Apparatus for detecting a static current in a secondary battery of a vehicle and protecting the secondary battery

A battery-protecting apparatus electrically connected to a secondary battery (2), a generator (3) and a load unit (4) of a vehicle so that the generator (3) provides electricity to the battery (2) via the battery-protecting apparatus and that the battery (2) provides electricity to the load unit (4) via the battery-protecting apparatus, wherein the battery-protecting apparatus comprises:

• a detection unit (10) comprising:
• a static detection loop (11) for measuring the intensity of a current from the battery (2) to determine whether electricity is leaked from the battery (2) when the vehicle is stopped;
• and
• a dynamic detection loop (12) comprising a voltage-detecting circuit for measuring the voltage of a current from the generator (3), a current-detecting circuit for measuring the voltage and intensity of a current from the battery (2), and a temperature-detecting circuit for measuring the temperature in the environment when the vehicle is stopped;
• a switch (20) electrically connected to the detection unit (10) and operable to turn on and off the static detection loop (11) and the dynamic detection loop (12) to choose one from the static detection loop (11) and the dynamic detection loop (12) for operation;
• a controlling unit (40) comprising:
• a first circuit (41) for transferring electricity to the battery (2) from the generator (3), wherein first circuit (41) comprises a switch operable to turn on and off the first circuit (41);
• a second circuit (42) for transferring electricity to the load unit (4) from the battery (2), wherein the second circuit (42) comprises a switch operable to turn on and off the second circuit (42);
• a third circuit (43) comprising a switch operable to turn on and off the third circuit (43);
• and
• a fourth circuit (44) electrically connected to the third circuit (43) in parallel, wherein the fourth circuit (44) comprises a switch operable to turn on and off the fourth circuit (44);
• a discharging loop (50) electrically connected to the battery (2) via the third and fourth circuits (43, 44), and adapted for consuming the electricity in the battery (2);
• a wireless communication unit (60);
• a security loop (70) for avoiding a strong current from the battery (2) when the vehicle is in an anti-theft mode;
• and
• a processor (30) electrically connected to the detection unit (10), the controlling unit (40), the discharging loop (50), the wireless communication unit (60) and the security loop (70), wherein the processor (30) is adapted for sending a signal to the controlling unit (40) to cause the controlling unit (40) to protect the battery (2) based on the measured current intensities, voltage and temperature, wherein the processor (30) is adapted for sending the measured current intensities, voltage and temperature to a portable communication device via the wireless communication unit (60) to allow the portable communication device to be operated to control the battery-protecting apparatus.