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Solar power generation American university suggested that electric cars not fast charging method is used to charge

According to foreign media reports, the university of California, riverside, 加州大学河滨分校) The engineers said, solar energy, solar energy, commercial fast will make the electric car battery charging station at a high temperature, high resistance in the environment, and such an environment can lead to cell rupture, leakage and loss of storage capacity. In order to solve the problem, China solar power network, the researchers developed a method to recharge the battery under low temperature, thereby reducing the risk of catastrophic damage and storage capacity loss.

department of electrical and computer engineering professor Mihri Ozkan and Marlan and Rosemary Bourns college of engineering department of mechanical engineering professor Mrs Cengiz Ozkan led a team, the highway along the installation of fast charging pile for tesla motors panasonic NCR 18650 b cylindrical lithium-ion battery.

they also used the fast charging a battery internal resistance based algorithm, this algorithm can interfere with the flow of electrons. Battery internal resistance of the factors such as temperature, charging status, the battery life varies, in the process of charging, a high internal resistance will create problems.

the university of California, riverside, team way of charging the battery is an adaptive system that can learn by check when the battery internal resistance to the battery. When resistance effect, the charge way will stop work, so that the battery is not charging capacity loss.

in the first 13 time charge cycle, two kinds of rechargeable battery storage capacity to keep similar caused by technology. Then, fast charging technology will lead to faster, battery capacity attenuation after 40 time charge cycle, batteries can only keep 60% of the storage capacity. But, using the internal resistance for the battery charging mode, the 40th time charge loop, the capacity of the battery can still remain more than 80%.

keep has been showed that 80% of the capacity of rechargeable lithium ion battery has been achieved at the end of life, cannot be used for most applications. Fast charging technology used to charge the battery after charging 25 times to reach this state, solar portal, and internal resistance charging method is used to charge the battery after charging 36 times, to achieve this state.

what's worse, after 60 time charge cycle, fast charging method is used to charge the battery shell burst, the electrodes and the electrolyte will be exposed to air, increase the risk of fire or explosion. 60 c / 140 degrees high temperature may accelerate cell damage and the risk of fire/explosion, but charging internal resistance will result in battery temperature is lower, thus eliminating the damage.

so far, researchers have applied for patents for adaptive impedance fast charging algorithm, this algorithm may be licensed to battery and car maker. At the same time, the university of California, riverside, the commercial team make a proposal to minimize battery quick charging pile, recharged before its battery runs out, and prevent excessive charging.

, solar power grid

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