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| EXPERIMENTAL RESEARCH OF SPENT TRACTION BATTERY BROKEN MATERIALS |
| Received:November 23, 2020 Revised:November 30, 2020 |
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| DOI：doi：10.3969/j.issn.1671-9492.2021.03.011 |
| KeyWord:traction battery; fine crushing; powdering; pyrogenic decomposition; recovery rate |
| Author | Institution |
| LU Shijie |
1.BGRIMM Machinery & Automation Technology Co., Ltd. |
| Zhou Hongxi |
1.BGRIMM Machinery & Automation Technology Co., Ltd. |
| LANG Pingzhen |
1.BGRIMM Machinery & Automation Technology Co., Ltd. |
| Sun Xiaoxu |
1.BGRIMM Machinery & Automation Technology Co., Ltd. |
| He Jiancheng |
1.BGRIMM Machinery & Automation Technology Co., Ltd. |
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| Abstract: |
| After nearly 10 years of rapid development, the number of new energy vehicles in China has exceeded 4 million. The first batch of automobile traction batteries is about to be retired, so it is in urgent need of research on the technology and equipment to recycle spent traction batteries. This paper analyzes the material characteristics of the traction battery broken products and the key factors that influence fine crushing and powdering efficiency. The laboratory-type fine crusher is used to carry out experimental research to investigate the equipment and process parameters which affect powdering effect, such as rotor speed, material size, air blower speed, rotor type and pyrogenic decomposition. The single factor comparative test results show when the rotor speed is 3141rpm, the feed size is -9.5mm accounting to 91.6%, the blower speed is 2300rpm and the movable hammer knife rotor of fine crusher, the negative cumulative yield of -200 mesh is the highest, and the recovery rate of Co metal is the highest, fining products have good quality and high recycling value. In addition, the material is subjected to pyrogenic decomposition treatment before fine crushing to remove the adhesive on positive electrode and negative electrode plates, which can significantly improve the yield of fine-grained black powder and the recovery rate of Co metal. |
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