Emergency Regenerative Braking Control Under Battery Full Charge
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Solution Overview
Problem
When a motor-driven mobile body's braking device detects an abnormality and the battery is fully charged, overcharging occurs, leading to reduced battery life and potential malfunctions.
Innovation Solution
A control device that regeneratively drives the motor for a predetermined grace time after detecting a braking device abnormality, allowing the battery to avoid overcharging and ensuring a braking force is maintained.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If regenerative braking is performed to obtain braking force, then the braking function is improved, but the battery may become overcharged causing abnormality
Solution Approach 1:
The control device implements feedback control by continuously monitoring battery charge levels during regenerative braking operations. When the battery charge level approaches full capacity, the control device adjusts or terminates regenerative braking to prevent overcharging. This feedback mechanism enables the system to maintain braking force while avoiding the harmful effects of overcharging, thus resolving the contradiction between productivity and harmful factors.
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
Prevents battery abnormalities by managing the regenerative drive during the grace period, ensuring safe and reliable stopping of the mobile body.
Implementation Method 1
the control device causes the motor to be regeneratively driven, thereby causing a braking force to be generated in the vehicle
Data Source
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AI summary
A control device (80) is installable in a mobile body including a motor (31) and a battery (33) and a regenerative drive of the motor and an actuation of a braking device (41, 42, 43, 44) allow a braking force to be applied to the mobile body. The control device includes: an abnormality detector (61) detecting an abnormality in the braking device; and a motor controller (60) controlling the motor. When a regenerative torque generated by the regenerative drive of the motor when the braking device is normal is defined as a normal regenerative torque, the motor controller causes, in response to the abnormality detector detecting the abnormality in the braking device, the motor to be regeneratively driven irrespective of a charged state of the battery until the elapse of a predetermined grace time from a point of time when the abnormality is detected so that an emergency regenerative torque larger than the normal regenerative torque is generated.