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News Item

Everything you need to know about Lithium-ion Battery

April 21, 2021

Battery life is one of the biggest considerations. Along with range and fear of running out of power mid-journey, known as range anxiety. The way electric battery might degrade over time is a big barrier to EV ownership. Like any battery, including mobile phone or laptop, batteries in electric cars will lose some of their capacity over extended use. Almost all the batteries in electric cars are of the lithium ion variety. These batteries undergo ‘cycles’ of discharge and charge that occur when driving and ‘charge’. Over time these cycles take a toll in terms of how much charge the battery can hold.  As counter intuitive as it might sound, keeping electric car fully charged can actually damage battery. That’s why some electric cars stop charging when they reach capacity. Equally, discharging an electric car battery to empty isn’t a good idea. Last 20% of a battery takes longer than the first 80% to charge. Another factor is temperature. Extreme cold or heat can negatively affect car’s battery and therefore the range. Most manufacturers have a five to eight-year warranty on their battery. However the current prediction is EV battery will last from ten to twenty years before require replacing.

How a battery car electric motor works is suprisingly simple. The battery connects to one or more electric motors which drive the wheels. When you press the accelerator the car instantly feeds power to the motor, which gradually consumes energy stored in the batteries. Electric motors also work as generators, so when you take your foot off the throttle the cars begins to slow down by converting ots forward motion back into electricty - this happens more strongly   if you hit the brakes. This regenerative braking recovers energy that would otherwise be lost, storing it in the battery again and so improving the EV range. The manufacturers of batteries for electric cars go to great lengths to make sure EV batteries are safe, fitting smart management systems to prevent overheating and other problems. Batteries do get warm as they charge and discharge, but cars are designed to keep them cool - high performanc EV's sometimes have liquid cooling systems to help.

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