User Manual – 16 V and 48 V Modules
– Doc. No. 1008491.13
© 2014 Maxwell Technologies, Inc.
Page 3
Electrical
3.2
WARNING
To avoid arcing the energy storage module should be in a
discharged state and the system power disconnected during
installation. The module is shipped discharged and with a shorting
wire. The shorting wire should be removed prior to electrical
connections.
To provide the lowest possible ESR the energy storage modules are
not fused. Care should be taken within the application to prevent
excessive current flow as required. Excessive current and/or duty
cycle will result in overheating the module which will cause
irreparable damage. Please consult the specific data sheet for each
module for current and duty cycle capabilities.
Module-to-module cabling should be sized for the applications peak and/or RMS current.
Undersized cables may cause excessive cable or interconnect temperature rise and system
electrical resistance. High resistance wiring/cables or module power connections will increase
terminal cell temperature and degrade module lifetime and long term performance. Reference
applicable wire sizing guides. Wire temperature must not exceed module temperature.
Note:
The module chassis should be grounded to the system chassis through any of the module
mounting holes. Refer to applicable ground wiring guides and standards for the application.
The anodized coating of the module on the ground connection surface should be removed to
ensure an optimal electrical contact. Apply a layer of high conductivity anti-oxidant joint compound
between the mating surfaces (IDEAL Noalox
®
Anti-Oxidant Compound or equivalent).
3.2.1
Output Terminal Posts
The output terminals of the module consist of internally threaded aluminum posts. They are
designed to connect directly to a ring lug or a bus bar. Maximum thread depth is 20 mm. If ring
terminals and lock washers in excess of 10 mm are to be used, a longer bolt must be selected. In
no instance should the total amount of thread engagement be less than 10 or greater than 20 mm.
The terminal contact surface should be cleaned with a light abrasive such as Scotch-Brite
TM
to
remove any oxidation. Apply a layer of high conductivity anti-oxidant joint compound between the
mating surfaces (IDEAL Noalox
®
Anti-Oxidant Compound or equivalent). The positive terminal is
threaded for M8 x 1.25 steel bolts. The negative terminal is threaded for M10 x 1.5 steel bolts.
Lock washers are required for long term, reliable connections. For additional performance, a
thread locking compound such as Loctite
®
425 may be used. However, care should be taken that
the thread locking compound does not come in contact with the electrical mating surfaces.
When tightening the terminal bolts, a torque of 20 N-m / 14.8 ft-lbs for the M8 and 30 N-m / 22.1
ft-lbs for the M10 bolts should be used. Do not exceed recommended torque.
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