Electrical storage device and construction machine provided with same

• US 9,107,286 B2
• Filed: 03/19/2012
• Issued: 08/11/2015
• Est. Priority Date: 03/30/2011
• Status: Expired due to Fees

• Current Assignee: Komatsu Ltd.
• Original Assignee: Komatsu Ltd.
• Inventors: Tsuchiya, Junichirou, Souda, Akihiko
• Primary Examiner(s): Nguyen, Hoa C
• Assistant Examiner(s): Matey, Michael
• Application Number:
  US13/816,632
• Publication Number:
  US 20130141889A1
• Time in Patent Office: 1,240 Days
• Field of Search: 361/502, 361/434, 361/54, 361/679.02, 361/231, 361/541, 361/728, 361/759, 361/760, 361/821, 29/250.3, 320/166, 320/107, 320/106, 320/110, 320/111, 320/134, 320/157
• US Class Current: 1/1
• CPC Class Codes: E02F 9/0858 Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units E02F9/16, E02F9/18 take precedence
• CPC Class Codes: E02F 9/2091 Control of energy storage means for electrical energy, e.g. battery or capacitors energy recovery arrangements in hydraulic or pneumatic drives E02F9/2217
• CPC Class Codes: H01G 2/04 specially adapted for mounting on a chassis
• CPC Class Codes: H01G 2/103 Sealings, e.g. for lead-in wires; Covers
• CPC Class Codes: H01M 10/42 Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells H01M10/60 takes precedence
• 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 50/233 characterised by physical properties of casings or racks, e.g. dimensions
• CPC Class Codes: H05K 5/0004 comprising several parts forming a closed casing
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

An electric storage device includes a plurality of capacitor cells (electric-power storage cells) and a casing that houses the capacitor cells. The casing includes an inspection window through which a condition display unit provided inside the casing is visually checkable. The inspection window includes a through hole that penetrates the casing, a resin plate that closes the through hole from an inside of the casing, and a seal member that is interposed between the resin plate and an inner surface of the casing around the through hole.

Claims

1. An electric storage device comprising:

a plurality of electric-power storage cells;

a casing that houses the electric-power storage cells; and

a condition display unit provided inside the casing,

wherein the casing comprises an inspection window through which the condition display unit is visually checkable, and

wherein the inspection window comprises;

a through hole that penetrates the casing,

a plate having a transmission property that closes the through hole from an inside of the casing,

a seal member that is interposed between the plate and an inner surface of the casing, the seal member being disposed outside of and surrounding the through hole, and

a bolt that is screwed into the through hole from an outside of the casing, the bolt having a transmission property to thereby allow visual check of the condition display unit through the bolt.

2. The electric storage device according to claim 1, wherein

the plate having a transmission property is a resin plate,

a metal plate is attached to a surface of the resin plate facing the condition display unit, and

the resin plate and the metal plate are fixed to the casing by a shared screw.

3. The electric storage device according to claim 1, wherein

the casing comprises a bulging portion that bulges out from a top surface of the casing,

the bulging portion comprises a recess in a form of a through-cut having a predetermined width and a predetermined depth,

the through hole is provided in the recess, and

a head of the bolt is positioned lower than a top of the bulging portion.

4. A construction machine installed with the electric storage device according claim 1.

5. The electric storage device according to claim 1, wherein the condition display unit includes one or more light emitting diodes (LEDs).

6. The electric storage device according to claim 1, wherein the condition display unit includes a liquid crystal display.

7. The electric storage device according to claim 1, wherein the bolt is transparent.

8. The electric storage device according to claim 1, wherein the bolt includes a head portion and a screw portion, both the head portion and the screw portion having the transmission property to thereby allow visual check of the condition display unit through the head portion and the screw portion of the bolt.

9. An electric storage device comprising:

a plurality of electric-power storage cells;

a casing that houses the electric-power storage cells; and

a means for displaying a condition of the plurality of electric-power storage cells, the means for displaying the condition of the plurality of electric-power storage cells being provided inside the casing,

wherein the casing comprises an inspection window through which the means for displaying the condition of the plurality of electric-power storage cells is visually checkable, and

wherein the inspection window comprises;

a through hole that penetrates the casing,

a plate having a transmission property that closes the through hole from an inside of the casing,

a seal member that is interposed between the plate and an inner surface of the casing, the seal member being disposed outside of and surrounding the through hole, and

a bolt that is screwed into the through hole from an outside of the casing, the bolt having a transmission property to thereby allow visual check of the means for displaying the condition of the plurality of electric-power storage cells through the bolt.

10. The electric storage device according to claim 9, wherein

the plate having a transmission property is a resin plate,

a metal plate is attached to a surface of the resin plate facing the means for displaying the condition of the plurality of electric-power storage cells, and

the resin plate and the metal plate are fixed to the casing by a shared screw.

11. The electric storage device according to claim 9, wherein

the casing comprises a bulging portion that bulges out from a top surface of the casing,

the bulging portion comprises a recess in a form of a through-cut having a predetermined width and a predetermined depth,

the through hole is provided in the recess, and

a head of the bolt is positioned lower than a top of the bulging portion.

12. A construction machine installed with the electric storage device according claim 9.

13. The electric storage device according to claim 9, wherein the means for displaying the condition of the plurality of electric-power storage cells includes one or more light emitting diodes (LEDs).

14. The electric storage device according to claim 9, wherein the means for displaying the condition of the plurality of electric-power storage cells includes a liquid crystal display.

15. The electric storage device according to claim 9, wherein the bolt is transparent.

16. The electric storage device according to claim 9, wherein the bolt includes a head portion and a screw portion, both the head portion and the screw portion having the transmission property to thereby allow visual check of the means for displaying the condition of the plurality of electric-power storage cells through the head portion and the screw portion of the bolt.