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 |
| Input Power | 5266W |
| 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 |
| Database | MySQL Database |
| Data Output | EXCEL , TXT , Graph |
| Communication Interface | Ethernet Port |
| Per Unit Main Channels No. | 8 |
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