Lithium polymer battery powered intravenous fluid warmer
First Claim
1. An apparatus for use with a system for warming a fluid to be administered to a living body, which includes the system including a case through which a fluid line extends, the apparatus comprising:
- a housing configured for attachment to the case, the housing including;
one or more lithium polymer cells;
a heater positioned to transfer heat to the case;
a fluid warmer microcontroller connected to the heater;
a first order battery protection circuit connected to elements selected from4hea group consisting of;
a battery condition indicator and controller,at least one sensor connected to at least one of the one or more lithium polymer cells,a cell balance circuit connected to the one or more lithium polymer cells, anda battery disconnect switch;
a second order battery protection circuit connected to the one or more lithium polymer cells;
a fluid warmer over-temperature protection circuit to sense a temperature of the case during use; and
a thermal fuse coupled to the heater, the second order battery protection circuit, and the fluid warmer over-temperature protection circuit, wherein the second order battery protection circuit opens the thermal fuse in response to a predetermined condition, and wherein the fluid warmer over-temperature protection circuit opens the thermal fuse in response to sensing an excessive fluid temperature.
10 Assignments
0 Petitions
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.
39 Citations
18 Claims
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1. An apparatus for use with a system for warming a fluid to be administered to a living body, which includes the system including a case through which a fluid line extends, the apparatus comprising:
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a housing configured for attachment to the case, the housing including; one or more lithium polymer cells; a heater positioned to transfer heat to the case; a fluid warmer microcontroller connected to the heater; a first order battery protection circuit connected to elements selected from4hea group consisting of; a battery condition indicator and controller, at least one sensor connected to at least one of the one or more lithium polymer cells, a cell balance circuit connected to the one or more lithium polymer cells, and a battery disconnect switch; a second order battery protection circuit connected to the one or more lithium polymer cells; a fluid warmer over-temperature protection circuit to sense a temperature of the case during use; and a thermal fuse coupled to the heater, the second order battery protection circuit, and the fluid warmer over-temperature protection circuit, wherein the second order battery protection circuit opens the thermal fuse in response to a predetermined condition, and wherein the fluid warmer over-temperature protection circuit opens the thermal fuse in response to sensing an excessive fluid temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A battery back enclosure for a fluid warmer, the battery pack enclosure comprising:
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one or more lithium polymer cells; a first order battery protection circuit, coupled to at least one sensor and a battery disconnect switch, for disconnecting the one or more lithium polymer cells from a power source in response to a first predetermined condition; a second order battery protection circuit, coupled to the at least one sensor, for disconnecting the one or more lithium polymer cells from the power source in response to a second predetermined condition; a fluid warmer over-temperature protection circuit for disconnecting the one or more lithium polymer cells from the power source in response to sensing an excessive fluid temperature; and a thermal fuse coupled to the second order battery protection circuit and the fluid warmer over-temperature protection circuit, wherein the second order battery protection circuit opens the thermal fuse in response to the second predetermined condition, and wherein the fluid warmer over-temperature protection circuit opens the thermal fuse in response to sensing the excessive fluid temperature. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification