Feeding clamping plate and clamping device

Abstract

The utility model discloses a feeding clamping plate and a clamping device, the feeding clamping plate is used for clamping a pole piece, the feeding clamping plate comprises a plate body, the plate body comprises a first plane, and the first plane is used for abutting against the pole piece; a first airflow channel for air to pass through is formed in the plate body. According to the utility model, the feeding clamping plate with the first gas flow channel is used for clamping the pole piece, and when gas with a certain temperature flows through the first gas flow channel, the heat of the gas is transferred to the plate body and further transferred to the pole piece clamped by the plate body, so that the temperature of the pole piece is increased and the stress in the pole piece is released. Moreover, the gas heating temperature is easy to control, and the temperatures of the plate body and the pole piece can be accurately and quickly adjusted by adjusting the temperature and the flow velocity of the gas, so that the yield of the prepared pole piece is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pole piece processing, in particular to a feeding clamping plate and a clamping device. Background Art

[0002] With the increasing use of electronic products, the use of lithium-ion batteries is also increasing. Lithium-ion batteries, with their high energy density, long cycle life, low pollution, and recyclability, have become the energy source for most electronic products. The core of a lithium-ion battery lies in the cell, which is composed of a wound or stacked positive and negative electrodes with a separator between them.

[0003] In existing battery cell structures, the tip of the electrode has a single-sided dressing area and a bare foil area. This creates asymmetric stress on both sides of the electrode during rolling due to the asymmetry of the current collector in this area, resulting in a stress differential. This stress differential can easily cause the cut electrode to deform and curl, with the degree of curvature increasing the closer it is to the bare foil. This can eventually scratch the separator or cause the separator to buckle, preventing the electrode from covering the positive electrode, impacting the cell yield. Utility Model Content

[0004] The main purpose of the utility model is to provide a feeding clamping plate, aiming to solve the problem that the existing pole pieces are prone to curling after being cut.

[0005] To achieve the above-mentioned purpose, the present invention proposes a feeding clamp for clamping the pole piece, wherein the feeding clamp includes a plate body, the plate body includes a first plane, and the first plane is used to abut the pole piece; a first airflow channel for gas to pass through is constructed in the plate body.

[0006] In some embodiments, the first air flow channel includes an air outlet hole, and the air outlet hole is provided at one end of the plate body close to the hollow foil area of ​​the pole piece.

[0007] In some embodiments, there are a plurality of first airflow channels, and the plurality of first airflow channels are arranged in parallel and at intervals within the plate body along the moving direction of the feeding splint during operation.

[0008] In some embodiments, the feeding clamp further includes a heating element, at least a portion of which is disposed on the plate body.

[0009] In some embodiments, a mounting portion is configured at one end of the plate away from the hollow foil area of ​​the pole piece, the thickness of the mounting portion is greater than the thickness of the plate, and the heating element is disposed in the mounting portion.

[0010] In some embodiments, a second air flow channel is provided in the mounting portion, the second air flow channel is connected to the first air flow channel, and at least a portion of the heating element is located in the second air flow channel.

[0011] In some embodiments, the feeding clamp also includes a connecting seat, which is arranged at one end of the plate body away from the empty foil area of ​​the pole piece, and is used to connect to an external moving device and drive the feeding clamp to move under the control of the external moving device.

[0012] In some embodiments, a groove is configured on the mounting portion, and a protrusion is configured on the connecting seat corresponding to the groove, and the protrusion is detachably connected to the groove.

[0013] In some embodiments, the feeding clamp includes a temperature detection component, which is arranged on the plate body and is used to detect the temperature of the plate body.

[0014] The present invention further provides a clamping device, which includes two feeding clamps as described in the above embodiments, and the first planes of the two feeding clamps are arranged opposite to each other for clamping the pole piece.

[0015] This invention uses a feed clamping plate with a first gas flow channel to clamp the electrode. When gas at a certain temperature flows through the first gas flow channel, the heat of the gas is transferred to the plate body, and then to the electrode clamped by the plate body, causing the electrode to heat up and relieve its internal stress. The temperature of the gas heating is also easy to control. By adjusting the temperature and flow rate of the gas, the temperature of the plate body and the electrode can be accurately and quickly adjusted, thereby improving the yield rate of the electrode production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of an embodiment of the feeding splint of the utility model;

[0017] Figure 2 This is a cross-sectional view of an embodiment of the feeding splint of the utility model;

[0018] Figure 3 This is a cross-sectional view of an embodiment of the feeding splint of the utility model;

[0019] Figure 4 This is a cross-sectional view of an embodiment of the feeding splint of the utility model;

[0020] Figure 5 This is a structural schematic diagram of another embodiment of the feeding splint of the utility model.

[0021] Reference numerals:

[0022] 10. Pole piece; 11. Empty foil area; 100. Plate body; 110. First plane; 120. First air flow channel; 121. Air outlet; 130. Mounting portion; 131. Groove; 140. Second air flow channel; 200. Heat generating element; 300. Connecting seat; 310. Protrusion; 320. Second plane. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the schemes in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0026] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0027] The utility model proposes a feeding splint, referring to Figure 1 and Figure 2 , the feeding splint includes:

[0028] The plate body 100 includes a first plane 110 , and the first plane 110 is used to abut against the pole piece 10 ; a first air flow channel 120 is constructed in the plate body 100 , and the first air flow channel 120 is used for allowing gas to pass through and heat the plate body 100 .

[0029] Because the head area of ​​the pole piece 10 is subjected to uneven pressure during rolling, it is prone to curling during cutting. In view of this, the present invention uses a feeding clamp to heat the pole piece 10, so that the atoms or molecules in the pole piece 10 obtain more thermal energy, move more actively, and cause the bonds between the atoms to rearrange, thereby releasing the stress within the material.

[0030] Among them, the plate body 100 of the feeding splint plays an important supporting and heating role. The plate body 100 includes a flat first plane 110, which is used to be in close contact with the pole piece 10 to avoid scratching the pole piece 10 while providing a stable clamping effect. The plate body 100 can be made of high thermal conductivity materials such as stainless steel and aluminum alloy to ensure that the feeding splint has sufficient structural strength, as well as good heat resistance and thermal conductivity. The size of the plate body 100 can be set according to the size of the pole piece 10, and the shape of the plate body 100 can be rectangular, trapezoidal or other shapes, which is not limited by the present invention.

[0031] The first air flow channel 120 is provided inside the plate body 100, and is used to guide the heated gas to circulate and complete the heating of the plate body 100. Its shape can be selected according to design requirements. For example, the first air flow channel 120 can be linear, and is provided along the length, width, or diagonal direction of the plate body 100 to form a linear channel parallel to the plane of the plate body 100. Its preparation is relatively simple, the gas flow path is short, and the flow process is not easily obstructed; further, the first air flow channel 120 can be a grid type, consisting of cross-arranged linear first air flow channels 120, so that the gas can flow in multiple directions to achieve more uniform heating; the first air flow channel 120 can also be serpentine, extending the path of the gas flowing in the first air flow duct, increasing the contact area between the gas and the plate body 100, thereby improving the heat transfer efficiency.

[0032] It is understandable that two feeding clamps in this application can be used to clamp the electrode 10, or a single feeding clamp and other supports can be used to clamp the electrode 10. During operation, the head area of ​​the electrode 10 is tightly clamped on the first plane 110 of the plate body 100, and the electrode 10 and the feeding clamp are in a state of continuous movement toward the feeding roller. At this time, heated gas is introduced into the first air flow channel 120, which increases the temperature of the plate body 100 and further transfers the heat to the clamped electrode 10, so that the electrode 10 is evenly heated, which can promote the gradual release of the stress inside the electrode 10. When the electrode 10 moves to the cutting position, the cutter cuts the electrode 10, and then the electrode 10 and the feeding clamp continue to move toward the feeding roller until the electrode 10 is clamped by the feeding roller. The feeding clamp is controlled to return to the starting position and the next electrode 10 feeding process is carried out.

[0033] The present invention utilizes a feed clamping plate with a first gas flow channel to clamp the electrode 10. When gas at a certain temperature flows through the first gas flow channel, the heat of the gas is transferred to the plate 100, and then to the electrode 10 clamped by the plate 100, thereby heating the electrode 10 and releasing its internal stress. Furthermore, the temperature of the heated gas is easily controlled. By adjusting the temperature and flow rate of the gas, the temperature of the plate 100 and the electrode 10 can be accurately and quickly adjusted, thereby improving the product quality of the electrode 10 and having significant practical value.

[0034] like Figure 2 and Figure 3 As shown, in some embodiments, the first air flow channel 120 includes an air outlet 121 , and the air outlet 121 is disposed at one end of the plate body 100 close to the empty foil area 11 of the pole piece 10 .

[0035] Specifically, since the cutting position is located in the empty foil area 11 of the electrode 10, the feeding clamp cannot be directly clamped in the empty foil area 11, and the empty foil area 11 is also prone to deformation during the cutting process. Therefore, in this embodiment, the air outlet 121 of the first air flow channel 120 is set toward the empty foil area 11 of the electrode 10, so that the gas flows through the entire first air flow channel 120 and is blown toward the empty foil area 11. This can not only increase the temperature of the empty foil area 11 to a certain extent, thereby releasing stress, but also form a layer of "air wall" around the empty foil area 11 with the help of the directional airflow blown out by the air outlet 121, avoiding the direct effect of traditional mechanical methods on the electrode 10, thereby reducing the mechanical damage of the electrode 10 during the cutting process, and suppressing the possible curling of the empty foil area 11 of the electrode 10, thereby improving the yield rate of the electrode 10.

[0036] Specifically, the shape of the air outlet 121 can be set according to design requirements and can be circular, elliptical, square, or other shapes. Furthermore, multiple air outlets 121 can be provided, and the air outlets 121 can be evenly arranged on the plate 100 to ensure stable and uniform gas flow. The position, size, and orientation of the air outlets 121 can also be optimized based on the shape of the electrode 10 and the location prone to curling to enhance the effect of suppressing curling of a certain portion of the empty foil area 11. For example, the air outlets 121 are directed to blow air toward both sides of the empty foil area 11, thereby improving the airflow's suppressive effect on the side edges of the empty foil area 11 and further reducing the probability of curling in the empty foil area 11.

[0037] like Figure 3 As shown, in some embodiments, there are a plurality of first air flow channels 120 , and the plurality of first air flow channels 120 are arranged in parallel in the plate body 100 at intervals along the moving direction of the feeding clamping plate during operation.

[0038] The parallel arrangement of multiple first airflow channels 120 ensures uniform distribution of gas within the plate body 100, allowing the gas to act on various areas of the plate body 100, thereby achieving uniform heating of the plate body 100. This reduces the probability of local overheating and damage to the pole piece 10, ensures uniform heating of the pole piece 10 during processing, and improves processing quality. Furthermore, multiple first airflow channels 120 can significantly increase the contact area between the gas and the plate body 100, thereby achieving a faster heating process, allowing the plate body 100 to reach the required operating temperature in a shorter time, thereby accelerating the temperature rise of the pole piece 10 and the release of internal stress.

[0039] The multiple first airflow channels 120 arranged along the moving direction can also reduce the kinetic energy loss of the gas in the first airflow channel 120, so that the airflow blows toward the empty foil area 11 of the pole piece 10 at a higher speed, thereby having a better heating effect on the empty foil area 11 and inhibiting curling.

[0040] like Figure 1 As shown, in some embodiments, the feeding clamp further includes a heating element 200 , and at least a portion of the heating element 200 is disposed on the plate body 100 .

[0041] The heating element 200 can be a resistance wire, which can generate heat when current flows through the resistance wire. It has a simple structure, high heating efficiency and low cost. The resistance wire is arranged in the plate body 100, and the heat generated when power is turned on heats the plate body 100 and conducts the heat to the electrode 10, thereby releasing the internal stress of the electrode 10. The heating element 200 can also be a heating film made of carbon fiber or graphene. The heating film is coated on the plate body 100 or arranged inside the plate body 100. When power is turned on, it can also generate heat to heat the plate body 100, and the heat transfer is also more uniform. By arranging the heating element 200 on the plate body 100, the heating speed of the feed splint is further improved, thereby accelerating the heating of the electrode 10 and the release of its internal stress.

[0042] like Figure 1 and Figure 5 As shown, in some embodiments, a mounting portion 130 is constructed at one end of the board 100 away from the empty foil area 11 of the pole piece 10 . The thickness of the mounting portion 130 is greater than the thickness of the board 100 , and the heating element 200 is disposed in the mounting portion 130 .

[0043] The thickness of the mounting portion 130 is greater than that of the other portions of the plate body 100, providing greater structural strength and support capabilities. This ensures that the heating element 200 can be securely mounted within the mounting portion 130 and is less susceptible to external vibration or operational influences, thereby improving the operational stability of the heating element 200. Furthermore, the provision of the mounting portion 130 allows the remaining portions of the plate body 100 to be provided with only the first airflow channel 120, significantly reducing the thickness. This increases the heating rate of the plate body 100, allowing the plate body 100 to reach the desired operating temperature in a shorter period of time, thereby accelerating the release of stress within the electrode 10.

[0044] like Figure 2 and Figure 4 As shown, in some embodiments, a second air flow channel 140 is provided in the mounting portion 130 , the second air flow channel 140 is connected to the first air flow channel 120 , and at least a portion of the heating element 200 is located in the second air flow channel 140 .

[0045] By placing at least a portion of the heating element 200 within the second airflow channel 140, the gas is fully heated before entering the first airflow channel 120. This allows the heat from the heating element 200 to be transferred to the gas and more quickly conducted to the plate body 100, thereby improving the heating efficiency of the plate body 100. It is understood that the air entering the second airflow channel 140 can be hot air to increase the heating rate of the plate body 100, or it can be cold air, which primarily heats the plate body 100 through the heat generated by the heating element 200. The air only serves to transfer heat, reducing the equipment required to provide hot air and further saving costs.

[0046] like Figure 1 and Figure 2 As shown, in some embodiments, the feeding splint further includes a connecting seat 300, which is arranged at one end of the plate body 100 away from the empty foil area 11 of the pole piece 10, and is used to connect to an external moving device and drive the feeding splint to move under the control of the external moving device.

[0047] The external moving device can be a structure such as a robotic arm, a linear slide system, a cylinder, an electric push rod, etc., and its driving end is connected to the connecting seat 300, which is used to drive the feeding splint to move along a certain route. The connecting seat 300 serves as a connecting structure between the feeding splint and the external moving device, which can effectively transfer the driving force of the external moving device to the feeding splint, while reducing the probability of heat being transferred to the external moving device when the feeding splint heats up, thereby avoiding damage to the external moving device. The connecting seat 300 can be made of materials such as ceramics and plastics, and has high strength and stability, good thermal insulation, and a long service life. Preferably, in this embodiment, connecting holes are provided at both ends of the connecting seat 300 for bolt connection with the external moving device to improve the stability of the connection.

[0048] like Figure 4 and Figure 5 As shown, in some embodiments, a groove 131 is configured on the mounting portion 130 , and a protrusion 310 is configured on the connecting seat 300 corresponding to the groove 131 , and the protrusion 310 is detachably connected to the groove 131 .

[0049] The protrusion 310 and the groove 131 cooperate with each other to achieve position fixation between the connecting seat 300 and the mounting portion 130. The detachable connection method between the protrusion 310 and the groove 131 can be a snap connection, a pin connection, a magnetic connection, etc. For example, the protrusion 310 is made of an iron material, and a magnetic component is set in the groove 131. The protrusion 310 and the groove 131 are fixed by the attraction between the magnetic component and the iron material. Preferably, the present embodiment adopts a screw connection method, and threaded holes are opened at the positions corresponding to the protrusion 310 and the groove 131. The protrusion 310 and the groove 131 are fixed by the cooperation between the screw and the threaded hole. At this time, the protrusion 310 and the groove 131 also have a certain guiding role, which is convenient for aligning the threaded holes on the protrusion 310 and the groove 131 before tightening the thread. Preferably, the connecting seat 300 includes a second plane 320 located at the same horizontal plane as the first plane 110, so that the connecting seat 300 can also be used to clamp the pole piece 10, so that the pole piece 10 remains flat, the contact area between the feeding clamp and the pole piece 10 is expanded, and the leveling effect of the pole piece 10 is improved.

[0050] In some embodiments, the feeding clamping plate includes a temperature detecting element, which is disposed on the plate body 100 and is used to detect the temperature of the plate body 100 .

[0051] The temperature detecting element can be a thermocouple composed of two different metals. By measuring the voltage difference between the two metals due to temperature changes, the temperature of the plate body 100 can be determined. The temperature detecting element can also be a thermistor, infrared temperature sensor, or other structure, which is not limited by the present invention. Preferably, when using a thermocouple as the temperature detecting element, the thermocouple can be placed in the second air flow channel 140 so that the thermocouple can measure the temperature of the air flowing through the plate body 100, thereby obtaining the temperature of the plate body 100, while reducing the impact of the thermocouple on the normal use of the feeding clamp.

[0052] The present invention further proposes a clamping device comprising two feed clamps. The specific structure of the feed clamps is similar to that of the above-described embodiments. Since the clamping device utilizes all the technical solutions of all the above-described embodiments, it at least has all the technical effects brought about by the technical solutions of the above-described embodiments, and a detailed description thereof will not be repeated here. The first flat surfaces 110 of the two feed clamps are arranged relative to each other to clamp the electrode 10. The two feed clamps simultaneously clamp the electrode 10 and transfer heat to the electrode 10, thereby increasing the temperature rise rate of the electrode 10 and accelerating the release of stress.

[0053] The above description is only part or preferred embodiments of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. A feeding clamp for clamping a pole piece, characterized in that: The feeding clamping plate includes a plate body, the plate body includes a first plane, and the first plane is used to abut the pole piece; a first air flow channel for gas to pass through is constructed in the plate body; The feeding clamping plate further includes a heating element, at least part of which is arranged on the plate body; An installation portion is configured at one end of the plate away from the empty foil area of ​​the electrode. The thickness of the installation portion is greater than the thickness of the plate. The heating element is disposed in the installation portion.

2. The feeding splint according to claim 1, characterized in that: The first air flow channel includes an air outlet hole, and the air outlet hole is arranged at one end of the plate body close to the empty foil area of ​​the pole piece.

3. The feeding splint according to claim 1, characterized in that: There are a plurality of first air flow channels, and the plurality of first air flow channels are arranged in parallel at intervals within the plate body along the moving direction of the feeding clamping plate during operation.

4. The feeding splint according to claim 1, characterized in that: A second air flow channel is provided in the mounting portion, the second air flow channel is connected to the first air flow channel, and at least a portion of the heating element is located in the second air flow channel.

5. The feeding splint according to claim 1, characterized in that: The feeding clamp also includes a connecting seat, which is arranged at one end of the plate body away from the empty foil area of ​​the electrode, and is used to connect to an external moving device and drive the feeding clamp to move under the control of the external moving device.

6. The feeding splint according to claim 5, characterized in that: The mounting portion is formed with a groove, the connecting seat is formed with a protrusion corresponding to the groove, and the protrusion is detachably connected to the groove.

7. The feeding splint according to claim 1, characterized in that: The feeding clamping plate includes a temperature detecting component, which is arranged on the plate body and is used to detect the temperature of the plate body.

8. A clamping device, characterized in that: The clamping device comprises two feeding clamps according to any one of claims 1 to 7, and the first planes of the two feeding clamps are arranged opposite to each other to clamp the pole piece.

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