Discharging and electrolyte recycling equipment for waste batteries

Abstract

The utility model provides waste battery discharging and electrolyte recycling equipment. The waste battery discharging and electrolyte recycling equipment comprises a discharger for discharging a waste battery; the heater comprises a heat source, and a first heating end and a second heating end which are connected with the heat source for heat conduction; and the negative pressure recoverer comprises a suction pipe, a condensing device connected with the suction pipe and a vacuum pump for providing suction pressure for the suction pipe. The waste battery discharging and electrolyte recycling equipment provided by the utility model comprises the heater, and the first heating end of the heater is directly connected with the positive pole of the waste battery in a heat conduction manner, so that the positive pole can directly transfer heat to the positive current collector; and the second heating end of the heater is directly connected with the negative pole of the waste battery in a heat conduction manner, so that the negative pole can directly transfer heat to the negative current collector, the current collector in the waste battery is quickly heated, the heating in the waste battery is more uniform, and the electrolyte is more quickly and uniformly vaporized.

Description

Technical Field

[0001] This utility model relates to the field of waste battery recycling technology, and in particular to a waste battery discharge and electrolyte recovery device. Background Technology

[0002] Power batteries in new energy vehicles are currently the core product in the battery field. With the continuous development of the new energy vehicle industry, the recycling of power batteries has become a crucial issue that urgently needs to be addressed. When power batteries reach the end of their service life, they need to be retired and enter the battery recycling market for reuse. For some power batteries that meet certain usage conditions, they can be downgraded and used in new fields; while power batteries that no longer meet usage standards need to be dismantled, and their usable materials extracted for recycling, minimizing the environmental pollution caused by the disposal of power batteries.

[0003] Currently, the industry mainly divides the recycling of spent power batteries into three methods: dry recycling, wet recycling, and physical recycling. All three methods require discharging the spent power batteries, followed by crushing, to recover high-value metal elements. Currently, the industry typically recovers electrolyte by soaking the spent power batteries in brine for discharge, then crushing and burning them. The electrolyte is recovered by collecting the vapors released during combustion and condensing them. This method of electrolyte recovery has the following problems: 1. During transportation and storage, the presence of electrolyte in the spent power batteries can easily lead to short circuits and thermal runaway; 2. Using brine for discharge results in low efficiency and inconsistent discharge results because the remaining charge of each spent power battery is not fixed. Furthermore, the spent power batteries are prone to damage and leakage during the soaking process, thus contaminating the soaking solution.

[0004] Chinese patent application CN109346739B discloses a device and method for recycling electrolyte from lithium-ion batteries. In this recycling device, a heating device is attached to the lithium-ion battery, and the heating device heats the lithium-ion battery through its casing. This heating method is not only inefficient but also results in uneven heating inside the lithium-ion battery. While this method can be used for small lithium-ion batteries, for large batteries or those with high electrolyte capacity, it either fails to achieve complete electrolyte recovery, leaving electrolyte residue inside the battery, or it results in slow and uneven heating, leading to low recycling efficiency.

[0005] Chinese patent application CN116053635B discloses a method for recycling electrolyte from lithium-ion batteries. This method involves placing lithium batteries into a vacuum chamber with a set temperature and adjusting the temperature of the chamber to achieve the set temperature. However, this method is extremely costly for electrolyte recycling. Firstly, it requires vacuum chambers large enough to hold multiple lithium batteries. Secondly, it requires the ability to regulate the temperature within the vacuum chamber. These two factors significantly increase the cost of electrolyte recycling and hinder the widespread adoption and promotion of this method.

[0006] Therefore, how to effectively recycle the electrolyte in used power batteries and how to improve the recycling efficiency of used power batteries and the electrolyte recycling efficiency are urgent problems that the battery recycling industry needs to solve. Utility Model Content

[0007] The purpose of this invention is to solve the problems of existing waste power batteries, such as the tendency for short circuits and thermal runaway caused by the electrolyte in the internal electrolyte during the recycling process. The salt water immersion discharge method for recycling the electrolyte is time-consuming and inefficient. The vacuum device recycling equipment is costly and occupies a large space, resulting in high recycling costs and hindering its widespread adoption. The invention provides a waste battery discharge and electrolyte recycling device.

[0008] The technical solution adopted by this utility model to solve its technical problem is: a discharge and electrolyte recovery device for waste batteries, comprising: a discharger, set at the discharge station, for discharging waste batteries; a heater, set at the heating station, including a heat source, a first heating end and a second heating end connected to the heat source for heat conduction; when the waste battery is in the heating station, the first heating end is heat-conductedly connected to the positive terminal of the waste battery, and the second heating end is heat-conductedly connected to the negative terminal of the waste battery; and a negative pressure recovery device, set at the heating station, including a suction pipe, a condensation device connected to the suction pipe, and a vacuum pump for providing suction pressure to the suction pipe; when the waste battery is in the heating station, the suction pipe is inserted into the safety valve of the waste battery.

[0009] In one embodiment, the discharger includes a discharge resistor, a positive terminal connected to the discharge resistor, and a negative terminal connected to the discharge resistor. When the waste battery is in the discharge position, the positive terminal is electrically connected to the positive terminal of the waste battery, and the negative terminal is electrically connected to the negative terminal of the waste battery.

[0010] In one embodiment, the discharge resistor of the discharger is in contact with the heat source of the heater, and the heat source absorbs the heat generated by the discharge resistor.

[0011] In one embodiment, the system further includes a station switching platform that supports the waste battery and moves the waste battery between the discharge station and the heating station.

[0012] In one embodiment, the condensation device of the negative pressure recovery unit includes a first condenser tube connected to the suction tube, the first condenser tube having a condensation temperature of 5°C-15°C.

[0013] In one embodiment, the condensation device of the negative pressure recovery unit further includes a second condenser connected to the first condenser, the second condenser having a condensation temperature of -10℃ to 0℃.

[0014] In one embodiment, the condensation device of the negative pressure recovery unit further includes a recovery tank, the recovery tank including a tank body, a first recovery pipe connecting the first condenser pipe to the tank body, and a second recovery pipe connecting the second condenser pipe to the tank body.

[0015] In one embodiment, the vacuum pump pressure is 10-45 kPa, and the vacuum pump is fixedly connected to the condensation device.

[0016] In one embodiment, the heating temperature of the heater is 100°C-150°C.

[0017] In one embodiment, the heater further includes an insulation sleeve disposed on the heating station and fitted over the waste battery.

[0018] The beneficial effects of the waste battery discharge and electrolyte recycling equipment provided by this utility model are as follows: it includes a discharger for discharging waste batteries, and a heater. The first heating end of the heater is directly heat-conductingly connected to the positive electrode post of the waste battery, so that the positive electrode post can directly transfer heat to the positive current collector. The second heating end of the heater is directly heat-conductingly connected to the negative electrode post of the waste battery, so that the negative electrode post can directly transfer heat to the negative current collector. This rapidly heats the current collector inside the waste battery and ensures more uniform heating inside the waste battery, and faster and more uniform vaporization of the electrolyte. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a three-dimensional structural diagram of the waste batteries that are applicable to the discharge and electrolyte recycling equipment for waste batteries provided by this utility model.

[0021] Figure 2 This is a three-dimensional structural diagram of a waste battery discharge and electrolyte recycling device provided by this utility model at the discharge station.

[0022] Figure 3 This is a three-dimensional structural diagram of a waste battery discharge and electrolyte recycling device provided by this utility model in the heating station.

[0023] Figure 4 This is a front view of a waste battery discharge and electrolyte recycling device provided by this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] Equipment for discharging and recycling waste batteries;

[0026] Heater, 11-first heating end, 12-second heating end, 13-heat source;

[0027] Negative pressure recovery unit, 21-suction pipe, 22-condensation device, 221-first condenser pipe, 222-second condenser pipe, 223-recovery tank, 23-vacuum pump;

[0028] Discharge device, 31-positive terminal, 32-negative terminal, 33-discharge resistor;

[0029] 40 - Workstation switching platform, 50 - Used battery, 51 - Positive terminal, 52 - Negative terminal, 53 - Safety valve. Detailed Implementation

[0030] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0031] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] See Figure 1-4 This is a three-dimensional structural diagram of a waste battery discharge and electrolyte recycling device 100 and a waste battery 50 adapted to be recycled by the recycling device 100, provided by the present invention.

[0034] like Figure 1 The diagram shows a three-dimensional structural schematic of a waste battery 50 applicable to the waste battery discharge and electrolyte recovery equipment 100 provided by this invention. The waste battery 50 has a casing, with a positive electrode 51 and a negative electrode 52 located on one side of the casing. A safety valve 53 is located between the positive electrode 51 and the negative electrode 52. The heater 10 in the waste battery discharge and electrolyte recovery equipment 100 provided by this invention is directly connected to the positive electrode 51 and the negative electrode 52 of the waste battery 50 to conduct heat, allowing heat to directly reach the current collector inside the casing of the waste battery 50. The current collector heats the electrolyte inside the waste battery 50, resulting in more uniform and faster heating of the electrolyte.

[0035] like Figure 2-4 The figure shown is a three-dimensional structural diagram of the waste battery discharge and electrolyte recycling equipment 100 provided by this utility model.

[0036] The waste battery discharge and electrolyte recovery equipment 100 provided by this utility model includes a discharger 30 disposed at the discharge station, a heater 10 disposed at the heating station, and a negative pressure recovery device 20. The discharger 30 is used to discharge the waste battery 50 that requires electrolyte recovery, ensuring that the waste battery 50 is fully discharged when it is in the heating station, thus guaranteeing the safety of electrolyte recovery. The discharger 30 is used before heating the waste battery 50 to reduce the charge in the waste battery 50 to a safe level. The heater 10 includes a heat source 13, a first heating end 11 and a second heating end 12 connected to the heat source 13 for heat conduction; when the waste battery 50 is in the heating station, the first heating end 11 is thermally connected to the positive terminal 51 of the waste battery 50, and the second heating end 12 is thermally connected to the negative terminal 52 of the waste battery 50. The heat source 13 of the heater 10 can directly transfer heat to the positive electrode 51 and negative electrode 52 of the waste battery 50 through the first heating end 11 and the second heating end 12, and then transfer it to the positive current collector inside the waste battery 50 through the positive electrode 51, and to the negative current collector inside the waste battery 50 through the negative electrode 52. This heating method, which directly conducts heat to the current collector through the electrode, has higher heating efficiency and a shorter time to heat to the preset temperature. In this embodiment, the heat source 13 of the heater 10 is a heat-conducting oil pipe. Furthermore, the heater 10 provided by this utility model also includes a heat-insulating sleeve (not shown in the figure) disposed at the heating station and fitted over the waste battery 50. When the used battery 50 is placed in the heating station, an insulation sleeve can be placed over the used battery 50. The insulation sleeve serves two purposes: firstly, to keep the used battery 50 warm so as to quickly raise the internal temperature of the used battery 50; secondly, to wrap the used battery 50 and isolate it from the outside during the heating stage and electrolyte extraction process, thereby improving the safety factor and reducing safety hazards.

[0037] like Figure 3The diagram shows a three-dimensional structural schematic of the waste battery discharge and electrolyte recovery equipment 100 provided by this utility model in the heating position. At the heating position, the heater 10 provides heating to the waste battery 50 and covers it with the aforementioned insulation sleeve during the heating process. The heater 10 provides different temperatures to the waste battery 50 according to different operating conditions. The heating temperature of the heater 10 is controlled between 100℃ and 150℃. When the detected temperature of the waste battery 50 is below 100℃, the temperature of the waste battery 50 cannot reach the temperature suitable for extraction. Therefore, the heater 10 rapidly heats the waste battery 50 at a first temperature. This first temperature is generally controlled between 100℃ and 135℃. This first temperature is determined by the operating temperature of the recycling environment; generally, the lower the operating temperature, the higher the first temperature, so that the waste battery can quickly heat up to meet the electrolyte extraction standard. When the detected temperature of the waste battery 50 is between 100℃ and 150℃, the negative pressure recovery unit 20 draws in the electrolyte. The temperature of the waste battery 50 will decrease as the electrolyte is drawn in. To maintain the temperature of the waste battery 50 between 100℃ and 150℃, the heating temperature of the heater 10 needs to be increased compared to the first heating state. At this time, the heater 10 heats at a second temperature. This second temperature is generally controlled between 130℃ and 150℃, which is higher than the first temperature and generally 10℃ to 50℃ higher than the first temperature. This compensates for the heat lost due to the rapid drawing in by the negative pressure recovery unit 20, ensuring that the temperature of the waste battery remains between 100℃ and 150℃ during the electrolyte drawing process.

[0038] like Figure 3 As shown, the negative pressure recovery unit 20 located at the heating station includes a suction pipe 21, a condensation device 22 connected to the suction pipe 21, and a vacuum pump 23 that provides suction pressure to the suction pipe 21. The vacuum pump 23 provides power to the entire negative pressure recovery unit 20, facilitating the rapid discharge of electrolyte from the waste battery 50. The condensation device 22 is used to condense the vaporized electrolyte extracted from the waste battery 50, thereby re-condensing the vaporized electrolyte into a liquid solvent, which is then collected. When the waste battery 50 is in the heating station, the suction pipe 21 is inserted into the safety valve 53 of the waste battery 50. The vacuum pump 23 provides negative pressure suction to the suction pipe 21, allowing the heated and vaporized electrolyte in the waste battery 50 to enter the suction pipe 21 through the safety valve 53 and then into the condensation device 22.

[0039] Specifically, in the waste battery discharge and electrolyte recovery equipment 100 provided by this utility model, the condensation device 22 of the negative pressure recovery unit 20 includes a first condenser tube 221 connected to the suction tube 21. The first condenser tube 221 performs the first condensation of the electrolyte extracted from the waste battery 50 by the suction tube 21. During the first condensation of the electrolyte, the condensation temperature of the first condenser tube 221 is 5℃-15℃. When the electrolyte, heated and vaporized at high temperature, is guided into the condensation device 22 by the suction tube 21 of the negative pressure recovery unit 20, it enters the first condenser tube 221 within the condensation device 22 for the first condensation and recovery. In the first condenser tube 221, the high-temperature electrolyte undergoes the first condensation operation. The temperature within the first condenser tube 221 is set between 5℃ and 15℃, enabling the first condensation and recovery of the high-temperature vaporized electrolyte. The first condenser tube 221 collects the condensed electrolyte into a recovery tank 223 for storage.

[0040] Specifically, in the waste battery discharge and electrolyte recovery equipment 100 provided by this utility model, the condensation device 22 of the negative pressure recovery unit 20 further includes a second condensation tube 222 connected to the first condensation tube 221. The function of the second condensation tube 222 is to perform a second condensation operation on the electrolyte after the first condensation, ensuring that as much of the high-temperature electrolyte as possible can be recovered and reused. After the electrolyte of the waste battery 50 passes through the first condensation tube 221 of the condensation device 22, it enters the second condensation tube 222 for a second condensation, and the electrolyte is collected and collected into the recovery tank 223. The vaporized electrolyte that has not been condensed after passing through the first condensation tube 221 will enter the second condensation tube 222 under the action of the vacuum pump 23 of the negative pressure recovery unit 20, and undergo a second condensation and recovery in the second condensation tube 222. In the second condenser 222, the vaporized electrolyte undergoes a second condensation operation after cooling. The temperature inside the second condenser 222 is set between -10℃ and 0℃, enabling the second condensation and recovery of the cooled electrolyte. The second condenser 222 collects the condensed electrolyte into a recovery tank 223 for storage. After passing through the first condenser 221 and the second condenser 222, most of the vaporized electrolyte discharged from the waste battery 50 will be condensed and recovered.

[0041] Specifically, in the waste battery discharge and electrolyte recovery equipment 100 provided by this utility model, the condensation device 22 of the negative pressure recovery unit 20 further includes a recovery tank 223, such as... Figure 2-3As shown, the recovery tank includes a tank body, a first recovery pipe connecting a first condenser 221 to the tank body, and a second recovery pipe connecting a second condenser 222 to the tank body. The tank body is located on the side of the first condenser 221 and the second condenser 222. When the first condenser 221 and the second condenser 222 are connected in series, the first condenser 221 transfers the condensed solution to the recovery tank 223 through the first recovery pipe, while the partially condensed electrolyte is transferred to the second condenser 222 by the vacuum pump 23. The condensed solution in the second condenser 222 is then transferred to the recovery pipe 223 through the second recovery pipe, achieving liquid recovery through two condensations. The first condenser 221 performs the first condensation operation on the vaporized electrolyte, and the second condenser 222 performs the second condensation operation on the vaporized electrolyte. The electrolyte solvent condensed after these two condensation operations enters the recovery tank 223.

[0042] like Figure 2 As shown, in the waste battery discharge and electrolyte recovery equipment 100 provided by this utility model, the vacuum pump 23 of the negative pressure recovery unit 20 provides suction pressure for the entire negative pressure recovery unit 20. The negative pressure recovery unit 20 provides different pressures depending on the heating state. The pressure of the vacuum pump 23 is 10-45 kPa, and the vacuum pump 23 is fixedly connected to the condensation device 22, providing suction pressure for the condensation device 22. When the temperature of the waste battery is less than 100°C, the negative pressure recovery unit 20 does not suction the electrolyte of the waste battery 50, and the vacuum pump 23 does not work at this time. When the temperature of the used battery 50 is between 100℃ and 150℃, the negative pressure recovery unit 20 draws in the electrolyte from the used battery 50 at a first pressure. At this time, the vacuum pump 23 provides suction to the condensation device 22 at a first pressure between 35-45 kPa. This first pressure is adjusted according to the temperature of the used battery 50; the higher the temperature, the lower the pressure. That is, when the detected temperature of the used battery 50 is 100℃, the first pressure is 45 kPa, and when the detected temperature of the used battery 50 is 150℃, the first pressure is 35 kPa. This first pressure provides sufficient pressure inside the used battery 50, allowing the vaporized electrolyte inside to be quickly discharged. When the temperature of the waste battery 50 is greater than 150°C, the negative pressure recovery unit 20 uses a second pressure to draw the electrolyte from the waste battery 50. At this time, the vacuum pump 23 provides suction to the condensation device 22 using a second pressure. This second pressure is between 10-30 kPa, and as the temperature of the waste battery 50 increases, the second pressure gradually decreases.

[0043] like Figure 2The diagram shows a three-dimensional structural schematic of the waste battery discharge and electrolyte recovery equipment 100 in the discharge position. The discharger 30 is used to discharge the waste batteries 50 that require electrolyte recovery, ensuring that the waste batteries 50 are fully discharged when in the heating position, thus guaranteeing the safety of electrolyte recovery. The discharger 30 is used before heating the waste batteries 50 to reduce the charge within them to a safe level.

[0044] like Figure 4 As shown, the discharger 30 includes a discharge resistor 33, a positive terminal 31 electrically connected to the discharge resistor 33, and a negative terminal 32. When the used battery 50 is in the discharge position, the positive terminal 31 is electrically connected to the positive terminal 51 of the used battery 50, and the negative terminal 32 is electrically connected to the negative terminal 52 of the used battery 50. Figure 4 As shown, the positive terminal 31 and negative terminal 32 of the discharger 30 are electrically connected to the positive terminal 51 and negative terminal 52 of the waste battery 50, respectively, to form a discharge circuit. During the discharge process, the discharge resistor 33 continuously heats up.

[0045] Furthermore, such as Figure 2 or Figure 3 As shown, the discharge resistor 33 of the discharger 30 is in contact with the heat source 13 of the heater 10. When the waste battery 50 is in the discharge position, the discharge resistor 33 generates heat during the discharge process of the waste battery 50, and the heat source 13 of the heater 10 absorbs the heat generated by the discharge resistor 33.

[0046] Furthermore, such as Figure 2 or Figure 3 As shown, the waste battery discharge and electrolyte recycling equipment 100 provided by this utility model also includes a station switching platform 40 that supports the waste battery 50 and moves the waste battery 50 between the discharge station and the heating station. The station switching platform 40 is used for switching the waste battery 50 between different stations to facilitate the rapid and efficient recycling of the electrolyte from the waste battery 50.

[0047] The waste battery discharge and electrolyte recovery equipment 100 provided by this utility model is used to recover electrolyte from bare batteries. First, the bare batteries are discharged, then heated to 130°C for 1 hour and 31 minutes. After heating, the electrolyte is drawn from the bare batteries, a process that takes 3 hours and 54 minutes. The weight loss of the bare batteries after electrolyte drawing and the weight of the electrolyte solvent after drawing are 24 grams. During this electrolyte recovery process, no insulation jacket was added to the bare batteries during either the heating or recovery process. Furthermore, the condensation device 22 only includes a first condenser pipe 221 connected to the suction pipe 21, meaning that only one condensation operation is performed on the drawn electrolyte.

[0048] The waste battery discharge and electrolyte recovery equipment 100 provided by this utility model is used to recover electrolyte from bare batteries. First, the bare batteries are discharged, then heated, with an insulation jacket installed during both the heating and suction processes. The bare batteries are heated to 121°C in 1 hour and 15 minutes, and the entire electrolyte suction process takes 3 hours and 20 minutes. The weight loss of the bare batteries after electrolyte suction and the weight of the electrolyte solvent after suction differ by 32 grams. In this electrolyte recovery process, the condensation device 22 only includes a first condenser pipe 221 connected to the suction pipe 21, meaning that only one condensation operation is performed on the suction electrolyte.

[0049] The waste battery discharge and electrolyte recovery equipment 100 provided by this utility model is used to recover electrolyte from bare batteries. First, the bare batteries are discharged, then heated, with an insulation jacket installed during both the heating and suction processes. The bare batteries are heated to 128°C in 1 hour and 22 minutes, and the entire electrolyte suction process takes 2 hours and 45 minutes. The weight loss of the bare batteries after electrolyte suction and the weight of the electrolyte solvent after suction differ by 38 grams. In this electrolyte recovery process, the condensation device 22 only includes a first condenser pipe 221 connected to the suction pipe 21, meaning that only one condensation operation is performed on the suction electrolyte.

[0050] In the above three processes of bare battery electrolyte recovery, it is clear that adding an insulation jacket during the heating and suction of waste battery 50 can effectively shorten the heating and suction time, thereby improving the electrolyte recovery efficiency. Simultaneously, the higher the heating and suction temperature of the waste battery, the lower the recovery rate. This is because after the electrolyte is heated to a high temperature, only one condensation operation is performed, failing to fully condense the vaporized electrolyte. This results in a significant difference in weight between the bare battery after suction and the electrolyte solvent weight. Therefore, performing a second condensation operation after the first condensation will significantly reduce the difference in weight between the bare battery after suction and the electrolyte solvent weight, thus improving the electrolyte recovery rate.

[0051] The first heating end 11 of the heater 10 of the waste battery discharge and electrolyte recycling device 100 provided by this utility model is directly thermally connected to the positive electrode post 51 of the waste battery 50, so that the positive electrode post 51 can directly transfer heat to the positive current collector. The second heating end 12 of the heater 10 is directly thermally connected to the negative electrode post 52 of the waste battery 50, so that the negative electrode post 52 can directly transfer heat to the negative current collector. This quickly heats the current collector inside the waste battery 50 and ensures that the heating inside the waste battery 50 is more uniform and the electrolyte vaporization is faster and more uniform.

[0052] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A device for discharging and recycling electrolyte from waste batteries, characterized in that, include: The discharger is installed at the discharge station to discharge used batteries; A heater, disposed at a heating station, includes a heat source, a first heating end and a second heating end connected to the heat source for heat conduction; when the waste battery is in the heating station, the first heating end is thermally connected to the positive terminal of the waste battery, and the second heating end is thermally connected to the negative terminal of the waste battery. A negative pressure recovery unit is installed at the heating station, including a suction pipe, a condensation device connected to the suction pipe, and a vacuum pump that provides suction pressure to the suction pipe. When the waste battery is in the heating station, the suction pipe is inserted into the safety valve of the waste battery.

2. The discharge and electrolyte recovery equipment for waste batteries as described in claim 1, characterized in that, The discharger includes a discharge resistor, a positive terminal and a negative terminal electrically connected to the discharge resistor. When the waste battery is in the discharge position, the positive terminal is electrically connected to the positive terminal of the waste battery, and the negative terminal is electrically connected to the negative terminal of the waste battery.

3. The discharge and electrolyte recovery equipment for waste batteries as described in claim 2, characterized in that, The discharge resistor of the discharger is in contact with the heat source of the heater, and the heat source absorbs the heat generated by the discharge resistor.

4. The discharge and electrolyte recovery equipment for waste batteries as described in claim 2, characterized in that, It also includes a station switching platform that supports the waste batteries and moves them between the discharge station and the heating station.

5. The discharge and electrolyte recovery equipment for waste batteries as described in claim 1, characterized in that, The condensation device of the negative pressure recovery unit includes a first condenser tube connected to the suction tube, and the condensation temperature of the first condenser tube is 5℃-15℃.

6. The discharge and electrolyte recovery equipment for waste batteries as described in claim 5, characterized in that, The condensation device of the negative pressure recovery unit also includes a second condenser connected to the first condenser, the second condenser having a condensation temperature of -10℃ to 0℃.

7. The discharge and electrolyte recovery equipment for waste batteries as described in claim 6, characterized in that, The condensation device of the negative pressure recovery unit also includes a recovery tank, which includes a tank body, a first recovery pipe connecting the first condenser pipe to the tank body, and a second recovery pipe connecting the second condenser pipe to the tank body.

8. The discharge and electrolyte recovery equipment for waste batteries as described in claim 1, characterized in that, The vacuum pump has a pressure of 10-45 kPa and is fixedly connected to the condensation device.

9. The discharge and electrolyte recovery equipment for waste batteries as described in claim 1, characterized in that, The heating temperature of the heater is 100℃-150℃.

10. The discharge and electrolyte recovery equipment for waste batteries as described in claim 1, characterized in that, The heater also includes an insulation sleeve that is installed on the heating station and covered outside the waste battery.

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