KR100651057B1 - Internal-organs type battery pack for mobile communications terminals and its manufacture method - Google Patents

Abstract

An embedded battery pack for a mobile communication terminal is provided to simplify the processing steps required for manufacturing a battery pack, and to facilitate spot welding. The embedded battery pack for a mobile communication terminal comprises: a cell(10) having a cathode terminal(120) and an anode terminal(110); an upper casing(20) attached to the top surface of the cell and having an opened top surface and bottom surface; a PCM assembly(30) received inside the upper casing through the opened top surface, wherein the PCM assembly includes an opening, through which a spot welding tip comes in/out, and a cathode nickel plate(42) and an anode nickel plate(41) spot-welded to the cathode terminal and the anode terminal; and an insulation pad(50) attached to the top surface of the PCM assembly.

Description

Internal-organs type battery pack for mobile communications terminals and Its manufacture method}

1 is a combined perspective view of a built-in battery pack for a mobile communication terminal according to the present invention,

2 is an exploded perspective view of a built-in battery pack for a mobile communication terminal according to the present invention;

3 is a bottom perspective view of the PCM assembly according to the present invention;

4 is a cross-sectional view of the PCM assembly and the upper case in accordance with the present invention;

5 is a coupling plan view of the PCM assembly and the upper case according to the present invention,

6 is a process chart showing a manufacturing method of a built-in battery pack for a mobile communication terminal according to the present invention;

7 is an exploded perspective view of a built-in battery pack for a conventional mobile communication terminal.

<Description of the symbols for the main parts of the drawings>

10: battery cell 20: upper case

30: PCM assembly 41: cathode nickel plate

42: anode nickel plate 50: insulating pad

60: lower case 70: packaging label

110: cathode terminal 120: anode terminal

230: locking jaw 250: protrusion

310: protection circuit 330: external I / O connection terminal

340: opening 350: coupling groove

530: opening

The present invention relates to a built-in battery pack for a mobile communication terminal and a method for manufacturing the same, and more particularly, a mobile communication terminal that provides a structure and environment for shortening the assembly process and facilitating spot welding operations when manufacturing a battery pack. The present invention relates to a built-in battery pack and a method of manufacturing the same.

7 is a perspective view of an exploded state of a built-in battery pack for a conventional mobile communication terminal, and is assembled in the following process. The clad metal 910 and the bimetal insert molding block 920 are spot welded to the positive electrode terminal 902 and the negative electrode terminal 901 formed on the vertical upper surface of the battery cell 900, respectively, and the vertical image of the battery cell 900 is vertically welded. Attach the PCM guide block 930 with a bond to the side. Then, the anode nickel plate 942 on one side and the cathode nickel plate 941 on the other side are soldered to each other, and the PCM assembly 950 is inserted into the PCM guide block 930 and the anode nickel plate 942 and the cathode. The nickel plate 941 is spot welded to the clad metal 910 and the bimetal insert molding block 920, respectively. And the upper case block 960 is fitted to the PCM guide block 930 to be coupled. The lower case 970 is attached to the lower side of the battery cell 900 by using a double-sided tape. The battery cell 900, the clad metal 910, the bimetal insert molding block 920, the PCM guide block 930, the PCM assembly 950, and the upper case block 960 are entirely wrapped and protected. The packaging label 980 is attached.

However, the conventional battery pack for a conventional mobile communication terminal manufactured by the above method has the following problems.

Since a plurality of configurations are included, the process for assembling them is complicated, and the labor and cost for self-molding of a PCM guide block and an upper case block having a three-dimensional shape are consumed.

Also, when the anode and cathode nickel plates soldered to the PCM assembly are inserted into the PCM guide block and spot welded to the clad metal and bimetallic insert molding blocks, the PCM guide block does not firmly fix the PCM assembly. It is easy to do and therefore does not provide a stable environment for spot welding. Furthermore, the space between the PCM assembly and the PCM guide block is so small that the spot welding tip is not easily accessible and therefore cannot perform sophisticated and effective work.

The present invention is to solve the above problems, an object of the present invention is to simplify the assembly process by reducing the number of members to be assembled, built-in battery pack for a mobile communication terminal to reduce the labor and manufacturing cost consumed and its manufacture To provide a method.

It is another object of the present invention to provide a structure and an environment for easily welding a positive electrode plate and a negative electrode plate to a positive electrode terminal and a negative electrode terminal of a battery cell when manufacturing a battery pack. The present invention provides a battery pack and a method of manufacturing the same.

In order to achieve the above object, the present invention includes a battery cell capable of charging and discharging the positive terminal and the negative electrode terminal on the upper side; An upper case attached to an upper side of the battery cell and having an upper side and a lower side open to penetrate each other; It is seated inside the upper case through the open upper side of the upper case, and an opening is formed at one side to allow the spot welding tip to enter and exit, and the lower side has a spot at each of the positive and negative terminals of the battery cell. A PCM assembly to which the positive and negative nickel plates to be welded are respectively soldered; An insulating pad attached to an upper side of the PCM assembly seated on the upper case and finished; It provides a built-in battery pack for a mobile communication terminal, characterized in that configured to include.

Furthermore, a coupling groove is formed at both ends of the PCM assembly, and a locking jaw in which the side end of the PCM assembly is caught and the protrusion is engaged with the coupling groove are further formed on the upper inner surface of the upper case. It provides a built-in battery pack for communication terminals.

Furthermore, attaching an upper case having a structure in which the upper side and the lower side are opened to penetrate each other to the upper side of the battery cell; Soldering the anode nickel plate and the cathode nickel plate to the lower side of the PCM assembly having an opening through which a spot welding tip can enter and exit at one side; Mounting the PCM assembly inside the upper case through an open upper side of the upper case; Spot welding the positive and negative electrode plates to the positive and negative terminals of the battery cell, respectively, through the openings formed in the PCM assembly; It provides a manufacturing method of a built-in battery pack for a mobile communication terminal, characterized in that it comprises a; attaching and closing the insulating pad on the upper side of the PCM assembly seated on the upper case.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments.

1 is a combined perspective view of a built-in battery pack for a mobile communication terminal according to the present invention, Figure 2 is an exploded perspective view of a built-in battery pack for a mobile communication terminal according to the present invention.

As shown, the battery pack includes a battery cell 10, a PCM assembly 30, a positive nickel plate 42 and a negative nickel plate 41, an upper case 20, an insulating pad 50, and a lower case 60. ), And a packing label 70.

First, the battery cell 10 is a lithium ion battery having a positive terminal 120 and a negative terminal 110 formed on an upper side thereof to provide a rated voltage.

In addition, the PCM assembly 30 is a plate having substantially the same size as the upper surface of the battery cell 10, and the external I / O connection terminal 330 or the like is formed on one surface serving as a main surface with gold plating. In addition, a protective circuit 310 that protects the battery cell from overcharge and overdischarge and a fuse 320 to block overcurrent are formed on the rear surface of the external input / output connection terminal 330 and the like as shown in FIG. 3. It is. In some cases, the fuse 320 may be replaced with a PTC or a bimetal.

In addition, the PCM assembly 30 includes a positive electrode plate 42 and a negative electrode plate 41 for energizing the PCM assembly 30 and the battery cell 10 to the positive electrode terminal 120 and the negative electrode terminal 110, respectively. When spot welding, the opening 340 is provided to allow the spot welding tip to enter and exit. Preferably two are formed. In this case, the opening portion 340 is formed to be vertically located above the positive electrode terminal 120 and the negative electrode terminal 110.

The anode nickel plate 42 and the cathode nickel plate 41 are all made of nickel, and preferably have a stepped shape or a 'Z' shaped bent shape. One side of the positive electrode nickel plate 42 and the negative electrode nickel plate 41 is soldered to the lower side of the PCM assembly 30 at a certain distance from the opening 340, the other side is vertically downward of the opening 340 It is desirable to position. When spot welding the anode nickel plate 41 and the cathode nickel plate 42 to the anode terminal 110 and the cathode terminal 120, respectively, the spot welding tip is approached perpendicularly to the welding site through the opening 340, To perform sophisticated and effective spot welding.

The upper case 20 has a columnar shape in which an upper side and a lower side are opened to penetrate each other, and is attached to an upper side of the battery cell 10 to seat and fix the PCM assembly 30. The upper case 20 is manufactured by injection molding on a mold, for example, and preferably has a plastic material. Attaching the upper case 20 to the battery cell 10 is made by a bond, and in some cases, various kinds of adhesive materials may be used, and a separate fastening means may be added.

4 is a cross-sectional view of the PCM assembly 30 and the upper case 20 according to the present invention in relation to the PCM assembly 30 is seated on the upper case 20, Figure 5 is a PCM according to the present invention Coupling plan view of the assembly 30 and the upper case 20.

As shown in the upper inner surface of the upper case 20, the locking projection 230 and the protrusion 250 is formed, the coupling groove 350 is formed at both ends of the PCM assembly 30. Thus, the side end portion of the PCM assembly 30 is placed on the locking jaw 230, and the coupling groove 350 and the protrusion 250 of the upper case 20 formed at both side ends of the PCM assembly 30 are formed. Interlock and fit. However, in addition, in some cases, a variety of configurations for easy coupling or improvement of coupling force may be applied, such as a separate fastening means may be added to increase the coupling force.

Therefore, when spot-welding the positive electrode nickel plate 42 and the negative electrode nickel plate 41 soldered to the PCM assembly 30 to the positive electrode terminal 120 and the negative electrode terminal 110 of the battery cell 10, respectively, Since the upper case 20 firmly fixes the PCM assembly 30, the spot welding is performed in a stable state in which the PCM assembly 30 does not flow.

The insulating pad 50 is a plate having the same size and shape as the upper side of the PCM assembly 30, and has a material of various synthetic resins, such as polycarbonate (PC) and poly ethylene (PE), and the PCM assembly 30 An opening 530 is formed at one side of the external input / output connection terminal 330 of the to be exposed to the outside. Further, the insulating pad 50 is preferably coated with an adhesive material on the lower side and finished with release paper so that the release paper is peeled off and then attached to the upper side of the PCM assembly 30. At this time, the insulating pad 50 performs a function of preventing the upper surface of the PCM assembly 30 from being exposed to the outside.

In addition, the lower case 60 is attached to the lower end of the battery cell 10, for example, manufactured by injection molding on a mold, and preferably made of a plastic material. Attaching the lower case 60 to the battery cell 10 is made by a bond, and in some cases, various kinds of adhesive materials may be used, and a separate fastening means may be added.

The packaging label 70 wraps the battery cell 10, the upper case 20, the PCM assembly 30, and the lower case 60 in a combined state, and preferably the lower end of the upper case 20 and By enclosing and attaching the upper end of the lower case 60 to improve the coupling of these and the battery cell 10.

6 is a process chart showing a manufacturing method of a built-in battery pack for a mobile communication terminal according to the present invention. As shown, a process of assembling a built-in battery pack for a mobile communication terminal according to the present invention is as follows.

(1) inspecting the battery cells (S10)

(2) attaching the upper case to the battery cell (S12)

(3) soldering the anode nickel plate and the cathode nickel plate to the PCM assembly (S14)

(4) mounting the PCM assembly on the upper case (S16)

(5) spot welding the anode and cathode nickel plates to the anode and cathode terminals, respectively (S18);

(6) functional test step of checking the electrical characteristics (S20)

(7) attaching the insulating pad to the upper surface of the PCM assembly (S22)

(8) attaching the lower case to the battery cell (S24)

(9) attaching the packaging label (S26)

(10) step of inspecting the appearance of the product (S28)

Hereinafter, a method of manufacturing a built-in battery pack for a mobile communication terminal according to the present invention will be described in detail.

First, the upper case 20 having an upper side and a lower side open to attach to the upper side of the battery cell 10 is attached (S12) . In this case, preferably, the upper case 20 is attached by applying a bond to the upper side of the battery cell 10, but in some cases, various kinds of adhesives may be used to increase the bonding force, and a separate fastening means may be added. Can be.

Next, the anode nickel plate 42 and the cathode nickel plate 41 are soldered to the lower surface of the PCM assembly 30 having the opening 340 through which the spot welding tip enters and exits (S14).

Next, the PCM assembly 30 is seated inside the upper case 20 through the open upper side of the upper case 20 (S16). At this time, preferably the upper jaw 230 and the locking projection 230 and the protrusion 250 is formed on the upper case 20, the coupling groove 350 is formed at both ends of the PCM assembly 30, The side end portion of the PCM assembly 30 is mounted on the locking jaw 230, and the engaging groove 350 formed at both side ends of the PCM assembly 30 and the protrusion 250 of the upper case 20 are engaged with each other. Fit together.

Next, the positive electrode nickel plate 42 and the negative electrode nickel plate 41 are connected to the positive electrode terminal 120 and the negative electrode terminal 110 of the battery cell 10 through the opening 340 formed in the PCM assembly 30. Spot welding (S18). In this case, preferably, the spot welding tip is vertically approached to the spot welding portion through the opening 340 to perform spot welding.

Next, the upper surface of the PCM assembly 30 seated on the upper case 20 is attached to the insulating pad 50 to finish (S22). At this time, the release paper attached to the lower side of the insulating pad 50 is removed, and the adhesive material is applied while exposing the external input / output terminals 330 of the PCM assembly 30 to the opening 530 formed in the insulating pad 50. The lower side of the insulating pad 50 is placed on the upper side of the PCM assembly 30.

Next, the lower case 60 is attached to the lower end of the battery cell 10 (S24). In this case, although a bond is used, in some cases, various kinds of adhesives may be used to increase the bonding force, and a separate fastening means may be added.

Next, the lower end of the upper case 20, the battery cell 10 and the upper end of the lower case 60 is attached to the wrapping label 70 to protect the whole (S26).

As described above, the present invention has an effect of reducing the manufacturing cost by simplifying the assembly process of the battery pack by reducing the labor force and the number of members required.

In addition, since the PCM assembly having an opening on which one side of the spot welding tip enters and exits is seated on the upper case, it has an effect of providing an easy structure and environment for spot welding.

Claims (3)

A battery cell 10 capable of charging and discharging having an anode terminal 120 and a cathode terminal 110 formed on an upper side thereof; An upper case 20 attached to an upper side of the battery cell 10 and having an upper side and a lower side open to penetrate each other; It is seated in the interior of the upper case 20 through the open upper side of the upper case 20, the opening 340 is formed on one side through which the spot welding tip can enter, the lower side of the battery cell A PCM assembly 30 to which the positive electrode nickel plate 42 and the negative electrode nickel plate 41, which are spot welded to the positive electrode terminal 120 and the negative electrode terminal 110, respectively (10) are soldered, respectively; An insulating pad 50 attached to an upper side of the PCM assembly 30 seated on the upper case 20 and finished; Built-in battery pack for a mobile communication terminal, characterized in that comprising a. The method of claim 1, Coupling grooves 350 are formed at both ends of the PCM assembly 30, The upper inner surface of the upper case 20 is characterized in that the protrusion (250) is further formed to engage the engaging jaw 230 and the engaging groove 350 is fitted to the side end of the PCM assembly 30 is hooked up; Built-in battery pack for mobile communication terminals. Attaching an upper case 20 having an upper side and a lower side to penetrate each other to an upper side of the battery cell 10 (S12); Soldering the positive electrode nickel plate 42 and the negative electrode nickel plate 41 to the lower side of the PCM assembly 30 having the opening 340 through which the spot welding tip enters and exits (S14); Mounting the PCM assembly 30 in the upper case 20 through an open upper surface of the upper case 20 (S16); Spot welding of the positive electrode nickel plate 42 and the negative electrode nickel plate 41 to the positive electrode terminal 120 and the negative electrode terminal 110 of the battery cell 10 through the opening 340 formed in the PCM assembly 30, respectively. Step S18; Attaching and closing the insulating pad 50 on the upper side of the PCM assembly 30 seated on the upper case 20 (S22); Built-in battery pack for a mobile communication terminal comprising a Manufacturing method.

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