Electric vehicle

By combining a dual-motor system with engine losses, the problem of limited braking force in motor regenerative control of electric vehicles is solved, enabling sufficient braking force to be output without affecting battery charging and extending the life of mechanical brakes.

CN122126103APending Publication Date: 2026-06-02TOYOTA JIDOSHA KK
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TOYOTA JIDOSHA KK
Filing Date
2025-11-27
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In electric vehicles, the braking force output of motor regenerative control is limited, leading to increased use of mechanical brakes, reduced lifespan, and the inability to avoid inputting excessive power into the energy storage device.

Method used

The system employs a dual-motor system. By controlling the connection and disconnection of the first motor from the wheel, and in conjunction with engine or engine losses, it consumes the power regenerated by the second motor, thus avoiding excessive power input to the energy storage device while outputting sufficient braking force.

Benefits of technology

It achieves sufficient braking force output without exceeding the input limits of the energy storage device, extends the service life of the mechanical brake, and avoids battery overcharging.

✦ Generated by Eureka AI based on patent content.

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    Figure CN122126103A_ABST
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Abstract

This disclosure provides an electric vehicle that avoids excessive power input to the energy storage device even when the maximum power input to the energy storage device is limited, and outputs sufficient braking force based on motor regenerative control. The electric vehicle includes: a first motor connected to one of the front and rear wheels; a second motor connected to the other of the front and rear wheels; a battery capable of exchanging power with the first and second motors; a clutch for connecting and disconnecting the first motor from one of the wheels; and an electronic control unit that, when braking force is required during operation due to the limitation of the maximum power input to the battery, disengages the clutch to disconnect the first motor from one of the wheels, controls the power operation of the first motor, and performs regenerative control on the second motor.
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