KR20050103521A - Inner battery pack for mobile communication terminal and method of assembling the same - Google Patents

Abstract

The present invention provides a battery cell (9) for providing a rated voltage; A clad metal 13 which is a rectangular plate body having a hole formed in the center thereof and is spot welded to a positive electrode terminal (+) on one side of a vertical upper surface of the battery cell 9 to be fused; A bimetal insertion molding block 15 inserted into the bimetal 5 and a nickel plate 6 attached to one vertical surface of the bimetal 5 to be ejected and attached to the vertical upper surface of the battery cell 9; Holes are formed at both sides of the PCM guide block 14 is bonded to the vertical top surface of the battery cell (9); A PCM assembly 3 having a negative electrode nickel plate 4 and a positive electrode nickel plate 7 soldered on both sides of one surface thereof, and spot-welded by being seated on an upper surface of the PCM guide block 14; Built-in battery for a mobile communication terminal, characterized in that consisting of; the upper case block (2) is seated in the state of being fitted to the PCM guide block 14 is fixed by a locker (Locker) standing on the surface of the PCM guide block 14; It relates to a pack and an assembly method thereof.

Description

Built-in battery pack for mobile communication terminal and its assembly method {INNER BATTERY PACK FOR MOBILE COMMUNICATION TERMINAL AND METHOD OF ASSEMBLING THE SAME}

The present invention relates to a built-in battery pack for a mobile communication terminal and a method for assembling the same, and more particularly, to solve various manufacturing difficulties that have occurred in the past, to dramatically shorten the work process required for assembly, and to reduce the battery cell. The present invention relates to a built-in battery pack for a mobile communication terminal and a method of assembling the same, thereby generating various effects such as ensuring a reliability of a battery cell by not performing a direct injection molding process.

1 is an exploded perspective view of a battery pack disassembled in a conventional mobile communication terminal provided with a built-in battery pack.

As shown in FIG. 1, a mobile communication terminal (a portable terminal such as a cellular phone (CDMA terminal), a PCS (Personal Communication Services), or a GSM terminal) equipped with a conventional built-in battery pack includes a main body 100 and a battery. Comprising a housing 110, the battery pack 120, the battery cover 130, the battery pack 120 is mounted inside the main body 100, the cover is installed so as to surround the battery pack 120 To form a structure. When an external battery is used, a hard pack battery is detachably installed on the rear of the main body so that the battery is exposed to the outside. On the other hand, the mobile communication terminal according to FIG. A built-in battery pack of a type housed in an exterior body is used. In such a built-in battery pack, in order to secure the battery and the protection circuit board, a method of accommodating the outer cover consisting of an upper cover and a lower cover has become common, and in recent years, a protection circuit board and The method of filling a gap with a battery with low temperature molding resin, or coat | covering a battery with low temperature molding resin, and shape | molding a resin mold is employ | adopted.

In addition, for the purpose of miniaturization of the battery pack, an external input / output terminal for connecting the battery pack and an external circuit is not separately mounted to the outside of the battery pack using a terminal block or a lead wire, but instead of one side of the protection circuit board. It is formed so as to be exposed to the outside.

2A to 2C are perspective views of types of conventional built-in battery packs, and a dual type built-in battery pack employing both a hard case type and an insert molding type is shown.

Based on this type of battery pack, inside the mold where the battery holder and the substrate holder of SANYO (company name) are installed with a gap therebetween, the battery holder is held at the same time as the battery holder is held. A method of forming an external input / output terminal by holding a substrate and filling a gap with a molding material, and attaching a positive / negative nickel plate (+,-Ni-Plate) of LG (LG) to the PCM perpendicularly to the PCM. The entire molding is performed, and the bimetal and nickel plates are vertically attached to the negative electrode terminal (-) of the cell, and the nickel plates are vertically attached to the positive electrode terminal (+) to attach the PCM molding part and the cell part to both sides. On the side, a method of spotting with ultrasonic waves, a method of putting a soft pack after attaching a cell and a PCM to the case injection of Samsung SDI (SS SDI) is proposed.

However, in the case of the built-in battery pack as shown in FIG. 1, it is necessary to accurately secure the relative position of the external input / output terminals with respect to the exterior body or the resin mold in the manufacturing process of the battery pack. There were inconveniences in the manufacturing process, such as fixing the circuit board to a predetermined position with respect to the battery, and even in the case of the built-in battery pack as shown in FIGS. 2A to 2C, there were various manufacturing difficulties and inconveniences.

Accordingly, an object of the present invention is to provide a new type of built-in battery pack for a mobile communication terminal and a method of assembling which can solve various manufacturing difficulties that have been inevitably generated and can significantly shorten the work process required for assembly. have.

Another object of the present invention is to reduce the number of parts of the raw and subsidiary materials to increase the productivity and quality through reducing the cost and improving the manufacturing process, and to dramatically increase the contribution of recycling of major parts such as battery cells and PCM assemblies in the event of a defect An internal battery pack for a communication terminal and an assembly method thereof are provided.

Still another object of the present invention is to provide a built-in battery pack for a mobile communication terminal and a method for assembling the same, thereby ensuring the reliability of the battery cell by not performing a process of directly injection molding the battery cell.

The built-in battery pack for a mobile communication terminal according to the present invention for achieving the above object is detachably mounted in the inside of the mobile communication terminal, the battery pack for providing a rated voltage of the mobile communication terminal, the positive electrode on the vertical upper surface A battery cell 9 having a terminal (+) and a negative terminal (−) formed thereon to provide a rated voltage, and a rectangular plate body having a hole formed at the center thereof, and having a positive electrode on one side of a vertical upper surface of the battery cell 9. The clad metal 13, which is spot welded to the terminal +, and welded, and the bimetal 5 and the nickel plate 6 attached to one vertical surface of the bimetal 5 are inserted and injected into the battery cell 9. A bimetal insert molding block 15 attached to a vertical upper surface and a hole are formed at both sides of the bimetal insert molding block 15 so that the clad metal 13 and the bimetal insert molding block 15 are perpendicular to the battery cell 9. PCM guide block (14) bonded to the top surface ), And the negative electrode nickel plate 4 and the positive electrode nickel plate 7 are soldered on both sides of one surface, and are mounted on the upper surface of the PCM guide block 14 so that the positive electrode nickel plate 7 is the clad metal. The negative electrode nickel plate 4 is seated in the state of being fitted to the PCM assembly 3 and the PCM guide block 14, respectively, spot welded to the bimetal 5, and the PCM guide block 14. It characterized in that it comprises a top case block (2) that is fixed by a locker (Locker) standing on the surface.

In the battery cell 9, an aluminum top can is formed by a predetermined length along the outline of the vertical upper surface where the positive terminal (+) and the negative terminal (−) are formed to deform the body of the battery cell 9. The upper case block 2 may be configured to be pushed into the aluminum top can erected on the battery cell 9 to be seated therein.

A case body is formed to surround both the battery cell 9 and the upper case block 2 attached to the battery cell 9 so that the upper case block 2 is replaced by the battery cell 9. It may be configured to be pushed and fixed to penetrate the case body after being attached to the preformed case.

The lower case 12 is attached to the lower part of the battery cell 9 using a double-sided tape 11, and a test point 2a is processed at the center of the vertical upper surface of the upper case block 2 so that a test point label ( 1) is attached, the battery cell 9, the clad metal 13, the bimetal insert molding block 15, the PCM guide block 14, the PCM assembly 3, the upper case block (2) ) Can be configured to attach a wrapping label 10 that encloses and protects the entirety thereof.

The vent hole 9a is processed at one side of the vertical upper surface of the battery cell 9, and a hole is attached to the center of the clad metal 13 so as to overlap the vent hole 9a. When an abnormality occurs, the ventilation hole 9a may be opened so that the gas may escape.

The clad metal 13 may be formed of a double layer metal body made of aluminum and copper.

In addition, the method of assembling a built-in battery pack for a mobile communication terminal according to the present invention, in a method of manufacturing a battery pack that is detachably mounted inside the mobile communication terminal to provide a rated voltage of the mobile communication terminal, clad metal Spot welding (13) to the vertical upper surface of the battery cell (9) by fusion welding (S11), and the bimetallic insert molding block (15) injected by insert molding the bimetal (5) and the nickel plate (6) Bonding to the battery cell 9 using a bond and spot welding the nickel plate 6 to the top can 9b, the negative electrode terminal (-) (S12), and on the underside of the PCM guide block 14 Applying and bonding the bond to the vertical upper surface of the battery cell 9 to which the clad metal 13, the bimetal insert molding block 15, and the negative electrode nickel plate 6 are attached (S13); , PCM soldered on both sides by the negative electrode nickel plate 4 and the positive electrode nickel plate 7 The assembly 3 is mounted on the upper surface of the PCM guide block 14, and the positive and negative nickel plates 4 and 7 of the PCM assembly 3 are spotted on the clad metal 13 and the bimetal 5, respectively. Welding (S14), and inserting the upper case block (2) into the PCM guide block (14) to be seated and fixed to a locker (Locker) standing on the surface of the PCM guide block (14); Attaching a test point label 1 to the upper case block 2 (S17), removing the outer surface of the double-sided tape 11 attached to the lower case 12, and lowering the lower portion of the battery cell 9. And attaching the surface (S20) and attaching the wrapping label 10 to the battery cell (S21).

In the following description of the preferred embodiments of the present invention in detail with reference to the accompanying drawings, when it is determined that the detailed description of the related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Do it.

Figure 3a to 3c is a perspective view of each type of the built-in battery pack for a mobile communication terminal according to the present invention, and shows a perspective view of a label type built-in battery pack, battery cell deformation type built-in battery pack, case insertion type built-in battery pack, respectively have.

The built-in battery pack for each type of FIGS. 3A to 3C has a basic configuration as shown in FIG. 4 and is manufactured by applying an upper case assembly method. 4 shows an exploded perspective view of a built-in battery pack to which the upper case assembly method according to the present invention is applied through a label type built-in battery pack, but such an internal configuration and an assembly method basically make a case body to form a battery cell ( 9) It is applicable to both the case insertion type internal battery pack for inserting the case and the battery cell deformation type internal battery pack in which the body of the battery cell 9 is deformed by standing the aluminum top can in a columnar shape on the vertical top.

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

Referring to FIG. 4, a built-in battery pack for a mobile communication terminal according to the present invention includes a test point label 1, an upper case block 2, a PCM assembly 3, a negative electrode nickel plate 4, a bimetal 5, Nickel plate (6), positive electrode nickel plate (7), bimetallic insert molding (8), battery cell (9), lapping label (10), double-sided tape (11), bottom case (12), clad metal (13), PCM guide block 14, bimetal insert molding block 15 is provided.

First, the positive electrode nickel plate 7 and the negative electrode nickel plate 4 are soldered in SMD type on both sides of one surface of the PCM assembly 3, and the soldered positive electrode nickel plate 7 and the negative electrode nickel plate 4 are battery cells. (9) is seated on the bimetal insert molding block 15, the clad metal 13 and the PCM guide block 14 integrated with the spot welding. After that, by inserting and fixing the upper case block 2, the battery cell 9 does not go through direct injection molding, so that the reliability and quality of the battery cell 9 can be expected and cost reduction can be expected. Can be.

The battery cell 9 is a lithium ion battery in which a positive terminal (+) and a negative terminal (−) are formed on a vertical upper surface to provide a rated voltage. In the battery cell 9, the PCM assembly 3 is disposed on a vertical upper surface where the positive terminal (+), the negative terminal (−), and the like are formed. In this case, a method in which the upper case block 2 covering the PCM assembly 3 is installed on the vertical upper surface of the battery cell 9 is applied, and a terminal 3a which is an external input / output terminal processed on one surface of the PCM assembly 3. ) Is exposed to the outside.

The positive electrode terminal (+), the negative electrode terminal (-), and the like are formed on the vertical upper surface of the battery cell 9, which is a side facing the PCM assembly 3. Among them, the clad metal 13 made of aluminum-nickel (Al-Ni) bonded to the outer can made of aluminum is spot-welded to the positive electrode terminal (+). In addition, the negative electrode terminal (-) is a protrusion-shaped terminal and is electrically isolated from the outer can by an insulator arranged around it.

On the other hand, the PCM assembly 3 is a resin plate body having a rectangular shape of substantially the same size as the vertical top surface of the battery cell 9, the terminal (3a; +,-, TX, VF, CF) and the like are formed by gold plating. The circuit part and the connection terminal are provided in the back surface in which the terminal 3a which is an external input / output terminal was formed. The circuit portion includes a protection circuit for protecting the battery cell 9 from overcharging and overdischarging during charging and discharging, or a semiconductor device whose electrical resistance increases rapidly when the temperature is increased by a surface-mounted PTC (barium titanate-based ceramics); Also known as static thermistors), or bimetals.

As shown in FIG. 4, a bimetal insert molding block 15 and a PCM guide block 14 which are injected by insert molding a bimetal 5 and a nickel plate 6 between the battery cell 9 and the PCM assembly 3. ) And the like are arranged. Here, the PCM guide block 14 has a bottom surface is machined to be securely seated in the battery cell (9), the upper side is a plurality of PCM lockers (14a) is set up to fix the PCM assembly (3) so as not to move It is structured.

The positive electrode nickel plate 7 and the negative electrode nickel plate 4 are both 'Z' shaped (or 'R' shaped or 'c' shaped) plate bodies made of nickel, and are soldered and attached to the PCM assembly 3. The upper case block 2 seated on the upper surface of the PCM assembly 3 to which the positive electrode nickel plate 7 and the negative electrode nickel plate 4 is attached is inserted into the PCM guide block 14 and fixed by the PCM locker 14a. At this time, the positive electrode nickel plate 7 and the negative electrode nickel plate 4 attached by the lead are used. The test point label 1 is a mark that changes color upon immersion so as to confirm consumer error, and the wrapping label 10 prints manufacturing information of the battery cell 9 and attaches it to the battery cell 9. It is to provide information, the lower case 12 is to serve to protect the battery cell 9 in case of falling and impact.

On the other hand, the battery cell deformation type built-in battery pack according to the present invention has the same basic internal configuration as the label-type built-in battery pack, so that the aluminum top can protrudes in the form of a column along the outline in the vertical upper surface of the battery cell (9). Using a rocker, rocker groove, clamper, etc. to fix the structure to secure the connection.

In the battery cell deformation type built-in battery pack, the aluminum top can is protruded by a predetermined length along the outline of the vertical upper surface where the positive terminal (+) and the negative terminal (-) of the battery cell 9 are formed, and the upper left and right sides thereof are formed. The locker groove is machined. Then, a locker is formed on the left and right surfaces of the upper case block 2 so that the upper case block 2 is pushed into the aluminum top can and inserted into the aluminum top can. The inner rocker groove is to be combined and fastened. At this time, by processing a plurality of clampers (Clamper) protruding to the upper end of the aluminum top can can be more firmly coupled by bending the protruding clampers after the upper case block (2) is seated inside.

In addition, the case insertion type internal battery pack has the same basic internal configuration as the label type internal battery pack, and forms a case body to surround both the battery cell 9 and the upper case block 2 attached to the battery cell 9. And, by using a rocker, rocker grooves, etc. to fix the structure firmly.

The case insertion type built-in battery pack attaches the upper case block 2 to the battery cell 9 and then pushes the penetrating case through the preformed case body so as to be fixed by a rocker. The case body is a hollow shape that surrounds the entire outer periphery of the battery cell 9, and covers and protects from the vertical lower surface to the vertical upper surface of the battery cell 9, and at the same time, the vertical upper surface of the battery cell 9. The upper case block 2 projects from the predetermined length enough to be inserted therefrom.

The rocker is machined on the left and right surfaces of the upper case block 2 and the left and right surfaces of the lower case 12, and the rocker grooves are processed on the upper and lower left and right inner surfaces of the case body, so that the upper case block 2 and the lower case 12 are processed. ) Is mounted on the upper and lower portions of the battery cell 9, the locker and the rocker groove can be coupled and fastened to secure the coupling.

5A is a front view of a PCM assembly having a structure capable of spot welding on both sides according to the present invention, and FIG. 5B is a state in which a positive electrode nickel plate and a negative electrode nickel plate are spot welded to a PCM assembly according to the present invention of FIG. 5A. Perspective view.

FIG. 5A shows a case where the PCM assembly 3 constituting the built-in battery pack for a mobile communication terminal according to the present invention is configured to allow spot welding on both sides. The PCM assembly 3 is formed of a resin plate body having a similar shape to a rectangle having the same size as the vertical top surface of the battery cell 9, and both edge portions of one surface of the battery cell 9 which are disposed opposite to the vertical top surface of the battery cell 9. In the welding pad, a 'Z' type negative electrode nickel plate 4 and a positive electrode nickel plate 7 are fixed by soldering (Soldering) to a welding pad with a surface mounted device (SMD). The other side which becomes the back surface comprises the terminal 3a which is the said external input / output terminal formed by gold-plating. In this state, the PCM assembly 3 is inserted into the PCM guide block 14 coupled with the battery cell 9 and fused by spot welding, and the upper case block 2 is closed to close the PCM locker mounted on the PCM guide block 14. Fix it with (14a). In this case, the structures of the positive electrode nickel plate 7 and the negative electrode nickel plate 4 may have various shapes such as 'a' shape and 'c' shape in addition to the 'Z' shape according to the position or use.

FIG. 6 is a perspective view of a spot welded to a bimetallic nickel plate according to the present invention, and FIG. 7 is a perspective view of a bimetal insert molding block according to the present invention.

As shown in FIGS. 6 and 7, the bimetal insertion molding block 15 is formed by insert molding a negative electrode nickel plate 4 connected to the bimetal 5 by spot welding using a polycarbonate (PC) or a PC (polyethylene) material. It has a combined form. In FIG. 6, the bimetal 5 and the nickel plate 6 may be connected by spot welding, or the lead of the bimetal 5 may be made long by a desired size. In FIG. 7, the bimetal 5 and the negative electrode nickel plate 4 connected by spot welding were inserted into a single bimetal insert molding block 15 to be integrated.

8A and 8B are an overall process diagram illustrating a method of assembling a built-in battery pack for a mobile communication terminal according to the present invention.

Looking at the assembly method of the built-in battery pack for a mobile communication terminal according to the present invention as follows. A bimetal insertion molding block 15 formed by forming a welding pad on both sides of one surface of the PCM assembly 3 by soldering the positive electrode nickel plate 7 and the negative electrode nickel plate 4, and inserting and molding the bimetal 5 is formed. After spot welding on the top can 9b which becomes the negative terminal (-) of the battery cell 9, the clad metal 13 is connected to the battery cell 9 by spot welding. In addition, the upper case block (2) is seated thereon and fixed through a vertical PCM locker (14M; PCM Locker), and after attaching the test point label (1) and the lower case (12) to the wrapping label (10) Wrap Many other similar variations are possible.

8A and 8B, the method of assembling the built-in battery pack for a mobile communication terminal according to the present invention is performed through the following steps.

1) Examining the battery cell 9 (S10)

2) welding the clad metal 13 to the battery cell 9 by spot welding (S11)

3) A bimetal insert molding block 15 ejected by insert molding the bimetal 5 and the nickel plate 6 is attached to the battery cell 9 using a bond, and the negative nickel plate 6 is attached to the negative terminal (-). Spot welding on the in-top can 9b (S12)

4) In the state of 3), by applying a bond to the bottom surface of the PCM guide block 14, seating and fixing to 3) (S13)

5) In the state of 4), the PCM assembly 3 with the nickel plate soldered on both sides is seated on the 4), and the positive electrode nickel plate 4 and the negative electrode nickel plate 7 of the PCM assembly 3 are bimetallic. Spot welding on (5) and the clad metal 13 (S14)

6) First functional test step (S15) to check the electrical characteristics

7) In the state of 5), by inserting the upper case block (2) in 5) to be seated and fixed to the locker (Locker) (S16)

8) attaching the test point label (1) in the state of 7) (S17)

9) Secondary functional test to check the electrical characteristics and electric length measurement (S18)

10) First visual inspection step (S19)

11) removing the outer surface of the double-sided tape (11) attached to the lower case 12 and attaching to the lower surface of the battery cell (9) (S20)

12) attaching the wrapping label 10 to the battery cell 9 (S21)

13) 2nd external inspection and packaging step (S22)

9 to 16 are diagrams illustrating respective steps shown in FIGS. 8A and 8B.

FIG. 9 shows the step S11 of welding the clad metal 13 to the battery cell 9 by spot welding. The operation of welding the clad metal 13 to the body of the battery cell 9 by spot welding is performed. Indicates. In the vertical upper surface of the battery cell 9, a vent hole 9a, a top can 9b serving as a negative terminal (-), and an electrolyte injection hole 9c are processed. Here, the clad metal 13 processes a hole in the center so that the vent hole 9a is opened to allow gas to escape when an abnormality of the battery cell 9 occurs. In addition, the clad metal 13 is a double layer metal body made of aluminum and copper for fusion welding of the positive electrode nickel plate 7 and the negative electrode nickel plate 4 of the battery cell 9 and the PCM assembly 3 by spot welding. .

FIG. 10 shows that the bimetal insert molding block 15 ejected by insert molding the bimetal 5 and the nickel plate 6 is attached to the battery cell 9 using a bond, and the negative nickel plate 6 is attached to the negative electrode terminal (−). (S12) shows spot welding on the top can 9b. A bond is applied to the bottom surface of the bimetal insertion molding block 15 to be seated on the side of the top can 9b which is the negative terminal (-) of the battery cell 9, and the nickel plate 6 and the top can 9b of the battery cell 9 are placed thereon. The process of spot welding and fixing is shown.

FIG. 11 illustrates a step S13 of applying and bonding a bond to the bottom surface of the PCM guide block 14. In the state of FIG. 10, a process of applying a bond to the bottom surface of the PCM guide block 14 and then attaching the bond to the battery cell 9 and the PCM guide block 14 is described. Here, the PCM guide block 14 is formed so that the hole (Hole) is drilled on both sides to spot weld the PCM assembly (3) so that the bimetal insert molding block 15 and the clad metal 13 are visible, the bottom is bimetal insert The injection molding of the PCM guide block 14 is made by processing the molding block 15 and the clad metal 13 in consideration of the bending. In addition, six PCM lockers 14a are arranged on the upper surface to fix the upper case block 2 so as not to move. The number of PCM rockers 14a can be adjusted according to the fixing strength.

FIG. 12 shows a PCM assembly 3 in which nickel plates are soldered on both sides, and the positive electrode nickel plate 4 and the negative electrode nickel plate 7 of the PCM assembly 3 are bimetal 5 and the clad metal 13. The spot welding step (S14) is shown. After mounting the PCM assembly 3 to the battery cell 9 in the assembled state of FIG. 11, the positive electrode nickel plate 7 and the negative electrode nickel plate 4 on both sides of the PCM assembly 3 are respectively bimetal 5 and clad metal. The process of fusion | melting and fixing to (13) by spot welding is shown.

FIG. 13 illustrates a step S16 of inserting and seating the upper case block 2 to fix it to a locker. In the assembled state of Fig. 12, the upper case block 2 is pushed into the PCM locker 14a of the PCM guide block 14 to fix it. The upper case block 2 has a test point 2a to which a test point label 1 is attached later, a locking hole 2b, a terminal hole 2c which overlaps the position of the terminal 3a of the PCM assembly 3. Terminal hole).

FIG. 14 shows the step S17 of attaching the test point label 1 and shows the process of attaching the test point label 1 at the test point 2a position.

FIG. 15 illustrates a step S20 of removing the outer surface of the double-sided tape 11 attached to the lower case 12 and attaching the lower surface of the battery cell 9 to the lower surface of the battery cell 9. The process of attaching the lower case 12 to which the double-sided tape 11 is attached is shown.

FIG. 16 shows the step S21 of attaching the wrapping label 10 to the battery cell 9, to wrap the battery cell 9 using the printed wrapping label 10 in the assembled state of FIG. 15. The process of sticking is shown.

The present invention may be modified in various ways without departing from the basic concept according to the needs of those skilled in the art.

As described above, according to the present invention, there is provided a new type of built-in battery pack for a mobile communication terminal and a method of assembling which can solve various manufacturing difficulties that have been inevitably generated and can shorten the work process required for assembly. Is provided.

In addition, according to the present invention, by reducing the number of parts of the raw and subsidiary materials, it is possible to increase productivity through cost reduction and manufacturing process improvement, and in the event of a failure, the mobile communication terminal dramatically increases the contribution of the major components such as battery cell and PCM assembly. Provided is a built-in battery pack and a method of assembling the same.

In addition, according to the present invention, there is provided a built-in battery pack and a method for assembling the mobile communication terminal to ensure the reliability of the battery cell is not subjected to the process of injection molding the battery cell directly.

1 is an exploded perspective view of a battery pack is disassembled in a conventional mobile communication terminal provided with a built-in battery pack.

Figure 2a to 2c is a perspective view of the type of conventional built-in battery pack.

Figure 3a to 3c is a perspective view of each type of the built-in battery pack for a mobile communication terminal according to the present invention.

Figure 4 is an exploded perspective view of a built-in battery pack for a mobile communication terminal according to the present invention.

Figure 5a is a front view of a PCM assembly having a structure capable of both spot welding (spot welding) according to the present invention.

5B is a perspective view of a spot-welded state of the positive electrode nickel plate and the negative electrode nickel plate in the PCM assembly according to the present invention of FIG. 5A.

Figure 6 is a perspective view of the spot welding the nickel plate on the bimetal according to the present invention.

7 is a perspective view of a bimetallic insert molding block according to the present invention.

8A and 8B are an overall process diagram showing a method of assembling a built-in battery pack for a mobile communication terminal according to the present invention.

9-16 illustrate each of the steps shown in FIGS. 8A and 8B.

Explanation of symbols on main parts of drawing

1: Test Point Label

2: top case block

3: Protection Circuit Module Assembly

4: negative electrode nickel plate (-Ni-Plate) 5: bimetal (Bimetal)

6: Nickel Plate (Ni-Plate)

7: positive electrode nickel plate (+ Ni-Plate)

8: Bimetal insert molding

9: Battery cell 10: Wrapping Label

11: double sided tape 12: bottom case

13: clad metal 14: PCM guide block

15: Bimetal insert molding block

Claims (7)

In the battery pack detachably mounted inside the mobile communication terminal to provide a rated voltage of the mobile communication terminal, A battery cell 9 having a positive terminal (+) and a negative terminal (−) formed on a vertical upper surface to provide a rated voltage; A clad metal 13 which is a rectangular plate body having a hole formed in the center thereof and is spot welded to a positive electrode terminal (+) on one side of a vertical upper surface of the battery cell 9 to be fused; A bimetal insertion molding block 15 inserted into the bimetal 5 and a nickel plate 6 attached to one vertical surface of the bimetal 5 to be ejected and attached to the vertical upper surface of the battery cell 9; Holes are formed at both sides of the PCM guide block 14 bonded to the vertical upper surface of the battery cell (9) to which the clad metal (13), the bimetal insertion molding block 15 is attached; The negative electrode nickel plate 4 and the positive electrode nickel plate 7 are soldered on both sides of one surface thereof, and are mounted on the upper surface of the PCM guide block 14 so that the positive electrode nickel plate 7 is the clad metal 13. The negative electrode nickel plate 4 may include a PCM assembly 3 spot-welded to the bimetal 5, respectively; The upper case block (2) is seated in the state fitted to the PCM guide block 14 is fixed by a locker (Locker) standing on the surface of the PCM guide block 14; characterized in that it comprises a Built-in battery pack. The method of claim 1, In the battery cell 9, an aluminum top can is formed by a predetermined length along the outline of the vertical upper surface where the positive terminal (+) and the negative terminal (−) are formed to deform the body of the battery cell 9. The built-in battery pack for a mobile communication terminal, characterized in that the upper case block (2) is configured to be pushed into the inside of the aluminum top can erected on the battery cell (9). The method of claim 1, A case body is formed to surround both the battery cell 9 and the upper case block 2 attached to the battery cell 9 so that the upper case block 2 is replaced by the battery cell 9. The built-in battery pack for a mobile communication terminal, characterized in that configured to be pushed and fixed to penetrate through the case body (Case body) pre-molded after attaching to. The method of claim 1, The lower case 12 is attached to the lower part of the battery cell 9 using a double-sided tape 11, and a test point 2a is processed at the center of the vertical upper surface of the upper case block 2 so that a test point label ( 1) is attached, the battery cell 9, the clad metal 13, the bimetal insert molding block 15, the PCM guide block 14, the PCM assembly 3, the upper case block (2) The built-in battery pack for a mobile communication terminal, characterized in that the wrapping label 10 is wrapped to protect the whole. The method of claim 1, The vent hole 9a is processed at one side of the vertical upper surface of the battery cell 9, and a hole is attached to the center of the clad metal 13 so as to overlap the vent hole 9a. The built-in battery pack for a mobile communication terminal, characterized in that configured to allow the gas (Gas) to escape when the vent hole (9a) is opened. The method of claim 1, The clad metal 13 is a built-in battery pack for a mobile communication terminal, characterized in that the two-layer metal body made of aluminum and copper. In the method for manufacturing a battery pack detachably mounted inside the mobile communication terminal providing a rated voltage of the mobile communication terminal, Welding the clad metal 13 to the vertical upper surface of the battery cell 9 by fusion welding (S11); A bimetal (5) and a nickel plate (6) is inserted into the injection molding bimetal insert molding block 15 is bonded to the battery cell (9) using a bond and the nickel plate 6 is a negative electrode (-) top can (9b; spot welding to Top can) (S12); Bonding is applied to the bottom surface of the PCM guide block 14 to the vertical top surface of the battery cell 9 to which the clad metal 13, the bimetal insert molding block 15, and the negative electrode nickel plate 6 are attached. Mounting and fixing (S13); A PCM assembly 3 having soldered negative electrode nickel plate 4 and a positive electrode nickel plate 7 on both sides is seated on the upper surface of the PCM guide block 14, and the positive and negative electrode nickel of the PCM assembly 3 is seated. Spot welding the plates (4, 7) to the clad metal (13) and the bimetal (5), respectively (S14); Inserting an upper case block (2) into the PCM guide block (14) and seating it to be fixed to a locker (Locker) standing on the surface of the PCM guide block (14) (S16); Attaching a test point label (1) on an upper surface of the upper case block (S17); Removing the outer surface of the double-sided tape (11) attached to the lower case (12) and attaching it to the lower surface of the battery cell (S20); Attaching a wrapping label (10) to the battery cell (9) (S21); Assembly method of a built-in battery pack for a mobile communication terminal comprising a.