Vehicle battery charging system using a motor drive system

The vehicle battery charging system addresses inefficiencies in charging systems by using multiple inverters and semiconductor switching elements to convert charging voltage and manage capacitor connections, ensuring efficient charging across varying voltages and reducing overheating risks.

JP7864615B2Active Publication Date: 2026-05-25HYUNDAI MOTOR CO LTD +1
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Patent Information

Application Number
JP2022172680
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2022-02-07
Filing Date
2022-10-27
Publication Date
2026-05-25
Estimated Expiration
2042-10-27

AI Technical Summary

Technical Problem

Existing vehicle battery charging systems face challenges in efficiently charging batteries with varying voltage ranges without additional infrastructure or cost, and conventional motor drive systems using relays for voltage conversion suffer from overheating and reliability issues.

Method used

A vehicle battery charging system using a motor drive system with multiple inverters and semiconductor switching elements to convert charging voltage and control the connection of a charging capacitor to the motor's neutral terminal, eliminating the need for additional infrastructure and reducing overheating risks.

Benefits of technology

Enables efficient battery charging across various voltage ranges without additional infrastructure, reduces overheating and reliability issues, and minimizes social costs by using semiconductor switching elements instead of relays.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide a vehicular battery charge system using a motor drive system.SOLUTION: A vehicular battery charge system includes: first and second inverters respectively including a plurality of first switching elements and a plurality of second switching elements and including a DC end connected to a battery and an AC end respectively connected to one end and the other end of a plurality of coils; a plurality of third switching elements including one ends respectively connected to the other ends of the plurality of coils and mutually connected the other ends; a charging capacitor which is disposed between the other ends of the plurality of third switching elements and a negative terminal of the battery and to which a DC charging voltage is applied in a charging mode in which the battery is charged; a fourth switching element connected in series with the charging capacitor; and a controller which turns on the fourth switching element in the charging mode and controls open-circuited / short-circuited states of the first, second and third switching elements based on magnitudes of the DC charging voltage and a voltage of the battery.SELECTED DRAWING: Figure 1
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Citation Information

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    JP2016528862A

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