WO2015178583A1

WO2015178583A1 - Battery protection circuit package capable of being attached to/detached from holder, holder to/from which battery protection circuit package can be attached/detached, and battery pack including same

Info

Publication number: WO2015178583A1
Application number: PCT/KR2015/003152
Authority: WO
Inventors: 나혁휘; 황호석; 김영석; 박성범; 안상훈; 김선호
Original assignee: 주식회사 아이티엠반도체
Priority date: 2014-05-21
Filing date: 2015-03-31
Publication date: 2015-11-26
Also published as: KR101582953B1; KR20150134128A

Abstract

The present invention provides a battery pack comprising a holder to/from which a battery protection circuit package can be attached/detached. The battery protection circuit package that is capable of being attached to/detached from the holder comprises: a substrate; a protection circuit device mounted on the substrate and including a protection IC, a field effect transistor (FET), and at least one manual device; an encapsulate for sealing the protective circuit device and having one surface and another surface that is the opposite surface; a plurality of external connection terminals that do not project to the outside from the encapsulate and are exposed on the one surface of the encapsulate, and which can be electrically connected to an external device; and a first internal connection terminal and a second internal connection terminal that do not project to the outside from the encapsulate and are exposed on the other side of the encapsulate, and which can be electrically connected to a battery bare cell. The holder includes: a body portion including an internal space in which the battery protection circuit package can be inserted and mounted; a first protection circuit contacting portion and a second protection circuit contacting portion having a through hole formed therein to enable the external connection terminals of the battery protection circuit package to be exposed on the upper surface of the body portion, and which can be put in contact and electrically connected to the first internal connection terminal and the second internal connection terminal, respectively, of the battery protection circuit package on the lower surface of the body portion; and a first cell contacting portion and a second cell contacting portion electrically connected to electrode terminals of the battery bare cell, and which can be electrically connected to the first protection circuit contacting portion and the second protection circuit contacting portion, respectively.

Description

A battery protection circuit package detachable to a holder and a holder to which the battery protection circuit package can be detachable, a battery pack comprising the same

The present invention relates to a battery pack, and more particularly, to a battery protection circuit package detachable to a holder and a holder to which the battery protection circuit package can be detachable, and a battery pack including the same.

In general, batteries are used in portable terminals such as mobile phones and PDAs. Lithium-ion batteries are the most widely used batteries in portable terminals and the like. They generate heat during overcharging and overcurrent, and if the heating continues and the temperature rises, performance deterioration and risk of explosion occur. Therefore, in the conventional battery, a protection circuit module for detecting and blocking overcharge, overdischarge, and overcurrent is mounted, or a battery protection circuit package for detecting overcharge, overdischarge, and heat from outside the battery and blocking the operation of the battery is installed. Can be used. However, there is a problem in that the size of a battery pack is limited because the space occupied by protection integrated circuits, FETs, resistors, and capacitors constituting the battery protection circuit package is too large. have.

In addition, in the case of the existing protection circuit, the protection circuit module produced separately for the battery cell is utilized. This is because when a new model is developed, a lot of additional development is required when developing a new model that does not use the existing PCM or PCB. Cost and time are being spent.

The present invention is to solve a number of problems, including the above-described problems, the battery that can be detachable to the holder to reduce the additional cost of development and additional time by making use of the existing developed package for the new model. An object of the present invention is to provide a holder in which a protection circuit package and a battery protection circuit package are detachable, and a battery pack including the same. However, these problems are illustrative, and the scope of the present invention is not limited thereby.

According to one aspect of the invention, the card type battery protection circuit package detachable to the holder is a substrate; A protection circuit element mounted on the substrate and including a protection IC, a field effect transistor (FET) and at least one passive element; An encapsulant which seals the protection circuit element and has the other surface opposite to one surface; A plurality of external connection terminals exposed on one surface of the encapsulant without being protruded from the encapsulant and electrically connected to an external device; And a first internal connection terminal and a second internal connection terminal exposed to the other surface of the encapsulant without being protruded from the encapsulant and electrically connected to the battery bare cell.

The substrate may include a printed circuit board, and the first internal connection terminal, the second internal connection terminal, and the external connection terminal may include a lead frame including a plurality of leads spaced apart from each other.

The substrate, the first internal connection terminal, the second internal connection terminal and the external connection terminal may include a lead frame having a plurality of leads spaced apart.

The battery protection circuit package may have a card type shape that may be inserted into an inner space of the holder.

According to another aspect of the invention, the holder, which can be detachable battery protection circuit package includes a body portion including an internal space that can be inserted and mounted the battery protection circuit package; A through hole through which the external connection terminal of the battery protection circuit package is exposed is formed on an upper surface of the body part, and a first internal connection terminal and a second internal connection terminal of the battery protection circuit package are formed on the lower surface of the body part. A first protective circuit contact and a second protective circuit contact, each of which can be in electrical contact with each other; And a first cell contact part and a second cell contact part electrically connected to electrode terminals of the battery bare cell, the first cell contact part and the second cell contact part being electrically connected to the first protection circuit contact part and the second protection circuit contact part, respectively.

When the battery protection circuit package is inserted into the inner space, the fixing mechanism including an elastic force generated by deforming the shape of the first protective circuit contact portion and the second protective circuit contact portion protruding in the convex shape in the inner space; The battery protection circuit package may be fixed thereto, and the shape of the first protection circuit contact portion and the second protection circuit contact portion may be further modified by interlocking with a detachable device formed in the internal space to control the elastic force so that the internal space is controlled. The battery protection circuit package inserted into and fixed to the inner space may be configured to be detachable.

According to another aspect of the invention, the battery pack comprises a battery bare cell; And a holder disposed on an upper surface of the battery bare cell, wherein the battery protection circuit package may be detachable.

And a battery protection circuit package inserted into the inner space of the holder, wherein the first internal connection terminal of the battery protection circuit package and the first protection circuit contact portion of the holder are in contact with each other, and the first of the holder is provided. The first cell contact portion of the holder, which is connected to the protection circuit contact portion, is in electrical contact with an electrode terminal of a first polarity formed on an upper surface of the battery bare cell, and is electrically connected to the second inside of the battery protection circuit package. A second polarity contact between the connector terminal and the second protective circuit contact portion of the holder and the second cell contact portion of the holder connected to the second protective circuit contact portion of the holder; In contact with the electrode terminal of the, it can be electrically connected.

According to one embodiment of the present invention made as described above, by using a protective circuit package that is standardized as a removable protective circuit package, it is possible to utilize the existing developed protective circuit package for a new model, further development cost and time It is possible to provide a battery protection circuit package and a battery protection circuit package that can be detachable to the holder and the battery protection circuit package can be detachable, the battery pack including the same. Of course, the scope of the present invention is not limited by these effects.

1A to 1C are diagrams illustrating a battery pack according to an embodiment of the present invention.

2A to 2E are configuration diagrams of a battery protection circuit package according to an embodiment of the present invention.

3A to 3D are plan views of respective components of the battery pack according to an exemplary embodiment of the present invention.

4A to 4D are perspective views illustrating components of a battery pack according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms, and the following embodiments are intended to complete the disclosure of the present invention, the scope of the invention to those skilled in the art It is provided to inform you completely. In addition, the components may be exaggerated or reduced in size in the drawings for convenience of description.

Throughout the specification, when referring to one component, such as a film, region or substrate, being positioned on, "connected", "stacked" or "coupled" to another component, said one configuration It may be interpreted that an element may be directly bonded onto, “connected”, “stacked” or “coupled” to another component, or there may be other components interposed therebetween. On the other hand, when one component is said to be located on another component "directly on", "directly connected", or "directly coupled", 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 members, parts, regions, layers, and / or parts, these members, parts, regions, layers, and / or parts are defined by these terms. It is obvious that not. These terms are only used to distinguish one member, part, region, layer or portion from another region, layer or portion. Thus, the first member, part, region, layer or portion, which will be discussed below, may refer to the second member, component, region, layer or portion without departing from the teachings of the present invention.

Also, relative terms such as "top" or "above" and "bottom" or "bottom" may be used herein to describe the relationship of certain elements to other elements as illustrated in the figures. It may be understood that relative terms are intended to include other directions of the device in addition to the direction depicted in the figures. For example, if the device is turned over in the figures, elements depicted as present on the face of the top of the other elements are oriented on the face of the bottom of the other elements. Thus, the exemplary term "top" may include both "bottom" and "top" directions depending on the particular direction of the figure. If the device faces in the other direction (rotated 90 degrees relative 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" may include the plural forms as well, unless the context clearly indicates otherwise. Also, as used herein, "comprise" and / or "comprising" specifies the presence of the mentioned shapes, numbers, steps, actions, members, elements and / or groups of these. It is not intended to exclude the presence or the addition of one or more other shapes, numbers, acts, members, elements and / or groups.

Embodiments of the present invention will now be described with reference to the drawings, which schematically illustrate ideal embodiments of the present invention. In the figures, for example, variations in the shape shown may be expected, depending on manufacturing techniques and / or tolerances. Accordingly, embodiments of the inventive concept should not be construed as limited to the specific shapes of the regions shown herein, but should include, for example, changes in shape resulting from manufacturing.

1A to 1C, the configuration of a battery pack according to an embodiment of the present invention is as follows. First, in FIG. 1A, electrode terminals 12a and B + having a first polarity and electrode terminals 12b and B− having a second polarity may be formed on an upper surface of the battery cell 10. The

electrode terminals

12a and 12b having different polarities may be formed at any position of the upper part of the battery cell 10, and are not necessarily designed at the positions indicated in the drawings.

Referring to FIG. 1B, the holder 30 may be physically fixed to the top surface of the battery cell 10. The holder 30 may include a body part including an inner space such that the battery protection circuit package 20 is detachable. In addition, the holder 30 may be mounted by inserting the battery protection circuit package 20 in the inner space of the body portion, the

external connection terminals

24a, 24b, 24c, 24d of the battery protection circuit package 20 is A through hole 39 that may be exposed may be formed.

The battery protection circuit package 20 may include a plurality of

external connection terminals

24a, 24b, 24c, and 24d on an upper surface thereof. The battery protection circuit package 20 may be inserted into a body part including an inner space of one side of the holder 30 coupled to the top surface of the battery cell 10. A detailed description of the battery protection circuit package 20 will be described later with reference to FIGS. 2A to 2E.

1C is a perspective view illustrating a battery pack 1 in which a battery protection circuit package 20 is inserted into an inner space of a holder 30 physically coupled to an upper surface of the battery cell 10. The

external connection terminals

24a, 24b, 24c, and 24d formed on the upper surface of the battery protection circuit package 20 are exposed through the through holes 39 formed on the upper surface of the holder 30 so as to be electrically connected to the external device. Can be.

Referring to FIG. 2A, the battery protection circuit package 20 according to an embodiment of the present invention may include, for example, a printed circuit board as the substrate 20a. Alternatively, the ceramic substrate and the glass substrate may also be included. In the present invention will be described later by applying a printed circuit board by way of example.

The first internal connection terminal 22a and the second internal connection terminal 22b may be formed at both sides of the substrate 20a, and the

external connection terminals

24a, 24b, 24c, and 24d may be formed of the substrate 20a. It may be formed on the lower surface of the. In addition, the protection circuit element 21 may be formed on the substrate to configure the inside of the battery protection circuit package.

Meanwhile, the first internal connection terminal 22a, the second internal connection terminal 22b, and the

external connection terminals

24a, 24b, 24c, and 24d may include a lead frame having a plurality of leads spaced apart from each other. The leadframe may be made of nickel, copper, nickel plated copper or other metals. Alternatively, a conductive metal plate surface may be applied instead of the lead frame.

The first internal connection terminal 22a and the second internal connection terminal 22b may be disposed on both side surfaces of the substrate 20a and be bent into a "-" shape in a later process. If a lead frame having a plurality of leads is used as a substrate, a conventional battery protection circuit module package may be used as it is. When the substrate is formed of only the lead frame without the printed circuit board, the first internal connection terminal and the second internal connection terminal formed on both sides of the existing battery protection circuit module package may be bent and applied to a "c" shape. In this case, the development cost and time of the new battery protection circuit package may not be consumed much, which is economically advantageous. Detailed description thereof will be described later with reference to FIGS. 2A and 2B.

In addition, a protection circuit element 21 mounted on the substrate 20a and including a protection IC 21c, a field effect transistor (FET) 21b, and at least one passive element 21a is included. can do.

The inside of the protection IC 21c includes a reference voltage setting unit, a comparison unit for comparing the reference voltage with the charge / discharge voltage, an overcurrent detector, and a charge / discharge detector. Here, the criterion for determining the charge and discharge states can be changed to the specification SPEC required by the user, and the charge / discharge state is determined by recognizing the voltage difference for each terminal of the protection IC 21c according to the determined criterion.

When the protection IC 21c reaches an overdischarge state at the time of discharge, the DO terminal goes low to turn off the first FET FET1, and when the overcharge state reaches the overcharge state, the CO terminal goes low and the second FET ( The FET2 is turned off, and when the overcurrent flows, the second FET (FET2) is charged during charging and the first FET (FET1) is turned off when discharging.

The protection circuit according to an embodiment of the present invention described above is exemplary, and the configuration, number, arrangement, and the like of the field effect transistor (FET) 21b or the passive element 21a may be changed according to the additional function of the battery protection circuit package 20. May be modified as appropriate.

The passive element 21a is not inserted into and fixed on the lead frame, but is mounted and fixed on the surface of the lead frame by surface mounting technology. The protection IC 21c and the field effect transistor 21b are not inserted into and fixed in the form of a semiconductor package on the mounting leadframe, but are formed on at least a part of the surface of the mounting leadframe by a surface mounting technique. In the form of a chip die that is not sealed with a separate encapsulant, it may be mounted and fixed. Furthermore, an electrical connection member further includes a bonding wire or a bonding ribbon electrically connecting any two selected from the group consisting of the protection IC 21c, the field effect transistor 21b, and the plurality of mounting leads. By providing, the battery protection circuit package 20 can be configured without using a separate printed circuit board.

In the case of including a mounting lead frame having a plurality of mounting leads spaced apart from the substrate 20a, a battery protection circuit package is formed by arranging an electrical connection member such as a bonding wire or a bonding ribbon on the mounting lead frame. The process of designing and manufacturing the mounting leadframe for constructing (20) has the important advantage that it can be simplified.

If the electrical connection member described in the embodiments of the present invention is not introduced in the configuration of the battery protection circuit, the configuration of the plurality of leads constituting the mounting lead frame becomes very complicated, so that it is easy to effectively provide an appropriate mounting lead frame. You can't.

In the case where the substrate 20a is formed of the mounting lead frame, the protection IC 21c and the field effect transistor 21b are not inserted into and fixed in the form of a semiconductor package on the mounting lead frame, but instead of being fixed. Surface Mounting Technology) may be mounted and fixed on at least a portion of the surface of the mounting leadframe in the form of a chip die sawed from a wafer not sealed with a separate encapsulant. Here, a chip die is implemented by performing a sawing process without sealing a separate encapsulant on a wafer on which a plurality of array-type structures (eg, a protection IC and a field effect transistor) are formed. Mean individual structures. That is, when the protection IC 21c and the field effect transistor 21b are mounted on the mounting lead frame, the protection IC 21c and the field effect transistor 21b are mounted in a state of not being sealed with a separate sealing material, and then the protection is performed by the subsequent sealing material 26. Since the IC 21c and the field effect transistor 21b are sealed, the process of forming the encapsulant 26 may be performed only once in implementing the battery protection circuit package 20. In contrast, when the passive element 21a, the protection IC 21c, and the field effect transistor 21b are separately inserted and fixed or mounted on a printed circuit board, one molding process is required for each component first. Since another molding process is additionally required for each component mounted after being fixed or mounted on a printed circuit board, the manufacturing process is complicated and the manufacturing cost is high.

Furthermore, when the lead frame is used in the device package of the battery protection circuit package according to the above-described embodiment of the present invention, the overall height is increased as compared with the case in which the protection circuit element 21 is mounted on the printed circuit board (PCB). It can be expected to dramatically reduce the effect. That is, since the printed circuit board typically has a thickness of about 2 mm, the lead frame has a thickness of about 0.8 mm, so that the battery can be miniaturized by the thickness difference or the battery size can be increased by the thickness difference. Can be implemented.

2A and 2B, the protection circuit element 21 is sealed using the sealing material 26. As shown in FIG. The encapsulant 26 may include, for example, an epoxy molding compound (EMC).

A plurality of

external connection terminals

24a, 24b, 24c, and 24d exposed to only one surface of the encapsulant 26 without protruding from the encapsulant 26 to the outside and electrically connected to an external device, and the The first internal connection terminal 22a exposed only to the other surface of the encapsulant 26 without being protruded from the encapsulant 26 and electrically connected to the battery bare cell 10. And a second internal connection terminal 22b.

In addition, the first internal connection terminal 22a and the second internal connection terminal 22b may also be exposed only to one surface of the encapsulant 26 without protruding from the encapsulant 26 to the outside. Insertion of the battery protection circuit package 20 into the holder to be coupled can be facilitated.

The first internal connection terminal 22a and the second internal connection terminal 22b may be connected to a charger during charging, and may be connected to an electronic device (eg, a mobile terminal, etc.) operated by battery power during discharge. First to third external connection terminals (P +, CF, P-) are provided. Here, the first external connection terminal P + and the third external connection terminal P- among the first to third external connection terminals P +, CF, and P- are for power supply, and the other external connection terminal is provided. The second external connection terminal CF may be configured to charge the battery by classifying the battery. In addition, thermistor, a component that senses battery temperature during charging, can be applied. Other functions can be applied and used as terminals.

In the present invention, the fourth external connection terminal (NFC) is further formed as an embodiment, and may support near field communication (NFC). The added NFC circuit may include, for example, an NFC connection terminal and an NFC matching element. The NFC antenna may be, for example, an antenna in a loop form. When the end of the NFC antenna is in contact with the NFC connection terminal, the NFC matching element and the NFC antenna can be electrically connected to form a closed loop (closed loop). The NFC matching element may be, for example, a capacitor for frequency matching. For example, both ends of the NFC loop antenna are connected to the capacitor which is the NFC matching element to form a closed loop, and by using the resonance generated from the NFC antenna and the capacitor to generate a frequency region for NFC communication of 13.56 MHz Communicate with the device. Of course, the technical idea of the present invention is not limited to the exemplary number, arrangement and use of the

external connection terminals

24a, 24b, 24c, and 24d shown in the drawings.

Meanwhile, when the battery protection circuit package 20 is provided with an electrical connection member, the battery protection circuit package 20 may be configured using only a lead frame without a separate printed circuit board. At this time, the lead frame can be used long in the longitudinal length direction. A first internal connection terminal 22a and a second internal connection terminal 22b may be formed on both side surfaces of the lead frame, and a plurality of external parts are formed between the first and second

internal connection terminals

22a and 22b. The

connection terminals

24a, 24b, 24c and 24d and the protection circuit element 21 may be formed. As shown in FIG. 2B, the first and second

internal connection terminals

22a and 22b formed on both sides of the lead frame are bent in a “c” shape to form the first internal connection terminal 22a and the second, respectively. After forming the internal connection terminal 22b in a bent shape, the battery protection circuit package 20 may be formed by molding the encapsulant 26 as described above.

2C to 2E illustrate top, side, and bottom surfaces of the battery protection circuit package. Referring to FIG. 2C, the first internal connection terminal and the second internal connection terminal 22a shown in FIG. 2B are illustrated. 22b) may be formed on both sides of the battery protection circuit package. In addition, one side edge portion of the battery protection circuit package 20 sealed with the encapsulant 26 is etched and cut. This indicates the insertion direction of the battery protection circuit package 20, and the method of displaying the insertion direction on the battery protection circuit package 20 according to the efficiency of the process, the shape, position and number, etc. of the display may be modified. have.

Referring to FIG. 2D, the side surface of the battery protection circuit package is illustrated. As shown in FIG. 2C, the first internal connection terminal 22a and the second internal connection terminal 22 may be formed at both sides of the battery protection circuit package 20. 22b) can be formed. The first and second

internal connection terminals

22a and 22b may be formed to be bent into a "-" shape, respectively, and may be used by bending a lead frame substrate applied to the battery protection circuit package 20.

Referring to FIG. 2E, the bottom surface of the battery protection circuit is illustrated, and the

external connection terminals

24a, 24b, 24c, and 24d, like the first and second

internal connection terminals

22a and 22b illustrated in FIG. 2C, are illustrated. Sealed by the encapsulant 26, the plurality of

external connection terminals

24a, 24b, 24c, 24d are exposed without protruding from the encapsulant 26 to the outside. The

external connection terminals

24a, 24b, 24c, and 24d may be configured of, for example, P +, P-, CF, and NFC terminals. The

external connection terminals

24a, 24b, 24c, and 24d are not necessarily configured as four, and according to the purpose of the

external connection terminals

24a, 24b, 24c and 24d, the

external connection terminals

24a, 24b and 24c. , 24d) may be reduced or increased. The positions may also be arranged in any order.

For example, any of the three external connection terminals selected from the

external connection terminals

24a, 24b, 24c, and 24d may sequentially have the first to third external connection terminals P +, CF, and P− shown in FIG. 2E. Or may be arranged in any order. The order of arrangement of the first to third external connection terminals may vary. The number or use of the

external connection terminals

24a, 24b, 24c, and 24d may be appropriately changed according to the configuration of the battery protection circuit package.

3A is a top view of the holder 30 coupled to the battery pack. The holder 30 may include a body part 30a, protective

circuit contact parts

34a and 34b,

cell contact parts

36a and 36b, and an inner space 38 inside the body part 30a.

A plurality of through holes 39 are formed on the upper surface of the body part 30a, and the external connection terminals of the battery protection circuit package, which can be inserted later through the through holes 39, may be exposed to be connected to external devices. Can be. First and second

protection circuit contacts

34a and 34b may be formed on the bottom surface of the internal space 38. In addition, a detachment device 32 capable of detaching the battery protection circuit package 20 may be formed adjacent to the second protection circuit contact portion 34b formed on the right side of FIG. 3A.

In addition, the through hole 39 formed on the upper surface of the body part 30a has only the surface of the terminals of the external connection terminals formed on the upper surface of the battery protection circuit package when the battery protection circuit package is inserted and mounted to expose the external device. And may be electrically connected with.

The detaching device 32 is formed in the internal space 38 of the body part 30a, and the detaching device 32 is provided with, for example, a spring provided inside the detaching device 32 such that the battery protection circuit package ( 20 is attached when a predetermined pressure is applied to the surface of the detaching device 32, and when the predetermined pressure is again applied to the surface of the detaching device 32 by the battery protection circuit package. Has a resilient force and a switch system can be used in which the battery protection circuit package can be removed. However, the present invention is not limited to only the above-described switch system, but may be applicable to any removable device 32 capable of removing or attaching the battery protection circuit package. The battery protection circuit package is inserted into and fixed in the holder 30, and the process of detaching the battery protection circuit package 20 from the holder 30 by the detaching device 32 will be described below with reference to FIGS. 3B and 3C. .

3B is a side view of a holder constituting a battery pack according to an embodiment of the present invention, and FIG. 3C is a side view illustrating a battery protection circuit package inserted into an inner space of the holder.

Referring to FIGS. 3B and 3C, an internal space 38 that may be mounted by inserting the battery protection circuit package 20 into the body part 30a may be included. A detachable device 32 capable of detaching the battery protection circuit package 20 inserted into the inner space 38 is located on the other side of the battery compartment 20 on the opposite side to which the battery protection circuit package 20 of the inner space 38 is inserted. Can be formed.

The first internal connection terminal 22a and the second internal connection terminal 22b of the battery protection circuit package 20 inserted into the internal space 38 of the body part 30a are disposed on the lower surface of the internal space 38. The first and second

protective circuit contacts

34a and 34b may be formed to be electrically connected to each other. The first and second

protection circuit contacts

34a and 34b are formed to protrude in a convex shape in the internal space 38 of the body part 30a perpendicular to the top surface of the battery bare cell 10. For example, the convex shape may be one that is bent in an inverted V shape. However, the shape of the above-described protective

circuit contact portions

34a and 34b is exemplary, and the shape of the protective

circuit contact portions

34a and 34b is not necessarily used in an inverted V shape, and the inside of the battery protection circuit package 20 such as a hemispherical shape. All structures protruding in electrical contact and convex shape with the

connection terminals

22a and 22b are applicable.

For example, referring to FIG. 3C, a process of inserting and fixing the battery protection circuit package 20 into the holder 30 is performed when the battery protection circuit package 20 is inserted into the internal space 38. The battery protection circuit by a fixing mechanism including an elastic force generated while the shape of the first protection circuit contact portion 34a and the second protection circuit contact portion 34b protruding in a convex shape in the inner space 38 is deformed. The package 20 may be fixed, and the shape of the first protective circuit contacting portion 34a and the second protective circuit contacting portion 34b is further interlocked with the detachable device 32 formed in the inner space 38. The battery protection circuit package 20 that is deformed and inserted into and fixed to the internal space 38 by controlling the elastic force may be configured to be detached from the internal space 38.

According to another embodiment of the present invention, the battery protection circuit package 20 is inserted into the internal space 38 of the body portion 30a. The detachable device 32 may be moved backward or elastically and its shape may be deformed by the inserted battery protection circuit package 20. At the same time, when the primary pressing force is transmitted to one side of the battery protection circuit package 20 which is not fixed, the first and second protection circuit contact portions 34a formed in the internal space 38 of the body portion 30a, The protruding shape of 34b) is pressurized by the battery protection circuit package 20. As a result of the pressure, the shape of the first and second

protective circuit contacts

34a and 34b is protected by the contact surface of the first protective circuit contact 34a and the second protective circuit contact 34b as shown in FIG. 3C. The battery protection circuit package 20 is fixed by the elastic force applied to the circuit package 20 and deformed into a plate shape and applied to the first and second protection

circuit contact portions

34a and 34b.

Meanwhile, when the secondary pressing force is transmitted to the battery protection circuit package 20 inserted into the internal space 38, the first protection circuit contact portion is interlocked with the detachable device 32 formed in the internal space 38. 34a) and the shape of the second protection circuit contact portion 34b are deformed to control the elastic force so that the battery protection circuit package 20 is detached from the internal space 38.

In addition, the first cell contact part 36a and the first cell contact part 36a and the second electrode electrode 12a and the second polarity electrode terminal 12b formed on the upper surface of the battery bare cell 10 may be electrically connected to each other. The two cell contact portion 36b may be formed on the bottom surface of the holder 30. The

cell contacts

36a and 36b may be electrically connected to the first and second

protection circuit contacts

34a and 34b respectively formed in the internal space 38 of the body part 30a. The size of the internal space 38 may be designed differently according to the size of the battery protection circuit package 20, and the first internal connection of the battery protection circuit package 20 regardless of the position of the

cell contacts

36a and 36b. According to the position of the terminal 22a and the second internal connection terminal 22b, the internal structure of the holder 30 is deformed to allow the design.

In other words, when the battery protection circuit package 20 is inserted and fixed, the first internal connection terminal 22a of the battery protection circuit package 20 is formed in the holder 30, and the first protection circuit contact portion 34a is provided. Contact with and electrically connected. The first protection circuit contact portion 34a is previously connected to the first cell contact portion 36a formed on the lower surface of the holder 30, and the first cell contact portion 36a is connected to the upper surface of the battery bare cell 10. The electrode terminal 12a of the first polarity is formed to be electrically connected.

On the other hand, the second internal connection terminal 22b of the battery protection circuit package 20 is in electrical contact with the second protection circuit contact portion 34b formed on the holder 30. The second protective circuit contact portion 34b is previously connected to the second cell contact portion 36b formed on the lower surface of the holder 30, and the second cell contact portion 36b is connected to the upper surface of the battery bare cell 10. The electrode terminal 12b of the second polarity which is formed is contacted and electrically connected.

FIG. 3D illustrates a part of the battery bare cell 10 in which an electrode terminal 12a of a first polarity and an electrode terminal 12b of a second polarity are formed on an upper surface of the battery bare cell 10. Drawing. In general, the battery bare cell may include one or at least two unit cells capable of charging and discharging. Here, the unit cell may be a secondary battery, for example, may be a lithium secondary battery. The plurality of unit cells may be connected to each other in series or in parallel to form a core pack (not shown). Of course, the number or connection method of the unit cells constituting the core pack is not limited to this and can be configured in various ways. Such a core pack may supply power to various electronic devices, including, for example, mobile terminals such as mobile phones, smart phones, PDAs, smart pads, and tablet computers.

The battery core pack may be understood as a battery bare cell in which a positive electrode plate and a negative electrode plate include an electrode assembly in which a separator is wound, and a cap assembly sealing the electrode assembly while exposing the positive electrode terminal and the negative electrode terminal.

The electrode assembly may include, for example, a positive electrode plate formed by applying a positive electrode active material to a positive electrode current collector, a negative electrode plate formed by applying a negative electrode active material to a negative electrode current collector, and interposed between the positive electrode plate and the negative electrode plate to prevent short circuit between two positive electrode plates, and It may consist of a separator that enables the movement of ions. The positive electrode tab attached to the positive electrode plate and the negative electrode tab attached to the negative electrode plate are drawn out to the electrode assembly.

The cap assembly includes a cathode terminal, a gasket, a cap plate, and the like. The cap plate may serve as a positive terminal. The negative electrode terminal may be referred to as a negative electrode cell or an electrode cell. The gasket may be formed of an insulating material to insulate the negative electrode terminal and the cap plate. Therefore, the electrode unit of the battery core pack may include a negative electrode terminal and a cap plate. That is, the electrode portion of the battery core pack includes a plate of a first polarity (for example, an anode) and an electrode cell of a second polarity (for example, a cathode) disposed in the center of the plate.

However, in the exemplary embodiment of the present invention, when the holder 30 illustrated in FIGS. 3A to 3C is applied and coupled to an existing battery bare cell, the first cell contact part formed on the lower surface of the holder 30 may be used. Interference of regions of 36a and second cell contacts 36b may occur. Short may occur due to the interference, and thus may not function as a battery bare cell.

Therefore, in the present invention, the electrode terminal 12a of the first polarity and the electrode terminal 12b of the second polarity of the battery bare cell 10 are formed to form the first cell contact portion 36a and the second of the holder 30. Instead of being connected to the cell contact part 36b by welding or the like, the cell contact part 36b is physically contacted to make an electrical connection. In addition, since not only the holder 30 and the battery bare cell 10 but also the battery protection circuit package 20 inserted into the holder 30 are physically coupled, they are coupled by physical contact, not by soldering or welding. . The position of the terminals included in each component may be designed by changing its position or changing its shape according to convenience and efficiency aspects of the manufacturing process. For example, the first cell contact portion 36a and the second cell contact portion 36b of the holder 30 and the electrode terminal 12a of the first polarity and the electrode terminal 12b of the second polarity of the battery bare cell 10 are provided. ) Can be designed to vary.

The holder 30 is disposed on the top surface of the battery bare cell 10 to be physically coupled. For example, the combination of the holder 30 and the battery bare cell 10 may be connected by a hook (not shown), and other modifications that may fix the holder 30 may be applied.

Since the lead of the battery protection circuit package 20 constitutes the battery pack 1 by physical contact instead of the connection by soldering or welding, there is a probability that the battery protection circuit package 20 is damaged by heat by soldering or welding. Is low. Existing battery protection circuit packages can be used, which saves additional wasted development costs and time.

Finally, the holder 30 is physically coupled to the upper surface of the battery bare cell 10, and the battery protection circuit package 20 is inserted into the internal space 38 formed in the body part 30a of the holder 30. And mounted, and the

external connection terminals

24a, 24b, 24c, and 24d of the battery protection circuit package 20 are exposed through the through holes 39 formed in the holder 30, thereby electrically connecting with external devices. Combined so that they can be connected, a battery pack is manufactured. The battery pack may generally be understood as a battery inserted into a mobile phone or a terminal.

Here, the specific structure or technology for the battery bare cell is already well known and the detailed description thereof will be omitted.

4A and 4B, FIG. 4A is a perspective view illustrating a holder 30 according to an embodiment of the present invention, and FIG. 4B is a cross-sectional view taken along AA ′ of the holder 30 of FIG. 4A. It is a perspective view shown. The holder 30 includes a body portion 30a having an inner space 38 into which the battery protection circuit package 20 can be inserted into one side of the holder 30. The first protection circuit contact portion 34a and the second protection circuit contact portion 34b are formed at the lower end of the inner space 38 formed in the body portion 30a, and the first protection circuit contact portion 34a and the second protection portion are formed. The circuit contacts 34b are spaced apart by a predetermined distance. In addition, a detachment device 32 is disposed adjacent to the second protection circuit contact portion 34b to detach the battery protection circuit package 20. In addition, a plurality of through holes 39 are formed on the upper surface of the body portion 30a to expose the

external connection terminals

24a, 24b, 24c, and 24d of the battery protection circuit package 20.

4C is a perspective view illustrating a battery protection circuit package, and shows a battery protection circuit package 20 having a card type having a rectangular parallelepiped shape. A first internal connection terminal 22a and a second internal connection terminal 22b are formed on lower surfaces of both sides of the battery protection circuit package 20, and the first internal connection terminal 22a and the second internal connection are formed. The terminals 22b of the

internal connection terminals

22a and 22b may not be protruded by the encapsulant 26 and electrically contact the

electrode terminals

12a and 12b having different polarities of the battery bare cells 10, respectively. Only the surface is exposed.

In addition, the plurality of

external connection terminals

24a, 24b, 24c, and 24d on the upper surface of the battery protection circuit package 20 may not be protruded by the encapsulant 26 to make electrical contact with external devices. Only the surfaces of the

external connection terminals

24a, 24b, 24c and 24d are exposed.

In addition, the edge portion of the battery protection circuit package 20 is etched to indicate the insertion direction of the battery protection circuit package 20.

Finally, FIG. 4D illustrates a battery protection circuit package 20 inserted into a holder 30 that is disposed on and physically coupled to an upper surface of a battery bare cell (not shown). The battery protection circuit package 20 is inserted into and mounted in the internal space 38 of the holder 30. Only the surface of the terminal is exposed so that a part of the first internal connection terminal 22a of the inserted battery protection circuit package 20 does not protrude out through an opening (not shown) formed in one side of the holder, and the battery protection circuit package

External connection terminals

24a, 24b, 24c, and 24d of 20 are exposed to be able to contact external devices through the through holes 39 formed in the holder 30.

As described above, in the case of the existing protection circuit package, the PCM (package circuit module) individually produced for each battery bare cell is used as in the conventional configuration. When a new model is developed, the new PCM cannot use the existing PCM. There is a problem that additional development costs and time are wasted when developing a model.

In order to solve the above problems, by using a battery protection circuit package standardized as a secondary battery protection circuit package to be detachable, additional development costs can be made by utilizing a battery protection circuit package developed for a new model. Economical effect can be reduced by reducing time and waste.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims

Board;

A protection circuit element mounted on the substrate and including a protection IC, a field effect transistor (FET) and at least one passive element;

An encapsulant which seals the protection circuit element and has the other surface opposite to one surface;

A plurality of external connection terminals exposed on one surface of the encapsulant without being protruded from the encapsulant and electrically connected to an external device; And

A first internal connection terminal and a second internal connection terminal exposed on the other surface of the encapsulant without being protruded from the encapsulant and electrically connected to the battery bare cell;

Including,

Battery protection circuit package detachable from holder.
The method of claim 1,

The substrate includes a printed circuit board (Printed Circuit Board),

And the first internal connection terminal, the second internal connection terminal, and the external connection terminal include a lead frame having a plurality of leads spaced apart from each other.
The method of claim 1,

The substrate, the first internal connection terminal, the second internal connection terminal and the external connection terminal includes a lead frame having a plurality of leads spaced apart, removable battery protection circuit package.
The method of claim 1,

The package has a card type shape that can be inserted into the inner space in the holder, removable battery protection circuit package.
As the holder of the battery protection circuit package according to any one of claims 1 to 4 can be detachable,

A body part including an internal space in which the battery protection circuit package may be inserted and mounted;

Through-holes are formed on the upper surface of the body portion to expose the external connection terminal of the battery protection circuit package,

A first protection circuit contact and a second protection circuit contact that may be electrically connected to the first internal connection terminal and the second internal connection terminal of the battery protection circuit package, respectively, on a lower surface of the body part; And

A first cell contact portion and a second cell contact portion electrically connected to electrode terminals of the battery bare cell, the first cell contact portion and the second cell contact portion being electrically connected to the first protection circuit contact portion and the second protection circuit contact portion, respectively;

Including a holder, the battery protection circuit package may be removable.
The method of claim 5,

When the battery protection circuit package is inserted into the inner space, the fixing mechanism including an elastic force generated by deforming the shape of the first protective circuit contact portion and the second protective circuit contact portion protruding in the convex shape in the inner space. By the battery protection circuit package can be fixed,

The battery protection circuit package interlocked with the detachable device formed in the inner space to further modify the shape of the first protection circuit contact portion and the second protection circuit contact portion to control the elastic force to insert and fix the battery protection circuit package inserted into the internal space. Configured to be removable from the space,

Holder for battery protection circuit package to be detachable.
A battery bare cell; And

A holder disposed on an upper surface of the battery bare cell, wherein the battery protection circuit package according to claim 5 may be detachable;

Including, a battery pack.
The method of claim 7, wherein

Further comprising a battery protection circuit package according to claim 1, which is inserted into the interior space of the holder,

The first cell contact portion of the holder connected to the first internal connection terminal of the battery protection circuit package and the first protection circuit contact portion of the holder and connected to the first protection circuit contact portion of the holder is connected to the battery bare. Contact with the electrode terminal of the first polarity formed on the upper surface of the cell, and are electrically connected

The second cell contact portion of the holder connected to the second internal connection terminal of the battery protection circuit package and the second protection circuit contact portion of the holder is connected to the second protection circuit contact portion of the holder. In contact with the electrode terminal of the second polarity located in the center of the cell upper surface, and electrically connected,

Battery pack.