Electrolyte injection device and battery production system

The electrolyte is injected in multiple stages and uniformly wetted by the injection and pushing mechanisms of the injection device, which solves the problems of long injection time and uneven wetting in the prior art, and improves battery production efficiency and battery performance.

WO2026113565A1 Publication Date: 2026-06-04WUXI LEAD INTELLIGENT EQUIP CO LTD
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Patent Information

Application Number
PCT/CN2025/120379
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-11-27
Filing Date
2025-09-10
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Existing electrolyte injection devices have long injection times, low production efficiency, and uneven electrolyte wetting inside the battery casing, which affects battery performance.

Method used

Design a liquid injection device, including an injection mechanism and a push mechanism. Through the cooperation of a first rod and a second rod, intermittent injection of electrolyte and sealing of the outlet are achieved, and electrolyte is injected into the battery casing in multiple times. Combined with positive and negative pressure operation, the electrolyte is ensured to be uniformly wetted.

Benefits of technology

This improved the wetting speed and uniformity of the electrolyte inside the battery casing, thereby increasing battery production efficiency and ensuring battery performance.

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Abstract

Disclosed in the present invention are an electrolyte injection device and a battery production system. The electrolyte injection device comprises: an electrolyte injection mechanism, comprising an electrolyte injection cavity and electrolyte injection cups, wherein the interior of the electrolyte injection cavity is suitable for holding battery casings, the electrolyte injection cups are suitable for containing an electrolyte, the electrolyte injection cups are connected to the electrolyte injection cavity, each electrolyte injection cup is provided with an electrolyte outlet, and each electrolyte outlet is communicated with the electrolyte injection cavity and is opposite to the corresponding battery casing; and electrolyte pushing mechanisms, each comprising a first rod and a second rod, wherein each second rod is movably arranged in the corresponding first rod, each first rod can move in the corresponding electrolyte injection cup so as to push the electrolyte in the electrolyte injection cup into the electrolyte injection cavity from the corresponding electrolyte outlet, and each second rod can move relative to the corresponding first rod and can block or open the corresponding electrolyte outlet. Each second rod can intermittently block or open the corresponding electrolyte outlet, enabling multiple injections of the electrolyte into the corresponding battery casing, thereby increasing the speed at which the electrolyte wets the interior of the battery casing and improving the battery production efficiency, and the electrolyte uniformly wets the interior of the battery casing, ensuring the performance of batteries.
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