Quantitative powder scraper for pole piece

Abstract

The utility model discloses a pole piece quantitative powder scraper which comprises a powder scraping mechanism, a pole piece fixing device and a base which are sequentially arranged from top to bottom, the powder scraping mechanism comprises a shell internally provided with a scraper mechanism, and the scraper mechanism can move in the shell in the length direction of the shell. The scraper mechanism comprises a vertically arranged scraper, the scraper is mounted on a pull rod mechanism capable of horizontally reciprocating, a handle is arranged at the operation end of the pull rod mechanism, and the handle is arranged on the outer side of one end of the powder scraping mechanism. According to the quantitative powder scraper for the pole piece, powder splashing can be avoided in the powder scraping process of the pole piece, and meanwhile, the quantitative powder scraper is convenient to disassemble and clean.

Description

Technical Field

[0001] The utility model relates to the technical field of battery processing, in particular to a pole piece quantitative powder scraper. Background Art

[0002] In the era of electric vehicle industry, rapid development of Internet and artificial intelligence, lithium-ion batteries play an extremely important role in human production and life. The general process of lithium-ion battery manufacturing process is: active materials, binders and conductive agents are mixed to prepare slurry, and then coated on both sides of copper or aluminum current collectors, and dried to form dry pole pieces, which are compacted and then cut or stripped; then, positive and negative pole pieces and diaphragms are assembled into battery cells, and electrolytes are injected after packaging, and finally formed into battery products after charge and discharge activation. Binders are important components of positive and negative electrodes of lithium-ion batteries. Their main function is to increase the strength of the structure, make the electrode plates adhere more closely to the electrode sheets, improve the compression performance and shock resistance of the electrodes, and prevent the electrode plates from falling off or deforming; increase the contact area between the main active materials and the conductive agent to make the battery more conductive; effectively reduce the gap and interval between the battery plates and the main active materials of the battery, improve the chemical inertia of the battery, and extend the service life of the battery. During the drying process of the electrode, a small temperature gradient will be formed between the surface and the internal temperature of the electrode. The surface temperature will be higher than the internal temperature, causing the electrode surface to dry first and the material concentration to be higher than the internal concentration. Under such a driving force, the binder in the electrode will gradually migrate to the surface as the solvent evaporates, and precipitate on the surface of the active material and the conductive agent. In mild cases, there is no obvious problem on the surface of the electrode, but the life of the lithium-ion battery will be shortened during use; in severe cases, the peel strength of the electrode will be low.

[0003] In order to examine whether there is floating phenomenon of the electrode adhesive, the upper, middle and lower layers of powder in the electrode material area are peeled off, and the upper and lower layers of powder are collected; the upper and lower layers of powder are dried; and the adhesive content in the upper and lower layers of powder is measured by thermogravimetric analyzer. At present, the electrode powder scraping equipment is mainly used in production processes, one of which is to scrape the electrode to leave blanks and leave the electrode ear welding position; or in the production process of lithium batteries, the rolled electrode is scraped to remove surface burrs and protrusions and regularize the surface of the electrode. To examine the physical properties of the powder on the dried electrode, the powder is mainly scraped directly by a blade. The scraping speed is slow and the scraping force is uneven, which makes it impossible to distinguish the upper and lower layers of powder at a fixed distance and quantity.

[0004] CN 220233234 U proposes a pole piece powder scraping device for a solid-state lithium-ion battery production process, comprising a base, a fixed plate fixedly installed on the top surface of the base, two second limit rods fixedly installed on the top surface of the fixed plate, an adjustment plate movably installed on the top surface of the fixed plate, two motors fixedly installed on the rear side of the adjustment plate, a connecting block fixedly installed on the front side of the adjustment plate, and a baffle fixedly installed on one end of the connecting block. The utility model relates to the technical field of solid-state lithium battery pole piece powder scraping. The pole piece powder scraping device for a solid-state lithium-ion battery production process can play a clamping role on the battery pole piece through the arranged clamping plate. When in use, the battery pole piece is placed on the top surface of the placing plate, and then the adjusting handle is rotated to make the push plate push the clamping plate to clamp the pole piece to avoid shaking when scraping the powder. After scraping the powder, the movable plate can be pulled out through the slider, and then the adjusting handle is rotated so that the battery pole piece will fall down, which is convenient to take out and has good practicality. This pole piece powder scraping device can only fix multiple pole pieces for scraping powder, but cannot scrape powder at a fixed distance or quantity for the pole pieces, and the scraped powder cannot be collected well; and two motors are fixedly installed on the rear side of the adjustment plate of the device, which is not convenient for disassembly and cleaning; there is no corresponding pole piece cutting device.

[0005] CN 210897472 U proposes a pole piece scraping device for lithium ion battery production process, comprising a base, a U-shaped plate is installed on the surface of the base, through grooves are symmetrically arranged on the surface of the U-shaped plate, pole pieces are connected inside the through grooves, an opening groove is arranged on the inner wall of the through groove, a support plate is installed inside the opening groove, circular holes are symmetrically arranged on the surface of the support plate, an electromagnet is installed on the surface of the support plate, a metal baffle is installed inside the opening groove, through the magnetic adsorption effect of the electromagnet and the metal baffle, an extrusion rod presses and fixes the pole piece through friction extrusion blocks, and the connecting plate can drive a scraper to move to scrape the pole piece through the effect of the thread on the surface of the rotating shaft and the sliding groove, and the scraper can move inside the installation groove to adjust the distance between the pole piece and the scraper, and the screw rod and the screw hole The inner thread keeps the tightened state. The device achieves fixed-distance powder scraping of the pole piece, but there is no pole powder collection device; the device uses the electromagnet to generate magnetic force at the moment of powering on, and magnetically adsorbs the metal baffle so that the extrusion rod presses and fixes the pole piece through friction with the extrusion block. The device is cumbersome and not easy to disassemble and clean; there is no corresponding pole piece cutting device. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings and defects of the prior art and to provide an integrated, visual and detachable new type of pole piece quantitative powder scraper.

[0007] A pole piece quantitative scraper comprises a powder scraping mechanism, a pole piece fixing device and a base which are arranged in sequence from top to bottom, the powder scraping mechanism comprises a shell with a scraper mechanism arranged inside, the scraper mechanism can move in the shell along the length direction of the shell, the scraper mechanism comprises a vertically arranged scraper, the scraper is installed on a pull rod mechanism which can move horizontally back and forth, the operating end of the pull rod mechanism is arranged with a handle, the handle is on the outside of one end of the powder scraping mechanism.

[0008] Among them, the top end of the scraper is connected to a scraper adjustment mechanism for adjusting the distance between the scraper and the electrode to be processed. The scraper adjustment mechanism includes a cylinder vertically arranged at the top of the end rod of the pull rod mechanism, a spring is sleeved on the cylinder, and the top end of the cylinder is threadedly connected to an adjustment knob.

[0009] Wherein, a guide groove for movement of the pull rod mechanism is formed on the relative inner side wall surface of the sliding cavity of the scraper mechanism of the shell, and a pulley cooperating with the guide groove is arranged on the pull rod mechanism.

[0010] Among them, a cover plate is embedded in the cover plate embedding groove on the upper end face of the scraper mechanism sliding cavity, and the surface of the cover plate has a long slot hole running from the top surface of the cover plate to the bottom surface. The long slot hole is arranged along the length direction of the cover plate and is used to avoid the scraper adjustment mechanism when the scraper mechanism moves.

[0011] Among them, there is an observation hole on the cover plate, a transparent plate is arranged in the observation hole, and the observation hole is arranged away from the scraper; the observation hole corresponds to the powder observation hole below it, and the powder observation hole is arranged vertically and located on the outer edge of the sliding cavity of the scraper mechanism of the shell.

[0012] Among them, the pole piece fixing device includes a fixing device shell with a rectangular groove formed on the top surface, and a pole piece fixing mechanism is arranged in the rectangular groove. The pole piece fixing mechanism includes a rectangular frame-shaped upper magnetic suction frame, a lower magnetic suction plate and an isolation membrane. The isolation membrane is arranged on the lower magnetic suction plate and pressed by the upper magnetic suction frame. The upper surface of the isolation membrane is used to place the pole piece to be processed, and the lower magnetic suction plate is fixed to the bottom surface of the rectangular groove.

[0013] Among them, a pole powder collecting groove is arranged at one end of the pole piece fixing mechanism, and the pole powder collecting groove is open at one end close to the pole piece to be processed, so as to allow the pole powder scraped from the pole piece to enter. The pole powder collecting groove is arranged on the upper surface of the isolation membrane and is limited by the upper magnetic suction frame.

[0014] Among them, the top surface of the base forms a shearing tool accommodating cavity, and the shearing tool accommodating cavity is provided with a first tool and a second tool for shearing the pole piece, and the first tool and the second tool are respectively used for shearing the pole piece in the length direction and the width direction.

[0015] There are two first cutters and two second cutters respectively, and the outer bottom surface of the bottom plate of the shear cutter accommodating cavity has a cutter installation groove for embedding and installing the first cutter and the second cutter.

[0016] Among them, a vertically arranged limit column is arranged on the top end surface of the outer convex edge of the shear tool accommodating cavity of the base, and a limit hole for connection and cooperation is provided at the corresponding position of the fixing device shell of the pole piece fixing device; the surface of the shell of the scraper mechanism has an installation limit hole, and the pole piece fixing device has a corresponding vertically arranged installation limit column, and the installation limit column cooperates with the installation limit hole.

[0017] The pole piece quantitative powder scraper of the utility model can not only avoid powder splashing during the powder scraping process of the pole piece, but also facilitate disassembly and cleaning; the pole piece quantitative powder scraper of the utility model can lock the distance between the scraped powder and the upper end of the pole piece to improve the accuracy of the experiment; the pole piece quantitative powder scraper of the utility model is arranged with an observation hole to observe the state and dosage of the scraped powder; it is equipped with a pole piece cutting blade and a corresponding cutting blade mounting groove to realize cutting of a fixed pole piece shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic axonometric diagram of the overall appearance of the pole piece quantitative scraper of the utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the pole piece quantitative scraper of the utility model without the cover plate.

[0020] Figure 3 It is a schematic diagram of the housing and cover plate of the pole piece quantitative scraper of the utility model without the scraping mechanism.

[0021] Figure 4 It is an overall schematic diagram of the powder scraping mechanism of the pole piece quantitative powder scraper of the utility model.

[0022] Figure 5 It is a schematic diagram of the cover plate of the powder scraping mechanism of the pole piece quantitative scraper of the utility model.

[0023] Figure 6 It is a schematic diagram of the scraper mechanism of the powder scraping mechanism of the pole piece quantitative scraper of the utility model.

[0024] Figure 7 It is a schematic diagram of the shell of the powder scraping mechanism of the pole piece quantitative scraper of the utility model.

[0025] Figure 8 It is a schematic diagram of the pole piece fixing device of the pole piece quantitative scraper of the utility model.

[0026] Fig. 9The utility model is a schematic diagram of the pole piece fixing mechanism of the pole piece fixing device of the pole piece quantitative scraper.

[0027] Fig.10 It is a schematic diagram of the shell of the pole piece fixing device of the pole piece quantitative scraper of the utility model.

[0028] Fig.11 It is a schematic diagram of the pole powder collecting trough of the pole piece fixing device of the pole piece quantitative powder scraper of the utility model.

[0029] Fig.12 It is a schematic diagram of the base of the pole piece quantitative scraper of the utility model.

[0030] Fig.13 This is a schematic diagram of the outer bottom of the base of the pole piece quantitative scraper of the utility model after being exposed.

[0031] Fig.14 This is a schematic diagram of the utility model after the cutter is installed on the outer bottom of the base of the pole piece quantitative scraper.

[0032] Fig.15 This is a schematic diagram of the second cutter installed on the outer bottom of the base of the pole piece quantitative scraper of the utility model.

[0033] Fig.16 This is a schematic diagram of the first cutter installed on the outer bottom of the base of the pole piece quantitative scraper of the utility model. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] like Figures 1 to 16 As shown, the pole piece quantitative scraper of the embodiment of the utility model comprises a scraper mechanism 10, a pole piece fixing device 20 and a base 30 which are arranged in sequence from top to bottom, the scraper mechanism comprises a hollow shell 11 in which a scraper mechanism 13 is arranged, the scraper mechanism 13 can move in the shell along the length direction of the shell, the scraper mechanism 13 comprises a vertically arranged scraper 132, the scraper is mounted on a pull rod mechanism 131 which can move horizontally back and forth, the operating end of the pull rod mechanism is arranged with a handle 135, the handle 135 is on the outside of one end of the scraper mechanism 10, and the end face side of the shell 11 of the scraper mechanism is provided with a hole 116 for guiding the pull rod of the pull rod mechanism 131 to extend and move.

[0036] In some embodiments, the top end of the scraper 132 is connected to a scraper adjustment mechanism for adjusting the distance between the scraper 132 and the electrode 40 to be processed. The scraper adjustment mechanism includes a cylinder 133 vertically arranged at the top of the end rod of the pull rod mechanism. The cylinder is sleeved with a spring (not shown in the figure). The top end of the cylinder is threadedly connected to an adjustment knob 134. By rotating the adjustment knob, the distance between the scraper and the electrode 40 can be controlled. The spring is used to adjust the squeezing force of the scraper to adjust the distance between the scraper 132 and the electrode 40. In some embodiments, a magnifying glass 115 is embedded at one end of the shell 11 of the powder scraping mechanism 10 for observing the distance between the scraper 132 and the electrode 40. The surface of the scraper may have a scale to facilitate observation of the distance adjustment. Quantitative powder scraping can be achieved by cooperating with the adjustment mechanism and the scale on the scraper. One end of the shell, such as Figure 1 The left end is hollowed out to form an observation channel (not shown), which leads directly to the inside of the hollow cavity of the shell, and the magnifying glass 115 is arranged in the observation channel.

[0037] In some embodiments, the housing 11 has a scraper mechanism sliding cavity 111, preferably a rectangular cavity, and the relative inner wall surface of the scraper mechanism sliding cavity 111 is formed with a guide groove 112 for the movement of the pull rod mechanism, and the pull rod mechanism 131 is provided with pulleys 136 cooperating with the guide groove on both sides of one end close to the scraper, and the pulley cooperates with the guide groove to facilitate the pull rod mechanism to drive the scraper to move, so as to scrape the pole powder on the surface of the pole piece 40. The pull rod mechanism 131 is preferably a U-shaped structure, and its open side is connected to the handle 15, and the handle is a U-shaped structure.

[0038] In some embodiments, a cover plate 12 is embedded in the cover plate embedding groove 117 on the upper end surface of the scraper mechanism sliding cavity 111, and a long slot hole 121 is provided on the surface of the cover plate 12, which runs from the top surface of the cover plate to the bottom surface. The long slot hole 121 is arranged along the length direction of the cover plate 12, and is used to avoid the adjustment knob and other mechanisms of the scraper adjustment mechanism when the scraper mechanism moves. By providing the cover plate 12, powder splashing when the pole piece is scraping powder can be avoided.

[0039] In some embodiments, the surface of the shell 11, specifically, the surface of the outer edge of the cover plate embedded groove at the upper end of the scraper mechanism sliding cavity, has an installation limit hole 114, preferably, at least two, and the pole piece fixing device 20 has a corresponding installation limit column 22, and the installation limit column 22 cooperates with the installation limit hole 114, so that the pole piece fixing device 20 and the powder scraping mechanism 10 can be placed one above the other and installed together.

[0040] In some embodiments, the cover plate 12 has an observation hole 122, in which a transparent plate is disposed, and the observation hole is arranged away from the scraper 132; the observation hole corresponds to the powder observation hole 113 therebelow, and the powder observation hole 113 is arranged vertically and is located on the outer edge of the sliding cavity of the scraper mechanism of the shell 12. Through the cooperation of the powder observation hole and the observation hole 122, visual observation of the scraping powder can be achieved, and the state and dosage of the scraped powder can be observed.

[0041] In some embodiments, the pole piece fixing device 20 includes a fixing device shell 21 having a rectangular groove 26 formed on the top surface, and a pole piece fixing mechanism 23 is disposed in the rectangular groove. The pole piece fixing mechanism includes a rectangular frame-shaped upper magnetic suction frame 231, a lower magnetic suction plate 232 and an isolation membrane 233. The isolation membrane is arranged on the lower magnetic suction plate and pressed by the upper magnetic suction frame. The upper surface of the isolation membrane is used to place the pole piece 40 to be processed, and the lower magnetic suction plate is fixed to the bottom surface of the rectangular groove. The isolation membrane has high hardness and large friction, so that the pole piece does not move during the powder scraping process.

[0042] In some embodiments, a powder collecting trough 24 is arranged at one end of the pole piece fixing mechanism 23, and the powder collecting trough is open at one end of the pole piece to be processed, so that the powder scraped from the pole piece can enter, wherein preferably, the powder collecting trough is arranged on the upper surface of the isolation membrane and is limited by the upper magnetic bracket. When scraping powder, pulling the handle 135 can drive the scraper structure 13 to move as a whole, and the purpose of scraping the powder on the surface of the pole piece 40 is achieved by the scraper, and the powder is collected in the powder collecting trough 24.

[0043] In some embodiments, the top surface of the base 30 forms a shearing tool accommodating cavity, in which a first tool 50 and a second tool 51 for shearing the pole piece are placed. The first tool and the second tool are respectively used for shearing the pole piece to be scraped off in the length direction and the width direction.

[0044] In some embodiments, there are two of each of the first tool and the second tool, and the outer bottom surface of the bottom plate of the shear tool accommodating cavity has a tool installation groove for embedding and installing the first tool and the second tool, such as the first tool installation groove 34 and the second tool installation groove 33.

[0045] In some embodiments, at least two limiting posts 32 are arranged on the top end surface of the outer convex edge of the shear tool accommodating cavity of the base, and the limiting posts are arranged vertically. The corresponding positions of the fixing device shell 21 of the pole piece fixing device 20 are provided with limiting holes 25 for connection and cooperation. By cooperating with the limiting holes and the limiting posts, the base and the pole piece fixing device can be superimposed and assembled together to complete the inlay.

[0046] From the above description, it can be seen that the pole piece quantitative scraper of the utility model is an integrated structure, which is easy to disassemble and clean; the pole piece quantitative scraper of the utility model can adjust and lock the distance between the scraped powder and the upper end of the pole piece, and cooperate with the scale on the scraper to achieve quantitative scraping of powder. The pole piece quantitative scraper of the utility model can observe the state and dosage of the scraped powder in real time through the transparent observation hole. The pole piece quantitative scraper of the utility model can realize the cutting of fixed pole piece shape through the use of the cutter on the base.

[0047] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model.

[0048] Therefore, no matter from which point of view, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0049] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Pole piece quantitative scraper, characterized in that: It includes a powder scraping mechanism, a pole piece fixing device and a base which are arranged in sequence from top to bottom. The powder scraping mechanism includes a shell with a scraper mechanism arranged inside. The scraper mechanism can move in the shell along the length direction of the shell. The scraper mechanism includes a vertically arranged scraper. The scraper is installed on a pull rod mechanism which can move horizontally back and forth. The operating end of the pull rod mechanism is arranged with a handle, and the handle is on the outside of one end of the powder scraping mechanism.

2. The pole piece quantitative powder scraper according to claim 1, characterized in that: The top end of the scraper is connected to a scraper adjustment mechanism for adjusting the distance between the scraper and the electrode to be processed. The scraper adjustment mechanism includes a cylinder vertically arranged at the top of the end rod of the pull rod mechanism, a spring is sleeved on the cylinder, and the top end of the cylinder is threadedly connected to an adjustment knob.

3. The pole piece quantitative powder scraper according to claim 2, characterized in that: A guide groove for movement of the pull rod mechanism is formed on the relative inner side wall surface of the scraper mechanism sliding cavity of the shell, and a pulley matched with the guide groove is arranged on the pull rod mechanism.

4. The pole piece quantitative powder scraper according to claim 3, characterized in that: A cover plate is embedded in the cover plate embedding groove on the upper end surface of the scraper mechanism sliding cavity. The surface of the cover plate has a long slot hole extending from the top surface of the cover plate to the bottom surface. The long slot hole is arranged along the length direction of the cover plate and is used to avoid the scraper adjustment mechanism when the scraper mechanism moves.

5. The pole piece quantitative powder scraper according to claim 4, characterized in that: The cover plate has an observation hole, in which a transparent plate is disposed, and the observation hole is arranged away from the scraper; the observation hole corresponds to the powder observation hole below it, and the powder observation hole is arranged vertically and located on the outer edge of the sliding cavity of the scraper mechanism of the shell.

6. The pole piece quantitative powder scraper according to claim 1, characterized in that: The pole piece fixing device includes a fixing device shell with a rectangular groove formed on the top surface, a pole piece fixing mechanism is arranged in the rectangular groove, and the pole piece fixing mechanism includes a rectangular frame-shaped upper magnetic suction frame, a lower magnetic suction plate and an isolation membrane. The isolation membrane is arranged on the lower magnetic suction plate and pressed by the upper magnetic suction frame. The upper surface of the isolation membrane is used for placing the pole piece to be processed, and the lower magnetic suction plate is fixed to the bottom surface of the rectangular groove.

7. The pole piece quantitative powder scraper according to claim 6, characterized in that: A pole powder collecting groove is arranged at one end of the pole piece fixing mechanism, and the pole powder collecting groove is open at one end of the pole piece to be processed, so that the pole powder scraped from the pole piece can enter. The pole powder collecting groove is arranged on the upper surface of the isolation membrane and is limited by the upper magnetic suction frame.

8. The pole piece quantitative powder scraper according to claim 1, characterized in that: A shearing tool accommodating cavity is formed on the top surface of the base, and a first tool and a second tool for shearing the pole piece are placed in the shearing tool accommodating cavity. The first tool and the second tool are respectively used for shearing the pole piece in the length direction and the width direction.

9. The pole piece quantitative powder scraper according to claim 8, characterized in that: There are two of each of the first tool and the second tool, and the outer bottom surface of the bottom plate of the shear tool accommodating cavity has a tool installation groove for embedding and installing the first tool and the second tool.

10. The pole piece quantitative powder scraper according to claim 8, characterized in that: A vertically arranged limit column is arranged on the top end surface of the outer convex edge of the shear tool accommodating cavity of the base, and a limit hole for connection and cooperation is provided at the corresponding position of the fixing device shell of the pole piece fixing device; the surface of the shell of the scraper mechanism has an installation limit hole, and the pole piece fixing device has a corresponding vertically arranged installation limit column, and the installation limit column cooperates with the installation limit hole.

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