Kellym
Joined: 10 Jan 2006
Posts: 1700
Location: Sun Lakes AZ
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 Posted: Wed Nov 04, 2020 4:34 pm Post subject: [SUSPECTED SPAM] Re: Ni-Cd Battery Safety Information Bulle |
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Well, those of us that had ni-cad powered drills and ni-cad powered
laptops got the joy of replacing the batteries when the recharge
capacity dropped down to 30%. At least lithium batteries suffer much
less of this effect.
On 11/4/2020 9:38 AM, Charlie England wrote:
| Quote: | On 11/4/2020 10:11 AM, Sebastien wrote:
> Interesting, I have never heard of this.
>
> /Aircraft Maintenance Manual Aircraft Parking Procedures usually
> require the physical disconnection of the aircraft batteries, and the
> periodic reconnection to carry out the parking or storage checks. A
> Type Certificate (TC) holder in conjunction with a battery
> manufacturer has identified that when a Nickel-Cadmium (Ni-Cd) battery
> is disconnected from the aircraft loads, it self-discharges due to an
> electrochemical phenomenon, thus inducing a reduction of battery
> capacity. When the battery is charged again from the aircraft, the
> battery does not recover 100% of its initial capacity. Therefore,
> after each cycle of battery self-discharge, the available battery
> capacity will decrease progressively./
Interesting, but isn't it more of academic than practical interest, for
most of us? I doubt that you could find a NiCd starting battery in a
homebuilt these days.
Charlie
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Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
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