Battery life indication techniques for an electronic device
A portable electronic device, such as a fluid infusion device, obtains its operating power from a primary battery and a secondary battery. The primary battery may be a replaceable battery, and the secondary battery may be a rechargeable battery that can be charged with the primary battery under certain conditions. The device utilizes a power management scheme that transitions between the primary battery and/or the secondary battery to prolong the useful life of the primary battery. The device may also generate an intelligent battery life indicator that displays an accurate representation of the remaining life of the primary battery.
1. A method of controlling a battery life indicator for an electronic device having a primary battery and a secondary battery, the method comprising:
determining whether the electronic device is operating in a first power phase, a second power phase, or a third power phase, wherein during the first power phase only the primary battery supports functions of the electronic device, during the second power phase both the primary battery and the secondary battery support functions of the electronic device, and during the third power phase only the secondary battery supports functions of the electronic device; and
generating the battery life indicator with characteristics that represent remaining battery life of the primary battery, wherein the characteristics are dictated by a battery voltage of the primary battery and the determined power phase of the electronic device.
2. The method of claim 1 , further comprising:
obtaining a runtime measurement for the primary battery, wherein the characteristics of the battery life indicator are dictated by the battery voltage, the obtained runtime measurement, and the determined power phase of the electronic device.
3. The method of claim 2 , wherein:
the battery life indicator has four segments that represent remaining battery life of the primary battery; and
generating the battery life indicator comprises generating only one of the segments when the electronic device is operating in the third power phase.
4. The method of claim 2 , wherein:
the battery life indicator has four segments that represent remaining battery life of the primary battery; and
generating the battery life indicator comprises generating all four of the segments when the electronic device is operating in the first power phase, the battery voltage is greater than an upper threshold voltage value (V B >V T — U ), and the obtained runtime measurement is less than or equal to a lower threshold time value (t≦t T — L ).
5. The method of claim 2 , wherein:
the battery life indicator has four segments that represent remaining battery life of the primary battery; and
generating the battery life indicator comprises generating only three of the segments when the electronic device is not operating in the third power phase, the battery voltage is greater than a lower threshold voltage value and less than or equal to an upper threshold voltage value (V T — L <V B ≦V T — U ), and the obtained runtime measurement is less than or equal to an upper threshold time value (t≦t T — U ).
6. The method of claim 2 , wherein:
the battery life indicator has four segments that represent remaining battery life of the primary battery; and
generating the battery life indicator comprises generating only three of the segments when the electronic device is not operating in the third power phase, the battery voltage is greater than an upper threshold voltage value (V B >V T — U ), and the obtained runtime measurement is greater than a lower threshold time value and less than or equal to an upper threshold time value (t T — L <t≦t T — U ).
7. The method of claim 2 , wherein:
the battery life indicator has four segments that represent remaining battery life of the primary battery; and
generating the battery life indicator comprises generating only three of the segments when the electronic device is operating in the second power phase, the battery voltage is greater than an upper threshold voltage value (V B >V T — U ), and the obtained runtime measurement is less than or equal to a lower threshold time value (t≦t T — L ).
8. The method of claim 2 , wherein:
the battery life indicator has four segments that represent remaining battery life of the primary battery; and
generating the battery life indicator comprises generating only two of the segments when the electronic device is not operating in the third power phase, and the battery voltage is less than or equal to a lower threshold voltage value (V B ≦V T — L ).
9. The method of claim 2 , wherein:
the battery life indicator has four segments that represent remaining battery life of the primary battery; and
generating the battery life indicator comprises generating only two of the segments when the electronic device is not operating in the third power phase, the battery voltage is greater than a lower threshold voltage value and less than or equal to an upper threshold voltage value (V T — L <V B ≦V T — U ), and the obtained runtime measurement is greater than an upper threshold time value (t>t T — U ).
10. The method of claim 2 , wherein:
the battery life indicator has four segments that represent remaining battery life of the primary battery; and
generating the battery life indicator comprises generating only two of the segments when the electronic device is not operating in the third power phase, the battery voltage is greater than an upper threshold voltage value (V B >V T — U ), and the obtained runtime measurement is greater than an upper threshold time value (t>t T — U ).
11. A battery monitor system for an electronic device having a primary battery and a secondary battery, the battery monitor system comprising:
a control module to operate the electronic device in a designated power phase corresponding to either:
a first power phase during which only the primary battery provides energy for operation of the electronic device;
a second power phase during which both the primary battery and the secondary battery provide energy for operation of the electronic device; or
a third power phase during which only the secondary battery provides energy for operation of the electronic device; and
a battery life indicator controller coupled to the control module to generate a battery life indicator for the electronic device that indicates an amount of remaining battery life of the primary battery, wherein the amount of remaining battery life is determined based on the designated power phase.
12. The battery monitor system of claim 11 , wherein the battery voltage monitored by the voltage monitor is an unloaded battery voltage.
13. The battery monitor system of claim 11 , wherein:
when the electronic device is operating in the first power phase, the primary battery supports basic functions and high power functions of the electronic device;
when the electronic device is operating in the second power phase, the primary battery supports the basic functions, and the secondary battery supports the high power functions; and
when the electronic device is operating in the third power phase, the secondary battery supports the basic functions and the high power functions.
14. The battery monitor system of claim 11 , wherein the amount of remaining battery life indicated by the battery life indicator is governed by a battery voltage of the primary battery, the designated power phase, and a runtime measurement of the primary battery.
15. The battery monitor system of claim 11 , wherein the amount of remaining battery life indicated by the battery life indicator is governed by the designated power phase, and by a battery voltage of the primary battery.
16. The battery monitor system of claim 11 , wherein the amount of remaining battery life indicated by the battery life indicator is governed by the designated power phase, and by a runtime measurement of the primary battery.
17. The battery monitor system of claim 11 , wherein:
the battery life indicator has four segments that represent the amount of remaining battery life of the primary battery; and
the battery life indicator includes only one of the segments when the designated power phase is the third power phase.