Accumulators for backup sources
Station batteries (backup accumulators) are the most often lead-acid sealed batteries based on the VRLA (Valve Regulated Lead Acid), which is a system of pressure control in batteries with use of a pressure relief valve. During operation, the pressure in the accumulator increases due to the formation of gases on the electrodes, and this pressure is maintained and regulated by means of valves (rubber cap). The valves are necessary, because the hydrogen produced increases the pressure inside the accumulator. When a certain overpressure is reached, the gases are released and the pressure inside the accumulator drops. The release of overpressure through the valve is repeated periodically and the frequency depends on the operating conditions (especially the temperature and voltage during charging). When the overpressure is released, the water vapor currently present in the gases inside the accumulator is also released, causing a gradual drying out of the electrolyte. Thanks to this technology, the accumulator is suitable for enclosed spaces (backup sources), is safe (there is no risk of leakage of hazardous substances such as sulfuric acid), and has an extended shelf life.
VRLA batteries are divided into two subgroups - AGM batteries and GEL batteries
The AGM (Absorbed Glass Mat) lead-acid battery is a type of VRLA battery in which the electrolyte (sulfuric acid with a density of 1.3 g / cm³) is soaked in a nonwoven fabric made of glass microfiber. AGM batteries are almost 100% hermetic and maintenance-free, characterized by low self-discharge (1-3% of capacity in Ah per month) and the ability to deliver high currents. They are used for applications in uninterruptible power supplies (UPS), electronic fire protection systems (EPS), electronic security systems (ESS), and telecommunications.
GEL accumulators are a subset of lead VRLA batteries with the electrolyte solidified in the form of a gel - sulfuric acid is mixed with a very fine glass powder with a particle size in the order of micrometers, which causes the electrolyte to gel. It can be operated in any position due to the non-liquid nature of the electrolyte. Thanks to this technology, however, they are more expensive than AGM batteries.
Another type of lead-acid batteries with liquid electrolyte are EFB (Enhanced Flooded Battery) batteries, which are also maintenance-free. They have a special polyester fiber separator and thicker electrode plates. However, you will not find EFB batteries on our website - they are mentioned here for information only.
The average service life of standard VLRA / AGM lead-acid batteries is 3 to 5 years depending on the conditions in which they are operated (discharging and charging currents, frequency of charging and discharging cycles, ambient temperature, etc.). Accumulators of Long Life or Deep Cycle series (eg YUASA, Goowei, Ultracell, CSB) have this average lifespan double - 8 to 12 years. However, they are usually significantly more expensive.
The optimum service life is given in cycles at a temperature of + 20 ° C and with a regular discharge to 50% D.O.D. (D.O.D. - depth of discharge, 50% of the stored energy is taken from the battery). After 50% of the capacity discharge, immediate charging to the full capacity of the battery in Ah should follow. This is important especially in cases where the battery is operated at low temperatures, especially around the freezing point (0 ° C and below). A fully charged battery withstands frost up to the manufacturer's guaranteed temperatures, usually -20 ° C (the electrolyte does not freeze), although it has a reduced capacity in Ah.
UL94 - standard for safety of (non) flammability of plastic materials. This standard is published by Underwriters Laboratories, USA. The standard specifies the tendency of the material to either extinguish or spread the flame after ignition of the sample. It is harmonized with IEC 6070, ISO 9772, and 9773.
UL94-V0: burning stops within 10 seconds on a vertical sample; drops of particles of molten material are allowed if they are not ignited.
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HOT NEWS!
PG-12V9 F2 (PowerSonic, U.K.)
Uzavřený olověný akumulátor - 12V/8.5Ah - VRLA/AGM - pro záložní napájení EZS/EPS - výstupní terminály F2 - životnost 6 let
On request
from 53,75 €
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HOT NEWS!
IM-CR123A (Ultratech®, CN)
Lithiová 3V baterie - typ CR123A - 1500 mAh - pro napájení bezdrátových senzorů a čidel
In stock (40 pcs)
3,96 €
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NEW ACTION !
PG-12V21 B (PowerSonic, U.K.)
Uzavřený olověný akumulátor - 12V/21Ah - VRLA/AGM - výstupní terminály T12 (M5) - životnost 5/6 let - pro EZS/EPS záložní napájení
On request
107,92 €
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NEW
CSB UPS12580 F2 (CSB, Taiwan)
Sealed lead acid battery - 12V/9Ah - VRLA/AGM - UPS series - output terminals F2 - for ESS/FPS/UPS and other applications - service life 4 to 6 years
In stock
from 45,42 €
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AKU OTL65-12 (Goowei, China)
Uzavřený olověný akumulátor - 12V/65Ah - Long Life/Deep Cycle - VRLA/AGM - výstupní terminály T3 (M6) - pro EZS/EPS/UPS a další aplikace - životnost 10 až 12 let
In stock
from 191,25 €
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AKU OTL45-12 (Goowei, China)
Uzavřený olověný akumulátor - 12V/45Ah - Long Life/Deep Cycle - VRLA/AGM - výstupní terminály T1 (M6) - pro EZS/EPS/UPS a další aplikace - životnost 10 až 12 let
In stock
from 149,58 €
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AKU OTL26-12 (Goowei, China)
Uzavřený olověný akumulátor - 12V/26Ah - Long Life/Deep Cycle - VRLA/AGM - výstupní terminály T0 (M4) - pro EZS/EPS/UPS a další aplikace - životnost 10 až 12 let
In stock
from 95,42 €
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DURACELL LR03 INDUSTRIAL (Duracell®, USA)
Tužkový monočlánek typ AAA - alkalický 1,5V - LR03 - řada Industrial - výběrový typ - garantované parametry
In stock (11 pcs)
1,26 €
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MXS 5.0 (CTEK®, Sweden)
Automatická nabíječka Pb aku - 12V 0.8A/5A - 4 nabíjecí programy - 8 stupňů nabíjení - teplotní čidlo - krytí IP65 - krokosvorky - ISK konektor - záruka 5 let
In stock (1 pcs)
85,80 €
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NEW
AKU OTL20-12 (Goowei, China)
Uzavřený olověný akumulátor - 12V/20Ah - Long Life/Deep Cycle - VRLA/AGM - výstupní terminály F3 (L1) - pro EZS/EPS/UPS a další aplikace - životnost 10 až 12 let
In stock
from 77,08 €
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AKU OT3.4-12 (Goowei, China)
Uzavřený olověný akumulátor - 12V/3.4Ah - VRLA/AGM - pro EZS/EPS a další aplikace - výstupní terminály F1 - životnost 3 až 5 let
In stock
from 17,92 €
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NP24-12 (Yuasa, U.K.)
Uzavřený olověný akumulátor - 12V/24Ah - VRLA/AGM - pro EZS/EPS a další aplikace - výstupní terminály F (M5) - životnost 5 let
In stock (1 pcs)
137,08 €
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ACTION !
AKU UL26-12 (Ultracell, U.K.)
Uzavřený olověný akumulátor - 12V/26Ah - VRLA/AGM/GEL - připojovací terminály F3 (M5) - pro EZS/EPS a další aplikace - životnost 4 až 6 let
In stock
78,75 €
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NEW
NP38-12I (Yuasa, U.K.)
Uzavřený olověný akumulátor - 12V/38Ah - VRLA/AGM - pro EZS/EPS a další aplikace - výstupní terminály F (M5) - životnost 5 let
In stock
182,50 €
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CSB GP12260 (CSB, Taiwan)
Uzavřený olověný akumulátor - 12V/26Ah - VRLA/AGM - řada GP - výstupní terminály F3 (B3) - redukce na Faston F2 - pro EZS/EPS a další aplikace - životnost 4 až 6 let
In stock
from 99,58 €