Battery pack with short circuit protection
First Claim
Patent Images
1. A battery pack with short circuit protection comprising:
- (a) a battery having electrodes;
(b) at least one semiconductor switching device, having an input control terminal, said semiconductor device being connected in series with the battery;
(c) electrode terminals, connected through the at least one semiconductor switching device to the battery electrodes; and
(d) a control circuit, connected to the input control terminal of the at least one semiconductor switching device, for detecting an attachment of the battery pack to electrical equipment and for turning said at least one semiconductor switching device on and off;
wherein the control circuit turns said at least one semiconductor switching device on when it has detected that the battery pack is attached to the electrical equipment, thereby connecting the battery to the electrical equipment electrically and wherein the control circuit turns said at least one semiconductor switching device off when it has detected that the battery pack is unattached to the electrical equipment, thereby isolating the electrode terminals from the battery to avoid accidental short circuits.
1 Assignment
0 Petitions
Accused Products
Abstract
Connection between internal batteries and external terminals of the battery pack is controlled by semiconductor switching devices, rather than by switches with mechanical contacts. When the battery pack Is not connected, battery short circuits are prevented by non-conduction of the switching devices. When the battery pack is attached to electrical equipment, a control circuit turns the switching devices on to supply power to the equipment. If the electrical equipment is a battery charger, the switching devices are turned on to supply power to the battery pack.
-
Citations
17 Claims
-
1. A battery pack with short circuit protection comprising:
-
(a) a battery having electrodes; (b) at least one semiconductor switching device, having an input control terminal, said semiconductor device being connected in series with the battery; (c) electrode terminals, connected through the at least one semiconductor switching device to the battery electrodes; and (d) a control circuit, connected to the input control terminal of the at least one semiconductor switching device, for detecting an attachment of the battery pack to electrical equipment and for turning said at least one semiconductor switching device on and off; wherein the control circuit turns said at least one semiconductor switching device on when it has detected that the battery pack is attached to the electrical equipment, thereby connecting the battery to the electrical equipment electrically and wherein the control circuit turns said at least one semiconductor switching device off when it has detected that the battery pack is unattached to the electrical equipment, thereby isolating the electrode terminals from the battery to avoid accidental short circuits. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
Specification