Power supply circuit of electric vehicle controller

Abstract

The invention relates to the technical field of an electric vehicle control system, and specifically relates to a power supply circuit of an electric vehicle controller. The power supply circuit of the electric vehicle controller, through a key switch signal end, outputs a key switch signal to a master control unit (MCU) so as to control wakening and switching of the MCU; furthermore, through arrangement of a reversal connection protection unit, reversal connection protection is provided; through arrangement of a surge voltage protection unit, surge voltage protection is provided; and furthermore, through arrangement of a MOS transistor with a freewheeling diode, reversal connection protection and turning-off control of a driving power processing circuit are realized, and inductive load turning-off surge voltages are released to a battery. Therefore, various functions and safety needs of vehicle control of an electric vehicle are taken into full consideration, thus forceful technical support is provided for improvement of the reliability and stability of the electric vehicle controller.

Description

Technical field [0001] The invention relates to the technical field of electric vehicle control systems, in particular to a power supply circuit of an electric vehicle controller. Background technique [0002] Electric vehicles have attracted more and more attention due to their advantages such as pollution-free, low noise, simple structure, convenient maintenance, high energy conversion efficiency and smoothing the peak-to-valley difference of the power grid. Electric vehicle vehicle controller (Vehicle Controller) is the core component of the electric vehicle control system. It plays a role in the normal driving of electric vehicles, regenerative energy recovery, network management, fault diagnosis and processing, and vehicle status and monitoring. The key role is that its performance is directly related to the overall performance of the electric vehicle, and whether the power supply design in the vehicle controller is reasonable is directly related to whether the vehicle contr...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, in the design of the electric vehicle controller power supply circuit, an isolated DC / DC power module is usually used to provide a 5V working power supply. This design has the following defects: (1), the isolated DC / DC power module is very There are few automotive-grade products; (2) It is difficult to sleep and wake up the isolated DC / DC power module; (3), the static power consumption of the isolated DC / DC power module is too large: (4), the cost is high; (5), although the use In order to isolate the DC / DC module, it is difficult to achieve the isolation effect in the design of the power supply due to the grounding of the entire vehicle circuit

In terms of the drive power processing circuit, the problem of power supply shutdown and inductive load shutdown surge voltage release is not considered, so it is difficult to meet the needs of the vehicle controller

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