baterie ni-mh 1100 mah

Aici gasiti totul legat de bateriile folosite in airsoft ,cum functioneaza ele ,cum se incarca/descarca ,care sunt mai bune si de ce.
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AKAGht
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Re: baterie ni-mh 1100 mah

Post by AKAGht » 27 Apr 2012 11:31

romana poate sa inventeze pa XXXXXX, eventual o formula de regenerare chimica, si credema, atunci, nu in airsoft va da lovitura

În functie de conditiile de uzurã, acumulatorii Ni-MH pot avea 300 pânã la
maxim 1000 cicluri de încãrcare / descãrcare .

A nickel–metal hydride cell, abbreviated NiMH or Ni-MH, is a type of rechargeable battery. It is very similar to the nickel–cadmium cell (NiCd). NiMH use positive electrodes of nickel oxyhydroxide (NiOOH), like the NiCd, but the negative electrodes use a hydrogen-absorbing alloy instead of cadmium. A NiMH battery can have two to three times the capacity of an equivalent size NiCd, and their energy density approaches that of a lithium-ion cell.
The typical specific energy for small NiMH cells is about 100 W·h/kg, and for larger NiMH cells about 75 W·h/kg (270 kJ/kg). This is significantly better than the typical 40–60 W·h/kg for Ni–Cd, and similar to the 100-160 W·h/kg for Li-ion. NiMH has a volumetric energy density of about 300 W·h/L (1080 MJ/m³), significantly better than nickel–cadmium at 50–150 W·h/L, and about the same as li-ion at 250-360 W·h/L.
NiMH batteries have replaced NiCd for many roles, notably small rechargeable batteries. NiMH batteries are very common for AA (penlight-size) batteries, which have nominal charge capacities (C) ranging from 1100 mA·h to 3100 mA·h at 1.2 V, measured at the rate that discharges the cell in five hours. Useful discharge capacity is a decreasing function of the discharge rate, but up to a rate of around 1×C (full discharge in one hour), it does not differ significantly from the nominal capacity.[4] NiMH batteries normally operate at 1.2 V per cell, somewhat lower than conventional 1.5 V cells, but will operate most devices designed for that voltage.
About 22% of portable rechargeable batteries sold in Japan in 2010 were NiMH.[5] In Switzerland in 2009, the equivalent statistic was approximately 60%.[6] This percentage has fallen over time due to the increase in manufacture of li-ion batteries: in 2000, almost half of all portable rechargeable batteries sold in Japan were NiMH.[5]
One significant disadvantage of NiMH batteries is a high rate of self-discharge; a NiHM battery will lose as much as 3% of its charge per week of storage. In 2005 a low self-discharge NiMH battery (LSD) was developed. LSD NiMH batteries significantly lower self-discharge, but at the cost of lowering capacity by about 20%.

A fully charged cell supplies an average 1.25 V/cell during discharge, down to about 1.0–1.1 V/cell (further discharge may cause permanent damage in the case of multi-cell packs, due to polarity reversal). Under a light load (0.5 ampere), the starting voltage of a freshly charged AA NiMH cell in good condition is about 1.4 volts;[18] This voltage falls rapidly to about 1.25 volts at 10% depth of discharge (DOD) and then remains almost constant until the cell is over 80% discharged. The voltage then falls rapidly from about 1.2 volts down to 0.8–1.0 volts at which the cell is considered "flat" in most devices. Mid-discharge at a load of 1 ampere, the output is about 1.2 volts; at 2 amperes, about 1.15 volts; the total effective differential internal resistance is about 0.05 ohms. Nickel metal hydride batteries provide a relatively constant voltage for most of the discharge cycle, unlike a standard alkaline where the voltage falls steadily during discharge.[19]
[edit]Over-discharging
A complete discharge of a cell until it goes into polarity reversal can cause permanent damage to the cell. This situation can occur in the common arrangement of four AA cells in series in a digital camera, where one will be completely discharged before the others due to small differences in capacity among the cells. When this happens, the good cells will start to drive the discharged cell in reverse, which can cause permanent damage to that cell. Some cameras, GPS receivers and PDAs detect the safe end-of-discharge voltage of the series cells and auto-shutdown, but devices like flashlights and some toys do not. A single cell driving a load can't suffer from polarity reversal, because there are no other cells to reverse-charge it when it becomes discharged.
Irreversible damage from polarity reversal is a particular danger in systems, even when a low voltage threshold cutout is employed, where cells in the battery are of different temperatures. This is because the capacity of NiMH cells significantly declines as the cells are cooled. This results in a lower voltage under load of the colder cells.[20]


Bagal-l in apa fiarta ( 3 litri ) pui 2 lingurite de sare + spaghete, si faci niste spaghete ENERGIZER
dupa gust, poti adauga ceva sos, eventual daca ai ceva brichete cu led, scoti ledul ( 5-25 buc ) + bulion si faci O-LED SOS

=)) =)) =)) =)) :p :p :p =)) :x =)) =)) =)) =)) :ymhug: :ymhug: :ymhug: :D :D :D
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Re: baterie ni-mh 1100 mah

Post by AKAGht » 27 Apr 2012 11:35

Da-i pace, o murit, asta e
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Re: baterie ni-mh 1100 mah

Post by Rrazak » 27 Apr 2012 12:56

nu, resuscitam.... :x
si de-a dracu incerc......
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me? what? when? where?
Pain is your friend. It will tell you when you are seriously injured. It will keep you awake and angry. And remind you to finish the job and get the hell home. But you know the best thing about pain? It lets you know you're not dead yet

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Claudiu M9
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Re: baterie ni-mh 1100 mah

Post by Claudiu M9 » 27 Apr 2012 15:52

Rrazak wrote: si de-a dracu incerc......
asa te vreau NU TE LASA :ymcowboy:
AIRSOFT ORADEA S.A.F.
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STAY SAFE DON'T TRY THIS

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Re: baterie ni-mh 1100 mah

Post by MILU » 27 Apr 2012 20:40

Daca ii pui niste eros pista poate reusesti
FAT NINJA :))))

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AKAGht
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Re: baterie ni-mh 1100 mah

Post by AKAGht » 27 Apr 2012 20:56

da-i un sock, de la 12v 30-45 sec, si pune-o la incarcat
daca tot nu mere, facem fumigena din ea
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Re: baterie ni-mh 1100 mah

Post by MILU » 27 Apr 2012 21:27

eros pista si edes anna si poate face copii (xerox) :)) :)) :))
FAT NINJA :))))

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Rrazak
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Re: baterie ni-mh 1100 mah

Post by Rrazak » 28 Apr 2012 15:52

si acu, asa, ca sa crapati de ciuda:
merge!
nu stiu ce am facut, dar functioneaza.
Am izolat locurile unde izolatia era desfacuta
am izolat (si am strans bine) ambalajul acolo unde era desfacut (nu se mai misca elementii)
i-am dat un soc la 220 V (in loc de 6 ore l-am tinut la incarcat 7 ore, ca tot una mi-era)
....si functioneaza.
nu stiu cat, luni va voi zice

PS: pentru "amatorii" care citesc acest topic: nu aruncati tot ce nu functioneaza din prima, incercati prima data sa o convingeti sa faca ce trebuie.....ca daca ascultati de baietii ce au comentat acest topic, v-apucati sa faceti ciorba cu acumulatorii :p

l.e.: am uitat sa zic: prima data am descarcat bateria la 6.7 V ;)
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me? what? when? where?
Pain is your friend. It will tell you when you are seriously injured. It will keep you awake and angry. And remind you to finish the job and get the hell home. But you know the best thing about pain? It lets you know you're not dead yet

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