1 general specifi cations, 2 battery internal resistance – Alpha Technologies AlphaCell SMU User Manual
Page 9
9
745-680-B9-001
3.0 Specifi cations, continued
3.1 General
Specifi cations
Model
Rated
Voltage
Rated Capacity (Ah)
Dimensions (in/mm)
Number
of Poles
Weight
(lb./Kg)
10hr. to
1.80Vpc (C
10
)
3hr. to
1.80Vpc (C
3
)
1hr. to
1.80Vpc (C
1
)
Length Width
Height
SMU 2-
200-FR
2
200
150
110
4.25/120
8/200
15/385
2
35/16
SMU 2-
300-FR
2
300
225
165
6/161
8/200
15/385
2
50/23
SMU 2-
400-FR
2
400
300
220
8/201
8/200
15/385
2
66/30
SMU2
-500-FR
2
500
375
275
9.5/242
8/200
15/385
2
84/38
SMU 2-
600-FR
2
600
450
330
11/283
8/200
15/385
4
99/45
SMU 2-
800-FR
2
800
600
440
7/183
9.5/244
24.5/629
4
136/62
SMU 2-
1000-FR
2
1000
750
550
8.5/218
9.5/244
24.5/629
4
167/76
SMU 2-
1500-FR
2
1500
1125
825
12/305
9.5/244
24.5/629
6
244/111
SMU 2-
2000-FR
2
2000
1500
1100
14.5/369
9/228
24.25/617
8
337/153
3.2 Battery Internal Resistance
Battery internal resistance is a nonlinear parameter that changes with changes in battery
temperature and discharge state. The internal resistance is lowest when the battery is fully
charged. At full charge and 25°C the internal resistances and short circuit currents are as
follows:
Table 3-1, General Specifi cations
Model
Internal Resistance (m Ω)
Short Circuit Current (A)
SMU 2-200-FR
0.514
3940
SMU 2-300-FR
0.363
5588
SMU 2-400-FR
0.297
6816
SMU2 -500-FR
0.218
9361
SMU 2-600-FR
0.175
11576
SMU 2-800-FR
0.223
9153
SMU 2-1000-FR
0.189
10804
SMU 2-1500-FR
0.152
13237
SMU 2-2000-FR
0.115
17391
Table 3-2, Internal Resistance and Short Circuit Current (25°C)
A short circuit will drop the battery voltage to zero and physically damage its internal components,
poles, and connectors.
CAUTION!