Vehicle Power Supply Control Apparatus Mode Switching
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Solution Overview
Problem
Existing electric power supply control systems for vehicles do not effectively manage the switching between driving performance prioritization and in-cabin air conditioning operation, often leading to a sum of electric power consumed by the motor and air conditioner exceeding the battery's maximum permissible output.
Innovation Solution
An electric power supply control apparatus that prioritizes driving electric power or temperature controlling electric power within predetermined upper limit values, adjusting the supply of electric power to prevent exceeding the total electric power upper limit by switching modes when the sum of requested and actual electric powers exceeds this limit, ensuring both modes operate within the battery's capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the supply of driving electric power is prioritized over temperature controlling electric power, then driving performance is improved, but temperature control performance deteriorates
Solution Approach 1:
The system dynamically switches between driving prioritizing mode and temperature control prioritizing mode based on real-time power availability. The mode switching mechanism allows the system to adapt its power allocation strategy, ensuring that when total available power is sufficient, driving performance is prioritized, but when power is limited, temperature control is prioritized to prevent battery thermal issues.
Solution Approach 2:
The control apparatus changes the parameter of power allocation priority between two distinct modes. By switching the priority parameter between driving power and temperature control power based on the total available power from the battery, the system resolves the contradiction between maintaining driving performance and ensuring temperature control performance.
2Temperature
If the supply of temperature controlling electric power is prioritized over driving electric power, then temperature control performance is improved, but driving performance deteriorates
Solution Approach 1:
The system dynamically adjusts power allocation based on real-time conditions. When the battery's total available power is sufficient, the system operates in driving prioritizing mode. When power is limited, it switches to temperature control prioritizing mode, ensuring that temperature control performance is maintained without permanently sacrificing driving capability.
Solution Approach 2:
The control apparatus changes the priority parameter between driving electric power and temperature controlling electric power. By switching between modes based on available power, the system ensures that temperature control performance is improved when necessary without permanently deteriorating driving performance.
3Productivity
If both driving electric power and temperature controlling electric power are supplied at high levels, then both driving performance and temperature control performance are improved, but the sum of electric power exceeds the battery's maximum permissible output
Solution Approach 1:
The system dynamically determines the operating mode based on the battery's available power. When the sum of requested driving power and temperature control power exceeds the battery's maximum permissible output, the system switches to temperature control prioritizing mode, reducing driving power to ensure total power consumption remains within limits while maintaining temperature control performance.
Solution Approach 2:
The control apparatus preliminarily determines the appropriate mode before power allocation. By assessing the battery's available power in advance and selecting the appropriate mode (driving prioritizing or temperature control prioritizing), the system prevents the sum of electric power from exceeding the maximum permissible output while still providing high levels of both driving and temperature control performance when possible.
Data Source
AI summary
An electric power supply control apparatus for a vehicle decreases a first electric power prior to switching the modes, when a sum of a request value of a second electric power and the first electric power exceeds a total electric power upper limit value in the mode before the switching, and switches the modes after the sum of the decreased first electric power and the request value of the second electric power becomes equal to or smaller than the total electric power upper limit value.