WO2019113970A1 - Button cell and method for manufacturing same - Google Patents

Abstract

Disclosed is a button cell, comprising a housing (1) and an electrode isolation assembly (2) arranged in the housing (1), wherein the electrode isolation assembly (2) comprises at least one positive electrode (21) and at least one negative electrode (22); the housing (1) comprises a conductive top cover (12), and the top cover (12) is electrically connected to one of the at least one positive electrode (21) and the at least one negative electrode (22); the top cover (12) comprises at least one lead-out hole (123), a conductor (4) is arranged in the at least one lead-out hole (123), an insulation sealing body (3) for insulation from the top cover (12) is arranged between a hole wall of the at least one lead-out hole (123) and the conductor (4), and the conductor (4) is electrically connected to the other of the at least one positive electrode (21) and the at least one negative electrode (22); and the conductor (4) and the insulation sealing body (3) of the button cell are integrally formed to form a combination body with a small size, the assembly thereof being convenient.

Description

Button battery and manufacturing method thereof Technical field

The present invention relates to a battery, and more particularly to a button battery and a method of fabricating the same.

Background technique

Button cells in the known art generally comprise a housing consisting of two electrically conductive housing halves, the lower housing halves being the lower housing and the top cover, respectively. Generally, the lower case has a positive polarity, the top cover has a negative polarity, and the positive and negative electrodes are located at both ends of the button battery. In some applications, if the protection board needs to be installed, the positive and negative input interfaces of the protection board must be electrically connected to the positive and negative terminals of the button battery, so the negative input interface is led out from the top cover, and the positive input interface is from the positive input interface. The lower case is taken out and wounds up to the top of the top cover along the housing, and the space utilization rate is low.

A button battery is provided in the Chinese patent application No. 201710901425.3, the casing of the button battery includes an electrically conductive end wall, the end wall includes at least one lead-out hole, and the at least one lead-out hole is provided with an electric conductor, the at least one An insulating sealing body for insulating the end wall is provided between the hole wall of the lead-out hole and the electric conductor. The positive and negative poles of the button battery are electrically connected to the end wall and the electric conductor on the end wall, respectively, and thus are on the same side of the button battery. However, the conductor and the insulating sealing body of the button battery are bulky and inconvenient to assemble.

technical problem

The technical problem to be solved by the present invention is to provide an improved button battery for the above-mentioned drawbacks of the prior art.

Technical solution

The technical solution adopted by the present invention to solve the technical problem is to construct a button battery including at least one positive electrode and at least one negative electrode; the housing includes an electrically conductive top cover, and the top cover and the at least one positive electrode Electrically connecting with one of the at least one negative electrode; the top cover includes at least one lead-out hole, and the at least one lead-out hole is provided with an electric conductor, the hole wall of the at least one lead-out hole and the electric conductor An insulating sealing body for insulating from the top cover is disposed therebetween, the electrical conductor is electrically connected to another one of the at least one positive electrode and the at least one negative electrode; the electrical conductor and the insulating seal The body is integrally formed into an assembly.

In some embodiments, the positive electrode is electrically connected to the top cover, and the negative electrode is electrically connected to the electrical conductor.

In some embodiments, the button battery further includes a liquid injection hole for injecting an electrolyte into the housing.

In some embodiments, the liquid injection hole is the same as the extraction hole.

In some embodiments, the electrical conductor is integrally molded with the insulating sealing body, and the insulating sealing body is sealingly inserted into the lead-out hole, and the electrical conductor is longitudinally disposed in the insulating sealing body. And both ends thereof are respectively exposed from both ends of the insulating sealing body.

In some embodiments, the electrical conductor is rigid.

In some embodiments, the electrical conductor is flexible.

In some embodiments, the housing includes a cylindrical lower case having an opening at the top and a top cover that is flat and covers the opening, the periphery of the top cover being laser welded and the lower The open edges of the shell are sealingly joined together.

In some embodiments, the button battery further includes a fixing plate disposed above the insulating sealing body for fixing the insulating sealing body in the extraction hole.

In some embodiments, the electrode separator is in the form of a spiral winding whose center axis coincides with the central axis of the housing.

The invention also provides a method for manufacturing a button battery, comprising: a housing and an electrode isolation assembly disposed in the housing, the electrode isolation assembly comprising at least one positive pole and at least one negative pole; the housing comprising a lower shell And a conductive cap corresponding thereto, the cap being electrically connected to one of the at least one positive electrode and the at least one negative electrode; the top cover comprising at least one lead-out hole, the at least one An electric conductor is disposed in the lead-out hole, and an insulating sealing body for insulating with the top cover is disposed between the hole wall of the at least one lead-out hole and the electric conductor, the electric conductor and the at least one positive electrode and the Another electrical connection of the at least one negative electrode; the electrical conductor and the insulating sealing body are integrally formed into a combination; the method comprises the following steps:

(1) providing a lower case and a top cover, and forming a lead-out hole on the top cover, and disposing the electrode isolation component in the lower case; providing an insulating sealing body and an electric conductor, and integrally forming the insulating sealing body and the electric conductor into a combination body;

(2) mounting the top cover on the lower case to form a housing;

(3) Plugging the assembly into the extraction hole.

In some embodiments, after step (2), the method further comprises the step of injecting an electrolyte into the housing through the extraction aperture.

In some embodiments, the one-piece molding is integrally injection molded.

In some embodiments, the lower case is a cylindrical lower case having an opening at the top, and the top cover covers the opening in a flat shape, and the periphery of the top cover is laser welded and the lower side The open edges of the shell are sealingly joined together to form a housing.

Beneficial effect

The invention has at least the following beneficial effects: the conductor of the button battery and the insulating sealing body are integrally formed into a combined body, which is small in size and convenient to assemble; and the liquid injection hole can be the same as the lead-out hole, and the liquid is injected through the lead-out hole. After completion, the combination of the conductor and the insulating sealing body can be inserted, and no additional liquid filling hole is required.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic longitudinal sectional view of a coin cell in some embodiments of the present invention.

Embodiments of the invention

In order to facilitate the understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the invention are given in the drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be more fully understood.

It should be noted that the terms "set", "install", "connected", and "connected" shall be understood broadly, and may be, for example, a fixed connection or a detachable connection, or One-piece connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, which can be the internal connection of the two components. The specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention.

1 shows a button cell in some embodiments of the present invention, the button cell including a sealed housing 1, an electrode isolation assembly 2, an insulative sealing body 3, and an electrical conductor 4. The housing 1 includes a lower case 11 having an opening at the top and an electrically conductive top cover 12 matched thereto, and the top cover 12 is provided with a lead-out hole 123. It is to be understood that the number of the extraction holes 123 is not limited to one, and two or more are also applicable. The electrode isolation assembly 2 is disposed in the housing 1 and includes at least one positive electrode 21 and at least one negative electrode 22 and a separator 23 between the positive electrode 21 and the negative electrode 22. The positive electrode 21 is electrically connected to the top cover 12, and the negative electrode 22 is The electrical conductors 4 are electrically connected. It is to be understood that, in some embodiments, the anode 22 and the cap 12 are electrically connected, and the cathode 21 is electrically connected to the conductor 4 . The insulating sealing body 3 and the electrical conductor 4 are integrally formed into a single assembly. The electric conductor 4 is longitudinally bored in the insulating sealing body 3, and both ends thereof are exposed from both ends of the insulating sealing body 3, respectively. The insulating sealing body 3 is sealingly plugged in the lead-out hole 123 to insulate the conductor 4 from the top cover 12.

As further shown in Fig. 1, the housing 1 may in some embodiments be in the form of a flat cylinder comprising a flat bottom region and a flat top region parallel thereto. The housing 1 may, in some embodiments, include a cylindrical lower casing 11 having an opening at the top, the top cover 12 being flat and covering the opening. The lower case 11 and the top cover 12 may each be made of a metal material, and the periphery of the top cover 12 may be sealingly bonded to the open edge of the lower case 11 by laser welding. In some embodiments, the top cover 12 may also be provided with a liquid injection hole (not shown) for injecting electrolyte into the housing 1. The button battery may further include a blocking member (not shown) for sealing the liquid filling hole after the filling is completed.

The electrode isolation assembly 2 may take the form of a spiral winding or a laminate. In the embodiment shown in FIG. 1, the electrode isolation assembly 2 is in the form of a spiral winding, and wherein the axis coincides with the central axis of the housing 1.

Preferably, the insulating sealing body 3 and the electrical conductor 4 can be formed into an assembly by integral injection molding. In some embodiments, the electrical conductors 4 can be made of a rigid electrically conductive material to enhance compression resistance. In other embodiments, the electrical conductors 4 can also be made of a flexible electrically conductive material such that when a protective plate is required, the electrical conductors 4 can be directly connected to the protective plates or loads without the need for additional soldering wires.

It can be understood that the invention adopts a method in which the insulating sealing body 3 and the electric conductor 4 are integrally formed, which can reduce the volume and facilitate assembly. In this way, the liquid injection hole and the extraction hole 123 can be the same. After the liquid is injected through the extraction hole 123, the combination of the insulating sealing body 3 and the electric conductor 4 can be sealed, and no additional liquid injection is required. hole.

In some embodiments, the button cell further includes a fixing plate 5 disposed above the insulating sealing body 3 for fixing the insulating sealing body 3 in the extraction hole 123.

When the above button battery is manufactured, the following steps can be taken:

(1) providing a lower case 11 and a top cover 12, forming a lead-out hole 123 in the top cover 12;

(2) providing an insulating sealing body 3 and an electrical conductor 4, and integrally molding the insulating sealing body 3 and the electrical conductor 4 into a combined body;

(3) disposing the electrode isolation assembly 2 in the lower case 1;

(4) injecting an electrolyte into the casing 1 through the outlet hole 123;

(5) welding the top cover 12 to the opening of the lower casing 11 by means of laser welding to form the casing 1;

(6) The assembly formed by integrally injecting the insulating sealing body 3 and the conductor 4 into the lead-out hole 123;

(7) Install the fixing plate 5.

The above-mentioned numbers do not represent the order, and those skilled in the art can change the above order without departing from the scope of the present invention.

It is to be understood that the above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and are not to be construed as limiting the scope of the invention; The above technical features may be freely combined, and various modifications and improvements may be made without departing from the spirit and scope of the invention; therefore, the scope of the claims of the present invention is Equivalent transformations and modifications are intended to be included within the scope of the appended claims.

Claims (14)

A button battery includes a housing and an electrode isolation assembly disposed in the housing, the electrode isolation assembly including at least one positive electrode and at least one negative electrode; the housing includes an electrically conductive top cover, the top cover and the cover One of the at least one positive electrode and the at least one negative electrode is electrically connected; the top cover includes at least one lead-out hole, and the at least one lead-out hole is provided with an electrical conductor, and the at least one lead-out hole has a hole wall and An insulating sealing body for insulating from the top cover is disposed between the electrical conductors, and the electrical conductor is electrically connected to the other of the at least one positive electrode and the at least one negative electrode, wherein The electrical conductor and the insulating sealing body are integrally formed into a single assembly. The button battery according to claim 1, wherein the positive electrode is electrically connected to the top cover, and the negative electrode is electrically connected to the electrical conductor. The button battery according to claim 1, wherein the button battery further comprises a liquid injection hole for injecting an electrolyte into the housing. The coin cell battery according to claim 3, wherein the liquid injection hole and the extraction hole are the same. The button battery according to claim 1, wherein the electric conductor is integrally injection molded with the insulating sealing body, and the insulating sealing body is sealingly plugged in the lead-out hole, and the electric conductor is longitudinally worn. The insulating sealing body is disposed in the insulating sealing body, and both ends thereof are respectively exposed from both ends of the insulating sealing body. The coin cell battery according to claim 5, wherein the electrical conductor is rigid. The coin cell battery according to claim 5, wherein the electrical conductor is flexible. The button battery according to claim 1, wherein the housing comprises a cylindrical lower case having an opening at the top, and a top cover having a flat shape and covering the opening, the periphery of the top cover passing The manner of laser welding is sealingly bonded to the open edge of the lower casing. The button battery according to claim 1, wherein the button battery further comprises a fixing plate disposed above the insulating sealing body for fixing the insulating sealing body in the extraction hole. The coin cell according to claim 1, wherein said electrode separator is in the form of a spiral winding, and a center axis of said electrode separator coincides with a central axis of said casing. A button battery manufacturing method, characterized in that the button battery comprises a housing and an electrode isolation assembly disposed in the housing, the electrode isolation assembly comprises at least one positive pole and at least one negative pole; the housing comprises a lower shell And a conductive cap corresponding thereto, the cap being electrically connected to one of the at least one positive electrode and the at least one negative electrode; the top cover comprising at least one lead-out hole, the at least one An electric conductor is disposed in the lead-out hole, and an insulating sealing body for insulating with the top cover is disposed between the hole wall of the at least one lead-out hole and the electric conductor, the electric conductor and the at least one positive electrode and the Another electrical connection of the at least one negative electrode; the electrical conductor and the insulating sealing body are integrally formed into a combination; the method comprises the following steps: (1) providing a lower case and a top cover, and forming a lead-out hole on the top cover, and disposing the electrode isolation component in the lower case; providing an insulating sealing body and an electric conductor, and integrally forming the insulating sealing body and the electric conductor into a combination body; (2) mounting the top cover on the lower case to form a housing; (3) Plugging the assembly into the extraction hole. The method of manufacturing a button battery according to claim 11, wherein after the step (2), the method further comprises the step of injecting an electrolyte into the casing through the extraction hole. The method of manufacturing a button battery according to claim 11, wherein the integrally formed manner is an integral injection molding. The method of manufacturing a button battery according to claim 11, wherein the lower case is a cylindrical lower case having an opening at the top, and the top cover is covered on the opening in a flat shape, and the top cover is The periphery is sealingly joined to the open edge of the lower case by laser welding to form a housing.