Power battery electrolyte recovery system

Abstract

The embodiment of the utility model provides a power battery electrolyte recovery system which comprises a leaching mechanism used for leaching power battery powder to obtain electrolyte containing leacheate; the electrolyte extraction mechanism is communicated with the leaching mechanism so as to obtain electrolyte containing leacheate; the electrolyte extraction mechanism comprises multiple stages of extraction units and back extraction units arranged at the lower stages of the extraction units; the extraction unit is used for adding an extraction liquid to purify the electrolyte; and the back extraction unit is used for extracting the extraction liquid from the electrolyte containing the extraction liquid and conveying the electrolyte for extracting the extraction liquid to the post-stage extraction unit or outputting the electrolyte. By adopting the design that the leaching mechanism is combined with the multi-stage extraction and back extraction unit, the electrolyte component can be effectively separated and purified from the waste battery powder, and the recovery rate of the electrolyte is greatly improved.

Description

Technical Field

[0001] This disclosure relates to the field of power battery technology, and in particular to a power battery electrolyte recovery system. Background Technology

[0002] With increasing global awareness of environmental protection and the rapid development of the new energy vehicle market, the demand for electric vehicles is rising year by year. As one of the core components of electric vehicles, the use of power batteries is also increasing. However, at the end of their service life, power lithium batteries generate a large number of waste batteries. If not properly disposed of, this will not only waste resources but may also cause serious environmental pollution. In particular, the electrolyte in power batteries contains various harmful substances such as heavy metals and organic solvents, and improper disposal may lead to soil and water pollution.

[0003] Currently, the main methods for treating spent power batteries include physical, thermal, and chemical methods. While these methods can recover some valuable materials to a certain extent, they still have significant shortcomings in electrolyte recovery: traditional physical methods mainly separate the battery components through mechanical disassembly. Although this method is simple and direct, it has low electrolyte recovery efficiency and is prone to leakage, causing secondary pollution. Thermal methods treat spent batteries through high-temperature combustion or melting. This method can effectively reduce the volume of solid waste, but it releases toxic gases and cannot effectively recover the electrolyte. Chemical methods include acid-base leaching and precipitation processes to recover metal elements from the battery. However, this method usually requires large amounts of chemical reagents, resulting in high costs, and also generates new wastewater and waste residue problems; improper handling can also harm the environment. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this disclosure is to provide a power battery electrolyte recovery system to solve the problems in the related technology.

[0005] The first aspect of this disclosure provides a power battery electrolyte recovery system, comprising:

[0006] A rinsing mechanism is used to rinse power battery powder to obtain an electrolyte containing rinsing solution;

[0007] An electrolyte extraction mechanism is provided, which is connected to the rinsing mechanism to obtain an electrolyte containing rinsing solution. The electrolyte extraction mechanism includes multiple extraction units and a back-extraction unit located below each extraction unit. The extraction units are used to add extractant to purify the electrolyte. The back-extraction units are used to extract extractant from the electrolyte containing extractant and to transport the extracted electrolyte to a subsequent extraction unit or output it.

[0008] In the first aspect of the embodiment, the extraction unit and the back-extraction unit employ the following extractor structure, the extractor structure comprising:

[0009] The reaction chambers are arranged from top to bottom, and are separated and connected by partitions with connecting holes; the first-stage reaction chamber is connected to the inlet for feeding.

[0010] A first output pipe and a second output pipe are connected to each stage of the reaction chamber. The first output pipe is used to output the light phase liquid separated in each stage of the reaction chamber, and the second output pipe is connected to the next stage extraction unit or back-extraction unit to output the heavy phase liquid.

[0011] In the first aspect of the embodiment, the electrolyte extraction mechanism further includes multiple extraction centrifugation mechanisms, each extraction centrifugation mechanism including an extraction centrifugation motor and an extraction centrifugation shaft connected to the extraction centrifugation motor. The extraction centrifugation shaft is located in the multi-stage reaction chamber and is used to centrifuge the input solution to separate the light phase liquid and the heavy phase liquid.

[0012] In an embodiment of the first aspect, the electrolyte extraction mechanism further includes an electrolyte collection unit connected to a second output pipe of the last-stage back-extraction unit for collecting the purified electrolyte.

[0013] In an embodiment of the first aspect, the electrolyte extraction mechanism further includes a rinsing fluid circulation unit, which is connected to the first output pipe of the extraction unit and the rinsing mechanism, for collecting the rinsing fluid in the extracted electrolyte and transporting it to the rinsing mechanism.

[0014] In an embodiment of the first aspect, the electrolyte extraction mechanism further includes an extractant recovery unit, which connects the first output pipe of the back-extraction unit and the input pipe of the extraction unit, for collecting the extractant in the electrolyte after back-extraction and conveying it to the extraction unit.

[0015] In a first aspect embodiment, the rinsing mechanism includes:

[0016] A multi-layered screening section with gradient settings is used to screen the pulverized battery fragments;

[0017] A spraying element provided to the screening section is used to spray a washing solution to wash the pulverized battery fragments, thereby obtaining an electrolyte containing the washing solution and solid-phase battery fragments.

[0018] In an embodiment of the first aspect, the spray element includes a plurality of pressurizing balls disposed within the cavity of the spray head;

[0019] And / or, the spray head of the spraying component is a rotatable spray head to cover the screening section.

[0020] In an embodiment of the first aspect, a crushing mechanism is further included, connected to the washing mechanism via a conveying channel, for crushing the power battery to form the power battery powder and conveying it to the washing mechanism.

[0021] In an embodiment of the first aspect, the rinsing mechanism further includes a solid phase output port for discharging battery fragments; the power battery electrolyte recovery system further includes a collection mechanism connected to the solid phase output port for collecting the battery fragments.

[0022] The beneficial effects of this disclosure are as follows: The design, combining a rinsing mechanism with multi-stage extraction and back-extraction units, effectively separates and purifies electrolyte components from waste battery powder, significantly improving electrolyte recovery rate. Compared to traditional methods, this system can significantly reduce electrolyte loss while ensuring high-purity electrolyte recovery. Simultaneously, the back-extraction unit is used to extract and recover the extract. This allows the extract to be recycled, further reducing processing costs and promoting the effective recycling of resources. Attached Figure Description

[0023] Figure 1 A schematic diagram of a power battery electrolyte recovery system is shown in one embodiment of this disclosure.

[0024] Figure 2 This illustration shows a schematic diagram of the electrolyte extraction mechanism in a power battery electrolyte recovery system according to an embodiment of the present disclosure.

[0025] Figure 3 This diagram shows a cross-sectional view of an electrolyte extraction mechanism in a power battery electrolyte recovery system according to an embodiment of the present disclosure.

[0026] Figure 4 This diagram shows a cross-sectional view of the extractor structure in a power battery electrolyte recovery system according to an embodiment of the present disclosure.

[0027] Figure 5 This illustration shows a structural schematic diagram of a rinsing mechanism in a power battery electrolyte recovery system according to an embodiment of the present disclosure.

[0028] Figure 6 This illustration shows a cross-sectional schematic diagram of a rinsing mechanism in a power battery electrolyte recovery system according to an embodiment of the present disclosure.

[0029] Figure 7 The image shows a front view of a rinsing mechanism in a power battery electrolyte recovery system according to an embodiment of the present disclosure.

[0030] Figure 8 This illustration shows a cross-sectional schematic diagram of a spray component in a power battery electrolyte recovery system according to an embodiment of the present disclosure.

[0031] Figure 9 Demonstrating an embodiment of this disclosure along Figure 8 A sectional view with the center section line BB.

[0032] Figure 10 This illustration shows a schematic diagram of the pulverizing and centrifuging mechanism in a power battery electrolyte recovery system according to an embodiment of the present disclosure. Detailed Implementation

[0033] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the information disclosed herein. This disclosure can also be implemented or applied through other different specific embodiments, and various details in this disclosure can be modified or changed according to different viewpoints and application modules without departing from the spirit of this disclosure. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this disclosure can be combined with each other.

[0034] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings, so that those skilled in the art to which this disclosure pertains can readily implement it. This disclosure may be embodied in many different forms and is not limited to the embodiments described herein.

[0035] In this disclosure, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic represented in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in any one or a group of embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples represented in this disclosure, as well as the features of those different embodiments or examples.

[0036] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this disclosure, "a set" means two or more, unless otherwise explicitly specified.

[0037] For the purpose of clarity, devices unrelated to the description are omitted, and the same or similar components throughout the specification are given the same reference numerals.

[0038] Throughout this specification, when it is said that a device is "connected" to another device, this includes not only "direct connection" but also "indirect connection" by placing other components in between. Furthermore, when it is said that a device "comprises" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather implies that other constituent elements may be included.

[0039] While the terms first, second, etc., are used in some examples herein to refer to various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, first interface and second interface, etc., are used. Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of features, steps, operations, elements, modules, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, modules, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition will only occur if the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0040] The technical terms used herein are for reference only to specific embodiments and are not intended to limit the scope of this disclosure. The singular form used herein includes the plural form unless the statement explicitly indicates otherwise. The word "comprising" as used in this specification means to specify a particular characteristic, region, integer, step, operation, element, and / or component, and does not exclude the presence or addition of other characteristics, regions, integers, steps, operations, elements, and / or components.

[0041] Although not explicitly defined, all terms, including technical and scientific terms used herein, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Terms defined in commonly used dictionaries shall be further interpreted as having a meaning consistent with the relevant technical literature and the message of the present disclosure, and shall not be over-interpreted as having an ideal or overly formulaic meaning unless otherwise defined.

[0042] In the treatment of electrolytes from spent power batteries, relevant technologies include physical dismantling, thermal treatment, and chemical treatment. However, all of these methods have limited effectiveness in electrolyte recovery. Physical dismantling struggles to completely separate the electrolyte, thermal treatment can cause electrolyte decomposition or volatilization due to high temperatures, and while chemical methods can partially recover the electrolyte, the process is complex and costly. Regardless of the method, secondary pollution problems are possible. For example, physical dismantling may lead to electrolyte leakage, thermal treatment generates harmful gases, and chemical methods require large amounts of chemical reagents and produce wastewater and waste residue, all of which pose serious threats to the environment. Due to low recovery efficiency, many valuable electrolyte components cannot be effectively recovered, leading to resource waste and increasing the cost burden on the new energy vehicle industry.

[0043] To address the aforementioned issues, one embodiment of this disclosure provides a power battery electrolyte recovery system. This system employs a rinsing mechanism to wash power battery powder, effectively extracting electrolyte containing the rinsing solution from spent batteries. Subsequently, a multi-stage extraction unit is used to progressively purify the electrolyte, ensuring efficient recovery. By designing a back-extraction unit, an extractant is extracted from the electrolyte containing the extractant, and the treated electrolyte is transported to a subsequent extraction unit or output, reducing the use of chemical reagents and waste emissions, thus lowering the risk of environmental pollution.

[0044] exist Figure 1 In this embodiment, the power battery electrolyte recovery system includes a rinsing mechanism 100 and an electrolyte extraction mechanism 200.

[0045] The rinsing unit 100 is used to rinse the power battery powder to obtain an electrolyte containing rinsing solution.

[0046] An electrolyte extraction mechanism 200 is connected to the rinsing mechanism 100 to obtain an electrolyte containing rinsing solution. The electrolyte extraction mechanism 200 includes multiple extraction units 210 and a back-extraction unit 220 disposed below each extraction unit 210. The extraction unit 210 is used to add extractant to purify the electrolyte. The back-extraction unit 220 is used to extract extractant from the electrolyte containing extractant and to transport the electrolyte containing extractant to the subsequent extraction unit 210 or output it.

[0047] Specifically, the main function of the rinsing mechanism 100 is to wash the pulverized power battery powder by spraying rinsing fluid, thereby separating the electrolyte containing the rinsing fluid and the solid-phase battery fragments. The electrolyte extraction mechanism 200 receives the electrolyte containing the rinsing fluid from the rinsing mechanism 100 and gradually purifies the electrolyte through a multi-stage extraction unit 210 and a back-extraction unit 220, ultimately outputting a high-purity electrolyte product. (Refer to...) Figure 2In this embodiment, by adding a specific extractant in extraction unit 210, impurities in the electrolyte can be effectively separated. Each extraction unit 210 employs a stepwise purification method to ensure that the purity of the electrolyte increases progressively. The function of back-extraction unit 220 is to separate the extractant from the electrolyte containing the extractant, further purifying the electrolyte. In this way, not only are impurities in the electrolyte removed, but the impact of extractant residue on the electrolyte purity is also effectively reduced. The extractant is typically a relatively expensive solvent with specific chemical properties. By extracting the extractant from the electrolyte through back-extraction unit 220 and reusing it in the next extraction process, the extractant is recycled, thereby significantly reducing processing costs.

[0048] Optionally, in Figure 3 In the embodiment, the extraction unit 210 and the back-extraction unit 220 adopt the following extractor structure, which includes: a multi-stage reaction chamber 201, an inlet 2011, a first output pipe 2012 and a second output pipe 2013.

[0049] The multi-stage reaction chambers 201 are arranged from top to bottom, and the multi-stage reaction chambers 201 are separated and connected by a partition with a connecting hole; the first-stage reaction chamber 201 is connected to the inlet 2011 for feeding.

[0050] A first output pipe 2012 and a second output pipe 2013 are connected to each stage of the reaction chamber 201. The first output pipe 2012 is used to output the light phase liquid separated in each stage of the reaction chamber 201, and the second output pipe 2013 is connected to the next stage extraction unit 210 or back-extraction unit 220 to output the heavy phase liquid.

[0051] Specifically, in the extractor structure used in the extraction unit 210, the inlet 2011 is used to input the extractant, and in some embodiments, the inlet 2011 of the first-stage reaction chamber 201 is also used to input the electrolyte containing the eluent. Figure 3 In this embodiment, two inlet ports 2011 are provided in the first-stage reaction chamber 201 of the extraction unit 210 for ease of understanding. The first-stage reaction chamber 201 receives both the electrolyte containing the eluent and the extractant. In some embodiments, the two inlet ports 2011 may also receive the electrolyte containing the eluent and the extractant, respectively, into the first-stage reaction chamber 201.

[0052] In some embodiments, the multi-stage reaction chamber 201 design allows for preliminary separation and purification operations within each stage of the reaction chamber 201. Within each stage of the reaction chamber 201, the two liquid phases separate due to density differences. The lighter phase (such as the eluent in the extraction unit 210) flows out through a first pipe, while the heavier phase (such as the electrolyte containing the extractant or the electrolyte after back-extraction) enters the next stage through a second pipe. The lighter phase liquid separated in the extraction unit 210 is the eluent, and the heavier phase liquid is the electrolyte containing the extractant; the lighter phase liquid separated in the back-extraction unit 220 is the extractant, and the heavier phase liquid is the electrolyte. The lighter phase liquid is collected from each stage of the reaction chamber 201 through a first output pipe 2012 and ultimately collected in a storage tank for subsequent processing or direct recycling. This stage-by-stage separation reduces impurity entrainment and improves product purity.

[0053] Optionally, in Figure 3 In this embodiment, each extractor structure may be configured with a corresponding extraction centrifugation mechanism 260. That is, the electrolyte extraction mechanism 200 further includes multiple extraction centrifugation mechanisms 260, which are respectively disposed in each extraction unit 210 and back-extraction unit 220. The extraction centrifugation mechanism 260 includes an extraction centrifugation motor 261 and an extraction centrifugation shaft 260 connected to the extraction centrifugation motor 261. The extraction centrifugation shaft 260 is located in the multi-stage reaction chamber 201 and is used to centrifuge the input solution to separate the light phase liquid and the heavy phase liquid.

[0054] Specifically, in some embodiments, the extraction centrifuge motor 261 is the power source driving the entire centrifugation process, typically employing a high-efficiency, energy-saving motor to ensure stable system operation. Centrifugal separation utilizes the powerful centrifugal force generated by high-speed rotation to rapidly separate two phases with different densities. The lighter phase liquid is closer to the center of the shaft, while the heavier phase liquid is thrown outwards. In some embodiments, the lighter phase liquid is located in the upper layer of the reaction chamber 201, and the heavier phase liquid is located in the lower layer of the reaction chamber 201. The reason for collecting the liquid from each stage of the reaction chamber 201 is that although some of the heavier phase liquid will sink to the bottom reaction chamber 201 due to gravity, some will still be distributed in the lower layer of each stage of the reaction chamber 201. Therefore, it is necessary to extract both the heavier and lighter phase liquids from each stage of the reaction chamber 201.

[0055] exist Figure 4In this embodiment, the electrolyte extraction mechanism 200 further includes an extraction transfer pump 2014 and an extraction-re-extraction device control console 2015. The extraction transfer pump 2014 is used to extract the heavy phase liquid from the reaction chamber 201 and deliver it to the next-stage extraction unit 210 or the re-extraction unit 220 via a second output pipe 2013. The extraction-re-extraction device control console 2015 is used to control the extraction centrifugal motor 261 and the extraction transfer pump 2014, thereby controlling the extraction and re-extraction processes in the electrolyte extraction mechanism 200.

[0056] Optionally, in Figure 4 In this embodiment, the electrolyte extraction mechanism 200 further includes an electrolyte collection unit 230, which is connected to the second output pipe 2013 of the last stage back-extraction unit 220 and is used to collect the purified electrolyte.

[0057] Specifically, in some embodiments, the electrolyte containing the rinsing solution output by the rinsing mechanism 100 enters the electrolyte collection unit 230 after extraction and back-extraction. When the purity of the electrolyte in the electrolyte collection unit 230 is sufficient, it can be output. When the purity of the electrolyte is insufficient, the electrolyte in the electrolyte collection unit 230 is drawn back into the rinsing mechanism 100 for rinsing, extraction and back-extraction again.

[0058] Optionally, in Figure 4 In this embodiment, the electrolyte extraction mechanism 200 further includes a rinsing liquid circulation unit 240, which is connected to the first output pipe 2012 of the extraction unit 210 and the rinsing mechanism 100, for collecting the rinsing liquid in the extracted electrolyte and transporting it to the rinsing mechanism 100.

[0059] Specifically, in some embodiments, the pre-treated rinsing solution is collected from the first output pipe 2012 and recycled to the rinsing mechanism 100 for a new round of power battery powder rinsing operations. By recycling the rinsing solution, the demand for new rinsing solution is reduced, thereby saving water resources and the consumption of other chemical reagents, and avoiding operational interruptions caused by frequent replacement or replenishment of new rinsing solution.

[0060] Optionally, in Figure 4 In this embodiment, the electrolyte extraction mechanism 200 further includes an extract recovery unit 250, which connects the first output pipe 2012 of the back-extraction unit 220 and the input pipe of the extraction unit 210, for collecting the extractant in the electrolyte after back-extraction and transporting it to the extraction unit 210.

[0061] Specifically, in some embodiments, the collected extractant is returned to extraction unit 210 for a new round of extraction of the power battery powder electrolyte. By recycling the extractant, the demand for new extractant is reduced, thereby saving on expensive chemical reagent consumption.

[0062] Optionally, please refer to the following as well. Figures 5-7 In one embodiment, the rinsing mechanism 100 includes a multi-layer screening section 1011 and a spraying component 110.

[0063] The multi-layer screening section 1011 with gradient settings is used to screen the pulverized battery fragments.

[0064] The spray member 110 provided to the screening section 1011 is used to spray a washing solution to wash the crushed battery fragments, thereby obtaining an electrolyte containing the washing solution and solid-phase battery fragments.

[0065] Specifically, in some embodiments, the multi-layer screening section 1011 employs a sieve arrangement from coarse to fine, with the aperture of each sieve gradually decreasing to ensure that battery fragments of different particle sizes can be separated step by step. This gradient setting not only improves screening efficiency but also reduces the possibility of clogging, ensuring continuous operation of the system. The multi-layer screening section 101 isolates multi-layer washing chambers 101. After the battery fragments enter the washing chambers 101 through the washing inlet 102, under the influence of gravity and the impact of the washing liquid, smaller solids fall through the sieves step by step into the next washing chamber 101. High-pressure washing liquid is evenly sprayed onto the screened battery powder through a spray head, ensuring sufficient contact and dissolution of the electrolyte components. Finally, the electrolyte containing the washing liquid is transported to the extraction unit 210 through the washing outlet 104. The washing mechanism 100 also includes a solid output port 103 for outputting battery fragments. The roller motor 120 in the washing mechanism 100 accelerates the mixing between the battery fragments and the washing liquid.

[0066] Optionally, in Figure 8 In the embodiment, the spray component 110 includes a plurality of pressure-boosting balls 111 disposed in the cavity of the spray head, so that a pressure difference is generated when the water flows through the pressure-boosting balls 111, thereby increasing the spray hydraulic pressure. Using this pressure, the water flow can be enhanced under the condition of equal water flow.

[0067] Optionally, in Figure 9In some embodiments, the spray head of the spray element 110 is a rotatable spray head to cover the screening section 1011. In some embodiments, the spray nozzle 112 of the spray head adopts an opening method with a large internal hole and a small external hole. The large internal hole has a large flow rate and a single flow direction, playing the main rinsing role; the small external hole emits atomized spray liquid with strong diffusion, reducing dead corners at the spray edge. In some embodiments, the spray element 110 can be rotated under the control of the rinsing device control console 105, thereby enabling complete coverage of the rinsing chamber 101 inside the rinsing mechanism 100 without dead corners. Figure 7 In this embodiment, the rinsing mechanism 100 is also equipped with a concentration detector 106 to monitor the electrolyte concentration in the rinsing solution in real time, so as to ensure that the rinsing at each stage can achieve the best effect and avoid excessive or insufficient rinsing.

[0068] Optional, please refer to them as well. Figure 1 as well as Figure 10 In this embodiment, the power battery electrolyte recovery system further includes a pulverizing centrifugal mechanism 130, connected between the rinsing mechanism 100 and the electrolyte extraction mechanism 200. This mechanism centrifuges the electrolyte containing the rinsing solution output from the rinsing mechanism 100 to separate the electrolyte. The powerful centrifugal force generated by the high-speed rotation separates the tiny solid particles in the liquid, which are then transported to the electrolyte extraction mechanism 200 for extraction and back-extraction. The pulverizing centrifugal mechanism 130 includes a centrifugal inlet 131, a centrifugal liquid outlet 132, a centrifugal motor 133, a filter screen 134, and a centrifugal solid-phase transfer pump 135. In some embodiments, the centrifugal inlet is located at the top and connected to the rinsing outlet 104 of the rinsing mechanism 110. In some embodiments, the filter screen 134 has a pore size of 1000-10000 mesh and is mounted on the rolling wall, allowing only liquid to pass through. The centrifugal motor 133 is controlled by the rinsing device control console 105. The solid-phase transfer pump 135 of the centrifuge is used to extract the remaining metal mixed powder within the device. The liquid-phase outlet 132 of the centrifuge transfers the centrifuged electrolyte. In the pulverizing and centrifuging mechanism 130, the liquid entering from the inlet 131 of the centrifuge and a small amount of metal mixed powder are subjected to centrifugal force, wherein the electrolyte flows down through the filter screen 134 from the space between the device wall and the drum wall, and flows out through the liquid-phase outlet 132 of the centrifuge. The remaining metal mixed powder, due to its lighter mass, is extracted from the pulverizing and centrifuging mechanism 130 by the solid-phase transfer pump 135. The pulverizing and centrifuging mechanism 130 thoroughly separates the solid and liquid phases using centrifugal force, which is beneficial for subsequent extraction and back-extraction.

[0069] Optionally, in Figure 1In this embodiment, the power battery electrolyte recovery system further includes a crushing mechanism 300, which is connected to the rinsing mechanism 100 via a conveying channel, for crushing the power battery to form the power battery powder and conveying it to the rinsing mechanism 100.

[0070] Specifically, the crushing unit 300 breaks down the waste power batteries into small pieces or powder, facilitating subsequent screening, rinsing, and extraction operations. Crushing increases the surface area of ​​the battery materials, increasing the contact area with the rinsing solution and thus improving the electrolyte extraction efficiency. After crushing, the battery fragments of different particle sizes can be graded using screens and other equipment.

[0071] Optionally, in Figure 1 In this embodiment, the power battery electrolyte recovery system further includes a collection mechanism 400, which is connected to the solid phase output port 103 and is used to collect the battery fragments.

[0072] exist Figure 1 In this embodiment, the collecting mechanism 400 sequentially includes a collecting component 410, a pulse dust collector 411, a linear screen 412, a diaphragm collecting box 420, a grinder 430, a cylindrical screen 440, an electrode powder collecting box 441, and a metal collecting box 442. The collecting component 410 collects the washed solid-phase battery fragments. The pulse dust collector 411 and the linear screen 412 pre-treat the solid-phase battery fragments, whereby the pulse dust collector 411 performs airflow dust removal on the battery fragments, and the linear screen 412 removes fine impurities. The treated diaphragm material is sent to the diaphragm collecting box 420 for recycling. The sorted battery fragments enter the grinder 430 for further grinding to achieve a finer particle size. The ground fragments are transported to the cylindrical screen 440 via a conveyor belt. After sorting by the cylindrical screen 440, the battery electrode powder is sent to the electrode powder collecting box 441, while the metal fragments are sent to the metal collecting box 442.

[0073] The above embodiments are merely illustrative of the principles and effects of this disclosure and are not intended to limit this disclosure. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this disclosure. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this disclosure should still be covered by the protection scope of this disclosure.

Claims

1. A power battery electrolyte recovery system, characterized in that, include: A rinsing mechanism is used to rinse power battery powder to obtain an electrolyte containing rinsing solution; An electrolyte extraction mechanism is provided, which is connected to the rinsing mechanism to obtain an electrolyte containing rinsing solution. The electrolyte extraction mechanism includes multiple extraction units and a back-extraction unit located below each extraction unit. The extraction units are used to add extractant to purify the electrolyte. The back-extraction units are used to extract extractant from the electrolyte containing extractant and to transport the extracted electrolyte to a subsequent extraction unit or output it.

2. The power battery electrolyte recovery system according to claim 1, characterized in that, The extraction unit and the back-extraction unit employ the following extractor structure, which includes: The reaction chambers are arranged from top to bottom, and are separated and connected by partitions with connecting holes; the first-stage reaction chamber is connected to the inlet for feeding. A first output pipe and a second output pipe are connected to each stage of the reaction chamber. The first output pipe is used to output the light phase liquid separated in each stage of the reaction chamber, and the second output pipe is connected to the next stage extraction unit or back-extraction unit to output the heavy phase liquid.

3. The power battery electrolyte recovery system according to claim 2, characterized in that, The electrolyte extraction mechanism also includes multiple extraction centrifugation mechanisms. Each extraction centrifugation mechanism includes an extraction centrifugation motor and an extraction centrifugation shaft connected to the extraction centrifugation motor. The extraction centrifugation shaft is located in the multi-stage reaction chamber and is used to centrifuge the input solution to separate the light phase liquid and the heavy phase liquid.

4. The power battery electrolyte recovery system according to claim 2, characterized in that, The electrolyte extraction mechanism also includes an electrolyte collection unit, which is connected to the second output pipe of the last stage back-extraction unit and is used to collect the purified electrolyte.

5. The power battery electrolyte recovery system according to claim 2, characterized in that, The electrolyte extraction mechanism further includes a rinsing fluid circulation unit, which is connected to the first output pipe of the extraction unit and the rinsing mechanism, for collecting the rinsing fluid in the extracted electrolyte and transporting it to the rinsing mechanism.

6. The power battery electrolyte recovery system according to claim 2, characterized in that, The electrolyte extraction mechanism further includes an extractant recovery unit, which connects the first output pipe of the back-extraction unit and the input pipe of the extraction unit, for collecting the extractant in the electrolyte after back-extraction and transporting it to the extraction unit.

7. The power battery electrolyte recovery system according to claim 1, characterized in that, The rinsing mechanism includes: A multi-layered screening section with gradient settings is used to screen the pulverized battery fragments; A spraying element provided to the screening section is used to spray a washing solution to wash the pulverized battery fragments, thereby obtaining an electrolyte containing the washing solution and solid-phase battery fragments.

8. The power battery electrolyte recovery system according to claim 7, characterized in that, The spray component includes multiple pressurizing balls disposed within the cavity of the spray head; And / or, the spray head of the spraying component is a rotatable spray head to cover the screening section.

9. The power battery electrolyte recovery system according to claim 1, characterized in that, It also includes a crushing mechanism, which is connected to the washing mechanism via a conveying channel, for crushing the power battery to form the power battery powder and conveying it to the washing mechanism.

10. The power battery electrolyte recovery system according to claim 1, characterized in that, The rinsing mechanism also includes a solid output port for discharging battery fragments; the power battery electrolyte recovery system also includes a collection mechanism connected to the solid output port for collecting the battery fragments.

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