[ Juxun Wang reported ] battery safety issues among the electric car has been great concern. For the introduction of SAIC Volkswagen Tiguan L plug-in hybrid version, plug-in hybrid version of the Passat, Lavida when pure electricity, we also learned that various tests carried out by its battery system, up to hundreds of species. Which comprises: a seal test, mechanical protection, temperature difference test, limit test, and the like. Its testing standards from Germany, far more than our national standard.
one Test items: Seal Test
wading, to avoid ldquo; electric water rdquo; dangerous , SAIC public packet flooding of the battery, a high-pressure flush, and many other high-pressure steam test, sealing performance is detected. In prolonged water immersion test, the battery pack is fixed to 1 meter underwater immersion for 30 minutes; the battery pack will be subjected to high-pressure high-pressure water jet, spray water injection rate of 75 liters / minute, equivalent to 10 per square centimeter is applied pressure kg; tests in the high pressure steam, high pressure water mist will enter the battery pack case, the use of high temperature high pressure washing water jets. By detecting layers of the test case and the battery pack cooling system airtightness in different scenarios, so that drivers wading peace of mind.
The test item II: Temperature difference Test
difference aspect temperature, the public SAIC will immersion temperature shock, humidity and a series of test cycles, the battery reliability analog sudden temperature changes encountered. In immersion temperature impact test, the battery pack will be 55 degrees Celsius lower than 20 degrees centigrade rapidly into the tank and the test was repeated 20 times, analysis and comparison of airtightness, insulation resistance, resistance to ground of the battery pack of the subject, and several voltage range data 10, verify the safety performance.
The three test items: Mechanical Protection
In the crash simulation tests, 60g will impact acceleration ejection platform mounted battery pack, the battery pack required to bear their own weight 60 times the impact force without causing damage, greater than 20g ~ 28g of national standards. Multi-axis vibration test simulated the cabin will be simulated in the test arctic,Very hot, real road conditions and temperature changes in the harsh environment of the city, mountains, forests and so on, the battery for up to seven days of continuous testing. Only long experience temperature changes and the charge-discharge test remained stable battery, be considered to pass the exam.
of the test item four: the limit test
In addition to simulate the daily scene outside the car, SAIC Volkswagen also limit battery system test cases to ensure that under extreme conditions The battery pack is still a good safety performance. An external fire test, for example, the public SAIC the battery pack is directly exposed to combustion flames nearly 3 minutes, the maximum temperature during combustion can exceed 900 degrees Celsius. With well-structured protective insulation of external heat, the battery pack does not produce an explosion or fire phenomenon After the fire, in order to prove the strength of quality and safety.
In addition, SAIC Volkswagen also acupuncture battery system, water and dust, salt spray test, and many other sea water immersion test, full test performance, so that each battery pack has a solid quality.
under the protection of the quality of background, in 2020 the fourth quarter, SAIC-Volkswagen new energy plant will be officially put into operation, the first based on MEB platform to build ID. Pure electric vehicle products is about to meet with the public.