Battery Preheating Control for Low-Temperature Charging Safety
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Solution Overview
Problem
Conventional battery charging systems are inefficient and unsafe at low temperatures, as they fail to effectively heat batteries, leading to poor charging performance and increased risk of battery fires.
Innovation Solution
A battery low-temperature heating and charging system that includes a heating module, switching module, temperature sensor, current sensor, and battery management system to control heating and charging based on temperature thresholds, ensuring efficient charging and safety by limiting output voltage and switching off heating when temperatures exceed safe levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the battery is charged in a low temperature environment without heating, then the charging process can proceed, but the charging effect is poor and safety is compromised
Solution Approach 1:
The system performs preliminary heating of the battery before charging begins. The control module detects when battery temperature is below the first threshold temperature and activates the heating module to raise the temperature to an appropriate range before allowing charging to proceed, ensuring both charging efficiency and safety
Solution Approach 2:
The system continuously monitors battery temperature through the temperature sensor and adjusts the heating module operation accordingly. The control module compares detected temperature with threshold values and dynamically controls heating power, reducing heating when temperature reaches the second threshold to prevent overheating while maintaining optimal charging conditions
2Reliability
If the heating module is continuously activated to maintain battery temperature, then the battery temperature remains stable, but energy is wasted when the battery is already at appropriate temperature
Solution Approach 1:
The control module continuously receives temperature feedback from the temperature sensor and adjusts the heating module operation accordingly. When battery temperature reaches or exceeds the second threshold temperature, the control module reduces or stops heating, preventing energy waste while maintaining temperature stability in the optimal range
Solution Approach 2:
The system dynamically adjusts the heating module operation based on real-time temperature conditions. The heating power is not fixed but varies according to the battery's actual temperature state, transitioning between heating modes and idle modes to optimize energy efficiency
3Productivity
If the power generation module outputs high voltage to charge the battery quickly, then charging speed increases, but the battery may be damaged at low temperatures
Solution Approach 1:
The system prepares the battery by heating it to an appropriate temperature range before high-voltage charging begins. This preliminary temperature preparation ensures the battery can safely accept high-voltage charging current without damage, enabling both fast charging and safety
Solution Approach 2:
The system prevents potential battery damage by counteracting the harmful effect of low temperature before high-voltage charging occurs. The heating module is activated in advance to raise battery temperature to a safe level, preventing the harmful combination of low temperature and high-voltage charging
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 effectively heats batteries at low temperatures, improving charging efficiency and safety by preventing energy waste and battery fires, while ensuring reliable power supply for vehicle-mounted air conditioning systems.
Implementation Method 1
the battery module supplies power to the heating module through the switching module, and the heating module is powered to heat the battery module
Implementation Method 2
a temperature sensor configured to acquire a temperature of the battery module
Implementation Method 3
a current sensor having a first terminal connected to a second terminal of the power generation module, and a second terminal connected to a second terminal of the battery module, the current sensor being configured to detect current supplied from the power generation module to the battery module
Data Source
AI summary
The present disclosure relates to a battery low-temperature heating and charging system, a vehicle-mounted air conditioning system and a vehicle. The battery low-temperature heating and charging system includes: a heating module, a switching module, a battery module, a power generation module, a temperature sensor, a current sensor, and a battery management system. The battery management system is respectively connected to the temperature sensor, the current sensor, the switching module and the power generation module. The current sensor is arranged between the battery module and the power generation module, and the heating module is connected to the switching module.