured by the voltage detection unit 20 in accordance with a correction table or correction function reflecting the characteristic data read from the memory 60.
- the arithmetic processing unit 50 may perform a predetermined temperature correction for the open circuit voltage.
- the arithmetic processing unit 50 may detect the ambient temperature by the temperature detection unit 10 and correct the open-circuit voltage of the secondary battery 200 converted by the ADC 40 based on the “open-circuit voltage-temperature” characteristic.
- the “open voltage-temperature” characteristic is represented by a correction table or a correction function. Data in the correction table and coefficients of the correction function are stored in the memory 60 as characteristic data.
- the arithmetic processing unit 50 corrects the open-circuit voltage according to the temperature measured by the temperature detection unit 10 according to a correction table or correction function reflecting the characteristic data read from the memory 60.
- the arithmetic processing unit 50 can calculate the charging rate of the secondary battery 200, but the remaining capacity of the secondary battery 200 can be calculated based on the relationship between the full charge capacity and the charging rate. Therefore, the remaining capacity of the secondary battery 200 cannot be calculated unless the full charge capacity of the secondary battery 200 is measured or estimated.
- Examples of a method for calculating the full charge capacity of the secondary battery 200 include a method for calculating based on the discharge amount of the secondary battery 200 and a method for calculating based on the charge amount. For example, when the calculation is based on the charge amount, charging is performed at a constant voltage or constant current except for pulse charging, so that the calculation is based on the discharge amount that is easily influenced by the current consumption characteristics of the mobile device 300. Accurate charging current can be measured. Of course, which method is to be used may be selected in consideration of the characteristics of the mobile device 300 or both.
- the condition under which the full charge capacity can be accurately measured is that the battery is continuously charged from the state where the remaining capacity is zero to the full charge state, and the current value accumulated during this charge period is Fully charged capacity.
- such charging is rarely performed, and charging is normally performed from a state where there is a certain remaining capacity.
- the arithmetic processing unit 50 calculates the full charge capacity of the secondary battery 200 based on the battery voltage immediately before the start of charging and the battery voltage when a predetermined time has elapsed since the end of charging. To do. That is, the arithmetic processing unit 50 calculates the charge rate immediately before the start of charge based on the battery voltage immediately before the start of charge and the “open voltage-charge rate” characteristic (see FIG. 11), and at a predetermined time from the end of charge. Based on the battery voltage at the time of elapse and the “open-circuit voltage-charging rate” characteristic (see FIG. 11), the charging rate at the elapse of a predetermined time from the end of charging is calculated.
- the battery state detection device of the present embodiment detects such a short-circuit phenomenon of the secondary battery 200 and prompts the user of the portable device 300 to replace the battery pack 100A, resulting in such a malfunction. Prevent in advance.
- this point will be described in detail.
- FIG. 8 is data representing the relationship between the number of charge / discharge cycles and the charge capacity charged in the secondary battery before the charge stops in each charge / discharge cycle.
- the charge capacity on the vertical axis indicates the charge capacity as a percentage when the full charge capacity when the secondary battery is new is 100.
- the amount of electricity stored in the secondary battery when charging of the secondary battery stops corresponds to the full charge capacity of the secondary battery at that time. As shown in FIG.
- the amount of electricity that can be charged into the secondary battery decreases as the number of charge / discharge cycles increases, but decreases due to a decrease in full charge capacity, but increases when a micro short circuit occurs temporarily.
- a momentary increase in charge capacity in a certain charge / discharge cycle indicates that a short circuit has occurred temporarily in that charge / discharge cycle, and the normal state in which there is no short circuit in the subsequent charge / discharge cycle It shows that it has returned to.
- the full charge capacity calculation is performed by calculating the total value of the charge capacity charged during charging of the secondary battery and the remaining capacity calculated at the calculation timing immediately before the start of charging by the remaining capacity calculation means.
- the secondary short-circuit is judged. To do.
- the total value exceeds the full charge capacity, it can be determined that a micro short circuit has occurred in the secondary battery.
- FIG. 2 is a flowchart for detecting a minute short circuit of the secondary battery based on the charge capacity.
- the arithmetic processing unit 50 is detected by the current detection unit 30.
- the charging capacity Qchg is calculated by integrating the charging current value I (step 3). Note that if charging of the secondary battery 200 is not detected in step 1, the value of the charging capacity Qchg is set to zero (step 2).
- the arithmetic processing unit 50 When the charging capacity added during charging of the secondary battery 200 exceeds the charging capacity that can be charged to the secondary battery 200 and overcharge occurs, the arithmetic processing unit 50 generates a micro short circuit in the secondary battery 200. It is determined that That is, the charging capacity added to the secondary battery 200 during charging is Qchg, the remaining capacity calculated at the calculation timing immediately before the start of charging is Qrem, and the previous charging that is the calculation timing before the charging starts.
- the full charge capacity calculated at the calculation timing immediately before the start is Qbat, and a positive coefficient of 1 or more is K
- the arithmetic processing unit 50 Qrem + Qchg) / Qbat> K (2) Is established (step 4), it is determined that the secondary battery 200 is slightly short-circuited (step 5).
- K 1 may be used, but in consideration of measurement and calculation errors, K may be set to a positive number greater than 1 (for example, a value between 1.2 and 1.5) in order to prevent erroneous determination of a short circuit. . If the relational expression (2) is not established, it can be considered that the step 200 is not short-circuited, so the process returns to step 1.
- the arithmetic processing unit 50 may determine that the secondary battery 200 is slightly short-circuited when the charging capacity in the middle of charging exceeds the charging capacity capable of charging the secondary battery. It is determined that a minute short circuit has occurred in the secondary battery 200 when the charge capacity charged from the start of charging to the battery 200 to the end (stop) exceeds the charge capacity capable of charging the secondary battery. May be.
- step 6 the communication processing unit 70 transmits to the portable device 300 the occurrence information of the minute short circuit of the secondary battery 200 determined by the arithmetic processing unit 50.
- the warning information based on the generated information is displayed on the display unit of the mobile device 300.
- the warning information may be notified by voice through voice output means such as a speaker of the mobile device 300.
- the arithmetic processing unit 50 may control the protection circuit so as to interrupt the charging path of the secondary battery 200 by outputting a signal for limiting the charging of the secondary battery 200. Thereby, even if a minute short circuit occurs, it is possible to notify the user of the state and to prevent the state of charge from continuing.
- FIG. 9 is data representing the relationship between the number of charge / discharge cycles and the internal resistance value in each charge / discharge cycle. As shown in FIG. 9, the measured value of the internal resistance value of the secondary battery increases as the number of charge / discharge cycles increases, but decreases when a micro short circuit occurs.
- the arithmetic processing unit 50 calculates the internal resistance value of the secondary battery 200, and any appropriate method may be used as a method for calculating the internal resistance value. To do.
- the arithmetic processing unit 50 detects and calculates the current difference of the charge / discharge current in the unit time and the voltage difference of the battery voltage in the same period as the unit time in the unit time including the charging start time of the secondary battery 200. Thus, the internal resistance value of the secondary battery 200 is calculated.
- the internal resistance value immediately before the start of charging is V0
- the charge current immediately before the start of charging is I0
- the battery voltage when the specified time has elapsed since the start of charging is V1
- the charging current when the specified time has elapsed since the start of charging is I1.
- the stable calculation result of the internal resistance value is
- the explanation of the result of the confirmation test conducted to confirm that it is obtained is omitted, the result of this confirmation test shows that the deterioration has progressed compared with the new product and the charge current is different even before and after the start of charging.
- a stable internal resistance value can be calculated based on the voltage value and current difference between the two.
- the arithmetic processing unit 50 detects a pause state in which the charge / discharge current value of the secondary battery 200 is zero or a minute charge / discharge current flows through the secondary battery 200 for a predetermined time, and then is greater than the current value in the pause state.
- the voltage value and current value of the secondary battery 200 in a charging state after a predetermined time has elapsed since the detection of the charging current value equal to or greater than the predetermined value Based on the voltage value and current value of the secondary battery 200 in the resting state before the detection time of the charging current value equal to or greater than the predetermined value, the internal resistance value of the secondary battery 200 is calculated according to the above equation (3). It is good to calculate.
- the arithmetic processing unit 50 can determine whether the calculated internal resistance value has decreased from its initial value (previously stored in the memory 60 or the like), thereby determining a micro short circuit of the secondary battery 200.
- the determination information is transmitted to the mobile device 300 via the communication processing unit 70.
- FIG. 3 is a calculation flow of the internal resistance value of the management system in the battery pack 100A.
- the management system operates mainly by the arithmetic processing unit 50.
- the arithmetic processing unit 50 After initialization of the management system, the arithmetic processing unit 50 performs temperature measurement by the temperature detection unit 10, voltage measurement by the voltage detection unit 20, and current measurement by the current detection unit 30 (step 10).
- the arithmetic processing unit 50 detects the measurement values obtained by these detection units at a predetermined detection cycle, and stores data on the simultaneous points of the voltage value, the current value, and the temperature value in a memory such as the RAM 53.
- This detection cycle takes into consideration the rising characteristics of the battery voltage when charging the secondary battery 200 so that the voltage difference and current difference before and after the rising of the battery voltage when charging the secondary battery 200 can be accurately detected. To be determined.
- the arithmetic processing unit 50 detects a rest state in which a charging / discharging current value is zero or a small charging / discharging current flows for a certain period by the current detecting unit 30, and then the current detected by the current detecting unit 30 is the secondary battery 200. It is determined whether or not it is equal to or greater than a predetermined positive first current threshold for determining the start of charging (steps 10 and 12). If the current detected by the current detection unit 30 at the detection timing of step 10 is not equal to or greater than the first current threshold, the arithmetic processing unit 50 uses the detected voltage, current, and temperature as detection values immediately before the start of charging. , V0, I0, Temp are determined (step 14). After the determination, the process returns to step 10. V0, I0, and Temp are updated until the current detected by the current detection unit 30 in step 12 becomes equal to or greater than the first current threshold.
- the current detected by the current detection unit 30 in step 10 is not equal to or greater than the first current threshold (absolute value), but is zero or a discharge current value (absolute value) greater than a predetermined value greater than zero. Assuming that the detected value is not suitable for calculating the correct internal resistance value, the detected value may be excluded as a current for calculating the internal resistance value.
- step 12 when the current detected by the current detection unit 30 at the detection timing of step 10 is greater than or equal to the first current threshold value, the arithmetic processing unit 50 has started charging the secondary battery 200. Accordingly, the temperature measurement by the temperature detection unit 10, the voltage measurement by the voltage detection unit 20, and the current measurement by the current detection unit 30 are performed again (step 16). The arithmetic processing unit 50 determines whether or not the current detected by the current detection unit 30 in step 16 is greater than or equal to a predetermined second current threshold value that is greater than the first current threshold value (step 18).
- the second current threshold is a determination for determining whether the charging state is stable after the charging current for the secondary battery 200 rises (a charging state in which the fluctuation amount of the charging current is smaller than the rising state of the charging current). It is a threshold value.
- the arithmetic processing unit 50 If the current detected by the current detection unit 30 in step 16 is not equal to or greater than the second current threshold value, the arithmetic processing unit 50 is not suitable for calculating the internal resistance value because the charging current is not yet stable after the start of charging. If there is, this flow ends. On the other hand, when the current detected by the current detection unit 30 in step 16 is equal to or greater than the second current threshold, the arithmetic processing unit 50 regards the charging current as stable and detects the detected voltage and The current is determined as V1 and I1 as detected values when the specified time has elapsed from the start of charging (step 20).
- step 24 the arithmetic processing unit 50 calculates the internal resistance value Rc of the secondary battery 200 according to the arithmetic expression (3).
- the internal resistance value Rc is calculated.
- the first current threshold value for determining the start of charging and the first current threshold value larger than the first current threshold value are calculated.
- the current threshold value of 2 it is possible to reliably capture the charging start time for the secondary battery 200 and use the detected value in a stable charged state for the calculation of the internal resistance value.
- the mobile device 300 operates to intermittently consume current (for example, when switching between the normal power consumption mode and the low power consumption mode is performed intermittently, the steady-state current consumption is 1 mA. If the consumption current periodically becomes 100 mA), and the rising timing of charging overlaps with the detection timing of the current I0 before starting charging or the current I1 after starting charging, the calculation error of the internal resistance value becomes large. However, in consideration of the operating state of the mobile device 300, the calculation error of the internal resistance value can be suppressed by setting the two current threshold values and calculating the internal resistance value as described above.
- the operation state of the mobile device 300 is taken into account, for example, an average value of a plurality of detection values, an average value of a large number of coincidences among the detection values of a plurality of times, and a match of n consecutive times
- the detected value or the like to be used may be adopted as a substitution value for the internal resistance value calculation formula.
- the internal resistance value Rc has the temperature characteristic.
- the open circuit voltage of the secondary battery 200 tends to decrease as the ambient temperature increases.
- the temperature detection unit 10, the voltage detection unit 20, the current detection unit 30, the ADC 40, and the like include analog elements such as resistors, transistors, and amplifiers, they can be temperature-dependent circuit units. Basically, at the design stage of an integrated circuit, it is designed in consideration of the temperature dependence of the elements in the wafer. However, since there are variations in the manufacturing process and variations in the characteristics in the wafer surface, it was manufactured to a small extent. The IC will have temperature characteristics.
- the arithmetic processor 50 calculates the first corrected resistance value Rcomp by correcting the resistance value Rc calculated in step 24 according to the ambient temperature (step 26).
- the “internal resistance value-temperature” characteristic is represented by a correction table or a correction function. Data in the correction table and coefficients of the correction function are stored in the memory 60 as characteristic data.
- the arithmetic processing unit 50 has a first corrected resistance value Rcomp obtained by correcting the internal resistance value Rc according to the temperature at the time of measurement by the temperature detecting unit 10 according to a correction table or correction function reflecting the characteristic data read from the memory 60. Can be calculated.
- the arithmetic processing unit 50 calculates the second corrected resistance value Rcomp2 by correcting the resistance value Rcomp calculated in step 26 according to the remaining capacity (step 28).
- the “internal resistance value ⁇ remaining capacity” characteristic is represented by a correction table or a correction function. Data in the correction table and coefficients of the correction function are stored in the memory 60 as characteristic data.
- the arithmetic processing unit 50 corrects the first corrected resistance value Rcomp with the remaining capacity Q0 immediately before the start of charging according to a correction table or correction function reflecting the characteristic data read from the memory 60. Rcomp2 can be calculated.
- a notification operation for the user of the mobile device 300 or a charge limiting operation for the secondary battery 200 may be performed as described above.
- the calculation processing unit 50 performs a micro short circuit when the calculated value is below a predetermined threshold Th1 (for example, 100 m ⁇ ). (Step 42).
- the calculation processing unit 50 displays the internal resistance value Rmax (memory) indicating the highest measured value in the calculation steps from the previous time to the predetermined number of times. If the difference obtained by subtracting the current internal resistance value Rnew calculated in step 50 from (stored in 60) is larger than a predetermined threshold value Th2 (step 52), it is determined as a micro short circuit. In step 52, when the difference is not larger than the threshold value Th2, if the past maximum internal resistance value Rmax is smaller than the current internal resistance value Rnew (step 54), the internal resistance value Rmax is set to the current value. The internal resistance value Rnew is updated (step 56).
- the calculation processing unit 50 calculates the internal value calculated in the calculation step of the current step 60 from the internal resistance value Rlast in the previous calculation step.
- the difference obtained by subtracting the resistance value Rnew is larger than the predetermined threshold value Th3 (step 62), it is determined that the micro short circuit is present.
- the calculation processing unit 50 detects a minute short circuit when it detects that the internal resistance value decreases continuously for a specified number of times. judge. That is, if the previous internal resistance value Rlast is not greater than the current internal resistance value Rnew, the counter value Count is cleared (step 74), and the previous internal resistance value Rlast is greater than the current internal resistance value Rnew. In this case, the count value Count is incremented (step 76). When the count value Count is larger than the predetermined threshold Th4 (step 78), it is determined that the short circuit is a short circuit.
- the threshold value for determining a short-circuit such as Th1 may be stored in the memory 60.
- the threshold value for determining a short circuit can be easily changed for each specification of the portable device 300 or the secondary battery 200. That is, even if the specification of the portable device 300 to which the battery pack 100A is attached or the specification of the secondary battery 200 built in the battery pack 100A is changed, the micro short-circuit determination can be appropriately performed.
- the arithmetic processing unit 50 uses the initial internal resistance value calculated based on the detection value before starting to supply power to the secondary battery 200 as the determination reference value for the micro short circuit determination. You may perform the determination of the short circuit of the secondary battery 200.
- FIG. The arithmetic processing unit 50 determines the minute short-circuit state of the secondary battery 200 by comparing the initial internal resistance value with the internal resistance value calculated based on the detected value after the power supply to the secondary battery 200 is started. . For example, when it is detected that the difference obtained by subtracting the internal resistance value after the start of power supply from the initial internal resistance value before the start of power supply is greater than a predetermined value, it is determined that the micro short circuit of the secondary battery 200 has progressed.
- the initial internal resistance value is measured before and after the start of charging when the secondary battery 200 is charged for the first time before the battery pack 100A is attached to the portable device 300 (for example, before the battery pack 100A is shipped). Can be calculated based on detected values of voltage and current.
- the arithmetic processing unit 50 calculates an initial internal resistance value based on detection values before and after the start of the first charging, and uses the calculation result for deterioration determination. Is stored in the memory 60 as the determination reference value.
- the initial charging may be performed, for example, by supplying a charging pulse current from the outside of the battery pack 100A from the electrode terminal of the battery pack 100A.
- a dedicated measurement device for detecting a micro short circuit is provided. Not only is it unnecessary to provide it as an external device or as a built-in device of the mobile device 300, but also during a storage period before and after shipping the battery pack as a product, or during a period when a general user uses the mobile device 300 Therefore, it is possible to determine a minute short circuit, and it is possible to determine a minute short circuit that occurred before shipment and a minute short circuit that occurs and grows after shipment.
- a device using a secondary battery is connected to the device main body only when a user purchases a product. Therefore, it is also conceivable that a short circuit has occurred in the storage state until then.
- a detection circuit for a minute short circuit is provided inside the battery pack, even when the battery pack is in a storage state, a detection operation for the minute short circuit can be performed using the built-in secondary battery as a power source.
- the battery information of the secondary battery is acquired on the mobile device side, and a screen prompting replacement of the secondary battery is displayed on the display of the mobile device, A defective battery can be identified before reaching the user's hand.
- the mobile device by telling the mobile device where the battery pack is used that an abnormality such as a micro short circuit has been detected, the mobile device prompts the user to replace the battery, and before the malfunction such as ignition occurs, the battery Can be recovered.
- the internal resistance value calculated based on the detected value before and after the start of charging described above shows a large resistance change at the time of deterioration as compared with the impedance measured by alternating current. For this reason, it is possible to suppress the influence of the error at the time of calculating the resistance value on the deterioration determination for comparing with the determination threshold.
- the battery state is monitored from the initial state, for example, by detecting that the internal resistance value changes from an increasing tendency to a decreasing tendency, it is possible to detect a deterioration abnormality such as a micro short circuit in the battery, The deterioration abnormality can be communicated to the mobile device 300 and its user.
- the calculation process for calculating the internal resistance value based on the detected value before and after the start of charging is performed before and after the start of discharge. Even if it is replaced with a calculation process for calculating the internal resistance value based on the detected value between, the same effect can be obtained with the same idea.
- a voltage drop occurs when charging is stopped for a certain period during constant current charging, the same effect can be obtained by replacing the voltage drop with the start of discharge described above. .
- replacing the voltage increase with the start of charging and the above-described start of charging provides the same effect with the same idea. It is done.
- the optimum detection according to the type of the secondary battery can be detected at the timing.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Tests Of Electric Status Of Batteries (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
二次電池の残容量を算出する残容量算出手段と、
前記二次電池の満充電容量を算出する満充電容量算出手段と、
前記二次電池の充電中に充電された充電容量と前記残容量算出手段によって該充電が開始する直前の算出タイミングで算出された残容量と前記満充電容量算出手段によって該充電が開始する前に算出された満充電容量とに基づいて前記二次電池が過充電されたことを検出することにより、前記二次電池の微小短絡を判断する微小短絡判断手段と、
前記微小短絡判断手段の判断結果に応じた信号を出力する出力手段とを備える。
二次電池の内部抵抗値を算出する内部抵抗値算出手段と、
前記内部抵抗値算出手段によって算出される内部抵抗値がその初期値から減少していることを検出することにより、前記二次電池の微小短絡を判断する微小短絡判断手段と、
前記微小短絡判断手段の判断結果に応じた信号を出力する出力手段とを備える。
二次電池に充電可能な充電容量を超える充電容量が前記二次電池の充電中に充電されたことを検出することにより、前記二次電池の微小短絡を判定するものである。
二次電池の内部抵抗値がその初期値から減少していることを検出することにより、前記二次電池の微小短絡を判定するものである。
FCC=Q/{(SOC2-SOC1)/100} ・・・(1)
に基づいて、二次電池200の満充電容量FCCを算出することができる。なお、SOC1やSOC2は温度補正されたものであれば、より正確な値が算出され得る。また、充電終了時点から所定時間経過時の電池電圧を用いることによって、充電終了時点よりも安定した電池電圧を演算に反映して演算結果の精度を高めることができる。
(Qrem+Qchg)/Qbat>K ・・・(2)
で表される関係式が成立する場合に(ステップ4)、二次電池200は微小短絡していると判定する(ステップ5)。K=1でもよいが、測定や演算の誤差を考慮し、微小短絡の誤判定を防ぐため、Kは1を超える正数(例えば、1.2以上1.5以下の値)に設定するとよい。関係式(2)が不成立の場合には、ステップ200は微小短絡していないとみなすことができるので、ステップ1に戻る。なお、演算処理部50は、充電途中段階での充電容量が二次電池に充電可能な充電容量を超えた時点で二次電池200が微小短絡していると判定してもよいが、二次電池200に対する充電が開始してから終了(停止)するまでに充電された充電容量が二次電池に充電可能な充電容量を超えていた場合に、二次電池200に微小短絡が発生したと判定してもよい。
Rc=(V1-V0)/(I1-I0) ・・・(3)
によって算出することができる。
20 電圧検出部
21 起動電圧検出部
30 電流検出部
31 起動電流検出部
40 ADC
50 演算処理部
60 メモリ
70 通信処理部
80 タイマ
100A 電池パック
200 二次電池
300 携帯機器
Claims (16)
- 二次電池の残容量を算出する残容量算出手段と、
前記二次電池の満充電容量を算出する満充電容量算出手段と、
前記二次電池の充電中に充電された充電容量と前記残容量算出手段によって該充電が開始する直前の算出タイミングで算出された残容量と前記満充電容量算出手段によって該充電が開始する前に算出された満充電容量とに基づいて前記二次電池が過充電されたことを検出することにより、前記二次電池の微小短絡を判断する微小短絡判断手段と、
前記微小短絡判断手段の判断結果に応じた信号を出力する出力手段とを備える、電池状態検知装置。 - 前記二次電池の充電中に充電された充電容量をQchg、前記残容量算出手段によって該充電が開始する直前の算出タイミングで算出された残容量をQrem、前記満充電容量算出手段によって該充電が開始する前に算出された満充電容量をQbat、1以上の正の係数をKとしたときに、
前記微小短絡判断手段は、
(Qrem+Qchg)/Qbat>K
で表される関係式が成立する場合に、前記二次電池は微小短絡していると判断する、請求項1に記載の電池状態検知装置。 - 前記出力手段は、前記二次電池の異常を通知するための信号を出力する、請求項1に記載の電池状態検知装置。
- 前記出力手段は、前記二次電池の充電を制限するための信号を出力する、請求項1に記載の電池状態検知装置。
- 二次電池の内部抵抗値を算出する内部抵抗値算出手段と、
前記内部抵抗値算出手段によって算出される内部抵抗値がその初期値から減少していることを検出することにより、前記二次電池の微小短絡を判断する微小短絡判断手段と、
前記微小短絡判断手段の判断結果に応じた信号を出力する出力手段とを備える、電池状態検知装置。 - 前記微小短絡判断手段は、前記内部抵抗値算出手段によって前記二次電池が充電される毎に算出される内部抵抗値に基づいて前記二次電池の内部抵抗値がその初期値から減少していることを検出することにより、前記二次電池の微小短絡を判断する、請求項5に記載の電池状態検知装置。
- 前記微小短絡判断手段は、前記内部抵抗値算出手段によって前回以前の充電サイクルで算出された内部抵抗値から今回の充電サイクルで算出された内部抵抗値を差し引いた差分が所定の判定値を超えることを検出することにより、前記二次電池の微小短絡を判断する、請求項5に記載の電池状態検知装置。
- 前記内部抵抗値算出手段は、前記二次電池の充電開始前後間での電圧差と電流差とに基づいて、前記二次電池の内部抵抗値を算出する、請求項5に記載の電池状態検知装置。
- 前記内部抵抗値算出手段は、
前記二次電池の所定値以上の充電電流値が検出される前の検出タイミングで検出された第1の電圧値と該所定値以上の充電電流値が検出された後の検出タイミングで検出された第2の電圧値との電圧差と、
該所定値以上の充電電流値が検出される前の検出タイミングで検出された第1の電流値と該所定値以上の充電電流値が検出された後の検出タイミングで検出された第2の電流値との電流差と、に基づいて、
前記内部抵抗値を算出する、請求項8に記載の電池状態検知装置。 - 前記出力手段は、前記二次電池の異常を通知するための信号を出力する、請求項5に記載の電池状態検知装置。
- 前記出力手段は、前記二次電池の充電を制限するための信号を出力する、請求項5に記載の電池状態検知装置。
- 請求項1に記載の電池状態検知装置と前記二次電池とを内蔵する電池パック。
- 請求項5に記載の電池状態検知装置と前記二次電池とを内蔵する電池パック。
- 二次電池に充電可能な充電容量を超える充電容量が前記二次電池の充電中に充電されたことを検出することにより、前記二次電池の微小短絡を判定する、電池状態検知方法。
- 二次電池の充電が開始される直前の残容量とその直前での満充電容量とを測定することによって、二次電池に充電可能な充電容量を特定する、請求項14に記載の電池状態検知方法。
- 二次電池の内部抵抗値がその初期値から減少していることを検出することにより、前記二次電池の微小短絡を判定する、電池状態検知方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200980134591.9A CN102144171B (zh) | 2008-09-11 | 2009-09-09 | 电池状态检测装置和方法、以及内置有该装置的电池包 |
US13/062,965 US8749204B2 (en) | 2008-09-11 | 2009-09-09 | Battery condition detector, battery pack including same, and battery condition detecting method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-233728 | 2008-09-11 | ||
JP2008233728A JP5815195B2 (ja) | 2008-09-11 | 2008-09-11 | 電池状態検知装置及びそれを内蔵する電池パック |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010029942A1 true WO2010029942A1 (ja) | 2010-03-18 |
Family
ID=42005195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/065745 WO2010029942A1 (ja) | 2008-09-11 | 2009-09-09 | 電池状態検知装置及びそれを内蔵する電池パック、並びに電池状態検知方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US8749204B2 (ja) |
JP (1) | JP5815195B2 (ja) |
CN (1) | CN102144171B (ja) |
WO (1) | WO2010029942A1 (ja) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012015094A (ja) * | 2010-06-29 | 2012-01-19 | O2 Micro Inc | バッテリを故障状態から保護するためのバッテリ管理システム |
EP2442399A1 (en) * | 2010-10-15 | 2012-04-18 | Makita Corporation | Battery pack |
EP2403048A3 (en) * | 2010-06-30 | 2013-05-22 | Sanyo Electric Co., Ltd. | Method of detecting battery internal resistance |
WO2017158706A1 (ja) * | 2016-03-14 | 2017-09-21 | 株式会社 東芝 | 蓄電池評価装置、蓄電システムおよび蓄電池評価方法 |
WO2019035338A1 (ja) * | 2017-08-14 | 2019-02-21 | 工機ホールディングス株式会社 | 電池パック及び電気機器 |
JP2020153983A (ja) * | 2019-03-18 | 2020-09-24 | 致茂電子股▲分▼有限公司Chroma Ate Inc. | 電池試験装置及びその方法 |
Families Citing this family (75)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8754611B2 (en) | 2008-04-11 | 2014-06-17 | Apple Inc. | Diffusion-limited adaptive battery charging |
US8255176B2 (en) | 2008-08-07 | 2012-08-28 | Research In Motion Limited | Systems and methods for monitoring deterioration of a rechargeable battery |
FR2952235B1 (fr) * | 2009-10-29 | 2015-01-16 | Commissariat Energie Atomique | Procede de charge ou de decharge d'une batterie pour determiner la fin de charge ou de decharge en fonction de mesures de courant et de temperature |
KR101232786B1 (ko) * | 2009-12-30 | 2013-02-13 | 주식회사 엘지화학 | 배터리 팩 관리 장치 및 방법 |
JP2011169831A (ja) * | 2010-02-19 | 2011-09-01 | Mitsumi Electric Co Ltd | 電池状態検知装置及び電池状態検知方法 |
US10422824B1 (en) * | 2010-02-19 | 2019-09-24 | Nikola Llc | System and method for efficient adaptive joint estimation of battery cell state-of-charge, resistance, and available energy |
JP5279762B2 (ja) * | 2010-05-30 | 2013-09-04 | レノボ・シンガポール・プライベート・リミテッド | パワー・オフ状態での消費電力の低減が可能な電子機器および消費電力の低減方法 |
JP2011257219A (ja) * | 2010-06-08 | 2011-12-22 | Nissan Motor Co Ltd | 二次電池の内部抵抗又は開放電圧を演算する演算装置 |
CA2861219C (en) | 2012-01-19 | 2019-03-26 | Nike Innovate C.V. | Power management in an activity monitoring device |
JP5971626B2 (ja) * | 2012-03-15 | 2016-08-17 | 株式会社日立製作所 | 電池システム |
US9018913B2 (en) | 2012-05-18 | 2015-04-28 | Caterpillar Inc. | System for determining battery impedance |
JP6001334B2 (ja) * | 2012-05-31 | 2016-10-05 | ルネサスエレクトロニクス株式会社 | 半導体装置、バッテリ状態監視モジュール及び車輌システム |
US9312712B2 (en) * | 2012-07-26 | 2016-04-12 | Samsung Sdi Co., Ltd. | Method and system for controlling charging parameters of a battery using a plurality of temperature ranges and counters and parameter sets |
US9081068B2 (en) | 2012-09-18 | 2015-07-14 | Apple Inc. | Method and apparatus for determining a capacity of a battery |
WO2014152650A1 (en) | 2013-03-14 | 2014-09-25 | California Institute Of Technology | Detecting electrical and electrochemical energy units abnormalities |
JP6085199B2 (ja) * | 2013-03-14 | 2017-02-22 | 日立マクセル株式会社 | ワイヤレス充電モジュール及びワイヤレス充電システム |
JP5744956B2 (ja) * | 2013-04-12 | 2015-07-08 | プライムアースEvエナジー株式会社 | 電池状態判定装置 |
TWI487927B (zh) * | 2013-05-17 | 2015-06-11 | Upi Semiconductor Corp | 電池的電量量測方法 |
EP3002597B1 (en) * | 2013-05-23 | 2020-09-16 | Vehicle Energy Japan Inc. | Battery control device |
US9696353B2 (en) * | 2013-07-29 | 2017-07-04 | Atmel Corporation | Measuring power consumption of circuit component operating in run mode |
US9470725B2 (en) | 2013-07-29 | 2016-10-18 | Atmel Corporation | Measuring power consumption of circuit component operating in ultra-low power mode |
WO2015056830A1 (ko) * | 2013-10-18 | 2015-04-23 | (주)마루엠씨에스 | 전동장치용 배터리의 전력모니터링 시스템 |
JP2015104225A (ja) * | 2013-11-25 | 2015-06-04 | ソニー株式会社 | 蓄電システムおよび二次電池の充電方法 |
JP6263771B2 (ja) * | 2013-12-26 | 2018-01-24 | 三菱自動車工業株式会社 | 車両の駆動用電池劣化判定装置 |
WO2015157892A1 (en) * | 2014-04-14 | 2015-10-22 | Nokia Technologies Oy | Method and apparatus for powering mobile device |
US9869723B2 (en) * | 2014-05-22 | 2018-01-16 | Mediatek Inc. | Power management scheme for separately and accurately measuring battery information of each of multiple batteries |
CN104833922B (zh) * | 2014-12-01 | 2017-12-08 | 北汽福田汽车股份有限公司 | 电池充放电电流限值的计算方法和装置 |
JP6414460B2 (ja) * | 2014-12-18 | 2018-10-31 | 株式会社デンソー | バッテリの劣化状態判定装置及び劣化状態判定方法 |
KR102368304B1 (ko) * | 2015-01-27 | 2022-02-28 | 삼성에스디아이 주식회사 | 배터리 팩, 이의 제어 방법 및 이를 구비한 전동 장치의 구동 시스템 |
KR20160095848A (ko) * | 2015-02-04 | 2016-08-12 | 삼성에스디아이 주식회사 | 배터리 팩 및 그 구동 방법 |
CN104767260B (zh) * | 2015-03-30 | 2017-04-05 | 华为技术有限公司 | 充电器、终端设备和充电*** |
US9423465B1 (en) * | 2015-06-30 | 2016-08-23 | Proterra Inc. | State of charge determination |
EP4083640A1 (en) * | 2015-10-01 | 2022-11-02 | California Institute of Technology | Systems and methods for monitoring characteristics of energy units |
JP6649834B2 (ja) * | 2016-03-31 | 2020-02-19 | 株式会社マキタ | 電動工具用バッテリパックの検査装置 |
US10189118B2 (en) * | 2016-06-06 | 2019-01-29 | GM Global Technology Operations LLC | Method and apparatus for evaluating an ultrasonic weld junction |
CN107870301B (zh) * | 2016-09-27 | 2020-09-04 | 华为技术有限公司 | 一种电池微短路的检测方法及装置 |
DE102016220262A1 (de) * | 2016-10-17 | 2018-04-19 | Robert Bosch Gmbh | Elektromechanischer Adapter, Energiespeichersystem sowie Verfahren zum Betreiben eines Energiespeichersystems |
JP6928228B2 (ja) * | 2016-11-25 | 2021-09-01 | ミツミ電機株式会社 | 電池監視回路 |
KR102196270B1 (ko) * | 2016-12-12 | 2020-12-29 | 주식회사 엘지화학 | 쇼트 감지방법 및 장치 |
KR101807761B1 (ko) | 2016-12-21 | 2017-12-13 | 이성훈 | 배터리 충전 감시 장치 |
KR102414226B1 (ko) * | 2017-03-10 | 2022-06-29 | 삼성전자주식회사 | 배터리 누설 상태에 기반한 제어 방법 및 전자 장치 |
CN110476318B (zh) * | 2017-04-07 | 2024-05-03 | 株式会社村田制作所 | 电池组充放电控制装置 |
US10788536B2 (en) * | 2017-05-11 | 2020-09-29 | Texas Instruments Incorporated | System and apparatus for battery internal short current detection under arbitrary load conditions |
EP3683913B1 (en) * | 2017-11-22 | 2023-02-22 | GS Yuasa International Ltd. | Restart determination device, internal-short determination device, restart determination method, and computer program |
EP3719917B1 (en) * | 2017-12-27 | 2022-04-13 | Furukawa Electric Co., Ltd. | Chargeable battery abnormality detection apparatus and chargeable battery abnormality detection method |
WO2020012296A1 (ja) | 2018-07-10 | 2020-01-16 | 株式会社半導体エネルギー研究所 | 半導体装置 |
WO2020012284A1 (ja) | 2018-07-10 | 2020-01-16 | 株式会社半導体エネルギー研究所 | 二次電池の保護回路及び二次電池の異常検知システム |
KR102238559B1 (ko) * | 2018-08-13 | 2021-04-09 | 삼성에스디아이 주식회사 | 배터리 제어 장치 및 배터리의 내부단락 검출 방법 |
CN109239615A (zh) * | 2018-09-12 | 2019-01-18 | 中兴高能技术有限责任公司 | 一种电池检测方法、装置、设备及存储介质 |
KR20210080425A (ko) | 2018-10-25 | 2021-06-30 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 축전 장치 및 축전 장치의 동작 방법 |
WO2020084386A1 (ja) | 2018-10-25 | 2020-04-30 | 株式会社半導体エネルギー研究所 | 二次電池の充電制御回路及び異常検知システム |
US11973198B2 (en) | 2018-11-22 | 2024-04-30 | Semiconductor Energy Laboratory Co., Ltd. | Device detecting abnormality of secondary battery and semiconductor device |
WO2020104892A1 (ja) | 2018-11-22 | 2020-05-28 | 株式会社半導体エネルギー研究所 | 半導体装置及び充電制御システム |
KR20210104682A (ko) | 2018-12-19 | 2021-08-25 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 히스테리시스 콤퍼레이터, 반도체 장치, 및 축전 장치 |
JP7463298B2 (ja) | 2019-01-24 | 2024-04-08 | 株式会社半導体エネルギー研究所 | 半導体装置及び半導体装置の動作方法 |
JP7244746B2 (ja) * | 2019-02-22 | 2023-03-23 | ミツミ電機株式会社 | 電子機器及びその状態判定方法 |
US20220131392A1 (en) * | 2019-02-25 | 2022-04-28 | Semiconductor Energy Laboratory Co., Ltd. | Protection circuit for secondary battery and abnormality detection system of secondary battery |
JP7116701B2 (ja) * | 2019-03-27 | 2022-08-10 | エスペック株式会社 | 充放電試験装置、制御プログラム及び充放電試験方法 |
EP3722821A1 (en) * | 2019-04-08 | 2020-10-14 | Dongguan NVT Technology Co., Ltd. | Methods, apparatuses, and storage media for calculating short-circuit current of battery |
JP7336264B2 (ja) * | 2019-05-29 | 2023-08-31 | 株式会社マキタ | バッテリパック |
US11498446B2 (en) * | 2020-01-06 | 2022-11-15 | Ford Global Technologies, Llc | Plug-in charge current management for battery model-based online learning |
US11181586B2 (en) | 2020-01-15 | 2021-11-23 | Medtronic, Inc. | Model-based capacity and resistance correction for rechargeable battery fuel gauging |
KR20210099504A (ko) * | 2020-02-04 | 2021-08-12 | 삼성전자주식회사 | 배터리 시스템에서 배터리의 작동 상태를 검출하는 방법 및 시스템 |
JPWO2021165780A1 (ja) | 2020-02-21 | 2021-08-26 | ||
CN115362590A (zh) | 2020-03-27 | 2022-11-18 | 株式会社半导体能源研究所 | 蓄电装置及电子设备 |
JP7244456B2 (ja) * | 2020-04-28 | 2023-03-22 | プライムアースEvエナジー株式会社 | 二次電池の状態判定方法及び二次電池の状態判定装置 |
CN111665450B (zh) * | 2020-05-26 | 2022-11-08 | 上海电享信息科技有限公司 | 动力电池内阻计算方法 |
WO2022004185A1 (ja) * | 2020-06-29 | 2022-01-06 | 株式会社村田製作所 | 電源装置および電池の不具合検出方法 |
JPWO2022112894A1 (ja) | 2020-11-27 | 2022-06-02 | ||
CN112924873A (zh) * | 2021-02-04 | 2021-06-08 | 上海玫克生储能科技有限公司 | 电池包微短路的在线诊断方法及*** |
US11967851B2 (en) * | 2021-02-25 | 2024-04-23 | GM Global Technology Operations LLC | Electrified powertrain with method for determining battery limits based on cell factors |
US20240170993A1 (en) | 2021-03-05 | 2024-05-23 | Semiconductor Energy Laboratory Co., Ltd. | Method for charging secondary battery |
CN114374003B (zh) * | 2021-12-13 | 2024-04-19 | 安徽力普拉斯电源技术有限公司 | 一种识别两轮车用深循环电池内化成充电微短路的方法 |
WO2023188959A1 (ja) * | 2022-03-29 | 2023-10-05 | パナソニックエナジー株式会社 | 電池パック |
CN115774200A (zh) * | 2022-12-09 | 2023-03-10 | 国联汽车动力电池研究院有限责任公司 | 一种锂离子电池串联模组微/内短路检测方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11135156A (ja) * | 1997-10-29 | 1999-05-21 | Shin Kobe Electric Mach Co Ltd | 二次電池の充放電電流検出方法及び装置 |
JP2001086656A (ja) * | 1999-07-09 | 2001-03-30 | Fujitsu Ltd | バッテリ監視装置 |
JP2002313435A (ja) * | 2001-04-18 | 2002-10-25 | Matsushita Electric Ind Co Ltd | 電池の検査方法 |
JP2006258797A (ja) * | 2005-02-18 | 2006-09-28 | Matsushita Electric Ind Co Ltd | 二次電池の内部短絡検出装置、二次電池の内部短絡検出方法、二次電池の電池パック及び電子機器 |
Family Cites Families (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6022571B2 (ja) * | 1979-12-05 | 1985-06-03 | 株式会社日立製作所 | 地絡保護方式 |
JPS6447232A (en) * | 1987-08-18 | 1989-02-21 | Toshiba Corp | Recharging circuit |
US5068509A (en) | 1990-01-11 | 1991-11-26 | Universal Instruments Corporation | High frequency thermode driven device employing one-turn-secondary transformers |
US5530336A (en) * | 1992-09-17 | 1996-06-25 | Sony Corporation | Battery protection circuit |
JPH07169510A (ja) * | 1993-12-16 | 1995-07-04 | Honda Motor Co Ltd | Ni−MHバッテリの残容量検出装置 |
JPH0984277A (ja) * | 1995-09-18 | 1997-03-28 | Nissan Motor Co Ltd | 電池の充電制御方法および装置 |
JP3217007B2 (ja) * | 1997-02-24 | 2001-10-09 | 埼玉日本電気株式会社 | セキュリティ機能付き携帯電話装置 |
JP4580132B2 (ja) | 1999-09-01 | 2010-11-10 | 富士通フロンテック株式会社 | 電池管理回路 |
JP3539326B2 (ja) * | 1999-12-27 | 2004-07-07 | 日本電気株式会社 | 携帯機器の充電システム |
TW535308B (en) * | 2000-05-23 | 2003-06-01 | Canon Kk | Detecting method for detecting internal state of a rechargeable battery, detecting device for practicing said detecting method, and instrument provided with said |
US6501248B2 (en) * | 2000-09-28 | 2002-12-31 | Ricoh Company, Ltd. | Charge/discharge protection apparatus having a charge-state overcurrent detector, and battery pack including the same |
JP4887581B2 (ja) | 2001-07-26 | 2012-02-29 | パナソニック株式会社 | 電池の検査方法および検査装置 |
JP3839761B2 (ja) * | 2001-09-14 | 2006-11-01 | 松下電器産業株式会社 | バッテリ制御装置 |
JP3824984B2 (ja) * | 2002-09-06 | 2006-09-20 | 三菱電機株式会社 | 排気ガスセンサの温度制御装置 |
JP4016881B2 (ja) | 2002-11-27 | 2007-12-05 | 富士電機デバイステクノロジー株式会社 | 電池の残量計測装置 |
JP4134986B2 (ja) * | 2002-12-05 | 2008-08-20 | 松下電器産業株式会社 | 電池パックとその充放電方法 |
JP4415074B2 (ja) * | 2003-03-10 | 2010-02-17 | 新神戸電機株式会社 | 充放電制御システム |
US7482784B2 (en) * | 2003-07-15 | 2009-01-27 | Panasonic Corporation | Degradation judgment circuit for secondary battery |
US20050040792A1 (en) * | 2003-08-18 | 2005-02-24 | Rajendran Nair | Method & apparatus for charging, discharging and protection of electronic battery cells |
JP4052284B2 (ja) * | 2004-05-31 | 2008-02-27 | 松下電工株式会社 | 充電器及びそれを備えた充電装置 |
JP4137891B2 (ja) * | 2005-01-26 | 2008-08-20 | 株式会社日立超エル・エス・アイ・システムズ | リチウムイオン二次電池監視半導体装置及びそのテスト方法 |
JP2006340450A (ja) * | 2005-05-31 | 2006-12-14 | Mitsumi Electric Co Ltd | 電池保護回路 |
EP1933158B1 (en) * | 2005-09-16 | 2018-04-25 | The Furukawa Electric Co., Ltd. | Secondary cell degradation judgment method, secondary cell degradation judgment device, and power supply system |
JP3874366B1 (ja) * | 2006-03-16 | 2007-01-31 | 株式会社パワーシステム | キャパシタ蓄電装置 |
JP4805192B2 (ja) * | 2006-06-29 | 2011-11-02 | 日置電機株式会社 | 電池の内部抵抗測定装置 |
JP4724070B2 (ja) * | 2006-08-09 | 2011-07-13 | 本田技研工業株式会社 | 電動機の制御装置 |
JP4782663B2 (ja) * | 2006-11-29 | 2011-09-28 | パナソニック株式会社 | 充電システム、充電装置、及び電池パック |
JP4262753B2 (ja) * | 2007-01-04 | 2009-05-13 | 日本航空電子工業株式会社 | 短絡検出回路、rdコンバータ及びデジタル角度検出装置 |
JP4995643B2 (ja) * | 2007-06-11 | 2012-08-08 | パナソニック株式会社 | 非水系電解質二次電池の内部短絡検知方法および装置 |
-
2008
- 2008-09-11 JP JP2008233728A patent/JP5815195B2/ja active Active
-
2009
- 2009-09-09 CN CN200980134591.9A patent/CN102144171B/zh active Active
- 2009-09-09 WO PCT/JP2009/065745 patent/WO2010029942A1/ja active Application Filing
- 2009-09-09 US US13/062,965 patent/US8749204B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11135156A (ja) * | 1997-10-29 | 1999-05-21 | Shin Kobe Electric Mach Co Ltd | 二次電池の充放電電流検出方法及び装置 |
JP2001086656A (ja) * | 1999-07-09 | 2001-03-30 | Fujitsu Ltd | バッテリ監視装置 |
JP2002313435A (ja) * | 2001-04-18 | 2002-10-25 | Matsushita Electric Ind Co Ltd | 電池の検査方法 |
JP2006258797A (ja) * | 2005-02-18 | 2006-09-28 | Matsushita Electric Ind Co Ltd | 二次電池の内部短絡検出装置、二次電池の内部短絡検出方法、二次電池の電池パック及び電子機器 |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012015094A (ja) * | 2010-06-29 | 2012-01-19 | O2 Micro Inc | バッテリを故障状態から保護するためのバッテリ管理システム |
EP2403048A3 (en) * | 2010-06-30 | 2013-05-22 | Sanyo Electric Co., Ltd. | Method of detecting battery internal resistance |
EP2442399A1 (en) * | 2010-10-15 | 2012-04-18 | Makita Corporation | Battery pack |
CN102457085A (zh) * | 2010-10-15 | 2012-05-16 | 株式会社牧田 | 工具用电池 |
CN102457085B (zh) * | 2010-10-15 | 2014-06-04 | 株式会社牧田 | 工具用电池 |
US8823322B2 (en) | 2010-10-15 | 2014-09-02 | Makita Corporation | Battery pack |
WO2017158706A1 (ja) * | 2016-03-14 | 2017-09-21 | 株式会社 東芝 | 蓄電池評価装置、蓄電システムおよび蓄電池評価方法 |
JPWO2017158706A1 (ja) * | 2016-03-14 | 2018-06-21 | 株式会社東芝 | 蓄電池評価装置、蓄電システムおよび蓄電池評価方法 |
US10845421B2 (en) | 2016-03-14 | 2020-11-24 | Kabushiki Kaisha Toshiba | Storage battery evaluation device, energy storage system, and storage battery evaluation method |
WO2019035338A1 (ja) * | 2017-08-14 | 2019-02-21 | 工機ホールディングス株式会社 | 電池パック及び電気機器 |
JPWO2019035338A1 (ja) * | 2017-08-14 | 2020-08-20 | 工機ホールディングス株式会社 | 電池パック及び電気機器 |
JP7103360B2 (ja) | 2017-08-14 | 2022-07-20 | 工機ホールディングス株式会社 | 電池パック及び電気機器 |
US11637433B2 (en) | 2017-08-14 | 2023-04-25 | Koki Holdings Co., Ltd. | Battery pack and electrical apparatus |
JP2020153983A (ja) * | 2019-03-18 | 2020-09-24 | 致茂電子股▲分▼有限公司Chroma Ate Inc. | 電池試験装置及びその方法 |
JP7053703B2 (ja) | 2019-03-18 | 2022-04-12 | 致茂電子股▲分▼有限公司 | 電池試験装置及びその方法 |
Also Published As
Publication number | Publication date |
---|---|
JP2010066161A (ja) | 2010-03-25 |
JP5815195B2 (ja) | 2015-11-17 |
CN102144171A (zh) | 2011-08-03 |
CN102144171B (zh) | 2015-04-08 |
US8749204B2 (en) | 2014-06-10 |
US20110187329A1 (en) | 2011-08-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5815195B2 (ja) | 電池状態検知装置及びそれを内蔵する電池パック | |
JP5368038B2 (ja) | 電池状態検知装置及びそれを内蔵する電池パック | |
WO2010004985A1 (ja) | 電池状態検知装置 | |
JP5561916B2 (ja) | 電池状態監視装置 | |
KR101536220B1 (ko) | 전지 팩, 전지 팩을 사용하는 휴대 기기, 전지 팩에서의 내부 쇼트 검출 방법, 내부 쇼트 검출 프로그램을 기록한 컴퓨터 판독가능 매체 | |
WO2011048471A1 (ja) | 電力供給装置 | |
JP2010085243A (ja) | バックアップ電池の満充電容量検出方法 | |
US8198863B1 (en) | Model-based battery fuel gauges and methods | |
TWI639015B (zh) | Residual battery detection circuit, electronic device using the same, automobile and charging state detection method | |
JP2011043513A (ja) | 電池状態検知方法及び電池状態検知装置、並びに演算式導出方法 | |
JP2009031220A (ja) | 電池状態検知方法及び電池状態検知装置 | |
JP2013083612A (ja) | 電池状態計測方法及び電池状態計測装置 | |
JPH11329512A (ja) | 二次電池の容量劣化判断方法およびその判断装置 | |
WO2007142195A1 (ja) | 電池パックの異常判定方法および電池パック | |
WO2011102180A1 (ja) | 電池状態検知装置及び電池状態検知方法 | |
JP2012253975A (ja) | アルカリ蓄電池の充放電制御方法および充放電システム | |
JP2013156202A (ja) | 二次電池の残容量算出方法及びパック電池 | |
JP2009064682A (ja) | 電池劣化判定装置及びそれを備えたリチウムイオン電池パック | |
JP4764971B2 (ja) | 電池の残量計測装置 | |
JP4016881B2 (ja) | 電池の残量計測装置 | |
JP7231346B2 (ja) | 蓄電システムの寿命判定方法、及び蓄電システム | |
JP5601214B2 (ja) | 電池容量補正装置及び電池容量補正方法 | |
JP2011145986A (ja) | 電池式警報器 | |
TWI695988B (zh) | 電池之殘量檢測電路、使用其之電子機器、電池殘量之檢測方法 | |
JP4868081B2 (ja) | 電池状態検知方法及び電池状態検知装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200980134591.9 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09813088 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13062965 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 09813088 Country of ref document: EP Kind code of ref document: A1 |