Secondary battery charger and heater

• US 4,081,737 A
• Filed: 05/28/1976
• Issued: 03/28/1978
• Est. Priority Date: 06/03/1975
• Status: Expired due to Term

• Current Assignee: Hiroyasu Miyahara
• Original Assignee: Hiroyasu Miyahara
• Inventors: Miyahara, Hiroyasu
• Primary Examiner(s): Hickey, Robert J.
• Application Number:
  US05/690,876
• Time in Patent Office: 669 Days
• Field of Search: 219/10.57, 219/202, 219/209, 320/2-5, 320/35, 320/36, 320/51, 336/232, 136/161
• US Class Current: 320/107
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: H01M 10/615 Heating or keeping warm
• CPC Class Codes: H01M 10/625 Vehicles
• CPC Class Codes: H01M 10/6554 Rods or plates
• CPC Class Codes: H01M 10/657 by electric or electromagnetic means
• CPC Class Codes: H02J 5/00 Circuit arrangements for transfer of electric power between ac networks and dc networks H02J3/36 takes precedence
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y10S 320/28 Regulating transformer, e.g. high leakage, ferro-resonant

Abstract

A plate of magnetic material is provided in close proximity to a flat transformer in a manner to effectively generate heat due to eddy currents induced in the plate by leakage magnetic flux from the flat transformer, whereby a charger, including the transformer and the plate, can charge a battery while also warming the same.

Claims

1. A secondary battery charger including first terminals connectable to a suitable alternating power source and second terminals connectable to a secondary battery, which charger comprises:

a rectifier connected to one of said second terminals;

a transformer having a primary coil connected to said first terminals and having a second coil connected to said rectifier; and

heating means located in thermal contact with the battery, said heating means comprising a magnetic plate provided in close proximity of said transformer in a manner to effectively generate heat due to eddy currents induced in the plate by leakage magnetic flux from said transformer.

2. A secondary battery charger according to claim 1, further comprising a cover which ensures that said secondary battery charger is liquid tight.

3. A secondary battery charger according to claim 2, in which said cover is made of plastics.

4. A secondary battery charger according to claim 2, in which said cover is made of acid-proof material.

5. A secondary battery charger according to claim 2, further comprising a frame secured to one major surface of said cover.

6. A secondary battery charger according to claim 5, in which said holder frame is L-shaped.

7. A secondary battery charger according to claim 1, in which said rectifier is secured to said magnetic plate in order to dissipate its energy loss in the form of heat in said magnetic plate.