About the lithium ion battery safety testing methods were reviewed

Source: 2020 - 04 - 14 all clicks: lithium ion battery safety test method in lithium ion battery, and a complete set of non user replaceable battery/lithium ion batteries and electronic products. For the user modified cells, in the electronic products should be installed as a whole sample standard of lithium ion battery environmental safety testing; For non user modified lithium ion battery, can be used as a whole sample placed in electronic products, also can be removed separately carries on the standard of lithium ion battery environmental safety testing, suggestion choice overall samples for testing. Due to deflation may arise in the process of test, smoke, fire and explosion, and so on and so forth, it is necessary to take the necessary protective measures, such as the sample in the explosion-proof fan. 1. Low pressure test purpose: low voltage test is to simulate air transport in the process of low pressure conditions on the influence of lithium ion battery safety. Equipment: such as empty container ( Or low pressure test chamber) , charge and discharge tester and so on. 2. Purpose of temperature cycle: lithium ion battery temperature cycle test is to simulate the lithium ion battery during transport or storage safety of repeatedly exposed to low temperature and high temperature. After the test, the sample should not fire, explosion, no leakage. Equipment: such as temperature test box, charge and discharge tester and so on. 3, constant temperature and humidity chamber test equipment vibration objective: this experiment simulating lithium ion battery in the transport and handling in the process of vibration, should not result in lithium ion battery leakage, fire and explosion. Instruments and equipment, such as vibration test rig, charge and discharge tester and so on. Note: the lithium ion battery vibration test should pay attention to the following points: ( 1) Sample of the fixed, guarantee the accuracy of the vibration signal is passed to the sample without deformation; ( 2) Each sample shall be continuous in many different directions vibration test; ( 3) For the test direction, due to the shape of the lithium ion battery may be irregular, so it is necessary to test the three perpendicular direction. In addition, it is important to note that the lithium ion battery after vibration test, need a charge discharge cycle. ( Proposal vibration when using special fixture, vibration process in place to ensure that no G value change wait for a phenomenon caused by the specimen displacement) 。 4. Acceleration effect of purpose: to accelerate the impact test, lithium ion battery simulation of lithium ion battery after acceleration shock in the process of handling or transportation safety problems such as fire, explosion or liquid leakage. Instruments and equipment, such as acceleration shock test rig, charge and discharge tester and so on. Note: the acceleration of lithium ion battery impact test should pay attention to the following points: ( 1) The acceleration of lithium ion battery impact test is similar to the vibration of the lithium ion battery test. Need to pay attention to the fixed sample method, many experiments and test direction of each sample. ( 2) Lithium ion battery acceleration peak acceleration of the matters needing attention in impact test is the same as the battery to accelerate the impact test. ( 3) In addition, it is important to note that the lithium ion battery after accelerated test, need a charge discharge cycle. 5, cylinder and button type lithium ion battery, respectively, on the face and cylinder decreased respectively and two at a time. Every party for lithium ion batteries, measured the six times; The user modified the battery/lithium ion battery with equipment for drop test, the device on each side drop at a time. The sample should not be fire, explosion or leakage. Objective: this experiment simulating lithium ion battery in the process of transportation, carry and use of accidental fall ( Such as from the desk and chair, hand, etc. ) Caused by leakage, fire, explosion and other security problems. The purpose of this experiment is without considering reasonable, unpredictable, deliberately, not falling under the condition of the safety problems caused by the, simulation of the reasonable and foreseeable accidental fall. Equipment: such as multiple degree of freedom test-bed, charge and discharge tester, etc.