A stacking device

Abstract

This utility model discloses a stacking device for manufacturing power battery cells. The device includes a stacking table, a lifting mechanism, and multiple pressing mechanisms. The pressing mechanisms are arranged along the edge of the stacking table, and each pressing mechanism is equipped with a pressure measuring unit and a pressure regulating unit. The lifting mechanism drives the pressing blades to rise and fall, the pressure measuring unit monitors the pressure of the pressing blades on the electrode sheets in real time, and the pressure regulating unit adjusts the pressure according to a feedback closed-loop system. This device can record pressure data and bind it to the battery cells, facilitating problem traceability and improving yield. It also allows commissioning personnel to flexibly adjust the pressure according to different product requirements, enhancing adaptability and ease of operation.

Description

Technical Field

[0001] This utility model relates to the technical field of power battery cell manufacturing equipment, specifically to a stacking device. Background Technology

[0002] The stacking process of power battery cells is the core link in cell manufacturing. Its principle is to control the cyclic movement of the stacking press knife to press the cell electrode and separator downward toward the stacking table, so that they are pressed into a whole cell.

[0003] In existing equipment, the pressure exerted by the laminating blades on the electrodes during cell stacking is controlled based on a calculated pressure control value. This pressure is adjusted by regulating the air pressure of a spring cylinder using a pressure regulating valve, and all blades are adjusted synchronously using the same control value. However, due to factors such as the pressure adjustment accuracy error of the pressure regulating valve and friction in the laminating blade mechanism, there is a deviation between the calculated theoretical laminating pressure and the actual pressure exerted by the laminating blades on the electrodes. Furthermore, there are slight differences in the pressure values ​​of different laminating blades. Excessive laminating blade pressure can cause product defects such as electrode coating damage, active material detachment, increased internal resistance due to deformation of the metal current collector, and collapse of diaphragm pores. In severe cases, diaphragm perforation can lead to internal short circuits. Insufficient laminating blade pressure, on the other hand, fails to properly press the electrodes and diaphragm, resulting in loose stacked cells, excessive cell thickness leading to wrinkles, and increased interface resistance, thus reducing the charge and discharge efficiency of the cells. Additionally, relative displacement caused by insufficient pressing of the electrodes and diaphragm can also lead to poor cell alignment.

[0004] Therefore, precise monitoring of the pressing pressure of the lamination device is of positive significance for improving the yield of laminated cells. Utility Model Content

[0005] Based on the above description, this utility model provides a stacking device to solve the problem of pressure control accuracy in battery cell stacking devices and improve the yield of stacked battery cells.

[0006] To address the technical problems raised in the background art, this utility model provides a stacking device, including a stacking table, a lifting mechanism, and multiple pressing mechanisms. The lifting mechanism is arranged adjacent to the stacking table, and the multiple pressing mechanisms are mounted on the lifting mechanism and distributed along the edges of the stacking table. Each pressing mechanism is equipped with a pressure measuring unit and a pressure adjusting unit, wherein: The lifting mechanism is used to drive the pressing mechanism to move vertically closer to or away from the stacking table; The pressure measuring unit is used to monitor the pressure value of the pressing mechanism relative to the stacking table; The pressure regulating unit is used to adjust the pressure value of the corresponding pressing mechanism relative to the stacking table according to the measured pressure value.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Preferably, the lifting mechanism includes a lifting drive module and a lifting platform. The lifting drive module is vertically arranged, and its movable end is connected to the lifting platform. Multiple pressing mechanisms are arranged on the lifting platform.

[0009] Preferably, the pressure regulating unit includes a pressure regulating switch and a telescopic cylinder. The pressure regulating switch is connected to the control terminal of the telescopic cylinder. The telescopic cylinder is vertically arranged. The fixed end of the telescopic cylinder is installed on the movable end of the lifting mechanism. The movable end of the telescopic cylinder, the pressure measuring unit, and the pressing mechanism are sequentially fixedly connected. The end of the pressing mechanism extends toward the stacking table.

[0010] Preferably, the pressure regulating unit further includes a limiting platform, which cooperates with the movable end of the telescopic cylinder when the pressing mechanism moves toward the stacking platform to its limit position.

[0011] Preferably, the telescopic cylinder is an electric cylinder, a hydraulic cylinder, or a pneumatic cylinder.

[0012] Preferably, the lifting mechanism is further provided with a transverse drive mechanism, and the plurality of pressing mechanisms include a first pressing mechanism and a second pressing mechanism. The first pressing mechanism and the second pressing mechanism are arranged in pairs on the transverse drive mechanism, and the stacking table is arranged between the first pressing mechanism and the second pressing mechanism. When the transverse drive mechanism is running, the first pressing mechanism and the second pressing mechanism synchronously approach or move away from the stacking table in the transverse direction.

[0013] Preferably, the transverse drive mechanism includes a slide rail arranged transversely and a synchronous belt drive mechanism. The slide rail is mounted on the lifting platform. The first pressing mechanism and the second pressing mechanism are slidably connected to the slide rail, and the first pressing mechanism and the second pressing mechanism are respectively connected to the linear motion part of the synchronous belt drive mechanism. When the synchronous belt drive mechanism is running, the linear movement directions of the first pressing mechanism and the second pressing mechanism are opposite.

[0014] Preferably, the synchronous belt drive mechanism includes a drive pulley, an idler pulley, a synchronous belt, and a drive motor. The drive pulley and the idler pulley are arranged along the length of the slide rail. The synchronous belt is sleeved on the outer periphery of the drive pulley and the idler pulley and tensioned. The drive motor is connected to the drive pulley for transmission. The first pressing mechanism and the second pressing mechanism are respectively arranged on two parallel sections of the synchronous belt between the drive pulley and the idler pulley.

[0015] Preferably, the timing belt has multiple teeth, which are perpendicular to the length direction of the slide rail, and the first pressing mechanism and the second pressing mechanism are connected to the teeth on the timing belt through toothed connectors.

[0016] Preferably, the synchronous belt drive mechanism further includes an idler adjustment seat, which is fixedly installed on the lifting platform. The idler adjustment seat has an elongated hole arranged along the length of the synchronous belt. The shaft end of the idler is rotatably installed in the elongated hole by a tensioning shaft screw. The lateral installation position of the tensioning shaft screw in the elongated hole is adjustable.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: This invention provides a stacking device that uses a lifting mechanism to control the raising and lowering of multiple pressing mechanisms to stack and press the battery cell electrodes on a stacking table. Each pressing mechanism is equipped with a pressure measuring unit (e.g., a pressure sensor) to provide real-time feedback on the pressing pressure value, and a pressure regulating unit adjusts the pressure of the corresponding pressing mechanism in a closed loop. During the stacking process, pressure data is monitored and recorded and correlated with the processed battery cells. This allows for data tracing and analysis of problematic cells, reducing the production line defect rate. Production and debugging operators can intuitively adjust the pressing pressure using the pressure regulating unit (e.g., a spring cylinder) based on the real-time monitoring data from the pressure measuring unit to meet the personalized requirements of different product models. Attached Figure Description

[0018] Figure 1 A schematic diagram of the stacking blade driving device and the overall structure of the stacking device provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the internal structure of the transverse traverse drive mechanism from a certain perspective, provided in an embodiment of the present utility model. Figure 3 A schematic diagram of the internal structure of a transverse traverse drive mechanism from another perspective provided in this embodiment of the utility model; Figure 4 A top view of the stacking blade driving device and the stacking device provided in this embodiment of the utility model; Figure 5 A partially enlarged structural diagram of the stacking blade driving device and the stacking device provided in the embodiments of this utility model; The attached diagram lists the components represented by each number as follows: 1. Stacking table; 2. Horizontal drive mechanism; 201. Slide rail; 202. Drive wheel; 203. Idler wheel; 204. Synchronous belt; 205. Gear; 206. Tensioning shaft screw; 207. Toothed connector; 208. Idler wheel connecting seat; 208a. Elongated hole; 3. First pressing mechanism; 301. First telescopic cylinder; 302. Top plate of first telescopic cylinder; 303. First pressing module; 4. Second pressing mechanism; 401. Second telescopic cylinder; 402. Top plate of second telescopic cylinder; 403. Second pressing module; 5. Motor reducer; 6. Pressure measuring unit; 7. Limiting platform; 8. Lifting mechanism; 801. Lifting drive module; 802. Lifting platform; 9. Frame. Detailed Implementation

[0019] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0021] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "under" or "below" of other elements or features will be oriented "over" of other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0022] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0023] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0024] like Figures 1-5 As shown, this embodiment of the present invention provides a stacking device, which includes a stacking table 1, a lifting mechanism 8, and multiple pressing mechanisms. Both the stacking table 1 and the lifting mechanism 8 can be mounted on a frame 9 to adapt to process requirements. The lifting mechanism 8 is arranged adjacent to the stacking table 1, and the multiple pressing mechanisms are mounted on the lifting mechanism 8 and distributed along the edges of the stacking table 1. For example, the multiple pressing mechanisms are arranged around the stacking table 1. Each pressing mechanism is equipped with a pressure measuring unit 6 and a pressure adjusting unit. Wherein: The lifting mechanism 8 is used to drive the pressing mechanism to move vertically closer to or away from the stacking table 1; The pressure measuring unit 6 is preferably implemented using a pressure sensor with digital display function, which is used to monitor the pressure value of its corresponding pressing mechanism relative to the stacking table 1. The pressure regulating unit is used to adjust the pressure value of the corresponding pressing mechanism relative to the stacking table 1 according to the measured pressure value.

[0025] Understandably, this embodiment provides a stacking device to address the deficiencies pointed out in the background art. A battery cell workpiece to be processed is placed on a stacking table 1. After the pressure knives of multiple pressure knives are aligned with and positioned on the battery cell workpiece, the device can control the lifting and lowering actions of these multiple pressure knives via a lifting mechanism 8, thereby stacking and pressing the electrodes and diaphragms of the battery cell workpiece on the stacking table 1. A pressure measuring unit 6 (e.g., a pressure sensor) is installed on each stacking pressure knives to provide real-time feedback on the pressure value of the pressure knives, and the pressure of the corresponding pressure knives is adjusted in a closed loop through a pressure regulating unit. During the battery cell stacking production process, pressure data is monitored and recorded and correlated with the processed battery cells. Subsequently, data traceability and problem analysis can be performed on problematic battery cells to reduce the production line defect rate. Production debugging operators can intuitively adjust the pressure of the pressure knives through the pressure regulating unit (e.g., a spring cylinder) using the real-time monitoring data from the pressure measuring unit 6 to meet the personalized needs of different product models.

[0026] In one possible embodiment, such as Figure 1 and Figure 3As shown, the lifting mechanism 8 includes a lifting drive module 801 and a lifting platform 802. The lifting drive module 801 is vertically arranged, and the movable end of the lifting drive module 801 is connected to the lifting platform 802. Multiple pressing mechanisms are arranged on the lifting platform 802.

[0027] It is understandable that the lifting platform 802 carries multiple pressing mechanisms, and the lifting drive module 801 drives the lifting platform 802 to move up and down. For example, when the lifting drive module 801 drives the lifting platform 802 to descend, the pressing mechanism presses the battery cell workpiece placed on the stacking table 1; when the lifting platform 802 is driven to rise, the pressing mechanism releases the battery cell workpiece. The lifting drive module 801 can be implemented using a motor-driven lead screw structure.

[0028] In one possible embodiment, the lifting mechanism 8 is further provided with a transverse drive mechanism 2, and the plurality of pressing mechanisms include at least one first pressing mechanism 3 and at least one second pressing mechanism 4. The first pressing mechanism 3 and the second pressing mechanism 4 are arranged in pairs on the transverse drive mechanism 2. It is understood that the specific number of the first pressing mechanism 3 and the second pressing mechanism 4 is determined according to the actual type of battery cell workpiece being processed, and is not limited in this embodiment.

[0029] The stacking stage 1 is positioned between the paired first pressing mechanism 3 and second pressing mechanism 4. When the transverse drive mechanism 2 operates, the first pressing mechanism 3 and the second pressing mechanism 4 synchronously approach or move away from the stacking stage 1 in the transverse direction.

[0030] In this embodiment, the transverse drive mechanism 2 synchronously drives the first pressing mechanism 3 and the second pressing mechanism 4 to achieve the alternating "forward → backward" reciprocating cycle of the pressing knife relative to the stacking table 1. Combined with the lifting drive of the lifting mechanism 8, the first pressing mechanism 3 and the second pressing mechanism 4 perform "downward → upward" actions after being positioned above the stacking table 1, thereby completing the "forward → downward → upward → backward" cycle of the power battery stacking process and completing the cyclic stacking process of the battery cell workpiece.

[0031] In this embodiment, the lateral movement drive mechanism 2 ensures the straightness of the lateral movement of the pressing mechanism. By moving the mounting positions of the first pressing mechanism 3 and the second pressing mechanism 4 on the pulley drive mechanism 2 or adjusting their linear movement stroke, it can accommodate battery cells of different lengths. Compared to the traditional lead screw drive structure, the device structure of this embodiment is simpler, and debugging and maintenance are easier.

[0032] Figures 2-5 The internal structure of the housing of one of the pulley drive mechanisms 2 of the stacking device is shown, along with a further enlarged view of the structure.

[0033] The forward and backward reciprocating motion of existing laminating blades is generally driven by a double-headed lead screw mechanism. The double-headed lead screw mechanism requires extremely high machining accuracy, resulting in long machining cycles, high costs, and the need for regular lubrication and maintenance; moreover, its installation accuracy requirements are high, making on-site maintenance, installation, and debugging difficult, requiring highly skilled installation and debugging personnel, and the debugging time is long, causing long-term equipment downtime and affecting equipment production capacity.

[0034] In one possible embodiment, the lateral movement drive mechanism 2 includes a slide rail 201 arranged laterally and a synchronous belt drive mechanism. The slide rail 201 is mounted on the lifting platform 802 to constrain the lateral sliding path of the pressing mechanism. The first pressing mechanism 3 and the second pressing mechanism 4 are slidably connected to the slide rail 201 via sliding connectors, and the first pressing mechanism 3 and the second pressing mechanism 4 are respectively connected to the linear motion part of the synchronous belt drive mechanism. When the synchronous belt drive mechanism operates, it drives the first pressing mechanism 3 and the second pressing mechanism 4 to slide along the slide rail 201, and the linear movement directions of the first pressing mechanism 3 and the second pressing mechanism 4 are opposite. That is, the first pressing mechanism 3 and the second pressing mechanism 4 are respectively arranged on both sides of the stacking table 1, and they synchronously perform linear movements toward the stacking table 1 or synchronously perform linear movements away from the stacking table 1.

[0035] Due to the flexibility of synchronous belt drive mechanisms, the space requirements for equipment during maintenance are also lower, which greatly reduces the cost of the device.

[0036] More specifically, such as Figures 2-5 As shown, the synchronous belt drive mechanism includes a drive pulley 202, an idler pulley 203, a synchronous belt 204, and a drive motor (not shown in the figure). The drive pulley 202 and the idler pulley 203 are arranged one-to-one on both sides of the stacking table 1 along the length of the slide rail 201. The central axis of the drive pulley 202 is rotatably mounted on the lifting platform 802, and the central axis of the idler pulley 203 is rotatably fixed by a tensioning shaft screw 206 with an adjustable lateral position. The synchronous belt 204 is sleeved on the outer periphery of the drive pulley 202 and the idler pulley 203 and tensioned. The drive motor is connected to the drive pulley 202 via a transmission structure. The first pressing mechanism 3 and the second pressing mechanism 4 are arranged one-to-one on the two parallel synchronous belts between the drive pulley 202 and the idler pulley 203.

[0037] After the synchronous belt 204 is tensioned, two parallel segments of the synchronous belt 204 are formed between the drive pulley 202 and the idler pulley 203. The first pressing mechanism 3 and the second pressing mechanism 4 are respectively arranged on the two parallel segments of the synchronous belt 204 between the drive pulley 202 and the idler pulley 203. Since the two parallel segments of the synchronous belt 204 move linearly in opposite directions, they can sequentially drive the first pressing mechanism 3 and the second pressing mechanism 4 to move linearly in opposite directions.

[0038] The drive motor is connected to the motor reducer 5 via a transmission shaft, and the motor reducer 5 is connected to the drive wheel 202. The motor reducer 5 enables the drive motor to reduce the speed of the drive wheel 202. The transmission shaft can change the installation direction of the drive motor, allowing the device to be installed in existing spaces.

[0039] During commissioning, the tension of the timing belt 204 can be adjusted by adjusting the lateral position of the tensioning shaft screw 206. For later maintenance, the idler pulley 203 can be removed by disassembling the tensioning shaft screw 206, allowing for quick disassembly and assembly of the flexible timing belt drive mechanism without requiring a large amount of space.

[0040] In one possible embodiment, such as Figure 2 as well as Figure 5 As shown, the synchronous belt 204 is provided with multiple teeth 205, which are perpendicular to the length direction of the slide rail 201 (e.g., the vertical direction shown in the figure). The first pressing mechanism 3 and the second pressing mechanism 4 are connected to the teeth 205 on the synchronous belt 204 through toothed connectors 207. When the teeth 205 on the synchronous belt 204 move with the synchronous belt 204, the meshing action between the toothed connectors 207 and the teeth 205 drives the toothed connectors 207 and their attached first pressing mechanism 3 / second pressing mechanism 4 to move linearly.

[0041] It is worth noting that the schematic diagram in this embodiment only shows a small number of teeth 205 for principle illustration. In actual application scenarios, a large number of teeth 205 are provided on the synchronous belt 204. The meshing position between the toothed connector 207 and the teeth 205 can be adjusted to adapt to the stacking process of battery cells of various sizes.

[0042] To achieve precise lateral position adjustment of the idler pulley 203 and enhance the adaptability of the synchronous belt drive mechanism to fit a wider range of installation spaces, the synchronous belt drive mechanism also includes an idler pulley adjustment seat 208. The idler pulley adjustment seat 208 is fixedly installed on the lifting platform 802. The idler pulley adjustment seat 208 has an elongated hole 208a arranged along the length of the synchronous belt. The shaft end of the idler pulley 203 is rotatably installed in the elongated hole 208a by a tensioning shaft screw 206. The lateral installation position of the tensioning shaft screw 206 in the elongated hole 208a is adjustable.

[0043] In one possible embodiment, such as Figure 2 and Figure 4As shown, each of the first pressing mechanism 3 and the second pressing mechanism 4 is equipped with a pressure regulating unit. Each pressure regulating unit includes a pressure regulating switch and a telescopic cylinder. The pressure regulating switch is connected to the control end of the telescopic cylinder, which is vertically arranged. The fixed end of the telescopic cylinder is installed on the movable end of the lifting mechanism 8. The movable end of the telescopic cylinder, the pressure measuring unit 6, and the pressing mechanism are sequentially and fixedly connected. The end of the pressing mechanism extends toward the stacking table 1.

[0044] It is understood that the pressure regulating unit is located between the pressing mechanism and the lifting platform 802, and each pressing mechanism is equipped with a corresponding pressure regulating unit to achieve independent pressure adjustment of each pressing mechanism. The pressure adjustment amount of the pressing mechanism is calculated based on the real-time pressure value measured by the pressure measuring unit 6. Then, the on / off state or opening degree of the pressure regulating switch is controlled according to the pressure adjustment amount to adjust the extension / retraction amount of the telescopic cylinder, thereby controlling the precise adjustment of the pressure of the pressing tool relative to the stacking platform 1. The telescopic cylinder can be implemented using an electric cylinder, hydraulic cylinder, or pneumatic cylinder. For example, in this embodiment, a spring-loaded pneumatic cylinder is used as the telescopic cylinder, and a pressure regulating valve is used as the pressure regulating switch. The extension / retraction amount of the spring-loaded pneumatic cylinder is controlled by the pressure regulating valve to achieve real-time adjustment of the pressing tool pressure.

[0045] More specifically, such as Figure 2 , Figure 3 , Figure 5 As shown, the first pressing mechanism 3 includes a first pressing module 303, and the corresponding voltage regulating unit is a first telescopic cylinder 301 and a first telescopic cylinder top plate 302. The first telescopic cylinder 301 is vertically arranged, and the first telescopic cylinder top plate 302 is fixedly arranged on the telescopic end of the first telescopic cylinder 301. The first pressing module 303 is mounted on the first telescopic cylinder top plate 302. When the first telescopic cylinder 301 extends or retracts, the first pressing module 303 is driven to move vertically through the first telescopic cylinder top plate 302, thereby realizing the pressing and releasing action of the battery cell. Similarly, the second pressing mechanism 4 includes a second pressing module 403, and the corresponding voltage regulating unit is a second telescopic cylinder 401 and a second telescopic cylinder top plate 402. The second telescopic cylinder 401 is vertically arranged, and the second telescopic cylinder top plate 402 is fixedly arranged on the telescopic end of the second telescopic cylinder 401. The second pressing module 403 is mounted on the second telescopic cylinder top plate 402. When the second telescopic cylinder 401 extends or retracts, the second pressing module 403 moves vertically through the top plate 402 of the second telescopic cylinder, thereby realizing the pressing and releasing action of the battery cell.

[0046] In one possible implementation, to prevent damage to the battery cell caused by abnormal operation of the telescopic cylinder, the voltage regulating unit further includes a limiting platform 7. The limiting platform 7 can be fixedly mounted on the lifting platform 802 or fixedly connected to the side of the stacking platform 1. When the pressing module in the first pressing mechanism 3 / second pressing mechanism 4 moves toward the stacking platform 1 to a preset limit position, the limiting platform 7 limits the movable end of the telescopic cylinder, for example, by pressing the top plate 302 of the first telescopic cylinder / the top plate 402 of the second telescopic cylinder against it to prevent it from continuing to press down and causing damage to the battery cell.

[0047] like Figures 1-5 As shown, the pressure measuring unit 6 is disposed between the top plate 302 of the first telescopic cylinder and the first pressing module 303, or between the top plate 402 of the second telescopic cylinder and the second pressing module 403, so as to realize the accurate measurement of the pressing pressure value.

[0048] When installing the pressure measuring unit 6, the pressure sensor can be fixed between the top plate 302 of the first telescopic cylinder and the first pressing module 303, or between the top plate 402 of the second telescopic cylinder and the second pressing module 403, using screws and positioning pins. By adjusting the air pressure of the pressure regulating valve to control the extension and retraction stroke of the telescopic cylinder, the pressure sensor can accurately display the actual pressure value pressed by the pressing module onto the cell electrode. During cell stacking, the pressure sensor provides real-time feedback and records the pressing pressure value, and adjusts the extension and retraction of the corresponding telescopic cylinder to achieve closed-loop pressure regulation of the pressing module during cell electrode stacking.

[0049] The pressure monitoring unit 6 facilitates individual adjustments based on the actual pressure values ​​of each pressing module during equipment commissioning, improving the product yield of the cell stacking process. By placing the pressure monitoring unit 6 between each pressing module and the top plate of the telescopic cylinder, the system also solves the cell quality problems caused by the inability to visually display the actual pressing pressure during cell stacking and by inaccurate pressing pressure values ​​damaging the electrodes and separators. This embodiment improves the overall quality and yield of the cells, reduces the potential risk of low charging and discharging efficiency, short circuits, and fires caused by electrode and separator damage, resulting in significant economic benefits.

[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stacking device, characterized in that, It includes a stacking table (1), a lifting mechanism (8), and multiple pressing mechanisms. The lifting mechanism (8) is arranged adjacent to the stacking table (1). The multiple pressing mechanisms are installed on the lifting mechanism (8) and are distributed along the edges of the stacking table (1). Each pressing mechanism is provided with a pressure measuring unit (6) and a pressure adjusting unit, wherein: The lifting mechanism (8) is used to drive the pressing mechanism to move vertically closer to or away from the stacking table (1). The pressure measuring unit (6) is used to monitor the pressure value of the pressing mechanism relative to the stacking table (1); The pressure regulating unit is used to adjust the pressure value of the corresponding pressing mechanism relative to the stacking table (1) according to the measured pressure value.

2. The stacking device according to claim 1, characterized in that, The lifting mechanism (8) includes a lifting drive module (801) and a lifting platform (802). The lifting drive module (801) is vertically arranged, and the movable end of the lifting drive module (801) is connected to the lifting platform (802). Multiple pressing mechanisms are arranged on the lifting platform (802).

3. The stacking device according to claim 2, characterized in that, The pressure regulating unit includes a pressure regulating switch and a telescopic cylinder. The pressure regulating switch is connected to the control end of the telescopic cylinder. The telescopic cylinder is set vertically. The fixed end of the telescopic cylinder is installed on the movable end of the lifting mechanism (8). The movable end of the telescopic cylinder, the pressure measuring unit (6), and the pressing mechanism are fixedly connected in sequence. The end of the pressing mechanism extends toward the stacking table (1).

4. The stacking device according to claim 3, characterized in that, The pressure regulating unit also includes a limiting platform (7). When the pressing mechanism moves toward the stacking platform (1) to the limit position, the limiting platform (7) cooperates with the movable end of the telescopic cylinder.

5. A stacking device according to claim 3, characterized in that, The telescopic cylinder can be an electric cylinder, a hydraulic cylinder, or a pneumatic cylinder.

6. A stacking device according to any one of claims 2 to 5, characterized in that, The lifting mechanism (8) is also provided with a transverse drive mechanism (2), and multiple pressing mechanisms include a first pressing mechanism (3) and a second pressing mechanism (4). The first pressing mechanism (3) and the second pressing mechanism (4) are arranged in pairs on the transverse drive mechanism (2), and the stacking table (1) is arranged between the first pressing mechanism (3) and the second pressing mechanism (4). When the transverse drive mechanism (2) is running, the first pressing mechanism (3) and the second pressing mechanism (4) move towards or away from the stacking table (1) in a transverse direction.

7. A stacking device according to claim 6, characterized in that, The transverse drive mechanism (2) includes a slide rail (201) arranged in the transverse direction and a synchronous belt drive mechanism. The slide rail (201) is mounted on the lifting platform (802). The first pressing mechanism (3) and the second pressing mechanism (4) are slidably connected to the slide rail (201) respectively, and the first pressing mechanism (3) and the second pressing mechanism (4) are respectively connected to the linear motion part of the synchronous belt drive mechanism. When the synchronous belt drive mechanism is running, the linear movement directions of the first pressing mechanism (3) and the second pressing mechanism (4) are opposite.

8. A stacking device according to claim 7, characterized in that, The synchronous belt drive mechanism includes a drive pulley (202), an idler pulley (203), a synchronous belt (204), and a drive motor. The drive pulley (202) and the idler pulley (203) are arranged along the length of the slide rail (201). The synchronous belt (204) is sleeved on the outer periphery of the drive pulley (202) and the idler pulley (203) and tensioned. The drive motor is connected to the drive pulley (202) in a drive connection. The first pressing mechanism (3) and the second pressing mechanism (4) are respectively arranged on the two parallel synchronous belts between the drive pulley (202) and the idler pulley (203).

9. A stacking device according to claim 8, characterized in that, The synchronous belt (204) is provided with a plurality of teeth (205), the teeth (205) being perpendicular to the length direction of the slide rail (201), and the first pressing mechanism (3) and the second pressing mechanism (4) being meshed with the teeth (205) on the synchronous belt (204) through toothed connectors (207).

10. A stacking device according to claim 8 or 9, characterized in that, The synchronous belt drive mechanism also includes an idler adjustment seat (208), which is fixedly installed on the lifting platform (802). The idler adjustment seat (208) is provided with an elongated hole (208a) arranged along the length of the synchronous belt. The shaft end of the idler (203) is rotatably installed in the elongated hole (208a) by a tensioning shaft screw (206). The lateral installation position of the tensioning shaft screw (206) in the elongated hole (208a) is adjustable.

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