Anti-loosening copper-plated negative electrode lug

Abstract

The utility model relates to the field of copper-plated negative electrode tabs, and discloses an anti-loosening copper-plated negative electrode tab, which comprises a tab metal belt and an electrode conductor, welding grooves are arranged on two sides of the lower half part of the tab metal belt, sawtooth grooves are arranged at the welding grooves, the tab metal belt is welded and fixed with the electrode conductor through the sawtooth grooves, and the electrode conductor is fixed on the tab metal belt through the sawtooth grooves. The periphery of the upper half part of the tab metal belt is fixedly sleeved with a positioning bracket, and anti-falling sleeves are arranged above and below the positioning bracket. According to the anti-loosening copper-plated negative electrode tab, the sawtooth grooves are formed, the contact area of a welding part is increased through the multiple sets of sawtooth grooves, additional physical grabbing force is provided through the structures of the sawtooth grooves, the firmness and durability of a welding point are ensured, the shape is supported through the positioning support on the upper half portion of the tab metal belt, and the anti-loosening copper-plated negative electrode tab is formed. And the two groups of anti-falling sleeves are sleeved outside the tab metal belt and are respectively supported by the support rods, so that the problem that the tab metal belt is broken and loosened outside the extension part of the battery pack due to the pulling of the metal connecting sheet and the outside is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to copper plating negative pole lug technical field, concretely is a kind of copper plating negative pole lug of anti-loosening. BACKGROUND

[0002] Pole lug is the key component in the internal structure of battery, it connects the electrode inside battery and external circuit, and is the main channel of current transmission. Pole lug is usually made of high-conductivity material to ensure that the current inside battery can be transmitted efficiently and stably. In lithium battery, negative pole lug is mostly made of copper plating material because copper has excellent conductivity.

[0003] Because battery will be subjected to mechanical vibration, thermal expansion and contraction and external stress such as pulling during use, these stress effects can cause the external fracture and loosening of pole lug metal strip at battery package extension, and pole lug loosening not only increases the contact resistance inside battery, affects the discharge performance of battery, but also can cause poor contact inside battery, and cause local overheating, and even cause battery short circuit or failure in serious cases.

[0004] Therefore, a copper plating negative pole lug is needed to prevent loosening to solve the above technical defects. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a copper plating negative pole lug to prevent loosening to solve the problem of external fracture and loosening of pole lug metal strip at battery package extension in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a copper plating negative pole lug to prevent loosening, including pole lug metal strip and electrode conductor, the lower half of pole lug metal strip is provided with welding groove on both sides, the sawtooth groove is opened at welding groove, the pole lug metal strip is welded and fixed with electrode conductor through sawtooth groove, the upper half of pole lug metal strip is fixed with positioning support outside periphery, the positioning support is provided with anti-loosening sleeve above and below.

[0007] Preferably, the anti-loosening sleeve is a rectangular sleeve that penetrates from top to bottom, and the anti-loosening sleeve is made of insulating plastic material.

[0008] Preferably, the anti-loosening sleeve is respectively sleeved with the outer part of the pole lug metal strip, and a support rod is welded between the anti-loosening sleeve and the positioning support around the anti-loosening sleeve, and a welding point is arranged at the connection between the support rod and the positioning support.

[0009] Preferably, the support rod is provided with four groups around the anti-loosening sleeve, and the support rod is arranged obliquely.

[0010] Preferably, the support rod, the anti-loosening sleeve and the positioning support form a right-angled triangle structure.

[0011] Preferably, the positioning support is located outside the battery pack, and the top end of the tab metal belt extends above the battery pack and is welded with a metal connecting sheet.

[0012] Preferably, the tab metal belt comprises a three-layer composite structure, the middle layer of the tab metal belt is a metal conductor, the connecting surface of the tab metal belt and the electrode conductor is coated with an outer plating film, and the outer part of the tab metal belt is coated with a polymer composite coating.

[0013] Preferably, the polymer composite coating is a polyimide coating, the metal conductor adopts a copper-plated foil material, and the outer plating film is a nickel plating film.

[0014] Compared with the prior art, the anti-loosening copper-plated negative tab has the advantages that it avoids breakage and loosening, improves the stability and reliability of the overall structure, reduces the number of components, avoids loosening, improves the surface performance and transmission capacity, and the like.

[0015] (1) The tab metal belt is provided with sawtooth grooves, welding grooves, supporting rods and anti-loosening sleeves, the welding grooves in the lower half of the tab metal belt are provided with multiple sawtooth grooves, which increase the contact area of the welding part, and the structure of the sawtooth grooves provides additional physical gripping force to ensure the firmness and durability of the welding point, the upper half of the tab metal belt is supported by the positioning support, and the two anti-loosening sleeves are sleeved outside the tab metal belt and are supported by the supporting rods, which can prevent the tab metal belt from breaking and loosening outside the extension of the battery pack due to the pulling of the metal connecting sheet and the outside, thereby improving the stability and reliability of the overall structure.

[0016] (2) The tab metal belt is fixed by the sleeving of the upper and lower anti-loosening sleeves, forming a symmetrical multiple triangular support structure, the positioning support is quickly pressed onto the tab metal belt during assembly, and welding is performed at the welding points without the need for screws or other fixing parts, thereby reducing the number of components, reducing production costs, and avoiding the loosening of the structure caused by the loosening of screws or the failure of other fixing parts in traditional designs, and even in long-term use or in a high-vibration environment, the stability of the connection can be maintained.

[0017] (3) The tab metal belt comprises a three-layer composite structure, the metal conductor is located in the middle layer of the tab metal belt and has high conductivity, the polymer composite coating is located outside the tab metal belt, the outer plating film is coated on the connecting surface of the tab metal belt and the electrode conductor, the high-conductivity metal conductor and the polymer composite coating improve the surface performance and transmission capacity, and the outer plating film enhances the wear resistance and oxidation resistance of the contact surface, reduces the contact resistance, and improves the stability of the electrical connection. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the front view sectional structure schematic diagram of the utility model;

[0019] Figure 2 It is the overhead structure schematic diagram of the utility model's support pole;

[0020] Figure 3 It is the utility model's Figure 1 It is the local section enlarged structure schematic diagram of A place in the middle;

[0021] Figure 4 It is the tab metal belt layered structure schematic diagram of the utility model.

[0022] In the drawing: 1, metal connecting piece; 2, anti-drop sleeve; 3, support pole; 4, welding spot; 5, positioning support; 6, tab metal belt; 7, electrode conductor; 8, sawtooth groove; 9, welding groove; 601, macromolecular composite coating; 602, metal conductor; 603, outer plating film. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] Embodiment 1: please refer to Figures 1-4 A copper-plated negative tab capable of preventing loosening includes a tab metal belt 6 and an electrode conductor 7. Welding grooves 9 are arranged on both sides of the lower half of the tab metal belt 6. Sawtooth grooves 8 are arranged at the welding grooves 9. The tab metal belt 6 is welded and fixed with the electrode conductor 7 through the sawtooth grooves 8. Positioning supports 5 are fixed on the outer periphery of the upper half of the tab metal belt 6. Anti-drop sleeves 2 are arranged above and below the positioning supports 5. The anti-drop sleeves 2 are rectangular sleeves penetrating from top to bottom. The anti-drop sleeves 2 are made of insulating plastic material. The positioning supports 5 are located outside the battery pack. The top end of the tab metal belt 6 extends above the battery pack and is welded with a metal connecting piece 1.

[0025] Specifically, as Figure 1 , Figure 2 and Figure 3As shown, the lug metal strip 6 is provided with multiple groups of sawtooth grooves 8 at the welding groove 9 of the lower half during welding, which increases the contact area of the welding site, and the structure of the sawtooth grooves 8 provides additional physical gripping force to ensure the firmness and durability of the welding point. In the upper half of the lug metal strip 6, the two groups of anti-disengagement sleeves 2 are sleeved outside the lug metal strip 6 and are supported by the support rods 3, which can prevent the lug metal strip 6 from being broken and disengaged outside the battery pack extension due to the pulling of the metal connecting piece 1 and the outside.

[0026] In the embodiment 2, the anti-disengagement sleeves 2 are respectively sleeved outside the lug metal strip 6, and the support rods 3 are welded between the periphery of the anti-disengagement sleeves 2 and the positioning supports 5. The support rods 3 are provided with welding points 4 at the connection with the positioning supports 5, and four groups of support rods 3 are arranged around the anti-disengagement sleeves 2. The support rods 3 are inclined, and the support rods 3, the anti-disengagement sleeves 2, and the positioning supports 5 form a right triangle structure.

[0027] Specifically, as shown in Figure 1 and Figure 2 , the lug metal strip 6 is fixed by the sleeving of the upper and lower two groups of anti-disengagement sleeves 2, forming a symmetrical multi-group triangular support structure. During assembly, the positioning supports 5 are quickly pressed onto the lug metal strip 6, and then welded at the welding points 4, without the need for screws or other fixing parts, reducing the number of components and production costs, and avoiding the problem of structural loosening caused by screw loosening or failure of other fixing parts in traditional designs.

[0028] In the embodiment 3, the lug metal strip 6 comprises a three-layer composite structure. The middle layer of the lug metal strip 6 is a metal conductor 602. The connection surface between the lug metal strip 6 and the electrode conductor 7 is coated with an outer plating film 603. The outer surface of the lug metal strip 6 is coated with a high-molecular composite coating 601. The high-molecular composite coating 601 is a polyimide coating. The metal conductor 602 is made of copper-plated foil material. The outer plating film 603 is a nickel plating film.

[0029] Specifically, as shown in Figure 1 and Figure 4 , the lug metal strip 6 comprises a three-layer composite structure. The metal conductor 602 is located in the middle layer of the lug metal strip 6 and has high conductivity. The high-molecular composite coating 601 is located on the outer surface of the lug metal strip 6, allowing efficient transmission of current. The outer plating film 603 is coated on the connection surface between the lug metal strip 6 and the electrode conductor 7, enhancing the wear resistance and oxidation resistance of the contact surface, reducing the contact resistance, and improving the stability of the electrical connection. The high-molecular composite coating 601 covers the outer surface of the lug metal strip 6 and is made of corrosion-resistant material, further improving the surface properties.

[0030] Working principle: the lug metal belt 6 is fixed through the sleeve connection of the upper and lower two groups of anti-off sleeves 2, forming a symmetrical multi-group triangular support structure, in assembly, the positioning support 5 is quickly pressed to the lug metal belt 6, then welding is added at the welding point 4, without screws and other fixing parts, reducing the number of components, when the lug metal belt 6 is welded, a plurality of sawtooth grooves 8 are arranged at the welding groove 9 of the lower half of the lug metal belt 6, increasing the contact area of the welding part, and the structure of the sawtooth groove 8 provides additional physical gripping force, ensuring the firmness and durability of the welding point, on the upper half of the lug metal belt 6, the positioning support 5 supports the shape, and the two groups of anti-off sleeves 2 are sleeved outside the lug metal belt 6 and are supported by the support rod 3 respectively, which can avoid the external fracture and loosening of the lug metal belt 6 at the battery pack extension due to the pulling of the metal connecting piece 1 and the outside, the lug metal belt 6 comprises a three-layer composite structure, the metal conductor 602 is located in the middle layer of the lug metal belt 6 and has high conductivity, the high polymer composite coating 601 is located outside the lug metal belt 6, so that the current can be efficiently transmitted, the outer plating film 603 is coated on the connecting surface of the lug metal belt 6 and the electrode conductor 7, which enhances the wear resistance and oxidation resistance of the contact surface, reduces the contact resistance and improves the stability of the electrical connection, and the high polymer composite coating 601 covers the outside of the lug metal belt 6 and is made of corrosion-resistant material, further improving the surface performance.

[0031] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as exemplary and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and range of equivalent elements of the claims are intended to be embraced in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. A copper-plated negative electrode tab with anti-loosening, comprising a tab metal strip (6) and an electrode conductor (7), characterized in that: The lower half of the lug metal band (6) is provided with a welding groove (9) on both sides, a sawtooth groove (8) is opened at the welding groove (9), the lug metal band (6) is welded and fixed with the electrode conductor (7) through the sawtooth groove (8), the upper half of the lug metal band (6) is fixedly sleeved with a positioning support (5) on the outer periphery, and the positioning support (5) is provided with an anti-dropping sleeve (2) above and below.

2. The anti-loose copper-plated negative tab according to claim 1, characterized in that: The anti-dropping sleeve (2) is a rectangular sleeve penetrating from top to bottom, and is made of insulating plastic material.

3. The anti-loose copper-plated negative tab according to claim 1, wherein: The anti-dropping sleeve (2) is respectively sleeved with the outer part of the lug metal band (6), and a supporting rod (3) is welded between the anti-dropping sleeve (2) and the positioning support (5) around the anti-dropping sleeve (2).

4. The anti-loose copper-plated negative tab according to claim 3, characterized in that: The supporting rod (3) is provided with four groups around the anti-dropping sleeve (2), and the supporting rod (3) is arranged obliquely.

5. The anti-loose copper-plated negative tab according to claim 3, wherein: The supporting rod (3), the anti-dropping sleeve (2) and the positioning support (5) constitute a right-angled triangle structure.

6. The anti-loose copper-plated negative tab according to claim 1, wherein: The positioning support (5) is located outside the battery pack, and the top end of the lug metal band (6) extends above the battery pack and is welded with a metal connecting piece (1).

7. The anti-loose copper-plated negative tab according to claim 1, wherein: The lug metal band (6) comprises a three-layer composite structure, the middle layer of the lug metal band (6) is a metal conductor (602), the connecting surface of the lug metal band (6) and the electrode conductor (7) is coated with an outer plating film (603), and the outer part of the lug metal band (6) is coated with a high polymer composite coating (601).

8. The anti-loose copper-plated negative tab according to claim 7, characterized in that: The high polymer composite coating (601) is a polyimide coating, the metal conductor (602) is made of copper foil material, and the outer plating film (603) is a nickel plating film.

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