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Non-aqueous electrolyte secondary battery and combined battery

A non-aqueous electrolyte and secondary battery technology, applied in the direction of secondary batteries, small-sized batteries/battery packs, battery electrodes, etc., can solve problems such as difficulty in developing high-output batteries or battery packs, increasing resistance, etc.

Active Publication Date: 2014-08-13
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, installing a protective element increases resistance, which makes it difficult to develop a battery or battery pack with high output

Method used

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  • Non-aqueous electrolyte secondary battery and combined battery
  • Non-aqueous electrolyte secondary battery and combined battery
  • Non-aqueous electrolyte secondary battery and combined battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104]

[0105] The active material is lithium titanate (Li 4 Ti 5 o 12 ), the average particle diameter of its primary particles is 0.5 μm, using N 2 The BET measured specific surface area of ​​the gas is 20m 2 / g; the conductive agent adopts carbon powder, and its average particle diameter is 4 μm; the binder adopts polyvinylidene fluoride (PVdF); these components are configured with a weight ratio of 90:7:3, and dispersed in n-methylpyrrolidone ( NMP) solvent to prepare the slurry. The slurry was coated on an aluminum alloy foil (current collector) having an average crystal particle diameter of 50 μm, an aluminum purity of 99%, and a thickness of 15 μm, dried and pressed, and then cut to produce 83 pieces of 55 m× 86mm and the electrode density is 2.4g / cm 3 the negative pole. A lead wire formed of an aluminum foil having a purity of 99.9% of 5 mm in width, 30 mm in length and 20 μm in thickness was bonded to one end of each negative electrode current collector by ul...

Embodiment 2 to 7

[0114] A square-shaped non-aqueous electrolyte secondary battery was fabricated having the same structure as in Example 1, except that a Sn alloy foil shown in Table 1 below and sandwiched between the negative electrode lead and the negative electrode terminal having the composition shown in Table 1 was used and In alloy foil.

Embodiment 8

[0116] Five square-shaped nonaqueous electrolyte secondary batteries of the same type as in Example 1 were prepared. These secondary batteries are connected in parallel with each other through copper connectors to produce a battery pack.

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Abstract

A non-aqueous electrolyte secondary battery comprising: a metal outer container; an electrode group housed in the metal outer container and including a positive electrode, a negative electrode, and a spacer sandwiched between the negative electrode and the positive electrode, the negative electrode having an active material, It adsorbs lithium ions when it has a potential of 0.4 V or more higher than the electrode potential of lithium; a non-aqueous electrolyte housed in a metal outer container; a positive electrode lead, one end of which is electrically connected to the positive electrode; a negative electrode lead, one end of which is electrically connected to to the negative electrode; a positive terminal attached to the metal outer container and electrically connected to the other end of the positive lead; a negative terminal attached to the metal outer container and electrically connected to the other end of the negative lead; and a Sn alloy film, which is sandwiched between the negative lead and the negative terminal. The Sn alloy film contains Sn and at least one metal selected from the group consisting of Zn, Pb, Ag, Cu, In, Ga, Bi, Sb, Mg and Al.

Description

technical field [0001] The present invention relates to a non-aqueous electrolyte secondary battery and a combined battery. Background technique [0002] Nonaqueous electrolyte batteries using lithium metal, lithium alloys, lithium compounds or carbonaceous materials as negative electrodes are expected as high energy density batteries and high output density batteries, and such batteries are being researched and developed with great enthusiasm. Recently, lithium-ion batteries have been widely put into practical use, wherein the lithium-ion batteries are provided with a positive electrode, which contains LiCoO 2 or LiMn 2 o 4 As an active material, as well as a negative electrode, it contains a carbon material, which absorbs and releases lithium. In addition, regarding the negative electrode, the use of metal oxides and alloys instead of carbon materials is being studied. [0003] Conventionally, a current collector of a generally used negative electrode is formed of copp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/34H01M10/40H01M2/26H01M2/30C22C13/00C22C21/02C22C21/06C22C28/00C22C38/00C22C38/40H01M4/485H01M4/505H01M4/525H01M4/58H01M10/0525H01M50/119H01M50/51H01M50/512H01M50/529H01M50/55H01M50/562H01M50/574
CPCH01M2/30H01M4/485H01M10/0525H01M2/027H01M2/348H01M2/263H01M2/202H01M2/34H01M10/0583Y02E60/122H01M2/0275H01M2/0285Y02E60/10H01M50/545H01M50/581H01M50/562H01M50/512H01M50/51H01M50/55H01M50/574H01M50/119H01M50/572H01M50/531H01M10/052
Inventor 高见则雄稻垣浩贵岸敬
Owner KK TOSHIBA