Evaluation of the packaging properties of the hott

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Evaluation of packaging properties of sealed wet storage battery for dangerous goods transportation (IV)

3.2.2 electrolyte leakage of storage battery in high temperature test

there are two main situations

1) before high temperature test, store 1 Maximum experimental torque: when cracks or holes are opened in the shell of ly10nm, 20nm, 50nm, 100nm, 200nm batteries, a small amount of free electrolyte exists in the battery or the electrolyte exuded during the vibration process is not re adsorbed by the electrode plate and diaphragm, so it leaks out of the cracks or holes

2) during the high-temperature test, the viscosity of electrolyte decreases with the increase of temperature, and the fluidity increases. At the same time, the high temperature also causes glass fiber, but the adsorption capacity is affected by the aging of partition materials such as 1 dimension with our children every day, which makes the originally adsorbed electrolyte separate out of the partition, resulting in the leakage of battery electrolyte

3.2.3 reasons for electrolyte leakage in the differential pressure test of the battery

there was a batch of electrolyte leakage in the differential pressure test. The reason was that the quality of the safety valve (exhaust hole) was poor, which was deformed and opened under high pressure, so that the external high-pressure gas entered the battery, squeezed the partition plate to separate the adsorbed electrolyte, and flowed out of the open liquid injection port, causing electrolyte leakage

4 conclusion

1) the potential electrolyte leakage and electrode short circuit of the battery are harmful to the transportation safety. The form of transportation packaging must be determined according to the dangerous attribute evaluation results of the battery, and excessive packaging should be prevented while ensuring the transportation safety

2) according to the basic provisions of the maritime dangerous regulations on the attribute classification and packaging category of the transport packaging of dangerous goods of sealed wet storage batteries, after the test of the test method proposed in this paper, the electrolyte of the exported storage batteries has not leaked, and the structure has not been deformed or damaged, and the electrodes are effectively packaged against short circuit, the transport packaging of this batch of storage batteries can use ordinary packaging, which is not limited by the maritime dangerous regulations. Once the test fails, it must be packed in strict accordance with the provisions of the maritime safety code, and the packaging performance test of the specified items must be carried out according to the packaging method before shipment and export, so as to ensure transportation safety

3) the test and evaluation method of the transport packaging properties of Miji wet battery for dangerous goods proposed in this paper makes the evaluation of the transport packaging of this kind of battery standardized and operable. The application of this method by production enterprises and inspection institutions has played a positive role in the attribute classification of dangerous goods and the evaluation of transportation packaging of exported storage batteries. The implementation has achieved good results and effectively promoted the export. In the future, we will continue to explore effective methods for the attribute classification and transportation packaging evaluation of other types of storage batteries on the basis of the evaluation methods of the transportation packaging attributes of hazardous goods of sealed wet storage batteries, as an operable document for the implementation of the maritime hazard code, and become an industry standard detection method, striving to obtain international recognition

(author/Guo Renhong [1] Lu Ruiqiang [1] Chen Kai [2] Chen Li, the subsidy standard will drop by 40% from 2016. Ting [2] Xu Geling [1]

[1] Guangzhou inspection and Quarantine Bureau, Guangzhou 510623 [2] Jiangmen inspection and Quarantine Bureau)

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