Datasheet
22
Valve Regulated Lead-Acid Batteries
23
Valve Regulated Lead-Acid Batteries
4 | Charging Methods
c) Charging temperature
(1) Charge the battery at an ambient temperature in the
range from 0°C to 40°C.
(2) Optimum temperature range for charging is 5°C to 35°C.
(3) Charging at 0°C or below and 40°C or higher is not recom-
mended: at low temperatures, the battery may not be charged
adequately; at high temperatures, the battery may become
deformed.
(4) For temperature compensation values, see a).
d) Reverse charging
Never charge the battery in reverse, as it may cause leakage,
heating or bursting of the battery.
e) Overcharging
Overcharge is an additional charge after the battery is fully
charged. Continued overcharging shortens the battery life.
Select a charge method which is specified or approved for
each application.
f) Charging before use
Recharge the battery before use to compensate for capa-
city loss due to self-discharge during storage. (See “Refresh
charge” (auxiliary charge) table on page 15.)
Characteristics of constant voltage chargers
Even with the same voltage set-up, charging time varies with output V-I characteristics.
Example of constant voltage circuit
A.C.
100V
TR
15.5V
0.8A
D
2A
D
2A
C
50V
470uF
D
R
33K
1/4W
Q
LED
R
1.2K
1/4W
R
5.6K
1/4W
D
1.2V
R56
1/4W
Q
C
50V
10,000PF
R56
1/4W
Q
1.2
R1/4W
ZD
5V
500W
Q
R
1K
1/4W
VR
500
0.1W
C
25V
47uF
R
1K
1/4W
R
R
5.6K
1/4W
Q
D
1A
200V
2.2K
1/4W
Constant voltage charger circuitry (Concept diagram)
Time
I
V
V
V
I
Time
I
V
Time
Time
V
I
I
I
I
I
V
VV
Output V-I characteristics of the constant voltage charger vs. Charging pattern of the battery
4 | Charging Methods
Precautions
1) When adopting charging methods and charging con-
ditions other than those described in the specifications or
the brochures, thoroughly check charging/discharging
characteristics and life characteristics of the battery in
advance. Selection of appropriate methods and conditions
of charging is essential for safe use of the battery and for
fully utilizing its discharge characteristics.
2) In cyclic use of the battery, use a charger equipped with
a charging timer or a charger in which charging time or
charge amount is controlled by other means; otherwise, it
will be difficult to judge the completion of the charge. Use of
a charger as described above is recommended to prevent
undercharge or overcharge which may cause deterioration
of the battery characteristics.
3) Continue charging the battery for the specified time or
until the charge completion lamp, if equipped, indicates
completion of charging. Interruption of charging may cause
a shortening of service life.
4) Do not recharge the fully charged battery repeatedly, as
overcharge may accelerate deterioration of the battery.
5) In cyclic use of the battery, do not continue charging for
24 hours or longer, as it may accelerate deterioration of the
battery.
6) In cyclic service of the battery, avoid charging two or more
batteries connected in parallel simultaneously: imbalance of
charge/discharge amount among the batteries may shorten
the life of batteries.
5 | Terminal Data
1. Bold and Nut type
F1
F2
(3)
B2
E3
E2
A
(2)(1)
A
B1
E1
E3
T-shape terminal (M10) L-shape terminal (M5, M6, M8)
2. Faston tab type
Unit: inch (mm)
3. Threaded post type
0.187 (4.75)
0.25 (6.35)
0.126
(3.2)
0.031
(0.8)
(0.25)
6.35
0.178
(4.52)
0.031
(0.8)
M5-bolt
P= 0.031 (0.8)
0.386
(9.8)
Faston tab type 187 M5 threaded post typeFaston tab type 250
Type of
Terminal
Terminal
thickness
A (1)
Height from
battery case top
Terminal
width
Hole
diameter
Hole Position Bolt
B1 (1) B2 (2)
Distance
from top:
E1 (1)
Distance
from top:
E2 (2)
Distance from
terminal top:
E3 (2)
Diameter
F1 (3)
Pitch
Length
F2 (3)
M5 bolt and nut 5.0 ± 0.3 1.0 – 11 ± 0.4 5.5 ± 0.3 6.5 – 5.5 ± 0.3 M5 0 15 ± 1.0
M6 bolt and nut 8.0 ± 0.5 5.0 16.5 ± 1.5 16 ± 0.8 6.5 ± 0.4 – 9 ± 1.0 7.5 ± 0.4 M6 0 20 ± 1.0
M8 bolt and nut 8.0 ± 0.5 – 24 ± 1.5 – 6.5 ± 0.4 – 14 ± 1.0 10 ± 0.4 M8 0 20 ± 1.0