POWER STORAGE DEVICE, LIGHT-EMITTING DEVICE, AND ELECTRONIC DEVICE

• US 20160254500A1
• Filed: 02/22/2016
• Published: 09/01/2016
• Est. Priority Date: 02/27/2015
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: KAWATA, Takuya, TAKAHASHI, Kei
• Granted Patent: US 10,755,869 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: H01G 11/78 Cases; Housings; Encapsulations; Mountings
• CPC Class Codes: H01G 11/82 Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
• CPC Class Codes: H01M 2220/30 Batteries in portable systems, e.g. mobile phone, laptop
• CPC Class Codes: H01M 50/105 Pouches or flexible bags
• CPC Class Codes: H01M 50/211 adapted for pouch cells
• CPC Class Codes: H01M 50/24 adapted for protecting batteries from their environment, e.g. from corrosion thermal insulation H01M10/658
• CPC Class Codes: H01M 50/579 in response to shock
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 7/00302 Overcharge protection
• CPC Class Codes: H02J 7/00306 Overdischarge protection
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

To provide a flexible, highly reliable power storage device or light-emitting device. The device includes a battery unit or a light-emitting unit and a member with rubber elasticity. The battery unit includes a secondary battery. The light-emitting unit includes a light-emitting element. The member with rubber elasticity is provided with a first projection and a second projection. The first projection and the second projection are arranged on a first surface of the battery unit or the light-emitting unit. The first projection and the second projection come in contact with each other when the power storage device is bent such that the first surface of the battery unit faces inward.

Claims

1. A power storage device comprising:

a battery unit; and

a first member with rubber elasticity,

wherein the first member with rubber elasticity comprises a first projection and a second projection,

wherein the first projection and the second projection are arranged on a first surface of the battery unit,

wherein the first projection and the second projection come in contact with each other when the power storage device is bent such that the first surface of the battery unit faces inward.

2. The power storage device according to claim 1,

wherein the first surface and a second surface of the battery unit are opposite to each other, and

wherein a second member with rubber elasticity is located on the second surface of the battery unit.

3. The power storage device according to claim 2,

wherein the second member with rubber elasticity comprises a third projection and a fourth projection arranged on the second surface of the battery unit, and

wherein the third projection and the fourth projection come in contact with each other when the power storage device is bent such that the second surface of the battery unit faces inward.

4. The power storage device according to claim 2,

wherein the first member with rubber elasticity and the second member with rubber elasticity are separated from each other.

5. The power storage device according to claim 2,

wherein the first member with rubber elasticity and the second member with rubber elasticity are part of a third member with rubber elasticity.

6. The power storage device according to claim 5,

wherein the battery unit is enclosed within the third member with rubber elasticity.

7. The power storage device according to claim 1,

wherein the power storage device can be reversibly changed in shape from a first state where the first projection and the second projection are not in contact with each other to a second state where the first projection and the second projection are in contact with each other.

8. The power storage device according to claim 1, further comprising:

a power-receiving resonance coil;

a power-receiving coil;

a rectifier circuit; and

a DC-DC converter,

wherein in the power-receiving resonance coil, a high-frequency voltage is induced by magnetic field resonance,

wherein in the power-receiving coil, a high-frequency voltage is induced by electromagnetic induction with the power-receiving resonance coil,

wherein the rectifier circuit rectifies the high-frequency voltage induced in the power-receiving coil, and

wherein a DC voltage output from the rectifier circuit is input to the DC-DC converter.

9. The power storage device according to claim 8,

wherein the DC-DC converter includes an input power determination portion and a voltage conversion portion,

wherein a first DC voltage is input to the input power determination portion,

wherein the voltage conversion portion converts the first DC voltage into a second DC voltage and outputs the second DC voltage,

wherein the input power determination portion includes a load, first means, and second means,

wherein the first means determines a first voltage proportional to the first DC voltage,

wherein the second means determines a second voltage proportional to a current generated in the load,

wherein the voltage conversion portion includes a switch and third means,

wherein the switch controls the current generated in the load by being turned on and off, and

wherein the third means keeps a ratio of the first voltage to the second voltage constant by controlling the switch in accordance with the first voltage and the second voltage.

10. A power storage device comprising:

a battery unit; and

a first member with rubber elasticity,

wherein the first member with rubber elasticity comprises a first projection and a second projection,

wherein the first projection and the second projection are arranged on a first surface of the battery unit,

wherein a cross-sectional shape of the first projection is in contact with three sides of a first isosceles triangle and is included in the first isosceles triangle,

wherein a cross-sectional shape of the second projection is in contact with three sides of a second isosceles triangle and is included in the second isosceles triangle,

wherein the first isosceles triangle and the second isosceles triangle have a same shape, have bases on a same line, and are in contact with each other at one point,

wherein a curvature radius of the first surface of the battery unit is a sum of a shortest distance from the first surface to a bottom surface of the first projection and a length of an equilateral of the first isosceles triangle when the power storage device is bent such that the first surface of the battery unit faces inward,

wherein a first side of the first projection is located on a first equilateral of the first isosceles triangle,

wherein a second side of the second projection is located on a second equilateral of the second isosceles triangle, and

wherein the first equilateral and the second equilateral are in contact with each other at one point.

11. The power storage device according to claim 10,

wherein a second member with rubber elasticity is located on the second surface of the battery unit, and

wherein the first surface and the second surface of the battery unit are opposite to each other.

12. The power storage device according to claim 11,

wherein the second member with rubber elasticity comprises a third projection and a fourth projection arranged on the second surface of the battery unit,

wherein a cross-sectional shape of the third projection is in contact with three sides of a third isosceles triangle and is included in the third isosceles triangle,

wherein a cross-sectional shape of the fourth projection is in contact with three sides of a fourth isosceles triangle and is included in the fourth isosceles triangle,

wherein the third isosceles triangle and the fourth isosceles triangle have a same shape, have bases on a same line, and are in contact with each other at one point,

wherein a curvature radius of the second surface of the battery unit is a sum of a shortest distance from the second surface to a bottom surface of the third projection and a length of an equilateral of the third isosceles triangle when the power storage device is bent such that the second surface of the battery unit faces inward,

wherein a third side of the third projection is located on a third equilateral of the third isosceles triangle,

wherein a fourth side of the fourth projection is located on a fourth equilateral of the fourth isosceles triangle, and

wherein the third equilateral and the fourth equilateral are in contact with each other at one point.

13. The power storage device according to claim 11,

wherein the first member with rubber elasticity and the second member with rubber elasticity are separated from each other.

14. The power storage device according to claim 11,

wherein the first member with rubber elasticity and the second member with rubber elasticity are part of a third member with rubber elasticity.

15. The power storage device according to claim 14,

wherein the battery unit is contained in the third member with rubber elasticity.

16. The power storage device according to claim 10,

wherein the power storage device can be reversibly changed in shape from a first state where the first projection and the second projection are not in contact with each other to a second state where the first projection and the second projection are in contact with each other.

17. The power storage device according to claim 10, further comprising:

a power-receiving resonance coil;

a power-receiving coil;

a rectifier circuit; and

a DC-DC converter,

wherein in the power-receiving resonance coil, a high-frequency voltage is induced by magnetic field resonance,

wherein in the power-receiving coil, a high-frequency voltage is induced by electromagnetic induction with the power-receiving resonance coil,

wherein the rectifier circuit rectifies the high-frequency voltage induced in the power-receiving coil, and

wherein a DC voltage output from the rectifier circuit is input to the DC-DC converter.

18. The power storage device according to claim 17,

wherein the DC-DC converter includes an input power determination portion and a voltage conversion portion,

wherein a first DC voltage is input to the input power determination portion,

wherein the voltage conversion portion converts the first DC voltage into a second DC voltage and outputs the second DC voltage,

wherein the input power determination portion includes a load, first means, and second means,

wherein the first means determines a first voltage proportional to the first DC voltage,

wherein the second means determines a second voltage proportional to a current generated in the load,

wherein the voltage conversion portion includes a switch and third means,

wherein the switch controls the current generated in the load by being turned on and off, and

wherein the third means keeps a ratio of the first voltage to the second voltage constant by controlling the switch in accordance with the first voltage and the second voltage.

19. A light-emitting device comprising:

a light-emitting unit; and

a member with rubber elasticity,

wherein the light-emitting unit includes a light-emitting panel,

wherein the light-emitting panel includes a light-emitting element,

wherein the light-emitting unit is contained in the member with rubber elasticity,

wherein at least part of the member with rubber elasticity transmits light emitted from the light-emitting element,

wherein the member with rubber elasticity comprises a first projection and a second projection,

wherein the first projection and the second projection are arranged on a first surface of the light-emitting unit,

wherein the light-emitting element has a function of emitting light to the second surface side of the light-emitting unit,

wherein the first surface and the second surface of the light-emitting unit are opposite to each other, and

wherein the first projection and the second projection come in contact with each other when the light-emitting device is bent such that the first surface of the light-emitting unit faces inward.

20. The light-emitting device according to claim 19,

wherein the light-emitting unit includes a secondary battery and a circuit,

wherein the secondary battery has a function of supplying power to the light-emitting element, and

wherein the circuit includes an antenna and has a function of charging the secondary battery on the basis of a signal received by the antenna.

21. The light-emitting device according to claim 19,

wherein the secondary battery includes a portion overlapping with the light-emitting panel.

22. The light-emitting device according to claim 20,

wherein the antenna includes a portion overlapping with the light-emitting panel.

23. The light-emitting device according to claim 20,

wherein at least part of the antenna is located between the light-emitting panel and the secondary battery.

24. The light-emitting device according to claim 20,

wherein the light-emitting unit includes a pressure-sensing element, and

wherein the pressure-sensing element is located closer to the second surface than the light-emitting element is.

25. The light-emitting device according to claim 20, further comprising:

a capacitive sensor,

wherein the capacitive sensor is located outside the member with rubber elasticity, and

wherein light emitted from the light-emitting element is extracted to the outside through the sensor.

26. An electronic device comprising:

the light-emitting device according to claim 19; and

a sensor, a housing, a speaker, a microphone, an operation switch, or an operation button.