Battery charging device

• US 20060261779A1
• Filed: 04/07/2006
• Published: 11/23/2006
• Est. Priority Date: 04/08/2005
• Status: Abandoned Application

• Current Assignee: Creator Teknisk Utveckling AB
• Original Assignee: Creator Teknisk Utveckling AB
• Inventors: Maleus, Borje
• Application Number:
  US11/400,553
• Publication Number:
  US 20060261779A1
• Time in Patent Office: Days
• US Class Current: 320/128
• CPC Class Codes: H02J 7/0018 using separate charge circuits
• CPC Class Codes: H02J 7/1423 with multiple batteries

Abstract

A battery charging device comprising a first DC/DC converter being adapted to increase a voltage of a battery; a first connection means coupled in parallel with the first DC/DC converter; wherein current delivered from the generator is supplied to the battery via the first connection means at a current level above a current level and wherein current delivered from the generator is supplied to the battery via the DC/DC converter at a current level below the current level; and a second DC/DC converter adapted to increase a voltage of a second battery, wherein the current delivered from the generator is supplied to the second battery via the second DC/DC converter.

Claims

1. A battery charging device being arranged to charge at least one battery, comprising:

a first input terminal connectable to a generator;

a first DC/DC converter arranged between said first input terminal and a first output terminal, said first DC/DC converter being adapted to increase a voltage of a first battery;

a first connection means coupled in parallel with said first DC/DC converter;

wherein current delivered from said generator is supplied to said first battery, connected to the charging device at said first output terminal, via said first connection means at a current level above a first current level and wherein current delivered from said generator is supplied to said first battery via said DC/DC converter at a current level below said first current level; and

a second DC/DC converter arranged between a first connection point, between said first DC/DC converter and said first connection means, and a second output terminal adapted to increase a voltage of a second battery, wherein the current delivered from said generator is supplied to said second battery via said second DC/DC converter.

2. The battery charging device according to claim 1 further comprising a second connection means coupled between said second output terminal and said first input terminal.

3. The battery charging device according to claim 2 wherein said second connections means is a diode.

4. The battery charging device according to claim 2 wherein said first connection means is a first relay means and said second connections means is a second relay means.

5. The battery charging device according to claim 1, further comprising voltage measuring means coupled between said first output terminal and said first connection point, between said first DC/DC converter and said first connection means, said voltage measuring means measuring a voltage of the battery connected to said first output terminal.

6. The battery charging device according to claim 5 wherein said voltage measuring means is a shunt.

7. The battery charging device according to claim 5 further comprising control means communicating with said voltage measuring means via a communication bus, said control means adapted to control said voltage measuring means.

8. The battery charging device according to claim 7 wherein said control means communicates with at least one of said first and second DC/DC converters via said communication bus, said control means adapted to control said at least one of said first and second DC/DC converters.

9. The battery charging device according to claim 1 wherein said first connection means is a diode.

10. A battery charging device being arranged to charge at least one battery, comprising:

a first input terminal connectable to a generator;

a first DC/DC converter arranged between said first input terminal and a first output terminal;

a first connection means coupled in parallel with said first DC/DC converter; and

a second connection means coupled in series with said first DC/DC converter and to said first output terminal and a second output terminal.