Battery Charging Map Selection for Faster Safe Charging
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Solution Overview
Problem
Existing battery charging strategies are not optimal, resulting in slow charging speeds and long charging times due to suboptimal determination of charging rates based on temperature and state of charge.
Innovation Solution
A method that determines a target charging map from preconfigured maps based on the battery's temperature and state of charge at the charging start moment, using the highest charging rate or average charging rate within a specific SOC range to improve charging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single fixed charging map is used for battery charging, then the charging strategy is simple to implement, but the charging speed is slow and charging time is long
Solution Approach 1:
The patent divides the charging strategy into multiple discrete charging maps, each optimized for specific battery conditions (temperature ranges and SOC ranges). Instead of using a single fixed charging map, the system segments the charging process into different phases and selects appropriate maps based on real-time battery state, thereby improving charging speed while maintaining manageable complexity through structured organization.
Solution Approach 2:
The patent implements a dynamic charging strategy where the charging map is not fixed but changes based on real-time battery conditions. The system dynamically selects from multiple pre-configured charging maps by evaluating current temperature and SOC values, allowing the charging rate to adapt optimally to battery state throughout the charging process, thus resolving the contradiction between simplicity and performance.
2Loss of time
If the charging rate is increased to accelerate charging speed, then charging time is shortened, but battery safety risks increase due to temperature and state of charge variations
Solution Approach 1:
The patent applies local quality by creating different charging maps tailored to specific local conditions of battery temperature and SOC ranges. Each charging map contains optimized charging rates appropriate for its designated condition range, allowing the system to apply high charging rates only when conditions permit (im reducing charging time) while maintaining safety by using conservative rates when temperature or SOC levels require caution.
Solution Approach 2:
The patent changes the parameters of the charging strategy by using multiple charging maps with different charging rate parameters optimized for different battery states. The system selects and switches between maps with different parameters (charging rates) based on real-time temperature and SOC measurements, thereby achieving fast charging when safe and protective charging when conditions require, resolving the contradiction between speed and safety.
Data Source
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AI summary
This application provides a battery charging method and apparatus, which are applied to the field of battery technologies, to resolve problems of a low battery charging speed and long charging time. The method includes: obtaining a temperature of a battery and an initial state of charge SOC of the battery at a charging start moment; determining, based on the temperature and the initial SOC of the battery at the charging start moment, a target charging map from a plurality of preconfigured charging maps, where the charging map indicates charging rates of the battery that correspond to different temperatures and different SOCs, the target charging map meets a preset condition, and the preset condition includes at least one of the following: a charging rate corresponding to the temperature and the initial SOC of the battery at the charging start moment is the highest in the target charging map of the plurality of preconfigured charging maps; or an average value of charging rates corresponding to the temperature of the battery at the charging start moment, and an SOC range in which the initial SOC is located is the largest in the target charging map of the plurality of preconfigured charging maps; and performing charging based on the target charging map. This application is applied to a battery charging process.