How to choose a good quality lithium battery charger

How to choose a good quality lithium battery charger?

1. Look at the charging speed of the charger

The common charger adopts constant current charging mode, and the charging speed is mainly related to the current provided by the charger. The higher the charging current is, the faster the charging speed is. The length of charging time depends not only on the charging speed, but also on the capacity of lithium battery.

It should be noted that the higher the charging current is, the higher the design quality of the internal system of the charger and lithium battery is required. In general, the higher the charging current is, the more heat may be generated during the charging process, and the more damage the performance of the battery may be. Poor quality chargers and batteries are prone to leakage and other safety problems when charging at high current and fast speed. 2. Look at the charging efficiency of the charger

The energy input to the lithium battery during charging is not all converted into the energy stored by the battery, but also the other part is used for the side reaction inside the battery and the heat in the charging process respectively. Therefore, the charging efficiency is always less than 100%.

The charging current should be controlled in a certain range during charging. If the charging current is too large or too small, the charging efficiency will be reduced. For the fast charger with high current, it is necessary to design the charging mode of lithium battery charger in order to improve the charging efficiency.

3. Look at the charger charging termination control

The charger with small current generally adopts time control mode. The higher the current provided by the charger, the more complex the control mode of charging termination, the higher the cost and price. For users, they should choose according to their own actual situation. If the battery capacity used is not very high, or the charging speed is not particularly important, you can choose a normal charger; If it is necessary to choose a high price fast charger, it is better to know more about the performance of charger and lithium battery.

4. Judge charger quality
Apple Cable
The good electric vehicle charger is to adopt the positive and negative pulse technology, which can effectively prevent, suppress and eliminate the curing and polarization of the battery. The new battery capacity can be kept stable for a long time; The capacity of the old battery which has been polarized and capacity decreased is restored, and the service life of the battery is effectively prolonged by 2-3 times. It has the functions of intelligent timing protection, temperature automatic compensation, instantaneous impact protection of power grid, super moisture-proof and corrosion resistance, etc.

5. Charging line
iPhone 12 charger port
The same is true for charging lines. It is better to choose the original or set of charging lines. If it is a similar charging line, it should be marked on it to avoid confusion.

Notes for lithium battery charging system

Input source: many applications use extremely cheap wall adapters as input power. The output voltage is mainly dependent on the AC input voltage and the load current from the wall adapter.

Constant current charging rate and accuracy: the topology selection of a particular application may be determined by the charging current. Many applications of constant current charging or multi battery charging adopt switch charging solution to achieve higher efficiency and avoid excessive heat generation.
Apple Cable
Stability accuracy of output voltage: in order to make full use of battery capacity, the output voltage voltage stabilization accuracy is very important. The small decrease of output voltage precision will also lead to a large reduction in the capacity of lithium battery. However, for safety and reliability reasons, the output voltage can not be set too high at will.

Battery temperature monitoring: generally, the temperature range of lithium-ion battery charging should be between 0 ℃ and 45 ℃. Charging the battery outside of this temperature range can cause the battery to overheat. During the charging cycle, the pressure inside the battery will also cause the battery to expand. Temperature is directly related to pressure.

iPhone 12 charger port


The above is the choice method of lithium battery charger. It is necessary to note that the charging process of lithium-ion battery is completely different from that of Ni Cd and Ni MH battery, which is a complex electrochemical reaction process. Therefore, special charger is needed for charging.

Lithium horse worker reminds you that you must not use a mixed charger to charge the battery.