La description
SANDI high power battery charger is developed s pecially by Zhejiang Sandi Electric Co., Ltée. for DC battery sy stem ch arging station. With three phase non neutral conductor AC input, it has the advantages of high efficiency, high power density and low harmonic.
Functional details:
1. Hot plug
Plug technology is applied to the charging module to provide convenience for installation and maintenance. The access of the charging module to the system shall not disturb the output voltage of the system.
2. Advanced current sharing technology
Under constant voltage working mode, the charging modules can share current automatically within 10S, with degree of unbalance less than ±0.5A.
3. Control of input limited power
Refer to Fig. 1-8 for the relation between the output power and input voltage of the charging module. When the input voltage is within 350Vac ~ 450Vac (return difference is less than 5V), the charger can output the maximum power of 150KW; when the input voltage is within 350Vac ~450Vac, the charger can still work normally under limited power mode.
4. Control of output constant power
When there is a rated input voltage, the output power of the charger is 150KW. Refer to Fig. 1-9 for the relation between the output voltage and the output current of the module.
5. Temperature limited power
Under 45°C ambient temperature, the charger can output full power of 150kW and the max output current is 375A;
Over 55°C ambient temperature, the module shall be used by derating with the power Linearly.
Under 65°C ambient temperature, the allowable output power of the module is 100KW.
Under 75°C ambient temperature, the output power of the charger is reduced to 0.
| Category | Nom | Parameter |
| Environmental conditions | Operation temperature | -40°C ~ +75°C, derating is require when the temperature is above 55°C. |
| Storage temperature | -40°C ~ +70°C | |
| Relative humidity | ≤95%RH, without condensation | |
| Cooling mode | Forced air cooling | |
| Altitude | 2,000 m a.s.l., derating is require when the altitude is above 2,000 m a.s.l. | |
| Atmospheric pressure | 79 kPa ~ 106 kPa | |
| AC input | Input system | Three phases + PE |
| Tension nominale | 380 Vac +/-15% | |
| Rated frequency | 50Hz/60Hz | |
| DC output | Voltage range | 50~750V |
| Courant nominal | 300UN (Full power 150KW) | |
| Steady voltage precision | <±0.5% | |
| Steady current precision | ≤±1% (rated range of 20% ~ 100% for output load) | |
| Load regulation rate | ≤±0.5% | |
| Grid regulation rate | ≤±0.1% (testing range is 350V ~ 450V) | |
| Startup overshoot | ≤±3% | |
| Peak-to-peak value noise | ≤1% (50~750V, 0~20MHz) | |
| Power factor and THD | Power factor | ≥0.95 Full-load output power of @20%~50% |
| ≥0.98 Full-load output power of @50%~100% | ||
| ≥0.99 Full-load output power, input nominal voltage and frequency of @100% | ||
| THD | ≤5% Full-load output power of @50%~100% | |
| Efficiency | Under Rated input voltage | ≥95.2%,@750V,50%~100% |
| EMC | Emission | ClassA , Meet the requiremnt of NB/T 33001-1-2010,NB/T 33008-1-2013 |
| Immunity | C lassA , Meet the requiremnt of NB/T 33001-1-2010,NB/T 33008-1-2013 | |
| Current sharing | In case of load of 10%~100%, the module current sharing error ≤ rated output current of ±5%. | |
| Noise | ≤65dB(1m away, | |
| Startup duration (select the startup mode through the monitoring module) | Normal startup mode: the time delay from AC power-on to module output is ≤ 8s. | |
| Output delayed startup: The startup duration can be set through the monitoring module, with default output startup duration of 3~8s. | ||
| Earthing resistance | Earthing resistance ≤ 0.1Ω, bearable current ≥ 25A | |
| Surge protection | Meets IEEE C62 41-1991 Class B3 rating, 6kV/3kA (1.2/50μs impulse voltage and 8/20μs inrush current mixed wave) | |
| Insulation resistance | The insulation resistance of DC part and AC part to housing and the AC part to the DC part shall be ≥ 10MΩ. | |
| Insulation strength | AC input terminal to the housing 3535V DC voltage 20S clock, no breakdown, no arcing phenomenon, steady state leakage current is less than 1mA; AC input terminal to DC output terminal 3535V DC voltage 20S clock, no breakdown, no arcing phenomenon, steady-state leakage current is less than 1mA; DC output terminal to the housing 3535V DC voltage 20S clock, no breakdown, no arcing phenomenon, steady state leakage current is less than 1mA; |
