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Non-aqueous electrolyte battery, battery pack and vehicle

A non-aqueous electrolyte and battery pack technology, which is applied in the manufacture of non-aqueous electrolyte storage battery electrodes, non-aqueous electrolyte storage batteries, and electrolyte storage batteries. It can solve the problems of complex component composition and high cost, and achieve good input and output characteristics.

Active Publication Date: 2009-08-05
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are disadvantages in that an electric double layer capacitor is required in addition to a non-aqueous electrolyte battery, and the configuration of the element is complicated, and its cost is also increased.

Method used

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  • Non-aqueous electrolyte battery, battery pack and vehicle
  • Non-aqueous electrolyte battery, battery pack and vehicle
  • Non-aqueous electrolyte battery, battery pack and vehicle

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0041] For an example of the non-aqueous electrolyte battery of the first embodiment, refer to Figure 3 ~ Figure 5 The detailed structure thereof will be described. image 3 It is a sectional view showing a lithium ion secondary battery as an example of the nonaqueous electrolyte secondary battery of the first embodiment. Figure 4 yes means image 3 An enlarged cross-sectional view of part A of . Figure 5 yes image 3 A schematic diagram of the vicinity of the boundary of the layer containing the positive active material, the porous separator, and the layer containing the negative active material in the nonaqueous electrolyte battery.

[0042] Such as image 3 As shown, an electrode group 2 is accommodated in a housing part 1 , for example made of a film. The electrode group 2 has a structure in which a separator 5 is interposed between the positive electrode 3 and the negative electrode 4 and they are wound into a flat shape. Such as Figure 4 As shown, the positive...

no. 2 approach

[0141] The battery pack of the second embodiment has a plurality of non-aqueous electrolyte batteries of the first embodiment. Preferably, the non-aqueous electrolyte battery of the first embodiment is used as a single cell, and the single cells are connected in series or parallel to form a battery pack.

[0142] The nonaqueous electrolyte battery of the first embodiment is suitable as a battery pack, and the battery pack of the second embodiment has excellent cycle characteristics. This is explained below.

[0143] If the retention property of the non-aqueous electrolyte is improved, the entire surface of the negative electrode active material can be brought into contact with the non-aqueous electrolyte, and the lithium ion concentration in the negative electrode active material can be easily made uniform. As a result, overvoltage becomes less likely to occur, that is, local overcharge and overdischarge are less likely to occur, and the utilization rate of the negative elect...

no. 3 approach

[0156] The automobile of the third embodiment has the battery pack of the second embodiment. Examples of the automobile referred to here include two- to four-wheeled hybrid electric vehicles, two- to four-wheeled electric vehicles, moped bicycles, and the like.

[0157] Figures 11 to 13 A hybrid vehicle that combines an internal combustion engine and a battery-driven electric motor as a source of driving power is shown. Regarding the driving force of an automobile, a power source that can provide a wide range of revolutions and torque is required according to its driving conditions. In general, an internal combustion engine exhibits a limited range of torque and number of revolutions in which it exhibits ideal energy efficiency, and the energy efficiency decreases under other operating conditions. A hybrid type of vehicle is characterized in that the overall energy efficiency of the vehicle can be improved by operating the internal combustion engine under optimal conditions...

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Abstract

The present invention provides a non-aqueous electrolyte battery having excellent input-output characteristics at a large current, a battery pack including the non-aqueous electrolyte battery, and an automobile. The non-aqueous electrolyte battery comprises: a positive electrode (3); a negative electrode (4), the negative electrode comprising a negative electrode active material with a Li insertion potential greater than or equal to 0.4V (vs. Li / Li+); configured on the positive electrode (3) and the negative electrode The diaphragm (5) between (4) has a porosity greater than or equal to 50% as measured by the mercury intrusion method, and the median diameter of the voids measured by the mercury intrusion method is larger than the mode diameter, and the above-mentioned a surface roughness of the negative electrode larger than the above-mentioned mode diameter; and a nonaqueous electrolyte.

Description

technical field [0001] The present invention relates to a nonaqueous electrolyte battery, a battery pack using the nonaqueous electrolyte battery, and an automobile using the battery pack. Background technique [0002] Along with the miniaturization of personal computers, video cameras, mobile phones, etc., in the fields of information-related equipment and communication equipment, non-aqueous electrolyte batteries have been put into practical use as power sources used in these equipments because of their high energy density, and been widely popularized. On the other hand, in the field of automobiles, the development of electric vehicles is also being rushed in view of environmental issues and resource issues. A nonaqueous electrolyte battery is also being studied as a power source for this electric vehicle. [0003] Secondary batteries used as power sources for electric vehicles are required to have high energy density, that is, high discharge capacity per unit weight or ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/40H01M4/02H01M2/14B60K6/28B60K6/445B60K6/46B60K6/485B60L9/18B60L11/18B62M7/12B62M23/02H01M4/13H01M4/131H01M4/485H01M4/66H01M10/05H01M10/052H01M10/0525H01M10/058H01M10/0583H01M10/0585H01M50/211H01M50/284H01M50/293H01M50/298H01M50/414H01M50/429H01M50/491
CPCB60L11/1877H01M10/058H01M2/16Y02T10/7005Y02T10/7011H01M2/1077B60L2200/12H01M10/0583Y02T10/7077H01M4/661B60L11/123Y02T10/705B60L11/14Y02T10/6217B60L11/1879H01M2004/021H01M2/1653Y02T10/7022H01M10/0525Y02E60/122H01M4/131B60L50/61B60L50/16B60L50/66B60L50/64Y02E60/10Y02T10/62Y02T10/70Y02T10/7072Y02P70/50H01M50/429H01M50/284H01M50/298H01M50/414H01M50/491H01M50/293H01M50/211H01M4/485H01M50/489H01M4/662H01M50/463H01M2220/20
Inventor 藤田有美稻垣浩贵猿渡秀乡高见则雄
Owner KK TOSHIBA
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