Aluminum case of power battery is the main structure of power battery, made of aluminum alloy material, which mainly plays the role of protecting the electric core, isolating the internal gas of the battery and conducting heat.
JCGK Cell Shell Withstanding Voltage Test Equipment
We can also understand that the aluminum case of the power battery is like the "exoskeleton" of the battery, made of strong aluminum alloy, responsible for protecting the fragile electric cell, and also like a gas-tight chamber, which firmly seals all kinds of gases in the battery. ThereforeIts safety and performance are related to whether the "heart" of new energy electric vehicles is reliable, which directly affects whether we can travel with peace of mind.
Ⅰ.Burst Test and Pressure Resistance Test
There are two important "fitness tests" to ensure the superior quality of aluminum housings:
- Burst pressure test:Also known as the gas burst test, burst test refers to the aluminum shell burst under 1~3.5Mpa pressure, that is, the high-pressure gas impact on the aluminum shell, observe the destruction of the core shell to assess the strength of the aluminum shell.
- Pressure-resistant pressure test:Also known as gas pressure test, pressure test is generally in 1.2Mpa pressure aluminum shell does not burst open, i.e., with high-pressure gas impact aluminum shell, observe the expansion of the core shell to assess the pressure resistance of the aluminum shell.
In a nutshell.Burst pressure testThis is to "shock" the aluminum case with ultra-high pressure to see if the aluminum case "holds up" under the enormous pressure. This is to check the impact strength of the aluminum case.
Pressure-resistant pressure testThe aluminum case is continuously "hit" to check how many times it can be "hit" and to observe the deformation of the aluminum case under the repetitive action of high pressure. This is to check the durability of the aluminum case.
Battery pack airtightness testing is mainly for the battery pack shell, interface, connectors, etc. to ensure that the battery pack is not contaminated or invaded by dust, water vapor and other impurities in the external environment, to prevent the battery pack from short-circuiting, explosions and other safety accidents.
Ⅱ.Shell pressure resistance test equipment
JCGK developed this case pressure test equipment with an advanced pneumatic loading system that generates a high pressure shock of 3 MPa to the aluminum case, fully simulating the extreme pressure conditions that batteries may encounter during use.
The whole test system is highly intelligent, with a special control program to set pressure parameters, test frequency, cycle time, etc., so that the test process is highly automated. At the same time, the equipment is also equipped with precise pressure and deformation sensors, which can monitor the testing process in real time and make intelligent adjustments. Each time, the test data can be printed in real time, support U disk export, and have the function of MES data docking and traceability to ensure the accuracy of the results.
Also.JC-KT3000 pressure resistance test equipment can not only carry out the constant pressure burst test, but also has a more complex and accurate variable load multi-stage pressure resistance test function.The equipment is equipped with a unique multi-stage pressure control system that automatically changes different test pressure levels according to a preset program.
Testers can set up 5, 10, or even more levels (up to 28) of stress test procedures as needed.The equipment will progressively increase the pressure in sequence, with repeated impacts at each pressure level before moving on to the next higher pressure test.
Throughout the multi-stress variable load test, the sensor continuously monitors the deformation of the aluminum housing and automatically stops the test if any safety hazards are detected.This variable load test can be conducted continuously for more than 4800 hours, fully verifying the product's long-cycle voltage withstand reliability.
Through this precise and demanding multi-stage pressure shock test, theThe JC-KT3000 equipment can fully simulate any pressure situation that the battery may encounter during its service life, so that the safety of the battery's aluminum casing can be verified to the greatest extent. This breakthrough will significantly improve the testing level of the entire power battery industry.
III.Aluminum case voltage test procedure
Aluminum shell pressure resistance test is mainly carried out by JCGK pressure resistance test equipment, and its basic steps include:
- Prepare the product under test:Assemble the aluminum housed product with the sealing assembly and install it in the fixture mechanism of the instrument.
- Connect the air source, air line and circuit:Connect the instrument with the factory gas source 0.4~0.8Mpa (with built-in booster pump), connect the power supply and make sure the gas line is smooth. Setting test parameters: According to the pressure bursting requirement of the product under test, set the corresponding pressure loading parameters, such as test pressure, inflation rate, test time, peak float, etc.
- Start testing:Press the test button, the instrument will automatically carry out the test and display the test results. If the test result meets the requirement, the green light will be on and the interface of the instrument will show OK, then the product is qualified for pressure resistance burst; if it does not meet the requirement, the red light will be on and the interface of the instrument will show NG, then the product is not qualified for pressure resistance burst.
- Record test results:The test results are recorded in the historical test records and categorized for storage, and can be exported via USB flash drive and printed by printer in real time.
- Maintenance and upkeep:After the test, the instrument needs to be maintained and serviced to ensure long-term stable operation.
After the test is completed, the aluminum shell can be checked for deformation, rupture and other damages under overpressure conditions. Based on the test results, it can be determined whether the product meets the requirements for pressure-resistant safety. If the product is ruptured or otherwise damaged during the test, it means that the product does not meet the pressure resistance safety requirements and needs to be improved.
IV.Summarize
Through this pressure burst test, the mechanical strength and safety coefficient of the aluminum shell can be comprehensively verified to ensure that it can withstand the rated pressure in use and ensure the safety and reliability of the new energy battery.
JCGK shell pressure resistance test equipment is put into use, which greatly improves the quality control ability of power battery aluminum shell, so that electric vehicle users have more security for the power system.
If you are also interested in new energy battery testing, please feel free to consult JCGK's related instruments. Professional equipment will be your strong support in R&D and production process.
