MQC02052

Electrical Accessory Products Temperature Sensors Temperature Sensors Description Power-One offers a wide range of battery charger systems for power requirements of 50 Watt up to 8000 Watt. For this purpose Power-One supplies temperature sensors and adapted power supplies. The batteries (lead acid batteries) are charged according to the battery temperature and the ambient temerature. If the battery is fully charged it is maintained at the float charge voltage which represents the optimum point for maximum available energy in case of Cell voltage [V] 2.45 2.40 2.35 2.30 2.25 2.20 2.15 2.10 -20 [°C] 50 need and optimum life expectancy of the battery. The type of sensor needed is defined mainly by three parameters: The nominal battery voltage (e.g. 24 V or 48 V), the temperature coefficient of the battery (e.g. –3.0 mV/K/cell) and the nominal floating charge voltage per cell of the battery at 20 °C (e.g. 2.27 V/cell). The latter two are defined in the specifications of the battery given by the respective battery manufacturer. 06139 -10 0 10 20 30 40 UC = 2.27 V, –3 mV/K UC = 2.23 V, –3 mV/K UC = 2.27 V, –3.5 mV/K UC = 2.23 V, –3.5 mV/K Fig. 1 Float charge voltage versus temperature for defined temperature coefficient. 03099 Vi+ Vi– Power supply Vo+ Vo– R /UCR input Load Temperature sensor Fig. 2 Functional description Table of Contents Description ....................................................................... 1 Temperature Sensors for T and U units ........................... 1 Mechanical Dimensions ................................................... 2 Edition 5/06.2001 + – ϑ Battery Page Page Temperature Sensors for M, H, S, K, KP, PSx, LW, OK Units .................................. 3 Mechanical Dimensions ................................................... 3 Fail Safe Operation .......................................................... 4 1/4 Electrical Accessory Products Temperature Sensors Temperature Sensors for T and U units T and U units feature a cell voltage selector switch (feature Z) to set the required floating charge voltage at 20 °C directly at the unit. If this Z switch is used the 2.23 V/cell sensor types should be selected in any case as a basis and the selection criteria are only the temperature coefficient of the battery and the nominal battery voltage. If for example a 24 V battery is used which has a cell voltage of 2.27 V/cell and a temperature coefficient of –3.5 mV/K/cell, the sensor type is S24-2.23-35-02. The setting on the Z switch of the T or U unit should be 2.27. For units without the Z selector switch a sensor according to both criteria should be selected. In our example it would be S24-2.27-35-02. For further details please consult the T or U datasheet. Table 1: Type survey T sensors Nominal battery voltage [V] 24 24 24 36 36 36 48 48 48 48 48 48 48 Sensor type S24-2.23-30-02 S24-2.23-35-02 S24-2.23-45-02 S36-2.23-30-02 S36-2.23-35-02 S36-2.27-35-02 S48-2.23-30-02 S48-2.23-35-02 S48-2.23-40-02 S48-2.23-45-02 S48-2.27-30-02 S48-2.27-35-02 S48-2.27-45-02 Part no. MQC02052 MQC02053 MQC02051 MQC02081 MQC02082 MQC02083 MQC02008 MQC02009 MQC02013 MQC02012 MQC02010 MQC02007 MQC02006 Cell voltage [mV] 2.23 2.23 2.23 2.23 2.23 2.27 2.23 2.23 2.23 2.23 2.27 2.27 2.27 Temp. coefficient [mV/K/cell] –3.0 –3.5 –4.5 –3.0 –3.5 –3.5 –3.0 –3.5 –4.0 –4.5 –3.0 –3.5 –4.5 Cable length [m] 2 2 2 2 2 2 2 2 2 2 2 2 2 Other types for different cell voltages or temperature coefficients are available upon request. 05064 05148 + — Sensor wires Sensor Temperature sensor cable U Ucr Vo+ + — Vo– Battery 2 white 1 brown 9 green + – Sensor wires Sensor Temperature sensor cable i/Ucr Vo+ Vo— 28 white 12 brown 22 green + – Battery Fig. 3: Connection to the T unit. Fig. 4: Connection to the U unit. Mechanical Dimensions All dimensions in mm, tolerances ±0.3 mm unless otherwise specified. 15 25 ± 0.2 12 09044 European Projection l l: 2 m standard length other cable lengths on request ≤60 adhesive tape Fig. 5 T and U temperature sensor with mounting fixture. Edition 5/06.2001 2/4 14.5 Electrical Temperature Sensors for M, H, S, K, KP, PSx, W, OK Units Accessory Products Temperature Sensors With M, H, S, K, KP, PSx, W and OK units the sensor signal acts on the R pin to adjust the output voltage relative to the battery temperature and the ambient temperature. As these units in contrast to the T and U units do not feature a cell voltage selector switch (Z switch) the sensor selection criteria is in every case both the cell voltage and the temperature coefficient (beside the nominal battery voltage). If the application uses for example a 48 V battery with a cell voltage of 2.23 V/cell and a temperature coefficient of –3.0mV/K/cell the sensor S-KSMH48-2.23-30-2 should be selected. Table 2: Type survey S-KSMH sensors Nominal battery voltage [V] 12 24 24 48 48 Sensor type S-KSMH12-2.27-30-2 S-KSMH24-2.27-35-2 S-KSMH24-2.27-30-2 S-KSMH48-2.27-35-2 S-KSMH48-2-27-30-2 Part no. MQC03005 MQC03002 MQC03004 MQC03001 MQC03003 Cell voltage [mV] 2.27 2.27 2.27 2.27 2.27 Temp. coefficient [mV/K/cell] -3.0 -3.5 -3.0 -3.5 -3.0 Cable length [m] 2 2 2 2 2 Other types for different cell voltages or temperature coefficients are available upon request. 05163 + – Sensor wires Sensor Temperature sensor cable R Vo+ Vo– white brown green + – Battery Fig. 6 Connection to a M, H, S, K, KP, LW or OK unit. Mechanical Dimensions All dimensions in mm, tolerances ±0.3 mm unless otherwise specified. European Projection S90051 55 (2.17") 26 (1.02") Fig. 7 S-KSMH temperature sensor. Edition 5/06.2001 9.8 (0.4") 3/4 Electrical Fail Safe Operation Accessory Products Table 3: Nominal battery voltage [V] 12 24 36 48 60 Temperature Sensors To prevent overcharging of the battery but still maintain a minimum charging in case of interruption of the sensor signal cable to the power supply, Power-One has designed units with a special nominal output voltage setting. These units differ from the respective standard units described in the datasheet in the nominal output voltage and output current settings. Without the sensor connected to the R pin the output voltage will be higher than the nominal battery voltage to avoid a discharging of the battery but still lower than the theoretically needed float charge voltage. As soon as the sensor is connected to the R pin the output voltage will be set to the correct value. Output voltage setting (20 °C) [V] 12.84 25.68 38.52 51.36 64.2 Tabel 4: Special units for battery charging Ubatt [V] 12 24 36 48 60 Po 50 Watt LM 1781-7R LM 1782-7R LM 1783-7R LM 1784-7R LM 1785-7R Po 70 Watt LH 1781-2R LH 1782-2R LH 1783-2R LH 1784-2R LH 1785-2R Po 100 Watt LS 4740-7R LS 5740-7R Po 150 Watt LK 4740-7R LK 5740-7R Po 250 Watt LKP 5740-6R LS 5740-7R LK 5740-7R LKP 5740-6R Higher power requirements can be covered by paralleling of these units. Complete microprocessor controlled systems of un-interuptable power suplies (UPS) are realized by our Applications Center. Please consult your local Power-One representant. Edition 5/06.2001 4/4