Wireless charging device

• US 9,018,899 B2
• Filed: 01/28/2011
• Issued: 04/28/2015
• Est. Priority Date: 01/28/2011
• Status: Expired due to Fees

• Current Assignee: Kimree Hi-tech Inc.
• Original Assignee: Kimree Hi-tech Inc.
• Inventors: Xiang, Zhiyong
• Primary Examiner(s): Muralidar, Richard V
• Application Number:
  US13/519,859
• Publication Number:
  US 20130300350A1
• Time in Patent Office: 1,551 Days
• Field of Search: 320/108, 320/107, 320/115
• US Class Current: 320/108
• CPC Class Codes: A24F 40/90 Arrangements or methods specially adapted for charging batteries thereof
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 7/00304 Overcurrent protection
• CPC Class Codes: H02J 7/00309 Overheat or overtemperature protection
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence

Abstract

A wireless charging device comprises an electronic switch and a transmitting coil (L1) electrically connected with a power source in sequence. A control end of the electronic switch is connected with a transmitting control unit. The wireless charging device further comprises a current limiting resistance (R1) connected in serial with the transmitting coil. The wireless charging device further comprises a compensation capacitor (C1) connected in parallel with the transmitting coil. An insert total electromagnetic coupling structure is further employed for charging. Such wireless charging device is particularly suitable for electronic cigarette, with low cost, stable and reliable working status and high efficiency, and specific heat sink is not required.

Claims

1. A wireless charging device comprising an electronic switch, a transmitting coil (L1) electrically connected with a power source in sequence, a transmitting control unit connected with a control end of the electronic switch, a current limiting resistance (R1) connected in serial with the transmitting coil, an inserting hole or a sleeve (23) coupled with the transmitting coil (L1) and a photo detector (24) provided in the inserting hole or the sleeve (23) and electrically connected with the transmitting control unit;

the photo detector (24) further includes a light emission component and a light receiving component, wherein when the power source is connected, the light emission component constantly emits lights, and once the light receiving component does not receive lights, the transmitting control unit is started to control charging; and

wherein the wireless charging device is used for charging an electronic cigarette.

2. The wireless charging device according to claim 1, wherein the wireless charging device further comprises a compensation capacitor (C1) connected in parallel with the transmitting coil (L1).

3. The wireless charging device according to claim 2, wherein the compensation capacitor (C1) is a monomer capacitor or a combination capacitor.

4. The wireless charging device according to claim 2, wherein the electronic switch is a surface mounted element, and copper sheets for releasing heat are provided in a region of an internal circuit board corresponding to a heat generation portion of the electronic switch.

5. The wireless charging device according to claim 2, wherein the electronic switch is a direct insertion element mounted closely to heat sinks.

6. The wireless charging device according to claim 1, wherein the electronic switch is a surface mounted element, and copper sheets for releasing heat are provided in a region of an internal circuit board corresponding to a heat generation portion of the electronic switch.

7. The wireless charging device according to claim 1, wherein the electronic switch is a direct insertion element mounted closely to heat sinks.

8. The wireless charging device according to claim 1, wherein the electronic switch is a field-effect switching tube (Q1) or a triode.

9. The wireless charging device according to claim 1, wherein the current limiting resistance (R1) is a monomer resistance or a combination resistance.