Page 66 - Battery Reference Book

Heating effects in batteries 1/51

0.4 0.4

X -
m
CA
1 2- Capacity (Ah)
- - 0.3
2 0.3
Y
W W
P m
m
.c 600 IT
P
._ t! .-
U 500 - U
P 0.2
p 0.2
.- ,Discharge current ._
-
a
L 100 c
L
2
U U
3
P 404 E 3
E
-
-
$ 300 9
; P ;
0.1
0.1
W 200 2 W
I 6 I
P
L J 1 1 1 1 1 1 I I I I I I 0 lilllllllllllll
0 4 8 12 16 20 24 28 0 4 8 12 16 20 24 28
Discharge time (rnin) Discharge time (min)
602 480 300 150 90 60 602 480 300 150 90 60
Discharge current (A) Discharge current (A)
Figure 1.40 Discharge of a2V lead-acid battery: heat production Figure 1.42 Discharge of a 2V lead-acid battery: heat production
per unit time, and discharge current as a function of discharge per unit time and Ah capacity as a function of discharge time
time
50
120
110
-
- 100 40
m
Discharge Discharge
5 90 net total net total
w
P Joule + AH Joule + AH L
m
80 f nn Y
-z
30 f
-
1
4- .-
VI
C
U
1
20 p
w
10
0
0 4 8 12 16 20 24 28 0 4 8 12 16 20 24 28
Discharge time (min) Discharge time (min)
Figure 1.41 Discharge of a 2V lead-acid battery: heat evolved Figure 1.43 Discharge of a 2V lead-acid battery: heat evolved
during whole discharge and Ah capacity as a function of discharge during whole discharge and energy density as a function of
time discharge time