Cutting device for battery pole piece

Abstract

The utility model relates to the technical field of lithium ion batteries, and particularly provides a cutting device for a battery pole piece. The problems that a cutting mechanism is complex in structure, and the cutting precision needs to be further improved are solved. Therefore, the utility model provides a cutting device, which comprises a pole piece clamping assembly, a cutting assembly and a cutting assembly, wherein the pole piece clamping assembly is used for clamping a battery pole piece; the pole piece moving assembly comprises a sliding piece and a fixing piece fixed to the sliding piece, the sliding piece can move in the first direction, and the fixing piece is used for fixing the battery pole piece clamped on the pole piece clamping assembly; the cutter assembly is arranged above the pole piece moving assembly, the cutter assembly comprises a height-adjustable cutter, the cutter can move in the second direction to cut the battery pole piece, and the first direction is perpendicular to the second direction. The shape and depth of the defect in the battery pole piece can be controlled, the cutting precision can be improved, the structure of the cutting device is simple, and the manufacturing cost of the cutting device can be reduced.

Description

Technical Field

[0001] This application relates to the field of lithium-ion battery technology, and more specifically to a cutting device for battery electrodes. Background Technology

[0002] Currently, lithium-ion battery technology has made significant progress, with continuously improving energy density and greatly extended cycle life. However, at the same time, battery safety issues have become increasingly prominent, becoming one of the key factors restricting the large-scale application of batteries. In order to conduct in-depth research on battery safety, it is necessary to perform certain cutting processes on the battery electrodes to cause the battery to fail through defined defects (such as rectangular or circular defects), thereby verifying the battery's failure mechanism.

[0003] Related technology provides a battery electrode cutting mechanism, including: a mounting plate; a cross roller guide rail mounted on the mounting plate; a guide rail slide plate mounted on the cross roller guide rail and capable of sliding up and down along the guide rail, with bearing seats fixed on both sides of the guide rail slide plate; a rotating shaft with its two ends inserted into the bearing seats respectively; a cutter mounting plate connected to the rotating shaft and capable of rotating around the rotating shaft; an upper cutter mounted on the cutter mounting plate; a lower cutter mounted on the mounting plate, the lower cutter located below the upper cutter; and an adjusting rod, one end of which is fixed to the guide rail slide plate, and the other end is provided with a locking nut. A spring is sleeved on the adjusting rod, and by adjusting the locking nut, the spring can push the cutter mounting plate to rotate around the rotating shaft, so that the upper cutter and the lower cutter are in close contact. However, the cutting mechanism in the related technology has a relatively complex structure, and the cutting accuracy needs to be further improved.

[0004] Accordingly, a new technical solution is needed in this field to solve the above problems. Utility Model Content

[0005] In order to solve at least one of the above-mentioned problems in the prior art, namely, the problem that the cutting mechanism has a relatively complex structure and the cutting accuracy needs to be further improved.

[0006] In a first aspect, this application provides a cutting device for battery electrodes, the cutting device comprising: an electrode clamping assembly for clamping the battery electrode; an electrode moving assembly including a slider and a fixing member fixed to the slider, the slider being movable along a first direction, the fixing member being used to fix the battery electrode clamped on the electrode clamping assembly; and a cutting assembly including a height-adjustable cutting blade, the cutting blade being movable along a second direction to cut the battery electrode, wherein the first direction is perpendicular to the second direction.

[0007] In some embodiments, the fixing member includes a connecting plate and a pressure plate; wherein the connecting plate is fixed to the sliding member, the pressure plate is detachably connected to the connecting plate, and the pressure plate and the connecting plate are used to cooperate in fixing and clamping the battery electrode on the electrode clamping assembly when the cutting device is in use.

[0008] In some embodiments, the sliding member includes two parallel slide rails and two slide rods that cooperate with the slide rails, wherein the two ends of the connecting plate are respectively fixedly connected to the two slide rods, and the slide rods protrude to the side away from the connecting plate.

[0009] In some embodiments, the two ends of the connecting plate and the pressure plate extend to the outside of the electrode clamping assembly. The two ends of the connecting plate are provided with a first fixing hole, and the two ends of the pressure plate are provided with a second fixing hole. The first fixing hole and the second fixing hole are detachably connected by screws.

[0010] In some embodiments, the slide bar is provided with a scale, the first end of the slide bar extends to the outside of the slide rail, and the first end of the slide bar is provided with a movable limiting block.

[0011] In some embodiments, the electrode clamping assembly includes two clamps disposed opposite to each other for clamping the two opposite electrode ends of the battery electrode.

[0012] In some embodiments, along the first direction, the length of the fixing clip is greater than or equal to the length of the battery electrode.

[0013] In some embodiments, the fixing clamp includes a fixing groove and groove walls located on both sides of the fixing groove, the electrode end is adapted to be inserted into the fixing groove, and the groove walls are capable of clamping the battery electrode under the action of the fixing member.

[0014] In some embodiments, the cutting device further includes a tool holder extending along the second direction, and the cutting blade assembly is movably disposed on the tool holder.

[0015] In some embodiments, the cutter includes a circular cutter or a rectangular cutter; wherein the cutter assembly includes: a cutter body; a rotary knob disposed on the cutter body and capable of being driven to rotate to drive the cutter to rotate; and a telescopic knob disposed on the cutter body and capable of being driven to rotate to drive the cutter to move in a vertical direction.

[0016] Under the premise of adopting the above technical solution, the electrode clamping assembly can initially clamp the battery electrode, keeping it flat. The fixing part of the electrode moving assembly can fix the electrode clamping assembly, thereby fixing the battery electrode. At the same time, moving the cutter along the second direction can position the cutter at the desired cutting position. By adjusting the height of the cutter, the cutting depth can be adjusted. Then, pulling the sliding part of the electrode moving assembly can move the battery electrode along the first direction, cutting out the defect of the desired shape. The cutting device provided in this application can control the shape and depth of the defect in the battery electrode, which is beneficial to improving cutting accuracy. Moreover, the structure of the cutting device is relatively simple, which is beneficial to reducing the manufacturing cost of the cutting device. Attached Figure Description

[0017] The preferred embodiments of this application are described below with reference to the accompanying drawings, in which:

[0018] Figure 1 This is a schematic diagram of the cutting device in this application;

[0019] Figure 2 yes Figure 1 A schematic diagram of the connection between the middle connecting plate and the slide rod;

[0020] Figure 3 yes Figure 2 A structural diagram from another angle;

[0021] Figure 4 yes Figure 1 A schematic diagram of a central cutting blade assembly;

[0022] Figure 5 yes Figure 1 Another structural diagram of the middle cutting blade assembly;

[0023] Figure 6 This is a schematic diagram of a battery electrode with rectangular defects.

[0024] Figure 7 This is a schematic diagram of a battery electrode with circular defects.

[0025] Figure label:

[0026] 1. Electrode clamping assembly; 11. Fixing clamp; 2. Electrode moving assembly; 21. Sliding component; 211. Slide rail; 212. Slide rod; 213. Limiting block; 22. Fixing component; 221. Connecting plate; 222. Pressure plate; 223. First fixing hole; 3. Cutting blade assembly; 31. Cutting blade; 311. Circular cutting blade; 312. Rectangular cutting blade; 32. Rotating blade knob; 33. Telescopic knob; 331. Vertical fine adjustment knob; 332. Vertical coarse adjustment knob; 34. Cutting blade body; 4. Blade holder; 5. Battery electrode. Detailed Implementation

[0027] Preferred embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios. Such changes in application scenarios do not deviate from the basic principles of this application and fall within the scope of protection of this application.

[0028] In the embodiments of this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for better describing the embodiments of this application and their implementations, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0029] It should be noted that, in the description of this preferred embodiment, unless otherwise explicitly specified and limited, the terms "connected" and "connected" should be interpreted broadly. For example, they can refer to mechanical connections or electrical connections, direct connections or indirect connections through an intermediate medium, or connections within two components. These should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only, and those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0030] This application provides a cutting device, combined with Figure 1 and Figure 2 As shown, the cutting device provided in this application includes an electrode clamping assembly 1, an electrode moving assembly 2, and a cutting blade assembly 3.

[0031] The electrode clamping assembly 1 is used to clamp the battery electrode 5. By clamping the battery electrode 5 with the electrode clamping assembly 1, the battery electrode 5 can be kept flat and extended.

[0032] The electrode moving assembly 2 includes a slider 21 and a fixing member 22. The fixing member 22 is fixed to the slider 21, and the slider 21 is movable in a first direction. The fixing member 22 is used to fix and hold the battery electrode 5 on the electrode clamping assembly 1. It can be understood that the electrode clamping assembly 1 is used to clamp the battery electrode 5, and the fixing member 22 fixes the combined structure of the battery electrode 5 and the electrode clamping assembly 1 by fixing the electrode clamping assembly 1. When the fixing member 22 has fixed the combined structure of the battery electrode 5 and the electrode clamping assembly 1, the operator can move the battery electrode 5 by moving the slider 21.

[0033] The cutter assembly 3 includes a height-adjustable cutter 31, which is movable along a second direction, with the first direction being perpendicular to the second direction.

[0034] Under the premise of adopting the above technical solution, the electrode clamping assembly 1 can initially clamp the battery electrode 5, keeping the battery electrode 5 flat. The fixing member 22 of the electrode moving assembly 2 can fix the electrode clamping assembly 1, thereby fixing the battery electrode 5. At the same time, moving the cutter 31 along the second direction can position the cutter 31 at the required cutting position. By adjusting the height of the cutter 31, the cutting depth can be adjusted. Then, pulling the sliding member 21 of the electrode moving assembly 2 can move the battery electrode 5 along the first direction, cutting out the defect of the required shape. The cutting device provided in this application can control the shape and depth of the defect in the battery electrode, which is beneficial to improving the cutting accuracy. Moreover, the structure of the cutting device is relatively simple, which is beneficial to reducing the manufacturing cost of the cutting device.

[0035] In some embodiments, combined with Figure 1 and Figure 2 As shown, the fixing member 22 includes a connecting plate 221 and a pressure plate 222. The connecting plate 221 is fixed to the sliding member 21, and the pressure plate 222 is detachably connected to the connecting plate 221. The pressure plate 222 and the connecting plate 221 are used to cooperate in fixing the battery electrode 5 to the electrode clamping assembly 1 during the use of the cutting device. With this configuration, after the electrode clamping assembly 1 clamps the battery electrode 5, the combined structure of the battery electrode 5 and the electrode clamping assembly 1 is placed between the connecting plate 221 and the pressure plate 222. Then, the pressure plate 222 is fixed to the connecting plate 221, thus fixing the battery electrode 5 to the electrode moving assembly 2. The operator can move the battery electrode 5 by moving the sliding member 21 of the electrode moving assembly 2.

[0036] Optionally, the connecting plate 221 and the sliding member 21 are fixedly connected by means of adhesive bonding, fastener connection, or threaded connection. Alternatively, the connecting plate 221 and the sliding member 21 are integrally formed. The connection method of the fastener 221 and the sliding member 21 can be flexibly selected according to actual needs.

[0037] In some embodiments, combined with Figure 1 and Figure 3 As shown, the sliding member 21 includes two parallel slide rails 211 and two slide rods 212 that cooperate with the slide rails 211. The two ends of the connecting plate 221 are fixedly connected to the two slide rods 212 respectively, and the slide rods 212 protrude towards the side away from the connecting plate 221. By including two parallel slide rails 211 in the sliding member 21, the sliding stability of the sliding member 21 is improved. At the same time, fixing the two slide rods 212 with the connecting plate 221 facilitates the installation of the slide rods 212 into the slide rails 211.

[0038] In some embodiments, combined with Figure 1 As shown, the two ends of the connecting plate 221 and the pressure plate 222 extend to the outside of the electrode clamping assembly 1. The connecting plate 221 has first fixing holes 223 at both ends, and the pressure plate 222 has corresponding second fixing holes at both ends. The first fixing holes 223 and the second fixing holes are detachably connected by screws. By screwing the connecting plate 221 and the pressure plate 222 to the outside of the electrode clamping assembly 1 through the first fixing holes 223 and the second fixing holes, the pressure plate 222 can be fixed to the connecting plate 221. This securely clamps the battery electrode 5 and the electrode clamping assembly 1 using the connecting plate 221 and the pressure plate 222. This design ensures that the battery electrode 5 will not move or shift during the experiment, thus guaranteeing the accuracy of the battery electrode 5 cutting. Furthermore, the screw connection of the first fixing holes 223 and the second fixing holes allows for easy disassembly and installation of the connecting plate 221 and the pressure plate 222. This detachable design facilitates the replacement of the battery electrode 5, reduces experimental preparation time, and improves experimental efficiency.

[0039] In some embodiments, combined with Figure 1 As shown, the slide bar 212 has a scale, and its first end extends to the outside of the slide rail 211. A movable limiting block 213 is located at the first end of the slide bar 212. With this configuration, the cutter 31 and the battery electrode 5 are adjusted so that the cutter 31 is positioned at the starting position for cutting the battery electrode 5. Then, the position of the limiting block 213 is adjusted so that the distance between the limiting block 213 and the end of the slide rail 211 equals the target cutting length, and the limiting block 213 is fixed. During the cutting process, the slide bar 212 is pulled along the first direction, causing the distance between the limiting block 213 and the end of the slide rail 211 to gradually decrease. After the cutting length reaches the target cutting length, the limiting block 213 abuts against the end of the slide rail, preventing the slide bar 212 from moving further, thus completing the cutting. This improves cutting accuracy. For example, if the target cutting length is 5mm, the distance between the limiting block 213 and the end of the slide rail 211 is set to 5mm.

[0040] Understandably, when the cutting device has two slide bars 212, both slide bars 212 are equipped with graduations, and both slide bars 212 have movable limiting blocks 213 at their first ends. This helps to further improve the accuracy of cutting.

[0041] In some embodiments, combined with Figure 1 As shown, the electrode clamping assembly 1 includes two opposing clamps 11, which are used to clamp the two opposite ends of the battery electrode 5. With this configuration, when the battery electrode 5 is clamped, both sides receive balanced support from the clamps 11, keeping the battery electrode 5 flat and extended.

[0042] In some embodiments, the length of the fixing clip 11 along the first direction is greater than or equal to the length of the battery electrode 5. This arrangement ensures the clamping effect of the fixing clip 11 on the battery electrode 5, which helps to keep the battery electrode 5 flat and extended.

[0043] In some embodiments, combined with Figure 1 As shown, the fixing clamp 11 includes a fixing groove and groove walls located on both sides of the fixing groove. The two opposite ends of the battery electrode 5 are adapted to be inserted into the fixing groove, and the groove walls can clamp the battery electrode 5 under the action of the fixing member 22. This arrangement facilitates the disassembly and installation of the battery electrode 5. Specifically, during the installation of the battery electrode 5, inserting the two ends of the battery electrode 5 into the fixing groove of the fixing clamp 11 can initially fix the battery electrode 5. Then, the combined structure of the battery electrode 5 and the fixing clamp 11 is placed between the connecting plate 221 and the pressure plate 222 of the fixing member 22, thereby using the fixing member 22 to clamp the fixing clamp 11. Under the clamping force of the fixing member 22, the two groove walls of the fixing clamp 11 deform to a certain extent, further clamping the battery electrode 5 and preventing the battery electrode 5 from shifting during the cutting process. Since the fixing groove initially fixes the battery electrode 5, the electrode ends of the battery electrode 5 can be easily inserted into the fixing groove.

[0044] In some embodiments, combined with Figure 1 As shown, the cutting device also includes a tool holder 4 extending along the second direction, and the cutting tool assembly 3 is movably mounted on the tool holder 4. The tool holder 4 facilitates the support and mounting of the cutting tool assembly 3, and allows for easy changes in the position of the cutting tool assembly 3 along the second direction, thereby improving cutting accuracy.

[0045] Optionally, the tool holder 4 is provided with a scale, which facilitates the positioning of the cutting assembly 3 and improves the cutting accuracy of the battery electrode 5.

[0046] In some embodiments, combined with Figure 4 and Figure 5As shown, the cutter 31 includes a circular cutter 311 or a rectangular cutter 312. The circular cutter 311 facilitates the creation of circular defects on the battery electrode 5, while the rectangular cutter 312 facilitates the creation of rectangular defects on the battery electrode 5.

[0047] Optionally, combined Figure 4 As shown, the cutter assembly 3 includes a cutter body 34, a rotating knob 32, and a telescopic knob 33. The rotating knob 32 is disposed on the cutter body 34 and can be driven to rotate to drive the cutter 31 to rotate. The telescopic knob 33 is disposed on the cutter body 34 and can be driven to rotate to drive the cutter 31 to move in the vertical direction.

[0048] The cutter body 34 constitutes the main body of the cutter assembly 3 and is used to install the other components of the cutter assembly 3. The rotary knob 32 can be driven to rotate to drive the cutter 31 to rotate, thereby facilitating the production of circular defects on the battery electrode sheet 5 in conjunction with the circular cutter 311. The telescopic knob 33 can be driven to rotate to move the cutter 31 in the vertical direction, thereby adjusting the height of the cutter 31 in the vertical direction and adjusting the cutting depth.

[0049] Optionally, combined Figure 4 As shown, the telescopic knob 33 includes a vertical fine-tuning knob 331 and a vertical coarse-tuning knob 332. Using the vertical coarse-tuning knob 332, the operator can quickly move the cutter 31 to a position close to the target height, thus saving time and improving adjustment efficiency. When the cutter 31 is moved to a position close to the target height, the vertical fine-tuning knob 331 can be used for more precise adjustments to ensure the cutter 31 is at the target height, which helps improve cutting accuracy and efficiency.

[0050] Alternatively, by selecting cutters 31 of different widths, defects of different widths can be created on the battery electrode 5.

[0051] Combination Figure 7 and Figure 1 As shown, the cutting device provided in this application is used as follows when cutting circular defects: The battery electrode 5 is removed, and the electrode clamping assembly 1 is clamped onto the battery electrode 5, making the battery electrode 5 flat and extended; then, the battery electrode 5 with the electrode clamping assembly 1 is passed through the connecting plate 221 and pressure plate 222 of the fixing member 22, and the pressure plate 222 and connecting plate 221 are firmly fixed together with screws, so that the pressure plate 222 and connecting plate 221 further clamp the battery electrode 5. The required circular cutter is replaced. The cutter 31 is moved to the starting position for cutting above the battery electrode 5, and the rotary cutter knob 32 is rotated to make the cutter 31 scrape a circular defect on the battery electrode 5. Figure 7 The circular defect shown is then removed, and the cutter 31 is raised.

[0052] Combination Figure 6 and Figure 1 As shown, the cutting device provided in this application is used as follows when cutting rectangular defects: The battery electrode 5 is removed, and the electrode clamping assembly 1 is clamped onto the battery electrode 5, making the battery electrode 5 flat and extended; then, the battery electrode 5 with the electrode clamping assembly 1 is passed through the connecting plate 221 and pressure plate 222 of the fixing member 22, and the pressure plate 222 and connecting plate 221 are firmly fixed together with screws, so that the pressure plate 222 and connecting plate 221 further clamp the battery electrode 5. The required rectangular cutter is replaced. The cutter 31 is moved to the starting position for cutting above the battery electrode 5, and the distance between the limiting block 213 and the end of the slide rail 211 is adjusted so that the distance between the limiting block 213 and the end of the slide rail 211 is equal to the target cutting length. The slide bar 212 is pulled to advance the battery electrode 5 forward by the target cutting length, causing the cutter 31 to scrape a [details missing] on the battery electrode 5. Figure 6 The rectangular defect shown is then removed, and the cutter 31 is raised.

[0053] The technical solutions of this application have been described in conjunction with the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions resulting from these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A cutting device for battery electrodes, characterized in that, The cutting device includes: An electrode clamping assembly (1) is used to clamp the battery electrode (5); The electrode moving assembly (2) includes a slider (21) and a fixing member (22) fixed to the slider (21). The slider (21) is movable in a first direction, and the fixing member (22) is used to fix the battery electrode (5) clamped on the electrode clamping assembly (1). The cutting assembly (3) includes a height-adjustable cutter (31) that is movable in a second direction to cut the battery electrode (5). Wherein, the first direction is perpendicular to the second direction.

2. The cutting device according to claim 1, characterized in that, The fixing member (22) includes a connecting plate (221) and a pressure plate (222); wherein the connecting plate (221) is fixed to the sliding member (21), the pressure plate (222) is detachably connected to the connecting plate (221), and the pressure plate (222) and the connecting plate (221) are used to cooperate in fixing the battery electrode (5) on the electrode clamping assembly (1) when the cutting device is in use.

3. The cutting device according to claim 2, characterized in that, The sliding member (21) includes two parallel slide rails (211) and two slide rods (212) that cooperate with the slide rails (211). The two ends of the connecting plate (221) are fixedly connected to the two slide rods (212) respectively, and the slide rods (212) protrude to the side away from the connecting plate (221).

4. The cutting device according to claim 2, characterized in that, The two ends of the connecting plate (221) and the pressure plate (222) extend to the outside of the electrode clamping assembly (1). The two ends of the connecting plate (221) are provided with a first fixing hole, and the two ends of the pressure plate (222) are provided with a second fixing hole. The first fixing hole and the second fixing hole are detachably connected by screws.

5. The cutting device according to claim 3, characterized in that, The slide bar (212) is provided with a scale, the first end of the slide bar (212) extends to the outside of the slide rail (211), and the first end of the slide bar (212) is provided with a movable limiting block (213).

6. The cutting device according to claim 1, characterized in that, The electrode clamping assembly (1) includes two fixing clips (11) arranged opposite to each other, which are used to clamp the two opposite electrode ends of the battery electrode (5).

7. The cutting device according to claim 6, characterized in that, Along the first direction, the length of the fixing clip (11) is greater than or equal to the length of the battery electrode (5).

8. The cutting device according to claim 6, characterized in that, The fixing clamp (11) includes a fixing groove and groove walls located on both sides of the fixing groove. The electrode end is adapted to be inserted into the fixing groove, and the groove walls can clamp the battery electrode (5) under the action of the fixing member (22).

9. The cutting device according to any one of claims 1 to 8, characterized in that, The cutting device further includes a tool holder (4) extending along the second direction, and the cutting tool assembly (3) is movably disposed on the tool holder (4).

10. The cutting device according to any one of claims 1 to 8, characterized in that, The cutter (31) includes a circular cutter or a rectangular cutter; wherein, the cutter assembly (3) further includes: Cutting blade body (34); A rotary knob (32), located on the cutter body (34), is driven to rotate to rotate the cutter (31); and A telescopic knob (33) is provided on the cutter body (34) and can be driven to rotate to move the cutter (31) in the vertical direction.

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