Analyze the correct charging method for lithium iron phosphate batteries

Lithium iron phosphate battery charging is divided into two stages: Lithium iron phosphate battery charging. jpg Constant current charging, that is, the current is constant, and the voltage of the lithium iron phosphate battery gradually increases with the charging process. According to the above specifications, it is generally charged with a current of 0.2C , When the battery voltage is close to the full voltage of 4.2V, change the constant current charging to constant voltage charging. This process takes about five hours. Constant voltage charging, that is, the voltage is constant, and the current gradually decreases as the saturation of the cell deepens. According to the specification, when the current is reduced to 0.01C or 10mA, the charging is considered to be terminated. After this process and the constant current charging time are added together, the total charging time should not exceed eight hours. The charging method of lithium iron phosphate batteries is different from that of ordinary lithium batteries. In recent years, portable electronic products are developing towards lightweight and ultra-miniaturization, and portable lithium iron phosphate batteries with excellent safety performance have begun to be used. 1. Some mobile phone chargers are protected. When the voltage of the lithium battery pack reaches 4.2 volts, the charging is stopped. The author's idea is to connect a lithium iron phosphate battery pack and the charger in series with a higher power When a little silicon diode (forward voltage drop is about 0.6 volts) is charged in this way, when the voltage of the lithium iron phosphate battery reaches 3.6 volts, plus the diode voltage drop is exactly 4.2 volts, it can also be tested by the charger and stop Recharge. 2. The protection circuit of the mobile phone battery is taken out and used for the charging protection of the lithium iron phosphate battery pack. It is also based on the above principle to connect a diode in series during charging, which plays a 4.2-volt protection purpose. 3. Considering that when single-cell batteries are charged in series, the inconsistency between battery packs will gradually increase. In order to ensure the service life of the battery, the only way to reduce the utilization rate of lithium battery packs and balance charging is effective to reduce the inconsistency of battery pack characteristics. In this way, the characteristics of the battery can be balanced, thereby increasing the utilization rate of the iron phosphate battery pack and significantly extending the life of the battery pack. 4. The temperature during charging of the lithium iron phosphate battery pack is preferably within 0-45°C. Such a temperature is more conducive to the activation of the chemical properties in the lithium battery pack and makes the charging efficiency higher. 5. Charging is an important step when using lithium batteries. Proper and reasonable charging is good for prolonging the life of the battery pack, and brutal charging will have a great impact on the battery life. Regarding the charger of the lithium iron phosphate battery pack, it is best to use the special charger equipped by the manufacturer. Do not use other chargers of other models or unsuitable charging voltages at will. Warm reminder: When using lithium iron phosphate batteries, pay attention to waterproof and dustproof, so there should be no water in the storage place, which will affect the performance and service life of the battery. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Do new energy vehicles use lithium batteries? What are the advantages of lithium batteries