Reverse battery protection device and operating method thereof

Patent metadata

Field	Value
Publication number	US-9595822-B2
Application number	US-201414533989-A
Country	US
Kind code	B2
Filing date	Nov 5, 2014
Priority date	Jan 27, 2014
Publication date	Mar 14, 2017
Grant date	Mar 14, 2017

Abstract

A reverse battery protection device and an operating method thereof are provided. The reverse battery protection device includes a signal generating unit measuring a voltage of a battery, and, when the measured voltage is not smaller than a reference voltage, generating an electrical signal, a signal converting unit converting the generated electrical signal into a DC voltage, and a switch unit switching to allow a current to flow between the battery and a converter, when the converted DC voltage is received.

First claim

What is claimed is:

1. A reverse battery protection device comprising:
a signal generating unit measuring a voltage of a battery and generating a constant electrical signal regardless of the actual measured voltage when the measured voltage is greater than or equal to a reference voltage;
a signal converting unit converting the generated electrical signal into a DC voltage; and
a switch unit allowing current to flow between the battery and a converter when the converted DC voltage is received.

2. The reverse battery protection device according to claim 1 , wherein the generated electrical signal causes the switch unit to allow current to flow between the battery and the converter.

3. The reverse battery protection device according to claim 1 , wherein the converted DC voltage has a constant magnitude.

4. The reverse battery protection device according to claim 1 , wherein the reference voltage is a voltage within a measurable range when the battery is normally connected to the reverse battery protection device.

5. The reverse battery protection device according to claim 1 , wherein:
the switch unit comprises a field effect transistor (FET); and
the signal converting unit delivers the converted DC voltage to a gate terminal of the FET.

6. The reverse battery protection device according to claim 1 , wherein the signal converting unit comprises a center-tapped full wave rectifying circuit.

7. The reverse battery protection device according to claim 1 , wherein the converter comprises a low voltage DC/DC converter.

8. The reverse battery protection device according to claim 1 , wherein the generated electrical signal is a pulse width modulation signal.

9. An operating method of a reverse battery protection device, the method comprising:
measuring a voltage of a battery;
comparing the measured voltage with a reference voltage;
generating a constant signal based the comparison; and
performing a connecting operation between the battery and a converter charging the battery based on the generated electrical signal regardless of the actual measured voltage when the measured voltage is greater than or equal to a reference voltage.

10. The operating method according to claim 9 , wherein the connection operation is performed when the measured voltage is greater than or equal to the reference voltage.

11. The operating method according to claim 10 , wherein the connecting operation comprises:
converting the generated electrical signal into a DC voltage; and
performing a switching operation that connects the battery and the converter based on the converted DC voltage.

12. The operating method according to claim 9 , further comprising generating a disconnection electrical signal for disconnecting the battery from the converter when the measured voltage is smaller than the reference voltage.

13. The operating method according to claim 12 , wherein the switching operation is performed based on the disconnection electrical signal.

14. The reverse battery protection device according to claim 1 , wherein the signal generating unit generates a disconnection electrical signal for disconnecting the battery from the converter when the measured voltage is smaller than the reference voltage.

15. The reverse battery protection device according to claim 14 , wherein the switch disconnects the battery from the converter based on the disconnection electrical signal.

16. operating method according to claim 9 , wherein the connecting operation allows current to flow between the battery and the converter.

17. operating method according to claim 11 , wherein the converted DC voltage has a constant magnitude.

18. operating method according to claim 9 , wherein the reference voltage is a voltage within a measurable range when the battery is normally connected to the reverse battery protection device.

19. operating method according to claim 9 , wherein the generated electrical signal is a pulse width modulation signal.

Assignees

• Lsis Co Ltd

Inventors

• Park Sung Sik
• Kim Woo Sup

Classifications

• H02J7/68 Primary

  using circuits for correcting or protecting against reverse-polarity · CPC title

• H02H3/18 Primary

  responsive to reversal of direct current · CPC title

• H02H11/003 Primary

  using a field effect transistor as protecting element in one of the supply lines · CPC title

• H02J7/0034

  Electricity · mapped topic