Vehicle Battery Power Control Under High A/C Cooling Load
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Solution Overview
Problem
Vehicle control devices face challenges in suppressing battery deterioration and maintaining cabin cooling performance when the air conditioning system is in a high load state, as excessive battery cooling can lead to battery degradation and reduced cabin comfort, especially in hot environments.
Innovation Solution
A vehicle control device that determines when the air conditioning system is under high load and restricts either the input or output power of the battery to prevent excessive cooling, ensuring that the cooling performance is prioritized for the cabin while minimizing battery heat generation and deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If battery cooling is performed when air conditioning is in high load state, then battery temperature can be reduced, but cooling performance of vehicle cabin deteriorates and occupant comfort is lowered
Solution Approach 1:
The control device changes the operating parameters of the battery (input power or output power) based on the air conditioning load state. When air conditioning load is high, the device restricts battery power parameters to prevent excessive cooling demand, thereby prioritizing cabin cooling while avoiding battery deterioration
Solution Approach 2:
The system dynamically adjusts battery power restrictions based on real-time air conditioning load conditions. The control device continuously monitors the air conditioning load state and adaptively modifies battery input/output power limits, creating a dynamic balance between battery temperature management and cabin cooling performance
2Ease of operation
If battery cooling is prohibited when air conditioning is in high load state, then cooling performance of vehicle cabin is maintained, but battery temperature becomes excessively high and battery deteriorates
Solution Approach 1:
The control device modifies battery power parameters (input power or output power) based on air conditioning load state. By restricting these parameters during high load conditions, the system prevents excessive battery heat generation while maintaining adequate cooling performance for the cabin
Solution Approach 2:
The control device implements a feedback mechanism that monitors air conditioning load state and adjusts battery power restrictions accordingly. This closed-loop control ensures that battery power is restricted only when necessary (during high air conditioning load), maintaining cabin cooling performance while preventing battery deterioration
3Temperature
If at least one of input power or output power of battery is restricted when air conditioning is in high load state, then heat generation of battery is suppressed, but power availability for drive motor is reduced
Solution Approach 1:
The control device selectively restricts battery parameters (input power or output power) based on the specific operating conditions and air conditioning load state. This targeted parameter adjustment suppresses battery heat generation while minimizing the impact on power availability for the drive motor
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
This solution effectively suppresses battery deterioration and maintains cabin cooling performance by restricting power to the battery during high air conditioning loads, ensuring occupant comfort and reducing battery heat generation without compromising vehicle performance.
Implementation Method 1
a vehicle control device that controls an air conditioning device and a battery in a vehicle that uses a coolant of the air conditioning device that cools a vehicle cabin for cooling the battery
Data Source
AI summary
A vehicle control device that controls an air conditioning device and a battery in a vehicle that uses a coolant of the air conditioning device that cools a vehicle cabin for cooling the battery, the vehicle control device including: an air conditioning load determination unit that determines whether the air conditioning device is driven by a predetermined load or more; and a battery input-output control unit that controls at least one of an input power or an output power of the battery. When the air conditioning device is driven by the predetermined load or more, at least one of the input power or the output power is restricted without cooling the battery.