A production line for thermal compounding of battery cells

Abstract

The present invention relates to a production line for thermally composited battery cells, comprising a pre-compounding transport assembly, a thermally composited assembly, a post-compounding transport assembly, and a separator assembly. The pre-compounding transport assembly includes a manipulator equipped with a 180° reversible material-removing clamp that transports the product to be thermally composited and the separator assembly to the thermally composited assembly. The post-compounding transport assembly includes a material-removing fixture that is used to remove the separator assembly and the thermally composited product from the thermally composited station of the thermally composited assembly and then transport the product to the next station. The present invention achieves automated continuous production, avoids indentations after thermally composited battery cells, and ensures that the product is transported without deviation before and after thermally composited, thereby improving transportation safety and the qualified rate of finished products.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery production equipment, and in particular to a production line for thermal compounding of battery cells. Background Art

[0002] The lithium battery industry uses a hot composite (hot pressing) process to hot press and shape the battery cells, and heat and bond the diaphragms, positive and negative electrodes between the electrodes to make the battery cells compact and uniform in thickness, thereby improving the qualified rate of core installation and increasing the charge per usable area of ​​the battery cells.

[0003] There are currently many ways to perform thermal lamination of battery cells on the market: the first is to design an avoidance gap on the thermal lamination plate on the thermal lamination machine to enable the clamping claws to clamp the product; the second is to block the product so that the clamps can exit the thermal lamination machine to transport the product to the thermal lamination machine; the third is to transport the battery cells to the thermal lamination machine by adsorbing the surface diaphragm; the fourth is to transport the battery cells by cooperating with conveyor belts.

[0004] These structures have the following defects: First, the existence of notches leads to gaps in the thermal composite (hot pressing) plane, causing uneven heating and indentations on the product after thermal composite; second, the product is blocked from being pulled out of the clamping structure, causing the product to be subjected to relative friction and blocking pressure, and during and after the withdrawal, the product falls on the thermal composite plane, causing relative displacement and external force on the product; third, the surface diaphragm is adsorbed, causing the diaphragm to deform and wrinkle, and the interior of the battery cell is damaged due to relative friction due to uneven force; fourth, the start and stop of the conveyor belt affects the alignment of the battery cell, and the gap at the joint between the conveyor belts causes the battery cell to sag and collide with the machine. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a production line for thermal composite of battery cells, which can effectively solve the deviation of battery cells caused by the above-mentioned problems during transportation, and the upper and lower pressure surfaces of the thermal composite are flat, and there are no gaps or other problems that will cause indentations; it realizes automated continuous production, avoids indentations after thermal composite of battery cells, and there is no deviation in product transportation before and after thermal composite, thereby improving the safety of transportation and the qualified rate of finished products.

[0006] The object of the present invention is achieved like this:

[0007] A production line for thermal composite of battery cells, comprising a pre-thermal composite transport component, a thermal composite component, a post-thermal composite transport component and an isolation film component. The pre-thermal composite transport component comprises a manipulator provided with a material-picking clamp that can be flipped 180°, and the material-picking clamp transports the product to be thermally composited and the isolation film component to the thermal composite component. The post-thermal composite transport component comprises a material-picking fixture, and the material-picking fixture is used to clamp the isolation film component and the thermally composited product from the thermal composite station of the thermal composite component, and the material-picking fixture transports the product to the next station.

[0008] Preferably, the isolation membrane assembly includes a first isolation membrane and an isolation membrane clamping plate, and the two isolation membrane clamping plates clamp the two ends of the first isolation membrane.

[0009] Preferably, the thermal composite component includes an upper pressure surface, a lower pressure surface and a clamping cylinder group, the upper pressure surface and the lower pressure surface cooperate with each other, the clamping cylinder group is arranged on both sides of the upper and lower pressure surfaces, the upper pressure surface is fixed with a second isolation membrane, the isolation membrane assembly is arranged above the lower pressure surface, the clamping cylinder group includes an upper clamping cylinder and a lower clamping cylinder, and the isolation membrane splint of the isolation membrane assembly is clamped up and down by the upper clamping cylinder and the lower clamping cylinder.

[0010] Preferably, the material picking clamp includes a connecting seat, and the two ends of the connecting seat are respectively provided with a first clamp for clamping the isolation membrane clamp, and the middle of the connecting seat is provided with a second clamp, and a single clamp on one side of the upper and lower sides of the second clamp is connected to a clamp assembly, and the second clamp clamps the first isolation membrane and the product to be heat-compounded through the clamp assembly symmetrically arranged above and below.

[0011] Preferably, the clip assembly includes a connecting plate and a first clip, the connecting plate connects the single jaws on the upper and lower sides of the second clamp, and the connecting plate connects multiple first clips, and the multiple first clips are evenly spaced.

[0012] Preferably, the material picking fixture includes a base plate, a third linear module, a fourth linear module, a third clamp, a fourth clamp, a lifting cylinder and a tensioning cylinder. The base plate is connected to the slide of the second linear module. The third linear module is symmetrically arranged at both ends of the base plate, and the fourth linear module is arranged in the middle of the base plate.

[0013] Preferably, the third linear module is fixed on the second mounting plate, a linear slide rail is provided on the base plate, and a slide groove is provided on the second mounting plate corresponding to the linear slide rail. The moving direction of the linear slide rail is consistent with that of the tensioning cylinder. The tensioning cylinder is fixed on the base plate, and the tensioning cylinder is located on the inner side of the second mounting plate. The telescopic rod of the tensioning cylinder is connected to the second mounting plate.

[0014] Preferably, the slide of the third linear module is provided with a third clamp, and the third clamp clamps the isolation membrane clamp of the isolation membrane assembly. The slide of the fourth linear module is connected to the lifting cylinder, and the telescopic rod of the lifting cylinder is connected to the fourth clamp, and the fourth clamp clamps the first isolation membrane and the heat-compounded product on the first isolation membrane.

[0015] Preferably, the single jaw of the fourth clamp is connected to the second clamp, and the first isolation film and the middle part of the heat-combined product on the first isolation film are clamped up and down by the second clamp.

[0016] Preferably, a first clamping point A, a second clamping point B and a third clamping point C are provided on the isolation membrane clamping plate.

[0017] The beneficial effects of the present invention are:

[0018] The present invention can effectively solve the problem of deviation of battery cells caused by various problems during transportation. An isolation film assembly is used as a transportation tool for the product. The upper and lower pressure surfaces of the thermal composite are flat, and there are no gaps or other problems that may cause indentations. Automated continuous production is achieved, indentations are avoided after thermal composite of the battery cells, and there is no deviation in product transportation before and after thermal composite, thereby improving transportation safety and the qualified rate of finished products. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 Schematic diagram of the structure of the transport component before thermal bonding.

[0021] Figure 3 This is a schematic diagram of the structure of the material gripper gripping the product.

[0022] Figure 4 This is a structural diagram of the material removal gripper without flipping (the product is below the first isolation membrane at this time).

[0023] Figure 5 This is a structural diagram of the material removal gripper being flipped 180° (the product is now above the first isolation membrane).

[0024] Figure 6 Schematic diagram of the structure of the thermal composite component.

[0025] Figure 7 Schematic diagram of the structure of the transportation component after thermal compounding.

[0026] Figure 8 This is a structural diagram of the material removal fixture being transported to the next workstation.

[0027] Figure 9 for Figure 7 Schematic diagram of the structure of the picking fixture.

[0028] Figure 10 for Figure 8 Schematic diagram of the structure of the picking fixture.

[0029] Figure 11 Schematic diagram of the structure of the isolation membrane assembly.

[0030] Wherein: thermal composite component 1; upper pressing surface 1.1; lower pressing surface 1.2; upper pressing cylinder 1.3; lower pressing cylinder 1.4; second isolation membrane 1.5;

[0031] Retrieving jaw 2; connecting base 2.1; first jaw 2.2; second jaw 2.3; clip assembly 2.4; connecting plate 2.4.1; first clip 2.4.2;

[0032] Loading platform 3; isolation membrane assembly 4; first isolation membrane 4.1; isolation membrane clamp 4.2; product 5; first linear module 6; material removal fixture 7; second linear module 8;

[0033] Retrieving fixture 7; base plate 7.1; third linear module 7.2; fourth linear module 7.3; third clamping jaw 7.4; fourth clamping jaw 7.5; lifting cylinder 7.6; tensioning cylinder 7.7; linear guide rail 7.8; first mounting plate 7.9; second mounting plate 7.10; slide chute 7.11; second clamping piece 7.12. DETAILED DESCRIPTION

[0034] See also Figure 1-11 The present invention relates to a production line for thermal composite of battery cells, comprising a pre-thermal composite transport component, a thermal composite component 1, a post-thermal composite transport component and an isolation film component 4. The pre-thermal composite transport component and the post-thermal composite transport component are located on both sides or the same side of the thermal composite component 1. The pre-thermal composite transport component comprises a manipulator and a loading platform 3. The manipulator is provided with a material-retrieving clamp 2. The loading platform 3 is used to place a product 5 to be thermally composited. The loading platform 3 is transported from the previous workstation by a first linear module 6. The material-retrieving clamp 2 transports the product 5 to be thermally composited and the isolation film component 4 to the thermal composite component 1.

[0035] The post-heat-compounding transport assembly includes a material-taking fixture 7 and a second linear module 8. The material-taking fixture 7 is used to take the isolation film assembly 4 and the heat-compounded product 5 from the heat-compounding station of the heat-compounding assembly 1. The material-taking fixture 7 is transported to the next station by the second linear module 8.

[0036] The isolation membrane assembly 4 includes a first isolation membrane 4.1 and an isolation membrane clamping plate 4.2. The two isolation membrane clamping plates 4.2 clamp the two ends of the first isolation membrane.

[0037] The thermal composite component 1 includes an upper pressure surface 1.1, a lower pressure surface 1.2 and a pressing cylinder group. The upper pressure surface 1.1 and the lower pressure surface 1.2 cooperate with each other. The pressing cylinder group is arranged on both sides of the upper and lower pressure surfaces 1.1 and 1.2. The upper pressure surface 1.1 is fixed with a second isolation membrane 1.5. The isolation membrane assembly 4 is arranged above the lower pressure surface 1.2. The pressing cylinder group includes an upper pressing cylinder 1.3 and a lower pressing cylinder 1.4. The isolation membrane clamp 4.2 of the isolation membrane assembly 4 is pressed up and down by the upper pressing cylinder 1.3 and the lower pressing cylinder 1.4.

[0038] The material picking clamp 2 includes a connecting seat 2.1, and both ends of the connecting seat 2.1 are respectively provided with a first clamping jaw 2.2 for clamping the isolation membrane clamping plate 4.2, and a second clamping jaw 2.3 is provided in the middle of the connecting seat 2.1, and a single clamping jaw on one side of the upper and lower sides of the second clamping jaw 2.3 is connected to a clip assembly 2.4, and the second clamping jaw 2.3 simultaneously clamps the first isolation membrane 4.1 and the product 5 to be heat-compounded through the clip assemblies 2.4 symmetrically arranged above and below, and the second clamping jaw 2.3 fixes the product to prevent the material picking clamp 2 from falling during the product transportation and flipping 180°. The clip assembly 2.4 includes a connecting plate 2.4.1 and a first clamping piece 2.4.2, and the connecting plate 2.4.1 connects the single clamping pieces on the same side of the upper and lower sides of the second clamping jaw 2.3, and the connecting plate 2.4.1 connects multiple first clamping pieces 2.4.2, and the multiple first clamping pieces 2.4.2 are evenly spaced. The first clamping piece 2.4.2 prevents the product 5 from being positionally shifted during the flipping process of the material picking clamp.

[0039] The material picking fixture 7 includes a base plate 7.1, a third linear module 7.2, a fourth linear module 7.3, a third clamping jaw 7.4, a fourth clamping jaw 7.5, a lifting cylinder 7.6 and a tensioning cylinder 7.7. The base plate 7.1 is connected to the slide of the second linear module 8. The third linear module 7.2 is symmetrically arranged at both ends of the base plate 7.1. The fourth linear module 7.3 is fixed in the middle of the base plate 7.1 through the first mounting plate 7.9. The fourth linear module 7.3 is parallel to the third linear module 7.2. The third linear module 7.2 is fixed on the second mounting plate 7.10. A linear slide rail 7.8 is provided on the base plate 7.1. The second mounting plate 7.10 is provided with a slide groove 7.11 corresponding to the linear slide rail 7.8. The slide of the third linear module 7.2 is provided with a third clamping jaw 7.4. The third clamping jaw 7.4 clamps the isolation diaphragm assembly 4. The membrane-separating clamping plate 4.2, the sliding seat of the fourth linear module 7.3 is connected to the lifting cylinder 7.6, the telescopic rod of the lifting cylinder 7.6 is connected to the fourth clamping jaw 7.5, the fourth clamping jaw 7.5 clamps the first isolation membrane 4.1 and the heat-compounded product 5 on the first isolation membrane 4.1, the single jaw of the fourth clamping jaw 7.5 is connected to the second clamping piece 7.12, and the first isolation membrane 4.1 and the middle part of the heat-compounded product 5 on the first isolation membrane 4.1 are clamped up and down by the second clamping piece 7.12, the tensioning cylinder 7.7 is fixed on the base plate 7.1, the tensioning cylinder 7.7 is located on the inner side of the second mounting plate 7.10, the telescopic rod of the tensioning cylinder 7.7 is connected to the second mounting plate 7.10, and the distance between the two third clamping jaws 7.4 is adjusted by the telescopic rod of the tensioning cylinder 7.7, thereby controlling the tightness of the first isolation membrane 4.1.

[0040] The isolation membrane clamping plate 4.2 is provided with a first clamping point A, a second clamping point B and a third clamping point C.

[0041] When the pre-heat bonding transport assembly and the post-heat bonding transport assembly are located on either side of the heat bonding assembly 1, the first clamping jaw 2.2 of the pick-up clamp 2 clamps at the first clamping point A, the pressing cylinder group clamps at the second clamping point B, and the third clamping jaw 7.4 of the pick-up fixture 7 clamps at the third clamping point C. The clamping sequence for the isolation film clamp is as follows: initial state, the pressing cylinder group clamps at the second clamping point B → pick-up and loading state, the pick-up clamp 2 clamps at the first clamping point A → heat bonding state, the pressing cylinder group clamps at the second clamping point B → after heat bonding, the pick-up fixture clamps at the third clamping point C → return to the initial state, the pressing cylinder group clamps at the second clamping point B.

[0042] When the pre-heat bonding transport assembly and the post-heat bonding transport assembly are on the same side of the heat bonding assembly 1, the first clamping jaw 2.2 of the material removal clamp 2 clamps at the first clamping point A, the pressing cylinder group clamps at the second clamping point B, and the third clamping jaw 7.4 of the material removal clamp 7 clamps at the first clamping point A. The clamping sequence of the isolation film clamp is as follows: initial state, the pressing cylinder group clamps at the second clamping point B → material removal and loading state, the material removal clamp 2 clamps at the first clamping point A → heat bonding state, the pressing cylinder group clamps at the second clamping point B → after heat bonding, the material removal clamp clamps at the first clamping point A → return to the initial state, the pressing cylinder group clamps at the second clamping point B.

[0043] A production process for thermal compounding of battery cells:

[0044] The following steps are involved:

[0045] S1. The first clamping jaw of the material picking clamping jaw 2 clamps the isolation film assembly from the thermal composite assembly 1, and places the isolation film assembly on the product 5 to be thermally composited. The second clamping jaw clamps the first isolation film and the product 5 to be thermally composited below the first isolation film. If the isolation film clamping plate is single-sided (the clamping point is on one side), the material picking clamping jaw 2 needs to be turned 180° after clamping the isolation film assembly and then placed on the product 5 to ensure that the first clamping jaw of the material picking clamp corresponds to the clamping point. If the isolation film clamping plate is double-sided (the clamping points are on both sides), the material picking clamping jaw does not need to be turned 180° in this step.

[0046] S2, after the material taking jaws exit the material taking position, the material taking jaws rotate 180 degrees, and the product to be heat-laminated is above the first isolation film;

[0047] S3, the material removal gripper conveys the first isolation film and the product 5 on the first isolation film to the thermal bonding station of the thermal bonding assembly, the compression cylinder group clamps the isolation film clamping plate, and the material removal gripper returns to its original position. At this time, the product 5 is located between the first isolation film and the second isolation film, and the thermal bonding assembly performs thermal bonding on the product;

[0048] S4. After thermal lamination, the material picking fixture 7 of the post-thermal lamination transport assembly goes to the thermal lamination station. The third clamping jaw clamps the isolation film clamping plate, and the fourth clamping jaw clamps the product and the first isolation film, and transports the product 5 to the next station. When the material picking fixture 7 arrives at the next station, the lifting cylinder extends, and the fourth clamping jaw drives the product and the middle part of the first isolation film upward. The tensioning cylinder contracts accordingly, and the first isolation film is in a loose state. A gap is created between the two ends of the product and the two ends of the first isolation film. The fixture of the next station directly clamps the two ends of the product 5; after the product 5 is removed, the lifting cylinder returns to its original position, the fourth clamping jaw is released, and the tensioning cylinder extends. The first isolation film is in a taut state, and the taut first isolation film is transported to the thermal lamination assembly and compressed by the compression cylinder group, waiting for the next clamping of the material picking fixture.

[0049] In addition to the above embodiments, the present invention also includes other implementation methods. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of protection of the claims of the present invention.

Claims

1. A production line for thermal compounding of battery cells, characterized by: The invention comprises a pre-heat-compounding transport component, a heat-compounding component (1), a post-heat-compounding transport component and an isolation film component (4), wherein the pre-heat-compounding transport component comprises a manipulator, wherein the manipulator is provided with a material-picking clamp (2) that can be turned 180 degrees, and the material-picking clamp (2) transports the product (5) to be heat-compounded and the isolation film component (4) to the heat-compounding component (1), and the post-heat-compounding transport component comprises a material-picking clamp (7), wherein the material-picking clamp (7) is used to pick up the isolation film component (4) and the heat-compounded product (5) from the heat-compounding station of the heat-compounding component (1), and the material-picking clamp (7) transports the product to the next station; The isolation membrane assembly (4) comprises a first isolation membrane (4.1) and an isolation membrane clamping plate (4.2), wherein the two isolation membrane clamping plates (4.2) clamp the two ends of the first isolation membrane; The isolation membrane clamping plate (4.2) is provided with a first clamping point A, a second clamping point B and a third clamping point C; The first clamping jaw of the material picking clamping jaw (2) clamps the isolation film assembly from the thermal composite assembly (1) and places the isolation film assembly above the product (5) to be thermally composited. The second clamping jaw clamps the first isolation film and the product (5) to be thermally composited below the first isolation film. After the material picking clamping jaw exits the material picking position, the material picking clamping jaw rotates 180 degrees, and the product to be thermally composited is located above the first isolation film. The material picking clamping jaw transports the first isolation film and the product (5) on the first isolation film to the thermal composite station of the thermal composite assembly.

2. The production line for thermal compounding of battery cells according to claim 1, characterized in that: The thermal composite component (1) comprises an upper pressing surface (1.1), a lower pressing surface (1.2) and a pressing cylinder group, wherein the upper pressing surface (1.1) and the lower pressing surface (1.2) cooperate with each other, and the pressing cylinder group is arranged on the upper and lower pressing surfaces ( 1.1, 1.2), the upper pressure surface (1.1) is fixedly provided with a second isolation diaphragm (1.5), the isolation diaphragm assembly (4) is arranged above the lower pressure surface (1.2), the pressing cylinder group comprises an upper pressing cylinder (1.3) and a lower pressing cylinder (1.4), and the isolation diaphragm clamp (4.2) of the isolation diaphragm assembly (4) is pressed up and down by the upper pressing cylinder (1.3) and the lower pressing cylinder (1.4).

3. The production line for thermal compounding of battery cells according to claim 1, characterized in that: The material-removing clamp (2) comprises a connecting seat (2.1), wherein first clamps (2.2) for clamping an isolation membrane clamp (4.2) are respectively provided at both ends of the connecting seat (2.1), and a second clamp (2.3) is provided in the middle of the connecting seat (2.1), and a single clamp on one side of the upper and lower sides of the second clamp (2.3) is connected to a clamp assembly (2.4), and the second clamp (2.3) clamps the first isolation membrane (4.1) and the product (5) to be heat-compounded via the clamp assemblies (2.4) symmetrically arranged above and below.

4. The production line for thermal compounding of battery cells according to claim 3, characterized in that: The clip assembly (2.4) comprises a connecting plate (2.4.1) and a first clip (2.4.2), wherein the connecting plate (2.4.1) connects the single claws on the same side of the upper and lower sides of the second clamp (2.3), and the connecting plate (2.4.1) connects a plurality of first clips (2.4.2), and the plurality of first clips (2.4.2) are evenly spaced.

5. The production line for thermal compounding of battery cells according to claim 1, characterized in that: The material picking fixture (7) comprises a base plate (7.1), a third linear module (7.2), a fourth linear module (7.3), a third clamping jaw (7.4), a fourth clamping jaw (7.5), a lifting cylinder (7.6) and a tensioning cylinder (7.7); the base plate (7.1) is connected to the slide seat of the second linear module (8); the third linear module (7.2) is symmetrically arranged at both ends of the base plate (7.1); and the fourth linear module (7.3) is arranged in the middle of the base plate (7.1).

6. The production line for thermal compounding of battery cells according to claim 5, characterized in that: The third linear module (7.2) is fixed on the second mounting plate (7.10), a linear slide rail (7.8) is provided on the base plate (7.1), and a slide groove (7.11) is provided on the second mounting plate (7.10) corresponding to the linear slide rail (7.8). The linear slide rail (7.8) and the tensioning cylinder (7.7) have the same moving direction. The tensioning cylinder (7.7) is fixed on the base plate (7.1), and the tensioning cylinder (7.7) is located on the inner side of the second mounting plate (7.10). The telescopic rod of the tensioning cylinder (7.7) is connected to the second mounting plate (7.10).

7. The production line for thermal compounding of battery cells according to claim 5, characterized in that: The slide of the third linear module (7.2) is provided with a third clamp (7.4), and the third clamp (7.4) clamps the isolation membrane clamp (4.2) of the isolation membrane assembly (4). The slide of the fourth linear module (7.3) is connected to the lifting cylinder (7.6), and the telescopic rod of the lifting cylinder (7.6) is connected to the fourth clamp (7.5). The fourth clamp (7.5) clamps the first isolation membrane (4.1) and the heat-compounded product (5) on the first isolation membrane (4.1).

8. The production line for thermal compounding of battery cells according to claim 7, characterized in that: The single claw of the fourth clamp (7.5) is connected to the second clamp (7.12), and the first isolation film (4.1) and the middle part of the heat-compounded product (5) on the first isolation film (4.1) are clamped up and down through the second clamp (7.12).

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