Battery Management Support Device for EV Thermal Control
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Solution Overview
Problem
Existing battery management systems for electric vehicles fail to effectively manage battery health by not adequately addressing high-temperature conditions, leading to premature deterioration and reduced battery life.
Innovation Solution
A battery management support device and method that acquires and analyzes information on battery temperature, electrical connection state, and cooling device operation to issue notices for electrical connection and performance guarantee guidance, optimizing cooling operations and extending battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the battery is cooled by operating a fan or pump using battery electric power, then the battery temperature is reduced and deterioration is suppressed, but the battery electric power is consumed and may be insufficient for other vehicle operations
Solution Approach 1:
The invention introduces an external power supply as an intermediary source to provide electric power for battery cooling operations. When the external power supply is connected, its power is used to operate the air conditioner compressor or fan, thereby cooling the battery without consuming the vehicle's battery electric power. This resolves the contradiction by mediating between the cooling need and power availability through an external power source.
Solution Approach 2:
The system performs preliminary cooling of the battery when the external power supply is connected and the vehicle is stationary, before the battery is needed for vehicle operation. By proactively cooling the battery in advance using external power, the system prevents high-temperature deterioration without impacting the battery's power availability when the vehicle is driven.
2Reliability
If the battery is managed to be used in an appropriate temperature state, then the deterioration of the battery is suppressed and life is prolonged, but the system complexity increases due to monitoring and control requirements
Solution Approach 1:
The invention leverages the multi-functionality of the air conditioner system to serve dual purposes: providing cabin cooling and cooling the battery. The air conditioner compressor and fan are used for both passenger comfort and battery thermal management, eliminating the need for a separate dedicated battery cooling system and thereby reducing overall system complexity while ensuring reliable battery temperature control.
Solution Approach 2:
The system uses the vehicle's existing air conditioning infrastructure to provide battery cooling, allowing the battery management function to be achieved through resources already available in the vehicle. The air conditioner system serves itself to also cool the battery, reducing the need for additional dedicated components and simplifying the overall thermal management architecture.
3Temperature
If cooling operations are performed using battery electric power when parked, then the battery temperature is controlled, but the operation time is limited by the battery charge level
Solution Approach 1:
The external power supply acts as an intermediary power source that enables extended battery cooling operations during parking. By connecting to external power, the system can operate the air conditioner for prolonged periods to cool the battery without being constrained by the limited charge capacity of the vehicle's battery, thereby extending the duration of effective thermal management.
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 solution effectively manages battery health by ensuring appropriate cooling and electrical connection, thereby prolonging battery life and preventing premature deterioration.
Implementation Method 1
a pump for pumping a refrigerant cooling the battery
Data Source
AI summary
A battery management support device that is configured to acquire information on an electric vehicle including a battery that is rechargeable with electric power received from an external power supply. The information includes at least information when the electric vehicle is parked indicating a temperature of the battery, information when the electric vehicle is parked indicating an electrical connection state between the electric vehicle and the external power supply, and information when the electric vehicle is parked indicating an operation state of a cooling device for the battery.