Powder metal particle detection method, equipment and system

Abstract

The invention relates to a powder metal particle detection method, device and system, and the method comprises the steps: uniformly mixing a conductive liquid with to-be-detected powder to obtain a mixed liquid; wherein an electrode part is arranged in the mixed liquid, and the temperature of the conductive liquid is greater than or equal to a preset electrolysis temperature; a preset electrolysis voltage is applied to the electrode component to form an electrolysis path, and the electrolysis path is used for electrolysis of metal particles in the to-be-detected powder; and detecting the charging current of the electrolysis path, and determining the information of the metal particles contained in the to-be-detected powder according to the charging current and the preset electrolysis voltage. According to the embodiment of the invention, the detection efficiency and detection reliability of the metal particles can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a method, device and system for detecting metal particles in powder materials. Background Art

[0002] In battery manufacturing, if the cathode (or positive electrode) powder material contains metal particle impurities, the manufactured battery cells will have abnormal self-discharge of the battery cells, etc., affecting the quality of the battery cells. Therefore, it is crucial to detect metal particles in battery powder materials.

[0003] In the related art, metal particle detection is performed by subjecting metal particle impurities in the powder material to inductively coupled plasma (ICP) testing after pickling.

[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 method, device and system for detecting metal particles in powder materials, which can solve the problem of low detection efficiency of the detection method in the related art.

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

[0007] Mixing a conductive liquid with the powder material to be detected evenly to obtain a mixed liquid; wherein, an electrode component is arranged 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 being used for electrolysis of metal particles in the powder material to be detected;

[0009] Detecting the charging current of the electrolysis path, and determining information about metal particles contained in the powder material to be detected according to the charging current and the preset electrolysis voltage.

[0010] In the embodiments of the present application, by mixing a conductive liquid with a temperature greater than or equal to the preset electrolysis temperature evenly with the powder material to be detected, the electrolysis speed of metal particles in the powder material to be detected can be increased. Further, by applying a preset electrolysis voltage to the electrode component arranged in the mixed liquid to form an electrolysis path for electrolysis of metal particles in the powder material to be detected, and detecting the charging current of the electrolysis path, and determining information about metal particles contained in the powder material to be detected according to the charging current and the preset electrolysis voltage, complicated pretreatment operation steps such as pickling are not required, which can not only improve the detection efficiency of metal particles, but also the detection result can better represent the actual metal particle situation in the powder material to be detected, thereby improving the detection efficiency and detection reliability of metal particles.

[0011] In some embodiments, determining information about metal particles contained in a powder to be measured according to a charging current and a preset electrolysis voltage includes:

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

[0013] If there is a leakage current in the charging current, determining the types of metal particles contained in the powder to be measured according to the preset electrolysis voltage, and determining the content of metal particles contained in the powder to be measured according to the information about the leakage current.

[0014] In the embodiments of the present application, by detecting whether there is a leakage current in the charging current; further, if there is a leakage current in the charging current, determining the types of metal particles contained in the powder to be measured according to the preset electrolysis voltage, and determining the content of metal particles contained in the powder to be measured according to the information about the leakage current, by combining the information about the preset electrolysis voltage and the leakage current, the information about the metal particles contained in the powder to be measured can be accurately and conveniently determined.

[0015] In some embodiments, the information about the leakage current includes the magnitude and frequency of the leakage current. Determining the content of metal particles contained in the powder to be measured according to the information about the leakage current includes:

[0016] According to the magnitude and frequency of the leakage current, querying the corresponding relationship between the preset reference leakage current magnitude and frequency and the reference metal particle content, and determining the reference metal particle content corresponding to the magnitude and frequency of the leakage current;

[0017] Determining the content of metal particles contained in the powder to be measured according to the reference metal particle content.

[0018] In some embodiments, the information about the leakage current includes the area of the leakage current. Determining the content of metal particles contained in the powder to be measured according to the information about the leakage current includes:

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

[0020] Determining the content of metal particles contained in the powder to be measured according to the reference metal particle content.

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

[0022] According to the preset electrolysis voltage, querying the corresponding relationship between the preset reference electrolysis voltage and the reference metal particle types, and determining the reference metal particle types corresponding to the preset electrolysis voltage;

[0023] Determining the types of metal particles contained in the powder to be measured according to the reference metal particle types corresponding to the preset electrolysis voltage.

[0024] In some embodiments, a preset electrolysis voltage is applied to the electrode component to form an electrolysis path, including:

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

[0026] Correspondingly, detecting the 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, including:

[0027] Respectively detecting different charging currents of the electrolysis path corresponding to different preset electrolysis voltages, and determining information about 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.

[0028] In the embodiments of the present application, by applying different preset electrolysis voltages to the electrode component in ascending order to respectively form corresponding electrolysis paths. Further, by respectively detecting different charging currents of the electrolysis path corresponding to different preset electrolysis voltages, and determining information about 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, information about different metal particles in the powder to be tested can be very conveniently detected, which is beneficial to further improving the detection efficiency of metal particles.

[0029] In some embodiments, the method further includes: heating the conductive liquid to a preset electrolysis temperature to facilitate better electrolysis of metal particles in the powder to be tested during the charging process of the electrode component, which is beneficial to further improving the detection efficiency of metal particles.

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

[0031] Among them, 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 containing space of the containing 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 containing space of the containing component and is connected to the electrolysis power source;

[0034] 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 for electrolysis of 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 information about metal particles contained in the powder to be measured.

[0036] In the embodiment of the present application, by mixing the conductive liquid with a temperature greater than or equal to the preset electrolysis temperature in the accommodating component and the powder to be measured evenly through the stirring component, the electrolysis speed of the metal particles in the powder to be measured can be accelerated. Further, a preset electrolysis voltage is applied to the electrode component placed in the accommodating component through the electrolysis power source to form an electrolysis path for the electrolysis of the metal particles in the powder to be measured, and the charging current of the electrolysis path is detected through the current detection component, so as to determine the information about the metal particles contained in the powder to be measured according to the charging current and the preset electrolysis voltage. In this way, without complicated pretreatment operation steps such as pickling, it can not only improve the detection efficiency of metal particles, but also its detection result can better characterize the actual metal particle situation in the powder to be measured, thereby improving the detection efficiency and detection reliability of metal particles.

[0037] In some embodiments, the electrode component includes: a plurality of positive electrode components and corresponding 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;

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

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

[0040] In the embodiment of the present application, by arranging a plurality of positive electrode components and corresponding negative electrode components at intervals in the accommodating space of the accommodating component, 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 a preset electrolysis voltage to the plurality of positive electrode components and the corresponding plurality of negative electrode components respectively to form a plurality of electrolysis paths respectively, and the current detection component is specifically used to detect the charging current of each electrolysis path respectively. Since the plurality of electrolysis paths formed in the embodiment of the present application are in a parallel relationship, it can reduce the transmission path and transmission resistance. Therefore, the embodiment of the present application is beneficial to further improving the detection efficiency of metal particles.

[0041] In some embodiments, the device further includes a heating component for heating the temperature of the conductive liquid in the accommodating component to the preset electrolysis temperature, so as to facilitate the better electrolysis of the metal particles in the powder to be measured during the charging process of the electrode component, thereby being beneficial to further improving the detection efficiency of metal particles.

[0042] In some embodiments, the device further includes a cover member corresponding to the accommodating member. The accommodating member and the cover member are hermetically arranged, and the cover member is provided with sealing through holes for the electrode member and the stirring part of the stirring member to pass through respectively, so as to facilitate the process of detecting metal particles in the powder to be tested. Not only can pollutants be prevented from entering the accommodating member as much as possible, but also liquid loss in the conductive liquid can be prevented as much as possible, which is beneficial to further improving the detection accuracy of metal particles.

[0043] In some embodiments, the stirring member is a mechanical rotation stirring member or a vibration stirring member.

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

[0045] The current detection component is specifically configured to respectively detect different charging currents of the electrolytic paths corresponding to different preset electrolytic voltages.

[0046] In the embodiments of the present application, the electrolytic power source component applies different preset electrolytic voltages to the electrode component in ascending order to respectively form corresponding electrolytic paths, and the current detection component respectively detects different charging currents of the electrolytic paths corresponding to different preset electrolytic voltages, 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 electrolytic voltages of the electrolytic paths corresponding to different preset electrolytic voltages. It can be seen that the embodiments of the present application can very conveniently detect the information of different metal particles in the powder to be tested, which is beneficial 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, which includes an electronic device and a powder metal particle detection device as described in any one of the second aspects;

[0048] Wherein, the electronic device is configured to obtain the charging current of the electrolytic path from the powder metal particle detection device, and determine the information of the metal particles contained in the powder to be tested according to the charging current and the preset electrolytic voltage.

[0049] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically given below. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become apparent to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be a limitation of the present application. Also, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

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

[0052] Figure 2 It is a schematic flow diagram of a powder metal particle detection method provided by some embodiments of the present application;

[0053] Figure 3A It is a schematic flow diagram of a powder metal particle detection method provided by other embodiments of the present application;

[0054] Figure 3B It is a schematic diagram of the charging current of any electrolytic path under a preset electrolytic voltage provided by some embodiments of the present application;

[0055] Figure 4 It is a schematic structural diagram of a powder metal particle detection device provided by some embodiments of the present application;

[0056] Figure 5 It is a schematic structural diagram of a powder metal particle detection device provided by other embodiments of the present application;

[0057] Figure 6 It is a schematic structural diagram of a powder metal particle detection device provided by other embodiments of the present application;

[0058] Figure 7 It is a schematic structural diagram of a powder metal particle detection device provided by other embodiments of the present application;

[0059] Figure 8 It is a schematic structural diagram of a powder metal particle detection device provided by other embodiments of the present application;

[0060] Figure 9 It is a schematic flow diagram of a powder metal particle detection method provided by other embodiments of the present application;

[0061] Figure 10 It is a schematic structural diagram of a powder metal particle detection system provided by some embodiments of the present application. Detailed Embodiments

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

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the term "comprising" and any variation thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

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

[0065] It should be noted that, for the convenience of description, the following embodiments take the powder metal particle detection method, device and system in the embodiments of this application applied to the application scenario of detecting metal particles in battery powder as an example for description. It should be understood that when the powder metal particle detection method, device and system in the embodiments of this application are applied to other scenarios, their implementation principles and technical effects are similar.

[0066] In the related art, metal particle detection is carried out by means of ICP testing after pickling the metal particle impurities in the powder. However, the related art has the problem of low detection efficiency.

[0067] In order to solve the problem of low detection efficiency in the related art, this application proposes that by directly adding the powder to be tested into the conductive liquid whose temperature reaches the preset electrolysis temperature and mixing the conductive liquid and the powder to be tested evenly, the electrolysis speed of the metal particles in the powder to be tested can be accelerated. Further, by applying a preset electrolysis voltage to the electrode component arranged in the mixed liquid to form an electrolysis path for the metal particles in the powder to be tested to undergo electrolysis, and detecting the charging current of the electrolysis path, so as to determine the information of the metal particles contained in the powder to be tested according to the charging current and the preset electrolysis voltage, without complicated pretreatment operation steps such as pickling, not only can the detection efficiency of metal particles be improved, but also the detection result can better represent the real metal particle situation in the powder to be tested, thereby improving the detection efficiency and detection reliability of metal particles.

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

[0069] The electrolysis of metal particles (or simply referred to as metal particle electrolysis) involved in the embodiments of this application refers to the process of using the electrolysis principle to make metal particles undergo oxidation-reduction reactions in an electrolyte solution (or simply referred to as electrolyte or conductive liquid) under the action of direct current, so as to achieve the purposes of metal dissolution, deposition, and / or purification, etc.

[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) involved in the embodiments of the present application refers to the minimum applied voltage required for the corresponding metal to undergo an electrolysis reaction in an electrolyte solution, also known as the decomposition voltage. It is the power source that drives the redox reaction of metal ions on the electrode. The electrolysis reaction can only continue 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 explain 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. Figure 1 As shown, a battery cell may generally include but is not limited to: a positive electrode, a separator, a negative electrode, and an electrolyte solution; when a battery cell contains metal particle impurities, the metal particle impurities will be oxidized and dissolved at the positive end -> diffuse -> gradually form dendrites at the negative electrode side. As the metal particle impurities further dissolve, the dendrites generated at the negative electrode side become larger and larger, and may pierce the separator, resulting in a small short circuit between the positive and negative electrodes, and generating leakage current.

[0075] In some embodiments, Figure 2 A schematic diagram of a powder metal particle detection method provided in some embodiments of the present application, such as Figure 2 As shown, the method of the embodiment of the present application may include the following steps:

[0076] Step S201, uniformly mixing 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] In order to promote electrolysis of metal particles in the powder to be tested, the temperature of the conductive liquid in the embodiment of the present application can be greater than or equal to the preset electrolysis temperature, which is conducive to improving the electrolysis efficiency of metal particle impurities. Exemplarily, 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] The mixed liquid in the embodiment of the present application may be provided with an electrode component to facilitate the 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 mixed evenly to obtain a mixed liquid, so as to increase the probability of contact between the conductive liquid, the powder to be tested and the electrode component, which is conducive to improving the electrolysis efficiency of the metal particle impurities in the powder to be tested.

[0080] Step S202: Apply a preset electrolysis voltage to the electrode component to form an electrolysis path for electrolyzing 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 as to form an electrolysis path between the electrode component, the conductive liquid and the powder to be tested, enabling the metal particles in the powder to be tested to be fully electrolyzed under the electrolysis path.

[0082] It should be noted that when the metal particles in the powder to be tested are electrolyzed, 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 the voltage can be applied to the electrode component according to the preset electrolysis voltages corresponding to the possible types of metal particles, so as to detect whether the powder to be tested contains this type of metal particle.

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

[0085] Step S203: Detect the charging current of the electrolysis path, and determine the information of the metal particles contained in the powder to be tested according to the charging current and the preset electrolysis voltage.

[0086] In this step, the charging current of the electrolysis path formed in the above step S202 can be detected, and according to the charging current and the preset electrolysis voltage, the information of the metal particles contained in the powder to be tested can be determined. Exemplarily, the information of the metal particles contained in the powder to be tested may include but is not limited to the types of the 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 a possible implementation manner, the information of the metal particles contained in the powder to be tested can be determined by analyzing the change of the charging current and the preset electrolysis voltage.

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

[0089] In summary, compared with the detection method in the related art, in the embodiment of the present application, by mixing the conductive liquid with a temperature greater than or equal to the preset electrolysis temperature and the powder to be tested evenly, the electrolysis speed of the metal particles in the powder to be tested can be accelerated. Further, by applying a preset electrolysis voltage to the electrode component provided in the mixed liquid to form an electrolysis path for the metal particles in the powder to be tested to electrolyze, and detecting the charging current of the electrolysis path, and determining the information of the metal particles contained in the powder to be tested according to the charging current and the preset electrolysis voltage, there is no need for complicated pretreatment operation steps such as pickling, which can not only improve the detection efficiency of metal particles, but also the detection result can better characterize the real 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 various types of metal particles, the preset electrolysis voltage in the above step S202 may include the preset electrolysis voltages corresponding to various types of metal particles, and the above step S202 may include: applying different preset electrolysis voltages to the electrode component in ascending order to form corresponding electrolysis paths respectively.

[0091] In the embodiment of the present application, different preset electrolysis voltages can be applied to the electrode component in ascending order according to the preset electrolysis voltages corresponding to different possible metal particle types to form corresponding electrolysis paths respectively, so as to facilitate detecting whether the powder to be tested includes these types of metal particles.

[0092] For example, assume 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 the corresponding electrolysis path 1 and continue for the first preset duration, so that the copper particle impurities in the powder to be tested are completely electrolyzed, so as to facilitate detecting whether the powder to be tested includes copper particle impurities.

[0093] Further, a preset electrolysis voltage 2 can be applied to the electrode component to form a corresponding electrolysis path 2 and last for a second preset time period, so that the iron particle impurities in the powder to be measured are completely electrolyzed, facilitating the detection of whether the powder to be measured contains iron particle impurities.

[0094] Further, a preset electrolysis voltage 3 can be applied to the electrode component to form a corresponding electrolysis path 3 and last for a third preset time period, so that the stainless steel particle impurities in the powder to be measured are completely electrolyzed, facilitating the detection of whether the powder to be measured contains stainless steel particle impurities. Among them, 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 measured according to the different charging currents corresponding to different preset electrolysis voltages of the electrolysis path and the different preset electrolysis voltages.

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

[0097] It should be noted that the method of determining information about the metal particles contained in the powder to be measured according to the charging current corresponding to the electrolysis path at the preset electrolysis voltage and the preset electrolysis voltage can refer to the relevant implementable methods of "determining information about the metal particles contained in the powder to be measured according to the charging current and the preset electrolysis voltage" in step S203, and will not be elaborated in the embodiment of the present application.

[0098] For example, the information about the copper particles included in the powder to be measured can be determined by detecting the charging current 1 corresponding to the electrolysis path 1 at the preset electrolysis voltage 1 and according to the charging current 1 corresponding to the electrolysis path 1 at the preset electrolysis voltage 1 and the preset electrolysis voltage 1.

[0099] Further, the information about the iron particles included in the powder to be measured can be determined by detecting the charging current 2 corresponding to the electrolysis path 2 at the preset electrolysis voltage 2 and according to the charging current 2 corresponding to the electrolysis path 2 at the preset electrolysis voltage 2 and the preset electrolysis voltage 2.

[0100] Further, the information about the stainless steel particles included in the powder to be measured can be determined by detecting the charging current 3 corresponding to the electrolysis path 3 at the preset electrolysis voltage 3 and according to the charging current 3 corresponding to the electrolysis path 3 at the preset electrolysis voltage 3 and the preset electrolysis voltage 3.

[0101] In summary, in the embodiments of the present application, by applying different preset electrolysis voltages to the electrode components in ascending order, corresponding electrolysis paths are respectively formed. Further, by respectively detecting different charging currents of the electrolysis paths corresponding to different preset electrolysis voltages, and determining the information of the metal particles contained in the powder to be tested based on the different charging currents and different preset electrolysis voltages of the electrolysis paths corresponding to different preset electrolysis voltages, the information of different metal particles in the powder to be tested can be detected very conveniently, which is beneficial to further improving the detection efficiency of metal particles.

[0102] In some embodiments, before mixing the conductive liquid and the powder to be tested evenly, the method of the embodiments of the present application may further include the following steps: heating the conductive liquid to a preset electrolysis temperature, so as to facilitate the electrolysis of metal particles in the powder to be tested better during the charging process of the electrode components, which is beneficial to further improving the detection efficiency of metal particles.

[0103] In some embodiments, Figure 3A FIG. is a schematic flow chart of a method for detecting metal particles in powder provided in some other embodiments of the present application. The embodiments of the present application make an exemplary introduction and description of the related content of "determining the information of the metal particles contained in the powder to be tested according to the charging current and the preset electrolysis voltage" in step S203 above. As Figure 3A shown, the method of the embodiments of the present application may include the following steps:

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

[0105] In this step, by detecting whether there is a leakage current (or called a mutant current or a jump current) in the charging current of the electrolysis path.

[0106] Figure 3B FIG. is a schematic diagram of the charging current of any electrolysis path at a preset electrolysis voltage provided in some embodiments of the present application. As Figure 3B shown, there will be a leakage current in 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 at certain moments.

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

[0108] In this step, if there is a 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 information of the leakage current.

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

[0110] Another exemplarily, the information about the leakage current involved in the embodiments of the present application may include, but is not limited to, the area of the leakage current. Among them, the area of the leakage current may refer to the area corresponding to the part 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 indicates that the powder to be tested does not contain metal particle impurities corresponding to the current preset electrolysis voltage. The magnitude of the preset electrolysis voltage can be further adjusted to facilitate detecting whether the powder to be tested contains other types of metal particle impurities.

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

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

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

[0115] In the embodiments of the present application, the corresponding relationship between the preset reference electrolysis voltage and the reference metal particle types can be queried according to the preset electrolysis voltage, the reference metal particle type corresponding to the preset electrolysis voltage in the corresponding relationship between the preset reference electrolysis voltage and the reference metal particle types is determined, and the reference metal particle type corresponding to the preset electrolysis voltage can be used as the types of metal particles contained in the powder to be tested.

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

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

[0118] In some embodiments, the embodiments of the present application exemplarily introduce and explain the relevant content of "determining the content of metal particles contained in the powder to be measured according to the information of the leakage current" in the above step S2032.

[0119] In a possible implementation manner, when the information of the leakage current includes the magnitude and frequency of the leakage current, according to the magnitude and frequency of the leakage current, query the corresponding relationship between the preset reference leakage current magnitude-frequency and the reference metal particle content, determine the reference metal particle content corresponding to the magnitude and frequency of the leakage current, and determine the content of the metal particles contained in the powder to be measured according to the reference metal particle content.

[0120] The corresponding relationship between the preset reference leakage current magnitude-frequency and the reference metal particle content involved in the embodiments of the present application may include, but is not limited to, the corresponding relationship between different reference leakage current magnitude-frequencies and the corresponding reference metal particle contents.

[0121] In the embodiments of the present application, according to the magnitude and frequency of the leakage current, query the corresponding relationship between the preset reference leakage current magnitude-frequency and the reference metal particle content, determine the reference metal particle content corresponding to the magnitude and frequency of the leakage current in the corresponding relationship between the preset reference leakage current magnitude-frequency and the reference metal particle content, and the reference metal particle content may be used as the content of the metal particles contained in the powder to be measured.

[0122] In another possible implementation manner, when the information of the leakage current includes the area of the leakage current, 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, determine the reference metal particle content corresponding to the area of the leakage current, and determine the content of the metal particles contained in the powder to be measured according to the reference metal particle content.

[0123] The corresponding relationship 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 corresponding relationship between different reference leakage current areas and the corresponding reference metal particle contents.

[0124] In the embodiments of the present application, 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, determine the reference metal particle content corresponding to the area of the leakage current in the corresponding relationship between the preset reference leakage current area and the reference metal particle content, and the reference metal particle content corresponding to the area of the leakage current may be used as the content of the metal particles contained in the powder to be measured.

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

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

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

[0128] In some embodiments, Figure 4 is a schematic structural diagram of a powder metal particle detection device provided in some embodiments of the present application. As Figure 4 shown, the powder metal particle detection device in the embodiments 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 containing component 42 in the embodiments of the present application can be used to contain a conductive liquid ( Figure 4 not shown in the figure) and the powder to be tested ( Figure 4 not shown in the figure). Among them, in order to promote the electrolysis of metal particles in the powder to be tested, the temperature of the conductive liquid in the embodiments of the present application is greater than or equal to the preset electrolysis temperature.

[0130] Exemplarily, the containing component 42 in the embodiments of the present application can select materials that are resistant to high temperature and corrosion (or materials with good corrosion resistance). For example, the materials of the containing component 42 may include, but are not limited to, any of the following materials: polytetrafluoroethylene, glass.

[0131] Exemplarily, after the temperature of the conductive liquid is preheated to be greater than or equal to the preset electrolysis temperature, it can be added to the containing component 42. Another exemplarily, the temperature of the conductive liquid in the containing component 42 can be heated to be greater than or equal to the preset electrolysis temperature by a heating component. Of course, the temperature of the conductive liquid can also be made greater than or equal to the preset electrolysis temperature by other means.

[0132] In the embodiment of the present application, the stirring component 41 can be placed in the accommodation space of the accommodation component 42, can provide kinetic energy for the conductive liquid and the powder to be tested in the accommodation 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 through the stirring of the stirring component 41, the movement opportunity (or movement efficiency) of the metal particles in the powder to be tested can be increased, and the contact opportunity (or probability) between the metal particles in the powder to be tested and the electrode component can be improved, which is conducive to improving the electrolysis efficiency of the metal particles in the powder to be tested.

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

[0135] In the embodiment of the present application, the electrode component 43 can be placed in the accommodation space of the accommodation 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 accommodation space of the accommodation component 42, which not only facilitates avoiding the shaking of the electrode component 43 during the stirring of the conductive liquid and the powder to be tested by the stirring component 41, affecting the detection reliability, but also can avoid the situation of short circuit caused by the contact of the positive and negative electrodes in the electrode component 43.

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

[0138] In the embodiment of the present application, the electrolysis power source 44 can be the power source for the electrolysis of 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 (for the electrolysis of the metal particles in the powder to be tested) 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 undergo electrolysis under the electrolysis path.

[0139] Exemplarily, 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 micro-current, so as to improve the electrolysis efficiency of the metal particle impurities. For example, the preset micro-current can include but is not limited to 5 mA or 10 mA.

[0140] Exemplarily, the electrolysis power source 44 involved in the embodiment of the present application can include but is not limited to a charge and discharge machine or an electrochemical test device.

[0141] It should be noted that the electrolysis power source 44 can also be independent of the powder metal particle detection device (i.e., the electrolysis power source 44 can be arranged outside the powder metal particle detection device) to provide electrical energy for the powder metal particle detection device.

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

[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 according to the charging current and the preset electrolysis voltage.

[0144] Exemplarily, the current detection component 45 can be a component independent of the electrolysis power source 44, or can be a component integrated in the electrolysis power source 44. It should be understood that Figure 4 is shown by taking the current detection component 45 integrated in the electrolysis power source 44 as an example.

[0145] It should be understood that for the specific manner of determining the information of the metal particles contained in the powder to be tested according to the charging current and the preset electrolysis voltage, reference can be made to the relevant content in the above-mentioned embodiment of the powder metal particle detection method of the present application, and the embodiment of the present application does not limit this.

[0146] In summary, compared with the detection methods in the related art, in the embodiment of the present application, by mixing the conductive liquid with a temperature greater than or equal to the preset electrolysis temperature in the accommodating component with the powder to be tested evenly through the stirring component, the electrolysis speed of the metal particles in the powder to be tested can be accelerated. Further, by applying a preset electrolysis voltage to the electrode component placed in the accommodating component through the electrolysis power source to form an electrolysis path for the metal particles in the powder to be tested to undergo electrolysis, and detecting the charging current of the electrolysis path through the current detection component, so as to determine the information of the metal particles contained in the powder to be tested according to the charging current and the preset electrolysis voltage, there is no need for complicated pretreatment operation steps such as pickling, which can not only improve the detection efficiency of metal particles, but also the detection result can better characterize the real 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 component 43 in ascending order to form corresponding electrolysis paths respectively.

[0148] In the 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 of the preset electrolysis voltages corresponding to different possible metal particle types, so as to respectively form corresponding electrolysis paths, facilitating the detection of whether the powder to be tested contains 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 different charging currents of the electrolysis paths corresponding to different preset electrolysis voltages, 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 of the electrolysis paths corresponding to different preset electrolysis voltages.

[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 this preset electrolysis voltage, so as to determine the information of the metal particles contained in the powder to be tested according to the charging current and this preset electrolysis voltage of the electrolysis path corresponding to this preset electrolysis voltage.

[0151] In summary, in the embodiment of the present application, by the electrolysis power source component applying different preset electrolysis voltages to the electrode component in ascending order to respectively form corresponding electrolysis paths, and the current detection component respectively detecting different charging currents of the electrolysis paths corresponding to different preset electrolysis voltages, 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 of the electrolysis paths corresponding to 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 beneficial to further improving the detection efficiency of metal particles.

[0152] In some embodiments, Figure 5 is a schematic structural diagram of a powder metal particle detection device provided in another embodiment of the present application. As Figure 5 shown, in order to further improve the detection efficiency of metal particles, the electrode component 43 in the embodiment of the present application can include, but is not limited to, a plurality of positive electrode components 43+ arranged at intervals and corresponding negative electrode components 43-, and the interval distance between each positive electrode component 43+ and the corresponding negative electrode component 43- can be less than or equal to a preset interval distance, which is beneficial to improving the electrolysis efficiency of metal particle impurities. Exemplarily, the preset interval distance can be 4.5 cm or 5 cm; of course, the preset interval distance can also be other values (the distance between the positive and negative electrode components should be as small as possible as long as the positive and negative electrode components do not overlap).

[0153] Each positive electrode component 43+ and the corresponding negative electrode component 43- in the embodiments of the present application can be referred to as a group of electrode components. Exemplarily, each positive electrode component 43+ can be respectively connected to the positive electrode of the electrolytic power source component 44, and each negative electrode component 43- can be respectively connected to the negative electrode of the electrolytic power source component 44.

[0154] Correspondingly, the electrolytic power source component 44 in the embodiments of the present application can be specifically used for: applying a preset electrolytic voltage to a plurality of positive electrode components 43+ and the corresponding plurality of negative electrode components 43- respectively to form a plurality of electrolytic paths respectively.

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

[0156] Exemplarily, if the powder to be measured is a positive electrode powder, since the positive electrode powder itself has weak conductivity, and under the condition that the temperature of the conductive liquid is greater than or equal to the preset electrolytic temperature and the action of the stirring component, it can accelerate the movement of metal particles in the positive electrode powder to the negative electrode component side, forming an instantaneous leakage current, that is, a current change will occur. Among them, the fluidity of the powder to be measured and the conductive liquid is enhanced, which will increase the electrolysis efficiency of metal particles in the powder to be measured.

[0157] It should be understood that the multiple electrolytic paths are in a parallel relationship. By paralleling the multiple electrolytic paths, the transmission path and transmission resistance can be reduced. Therefore, it is beneficial to further improve the detection efficiency of metal particles.

[0158] Correspondingly, the current detection component 45 in the embodiments of the present application can be specifically used for detecting the charging current of each electrolytic path respectively, so as to determine the information of metal particles contained in the powder to be measured according to the charging current of any electrolytic path and the preset electrolytic voltage.

[0159] In summary, in the embodiments of the present application, by arranging a plurality of positive electrode components and the corresponding plurality of negative electrode components at intervals in the accommodation space of the accommodation component, and the interval distance between each positive electrode component and the corresponding negative electrode component is less than or equal to the preset interval distance, the electrolytic power source component is specifically used for applying a preset electrolytic voltage to the plurality of positive electrode components and the corresponding plurality of negative electrode components respectively to form a plurality of electrolytic paths respectively, and the current detection component is specifically used for detecting the charging current of each electrolytic path. Since the multiple electrolytic paths formed in the embodiments of the present application are in a parallel relationship, it can reduce the transmission path and transmission resistance. Therefore, the embodiments of the present application are beneficial to further improve the detection efficiency of metal particles.

[0160] In some embodiments, Figure 6 is a schematic structural diagram of a powder metal particle detection device provided in other embodiments of the present application. As Figure 6 shown, the powder metal particle detection device according to the embodiments of the present application may further include a heating component 46 for heating the temperature of the conductive liquid in the accommodating component 42 to a preset electrolysis temperature, so as to facilitate better electrolysis of metal particles in the powder to be measured during the charging process of the electrode component 43, thereby being beneficial to further improving the detection efficiency of metal particles.

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

[0162] Exemplarily, the shape of the accommodating 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] Exemplarily, the heating component 46 may be disposed at the bottom of the accommodating space of the accommodating component 42, or disposed around the accommodating space of the accommodating component 42, so as to heat the temperature of the conductive liquid in the accommodating component 42 to the preset electrolysis temperature. It should be understood that Figure 6 is illustrated by taking the heating component 46 being disposed at the bottom of the accommodating space of the accommodating component 42 as an example.

[0164] In some embodiments, Figure 7 is a schematic structural diagram of a powder metal particle detection device provided in other embodiments of the present application. As Figure 7 shown, the powder metal particle detection device according to the embodiments of the present application may further include a cover body component 47 corresponding to the accommodating component 42. Among them, a sealing arrangement may be provided between the accommodating component 42 and the cover body component 47, and the cover body component 47 may be provided with sealing through holes for the electrode component 43 and the stirring part of the stirring component 41 to pass through respectively, so as to not only prevent contaminants from entering the accommodating component 42 as much as possible during the process of detecting metal particles in the powder to be measured, but also prevent liquid loss in the conductive liquid as much as possible, thereby being beneficial to further improving the detection accuracy of metal particles.

[0165] Exemplarily, a sealing arrangement may be achieved between the accommodating component 42 and the cover body component 47 by using a sealing member (such as rubber, etc.), or by using an interference snap-fastening type, or by using a screw-on cap type.

[0166] Exemplarily, the sealing method of the sealing through holes may include, but is not limited to, any one of the following: sealing member sealing method, interference snap-fastening type sealing method, screw-on cap type sealing method.

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

[0168] In some embodiments, Figure 8 FIG. is a schematic structural diagram of a powder metal particle detection device provided in some other embodiments of the present application. On the basis of the above embodiments, in the embodiments of the present application, the current detection component 45 is integrated in the electrolytic power source 44, and the electrode component 43 includes three positive electrode components 43+ and corresponding three negative electrode components 43- (i.e., three groups of electrode components) that are spaced apart. By way of example, the overall structure of the powder metal particle detection device is introduced and illustrated. As Figure 8 shown, the powder metal particle detection device in the embodiments of the present application may include: a stirring component 41, an accommodation component 42, an electrode component 43, an electrolytic power source 44 (including a current detection component 45), a heating component 46, and a cover component 47.

[0169] Figure 9 FIG. is a schematic flowchart of a powder metal particle detection method provided in some other embodiments of the present application. For ease of understanding, the embodiments of the present application introduce and illustrate the process of detecting a certain type of metal particle impurity that may exist. Combining Figure 8 and Figure 9 shown, the method in the embodiments of the present application may include the following steps:

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

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

[0172] Step S902: Place the accommodation assembly 42 on the heating component 46 so that the heating component 46 heats the temperature of the conductive liquid in the accommodation component 42 to a preset electrolytic temperature.

[0173] Step S903: Insert the stirring component 41 into the accommodation space of the accommodation component 42 so that the stirring component 41 fully wets and disperses the conductive liquid and the powder to be tested in the accommodation component 42 evenly.

[0174] Step S904: The electrolytic power source component 44 can apply a preset electrolytic voltage corresponding to the above metal particles to multiple groups of electrode components (positive electrode component 43+ and corresponding negative electrode component 43-) respectively, so as to form corresponding electrolytic paths between the positive electrode component 43+ in multiple groups of electrode components, the conductive liquid, the powder to be tested, and the negative electrode component 43- respectively, and detect the charging current of each electrolytic path respectively.

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

[0176] It should be noted that the realizable ways of each step in the embodiments of the present application can refer to the relevant content in the embodiments of the above powder metal particle detection method or the above powder metal particle detection device embodiments of the present application, and will not be elaborated here.

[0177] It should be understood that further, the magnitude of the preset electrolytic voltage can also be adjusted to facilitate detecting whether other types of metal particle impurities are included in the powder to be tested, and its detection process can refer to the above Step S904 - Step S905.

[0178] In summary, in the powder metal particle detection device and the 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 through the stirring of the stirring component and the heating of the heating component, the electrolysis speed of the metal particles in the powder to be tested can be accelerated. In addition, through the multi-electrode component structure, not only can the disturbance medium be electrolyzed uniformly and comprehensively, 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, by detecting the charging current of each electrolytic path through the electrolytic power source component, so as to determine the information of the metal particles contained in the powder to be tested according to the charging current of any electrolytic path and the preset electrolytic voltage, there is no need for complicated pretreatment operation steps such as pickling, which can not only improve the detection efficiency of metal particles, but also make the detection result more representative of the real metal particle situation in the powder to be tested, thereby improving the detection efficiency and detection reliability of metal particles. In addition, through the powder metal particle detection device and the 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 material scrapping caused by excessive powder metal particles, thereby improving the detectability of metal particles and the reliability of the powder at the same time.

[0179] It should be understood that although the steps in the flowcharts involved in the above embodiments are shown in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless specifically stated herein, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, at least some of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least some of the steps or stages in other steps or other steps.

[0180] In some embodiments, Figure 10 is a schematic structural diagram of a powder metal particle detection system provided in some embodiments of the present application. As Figure 10 shown, the powder metal particle detection system of the embodiments of the present application may include, but is not limited to, an electronic device 101 and a powder metal particle detection device 102. Among them, the structure of the powder metal particle detection device 102 may refer to the relevant content in any of the above powder metal particle detection device embodiments of the present application, and will not be elaborated here.

[0181] In the embodiments of the present application, the electronic device 101 may be used to obtain the charging current of the electrolytic path from the powder metal particle detection device 102, and determine the information of the metal particles contained in the powder to be tested according to the charging current and the preset electrolytic voltage.

[0182] It should be noted that the specific implementation manner for the electronic device 101 to determine the information of the metal particles contained in the powder to be tested according to the charging current and the preset electrolytic voltage may refer to the relevant content in any of the above powder metal particle detection method embodiments of the present application. Their implementation principles and technical effects are similar, and will not be elaborated here.

[0183] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method for detecting powder metal particles, characterized in that, The method includes: Mixing the conductive liquid and the powder to be measured evenly to obtain a mixed liquid; wherein, an electrode component is arranged 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, and the electrolysis path is used for electrolyzing metal particles in the powder to be measured; Detecting the charging current of the electrolysis path, and determining information about the metal particles contained in the powder to be measured according to the charging current and the preset electrolysis voltage.

2. The powder metal particle detection method according to claim 1, characterized in that, The determining information about the metal particles contained in the powder to be measured according to the charging current and the preset electrolysis voltage includes: Detecting whether there is a leakage current in the charging current; If there is a leakage current in the charging current, determining the types of metal particles contained in the powder to be measured according to the preset electrolysis voltage, and determining the content of the metal particles contained in the powder to be measured according to the information about the leakage current.

3. The powder metal particle detection method according to claim 2, characterized in that, The information about the leakage current includes the magnitude and frequency of the leakage current, and the determining the content of the metal particles contained in the powder to be measured according to the information about the leakage current includes: Querying the corresponding relationship between the preset reference leakage current magnitude and frequency and the reference metal particle content according to the magnitude and frequency of the leakage current, and determining the reference metal particle content corresponding to the magnitude and frequency of the leakage current; Determining the content of the metal particles contained in the powder to be measured according to the reference metal particle content.

4. The powder metal particle detection method according to claim 2, characterized in that, The information about the leakage current includes the area of the leakage current, and the determining the content of the metal particles contained in the powder to be measured according to the information about the leakage current includes: Querying the corresponding relationship between the preset reference leakage current area and the reference metal particle content according to the area of the leakage current, and determining the reference metal particle content corresponding to the area of the leakage current; Determining the content of the metal particles contained in the powder to be measured according to the reference metal particle content.

5. The powder metal particle detection method according to any one of claims 2-4, characterized in that, The determining the types of metal particles contained in the powder to be measured according to the preset electrolysis voltage includes: Querying the corresponding relationship between the preset reference electrolysis voltage and the reference metal particle types according to the preset electrolysis voltage, and determining the reference metal particle types corresponding to the preset electrolysis voltage; Determining the types of metal particles contained in the powder to be measured according to the reference metal particle types corresponding to the preset electrolysis voltage.

6. The powder metal particle detection method according to any one of claims 1-4, characterized in that, The applying a preset electrolysis voltage to the electrode component to form an electrolysis path includes: Applying different preset electrolysis voltages to the electrode component in ascending order to respectively form corresponding electrolysis paths; Correspondingly, the detecting the charging current of the electrolysis path, and determining information about the metal particles contained in the powder to be measured according to the charging current and the preset electrolysis voltage includes: Respectively detecting the different charging currents of the electrolysis path corresponding to different preset electrolysis voltages, and determining information about the metal particles contained in the powder to be measured according to the different charging currents of the electrolysis path corresponding to different preset electrolysis voltages and different preset electrolysis voltages.

7. The powder metal particle detection method according to any one of claims 1-4, characterized in that, The method further includes: Heating the conductive liquid to the preset electrolysis temperature.

8. 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; Among them, the containing component is used to contain a conductive liquid and the powder to be tested, where the temperature of the conductive liquid is greater than or equal to a preset electrolysis temperature; The stirring component is placed in the containing space of the containing component and is used to mix the conductive liquid and the powder to be tested evenly to obtain a mixed liquid; The electrode component is placed in the containing space of the containing component and is 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; among them, the electrolysis path is used for the metal particles in the powder to be tested to undergo electrolysis; The current detection component is used to detect the charging current of the electrolysis path; among them, the charging current is used to determine the information of the metal particles contained in the powder to be tested.

9. The powder metal particle detection device according to claim 8, characterized in that, The electrode component includes: a plurality of positive electrode components and corresponding 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 negative electrode components respectively to form a plurality of electrolysis paths respectively; The current detection component is specifically used to detect the charging current of each electrolysis path respectively.

10. The powder metal particle detection device according to claim 8 or 9, characterized in that, The device further includes a heating component, which is used to heat the temperature of the conductive liquid in the containing component to the preset electrolysis temperature.

11. The powder metal particle detection device according to claim 8 or 9, characterized in that, The device further includes a cover component corresponding to the containing component, where the containing component and the cover component are hermetically arranged, and the cover component is provided with sealing through holes for the electrode component and the stirring part of the stirring component to pass through respectively.

12. The powder metal particle detection device according to claim 8 or 9, characterized in that, The stirring component is a mechanical rotation stirring component or a vibration stirring component.

13. The powder metal particle detection device according to claim 8 or 9, characterized in that, The electrolysis power source component is specifically used to: apply different preset electrolysis voltages to the electrode component in ascending order respectively to form corresponding electrolysis paths respectively; The current detection component is specifically used to detect the different charging currents of the electrolysis paths corresponding to different preset electrolysis voltages respectively.

14. A powder metal particle detection system, characterized in that, The system includes an electronic device and the powder metal particle detection device according to any one of claims 8-13; Among them, 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 according to the charging current and the preset electrolysis voltage.

Images