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Active material, electrode, secondary battery, battery pack, and vehicle

A technology of active materials and electrodes, applied in the fields of active materials, electrodes, secondary batteries, battery packs and vehicles, can solve problems such as heat generation and fire, and achieve high input and output performance

Active Publication Date: 2018-10-09
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if a battery using a carbon-based negative electrode is repeatedly charged and discharged rapidly, dendrites of lithium metal are deposited on the electrode, and there is a possibility of heat generation and fire due to internal short-circuiting.

Method used

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  • Active material, electrode, secondary battery, battery pack, and vehicle
  • Active material, electrode, secondary battery, battery pack, and vehicle
  • Active material, electrode, secondary battery, battery pack, and vehicle

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0034] According to the first embodiment, an active material including particles of a composite oxide having an orthorhombic crystal structure is provided. The composite oxide has the general formula Li 2+w Na 2-x M1 y Ti 6-zM2 z o 14+δ express. However, M1 is at least one selected from the group consisting of Cs and K. M2 is at least one kind selected from the group consisting of Zr, Sn, V, Nb, Ta, Mo, W, Fe, Y, Co, Mn and Al. M1 may be one element or a plurality of elements. In addition, M2 may be one type of element or a plurality of elements. w is 0≤w≤4. x is 0<x<2. y is 0≦y<2. z is 0<z≦6. δ is -0.5≤δ≤0.5. The particles of the composite oxide have an average crystallite diameter of 50 nm to 90 nm and an average primary particle diameter of 0.1 μm to 0.6 μm.

[0035] The active material may be an active material for batteries.

[0036] The composite oxide contained in the active material according to the first embodiment may be of the general formula Li 2+w ...

no. 4 Embodiment approach

[0238] According to a fourth embodiment, an assembled battery is provided. The assembled battery according to the fourth embodiment includes a plurality of secondary batteries according to the third embodiment.

[0239] In the assembled battery according to the fourth embodiment, the individual cells are arranged electrically connected in series or in parallel, or may be arranged in combination of series connection and parallel connection.

[0240] Next, an example of the assembled battery according to the fourth embodiment will be described with reference to the drawings.

[0241] Figure 7 It is a perspective view schematically showing an example of the assembled battery described in the fourth embodiment. Figure 7 The assembled battery 200 shown in the figure includes five single cells 100 , four bus bars 21 , positive-side leads 22 , and negative-side leads 23 . Each of the five single cells 100 is a secondary battery described in the third embodiment.

[0242] The bus...

no. 5 Embodiment approach

[0246] According to a fifth embodiment, a battery pack is provided. This battery pack includes the assembled battery described in the fourth embodiment. This battery pack may include a single secondary battery according to the third embodiment instead of the assembled battery according to the fourth embodiment.

[0247] The battery pack according to the fifth embodiment may further include a protection circuit. The protection circuit has a function of controlling charge and discharge of the secondary battery. Alternatively, a circuit included in a device using a battery pack as a power source (for example, electronic equipment, an automobile, etc.) may be used as a protection circuit for the battery pack.

[0248] In addition, the battery pack according to the fifth embodiment may further include an external terminal for conducting electricity. The external terminal for energization is used to output current from the secondary battery to the outside and / or to input current ...

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Abstract

An embodiment of the invention relates to active material, a battery, a secondary battery, a battery pack and a vehicle. The active material for the secondary battery and capable of realizing high input / output performance, the secondary battery including the active material, the battery provided with the secondary battery and the vehicle carrying the battery pack are provided. According to one embodiment, there is provided an active material including particles of a composite oxide having an orthorhombic crystal structure and represented by the general formula Li<2+w>Na<2-x>Mi<y>Ti<6-z>M2<z>O<14+Delta>. The particles of the composite oxide have an average crystallite size of 50 nm to 90 nm and an average primary particle size of 0.1 [mu]m to 0.6 [mu]m. M1 is at least one selected from thegroup consisting of Cs and K. M2 is at least one selected from the group consisting of Zr, Sn, V, Nb, Ta, Mo, W, Fe, Y, Co, Mn, and Al. w falls within 0<=w<=4, x falls within 0<x<2, y falls within 0<=y<2, z falls within 0<z<6, and Delta falls within -0.5<=Delta<=0.5.

Description

technical field [0001] Embodiments of the present invention relate to an active material, an electrode, a secondary battery, a battery pack, and a vehicle. Background technique [0002] In recent years, research and development of secondary batteries such as lithium-ion secondary batteries and non-aqueous electrolyte secondary batteries have been widely carried out as high-energy-density batteries. Secondary batteries are expected as power sources for hybrid vehicles, electric vehicles, uninterruptible power supplies for cellphone bases, and the like. Therefore, secondary batteries are required to be excellent in other characteristics such as rapid charge and discharge characteristics and long-term reliability in addition to high energy density. For example, a secondary battery that can be quickly charged and discharged not only greatly shortens the charging time, but also enables the improvement of power performance of hybrid vehicles and the like and efficient recovery of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M10/0525B82Y30/00H01M50/204
CPCC04B35/01H01M4/02H01M4/485B82Y30/00H01M10/0525H01M2220/20H01M2004/021H01M50/204C01G23/005C01G33/006C01P2002/72C01P2002/77C01P2002/60C01P2004/03C01P2004/62C01P2006/10C01P2006/12C01P2006/40B60L58/12B60L58/21B60L50/64H01M2004/027Y02P20/133Y02E60/10Y02T10/70
Inventor 手岛史裕原田康宏伊势一树高见则雄
Owner KK TOSHIBA
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