Some techniques for charging electric car batteries

The battery life and safety of electric vehicles are the most concerned by consumers. At present, various types of electric vehicles are hot, but the after-sale maintenance and service aspects of the post-market still need to be improved. In the hot summer, electric vehicles can easily cause spontaneous combustion and even fire explosion if they are used improperly. Safety is worrying. In fact, as long as a certain degree of common sense of daily use, can avoid similar tragedies, so how do electric vehicles correctly master charging and maintenance methods?

First, protect the charger. The general instruction manual has instructions on the protection of the charger. Many users do not have the habit of reading the instructions. They often think of looking for the instructions after the problem. It is often too late, so it is very necessary to read the instructions first. In order to reduce costs, the current charger is basically not designed for high vibration resistance. In this way, the charger is generally not placed in the trunk and basket of an electric bicycle. In special cases, you must move the charger and pack it with foam to prevent vibration. After many chargers have been vibrated, their internal batteries will drift, causing the entire parameters to drift, causing the charging state to be abnormal. In addition, it is necessary to pay attention to maintaining the ventilation of the charger when charging, otherwise it not only affects the life of the charger, but also affects the heat drift and affects the charging state. This will damage the battery. Therefore, it is also very important to protect the charger.

Second, correctly grasp the charging time. Under normal driving conditions, if the indicator light of the electricity meter is red and yellow, it should be charged; If the yellow light is out and only the red light is on, stop running and charging as soon as possible, otherwise the battery will shorten its life because of excessive discharge. Some people are used to charging each time they go out. Sometimes they only run for a short period of time. This time, the charging time should not be too long. Otherwise, they will overcharge and cause the battery to heat up. Under normal circumstances, the average charging time of a car battery is about 10 hours. Excessive charging, excessive discharge, and insufficient charging will shorten the battery life. If the battery temperature exceeds 65 °C during the charging process, the charge should be stopped immediately.

Third, avoid the plug heating when charging. Relaxation of the power plug or charger output plug and oxidation of the contact surface will cause the plug to heat up. Excessive heating time will lead to short circuit or poor contact of the plug, damage the charger and battery, causing unnecessary losses to you. Therefore, if you find the above situation, you should remove the oxide or replace the plug-in in time.

Fourth, sun exposure is forbidden. The exposed battery will lose water due to increased internal pressure, causing the battery activity to decrease and accelerating the aging of the plate.

Fifth, charge every day. Even if your ability to continue is not long enough and can be used for two to three days at a time, it is recommended that you charge every day so that the battery is in a shallow cycle and the battery life is extended. Some early cell phone users thought that batteries were best to be recharged after basic use. This is not true. The memory efficiency of lead-acid batteries is not so strong. Frequent discharge of electricity has a greater impact on battery life. Most chargers may be 97 % to 99 % charged after the indicator lamp is changed to indicate full power. Although only 1 % to 3 % of the charge is undercharged, the impact on the renewal ability is almost negligible, but it will also form under-charging accumulation, so the battery will continue to float charging as much as possible after the battery is filled, which will also inhibit battery vulcanization. Good.

Finally, in the course of driving, we should try to avoid stepping on the acceleration and discharge of large current at the moment of travel. When an electric car is started, manned, and uphill, if it accelerates, it will form an instantaneous high current discharge. High current discharge can easily lead to lead sulfate crystallization, thus damaging the physical properties of the battery plate. If the speed suddenly decreases by dozens of kilometers during driving, be careful that it may be a problem with a certain group of batteries. It should be checked as soon as possible.

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