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Hot-pressing process and hot-pressing device

A hot-pressing process and hot-pressing device technology, applied in the field of battery manufacturing, can solve the problems of increased equipment and energy consumption costs, inconsistent mechanical properties of winding cores, and prone to wrinkling of winding cores, etc.

Inactive Publication Date: 2020-10-13
HUBEI JINQUAN NEW MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure production capacity, more hot-pressing stations are needed to heat-press the winding core. Multiple hot-pressing stations will not only increase the cost of equipment and energy consumption, but also cause a large waste of energy; The temperature of the hot pressing plate and the lower hot pressing plate is usually between 80°C and 110°C, and the temperature of the upper hot pressing plate and the lower hot pressing plate is higher. The rapid temperature change makes the internal mechanical properties of the core inconsistent, and the core is prone to wrinkles

Method used

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Embodiment Construction

[0025] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only the technical solutions of the present invention. Some, but not all, embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a d...

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Abstract

The invention relates to the technical field of battery manufacturing, and discloses a hot-pressing process and a hot-pressing device. The hot-pressing process comprises the following steps of: winding a positive plate, a negative plate and a diaphragm to form a roll core; placing the roll core on a logistics line, and conveying the roll core to a hot-pressing station through the logistics line; heating the roll core on the logistics line for a preset time at a preset temperature; and carrying out hot pressing treatment on the heated roll core. By means of the technical schemes of the invention, the hot pressing process can shorten the hot pressing time, promote uniform stress distribution in the roll core and reduce wrinkles in the roll core.

Description

technical field [0001] The invention relates to the technical field of battery manufacturing, in particular to a hot-pressing process and a hot-pressing device. Background technique [0002] At present, in the conventional production process of lithium batteries, after the positive electrode sheet, negative electrode sheet and separator are wound to form a winding core, the winding core needs to be hot-pressed before entering the assembly line for assembly. Only after hot pressing can the thickness of the winding core be flat, and the pole piece and the diaphragm be tightly bonded. [0003] At present, the winding core is directly heat-pressed after winding, and the heat-press time in this process is usually between 60s-120s, and the heat-press time is longer. In order to ensure production capacity, more hot-pressing stations are needed to heat-press the winding core. Multiple hot-pressing stations will not only increase the cost of equipment and energy consumption, but als...

Claims

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Application Information

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IPC IPC(8): H01M10/0587H01M10/04
CPCH01M10/0409H01M10/0587Y02E60/10Y02P70/50
Inventor 王雪飞苑丁丁杜双龙吕正中刘金成
Owner HUBEI JINQUAN NEW MATERIALS CO LTD
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