#cpm1

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BMS Basic integrated with Charger

Check the connection diagram for the integration of the BMS Basic and the DC Charger

More about BMS Basic  (based on the CPM Board)

Check the quality AC/DC chargers from MEAN-WELL.

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Connection of CPM with AMETEK Latching relay

This diagram shows the connection of the AMETEK Latching Relay with CPM Board.

The relay is controlled by the CPM Board contacts. However, because the AMETEK Latching relay needs a high current rated power supply for the coils, the latching relay itself needs to be connected by means of auxiliary relays.

The auxiliary relays are powered by 12V, the 12V voltage is taken from the 4th cell (12V DC) and must be separately protected by a DC breaker.

After the disconnection it is necessary to press the START button to resume the function. There is also the STOP button to make the manual disconnect.

Please note the fusing in this circuit:  two main fuses on the DC power line, one circuit breaker on the DC 12V line for the latching relay.

Study more links:

Get details about the CPM board

Check the latching relay from AMETEK

Details about the 2A circuit breaker

Download the diagram (PDF)

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GWL/Modular BMS Basic in Action! 

Check this Youtube video to see how to install the GWL/Modular BMS Basic into a 24V battery pack. https://www.youtube.com/watch?v=oPL4qKT4yyA

Check these main components used in the set-up: 

ELERIX 110 Ah https://shop.gwl.eu/LiFePO4-cells-3-2-V/ELERIX-Lithium-Cell-LiFePO4-3-2V-110Ah.html

ELERIX battery holder https://shop.gwl.eu/GWL-Modular/ELERIX-Holder-For-EX-L110-8-Cells-1.html

GWL/Modular BMS Basic https://shop.gwl.eu/en/By-Brand-Manufacturer/GWL-Power/ELERIX-Battery-management-system.html

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How to read the data from CPM?

Question: I have the CPM board and I wish to read the data from the board to make the analysis of the battery pack. How to do it?

If you have the CPM v 1.8 (sold for the last 1 year and more), you can connect the BCC board to the CPM to read the data and to transfer them via the computer network.

The BCC – Battery Communicator and Controller for CPM – is designed to enable the remote reading and writing of parameters to the CPM via a 10 Mbps LAN interface. It also has two programmable potential-free switching NO/NC relays max 30V / 1A AC/DC. It is configurable and controllable using any web browser on tablets, phones, or notebooks.

You can read the data from CPM just by adding the BCC module. 

If you wish to collect the data in an automated way, there is the software ELERIX-BCC-SW available at Github https://github.com/ELERIX/elerix-bcc-sw   

The software is provided with the source of the code, as an open-source project. So you can modify the software as needed.

If fact, the whole CPM project is designed as Open Source – check the links here: https://github.com/ELERIX/elerix-cpm-pcb --- HW design of the PCB https://github.com/ELERIX/elerix-cpm-fw --- the source code of the firmware

Just go on and study the all-available documentation for the CPM. It is ready and free for you. 

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The CPM – with the Latching Relays

The CPM board is designed to provide a direct support of the high-power control by means of the latching relays.

Check the drawing and see the function of the individual components as a part of the GWL/Modular solution.

The CPM board is the central component for the protection of the battery. Here a 8-cell 24V battery pack is used.

Three 12V latching relays work as the protection disconnection components. They are powered from the 4th cell at the 12V level.

The U-min  relay will disconnect the load when the voltage of any cell gets too low.

The U-max relay is designed to disconnect the charging if any cell gets too high.

The U-emergency disconnects the load or the charging in the case the voltage gets beyond the operational limit (both for low and high voltage).

The main fuse is for the power circuit.

The auxiliary fuse is for the control circuit.

To connect the battery, you can use the Battery Link connection sets.

The Reset button (optional) will reset the function of the CPM after the disconnection status has occurred.

This diagram is the part of the free customer support for your projects, If you wish to know more, please get the paid support for the answers to additional project-related questions.

Enjoy the GWL/Modular solution!

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Expand the Lifetime of your Battery Pack

The Cell Performance Monitor (ELERIX CPM) is an easy-to-use and effective solution for the protection of the LiFePO4 and LTO batteries from excessive discharge or overcharge.

https://shop.gwl.eu/en/By-Brand-Manufacturer/ELERIX/ELERIX-Cell-Performance-Monitor-plus-BCC-holder-KIT.html

The CPM project is an Open Source! The source code of ELERIX CPM board is available to download at Github web page.

https://github.com/ELERIX

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GWL/Modular CPM – Fully Public Project

From the very beginning the GWL/Modular component – ELERIX CPM was designed as a fully public project. All source documentation, the board schematics, the listing of all components, the source codes, etc. – all are available as public domain – free of charge.

Now, you can research and develop your own solution based on the CPM project.

Kindly note, that the project it provided as it is, with not additional support. GWL Team does not answer any questions, emails or inquiries related to the support of this public domain project. You ware welcome to post or share your questions as a part of the GITHUB documentation or inquiries and see if other users or project members may follow up and reply.

Enjoy the CPM!

Details about the CPM project at GITHUB:

https://github.com/ELERIX/elerix-cpm-fw - the repository with the source for the CPM firmware

https://github.com/ELERIX/elerix-cpm-fw/blob/main/cpm-documentation-eng.pdf - details about the IC2 documentation

https://github.com/ELERIX/elerix-cpm-pcb - the repository with the design files for the PCB

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AMETEK - high current DC latching contactors

GWL has introduced the high current rated DC latching contactors for 400A, 600A and 1200A rating.

Check more details here - AMETEK DC contactors

See the installation diagrams for the application with CPM1 and BMS123.

High current application with CPM1  (incl. START and STOP buttons)

High current application with BMS123   (incl. START and STOP buttons)

Stay in touch for more exciting news from GWL.