Full-automatic U-shaped glue pasting device for battery cell and storage method of full-automatic U-shaped glue pasting device

Abstract

The invention discloses a full-automatic battery cell U-shaped glue pasting device which comprises a device body, and a battery cell rotating mechanism is arranged in the device body; the battery cell rotating mechanism comprises an electric rotating disc, the electric rotating disc is rotatably installed in the device body, a servo motor is fixedly installed on the device body, the output end of the servo motor rotatably penetrates through the electric rotating disc, and a driving disc is fixedly installed at the end of the servo motor; a plurality of driving racks are fixedly installed on the driving disc, and a plurality of supporting columns are fixedly installed on the surface of the side, close to the driving disc, of the driving disc. Through meshing transmission of the driving racks on the driving disc and the driven gear and in combination with a sliding structure of the adjusting lead screw and the placement frame, the radial position of a battery cell can be automatically adjusted; compared with a traditional manual adjusting device, the device has the advantages that the rubberizing positioning precision is improved, and the adaptability and rubberizing consistency of battery cells of different specifications are remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of glue sticking devices, and in particular relates to a fully automatic U-shaped glue sticking device for battery cells and a storage method thereof. Background Art

[0002] In the large-scale production of lithium-ion batteries, the U-shaped glue sticking process for battery cells is a key link in ensuring the structural stability and safety of the battery. The existing fully automatic U-shaped glue sticking device for battery cells has a simple structure, which reduces the accuracy of U-shaped glue sticking, preventing the battery cells from causing pole piece displacement due to expansion stress during the charge and discharge cycle, thereby avoiding the risk of short circuit. At the same time, battery cell storage is an important process in the back-end of battery production. Its environmental control and pressure management directly affect the long-term stability of battery cell performance. Especially for glued battery cells, the compatibility between the glue layer and the pole piece during storage, the influence of environmental parameters, and structural deformation caused by stacking pressure will all affect the performance of the battery cells. Summary of the Invention

[0003] The object of the present invention is to provide a fully automatic battery cell U-shaped glue sticking device to solve the problems of simple structure and battery cell storage of the fully automatic battery cell U-shaped glue sticking device proposed in the above background technology.

[0004] In a first aspect, the present invention provides a fully automatic U-shaped adhesive bonding device for battery cells, comprising:

[0005] A device body, wherein a battery core rotating mechanism is provided inside the device body;

[0006] The battery core rotation mechanism includes an electric rotating disc, which is rotatably mounted inside the device body, and a servo motor is fixedly mounted on the device body. The output end of the servo motor rotates through the electric rotating disc, and a driving disc is fixedly mounted at its end, and a plurality of driving racks are fixedly mounted on the driving disc, and a plurality of supporting columns are fixedly mounted on the side surface of the driving disc close to the driving disc, and a first placement rack is fixedly mounted on the end of the support column away from the electric rotating disc, and a second placement rack is slidingly provided inside the first placement rack, and an adjusting screw is inserted into the interior of the first placement rack for rotation, and a driven gear is fixedly mounted on the end of the adjusting screw facing the servo motor, and the driven gear is meshed with the driving rack.

[0007] In a possible implementation of the first aspect, symmetrically distributed support frames are fixedly mounted on the device body, and a buffer pad is provided at the bottom of the support frame.

[0008] In a possible implementation of the first aspect, a mechanical shaft is slidably provided on the inner side wall of the device body, a gluing mechanism is provided on the mechanical shaft, and a battery cell positioning mechanism is provided on the gluing mechanism.

[0009] In a possible implementation of the first aspect, a first receiving slot is defined inside the first placement rack, and the second placement rack is used in conjunction with the first receiving slot.

[0010] In a possible implementation of the first aspect, a second receiving groove is defined inside the second placement rack, and the adjusting screw rod is used in conjunction with the second receiving groove.

[0011] In a possible implementation of the first aspect, a transmission damping block is provided between the driving disc and the electric rotating disc.

[0012] Compared with the prior art, the present invention provides a fully automatic U-shaped adhesive device for battery cells, which has the following features:

[0013] Beneficial effects:

[0014] 1. The present invention can automatically adjust the radial position of the battery cell through the meshing transmission of the driving rack and the driven gear on the driving disc, combined with the sliding structure of the adjustment screw and the placement rack, without the need for manual calibration. Compared with traditional manual adjustment devices, it improves the glue positioning accuracy and significantly improves the adaptability and glue consistency of battery cells of different specifications.

[0015] 2. In the present invention, multiple first placement racks and second placement racks can be used to perform glue application on multiple battery cells at one time, thereby increasing the output of battery cells per unit time.

[0016] In a second aspect, the present invention provides a storage method for a fully automatic battery cell U-shaped adhesive device, comprising:

[0017] Obtaining glued cells processed by a fully automatic battery cell U-shaped glue sticking device, performing flaw detection on the glued cells to obtain cell flaw detection data, analyzing cell defect characteristics corresponding to the glued cells based on the cell flaw detection data, and setting a cell quality level corresponding to the glued cells based on the cell defect characteristics;

[0018] Collecting storage environment parameters of the glued battery cell, querying material chemical properties and material physical properties corresponding to the glued battery cell, and calculating the storage adaptability of the glued battery cell in the storage environment based on the storage environment parameters and the material chemical properties;

[0019] The cell design structure corresponding to the glue-covered cell is retrieved, and the storage pressure limit corresponding to the glue-covered cell is calculated in combination with the physical properties of the material and the cell design structure. In combination with the cell quality level, the storage adaptability and the storage pressure limit, storage processing of the glue-covered cell is performed to obtain a storage result.

[0020] In a possible implementation of the second aspect, analyzing the cell defect characteristics corresponding to the glued cell based on the cell flaw detection data includes:

[0021] Performing image enhancement processing on the battery cell flaw detection data to obtain an enhanced flaw detection image;

[0022] Performing image segmentation processing on the enhanced flaw detection image to separate the image defect area and the image normal area;

[0023] Extracting defect contour information of the image defect area, and locating the defect position of the adhesive-bonded battery cell based on the image defect area;

[0024] Calculating defect geometric features corresponding to the defect area of ​​the image based on the defect contour information;

[0025] The defect geometric features and the defect position are combined to generate the cell defect features corresponding to the glued cell.

[0026] In a possible implementation of the second aspect, calculating the storage suitability of the glued battery cell in the storage environment by combining the storage environment parameters and the material chemical properties includes:

[0027] Standardizing the storage environment parameters to obtain standard storage environment parameters;

[0028] Analyzing key material chemical properties among the material chemical properties, and marking the property critical values ​​corresponding to the key material chemical properties;

[0029] Calculating the deviation between the standard storage environment parameters and the attribute critical value to obtain an environment-attribute deviation matrix;

[0030] Analyzing environmental sensitivities corresponding to the chemical properties of the materials, and assigning chemical property weights corresponding to the chemical properties of the materials based on the environmental sensitivities;

[0031] The storage adaptability of the adhesive-coated battery cell in the storage environment is calculated by combining the chemical property weight and the environment-property deviation matrix.

[0032] In a possible implementation of the second aspect, calculating the storage pressure limit corresponding to the rubber-bonded battery cell in combination with the physical properties of the material and the battery cell design structure includes:

[0033] Disassembling and analyzing the battery cell design structure to obtain battery cell configuration topology parameters;

[0034] Performing mechanical property screening on the physical properties of the material to obtain the mechanical and physical properties of the material;

[0035] Determining a shell stress threshold corresponding to the adhesive-bonded battery cell based on the mechanical and physical properties of the material;

[0036] Combining the cell configuration topology parameters and the shell stress threshold, the storage pressure limit corresponding to the glued cell is calculated using the following formula:

[0037]

[0038] Among them, A represents the storage pressure limit corresponding to the glue-bonded battery cell, B represents the shell stress threshold, D represents the shell thickness in the battery cell configuration topology parameters, E represents the shell geometry correction coefficient, F represents the shell height in the battery cell configuration topology parameters, G represents the corrected elastic modulus critical value, H represents the thickness of a single pole piece in the battery cell configuration topology parameters, L represents the number of pole piece stacking layers in the battery cell configuration topology parameters, M represents the geometric correction coefficient of the pole piece configuration, N represents the pole piece length, and v represents the Poisson's ratio of the material.

[0039] It can be seen that the present invention can obtain the defect characteristic information of the glue-covered battery cell by analyzing the battery cell defect characteristics corresponding to the glue-covered battery cell based on the battery cell flaw detection data, and set the battery cell quality level corresponding to the glue-covered battery cell based on the battery cell defect characteristics, and then perform graded management and targeted treatment on the glue-covered battery cell, thereby effectively reducing storage problems caused by battery cell quality. The present invention calculates the storage adaptability of the glue-covered battery cell in the storage environment by combining the storage environment parameters and the chemical properties of the material, and then understands the stability of the glue-covered battery cell in the current environment, providing data support for optimizing storage conditions; the present invention calculates the storage pressure extreme value corresponding to the glue-covered battery cell by combining the physical properties of the material and the battery cell design structure, and can accurately understand the critical value of the pressure that the battery cell can withstand in the storage environment, thereby avoiding problems such as battery cell deformation and leakage due to abnormal pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0041] Figure 1 This is a schematic diagram of the three-dimensional structure of a fully automatic U-shaped adhesive bonding device for battery cells according to one embodiment of the present invention;

[0042] Figure 2 This is a cross-sectional schematic diagram of a fully automatic U-shaped adhesive bonding device for battery cells according to one embodiment of the present invention;

[0043] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at A;

[0044] Figure 4A schematic cross-sectional view of a first placement rack structure proposed in one embodiment of the present invention;

[0045] Figure 5 A flow chart of a storage method for a fully automatic battery cell U-shaped adhesive device proposed in one embodiment of the invention;

[0046] In the figure: 1. Device body; 11. Support frame; 12. Mechanical axis; 13. Gluing mechanism; 14. Battery cell positioning mechanism; 2. Battery cell rotation mechanism; 21. Electric rotating disc; 22. Servo motor; 23. Driving disc; 24. Support column; 25. Driving rack; 26. First placement rack; 27. Second placement rack; 28. Adjusting screw; 29. ​​Driven gear; 211. First storage slot; 212. Second storage slot. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] See also Figure 1 , which is a schematic diagram of the three-dimensional structure of the fully automatic battery cell U-shaped glue sticking device proposed in the present invention, including a device body 1. A battery cell rotation mechanism 2 is provided inside the device body 1 for driving the battery cell to be accurately positioned and rotated during the glue sticking process. A symmetrically distributed support frame 11 is fixedly mounted on the device body 1. A buffer pad is provided at the bottom of the support frame 11, which can effectively reduce the vibration generated during the operation of the device, reduce noise, and enhance the stability of the device placement, thereby avoiding the impact of glue sticking accuracy due to uneven ground or slight shaking.

[0049] See also Figure 2, which is a cross-sectional schematic diagram of a fully automatic battery cell U-shaped glue device proposed in one embodiment of the present invention. The battery cell rotating mechanism 2 includes an electric rotating disc 21, which is rotatably installed inside the device body 1. The electric rotating disc 21 is made of high-strength aluminum alloy and has good strength and lightweight characteristics. It can effectively reduce the moment of inertia and achieve fast start and stop and precise positioning. A servo motor 22 is fixedly installed on the device body 1. The output end of the servo motor 22 rotates through the electric rotating disc 21, and a driving disc 23 is fixedly installed at its end. A plurality of support columns 24 are fixedly installed on the surface of the driving disc 23 on one side close to the driving disc 23. The support columns 24 adopt a hollow carbon fiber structure, which further reduces the weight while ensuring strength. A mechanical shaft 12 is slidingly provided on the inner side wall of the device body 1, and a gluing mechanism 13 is provided on the mechanical shaft 12. The gluing mechanism 13 adopts a modular design and can quickly replace components such as the glue nozzle and the glue quantity control module according to different U-shaped glue specifications and gluing process requirements. A battery cell positioning mechanism 14 is provided on the gluing mechanism 13. The battery cell positioning mechanism 14 adopts a high-precision visual recognition system combined with electromagnetic adsorption technology, which can accurately locate the battery cell position within milliseconds and firmly adsorb it. A transmission damping block is provided between the driving disc 23 and the electric rotating disc 21. The damping block is made of a special rubber-metal composite material and has adjustable damping characteristics. When the electric rotating disc 21 rotates, the driving disc 23 can rotate with the electric rotating disc 21 when there is no external force driving it.

[0050] See also Figure 3 , for the present invention Figure 2 A schematic diagram of the structure at point A is enlarged, and a plurality of driving racks 25 are fixedly mounted on the driving disc 23, and the driven gear 29 is meshed with the driving rack 25. When the driving disc 23 rotates, the driven gear 29 can be driven to rotate by the driving rack 25.

[0051] See also Figure 4 , is a schematic cross-sectional view of the first placement rack structure proposed in an embodiment of the present invention, wherein a first placement rack 26 is fixedly installed at one end of the support column 24 away from the electric rotating disc 21, a second placement rack 27 is slidingly provided inside the first placement rack 26, an adjusting screw rod 28 is rotatably inserted inside the first placement rack 26, and a driven gear 29 is fixedly installed at one end of the adjusting screw rod 28 facing the servo motor 22, a first receiving groove 211 is provided inside the first placement rack 26, the second placement rack 27 is used in conjunction with the first receiving groove 211, so that the size of the first placement rack 26 can be adjusted by moving the second placement rack 27, a second receiving groove 212 is provided inside the second placement rack 27, and the adjusting screw rod 28 is used in conjunction with the second receiving groove 212.

[0052] The working principle and use process of the fully automatic U-shaped glue sticking device for battery cells of the present invention are as follows: when in use, the electric rotating disc 21 is first started to rotate, and then the battery cells to be glued are placed in the first placement rack 26 and the second placement rack 27. After the placement is completed, the electric rotating disc 21 is turned off, and the servo motor 22 is started. The servo motor 22 drives the driving disc 23 to rotate, and the driving rack 25 drives the driven gear 29 to rotate, and then drives the adjusting screw 28 to rotate, and the adjusting screw 28 drives the second placement rack 27 to move until the first placement rack 26 is closed. The servo motor 22 is turned off until the second placement rack 27 clamps the battery cell, the battery cell positioning mechanism 14 is used to locate the position of the battery cell, and the gluing mechanism 13 is driven by the mechanical shaft 12 to glue the battery cell. After the gluing is completed, the electric rotating disk 21 is started to rotate, the battery cell with glue is transferred away, and the battery cell without glue is transferred to the gluing mechanism 13, and processed in sequence until the gluing of all the battery cells is completed. Finally, the servo motor 22 is started to reverse, driving the second placement rack 27 to move in the opposite direction, and finally the battery cell with glue is removed.

[0053] See Figure 5 FIG. 1 is a storage method of a fully automatic battery cell U-shaped adhesive device according to an embodiment of the present invention, comprising:

[0054] S1. Obtain a glued battery cell processed by a fully automatic battery cell U-shaped glue sticking device, perform flaw detection on the glued battery cell to obtain battery cell flaw detection data, analyze battery cell defect characteristics corresponding to the glued battery cell based on the battery cell flaw detection data, and set a battery cell quality level corresponding to the glued battery cell based on the battery cell defect characteristics.

[0055] The present invention can obtain defect feature information of the glued battery cell by analyzing the battery cell defect features corresponding to the glued battery cell based on the battery cell flaw detection data, set the battery cell quality level corresponding to the glued battery cell based on the battery cell defect features, and then perform hierarchical management and targeted treatment on the glued battery cell, effectively reducing storage problems caused by battery cell quality, wherein the glued battery cell is a finished battery cell that has been U-shaped glued by a fully automatic battery cell U-shaped glue device, the battery cell flaw detection data is data information on the internal structure and U-shaped glue bonding status of the glued battery cell obtained by ultrasonic, X-ray and other flaw detection means, the battery cell defect features are characterization parameters such as type, position, size and other internal defects corresponding to the glued battery cell, further, the ultrasonic flaw detector can be used to detect the The glued battery cell is subjected to flaw detection to obtain the battery cell flaw detection data; based on the battery cell defect characteristics, the battery cell quality level corresponding to the glued battery cell is set, and the specific setting steps are: first, the severity of the impact of the defect type on the battery cell performance is graded, and defects such as cracks and delamination that seriously affect the safety and performance of the battery cell are classified as high-risk categories, and bubbles, small impurities and other defects with less impact are classified as low-risk categories; secondly, based on the geometric characteristic parameters of the defect, such as defect area and length, a quantitative grading threshold is set, for example, when the defect area exceeds 5% of the battery cell surface area, it is judged as an unqualified level; finally, based on the defect location, the quality level judgment standard for defects located in key parts of the battery cell (such as electrode connections) is improved, and the above factors are combined to finally determine the battery cell quality level corresponding to the glued battery cell.

[0056] As an embodiment of the present invention, analyzing the cell defect characteristics corresponding to the glued cell based on the cell flaw detection data includes:

[0057] Performing image enhancement processing on the battery cell flaw detection data to obtain an enhanced flaw detection image;

[0058] Performing image segmentation processing on the enhanced flaw detection image to separate the image defect area and the image normal area;

[0059] Extracting defect contour information of the image defect area, and locating the defect position of the adhesive-bonded battery cell based on the image defect area;

[0060] Calculating defect geometric features corresponding to the defect area of ​​the image based on the defect contour information;

[0061] The defect geometric features and the defect position are combined to generate the cell defect features corresponding to the glued cell.

[0062] Among them, the enhanced flaw detection image is the image result after the battery cell flaw detection data is processed by image enhancement to enhance the contrast between defects and background; the image defect area and the image normal area are respectively the image areas containing defective parts and non-defective parts separated by image segmentation processing of the enhanced flaw detection image; the defect contour information is the edge shape and boundary line data of the image defect area; the defect position is the specific coordinates or location where the defect exists inside or on the surface of the glued battery cell; the defect geometric features are the quantitative size parameters such as area, length, width, and circumference of the image defect area calculated based on the contour information.

[0063] Furthermore, the cell flaw detection data can be subjected to image enhancement processing by a grayscale transformation algorithm to obtain an enhanced flaw detection image; the enhanced flaw detection image can be subjected to image segmentation processing by a threshold segmentation algorithm to separate the image defect area and the image normal area; the contour information of the defect in the image defect area can be extracted by an edge detection operator (such as a Canny operator, a Sobel operator); based on the image defect area, the defect position of the glued cell can be located by a coordinate mapping method; based on the contour information, the defect geometric features corresponding to the image defect area can be calculated by a geometric calculation method (such as area, perimeter, and length formula); the defect geometric features and the defect position are combined, and the defect type judgment results are integrated to generate the cell defect features corresponding to the glued cell.

[0064] S2. Collect storage environment parameters of the glued battery cell, query the material chemical properties and material physical properties corresponding to the glued battery cell, and calculate the storage adaptability of the glued battery cell in the storage environment by combining the storage environment parameters and the material chemical properties.

[0065] The present invention calculates the storage adaptability of the glue-coated battery cell in the storage environment by combining the storage environment parameters and the material chemical properties, thereby understanding the stability of the glue-coated battery cell in the current environment and providing data support for optimizing storage conditions. The storage environment parameters are the real-time temperature and humidity, air pressure, corrosive gas concentration and other environmental index data of the environment in which the glue-coated battery cell is located during storage. The material chemical properties and the material physical properties are respectively the chemical activity of the electrode material corresponding to the glue-coated battery cell, the decomposition temperature of the electrolyte and other chemical reaction-related characteristics, as well as the shell hardness, the membrane air permeability and other physical performance parameters. The storage adaptability represents a quantitative evaluation index of the ability of the glue-coated battery cell to maintain its own performance stability after the chemical properties of the material interact with the environmental factors in the storage environment. Furthermore, the storage environment parameters of the glue-coated battery cell can be collected by environmental monitoring equipment such as temperature and humidity sensors and gas detectors; the material chemical properties and material physical properties corresponding to the glue-coated battery cell can be queried by consulting the battery cell material specification and calling the enterprise material database.

[0066] As an embodiment of the present invention, the calculation of the storage adaptability of the adhesive-bonded battery cell in the storage environment by combining the storage environment parameters and the material chemical properties includes:

[0067] Standardizing the storage environment parameters to obtain standard storage environment parameters;

[0068] Analyzing key material chemical properties among the material chemical properties, and marking the property critical values ​​corresponding to the key material chemical properties;

[0069] Calculating the deviation between the standard storage environment parameters and the attribute critical value to obtain an environment-attribute deviation matrix;

[0070] Analyzing environmental sensitivities corresponding to the chemical properties of the materials, and assigning chemical property weights corresponding to the chemical properties of the materials based on the environmental sensitivities;

[0071] The storage adaptability of the adhesive-coated battery cell in the storage environment is calculated by combining the chemical property weight and the environment-property deviation matrix.

[0072] Among them, the standard storage environment parameters are dimensionless values ​​obtained after the storage environment parameters are standardized, eliminating dimension differences to uniformly measure the degree of deviation of each environmental parameter from ideal conditions; the key material chemical properties are the core properties of the material chemical properties that play a decisive role in the storage stability of the battery cell and are easily affected by environmental factors and cause performance degradation; the property critical value is the extreme threshold of the environmental parameter that the key material chemical property can withstand under normal storage conditions, exceeding which will cause significant changes in the material chemical properties; the environment-property deviation matrix is ​​a two-dimensional data table constructed based on the deviation between the standard storage environment parameters and the property critical value, which is used to intuitively present the adaptation relationship between each environmental factor and the critical conditions of the material property; the environmental sensitivity is an indicator of the response degree of the material chemical property to changes in environmental parameters, reflecting the difficulty of the material to undergo chemical changes when the environment fluctuates; the chemical property weight is a quantitative influence coefficient assigned to the material chemical property based on the environmental sensitivity, with properties with higher sensitivity being assigned greater weights to highlight their impact on storage adaptability.

[0073] Furthermore, the storage environment parameters can be standardized by a normalization algorithm or dimensionless processing (such as Min-Max standardization, Z-score standardization) to obtain standard storage environment parameters; the key material chemical properties in the material chemical properties can be analyzed by consulting the technical documents of the battery cell materials and combining failure mode analysis (FMEA) to screen the properties that significantly affect the storage stability; the property critical values ​​corresponding to the key material chemical properties can be marked by referring to the material safety data sheet (MSDS), material performance test data and industry standards; the deviation between the standard storage environment parameters and the property critical values ​​can be obtained by calculating the relative deviation between the standard storage environment parameters and the property critical values, and the environment-property deviation matrix can be obtained; the environmental sensitivity corresponding to the material chemical properties can be analyzed by accelerated aging experiments and molecular dynamics simulations; based on the environmental sensitivity, a weight distribution model is constructed according to the sensitivity ratio or the hierarchical analysis method (AHP) to allocate the chemical property weights corresponding to the material chemical properties; combined with the chemical property weights and the environment-property deviation matrix, the storage adaptability of the adhesive-bonded battery cell in the storage environment is calculated by weighted summation.

[0074] S3. Retrieve the cell design structure corresponding to the glue-covered cell, calculate the storage pressure limit corresponding to the glue-covered cell based on the material physical properties and the cell design structure, and perform storage processing on the glue-covered cell based on the cell quality level, the storage adaptability, and the storage pressure limit to obtain a storage result.

[0075] The present invention calculates the storage pressure limit corresponding to the glue-covered battery cell by combining the physical properties of the material and the battery cell design structure, so as to accurately understand the critical value of the pressure that the battery cell can withstand in the storage environment, and avoid problems such as battery cell deformation and leakage due to abnormal pressure. Among them, the battery cell design structure is the geometric structure and component arrangement parameters such as the electrode stacking method, shell material and size, and U-shaped glue pasting position corresponding to the glue-covered battery cell; the storage pressure limit is the maximum pressure critical value that the glue-covered battery cell can withstand in the storage environment without structural damage or performance degradation; further, the battery cell design structure corresponding to the glue-covered battery cell can be retrieved through the enterprise product database.

[0076] As an embodiment of the present invention, the step of calculating the storage pressure limit corresponding to the adhesive-bonded battery cell in combination with the physical properties of the material and the battery cell design structure includes:

[0077] Disassembling and analyzing the battery cell design structure to obtain battery cell configuration topology parameters;

[0078] Performing mechanical property screening on the physical properties of the material to obtain the mechanical and physical properties of the material;

[0079] Determining a shell stress threshold corresponding to the adhesive-bonded battery cell based on the mechanical and physical properties of the material;

[0080] Combining the cell configuration topology parameters and the shell stress threshold, the storage pressure limit corresponding to the glued cell is calculated using the following formula:

[0081]

[0082] Among them, A represents the storage pressure limit corresponding to the glue-bonded battery cell, B represents the shell stress threshold, D represents the shell thickness in the battery cell configuration topology parameters, E represents the shell geometry correction coefficient, F represents the shell height in the battery cell configuration topology parameters, G represents the corrected elastic modulus critical value, H represents the thickness of a single pole piece in the battery cell configuration topology parameters, L represents the number of pole piece stacking layers in the battery cell configuration topology parameters, M represents the geometric correction coefficient of the pole piece configuration, N represents the pole piece length, and v represents the Poisson's ratio of the material.

[0083] Among them, the cell configuration topology parameters are the geometric shape and hierarchical arrangement parameters obtained by disassembly and analysis of the cell design structure; the material mechanical physical properties are the stress, elastic modulus and other mechanical related parameters obtained by mechanical property screening of the material physical properties; the shell stress threshold is the maximum stress critical value that the shell material corresponding to the glue-bonded cell can withstand; the shell geometric correction coefficient is a correction parameter based on the influence of the shell shape and size on the cell stress distribution; the corrected elastic modulus critical value is the elastic modulus limit reference value set after considering the nonlinear characteristics of the material; the single pole piece thickness is the geometric thickness parameter of the single-layer pole piece (including active material and current collector) in the cell configuration topology parameters; the number of pole piece stacking layers is the total number of pole pieces stacked in the "positive electrode-diaphragm-negative electrode" unit in the cell configuration topology parameters; the geometric correction coefficient is a quantitative correction factor for the influence of the shape and size of the pole piece configuration on the mechanical properties; the pole piece length is the extended size parameter of the pole piece in the winding or stacking direction of the cell.

[0084] Furthermore, the battery cell design structure can be disassembled and analyzed through three-dimensional modeling software or engineering drawing analysis to obtain the battery cell configuration topology parameters; the material physical properties can be screened for mechanical properties through material mechanical performance test report screening or mechanical property database retrieval to obtain the material mechanical and physical properties; based on the material mechanical and physical properties, the shell stress threshold corresponding to the glue-bonded battery cell can be determined through material yield strength experimental data or mechanical limit parameter calculation.

[0085] The present invention performs storage processing on the adhesive-bonded battery cell by combining the battery cell quality level, the storage adaptability and the storage pressure extreme value, thereby improving the storage efficiency of the adhesive-bonded battery cell. Furthermore, the storage processing of the adhesive-bonded battery cell is performed by combining the battery cell quality level, the storage adaptability and the storage pressure extreme value. The specific storage processing steps are: dividing the storage priority according to the battery cell quality level, the first-level battery cell can be directly stored on the conventional shelf, and the third-level battery cell needs to be preferentially allocated to the constant temperature and humidity sealed cabin; according to the storage adaptability Adjust the environmental parameters. When the adaptability is less than 0.6, start the nitrogen filling system to control the ambient oxygen content below 0.5%, and monitor the temperature and humidity fluctuation range in real time (temperature ± 2°C, humidity ± 5% RH). Configure the buffer device according to the storage pressure extreme value, such as laying a 5mm thick silicone cushion pad (hardness 30 Shore A) between the battery cell stacking layers to ensure that the stacking pressure does not exceed 80% of the extreme value, and install a pressure sensor on the load-bearing surface of the shelf for real-time warning, so as to perform storage processing on the glued battery cells and obtain the storage results.

[0086] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A fully automatic U-shaped adhesive bonding device for battery cells, comprising a device body (1), characterized in that: A battery core rotating mechanism (2) is provided inside the device body (1); The battery core rotating mechanism (2) comprises an electric rotating disc (21), the electric rotating disc (21) being rotatably mounted inside the device body (1), a servo motor (22) being fixedly mounted on the device body (1), an output end of the servo motor (22) being rotatably passed through the electric rotating disc (21), and a driving disc (23) being fixedly mounted at its end, a plurality of driving racks (25) being fixedly mounted on the driving disc (23), and a drive rack (25) being fixedly mounted on the driving disc (23). A plurality of support columns (24) are fixedly mounted on the side surface, a first placement frame (26) is fixedly mounted on one end of the support column (24) away from the electric rotating disc (21), a second placement frame (27) is slidably mounted inside the first placement frame (26), an adjusting screw rod (28) is rotatably inserted inside the first placement frame (26), a driven gear (29) is fixedly mounted on one end of the adjusting screw rod (28) facing the servo motor (22), and the driven gear (29) is meshed and connected with the driving rack (25).

2. The fully automatic U-shaped adhesive bonding device for battery cells according to claim 1, characterized in that: A symmetrically distributed support frame (11) is fixedly mounted on the device body (1), and a buffer pad is provided at the bottom of the support frame (11).

3. The fully automatic U-shaped adhesive bonding device for battery cells according to claim 1, characterized in that: A mechanical shaft (12) is slidably provided on the inner side wall of the device body (1), a glue sticking mechanism (13) is provided on the mechanical shaft (12), and a battery core positioning mechanism (14) is provided on the glue sticking mechanism (13).

4. The fully automatic U-shaped adhesive bonding device for battery cells according to claim 1, characterized in that: A first receiving groove (211) is provided inside the first placement rack (26), and the second placement rack (27) is used in conjunction with the first receiving groove (211).

5. The fully automatic U-shaped adhesive bonding device for battery cells according to claim 1, characterized in that: A second receiving groove (212) is provided inside the second placement rack (27), and the adjusting screw rod (28) is used in conjunction with the second receiving groove (212).

6. The fully automatic U-shaped adhesive bonding device for battery cells according to claim 1, characterized in that: A transmission damping block is provided between the driving disc (23) and the electric rotating disc (21).

7. A storage method for a fully automatic battery cell U-shaped glue device, wherein the storage method is performed by the fully automatic battery cell U-shaped glue device according to any one of claims 1 to 6, characterized in that: The method comprises: Obtaining glued cells processed by a fully automatic battery cell U-shaped glue sticking device, performing flaw detection on the glued cells to obtain cell flaw detection data, analyzing cell defect characteristics corresponding to the glued cells based on the cell flaw detection data, and setting a cell quality level corresponding to the glued cells based on the cell defect characteristics; Collecting storage environment parameters of the glued battery cell, querying material chemical properties and material physical properties corresponding to the glued battery cell, and calculating the storage adaptability of the glued battery cell in the storage environment based on the storage environment parameters and the material chemical properties; The cell design structure corresponding to the glue-covered cell is retrieved, and the storage pressure limit corresponding to the glue-covered cell is calculated in combination with the physical properties of the material and the cell design structure. In combination with the cell quality level, the storage adaptability and the storage pressure limit, storage processing of the glue-covered cell is performed to obtain a storage result.

8. The method according to claim 7, characterized in that The analyzing the cell defect characteristics corresponding to the glued cell based on the cell flaw detection data includes: Performing image enhancement processing on the battery cell flaw detection data to obtain an enhanced flaw detection image; Performing image segmentation processing on the enhanced flaw detection image to separate the image defect area and the image normal area; Extracting defect contour information of the image defect area, and locating the defect position of the adhesive-bonded battery cell based on the image defect area; Calculating defect geometric features corresponding to the defect area of ​​the image based on the defect contour information; The defect geometric features and the defect position are combined to generate the cell defect features corresponding to the glued cell.

9. The method according to claim 7, characterized in that The calculating the storage adaptability of the adhesive-bonded battery cell in the storage environment by combining the storage environment parameters and the material chemical properties includes: Standardizing the storage environment parameters to obtain standard storage environment parameters; Analyzing key material chemical properties among the material chemical properties, and marking the property critical values ​​corresponding to the key material chemical properties; Calculating the deviation between the standard storage environment parameters and the attribute critical value to obtain an environment-attribute deviation matrix; Analyzing environmental sensitivities corresponding to the chemical properties of the materials, and assigning chemical property weights corresponding to the chemical properties of the materials based on the environmental sensitivities; The storage adaptability of the adhesive-coated battery cell in the storage environment is calculated by combining the chemical property weight and the environment-property deviation matrix.

10. The method according to claim 7, characterized in that The calculating of the storage pressure limit corresponding to the adhesive-bonded battery cell by combining the physical properties of the material and the battery cell design structure includes: Disassembling and analyzing the battery cell design structure to obtain battery cell configuration topology parameters; Performing mechanical property screening on the physical properties of the material to obtain the mechanical and physical properties of the material; Determining a shell stress threshold corresponding to the adhesive-bonded battery cell based on the mechanical and physical properties of the material; Combining the cell configuration topology parameters and the shell stress threshold, the storage pressure limit corresponding to the glued cell is calculated using the following formula: Among them, A represents the storage pressure limit corresponding to the glue-bonded battery cell, B represents the shell stress threshold, D represents the shell thickness in the battery cell configuration topology parameters, E represents the shell geometry correction coefficient, F represents the shell height in the battery cell configuration topology parameters, G represents the corrected elastic modulus critical value, H represents the thickness of a single pole piece in the battery cell configuration topology parameters, L represents the number of pole piece stacking layers in the battery cell configuration topology parameters, M represents the geometric correction coefficient of the pole piece configuration, N represents the pole piece length, and v represents the Poisson's ratio of the material.

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