Drive conversion circuit, system, charging control method, device, vehicle, and medium
By designing inverter conversion circuits and switching circuits, the integration of motor drive system and charging/discharging system was achieved, solving the problems of complex circuit structure and high cost, and providing a flexible solution for switching motor drive and charging modes.
WO2026012102A1PCT designated stage Publication Date: 2026-01-15BYD CO LTD
Patent Information
- Application Number
- PCT/CN2025/102474
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-07-09
- Filing Date
- 2025-06-20
- Publication Date
- 2026-01-15
AI Technical Summary
Technical Problem
The existing electric vehicle's motor drive system and charging/discharging system are designed independently, resulting in complex circuit structures and high costs.
Method used
The drive conversion circuit, which employs an inverter conversion circuit and a switching circuit, switches between motor drive and charging modes by controlling the on/off state of the switch and the bridge arm, including drive control mode, direct charging mode, boost charging mode and buck charging mode.
Benefits of technology
It simplifies the circuit structure, reduces costs, and can meet different charging needs, enabling flexible switching between motor drive and charging functions.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN2025102474_15012026_PF_FP_ABST
Abstract
A drive conversion circuit, a system, a charging control method, a device, a vehicle, and a medium. The drive conversion circuit comprises an inverter conversion circuit and a switching circuit. The inverter conversion circuit comprises bridge arms and motor windings (L1); each bridge arm comprises an upper bridge transistor (T1) and a lower bridge transistor (T2), wherein one end of the upper bridge transistor (T1) is a first positive connection terminal (V1+), and one end of the lower bridge transistor (T2) is a negative connection terminal (V-); the midpoint of each bridge arm is connected to a first end of the corresponding motor winding (L1), and a second end of said motor winding (L1) is a second positive connection terminal (V2+); the first positive connection terminal (V1+) is connected to a positive electrode of a power battery (1) by means of a first switch (K1) and is connected to a positive electrode of a charging device (2) by means of a third switch (K3); the negative connection terminal (V-) is connected to a negative electrode of the power battery (1) by means of a second switch (K2) and is connected to a negative electrode of the charging device (2) by means of a fourth switch (K4); and the second positive connection terminal (V2+) is connected to the positive electrode of the power battery (1) by means of a fifth switch (K5) and is connected to the positive electrode of the charging device (2) by means of a sixth switch (K6).
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Citation Information
Patent Citations
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