BVS

Battery Voltage Supervisor

• Automated string and cell voltage, string current and ambient temperature and cell temperature measurements during capacity tests

• Detection and notification of failing cells
• Reliable and easy to operate
• Detailed test analysis and reporting provided using DV-B Win software
• Two models: BVS and BVS-4 (1 module per 4 cells)
• Cell temperature measurement

Description

The Battery Voltage Supervisor is a battery monitoring system for real-time data gathering and viewing.

This system’s main role is monitoring battery voltage values during a battery discharge testing in order to meet IEC, IEEE and NERC requirements.

The Battery Voltage Supervisor is an integrated system consisting of:

• Control Unit for BVS or BVS-4 (BVS-CU)
• Cell Voltage Modules (CVM or CVM-4)
• BVS-4 – One cell voltage module (CVM4) is connected to 4 cells and measures the voltage of each cell

BVS and BVS-4 systems act as an add-on to the Battery Load Unit (BLU) series of devices while performing a battery discharge test, providing detailed analysis of an individual cell’s condition. The system identifies a potential battery malfunction by monitoring the cell voltage parameters from an array of the cell voltage module.

• String voltage module (SVM) (optional)
• String current module (SCM) (optional)

The BVS-CU performs monitoring and measurements data acquisition from the Cell Voltage Modules and transfers this data to a PC. In addition, the BVS-CU provides power supply to all connected modules. Cell Voltage modules are used to measure cell parameters.

Depending on the type of cell voltage modules used, DV Power provides two models of Battery Voltage Supervisors:

• BVS – One cell voltage module (CVM) measures one cell

In addition, the BVS-CU provides ambient temperature measurements on multiple locations (4 temperature channels). Overall string voltage and string current measurements can be achieved by using optional string voltage module (SVM) and string current module (SCM).

The Cell Voltage Modules detect cells that fail a discharge test based on measured voltage values, so these cells can be safely removed from the battery string.

Data acquisition and extensive analysis capabilities of data collected from the modules is available in the DV–B Win application software suite, providing a user data viewing, tracking and generation of comprehensive reports.

Applications

The list of the instrument applications includes:

• Real time cell condition assessment by monitoring and recording cell voltages from the set modules during a battery capacity (discharge) testing as well as charging procedure.
• Real time ambient temperature monitoring with the BVS-CU unit
• Cell temperature measurement
• String voltage and current monitoring using additional string voltage module (SVM) and string current module (SCM)
• Detailed data trending and analysis provided using DV-B Win software

Battery Voltage Supervisor BVS

In the BVS system implementation, every CVM module is installed directly on an individual cell. Each cell voltage module measures parameters of one cell. Measured parameters are:

• Cell Voltage

Failure of one of the CVM modules will not affect communication between the rests of operating CVM modules and the BVS-CU. The connection diagram of the BVS to a battery string is presented in the figure below.

• Intercell connection voltage
• Cell temperature (optional)

Battery Voltage Supervisor BVS-4

In the BVS-4 system implementation, every CVM-4 module is installed to monitor up to 4 cells. Measured parameters are:

• Cell Voltage
• Cell temperature (optional) – on one of the 4 cells

Failure of one of the CVM-4 modules will not affect communication between the rests of operating CVM-4 modules and the BVS-CU. The connection diagram of the BVS-4 to a battery string is presented in the figure below.

This simplifies the connection to the battery string, since a fewer number of connections is required.

Features and Benefits

Extensive cell analysis during discharge test

DV-B Win Software

Using the BVS/BVS-4 as a supplement to the Battery Load Unit (BLU) devices provides multiple advantages during a battery discharge testing.

The Cell Voltage Modules measure voltage values in real-time mode and forward recorded data to the Control Unit in user defined intervals selected through DV-B Win application software. All out-of-tolerance measurement values are announced by a LED signalization on individual modules, so the failing cells can be detected before endangering the entire battery system. This enables detecting and safely bypassing the failing cell during a discharge process.

All results transferred from the BVS/BVS-4 system can be viewed, analyzed and presented in selectable report forms by using the DV-B Win software application.

Data can be transferred to a PC through USB or Bluetooth communication.

Both, the BVS/BVS-4 and the BLU device provided results can be viewed on the same report form.

A quick pass/fail test for a cell internal resistance values may be performed based on a user defined thresholds, adding additional insight in an individual cell’s status.

Up to 4 ambient temperature measurement channels are provided on the BVS-CU for measuring ambient temperature on multiple locations. Additional two modules can used in case string voltage and current measurements are required. Using these two optional modules enables the system to work in conjunction with any load bank on the market and perform completely automated capacity test.

DV-B Win Main Features

• Full control of the BVS/BVS-4 from a PC or a BLU-C unit
• Both discharge results from BLU device and cell voltage values from the Cell Voltage Modules can be previewed in one DV-B Win file
• Acquisition and detailed analysis of measured data
• String voltage, Cell voltage and internal resistance trending
• Test report for BLU and BVS/BVS-4 are available in several formats (Excel spreadsheet, pdf, word or RTF)
• User selected sampling time of CVM/CVM-4

DV-B Win features: String View (BLU) & Cell View (BVS/BVS-4) functions

Technical Data

Mains Power Supply

• Input voltage: 90 – 264 V AC, 50/60 Hz
• Input power: 110 VA
• CVM/CVM-4 supply voltage: 66 V DC

Measurement

• Maximum relative humidity: 95 % for temperatures up to 31 °C/88 F, decreasing linearly to 40 % relative humidity at 55 °C/131 F

Dimensions and Weight

• Dimensions (L x W x D):

BVS-CU: 206 mm x 180 mm x 64 mm

• Typical accuracy:

±50 mV DC (only for CVM): ± (1% rdg + 1% F.S)* ±1 V DC (for SCM): ± (0,1% rdg + 0,1% F.S)

• ±30 V DC (for CVM and CVM-4): ± (0, 1% rdg + 0,1% F.S)
• ± 600 V DC (for SVM): ± (0, 1% rdg + 0,1% F.S)
• Temperature:

8.11 In x 7.08 in 2.51 in CVM: 66 mm x 28 mm x 139 mm

2.6 In x 1.1 in x 5.5 in CVM-4: 66 mm x 28 mm x 139 mm 2.6 In x 1.1 in x 5.5 in SVM: 66 mm x 28 mm x 139 mm 2.6 In x 1.1 in x 5.5 in SCM: 66 mm x 28 mm x 139 mm 2.6 In x 1.1 in x 5.5 in

Weight: BVS-CU: 0, 78 kg / 1.7 lbs. CVM: 0, 14 kg / 0.3 lbs. CVM-4: 0, 14 kg / 0.3 lbs. SVM: 0, 18 kg / 0.4 lbs. SCM: 0, 18 kg / 0.4 lbs.

• 20 °C - +80 °C / -4 °F - +176 °F

Warranty

BVS-CU and CVM/CVM-4 communication

• RS485 serial communication
•  3 years

Applicable Standards

•  Pollution degree: 2

Communication with PC

• USB
• Bluetooth
•  Insulation category: I
•  Safety: EN 61010-1, LVD 2014/35/EU
• IEC 61010-1 (International standard)
• UL 61010-1

Memory

• Internal SD Card: 2 GB SD

CAN/CSA-C22.2 No. 61010-1, 2^nd edition, including Amendment 1

Electromagnetic Compatibility (EMC)

Environment conditions

• Temperature:
• CE conformity: EMC standard EN 61326-1:2013 EMC directive 2014/30/EU
• 40 °C to +85 °C /-40 °F to +185 °F

All specifications herein are valid at cell temperature of + 25 °C and recommended accessories. Specifications are subject to change without notice.

*Applies only to BVS

Ordering Info:

• * Number of CVM/CVM-4 may vary depending on application
• ** Different cable lengths available upon request
• ***Different types of temperature sensors available upon request

Order Examples (BVS):

BVS for 24 cells supervision:

BVS for 120 cells supervision:

Order Examples (BVS-4):

BVS-4 for 24 cells supervision:

BVS-4 for 120 cells supervision:

IBEKO Power AB Stockholmsvägen 18 181 50 Lidingö, Sweden

Contact Phone: +46 70 0925 000 E-mail: sales@dv-power.com