Secondary battery, battery pack, and vehicle

A secondary battery and battery pack technology, applied in the direction of secondary battery, secondary battery charging/discharging, battery/battery traction, etc., can solve problems such as unstable operation, and achieve high energy density, charging and discharging efficiency and service life The effect of excellent performance, low cost and safety

Active Publication Date: 2017-09-26
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, with such a battery, the operation is unstable and satisfactory charge and discharge are impossible

Method used

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  • Secondary battery, battery pack, and vehicle
  • Secondary battery, battery pack, and vehicle
  • Secondary battery, battery pack, and vehicle

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0025] A lithium secondary battery according to an embodiment includes a positive electrode, a negative electrode, and an electrolytic solution. The negative electrode includes a negative electrode current collector containing zinc element, and a negative electrode layer arranged on the negative electrode current collector. The negative electrode layer includes a negative electrode active material containing at least one compound selected from the group consisting of titanium oxide, lithium titanium oxide, and lithium titanium composite oxide. The electrolytic solution contains an aqueous solvent and an electrolyte.

[0026] The lithium secondary battery may further include a separator and a container for accommodating a positive electrode, a negative electrode, and an electrolytic solution.

[0027] Hereinafter, the negative electrode, the positive electrode, the electrolytic solution, the separator, and the container will be described in detail.

[0028] 1) Negative electr...

no. 2 Embodiment approach

[0123] According to the second embodiment, it is possible to provide an assembled battery using a secondary battery as a unit cell. As the secondary battery, the lithium secondary battery of the first embodiment can be used.

[0124] As an example of the assembled battery, an assembled battery including a plurality of unit cells electrically connected in series or in parallel as a constituent unit, a unit including a plurality of unit cells electrically connected in series, or a unit composed of A battery pack or the like of a unit composed of a plurality of unit cells electrically connected in parallel.

[0125] A battery pack may also be housed in the frame. As the frame body, a metal can, a plastic container, or the like made of aluminum alloy, iron, stainless steel, zinc, or the like can be used. In addition, the plate thickness of the container is preferably set to 0.5 mm or more.

[0126] Examples of the form in which a plurality of secondary batteries are electricall...

no. 3 Embodiment approach

[0130] According to a third embodiment, a battery pack is provided. This battery pack includes the lithium secondary battery of the first embodiment.

[0131] The battery pack of the third embodiment may include one or more lithium secondary batteries (unit cells) of the first embodiment described above. The plurality of lithium secondary batteries that can be included in the battery pack of the third embodiment can be electrically connected in series, in parallel, or a combination of series and parallel. In addition, a plurality of lithium secondary batteries may constitute an electrically connected assembled battery. When a battery pack is constituted by a plurality of secondary batteries, the battery pack of the second embodiment can be used.

[0132] The battery pack of the third embodiment may further include a protection circuit. The protection circuit is a circuit that controls charge and discharge of the lithium secondary battery. Alternatively, a circuit included ...

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Abstract

According to one embodiment, a secondary battery is provided. The secondary battery includes a positive electrode, a negative electrode, and an electrolyte solution. The negative electrode includes a negative electrode current collector including elemental zinc, and a negative electrode layer disposed on the negative electrode current collector. The negative electrode layer includes a negative electrode active material including at least one compound selected from the group consisting of an oxide of titanium, a lithium-titanium oxide, and a lithium-titanium composite oxide. The electrolyte solution includes an aqueous solvent and an electrolyte.

Description

technical field [0001] Embodiments of the present invention relate to a secondary battery, a battery pack, and a vehicle. Background technique [0002] Non-aqueous electrolyte batteries using carbon materials or lithium titanium oxides as negative electrode active materials and layered oxides containing nickel, cobalt, manganese, etc. as positive electrode active materials, especially lithium secondary batteries, have been used as power sources in a wide range of fields. Be practical. In addition, the forms of such nonaqueous electrolyte batteries range from small batteries for various electronic devices to large batteries for electric vehicles and the like. For the electrolytic solution of these lithium secondary batteries, unlike nickel metal hydride batteries or lead storage batteries, a non-aqueous organic solvent mixed with ethylene carbonate, ethyl methyl carbonate, or the like is used. Electrolyte solutions using these solvents have higher oxidation resistance and r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/485H01M10/38H01M4/02H01M4/131H01M4/48H01M10/36H01M50/209H01M50/211
CPCH01M4/485H01M4/662H01M4/667H01M10/38H01M2300/0002H01M10/486H01M50/211H01M50/209H01M4/02H01M4/366H01M4/48H01M4/62H01M10/36H01M10/4207B60L58/21B60L58/24B60L50/66B60L50/64H01M4/661H01M2220/20Y02T10/70Y02E60/10Y02P70/50H01M4/131H01M10/4257H01M4/66H01M50/20H01M50/543H01M10/052B60L7/16H01M10/24H01M10/425H01M10/44
Inventor 松野真辅高见则雄山下泰伸稻垣浩贵
Owner KK TOSHIBA
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