Wet Nicad Rechargeable Batteries Manufacturer 1.2 V 770ah Gn770 Kpm770

• Type: Ni-CD Battery
• Usage: Electric Power, Boat
• Nominal Voltage: 1.2V
• Discharge Rate: Ultrahigh Discharge Rate
• Shape: Pristmatic
• Electrolyte: Alkaline
• Model NO.: KPL770
• Installation: Fixed
• Rechargeable: Chargeable
• Transport Package: Plywood Case
• Specification: 395*185*560mm
• Trademark: HENGMING
• Origin: China
• HS Code: 8507300000
• Production Capacity: 8000cell/Month

Product Description

Vented cell (wet cell, flooded cell) NiCd batteries are used when large capacities and high discharge rates are required. Traditional NiCd batteries are of the sealed type, which means that charge gas is normally recombined and they release no gas unless severely overcharged or a fault develops. Unlike typical NiCd cells, which are sealed, vented cells have a vent or low pressure release valve that releases any generated oxygen and hydrogen gases when overcharged or discharged rapidly. Since the battery is not a pressure vessel, it is safer, weighs less, and has a simpler and more economical structure. This also means the battery is not normally damaged by excessive rates of overcharge, discharge or even negative charge.

They are used in aviation, rail and mass transit, backup power for telecoms, engine starting for backup turbines etc. Using vented cell NiCd batteries results in reduction in size, weight and maintenance requirements over other types of batteries. Vented cell NiCd batteries have long lives (up to 20 years or more, depending on type) and operate at extreme temperatures (from −40 to 70 °C).

A steel battery box contains the cells connected in series to gain the desired voltage (1.2 V per cell nominal). Cells are usually made of a light and durable polyamide (nylon), with multiple nickel-cadmium plates welded together for each electrode inside. A separator or liner made of silicone rubber acts as an insulator and a gas barrier between the electrodes. Cells are flooded with an electrolyte of 30% aqueous solution of potassium hydroxide (KOH). The specific gravity of the electrolyte does not indicate if the battery is discharged or fully charged but changes mainly with evaporation of water. The top of the cell contains a space for excess electrolyte and a pressure release vent. Large nickel-plated copper studs and thick interconnecting links assure minimum equivalent series resistance for the battery.


Dimensions         
         
 Specifications

Nominal Voltage		1.2V
Capacity(5HR,20ºC)		770Ah
Dimension	Length	395mm
	Width	180mm
	Total Height	560mm
Approx. Weight(filled)		54Kg
Internal resistance (Fully charged, 20ºC)		0.32*10^-3Ω
Capacity affected by temperature (5HR)	20ºC	≥100%
	-18ºC	≥80%
Self-discharge (20ºC)	28 days	<20%
Nominal operating temperature		20ºC±5ºC
Operating temperature range		-20ºC~50ºC
Float charging voltage(20ºC)		1.48 ~1.50V
Charging current		154A
Boost charge (20ºC)		1.5-1.70V
Terminal material		Nickel- Clad  Steel

   According to IEC cycle time is more than 500,
                     float charging life is more than 15 years.
    ABS container.


 Constant Current Discharge Characteristics (A, 20ºC)

F.V/TIME	8h	5h	3h	2h	1h	30min	20min	15min	10min	5min	1min
1.0V	97	154	239	323	501	616	655	693	770	847	939
1.05V	96	149	216	308	462	501	539	616	655	770	924
1.1V	95	146	208	270	354	424	462	501	539	616	809
1.14V	91	139	193	216	293	347	385	424	462	501	655

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