Patent ID: 9276421
Filing Date: 2016-03-01
CPC Classification: H01M,H02J,Y02E

Claim Text:
1. A portable rechargeable battery pack, comprising: at least one rechargeable cell disposed in the battery pack; a set of host contacts disposed on the battery pack that provide power from the at least one rechargeable cell to a host device coupled to the battery pack; a set of charging contacts including a power contact disposed on the battery pack that provides a charging current to the at least one rechargeable cell; a charge protection circuit element coupled between the at least one rechargeable cell and the power contact and that allows charging and prevents discharging of the at least one rechargeable cell through the set of charging contacts; a discharge circuit having at least one circuit element coupled in parallel with the charge protection circuit element that allows a discharge current through the power contact; and wherein the charge protection circuit element is a diode-connected bipolar junction transistor coupled to allow charge current into the at least one rechargeable cell from the power contact and to block a discharge current from the at least one rechargeable cell to the power contact.