DKGB2-900-2V900AH SEALED GEL LEAD ACID BATTERY

Technical Features

1. Charging efficiency: The usage of imported low resistance raw materials and advanced process help make theinternal resistance smaller and the acceptance ability of small current charging stronger.
2. High and low temperature tolerance: Wide temperature range (lead-acid:-25-50 C ,and gel:-35-60 C), suitablefor indoor and outdoor use in varies environments.
3. Long cycle-life: The design life of lead acid and gel series reach to more than 15 and 18 years respectively, forthe arid is corrosion- resistant. and electrolvte is without risk of stratification by using multiple rare-earth alloy ofindependent intellectual property rights, nanoscale fumed silica imported from Germany as base materials, andelectrolyte of nanometer colloid all by independent research and development.
4. Environment-friendly: Cadmium (Cd), which is poisonous and not easy to recycle, does not exist. Acid leakageof gel electrolvte will not happen. The battery operates in safety and environmental protection.
5. Recovery performance: The adoption of special alloys and lead paste formulations make a low self-dischargerate, good deep discharge tolerance, and strong recover capability.

Parameter

Model	Voltage	Capacity	Weight	Size
DKGB2-100	2v	100Ah	5.3kg	171*71*205*205mm
DKGB2-200	2v	200Ah	12.7kg	171*110*325*364mm
DKGB2-220	2v	220Ah	13.6kg	171*110*325*364mm
DKGB2-250	2v	250Ah	16.6kg	170*150*355*366mm
DKGB2-300	2v	300Ah	18.1kg	170*150*355*366mm
DKGB2-400	2v	400Ah	25.8kg	210*171*353*363mm
DKGB2-420	2v	420Ah	26.5kg	210*171*353*363mm
DKGB2-450	2v	450Ah	27.9kg	241*172*354*365mm
DKGB2-500	2v	500Ah	29.8kg	241*172*354*365mm
DKGB2-600	2v	600Ah	36.2kg	301*175*355*365mm
DKGB2-800	2v	800Ah	50.8kg	410*175*354*365mm
DKGB2-900	2v	900AH	55.6kg	474*175*351*365mm
DKGB2-1000	2v	1000Ah	59.4kg	474*175*351*365mm
DKGB2-1200	2v	1200Ah	59.5kg	474*175*351*365mm
DKGB2-1500	2v	1500Ah	96.8kg	400*350*348*382mm
DKGB2-1600	2v	1600Ah	101.6kg	400*350*348*382mm
DKGB2-2000	2v	2000Ah	120.8kg	490*350*345*382mm
DKGB2-2500	2v	2500Ah	147kg	710*350*345*382mm
DKGB2-3000	2v	3000Ah	185kg	710*350*345*382mm

production process

Lead ingot raw materials

Polar plate process

Electrode welding

Assemble process

Sealing process

Filling process

Charging process

Storage and shipping

Certifications

More for reading

In the photovoltaic energy storage system, the role of the battery is to store electric energy. Due to the limited capacity of a single battery, the system usually combines multiple batteries in series and parallel to meet the design voltage level and capacity requirements, so it is also called the battery pack. In the photovoltaic energy storage system, the initial cost of the battery pack and the photovoltaic module is the same, but the service life of the battery pack is lower. The technical parameters of the battery are very important to the system design. During the selection design, pay attention to the key parameters of the battery, such as battery capacity, rated voltage, charge and discharge current, discharge depth, cycle times, etc.

Battery capacity
The capacity of the battery is determined by the number of active substances in the battery, which is usually expressed in ampere hour Ah or milliampere hour mAh. For example, the nominal capacity of 250Ah (10hr, 1.80V/cell, 25 ℃) refers to the capacity released when the voltage of a single battery drops to 1.80V by discharging at 25A for 10 hours at 25 ℃.

The energy of the battery refers to the electrical energy that can be given by the battery under a certain discharge system, usually expressed in watt hours (Wh). The energy of the battery is divided into theoretical energy and actual energy: for example, for a 12V250Ah battery, the theoretical energy is 12 * 250=3000Wh, that is, 3 kilowatt hours, indicating the amount of electricity that the battery can store. If the discharge depth is 70%, the actual energy is 3000 * 70%=2100 Wh, that is, 2.1 kilowatt hours, which is the amount of electricity that can be used.

Rated voltage
The potential difference between the positive and negative electrodes of the battery is called the rated voltage of the battery. The rated voltage of common lead-acid batteries is 2V, 6V and 12V. The single lead-acid battery is 2V, and the 12V battery is composed of six single batteries in series.

The actual voltage of the battery is not a constant value. The voltage is high when the battery is unloaded, but it will decrease when the battery is loaded. When the battery is suddenly discharged with a large current, the voltage will also drop suddenly. There is an approximate linear relationship between the battery voltage and the residual power. Only when the battery is unloaded, this simple relationship exists. When the load is applied, the battery voltage will be distorted due to the voltage drop caused by the internal impedance of the battery.

Maximum charging and discharging current
The battery is bidirectional and has two states, charging and discharging. The current is limited. The maximum charging and discharging currents are different for different batteries. The charging current of the battery is generally expressed as a multiple of the battery capacity C. For example, if the battery capacity C=100Ah, the charging current is 0.15 C × 100=15A。

Discharge depth and cycle life
During the use of the battery, the percentage of the capacity released by the battery in its rated capacity is called the discharge depth. The battery life is closely related to the discharge depth. The deeper the discharge depth is, the shorter the charging life is.

The battery undergoes a charge and discharge, which is called a cycle (one cycle). Under certain discharge conditions, the number of cycles that the battery can withstand before working to a specified capacity is called cycle life.

When the battery discharge depth is 10%~30%, it is shallow cycle discharge; The discharge depth of 40%~70% is medium cycle discharge; The discharge depth of 80%~90% is deep cycle discharge. The deeper the daily discharge depth of the battery during long-term operation, the shorter the battery life. The shallower the discharge depth, the longer the battery life.

At present, the common storage battery of photovoltaic energy storage system is electrochemical energy storage, which uses chemical elements as energy storage medium. The charging and discharging process is accompanied by the chemical reaction or change of the energy storage medium. It mainly includes lead acid battery, liquid flow battery, sodium sulfur battery, lithium ion battery, etc. At present, lithium battery and lead battery are mainly used.