Lithium battery pack pulse uniform-temperature self-heating system and method

The invention discloses a pulse uniform-temperature self-heating system and method for a lithium battery pack, and relates to the technical field of lithium battery low-temperature thermal management. A pulse uniform-temperature self-heating system for a lithium battery pack is composed of a plurality of battery monomers, a plurality of heating bypasses, a plurality of MOSFETs, a plurality of temperature sensors, a signal acquisition unit, a current sensor and a heating control unit. The built heating system does not depend on an external heat source and is easy to implement, due to the fact that a time-sharing sequential triggering mode is adopted, each heating battery and the adjacent battery work alternately in sequence, the high-voltage problem during large-scale grouped heating is avoided, the heating process is safe and efficient, the heating rate is larger than 8 DEG C/min, and the heating efficiency is improved by dynamically adjusting the duty ratio. The maximum temperature difference of the battery