CN112331947B - Lithium battery discharging method in lithium battery recycling and disassembling process - Google Patents

Abstract

Translated fromChinese

本发明公开了一种锂电池回收拆解过程中的锂电池放电方法，其包括：采用等离子体放电方法生成等离子体并形成放电导通通道，通过所述放电导通通道导通锂电池的正极和负极，实现锂电池放电；该方法可以实现将锂电池存储的能量充分安全释放，达到绿色工业化批量生产的要求，其不仅具有技术先进，智能化水平高，污染少，能耗小等诸多优点；而且符合国家现在绿水青山的环保政策，符合目前的锂电池发展的趋势，也符合整体社会发展智能化的发展需求。The invention discloses a lithium battery discharge method in the process of recycling and dismantling the lithium battery, which comprises: using a plasma discharge method to generate plasma and form a discharge conduction channel, and conduct the positive electrode of the lithium battery through the discharge conduction channel and the negative electrode to realize the discharge of the lithium battery; this method can fully and safely release the energy stored in the lithium battery to meet the requirements of green industrialized mass production. It not only has many advantages such as advanced technology, high level of intelligence, less pollution, and low energy consumption ; And it is in line with the country's current environmental protection policy of green waters and green mountains, in line with the current development trend of lithium batteries, and in line with the development needs of the overall social development of intelligence.

Description

Lithium battery discharging method in lithium battery recycling and disassembling process

Technical Field

The invention belongs to the technical field of lithium battery recovery, particularly relates to a combination of a plasma discharge technology and lithium battery recovery, and particularly relates to a lithium battery discharge method in a lithium battery recovery and disassembly process.

Background

Since the 80 s of the last century, lithium battery technology has evolved and been perfected. Since 2000, electric vehicles have been developed gradually, wherein lithium batteries have become the main energy storage form of vehicle power batteries due to their advantages of high specific energy, long cycle life, etc.; at present, the yield of lithium batteries is 50-100 ten thousand tons every year, the cycle life of the lithium batteries is about 800 times and 1000 times, the total service life is only 3-5 years, and the preparation materials of the lithium batteries comprise lithium, cobalt, fluorine and the like, which are not only expensive rare materials, but also have extremely toxic properties, and are the problems of environmental protection, resource recycling and the like, so the recovery of the lithium batteries is a problem to be faced.

The problem to be faced firstly in recycling and disassembling the lithium battery is discharging; the lithium battery has a corresponding protection system, the lowest cut-off voltage of the lithium battery is not lower than 2.5V, 3-5% of electric quantity remains, and each recovered battery is certainly not a battery with the end of discharge and has certain electric quantity. In the disassembling process, if carelessness happens, the short circuit of the anode and the cathode can be caused, and the corresponding potential safety hazards such as combustion, explosion and the like are caused.

There are four ways to deal with this currently on the market: a treatment mode adopting direct calcination is that a lithium battery is directly placed in a kiln for calcination, but the treatment causes that electrolyte, a diaphragm, an aluminum film, carbon powder and the like can not be collected, the energy consumption is high, the risks such as explosion burning in the kiln and the like still exist, the scheme is popular mainly in countries such as Japan, and the main recovery purpose is steel smelting; secondly, a liquid nitrogen freezing mode is adopted, namely, the lithium battery is directly put into liquid nitrogen for freezing and crushing, and after freezing and crushing, corresponding materials are heated and separated; the scheme is mainly adopted in countries such as the United states and the like, has the characteristics of safety, but has higher requirements on energy consumption and equipment; thirdly, a resistance discharge method, namely, manually connecting a resistor in series between a positive electrode and a negative electrode, and discharging through the resistor; the scheme has the main problems that various battery cores are different in specification and model, different in capacity and size, large in manual labor amount and difficult in batch industrial production; fourthly, 5-10% sodium chloride solution is used for soaking and discharging, the scheme is simple in process and can play a role in cooling the battery, and the safety and industrialization do not have problems; the finally recovered positive and negative electrode materials of the lithium battery and the aluminum and copper powder contain certain sodium chloride, which has adverse effect on the subsequent recycling process.

In summary, although the recycling and comprehensive utilization of lithium batteries have been developed, the current process has many disadvantages and defects in recycling and disassembling the lithium batteries for discharging. The introduction of new discharge technologies is urgently needed. The disassembly and recovery work of the lithium battery is safer, more economic, more environment-friendly and more intelligent.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a novel lithium battery discharging method in the process of recycling and disassembling lithium batteries.

In order to achieve the purpose, the invention adopts the technical scheme that:

a lithium battery discharging method in a lithium battery recycling and disassembling process comprises the following steps: and generating plasma by adopting a plasma discharge method, forming a discharge conduction channel, and conducting the anode and the cathode of the lithium battery through the discharge conduction channel. The energy stored by the lithium battery can be fully and safely released, and the requirement of green industrial mass production is met.

According to some preferred aspects of the present invention, the lithium battery is a cell in which part or all of the positive electrode and the negative electrode are exposed.

According to some preferred and specific aspects of the present invention, the discharge conducting path formed by the plasma is formed between the positive electrode and the negative electrode by immersing the electric core in the plasma.

According to some preferred and specific aspects of the present invention, the plasma discharge method employs a plasma technique that is a low pressure, low temperature plasma.

According to some preferred aspects of the present invention, the lithium battery discharging method further comprises: and respectively carrying out plasma discharge and lithium battery discharge under vacuum conditions.

According to some preferred and specific aspects of the present invention, the vacuum condition has a degree of vacuum of 0.0001 to 100 kpa.

According to some preferred aspects of the present invention, the lithium battery discharging method further comprises: and in the discharging process of the lithium battery, controlling the temperature of the lithium battery to be 0-60 ℃. According to the invention, the discharging process is safe and controllable, the working temperature of the battery is maintained below 60 ℃ by over-charging, and the conditions of battery rupture, battery fragmentation, air leakage, explosion, combustion and the like are not generated.

According to some preferred aspects of the present invention, the lithium battery discharging method further comprises: and controlling the temperature rise speed of the lithium battery to be not higher than 5 ℃/min in the processes of plasma discharge and discharge of the lithium battery.

According to a further preferred aspect of the present invention, the constant temperature discharge stabilization temperature of the lithium battery cell is controlled to be not higher than 45 ℃. The temperature rise speed is not higher than 5 ℃ per minute. Still further preferably, the battery temperature drops and the discharging of the lithium battery cell is completed.

According to some specific and preferred aspects of the present invention, when the temperature rise rate of the lithium battery is higher than 5 degrees celsius/min and the temperature is higher than 60 degrees celsius, the plasma discharge power supply is turned off and the cooling water is maintained.

According to some specific and preferred aspects of the present invention, when the temperature of the lithium battery is higher than 45 degrees celsius, the gas pressure of the discharge chamber is increased, the voltage of the plasma power supply is decreased, and the plasma density and the plasma ionization degree are decreased.

According to some embodiments of the present invention, to improve the discharge efficiency, increase the plasma discharge voltage, reduce the plasma discharge gas pressure, and increase multiple plasma discharge power sources.

According to the present invention, the lithium battery discharging method further includes: when the difference between the discharge intensity between the positive electrode and the negative electrode of the lithium battery and the intrinsic discharge intensity of the plasma discharge is less than 1% and/or the power supply value of the lithium battery is less than 1V, the discharge is terminated.

According to some preferred and specific aspects of the present invention, the discharge conditions of the plasma discharge method are: the discharge frequency is 0-2.45GHz, the discharge voltage is more than 0 and less than or equal to 10kV, the discharge air pressure is more than 0 and less than or equal to 100kpa, and the discharge gas comprises argon, helium, xenon, nitrogen and carbon dioxide; preferably argon, nitrogen, carbon dioxide.

According to some preferred and specific aspects of the present invention, the density of the plasma generated using the plasma discharge method is greater than 0 and 10 or less²¹Per m³The ionization rate is greater than 0 and less than or equal to 1%.

According to the invention, the operating temperature of the plasma discharge method is-100-1000 ℃.

According to some specific aspects of the present invention, the types of lithium batteries include, but are not limited to, ternary material lithium batteries, lithium iron phosphate batteries, lithium cobalt oxide batteries, lithium manganate batteries, and the like, and the specifications of the lithium batteries include, but are not limited to, button forms, squares, blades, and the like.

According to some specific aspects of the invention, the battery of the invention is charged, whereas no discharge is required; meanwhile, the capacity of the battery is not limited, the packaging material of the battery can be a steel shell, a soft package and the like, and in addition, the conductive state of the relevant electrode of the lithium battery is preferably in a good state, so that the discharge is facilitated.

According to some specific aspects of the present invention, the plasma discharge method employs a direct current discharge, an alternating current discharge, a high frequency induction discharge, a barrier dielectric discharge, a microwave plasma discharge, a radio frequency plasma discharge, or an electron cyclotron resonance plasma discharge, and the like, and controls the plasma discharge to be a continuous discharge and a surface plasma discharge.

According to some preferred and specific aspects of the present invention, in the lithium battery discharging method, the lithium battery is controlled to be discharged at a scale of more than 0 ton and 10 tons for a period of 0.1 to 24 hours per discharge. Meanwhile, the method is a green production process, no waste gas, waste liquid or waste solid is generated in the production process, and the energy consumption of each ton of batteries in the production is lower than 10 yuan.

According to some preferred and specific aspects of the present invention, embodiments of the lithium battery discharging method include:

(1) exposing the positive electrode and the negative electrode of the lithium battery to obtain a battery core;

(2) the electrode of the battery cell faces upwards and is placed in the discharge cavity;

(3) the discharge cavity is provided with a temperature sensing probe for monitoring the temperature of the battery cell, a vacuum pumping system for maintaining the vacuum degree, an air supplementing system for inputting discharge gas into the discharge cavity, a cooling system for reducing the internal temperature of the discharge cavity and an optical fiber spectrum measuring system for monitoring the discharge intensity of the battery cell and the intrinsic discharge intensity of plasma discharge;

(4) discharging, wherein when the difference between the discharge intensity of the positive electrode and the negative electrode of the battery cell and the intrinsic discharge intensity of the plasma discharge is lower than 1% and/or the power value of the lithium battery is lower than 1V, the discharging is terminated;

(5) vacuumizing to below 0.1pa, emptying, and taking out the battery core.

According to some preferred aspects of the present invention, the lithium battery discharging method is performed using a discharging system including:

the plasma generating device comprises a discharge cavity and a plasma generator arranged on the discharge cavity;

the cooling system is covered on the discharge cavity and used for reducing the internal temperature of the discharge cavity;

the vacuum pumping system is communicated with the discharge cavity and is used for vacuumizing;

the gas supplementing system is communicated with the discharge cavity and is used for supplementing discharge gas into the discharge cavity;

the temperature sensing probe is arranged on the discharge cavity and used for monitoring the temperature of the lithium battery;

the optical fiber spectrum measuring system is arranged on the discharge cavity and is used for monitoring the discharge intensity of the lithium battery and the intrinsic discharge intensity of the plasma discharge;

and the control system is in communication connection with the plasma generator, the cooling system, the vacuumizing system, the gas supplementing system, the temperature sensing probe and the optical fiber spectrum measuring system respectively.

According to some specific aspects of the invention, the vacuum pump adopted by the vacuum pumping system is a screw dry vacuum pump plus a roots pump vacuum system, the ultimate vacuum is 0.1pa, and the vacuum pumping speed can be 2000L/s. Meanwhile, the vacuum degree can be maintained at 0.0001-100kpa and can be controlled by matching with an argon supplementing system, a helium supplementing system, a xenon supplementing system, a nitrogen supplementing system and the like.

According to some specific aspects of the invention, the control system can adjust the discharge pressure, the discharge voltage, the discharge frequency and the like in real time according to the detection results of the temperature sensing probe and the optical fiber spectrum measurement system to control the density of the plasma, so as to control the discharge process of the lithium battery, ensure the safety of the discharge process and ensure the discharge sufficiency of the lithium battery.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

compared with pyrometallurgical smelting, the discharge method of the invention has the advantages of material recovery, higher utilization efficiency, less pollution and less energy consumption. The pyrometallurgical method can only recover metals, the recovered metals are only nickel, cobalt, copper, manganese and the like, and materials such as diaphragms, electrolyte, carbon powder, aluminum and the like cannot be recovered, so that the energy consumption is high.

The invention is different from a liquid nitrogen freezing method in that the operation of the invention is basically normal temperature operation, the energy consumption is less, and no special equipment related to more than-100 ℃ exists; and the energy consumption for processing the unit battery is lower, and the cost is lower.

The invention is different from a resistance discharge method in that the invention can realize large-scale batch production, the production automation is high, the intelligence is high, and the classification requirements on the specification, the model and the like of the battery are low. Particularly, in the discharging process of 18650 and other small-sized battery cores, the advantages of large-scale production are more obvious.

The present invention is distinguished from sodium chloride brine discharge methods in that it is pollution free. The pollution of the lithium battery pollution-related discharging solution and the pollution of sodium chloride on the lithium battery recovery do not exist. The problems of cleaning and drying process steps and energy consumption are solved.

In conclusion, the plasma discharge technology is innovatively applied to lithium battery discharge in the lithium battery disassembly and recovery process, and the plasma film shell is formed on the surface of the lithium battery by adopting discharge modes such as barrier dielectric discharge, inductive coupling discharge and the like, so that the large-scale industrialization can be realized, and pollution-free and green production can be realized. The method has the advantages of advanced technology, high intelligent level, less pollution, low energy consumption and the like; and the method meets the current environmental protection policy of the green water mountain in China, the current development trend of lithium batteries and the development requirement of the intelligent development of the whole society.

Drawings

Fig. 1 is a schematic diagram of lithium battery discharge in accordance with an embodiment of the present invention.

Detailed Description

Compared with the existing lithium battery discharging technology, the invention mainly improves the energy consumption in the discharging process, improves the safety of the discharging process, improves the pollution in the discharging process, and simultaneously protects the usable materials of the waste batteries to the maximum extent, maximizes the recovery value of the lithium batteries, and the like.

Based on the improvement, the invention provides a specific and preferred improvement scheme as follows, and the specific process steps mainly comprise:

1. removing the coating material on the surface of the lithium battery cell, and exposing the relevant electrode and the tab;

2. loading a lithium battery cell electrode face upwards into a discharge cavity;

3. related temperature sensing probes, optical fiber spectrum probes and the like are arranged;

4. vacuumizing to below 0.1pa of ultimate vacuum;

5. supplementing discharge inert gas until the working pressure is more than 0 and less than or equal to 100 kpa;

6. starting a power supply, adjusting the frequency to be 0-2.45GHz, and adjusting the voltage to be more than 0 and less than or equal to 10kV for discharging;

7. starting cooling water, and maintaining the discharge temperature at 0-60 ℃;

8. testing the temperature and the discharge spectrum of the battery, wherein the temperature is reduced, the discharge spectrum tends to intrinsic discharge, the discharge is terminated, the voltage of a lithium battery cell is less than 1V, and the discharge is finished;

9. vacuumizing to below 0.1pa of ultimate vacuum;

10. and (5) emptying the battery cell and taking out the discharged lithium battery cell.

The above-described scheme is further illustrated below with reference to specific examples; it is to be understood that these embodiments are provided to illustrate the general principles, essential features and advantages of the present invention, and the present invention is not limited in scope by the following embodiments; the implementation conditions used in the examples can be further adjusted according to specific requirements, and the implementation conditions not indicated are generally the conditions in routine experiments. Not specifically illustrated in the following examples, all starting materials are commercially available or prepared by methods conventional in the art.

Examples 1 to 6

The embodiments provide a lithium battery discharging method in a lithium battery recycling and disassembling process, which comprises the following steps:

placing the waste lithium battery core with the exposed electrode into a vacuum discharge cavity; vacuumizing to 0.1pa, filling argon (or nitrogen, helium, xenon, etc.) to the specified arc starting pressure of 0.0001-100kpa, selecting a proper power supply direct current (alternating current, high frequency, radio frequency, microwave, etc.), turning on the power supply, adjusting the frequency to a proper range between 0 and 2.45GHz, and adjusting the voltage to a proper working range between more than 0 and less than or equal to 10 kV. The discharge cavity is provided with a temperature sensing probe for monitoring the temperature of the battery cell, a vacuumizing system for maintaining vacuum degree, an air supplementing system for inputting discharge gas into the discharge cavity, a cooling system for reducing the internal temperature of the discharge cavity and an optical fiber spectrum measuring system for monitoring the discharge intensity of the battery cell and the intrinsic discharge intensity of plasma discharge;

and starting cooling water to maintain the temperature of the battery in the discharge cavity to be lower than 60 ℃, so that the discharge stability of the lithium battery is ensured. According to the optical fiber spectrum signal, when the difference between the discharge intensity between the anode and the cathode of the battery cell and the intrinsic discharge intensity of plasma discharge is lower than 1%, the voltage value of the lithium battery cell is lower than 1V, a power supply is turned off, a cooling system is turned off, the lithium battery cell is vacuumized to be below 0.1pa and is emptied, and the lithium battery cell is taken out; in the discharging process, when the temperature rising speed of the lithium battery is higher than 5 ℃ per minute and the temperature is higher than 60 ℃, the plasma discharging power supply is closed, the cooling water is maintained, and discharging is carried out again after the temperature returns to below 60 ℃.

The waste lithium battery cell placement is implemented as follows: and removing the corresponding packaging material from the lithium battery core, exposing the corresponding anode and cathode, and ensuring that the uniform surfaces of the anode and the cathode face upwards.

The discharge process conditions of the lithium batteries of the respective examples are shown in table 1.

TABLE 1 parameter table for discharging process of lithium battery cell

The method has the advantages that the voltage of the battery cell is smaller than 1V after discharging, the discharging time is short, and the purpose of safe operation can be achieved in the operation processes of disassembling and the like.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.

Claims (11)

Translated fromChinese

1.一种锂电池回收拆解过程中的锂电池放电方法，其特征在于，所述锂电池放电方法包括：采用等离子体放电方法生成等离子体并形成放电导通通道，通过所述放电导通通道导通锂电池的正极和负极；1. a lithium battery discharge method in a lithium battery recovery and dismantling process, is characterized in that, the lithium battery discharge method comprises: adopting a plasma discharge method to generate plasma and form a discharge conduction channel, and conduct through the discharge The channel conducts the positive and negative electrodes of the lithium battery;其中，所述锂电池为裸露出部分或全部的所述正极和所述负极的电芯；Wherein, the lithium battery is a cell that exposes part or all of the positive electrode and the negative electrode;使所述等离子体放电、所述锂电池的放电分别在真空条件下进行；making the plasma discharge and the lithium battery discharge respectively under vacuum conditions;在所述锂电池的放电的过程中，控制所述锂电池的温度为0-60℃。During the discharge process of the lithium battery, the temperature of the lithium battery is controlled to be 0-60°C.2.根据权利要求1所述的锂电池回收拆解过程中的锂电池放电方法，其特征在于，通过将所述电芯浸没在所述等离子体中以使所述正极和所述负极之间形成由所述等离子体构成的所述放电导通通道。2. The lithium battery discharge method in the process of recycling and disassembling a lithium battery according to claim 1, characterized in that, by immersing the battery cell in the plasma so that the gap between the positive electrode and the negative electrode is formed between the positive electrode and the negative electrode The discharge conduction channel constituted by the plasma is formed.3.根据权利要求1所述的锂电池回收拆解过程中的锂电池放电方法，其特征在于，所述真空条件的真空度为0.0001-100kPa。3. The lithium battery discharge method in the process of recycling and disassembling a lithium battery according to claim 1, wherein the vacuum degree of the vacuum condition is 0.0001-100kPa.4.根据权利要求1所述的锂电池回收拆解过程中的锂电池放电方法，其特征在于，所述锂电池放电方法还包括：在所述等离子体放电、所述锂电池的放电的过程中，控制所述锂电池的升温速度不高于5℃/min。4. The lithium battery discharge method in the lithium battery recovery and disassembly process according to claim 1, wherein the lithium battery discharge method further comprises: in the process of the plasma discharge and the discharge of the lithium battery , the heating rate of the lithium battery is controlled not to be higher than 5°C/min.5.根据权利要求1所述的锂电池回收拆解过程中的锂电池放电方法，其特征在于，所述锂电池放电方法还包括：当所述锂电池的正极和负极之间的放电强度与所述等离子体放电的本征放电强度的差别低于1%时和/或所述锂电池电源值低于1V时，放电终止。5. The lithium battery discharge method in the lithium battery recovery and dismantling process according to claim 1, wherein the lithium battery discharge method further comprises: when the discharge intensity between the positive electrode and the negative electrode of the lithium battery is equal to When the difference of the intrinsic discharge intensity of the plasma discharge is less than 1% and/or when the power value of the lithium battery is less than 1V, the discharge is terminated.6.根据权利要求1所述的锂电池回收拆解过程中的锂电池放电方法，其特征在于，所述等离子体放电方法的放电条件为：放电频率为0-2.45GHz，放电电压为大于0小于等于10kV，放电气压为大于0小于等于100kPa，放电气体为氩气、氦气、氙气、氮气或二氧化碳；和/或，采用所述等离子体放电方法生成的所述等离子体的密度为大于0小于等于10²¹个/m³，电离率为大于0小于等于1%；和/或，所述等离子体放电方法的运行温度为-100~1000℃。6. The lithium battery discharge method in the lithium battery recovery and dismantling process according to claim 1, wherein the discharge condition of the plasma discharge method is: the discharge frequency is 0-2.45GHz, and the discharge voltage is greater than 0 Less than or equal to 10kV, the discharge gas pressure is greater than 0 and less than or equal to 100kPa, and the discharge gas is argon, helium, xenon, nitrogen or carbon dioxide; and/or, the density of the plasma generated by the plasma discharge method is greater than 0 is less than or equal to 10²¹ pieces/m³ , and the ionization rate is greater than 0 and less than or equal to 1%; and/or, the operating temperature of the plasma discharge method is -100°C to 1000°C.7.根据权利要求1所述的锂电池回收拆解过程中的锂电池放电方法，其特征在于，所述锂电池的种类包括三元材料锂电池、磷酸铁锂电池、钴酸锂电池、锰酸锂电池，所述锂电池的规格包括纽扣形式、方形、刀片状。7. The lithium battery discharge method in the lithium battery recovery and dismantling process according to claim 1, wherein the type of the lithium battery comprises a ternary material lithium battery, a lithium iron phosphate battery, a lithium cobalt oxide battery, a manganese Lithium acid battery, the specifications of the lithium battery include button, square, and blade.8.根据权利要求1所述的锂电池回收拆解过程中的锂电池放电方法，其特征在于，所述等离子体放电方法采用直流放电、交流放电、高频感应放电、阻挡介质放电、微波等离子体放电、射频等离子体放电或电子回旋共振等离子体放电，且控制所述等离子体放电为连续性放电和表面等离子体放电。8. The lithium battery discharge method in the lithium battery recovery and dismantling process according to claim 1, wherein the plasma discharge method adopts direct current discharge, alternating current discharge, high frequency induction discharge, barrier dielectric discharge, microwave plasma Volume discharge, radio frequency plasma discharge or electron cyclotron resonance plasma discharge, and the plasma discharge is controlled to be continuous discharge and surface plasma discharge.9.根据权利要求1所述的锂电池回收拆解过程中的锂电池放电方法，其特征在于，所述锂电池放电方法中，控制所述锂电池每次放电的规模为大于0小于等于10吨，每次放电的周期0.1-24小时。9. The lithium battery discharge method in the lithium battery recycling and dismantling process according to claim 1, wherein in the lithium battery discharge method, the scale of each discharge of the lithium battery is controlled to be greater than 0 and less than or equal to 10 ton, the cycle of each discharge is 0.1-24 hours.10.根据权利要求1所述的锂电池回收拆解过程中的锂电池放电方法，其特征在于，所述锂电池放电方法的具体实施方式包括：10. The lithium battery discharge method in the process of recycling and dismantling a lithium battery according to claim 1, wherein the specific embodiment of the lithium battery discharge method comprises:（1）使所述锂电池裸露正极和负极，获得电芯；(1) Expose the positive electrode and the negative electrode of the lithium battery to obtain a battery cell;（2）将所述电芯的电极面朝上，并放置于放电腔体内；(2) Place the electrode of the battery cell upwards and place it in the discharge chamber;（3）在所述放电腔体上设置用于监测所述电芯的温度的感温探头、用于保持真空度的抽真空系统、用于向所述放电腔体内输入放电气体的补气系统、用于降低所述放电腔体内部温度的冷却系统，以及用于监测所述电芯的放电强度与所述等离子体放电的本征放电强度的光纤光谱测量系统；(3) A temperature sensing probe for monitoring the temperature of the battery cell, a vacuum pumping system for maintaining the vacuum degree, and a gas supply system for inputting the discharge gas into the discharge chamber are provided on the discharge chamber , a cooling system for reducing the internal temperature of the discharge chamber, and an optical fiber spectroscopy measurement system for monitoring the discharge intensity of the battery core and the intrinsic discharge intensity of the plasma discharge;（4）放电，当所述电芯的正极和负极之间的放电强度与所述等离子体放电的本征放电强度的差别低于1%时和/或所述锂电池电源值低于1V时，放电终止；(4) Discharge, when the difference between the discharge intensity between the positive electrode and the negative electrode of the battery cell and the intrinsic discharge intensity of the plasma discharge is less than 1% and/or when the power value of the lithium battery is less than 1V , the discharge is terminated;（5）抽真空到0.1Pa以下，暴空，取出电芯。(5) Evacuate to below 0.1Pa, blow out, and take out the cell.11.根据权利要求1-10中任一项所述的锂电池回收拆解过程中的锂电池放电方法，其特征在于，所述锂电池放电方法采用如下放电系统进行，所述放电系统包括：11. The lithium battery discharge method in the process of recycling and dismantling a lithium battery according to any one of claims 1-10, wherein the lithium battery discharge method is performed using the following discharge system, and the discharge system comprises:等离子体发生装置，包括放电腔体以及设置在所述放电腔体上的等离子体发生器；A plasma generating device, comprising a discharge chamber and a plasma generator arranged on the discharge chamber;覆设在所述放电腔体上且用于降低所述放电腔体内部温度的冷却系统；a cooling system disposed on the discharge chamber and used to reduce the internal temperature of the discharge chamber;与所述放电腔体连通且用于抽真空的抽真空系统；an evacuation system communicated with the discharge chamber and used for evacuation;与所述放电腔体连通且用于向所述放电腔体内部补充放电气体的补气系统；a gas supply system communicated with the discharge chamber and used to supplement the discharge gas inside the discharge chamber;设置在所述放电腔体上且用于监测所述锂电池的温度的感温探头；a temperature-sensing probe arranged on the discharge chamber and used for monitoring the temperature of the lithium battery;设置在所述放电腔体上且用于监测所述锂电池的放电强度与所述等离子体放电的本征放电强度的光纤光谱测量系统；an optical fiber spectroscopy measurement system arranged on the discharge cavity and used for monitoring the discharge intensity of the lithium battery and the intrinsic discharge intensity of the plasma discharge;控制系统，分别与所述等离子体发生器、所述冷却系统、抽真空系统、所述补气系统、所述感温探头和所述光纤光谱测量系统通信连接。The control system is respectively connected in communication with the plasma generator, the cooling system, the vacuuming system, the air supply system, the temperature sensing probe and the optical fiber spectrum measurement system.

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