G.T.Power A620 Operating Manual
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G.T.Power A620 Operating Manual

Microprocessor controlled high-performance rapid charger/discharger with integrated balancer / temperature sensor
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Microprocessor controlled high-performance rapid charger/discharger
with integrated balancer / temperature sensor
G.T. POWER A620
operating manual
- 1 -

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Summary of Contents for G.T.Power A620

  • Page 1 Microprocessor controlled high-performance rapid charger/discharger with integrated balancer / temperature sensor G.T. POWER A620 operating manual - 1 -...

  • Page 2: Table Of Contents

    Contents Specifications Special features Exterior of the unit Warnings and safety notes Program flow chart Initial Parameter 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...
  • Page 3 Charging NiCd/NiMH battery Discharging NiCd/NiMH battery Charge-to-discharge & discharge-to-charge cycle NiMH/NiCd battery Pb( lead-sulphuric acid) battery program Charging Pb battery Discharging Pb battery 10. Save Data Program 11. Load Data Program 13. Warning and error messages 14. Warranty and service...

  • Page 4: Specifications

    1. Specifications Input voltage range: 11.0 – 18.0Volt Charge current range: 0.1 – 20.0A Discharge current range: 0.1 – 5.0A Maximum charge power capacity: 400W @ input voltage >15V Maximum discharge power capacity: Current drain for balancing Li-po: 200mAh/cell Lithium (LiPo/LiIo/LiFe) battery cell count: 1 –...

  • Page 5: Special Features

    2. Special features Operating software Every operating program in the unit is controlled with mutual links and communications to prevent every possible error, so it introduces the maximum safety, such as input voltage warning, reverse polarity protection and Lithium cell-count input error warning. High-power and high-performance circuit It employs the circuit that has maximum output power of 400Watts.
  • Page 6 Auto-charge current limit: When charging NiCd or NiMH at 'AUTO' current mode, you can set the upper limit of change current to avoid from high current charging. This is very useful when charging the low impedance and small capacity NiMH battery in 'AUTO' mode. Capacity limit: The changing capacity always calculated by multiple of the charging current and time.

  • Page 7: Exterior Of The Unit

    3. Exterior of the unit Cooling fan Cooling fan Output port Balance socket Temperature sensor port 4. 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.
  • Page 8 voltage level:1.2V/cell allowable fast charge current:1C~2C depends on the performance of cell NiCd/NiMH discharge voltage cut off level :0.85V/cell(NiCd), 1.0V/cell(NiMH) voltage level:3.6V/cell max.charge voltage:4.1V/cell Lilo allowable fast charge current: 1C or less min.discharge voltage cut off level:2.5V/cell or higher voltage level:3.7V/cell LiPo max.charge voltage:4.2V/cell discharge voltage cut off level:3.0V/cell or higher...
  • Page 9 - Batteries that require a different charge technique from NiCd, NiMH, Lilo, LiPo, LiFe or Pb. - Faulty or damaged battery. - Battery fitted with an integral charge circuit or a protection circuit. - Batteries installed in a device, or which are electrically linked to other components. - Batteries that are not expressly stated by the manufacturer to be suitable for the currents the charger delivers during the charge process.
  • Page 10 Discharge • The typical purpose of discharge is to determine the residual capacity of the battery, or to lower the voltage of battery to a defined level. When you discharge the battery you also have to pay attention on the process same as charging. To avoid the battery becoming deep-discharged, set the final discharge voltage correctly.

  • Page 11: Program Flow Chart

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

  • Page 12: Initial Parameter Set Up

    6. Initial parameter set up When you are willing to alter the parameter value in the program, press Start/Enter key to make it blink then change the value with INC or DEC key. The value will be stored by pressing Start/Enter key once. This informs you of its designation.
  • Page 13 An optional feature using temperature probe contacting the surface of battery, the temperature cut-off can be on or off. If it is on, set the maximum temperature at which the charger should allow battery to reach during charge, Once a battery reaches this temperature during charge, the process will be terminated to protect the battery.

  • Page 14: Lithium Battery(Lilo/Lipo/Life)Program

    This program monitors the voltage of input battery. If the voltage drops below the value you set the operation forcibly terminated to protect the input battery. You can adjust the brightness of LCD screen at the charger. 7. Lithium battery(Lilo/LiPo/LiFe)program These programs are only suitable for charging and discharging Lithium batteries with a nominal voltage of 3.3V, 3.6V and 3.7V per cell.

  • Page 15: Charging Lithium Battery At Balance Mode

    This shows the number of cells you set up and the processor detects. ' R:' shows the number of cells found by the charger and ' S:' is the number of cells selected by you at the previous screen. If both numbers are identical you can start charging by press Start/Enter button. If not, press Batt Type/Stop button to go back to previous screen.

  • Page 16: Fast' Charging Lithium Battery

    The screen shows the present situation during charge process. To stop charging press Batt type/ Stop key once. 7.3 '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 17: Discharging Lithium Battery

    You can set up the current and the voltage of the battery pack to be charged. The current will be used for charge or discharge the battery to reach the ' storage ' level of voltage. The screen shows the present situation during charge process. To stop charging press Batt type/ Stop key once.

  • Page 18: Nimh/Nicd Battery Program

    The processor found that the voltage of one of the cell in the Lithium battery pack is too low. In this case, the 4th cell is bad. If there happens the connection-break of th cable or plug, the voltage value may show zero. 8.

  • Page 19: Discharging Nicd/Nimh Battery

    8.2 Discharging NiCd/NiMH battery Set discharge current on the left and final voltage on the right. The discharge current ranges from 0.1 to 5.0A and the final voltage ranges from 0.1 to 25.0V). To start the process, press Start /Enter key more than 3 seconds. The screen displays the current state of discharge.

  • Page 20: Pb( Lead-Sulphuric Acid) Battery Program

    9. Pb( lead-sulphuric acid) battery program This is programmed for charging Pb( lead-sulphuric acid) battery with nominal voltage from 2 to 20V. Pb batteries are totally different from NiCd or NiMH batteries. They can only deliver relatievely lower current compare to their capacity, and similar restrictions definitely apply to charge.
  • Page 21 The screen displays the current state of discharge. You can alter the discharge current by pressing Start/Enter key during the process. Once you change the current value, store it by pressing Start/Enter button again. To stop discharging press Batt Type/Stop key once. The audible sound indicates you at the end of process.

  • Page 22: Save Data Program

    11. Save Data Program It 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. They can be called back for the process of charging or discharging without setting up the program again.
  • Page 23 Setting up the sequence of charge and discharge, and the cycling number. Saving the data. 12. Load Data Program This program calls back the data that was stored at 'Save Data' program. To load the data, press Start/Enter key once to blink the data number field and select the number using INC or DEC key then press Start /Enter key for more than 3 seconds.
  • Page 24 13. 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 25: Warning And Error Messages

    Present input voltage. The battery is connected with each port through cable; you can check voltage of each cell in the battery pack. When the cable is connected with the ports on the charger, the program will display voltage of up to 6 batteries. 14.
  • Page 26 The voltage of the battery pack has been selected incorrectly! The charger has malfunctioned for some reason. Seek professional advice. The voltage is lower than which is set. Please check the number of cells in the battery pack. The voltage is higher than which is set. Please check the number of cells in the battery pack. Voltage of one cell in the battery pack is too low, please check the voltage of each cell.

  • Page 27: Warranty And Service

    15. Warranty and service We warrant this product for a period of one year(12 months) from the date of purchase. The guarantee applies only to such material or operational defects, which are present at the time of purchasing the product. During that period, we will replace without service charge any product deemed defective due to those causes.
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  • Page 29 RoHs...

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