Patent ID: 7202576
Filing Date: 2007-04-10
Classification: H02J

Abstract:
1. An uninterruptible power supply comprising: a precharge circuit including: a battery pack sensor electrically coupled to the precharge circuit, the sensor operative to sense the presence of an extra battery pack; and a battery cartridge having a battery with positive and negative terminals, a first cartridge contact coupled to the positive terminal of the battery and adapted for mating with the first precharge contact, a second cartridge contact coupled to the negative terminal of the battery and adapted for mating with the second precharge contact, and a third cartridge contact electrically coupled to the first cartridge contact, the third cartridge contact adapted for mating with the third precharge contact, at least one of the first cartridge contact and the first precharge contact being recessed relative to the third cartridge contact and the third precharge contact, respectively, such that the capacitor is precharged through the third cartridge contact prior to full electrical contact between the first cartridge contact and the first precharge contact.