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Battery charging apparatus for charging a plurality of batterles

A charging device and multi-battery technology, applied in battery circuit devices, circuit devices, secondary battery charging/discharging, etc., can solve the problems of small charging capacity, reduced battery performance, and inability to charge current of secondary batteries, etc., to prevent excessive The effect of charging and preventing deterioration of battery performance

Inactive Publication Date: 2005-03-30
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for secondary batteries connected in series to be charged, the charging current of each secondary battery cannot be controlled.
Therefore, when charging is repeated, the secondary battery whose charging capacity is reduced is overcharged to degrade the performance of the battery to cause deterioration
Since the charging capacity of a degraded battery becomes smaller, the battery is overcharged and deteriorates rapidly

Method used

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  • Battery charging apparatus for charging a plurality of batterles
  • Battery charging apparatus for charging a plurality of batterles
  • Battery charging apparatus for charging a plurality of batterles

Examples

Experimental program
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Embodiment Construction

[0030] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments shown below are merely examples of the charging device to specifically express the technical idea of ​​the present invention, and the charging device of the present invention is not limited by the following content.

[0031] Furthermore, in this specification, in order to facilitate the understanding of the scope of the claims, the elements corresponding to the components described in the embodiments are indicated in the text of the "claims" and "summary of the invention". However, the members shown in the claims are not limited to the members of the embodiment.

[0032] figure 2 The charging device shown is provided with: a plurality of charging units 33 connected in series; a charging power supply unit 34 that makes a charging current flow through the charging units 33 connected in series; a charging control unit 35 that controls the series switches 31...

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Abstract

The battery charging apparatus has a plurality of charging units connected in series. A charging unit has a series switch connected in series with a rechargeable battery, and a parallel switch connected in parallel with the series connected rechargeable battery and series switch. A charging control section controls charging of a rechargeable battery by switching the series switch and parallel switch ON and OFF. The charging control section changes the duty factor for switching series switches and parallel switches ON and OFF, switches a charging unit between a charging mode and a cut-off mode at a prescribed duty factor, and controls rechargeable battery charging currents to charge a plurality of batteries.

Description

technical field [0001] The present invention relates to a charging device for charging a plurality of secondary batteries connected in series. Background technique [0002] In a charger for charging a plurality of secondary batteries, the secondary batteries are connected in parallel and charged (see Patent Document 1). The chargers described in the bulletin, such as figure 1 As shown, a switch 41 is connected in series to each secondary battery 42 , and the switch 41 is switched on and off by a charging control unit 43 . The secondary battery 42 is charged when the switch is turned on, and stops charging when the switch is turned off. The charge control unit 43 turns on the switch 41 before the secondary battery 42 is fully charged, and switches the switch 41 off when the secondary battery 42 is fully charged. Since the secondary battery 42 is not fully charged at the same time, the switch 41 connected to the fully charged secondary battery 42 is switched from on to off....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/02H01M10/44H02J7/00H02J7/04
CPCH02J7/041H02J2007/0037H02J7/045H02J7/0016H02J7/047H02J7/00302H02J7/0071H02J7/007194H02J7/04H02J7/007182H02J7/007192
Inventor 山下孝浩
Owner SANYO ELECTRIC CO LTD
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