Oil sump temperature control method and device for oil-cooled electric drive system

By dynamically matching the target heating power of the heater, the problem of limited temperature control accuracy in oil-cooled electric drive systems is solved, enabling precise control of lubricating oil temperature, improving system safety and energy efficiency, and extending the service life of lubricating oil and related components.

CN122107254APending Publication Date: 2026-05-29BEIJING AUTOMOBILE RES GENERAL INST
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING AUTOMOBILE RES GENERAL INST
Filing Date
2026-02-10
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In existing oil-cooled electric drive systems, the temperature control accuracy is limited, leading to localized overheating or insufficient temperature rise of the lubricating oil, which affects lubrication performance and consequently impacts the system's operational reliability and service life.

Method used

By collecting the actual temperature of the lubricating oil and identifying user needs, the target heating power of the heater is dynamically matched, and the heater is controlled to heat the oil pan according to the target heating power, so as to achieve fine regulation of the lubricating oil temperature. When necessary, the heating mode is adjusted or heating is stopped to avoid overheating.

Benefits of technology

It improves the system's operational safety, reliability, and energy efficiency, is suitable for various ambient temperatures and vehicle operating conditions, prevents localized overheating and oil performance degradation, and extends the service life of lubricating oil and related components.

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Abstract

The application relates to the technical field of oil temperature control, in particular to an oil sump temperature control method and device of an oil-cooled electric drive system, wherein the method comprises the following steps: collecting the actual temperature of machine lubricating oil and identifying the actual demand of a user; in the case that the actual temperature is less than a first preset temperature and the actual demand is a vehicle use demand, a first target heating power of a heater is matched according to the actual temperature; the heater is controlled to heat the oil sump based on the first target heating power until the actual temperature is greater than or equal to the first preset temperature. Therefore, the problem that the temperature control precision is limited, the lubricating oil is locally overheated or insufficiently heated, the lubricating oil performance is reduced, the lubricating oil is aged, and the operation reliability and service life of the oil-cooled electric drive system are affected is solved due to the fact that related technologies usually rely on passive heat transfer or fixed power control.
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