Insulation fault detection system for pure electric passenger car

Abstract

The invention discloses an insulation fault detection system for a pure electric passenger car, and the system comprises an electricity utilization load and cable insulation fault solving module which is composed of a preliminary insulation fault judgment module and a specific insulation fault judgment module; a power distribution cabinet insulation fault solving module which is composed of a power battery junction box internal insulation fault judgment module, an all-in-one power distribution cabinet insulation fault judgment module and a cable insulation fault judgment module between a junction box and an all-in-one power distribution cabinet; and a power battery pack insulation fault solving module which is composed of a power battery pack insulation resistance value measuring module and a power battery pack insulation fault judging module. The insulation fault detection system provided by the invention can perform omnibearing detection on the insulation faults of the pure electric passenger car from multiple aspects of electric load and cable insulation faults, power distribution cabinet insulation faults, power battery pack insulation faults and the like, and has the characteristics of wide detection range, high detection efficiency and accurate detection result.

Description

technical field [0001] The invention relates to the technical field of pure electric passenger cars, in particular to an insulation fault detection system for pure electric passenger cars. Background technique [0002] Pure electric buses use power batteries to drive the whole vehicle, and high-power equipment adopts B-level voltage. Class B voltage is not a safe voltage. If there is a problem with the insulation between its energized wire and the metal body, it will cause a leakage accident, also known as insulation failure. Insulation faults are very harmful and need to be dealt with in a timely and effective manner. Insulation faults are generally minor when they first appear. If they are not dealt with in a timely and effective manner and are allowed to exist, they may quickly escalate to serious insulation faults, causing the vehicle to lose power, causing damage to on-board equipment, and increasing the risk of electric shock for on-board personnel. [0003] At prese...

Images