EV Charging Current Feedback for Battery Overcharge Prevention
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Solution Overview
Problem
Current charging devices for electric vehicles cannot control the charging process in real time, leading to potential overcharging and reduced battery service life due to the inability to monitor and stop charging when the battery is fully charged.
Innovation Solution
A charging control method and device that acquires the charging current and electric quantity data value of the battery, using a correspondence relationship to control the charging process, including detection of a charging gun insertion and display of real-time data, allowing for precise control of the charging process to prevent overcharging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the charging device charges the battery continuously without real-time monitoring, then the charging speed is maintained, but the battery may be overcharged which reduces service life
Solution Approach 1:
The charging device obtains electric quantity data values from the battery in real time during charging, uses this feedback to determine charging status, and automatically stops charging when the battery is full, thus preventing overcharging while maintaining efficient charging speed
Solution Approach 2:
The system pre-establishes a correspondence relationship between charging current and electric quantity data values, allowing it to predict and control the charging process in advance, stopping before overcharging occurs
2Reliability
If the charging device stops charging immediately when fully charged, then battery service life is extended, but the charging process becomes complex requiring real-time data monitoring
Solution Approach 1:
The battery management system in the charging device automatically monitors its own charging status using pre-stored correspondence data, eliminating the need for complex external control systems while extending battery service life through automated stop timing
Solution Approach 2:
The system pre-stores the correspondence relationship between charging current and electric quantity data values, enabling simple real-time lookup and control decisions without complex calculations or external intervention
3Reliability
If the charging device monitors electric quantity data in real time, then overcharging is prevented, but the device complexity increases due to additional monitoring requirements
Solution Approach 1:
The charging device uses its own existing charging current data and pre-stored correspondence relationships to self-determine electric quantity data values, eliminating the need for separate complex monitoring hardware or external systems
Solution Approach 2:
The system uses the existing charging current information (which is already being measured for charging control) and creates a copied representation of electric quantity data through the correspondence relationship, avoiding the need for direct complex sensing of battery internal state
Data Source
AI summary
A charging control method, a charging control device and a charging device are disclosed, wherein the charging control method is applied to the charging device, and the charging device is used for charging an electric vehicle, while the method includes: acquiring a charging current of a battery of the electric vehicle during a charging process; acquiring an electric quantity data value of the battery on the basis of a charging current of the battery and a correspondence relationship between the charging current and the electric quantity data value of the battery; and controlling the charging process of the battery on the basis of the electric quantity data value. In this way, it is possible to control the charging process of the battery in a relatively simple manner to extend the service life of the battery.