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Charging control system and motor drive set

Inactive Publication Date: 2005-08-31
MATSUSHITA ELECTRIC WORKS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in this structure of preventing overcharge only by detecting the charge or the voltage of the battery, there is a problem that the structure becomes complicated due to the need for a plurality of voltage detection circuits

Method used

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  • Charging control system and motor drive set
  • Charging control system and motor drive set
  • Charging control system and motor drive set

Examples

Experimental program
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Embodiment Construction

[0027] figure 1 A motor drive kit 10 is shown comprising a charging control system 50 according to a first embodiment of the present invention. The tool kit 10 includes: a motor-driven tool 12 constituting a rechargeable drill driver; a battery pack 14 removably mounted to the tool 12 ; and a charging unit 16 that charges the battery pack 14 .

[0028] The motor-driven tool 12 includes a fitting portion 20 , a motor 22 , a trigger switch 24 , and a chuck (rotating portion) 26 . The fitting portion 20 is formed in the pistol grip handle of the tool body 18 of the tool 12, and the battery pack 14 is mounted therein in a movable state. A motor 22 is included in the tool body 18 and is driven by current supplied from the battery pack 14 . A switch 24 is located at the handle of the tool body 18 and is controlled to turn on and off the electric current supply to the motor 22 . The chuck 26 is located at the end of the tool body 18, and chucks a drill, a drill bit, etc. in a mova...

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PUM

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Abstract

A charging control system. The system has a function as a switch controller which includes a charge mode judging executor 66, a charging time monitoring executor 68 and a switch controlling executor 72. The executor 66 judges whether present control is a constant current control or a constant voltage control. The executor 68 monitors whether or not a constant current charging time exceeds a threshold time by utilizing a judging result of the executor 66. The executor 72 turns a switch 54 off when a monitoring result of the executor 68 indicates that the constant current charging time exceeds the threshold time.

Description

technical field [0001] The present invention relates to a charging control system having a function to prevent overcharging of a rechargeable battery such as a lithium ion battery, a nickel hydrogen battery, and the like, and a motor drive toolset equipped with the system. Background technique [0002] The prior art device described in Japanese Patent Laid-Open No. 10-066277 includes: a rechargeable battery; a charging current and voltage control circuit that charges the battery through constant current control and constant voltage control; and a safety circuit that is located in the battery pack. (battery pack). The safety circuit prevents the device from charging the battery when the voltage it detects reaches a predetermined first voltage. [0003] The device also includes a charging voltage detection circuit and a battery voltage detection circuit. At the same time, the device is configured to prevent itself from charging the battery when the voltage detected by each d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25F5/00H01M10/44H02J7/00H02J7/04H02J7/10
CPCH02J7/0073H02J7/0071
Inventor 久保田笃优大桥敏治
Owner MATSUSHITA ELECTRIC WORKS LTD
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