BATTERY SYSTEM AND ELECTRIC VEHICLE INCLUDING THE SAME

• US 20110104521A1
• Filed: 10/28/2010
• Published: 05/05/2011
• Est. Priority Date: 10/30/2009
• Status: Abandoned Application

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: NISHIHARA, Yoshitomo, OHKURA, Kazumi, KISHIMOTO, Keiji, MURAO, Hiroya
• Application Number:
  US12/914,383
• Publication Number:
  US 20110104521A1
• Time in Patent Office: Days
• US Class Current: 429/7
• CPC Class Codes: B60L 50/64 Constructional details of batteries specially adapted for electric vehicles
• CPC Class Codes: H01M 10/482 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 50/209 adapted for prismatic or rectangular cells H01M50/216 takes precedence
• CPC Class Codes: H01M 50/211 adapted for pouch 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 50/249 specially adapted for aircraft or vehicles, e.g. cars or trains constructional details of batteries specially adapted for electric vehicles B60L50/64
• CPC Class Codes: H01M 50/284 with incorporated circuit boards, e.g. printed circuit boards [PCB]
• CPC Class Codes: H01M 50/569 Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals battery terminal connectors with integrated measuring arrangements G01R31/364
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

In a casing, battery blocks are positioned so that a distance between a printed circuit board attached to an end surface of each of the battery blocks and an end surface opposed to the printed circuit board is greater than a distance between the end surface of the battery block, to which no printed circuit board is attached, and an end surface of the casing, which is opposed to the end surface of the battery block.

Claims

1. A battery system comprising:

one or a plurality of battery blocks each including a plurality of battery cells;

a circuit board corresponding to at least one of said one or plurality of battery blocks and including a voltage detection circuit that detects a voltage between terminals of each of the battery cells in the corresponding battery block; and

a casing that houses said one or plurality of battery blocks and said circuit board,

wherein a plurality of first opposite surfaces opposed to said one or plurality of battery blocks are formed within said casing,

said one or plurality of battery blocks each have a plurality of second opposite surfaces respectively opposed to said plurality of first opposite surfaces,

said circuit board is attached to the second opposite surface of the corresponding battery block, and

a distance between said circuit board and the first opposite surface opposed to said circuit board is greater than a distance between the second opposite surface to which no circuit board is attached and the first opposite surface opposed to the second opposite surface.

2. The battery system according to claim 1, wherein a predetermined gap is provided between said circuit board and said second opposite surface to which the circuit board is attached.

3. The battery system according to claim 1, wherein said circuit board includes an equalization circuit that equalizes the voltages between terminals of said plurality of battery cells in the corresponding battery block.

4. An electric vehicle comprising:

the battery system according to claim 1;

a motor that is driven by electric power from said battery system; and

a drive wheel that rotates by a torque generated by said motor.

5. A battery system comprising:

three or more battery blocks each including a plurality of battery cells, and said three or more battery blocks arranged adjacent to one another at a distance; and

a circuit board corresponding to at least one of said battery blocks and including a voltage detection circuit that detects a voltage between terminals of each of the battery cells in the corresponding battery block,

wherein the two battery blocks adjacent to each other respectively have opposite surfaces opposed to each other,

said circuit board is attached to the opposite surface of the corresponding battery block, and

a distance between said circuit board and the opposite surface opposed to the circuit board is greater than a distance between said opposite surfaces to which no circuit board is attached.

6. The battery system according to claim 5, wherein a predetermined gap is provided between said circuit board and said opposite surface to which the circuit board is attached.

7. The battery system according to claim 5, wherein said circuit board includes an equalization circuit that equalizes the voltages between terminals of said plurality of battery cells in the corresponding battery block.

8. An electric vehicle comprising:

the battery system according to claim 5;

a motor that is driven by electric power from said battery system; and

a drive wheel that rotates by a torque generated by said motor.

9. The battery system according to claim 5, wherein at least two of said plurality of circuit boards are respectively attached to the opposite surfaces of the corresponding battery blocks so as to be opposed to each other, and no circuit board is attached to the at least two other opposite surfaces opposed to each other, and

a distance between said at least two circuit boards is greater than a distance between said other opposite surfaces to which no circuit board is attached.

10. A battery system comprising:

a plurality of battery blocks each including a plurality of battery cells, and said plurality of battery blocks arranged adjacent to one another at a distance;

a circuit board corresponding to at least one of said plurality of battery blocks and including a voltage detection circuit that detect a voltage between terminals of each of the battery cells in the corresponding battery block; and

a casing that houses said plurality of battery blocks and said circuit board,

wherein a plurality of first opposite surfaces respectively opposed to said plurality of battery blocks are formed within said casing,

said plurality of battery blocks have a plurality of second opposite surfaces opposed to said plurality of first opposite surfaces,

the two battery blocks adjacent to each other respectively have third opposite surfaces opposed to each other,

said circuit board is attached to the third opposite surface of the corresponding battery block, and

a distance between said circuit board and the third opposite surface opposed to the circuit board is greater than a distance between the second opposite surface to which no circuit board is attached and the first opposite surface opposed to the second opposite surface.

11. The battery system according to claim 10, wherein a predetermined gap is provided between said circuit board and said third opposite surface to which the circuit board is attached.

12. The battery system according to claim 10, wherein said circuit board includes an equalization circuit that equalizes the voltages between terminals of said plurality of battery cells in the corresponding battery block.

13. An electric vehicle comprising:

the battery system according to claim 10;

a motor that is driven by electric power from said battery system; and

a drive wheel that rotates by a torque generated by said motor.