Method for improving overflow of secondary injection procedure of square battery

By applying pressure after the secondary electrolyte injection of square batteries to control the consistency of battery thickness, the problem of electrolyte overflow was solved, and the production efficiency and quality of batteries were improved.

CN122177891APending Publication Date: 2026-06-09EVE ENERGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
EVE ENERGY CO LTD
Filing Date
2026-02-09
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In the existing technology, the secondary electrolyte injection process of square batteries has the problem of electrolyte overflow, which leads to electrolyte waste, increased production costs, impact on battery appearance and reduced cycle performance.

Method used

After the secondary liquid injection is completed, a pressure plate is set on the opposite side of the square battery. The pressure is applied perpendicular to the side and controlled within the range of 4.36 kgf/cm2-5.46 kgf/cm2. The pressure plate is used to apply pressure to the battery to control the uniformity of battery thickness.

Benefits of technology

Reduce electrolyte waste, lower production costs, reduce explosion-proof valve contamination, improve battery thickness consistency and electrolyte retention, and enhance battery cycle performance and product yield.

✦ Generated by Eureka AI based on patent content.

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    Figure CN122177891A_ABST
Patent Text Reader

Abstract

The application discloses a method for improving overflow of secondary liquid injection of square batteries, which comprises the following steps: after the completion of the secondary liquid injection, pressure plates are arranged on opposite sides of the square battery respectively, and the pressure plates are in contact with the sides of the square battery; pressure is applied to the square battery through the pressure plates; the pressure direction is perpendicular to the side of the square battery, and the applied pressure is 4.36-5.46 kgf / cm 2 . The method can obviously improve the overflow after the secondary liquid injection, and can also improve the consistency of the battery thickness, thereby improving the product yield and product quality.
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