Storage battery lead pole centering assembly structure and use method thereof

Abstract

The invention discloses a storage battery lead pole centering assembly structure and a use method thereof.The storage battery lead pole centering assembly structure comprises a pole and a lead sleeve, the top end of the pole penetrates out of a sleeve hole of the lead sleeve, the pole comprises a cylindrical main body part in clearance fit with the sleeve hole and a penetrating-out part coaxially arranged at the upper end of the main body part, and the diameter of the penetrating-out part is smaller than that of the main body part; the penetrating part is coaxially and detachably connected with a guide sleeve, and the guide sleeve comprises a cylindrical part with the outer diameter consistent with the outer diameter of the main body part and a frustum part arranged at the upper end of the cylindrical part. According to the invention, the pole can be kept in the center when penetrating out of the sleeve hole, so that the phenomenon that a gap between the pole and the inner wall of the sleeve hole exceeds a normal distance due to eccentricity of the pole is avoided, molten lead is prevented from leaking downwards from an overlarge gap, and the safety of the storage battery is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production, and in particular to a battery lead pole centering assembly structure and a use method thereof. Background Art

[0002] In the lead-acid battery manufacturing process, the key to terminal assembly lies in balancing assembly clearance and sealing performance. Existing technology uses lead terminals to connect the busbar and the terminal group. This is achieved by placing a lead sleeve on the battery cover, with a lead terminal wrapped around the outer periphery of the sleeve. The upper end of the lead terminal is passed through the sleeve hole in the lead sleeve, and then the three are fused together using welding to ensure both conductivity and acid sealing.

[0003] In actual production, since the top of the terminal needs to pass through the sleeve hole, if the gap between the terminal and the sleeve hole is too small, even if the top of the terminal is chamfered, the friction during the guiding process will be high due to the soft material of the lead terminal, which can easily bend the terminal during press-fitting, resulting in the terminal not being able to pass through normally. The downward pressure of the terminal may squeeze the plate below the busbar, causing a short circuit and other faults that will cause the battery to be scrapped. Therefore, the gap is usually increased to facilitate the passage of the terminal. However, when the gap is increased, the terminal is prone to eccentric displacement and cannot be coaxial with the sleeve hole. In severe cases, one side of the terminal is close to the inner wall of the sleeve hole, while the other side has a larger gap than the normal distance. As a result, the molten lead material will leak through the gap expanded by the eccentricity during welding, which will cause an internal short circuit. Summary of the Invention

[0004] The object of the present invention is to provide a battery lead terminal centering assembly structure and a method for using the same, which can keep the terminal centered when passing through the sleeve hole, avoid eccentricity causing the gap between the terminal and the inner wall of the sleeve hole to exceed the normal distance, prevent molten lead from leaking through the excessive gap, and improve the safety of the battery.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a battery lead terminal centering assembly structure, including a terminal and a lead sleeve, the top of the terminal extending through the sleeve hole of the lead sleeve, the terminal including a cylindrical main body portion that is gap-fitted with the sleeve hole, and a protrusion portion coaxially arranged at the upper end of the main body portion and having a smaller diameter than the main body portion, the protrusion portion being coaxially and detachably connected to a guide sleeve, the guide sleeve including a cylindrical portion having an outer diameter consistent with that of the main body portion, and a frustum portion provided at the upper end of the cylindrical portion.

[0006] A further improvement of the present invention is that a plurality of vertical guide bars are arranged at intervals along the circumferential direction on the outer circumference of the cylindrical portion, and the outer circumferential surfaces of the guide bars are arranged cocircularly to form guide surfaces, and the guide surfaces are clearance-matched with the inner wall of the sleeve hole.

[0007] A further improvement of the present invention is that a multi-layer ball assembly is axially provided on the outer circumference of the cylindrical portion, and each layer of ball assembly includes at least three receiving grooves evenly distributed along the circumference, and each receiving groove is provided with a spring and a ball protruding from the notch of the receiving groove through the spring portion, and the protruding portion of the ball forms a rolling contact with the inner wall of the sleeve hole.

[0008] A further improvement of the present invention is that the diameter of the slot of the receiving groove is smaller than the diameter of the ball, one end of the spring abuts the bottom of the slot of the receiving groove, and the other end abuts the ball, so that the ball partially protrudes from the slot of the receiving groove.

[0009] A further improvement of the present invention is that the ball assembly is arranged on the guide bar, the number of accommodating grooves in each layer is arranged in a one-to-one correspondence with the number of guide bars, and the balls protrude from the guide surface and form rolling contact with the inner wall of the sleeve hole.

[0010] A further improved solution of the present invention is that the distance between two adjacent layers of accommodating grooves is smaller than the depth of the sleeve hole.

[0011] A further improvement of the present invention is that the fitting clearance between the guide surface and the inner wall of the sleeve hole is less than 0.5 mm.

[0012] A further improved solution of the present invention is that a socket matched with the diameter of the outlet portion is provided in the guide sleeve, and the guide sleeve is slidably connected to the outlet portion via the socket.

[0013] A further improvement of the present invention is that a positioning cone is coaxially provided between the main body and the outlet portion, and the lower end surface of the guide sleeve is provided with a positioning surface that matches the side surface of the positioning cone.

[0014] The present invention also provides a method for using the battery lead terminal centering assembly structure, the method comprising the following steps: S1. Coaxially connect the guide sleeve's socket to the pole's outlet, ensuring the outer diameter of the guide sleeve's cylindrical portion matches the outer diameter of the main body, with the frustum facing upward. S2. Insert the main body of the pole and the cylindrical portion of the guide sleeve into the sleeve hole of the lead sleeve, and use the guide sleeve to guide the pole to the center; S3. Remove the guide sleeve so that the protruding portion is completely exposed outside the sleeve hole.

[0015] The beneficial effects of the present invention are: The present invention provides a pole as a main body and a penetration portion coaxially arranged at the upper end of the main body and having a smaller diameter than the main body, and a guide sleeve coaxially and detachably connected to the penetration portion. The guide sleeve can ensure that the pole remains centered when passing through the sleeve hole, thereby preventing the pole from being eccentric and causing the gap with the inner wall of the sleeve hole to exceed a normal distance, preventing molten lead from leaking through the excessively large gap, and improving the safety of the battery.

[0016] The outer circumference of the cylindrical portion of the present invention is provided with a plurality of vertical guide bars at intervals along the circumferential direction, and the outer circumferential surfaces of the guide bars are cocircularly arranged to form a guide surface, and the guide surface is loosely matched with the inner wall of the sleeve hole. The guide bars are in contact with the inner wall of the sleeve hole, thereby reducing the contact area and facilitating the smooth passage of the guide sleeve through the lead sleeve.

[0017] The present invention converts the sliding friction of the sleeve hole into rolling friction by arranging the ball assembly, thereby further reducing the friction force. In addition, the multiple springs and the balls can improve the centering effect of the pole and the guiding effect.

[0018] The present invention utilizes a guide sleeve for guiding, which can be quickly disassembled after the guiding is completed, will not affect subsequent welding, and can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main cross-section of the structure of Example 1 of the present invention.

[0020] Figure 2 This is a schematic top view of the guide sleeve structure of Example 1 of the present invention.

[0021] Figure 3 This is a schematic diagram of the main cross-sectional view of the structure of Example 2 of the present invention.

[0022] Figure 4 This is a schematic top view of the guide sleeve structure of Example 2 of the present invention.

[0023] In the figure, 1-pole, 2-lead sleeve, 3-sleeve hole, 4-main body, 5-penetrating part, 6-cylindrical part, 7-cone part, 8-guide bar, 9-accommodating groove, 10-spring, 11-ball, 12-jack, 13-positioning cone, 14-battery cover, 15-lead terminal. DETAILED DESCRIPTION

[0024] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1: Combination Figures 1 and 2 As can be seen, a battery lead terminal centering assembly structure includes a terminal 1 and a lead sleeve 2. The top of the terminal 1 extends through the sleeve hole 3 of the lead sleeve 2. The terminal 1 includes a cylindrical main body 4 that is loosely fitted with the sleeve hole 3, and a protrusion 5 coaxially arranged at the upper end of the main body 4 and having a smaller diameter than the main body 4. A guide sleeve is coaxially and detachably connected to the protrusion 5. The guide sleeve includes a cylindrical portion 6 with an outer diameter consistent with that of the main body 4, and a frustum portion 7 disposed at the upper end of the cylindrical portion 6. Optionally, the frustum portion 7 has a cone angle of 30° and a maximum diameter identical to that of the cylindrical portion 6, serving as a guide.

[0026] A plurality of vertical guide bars 8 are arranged at intervals along the circumferential direction on the outer circumference of the cylindrical portion 6 . The outer circumferential surface of each guide bar 8 is cocircularly arranged to form a guide surface, which is in clearance fit with the inner wall of the sleeve hole 3 .

[0027] Preferably, the upper end of the guide bar 8 is provided with an insertion guide surface for facilitating insertion into the sleeve hole 3. The insertion guide surface is a chamfered surface provided on the upper end of the guide bar 8.

[0028] Preferably, there are six guide bars, which are made of hard aluminum alloy.

[0029] The clearance between the guide surface and the inner wall of the sleeve hole 3 is less than 0.5 mm, which is less than the critical value of the surface tension of the lead liquid (the surface tension of the lead liquid in the air is about 450 mN / m, which can block a gap of ≤ 0.6 mm).

[0030] An insertion hole 12 having a diameter matching that of the outlet portion 5 is provided in the guide sleeve, and the guide sleeve is slidably connected to the outlet portion 5 via the insertion hole 12 .

[0031] A positioning cone 13 is coaxially provided between the main body 4 and the outlet portion 5 , and a positioning surface that matches the side surface of the positioning cone 13 is provided on the lower end surface of the guide sleeve.

[0032] Example 2: Combination Figures 3 and 4 It can be seen that this embodiment is based on the modification of the structure in embodiment 1, and the modified technical solution is as follows: The outer circumference of the cylindrical portion 6 is provided with multiple layers of ball assemblies along the axial direction. Each layer of ball assemblies includes at least three receiving grooves 9 evenly distributed along the circumference. Each receiving groove 9 contains a spring 10 and a ball 11 that protrudes from the notch of the receiving groove 9 through the spring 10. The protruding portion of the ball 11 forms rolling contact with the inner wall of the sleeve hole 3. The spring 10 is provided with a preload.

[0033] The diameter of the slot opening of the receiving slot 9 is smaller than the diameter of the ball 11 . One end of the spring 10 abuts the bottom of the slot 9 , and the other end abuts the ball 11 , so that the ball 11 partially protrudes from the slot opening of the receiving slot 9 .

[0034] The ball 11 can move along the length of the receiving groove 9. A retaining ring is provided at the opening of the receiving groove 9 to prevent the ball 11 from completely escaping the receiving groove 9. Preferably, the groove depth H1 of the receiving groove 9 is 1.5d (d is the ball diameter), and the groove opening is reduced to 0.8d to prevent the ball 11 from escaping.

[0035] The distance between two adjacent layers of accommodating grooves 9 is smaller than the depth of the sleeve hole 3 .

[0036] Optionally, the ball assembly can be arranged on the guide bar 8 , and the number of each layer of accommodating grooves 9 is arranged in a one-to-one correspondence with the number of guide bars 8 , and the balls 11 protrude from the guide surface and form rolling contact with the inner wall of the sleeve hole 3 .

[0037] The steps of using the battery lead terminal centering assembly structure of the present invention are as follows: S1. The guide sleeve jack 12 and the pole 1 through the coaxial portion 5 plug, so that the outer diameter of the cylindrical portion of the guide sleeve 6 and the outer diameter of the main body portion 4 consistent, and the frustum portion 7 upward; S2. The main body portion 4 of the pole 1 and the cylindrical portion 6 of the guide sleeve are inserted into the lead sleeve 2 of the sleeve hole 3, and the guide sleeve guides the pole 1 to be aligned centrally; S3. Remove the guide sleeve so that the protruding portion 5 is completely exposed outside the sleeve hole 3.

[0038] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are similarly included in the patent protection scope of the present invention.

Claims

1. A battery lead pole centering assembly structure, comprising a pole (1) and a lead sleeve (2), wherein the top end of the pole (1) passes through a sleeve hole (3) of the lead sleeve (2), and is characterized in that: The pole (1) comprises a cylindrical main body (4) with a clearance fit with the sleeve hole (3), and a through-hole (5) coaxially arranged at the upper end of the main body (4) and having a diameter smaller than that of the main body (4), a guide sleeve coaxially and detachably connected to the through-hole (5), and the guide sleeve comprises a cylindrical portion (6) having an outer diameter consistent with the outer diameter of the main body (4), and a frustum portion (7) arranged at the upper end of the cylindrical portion (6).

2. The battery lead terminal centering assembly structure according to claim 1, characterized in that: A plurality of vertical guide bars (8) are arranged at intervals along the circumferential direction on the outer circumference of the cylindrical portion (6), and the outer circumferential surfaces of the guide bars (8) are arranged cocircularly to form a guide surface, and the guide surface is clearance-matched with the inner wall of the sleeve hole (3).

3. A battery lead terminal centering assembly structure according to claim 1 or 2, characterized in that: The outer circumference of the cylindrical portion (6) is provided with a multi-layer ball assembly along the axial direction, and each layer of the ball assembly includes at least three receiving grooves (9) evenly distributed along the circumference, and each receiving groove (9) is provided with a spring (10) and a ball (11) protruding from the notch of the receiving groove (9) through the spring (10), and the protruding portion of the ball (11) forms a rolling contact with the inner wall of the sleeve hole (3).

4. The battery lead terminal centering assembly structure according to claim 3, characterized in that: The diameter of the slot opening of the receiving slot (9) is smaller than the diameter of the ball (11), one end of the spring (10) abuts against the bottom of the receiving slot (9), and the other end abuts against the ball (11), so that the ball (11) partially protrudes from the slot opening of the receiving slot (9).

5. The battery lead terminal centering assembly structure according to claim 3, characterized in that: The ball assembly is arranged on the guide bar (8), and the number of each layer of accommodating grooves (9) is arranged in a one-to-one correspondence with the number of guide bars (8). The balls (11) protrude from the guide surface and form rolling contact with the inner wall of the sleeve hole (3).

6. The battery lead terminal centering assembly structure according to claim 3, characterized in that: The distance between two adjacent layers of accommodating grooves (9) is smaller than the depth of the sleeve hole (3).

7. The battery lead terminal centering assembly structure according to claim 2, characterized in that: The matching clearance between the guide surface and the inner wall of the sleeve hole (3) is less than 0.5 mm.

8. The battery lead terminal centering assembly structure according to claim 1, characterized in that: A socket (12) having a diameter matching that of the outlet portion (5) is provided in the guide sleeve, and the guide sleeve is slidably connected to the outlet portion (5) via the socket (12).

9. A battery lead terminal centering assembly structure according to claim 1 or 8, characterized in that: A positioning cone (13) is coaxially provided between the main body (4) and the outlet portion (5), and a positioning surface that matches the side surface of the positioning cone (13) is provided on the lower end surface of the guide sleeve.

10. A method for using the battery lead terminal centering assembly structure according to any one of claims 1 to 9, characterized in that: The steps of this method are as follows: S1. Coaxially connect the guide sleeve's jack (12) to the exit portion (5) of the pole (1), ensuring that the outer diameter of the guide sleeve's cylindrical portion (6) is consistent with the outer diameter of the main body (4), and that the frustum (7) faces upward. S2. Insert the main body (4) of the pole (1) and the cylindrical portion (6) of the guide sleeve into the sleeve hole (3) of the lead sleeve (2), and guide the pole (1) to the center through the guide sleeve; S3. Remove the guide sleeve so that the protruding portion (5) is completely exposed outside the sleeve hole (3).

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