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Single-cell lithium-ion battery charge and discharge management method, lithium ion battery precharge. The use of the lithium-ion battery charge and discharge management system can be used for current protection and discharge of current protection and discharge at charge and discharge. Monitor single-cell lithium ion battery voltage.
Regarding many consumers, it is not very understood that He Lithium Ion battery is precharged first. This article, Xiaobian will help you solve the problem. One-cell lithium-ion battery charge and discharge management method Lithium ion battery charge and discharge management system, the lithium ion battery is a single lithium ion battery, the system comprising a lithium ion battery charge and discharge management module, a lithium ion battery voltage overhang protection module, Lithium ion battery discharge overcurrent protection module and boost module.
Lithium-ion battery charge and discharge management system and method realize the application management of single-cell lithium-ion battery, overcoming the difference between multiple lithium-ion batteries in the prior art causes each lithium ion battery. Lithium-ion battery charge and discharge management module manages the charge and discharge process of the lithium-ion battery, which greatly enhances the life of the lithium-ion battery. At the same time, through the lithium ion battery voltage over-protection module, the lithium ion battery discharge overcurrent protection module protects the system, Make the system no need to add a lithium-ion battery protection board, so it has the advantages of safe and reliable, simple, low cost, easy to promote applications.
1 Under normal conditions of the external charging power supply, the lithium ion battery charge and discharge management module monitors the voltage of the voltage and the external charging power source of the lithium ion battery, when the lithium ion battery voltage is monitored When the lithium ion battery is charged, the lithium ion battery charging process is activated, and when the lithium ion battery voltage is monitored, the lithium ion battery is monitored, and the charging current is small, the lithium ion battery charging process is stopped, and the floating charge is prevented; 2 Under normal conditions of the external charging power supply, and in the lithium ion battery is already full, the lithium ion battery charge and discharge management system constantly monitors the voltage of the voltage of the lithium ion battery and the voltage of the external charging power source. If the lithium ion battery voltage is lowered When the lithium ion battery is charged, the lithium-ion battery charging process is restarted; 3 When the external charging power supply is abnormal, the lithium-ion battery charge and discharge management system monitors the voltage of the voltage of the lithium-ion battery and the external charging power supply. When the external charging power module voltage is not normal, the lithium-ion battery discharge process is activated; 4 lithium ion battery discharge overcurrent protection module monitors the operating current size in the lithium ion battery discharge circuit, when monitoring the lithium ion battery in the discharge loop When the discharge current is greater than the maximum discharge current threshold of the lithium ion battery, the lithium ion battery discharge circuit is disconnected; when the lithium ion battery discharge current is monitored in the discharge loop, the lithium ion battery discharge circuit is re-opened when the discharge circuit is lower than the maximum discharge current threshold.
; So repeated. 5 Lithium Ion Battery Voltage Extension Protection Module Monitor the current voltage size of the lithium ion battery, when monitoring the lithium ion battery voltage below the minimum discharge voltage threshold, disconnect the lithium ion battery discharge circuit, stop the lithium ion battery power supply; When the lithium ion battery voltage is higher than the lowest voltage threshold, the lithium-ion battery discharge circuit is reopened;. The use of lithium-ion battery precharges Since the lithium ion battery has a higher energy ratio, if it directly enters the fast power mode, it will damage the lithium ion battery, which affects the service life and may result in safety hazards.
When the lithium ion battery is charged, because the constant current is too large, it is possible to damage the battery, so precharge first, first allow the active material to activate, and then charge the battery. Although the current lithium-ion battery is built-in line protector during the design, it is usually very small, but if the battery is not pre-charge, it will bring a lot of hidden dangers, such as the protection board failure, long The self-discharge rate of the time is placed, etc., when the battery is overlapping, the recovery of the active material, this first with small current to 2.
5V to 3.0V, then convert to fast charge is necessary. Precharge cell can effectively solve the charging problem of over-discharge cells.
Therefore, experts recommend that consumers should correctly understand the importance of lithium-ion battery precharge, and the lithium-ion battery is rising during the design process, the purpose is there, so it is necessary to precharge the new battery, and choose The appropriate constant current value is charging for the battery. .
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