A high-efficiency liquid injection device

Abstract

The utility model relates to battery liquid injection technical field, especially a kind of high-efficiency liquid injection device, including production module, battery conveying module is equipped in production module inside lower end, mobile positioning module is equipped in production module top surface, slidingly connected with slider on mobile positioning module, liquid injection vacuum component is installed on the upper end of slider, liquid injection vacuum component includes injection needle, sleeve cup component is slidingly connected on slider, sleeve cup component includes liquid injection cup, liquid injection cup top surface is interconnected with liquid injection tube, injection needle and liquid injection tube plug-in cooperation, funnel is fixed in liquid injection cup inside, spring tube is interconnected with funnel lower end, battery liquid injection interface is fixed in spring tube lower end, mobile block is fixed in the outer circumferential wall of battery liquid injection interface. Adapted to the deviation of injection port position due to battery shell machining tolerance, reduce the alignment deviation problem that easily appears to traditional fixed or rough adjustment type liquid injection interface, reduce the situation of electrolyte leakage and liquid injection quantity inaccuracy, improve sealing and liquid leakage prevention effect.

Description

Technical Field

[0001] This utility model relates to the field of battery electrolyte filling technology, and in particular to a high-efficiency electrolyte filling device. Background Technology

[0002] In the production of large cylindrical batteries, the electrolyte injection process is a key step that affects battery performance and consistency. It requires precise injection of electrolyte, prevention of leakage and contamination, and adaptation to the production needs of batteries of different specifications. At present, the mainstream battery electrolyte injection devices generally adopt a structure in which the injection needle and the sleeve cup are connected. The electrolyte is delivered to the sleeve cup through the injection needle, and then guided to the battery injection port by the sleeve cup, thereby ensuring the sealing and precision of the electrolyte injection process.

[0003] According to the search, Chinese patent with announcement number CN108417769A provides a battery liquid injection device, which drives the liquid injection cup to pass through the through hole of the sealing mechanism through the first driving member, and cooperates with the battery liquid injection port to realize liquid injection, and uses the equal pressure chamber to improve the liquid injection efficiency.

[0004] However, during use, it was found that when the position of the battery filling port deviates due to the machining tolerance of the battery casing, the fixed or roughly adjusted filling interface is prone to misalignment, resulting in electrolyte leakage, inaccurate filling volume, or even damage to the battery filling port. If the insertion relationship between the filling needle and the sleeve cup is adjusted to adapt to different batteries, it is easy to damage the sealing fit between the two, causing new leakage risks and making it unfavorable for the use of the battery. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a high-efficiency liquid injection device that adapts to the positional deviation of the liquid injection port caused by the machining tolerance of the battery casing. It reduces the alignment misalignment problem that is prone to occur in traditional fixed or coarsely adjusted liquid injection interfaces, reduces electrolyte leakage and inaccurate liquid injection volume, and improves the sealing and leak-proof effect.

[0006] To solve the above technical problems, this utility model provides the following technical solution: a high-efficiency liquid injection device, including a production module, a battery delivery module at the lower end of the production module, a movable positioning module on the top surface of the production module, a slider slidably connected to the movable positioning module, a liquid injection vacuum assembly installed at the upper end of the slider, the liquid injection vacuum assembly including a liquid injection needle, and a cup assembly slidably connected to the slider;

[0007] The cup assembly includes an injection cup, with an injection tube connected to the top surface of the injection cup. The injection needle is inserted into the injection tube. A funnel is fixed inside the injection cup, and a spring tube is connected to the lower end of the funnel. A battery injection interface is fixed to the lower end of the spring tube. A movable block is fixed to the outer peripheral wall of the battery injection interface. A limiting groove is formed at the lower end of the injection cup. The movable block is slidably connected to the injection cup through the limiting groove. A C-shaped block is sleeved on the outer peripheral wall of the injection cup.

[0008] Preferably, the top surface of the injection needle is connected to an injection module, the upper end of the injection module is connected to an inlet pipe, and the lower end of the injection module is connected to a vacuum connector pipe.

[0009] Through the above technical solution, the electrolyte is delivered to the inlet pipe by an external injection pump and enters the injection module. Before injection, the external vacuum system is connected through a vacuum connector to evacuate the inside of the battery or the injection channel.

[0010] Preferably, a column is fixedly mounted on the top surface of the slider, a lifting block is slidably connected to the column, a first cylinder is installed at the upper end of the column, the bottom surface of the piston rod of the first cylinder is fixedly connected to the lifting block, and the liquid injection module is installed on the lifting block.

[0011] With the above technical solution, during liquid injection, the first cylinder drives the lifting block to descend along the column, which in turn moves the liquid injection module and the liquid injection needle downward.

[0012] Preferably, a positioning block is fixed on the slider, the C-shaped block is slidably connected to the positioning block, the injection tube is slidably connected to the injection cup, and two collars are respectively sleeved on the injection tube, with the top surface of the collar located inside the injection cup abutting against the inner wall of the injection cup.

[0013] Preferably, a spring is sleeved on the outer peripheral wall of the injection tube, the bottom surface of the spring abuts against the outer wall of the injection cup, and the upper end of the spring abuts against the bottom surface of the collar located at the upper end.

[0014] With the above technical solution, the connection between the injection needle and the injection tube is not affected when adjusting the position of the battery injection interface, thus improving the sealing and leakage prevention effect.

[0015] Preferably, a servo motor is mounted on the C-shaped block, a gear is sleeved on the output shaft of the servo motor, and a gear ring is sleeved on the outer peripheral wall of the lower end of the injection cup, with the gear meshing with the gear ring.

[0016] Through the above technical solution, the servo motor drives the injection cup to rotate along the C-shaped block through the meshing transmission of gears and gear rings.

[0017] Preferably, a second cylinder is mounted on the slider, and the output shaft of the second cylinder is fixedly connected to the lower end of the C-shaped block.

[0018] The above technical solution uses a second cylinder to push the C-shaped block to slide along the positioning block, thereby bringing the liquid injection cup closer to the battery.

[0019] Preferably, a third cylinder is installed on the lower outer peripheral wall of the injection cup, a push block is fixedly provided at one end of the moving block, the piston rod of the third cylinder is fixedly connected to the push block, and a gap is left between the third cylinder and the slider and the second cylinder respectively.

[0020] Through the above technical solution, the third cylinder drives the moving block to slide along the limiting groove through the push block, adjusting the alignment of the battery liquid injection interface with the battery liquid injection port.

[0021] Preferably, a flow solenoid valve is installed on the outer peripheral wall of the battery filling port.

[0022] The above technical solution enables real-time control of the injection flow rate, reducing the risk of leakage and battery damage.

[0023] The beneficial effects of this utility model are:

[0024] The electrolyte is delivered to the injection tube via the injection needle, enters the injection cup, and is guided through the funnel inside the injection cup to the spring tube. It is then injected into the battery through the battery injection port at the lower end of the spring tube. The movable block on the outer periphery of the battery injection port can slide along the limiting groove at the lower end of the injection cup, allowing for position adjustment of the battery injection port. This design accommodates positional deviations of the injection port caused by battery casing machining tolerances, reducing the alignment misalignment problems that easily occur with traditional fixed or coarsely adjusted injection ports, and minimizing electrolyte leakage and inaccurate injection volume. When adjusting the battery injection port position, the insertion and connection between the injection needle and the injection tube remain unaffected, improving sealing and leak-proof performance and ensuring a tight seal during the injection process. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the slider structure of this utility model;

[0027] Figure 3 This is a schematic diagram of the liquid injection and vacuuming assembly structure of this utility model;

[0028] Figure 4 This is a schematic diagram of the cup assembly structure of this utility model;

[0029] Figure 5 This is a schematic diagram of the battery electrolyte filling interface structure of this utility model.

[0030] In the diagram: 100, Production Module; 200, Battery Conveying Module; 300, Moving Positioning Module; 400, Slider; 500, Liquid Injection and Vacuuming Assembly; 501, Injection Needle; 502, Injection Module; 503, Inlet Pipe; 504, Vacuuming Connector Pipe; 505, Column; 506, Lifting Block; 507, First Cylinder; 600, Cup Assembly; 601, Injection Cup; 602, Injection Pipe; 603, Funnel; 604, Spring Tube; 605, Battery Injection Interface; 606, Moving Block; 607, Limiting Groove; 608, C-shaped Block; 609, Servo Motor; 610, Gear; 611, Gear Ring; 612, Positioning Block; 613, Second Cylinder; 614, Third Cylinder; 615, Push Block; 616, Flow Solenoid Valve; 617, Collar; 618, Spring. Detailed Implementation

[0031] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0032] like Figure 1-5 As shown, this embodiment provides a high-efficiency liquid injection device, including a production module 100. The lower end of the production module 100 is provided with a battery delivery module 200, and the top surface of the production module 100 is provided with a moving positioning module 300. A slider 400 is slidably connected to the moving positioning module 300. A liquid injection vacuum assembly 500 is installed on the upper end of the slider 400. The liquid injection vacuum assembly 500 includes a liquid injection needle 501, and a cup assembly 600 is slidably connected to the slider 400.

[0033] The cup assembly 600 includes a liquid injection cup 601, with a liquid injection tube 602 connected to the top surface of the liquid injection cup 601. A liquid injection needle 501 is inserted into the liquid injection tube 602. A funnel 603 is fixed inside the liquid injection cup 601. A spring tube 604 is connected to the lower end of the funnel 603. A battery liquid injection interface 605 is fixed to the lower end of the spring tube 604. A movable block 606 is fixed to the outer peripheral wall of the battery liquid injection interface 605. A limiting groove 607 is opened at the lower end of the liquid injection cup 601. The movable block 606 is slidably connected to the liquid injection cup 601 through the limiting groove 607.

[0034] The top surface of the injection needle 501 is connected to the injection module 502, the upper end of the injection module 502 is connected to the inlet pipe 503, and the lower end of the injection module 502 is connected to the vacuum connector pipe 504. The electrolyte is delivered to the inlet pipe 503 and enters the injection module 502 through an external injection pump. Before injection, the external vacuum system is connected through the vacuum connector pipe 504 to evacuate the battery or the injection channel.

[0035] A column 505 is fixedly mounted on the top surface of the slider 400. A lifting block 506 is slidably connected to the column 505. A first cylinder 507 is installed at the upper end of the column 505. The bottom surface of the piston rod of the first cylinder 507 is fixedly connected to the lifting block 506. The liquid injection module 502 is installed on the lifting block 506. When injecting liquid, the first cylinder 507 drives the lifting block 506 to descend along the column 505, which in turn drives the liquid injection module 502 and the liquid injection needle 501 to move downward.

[0036] A C-shaped block 608 is fitted on the outer periphery of the injection cup 601, and a positioning block 612 is fixed on the slider 400. The C-shaped block 608 and the positioning block 612 are slidably connected. The injection tube 602 is slidably connected to the injection cup 601. Two collars 617 are fitted on the injection tube 602. The top surface of the collar 617 located inside the injection cup 601 abuts against the inner wall of the injection cup 601. A spring 618 is fitted on the outer periphery of the injection tube 602. The bottom surface of the spring 618 abuts against the outer wall of the injection cup 601, and the upper end of the spring 618 abuts against the bottom surface of the collar 617 located at the upper end. When adjusting the position of the battery injection interface 605, the insertion and engagement of the injection needle 501 and the injection tube 602 are not affected, which improves the sealing and leakage prevention effect.

[0037] A servo motor 609 is mounted on the C-block 608. A gear 610 is sleeved on the output shaft of the servo motor 609. A gear ring 611 is sleeved on the outer peripheral wall of the lower end of the injection cup 601. The gear 610 and the gear ring 611 are meshed and connected. The servo motor 609 drives the injection cup 601 to rotate along the C-block 608 through the meshing of the gear 610 and the gear ring 611.

[0038] A second cylinder 613 is installed on the slider 400. The output shaft of the second cylinder 613 is fixedly connected to the lower end of the C-shaped block 608. The second cylinder 613 pushes the C-shaped block 608 to slide along the positioning block 612, thereby driving the liquid injection cup 601 to move closer to the battery.

[0039] A third cylinder 614 is installed on the outer peripheral wall of the lower end of the injection cup 601. A push block 615 is fixedly installed at one end of the moving block 606. The piston rod of the third cylinder 614 is fixedly connected to the push block 615. A gap is left between the third cylinder 614 and the slider 400 and the second cylinder 613 respectively. The third cylinder 614 drives the moving block 606 to slide along the limiting groove 607 through the push block 615, and adjusts the battery injection interface 605 to align with the battery injection port.

[0040] A flow solenoid valve 616 is installed on the outer peripheral wall of the battery filling port 605; it controls the filling flow rate in real time, reducing the risk of leakage and battery damage.

[0041] Working principle: After the battery to be injected is transported to the injection station by the battery delivery module 200, the moving positioning module 300 drives the slider 400 to slide, so that the cup assembly 600 is aligned with the battery injection port. The injection needle 501 in the injection vacuum assembly 500 is inserted and engaged with the injection tube 602 of the cup assembly 600 to form an electrolyte delivery channel.

[0042] Electrolyte is delivered to the injection tube 602 via the injection needle 501, enters the injection cup 601, and is guided to the spring tube 604 through the funnel 603 inside the injection cup 601. Then, it is injected into the battery through the battery injection port 605 at the lower end of the spring tube 604. The movable block 606 on the outer peripheral wall of the battery injection port 605 can slide along the limiting groove 607 at the lower end of the injection cup 601 to adjust the position of the battery injection port 605. This adapts to the position deviation of the injection port caused by the machining tolerance of the battery shell, reduces the alignment misalignment problem that is prone to occur in traditional fixed or coarse adjustment injection ports, and reduces the occurrence of electrolyte leakage and inaccurate injection volume.

[0043] When adjusting the position of the battery filling interface 605, the insertion and engagement of the filling needle 501 and the filling tube 602 are not affected, which improves the sealing and leakage prevention effect and ensures the sealing of the filling process.

[0044] The second cylinder 613 pushes the C-shaped block 608 to slide along the positioning block 612, causing the liquid filling cup 601 to move closer to the battery. The servo motor 609 drives the liquid filling cup 601 to rotate along the C-shaped block 608 through the meshing of the gear 610 and the gear ring 611. At the same time, the third cylinder 614 drives the moving block 606 to slide along the limiting groove 607 through the push block 615, adjusting the battery liquid filling interface 605 to align with the battery liquid filling port, reducing the impact of liquid filling port deviation, and adapting to the liquid filling use of batteries of different specifications.

[0045] During liquid injection, the first cylinder 507 drives the lifting block 506 to descend along the column 505, which in turn moves the liquid injection module 502 and the liquid injection needle 501 downward, so that the liquid injection needle 501 can be inserted and engaged with the liquid injection tube 602. The liquid injection tube 602 is buffered during insertion through the cooperation of the collar 617 and the spring 618, which reduces hard collisions and lowers the risk of seal failure caused by hard contact.

[0046] The electrolyte is delivered to the inlet pipe 503 by an external injection pump and enters the injection module 502. It is then delivered to the injection cup 601 through the injection needle 501 and the injection pipe 602. It is then guided to the spring tube 604 through the funnel 603 and finally injected into the battery through the battery injection interface 605. The flow solenoid valve 616 controls the injection flow in real time, reducing the risk of leakage and battery damage.

[0047] Before liquid injection, an external vacuum system is connected through vacuum connector tube 504 to evacuate the inside of the battery or the liquid injection channel, which improves the liquid injection efficiency and reduces liquid injection pollution.

[0048] After the injection is completed, the first cylinder 507 drives the injection needle 501 to rise and reset, and the second cylinder 613 drives the cup assembly 600 to return to its original position, waiting for the next injection cycle.

[0049] In some embodiments, the following liquid injection process is also included: the aluminum-cased cylindrical battery to be injected is transported to the liquid injection station through the battery delivery module 200, the robot grabs the battery and places it in the weighing position, and the system automatically records the initial weight data.

[0050] Before liquid injection, connect to an external vacuum system through vacuum connector tube 504 to evacuate the inside of the battery or the liquid injection channel, and at the same time perform a pressure holding capacity test. Unqualified products are automatically rejected.

[0051] The electrolyte is delivered to the inlet pipe 503 via an external injection pump, enters the injection module 502, and is injected through the injection needle 501. The injection volume is adjustable from 0 to 1000g, and a variable injection pump is used to switch between primary quantitative injection and secondary variable injection.

[0052] The filling cup 601 is slidably connected to the positioning block 612 via the C-shaped block 608. The servo motor 609 drives the gear 610 and the gear ring 611 to rotate the filling cup 601 and adjust the angle. The third cylinder 614 pushes the moving block 606 to slide along the limiting groove 607 to align with the battery filling port. The spring 618 buffers the insertion impact to ensure sealing.

[0053] After the electrolyte is injected, the battery is transferred to the isobaric settling mechanism, where it is alternately settling under vacuum conditions ≥-99kPa and pressure conditions 0.5-0.8MPa. The robotic arm then transfers the battery to the weighing position, where defective products are automatically rejected and qualified products are loaded onto a tray.

[0054] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency liquid injection device, comprising a production module (100), wherein a battery delivery module (200) is provided at the lower end of the production module (100), and a moving positioning module (300) is provided on the top surface of the production module (100), characterized in that: The mobile positioning module (300) is slidably connected to a slider (400), and a liquid injection vacuum assembly (500) is installed on the upper end of the slider (400). The liquid injection vacuum assembly (500) includes a liquid injection needle (501), and a cup assembly (600) is slidably connected to the slider (400). The cup assembly (600) includes an injection cup (601), the top surface of which is connected to an injection tube (602), the injection needle (501) is inserted into the injection tube (602), a funnel (603) is fixed inside the injection cup (601), the lower end of the funnel (603) is connected to a spring tube (604), the lower end of the spring tube (604) is fixed to a battery injection interface (605), a moving block (606) is fixed to the outer peripheral wall of the battery injection interface (605), a limiting groove (607) is opened at the lower end of the injection cup (601), the moving block (606) is slidably connected to the injection cup (601) through the limiting groove (607), and a C-shaped block (608) is sleeved on the outer peripheral wall of the injection cup (601).

2. The high-efficiency liquid injection device as described in claim 1, characterized in that: The top surface of the injection needle (501) is connected to the injection module (502), the upper end of the injection module (502) is connected to the inlet pipe (503), and the lower end of the injection module (502) is connected to the vacuum connector pipe (504).

3. The high-efficiency liquid injection device as described in claim 2, characterized in that: A column (505) is fixedly mounted on the top surface of the slider (400). A lifting block (506) is slidably connected to the column (505). A first cylinder (507) is installed on the upper end of the column (505). The bottom surface of the piston rod of the first cylinder (507) is fixedly connected to the lifting block (506). The liquid injection module (502) is installed on the lifting block (506).

4. The high-efficiency liquid injection device as described in claim 1, characterized in that, A positioning block (612) is fixed on the slider (400), the C-shaped block (608) is slidably connected to the positioning block (612), the injection tube (602) is slidably connected to the injection cup (601), and two collars (617) are respectively sleeved on the injection tube (602). The top surface of the collar (617) located inside the injection cup (601) abuts against the inner wall of the injection cup (601).

5. The high-efficiency liquid injection device as described in claim 4, characterized in that: A spring (618) is sleeved on the outer peripheral wall of the injection tube (602). The bottom surface of the spring (618) abuts against the outer wall of the injection cup (601), and the upper end of the spring (618) abuts against the bottom surface of the collar (617) located at the upper end.

6. The high-efficiency liquid injection device as described in claim 5, characterized in that: A servo motor (609) is mounted on the C-shaped block (608), and a gear (610) is sleeved on the output shaft of the servo motor (609). A gear ring (611) is sleeved on the outer peripheral wall of the lower end of the injection cup (601), and the gear (610) meshes with the gear ring (611).

7. The high-efficiency liquid injection device as described in claim 6, characterized in that: A second cylinder (613) is mounted on the slider (400), and the output shaft of the second cylinder (613) is fixedly connected to the lower end of the C-shaped block (608).

8. The high-efficiency liquid injection device as described in claim 7, characterized in that: A third cylinder (614) is installed on the lower outer peripheral wall of the injection cup (601). A push block (615) is fixedly provided at one end of the moving block (606). The piston rod of the third cylinder (614) is fixedly connected to the push block (615). A gap is left between the third cylinder (614) and the slider (400) and the second cylinder (613).

9. The high-efficiency liquid injection device as described in claim 8, characterized in that: A flow solenoid valve (616) is installed on the outer peripheral wall of the battery injection port (605).

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