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6v NMH/NiCd Battery Tester - I
designed this circuit to test
rechargeable six volt battery packs
under constant current conditions. As
designed, the circuit applies a 10 amp
load to the battery pack. A heat sink
must be used on the main power
transistor.
Battery Characterizer
Battery Simulator Provides Current
Limiting - EDN-Design Ideas: A
constant-voltage active load can perform
as a battery during charge cycle. You
can set load voltage from 5 to 35V by
using potentiometer PV and thus can
simulate batteries ranging from 6 to
32V..
Button Battery Cell Internal Resistance
Measurement Circuit - The open cell
voltage of a small silver oxide button
cell battery remains very close to 1.5
volts over most of the life of the
cell. However, there is a relationship
between battery health and the internal
resistance of the cell. This circuit
when used in conjunction with an
oscilloscope will measure the internal
resistance. You will have to use a
known good cell as a reference.
Constant Voltage Load Tests Battery
Chargers - EDN-Design Ideas
Discharger - The reason I designed
this discharger are many, however I will
list a typical example. A modeller
charges his batteries for 14 hrs, then
goes to the field for a fly. He then
rests for a week, then charges his
batteries again for 14 hrs and flies
again. The third time, he repeats the
procedure, then wonders why his aircraft
has a major argument with the runway.
The problem with this method is that he
is recharging a battery pack which after
the first week, is in an unknown state
of charge.
Discharger for Receiver Battery Packs
LED Battery Condition Indicator
Phantom Power Battery Test Circuit -
LED will light when battery is over42
volts
Self-powered Fast Battery-Tester -
Tests 1.5 to 15 Volt cells. Two-LED
display, no power supply required.
Simple but reliable car battery Tester
Simple Car Battery Charger psimages
- This very simple circuit uses a
transformer ,two diodes , a capacitor
and an ammeter. To charge a battery
just connect + and terminals of
circuit to corresponding terminals of
battery. When battery is not charged,
ammeter reading shows 1-3 amps.
Simple car battery Tester - This
circuit uses the popular and easy to
find LM3914 IC. This IC is very simple
to drive, needs no voltage regulators
(it has a built in voltage regulator)
and can be powered from almost every
source…
Small Battery Capacity Tester - The
only truly accurate way to measure the
current capacity of a battery is by
connecting the battery to a constant
current load and measure how long the
battery can sustain that current before
its voltage drops below a recommended
“cutoff” point.
Solid state relays simplify monitoring
electric car Battery Voltage - EDN-Design
Ideas: Figure 1 shows the propulsion
system of an electric vehicle. It
includes an electric motor, drive
electronics, a mechanical transmission,
vehicle control/power management, a
charging system, and a battery. The
long-term performance of the electric
vehicle depends on ensuring the
electrical health of the battery and its
charging system..
Test Batteries Without a Voltmeter -
EDN-Design Ideas
Testing Sanyo's Ene loop Low
Self-Discharge Rechargeable Battery |
