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Summary of lithium-ion battery safety test methods

by:dcfpower     2021-03-10
Lithium-ion batteries, as well as a whole sample composed of non-user-replaceable batteries/lithium-ion batteries and their electronic products. For non-user-replaceable batteries, they should be installed in electronic products as a whole sample for the standard lithium-ion battery environmental safety test; for non-user-replaceable lithium-ion batteries, they can be placed in electronic products as a whole sample. It is also possible to take out the lithium-ion battery separately and perform the environmental safety test of the lithium-ion battery in the standard. It is recommended to choose the overall sample for testing. Since air leakage, smoke, fire or even explosion may occur during the test, necessary protective measures must be taken, such as placing the sample in an explosion-proof ventilation device. 1. Low air pressure Test purpose: The low air pressure test is used to simulate the effect of low air pressure during air transportation on the safety of lithium-ion batteries. After the test, the sample should not fire, explode, and leak. Equipment: such as vacuum box (or low-pressure test box), charge and discharge tester, etc. 2. Purpose of temperature cycle test: The temperature cycle test of lithium ion battery is used to simulate the safety of lithium ion battery when it is repeatedly exposed to low temperature and high temperature during transportation or storage. The test is used quickly and extreme The temperature change is carried out. After the test, the sample should not fire, explode, or leak. Equipment: such as temperature test chamber, charge and discharge tester, etc. u003cpu003eu003c/pu003e  3. Vibration    Test purpose: This test simulates the vibration during transportation and carrying and should not cause safety problems such as leakage, fire and explosion of lithium-ion batteries. Equipment: such as vibration test bench, charge and discharge tester, etc. Note: The following points should be paid attention to in the vibration test of lithium ion battery: (1) The fixing method of the sample must ensure that the vibration signal is accurately transmitted to the sample without deforming the sample; (2) Each sample needs to be continuous Withstand the vibration test in different directions; (3) Regarding the test direction, because the shape of the lithium-ion battery may be irregular, it is necessary to test all three directions perpendicular to each other. In addition, it should be noted that after the vibration test of the lithium ion battery, a discharge and charge cycle is required. (It is recommended that special fixtures should be used when vibrating to ensure that there is no change in G value caused by sample displacement during vibration).  4. Acceleration shock    Test purpose: Li-ion battery acceleration shock test is to simulate the safety problems such as fire, explosion or liquid leakage after the lithium-ion battery encounters acceleration shock during carrying or transportation. Instruments and equipment: such as acceleration shock test bench, charge and discharge tester, etc.   Precautions: The following points should be noted in the acceleration shock test of lithium ion batteries: (1) The acceleration shock test of lithium ion batteries is similar to the vibration test of lithium ion batteries. It is necessary to pay attention to the fixing method of the sample, multiple tests for each sample, and test direction. (2) The precautions for the peak acceleration of the lithium battery pack acceleration shock test are the same as the battery acceleration shock test. (3) In addition, it should be noted that a discharge and charge cycle is required after the acceleration test of the lithium ion battery. 5. Drop The cylindrical and button lithium-ion batteries are dropped once on each end, and the cylindrical surface is dropped twice, for a total of four drop tests; the square lithium-ion battery is dropped once on each side for a total of six tests; Perform a drop test with equipment for non-user-replaceable batteries/lithium-ion batteries, and the equipment drops once on each side. The sample should not fire, explode, or leak.   Test purpose: This test simulates accidental falls during transportation, carrying and use (such as falling from benches, desktops and hands) and should not cause safety problems such as leakage, fire and explosion of lithium-ion batteries. This test simulates a reasonable and foreseeable accidental fall, and does not consider safety issues caused by man-made, deliberate, unreasonable and unforeseen falls. Equipment: such as multi-degree-of-freedom test bench, charge and discharge tester, etc. u003cpu003eu003c/pu003e   Precautions: The following points should be noted in the drop test of lithium ion batteries: (1) Each sample needs to withstand the drop test in different directions several times; (2) Necessary measures need to be taken to ensure the test direction Accuracy, and this measure should not affect the free fall motion; (3) The drop test conditions of lithium-ion batteries also take into account accidental drops during actual use. Therefore, a 1.5m drop test is required for some lithium-ion batteries; in addition, , It should be noted that a drop of lithium-ion battery requires a discharge and charge cycle.  6, stress relief   The structure of the molded or injection molded thermoplastic shell should be able to ensure that any shrinkage or deformation of the shell material will not expose the internal components when the shell material releases the internal stress generated by the molding or injection molding. The outer shell of the sample should not undergo physical deformation that would expose the internal composition.   Test purpose: The stress relief test is to simulate the ability of the lithium-ion battery to maintain the integrity of the outer shell after being subjected to an appropriate high temperature. Equipment: such as high temperature test chamber, etc.  
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Boasting good reputation in the industry, Shenzhen Chuangneng Ruiyuan Electronics CO.,LTD. is the leading custom lithium ion battery supplier, offering high quality and custom lithium ion battery services for homes and enterprised all over the world. More info on Ruiyuan Electronics.
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