Car power source apparatus

• US 20060007622A1
• Filed: 07/05/2005
• Published: 01/12/2006
• Est. Priority Date: 07/06/2004
• Status: Abandoned Application

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Furukawa, Kimihiko, Hashimoto, Masahiko
• Application Number:
  US11/172,823
• Publication Number:
  US 20060007622A1
• Time in Patent Office: Days
• US Class Current: 361/115
• CPC Class Codes: B60R 16/03 for supply of electrical power to vehicle subsystems or for circuit arrangements for charging batteries H02J7/00
• CPC Class Codes: H02J 2310/46 for ICE-powered road vehicles
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0029 with safety or protection devices or circuits
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

The car power source apparatus is provided with a driving battery 1 having a plurality of battery modules 2 connected in series, contactors (electric vehicle battery relay contacts) 6 connected to the output side of the driving battery 1, a control circuit 7 to control the contactors 6 on and off, and a voltage detection circuit 3 to detect voltage of the battery modules 2 of the driving battery 1. Both the control circuit 7 and voltage detection circuit 3 are provided with output voltage detection circuits 7a, 3a to detect contactor 6 output voltage. If the output voltage detection circuit 7a in the control circuit 7 cannot detect contactor 6 output voltage, the output voltage detection; circuit 3a in the voltage detection circuit 3 detects contactor 6 output voltage to determine if a contactor 6 is fused closed.

Claims

1. A car power source apparatus comprising a driving battery having a plurality of battery modules connected in series, contactors connected to the output side of the driving battery, a control circuit to control the contactors on and off, and a voltage detection circuit to detect voltage of the battery modules of the driving battery;

the control circuit is provided with a first output voltage detection circuit to detect contactor output voltage, and the voltage detection circuit is provided with a second output voltage detection circuit to detect contactor output voltage;

wherein

the control circuit puts the contactors in the cut-off state, the first output voltage detection circuit of the control circuit detects output voltage to detect if a contactor is fused closed, if the first output voltage detection circuit of the control circuit cannot detect contactor output voltage, the second output voltage detection circuit of the voltage detection circuit detects contactor output voltage to detect if a contactor is fused closed.

2. A car power source apparatus as recited in claim 1 wherein the voltage detection circuit is provided with input voltage detection circuits to detect contactor input voltage.

3. A car power source apparatus as recited in claim 1 wherein the voltage detection circuit is provided with multiplexers to switch to, and detect voltage of a plurality of battery modules;

and contactor outputs are connected to specified multiplexer channels to establish the second output voltage detection circuit for detecting contactor output voltage.

4. A car power source apparatus as recited in claim 3 wherein the voltage detection circuit is provided with 32 channel multiplexers, and contactor outputs are assigned to specified multiplexer channels to establish the second output voltage detection circuit for detecting contactor output voltage.

5. A car power source apparatus as recited in claim 2 wherein the voltage detection circuit is provided with multiplexers to switch to, and detect voltage of a plurality of battery modules;

and contactor inputs and outputs are connected to specified multiplexer channels to establish input voltage detection circuits for detecting contactor input voltage and the second output voltage detection circuit for detecting contactor output voltage.

6. A car power source apparatus as recited in claim 5 wherein the voltage detection circuit is provided with 32 channel multiplexers, and contactor inputs and outputs are assigned to specified multiplexer channels to establish input voltage detection circuits for detecting contactor input voltage and the second output voltage detection circuit for detecting contactor output voltage.

7. A car power source apparatus as recited in claim 2 wherein the voltage detection circuit is provided with a plurality of voltage detection units, each voltage detection unit is provided with a second output voltage detection circuit for detecting contactor output voltage, and an input voltage detection circuit for detecting contactor input voltage;

and each voltage detection unit detects contactor input and output voltage.

8. A car power source apparatus as recited in claim 7 wherein the voltage detection circuit is provided with two voltage detection units, and each voltage detection unit is provided with a second output voltage detection circuit for detecting contactor output voltage.

9. A car power source apparatus as recited in claim 7 wherein a voltage detection unit is provided with a multiplexer to switch to, and detect voltage of a plurality of battery modules;

and contactor inputs and outputs are connected to specified multiplexer channels to detect contactor input and output voltage.

10. A car power source apparatus comprising a driving battery having a plurality of battery modules connected in series, contactors connected to the output side of the driving battery, a control circuit to control the contactors on and off, and a voltage detection circuit to detect voltage of the battery modules of the driving battery;

the driving battery is made up of a plurality of battery blocks, the voltage detection circuit is made up of a plurality of voltage detection units, voltage detection units are connected to battery blocks, and one voltage detection unit detects the voltage of battery modules that form one battery block;

each voltage detection unit is provided with a multiplexer to switch to the battery module for voltage detection and a voltage detection section to detect the voltage of the connection node switched to by the multiplexer, and the multiplexer switches battery modules to detect the voltage of each battery module; and

contactor outputs are connected to the input side of the multiplexer of each voltage detection unit, and each voltage detection unit detects contactor output voltage.

11. A car power source apparatus as recited in claim 10 wherein contactor inputs and outputs are connected to the input side of the multiplexer of each voltage detection unit, and each voltage detection unit detects contactor input and output voltage.

12. A car power source apparatus as recited in claim 11 wherein the driving battery is made up of two of battery blocks, the voltage detection circuit is made up of two of voltage detection units, voltage detection units are connected to battery blocks, and one voltage detection unit detects the voltage of battery modules that form one battery block

13. A car power source apparatus comprising a driving battery having a plurality of battery modules connected in series, and a voltage detection circuit to detect voltage of the battery modules of the driving battery;

the driving battery is made up of a plurality of battery blocks, the voltage detection circuit is made up of a plurality of voltage detection units, voltage detection units are connected to battery blocks, and one voltage detection unit detects the voltage of battery modules that form one battery block;

each voltage detection unit is provided with a multiplexer to switch to the battery module for voltage detection and a voltage detection section to detect the voltage of the connection node switched to by the multiplexer, and the multiplexer switches battery modules to detect the voltage of each battery module; and

driving battery outputs are connected to the input side of the multiplexer of each voltage detection unit, and each voltage detection unit detects the total voltage of the driving battery.

14. A car power source apparatus as recited in claim 13 wherein the driving battery is made up of two of battery blocks, the voltage detection circuit is made up of two of voltage detection units, voltage detection units are connected to battery blocks, and one voltage detection unit detects the voltage of battery modules that form one battery block.