Cooling liquid filling and exhausting control method and device, thermal management system and storage medium

By controlling the switching state of the multi-way valve group, the battery thermal management branch and the electric drive thermal management branch are connected in parallel and series modes, which solves the problem of air residue during the coolant filling process, realizes the effective filling of coolant, and ensures vehicle performance and safety.

CN122083259APending Publication Date: 2026-05-26SAIC MOTOR
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Patent Information

Application Number
CN202411705589.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-26
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing technology cannot effectively remove air from the cooling circuit during coolant filling, resulting in the actual filling amount being lower than the theoretical value. This affects the normal operation of the cooling system and may cause the battery or electric drive to overheat, affecting vehicle performance and safety.

Method used

By controlling the multi-way valve group to switch to different conduction states, the battery thermal management branch and the electric drive thermal management branch are connected in parallel, first series and second series modes, so as to realize simultaneous filling and venting of coolant, ensuring that coolant is effectively injected and air is released.

Benefits of technology

It achieves effective coolant filling, avoids excess air residue affecting cooling performance, prevents battery or electric drive overheating, and ensures vehicle performance and safety.

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Abstract

The embodiment of the invention provides a cooling liquid filling and exhausting control method and device, a heat management system and a storage medium, and relates to the technical field of heat management. According to the cooling liquid filling and exhausting method, the multi-way valve group can be controlled to be switched to the first conduction state, so that the electric drive heat management branch is convenient to exhaust and inject cooling liquid; the multi-way valve group can be controlled to be switched to a second conduction state, so that local air release of the electric drive heat management branch and local air release of the battery heat management branch are facilitated; and the multi-way valve group can be controlled to be switched to a third conduction state, so that the electric drive heat management branch and the battery heat management branch can exhaust and inject cooling liquid. On the basis of the cooling liquid filling and exhausting control method provided by the invention, filling and exhausting are carried out at the same time, so that the problem that the cooling effect is influenced by residual redundant air is avoided, overheating of a battery or an electric drive is avoided, and the performance and safety of a vehicle are ensured.
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