Battery liquid injection equipment

Abstract

The present application relates to the technical field of battery production, and particularly relates to a battery liquid injection equipment. The battery liquid injection equipment comprises a rotating disc mechanism, a lifting mechanism, a film supporting mechanism, a liquid injection mechanism and a residual liquid recovery mechanism. The rotating disc mechanism is provided with a jig for carrying a plurality of batteries, and the jig can rotate to a liquid injection station under the drive of the rotating disc mechanism. The lifting mechanism is arranged at the liquid injection station. The film supporting mechanism is drivingly connected with the lifting mechanism, and is configured to adsorb and open the aluminum plastic film to form a liquid injection port. The liquid injection mechanism is drivingly connected with the lifting mechanism, and can descend and pass through the liquid injection port to inject liquid after the film supporting mechanism opens the aluminum plastic film. The residual liquid recovery mechanism is drivingly connected with the lifting mechanism, and can move to the position directly below the liquid injection mechanism to receive the residual electrolyte after the liquid injection mechanism completes the liquid injection. The battery liquid injection equipment can not only improve the production efficiency of the battery, but also avoid the electrolyte from dropping onto the surface of the jig, protect the production environment and reduce the maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing technology, and in particular to a battery electrolyte filling device. Background Technology

[0002] With the rapid development of the new energy industry, pouch lithium-ion batteries have been widely used in electric vehicles, energy storage systems, and consumer electronics due to their advantages such as high energy density, good safety, and flexible design. In the manufacturing process of pouch lithium-ion batteries, the electrolyte injection process is a crucial step in injecting electrolyte into the battery, directly affecting the battery's electrochemical performance and safety.

[0003] Traditional electrolyte injection devices have a low degree of automation, usually requiring manual operation, making it difficult to guarantee production consistency and stability. Furthermore, their slow production cycle cannot meet the high-efficiency requirements of modern production lines. Additionally, after the injection operation is completed, residual electrolyte at the injection nozzle easily drips onto the fixture surface, wasting electrolyte and contaminating the production fixture and environment, increasing subsequent cleaning and maintenance costs.

[0004] Therefore, there is an urgent need to design a battery liquid injection device to solve the above technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a battery electrolyte injection device that can not only improve battery production efficiency, but also reduce or avoid electrolyte dripping onto the fixture surface, protect the production environment, and reduce maintenance costs.

[0006] To achieve this objective, the present invention adopts the following technical solution: This invention provides a battery electrolyte filling device, comprising: A turntable mechanism is provided with a fixture for carrying multiple batteries, which can be rotated to the liquid injection station under the drive of the turntable mechanism; A lifting mechanism is provided at the liquid injection station; A membrane support mechanism is drivenly connected to the lifting mechanism, and the membrane support mechanism is configured to adsorb and expand the aluminum-plastic membrane of the battery to form an injection port; The liquid injection mechanism is driven and connected to the lifting mechanism. After the film-supporting mechanism opens the aluminum-plastic film, the liquid injection mechanism descends and passes through the liquid injection port to inject liquid. The residual liquid recovery mechanism is driven and connected to the lifting mechanism. After the liquid injection mechanism completes the liquid injection, the residual liquid recovery mechanism can move to directly below the liquid injection mechanism to receive the residual electrolyte.

[0007] As an optional technical solution for battery liquid filling equipment, the battery liquid filling equipment includes a mounting frame, and the lifting mechanism includes a lifting plate, a first driving member, and a first slide rail; the first slide rail is disposed on the mounting frame, the lifting plate is slidably engaged with the first slide rail, the first driving member is drivenly connected to the lifting plate to drive the lifting plate to move up and down, and the film supporting mechanism, the liquid filling mechanism, and the residual liquid recovery mechanism are all disposed on the lifting plate.

[0008] As an optional technical solution for battery liquid injection equipment, the film support mechanism includes a second driving member and two suction cup assemblies. The two suction cup assemblies are arranged opposite to each other. The second driving member is driven to drive the two suction cup assemblies to move closer or further apart. The suction cup assemblies are configured to adsorb the surface of the aluminum-plastic film.

[0009] As an optional technical solution for battery liquid injection equipment, the membrane support mechanism further includes a connecting plate, a second slide rail and a transmission assembly. One side of the connecting plate is connected to the lifting mechanism, and the other side of the connecting plate is provided with the second slide rail, which extends horizontally. Both suction cup assemblies are slidably engaged with the second slide rail. The transmission component is disposed on the side of the connecting plate facing the suction cup assembly, and the second driving component is disposed on the side of the connecting plate away from the suction cup assembly; the transmission component is drivenly connected to the output end of the second driving component, and the suction cup assembly is fixedly connected to the transmission component.

[0010] As an optional technical solution for battery liquid filling equipment, the transmission assembly includes a gear and two racks, each suction cup assembly includes a suction cup and a first mounting plate, the suction cup is disposed on the first mounting plate, and the suction cup is used to adsorb the surface of the aluminum-plastic film; one side of the first mounting plate is slidably engaged with the second slide rail, and the other side is fixedly connected to one end of the corresponding rack; Both racks mesh with the gear, and the output end of the second drive unit is connected to the gear drive to drive the gear to rotate forward or backward and drive the two racks to move towards or away from each other, so that the suction cup on the first mounting plate can adsorb the surface of the aluminum-plastic film or expand the aluminum-plastic film to form the injection port.

[0011] As an optional technical solution for battery liquid filling equipment, the membrane support mechanism further includes a limiting component, which includes a limiting block and at least two limiting switches. The limiting block is disposed on the first mounting plate, and the limiting switches are disposed on the connecting plate. When the limiting block moves with the first mounting plate and blocks the optical path of the limiting switch, the second driving member stops driving.

[0012] As an optional technical solution for battery liquid filling equipment, the side of the connecting plate is provided with a sliding groove, the limit switch slides in cooperation with the sliding groove, and a fastener is provided between the limit switch and the connecting plate. The limit switch can slide along the sliding groove to adjust the installation position and is locked and fixed by the fastener.

[0013] As an optional technical solution for battery liquid filling equipment, the liquid filling mechanism includes a third driving member, a third slide rail and a liquid filling nozzle assembly. The third slide rail is vertically disposed on the lifting plate, the liquid filling nozzle assembly is slidably engaged with the third slide rail, and the third driving member is drivenly connected to the liquid filling nozzle assembly to drive the liquid filling nozzle assembly to move up and down.

[0014] As an optional technical solution for battery liquid filling equipment, the liquid filling nozzle assembly includes a second mounting plate and a plurality of liquid filling nozzles. The driving end of the third driving member is drivenly connected to one side of the second mounting plate. The plurality of liquid filling nozzles are spaced apart on the other side of the second mounting plate along the arrangement direction of the batteries on the fixture. Each liquid filling nozzle corresponds one-to-one with a battery on the fixture.

[0015] As an optional technical solution for battery liquid filling equipment, the residual liquid recovery mechanism includes a fourth driving component and a residual liquid collection shell. The fourth driving component is disposed at the lower end of the lifting plate, and the output end of the fourth driving component is driven to the residual liquid collection shell to drive the residual liquid collection shell to move horizontally to directly below the liquid filling nozzle or return to the initial position.

[0016] As an optional technical solution for battery liquid filling equipment, the residual liquid collection shell is a trough-shaped structure with an open top. The interior of the residual liquid collection shell is provided with a buffer guide layer, and the bottom of the residual liquid collection shell is provided with a drain port. The drain port is connected to an external residual liquid collection device through a hose, and a filter screen is provided at the drain port.

[0017] The beneficial effects of the present invention include at least the following: This invention provides a battery electrolyte filling device, which includes a turntable mechanism, a lifting mechanism, a membrane support mechanism, an electrolyte filling mechanism, and a residual electrolyte recovery mechanism. The turntable mechanism is equipped with a fixture for supporting multiple batteries, which can rotate to the electrolyte filling station under the drive of the turntable mechanism. The lifting mechanism is located at the electrolyte filling station. The membrane support mechanism is driven and connected to the lifting mechanism, and is configured to adsorb and expand an aluminum-plastic film to form an electrolyte filling port. The electrolyte filling mechanism is driven and connected to the lifting mechanism, and can descend and pass through the electrolyte filling port after the membrane support mechanism expands the aluminum-plastic film to fill the battery. The residual electrolyte recovery mechanism is driven and connected to the lifting mechanism, and can move directly below the electrolyte filling mechanism after the electrolyte filling mechanism completes the filling process to collect any remaining electrolyte.

[0018] The above describes how a turntable mechanism automates the switching of the fixture used to hold the batteries, replacing manual battery transfer, reducing human intervention, and increasing the automation level of the electrolyte injection process. The lifting mechanism provides a unified lifting base for the film-supporting mechanism, the electrolyte injection mechanism, and the residual electrolyte recovery mechanism, preventing injection failures caused by misalignment. The film-supporting mechanism actively attracts and expands the aluminum-plastic film to form a regular injection port, replacing manual operation, improving automation, ensuring the outlet of the electrolyte injection mechanism accurately extends into the battery, improving injection accuracy, and preventing electrolyte overflow. After injection, the residual electrolyte recovery mechanism promptly collects any remaining electrolyte, preventing electrolyte dripping onto the fixture surface and causing contamination, protecting the production environment, and reducing subsequent cleaning and maintenance costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the battery electrolyte filling device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the membrane support mechanism provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the liquid injection mechanism and residual liquid recovery mechanism provided in the embodiments of the present invention.

[0021] Figure Labels 100. Aluminum-plastic film; 10. Turntable mechanism; 11. Fixture; 12. Large turntable; 20. Lifting mechanism; 21. Lifting plate; 22. First driving component; 23. First slide rail; 30. Film support mechanism; 31. Second drive component; 32. Suction cup assembly; 321. Suction cup; 322. First mounting plate; 33. Connecting plate; 34. Second slide rail; 35. Transmission assembly; 351. Gear; 352. Rack; 36. Limiting assembly; 361. Limiting block; 362. Limit switch; 37. Slide groove; 40. Injection mechanism; 41. Third drive component; 42. Third slide rail; 43. Injection nozzle assembly; 431. Second mounting plate; 432. Injection nozzle; 50. Residual liquid recovery mechanism; 51. Fourth drive component; 52. Residual liquid collection shell; 60. Mounting bracket. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] This embodiment provides a battery electrolyte injection device that can not only improve battery production efficiency, but also reduce or avoid electrolyte dripping onto the fixture surface, protect the production environment, and reduce maintenance costs.

[0031] like Figures 1-3 As shown, the battery electrolyte filling equipment mainly includes a turntable mechanism 10, a lifting mechanism 20, a membrane support mechanism 30, an electrolyte filling mechanism 40, and a residual electrolyte recovery mechanism 50. The turntable mechanism 10 is equipped with a fixture 11 for supporting multiple batteries, which can rotate to the electrolyte filling station under the drive of the turntable mechanism 10. The lifting mechanism 20 is located at the electrolyte filling station. The membrane support mechanism 30 is driven to the lifting mechanism 20 and is configured to adsorb and expand the aluminum-plastic film 100 to form an electrolyte filling port. The electrolyte filling mechanism 40 is driven to the lifting mechanism 20 and can descend and pass through the electrolyte filling port after the membrane support mechanism 30 expands the aluminum-plastic film 100 to perform electrolyte filling. The residual electrolyte recovery mechanism 50 is driven to the lifting mechanism 20 and can move directly below the electrolyte filling mechanism 40 after the electrolyte filling is completed to receive residual electrolyte.

[0032] Based on the above design, in this embodiment, the turntable mechanism 10 is used to automate the switching of the workstation of the fixture 11 used to carry the battery, replacing the manual transfer of batteries, reducing manual intervention, and improving the automation level of the electrolyte injection process. The lifting mechanism 20 provides a unified lifting base for the film support mechanism 30, the electrolyte injection mechanism 40, and the residual electrolyte recovery mechanism 50, avoiding electrolyte injection failure caused by misalignment. The film support mechanism 30 can actively absorb and expand the aluminum-plastic film 100 to form a regular electrolyte injection port, replacing manual operation, improving the automation level, ensuring that the liquid outlet of the electrolyte injection mechanism 40 can accurately extend into the battery, improving the accuracy of electrolyte injection, and preventing electrolyte overflow. After the electrolyte injection is completed, the residual electrolyte recovery mechanism 50 promptly receives the residual electrolyte, thereby preventing electrolyte from dripping onto the surface of the fixture 11 and causing pollution, protecting the production environment, and reducing the maintenance cost of subsequent cleaning.

[0033] like Figures 1-3 As shown, in this embodiment, the battery liquid injection device includes a mounting frame 60, and the lifting mechanism 20 includes a lifting plate 21, a first driving member 22, and a first slide rail 23. The first slide rail 23 is disposed on the mounting frame 60, the lifting plate 21 is slidably engaged with the first slide rail 23, the first driving member 22 is drivenly connected to the lifting plate 21 to drive the lifting plate 21 to move up and down, and the membrane support mechanism 30, the liquid injection mechanism 40, and the residual liquid recovery mechanism 50 are all disposed on the lifting plate 21.

[0034] Specifically, the mounting bracket 60 is a vertically arranged frame structure, providing a stable mounting base for the lifting mechanism 20. The first slide rail 23 consists of two parallel linear guide rails, fixed vertically to the side of the mounting bracket 60 facing the battery. The lifting plate 21 is a rectangular plate structure with a slider on its surface that mates with the first slide rail 23, forming a sliding engagement between the lifting plate 21 and the first slide rail 23 through the slider. The first driving component 22 is a cylinder, with the cylinder body fixed to the upper end of the mounting bracket 60 and the piston rod extending downwards and fixedly connected to the upper end of the lifting plate 21. The extension and retraction of the piston rod drives the lifting plate 21 to slide up and down along the first slide rail 23.

[0035] The membrane support mechanism 30, the electrolyte injection mechanism 40, and the residual electrolyte recovery mechanism 50 are all fixed to the lifting plate 21 by bolts or welding, and rise and fall synchronously with the lifting plate 21. When the cylinder drives the lifting plate 21 to descend, the membrane support mechanism 30 first approaches the battery and adsorbs the surface of the aluminum-plastic film 100; then the membrane support mechanism 30 moves to open the aluminum-plastic film 100; subsequently, the electrolyte injection mechanism 40 further descends to complete the electrolyte injection; finally, the residual electrolyte recovery mechanism 50 moves horizontally below the electrolyte injection mechanism 40 while the lifting plate 21 is in a low position to receive the residual electrolyte from the electrolyte injection mechanism 40.

[0036] like Figure 2As shown, the film support mechanism 30 in this embodiment includes a second driving member 31 and two suction cup assemblies 32. The two suction cup assemblies 32 are arranged opposite to each other. The second driving member 31 is driven to drive the two suction cup assemblies 32 to move closer or further away from each other. The suction cup assemblies 32 are configured to adsorb the surface of the aluminum-plastic film 100.

[0037] Specifically, two suction cup assemblies 32 are arranged horizontally opposite each other, corresponding to the two side surfaces of the aluminum-plastic film 100 of the soft-pack battery. The second driving component 31 is a servo motor, which is connected to the two suction cup assemblies 32 and can drive the two suction cup assemblies 32 to move closer or further apart in the horizontal direction. The suction end of the suction cup assembly 32 is made of flexible silicone material, which can conform to the curved contour of the aluminum-plastic film 100. The suction cup assembly 32 has a negative pressure channel inside, which is connected to an external negative pressure generating device. When the two suction cup assemblies 32 are relatively close and adhere to the surface of the aluminum-plastic film 100, the negative pressure channel generates a negative pressure suction force, which stably adsorbs the suction cup assembly 32 and the aluminum-plastic film 100. Then, the second driving component 31 drives the two suction cup assemblies 32 to move away from each other, which can open the aluminum-plastic film 100 to both sides and form a "pocket-type" liquid injection port.

[0038] Furthermore, such as Figure 2 As shown, the membrane support mechanism 30 in this embodiment further includes a connecting plate 33, a second slide rail 34, and a transmission assembly 35. One side of the connecting plate 33 is connected to the lifting mechanism 20, and the other side of the connecting plate 33 is provided with the second slide rail 34, which extends horizontally. Both suction cup assemblies 32 are slidably engaged with the second slide rail 34. The transmission assembly 35 is located on the side of the connecting plate 33 facing the suction cup assembly 32, and the second driving member 31 is located on the side of the connecting plate 33 away from the suction cup assembly 32. The output end of the transmission assembly 35 is connected to the output end of the second driving member 31, and the suction cup assembly 32 is fixedly connected to the transmission assembly 35.

[0039] Specifically, the connecting plate 33 is a horizontally arranged rectangular plate, one side of which is fixedly connected to the lifting plate 21 by bolts, forming a rigid connection between the membrane support mechanism 30 and the lifting mechanism 20. Two parallel second slide rails 34 are fixed to the other side of the connecting plate 33, extending horizontally. Two suction cup assemblies 32 are slidably engaged with the second slide rails 34, allowing the suction cup assemblies 32 to slide smoothly horizontally. A transmission assembly 35 is mounted on the end face of the connecting plate 33 facing the suction cup assemblies 32, and is drive-connected to both suction cup assemblies 32. A second driving member 31 is fixed to the end face of the connecting plate 33 away from the suction cup assemblies 32 by bolts, and its output end passes through a through hole in the connecting plate 33 and is drive-connected to the transmission assembly 35. The power of the second driving member 31 is transmitted to the two suction cup assemblies 32 through the transmission assembly 35, driving the two suction cup assemblies 32 to move towards or away from each other along the second slide rails 34.

[0040] By setting the connecting plate 33 as the mounting base for the film-supporting mechanism 30, the second slide rail 34, transmission component 35, second drive component 31, and suction cup component 32 are integrated on the connecting plate 33, making the film-supporting mechanism 30 an independent modular component, which facilitates disassembly, maintenance, and replacement, while also improving the structural compactness of the film-supporting mechanism 30 itself. The horizontally extending second slide rail 34 on the connecting plate 33 provides precise guidance and limitation for the horizontal movement of the suction cup component 32, preventing skewness during movement and ensuring the synchronous and symmetrical movement of the two suction cup components 32. This makes the liquid injection port opened by the aluminum-plastic film 100 more regular and improves the stability of liquid injection.

[0041] The transmission component 35 serves as the power transmission medium between the second driving component 31 and the suction cup component 32. It can synchronously transmit the single power of the second driving component 31 to the two suction cup components 32, so as to realize the synchronous movement of the two suction cup components 32 towards or away from each other, ensuring that the opening amplitude of the aluminum-plastic film 100 is consistent and improving the stability of the film-supporting effect.

[0042] Furthermore, such as Figure 2 As shown, the transmission assembly 35 in this embodiment includes a gear 351 and two racks 352. Each suction cup assembly 32 includes a suction cup 321 and a first mounting plate 322. The suction cup 321 is disposed on the first mounting plate 322 and is used to adsorb the surface of the aluminum-plastic film 100. One side of the first mounting plate 322 is slidably engaged with the second slide rail 34, and the other side is fixedly connected to one end of the corresponding rack 352. Both racks 352 mesh with the gear 351. The output end of the second driving member 31 is drivenly connected to the gear 351 to drive the gear 351 to rotate forward or backward and drive the two racks 352 to move towards or away from each other, so that the suction cup 321 on the first mounting plate 322 can adsorb the surface of the aluminum-plastic film 100 or expand the aluminum-plastic film 100 to form an injection port.

[0043] Specifically, gear 351 is rotatably mounted on connecting plate 33 via bearing housing, and the shaft of gear 351 is fixedly connected to the output shaft of second drive component 31 via coupling. Two racks 352 are arranged parallel to each other on the left and right sides of gear 351, respectively meshing with the teeth on both sides of gear 351. The first mounting plate 322 is an L-shaped plate, with its horizontal part fixedly connected to the end of rack 352, and a suction cup 321 mounted on its vertical part.

[0044] When the second driving member 31 drives the gear 351 to rotate forward, the two racks 352 move towards each other under the drive of the gear 351, causing the two first mounting plates 322 and their suction cups 321 to come closer together until the suction cups 321 adhere to the surfaces of the aluminum-plastic film 100 on both sides of the battery. After the suction cups 321 adsorb the aluminum-plastic film 100, the second driving member 31 drives the gear 351 to rotate in reverse, and the two racks 352 move away from each other, causing the two first mounting plates 322 and the suction cups 321 to move in opposite directions, that is, to pull the aluminum-plastic film 100 to both sides, so that a pocket-shaped liquid injection port is formed in the middle of the aluminum-plastic film 100.

[0045] In this embodiment, the transmission component 35 employs a gear 351 and two racks 352. Utilizing the precise meshing characteristics of the gear 351, the synchronous movement of the two racks 352 is ensured. When the gear 351 rotates, the two meshing racks 352 produce displacements of equal magnitude but opposite directions, enabling the two first mounting plates 322 and their suction cups 321 to move precisely towards or away from each other. This transmission method ensures the symmetry of the movement distance of the two suction cup components 32, resulting in uniform tension on both sides of the aluminum-plastic film 100. This achieves symmetrical expansion of both sides of the aluminum-plastic film 100, preventing misalignment of the injection port and facilitating accurate insertion of the injection nozzle 432, thus ensuring the precision of subsequent injection. The racks 352 are fixedly connected to the first mounting plates 322, directly transmitting the linear motion of the racks 352 to the suction cups 321. The second driving component 31 can achieve two actions—approaching and adsorbing—and moving away and spreading apart—by driving the gear 351 to rotate forward or reverse. The control logic is simple and the action switching is fast. The suction cup 321 is mounted on the first mounting plate 322, which provides stable support for the suction cup 321, ensuring that the suction cup 321 remains in a stable position during adsorption and pulling, without shifting or shaking.

[0046] like Figure 2 As shown, the membrane support mechanism 30 in this embodiment also includes a limiting component 36, which includes a limiting block 361 and at least two limiting switches 362. The limiting block 361 is disposed on the first mounting plate 322, and the limiting switches 362 are disposed on the connecting plate 33. When the limiting block 361 moves with the first mounting plate 322 and blocks the optical path of the limiting switch 362, the second driving member 31 stops driving.

[0047] Specifically, the limiting block 361 is a block or plate-like structure, fixed to the side or back of the first mounting plate 322 by bolts, and moves synchronously with the first mounting plate 322. The limiting switch 362 is a photoelectric switch, including a light emitter and a light receiver, which are arranged opposite each other on the connecting plate 33, forming an optical path between them. The limiting switch 362 is arranged along the moving direction of the first mounting plate 322. In this embodiment, at least two limiting switches 362 are defined as the first limiting switch and the second limiting switch, corresponding to the adsorption position and the open position of the suction cup assembly 32, respectively.

[0048] For example, when the first mounting plate 322 moves the suction cup assembly 32, the limiting block 361 moves accordingly. When the limiting block 361 moves to the position of the first limit switch, it blocks the light beam emitted by the light emitter, and the light receiver cannot receive the light signal, generating an electrical signal that is fed back to the control system. The control system controls the second driving member 31 to stop driving. At this time, the suction cup assembly 32 reaches the adsorption position, and the suction cup 321 adheres to and adsorbs the surface of the aluminum-plastic film 100. After the suction cup 321 adsorbs the aluminum-plastic film 100, the second driving member 31 drives in the opposite direction to make the gear 351 rotate in the opposite direction. The first mounting plate 322 drives the limiting block 361 to move in the opposite direction. When the limiting block 361 blocks the light path of the second limit switch, the second driving member 31 stops driving again. At this time, the suction cup assembly 32 reaches the open position, and the aluminum-plastic film 100 is opened to the maximum opening state, which facilitates the subsequent liquid injection mechanism 40 to inject liquid.

[0049] In this embodiment, the limiting block 361 is mounted on the first mounting plate 322 and moves synchronously with it, reflecting the actual position of the suction cup assembly 32 in real time. The limiting switch 362 is mounted on the connecting plate 33 and serves as a fixed reference point to detect the position of the limiting block 361. When the limiting block 361 blocks the optical path of the limiting switch 362, the limiting switch 362 generates an electrical signal. Upon receiving the signal, the control system immediately controls the second driving component 31 to stop driving, achieving precise control of the suction cup assembly 32's position. By setting at least two limiting switches 362, corresponding to the adsorption position and the expansion position respectively, it ensures that the suction cup assembly 32 can accurately stop at these two critical positions, avoiding unstable adsorption of the aluminum-plastic film 100 or incomplete expansion of the aluminum-plastic film 100. The limiting component 361 and the second driving component 31 form a closed-loop control, improving the position control accuracy of the film-supporting mechanism 30, ensuring the consistency of each film-supporting action, thereby ensuring the stability of the injection port's shape and size, which is beneficial for improving the injection success rate and product quality.

[0050] like Figure 2 As shown, a sliding groove 37 is provided on the side of the connecting plate 33. The limit switch 362 slides in the sliding groove 37, and a fastener (not shown in the figure) is provided between the limit switch 362 and the connecting plate 33. The limit switch 362 can slide along the sliding groove 37 to adjust the installation position and be locked and fixed by the fastener.

[0051] Specifically, a sliding groove 37 is provided on the side of the connecting plate 33, providing an adjustment track for the limit switch 362 along the moving direction of the suction cup assembly 32. The limit switch 362 slides in conjunction with the sliding groove 37, allowing the position of the limit switch 362 to be adjusted according to actual needs. Fasteners are used to lock the limit switch 362 onto the connecting plate 33 after adjustment, ensuring that the limit switch 362 is fixed in position during use and does not shift, thus guaranteeing the accuracy and repeatability of the detection position. The sliding groove 37 and fasteners allow the battery filling device to adapt to batteries of different sizes and specifications. When changing battery models, there is no need to replace the connecting plate 33 or re-machine the mounting holes; simply loosen the fasteners, slide the limit switch 362 to the new position, and then lock it. This makes debugging convenient and quick, improving the versatility and compatibility of the battery filling device. Simultaneously, the locking effect of the fasteners ensures that the limit switch 362 is fixed in position during normal operation, unaffected by vibration or impact, guaranteeing the stability and reliability of position detection.

[0052] like Figure 3 As shown, the liquid injection mechanism 40 in this embodiment includes a third driving member 41, a third slide rail 42, and a liquid injection nozzle assembly 43. The third slide rail 42 is vertically mounted on the lifting plate 21. The liquid injection nozzle assembly 43 is slidably engaged with the third slide rail 42. The third driving member 41 is drivenly connected to the liquid injection nozzle assembly 43 to drive the liquid injection nozzle assembly 43 to move up and down. The liquid injection nozzle assembly 43 includes a second mounting plate 431 and a plurality of liquid injection nozzles 432. The driving end of the third driving member 41 is drivenly connected to one side of the second mounting plate 431. The plurality of liquid injection nozzles 432 are spaced apart on the other side of the second mounting plate 431 along the arrangement direction of the batteries on the fixture 11; and each liquid injection nozzle 432 corresponds to a battery on the fixture 11.

[0053] Specifically, the third slide rail 42 is a linear guide rail, fixed vertically to the front of the lifting plate 21, and arranged parallel to the first slide rail 23. The length of the third slide rail 42 is determined according to the required lifting stroke of the injection nozzle assembly 43. The third drive component 41 is a servo motor or stepper motor and fixed on the lifting plate 21. The drive end of the third drive component 41 is fixedly connected to the second mounting plate 431 through a connecting flange or coupling to ensure that the driving force is evenly transmitted to the second mounting plate 431. During operation, when the lifting plate 21 drives the injection mechanism 40 to descend to a position close to the aluminum-plastic film 100, the third drive component 41 is activated, driving the injection nozzle assembly 43 to descend further along the third slide rail 42, so that the injection nozzle 432 passes through the injection port opened by the film-supporting mechanism 30 and is inserted into the battery for injection. After the injection is completed, the third drive component 41 reverses its direction, the injection nozzle assembly 43 rises and resets along the third slide rail 42, and the injection nozzle 432 is pulled out of the battery.

[0054] The injection nozzle 432 adopts a hollow tubular structure. Its upper end connects to the electrolyte supply system via a pipe connector, while its lower end is conical or obliquely cut, facilitating insertion into the injection port formed by the aluminum-plastic film 100. Multiple injection nozzles 432 are arranged in a straight line on the second mounting plate 431, with the arrangement direction consistent with the battery arrangement direction on the fixture 11. The spacing between the injection nozzles 432 is equal to the spacing between adjacent batteries on the fixture 11, ensuring that each injection nozzle 432 corresponds to one battery. When the fixture 11 carries multiple batteries, the second mounting plate 431 is equipped with a corresponding number of injection nozzles 432 to achieve simultaneous injection of multiple batteries. This arrangement fully utilizes the installation space of the second mounting plate 431, completing the injection of multiple batteries in a single lifting action, significantly improving production efficiency.

[0055] like Figure 3 As shown, the residual liquid recovery mechanism 50 includes a fourth driving member 51 and a residual liquid collection shell 52. The fourth driving member 51 is located at the lower end of the lifting plate 21. The output end of the fourth driving member 51 is driven to connect with the residual liquid collection shell 52 to drive the residual liquid collection shell 52 to move horizontally to directly below the injection nozzle 432 or return to the initial position.

[0056] Specifically, the fourth driving component 51 is a cylinder or electric push rod, fixed to one side or the back of the lower end of the lifting plate 21, with its output end extending horizontally. The side or back of the residual liquid collection shell 52 is fixedly connected to the output end of the fourth driving component 51, and under the drive of the fourth driving component 51, the residual liquid collection shell 52 can slide smoothly in the horizontal direction.

[0057] When the residual liquid collection shell 52 is not collecting residual liquid, it is located to the side and below the injection nozzle 432, avoiding the lifting path of the injection nozzle 432 and not affecting the injection operation. After injection is completed, the fourth drive unit 51 is activated, pushing the residual liquid collection shell 52 horizontally to directly below the injection nozzle 432. At this time, the injection nozzle 432 is located above the opening of the residual liquid collection shell 52, and the residual electrolyte on the injection nozzle 432 drips into the residual liquid collection shell 52. After collection is completed, the fourth drive unit 51 reverses its direction, pulling the residual liquid collection shell 52 back to its initial position.

[0058] By positioning the residual liquid collection shell 52 at the lower end of the lifting plate 21 and moving vertically synchronously with it, the relative vertical positions of the residual liquid collection shell 52 and the injection nozzle assembly 43 are kept constant, avoiding insufficient collection of residual liquid due to positional deviation. The opening size of the residual liquid collection shell 52 is larger than the overall size of the injection nozzle assembly 43, allowing it to simultaneously collect residual electrolyte from multiple injection nozzles 432, ensuring comprehensive collection of residual liquid and preventing electrolyte from dripping onto the surface of the fixture 11 and contaminating the production environment.

[0059] In some optional embodiments, the residual liquid collection shell 52 is a groove-shaped structure with an open top. The interior of the residual liquid collection shell 52 is provided with a buffer guide layer (not shown in the figure), and the bottom of the residual liquid collection shell 52 is provided with a drain port (not shown in the figure). The drain port is connected to an external residual liquid collection device through a hose, and a filter screen is provided at the drain port.

[0060] Specifically, the residual liquid collection shell 52 is made of corrosion-resistant materials, such as stainless steel, with an upper opening larger than the distribution range of the injection nozzles 432 to ensure complete collection of residual liquid dripping from all nozzles 432. A buffer layer, made of sponge, non-woven fabric, or a honeycomb structure, is laid inside the residual liquid collection shell 52 to buffer the impact of dripping electrolyte, prevent electrolyte splashing, and guide the electrolyte flow towards the drain port. The drain port is located at the lowest or center of the bottom of the residual liquid collection shell 52 for complete drainage of residual liquid. A removable filter screen is installed at the drain port to filter out any solid impurities that may be mixed into the electrolyte, preventing blockage of downstream pipelines. A corrosion-resistant flexible hose connects the drain port to an external residual liquid collection device. The residual liquid collection device can be a waste liquid tank or a waste liquid recycling system.

[0061] In this embodiment, the turntable mechanism 10 uses a cam divider to drive the large turntable 12 to rotate intermittently. The large turntable 12 has a diameter of 800mm-1200mm and 6-8 mounting positions are evenly arranged circumferentially. Each mounting position is fixedly connected to the fixture 11 by bolts. The fixture 11 has a rectangular frame structure and is provided with a placement slot for placing batteries. The size of each placement slot matches the shape of the soft-pack battery, and a positioning pin is provided at the bottom of the slot to fix the position of the battery. For every rotation of the large turntable 12 by one station angle, a corresponding fixture 11 arrives at the liquid injection station, realizing continuous cyclic operation.

[0062] The suction cup assembly 32 corresponds to the battery arrangement position on the fixture 11. There are 16 sets of suction cups 321, with each set consisting of two suction cups 321, corresponding to the eight batteries on each set of fixture 11. The two suction cups 321 in each set are symmetrically distributed on both sides of the battery aluminum-plastic film 100. The 16 sets of suction cups 321 are evenly distributed on two first mounting plates 322, each of which is equipped with eight suction cups 321. The arrangement position of the suction cups 321 corresponds one-to-one with the placement position of the batteries on the fixture 11, ensuring that there are corresponding suction cups 321 on both sides of the aluminum-plastic film 100 of each battery for adsorption and film support. Each suction cup 321 is a negative pressure suction cup 321, which is independently connected to the external negative pressure generating device. The suction on and off can be controlled individually to ensure the stability and uniformity of the suction force. The suction end of the negative pressure suction cup 321 is made of flexible silicone material, which does not make hard contact when it is attached to the surface of the aluminum-plastic film 100, thus avoiding scratching the aluminum-plastic film 100. At the same time, it improves the suction sealing performance, ensuring that the aluminum-plastic film 100 can be stably adsorbed and smoothly expanded to form the liquid injection port when the film is stretched.

[0063] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

[0064] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A battery electrolyte filling device, characterized in that, include: A turntable mechanism (10) is provided with a fixture (11) for carrying multiple batteries. The fixture (11) can be rotated to the liquid injection station under the drive of the turntable mechanism (10). A lifting mechanism (20) is provided at the liquid injection station; A membrane support mechanism (30) is drivenly connected to the lifting mechanism (20), and the membrane support mechanism (30) is configured to adsorb and expand the aluminum-plastic film (100) of the battery to form an injection port; The liquid injection mechanism (40) is driven to be connected to the lifting mechanism (20). The liquid injection mechanism (40) can descend and pass through the liquid injection port after the aluminum-plastic film (100) is opened by the film support mechanism (30). The residual liquid recovery mechanism (50) is driven to be connected to the lifting mechanism (20). The residual liquid recovery mechanism (50) can move to the bottom of the injection mechanism (40) after the injection mechanism (40) completes the injection to receive the residual electrolyte.

2. The battery electrolyte filling device according to claim 1, characterized in that, The battery liquid injection device includes a mounting frame (60), and the lifting mechanism (20) includes a lifting plate (21), a first driving member (22), and a first slide rail (23). The first slide rail (23) is disposed on the mounting frame (60), the lifting plate (21) is slidably engaged with the first slide rail (23), the first driving member (22) is drivenly connected to the lifting plate (21) to drive the lifting plate (21) to move up and down, and the membrane support mechanism (30), the liquid injection mechanism (40), and the residual liquid recovery mechanism (50) are all disposed on the lifting plate (21).

3. The battery electrolyte filling device according to claim 1, characterized in that, The film support mechanism (30) includes a second drive member (31) and two suction cup assemblies (32), which are arranged opposite to each other. The second drive member (31) is driven to drive the two suction cup assemblies (32) to move closer or further apart. The suction cup assemblies (32) are configured to adsorb the surface of the aluminum-plastic film (100).

4. The battery electrolyte filling device according to claim 3, characterized in that, The membrane support mechanism (30) further includes a connecting plate (33), a second slide rail (34), and a transmission assembly (35). One side of the connecting plate (33) is connected to the lifting mechanism (20), and the other side of the connecting plate (33) is provided with the second slide rail (34), which extends horizontally. Both suction cup assemblies (32) are slidably engaged with the second slide rail (34). The transmission component (35) is disposed on the side of the connecting plate (33) facing the suction cup assembly (32), and the second driving member (31) is disposed on the side of the connecting plate (33) away from the suction cup assembly (32); the transmission component (35) is connected to the output end of the second driving member (31) in a transmission connection, and the suction cup assembly (32) is fixedly connected to the transmission component (35).

5. The battery electrolyte filling device according to claim 4, characterized in that, The transmission assembly (35) includes a gear (351) and two racks (352). Each suction cup assembly (32) includes a suction cup (321) and a first mounting plate (322). The suction cup (321) is disposed on the first mounting plate (322) and is used to adsorb the surface of the aluminum-plastic film (100). One side of the first mounting plate (322) is slidably engaged with the second slide rail (34), and the other side is fixedly connected to one end of the corresponding rack (352). Both racks (352) mesh with the gear (351), and the output end of the second drive member (31) is driven to the gear (351) to drive the gear (351) to rotate forward or backward and drive the two racks (352) to move towards or away from each other, so that the suction cup (321) on the first mounting plate (322) can adsorb the surface of the aluminum-plastic film (100) or expand the aluminum-plastic film (100) to form the injection port.

6. The battery electrolyte filling device according to claim 5, characterized in that, The membrane support mechanism (30) further includes a limiting component (36), which includes a limiting block (361) and at least two limiting switches (362). The limiting block (361) is disposed on the first mounting plate (322), and the limiting switches (362) are disposed on the connecting plate (33). When the limiting block (361) moves with the first mounting plate (322) and blocks the optical path of the limiting switch (362), the second driving member (31) stops driving.

7. The battery electrolyte filling device according to claim 6, characterized in that, The side of the connecting plate (33) is provided with a sliding groove (37), the limit switch (362) slides in cooperation with the sliding groove (37), and a fastener is provided between the limit switch (362) and the connecting plate (33). The limit switch (362) can slide along the sliding groove (37) to adjust the installation position and be locked and fixed by the fastener.

8. The battery electrolyte filling device according to claim 2, characterized in that, The injection mechanism (40) includes a third drive member (41), a third slide rail (42), and an injection nozzle assembly (43). The third slide rail (42) is vertically mounted on the lifting plate (21). The injection nozzle assembly (43) is slidably engaged with the third slide rail (42). The third drive member (41) is driven to connect with the injection nozzle assembly (43) to drive the injection nozzle assembly (43) to move up and down.

9. The battery electrolyte filling device according to claim 8, characterized in that, The injection nozzle assembly (43) includes a second mounting plate (431) and a plurality of injection nozzles (432). The driving end of the third driving member (41) is driven to one side of the second mounting plate (431). The plurality of injection nozzles (432) are spaced apart on the other side of the second mounting plate (431) along the arrangement direction of the batteries on the fixture (11). The injection nozzles (432) correspond one-to-one with the batteries on the fixture (11).

10. The battery electrolyte filling device according to claim 9, characterized in that, The residual liquid recovery mechanism (50) includes a fourth driving member (51) and a residual liquid collection shell (52). The fourth driving member (51) is located at the lower end of the lifting plate (21). The output end of the fourth driving member (51) is driven to connect with the residual liquid collection shell (52) to drive the residual liquid collection shell (52) to move horizontally to directly below the injection nozzle (432) or back to the initial position.

11. The battery electrolyte filling device according to claim 10, characterized in that, The residual liquid collection shell (52) is a groove-shaped structure with an open top. A buffer guide layer is provided inside the residual liquid collection shell (52). A drain port is provided at the bottom of the residual liquid collection shell (52). The drain port is connected to an external residual liquid collection device through a hose, and a filter screen is provided at the drain port.

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