KR101038024B1 - Battery pack - Google Patents

Abstract

A battery pack of the present invention, comprising: 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, wherein the upper case forms a positive connection bolt groove and a negative connection bolt groove, and a positive connection bolt fastened to the positive connection bolt groove and the negative connection bolt groove, respectively. Including a negative connection bolt, characterized in that for coupling the cell cap and the protective circuit module.

As a result, the amount of battery cells, the connection between the negative electrode terminal and the protection circuit module can be easily implemented, and the cell cap is provided with an accommodating part for accommodating semiconductor elements mounted on the protection circuit module, thereby increasing the overall height of the battery pack. Can be reduced.

Battery Packs, Battery Cells, Cell Caps

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, and an object of the present invention is to provide a battery pack that facilitates the connection between the amount of battery cells, the negative terminal and the protection circuit module.

Still another object of the present invention is to provide a battery pack capable of reducing the overall height of a battery pack by providing an accommodating part in which a semiconductor element or the like mounted in a protection circuit module is accommodated in a cell cap.

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 upper case forms a positive connection bolt groove and a negative connection bolt groove, and a positive connection bolt fastened to the positive connection bolt groove and the negative connection bolt groove, respectively. It can be achieved by a battery pack including a negative electrode connection bolt to combine the cell cap and the protection circuit module.

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. can do.

Here, the positive electrode connection terminal and the negative electrode connection terminal is provided to support the protective circuit module, the positive connection terminal groove and the negative connection terminal groove to which the positive connection bolt and the negative connection bolt may be formed, respectively.

In addition, the positive electrode connection terminal and the negative electrode connection terminal may be provided in the shape of a square, circle, oval.

On the other hand, the plate includes a receiving portion for receiving the semiconductor element of the protective circuit module, the receiving portion may be provided is recessed to a predetermined depth in the plate.

Here, the protective circuit module may have a positive connection opening and a negative connection opening in a portion corresponding to the positive connection terminal groove and the negative connection terminal groove.

In addition, the inner peripheral surface of the anode connection opening and the cathode connection opening may be plated.

Here, the positive connection bolt is fastened to the positive connection bolt groove of the upper case, the positive connection opening of the protective circuit module and the positive connection terminal groove of the cell cap, the negative connection bolt is the negative connection bolt of the upper case. The groove may be fastened to the negative electrode opening of the protective circuit module and the negative terminal connecting groove of the cell cap, so as to electrically connect the cell cap and the protective circuit module.

Here, the cell cap may be mounted on an upper portion of the battery cell, and may be provided to join the mutual bonding surfaces by laser welding.

According to the present invention, it is possible to easily implement the connection between the amount of the battery cell, the negative terminal and the protection circuit module.

In addition, the cell cap may include an accommodating part for accommodating a semiconductor device mounted on the protection circuit module to 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, the terms used in this specification and claims should not be construed in a dictionary sense, 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.

Therefore, the embodiments shown in the present specification and the drawings are only exemplary embodiments of the present invention, and not all of the technical ideas of the present invention are presented. Therefore, various equivalents It should be understood that water 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; And a lower case 50 coupled to the lower portion of the battery cell 10, wherein the upper case 40 forms a positive connection bolt groove 42 and a negative connection bolt groove 44, and the positive connection Including a positive connection bolt 46 and a negative connection bolt 48 fastened to the bolt groove 42 and the negative connection bolt groove 44, respectively, to couple the cell cap 30 and the protection circuit module 20. Can be prepared.

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 is a component for electrically connecting the positive and negative terminals 11 and 13 of the battery cell 10 and the protection circuit module (PCM) 20 to be described later. A positive electrode protruding upward from one side and the other side of the plate 35 and the positive and negative electrode terminals 11 and 13 respectively corresponding to the upper surface of the battery cell 10. The connecting terminal 31 and the negative electrode connecting terminal 33 are 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 bonding surfaces are joined by laser welding.

Here, the positive electrode connection terminal 31 and the negative electrode connection terminal 33 is a component provided to support the protective circuit module 20, the positive connection bolt 46 and the negative connection bolt 48 is fastened respectively. The positive connection terminal groove 32 and the negative connection terminal groove 34 may be formed.

In addition, the positive electrode connection terminal 31 and the negative electrode connection terminal 33 may be provided in various shapes for supporting the protective circuit module 20. In FIG. 2, the shape is not limited thereto. In addition, it may be provided in various shapes that can efficiently support the protective circuit module 20, such as rectangular, oval.

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 22 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 24 can be formed.

Here, the positive electrode connection opening 22 and the negative electrode connection opening 24 are portions in which the positive electrode connection bolt 46 and the negative electrode connection bolt 48 are inserted, respectively, and the inner circumferential surface is plated, so that the protection circuit module 20 ) And the cell cap 30 are electrically connected.

That is, the positive electrode connection openings 22 and the negative electrode connection openings 24 are disposed to correspond to the positive electrode connection terminal grooves 32 and the negative electrode connection terminal grooves 34, and the positive electrode connection bolts 46 and the negative electrode connection bolts are disposed. 48 are respectively inserted into the corresponding positive and negative connection openings 22 and 24 and positive and negative connection terminal grooves 32 and 34 so that the battery cell 10 and the protection circuit module 20 are electrically connected. Can be.

Here, the negative electrode connection terminal 33 may further include an insulation part (not shown) for insulating the plate 35 and the negative electrode connection terminal 33, and the insulation part may include the battery cell 10, The protection circuit module 20 and the cell cap 30 are components for preventing a short circuit between the electrically connected positive and negative electrodes.

Here, the positive electrode connection terminal 31 and the negative electrode connection terminal 33 may be formed at the same height within the processing error range.

On the other hand, 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.

As shown in FIG. 2, the mounting space of the semiconductor device 25 is formed at the center of the cell cap 30 by having the positive connection terminal 31 and the negative connection terminal 33 have a constant height. Can be.

In addition, as shown in FIG. 4, the mounting space of the semiconductor device 25 may be provided by an accommodating part 36 formed at the center of the plate 35, and the accommodating part 36 may include the plate ( It is provided to be recessed to a predetermined depth in 35, the depth of the receiving portion 36 is the height of the semiconductor element 25 mounted on the protective circuit module 20 and the positive electrode connection terminal 31 and the negative electrode connection terminal It is preferable to determine the depth of the accommodation portion 36 by comparing the height of (33).

That is, when the receiving part 36 is not provided, the height of the positive electrode connection terminal 31 and the negative electrode connection terminal 33 should be slightly higher than the height of the semiconductor element 25.

On the other hand, in the case where the accommodating part 36 is provided, a value obtained by adding the heights of the positive electrode connecting terminal 31 and the negative electrode connecting terminal 33 and the depth of the accommodating part 36 is equal to that of the semiconductor element 25. It should be formed slightly higher than the height.

As described above, the semiconductor device 25 of the protective circuit module 20 is mounted at the same time by the configuration of the positive electrode connecting terminal 31 and the negative electrode connecting terminal 33 of the cell cap 30. The circuit module 20 can be stably supported on the upper surfaces of the positive electrode connection terminal 31 and the negative electrode connection terminal 33, and is fastened by the positive electrode connection bolt 46 and the negative electrode connection bolt 48, 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 may be deleted.

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 upper case 40, the positive connection bolt groove 42 and the negative connection bolt groove 44 for fastening the positive connection bolt 46 and the negative connection bolt 48, as shown in Figure 2, The amount of the cell cap 30, the cathode connection terminal grooves 32 and 34 and the protection circuit module 20, and the cathode connection openings 22 and 24 may be formed in corresponding portions.

That is, the positive electrode connection bolt 46 is first inserted into the positive electrode connection bolt groove 42, and the positive electrode connection terminal groove of the cell cap 30 is provided through the positive electrode connection opening 22 of the protective circuit module 20. And the negative electrode connection bolt 48 is first inserted into the negative electrode connection bolt groove 44, and through the negative electrode connection opening 24 of the protective circuit module 20, the cell cap 30. Fastened to the negative terminal connecting groove 34, the cell cap 30 and the protection circuit module 20 may be electrically connected.

In addition, due to the configuration of the positive electrode connection bolt 46 and the negative electrode connection bolt 48, it is possible to prevent the flow of the protection circuit module 20 accommodated therein, the battery pack can be easily assembled and disassembled It can be effective.

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 the battery cell, the negative terminal and the protection circuit module, accommodating a semiconductor element mounted on the protection circuit module in the cell cap is accommodated By providing a wealth, the overall height of the battery pack can be reduced.

In addition, it is easy to assemble the battery cell, cell cap, protective circuit module, the upper case, and to simplify the manufacturing process of the battery pack to reduce the production cost of the battery pack, to any of the components of the battery pack If a failure occurs, the replacement of the defective component can be facilitated and the replacement cost can be reduced.

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 (9)

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 upper case forms a positive connection bolt groove and a negative connection bolt groove, and includes a positive connection bolt and a negative connection bolt fastened to the positive connection bolt groove and the negative connection bolt groove, respectively, the cell cap and the protection circuit module are coupled to each other. And 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. delete The method of claim 1, The positive electrode connection terminal and the negative electrode connection terminal is provided to support the protective circuit module, the battery pack, characterized in that the positive connection terminal groove and the negative connection terminal groove to which the positive connection bolt and the negative connection bolt are fastened, respectively. The method of claim 3, wherein The positive electrode connection terminal and the negative electrode connection terminal is a battery pack, characterized in that provided in any one of a rectangular, circular, oval shape. The method of claim 1, The plate includes a receiving portion for receiving the semiconductor element of the protective circuit module, the receiving portion is a battery pack, characterized in that formed in the plate to a predetermined depth. The method of claim 3, wherein The protective circuit module is a battery pack, characterized in that the positive connection opening and the negative connection opening is formed in a portion corresponding to the positive connection terminal groove and the negative connection terminal groove. The method of claim 6, The anode connection opening and the cathode connection opening are battery packs, characterized in that the inner peripheral surface is plated. The method of claim 7, wherein The positive connection bolt is fastened to the positive connection bolt groove of the upper case, the positive connection opening of the protective circuit module and the positive connection terminal groove of the cell cap, and the negative connection bolt is the negative connection bolt groove of the upper case and the And a negative electrode connection opening of the protective circuit module and a negative electrode connecting terminal groove of the cell cap to electrically connect the cell cap and the protective circuit module. 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.

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