BATTERY POLARITY DETECTION SYSTEM

• US 20120139498A1
• Filed: 08/26/2009
• Published: 06/07/2012
• Est. Priority Date: 08/26/2009
• Status: Abandoned Application

• Current Assignee: Chang, I-Chang
• Original Assignee: Chang, I-Chang
• Inventors: Chang, I-Chang
• Application Number:
  US13/389,441
• Publication Number:
  US 20120139498A1
• Time in Patent Office: Days
• US Class Current: 320/134
• CPC Class Codes: G01R 19/14 Indicating direction of current; Indicating polarity of voltage
• CPC Class Codes: G01R 31/396 Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery

Abstract

The battery polarity detection system contains multiple detection terminals, a control unit, and a charging/discharging circuit. Each detection terminal is connected to a terminal of a battery. The control unit has an internal default voltage and is capable of measuring voltage differences between the detection terminals and comparing the voltage differences with the internal default voltage. If a voltage difference between a first detection terminal and a second detection terminal is greater than the internal default voltage, the control unit makes said first detection terminal of a greater voltage connected to a positive terminal of the charging/discharging circuit; and the control unit makes the second detection terminal of zero voltage connected to a negative terminal of the charging/discharging circuit, thereby forming a complete loop. The battery polarity detection system can correctly identify the polarity of a battery, avoiding burning down the battery'"'"'s control or password IC.

Claims

1. A battery polarity detection system, comprising:

a plurality of detection terminals, each connected to a terminal of a battery;

a control unit having an internal default voltage, said control unit capable of measuring voltage differences between said detection terminals and comparing said voltage differences with said internal default voltage; and

a charging/discharging circuit;

wherein, if a voltage difference between a first detection terminal and a second detection terminal is greater than said internal default voltage, said control unit makes said first detection terminal of a greater voltage connected to a positive terminal of said charging/discharging circuit; and

said control unit makes said second detection terminal of zero voltage connected to a negative terminal of said charging/discharging circuit, thereby forming a complete loop.

2. The battery polarity detection system according to claim 1, further comprising:

a plurality of positive voltage conduction units, each connected to one of said detection terminals and said control unit;

a plurality of negative voltage conduction units, each connected to one of said detection terminals and said control unit; and

a power conduction unit connected to said charging/discharging circuit;

wherein, for said detection terminals having a voltage greater than said internal default voltage, said positive voltage detection unit of a detection terminal having the highest voltage and said power conduction unit are conduced so that said detection terminal is conducted to said positive terminal of said charging/discharging circuit; and

, for a detection terminals having zero voltage, said negative voltage conduction unit of said detection terminal is conducted so that said detection terminal is conducted to said negative terminal of said charging/discharging circuit and a complete loop is formed.

3. The battery polarity detection system according to claim 2, wherein said power conduction unit is connected to said control unit, and all of said positive and negative voltage conduction units.

4. The battery polarity detection system according to claim 3, wherein, when a voltage difference is greater than said internal default voltage, said control unit makes said power conduction unit conducted.

5. The battery polarity detection system according to claim 1, further comprising a manual switch connected to said control unit;

wherein, when a battery under test is over-discharged and after said manual switch is turned on, said control unit turns on said power conduction unit and cross-connects said positive voltage conduction units and said negative voltage conduction units so that positive and negative voltages are alternately switched between said detection terminals and said over-discharged battery as such is charged again.

6. The battery polarity detection system according to claim 1, wherein said control module is capable of comparing a positive terminal of a battery loop connected to a detection terminal with said internal default voltage;

if a voltage measured at said positive terminal of said battery loop is greater than said internal default voltage, said detection terminal is conducted to a positive terminal of said charging/discharging circuit; and

if a zero voltage is measured, said detection terminal is conducted to a negative terminal of said charging/discharging circuit so as to form a loop.