STATE OF CHARGE INDICATION IN A HEARING DEVICE

摘要

A hearing device such as a hearing aid includes a function module, a rechargeable battery, and a battery power management unit. The battery power management unit includes a voltage regulator in operative connection with the rechargeable battery, the voltage regulator being adapted to output a supply voltage to the function module. The battery power management unit also includes a control unit in operative connection with the voltage regulator and with the rechargeable battery, adapted to measure the rechargeable battery output voltage and to control the supply voltage output by the voltage regulator. The control unit is adapted to encode a signal in dependence of the rechargeable battery output voltage onto the supply voltage. In consequence, the function module can extract information on the state of charge of the rechargeable battery so as to be able to inform the hearing device wearer accordingly.

主权项

1. Hearing device (10) comprising a function module (11), a rechargeable battery (15), and a battery power management unit (14), the battery power management unit (14) comprising:
a voltage regulator (16) in operative connection with the rechargeable battery (15), the voltage regulator (16) being adapted to output a supply voltage (V_HI) to the function module (11); a control unit (17) in operative connection with the voltage regulator (16) and with the rechargeable battery (15), the control unit (17) being adapted to measure the rechargeable battery output voltage (V_BATT) and to control the supply voltage (V_HI) output by the voltage regulator (16); wherein the control unit (17) is adapted to encode a signal in dependence of the rechargeable battery output voltage (V_BATT) onto the supply voltage (V_HI).