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Battery charger

A charger and charging technology, applied in the direction of current collectors, different battery charging, electric vehicles, etc., can solve the problems of complicated charger structure and charging control, and inability to charge battery packs.

Active Publication Date: 2008-03-05
MAKITA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Such a charger requires a structure for discriminating the type of battery installed in the battery pack, and a structure for switching the charging method accordingly, thereby complicating the structure of the charger and the control of charging. change
Also, in this charger, a battery pack that does not have a memory for storing identification information cannot be charged.

Method used

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  • Battery charger
  • Battery charger

Examples

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Embodiment Construction

[0033] Next, an example of the best embodiment for carrying out the present invention will be described with reference to FIGS. 1 to 4 . In this embodiment, a description will be given of a charger that stops charging when the thermistor voltage value of a battery pack provided with a thermistor near the battery pack reaches a reference voltage value. In this charger, a value obtained by dividing the charging voltage value of the battery pack that increases during charging is set as the reference voltage value. FIG. 1 shows a configuration for charging a battery pack 200 including a battery pack made of nickel-hydrogen batteries using a charger 100 according to the present embodiment. FIG. 2 shows a configuration in which the charger 100 is used to charge a battery pack 300 including a battery pack composed of lithium-ion batteries. FIG. 3 shows the thermistor voltage of the thermistor TM1 provided in the battery pack 200, the thermistor voltage of the thermistor TM2 provided...

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Abstract

The object of the invention is to provide an improved technique of suitably charging a battery assembly irrespective of the kind of the battery assembly. The representative battery charger 100 includes a power supply section 110, a detecting section 130 that detects voltage that represents a temperature index of the battery assembly a reference voltage that is compared with the detected temperature-representing voltage of the battery assembly. The battery charger 100 stops supplying the charging current when the temperature-representing voltage of the battery assembly reaches or exceeds the reference voltage. The reference voltage varies according to the charging voltage of the battery assembly and thus, the threshold temperature to complete the charge can be varied according to the charging voltage of the battery assembly.

Description

technical field [0001] The present invention relates to a battery charger for charging a battery pack, and specifically relates to a technique for appropriately charging a battery pack irrespective of the type of the battery pack. Background technique [0002] There is a charger in which a battery pack including a battery pack is provided with a memory for storing identification information of the battery pack. In the charger disclosed in Japanese Unexamined Patent Publication No. 2005-65429 (refer to Patent Document 1), when the battery pack is connected, the identification information is read from the memory of the battery pack, and based on the identification information, it is discriminated that the battery is connected to the charger. The type of the battery pack in the package, and charge it with an appropriate charging method corresponding to the type of the battery pack. [0003] [Patent Document 1] JP Unexamined Publication No. 2005-65429 [0004] Such a charger r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/04H02J7/02
CPCH02J7/0091H02J7/0003H02J7/00047H02J7/007194
Inventor 榊原和征
Owner MAKITA CORP
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