Lithium battery protection board composition and main function are introduced

Source: 2020 - 04 - 02 when he hits: time protection board composition and main functions of a protective plate, the composition of the lithium battery ( Rechargeable) Due to its characteristics to protect. Materials due to the lithium battery itself determines that it can't be overcharge, interpretation, over current, short circuit and super heat charge and discharge, so the lithium battery components of lithium-ion batteries is always with a delicate protection plate and current protector. Lithium battery protection function is usually done by protection of circuit board and PTC. The protection board is composed of electronic circuits, can be in - 40 ℃ ~ + 85 ℃ within the scope of real-time accurate monitoring of the battery voltage and current, charge and discharge circuit and real-time control current circuit on and off. PTC prevent battery seriously damaged at high temperatures. Protective plate usually include control IC, MOS switch, resistor, capacitor and auxiliary device NTC, ID, memory, etc. Including control IC control MOS switch in all the conduction under normal circumstances, make cells communicate with external circuit. When the battery voltage or circuit current exceed the specified value, it immediately ( Tens of milliseconds) Control the MOS switch is closed, in order to protect the safety of the battery. The NTC is the abbreviation of negative temperature coefficient, negative temperature coefficient. When the environment temperature, the resistance is reduced, the electrical equipment or charging equipment can response in time, control the internal interrupt, stop charging and discharging. ID memory memory is usually a single interface. ID is the abbreviation of identity, it means the identity. It storage battery type and production date or other information. Can play a traceability of the product and application restrictions. Second, the main purpose of the protection board general requirements at 25 ℃ ~ 85 ℃ control ( IC) Test battery voltage control and charge and discharge circuit of the working current, voltage, C - under normal conditions MOS switch tube conduction, the normal work of the battery and the protection of circuit board, when the battery voltage more than comparison circuit or circuit working current preset control IC, in 15 ~ 30 ms ( Different control integrated circuit and C - MOS have different response time) , CMOS close, close or rechargeable batteries discharge circuit, ensure the safety of the user and the battery.