WO2013008397A1 - Batterie d'accumulateurs, système de commande du chargement et procédé de chargement - Google Patents

Batterie d'accumulateurs, système de commande du chargement et procédé de chargement Download PDF

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Publication number
WO2013008397A1
WO2013008397A1 PCT/JP2012/004150 JP2012004150W WO2013008397A1 WO 2013008397 A1 WO2013008397 A1 WO 2013008397A1 JP 2012004150 W JP2012004150 W JP 2012004150W WO 2013008397 A1 WO2013008397 A1 WO 2013008397A1
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WO
WIPO (PCT)
Prior art keywords
charging
voltage
battery cell
temperature
full charge
Prior art date
Application number
PCT/JP2012/004150
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English (en)
Japanese (ja)
Inventor
忠大 吉田
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Ｎｅｃエナジーデバイス株式会社
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Publication of WO2013008397A1 publication Critical patent/WO2013008397A1/fr

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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
    • 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
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • 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
    • 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
    • H02J7/007—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
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • 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
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
    • 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
    • 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
    • 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
    • H02J7/00716—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 in response to integrated charge or discharge current
    • 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 pack, a charging control system, and a charging method.
  • a constant current and constant voltage charging method is used as a charging method for the lithium ion secondary battery.
  • charging is performed with a constant current until the battery voltage reaches a specific voltage (hereinafter, referred to as a constant current mode), and after the specific voltage is reached, the applied voltage is constant. (Hereinafter referred to as a constant voltage mode) charging method.
  • the charging is terminated when the current value in the constant voltage mode becomes a sufficiently small value.
  • the cycle performance of the battery may be deteriorated depending on the use environment and the charging condition of the battery.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2004-158766 describes a charging voltage setting device configured to decrease the charging voltage as the temperature of the lithium ion battery increases.
  • a charging voltage Vch per unit cell of a lithium ion battery is set so as to satisfy Vch (V) ⁇ 4.2 within a range of 25 ⁇ Tx (° C.) ⁇ 30, and 30 ⁇ Tx (° C.). In the range of ⁇ 60, Vch (V) ⁇ ⁇ 0.005Tx + 4.35 is satisfied.
  • Patent Document 2 Japanese Patent Laid-Open No. 2010-16944 describes a charging voltage control method for charging a battery cell with a voltage Vx corresponding to the temperature Tx of the battery cell.
  • Tctl the temperature at which charging voltage suppression should be started due to a high temperature
  • Vctl the maximum charging voltage that can be allowed by the battery cell at that temperature Tctl
  • Vctl the maximum temperature that the battery cell can safely accept
  • Vx ⁇ [(Tlim ⁇ Tx) / (Tlim ⁇ Tctl)] ⁇ (Vctl 2 ⁇ Ve 2 ) + Ve 2 ⁇ 1 / 2
  • the voltage Vx is set.
  • the charging voltage Vx for constant voltage charging is not reduced step by step relatively relatively at each step as the temperature of the battery cell Tx increases. It is described that the battery cell can be charged in excess by the difference from the level of the stage since the temperature is lowered correspondingly to the temperature Tx of the battery cell.
  • the battery cell is composed of various materials such as a positive electrode, a negative electrode, an electrolytic solution, and a separator. There are various types of these constituent materials.
  • the battery characteristics such as the full charge capacity, the charging voltage, and the internal resistance of the obtained battery cell change.
  • the method of charging using the general formula as in Patent Documents 1 and 2 there are cases where the general formula does not fit well depending on the configuration of the battery cell. Therefore, in such a case, it is considered that the cycle performance of the battery deteriorates.
  • a battery cell comprising Temperature measuring means for measuring the temperature of the battery cell; Storage means for storing full charge voltage data indicating a relationship between a temperature of the battery cell and a full charge voltage which is a voltage at the time of full charge; Using the full charge voltage data, charging voltage setting means for setting a charging voltage when charging the battery cell; There is provided a battery pack comprising control means for controlling the charging voltage.
  • Temperature receiving means for receiving the temperature of the battery cell
  • Storage means for storing full charge voltage data indicating a relationship between a temperature of the battery cell and a full charge voltage which is a voltage at the time of full charge
  • charging voltage setting means for setting a charging voltage when charging the battery cell
  • a charge control system comprising control means for controlling the charge voltage.
  • a charging start step for starting charging the battery cell and measuring the temperature of the battery cell being charged; and A data acquisition step of extracting the full charge voltage at the measurement temperature from full charge voltage data indicating a relationship between the temperature of the battery cell and a full charge voltage which is a voltage at the time of full charge; A charging voltage setting step for setting a charging voltage when charging the battery cell to the full charge voltage; And a control method for controlling the charging voltage.
  • the full charge voltage data indicating the relationship between the temperature of the battery cell and the full charge voltage that is the voltage at the time of full charge is acquired, and the charge voltage of the battery cell is set using the full charge voltage data.
  • the battery cell can be close to full charge without being overcharged.
  • battery pack 10 refers to an assembled battery having at least one battery unit.
  • the “battery unit” refers to one having at least one battery cell 100.
  • the battery cell 100 included in the “battery unit” may include one or more single cells having a positive electrode, a negative electrode, and the like.
  • the plurality of “battery units” may have different numbers of battery cells 100.
  • a case will be described in which a plurality of battery cells 100 having two unit cells connected in parallel are connected in series.
  • FIG. 1 is a circuit diagram showing a configuration of the battery pack 10 according to the first embodiment.
  • the battery pack 10 includes a battery cell 100, temperature measuring means (a temperature calculation unit 200 and a temperature sensor 210) for measuring the temperature of the battery cell 100, a full charge voltage that is a voltage of the battery cell 100 and a full charge voltage.
  • Storage unit (control unit 300) for storing the full charge voltage data indicating the relationship between the full charge voltage and the charging voltage setting unit (control unit 300) for setting the charging voltage when charging the battery cell 100 using the full charge voltage data.
  • a voltage control unit 900 and a control means (voltage control unit 900) for controlling the charging voltage.
  • the control unit 300 extracts data from the full charge voltage data based on the detection result of the temperature measurement unit, and calculates a charge voltage when charging the battery cell 100.
  • the control unit 300 transmits the calculated charging voltage value to the voltage control unit 900.
  • the voltage control unit 900 sets the charging voltage of the battery pack 10 to the value received from the control unit 300. Thereafter, the voltage control unit 900 controls the voltage of the battery pack 10 to that voltage.
  • the control unit 300 interrupts the charging current with the switch 500 or sends a signal from the external communication terminal 760 to the charger. 100 charge is terminated.
  • the battery pack 10 includes a battery cell 100, temperature measuring means 220 for measuring the temperature of the battery cell 100, the temperature of the battery cell 100, and a full charge voltage that is a voltage at the time of full charge.
  • Storage unit 310 for storing full charge voltage data indicating the relationship between the above, a charge voltage setting unit 320 for setting a charge voltage when charging the battery cell 100 using the full charge voltage data, and a control for controlling the charge voltage. It is good also as a structure provided with the means 910.
  • the battery pack 10 includes a plurality of battery cells 100 of the same type.
  • the plurality of battery cells 100 are connected in series. Further, as described above, the battery cell 100 has two single cells.
  • the battery cell 100 is a lithium ion secondary battery.
  • the battery pack 10 in the first embodiment has a control circuit 20 in addition to the battery cell 100.
  • the control circuit 20 includes a temperature calculation unit 200, a control unit 300, a measurement unit 400, a current measurement unit 800, a voltage control unit 900, and a switch (SW) 500. Details will be described below.
  • the control circuit 20 in the first embodiment is connected to the battery cells 100 connected in series.
  • the control circuit 20 has an internal positive terminal 620, an internal negative terminal 640, an external positive terminal 720, and an external negative terminal 740.
  • the internal positive electrode terminal 620 is connected to the positive electrode of the battery cell 100 located closest to the positive electrode among the battery cells 100 connected in series.
  • the internal negative electrode terminal 640 is connected to the negative electrode of the battery cell 100 located closest to the negative electrode among the battery cells 100 connected in series.
  • the internal positive terminal 620 is connected to an external positive terminal 720 for connecting to an external device using the battery pack 10 via a wiring in the control circuit 20. Further, the internal negative terminal 640 is connected to an external negative terminal 740 for connecting to an external device using the battery pack 10 via a wiring in the control circuit 20.
  • a switch 500 for stopping charging or discharging is provided between the internal positive terminal 620 and the external positive terminal 720.
  • the switch 500 is provided between the internal positive terminal 620 and the external positive terminal 720 on the battery cell 100 side.
  • the switch 500 is a P-channel MOSFET (Metal Oxide Semiconductor Field Effect Transistor), for example.
  • MOSFET Metal Oxide Semiconductor Field Effect Transistor
  • two P-channel MOSFETs are provided. Thereby, one MOSFET is used to control charging. On the other hand, the other MOSFET is used to control the discharge.
  • Each MOSFET in the switch 500 is connected to the measurement unit 400.
  • the switch 500 is an N-channel MOSFET, the switch 500 is disposed between the internal negative terminal 640 and the external negative terminal 740.
  • the switch 500 may be an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT), a relay, or a breaker, for example.
  • IGBT Insulated Gate Bipolar Transistor
  • the temperature measurement means in the first embodiment includes a temperature calculation unit 200 and a temperature sensor 210.
  • the temperature sensor 210 is connected to the temperature calculation unit 200.
  • the temperature sensor 210 is arrange
  • the temperature sensor 210 may be disposed in another place in the plurality of battery cells 100.
  • the temperature sensor 210 detects the temperature of the battery cell 100.
  • the temperature calculation unit 200 calculates the temperature of the battery cell 100 using the signal output from the temperature sensor 210.
  • the charging voltage setting means in the first embodiment includes a control unit 300 and a voltage control unit 900.
  • a temperature calculation unit 200 and a measurement unit 400 are connected to the control unit 300.
  • the control unit 300 includes a storage unit (not shown) that stores full charge voltage data indicating a relationship between the temperature of the battery cell 100 and a full charge voltage that is a voltage at the time of full charge.
  • the control unit 300 performs arithmetic processing based on the temperature of the battery cell 100 calculated by the temperature calculation unit 200. Specifically, based on the temperature of battery cell 100 calculated by temperature calculation unit 200, control unit 300 calculates a charging voltage when charging battery cell 100 from full charge voltage data.
  • the control unit 300 transmits the calculated charging voltage value to the voltage control unit 900.
  • the voltage control unit 900 sets the charging voltage of the battery pack 10 to the value received from the control unit 300. Thereafter, the voltage control unit 900 controls the voltage of the battery pack 10 to that voltage.
  • the controller 300 is connected to an external communication terminal 760 for transmitting / receiving signals to / from an external device.
  • the control unit 300 transmits a signal to an external device (not shown) via the external communication terminal 760.
  • the control unit 300 receives a signal from an external device via the external communication terminal 760.
  • the battery pack 10 has a protection circuit in order to improve safety and charge / discharge cycle life.
  • the protection circuit includes a control unit 300, a measurement unit 400, and a switch 500.
  • the protection circuit has a function of forcibly terminating charging when the battery cell 100 is charged with a voltage exceeding the overcharge protection voltage.
  • Measurement unit 400 measures the voltage and current of battery cell 100.
  • the control unit 300 is connected to the measurement unit 400.
  • the control unit 300 cuts off the charging current by the switch 500 or sends a signal from the external communication terminal 760 to the charger. Thus, the charging of the battery cell 100 is terminated.
  • the battery pack 100 is packaged including the plurality of battery cells 100 and the control circuit 20.
  • FIG. 4 is a modification of FIG.
  • the charging method according to the first embodiment includes the following steps. Charging of the battery cell 100 is started (S110). The temperature of the battery cell 100 is measured (S120). Based on the measured temperature, a charging voltage for charging the battery cell 100 is calculated from the fully charged voltage data (S130). The charging voltage is set to the calculated charging voltage (S140). After the constant voltage mode is entered and the current starts to be reduced, a condition is determined that the charging current becomes equal to or lower than the charge end current value (S150). When the condition is not satisfied (No at S150), the charging is continued. When the condition is satisfied (S150 Yes), the charging of the battery cell 100 is terminated (S160).
  • each step will be described in detail.
  • the external positive terminal 720 and the external negative terminal 740 are connected to the positive and negative electrodes of the power supply source. Thereby, charging of the battery cell 100 is started.
  • the measuring unit 400 measures the voltage of the battery cell 100
  • the current measuring unit 800 measures the charging current of the battery cell 100 (S110).
  • the temperature calculation unit 200 calculates the temperature of the battery cell 100 using the signal output from the temperature sensor 210 (S120).
  • control unit 300 receives the temperature result calculated from the temperature calculation unit 200, and calculates the charging voltage when charging the battery cell 100 from the full charge voltage data based on the temperature result (S130).
  • a method for calculating the charging voltage will be described below.
  • the calculation of the charging voltage in the first embodiment is performed based on the full charging voltage data indicating the relationship between the temperature of the battery cell 100 and the charging voltage that is the full charging capacity at each temperature. Since the full charge voltage data varies depending on the type of battery cell, when the type of battery cell changes, the data of the battery cell is measured in advance.
  • the full charge capacity refers to a charge capacity when the battery pack 10 is charged under standard charge conditions at a reference temperature. For example, at 20 ° C., the charge voltage is 4.2 V, and the charge end current value is a capacity when charging is performed under the condition that the charge end rate is 0.05 ItA.
  • the reference temperature is preferably room temperature.
  • the charge voltage is set when the battery cell 100 is set to a certain temperature and the charge end current value is set to the same value as when the full charge capacity is measured.
  • the charging voltage when the full charge capacity is reached at the temperature By measuring the charging voltage at the full charge capacity at each temperature, full charge voltage data indicating the relationship between the temperature of the battery cell 100 and the charge voltage at the full charge capacity at each temperature is created.
  • the full charge voltage data is preferably measured and memorized in the temperature range where the lithium ion battery is practically charged.
  • the full charge voltage data may be stored in a storage unit (not shown) of the control unit 300, or may be stored in an external device and received from the external communication terminal 760.
  • the battery cell 100 is overloaded at each temperature. It can be close to full charge without charging.
  • the battery cell 100 is further provided with the termination current setting means (control part 300).
  • the termination current setting means preferably corrects the charge termination current value based on the ratio of the current full charge capacity to the initial capacity value that is the initial full charge capacity of the battery cell 100. Specifically, it is preferable to correct the charge end current value to be lower as the ratio of the current full charge capacity to the initial capacity value becomes smaller.
  • the charging end current value is corrected to be lower as the ratio of the current full charging capacity to the initial capacity value of the battery cell 100 becomes smaller, so that the charging end rate is not changed.
  • the charge end current value is corrected from 250 mA to 200 mA.
  • the current full charge capacity of the battery cell is measured by capacity measuring means. Specifically, the current can be calculated by measuring the current with the current measuring unit 800 and integrating the current value with the control unit 300.
  • control unit 300 transmits the calculated charging voltage value to the voltage control unit 900.
  • the voltage control unit 900 sets the charging voltage of the battery pack 10 to the value received from the control unit 300. Thereafter, the voltage control unit 900 controls the voltage of the battery pack 10 to the voltage (S140).
  • the control unit 300 receives the charging current of the battery cell 100 from the measurement unit 400, and determines a condition that the charging current is equal to or less than the set charging end current value (S150). When the condition is not satisfied, charging is continued (No in S150). At this time, as shown in FIG. 3, after the charging is continued, the temperature of the battery cell 100 may be measured again, and the charging voltage when charging the battery cell 100 may be calculated again. Further, as shown in FIG. 4, after the charging is continued, the condition that the charging current becomes equal to or lower than the charging end current value may be determined without performing the remeasurement of the temperature of the battery cell 100.
  • the charge end current value can be the charge end current value used when measuring the full charge capacity. For example, a value at which the charge end rate is 0.05 ItA can be used.
  • a signal is transmitted from the external communication terminal 760 of the control unit 300 to the power supply source (not shown), and the charging of the battery cell 100 is terminated (S160).
  • a signal is transmitted from the control unit 300 to the switch 500, and the charging current is interrupted by the switch 500, thereby terminating the charging of the battery cell 100 (S160).
  • charging of the battery pack 10 according to the first embodiment is controlled.
  • the battery cell 100 is comprised from various materials, such as a positive electrode, a negative electrode, electrolyte solution, and a separator. There are various types of these constituent materials.
  • the battery characteristics such as the full charge capacity, the charging voltage, and the internal resistance of the obtained battery cell change.
  • the battery pack 10 according to the first embodiment acquires in advance full charge voltage data indicating a relationship between the temperature of the battery cell 100 and a full charge voltage that is a voltage at the time of full charge, and uses the full charge voltage data to obtain a battery.
  • the charging voltage of the cell 100 is set. By doing this, even if the type of the battery cell 100, that is, the constituent material and the amount of the battery cell 100 is changed, the battery cell 100 can be prevented from being overcharged at a temperature exceeding the full charge, and Can approach full charge capacity.
  • the battery pack 10 having the battery cells 100 it is possible to prevent the battery pack 10 having the battery cells 100 from being overcharged, and to approach full charge.
  • the voltage control unit 900 is in the battery pack 10, but the voltage control unit 900 may be provided outside the battery pack 10. In that case, the charging voltage data is transmitted from the control unit 300 to the voltage control unit 900 via the external communication terminal 760.
  • a battery pack 10 according to the second embodiment will be described.
  • the second embodiment is the same as the first embodiment except that each battery cell 100 includes a temperature sensor 210. Therefore, in the second embodiment, the description will focus on the parts that are different from the first embodiment.
  • FIG. 5 is a circuit diagram showing a configuration of the battery pack 10 according to the second embodiment.
  • the temperature measurement means in the second embodiment includes a temperature calculation unit 200 and a plurality of temperature sensors 210 provided for each battery cell 100. Each temperature sensor 210 is connected to the temperature calculation unit 200. Each temperature sensor 210 detects the temperature of each battery cell 100.
  • the temperature calculation unit 200 calculates the temperature of each of the plurality of battery cells 100 based on the detection result of each temperature sensor 210, and identifies the maximum temperature among the plurality of battery cells 100.
  • the charging voltage setting means in the second embodiment calculates a charging voltage when charging the battery cell 100 based on the maximum temperature among the plurality of battery cells 100 specified by the temperature calculation unit 200.
  • FIGS. 6 and 7 are flowcharts for explaining the charging method according to the second embodiment.
  • FIG. 7 is a modification of FIG.
  • the charging method according to the second embodiment includes the following steps. Charging of the battery cell 100 is started (S110). The temperatures of the plurality of battery cells 100 are measured (S122). The maximum temperature is specified among the plurality of battery cells 100 (S124). Based on the specified maximum temperature of the battery cell 100, a charging voltage for charging the battery cell 100 is calculated from the full charge voltage data (S132). The charging voltage is set to the calculated charging voltage (S140).
  • the external positive terminal 720 and the external negative terminal 740 are connected to the positive and negative electrodes of the power supply source. Thereby, charging of the battery cell 100 is started.
  • the measuring unit 400 measures the voltage of the battery cell 100
  • the current measuring unit 800 measures the charging current of the battery cell 100 (S110).
  • the temperature calculation unit 200 receives the detection result of the temperature of each battery cell 100 from the temperature sensor 210, calculates the temperature of the battery cell 100 based on the detection result, and is the maximum among the plurality of battery cells 100.
  • the temperature is specified (S124).
  • control unit 300 receives the maximum temperature result from the temperature calculation unit 200, and calculates a charging voltage when charging the battery cell 100 from the fully charged voltage data based on the maximum temperature (S132).
  • the following steps are the same as those in the first embodiment except that the maximum temperature of the battery cell 100 is used.
  • the plurality of battery cells 100 in the battery pack 10 may vary in temperature internally due to the arrangement of the battery cells 100.
  • the temperature of the battery cell 100 near Cell 3 in FIG. 5
  • the battery cell 100 is activated as the temperature increases, and the DC resistance decreases. Therefore, even if charging conditions such as voltage, current, and time are the same, the capacity of the battery cell 100 becomes easier as the battery temperature increases. Therefore, under the same charging condition, the battery cell 100 having a higher battery temperature becomes overcharged.
  • the charging is forcibly terminated by the protection circuit.
  • the battery pack 10 sets the charging voltage from the full charging voltage data based on the maximum temperature in each battery cell 100. By doing so, since the battery cell 100 that reaches a voltage exceeding the overcharge protection voltage is suppressed, it is difficult for the protection circuit to forcibly terminate the charge.
  • each of the plurality of battery cells 100 included in the battery pack 10 can be brought close to full charge while suppressing overcharging.
  • FIG. 8 is a circuit diagram showing configurations of the battery pack 10 and the control circuit 20 according to the third embodiment.
  • the third embodiment is the same as the first embodiment except that the control circuit 20 is provided outside the battery pack 10. Details will be described below.
  • control circuit 20 is provided outside the battery pack 10.
  • the control circuit 20 is provided, for example, in a charging device (not shown) that is independent from the battery pack 10.
  • the control circuit 20 may be provided in a device used when the battery pack 10 is discharged and used.
  • the battery pack 10 is provided with a positive terminal 820 and a negative terminal 840 for charging and discharging the battery pack 10.
  • the control circuit 20 includes a temperature calculation unit 200, a control unit 300, a measurement unit 400, and a switch (SW) 500.
  • the positive terminal 920 of the control circuit 20 is provided at a position corresponding to the positive terminal 820 of the battery pack 10 on the battery pack 10 side of the control circuit 20.
  • the negative terminal 940 of the control circuit 20 is provided at a position corresponding to the negative terminal 840 of the battery pack 10. These terminals are connected to each other by wiring (not shown). As a result, charging power is supplied from the control circuit 20 to the battery pack 10.
  • control circuit 20 is provided outside the battery pack 10.
  • the control circuit 20 is connected to the battery cell 100 via wiring.
  • FIG. 9 is a circuit diagram showing configurations of the battery pack 10 and the control circuit 20 according to the fourth embodiment.
  • the fourth embodiment is the same as the third embodiment except that a plurality of temperature sensors 210 are provided for each battery cell 100.
  • the charging voltage setting means in the fourth embodiment is based on the maximum temperature in the battery cell 100 specified by the temperature calculation unit 200, and the battery cell 100 is obtained from the full charge voltage data. The charging voltage when charging is calculated.
  • control circuit 20 is provided outside the battery pack 10
  • various other configurations are possible.
  • only the control unit 300 may be provided outside the battery pack 10.
  • a charging device including the above-described control circuit 20 is also disclosed.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

L'invention concerne une batterie d'accumulateurs (10) comprenant : des éléments accumulateurs (100) ; un moyen de mesure de la température (capteur thermique (210) et unité de calcul de la température (200)) destiné à mesurer la température des éléments accumulateurs (100) ; un moyen de stockage (unité de commande (300)) destiné à stocker des données de tension à pleine charge, qui représentent la relation entre la température des éléments accumulateurs (100) et une tension de pleine charge, qui est la tension existant lorsque les éléments accumulateurs sont pleinement chargés ; un moyen de paramétrage de la tension de chargement (moyen de commande (300) et unité de commande de la tension (900)) qui utilise les données de tension à pleine charge pour paramétrer une tension de chargement en vue du chargement des éléments accumulateurs (100) ; et un moyen de commande (unité de commande de la tension (900)) destiné à commander la tension de chargement.
PCT/JP2012/004150 2011-07-08 2012-06-27 Batterie d'accumulateurs, système de commande du chargement et procédé de chargement WO2013008397A1 (fr)

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JP2011152170 2011-07-08
JP2011-152170 2011-07-08

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WO2013008397A1 true WO2013008397A1 (fr) 2013-01-17

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016165168A (ja) * 2015-03-06 2016-09-08 株式会社豊田自動織機 充電制御装置及び充電制御方法
CN113138343A (zh) * 2021-04-09 2021-07-20 阳光三星(合肥)储能电源有限公司 电池系统的容量校准方法、电池系统及可读存储介质

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06315234A (ja) * 1993-04-28 1994-11-08 Sanyo Electric Co Ltd 電池の充電方法
JPH09233732A (ja) * 1996-02-29 1997-09-05 Sanyo Electric Co Ltd 二次電池の充電方法および装置
JP2002165380A (ja) * 2000-11-24 2002-06-07 Tokyo R & D Co Ltd 組電池の充電システム
JP2003087991A (ja) * 2001-09-07 2003-03-20 Nissan Motor Co Ltd 充電装置および充電方法
JP2011091879A (ja) * 2009-10-20 2011-05-06 Toyota Motor Corp 車両への蓄電状況表示システム

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06315234A (ja) * 1993-04-28 1994-11-08 Sanyo Electric Co Ltd 電池の充電方法
JPH09233732A (ja) * 1996-02-29 1997-09-05 Sanyo Electric Co Ltd 二次電池の充電方法および装置
JP2002165380A (ja) * 2000-11-24 2002-06-07 Tokyo R & D Co Ltd 組電池の充電システム
JP2003087991A (ja) * 2001-09-07 2003-03-20 Nissan Motor Co Ltd 充電装置および充電方法
JP2011091879A (ja) * 2009-10-20 2011-05-06 Toyota Motor Corp 車両への蓄電状況表示システム

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016165168A (ja) * 2015-03-06 2016-09-08 株式会社豊田自動織機 充電制御装置及び充電制御方法
CN113138343A (zh) * 2021-04-09 2021-07-20 阳光三星(合肥)储能电源有限公司 电池系统的容量校准方法、电池系统及可读存储介质
CN113138343B (zh) * 2021-04-09 2023-12-26 阳光储能技术有限公司 电池系统的容量校准方法、电池系统及可读存储介质

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