Battery Pack Thermal Wake-Up Control During Vehicle Power-Off
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Solution Overview
Problem
Existing heat management systems in hybrid electric and pure electric vehicles cannot control battery pack temperature when the vehicle is powered off, leading to potential safety issues due to extreme temperatures caused by ambient conditions.
Innovation Solution
A battery pack control method and system that includes a battery sensor, heating module, and cooling module, which acquires current temperature values and thermostatic control states when the vehicle is off, and switches to a powered-on state to perform heating or cooling processes when necessary to maintain the battery pack within a preset temperature range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the vehicle is powered off to save energy, then energy consumption is reduced, but the battery pack temperature cannot be controlled leading to safety risks
Solution Approach 1:
The system performs preliminary temperature detection and control actions before the vehicle is fully powered off or before extreme temperatures can cause damage. The battery temperature is monitored continuously, and heating or cooling operations are initiated in advance to maintain temperature within safe ranges, preventing temperature-related failures before they occur.
Solution Approach 2:
The battery management system automatically monitors its own temperature status and independently activates heating or cooling operations without requiring external intervention. The system uses its own power supply to perform self-diagnosis and self-regulation, maintaining battery temperature safety autonomously during powered-off states.
2Reliability
If the heat management system is activated to control battery temperature, then battery safety is improved, but the vehicle cannot remain in powered-off state leading to increased energy consumption
Solution Approach 1:
The system applies partial heating or cooling actions based on the actual temperature deviation from the target range. Instead of continuously operating at full capacity, the system activates heating or cooling only to the extent necessary to return the battery temperature to the safe range, minimizing energy consumption while ensuring safety.
Solution Approach 2:
The temperature monitoring and control operations are performed periodically rather than continuously. The system checks battery temperature at set intervals and activates heating or cooling only when temperature deviations are detected, reducing overall energy consumption while maintaining effective temperature control through periodic intervention.
3Use of energy by moving object
If the battery temperature is allowed to vary freely when powered off, then energy consumption is minimized, but the vehicle cannot be restarted reliably under extreme temperature conditions
Solution Approach 1:
The system performs preliminary heating or cooling operations before the vehicle restart is attempted. By detecting temperature deviations during the powered-off state and correcting them in advance, the system ensures that the battery temperature is within the suitable range before restart, guaranteeing reliable vehicle operation without requiring high energy consumption during the powered-off period.
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
Ensures the battery pack temperature remains within a suitable range upon restarting, preventing damage and safety hazards, and optimizing vehicle readiness for use.
Implementation Method 1
performing a heating process on the battery pack if the heating module satisfies a first preset condition so that the temperature of the battery pack returns to be within the preset range
Implementation Method 2
performing a cooling process on the battery pack if the cooling module satisfies a second preset condition so that the temperature of the battery pack returns to be within the preset range
Data Source
AI summary
The present disclosure provides a battery pack control method, a system and a vehicle, wherein the vehicle includes a battery sensor, a heating module and a cooling module; when the vehicle is in a powered-off state, a battery sensor is firstly used to detect the current battery temperature value of the battery pack and the current state of the thermostatic control function of the battery pack; and when the current temperature value of the battery pack is out of a preset range and the thermostatic control function of the battery pack opens, the vehicle is waken up, and then the battery pack is thermostatic controlled, so that the temperature of the battery pack is maintained within the preset range, which facilitates the restarting and use of the vehicle.