Terminal post for large lead-acid storage battery

Abstract

The utility model relates to a terminal post for a large lead-acid storage battery, belongs to the technical field of lead-acid storage batteries, and solves the problem of poor connection reliability of the terminal post of the large lead-acid storage battery in the prior art. The lead-tin pole comprises a copper core and a lead-tin pole, the copper core comprises an exposed section, an embedded section and an axial limiting block, the diameter of the embedded section is smaller than that of the exposed section, and the axial limiting block protrudes out of the embedded section in the circumferential direction; the lead-tin pole comprises a pole body, the end part of the pole body is recessed inwards to form a cavity, the bottom of the cavity is provided with an axial clamping groove, the embedding section is matched with the cavity, and the axial limiting block is matched with the axial clamping groove to limit the axial movement of the copper core relative to the lead-tin pole. According to the utility model, the axial limiting block is arranged at the end part of the embedding section of the copper core and the axial clamping groove is arranged at the bottom of the cavity of the lead-tin pole, and the axial limiting block and the axial clamping groove are matched with each other, so that the axial movement of the copper core relative to the lead-tin pole is limited, and the connection reliability of the copper core and the lead-tin pole is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lead -acid battery technical field especially relates to a big -size lead -acid battery is with end pole. BACKGROUND

[0002] Because the current that passes through in the working process is larger, unlike the small capacity battery with silver plated copper wiring terminal as output interface, the big -size lead -acid battery (the big -size lead -acid battery in the utility model refers to the capacity in 60Ah above's battery) often with big size copper -lead inlay spare (end pole) as positive and negative wiring column, but because copper and lead's elastic modulus, thermal expansion coefficient and other mechanical properties difference is bigger, lead to copper -lead inlay spare under the action of temperature change or mechanical stress, interface easy produce crack or delamination. Meanwhile because copper and lead's mutual solubility is poor, it is difficult to form metallurgical combination, leading to interface combination mainly relies on mechanical inlay or diffusion layer, and the combination strength is lower. In addition, the melting point of lead is lower (327.5 DEG C), under high temperature or large current condition, end pole is easy to soften or melt, leading to structural failure. Copper -lead interface thermal resistance is higher, possibly causes local overheating, accelerates material deterioration.

[0003] And in the end pole design of big -size lead -acid battery, the connection reliability, heat dissipation, mechanical strength and the like when copper, lead inlay are all vital performance requirements, and the existing end pole cannot satisfy the demand of various complex use scenes. UTILITY MODEL CONTENTS

[0004] In view of the above -mentioned analysis, the utility model embodiment aims at providing a kind of end pole for big -size lead -acid battery to solve the problem of poor connection reliability of the end pole of big -size lead -acid battery.

[0005] In one aspect, the utility model provides a kind of end pole for big -size lead -acid battery, including copper core and lead tin pole;The copper core includes sequentially connected exposed section, inlay section and axial limit block, the diameter of the inlay section is less than the diameter of the exposed section, and the axial limit block is protruding from the inlay section;The lead tin pole includes column body, the end of the column body is recessed with cavity, the bottom of the cavity is provided with axial clamping groove, the inlay section is matched with the cavity, and the axial limit block is matched with the axial clamping groove to limit the axial movement of the copper core relative to the lead tin pole.

[0006] Further, limit pin is provided at the end of the exposed section towards the inlay section, and the limit pin protrudes in the direction of the axial limit block along the axial direction;The end of the column body of the lead tin pole is provided with circumferential clamping groove, and the limit pin is matched with the circumferential clamping groove to limit the rotation of the copper core relative to the lead tin pole.

[0007] Further, a circumferential ring groove is arranged on the exposed section, and the circumferential ring groove is arranged adjacent to the limiting pin.

[0008] Further, a plurality of heat dissipation grooves are arranged on the outer circumferential surface of the column body of the lead-tin pole.

[0009] Further, the heat dissipation grooves are arranged in a plurality of.

[0010] Further, the plurality of heat dissipation grooves are arranged in parallel in a vertical direction, and the discontinuous positions of the plurality of heat dissipation grooves are not on the same vertical line.

[0011] Further, the discontinuous positions of the plurality of heat dissipation grooves are uniformly distributed along the circumference of the column body.

[0012] Further, the depth of the heat dissipation grooves is 0.8-1mm, and the groove spacing is 5-10mm.

[0013] Further, the large lead-acid storage battery refers to a storage battery with a capacity of 60Ah or more.

[0014] Further, the lead-tin pole is formed by casting a lead-tin alloy with a tin content of 0.63-0.66%.

[0015] Compared with the prior art, the present application can achieve at least one of the following beneficial effects:

[0016] (1) The present application sets an axial limiting block at the end of the embedded section of the copper core and an axial clamping groove at the bottom of the cavity of the lead-tin pole, and the two are matched to limit the axial movement of the copper core relative to the lead-tin pole, improving the reliability of the connection between the two.

[0017] (2) The present application sets a limiting pin on the copper core and a circumferential clamping groove on the lead-tin pole, and the two are matched to limit the rotation of the copper core relative to the lead-tin pole, further improving the reliability of the connection between the two.

[0018] (3) The present application sets a heat dissipation groove on the outer circumferential surface of the lead-tin pole, increases the contact area with the outside, and thus improves the heat dissipation performance, and the risk of deformation or sliding is reduced by the limiting of the cured rubber block after the rubber sealing.

[0019] (4) The present application uses a lead-tin alloy with a tin content of 0.63-0.66% to form the lead-tin pole by casting, which improves the mechanical strength of the pole compared with the conventional lead body pole.

[0020] The technical solutions of the above embodiments can be combined with each other to realize more optional combination solutions. Other features and advantages of the present application will be described in the following description, and some advantages can be apparent from the description or can be understood by implementing the present application. The purposes and other advantages of the present application can be realized and obtained from the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings are only for the purpose of illustrating specific embodiments and are not considered as limiting the present application, and in the whole drawings, the same reference signs represent the same parts.

[0022] Figure 1 Structure diagram of the end pole for the large lead-acid storage battery of the present application;

[0023] Figure 2 Structure diagram of the copper core of the end pole for the large lead-acid storage battery of the present application;

[0024] Figure 3 Longitudinal sectional view of the copper core of the end pole for the large lead-acid storage battery of the present application;

[0025] Figure 4 Structure diagram of the lead-tin pole of the end pole for the large lead-acid storage battery of the present application;

[0026] Figure 5 Longitudinal sectional view of the lead-tin pole of the end pole for the large lead-acid storage battery of the present application.

[0027] Reference signs:

[0028] 10-copper core; 11-threaded hole; 12-limiting pin; 13-axial limiting block; 20-lead-tin pole; 21-pole body; 22-radiating groove; 23-base; 24-cavity; 25-axial clamping groove; 26-circumferential clamping groove; 221-first radiating groove; 222-second radiating groove; 223-third radiating groove. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present application will be described in detail below with reference to the drawings, wherein the drawings form a part of the present application and are used to explain the principles of the present application together with the embodiments of the present application, and are not used to limit the scope of the present application.

[0030] Embodiment 1

[0031] One specific embodiment of the present application, as shown in Figure 1 , discloses an end pole for a large lead-acid storage battery.

[0032] AsFigure 1 The end pole post comprises a copper core 10 and a lead-tin pole post 20, wherein the copper core 10 is partially embedded in the lead-tin pole post 20 and partially protrudes from the end of the lead-tin pole post 20. The copper core 10 serves as the core part of the end pole post and is connected with external conductive components (such as cables, terminals) through threads, while internally connected with the busbar of the battery plate group through welding or pressing. The lead-tin pole post 20 is directly welded with the positive plate group inside the battery and serves as the physical and electrical connection point of the pole post and the internal circuit of the battery. In addition, the lead-tin pole post 20 serves as the outer material of the end pole post, providing corrosion resistance and mechanical strength, while cooperating with the sealant of the battery cover to prevent electrolyte leakage.

[0033] The structure of the copper core 10 is shown in Figure 2 , Figure 3 The copper core 10 comprises a bare section, an embedded section and an axial limiting block 13 connected in sequence. The diameter of the embedded section is smaller than that of the bare section, and the axial limiting block 13 protrudes circumferentially from the embedded section. The embedded section and the axial limiting block 13 are embedded in the lead-tin pole post 20 and tightly combined with the lead-tin pole post 20 to form a whole. The bare section protrudes from the lead-tin pole post 20 and is used to connect with external conductive components. The end face of the bare section is internally provided with a threaded hole 11 for connecting with external conductive components.

[0034] A limiting pin 12 is arranged at the end of the bare section of the copper core 10 facing the embedded section. The limiting pin 12 extends in the axial direction and protrudes towards the axial limiting block 13. Multiple limiting pins 12 can be arranged and uniformly distributed along the circumferential direction of the copper core 10.

[0035] A circumferential ring groove is further arranged on the bare section of the copper core 10, which is arranged adjacent to the limiting pin 12. The circumferential ring groove constitutes the neck part of the copper core 10, which can reduce weight, save raw materials and reduce cost without affecting the overall performance.

[0036] Referring to Figure 4 , Figure 5 The lead-tin pole post 20 comprises a post body 21 and a base 23, which are integrally formed. The base 23 is used to be welded with the busbar of the battery, and the post body 21 is used to be embedded with the copper core 10.

[0037] Specifically, the end of the post body 21 is recessed inwardly to form a cavity 24, and the bottom of the cavity 24 is provided with an axial clamping groove 25 protruding outwardly in the circumferential direction relative to the cavity 24. The embedded section of the copper core 10 is matched with the cavity 24 of the lead-tin pole post 20, and the axial limiting block 13 of the copper core 10 is matched with the axial clamping groove 25 of the lead-tin pole post 20 to limit the axial movement of the copper core 10 relative to the lead-tin pole post 20.

[0038] The end of the column body 21 of the lead-tin pole 20 is provided with a circumferential clamping groove 26, and the limiting pin 12 of the copper core 10 is matched with the circumferential clamping groove 26 to limit the rotation of the copper core 10 relative to the lead-tin pole 20, and the relative displacement in the inner end pole column can be prevented to cause poor contact.

[0039] Preferably, the outer circumferential surface of the column body 21 of the lead-tin pole 20 is provided with a heat dissipation groove 22. The heat dissipation groove 22 can increase the contact area with the outside, thereby improving the heat dissipation performance, and the cured glue block after the glue sealing can limit the risk of deformation or sliding.

[0040] The heat dissipation groove 22 is a discontinuous groove extending in the circumferential direction. That is, the projection of the heat dissipation groove 22 in the horizontal plane is C-shaped. Through this arrangement, on the one hand, the strength of the column body 21 can be avoided to be reduced, and on the other hand, the circumferential friction between the column body 21 and the glue block after the glue sealing can be enhanced to avoid relative sliding.

[0041] The heat dissipation groove 22 is provided with a plurality of heat dissipation grooves 22 which are distributed in parallel in the vertical direction, and the discontinuous positions of the plurality of heat dissipation grooves 22 are not on the same vertical line. In the embodiment, the heat dissipation groove 22 is provided with three heat dissipation grooves 22, which are a first heat dissipation groove 221, a second heat dissipation groove 222 and a third heat dissipation groove 223. The discontinuous positions of the three heat dissipation grooves 22 are uniformly distributed along the circumferential direction of the column body 21. Through this arrangement, the heat dissipation area can be maximized to improve the heat dissipation performance, while the strength of the column body 21 is not affected.

[0042] Further, in order to avoid reducing the strength of the column body 21, the groove depth of the heat dissipation groove 22 is 0.8-1mm, and the groove spacing is 5-10mm.

[0043] The lead-tin pole 20 is formed by casting a lead-tin alloy with a tin content of 0.63%-0.66% by mass, which has higher mechanical strength than the lead body pole in the prior art.

[0044] Compared with the prior art, the end pole for large lead-acid storage battery provided in the embodiment is provided with an axial limiting block at the end of the embedded section of the copper core and an axial clamping groove at the bottom of the cavity of the lead-tin pole, and the two are matched to limit the axial movement of the copper core relative to the lead-tin pole, thereby improving the reliability of the connection between the two.

[0045] The above describes only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application.

Claims

1. A terminal post for a large lead-acid storage battery, characterized by comprising: The application relates to a large-sized lead-acid storage battery, which comprises a copper core and a lead-tin pole; the copper core comprises a bare section, a fitting section and an axial limiting block which are sequentially connected; the diameter of the fitting section is smaller than that of the bare section; the axial limiting block protrudes from the fitting section in the circumferential direction; the lead-tin pole comprises a pole body, the end of the pole body is concave and has a cavity, the bottom of the cavity is provided with an axial clamping groove, the fitting section is matched with the cavity, and the axial limiting block is matched with the axial clamping groove to limit the axial movement of the copper core relative to the lead-tin pole.

2. The terminal post for large lead-acid storage batteries according to claim 1, characterized in that A limiting pin is arranged at the end of the bare section which is close to the fitting section, the limiting pin protrudes in the axial direction of the axial limiting block; the end of the pole body of the lead-tin pole is provided with a circumferential clamping groove, and the limiting pin is matched with the circumferential clamping groove to limit the rotation of the copper core relative to the lead-tin pole.

3. The terminal post for large lead-acid storage batteries according to claim 2, characterized in that A circumferential ring groove is arranged on the bare section and is adjacent to the limiting pin.

4. The terminal post for large lead-acid storage batteries according to claim 1, characterized in that A heat dissipation groove is arranged on the outer circumferential surface of the pole body of the lead-tin pole, and the heat dissipation groove is a discontinuous groove which extends in the circumferential direction.

5. The terminal post for large lead-acid storage batteries according to claim 4, characterized in that The heat dissipation groove is provided with a plurality of heat dissipation grooves.

6. The terminal post for large lead-acid storage batteries according to claim 5, characterized in that The plurality of heat dissipation grooves are distributed in parallel in the vertical direction, and the discontinuous positions of the plurality of heat dissipation grooves are not on the same vertical line.

7. The terminal post for large lead-acid storage batteries according to claim 6, characterized in that The discontinuous positions of the plurality of heat dissipation grooves are uniformly distributed along the circumferential direction of the pole body.

8. A terminal post for large lead-acid storage batteries according to any one of claims 4 to 7, characterised in that The groove depth of the heat dissipation groove is 0.8-1mm, and the groove spacing is 5-10mm.

9. The terminal post for large lead-acid storage batteries according to claim 1, characterized in that The large-sized lead-acid storage battery refers to a storage battery with a capacity of more than 60Ah.

10. The terminal post for large lead-acid storage batteries according to claim 1, characterized in that The lead-tin pole is made of lead-tin alloy with a tin content of 0.63%-0.66%.

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