Electric Vehicle Manufacturers Introduces The Correct Maintenance Method Of Batteries


Posted October 21, 2020 by taizhousuqier

The Fast Sport Electric Motorbike manufacturers introduce the brake classification of electric vehicles: It can be roughly divided into holding brake, lifting brake, drum brake, and disc brake.
 
Electric Vehicle Manufacturers introduce why the batteries of electric vehicles are deformed.

The deformation of an electric vehicle battery is not sudden but often has a process. When the battery of an electric vehicle is charged to 80% of its capacity, it enters the high-voltage charging area. At this time, oxygen first precipitates on the positive plate, which passes through the holes in the separator and reaches the negative electrode. Oxygen reactivation reaction is carried out on the negative plate: 2Pb+O2 (oxygen) =2PbO+Q (heat) PbO+H2SO4=PbSO4+H2O+Q (heat). Heat is generated during the reaction. When the charging capacity reaches 90%, the oxygen generation speed increases and the negative electrode begins to generate hydrogen. The increase of a large amount of gas makes the internal pressure of the battery exceed the valve pressure, the safety valve opens, and the gas escapes, finally showing water loss. 2H2O=2H2↑ +O2↑ . With the increase of cycle times of the battery, the moisture gradually decreases, and the battery is easy to deform. Causes the battery to deform as follows:

1. the oxygen channel becomes unblocked, and the oxidation produced by the positive electrode can easily reach the negative electrode through the channel;  


2. The heat capacity is reduced, and the largest heat capacity in the battery is water. After water loss, the heat capacity of the battery is greatly reduced, and the generated heat makes the battery temperature rise rapidly;  

3. Due to shrinkage of superfine glass fiber separator in the battery after a water loss, the adhesion between the separator and positive and negative plates becomes worse, the internal resistance increases, and the calorific value increases during charging and discharging. After the above process, the heat generated in the battery can only be dissipated through the battery slot. If the heat dissipation is less than the calorific value, the temperature rises. With the increase of temperature, the overpotential of battery gas evolution decreases, and the gas evolution increases. A large amount of oxidation at the anode passes through the channel and reacts on the surface of the cathode, giving off a large amount of heat, which makes the temperature rise rapidly and forms a vicious circle, namely the so-called thermal runaway.


The above contents are organized and shared by Sport High Power E-Bike Factory, hoping to help people in need.
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Issued By taizhousuqier
Country China
Categories Accounting , Affiliate Program , Architecture
Last Updated October 21, 2020