Analysis on the working principle of lithium battery protection board

Lithium battery protection circuit design, lithium battery protection board principle, lithium battery protection circuit planning, lithium battery protection board principle. During the charging process of lithium batteries, each lithium battery has a balance circuit. When charging, the balance circuit of the lithium battery protection board is used to control the voltage of each battery to keep the state of each battery consistent and ensure the performance and life of the lithium battery. The protection circuit of the lithium battery is to ensure the safety of this overcharge and overdischarge and prevent its characteristics from deteriorating. Overcharge and overdischarge of lithium batteries will affect battery life. Pay attention to the charging voltage and charging current of the lithium battery. Then select the appropriate charging chip. Pay attention to prevent lithium battery overcharge, overdischarge, short circuit protection and other problems. The lithium battery protection circuit plan will pass a large number of tests in the future. When we plan to use lithium battery products, we must plan the protection circuit of the lithium battery, and only on this basis can we plan the charging circuit. Lithium batteries should be protected from over-voltage charging, over-voltage discharging, over-current protection, and short-circuit protection. So when we plan the lithium battery protection circuit, we must at least realize the above protection functions. The lithium battery protection board also has the function of protecting the battery and preventing battery charging. When the external power supply continues to quickly charge the battery, the lithium battery protection board will play a protective role. When the lithium battery is fully charged, the internal circuit of the lithium battery protection board will automatically cut off the external fast charging power supply. Therefore, external power cannot enter the battery. This is exactly how the lithium battery protection board protects the battery from overcharging. Lithium battery protection ICs are widely used in the planning of single lithium battery protection circuits due to their ultra-small size and few external equipment requirements. Lithium batteries (rechargeable) need to be protected due to their own characteristics. Because the material of the lithium battery itself determines that it cannot be overcharged, overdischarged, overcharged, short-circuited, charge-discharged under ultra-high temperature, the battery package of the lithium battery always follows a beautiful protection board and current safety device. The protection function of the lithium battery is usually completed by the cooperation of the protection circuit board, PTC and other current devices. The protection board is composed of electronic circuits, which can accurately monitor the voltage of the battery and the current of the charge and discharge circuit in the -40~+85 environment, and control the on and off of the current circuit in time. PTC prevents serious battery damage in high temperature environments. The lithium battery protection board is mainly composed of an IC tube and a MOS tube, and is used to protect the safety equipment of the lithium battery. Lithium batteries have a high discharge current, low resistance, long life, and no recall effect. They have been widely used. For example, lithium batteries are used to prevent overcharging, discharging, and short circuits, otherwise they will catch fire and kill defects such as blasting. Therefore, use a rechargeable lithium battery protection board to protect the safety of the battery. The above is the planning of the lithium battery protection circuit and the analysis of the principle of the lithium battery protection board. A special lithium battery protection board tester has appeared on the market, but the price is generally relatively high, and the IC welding test must be performed on the circuit board first. 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: Analyze the production methods of lithium batteries