Pole piece cutter and battery cell production equipment

Abstract

The utility model belongs to the technical field of battery production, and discloses a pole piece cutter and battery cell production equipment. The pole piece cutter comprises a cutter rest assembly, an upper cutter body and a lower cutter body, the cutter rest assembly comprises an upper cutter rest and a lower cutter rest, and the upper cutter rest is slidably connected to the lower cutter rest and can get close to or get away from the lower cutter rest in the first direction; the upper knife body is arranged on the upper knife rest, the lower knife body is fixedly arranged on the lower knife rest, the upper knife body is matched with the lower knife body, and an included angle between a knife edge of the upper knife body and a knife edge of the lower knife body is an acute angle; the upper knife body is clamped between the lower knife body and the upper knife rest, the upper knife rest is provided with a pre-tightening piece, and the pre-tightening piece can apply thrust to the upper knife body so that the upper knife body can abut against the lower knife body. According to the pole piece cutter, the service life of the cutter body can be prolonged, the maintenance frequency is reduced, the maintenance time is shortened, and therefore the production efficiency is improved, and material falling of pole pieces can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, and in particular to an electrode cutter and a cell production equipment. Background Technology

[0002] Since its commercialization, lithium batteries have become the preferred power source for modern mobile electronic devices due to their numerous advantages, such as high energy density, high operating voltage, no memory effect, long cycle life, and no environmental pollution. With the development of social productivity and the continuous progress of science and technology, it has become necessary to research and produce lithium batteries with longer life, better electrical performance, and better safety performance.

[0003] The electrode cutter is a critical component in the lithium battery electrode production process. Existing electrode cutters, in an effort to reduce cutting stroke, depth of cut, and wear, have a narrow and elongated cutter body, resulting in a short cutter lifespan. Furthermore, the traditional electrode cutter structure produces excessively large burrs at the cut point, leading to material loss at the edges. This results in lithium batteries that fail to meet actual production and testing requirements, severely impacting the battery's design capacity and cycle life.

[0004] Therefore, there is an urgent need to provide a new type of electrode cutter and cell production equipment to solve the above-mentioned technical problems in the existing technology. Utility Model Content

[0005] One objective of this invention is to provide an electrode cutter that can improve the service life of the cutter body, reduce maintenance frequency and time, thereby improving production efficiency and reducing electrode material loss.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The electrode cutter includes a blade holder assembly, an upper blade body, and a lower blade body. The blade holder assembly includes an upper blade holder and a lower blade holder. The upper blade holder is slidably connected to the lower blade holder and can move closer to or further away from the lower blade holder in a first direction. The upper blade body is disposed on the upper blade holder, and the lower blade body is fixedly disposed on the lower blade holder. The upper blade body and the lower blade body are adapted to each other, and the included angle between the cutting edges of the upper blade body and the cutting edges of the lower blade body is an acute angle. The upper blade body is sandwiched between the lower blade body and the upper blade holder. The upper blade holder is provided with a pre-tensioning member, which can apply a pushing force to the upper blade body so that the upper blade body abuts against the lower blade body.

[0008] Optionally, the cutting edge of the lower blade body is parallel to the second direction, the cutting edge of the upper blade body is set at an acute angle to the second direction, and the second direction is perpendicular to the first direction.

[0009] Optionally, the upper blade body includes an upper blade back and an upper blade edge, the upper blade edge is fixed to the upper blade back, the upper blade edge is adapted to the lower blade body, and the hardness of the upper blade edge is higher than the hardness of the upper blade back.

[0010] Optionally, the upper blade back is provided with a pin hole, and the upper blade holder is provided with a fixing hole that matches the pin hole, and a fixing pin passes through the pin hole and the fixing hole.

[0011] Optionally, either the lower tool post or the upper tool post is provided with a slide rail, and the other is provided with a slider that is slidably connected to the slide rail.

[0012] Optionally, the lower blade body is provided with guide portions extending along the first direction at both ends along the second direction, and the upper blade holder is slidably connected to the two guide portions at both ends along the second direction.

[0013] Optionally, the guide section is provided with an oil groove.

[0014] Optionally, the pre-tightening component is a pre-tightening bolt, and the upper tool holder is provided with the pre-tightening bolt, the end of which can abut against the upper tool body.

[0015] Optionally, the cutting edge angle of the aforementioned lower blade body is between 18° and 35°.

[0016] Another objective of this invention is to provide an electrode cell production equipment, which includes an electrode cutter as described in any of the above embodiments.

[0017] Beneficial effects:

[0018] In this invention, the blade holder assembly includes an upper blade holder and a lower blade holder that are slidably connected vertically. The upper blade holder is equipped with an upper blade body, and the lower blade holder is equipped with a lower blade body. The upper and lower blade bodies cooperate with each other, and the upper blade holder is equipped with a pre-tensioning member. The pre-tensioning member can apply a pushing force to the upper blade body, causing the upper blade body to abut against the lower blade body. As the upper blade body approaches the lower blade body, the electrode sheet is cut. Because the angle between the cutting edges of the upper and lower blade bodies is an acute angle, the service life of the electrode sheet cutter can be improved, and material loss at the cut edge of the electrode sheet can be avoided when cutting the electrode sheet. This electrode sheet cutter can improve the service life of the cutter body, reduce the frequency and time of maintenance, thereby improving production efficiency and reducing electrode sheet loss. Attached Figure Description

[0019] Figure 1 This is an isometric view of the electrode cutting tool provided in a specific embodiment of this utility model;

[0020] Figure 2This is an exploded view of the electrode cutter provided in a specific embodiment of this utility model.

[0021] In the picture:

[0022] 100. Tool holder assembly; 110. Upper tool holder; 111. Preload; 112. Pin hole; 113. Fixing pin; 114. Slider; 120. Lower tool holder; 121. Slide rail;

[0023] 210. Upper cutter body; 211. Upper cutter back; 212. Upper cutter edge; 213. Fixing hole; 220. Lower cutter body; 221. Guide part; 222. Lubricating oil groove. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0028] The first direction described in this embodiment is: Figure 1 and Figure 2 The X direction shown is the vertical direction; the second direction is... Figure 1 and Figure 2 The Y direction shown is the horizontal direction, and the X direction is perpendicular to the Y direction.

[0029] like Figure 1 and Figure 2 As shown, the electrode cutter includes a blade holder assembly 100, an upper blade body 210, and a lower blade body 220. The blade holder assembly 100 includes an upper blade holder 110 and a lower blade holder 120. The upper blade holder 110 is slidably connected to the lower blade holder 120 and can move closer to or further away from the lower blade holder 120 along a first direction. The upper blade body 210 is disposed on the upper blade holder 110, and the lower blade body 220 is fixedly disposed on the lower blade holder 120. The upper blade body 210 is adapted to the lower blade body 220, and the included angle between the cutting edge of the upper blade body 210 and the cutting edge of the lower blade body 220 is an acute angle. The upper blade body 210 is clamped between the lower blade body 220 and the upper blade holder 110. The upper blade holder 110 is provided with a pre-tensioning member 111, which can apply a pushing force to the upper blade body 210 so that the upper blade body 210 abuts against the lower blade body 220.

[0030] In this embodiment, the blade holder assembly 100 includes an upper blade holder 110 and a lower blade holder 120 that are slidably connected vertically. The upper blade holder 110 is provided with an upper blade body 210, and the lower blade holder 120 is provided with a lower blade body 220. The upper blade body 210 and the lower blade body 220 cooperate with each other, and the upper blade holder 110 is provided with a pre-tensioning member 111. The pre-tensioning member 111 can apply a pushing force to the upper blade body 210, causing the upper blade body 210 to abut against the lower blade body 220. As the upper blade body 210 approaches the lower blade body 220, the electrode sheet is cut. Since the angle between the cutting edge of the upper blade body 210 and the cutting edge of the lower blade body 220 is an acute angle, the service life of the electrode sheet cutter can be improved, and the loss of electrode sheet at the cut edge can be avoided when cutting the electrode sheet. This electrode sheet cutter can improve the service life of the cutter body, reduce the maintenance frequency and maintenance time, thereby improving production efficiency and reducing electrode sheet loss.

[0031] Furthermore, the cutting edge of the lower blade body 220 is parallel to the second direction, and the cutting edge of the upper blade body 210 is set at an acute angle to the second direction, which is perpendicular to the first direction. In this embodiment, since the upper blade body 210 approaches the lower blade body 220 along the first direction, the cutting edge of the upper blade body 210 is set at an acute angle to the second direction. That is, the size of the upper blade body 210 along the first direction gradually increases or decreases from left to right in the second direction, so that during the cutting process, the upper blade body 210 and the lower blade body 220 always only have one point of contact with the electrode, effectively reducing the adhesion between the electrode and the cutting edge and reducing electrode shedding.

[0032] In this embodiment, the upper blade body 210 includes an upper blade back 211 and an upper blade edge 212. The upper blade edge 212 is fixedly disposed on the upper blade back 211 and is adapted to the lower blade body 220. The hardness of the upper blade edge 212 is higher than that of the upper blade back 211. In this embodiment, the upper blade back 211 is made of alloy steel, and the upper blade edge 212 is made of tungsten steel. The upper blade back 211 and the upper blade edge 212 are fixedly connected. Thus, the upper blade body 210 only has the upper blade edge 212 made of higher-cost tungsten steel, which can reduce the manufacturing cost of the upper blade body 210 while ensuring its service life.

[0033] Please continue to refer to this. Figure 2 The upper blade back 211 is provided with a pin hole 112, and the upper blade holder 110 is provided with a fixing hole 213 that matches the pin hole 112. A fixing pin 113 passes through the pin hole 112 and the fixing hole 213. The upper blade body 210 and the upper blade holder 110 are connected by the fixing pin 113, so that the upper blade body 210 is fixedly connected to the upper blade holder 110, allowing the upper blade body 210 to maintain a suspended posture, and keeping the upper blade body 210 and the lower blade body 220 in a suspended state, which can further improve the service life of the upper blade body 210 and the lower blade body 220.

[0034] In this embodiment, either the lower blade holder 120 or the upper blade holder 110 is provided with a slide rail 121, and the other is provided with a slider 114 that is slidably connected to the slide rail 121. In this embodiment, the lower blade holder 120 is provided with slide rails 121 at both ends along the second direction, and the upper blade holder 110 is provided with sliders 114 at both ends along the second direction, thereby realizing the sliding connection between the upper blade holder 110 and the lower blade holder 120, guiding the movement of the upper blade holder 110, improving the stability of the movement, and improving the cutting quality of the electrode sheet.

[0035] Optionally, the lower blade body 220 is provided with guide portions 221 extending along the first direction at both ends along the second direction, and the upper blade holder 110 is slidably connected to the two guide portions 221 at both ends along the second direction. The guide portions 221 can guide the movement of the upper blade body 210, prevent the upper blade body 210 from tilting when subjected to the thrust of the preload member 111, ensure the stability of the fit between the upper blade body 210 and the lower blade body 220, further improve the cutting quality of the electrode sheet, and prevent material loss.

[0036] Furthermore, the guide portion 221 is provided with an oil groove 222. The oil groove 222 is used to fill with lubricating oil, thereby achieving lubrication between the upper cutter body 210 and the lower cutter body 220, ensuring the smooth and stable movement of the upper cutter body 210. In this embodiment, the oil groove 222 is S-shaped, which can increase the lubrication area and improve the lubrication performance.

[0037] Specifically, the pre-tightening component 111 is a pre-tightening bolt, and the upper tool holder 110 is provided with the pre-tightening bolt. The end of the pre-tightening bolt can abut against the upper tool body 210. The pre-tightening bolt is threadedly connected to the upper tool holder 110. By tightening or loosening the pre-tightening bolt, the pre-tightening force between the upper tool body 210 and the lower tool body 220 can be changed.

[0038] In this embodiment, three pre-tightening bolts are evenly spaced along the second direction to ensure that the pre-tightening force is evenly applied to the upper cutter body 210, which will not be described in detail here.

[0039] Optionally, the cutting edge angle of the lower blade body 220 is between 18° and 35°. Since the cutting edge angle of the lower blade body is an acute angle, specifically between 18° and 35°, the sharpness of the cutting edge of the lower blade body 220 can be guaranteed, preventing material loss when the electrode sheet is cut, and further improving the cutting quality of the electrode sheet.

[0040] It should be noted that the cutting edge and guide part 221 of the lower cutter body 220 are both made of high-hardness tungsten steel, while other parts of the lower cutter body 220 are made of alloy steel. This reduces the manufacturing cost of the lower cutter body 220 while ensuring its service life, which will not be elaborated here.

[0041] In this embodiment, the lifespan of the electrode cutter has been increased from the original average lifespan of 300,000-400,000 cycles to the current lifespan of 4 million cycles. Based on production capacity calculations, 6-8 sets of electrode cutters were originally needed annually, with each set costing 20,000 yuan. However, only 2 sets of electrode cutters are needed in this embodiment, which is expected to save 20,000-120,000 yuan annually. At the same time, the current downtime for replacing electrode cutters is 6 hours / month, while the downtime for replacing electrode cutters in this embodiment is shortened to 4 hours / 3 months, which can reduce maintenance time by about 48 hours. This can significantly improve the cutting efficiency of electrode sheets, thereby improving the production efficiency of battery cells.

[0042] Another objective of this invention is to provide a battery cell production apparatus, which includes an electrode cutter as described in any of the above embodiments. The apparatus also includes an electrode conveying mechanism and a stacking mechanism. Using the aforementioned electrode cutter increases the service life of the cutter body, reduces maintenance frequency and time, thereby improving production efficiency and reducing electrode waste, thus enhancing the quality of the produced battery cells. Therefore, the battery cell production apparatus provided in this embodiment can produce higher-quality battery cells with greater efficiency.

[0043] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An electrode cutting blade, characterized in that, include: Tool holder assembly (100), the tool holder assembly (100) includes an upper tool holder (110) and a lower tool holder (120), the upper tool holder (110) is slidably connected to the lower tool holder (120), and the upper tool holder (110) is capable of approaching or moving away from the lower tool holder (120) in a first direction; The upper blade body (210) and the lower blade body (220) are provided. The upper blade body (210) is disposed on the upper blade holder (110), and the lower blade body (220) is fixed on the lower blade holder (120). The upper blade body (210) and the lower blade body (220) are adapted to each other. The included angle between the cutting edge of the upper blade body (210) and the cutting edge of the lower blade body (220) is an acute angle. The upper blade body (210) is sandwiched between the lower blade body (220) and the upper blade holder (110). The upper blade holder (110) is provided with a pre-tensioning member (111). The pre-tensioning member (111) can apply a pushing force to the upper blade body (210) so that the upper blade body (210) abuts against the lower blade body (220).

2. The electrode cutter according to claim 1, characterized in that, The cutting edge of the lower blade body (220) is parallel to the second direction, and the cutting edge of the upper blade body (210) is set at an acute angle to the second direction, with the second direction being perpendicular to the first direction.

3. The electrode cutter according to claim 2, characterized in that, The upper blade body (210) includes an upper blade back (211) and an upper blade edge (212). The upper blade edge (212) is fixed to the upper blade back (211). The upper blade edge (212) is adapted to the lower blade body (220). The hardness of the upper blade edge (212) is higher than that of the upper blade back (211).

4. The electrode cutter according to claim 3, characterized in that, The upper blade back (211) is provided with a pin hole (112), and the upper blade holder (110) is provided with a fixing hole (213) that matches the pin hole (112). A fixing pin (113) is inserted into the pin hole (112) and the fixing hole (213).

5. The electrode cutter according to claim 3, characterized in that, The lower tool holder (120) and the upper tool holder (110) are each provided with a slide rail (121), and the other is provided with a slider (114) that is slidably connected to the slide rail (121).

6. The electrode cutter according to claim 3, characterized in that, The lower blade body (220) is provided with guide portions (221) extending along the first direction at both ends along the second direction, and the upper blade holder (110) is slidably connected to the two guide portions (221) at both ends along the second direction.

7. The electrode cutter according to claim 6, characterized in that, The guide section (221) is provided with an oil groove (222).

8. The electrode cutter according to any one of claims 1-7, characterized in that, The pre-tightening component (111) is a pre-tightening bolt. The upper tool holder (110) is provided with the pre-tightening bolt, and the end of the pre-tightening bolt can abut against the upper tool body (210).

9. The electrode cutter according to any one of claims 1-7, characterized in that, The cutting edge angle of the lower blade body (220) is between 18° and 35°.

10. Battery cell production equipment, characterized in that, Includes the electrode cutter as described in any one of claims 1-9.

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