Godson Technology Co., Ltd |
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4.8V D4000mAh NiCd Battery Stick Pack With Competitive Price
Application:
Pos. | Application fields | Application of the product |
1 | Lighting | emergency lighting, emergency power supply, solar lights, searchlingts, flashlights |
2 | Power tools | electric drills, planers, saws, power granted |
3 | Electronic toys | remote control car, remote control boats, aircraft, model aircraft |
4 | Communication equipment | cordless phones, walkie-talkie |
5 | Other uses | electric shavers, massagers, electric tooth brush |
Product parameters:
Standard Charge Mode: 0.1C for 16 hours
Cycle Life: ≥500 times
Operating Temperature: (-20℃) - (+70℃)
Storage Temperature: (-30℃) - (+60℃)
Cell Dimension: 23 +0 -1.0(D), 33.5±0.5(H)
Expected Life: 5 years
Packaging: Standard export package or customized package
What is the Principle of Ni-Cd Battery?
As a Ni-Cd Battery Pack Supplier, share with you. Nickel cadmium
batteries are located in the Cd of the negative electrode and
OH-synthesized cadmium hydroxide in NaOH, and attached to the
anode, and also emit electrons. The electrons travel along the wire
to the cathode, and the nickel dioxide of the cathode reacts with
the water in the sodium hydroxide solution to form nickel hydroxide
and hydroxide ions. The nickel hydroxide will attach to the anode,
and the hydroxide ions will return to hydrogen. In sodium oxide
solution, the concentration of sodium hydroxide solution does not
decrease with time.
The active material on the positive plate of a Ni-Cd Battery is
composed of nickel oxide powder and graphite powder. Graphite does
not participate in chemical reactions and its main function is to
enhance electrical conductivity. The active material on the
negative plate is composed of cadmium oxide powder and iron oxide
powder. The function of the iron oxide powder is to make the
cadmium oxide powder have higher diffusivity, prevent
agglomeration, and increase the capacity of the polar plate. The
active materials are wrapped in perforated steel strips, and after
being pressed and formed, they become the positive and negative
plates of the battery. The polar plates are separated by
alkali-resistant hard rubber insulating rods or perforated PVC
corrugated plates. The electrolyte is usually potassium hydroxide
solution. Compared with other batteries, the self-discharge rate of
NiCd batteries (that is, the rate of loss of charge when the
battery is not in use is moderate).
During the use of NiCd batteries, if they are not completely
discharged, they will be recharged. When they are discharged next
time, they will not be able to discharge the full amount of
electricity. For example, after discharging 80% of the power and
then fully charging, the battery can only discharge 80% of the
power. This is called the memory effect. Of course, several
complete discharge / charge cycles will return the NiCd battery to
normal operation. Due to the memory effect of NiCd batteries, if
not fully discharged, each battery should be discharged below 1V
before charging. Constantly charge NiCd batteries in the range of
0.05C to more than 1C. Some low-cost chargers use absolute
temperature to terminate charging. Although simple and low in cost,
this method of charging termination is inaccurate. A better method
is to stop charging by detecting the voltage drop when the battery
is fully charged. For NiCd batteries with a charging rate of 0.5C
or higher, the -ΔV method is more effective. -ΔV charge termination
detection should be combined with battery temperature detection, as
aged batteries and mismatched batteries may reduce ΔV.
Through detecting the temperature rise rate (dT / dt) can achieve
more accurate full charge detection, this full charge detection is
better than the fixed temperature termination for the battery. The
charge termination method based on the combination of ΔT / dt and
-ΔV can prevent the battery from overcharging and extend the
battery life. Fast charging can improve charging efficiency. At a
charging rate of 1C, the efficiency can be close to 1.1 (91%), and
the time to charge an empty battery is a little more than 1 hour.
When charging at 0.1C, the efficiency drops to 1.4 (71%), and the
charging time is about 14 hours.
Ni-Cd Battery Cell Performance:
1. Ni-Cd Cell Charge Curve At 0.1C For 16h At 55 Degree
2. Ni-Cd Cell Discharge Curve At 0.25C At 55 Degree
3. Ni-Cd Cell Charge Efficiency At Different Temperature
4. Ni-Cd Cell Capacity Change At Permanent Charge At 55 Degree (0.05C Floating)
5. Ni-Cd Cell Cycle Life Curve