Battery Heater with Variable Resistor for Rapid Cold Warming
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Solution Overview
Problem
Current battery temperature raising systems face challenges in efficiently shortening battery temperature rising time in cryogenic conditions while ensuring safety and preventing thermal deformation and overheating, which can lead to fire risks and energy wastage.
Innovation Solution
A battery temperature raising system that includes a power supply, a surface type heater, a variable resistor, and sensors to adjust the heating value based on temperature deviations, controlling the heater's operation to optimize heating efficiency and prevent excessive temperature rises, thereby ensuring safety and reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the heating value from the heater is increased to shorten the battery temperature rising time, then the temperature rising speed is improved, but the risk of fire and thermal deformation increases
Solution Approach 1:
The patent applies dynamics by making the heating value adjustable rather than fixed. The controller dynamically changes the heating value based on real-time temperature feedback from the battery, allowing the system to optimize between rapid heating and safety. This is achieved through a control mechanism that monitors battery temperature and adjusts the heater's power output accordingly, preventing excessive heating while maintaining efficient temperature rise during normal operation.
Solution Approach 2:
The patent implements feedback control by using temperature sensors to continuously monitor the battery temperature and feeding this information back to the controller. The controller then adjusts the heating value based on the temperature deviation from the target range. This closed-loop feedback system ensures that the heater provides sufficient power for rapid warming while automatically reducing power when the battery approaches optimal temperature, thereby preventing fire risks and thermal deformation.
2Loss of time
If the heating value from the heater is increased unconditionally, then the temperature rising time is shortened, but the safety of the battery cannot be secured during system failure
Solution Approach 1:
The patent applies beforehand cushioning by preparing a safety mechanism that limits the maximum heating value before any failure can occur. The controller is designed with predetermined safety thresholds and control logic that automatically restricts the heating power under abnormal conditions. This pre-built protective mechanism ensures that even if the temperature sensing or control system fails, the heater cannot exceed safe power levels, thus preventing catastrophic failures while maintaining effective heating during normal operation.
3Speed
If the resistance of power supply is decreased to increase heating value, then the temperature rising speed is improved, but the risk of fire due to excessive temperature rising increases
Solution Approach 1:
The patent applies dynamics by dynamically adjusting the resistance of the power supply rather than using a fixed resistance value. The controller modifies the resistance based on real-time temperature feedback, allowing the system to provide high heating power (low resistance) when the battery is cold and needs rapid warming, while automatically increasing resistance (reducing power) when the battery approaches optimal temperature. This dynamic resistance adjustment optimizes temperature rising speed while preventing excessive temperature and fire risks.
Solution Approach 2:
The patent implements parameter changes by varying the electrical resistance of the power supply as a control parameter. By changing the resistance value based on battery temperature conditions, the system can precisely control the heating power output. This parameter adjustment allows the heater to deliver high power for rapid temperature increase when needed, while automatically reducing power output to prevent excessive temperature rise and associated fire risks.
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
The system efficiently shortens battery temperature rising time, prevents thermal deformation and overheating, and reduces energy waste, ensuring safe and rapid charging while maintaining battery durability.
Implementation Method 1
a heater (20) attached to a battery module (10) and increasing a battery temperature by heating operation
Data Source
AI summary
A battery temperature raising system and a control method thereof are provided. The battery temperature raising system includes a power supply that operates a heater attached to a battery module. The heater is configured to increase a battery temperature and a variable resistor mounted on a circuit between the heater and the power supply adjusts a heating value of the heater based on an adjustment state of a resistance value. A heater relay is mounted on the circuit between the heater and the power supply and opens and closes the circuit to selectively turn on/off the heater. A first sensor senses the battery temperature and a second sensor senses a heater temperature. A controller outputs a control signal to operate the heater relay to selectively turn on/off the heater based on temperature information sensed by the sensors and a control signal to adjust the resistance value of the variable resistor.