Battery control system, battery pack, electronic device and charger
First Claim
1. A battery control system comprising:
- a measurement unit that measures voltages of a plurality of battery units which are connected in series to each other; and
a battery control unit that controls discharge of the battery units on the basis of the voltages measured by the measurement unit,wherein the battery control unit;
specifies a minimum voltage unit in which the voltage is lowest, on the basis of the voltages measured by the measurement unit, when the discharge of the battery unit is performed,continues the discharge of all the battery units, as they are, when an alarm condition that the voltage of the minimum voltage unit is equal to or less than a discharge reference voltage value is not satisfied, the discharge reference voltage value being higher than an over-discharge detection voltage value indicating an over-discharged state, andoutputs a first signal for reducing a discharge current in the discharge in response to the alarm condition being satisfied.
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Accused Products
Abstract
A battery pack (10) includes a plurality of battery cells (100), a measurement unit (measurement unit (200)), and a battery control unit (battery control unit (400)). The plurality of battery cells 100 are connected in series to each other. The measurement unit (200) measures voltages of the battery cells (100). The battery control unit (400) controls discharge of the battery cells (100) on the basis of the voltages measured by the measurement unit (200). In addition, when the battery cells (100) perform the discharge, the battery control unit (400) specifies a minimum voltage cell in which the voltage is lowest on the basis of the voltages measured by the measurement unit (200). Further, before the minimum voltage cell is over-discharged, the battery control unit (400) outputs a first signal for reducing a discharge current in the discharge.
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Citations
19 Claims
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1. A battery control system comprising:
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a measurement unit that measures voltages of a plurality of battery units which are connected in series to each other; and a battery control unit that controls discharge of the battery units on the basis of the voltages measured by the measurement unit, wherein the battery control unit; specifies a minimum voltage unit in which the voltage is lowest, on the basis of the voltages measured by the measurement unit, when the discharge of the battery unit is performed, continues the discharge of all the battery units, as they are, when an alarm condition that the voltage of the minimum voltage unit is equal to or less than a discharge reference voltage value is not satisfied, the discharge reference voltage value being higher than an over-discharge detection voltage value indicating an over-discharged state, and outputs a first signal for reducing a discharge current in the discharge in response to the alarm condition being satisfied. - View Dependent Claims (2, 3, 4)
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5. A battery control system comprising:
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a measurement unit that measures voltages of a plurality of battery units which are connected in series to each other; and a battery control unit that; controls charge of the battery units on the basis of the voltages measured by of the measurement unit, wherein the battery control unit specifies a maximum voltage unit in which the voltage is highest, on the basis of the voltages measured by the measurement unit, when the charge is performed on the battery units, continues the charge of all the battery units, as they are, when an alarm condition that the voltage of the maximum voltage unit is equal to or greater than a charge reference voltage value is not satisfied, the charge reference voltage value being lower than an over-charge detection voltage value indicating an over-charged state, and outputs a first signal for reducing a charge current in the charge in response to the alarm condition being satisfied. - View Dependent Claims (6, 7)
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8. A battery pack comprising:
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a plurality of battery units which are connected in series to each other; a measurement unit that measures voltages of the battery units; and a battery control unit that controls discharge of the battery units on the basis of the voltages measured by the measurement unit, wherein the battery control unit; specifies a minimum voltage unit in which the voltage is lowest, on the basis of the voltages measured by the measurement unit, when the discharge of the battery unit is performed, continues the discharge of all the battery units, as they are, when an alarm condition that the voltage of the minimum voltage unit is equal to or less than a discharge reference voltage value is not satisfied, the discharge reference voltage value being higher than an over-discharge detection voltage value indicating an over-discharged state, and outputs a first signal for reducing a discharge current in the discharge in response to the alarm condition being satisfied.
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9. A battery pack comprising:
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a plurality of battery units which are connected in series to each other; a measurement unit that measures voltages of the battery units; and a battery control unit that controls charge of the battery units on the basis of the voltages measured by of the measurement unit, wherein the battery control unit; specifies a maximum voltage unit in which the voltage is highest, on the basis of the voltages measured by the measurement unit, when the charge is performed on the battery units, continues the charge of all the battery units, as they are, when an alarm condition that the voltage of the maximum voltage unit is equal to or greater than a charge reference voltage value is not satisfied, the charge reference voltage value being lower than an over-charge detection voltage value indicating an over-charged state, and outputs a first signal for reducing a charge current in the charge in response to the alarm condition being satisfied.
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10. An electronic device comprising:
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a battery pack including a plurality of battery units which are connected in series to each other; a measurement unit that measures voltages of the battery units; a battery control unit that controls discharge of the battery units on the basis of the voltages measured by the measurement unit; a load that consumes power of the discharge from the battery pack; and a load control unit, connected to the battery control unit which controls the load, wherein the battery control unit; specifies a minimum voltage unit in which the voltage is lowest, on the basis of the voltages measured by the measurement unit, when the discharge of the battery unit is performed, continues the discharge of all the battery units, as they are, when an alarm condition that the voltage of the minimum voltage unit is equal to or less than a discharge reference voltage value is not satisfied, the discharge reference voltage value being higher than an over-discharge detection voltage value indicating an over-discharged state, and outputs a first signal for reducing a discharge current in the discharge in response to the alarm condition being satisfied, and the load control unit reduces the discharge current when the first signal is received from the battery control unit. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A charger comprising:
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a measurement unit that measures voltages of a plurality of battery units which are connected in series to each other; a battery control unit that controls charge of the battery units on the basis of the voltages measured by of the measurement unit; and a charge control unit, connected to the battery control unit, which controls a charge voltage and a charge current in the charge, wherein the battery control unit; specifies a maximum voltage unit in which the voltage is highest, on the basis of the voltages measured by the measurement unit, when the charge is performed on the battery units, continues the charge of all the battery units, as they are, when an alarm condition that the voltage of the maximum voltage unit is equal to or greater than a charge reference voltage value is not satisfied, the charge reference voltage value being lower than an over-charge detection voltage value indicating an over-charged state, and outputs a first signal for reducing the charge current in the charge in response to the alarm condition being satisfied, and the charge control unit reduces the charge current when the first signal is received from the battery control unit.
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Specification