Square lithium battery negative pressure collection device
By adopting a double sealing ring and air guide hole design in the square lithium battery negative pressure collection device, the problem of easy wear of the sealing ring is solved, the sealing reliability and airtightness are improved, manual operation is simplified, and production efficiency is increased.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG HANGKE TECH
- Filing Date
- 2025-05-27
- Publication Date
- 2026-06-12
AI Technical Summary
In the existing production process of square lithium batteries, the sealing ring of the negative pressure collection device is easily worn out, resulting in poor sealing reliability. Moreover, manual operation is cumbersome and it is difficult to guarantee airtightness.
A square lithium battery negative pressure collection device is designed, which adopts a double sealing ring structure and air guide hole design. The plug is sealed with the fixed seat through the flange to avoid friction loss, and multiple vacuum joints are set on the manifold to improve the air pressure consistency.
It improves the durability and reliability of the seal, reduces manual operation time, maintains stable airtightness, and improves work efficiency.
Smart Images
Figure CN224355243U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a negative pressure collection device for square lithium batteries, belonging to the field of battery manufacturing. Background Technology
[0002] In the production process of square lithium batteries, a negative pressure collection cup is used to connect to the battery's filling port and absorb the waste gas inside the battery. Typically, the negative pressure collection cup and the negative pressure manifold are connected, with all stations connected to the same manifold. If a tray of batteries is not fully filled, manual intervention is required at stations without batteries to replace the corresponding suction nozzle with a plug or fill the empty station with a dummy battery to prevent the opening of the negative pressure collection cup from being exposed. Locating the corresponding station and replacing the plug are cumbersome and inconvenient, and it is also difficult to ensure airtightness.
[0003] Korean patent KR102326581B1 provides a design solution to avoid manual intervention. However, the sealing ring used to block the plug between the negative pressure collection cup and the negative pressure manifold is located on the outside of the plug, relying on friction between the outside of the plug and the wall of the manifold connection hole for sealing and opening / closing. Because the sealing is opened and closed very frequently during actual use, the sealing ring is easily worn down and fails after repeated opening and closing; the single sealing ring design results in poor sealing reliability. Summary of the Invention
[0004] To address the aforementioned issues, this utility model proposes a square lithium battery negative pressure collection device. The design concept is to set a vent hole with a clamp at the connection between the negative pressure collection cup and the guide tube, so that the bottom of the negative pressure collection cup is in a closed state when it is not in contact with the battery, thereby improving the sealing reliability.
[0005] A square lithium battery negative pressure collection device includes a metal frame (3), the metal frame (3) has a bottom frame for loading an external battery (2), and a negative pressure collection mechanism (1) is provided on the top frame of the metal frame (3). The central axis of the bottom frame along the long side is defined as the longitudinal direction. The negative pressure collection mechanism (1) includes a manifold (4) arranged along the longitudinal direction. The manifold (4) is parallel to the bottom frame and a vacuum connector (41) is provided on the manifold (4).
[0006] The bottom of the manifold (4) is connected to the longitudinally arranged negative pressure collection cups (5) through the upper fixing seat (55); the central through hole of the upper fixing seat (55) is connected to the inner cavity (42) of the manifold; a spring (6) is provided between the upper fixing seat (55) and the negative pressure collection cups (5);
[0007] The neck of the negative pressure collection cup (5) is slidably inserted into the central through hole of the upper fixed seat (55). The top of the negative pressure collection cup (5) is provided with a plug (52) for switching the connection between the inner cavity (51) of the negative pressure collection cup and the inner cavity (42) of the manifold. The cylindrical body of the plug (52) has a flange on the outside. The flange covers the top of the upper fixed seat (55). The bottom of the flange is provided with a first sealing ring (53). The flange is sealed to the top of the fixed seat (55) through the first sealing ring (53). The cylindrical body of the plug (52) is also provided with a second sealing ring (54). The plug (52) is sealed to the inner wall of the central through hole of the upper fixed seat (55) through the second sealing ring (54).
[0008] A radial air guide hole (521) is provided on the body of the plug (52) below the second sealing ring (54), and the air guide hole (521) connects the wall surface of the plug (52) body and the inner cavity (51) of the negative pressure collection cup.
[0009] Furthermore, the manifold (4) is equipped with multiple vacuum connectors (41). The manifold (4) has three vacuum connectors (41) at the front, middle and rear for connecting to a vacuum source, which reduces the flow rate difference of each negative pressure collection cup and improves the gas pressure consistency.
[0010] Furthermore, the top diameter of the central through hole of the upper fixing seat (55) is enlarged to form an enlarged section, and the part of the cylindrical body of the plug (52) with the second sealing ring (54) is located in the enlarged section; when the negative pressure collection cup (5) is lifted by the battery, the air guide hole (521) is exposed in the enlarged section, so that the inner cavity (51) of the negative pressure collection cup is connected to the inner cavity (42) of the manifold.
[0011] Furthermore, the plug (52) body is provided with multiple radial air guide holes (521) to form a star-shaped air guide channel, ensuring sufficient air flow, reducing the time for the negative pressure cup cavity to form negative pressure conditions, and at the same time meeting the production of large-capacity batteries.
[0012] When the bottom of the negative pressure collection cup 5 is not in contact with the battery 2, the plug 52 blocks the central through hole of the upper fixing seat 55 through the flange and the sealing ring on the side wall. At this time, the negative pressure collection cup 5 is connected to the external environment and isolated from the manifold 4. When the bottom of the negative pressure collection cup 5 contacts the liquid injection port of the battery 2, the plug 52 is pushed upward, the flange is dislodged from the top of the central through hole of the upper fixing seat 55, and the part of the cylindrical body of the plug (52) with the second sealing ring (54) rises above the top of the central through hole of the upper fixing seat 55. The air guide hole (521) of the plug (52) body is connected to the inner cavity of the manifold 42, and the inner cavity (51) of the negative pressure collection cup is connected to the inner cavity (42) of the manifold. The negative pressure collection cup absorbs the exhaust gas in the battery 2.
[0013] The beneficial effects of this utility model are as follows: it keeps the workstation without batteries closed and the workstation with batteries open, eliminating the need for staff to replenish dummy batteries, reducing manual operation time, maintaining stable airtightness, and improving work efficiency; secondly, the double sealing ring design improves sealing reliability, especially since the flange cap of the plug 52 presses against the top of the central through hole of the upper fixed seat 55, and the two do not rub against each other during the sealing opening and closing process, and the first sealing ring has no frictional wear, thus improving sealing durability and reliability. Attached Figure Description
[0014] Figure 1 This is a structural diagram of a square lithium battery negative pressure collection device according to this utility model.
[0015] Figure 2 This is a structural diagram of the negative pressure collection cup of this utility model.
[0016] Figure 3 This is a longitudinal cross-sectional view of the negative pressure collection cup of this utility model.
[0017] Figure 4 This is a diagram of the internal structure of the negative pressure collection cup of this utility model.
[0018] Figure 5a and Figure 5b This is a structural diagram of the fitting between the plug and the manifold of the negative pressure collection cup of this utility model. Figure 5a This is the state when the bottom of the negative pressure collection cup 5 is not in contact with the battery 2. Figure 5b It is the state in which the bottom of the negative pressure collection cup 5 is lifted after it comes into contact with the battery 2.
[0019] Figure 6a This is a longitudinal sectional view of the plug; Figure 6b This is a cross-sectional view of the plug.
[0020] Figure 7 This is a longitudinal sectional view of the upper fixed base of this utility model. Detailed Implementation
[0021] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.
[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "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 are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.
[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0024] 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.
[0025] 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.
[0026] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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 the present invention. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0027] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments.
[0028] A square lithium battery negative pressure collection device includes a metal frame (3), the metal frame (3) has a bottom frame for loading an external battery (2), and a negative pressure collection mechanism (1) is provided on the top frame of the metal frame (3). The central axis of the bottom frame along the long side is defined as the longitudinal direction. The negative pressure collection mechanism (1) includes a manifold (4) arranged along the longitudinal direction. The manifold (4) is parallel to the bottom frame and a vacuum connector (41) is provided on the manifold (4).
[0029] The bottom of the manifold (4) is connected to the longitudinally arranged negative pressure collection cups (5) through the upper fixing seat (55); the central through hole of the upper fixing seat (55) is connected to the inner cavity (42) of the manifold; a spring (6) is provided between the upper fixing seat (55) and the negative pressure collection cups (5);
[0030] The neck of the negative pressure collection cup (5) is slidably inserted into the central through hole of the upper fixed seat (55). The top of the negative pressure collection cup (5) is provided with a plug (52) for switching the connection between the inner cavity (51) of the negative pressure collection cup and the inner cavity (42) of the manifold. The cylindrical body of the plug (52) has a flange on the outside. The flange covers the top of the upper fixed seat (55). The bottom of the flange is provided with a first sealing ring (53). The flange is sealed to the top of the fixed seat (55) through the first sealing ring (53). The cylindrical body of the plug (52) is also provided with a second sealing ring (54). The plug (52) is sealed to the inner wall of the central through hole of the upper fixed seat (55) through the second sealing ring (54).
[0031] A radial air guide hole (521) is provided on the body of the plug (52) below the second sealing ring (54), and the air guide hole (521) connects the wall surface of the plug (52) body and the inner cavity (51) of the negative pressure collection cup.
[0032] The manifold (4) is equipped with three vacuum connectors (41). The manifold (4) is equipped with three vacuum connectors (41) at the front, middle and rear for connecting to a vacuum source, which reduces the flow rate difference of each negative pressure collection cup and improves the gas pressure consistency.
[0033] The top diameter of the central through hole of the upper fixed seat (55) is enlarged to form an enlarged section. The cylindrical body of the plug (52) with the second sealing ring (54) is located in the enlarged section. When the negative pressure collection cup (5) is lifted by the battery, the air guide hole (521) is exposed in the enlarged section, so that the inner cavity (51) of the negative pressure collection cup is connected to the inner cavity (42) of the manifold.
[0034] The plug (52) body is provided with multiple radial air guide holes (521) to form a star-shaped air guide channel, ensuring sufficient air flow, reducing the time for the negative pressure cup cavity to form negative pressure conditions, and at the same time meeting the production of large-capacity batteries.
[0035] When the bottom of the negative pressure collection cup 5 is not in contact with the battery 2, the plug 52 blocks the central through hole of the upper fixing seat 55 through the flange and the sealing ring on the side wall. At this time, the negative pressure collection cup 5 is connected to the external environment and isolated from the manifold 4. When the bottom of the negative pressure collection cup 5 contacts the liquid injection port of the battery 2, the plug 52 is pushed upward, the flange is dislodged from the top of the central through hole of the upper fixing seat 55, and the part of the cylindrical body of the plug (52) with the second sealing ring (54) rises above the top of the central through hole of the upper fixing seat 55. The air guide hole (521) of the plug (52) body is connected to the inner cavity of the manifold 42, and the inner cavity (51) of the negative pressure collection cup is connected to the inner cavity (42) of the manifold. The negative pressure collection cup absorbs the exhaust gas in the battery 2.
[0036] This invention keeps the workstation without batteries closed while maintaining continuity at workstations with batteries, eliminating the need for workers to replenish dummy batteries, reducing manual operation time, maintaining stable airtightness, and improving work efficiency. The double-sealing ring design improves sealing reliability, especially since the flange cap of the plug 52 presses against the top of the central through hole of the upper fixing seat 55, and the two do not rub against each other during the sealing opening and closing process. The first sealing ring has no frictional wear, improving sealing durability and reliability.
[0037] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A square lithium battery negative pressure collection device, comprising a metal frame (3), the metal frame (3) having a bottom frame for mounting an external battery (2), and a negative pressure collection mechanism (1) provided on the top frame of the metal frame (3), wherein the central axis of the bottom frame along its long side is defined as the longitudinal direction, characterized in that: The negative pressure collection mechanism (1) includes a manifold (4) arranged longitudinally, the manifold (4) being parallel to the bottom frame, and a vacuum connector (41) being provided on the manifold (4); The bottom of the manifold (4) is connected to the longitudinally arranged negative pressure collection cups (5) through the upper fixing seat (55); the central through hole of the upper fixing seat (55) is connected to the inner cavity (42) of the manifold; a spring (6) is provided between the upper fixing seat (55) and the negative pressure collection cups (5); The neck of the negative pressure collection cup (5) is slidably inserted into the central through hole of the upper fixed seat (55). The top of the negative pressure collection cup (5) is provided with a plug (52) for switching the connection between the inner cavity (51) of the negative pressure collection cup and the inner cavity (42) of the manifold. The cylindrical body of the plug (52) has a flange on the outside. The flange covers the top of the upper fixed seat (55). The bottom of the flange is provided with a first sealing ring (53). The flange is sealed to the top of the fixed seat (55) through the first sealing ring (53). The cylindrical body of the plug (52) is also provided with a second sealing ring (54). The plug (52) is sealed to the inner wall of the central through hole of the upper fixed seat (55) through the second sealing ring (54). A radial air guide hole (521) is provided on the body of the plug (52) below the second sealing ring (54), and the air guide hole (521) connects the wall surface of the plug (52) body and the inner cavity (51) of the negative pressure collection cup.
2. The square lithium battery negative pressure collection device according to claim 1, characterized in that: The manifold (4) is equipped with multiple vacuum connectors (41).
3. The square lithium battery negative pressure collection device according to claim 1, characterized in that: The top diameter of the central through hole of the upper fixed seat (55) is enlarged to form an enlarged section. The cylindrical body of the plug (52) with the second sealing ring (54) is located in the enlarged section. When the negative pressure collection cup (5) is lifted by the battery, the air guide hole (521) is exposed in the enlarged section, so that the inner cavity (51) of the negative pressure collection cup is connected to the inner cavity (42) of the manifold.
4. The square lithium battery negative pressure collection device according to claim 1, characterized in that: The plug (52) body is provided with multiple radial air guide holes (521).