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Xtar VC2 duálna Li-ion nabíjačka s LCD displejom

Cena 19.900
Dostupnosť: na sklade
Cena bez DPH: 16.583
Kód produktu: CHXTARVC2
Výrobca: XTAR Co., Ltd
Záručná doba: 24 mesiacov
KS

Xtar VC2 duálna Li-ion nabíjačka s LCD displejom

VC2 je digitálny nástupca, úspešnej USB nabíjacej série MC. Medzi unikátne
vlastnosti Xtar VC2 patrí LCD displej, ktorý je na trhu veľmi zriedkavý a slúži
aj ako tester zobrazenia aktuálnych stavov akumulátorov. Pri pohľade na LCD
displej, môžete určiť, koľko reálnej kapacity, ešte majú akumulátory a koľko
ich ešte treba dobíjať. Pri pohľade na napätie akumulátora, zobrazenom na
LCD displeji, môžete okamžite vydieť, koľko energie ešte ostalo v
akumulátoroch. Nabíjačka vie Inteligentne určiť príkon a automaticky nastaví
vhodný nabíjací prúd 0,15 ~ O.5 A. VC2 je kompatibilná so štandartným USB
rozhraním, nie je potrebné preto míňať peniaze navyše. Je kompatibilná aj s
IMR lítiovými akumulátormi malej kapacity. Každý nabíjací kanál je
nezávislý. LCD displej zobrazuje stav oboch akumulátorov v reálnom čase a
každý akumulátor zvlášť. Veľmi rýchlo vie identifikovať zlé akumulátory a
včas na ne upozorniť užívateľa. Indikátor stavu nabíjania na obrazovke, bude
blikať 3x každých 10 sekúnd, vtedy sú akumulátory plne nabité.

VC2 sa používa na nabíjanie 10440/14500/14650/16340/17500/17670/18350/18500/18650/18700/22650/25500/26650
3.6 / 3.7V Li­ion akumulátorov.

XTAR VC2, má špeciálnu technológiu, ktorá
dokáže zachrániť a obnoviť mŕtve akumulátory ­ 0V. V tedy sa aktivuje
funkcia, ktorá prebudí k životu príliš vybité akumulátory, ktoré môžete opäť
používať.

Nabíjačky XTAR používajú technológie, ako je ochrana proti
prehriatiu, ochrana proti skratu a polarity, ochrana proti prepólovaniu. Ako aj
pri iných nabíjačkách, poskytuje aj VC2 tri stupne spôsobu nabíjania TC­CCCV.
TC ­ Udržiavací prúd, je malý prúd pre nabíjanie akumulátorov, kedy je
kapacita akumulátora veľmi nízka a chráni akumulátor pred poškodením. CC ­
konštantný prúd, zaisťuje efektívne nabíjanie. CV ­ konštantné napätie sa
používa na utlmenie prúdu pri procese nabíjania, ked sa proces blíži ku koncu.
Nabíjačka vie automaticky zmeniť vhodý nabíjací prúd v závislosti na
príkone. Používa vysoko výkonnú inteligentnú PWM technológiu, ktorá výrazne
znižuje straty energie. Nabíjačka je chránená pred poškodením nesprávnym
vložením akumulátora. Telo nabíjačky XTAR VC2 je vyrobené z PC a ABS
odolného ohňovzdorného materiálu s perfektným odvodom tepla a vysokou
teplotnou odolnosťou. Je hu možné napájať z USB rozhrania, čo zaručuje jej
univerzálnosť. VC2 automaticky preruší nabíjanie po jeho dokončení. Štart
technológia SOFT, predlžuje životnosť akumulátorov. Konštantný prúd a
napätie nabíjania, bude akumulátor udržiavať trvalo a stabilne. Nabitie
akumulátora prebehne až na 4,2V a automaticky sa zastaví po
dokončení nabíjania a reštartovaní funkcie nabíjania.


Popis produktu:
Dve nezávislé pozície pre nabíjanie (je možné dobíjať jeden alebo dva
akumulátory, rôzne vybité a rôznych druhov)
Nabíjací algoritmus: TC, CC, CV
Nabíjací prúd: 0mAh až 500mAh

Nabíjanie je kontrolované mikroprocesorom a vypína sa automaticky podobití akumulátoru

Podporované akumulátory: 10440/14500/14650/16340/17500/17670/18350/18500/18650/18700/22650/25500/26650
3.6 / 3.7V Li­ion akumulátory
Ochrana proti opačnému vloženiu akumulátorov
Rozmery: 13,1 x 6,6 x 3,3 cm
Váha nabíjačky 109g
Nabíjací prúd sa automaticky mení.
Balenie obsahuje nabíjačku, Micro USB kábel
Prevádzková teplota 0 ~ 40
Vstupné napätie/ prúd: DC 5V 1.0A
Výstupný prúd (nabíjaci prúd): 0 až 0,5A CC: 500mAh±50mAh
Vypínacie napätie nabíjania: 4,2 ± 0.05V / 1.48V ± 1%


Ovládanie:
Nabíjačka sa ovláda plne automaticky. Pripojte USB kábel do nabíjačky
a druhý koniec do USB rozhrania. LCD displej sa rozsvieti. Po vložení
akumulátoru do nabíjačky sa na displeji zobrazia aktuálne hodnoty
akumulátora a začne sa nabíjať. Po nabití akumulátora nabíjačka ukončí
nabíjanie. Akumulátor môžete vybrať z nabíjačky a používať. Po ukončení
nabíjania odpojte USB kábel z rozhrania.

 

Review of Charger Xtar VC2Charger Xtar VC2

DSC_7961

DSC_7963 DSC_7962

Xtar makes many LiIon chargers, this is a usb powered dual channel charger with display. The charger can charge with up to 0.5A for each channel, but the current is not user adjustable.

DSC_7955 DSC_7956 DSC_7957 DSC_7958

I got the charger in a small cardboard box with the specifications printed on it.

DSC_7959

Inside the box the charger was in a small fabric bag, this can be useful if it is used as a travel charger.

DSC_7960

The bag contained the charger, a usb cable, a warranty card and a instruction manual.

DSC_7964

The charger is usb powered from a micro usb connector, but there is not a power supply included, i.e. you must supply your own usb power supply/charger. With a maximum charger current of 1A the charger works best with high power chargers, but will reduce its current if the power supply is overloaded.
I have tested a few usb power supplied.

DSC_7984

There is only a display as user interface, no buttons or switches.

DSC_7972

The display uses dials to show voltage and maximum current, it does also have some 7 segment digits to show charged capacity.

DSC_7970 DSC_7971

The current dial only shows the maximum charge current, the actual current is lower when the battery is in the CV phase.
The voltage dials shows the actual voltage when in range:
0V Battery voltage is low, charger is only using low current, display may show "Err" if there is a problem with the batteries.
3.0V Voltage is high enough to start regular charge.
3.5V-4.2V Regular charge, display is within 0.1 volt.

DSC_7967 DSC_7968

The charger can handle both button top and flat top batteries.
The slider moves smoothly and can hand cells from 30mm to 71 mm long.

supportedBatteryTypes

supportedBatterySizes DSC_7980 DSC_7981
DSC_7982 DSC_7979 DSC_7978 DSC_7977

The charger can handle 71 mm long batteries, including flat top cells.



Measurements charger
  • When charging the last digit in the capacity displays will flash.
  • The charger will charge with 2.4mA from 0 volt and display will show "Err"
  • At 0.2 volt it will start charging with 340mA (It will be down to 180mA 2.9 volt) at and display will show mAh.
  • At 2.9 volt regular charge current will be applied.
  • When charging two batteries with reduced current, they may not charge at the same speed.
  • When charge is finished the charger will charge with 0.3mA.
  • Charger will restart if voltage drops to 3.9 volt.
  • Charge will restart charging after power loss, or battery insertion.
  • When not connected to power it will drain about 0.1mA from a battery.
  • Current dial will show maximum possible charge current, not actual charge current.
  • Charge current steps down if usb voltage drops too much and may step up if usb voltage recovers (Like when one slot is finished).
  • Voltage dial will show within 0.1 volt when voltage is above 3.5 volt, between 4.1V and 4.2V is does also have a 4.15V position.
  • Voltage dial is within 0.1 volt when voltage is above 3.5 volt.
  • The 3 volt position on the voltage dial looks like it signals "start of regular charge", i.e. 2.9 volt.
  • mAh display flashes "Full" when the corresponding battery is full.
  • The background light will flash when at least one battery is full.

The light green line is usb current consumption, the dark green is charge current.

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The charger does a nice CC/CV charge with a termination at about 50mA. There is some oscillation during the final part of the charge, but it does not affect the result.
The display shows 2918mAh charged into the battery.

Xtar%20VC2%20(PA18650-31)%20%232

The other channel has a similar result.
The display shows 2932mAh charged into the battery.

Xtar%20VC2%20(BE18650-26)%20%231

The 2600mAh battery has a very long CV phase, probably because it is getting old.
The display shows 2549mAh charged into the battery.

Xtar%20VC2%20(PA18650-34)%20%231

The 3400mAh takes slightly longer to charge.
The display shows 3254mAh charged into the battery.

Xtar%20VC2%20(AW16340-IMR)%20%231

The charger has no problem with my old IMR cell.
The display shows 177mAh charged into the battery.

Xtar%20VC2%20(AW18350-IMR)%20%231

The display shows 715mAh charged into the battery.

Xtar%20VC2%20(KP14500-08)%20%231

The display shows 784mAh charged into the battery.

Xtar%20VC2%20falling%20voltage%20(PA18650-31)%20%231

Supplying a falling voltage to the charger shows that the current regulation works at around 4.7 volt. When the voltage gets below 4.7 volt the charger will start reducing charge current, until the voltage is above 4.7 volt again. If this does not happen the charger will stop completely.

Xtar%20VC2%201ohm%20(PA18650-31)%20%231

To see the current limiter in function I put a 1ohm resistor in series with the power supply, this simulates a fairly bad usb power supply.
As can be seen the charge current is reduced, but the cell is fully charged.
The display shows 2791mAh charged into the battery with 0.3A current.

Xtar%20VC2%201ohm%20(2xPA18650-31)

With two batteries and 1ohm in series with the power supply the charger has to limit the current even more. This shows that the two channels is not balanced, there is a significant difference in charge current (This cannot be seen in the chart). After 23½ hour the mAh count was 2088 and 2746. When the second cell finished (At 1500 in the chart), the first cell was charged at a much higher current.
The display shows 2846mAh and 2904mAh charged into the battery with 0.1A current.

Xtar%20VC2%20(2xPA18650-31)

With two batteries and a stable 5 volt power supply the charger will use about 500mA for each battery when charging.
The temperature raise is very limited.

Temp1383

M1: 24,8°C, M2: 24,7°C, M3: 27,4°C, HS1: 33,8°C
There is no doubt about where the heat generation is, but actual temperature shows that it is a insignificant heat generation.

Temp1382

M1: 24,7°C, M2: 24,3°C, M3: 28,0°C, HS1: 36,4°C

Startup

The charger needs about 6 seconds to start.

Startup%201ohm

But if the power is limited it will use some more time to adjust the charge current.

Charge

The scope traces looks very smooth, but that is only because I filters them. The charger is using a unfiltered 62kHz charge current.

Charge%201ohm%20(2xPA18650-31)

When current is reduced the charge will dynamically adjust the current.


Because the charger is supplied from usb power there will not be any safety issues with it, but be careful with the usb power adapter.



Conclusion

The actual charging is very good, but is a bit slow or very slow, depending on the usb supply used. The charger can draw a lot of current from the usb port, it will not be a problem with most usb chargers and power banks, but I wonder how a PC usb 2 ports will handle it.

The charger is a nice for car and travel usage and can also be used at home, but it is a good idea to find a power supply that can supply enough current and voltage for full charge speed. Remember to use a short cable between power supply and charger to avoid slow down due to losses in the cable.

I will call it a good charger.



Notes

The charger was supplied by XTAR for a review.

Here is an explanation on how I did the above charge curves: How do I test a charger