Battery Management Handshake Control for Stable Fast Charging
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Solution Overview
Problem
Existing charging technologies face issues with initiating a fast charging handshake at inappropriate times, leading to negative effects such as voltage drops, brownouts, and prolonged device shutdowns due to insufficient battery conditions.
Innovation Solution
A battery management unit determines fast charging handshake criteria based on battery temperature and aging condition, transmitting an initiation signal only when the battery is capable of supporting the handshake, allowing for a successful fast charging protocol.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If fast charging handshake is initiated before battery is ready, then charging speed is improved, but voltage stability deteriorates causing brownouts and failures
Solution Approach 1:
The system performs preliminary assessment of battery readiness conditions (temperature, aging state, voltage level) before initiating the fast charging handshake. The BMU evaluates whether the battery can support the fast charging protocol in advance, and only initiates the handshake when conditions are satisfied, preventing voltage instability while enabling fast charging when safe
Solution Approach 2:
The system continuously monitors battery parameters (temperature, voltage, aging condition) and uses this feedback to dynamically determine whether to initiate or maintain fast charging handshake. The BMU adjusts charging protocol based on real-time battery state feedback, ensuring voltage stability while maximizing charging speed when conditions permit
2Reliability
If fast charging handshake is delayed until battery is ready, then voltage stability is maintained, but charging time increases
Solution Approach 1:
The system performs preliminary assessment of battery readiness conditions (temperature, aging state, voltage level) before initiating the fast charging handshake. The BMU evaluates whether the battery can support the fast charging protocol in advance, and only initiates the handshake when conditions are satisfied, preventing voltage instability while enabling fast charging when safe
Solution Approach 2:
The system dynamically adjusts the charging protocol based on real-time battery conditions. The BMU can transition between normal charging and fast charging protocols depending on whether the battery meets readiness criteria, optimizing the balance between charging speed and voltage stability throughout the charging process
3Ease of operation
If normal charging protocol is used when battery charge is low, then device functionality is maintained, but charging efficiency decreases
Solution Approach 1:
The system dynamically adjusts the charging protocol based on real-time battery conditions. The BMU can transition between normal charging and fast charging protocols depending on whether the battery meets readiness criteria, optimizing the balance between charging speed and voltage stability throughout the charging process
Data Source
AI summary
A battery configured to power a device includes a battery management unit (BMU). The BMU is configured to determine a fast charging handshake criteria based at least in part on a temperature of the battery and an aging condition of the battery. The BMU is also configured to transmit a fast charging handshake initiation signal based at least in part on a battery characteristic of the battery satisfying the fast charging handshake criteria.