Rechargeable implantable battery pack with battery management circuit
First Claim
1. A secondary battery pack for powering a device, comprising:
- a secondary battery having a secondary battery voltage; and
a battery management system electrically coupled to said secondary battery;
said battery management system comprising;
an input for receiving a battery management system input voltage from a charging source; and
a component that prevents reverse current flow from said secondary battery to said charging source, said component having a forward voltage;
wherein said secondary battery voltage increases when said battery management system input voltage is greater than said secondary battery voltage by said forward voltage.
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Accused Products
Abstract
An implantable secondary battery pack having a battery management system and secondary battery is disclosed. The battery management system is capable of charging the rechargeable battery using low incoming voltage. When the rechargeable battery is charging, the battery management circuit output voltage is almost the same as that of the rechargeable battery. The battery management circuit has battery monitor functions and prevents the rechargeable battery from over-charging or over-discharging by using only one large switch. This invention can be used to remotely recharge implantable medical devices such as a pacemaker, neurostimulator, defibrillator, and cochlear implant.
34 Citations
14 Claims
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1. A secondary battery pack for powering a device, comprising:
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a secondary battery having a secondary battery voltage; and
a battery management system electrically coupled to said secondary battery;
said battery management system comprising;
an input for receiving a battery management system input voltage from a charging source; and
a component that prevents reverse current flow from said secondary battery to said charging source, said component having a forward voltage;
whereinsaid secondary battery voltage increases when said battery management system input voltage is greater than said secondary battery voltage by said forward voltage. - View Dependent Claims (2, 3, 4, 5, 6)
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7. The battery pack for powering a device, comprising:
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a secondary battery having a secondary battery voltage; and
a battery management system electrically coupled to said secondary battery;
whereinthe output voltage to the device is almost the same as said secondary battery voltage and can be used to identify the charge status of said secondary battery.
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8. A secondary battery pack for powering a device, comprising:
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a secondary battery having a secondary battery voltage; and
a battery management system electrically coupled to said secondary battery;
said battery management system comprising;
an input for receiving a battery management system input voltage from a charging source;
a component for preventing reverse current to said charging source, said component having a voltage drop;
a variable output voltage series regulator circuit having a regulator output voltage;
a voltage comparator for comparing said battery management system input voltage minus said voltage drop to said regulator output voltage and outputting the higher of said battery management system input voltage minus said voltage drop and said regulator output voltage;
whereinsaid secondary battery voltage increases when said battery management system input voltage minus said voltage drop is greater than said secondary battery voltage. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification