ELECTRICAL STORAGE UNIT

• US 20120082887A1
• Filed: 02/24/2010
• Published: 04/05/2012
• Est. Priority Date: 06/26/2009
• Status: Active Grant

• Current Assignee: Komatsu Ltd., Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Komatsu Ltd., Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Nishimoto, Susumu, Souda, Akihiko, Ninomiya, Tooru
• Granted Patent: US 9,478,362 B2
• Time in Patent Office: Days
• US Class Current: 429/159
• CPC Class Codes: H01G 11/10 Multiple hybrid or EDL capacitors, e.g. arrays or modules housings, cases, encapsulations or mountings thereof H01G11/78
• 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: H01G 9/08 Housing; Encapsulation
• CPC Class Codes: H01G 9/26 Structural combinations of electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices with each other
• CPC Class Codes: H01M 10/643 Cylindrical cells
• CPC Class Codes: H01M 10/6555 arranged between the cells
• CPC Class Codes: H01M 50/213 adapted for cells having curved cross-section, e.g. round or elliptic H01M50/209, H01M50/216 take precedence
• CPC Class Codes: H01M 50/507 comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
• CPC Class Codes: H01M 50/51 Connection only in series
• CPC Class Codes: H01M 50/516 by welding, soldering or brazing
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors

Abstract

A plurality of electrical storage elements (11) are electrically connected to each other, and parts of the peripheral surfaces of the electrical storage elements (11) contained in concave surfaces (29) are joined to the concave surfaces (29) with double-sided adhesive tape (35), so that the electrical storage elements (11) can be firmly fixed to a holder (27), and heat can be efficiently transferred from the electrical storage elements (11) to the holder (27) through the double-sided adhesive tape (35).

Claims

1. An electrical storage unit comprising:

a plurality of cylindrically-shaped electrical storage elements electrically connected to each other;

a holder made of metal having an arc-like concave surface for containing a part of a peripheral surface of the cylindrically-shaped electrical storage element;

a fix plate attached to the holder so as to hold the electrical storage elements; and

a first joining material placed between the peripheral surface of the electrical storage element and the concave surface of the holder to join the electrical storage element and the holder.

2. The electrical storage unit according to claim 1, wherein the first joining material is double-sided adhesive tape which is made of an insulating material and has a thickness not smaller than a difference between a radius of the concave surface of the holder and a radius of the electrical storage element.

3. The electrical storage unit according to claim 1, wherein the fix plate is made of an insulating material having elasticity, and has an arc-like concave surface for containing another part of the peripheral surface of the cylindrically-shaped electrical storage element.

4. The electrical storage unit according to claim 2, wherein the fix plate is made of metal and has an arc-like concave surface for containing another part of the peripheral surface of the cylindrically-shaped electrical storage element, and

the electrical storage unit further comprises a second joining material which is made of an insulating material and is placed between the peripheral surface of the electrical storage element and the concave surface of the fix plate to join the electrical storage element and the fix plate.

5. The electrical storage unit according to claim 4, wherein the second joining material is double-sided adhesive tape which is made of an insulating material and has a thickness not smaller than a difference between a radius of the concave surface of the fix plate and the radius of the electrical storage element.

6. The electrical storage unit according to claim 2, wherein the first joining material has adhesive portions on two surfaces thereof, the adhesive portion containing a thermal conductive filler.

7. The electrical storage unit according to claim 6, wherein the first joining material is formed so as to be non-uniform in thickness when the electrical storage element is fixed by the holder and the fix plate.

8. The electrical storage unit according to claim 5, wherein the second joining material has adhesive portions on two surfaces thereof, the adhesive portion containing a thermal conductive filler.

9. The electrical storage unit according to claim 8, wherein the second joining material is formed so as to be non-uniform in thickness when the electrical storage element is fixed by the holder and the fix plate.

10. The electrical storage unit according to claim 1, wherein the fix plate has a fin formed on an outer wall surface thereof.

11. The electrical storage unit according to claim 1, wherein the fix plate has an elastic portion formed on at least a portion thereof, the portion contacting the electrical storage element.