A formation mechanism

Abstract

This invention discloses a formation mechanism, comprising a probe holder, a second probe, and a negative pressure assembly. The probe holder has a negative pressure channel. The second probe is disposed on the probe holder and is used for charging and discharging the battery. The negative pressure assembly includes a suction nozzle for engaging with the battery's electrolyte inlet. The negative pressure channel provides clearance for the negative pressure assembly, allowing it to draw negative pressure onto the battery. The second probe, disposed on the probe holder and on the same side, can simultaneously charge cylindrical lithium batteries. The suction nozzle, connected to the negative pressure channel and the electrolyte inlet of the cylindrical lithium battery, allows the probe to draw negative pressure onto the center of the cylindrical lithium battery's terminals, thereby improving the manufacturing process and ultimately enhancing the quality of the cylindrical lithium batteries.

Description

Technical Field

[0001] This invention relates to the technical field of cylindrical lithium batteries, and particularly to a formation mechanism. Background Technology

[0002] The probes in existing cylindrical lithium battery formation and capacity testing equipment are divided into two parts: an upper positive electrode probe presses against the positive electrode of the battery, and a lower negative electrode probe presses against the negative electrode of the battery. However, the pressing of the upper and lower probes results in a high overall height of the mechanical unit, occupying a large space; at the same time, the existing probe structure cannot achieve negative pressure extraction for cylindrical lithium batteries with the liquid injection port located in the center of the positive electrode post, which cannot meet the negative pressure process requirements in battery production. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a formation mechanism for performing negative pressure formation on cylindrical lithium batteries.

[0004] According to an embodiment of the present invention, the formation mechanism includes: a probe holder, a second probe, and a negative pressure assembly. The probe holder has a negative pressure channel. The second probe is disposed on the probe holder and is used to charge and discharge the battery. The negative pressure assembly includes a suction nozzle for engaging with the electrolyte inlet of the battery. The negative pressure channel is used to allow space for the negative pressure assembly so that the negative pressure assembly can draw negative pressure from the battery.

[0005] The formation mechanism according to an embodiment of the present invention has at least the following beneficial effects: the second probe is disposed on the probe holder and can charge and discharge the cylindrical lithium battery. At the same time, the suction nozzle of the negative pressure component is also disposed on the probe holder. The suction nozzle is connected to the liquid injection port of the cylindrical lithium battery. The suction nozzle draws negative pressure on the cylindrical lithium battery and quickly discharges the waste gas generated by the formation inside the battery, thereby improving the production process of the cylindrical lithium battery and thus improving the quality of the cylindrical lithium battery.

[0006] According to some embodiments of the present invention, the probe further includes a first probe disposed on the probe holder. The first probe is used to measure the voltage of the battery.

[0007] According to some embodiments of the present invention, both the first probe and the second probe include a positive probe and a negative probe, wherein the positive probe and the negative probe have the same structure.

[0008] According to some embodiments of the present invention, the probe holder is provided with four first receiving holes, and the positive probe and the negative probe are both in the shape of annular columns, and the positive probe and the negative probe are respectively movably disposed in the corresponding first receiving holes.

[0009] According to some embodiments of the present invention, both the positive electrode probe and the negative electrode probe are provided with a second receiving hole, and a first elastic element is provided in the second receiving hole.

[0010] According to some embodiments of the present invention, the first receiving hole includes a probe receiving hole and an elastic element receiving hole. The elastic element receiving hole is disposed in the probe receiving hole. The probe receiving hole is a through hole penetrating the probe seat. A blocking part is provided in the elastic element receiving hole. One end of the first elastic element abuts against the inner sidewall of the second receiving hole, and the other end of the first elastic element abuts against the blocking part.

[0011] According to some embodiments of the present invention, a first protrusion is provided in the second receiving hole, and the first protrusion is engaged with one end of the first elastic member.

[0012] According to some embodiments of the present invention, the probe further includes a limiting member, the probe holder is provided with a limiting hole for accommodating the limiting member, and the limiting member passes through the second receiving hole.

[0013] According to some embodiments of the present invention, the first distance is the distance from the inner sidewall of the second receiving hole away from the opening end of the elastic element receiving hole to the opening end of the elastic element receiving hole, and the second distance is the distance from the blocking part to the opening end of the elastic element receiving hole, wherein the first distance is greater than the second distance.

[0014] According to some embodiments of the present invention, the suction nozzle is provided with second protrusions on both sides.

[0015] According to some embodiments of the present invention, a temperature probe is provided on the probe holder.

[0016] According to some embodiments of the present invention, the negative pressure assembly includes a negative pressure cup, a connecting tube is provided on the negative pressure cup, the connecting tube passes through the negative pressure channel and communicates with the suction nozzle.

[0017] According to some embodiments of the present invention, a second elastic element is sleeved on the connecting tube, the second elastic element is disposed in the negative pressure channel, and the two ends of the second elastic element abut against the suction nozzle and the probe seat respectively.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1This is a schematic diagram of the formation mechanism according to an embodiment of the present invention;

[0021] Figure 2 for Figure 1 A schematic diagram of the explosion of the probe of the formation mechanism is shown;

[0022] Figure 3 for Figure 2 The diagram shown illustrates the explosion of the probe.

[0023] Figure 4 for Figure 3 A magnified schematic diagram of a portion of the probe is shown;

[0024] Figure 5 for Figure 3 A partially enlarged schematic diagram of the probe holder is shown;

[0025] Figure 6 for Figure 1 A side view of the formation mechanism is shown;

[0026] Figure 7 for Figure 1 A top view of the formation mechanism is shown;

[0027] Figure 8 for Figure 6 A half-section schematic diagram of the probe of the formation mechanism is shown.

[0028] Figure label:

[0029] Probe holder 10, negative pressure channel 11, first receiving hole 12, elastic element receiving hole 13, blocking part 131, orifice end 132, probe receiving hole 16, limiting element 14, limiting hole 141;

[0030] First probe 20, first positive probe 21, first negative probe 22, second receiving hole 23, inner sidewall 233, first elastic element 231, first protrusion 232;

[0031] Second probe 30, second positive probe 31, second negative probe 32;

[0032] Nozzle 40, second protrusion 41;

[0033] Temperature probe 50, third elastic element 51, mounting hole 15;

[0034] Negative pressure cup 60, connecting pipe 62, second elastic element 61. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below, examples of which are shown 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 the present invention, and should not be construed as limiting the present invention.

[0036] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0037] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0038] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0039] Reference Figures 1 to 3 According to an embodiment of the present invention, the formation mechanism includes: a probe holder 10, a second probe 30, and a negative pressure assembly. The probe holder 10 has a negative pressure channel 11, which connects the battery's electrolyte inlet to the negative pressure assembly's suction port, allowing the negative pressure assembly to draw negative pressure at the battery's electrolyte inlet via the negative pressure channel 11. The second probe 30 is disposed on the probe holder 10 and is used for charging and discharging the battery. The negative pressure assembly includes a suction nozzle 40, which is used to engage with the battery's electrolyte inlet. The negative pressure channel 11 provides clearance for the negative pressure assembly. The suction nozzle 40 is disposed on the probe holder 10 and located on the negative pressure channel 11, and is used to draw negative pressure from the battery.

[0040] Specifically, the second probe 30 is disposed on the probe holder 10 and located on the same side of the probe holder 10, and can charge and discharge the cylindrical lithium battery. At the same time, a suction nozzle 40 of the negative pressure assembly is also disposed on the negative pressure channel 11 on the probe holder 10. The suction nozzle 40 is connected to the liquid injection port of the cylindrical lithium battery. The formation mechanism can use the negative pressure assembly to draw negative pressure on the center of the cylindrical lithium battery terminal through the negative pressure channel 11, and quickly discharge the waste gas generated by the formation inside the battery, thereby improving the production process of the cylindrical lithium battery and thus improving the quality of the cylindrical lithium battery.

[0041] Reference Figures 1 to 3 In some embodiments of the present invention, the formation mechanism further includes a first probe 20, which is disposed on the probe holder 10 and is used to measure the voltage of the battery. Specifically, when the probe contacts the terminal surface of the cylindrical lithium battery, the first probe 20 and the second probe 30 simultaneously contact the corresponding battery terminal. The cylindrical lithium battery is charged and discharged through the second probe 30, and the voltage during charging is detected by the first probe 20, thereby monitoring the formation condition of the cylindrical lithium battery.

[0042] Reference Figures 2 to 3 In some embodiments of the present invention, the first probe 20 and the second probe 30 each include a positive electrode probe and a negative electrode probe, namely a first positive electrode probe 21 and a first negative electrode probe 22, a second positive electrode probe 31 and a second negative electrode probe 32, respectively. The positive and negative electrode probes have the same structure, as shown in the figure; both the positive and negative electrode probes of the first probe 20 and the second probe 30 are in the shape of a ring-shaped plate. The ring-shaped probe has a circular cross-sectional area, which allows for better contact with the cylindrical lithium battery electrode surface, ensuring sufficient contact area between the probe and the battery electrode, and thus ensuring stable current flow capability. Furthermore, when the nozzle 40 of the probe is in contact with the battery's filling port, most of the electrode area is occupied; the ring-shaped plate shape ensures that the probe has sufficient area to contact the battery electrode surface. Moreover, the plate-shaped probe has a large heat dissipation area, which is beneficial for charging and discharging the battery, meeting charging and discharging requirements.

[0043] It is also understandable that the cross-sectional area of ​​the ring-shaped probe is circular. In addition to better fitting the cylindrical lithium battery terminal surface to ensure the probe's contact area with the battery terminal, it can also improve the stability of the contact surface and prevent the probe from tilting when pressing the battery terminal.

[0044] It is understandable that the first probe 20 and the second probe 30 can be symmetrically arranged on the probe holder 10, that is, the first positive probe 21 and the second positive probe 31 are symmetrically arranged on the probe holder 10, and the first negative probe 22 and the second negative probe 32 are symmetrically arranged on the probe holder 10. Meanwhile, to increase heat dissipation, the distance between the positive and negative probes of the second probe 30 used for charging and discharging the battery can be increased, and the positions of the first negative probe 22 and the second negative probe 32 can be swapped to avoid excessive concentration of high-current probes, thereby improving the heat dissipation effect.

[0045] Reference Figure 3 as well as Figure 4 In some embodiments of the present invention, the probe holder 10 is further provided with four first receiving holes 12. The positive probes of the first probe 20 and the negative probes of the second probe 30 are movably disposed in the corresponding first receiving holes 12. At the same time, the terminals of the first probe 20 and the positive and negative probes of the second probe 30 pass through the first receiving holes 12 and reach the other side of the probe holder 10 to facilitate probe wiring. Specifically, the first positive probe 21 and the second positive probe 31 are disposed inside the probe holder 10, i.e., on both sides of the nozzle 40, while the first negative probe 22 and the second negative probe 32 are disposed outside the probe holder 10, i.e., on the right side of the first positive probe 21 and on the left side of the second positive probe 31, respectively. It should be noted that the relative positions of the first probe 20 and the second probe 30 are not specifically limited, and the installation positions of the first probe 20 and the second probe 30 can be interchanged. Correspondingly, the wiring can be changed.

[0046] It should be noted that the positive and negative probes of the first probe 20 and the second probe 30 are both located on the same side of the probe holder 10, abandoning the traditional probe structure with the positive and negative electrodes on different sides in cylindrical lithium batteries. This avoids the situation where pressing the upper and lower probes together results in a high overall height of the mechanical unit and a large space occupation. At the same time, it also facilitates the integration of the suction nozzle 40 into the probe holder 10 for applying negative pressure to the cylindrical lithium battery.

[0047] It should also be noted that the symmetrical arrangement of the first probe 20 and the second probe 30 can improve the stability of the probe when pressing the battery terminals, so as to balance the pressing force of the probe on the battery terminals, thereby avoiding the battery from tilting, thus ensuring effective pressing contact between the probe and the battery, and ultimately ensuring the testing of the battery's charging, discharging and voltage.

[0048] Reference Figures 3 to 5In some embodiments of the present invention, a second receiving hole 23 is further provided on both the positive and negative probes of the first probe 20 and the second probe 30, and a first elastic member 231 is provided in the second receiving hole 23. Specifically, the second receiving hole 23 extends along the length of the probe and is a long strip-shaped through hole, the depth of which is the thickness of the probe. Therefore, it can be understood that both ends of the first elastic member 231 abut against the inner sidewall 233 of the second receiving hole 23, that is, on the inner sidewall 233 of the upper and lower sides of the second receiving hole 23 as shown in the figure.

[0049] Specifically, refer to Figures 3 to 5 as well as Figure 8 In some embodiments of the present invention, as mentioned above, the first receiving hole 12 may include a probe receiving hole 16 and an elastic element receiving hole 13, with the elastic element receiving hole 13 disposed within the probe receiving hole 16. It should be noted that the probe receiving hole 16 is used to accommodate the probe, therefore its cross-sectional shape is an incomplete annular shape. Simultaneously, the probe receiving hole 16 is a through hole penetrating the probe holder 10, allowing one end of the probe's wiring to pass through the probe holder 10 to the other side of the probe holder 10, facilitating probe wiring. The elastic element receiving hole 13 is disposed within the probe receiving hole 16. It is conceivable that the cross-sectional shape of the elastic element receiving hole 13 is adapted to or larger than the cross-sectional shape of the first elastic element 231, so that when the probe is inserted into the probe holder 10, the first elastic element 231 can be accommodated within the probe holder 10. More specifically, a blocking part 131 is provided in the elastic element receiving hole 13. One end of the first elastic element 231 abuts against the inner sidewall 233 on the upper side of the second receiving hole 23, while the other end of the first elastic element 231 abuts against the blocking part 131 in the elastic element receiving hole 13, so that the probe can be elastically pressed with the battery, which can alleviate the pressing impact and ensure the reliability of the pressing.

[0050] Therefore, when the contact surface of the probe is pressed onto the battery terminal, in order to ensure a tight contact, the probe can be pressed onto the battery terminal as much as possible. Under the elastic buffering effect of the first elastic element 231, the end of the probe is prevented from directly impacting the battery terminal. This can help the probe press onto the battery terminal while also protecting the battery and the probe.

[0051] It should be noted that the first elastic element 231 may be a spring or an elastic rubber strip, etc. In this embodiment of the invention, the structure of the first elastic element 231 is not specifically limited, as long as it can provide buffer protection when the probe presses the battery terminal.

[0052] Reference Figure 4In some embodiments of the present invention, a first protrusion 232 is further provided in the second receiving hole 23, and the first protrusion 232 is engaged with one end of the first elastic member 231. Specifically, as shown in the figure, the first protrusion 232 can be provided on the inner sidewalls 233 on the upper and lower sides of the second receiving hole 23, so that one end of the first elastic member 231 can be engaged with the first protrusion 232, thereby preventing the first elastic member 231 from falling out of the second receiving hole 23 and facilitating assembly.

[0053] Reference Figure 3 In some embodiments of the present invention, the formation mechanism further includes a limiting member 14. The probe holder 10 is provided with a limiting hole 141 for accommodating the limiting member 14, and the limiting member 14 passes through the second receiving hole 23. As shown in the figure, the hole axis of the limiting hole 141 is horizontally arranged and communicates with the first receiving hole 12, specifically with the probe receiving hole 16. That is, the limiting hole 141 is located below the elastic member receiving hole 13, and the limiting member 14, which is accommodated in the limiting hole 141, can pass through the second receiving hole 23. The probe should then pass through the first receiving hole 12. A pin can be used as the limiting member 14, passing through the limiting hole 141 and simultaneously through the second receiving hole 23. The limiting member 14, passing through the elastic member receiving hole 13, can restrict the movement of the probe and prevent the probe from falling off one side of the probe holder 10. At the same time, the first elastic member 231 can adjust the pressing force and pressing stroke to avoid excessive pressing of the probe and damage to the battery terminal.

[0054] Reference Figure 8 In some embodiments of the present invention, the first distance is the distance from the inner wall 233 of the second receiving hole 23 away from the opening end 132 of the elastic element receiving hole 13 to the opening end 132 of the elastic element receiving hole 13, and the second distance is the distance from the blocking part 131 to the opening end 132 of the elastic element receiving hole 13. The first distance is greater than the second distance. As shown in the figure, the opening end 132 of the elastic element receiving hole 13 is the opening end of the elastic element receiving hole 13 on one side of the upper end face of the probe seat 10. Therefore, the inner wall 233 of the second receiving hole 23 away from the opening end 132 of the elastic element receiving hole 13 is the inner wall 233 of the lower end of the second receiving hole 23 shown in the figure. The distance from this inner wall 233 to the opening end 132 is the first distance. The second distance is the length of the elastic element receiving hole 13. The first distance being greater than the second distance ensures that when the probe is assembled into the first receiving hole 12, the limiting member 14 passes through the second receiving hole 23. It also prevents the lower end of the first elastic member 231 from abutting against the inner wall 233 of the lower end of the second receiving hole 23 and interfering with the assembly of the limiting member 14.

[0055] Reference Figure 3 as well as Figure 7In some embodiments of the present invention, the suction nozzle 40 is provided with second protrusions 41 on both sides. The second protrusions 41 are symmetrically arranged on the suction nozzle 40, and the bottom of the second protrusions 41 can abut against the upper surface of the probe seat 10. When the probe is pressed onto the cylindrical lithium battery terminal, the suction nozzle 40 abuts against the liquid injection port on the cylindrical lithium battery, and each of the first probes 20 and the second probes 30 moves downward continuously, so the second protrusions 41 can abut against the upper surface of the probe seat 10. When the probe is pressed into place, the probe stops pressing, and the second protrusions 41 play a supporting role for the suction nozzle 40, which can prevent the suction nozzle 40 from tipping over under the pressure of the liquid injection port during the pressing process, causing the suction nozzle 40 to fail to align with the liquid injection port of the cylindrical lithium battery. In addition, the external second protrusions 41 can also facilitate the disassembly, cleaning, or assembly of the suction nozzle 40.

[0056] Reference Figure 1 as well as Figure 2 In some embodiments of the present invention, a temperature probe 50 is further provided on the probe holder 10. The temperature probe 50 is movably mounted in the mounting hole 15 via a third elastic member 51. One end of the third elastic member 51 abuts against the surface of the probe holder 10, and the other end of the third elastic member 51 abuts against the temperature probe 50. Specifically, the mounting hole 15 is located on one side of the first receiving hole 12, that is, the temperature probe 50 is located next to the first probe 20 or the second probe 30. When the probe is pressed onto the cylindrical lithium battery terminal, the top end of the temperature probe 50 can abut against the cylindrical lithium battery terminal, and the temperature probe 50 can monitor the temperature of the battery. The third elastic element 51, fitted onto the temperature probe 50, abuts against the upper surface of the probe holder 10 at one end and against the protruding portion at the upper end of the temperature probe 50 at the other end. During the pressing process, the temperature probe 50 moves within the mounting hole 15, thus pressing against the third elastic element 51. Therefore, the third elastic element 51 acts as a buffer for the temperature probe 50 during pressing, preventing it from directly impacting the terminal of the cylindrical lithium battery, ensuring reliable contact between the probe and the battery, and thus protecting both the temperature probe 50 and the cylindrical lithium battery. It should be noted that the third elastic element 51 can optionally be a spring or elastic rubber.

[0057] Reference Figure 1 , Figure 6 as well as Figure 7According to an embodiment of the present invention, the formation mechanism includes a negative pressure assembly, which further includes a negative pressure cup 60. A connecting tube 62 is disposed on the negative pressure cup 60, and the connecting tube 62 passes through the negative pressure channel 11 and communicates with the suction nozzle 40. The first probe 20, the second probe 30, and the suction nozzle 40 on the formation mechanism are integrated on one side of the probe holder 10, that is, above the probe holder 10 as shown in the figure. At the same time, the negative pressure assembly is integrated below the probe holder 10. Therefore, the existing negative electrode probe below the probe holder 10 is eliminated, which can greatly reduce the space below the battery, thereby saving space and compressing the overall height of the mechanical unit. This creates a precedent for the application of negative pressure extraction at the center of the cylindrical lithium battery terminal, and improves the production process of cylindrical lithium batteries.

[0058] Reference Figure 2 , Figure 6 as well as Figure 7 A second elastic element 61 is sleeved on the connecting tube 62 and is disposed within the negative pressure channel 11. The two ends of the second elastic element 61 abut against the nozzle 40 and the probe seat 10, respectively. During the formation process, the formation mechanism is pressed onto the terminals of the cylindrical lithium battery. The first positive electrode probe 21 and the first negative electrode probe 22 of the first probe 20 are pressed onto the battery terminals for voltage testing. The second positive electrode probe 31 and the second negative electrode probe 32 of the second probe 30 are pressed onto the battery terminals for charging and discharging. Simultaneously, the nozzle 40 at the center of the probe seat 10 is pressed onto the electrolyte inlet at the center of the battery to apply negative pressure. During the probe pressing process, the nozzle 40 slowly presses against the electrolyte inlet, and the second elastic element 61 is gradually compressed under the pressure of the nozzle 40, thus allowing the nozzle 40 to slowly press against the electrolyte inlet, preventing the nozzle 40 from directly impacting the center of the battery and damaging it.

[0059] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A formation mechanism, characterized in that, include: The probe holder has a negative pressure channel. The second probe is disposed on the probe holder and is used to charge and discharge the battery. A first probe is disposed on the probe holder and is used to measure the voltage of the battery. Both the first probe and the second probe include a positive probe and a negative probe. The first probe includes a first positive probe and a first negative probe, and the second probe includes a second positive probe and a second negative probe. The first positive probe and the second positive probe are symmetrically arranged on the probe holder, and the first negative probe and the second negative probe are symmetrically arranged on the probe holder. A negative pressure assembly, comprising a suction nozzle for engaging with the electrolyte inlet of the battery, and a negative pressure channel for accommodating the negative pressure assembly so that the negative pressure assembly can draw negative pressure from the battery. The probe holder has four first receiving holes, and the positive and negative probes of the first and second probes are respectively movably disposed in the corresponding first receiving holes. The positive and negative probes of the first and second probes are each provided with a second receiving hole, and a first elastic element is provided in the second receiving hole; The first receiving hole includes a probe receiving hole and an elastic element receiving hole. The elastic element receiving hole is disposed in the probe receiving hole. The probe receiving hole is a through hole that penetrates the probe seat. A blocking part is provided in the elastic element receiving hole. One end of the first elastic element abuts against the inner sidewall of the second receiving hole, and the other end of the first elastic element abuts against the blocking part.

2. The formation mechanism according to claim 1, characterized in that, The positive and negative probes of the first and second probes are both in the shape of a ring column, and the positive and negative probes of the first and second probes have the same structure.

3. The formation mechanism according to claim 1, characterized in that, The second receiving hole is provided with a first protrusion, which is engaged with one end of the first elastic member.

4. The formation mechanism according to claim 1, characterized in that, It also includes a limiting member, wherein the probe holder is provided with a limiting hole for accommodating the limiting member, and the limiting member passes through the second receiving hole.

5. The formation mechanism according to claim 1, characterized in that, The first distance is the distance from the inner wall of the second receiving hole away from the opening end of the elastic element receiving hole to the opening end of the elastic element receiving hole, and the second distance is the distance from the blocking part to the opening end of the elastic element receiving hole. The first distance is greater than the second distance.

6. A formation mechanism according to claim 1, characterized in that, The nozzle has a second protrusion on both sides.

7. A formation mechanism according to claim 1, characterized in that, A temperature probe is installed on the probe holder.

8. A formation mechanism according to any one of claims 1-7, wherein the negative pressure assembly further includes a negative pressure cup, the negative pressure cup being provided with a connecting tube, the connecting tube passing through the negative pressure channel and communicating with the suction nozzle.

9. A formation mechanism according to claim 8, characterized in that, A second elastic element is sleeved on the connecting tube and disposed inside the negative pressure channel. The two ends of the second elastic element abut against the suction nozzle and the probe seat, respectively.

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