Self-sealing formation negative pressure suction nozzle

Abstract

The utility model discloses a self-sealing formation negative pressure suction nozzle which comprises a suction nozzle body, a negative pressure channel and a valve containing cavity are arranged in the suction nozzle body, one end of the negative pressure channel is used for being connected with a negative pressure device, the other end of the negative pressure channel is connected with one end of the valve containing cavity, and a self-sealing valve is arranged at the other end of the valve containing cavity. A plurality of radial incisions are formed in the self-sealing valve, the radial incisions intersect at the center point of the self-sealing valve, a supporting rib is further arranged on the side, away from the valve containing cavity, of the self-sealing valve, when the supporting rib is stressed, the radial incisions are opened, and when the supporting rib is unloaded, the radial incisions are closed. The negative-pressure suction nozzle has the beneficial effects that the self-sealing valve and the supporting rib are arranged on the negative-pressure suction nozzle to realize opening or closing of the self-sealing valve, so that when the negative-pressure suction nozzle is in press fit with the battery, the negative-pressure channel is always kept to be communicated with the interior of the battery, and when the negative-pressure suction nozzle is separated from the battery, the self-sealing valve is automatically closed to realize sealing of the negative-pressure suction nozzle; electrolyte is prevented from dripping on the surface of the battery, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery formation, in particular to a self-sealing formation negative pressure suction nozzle. Background Art

[0002] The production process of lithium batteries is very complex and includes multiple steps. Formation is an important link that cannot be ignored. It has a crucial impact on the performance of lithium batteries. Lithium battery formation is the first charging process of the battery after the lithium battery is filled with liquid. This process can activate the active substances in the battery and activate the lithium battery. During the formation process, the chemical reaction inside the lithium battery will produce gas. Usually, it is necessary to use a negative pressure nozzle to extract the gas through a negative pressure device. In the process of negative pressure vacuuming the battery, some electrolyte will inevitably be extracted. This requires subsequent vacuum breaking to re-inject the electrolyte into the lithium battery. Breaking the vacuum usually involves turning off the negative pressure device and filling air through the nozzle so that the negative pressure inside the lithium battery will suck back the electrolyte, causing the electrolyte to flow back into the lithium battery.

[0003] At present, the negative pressure nozzles for formation in the industry generally adopt flat-head or petal-shaped ones. This structure has good sealing performance. However, when the formation process is completed and the nozzle is disconnected from the battery, the residual electrolyte in the nozzle and the pipeline will flow down the center hole of the nozzle and drip onto the surface of the battery, causing electrolyte contamination on the surface of the battery, which has a great impact on the appearance quality of the battery. The use of manual wiping or machine wiping increases the cost. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a self-sealing negative pressure suction nozzle. The self-sealing valve and supporting ribs are arranged on the negative pressure suction nozzle to realize the opening or closing of the self-sealing valve, so that when the negative pressure suction nozzle is pressed against the battery, the negative pressure channel is always maintained in communication with the inside of the battery. When the negative pressure suction nozzle is separated from the battery, the self-sealing valve is automatically closed to realize the sealing of the negative pressure suction nozzle, thereby preventing the electrolyte from flowing down and dripping onto the surface of the battery, and reducing costs.

[0005] The purpose of the utility model is achieved through the following technical measures: a self-sealing chemical negative pressure suction nozzle, comprising a suction nozzle body, a negative pressure channel and a valve receiving cavity being provided in the suction nozzle body, one end of the negative pressure channel being used to connect a negative pressure device, the other end of the negative pressure channel being connected to one end of the valve receiving cavity, the other end of the valve receiving cavity being provided with a self-sealing valve, a plurality of radial incisions being provided on the self-sealing valve, the plurality of radial incisions converging at the center point of the self-sealing valve, a side of the self-sealing valve away from the valve receiving cavity being further provided with a supporting rib, when the supporting rib is subjected to force, the radial incision opens, and when the supporting rib is unloaded, the radial incision closes.

[0006] In some embodiments, the radial incision cuts the self-sealing valve into a plurality of fan-shaped membrane flaps, and each of the fan-shaped membrane flaps is correspondingly provided with a supporting rib.

[0007] In some embodiments, there are three or more radial cuts.

[0008] In some embodiments, the support rib is a wedge-shaped structure, and the bottom surface of the support rib is inclined downward from the edge to the center of the self-sealing valve.

[0009] In some embodiments, the axial cross-section of the valve receiving cavity is trapezoidal.

[0010] In some embodiments, the negative pressure channel includes a nozzle fixing channel and a negative pressure channel, one end of the nozzle fixing channel is used to connect the negative pressure device, the other end of the nozzle fixing channel is connected to one end of the negative pressure channel, and the other end of the negative pressure channel is connected to the valve receiving cavity.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention sets a self-sealing valve and a supporting rib on the negative pressure suction nozzle, so that the self-sealing valve opens a radial incision when the supporting rib is stressed, and closes the radial incision when the supporting rib is unloaded, so that the negative pressure suction nozzle always keeps the negative pressure channel connected to the inside of the battery when evacuating or breaking the vacuum. As long as the negative pressure suction nozzle is separated from the battery, the self-sealing valve will seal the negative pressure suction nozzle to prevent the electrolyte from flowing down and dripping onto the surface of the battery. In addition, the self-sealing valve of the present application is opened or closed by the supporting rib, and does not need to be opened by the pressure difference on both sides of the self-sealing valve. When breaking the vacuum, even if the internal pressure of the battery reaches the air pressure, the pressure on both sides of the self-sealing valve is balanced, which can ensure that the self-sealing valve remains open, ensuring that the negative pressure channel is connected to the inside of the battery, and allowing the electrolyte to flow into the battery.

[0012] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the present utility model.

[0014] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0015] Among them, 1. nozzle body, 2. self-sealing valve, 3. supporting ribs, 4. radial incision, 5. valve receiving cavity, 6. nozzle fixing channel, 7. negative pressure channel. DETAILED DESCRIPTION

[0016] like Figures 1 to 2As shown, a self-sealing chemical negative pressure suction nozzle includes a suction nozzle body 1, wherein a negative pressure channel and a valve receiving chamber 5 are provided in the suction nozzle body 1, one end of the negative pressure channel is used to connect a negative pressure device, and the other end of the negative pressure channel is connected to one end of the valve receiving chamber 5, and the other end of the valve receiving chamber 5 is provided with a self-sealing valve 2. Specifically, the self-sealing valve 2 is a flexible valve so that the self-sealing valve 2 has elasticity, and a plurality of radial incisions 4 are provided on the self-sealing valve 2, and the plurality of radial incisions 4 intersect at the center point of the self-sealing valve 2. The self-sealing valve 2 is further provided with a supporting rib 3 on the side away from the valve receiving chamber 5. When the supporting rib 3 is subjected to force, the radial incision 4 opens, and when the supporting rib 3 is unloaded, the radial incision 4 closes. Specifically, when the negative pressure nozzle is pressed against the battery, the battery filling port squeezes the support ribs 3, which are stressed and push the self-sealing valve 2 upward into the valve receiving cavity 5. The radial incision 4 expands, and the negative pressure channel is connected to the filling port, allowing the battery to be evacuated and the vacuum to be broken. After the formation process is completed, the negative pressure nozzle needs to be disconnected from the battery by simply pulling the negative pressure nozzle out of the filling port. The support ribs 3 unload the force, the self-sealing valve 2 returns to its original position, the radial incision 4 closes, and the self-sealing valve 2 seals the negative pressure channel of the negative pressure nozzle to prevent electrolyte from dripping onto the battery surface.

[0017] The radial incision 4 cuts the self-sealing valve 2 into a plurality of fan-shaped membrane petals, and each of the fan-shaped membrane petals is correspondingly provided with a supporting rib 3 so that when the negative pressure suction nozzle is pressed against the battery, each fan-shaped membrane petal can be subjected to force, so that the opening generated by the self-sealing valve 2 is coaxial with the negative pressure channel, which is convenient for vacuuming or breaking the vacuum.

[0018] The number of radial cuts 4 is more than 3, preferably, the plurality of radial cuts 4 are evenly distributed around the axis of the negative pressure nozzle. Specifically, it can be set according to actual needs, such as Figure 1 As shown, there are four radial cuts 4, and the four radial cuts 4 form a cross-shaped cut.

[0019] The support ribs 3 are wedge-shaped, with their bottom surfaces sloping downward from the edge to the center of the self-sealing valve 2. Specifically, the height of the support ribs 3 along the axis of the vacuum nozzle gradually increases from the edge to the center of the self-sealing valve 2. When the vacuum nozzle is pressed against the battery, the vacuum nozzle and the battery filling port achieve surface contact, improving the stability of the connection.

[0020] The axial cross-section of the valve receiving chamber 5 is trapezoidal, which is convenient for receiving the self-sealing valve 2 .

[0021] The negative pressure channel includes a nozzle fixing channel 6 and a negative pressure channel 7. One end of the nozzle fixing channel 6 is used to connect to the negative pressure device, and the other end of the nozzle fixing channel 6 is connected to one end of the negative pressure channel 7. The other end of the negative pressure channel 7 is connected to the valve receiving cavity 5.

[0022] 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 to 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0024] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0025] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean 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 present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0026] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments made by ordinary technicians in this field are all within the scope of protection of the present invention.

Claims

1. A self-sealing negative pressure nozzle, characterized by: The suction nozzle body comprises a negative pressure channel and a valve receiving chamber, one end of the negative pressure channel is used to connect a negative pressure device, the other end of the negative pressure channel is connected to one end of the valve receiving chamber, the other end of the valve receiving chamber is provided with a self-sealing valve, the self-sealing valve is provided with a plurality of radial incisions, the plurality of radial incisions intersect at the center point of the self-sealing valve, and the side of the self-sealing valve away from the valve receiving chamber is also provided with a supporting rib, when the supporting rib is subjected to force, the radial incision opens, and when the supporting rib is unloaded, the radial incision closes.

2. The self-sealing negative pressure forming nozzle according to claim 1, characterized in that: The radial incision cuts the self-sealing valve into a plurality of fan-shaped membrane flaps, and each of the fan-shaped membrane flaps is correspondingly provided with a supporting rib.

3. The self-sealing negative pressure forming nozzle according to claim 1 or 2, characterized in that: There are more than three radial cuts.

4. The self-sealing negative pressure forming nozzle according to claim 1 or 2, characterized in that: The support rib is a wedge-shaped structure, and the bottom surface of the support rib is inclined downward from the edge to the center of the self-sealing valve.

5. The self-sealing negative pressure forming nozzle according to claim 1, characterized in that: The axial cross-section of the valve receiving cavity is trapezoidal.

6. The self-sealing negative pressure forming nozzle according to claim 1, characterized in that: The negative pressure channel includes a nozzle fixing channel and a negative pressure channel, one end of the nozzle fixing channel is used to connect to the negative pressure device, the other end of the nozzle fixing channel is connected to one end of the negative pressure channel, and the other end of the negative pressure channel is connected to the valve receiving cavity.

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