High voltage electric loop control device for electric automobile

Abstract

The invention discloses a high voltage electric loop control device for an electric automobile. The control device is characterized in that a high voltage loop on-off control unit and a high voltage loop state detection unit, the high voltage loop on-off control unit finishes on-off control of a pre-charging loop, a discharging loop, a slow-charging loop and a quick charging loop. The high voltage loop state detection unit detects high voltage, current, insulation resistance and relay state parameters. By means of the structure, a high voltage loop parameter collection harness is integrated in the device, the risk of electric shock caused by damage to the high voltage loop parameter collection harness which is arranged in a battery package or on an automobile body is reduced, and separation of high voltage signals and low voltage signals is achieved. Due to space limitation of the electric automobile or the battery package at present, multiple high voltage signal wires and low voltage signal wires are arranged together, separation of the high voltage signals and the low voltage signals cannot be achieved, and interference between the high voltage signals and the low voltage signals is reduced.

Description

technical field [0001] The invention relates to the field of high-voltage control of electric vehicles, in particular to a high-voltage circuit control device for electric vehicles. Background technique [0002] Electric vehicles include hybrid electric vehicles and pure electric vehicles. In electric vehicles, mechanical systems such as wheels, air compressors, steering pumps, and air-conditioning compressors originally driven by internal combustion engines need to be driven by high-power motors. These high-power motors require There is a high voltage power supply to provide electricity. The high-voltage circuit control device is an essential component of the electric vehicle to realize the on-off control of the high-voltage circuit and the detection of the parameters of the high-voltage circuit. [0003] The existing high-voltage electric control circuit is simple. Although it has the advantages of low overall manufacturing cost and convenient installation, the use of ord...

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Problems solved by technology

[0003] The existing high-voltage electric control circuit is simple. Although it has the advantages of low overall manufacturing cost and convenient installation, the use of ordinary industrial relays instead of special DC contactors for electric vehicles reduces the safety factor of electric vehicles; there is no need for high-voltage circuits. The device for detecting voltage, current, and insulation resistance cannot judge the state of the high-voltage circuit of the electric vehicle; at the same time, the existing control device does not have a relay state detection device, so it cannot judge the adhesion state of the relay

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