Analyze the charging methods of lead-acid batteries and lithium-ion batteries

Lead-acid batteries and lithium-ion batteries use different charging methods and charger logic, and they cannot be mixed and matched. Aiming at the charging methods of these two mainstream power batteries, Electronics summarizes as follows, hoping to help everyone; lead-acid battery charging methods; 1) Pulse charging is simple and economical. This method has a larger charging current and a fast charging speed. The disadvantage is that when the grid voltage fluctuates, the charging current also fluctuates. 2) Constant current charging. In order to prevent excessive temperature rise inside the lead-acid battery and excessive electrolyte loss, the charging current adjustment is relatively small and the charging time is longer. On the other hand, if the charging time is too long, overcharging will occur. In order to prevent the battery from being damaged due to overcharge, it is necessary to set up a separate overcharge detection or timing circuit. 3) Constant voltage charging theory and practice have proved that when the charging voltage is lower than the upper limit of the charging voltage (12V battery), constant voltage charging is safe. Even if the charging time is long, there is no danger. When necessary, the battery can also be floated. Work in. Lithium-ion battery charging is divided into two stages; first, constant current charging, that is, the current is constant, and the voltage of the lithium-ion battery gradually increases with the charging process. According to the above specifications, it is generally charged with a current of 0.2c (c is the nominal capacity and current of the battery, 0.2c is 200ma). When the battery voltage is close to the full voltage of 4.2v, the constant current charge will be changed to a constant voltage charge. This process is about five hours. Constant voltage charging, that is, a certain voltage, as the saturation of the wire deepens, the current gradually decreases. According to the specification, when the current drops to 0.01C, that is, 10mA, charging is deemed to be terminated. After this process and the constant current charging time are added, the total charging time should not exceed 8 hours. Therefore, there are two criteria for judging whether the charging of the UPS lithium-ion battery has reached saturation: the current is 0.01C, and the total duration does not exceed 8 hours. In other words, if the lithium-ion battery charging process still does not reach 0.01 after 8 hours C. Will be regarded as a non-conforming product. 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: Eight daily maintenance principles for electric vehicle batteries