A three-prong contact guide cap mechanism for open-jar large cylindrical battery negative pressure formation process
Patent Information
- Application Number
- CN202611387798.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-09-08
- Publication Date
- 2026-10-30
AI Technical Summary
[0014]1.通过三叉接触导向盖帽可以使电池能够通过导向外圈顺利的使敞口电池与三叉接触导向盖帽内芯压合；
Smart Images
Figure CN123018165A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of lithium battery production technology, specifically relating to a three-pronged contact guide cap mechanism for negative pressure formation process of open cylindrical batteries. Background Technology
[0002] In the manufacturing of lithium batteries, the negative pressure formation process is crucial. This process involves sealing open, large cylindrical batteries during negative pressure formation, a vital step that significantly impacts battery performance. The negative pressure environment required during formation directly affects electrolyte penetration and diffusion, thus determining battery quality. The open-type negative pressure formation process is particularly challenging for cylindrical batteries with a diameter of φ46mm, a wall thickness of 0.4mm, and the need for sealing.
[0003] Therefore, a mechanism is needed for sealing the three-pronged contact guide cap of open cylindrical batteries to ensure the negative pressure environment required during cell formation, thereby improving battery performance and product quality. Summary of the Invention
[0004] To address the aforementioned technical problems in existing technologies, this invention provides a three-pronged contact guide cap mechanism for the negative pressure formation process of open-top cylindrical batteries. The detachable structure of the three-pronged contact guide cap allows for smooth pressing and sealing of the open-top cylindrical battery. Furthermore, its guide outer ring accommodates battery movement errors within the tray, simplifying the structural design. This invention eliminates the risk of batteries adhering to the cap, thereby improving the negative pressure sealing performance of the equipment, enabling the battery to achieve optimal negative pressure, improving the internal chemical reaction of the electrolyte, and ultimately enhancing battery performance.
[0005] The technical solution adopted in this invention is:
[0006] A three-pronged contact guide cap mechanism for negative pressure formation process of open-type large cylindrical battery is characterized by comprising a three-pronged contact guide cap (1), a three-pronged contact guide cap mounting base (2), and a three-pronged contact guide cap inner core (4). The three-pronged contact guide cap (1) and the three-pronged contact guide cap mounting base (2), as well as the three-pronged contact guide cap mounting base (2) and the three-pronged contact guide cap inner core (4), are detachably connected. The three-pronged contact guide cap mounting base (2) is mounted on the negative pressure formation mechanism of open-type large cylindrical battery and is arranged parallel to the negative pressure cup base. The three-pronged contact guide cap (1) is arranged at intervals along the length direction of the three-pronged contact guide cap mounting base (2) and corresponds one-to-one with the negative pressure cups on the negative pressure cup base. The three-pronged contact guide cap mounting base (2) is mounted on the negative pressure formation mechanism of open-type large cylindrical battery and is located below the negative pressure cups.
[0007] The three-pronged contact guide cap (1) has three guide blocks spaced along the circumferential direction on one side edge facing the open cylindrical battery (3). The three guide blocks together form a guide outer ring for pressing and sealing the open cylindrical battery.
[0008] The three-pronged contact guide cap (1) has a cylindrical through hole, and the inner core (4) of the three-pronged contact guide cap has a mounting part for being embedded in the cylindrical through hole; the inner core (4) of the three-pronged contact guide cap has a horn-shaped structure at one end facing the open cylindrical battery, and the horn-shaped structure is adapted to the open end of the open cylindrical battery.
[0009] The inner core (4) of the three-pronged contact guide cap is provided with a guide through hole, which is connected to the cylindrical through hole. The negative pressure formation mechanism is pressed together through the guide through hole and the cylindrical through hole. The open end of the open large cylindrical battery (3) is directly opposite the guide through hole on the inner core (4) of the three-pronged contact guide cap, and the other end is installed on the tray.
[0010] Furthermore, a first sealing structure is provided on the outer wall of the mounting part.
[0011] Furthermore, a second sealing structure is provided on the inner wall of the trumpet-shaped structure.
[0012] Furthermore, the three-pronged contact guide cap mounting base (2) has a fixing rod, and the three-pronged contact guide cap (1) is mounted on the fixing rod and fixed by friction, making it easy to disassemble and replace.
[0013] The innovative aspects of this invention:
[0014] 1. The three-pronged contact guide cap allows the battery to pass smoothly through the guide outer ring, pressing the open battery against the inner core of the three-pronged contact guide cap;
[0015] 2. The sealing material of the inner core of the three-pronged contact guide cap achieves sealing and pressure retention, enabling a good vacuum environment inside the battery cell;
[0016] 3. The low-area contact of the three-pronged contact guide cap greatly reduces the possibility of the battery adhering to the cap, thus reducing the risk of the cap carrying a battery.
[0017] The working principle of this invention is as follows: The guide ring allows the open, large cylindrical battery to be smoothly pressed and sealed, acting as a guide and accommodating the battery's movement errors in the tray. The vacuum structure of the negative pressure formation mechanism, combined with cylinder pressing, achieves a complete sealing and pressure-maintaining effect, meeting the negative pressure environment required by the battery. The three-pronged contact design of the guide ring effectively reduces the contact area between the battery casing opening and the guide ring, preventing the formation of foreign objects.
[0018] Compared with the prior art, the beneficial effects of the present invention are reflected in:
[0019] 1. The three-pronged contact guide cap allows the open battery to be smoothly pressed against the inner core of the three-pronged contact guide cap; the sealing material of the inner core of the three-pronged contact guide cap achieves sealing and pressure maintenance, creating a good vacuum environment inside the battery cell; the low contact area of the three-pronged contact guide cap greatly reduces the possibility of the battery adhering to the cap, reducing the risk of the cap carrying the battery; the non-guided three-pronged contact guide cap structure greatly reduces the powder or strip-shaped foreign matter generated by friction between the open cylindrical battery casing opening and the guide edge.
[0020] 2. This invention has a simple structure and can be quickly disassembled and assembled onto the negative pressure formation needle plate mechanism of an open cylindrical battery. This allows the open cylindrical battery to be completely sealed and vacuumed for negative pressure formation. This mechanism can reliably and stably seal and maintain pressure on the open cylindrical battery, enabling it to reach the negative pressure environment required by its process. This allows the electrolyte gas-liquid mixture generated by the charging and discharging reaction inside the battery to be discharged, thereby improving battery performance and product quality. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the overall structure of a three-pronged contact guide cap mechanism for negative pressure formation process of cylindrical open-top large cylindrical batteries according to the present invention.
[0022] Figure 2 This is a schematic diagram of a three-pronged contact guide cap structure for negative pressure formation process of cylindrical open-top large cylindrical batteries according to the present invention.
[0023] Figure 3a and Figure 3bThese are schematic diagrams of the inner core of a three-pronged contact guide cap structure for negative pressure formation process of cylindrical open-top large cylindrical batteries according to the present invention.
[0024] Figure 4 This is a schematic diagram of an open-ended cylindrical battery structure for a negative pressure formation process of an open-ended cylindrical battery according to the present invention.
[0025] Figure 5a and Figure 5b These are schematic diagrams illustrating different structural features of a three-pronged contact guide cap for negative pressure formation process of a cylindrical open-top large cylindrical battery according to the present invention. Detailed Implementation
[0026] 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.
[0027] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.
[0028] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments.
[0029] refer to Figure 1 As shown in Figure 5, a three-pronged contact guide cap mechanism for negative pressure formation process of open-type large cylindrical batteries according to the present invention includes a three-pronged contact guide cap 1, a three-pronged contact guide cap mounting base 2, and a three-pronged contact guide cap inner core 4. The three-pronged contact guide cap 1 and the three-pronged contact guide cap mounting base 2, as well as the three-pronged contact guide cap mounting base 2 and the three-pronged contact guide cap inner core 4, are detachably connected. The three-pronged contact guide cap mounting base 2 is mounted on the negative pressure formation mechanism of the open-type large cylindrical battery and is arranged parallel to the negative pressure cup base. The three-pronged contact guide caps 1 are arranged at intervals along the length direction of the three-pronged contact guide cap mounting base 2 and correspond one-to-one with the negative pressure cups on the negative pressure cup base. The three-pronged contact guide cap mounting base 2 is mounted on the negative pressure formation mechanism of the open-type large cylindrical battery and is located below the negative pressure cups.
[0030] The three-pronged contact guide cap 1 has three guide blocks spaced apart along the circumferential direction on one side edge facing the open large cylindrical battery 3. The three guide blocks together form a guide outer ring for pressing and sealing the open large cylindrical battery.
[0031] Specifically, the guide ring design allows for smooth pressing and sealing of the open cylindrical battery, acting as a guide and accommodating battery movement errors within the tray. The vacuum structure of the negative pressure formation mechanism, combined with cylinder pressing, achieves a complete seal and pressure retention effect, meeting the required negative pressure environment for the battery. The three-pronged contact design of the guide ring effectively reduces the contact area between the battery casing opening and the guide ring, preventing the accumulation of foreign objects.
[0032] The three-pronged contact guide cap 1 has a cylindrical through hole, and the inner core 4 of the three-pronged contact guide cap has a mounting part for being embedded in the cylindrical through hole; the inner core 4 of the three-pronged contact guide cap has a horn-shaped structure at the end facing the open large cylindrical battery, and the horn-shaped structure is adapted to the open end of the open large cylindrical battery.
[0033] The inner core 4 of the three-pronged contact guide cap has a guide through hole, which is connected to the cylindrical through hole. The negative pressure formation mechanism is pressed together through the guide through hole and the cylindrical through hole. The open end of the open large cylindrical battery 3 is directly opposite the guide through hole on the inner core 4 of the three-pronged contact guide cap, and the other end is mounted on the tray.
[0034] In one embodiment, a first sealing structure is provided on the outer wall of the mounting portion.
[0035] In one embodiment, a second sealing structure is provided on the inner wall of the trumpet-shaped structure.
[0036] Specifically, the first sealing structure is a grooved arc structure provided on the mounting part, and the second sealing structure is a grooved plane structure provided on the inner wall of the trumpet-shaped structure.
[0037] In one embodiment, the three-pronged contact guide cap mounting base 2 has a fixing rod, and the three-pronged contact guide cap 1 is mounted on the fixing rod and fixed by friction, which facilitates disassembly and replacement.
[0038] The three-pronged contact guide cap and the three-pronged contact guide cap mounting base of the present invention can be directly assembled on the negative pressure formation mechanism of a large cylindrical battery (but the number of channels in the storage tray is not limited to 64CH / 144CH / 196CH / 256CH). The vacuum structure of the negative pressure formation mechanism, in conjunction with the cylinder pressing, achieves a complete sealing and pressure-holding effect, achieving the negative pressure environment required by the battery, thereby enabling the battery electrolyte to react completely, improving battery performance and product quality.
[0039] In the description of this invention, 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," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.
[0040] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0041] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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 invention according to the specific circumstances.
[0042] In this invention, 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," "over," and "on top" of 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] 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.
[0044] 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 three-pronged contact guide cap mechanism for negative pressure formation process of open-top large cylindrical batteries, characterized in that, The device includes a three-pronged contact guide cap (1), a three-pronged contact guide cap mounting base (2), and a three-pronged contact guide cap inner core (4). The three-pronged contact guide cap (1) and the three-pronged contact guide cap mounting base (2), as well as the three-pronged contact guide cap mounting base (2) and the three-pronged contact guide cap inner core (4), are detachably connected. The three-pronged contact guide cap mounting base (2) is mounted on the open-mouth large cylindrical battery negative pressure formation mechanism and is arranged parallel to the negative pressure cup base. The three-pronged contact guide cap (1) is arranged at intervals along the length direction of the three-pronged contact guide cap mounting base (2) and corresponds one-to-one with the negative pressure cups on the negative pressure cup base. The three-pronged contact guide cap mounting base (2) is mounted on the open-mouth large cylindrical battery negative pressure formation mechanism and is located below the negative pressure cups. The three-pronged contact guide cap (1) has three guide blocks spaced along the circumferential direction on one side edge facing the open cylindrical battery (3). The three guide blocks together form a guide outer ring for pressing and sealing the open cylindrical battery. The three-pronged contact guide cap (1) has a cylindrical through hole, and the inner core (4) of the three-pronged contact guide cap has a mounting part for being embedded in the cylindrical through hole; the inner core (4) of the three-pronged contact guide cap has a horn-shaped structure at one end facing the open cylindrical battery, and the horn-shaped structure is adapted to the open end of the open cylindrical battery. The inner core (4) of the three-pronged contact guide cap is provided with a guide through hole, which is connected to the cylindrical through hole. The negative pressure formation mechanism is pressed together through the guide through hole and the cylindrical through hole. The open end of the open large cylindrical battery (3) is directly opposite the guide through hole on the inner core (4) of the three-pronged contact guide cap, and the other end is installed on the tray.
2. The three-pronged contact guide cap mechanism for negative pressure formation process of open-top large cylindrical batteries according to claim 1, characterized in that, A first sealing structure is provided on the outer wall of the mounting part.
3. The three-pronged contact guide cap mechanism for negative pressure formation process of open-top large cylindrical batteries according to claim 1, characterized in that, A second sealing structure is provided on the inner wall of the trumpet-shaped structure.
4. A three-pronged contact guide cap mechanism for negative pressure formation process of open-top large cylindrical batteries according to claim 1, characterized in that, The three-pronged contact guide cap mounting base (2) has a fixing rod, and the three-pronged contact guide cap (1) is mounted on the fixing rod and fixed by friction, making it easy to disassemble and replace.