Negative pressure cup assembly

Abstract

The utility model discloses a negative pressure cup assembly which comprises a negative pressure cup cover, a negative pressure cup body, a negative pressure suction nozzle rod and an installation base, and a through hole is formed in the negative pressure cup cover. The negative pressure cup body is provided with a containing cavity, the containing cavity is provided with a top opening and a bottom opening, the top opening is communicated with the through hole, and the bottom opening is a liquid inlet; the top of the negative-pressure suction nozzle rod extends into the bottom opening of the negative-pressure cup body and is integrally connected with the bottom opening; the mounting seat is provided with a through hole, the negative pressure suction nozzle rod penetrates through the through hole, and the mounting seat is mounted on a needle bed; a first annular taper table is arranged on the periphery of the negative pressure suction nozzle rod, a second annular taper table matched with the first annular taper table is formed in the position, at the through hole, of the installation base in an inwards-concave mode, and the first annular taper table is attached to and matched with the second annular taper table. According to the technical scheme, shaking of the negative pressure suction nozzle rod is reduced, and the alignment precision of the negative pressure suction nozzle and a battery liquid injection opening is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery formation, in particular to a negative pressure cup assembly. Background Art

[0002] During the manufacturing process of lithium batteries, they need to be charged and formed. However, the heat generated during the charging process will increase the temperature of the electrolyte, and the expanded electrolyte will emerge from the injection port. In order to prevent the overflowing electrolyte from spreading to the surface of the battery shell, a negative pressure cup is often used to collect the overflowing electrolyte, so the manufacturing cost of the negative pressure cup is directly related to the manufacturing cost of the entire lithium battery.

[0003] In the prior art, the negative pressure cup assembly includes a negative pressure nozzle rod, a negative pressure cup body, a negative pressure cup cover, etc. The entire negative pressure cup assembly is fixed on the needle bed through a mounting seat. However, there will be a certain installation gap when the negative pressure nozzle rod passes through the through hole connected to the mounting seat. Since the negative pressure nozzle rod is set in a long straight shape, the negative pressure nozzle rod can easily shake with the negative pressure nozzle, causing the negative pressure nozzle to be misaligned with the battery filling port, thereby resulting in formation failure. Utility Model Content

[0004] The main purpose of the utility model is to provide a negative pressure cup assembly, which aims to solve the problem that the negative pressure suction nozzle rod is easy to shake, resulting in the misalignment of the negative pressure suction nozzle and the battery filling port.

[0005] To achieve the above-mentioned purpose, the negative pressure cup assembly proposed in the present invention includes:

[0006] A negative pressure cup cover, wherein the negative pressure cup cover is provided with a through hole;

[0007] A negative pressure cup body, the negative pressure cup body having a receiving cavity, the receiving cavity being provided with a top opening and a bottom opening, the top opening being communicated with the through hole, and the bottom opening being a liquid inlet;

[0008] A negative pressure nozzle rod, the top of which extends into the bottom opening of the negative pressure cup body and is connected as one body;

[0009] A mounting seat, the mounting seat having a through hole, the negative pressure nozzle rod passing through the through hole, and the mounting seat being used to be mounted on the needle bed;

[0010] A first annular tapered platform is provided on the outer periphery of the negative pressure suction nozzle rod, and a second annular tapered platform adapted to the first annular tapered platform is formed inwardly of the mounting seat at the through hole, and the first annular tapered platform is snugly fitted with the second annular tapered platform.

[0011] Preferably, along the axial direction of the negative pressure suction nozzle rod, the first annular tapered platform and the second annular tapered platform are both arranged to be retracted downward.

[0012] Preferably, the first annular tapered platform is arranged adjacent to the negative pressure cup body, and the second annular tapered platform is located at the top of the mounting seat in the through hole.

[0013] Preferably, the through hole, the first annular tapered platform, and the second annular tapered platform have the same central axis.

[0014] Preferably, the negative pressure nozzle rod can be movably inserted into the through hole, and an installation gap is formed between the mounting seat and the negative pressure nozzle rod at the through hole. An elastic member is sleeved on the outer periphery of the negative pressure nozzle rod, and the elastic member passes through the installation gap.

[0015] Preferably, the elastic member is a spring, and the spring is sleeved on the outer circumference of the negative pressure nozzle rod.

[0016] Preferably, mounting holes are provided on both sides of the mounting seat, and the mounting holes can be penetrated by bolts for mounting on the needle bed.

[0017] Compared with the prior art, the negative pressure cup assembly of the technical solution of the utility model is provided with a first annular tapered platform on the outer periphery of the negative pressure nozzle rod and a second annular tapered platform inside the mounting seat respectively. Moreover, since the first annular tapered platform and the second annular tapered platform fit closer to each other between the negative pressure nozzle rod and the mounting seat, the mounting gap between the two is very small. In this way, even if the length of the negative pressure nozzle rod is very long, it can be ensured that the negative pressure nozzle rod will not shake. In this way, when the negative pressure nozzle on the negative pressure nozzle rod is aligned with the battery filling port, the shaking of the negative pressure nozzle rod is reduced, which can greatly improve the position accuracy between the negative pressure nozzle and the battery filling port, thereby ensuring the smooth formation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the negative pressure cup assembly of the present invention;

[0019] Figure 2 This is a structural diagram of the utility model's negative pressure cup assembly with the mounting base separated;

[0020] Figure 3 This is a cross-sectional view of the negative pressure cup assembly of the present invention.

[0021] Description of the accompanying drawings: 100, negative pressure cup cover; 200, negative pressure cup body; 300, negative pressure nozzle rod; 400, mounting seat; 310, first annular tapered platform; 410, second annular tapered platform; 420, through hole; 500, elastic member; 430, mounting hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figures 1 to 3 , the utility model proposes a negative pressure cup assembly.

[0024] The negative pressure cup assembly includes a negative pressure cup cover 100, a negative pressure cup body 200, a negative pressure suction nozzle rod 300 and a mounting seat 400. The negative pressure cup cover 100 is provided with a through hole; the negative pressure cup body 200 has a accommodating cavity, which is respectively provided with a top opening and a bottom opening, the top opening is connected to the through hole, and the bottom opening is a liquid inlet; the top of the negative pressure suction nozzle rod 300 extends into the bottom opening of the negative pressure cup body 200 and is connected as a whole; the mounting seat 400 has a through hole 420, the negative pressure suction nozzle rod 300 passes through the through hole 420, and the mounting seat 400 is used to be installed on a needle bed; the outer periphery of the negative pressure suction nozzle rod 300 is provided with a first annular tapered platform 310, and the mounting seat 400 is concave at the through hole 420 to form a second annular tapered platform 410 that is adapted to the first annular tapered platform 310, and the first annular tapered platform 310 is snugly fitted with the second annular tapered platform 410.

[0025] Specifically, the negative pressure cup cover 100 and the negative pressure cup body 200 can be connected together by ultrasonic welding or hot melting to ensure that the structure formed by the connection between the two is well sealed. The through hole on the negative pressure cup cover controls the positive pressure and negative pressure by connecting the positive pressure source and the negative pressure source. After entering the negative pressure formation process, the negative pressure source is turned on to draw the electrolyte inside the battery cell into the negative pressure cup body 200 along with the gas through the negative pressure suction nozzle rod 300 and the negative pressure suction nozzle. The electrolyte will be retained in the negative pressure cup body 200. After the negative pressure formation process is completed, the negative pressure source is turned off, and the positive pressure source is used to apply positive pressure to the negative pressure cup body 200. The electrolyte retained in the negative pressure cup body 200 is blown into the battery cell using the positive pressure, thereby realizing the reflux of the electrolyte.

[0026] When the negative pressure cup assembly of the present invention is in use, the mounting seat 400 is fixed on the needle bed, and the negative pressure cup cover 100 and the negative pressure cup body 200 are driven by the driving device on the needle bed to press the negative pressure suction nozzle rod 300 downward. By respectively providing a first annular tapered platform 310 and a second annular tapered platform 410 on the outer periphery of the negative pressure suction nozzle rod 300 and the interior of the mounting seat 400, and the first annular tapered platform 310 and the second annular tapered platform 410 fit closer and more compactly between the negative pressure suction nozzle rod 300 and the mounting seat 400, the installation gap between the two is very small. In this way, even if the length of the negative pressure suction nozzle rod 300 is very long, it can be ensured that the negative pressure suction nozzle rod 300 will not shake. In this way, when the negative pressure suction nozzle on the negative pressure suction nozzle rod 300 is aligned with the battery filling port, the shaking of the negative pressure suction nozzle rod 300 is reduced, which can greatly improve the position accuracy between the negative pressure suction nozzle and the battery filling port, thereby ensuring the smooth progress of the formation.

[0027] See also Figures 2 to 3 Preferably, along the axial direction of the suction nozzle rod 300, the first annular tapered platform 310 and the second annular tapered platform 410 are both arranged to be retracted downward. In this way, even if the suction nozzle rod 300 is long, the cooperation between the first annular tapered platform 310 and the second annular tapered platform 410 constrains the suction nozzle rod 300 and allows the suction nozzle rod 300 to be clamped by the mounting seat 400, preventing the suction nozzle rod 300 from shaking and ensuring smooth formation.

[0028] See also Figures 2 to 3 Preferably, the first annular tapered platform 310 is located near the negative pressure cup body 200, and the second annular tapered platform 410 is located at the top of the mounting base 400 within the through hole 420. In this way, the negative pressure nozzle rod 300 and the mounting base 400 are both located close to the top, and can fit together during assembly, which can further ensure that the negative pressure nozzle rod 300 does not shake and improve stability.

[0029] To ensure the stability of the negative pressure nozzle rod 300 when assembled to the mounting base 400, preferably, refer to Figures 2 to 3 The through hole 420, the first annular tapered platform 310, and the second annular tapered platform 410 have the same central axis.

[0030] See also Figures 1 to 3Preferably, the negative pressure nozzle rod 300 is movably inserted into the through hole 420, and an installation gap is formed between the mounting seat 400 and the negative pressure nozzle rod 300 at the through hole 420. An elastic member 500 is sleeved on the outer periphery of the negative pressure nozzle rod 300, and the elastic member 500 penetrates into the installation gap. In this way, when the negative pressure cup assembly is in use, the negative pressure cup assembly will be driven downward by the drive device on the needle bed, so that the negative pressure nozzle on the negative pressure cup assembly can be pressed on the liquid filling port of the battery. By providing the elastic member 500, the negative pressure nozzle can play a buffering role when pressed on the liquid filling port of the battery. At the same time, in conjunction with the first annular tapered platform 310 and the second annular tapered platform 410, the shaking of the negative pressure nozzle rod 300 is reduced, and the stability of the negative pressure nozzle on the negative pressure nozzle rod 300 in the negative pressure cup assembly pressed on the battery liquid filling port is enhanced. The elastic member 500 can be implemented in a variety of ways, as long as the elastic member 500 can enhance the stability of the negative pressure nozzle when the negative pressure nozzle is pressed against the battery filling port.

[0031] See also Figures 2 to 3 Furthermore, the elastic member 500 is a spring that is sleeved around the outer circumference of the negative pressure nozzle rod 300. The spring is directly sleeved around the outer circumference of the negative pressure nozzle rod 300. When the negative pressure nozzle rod 300 is pressed against the battery filling port, the spring elastically deforms and presses the negative pressure nozzle, so that the negative pressure nozzle is stably pressed against the battery filling port.

[0032] See also Figures 1 to 3 Preferably, mounting holes 430 are provided on both sides of the mounting base 400, through which bolts can be inserted for mounting on the needle bed. Specifically, the mounting base 400 is used to mount the negative pressure cup assembly on an external device, so that the negative pressure cup assembly can be fixed in place and maintain the stability of the electrolyte flow inside the battery.

[0033] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by utilizing the contents of the present invention specification and drawings under the practical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A negative pressure cup assembly, characterized in that: The negative pressure cup assembly includes: A negative pressure cup cover, wherein the negative pressure cup cover is provided with a through hole; A negative pressure cup body, the negative pressure cup body having a receiving cavity, the receiving cavity being provided with a top opening and a bottom opening, the top opening being communicated with the through hole, and the bottom opening being a liquid inlet; A negative pressure nozzle rod, the top of which extends into the bottom opening of the negative pressure cup body and is connected as one body; A mounting seat, the mounting seat having a through hole, the negative pressure nozzle rod passing through the through hole, and the mounting seat being used to be mounted on the needle bed; A first annular tapered platform is provided on the outer periphery of the negative pressure suction nozzle rod, and a second annular tapered platform adapted to the first annular tapered platform is formed inwardly of the mounting seat at the through hole, and the first annular tapered platform is snugly fitted with the second annular tapered platform.

2. The negative pressure cup assembly according to claim 1, characterized in that: Along the axial direction of the negative pressure suction nozzle rod, the first annular tapered platform and the second annular tapered platform are both arranged to be retracted downward.

3. The negative pressure cup assembly according to claim 2, wherein: The first annular tapered platform is disposed adjacent to the negative pressure cup body, and the second annular tapered platform is located at the top of the mounting seat in the through hole.

4. The negative pressure cup assembly according to claim 2, wherein: The through hole, the first annular tapered platform, and the second annular tapered platform have the same central axis.

5. The negative pressure cup assembly according to claim 2, wherein: The negative pressure suction nozzle rod can be movably inserted into the through hole, and an installation gap is formed between the mounting seat and the negative pressure suction nozzle rod at the through hole. An elastic member is sleeved on the outer periphery of the negative pressure suction nozzle rod, and the elastic member passes through the installation gap.

6. The negative pressure cup assembly according to claim 5, characterized in that: The elastic member is a spring, and the spring is sleeved on the outer circumference of the negative pressure nozzle rod.

7. The negative pressure cup assembly according to claim 1, wherein: Mounting holes are provided on both sides of the mounting seat, and the mounting holes can be penetrated by bolts for mounting on the needle bed.

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