G.T.Power A8 Operating Manual
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G.T.Power A8 Operating Manual

Balance charger/discharger for nicd/nimh/lithium/pb batteries
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G.T POWER A8
BALANCE CHARGER/DISCHARGER
FOR NICD/NIMH/LITHIUM/PB BATTERIES
Operating Manual
Thank you for purchasing the G.T POWER A8 balance charger. This
is a rapid charge/discharger with built in balancer, computerised with
microprocessor and specialised operating software. Please read this
entire operating manual completely and attentively before using.

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Summary of Contents for G.T.Power A8

  • Page 1 BALANCE CHARGER/DISCHARGER FOR NICD/NIMH/LITHIUM/PB BATTERIES Operating Manual Thank you for purchasing the G.T POWER A8 balance charger. This is a rapid charge/discharger with built in balancer, computerised with microprocessor and specialised operating software. Please read this entire operating manual completely and attentively before using.

  • Page 2: Table Of Contents

    Contents Features Exterior of the unit Warnings and safety notes Program flow chart Initial Parameter set up (Users' set up) Lithium battery(Lilo/LiPo/LiFe)program Charging Lithium Battery Charging Lithium battery at balance mode 'FAST' charging Lithium battery 'STORAGE' control Lithium battery Discharging Lithium battery Voltage balancing and monitoring during the discharge NiMH/NiCd battery program Charging NiCd/NiMH battery...

  • Page 3: Features

    3,4,5,6 7,8 charge port, and external reverse connector. High-power and high-performance circuit A8 employs the circuit that has maximum output power of 150W. As a result it can charge or discharge up to 27 cells of NiCd/NiMH and 8 series of Lithium batteries with maximum current of 7.0A.
  • Page 4 PC based analysis using USB communication For technical expert, A8 offers PC based program can analyse the characteristic of the battery by USB port. It shows a graph of voltage, current, capacity and temperatu re curves. It also shows the individual voltage of each cell in the Lithium battery pack.

  • Page 5: Exterior Of The Unit

    To alter the operation the operation the value 2.1 Lithium balance charge program connection diagram WARNING It will damage the charger if you connect your battery with the A8 charger incorrectly. Please connect as shown in the following diagram carefully.

  • Page 6: Warnings And Safety Notes

    3. Warnings and safety notes • Never leave the charge unsupervised when it is connected to its power supply. If any malfunction is observed immediately terminate the process and refer to the operation manual. • Keep away the unit from dust, damp, rain, heat direct sunshine and vibration. Do not dorp it. •...
  • Page 7 • Did you set up adequate current for charging or discharging? • Lithium battery pack can be composed with parallel and series circuits mixed. You have to check the composition of the battery pack carefully before charging. • Are all connections firm and safe, or is there an intermittent contact at any point in the circuit? Charging •...

  • Page 8: Program Flow Chart

    4. Program flow chart Start PROGRAM SELECT LIXX CHARGE LIXX BALANCE Enter LIXX FAST CHG LIXX STORAGE LIXX BATT Batt type stop LIXX DISCHARGE PROGRAM SELECT NiMH CHARGE Start Enter NiMH DISCHARGE NiMH CYCLE NiMH BATT 'Aut' / 'Man' Batt type stop PROGRAM SELECT Start...

  • Page 9: Initial Parameter Set Up (Users' Set Up)

    5. Initial Parameter set up (Users' set up) A8 will be operated with the default value of the essential user settings when it is connected to a 12V batttery for the first time.The screen displays the following information in sequence and the user can change the value of parameter on each screen.
  • Page 10 This shows the trigger voltage for automatic charge termination of NiMH and NiCd battery. The effective value ranges from 5 to 20mV per cell .if the trigger voltage is set higher, there is a danger of overcharging the battery; if it is set lower, there is a possibility of premature termination.

  • Page 11: Lithium Battery(Lilo/Lipo/Life)Program

    This program sets the maximum charge capacity that will be supplied to the battery during charge. If the delta-pack voltage is not detected nor the safety timer expired by any reason, this feature will automatically stop the process at the selected capacity value. The beep sounds at every time pressing the buttons to confirm your action.

  • Page 12: Charging Lithium Battery At Balance Mode

    The left side of the first line shows the type of battery you select at the users setting. The value on the left side of second line sets a charge current and the value on the right side of second line sets the voltage of the battery pack. After setting the current and voltage press Start/Enter key for more than 3 seconds to start the process.

  • Page 13: Storage' Control Lithium Battery

    This screen shows the present situation during charge process. To stop charging press Batt type/Stop key once. 6.3 'FAST' charging Lithium battery The charging current is getting smaller as the process goes to the near end term of Lithium battery chaging. To finish charging process earlier, this program eliminate certain term of CV process.

  • Page 14: Discharging Lithium Battery

    6.5 Discharging Lithium battery The value of discharge current on the left side of screen may not exceed 1C for a maximum safety and the final voltage on the right should not be under the voltage level that is recommended by the battery manufacturer to avoid deep discharging.

  • Page 15: Nimh/Nicd Battery Program

    7. NiMH/NiCd battery program These programs are for charging or discharging NiMH (Nickel-Metal-Hydride) or NiCd (Nickel-Cadmium) battery commonly used for R/C model aplications. To alter the value at the display, press Start/Enter key to make it blink then change the value using INC or DEC key.The value will be stored by pressing Start/Enter key once.

  • Page 16: Charge-To-Discharge & Discharge-To-Charge Cycle Nimh/Nicd Battery

    7.3 Charge-to-discharge & discharge-to-charge cycle NiMH/NiCd battery Set the sequence on the left and the number of cycle on the right. You can use this function for balancing, refreshing and break-in the battery. To avoid rising temperture of the battery, there will a brief cool-off period that already fixed at 'User setting' after each charge and discharge process.

  • Page 17: Discharging Pb Battery

    The audible sound indicates you at the end of process. 9. Save Data Program A8 has a data storage and load program for your convenience. This feature can store up to 10 battery data by number that represent the individual specification of batteries you are using.

  • Page 18: Load Data Program

    Set up the charge current for manual charge mode, or the current limit for automatic charge mode. Each mode can be switched by pressing INC and DEC button at the same time when the current field is blinking. Setting up discharge current and final voltage. Setting up the sequence of charge and discharge, and the cycling number.

  • Page 19: Various Information During The Process

    11. Various information during the process You can inquire various information on LCD screen during charging or discharging process. When you press DEC button the charger shows the establishment of user settings. And also you can monitor the voltage of individual cell by pressing INC button when the individual connection cable is linked to the Lithium battery being processed.

  • Page 20: Warning And Error Messages

    12. Warning and error messages A8 incorporates a various functions of protective and monitoring the system to verify functions and the state of its electronics. In any case of occurring error, the screen displays the cause of error that is self- explanatory with audible sound.

  • Page 21: Specifications

    13. Specifications Operating voltage range: 10.0~18.0Volt Circuit power: max.150W for charging max.25W for discharging Charge current range: 0.1~7.0A Discharge current range: 0.1~5.0A Current drain for balancing Li-po: 300mAh/cell NiCd/ NiMH battery cell count: 1~27cells Lithium battery cell count: 1~8Series Pb battery voltage: 2 to 36V Weight: 700g...
  • Page 22 Note:...
  • Page 23 G.T POWER A8 BALANCE CHARGER/DISCHARGER FOR NICD/NIMH/LITHIUM/PB BATTERIES RoHs...

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