Three-electrode device of cylindrical metal ion battery

Abstract

The utility model belongs to the technical field of ion batteries, and particularly relates to a three-electrode device of a cylindrical metal ion battery, which adopts the following scheme that the three-electrode device comprises a positive plate, the diaphragm is attached to the positive plate; the negative plate is attached to the diaphragm; the bottom of the reference electrode copper wire extends to the inner side of the positive plate; the three-electrode device comprises a reference electrode copper wire and a nickel sheet, the nickel sheet is fixedly mounted at the top end of the reference electrode copper wire, and a high-temperature adhesive tape is wound on the shell side of the reference electrode copper wire. The reference electrode copper wire of the three-electrode device of the metal ion battery is led out from the positive electrode end, embedding of the reference electrode copper wire can be completed in the winding process, the middle section of the reference electrode copper wire is wrapped with a high-temperature adhesive tape, and the reference electrode copper wire is prevented from being damaged during short circuit and sealing.

Description

TECHNICAL FIELD

[0001] The utility model relates to ion battery technical field especially relates to a cylindrical metal ion battery three electrode device. BACKGROUND

[0002] Metal ion battery is widely used in new energy automobile, portable energy storage and other fields due to the advantages of high energy density, long cycle life and the like. During the charging and discharging process of the metal ion battery, undesirable electrochemical reactions occur inside the battery, such as electrolyte consumption, negative electrode metal deposition, and the like. These undesirable chemical reactions can affect the cycle life and safety performance of the battery. At this time, a reference electrode (i.e., a three-electrode device) is introduced into the full battery, and the introduction of the reference electrode can monitor the internal side reactions in situ during the charging and discharging process of the battery.

[0003] In the conventional metal ion battery three-electrode device, when the reference electrode copper wire is buried, the wound core after winding is disassembled in advance, and a hole is punched at the bottom of the steel shell. The reference electrode copper wire is pulled out from the bottom hole, and then the processes of battery bottoming, rolling groove, liquid injection, sealing, cleaning, and thermoplastic are completed. Finally, a nickel sheet is welded to the part of the reference electrode copper wire that protrudes out, and the manufacturing is completed. The disadvantage of this method is that the introduced reference electrode copper wire is located at the bottom of the steel shell. During the processes of battery bottoming, rolling groove, liquid injection, and sealing, there will be a certain pressure on the bottom of the shell, and the reference electrode copper wire will be broken due to the extrusion. After the battery is sealed, the small hole at the bottom of the shell needs to be sealed with liquid glue. If the sealing is not tight or gas is produced during the charging and discharging of the battery, it will cause the battery to leak, thereby causing danger. Therefore, the utility model provides a cylindrical metal ion battery three-electrode device to solve the above problems. UTILITY MODEL CONTENTS

[0004] The utility model discloses a cylindrical metal ion battery three-electrode device to solve the above problems.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A cylindrical metal ion battery three-electrode device comprises

[0007] A positive electrode sheet;

[0008] a diaphragm, which is attached to the positive electrode sheet;

[0009] a negative electrode sheet, which is attached to the diaphragm;

[0010] a reference electrode copper wire, the bottom of which extends to the inner side of the positive electrode sheet;

[0011] a nickel sheet, which is fixedly installed at the top end of the reference electrode copper wire.

[0012] As a preferred scheme of the utility model, the shell side of the reference electrode copper wire is wrapped with high-temperature adhesive tape. Beneficial effects

[0013] The utility model does not need to punch the battery bottom steel shell, and the reference electrode copper wire is led out from the battery positive electrode end cap and the steel shell connecting place, reduces the operation procedure, saves the process time, and reduces the manufacturing cost;

[0014] The reference electrode copper wire is led out from the positive electrode, reduces the damage of the reference electrode copper wire caused by the excessive pressure of the battery bottom in the process of battery point bottom, rolling groove, liquid injection and sealing process, and improves the qualified rate of the battery;

[0015] The utility model does not punch the shell bottom, does not damage the whole steel shell, avoids the liquid leakage of the punching sealing position caused by the internal pressure increase of the battery during the later charging and discharging;

[0016] In the utility model, the metal ion battery three-electrode device is not only suitable for cylindrical lithium ion batteries, but also suitable for cylindrical sodium and aluminum metal ion batteries; the reference electrode copper wire of the metal ion battery three-electrode device is led out from the positive electrode end, and the embedding of the reference electrode copper wire can be completed in the winding process; the middle section of the reference electrode copper wire is wrapped with high-temperature adhesive tape to prevent short circuit and damage to the reference electrode copper wire during sealing. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the front view of the utility model;

[0018] Figure 2 It is the front view of the utility model.

[0019] In the drawing, 1 is a positive electrode sheet; 2 is a negative electrode sheet; 3 is a diaphragm; 4 is a reference electrode copper wire; 5 is high-temperature adhesive tape; and 6 is a nickel sheet. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Apparently, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. EMBODIMENT

[0021] Referring to Figures 1-2 A cylindrical metal ion battery three-electrode device comprises

[0022] A positive plate 1;

[0023] A diaphragm 3 is attached to the positive plate 1;

[0024] A negative plate 2 is attached to the diaphragm 3;

[0025] A reference electrode copper wire 4 extends to the inside of the positive plate 1 at the bottom of the reference electrode copper wire 4;

[0026] A nickel plate 6 is fixedly installed at the top end of the reference electrode copper wire 4.

[0027] Through the above structure: the metal ion battery three-electrode device is not only suitable for cylindrical lithium ion batteries, but also suitable for cylindrical metal ion batteries such as sodium and aluminum; the reference electrode copper wire 4 of the metal ion battery three-electrode device is drawn out from the positive electrode end, and the embedding of the reference electrode copper wire 4 can be completed during the winding process; the middle section of the reference electrode copper wire 4 is wrapped with high-temperature adhesive tape 5 to prevent short circuit and damage to the reference electrode copper wire 4 during sealing.

[0028] As a preferred scheme of the utility model, the high-temperature adhesive tape 5 is wound on the shell side of the reference electrode copper wire 4.

[0029] The working principle of the utility model: the reference electrode copper wire 4 is a copper enameled wire with a diameter of 15-50 μm and a total length of 6-8 cm; the head length of 3-4 cm is removed in advance with a paint remover to remove the insulating layer, the middle part of 1-1.5 cm of the reference electrode copper wire 4 is wrapped with 5 high-temperature adhesive tape 5, the reference electrode copper wire 4 is drawn out from the positive electrode end, the reference electrode copper wire 4 is embedded between the positive plate 1 and the negative plate 2 after removing the insulating layer part, and is separated by the diaphragm 3, part of the high-temperature adhesive tape 5 is in the winding core, and part of the high-temperature adhesive tape 5 leaks out, and this step can be completed in the winding process, as shown in the accompanying drawings, after the reference electrode copper wire 4 is embedded in the winding core, the battery is subjected to point bottom, rolling groove, liquid injection and sealing, the reference electrode copper wire 4 is directly drawn out from between the cap and the steel shell at the drawn-out end when the battery is sealed, the high-temperature adhesive tape 5 is just between the cap and the steel shell, and the high-temperature adhesive tape 5 plays a role in protecting the reference electrode copper wire 4; then the battery cleaning, thermoplastic and other processes are completed, the three-electrode manufacturing method of the utility model can embed the reference electrode copper wire 4 in the winding core during winding, does not need to disassemble the winding core after winding, and can complete the operation by welding the nickel plate 6 at the drawn-out end of the reference electrode copper wire 4 after sealing the battery, so that the process is simple, the operation is convenient, and the qualified rate is high. Figure 1

[0030] ​The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A cylindrical metal-ion battery three-electrode device, characterized by, Comprising A positive electrode sheet (1); A separator (3) adhered to the positive electrode sheet (1); A negative electrode sheet (2) adhered to the separator (3); A reference electrode copper wire (4) with the bottom extending to the inner side of the positive electrode sheet (1); A nickel sheet (6) fixedly installed at the top end of the reference electrode copper wire (4).

2. A cylindrical metal-ion battery three-electrode device according to claim 1, wherein, The outer shell side of the reference electrode copper wire (4) is wrapped with a high-temperature adhesive tape (5).

Images