36V NiCd Drill battery charger

[Chris J]

Drill Battery question....

I want to replace an expensive broken Hilti charger with a standard charger. The charger is the Hilti C 7/36 ACS 7.2 - 36V NiCd NiMH Battery Charger. The drill uses 36V NiCd batteries

Would something like this replace the charger? If not any other options? I can find things which look hopeful - but they are in the US....

http://uk.rs-online.com/web/p/battery-pack-chargers/6117356/

http://www.batteryspace.com/smartcharger18awith3pinsplugfor36vnimhnicdpack-ullisted.aspx

 

[Benfool]

The first charger wont work, you need to be able to charge 30cells (30cells at 1.2v each gives 36v) and the maximum it provides would be 30v (1.2v*25).

I dont see why the second charger wouldn't work, assuming you can connect it to the battery pack okay. If I were you I would probably mutilate the old charger and add the connectors to the new one.

I'll have a look and see if I can find something in the UK that would be suitable that wont cost a fortune to import.

B

 

[Benfool]

Heres one from Hong Kong which should do the job with free shipping:

http://www.aliexpress.com/item/Sell-36V-2A-Smart-NIMH-Battery-Pack-Charger-Output-Voltage-36V-2A-Suit-Battery-36V-3/684682191.html

Happy to bodge together the connectors for you if you like.

B

 

[Chris J]

The batteries are 2.8Ah - will that be a problem with the AliExpress one?

i.e.

Charge battery pack: 28.8V-36V,24-30S, 4-20Ah

 

[Tangent_tracker]

Can the charger not be repaired? If you anywhere near South Manc land I will happily take a look for you

 

[Benfool]

I would of thought it'd be fine. Bit confused why there would be a capacity rating on the charger, all that should matter is that the voltage is correct and the current rating isn't too high (which at 0.7C is fine).

 

[Chris J]

Benfool - various chargers online appear to specify the min Ah rating of the batteries so Im inclined to think this is genuine concern....

Olly - Not anymore, down in Somerset. Will see if I can find anyone to look at the charger.

cheers

 

[MarkS]

It seems to suggest that the charge rate ought to be 0.1-0.5 C, but since it claims to be an NDV charger then I would think a higher charge rate would cause no problems. As Benfool says, a rate of just under 0.7 C ought to be fine...  :-\