New energy vehicle power battery pack air tightness test method_Automotive power battery pack air tightness testing solution 

Nowadays, the new energy vehicle industry has become a hot market. As the core component of new energy vehicles, the air tightness of the power battery pack is also crucial, which directly affects the safety of the entire vehicle.Regarding the research and development technology of power battery packs, the design requirements for strength, stiffness, heat dissipation, waterproofing, and insulation of power battery packs are very high. Therefore, the design of power battery packs is closely related to power battery pack air tightness testing and power battery pack air tightness testing.In response to the market demand for air tightness detection and air tightness testing of power battery packs, Hirays Technology relies on10With more than years of experience in air tightness testing technology, he has done in-depth research on the air tightness testing methods of power battery packs. Now he has broken through all the difficulties in air tightness testing of power batteries. 

As the quality requirements of power battery packs increase and the efficiency of automated production increases, traditional water testing methods become increasingly impractical. The method of using air tightness detectors and air tightness testers to test the air tightness of power battery packs has been widely recognized by the market, and more and more people trust this air tightness testing method. 

Appearance display of new energy power battery pack air tightness detector:

1. Air tightness test method of power battery pack:

At present, traditional air tightness testers are divided into direct pressure type, differential pressure type, and flow type according to their sensor forms.Traditional direct voltage testers have low precision and poor accuracy;Differential pressure tester has high accuracy but small detection range(Usually only5Kpa), which requires comparison standard parts and is complicated to implement.;In response to the above problems, Hiraysi Technology adopts the latest microchip technology and combines it with the independently developed system by Hiraysi Technology.“Intelligent pressure difference”Patented algorithm.exist2012The first generation of intelligent testers was developed in 2011, which is comparable to differential pressure testers in terms of accuracy, and is superior to differential pressure testers in terms of stability and cost.

In view of the disadvantages of traditional air tightness testing methods, the testing method of Hirays Technology's new air tightness tester has more advantages. It only needs to connect the air tightness tester to the testing port of the battery pack, and inflate the inside of the battery pack through the pressure regulating valve inside the instrument. After a brief inflation process, Close the pressure regulating valve to isolate the air source and power battery pack.The pressure difference sensor inside the instrument will detect the change in pressure, calculate and display the air leakage rate of the battery pack in real time, thereby realizing the air tightness test of the battery pack. At this time, the power battery pack will automatically record the history of the power battery pack and automatically determineOK/NGFunction etc.

2. Introduction to power battery pack air tightness testing technology experience:

At present, the mainstream power battery pack air tightness test in the market mainly tests the pressure into positive pressure or negative pressure. Since the power battery pack product area is large, the internal space is small, the material itself is thin, and the pressure it can withstand is small, so generally it can only accept a fewKpaor dozensKpatest pressure.However, because the air tightness requirements of power battery packs are relatively strict, the accuracy requirements for air tightness testing instruments are also relatively high.

Due to the large volume of the power battery pack, a rapid inflation method must be used to inflate the gas. At the same time, a constant pressure can be ensured after the gas is injected for a period of time.Kpaor dozensKpaThe test pressure is so that the power battery pack will not be damaged. Hirays Technology has overcome this difficulty.When using the rapid inflation method to inflate the power battery pack, when the gas reaches a certain pressure value, the internal control program of the instrument automatically adjusts the internal pressure to a certain value.Kpaor dozensKpaThe pressure range of the whole test process is generally3-5min。

three,Power battery pack field test plan display:

Four,Hirays TechnologyPower battery packAir tightnesstestInstrument introductionand parameter introduction

ClassicsThe Classic Series is a very mature and stable instrument from Hirays.With its high precision and stability, it has exceeded1000More than one set of equipment is available400Deployed and used in multiple customer factories.The functions and performance parameters of the instrument can meet the needs of most customers while also taking into account the cost performance.

◆ Highly sensitive pressure sensing and adjustment unit, combined with advanced differential pressure software algorithm, the minimum resolution can reach0.1Pa, this algorithm has obtained a national patent.

◆ The patented technology independently developed by Hai Ruisi,“IVTPneumatic sealing valve island”, greatly improving test accuracy,The stability of the instrument is ensured and the inflation speed is also greatly improved.

◆ Multiple testing functions: The instrument integrates positive and negative pressure forms and8Three test methods: Two pressure forms and five test methods can be programmed into20Various testing functions.

◆ Have more than200For more than one group of subroutines, each group of subroutines can be programmed independently and can be selected or combined to meet various complex testing requirements.

◆ Full-touch large-screen intelligent operating system, , based on the graphical representation of the detection processUIThe design and operation interface are simple and clear, easy to teach and learn.

◆ A variety of pressure adjustment components and ranges are available,.Wide pressure range(-80KPA—1MPa)Optional.The optional electronic pressure regulating valve can realize multiple sets of pressure sequential tests.

◆ Multiple communication interfaces: built-inRS232serial port,RJ45network port,USBcommunication interface,LTPexternalI/OControl port supports multiple communication protocols.

◆ Optional barcode scanning function and printer facilitate product data management and quality traceability, and instrument history records can be up to20Thousands of items can be exported to the computer in batches.

◆ The standard volume identification function can automatically identify the volume of the sample to be tested and measure and judge the leakage rate in a volumetric manner.

◆ Ultra-high stability and ease of use have been rigorously tested by the market.

◆ A variety of accessories are available, including inflatable bypass, quick connector, and standard leak hole. At the same time, the instrument supports third-party calibration and can issue a calibration report.

For the air tightness test of power battery packs, the most widely used method in the market is to use air tightness testing to directly test the positive pressure of inflation. In order to improve the efficiency of air tightness testing of power battery packs, Hirays Technology air tightness testing instruments can test the air tightness of multiple power battery packs at the same time.Detection, which can more effectively improve detection efficiency.

Multi-channel air tightnessDetectionInstrument interface display

Single channel airtightDetectorInterface display:

The copyright belongs to Hirays Technology. Reprinting and counterfeit originality are prohibited. Any violation will be at your own risk.Hiraysi Technology focuses on the R&D, production and sales of air tightness detectors, air tightness testing equipment, air tightness testers, air tightness testing equipment, waterproof detectors, waterproof testing equipment, and sealing testing equipment.10Over the years, has served800Many companies have won unanimous praise from nationally recognized companies.