A lithium battery liquid vacuum injection device

Abstract

This utility model discloses a lithium battery fluid vacuum injection device, including a battery pack fixing platform, a sealing injection device, and a lifting device. The sealing injection device is disposed above the battery pack fixing platform and connected to the lifting device. The sealing injection device includes a sealing cover, an electric cylinder, an injection device, and a lifting plate. Several electric cylinders are connected to the sealing cover, and their piston rods are respectively connected to the lifting plate and the opening and closing pressure plate. Several injection devices are connected between the sealing cover and the lifting plate. The injection end of the injection device penetrates through the sealing cover and extends into the sealing cover. A vacuum hole is provided on the sealing cover. This utility model's lithium battery fluid vacuum injection device has a simple structure and is convenient and practical. By controlling the lifting plate with electric cylinders, it achieves the purpose of controlling the injection device to quickly export a quantitative amount of battery fluid, thereby reducing the use of metering elements or valve bodies, reducing the equipment footprint, and lowering equipment costs.

Description

Technical Field

[0001] This utility model belongs to the field of lithium battery liquid vacuum injection technology, and specifically relates to a lithium battery liquid vacuum injection device. Background Technology

[0002] The role of lithium battery electrolyte is to conduct ions between the positive and negative electrodes, acting as a medium for charging and discharging, much like blood in the human body. During the production and processing of lithium batteries, battery fluid needs to be added. Electrolyte injection is typically performed using a vacuum injection machine. This machine uses peristaltic pumps, flow meters, or flow valves for control, resulting in numerous components for controlling the injection volume. Higher precision components are more expensive and require regular maintenance. This makes the lithium battery injection machine complex, costly to manufacture, and relatively large, requiring a significant footprint. Therefore, we provide a lithium battery electrolyte vacuum injection device. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a lithium battery fluid vacuum injection device, which has a simple structure and is convenient and practical. The lifting plate is controlled by an electric cylinder to achieve the purpose of quickly discharging a quantitative amount of battery fluid. It also reduces the use of metering elements or valves, reduces the equipment footprint, and lowers equipment costs.

[0004] A lithium battery fluid vacuum injection device includes a battery pack fixing platform, a sealing injection device, and a lifting device. The sealing injection device is positioned above the battery pack fixing platform and connected to the lifting device. The sealing injection device includes a sealing cover, electric cylinders, injection devices, and a lifting plate. Several electric cylinders are connected to the sealing cover, and their piston rods are respectively connected to the lifting plate and an opening / closing pressure plate. Several injection devices are connected between the sealing cover and the lifting plate. The injection end of each injection device extends through the sealing cover and into the interior of the sealing cover. The sealing cover has a vacuum hole, and the opening / closing pressure plate has a section for the injection device. The device includes an injection housing and a piston mechanism. The piston mechanism is located inside the injection housing, and its control end passes through the injection housing and connects to the lifting plate. The piston mechanism includes a connecting plate, a piston rod, an upper piston, a lower piston, and a connecting column. The connecting plate is connected to the upper piston through several piston rods. The lower piston is connected to the upper piston through the connecting column. A reflux groove is provided at one end of the connecting column near the upper piston. A through hole is provided through the connecting column, and the through hole is located inside the reflux groove. A leak-proof sealing ring is provided inside the through hole.

[0005] Preferably, the electrolyte filling housing includes a cylindrical battery electrolyte housing, a reflux column, and a stepped tube. The stepped tube is connected to the lower end of the cylindrical battery electrolyte housing. The upper end of the cylindrical battery electrolyte housing has several piston rod holes for the piston rod to pass through. A sealing ring is installed in each piston rod hole. One end of the reflux column is connected to the pressure plate, and the other end passes through the cylindrical battery electrolyte housing and the stepped tube. A sealing spring is fitted onto the reflux column and it is located between the cylindrical battery electrolyte housing and the pressure plate. A reflux hole is opened at the end of the reflux column away from the cylindrical battery electrolyte housing. A reflux outlet hole is opened on the reflux column, connecting the cylindrical battery electrolyte housing and the reflux hole. Several outlet grooves are opened on the side wall of the end of the reflux column away from the cylindrical battery electrolyte housing. A battery electrolyte quick connector is connected to the cylindrical battery electrolyte housing, and a flexible tube is connected to the quick connector. A one-way valve is installed on the flexible tube.

[0006] Preferably, the inner wall of the stepped tube at the end away from the cylindrical battery liquid shell is in close contact with the outer wall of the return column.

[0007] Preferably, the end of the reflux column away from the cylindrical battery liquid shell is provided with an arc-shaped convex ring, and the end of the stepped tube away from the cylindrical battery liquid shell is provided with an annular sealing groove.

[0008] Preferably, the lifting plate is connected to a height-fixing bolt. Beneficial effects

[0009] (1) The present invention provides a lithium battery liquid vacuum injection device, which is simple in structure, convenient and practical. The lifting plate is raised and lowered by electric cylinder to achieve the purpose of controlling the injection device to quickly export a quantitative amount of battery liquid, thereby reducing the use of metering elements or valve bodies, reducing the equipment footprint and reducing equipment costs.

[0010] (2) The present invention provides a lithium battery liquid vacuum injection device, which controls the movement of the upper and lower pistons by the piston rod, so that the battery liquid in the cylindrical battery liquid shell is pumped out, and then the other side forms a negative pressure to suck out the excess battery liquid, thereby achieving the purpose of quantitatively exporting battery liquid by lifting and lowering. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the vacuum liquid injection device; Figure 2 This is a schematic diagram of the sealed liquid injection device; Figure 3 This is a schematic diagram of the liquid injection device; Figure 4 This is a schematic diagram of the piston mechanism; Figure 5 This is a schematic diagram of the liquid injection shell structure; 1-Battery pack fixing platform, 2-Sealing liquid injection device, 3-Sealing cover, 4-Electric cylinder, 5-Liquid injection device, 51-Liquid injection shell, 52-Piston mechanism, 53-Connecting plate, 54-Piston rod, 55-Upper piston, 56-Lower piston, 57-Connecting column, 58-Through hole, 59-Return groove, 510-Cylindrical battery liquid shell, 511-Piston column hole, 512-Sealing ring, 513-Return column, 514-Return outlet hole, 515-Stepped tube, 516-Return hole, 517-Outlet groove, 518-Annular sealing groove, 519-Arc-shaped convex ring, 520-Pressure plate, 521-Sealing spring, 6-Lifting plate, 7-Opening and closing pressure plate. Detailed Implementation

[0012] The embodiments of this utility model are further described below with reference to the accompanying drawings. Example

[0013] like Figures 1 to 5As shown; a lithium battery fluid vacuum injection device includes a battery pack fixing platform 1, a sealing injection device 2, and a lifting device. The sealing injection device 2 is positioned above the battery pack fixing platform 1 and connected to the lifting device. The sealing injection device 2 includes a sealing cover 3, electric cylinders 4, injection devices 5, and a lifting plate 6. Several electric cylinders 4 are connected to the sealing cover 3, and their piston rods are respectively connected to the lifting plate 6 and the opening and closing pressure plate 7. Several injection devices 5 are connected between the sealing cover 3 and the lifting plate 6. The injection end of the injection device 5 penetrates the sealing cover 3 and extends into the sealing cover 3. The sealing cover 3 has a vacuum hole. The opening and closing pressure plate 7 has a passage for the injection devices 5 and the electric cylinders 4 connected to the lifting plate 6 to pass through. The injection device 5 includes an injection housing 51 and a piston mechanism 52. The piston mechanism 52 is disposed inside the injection housing 51 and its control end passes through the injection housing 51 and is connected to the lifting plate 6. The piston mechanism 52 includes a connecting plate 53, a piston rod 54, an upper piston 55, a lower piston 56, and a connecting column 57. The connecting plate 53 is connected to the upper piston 55 through several piston rods 54. The lower piston 56 is connected to the upper piston 55 through the connecting column 57. A return groove 59 is provided at one end of the connecting column 57 near the upper piston 55. A through hole 58 is provided on the connecting column 57. The through hole 58 is opened in the return groove 59. A leak-proof sealing ring is provided in the through hole 58. The electrolyte filling housing 51 includes a cylindrical battery electrolyte housing 510, a reflux column 513, and a stepped tube 515. The stepped tube 515 is connected to the lower end of the cylindrical battery electrolyte housing 510. The upper end of the cylindrical battery electrolyte housing 510 has several piston rod holes 511 for the piston rod 54 to pass through. A sealing ring 512 is provided in the piston rod hole 511. One end of the reflux column 513 is connected to the pressure plate 520, and the other end passes through the cylindrical battery electrolyte housing 510 and the stepped tube 515. A sealing spring 521 is sleeved on the reflux column 513 and is located between the cylindrical battery electrolyte housing 510 and the pressure plate 520. A reflux hole 516 is provided at the end of the reflux column 513 away from the cylindrical battery electrolyte housing 510. A return outlet hole 514 is provided, connecting the cylindrical battery liquid casing 510 and the return hole 516. Several outlet grooves 517 are provided on the side wall of the end of the return column 513 away from the cylindrical battery liquid casing 510. A quick-connect battery liquid connector is connected to the cylindrical battery liquid casing 510, and a flexible hose is connected to the quick-connect connector. A one-way valve is provided on the flexible hose. The inner wall of the stepped pipe 515 away from the cylindrical battery liquid casing 510 is in close contact with the outer wall of the return column 513. An arc-shaped protrusion 519 is provided at the end of the return column 513 away from the cylindrical battery liquid casing 510, and an annular sealing groove 518 is provided at the end of the stepped pipe 515 away from the cylindrical battery liquid casing 510. A height-fixing bolt is connected to the lifting plate 6.

[0014] The battery pack is pre-positioned and fixed on the battery pack fixing platform 1. Simultaneously, the vacuum hole is connected to the vacuum device. The lifting device lowers the sealing cover 3 to close with the battery pack fixing platform 1. At the same time, the head of the stepped tube 515 and the head of the return column 513 are inserted into the corresponding battery pack. The electric cylinder 4 lowers the lifting plate 6, which in turn lowers the connecting plate 53 of the liquid injection device 5. The connecting plate 53 then sequentially lowers the piston rod 54, the upper piston 55, the connecting column 57, and the lower piston 56 simultaneously. At this time, the lower piston 56... The battery fluid in the lower cylindrical battery fluid housing 510 is squeezed out, and the battery fluid is discharged through the stepped pipe 515 and the outlet groove 517. The descent of the upper piston 55 creates a negative pressure in the space above the cylindrical battery fluid housing 510, causing a negative pressure state in the return outlet hole 514 and the return hole 516. This allows the battery fluid in the battery pack to be rapidly drawn into the return outlet hole 514 and the return hole 516 when it submerges the head of the return column 513, and then enters the space above the upper piston 55 within the cylindrical battery fluid housing 510. The purpose of quantitatively injecting battery fluid is achieved by using an electric cylinder 4 to raise and lower the opening and closing pressure plate 7. The opening and closing pressure plate 7 causes the pressure plate 520 and the return column 521 to descend, causing the arc-shaped convex ring 519 at the head of the return column 521 to separate from the annular sealing groove 518, allowing the battery fluid in the stepped tube 515 to be smoothly discharged and injected into the battery pack. When the arc-shaped convex ring 519 and the annular sealing groove 518 close and seal, a negative pressure is formed in the space inside the cylindrical battery fluid shell 510 below the lower piston 56 when it rises. The negative pressure causes the one-way valve to open and release the battery fluid. The battery fluid is drawn into the space inside the cylindrical battery fluid housing 510 below the lower piston 56; at the same time, as the upper piston 55 rises, the space inside the cylindrical battery fluid housing 510 above it gradually shrinks, and the battery fluid is then discharged into the battery fluid basin through the return outlet hole 514 and the return hole 516. The battery fluid basin is placed below the sealing injection device 2 via a rotating platform, and the battery pack fixing platform 1 is also set on the rotating platform. This cycle completes the battery fluid injection into the battery pack; the amount of battery fluid discharged is controlled by adjusting the distance of the descending connecting plate 53 by adjusting the height bolt.

[0015] The specific embodiments of this utility model have been described in detail above, but they are merely examples, and this utility model is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to this utility model are also within the scope of this utility model. Therefore, all equivalent changes and modifications made without departing from the spirit and scope of this utility model are covered within the scope of this utility model.

Claims

1. A lithium battery liquid vacuum injection device, characterized in that: The device includes a battery pack fixing platform (1), a sealing liquid injection device (2), and a lifting device. The sealing liquid injection device (2) is located above the battery pack fixing platform (1) and connected to the lifting device. The sealing liquid injection device (2) includes a sealing cover (3), an electric cylinder (4), an injection device (5), and a lifting plate (6). Several electric cylinders (4) are connected to the sealing cover (3), and their piston rods are respectively connected to the lifting plate (6) and the opening and closing pressure plate (7). Several injection devices (5) are connected between the sealing cover (3) and the lifting plate (6). The injection end of the injection device (5) extends through the sealing cover (3) into the sealing cover (3). The sealing cover (3) has a vacuum hole. The opening and closing pressure plate (7) has a hole through which the injection device (5) and the electric cylinder (4) connected to the lifting plate (6) pass. 5) Includes an injection housing (51) and a piston mechanism (52). The piston mechanism (52) is located inside the injection housing (51) and its control end passes through the injection housing (51) and is connected to the lifting plate (6). The piston mechanism (52) includes a connecting plate (53), a piston rod (54), an upper piston (55), a lower piston (56), and a connecting column (57). The connecting plate (53) is connected to the upper piston (55) through several piston rods (54). The lower piston (56) is connected to the upper piston (55) through the connecting column (57). A reflux groove (59) is provided at one end of the connecting column (57) near the upper piston (55). A through hole (58) is provided on the connecting column (57). The through hole (58) is located in the reflux groove (59). A leak-proof sealing ring is provided in the through hole (58).

2. The vacuum liquid injection apparatus for lithium batteries according to claim 1, wherein: The liquid injection housing (51) includes a cylindrical battery liquid housing (510), a reflux column (513), and a stepped tube (515). The stepped tube (515) is connected to the lower end of the cylindrical battery liquid housing (510). The upper end of the cylindrical battery liquid housing (510) has several piston rod holes (511) for the piston rod (54) to pass through. A sealing ring (512) is provided in the piston rod hole (511). One end of the reflux column (513) is connected to the pressure plate (520), and the other end passes through the cylindrical battery liquid housing (510) and the stepped tube (515). A sealing spring (52) is sleeved on the reflux column (513). 1) Located between the cylindrical battery liquid housing (510) and the pressure plate (520), the return column (513) has a return hole (516) at one end away from the cylindrical battery liquid housing (510), and a return outlet hole (514) connecting the cylindrical battery liquid housing (510) and the return hole (516) is provided on the side wall of the end of the return column (513) away from the cylindrical battery liquid housing (510). A number of outlet grooves (517) are provided on the side wall of the end of the return column (513) away from the cylindrical battery liquid housing (510). A battery liquid quick connector is connected to the cylindrical battery liquid housing (510), and a hose is connected to the quick connector. A one-way valve is provided on the hose.

3. The vacuum liquid injection apparatus for lithium batteries of claim 2, wherein: The inner wall of the stepped tube (515) away from the cylindrical battery liquid shell (510) is in close contact with the outer wall of the return column (513).

4. The vacuum liquid injection apparatus for lithium batteries of claim 3, wherein: The end of the reflux column (513) away from the cylindrical battery liquid shell (510) is provided with an arc-shaped convex ring (519), and the end of the stepped tube (515) away from the cylindrical battery liquid shell (510) is provided with an annular sealing groove (518).

5. The vacuum liquid injection apparatus for lithium batteries according to claim 1 or 4, wherein: The lifting plate (6) is connected to a fixed height bolt.

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