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Cellwatch Battery Monitoring

The Cellwatch Solution

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The Cellwatch Solution

The optimum Battery Monitoring solution for a modern UPS installation would be a monitoring system permanently cabled into a UPS or telecommunications battery, capable of measuring both voltage and internal resistance on a regular basis and storing that data for later analysis. The ability to signal, externally to the battery facility, that a problem either existed or was impending would also be a key feature of such a system.

To learn more about a typical battery configuration, click here

Cellwatch fulfills the requirement described above for a reliable, up-to-date fixed Battery Monitoring System with the following key features. 

  • Measures Voltage on each cell, either 6 or 24 times per day. The software records data for graphical presentation during THAT day as well as average data for historical analysis or trending. Also compares this data continuously with high and low alarm settings for alarm activation.
  • Measures Internal Resistance on each cell, either 2 or 4 times per day. The software records data for graphical presentation during THAT day as well as average data for historical analysis or trending. Also compares this data continuously with high and low alarm settings for alarm activation.
  • Measures the temperature of either the battery room ambient or a 'pilot' cell. Records this figure for graphing as well as comparison with high and low alarm setting for alarm activation.
  • Measures discharge current from a battery string and compares the data with a discharge alarm limit set in software. In the event of a discharge, rapidly records all cell voltage data as the battery discharges for later identification of weak cells under load.
  • Supplied with dedicated computer running Windows 98/ME/2000 software and CELLWATCH proprietary application for reporting, recording and data analysis.
  • The system is modular, so if your needs change, CELLWATCH can be reconfigured or expanded.
  • CELLWATCH is a Global product, with manufacturing both in the USA and in Europe.
  • Low voltage DC components. Measurement components never see greater than 48v nominal DC so battery connections are all low voltage. Electrical isolation is achieved by plastic fiber optic cable.

Cellwatch components

Cellwatch consists of 3 main building blocks. These are:

  • Battery Monitoring Unit (BMU/iBMU). Either; an IBM commercial grade notebook computer with its own battery back up, running Windows98/XP as well as CELLWATCH proprietary battery monitoring software. This is mounted behind glass, in a secure locked steel cabinet to avoid tampering, or an industrial PC mounted in a 19"rack mounted cabinet for remote access and notification.
  • Control Unit (CU). Interface from the computer's RS485 serial data bus to CELLWATCH's own proprietary fiber optic network. Also provides up to 4 current sensor and 4 temperature sensor inputs as well as 4 volts free alarm outputs.
  • Data Collection Module (DCM). A small electronic measurement instrument capable of measuring up to 12 volts DC nominal and 39 milli-ohm internal resistance on each of 4 cell (jar or mono-bloc) inputs. Hence one DCM is required for every set of 4,  2 volt to 12 volt (nominal) measurement point.

Other components of the CELLWATCH system include 1000 amp current sensing 'clamps', solid state temperature probes and Fiber Optic Network Cable.

To see photographs of typical installations, click here

CELLWATCH Software

Cellwatch software is an application written to run on Windows98/ME™ machines supplied as part of a CELLWATCH Battery Monitoring System. It has been carefully designed to be be both easy to use and intuitive, providing just the right amount of information for users who are too busy to read overwhelming reports.

Key features.

  • Informative entry screen, showing all cells on a battery or multiple batteries. "What you need to know"
  • Automatic battery testing under software control.
  • All alarm information readily visible on entry screen.
  • Capability to drill down into battery data, easily from the entry screen via familiar Windows functions.
  • Reports are all visual via graphing functions.
  • Reports available include:-
  • Today's V & Ri cell data, for a single cell.
  • String data, showing the last reading for the entire battery string.
  • Cell history showing a minimum of 120 days averaged data (if 120 days data is available) for that cell.     Other cells may be added for comparison.
  • Battery history, showing history for a particular year of service.
  • Discharge data, graphing the discharge characteristics of the entire battery under discharge following such an event. 
  • Programmable alarm limits for Voltage (V), Internal Resistance (Ri), Current, and Temperature

Additional features.

  • Log file creation showing start/stop and discharge events.
  • Automatic start, maximizing up-time in the event of computer power outage.
  • Facility Management Software interface with open protocols.
  • User programmable testing frequency.
  • Extensive diagnostic capability.

During a routine system voltage scan a fault has been detected. Jar 12 has fallen below 12.2 volts, triggering an alarm. CELLWATCH Battery Monitoring Systems are designed to be flexible, catering for battery configurations of multiple batteries in multiple strings. In addition each battery may be a different configuration of up to 4 strings, allowing for just about any variety of battery or UPS system that your imagination can create. For configuration detail visit our configuration guide.

The whole battery summary information is displayed on the entry screen by use of battery and string 'tabs'. Then cell depictions show the cells in more detail for the string chosen by use of the tabs. 

Simple pop-up windows appear as the cursor is moved across different areas of the entry screen, giving more detail data on the battery. Right clicking almost anywhere in the window gives instant access to a wide range of features, hardware detail, and graphing function are context sensitive to the cursor position.

In addition, standard drop down menus at the top of the screen provide access to all of CELLWATCH's  facilities. 

To view actual size screen shot; click it...

   Normal entry screen, with descriptions.     Cell 1 indicates a low voltage alarm.     String graph function.     Discharge graph showing best and worse performing cells.

To view the above images you should have your screen set to at least 800 x 600.

 

To see a 'live' Cellwatch system, click here



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