LITHIUM POLYMER BATTERY POWERED INTRAVENOUS FLUID WARMER
First Claim
1. Apparatus for indicating a condition of a cell of a battery, the apparatus comprising:
- a plurality of cells;
a charger connected to the plurality of cells such that the charger directs a discharge load current on a path separate from a path of charging current;
a battery condition indicator and controller connected to a first order battery protection circuit;
the first order battery protection circuit connected to at least one sensor;
the at least one sensor connected to at least one of the plurality of cells and operative to sense a predetermined condition of the at least one of the plurality of cells; and
the first order battery protection circuit configured to disconnect the at least one of the plurality of cells under the predetermined condition sensed by the at least one sensor.
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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.
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Citations
23 Claims
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1. Apparatus for indicating a condition of a cell of a battery, the apparatus comprising:
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a plurality of cells; a charger connected to the plurality of cells such that the charger directs a discharge load current on a path separate from a path of charging current; a battery condition indicator and controller connected to a first order battery protection circuit; the first order battery protection circuit connected to at least one sensor; the at least one sensor connected to at least one of the plurality of cells and operative to sense a predetermined condition of the at least one of the plurality of cells; and the first order battery protection circuit configured to disconnect the at least one of the plurality of cells under the predetermined condition sensed by the at least one sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A battery pack comprising:
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a plurality of lithium polymer cells; a charger connected to the plurality of lithium polymer cells; a spread spectrum oscillator connected to the charger; a battery condition indicator and controller connected to the charger; 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; and a second order battery protection circuit connected to the at least one of the plurality of lithium polymer cells and a thermal fuse. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification