Pole piece cutting assembly and pole piece cutting machine
By setting up elastic clamping components in the cutting machine to fix and shape the electrode sheets, the problem of deformation during the electrode sheet cutting process is solved, cutting accuracy is improved and safety risks are reduced.
Patent Information
- Application Number
- CN202422951973.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing lithium battery electrode cutting machines are prone to causing electrode bending and wrinkling during the cutting process, resulting in low cutting accuracy and a safety risk of lithium dendrites piercing the separator.
The method involves setting first and second cutters in a cutting machine, and installing first and second elastic clamping elements on each cutter. The elastic clamping elements fix and shape the electrode sheet to prevent deformation during the cutting process.
This improves the precision of electrode cutting, reduces the risk of lithium dendrites puncturing the separator, and ensures battery performance and safety.
Smart Images
Figure CN223684511U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to secondary battery technical field, concretely relates to a polar piece cutting assembly and polar piece cutting machine. BACKGROUND
[0002] Polar piece cutting is an important procedure of lithium battery lamination manufacturing process, and the existing cutting machine is relatively mature, and the polar piece cutting machine in the prior art can cut the lithium battery polar piece, but the polar piece cutting machine is easy to cause the bending and wrinkle of the lithium battery polar piece during the cutting process, so that the precision of the cut lithium battery polar piece is low. When the polar piece is bent, the polar piece is folded to the dressing area, the battery core circulates, the cathode sheet releases lithium ions without anode dressing, and under the condition of long-term circulation, lithium dendrites are easy to appear, there is a risk of piercing the diaphragm, resulting in short circuit of the cathode and anode, and safety risk is caused. Therefore, the polar piece cutting process needs to avoid these problems, improve the process quality, and ensure the performance and safety of the battery.
[0003] Therefore, it is necessary to provide a technical solution to solve the above problems. UTILITY MODEL CONTENT
[0004] One of the purposes of the utility model is: in view of the defects of the prior art, a polar piece cutting assembly is provided to improve the deformation of the polar piece after cutting and prevent the problem of polar piece folding.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0006] A polar piece cutting assembly comprises:
[0007] A first cutter;
[0008] A second cutter is arranged opposite to the first cutter;
[0009] A first elastic pressing piece is installed on the first cutter;
[0010] A second elastic pressing piece is installed on the second cutter;
[0011] The first elastic pressing piece is arranged opposite to the second elastic pressing piece.
[0012] Preferably, the first elastic pressing piece comprises a first pressing block and a first elastic piece arranged between the first pressing block and the first cutter;
[0013] The second elastic pressing piece comprises a second pressing block and a second elastic piece arranged between the second pressing block and the second cutter.
[0014] Preferably, the first elastic pressing member is mounted on the first cutter through a first mounting member; and the second elastic pressing member is mounted on the second cutter through a second mounting member.
[0015] The first elastic pressing member comprises a first pressing block and a first elastic member arranged between the first pressing block and the first mounting member.
[0016] The second elastic pressing member comprises a second pressing block and a second elastic member arranged between the second pressing block and the second mounting member.
[0017] Preferably, the first mounting member comprises a first fixing member mounted on the first cutter and a first sliding block slidingly mounted on the first fixing member; and the second mounting member comprises a second fixing member mounted on the second cutter and a second sliding block slidingly mounted on the second fixing member.
[0018] One end of the first elastic member is connected with the first pressing block, and the other end of the first elastic member is connected with the first sliding block.
[0019] One end of the second elastic member is connected with the second pressing block, and the other end of the second elastic member is connected with the second sliding block.
[0020] Preferably, the first elastic pressing member is provided with at least two first elastic pressing members for pressing the edge of one side surface of the pole piece.
[0021] The second elastic pressing member is provided with at least one second elastic pressing member for pressing the middle of the other side surface of the pole piece.
[0022] Preferably, the first elastic member and the second elastic member are both springs or elastic rubbers.
[0023] And / or, the first elastic member and the second elastic member are both provided with at least two.
[0024] Preferably, the first pressing block and the second pressing block both comprise a planar portion and an inclined surface portion inclined away from the pole piece on one side of the planar portion.
[0025] Preferably, the included angle α between the planar portion and the inclined surface portion is 10°-60°.
[0026] Preferably, the pole piece cutting machine further comprises a guide clamping plate for preventing the pole piece from being displaced; the guide clamping plate comprises a first clamping plate and a second clamping plate arranged opposite to the first clamping plate, and a slit for the pole piece to pass through is formed between the first clamping plate and the second clamping plate.
[0027] The second purpose of the utility model is to provide a pole piece cutting machine comprising the pole piece cutting assembly of any one of the above.
[0028] Compared with the prior art, the component for cutting the pole piece has the advantages that the pressing block arranged on the cutter restricts the deformation of the pole piece when the pole piece is running; the pressing block simultaneously performs shaping and pressing on the pole piece when the pressing block is pressed, so that the anti-deformation effect is generated on the dressing cutoff line of the pole piece, thereby inhibiting the deformation of the pole piece after cutting, and under long-term cycling of the battery, the lithium dendrite of the pole piece pierces the diaphragm, so that the safety risk of short circuit of the cathode and anode is generated. BRIEF DESCRIPTION OF DRAWINGS
[0029] Figure 1 FIG. 1 is a structural schematic view of a pole piece cutting component according to an embodiment of the present application;
[0030] Figure 2 FIG. 2 is a structural side view of the pole piece cutting component according to the embodiment of the present application;
[0031] 1- first cutter; 11- first elastic pressing member; 111- first elastic member; 112- first pressing member; 12- first mounting member; 13- first sliding block member;
[0032] 2- second cutter; 21- second elastic pressing member; 211- second elastic member; 212- second pressing member; 22- second mounting member; 23- second sliding block member; 3- material guide clamping plate. DETAILED DESCRIPTION
[0033] In order to make the technical scheme and advantages of the present application clearer, the following will further describe the present application and its advantages in detail with specific embodiments and the accompanying drawings, but the embodiments of the present application are not limited to this.
[0034] In the description of the present application, unless explicitly defined and limited, the terms "mounting", "connection", "connecting", "fixing" should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.
[0035] The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the machinery, parts and equipment adopt conventional models in the prior art, and the conventional connection mode in the prior art is adopted for circuit connection, which will not be described in detail here. The terms "first" and "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.
[0036] As shown in Figure 1 The pole piece cutting assembly provided in the embodiment includes: a first cutter 1; a second cutter 2; a first elastic pressing piece 11; a second elastic pressing piece 21;
[0037] In the embodiment, the second cutter 2 is oppositely arranged with the first cutter 1, the first elastic pressing piece 11 is installed on the first cutter 1, the second elastic pressing piece 21 is installed on the second cutter 2, and the first elastic pressing piece 11 is oppositely arranged with the second elastic pressing piece 12, for pressing the two sides of the pole piece.
[0038] In the cutting process, the elastic pressing piece fixes the pole piece in a proper position to prevent movement or deviation during the cutting process, thereby ensuring the accuracy of cutting. In addition, burrs and impurities generated during the cutting of the pole piece can cause internal short circuit of the battery, and the elastic pressing piece in the utility model can weaken the occurrence of these problems.
[0039] In the embodiment, the first elastic pressing piece 11 includes a first pressing block 112 and a first elastic piece 111 arranged between the first pressing block 112 and the first cutter 1; and the second elastic pressing piece 21 includes a second pressing block 212 and a second elastic piece 211 arranged between the second pressing block 212 and the second cutter 2. The elastic piece is connected to the pressing block, and the elastic deformation size of the elastic piece drives the pressing force of the pressing block on the pole piece.
[0040] In the embodiment, the first elastic pressing piece 11 is installed on the first cutter 1 through a first mounting piece 12; the second elastic pressing piece 21 is installed on the second cutter 2 through a second mounting piece 22; the first elastic pressing piece 11 includes a first pressing block 112 and a first elastic piece 111 arranged between the first pressing block 112 and the first mounting piece 12; and the second elastic pressing piece 21 includes a second pressing block 212 and a second elastic piece 211 arranged between the second pressing block 212 and the second mounting piece 22.
[0041] In an embodiment according to the application, the first mounting member 12 comprises a first fixed member mounted on the first cutting knife 1 and a first sliding block 13 slidingly mounted on the first fixed member; the second mounting member 22 comprises a second fixed member mounted on the second cutting knife and a second sliding block 23 slidingly mounted on the second fixed member; one end of the first elastic member 111 is connected with the first pressing block 112, and the other end of the first elastic member 111 is connected with the first sliding block 13; one end of the second elastic member 211 is connected with the second pressing block 212, and the other end of the second elastic member 211 is connected with the second sliding block 23.
[0042] In an embodiment according to the application, the first elastic pressing member 11 is provided with at least two, respectively used for pressing the edge of one side surface of the pole piece; the second elastic pressing member 21 is provided with at least one, used for pressing the middle part of the other side surface of the pole piece.
[0043] In an embodiment according to the application, the first elastic member 111 and the second elastic member 211 are both springs or elastic rubbers; the first elastic member 111 and the second elastic member 211 are both provided with at least two.
[0044] In an embodiment according to the application, the first pressing block 112 and the second pressing block 212 both comprise a planar part and an inclined part inclined away from the pole piece from the planar part.
[0045] In an embodiment according to the application, the included angle α between the planar part and the inclined part is 10°-60°. The setting of the inclined part on the pressing block can prevent the dressing on the pole piece from rubbing against the edge of the planar part when the pole piece is pressed by the planar part, thereby causing the dressing to fall off.
[0046] In an embodiment according to the application, it further comprises a guide clamping plate 3 for preventing the pole piece from being displaced; the guide clamping plate 3 comprises a first clamping plate and a second clamping plate oppositely arranged with the first clamping plate, and a slit for the pole piece to pass through is formed between the first clamping plate and the second clamping plate.
[0047] In an embodiment according to the application, the first elastic pressing member 11 is provided with at least two, respectively used for pressing the edge of one side surface of the pole piece; the second elastic pressing member 21 is provided with at least one, used for pressing the middle part of the other side surface of the pole piece.
[0048] The two or more first elastic pressing members 11 can better control the edge of the coating cutoff line of the pole piece coating area, and the distance between the two adjacent first elastic pressing members 11 can be adjusted according to the size of the pole piece, so as to be matched with the size of the pole piece; and the second elastic pressing member 21 arranged oppositely can press the other side surface of the pole piece; therefore, the cooperation of the first elastic pressing member 11 and the second elastic pressing member 21 improves the overall control of the shape of the pole piece, and effectively resists the deformation of the pole piece after cutting.
[0049] It should be noted that the number of the first elastic pressing member 11 and the second elastic pressing member 21 can be adjusted according to actual needs, for example, a plurality of second elastic pressing members 21 can be arranged along the coating cutoff line of the pole piece, so as to suppress the deformation of the pole piece after cutting. For another example, one first elastic pressing member 11 and one second elastic pressing member 21 can be arranged, and the size thereof is matched with the width of the pole piece, so as to effectively suppress the deformation of the pole piece after cutting.
[0050] The utility model also provides a pole piece cutting machine which comprises the pole piece cutting assembly.
[0051] The specific implementation steps of the pole piece cutting machine are as follows:
[0052] The pole piece is fed under the traction of the winding needle and the tension;
[0053] When the cutting position is sensed by the sensor, the pole piece is clamped by the feeding clamp plate 3, and the pole piece is continuously fed forward;
[0054] When the anode single-side coating area approaches the cutting knife area, the first elastic pressing member and the second elastic pressing member arranged at the first cutting knife 1 and the second cutting knife 2 bind the pole piece;
[0055] When the cutting position reaches the cutting position, the first cutting knife 1 and the second cutting knife 2 are close to each other and drive the first elastic pressing member and the second pressing member to move together;
[0056] The first pressing block 112 and the second pressing block 212 first contact the pole piece, and continuously press the pole piece by moving with the cutting knife through the first elastic member 111 and the second elastic member 211;
[0057] When the first cutting knife 1 and the second cutting knife 2 cut the pole piece, the first pressing block 112 and the second pressing block 212 press the pole piece, prevent the stress from being released at the moment of cutting, simultaneously reshape the pole piece, form a straight line at the coating cutoff position, and play a role similar to a reinforcing rib, and effectively suppress the deformation of the pole piece after cutting;
[0058] The cutting action is completed, the cutter is opened; the first pressing block 112 and the second pressing block 212 are opened synchronously with the opening of the cutter, but under the slow compression of the first elastic member 111 and the second elastic member 211, the pressing blocks slowly separate from the pole piece, avoiding instantaneous action and causing deformation rebound; until the first elastic member 111 and the second elastic member 211 are compressed to the elastic limit, the cutter continues to open to the limit gap state, reserving space for the next time entering the pole piece; the action is completed.
[0059] According to the disclosure and teaching of the above description, those skilled in the art of the present application can also make changes and modifications to the above embodiments. Therefore, the present application is not limited to the above specific embodiments, and any obvious improvements, replacements or modifications made by those skilled in the art on the basis of the present application shall fall within the scope of the present application. In addition, although some specific terms are used in the specification, these terms are only for convenience of description and do not constitute any limitation on the present application.
Claims
1. A pole piece trimming assembly, characterized in that, include: First cut; The second cutter is positioned opposite to the first cutter; A first elastic clamping element is installed on the first cutter; A second elastic clamping element is installed on the second cutter; The first elastic clamping member and the second elastic clamping member are disposed opposite to each other; The first elastic clamping member is mounted on the first cutter via a first mounting member, and the second elastic clamping member is mounted on the second cutter via a second mounting member. The first elastic clamping member includes a first clamping block and a first elastic member disposed between the first clamping block and the first mounting member. The second elastic clamping member includes a second clamping block and a second elastic member disposed between the second clamping block and the second mounting member. The first mounting component includes a first fixing component mounted on the first cutter and a first slider slidably mounted on the first fixing component. The second mounting component includes a second fixing component mounted on the second cutter and a second slider slidably mounted on the second fixing component. One end of the first elastic component is connected to the first clamping block, and the other end of the first elastic component is connected to the first slider. One end of the second elastic component is connected to the second clamping block, and the other end of the second elastic component is connected to the second slider. It also includes a guide clamp for preventing electrode conveyor belt displacement, the guide clamp comprising a first clamp and a second clamp disposed opposite to the first clamp, a slit formed between the first clamp and the second clamp for the electrode to pass through.
2. The pole piece trimming assembly of claim 1, wherein: The first elastic clamping member is provided in at least two parts, each used to clamp the edge of one side surface of the electrode sheet; The second elastic clamping member is provided with at least one for clamping the middle part of the other side surface of the electrode.
3. The pole piece trimming assembly of claim 1, wherein: Both the first elastic element and the second elastic element are springs or elastic rubber; And / or, at least two of the first elastic element and the second elastic element are provided.
4. The pole piece trimming assembly of claim 1, wherein: Both the first clamping block and the second clamping block include a flat portion and a beveled portion that slopes away from the electrode from the flat portion.
5. The pole piece trimming assembly of claim 4, wherein: The angle α between the flat portion and the inclined portion is 10° to 60°.
6. An electrode tab cutting machine characterized by: Includes the electrode cutting assembly as described in any one of claims 1 to 5.