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Battery and electronic device

Foreign code F190009728
Posted date Mar 29, 2019
Country United States of America
Application number 201816020500
Gazette No. 20180315989
Gazette No. 10741824
Date of filing Jun 27, 2018
Gazette Date Nov 1, 2018
Gazette Date Aug 11, 2020
Priority data
  • P2015-255668 (Dec 28, 2015) JP
  • 2016JP57496 (Mar 10, 2016) WO
Title Battery and electronic device
Abstract A battery includes a main body having a space therein, and including a channel communicating between an outside and the space; a pair of electrodes adjoining the space; and a valve that closes the channel responsive to pH.
Outline of related art and contending technology BACKGROUND
Batteries are known, which are introduced to the digestive tract of a living body where a fluid in the digestive tract functions as an electrolyte, to generate electric power. For example, the battery disclosed in Patent Document 1 includes a space to which a fluid is to enter, and a channel communicating between the space and the outside of the battery. The gastric fluid are used as a fluid acting as an electrolyte.
Scope of claims [claim1]
1. A battery comprising:
a main body having a space therein, and having a channel communicating between an outside of the main body and the space;
a pair of electrodes adjoining the space; and
a valve that closes the channel in response to a predetermined range of the pH external to the space.

[claim2]
2. The battery according to claim 1, wherein the valve comprises:
a valve seat;
a support that is dissolved in response to the predetermined range of the pH external to the space; and
a valve member that is biased toward the valve seat and supported by the support at a location distant from the valve seat, and closes the channel by contacting the valve seat upon the dissolution of the support.

[claim3]
3. The battery according to claim 1, wherein the valve comprises:
a valve seat;
a volume changing body that undergoes a volume change in response to the predetermined range of the pH external to the space; and
a valve member that is supported by the main body with contacting the volume changing body, and closes the channel by contacting the valve seat upon the volume change of the volume changing body.

[claim4]
4. The battery according to claim 1, wherein the valve is disposed at the channel, and comprises a volume changing body that closes the channel by undergoing a volume increase in response to the predetermined range of the pH external to the space.

[claim5]
5. The battery according to claim 4, wherein at least a part of the main body is made from optically transmissive material such that the volume changing body is irradiated with light through at least the part of the main body.

[claim6]
6. The battery according to claim 1, wherein the valve closes the channel when the pH external to the space is higher than a predetermined threshold.

[claim7]
7. The battery according to claim 1, wherein the valve closes the channel once a fluid has been introduced to the space through the channel, when the pH external to the space is lower than a predetermined threshold.

[claim8]
8. The battery according to claim 1, further comprising a film that coats at least a part of the main body, and is dissolved in response to the predetermined range of the pH external to the space.

[claim9]
9. An electronic device comprising:
a battery that generates electric power; and
a circuit that is energized by the generated electric power,
the battery comprising:
a main body having a space therein, and having a channel communicating between an outside of the main body and the space;
a pair of electrodes adjoining the space; and
a valve that closes the channel in response to a predetermined range of the pH external to the space.

[claim10]
10. The electronic device according to claim 9, wherein
the battery is disposed at a first layer, and
the circuit is disposed at a second layer adjacent to the first layer.

[claim11]
11. The electronic device according to claim 10, further comprising a second battery different from the battery as a first battery,
the second battery being disposed at a third layer that is disposed opposite to the first layer relative to the second layer, the second layer being disposed between the first layer and the third layer.
  • Inventor, and Inventor/Applicant
  • HONMA ITARU
  • HYODO HIROSHI
  • NAKAMURA TSUTOMU
  • YOSHIDA SHINYA
  • TOHOKU UNIVERSITY
IPC(International Patent Classification)
Reference ( R and D project ) COI STREAM(COITOHOKU)

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