Charging control method and system of vehicle-mounted battery and hybrid vehicle
By adjusting the engine speed and DC-DC converter status through the control unit, the battery charging process of the hybrid vehicle is optimized, the balance problem between the vehicle battery power and the engine fuel consumption is solved, and the coordination between sufficient power and low fuel consumption is achieved.
CN120756452APending Publication Date: 2025-10-10DONGFENG MOTOR GRP
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Patent Information
- Application Number
- CN202511019762.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-23
- Publication Date
- 2025-10-10
AI Technical Summary
Technical Problem
It is difficult for hybrid vehicles to strike a balance between sufficient battery power and low fuel consumption of the engine.
Method used
The control unit adjusts the engine speed and the working state of the DC-DC converter, optimizes the charging process of the auxiliary battery, and uses the interactive supplement of electricity from the photovoltaic power supply module and the power battery to achieve a dynamic balance of power.
Benefits of technology
It effectively improves the power reserve of the auxiliary battery, reduces the fuel consumption of the engine, and achieves a balance between sufficient power and low fuel consumption.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention provides a charging control method and system for a vehicle-mounted battery and a hybrid electric vehicle, and relates to the technical field of hybrid electric vehicles. According to the method, when the electric quantity of an auxiliary battery is lower than a first electric quantity threshold value and higher than a second electric quantity threshold value, and the electric quantity of the auxiliary battery is in a descending trend, or the electric quantity of the auxiliary battery is lower than the second electric quantity threshold value, a boost DC-DC converter is controlled to stop working; the auxiliary battery stops charging the power battery through the boosting direct current-direct current converter, and the engine is controlled to increase the rotating speed, so that the charging power of the accessory generator to the auxiliary battery is increased. If the electric quantity of the auxiliary battery is higher than a third electric quantity threshold value and the required generation power of the main generator is reduced, the engine is controlled to reduce the rotating speed so as to reduce the charging power of the accessory generator to the auxiliary battery, the third electric quantity threshold value is larger than the first electric quantity threshold value, and the hybrid vehicle can balance abundant electric quantity in the auxiliary battery; and the balance with low oil consumption of the engine is realized.
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