A battery safety monitoring system, a battery assembly, and an electric vehicle

By installing lidar inside the battery pack to monitor cell surface deformation and generate safety control signals, the problem of the inability to detect cell thermal runaway in the early stage in the existing technology is solved, realizing early reliable early warning and graded safety protection for electric vehicle power batteries.

CN122354301APending Publication Date: 2026-07-10CHINA FAW CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA FAW CO LTD
Filing Date
2026-04-21
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing electric vehicle power battery thermal runaway monitoring technology cannot directly detect the physical deformation of the cell in the early stage of thermal runaway, resulting in a very limited warning time window and a lack of independent safety redundancy monitoring channels, which cannot meet the safety-critical system requirements of ISO 26262 ASIL-C/D.

Method used

LiDAR is used to monitor cell surface deformation inside the battery pack. The control unit calculates three-dimensional point cloud data, generates safety control signals, and triggers high-voltage relays to disconnect or cooling pumps to start via hard-wired output circuits, thus constructing a safety redundant monitoring channel independent of the main battery management system.

Benefits of technology

It enables non-contact, real-time, and high-precision monitoring of cell surface deformation characteristics, provides early warning of thermal runaway risks, meets high-level functional safety standards, and ensures normal operation even when the main battery management system fails.

✦ Generated by Eureka AI based on patent content.

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Abstract

This application provides a battery safety monitoring system, a battery pack, and an electric vehicle, including: a lidar installed inside the battery pack housing, with the lidar's optical window facing the surface of the battery cell to be measured; a control unit connected to the lidar, used to receive three-dimensional point cloud data of the surface to be measured collected by the lidar, to calculate the deformation characteristics of the battery cell surface based on the three-dimensional point cloud data, and to generate a safety control signal when the deformation characteristics indicate a risk of thermal runaway; and a hard-wired output circuit, used to trigger a high-voltage relay to disconnect the high-voltage circuit of the battery pack and / or trigger a cooling pump to start when a safety control signal is received. This application achieves early and reliable warning of thermal runaway risk by directly sensing the three-dimensional deformation characteristics of the battery cell surface.
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