Patent ID: 8026696
Filing Date: 2011-09-27
Classification: H01M,H02J,Y02E

Abstract:
1. A rechargeable battery pack, comprising: a power cell; a higher and a lower power supply rail; a first electronic switching device for charge control, operatively coupled to the power cell, wherein current passing through the power cell also passes through the first electronic switching device when the first electronic switching device is in a conducting condition; a second electronic switching device for discharge control, operatively coupled to the power cell, wherein current passing through the power cell also passes through the second electronic switching device when the second electronic switching device is in a conducting condition; a first protection circuit operatively coupled to the first and second electronic switching devices and configured to cause the first and second electronic switching devices to assume a non-conducting condition when one or both of an overvoltage and overcurrent condition exists; and a second protection circuit operatively coupled to the first and second electronic switching devices and configured to receive a negligible current from said power cell and to cause the first and second electronic switching devices to assume a non-conducting condition when a temperature in the rechargeable battery pack exceeds a threshold value, the second protection circuit having: