Self-sealing type negative pressure collecting cup
By designing a self-sealed negative pressure collection cup, the combination of bus tube and negative pressure cup components is used to solve the problems of electrolyte loss and liquid leakage during the negative pressure formation of lithium batteries, and the effect of self-sealing function, reducing pipelines, saving costs and reducing electrolyte waste is achieved.
Patent Information
- Application Number
- CN202421207847.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-05-30
AI Technical Summary
During the negative pressure formation process of lithium batteries, existing equipment is complex and has high airtightness requirements, which can easily lead to electrolyte loss and liquid leakage contamination of the battery.
A self-sealed negative pressure collection cup is designed, which includes a horizontal bus tube and a plurality of negative pressure cup components. Through the cooperation of the negative pressure suction rod and the spring spring, gas extraction and electrolyte reflux collection are achieved.
The device has a self-sealing function to prevent electrolyte droplets from contaminating the battery, and reduce pipelines through convergence integration, saving costs and reducing electrolyte waste. At the same time, when the negative pressure cup or suction rod is damaged, you only need to replace the individual parts, saving the overall replacement cost.
Smart Images
Figure CN222896715U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a self-sealing negative pressure collecting cup and belongs to the field of battery negative pressure formation testing. Background Art
[0002] In the lithium battery production process, lithium battery formation is the first charging process of the battery after the lithium battery is filled with liquid. Its main function is to activate the active substances in the battery and activate the lithium battery. According to the different conditions such as temperature, current, and liquid injection port during the lithium battery formation, the formation process can be divided into many types, including negative pressure formation. During the negative pressure formation process, the battery cell is vacuumed to -80KPa from the liquid injection port to remove the generated gas in time, ensuring the stability and consistency of the SEI film. However, the formation equipment is complex and has high requirements for airtightness. In addition, problems such as electrolyte loss and leakage contamination of the battery will occur during the vacuuming process. Summary of the invention
[0003] In view of the above problems, the utility model provides a self-sealing negative pressure collection cup.
[0004] The self-sealing negative pressure collection cup includes a horizontal manifold, which is a rectangular long tube with a cavity inside. The cavity structure can be a hollow square or a hollow cylinder. The extension direction of the manifold is defined as the left and right direction, and the inner cavity of the manifold is connected to an external negative pressure mechanism. The lower end of the manifold is connected to a plurality of negative pressure cup assemblies flush on the left and right through an exhaust branch channel. The negative pressure cup assembly is used for reflux storage of electrolyte formed by negative pressure. The negative pressure cup assembly includes a cup cover, the center of the upper surface of the cup cover is connected to an exhaust branch channel with a smaller radius, the lower end of the cup cover is connected to the cup body through a groove that can be embedded in the cup body, and the lower end of the cup body is connected to a mounting seat. A negative pressure suction rod connected upward to the inside of the cup body is passed through the mounting seat, and an annular protrusion is provided on the outer middle part of the negative pressure suction rod, and a spring retaining spring is provided between the annular protrusion and the mounting seat.
[0005] More specifically, a first sealing ring is provided at the connection between the cup cover and the cup body, a second sealing ring is provided at the connection between the negative pressure suction rod and the cup body, and a third sealing ring is provided at the connection between the negative pressure suction rod and the mounting seat.
[0006] More specifically, the cup body is a funnel-like structure, and the material used is one of stainless steel, aluminum profile, polyethylene, polytetrafluoroethylene or polyvinylidene fluoride.
[0007] During operation, the lower end of the negative pressure suction rod is connected to the external battery filling port, the mounting seat remains stationary, and the spring retainer is compressed upward due to the extrusion of the negative pressure suction rod; the manifold extracts the gas generated inside the battery, and the electrolyte mixed with the gas flows back due to the small exhaust branch channel and is collected in the cup body. After extracting the gas, the negative pressure suction rod is separated from the external battery filling port and returns to its original position under the elastic action of the spring retainer.
[0008] The beneficial effects of the utility model are embodied in the following aspects: first, it has a self-sealing function, which can prevent dripping and thus contaminating the battery; the negative pressure formation process can also be carried out when the battery tray is not full. Second, it can be integrated to reduce pipelines and save costs. Secondly, the negative pressure formation device can meet the electrolyte reflux and reduce electrolyte waste. Finally, in actual use, if the negative pressure cup or suction rod is damaged or blocked, only one component needs to be replaced, and there is no need to replace the entire part, which saves costs and facilitates maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a structural diagram of a self-sealing negative pressure cup.
[0010] Figure 2 It is a left view of the utility model.
[0011] Figure 3 It is a top view of the utility model.
[0012] Figure 4 It is the front view of the utility model.
[0013] Figure 5 It is a structural diagram of the negative pressure cup assembly.
[0014] Figure 6 It is the front view of the negative pressure cup assembly.
[0015] Figure 7 It is an exploded view of the utility model. DETAILED DESCRIPTION
[0016] The specific implementation of the embodiment of the utility model is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the utility model, and is not used to limit the embodiment of the utility model.
[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0018] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0019] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0020] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0021] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0022] The present invention will be described in detail below with reference to the accompanying drawings and in combination with exemplary embodiments.
[0023] The self-sealing negative pressure collection cup includes a horizontal manifold 1, and the extension direction of the manifold 1 is defined as the left-right direction. The lower end of the manifold 1 is connected to a plurality of negative pressure cup assemblies 3 flush on the left and right through an exhaust branch channel 2; the negative pressure cup assembly 3 includes a cup cover 31, the center of the upper surface of the cup cover 31 is connected to the exhaust branch channel 2, the lower end of the cup cover 31 is connected to the cup body 33 through a groove that can be embedded in the cup body, and the lower end of the cup body 33 is connected to a mounting seat 34; a negative pressure suction rod 35 connected upward to the inside of the cup body is passed through the mounting seat 34, and an annular protrusion is provided on the middle extension of the negative pressure suction rod 35, and a spring retaining spring 36 is provided between the annular protrusion and the mounting seat 34.
[0024] More specifically, a first sealing ring 32 is provided at the connection between the cup cover 31 and the cup body 33 , a second sealing ring 38 is provided at the connection between the negative pressure suction rod 35 and the cup body 33 , and a third sealing ring 37 is provided at the connection between the negative pressure suction rod and the mounting seat.
[0025] More specifically, the cup body is a funnel-like structure, and the material used is one of stainless steel, aluminum profile, polyethylene, polytetrafluoroethylene or polyvinylidene fluoride.
[0026] During operation, the lower end of the negative pressure suction rod is connected to the external battery filling port, the mounting seat remains stationary, and the spring retainer is compressed upward due to the extrusion of the negative pressure suction rod; the manifold extracts the gas generated inside the battery, and the electrolyte mixed with the gas flows back due to the small exhaust branch channel and is collected in the cup body. After extracting the gas, the negative pressure suction rod is separated from the external battery filling port and returns to its original position under the elastic action of the spring retainer.
[0027] The beneficial effects of the utility model are embodied in the following aspects: first, it has a self-sealing function, which can prevent dripping and thus contaminating the battery; the negative pressure formation process can also be carried out when the battery tray is not full. Second, it can be integrated to reduce pipelines and save costs. Secondly, the negative pressure formation device can meet the electrolyte reflux and reduce electrolyte waste. Finally, in actual use, if the negative pressure cup or suction rod is damaged or blocked, only one component needs to be replaced, and there is no need to replace the entire part, which saves costs and facilitates maintenance.
Claims
1. A self-sealing negative pressure collection cup, characterized in that: It comprises a horizontal manifold, the extension direction of the manifold is defined as left and right, the lower end of the manifold is connected to a plurality of negative pressure cup assemblies flush with the left and right through an exhaust branch channel; the negative pressure cup assembly comprises a cup cover, the center of the upper surface of the cup cover is connected to the exhaust branch channel, the lower end of the cup cover is connected to the cup body through a groove that can be embedded in the cup body, and the lower end of the cup body is connected to a mounting seat; a negative pressure suction rod connected upward to the inside of the cup body is passed through the mounting seat, an annular protrusion is provided on the outer extension of the middle part of the negative pressure suction rod, and a spring retaining spring is provided between the annular protrusion and the mounting seat.
2. A self-sealing negative pressure collection cup according to claim 1, characterized in that: A first sealing ring is provided at the connection between the cup cover and the cup body, a second sealing ring is provided at the connection between the negative pressure suction rod and the cup body, and a third sealing ring is provided at the connection between the negative pressure suction rod and the mounting seat.
3. A self-sealing negative pressure collection cup according to claim 2, characterized in that: The cup body is made of one of stainless steel, aluminum profile, polyethylene, polytetrafluoroethylene or polyvinylidene fluoride.