Showing posts with label Deteriorate. Show all posts
Showing posts with label Deteriorate. Show all posts

Sunday, November 27, 2016

Deteriorated NiCd charging current recovery

I charged deteriorated NiCd batteries dissipated by GE digital camer A1455. 200mA flew in the both batteries.

They were 115 and 60mA each, I charged them on Oct 27 the last time. I found that the charger circuit might not work well then.


I show the charging currents this time. The initial currents were alternative. 

The CH1 wave form was 0 to 188mA, 188 to 324mA, and 0 to drop. The mean value is 200mA. The frequency was 22Hz. It lasted 10 minutes.

The CH2 was normal rectangular shape at 40Hz. The duty of on/off was 15/8.6ms.  It lasted 15 minutes.

Good charger can charge even deteriorating batteries, I think. One has to confirm that a charger can charge deteriorating batteries or not. But to confirm it, one has to prepare deteriorated sample at first.

Thursday, November 24, 2016

Deteriorated NiCd battery for wireless XBee power suppy

#03 BAT has also dropped. I measured the individual battery voltage by DMM PC510 at 21:02 Nov 23.
NiCd1: 1.253V
NiCd2: 0.049V

The dropping chart is shown as below.

The both batteries duration term is  16/10/26 16:15 through 16/11/23 21:00. The duration time was 28 days 4 hours 45 minutes. NiCd2 might be deteriorated, but the CH2 circuit of my charger was not improved then.

I tried charging these ones, and show the charging current chart.

The initial charging current of NiCd2 is 50mA only in spite of empty. I set NiCd1 in the CH2 battery holder after 0 am. And the charging current exceeded 70mA at instant, but stopped charging at once.

I will not use NiCd2 for wireless XBee power supply. I also confirmed that the charged pair of NiCd1 and NiCd2 did not start GE digital camera A1455.