A waste liquid cup and a formation equipment

Abstract

This application discloses a waste liquid cup and a formation device, including a cup body and an elastic sealing member. The cup body has a cavity and a liquid guiding hole communicating with it. The elastic sealing member is disposed within the cavity and includes an interconnected mounting portion and a sealing portion. The mounting portion is connected to the cup body, and the sealing portion extends to the liquid guiding hole. The sealing portion can approach or move away from the liquid guiding hole to seal or unseal it. This waste liquid cup can open or seal the liquid guiding hole according to changes in the amount of gas generated inside the battery cell, thereby achieving both venting of the battery cell and reducing the risk of electrolyte dripping onto the battery cell or other equipment, leading to contamination and corrosion.

Description

Technical Field

[0001] This application belongs to the field of battery formation technology, specifically relating to a waste liquid cup and formation equipment. Background Technology

[0002] In related technologies, formation is the process of charging the battery with a small current after electrolyte injection. Formation generates a large amount of waste gas. During the collection of waste gas, the electrolyte will enter the waste liquid cup with the waste gas and condense, and then flow back into the battery cell. When the waste liquid cup is separated from the battery cell, some electrolyte may drip from the outlet of the waste liquid cup onto the battery cell or equipment, causing pollution and corrosion. Utility Model Content

[0003] This application aims to provide a waste liquid cup and a formation device that can solve the problem that when the waste liquid cup is separated from the battery cell, some electrolyte may drip from the outlet of the waste liquid cup onto the battery cell or device, causing pollution and corrosion.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] In a first aspect, embodiments of this application propose a waste liquid cup, including a cup body and an elastic sealing member. The cup body has a cavity and a liquid guiding hole that communicates with the cavity. The elastic sealing member is disposed in the cavity and includes an installation part and a sealing part connected to each other. The installation part is connected to the cup body, and the sealing part extends to the liquid guiding hole. The sealing part can approach or move away from the liquid guiding hole to seal or unseal the liquid guiding hole.

[0006] Optionally, the cavity has an opening and a bottom wall, and the liquid guiding hole is provided through the bottom wall; the bottom wall has a protrusion at the position of the liquid guiding hole, and the protrusion extends from the bottom wall toward the opening; along the direction of the bottom wall toward the opening, the liquid guiding hole passes through the protrusion to form a through hole on the protrusion, and the sealing part is used to cover the protrusion to seal the through hole.

[0007] Optionally, the bottom wall is provided with a plurality of mounting positions, which are located on a circular trajectory with the center of the liquid guiding hole as the center, and the mounting part is connected to at least one of the mounting positions.

[0008] Optionally, the bottom wall is further provided with a plurality of stiffening plates, one end of which is connected to the bottom wall and the other end of which extends toward the cavity opening, and the plurality of stiffening plates are arranged crosswise and connected to each other.

[0009] Optionally, the end of the protrusion facing away from the bottom wall is higher than the end of the rib facing away from the bottom wall.

[0010] Optionally, the bottom wall is further provided with a limiting structure, and the elastic sealing member further includes a connecting portion disposed between the mounting portion and the sealing portion, the connecting portion being at least partially located on the line connecting the liquid guiding hole and the mounting position, and the limiting structure being located on opposite sides of the line connecting the liquid guiding hole and the mounting position;

[0011] And / or, the mounting part includes at least two sub-mounting parts, the connecting part includes at least two sub-connecting parts, the at least two sub-connecting parts are respectively connected to the sealing part, each sub-mounting part is connected to one sub-connecting part, each sub-mounting part is correspondingly connected to one mounting position, and the fan-shaped angle formed by each sub-mounting part with the center of the liquid guiding hole as the center is less than a degree.

[0012] Optionally, it also includes a counterweight, which is disposed on the sealing part and fixedly connected to the sealing part.

[0013] Optionally, the sealing part is provided with a receiving cavity, and the counterweight is embedded in the receiving cavity.

[0014] Optionally, it also includes a liquid guide tube connected to the cup body, the liquid guide tube having a flow channel that communicates with the liquid guide hole.

[0015] Secondly, embodiments of this application provide a formation apparatus, including the waste liquid cup described in any of the above claims.

[0016] In the embodiments of this application, the waste liquid cup can be connected to the formation equipment and the battery cell to form a negative pressure separation system. The liquid guide hole of the waste liquid cup is connected to the battery cell to form a connected channel. Since the pressure of the waste gas generated inside the battery cell is higher than the pressure inside the cup, the waste gas generated by the battery cell can push the sealing part at the liquid guide hole and move the sealing part away from the liquid guide hole, thereby opening the liquid guide hole. A part of the electrolyte enters the cup with the waste gas and condenses back to the bottom of the cup. As the waste gas is extracted, the pressure inside the battery cell gradually decreases, and the pushing force of the waste gas gradually decreases. When the pushing force of the waste gas can no longer push up the sealing part, the sealing part gradually approaches and abuts against the liquid guide hole, thereby sealing the liquid guide hole and preventing the electrolyte inside the cup from flowing out of the liquid guide hole. During the formation process, the waste liquid cup can open and seal the liquid guide hole through the sealing part of the elastic sealing component, thereby realizing the discharge of waste gas and preventing the electrolyte from flowing out of the waste liquid cup along the liquid guide hole, reducing the possibility of electrolyte dripping onto the battery cell or equipment, and reducing the possibility of pollution and corrosion.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below, wherein:

[0019] Figure 1 This is a schematic diagram of the connection structure between the waste liquid cup and the battery cell provided in one embodiment of this application;

[0020] Figure 2 A three-dimensional structural diagram of a waste liquid cup provided in an embodiment of this application;

[0021] Figure 3 One of the schematic diagrams of the installation structure of the cup body and the elastic sealing member provided in an embodiment of this application;

[0022] Figure 4 This is one of the structural schematic diagrams of the bottom wall of the cup body provided in an embodiment of this application;

[0023] Figure 5 A second schematic diagram of the installation structure of the cup body and the elastic sealing member provided in an embodiment of this application;

[0024] Figure 6 This is a second schematic diagram of the structure of the cup body corresponding to the bottom wall in an embodiment of this application;

[0025] Figure 7 One of the three-dimensional structural schematic diagrams of an elastic sealing member provided in an embodiment of this application;

[0026] Figure 8 This is a second three-dimensional structural schematic diagram of an elastic sealing member provided in an embodiment of this application.

[0027] Figure label:

[0028] 10. Battery cell; 100. Cup body; 110. Cavity; 112. Cavity opening; 114. Bottom wall; 120. Liquid guide hole; 130. Cover plate; 140. Mounting position; 150. Rib plate; 160. Protrusion; 170. Limiting structure; 180. Liquid guide tube; 200. Elastic sealing element; 210. Mounting part; 211. Sub-mounting part; 220. Sealing part; 230. Connecting part; 231. Sub-connecting part; 240. Counterweight; 300. Connecting assembly; 310. Connecting block; 311. Through hole; 312. Connecting hole; 320. Spring; 330. Nut; 400. Injection nozzle. Detailed Implementation

[0029] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals 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 application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0030] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0031] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] Before providing a detailed description of the waste liquid cup and formation equipment provided in the embodiments of this application, the specific application scenarios of the waste liquid cup and formation equipment will be explained in detail:

[0034] During the battery manufacturing process, the battery cells need to be formed. During the formation process, formation equipment and waste liquid cups are used to collect the waste gas and electrolyte generated by the cells. After the electrolyte enters the waste liquid cup, it condenses and easily drips onto the cells along the liquid guiding holes.

[0035] The waste liquid cup and formation equipment provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0036] like Figures 1 to 4 As shown, a waste liquid cup according to some embodiments of this application includes a cup body 100 and an elastic sealing member 200. The cup body 100 has a cavity 110 and a liquid guiding hole 120 that communicates with the cavity 110. The elastic sealing member 200 is disposed in the cavity 110 and includes an installation part 210 and a sealing part 220 that are connected to each other. The installation part 210 is connected to the cup body 100, and the sealing part 220 extends to the liquid guiding hole 120. The sealing part 220 can approach or move away from the liquid guiding hole 120 to seal or unseal the liquid guiding hole 120.

[0037] In this embodiment, the liquid guide hole 120 of the waste liquid cup is connected to the battery cell 10 to form a communicating channel. Since the pressure of the gas generated inside the battery cell 10 is higher than the pressure inside the cup body 100, the gas generated by the battery cell 10 can push the sealing part 220 at the liquid guide hole 120 and move the sealing part 220 away from the liquid guide hole 120, thereby opening the liquid guide hole 120. The gas inside the battery cell 10 will enter the cup body 100 through the liquid guide hole 120, and at the same time, a part of the electrolyte will enter the cup body 100 with the gas. The electrolyte condenses and falls back to the bottom of the cup body 100. As the gas is extracted, the pressure inside the cell 10 decreases, and the gas thrust gradually decreases. When the gas thrust is insufficient to push up the sealing part 220, the sealing part 220 approaches the liquid guide hole 120 and abuts against the cup body 100 surrounding the liquid guide hole 120, thereby sealing the liquid guide hole 120 and preventing the electrolyte in the cup body 100 from flowing out of the liquid guide hole 120. In this way, the liquid guide hole 120 can be opened or sealed by the sealing part 220 of the elastic sealing member 200 according to the change in the amount of gas generated inside the cell 10. This achieves both the venting effect of the cell 10 and reduces the risk of electrolyte dripping onto the cell 10 or other equipment, which could lead to contamination and corrosion.

[0038] In addition, the waste liquid cup reduces the outflow of electrolyte from the liquid guiding hole 120, thereby reducing the possibility of electrolyte crystallization at the connection port of the battery cell 10, ensuring the effective gas extraction area, and ensuring the smooth and effective progress of the battery cell processing.

[0039] like Figure 2 and Figure 4As shown, the cup body 100 has a cavity 110 and a liquid guiding hole 120. The liquid guiding hole 120 is connected to the cavity 110. So after the cup body 100 is connected to the battery cell 10, the gas generated in the battery cell 10 can pass through the liquid guiding hole 120 and enter the cup body 100. At the same time, the electrolyte carried in the gas condenses in the cup body 100 and drips into the cup body 100, realizing the collection of the overflowing electrolyte.

[0040] like Figure 3 , Figure 4 and Figure 7 As shown, the elastic sealing member 200 is disposed in the cavity 110. The elastic sealing member 200 includes an installation part 210 and a sealing part 220 that are connected to each other. The installation part 210 is connected to the cup body 100, so that the elastic sealing member 200 is installed in the cup body 100.

[0041] In some embodiments, the mounting part 210 can be installed into the cup body 100 by a fixed connection (e.g., adhesive bonding) or a detachable connection. For example, a mounting hole can be provided in the mounting part 210 so that a screw passes through the mounting hole and connects to the cup body 100, thereby achieving a detachable connection between the mounting part 210 and the cup body 100. Of course, other connection methods can also be used, and can be flexibly set according to actual needs. This application embodiment does not limit this.

[0042] like Figure 3 , Figure 4 and Figure 7As shown, the sealing part 220 extends to the position of the liquid guiding hole 120. In use, the liquid guiding hole 120 in the cup body 100 is connected to the battery cell 10. When gas is generated inside the battery cell 10, the pressure inside the battery cell 10 is higher than the pressure inside the cup body 100. Under the action of pressure difference, the gas generated by the battery cell 10 can push open the sealing part 220, so that the battery cell 10 can communicate with the cavity 110 in the cup body 100 through the liquid guiding hole 120, so as to discharge the gas inside the battery cell 10. At the same time, the cup body 100 can also collect the electrolyte carried out by the gas in the battery cell 10. The electrolyte condenses and flows back to the bottom of the cup body 100. As the pressure inside the battery cell 10 decreases, the pressure difference between the battery cell 10 and the cup 100 gradually decreases, and the thrust generated by the gas gradually decreases. This allows the sealing part 220 to gradually approach and abut against the liquid guide hole 120, thus sealing the liquid guide hole 120 and preventing the electrolyte in the cup 100 from flowing out of the liquid guide hole 120. When the waste liquid cup is connected to the formation equipment and the battery cell 10, a large amount of gas is generated inside the battery cell 10, which pushes open the sealing part 220. As the formation process proceeds, the pressure inside the battery cell 10 decreases, and the thrust generated by the gas gradually decreases. This allows the sealing part 220 to gradually approach the liquid guide hole 120 and abut against the cup 100 around the liquid guide hole 120, thus sealing the liquid guide hole 120 and preventing the electrolyte in the cup 100 from flowing out of the liquid guide hole 120, avoiding contamination of the formation equipment and the battery cell 10.

[0043] In some embodiments, the elastic sealing element 200 may be made of ethylene propylene diene monomer (EPDM) rubber with a Shore hardness of 40 to 50, possessing a certain degree of hardness and elasticity. EPDM is a terpolymer of ethylene, propylene, and a non-conjugated diene, exhibiting good corrosion resistance and electrical insulation. It can be immersed in electrolyte for extended periods without corrosion or damage, thereby effectively sealing the liquid guiding hole 120 for a prolonged time and preventing electrolyte from flowing out of the liquid guiding hole 120.

[0044] For example, the mass of the sealing part 220 can be approximately 3g, and the diameter of the liquid guiding hole 120 can be 3mm. When formation begins, a large amount of gas is generated inside the cell 10, and the thrust generated by the gas is significant, which can push the sealing part 220 up, thereby moving the sealing part 220 away from the liquid guiding hole 120, opening the liquid guiding hole 120, and allowing gas and electrolyte to enter the cup body 100. As formation proceeds, the gas inside the cell 10 is continuously extracted, and the pressure difference between the inside of the cell 10 and the inside of the cup body 100 gradually decreases. When the pressure difference between the inside of the cell 10 and the inside of the cup body 100 decreases to approximately 0.045MPa, the thrust generated by the gas is basically equal to the weight of the sealing part 220. At this point, the formation process is basically over, and the sealing part 220 comes into contact with the liquid guiding hole 120, thus sealing the liquid guiding hole 120.

[0045] Optionally, such as Figure 2 and Figure 4As shown, the cavity 110 has an opening 112 and a bottom wall 114. A liquid guide hole 120 is provided through the bottom wall 114. The bottom wall 114 has a protrusion 160 at the position of the liquid guide hole 120. The protrusion 160 extends from the bottom wall 114 toward the opening 112. Along the direction of the bottom wall 114 toward the opening 112, the liquid guide hole 120 passes through the protrusion 160 to form a through hole on the protrusion 160. A sealing part 220 is used to cover the protrusion 160 to seal the through hole. That is, the liquid guide hole 120 is sealed by sealing the through hole of the protrusion 160 through the sealing part 220.

[0046] In this embodiment, the protrusion 160 protrudes into the cavity 110 relative to the bottom wall 114, and the liquid guiding hole 120 penetrates the protrusion 160, allowing the electrolyte to flow back onto the bottom wall 114 after condensation. The electrolyte on the bottom wall 114 is blocked by the protrusion 160, making it difficult for it to flow out of the liquid guiding hole 120, thereby reducing the possibility of electrolyte flowing out of the liquid guiding hole 120.

[0047] Specifically, such as Figure 2 and Figure 4 As shown, the cavity 110 has opposing openings 112 and a bottom wall 114, forming a space for containing electrolyte. At the location of the electrolyte guide hole 120, the bottom wall 114 has a protrusion 160, which extends from the bottom wall 114 toward the opening 112, and is convex relative to the bottom wall 114. The electrolyte guide hole 120 extends through the protrusion 160 along the bottom wall 114 toward the opening 112 to form a through hole, thus connecting the electrolyte guide hole 120 to the cavity 110. A sealing portion 220 covers the through hole of the protrusion 160, sealing the electrolyte guide hole 120. The electrolyte on the bottom wall 114 is blocked by the protrusion 160, making it difficult for it to flow out of the electrolyte guide hole 120.

[0048] In some embodiments, such as Figure 2 As shown, the cavity 112 is provided with a cup lid 130, which can be connected to the cup body 100 by bolts, and a sealing ring is provided between the two to achieve a seal.

[0049] Optionally, such as Figure 4 As shown, the bottom wall 114 is provided with a plurality of mounting positions 140, which are located on a circular trajectory with the center of the liquid guide hole 120 as the center, and the mounting part 210 is connected to at least one of the mounting positions 140.

[0050] In this embodiment, by providing multiple mounting positions 140 on the bottom wall 114, the mounting part 120 can be installed from multiple positions. When one of the mounting positions 140 is damaged, the mounting part 210 can select other mounting positions 140 for installation, so that the waste liquid cup can continue to undergo formation and extend the service life of the waste liquid cup.

[0051] Among them, such as Figure 4 As shown, the bottom wall 114 is provided with multiple mounting positions 140, which are used to mount the mounting part 210, thus enabling the mounting part 210 to be installed. The multiple mounting positions 140 are located on a circular trajectory centered on the center of the liquid guiding hole 120, ensuring that the distances between these mounting positions 140 and the liquid guiding hole 120 are all equal. The mounting part 210 is connected to at least one of the mounting positions 140. The number of mounting parts 210 installed on the mounting positions 140 can be selected according to the specific structure; this embodiment does not limit this.

[0052] In addition, such as Figure 4 and Figure 6 As shown, the liquid guide hole 120 can be located at an off-center position on the bottom wall 114 (i.e., approximately near the edge of the bottom wall 114) to avoid potential component interference when the waste liquid cup is connected to the formation equipment. Multiple mounting positions 140 are arranged with the center of the liquid guide hole 120 as the center, and the angle of distribution is less than 180 degrees. For example, Figure 4 The diagram shows three mounting positions 140, which are arranged in a circle with the center of the liquid guide hole 120 as the center. The angle of the three mounting positions 140 is approximately 120 degrees, and the angle between two adjacent mounting positions 140 is approximately 60 degrees, so that the three mounting positions 140 are evenly distributed and the structure is reasonable.

[0053] Optionally, such as Figure 4 As shown, the bottom wall 114 is also provided with a plurality of stiffening plates 150. One end of the stiffening plate 150 is connected to the bottom wall 114, and the other end of the stiffening plate 150 extends toward the cavity 112. The plurality of stiffening plates 150 are arranged crosswise and connected to each other.

[0054] In this embodiment, multiple stiffeners 150 are provided on the bottom wall 114. The stiffeners 150 have a certain height relative to the bottom wall 114. The multiple stiffeners 150 are arranged crosswise and connected to each other to form a grid structure. After the electrolyte condenses, it flows back into the grid, reducing the possibility of the electrolyte flowing out from the liquid guiding hole 120.

[0055] Among them, such as Figure 4 As shown, the bottom wall 114 is also provided with a plurality of stiffening plates 150. One end of the stiffening plate 150 is connected to the bottom wall 114, and the other end of the stiffening plate 150 extends toward the cavity 112. The plurality of stiffening plates 150 are arranged in a cross pattern and connected to each other. The specific number of stiffening plates 150 and the shape of the grid formed by the cross pattern (such as triangles and quadrilaterals) can be flexibly set according to the actual situation. This application embodiment does not limit this.

[0056] Optionally, such as Figure 3 and Figure 4As shown, the end of the protrusion 160 that is away from the bottom wall 114 is higher than the end of the stiffener 150 that is away from the bottom wall 114.

[0057] In this embodiment, when the elastic sealing member 200 falls back, it first contacts the protrusion 160, so that the elastic sealing member 200 effectively seals the liquid guiding hole 120, achieving a good seal and preventing gaps from forming between the elastic sealing member 200 and the protrusion 160, thus preventing electrolyte from flowing out of the liquid guiding hole 120.

[0058] Among them, such as Figure 3 and Figure 4 As shown, the end of the protrusion 160 facing away from the bottom wall 114 is higher than the end of the rib 150 facing away from the bottom wall 114. With the bottom wall 114 as a reference, the distance between the end of the protrusion 160 facing away from the bottom wall 114 and the bottom wall 114 is greater than the distance between the end of the rib 150 facing away from the bottom wall 114 and the bottom wall 114. This can be understood as the protrusion 160 being higher than the rib 150, with the bottom wall 114 as a reference.

[0059] For example, the protrusion 160 may be 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm or 3mm higher than the stiffener 150, and the specific value can be determined according to the actual situation. This application embodiment does not limit this.

[0060] Optionally, such as Figure 6 and Figure 7 As shown, the bottom wall 114 is also provided with a limiting structure 170, and the elastic sealing member 200 also includes a connecting part 230 provided between the mounting part 210 and the sealing part 220. The connecting part 230 is at least partially located on the line connecting the liquid guiding hole 120 and the mounting position 140, and the limiting structure 170 is located on opposite sides of the line connecting the liquid guiding hole 120 and the mounting position 140.

[0061] In this embodiment of the application, the limiting structure 170 can limit at least a portion of the connecting portion 230 to prevent at least a portion of the connecting portion 230 from deviating from the line connecting the liquid guide hole 120 and the mounting position 140, thereby preventing the entire connecting portion 230 and the elastic sealing member 200 from deviating, thereby ensuring that the sealing portion 220 effectively seals the liquid guide hole 120.

[0062] Among them, such as Figure 5 and Figure 6As shown, the bottom wall 114 is also provided with a limiting structure 170, and the elastic sealing member 200 also includes a connecting portion 230 disposed between the mounting portion 210 and the sealing portion 220, the connecting portion 230 connecting the mounting portion 210 and the sealing portion 220. The connecting portion 230 is at least partially located on the line connecting the liquid guiding hole 120 and the mounting position 140, and the limiting structure 170 is located on opposite sides of the line connecting the liquid guiding hole 120 and the mounting position 140, thereby limiting at least a portion of the connecting portion 230.

[0063] In some embodiments, the limiting structure 170 may be two opposing baffles connected to the bottom wall 114, forming a limiting space between the two opposing baffles. At least a portion of the connecting portion 230 is located within the limiting space, thereby limiting the connecting portion 230. Alternatively, the limiting structure 170 may be a groove directly formed on the bottom wall 114, with at least a portion of the connecting portion 230 located within the groove, thus limiting the connecting portion 230. Of course, the limiting structure 170 may also be configured in other ways, and this embodiment does not limit its implementation.

[0064] Optionally, such as Figure 8 As shown, the mounting part 210 includes at least two sub-mounting parts 211, and the connecting part 230 includes at least two sub-connecting parts 231. The at least two sub-connecting parts 231 are respectively connected to the sealing part 220. Each sub-mounting part 211 is connected to one sub-connecting part 231, and each sub-mounting part 211 is correspondingly connected to one mounting position 140. The fan-shaped angle formed by each sub-mounting part 211 with the center of the liquid guiding hole 120 as the center is less than 180 degrees.

[0065] In this embodiment, the entire mounting part 210 is installed on at least two mounting positions 140 through at least two sub-mounting parts 211, so that the mounting part 210 has multiple mounting points and the installation is more secure.

[0066] The mounting portion 210 includes at least two sub-mounting portions 211, and the connecting portion 230 includes at least two sub-connecting portions 231. Each of the at least two sub-connecting portions 231 is connected to the sealing portion 220. Each sub-mounting portion 211 is connected to one sub-connecting portion 231, thereby achieving the connection between the sub-mounting portion 211 and the sealing portion 220. Each sub-mounting portion 211 is connected to a corresponding mounting position 140. The fan-shaped angle formed by each sub-mounting portion 211 with the center of the liquid guiding hole 120 as the center is less than 180 degrees. It should be noted that the "fan-shaped angle" here refers to the angle between the center of the outermost two sub-mounting portions 211 and the center of the sealing portion 220. For example, as shown... Figure 8As shown, there are two sub-mounting parts 211 and two sub-connecting parts 231. The entire elastic sealing member 200 generally forms a V-shaped structure. The two sub-mounting parts 211 are respectively installed on the two mounting positions 140, so that the elastic sealing member 200 is installed in a triangular form, making the structure more stable.

[0067] Optionally, such as Figure 7 As shown, the waste liquid cup also includes a counterweight 240, which is disposed on the sealing part 220 and fixedly connected to the sealing part 220.

[0068] In this embodiment of the application, by providing a counterweight 240 in the sealing part 220, the weight of the sealing part 220 can be increased to a certain extent, so that the sealing part 220 can better abut against the liquid guiding hole 120.

[0069] Among them, such as Figure 7 As shown, the waste liquid cup also includes a counterweight 240, which is disposed on the sealing part 220 and fixedly connected to the sealing part 220. The counterweight 240 and the sealing part 220 can be directly connected or indirectly connected, and this application embodiment does not limit this.

[0070] Optionally, such as Figure 7 As shown, the sealing part 220 is provided with a receiving cavity, and the counterweight 240 is embedded in the receiving cavity.

[0071] In this embodiment, by placing the counterweight 240 within the receiving cavity of the sealing portion 220, the sealing portion 220 encloses the counterweight 240, preventing the counterweight 240 from contacting the electrolyte and reducing the possibility of corrosion. Simultaneously, the counterweight 240's action allows the sealing portion 220 to more tightly seal the liquid guiding hole 120, thereby improving the sealing effect.

[0072] Among them, such as Figure 7 As shown, the sealing part 220 has a receiving cavity, and the counterweight 240 is embedded in the receiving cavity. The receiving cavity can be an integral closed cavity structure, or it can be a cavity structure with an opening and a cover. This application embodiment does not limit this.

[0073] For example, the counterweight 240 may be made of a corrosion-resistant metal, such as SUS316 stainless steel, and the counterweight 240 may be wrapped inside the sealing part 220 using an adhesive coating process.

[0074] Optionally, such as Figure 2 and Figure 3 As shown, the waste liquid cup also includes a liquid guide tube 180, which is connected to the cup body 100. The liquid guide tube 180 is provided with a flow channel, which is connected to the liquid guide hole 120.

[0075] In this embodiment, the cell 10 can be connected to the liquid guide hole 120 through the liquid guide tube 180, thereby connecting the entire cup body 100 with the formation equipment and the cell 10.

[0076] Among them, such as Figure 2 and Figure 3 As shown, the waste liquid cup also includes a liquid guide tube 180, which is connected to the cup body 100. The liquid guide tube 180 is provided with a flow channel, which is connected to the liquid guide hole 120. The liquid guide tube 180 and the cup body 100 can be an integral structure or a separate structure. This application embodiment does not limit this.

[0077] Optionally, embodiments of this application also provide a formation apparatus, including the waste liquid cup from the above embodiments.

[0078] In this embodiment, the formation equipment includes a waste liquid cup. During the formation operation, the liquid guide hole 120 of the waste liquid cup can be connected to the battery cell 10. The liquid guide hole 120 can be opened or blocked by the sealing part 220 of the elastic sealing member 200 in the waste liquid cup, thereby venting the gas generated inside the battery cell 10. At the same time, the cup body 100 can collect the electrolyte carried by the gas, avoiding the risk of pollution and corrosion caused by the overflowing electrolyte dripping onto the battery cell 10 or the formation equipment.

[0079] In some embodiments, such as Figure 1 and Figure 2 As shown, the waste liquid cup also includes a liquid injection nozzle 400. One end of the liquid injection nozzle 400 is connected to the end of the liquid guide tube 180 away from the cup body 100, and the other end of the liquid injection nozzle 400 is connected to the battery cell 10. The liquid injection nozzle 400 facilitates the connection between the waste liquid cup and the battery cell 10.

[0080] In other embodiments, the waste liquid cup also includes a connecting assembly 300, which includes a connecting block 310, a spring 320, and a nut 330. The connecting block 310 has a through hole 311 and a connecting hole 312. The through hole 311 is sleeved on the liquid guide tube 180, and the connecting hole 312 is used to connect with the formation equipment. The end of the liquid guide tube 180 away from the cup body 100 has an external thread, and the nut 330 is engaged with the external thread. The spring 320 is sleeved on the liquid guide tube 180, and the two ends of the spring 320 abut against the connecting block 310 and the nut 330 respectively, forming a spring mechanism that can absorb the size difference of the battery cell 10 and the difference in equipment stroke, while buffering the impact on the battery cell 10 when the waste liquid cup descends rapidly.

[0081] In some embodiments, the waste liquid cup of the formation device can be connected to the battery cell 10 to form a negative pressure separation system. The liquid guide hole 120 of the waste liquid cup is connected to the battery cell 10 to form a communicating channel. Since the pressure of the gas generated inside the battery cell 10 is higher than the pressure inside the cup body 100, the gas generated by the battery cell 10 can push the sealing part 220 at the liquid guide hole 120 and move the sealing part 220 away from the liquid guide hole 120, thereby opening the liquid guide hole 120. The gas inside the battery cell 10 will enter the cup body 100 through the liquid guide hole 120. At the same time, a part of the electrolyte will enter the cup body 100 with the gas. The electrolyte condenses and falls back to the bottom of the cup body 100. As the gas is extracted, the pressure inside the cell 10 decreases, and the thrust of the gas gradually decreases. When the thrust of the gas can no longer push up the sealing part 220, the sealing part 220 approaches the liquid guiding hole 120 and abuts against the cup body 100 around the liquid guiding hole 120, thereby sealing the liquid guiding hole 120 and preventing the electrolyte in the cup body 100 from flowing out of the liquid guiding hole 120.

[0082] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0083] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A waste liquid cup, characterized in that, The device includes a cup body (100) and an elastic sealing member (200). The cup body (100) has a cavity (110) and a liquid guiding hole (120) that communicates with the cavity (110). The elastic sealing member (200) is disposed in the cavity (110) and includes an installation part (210) and a sealing part (220) that are connected to each other. The installation part (210) is connected to the cup body (100), and the sealing part (220) extends to the liquid guiding hole (120). The sealing part (220) can be close to or away from the liquid guiding hole (120) to seal or unseal the liquid guiding hole (120).

2. The waste liquid cup according to claim 1, characterized in that, The cavity (110) has an opposing opening (112) and a bottom wall (114), and the liquid guiding hole (120) is provided through the bottom wall (114); the bottom wall (114) has a protrusion (160) at the position of the liquid guiding hole (120), and the protrusion (160) extends from the bottom wall (114) toward the opening (112); along the direction of the bottom wall (114) toward the opening (112), the liquid guiding hole (120) passes through the protrusion (160) to form a through hole on the protrusion (160), and the sealing part (220) is used to cover the protrusion (160) to seal the through hole.

3. The waste liquid cup according to claim 2, characterized in that, The bottom wall (114) is provided with a plurality of mounting positions (140), which are located on a circular trajectory with the center of the liquid guide hole (120) as the center, and the mounting part (210) is connected to at least one of the mounting positions (140).

4. The waste liquid cup according to claim 2, characterized in that, The bottom wall (114) is also provided with a plurality of stiffening plates (150), one end of the stiffening plate (150) is connected to the bottom wall (114), and the other end of the stiffening plate (150) extends toward the cavity (112). The plurality of stiffening plates (150) are arranged crosswise and connected to each other.

5. The waste liquid cup according to claim 4, characterized in that, The end of the protrusion (160) facing away from the bottom wall (114) is higher than the end of the rib (150) facing away from the bottom wall (114).

6. The waste liquid cup according to claim 3, characterized in that, The bottom wall (114) is also provided with a limiting structure (170), and the elastic sealing member (200) further includes a connecting part (230) provided between the mounting part (210) and the sealing part (220). The connecting part (230) is at least partially located on the line connecting the liquid guiding hole (120) and the mounting position (140), and the limiting structure (170) is located on opposite sides of the line connecting the liquid guiding hole (120) and the mounting position (140). And / or, the mounting part (210) includes at least two sub-mounting parts (211), the connecting part (230) includes at least two sub-connecting parts (231), the at least two sub-connecting parts (231) are respectively connected to the sealing part (220), each sub-mounting part (211) is connected to one sub-connecting part (231), each sub-mounting part (211) is correspondingly connected to one mounting position (140), and the fan-shaped angle formed by each sub-mounting part (211) with the center of the liquid guiding hole (120) as the center is less than 180 degrees.

7. The waste liquid cup according to any one of claims 1-6, characterized in that, It also includes a counterweight (240), which is disposed on the sealing part (220) and fixedly connected to the sealing part (220).

8. The waste liquid cup according to claim 7, characterized in that, The sealing part (220) is provided with a receiving cavity, and the counterweight (240) is embedded in the receiving cavity.

9. The waste liquid cup according to any one of claims 1-6, characterized in that, It also includes a liquid guide tube (180), which is connected to the cup body (100). The liquid guide tube (180) is provided with a flow channel, which is connected to the liquid guide hole (120).

10. A chemical formation device, characterized in that, Includes the waste liquid cup as described in any one of claims 1-9.

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