A protection circuit for lithium iron phosphate battery and its application method

Abstract

The invention discloses a protection circuit for a lithium iron phosphate battery, comprising a control chip U1, a battery pack, an equalization module, an oscillation module, a switch module, a short circuit module and a discharge lock module, all modules are connected to the control chip U1, and the control chip Controlled by U1. A protection circuit of a lithium iron phosphate battery and an application method thereof of the present invention control all MOS tubes of the entire circuit through the control chip U1, monitor the circuit conditions in real time, and are interlocking to realize integrated overcharge protection, overcharge protection, and overcharge protection. Discharge protection, discharge over-current or short-circuit protection, and charging over-current protection are implemented in one circuit, and the structure is simple, easy to use, and easy to maintain.

Description

technical field [0001] The invention belongs to the technical field of battery protection circuits, and in particular relates to a protection circuit of a lithium iron phosphate battery and an application method thereof. Background technique [0002] Automobile new energy lithium iron phosphate battery has excellent performance. Compared with ordinary lead-acid batteries, the voltage will decrease as the capacity decreases. Therefore, the ignition system of the vehicle can always maintain a higher and more stable voltage, so that the ignition of the spark plug is always Keep it in tip top shape. The working voltage of lithium iron phosphate battery is higher than that of ordinary lead-acid battery, and it has stable and extremely fast charging and discharging capabilities. When the spark plug discharges the battery, it can generate an arc larger than that of the lead-acid battery, so that the car can be aligned at high speed in each cylinder. The fuel can be completely burn...

AI Technical Summary

Problems solved by technology

[0003] Because it is used in automobiles, in order to ensure its safety and continuous operation, more and more attention is paid to the protection of batteries. At this stage, most of them use ordinary circuit protection modes to protect batteries. Once a circuit short circuit occurs, it will not be able to Excavating in time will cause the battery to burn out. In severe cases, the vehicle may spontaneously ignite. Or it will directly stop the power supply to the spark plug, causing the car to die directly. If such an accident occurs during normal driving, it may not be possible to stop the vehicle in time. location, resulting in traffic jams

[0004] At the same time, the existing battery protection circuits are relatively single, and multiple protection circuits need to be equipped with multiple circuit protection boards, which is inconvenient for maintenance and also makes the battery more bloated

Images