Method for controlling battery pack
First Claim
1. A method for controlling a battery pack including a switching element that turns from OFF to ON if the battery pack with a rechargeable battery is in an abnormal state, a heat resistor that is connected to the switching element and the rechargeable battery in series, and through which current flows when the switching element turns to ON, and a fuse that is located in a position where the fuse is heated by the heat resistor through which the current flows and is connected to the rechargeable battery in series so that the fuse is disconnected with heat by the heat resistor at high temperature when the current flows to cut off a current flow in the rechargeable battery, the method comprising:
- determining whether the battery pack is in an abnormal state;
detecting whether the capacity or voltage of the rechargeable battery is less than a preset capacity or voltage value if it is determined that the battery pack is in an abnormal state; and
disconnecting the fuse with heat by turning the switching element to ON after the rechargeable battery is charged if it is detected that the battery pack is in an abnormal state and the capacity or voltage of the rechargeable battery is less than the preset capacity or voltage value.
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Accused Products
Abstract
A battery pack includes a switching element, a heat resistor, and a fuse. The switching element turns to ON if the battery pack becomes in an abnormal state. The heat resistor is connected to the switching element and a battery in series. Current flows through the heat resistor when the switching element turns to ON. The fuse is located in a position where the fuse is heated by the heat resistor through which the current flows. The fuse is connected to the battery in series so that the fuse is disconnected with heat by the heat resistor at high temperature. Thus, the fuse cuts off a current flow in the battery. If the battery pack is in an abnormal state, when the capacity or voltage of the battery is less than a preset capacity or voltage value, the fuse is disconnected with heat by turning the switching element to ON.
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Citations
21 Claims
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1. A method for controlling a battery pack including a switching element that turns from OFF to ON if the battery pack with a rechargeable battery is in an abnormal state, a heat resistor that is connected to the switching element and the rechargeable battery in series, and through which current flows when the switching element turns to ON, and a fuse that is located in a position where the fuse is heated by the heat resistor through which the current flows and is connected to the rechargeable battery in series so that the fuse is disconnected with heat by the heat resistor at high temperature when the current flows to cut off a current flow in the rechargeable battery, the method comprising:
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determining whether the battery pack is in an abnormal state; detecting whether the capacity or voltage of the rechargeable battery is less than a preset capacity or voltage value if it is determined that the battery pack is in an abnormal state; and disconnecting the fuse with heat by turning the switching element to ON after the rechargeable battery is charged if it is detected that the battery pack is in an abnormal state and the capacity or voltage of the rechargeable battery is less than the preset capacity or voltage value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for controlling a battery pack including a rechargeable battery, a fuse that is connected to the rechargeable battery in series, and a control circuit that determines whether the battery pack is in an abnormal state including the rechargeable battery, the rechargeable battery discharging through the fuse and the fuse is disconnected with heat by discharge current in this discharge operation if the control circuit determines that the battery pack is in an abnormal state, the method comprising:
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determining whether the battery pack is in an abnormal state; detecting whether the capacity or voltage of the rechargeable battery is less than a preset capacity or voltage value if it is determined that the battery pack is in an abnormal state; and disconnecting the fuse with heat by discharge current in discharge operation of the rechargeable battery after the rechargeable battery is charged if it is detected that the battery pack is in an abnormal state and the capacity or voltage of the rechargeable battery is less than the preset capacity or voltage value. - View Dependent Claims (20, 21)
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Specification