High Temperature Operation; Thermal Capability And Delta Soc, Bol - NEC ALM 12V7 s-Series User Manual

®
ALM 12V7 s-Series User's Guide

High Temperature Operation

Both charge and discharge functions increase battery temperatures. High rate battery usage
causes the largest temperature increase. The ALM 12V7 s-Series battery's over temperature
protection (OTP) circuitry removes voltage from the terminals if the battery exceeds the
temperature limits. During high rate battery usage, the user must ensure that ambient
operating temperature combined with the charge or discharge rate does not exceed the
operational temperature limits.
ambient temperature relate to measured delta SOC before entering OTP state.
Under certain conditions, the ALM 12V7 s-Series terminals will exceed the 70°C touch
temperature limit as described in UL 1973. For operation beyond those terminal touch
temperature limits, not to exceed 90 °C, the ALM 12V7 s-Series batteries will require the
placement of guards to prevent accidental contact. NEC Energy Solutions recommends that
additional testing be conducted under specific use cases. The gauge of wire may be changed
depending on final temperature requirements and application.
Usage Rate:
Charge or
Discharge
Current (A)
5
10
23
30
45
a.
The values in this table show the battery's performance prior to engaging its protection circuitry.
b.
Testing was with 10 AWG cables at 25 °C and 60 °C
c.
100% = 5 Ah
d.
TT = Touch Temperature. The % delta SOC TT when Touch Temperature (TT) of the terminal exceeds 70 °C. A cover or other
protection is required to prevent incidental contact per UL1973.
e.
N/A = Not Applicable. The 12V7s battery is not capable of achieving this charge or discharge current.
NOTE
Cell life will be limited by exposure to high temperatures.
406014-02EN, Rev. 05
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Table 11 Thermal Capability and Delta SOC, BOL
b
25 °C Ambient
ALM 12V7s ALM 12V7s HP
% delta SOC % delta SOC
100
100
100
e
N/A
e
N/A
© 2016 NEC Energy Solutions, Inc. All rights reserved.
Chapter 5: Operation and System Design Considerations
Table 11 shows how the ALM 12V7 s-Series usage rate and
c
ALM 12V7s
% delta SOC
Internal Limit
100
100
100
17.9 (10.9 TT
100
100
a
b c
60 °C Ambient
ALM 12V7s HP
% delta SOC
Internal Limit
100
84.4 90.4
d
) 25.6 (7.0 TT
e
N/A 20 (5.0 TT
e
N/A 12 (2.5 TT
Page 31 of 49
100
d
)
d
)
d
)