Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Tab-free winding type lithium ion battery cell and manufacturing method thereof

A lithium-ion battery, electrodeless ear winding technology, applied in non-aqueous electrolyte battery electrodes, secondary batteries, circuits, etc., can solve the problem of winding batteries not being able to discharge at large currents, achieve good consistency, reduce internal resistance, The effect of long cycle life

Active Publication Date: 2015-12-30
商丘神风能源科技有限公司
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a wound-type lithium-ion battery cell without tabs and its Manufacturing method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Tab-free winding type lithium ion battery cell and manufacturing method thereof
  • Tab-free winding type lithium ion battery cell and manufacturing method thereof
  • Tab-free winding type lithium ion battery cell and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: as Figure 1-4 As shown, a wound-type lithium-ion battery cell without tabs includes a positive electrode sheet 3 , a negative electrode sheet 1 and a separator 5 . The negative electrode sheet 1 includes a coated part and an uncoated blank 2, and the blank 2 is copper foil. And the blank space 2 is located at the bottom of the negative electrode sheet 1 with a width of 0.1mm--18mm. The upper end of the positive plate 3 is provided with a positive tab 4, and the positive tab 4 is an aluminum strip.

[0030] The positive electrode sheet 3, the separator 5 and the negative electrode sheet 1, the separator 5 are stacked in sequence, and the width and length of the negative electrode sheet 1 are ensured to be greater than the width and length of the positive electrode sheet 3 during the lamination process. The tab 4 of the positive electrode sheet 3 is exposed. The length of the diaphragm 5 is greater than the length of the negative electrode sheet 1, the u...

Embodiment 2

[0032] Example 2: A method of manufacturing a wound-type lithium-ion battery cell without tabs, 1), the positive electrode sheet is conventionally coated with a coating machine, and the negative electrode sheet is coated horizontally on both sides of the negative electrode sheet with a coating machine. Coating is carried out in the way of longitudinal intermittent coating to ensure that the negative electrode sheet can leave a blank space without coating in the vertical direction. The blank space is copper foil, and the width of the blank space is 01.mm-18mm.

[0033] 2) Cutting the coated positive electrode and negative electrode to form a strip-shaped electrode to ensure that there is a certain width of blank space at the bottom of the strip-shaped negative electrode, and the blank strips on both sides of the strip-shaped negative electrode are aligned; and The positive tab is welded to the upper end of the positive plate.

[0034] 3) The distance between the positive electr...

Embodiment 3

[0039] Embodiment 3: A manufacturing method of a wound-type lithium-ion battery cell without tabs. In the present invention, a cylindrical 18650 lithium-ion battery cell is taken as an example for specific description. According to the above method, the wound-type lithium-ion battery without tabs is produced as sample 1, and the specific process is as follows:

[0040] 1) The positive electrode sheet is prepared with slurry according to the conventional batching process, and then the prepared slurry is coated with a coating machine according to the process designed by 18650 to ensure that the thickness of the positive electrode sheet is 12 μm and the density of one side is 10mg / cm 2, the density of both sides is 20mg / cm 2 .

[0041] Negative plate installation The conventional batching process is used to configure the slurry, and then the prepared slurry is coated on both sides of the negative plate in the manner of horizontal continuous coating and vertical intermittent co...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Widthaaaaaaaaaa
Thicknessaaaaaaaaaa
Single sided densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a tab-free winding type lithium ion battery cell and a manufacturing method thereof. The tab-free winding type lithium ion battery cell comprises a cathode sheet, an anode sheet and diaphragms, the cathode sheet, the diaphragm, the anode sheet and the diaphragm are sequentially stacked and then wound into a cylinder, the anode sheet comprises a coating portion and a blank without a coating, and the blank is located at the bottom of the anode sheet; the upper end of the cathode sheet is provided with a cathode tab; the blank of the anode sheet stretches out of the diaphragms to be exposed and is inwards and tidily folded on a cylindrical hole core. According to the tab-free winding type lithium ion battery cell and the manufacturing method thereof, the anode sheet does not use an anode tab any more, the mode that the blank is reserved at the bottom end of the anode sheet is adopted, and the blank stretches out of the diaphragms and then is tidily folded on the cylindrical hole core; on one hand, it is guaranteed that gaps among the cathode sheet, the anode sheet and the diaphragms meet the specification, and the structure of the anode sheet is simplified, so that industrialized production of the anode sheet can be achieved; on the other hand, the energy density is guaranteed while the internal resistance is reduced, so that the tab-free winding type lithium ion battery cell is long in cycle service life, high in safety, good in consistency and high in large-current discharge performance and can achieve large-scale automatic production.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to a lithium-ion battery core and a method for manufacturing it without tabs. Background technique [0002] With the development of electronic technology, lithium-ion batteries have the advantages of high specific power, long cycle life, good safety performance and no pollution, which make them widely used. At the same time, lithium-ion batteries are developing in the direction of higher energy and higher current. The more common way to make lithium batteries is to use two methods: winding type and laminated type. The current winding manufacturing method is to weld the tabs of the positive and negative pole pieces to one end of the current collector, and then connect them to the casing of the battery. When charging and discharging the battery, the current collector is only connected through the tab. If there are only one or two tabs, and the internal resistan...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01M10/0525H01M4/13
CPCH01M4/13H01M10/0525Y02E60/10
Inventor 潘青海陈娟
Owner 商丘神风能源科技有限公司
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com