日韩欧洲精品无码AV,99国产午夜精品一区二区天美,精品久久免费一区二区三区四区,久久综合图区亚洲综合图区,久久久久亚洲AV免费观看,精子网久久国产精品,亚洲AⅤ无码一区二区二三区性色,亚洲精品国产电影,亚洲资源在线观看,婷婷五月丁香在线

  • 
    
  • <ul id="yy6ca"></ul>
  • <del id="yy6ca"></del>
    <ul id="yy6ca"></ul>
    <strike id="yy6ca"><menu id="yy6ca"></menu></strike>
    Hotline:400-880-1556

    English




    Lithium-ion battery UN38.3 certification test items

    Author:中認(rèn)聯(lián)科 time:2020-08-03 Ctr:1198

    Nowadays, rechargeable lithium batteries such as mobile phones, laptops, camcorders, remote control toys, etc. are already very popular electronic products, so the demand for lithium battery cargo transportation is increasing. The United Nations Dangerous Goods Transport Manual" section 38.3, section 3 of the manual is the universally accepted UN38.3 certification. This certification is a United Nations regulation specifically formulated for the transportation of highly dangerous goods that require lithium batteries to pass, simulation, high and low temperature cycles, and vibration tests. , Impact test, 55C ring temperature short circuit test, impact test, overcharge and forced discharge test. UN38.3 is suitable for air transportation and daily use storage and other processes.

     image.png

    Lithium battery UN38.3 test items:

    1. Test conditions

    In order to simulate low-pressure (high-altitude) transportation, all samples to be tested need to be stored for more than 6 hours at a negative temperature of 205C and an atmospheric pressure of ≤11.6kPa. The vacuum drying oven can be used as follows: 1.2 Basic judgment. After the battery test is completed, there is no weight loss, no leakage, exhaust, disintegration, combustion, explosion, damage, etc., and the open circuit voltage is not less than 90% of the pre-test voltage.

    2. Temperature test

    In this test, rapid and extreme temperature changes are used to evaluate the sealing integrity and internal electrical connections of the test sample. Put the sample under the high temperature of 7542C and the rapid temperature shock of low temperature of -40+2C, the conversion time under the two extreme temperature conditions is ≤30min, the total impact is 10 times, the storage time is ≥6 hours at this limit temperature, and then at room temperature Store at (20±5℃) for 24 hours for a total of at least one week.

    3. Vibration test

    In order to simulate the vibration generated during transportation, the measured sample is fixed on the plane of the vibration table with a rope or tape. The sine wave is used to set the frequency between 7 and 200 Hz. The logarithmic scan time is 15 minutes, the vibration direction in the three-dimensional direction is 12 times, and the total time is 3h.

    4. Impact test

    In order to simulate the possible impact during transportation, the sample is fixed on the test device with a hard bracket, which supports all the mounting surfaces of the sample. Using half-sine wave shock, set the maximum acceleration of 150gn, the pulse time of 6ms, in the installation three-dimensional direction, positive and negative shock three times, a total of 18 times. If it is a large battery or a large battery pack, the maximum acceleration is 50gn, and the pulse time is 11ms half-sine wave shock.

    5. External short circuit test

    When fully charged, connect the thermocouple of the measurement sample to the electric blast furnace, connect the red wire clip to the battery cathode, and the black clip to clip the battery negative electrode, pull the clip out of the box, adjust the temperature in the box and stabilize the surface temperature of the sample at 55±2 ℃. Test the resistance value of the clamp lead, control the total resistance value below 0.12, and then connect the positive and negative clamp wires together to short-circuit the measurement sample. At this time, the surface temperature of the battery will rise, and after a period of time, the temperature will drop, short-circuit time until the battery temperature returns to 55±2C1h, and observe for 6h. The following content and "the test requirements are completed within 6h, there is no disassembly, damage, burning, etc., and the battery surface temperature should be ≤ 170 ℃.

    6. Impact test

    Place the thermocouple connection on the sample on a flat surface, and place a rigid rod with a diameter of 15.8mm vertically in the middle of the battery. A 9.1kg weight comes from a 61±2.5cm high free fall, hitting the rod, and monitor the surface temperature of the battery in real time and observe for 6h. For 10 samples, each sample is impacted only once. The test requires no disassembly or burning within 6 hours, and the battery surface temperature should be ≤170C.

    7. Overcharge test

    In order to evaluate the ability of the rechargeable battery pack to withstand the overcharge state, the charging current is set to twice the maximum continuous charging current specified by the manufacturer, and the charging cut-off voltage is divided into two cases:

    (1) If the charging voltage is less than or equal to 18V, the charging cut-off voltage is set to 2 times the maximum charging voltage or twice 22V:

    (2) If the charging voltage> 18V, set the charging cut-off voltage to be 1.2 times the maximum charging voltage. Note that the positive and negative cannot be reversed, and an explosion-proof net cover should be added. The battery pack should be more than 24h after the test, and there should be no disassembly or burning within 7 days.

    8. Simultaneously carry out forced discharge test

    In order to evaluate the ability of the battery to withstand forced discharge, a DC power supply, a sliding wire rheostat, an ammeter and the battery are connected in series and built into the discharge circuit. Adjust the output voltage of the DC power supply to 12V, and adjust the slip line rheostat to make the discharge current reach the maximum discharge current specified by the manufacturer and enter the discharge state. The compulsory discharge time should be equal to its nominal capacitance divided by the test current. After the test, there should be no disintegration or burning in 7 days.

    If there is no lithium battery installed in the device, and each package contains more than 24 battery cells or 12 batteries, you need to pass this test. On the cement floor, pave a piece of hardwood with a thickness of 18-20mm. Under the condition of room temperature 205C, the package will fall freely on the board from a height of 1.2m, from the top and bottom of the package, left and right, front and back in six directions, one drop in each direction, The battery is required to be free of leakage, disassembly, burning, explosion, damage, etc.

    For more information about the UN38.3 certification of lithium-ion batteries, you are welcome to inquire directly with our staff for detailed cost, quotation and cycle information.

    image.png


    Related Articles
    • CCC certification points of large capacity charging box: battery, headphones can not be less

    • CCC certification of the earphone charging case: The rated capacity of the battery cell is less than 600mAh.

    • Attention! The latest standard of EU toy safety standard EN 71-3 has been released

    • Information Express | The European Union has issued a draft regulation on energy efficiency of external power adapters, which will be implemented in 2025

    Follow Us
    奇米影视第4色| 亚洲乱码精品久久久久..| 另类婷婷综合区小说区| 男女啪啪免费体验区| 亚洲av日韩精品久久久久久| 阳茎伸入女人阳道视频免费| 纯肉无遮挡H肉动漫在线观看国产| 国产精品国产国产av| 精品无码国产一区二区三区51安| 日本做受高潮好舒服视频| 国产熟女乱子视频正在播放| 人妻无码精品久久亚瑟影视| 樱花草在线社区www韩国| 哦┅┅快┅┅用力啊┅┅动态图| 韩国v欧美v亚洲v日本v| 日本猛少妇色XXXXX猛交| 国产不卡无码视频在线播放| 免费A级毛片无码视频| 欧美日韩亚洲国内综合网| 亚洲AV无码成人网站含羞草| 丰满人妻一区二区三区视频53| 国产精品麻豆系列在线播放| 女女百合av免费在线观看 | 丰满熟妇大号bbwbbwbbw| 亚洲欧美日韩成人高清在线一区| 五月丁香综合激情六月久久 | 亚洲午夜理论片在线观看 | 久久亚洲av成人无码| 国产一在线精品一区在线观看| 日韩插啊免费视频在线观看| 午夜天堂精品久久久久| 亚洲va久久久噜噜噜久久| 欧美做受又硬又粗又大视频| 无码中文人妻在线一区二区三区| 亚洲女女女同性video| 亚洲熟妇无码一区二区三区| 亚洲日本欧美日韩中文字幕| 亚洲成AV人片天堂网九九| 日本道DVD中文字幕专区| 国产乱子伦视频一区二区三区| 青春草无码精品视频在线观看 |