CSM Computer-Systeme-Messtechnik GmbH presents the world's first digital temperature measurement system for faster battery development
CSM presents the digital temperature measurement system HV DTemp for the precise and interference-free acquisition of up to 512 temperature measurement points in a high-voltage module with only one connection cable to the central unit HV DTemp-P. This allows the analysis of the thermal behaviour of high-voltage batteries and the verification of their temperature models to be carried out quickly, efficiently and in a particularly space-saving manner down to cell level.
High requirements for temperature measurements in a high voltage battery
High-voltage batteries are an essential element for electro-mobility. Their performance and thermal behaviour define charging concepts and driving characteristics. They are thoroughly verified in terms of their thermal behaviour. Hundreds of temperature sensors must be positioned as precisely as possible for this purpose and must not impair the battery's behaviour. The temperature sensors must be miniaturized, highly accurate, robust and immune to interference so that they can be used between cells and modules in the high-voltage battery. Access to the high-voltage battery must be extremely space-saving and high-voltage safe.
CSM's new HV DTemp digital temperature measurement system (patent pending) has been specially developed to meet these requirements. 
Individual sensor arrangement with flex print
The exact knowledge of the temperature distribution and its change due to different load and charge states down to the cell level allows the optimization of battery systems and their temperature models.
The HV DTemp IC (Integrated circuit) Sensors can be arranged in different variants to suit the respective measurement point. As single sensors, the IC sensors can be connected directly to a controller. As a sensor assembly, four sensors can either be daisy chained or connected via a small distribution board. Finally, the sensors can be precisely positioned as an ultra-thin flexible circuit and connected via strip lines. 
The IC sensor arrangement can be customized to meet the exact requirements of temperature testing within the high-voltage battery, within individual modules on components or connection rails. This allows the highly accurate measurement of temperature distribution, temperature paths, temperature profiles or hot spot areas. Due to the individual, reproducible sensor arrangement as well as the sensor positioning as ultra-thin flexible circuit, the assembly of test and prototype batteries is considerably accelerated and simplified.

Connection with only one high-voltage safe measurement cable
To date, analog and thus interference-sensitive signal cables had to be led out of the high-voltage range of the battery, corresponding to the number of temperature sensors. The breakthrough of already 100 signal cables out of the battery housing to the measurement modules has so far made precise analysis considerably more difficult and in some cases even impossible. 
With the new HV DTemp digital temperature measurement system, up to 64 IC temperature sensors within the test battery are connected via a HV DTemp-M Controller. Up to eight HV DTemp-M Controllers can be cascaded in one battery. This allows the connection of up to 512 IC temperature sensors to the central unit HV DTemp-P with only one high voltage safe measurement cable. 
Interference-free and precise temperature measurements
The HV DT IC Sensors are clearly addressed via the Controllers and configured via the central unit. Data output is via CAN bus in Free Running Mode. Each IC temperature sensor generates directly digitized measured values, i.e. there is no risk of acquiring incorrect measured values due to disturbances in the signal cables. The measurement accuracy is up to 0.1 °C with a 16-bit resolution. The operating temperature range is from -40°C to +125°C.
With the new digital temperature measurement system HV DTemp, CSM enables a faster and more efficient development of batteries and energy storage devices.

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Picture description
Bild_DTemp_Measurement_System.jpg						(Copyright: CSM GmbH)
The CSM HV DTemp measurement system: HV DTemp-P Central Unit, HV DTemp-M Controller and HV DTemp IC-Sensors

Bild_DTemp_Temperature-Measurement.jpg					(Copyright: CSM GmbH)
Temperature measurement with the HV DTemp measurement system between battery pouch cells: HV DTemp IC-Sensors on an ultra-thin flexible circuit are pressed between the cells. For the detection of Hot Spot areas single sensors are installed.

You find all related pictures here: https://s.csm.de/en-press-dtemp

About CSM
CSM Computer-Systeme-Messtechnik GmbH is a leading and innovative manufacturer for mobile measurement technology and data acquisition systems. For over 30 years CSM has been setting technological standards in the field of mobile automotive measurement technology. The products of CSM are successfully used worldwide by almost all well-known vehicle manufacturers, suppliers and development service providers. CSM meets the new demands on mobile measurement technology for electric mobility and is today the market leader for high-voltage safe measurement technology. With permanent innovations and in close cooperation with customers, CSM helps to develop future mobility solutions.

For further information please contact us:
Johann Mathä
Manager E-Mobility and Marketing

CSM GmbH
Computer-Systeme-Messtechnik
Raiffeisenstr. 36
70794 Filderstadt
Telefon: +49 711 779 64-469
Fax: +49 711 779 64-40
E-Mail: jmathae@csm.de
www.csm.de

Innovative Measurement and Data Technology

CSM Computer-Systeme-Messtechnik GmbH
General Managers: Dipl.-Ing. Iris Koch, Dr.-Ing. Winfried Koch
VAT Reg. No.: DE 147862865, WEEE-Reg.-Nr.: DE 49418762
Company Location: 70794 Filderstadt, Germany
Court of Justice: Amtsgericht Stuttgart
Commercial register: HRB 222607