An electric vehicle high-voltage active discharge circuit
By optimizing the dead time of the MCU and three-phase full-bridge circuit in electric vehicles, a narrow pulse current is generated for high-voltage bus capacitor discharge, which solves the problems of high cost, severe heat generation and instability in the existing technology, and realizes safe and stable high-voltage bus capacitor discharge.
CN224401395UActive Publication Date: 2026-06-23JIANG SU JIN MAI DIAN KONG KE JI YOU XIAN GONG SI
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANG SU JIN MAI DIAN KONG KE JI YOU XIAN GONG SI
- Filing Date
- 2025-06-16
- Publication Date
- 2026-06-23
Smart Images
Figure CN224401395U_ABST
Abstract
The utility model relates to the technical field of discharge circuit, concretely is a kind of electric vehicle high pressure initiative discharge circuit, comprising: MCU, upper bridge drive chip, lower bridge drive chip, three-phase full bridge circuit, high voltage bus capacitor, high voltage battery, bus voltage sampling module;The U-phase, V-phase, W-phase signal input end of three-phase full bridge circuit upper bridge is respectively connected the control signal output end of MCU through the upper bridge drive chip set;The U-phase, V-phase, W-phase signal input end of three-phase full bridge circuit lower bridge is respectively connected the control signal output end of MCU through the lower bridge drive chip set;The both ends of high voltage bus capacitor and high voltage battery are respectively connected on the voltage input end+ and voltage input end- of three-phase full bridge circuit;Bus voltage sampling module is fed back to the voltage value collected to MCU.The utility model compared with traditional electric vehicle high pressure initiative discharge scheme, with low cost, discharge effect stable and will not appear the problem of serious heating.
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