BATTERY CHARGING DEVICE FOR A HANDHELD MACHINE TOOL

• US 20140176065A1
• Filed: 12/19/2013
• Published: 06/26/2014
• Est. Priority Date: 12/21/2012
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: REJMAN, Marcin, LOHR, Guenter, MACK, Juergen, KRUPEZEVIC, Dragan
• Application Number:
  US14/134,662
• Publication Number:
  US 20140176065A1
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/00047 with provisions for charging different types of batteries
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence

Abstract

A battery charging device of a handheld machine tool has a primary inductive charging unit provided to charge handheld machine tool battery devices using at least two different nominal voltages.

Claims

1. A battery charging device of a handheld machine tool, comprising:

a primary inductive charging unit provided to charge at least two battery devices of the handheld machine tool, using at least two different nominal voltages.

2. The battery charging device as recited in claim 1, wherein the primary inductive charging unit charges at least three battery devices of the handheld machine tool using at least three different nominal voltages.

3. The battery charging device as recited in claim 2, wherein the primary inductive charging unit has at least three charge coils which provide different nominal voltages to charge the at least three battery devices.

4. The battery charging device as recited in claim 3, wherein the primary inductive charging unit actuates a selected one of the three charge coils as a function of a selected one of the three battery devices to be charged.

5. The battery charging device as recited in claim 2, further comprising:

at least one processing unit provided to analyze at least one parameter of a nominal voltage of a selected one of the at least three battery devices.

6. The battery charging device as recited in claim 5, wherein the processing unit analyzes at least one of (i) a cell number of a storage cell unit of the selected one of the at least three battery devices, and (ii) a type of circuit of an electronic unit of the selected one of the at least three battery devices.

7. A system comprising:

at least one first battery device of a handheld machine tool;

at least one second battery device of the handheld machine tool; and

a battery charging device having a primary inductive charging unit provided to inductively charge the at least two battery devices of the handheld machine tool using at least two different nominal voltages.

8. The system as recited in claim 7, wherein the first battery device has a secondary inductive charging unit including a first charge coil, and the second battery device has a secondary inductive charging unit having a second charge coil which differs from the first charge coil of the first battery device.

9. The system as recited in claim 8, wherein dimensions of the second charge coil of the second battery device differ from dimensions of the first charge coil of first battery device.

10. The system as recited in claim 9, wherein at least one cell unit of at least one of the first and second battery devices includes at least one cell element using a voltage of at least approximately 3.6 Volts.