Supercooling release device, heat storage device and power unit

1. A supercooling release device that releases a supercooled state of a heat storage material, the supercooling release device comprising:

a first member having a concave portion on a surface thereof; and

a second member facing the surface and covering the concave portion, wherein

the surface of the first member is a flat surface,

the second member has a flat surface facing the surface of the first member,

when the flat surface of the first member is brought into surface contact with the flat surface of the second member, the concave portion of the first member is covered with the second member, and

while a load is applied to at least one of the first member and the second member to bring the second member into close contact with the surface of the first member, the supercooled state is maintained.

2. The supercooling release device according to claim 1 , wherein

the concave portion has a groove shape, and

one edge face of the concave portion is exposed outside the first member.

3. The supercooling release device according to claim 2 , wherein

another edge face of the concave portion is exposed outside the first member.

4. The supercooling release device according to claim 2 , wherein

the first member has a through hole extending in a thickness direction thereof, and

another edge face of the concave portion is exposed outside the first member through the through hole.

5. The supercooling release device according to claim 1 , wherein

when the supercooled state is to be maintained, the second member covers the concave portion of the first member to restrict contact between a portion of the heat storage material held in the concave portion and a portion of the heat storage material present outside the concave portion, and

when the supercooled state is to be released, the second member displaces relative to the first member to allow contact between the portion of the heat storage material held in the concave portion and the portion of the heat storage material present outside the concave portion.

6. The supercooling release device according to claim 1 , further comprising:

an elastically deformable third member, wherein

the second member is positioned between the first member and the third member, or the first member is positioned between the second member and the third member.

7. The supercooling release device according to claim 1 , further comprising:

a piston having a surface facing the first member or the second member and configured to apply a load to at least one of the first member and the second member.

8. The supercooling release device according to claim 7 , further comprising:

an actuator connected to the piston and configured to displace the piston in a direction to the first member or the second member and in a direction away from the first member or the second member.

9. The supercooling release device according to claim 8 , further comprising:

a cylinder configured to house the piston and having a screw portion, wherein

the piston has a screw portion that is screwed into the screw portion of the cylinder when the piston is housed in the cylinder, and

the actuator is a motor configured to rotate the piston to displace the piston in the direction to the first member or the second member and in the direction away from the first member or the second member.

10. The supercooling release device according to claim 1 , further comprising:

a cylinder housing the first member and the second member.

11. A heat storage device comprising:

the supercooling release device according to claim 1 ;

a heat storage material including at least one selected from the group consisting of a salt hydrate, a sugar alcohol, and a clathrate hydrate; and

a container housing the heat storage material.

12. A power device comprising:

the heat storage device according to claim 11 ; and

a powertrain configured to receive heat released from the heat storage device.

13. The supercooling release device according to claim 1 , wherein

when the supercooled state is to be released, the load is reduced.

14. The supercooling release device according to claim 1 , wherein

when the supercooled state is to be released, the second member is displaced relative to the first member.

15. The supercooling release device according to claim 14 , wherein

when the supercooled state is to be released, the second member is displaced relative to the first member such that contact is allowed between a portion of the heat storage material held in the concave portion and a portion of the heat storage material present outside the concave portion.

16. The supercooling release device according to claim 1 , wherein

when the supercooled state is to be released, the second member is moved away from the surface.

17. A supercooling release device that releases a supercooled state of a heat storage material, the supercooling release device comprising:

a first member having a concave portion on a surface thereof;

a second member facing the surface and covering the concave portion; and

an elastically deformable third member, wherein

the second member is positioned between the first member and the third member, or the first member is positioned between the second member and the third member, and

while a load is applied to at least one of the first member and the second member to bring the second member into close contact with the surface of the first member, the supercooled state is maintained.

18. A supercooling release device that releases a supercooled state of a heat storage material, the supercooling release device comprising:

a first member having a concave portion on a surface thereof;

a second member facing the surface and covering the concave portion; and

a cylinder housing the first member and the second member, wherein

while a load is applied to at least one of the first member and the second member to bring the second member into close contact with the surface of the first member, the supercooled state is maintained.