HAND TOOL BATTERY INCLUDING A BRIDGE RECTIFIER

• US 20150002081A1
• Filed: 06/26/2014
• Published: 01/01/2015
• Est. Priority Date: 06/28/2013
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: LOHR, Guenter
• Granted Patent: US 9,722,441 B2
• Time in Patent Office: Days
• US Class Current: 320/107
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H02M 7/219 in a bridge configuration
• CPC Class Codes: H02M 7/2195 the switches being synchronously commutated at the same frequency of the AC input voltage
• CPC Class Codes: Y02B 70/10 Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

A hand tool battery includes a charging coil and a bridge rectifier. The bridge rectifier has at least two rectifying arrangements for synchronous rectification.

Claims

1. A hand tool battery, comprising:

a charging coil; and

a bridge rectifier, wherein the bridge rectifier has at least two rectifying arrangements for synchronous rectification.

2. The hand tool battery of claim 1, wherein the bridge rectifier has a shut-off device to switch the at least two rectifying arrangements simultaneously to a passive state at least during a no-load operation.

3. The hand tool battery of claim 2, wherein a same DC voltage potential is present at one power terminal of each of the two rectifying arrangements.

4. The hand tool battery of claim 2, wherein the bridge rectifier includes a control arrangement to generate control signals of the rectifying arrangement.

5. The hand tool battery of claim 4, wherein the control arrangement is configured to adjust the control signals to a switch-off voltage at least during the no-load operation.

6. The hand tool battery of claim 2, wherein the bridge rectifier has at least one voltage limitation device which limits maximum values of control signals of the rectifying arrangement during a rectifying operation.

7. The hand tool battery of claim 6, wherein the voltage limitation device includes at least one voltage reference arrangement.

8. The hand tool battery of claim 2, wherein the shut-off device has at least one switch-off transistor to influence at least the control arrangement as a function of a switch-off signal.

9. The hand tool battery of claim 1, wherein the bridge rectifier includes a control circuit to control the rectifying arrangement as a function of its switching voltage.

10. A circuit, comprising:

a charging coil; and

a bridge having at least two rectifying arrangements for synchronous rectification.