Neware Technology Limited
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4CH Neware Battery Testing System DCIR and Discharge Capacity Tester
A . Software Feature
1 , Windows-based software interface for easy operation .
2 , Uses standard SQL data - base management .
3 , 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 .
4 , 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 .
5 , Provide timely instructions , warnings, and intelligent support .
6 , Compliance CE Certified .
7 . Neware battery testers provide good accuracies both for voltage and current . This ensures you get the most reliable data from your tests .
8 . A measurement system can be accurate but not precise , precise but not accurate , neither , or both .
9 . 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 .
B . DCIR - Direct Current Internal Resistance
1 . 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 .
2 . The value of DCIR is not fixed , and varies depending on multiple factors , such as battery materials , electrolyte concentration , temperature , and depth of discharge .
3 . 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 .
4 . 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 .
5 . 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 | 6481W | |
| 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 | 150mV - 30V |
| 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 | |
| Protection | Software Protection | Power - down Data Protection |
| Off - line Testing Function | ||
| Setting Protection Condition,Setting Parameter - Low Voltage limit , Upper Voltage limit , Low Current limit , Upper Current limit , Delay Time | ||
| IP protection level | Protection level IP20 | |
| 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. | 4 | |
