VDE pushes battery test center into operation
July 09, 2012 // Christoph Hammerschmidt
Battery safety is a big issue for electric vehicles. In the past few months, several accidents with casualties highlighted the risk associated to today's traction batteries. Now the German electrotechnical industry association VDE opened a battery test facility designed as a service provider for the automotive industry as well as for research institutes and government agencies.
The VDE Battery Test Center, located in Offenbach near Frankfurt, offers more than 50 test stands enabling engineers to put lithium-ion batteries through their paces. The test stands are dimensioned in a way that they also batteries for heavy trucks can be tested; these batteries feature a weight of up to 400kg and measure up to 120 x 120 cm.
The heart of the center is a test stand designed to get granular on battery behavior in particularly heavy accidents. It includes a drop tower in which the batteries can be dropped from an altitude of 10 meters. During the free fall from this altitude, the test objects reach a speed of 50 km/h. The fall and the impact against a concrete basis or against another obstacle can be recorded by means of a high-speed camera, enabling test engineers to exactly examine the impact. In order to pass the test, the batteries must not catch fire.
In another part of the building, test machines squeeze the batteries with exactly defined forces. They also can be pierced with a metal thorn. Criteria defined in test standards such as the intruding speed of the thorn are precisely controlled.
The test center allows not only safety testing but also examinations regarding the long-term stability. Specific test stands answer the questions of the battery is sealed against spray water or dust. Do the plastic materials used to build the batteries provide sufficient protection against ultraviolet radiation? Do the materials corrode in atmospheres with high salt content or humidity? How does the behavior of the device under test change at temperatures of -70 °C or below? How does a fast temperature change of 24K per minute affect the battery's long-term stability?
Mechanical stress as it occurs under poor street conditions can be simulated at a vibration test stand. During these tests, the battery has to withstand forces of up to 120 kilo newton which change direction within a fraction of a second.
Being an electrochemical device, lithium ion batteries change their behavior as a function of the charging cycle. For this reason, the batteries under test can be charged or discharged during the test cycle with up to 800 A.
Though the new test center focuses on batteries for cars and trucks, also batteries for two-wheeler such as e-bikes or pedelecs can be tested.All news
Google, Silicon Labs mesh for ZigBee-like protocol
October 02, 2014
With industry players all battling to "own" customers and their data, the Internet of Things (IoT) market looks chaotic and ...
Will fault management solution be key to DC switch?
ARM extends into IoT software
Is there a future for the MOST bus?
Beyond programmability: full design observability at runtime
Nikola Tesla's lab could speak to future generations
October 01, 2014
Macronix rolls out European expansion plan
Intel leads non-iPad tablet processor market
Farnell element14 signs global agreement with RECOM Power
- Solutions for Millimeter Wave Wireless Backhaul
- Enter Linduino
- A Novel Approach to Industrial Rectifier Systems
- Putting FPGAs to Work in Software Radio Systems Handbook
InterviewIs there a future for the MOST bus?
In no other domain in the car, the technological evolution is advancing more rapidly than in the infotainment sector. Nevertheless, the MOST data networking technology seems to maintain its position as ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Oscium is giving away three of its iMSO-204L dual analogue iOS oscilloscopes, worth USD400 each. Designed with native Lightning compatibility, the iMSO-204L transforms the iPad, iPhone, and iPod touch into an ultra-portable, two-channel oscilloscope.
Since Apple changed its connector, Oscium has been working to bring native compatibility to its customers. The third generation...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.