Multi-type battery charger control

• US 7,525,280 B2
• Filed: 10/03/2006
• Issued: 04/28/2009
• Est. Priority Date: 05/07/2004
• Status: Expired due to Fees

• Current Assignee: Diversified Power International LLC
• Original Assignee: Diversified Power International LLC
• Inventors: Fagan, Jerry T., Trigiani, Antonio
• Primary Examiner(s): Tso; Edward
• Assistant Examiner(s): BOATENG, ALEXIS ASIEDUA
• Application Number:
  US11/538,206
• Publication Number:
  US 20070080660A1
• Time in Patent Office: 938 Days
• Field of Search: 320/106, 320/110, 320/107, 320/125, 320/160, 320/112, 320/113
• US Class Current: 320/106
• CPC Class Codes: H02J 7/00043 using switches, contacts or markings, e.g. optical, magnetic or barcode
• CPC Class Codes: H02J 7/00047 with provisions for charging different types of batteries

Abstract

An apparatus for selectively charging a variety of batteries. A battery charging system includes a charging circuit, a processor, and a key, or identification device. The key has a value or code associated with the type of battery to be charged. The processor executes a software program that reads the value associated with the key. The software program charges the battery in a manner required by the battery type associated with the key value. In another embodiment, the program checks for changes to the key, such as when an operator swaps the key during charging.

Claims

1. An apparatus for charging a battery, said apparatus comprising:

an identification device associated with a code that identifies a specified charging protocol method, said identification device being a plug-in device releasably connected to a processor, said identification device independent of the battery, said identification device not physically attached to or housed with the battery when said identification device is connected to said processor;

a charger circuit including a power conversion circuit and a switch, said power conversion circuit configured to connect to an external power source, said power conversion circuit having an output providing power to said switch, said switch generating a variable duty cycle pulse width regulation output, said charger circuit configured to electrically connect to the battery;

a processor in communication with said switch, said processor programmed to execute a process for charging the battery, said process including reading a code identifying a specified charging protocol method, selecting a charging protocol corresponding to said code, controlling said switch to charge the battery in a manner determined by said charging protocol, monitoring to detect a replacement of said identification device with the battery remaining connected to said charger circuit, and after detecting said replacement, said process steps of reading said code, selecting said charging protocol, and controlling said switch are performed with a new code associated with a replacement identification device; and

whereby said apparatus applies said charging protocol to the battery by switching in output of said power conversion circuit.

2. The apparatus of claim 1 wherein said identification device is selected from a group including a memory device and a key, said memory device having a memory storage component in communication with said processor, said memory storage component storing said code corresponding to said specified charging protocol method, and said key configured for operating at least one switch in communication with said processor.

3. The apparatus of claim 1 wherein said process further includes monitoring to detect a removal of said identification device with the battery remaining connected to said charger circuit, and after detecting said removal, said process step of controlling said switch is terminated.

4. The apparatus of claim 1 wherein said process executed by said processor further includes monitoring a charge state of the battery being charged by said apparatus.

5. The apparatus of claim 1 wherein said process executed by said processor further includes monitoring a charge state of the battery being charged by said apparatus and terminating charging when said charge state indicates charging is complete.

6. The apparatus of claim 1 further including a means for monitoring a charge state of the battery being charged.

7. The apparatus of claim 1 further including an isolation circuit between said external power source and an output of said charger circuit.

8. The apparatus of claim 1 further including a regulator connected between said power conversion circuit and said switch.

9. A method in a battery charger for charging a battery, said method comprising the steps of:

a) reading a code associated with a first key, said first key being a plug-in device independent of the battery to be charged, said key not physically attached to or housed with the battery during said step of reading;

b) selecting a charging protocol corresponding to said code;

c) controlling a switch to generate a pulse output in accordance with said charging protocol, said switch receiving power from a power conversion circuit, said switch configured to send said pulse output to the battery; and

d) monitoring to detect a removal of said first key and an insertion of a second key having an associated code, said removal occurring without removing the battery, and if said insertion is detected, repeating said steps starting at step a) with said second key being read instead of said first key.

10. The method of claim 9 further including, after said step c), a step of monitoring a charge state of the battery being charged by said apparatus and a step of terminating said pulse output from said switch when said charge state indicates charging is complete.

11. The method of claim 9 further including a step of displaying a status of the battery charger.

12. The method of claim 9 further including a step of isolating a connection to the battery from an external power supply, said power conversion circuit configured to receive power from said external power supply.

13. The method of claim 9 further including a step of regulating power from said power conversion circuit to said switch.

14. A system for charging a battery, said system comprising:

a key associated with a code, said key independent of the battery, said key being a plug-in device received by a receptacle, said key not physically attached to or housed with the battery when said key is received by said receptacle;

a charger circuit including a power conversion circuit and a switch, said power conversion circuit configured to connect to an external power source, said power conversion circuit connected to said switch, said switch configured to generate a variable duty cycle pulse width signal as an output, said switch configured to connect said output to the battery;

a storage component storing said code;

an input/output component communicating with said key and said charger circuit; and

a processing component communicating with said storage component and said input/output component, said processing component executing a process including

reading said code associated with said key,

saving said code in said storage component, and

controlling said switch to charge the battery with a charging protocol corresponding to said code,

monitoring for a change of said key, and

providing for terminating charging if said key is removed while the battery is connected to said switch.

15. The system of claim 14 wherein said process executed by said processing component further includes a step of monitoring for insertion of said key and a step of starting charging when said key is inserted whereby starting charging includes reinitiating said steps of reading, saving, and controlling.

16. The system of claim 14 wherein said key is selected from a group including a memory device and a switch device, said memory device having a memory storage component in communication with said processor, said memory storage component storing said code corresponding to said charging protocol, and said switch device configured for operating at least one switch in communication with said processor.

17. The system of claim 14 wherein said process executed by said processing component further includes a step of monitoring a charge state of a battery being charged by said system.

18. The system of claim 14 wherein said process executed by said processing component further includes a step of monitoring a charge state of a battery being charged by said apparatus and a step of terminating charging when said charge state indicates charging is complete.