Remote control large current short circuit devices are designed according to standard requirements of various kinds ofbattery short circuit test.It applys to many standard specifications,such as GB IEC EN UN38.3 UL QC/T 743-2006 Lithium ion battery for electric vehicle,Lithium ion power battery pack and system for electric vehicle part 3:Safety requirements and test methods,“863 plan”Energy saving and new energy vehicles major projects 2008 EV lithium ion power battery performance test specification etc.According to standard requirements,the short circuit device mustconform to the internal resistance range<5mΩ(or20mΩ),so that maximum short-circuit current,which is required for the test, would be measured.

Equipment design discription:

This devices are designed according to standard requirements of various kinds of battery short circuit test, so thatmaximum short-circuit current,which is required for the test, would be measured.

Besides, short circuiting device must also be able to withstand large current impact.So we choose the industriallevel DC electromagnetic contactor, pure-copper wiring terminal and internal copperplate to deflect, which effectively improve the cooling effect and ensure the security of large current short circuit device , effectively reduce the loss of test equipment, ensure the accuracy of test data.

Control method:

Adopts PLC man-machine interface control mode.Use the relay contactor as switching element, set up the test conditions on the interface of PLC. Actuation of contactors emits strong short-circuit current ,which reaches the current required by the test.The loop resistance in the process (i.e. contactor resistance + connecting pin wiring + battery clamp) smaller than 5mΩ(or 20mΩ). The maximum short-circuit current that testing circuit can withstand is 5000A. The battery surface temperature,voltage change data and current change data are detected by collecting element and feed back to PLC main control program.

Standard

QC/T 743-2006 Lithium ion battery for electric vehicle

QC/T 744-2006 Metal hydride nickel batteries for electric vehicles

GB/T 31467.3-2015 Lithium ion power battery pack and system for electric vehicle -

Part 3: Safety requirements and test methods

GB/T 31485-2015 Safety requirements and test methods for power batteries for electric vehicles

GB/T 31241-2014 Safety requirements for lithium ion battery and battery pack for portable electronic products

GB/T 8897.4-2008 Part 4 of the primary battery safety requirements of lithium batteries

YD/T 2344.1-2011 Lithium iron phosphate batteries for communication - part one: integrated batteries

GB/T 21966-2008 Safety requirements for lithium primary batteries and batteries in transit

MT/T 1051-2007 Lithium ion battery for miner's lamp

YD 1268-2003 Safety requirements and test methods for lithium batteries and chargers of mobile communication handsets

GB/T 19521.11-2005 Safety code for inspection of hazardous features of lithium battery pack

YDB 032-2009 Backup lithium ion battery for communication

UL 1642:2012 Lithium battery standard

UL 2054: 2012 Household and commercial battery pack

UN38.3(2012) Recommendations on the transport of dangerous goods -Test and standard manual part 3

IEC62133-201 Safety requirements for battery and storage battery with alkaline or non acid electrolytes

IEC 62281: 2004 Safety requirements for lithium primary batteriy and battery pack in transit

IEC 60086: 2007 Primary battery part 4 safety requirements of lithium battery

Short circuit test requirements

Short circuit test follow these steps

Charge battery module fully

Make the battery module short circuit for 10min by external , external circuit resistance

should be less than 5mΩ

Observe for an hour

Requirement:single battery do not explode or burn as qualified

Equipment features overview

Control system:

Feature: PLC touch human-machine interface, simple and intuitive operation

Record the battery surface temperature, current, voltage, resistance during omnidistance

Automatic control the test process

Box structure features :

Equipment material: inner box 2mm SUS#304 stainless steel

Outer box: 2.0mm cold-rolled plate stoving varnish

Smoke exhaust and ventilation function:the left side of the device is equipped with an air inlet, the top is equipped with a smoke exhaust port, and the exhaust gas generated in the process of testing can be discharged to the outside through the air-blower and the reserved exhaust pipe at the top.

Introduction of control and acquisition system

Contactor features:

Remote switching on and off AC operating voltage to 220V

Rated working current 10A AC, series magnetic blow-out mediastinal plate clay arc shield arc quenching system

The electromagnetic system and the main contact arc quenching system are respectively fixed on the Mounting chassis.

The utility model is characterized in that the utility model It adopts an angular-rotating clapper-type electromagnetic system and a double winding attracting coil. A pressing edge device is arranged on the rotating edges and corners.

The main contact is made of red copper.Lower the contact resistance,faster the reaction speed.

The contactor is reliable, safe, long service life and convenient maintenance

Remote control:

Long distance wireless control

Reliable, stable, with self-locking and interlock function, strong anti-interference ability, long life