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Nonaqueous electrolyte battery, battery pack and vehicle

A non-aqueous electrolyte and battery pack technology, which is applied in the direction of non-aqueous electrolyte batteries, non-aqueous electrolyte battery electrodes, organic electrolyte batteries, etc., can solve the problems of reduced cycle life and insufficient reduction resistance of non-aqueous electrolyte batteries, and achieve The effect of excellent cycle performance and high current performance

Active Publication Date: 2008-07-09
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, since the non-aqueous electrolyte solution disclosed in Patent Document 2 has insufficient reduction resistance, the cycle life of the non-aqueous electrolyte battery is reduced.

Method used

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  • Nonaqueous electrolyte battery, battery pack and vehicle
  • Nonaqueous electrolyte battery, battery pack and vehicle
  • Nonaqueous electrolyte battery, battery pack and vehicle

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0046] An example of a nonaqueous electrolyte battery according to an embodiment of the present invention will be described with reference to FIG. 1 and FIG. 2 . FIG. 1 is a schematic cross-sectional view of a flat non-aqueous electrolyte secondary battery according to an embodiment of the present invention. FIG. 2 is a schematic partial cross-sectional view showing in detail the circled portion shown in A in FIG. 1 .

[0047] As shown in FIG. 1 , a flat wound electrode group 6 is housed in a case member 7 . The wound electrode group 6 has a structure in which the separator 5 is interposed between the positive electrode 3 and the negative electrode 4 and they are wound in a spiral shape. A nonaqueous electrolyte is held in wound electrode group 6 .

[0048] As shown in FIG. 2 , the negative electrode 4 is located at the outermost periphery of the wound electrode group 6, and on the inner peripheral side of the negative electrode 4, there are separators 5, positive electrodes...

no. 2 approach

[0182] The battery pack of the second embodiment has a plurality of non-aqueous electrolyte batteries of the first embodiment as unit cells. Each single battery is arranged in series or in parallel to form a battery pack.

[0183] The battery cell of the first embodiment is suitable for making a battery pack, and the battery pack of the second embodiment has excellent cycle performance. This is explained below.

[0184] If the high-current performance and charge-discharge cycle performance of the non-aqueous electrolyte battery are improved, individual differences in battery capacity and individual differences in impedance can be greatly reduced. As a result, for example, in assembled batteries connected in series, it is possible to reduce variations in battery voltage at the time of full charge due to individual differences in battery capacity. Therefore, the battery pack of the second embodiment has excellent controllability of the assembled battery, and can improve cycle ...

no. 3 approach

[0198] The automobile of the third embodiment has the battery pack of the second embodiment. In general, a large current of about 10C or more flows through a battery pack for automotive use. Since the cells of the first embodiment have excellent high-current performance, temperature differences or impedance differences between cells during high-current charging and discharging can be reduced. As a result, since a part of the single cells can be prevented from being overcharged or overdischarged, the battery pack of the second embodiment has excellent cycle performance. Therefore, the automobile of the third embodiment can maintain excellent characteristics of the drive source. Examples of the automobile referred to here include a hybrid electric vehicle with two to four wheels, an electric vehicle with two to four wheels, and a moped bicycle.

[0199] Figures 9 to 11 show a hybrid vehicle in which an internal combustion engine and a battery-driven electric motor are combined...

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Abstract

A nonaqueous electrolyte battery includes a positive electrode, a negative electrode and a nonaqueous electrolyte. The negative electrode contains a titanium-containing oxide. The nonaqueous electrolyte contains a compound having a functional group represented by the formula (1) below and a sultone having an unsaturated hydrocarbon group. [Chem.]

Description

technical field [0001] The present invention relates to a nonaqueous electrolyte battery, a battery pack including the same, and an automobile. Background technique [0002] Non-aqueous electrolyte batteries, which are charged and discharged by moving lithium ions between positive and negative electrodes, are actively being researched and developed as a high energy density battery. [0003] A nonaqueous electrolyte battery using a lithium transition metal composite oxide as a positive electrode active material and a carbonaceous material as a negative electrode active material has been commercialized. Lithium-transition metal composite oxides generally use Co, Mn, Ni, and the like as transition metals. [0004] In recent years, the use of high Li intercalation and deintercalation potentials compared with carbon species (relative to Li / Li + A non-aqueous electrolyte battery in which lithium titanium oxide is about 1.55 V) as the negative electrode active material has been p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/40H01M4/02H01M4/58H01M4/48H01M6/16H01M4/13H01M4/36H01M4/485H01M10/0525H01M10/0567H01M10/0569
CPCY02T10/6239Y02T10/6217B60K6/46H01M2300/004H01M4/131B60K6/28H01M10/0525B60K6/48B60Y2200/12H01M10/0569H01M10/0567B60K6/445H01M4/485H01M2004/027Y02E60/122H01M4/366H01M2004/021Y02T10/6221Y02E60/10Y02T10/62Y02P70/50H01M4/62H01M2220/20
Inventor 稻垣浩贵藤田有美高见则雄
Owner KK TOSHIBA
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