Laminated electric core, preparation method thereof, and lithium-ion battery

Abstract

The disclosure provides a stacked battery cell, a preparation method thereof, and a lithium ion battery. The preparation method includes the following steps: S1: preparing a first battery stack unit, the first battery stack unit is a whole formed by stacking at least two sets of first battery basic units sequentially from bottom to top and compounded by hot pressing , each group of first cell basic units includes a first separator, a first negative electrode sheet, a second separator and a first positive electrode sheet stacked sequentially from bottom to top; S2: Provide at least two first cell stacked units, the first The cell stacking units are stacked sequentially from bottom to top, and the first lower diaphragm, the first outer negative electrode sheet, and the first upper diaphragm are sequentially stacked upward from the top of the first cell stacking unit; S3: put the first cell The core lamination unit, the first lower diaphragm, the first outer negative electrode sheet and the first upper diaphragm are hot-compressed and combined into a whole, so as to obtain a laminated battery cell. Through the above technical solution, the method for preparing a stacked battery cell provided by the present disclosure can improve the production efficiency of the battery cell.

Description

technical field [0001] The present disclosure relates to the technical field of batteries, in particular to a method for preparing a stacked battery cell and the stacked battery cell. Background technique [0002] As people's quality of life is getting higher and higher, and the demand for computers, mobile phones, and electric vehicles continues to increase and improve, lithium-ion batteries with the advantages of high specific energy, long life, safety, and environmental protection have been widely used. [0003] In lithium-ion batteries, the most important component is the cell. According to the different types of lithium-ion batteries, there are many ways to prepare batteries. For example, in cylindrical and cuboid lithium-ion batteries, the winding method is commonly used to produce cells. In pouch batteries, cells are usually produced in a stacked manner. [0004] In the traditional production method of laminated batteries, a diaphragm with a Z-shaped cross section ...

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