Vehicle battery protection device and thermal management method thereof

By employing a thermally isolated chamber and active thermal management in the battery protection device, the thermal management problem during high-current startup is solved, thereby improving the reliability and applicability of the device.

CN122295241APending Publication Date: 2026-06-26CLARIDI DEVELOPMENTS LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-08-28
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing battery protection devices suffer from thermal management issues during high-current startup, leading to devices that are too large or impractical. Furthermore, the high heat generation of solid-state switches has not been effectively addressed, affecting the reliability and applicability of the devices.

Method used

Employing a thermally isolated chamber design and an active thermal management scheme, the solid-state switch is actively cooled by separating internal components and combining Peltier devices and auxiliary heat sinks. Combined with software algorithms for forward-looking thermal analysis and safety control, it ensures that the solid-state switch operates within a safe operating range.

Benefits of technology

It effectively reduces the risk of thermal runaway and failure modes, improves the reliability and applicability of the device, and enables it to operate stably in different vehicle environments.

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Abstract

A vehicle battery protection device for maintaining vehicle battery charge is electrically connected between the vehicle battery and the vehicle's electrical system. The device includes a solid-state switch that can be controlled to switch between an on and off state. Thermal safety algorithms that can be executed by the device may include switch derating processes, thermal analysis calibration, vehicle profiling, and data reconciliation. The device utilizes hardware and software solutions to reduce the risk of thermal runaway and component failure while maximizing its usable operating range. The software solution may include predicting the future thermal load of the device based on vehicle usage patterns specific to the vehicle in which the device is installed. These predictions can be used to generate risk datasets, thereby influencing whether and to what extent thermal mitigation measures are activated at any given time.
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