Battery pack for power tool, and power tool
First Claim
1. A battery pack for power tool comprising:
- a battery that includes at least one battery cell;
a monitoring circuit that monitors a status of the battery, the monitoring circuit being operated by receiving power supply from the battery;
a sleep mode switching unit that switches the battery pack to a sleep mode by stopping at least a part or all of operations of the monitoring circuit when the monitoring circuit detects a discharge end state where a discharge current from the battery is equal to or lower than a predetermined set current value, and the monitoring circuit further detects at least one of a voltage stable state where a voltage change amount in the battery cell is within a predetermined stable range of voltage change amount and a temperature stable state where a temperature change amount in the battery is within a predetermined stable range of temperature change amount.
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Accused Products
Abstract
A battery pack for power tool includes a battery, a monitoring circuit, and a sleep mode switching unit. The battery includes at least one battery cell. The monitoring circuit is operated by receiving power supply from the battery. The sleep mode switching unit switches the battery pack to a sleep mode by stopping at least a part or all of operations of the monitoring circuit when the monitoring circuit detects a discharge end state where a discharge current from the battery is equal to or lower than a predetermined set current value, and the monitoring circuit further detects at least one of a voltage stable state where a voltage change amount in the battery cell is within a predetermined stable range of voltage change amount and a temperature stable state where a temperature change amount in the battery is within a predetermined stable range of temperature change amount.
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Citations
16 Claims
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1. A battery pack for power tool comprising:
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a battery that includes at least one battery cell; a monitoring circuit that monitors a status of the battery, the monitoring circuit being operated by receiving power supply from the battery; a sleep mode switching unit that switches the battery pack to a sleep mode by stopping at least a part or all of operations of the monitoring circuit when the monitoring circuit detects a discharge end state where a discharge current from the battery is equal to or lower than a predetermined set current value, and the monitoring circuit further detects at least one of a voltage stable state where a voltage change amount in the battery cell is within a predetermined stable range of voltage change amount and a temperature stable state where a temperature change amount in the battery is within a predetermined stable range of temperature change amount. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A power tool comprising:
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a battery pack for power tool and a tool body, wherein the battery pack includes; a battery that has at least one battery cell; a monitoring circuit that monitors a status of the battery, the monitoring circuit being operated by receiving power supply from the battery; and a sleep mode switching unit that switches the battery pack to a sleep mode by stopping at least a part or all of operations of the monitoring circuit when the monitoring circuit detects a discharge end state where a discharge current from the battery is equal to or lower than a predetermined set current value, and the monitoring circuit further detects at least one of a voltage stable state where a voltage change amount in the battery cell is within a predetermined stable range of voltage change amount and a temperature stable state where a temperature change amount in the battery is within a predetermined stable range of temperature change amount, and wherein the tool body is configured so that the battery pack is detachably attached thereto and configured so as to be operated by receiving power supply from the battery pack.
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Specification