KR100704290B1 - Battery pack - Google Patents

Abstract

Disclosed is a battery pack that can be easily manufactured, downsized and thinned, and can reliably protect a protection circuit module. The battery pack supplies charged power and has a battery cell having a negative terminal and a positive terminal at the top, a protection circuit module installed at the top of the battery cell and electrically connected to the negative and positive terminals respectively via a terminal plate, and protected at the top. A protective circuit case mounted on the upper part of the battery cell with the circuit module housed therein, an upper cover coupled to the upper part of the battery cell in such a way as to cover the protective circuit case and the upper part of the battery cell, the periphery of the battery cell and the upper cover A folding binding member for binding the upper cover, the upper cover, the battery cell, includes an adhesive tape bonded to the outer surface of the folding binding member.

Description

Battery pack {BATTERY PACK}

1 is an exploded perspective view showing the configuration of a battery pack according to the present invention.

2 is a cross-sectional view showing the configuration of a battery pack according to the present invention.

3 is a perspective view showing a state in which a folding binding member of the battery pack according to the present invention is mounted.

Figure 4 is a perspective view showing an example of mounting the adhesive tape of the battery pack according to the present invention.

Explanation of symbols on the main parts of the drawings

10: battery cell, 11: negative terminal,

12: positive terminal, 20: protective circuit module,

21: cathode terminal plate, 22: anode terminal plate,

30: protective circuit case, 31: upper receiving space,

32: lower housing space, 40: upper cover,

50: folding binding member, 51: upper support portion,

52: first side end support portion, 53: lower support portion,

54: second side end support portion, 54a: locking groove,

55: third side end supporting portion, 55a: locking projection,

56, 57: wing, 58: bending groove,

59: opening, 60: adhesive tape.

The present invention relates to a rechargeable battery pack for use in a mobile phone or a mobile device, and more particularly, to a battery pack capable of miniaturizing a volume and facilitating manufacturing.

 A battery pack used as a power source for a mobile device such as a cell phone or a PDA is configured through a combination of a battery cell and a protection circuit module (PCM).

A typical battery cell has a form in which an electrode laminated unit consisting of a positive electrode sheet and a negative electrode sheet is accommodated in a metal casing, and a positive electrode terminal and a negative electrode terminal are provided on an outer surface of the casing. The protection circuit module is installed outside the battery cell to prevent the risk of explosion and overcharge of the battery. That is, the battery pack is a form in which the battery cell and the protection circuit module are coupled to each other and packaged in a unit form. Such battery packs are required to be smaller, thinner, and lighter according to the trend toward miniaturization and light weight of mobile phones, PDAs, and the like that use them.

Japanese Laid-Open Patent Publication No. 2002-334686 discloses an example of such a battery pack. The battery pack has a battery cell, a protective circuit board (protective circuit module) mounted on the side of the battery cell, and an electrode terminal for electrically connecting the battery cell and the protective circuit board. In addition, the protective circuit board and the electrode terminal are fixed to the battery cell integrally by the mold molding portion.

However, such a battery pack has a problem in that it is difficult to manufacture a battery pack since the protection circuit board and the electrode terminal are fixed to the battery cell through a molding part through injection of a resin material. In addition, in this manufacturing method, if a melt flow occurs during molding of the mold molding part, cracks or pin holes are formed in the mold molding part, and thus the strength of the mold molding part is weakened. The molded part could easily be broken, so the protection circuit board could not be securely protected.

In addition, since the battery pack has a circuit board and an electrode terminal disposed on the side of the battery cell, and a mold molding part is wrapped around the battery pack, the battery pack has a large width and has a limitation in miniaturizing the volume.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems, and an object of the present invention is to provide a battery pack which can reduce the volume and facilitate the manufacture.

Another object of the present invention is to provide a battery pack which can be miniaturized and reduced in thickness while being able to reliably protect the protection circuit module from impact.

The battery pack according to the present invention for achieving the above object is to supply a charged power and the battery cell having a negative terminal and a positive terminal on the top, and installed on top of the battery cell and through the terminal plate and the negative and positive terminal, respectively A protective circuit module electrically connected to the protective circuit module; and a protective circuit case mounted on the battery cell in a state in which the protective circuit module is accommodated thereon; and a portion of the upper portion of the protective circuit case and the battery cell. And an upper cover coupled to an upper portion, a folding binding member for binding the periphery of the battery cell and the upper cover, and an adhesive tape adhered to an outer surface of the upper cover, the battery cell, and the folding binding member. do.

The foldable binding member may further include an upper support part supporting an upper end of the upper cover, a first side end support part connected to one end of the upper support part so as to be able to support one side end of the upper cover and the battery cell, and A lower end supporting part refractoryly connected to a first side end supporting part and supporting a lower end of the battery cell, a second side end supporting part refractoryly connected to the lower supporting part and supporting the other side end of the battery cell; It is characterized in that it comprises a third side end support that is refractably connected to the other end of the upper support and connected to the second side end support.

In addition, the foldable binding member further comprises wings that are refractively connected to both sides of the upper support to cover both sides of the upper cover.

In addition, the end of the second and third side end support portion is characterized in that the engaging projection and the engaging groove for the interconnection is provided.

In addition, a plurality of output terminals are provided on the upper surface of the protection circuit module through metal plating, and openings are formed in the upper cover and the upper support to expose the plurality of output terminals at positions corresponding to the plurality of output terminals. Characterized in that formed.

In addition, the protective circuit case and the upper cover is characterized in that the resin material is provided to enable insulation.

In addition, the bent groove is formed in the refractive portion of the foldable binding member.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, the battery pack according to the present invention, the chargeable battery cell 10, the protection circuit module 20, the protection circuit module 20 for the protection of the battery cell 10, It includes a protective circuit case 30, an upper cover 40, a foldable binding member 50, and an adhesive tape 60 adhered to the outside.

Although not shown in the drawings, the battery cell 10 is formed in a form in which an electrode laminated unit consisting of a positive electrode sheet and a negative electrode sheet is accommodated in a metal casing. The battery cell 10 includes a negative electrode terminal 11 protruding from the upper center portion, and is configured such that the entire outer surface of the casing except the negative electrode terminal 11 forms the positive electrode terminal 12.

The protection circuit module 20 is a circuit board for protecting the battery cell 10 from explosion and overcharge risks. The protective circuit module 20 is connected to the negative terminal 11 of the battery cell 10 through the negative terminal plate 21, and connected to the positive terminal 12 on the top of the battery cell 10 through the positive terminal plate 22. do. The negative electrode and positive electrode terminal plates 21 and 22 are for power connection and are provided through bending molding of copper or nickel plates. The negative electrode and the positive electrode terminal plates 21 and 22 have a predetermined elasticity and are closely connected to the protective circuit module 20 and the terminals 11 and 12 of the battery cell 10 or to perform spot welding on the battery cell 10 side. Can be connected via.

The protective circuit case 30 includes an upper accommodating space 31 corresponding to an outer shape of the protective circuit module 20 to accommodate the protective circuit module 20 without shaking. In addition, the protection circuit case 30 has a cross-sectional area corresponding to the area of the upper end of the battery cell 10 so that it can be stably coupled to the upper part of the battery cell 10, the lower part of the negative electrode and the positive electrode terminal plates (21, 22) and the battery A lower accommodating space 32 capable of accommodating the negative electrode terminal 11 of the cell 10 is provided. This accommodates the cathode and anode terminal plates 21 and 22 therein through the lower accommodation space 32 to support them without shaking, and at the same time, the lower circumference of the protective circuit case 30 is closely coupled to the upper end of the battery cell 10. I would have to. In addition, the protective circuit case 30 is provided through injection molding of a resin material that can be electrically insulated, the negative electrode extending from the battery cell 10 side toward the protective circuit module 20 on one side of the protective circuit case 30. And support grooves 33 and 34 for receiving and supporting a part of the anode terminal plates 21 and 22.

The protective circuit case 30 couples the negative and positive terminal plates 21 and 22 to the support grooves 33 and 34, and mounts the protective circuit module 20 in the upper accommodating space 31. 10) to be mounted on the top. When the protective circuit case 30 is installed in this way, the protective circuit module 20 is accommodated in the upper portion of the protective circuit case 30, and the negative and positive terminal plates 21 and 22 are also bound to the correct positions, thereby protecting. The power supply connection between the protection circuit module 20 and the battery cell 10 is accurately made by simply mounting the circuit case 30 on the battery cell 10. In addition, since the protective circuit case 30 is an insulating material, it is possible to prevent an electrical short (short) without using a separate insulating sheet or the like, to accommodate the protective circuit module 20 in the upper accommodation space (31). Therefore, the protection circuit module 20 can be reliably protected from external shocks and the like.

The upper cover 40 is coupled to the upper portion of the battery cell 10 in such a manner as to cover the protective circuit case 30 accommodating the protective circuit module 20 and the upper portion of the battery cell 10. The upper cover 40 is to allow the protective circuit case 30 to be coupled to the upper part of the battery cell 10 through easy coupling, the protective circuit module 20, the protective circuit case 30, the negative electrode and the positive terminal plate The protection circuit module 20 can be more stably protected by allowing 21 and 22 to be completely accommodated in the upper cover 40 and preventing their shaking.

1 and 3, the foldable binding member 50 has a top cover 40 mounted on the top of the battery cell 10, and then the circumference of the battery cell 10 and the circumference of the top cover 40. By binding, the upper cover 40 may be fixed to the upper part of the battery cell 10. The foldable binding member 50 is refractorily connected to one end of the upper support part 51 and the upper support part 51 supporting the upper end of the upper cover 40, and one side of the upper cover 40 and the battery cell 10. Refractively connected to the first side end support 52, the first side end support 52 supporting the side ends, and the bottom support 53 and the bottom support 53 supporting the bottom of the battery cell 10. The second side end support portion 54, which is connected to the other end of the battery cell 10, and is deflectably connected to the other end of the upper support portion 51, and connected to the second side end support portion 54. The third side end support part 55 is provided. In addition, wing portions 56 and 57 are connected to both sides of the upper support portion 51 so as to be able to cover both sides of the upper cover 40.

In addition, at the end of the third side end support portion 55, a locking protrusion 55a for connection with the second side end support portion 54 is formed, and at the end of the second side end support portion 54, a locking protrusion 55a and The engaging groove 54a to be coupled is formed. This is to be installed in the form of winding the periphery of the battery cell 10 and the upper cover 40 so that it can be engaged through the locking projection (55a) and the locking groove (54a). The locking protrusion 55a and the locking groove 54a form a dovetail-type coupling in which a step does not occur on the surface after the coupling. In addition, each bent portion of the foldable binding member 50 is formed with a notch (Notch) bending groove 58 so that easy refraction can be made.

As shown in FIG. 3, since the foldable binding member 50 is bound in a form surrounding the circumference of the battery cell 10 and the circumference of the upper cover 40, the circumferential and lower edge portions of the battery cell 10, The periphery and the upper edge portion of the upper cover 40 can be reinforced. Therefore, the battery pack can be protected even when an external shock (especially a drop of the battery pack) is applied to the battery pack. In addition, since the foldable binding member 50 is formed to bind the circumference, the battery pack can be miniaturized, thinned, and lightweight. The foldable binding member 50 may be made of a thin plate shape having a predetermined rigidity in order to reduce the volume, and may be made of a resin material that can be insulated to prevent electrical short.

In addition, as shown in FIG. 1, a plurality of output terminal portions 24 are provided on the upper surface of the protection circuit module 20 through gold plating, and the upper cover 40 corresponds to the plurality of output terminal portions 24. Openings 44 are formed so that the plurality of output terminal portions 24 are exposed at the positions. The opening 59 is also formed at the same position in the upper support portion 51 of the foldable binding member 50. This allows the output terminal 24 of the protection circuit module 20 to be exposed to the outside through the openings 44 and 59 when the upper cover 40 and the foldable binding member 50 are coupled to each other. The connection was made.

Adhesive tape (60, label tape), as shown in Figure 4, after the upper cover 40 and the foldable binding member 50 is combined in the form of finally wrapped around the outer cover 40, foldable binding The member 50 and the battery cell 10 function to strengthen the binding of the outer surface.

Next, a method of assembling a battery pack according to the present invention will be described.

When assembling the battery pack, the protective circuit module 20 and the negative and positive terminal plates 21 and 22 are coupled to the protective circuit case 30. The protective circuit case 30 is positioned above the battery cell 10, and the upper cover 40 is coupled. At this time, since the protective circuit module 20 is accommodated in the protective circuit case 30 and the protective circuit case 30 is accommodated in the upper cover 40 again, it is stably protected. In addition, the protection circuit module 20, the protection circuit case 30, the negative electrode and the positive electrode terminal plates (21, 22) are mounted in the correct position without shaking, and the battery cell (10) and the protection circuit module (20) are electrically connected. Is connected.

After the upper cover 40 is coupled, as shown in FIG. 3, the upper cover 40 and the battery cell 10 are coupled through the folding binding member 50. And after binding the upper cover 40 with the foldable binding member 50, as shown in Figure 4, the assembly is finally completed by attaching the adhesive tape 60.

As described in detail above, the battery pack according to the present invention is equipped with a protective circuit module and a negative electrode and a positive terminal plate on the protective circuit case and placed on the upper part of the battery cell to couple the top cover and the folding binding member to the battery cell, respectively. This enables the battery pack to be manufactured easily and maintains stable quality because most of the assembly procedures can be completed. In addition, since the manufacturing process is simple, assembly labor can be reduced, thereby reducing manufacturing costs and increasing productivity.

In addition, the battery pack according to the present invention is coupled to the upper part of the battery cell in a state in which the protective circuit module is accommodated in the protective circuit case, since the protective circuit case is completely accommodated in the upper cover, it can reliably protect the protective circuit module from external impacts. It has an effect.

In addition, since the battery pack according to the present invention is installed in a form in which the folding binding member surrounds the upper cover and the circumference of the battery cell, the battery pack can not only reinforce the circumference and the corner part that are vulnerable to external shocks (especially the drop of the battery pack). The pack can be made smaller, thinner, and lighter.

Claims (7)

delete delete A battery cell that supplies charged power and has a negative terminal and a positive terminal at the top, A protection circuit module installed on an upper portion of the battery cell and electrically connected to the negative and positive terminals, respectively, through a terminal plate; A protective circuit case mounted on the battery cell in a state in which the protective circuit module is accommodated in an upper portion thereof; An upper cover coupled to an upper portion of the battery cell in such a manner as to cover the protective circuit case and a part of an upper end of the battery cell; A folding binding member for binding a circumference of the battery cell and a circumference of the upper cover; An adhesive tape adhered to an outer surface of the upper cover, the battery cell, and the folding binding member, The folding binding member and the upper support portion for supporting the upper end of the upper cover, A first side end support part refractorly connected to one end of the top support part and supporting one side end of the top cover and the battery cell; A lower support part refractedly connected to the first side end support part and supporting a lower end of the battery cell; A second side end support part refractorily connected to the bottom support part and supporting the other side end of the battery cell; A third side end support part connected to the other end of the upper support part in a refractive manner and connected to the second side end support part; Comprising a wing portion refractored connected to both sides of the upper support portion to cover both sides of the upper cover, Battery pack. The method of claim 3, Ends of the second and third side end support portions are provided with a locking projection and a locking groove for interconnection, Battery pack. The method of claim 3, A plurality of output terminals are provided on the upper surface of the protection circuit module through metal plating, Openings are formed in the upper cover and the upper support part to open the plurality of output terminal parts at positions corresponding to the plurality of output terminal parts. Battery pack. The method of claim 3, The protective circuit case and the upper cover is provided with a resin material to enable insulation, Battery pack. The method of claim 3, The bending portion is formed in the refractive portion of the foldable binding member, Battery pack.

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