Vehicle Battery Temperature Control by Driving State
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Solution Overview
Problem
Existing battery control systems fail to maintain a target temperature range effectively, leading to battery deterioration and reduced durability, especially when uniform temperature limits are applied without considering operational states.
Innovation Solution
A control device and method that dynamically adjust the target temperature range of a battery based on the vehicle's operational state, such as traveling with or without navigation, and charging modes, using a processor to control the temperature adjustment device and maintain the battery within the appropriate temperature range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uniform temperature limit values are set for the battery without considering operational states, then the control system is simple, but the battery cannot be maintained at the target temperature leading to deterioration
Solution Approach 1:
The patent applies dynamics by making the target temperature range adjustable based on operational state. The control device dynamically changes the lower and upper limit values of the target temperature range according to whether the vehicle is in automated driving mode or manual driving mode, allowing the system to adapt to different operational conditions rather than using fixed uniform limits
Solution Approach 2:
The patent implements parameter changes by modifying the temperature control parameters (lower limit value and upper limit value) based on the operational state. When automated driving is active, a narrower target temperature range is used compared to manual driving, thereby optimizing battery maintenance across different operating conditions
2Reliability
If a narrower target temperature range is used for automated driving, then battery maintenance is improved, but the risk of temperature deviation increases
Solution Approach 1:
The patent applies preliminary action by proactively switching from automated driving to manual driving when the battery temperature approaches the narrower target temperature range boundaries. This preventive measure avoids actual temperature deviations by giving the driver early warning to take over control before the temperature exceeds acceptable limits
Solution Approach 2:
The patent implements feedback by continuously monitoring the battery temperature and comparing it against the operational-state-dependent target temperature range. When the temperature approaches the boundaries of the narrower range during automated driving, the system provides feedback by triggering a mode switch alert, creating a closed-loop control mechanism
Data Source
AI summary
A control device of a vehicle includes a processor. The processor is configured to execute a program to acquire information indicating an operation state of the vehicle and a temperature of an electricity storage device, determine a target temperature range of the electricity storage device associated with the operation state, and control an operation of the electricity storage device on the basis of the temperature of the electricity storage device and the target temperature range. The operation state includes a first traveling state in which the vehicle is traveling without being in cooperation with a navigation device and a second traveling state in which the vehicle is traveling in cooperation with the navigation device, and the target temperature range associated with the second traveling state is narrower than the target temperature range associated with the first traveling state.