A new type of large size tab hot press molding machine

Abstract

This utility model discloses a novel adhesive-coating and hot-pressing molding machine for large-size tabs, comprising an adhesive-coating and film-coating section and a hot-pressing molding section sequentially connected along the tab processing flow. The adhesive-coating and film-coating section includes a feeding box, a transfer robot, a positioning mechanism, a first lateral movement robot, a feeding telescopic robot, a precision hot-pressing mechanism, two sets of feeding motors, an adhesive pulling mechanism, and an adhesive guide groove. The hot-pressing molding section includes a sheet arrangement mechanism, a precision hot-pressing bubble removal mechanism, a first internal heating molding mechanism, a second internal heating molding mechanism, a second lateral movement robot, and a transition mechanism. It can accurately seal the leakage blind zone on the side end of the tab in the width direction, significantly improving product yield. It further strengthens the bonding strength between the tab adhesive and the tab sheet, significantly improving the fast-charging capability, safety, and cycle life of soft-pack batteries, meeting the requirements for long cell life and high capacity.

Description

Technical Field

[0001] This utility model relates to the field of hot pressing equipment technology, specifically a new type of hot pressing machine for attaching large-size tabs. Background Technology

[0002] Adhesive bonding and thermoforming of the tabs are key processes in battery production. The quality of the tabs directly determines the reliability of the cell packaging. As the demand for longer lifespan and higher capacity in battery cells increases, the bonding strength requirements between the tab adhesive and the tab sheet also increase significantly. Existing thermoforming equipment for tabs has obvious defects: during the thermoforming process, air bubbles are easily generated in the bonding area between the two ends of the tab sheet and the tab adhesive in the width direction, forming leakage channels and resulting in low product yield. When processing large-size tabs, the positioning mechanism of existing equipment is not accurate enough, and the adhesive film is prone to deviation, making it difficult to ensure the bonding accuracy between the sheet material and the adhesive film. In addition, the existing air bubble removal structure lacks stable guidance and sufficient pressure, resulting in incomplete air bubble removal. At the same time, the bonding strength improvement mechanism is imperfect and cannot meet the requirements of high reliability. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides a new type of large-size electrode tab adhesive hot pressing molding machine, which can effectively solve the problems mentioned in the background technology.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A novel large-size electrode tab adhesive hot pressing molding machine includes an adhesive application and film application section and a hot pressing molding section connected sequentially along the electrode tab processing flow.

[0006] The adhesive and film application section includes a feeding box, a transfer robot, a positioning mechanism, a first lateral transfer robot, a feeding telescopic robot, a precision hot pressing mechanism, two sets of feeding motors, an adhesive pulling mechanism, and an adhesive guide groove. The feeding box is used to store sheet-shaped tab materials. The transfer robot transports the sheet-shaped materials in the feeding box to the positioning mechanism for positioning. The first lateral transfer robot moves the positioned sheet-shaped materials to the feeding telescopic robot for heating and fixing. The feeding telescopic robot delivers the sheet-shaped materials to the precision hot pressing mechanism. The two sets of feeding motors supply the upper and lower tab adhesive and the upper and lower PET films respectively. The adhesive guide groove of the adhesive pulling mechanism pulls the adhesive film to the precision hot pressing mechanism, and the precision hot pressing mechanism bonds the sheet-shaped materials to the adhesive film.

[0007] The hot pressing molding section includes a sheet arrangement mechanism, a precision hot pressing bubble removal mechanism, a first internal heating molding mechanism, a second internal heating molding mechanism, a second transverse moving robot, and a transition mechanism. The sheet arrangement mechanism preheats the bonded sheet material. The second transverse moving robot sequentially transfers the preheated material to the precision hot pressing bubble removal mechanism to remove bubbles, the first internal heating molding mechanism to seal leakage channels, the second internal heating molding mechanism to enhance bonding strength, and finally, the transition mechanism completes the processing.

[0008] As a further description of the above technical solution, the precision hot-press bubble removal mechanism includes an upper pressure component, a lower pressure component, and a plurality of precision hexagonal guide posts, which are respectively connected to the upper pressure component and the lower pressure component.

[0009] As a further description of the above technical solution, the preheating temperature of the sheet arrangement mechanism is 95-105℃. After the sheet tab material is preheated, it is transferred by the second transverse manipulator to the precision hot-press bubble removal mechanism.

[0010] As a further description of the above technical solution, both the first internal heating forming mechanism and the second internal heating forming mechanism include two sets of side end caps and one middle end cap; the two sets of side end caps are symmetrically distributed on both sides of the middle end cap and are used to heat the electrode tab metal strip; the middle end cap is used to press the electrode tab adhesive part, and the hot pressing temperature of the second internal heating forming mechanism is higher than that of the first internal heating forming mechanism.

[0011] As a further description of the above technical solution, the adhesive guide groove includes an upper adhesive guide groove and a lower adhesive guide groove; the upper adhesive guide groove is correspondingly connected to a feeding motor that supplies the upper tab adhesive and the upper PET film, and the lower adhesive guide groove is correspondingly connected to a feeding motor that supplies the lower tab adhesive and the lower PET film, and the discharge ends of both are aligned with the precision hot pressing mechanism.

[0012] As a further description of the above technical solution, the positioning mechanism includes a positioning platform and at least two positioning pins, the positioning pins being symmetrically arranged on the edge of the positioning platform, and the surface of the positioning platform being provided with vacuum adsorption holes for fixing sheet materials.

[0013] As a further description of the above technical solution, the gripping surface of the feeding telescopic robot is provided with an electric heating element.

[0014] As a further description of the above technical solution, the discharge end of the transition mechanism is provided with a receiving box, and the infeed side of the receiving box is provided with a picking robot for transferring the finished electrode tabs to the receiving box.

[0015] As a further description of the above technical solution, both the first and second transverse manipulators include a transverse guide rail, a sliding seat, and a clamping assembly. The sliding seat is slidably connected to the transverse guide rail, and the clamping assembly is fixed to the lower end of the sliding seat. The clamping assembly is a pneumatic gripper or a vacuum suction cup.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model discloses a novel large-size electrode tab adhesive hot press molding machine, which has at least one of the following beneficial effects during use:

[0018] The system utilizes a precision hot-press bubble-removing mechanism with hexagonal guide pillars and a clamping structure, combined with a preheating mechanism at 95-105℃, to thoroughly remove air bubbles between the tab adhesive and the PET film. The first internal heating and forming mechanism, with its side-sealed heating metal strip and central-sealed pressing of the tab adhesive, precisely seals leakage blind spots on the sides of the tabs, significantly improving product yield. The second internal heating and forming mechanism, with its higher hot-pressing temperature, further strengthens the adhesion between the tab adhesive and the tab sheet, significantly improving the fast-charging capability, safety, and cycle life of the soft-pack battery, meeting the requirements for long cell life and high capacity. The positioning mechanism's positioning pins, vacuum adsorption, and upper and lower adhesive guide groove alignment design ensure the processing precision of large-size tabs. Seamless integration of each stage via robotic arms enables fully automated production from feeding to receiving, reducing manual intervention and improving efficiency, providing reliable technical support for the mass production of large-size power tabs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a novel large-size electrode tab adhesive hot press molding machine according to the present invention;

[0020] Figure 2 This is a schematic diagram of the adhesive application and film application section of a novel large-size electrode tab adhesive hot press molding machine according to this utility model;

[0021] Figure 3 This is a schematic diagram of the precision hot pressing mechanism of a novel large-size electrode tab adhesive hot pressing molding machine according to the present invention.

[0022] Figure 4 This is a schematic diagram of the hot pressing section structure of a novel large-size electrode tab hot pressing machine according to the present invention;

[0023] Figure 5 This is a schematic diagram of the precision hot pressing air bubble removal mechanism of a novel large-size electrode tab adhesive hot pressing molding machine according to this utility model.

[0024] Numbering on the map:

[0025] 1. Adhesive / film application section; 101. Feeding box; 102. Transfer robot; 103. Positioning mechanism; 104. Feeding telescopic robot; 105. Unloading motor; 106. Precision hot pressing mechanism; 107. First lateral movement robot; 108. Adhesive pulling mechanism; 109. Adhesive guide groove; 110. Sliding seat; 111. Lateral guide rail; 112. Clamping assembly; 2. Hot pressing molding section; 201. Sheet arrangement mechanism; 202. Second lateral movement robot; 203. Precision hot pressing bubble removal mechanism; 204. First internal heating molding mechanism; 205. Second internal heating molding mechanism; 206. Transition mechanism; 207. Upper pressure assembly; 208. Lower pressure assembly; 209. Precision hexagonal guide post; 210. Receiving box. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figure 1-5 As shown, this utility model provides a novel large-size electrode tab adhesive hot press molding machine, including an adhesive application and film application section 1 and a hot press molding section 2 connected sequentially along the electrode tab processing flow.

[0028] The adhesive and film application section 1 includes a loading box 101, a transfer robot 102, a positioning mechanism 103, a first lateral transfer robot 107, a feeding telescopic robot 104, a precision hot pressing mechanism 106, two sets of unloading motors 105, an adhesive pulling mechanism 108, and an adhesive guide groove 109. The loading box is used to store sheet-shaped tab materials. The transfer robot 102 transfers the sheet-shaped materials in the loading box 101 to the positioning mechanism 103 for positioning. The first lateral transfer robot 107 moves the positioned sheet-shaped materials to the feeding telescopic robot 104 for heating and fixing. The feeding telescopic robot 104 sends the sheet-shaped materials to the precision hot pressing mechanism 106. The two sets of unloading motors 105 supply the upper and lower tab adhesive and the upper and lower PET films respectively. The adhesive guide groove 109 of the adhesive pulling mechanism 108 pulls the adhesive film to the precision hot pressing mechanism 106, and the precision hot pressing mechanism 106 bonds the sheet-shaped materials to the adhesive film.

[0029] In this embodiment, the sheet material is fed into the feeding box 101, and the transfer robot 102 transfers the sheet material to the positioning mechanism 103 for positioning. The lateral robot then transfers the positioned sheet material to the feeding telescopic robot 104 for heating and fixing. The feeding telescopic robot 104 transfers the heated sheet material to the precision hot pressing mechanism 106 (preparing the middle position of the electrode tab attaching and PET film attaching mechanism).

[0030] On the other side, the upper and lower tab adhesives and the upper and lower PET films are fed by the feeding motor 105. The adhesive pulling mechanism 108 guides the adhesive and film to the hot pressing station design position simultaneously through the adhesive guide groove 109. The hot pressing mechanism, which is ready to apply adhesive and film, prepares the adhesive tape, PET film and sheet material. After a certain period of time, the materials are bonded together according to the required size. The telescopic robot arm returns the product with adhesive and film to the feeding position. The lateral movement mechanism, in conjunction with the manual, sucks out the product with adhesive to the next positioning station while sucking in the positioned sheet material to the telescopic mechanism.

[0031] The hot pressing molding section 2 includes a sheet arrangement mechanism 201, a precision hot pressing bubble removal mechanism 203, a first internal heating molding mechanism 204, a second internal heating molding mechanism 205, a second transverse moving robot 202, and a transition mechanism 206. The sheet arrangement mechanism 201 preheats the bonded sheet material. The second transverse moving robot 202 sequentially transfers the preheated material to the precision hot pressing bubble removal mechanism 203 to remove bubbles, the first internal heating molding mechanism 204 to seal leakage channels, the second internal heating molding mechanism 205 to enhance bonding strength, and finally, the transition mechanism 206 completes the processing.

[0032] In this embodiment, the hot pressing forming section 2 is connected to the adhesive and film application section 1. The traversing robot in the adhesive application section transfers the positioned sheet material to the sheet arrangement mechanism 201 for preheating. The traversing robot in the hot pressing section transfers the preheated adhesive and film-applied power tabs to the precision hot pressing mechanism to remove air bubbles. The precision hot pressing mechanism has precision hexagonal guide pillars on both the upper and lower structures, and the upper and lower heating copper blocks have extremely high flatness. Because the material is heated, it can completely remove air bubbles from the adhesive and PET film on the tabs.

[0033] The working principle of the bubble degassing mechanism is as follows: the metal plate of the power electrode must be heated to around 100 degrees Celsius before entering the mechanism. Hexagonal guide posts are used to ensure the flatness of the mechanism and prevent displacement during pressure application. The upper pressure counter-pressure system employs a clamping structure, increasing the pressure output for bubble degassing.

[0034] The lateral moving robot transfers the bubble-removed power tab to the first internal heating and forming mechanism 204 for hot pressing. The operation of the first internal heating and hot pressing mechanism is as follows: the two side end caps heat the metal strip, and the middle end cap presses the tab adhesive part. The main function of this mechanism is to solve the problem that bubbles are easily generated in the two side ends and the adhesive bonding area of ​​the tab in the width direction, which can easily form a blind spot for leakage channels. Therefore, the internal heating and pressing mechanism completely blocks this channel through hot pressing.

[0035] The traversing robot transfers the power electrode tabs from the first internal heating and forming mechanism 204 to the second internal heating and hot pressing forming mechanism for high-temperature hot pressing. The second internal heating and hot pressing forming mechanism heats the metal strip at both ends and presses the electrode tab adhesive at the middle end. The main function of this mechanism is to increase the bonding strength and performance between the electrode tab adhesive and the electrode tab sheet. The traversing robot transfers the power electrode tabs from the second internal heating and forming mechanism 205 to the transition mechanism 206, and the last set of mechanisms picks up the power electrode tabs and places them into the receiving box 210.

[0036] Furthermore, the precision hot-press bubble removal mechanism 203 includes an upper pressure component 207, a lower pressure component 208, and a plurality of precision hexagonal guide posts 209, which are respectively connected to the upper pressure component 207 and the lower pressure component 208.

[0037] The first transverse manipulator 107 transfers the positioned sheet material to the feeding telescopic manipulator 104. The clamping surface of the feeding telescopic manipulator 104 preheats the sheet material through an electric heating plate (softening the material surface to facilitate subsequent bonding) and clamps and fixes the material to prevent displacement during the transfer process.

[0038] The first internal heating and forming mechanism 204 specifically heat-presses the bonding areas on both sides of the tab width direction, sealing the leakage channels that are easily formed in traditional processes. This addresses the risk of leakage caused by air bubbles at the source, significantly improving product yield. The second internal heating and forming mechanism 205 heats the metal strip and presses the tab adhesive with the side end cap at a higher temperature, promoting molecular diffusion and bonding between the tab adhesive and the tab sheet. This greatly improves the bonding strength between the two, meeting the requirements for long life and high capacity of the battery cell.

[0039] Furthermore, the preheating temperature of the sheet arrangement mechanism 201 is 95-105℃. After preheating, the sheet tab material is transferred by the second transverse manipulator 202 to the precision hot press bubble removal mechanism 203.

[0040] The first lateral moving robot 107 transfers the sheet material after adhesive and film application to the sheet stacking mechanism 201, which preheats the material to 95-105℃ (heating the tab metal sheets to provide a temperature basis for subsequent bubble removal). The second lateral moving robot 202 transfers the preheated material to the precision hot-press bubble removal mechanism 203. This mechanism uses symmetrically arranged precision hexagonal guide pillars 209 to ensure the flatness of the upper pressing component 207 and the lower pressing component 208, preventing displacement during pressing. At the same time, the clamping structure of the upper pressing component 207 increases the output pressure, and combined with the residual heat of the material itself, completely removes the bubbles between the tab adhesive and the PET film.

[0041] Furthermore, both the first internal heating forming mechanism 204 and the second internal heating forming mechanism 205 include two sets of side end caps and one middle end cap; the two sets of side end caps are symmetrically distributed on both sides of the middle end cap and are used to heat the electrode tab metal strip; the middle end cap is used to press the electrode tab adhesive part, and the hot pressing temperature of the second internal heating forming mechanism 205 is higher than that of the first internal heating forming mechanism 204.

[0042] The second transverse manipulator 202 transfers the bubble-removing material to the first internal heating and forming mechanism 204; the two sets of side caps of this mechanism heat the tab metal strip, and the middle cap presses the tab adhesive part, specifically solving the bubble problem in the bonding area between the two ends of the tab width direction and the tab adhesive, and sealing potential leakage channels.

[0043] Furthermore, the adhesive guide groove 109 includes an upper adhesive guide groove 109 and a lower adhesive guide groove 109; the upper adhesive guide groove 109 is correspondingly connected to a feeding motor 105 that supplies the upper tab adhesive and the upper PET film, and the lower adhesive guide groove 109 is correspondingly connected to a feeding motor 105 that supplies the lower tab adhesive and the lower PET film, and the discharge ends of both are aligned with the precision hot pressing mechanism 106.

[0044] Two sets of feeding motors 105 synchronously supply upper / lower tab adhesive and upper / lower PET film respectively; the adhesive pulling mechanism 108 pulls the upper adhesive film (upper tab adhesive + upper PET film) and the lower adhesive film (lower tab adhesive + lower PET film) respectively through the upper adhesive guide groove 109 and the lower adhesive guide groove 109, ensuring that the adhesive film is accurately delivered to the adhesive film feeding side of the precision hot pressing mechanism 106 along the preset path and aligned with the upper and lower surfaces of the sheet material.

[0045] Furthermore, the positioning mechanism 103 includes a positioning platform and at least two positioning pins. The positioning pins are symmetrically arranged on the edge of the positioning platform, and the surface of the positioning platform is provided with vacuum adsorption holes for fixing sheet materials.

[0046] The material box stores sheet-shaped electrode material (electrode sheet). The transfer robot 102 picks up the sheet-shaped material from the material box and transfers it to the positioning mechanism 103. The positioning mechanism 103 limits the position of the material by positioning pins symmetrically arranged on the edge, and uses the vacuum adsorption holes on the surface of the positioning table to adsorb and fix the material, ensuring the positioning accuracy of the sheet-shaped material.

[0047] Furthermore, the clamping surface of the feeding telescopic robot 104 is equipped with an electric heating element.

[0048] The feeding telescopic robot 104 pushes the preheated sheet material to the precision hot pressing mechanism 106. At this time, the adhesive film has been placed in place through the adhesive guide groove 109. The precision hot pressing mechanism 106 applies preset pressure and temperature to the sheet material and the upper and lower adhesive films, and tightly adheres the three to the preset size to complete the initial adhesive application.

[0049] Furthermore, the discharge end of the transition mechanism 206 is provided with a receiving box 210, and the infeed side of the receiving box 210 is provided with a picking robot for transferring the finished electrode tabs to the receiving box 210.

[0050] Furthermore, both the first transverse manipulator 107 and the second transverse manipulator 202 include a transverse guide rail 111, a sliding seat 110, and a clamping assembly 112. The sliding seat 110 is slidably connected to the transverse guide rail 111, and the clamping assembly 112 is fixed to the lower end of the sliding seat 110. The clamping assembly 112 is a pneumatic gripper or a vacuum suction cup.

[0051] The second lateral moving robot 202 transfers the final formed tab to the transition mechanism 206. The picking robot then picks up the finished tab from the transition mechanism 206 and places it into the receiving box to complete the entire processing flow. The adhesive application and film application section 1 and the hot pressing and forming section 2 are seamlessly connected through robots and lateral moving mechanisms, realizing a fully automated process from material feeding to finished product receiving, reducing manual intervention and improving production efficiency.

[0052] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A novel adhesive hot-press molding machine for large-size electrode tabs, characterized in that: This includes the adhesive application and film application section and the hot pressing and forming section, which are connected sequentially along the electrode processing flow; The adhesive and film application section includes a feeding box, a transfer robot, a positioning mechanism, a first lateral transfer robot, a feeding telescopic robot, a precision hot pressing mechanism, two sets of feeding motors, an adhesive pulling mechanism, and an adhesive guide groove. The feeding box is used to store sheet-shaped tab materials. The transfer robot transports the sheet-shaped materials in the feeding box to the positioning mechanism for positioning. The first lateral transfer robot moves the positioned sheet-shaped materials to the feeding telescopic robot for heating and fixing. The feeding telescopic robot delivers the sheet-shaped materials to the precision hot pressing mechanism. The two sets of feeding motors supply the upper and lower tab adhesive and the upper and lower PET films respectively. The adhesive guide groove of the adhesive pulling mechanism pulls the adhesive film to the precision hot pressing mechanism, and the precision hot pressing mechanism bonds the sheet-shaped materials to the adhesive film. The hot pressing molding section includes a sheet arrangement mechanism, a precision hot pressing bubble removal mechanism, a first internal heating molding mechanism, a second internal heating molding mechanism, a second transverse moving robot, and a transition mechanism. The sheet arrangement mechanism preheats the bonded sheet material. The second transverse moving robot sequentially transfers the preheated material to the precision hot pressing bubble removal mechanism to remove bubbles, the first internal heating molding mechanism to seal leakage channels, the second internal heating molding mechanism to enhance bonding strength, and finally, the transition mechanism completes the processing.

2. The novel large-size electrode tab adhesive hot pressing molding machine according to claim 1, characterized in that: The precision hot-press bubble removal mechanism includes an upper pressure component, a lower pressure component, and several precision hexagonal guide posts, which are respectively connected to the upper pressure component and the lower pressure component.

3. The novel large-size electrode tab adhesive hot pressing molding machine according to claim 1, characterized in that: The preheating temperature of the sheet arrangement mechanism is 95-105℃. After preheating, the sheet tab material is transferred by the second transverse manipulator to the precision hot-press bubble removal mechanism.

4. The novel large-size tab gluing hot press forming machine according to claim 1, characterized in that: Both the first and second internal heating forming mechanisms include two sets of side end caps and one middle end cap; the two sets of side end caps are symmetrically distributed on both sides of the middle end cap and are used to heat the electrode tab metal strip; the middle end cap is used to press the electrode tab adhesive part, and the hot pressing temperature of the second internal heating forming mechanism is higher than that of the first internal heating forming mechanism.

5. A novel large-size electrode tab adhesive hot press molding machine according to claim 1, characterized in that: The adhesive guide groove includes an upper adhesive guide groove and a lower adhesive guide groove; the upper adhesive guide groove is connected to a feeding motor that supplies the upper tab adhesive and the upper PET film, and the lower adhesive guide groove is connected to a feeding motor that supplies the lower tab adhesive and the lower PET film, and the discharge ends of both are aligned with the precision hot pressing mechanism.

6. The novel large-size tab gluing hot press forming machine according to claim 1, characterized in that: The positioning mechanism includes a positioning platform and at least two positioning pins. The positioning pins are symmetrically arranged on the edge of the positioning platform, and the surface of the positioning platform is provided with vacuum adsorption holes for fixing sheet materials.

7. A novel large-size electrode tab adhesive hot press molding machine according to claim 1, characterized in that: The gripping surface of the feeding telescopic manipulator is equipped with an electric heating element.

8. A novel large-size electrode tab adhesive hot pressing molding machine according to claim 1, characterized in that: The discharge end of the transition mechanism is provided with a receiving box, and the inlet side of the receiving box is provided with a picking robot for transferring the finished electrode tabs to the receiving box.

9. A novel large-size electrode tab adhesive hot press molding machine according to claim 1, characterized in that: Both the first and second transverse manipulators include a transverse guide rail, a sliding base, and a clamping assembly. The sliding base is slidably connected to the transverse guide rail, and the clamping assembly is fixed to the lower end of the sliding base. The clamping assembly is a pneumatic gripper or a vacuum suction cup.

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