Negative pressure suction nozzle device for negative pressure formation of lithium battery

Abstract

The utility model discloses a negative pressure suction nozzle device for negative pressure formation of a lithium battery, which relates to the technical field of battery production and comprises a suction nozzle body, an air passage is arranged on the suction nozzle body along the height direction in a penetrating manner, the bottom end of the air passage is abutted against a sealing ring made of an elastic material, and the sealing ring is guaranteed to be fully abutted against an air pipe and the battery. And the inner diameter of the sealing ring is not larger than the diameter of the liquid injection hole and not smaller than the diameter of the air channel. After negative pressure starting, the vacuum machine sucks out air in the battery along the air passage and the liquid injection hole, the battery shrinks under the action of air pressure to extrude electrolyte in the battery, the electrolyte ascends to penetrate through the liquid injection hole to enter the air passage, and at the moment, due to the sealing action of the sealing ring, the liquid injection hole and the sealing ring as well as the connection part of the sealing ring and the air passage are sealed, so that the electrolyte is prevented from leaking; and the production quality and efficiency of the battery are improved.

Description

Technical Field

[0001] This utility model belongs to the field of battery production technology, and specifically relates to a negative pressure suction nozzle device for lithium battery negative pressure formation. Background Technology

[0002] Lithium-ion batteries are a type of battery made using lithium metal or lithium alloys as positive and negative electrode materials and a non-aqueous electrolyte solution. Negative pressure formation is one of the key processes in lithium-ion battery production. This process begins by evacuating the lithium-ion battery to a negative pressure state, then allowing it to stand for a period of time to ensure the required negative pressure environment is achieved inside the battery, thus eliminating air and impurities.

[0003] In the traditional vacuuming process, a negative pressure suction nozzle covers the battery's electrolyte injection hole to form a sealed space, and then a vacuum is drawn from the middle of the air passage. However, this type of nozzle is prone to causing electrolyte leakage and accumulation at the connection between the nozzle and the injection hole, which can lead to crystal formation and affect the battery's production quality and efficiency. Utility Model Content

[0004] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a lithium battery negative pressure conversion negative pressure suction nozzle device to solve the problems mentioned in the background art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A negative pressure suction nozzle device for lithium battery negative pressure formation includes a suction nozzle body. The battery includes an injection port, a sealing component mounting plate, and a battery cover. An air passage is formed through the suction nozzle body along its height. A sealing ring, made of elastic material, abuts against the bottom of the air passage. The bottom of the sealing ring abuts against the sealing component mounting plate, and the connection is completely sealed. The air passage and the injection port are connected through the sealing ring, and the inner diameter of the sealing ring is no larger than the diameter of the injection port. When the negative pressure is activated, a vacuum pump draws air out of the battery along the air passage and the injection port. Under the pressure, the battery contracts and compresses the internal electrolyte. The electrolyte rises, passes through the injection port, and enters the air passage. Due to the sealing effect of the sealing ring, the injection port, the sealing ring, and the connection between the sealing ring and the air passage are all sealed, ensuring no electrolyte leakage and improving battery production quality and efficiency.

[0007] Preferably, and not less than the airway diameter.

[0008] Preferably, the inner diameter of the sealing ring, the diameter of the injection hole, and the inner diameter of the air passage are all equal to ensure smooth electrolyte flow and prevent residues at the connection points.

[0009] Preferably, the protrusion height of the sealing ring relative to the bottom surface of the negative pressure nozzle is not less than the distance between the sealing mounting plate and the battery cover.

[0010] Preferably, the central axis of the airway coincides with the central axis of the mouthpiece body.

[0011] Preferably, an adsorption element is provided on the outer ring of the bottom surface of the suction nozzle body. The bottom surface of the adsorption element is not higher than the bottom surface of the suction nozzle body. The adsorption element is adsorbed onto the top surface of the cover plate, forming a sealed space between the adsorption element and the top surface of the cover plate. This further enhances the sealing effect.

[0012] Preferably, the lower surface of the adsorption element is provided with anti-slip texture.

[0013] Preferably, multiple reinforcing ribs are provided between the adsorption element and the sealing ring to increase the stability of the sealing ring.

[0014] The distance between any two adjacent reinforcing ribs is equal.

[0015] This utility model proposes a negative pressure suction nozzle device for lithium battery negative pressure formation. The air passage and the liquid injection hole are directly connected by a sealing ring, and the connection is sealed to ensure smooth flow of electrolyte and prevent residue at the connection. This avoids electrolyte leakage and crystallization near the liquid injection hole, thereby improving the production quality and efficiency of the battery.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a lithium battery negative pressure formation negative pressure suction nozzle device proposed in this utility model;

[0018] Figure 2 This is a bottom view of a negative pressure suction nozzle device for the negative pressure formation of a lithium battery proposed in this utility model;

[0019] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0020] Figure 4 This is the right cross-section of a negative pressure suction nozzle device for the negative pressure formation of a lithium battery proposed in this utility model;

[0021] Figure 5 for Figure 4 Enlarged view of point B.

[0022] Reference numerals: 1. Nozzle body; 2. Air passage; 3. Sealing ring; 4. Adsorption component; 5. Reinforcing rib; 6. Blocking component; 7. Insert ring. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. Example

[0024] refer to Figures 1 to 3 The lithium battery negative pressure formation negative pressure suction nozzle device described in this embodiment includes a suction nozzle body 1. The suction nozzle body 1 has an air passage 2 extending through it along the height direction. The top end of the air passage 2 is connected to a vacuum machine, and the bottom end of the air passage 2 abuts against a sealing ring 3. Most batteries on the market typically include an injection hole, a sealing component mounting plate, and a battery cover. The injection hole is located on the sealing component mounting plate, which is lower than the top surface of the battery cover. The sealing ring 3 protrudes from the bottom end of the suction nozzle body 1 and abuts against the sealing component mounting plate, and the connection is completely sealed. The air passage 2 and the injection hole are connected through the sealing ring 3. The inner diameter of the sealing ring 3 is not greater than the diameter of the injection hole and not less than the diameter of the air passage 2. When the negative pressure is activated, the vacuum machine sucks out the air from the battery along the air passage 2 and the injection hole. Under the action of air pressure, the battery contracts and squeezes the electrolyte inside. The electrolyte rises and passes through the injection hole into the air passage 2. At this time, due to the sealing effect of the sealing ring 3, the injection hole and the sealing ring 3, as well as the connection between the sealing ring 3 and the air passage 2, are all sealed to ensure that the electrolyte does not leak, thereby improving the production quality and efficiency of the battery.

[0025] The sealing ring 3 is made of elastic material. The sealing ring 3 fully contacts the air passage 2 and the battery to ensure a sealing effect.

[0026] The inner wall of the sealing ring 3 is made of hydrophobic material to prevent electrolyte from remaining on the sealing ring 3 after the negative pressure formation process.

[0027] Preferably, the inner diameter of the sealing ring 3 is equal to the diameter of the injection hole. If the inner diameter of the sealing ring 3 is smaller than the diameter of the injection hole, it will easily lead to poor electrolyte flow. If the inner diameter of the sealing ring 3 is larger than the diameter of the injection hole, it will easily lead to electrolyte residue on the outer surface of the injection hole, which will crystallize on the surface of the injection hole after formation.

[0028] Preferably, the inner diameter of the sealing ring 3 is equal to the inner diameter of the air passage 2. If the inner diameter of the sealing ring 3 is smaller than the inner diameter of the air passage 2, electrolyte residue may remain at the top of the sealing ring 3 during backflow. When the nozzle is removed after formation, the residual electrolyte may drip onto the battery. If the inner diameter of the sealing ring 3 is larger than the inner diameter of the air passage 2, electrolyte flow may be obstructed.

[0029] The height difference is usually 0.1mm. To ensure the sealing effect of the sealing ring 3, the protrusion height of the sealing ring 3 relative to the bottom surface of the negative pressure nozzle is not less than the height between the injection hole and the top surface of the cover plate, so as to ensure that the sealing ring 3 can fully abut against the periphery of the injection hole.

[0030] Preferably, the central axis of the airway 2 coincides with the central axis of the nozzle body 1.

[0031] To further enhance the sealing effect, preferably, an annular adsorption element 4 is provided on the outer ring of the bottom surface of the nozzle body 1. The bottom surface of the adsorption element 4 is not higher than the bottom surface of the nozzle body 1. The adsorption element 4 is adsorbed on the top surface of the cover plate. The adsorption element 4 can be an adsorption pad, so that a sealed space is formed between the adsorption element 4 and the top surface of the cover plate.

[0032] Preferably, the lower surface of the adsorption component 4 is provided with anti-slip texture to improve the adsorption force between the nozzle and the surface of the battery cover, thereby further enhancing the sealing effect.

[0033] Preferably, multiple reinforcing ribs 5 are provided between the adsorption element 4 and the sealing ring 3 to increase the stability of the sealing ring 3.

[0034] Preferably, the distance between any two adjacent reinforcing ribs 5 is equal.

[0035] refer to Figures 4 to 5 In some embodiments, preferably, the sealing ring 3 is detachably installed at the bottom of the nozzle body 1 to facilitate the replacement and cleaning of the sealing ring 3, and to avoid increasing costs by directly discarding the nozzle after the sealing ring 3 deteriorates.

[0036] Preferably, the reinforcing rib 5 protrudes towards the sealing ring 3 and is provided with a blocking member 6. The sealing ring 3 has an insertion hole with the same shape as the blocking member 6 at the corresponding position. Since the sealing ring 3 is elastic, during installation, the sealing ring 3 and the blocking member 6 are squeezed and slid until the blocking member 6 is inserted into the insertion hole to fix the sealing ring 3.

[0037] Preferably, the lower surface of the blocking member 6 is a plane that gradually rises near the axis to facilitate the installation of the sealing ring 3.

[0038] Preferably, the bottom end of the nozzle body 1 is provided with a plug ring 7, and the top end of the corresponding sealing ring 3 is inserted into the plug ring 7, so that the position of the sealing ring 3 is more stable. Under negative pressure, the sealing ring 3 and the nozzle body 1 are more fully in contact, preventing electrolyte from overflowing at the connection.

[0039] It should be understood that the terms "center", "thickness", "upper", "lower", "front", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] 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 negative pressure suction nozzle device for lithium battery negative pressure formation, comprising a suction nozzle body (1), wherein the battery includes an injection hole, a sealing mounting plate, and a battery cover plate, characterized in that: The nozzle body (1) has an air passage (2) extending through it along the height direction. The bottom end of the air passage (2) is abutted by a sealing ring (3). The sealing ring (3) is made of elastic material. The bottom end of the sealing ring (3) abuts against the sealing component mounting plate and the connection is completely sealed. The air passage (2) and the liquid injection hole are connected through the sealing ring (3). The inner diameter of the sealing ring (3) is not greater than the diameter of the liquid injection hole.

2. The lithium battery negative pressure formation negative pressure suction nozzle device according to claim 1, characterized in that: And not less than the diameter of the airway (2).

3. The lithium battery negative pressure formation negative pressure suction nozzle device according to claim 2, characterized in that: The inner diameter of the sealing ring (3), the diameter of the injection hole, and the inner diameter of the air passage (2) are all equal.

4. The lithium battery negative pressure formation negative pressure suction nozzle device according to claim 1, characterized in that: The protrusion height of the sealing ring (3) relative to the bottom surface of the negative pressure nozzle is not less than the distance between the sealing mounting plate and the battery cover.

5. The lithium battery negative pressure formation negative pressure suction nozzle device according to claim 1, characterized in that: The central axis of the airway (2) coincides with the central axis of the mouthpiece body (1).

6. The lithium battery negative pressure formation negative pressure suction nozzle device according to claim 1, characterized in that: An adsorption element (4) is provided on the outer ring of the bottom surface of the suction nozzle body (1). The bottom surface of the adsorption element (4) is not higher than the bottom surface of the suction nozzle body (1). The adsorption element (4) is adsorbed on the top surface of the cover plate, and a sealed space is formed between the adsorption element (4) and the top surface of the cover plate.

7. The lithium battery negative pressure formation negative pressure suction nozzle device according to claim 6, characterized in that: The lower surface of the adsorption component (4) is provided with anti-slip texture.

8. The lithium battery negative pressure formation negative pressure suction nozzle device according to claim 6 or 7, characterized in that: Multiple reinforcing ribs (5) are provided between the adsorption element (4) and the sealing ring (3).

9. The lithium battery negative pressure formation negative pressure suction nozzle device according to claim 8, characterized in that: The distance between any two adjacent reinforcing ribs (5) is equal.

10. The lithium battery negative pressure formation negative pressure suction nozzle device according to claim 1, characterized in that: The inner wall of the sealing ring (3) is made of hydrophobic material.

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