Quiet charger for 36V battery

[pn_day]

Dear all,

I have a 36V 20Ah battery which is still working (bought from BMSb a few years ago). I got 2 chargers with it, which both deliver approximately 2.5A at 36V (or 42V as it appears to be). They work well, but are very noisy - the small onboard fan spins up an creates quite a noise.
The chargers I have are similar to this link, with a UK plug on 1 end, and a 3 pin female IEC ?C13? plug on the other for connecting to the battery) https://bmsbattery.com/ebike-charger-ev-charger/23-alloy-shell-180w-lifepo4-li-ion-lead-acid-battery-ebike-charger-ecitypower-charger.html

I would like to get a charger without such a noisy fan for use at work - even if it will be lower power and therefore take longer to charge the battery.

Does anyone know of a suitable charger?

Also does anyone know of the pinouts to connect to the battery if I need to buy one without the correct IEC connector on the end?

Thanks in hope,
Phil

 

[wheeliepete]

Jimmy at Insat Int, the chap who does battery re-celling sells chargers.

https://www.ebay.co.uk/itm/King-Pan-Insat-Li-ion-Ebike-Battery-Chargers-29-4V-42-0V-54-6V-2A-84V-4A/331705055471?hash=item4d3b2978ef:m:m75XTR7nazgCxbCBoW-77mA

Same guy

https://ebikebatteries.co.uk/product/lithium-ion-battery-charger-2a-36v/

These are fanless chargers and they do get quite hot when charging.

 

[awol]

If it's only 2.5a I'm sure you could just remove the fan.
But something like this should do and is fanless.
https://www.ebay.co.uk/itm/42V-2A-Power-Adapter-Charger-Two-wheel-Balanced-for-36V-Li-ion-Lithium-Battery/323280977859?epid=675316974&hash=item4b450c3fc3:g:4ykAAOSwVttbD1md
If the battery connector is the big kettle style you can change the chargers plug for one of these like I did.
https://www.ebay.co.uk/itm/IEC-Female-Inline-Rewirable-Socket-Adapter-Plug-10A-Disco-Lights-Kettle-Lead/132688225015?hash=item1ee4d5a2f7:g:TKgAAOSwWOxbO3yO
To work out the pinout's I just used a multimeter on the battery's left+right pins. The middle pin is not used. Cut the charger plug off and line up the plug+socket and connect the red/black to the relevant sides.

 

[cwah]

I've been using gophert for few years now... Very reliable and absolutely silent:
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.co.uk/ulk/itm/141389291960

I liked them so much I bought 2

 

[pn_day]

Thanks all for the tips. Cheers