Circuit diagram of 7.4V lithium battery protection board:
If it is a single-cell battery, you can choose single-cell protection that meets to the technical requirements of this type of protection. The board is common in the market and is cheap, if two or more batteries are connected in series, use two or more batteries in series protection boards, or add one protection board to each battery. If customer wants to change the overcurrent protection value or short circuit protection, there are two methods: 1. Add a protection circuit. Use LM317, LM393 together with resistors and capacitors to form an overcurrent protection circuit. that the overcurrent value can change the resistor size within a certain range. It can be modified, but the disadvantage is that the circuit is awkward and takes up a lot of space.
"Lithium battery" is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses non-aqueous electrolyte solution. Lithium metal batteries were first proposed and studied by Gilbert N. Lewis in 1912. In the 1970s, M. S. Whittingham proposed and began studying lithium-ion batteries. Since the chemical properties of lithium metal are very active, the processing, storage and use of lithium metal are subject to very high environmental requirements. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have now become mainstream.