We use the same spec batteries in our bikes that Tesla uses. It is a Samsung 18650 cell. The lithium ion battery has been around for quite some time but there have been three major problems in the past.
Firstly, the price. Most batteries are made in China and change hands and increase in price several times before they get to the consumer. Our partnership with the Turnlife factory has enabled us to have custom batteries made at way better prices. We have essentially cut out the middle man.
Secondly, lack of options. When we started building electric bikes, we were using overpriced generic hobby shop batteries that weren’t able to meet our needs. When we found something that could deliver the power we needed, it would not fit where we needed it to go.
Thirdly, the battery management system. There is very powerful chemistry inside lithium ion batteries. It has to be managed correctly or else it will cause fires and catastrophic failures. When you discharge and charge lithium batteries, they heat up. This can cause thermal run away. You have to have a very precise BMS that is designed for the charger, the battery and it’s application to prevent this from happening.
These are no longer problems for us.
I am a fireman by trade, I got into E bikes about 4 years ago with a friend after we saw one that a hobbyist had built. We loved the idea and gave it a go. We have learned and spent a lot along the way.
We knew nothing about bikes or batteries when we started our journey. I am very impressed with your guys progress and openness about your designs.
Our websites are:
www.turnlife.com and electricbikecompany.com take a look at both and we can talk more