Charging device and charging method

• US 9,876,384 B2
• Filed: 08/09/2013
• Issued: 01/23/2018
• Est. Priority Date: 05/16/2013
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Liu, Kejing
• Primary Examiner(s): Lin, Sun
• Application Number:
  US14/891,444
• Publication Number:
  US 20160126773A1
• Time in Patent Office: 1,628 Days
• Field of Search: 320108
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/007182 in response to battery voltage
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: H02J 7/345 using capacitors as storage or buffering devices
• CPC Class Codes: H02M 3/155 using semiconductor devices only
• CPC Class Codes: Y02B 40/00 Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Abstract

A charging device is disclosed herein, the charging device comprises: a charging circuit, an energy storage circuit and a control switch, wherein the charging circuit is configured to charge an object to be charged, the energy storage circuit is configured to store energy when the charging circuit is charging the object to be charged and to charge the object to be charged when the charging circuit is in a switch-off state, and the control switch is configured to alternately switch on and switch off the charging circuit according to control commands received periodically, to switch off the energy storage circuit when the charging circuit is switched on and to switch on the energy storage circuit when the charging circuit is switched off. A charging method of the charging device is also disclosed. Technical solution disclosed herein can be applied to improve charging efficiency of a charging device thereby enhancing utilization of the charging device.

Claims

1. A charging device, comprising:

a charging circuit, an energy storage circuit and a control switch, wherein

the charging circuit is configured to charge an object to be charged;

the energy storage circuit is configured to store energy when the charging circuit is charging the object to be charged, and to charge the object to be charged when the charging circuit is in a switch-off state; and

the control switch is configured to alternately switch on and switch off the charging circuit according to control commands received periodically, to switch off the energy storage circuit when the charging circuit is switched on, and to switch on the energy storage circuit when the charging circuit is switched off;

wherein the energy storage circuit comprises an energy storage filter inductor, an energy storage filter capacitor and a rectifier diode, wherein,

one end of the energy storage filter capacitor is connected with one end of the energy storage filter inductor, another end of the energy storage filter capacitor is connected with a cathode of a charging source;

another end of the energy storage filter inductor is connected with an anode of the charging source via the control switch, and is connected with the cathode of the charging source via the rectifier diode;

the rectifier diode cuts off a direction of a current flowing from the anode to the cathode of the charging source.

2. The charging device according to claim 1, wherein the control switch is a transistor power switch;

the another end of the energy storage filter inductor being connected with the anode of the charging source via the control switch comprises;

the another end of the energy storage filter inductor is connected with a collector of the transistor power switch, and an emitter of the transistor power switch is connected with the anode of the charging source.

3. The charging device according to claim 2, wherein the energy storage circuit storing energy comprises:

when the transistor power switch is turned on, the energy storage filter inductor inhibits a current beyond a preset threshold from flowing through the energy storage filter inductor, and converts a current flowing through the energy storage filter inductor into magnetic energy to store;

the energy storage filter capacitor converts a partial current flowing through the energy storage filter inductor into charges to store;

the energy storage circuit charging the object to be charged comprises;

when the transistor power switch is turned off, the energy storage filter inductor converts the stored magnetic energy into a current to continue to charge the object to be charged via the rectifier diode;

the energy storage filter capacitor converts the stored charges into a current to continue to charge the object to be charged.

4. A charging device, comprising:

a charging circuit, an energy storage circuit and a control switch, wherein

the charging circuit is configured to charge an object to be charged;

the energy storage circuit is configured to store energy when the charging circuit is charging the object to be charged, and to charge the object to be charged when the charging circuit is in a switch-off state; and

the control switch is configured to alternately switch on and switch off the charging circuit according to control commands received periodically, to switch off the energy storage circuit when the charging circuit is switched on, and to switch on the energy storage circuit when the charging circuit is switched off;

wherein the energy storage circuit comprises;

a current-limiting capacitor, a current-limiting resistor, a first energy storage capacitor, a second energy storage capacitor, a third energy storage capacitor, a first resistor, a second resistor, a third resistor, a first Zener diode, a second Zener diode, a first diode, a second diode, a transistor and a Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET), wherein

one end of the current-limiting capacitor is connected with one end of the control switch;

another end of the current-limiting capacitor is connected with one end of the current-limiting resistor, an anode of the first diode and a first end of the transistor;

another end of the current-limiting resistor is connected with a cathode of the first Zener diode;

an anode of the first Zener diode is connected with one end of the first resistor and a second end of the transistor respectively;

another end of the first resistor is connected with a cathode of the charging source;

a cathode of the first diode is connected with one end of the first energy storage capacitor, one end of the second resistor, one end of the third resistor and a cathode of the second diode respectively;

another end of the first energy storage capacitor is connected with the cathode of the charging source;

a third end of the transistor is connected with the cathode of the charging source;

a drain of the MOSFET is connected with one end of the third resistor;

a source of the MOSFET is connected with one end of the second resistor and a cathode of the second Zener diode respectively;

an anode of the second Zener diode is connected with the cathode of the charging source;

a gate of the MOSFET is connected with an anode of the second diode, one end of the second energy storage capacitor and one end of the third energy storage capacitor respectively;

another end of the second energy storage capacitor and another end of the third energy storage capacitor both are connected with the cathode of the charging source.

5. The charging device according to claim 4, wherein the energy storage circuit storing energy comprises:

when the control switch is turned on, the second energy storage capacitor and the third energy storage capacitor store charges by using a circuit formed by the second Zener diode, the second resistor, the third resistor and the MOSFET;

the energy storage circuit charging the object to be charged comprises;

when the control switch is turned off, the second energy storage capacitor and the third energy storage capacitor charge the object to be charged by using a circuit formed by the second diode, the second resistor, the third resistor and the MOSFET.

6. A charging method, comprising:

alternately switching on and switching off, by a control switch, a charging circuit according to control commands received periodically;

switching off, by the control switch, an energy storage circuit when the charging circuit is switched on; and

switching on, by the control switch, the energy storage circuit when the charging circuit is switched off;

storing, by the energy storage circuit, energy when the charging circuit is charging an object to be charged, and charging, by the energy storage circuit, the object to be charged when the charging circuit is in a switch-off state;

wherein when the energy storage circuit comprises an energy storage filter inductor, an energy storage filter capacitor and a rectifier diode,

the storing energy by the energy storage circuit comprises;

when a transistor power switch is turned on, inhibiting, by the energy storage filter inductor, a current beyond a preset threshold from flowing through the energy storage filter inductor, and converting, by the energy storage filter inductor, a current flowing through the energy storage filter inductor into magnetic energy to store;

converting, by the energy storage filter capacitor, partial current flowing through the energy storage filter inductor into charges to store;

the charging, by the energy storage circuit, the object to be charged comprises;

when the transistor power switch is turned off, converting, by the energy storage filter inductor, the stored magnetic energy into a current to continue to charge the object to be charged via the rectifier diode;

converting, by the energy storage filter capacitor, the stored charges into a current to continue to charge the object to be charged.

7. A charging method, comprising:

alternately switching on and switching off, by a control switch, a charging circuit according to control commands received periodically;

switching off, by the control switch, an energy storage circuit when the charging circuit is switched on; and

switching on, by the control switch, the energy storage circuit when the charging circuit is switched off;

storing, by the energy storage circuit, energy when the charging circuit is charging an object to be charged, and charging, by the energy storage circuit, the object to be charged when the charging circuit is in a switch-off state;

wherein when the energy storage circuit comprises;

a current-limiting capacitor, a current-limiting resistor, a first energy storage capacitor, a second energy storage capacitor, a third energy storage capacitor, a first resistor, a second resistor, a third resistor, a first Zener diode, a second Zener diode, a first diode, a second diode, a transistor and a Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET),

the storing energy by the energy storage circuit comprises;

when the control switch is turned on, storing, by the second energy storage capacitor and the third energy storage capacitor, charges by using a circuit formed by the second Zener diode, the second resistor, the third resistor and the MOSFET;

the charging, by the energy storage circuit, the object to be charged comprises;

when the control switch is turned off, charging, by the second energy storage capacitor and the third energy storage capacitor, the object to be charged by using a circuit formed by the second diode, the second resistor, the third resistor and the MOSFET.