Battery production line and manufacturing method

Abstract

The invention discloses a battery production line and a manufacturing method, and relates to the technical field of battery production lines. The system specifically comprises a cell processing island which can realize on-line, OCV test, rubberizing and stacking processes of cells; the module processing island can be used for realizing the assembly and extrusion forming of the battery cell group; the module boxing island can complete grabbing and boxing of the battery cell module and constraining the size of the module in the process; the gluing island can complete cleaning and gluing of the bottom of the box body; the air tightness test island can complete the air tightness test of the boxed battery module and the liquid cooling plate; the welding island can complete the welding process of the integrated cover plate on the box body; the constant-torque island can be used for tightening and constant-torque bolts on the box body; and the plurality of automatic guide vehicles can be used for transporting products among the functional islands, and the technological process switching of the CTP products and the large-module products is realized through different paths, so that the compatibility of the CTP products and the large-module products is realized. The invention aims to realize flexible switching between CTP and large module products so as to adapt to rapid change and diversified requirements of a new energy battery market.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production lines, and in particular to a battery production line and a manufacturing method. Background Art

[0002] With the continuous adjustment and optimization of the global energy structure, the new energy industry, especially new energy vehicles, has developed rapidly, driving the leapfrog progress of power battery technology. As the core component of new energy vehicles, the performance of power batteries directly affects the vehicle's range, safety and service life. In recent years, with the diversification of market demand and the continuous innovation of technology, new energy battery module products have shown the characteristics of continuous iteration and a wide variety of types.

[0003] First, the technology iteration speed of battery modules is accelerating, and new materials and new processes are constantly emerging. For example, with the maturity of lithium battery technology, new battery technologies such as solid-state batteries and sodium-ion batteries are gradually being applied to the market. These new batteries have significant advantages in energy density, safety and cycle life. At the same time, the advancement of battery management system (BMS) technology has also promoted the development of battery modules towards higher intelligence. The integration of these technologies has made the design and manufacturing of battery modules more complex and diversified.

[0004] The types of battery modules are becoming increasingly diverse, mainly reflected in the coexistence of CTP (Cell to Pack) technology and large module products. CTP technology directly integrates battery cells into the battery pack by eliminating the intermediate structure between the battery cell and the module, significantly improving energy density and space utilization. Large module products, on the other hand, enhance the structural strength and heat dissipation performance of the module by integrating multiple battery cells into one module. These two different types of battery modules exist simultaneously in the market, meeting the needs of different vehicle models and application scenarios.

[0005] However, traditional production lines usually use fixed process flows and equipment configurations, which make it difficult to quickly adapt to the production needs of new battery modules. Especially when CTP and large module products need to be produced at the same time, traditional production lines are unable to cope with equipment adjustment, process switching and production efficiency. It is impossible to achieve rapid conversion and efficient production between different product types, resulting in increased production costs, longer production cycles, and even affecting product quality and market response speed.

[0006] Therefore, how to achieve flexible switching between CTP and large module products to adapt to the rapid changes and diversified demands of the new energy battery market has become a technical problem that needs to be solved urgently. Summary of the invention

[0007] The main purpose of the present invention is to provide a battery production line and manufacturing method, aiming to achieve flexible switching between CTP and large module products to adapt to the rapid changes and diversified needs of the new energy battery market.

[0008] In order to achieve the above object, the present invention proposes a battery production line, comprising: The cell processing island is used to implement the cell on-line, OCV testing, gluing and stacking processes to form a cell group; The module processing island is used to realize the assembly and extrusion of the battery cell group to form a battery cell module; The module loading island is used to complete the grabbing and loading of the battery cell modules into the box and to constrain the module size during the process; Gluing island, used to complete the cleaning and gluing of the bottom of the box; Air tightness test island, used to complete air tightness test of boxed battery modules and liquid cooling plates; Welding island, used to complete the welding process of the integrated cover on the box; Torque island, used to tighten and torque the bolts on the box; The electrical testing island is used to complete the electrical performance test of the battery pack; and Multiple automatic guided vehicles are used to transport products between functional islands, and process switching between CTP products and large module products is achieved through different paths to achieve compatibility between CTP products and large module products. The battery production line improves the automation rate, flexibility and compatibility of the production process through modular design. The introduction of automatic guided vehicles enables the production line to flexibly switch between different process flows, improving the production efficiency and compatibility of CTP products and large module products. At the same time, through efficient collaboration, real-time data transmission and automated control, each functional island achieves seamless connection of each process link, ensures the accuracy and stability of the production process, reduces manual intervention and operation risks, and improves the overall efficiency of the production line and product quality.

[0009] In one embodiment of the present application, when the battery production line is to produce CTP products: The automatic guided vehicle transports the battery cells to the battery cell processing island and the module processing island for processing, and transports the processed battery cell modules to the module box island; The automatic guided vehicle transports the box to the gluing island, and transports the glued box to the module box inlet island; After the module loading island places the battery cell module into the glue-coated box, the automatic guided vehicle will transport the battery cell module to the welding island; after the box welding is completed, the automatic guided vehicle will transport the battery cell module to the torque fixing island to complete the bolt tightening and torque fixing; after completion, the automatic guided vehicle will transport the battery cell module to the air tightness test island to complete the air tightness test; after the test is completed, the automatic guided vehicle will transport the battery cell module to the electrical testing island to complete the electrical performance test.

[0010] Through this design, the production line can efficiently and flexibly complete the production of CTP products. During the production process, the automatic guided vehicle realizes the efficient transportation between the battery module and the box and equipment, greatly improving the automation level and production efficiency of the production line.

[0011] In one embodiment of the present application, when the battery production line is a large module product: The automatic guided vehicle transports the battery cells to the battery cell processing island and the module processing island for processing in turn, and transports the processed battery cell modules to the welding island; when there are multiple battery cell modules in the welding island, the welding island completes the welding between multiple battery cell modules to form a cascade module; the automatic guided vehicle transports the cascade module to the module box island; The automatic guided vehicle transports the box to the gluing island, and transports the glued box to the module box inlet island; After the module loading island places the cascade module into the box that has been coated with glue, the automatic guided vehicle will transport the cascade module that has been loaded into the box to the welding island; after the box welding is completed, the automatic guided vehicle will transport the cascade module that has completed box welding to the torque fixing island to complete the bolt tightening and torque fixing; after completion, the automatic guided vehicle will transport the cascade module that has completed the torque fixing to the air tightness testing island to complete the air tightness test; after the test is completed, the automatic guided vehicle will transport the cascade module that has completed the air tightness test to the electrical testing island to complete the electrical performance test.

[0012] When producing large module products, the battery production line achieves a high degree of automation of the production process through efficient transportation of automatic guided vehicles and precise collaboration of multi-functional islands. In particular, the cascade module welding process on the welding island can flexibly connect multiple battery modules, improving the production efficiency of large modules.

[0013] In one embodiment of the present application, the cell processing island includes: Battery cell online equipment, OCV testing equipment, battery cell gluing equipment, battery cell stacking equipment, and module online equipment.

[0014] By setting up each device in the cell processing island in sequence, the continuity and efficiency of the cell processing process are ensured. Cell production, OCV testing, gluing, stacking, module production and other processes are completed in the same island, reducing the material transfer time between different workstations and improving the overall production line operation efficiency.

[0015] In one embodiment of the present application, the module processing island includes: Module side panel assembly equipment, middle partition and / or heating film assembly equipment, and pressurization and shaping equipment. The sequential arrangement of each device in the module processing island ensures the continuity and efficiency of the battery cell assembly process. The key steps such as module side panel assembly, middle partition / heating film assembly, and pressurization and shaping are seamlessly connected, avoiding the downtime caused by material handling and equipment switching during the production process, thereby improving production efficiency.

[0016] In one embodiment of the present application, the module loading island is composed of a robot and an electric cylinder clamping device.

[0017] The combination of the robot and the electric cylinder gripper device makes the module boxing process highly automated. The robot can accurately locate and carry the battery module according to the predetermined path, while the electric cylinder gripper device accurately controls the movement of the gripper to complete the operation of accurately grabbing the battery module and placing it into the box. It significantly improves the work efficiency of the production line, reduces manual operation and human intervention, and thus speeds up the entire production process.

[0018] In one embodiment of the present application, the glue island is composed of a box plasma cleaning device and a box glue coating device. The box plasma cleaning device uses plasma technology to treat the surface of the box, effectively removing oil, dust and other pollutants on the surface of the box, thereby improving the cleanliness of the box surface. After plasma cleaning, a strong polarity will be formed on the surface of the box, which enhances the adhesion of the glue in the subsequent glue coating process. It can ensure the firm adhesion between the glue coating layer and the surface of the box, and improve the stability of the glue coating effect and the reliability of long-term use.

[0019] In one embodiment of the present application, the welding island is composed of a pole addressing device, an integrated cover installation device, a laser welding device, a post-weld detection device, a post-weld cleaning device, and an EOL detection device.

[0020] The pole addressing device ensures the accurate identification and positioning of the pole position in the battery module, avoiding welding problems caused by inaccurate pole position. Through precise positioning, the laser welding equipment can perform high-quality welding between the pole and the integrated cover, ensuring the firmness of the welding point and the stability of the electrical connection. Effectively improving the quality and reliability of the battery module.

[0021] The present application also discloses a battery manufacturing method, comprising the following steps: Determine whether the battery to be produced is a CTP battery pack. If so, use an automatic guided vehicle to transport the battery cells to the battery cell processing island and module processing island for processing; Transport the processed battery cell modules to the module loading island; Use an automatic guided vehicle to transport the boxes to the gluing island, and then transport the glued boxes to the module loading island; After placing the battery cell module into the glue-coated box at the module loading island, an automatic guided vehicle is used to transport the completed battery cell module to the welding island; After the box body welding is completed, the automatic guided vehicle is used to transport the welded battery cell module to the torque island for bolt tightening and torque setting; After the torque setting is completed, an automatic guided vehicle is used to transport the battery cell module that has completed the torque setting to the air tightness test island for air tightness testing; After the air tightness test is completed, an automatic guided vehicle is used to transport the battery cell module that has completed the air tightness test to the electrical testing island for electrical performance testing.

[0022] In one embodiment of the present application, it is determined whether the battery to be produced is a CTP battery pack. If not, the battery cell is sequentially transported to the battery cell processing island and the module processing island for processing by an automatic guided vehicle; The processed battery cell modules are transported to the welding island, where multiple battery cell modules are welded to form a cascade module; The automatic guided vehicle transports the cascade modules to the module loading island; The automatic guided vehicle transports the box to the gluing island, and transports the glued box to the module box inlet island; The module loading island puts the cascade module into the box that has been glued; The automatic guided vehicle transports the completed cascade modules to the welding island for box welding; After welding is completed, the automatic guided vehicle transports the cascade module with the box body welded to the torque island for bolt tightening and torque setting operations; After completing the torque setting operation, the automatic guided vehicle transports the cascade module to the air tightness test island for air tightness test; After the test is completed, the automated guided vehicle will be transported through the cascade module of the airtightness test to the electrical testing island for electrical performance testing.

[0023] By adopting the above technical solutions, the battery production line has improved the automation rate, flexibility and compatibility of the production process through modular design. The introduction of automatic guided vehicles enables the production line to flexibly switch between different process flows, improving the production efficiency and compatibility of CTP products and large module products. At the same time, each functional island achieves seamless connection of various process links through efficient collaboration, real-time data transmission and automated control, ensuring the accuracy and stability of the production process, reducing manual intervention and operation risks, and improving the overall efficiency of the production line and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is described in detail below with reference to specific embodiments and accompanying drawings, wherein: Figure 1 It is a structural schematic diagram of a first embodiment of the present invention; Figure 2 The figure is a schematic diagram of the process structure of a battery manufacturing method of the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the present invention and do not constitute a limitation to the present invention.

[0026] like Figure 1 As shown, in order to achieve the above-mentioned purpose, the present invention proposes a battery production line, comprising: The cell processing island is used to implement the cell on-line, OCV testing, gluing and stacking processes to form a cell group; The module processing island is used to realize the assembly and extrusion of the battery cell group to form a battery cell module; The module loading island is used to complete the grabbing and loading of the battery cell modules into the box and to constrain the module size during the process; Gluing island, used to complete the cleaning and gluing of the bottom of the box; Air tightness test island, used to complete air tightness test of boxed battery modules and liquid cooling plates; Welding island, used to complete the welding process of the integrated cover on the box; Torque island, used to tighten and torque the bolts on the box; The electrical testing island is used to complete the electrical performance test of the battery pack; and Multiple automatic guided vehicles are used to transport products between functional islands, and process flow switching between CTP products and large module products is achieved through different paths to achieve compatibility between CTP (Cell-to-Pack) products and large module products.

[0027] Specifically, the main functions of the cell processing island are to complete the cell online, OCV (open circuit voltage) test, cell gluing and cell stacking processes. During the cell online process, the cells are sent from the feeding area to the processing area by automated equipment, and OCV tests are performed to ensure that the voltage of the cells meets the standard requirements. In the cell gluing process, the appropriate amount of glue is applied to the surface of the cells through the gluing equipment to ensure the bonding effect when the cells are stacked. During the cell stacking process, the cells will be stacked according to the design requirements to form a cell group, and the stacked cell group will be transported to the module processing island by an automatic guided vehicle.

[0028] The function of the module processing island is to assemble and extrude the battery cell group to form a battery cell module. In the module processing island, the battery cell group is first assembled with the end side plate, middle partition plate, heating film and other components through automated assembly equipment to ensure the structural stability of the battery cell group. After the assembly is completed, the battery cell module is pressed together through the extrusion molding equipment to ensure the dimensional accuracy of the module and the firmness of the overall structure.

[0029] The function of the module loading island is to complete the grabbing and loading of the battery module into the box, and in the process, constrain the size of the module to ensure the stability of the module in the subsequent process. The island is mainly composed of a robot and an electric cylinder gripper device. The robot grabs the assembled battery module according to the instructions of the control system and puts it into the box accurately. The electric cylinder gripper device will constrain the size of the module through the clamping device during the grabbing process to avoid deformation of the module in the subsequent process.

[0030] The gluing island is mainly used to complete the cleaning and gluing process of the bottom of the box. The box is first surface treated by plasma cleaning equipment to remove dirt and grease on the surface of the box to ensure good adhesion of the glue. After cleaning, the bottom of the box is evenly coated with glue by the gluing equipment to form a protective layer to increase the sealing.

[0031] The airtightness test island is used to complete the airtightness test of the boxed battery modules and liquid cooling plates. The island uses airtightness test equipment to test the airtightness of the boxed battery modules and liquid cooling plates to ensure that the packaged battery modules can maintain internal gas leakage during use, thereby improving the safety and performance of the battery. The test process uses automated airtightness test equipment that can automatically detect and record test results to ensure that each battery module meets quality standards.

[0032] The main function of the welding island is to complete the welding process of the integrated cover on the box. The equipment in the island includes pole addressing, integrated cover installation, laser welding, post-weld inspection and cleaning equipment. The pole addressing equipment first locates the contact points on the box to ensure that the integrated cover is accurately docked with the battery module. Subsequently, the laser welding equipment welds the integrated cover to ensure the welding quality. After welding, the post-weld inspection equipment will perform quality inspection on the welding points to ensure that there are no welding defects. Finally, the cleaning equipment removes excess solder to ensure the cleanliness of the welding area.

[0033] The torque island is mainly used to tighten and torque the bolts on the box. The torque station in the island uses automated tools to accurately tighten the bolts of the battery pack and ensure that the torque of each bolt meets the design requirements. The torque equipment can automatically detect the torque value and exchange data with other process flows through the control system to ensure that the assembly process of each battery pack meets the quality requirements.

[0034] The electrical testing island is used to complete the electrical performance test of the battery pack. The electrical performance test cabinet in the island can test the voltage, current, internal resistance and other parameters of the battery pack, and record the test data through the data acquisition and analysis system. The electrical testing island can feedback the test results in real time through linkage with the control system to ensure that the electrical performance of each battery pack meets the design standards.

[0035] Multiple automated guided vehicles are used to transport products between various functional islands. The automated guided vehicles automatically travel on different paths within the production line through the built-in navigation system, and quickly transport products between islands such as the battery cell processing island, module processing island, module box island, glue coating island, air tightness test island, welding island, fixed torsion island, and electrical measurement island to ensure efficient connection between various process links. The automated guided vehicles switch paths according to production needs and process flows to achieve compatibility with CTP products and large module products, and improve the flexibility and compatibility of the production line.

[0036] The above islands transmit and collaborate data through automated control systems and sensors. The control system monitors the status of each functional island in real time to ensure efficient coordination and seamless connection between devices. The data transmission system transmits the working status, test data, transmission status and other information of each device to the central control unit through a wireless or wired network to achieve optimized scheduling and management of the entire production line.

[0037] By adopting the above technical solutions, the battery production line has improved the automation rate, flexibility and compatibility of the production process through modular design. The introduction of automatic guided vehicles enables the production line to flexibly switch between different process flows, improving the production efficiency and compatibility of CTP products and large module products. At the same time, each functional island achieves seamless connection of various process links through efficient collaboration, real-time data transmission and automated control, ensuring the accuracy and stability of the production process, reducing manual intervention and operation risks, and improving the overall efficiency of the production line and product quality.

[0038] In one embodiment of the present application, when the battery production line is to produce CTP products: The automatic guided vehicle transports the battery cells to the battery cell processing island and the module processing island for processing, and transports the processed battery cell modules to the module box island; The automatic guided vehicle transports the box to the gluing island, and transports the glued box to the module box inlet island; After the module loading island places the battery cell module into the glue-coated box, the automatic guided vehicle will transport the battery cell module to the welding island; after the box welding is completed, the automatic guided vehicle will transport the battery cell module to the torque fixing island to complete the bolt tightening and torque fixing; after completion, the automatic guided vehicle will transport the battery cell module to the air tightness test island to complete the air tightness test; after the test is completed, the automatic guided vehicle will transport the battery cell module to the electrical testing island to complete the electrical performance test.

[0039] Specifically, when producing CTP products, the automatic guided vehicle transports the battery cells to the battery cell processing island and the module processing island in turn. The battery cell processing island first completes the battery cell online, OCV testing, battery cell gluing and battery cell stacking processes. After the battery cells complete all preparation processes in this island, they are stacked into battery cell groups. The stacked battery cell groups are then transported to the module processing island by the automatic guided vehicle.

[0040] The module processing island receives the battery cell groups from the battery cell processing island, assembles and extrudes them to form battery cell modules. The island uses automated equipment to assemble the battery cell groups with end side panels, middle partitions, heating films and other components to ensure the structural stability of the battery cell modules. After assembly, the battery cell modules are processed by extrusion molding equipment to ensure that the module size and overall structure meet the design requirements. The processed battery cell modules are transported by automatic guided vehicles to the module box island for temporary storage.

[0041] During the production process, the automatic guided vehicle transports the box to the gluing island, which is responsible for cleaning and gluing the bottom of the box. The box is surface treated by plasma cleaning equipment to ensure that the glue can be evenly attached. The cleaned box is glued by the gluing equipment. After the gluing is completed, the automatic guided vehicle transports the glued box to the module entry island to match the battery module.

[0042] The module loading island receives the battery module and the glue-coated box from the automatic guided vehicle, and places the battery module into the glue-coated box. This process is completed by the robot arm and electric cylinder clamp device to ensure that the position of the battery module in the box is accurate and stable. After the battery module is successfully loaded into the box, the automatic guided vehicle transports the completed battery module to the welding island.

[0043] After receiving the battery modules from the module loading island, the welding island will perform the integrated cover welding process of the box. The integrated cover and the box are welded by laser welding equipment, and the welding quality is tested by post-welding inspection equipment. Ensure that the welding area is firm and free of defects. After welding is completed, the automatic guided vehicle transports the welded battery modules to the fixed torsion island.

[0044] The main task of the torque island is to tighten and torque the bolts on the battery module. The automated torque station tightens each bolt on the box through a precise torque control system to ensure that the torque of each bolt meets the specified standard. This process ensures that the battery pack has a strong structure and can maintain stability during use. After the torque process is completed, the automatic guided vehicle transports the processed battery module to the airtightness test island.

[0045] The air tightness test island performs air tightness tests on the battery modules in the box to ensure that there is no gas leakage in the battery modules and liquid cooling plates after packaging. The air tightness test equipment detects the sealing of the box and the liquid cooling plate through the detection equipment to ensure that the battery module maintains good air tightness during operation. After the test is completed, the automatic guided vehicle will transport the battery modules that have passed the air tightness test to the electric test island.

[0046] The function of the electrical testing island is to conduct a comprehensive test on the electrical performance of the battery pack. The electrical testing island uses the electrical performance test cabinet to test the important electrical performance parameters of the battery module, such as voltage, current, and internal resistance. The test results will be fed back to the control system to confirm whether the quality and performance of the battery module meet the standards. After the electrical test is completed, the battery module can be processed or shipped out according to the production process.

[0047] By adopting the above technical solution and this design, the production line can efficiently and flexibly complete the production of CTP (Cell-to-Pack) products. During the production process, the automatic guided vehicle realizes the efficient transportation between the battery module and the box and equipment, greatly improving the automation level and production efficiency of the production line.

[0048] In one embodiment of the present application, when the battery production line is a large module product: The automatic guided vehicle transports the battery cells to the battery cell processing island and the module processing island for processing in turn, and transports the processed battery cell modules to the welding island; when there are multiple battery cell modules in the welding island, the welding island completes the welding between multiple battery cell modules to form a cascade module; the automatic guided vehicle transports the cascade module to the module box island; The automatic guided vehicle transports the box to the gluing island, and transports the glued box to the module box inlet island; After the module loading island places the cascade module into the box that has been coated with glue, the automatic guided vehicle will transport the cascade module that has been loaded into the box to the welding island; after the box welding is completed, the automatic guided vehicle will transport the cascade module that has completed box welding to the torque fixing island to complete the bolt tightening and torque fixing; after completion, the automatic guided vehicle will transport the cascade module that has completed the torque fixing to the air tightness testing island to complete the air tightness test; after the test is completed, the automatic guided vehicle will transport the cascade module that has completed the air tightness test to the electrical testing island to complete the electrical performance test.

[0049] Specifically, when producing large module products, the automatic guided vehicle transports the battery cells to the battery processing island in sequence. The task of the battery processing island is to complete the battery cell on-line, OCV testing, battery cell gluing and battery cell stacking process. The battery cells are stacked to form a battery cell group. The completed battery cell group is transported to the module processing island by the automatic guided vehicle for further assembly.

[0050] After the module processing island receives the battery cell group, it assembles and extrude the battery cell group through automated equipment to form a battery cell module. The battery cell module consists of the assembly of the battery cell group with end side plates, middle partitions, heating membranes and other structural parts. The module processing island uses precise molding equipment to ensure the dimensional accuracy and overall structural stability of the battery cell module. The processed battery cell module is transported to the welding island by an automatic guided vehicle.

[0051] After the welding island receives the battery cell modules delivered by the automatic guided vehicle, it will complete the welding operation between multiple battery cell modules according to production needs to form a cascade module. The welding island connects multiple battery cell modules through laser welding equipment to ensure that the welding points are firm, and conducts inspections through post-welding inspection equipment to ensure that the welding quality meets the standards. After the cascade module is welded, it is transported by the automatic guided vehicle to the module box island for temporary storage.

[0052] The gluing island is responsible for the cleaning and gluing process of the bottom of the box. The automatic guided vehicle transports the box to the gluing island, where the surface of the box is first treated by a plasma cleaning device to ensure the surface is clean. Then, the box is coated with glue by the gluing equipment to form a protective layer to improve the sealing. After the gluing is completed, the box is transported to the module entry island by an automatic guided vehicle and assembled with the cascade module.

[0053] The module loading island receives the cascade modules from the AGV and places them into the glued box. This process is completed by the robot arm and the electric cylinder gripper device to ensure the accurate position of the cascade modules in the box. The matching of the battery module and the box is precisely controlled by the control system. After the loading is completed, the AGV transports the loaded cascade modules to the welding island for box welding.

[0054] The welding island welds the integrated cover of the cascade module. This process uses laser welding equipment to complete the welding between the cover and the box to ensure the welding quality. After welding, the welding quality will be checked by post-weld inspection equipment to confirm that there are no defects in the welding points to ensure the sealing and firmness of the module box. After welding is completed, the automatic guided vehicle will transport the cascade module with completed box welding to the fixed torsion island.

[0055] The torque island is mainly responsible for tightening and torqueing the bolts of the cascade module. The torque station tightens the bolts on the box through a precise torque control system to ensure that each bolt reaches the designed torque value. This process is to ensure that the box of the cascade module is tightly connected to the battery cell module and to ensure the structural stability of the battery pack. After the torque is completed, the cascade module will be transported to the airtightness test island by an automatic guided vehicle.

[0056] The air tightness test island performs air tightness tests on the cascade modules in the box to ensure that the air tightness of the battery modules and liquid cooling plates after packaging meets the requirements. The air tightness test equipment simulates the air tightness during use to ensure that there will be no gas leakage in the battery module. After the test is completed, the automatic guided vehicle transports the cascade modules that have completed the air tightness test to the electrical test island.

[0057] The electrical testing island completes the electrical performance test of the cascade module. The electrical performance test cabinet in the island tests the key electrical performance parameters of the battery module, such as voltage, current, and internal resistance, to ensure that the electrical performance of the battery module meets the design requirements. The test results will be fed back to the control system in real time to monitor the production quality. After the test is completed, the cascade module enters the next stage or is ready for shipment.

[0058] It is conceivable that after completing the inspection of the electrical testing island, it can also return to the air tightness test island for testing, and then enter the electrical testing island for testing, thereby improving its safety.

[0059] By adopting the above technical solution, the battery production line has achieved a high degree of automation in the production process when producing large module products through the efficient transportation of automatic guided vehicles and the precise cooperation of multi-functional islands. In particular, the cascade module welding process on the welding island can flexibly connect multiple battery modules, improving the production efficiency of large modules.

[0060] In one embodiment of the present application, the cell processing island includes: Battery cell online equipment, OCV testing equipment, battery cell gluing equipment, battery cell stacking equipment, and module online equipment.

[0061] The above technical solution ensures the continuity and efficiency of the cell processing process by setting up the various equipment in the cell processing island in sequence. Cell production, OCV testing, gluing, stacking and module production are all completed in the same island, which reduces the material transfer time between different workstations and improves the overall production line operation efficiency.

[0062] In one embodiment of the present application, the module processing island includes: Module end and side panel assembly equipment, middle partition and / or heating film assembly equipment, and pressurizing and shaping equipment.

[0063] With the above technical solution, the sequential arrangement of the equipment in the module processing island ensures the continuity and efficiency of the cell assembly process. The key steps such as module end and side panel assembly, middle partition / heating film assembly and pressurization shaping are seamlessly connected, avoiding the downtime caused by material handling and equipment switching during the production process, thereby improving production efficiency.

[0064] In one embodiment of the present application, the module loading island is composed of a robot and an electric cylinder clamping device.

[0065] With the above technical solution, the combination of the robot and the electric cylinder gripper device makes the module boxing process highly automated. The robot can accurately locate and carry the battery module according to the predetermined path, while the electric cylinder gripper device can accurately grasp the battery module and put it into the box by precisely controlling the movement of the gripper. This significantly improves the work efficiency of the production line, reduces manual operation and human intervention, and thus speeds up the entire production process.

[0066] In one embodiment of the present application, the glue coating island is composed of a box plasma cleaning device and a box glue coating device.

[0067] By adopting the above technical solution, the box plasma cleaning equipment uses plasma technology to treat the box surface, effectively removing oil, dust and other pollutants on the box surface, and improving the cleanliness of the box surface. After plasma cleaning, the box surface will form a strong polarity, which enhances the adhesion of the glue in the subsequent gluing process. It can ensure the firm bonding between the glue layer and the box surface, and improve the stability of the gluing effect and the reliability of long-term use.

[0068] In one embodiment of the present application, the welding island is composed of a pole addressing device, an integrated cover installation device, a laser welding device, a post-weld inspection device, a post-weld cleaning device, and an EOL (end of line test) inspection device.

[0069] With the above technical solution, the pole addressing equipment ensures the accurate identification and positioning of the pole in the battery module, avoiding welding problems caused by inaccurate pole position. Through precise positioning, the laser welding equipment can perform high-quality welding between the pole and the integrated cover, ensuring the firmness of the welding point and the stability of the electrical connection. Effectively improving the quality and reliability of the battery module.

[0070] like Figure 2 As shown, the present application also discloses a battery manufacturing method, comprising the following steps: Determine whether the battery to be produced is a CTP battery pack. If so, use an automatic guided vehicle to transport the battery cells to the battery cell processing island and module processing island for processing; Transport the processed battery cell modules to the module loading island; Use an automatic guided vehicle to transport the boxes to the gluing island, and then transport the glued boxes to the module loading island; After placing the battery cell module into the glue-coated box at the module loading island, an automatic guided vehicle is used to transport the completed battery cell module to the welding island; After the box body welding is completed, the automatic guided vehicle is used to transport the welded battery cell module to the torque island for bolt tightening and torque setting; After the torque setting is completed, an automatic guided vehicle is used to transport the battery cell module that has completed the torque setting to the air tightness test island for air tightness testing; After the air tightness test is completed, an automatic guided vehicle is used to transport the battery cell module that has completed the air tightness test to the electrical testing island for electrical performance testing.

[0071] In one embodiment of the present application, it is determined whether the battery to be produced is a CTP battery pack. If not, the battery cell is sequentially transported to the battery cell processing island and the module processing island for processing by an automatic guided vehicle; The processed battery cell modules are transported to the welding island, where multiple battery cell modules are welded to form a cascade module; The automatic guided vehicle transports the cascade modules to the module loading island; The automatic guided vehicle transports the box to the gluing island, and transports the glued box to the module box inlet island; The module loading island puts the cascade module into the box that has been glued; The automatic guided vehicle transports the completed cascade modules to the welding island for box welding; After welding is completed, the automatic guided vehicle transports the cascade module with the box body welded to the torque island for bolt tightening and torque setting operations; After completing the torque setting operation, the automatic guided vehicle transports the cascade module to the air tightness test island for air tightness test; After the test is completed, the automated guided vehicle will be transported through the cascade module of the airtightness test to the electrical testing island for electrical performance testing.

[0072] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery production line, characterized in that: include: The cell processing island is used to implement the cell on-line, OCV testing, gluing and stacking processes to form a cell group; The module processing island is used to realize the assembly and extrusion of the battery cell group to form a battery cell module; The module loading island is used to complete the grabbing and loading of the battery cell modules into the box and to constrain the module size during the process; Gluing island, used to complete the cleaning and gluing of the bottom of the box; Air tightness test island, used to complete air tightness test of boxed battery modules and liquid cooling plates; Welding island, used to complete the welding process of the integrated cover on the box; Torque island, used to tighten and torque the bolts on the box; The electrical testing island is used to complete the electrical performance test of the battery pack; and Multiple automatic guided vehicles are used to transport products between functional islands, and process flow switching between CTP products and large module products is achieved through different paths to achieve compatibility between CTP products and large module products.

2. The battery production line according to claim 1, characterized in that: When the battery production line produces CTP products: The automatic guided vehicle transports the battery cells to the battery cell processing island and the module processing island for processing, and transports the processed battery cell modules to the module box island; The automatic guided vehicle transports the box to the gluing island, and transports the glued box to the module box inlet island; After the module loading island places the battery cell module into the glue-coated box, the automatic guided vehicle will transport the battery cell module to the welding island; after the box welding is completed, the automatic guided vehicle will transport the battery cell module to the torque fixing island to complete the bolt tightening and torque fixing; after completion, the automatic guided vehicle will transport the battery cell module to the air tightness test island to complete the air tightness test; after the test is completed, the automatic guided vehicle will transport the battery cell module to the electrical testing island to complete the electrical performance test.

3. The battery production line according to claim 1, characterized in that: When the battery production line is a large module product: The automatic guided vehicle transports the battery cells to the battery cell processing island and the module processing island for processing in turn, and transports the processed battery cell modules to the welding island; when there are multiple battery cell modules in the welding island, the welding island completes the welding between multiple battery cell modules to form a cascade module; the automatic guided vehicle transports the cascade module to the module box island; The automatic guided vehicle transports the box to the gluing island, and transports the glued box to the module box inlet island; After the module loading island places the cascade module into the box that has been coated with glue, the automatic guided vehicle will transport the cascade module that has been loaded into the box to the welding island; after the box welding is completed, the automatic guided vehicle will transport the cascade module that has completed box welding to the torque fixing island to complete the bolt tightening and torque fixing; after completion, the automatic guided vehicle will transport the cascade module that has completed the torque fixing to the air tightness testing island to complete the air tightness test; after the test is completed, the automatic guided vehicle will transport the cascade module that has completed the air tightness test to the electrical testing island to complete the electrical performance test.

4. The battery production line according to claim 1, characterized in that: The cell processing island includes: Battery cell online equipment, OCV testing equipment, battery cell gluing equipment, battery cell stacking equipment, and module online equipment.

5. The battery production line according to claim 1, characterized in that: The module processing island includes: Module end and side panel assembly equipment, middle partition and / or heating film assembly equipment, and pressurizing and shaping equipment.

6. The battery production line according to claim 1, characterized in that: The module loading island is composed of a robot and an electric cylinder clamping device.

7. The battery production line according to claim 1, characterized in that: The glue coating island is composed of a box plasma cleaning device and a box glue coating device.

8. The battery production line according to claim 1, characterized in that: The welding island is composed of pole addressing equipment, integrated cover installation equipment, laser welding equipment, post-weld detection equipment, post-weld cleaning equipment, and EOL detection equipment.

9. A battery manufacturing method, characterized in that: The following steps are involved: Determine whether the battery to be produced is a CTP battery pack. If so, use an automatic guided vehicle to transport the battery cells to the battery cell processing island and module processing island for processing; Transport the processed battery cell modules to the module loading island; Use an automatic guided vehicle to transport the boxes to the gluing island, and then transport the glued boxes to the module loading island; After placing the battery cell module into the glue-coated box at the module loading island, an automatic guided vehicle is used to transport the completed battery cell module to the welding island; After the box body welding is completed, the automatic guided vehicle is used to transport the welded battery cell module to the torque island for bolt tightening and torque setting; After the torque setting is completed, an automatic guided vehicle is used to transport the battery cell module that has completed the torque setting to the air tightness test island for air tightness testing; After the air tightness test is completed, an automatic guided vehicle is used to transport the battery cell module that has completed the air tightness test to the electrical testing island for electrical performance testing.

10. The battery manufacturing method according to claim 9, characterized in that: Determine whether the battery to be produced is a CTP battery pack. If not, transport the battery cell to the battery cell processing island and module processing island for processing in sequence through an automatic guided vehicle; The processed battery cell modules are transported to the welding island, where multiple battery cell modules are welded to form a cascade module; The automatic guided vehicle transports the cascade modules to the module loading island; The automatic guided vehicle transports the box to the gluing island, and transports the glued box to the module box inlet island; The module loading island puts the cascade module into the box that has been glued; The automatic guided vehicle transports the completed cascade modules to the welding island for box welding; After welding is completed, the automatic guided vehicle transports the cascade module with the box body welded to the torque island for bolt tightening and torque setting operations; After completing the torque setting operation, the automatic guided vehicle transports the cascade module to the air tightness test island for air tightness test; After the test is completed, the automated guided vehicle will be transported through the cascade module of the airtightness test to the electrical testing island for electrical performance testing.

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