Power tool battery pack wireless charger

Patent metadata

Field	Value
Publication number	US-10199856-B2
Application number	US-201715656321-A
Country	US
Kind code	B2
Filing date	Jul 21, 2017
Priority date	Jun 18, 2012
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

A power tool system includes a power tool, a power tool battery pack and a battery pack charger. The power tool battery pack is separable from and attachable to the power tool, and electrically connectable to the power tool electrical terminals when attached to the power tool. The power tool battery pack has at least one battery cell, a receiver coil, and a control circuit for controlling the amount of power that is provided to the at least one battery cell. The battery pack charger has at least one transmitter coil for generating a magnetic field which induces a voltage in the receiver coil, and a control circuit for controlling the amount of power that is provided to the transmitter coil.

First claim

The invention claimed is:

1. A power tool battery pack comprising:
a housing having first and second walls;
at least one rechargeable battery cell disposed within the housing;
a first receiver coil disposed within the housing for receiving a magnetic field generated by a wireless charger, a voltage induced in the first receiver coil being used to charge the at least one rechargeable battery cell;
a control circuit connected to the first receiver coil for controlling the amount of electric power that is provided to the at least one rechargeable battery cell; and
a communication circuit connected to the control circuit for providing control information to the wireless charger, wherein the communication circuit modulates a reflected load signal.

2. The power tool battery pack of claim 1 , wherein a rectifying circuit is connected to the first receiver coil.

3. The power tool battery pack of claim 1 , further comprising a second receiver coil disposed within the housing.

4. The power tool battery pack of claim 3 , wherein the first and second receiver coils are disposed adjacent to first and second walls, respectively.

5. The power tool battery pack of claim 3 , wherein the second receiver coil receives a magnetic field generated by the wireless charger, a voltage induced in the second receiver coil being used to charge the at least one rechargeable battery cell.

6. The power tool of claim 5 , wherein the control circuit is connected to the second receiver coil.

Assignees

• Black & Decker Inc

Inventors

• Ashinghurst Jeremy D
• Bailey Rouse Roby
• Busschaert Jason F
• Eshleman Scott J
• Murthy Sankarshan
• Potter Christine H
• Puzio Daniel
• Schell Craig A

Classifications

• H02J50/80

  involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices · CPC title

• H02J50/12

  of the resonant type · CPC title

• H02J7/42

  with electronic devices having internal batteries, e.g. mobile phones · CPC title

• H02J7/70 Primary

  characterised by the mechanical construction · CPC title

• H02J2007/0096

  Electricity · mapped topic