Battery End-of-Charge Current Control to Prevent Lithium Plating

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Solution Overview

Problem

The existing charging methods for batteries, particularly during the end-of-charge phase, result in prolonged charging durations and risks of lithium precipitation and overcharging, which are not effectively addressed by current technologies.

Innovation Solution

A charging method that dynamically adjusts the charging current based on the battery's mode and status information, determining real-time electrical parameters to optimize the charging process and set appropriate cut-off conditions, ensuring safe and efficient charging.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a small current charging mode is used during the end-of-charge phase to ensure battery safety and prevent lithium precipitation, then charging safety is improved, but charging duration becomes excessively long

Engineering Contradiction:

Improvecharging safetyVSAvoidcharging duration

Core Design Contradiction:

ReliabilityVSDuration of action of moving object

Solution Approach 1:

The patent implements dynamic current adjustment during the end-of-charge phase by continuously monitoring battery voltage and state of charge, transitioning from fixed small current to variable current profiles that adapt to real-time battery conditions, thereby reducing charging duration while maintaining safety

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the charging current parameter dynamically during the end-of-charge phase based on battery voltage and state of charge thresholds, optimizing the balance between charging speed and battery safety by adjusting electrical parameters in response to battery state

Inventive Principle:

Principle #35Parameter changes

2Productivity

If the charging current is increased to reduce charging duration, then charging efficiency is improved, but the risk of lithium precipitation and overcharging increases

Engineering Contradiction:

Improvecharging efficiencyVSAvoidlithium precipitation risk

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent employs feedback control by continuously monitoring battery voltage, state of charge, and temperature, and adjusting charging current accordingly to prevent lithium precipitation and overcharging while maximizing charging efficiency

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent applies preliminary protective measures by setting predetermined voltage and state of charge thresholds before reaching dangerous levels, preventing lithium precipitation and overcharging through proactive current adjustment rather than reactive correction

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20260011799A1Charging method and apparatus, computer device, and storage medium

Publication Date: 2026.01.08 CONTEMPORARY AMPEREX TECHNOLOGY CO LTD

AI summary

A charging method and apparatus, a computer device, and a storage medium. The method includes: when a battery reaches an end-of-charge phase, acquiring a charging mode of the battery during the end-of-charge phase, where in the charging mode, a charging current of the battery changes dynamically; then determining an electrical parameter value required for charging the battery during the end-of-charge phase on the basis of the charging mode and status information of the battery; and finally, sending the electrical parameter value to a charging pile of the battery until a charging cut-off condition of the battery is reached.