Lithium battery tab with high corrosion resistance

Abstract

The utility model relates to the technical field of lithium battery tabs, in particular to a lithium battery tab with strong corrosion resistance, which comprises a loading body, a lithium battery component is arranged in the loading body, and the top of the lithium battery component is fixedly connected with a tab component; the first anti-corrosion grease plate and the second anti-corrosion grease plate are used for protecting the conductor in the tab, harmful gas can be prevented from entering the inner layer of the tab, water can be prevented from invading the tab, the corrosion resistance of the tab is greatly improved, and the tab has excellent self-damping performance, good bending resistance and vibration resistance, and can be used for manufacturing the lithium ion battery. The nickel-based alloy box is used as a loading box of the lithium battery body, so that the oxidation resistance, the corrosion resistance and the high-temperature strength of the loading box are improved, certain physical properties are improved, and the aluminum plastic packaging film is high in air isolation performance, high in oxidation resistance, water resistance, moisture resistance and explosion resistance and high in puncture resistance and tear resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery pole ears, in particular to a lithium battery pole ear with strong corrosion resistance. Background Art

[0002] Tabs are a raw material for lithium-ion polymer battery products, such as mobile phone batteries, Bluetooth batteries, laptop batteries, etc. Batteries are divided into positive and negative poles, and tabs are metal conductors that lead the positive and negative poles out of the battery core. In layman's terms, the tabs at the positive and negative poles of the battery are the contact points during charging and discharging.

[0003] Authorization announcement number CN215527895U discloses a negative pole ear of a lithium battery. The thickness and width of the middle pole ear of the patented technology are smaller than the thickness and width of the upper pole ear or the lower pole ear. When the current passing through the middle pole ear is too large, the middle pole ear will melt and disconnect, playing a role similar to a fuse, thereby ensuring that the battery temperature does not rise again, ensuring that the battery will not have high temperature, explosion and other phenomena, and the product safety performance is greatly improved. A bending portion is provided on the upper pole ear, and the bending portion is an arc structure, which is convenient for bending the upper pole ear, and the thickness of the bending portion is thicker than the upper pole ear. The thickness is large, which increases the strength of the bending part and avoids the bending part from breaking when bending; however, in this solution, when the pole ear is anti-corrosion, only wrapping the outside with protective glue is far from achieving the anti-corrosion effect. The protective glue layer always has a certain air permeability and water permeability. The rate at which the protective glue layer permeates water and oxygen is often higher than the rate at which the exposed pole ear surface corrodes and consumes water and oxygen, and thus it is impossible to achieve a complete anti-corrosion effect. In addition, the single exposed outside of the pole ear is easily bent and deformed after long-term use. Therefore, a lithium battery pole ear with strong corrosion resistance is needed to improve the above problems. Utility Model Content

[0004] In order to solve the problem that merely wrapping the outer part of the pole ear with protective glue for corrosion protection is far from achieving the anti-corrosion effect, the protective glue layer always has a certain air permeability and water permeability, and the rate of water and oxygen permeation of the protective glue layer is often higher than the rate of water and oxygen consumption by the exposed pole ear surface corrosion, and thus it is impossible to achieve a complete anti-corrosion effect, and the single exposed outer part of the pole ear is easily bent and deformed after long-term use. The purpose of the utility model is to provide a lithium battery pole ear with strong corrosion resistance to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A lithium battery pole ear with strong corrosion resistance comprises a carrier, a lithium battery assembly is arranged inside the carrier, and a pole ear assembly is fixedly connected to the top of the lithium battery assembly;

[0007] The carrier comprises a nickel-based alloy box, a nickel-based alloy plate is fixedly connected to the side of the nickel-based alloy box, a diaphragm is fixedly connected to the side of the nickel-based alloy plate, an aluminum-plastic packaging film is fixedly connected to the side of the diaphragm, and an iron-based alloy plate is fixedly connected to the side of the aluminum-plastic packaging film;

[0008] The lithium battery assembly comprises a lithium battery body, and heat dissipation holes are provided on the top and bottom of the lithium battery body, and a plurality of heat dissipation holes are provided;

[0009] The pole lug assembly includes a first anti-corrosion grease plate, a galvanized plate is fixedly connected to the side of the first anti-corrosion grease plate, a steel core plate is fixedly connected to the side of the galvanized plate, a copper guide plate is fixedly connected to the side of the steel core plate, a superconducting plate is fixedly connected to the side of the copper guide plate, and a second anti-corrosion grease plate is fixedly connected to the side of the superconducting plate.

[0010] As a preferred solution of the utility model, two tab assemblies are provided, the two tab assemblies are divided into a positive electrode and a negative electrode, and the materials used and specifications of the two tab assemblies are the same.

[0011] As a preferred solution of the utility model, a rectangular groove is provided on the top of the nickel-based alloy box, and a nylon group spacer is fixedly connected inside the rectangular groove, and three nylon group spacers are provided.

[0012] As a preferred solution of the utility model, the galvanized plate, the steel core plate, the copper guide plate and the superconducting plate are arranged between the first anti-corrosion grease plate and the second anti-corrosion grease plate.

[0013] As a preferred solution of the utility model, an insulating sheet is fixedly connected to the side of the lithium battery body, and two insulating sheets are provided.

[0014] As a preferred solution of the utility model, an opening and closing key is fixedly connected to the side of the nickel-based alloy box, and an integrated circuit unit is fixedly connected to the inside of the nickel-based alloy box.

[0015] As a preferred solution of the utility model, an external connection slot is provided at the bottom of the nickel-based alloy box, and a conduction port is provided at the bottom of the nickel-based alloy box.

[0016] As a preferred solution of the utility model, a charging hole is provided at the bottom of the nickel-based alloy box, and a discharging hole is provided at the bottom of the nickel-based alloy box.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. In the utility model, the internal conductor of the pole ear is protected by using the first anti-corrosion grease plate and the second anti-corrosion grease plate, which can prevent harmful gases from entering the inner layer of the pole ear and the intrusion of moisture, thereby greatly improving the corrosion resistance of the pole ear. The pole ear has excellent self-damping performance, good anti-bending and anti-vibration characteristics, which is conducive to extending the service life of the pole ear.

[0019] 2. In the utility model, by using a nickel-based alloy box as a loading box for a lithium battery body, the oxidation resistance, corrosion resistance, high-temperature strength and certain physical properties of the loading box are improved; the aluminum-plastic packaging film has strong air-proof performance, oxidation resistance, waterproof, moisture-proof, high explosion resistance, strong puncture resistance and tear resistance, good heat-sealing performance, flexibility and high barrier performance; the iron-based alloy plate changes the matrix structure of the cast iron, thereby having corresponding heat-resistant, wear-resistant, corrosion-resistant, low-temperature-resistant or non-magnetic properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the nickel-based alloy box of the utility model;

[0022] Figure 3 This is a bottom view structural schematic diagram of the nickel-based alloy box of the utility model;

[0023] Figure 4 It is a schematic diagram of the exploded structure of the tab assembly of the present utility model.

[0024] In the figure: 1. carrier; 101. nickel-based alloy box; 102. nickel-based alloy plate; 103. diaphragm; 104. aluminum-plastic packaging film; 105. iron-based alloy plate; 106. opening and closing key; 107. rectangular groove; 108. nylon group spacer; 109. integrated circuit unit; 110. external slot; 111. charging port; 112. conduction port; 113. discharge port; 2. lithium battery assembly; 201. lithium battery body; 202. heat dissipation hole; 203. insulating sheet; 3. pole ear assembly; 301. first anti-corrosion grease plate; 302. galvanized plate; 303. steel core plate; 304. copper guide plate; 305. superconducting plate; 306. second anti-corrosion grease plate. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] For examples, see Figure 1-Figure 4 , the utility model provides a technical solution:

[0027] A lithium battery pole ear with strong corrosion resistance comprises a carrier 1, a lithium battery assembly 2 is arranged inside the carrier 1, and a pole ear assembly 3 is fixedly connected to the top of the lithium battery assembly 2.

[0028] In this embodiment, Figure 1 , Figure 2 and Figure 4 As shown, the carrier 1 includes a nickel-based alloy box 101, a nickel-based alloy plate 102 is fixedly connected to the side of the nickel-based alloy box 101, a diaphragm 103 is fixedly connected to the side of the nickel-based alloy plate 102, an aluminum-plastic packaging film 104 is fixedly connected to the side of the diaphragm 103, an iron-based alloy plate 105 is fixedly connected to the side of the aluminum-plastic packaging film 104, a lithium battery assembly 2 includes a lithium battery body 201, a heat dissipation hole 202 is opened on the top and bottom of the lithium battery body 201, and a plurality of heat dissipation holes 202 are opened, and the pole ear assembly 3 includes a first anti-corrosion grease plate 301, and a galvanized plate is fixedly connected to the side of the first anti-corrosion grease plate 301. 302, the side of the galvanized plate 302 is fixedly connected with a steel core plate 303, the side of the steel core plate 303 is fixedly connected with a copper guide plate 304, the side of the copper guide plate 304 is fixedly connected with a superconducting plate 305, and the side of the superconducting plate 305 is fixedly connected with a second anti-corrosion grease plate 306. The first anti-corrosion grease plate 301 and the second anti-corrosion grease plate 306 are used to protect the internal conductor of the pole ear, which can prevent harmful gases from entering the inner layer of the pole ear and the invasion of moisture, thereby greatly improving the corrosion resistance of the pole ear. The pole ear has excellent self-damping performance, good anti-bending and anti-vibration characteristics, which is beneficial to extending the service life of the pole ear.

[0029] Among them, there are two pole ear assemblies 3, the two pole ear assemblies 3 are divided into a positive electrode and a negative electrode, the materials used and specifications of the two pole ear assemblies 3 are the same, a rectangular groove 107 is opened on the top of the nickel-based alloy box 101, and a nylon group spacer 108 is fixedly connected inside the rectangular groove 107. There are three nylon group spacers 108. The galvanized plate 302, the steel core plate 303, the copper guide plate 304 and the superconducting plate 305 are arranged between the first anti-corrosion grease plate 301 and the second anti-corrosion grease plate 306. The nickel-based alloy box 101 is used as the loading box of the lithium battery body 201 to improve the oxidation resistance, corrosion resistance, high temperature strength and certain physical properties of the loading box. The aluminum-plastic packaging film 104 has strong air-proof performance, oxidation resistance, waterproof, moisture-proof, high explosion resistance, strong puncture resistance and tearing resistance, good heat sealing performance, softness, and high barrier performance. The iron-based alloy plate 105 changes the matrix structure of the cast iron, thereby having corresponding heat resistance, wear resistance, corrosion resistance, low temperature resistance or non-magnetic properties.

[0030] In this embodiment, Figure 1 and Figure 3As shown, an insulating sheet 203 is fixedly connected to the side of the lithium battery body 201, and two insulating sheets 203 are provided. An opening and closing button 106 is fixedly connected to the side of the nickel-based alloy box 101, and an integrated circuit unit 109 is fixedly connected to the inside of the nickel-based alloy box 101. An external slot 110 is provided at the bottom of the nickel-based alloy box 101, a conduction port 112 is provided at the bottom of the nickel-based alloy box 101, a charging hole 111 is provided at the bottom of the nickel-based alloy box 101, and a discharge hole 113 is provided at the bottom of the nickel-based alloy box 101. The nylon spacer 108 has high wear resistance, prevents the pole ear assembly 3 from bending due to external force, and has non-conductive properties.

[0031] Working process of the utility model: When the lithium battery pole ear with strong corrosion resistance designed by this scheme is working, the pole ear component 3 is the carrier of energy transmission between the lithium battery body 201 and the outside world. Therefore, when the lithium battery body 201 is discharged at a large rate, increasing the conductivity of the pole ear component 3 can effectively improve the rate discharge performance of the lithium battery body 201 in the initial stage of discharge. Two pole ear components 3 are provided, and the two pole ear components 3 are divided into a positive electrode and a negative electrode. The positive and negative electrodes of the pole ear components 3 correspond to the positive and negative electrodes of the lithium battery body 201, and energy transmission can be carried out by connecting an external carrier.

[0032] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery tab with strong corrosion resistance, comprising a carrier (1), characterized in that: A lithium battery assembly (2) is arranged inside the carrier (1), and a tab assembly (3) is fixedly connected to the top of the lithium battery assembly (2); The carrier (1) comprises a nickel-based alloy box (101), a nickel-based alloy plate (102) is fixedly connected to a side of the nickel-based alloy box (101), a diaphragm (103) is fixedly connected to a side of the nickel-based alloy plate (102), an aluminum-plastic packaging film (104) is fixedly connected to a side of the diaphragm (103), and an iron-based alloy plate (105) is fixedly connected to a side of the aluminum-plastic packaging film (104); The lithium battery assembly (2) comprises a lithium battery body (201), the top and bottom of the lithium battery body (201) are provided with heat dissipation holes (202), and the heat dissipation holes (202) are provided with a plurality of; The pole lug assembly (3) comprises a first anti-corrosion grease plate (301), a galvanized plate (302) being fixedly connected to the side of the first anti-corrosion grease plate (301), a steel core plate (303) being fixedly connected to the side of the galvanized plate (302), a copper guide plate (304) being fixedly connected to the side of the steel core plate (303), a superconducting plate (305) being fixedly connected to the side of the copper guide plate (304), and a second anti-corrosion grease plate (306) being fixedly connected to the side of the superconducting plate (305).

2. The lithium battery pole ear with strong corrosion resistance according to claim 1, characterized in that: Two of the pole lug assemblies (3) are provided, and the two pole lug assemblies (3) are divided into a positive electrode and a negative electrode, and the materials used and specifications of the two pole lug assemblies (3) are the same.

3. The lithium battery pole ear with strong corrosion resistance according to claim 1, characterized in that: A rectangular groove (107) is provided on the top of the nickel-based alloy box (101), and a nylon group spacer (108) is fixedly connected inside the rectangular groove (107), and three nylon group spacers (108) are provided.

4. The lithium battery pole ear with strong corrosion resistance according to claim 1, characterized in that: The galvanized plate (302), the steel core plate (303), the copper guide plate (304) and the superconducting plate (305) are arranged between the first anti-corrosion grease plate (301) and the second anti-corrosion grease plate (306).

5. The lithium battery tab with strong corrosion resistance according to claim 1, characterized in that: An insulating sheet (203) is fixedly connected to the side surface of the lithium battery body (201), and two insulating sheets (203) are provided.

6. The lithium battery tab with strong corrosion resistance according to claim 1, characterized in that: An opening and closing key (106) is fixedly connected to the side of the nickel-based alloy box (101), and an integrated circuit unit (109) is fixedly connected to the inside of the nickel-based alloy box (101).

7. The lithium battery pole ear with strong corrosion resistance according to claim 1, characterized in that: An external connection slot (110) is provided at the bottom of the nickel-based alloy box (101), and a conduction port (112) is provided at the bottom of the nickel-based alloy box (101).

8. The lithium battery tab with strong corrosion resistance according to claim 1, characterized in that: A charging hole (111) is provided at the bottom of the nickel-based alloy box (101), and a discharging hole (113) is provided at the bottom of the nickel-based alloy box (101).

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