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Arc battery cell, arc single cell, arc cell combination structure and manufacturing method

A battery cell and cell technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, and final product manufacturing, etc., can solve the problems of decomposition of battery substances, capacity reduction, and complex processing.

Inactive Publication Date: 2013-11-20
GUANGZHOU FULLRIVER BATTERY NEW TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The arc-shaped battery mentioned in the US patent application US20130136967A1, but the internal structure of the battery is not clear, and it is not clear and specific about how to make the arc-shaped battery. Forcibly pressing the battery into an arc may damage the battery, cause internal short circuit, or Resistance increase, or capacity decrease, or dimensional instability and other consequences; it is necessary to apply a temperature of about 85°C to the battery, the processing is relatively complicated, and may cause the decomposition of the internal substances of the battery and damage the performance of the battery
[0010] There is also arc-shaped lithium battery technology in the prior art, but generally the overall appearance is similar to an arc-shaped battery assembly formed by the combination of existing square and cylindrical battery cells. Suitable for small electronic components
The existing technology does not further disclose the production scheme of the arc-shaped battery. However, the lithium battery itself is a complex electrical product with a complicated internal structure. Forcibly bending it with the help of external force will lead to defects in the life and quality of the battery, which constitutes a safety hazard. Hidden danger

Method used

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  • Arc battery cell, arc single cell, arc cell combination structure and manufacturing method
  • Arc battery cell, arc single cell, arc cell combination structure and manufacturing method
  • Arc battery cell, arc single cell, arc cell combination structure and manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] Attached below figure 2 And Picture 9 The present invention will be described in detail.

[0119] (1) Making lithium battery cells:

[0120] The positive electrode sheet 11 is made: 95%wt (weight percentage, hereinafter expressed as wt) lithium cobalt oxide active material, 3%wt acetylene black conductive material, 2%wt polyvinylidene fluoride binder, and N-methyl Prepare slurry with base pyrrolidone solvent, coat the slurry on the current collector aluminum foil (coated evenly on both sides), heat to remove excess solvent, then press it to a certain thickness with a roller press, and cut it into a rectangular positive electrode of the required size Sheet 11, weld on the positive lug 12. To get Picture 9 The two tabs shown extend from the same end where the battery is bent, follow figure 2 The positive lug 12 is shown extending from a closed end.

[0121] Negative sheet 15 production: use 94%wt of mesophase carbon microspheres, 1%wt of acetylene black conductive material...

Embodiment 2

[0129] Attached below Picture 10 And Picture 11 The present invention will be described in detail.

[0130] (1) Making lithium battery cells:

[0131] The production of positive electrode sheet 11: use 93%wt of lithium iron phosphate active material, 2%wt of acetylene black conductive material, 5%wt of polyvinylidene fluoride binder, prepare slurry with N-methylpyrrolidone solvent, and mix the slurry The material is coated on the current collector aluminum foil (coated evenly on both sides), heated to remove the excess solvent, and then pressed to a certain thickness with a roller press, cut into a rectangular positive electrode sheet 11 of the required size, and welded on the positive electrode lug 12. To get Picture 11 The shown bipolar lugs have one lug from the bent ends of the battery. Picture 10 The positive lug 12 is shown extending from one end of the closed end.

[0132] Negative sheet 15 production: use 95%wt of artificial graphite, 1%wt of acetylene black conductive m...

Embodiment 3

[0140] Attached below Picture 12 And Figure 13 The present invention will be described in detail.

[0141] (1) Making lithium battery cells:

[0142] The production of positive electrode sheet 11: use 96%wt of lithium manganate active material, 2%wt of acetylene black conductive material, 2%wt of polyvinylidene fluoride binder, and prepare slurry with N-methylpyrrolidone solvent. The material is coated on the current collector aluminum foil (coated uniformly on both sides), heated to remove excess solvent, and then pressed to a certain thickness with a roller press, cut into a rectangular positive electrode sheet 11 of the required size, and welded on the positive electrode lug 12. To get Figure 13 The shown bipolar ears protrude from the non-bent end of the battery and need to follow Picture 12 The positive lug 12 is shown protruding from the open end.

[0143] Negative sheet 15 production: use 94%wt of natural graphite, 1%wt of acetylene black conductive material, 5%wt of poly...

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Abstract

The invention discloses an arc battery cell, an arc single cell, an arc cell combination structure and a manufacturing method. According to the invention, the battery cell is required to be bent in the perpendicular direction of a connecting line of opposite open ends, the limit in the arc bending direction is performed, so that the external bending acting force cannot damage an internal structure of the battery, the defects of internal short circuit, increase of the internal resistance, reduction of capacity, unstable size and the like cannot be caused, and the batch production of cells is easy to realized. The bending degree of the battery cell is larger, and the manufactured single cell and cell combination structure can be combined and matched variously, so that diversified designs of the cell product are achieved. The manufacturing method of the battery cell is obtained by adjusting a conventional manufacturing method of the cell, the cell is not required to be heated during bending, and accordingly, the manufacturing method is simpler, practical, efficient and low in manufacturing cost.

Description

Technical field [0001] The present invention relates to the field of lithium batteries, in particular to a battery cell and battery cell with an arc-shaped structure. The present invention also relates to a battery assembly formed by the combination of such arc-shaped lithium battery cells and the arc-shaped lithium battery cell The production method. Background technique [0002] The battery is a commonly used charge and discharge product, which has been widely used in daily life and industrial production. This application is an improvement of battery technology. For the convenience of discussion, the following concepts are firstly defined. [0003] Electric core: includes a positive electrode sheet, a negative electrode sheet, a separator and (or) a positive electrode ear, a negative electrode ear, and a combination formed by winding or lamination. [0004] Battery cell: the cell is packed into a soft package shell, filled with electrolyte, vacuum sealed, formed, and vacuum seale...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 易世明张朋李利
Owner GUANGZHOU FULLRIVER BATTERY NEW TECH
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