The use of lithium-ion batteries (LIBs) has grown in recent years, making them a promising source of secondary raw materials due to their rich composition of valuable materials, such as Cobalt and Nickel. Recycling LIBs can help reduce fossil energy consumption, CO₂ emissions, environmental pollution, and consumption of valuable materials with limited supplies. On the other hand, the hazards associated with spent LIBs recycling are mainly due to fires and explosions caused by unwanted short-circuiting. The high voltage and reactive components of end-of-life LIBs pose safety hazards during mechanical processing and crushing stages, as well as during storage and transportation. Electrochemical discharge using salt solutions is a simple, quick, and inexpensive way to eliminate such hazards. In this paper, three different salts (NaCl, Na₂S, and MgSO₄) from 12% to 20% concentration are investigated as possible candidates. The effectiveness of discharge was shown to be a function of molarity rather than ionic strength of the solution. Experiments also showed that the use of ultrasonic waves can dramatically improve the discharge process and reduce the required time more than 10-fold. This means that the drainage time was reduced from nearly 1 day to under 100 minutes. Finally, a practical setup in which the tips of the batteries are directly immersed inside the salt solution is proposed. This creative configuration can fully discharge the batteries in less than 5 minutes. Due to the fast discharge rates in this configuration, sedimentation and corrosion are also almost entirely avoided.

近年来，锂离子电池 (LIB) 的使用有所增长，由于其丰富的有价值材料（如钴和镍）的成分，使其成为很有前景的二次原材料来源。回收锂离子电池有助于减少化石能源消耗，CO ₂排放、环境污染以及供应有限的有价值材料的消耗。另一方面，与废锂电池回收相关的危害主要是由于不必要的短路引起的火灾和爆炸。报废锂离子电池的高压和电抗元件在机械加工和破碎阶段以及储存和运输过程中会造成安全隐患。使用盐溶液进行电化学放电是消除此类危害的一种简单、快速且廉价的方法。在本文中，三种不同的盐（NaCl、Na ₂ S 和 MgSO ₄) 从 12% 到 20% 的浓度被研究为可能的候选者。放电的有效性被证明是摩尔浓度的函数，而不是溶液的离子强度。实验还表明，使用超声波可以显着改善放电过程，并将所需时间减少 10 倍以上。这意味着引流时间从近 1 天减少到 100 分钟以下。最后，提出了一种实用的设置，其中电池的尖端直接浸入盐溶液中。这种创造性的配置可以在不到 5 分钟的时间内将电池完全放电。由于这种配置中的快速排放速率，几乎完全避免了沉降和腐蚀。