4CH Neware Battery Testing System DCIR and Discharge Capacity Tester
1 . Software Feature
a , Windows-based software interface for easy operation .
b , Uses standard SQL data - base management .
c , Real - time monitoring windows and integrated graph / data windows can set various working modes for measuring capacity and cycle life of all types of rechargeable batteries , such as:constant current discharge , constant current charge , constant voltage charge , rest , as well as voltage , current , time , capability , negative voltage slope , and other limit conditions .
d , The user can define the curve by different types such as voltage - time curve , current - time curve , capacity - voltage curve ,
loop times - charge / discharge capacity curve , loop times - charge / discharge efficiency curve , etc . to make curves be compared both by visually and statistically .
e , Provide timely instructions , warnings, and intelligent support .
f , Compliance CE Certified .
g . Neware battery testers provide good accuracies both for voltage and current . This ensures you get the most reliable data from your tests .
h . A measurement system can be accurate but not precise , precise but not accurate , neither , or both .
i . Neware battery testers provide good prrecision meanwhile . To get an overall performance of a measurement system , Measurement system analysis MSA is usually introduced for the study .
2 . DCIR - Direct Current Internal Resistance
a . Direct current internal resistance of batteries is the r esistance of current flowing through the battery , with the standard unit of measurement called the ohm .
b . The value of DCIR is not fixed , and varies depending on multiple factors , such as battery materials , electrolyte concentration , temperature , and depth of discharge .
c . The variation of DCIR has a great influence on battery discharge performance , especially for high power batteries . In general , the better the battery , the lower the internal resistance .
d . Therefore , most battery manufacturers identify DCIR as a key indicator to evaluate battery quality . The method of DCIR measurement is to inject high current into the anodeand cathode of the battery in a short period , and then record the changes of battery voltage and charge / discharge current .
e . To calculate DCIR by Ohm Law , voltage variation is divided by current variation .
|resolution||AD 16bit , DA 16bit|
|Input Resistance||More than 1MΩ|
|Channel Features||Constant Current Source and Constant Voltage Source with Independent pairs of Closed - loop Structure|
|Channel Control Mode||Independent Control|
|Voltage||Per Channel Voltage Range||250mV - 50V|
|Discharge Min Voltage||3V|
|Accuracy||0.1 percent of FS|
|Stability||0.1 percent of FS|
|Time||Current Response Time||20ms|
|Charge||Charge Mode||CCCharge , CVCharge , CCCVCharge , CPCharge|
|End Conditon||Voltage , Current , Relative Time , Capacity , -deltaV|
|Discharge||Discharge Mode||CCD , CPD , CRD|
|End Condition||Voltage , Current , Relative Time , Capacity|
|Cycle||Loop Measure Range||65535 times|
|Max Steps Per Loop||254|
|Nested Loop||Nested loop Function , Max Support 3 Layers|
|Voltage and Current Testing Sample||4 - wire connecting|
|Noise||Less than 85dB|
|Data Output||EXCEL , TXT , Graph|
|Communication Interface||Ethernet Port|
|Per Unit Main Channels No.||8|