Discharge circuit and power storage device
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsTakahiro Kudo, Yoshimitsu Odajima, Yohsuke Mitani
Life of this patent
Estimating the term…
Abstract
A discharge circuit includes: a first transistor connected to power storage; an operational amplifier for controlling an output current of the first transistor; and the current mirror circuit connected to the operational amplifier. The current mirror circuit includes a second transistor connected to a non-inverting input terminal of the operational amplifier, and a third transistor connected to the power storage.
Claims19
A power storage device comprising a power storage, a discharge circuit, and a controller, the discharge circuit including:
- a first transistor connected to the power storage so that a first input terminal of the first transistor is connected to one end of the power storage;
- an operational amplifier for controlling an output current of the first transistor, the operational amplifier being connected to a second input terminal of the first transistor;
- and
- a current mirror circuit connected to the operational amplifier so that an output terminal of the current mirror circuit is connected to the operational amplifier, an input terminal of the current mirror circuit being connected to the one end of the power storage via a zener diode, wherein:
- the current mirror circuit includes a second transistor connected to the operational amplifier and a third transistor connected to the power storage,
- an output terminal of the second transistor is connected to a first input terminal of the operational amplifier,
- an input terminal of the third transistor is connected to the one end of the power storage via the zener diode,
- a first input terminal of the controller is connected to the one end of the power storage,
- an output terminal of the controller is connected to a second input terminal of the operational amplifier, and
- the discharge circuit further includes a reference power supply for supplying a current to the second transistor.
A discharge circuit including a power storage connection terminal to be connected to a power storage and two controller connection terminals to be connected to a controller, the discharge circuit comprising:
- a first transistor connected to the power storage connection terminal so that a first input terminal of the first transistor is connected to the power storage connection terminal;
- an operational amplifier for controlling an output current of the first transistor, the operational amplifier being connected to a second input terminal of the first transistor;
- and
- a current mirror circuit connected to the operational amplifier so that an output terminal of the current mirror circuit is connected to the operational amplifier, an input terminal of the current mirror circuit being connected to the power storage connection terminal via a zener diode, wherein:
- the current mirror circuit includes a second transistor connected to the operational amplifier and a third transistor connected to the power storage,
- an output terminal of the second transistor is connected to a first input terminal of the operational amplifier,
- an input terminal of the third transistor is connected to the power storage connection terminal via the zener diode,
- a first connection terminal among the two controller connection terminals is connected to the power storage connection terminal,
- a second connection terminal among the two controller connection terminals is connected to a second input terminal of the operational amplifier, and
- the discharge circuit further includes a reference power supply for supplying a current to the second transistor.
Dependencies are inferred from the claim text.