A vehicle-mounted charger control method and related components
By actively reducing and gradually increasing the AC output voltage when the on-board charger is operating in V2L mode, the problem of sudden drop in DC bus voltage caused by excessive load power is solved, and the normal start-up and stable operation of the load are achieved.
CN116526616BActive Publication Date: 2026-07-03KOSTAL SHANGHAI ELECTROMECHANICAL CO LTD +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- KOSTAL SHANGHAI ELECTROMECHANICAL CO LTD
- Filing Date
- 2023-04-25
- Publication Date
- 2026-07-03
AI Technical Summary
Technical Problem
When the on-board charger is operating in V2L mode, excessive load power causes a sudden drop in DC bus voltage, which prevents the on-board charger from starting or stopping normally.
Method used
By actively reducing the AC output voltage of the on-board charger to the first target voltage and then gradually increasing it to the second target voltage after a preset time, the normal operation of the load is ensured.
Benefits of technology
This effectively avoids the problem of the load starting or stopping due to low DC bus voltage, ensuring that the on-board charger operates normally under high power load conditions.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN116526616B_ABST
Abstract
This invention discloses a control method and related components for an on-board charger, relating to the field of electric vehicles. When the on-board charger operates in V2L mode, the DC bus voltage of the on-board charger is acquired. To prevent the load from failing to start or stop normally due to excessively low DC bus voltage, when the DC bus voltage falls below a preset value, the AC output voltage of the on-board charger is actively reduced to a first AC output target voltage, thereby reducing the power demand of the load and allowing the on-board charger to maintain its output characteristics. After the AC output voltage of the on-board charger decreases and a preset derating time has elapsed, the DC bus voltage of the on-board charger gradually recovers. At this point, the AC output voltage of the on-board charger is then increased to a second AC output target voltage to ensure the normal power demand of the load.
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Citation Information
Patent Citations
Control method, system and device of vehicle-mounted converter and vehicle-mounted converter
CN112436768A
Vehicle buck power conversion control apparatus and method
US20140125120A1