Battery Charging Heater Control for Faster Charging Stability
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Solution Overview
Problem
Existing battery charging systems face challenges in reducing charging time while minimizing the occurrence of trouble associated with frequent changes in target battery temperature, which can lead to increased wear and tear on components like relays.
Innovation Solution
A charging system that acquires actual battery temperature and external power source output, sets a target temperature based on the output power, and updates the target temperature only when the output power exceeds a previous value, thereby reducing the frequency of heater stoppages and restarts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the target temperature is changed in accordance with the output electric power to shorten charging time, then the charging time is reduced, but the heater driving stops and restarts repeatedly causing increased wear on parts such as relays
Solution Approach 1:
The patent applies dynamics by making the target temperature adjustable and adaptable to changing external power source conditions. The control device dynamically adjusts the target temperature based on the output electric power, allowing the system to optimize charging speed when power is abundant while maintaining stability when power fluctuates, thereby resolving the contradiction between charging time and heater driving stability.
Solution Approach 2:
The patent changes the target temperature parameter according to the output electric power level. When the output electric power increases, the target temperature is raised to accelerate charging; when power is limited, the target temperature is lowered to prevent excessive heater cycling. This parameter adaptation resolves the technical contradiction by balancing charging efficiency with system reliability.
2Productivity
If the target temperature is raised when output electric power is great to shorten charging time, then charging time is reduced, but the frequency of heater stoppages and restarts increases accelerating deterioration of parts
Solution Approach 1:
The patent implements feedback control by continuously monitoring the output electric power from the external power source and adjusting the target temperature accordingly. The control device uses this feedback to maintain optimal charging conditions while preventing excessive heater cycling that would complicate the control system and accelerate component wear, thus balancing productivity with device complexity.
Solution Approach 2:
The patent applies preliminary action by setting the target temperature in advance based on the detected output electric power before charging begins. This pre-adjustment prevents the need for frequent real-time adjustments during charging, reducing heater stoppages and restarts while maintaining high charging speed when power is abundant, thereby addressing the contradiction between productivity and control complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively shortens charging time by allowing the battery temperature to rise when power is abundant, while minimizing the stress on components by reducing the number of heater stoppages and restarts.
Implementation Method 1
a heater for raising temperature of the battery
Data Source
AI summary
A charging system includes a battery that is chargeable using an external power source, a heater raising the battery temperature, and a control device. The control device acquires the actual temperature of the battery and the output electric power of the external power source, sets a target temperature of the battery based on the output electric power, and drives the heater when the actual temperature is lower than the target temperature during charging of the battery using the external power source. The control device further compares the present value of the output electric power with the previous value of the output electric power during charging of the battery using an external power source, updates the target temperature based on the present value when the present value exceeds the previous value, and maintains the target temperature at the currently-standing value when the present value does not exceed the previous value.