|
|
| >> Produkte >> Battery Safety device (BSD) |
|
Battery Safety Device (BSD)
|
|
|
|
|
Battery Safety
|
|
High energy density and high specific power are two of the key targets in battery research and development. However, both parameters result in fast energy release in case of internal or external battery failures. Additionally the thermal energy content of lithium based batteries is a multiple of the stored electrical energy. Exothermal reactions in case of overcharging or in case of short circuits can result in explosion and fire and can destroy a battery test laboratory. The risk increases with larger batteries and should not be underestimated.
BaSyTec test procedures allow to supervise a test by all monitored signals, as current, temperatures and voltages. However this method does not protect from careless mistakes and it is not independent from the control system.
The BaSyTec Battery Safety Device (BSD) is an optional extension of the BaSyTec Battery Test Systems. It will independently monitor all critical parameters of the battery and it's ambient and will switch off the batterycurrent by locking the main output relay if any parameter exceeds it's safe range
|
|
|
Technical Applications
|
|
|
The BSD is mechanically included into the BaSyTec Battery Test system but operates completely independently, so offering a second backup safety circuit to the main control system of the BaSyTec Battery Test System. It is recommended for:
All batteries and cells where safety risks are expected, i.e. Prototypes
- All NiMH Batteries with an energy content of more than 500 Wh
- All Lithium Batteries with an energy content of more than 100 Wh.
- All batteries and cells where safety risks are expected, i.e. Prototypes
|
|
Technical Data
|
|
User Interface
|
Green light everything ok
Red light emergency switch off
LCD Display showing actual values, also used for
configuration and to show critical
parameters which lock the system
20*4 characters, 85*30.5mm, backlight
6 Buttons RESET --> leave locked state. This button
and disconnecting from mains supply are
the only possibilities to unlock the BSD
ENTER, left, right, up, down --> switch
between screens and configure the device
|
|
Temperature inputs
|
Count 2 per unit
Connector D-SUB 9-pin female
Mode 4-wire connection
Sensors Pt100 (optional NTC 6k8)
Resolution Pt100: 0.05°C
Precision: 2°C
Sample rate 5Hz
Lock delay 400ms to 10s (default 2s)
|
|
Analog inputs
(Used for Gas sensors like H2, CO or any other sensor outputs)
|
Count 4 per unit
Connector D-SUB 9-pin male
Range +/-10V (optional +/-20mA), differential
Resolution 16 Bit
Precision 1% FS
Sample rate 5Hz
Lock delay 400ms to 10s (default 2s)
|
|
Main voltage
|
Count 1 per unit
Connector internally wired to the sense input of
the battery test system
Range 0-5V (optional 50V), unipolar, differential
Resolution 16 Bit
Precision 1% FS
Sample rate 5Hz
Lock delay 400ms to 10s (default 2s)
|
|
Main current
|
Count 1 per unit
Connector internally wired to the current monitor
of the battery test system
Range equal to the current range of the test system
Resolution 16 Bit
Precision 2% FS
Sample rate 5Hz
Lock delay 400ms to 10s (default 2s)
|
|
Single cell voltages
(optional)
|
Count 10 per unit
Connector D-SUB 25-pin male
Range 0-5V, unipolar, differential, common mode
up to 50V
Resolution 16 Bit
Precision 1% FS
Sample rate 5Hz
Lock delay 400ms to 10s (default 2s)
|
|
External clearance
|
Count 2 per Unit
Connector D-SUB 9-pin female
Type TTL-like input with internal 2k2 pullup
Must be connected to potential free relais
or optocoupler output
Range cleared if potential < 0.5V
locked if potential > 2.5V
0.5V to 2.5V is not allowed
Lock delay 400ms to 10s (default 2s)
|
|
External signal out
|
Count 2 per Unit
Connector D-SUB 9-pin female (same one as before)
Type Relais output with changeover contacts
max. 24V/1A each
NO output will be closed if output is enabled
|
|
calibration
|
The units will reach the specified precision without calibration.
|
|
Parameter readout
(optional)
|
All measured parameters can be read out and used by the BaSyTec Battery Test System.
For reasons of safety it is not possible to set any parameter this way.
|
|
Global enable
|
There is a global enable signal connecting all BSD’s in a system. So, if one BSD goes into locked state all others can also lock their outputs.
· So global parameters (gas sensors, emergency shutdown) need to be wired only to one BSD
· It can be configured for each input whether a failure will lock all or only one test channel
· Default is that cell voltage, temperature and current inputs do only lock the affected channel
· Default is that external clearance and analogue inputs (for gas sensors) will lock all channels
|
|
|
|
