Hi I have attempted an upgrade to my E-bike.
I am trying to run two 48v batteries in series - my thinking was to try and increase top speed.
The set up I have is -
The bms in battery 1 seems to keep shutting off battery 1 - I cant work out why ?
I know there isnt much detail in the image above but is there anything Im doing which is obviously wrong ?
Im only a tinkerer so Im hoping Ive made a silly (but simple) mistake.
Additional information -
1 - The kits were originally two 48v 1000 w motor kits - they worked fine (together on the same bike but individually ie two of everything one on the front wheel and the other on the rear wheel.)
2 - I bought 2 X new 96v 1000w controllers ( that is what I ordered ) but the label on the outside states 96v 1500W - I have wired them in as per the diagram.
3 - The whole thing works fine unless i ask for too much throttle then battery 1 cuts out.
4 - I have run the two batteries on just the rear kit (disconnected the power cables for the controller for the front wheel) and it still cuts Batt 1 out although not as quickly.
5 - MY no load test allows me to go WOT without Batt 1 cutting out - although amps are lower.
6 - The reverse biased diodes are an attempt to protect the batteries from each other.
7 - A 10amp fuse blows quickly a 15 amp doesnt last much longer - the 30 amp hasnt blown yet.
Im hoping you guys might point me in the right direction as to what to do next ? I have a new BMS with a 40amp rating but im not sure now if the bms is dropping battery 1 out because of amps or something else ?
Any thoughts would be much appreciated.
Thanks
I am trying to run two 48v batteries in series - my thinking was to try and increase top speed.
The set up I have is -
The bms in battery 1 seems to keep shutting off battery 1 - I cant work out why ?
I know there isnt much detail in the image above but is there anything Im doing which is obviously wrong ?
Im only a tinkerer so Im hoping Ive made a silly (but simple) mistake.
Additional information -
1 - The kits were originally two 48v 1000 w motor kits - they worked fine (together on the same bike but individually ie two of everything one on the front wheel and the other on the rear wheel.)
2 - I bought 2 X new 96v 1000w controllers ( that is what I ordered ) but the label on the outside states 96v 1500W - I have wired them in as per the diagram.
3 - The whole thing works fine unless i ask for too much throttle then battery 1 cuts out.
4 - I have run the two batteries on just the rear kit (disconnected the power cables for the controller for the front wheel) and it still cuts Batt 1 out although not as quickly.
5 - MY no load test allows me to go WOT without Batt 1 cutting out - although amps are lower.
6 - The reverse biased diodes are an attempt to protect the batteries from each other.
7 - A 10amp fuse blows quickly a 15 amp doesnt last much longer - the 30 amp hasnt blown yet.
Im hoping you guys might point me in the right direction as to what to do next ? I have a new BMS with a 40amp rating but im not sure now if the bms is dropping battery 1 out because of amps or something else ?
Any thoughts would be much appreciated.
Thanks
