Re-celling an NiMh battery for a Giant Lafree
http://www.pedelecs.co.uk/articles/42/1/Re-celling-an-NiMh-battery-for-a-Giant-Lafree/Page1.html
Russell Scott
By Russell Scott
Published on 12/11/2006
Here are the details for fitting a new cellpack into a battery for the Lafree Twist range, but generic advice is included for other makes. Since batteries continuously develop, changing the cellpack often increases the capacity, in this case from 6.5 Ah to 8 Ah, increasing the range by 23%. The replacement used here is a battery for the Windsor and Salisbury bike models sold by Powacycle. Their telephone number is 01279 821243.
WARNING. Re-celling should not be undertaken lightly. There are possible dangers both during and after the operation if the instructions given here are not followed closely. Care must be taken not to short adjacent cells together, and all possible points for subsequent shorting must be insulated adequately. As well as protecting the battery to ensure long life, the temperature sensors are essential safety features must be replaced in the same positions as previously occupied in the old cellpack.
Start by removing the pack from the Powacycle battery. Undo the four self tapping case screws, part the case halves and lift out the cellpack. Peel back the insulating card a little at the ends to reveal the terminations and unsolder the thick red and black wires, one at each end. Lift the tabs to avoid heating the cell walls. Now carefully lift the card insulation as needed and withdraw the temperature sensors. The wire entries are shown on the right. If necessary slit the card to gain access but take care not to short the ends of the cells together.
You can continue reading the rest of this article here
Article contribution by Flecc - you can visit my website here
Please note that following the above information is done at your own risk and Pedelecs.co.uk / Flecc cannot be held responsible for any damage or injury caused.
| | If you would like
the details for fitting a new cellpack into a battery for the Lafree
Twist range read on. Generic advice is included for other makes. |
Re-celling an NiMh battery
Here are the details for fitting a new cellpack into a battery for the Lafree Twist range, but generic advice is included for other makes. Since batteries continuously develop, changing the cellpack often increases the capacity, in this case from 6.5 Ah to 8 Ah, increasing the range by 23%. The replacement used here is a battery for the Windsor and Salisbury bike models sold by Powacycle. Their telephone number is 01279 821243.
WARNING. Re-celling should not be undertaken lightly. There are possible dangers both during and after the operation if the instructions given here are not followed closely. Care must be taken not to short adjacent cells together, and all possible points for subsequent shorting must be insulated adequately. As well as protecting the battery to ensure long life, the temperature sensors are essential safety features must be replaced in the same positions as previously occupied in the old cellpack.
Start by removing the pack from the Powacycle battery. Undo the four self tapping case screws, part the case halves and lift out the cellpack. Peel back the insulating card a little at the ends to reveal the terminations and unsolder the thick red and black wires, one at each end. Lift the tabs to avoid heating the cell walls. Now carefully lift the card insulation as needed and withdraw the temperature sensors. The wire entries are shown on the right. If necessary slit the card to gain access but take care not to short the ends of the cells together.
You can continue reading the rest of this article here
Article contribution by Flecc - you can visit my website here
Please note that following the above information is done at your own risk and Pedelecs.co.uk / Flecc cannot be held responsible for any damage or injury caused.