Battery Heating Circuit Using Voltage Inversion for Low-Temperature Performance
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Solution Overview
Problem
Batteries experience decreased capacity and performance under low temperature conditions due to increased resistance and polarization, which affects their charge/discharge efficiency and service life.
Innovation Solution
A battery heating circuit comprising a switch unit, switching control module, damping component, energy storage circuit, and energy superposition unit, where the energy storage circuit is connected in series with the battery, and the switching control module controls the switch unit to manage energy flow and prevent high induced voltages, enhancing safety and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the switch unit is used to control energy flow in the battery heating circuit, then the charge/discharge performance of the battery is improved, but high induced voltage may damage the switch unit when the current drops abruptly to zero
Solution Approach 1:
The patent applies preliminary action by controlling the switch unit to turn off after the first positive half cycle of current, before the current drops abruptly to zero. This timing control prevents the generation of high induced voltage that would otherwise damage the switch unit, while still achieving effective battery heating and improved charge/discharge performance
Solution Approach 2:
The energy storage circuit comprising the current storage component L1 and charge storage component C1 acts as an intermediary between the battery and the switch unit. This energy storage circuit manages the energy flow and current characteristics, enabling the switch unit to operate safely by controlling when the current is interrupted
2Adaptability or versatility
If the battery operates under low temperature conditions, then the battery can function in harsh environments, but the resistance and polarization increase causing decreased capacity
Solution Approach 1:
The patent applies parameter changes by using the heating circuit to change the temperature parameter of the battery. The energy storage circuit delivers controlled energy to heat the battery, changing its temperature from low operating conditions to optimal operating temperature, thereby reducing resistance and polarization while maintaining low temperature adaptability
Solution Approach 2:
The heating circuit uses periodic switching action to deliver energy to the battery. The switch unit is controlled to turn on and off in periodic cycles, with each cycle delivering a controlled amount of energy to gradually heat the battery without causing overheating, thus maintaining capacity while improving low temperature performance
3Temperature
If the switch unit is controlled to switch off when current is flowing, then the heating effect is achieved, but high induced voltage is generated on the current storage component
Solution Approach 1:
The patent converts the potentially harmful effect of induced voltage into a beneficial control mechanism. By intentionally controlling the switch off-timing to occur after the first positive half cycle, the induced voltage is managed and used to achieve effective heating while preventing damage. The energy storage circuit transforms the abrupt current interruption into a controlled energy transfer process
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 battery heating circuit improves charge/discharge performance, prevents safety issues from switch failures, and increases discharging current, thereby enhancing the overall efficiency and safety of the battery heating process.
Implementation Method 1
the current storage component L1...configured to store current
Implementation Method 2
the charge storage component C1...configured to store charge
Implementation Method 3
the damping component R1...connected in series with the switch unit, the current storage component L1, and the charge storage component C1
Data Source
AI summary
Certain embodiments of the present invention provide a battery heating circuit, comprising a switch unit 1, a switching control module 100, a damping component R1, an energy storage circuit, and an energy superposition unit; the energy storage circuit is configured to connect with the battery to form a loop, and comprises a current storage component L1 and a charge storage component C1; the damping component R1, the switch unit 1, the current storage component L1, and the charge storage component C1 are connected in series; the switching control module 100 is connected with the switch unit 1, and is configured to control ON/OFF of the switch unit 1, so as to control the energy flowing between the battery and the energy storage circuit.