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Method Discovered for Improving Fire Safety E-Bike Batteries

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CHICAGO, USA – Researchers of the Chicago College of Engineering (University of Illinois) have discovered a method which greatly improves the fire safety of Lithium-Ion batteries. This is good news for all sectors of the e-mobility industry, where fire safety is a major concern. As even Tesla is reportedly experimenting with this new method implementation chances increase.

Method Discovered for Improving Fire Safety E-Bike Batteries
Li-Ion batteries that catch fire produce their own oxygen. There’s now a method that blocks oxygen release. – Photo Bike Europe

This new method involves the wonder material Graphene as it is able to block the release of oxygen in case of a battery fire caused by thermal runaway. When this happens the battery’s cathode (usually lithium cobalt) decomposes and releases oxygen. When the oxygen mixes with flammable decomposed electrolyte under high enough heat, spontaneous combustion takes place.

Oxygen release

What the University researchers discovered is that when the cathode is covered with a wafer-thin (measured in nanometers) graphene layer, the release of oxygen will be effectively blocked.

Longer lifetime and higher long-term capacity

Lithium-Ion battery expert James Post argues “In addition to this, Graphene also offers a higher potential capacity and lifetime when the cathode and anode are covered with Graphene. The extremely high conductivity and reduced oxidizing of Graphene causes a much lower, long-term internal resistance and thus less heat losses. Lower heat means longer lifetime and lower internal resistance means higher long-term capacity longer lifetime and lower internal resistance means higher long-term capacity.”

More at: https://today.uic.edu/graphene-coating-could-help-prevent-lithium-battery-fires

Lectures on e-bike battery design

During Eurobike Academy, on September 6, 2019, Lithium-Ion battery expert James Post presents two lectures; on e-bike battery pack design and on e-bike battery safety monitoring. To reserve a free seat: email to ebikebatterysafety@gmail.com

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