KR101479304B1 - Package of battery protection circuits module - Google Patents

Abstract

The present invention relates to a package of a battery protection circuit module suitable for integration and miniaturization. The package of a battery protection circuit module includes: a lead frame which includes a lead for an internal connection terminal, a lead for an external connection terminal, and a lead for mounting a device; a battery protection circuit component mounted on the lead for mounting a device; and an encapsulating material which exposes parts of the lead frame and encapsulates the battery protection circuit component. The lead for an internal connection terminal includes a lead for a first internal connection terminal and a lead for a second internal connection terminal which are exposed to the outside of the encapsulating material and be electrically bonded and connected to a pair of the electrode taps of a battery cell. One of the lead for a first internal connection terminal and the lead for the second internal connection terminal can be folded to allow one of the pair of the electrode taps to be interposed.

Description

[0001] The present invention relates to a battery protection circuit module,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package of a battery protection circuit module, and more particularly, to a package of a battery protection circuit module that can be downsized and easily mounted on a battery pack or a battery can.

Generally, batteries are used in mobile terminals such as mobile phones and PDAs. Lithium-ion batteries are the most widely used batteries in portable handsets, and they have overcharging and over-currents, and when the temperature rises due to the heat generation, the performance deteriorates as well as the risk of explosion. Therefore, a normal battery may include a protection circuit device that detects overcharge, over-discharge, and over-current and blocks battery operation. Such a conventional protection circuit device is generally formed by bonding a protection IC, a field effect transistor, a resistor, and a capacitor to a printed circuit board (PCB) by soldering. However, the conventional protection circuit device has a problem that the space occupied by the printed circuit board or the like is too large to be miniaturized. In addition, the process of electrically connecting the protection circuit device to the external connection terminal or the internal connection terminals through a separate wiring, wire bonding, or exposed terminals of the printed circuit board is complicated and easy .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a battery protection circuit module package which is advantageous for integration and downsizing. However, these problems are exemplary and do not limit the scope of the present invention.

A battery protection circuit module package according to an aspect of the present invention is provided. The battery protection circuit module package includes a lead frame including a lead for an internal connection terminal, a lead for an external connection terminal, and a device mounting lead, a battery protection circuit component mounted on the device mounting lead, And an encapsulant for sealing the battery protection circuit component while exposing the battery protection circuit component. The lead for the internal connection terminal includes a lead for a first internal connection terminal and a lead for a second internal connection terminal which are exposed to the outside of the sealing material and can be electrically connected to a pair of electrode tabs of the battery cell And the leads for the internal connection terminals of the leads for the first internal connection terminal and the leads for the second internal connection terminal may be folded so that any one of the pair of electrode tabs is interposed therebetween.

Wherein the leads for the internal connection terminals of the leads for the first internal connection terminal and the leads for the second internal connection terminal in the battery protection circuit module package include an inner side portion and an outer side portion, And may be folded 180 degrees with respect to the medial side so that any one is interposed therebetween.

In the battery protection circuit module package, the inner side portion may be extended to the outside of the sealing member while being connected to the lead for the external connection terminal or the element mounting lead.

The lead for the internal connection terminal of any one of the lead for the first internal connection terminal and the lead for the second internal connection terminal in the battery protection circuit module package includes an inner side portion and an outer side portion, And may be folded 180 degrees with respect to the outer side so that any one is interposed therebetween.

In the battery protection circuit module package, the outer side portion may be extended to the outside of the sealing member while being connected to the lead for the external connection terminal or the element mounting lead.

In the battery protection circuit module package, the inner side portion may be closer to the center portion of the sealing material than the outer side portion.

The first folding line between the inner side portion and the outer side portion configured to fold the inner side portion or the outer side portion in the battery protection circuit module package may be parallel to the width direction of the sealing material.

In the battery protection circuit module package, the leads for the first internal connection terminal and the leads for the second internal connection terminal are further bent along a second folding line parallel to the longitudinal direction of the encapsulation material so as to be raised with respect to the lead for the external connection terminal .

Wherein the external connection terminal leads and the device mounting leads in the battery protection circuit module package include a plurality of leads spaced apart from each other, and the battery protection circuit component includes a protection IC, a field effect transistor, and at least one passive element Wherein the passive element is arranged to connect at least a part of the plurality of spaced leads to each other and electrically connects any two selected from the group consisting of the protection IC, the field effect transistor and the plurality of leads The battery protection circuit can be constructed without using a separate printed circuit board.

In the battery protection circuit module package, the electrical connection member may include a bonding wire or a bonding ribbon.

In the battery protection circuit module package, the protection IC and the field effect transistor are not inserted and fixed in the form of a semiconductor package on the lead frame, but may be separately formed on at least a part of the surface of the lead frame, In the form of a chip die that is not sealed with an encapsulant of the present invention.

A battery protection circuit module package according to another aspect of the present invention is provided. Wherein the battery protection circuit module package comprises: a lead frame including a lead for an internal connection terminal, a lead for an external connection terminal, and a device mounting lead; A battery protection circuit component mounted on the device mounting lead; And an encapsulant for sealing the battery protection circuit component while exposing a part of the lead frame. The lead for the internal connection terminal includes a lead for a first internal connection terminal and a lead for a second internal connection terminal which are exposed to the outside of the sealing material and can be electrically connected to a pair of electrode tabs of the battery cell And the leads for the internal connection terminals of the leads for the first internal connection terminal and the leads for the second internal connection terminal are connected to the lead for the external connection terminal or the lead for device mounting while being extended to the outside of the encapsulation material Wherein the lead frame includes an inner side portion and an outer side portion, and the lead frame is provided between the inner side portion and the outer side portion and the lead for the external connection terminal or the element mounting lead to connect the inner side portion and the outer side portion to the lead for external connection terminal or the element mounting lead And a trim portion that is disposed and selectively removable.

Wherein the battery protection circuit module package includes a first pair of bending holes and a second pair of bending holes spaced apart from each other between the inner side portion and the outer side portion and parallel to the width direction of the sealing material, The inner side portion or the outer side portion may be folded along a connecting folding curve or a folding line connecting the second pair of folding holes.

According to some embodiments of the present invention as described above, a battery protection circuit module package advantageous for integration and miniaturization can be provided. Of course, the scope of the present invention is not limited by these effects.

1 is a circuit diagram of a battery protection circuit to be implemented by a battery protection circuit module package according to an embodiment of the present invention.
2 is a diagram illustrating an arrangement structure of a stacked chip constituting a part of a battery protection circuit module package according to a modified embodiment of the present invention.
3 is a circuit diagram of another battery protection circuit to be implemented by the battery protection circuit module package according to another modified embodiment of the present invention.
4 is a plan view illustrating a portion of a battery protection circuit module package according to an embodiment of the present invention.
5 is a perspective view illustrating a portion of a battery protection circuit module package according to an embodiment of the present invention.
Figures 6 and 7 are top and perspective views, respectively, illustrating a battery protection circuit module package in accordance with some embodiments of the present invention.
8 and 9 are sectional views illustrating a battery protection circuit module package having a battery cell in which a pair of electrode tabs protrude from a battery pack according to another embodiment of the present invention and a lead for an internal connection terminal, Are plan views showing a configuration before coupling.
10 is a perspective view illustrating a configuration in which the outer side portion of the inner connection terminal lead is bent at an angle of 90 degrees inward with respect to the inner connection terminal lead in the battery protection circuit module package according to an embodiment of the present invention.
11 is a perspective view of a battery protection circuit module package according to an embodiment of the present invention, in which the outer side portion is folded inward at an angle of 180 degrees with respect to the inner side of the lead for the internal connection terminal.
FIG. 12 is a sectional view of a battery protection circuit module package according to an embodiment of the present invention. FIG. 12 is a perspective view illustrating a battery protection circuit module package according to an embodiment of the present invention. It is a perspective view.
13 is a perspective view of a battery pack according to another embodiment of the present invention in which a battery protection circuit module package having a battery cell protruding from a pair of electrode tabs and a lead for an internal connection terminal, Fig. 7 is a plan view illustrating the configuration before.
14 is a perspective view illustrating a configuration in which the inner side portion is bent outward at an angle of 90 degrees with respect to the outer side of the lead for the inner connection terminal in the battery protection circuit module package according to an embodiment of the present invention.
15 is a perspective view illustrating a configuration in which the inner side portion is folded outward at an angle of 180 degrees with respect to the outer side of the lead for the inner connection terminal in the battery protection circuit module package according to an embodiment of the present invention.
16 is a sectional view of a battery protection circuit module package according to an embodiment of the present invention, in which the leads for internal connection terminals are further bent upward at an angle of 90 degrees from a state where the inner side is folded with respect to the outer side of the lead for the internal connection terminal It is a perspective view.
17 is a perspective view illustrating a battery protection circuit module package assembly according to another embodiment of the present invention.
18 is a perspective view illustrating a structure of an intermediate process for implementing a battery pack according to another embodiment of the present invention.
19 is a perspective view illustrating a battery pack according to another embodiment of the present invention.

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

Some embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art, and the following embodiments may be modified in various other forms, The present invention is not limited to the following examples. Rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the invention to those skilled in the art. In the drawings, the thickness and size of each layer are exaggerated for convenience and clarity of explanation.

It is to be understood that throughout the specification, when an element such as a film, region or substrate is referred to as being "on", "connected to", "laminated" or "coupled to" another element, It is to be understood that elements may be directly "on", "connected", "laminated" or "coupled" to another element, or there may be other elements intervening therebetween. On the other hand, when one element is referred to as being "directly on", "directly connected", or "directly coupled" to another element, it is interpreted that there are no other components intervening therebetween do. Like numbers refer to like elements. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items.

Although the terms first, second, etc. are used herein to describe various elements, components, regions, layers and / or portions, these members, components, regions, layers and / It is obvious that no. These terms are only used to distinguish one member, component, region, layer or section from another region, layer or section. Thus, a first member, component, region, layer or section described below may refer to a second member, component, region, layer or section without departing from the teachings of the present invention.

Also, relative terms such as "top" or "above" and "under" or "below" can be used herein to describe the relationship of certain elements to other elements as illustrated in the Figures. Relative terms are intended to include different orientations of the device in addition to those depicted in the Figures. For example, in the figures the elements are turned over so that the elements depicted as being on the top surface of the other elements are oriented on the bottom surface of the other elements. Thus, the example "top" may include both "under" and "top" directions depending on the particular orientation of the figure. If the elements are oriented in different directions (rotated 90 degrees with respect to the other direction), the relative descriptions used herein can be interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a," "an," and "the" include singular forms unless the context clearly dictates otherwise. Also, " comprise "and / or" comprising "when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups.

Hereinafter, some embodiments of the present invention will be described with reference to the drawings schematically illustrating ideal embodiments of the present invention. In the drawings, for example, variations in the shape shown may be expected, depending on manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention should not be construed as limited to the particular shapes of the regions shown herein, but should include, for example, changes in shape resulting from manufacturing.

In some embodiments of the present invention, the lead frame may be structured such that the lead terminals are patterned on the metal frame, and the structure and the thickness of the printed circuit board on which the metal wiring layer is formed on the insulating core.

1 is a circuit diagram of a battery protection circuit to be implemented by a battery protection circuit module package according to an embodiment of the present invention.

1, a battery protection circuit 10 applied to a battery protection circuit module package according to an embodiment of the present invention includes first and second internal connection terminals B + and B -), first and second external connection terminals P + and P- which may be connected to an electronic device (e.g., a portable terminal or the like) connected to the charger when charging and discharged by battery power do. It can be understood that the first external connection terminal P + and the second external connection terminal P- are for power supply.

The battery protection circuit 10 includes a connection structure of the dual FET chip 110, the protection integrated circuit 120, the resistors R1 and R2, the varistor V1, and the capacitors C1, C2 and C3 I have. The dual FET chip 110 includes a first field effect transistor (FET1) and a second field effect transistor (FET2) having a drain common structure. The protection IC 120 is connected to the first internal connection terminal B- which is the negative terminal of the battery through the resistor R1 and the charge voltage or the discharge voltage is applied through the first node n1 A reference terminal (Vss terminal) which is a reference for an operation voltage in the protection integrated circuit 110, a detection terminal V (for detecting a charging / discharging and an overcurrent state) (Dout terminal) for turning off the first field effect transistor (FET1) in the overdischarged state, a charge cutoff signal output terminal (Dout terminal) for turning off the second field effect transistor (FET2) in the overcharge state, (Cout terminal).

At this time, the inside of the protection integrated circuit 120 includes a reference voltage setting unit, a comparison unit for comparing a reference voltage with a charge / discharge voltage, an overcurrent detection unit, and a charge / discharge detection unit. Here, the criterion for determining the charging and discharging states can be changed to the specification (SPEC) required by the user, and the charging / discharging state is determined by recognizing the voltage difference of each terminal of the protection integrated circuit 120 according to the predetermined standard.

When the protection integrated circuit 120 reaches an overdischarge state at the time of discharging, the Dout terminal becomes LOW to turn off the first field effect transistor FET1, and when the overcharge state is reached, the Cout terminal becomes low, The second field effect transistor FET2 is turned off when the overcurrent flows, and the first field effect transistor FET1 is turned off when the overcurrent flows.

The resistor R1 and the capacitor C1 serve to stabilize the fluctuation of the supply power source of the protection integrated circuit 120. [ The resistor R1 is connected between the first node n1 which is the supply node of the battery power supply V1 and the Vdd terminal of the protection integrated circuit 120 and the capacitor C1 is connected between the Vdd terminal and the Vss terminal of the protection integrated circuit Lt; / RTI > Here, the first node n1 is connected to the first internal connection terminal B- and the first external connection terminal P +. When the resistance R1 is increased, the detection voltage becomes higher due to the current penetrated into the protection integrated circuit 120 at the time of voltage detection, so that the value of the resistor R1 is set to an appropriate value of 1 K or less. Also, for stable operation, the value of the capacitor C1 has an appropriate value of 0.01 mu F or more.

And the resistors R1 and R2 become current limiting resistors when the high voltage charger or charger exceeding the absolute maximum rating of the protection integrated circuit 120 is connected upside down. The resistor R2 is connected between the V- terminal of the protection integrated circuit 120 and the second node n2 to which the source terminal S2 of the second field effect transistor FET2 is connected. Since the resistors R1 and R2 may cause power consumption, the sum of the resistance values of the resistors R1 and R2 is usually set to be larger than 1 K ?. If the resistance R2 is too large, the return may not occur after the overcharge cutoff, so that the value of the resistance R2 is set to a value of 10K or less.

The capacitor C2 is connected between the second node n2 and the source terminal S1 (or the VSS terminal, the second internal connection terminal B +) of the first field effect transistor FET1. The capacitor C2 does not significantly affect the characteristics of the battery protection circuit product, but is added for user's request or stability. The capacitor C2 is for stabilizing the system by improving the resistance to voltage fluctuation and external noise.

The capacitor C3 and the varistor V1 are elements for ESD (Electrostatic Discharge) and surge protection. The first external connection terminal P + and the second external connection terminal P- . The resistance of the varistor (V1) is lowered when an overvoltage occurs. When the overvoltage is generated, the resistance of the varistor (V1) is lowered, thereby minimizing circuit damage due to overvoltage.

In the present invention, a package of a battery protection circuit module formed by packaging the battery protection circuit 10 shown in FIG. 1 including external connection terminals P +, P- and internal connection terminals B +, B- . The protection circuit according to the embodiment of the present invention described above is merely an example and the arrangement of the field effect transistor or the passive element, the number and arrangement of the passive elements and the arrangement of the (+) or (- .

2 is a diagram illustrating an arrangement structure of a stacked chip constituting a part of a battery protection circuit module package according to a modified embodiment of the present invention.

2, the arrangement of the dual FET chip 110 and the protection integrated circuit 120 is such that the dual FET chip 110 and the protection integrated circuit 120 are stacked vertically or disposed adjacent to each other . For example, the dual FET chip 110 may have a structure in which the protection integrated circuit 120 is stacked on the top surface, or the dual FET chip 110 may be disposed adjacent to the left or right side of the protection integrated circuit 120 have.

The dual FET chip 110 includes a first field effect transistor and a second field effect transistor having a common drain structure, that is, two field effect transistors, and the external connection terminal includes a first gate terminal G1 And the second source terminal G2 and the second source terminal S2 of the second field effect transistor are provided on the upper surface of the dual FET chip 110. [ In addition, the common drain terminal D may be provided on the lower surface of the dual FET chip 110.

The protection integrated circuit 120 has a structure that is stacked on the upper surface of the dual FET chip 110. The protection integrated circuit 120 is stacked on a region (for example, a central portion) excluding a portion where external connection terminals on the dual FET chip 110 are disposed. At this time, an insulation layer may be disposed between the protection integrated circuit 120 and the dual FET chip 110, and the protection integrated circuit 120 and the dual FET chip 110 may be bonded with an insulating material. . Since the size of the dual FET chip 110 is larger than that of the protection integrated circuit 120, the configuration of stacking the protection integrated circuit 120 on the dual FET chip 110 is adopted.

After the protection integrated circuit 120 is stacked on the upper surface of the dual FET chip 110, the Dout terminal DO of the protection integrated circuit 120 is electrically connected to the first gate terminal G1 through a wire or a wiring And the Cout terminal CO of the protection integrated circuit 120 is electrically connected to the second gate terminal G2 through a wire or a wire. The protection integrated circuit 120 and the dual FET chip 110 having the above-described laminated structure will be collectively referred to as a laminated chip 100a.

In the battery protection circuit module package according to the modified embodiment of the present invention, the protection integrated circuit 120 having the laminated structure and the laminated chip 100a of the dual FET chip are introduced so that the area to be mounted on the lead frame The size of the battery can be reduced or the capacity of the battery can be increased.

3 is a circuit diagram of another battery protection circuit to be implemented by the battery protection circuit module package according to another modified embodiment of the present invention. FIG. 3 is an equivalent circuit diagram of FIG. 1 as a battery protection circuit diagram when the first field effect transistor (FET1), the second field effect transistor (FET2), and the protection IC are integrally provided on one chip.

As shown in Fig. 3, if a circuit is formed by implementing the flip chip 100b in which the protection IC 120 of Fig. 1 and the two FETs FET1 and FET2 of the common drain structure are integrated, A simpler circuit can be realized while performing the same operation as described. Since the flip chip 100b is soldered and electrically connected to a lead or the like which requires electrical connection without requiring additional wire bonding, the electrical conductivity of the flip chip 100b can be improved compared to the wire bonding, the production cost can be reduced, and the process can be simplified. And it has the advantage of reducing the volume occupied.

In addition, in another modified embodiment of the present invention, a resistor may be provided instead of the varistor V1 in a surge protection circuit configured to protect a surge such as ESD (Electrostatic Discharge). That is, the circuit for surge protection includes a configuration in which two resistors are connected in parallel, a configuration in which one resistor and one capacitor are connected in parallel, a configuration in which one resistor and one varistor are connected in parallel, a configuration in which one capacitor and one varistor And a configuration in which a plurality of memory cells are connected in parallel.

The battery protection circuit module package may include a printed circuit board and a battery protection circuit element disposed on the printed circuit board. Alternatively, the battery protection circuit module package may include a lead frame and a battery protection circuit element disposed on the lead frame. Here, the battery protection circuit element may include a protection integrated circuit, a field effect transistor, and at least one passive element. In the embodiments of the present invention, the lead frame may be divided into a structure in which the lead terminals are patterned on the metal frame, and a structure and thickness of the lead frame are different from those of the printed circuit board on which the metal wiring layer is formed. Hereinafter, a package for disposing the battery protection circuit element on the lead frame will be described.

FIG. 4 is a plan view illustrating a portion of a battery protection circuit module package according to an embodiment of the present invention, and FIG. 5 is a perspective view illustrating a portion of a battery protection circuit module package according to an embodiment of the present invention.

4 and 5, in the battery protection circuit module package according to the embodiment of the present invention, the lead frame 50 includes internal connection terminal leads 51 and 52, external connection terminal leads 58a and 58b, And an element mounting lead 59. In another aspect, the lead frame 50 includes a plurality of leads L1 to L8 spaced from each other. For example, the external connection terminal leads 58a and 58b and the device mounting lead 59 include a plurality of leads L 1 to L 7 spaced from each other. At least one of the external connection terminal leads 58a and 58b may be connected to the first internal connection terminal B- and the second internal connection terminal B +. For example, the lead 58a for the external connection terminal constituting the first external connection terminal P + is connected to the lead for the internal connection terminal B- constituting the first internal connection terminal B- by the first trim portion 55a, Is connected to the inner side portion (51a) of the base (51). The lead 58a for the external connection terminal constituting the first external connection terminal P + is connected to the lead 51 for the internal connection terminal 51 constituting the first internal connection terminal B- by the second trim portion 55b And is connected to the outer side portion 51b. The inner side portion 51a of the lead 51 for internal connection terminals may be closer to the center portion of the lead frame 50 than the outer side portion 51b. The size, arrangement and configuration of the plurality of spaced apart leads L 1 to L 8 shown in the drawings are exemplary and can be appropriately modified in accordance with the additional function of the protection circuit.

On the element mounting leads 59, battery protection circuit components 110, 120, and 130 may be mounted. The battery protection circuit components 110, 120, and 130 may include a field effect transistor 110, a protection IC 120, and at least one passive device 130.

The basic package 200a having the arrangement structure shown in FIG. 4 can be understood as a structure prior to forming the encapsulant 250, and then, through a process such as molding with the encapsulant 250, Thereby implementing the module package (300 in FIG. 6). The encapsulant 250 may comprise, for example, an epoxy molding compound (EMC). The portion where the encapsulant 250 is formed may correspond to the predetermined region M shown in FIG. 5, a portion of the basic package 200a that can be sealed by the encapsulant 250 is shown. The encapsulant 250 may seal the battery protection circuit components 110, 120, and 130 while exposing a part of the lead frame 50. [ For example, the encapsulant 250 exposes one side of the leads 51 and 52 for the internal connection terminal and the leads 58a and 58b for the external connection terminal while the battery protection circuit components 110, 120 and 130 are exposed, Can be sealed.

The protection IC chip 120 is mounted on the lead L4 and the field effect transistor chip 110 is mounted on the lead L3. The passive element 130 is arranged to connect at least a part of the plurality of spaced leads L 1 to L 8 to each other. For example, the resistor R1 is disposed on the leads L1 and L4 so as to extend between the leads L1 and L4 that are spaced from each other, and the varistor V1 is connected to the leads L1 The capacitors C2 are disposed on the leads L1 and L2 so as to extend between the leads L5 and L6 so as to extend between the leads L5 and L6, And may be disposed on the lead L6. On the other hand, it is possible to provide an electrical connecting member 220 for electrically connecting any two selected from the group consisting of the field effect transistor 110, the protection IC 120 and the plurality of leads L 1 to L 8 spaced from each other have. The electrical connection member 220 may include a bonding wire or a bonding ribbon. Due to such a configuration, the battery protection circuit module package according to some embodiments of the present invention can constitute a battery protection circuit without using a separate printed circuit board. The fact that the printed circuit board has a thicker thickness than the lead frame, which is disadvantageous for miniaturization of the package, and the circuit configuration is relatively easy to deform, makes it possible to construct a battery protection circuit without using a separate printed circuit board Lt; / RTI >

In addition, the battery protection circuit module package 300 according to some embodiments of the present invention may have a lead frame 50 having a plurality of spaced mounting leads, but may also include electrical connection members 220, such as bonding wires or bonding ribbons ) Is disposed on the lead frame 50 to constitute a circuit, so that the process of designing and manufacturing the lead frame 50 for constituting the battery protection circuit can be simplified. In some embodiments of the present invention, if the electrical connection member 220 is not implemented in implementing the battery protection circuit component, the configuration of the plurality of leads constituting the lead frame 50 becomes very complicated, 50 may not be easy to provide effectively.

In a battery protection circuit module package 300 according to some embodiments of the present invention, a lamination chip including a protection IC chip, a field effect transistor chip, or a protection IC and a field effect transistor is formed on the lead frame 50 A chip mounted on at least a part of the surface of the lead frame 50 by a surface mounting technology rather than being inserted and fixed in the form of a semiconductor package, And can be mounted and fixed in the form of a die (chip die). Here, a chip die is a wafer on which a plurality of array structures (for example, a protection IC chip or a field effect transistor chip) are formed, Means an individual structure implemented. A protection IC chip on the lead frame 50; A field effect transistor chip; And a multilayer chip including a protection IC and a field effect transistor are mounted in a state in which they are not sealed with a separate sealing material when the sealing material 250 is mounted in a sealed state, IC chip; A field effect transistor chip; Alternatively, since the multilayer chip including the protection IC and the field effect transistor is sealed, the process of forming the encapsulant in the battery protection circuit module package 300 can be performed only once. On the other hand, the protection IC chip; A field effect transistor chip; Alternatively, when a multilayer chip including a protection IC and a field effect transistor is separately inserted into a printed circuit board (PCB) and fixed or mounted, a single molding process is firstly required for each component, Or another mounting process is further required for each component mounted after mounting, the manufacturing process may be complicated and the manufacturing cost may increase.

Figures 6 and 7 are top and perspective views, respectively, illustrating a battery protection circuit module package in accordance with some embodiments of the present invention.

4 to 7, a battery protection circuit module package 300 according to some embodiments of the present invention includes internal connection terminal leads 51 and 52, external connection terminal leads 58a and 58b, A lead frame (50) including a mounting lead (59); Battery protection circuit components 110, 120, and 130 mounted on the element mounting leads 59; And an encapsulant 250 sealing the battery protection circuit components 110, 120 and 130 while exposing a part of the lead frame 50. [

The internal connection terminal leads 51 and 52 are exposed to the outside of the sealing material 250 and are electrically connected to a pair of electrode tabs 720 of the battery cell (51) and a second internal connection terminal lead (52). In the battery protection circuit module package 300 according to some embodiments of the present invention, the lead 51 for the first internal connection terminal is connected to the lead 58a for the external connection terminal and extends to the outside of the encapsulant 250 And includes a medial portion 51a and an outer portion 51b.

The lead frame 50 is disposed between the inside portion 51a and the lead 58a for external connection terminal so as to connect the inside portion 51a of the lead 51 for internal connection terminal to the lead 58a for external connection terminal, And a first trim portion 55a which may be removed. The lead frame 50 is disposed between the outer portion 51b and the lead 58a for external connection terminal so as to connect the outer portion 51b of the lead 51 for the inner connection terminal to the lead 58a for the outer connection terminal And a second trim portion 55b which may be selectively removed. The first trim portion 55a and the second trim portion 55b are disposed between the lead 51 for internal connection terminal and the lead 59 for element mounting so that the lead 51 for internal connection terminal, May be configured to be connected to the element mounting leads (59).

The lead 51 for the internal connection terminal is disposed between the inner side portion 51a and the outer side portion 51b and has a plurality of pairs of bend holes 52 arranged to be parallel to the width direction of the sealing material 250 Lt; / RTI > For example, the internal connection terminal lead 51 includes a first pair of bending holes 53a disposed between the inner side portion 51a and the outer side portion 51b and disposed to be parallel to the width direction of the sealing material 250, And a second pair of bending holes 53b. The outer side portion 51b is formed along the folding line 54b connecting the folding line 54a connecting the first pair of folding holes 53a or the folding holes 53b connecting the second pair, The inner side portion 51a may be folded in the outward direction with respect to the outer side portion 51b. The folding lines 54a and 54b connecting the pair of folding holes 53a and 53b may be parallel to the width direction of the sealing material 250. [ The above-described pair of bending holes are introduced to easily realize a folding line for folding the inner side and the outer side, and may have a shape of a hole, a trench, a cavity or a slit.

The battery protection circuit module package 300 according to some embodiments of the present invention shown in FIGS. 6 and 7 can be understood as a package reflecting the state before selectively removing the trim portions 55a and 55b. Hereinafter, the first trim portion 55a or the second trim portion 55b is selectively removed in accordance with the distance or width of the pair of electrode tab protruding from the battery cell, and the lead 51 for the first internal connection terminal, Quot; is folded.

First, a configuration in which the outer side portion 51b is folded with reference to the inner side portion 51a will be described.

8 and 9 show a battery cell 700 according to another embodiment of the present invention in which a pair of electrode tabs 720 are protruded and a battery cell 700 in which the outer side portion 51b is folded with respect to the inner side portion 51a Are plan views illustrating a configuration before the battery protection circuit module package 300 having the internal connection terminal leads 51 are coupled. 10 and 11 are sectional views illustrating a battery protection circuit package according to an embodiment of the present invention, in which the outer side portion is bent at an angle of 90 degrees with respect to the inner side of the lead for the inner connection terminal, 12 is a perspective view illustrating a battery protection circuit package according to an embodiment of the present invention. FIG. 12 is a perspective view illustrating a battery protection circuit package according to an embodiment of the present invention. FIG. 6 is a perspective view illustrating an additional folded configuration at an angle.

8 and 9, a battery cell 700 including a pair of protruding electrode tabs 720 is provided. The battery cell 700 includes, for example, a battery cell constituting a polymer battery pack. The pair of electrode tabs 720 has an electrode tab 720a having a first polarity and an electrode tab 720b having a second polarity. The internal connection terminal leads 51 and 52 are electrically connected to the pair of electrode tabs 720. For example, the internal connection terminal lead 51 is electrically connected to the electrode tab 720a having the first polarity while being folded with the electrode tab 720a having the first polarity interposed therebetween, The terminal lead 52 is electrically connected with the electrode tab 720b having the second polarity.

8, 10 and 11, when the separation distance between the electrode tab 720a having the first polarity and the electrode tab 720b having the second polarity is the first distance d1, The electrode tabs 720a having the first polarity correspond to the inner portions 51a of the internal connection terminal leads 51 when the electrode tabs 720b having the first polarity are first disposed so as to be connected to the leads 52 for the internal connection terminals Specifically, the electrode tab 720a having the first polarity is located on the right side of the folding line 54a. In this case, in order to fold the lead 51 for internal connection terminals, the second trim portion 55b of FIG. 6 is selectively trimmed and removed without removing the first trim portion 55a of FIG. 6, The outer side portion 51b can be bent at an angle of 90 degrees inward (refer to Fig. 10) and finally bent at an angle of 180 degrees (see Fig. 11). At this time, the folding boundary portion between the inner side portion 51a and the outer side portion 51b may include a folding line 54a. The bending of the outer side portion 51b on the inner side of the inner side portion 51a means that the outer side portion 51b is bent in the direction in which the inner side portion 51a and the outer side portion 51b are folded in a state in which the inner side portion 51a is fixed From the other viewpoint, it can mean that the component in the X-axis direction of the displacement vector indicating the movement of the outer side portion 51b in the state that the inner side portion 51a is fixed has a positive value.

11 and 12, the leads 51 for the first internal connection terminal and the leads 52 for the second internal connection terminal are formed so as to stand on the leads 58a and 58b for the external connection terminals, It is possible to bend upward along the second folding line 57 parallel to the longitudinal direction of the ash 250 (the X-axis direction in Fig. 11). Bending the internal connection terminal leads 51 and 52 upwardly may mean that the component in the Z axis direction of the displacement vector indicating the movement of the leads 51 and 52 for the internal connection terminal has a positive value. For example, the leads 51 for the first internal connection terminal and the leads 52 for the second internal connection terminal are formed so as to be substantially perpendicular to the plane of the lead frame 50 located in the sealing material 250 It is possible to bend along the bifurcated curve 57.

The folding line 57 connecting at least two of the trim holes 56 may be parallel to the longitudinal direction of the encapsulating material 250. The above-mentioned trim holes 56 allow the first trim portion 55a or the second trim portion 55b to be selectively trimmed to facilitate removal. Further, the inner connection terminal leads 51 and 52 are bent upward Trenches, cavities or slits, which have been introduced to facilitate the implementation of the second section curve 57 for the sake of simplicity.

The process of folding and / or folding the internal connection terminal leads 51 and 52 in the battery protection circuit module package 300 shown in FIGS. 10 to 12 may be performed by omitting the pair of electrode tabs 720 The electrode tabs 720a having the first polarity are interposed between the first internal connection terminal leads 51 to be folded and joined to the first internal connection terminal leads 51, And the electrode tab 720b having a bipolarity may be connected to the lead 52 for the second internal connection terminal.

9, when the separation distance between the electrode tab 720a having the first polarity and the electrode tab 720b having the second polarity is the second distance d2, the electrode tab 720b having the second polarity The electrode tab 720a having the first polarity corresponds to the inner portion 51a of the lead 51 for the internal connection terminal, Specifically, the electrode tab 720a having the first polarity is not located on the right side of the folding line 54a connecting the first pair of folding holes 53a, but the second pair And is located on the right side of the folding line 54b connecting the bending holes 53b. In this case, in order to fold the lead 51 for internal connection terminals, the second trim portion 55b of FIG. 6 is selectively trimmed and removed without removing the first trim portion 55a of FIG. 6, The outer side portion 51b can be bent at an angle of 90 degrees inward and finally bent at an angle of 180 degrees. At this time, the folding boundary portion between the inner side portion 51a and the outer side portion 51b may include a folding line 54b. Subsequently, the leads 51 for the first internal connection terminal and the leads 52 for the second internal connection terminal are arranged in parallel with the longitudinal direction of the sealing material 250 so as to be erected with reference to the external connection terminal leads 58a and 58b It can be bent upward along the second curve 57.

Next, a configuration in which the inner side portion 51a is folded on the basis of the outer side portion 51b will be described.

13 is a perspective view of a battery pack according to another embodiment of the present invention in which a battery protection circuit module package having a battery cell protruding from a pair of electrode tabs and a lead for an internal connection terminal, FIGS. 14 and 15 show a battery protection circuit module package according to an embodiment of the present invention, in which the inner side portion is bent outward at an angle of 90 degrees with respect to the outer side of the lead for the internal connection terminal And FIG. 16 is a perspective view of a battery protection circuit module package according to an embodiment of the present invention, in which the inner side is folded from the outer side of the lead for the internal connection terminal, And the terminal leads are further bent upward at an angle of 90 degrees.

Referring to FIG. 13, a battery cell 700 including a pair of protruded electrode tabs 720 is provided. The battery cell 700 includes, for example, a battery cell constituting a polymer battery pack. The pair of electrode tabs 720 has an electrode tab 720a having a first polarity and an electrode tab 720b having a second polarity. The internal connection terminal leads 51 and 52 are electrically connected to the pair of electrode tabs 720. For example, the internal connection terminal lead 51 is electrically connected to the electrode tab 720a having the first polarity while being folded with the electrode tab 720a having the first polarity interposed therebetween, The terminal lead 52 may be electrically connected to the electrode tab 720b having the second polarity.

13 to 15, when the separation distance between the electrode tab 720a having the first polarity and the electrode tab 720b having the second polarity is the third distance d3, The electrode tab 720a having the first polarity corresponds to the outer portion 51b of the lead 51 for internal connection terminal when the tab 720b is first disposed so as to be joined to the lead 52 for the internal connection terminal, , And the electrode tab 720a having the first polarity is located on the left side of the folding line 54a. In this case, in order to fold the lead 51 for internal connection terminals, the first trim portion 55a is selectively trimmed and removed without removing the second trim portion (55b in Fig. 6) The inner side portion 51a can be bent outward at an angle of 90 degrees (see Fig. 14) and finally bent at an angle of 180 degrees (see Fig. 15). At this time, the folding boundary portion between the inner side portion 51a and the outer side portion 51b may include a folding line 54a. Herein, the inner side portion 51a is bent outward with respect to the outer side portion 51b because the inner side portion 51a is bent in the direction in which the outer side portion 51b and the inner side portion 51a are folded while the outer side portion 51b is fixed In other respects, it may mean that the component in the X-axis direction of the displacement vector indicating the movement of the inner side portion 51a in a state where the outer side portion 51b is fixed has a negative value.

15 and 16, the leads 51 for the first internal connection terminal and the leads 52 for the second internal connection terminal are formed so as to be raised with respect to the leads 58a and 58b for the external connection terminals, It is possible to bend upward along the second folding line 57 parallel to the longitudinal direction of the ash 250 (the X-axis direction in Fig. 15). Bending the internal connection terminal leads 51 and 52 upwardly may mean that the component in the Z axis direction of the displacement vector indicating the movement of the leads 51 and 52 for the internal connection terminal has a positive value. For example, the leads 51 for the first internal connection terminal and the leads 52 for the second internal connection terminal are formed so as to be substantially perpendicular to the plane of the lead frame 50 located in the sealing material 250 It is possible to bend along the bifurcated curve 57.

The folding line 57 connecting at least two of the trim holes 56 may be parallel to the longitudinal direction of the encapsulating material 250. The above-mentioned trim holes 56 allow the first trim portion 55a or the second trim portion 55b to be selectively trimmed to facilitate removal. Further, the inner connection terminal leads 51 and 52 are bent upward Trenches, cavities or slits, which have been introduced to facilitate the implementation of the second section curve 57 for the sake of simplicity.

In the battery protection circuit module package 300 shown in FIGS. 14 to 16, the process of bending and / or folding the leads 51 and 52 for the internal connection terminals is performed by omitting the pair of electrode tabs 720 The electrode tabs 720a having the first polarity are interposed between the first internal connection terminal leads 51 to be folded and joined to the first internal connection terminal leads 51, And the electrode tab 720b having a bipolarity may be connected to the lead 52 for the second internal connection terminal.

Hereinafter, a battery pack implemented using the battery protection circuit module package 300 will be described.

17 is a perspective view illustrating a battery protection circuit module package assembly according to another embodiment of the present invention.

Referring to FIG. 17, the battery protection circuit module package assembly 600 according to another embodiment of the present invention includes the battery protection circuit module package 300 and the connector wiring 560 described above. One end of the connector wiring 560 is formed on the external connection terminal leads 58a and 58b exposed in the battery protection circuit module package 300 by laser welding, resistance welding, soldering, a conductive adhesive, And are electrically connected to each other in at least one manner selected from the group. The connector wiring 560 may be provided partially surrounded by the insulating member 540.

FIG. 18 is a perspective view illustrating a structure of an intermediate process for implementing a battery pack according to another embodiment of the present invention, and FIG. 19 is a perspective view illustrating a battery pack according to another embodiment of the present invention.

The battery pack 800 shown in FIG. 18 is a structure shown in an intermediate stage of the manufacturing process and includes a battery cell 700 including a pair of protruded electrode tabs 720a and 720b, (600). Particularly, the lead 51 for the first internal connection terminal of the battery protection circuit module package 300 is formed such that the inner side portion 51a and the outer side portion 51b are folded and the inner side portion 51a and the outer side portion 51b have the first polarity Electrode tabs 720a are interposed. As described above, the options of the trimming / molding process vary according to the interval between the pair of electrode tabs 720a and 720b. For example, the battery protection circuit module package 300 shown in FIG. Or the package shown in Fig.

The first internal connecting terminal lid 51 and the second internal connecting terminal lid 52 are connected to the external connection terminal leads 58a and 58b as shown in Figs. 12 and 16 from the structure shown in Fig. A first step of further bending along a second folding line 56 parallel to the longitudinal direction (X-axis direction) of the encapsulant 250 so as to stand up as a reference and a part of the pair of electrode tabs 720a, The external connection terminal leads 58a and 58b are exposed to the upper side of the battery cell 700 by performing the second step of bending along the third folding line 725 so as to be erected with reference to the direction projected from the external connection terminal 700, And a battery pack (not shown) disposed such that a pair of electrode tabs 720a and 720b protrude from the battery cell 700 (for example, 710 in FIG. 18) 800 are provided. The battery protection circuit module package 300 shown in Fig. 19 can be understood, for example, as the package shown in Fig. 12 or Fig. In the second step, the third folding line 725 is formed in a portion of the pair of electrode tabs 720a and 720b that is not joined to the leads 51 and 52 for the internal connection terminal, and the length of the sealing material 250 Direction (X-axis direction). The first step and the second step may be performed sequentially or in reverse order, and may be performed concurrently.

The battery protection circuit module package and the battery pack according to some embodiments of the present invention have been described above. The battery protection circuit module package described above can be applied, for example, to a battery protection circuit module package for Bluetooth. In the battery protection circuit module package, the size of the battery protection circuit module package is reduced by introducing trim portions and a plurality of pairs of bending holes and folding lines, which can be selectively removed corresponding to various intervals of the electrode tab protruding from the battery cell, It is possible to provide the same without changing according to various intervals of the tab, and it is expected that the advantage of mass production is advantageous. In addition, in correspondence to various intervals of the electrode tab protruding from the battery cell, the inner side or the outer side portion constituting the lead for the internal connection terminal of the battery protection circuit module package is firstly bent in the lateral direction and then bent upward again, It is possible to provide a battery pack in which the protection circuit module package is effectively densely arranged in the battery cell.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

50: Lead frame
51, 52: Lead for internal connection terminal
51a: inner side of lead for internal connection terminal
51b: the outer side of the lead for the internal connection terminal
53a, 53b: Bending hole
54a, 54b: Curve 1
55a, 55b:
56: Trim hole
57: Section 2 Curve
200a: Basic Package
250: Encapsulant
300: Battery protection circuit module package
700: Battery cell
720a, 720b: electrode tabs
800: Battery pack

Claims (13)

A lead frame including leads for internal connection terminals, leads for external connection terminals, and element mounting leads;
A battery protection circuit component mounted on the device mounting lead; And
And an encapsulant for sealing the battery protection circuit component while exposing a part of the lead frame,
The lead for the internal connection terminal includes a lead for a first internal connection terminal and a lead for a second internal connection terminal which are exposed to the outside of the sealing material and can be electrically connected to a pair of electrode tabs of the battery cell and,
The leads for the first internal connection terminal and the leads for the second internal connection terminal may be folded so that any one of the pair of electrode tabs is interposed therebetween,
Wherein the external connection terminal lead and the element mounting lead include a plurality of leads spaced from each other,
Wherein the battery protection circuit component comprises a protection IC, a field effect transistor and at least one passive element,
Wherein the passive element is arranged to connect at least a part of the plurality of spaced apart leads to each other and to electrically connect any two selected from the group consisting of the protection IC, the field effect transistor and the plurality of leads And a battery protection circuit can be configured without using a separate printed circuit board by providing the battery protection circuit module. The method according to claim 1,
The lead for the internal connection terminal of any one of the lead for the first internal connection terminal and the lead for the second internal connection terminal includes an inner side portion and an outer side portion,
Wherein the outer side portion can be folded 180 degrees with respect to the inner side portion so that any one of the pair of electrode tabs is interposed therebetween. 3. The method of claim 2,
Wherein the inner side portion extends to the outside of the sealing member while being connected to the lead for the external connection terminal or the element mounting lead. The method according to claim 1,
The lead for the internal connection terminal of any one of the lead for the first internal connection terminal and the lead for the second internal connection terminal includes an inner side portion and an outer side portion,
Wherein the inner side portion can be folded 180 degrees with respect to the outer side portion so that any one of the pair of electrode tabs is interposed therebetween. 5. The method of claim 4,
Wherein the outer side portion extends to the outside of the sealing member while being connected to the lead for the external connection terminal or the device mounting lead. 6. The method according to any one of claims 2 to 5,
Wherein the inner side is closer to the center of the encapsulant than the outer side. 6. The method according to any one of claims 2 to 5,
Wherein a first folding line between the inner side portion and the outer side portion configured to fold the inner side portion or the outer side portion is parallel to the width direction of the sealing material. The method according to claim 1,
Wherein the leads for the first internal connecting terminal and the leads for the second internal connecting terminal are further bent along a second folding line parallel to the longitudinal direction of the sealing material so as to be erected with respect to the lead for the external connecting terminal, Module Packages. delete The method according to claim 1,
Wherein the electrical connecting member comprises a bonding wire or a bonding ribbon. The method according to claim 1,
The protection IC and the field effect transistor are not inserted and fixed in the form of a semiconductor package on the lead frame but are formed on at least a part of the surface of the lead frame by surface mounting technology, A battery protection circuit module package, which is mounted and fixed in the form of a chip die. A lead frame including leads for internal connection terminals, leads for external connection terminals, and element mounting leads;
A battery protection circuit component mounted on the device mounting lead; And
And an encapsulant for sealing the battery protection circuit component while exposing a part of the lead frame,
The lead for the internal connection terminal includes a lead for a first internal connection terminal and a lead for a second internal connection terminal which are exposed to the outside of the sealing material and can be electrically connected to a pair of electrode tabs of the battery cell and,
Wherein the lead for the first connection terminal and the lead for the second internal connection terminal is connected to the lead for the external connection terminal or the lead for device mounting and extends to the outside of the encapsulation member, Comprising a lateral portion,
Wherein the lead frame is disposed between the inner side portion and the outer side portion and the lead for the external connection terminal or the element mounting lead to connect the inner side portion and the outer side portion to the lead for the external connection terminal or the element mounting lead, Including a trim portion,
Battery protection circuit module package. 13. The method of claim 12,
A first pair of bending holes and a second pair of bending holes spaced apart from each other between the inner side portion and the outer side portion and parallel to the width direction of the sealing material,
Wherein the inner side portion or the outer side portion can be folded along a folding line connecting the first pair of folding holes or a folding line connecting the second pair of folding holes.

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