Battery forced internal short circuit testing machine

The single cell forced internal short circuit test system adds L-shaped nickel sheets as metal residues inside the battery cell according to standard requirements, and conducts internal extrusion tests inside the temperature explosion-proof box. The system collects the voltage and surface temperature of the battery cell, and the test results evaluate whether the battery cell has failed based on the pressure conditions and voltage drop parameters specified in the test standards. It is a specialized equipment for safety testing of single cells, battery packs, and battery cells in lithium-ion batteries

Main parameters:

A、Parameters of explosion-proof high and low temperature test chamber:

l 1Outer box material; High quality cold-rolled steel plate pickled and electrostatically sprayed box material; Inner container: made ofSUS304Made of stainless steel.

l 2The internal dimensions of the device areH700×W650×D500mmExternal dimensions of the device: approximatelyH1750MM×W1220×D1200mm.

l 3The temperature control range of the test chamber is:-25℃C～100℃ (temperature limit range:-30°C～100℃), uniformity ≤±2℃；

l 4Volatility: ±0.5℃； Heating and cooling rate:1.5-2℃/M， 降温速率：0.7℃/min；

l 5The explosion-proof high and low temperature test box has the functions of fire prevention and smoke exhaust(Test completed for rear exhaust gas;The top of the experiment is equipped with an exhaust fan)And fireproof observation window (three-layer explosion-proof insulated glass observation window), explosion-proof pressure relief hole150*150mm,Explosion proof safety chain for the box door, equipped with one lighting fixture inside the box（24VLED）. One test lead hole on the left side of the box（50mm）And equipped with high-temperature resistant silicone plugs. The insulation layer is made of polyurethane foam adhesive.

l 6Temperature controller: mature control technology;dynamicPID+Balanced temperature control; The temperature fluctuation is extremely small; Program fixed value control, human-machine dialogue operation interface, setting temperature and working time; Simple and convenient; High precision, good stability, long-lasting durability.

7Intelligent energy automatic adaptation technology; Graded refrigeration power control, selection of French Taikang high-efficiency compressor; The energy-saving effect is significant.

B、Internal extrusion control system and parameters of battery cells:

l 1Core voltage control test system: Taiwan, China DeltaPLCcontrol system+Computer software system; (Delta)PLCSignal amplifier; Delta acquisition module, Lenovo22The main components of a commercial computer are:; Complete the requirements for the experiment by manually operating computer software to set all parameters.

l 2Transmission part: It is driven by Delta servo motors+speed reducer+Light rod guide column+TThe transmission is composed of components such as toothed rods and synchronous wheels.

l 3Pressure tooling table: customized according to the size of the battery cell sample, with machine dimensions approximately deep300*wide500*tall650Pressure tooling table; It is composed of roller screw, aluminum alloy profile, limit switch, steel plate bottom platform, moving crossbeam and pressure head tooling. The pressure head isW10mm*D10mm*L100mmThe pressure tool. Test fixture small platformVType block (can be used as a cylindrical battery);

l 4Pressure cell speed setting range:0.1-5mm/SError: ±0.1%；

l 5Pressure range:0—1000N（400Nand800N）Error ±0.5％； resolution1NTime setting:0—9999HModule acquisition frequency ≥ per second1000Secondly; Accessing computer software to collect and display frequency:4-5time/S

l 6Pressure stroke:0-200mm(From the surface of the product to the bottom of the pressure head); Total pressure stroke of the experiment:0-300mm(including pressure head).

l 7Battery voltage testing requirements: Measurement voltage range:0—10VMonitor pressure drop1 mVVoltage acquisition frequency100HzVoltage acquisition rate ≥ per second1000Secondly; Accessing computer software to collect and display frequency:4-5time/S

8Sample testing space:W300*D400*H200mm;The battery sample should be smaller than the sample testing space.

C、Functional requirements:

l 1Signal control and pressure application function: The battery voltage range, reduced battery voltage range, and applied pressure can be set arbitrarily on the computer software. When the displayed value reaches any of the set values (reduced voltage)50mVOr the pressure of pressure800NSquare shaped single battery,Apply pressure to reach400Ntime)Maintain equipment pressure30SAfter releasing the applied pressure, the machine automatically stops, and the pressure applying fixture stops and starts timing. When the set time is reached, the pressure applying fixture automatically returns to its original state and stops.

l 2The battery voltage test and pressure fixture are placed in high and low temperature chambers to complete the test.

l 3Control method: temperature control touch screen; Mandatory internal short circuit control touch screen, battery, voltage signal, control and pressure function control can be controlled separately on the touch screen or computer software;

l 4You can directly observe the changes in voltage, pressure, working time, and product testing process.

l 5Pressure unit:NTheKgfTheIbOptional

l 6Power source:750WProvided by servo motor system; (More precise and stable than stepper motors).

l 7Working voltage:380V±10%，50HzThe required working power of the equipment is approximately4KW.

l 8Test material: Nitrile rubber（NBR,side10mmThick2mm）Acrylic based（acryl,side5mm, thick2mm）Five pieces each.LType nickel sheet（0.2mmHigh,0.1mmWide, on each side1mmLong)50The film.

l 9Equipment placement space: within the designated space area: equipment less than the width1400mm xdepth1600mm xtalldegree2150mm.

l 10Add wireless remote control with start and stop functions.

l 11Equipped with pluggable thermocouple wires, it integrates the function of monitoring whether the sample temperature reaches the set temperature value.

Computer software has the ability to export voltage/Time curve chart, squeezing force/The ability to plot time curves.