What are the reasons for the aging of car batteries?

We often drives, we also need to know the various parts of the car. If the car can't catch fire, then checking the battery is the first thing to do. Many times it is caused by the aging of the battery. Talk about the reasons for the aging of car batteries.

Car battery aging, there are generally several reasons:

1. Loss of electricity

"Debt" is a phenomenon that destroys the coating of the battery plate caused by the excessive discharge of the battery when the battery is low. The working voltage of any on-board electrical appliance has a standard range. If the electrical appliance exceeds this range, the electrical appliance is easy to be short-circuited or even burned. Below this range, the electrical appliance cannot start or work normally, and even affects the service life. The battery capacity drop will cause the battery voltage to be insufficient (undervoltage). If the voltage is insufficient, the basic voltage supply of the vehicle electrical equipment cannot be effectively satisfied. When the voltage drops, the user still uses the electric vehicle, and the battery cannot provide the normal voltage. As a result of the load of the vehicle-mounted electrical appliances, the undervoltage of the battery will be “depleted”, and the frequent “debt-loss” will gradually peel off the lead layer of the battery plate until the plate is damaged.

2, overcharge

"Overcharge" is the first reason for the charger. During the discharge of the battery, the voltage will gradually decrease. When the battery is charged again, the red light of the charger will light up, indicating that when the charging is in progress, when the energy is continuously input into the battery, the voltage will continue to rise until it is close to or equal to The charger green light will illuminate when charging voltage, at this time, charging stops or trickle charging. If the voltage component of the charger fails, the charging will not stop, the charging current will be input into the battery without interruption, and the voltage will increase continuously. As a result of the voltage increase, the thermal reaction of the electrolyte will be aggravated, and the battery casing will be deformed. Expansion), and the battery is charged.

3, plate vulcanization

The reason for the formation of lead sulfate is that the lead sulfate particles are dissolved in the electrolyte when they are excessively discharged or discharged for a long time, and are saturated, and the lead sulfates recrystallize at low temperatures, and the lead sulfate in the crystal is precipitated. In this way, the particles which are once precipitated grow and develop again and again due to temperature fluctuations, and the crystal grains are enlarged. This lead sulfate has poor conductivity, large electrical resistance, low solubility and dissolution rate, and difficulty in recovery during charging. Therefore, it is a cause of a decrease in capacity and a shortened life. Vulcanization is the main problem of battery capacity reduction, but the high current damage battery plate is the crux of the electric vehicle battery capacity reduction.

4. Large current discharge caused by starting, accelerating and overloading

The instantaneous current of the starting and accelerating of the electric vehicle is very large. Because the instantaneous current is too large, the electrolysis reaction increases sharply, and the coating of the electrode plate is bound to be affected to some extent. The lead layer powder of the electrode plate will gradually fall off due to the instantaneous high current pulling. The electrolyte will be black (caused by lead powder) and the battery will be scrapped. Overload is the overload of the electric vehicle during driving, such as excessive load, manned, etc., overload will increase the battery discharge load, long-term high-current discharge, will directly affect the plate coating, speed up the process of plate softening. There is also a bad road condition that will make the electric car brake and start. Such as potholes, red lights, roadblocks, and so on. These are all factors that cause large current discharges.

5, water loss

"Water loss" is one of the basic reasons for the reduction in battery capacity. Most of the electric vehicles are maintenance-free lead-acid batteries. Many users will say that the batteries are sealed and maintenance-free. Why is there a phenomenon of “water loss”? The reason is very simple. Water is participating in battery electrolysis. An important component of the reaction, once the battery is overcharged, discharged with a large current, increased internal resistance, short circuit, etc., it is easy to generate heat and form water vapor. The water vapor will be mostly retained in the sealed battery case, but there are also poles. A small part will be lost (determined by the density of the battery case material), and over time, the battery will be in a "water loss" state.

In addition to the main causes of battery damage, battery quality, plate loss, electrolyte leakage, damage to the housing, battery terminal breakage, etc. are also the cause of battery damage, so it is best to choose high quality when selecting the battery. Good word of mouth, a good battery can help you go further and make your electric car safer and more secure.

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