LC-WTP127R2 For pitch backup systems in wind turbines Expected life: 10 years at 20℃, 6 years at 25℃ (based on a weekly discharge cycle of max 15 seconds) ■Dimensions(mm) Terminal type 4.5 6.35 ※Contents indicated (including the recycle marking,etc) are subject to change without notice. Battery case resin: Flame-retardant (UL94V-0) ■Duration of discharge vs. discharge current ■Specification 12V 7.2Ah 151 mm 64.5 mm 94 mm 100 mm 2.50 kg Faston 250M 30 20 Capacity (25 ℃) 7.2Ah 6.5Ah 5.8Ah 4.9Ah Internal Resistance (25 ℃) Fully charged battery 21 mΩ 40 ℃ 25 ℃ 0℃ -15 ℃ After 3 months After 6 months After 12 months 102% 100% 85% 65% 91% 82% 64% Temperature Dependency of Capacity (20 hour rate) Self Discharge (25 ℃) (hour) 5 25℃ 3 60 0℃ 30 (minute) ■Characteristics 20 hour rate 10 hour rate 3 hour rate 1 hour rate 40℃ 10 Duration of discharge Nominal Voltage Rated Capacity(20HR) Length Width Dimensions Height Total height Approx. Mass Terminal 10 -15℃ 5 3 1 0.1 3 1 0.3 10 30 Discharge current(A) ■Large current discharge characteristics(25℃) Peak current(A for milliseconds) Discharge current(A) Discharge time(sec) 160 144 3 150 135 6 140 126 10 130 117 15 120 108 20 112 101 25 105 95 30 94 85 40 86 78 50 80 72 60 75 68 70 Peak current(A for milliseconds) Discharge current(A) Discharge time(sec) 70 63 80 66 60 90 62 56 100 59 53 110 55 50 120 52 47 130 49 44 140 46 42 150 44 40 160 42 38 170 40 36 180 The cut off voltage should be more than 8.0V.Battery should be charged after each discharge. ■Charging method **Control voltage: 13.6V~13.8V at 20℃~25℃ with temperature compensation, Initial current: 1.08A or smaller **Please consult us for the right control voltage if the ambient temperature is different. ■Operating temperature range *Storage -40℃~ 50℃ Charge -20℃~ 50℃ Discharge -20℃~ 50℃ * For storage, please ensure that battery is fully charged. 1/2 100 ■Influence of Temperature on Trickle life ■Residual capacity test result Capacity Retention Ratio (%) Service Life (Years) 100 ①Charging Voltage 2.275V/Cell 10 1 120 100 80 40℃ (104℉) 40 30℃ (86℉) 25℃ (77℉) 20 0.1 0 0 10 20 30 40 Temperature (℃) 50 60 0 ■Constant-voltage constant-current charge characteristics for Trickle use 160 60 8.0 ② Charge Charge Voltage： 13.7V(2.28V/Cell) 40 Charge Current： 0.15CA ③ Temperature： 25℃ (77℉ ) 20 12.0 10.0 ① Discharge — — 100% (0.05CA*20H) — — 50% (0.05CA*10H) 80 6 8 10 12 14 16 Storage Period (Month) 18 6.0 4.0 20 120 100 0.05CA 0.10CA 80 0.25CA 0.50CA 60 1.00CA 2.00CA 3.00CA Capacity(%) 0.1 Charge Quan tity (to-D ischarge Quantity 100 4 14.0 Battery Voltage(V) 0.2 120 2 ■Discharge capacity by temperature and by discharge current 16.0 B attery Voltage 140 Charge Quantity(%) 0.3 Charge Current(CA) 5℃ (41℉) 60 40 2.0 20 0.0 0 C harge Cu rren t 0 0 0 4 8 12 16 20 Char ge Tim e (H) 24 -15 0 15 30 Battery temperature(℃) 45 ■Discharge characteristics(25℃) 20.0 Terminal voltage(V) 15.0 10.0 1.80A 7.20A 21.6A 0.360A 5.0 0.0 0 1 2 4 6 8 10 20 40 60 2 (minute) 4 6 8 10 20 40 (hour) Duration of discharge ！ Caution Due to the potential energy stored in the batteries, Please read《Precautions for handling the Rechargeable Valve Regulated Lead Acid Batteries》 before using batteries. If improper handling or use of the batteries without understanding《Precautions for handl Panasonic Storage Battery (Shenyang) Co., Ltd NO. 51 Kunminghu Street, Shenyang Economic & Technical Development Zone,110141 China Tel: 86 24 25818921 Fax: 86 24 62786318 Website: 2010.03 http://www.panasonicbattery.cn 2/2