Automatic production line of solid-state battery cell

Abstract

The utility model discloses an automatic production line of a solid-state battery cell, and relates to the field of battery preparation devices. An automatic production line of a solid-state battery cell comprises a conveyor belt module which comprises a plurality of groups of conveyor belts and is used for transporting a battery and raw materials of the battery and moving the battery and the raw materials from one production area to another production area; the rolling module is used for rolling the coated pole piece, so that the pole piece reaches the required thickness and density; a lamination module; through the arrangement of the conveying belt module, the rolling module, the lamination module, the feeding module, the discharging module, the isostatic pressing module, the detection module, the formation and capacity grading module and the PACK module, the battery cell can be automatically and rapidly produced and processed, the production progress is accelerated, meanwhile, when isostatic pressing processing is carried out on the battery cell, the production efficiency is improved, and the production cost is reduced. And through the arrangement of the pressure sensor, the damage of the battery cell caused by local overlarge pressure is avoided, and the damage rate is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of battery manufacturing equipment technology, specifically, it relates to an automated production line for solid-state battery cells. Background Technology

[0002] In the current booming development of the new energy industry, solid-state batteries have become the focus of industry attention due to their high energy density and excellent safety. The manufacturing process of solid-state battery cells is a core factor determining the overall performance of the battery. However, although existing production lines have achieved a certain degree of automation, actual production technology still faces many severe challenges.

[0003] In the isostatic pressing process of solid-state battery cells, there is a problem of uneven pressure distribution in the static pressure chamber. Although some equipment is equipped with pressure monitoring devices, the control methods are relatively lagging and cannot balance the pressure in each area in real time and accurately. The phenomenon of excessive local pressure often occurs, which not only easily damages the battery cells and greatly increases production costs, but also seriously reduces the product qualification rate. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a battery preparation apparatus that can overcome or at least partially solve the above problems.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is: an automated production line for solid-state battery cells, further comprising:

[0006] Conveyor belt modules are used to transport batteries and their raw materials from one production area to another.

[0007] The rolling module rolls the coated electrode to achieve the required thickness and density.

[0008] The stacking module is formed by stacking and combining the positive and negative electrode sheets and the separator after roll pressing in a certain order and manner to form the battery cell;

[0009] The feeding module includes a feeding robot, which moves the stacked battery cells into the isostatic pressing module.

[0010] The unloading module includes an unloading robot arm, which removes the battery cells processed by the isostatic pressing module.

[0011] The detection module includes a battery detection device, which is used to detect the battery cells removed by the unloading robot and classify the detected battery cells as qualified or unqualified by the conveyor belt module.

[0012] The capacity testing module is a series high-voltage module used to charge qualified battery cells after testing, activate the positive and negative electrode materials of the battery, and enable the battery to have normal charge and discharge performance.

[0013] The PACK module encapsulates the battery cells after charging and discharging.

[0014] Furthermore, both the loading and unloading robotic arms are fixedly connected to a clamping assembly. The clamping assembly includes a mounting plate, a first cylinder, a second cylinder, a clamping plate, and a vision sensor. Two sets of first cylinders are symmetrically fixedly connected to the mounting plate, and two sets of second cylinders are fixedly connected to the telescopic ends of the first cylinders, with the telescopic ends of the two sets of second cylinders facing each other. The clamping plate is fixedly connected to the telescopic ends of the second cylinders, and the vision sensor is mounted on the second cylinder for detecting the position of the battery cells.

[0015] Furthermore, a compression airbag is fixedly connected to the clamping surface of the clamping plate, and a connecting tube is connected to the compression airbag.

[0016] Furthermore, the battery testing device includes an X-ray imaging device and a pushing component, wherein the X-ray imaging device is used to inspect the appearance of the battery cells after isostatic pressing.

[0017] Furthermore, the pushing component is used to classify the battery cells after they have been photographed by the X-ray imaging device. Qualified cells are pushed onto the conveyor belt leading to the formation process, while unqualified cells are pushed onto a conveyor belt for separate recycling processing later.

[0018] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The present invention, through the setting of conveyor belt module, roller pressing module, stacking module, feeding module, unloading module, isostatic pressing module, detection module, formation and capacity testing module, and PACK module, can automatically and quickly process battery cells, accelerate the production progress, and at the same time, when performing isostatic pressing on battery cells, the setting of pressure sensor avoids damage to battery cells caused by excessive local pressure, thereby reducing the damage rate. Attached Figure Description

[0019] In the attached diagram:

[0020] Figure 1 This is a schematic diagram of the structure of the conveyor belt module, feeding module, unloading module, processing module, and isostatic pressing module in an automated production line for solid-state battery cells proposed in this utility model.

[0021] Figure 2 This is a schematic diagram of the feeding module in an automated production line for solid-state battery cells according to this utility model.

[0022] Figure 3 A schematic diagram of the structure of a gripping component on a robotic arm in an automated production line for solid-state battery cells, as proposed in this utility model;

[0023] Figure 4 Schematic diagram 2 of the structure of the gripping component on the robotic arm in an automated production line for solid-state battery cells proposed in this utility model;

[0024] Figure 5 This utility model proposes an automated production line for solid-state battery cells. Figure 4 A schematic diagram of the structure of part A;

[0025] Figure 6 This invention presents a flowchart of the production line modules in an automated production line for solid-state battery cells.

[0026] In the diagram: 1. Loading robot; 101. Mounting plate; 102. Cylinder 1; 103. Cylinder 2; 104. Clamping plate; 105. Vision sensor; 106. Compression airbag; 107. Connecting pipe; 2. Isostatic pressure module; 3. Unloading robot; 4. Battery detection device. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0028] Example 1:

[0029] Reference Figure 1-6A method for isostatic pressing of solid-state battery cells includes an isostatic pressing module 2, and further includes: placing the battery cells into isostatic pressing chambers within the isostatic pressing module 2 and fixing the battery cells using a positioning device; then increasing the pressure inside the isostatic pressing chambers and continuously monitoring the pressure in each area of ​​the isostatic pressing chambers using pressure sensors; calculating the average pressure value based on the signal emitted by the pressure sensors; stopping the pressure increase and maintaining the current pressure after the average value reaches a first preset value; and after maintaining the pressure in the isostatic pressing chambers for a preset time period, decreasing the pressure in the isostatic pressing chambers until a second preset pressure value is reached. The isostatic pressing module 2 includes a static pressure chamber, a fixing and limiting component, a transformer, a pressure sensor, a removal component, and a cooling component. The static pressure chamber has multiple isostatic pressure zones for installing the transformer and pressure sensor to generate constant internal pressure. The fixing and limiting component and the removal component are both installed in the static pressure chamber. The cooling component is located at the unloading end of the removal component. The fixing and limiting component is used to fix the battery cell in the static pressure chamber. The removal component is used to remove the isostatically pressed battery cell to the cooling component. The cooling component is used to reduce the temperature of the battery cell to room temperature.

[0030] The positioning component in this device includes multiple sets of clamping cylinders for fixing the robot arm as it is lowered. The processing module 2 also has a small conveyor belt. After the battery cells are subjected to isostatic pressing, the battery cells are moved onto the conveyor belt by a removal component, which consists of one or more cylinders, through the extension of the telescopic end. The battery cells are then transported to the cooling component, which can be a fan or an air pump, to continuously cool the battery cells on the conveyor belt.

[0031] In practical use, the battery cell is fixed in the static pressure chamber by the positioning component. Then, the transformer is activated to increase the pressure in the static pressure chamber, and the pressure on the battery cell is detected by the pressure sensor. Since there are multiple static pressure zones, the pressure values ​​in these zones will vary slightly due to various factors. At this time, multiple pressure sensors are used to detect and record the pressure information, and the computer selects the average value. After the average value reaches the first preset pressure value, the transformer stops increasing the pressure, maintaining the pressure in the static pressure zone within a certain range. Static pressure treatment of the battery cell helps to ensure the isostatic pressure treatment effect of the solid-state battery cell. When the pressure in the isostatic pressure chamber is maintained for a preset time period, the isostatic pressure treatment of the solid-state battery cell is completed. At this time, the pressure in the isostatic pressure chamber needs to be depressurized, that is, the transformer component is controlled to slowly reduce the pressure, so that the pressure in the isostatic pressure chamber is less than the second preset pressure, which facilitates the subsequent removal of the battery cell by the removal component.

[0032] After being removed, the battery cells will be placed under a cooling component, which can be a fan arranged side by side on the conveyor belt. The rotation of the fan will cool the battery cells. Finally, the cooled battery cells will be picked up by the unloading robot 3 and sent to the next inspection process.

[0033] Example 2:

[0034] Reference Figure 1-6 An automated production line for solid-state battery cells includes an isostatic pressing method for solid-state battery cells, and further includes:

[0035] The conveyor module includes multiple sets of conveyor belts for transporting batteries and their raw materials from one production area to another.

[0036] The rolling module rolls the coated electrode to achieve the required thickness and density.

[0037] The stacking module is formed by stacking and combining the positive and negative electrode sheets and the separator after roll pressing in a certain order and manner to form the battery cell;

[0038] The feeding module includes a feeding robot 1, which moves the stacked battery cells into the isostatic pressing module 2.

[0039] The unloading module includes an unloading robot 3, which removes the battery cells processed by the isostatic pressing module 2.

[0040] The detection module includes a battery detection device 4, which is used to detect the battery cells removed by the unloading robot 3 and classify the detected battery cells as qualified or unqualified by the conveyor belt module.

[0041] The capacity testing module is a series high-voltage module used to charge qualified battery cells after testing, activate the positive and negative electrode materials of the battery, and enable the battery to have normal charge and discharge performance.

[0042] The PACK module encapsulates the battery cells after charging and discharging. Both the loading robot 1 and the unloading robot 3 are fixedly connected to clamping components. These clamping components include a mounting plate 101, cylinder 102, cylinder 103, a clamping plate 104, and a vision sensor 105. Two sets of cylinders 102 are symmetrically fixedly connected to the mounting plate 101. Two sets of cylinders 103 are fixedly connected to the telescopic ends of cylinders 102, with the telescopic ends of the two sets of cylinders 103 facing each other. The clamping plate 104 is fixedly connected to the telescopic ends of cylinders 103. The vision sensor... Device 105 is mounted on cylinder 103 and is used to detect the position of the battery cell. A compression airbag 106 is fixedly connected to the clamping surface of clamping plate 104. A connecting pipe 107 is connected to the compression airbag 106. Battery detection device 4 includes an X-ray imaging device and a pushing component. The X-ray imaging device is used to inspect the appearance of the battery cell after isostatic pressing. The pushing component is used to classify the battery cells after they have been photographed by the X-ray imaging device. Qualified cells are pushed into the conveyor belt leading to formation, and unqualified cells are pushed into the conveyor belt for subsequent separate recycling.

[0043] In the initial stage of solid-state battery cell production, the coated electrode sheets enter the rolling module.

[0044] The rolling module has the following components: a rolling mill, a thickness measuring instrument, and a tension control system. The rolling mill consists of a pair of counter-rotating rollers. By adjusting the roller spacing and rotation speed, pressure is applied to the electrode sheet for rolling. During this process, the thickness measuring instrument measures the electrode sheet thickness in real time and feeds the data back to the control system so that the rolling mill parameters can be adjusted in a timely manner to ensure that the electrode sheet reaches the precise thickness required by the design. At the same time, the tension control system controls the tension of the electrode sheet in real time during the rolling process to prevent problems such as wrinkles and breakage, and ensure that the electrode sheet meets the specified density standard. The finished electrode sheet is produced after rolling.

[0045] The wafers are transported to the next stacking process via the conveyor belt in the conveyor module.

[0046] The stacking module has the following components: a stacking machine (including an unwinding device, a web guiding device, a stacking device, and a hot pressing device), and a vision inspection system. After being rolled, the positive and negative electrode sheets and separator rolls are placed on the unwinding device of the stacking machine. During the transfer of the electrode sheets and separator, the web guiding device monitors and adjusts their positions in real time to ensure accurate transfer. Subsequently, the stacking device stacks the electrode sheets and separator in a specific order and manner to construct the battery cell structure. The vision inspection system detects the stacking position and alignment of the electrode sheets and separator in real time. Once a deviation is detected, it provides timely feedback and adjustment. After stacking is completed, the hot pressing device performs preliminary hot pressing and shaping of the cell to enhance the stability of the cell structure.

[0047] After the battery cells are shaped, they are transported by a conveyor belt module to the robotic arm for loading.

[0048] The feeding module has the following components: feeding robot 1 (including robotic arm, servo motor, and control system) and clamping assembly (including mounting plate 101, cylinder 102, cylinder 2 103, clamping plate 104, vision sensor 105, and compression airbag 106). The feeding robot 1 of the feeding module has a servo motor that receives instructions from the control system to drive the robotic arm to move. The vision sensor 105 first accurately detects the position of the stacked battery cells. Then, the two sets of cylinders 102 drive cylinder 2 103 to move to the appropriate position. Then, cylinder 2 103 extends and drives the clamping plate 104 to clamp the battery cells. When the compression airbag 106 on the clamping plate 104 contacts the battery cells, it adaptively fits the surface of the battery cells through the air pressure adjustment in the connecting pipe 107 to achieve stable clamping.

[0049] The loading robot 1 transports the battery cells to the designated position in the static pressure chamber within the isostatic pressure module 2.

[0050] The isostatic pressing module has the following components: an isostatic pressing device (including a static pressure chamber, a transformer, pressure sensors, a fixing and limiting component, a removal component, and a cooling component); the static pressure chamber of the isostatic pressing module is equipped with a fixing and limiting component. After the battery cell is placed in the designated position, the fixing and limiting component quickly fixes the battery cell to ensure its stable position during the isostatic pressing process. The transformer in the static pressure chamber starts to work, gradually increasing the pressure inside the chamber. Pressure sensors distributed in various areas of the static pressure chamber monitor the pressure value in real time and feed the data back to the control system. The control system calculates the average pressure value based on the pressure sensor signals. When the average value reaches the first preset value, the pressurization stops and the current pressure is maintained. After the pressure is maintained for a preset time period, the transformer starts to reduce the pressure in the static pressure chamber. When the pressure drops to the second preset pressure value, the removal component removes the isostatically pressed battery cell and moves it to the cooling component. The cooling component, such as a cooling fan or a coolant circulation device, starts to cool the battery cell, reducing its temperature to room temperature.

[0051] The unloading module has the same components as the loading module.

[0052] The unloading robot 3 of the unloading module has the same structure as the loading robot 1. The servo motor drives the robot arm to move to the discharge position of the isostatic pressing module 2. After the vision sensor 105 detects the position of the battery cell, the cylinder 102 and the cylinder 2 103 work together to drive the clamping plate 104 to clamp the cooled battery cell, and then transport it to the conveyor belt to deliver the battery cell to the detection module.

[0053] The testing module has the following components: battery testing device 4 (including X-ray imaging device and pushing component); after the battery cell enters the testing area with the conveyor belt, the X-ray imaging device uses X-rays to penetrate the battery cell and obtain an image of its internal structure to detect whether the battery cell has any appearance or internal defects. After the test is completed, the cylinder, push rod and other components in the pushing component perform classification operations according to the test results, pushing qualified battery cells onto the conveyor belt leading to the formation and capacity testing module, while unqualified battery cells are pushed onto the conveyor belt for subsequent separate recycling processing.

[0054] The formation and capacity testing module has the following components: charging and discharging equipment and battery management system (BMS). Qualified battery cells are transported to the formation and capacity testing module via a conveyor belt. The charging and discharging equipment provides adjustable voltage and current output and charges the battery cells using a series high-voltage method to activate the positive and negative electrode materials. The battery management system monitors the voltage, current, temperature and other parameters of the battery cells in real time during the charging and discharging process. If any parameter is abnormal, it immediately provides feedback and makes adjustments to ensure that the charging and discharging process is safe, stable and meets the process requirements, so that the battery has normal charging and discharging performance.

[0055] The PACK module has the following components: packaging equipment (including casing forming equipment, cell assembly equipment, welding equipment, and sealing equipment); the cells that have completed charging and discharging are transported to the PACK module by a conveyor belt; the casing forming equipment, such as an injection molding machine, first produces the battery casing; the cell assembly equipment assembles the cells with the casing, connecting lines, etc.; the welding equipment welds the connecting lines; and finally, the sealing equipment seals the battery to ensure the airtightness of the battery packaging, ultimately forming a usable solid-state battery product.

[0056] This invention, through the setup of a conveyor belt module, a roller pressing module, a stacking module, a feeding module, a discharging module, an isostatic pressing module 2, a detection module, a formation and capacity testing module, and a PACK module, enables automated and rapid production of battery cells, accelerating the production process. Simultaneously, during the isostatic pressing process, the use of pressure sensors prevents damage to the battery cells caused by excessive local pressure, reducing the damage rate.

[0057] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An automated production line of solid-state battery cells, characterized in that, It includes: A conveyor belt module including a plurality of conveyor belts for transporting batteries and raw materials of batteries from one production area to another production area; A rolling module for rolling the coated pole piece to achieve the required thickness and density of the pole piece; A laminating module for laminating the positive and negative pole pieces and the separator according to a certain order and manner to form the battery cell; A feeding module including a feeding manipulator (1) for moving the laminated battery cell to the isostatic pressing module (2) through the manipulator; A discharging module including a discharging manipulator (3) for moving the battery cell processed by the isostatic pressing module (2) out; A detection module including a battery detection device (4) for detecting the battery cell moved out by the discharging manipulator (3) and classifying the detected battery cell through the conveyor belt module; A formation and capacity module using series high-voltage formation for charging the qualified battery cell after detection to activate the positive and negative materials of the battery and make the battery have normal charge and discharge performance; A PACK module for packaging the battery cell after charge and discharge.

2. The automated line for solid-state battery cells of claim 1, wherein, The feeding manipulator (1) and the discharging manipulator (3) are fixedly connected with a clamping assembly, the clamping assembly includes a mounting plate (101), a cylinder one (102), a cylinder two (103), a clamping plate (104), and a vision sensor (105), two sets of the cylinder one (102) are symmetrically fixedly connected on the mounting plate (101), two sets of the cylinder two (103) are fixedly connected on the telescopic ends of the cylinder one (102), and the telescopic ends of the two sets of the cylinder two (103) are oppositely arranged, the clamping plate (104) is fixedly connected on the telescopic end of the cylinder two (103), and the vision sensor (105) is installed on the cylinder two (103) for detecting the position of the battery cell.

3. The automated line for solid-state battery cells of claim 2, wherein, The clamping surface of the clamping plate (104) is fixedly connected with a squeeze air bag (106), and the squeeze air bag (106) is connected with a connecting pipe (107).

4. The automated line for solid-state battery cells of claim 3, wherein, The battery detection device (4) includes an X-ray photographing device and a pushing assembly, the X-ray photographing device is used for detecting the appearance of the battery cell after isostatic pressing.

5. The automated line for the production of solid-state battery cells according to claim 4, characterized in that, The pushing assembly is used for classifying the battery cell after being photographed by the X-ray photographing device, the qualified one is pushed into the conveyor belt leading to the formation, and the unqualified one is pushed into the conveyor belt for subsequent separate recycling treatment.

Images