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Non-water electrolyte battery

A non-aqueous electrolyte and battery technology, applied in the manufacture of non-aqueous electrolyte batteries, aqueous electrolyte batteries, electrolyte batteries, etc., can solve problems such as short circuit, uneven reaction, increase internal impedance, etc., and achieve high efficiency

Inactive Publication Date: 2004-09-15
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the separator 60 expands, wrinkles are formed on the separator 60, spaces 61 and 62 are generated between the separator 60 and the positive electrode 70 or the negative plate 80, and internal impedance increases.
[0010] In addition, if wrinkles are generated in the separator 60 and spaces 61 and 62 are generated between the separator 60 and the positive electrode 70 or the negative electrode 80, the reactions in the spaces 61 and 62 are not uniform, so dendrites are likely to be generated. internal short circuit due to sudden occurrence of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Using non-woven fabric (thickness 30 μm) 11 made of polyethylene terephthalate (PET) as a reinforcing material, the non-woven fabric 11 made of polyethylene terephthalate (PET) is filled with polystyrene Vinyl fluoride (PVDF) resin 12 is integrally formed to form a separator 10 made of a composite resin film. This separator 10 was used as the composite resin film a of Example 1.

Embodiment 2

[0028] Polypropylene (PP) non-woven fabric (thickness 30 μm) 11 is used as a reinforcing material, and polyvinylidene fluoride (PVDF) resin 12 is filled into the polypropylene (PP) non-woven fabric 11 to form a whole. Separator 10 made of composite resin film. This separator 10 was used as the composite resin film b of Example 2.

Embodiment 3

[0030] Use polyethylene (PE) microporous film (thickness 30 μm) 22 as a reinforcing material, and bond and compound polyvinylidene fluoride (PVDF) resin films 21, 21 on both sides of the polyethylene (PE) microporous film 22 The separator 20 made of a composite resin film is produced. This separator 20 was made into the composite resin film c of Example 3.

[0031] (4) comparative example

[0032] The separator 60 is made of only polyvinylidene fluoride (PVDF) resin film (thickness 30 μm) without reinforcing material (refer to Figure 5 ). This separator 60 was used as a resin film x of a comparative example.

[0033] As the polyvinylidene fluoride mentioned above, a homopolymer of vinylidene fluoride can also be selected, or with more than one kind of vinylidene fluoride selected from vinylidene fluoride, vinylidene trifluoride, vinylidene tetrafluoride, vinylidene fluoride and ethylene. Ethylene copolymer.

[0034] 2. Fabrication of the positive plate

[0035] Lithium-c...

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Abstract

This nonaqueous electrolyte secondary battery has a separator, formed with a composite resin film integrated by filling a reinforcing material layer with a polyvinylidene fluoride resin or a separator formed with a composite resin film, in which a polyvinylidene fluoride resin layer and a reinforcing material layer are laminated. With the polyvinylidene fluoride resin, filled with the reinforcing material layer for integration or the polyvinylidene fluoride resin layer laminated on the reinforcing material layer, the swelling of the polyvinylidene fluoride resin, if swollen, in the cross and longitudinal directions, is restricted by the reinforcing material, wrinkling of the separator will not occur. The present invention provided a nonaqueous electrolyte secondary battery, having reduced internal resistance and superior high-temperature conservation and overcharging characteristics.

Description

technical field [0001] The invention relates to a non-aqueous electrolyte storage battery comprising a negative electrode capable of absorbing and desorbing lithium ions, a positive electrode using a lithium-containing metal oxide as a positive electrode active material, a non-aqueous electrolyte, and a separator separating the positive electrode and the negative electrode. Background technique [0002] In recent years, the miniaturization and weight reduction of electronic equipment have been greatly progressed, and accordingly, there is a great demand for the size and weight reduction of batteries used as power sources. Therefore, non-aqueous dielectric storage batteries represented by lithium batteries are being put into practical use as small, lightweight, high-capacity rechargeable and dischargeable batteries, and are used in portable electronic and communication devices such as small cameras, mobile phones, and notebook computers. [0003] This kind of non-aqueous diel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M6/10H01M10/05H01M10/0525H01M10/0587H01M50/414H01M50/449H01M50/457
CPCH01M2/1653H01M2/1686Y02E60/122H01M2/162H01M4/587H01M2/1666H01M10/0525H01M4/525H01M10/0587H01M6/10Y02E60/10H01M50/449H01M50/44Y02P70/50H01M50/457H01M50/414H01M10/058H01M50/426H01M50/463H01M4/131H01M4/133
Inventor 中沟紫织渡边浩志生川训
Owner SANYO ELECTRIC CO LTD