Rapid charging and power management of a battery-powered fluid analyte meter

• US 10,320,212 B2
• Filed: 07/27/2018
• Issued: 06/11/2019
• Est. Priority Date: 12/10/2007
• Status: Active Grant

• Current Assignee: Ascensia Diabetes Care Holdings AG (PHC Holdings Corporation)
• Original Assignee: Ascensia Diabetes Care Holdings AG (PHC Holdings Corporation)
• Inventors: Gofman, Igor, Chen, Jun
• Primary Examiner(s): La, Anh V
• Application Number:
  US16/047,769
• Publication Number:
  US 20180358828A1
• Time in Patent Office: 319 Days
• Field of Search: 3406362, 3406361, 340603, 3405731, 600365
• CPC Class Codes: A61B 2560/0214 of power generation or supply
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: G01N 33/48785 Electrical and electronic details of measuring devices for physical analysis of liquid biological material not specific to a particular test method, e.g. user interface or power supply
• CPC Class Codes: G01R 31/3646 for indicating electrical conditions or variables, e.g. visual or audible indicators
• CPC Class Codes: G01R 31/3842 combining voltage and current measurements
• CPC Class Codes: H02J 2310/23 The load being a medical device, a medical implant, or a life supporting device
• CPC Class Codes: H02J 7/0071 with a programmable schedule
• CPC Class Codes: H02J 7/00714 in response to battery charging or discharging current
• CPC Class Codes: H02J 7/007192 in response to temperature
• CPC Class Codes: H02J 7/007194 of the battery

Abstract

A system and method is described for rapid charging and power management of a battery for a meter. A charger component is operably associated with the meter and is capable of executing a rapid charge algorithm for a rechargeable battery. The algorithm includes monitoring for a connection to an external power source and implementing a charging routine of a battery at a first charge rate and then at a second charge rate. The second charge rate is lower than the first charge rate. A temperature rise in the rechargeable battery due to the first charge rate has a negligible heat transfer effect on the fluid sample. The meter can also include a power switch for controlling current flow to a battery fuel gauge. The power switch is open when the meter enters into a sleep mode. The state of battery charge is determined after the meter exits the sleep mode.

Claims

1. A blood-glucose meter including a circuit configured with a rechargeable battery to provide power to a sensing element for determining a blood-glucose concentration of a fluid sample, the blood-glucose meter comprising:

a housing defining a port sized to receive at least a portion of a test sensor, the rechargeable battery and the circuit being at least partially disposed within the housing;

a processor powered by the circuit and disposed within the housing, the processor configured to operate the meter in an active mode and a sleep mode;

a fuel gauge powered by the circuit, the fuel gauge disposed within the housing and configured to track state of battery charge data received from the battery during the active mode of operation of the meter;

an interface configured to transfer state of battery charge data from the fuel gauge to the processor; and

a switch for controlling current flow to the fuel gauge, the switch configured to be open and closed by the processor, the processor signaling the switch to an open position to disconnect the fuel gauge from the circuit if the meter enters into the sleep mode and the processor signaling the switch to a closed position if the meter enters into the active mode.

2. The blood-glucose meter of claim 1, wherein the processor is configured to determine a state of battery charge after the blood glucose meter enters into the active mode.

3. The blood-glucose meter of claim 1, wherein the fuel gauge continuously tracks state of battery charge during the active mode of operation of the blood-glucose meter.

4. The blood-glucose meter of claim 1, wherein the processor is configured to determine updated states of battery charge during the active mode of operation using battery charge data received from the battery fuel gauge.

5. The blood-glucose meter of claim 4, wherein the determining of updated states of battery charge is continuous.

6. The blood-glucose meter of claim 1, wherein the fuel gauge is an integrated circuit.

7. The blood-glucose meter of claim 1, further comprising a display coupled to the processor, the display configured to display a present state of battery charge.

8. The blood-glucose meter of claim 1, wherein the processor is a microcontroller.

9. The blood-glucose meter of claim 1, wherein the blood-glucose meter enters into the active mode when a primary power source is charging the battery.

10. A non-transitory computer-readable medium disposed within a housing of a blood-glucose meter configured to operate in an active mode and a standby mode, the housing including a port configured to receive a test sensor, the blood-glucose meter including a battery fuel gauge powered by a power distribution circuit, the computer-readable memory medium having stored thereon an instruction set for managing the power of the blood-glucose meter, the instruction set being configured to implement, upon execution by a processor disposed within the housing, acts comprising:

receiving a first input to enter a standby mode;

entering the blood-glucose meter into the standby mode, wherein power to the battery fuel gauge is switched off in the standby mode thereby disconnecting the battery fuel gauge from the power distribution circuit;

receiving a subsequent input to exit the standby mode and enter the active mode, wherein power to the battery fuel gauge is switched on in the active mode; and

determining a state of battery charge after the meter enters into the active mode.

11. The non-transitory computer-readable medium of claim 10, wherein said instruction set is further configured to implement, upon execution by the processor, the act comprising updating a state of battery charge using battery charge data received by the processor from the battery fuel gauge if the meter is in the active mode.

12. The non-transitory computer-readable medium of claim 11, wherein the updating is continuous.

13. The non-transitory computer-readable medium of claim 10, wherein the fuel gauge is an integrated circuit.

14. The non-transitory computer-readable medium of claim 10, wherein said instruction set is further configured to implement, upon execution by the processor, the act comprising displaying a present state of battery charge on a display.

15. The non-transitory computer-readable medium of claim 10, wherein the processor is a microcontroller.

16. The non-transitory computer-readable medium of claim 10, wherein the blood-glucose meter enters into the active mode when a primary power source is charging the battery.