Sunnyway Battery Testing and Standards
7.1 Capacity
The discharge capacity is measured by discharging the battery
at the discharge current under the ambient temperature as set
forth in the specifications. The charge before and after the
above discharge must be measured using the method indicated
in the specifications. Discharge the battery at 0.25CA for 3.5V/4V,
5.25V/6V and 10.5V/12V batteries.
In each case the discharging time must be greater than 180 minutes.
The charge will be performed under the conditions of 4.80V-5.00v/4V,
7.20-7.50V/6V and 14.40V-15.00V/12.00V battery (Maximum current:
0.4CA).
7.2 Cyclic Life Test
This test is carried out under the ambient temperature and the
charge/discharge conditions required by the specifications.
In the event the charge/discharge conditions are not set forth
in the specification, the charge and discharge must be repeated
under the ambient temperature at 25+2≧, the resistance load
discharge current should be 0.25CA, the discharge cut-off voltage
of discharge should be: 3.5V/4V, 5.25V/6V,1.50V/12V,max, current
0.4CA or less. For charging .the cyclic life must be held at
50%of the initial discharge capacity and last for at least 150
cycles.
7.3 Overcharge Test
The fully charged battery is overcharged in this test at the
constant current of 0.1CA for 48 hours, and then let stand
for one hour. The battery is then continuously discharged
at a constant current of 0.05CA until it discharges to an
average of 1.75V per cell. The appearance of the tested battery
after the test must be normal, and the capacity should be
95% or the nominal capacity.
7.4 Sealing Test
The following functions must be satisfied by the fully charged
battery after it is overcharged for 48 consecutive hours at
a 0.1CA current and for 24 consecutive hours at a 0.005CA
current.
(a)Sealing Reaction Efficiency
The sealing reaction efficiency must be 90% or more of the
quantity of electricity which is converted by 25≧1atm per
Ah.
(b)Safety Valve Function
The safety valve must be opened or closed without fail within
the range of internal pressure of the battery from 30kpa to
50kpa.
( c)Safety
The battery must be free of leaks and other defects.
， 7.5 Storage Test
The fully charged battery will be stored for 6 months at a
temperature under 20≧＼5≧. and discharged continuously at the
constant current of 0.05CA up to the average cut-off voltage
of discharge of 1.75Vper coll. The capacity at this time must
be 60% or more of the nominal capacity.
， 7.6 Vibration Test
A vibration of 1.000 cycles per minute at the full amplitude
of 4mm will be applied on any side of the fully charged battery
for 60min. Then check to see if the battery has has no broken
parts or leaks and its terminal voltage is higher than the
nominal voltage.
， 7.7 Shock Test
The fully charged battery will be dropped three times without
applying any extra force from 0.2m high onto a hard wood surface
(about 50mm thick) Then check to see if the battery has endured
no noticeable breakage or leaks, and its terminal voltage
is higher than the nominal voltage.
， 7.8 Other Tests
Other tests, if required by the specification, shall be conducted
according to the instructions given in the specifications.
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