Multifunctional liquid injection device for cylindrical battery

Abstract

The utility model discloses a cylindrical battery multifunctional liquid injection device, including liquid perfusion machine head and shell conveying device, the below of liquid perfusion machine head is provided with shell conveying device, and the inside fixed mounting of shell conveying device has servo motor, servo motor output fixedly connected with conveying carousel, and the top surface of conveying carousel is provided with a plurality of shell positioning seat around, in the utility model, through opening the valve end of inert gas storage tank top, promote inert gas to fill into the air outlet cover through the air outlet pipe, then even discharge by the porous plate of air outlet head end face, the setting of left and right sides inclined baffle of air outlet cover makes the inert gas that air outlet cover released covers the battery shell area that is being liquid injection continuously, avoids the moisture in the air and the lithium salt in electrolyte to have chemical reaction and influences the nature of electrolyte and the chemical environment in the battery inside, has the advantage of preventing electrolytic solution reaction, is favorable to guarantee the battery quality.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production technology, and in particular to a multifunctional liquid injection device for cylindrical batteries. Background Technology

[0002] The lithium battery production process includes selecting electrode raw materials, coating the electrode surface, cutting large electrode sheets into strips, winding the strips into the internal core of the lithium battery, inserting the core into the casing, welding the core to fix it in the casing, filling the casing with electrolyte, and finally sealing it to complete the production of the lithium battery.

[0003] In existing technologies, when injecting electrolyte into a lithium battery casing, it is inconvenient to treat the air around the injection environment. When the electrolyte injected into the lithium battery casing comes into contact with the air, the moisture in the air will react with the lithium salt in the electrolyte to produce hydrofluoric acid, which will affect the properties of the electrolyte and the chemical environment inside the battery. Furthermore, the carrier used to house the lithium battery casing is difficult to fix the lithium battery casing quickly, and there is a risk of tipping over during the electrolyte injection stage.

[0004] To address this issue, a multifunctional electrolyte injection device for cylindrical batteries is proposed, which has the advantages of preventing electrolyte reaction and preventing battery casing tipping, thereby solving the problems mentioned in the background technology. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multifunctional liquid injection device for cylindrical batteries.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a multi-functional liquid injection device for cylindrical batteries, comprising a liquid injection head and a housing conveying device. The housing conveying device is located below the liquid injection head, and a servo motor is fixedly installed inside the housing conveying device. The output end of the servo motor is fixedly connected to a conveying turntable, and a plurality of housing positioning seats are arranged around the top surface of the conveying turntable. Each housing positioning seat has a fixing box fixed on both its left and right sides. A spring is installed inside the fixing box, and one end of the spring abuts against an arc protrusion. One end of the arc protrusion extends to the inside of the housing positioning seat. A side box is welded to the side wall of the housing conveying device, and an inert gas storage tank is movably installed inside the side box. The valve end of the top of the inert gas storage tank is connected to an outlet pipe, and the upper end of the outlet pipe is connected to an outlet hood. An outlet head is provided on the side of the outlet hood facing the housing positioning seat, and a perforated plate is embedded in the end face of the outlet head. Inclined baffles are welded to both the left and right sides of the outlet hood.

[0007] As a further description of the above technical solution: the air outlet is located on the upper surface of the air outlet hood, and two colored ribbons are installed on the perforated plate surface of the air outlet.

[0008] As a further description of the above technical solution: the housing positioning seat has a U-shaped structure when viewed from above, and the height of the housing positioning seat is lower than the height of the battery housing.

[0009] As a further description of the above technical solution: the housing conveying device is equipped with a controller, servo driver and encoder corresponding to the servo motor.

[0010] As a further description of the above technical solution: a limiting seat is provided at one end of the arc protrusion extending to the inner side of the fixing box, and the arc protrusion abuts against the spring through the limiting seat.

[0011] As a further description of the above technical solution: a horizontal plate is welded to the left side wall of the housing conveying device, and a U-shaped notch is opened on the side of the horizontal plate corresponding to the air outlet pipe.

[0012] This utility model has the following beneficial effects: In this invention, by opening the valve at the top of the inert gas storage tank, inert gas is forced into the gas outlet hood through the outlet pipe, and then evenly discharged through the perforated plate at the outlet end face. Combined with the inclined baffles on the left and right sides of the gas outlet hood, the inert gas released by the gas outlet hood continuously covers the area of ​​the battery casing being injected with electrolyte, preventing moisture in the air from reacting chemically with the lithium salt in the electrolyte and affecting the properties of the electrolyte and the internal chemical environment of the battery. This has the advantage of preventing electrolyte reaction and is beneficial to ensuring battery quality. At the same time, several U-shaped casing positioning seats are arranged around the top surface of the conveyor turntable, and a set of fixing boxes, arc protrusions and springs are respectively set on both sides of the casing positioning seats. As the battery casing is sent into the casing positioning seats, the arc protrusions can elastically abut according to the size of the cylindrical battery casing, realizing the elastic clamping of the cylindrical battery casing, increasing the stability during the electrolyte injection stage, and having the advantage of preventing tipping. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the multifunctional liquid injection device for cylindrical batteries of this utility model; Figure 2 A top view of the conveyor turntable; Figure 3 This is a 3D view of the vent hood; Figure 4 for Figure 2 Enlarged view of structure A.

[0014] Legend: 1. Liquid filling head; 2. Shell conveying device; 3. Servo motor; 4. Conveying turntable; 5. Side box; 6. Inert gas storage tank; 7. Gas outlet pipe; 8. Gas outlet hood; 9. Inclined baffle; 10. Shell positioning seat; 11. Fixing box; 12. Arc protrusion; 13. Gas outlet head; 14. Perforated plate; 15. Ribbon; 16. Spring. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] According to an embodiment of the present invention, a multifunctional liquid injection device for cylindrical batteries is provided.

[0017] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-4 As shown, the multifunctional liquid injection device for cylindrical batteries according to an embodiment of the present invention includes a liquid injection head 1 and a housing conveying device 2. The housing conveying device 2 is arranged below the liquid injection head 1, and a servo motor 3 is fixedly installed inside the housing conveying device 2. The output end of the servo motor 3 is fixedly connected to a conveying turntable 4, and a plurality of housing positioning seats 10 are arranged around the top surface of the conveying turntable 4. Each housing positioning seat 10 has a fixing box 11 fixed on both its left and right sides. A spring 16 is arranged inside the fixing box 11, and one end of the spring 16 abuts against an arc protrusion 12. One end of the arc protrusion 12 extends to the inside of the housing positioning seat 10. A side box 5 is welded to the side wall of the housing conveying device 2, and an inert gas storage tank 6 is movably installed inside the side box 5. The valve end at the top of the inert gas storage tank 6 is connected to... There is an air outlet pipe 7, and the upper end of the air outlet pipe 7 is connected to an air outlet hood 8. An air outlet head 13 is provided on the side of the air outlet hood 8 facing the housing positioning seat 10, and a perforated plate 14 is embedded in the end face of the air outlet head 13. Slanted baffles 9 are welded on both the left and right sides of the air outlet hood 8. The servo motor 3 is intermittently driven by the controller, servo driver and encoder, and the rotation angle of the servo motor 3 is 60 degrees each time. The controller stops outputting after sending a fixed number of pulses. The motor completes the specified angle rotation and maintains the position. The encoder provides real-time feedback on the actual position of the motor. The controller adjusts the output through a PID algorithm to ensure the angle accuracy and stopping stability of the intermittent rotation. Regarding the intermittent transmission of the servo motor 3, the contents not described in detail in this specification are existing technologies known to those skilled in the art. In one embodiment, the air outlet 13 is located on the upper surface of the air outlet hood 8, and two ribbons 15 are installed on the surface of the perforated plate 14 of the air outlet 13. With this structure, as the inert gas is blown out, the two ribbons 15 are raised with the airflow, serving as evidence of whether the inert gas has been blown out.

[0018] In one embodiment, the housing positioning seat 10 has a U-shaped structure when viewed from above, and the height of the housing positioning seat 10 is lower than the height of the battery housing. This structure facilitates the quick loading and unloading of cylindrical battery housings.

[0019] In one embodiment, the housing conveying device 2 is equipped with a controller, a servo driver, and an encoder corresponding to the servo motor 3. The controller sends pulses to the servo driver, which drives the servo motor 3. The servo motor 3 is connected to the actuator (transfer turntable 4) through a coupling to realize the periodic switching of the battery housing within the housing positioning seat 10. The control flow of the servo motor 3 is as follows: PC / PLC instruction → controller calculates the number of pulses → driver outputs pulses → motor rotates at a fixed angle → encoder feedback → stop and maintain position → wait for the next trigger.

[0020] In one embodiment, a limiting seat is provided at one end of the arc protrusion 12 extending to the inner side of the fixing box 11, and the arc protrusion 12 abuts against the spring 16 through the limiting seat. This structure limits the arc protrusion 12 and prevents the device from falling out of the fixing box 11.

[0021] In one embodiment, a horizontal plate is welded to the left side wall of the housing conveying device 2, and a U-shaped notch is opened on the side of the horizontal plate corresponding to the air outlet pipe 7. The inner space of the U-shaped notch is adapted to the size of the air outlet pipe 7. This structure can provide support for the air outlet pipe 7.

[0022] Working principle: In use, the servo motor 3 of the housing conveying device 2 is first started to rotate intermittently at a fixed angle, causing the servo motor 3 to drive the conveying turntable 4 to rotate intermittently at a fixed angle. This causes each housing positioning seat 10 on the conveying turntable 4 to move past the bottom of the liquid filling machine head 1. At this time, since several U-shaped housing positioning seats 10 are arranged around the top surface of the conveying turntable 4, and a set of fixing boxes 11, arc protrusions 12 and springs 16 are respectively arranged on both sides of the housing positioning seats 10, as the robot arm sends the battery housing into the housing positioning seat 10, combined with the adaptive extension and contraction of the springs 16 in the fixing boxes 11, the arc protrusions 12 can... Based on the elastic fit of the cylindrical battery casing, the cylindrical battery casing is elastically clamped, increasing stability during the liquid injection stage and preventing tipping. At the same time, by opening the valve end at the top of the inert gas storage tank 6, inert gas is forced to enter the gas outlet hood 8 through the gas outlet pipe 7, and then evenly discharged through the perforated plate 14 on the end face of the gas outlet head 13. Combined with the setting of the inclined baffles 9 on the left and right sides of the gas outlet hood 8, the inert gas released by the gas outlet hood 8 continuously covers the area of ​​the battery casing being injected with liquid, preventing moisture in the air from chemically reacting with the lithium salt in the electrolyte and affecting the properties of the electrolyte and the chemical environment inside the battery.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 multi-functional liquid filling device for cylindrical batteries, comprising a liquid filling head (1) and a casing conveying device (2), characterized in that: Below the liquid filling head (1) is a housing conveying device (2), and a servo motor (3) is fixedly installed inside the housing conveying device (2). The output end of the servo motor (3) is fixedly connected to a conveying turntable (4), and a number of housing positioning seats (10) are arranged around the top surface of the conveying turntable (4). Each housing positioning seat (10) has a fixing box (11) fixed on its left and right sides. A spring (16) is provided inside the fixing box (11), and one end of the spring (16) abuts against an arc protrusion (12). The arc protrusion (12) One end extends to the inside of the housing positioning seat (10). The side wall of the housing conveying device (2) is welded with a side box (5), and an inert gas storage tank (6) is movably installed inside the side box (5). The valve end of the top of the inert gas storage tank (6) is connected to an outlet pipe (7), and the upper end of the outlet pipe (7) is connected to an outlet hood (8). An outlet head (13) is provided on the side of the outlet hood (8) facing the housing positioning seat (10), and a perforated plate (14) is embedded in the end face of the outlet head (13). Inclined baffles (9) are welded on both the left and right sides of the outlet hood (8).

2. The multifunctional liquid injection device for cylindrical batteries according to claim 1, characterized in that: The air outlet (13) is located on the upper surface of the air outlet cover (8), and two colored ribbons (15) are installed on the surface of the perforated plate (14) of the air outlet (13).

3. The multifunctional liquid injection device for cylindrical batteries according to claim 1, characterized in that: The housing positioning seat (10) has a U-shaped structure when viewed from above, and the height of the housing positioning seat (10) is lower than the height of the battery housing.

4. The multifunctional liquid injection device for cylindrical batteries according to claim 1, characterized in that: The housing conveying device (2) is equipped with a controller, servo driver and encoder corresponding to the servo motor (3).

5. The multifunctional liquid injection device for cylindrical batteries according to claim 1, characterized in that: The arc protrusion (12) extends to one end of the fixed box (11) and is provided with a limiting seat, and the arc protrusion (12) abuts against the spring (16) through the limiting seat.

6. The multifunctional liquid injection device for cylindrical batteries according to claim 1, characterized in that: The shell conveying device (2) has a horizontal plate welded to its left side wall, and the side of the horizontal plate has a U-shaped notch corresponding to the air outlet pipe (7).

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