C&D Technologies RS-2109 Liberty MSE / Liberty DCS - Manual (Page 32)

RS02109/0814/CD 32 www.cdtechno.com
Appendix D – Handling and Replacement of Individual Cells
Figure D1
A key design feature of the Liberty 2V battery is the provision for servicing
individual cells. With a minimum amount of handling and downtime, individual
cells can be changed in the field. In addition, disassembly and re-
assembly of the stack modules may accommodate installation of a new
battery if necessitated by a hard-to-access location. Once the battery string
has been removed from service, the technician must use properly insulated
tools and adhere to all appropriate battery safety methods.
1. Remove the connector covers from the subject module.
2. Disconnect the system ground connection.
3. For each connector attached to the cell, loosen (but do not remove) the
terminal bolts at either end.
4. While holding the connector in one hand, remove the terminal bolts
completely. Remove the connector and set aside. Repeat for other
connectors.
5. After performing the electrical preparation described above, the steps to
physically remove the cell or cells can be performed as follows.
6. Remove cell retaining bar, shown in Figure D1.
7. Attach the “cell puller tool”, part number RE05259. This tool, shown in
Figure D2, is available from your local C&D Technologies
Representative or directly through C&D Customer Service.
(
[email protected] )
8. Prepare for cell removal by moving a platform lift or equivalent lifting
apparatus in proximity to the bottom of the stack module from which
the cell is to be removed. Make sure all exposed metal on the platform
is insulated. Verify the capacity of the lifting apparatus is sufficient to
safely lift the cell. IMPORTANT: Before removing the cell, note the
orientation of the cell in the module, i.e., positive terminal up or down.
9. Pull the cell straight out onto the platform, shown in Figure D3.
10. Follow Steps 2, 3 and 4 in reverse order to physically install the
replacement cell or reinstall a new disassembled battery. Do not perform
the electrical connections at this time.
11. Note: There is also a connection drawing supplied with each battery that
will aid in cell orientation and installation. When all cells for a given
module have been installed, reinstall the cell-retaining bar.
12. Perform terminal and connector preparation.
13. Perform polarity check.
14. Reinstall connections.
15. Re-install connector covers.
16. Note: Liberty 2V cells should never be lifted by the terminals. Do not use
the cell puller tool as a lifting device
17. Never remove more than one cell per tier at a time.
Figure D2
Figure D3