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US 9,960,446 B2Granted
Secondary battery and electronic device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsMinoru Takahashi, Ryota Tajima
Life of this patent
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Abstract
A secondary battery suitable for a portable information terminal or a wearable device is provided. An electronic device having a novel structure which can have various forms and a secondary battery that fits the forms of the electronic device are provided. In the secondary battery, sealing is performed using a film provided with depressions or projections that ease stress on the film due to application of external force. A pattern of depressions or projections is formed on the film by pressing, e.g., embossing.
Claims19
A secondary battery comprising a film,
- wherein the film has a region with a first pattern of depressions or projections and a region without the first pattern of the depressions or the projections,
- wherein the region with the first pattern comprises a portion having a first thickness and a portion having a second thickness,
- wherein sealing is performed using the film,
- wherein the secondary battery has flexibility,
- wherein the secondary battery is a multi-stable flexible secondary battery having at least a first stable condition and a second stable condition,
- wherein the first stable condition is flat,
- wherein the second stable condition is fixed while being bent, and
- wherein the secondary battery deforms repeatedly between the first stable condition and the second stable condition.
5 more elements
A secondary battery comprising a film,
- wherein the film has a region with a first pattern of depressions or projections and a region without the first pattern of the depressions or the projections,
- wherein the region with the first pattern comprises a portion having a first thickness and a portion having a second thickness,
- wherein sealing is performed using the film,
- wherein the depressions or the projections have a first pitch in the portion having the first thickness, and
- wherein the depressions or the projections have a second pitch in the portion having the second thickness.
2 more elements
Dependencies are inferred from the claim text.