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WO2022108164A1 - Dispositif de charge rapide et procédé de protection contre la surchauffe à l'aide d'une résistance interne de batterie - Google Patents

Dispositif de charge rapide et procédé de protection contre la surchauffe à l'aide d'une résistance interne de batterie Download PDF

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Publication number
WO2022108164A1
WO2022108164A1 PCT/KR2021/015281 KR2021015281W WO2022108164A1 WO 2022108164 A1 WO2022108164 A1 WO 2022108164A1 KR 2021015281 W KR2021015281 W KR 2021015281W WO 2022108164 A1 WO2022108164 A1 WO 2022108164A1
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Prior art keywords
battery
charging
current
internal resistance
voltage
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English (en)
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Hyun Chan Kang
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Alphatronics Co Ltd
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Alphatronics Co Ltd
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    • 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
    • H01M10/44—Methods for charging or discharging
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
    • G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for 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]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. 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
    • G01R31/36—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
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • 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
    • H01M10/42—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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00038—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange using passive battery identification means, e.g. resistors or capacitors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00309—Overheat or overtemperature protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00711—Regulation of charging or discharging current or voltage with introduction of pulses during the charging process
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
    • H02J7/04—Regulation of charging current or voltage

Definitions

  • the present disclosure relates to a fast charging device and method with overheat protection, and more particularly, to a technology for preventing a battery from overheating when rapidly charging the battery.
  • Lithium-ion batteries are generally charged in a constant current constant voltage (CCCV) method.
  • CCCV constant current constant voltage
  • FIG. 1 at the beginning of battery charging, the battery is charged in a constant current charging mode, and when the battery voltage reaches a reference voltage, the battery is charged in a constant voltage charging mode. That is, in an initial stage of charging, in order to prevent overcurrent from being applied to the battery, a charging device operates in the constant current charging mode for a predetermined time period T1 to charge the battery with a constant current charging signal I1. In addition, when the battery voltage rises and reaches the reference voltage, the charging device operates in the constant voltage charging mode to prevent the battery from being overcharged in the time period T2 from that point to the charging completion time to charge the battery with a constant voltage charging signal V2.
  • the present applicant has proposed a method of applying a pulse-type charging current that repeats a charging period and a non-charging period to a battery, and controlling the pulse width of the charging current according to the temperature of the battery (Korean Patent Registration No. 10-1738846).
  • the pulse width in the charging period of the pulse-type charging current is decreased when the temperature of the battery increases, and the pulse width in the charging period of the pulse-type charging current is increased when the temperature of the battery decreases, so that it is possible to minimize the increase of battery temperature during the battery charging process, and stably charge the battery.
  • the battery temperature is controlled based on the battery temperature measured after the battery temperature increases. Accordingly, when the temperature of the battery rapidly rises, there is a problem in that the battery temperature control cannot keep up with the temperature rise of the battery.
  • Patent Document 1 Korea Patent Publication No. 10-1738846
  • the present disclosure has been proposed to solve the above problems, and an object of the present disclosure is to provide a fast charging device with a battery overheat prevention capable of effectively suppressing the temperature rise of the battery by predicting the temperature rise of the battery in advance.
  • embodiments of the present disclosure may provide a fast charging device with protecting overheat using a battery internal resistance including a voltage measuring unit for measuring a battery voltage, a current measuring unit for measuring a battery current, an internal resistance calculator configured to calculate an internal resistance of a battery based on the battery voltage measured by the voltage measuring unit and the battery current measured by the current measuring unit, a charging controller configured to determine whether the battery voltage measured by the voltage measuring unit is equal to or greater than a predetermined reference voltage, and determine a battery charging mode according to the determination result, and a battery charging unit for applying a charging current to the battery in at least one of a constant current charging mode or a constant voltage charging mode according to a determination of the battery charging mode of the charging controller.
  • the charging controller may control an increase or a decrease of the charging current based on the internal resistance of the battery.
  • the fast charging device with protecting overheat using a battery internal resistance may further include a temperature measuring unit for measuring a battery temperature, and the charging controller may control an increase or a decrease of the charging current based on the internal resistance of the battery and the battery temperature.
  • embodiments of the present disclosure may provide a fast charging method with protecting overheat using a battery internal resistance including measuring a battery voltage, measuring a battery current, calculating an internal resistance of a battery based on the battery voltage and the battery current, and charging the battery in a constant current charging mode when the battery voltage is less than a predetermined reference voltage, and charging the battery in a constant voltage charging mode when the battery voltage is greater than or equal to the reference voltage.
  • a charging current applied to the battery may be increased or decreased based on the internal resistance of the battery.
  • the fast charging method with protecting overheat using a battery internal resistance may further include measuring a battery temperature, and the charging current may be increased or decreased based on the internal resistance of the battery and the battery temperature.
  • the fast charging device with protecting overheat using the battery internal resistance of the present disclosure may expect that the battery temperature will rise when the internal resistance of the battery increases, and may control the increase or decrease of the battery charging current based on the internal resistance of the battery in advance before the temperature of the battery actually rises. Accordingly, it is possible to effectively suppress the temperature rise of the battery even during rapid charging of the battery and to stably charge the battery.
  • FIG. 1 is a diagram for explaining a charging operation in a constant current charging mode and a constant voltage charging mode of a battery charging device.
  • FIG. 2 illustrates a configuration of the fast charging device with protecting overheat using the battery internal resistance of the present disclosure.
  • FIG. 3 is a diagram for explaining a waveform of a pulse-type charging current applied to the battery in the present disclosure.
  • FIG. 4 is a diagram for explaining the increase or decrease of the pulse magnitude of the charging current according to the change in the battery internal resistance and the battery temperature in the present disclosure.
  • FIG. 5 is a diagram for explaining the increase or decrease of the pulse width of the charging current according to the change in the battery internal resistance and the battery temperature in the present disclosure.
  • FIG. 6 is a flowchart for explaining the operation of the fast charging device with protecting overheat using the internal resistance of the battery of the present disclosure.
  • FIG. 2 illustrates a configuration of the fast charging device 100 with protecting overheat using the battery internal resistance of the present disclosure.
  • the fast charging device 100 with protecting overheat using the battery internal resistance may include a voltage measuring unit 110, a current measuring unit 120, an internal resistance calculator 130, a temperature measuring unit 140, a battery charging unit 150, and a charging controller 160.
  • the voltage measuring unit 110 measures a voltage across a battery 200, that is, the battery voltage.
  • the voltage measuring unit 110 may measure the battery voltage at a preset period while a charging signal is applied to the battery 200.
  • the voltage measurement by the voltage measuring unit 110 may be performed by receiving a voltage measurement request signal from the charging controller 160.
  • the voltage measuring unit 110 may transmit the measured battery voltage to the internal resistance calculator 130.
  • the internal resistance calculator 130 may calculate an internal resistance of the battery using the received battery voltage and a battery current measured by the current measuring unit 120 to be described later.
  • the voltage measuring unit 110 may transmit the measured battery voltage to the charging controller 160.
  • the charging controller 160 may determine which mode of a constant current charging mode and a constant voltage charging mode to operate the fast charging device 100 by using the received battery voltage.
  • FIG. 3 is a diagram for explaining a waveform of a pulse-type charging current applied to the battery 200 from the battery charging unit 150.
  • the charging current applied to the battery 200 may be a pulse waveform consisting of a charging period (tens of ms) in which current is applied to the battery 200 and a non-charging period (several ms) in which current is not applied.
  • the charging current applied to the battery 200 may be a pulse waveform consisting of a charging period (tens of ms) in which the charging current is applied to the battery 200 and a small-charging period (several ms) in which a small amount of charging current is applied.
  • the charging current is not applied to the battery 200 in the non-charging period of the pulse-type charging current, however, in the small-charging period of the pulse-type charging current, a small amount of charging current compared to the charging current applied to the battery 200 in the charging period may be applied to the battery 200.
  • the application of a small amount of charging current to the small-charging period is only to measure the battery voltage used for calculating internal resistance, which will be described later.
  • the small amount of charging current in the small-charging period may be about 1/10 of the charging current in the charging period.
  • the voltage measuring unit 110 measures a voltage V on across the battery 200 in the charging period in which the charging current is applied to the battery 200, and, also measures the voltage V off across the battery in the non-charging period in which no charging current is applied to the battery 200.
  • the voltage measuring unit 110 transmits the measured battery voltages V on and V off to the internal resistance calculator 130.
  • a period or cycle for measuring the battery voltage by the voltage measuring unit 110 may be stored in advance in the charging controller 160.
  • the voltage measuring unit 110 measures the voltage V high across the battery 200 in the charging period in which the charging current is applied to the battery 200, and also measures the voltage V low applied to both ends of the battery in the small-charging period in which a small amount of charging current is applied to the battery 200.
  • the voltage measuring unit 110 transmits the measured battery voltages V high and V low to the internal resistance calculator 130.
  • the voltage measuring unit 110 may transmit the voltage V off measured in the non-charging period to the charging controller 160.
  • the charging controller 160 determines whether to operate the fast charging device 100 in a constant current charging mode or a constant voltage charging mode by comparing V off with a reference voltage.
  • the current measuring unit 120 measures a current flowing through the battery 200, that is, the battery current.
  • the current measuring unit 120 may measure the current flowing through the battery 200 at a preset period while the charging current is applied to the battery 200.
  • the current measurement by the current measuring unit 120 may be performed by receiving a current measurement request signal from the charging controller 160.
  • the current measuring unit 120 may measure a current I flowing through the battery in the charging period. In addition, if the battery charging current signal consists of a charging period and a small-charging period, the current measuring unit 120 may measure the current I high flowing through the battery in the charging period and measure the current I low flowing through the battery in the small-charging period. The current measuring unit 120 transmits the measured battery currents I, I high and I low to the internal resistance calculator 130.
  • the internal resistance calculator 130 may calculate an initial internal resistance of the battery before charging the battery 200.
  • the initial internal resistance of the battery may be calculated in the same way as the battery internal resistance calculation method, which will be described later. That is, the initial internal resistance of the battery may be calculated using the battery voltage measured by the voltage measuring unit 110 and the battery current measured by the current measuring unit 120.
  • the initial internal resistance of the battery calculated by the internal resistance calculator 130 is transmitted to and stored in the charging controller 160.
  • the internal resistance calculator 130 may calculate the internal resistance R int of the battery 200, while the battery 200 is being charged, by using the battery voltage measured by the voltage measuring unit 110 and the battery current measured by the current measuring unit 120.
  • the internal resistance of the battery can be calculated through Equation (1).
  • V on is the voltage across the battery 200 in the charging period in which the charging current is applied to the battery 200
  • V off is a voltage across both ends of the battery 200 in the non-charging period in which the charging current is not applied to the battery 200
  • I is a current flowing through the battery when a charging current is applied to the battery 200 in the charging period.
  • the internal resistance of the battery can be calculated through Equation (2).
  • V high is the battery voltage measured in the charging period
  • V low is the battery voltage measured in the small-charging period
  • I high is the battery current measured in the charging period
  • I low is the battery current measured in the small-charging period
  • the internal resistance calculator 130 transmits the internal resistance calculated through Equation (1) or (2) to the charging controller 160.
  • the temperature measuring unit 140 measures the temperature of the battery 200.
  • the temperature measuring unit 140 measures the temperature of the battery 200 at a preset period while the charging signal is applied to the battery.
  • the temperature measuring unit 140 may use various temperature sensors such as a thermistor to measure the temperature of the battery 200.
  • the temperature measuring unit 140 transmits the measured battery temperature to the charging controller 160.
  • the charging controller 160 controls a battery charging process in a constant current-constant voltage (CCCV) method.
  • CCCV constant current-constant voltage
  • the charging controller 160 controls the battery charging unit 150 to charge the battery 200 by operating the battery charging unit 150 in a constant current charging mode in the initial battery charging stage T1.
  • the charging controller 160 receives the battery voltage V off from the voltage measuring unit 110 according to a preset period and compares with a preset reference voltage.
  • the charging controller 160 controls the battery charging unit 150 to charge the battery by operating the battery charging unit 150 in a constant voltage charging mode if the battery voltage V off is equal to or greater than the reference voltage.
  • the charging controller 160 may determine whether the battery voltage V off is equal to or greater than the reference voltage and transmit a battery charging mode selection signal to the battery charging unit 150 according to the determination result.
  • the charging controller 160 controls the charging current applied to the battery based on the internal resistance of the battery and the battery temperature in order to suppress the increase in the battery temperature while charging the battery.
  • the temperature rise or temperature increase of the battery 200 occurs by converting power consumed in the battery into heat.
  • the internal resistance of the battery R int,1 at the time when the battery temperature is expected to rise may also be derived from the power consumption calculation formula.
  • the battery power consumption P batt is calculated at the specific time by using the internal resistance of the battery periodically calculated by the internal resistance calculator 130.
  • This battery power consumption P batt is periodically compared with the battery power consumption P 1 expected to increase in battery temperature, and in the case that P batt becomes equal to P 1 as a result of the comparison, there may be determined that the temperature of the battery during charging starts to rise. Therefore, by adjusting P batt so that the battery power consumption P batt is maintained lower than P1, it is possible to prevent the temperature of the battery from rising.
  • the battery power consumption Pbatt may be adjusted by increasing or decreasing the charging current I applied to the battery.
  • whether the battery power consumption P batt gradually increases in the charging process and reaches the battery power consumption P 1 expected to increase the battery temperature may be checked by determining whether the periodically calculated battery internal resistance has reached the battery internal resistance R int,1 , which is expected to increase the battery temperature, or by determining whether a difference between the periodically calculated internal resistance of the battery and the initial internal resistance of the battery reaches a predetermined level.
  • a battery temperature range in which the battery is stably charged there may be preset a battery temperature range in which the battery is stably charged. That is, in order to control the battery temperature, there may be set in advance the battery temperature range in which charging is stably performed without overheating during the battery charging process and the corresponding battery power consumption P batt range. In this case, the battery power consumption P batt may be adjusted so that the battery power consumption Pbatt is maintained within this range. In this case, the control of the battery power consumption P batt may be performed by increasing or decreasing the charging current I applied to the battery.
  • a range of battery internal resistance corresponding to a range of battery power consumption P batt in which battery charging is stably performed there may be set in advance a range of battery internal resistance corresponding to a range of battery power consumption P batt in which battery charging is stably performed, and the battery power consumption P batt may be adjusted so that the battery internal resistance is maintained within this range.
  • the battery power consumption P batt may be adjusted so that the battery internal resistance is maintained within this range.
  • the charging controller 160 may calculate the power consumed in the battery while charging the battery using the initial internal resistance of the battery received from the internal resistance calculator 130, and through this, may predict a battery temperature rise that occurs while charging the battery.
  • the charging controller 160 may set the initial battery charging current based on the expected increase in the battery temperature.
  • the charging controller 160 may control the charging current applied to the battery 200 based on the internal resistance of the battery received from the internal resistance calculating unit 130 according to a preset period. It will be described the process of controlling the charging current applied to the battery 200 based on the internal resistance of the battery.
  • the charging controller 160 continuously detects a change in the internal resistance of the battery periodically transmitted from the internal resistance calculator 130 while the battery 200 is being charged. If it is determined that the internal resistance of the battery increases beyond the preset battery internal resistance range, the charging controller 160 reduces the charging current applied to the battery 200 through the battery charging unit 150. In addition, if it is determined that the internal resistance of the battery decreases below a preset battery internal resistance range, the charging controller 160 increases the charging current applied to the battery 200 through the battery charging unit 150.
  • the preset battery internal resistance range means a range of the battery internal resistance corresponding to a range of battery power consumption in a battery temperature range in which the battery is not overheated and is stably charged.
  • the charging controller 160 controls the charging current applied to the battery based on the increase and decrease of the internal resistance.
  • FIG. 4 illustrates a case in which the charging controller 160 changes the pulse magnitude of the charging current in order to control the charging current applied to the battery based on the increase and decrease of the internal resistance.
  • the charging controller 160 may change a pulse width of the charging current to control the charging current applied to the battery based on the increase and decrease of the internal resistance.
  • the charging controller 160 may control the pulse-type charging current to suppress a sudden increase in the battery temperature by using the battery temperature received from the temperature measuring unit 140. That is, the charging controller 160 periodically compares the battery temperature received from the temperature measuring unit 140 while the battery 200 is being charged with a temperature range in which the battery stably operates. As a result of the comparison, if the battery temperature is greater than the temperature range in which the battery stably operates, the charging controller may, as shown in FIG. 4, reduce the pulse magnitude of the pulse-type charging current applied to the battery 200 through the battery charging unit 150, that is, the pulse magnitude in the charging period.
  • the charging controller may increases the pulse magnitude of the pulse-type charging current applied to the battery 200 through the battery charging unit 150.
  • the charging controller 160 may implement the change in the charging current according to the increase and decrease of the battery temperature by changing the pulse width of the charging current as shown in FIG. 5. As described above, the charging controller 160 can effectively lower the battery temperature by reducing the charging current when the battery temperature is rapidly increased.
  • the battery charging unit 150 charges the battery 200 in the constant current charging mode or the constant voltage charging mode according to a battery charging mode selection signal received from the charging controller 160.
  • the battery charging unit 150 charges the battery 200 by applying a charging current to the battery 200 in the constant current charging mode. If the battery voltage becomes greater than or equal to the reference voltage through charging, the battery charging unit 150 changes to the constant voltage charging mode according to the battery charging mode selection signal of the charging controller 160 to charge the battery 200 with the constant voltage charging mode.
  • the battery charging unit 150 increases or decreases the pulse-type charging current applied to the battery according to a battery charging current control signal received from the charging controller 160.
  • FIG. 6 is a flowchart for explaining the operation of the fast charging device with protecting overheat using the internal resistance of the battery of the present disclosure.
  • the internal resistance calculator 130 measures an initial internal resistance of the battery before charging the battery 200 (S100).
  • the internal resistance calculator 130 transmits the measured initial internal resistance of the battery to the charging controller 160.
  • the charging controller 160 may calculate the power consumed by the battery while charging the battery by using the initial internal resistance of the battery, and expect the increase in the battery temperature expected to rise while the battery is being charged.
  • the charging controller 160 sets an initial battery charging current based on the expected increase in battery temperature (S101).
  • the battery 200 is charged by applying a pulse-type initial battery charging current to the battery 200.
  • the internal resistance calculator 130 continuously detects the internal resistance of the battery at a set period while the charging current is applied to the battery. That is, if the voltage measuring unit 110 and the current measuring unit 120 measure each battery voltage and the current flowing in the battery in the charging period and the non-charging period at a set period or cycle and transmit it to the internal resistance calculator 130.
  • the internal resistance calculator 130 continuously detects a change in the internal resistance of the battery by using the battery voltage and the battery current flowing through the battery (S102).
  • the internal resistance calculator 130 transmits the measured internal resistance of the battery to the charging controller 160.
  • the charging controller 160 compares the received internal resistance of the battery with a preset battery internal resistance range, and if the internal resistance of the battery increases above a preset battery internal resistance range (S103), the charging controller reduces the pulse-type charging current applied from the battery charging unit 150 to the battery 200 (S104). In addition, if the internal resistance of the battery decreases below the preset battery internal resistance range (S105), the charging controller increases the pulse-type charging current applied from the battery charging unit 150 to the battery 200 (S106).
  • the temperature measuring unit 140 measures the temperature of the battery 200 at a set period and transmits it to the charging controller 160.
  • the charging controller 160 periodically compares the battery temperature received from the temperature measuring unit 140 with a temperature range in which the battery stably operates. If the battery temperature rises above the temperature range in which the battery stably operates (S107), the charging controller reduces the pulse-type charging current applied from the battery charging unit 150 to the battery 200 (S108). Alternatively, if the temperature decreases below the temperature range in which the battery stably operates (S109), the charging controller increases the pulse-type charging current applied from the battery charging unit 150 to the battery 200 (S110).
  • the charging controller 160 compares the battery voltage in the non-charging period measured by the voltage measuring unit 110 with a reference voltage at a set period (S111). If the measured battery voltage is equal to or greater than the reference voltage, the battery charging mode is changed from a constant current charging mode (T1 period in FIG. 1) to the constant voltage charging mode to charge while reducing the constant current (T2 period in FIG. 1) (S112). In addition, if the measured battery voltage is less than the reference voltage, the constant current charging mode is maintained.
  • the charging controller 160 determines whether the battery 200 is fully charged based on the battery voltage (S132). If it is determined that charging of the battery 200 is complete, charging is terminated. If it is determined that the battery 200 is not fully charged, steps S102 to S112 are repeatedly performed.
  • the contents of this embodiment have been described based on the battery charged in the CCCV method.
  • the fast charging method with protecting overheat of the battery based on the battery internal resistance of the present embodiment may be applied to any rechargeable battery whose internal resistance changes as a charging current is applied.

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  • Secondary Cells (AREA)

Abstract

Le dispositif de charge rapide avec protection contre la surchauffe selon un mode de réalisation de la présente invention peut augmenter ou diminuer le courant de charge appliqué à la batterie sur la base d'une résistance interne de batterie calculée par une tension de batterie et un courant de batterie pendant la charge rapide de la batterie, ce qui permet d'éviter la surchauffe de la batterie lors de la charge de la batterie et de charger la batterie de manière stable.
PCT/KR2021/015281 2020-11-19 2021-10-28 Dispositif de charge rapide et procédé de protection contre la surchauffe à l'aide d'une résistance interne de batterie Ceased WO2022108164A1 (fr)

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KR1020200155490A KR20220068572A (ko) 2020-11-19 2020-11-19 배터리 내부저항을 이용한 과열 방지 급속 충전 장치 및 방법
KR10-2020-0155490 2020-11-19

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WO2022108164A1 true WO2022108164A1 (fr) 2022-05-27

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CN115954986A (zh) * 2023-02-08 2023-04-11 国光电器股份有限公司 一种电池过放充电优化装置、系统和方法
WO2025016507A1 (fr) * 2023-07-14 2025-01-23 Bayerische Motoren Werke Aktiengesellschaft Procédé de détermination d'une résistance interne d'un élément de batterie d'un dispositif de stockage d'énergie pour un véhicule automobile pouvant être entraîné électriquement, programme informatique et/ou support lisible par ordinateur, dispositif de traitement de données, véhicule automobile pouvant être entraîné électriquement, colonne de charge

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JP2012019679A (ja) * 2010-06-09 2012-01-26 Nissan Motor Co Ltd 充電制御システム
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KR20130057520A (ko) * 2011-11-24 2013-06-03 에스케이이노베이션 주식회사 배터리의 내부 저항 추정 장치 및 방법
KR101387429B1 (ko) * 2013-12-24 2014-04-21 주식회사 엘란기어스 정전류-정전압 방식을 이용한 배터리 급속 충전 장치
KR20190127535A (ko) * 2018-05-03 2019-11-13 페가트론 코포레이션 배터리 충전 시스템 및 배터리 충전 방법

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KR101738846B1 (ko) 2015-09-10 2017-05-23 주식회사 알파트로닉스 과열 상태 배터리 냉각 충전 장치 및 방법

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Publication number Priority date Publication date Assignee Title
JP2012019679A (ja) * 2010-06-09 2012-01-26 Nissan Motor Co Ltd 充電制御システム
US20130119939A1 (en) * 2011-11-15 2013-05-16 Minoru Yonezawa Charge/discharge scheduling system and charge/discharge scheduling method
KR20130057520A (ko) * 2011-11-24 2013-06-03 에스케이이노베이션 주식회사 배터리의 내부 저항 추정 장치 및 방법
KR101387429B1 (ko) * 2013-12-24 2014-04-21 주식회사 엘란기어스 정전류-정전압 방식을 이용한 배터리 급속 충전 장치
KR20190127535A (ko) * 2018-05-03 2019-11-13 페가트론 코포레이션 배터리 충전 시스템 및 배터리 충전 방법

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115954986A (zh) * 2023-02-08 2023-04-11 国光电器股份有限公司 一种电池过放充电优化装置、系统和方法
WO2025016507A1 (fr) * 2023-07-14 2025-01-23 Bayerische Motoren Werke Aktiengesellschaft Procédé de détermination d'une résistance interne d'un élément de batterie d'un dispositif de stockage d'énergie pour un véhicule automobile pouvant être entraîné électriquement, programme informatique et/ou support lisible par ordinateur, dispositif de traitement de données, véhicule automobile pouvant être entraîné électriquement, colonne de charge

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