MONITOR OF ASSEMBLED BATTERY

• US 20110004429A1
• Filed: 02/24/2009
• Published: 01/06/2011
• Est. Priority Date: 02/29/2008
• Status: Active Grant

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Morita, Tsuyoshi, Kawase, Atsushi, Hoshino, Noriko, Kinoshita, Takuya
• Granted Patent: US 8,478,552 B2
• Time in Patent Office: Days
• US Class Current: 702/63
• CPC Class Codes: B60L 3/0069 relating to the isolation, e.g. ground fault or leak current
• 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 10/482 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

A monitor (5) monitors an assembled battery (1) having a plurality of cells (11) and a power supply line (2) for connecting the plurality of the cells (11). The monitor (5) includes: a detecting portion (6) for detecting a voltage of each of the cells (11) of the plurality of the cells (11); and a controlling portion (7) for receiving a voltage detection result detected by the detecting portion (6). The detecting portion (6) converts the voltage detection result into an alternating current communication signal and transmits the alternating current communication signal via the power supply line (2) to the controlling portion (7).

Claims

1. A monitor for monitoring an assembled battery having a plurality of cells and a power supply line for connecting the plurality of the cells, the monitor comprising:

a detecting portion for detecting a voltage of each of the cells of the plurality of the cells; and

a controlling portion for receiving a voltage detection result detected by the detecting portion,

wherein the detecting portion converts the voltage detection result into an alternating current communication signal and transmits the alternating current communication signal via the power supply line to the controlling portion, and the detecting portion has a communication-oriented connector connected to the power supply line via a first condenser.

2. The monitor of the assembled battery according to claim 1, wherein

via the power supply line to the detecting portion, the controlling portion transmits the alternating current communication signal for controlling the detecting portion.

4. The monitor of the assembled battery according to claim 1, further comprising:

a second condenser for connecting each of the detecting portions at a common potential, to thereby define a reference potential of the alternating current communication signal.

5. The monitor of the assembled battery according to claim 1,

wherein the detecting portion further includes a first filter circuit for removing a noise from a power converter which is connected to the assembled battery.

6. The monitor of the assembled battery according to claim 1,

wherein the detecting portion further includes a second filter circuit adapted to remove a noise from a ground fault detecting portion which is connected to the assembled battery and detects a ground fault state of the assembled battery.

7. The monitor of the assembled battery according to claim 1,

wherein the detecting portion further includes a capacity adjusting resistor for adjusting a capacity of the cell.

8. The monitor of the assembled battery according to claim 1,

wherein the detecting portion further includes a memory for memorizing an inherent identifier of the cell which is to be detected.

9. The monitor of the assembled battery according to claim 1, wherein

each of the cells includes:

a bag-like cell outer member which has a joint portion joined with an outer peripheral end portion of each of two sheet-like outer members and which seals therein a generator element, and

a pair of electrode terminals which are electrically connected with the generator element in the cell outer member and which are each led to an outer portion of the cell outer member, and

a circuit element which is so connected to one of the pair of the respective electrode terminals as to detect the voltage of the cell and which implements at least one of transmitting and receiving of the alternating current communication signal with the one of the electrode terminals is disposed at the joint portion of the cell outer member.

10. The monitor of the assembled battery according to claim 9, wherein

the pair of the electrode terminals are respectively led out of end portions of the cell outer members, and

a wiring pattern which connects the circuit element of the detecting portion with the pair of the electrode terminals is so disposed as to be superposed with the generator element.

11. The monitor of the assembled battery according to claim 9, wherein

the pair of the electrode terminals are respectively led out of end portions of the cell outer members, and

a wiring pattern which connects the circuit element of the detecting portion with the pair of the electrode terminals is so disposed at only the joint portion as to avoid a superposition with the generator element.

12. The monitor of the assembled battery according to claim 9, wherein

the detecting portion includes a noise removing circuit element, and

the noise removing circuit element is disposed on the electrode terminal side for implementing the at least one of the transmitting and receiving of the alternating current communication signal.

13. The monitor of the assembled battery according to claim 9, wherein

the detecting portion includes the circuit element on a reference potential side, and

the circuit element on the reference potential side is disposed on the electrode terminal side opposite to the electrode terminal for implementing the at least one of the transmitting and receiving of the alternating current communication signal.

3. (canceled)

14. A method for monitoring an assembled battery having a plurality of cells and a power supply line for connecting the plurality of the cells, the method comprising:

detecting a voltage of each of the cells of the plurality of the cells; and

receiving a voltage detection result detected by the detecting operation,

wherein the detecting operation converts the voltage detection result into an alternating current communication signal and transmits the alternating current communication signal via the power supply line for the receiving operation, and the detecting operation has connecting a communication-oriented connector to the power supply line via a first condenser.

15. A monitor for monitoring an assembled battery having a plurality of cells and a power supplying means for connecting the plurality of the cells, the monitor comprising:

a detecting means for detecting a voltage of each of the cells of the plurality of the cells; and

a controlling means for receiving a voltage detection result detected by the detecting means,

wherein the detecting means converts the voltage detection result into an alternating current communication signal and transmits the alternating current communication signal via the power supplying means to the controlling means, and the detecting means has a communication-oriented connecting means connected to the power supplying means via a first condensing means.