A single cell and a battery pack

By creating through holes in the current collector and using seals to clamp and fix the terminal posts to the base plate, the high cost and space occupation caused by welding are solved, thus improving the energy density of the battery.

CN122246387APending Publication Date: 2026-06-19SUNWODA MOBILITY ENERGY TECHNOLOGY CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SUNWODA MOBILITY ENERGY TECHNOLOGY CO LTD
Filing Date
2026-04-28
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

The connection between the current collector and the terminal post of existing large-diameter cylindrical batteries relies on laser welding or resistance welding, which results in high equipment costs, complex manufacturing processes, and limits the compact design of the internal structure of the battery cell, thus affecting energy density.

Method used

A through hole is made in the collector plate, and the column body of the electrode post passes through the through hole and abuts against the top cover plate through the seal. The collector plate is clamped and fixed on both sides by the base plate and the seal, eliminating the welding process and increasing the effective space of the electrode assembly.

Benefits of technology

It achieves reliable electrical connections without welding, reduces manufacturing costs, and increases battery energy density.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122246387A_ABST
    Figure CN122246387A_ABST
Patent Text Reader

Abstract

This application relates to the field of batteries and discloses a single-cell battery and a battery pack. The single-cell battery includes a casing, an electrode assembly, a current collector, and a top cover assembly. The current collector is electrically connected to the electrode assembly and has a first through hole. The top cover assembly includes a top cover plate, a terminal post, and a sealing element. The top cover plate has a second through hole. The terminal post includes a column body and a base plate connected to each other. The column body has the first and second through holes sequentially through it along a first direction. The base plate abuts against the side of the current collector facing the electrode assembly, and a portion of the sealing element abuts against the side of the current collector facing the top cover plate. By clamping and securing the current collector on both sides along the first direction using the base plate and the sealing element, a reliable electrical connection and fixation between the current collector and the terminal post is achieved, while completely eliminating the laser welding or resistance welding process required in traditional solutions. This eliminates the need to reserve welding height and space for welding structures between the current collector and the terminal post.
Need to check novelty before this filing date? Find Prior Art