Do you know anything about the fundamental requirements of lithium-ion battery chargers?

In order to prevent overcharging of lithium-ion batteries, a protective circuit must be designed for lithium-ion batteries. The lithium-ion battery charger JC is suitable for single-cell and 2~4-cell battery packs. The basic requirements for lithium-ion battery chargers are as follows: ①It must be full when charging, and the termination charge voltage accuracy is required to be about ±1%; ②No outflow during the charging and discharging process, short circuit protection is required; ③The termination discharge voltage It is necessary to restrain the inheritance of discharge, and the accuracy of the termination discharge voltage should be controlled at ±3%; ④For the deeply discharged battery (not lower than the termination discharge voltage), pre-charge the battery with a small current method before charging; ⑤To ensure that the battery is not stable and reliable, take precautions The nuisance of transient voltage change should be designed with a delay circuit for overcharging, overdischarging, and overcurrent protection to prevent the transient nuisance from being constant; ⑥self-consumption of electricity (charging during charging and discharging) All devices should be in the power-on state) The power consumption of a single-cell battery charger is generally less than 10uA, and a multi-cell battery pack is generally about 20uA; when the discharge is terminated, it is in a blocked state, and generally consumes less than 2uA; ⑦The lithium-ion battery charger circuit is simple and has peripheral components. Small, small space, generally can be built in batteries or battery packs; ⑧The value of lithium-ion battery chargers is low. ⑨The factors that affect the safety and effective charging of lithium-ion batteries are voltage, current and temperature. Therefore, these three factors should be taken care of in the charger design. ⑩The lithium-ion battery charger should also have adaptive power path management results. When the power consumption of the system side exceeds the supply limit of the input power supply, it is guaranteed that the lithium-ion battery can actively start the discharge result and supply its required power to the system side. . How to charge lithium-ion batteries correctly? The suitable temperature for charging the lithium ion battery is 0~45℃. If charging at 0.5C, the 1C temperature rise can be set to 90℃. At this time, the charger operates at a temperature of 35℃, and it is best to charge the lithium ion battery. Therefore, the current for charging at a rate of 2 hours is the best. Lithium-ion battery is easy to activate, as long as 35 cycles of normal charge and discharge can activate the battery and restore the normal capacity. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: Do you know any safety hazards of iron-lithium ion batteries?