Battery pack, electricity accumulation system, electronic instrument, electric vehicle, and electric power system

1. A battery pack having an exterior case formed with one or more hole sections, the battery pack comprising:

a battery cell in which a positive electrode terminal section is formed on one end surface thereof and a negative electrode terminal section is formed on the other end surface;

a battery holder having a plurality of battery cell receiving sections receiving the battery cell; and

a metal plate joined to the battery holder and formed with a terminal contact section,

wherein an end of the battery cell receiving sections is opened, and an end section having an opening is formed in the other end of the battery cell receiving sections,

an elastic body having an opening is placed between the one end surface of the battery cell and the end section of the battery cell receiving sections,

a predetermined portion of the elastic body is constricted by an end surface near the positive electrode terminal section and an inner surface of the end section, and

a portion of the elastic body exposed from the opening of the battery cell receiving sections is constricted by the positive electrode terminal section and the metal plate near the terminal contact section.

2. The battery pack according to claim 1 ,

wherein the terminal contact section is formed by drawing the metal plate.

3. The battery pack according to claim 1 ,

wherein one or more protrusion sections are formed on one surface of the elastic body.

4. The battery pack according to claim 3 ,

wherein a plurality of protrusion sections with different thicknesses are formed on a surface pressure-welded to the inner surface in the elastic body and on a surface pressure-welded to the metal plate in the elastic body.

5. The battery pack according to claim 1 ,

wherein one or more protrusion sections are formed on the inner surface of the battery cell receiving section.

6. The battery pack according to claim 1 ,

wherein the opening of the elastic body is smaller than the size of the opening of the end section, and is substantially the same as the size of the terminal contact section.

7. The battery pack according to claim 1 ,

wherein the opening of the elastic body includes a first opening, and a second opening which communicates with the first opening and is smaller than the size of the first opening, the size of the first opening is set to be substantially the same as the size of the terminal contact section, and the second opening is set to be substantially the same as the size of the positive electrode terminal section.

8. An electricity accumulation system, wherein the battery pack according to claim 1 is charged by a power generator which performs power generation from renewable energy.

9. An electricity accumulation system, wherein an electronic instrument connected to the battery pack according to claim 1 is supplied with electric power from the battery pack.

10. An electronic instrument which is supplied with electric power from the battery pack according to claim 1 .

11. An electric vehicle comprising:

a conversion device that is supplied with electric power from the battery pack according to claim 1 and converts the electric power into driving force of a vehicle; and

a control device that performs information processing about a vehicle control based on information about the electricity accumulation system.

12. An electric power system comprising:

an electric power information transmission and reception section that transmits and receives signals to and from another instrument via a network, wherein the system performs charging and discharging control of the battery pack according to claim 1 based on information received by the electric power transmission and reception section.

13. An electric power system which is supplied with electric power from the battery pack according to claim 1 or supplies electric power to the battery pack from a power generator or a power network.