Device for representing floating powder on surface of pole piece

Abstract

The utility model discloses a device for representing floating powder on the surface of a pole piece, and relates to the technical field of battery production. The device for characterizing the floating powder on the surface of the pole piece comprises a base for bearing the pole piece; the first mounting rod is fixedly arranged on the base; the second mounting rod is connected with the first mounting rod; the pressing rod is connected to the second mounting rod, a pressing head is arranged at the bottom of the pressing rod, and a spring is arranged outside the pressing rod in a sleeving mode and abuts against the position between the pressing head and the second mounting rod; the cleaning piece is arranged between the pressing head and the base, a pole piece is placed between the cleaning piece and the base, and the pressing head is used for pressing the cleaning piece on the surface of the pole piece; the friction force between the pressing head and the cleaning piece is larger than that between the cleaning piece and the pole piece, the pole piece has a preset length, and the dust amount collected by the cleaning piece is the dust amount in the area, pressed by the pressing head, of the pole piece with the preset length. According to the device for representing the floating powder on the surface of the pole piece, the floating powder which is not easy to quantify can be visually represented, and the severity of the floating powder can be macroscopically judged conveniently.

Description

Technical Field

[0001] This specification relates to the field of battery manufacturing technology, and in particular to an apparatus for characterizing powder floating on the surface of electrode sheets. Background Technology

[0002] As a crucial component of batteries, the microstructure of electrodes significantly impacts lithium-ion battery performance. During the coating, rolling, and slitting processes of cylindrical battery electrodes, free-state solid particles, commonly referred to as "floating powder," easily form on the surface. Floating powder can lead to problems such as poor hitboxes, abnormal capacity, and abnormal self-discharge during battery production, resulting in suboptimal product performance. Currently, there is no effective method to characterize the severity of floating powder on electrode surfaces, causing some electrodes with severe floating powder to be rejected, resulting in defective products and affecting production line yield. Utility Model Content

[0003] In view of the shortcomings of the prior art, one object of this specification is to provide an apparatus for characterizing powder floating on the surface of electrode sheets, which can visually characterize powder that is not easy to quantify, and facilitate macroscopic judgment of the severity of powder floating.

[0004] To achieve the above objectives, this specification provides an apparatus for characterizing powder floating on the surface of electrode sheets, comprising:

[0005] A base for supporting the electrode sheets;

[0006] A first mounting rod fixedly mounted on the base;

[0007] A second mounting rod connected to the first mounting rod;

[0008] A pressure rod is connected to the second mounting rod. The bottom of the pressure rod is provided with a pressure head. A spring is provided on the outer sleeve of the pressure rod. The spring abuts against the pressure head and the second mounting rod.

[0009] A cleaning component is disposed between the pressure head and the base, and the electrode is placed between the cleaning component and the base. The pressure head is used to press the cleaning component tightly onto the surface of the electrode. The frictional force between the pressure head and the cleaning component is greater than the frictional force between the cleaning component and the electrode.

[0010] In a preferred embodiment, the electrode has a predetermined length, and the amount of dust collected by the cleaning element is the amount of dust within the area of ​​the electrode of the predetermined length that is pressed by the pressure head.

[0011] In a preferred embodiment, the second mounting rod is detachably and fixedly connected to the first mounting rod via a first adjustable buckle, the height of which is adjustable.

[0012] In a preferred embodiment, the base is horizontally positioned, and the first mounting rod is vertically positioned at one end of the base.

[0013] In a preferred embodiment, the second mounting rod is perpendicular to the first mounting rod, and the projection of the end of the second mounting rod away from the first mounting rod onto the base is close to the middle of the base.

[0014] In a preferred embodiment, the pressure rod is detachably and fixedly connected to the second mounting rod via a second adjustable buckle, and the height at which the top of the pressure rod extends beyond the second adjustable buckle is adjustable.

[0015] In a preferred embodiment, the pressure bar is perpendicular to the second mounting bar and parallel to the first mounting bar.

[0016] In a preferred embodiment, the second mounting rod has a through hole at the end away from the first mounting rod, through which the pressure rod passes; the second adjustable buckle is fixedly connected to the pressure rod and located above the through hole, and the second adjustable buckle abuts against the second mounting rod.

[0017] In a preferred embodiment, the first mounting rod, the second mounting rod, and the pressure rod are all cylindrical, with the diameter of the first mounting rod being larger than the diameter of the second mounting rod and the diameter of the pressure rod; and the length of the first mounting rod being larger than the length of the second mounting rod and the length of the pressure rod.

[0018] In a preferred embodiment, the pressure head is cylindrical in shape, and the diameter of the pressure head is larger than the diameter of the first mounting rod, the diameter of the second mounting rod, and the diameter of the pressure rod; the material of the pressure head is rubber.

[0019] In a preferred embodiment, the pressure applied by the pressure head to the cleaning element and the electrode is 15N~20N; the cleaning element includes lint-free paper or non-woven fabric. Beneficial effects

[0020] The device for characterizing surface powder on electrodes provided in this embodiment has a first mounting rod fixedly mounted on a base, a second mounting rod connected to the first mounting rod, and a pressure rod connected to the second mounting rod. The pressure rod has a pressure head at its bottom, which presses a cleaning component firmly against the electrode surface. A spring pressing against the pressure head between the pressure head and the second mounting rod applies constant pressure between the pressure head and the electrode, collecting surface powder on the electrode surface during electrode conveying. This collects microscopic dust onto the cleaning component, accurately characterizing the difficult-to-quantify surface powder and facilitating macroscopic assessment of its severity. This device can be used throughout the entire product development process, allowing for real-time tracking of the surface powder status on the electrode and enabling timely control in case of abnormalities.

[0021] The electrode sheet has a predetermined length, and the amount of dust collected by the cleaning unit is the amount of dust within the area of ​​the electrode sheet of the predetermined length that is pressed by the pressure head. To facilitate comparison of the differences in floating dust among different types of electrode sheets, all electrode sheets of different types are set to a predetermined length (i.e., equal length). When testing and comparing different electrode sheets, it is only necessary to ensure that the size of the cleaning unit is consistent. After collection, the amount of dust collected by the cleaning unit can also be weighed to quantify the amount of dust.

[0022] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be adopted. It should be understood that the scope of the embodiments of the present invention is not limited thereto.

[0023] Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0024] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, whole, step, or component, but does not exclude the presence or addition of one or more other features, wholes, steps, or components. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the device for characterizing powder floating on the surface of an electrode sheet provided in this embodiment;

[0027] Figure 2 for Figure 1Another perspective view;

[0028] Figure 3 This is a schematic diagram of the installation of a second mounting rod and a pressure rod provided in this embodiment.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Base; 2. First mounting rod; 3. Second mounting rod; 4. Pressure rod; 41. Pressure head; 5. Spring; 6. Cleaning component; 7. First adjustable buckle; 8. Second adjustable buckle; 9. Electrode; X, Electrode movement direction. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0032] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or may be interposed with another element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or may be interposed with another element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] Please see Figures 1 to 3 This application provides an apparatus for characterizing powder floating on the surface of an electrode 9, comprising: a base 1, a first mounting rod 2, a second mounting rod 3, a pressure rod 4, and a cleaning component 6.

[0035] The base 1 supports the electrode 9. The first mounting rod 2 is fixedly mounted on the base 1. The second mounting rod 3 is connected to the first mounting rod 2. The pressure rod 4 is connected to the second mounting rod 3. The bottom of the pressure rod 4 is provided with a pressure head 41. A spring 5 is sleeved on the pressure rod 4, and the spring 5 abuts against the pressure head 41 and the second mounting rod 3. The cleaning component 6 is disposed between the pressure head 41 and the base 1. The electrode 9 is placed between the cleaning component 6 and the base 1, and the pressure head 41 is used to press the cleaning component 6 firmly against the surface of the electrode 9. The frictional force between the pressure head 41 and the cleaning component 6 is greater than the frictional force between the cleaning component 6 and the electrode 9 to ensure that the cleaning component remains stationary during the electrode removal process. The pressure head is preferably made of rubber. The cleaning component can be made of lint-free paper or non-woven fabric.

[0036] The device for characterizing surface powder on electrode 9 provided in this embodiment has a first mounting rod 2 fixedly mounted on a base 1, a second mounting rod 3 connected to the first mounting rod 2, and a pressure rod 4 connected to the second mounting rod 3. The bottom of the pressure rod 4 is provided with a pressure head 41, which can press the cleaning component 6 against the surface of electrode 9. The spring 5, which abuts against the pressure head 41 and the second mounting rod 3, can apply a constant pressure between the pressure head 41 and the cleaning component 6 and electrode 9. During the electrode 9 conveying process, the surface powder on the electrode 9 is collected, and the microscopic dust is collected on the cleaning component 6, thereby accurately characterizing the surface powder that is not easy to quantify, and facilitating macroscopic judgment of the severity of the surface powder.

[0037] The electrode sheet has a predetermined length, and the amount of dust collected by the cleaning component is the amount of dust within the area of ​​the electrode sheet of the predetermined length that is pressed by the pressure head. To facilitate comparison of the differences in floating dust among different models of electrode sheets 9, all electrode sheets 9 of different models are set to a predetermined length (equal length). When testing and comparing different electrode sheets 9, it is only necessary to ensure that the size of the cleaning component 6 is consistent. After collection, the amount of dust collected by the cleaning component 6 can also be weighed to quantify the amount of dust.

[0038] This device can be used throughout the entire product development process to facilitate real-time tracking of the powder floating status on the surface of electrode 9. When an abnormality occurs, it facilitates timely control. It can characterize the powder floating on the surface of electrode 9 during the production process and assist in monitoring and controlling the powder floating situation.

[0039] In this embodiment, the second mounting rod 3 is detachably and fixedly connected to the first mounting rod 2 via a first adjustable buckle 7. The height of the first adjustable buckle 7 on the first mounting rod 2 is adjustable, thereby adjusting the height of the second mounting rod 3 and the pressure head 41 to facilitate the installation of the electrode 9. The first adjustable buckle 7 can be detachably fixed using bolts and nuts, or other detachable fixing methods such as pins.

[0040] Specifically, the base 1 is horizontally positioned to provide a stable and reliable measurement surface. The surface of the base 1 that supports the electrode 9 is flat, preventing the electrode 9 from rubbing against the base 1 during the pulling process and avoiding excessive powder buildup caused by rubbing. The first mounting rod 2 is vertically positioned at one end of the base 1. Since the function of the first mounting rod 2 is to mount the second mounting rod 3 and the pressure rod 4, positioning the first mounting rod 2 at one end avoids it occupying the test position.

[0041] like Figure 1 As shown, the second mounting rod 3 is perpendicular to the first mounting rod 2. The projection of the end of the second mounting rod 3 away from the first mounting rod 2 onto the base 1 is close to the middle of the base 1, so that the pressure head 41 is set close to the middle of the base 1. The middle of the base 1 has a strong load-bearing capacity and is more stable, making it suitable as a test position.

[0042] In this embodiment, the pressure rod 4 is detachably fixed to the second mounting rod 3 via a second adjustable latch 8. The height of the top of the pressure rod 4 extending beyond the second adjustable latch 8 is adjustable, thereby allowing adjustment of the length of the spring 5 on the pressure rod 4 and selection of a suitable spring force. The second adjustable latch 8 is fixedly connected to the pressure rod 4 and abuts against the upper surface of one end of the second mounting rod 3. The pressure head 41 and the spring 5 combine to form an elastic pressure head 41 with fixed pressure. By adjusting the position of the second adjustable latch 8 on the pressure rod 4, the pressure of the pressure head 41 can be adjusted to ensure that the electrode 9 and the cleaning component 6 are in close contact during the measurement process. The second adjustable latch 8 can be detachably fixed using bolts and nuts, or other detachable fixing methods such as pins.

[0043] like Figure 1 As shown, the pressure rod 4 is perpendicular to the second mounting rod 3 and parallel to the first mounting rod 2, that is, the pressure rod 4 is set vertically so that the pressure head 41 presses the cleaning part 6 and the electrode 9 vertically downward, thereby achieving a better powder collection effect.

[0044] Specifically, such as Figure 3 As shown, the second mounting rod 3 has a through hole at the end away from the first mounting rod 2 for the pressure rod 4 to pass through. The second adjustable buckle 8 is fixedly connected to the pressure rod 4, and the second adjustable buckle 8 abuts against the through hole. When it is necessary to remove the pressure head 41 from the surface of the cleaning part 6, the second adjustable buckle 8 can be pulled upward.

[0045] In this embodiment, the first mounting rod 2, the second mounting rod 3, and the pressure rod 4 are all cylindrical. The diameter of the first mounting rod 2 is greater than the diameter of the second mounting rod 3 and the diameter of the pressure rod 4. The length of the first mounting rod 2 is greater than the length of the second mounting rod 3 and the length of the pressure rod 4, so that the first mounting rod 2 can provide a stable and reliable installation function.

[0046] Specifically, the pressure head 41 is cylindrical in shape, and its diameter is larger than that of the first mounting rod 2, the second mounting rod 3, and the pressure rod 4, so that the pressure head 41 can provide uniform and stable pressure.

[0047] In this embodiment, the pressure applied by the pressure head 41 to the cleaning member 6 and the electrode 9 is 15N~20N, which allows the cleaning member 6 to smoothly collect the floating powder on the electrode 9 during the pulling process of the electrode 9.

[0048] In a specific application scenario, when using the apparatus provided in this application for characterizing powder floating on the surface of electrode 9, the following steps can be taken:

[0049] 1. Adjust the position of the first adjustable buckle 7 on the first mounting rod 2, and adjust the second mounting rod 3 to the height at which the pressure head 41 can contact the base 1;

[0050] 2. Adjust the position of the second adjustable buckle 8 on the pressure rod 4. The second adjustable buckle 8 abuts against the second mounting rod 3 so that the pressure head 41 can be flatly attached to the base 1 (at this time, the pressure applied by the pressure head 41 to the base 1 is 15N~20N).

[0051] 3. Pull the second adjustable buckle 8 upwards to keep the pressure head 41 about 10cm away from the base 1 (at this time, the spring 5 is compressed).

[0052] 4. Place the electrode 9 to be tested flat on the base 1, and place the cleaning component 6 on the surface of the electrode 9.

[0053] 5. Slowly loosen the second adjustable buckle 8 so that the pressure head 41 presses smoothly onto the cleaning part 6;

[0054] 6. According to Figure 1 and Figure 2 The electrode 9 is pulled in the X direction as shown, and pulled at a constant speed for 50cm. (During the pulling process, the floating powder will not be blocked by the edge of the cleaning component 6. Almost all the floating powder is collected on the cleaning component 6. Because the edge of the cleaning component 6 is not under pressure, it will not affect the dust collection or the effect is very small and can be ignored. Also, 50cm is only a schematic length. The actual length can be pulled according to the actual situation. The length of pulling the electrode 9 can be adjusted according to the amount of dust on the electrode 9 of different models to represent the amount of dust on the corresponding length of the electrode 9.)

[0055] 7. Repeat step 3, remove the cleaning part 6, and the amount of dust collected on the cleaning part 6 is a characterization of the powder floating condition on the surface of the electrode 9.

[0056] To make the test structure more accurate, the amount of dust on the cleaning component 6 can be tested and compared multiple times to evaluate the powder floating condition of the electrode 9. In other embodiments, non-woven fabric can be used instead of the cleaning component 6. By using this device for characterizing the powder floating condition on the surface of the electrode 9 and operating according to the above steps, the powder floating condition on the surface of the electrode 9 can be collected, which facilitates the tracking of powder floating condition throughout the product trial production to mass production process and allows for timely product follow-up.

[0057] In another embodiment, the length of the electrode 9 can be not fixed, but a length measuring sensor can be added to the base 1. The length of the pulled electrode 9 can be measured while it is being pulled out, so that the measurement can be done on the spot.

[0058] It should be noted that in the description of this specification, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this specification, unless otherwise stated, "a plurality of" means two or more.

[0059] Any numerical values ​​cited herein include all values ​​ranging from a lower limit to an upper limit, increasing by one unit, with at least two units between any lower and any higher value. For example, if the quantity of a component or the value of a process variable (e.g., temperature, pressure, time, etc.) is described as being from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, the purpose is to illustrate that values ​​such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also explicitly listed in this specification. For values ​​less than 1, a unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1, etc. These are merely examples intended for explicit expression, and it can be assumed that all possible combinations of values ​​listed between the minimum and maximum values ​​are explicitly described in this specification in a similar manner.

[0060] Unless otherwise stated, all ranges include the endpoints and all numbers between them. The terms "approximately" or "about" used with ranges apply to both endpoints of the range. Thus, "approximately 20 to 30" is intended to cover "approximately 20 to approximately 30," including at least the specified endpoints.

[0061] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified elements, components, parts, or steps, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute included by “may” is optional.

[0062] Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The use of "a" or "an" to describe an element, component, part, or step does not imply the exclusion of other elements, components, parts, or steps.

[0063] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and applications beyond the provided examples will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this teaching should not be determined by reference to the above description, but rather by reference to the appended claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the inventors have not considered that subject matter as part of the disclosed utility model subject matter.

Claims

1. An apparatus for characterizing the surface dross of an electrode, comprising: The application relates to a cleaning device for electrode pieces, which comprises the following parts: a base for bearing the electrode pieces; a first mounting rod fixedly arranged on the base; a second mounting rod connected with the first mounting rod; a pressing rod connected with the second mounting rod, the bottom of the pressing rod being provided with a pressing head, and the pressing rod being provided with a spring outside the pressing rod, the spring abutting against the pressing head and the second mounting rod; a cleaning piece arranged between the pressing head and the base, the cleaning piece and the base being used for placing the electrode pieces, and the pressing head being used for pressing the cleaning piece against the surface of the electrode pieces; the friction force between the pressing head and the cleaning piece being greater than the friction force between the cleaning piece and the electrode pieces.

2. The device for characterizing the surface dross of a pole piece according to claim 1, characterized in that, The electrode pieces have a predetermined length, and the amount of dust collected by the cleaning piece is the amount of dust in the area of the electrode pieces pressed by the pressing head.

3. The device for characterizing the surface dross of a pole piece according to claim 1, characterized in that, The second mounting rod is detachably fixedly connected with the first mounting rod through a first adjustable buckle, and the height of the first adjustable buckle on the first mounting rod is adjustable.

4. The apparatus for characterizing pole piece surface dross of claim 1, wherein, The base is horizontally arranged, the first mounting rod is vertically arranged at one end of the base, the second mounting rod is perpendicular to the first mounting rod, and the projection of the end of the second mounting rod, which is far away from the first mounting rod, on the base is close to the middle part of the base.

5. The apparatus for characterizing pole piece surface dross of claim 1, wherein, The pressing rod is detachably fixedly connected with the second mounting rod through a second adjustable buckle, and the height of the top of the pressing rod, which extends out of the second adjustable buckle, is adjustable.

6. The device for characterizing the surface dross of a pole piece according to claim 5, characterized in that, The pressing rod is perpendicular to the second mounting rod and parallel to the first mounting rod.

7. The device for characterizing the surface dross of a pole piece according to claim 6, characterized in that, The end of the second mounting rod, which is far away from the first mounting rod, is provided with a through hole, the through hole is used for allowing the pressing rod to pass through, the second adjustable buckle is fixedly connected with the pressing rod and located above the through hole, and the second adjustable buckle abuts against the second mounting rod.

8. The apparatus for characterizing pole piece surface dross of claim 1, wherein, The first mounting rod, the second mounting rod and the pressing rod are all cylindrical, the diameter of the first mounting rod is greater than the diameters of the second mounting rod and the pressing rod, and the length of the first mounting rod is greater than the lengths of the second mounting rod and the pressing rod.

9. The device for characterizing the surface dross of a pole piece according to claim 8, characterized in that, The shape of the pressing head is cylindrical, the diameter of the pressing head is greater than the diameters of the first mounting rod, the second mounting rod and the pressing rod, and the material of the pressing head is rubber.

10. The device for characterizing the surface dross of a pole piece according to claim 9, characterized in that, The pressing force of the pressing head applied to the cleaning piece and the electrode pieces is 15N-20N, and the cleaning piece comprises dust-free paper or non-woven fabric.

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