Project features
Project description and main features listing
Aim of this project is to build a battery charger and discharger capable to work also as a battery tester and characterizer, capable to measure the cell capacity, internal resistance, and several other parameters. For this purpose the "battery tester" function is performed when connected to a PC serial port using a set of programs, the charger/discharger function can be performed in stand-alone mode or under PC control.
The general instrument features are the following:
- Compact dimensions
- Very large transistors cooler for up to 300W power dissipation
- Three keys for settings, single LED for operation status
- Two independent charge/discharge profiles stored in internal EEPROM
- PC serial port connection with parameters: 9600,N,8,1
- Profile change when connected to a PC
- Low cost
Charger characteristics:
- Current setting and control from 0.1A to 5A
- Delta peak voltage for end of charge detection
- User configurable delta peak threshold setting
- Timeout period configurable
- Number of cells selectable modifying a single resistor
- Trickle charge after fast charge for no auto-discharge processes
Discharger characteristics:
- Current setting and control from 0.1A to 30A
- Cut-off cell voltage user adjustable
- Slow charge for extremely deep discharge process
The main characteristic of this project is the extreme flexibility of the internal architecture that can accomodate any charge or discharge sequence/profile under PC control. The set of programs already developed performs the following functions:
- Charge manager with graphic cell voltage visualization
- Discharge manager with graphic cell voltage visualization
- Stand alone charger/discharger parameter database manager
- Small display to follow the charge discharge process in stand alone
- Pack run time and mean voltage @30A
- Pack race simulator
The user, using the very exhaustive project documentation, can build a particular application for special purposes or can modify the microcontroller program for particular current or voltage control operations.
Comments ::
2007-11-23 :: balazs_orban
(hey, i want to ask what i need to modify in hardware to use as a high voltage charger as the Advanced charger HV, Thanks)2007-08-01 :: joseph gonzales
Good Day seven-segments community, im an enthusiast from the philippines and am glad to have discovered your website.
hope that I be accepted as a member of your ever growing family.
I wish you all good health and more power.2007-08-01 :: joseph gonzales
Good Day seven-segments community, im an enthusiast from the philippines and am glad to have discovered your website.
hope that I be accepted as a member of your ever growing family.
I wish you all good health and more power.
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