If on the other hand its not the controller that pops but is instead the BMS, then IIRC you’ll need to plug the battery back into a live charger to get it to reset to normal. Cycling the controller (display) power will bring it back. In that instance, voltage sag could take your battery voltage down to the point where your controller hits Low Voltage Cutoff and shuts the bike down. The only time it can affect your riding is if say you have drained your battery down low and you decide to ride up a steep hill under power. Unless you are draining the battery down low – which on general principles you should avoid – sag has no ill effect that you can do anything about. But, by and large, sag is just an item of passing interest. The more cells and cell groups you spread the load out over, the less sag. Minimizing sag is one of the things you gain when you do big custom batteries. Voltage sag like you describe is completely normal. With a 100% charge voltage of 67.2 volts, when you have one of these you are getting into high voltage territory Yup. Take a guess what you are supposed to do to see the 52-volt battery charge chart.
A ’52v’ battery tops out at 58.8v, so it essentially lets you use a 48v system for a longer time at higher voltage levels that it is already designed to utilize. 52v batteries will work on systems designed for 48v, and why is easier to understand when you become aware that a ’48v’ battery really tops out at over 54 volts.
The next battery voltage is 52v and very common. Click on the image above to be taken to the actual 48-volt battery charge chart. These batteries are fully charged at 54.6 volts. Click on the image above to be taken to the actual 36-volt battery charge chart. A 36v battery is actually fully charged when it is at 42.0 volts. Note that its called ’36 volt’ but really that is the ‘nominal’ value. Generally this is the lowest voltage you will find on a modern, commercial ebike. The first link is to the lowest voltage: 36v. Here for the first time are direct links to the charts on a normal web page.
I built them using Google Sheets, so they are not web pages, which I suppose has kept them from being widely linked in search engine results when people are looking at such things. They’ve become a fairly common link to help folks out on various Facebook groups who use these battery voltages in their ebikes.
36 volt lithium battery series#
Quite some time ago, I produced a series of charge status charts for a variety of common lithium-ion battery voltages.
36 volt lithium battery how to#
Use these and teach yourself how to read the voltage gauge on your display screen. Bottom line: imperfect charts like this are still good baseline references. Remember, ALL numeric charts show ballpark values that may be numerically correct, but no generic chart can match your individual cell characteristics, your pack’s age or its chemistry.
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