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  1. H

    Bafang BBS02 750W switching off intermittently

    It started when I was riding at full speed (24A current) by a very hot day (35°C) after the bike was left a full day under the sun. I switched off and on and the bike started again. I thought it was a temperature sensor that did cut the current because of excess heat. But after the...
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    Bigstone C300 LCD

    I am still riding a pretty old e-bike which uses a Bigstone C300 LCD display which needs to be changed. Apparently this item cannot be found any more in any store. Any idea about a compatible one ? Thanks much -Henri
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    How does a BMS work

    Where can I find reliable and precise information on how a BMS like this one is working: https://bmsbattery.com/bmspcm/323-16s-lifepo4-bms-battery-management-system-bms-pcm.html (ideally with circuit diagram) - What does it do during charge (it is recharging fist at CC then at CV and if yes how...
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    How to charge individually an LiFePO4 cell

    I know it needs to be charged at constant current first, up to a certain voltage level and then the charge has to be completed with a contant voltage cycle. My question: where can I find an affordable power supply able to provide constant current ? Thanks, -Henri
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    Issue with Headway 40152 battery pack

    I have just finished assembling a new battery pack for my e-bike. This is a pack of 16 Headway 40152 LiFePO4 cells of 15Ah with a 16S BMS from BMAbattery. Discharge Current : 30-60A. This issue: the pack doesn't behave like a LiFePO4 battery pack. Voltage drops progressively during the discharge...
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    Troubleshooting...

    I have a Bafang BPM2 48V500W with an S12S controller from BMSbattery and a S-LCD1 E display. Here is what happened (intermittently and then permanently). When riding, the bike would go full speed regardless of pedaling or not, and regardless of throttle (frightening!!). Only the brakes could...
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    Troubleshooting an e-bike kit that stopped working

    The e-bike kit that I mounted on my bike has been working fine for two weeks (220km). Today when I started up I heard strange vibrations and noise that disappeared as I increased speed. Then I slowed down, vibrations came up again. I stopped and couldn't resume. The motor wouldn't spin. Then I...
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    S12S undocumented connectors

    Does anybody have S12S (BMS Battery controller) complete specifications, especially about how speed control works ? Here is a copy of an email string with BMS Battery where my questions remain largely unanswered. Thanks. My initial question: Jack Do you know what is the usage of the two...
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    8 or 10 poles PAS

    Can somebody tell me about the difference in usage between a 8 poles PAS and a 10 pole PAS. My common sense would tell me that 10 is better than 8 but i may be wrong... Thanks, -Henri
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    e-Bike technology question from a dummy

    I am trying to understand e-bike technology before buying my first e-bike conversion kit. Can somebody point me in the right direction to get answers to the following questions: - What is the difference between a sine wave and square wave controller - What is a torque simulation controller and...
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