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Electrode structure, secondary battery, battery pack and vehicle

An electrode structure, secondary battery technology, applied in secondary batteries, battery/battery traction, secondary battery repair/maintenance, etc., can solve problems such as difficulty in ensuring safety

Active Publication Date: 2018-03-30
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even so, it is difficult to ensure adequate security

Method used

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  • Electrode structure, secondary battery, battery pack and vehicle
  • Electrode structure, secondary battery, battery pack and vehicle
  • Electrode structure, secondary battery, battery pack and vehicle

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0037] According to the first embodiment, an electrode structure is provided. The electrode structure includes a current collector, an active material layer, and a separator layer. The active material layer covers part of at least one surface of the current collector. The separator layer covers the surface of the active material layer, covers at least one surface of the current collector across the first end surface of the active material layer, and has a first end in contact with at least one surface of the current collector. The distance a from the first end surface of the active material layer to the first end of the separator layer, and the distance from the first side where the surface of the active material layer intersects with the first end surface of the active material layer to the surface of the separator layer The b / a ratio of the distance b in the direction parallel to the surface of the current collector is in the range of 0.0001 to 0.5.

[0038] Conventionally...

no. 2 Embodiment approach

[0154] According to the second embodiment, there is provided a secondary battery. This secondary battery includes the electrode structure of the first embodiment. This secondary battery includes, for example, an electrode structure as a negative electrode and a positive electrode. The secondary battery may further include an outer packaging material, a positive terminal, and a negative terminal. When using the electrode structure as a negative electrode or a positive electrode, the current collector and active material described in the first embodiment can be used.

[0155] (outer packing material)

[0156] As an outer packaging material, for example, a laminated film or a metal container can be used.

[0157] The shape of the packaging material includes a flat type (thin type), a square type, a cylindrical type, a coin type, a button type, a sheet type, and a laminated type. The outer packaging material may also have a size consistent with the size of the battery. The ex...

no. 3 Embodiment approach

[0187] According to a third embodiment, a battery pack is provided. This battery pack includes the secondary battery of the second embodiment, and a circuit unit for controlling charging and discharging of the secondary battery.

[0188] The battery pack of this embodiment may include one secondary battery or may include a plurality of secondary batteries. A plurality of secondary batteries that a battery pack may include can be electrically connected in series, in parallel, or in a combination of series and parallel. A plurality of secondary batteries can also constitute a battery pack by being electrically connected. A battery pack can also contain multiple battery packs.

[0189] The battery pack may further include a protection circuit. The protection circuit controls charging and discharging of the secondary battery. Alternatively, a circuit included in a device that uses a battery pack as a power source (for example, an electronic device, an automobile, etc.) can als...

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Abstract

Embodiments of the invention relate to an electrode structure, a secondary battery, a battery pack, and a vehicle. The invention provides the electrode structure which can realize an excellent yield rate, the secondary battery with the electrode structure, the battery pack with the secondary battery, and a vehicle with the battery pack. The electrode structure includes a current collector, a separator layer, and an active material layer including a main surface and a first end face other than the main surface. The active material layer covers a first part of at least one surface of the currentcollector. The separator layer covers the main surface of the active material layer, at least a part of the first end face and second part of the at least one surface of the current collector. The electrode structure satisfies a ratio b / a falling within a range of 0.0001 to 0.5, where a is a distance from the first end face of the active material layer to the first end part of the separator layer, and b is a distance in a direction parallel to the at least one surface of the current collector, which is from a first edge of the active material layer to a surface of the separator layer, the main surface of the active material layer and the first end face of the active material layer intersect at the first edge of the active material layer.

Description

technical field [0001] Embodiments of the present invention relate to an electrode structure, a secondary battery, a battery pack, and a vehicle. Background technique [0002] Non-aqueous electrolyte secondary batteries containing positive and negative electrodes capable of intercalating and deintercalating lithium ions have been widely used in many fields such as electric vehicles, power storage, and information equipment as high-energy-density batteries. Along with this, the demand from the market has further increased, and studies have been actively conducted. [0003] In order to use a nonaqueous electrolyte secondary battery as a power source for an electric vehicle, a high energy density, that is, a high discharge capacity per unit weight or unit volume is required. [0004] On the other hand, the larger the discharge capacity per unit weight or unit volume, the more problematic the safety becomes, and a secondary battery having more excellent safety is demanded. One...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/62H01M10/0525H01M2/34H01M4/13H01M4/02H01M10/0585H01M10/0587H01M50/224H01M50/227H01M50/231H01M50/233H01M50/249H01M50/296
CPCH01M4/13H01M4/366H01M4/628H01M10/0525H01M50/597H01M50/233H01M50/296H01M50/231B60L50/64H01M50/224H01M50/227H01M50/249H01M10/0562Y02E60/10Y02T10/70H01M50/46Y02P70/50H01M2220/20H01M10/0585H01M4/131H01M4/485H01M10/425H01M10/4207H01M4/661H01M4/505H01M4/525H01M4/622B60L50/60H01M2010/4271H01M2300/0037H01M2300/0071H01M50/463H01M50/446H01M4/623H01M4/662H01M10/0563H01M10/0569H01M10/0565H01M2300/002
Inventor 岩崎拓哉杉崎知子原田康宏高见则雄
Owner KK TOSHIBA