KR20110023986A - Battery pack - Google Patents

Abstract

PURPOSE: A battery pack is provided to reduce the whole height of the battery pack, to facilitate the assembly of a battery cell, cell gap, protection circuit module, and upper case, and to simplify a manufacturing process of the battery pack. CONSTITUTION: A battery pack includes: a battery cell(10) which includes positive and negative electrode terminals and supplies the charged power; a protection circuit module(20) which includes circuit patterns and semiconductor device and prevents overcharging or overdischarging of the battery cell; a cell cap(30) for electrically connecting the positive and negative electrode terminals with the protection circuit module; an upper case(40) which accommodates the protection circuit module and the upper case and is combined with the upper part of the battery cell; and a lower case(50) combined with the lower part of the battery cell.

Description

Battery Pack {BATTERY PACK}

The present invention relates to a battery pack, and more particularly, to simplify the structure of connecting the battery cell and the protection circuit module, and to form a space for accommodating the semiconductor elements mounted on the protection circuit module to reduce the overall height of the battery pack. The present invention relates to a battery pack capable of reducing production costs.

In general, an inner battery pack used as a power source of a portable communication terminal has a structure in which a battery cell and a protection circuit module (PCM) are combined.

Here, the battery cell is 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 the positive electrode terminal and the negative electrode terminal are provided on the outer surface of the casing.

In addition, the protection circuit module is installed outside the battery cell to prevent the risk of explosion and overcharge of the battery.

In other words, the battery pack has a structure in which a battery cell and a protection circuit module are coupled to each other and packaged in a unit form, and such a battery pack has become smaller, thinner, and lighter according to the trend of miniaturization and light weight of a portable communication terminal using the same. It is required.

1 is an exploded perspective view of a battery pack according to the prior art.

Referring to FIG. 1, a battery pack according to the related art includes a battery cell 110 including a positive electrode terminal 113 and a negative electrode terminal 111, a protection circuit module 120 including various semiconductor elements, and A holder 130 for supporting the protective circuit module 120, a positive terminal plate 150 and a negative terminal plate for electrically connecting the positive terminal 113 and the negative terminal 111 to the protective circuit module 120 140 and the connection plate 160, the battery cell 110, the protection circuit module 120, the holder 130 and the angular pole terminal plate, the upper case 100 and the battery containing a waterproof tape The lower case 200 covers the lower part of the cell 110 and the cover tape 170 covers the outer surface of the battery cell 110.

Here, the holder 130 supports the protective circuit module 120 and electrically connects the positive terminal 113 and the negative terminal 111 of the battery cell 110 with the protective circuit module 120. It is provided to accommodate the angular pole terminal plate and the connection plate 160.

In the above configuration, the battery pack is completed by combining the upper and lower cases 100 and 200 and the cover tape 170 while the battery cell 110 and the protection circuit module 120 are connected to each other.

However, in the above-described conventional battery pack, the pole terminal plates 140 and 150 and the connection plate 160 and the holder 130 which electrically connect the pole terminals 111 and 113 to the protection circuit module 120. Since the should be mounted on the battery pack upper surface there was a problem that the length of the entire battery pack is increased.

In addition, when the protection circuit module 120, the polar terminal terminal 140, 150 and the connection plate 160, the connection between the components must be implemented by spot welding or laser welding to increase the manufacturing process and production cost There was an increasing problem.

The present invention has been made to solve the above problems, an object of the present invention, by providing a cell cap that facilitates the connection between the amount of battery cells, the negative terminal and the protection circuit module, the overall height of the battery pack It is to provide a battery pack that can reduce the.

Still another object of the present invention is to easily implement the assembly of the battery cell, cell cap, protective circuit module, the upper case, to provide a battery pack that can reduce the production cost of the battery pack by simplifying the manufacturing process of the battery pack. There is.

Still another object of the present invention is to provide a battery pack which can easily replace a component in which a failure occurs and reduce a replacement cost when a failure occurs in any one of the components of the battery pack.

According to the present invention, a battery cell including a positive terminal and a negative terminal, and supplies a charged power; A protection circuit module including a circuit pattern and a semiconductor element, for preventing overcharging or overdischarging of the battery cell; A cell cap for electrically connecting the positive terminal and the negative terminal to the protective circuit module; An upper case provided to receive the protection circuit module and the cell cap and coupled to an upper portion of the battery cell; And a lower case coupled to a lower portion of the battery cell, wherein the cell cap electrically connects the plate corresponding to the upper portion of the battery cell and the positive terminal and the negative terminal to one side and the other side of the plate, respectively. It can be achieved by a battery pack including a positive connection terminal and a negative connection terminal protruding upward.

Here, the protective circuit module may be formed with a positive electrode connection opening and a negative electrode connection opening into which the positive and negative connection terminals are inserted, respectively.

In addition, the positive electrode connection opening and the negative electrode connection opening are plated on an inner circumferential surface to electrically connect the positive electrode connection terminal and the negative electrode connection terminal.

Here, the positive electrode connection terminal may be provided with a positive electrode supporting jaw for supporting the protective circuit module and the cell cap and the protective circuit module at a predetermined distance and inserted into the positive electrode connecting opening.

The negative electrode connection terminal may be provided with a negative electrode support jaw for supporting the protective circuit module and spaced apart from the cell cap and the protective circuit module by a predetermined distance and inserted into the negative electrode connection opening.

Here, the anode support jaw and the cathode support jaw are formed at the same height, and the anode connection portion and the cathode connection portion may be provided with a smaller area than the area of the anode support jaw and the cathode support jaw.

In addition, the positive electrode connection portion and the negative electrode connection portion has a constant slope, the cross-sectional area may increase as it goes downward.

On the other hand, the cell cap is mounted on top of the battery cell, it is possible to join the mutual bonding surface by laser welding.

Here, the cell cap may form one or more protrusions protruding in the longitudinal direction of the plate in order to maintain a fastening force with the upper case.

Here, the upper case may include a case coupling portion coupled to correspond to the protrusion, and the case coupling portion may have a coupling groove formed at a portion corresponding to the protrusion.

According to the present invention, it is possible to easily implement the connection between the amount of battery cells, the negative terminal and the protection circuit module, and at the same time reduce the overall height of the battery pack.

In addition, the assembly of the battery cell, the cell cap, the protective circuit module, the upper case can be easily implemented, and the production cost of the battery pack can be reduced by simplifying the manufacturing process of the battery pack.

In addition, when a failure occurs in any one of the components of the battery pack, it is easy to replace the defective component, it is possible to reduce the replacement cost.

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

Prior to this, terms used in the present specification and claims should not be construed in a dictionary meaning, and the inventors may properly define the concept of terms in order to explain their invention in the best way. It should be construed as meaning and concept consistent with the technical spirit of the present invention.

Accordingly, the configuration shown in the embodiments and drawings described herein is only a preferred embodiment of the present invention, and does not represent all of the technical spirit of the present invention, various modifications that can be replaced at the time of the present application It should be understood that equivalents and variations may exist.

2 is an exploded perspective view of a battery pack according to the present invention, Figure 3 is a combined perspective view of a battery pack according to the present invention, Figure 4 is a cross-sectional view of the battery pack according to the present invention.

2 to 4, a battery pack according to the present invention includes a battery cell 10 including a positive electrode terminal 11 and a negative electrode terminal 13 and supplying charged power; A protection circuit module 20 including a circuit pattern and a semiconductor element 25 to prevent overcharge or overdischarge of the battery cell 10; A cell cap 30 for electrically connecting the positive terminal 11 and the negative terminal 13 to the protection circuit module 20; An upper case 40 provided to accommodate the protection circuit module 20 and the cell cap 30 and coupled to an upper portion of the battery cell 10; A lower case 50 coupled to a lower portion of the battery cell 10, wherein the cell cap 30 includes a plate 35 corresponding to an upper portion of the battery cell 10, and the present plate 35. The positive electrode terminal 11 and the negative electrode terminal 13 are electrically connected to one side and the other side, respectively, and include a positive connection terminal 31 and a negative connection terminal 33 protruding upward.

As shown in FIG. 2, a battery pack according to the present invention basically includes a battery cell 10, a protection circuit module 20, a cell cap 30, an upper case 40, a lower case 50, and the like. do.

2 to 4, the battery cell 10 of the present invention is provided with a positive electrode terminal 11 and a negative electrode terminal 13 thereon, the battery cell 10 is composed of a negative electrode sheet and a positive electrode sheet The electrode stacking unit may be provided in a form accommodated in the metal casing.

Here, the battery cell 10 may be provided in various kinds.

That is, it may be provided as a nickel-cadmium battery, a nickel-hydrogen battery or a lithium ion battery.

Preferably, the battery cell 10 is capable of charging a large voltage compared to the size compared to other batteries, and the power supply is sustainable for a long time after charging, consisting of a single battery as a convenient lithium ion Can be prepared.

The battery cell 10 is provided such that the positive electrode terminal 11 and the negative electrode terminal 13 and the cell cap 30 provided on the top of the battery cell 10 are coupled to each other.

Here, the cell cap 30 electrically connects the positive and negative terminals 11 and 13 of the battery cell 10 and a protection circuit module (PCM) 20 to be described later. As a component provided to support the module 20, the plate 35 is coupled to the upper surface of the battery cell 10 and the positive and negative terminals 11 and 13, respectively, A positive connection terminal 31 and a negative connection terminal 33 protruding upward from one side and the other side of the plate 35 is included.

Here, the plate 35 and the positive electrode connection terminal 31 may be made of aluminum or an aluminum alloy, the negative electrode connection terminal 33 may be made of nickel, and the cell cap 30 is the battery cell Mounted on top of 10, the mutual joining surfaces are joined by laser welding.

On the other hand, the protection circuit module 20 is provided to prevent overcharge or over-discharge of the battery cell 10, to prevent the explosion of the battery cell 10, to prevent the inflow of overcurrent, or to the battery cell ( It is provided to block a short circuit between the positive electrode terminal 11 and the negative electrode terminal 13 provided in 10).

That is, the protection circuit module 20 is connected to the battery cell 10 during operation to ensure safety from the risk of explosion of the battery cell 10, etc., and the service life of the battery cell 10 It extends.

Here, the protective circuit module 20 has a positive electrode connection opening 21 and a negative electrode whose inner circumferential surface is plated so as to electrically connect the positive electrode terminal 31 and the negative electrode terminal 33 of the cell cap 30, respectively. The connection opening 23 can be formed.

That is, the positive electrode connecting terminal 31 and the negative electrode connecting terminal 33 are inserted into the positive electrode connecting opening 21 and the negative electrode connecting opening 23 to electrically connect the battery cell 10 and the protection circuit module 20. Can be connected.

Here, the positive electrode connection terminal 31 supports the protective circuit module 20 and the positive electrode support jaw 32 and the positive electrode connection for separating the cell cap 30 and the protective circuit module 20 by a predetermined distance. It may be provided with a positive electrode connecting portion 34 inserted into the opening 21.

In addition, the negative electrode connection terminal 33 supports the protective circuit module 20, and the negative electrode support jaw 36 and the negative electrode connection for separating the cell cap 30 and the protective circuit module 20 by a predetermined distance. It may be provided with a cathode connecting portion 38 inserted into the opening (23).

Here, the positive electrode connection opening 21 and the negative electrode connection opening 23 are formed so as to be inserted corresponding to the shape of the positive electrode connection portion 34 and the negative electrode connection portion 38, as shown in FIG. Although it may be provided in a shape, the shape is not limited to this, it can be provided in a variety of shapes, such as circular, oval, easy to insert and electrical connection, of course.

Here, the cathode support jaw 36 may further include an insulation portion 37 for insulating the plate 35 from the cathode support jaw 36, and the insulation portion 37 may include the battery cell ( 10), the protection circuit module 20 and the cell cap 30 is a component for preventing a short circuit between the electrically connected positive and negative electrodes.

Here, the anode support jaw 32 and the cathode support jaw 36 are formed at the same height, and as shown in FIG. 2, the anode connection portion 34 and the cathode connection portion 38 are the anode support jaw 32 and It is provided with a smaller area than the area of the negative electrode support jaw 36, and can be inserted into the positive and negative connection ports 21 and 23 of the protective circuit module 20.

In addition, in order to improve the fastening force between the protective circuit module 20 and the cell cap 30, the positive electrode connection part 34 and the negative electrode connection part 38 have a predetermined inclination and be provided in a shape in which the cross-sectional area increases toward the lower side. It may be.

Here, the protection circuit module 20 is mounted with a semiconductor device 25, such as a resistor or a capacitor used in an electronic circuit, the semiconductor device 25 and the like has a predetermined height, so that the protection circuit module ( When 20) is coupled to the cell cap 30, a component mounting space such as the semiconductor device 25 should be provided.

The mounting space of the semiconductor device 25 may be formed by the anode support jaw 32 and the cathode support jaw 36 as shown in FIG. 4, and the cathode support jaw 32 and the cathode support jaw ( The height of 36 is preferably higher than the height of the semiconductor device 25 mounted on the protection circuit module 20.

In addition, as shown in FIG. 4, the insulation portion 37 may be provided to have a larger area than the cathode support jaw 36, but the area of the insulation portion 37 may be equal to the cathode support jaw 36. It may be the same.

By the configuration of the anode support jaw 32 and the cathode support jaw 36 as described above, the semiconductor element 25 of the protection circuit module 20 is mounted, and at the same time, the protection circuit module 20 It can be stably supported, thereby eliminating components such as an angular pole terminal plate electrically connecting the battery cell 10 and the protection circuit module 20 and a holder for supporting the protection circuit module 20. have.

In addition, by eliminating the components, it is possible to reduce the overall height of the battery pack produced, and to eliminate the spot welding process (welding of the polarity terminal plate and the protective circuit module), thereby reducing the production cost of the battery pack. have.

On the other hand, the battery pack according to the present invention, the upper case 40 to accommodate the above components on the battery cell 10, the battery cell 10, the cell cap 30 and the protection circuit module 20 is coupled The lower case 50 is provided to accommodate the lower part of the battery cell 10.

Here, the cell cap 30 may form one or more protrusions 39 protruding along the longitudinal direction of the plate 35 to maintain a fastening force with the upper case 40.

As shown in FIG. 2, the protrusion 39 may be formed in plural on the side surface of the plate 35, and may protrude to a predetermined length from the side surface of the plate 35.

In addition, the upper case 40 includes a case coupling portion 42 coupled to correspond to the protrusion 39, and the case coupling portion 42 has a portion corresponding to the protrusion 39 in FIG. 2. As shown, the coupling groove 41 may be formed.

Here, the case coupling portion 42 may be provided integrally with the upper case 40, the coupling groove 41 formed in the case coupling portion 42 and the protrusion formed in the cell cap 30 ( 39 may be fastened to each other by a fitting method.

In addition, the upper case 40, as shown in Figures 2 to 3, may further include a immersion tape 45 for checking whether the battery pack is immersed by the penetration of moisture.

Here, the immersion tape 45 is a label for checking the immersion state, and when immersion occurs in the battery pack, the submerged tape 45 is provided so that the immersion state can be confirmed by the change of color or the bleeding of the mark displayed on the immersion tape 45.

The immersion tape 45 may be attached to an attachment part provided in the upper case 40 to check whether the battery pack is immersed. In addition, the immersion tape 45 may be provided at various positions of the upper case 40.

On the other hand, between the lower case 50 and the battery cell 10 is interposed between the two-sided tape 60 is coated with an adhesive on both sides, the battery cell 10 and the lower portion by the double-sided tape (60) Flow of the case 50 can be prevented.

In addition, the bottom surface of the lower case 50 may be formed with a recess 52 for easily removing the battery pack from the mobile phone.

Here, the groove portion 52, as shown in Figure 4, may be provided as a groove having a predetermined size in the central portion of the lower case 50, the battery pack using the groove portion 52 It can be easily removed from.

On the other hand, the battery pack according to the present invention, the battery cell 10 in a state in which the cell cap 30, the protection circuit module 20, the upper, lower case 40, 50 is coupled, the battery cell 10 It may include a label wrapped from the side of the) via the front and rear parts.

Here, the label prevents flow between components of the battery pack, increases mechanical robustness, and may display one or more of letters, images, or graphics on the outer surface. That is, it is possible to display a trademark, a brand name, a manufacturer, or the like of the product through the letter, image, or graphic.

As described above, the battery pack according to the present invention can easily implement the connection between the amount of battery cells, the negative terminal and the protection circuit module, and at the same time reduce the overall height of the battery pack, battery cells, cell caps, The assembly of the protection circuit module and the upper case can be easily implemented, and the production cost of the battery pack can be reduced by simplifying the manufacturing process of the battery pack.

In addition, when a failure occurs in any one of the components of the battery pack, it is easy to replace the defective component, it is possible to reduce the replacement cost.

As mentioned above, although the present invention has been described by way of limited embodiments and drawings, the technical idea of the present invention is not limited thereto, and a person having ordinary skill in the art to which the present invention pertains, Various modifications and variations may be made without departing from the scope of the appended claims.

Since the accompanying drawings are for understanding the technical spirit of the present invention together with the detailed description of the above-described invention, the present invention should not be construed as limited to the matters shown in the following drawings.

1 is an exploded perspective view of a battery pack according to the prior art,

2 is an exploded perspective view of a battery pack according to the present invention;

3 is a combined perspective view of a battery pack according to the present invention;

4 is a cross-sectional view of a battery pack according to the present invention.

* Description of the symbols for the main parts of the drawings *

10: battery cell 20: protection circuit module

30: cell cap 40: upper case

50: lower case

Claims (10)

A battery cell including a positive terminal and a negative terminal and supplying charged power; A protection circuit module including a circuit pattern and a semiconductor element, for preventing overcharging or overdischarging of the battery cell; A cell cap for electrically connecting the positive terminal and the negative terminal to the protective circuit module; An upper case provided to receive the protection circuit module and the cell cap and coupled to an upper portion of the battery cell; And a lower case coupled to a lower portion of the battery cell. The cell cap may include a plate corresponding to an upper portion of the battery cell, electrically connecting the positive electrode terminal and the negative electrode terminal to one side and the other side of the main plate, respectively, and include a positive electrode connecting terminal and a negative electrode connecting terminal protruding upward. A battery pack characterized by the above. The method of claim 1, The protective circuit module is characterized in that the battery pack, characterized in that the positive connection terminal and the negative connection terminal is inserted into the negative connection terminal is formed. The method of claim 2, The positive electrode connection opening and the negative electrode connection opening is a battery pack, characterized in that the inner peripheral surface is plated in order to electrically connect the positive and negative connection terminal. The method of claim 3, wherein The positive electrode connection terminal is a battery pack, characterized in that provided with a positive electrode supporting jaw for supporting the protective circuit module and the cell cap and the protective circuit module a predetermined distance apart and inserted into the positive electrode connection opening. The method of claim 3, wherein The negative electrode connection terminal is a battery pack, characterized in that provided with a negative electrode support portion for supporting the protective circuit module and the cell cap and the protective circuit module spaced apart a predetermined distance and inserted into the negative electrode connection opening. The method according to claim 4 or 5, The cathode support jaw and the cathode support jaw are formed to have the same height, and the positive electrode connection portion and the negative electrode connection portion is a battery pack, characterized in that provided in a small area compared to the area of the anode support jaw and the cathode support jaw. The method of claim 6, The positive electrode connection portion and the negative electrode connection portion has a constant slope, characterized in that the cross-sectional area increases toward the lower side. The method of claim 1, And the cell cap is mounted on top of the battery cell, and joins the mutual bonding surfaces by laser welding. The method of claim 1, The cell cap is a battery pack, characterized in that to form one or more protrusions protruding along the longitudinal direction of the plate to maintain a fastening force with the upper case. The method of claim 9, The upper case includes a case coupling portion coupled to correspond to the protrusion, wherein the case coupling portion is a battery pack, characterized in that the coupling groove is formed in a portion corresponding to the protrusion.

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