Battery Charge Control Device Using Time-Map Power Adjustment
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Solution Overview
Problem
Existing battery charging systems set charge current based solely on battery temperature, leading to excessively long charging times, causing user discomfort.
Innovation Solution
A charge control device that calculates and controls charge power using a map indicating the relationship between battery state, charge time, and charge power to ensure charging is completed within an allowable time, preventing prolonged charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If charge current is set based solely on battery temperature, then battery safety is improved, but charging time becomes excessively long causing user discomfort
Solution Approach 1:
The patent changes the control parameters from temperature-only to a combination of temperature, charge power, and charge time parameters. By referring to a map showing relationships between these parameters, the system dynamically adjusts charge current to balance safety and charging speed, resolving the contradiction between battery safety and charging time.
Solution Approach 2:
The patent implements dynamic charge control by continuously monitoring battery temperature and adjusting charge power in real-time based on the map data. This dynamic adjustment allows the system to optimize charging speed while maintaining safety, preventing the excessive charging time issue caused by static temperature-based control.
2Loss of time
If charge power is increased to reduce charging time, then user comfort is improved, but battery temperature control and safety are compromised
Solution Approach 1:
The patent employs feedback control by continuously monitoring battery temperature and charge state, then adjusting charge power based on the map data. This feedback mechanism ensures that charge power is increased only when safe, reducing charging time while maintaining temperature control and battery safety.
Solution Approach 2:
The patent uses pre-established map data showing relationships between charge power, temperature, and charge time to predict safe charging conditions. This preliminary preparation allows the system to optimize charge power before actual charging occurs, reducing charging time while preventing temperature issues.
3Device complexity
If constant current charging is used for simplicity, then device complexity is reduced, but charging efficiency and user satisfaction deteriorate
Solution Approach 1:
The patent introduces a map-based intermediate layer between the simple temperature sensor and the charge control system. This map serves as a lookup table that translates temperature and charge state into appropriate charge power settings, maintaining control system simplicity while achieving efficient, adaptive charging.
Data Source
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AI summary
A charge control device that charges a battery (20) to a predetermined charging rate using an output power from a charger (10) is provided. The device is provided with: a charger control means that controls the output power of the charger (10) based on a first map indicative of the relationship of the charge power with respect to the state of the battery (20) and the charge time of the battery (20), and an allowable charge time calculation means that calculates the allowable charge time of the battery charge time. The charge control device refers to the first map for calculating the charge power with which to charge the battery (20) in the allowable charge time, and controls the output power of the charger (10) according to the charge power calculated based on the allowable charge time.