Hybrid battery network for implantable medical device
First Claim
1. An implantable cardiac stimulation device comprising:
- a first battery having an anode and a cathode;
a second battery having an anode and a cathode and electrically connected in parallel to the first battery;
the first battery having a higher resistance and a greater energy density than the sceond battery;
a charging circuit connected to the batteries;
the anodes of the first and second batteries being directly connected to each other; and
the cathodes of the first and second batteries being directly connected to each other.
1 Assignment
0 Petitions
Accused Products
Abstract
An implantable cardiac stimulation device with a hybrid battery network having first and second batteries with different battery chemistries connected in parallel with each other. The first dense cell battery has a higher resistance and greater energy density than the second fast cell battery, and the fast cell battery has greater current carrying capability than the dense cell battery. The dense cell battery has a higher voltage than the fast cell battery. In one embodiment the dense cell is a Lithium Carbon Monofluoride cell and the fast cell is a Lithium Silver Vanadium Oxide cell. During high current demand of high voltage capacitor charging, the fast cell provides the vast majority of the current due to its lower resistance. Following capacitor charging, the fast cell is recharged from the dense cell at a rate limited by the voltage difference between the cells.
54 Citations
20 Claims
-
1. An implantable cardiac stimulation device comprising:
-
a first battery having an anode and a cathode;
a second battery having an anode and a cathode and electrically connected in parallel to the first battery;
the first battery having a higher resistance and a greater energy density than the sceond battery;
a charging circuit connected to the batteries;
the anodes of the first and second batteries being directly connected to each other; and
the cathodes of the first and second batteries being directly connected to each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A long-life high speed battery network comprising:
-
a first battery having an anode and a cathode;
a second battery having an anode and a cathode and electrically connected in parallel to the first battery;
the anodes of the batteries being directly connected to each other, and the cathodes of the batteries being directly connected to each other;
the first battery having a higher resistance and higher open cell voltage than the second battery; and
the second battery having a greater current carrying capability than the first battery. - View Dependent Claims (11, 12, 13, 14)
-
-
15. An implantable defibrillator comprising:
-
a battery set comprising first and second batteries each having an anode and a cathode, the first and second batteries connected in series with the anode of one of the first and second batteries connected directly to the cathode of the other of the first and second batteries;
a third battery electrically connected in parallel to the battery set;
the battery set having a higher open circuit voltage and higher resistance and a greater energy density than the third battery; and
a charging circuit connected to the batteries. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification