John Manning

Sorry, some info did not get transferred to the new thread. The battery is a LiPo type and the battery box has a switch which is in the negative lead just before the output socket. The web site calls it Li Ion (http://www.bmsbattery.com/36v/522-bottle-ebike-battery.html). The charger circuit appears to charge several groups of cells as in a series/parallel arrangement. Regards JohnM

I have purchased from BMS battery in china a bike electrification kit. The battery pack is a 36v 10Ahr unit, I have charged it ,I think, for 36hrs. The battery level indicator does not light and there is no output, until I plug in the energized charger 42v output, then I get 41.6v at he output. I have opened the unit up and across the battery pack is 41.6 volts. I can find this voltage on the bms unit. The unit does not match the one that I can find on the BMS website (small letters for battery management system, large letters for the Chinese manufacturer.) I started this thread in "introduce yourself" but I think it more appropriate here. Any ideas would be most welcome as without the high current source I can't check the rest of the conversion. Regards John M

Good guess but unfortunately wrong. the battery is 36V 10Ahr. The switch on the case only works the negative lead to the external socket. The voltage from the charger lifts the electronic lock and allows the battery voltage 41.6v to appear at the output. It certainly gives the idea of not being turned on, but I have tested inside the case and between the battery and the on/off switch. Is there another switch? I have not seen one. The other difficulty is that the BMS on the battery pack is different to the one on the web site. Many thanks for your reply. I shall try to find a proper thread for this discussion. John M

Hi, I am John, a long time cyclist and bad speller. I live in the middle of Nottinghamshire and have some how got the project of electrifying my Uncle's Pashley tricycle. It is a vertical challenge because the trike is little bigger than a child's machine. I have got a BMS battery kit and it is fitting OK if slowly. The biggest problem is with the battery pack as it seems to be charged but gives no output unless the charger is plugged in. Any ideas will be helpful. I could short out the protection circuits inside the battery pack! regards John