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Secondary battery charging method and charging apparatus

A secondary battery and charging method technology, applied in secondary battery charging/discharging, battery circuit devices, secondary batteries, etc., can solve problems such as insufficient battery capacity, insufficient charging of secondary batteries, etc., to achieve invalid time, avoid The effect of overcharging

Inactive Publication Date: 2013-03-06
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, there is a possibility that the charging may be terminated due to the judgment of full charging based on the voltage drop immediately after the false peak voltage is detected.
The result is that the secondary battery is undercharged, resulting in insufficient battery capacity

Method used

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  • Secondary battery charging method and charging apparatus
  • Secondary battery charging method and charging apparatus
  • Secondary battery charging method and charging apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0024] Figure 5 The charging device according to Embodiment 1 shown includes a charger side block 1 and a main body side block 2 .

[0025] The charger side block 1 includes a charging power supply unit 11 and is configured to be detachably attached to the main body side block 2 . The charging power supply unit 11 is configured to input an AC commercial power supply of approximately 100V to 240V to supply a constant voltage / constant current power supply to the main body side block 2 . The charging power source unit 11 is configured to supply a current equal to or less than the maximum current when a predetermined maximum current cannot be supplied to the main body side block 2 .

[0026] The main body side block 2 constitutes charging means, sets the inactive time in the above-mentioned -ΔV control, and performs judgment on full charge of the secondary battery. The charging device of the main body side block 2 includes a secondary battery 21 , a charging current control ele...

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PUM

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Abstract

This invention provides a secondary battery charging method wherein, when a secondary battery (21) is charged, -?V, which renders a decrease of ?V by which the battery voltage of the secondary battery (21) decreases from the peak voltage thereof, is detected, thereby determining that the battery is fully charged. In the secondary battery charging method: an invalidation time, in which the detections of the peak voltage and -?V are invalidated, is established; the invalidation time is calculated by dividing a current integrated quantity of a rapid charging current that is caused to flow into the secondary battery (21) by an average charging current quantity at the time of the rapid charging; and after a lapse of the invalidation time from the start of the charging of the secondary battery (21), -?V, which renders the decrease of ?V by which the battery voltage of the secondary battery (21) decreases from the peak voltage thereof, is detected, thereby determining that the battery is fully charged.

Description

technical field [0001] The present invention relates to a charging method and a charging device for a secondary battery, in particular to a charging method for a secondary battery that detects that the battery voltage has dropped by ΔV from the peak voltage when the secondary battery is being charged to determine a fully charged secondary battery. Method and charging device. Background technique [0002] Charging of the secondary battery needs to be properly performed. The reason for this is that in the case of insufficient charging, the device cannot be fully operated due to insufficient battery capacity, while in the case of overcharging, abnormal heat generation and performance degradation of the battery may occur. [0003] In particular, in general secondary batteries, even if normal charge and discharge cycles are repeated, the chargeable battery capacity gradually decreases and the capacity deteriorates. In addition to this, the charging environment temperature, over...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/10H01M10/44H01M10/48
CPCY02E60/12H02J2007/0049G01R31/362H02J7/0077H01M10/48H02J7/045H02J7/0081H01M10/44H02J7/0049H02J7/007184H02J7/00712Y02E60/10G01R31/3835
Inventor 高田康作
Owner PANASONIC CORP