Powder metal particle detection method, equipment and system

Abstract

The present application relates to a method, device, and system for detecting metal particles in powdered material. The method comprises: uniformly mixing a conductive liquid with a powdered material to be tested to obtain a mixed liquid; wherein an electrode component is disposed in the mixed liquid, and the temperature of the conductive liquid is greater than or equal to a preset electrolysis temperature; applying a preset electrolysis voltage to the electrode component to form an electrolysis path, which is used to electrolyze metal particles in the powdered material to be tested; detecting a charging current in the electrolysis path, and determining information about the metal particles contained in the powdered material to be tested based on the charging current and the preset electrolysis voltage. Embodiments of the present application can improve the efficiency and reliability of metal particle detection.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a method, device and system for detecting powdered metal particles. Background Art

[0002] In battery manufacturing, if the cathode (or positive electrode) powder contains metal particle impurities, the resulting battery cell may experience abnormal self-discharge, affecting the battery cell quality. Therefore, detecting metal particles in battery powder is crucial.

[0003] In the related art, metal particle detection is performed by acid washing the metal particle impurities in the powder and then performing inductively coupled plasma (ICP) testing.

[0004] However, the detection efficiency of the detection method in the related art is not high. Summary of the Invention

[0005] In view of the above problems, the present application provides a powder metal particle detection method, device and system, which can solve the problem of low detection efficiency of the detection methods in related technologies.

[0006] In a first aspect, the present application provides a method for detecting metal particles in powdered material, the method comprising:

[0007] The conductive liquid is mixed evenly with the powder to be tested to obtain a mixed liquid; wherein an electrode component is provided in the mixed liquid, and the temperature of the conductive liquid is greater than or equal to a preset electrolysis temperature;

[0008] Applying a preset electrolysis voltage to the electrode component to form an electrolysis path, the electrolysis path is used to electrolyze the metal particles in the powder to be tested;

[0009] The charging current of the electrolysis path is detected, and information about the metal particles contained in the powder to be tested is determined based on the charging current and the preset electrolysis voltage.

[0010] In an embodiment of the present application, the electrolysis rate of the metal particles in the powder to be tested can be accelerated by uniformly mixing a conductive liquid having a temperature greater than or equal to a preset electrolysis temperature with the powder to be tested. Furthermore, by applying a preset electrolysis voltage to an electrode component provided in the mixed liquid to form an electrolysis path for electrolysis of the metal particles in the powder to be tested, and detecting the charging current of the electrolysis path, the information of the metal particles contained in the powder to be tested is determined based on the charging current and the preset electrolysis voltage. This method does not require complicated pre-processing steps such as pickling, and not only improves the detection efficiency of the metal particles, but also its detection results can better characterize the actual metal particle situation in the powder to be tested, thereby improving the detection efficiency and detection reliability of the metal particles.

[0011] In some embodiments, determining information about metal particles contained in the powder to be tested based on the charging current and the preset electrolysis voltage includes:

[0012] Detect whether there is leakage current in the charging current;

[0013] If there is leakage current in the charging current, the type of metal particles contained in the powder to be tested is determined according to the preset electrolysis voltage, and the content of the metal particles contained in the powder to be tested is determined according to the information of the leakage current.

[0014] In an embodiment of the present application, by detecting whether there is leakage current in the charging current; further, if there is leakage current in the charging current, the type of metal particles contained in the powder to be tested is determined according to the preset electrolysis voltage, and the content of the metal particles contained in the powder to be tested is determined according to the information of the leakage current. By combining the information of the preset electrolysis voltage and the leakage current, the information of the metal particles contained in the powder to be tested can be accurately and conveniently determined.

[0015] In some embodiments, the leakage current information includes the magnitude and frequency of the leakage current, and determining the content of metal particles contained in the powder to be tested based on the leakage current information includes:

[0016] According to the magnitude and frequency of the leakage current, query the correspondence between the magnitude and frequency of the preset reference leakage current and the reference metal particle content, and determine the reference metal particle content corresponding to the magnitude and frequency of the leakage current;

[0017] The content of metal particles contained in the powder to be tested is determined based on the reference metal particle content.

[0018] In some embodiments, the leakage current information includes the area of ​​the leakage current, and determining the content of metal particles contained in the powder to be tested based on the leakage current information includes:

[0019] According to the area of ​​the leakage current, query the corresponding relationship between the preset reference leakage current area and the reference metal particle content, and determine the reference metal particle content corresponding to the area of ​​the leakage current;

[0020] The content of metal particles contained in the powder to be tested is determined based on the reference metal particle content.

[0021] In some embodiments, determining the type of metal particles contained in the powder to be tested according to a preset electrolysis voltage includes:

[0022] According to the preset electrolysis voltage, the corresponding relationship between the preset reference electrolysis voltage and the reference metal particle type is searched to determine the reference metal particle type corresponding to the preset electrolysis voltage;

[0023] The type of metal particles contained in the powder to be tested is determined according to the type of reference metal particles corresponding to the preset electrolysis voltage.

[0024] In some embodiments, applying a predetermined electrolysis voltage to the electrode component to form an electrolysis path comprises:

[0025] Applying different preset electrolysis voltages to the electrode components in ascending order to form corresponding electrolysis paths;

[0026] Correspondingly, the charging current of the electrolysis path is detected, and information about the metal particles contained in the powder to be tested is determined based on the charging current and the preset electrolysis voltage, including:

[0027] Different charging currents corresponding to different preset electrolysis voltages of the electrolysis path are detected respectively, and information of the metal particles contained in the powder to be tested is determined according to the different charging currents and different preset electrolysis voltages corresponding to the different preset electrolysis voltages of the electrolysis path.

[0028] In the embodiment of the present application, different preset electrolysis voltages are applied to the electrode components in ascending order to form corresponding electrolysis paths. Furthermore, by detecting the different charging currents corresponding to the different preset electrolysis voltages in the electrolysis paths, and determining information about the metal particles contained in the powder to be tested based on the different charging currents and different preset electrolysis voltages corresponding to the different preset electrolysis voltages in the electrolysis paths, information about different metal particles in the powder to be tested can be very conveniently detected, thereby further improving the efficiency of metal particle detection.

[0029] In some embodiments, the method further includes: heating the conductive liquid to a preset electrolysis temperature so that the metal particles in the powder to be tested can be better electrolyzed during the charging of the electrode components, thereby further improving the detection efficiency of the metal particles.

[0030] In a second aspect, the present application further provides a powder metal particle detection device, the powder metal particle detection device comprising: a stirring component, a containing component, an electrode component, an electrolysis power source, and a current detection component;

[0031] The containing component is used to contain the conductive liquid and the powder to be tested, wherein the temperature of the conductive liquid is greater than or equal to the preset electrolysis temperature;

[0032] The stirring component is placed in the receiving space of the receiving component and is used to mix the conductive liquid and the powder to be tested evenly to obtain a mixed liquid;

[0033] The electrode component is placed in the receiving space of the receiving component and connected to the electrolysis power source;

[0034] The electrolysis power source is used to apply a preset electrolysis voltage to the electrode components to form an electrolysis path; wherein the electrolysis path is used to electrolyze the metal particles in the powder to be tested;

[0035] The current detection component is used to detect the charging current of the electrolysis path; wherein the charging current is used to determine the information of the metal particles contained in the powder to be tested.

[0036] In the embodiment of the present application, the conductive liquid having a temperature greater than or equal to the preset electrolysis temperature in the receiving component is uniformly mixed with the powder to be tested by a stirring component, so as to accelerate the electrolysis speed of the metal particles in the powder to be tested. Furthermore, a preset electrolysis voltage is applied to the electrode component placed in the receiving component by an electrolysis power source to form an electrolysis path for electrolysis of the metal particles in the powder to be tested, and the charging current of the electrolysis path is detected by a current detection component, so as to determine the information of the metal particles contained in the powder to be tested based on the charging current and the preset electrolysis voltage. This method does not require complicated pre-processing steps such as pickling, and can not only improve the detection efficiency of the metal particles, but also its detection results can better characterize the actual metal particles in the powder to be tested, thereby improving the detection efficiency and detection reliability of the metal particles.

[0037] In some embodiments, the electrode components include: a plurality of positive electrode components and a corresponding plurality of negative electrode components that are spaced apart, and the spacing distance between each positive electrode component and the corresponding negative electrode component is less than or equal to a preset spacing distance;

[0038] The electrolysis power source component is specifically used to apply a preset electrolysis voltage to the multiple positive electrode components and the corresponding multiple negative electrode components, so as to form multiple electrolysis paths respectively;

[0039] The current detection component is specifically used to respectively detect the charging current of each electrolysis path.

[0040] In an embodiment of the present application, a plurality of positive electrode components and corresponding multiple negative electrode components are spaced apart in the accommodating space of the accommodating component, and the spacing distance between each positive electrode component and the corresponding negative electrode component is less than or equal to the preset spacing distance. The electrolysis power source component is specifically used to apply a preset electrolysis voltage to the multiple positive electrode components and the corresponding multiple negative electrode components, respectively, to form multiple electrolysis paths, respectively, and the current detection component is specifically used to detect the charging current of each electrolysis path, respectively. Since the multiple electrolysis paths formed in the embodiment of the present application are in a parallel relationship, the transmission path and transmission resistance can be reduced. Therefore, the embodiment of the present application is conducive to further improving the detection efficiency of metal particles.

[0041] In some embodiments, the device also includes a heating component for heating the temperature of the conductive liquid in the containing component to a preset electrolysis temperature, so that the metal particles in the powder to be tested can be better electrolyzed during the charging process of the electrode component, thereby further improving the detection efficiency of the metal particles.

[0042] In some embodiments, the device also includes a cover part corresponding to the accommodating part, wherein the accommodating part and the cover part are sealed, and the cover part is provided with sealed through holes for the electrode part and the stirring part of the stirring part to pass through respectively, so as to facilitate the process of metal particle detection of the powder to be tested, not only can contaminants be prevented from entering the accommodating part as much as possible, but also liquid loss in the conductive liquid can be prevented as much as possible, thereby helping to further improve the detection accuracy of metal particles.

[0043] In some embodiments, the stirring member is a mechanical rotating stirring member or a vibrating stirring member.

[0044] In some embodiments, the electrolysis power source component is specifically used to: apply different preset electrolysis voltages to the electrode components in ascending order to form corresponding electrolysis paths;

[0045] The current detection component is specifically used to respectively detect different charging currents corresponding to different preset electrolysis voltages of the electrolysis path.

[0046] In an embodiment of the present application, different preset electrolysis voltages are applied to the electrode components in order from small to large by the electrolysis power source component to form corresponding electrolysis paths, and the current detection component detects the different charging currents corresponding to the different preset electrolysis voltages of the electrolysis path, so as to determine the information of the metal particles contained in the powder to be tested based on the different charging currents and different preset electrolysis voltages corresponding to the electrolysis path at different preset electrolysis voltages. It can be seen that the embodiment of the present application can very conveniently detect the information of different metal particles in the powder to be tested, which is conducive to further improving the detection efficiency of metal particles.

[0047] In a third aspect, the present application further provides a powder metal particle detection system, the system comprising an electronic device and the powder metal particle detection device as described in any one of the second aspects;

[0048] Among them, the electronic device is used to obtain the charging current of the electrolysis path from the powder metal particle detection equipment, and determine the information of the metal particles contained in the powder to be tested based on the charging current and the preset electrolysis voltage.

[0049] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0051] Figure 1 Schematic diagram of the dendrite growth process in a battery cell;

[0052] Figure 2 A schematic flow chart of a powder metal particle detection method provided in some embodiments of the present application;

[0053] Figure 3A A schematic flow chart of a powder metal particle detection method provided in other embodiments of the present application;

[0054] Figure 3B A schematic diagram of the charging current of any electrolysis path at a preset electrolysis voltage provided in some embodiments of the present application;

[0055] Figure 4 A schematic diagram of the structure of a powder metal particle detection device provided in some embodiments of the present application;

[0056] Figure 5 A schematic diagram of the structure of a powder metal particle detection device provided in other embodiments of the present application;

[0057] Figure 6 A schematic diagram of the structure of a powder metal particle detection device provided in other embodiments of the present application;

[0058] Figure 7 A schematic diagram of the structure of a powder metal particle detection device provided in other embodiments of the present application;

[0059] Figure 8 A schematic diagram of the structure of a powder metal particle detection device provided in other embodiments of the present application;

[0060] Figure 9 A schematic flow chart of a powder metal particle detection method provided in other embodiments of the present application;

[0061] Figure 10 This is a schematic structural diagram of a powder metal particle detection system provided in some embodiments of the present application. DETAILED DESCRIPTION

[0062] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the term "include" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0064] The powder metal particle detection method, device and system in the embodiments of the present application can be applied to the metal particle detection application scenario of battery powder; of course, it can also be applied to other application scenarios.

[0065] It should be noted that, for ease of explanation, the following embodiments illustrate the powder metal particle detection method, device, and system of the present application as applied to the metal particle detection application scenario of battery powder. It should be understood that when the powder metal particle detection method, device, and system of the present application are applied to other scenarios, their implementation principles and technical effects are similar.

[0066] In the related art, metal particle detection is performed by acid-washing the metal particle impurities in the powder and then performing an ICP test. However, the related art has the problem of low detection efficiency.

[0067] In order to solve the problem of low detection efficiency in related technologies, the present application proposes that the electrolysis rate of the metal particles in the powder to be tested can be accelerated by directly adding the powder to be tested to a conductive liquid whose temperature reaches a preset electrolysis temperature and uniformly mixing the conductive liquid with the powder to be tested. Furthermore, by applying a preset electrolysis voltage to the electrode components set in the mixed liquid to form an electrolysis path for electrolysis of the metal particles in the powder to be tested, and detecting the charging current of the electrolysis path, the information of the metal particles contained in the powder to be tested is determined based on the charging current and the preset electrolysis voltage. This method does not require complicated pre-treatment steps such as pickling, which not only improves the detection efficiency of metal particles, but also makes the detection results more representative of the actual metal particles in the powder to be tested, thereby improving the detection efficiency and detection reliability of metal particles.

[0068] For ease of understanding, some of the terms involved in the following embodiments of this application are first introduced and explained.

[0069] The electrolysis of metal particles (or simply metal particle electrolysis) involved in the embodiments of the present application refers to a process in which the metal particles undergo an oxidation-reduction reaction in an electrolyte solution (or simply electrolyte or conductive liquid) under the action of direct current using the principle of electrolysis, thereby achieving the purpose of metal dissolution, deposition, and / or purification.

[0070] For example, metal impurities (such as Fe and Cu) are more easily oxidized (lower potential) than the positive electrode material in the electrolyte solution, and preferentially undergo anodic dissolution: Fe→Fe2++2e- (or Cu→Cu2++2e-).

[0071] Any preset electrolysis voltage (or reference electrolysis voltage) referred to in the embodiments of this application refers to the minimum applied voltage required for the corresponding metal to undergo electrolysis in an electrolyte solution, also known as the decomposition voltage. It is the driving force behind the redox reaction of metal ions at the electrode. The electrolysis reaction can only proceed continuously when the applied voltage reaches or exceeds the decomposition voltage.

[0072] The preset electrolysis temperature involved in the embodiments of the present application refers to the temperature required to facilitate the electrolysis reaction of different metals in the electrolyte solution.

[0073] Secondly, the following embodiments of the present application briefly introduce and illustrate the principle of a micro short circuit occurring in a battery cell when the battery cell contains metal particle impurities.

[0074] In some embodiments, Figure 1 Schematic diagram of the dendrite growth process in a battery cell, as shown in Figure 1 As shown, a battery cell typically includes, but is not limited to, a positive electrode, a separator, a negative electrode, and an electrolyte solution. When metal particles are present in a battery cell, they oxidize and dissolve at the positive electrode, diffuse, and gradually form dendrites on the negative electrode. As the metal particles further dissolve, the dendrites on the negative electrode grow larger and may pierce the separator, causing a micro-short circuit between the positive and negative electrodes and generating leakage current.

[0075] In some embodiments, Figure 2 A schematic diagram of a process for detecting powdered metal particles provided in some embodiments of the present application is shown in FIG. Figure 2 As shown, the method of the embodiment of the present application may include the following steps:

[0076] Step S201: Evenly mix the conductive liquid and the powder to be tested to obtain a mixed liquid; wherein an electrode component is provided in the mixed liquid, and the temperature of the conductive liquid is greater than or equal to a preset electrolysis temperature.

[0077] To promote electrolysis of the metal particles in the powder being tested, the temperature of the conductive liquid in the embodiments of the present application can be greater than or equal to a preset electrolysis temperature, which helps improve the electrolysis efficiency of the metal particle impurities. For example, the preset electrolysis temperature can include, but is not limited to, 75°C. For example, the temperature of the conductive liquid can be equal to the preset electrolysis temperature.

[0078] In the embodiment of the present application, an electrode component may be provided in the mixed liquid to facilitate subsequent electrolysis of the metal particles in the powder to be tested.

[0079] In this step, the conductive liquid and the powder to be tested can be evenly mixed to obtain a mixed liquid, so as to increase the probability of the conductive liquid and the powder to be tested contacting the electrode components, thereby facilitating the electrolysis efficiency of the metal particle impurities in the powder to be tested.

[0080] Step S202: applying a preset electrolysis voltage to the electrode components to form an electrolysis path, where the electrolysis path is used to electrolyze the metal particles in the powder to be tested.

[0081] In this step, the electrode component can be charged by applying a preset electrolysis voltage to the electrode component, so that an electrolysis path is formed between the electrode component, the conductive liquid and the powder to be tested, so that the metal particles in the powder to be tested can be fully electrolyzed under the electrolysis path.

[0082] It should be noted that when the metal particles in the powder to be tested undergo electrolysis, the charging current of the electrolysis path will change.

[0083] It should be understood that the preset electrolysis voltages corresponding to different types of metal particles may be different, and voltage may be applied to the electrode component according to the preset electrolysis voltage corresponding to the possible type of metal particles to facilitate detection of whether the powder to be tested includes this type of metal particles.

[0084] For example, the preset electrolysis voltage in the embodiments of the present application may range from, but is not limited to, 3V to 4.9V, which is beneficial for improving the electrolysis efficiency of metal particle impurities. For example, the preset electrolysis voltage may range from 3.9V to 4.5V.

[0085] Step S203: detecting the charging current of the electrolysis path, and determining information about the metal particles contained in the powder to be tested based on the charging current and the preset electrolysis voltage.

[0086] In this step, the charging current of the electrolysis path formed in step S202 can be detected, and information about the metal particles contained in the powder to be tested can be determined based on the charging current and the preset electrolysis voltage. For example, the information about the metal particles contained in the powder to be tested can include, but is not limited to, the type of metal particles contained in the powder to be tested and / or the content of the metal particles contained in the powder to be tested.

[0087] In one possible implementation, information about the metal particles contained in the powder to be tested can be determined by analyzing changes in the charging current and a preset electrolysis voltage.

[0088] In another possible implementation, the charging current and the preset electrolysis voltage can be input into a first preset metal particle detection model to obtain information about the metal particles contained in the powder to be tested. Exemplarily, the first preset metal particle detection model may include, but is not limited to, an artificial intelligence (AI) model, such as a machine learning model.

[0089] In summary, compared with the detection methods in the related art, the embodiment of the present application can accelerate the electrolysis rate of the metal particles in the powder to be tested by uniformly mixing a conductive liquid having a temperature greater than or equal to a preset electrolysis temperature with the powder to be tested. Furthermore, by applying a preset electrolysis voltage to the electrode components set in the mixed liquid to form an electrolysis path for electrolysis of the metal particles in the powder to be tested, and detecting the charging current of the electrolysis path, the information of the metal particles contained in the powder to be tested is determined based on the charging current and the preset electrolysis voltage. This method does not require complicated pre-processing steps such as pickling, which not only improves the detection efficiency of metal particles, but also makes the detection results more representative of the actual metal particle situation in the powder to be tested, thereby improving the detection efficiency and detection reliability of metal particles.

[0090] In some embodiments, considering that the battery powder may contain multiple types of metal particles, the preset electrolysis voltage in the above step S202 may include preset electrolysis voltages corresponding to multiple types of metal particles. The above step S202 may include: applying different preset electrolysis voltages to the electrode components in order from small to large to form corresponding electrolysis paths respectively.

[0091] In an embodiment of the present application, different preset electrolysis voltages can be applied to the electrode components in ascending order according to the preset electrolysis voltages corresponding to different types of metal particles that may exist, so as to form corresponding electrolysis paths, so as to facilitate detection of whether the powder to be tested includes these types of metal particles.

[0092] For example, assuming that the powder to be tested may contain stainless steel particle impurities, copper particle impurities and iron particle impurities, and the preset electrolysis voltage 1 corresponding to the copper particles is less than the preset electrolysis voltage 2 corresponding to the iron particles, and the preset electrolysis voltage 2 corresponding to the iron particles is less than the preset electrolysis voltage 3 corresponding to the stainless steel particles, then the preset electrolysis voltage 1 can be applied to the electrode component to form a corresponding electrolysis path 1, and continue for a first preset time, so that the copper particle impurities in the powder to be tested are completely electrolyzed, so as to facilitate the detection of whether the powder to be tested includes copper particle impurities.

[0093] Furthermore, a preset electrolysis voltage 2 can be applied to the electrode component to form a corresponding electrolysis path 2, and the voltage is maintained for a second preset time, so that the iron particle impurities in the powder to be tested are completely electrolyzed, so as to facilitate detection of whether the powder to be tested includes iron particle impurities.

[0094] Furthermore, a preset electrolysis voltage 3 can be applied to the electrode component to form a corresponding electrolysis path 3, and the electrolysis voltage 3 can be applied for a third preset time period to completely electrolyze the stainless steel particle impurities in the powder to be tested, so as to facilitate detection of whether the powder to be tested includes stainless steel particle impurities. The first preset time period, the second preset time period, and the third preset time period can be the same or different. For example, the first preset time period, the second preset time period, and the third preset time period can all be greater than or equal to 5 hours.

[0095] Correspondingly, the above step S203 may include: respectively detecting different charging currents corresponding to different preset electrolysis voltages of the electrolysis path, and determining information about the metal particles contained in the powder to be tested based on the different charging currents and different preset electrolysis voltages corresponding to the different preset electrolysis voltages of the electrolysis path.

[0096] In the embodiment of the present application, for any preset electrolysis voltage, the charging current of the electrolysis path corresponding to the preset electrolysis voltage can be detected, and the information of the metal particles contained in the powder to be tested can be determined based on the charging current of the electrolysis path corresponding to the preset electrolysis voltage and the preset electrolysis voltage.

[0097] It should be noted that the method for determining the information of the metal particles contained in the powder to be tested based on the charging current corresponding to the preset electrolysis voltage in any electrolysis path and the preset electrolysis voltage can refer to the relevant implementable method of "determining the information of the metal particles contained in the powder to be tested based on the charging current and the preset electrolysis voltage" in step S203, and will not be repeated in the embodiments of the present application.

[0098] For example, the information of the copper particles included in the powder to be tested can be determined by detecting the charging current 1 corresponding to the preset electrolysis voltage 1 of the above-mentioned electrolysis path 1, and based on the charging current 1 and the preset electrolysis voltage 1 corresponding to the electrolysis path 1 at the preset electrolysis voltage 1.

[0099] Furthermore, the information of the iron particles included in the powder to be tested can be determined by detecting the charging current 2 corresponding to the preset electrolysis voltage 2 of the above-mentioned electrolysis path 2, and according to the charging current 2 and the preset electrolysis voltage 2 corresponding to the preset electrolysis voltage 2 of the electrolysis path 2.

[0100] Furthermore, the information that the powder to be tested includes stainless steel particles can be determined by detecting the charging current 3 corresponding to the preset electrolysis voltage 3 of the above-mentioned electrolysis path 3, and based on the charging current 3 and the preset electrolysis voltage 3 corresponding to the preset electrolysis voltage 3 of the electrolysis path 3.

[0101] In summary, in the embodiments of the present application, different preset electrolysis voltages are applied to the electrode components in ascending order to form corresponding electrolysis paths. Furthermore, by detecting the different charging currents corresponding to the different preset electrolysis voltages in the electrolysis paths, and determining information about the metal particles contained in the powder to be tested based on the different charging currents and different preset electrolysis voltages corresponding to the different preset electrolysis voltages in the electrolysis paths, information about different metal particles in the powder to be tested can be very conveniently detected, thereby further improving the efficiency of metal particle detection.

[0102] In some embodiments, before the conductive liquid is evenly mixed with the powder to be tested, the method of the embodiment of the present application may further include the following steps: heating the conductive liquid to a preset electrolysis temperature so that the metal particles in the powder to be tested can be better electrolyzed during the charging of the electrode components, thereby further improving the detection efficiency of the metal particles.

[0103] In some embodiments, Figure 3A This is a flow chart of a method for detecting metal particles in powder provided by another embodiment of the present application. This embodiment of the present application provides an exemplary introduction to the relevant content of "determining the information of the metal particles contained in the powder to be tested based on the charging current and the preset electrolysis voltage" in the above step S203. Figure 3A As shown, the method of the embodiment of the present application may include the following steps:

[0104] Step S2031: Detect whether there is leakage current in the charging current.

[0105] In this step, it is detected whether there is leakage current (also called sudden change current or jump current) in the charging current of the electrolysis path.

[0106] Figure 3B Schematic diagram of the charging current of any electrolysis path under a preset electrolysis voltage provided in some embodiments of the present application, such as Figure 3B As shown, the charging current of the powder to be tested containing copper particles at a preset electrolysis temperature of 75° C. and a preset electrolysis voltage of 4.2 V may have leakage current at certain moments.

[0107] Step S2032: If there is leakage current in the charging current, the type of metal particles contained in the powder to be tested is determined according to the preset electrolysis voltage, and the content of the metal particles contained in the powder to be tested is determined according to the information of the leakage current.

[0108] In this step, if there is leakage current in the charging current, the type of metal particles contained in the powder to be tested can be determined according to the preset electrolysis voltage, and the content of the metal particles contained in the powder to be tested can be determined according to the leakage current information.

[0109] For example, the leakage current information involved in the embodiments of the present application may include but is not limited to the magnitude and frequency of the leakage current. The magnitude of the leakage current may refer to the magnitude of the current when the charging current changes.

[0110] As another example, the leakage current information involved in the embodiments of the present application may include but is not limited to the leakage current area, wherein the leakage current area may refer to the area corresponding to the portion of the current curve where the current curve corresponding to the charging current changes.

[0111] It should be understood that if there is no leakage current in the charging current, it means that the powder to be tested does not include metal particle impurities corresponding to the current preset electrolysis voltage. The size of the preset electrolysis voltage can be further adjusted to facilitate the detection of whether the powder to be tested includes other types of metal particle impurities.

[0112] In some embodiments, the embodiments of the present application provide an exemplary introduction and description of the relevant content of "determining the type of metal particles contained in the powder to be tested according to the preset electrolysis voltage" in the above step S2032.

[0113] In one possible implementation, the correspondence between the preset reference electrolysis voltage and the reference metal particle type is queried according to the preset electrolysis voltage, the reference metal particle type corresponding to the preset electrolysis voltage is determined, and the type of metal particles contained in the powder to be tested is determined according to the reference metal particle type corresponding to the preset electrolysis voltage.

[0114] The correspondence between the preset reference electrolysis voltage and the reference metal particle type involved in the embodiments of the present application may include but is not limited to the correspondence between different reference electrolysis voltages and corresponding reference metal particle types.

[0115] In an embodiment of the present application, the correspondence between the preset reference electrolysis voltage and the reference metal particle type can be queried based on the preset electrolysis voltage, and the reference metal particle type corresponding to the above-mentioned preset electrolysis voltage in the correspondence between the preset reference electrolysis voltage and the reference metal particle type can be determined, and the reference metal particle type corresponding to the preset electrolysis voltage can be used as the type of metal particles contained in the powder to be tested.

[0116] In another possible implementation, a preset electrolysis voltage can be input into a second preset metal particle detection model to obtain the type of metal particles contained in the powder to be tested, as output by the second preset metal particle detection model. Exemplarily, the second preset metal particle detection model can include, but is not limited to, an AI model such as a machine learning model.

[0117] Of course, the type of metal particles contained in the powder to be tested can also be determined in other ways according to the preset electrolysis voltage.

[0118] In some embodiments, the embodiments of the present application provide an exemplary introduction and description of the relevant content of "determining the content of metal particles contained in the powder to be tested based on the information of the leakage current" in the above step S2032.

[0119] In one possible implementation, when the leakage current information includes the magnitude and frequency of the leakage current, the correspondence between the preset reference leakage current magnitude and frequency and the reference metal particle content is queried based on the magnitude and frequency of the leakage current, the reference metal particle content corresponding to the magnitude and frequency of the leakage current is determined, and the content of metal particles contained in the powder to be tested is determined based on the reference metal particle content.

[0120] The correspondence between the preset reference leakage current magnitudes and times and the reference metal particle contents involved in the embodiments of the present application may include but is not limited to the correspondence between different reference leakage current magnitudes and times and the corresponding reference metal particle contents.

[0121] In an embodiment of the present application, the correspondence between the preset reference leakage current size and number and the reference metal particle content can be queried based on the size and number of leakage currents, and the reference metal particle content corresponding to the size and number of leakage currents in the correspondence between the preset reference leakage current size and number and the reference metal particle content can be determined, and the reference metal particle content can be used as the content of metal particles contained in the powder to be tested.

[0122] In another possible implementation, when the leakage current information includes the area of ​​the leakage current, the correspondence between the preset reference leakage current area and the reference metal particle content is queried based on the area of ​​the leakage current, the reference metal particle content corresponding to the area of ​​the above leakage current is determined, and the content of metal particles contained in the powder to be tested is determined based on the reference metal particle content.

[0123] The correspondence between the preset reference leakage current area and the reference metal particle content involved in the embodiments of the present application may include but is not limited to the correspondence between different reference leakage current areas and corresponding reference metal particle contents.

[0124] In an embodiment of the present application, the correspondence between the preset reference leakage current area and the reference metal particle content can be queried based on the area of ​​the leakage current, and the reference metal particle content corresponding to the area of ​​the above leakage current in the correspondence between the preset reference leakage current area and the reference metal particle content can be determined, and the reference metal particle content corresponding to the area of ​​the above leakage current can be used as the content of metal particles contained in the powder to be tested.

[0125] In another possible implementation, leakage current information can be input into a third preset metal particle detection model to obtain the metal particle content of the powder to be tested, as output by the third preset metal particle detection model. Exemplarily, the third preset metal particle detection model can include, but is not limited to, an AI model such as a machine learning model.

[0126] Of course, the content of metal particles in the powder to be tested can also be determined in other ways based on the leakage current information.

[0127] In summary, in the embodiments of the present application, by detecting whether there is leakage current in the charging current; further, if there is leakage current in the charging current, the type of metal particles contained in the powder to be tested is determined according to the preset electrolysis voltage, and the content of the metal particles contained in the powder to be tested is determined according to the information of the leakage current. By combining the information of the preset electrolysis voltage and the leakage current, the information of the metal particles contained in the powder to be tested can be accurately and conveniently determined.

[0128] In some embodiments, Figure 4 This is a schematic diagram of the structure of the powder metal particle detection equipment provided in some embodiments of the present application, such as Figure 4 As shown, the powder metal particle detection device of the embodiment of the present application may include but is not limited to: a stirring component 41 , a containing component 42 , an electrode component 43 , an electrolysis power source 44 and a current detection component 45 .

[0129] The receiving component 42 in the embodiment of the present application can be used to receive the conductive liquid ( Figure 4 Not shown) and the powder to be tested ( Figure 4 In order to promote electrolysis of the metal particles in the powder to be tested, the temperature of the conductive liquid in the embodiment of the present application is greater than or equal to the preset electrolysis temperature.

[0130] For example, the receiving component 42 in the embodiment of the present application can be made of a material that is resistant to high temperatures and corrosive liquids (or a material with good corrosion resistance). For example, the material of the receiving component 42 can include, but is not limited to, any of the following materials: polytetrafluoroethylene, glass.

[0131] For example, the conductive liquid can be preheated to a temperature greater than or equal to a preset electrolysis temperature before being added to the container 42. In another example, the conductive liquid in the container 42 can be heated to a temperature greater than or equal to the preset electrolysis temperature by a heating component. Of course, other methods can also be used to increase the temperature of the conductive liquid to greater than or equal to the preset electrolysis temperature.

[0132] The stirring component 41 in the embodiment of the present application can be placed in the accommodating space of the accommodating component 42, and can provide kinetic energy for the conductive liquid and the powder to be tested in the accommodating component 42, and can be used to mix the conductive liquid and the powder to be tested evenly to obtain a mixed liquid.

[0133] It should be understood that the stirring of the stirring component 41 can increase the movement opportunity (or movement efficiency) of the metal particles in the powder to be tested, and can increase the chance (or probability) of the metal particles in the powder to be tested contacting the electrode component, thereby helping to improve the electrolysis efficiency of the metal particles in the powder to be tested.

[0134] In order to detect magnetic particles and non-magnetic particles simultaneously, the stirring member 41 in the embodiment of the present application can adopt a non-magnetic stirring method. For example, the stirring member 41 can adopt a mechanical rotation stirring method, a vibration stirring method, and / or an ultrasonic stirring method.

[0135] The electrode component 43 in the embodiment of the present application can be placed in the accommodating space of the accommodating component 42 (that is, the electrode component 43 is placed in the conductive liquid, or in the mixed liquid), and can be connected to the electrolysis power source 44.

[0136] Exemplarily, the electrode component 43 can be fixedly arranged in the accommodating space of the accommodating component 42, not only to avoid the shaking of the electrode component 43 affecting the detection reliability during the process of stirring the conductive liquid and the powder to be tested by the stirring component 41, but also to avoid the situation where the positive and negative electrodes in the electrode component 43 contact and cause a short circuit.

[0137] For example, the shape of the electrode component 43 may include but is not limited to circular, square or rectangular; the material of the electrode component 43 may include but is not limited to platinum, graphite, and aluminum.

[0138] The electrolysis power source 44 in the embodiment of the present application can be a source of electrolysis power for the metal particles in the powder to be tested, and can be used to apply a preset electrolysis voltage to the electrode component 43 to charge the electrode component so as to form an electrolysis path between the electrode component, the conductive liquid and the powder to be tested (for electrolysis of the metal particles in the powder to be tested), so that the metal particles in the powder to be tested can be electrolyzed under the electrolysis path.

[0139] For example, the electrolysis power source 44 in the embodiment of the present application can apply a preset electrolysis voltage to the electrode component 43 to charge the electrode component according to a preset microcurrent, thereby improving the electrolysis efficiency of the metal particulate impurities. For example, the preset microcurrent can include but is not limited to 5 mA or 10 mA.

[0140] For example, the electrolysis power source 44 involved in the embodiments of the present application may include but is not limited to a charger or an electrochemical testing device.

[0141] It should be noted that the electrolytic power source 44 can also be independent of the powder metal particle detection equipment (ie, the electrolytic power source 44 can be arranged outside the powder metal particle detection equipment) to provide power for the powder metal particle detection equipment.

[0142] It should be understood that the preset electrolysis voltages corresponding to different types of metal particles may be different, and the electrolysis power source 44 can be used to apply voltage to the electrode component 43 according to the preset electrolysis voltage corresponding to the possible type of metal particles, so as to detect whether the powder to be tested includes this type of metal particles.

[0143] The current detection component 45 in the embodiment of the present application can be used to detect the charging current of the electrolysis path, so as to determine the information of the metal particles contained in the powder to be tested based on the charging current and the preset electrolysis voltage.

[0144] Exemplarily, the current detection component 45 may be a component independent of the electrolysis power source 44, or may be a component integrated into the electrolysis power source 44. It should be understood that Figure 4 In the figure, the current detection component 45 is integrated into the electrolysis power source 44 as an example.

[0145] It should be understood that the specific method of determining the information of the metal particles contained in the powder to be tested based on the charging current and the preset electrolysis voltage can refer to the relevant content in the above-mentioned powder metal particle detection method embodiment of this application, and this is not limited to this in the embodiment of this application.

[0146] In summary, compared with the detection methods in the related art, the embodiment of the present application uses a stirring component to evenly mix the conductive liquid in the containing component, whose temperature is greater than or equal to the preset electrolysis temperature, with the powder to be tested, so as to accelerate the electrolysis rate of the metal particles in the powder to be tested. Furthermore, a preset electrolysis voltage is applied to the electrode component placed in the containing component by an electrolysis power source to form an electrolysis path for electrolysis of the metal particles in the powder to be tested, and the charging current of the electrolysis path is detected by a current detection component, so as to determine the information of the metal particles contained in the powder to be tested based on the charging current and the preset electrolysis voltage. This method does not require complicated pre-processing operation steps such as pickling, and can not only improve the detection efficiency of metal particles, but also its detection results can better characterize the actual metal particle situation in the powder to be tested, thereby improving the detection efficiency and detection reliability of metal particles.

[0147] In some embodiments, considering that the battery powder may contain various types of metal particle impurities, the electrolysis power source component 44 in the embodiment of the present application can be specifically used to apply different preset electrolysis voltages to the electrode components 43 in order from small to large to form corresponding electrolysis paths respectively.

[0148] In an embodiment of the present application, the electrolysis power source component 44 can be specifically used to apply different preset electrolysis voltages to the electrode component 43 in ascending order according to the preset electrolysis voltages corresponding to different types of metal particles that may exist, so as to form corresponding electrolysis paths, so as to facilitate detection of whether the powder to be tested includes these types of metal particles.

[0149] Correspondingly, the current detection component 45 in the embodiment of the present application can be specifically used to respectively detect the different charging currents corresponding to different preset electrolysis voltages of the electrolysis path, so as to determine the information of the metal particles contained in the powder to be tested based on the different charging currents and different preset electrolysis voltages corresponding to the different preset electrolysis voltages of the electrolysis path.

[0150] In the embodiment of the present application, for any preset electrolysis voltage, the current detection component 45 can be specifically used to detect the charging current of the electrolysis path corresponding to the preset electrolysis voltage, so as to determine the information of the metal particles contained in the powder to be tested based on the charging current of the electrolysis path corresponding to the preset electrolysis voltage and the preset electrolysis voltage.

[0151] In summary, in the embodiment of the present application, different preset electrolysis voltages are applied to the electrode components in order from small to large by the electrolysis power source component to form corresponding electrolysis paths, and the current detection component detects the different charging currents corresponding to the different preset electrolysis voltages of the electrolysis path, so as to determine the information of the metal particles contained in the powder to be tested according to the different charging currents and different preset electrolysis voltages corresponding to the electrolysis path at different preset electrolysis voltages. It can be seen that the embodiment of the present application can very conveniently detect the information of different metal particles in the powder to be tested, which is conducive to further improving the detection efficiency of metal particles.

[0152] In some embodiments, Figure 5 This is a schematic diagram of the structure of the powder metal particle detection equipment provided in some other embodiments of the present application, such as Figure 5 As shown, to further improve the detection efficiency of metal particles, the electrode components 43 in the embodiment of the present application may include, but are not limited to, multiple positive electrode components 43+ and corresponding multiple negative electrode components 43- arranged at intervals. The spacing between each positive electrode component 43+ and the corresponding negative electrode component 43- can be less than or equal to a predetermined spacing distance, which helps improve the electrolysis efficiency of metal particle impurities. For example, the predetermined spacing distance can be 4.5 cm or 5 cm; of course, the predetermined spacing distance can also be other values ​​(the distance between the positive and negative electrode components is as small as possible, as long as the positive and negative electrode components do not overlap).

[0153] In the embodiment of the present application, each positive electrode component 43+ and the corresponding negative electrode component 43- can be referred to as a set of electrode components. For example, each positive electrode component 43+ can be connected to the positive electrode of the electrolytic power source component 44, and each negative electrode component 43- can be connected to the negative electrode of the electrolytic power source component 44.

[0154] Correspondingly, the electrolysis power source component 44 in the embodiment of the present application can be specifically used to: apply preset electrolysis voltages to multiple positive electrode components 43+ and corresponding multiple negative electrode components 43-, so as to form multiple electrolysis paths respectively.

[0155] The electrolysis power source component 44 in the embodiment of the present application can apply a preset electrolysis voltage to multiple groups of electrode components (positive electrode component 43+ and corresponding negative electrode component 43-) respectively, so as to form corresponding electrolysis paths between the positive electrode component 43+, the conductive liquid, the powder to be tested and the negative electrode component 43- in the multiple groups of electrode components.

[0156] For example, if the powder to be tested is a positive electrode powder, due to its inherent weak conductivity, the temperature of the conductive liquid being greater than or equal to the preset electrolysis temperature, and the stirring action of the stirring component, can accelerate the migration of metal particles in the positive electrode powder to the negative electrode component, resulting in a transient leakage current, i.e., a current change. The enhanced fluidity of the powder to be tested and the conductive liquid increases the electrolysis efficiency of the metal particles in the powder to be tested.

[0157] It should be understood that the multiple electrolysis pathways are connected in parallel. By connecting the multiple electrolysis pathways in parallel, the transmission path and transmission resistance can be reduced, thereby further improving the detection efficiency of metal particles.

[0158] Correspondingly, the current detection component 45 in the embodiment of the present application can be specifically used to detect the charging current of each electrolysis path respectively, so that the information of the metal particles contained in the powder to be tested can be determined based on the charging current of any electrolysis path and the preset electrolysis voltage.

[0159] In summary, in the embodiment of the present application, multiple positive electrode components and corresponding multiple negative electrode components are spaced apart in the accommodating space of the accommodating component, and the spacing distance between each positive electrode component and the corresponding negative electrode component is less than or equal to the preset spacing distance. The electrolysis power source component is specifically used to apply a preset electrolysis voltage to the multiple positive electrode components and the corresponding multiple negative electrode components, respectively, to form multiple electrolysis paths, respectively, and the current detection component is specifically used to detect the charging current of each electrolysis path, respectively. Since the multiple electrolysis paths formed in the embodiment of the present application are in a parallel relationship, the transmission path and transmission resistance can be reduced. Therefore, the embodiment of the present application is conducive to further improving the detection efficiency of metal particles.

[0160] In some embodiments, Figure 6 This is a schematic diagram of the structure of the powder metal particle detection equipment provided in some other embodiments of the present application, such as Figure 6 As shown, the powder metal particle detection device of the embodiment of the present application may also include a heating component 46, which is used to heat the temperature of the conductive liquid in the containing component 42 to a preset electrolysis temperature, so that during the charging process of the electrode component 43, the metal particles in the powder to be tested can be better electrolyzed, thereby helping to further improve the detection efficiency of metal particles.

[0161] Illustratively, the heating component 46 involved in the embodiment of the present application may include but is not limited to an electric heating component, and / or a liquid heating component.

[0162] For example, the shape of the receiving component 42 may include but is not limited to a circle, a square or a rectangle. Correspondingly, the shape of the heating component 46 may also include but is not limited to a circle, a square or a rectangle.

[0163] For example, the heating component 46 can be disposed at the bottom of the accommodation space of the accommodation component 42, or disposed around the accommodation space of the accommodation component 42, so as to heat the temperature of the conductive liquid in the accommodation component 42 to a preset electrolysis temperature. Figure 6 In the figure, the heating component 46 is shown as an example in which it can be arranged at the bottom of the accommodation space of the accommodation component 42.

[0164] In some embodiments, Figure 7 This is a schematic diagram of the structure of the powder metal particle detection equipment provided in some other embodiments of the present application, such as Figure 7 As shown, the powder metal particle detection device of the embodiment of the present application may further include a cover member 47 corresponding to the receiving member 42. The receiving member 42 and the cover member 47 may be sealed, and the cover member 47 may be provided with sealed through holes for respectively passing the electrode member 43 and the stirring portion of the stirring member 41. This allows for not only minimizing the entry of contaminants into the receiving member 42 during metal particle detection of the powder to be tested, but also minimizing the loss of liquid in the conductive liquid, thereby further improving the accuracy of metal particle detection.

[0165] For example, the accommodating component 42 and the cover component 47 may be sealed by using a seal (such as rubber, etc.), or by using an interference fit snap fit, or by using a screw cap.

[0166] Illustratively, the sealing method of the sealing through hole may include, but is not limited to, any one of the following: a sealing member sealing method, an interference fit snap-fit ​​sealing method, and a screw-on sealing method.

[0167] For example, the electrode component 43 can be fixedly disposed in the accommodation space of the accommodation component 42 by passing through a fixed sealing through-hole in the cover component 47. Of course, the electrode component 43 can also be fixedly disposed in the accommodation space of the accommodation component 42 by other means, for example, the electrode component 43 can be inserted into a preset groove in the accommodation space of the accommodation component 42.

[0168] In some embodiments, Figure 8 This is a schematic diagram of the structure of the powder metal particle detection device provided in other embodiments of the present application. Based on the above embodiments, the present embodiment takes the current detection component 45 integrated in the electrolysis power source 44, and the electrode component 43 including three positive electrode components 43+ and corresponding three negative electrode components 43- (i.e., three groups of electrode components) as an example to illustrate the overall structure of the powder metal particle detection device. Figure 8 As shown, the powder metal particle detection device in the embodiment of the present application may include: a stirring component 41, a containing component 42, an electrode component 43, an electrolysis power source 44 (including a current detection component 45), a heating component 46 and a cover component 47.

[0169] Figure 9 This is a flow chart of a method for detecting metal particles in powder provided in some other embodiments of the present application. For ease of understanding, the present application embodiment provides an exemplary description of the process of detecting a certain type of metal particle impurities that may exist. Figure 8 and Figure 9 As shown, the method of the embodiment of the present application may include the following steps:

[0170] Step S901 : Add the conductive liquid and the powder to be tested into the receiving component 42 , and insert three sets of electrode components (three positive electrode components 43+ and corresponding three negative electrode components 43 − ) into the receiving space of the receiving component 42 at even intervals.

[0171] Exemplarily, each positive electrode component 43+ can be connected to the positive electrode of the electrolytic power source component 44, and each negative electrode component 43- can be connected to the negative electrode of the electrolytic power source component 44.

[0172] Step S902 : placing the receiving assembly 42 on the heating component 46 so that the heating component 46 can heat the conductive liquid in the receiving component 42 to a preset electrolysis temperature.

[0173] Step S903 : inserting the stirring component 41 into the receiving space of the receiving component 42 , so that the stirring component 41 can fully infiltrate and evenly disperse the conductive liquid and the powder to be tested in the receiving component 42 .

[0174] Step S904: Preset electrolysis voltages corresponding to the above-mentioned metal particles can be applied to multiple groups of electrode components (positive electrode components 43+ and corresponding negative electrode components 43-) through the electrolysis power source component 44, so as to form corresponding electrolysis paths between the positive electrode components 43+, the conductive liquid, the powder to be tested and the negative electrode components 43- in the multiple groups of electrode components, and the charging current of each electrolysis path is detected respectively.

[0175] Step S905 : determining information of the metal particles contained in the powder to be tested according to the charging current of any electrolysis path and the preset electrolysis voltage.

[0176] It should be noted that the implementation methods of each step in the embodiments of the present application can refer to the relevant contents in the above-mentioned powder metal particle detection method embodiment or the above-mentioned powder metal particle detection equipment embodiment of the present application, and will not be repeated here.

[0177] It should be understood that, further, the preset electrolysis voltage may be adjusted to facilitate detection of whether other types of metal particle impurities are included in the powder to be tested. The detection process may refer to the above steps S904 to S905.

[0178] In summary, in the powder metal particle detection equipment and powder metal particle detection method provided by the embodiments of the present application, the powder to be tested is directly added to the conductive liquid, and the electrolysis speed of the metal particles in the powder to be tested can be accelerated by stirring the stirring component and heating the heating component. In addition, through the multi-electrode component structure, not only can the disturbed medium be electrolyzed uniformly and omnidirectionally, but also the distance between the metal particles and the electrode components can be shortened, thereby increasing the electrolysis probability of the metal particles to achieve direct electrolysis of the powder to be tested. In addition, the charging current of each electrolysis path is detected by the electrolysis power source component, so as to determine the information of the metal particles contained in the powder to be tested based on the charging current of any electrolysis path and the preset electrolysis voltage, without the need for complicated pre-treatment operation steps such as pickling, which not only improves the detection efficiency of the metal particles, but also its detection results can better characterize the actual metal particle situation in the powder to be tested, thereby improving the detection efficiency and detection reliability of the metal particles. In addition, through the powder metal particle detection equipment and powder metal particle detection method of the embodiments of the present application, the detection efficiency of powder metal particles can be increased by 90%, so as to reduce the scrapping of materials caused by excessive powder metal particles, thereby improving the detectability of metal particles while also improving the reliability of powder.

[0179] It should be understood that, although the steps in the flowcharts of the above embodiments are shown in sequence as indicated by the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be performed in other orders. Moreover, at least a portion of the steps in the flowcharts of the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily to be performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0180] In some embodiments, Figure 10 This is a schematic diagram of the structure of the powder metal particle detection system provided in some embodiments of the present application, such as Figure 10 As shown, the powder metal particle detection system of the embodiment of the present application may include but is not limited to electronic equipment 101 and powder metal particle detection equipment 102. The structure of the powder metal particle detection equipment 102 can refer to the relevant content of any of the above-mentioned powder metal particle detection equipment embodiments of the present application, and will not be repeated here.

[0181] In the embodiment of the present application, the electronic device 101 can be used to obtain the charging current of the electrolysis path from the powder metal particle detection device 102, and determine the information of the metal particles contained in the powder to be tested based on the charging current and the preset electrolysis voltage.

[0182] It should be noted that the specific implementable method for the electronic device 101 to determine the information of the metal particles contained in the powder to be tested based on the charging current and the preset electrolysis voltage can refer to the relevant content in any of the above-mentioned powder metal particle detection method embodiments of this application. The implementation principles and technical effects are similar and will not be repeated here.

[0183] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A method for detecting powdered metal particles, characterized in that: The method comprises: Evenly mixing the conductive liquid with the powder to be tested to obtain a mixed liquid; wherein the mixed liquid is provided with an electrode component, and the temperature of the conductive liquid is greater than or equal to a preset electrolysis temperature; Applying a preset electrolysis voltage to the electrode component to form an electrolysis path, wherein the electrolysis path is used for electrolysis of metal particles in the powder to be tested; detecting a charging current of the electrolysis path, and determining information about metal particles contained in the powder to be tested based on the charging current and the preset electrolysis voltage; Wherein, determining the information of the metal particles contained in the powder to be tested according to the charging current and the preset electrolysis voltage includes: detecting whether there is leakage current in the charging current; If there is leakage current in the charging current, determining the type of metal particles contained in the powder to be tested according to the preset electrolysis voltage, and determining the content of the metal particles contained in the powder to be tested according to the information of the leakage current; The leakage current information includes the magnitude and frequency of the leakage current, and determining the content of metal particles contained in the powder to be tested based on the leakage current information includes: querying the corresponding relationship between the magnitude and frequency of a preset reference leakage current and the reference metal particle content based on the magnitude and frequency of the leakage current, determining the reference metal particle content corresponding to the magnitude and frequency of the leakage current, and determining the content of metal particles contained in the powder to be tested based on the reference metal particle content; or, the leakage current information includes the area of ​​the leakage current, and determining the content of metal particles contained in the powder to be tested based on the leakage current information includes: querying the corresponding relationship between the area of ​​a preset reference leakage current and the reference metal particle content based on the area of ​​the leakage current, determining the reference metal particle content corresponding to the area of ​​the leakage current, and determining the content of metal particles contained in the powder to be tested based on the reference metal particle content; The determining the type of metal particles contained in the powder to be tested according to the preset electrolysis voltage includes: querying a correspondence between a preset reference electrolysis voltage and a reference metal particle type according to the preset electrolysis voltage, and determining a reference metal particle type corresponding to the preset electrolysis voltage; The type of metal particles contained in the powder to be tested is determined according to the type of reference metal particles corresponding to the preset electrolysis voltage.

2. The powder metal particle detection method according to claim 1, characterized in that: The step of applying a preset electrolysis voltage to the electrode component to form an electrolysis path comprises: Applying different preset electrolysis voltages to the electrode components in ascending order to form corresponding electrolysis paths; Correspondingly, detecting the charging current of the electrolysis path and determining information about the metal particles contained in the powder to be tested based on the charging current and the preset electrolysis voltage includes: Different charging currents corresponding to different preset electrolysis voltages of the electrolysis pathway are detected respectively, and information about the metal particles contained in the powder to be tested is determined based on the different charging currents and the different preset electrolysis voltages corresponding to the different preset electrolysis voltages of the electrolysis pathway.

3. The powder metal particle detection method according to claim 1, characterized in that: The method further comprises: The conductive liquid is heated to the preset electrolysis temperature.

4. A powder metal particle detection device, characterized in that: The powder metal particle detection device includes: a stirring component, a containing component, an electrode component, an electrolysis power source and a current detection component; The containing component is used to contain the conductive liquid and the powder to be tested, wherein the temperature of the conductive liquid is greater than or equal to the preset electrolysis temperature; The stirring component is placed in the accommodating space of the accommodating component and is used to evenly mix the conductive liquid and the powder to be tested to obtain a mixed liquid; The electrode component is placed in the accommodation space of the accommodation component and connected to the electrolysis power source; The electrolysis power source is used to apply a preset electrolysis voltage to the electrode component to form an electrolysis path; wherein the electrolysis path is used to electrolyze the metal particles in the powder to be tested; The current detection component is used to detect the charging current of the electrolysis path; wherein the charging current is used to determine the information of the metal particles contained in the powder to be tested; Wherein, determining the information of the metal particles contained in the powder to be tested includes: detecting whether there is leakage current in the charging current; If there is leakage current in the charging current, determining the type of metal particles contained in the powder to be tested according to the preset electrolysis voltage, and determining the content of the metal particles contained in the powder to be tested according to the information of the leakage current; The leakage current information includes the magnitude and frequency of the leakage current, and determining the content of metal particles contained in the powder to be tested based on the leakage current information includes: querying the corresponding relationship between the magnitude and frequency of a preset reference leakage current and the reference metal particle content based on the magnitude and frequency of the leakage current, determining the reference metal particle content corresponding to the magnitude and frequency of the leakage current, and determining the content of metal particles contained in the powder to be tested based on the reference metal particle content; or, the leakage current information includes the area of ​​the leakage current, and determining the content of metal particles contained in the powder to be tested based on the leakage current information includes: querying the corresponding relationship between the area of ​​a preset reference leakage current and the reference metal particle content based on the area of ​​the leakage current, determining the reference metal particle content corresponding to the area of ​​the leakage current, and determining the content of metal particles contained in the powder to be tested based on the reference metal particle content; The determining the type of metal particles contained in the powder to be tested according to the preset electrolysis voltage includes: querying a correspondence between a preset reference electrolysis voltage and a reference metal particle type according to the preset electrolysis voltage, and determining a reference metal particle type corresponding to the preset electrolysis voltage; The type of metal particles contained in the powder to be tested is determined according to the type of reference metal particles corresponding to the preset electrolysis voltage.

5. The powder metal particle detection device according to claim 4, characterized in that: The electrode components include: a plurality of positive electrode components and a corresponding plurality of negative electrode components arranged at intervals, and the interval distance between each positive electrode component and the corresponding negative electrode component is less than or equal to a preset interval distance; The electrolysis power source component is specifically used to apply the preset electrolysis voltage to the plurality of positive electrode components and the corresponding plurality of negative electrode components, so as to form a plurality of electrolysis paths respectively; The current detection component is specifically used to respectively detect the charging current of each electrolysis path.

6. The powder metal particle detection device according to claim 4 or 5, characterized in that: The device further includes a heating component for heating the conductive liquid in the containing component to the preset electrolysis temperature.

7. The powder metal particle detection device according to claim 4 or 5, characterized in that: The device further comprises a cover member corresponding to the accommodating member, wherein the accommodating member and the cover member are sealed, and the cover member is provided with sealed through holes for respectively allowing the electrode member and the stirring portion of the stirring member to pass through.

8. The powder metal particle detection device according to claim 4 or 5, characterized in that: The stirring component is a mechanical rotating stirring component or a vibrating stirring component.

9. The powder metal particle detection device according to claim 4 or 5, characterized in that: The electrolysis power source component is specifically used to: apply different preset electrolysis voltages to the electrode components in order from small to large, so as to form corresponding electrolysis paths respectively; The current detection component is specifically used to respectively detect different charging currents of the electrolysis path corresponding to different preset electrolysis voltages.

10. A powder metal particle detection system, characterized in that: The system comprises an electronic device and a powder metal particle detection device according to any one of claims 4 to 9; The electronic device is used to obtain the charging current of the electrolysis path from the powder metal particle detection device, and determine the information of the metal particles contained in the powder to be tested based on the charging current and the preset electrolysis voltage.

Images