BACKUP POWER SOURCE DEVICE AND AUTOMOBILE EQUIPPED WITH SAME

• US 20150001926A1
• Filed: 02/08/2013
• Published: 01/01/2015
• Est. Priority Date: 02/22/2012
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Nakamura, Masafumi, Kageyama, Youichi, Azuma, Keiji, Oosawa, Hirohumi
• Granted Patent: US 9,013,056 B2
• Time in Patent Office: Days
• US Class Current: 307/10.1
• CPC Class Codes: B60R 16/033 characterised by the use of electrical cells or batteries for propulsion puposes B60K1/04; supplying batteries to, or removing batteries from, vehicles B60S5/06; testing of charge state G01R31/36
• CPC Class Codes: E05B 77/54 Automatic securing or unlocking of bolts triggered by certain vehicle parameters, e.g. exceeding a speed threshold triggered by vehicle collision E05B77/12
• CPC Class Codes: E05B 81/86 using capacitors
• CPC Class Codes: H02J 2310/46 for ICE-powered road vehicles
• CPC Class Codes: H02J 9/06 with automatic change-over , e.g. UPS systems
• CPC Class Codes: H02J 9/061 for DC powered loads

Abstract

A backup power source device includes the following elements: a capacitor; a charging circuit provided in the charging path of the capacitor and performing step-down operation; a boost circuit provided in the output path of the capacitor; and a door-lock-releasing output terminal connected to the boost circuit.

Claims

1. (canceled)

2. A backup power source device comprising:

a capacitor;

a charging circuit provided in a charging path of the capacitor and performing step-down operation;

a boost circuit provided in an output path of the capacitor; and

a door-lock-releasing output terminal connected to the boost circuit

wherein the boost circuit has a switching element, a choke coil, and a discharge pattern disposed on a first side of a substrate, and

the capacitor is disposed on a second side of the substrate, and series-connected to the switching element and the choke coil.

3-5. -5. (canceled)

6. An automobile comprising:

an automobile body;

a door attached to the automobile body and including a door lock and a door-lock-releasing part;

a battery installed in the automobile body;

a backup power source device connected to the battery and disposed in an interior of the automobile body the backup power source device including;

a capacitor;

a charging circuit provided in a charging path of the capacitor and performing step-down operation;

a boost circuit provided in an output path of the capacitor; and

a door-lock-releasing output terminal connected to the boost circuit;

a vehicle electronic control unit (ECU) for starting the boost circuit of the backup power source device and driving the door-lock-releasing part, using an output of the boost circuit; and

an engine,

wherein the backup power source device further includes a discharging circuit for discharging the capacitor and stopping the discharge in a state where electric charge of the capacitor is left,

in a state where electric power is supplied from the battery to the vehicle ECU, the vehicle ECU starts the discharging circuit depending on a state of whether the engine is started or stopped, and

in a state where no electric power is supplied from the battery to the vehicle ECU, the vehicle ECU starts the boost circuit and drives the door-lock-releasing part, using the output of the boost circuit.

7. An automobile comprising:

an automobile body;

a door attached to the automobile body and including a door lock and a door-lock-releasing part;

a battery installed in the automobile body;

a backup power source device connected to the battery and disposed in an interior of the automobile body the backup power source device including;

a capacitor;

a charging circuit provided in a charging path of the capacitor and performing step-down operation;

a boost circuit provided in an output path of the capacitor; and

a door-lock-releasing output terminal connected to the boost circuit;

a vehicle electronic control unit (ECU) for starting the boost circuit of the backup power source device and driving the door-lock-releasing part, using an output of the boost circuit;

an ignition switch connected between the battery and a side of an input end of the charging circuit of the backup power source device;

a first diode connected between the input end of the charging circuit and an output end of the boost circuit;

a second diode connected between the vehicle ECU and a node of the battery and the ignition switch; and

a third diode connected between the vehicle ECU and the output end of the boost circuit,

wherein a side of a cathode of the first diode is connected to a side of the output end of the boost circuit, and a side of an anode of the first diode is connected to the input end of the charging circuit,

a side of a cathode of the second diode is connected to the vehicle ECU, and a side of an anode of the second diode is connected to a side of the node of the battery and the ignition switch, and

a side of a cathode of the third diode is connected to the vehicle ECU, and a side of an anode of the third diode is connected to the output end of the boost circuit.

8. The automobile of claim 7, further comprising:

a first conductor path for connecting the anode and the cathode of the first diode;

a second conductor path for connecting the anode and the cathode of the second diode; and

a third conductor path for connecting the anode and the cathode of the third diode,

wherein a cross-sectional area of the first conductor path and a cross-sectional area of the third conductor path are smaller than a cross-sectional area of the second conductor path.

9. An automobile comprising:

an automobile body;

a door attached to the automobile body and including a door lock and a door-lock-releasing part;

a battery installed in the automobile body;

a backup power source device connected to the battery and disposed in an interior of the automobile body, the backup power source device including;

a capacitor;

a charging circuit provided in a charging path of the capacitor and performing step-down operation;

a boost circuit provided in an output path of the capacitor; and

a door-lock-releasing output terminal connected to the boost circuit;

a vehicle ECU for driving the door-lock-releasing part, using an output of the boost circuit of the backup power source device;

an ignition switch connected between the battery and a side of an input end of the charging circuit of the backup power source device;

a first diode connected between the input end of the charging circuit and an output end of the boost circuit;

a second diode connected between the vehicle ECU and a node of the battery and the ignition switch;

a third diode connected between the vehicle ECU and the output end of the boost circuit;

a control element for starting the boost circuit; and

a voltage divider circuit connected to the output end of the boost circuit,

wherein a side of a cathode of the first diode is connected to a side of the output end of the boost circuit, and a side of an anode of the first diode is connected to the input end of the charging circuit,

a side of a cathode of the second diode is connected to the vehicle ECU, and a side of an anode of the second diode is connected to a side of the node of the battery and the ignition switch,

a side of a cathode of the third diode is connected to the vehicle ECU, and a side of an anode of the third diode is connected to the output end of the boost circuit,

the boost circuit has a smoothing capacitor connected to the output end of the boost circuit, and

the control element starts the boost circuit in response to a voltage dividing signal supplied from the voltage divider circuit or a signal supplied from the vehicle ECU.