Lithium-ion batteries for hearing aid applications: II. Pulse discharge and safety tests

Rechargeable lithium-ion batteries were designed to meet the power requirements of hearing aid devices (HADs). The batteries were designed in a 312-button cell size, compatible with existing hearing aids. The batteries were tested to evaluate the design and the electrochemical performance, as they r...

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Veröffentlicht in:Journal of power sources 2000-10, Vol.90 (2), p.144-152
Hauptverfasser: Passerini, S, Coustier, F, Owens, B.B
Format: Artikel
Sprache:eng
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Zusammenfassung:Rechargeable lithium-ion batteries were designed to meet the power requirements of hearing aid devices (HADs). The batteries were designed in a 312-button cell size, compatible with existing hearing aids. The batteries were tested to evaluate the design and the electrochemical performance, as they relate to a typical hearing aid application. The present report covers the pulse capabilities, cycle life and preliminary safety tests. The results are compared with other battery chemistries: secondary lithium-alloy and nickel–metal hydride batteries and primary Zn–air batteries. The cell AC impedance was stable over the frequency range between 1 and 50 kHz, ranging between 5 Ω at the higher frequency and 12 Ω at the lower extreme. Pulse tests were consistent with these values, as the cells were capable of providing a series of 100 mA pulses of 10-s duration. The safety tests suggest that the design is intrinsically safe with respect to the most common types of abuse conditions.
ISSN:0378-7753
1873-2755
DOI:10.1016/S0378-7753(00)00396-7