Constant Power Charging for Mobile Terminals
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Solution Overview
Problem
Conventional charging methods for mobile terminals often lead to prolonged charging times due to temperature protection mechanisms triggered by high charging currents, and they require high maximum output power from chargers, which can be costly and inefficient.
Innovation Solution
Implementing a constant-power charging method that maintains a stable charging power throughout the process, reducing the risk of temperature protection activation and allowing for faster charging without the need for high maximum output power from chargers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If constant-current charging is used with high charging current, then charging speed is improved, but battery temperature rises and triggers temperature protection mechanism
Solution Approach 1:
The patent transitions from static constant-current charging to dynamic constant-power charging, where the charging parameters continuously adjust based on real-time battery state. The charging power remains constant while current and voltage dynamically change, allowing fast charging without excessive temperature rise.
Solution Approach 2:
The patent changes the charging control parameter from current to power. By controlling charging power instead of current, the system achieves better thermal management while maintaining high charging speed. The constant power approach balances energy input with heat generation.
2Reliability
If temperature protection mechanism is activated, then battery safety is improved, but charging time is prolonged
Solution Approach 1:
The patent implements preliminary temperature management by using constant-power charging from the start, preventing excessive temperature rise before it occurs. This proactive approach avoids triggering temperature protection mechanisms during charging.
Solution Approach 2:
The constant-power charging system continuously monitors battery parameters and adjusts charging current accordingly, providing real-time feedback control that maintains safe operating temperatures while maximizing charging speed.
3Power
If high maximum output power charger is used, then charging capability is improved, but charger cost increases
Solution Approach 1:
The patent applies partial power delivery continuously rather than requiring high peak power capacity. Constant-power charging delivers moderate sustained power that is more than sufficient for fast charging without needing expensive high-capacity power components.
Solution Approach 2:
The patent enables the use of lower-cost chargers with reduced maximum output power capability. By optimizing the charging algorithm, the system achieves fast charging performance without requiring expensive high-power charger hardware.
Data Source
AI summary
A charging method for a mobile terminal includes charging a rechargeable battery of the mobile terminal with a constant power, which further includes: charging the rechargeable battery of the mobile terminal with a first constant power determined based on an average charging power supported by the mobile terminal, when a maximum output power of a charger is greater than or equal to the average charging power supported by the mobile terminal; and charging the rechargeable battery of the mobile terminal with a second constant power determined based on the maximum output power of the charger, when the maximum output power of the charger is less than the average charging power supported by the mobile terminal.