Battery module extrusion sleeve steel band or pet band apparatus

Abstract

The utility model belongs to lithium ion battery technical field, concretely relates to a battery module extrusion sleeve steel band or PET band equipment, including module transplanting guide rail, module shaping mechanism, module transplanting extrusion tray, module transplanting extrusion tray is arranged on module transplanting guide rail and is slid, module shaping mechanism sets up in the side of module transplanting guide rail, and is located the mobile path of module transplanting extrusion tray. The equipment is driven end plate pressure block through precision servo motor, and is equipped with high accuracy force sensor and realizes pressure closed loop control, can exert preset pressure to module in length direction, and pressure accuracy reaches ±1%FS, and length direction offset is less than 0.1mm, and the module that is compatible with the module of different thickness, length, width and the cell group is formed, and high accuracy, low failure rate and strong compatibility are considered.

Description

Technical Field

[0001] This utility model belongs to the field of lithium-ion battery technology, specifically relating to a battery module extrusion sleeve steel strip or PET strip equipment. Background Technology

[0002] In the extrusion and bundling processes of battery module production, existing technologies have many shortcomings, as detailed below: The patent with publication number CN202411325595.8 proposes a battery module extrusion system, which only sets extruders on the left and right sides and does not have a clamping mechanism on the top of the terminal post. This cannot eliminate the "horn mouth" phenomenon on the top of the module and has poor stability. At the same time, the module tray of this solution does not have a steel strip pre-embedded groove. The steel strip assembly requires manual real-time alignment, which is difficult to operate and has insufficient safety.

[0003] The patent with publication number CN202421856018.7 proposes a workstation for using steel strips on modules. It separates the side shaping of the module, the clamping of the pole, and the extrusion of the module into different workstations. It does not achieve synchronous extrusion under the three-sided shaping and pressure holding state, which makes the module prone to displacement during the transfer process, and ultimately causes uneven load during extrusion. In addition, it also does not set the steel strip pre-embedded groove, which increases the complexity and error rate of manual operation.

[0004] The patent with publication number CN202420211213.8 proposes a battery module extrusion and bundling auxiliary equipment and production line. This solution does not set up a pressure holding mechanism during the extrusion process, and the module is prone to displacement during extrusion, resulting in uneven stress. At the same time, it has neither a steel strip pre-embedded groove nor is equipped with a through-beam sensor, so it cannot realize the in-situ detection of steel strip and real-time monitoring of the extrusion status of the module, making it difficult to guarantee the bundling accuracy and the quality of subsequent processes.

[0005] The patent with publication number CN202223314105.3 proposes a battery module extrusion tooling, which does not have a through-beam sensor, making it impossible to monitor the side flatness and terminal flatness of the module in real time during the extrusion process. This can easily lead to over-limit issues that affect subsequent welding. Furthermore, it does not maintain pressure on the side of the module during extrusion, which can cause the module to shift and generate uneven loads, affecting the stability of the extrusion effect.

[0006] In addition, existing equipment from other manufacturers generally suffers from problems such as insufficient pressure control accuracy (poor pressure uniformity due to hydraulic cylinder drive, pneumatic pressurization, etc.) and easy scratching of the pole (due to sliding friction causing damage to the coating when using metal pressure plates or ceramic coated pressure blocks).

[0007] In view of the shortcomings of the existing technologies, there is an urgent need for a high-precision, high-reliability, highly compatible and easy-to-operate battery module extrusion sleeve steel belt or PET belt equipment to solve problems such as low pressure control accuracy, electrode damage, inaccurate positioning, complex operation and lack of monitoring. Utility Model Content

[0008] The purpose of this invention is to provide a battery module extrusion sleeve steel or PET belt equipment, which aims to solve problems such as low pressure control accuracy, electrode damage, inaccurate positioning, complex operation and lack of monitoring.

[0009] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a battery module extrusion sleeve steel belt or PET belt equipment, including a module transfer guide rail, a module shaping mechanism, and a module transfer extrusion tray; the module transfer extrusion tray is slidably disposed on the module transfer guide rail, and the module shaping mechanism is disposed on the side of the module transfer guide rail and located on the moving path of the module transfer extrusion tray.

[0010] Preferably, the module shaping mechanism includes a Z-axis pressing cylinder, a side shaping cylinder, a photoelectric sensor, a side shaping die bond, and a pole pressing mechanism; the side shaping cylinders are symmetrically arranged on both sides of the module transfer extrusion tray, and the side shaping die bond is connected to the output end of the side shaping cylinder; the Z-axis pressing cylinder is arranged on the frame of the module shaping mechanism and located above the module transfer extrusion tray, and the pole pressing mechanism is connected to the output end of the Z-axis pressing cylinder; the photoelectric sensor is arranged beside the side shaping cylinder and is used to detect the position of the module transfer extrusion tray.

[0011] Preferably, the pole pressing mechanism includes a rubber-coated roller mounting plate and rubber-coated rollers; the rubber-coated roller mounting plate is connected to the output end of the Z-axis pressing cylinder, and a plurality of rubber-coated rollers are rotatably mounted on the rubber-coated roller mounting plate, and the plurality of rubber-coated rollers are distributed in an array.

[0012] Preferably, the module transfer extrusion tray includes an extrusion servo motor, a module transfer tray, a module extrusion mechanism, and a tray transfer motor; the tray transfer motor is connected to the module transfer tray and drives the module transfer tray to slide on the module transfer guide rail; the module extrusion mechanism is disposed on the module transfer tray, and the extrusion servo motor is connected to the module extrusion mechanism and drives the module extrusion mechanism to operate.

[0013] Preferably, the module extrusion mechanism includes a through-beam sensor, an end plate pressure block, a PET strapping limiting block, a bottom photoelectric sensor, a grooved wooden block, and a diffuse reflection sensor; the end plate pressure block is connected to the output end of the extrusion servo motor; the grooved wooden block is placed on the module transfer tray, and a steel strip pre-embedded groove is opened on it; the PET strapping limiting block is placed beside the grooved wooden block; two sets of through-beam sensors are respectively placed on the side of the module extrusion mechanism, and one set of through-beam sensors is placed on the top of the module extrusion mechanism; the bottom photoelectric sensor is placed on the module transfer tray to detect whether the module is in place; the diffuse reflection sensor is placed beside the grooved wooden block to detect whether the steel strip is in place.

[0014] Preferably, there are two extrusion servo motors, which are symmetrically arranged at both ends of the module transfer tray, and the output ends of both extrusion servo motors are connected to the end plate pressure block.

[0015] Preferably, there are two PET strapping and limiting blocks, which are symmetrically arranged on both sides of the grooved wooden block.

[0016] Preferably, the rubber-coated roller is an insulating rubber roller.

[0017] Preferably, the material of the side-shaping acetal is polyoxymethylene.

[0018] Preferably, the module transfer guide rail is a linear guide rail.

[0019] The beneficial effects of this utility model are: This device drives the end plate pressure block with a precision servo motor and is equipped with a high-precision force sensor to achieve closed-loop pressure control. It can apply preset pressure to the module in the length direction with a pressure accuracy of ±1% FS and a length direction offset of <0.1mm. At the same time, it is compatible with modules composed of battery cells of different thicknesses, lengths and widths, taking into account high precision, low failure rate and strong compatibility.

[0020] The integrated three-way automatic shaping mechanism ensures the module is centered and positioned. The top insulating rubber roller array applies a force in the Z-axis direction to the cell electrode during extrusion, replacing sliding friction with rolling friction to avoid electrode damage and eliminate the flaring phenomenon. The steel strip pre-embedded groove, PET fastening limit block and multiple sets of sensors improve the ease of operation, safety and yield, and monitor the module status in real time to ensure the quality of extrusion and bundling. Attached Figure Description

[0021] Figure 1 is a schematic diagram of the overall structure of this utility model; Figure 2 is a schematic diagram of the module shaping mechanism in this utility model; Figure 3 is a perspective view of the pole column pressing mechanism in this utility model; Figure 4 is a perspective view of the module transfer and extrusion tray in this utility model; Figure 5 is a perspective view of the module extrusion mechanism in this utility model.

[0022] The attached diagram is described below: In the diagram: 1. Module transfer guide rail; 2. Module shaping mechanism; 21. Z-axis pressing cylinder; 22. Side shaping cylinder; 23. Photoelectric sensor; 24. Side shaping acetal cylinder; 25. End post pressing mechanism; 251. Rubber-coated roller mounting plate; 252. Rubber-coated roller; 3. Module transfer extrusion tray; 31. Extrusion servo motor; 32. Module transfer tray; 33. Module extrusion mechanism; 331. Through-beam sensor; 332. End plate pressure block; 333. PET strapping limit block; 334. Photoelectric sensor; 335. Grooved wooden pad; 336. Diffuse reflection sensor; 34. Tray transfer motor; 4. Battery module. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixed connection," and "fixed connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0027] Referring to Figures 1 to 3, the specific structure of this equipment includes a module transfer guide rail 1, a module shaping mechanism 2, and a module transfer extrusion tray 3. The module transfer extrusion tray 3 is slidably mounted on the module transfer guide rail 1 and can move along the guide rail. The module shaping mechanism 2 is located beside the module transfer guide rail 1 and on the moving path of the module transfer extrusion tray 3, and is used to shape the battery modules on the tray.

[0028] like Figure 2 and Figure 3 As shown, the module shaping mechanism 2 consists of a Z-axis pressing cylinder 21, a side shaping cylinder 22, a photoelectric sensor 23, a side shaping acetal 24, and a terminal pressing mechanism 25. The side shaping cylinder 22 is symmetrically distributed on both sides of the module transfer extrusion tray 3, and its output end is connected to the side shaping acetal 24, which can drive the acetal to shape the module in the width direction. The Z-axis pressing cylinder 21 is located above the tray, and its output end is connected to the terminal pressing mechanism 25. This mechanism includes a rubber-coated roller mounting plate 251 and an array of rubber-coated rollers 252. The rubber-coated rollers 252 are rotatably mounted on the mounting plate and are used to apply pressure in the Z-axis direction to the battery cell terminals. The photoelectric sensor 23 is located next to the side shaping cylinder 22 and is used to detect whether the tray is in place.

[0029] like Figure 4 and Figure 5 As shown, the module transfer extrusion tray 3 includes an extrusion servo motor 31, a module transfer tray 32, a module extrusion mechanism 33, and a tray transfer motor 34. The tray transfer motor 34 is connected to the module transfer tray 32 and drives the tray to slide along the module transfer guide rail 1. The module extrusion mechanism 33 is installed on the module transfer tray 32, and its end plate pressure block 332 is connected to the output end of the extrusion servo motor 31. Two extrusion servo motors 31 are symmetrically arranged at both ends of the tray, which can drive the end plate pressure block 332 to apply pressure to the module length direction. In addition, the module extrusion mechanism 33 also includes a grooved pad 335, on which a steel strip pre-embedded groove is opened, PET strapping limit blocks 333 symmetrically arranged on both sides of the grooved pad 335, two sets of side and one set of top through-beam sensors 331, a photoelectric sensor 334, and a diffuse reflection sensor 336 on the side of the grooved pad.

[0030] During operation, the steel strip is manually placed into the pre-embedded groove of the grooved pad 335 of the module extrusion mechanism 33. After the diffuse reflection sensor 336 detects that the steel strip is in place and the manual presses the button, the pallet transfer motor 34 drives the module transfer extrusion pallet 3 to move to the module loading position of the module transfer guide rail 1. The KUKA robot places the battery module 4 on the module transfer extrusion pallet 3. After the photoelectric sensor 334 detects that the module is in place, the module transfer extrusion pallet 3 moves to the shaping position. After the pallet is in place and the photoelectric sensor 23 detects that it is in place, the side shaping cylinder 22 drives the side shaping insert 24 to shape the width of the battery module 4. At the same time, the Z-axis pressing cylinder 21 drives the terminal pressing mechanism 25 to make each rubber-coated roller 252 press precisely on each terminal (pressure 50~500N). A pair of extrusion servo motors 31 work simultaneously to drive the end plate pressure block 332 to extrude the module length to the size of the steel strip. During the extrusion process, three sets of through-beam sensors 331 monitor the dimensions of the module side and top in real time, and the press also monitors the pressure in real time. If an abnormality is detected or the pressure exceeds the limit, the press is immediately released to the original position. While extruding in the length direction, the pallet transfer motor 34 drives the module transfer extrusion pallet 3 to the steel strip position. The steel strip is manually taken from the material rack for assembly. The lower steel strip is taken out from the grooved pad 335 of the module extrusion mechanism 33 for assembly. After the assembly is completed, the diffuse reflection sensor 336 detects that the steel strip is no longer on the grooved pad. After pressing button 335, if there is a PET strapping below the battery module 4, the operator takes a section of PTE strapping from the material rack and inserts it through the left and right limit blocks 333 set on the module extrusion mechanism 33 to limit its movement. Then, the operator uses a packing machine to secure it. The detection limit of the diffuse reflection sensor 336 is canceled and the button is pressed directly. A pair of extrusion servo motors 31 move backward to the module length position. The operator presses the button again and moves the extrusion servo motors 31 backward to the initial position. The module transfer extrusion tray 3 moves to the unloading position. The robot grabs the battery module 4 and moves the module transfer extrusion tray 3 to the pre-embedded steel strip position. This process is repeated.

[0031] For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A battery module extrusion sleeve steel strip or PET strip equipment, characterized in that, It includes a module transplanting guide rail (1), a module shaping mechanism (2), and a module transplanting extrusion tray (3); the module transplanting extrusion tray (3) is slidably disposed on the module transplanting guide rail (1), and the module shaping mechanism (2) is disposed on the side of the module transplanting guide rail (1) and located on the moving path of the module transplanting extrusion tray (3).

2. The device according to claim 1, characterized in that, The module shaping mechanism (2) includes a Z-axis pressing cylinder (21), a side shaping cylinder (22), a photoelectric sensor (23), a side shaping acetal (24), and a pole pressing mechanism (25). The side shaping cylinder (22) is symmetrically arranged on both sides of the module transfer extrusion tray (3), and the side shaping acetal (24) is connected to the output end of the side shaping cylinder (22). The Z-axis pressing cylinder (21) is arranged on the frame of the module shaping mechanism (2) and located above the module transfer extrusion tray (3). The pole pressing mechanism (25) is connected to the output end of the Z-axis pressing cylinder (21). The photoelectric sensor (23) is arranged beside the side shaping cylinder (22) and is used to detect the position of the module transfer extrusion tray (3).

3. The device according to claim 2, characterized in that, The pole pressing mechanism (25) includes a rubber-coated roller mounting plate (251) and rubber-coated rollers (252); the rubber-coated roller mounting plate (251) is connected to the output end of the Z-axis pressing cylinder (21), and a plurality of rubber-coated rollers (252) are rotatably mounted on the rubber-coated roller mounting plate (251), and the plurality of rubber-coated rollers (252) are arranged in an array.

4. The device according to claim 1, characterized in that, The module transplanting extrusion tray (3) includes an extrusion servo motor (31), a module transplanting tray (32), a module extrusion mechanism (33), and a tray transplanting motor (34); the tray transplanting motor (34) is connected to the module transplanting tray (32) and drives the module transplanting tray (32) to slide on the module transplanting guide rail (1); the module extrusion mechanism (33) is set on the module transplanting tray (32), and the extrusion servo motor (31) is connected to the module extrusion mechanism (33) and drives the module extrusion mechanism (33) to move.

5. The device according to claim 4, characterized in that, The module extrusion mechanism (33) includes a through-beam sensor (331), an end plate pressure block (332), a PET strapping limit block (333), a bottom photoelectric sensor (334), a grooved wooden block (335), and a diffuse reflection sensor (336); the end plate pressure block (332) is connected to the output end of the extrusion servo motor (31); the grooved wooden block (335) is set on the module transfer tray (32), and a steel strip pre-embedded groove is opened on it; the PET The binding limit block (333) is set on the side of the grooved wooden block (335); the two sets of the through-beam sensors (331) are respectively set on the side of the module extrusion mechanism (33), and one set of the through-beam sensors (331) is set on the top of the module extrusion mechanism (33); the bottom photoelectric sensor (334) is set on the module transplanting tray (32) to detect whether the module is in place; the diffuse reflection sensor (336) is set on the side of the grooved wooden block (335) to detect whether the steel strip is in place.

6. The device according to claim 5, characterized in that, There are two extrusion servo motors (31), which are symmetrically arranged at both ends of the module transfer tray (32), and the output ends of the two extrusion servo motors (31) are connected to the end plate pressure block (332).

7. The device according to claim 5, characterized in that, There are two PET strapping and limiting blocks (333), which are symmetrically arranged on both sides of the grooved pad (335).

8. The device according to claim 3, characterized in that, The rubber-coated roller (252) is an insulating rubber roller.

9. The device according to claim 2, characterized in that, The side-shaping acetal (24) is made of polyoxymethylene.

10. The device according to claim 1, characterized in that, The module transfer guide rail (1) is a linear guide rail.

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