Battery terminal column and rechargeable battery

Abstract

The utility model relates to the technical field of rechargeable batteries, and in particular to a battery terminal pole and a rechargeable battery. The battery terminal pole comprises: a fitting and a terminal; the terminal is provided with a cylindrical concave portion, the fitting penetrates into the interior of the cylindrical concave portion and is die-casted to the cylindrical concave portion; the outer wall of the cylindrical concave portion is provided with a cylindrical groove, and the axis of the cylindrical groove is arranged parallel to the axis of the cylindrical concave portion. The utility model improves the torsion resistance by providing a groove at the fitting connection portion using a prismatic connection portion in the fitting and at the bottom of the fitting; at the same time, an annular groove is provided on the outer side wall of the cylindrical concave portion to improve the acid creep resistance, thereby solving the problems of torsion resistance drop difference, acid creep corrosion resistance, and short service life of the pole in the rechargeable battery in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of rechargeable batteries, in particular to a battery terminal pole and a rechargeable battery. Background Art

[0002] Lead-acid batteries have good charging and discharging performance, are safe and stable, and are cheap. They are currently widely used in electric bicycles, automobiles, USP, energy storage and other fields. They are mainly composed of positive plates, negative plates, electrolytes, separators, electrolytic cells, battery covers, poles, etc. The poles are used to connect the internal circuit of the battery with the external circuit. However, the existing lead-acid batteries still have certain defects. Many of them fail due to reasons such as the end pole nesting copper core falling off due to torsion, pole climbing acid corrosion, etc., and do not reach the expected design life.

[0003] The market is in urgent need of a lead-acid battery with a sturdy structure, resistance to torsion shedding and resistance to acid corrosion. Utility Model Content

[0004] In view of the above analysis, the utility model aims to provide a battery terminal pole and a rechargeable battery, which solves at least one of the problems of rechargeable batteries in the prior art, such as poor resistance to torsional drop, poor resistance to acid corrosion, and short service life.

[0005] The purpose of this utility model is mainly achieved through the following technical solutions:

[0006] A battery terminal pole comprises: a fitting and a terminal;

[0007] The terminal is provided with a cylindrical concave portion, and the engaging piece penetrates into the interior of the cylindrical concave portion and is die-casted and connected to the cylindrical concave portion;

[0008] The outer wall of the cylindrical concave portion is provided with a cylindrical groove, and the axis of the cylindrical groove is arranged parallel to the axis of the cylindrical concave portion.

[0009] Preferably, there are a plurality of cylindrical grooves, which are symmetrically arranged relative to the axis center of the cylindrical concave portion.

[0010] Preferably, the terminal is further provided with a screw connection portion, which is a trapezoidal block, wherein one side of the short side of the trapezoidal block is connected to the bottom outer side wall of the cylindrical concave portion, and one side of the long side is connected to the internal busbar of the battery.

[0011] Preferably, the side surface of the cylindrical concave portion penetrates into the inner side of the short side of the trapezoidal block, and the cylindrical concave portion and the trapezoidal block are connected by an arc surface.

[0012] Preferably, the outer side wall of the cylindrical concave portion is further provided with an annular groove arranged perpendicular to the cylindrical groove.

[0013] Preferably, the engagement comprises a prismatic connection portion, the prismatic connection portion penetrates into the interior of the cylindrical concave portion and is matched and connected with the cylindrical concave portion;

[0014] The prismatic connection portion includes a plurality of side surfaces, and the angle between adjacent side surfaces is not 0°.

[0015] Preferably, the engaging member further comprises an engaging connecting portion, and the engaging connecting portion is arranged at one end of the prismatic connecting portion that penetrates into the cylindrical concave portion.

[0016] Preferably, a first groove is provided at the end of the engaging connection portion.

[0017] Preferably, there are two first grooves, which are interconnected and have an angle of 90°.

[0018] A rechargeable battery, characterized in that it comprises the above-mentioned battery terminal pole, battery unit, battery casing and necessary busbar structure;

[0019] The battery terminal pole is fixed to the battery housing and communicates with the battery unit through a busbar structure;

[0020] There are at least two battery terminal poles, which are respectively connected to the positive electrode area and the negative electrode area of ​​the battery unit.

[0021] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0022] (1) The side of the ribbed connection part in the battery terminal pole fitting of the utility model can generate a reverse resistance torque. Because the angle between the adjacent side faces of the ribbed connection part of the utility model is not 0°, the rotation of the ribbed connection part and the fitting relative to the cylindrical concave part and the terminal is avoided, thereby avoiding damage to the pole parts and loss of the pole conduction performance caused by the fitting and the terminal peeling. Compared with the cylindrical connection part in the prior art, when the fitting and the terminal are subjected to external force to rotate relative to each other, the ribbed connection part can provide a greater resistance torque, thereby avoiding torsional damage.

[0023] (2) The battery terminal pole of the utility model is provided with a cylindrical groove on the outer wall of the cylindrical concave portion. When the cylindrical concave portion tends to rotate around its axis, the sealant in the cylindrical groove can generate a reverse resistance torque, thereby preventing the cylindrical concave portion from rotating relative to the sealant and the battery casing, thereby avoiding damage to the battery caused by peeling of the sealant and the terminal and sealing failure.

[0024] (3) The screw connection part in the battery terminal pole of the utility model can bridge the internal busbar area of ​​the battery and the cylindrical concave part. The design of the trapezoidal block can save the use of the material of the screw connection part without increasing the current transmission voltage drop; the side surface of the cylindrical concave part and the inner side of the short side of the trapezoidal block of the screw connection part are connected by an arc surface, so that the electrical connection between the two is more uniform, reducing local resistance and loss.

[0025] (4) The outer wall of the cylindrical concave portion of the utility model is also provided with an annular groove arranged perpendicular to the cylindrical groove, which increases the acid creeping distance along the interface between the sealant and the outer wall of the cylindrical concave portion, thereby delaying the time of complete acid creeping failure and improving the ability to resist acid creeping corrosion.

[0026] Other features and advantages of the utility model will be described in the following description, and some advantages may become apparent from the description, or may be understood by implementing the utility model. The purpose and other advantages of the utility model may be realized and obtained through the contents particularly pointed out in the embodiments of the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 : Front view of the battery terminal.

[0028] Figure 2 : Side view of the battery terminal.

[0029] Figure 3 : Top view of the battery terminal.

[0030] Figure 4 : Schematic diagram of the structure of the fitting.

[0031] Figure 5 : Figure 2 Section view of the middle AA plane.

[0032] Reference numerals:

[0033] Fitting 1;

[0034] Prismatic connection portion 101; engaging connection portion 102; first groove 1021; conductive connection portion 103; threaded connection area 104;

[0035] terminal 2;

[0036] Screw connection portion 201 ; cylindrical concave portion 202 ; cylindrical groove 203 ; annular groove 204 . DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0038] like Figure 1-Figure 4 As shown, on the one hand, the utility model discloses a battery terminal pole, comprising: an insert 1 and a terminal 2;

[0039] The terminal 2 is provided with a cylindrical concave portion 202, and the insert 1 penetrates into the cylindrical concave portion 202 and is die-casted to the cylindrical concave portion 202;

[0040] A cylindrical groove 203 is formed on the outer wall of the cylindrical concave portion 202 , and the axis of the cylindrical groove 203 is arranged parallel to the axis of the cylindrical concave portion 202 .

[0041] During implementation, the fitting 1 is fixedly connected to the cylindrical concave portion 202, the outer wall of the cylindrical concave portion 202 is filled with sealant, and is fixedly connected to the battery casing through the sealant; at the same time, the sealant can play a sealing role to seal the inside and outside of the battery; the cylindrical groove 203 is filled with sealant, and when the cylindrical concave portion 202 tends to rotate around its axis, the sealant in the cylindrical groove 203 can generate a reverse resistance torque, thereby preventing the cylindrical concave portion 202 from rotating relative to the sealant and the battery casing, thereby avoiding battery damage caused by peeling of the sealant and the terminal 2 and sealing failure.

[0042] Preferably, a plurality of cylindrical grooves 203 are provided, which are symmetrically arranged relative to the axis center of the cylindrical concave portion 202 .

[0043] In practice, the centrally symmetrically arranged cylindrical grooves 203 help to generate a uniform resistance torque when the cylindrical concave portion 202 tends to rotate around its axis.

[0044] Preferably, the terminal 2 is further provided with a screw connection portion 201, which is a trapezoidal block, one side of the short side of the trapezoidal block is connected to the bottom outer wall of the cylindrical concave portion 202, and one side of the long side is connected to the internal busbar of the battery.

[0045] Preferably, the side surface of the cylindrical concave portion 202 penetrates into the inner side of the short side of the trapezoidal block, and the two are connected by an arc surface.

[0046] During implementation, the screw connection portion 201 can bridge the internal busbar area of ​​the battery and the cylindrical concave portion 202. The design of the trapezoidal block can save the amount of material used in the screw connection portion without increasing the current transmission voltage drop. The side surface of the cylindrical concave portion 202 and the inner side of the short side of the trapezoidal block of the screw connection portion 201 are connected with an arc surface, making the electrical connection between the two more uniform and reducing local resistance and loss.

[0047] Preferably, the outer side wall of the cylindrical concave portion 202 is further provided with an annular groove 204 arranged perpendicular to the cylindrical groove 203 .

[0048] During implementation, the annular groove 204 increases the acid creeping distance along the interface between the sealant and the outer wall of the cylindrical concave portion 202, thereby delaying the time of complete acid creeping failure and improving the ability to resist acid creeping corrosion.

[0049] Preferably, if Figure 1 , Figure 2 and Figure 5 As shown, the insert 1 includes a prismatic connection portion 101, which penetrates into the cylindrical concave portion 202 and is matched and connected therewith;

[0050] The prismatic connection portion 101 includes a plurality of side surfaces, and the angle between adjacent side surfaces is not 0°.

[0051] During implementation, after the prismatic connecting portion 101 penetrates deep into the cylindrical concave portion 202, when the prismatic connecting portion 101 tends to rotate relative to the cylindrical concave portion 202 around the axis of the cylindrical concave portion 202, the side surface of the prismatic connecting portion 101 can generate a reverse resistance torque, thereby preventing the prismatic connecting portion 101 and the fitting 1 from rotating relative to the cylindrical concave portion 202 and the terminal 2, thereby preventing damage to various parts of the pole and loss of the pole's conductive performance caused by the peeling of the fitting 1 and the terminal 2.

[0052] Compared with the cylindrical connection part in the prior art, the prismatic connection part of the utility model can provide a larger resistance torque when the fitting 1 and the terminal 2 are subjected to external force and try to rotate relative to each other, because the angle between adjacent side surfaces is not 0°, thereby avoiding torsional damage.

[0053] Preferably, the fitting 1 further comprises a fitting connection portion 102, wherein the fitting connection portion 102 is arranged at one end of the prismatic connection portion 101 which penetrates into the cylindrical concave portion 202;

[0054] The end of the interlocking connection portion 102 is provided with a first groove 1021. When the interlocking part 1 and the terminal 2 are die-cast, part of the terminal 2 is embedded in the first groove 1021, further improving the anti-torsion damage capability of the interlocking part 1 and the terminal 2 when the interlocking part 1 and the terminal 2 are subjected to relative rotation by external force.

[0055] Preferably, a plurality of first grooves 1021 are provided.

[0056] More preferably, if Figure 4 As shown, there are two first grooves 1021, which intersect each other at an angle of 90°.

[0057] Preferably, the insert 1 further comprises a conductive connecting portion 103 , which is disposed at one end of the prismatic connecting portion 101 away from the cylindrical concave portion 202 and protrudes from the cylindrical concave portion 202 , and is used to connect to an external power source.

[0058] Specifically, the conductive connection portion 103 is provided with a threaded connection area 104, which can realize a convenient detachable connection with a conductive screw having a matching external thread.

[0059] On the other hand, the utility model discloses a method for forming a battery terminal column, such as Figure 1 , Figure 2 and Figure 5 As shown, the method includes die-casting a prefabricated insert 1 and a lead alloy raw material in a mold to obtain a battery terminal pole in which the insert 1 is partially embedded in the terminal 2.

[0060] Specifically, the insert 1 can be prefabricated by casting, milling and turning.

[0061] During implementation, the die-casting operation can utilize high pressure to make the alloy lead have better fluidity, which can not only fix the connection with the outer surface of the embedded part 1, but even produce a certain diffusion connection, thereby improving the connection strength; at the same time, since the alloy lead has good fluidity, the alloy lead can enter the first groove 1021 at the end of the embedded connection part 102, thereby improving the ability of the embedded part 1 and the terminal 2 to resist torsional damage.

[0062] In a third aspect, the utility model discloses a rechargeable battery, comprising the above-mentioned battery terminal pole, battery unit, battery housing and necessary busbar structure;

[0063] The battery terminal pole is fixed to the battery housing and is connected to the battery unit through the busbar structure;

[0064] There are at least two battery terminal poles, which are respectively connected to the positive electrode area and the negative electrode area of ​​the battery unit.

[0065] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A battery terminal, characterized in that: include: Fittings and terminals; The terminal is provided with a cylindrical concave portion, and the engaging piece penetrates into the interior of the cylindrical concave portion and is die-casted and connected to the cylindrical concave portion; The outer wall of the cylindrical concave portion is provided with a cylindrical groove, and the axis of the cylindrical groove is arranged parallel to the axis of the cylindrical concave portion.

2. A battery terminal according to claim 1, characterized in that: There are a plurality of cylindrical grooves, which are symmetrically arranged relative to the axis center of the cylindrical concave portion.

3. A battery terminal according to claim 1 or 2, characterized in that: The terminal is also provided with a screw connection part, which is a trapezoidal block. One side of the short side of the trapezoidal block is connected to the bottom outer side wall of the cylindrical concave part, and one side of the long side is connected to the internal busbar area of ​​the battery.

4. A battery terminal according to claim 3, characterized in that: The side surface of the cylindrical concave portion penetrates into the inner side of the short side of the trapezoidal block, and the cylindrical concave portion and the trapezoidal block are connected by an arc surface.

5. A battery terminal according to claim 1 or 2, characterized in that: The outer side wall of the cylindrical concave portion is also provided with an annular groove arranged perpendicular to the cylindrical groove.

6. A battery terminal according to claim 1, characterized in that: The insert comprises a prismatic connection portion, the prismatic connection portion penetrates into the cylindrical concave portion and is matched and connected with the cylindrical concave portion; The prismatic connection portion includes a plurality of side surfaces, and the angle between adjacent side surfaces is not 0°.

7. A battery terminal according to claim 6, characterized in that: The engaging member further comprises an engaging connecting portion, which is arranged at one end of the prismatic connecting portion which penetrates into the cylindrical concave portion.

8. A battery terminal according to claim 7, characterized in that: A first groove is provided at the end of the fitting connection portion.

9. A battery terminal according to claim 8, characterized in that: There are two first grooves, which are interconnected and have an angle of 90°.

10. A rechargeable battery, characterized in that: Comprising the battery terminal pole, battery cell, battery casing and necessary busbar structure as described in any one of claims 1 to 9; The battery terminal pole is fixed to the battery housing and communicates with the battery unit through a busbar structure; There are at least two battery terminal poles, which are respectively connected to the positive electrode area and the negative electrode area of ​​the battery unit.

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