Technical Report TR

Transcription

1 Technical Report TR

2 Relationship Comtest Distributor in Africa Founded in 2005 and voted best distributor by Fluke and since then have added other manufacturers. Midtronics Manufacturer Corporate offices in USA, Netherlands and China

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4 State-of-the-art technology Work with the top Telcos world-wide Over 25,000 testers sold (70% share) Over 100,000 batteries monitored world wide

5 Telecommunications Electric Power/Utlility DataCenters Battery Suppliers UPS Suppliers

6 Electric Power Research Institute (EPRI) TR Summary Internal ohmic measurements State of health Poor internal measurements - low capacity discharge Correlation in internal ohmic measurements Conductance, Impedance and resistance All equally effective Consistency in measurement Interpretation of results Detailed guidelines - Understand technology Apply it in maintenance program

7 An increase in internal resistance - correlate with a decrease in a cell s capacity. Each type of internal ohmic test equipment will respond to an internal resistance increase as follows: Conductance tester decrease Impedance tester increase Resistance tester increase

8 What does voltage really show us? What about Conductance for the same string?

9 Specific density + 0,84 = cell voltage Experienced people needed Can be dangerous when inaccurately applied Depth of cells/stratification is an issue Visual check Time consuming Incompatible with VRLA

10 The ultimate check, but: Costly, expensive equipment Trained personnel Impractical for large battery deployments Time consuming

11 Conductance Measurement 1. A low voltage A/C Signal is Impressed across the battery terminals (V AC ) 2. The A/C Current (I AC ) Response is measured 3. Conductance (G) is calculated using Ohm s Law: G = I AC /V AC Plate Surface Area Unique patented technology Developed for Motorola Direct Linear Correlation to Discharge Capacity The Standard recognized by IEEE IP portfolio of over 200 patents Predictive vs. Reactive

12 The better the battery > the higher conductance (Highly intuitive) The better the battery > the lower impedance Cond. Healthy battery Z End Of Life battery Imp. G

13 Conductance is a measurement of the batteries electronic and ionic components to determine how much power the battery can supply As the battery ages, their ability to deliver power decreases along with conductance Accurate correlation to discharge Reliable indication of battery state of health Conductance can identify most battery failures before they happen Conductance is a passive, quick, safe, easy and reliable way to determine a battery s relative condition or SOH

14 Application 1: Unknown battery Compare individual cells/block and look for differences Application 2: Known battery Compare with history and look for trends

15 The Midtronics Stationary Battery Management Concept is based upon three principles: 1. Improve reliability of backup power systems 2. Increase efficiency 3. Reduce cost These basic concepts can be applied in the field or in the factory. The approach is management from cradle to grave

16 Recognized, accepted technology worldwide more than 20 peerreviewed white papers and IEEE acknowledgement Innovations through patent portfolio (200+) Developed Electronic / Ohmic testing category in several markets Continuous evolution fully dedicated R&D on 3 continents

17 COMPLETE RANGE OF POWER MANAGEMENT SOLUTIONS

18 Solutions Supporting Your Business

19 Solutions Supporting Your Business Providing the system that allows for real-time connection of all elements of the power management process, enabling efficient battery management

20 Power Management Solutions

21 Power when you need it THANK YOU