Lithium polymer battery powered intravenous fluid warmer
First Claim
1. For use with a system for warming an intravenous fluid to be administered to a living body, which includes a case through which an intravenous fluid line extends, an apparatus comprising:
- a housing configured for attachment to the case, the housing including;
a plurality of lithium polymer cells;
a charger connected to the plurality of lithium polymer cells;
a heater positioned to transfer heat to the case and attached to a thermal fuse;
a fluid warmer microcontroller connected to the charger and the heater;
a spread spectrum oscillator connected to the fluid warmer microcontroller;
a battery condition indicator and controller connected to a fluid warmer cover closure signal and to the fluid warmer microcontroller;
a first order battery protection circuit connected to elements selected from the group consisting of;
the battery condition indicator and controller,at least one sensor connected to at least one of the plurality of lithium polymer cells,a cell balance circuit connected to the at least one of the plurality of lithium polymer cells, anda battery disconnect switch;
a second order battery protection circuit connected to the at least one of the plurality of lithium polymer cells and the thermal fuse; and
a fluid warmer overtemperature protection to sense the temperature of the case during use and connected to the thermal fuse.
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Accused Products
Abstract
A lithium polymer (LiPo) battery pack having LiPo battery cells is provided which includes battery protection circuitry, charging circuitry, cell balancing circuitry, and control and communication circuitry. The batteries can be charged while in use by an internal charger. Battery charging and discharging are accomplished in a controlled and protected manner to avoid overcharging and overdischarging conditions. The novel battery pack has built-in safeguards against dangerous LiPo battery conditions and is implemented in a small, portable unit which contains the battery cells, control and protection circuitry, internal charger and display gauge. The battery pack is useful for powering an intravenous fluid warmer or other medical or electrical devices and equipment.
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Citations
21 Claims
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1. For use with a system for warming an intravenous fluid to be administered to a living body, which includes a case through which an intravenous fluid line extends, an apparatus comprising:
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a housing configured for attachment to the case, the housing including; a plurality of lithium polymer cells; a charger connected to the plurality of lithium polymer cells; a heater positioned to transfer heat to the case and attached to a thermal fuse; a fluid warmer microcontroller connected to the charger and the heater; a spread spectrum oscillator connected to the fluid warmer microcontroller; a battery condition indicator and controller connected to a fluid warmer cover closure signal and to the fluid warmer microcontroller; a first order battery protection circuit connected to elements selected from the group consisting of; the battery condition indicator and controller, at least one sensor connected to at least one of the plurality of lithium polymer cells, a cell balance circuit connected to the at least one of the plurality of lithium polymer cells, and a battery disconnect switch; a second order battery protection circuit connected to the at least one of the plurality of lithium polymer cells and the thermal fuse; and a fluid warmer overtemperature protection to sense the temperature of the case during use and connected to the thermal fuse. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification