Floating suction nozzle ejector pin matching structure for battery formation

Abstract

A battery formation floatable suction nozzle ejector pin matching structure comprises a probe seat, the periphery of the probe seat is provided with a limiting round surface, a floatable negative pressure rod is arranged in the inclined inner wall of the probe seat in a penetrating manner, one longitudinal end of the negative pressure rod is connected with a locking nut, the other end of the negative pressure rod is connected with a negative pressure rod ejector pin, and the periphery of the negative pressure rod ejector pin is connected with a guide sleeve; a spring is connected between the guide sleeve and the limiting round face, a secondary guide sleeve is arranged at the tail end of the negative pressure rod ejector pin and is in butt joint with a battery liquid injection opening, and the battery liquid injection opening is connected with a battery cover plate. Through two-time reliable positioning, the offset of a battery liquid injection port relative to the center shaft of the negative pressure rod is offset, hard contact of parts during deviation is avoided, the risk of battery damage and liquid leakage is greatly reduced, the yield of batteries is improved, and the battery liquid injection port positioning device is simple in structure and suitable for large-scale production.

Description

Technical Field

[0001] The utility model relates to a battery formation floating nozzle ejector matching structure, belonging to the technical field of battery negative pressure formation testing. Background Art

[0002] Since its invention, lithium-ion batteries have been widely used due to their advantages such as high energy density, long service life, light weight and low self-discharge. Currently, lithium-ion batteries are mainly used in mobile electronic devices, electric bicycles and electric vehicles.

[0003] During the production of lithium batteries, the positive and negative electrode materials inside the lithium batteries need to be activated through a certain charging and discharging method to improve the battery's charging and discharging performance and comprehensive performance such as self-discharge and storage. This process is called formation. The process of sorting the battery capacity and screening and grading its performance through charging and discharging is called capacity separation. In the current charging and discharging formation process of lithium batteries, the formation mechanism usually needs to absorb the electrolyte inside the power blade battery and the negative pressure gas generated by charging and discharging, so as to improve the stability of the battery's negative pressure formation. When the mechanism's suction nozzle and the battery filling port are working, it is often easy to cause the suction nozzle and the filling port to be unable to be completely aligned due to factors such as the battery processing accuracy, the placement accuracy of the battery in the tray, the processing error of the formation equipment and the cumulative error of the installation, resulting in accidents such as leakage in the process, causing the battery quality to deteriorate or even be scrapped.

[0004] Patent publication number CN 111540784 A discloses a negative pressure nozzle device that uses a spring mounted on a sliding rod to connect a fixed head and the negative pressure nozzle. The conical shape of the negative pressure nozzle improves its guidance and floating capabilities in practical applications, reducing the risk of damage to the device due to misalignment between the negative pressure nozzle and the battery filling port. However, this design still fails to self-correct when the central axis of the negative pressure nozzle deviates significantly from the battery filling port, which can easily cause damage to the device. Summary of the Invention

[0005] In response to the above-mentioned problems, the utility model proposes a battery formation floating suction nozzle ejector supporting structure. The core concept is that a guide sleeve with a guide shape enables the negative pressure rod to self-correct the deviation when it deviates from the battery filling port, thereby completing the docking without hard contact between the negative pressure suction nozzle head and the battery filling port.

[0006] The battery formation floating nozzle ejector supporting structure includes a floating nozzle probe group 100, the front end of the floating nozzle probe group 100 includes a guide sleeve 150 that cooperates with the battery filling port 200; it also includes a probe seat 130, the front end of the probe seat 130 is provided with a limiting circular surface, and a hollow negative pressure rod 120 is passed through the through hole on the central axis of the limiting circular surface; the negative pressure rod 120 is defined to extend along the central axis, and the contact surface between the negative pressure rod 120 and the probe seat 130 is inclined to the central axis of the negative pressure rod, and the diameter of the negative pressure rod 120 at the contact surface gradually increases. retract forward; the rear end of the negative pressure rod 120 is connected to the locking nut 110, and the locking nut 110 is connected to the external corrosion-resistant air pipe; the front end of the negative pressure rod 120 is connected to the negative pressure rod ejector 160 pointing to the battery filling port 200, and a guide sleeve 150 is provided around the negative pressure rod ejector 160, and the inner wall of the guide sleeve 150 is a conical surface that gradually expands forward; a spring 140 is sleeved on the negative pressure rod 120, and the front and rear ends of the spring 140 respectively contact the limiting circular surface and the guide sleeve 150; the axial through hole of the negative pressure rod ejector 160 is connected to the axial through hole of the negative pressure rod 120.

[0007] More specifically, the outer diameter of the negative pressure rod ejector pin 160 gradually decreases from the end thereof connected to the negative pressure rod 120 to the end thereof connected to the battery liquid filling port 200 .

[0008] More specifically, the negative pressure rod ejector pin 160 is connected to the guide sleeve 150 via threads.

[0009] More specifically, the locking nut 110 , the negative pressure rod 120 , the probe seat 130 , the spring 140 , the guide sleeve 150 and the negative pressure rod ejector pin 160 are all made of corrosion-resistant stainless steel; the battery filling port 200 is made of EPDM.

[0010] More specifically, the diameter of the secondary guide tip 161 at the end of the negative pressure rod ejector pin 160 is significantly smaller than the battery liquid filling port 200 , and the negative pressure rod is guided by contacting the inner wall of the battery liquid filling port 200 .

[0011] More specifically, the negative pressure suction rod ejector pin not only plays a guiding role during the process of negative pressure extraction of battery electrolyte, but also can puncture the electrolyte crystals remaining in the liquid injection port 200.

[0012] During actual operation, the probe seat 130 is pushed toward the battery filling port 200 by the external motion mechanism, so that the end of the negative pressure rod ejector pin 160 on the central axis of the negative pressure rod 120 is docked with the battery filling port 200, and finally the end of the negative pressure rod ejector pin 160 slides into the filling port in the middle of the battery filling port 200, and the guide sleeve 150 is sleeved on the periphery of the boss where the battery filling port 200 is located to complete the docking, and the negative pressure rod ejector pin 160 begins to extract the battery electrolyte under negative pressure; in some cases, the placement accuracy of the battery or the installation error causes the end of the negative pressure rod ejector pin 160 to deviate from the central axis of the battery filling port 200 and fail to align with the filling port of the battery filling port 200. At this time, the boss 200 of the battery filling port 200 01 Due to the offset contact with the inner side of the guide sleeve 150, the guide sleeve 150 and the negative pressure rod 120 connected to the guide sleeve 150 are pushed backward together. At this time, the negative pressure rod 120 is loosened from the forward-retracted inner wall of the through hole of the probe seat 130, and the boss 201 slides on the conical inner wall of the guide sleeve 150. The boss 201 is gradually aligned with the center axis of the guide sleeve 150, and the ejector pin 160 slides obliquely toward the battery filling port 200, thereby compensating for the deviation of the center axis of the negative pressure rod 120 from the battery filling port 200. The diameter of the secondary guide tip 161 at the end of the negative pressure rod ejector pin 160 is significantly smaller than the battery filling port 200. The negative pressure rod is guided by contacting the inner wall of the battery filling port 200 to complete the positioning.

[0013] Compared with the existing technology, the beneficial effect of the present invention is that: through two reliable positionings, the offset of the battery filling port compared to the central axis of the negative pressure rod is offset, hard contact of the components during deviation is avoided, the risk of battery damage and leakage is greatly reduced, and the battery yield is improved. It has a simple structure and is suitable for large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of a battery formation floating suction nozzle ejector supporting structure of the utility model.

[0015] Figure 2 This is the internal structure diagram of the utility model.

[0016] Figure 3 It is the front view of the component appearance of the utility model.

[0017] Figure 4 This is a schematic diagram of the working state of the utility model when the ejector pin of the negative pressure rod deviates from the battery filling port. DETAILED DESCRIPTION

[0018] The following describes the specific implementation of the embodiment of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the embodiment of the present invention and is not intended to limit the embodiment of the present invention.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0023] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described 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 features of different embodiments or examples without contradiction.

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in combination with exemplary embodiments.

[0025] The battery formation floating nozzle ejector supporting structure includes a floating nozzle probe group 100, the front end of the floating nozzle probe group 100 includes a guide sleeve 150 that cooperates with the battery filling port 200; it also includes a probe seat 130, the front end of the probe seat 130 is provided with a limiting circular surface, and a hollow negative pressure rod 120 is passed through the through hole on the central axis of the limiting circular surface; the negative pressure rod 120 is defined to extend along the central axis, and the contact surface between the negative pressure rod 120 and the probe seat 130 is inclined to the central axis of the negative pressure rod, and the diameter of the negative pressure rod 120 at the contact surface gradually increases. retract forward; the rear end of the negative pressure rod 120 is connected to the locking nut 110, and the locking nut 110 is connected to the external corrosion-resistant air pipe; the front end of the negative pressure rod 120 is connected to the negative pressure rod ejector 160 pointing to the battery filling port 200, and a guide sleeve 150 is provided around the negative pressure rod ejector 160, and the inner wall of the guide sleeve 150 is a conical surface that gradually expands forward; a spring 140 is sleeved on the negative pressure rod 120, and the front and rear ends of the spring 140 respectively contact the limiting circular surface and the guide sleeve 150; the axial through hole of the negative pressure rod ejector 160 is connected to the axial through hole of the negative pressure rod 120.

[0026] More specifically, the outer diameter of the negative pressure rod ejector pin 160 gradually decreases from the end thereof connected to the negative pressure rod 120 to the end thereof connected to the battery liquid filling port 200 .

[0027] More specifically, the negative pressure rod ejector pin 160 is connected to the guide sleeve 150 via threads.

[0028] More specifically, the locking nut 110 , the negative pressure rod 120 , the probe seat 130 , the spring 140 , the guide sleeve 150 and the negative pressure rod ejector pin 160 are all made of corrosion-resistant stainless steel; the battery filling port 200 is made of EPDM.

[0029] More specifically, the diameter of the secondary guide tip 161 at the end of the negative pressure rod ejector pin 160 is significantly smaller than the battery liquid filling port 200 , and the negative pressure rod is guided by contacting the inner wall of the battery liquid filling port 200 .

[0030] More specifically, the negative pressure suction rod ejector pin not only plays a guiding role during the process of negative pressure extraction of battery electrolyte, but also can puncture the electrolyte crystals remaining in the liquid injection port 200.

[0031] During actual operation, the probe seat 130 is pushed toward the battery filling port 200 by the external motion mechanism, so that the end of the negative pressure rod ejector pin 160 on the central axis of the negative pressure rod 120 is docked with the battery filling port 200, and finally the end of the negative pressure rod ejector pin 160 slides into the filling port in the middle of the battery filling port 200, and the guide sleeve 150 is sleeved on the periphery of the boss where the battery filling port 200 is located to complete the docking, and the negative pressure rod ejector pin 160 begins to extract the battery electrolyte under negative pressure; in some cases, the placement accuracy of the battery or the installation error causes the end of the negative pressure rod ejector pin 160 to deviate from the central axis of the battery filling port 200 and fail to align with the filling port of the battery filling port 200. At this time, the boss 200 of the battery filling port 200 01 Due to the offset contact with the inner side of the guide sleeve 150, the guide sleeve 150 and the negative pressure rod 120 connected to the guide sleeve 150 are pushed backward together. At this time, the negative pressure rod 120 is loosened from the forward-retracted inner wall of the through hole of the probe seat 130, and the boss 201 slides on the conical inner wall of the guide sleeve 150. The boss 201 is gradually aligned with the center axis of the guide sleeve 150, and the ejector pin 160 slides obliquely toward the battery filling port 200, thereby compensating for the deviation of the center axis of the negative pressure rod 120 from the battery filling port 200. The diameter of the secondary guide tip 161 at the end of the negative pressure rod ejector pin 160 is significantly smaller than the battery filling port 200. The negative pressure rod is guided by contacting the inner wall of the battery filling port 200 to complete the positioning.

[0032] Compared with the existing technology, the beneficial effect of the present invention is that: through two reliable positionings, the offset of the battery filling port compared to the central axis of the negative pressure rod is offset, hard contact of the components during deviation is avoided, the risk of battery damage and leakage is greatly reduced, and the battery yield is improved. It has a simple structure and is suitable for large-scale production.

[0033] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A battery formation floating nozzle ejector supporting structure, characterized by: The invention comprises a floating nozzle probe group (100), the front end of which comprises a guide sleeve (150) cooperating with a battery filling port (200); and a probe seat (130), the front end of which is provided with a limiting circular surface, and a hollow negative pressure rod (120) is passed through a through hole on the central axis of the limiting circular surface; the negative pressure rod (120) is defined to extend along the central axis, the contact surface between the negative pressure rod (120) and the probe seat (130) is inclined to the central axis of the negative pressure rod, and the diameter of the negative pressure rod (120) at the contact surface gradually shrinks forward; the rear of the negative pressure rod (120) The end is connected to a locking nut (110), and the locking nut (110) is connected to an external corrosion-resistant air pipe; the front end of the negative pressure rod (120) is connected to a negative pressure rod ejector pin (160) pointing to the battery liquid filling port (200), and a guide sleeve (150) is provided around the negative pressure rod ejector pin (160), and the inner wall of the guide sleeve (150) is in a trumpet shape that gradually expands forward; a spring (140) is sleeved on the negative pressure rod (120), and the longitudinal ends of the spring (140) respectively contact the limiting circular surface and the guide sleeve (150); the axial through hole of the negative pressure rod ejector pin (160) is connected to the axial through hole of the negative pressure rod (120).

2. A battery formation floating nozzle ejector supporting structure according to claim 1, characterized in that: The outer diameter of the negative pressure rod ejector pin (160) gradually decreases from the end connected to the negative pressure rod (120) to the end connected to the battery liquid injection port (200).

3. A battery formation floating nozzle ejector supporting structure according to claim 1, characterized in that: The negative pressure rod ejector pin (160) is connected to the guide sleeve (150) via threads.

4. A battery formation floating nozzle ejector supporting structure according to claim 1, characterized in that: The locking nut, negative pressure rod, probe seat, spring, guide sleeve and negative pressure rod ejector pin are all made of corrosion-resistant stainless steel; the battery filling port is made of EPDM.

5. A battery formation floating nozzle ejector supporting structure according to claim 1, characterized in that: The diameter of the secondary guide tip (161) at the end of the negative pressure rod ejector pin (160) is significantly smaller than that of the battery liquid injection port (200), and the negative pressure rod is guided by contacting the inner wall of the battery liquid injection port (200).

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