Thermal insulation current collector for thermal battery and preparation method of thermal insulation current collector

By designing thermal current collectors for thermal batteries of nickel and stainless steel materials, combined with energy storage welding technology and double-layer lead redundant design, the problem of thermal battery current collectors being easily decomposed in high temperature environments is solved, achieving higher stack reliability and safety, as well as stable current output in harsh environments.

CN119650703APending Publication Date: 2025-03-18XIAN NORTH QINGHUA ELECTRIC APP CO LTD
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Patent Information

Application Number
CN202411702259.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-26
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

The existing thermal battery current collector is easy to decompose in a high-temperature environment, resulting in a decrease in material toughness and is unable to effectively cope with the high-temperature and high-pressure environment inside the stack after activation.

Method used

A thermal insulation current collector for thermal batteries is designed, and the current collector plate and lead wire made of nickel and stainless steel materials are connected by energy storage welding to form a double-layer lead redundant design to improve the reliability of current output.

Benefits of technology

This thermally insulated current collector improves the reliability and safety of the stack, prevents the battery from getting out of control, enhances the current output capability in high temperature and high voltage environments, and reduces the risk of lead-out line breakage caused by vibration and impact.

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Abstract

The invention relates to a thermal insulation current collector for a thermal battery, which can prevent thermal runaway and improve safety and reliability, and a preparation method thereof. Comprising an upper circular current collector, a lower circular current collector and two middle circular current collectors with square notches, and the square notches of the two circular current collectors with the square notches are respectively connected with a nickel outgoing line and a stainless steel outgoing line. Two circular current collecting pieces and a circular current collecting piece with a square notch are sequentially assembled at concentric positions from bottom to top, a nickel lead-out wire is placed at the notch of the circular current collecting piece with the square notch, and the nickel lead-out wire is fixedly connected in an energy storage welding mode to obtain a semi-thermal-insulation current collector containing the nickel lead-out wire; and welding the semi-thermal-insulation current collectors containing the stainless steel outgoing lines according to the same method, finally, tightly attaching one sides of the circular current collecting pieces with the square notches of the two semi-thermal-insulation current collectors, and fixedly connecting by adopting an energy storage welding mode to obtain the thermal-insulation current collector for the thermal battery. According to the invention, the working reliability, safety and stability of the electric pile are improved.
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