Electrical Storage Device

• US 20110155485A1
• Filed: 09/28/2010
• Published: 06/30/2011
• Est. Priority Date: 12/28/2009
• Status: Active Grant

• Current Assignee: Vehicle Energy Japan, Inc.
• Original Assignee: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd. (Hitachi, Ltd.)
• Inventors: Fujino, Shinichi, TSURUMI, Yoshihisa, Seto, Sadashi
• Granted Patent: US 8,616,311 B2
• Time in Patent Office: Days
• US Class Current: 180/65.1
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

An electrical storage device includes: a conductive battery house casing electrically connected to a chassis; a plurality of battery cells held in the battery house casing; and a control unit that comprises a circuit that manages the plurality of battery cells and is mounted on the battery house casing so that a negative terminal of the circuit and the battery house casing are electrically conducting.

Claims

1. An electrical storage device, comprising:

a conductive battery house casing electrically connected to a chassis;

a plurality of battery cells held in the battery house casing; and

a control unit that comprises a circuit that manages the plurality of battery cells and is mounted on the battery house casing so that a negative terminal of the circuit and the battery house casing are electrically conducting.

2. An electrical storage device according to claim 1, further comprising:

a mounting member that electrically connects and fixes the battery house casing to the chassis.

3. An electrical storage device according to claim 1, wherein:

the battery house casing comprises;

a conductive lower base;

a conductive upper base that is connected to the lower base from above to form a casing body circularly formed with both side surfaces being open; and

side plates that hold the battery cells while closing the both side surfaces of the casing body.

4. An electrical storage device according to claim 1, wherein:

the battery house casing comprises a circular member with both side surfaces being open; and

side plates that hold the battery cells while closing the both side surfaces of the circular member.

5. An electrical storage device according to claim 4, further comprising:

a mounting member that electrically connects and fixes the battery house casing to the chassis.

6. An electrical storage device according to claim 5, further comprising:

a plurality of the battery house casings in which a battery assembly constituted with the plurality of battery cells is housed, wherein;

the control unit is mounted astride a top surface of the plurality of battery house casings.

7. An electrical storage device according to claim 1, wherein:

the battery house casing is formed from die-cast aluminium.

8. An electric powered vehicle, comprising:

a travel drive device that generates travel drive on electric power;

an electrical storage device according to claim 4 that generates the electric power; and

a vehicle body on which the travel drive device is provided, wherein;

the battery house casing is mounted on the vehicle body through a mounting member so that the vehicle body is set to ground potential.

9. An electrical storage device, comprising:

a first and second conductive battery house casings being juxtaposed;

a first and second battery assemblies, each of which is constituted with a plurality of battery cells, that are held in the first and second battery house casings, respectively; and

a control unit that comprises a circuit which manages the first and second battery assemblies and that is mounted on the first and second battery house casings so that a negative terminal of the circuit and the first and second battery house casings are electrically conducting and the first and second battery house casings are integrated.