Wavenet Technology Pty Ltd. BM3800D Benutzerhandbuch
Installation________________________________________________ Boomer-III User Manual & Integrator’s Guide
Copyright Wavenet Technology © October 2003
52
BM310012WT04
Internal impedance of 25-30
µΩ per 1.2V cell
Typical cell voltages are 1.2V, with multiple cells used to
obtain higher operating voltages
obtain higher operating voltages
Can withstand high current pulses, which are characteristic of
packet data applications
packet data applications
Typical charge method is
−∆ V (known as negative delta
voltage), which involves charging the battery while looking for
the battery voltage to peak. Then enter a slight overcharge
condition, where the voltage actually begins to decrease prior to
terminating battery charging. NiCad is the most robust battery
technology available today for non vehicular applications.
NiCad can withstand over charging, over discharging, and harsh
environments with reasonable resilience.
the battery voltage to peak. Then enter a slight overcharge
condition, where the voltage actually begins to decrease prior to
terminating battery charging. NiCad is the most robust battery
technology available today for non vehicular applications.
NiCad can withstand over charging, over discharging, and harsh
environments with reasonable resilience.
Raw battery cells or battery packs can be purchased from
suppliers
suppliers
NiMH
Mature technology with potential for improvements in battery
chemistry and energy density over the next five years
chemistry and energy density over the next five years
Higher energy density than NiCad, but lower than Li-ion
Available in standard sizes AA, 2/3A, 4/5A, A and 4/3A and
some prismatic (rectangular) configurations
some prismatic (rectangular) configurations
Exhibits the memory effect in a manner similar to NiCad
technology, but at a less pronounced level
technology, but at a less pronounced level
Internal impedance of 35-49
µΩ per 1.2V cell
Typical cell voltages are 1.2V, with multiple cells used to
obtain higher operating voltages
obtain higher operating voltages
Earlier NiMH battery chemistry could be damaged by high
current discharge pulses. Newer battery chemistry has
eliminated this problem. When purchasing batteries of this type,
determine if high current pulse discharging is an issue.
current discharge pulses. Newer battery chemistry has
eliminated this problem. When purchasing batteries of this type,
determine if high current pulse discharging is an issue.
Typical charge method is dT/dt, where T is temperature. As the
battery reaches full charge, any further energy is dissipated as
heat. A temperature threshold is used to terminate the charge
cycle in conjunction with voltage monitoring. NiMH is more
sensitive to overcharging then NiCad and exhibits decreased
capacity if repetitively overcharged.
battery reaches full charge, any further energy is dissipated as
heat. A temperature threshold is used to terminate the charge
cycle in conjunction with voltage monitoring. NiMH is more
sensitive to overcharging then NiCad and exhibits decreased
capacity if repetitively overcharged.
Raw battery cells or battery packs can be purchased from
suppliers.
suppliers.
Li-ion
Reasonably mature technology leaving lots of potential for
increased capacity
increased capacity
Higher energy density than either NiCad or NiMH