Charging system for electric power tool, battery pack for electric power tool, and battery charger for electric power tool
First Claim
1. A charging system for electric power tool, comprising a battery pack and a battery charger,wherein the battery pack is used for driving an electric power tool and the battery pack has a rechargeable battery (B1, B2, . . . Bn) serving as a power source for driving the electric power tool, and a battery-side microcomputer which is a microcomputer monitoring a state of the rechargeable battery (B1, B2, . . . Bn);
- wherein the battery charger is detachably mounted with the battery pack and the battery charger has a charging unit, which supplies a charging power to the battery pack and charges the rechargeable battery (B1, B2, . . . Bn), and a charger-side microcomputer which is a microcomputer controlling an operation of the charging unit,wherein at least while the rechargeable battery (B1, B2, . . . Bn) is charged by the charging unit, the battery-side microcomputer and the charger-side microcomputer mutually perform data communication and execute mutual operation confirmation for confirming an operational state of a microcomputer of a communication counterpart based on a result of the data communication, andwhen one of the battery-side microcomputer and the charger-side microcomputer detects an abnormality of the operational state of the microcomputer of the communication counterpart as a result of the mutual operation confirmation, a microcomputer which has detected the abnormality executes a predetermined charge stop processing for stopping charging of the rechargeable battery (B1, B2, . . . Bn).
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Accused Products
Abstract
Each of a battery charger and a battery pack has a microcomputer. The respective microcomputers mutually perform data communication while the battery pack is being charged by the battery charger, and confirm an operational state of the microcomputer of the communication counterpart (mutual operation confirmation) based on a result of the data communication. When an abnormality of one of the microcomputers is detected, the other microcomputer executes a predetermined process for stopping charging.
55 Citations
13 Claims
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1. A charging system for electric power tool, comprising a battery pack and a battery charger,
wherein the battery pack is used for driving an electric power tool and the battery pack has a rechargeable battery (B1, B2, . . . Bn) serving as a power source for driving the electric power tool, and a battery-side microcomputer which is a microcomputer monitoring a state of the rechargeable battery (B1, B2, . . . Bn); -
wherein the battery charger is detachably mounted with the battery pack and the battery charger has a charging unit, which supplies a charging power to the battery pack and charges the rechargeable battery (B1, B2, . . . Bn), and a charger-side microcomputer which is a microcomputer controlling an operation of the charging unit, wherein at least while the rechargeable battery (B1, B2, . . . Bn) is charged by the charging unit, the battery-side microcomputer and the charger-side microcomputer mutually perform data communication and execute mutual operation confirmation for confirming an operational state of a microcomputer of a communication counterpart based on a result of the data communication, and when one of the battery-side microcomputer and the charger-side microcomputer detects an abnormality of the operational state of the microcomputer of the communication counterpart as a result of the mutual operation confirmation, a microcomputer which has detected the abnormality executes a predetermined charge stop processing for stopping charging of the rechargeable battery (B1, B2, . . . Bn). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A battery pack for electric power tool, which is used for driving electric power tool and the battery pack comprises a rechargeable battery (B1, B2, . . . Bn) serving as a power source for driving the electric power tool, and a battery-side microcomputer which is a microcomputer monitoring a state of the rechargeable battery (B1, B2, . . . Bn),
wherein the battery pack is configured so as to be detachably mounted to a battery charger which includes a charging unit, which supplies a charging power to the battery pack to charge the rechargeable battery (B1, B2, . . . Bn), and a charger-side microcomputer which is a microcomputer controlling an operation of the charging unit, and the battery-side microcomputer is configured to, at least while the rechargeable battery (B1, B2, . . . Bn) is charged by the charging unit, perform a data communication with the charger-side microcomputer and confirm an operational state of the charger-side microcomputer based on a result of the data communication, and the battery-side microcomputer is configured to, when an abnormality of the operational state of the charger-side microcomputer is detected, execute a predetermined charge stop processing for stopping charging of the rechargeable battery (B1, B2, . . . Bn).
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13. A battery charger for electric power tool detachably mounted with a battery pack which is used for driving electric power tool and the battery pack comprises a rechargeable battery (B1, B2, . . . Bn) serving as a power source for driving the electric power tool, and a battery-side microcomputer which is a microcomputer monitoring a state of the rechargeable battery (B1, B2, . . . Bn), the battery charger comprising a charging unit which supplies a charging power to the battery pack to charge the rechargeable battery (B1, B2, . . . Bn), and a charger-side microcomputer which is a microcomputer controlling an operation of the charging unit,
wherein, the charger-side microcomputer is configured to, at least while the rechargeable battery (B1, B2, . . . Bn) is charged by the charging unit, perform data communication with the battery-side microcomputer and confirm an operational state of the battery-side microcomputer based on a result of the data communication, and the charger-side microcomputer is configured to, when an abnormality of the operational state of the battery-side microcomputer is detected, execute a predetermined charge stop processing for stopping charging of the rechargeable battery (B1, B2, . . . Bn).
Specification