Maintenance - Maxwell 16 V Series User Manual

A fully discharged module may "bounce back" if it is stored without a
shorting wire connected to the + and – terminals. This bounce back can
be as much as 6V for the 48V module and is enough to cause
5.1 Discharge Procedure
To discharge an individual module:
1. Using a voltmeter, measure the voltage between the two power terminals.
2. If the voltage is above 2V, a power resistor (not supplied with the module) may be
connected between the terminals to discharge the module. Proper care needs to be taken
in the design and construction of such a resistor. Resistor value will change discharge time,
current, power and temperature.
Note: Customers may instead wish to consider using a DC electronic load tool to support
the safe/controlled discharge of individual modules prior to service (for example, the BK
Precision DC Electronic Load Model 8500 or a similar tool).
3. If the voltage is under 2V, connect the shorting wire provided by Maxwell to the + and –
connectors.
4. The module is now safe for handling. However, leave the shorting wire connected at all
times until the module is installed in the system and the power cables are connected.

6. Maintenance

Prior to removal from the system, cable removal, or any other handling ensure that the energy
storage module is completely discharged in a safe manner. The stored energy and the voltage
levels may be lethal if mishandling occurs. Maintenance should only be conducted by trained
personnel on discharged modules (see
6.1 Routine Maintenance
1. To improve power dissipation performance, clean the exterior surface of dirt/grime. Use a
cleaning cloth dampened with a water/soap solution. Do not use high-pressure sprays or
immersion. Keep excess amounts of water away from the PCBA cover and power terminals.
For outside use, do this every 6 months, or as needed. For inside use, you can do this
User Manual – 16 V and 48 V Modules – Doc. No. 1008491.13
© 2014 Maxwell Technologies, Inc.
WARNING
dangerous electrical shocks.
"Discharge Procedure" above).
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