BACS ™ (Pat. Pending)

Battery Analyse and Care System

Text for an invitation to tender

The Batterymanagement has to support at least the following functionality:

  • Autoadaptive control of the charging voltage of each cell(equalization voltage) for optimum usage of the battery capacity and for increasing the service life.
  • Active measurement of internal resistanceof each battery.
  • Measurement of voltage and temperature of each battery.
  • Easy installation due to a bussystem.
  • Control of up to 192 batteries in 1-10 parallel lines from a single BACS Webmanager.
  • Display for monitoring fault signals.
  • Connectivity and simultaneous control for UPS and other devices with a serial interface.
  • Possibilty of logging all battery data (resistance, voltage, temperature) for a duration of several years on an internal FlashCard.
  • Integrated web-interface for easy configuration and administration and status messages.
  • Automatic alerts via network, modem, e-mail. SNMP or RCCMD.
  • Connectivity of additional sensors and actuators for temperature, humidity, electricity or liquid hydrogen.

 Intelligent equalization voltage

The function of the autoadaptive control is to allocate the voltage consistent from the battery charger / UPS to all connected batteries / accumulators.

The BACS control unit collects the voltages, temperatures and impedances of each connected battery module via the bus system and calculates continuous the desired value of the charging voltage of each battery cell, dependent on the momentary overall voltage.

This desired value again is sent to each module. The modules adjusting the voltage by themselfes by using the integrated bypass. I.e. an accumulator with a higher impedance tries to raise the current charging voltage.

As soon as the voltage exceeds its desired value, the battery module activates the bypass and.conducts a part of the charging voltage “around” the batteries.

Hence the voltage of each battery remains constant. The part of voltage that was conducted around one battery is now provided to the other batteries, so the other batteries will receive the same voltage like the one with a higher impedance.

Because of the optimized charge obtained by the BACS- Equalizing-Principle, an up to 18% higher overall capacity of the batteries is achieved.

Furthermore the overcharging of single batteries is avoided (outgassing) so they can’t run dry and deep discharge.

The intelligent equalization voltage of the batteries drastically raises the service life and reliability. The autoadaptive control has another major advantage. In case of measuring a battery with a higher impedance than configured, this single battery can be exchanged with a new one. The difference of the load between the new and the current batteries, is totally adjusted by the BACS- Equalizing-Principle.

 Active control

Each battery module possessesa test circuit for an exact analysis of any single accumulator, which allows a time controlled measurement of the internal resistance (every 30 minutes).

In case that the internal resistance raises because of corrosion or sulphate deposit an alarm is activated, as long as the configured maximumexcesses its value.

This innovative principle of measurement potentiatesto give the user sufficent noticebefore a battery breakdown and not as hitherto when it’s too late.

I.e. the internal resistance raises because of sulphate deposit and the user is informed in time.Now it is possible to counteract with a discharge/charge cycle to get the internal resistance to a normal value. In addition for each accumulator the voltage, temperature and bypass activity will be logged and permanantly statistically evaluated. When one of these values exesses its limit an accordingly alarm will be activated.

 Analysis, forwarding alarm messages and storage of the data

All data and information deliverd by the battery modules will be analyzed and stored by the central unit, the BACS Web Manager.

The evaluation unit administrates up to 192 battery modules.

The battery modules can be divided in up to 10 parallel lines but because of simplicity they are addressed linear.

An LCD displays the current state of the accumulators and the UPS (the UPS has to be connected serial). The WEB Manager disposes of an internal Compact Flah Card, which is used to store the values for time, voltage, internal resistance, temperature and bypass activity of all accumulators for a time span of multiple years.

Occuring battery or UPS alerts are stored with date and time in the logfile as well as they are displayed on the LCD. Additionally an alarm is locally acoustically signalled by a beeper.

To assign all data and alerts chronological, the WEB Manager is equipped with a RTC (Real Time Clock), which can be synchronized with a time server in the network.

The WEB Manager possesses an integrated web server for displaying all system values and for providing a convenient configuration interface.

All settings can be changed by connecting with a browser via the network to the WEB Manager. Battery or UPS alerts can be optionally redirected and can be send via the network as E-Mail, SMS, SNMP or RCCMD signal.

 Installation

To offer a very fast installation of the BACS modules, an optical isolated bus system is used. The battery modules are fixed to the batteries with special hook-and-loop tape and are connected to the battery poles. After plugging the bus system and addressing the modules, the BACS Manager is ready for use.

Technicaldataand dimensions of the BACS™ WEB-Manager:

Processor and memory:32-Bit RISC-Processor, 4MB Flash, 8MB RAM

128MB CompactFlash Card (r higher)

Display:double spaceddisplay with 16 characters per line.

Operating controls:1 pushbutton (reset)

Interfaces:RJ12, battery bus-interface,

RJ45, 10/100Mbit Ethernet interface,

2x RS-232 serial interface,

two-polealarmoutput, 250VAC, 2W

Case:Aluminium, RAL 7035 (Light grey)

Dimensions:126 x 40 x 70mm (width x height x depths)

Weight:240g

Temperature measuring0 - 45°C, max. humidity 90%,

range:non condensing

Technical data and dimensions of the BACS™C1 Module:

Moduletype:C001

Accumulator capacity:7Ah – 12 Ah

Voltage measuring range (nom):6V or 12V

Voltage measuring range:[2,8 – 9,1]6 V or [5,5 – 18,2]12 V

Impedance measuring range:1 – 100m

Temperature measuring range:-5°C - +60°C

Accuracy:Voltage: < 0,5%

Impedance: < 4%

Temperature: < 3%

Interfaces:Bus interface, MIC 04 connector

Isolation:completely sealed

Dimensions:ca. 55 x 32 x 4mm (width x height x depths)

Technical data and dimensions of the BACS™C7 Module:

Moduletype:C007

Accumulator capacity:14Ah – 65 Ah

Voltage measuring range (nom):6V or 12V

Voltage measuring range:[2,8 – 9,1]6 V or [5,5 – 18,2]12 V

Impedance measuring range:1 – 30 m

Temperature measuring range:-5°C - +60°C

Accuracy:Voltage: < 0,5%

Impedance: 3%

Temperature: 3%

Interfaces:Bus interface, MIC 04 connector

Isolation:completely sealed

Dimensions:ca. 90 x 75 x 10mm (width x height x depths)

Technische Daten und Abmessungen BACS C8 Modul:

Moduletype:C008

Accumulator capacity:70Ah – 250 Ah

Voltage measuring range(nom):6V or 12V

Voltage measuring range:[2,8 – 9,1]6 V or [5,5 – 18,2]12V

Impedance measuring range:0,1 – 15 m

Temperature measuring range:-5°C - +60°C

Accuracy:Voltage: < 0,5%

Impedance: 3%

Temperature: 3%

Interfaces:Bus interface, MIC 04 connector

Isolation:completely sealed

Dimensions:ca. 90 x 75 x 10mm (width x height x depths)