Liquid cooling energy storage system safety protection device and method based on electric core level thermal monitoring

Through multi-dimensional analysis of distributed fiber optic temperature sensors and auxiliary status sensors, combined with a three-level response strategy and independent signal transmission, the problem of precise monitoring and rapid protection at the cell level in liquid-cooled energy storage systems is solved, improving the system's safety and operational efficiency.

CN120824448AActive Publication Date: 2025-10-21CHANGZHOU LUOKAI NEW ENERGY TECH CO LTD
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Patent Information

Application Number
CN202511254858.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-04
Publication Date
2025-10-21
Estimated Expiration
2045-09-04

AI Technical Summary

Technical Problem

Traditional liquid-cooled energy storage systems have difficulty achieving accurate temperature measurement at the battery cell level. The cooling system and fire protection system have poor linkage and often rely on a single temperature parameter for judgment, which leads to misjudgment or missed judgment. The control link is prone to failure and it is difficult to quickly block thermal runaway in the early stages.

Method used

Distributed fiber optic temperature sensors and auxiliary status sensors are used to monitor the temperature and status of the battery cells in real time. Combined with multi-dimensional parameter analysis, a three-level response strategy is designed. Graded protection is implemented through liquid cooling flow regulation, PACK circuit disconnection, and directional fire spraying. Independent signal transmission at the execution layer ensures reliability.

Benefits of technology

It achieves precise temperature monitoring and rapid response at the cell level, reduces false operations, avoids waste of resources, and improves system safety and operational efficiency.

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Abstract

The invention discloses a liquid cooling energy storage system safety protection device and method based on electric core level thermal monitoring, and relates to the field of safety protection of electrochemical battery packs. The device is composed of a sensing layer, a control module and an execution layer, a distributed optical fiber temperature sensor in the sensing layer is tightly attached to the surface of each battery cell in a snakelike winding and point type fixing mode, a state sensor is assisted in monitoring current, voltage and liquid cooling pipeline parameters, and operation data can be collected in real time; after receiving the data, the control module adjusts response threshold sensitivity according to three-level response control in combination with charging, discharging or standby working conditions; the execution layer comprises a variable-frequency pump, a direct-current circuit breaker and an electromagnetic injection valve, operates according to instructions and feeds back states. According to the invention, electric core level precise monitoring is realized, through three-level response and multi-parameter analysis, the thermal runaway risk is warned in advance, the decision accuracy is improved, the execution reliability is ensured, the resource waste such as full-system injection is avoided, and the safety and the operation efficiency of the liquid cooling energy storage system are effectively improved.
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