Battery formation suction nozzle

Abstract

The utility model discloses a battery formation suction nozzle which comprises a suction nozzle main body and a soft ring, a negative pressure channel for leading out electrolyte is arranged in the suction nozzle main body, one end of the negative pressure channel is used for being communicated with an air pipe joint of a negative pressure device, and the other end of the negative pressure channel is used for being communicated with a liquid injection port of a battery. The suction nozzle main body is provided with a pressing and covering surface pressed and covered at a liquid injection opening of the battery; the flexible ring is arranged on the pressing and covering surface of the suction nozzle main body, the flexible ring protrudes on the pressing and covering surface of the suction nozzle main body, and the flexible ring can be in elastic contact with a liquid injection opening of the battery and surrounds the liquid injection opening of the battery. According to the technical scheme, the soft ring is combined with the suction nozzle main body to form a hard ring soft structure, so that the sealing performance of the battery formation suction nozzle to a liquid injection port of a battery can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery formation, in particular to a battery formation nozzle. Background Art

[0002] Hard-shell lithium batteries generate excess gas during the negative pressure formation process, and a negative pressure cup is typically used to expel this excess gas. The principle is as follows: the air pipe connector on the top of the negative pressure cup is connected to a vacuum pump, which extracts the air from the battery, and the electrolyte is also extracted at the same time. The negative pressure chamber inside the negative pressure cup can store some electrolyte. After the negative pressure formation is completed, the electrolyte is pumped back into the battery under the action of a slight positive pressure.

[0003] The existing negative pressure cup mainly includes a negative pressure cup body, a connecting tube and a suction nozzle. The suction nozzle is connected to the negative pressure cup body through the connecting tube. When the suction nozzle is pressed down to the battery filling port, due to the hard material of the suction nozzle itself, there may be a gap between the contact between the suction nozzle and the battery filling port, and the sealing is poor. Utility Model Content

[0004] The main purpose of the utility model is to provide a battery formation nozzle, aiming to improve the sealing performance between the nozzle and the battery liquid filling port.

[0005] To achieve the above-mentioned purpose, the battery formation nozzle proposed in the present invention comprises:

[0006] A nozzle body, wherein a negative pressure channel is provided inside the nozzle body for draining the electrolyte, one end of the negative pressure channel is connected to the air pipe connector of the negative pressure device, and the other end is connected to the liquid injection port of the battery, and the nozzle body has a pressing surface that presses on the liquid injection port of the battery;

[0007] A soft ring is arranged on the pressing surface of the nozzle body, the soft ring is raised on the pressing surface of the nozzle body, and the soft ring can elastically contact the liquid filling port of the battery and surround the liquid filling port of the battery.

[0008] Preferably, the soft ring is made of silicone.

[0009] Preferably, the nozzle body is made of EPDM rubber.

[0010] Preferably, the cross-section of the soft ring is circular.

[0011] Preferably, the soft ring is a 1 / 2 ring structure.

[0012] Preferably, the negative pressure channel includes a first negative pressure channel and a second negative pressure channel, the first end of the first negative pressure channel is used to connect to the trachea joint of the negative pressure device, the second end of the first negative pressure channel is connected to the first end of the second negative pressure channel, and the second end of the second negative pressure channel is used to connect to the liquid filling port of the battery.

[0013] Preferably, the diameter of the first negative pressure channel is larger than the diameter of the second negative pressure channel.

[0014] Preferably, the ratio of the diameter of the soft ring to the diameter of the second negative pressure channel is 2 to 3.

[0015] Preferably, the nozzle body is provided with a circular chamfer on the edge of the first negative pressure channel on the side facing away from the second negative pressure channel, and the diameter of the circular chamfer gradually increases from close to the first negative pressure channel to away from the first negative pressure channel.

[0016] Preferably, the first negative pressure channel, the second negative pressure channel, and the soft ring have the same central axis.

[0017] Compared with the prior art, the battery formation nozzle of the present invention adopts a hard body and soft ring structure by combining a soft ring with a nozzle body. The soft ring surrounds the battery filling port and makes elastic contact with the battery filling port. Since the hardness of the soft ring is much smaller than that of the nozzle body, compared with the traditional structure in which the entire nozzle has a very high hardness, the battery formation nozzle of the present invention can well seal the battery filling port, prevent the electrolyte from flowing out of the battery formation nozzle during negative pressure operation, and improve the sealing performance of the battery formation nozzle to the battery filling port. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the battery formation nozzle of the utility model;

[0019] Figure 2 This is a cross-sectional view of the battery formation nozzle of the present invention.

[0020] Description of the accompanying drawings: 100, nozzle body; 110, negative pressure channel; 120, pressure covering surface; 200, soft ring; 111, first negative pressure channel; 112, second negative pressure channel; 113, circular chamfer. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figures 1 to 2 The utility model provides a battery formation nozzle.

[0023] The battery formation nozzle includes a nozzle body 100 and a soft ring 200. A negative pressure channel 110 for draining electrolyte is provided inside the nozzle body 100. One end of the negative pressure channel 110 is used to connect to the air pipe joint of the negative pressure device, and the other end is used to connect to the liquid filling port of the battery. The nozzle body 100 has a pressing surface 120 pressed on the liquid filling port of the battery; the soft ring 200 is arranged on the pressing surface 120 of the nozzle body 100. The soft ring 200 protrudes on the pressing surface 120 of the nozzle body 100. The soft ring 200 can elastically contact the liquid filling port of the battery and surround the liquid filling port of the battery.

[0024] Specifically, during the battery formation process, one end of the negative pressure channel 110 of the nozzle body 100 is aligned with the battery's liquid injection port, and the other end of the negative pressure channel 110 is connected to the air pipe connector of the negative pressure device to generate negative pressure, causing negative pressure to be generated in the negative pressure channel 110. This generates suction in the negative pressure channel 110, sucking the electrolyte out through the battery's liquid injection port and negative pressure channel 110 in sequence, and the electrolyte is retained in the negative pressure channel 110. When the electrolyte needs to be returned to the battery, the negative pressure device can be operated to generate positive pressure in the negative pressure channel 110, allowing it to flow back into the battery. The battery formation nozzle of the present invention adopts a soft ring 200 in combination with the nozzle body 100 to form a hard body and soft ring structure. The soft ring 200 surrounds the battery filling port and makes elastic contact with the battery filling port. Since the hardness of the soft ring 200 is much smaller than that of the nozzle body 100, compared with the traditional nozzle structure with a very high hardness of the entire hardness, the battery formation nozzle of the present invention can well seal the battery filling port, prevent the electrolyte from flowing out of the battery formation nozzle during negative pressure operation, and improve the sealing performance of the battery formation nozzle to the battery filling port.

[0025] Preferably, the flexible ring 200 is made of silicone. By using silicone as the material, the flexible ring 200 takes advantage of its softness and electrolyte resistance. This prevents corrosion of the flexible ring 200 by the electrolyte when the battery formation nozzle draws out the electrolyte from the battery, thereby improving the sealing performance of the flexible ring 200 around the battery's liquid filling port. Furthermore, due to the silicone's softness, when the battery formation nozzle is pressed against the battery's liquid filling port, the silicone on the nozzle elastically contacts the area around the battery's liquid filling port, effectively sealing the area around the battery's liquid filling port and preventing the electrolyte from escaping.

[0026] Preferably, the material of the suction nozzle body 100 is EPDM rubber. Specifically, EPDM rubber is a copolymer of ethylene, propylene and a small amount of non-conjugated diene, and has excellent aging resistance such as ozone resistance, heat resistance, weather resistance, etc., which can increase the service life of the suction nozzle. And the hydrophilicity of EPDM rubber can be used to enhance the adhesion of the suction nozzle to the electrolyte and slow down the movement of the electrolyte. In this way, the suction nozzle body 100 made of EPDM rubber and the soft ring 200 made of silicone material are combined to form a hard body and soft ring structure. The combination between the two can be modified by additives, such as adding surfactants, modified silicone, modified EPDM rubber, etc., to improve the compatibility and miscibility between them. In addition, the combination of the two can also be achieved by using coating methods, additive methods, adhesives and other technologies, which will not be described one by one here.

[0027] See also Figures 1 to 2 Preferably, the flexible ring 200 is circular. The flexible ring 200 may also be in other shapes, such as rectangular, oval, or other regular shapes. All are acceptable, as long as the flexible ring 200 can surround the battery filling port when the battery formation nozzle is pressed against the battery filling port, sealing the battery filling port to prevent the electrolyte from escaping.

[0028] See also Figures 1 to 2 Preferably, the soft ring 200 is a 1 / 2 ring structure. It is similar to a ring structure with the upper and lower parts evenly cut off, so that the soft ring 200 of the ring is raised on the nozzle body 100 to ensure the sealing effect of the two.

[0029] See also Figures 1 to 2Preferably, the negative pressure channel 110 includes a first negative pressure channel 111 and a second negative pressure channel 112. The first end of the first negative pressure channel 111 is used to connect to the air pipe joint of the negative pressure device, the second end of the first negative pressure channel 111 is connected to the first end of the second negative pressure channel 112, and the second end of the second negative pressure channel 112 is used to connect to the liquid injection port of the battery. Specifically, the first negative pressure channel 111 is connected to the negative pressure device, and the operation of the negative pressure device causes the second negative pressure channel 112 to generate negative pressure, so that suction is generated at the liquid suction port to suck out the electrolyte through the liquid injection port and the second negative pressure channel 112 of the battery in sequence. The electrolyte will remain in the second negative pressure channel 112. Even if the electrolyte inside the second negative pressure channel 112 flows back, the electrolyte will remain in the liquid return gap to prevent the electrolyte from flowing out of the liquid suction port.

[0030] See also Figures 1 to 2 Preferably, the diameter of the first negative pressure channel 111 is larger than the diameter of the second negative pressure channel 112. In this way, the air pipe connector of the negative pressure device can abut against the first negative pressure channel 111, generating negative pressure to suck out the electrolyte in the second negative pressure channel 112.

[0031] See also Figures 1 to 2 Preferably, the ratio of the diameter of the flexible ring 200 to the diameter of the second negative pressure channel 112 is 2 to 3. The specific ratio can be selected according to actual conditions. In this way, when the battery formation nozzle is pressed against the battery's liquid filling port, the diameter of the flexible ring 200 on the battery formation nozzle can be ensured to be large enough to surround the battery's liquid filling port and ensure a sealing effect.

[0032] See also Figures 1 to 2 Preferably, the nozzle body 100 has a circular chamfer 113 on the edge of the first negative pressure channel 111 facing away from the second negative pressure channel 112. The diameter of the circular chamfer 113 gradually increases from closer to the first negative pressure channel 111 to farther away from the first negative pressure channel 111. This arrangement allows for axial positioning of the air pipe connector of the negative pressure device, facilitating installation and removal of the air pipe connector.

[0033] See also Figures 1 to 2 Preferably, the first negative pressure channel 111, the second negative pressure channel 112, and the soft ring 200 have the same central axis.

[0034] 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 battery formation nozzle, characterized in that: The battery formation nozzle comprises: A nozzle body, wherein a negative pressure channel is provided inside the nozzle body for draining the electrolyte, one end of the negative pressure channel is connected to the air pipe connector of the negative pressure device, and the other end is connected to the liquid injection port of the battery, and the nozzle body has a pressing surface that presses on the liquid injection port of the battery; A soft ring is arranged on the pressing surface of the nozzle body, the soft ring is raised on the pressing surface of the nozzle body, and the soft ring can elastically contact the liquid filling port of the battery and surround the liquid filling port of the battery.

2. The battery formation nozzle according to claim 1, wherein: The material of the soft ring is silicone.

3. The battery formation nozzle according to claim 2, wherein: The nozzle body is made of EPDM rubber.

4. The battery formation nozzle according to claim 1, wherein: The cross-section of the soft ring is circular.

5. The battery formation nozzle according to claim 4, wherein: The soft ring is a 1 / 2 ring structure.

6. The battery formation nozzle according to claim 4, wherein: The negative pressure channel includes a first negative pressure channel and a second negative pressure channel. The first end of the first negative pressure channel is used to connect to the trachea joint of the negative pressure device, the second end of the first negative pressure channel is connected to the first end of the second negative pressure channel, and the second end of the second negative pressure channel is used to connect to the liquid filling port of the battery.

7. The battery formation nozzle according to claim 6, wherein: A diameter of the first negative pressure channel is greater than a diameter of the second negative pressure channel.

8. The battery formation nozzle according to claim 6, wherein: The ratio of the diameter of the soft ring to the diameter of the second negative pressure channel is 2 to 3.

9. The battery formation nozzle according to claim 6, wherein: The nozzle body has an edge with a circular chamfer on the side of the first negative pressure channel facing away from the second negative pressure channel, and the diameter of the circular chamfer gradually increases from close to the first negative pressure channel to away from the first negative pressure channel.

10. The battery formation nozzle according to claim 6, wherein: The first negative pressure channel, the second negative pressure channel, and the soft ring have the same central axis.

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