Charging method of car battery
Currently, there are three main types of car batteries: ordinary car batteries, dry-charged car batteries, and maintenance-free car batteries.
Ordinary car batteries: The electrodes of ordinary car batteries are composed of lead and lead oxide, and the electrolyte is an aqueous solution of sulfuric acid. Its main advantages are stable working voltage and low price. The disadvantages are low specific energy (ie the electromagnetic energy stored in 1kg car battery), short service life and frequent daily maintenance.
Dry-charged car battery: The full name is dry-charged lead-acid car battery. The main feature is that the negative plate has a high power storage capacity. Under thoroughly dry conditions, it can store power consumption within 2 years. . When using, just add electrolyte and wait for 20-30 minutes before use.
Maintenance-free car battery: Due to its own structural advantages, the maintenance-free car battery uses very little electrolyte and basically does not need to be supplemented with distilled water during use.
It also has the characteristics of impact resistance, heat resistance, small volume self-discharge, and generally long service life.
There are also two types of maintenance-free car batteries on the sales market: the first is to add electrolyte once at the time of purchase, and there is no need to maintain (add supplementary fluid) in future use; the second is The electrolyte is already added and sealed before leaving the factory, and the user cannot add replenishing fluid.
Charging method of constant voltage battery:
With the increase of DC voltage and decrease of current, the working voltage of battery charging and switching power supply remains stable Standards. Compared with the constant current battery charging method, the whole process of battery charging is closer to the battery charging curve. Fast charging with stable working voltage. Due to the low pre-charge potential of the battery, the current is large. With the development of battery charging, the current will gradually decrease, a simple automatic control system.
This battery charging method has very little electrolysis of water to prevent the battery from overcharging. However, in the early stage of battery charging, the current is too large, which has great harm to the service life of the battery, and it is easy to bend the electrodes of the battery and cause damage to the battery. Due to this defect, constant current source battery charging is rarely used, and can only be used when the battery charging voltage is low and the current is large. For example, during the entire car operation, the battery is charged with a constant current source battery.
Note that using the basic battery charging method will cost more to charge the battery, and the battery should be charged with a little less current (below 5a). You can't charge quickly, otherwise the battery will be generated and cause death. When the maintenance-free battery counter displays a bright or bright red message, the battery will not last long even if the battery is charged. At this time, the battery charging is only used as a first aid wave and becomes a false name. If there is a standard, the battery charging device has operating voltage characteristics and can be used for battery charging.
Constant current battery charging method:
The method of constant current battery charging to adjust the output voltage of the battery charging device or to change the battery series resistance. The control measures are simple, but because the working capacity of the rechargeable battery gradually decreases with the entire charging process, in the middle and later stages of the charging, the current is mainly used to electrolyze water, which causes too much steam and too much gas, so the ring battery charging method is often used.