KR101024387B1 - Battery pack for secondary battery - Google Patents

Abstract

A battery pack for a secondary battery is provided. In the battery pack for a secondary battery according to an exemplary embodiment of the present invention, a first terminal hole and a second terminal hole are formed to allow the first cell and the second electrode to conduct electricity with a battery cell having a first electrode and a second electrode on one surface thereof. A first power supply terminal and a second power supply terminal, and a first power supply terminal and a first power supply terminal that are electrically connected to the first electrode and the second electrode through a plate-like sheet fixed to one end surface of the battery cell, the first terminal hole, and the second terminal hole, respectively. And an upper case accommodating the power supply terminal and the second power supply terminal, respectively, and configured to receive a circuit board and a circuit board, respectively, and to cover one end of the battery cell. The first power supply terminal and the second power supply terminal each include a first electrode. And a first coupling portion coupled to the second electrode and a support portion bent vertically from the first coupling portion to support the circuit board spaced apart from the sheet, wherein the upper case has a protrusion formed on a side surface of the sheet. A protrusion formed on an inner side surface of the upper case in a locking step formed at both sides of a bent portion of the first power terminal and the second power terminal, inserted into a hole penetrating the groove or side surface formed in the inner side of the case; Is caught and combined.

Secondary Cells, Batteries, Packs, PTCs

Description

Battery pack for secondary battery {Battery pack for secondary battery}

The present invention relates to a battery pack for a secondary battery, and more particularly, to a secondary battery battery pack having a strong bonding force can be reduced component cost and labor costs.

In general, a battery used in a portable digital device uses a battery pack for a secondary battery that can be charged and discharged. Representative examples of such battery packs for secondary batteries include lithium ion batteries, nickel cadmium batteries, nickel metal hydride batteries, nickel hydrogen batteries, lithium battery packs, etc., which can be used semi-permanently.

Such battery packs for secondary batteries have been manufactured in an inner pack type in accordance with the recent trend of light and thin. In particular, most battery packs mounted on mobile phones are manufactured in an inner pack type.

Various assembly structures have been proposed in the related art with respect to such a rechargeable battery pack. The common purpose of the proposed methods was to reduce the cost of man-made parts and to lower the cost of the product, while at the same time improving the binding capacity of the battery pack.

The present invention is to propose a coupling structure of a battery pack for a secondary battery having a strong bonding force as well as reducing the assembly cost.

The present invention has been devised to improve the above problems, and an object of the present invention is to provide a battery pack for a secondary battery having a low bonding cost and a strong bonding force.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a battery pack for a secondary battery according to an embodiment of the present invention comprises a battery cell having a first electrode and a second electrode on one end; A plate-like sheet having a first terminal hole and a second terminal hole formed therein so as to conduct electricity with the first electrode and the second electrode, and fixed to one end surface of the battery cell; A first power supply terminal and a second power supply terminal which are coupled to and energize the first electrode and the second electrode through the first terminal hole and the second terminal hole, respectively; A circuit board electrically coupled with the first power terminal and the second power terminal; And an upper case accommodating the circuit board and covering one end of the battery cell, wherein the first power supply terminal and the second power supply terminal are coupled to the first electrode and the second electrode, respectively. And a support portion bent vertically from the first coupling portion to support the circuit board spaced apart from the sheet, wherein the upper case includes a groove having a protrusion formed on a side surface of the sheet on an inner side surface of the upper case; It is inserted into the hole penetrating the side and is fitted into the sheet, the projection formed on the inner side of the upper case is coupled to the engaging jaw formed on both sides of the bent portion of the first power terminal and the second power terminal. .

In order to achieve the above object, a battery pack for a secondary battery according to an embodiment of the present invention comprises a battery cell having a first electrode and a second electrode on one end; A plate-like sheet having a first terminal hole and a second terminal hole formed therein so as to conduct electricity with the first electrode and the second electrode, and fixed to one end surface of the battery cell; A first power supply terminal and a second power supply terminal which are coupled to and energize the first electrode and the second electrode through the first terminal hole and the second terminal hole, respectively; A circuit board electrically coupled with the first power terminal and the second power terminal; And an upper case accommodating the circuit board and covering one end of the battery cell, wherein the first power supply terminal and the second power supply terminal are coupled to the first electrode and the second electrode, respectively. And a support portion bent vertically from the first coupling portion to support the circuit board spaced apart from the sheet, wherein the upper case is formed in a bent portion of the extension portion bent vertically extending from the side of the sheet. Or a protrusion formed at a side surface of the upper case is inserted into a hole and fitted to the sheet, and is provided at an inner side surface of the upper case at a locking jaw formed at both sides of a bent portion of the first power terminal and the second power terminal. The formed projections are hooked together.

In order to achieve the above object, a battery pack for a secondary battery according to an embodiment of the present invention comprises a battery cell having a first electrode and a second electrode on one end; A plate-like sheet having a first terminal hole and a second terminal hole formed therein so as to conduct electricity with the first electrode and the second electrode, and fixed to one end surface of the battery cell; A first power supply terminal and a second power supply terminal which are coupled to and energize the first electrode and the second electrode through the first terminal hole and the second terminal hole, respectively; A circuit board electrically coupled with the first power terminal and the second power terminal; And an upper case accommodating the circuit board and covering one end of the battery cell, wherein the first power supply terminal and the second power supply terminal are coupled to the first electrode and the second electrode, respectively. And a support portion bent vertically from the first coupling portion to support the circuit board spaced apart from the sheet, wherein the upper case includes a groove having a protrusion formed on a side surface of the sheet on an inner side surface of the upper case; A hole which is inserted into a hole penetrating the side surface and fits with the sheet, and a locking protrusion formed at both sides of the support part of the first power terminal and the second power terminal passes through a groove or a side formed in the inner surface of the upper case; Inserted into and combined.

In order to achieve the above object, a battery pack for a secondary battery according to an embodiment of the present invention comprises a battery cell having a first electrode and a second electrode on one end; A plate-like sheet having a first terminal hole and a second terminal hole formed therein so as to conduct electricity with the first electrode and the second electrode, and fixed to one end surface of the battery cell; A first power supply terminal and a second power supply terminal which are coupled to and energize the first electrode and the second electrode through the first terminal hole and the second terminal hole, respectively; A circuit board electrically coupled with the first power terminal and the second power terminal; And an upper case accommodating the circuit board and covering one end of the battery cell, wherein the first power supply terminal and the second power supply terminal are coupled to the first electrode and the second electrode, respectively. And a support portion bent vertically from the first coupling portion to support the circuit board spaced apart from the sheet, wherein the upper case is formed in a bent portion of the extension portion bent vertically extending from the side of the sheet. Or a groove formed in the side of the upper case is inserted into the hole is coupled to the seat, the engaging projection formed on both sides of the support portion of the first power terminal and the second power terminal groove formed in the inner surface of the upper case Or inserted into and coupled to a hole passing through the side surface.

According to the battery pack for a secondary battery of the present invention as described above has one or more of the following effects.

First, since a battery pack for a secondary battery including a circuit board may be assembled using a plate-shaped sheet having a simple shape, the cost of parts may be reduced.

Second, it is possible to reduce the cost by using a general bar type PTC rather than a special type in a narrow internal space.

Third, there is also an advantage that the bonding force can be improved by combining the upper case with the seat and the electrode terminal.

Details of the embodiments are included in the detailed description and drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, the present invention will be described with reference to the drawings for describing a battery pack for a secondary battery according to embodiments of the present invention.

1 is a view showing an exploded perspective view of the components except the upper case in the battery pack for a secondary battery according to an embodiment of the present invention, Figure 2 is a battery pack for a secondary battery according to an embodiment of the present invention 3 is a view illustrating a first electrode terminal and a second electrode terminal coupled to a sheet, and FIG. 3 is a view illustrating an upper case and a state in which each component separated in FIG. 1 is combined.

The battery pack for a secondary battery according to an exemplary embodiment of the present invention includes a battery cell 110, a sheet 120, a first power terminal 150, a second power terminal 160, a circuit board 130, and an upper case. It can be configured to include (170).

As shown, the battery cell 110 has a flat rectangular parallelepiped shape, and a first electrode 111 and a second electrode 112 are formed at one end thereof. The battery cell 110 discharges power charged or charged through these electrodes 111 and 112. The first electrode 111 and the second electrode 112 may be a cathode and an anode, respectively. As shown, the positive electrode may be configured to be flat on one surface of the battery cell 110, and the negative electrode may protrude convexly. Hereinafter, the first electrode 111 will be described as a cathode, and the second electrode 112 will be defined as an anode.

The sheet 120 is fixed to cover one end surface of the battery cell 110 in which the negative electrode 111 and the positive electrode 112 are formed in a plate shape. Preferably, a double-sided tape (not shown) is inserted between one end surface of the battery cell 110 and the sheet 120 to strongly fix the sheet 120 to the battery cell 110. In addition, the sheet 120 has a first terminal hole 121 and a second terminal hole 122 so that the negative electrode 111 and the positive electrode 112 of the battery cell 110 may be exposed to the outside through the sheet 120. This can be formed. The sheet 120 may be made of PVC, which is an insulating material, to block current from flowing in the sheet 120.

The first power supply terminal 150 and the second power supply terminal 160 serve to conduct current between the circuit board 130 and the cathode 111 and the anode 112 of the battery cell 110, respectively. Hereinafter, the first power supply terminal 150 will be referred to as a negative power supply terminal and the second power supply terminal 160 will be referred to as a positive power supply terminal.

1 illustrates a structure of a battery pack for a secondary battery of a type further including a PTC element 140. The PTC device 140 is a device for preventing overcurrent, and serves to protect the circuit and components from overcurrent by electrically blocking the current when an abnormal current flows into the circuit. Although it will be described later, in the present invention, a battery pack for a secondary battery can be assembled using a non-special type PTC (140) type bar 140 in a narrow internal space, thereby reducing costs.

The circuit board 130 receives external power from the charger (not shown) through the power supply terminal 132 to supply external power through the negative terminal 131 and the positive terminal 132 of the circuit board 130. The battery cell 110 is applied. At this time, the circuit board 130 serves to protect the battery cell 110 from the input power applied from the charger. That is, the circuit board 130 is a protection circuit module (PCM) that protects the battery cell 110 from pulsating current.

FIG. 1A illustrates the coupling of the PTC element 140 and the negative power supply terminal 150 and the positive power supply terminal 160 to the circuit board 130. First, the bar type general PTC 140 and the negative power supply terminal are coupled. The 150 is bonded by spot welding, and then the bonded assembly is bonded to a portion of the negative electrode terminal 131 formed at one end of the circuit board 130 by soldering or other metal fusion. In addition, the anode power terminal 160 is coupled to the portion of the anode terminal 132 formed at the end of the opposite side of the circuit board 130 in the same manner as the cathode.

Shapes of the negative electrode power supply terminal 150 are bent by the letter 'b' as shown in FIGS. 1 and 2, and the first coupling part 151 and the first coupling part that are coupled to the negative electrode 111 of the battery cell 110. It may be formed as a support 155 that is bent vertically from the coupling portion 151 to support the circuit board 130. Although described later, the support 155 may support the circuit board 130 at a predetermined distance from the sheet 120.

Similarly, the shape of the positive power supply terminal 160 may be the shape as shown in FIGS. 1 and 2, wherein the first coupling part 161 and the first coupling part 161 coupled to the positive electrode 122 of the battery cell 110 are provided. And a support part 165 that is bent vertically from the coupling part 161 to space the support of the circuit board 130. It is coupled with the positive terminal 132 of.

FIG. 1B illustrates an assembly in which the PTC device 140, the cathode power terminal 150, and the anode power terminal 160 are coupled to the circuit board 130 along the length of the circuit board 130. In addition, the assembly including the circuit board 130 may be coupled to the electrodes 111 and 112 of the battery cell 110 exposed through the terminal holes 121 and 122 of the sheet 120.

First, as shown in FIG. 1B, the first coupling part 151 of the negative electrode power terminal 150 may be spot welded or lasered to the negative electrode 111 exposed through the first terminal hole 121 of the sheet 120. Bond to each other using a metal fusion method.

After the negative power supply terminal 150 is coupled to the negative electrode 111, the PTC element portion 140 is bent by 180 degrees as illustrated in FIG. 1C to form the first coupling portion 161 of the positive power supply terminal 160. The anode 112 exposed through the second terminal hole 122 of 120 is bonded to each other using a metal welding method such as spot welding or laser.

At this time, as shown in detail in FIG. 2, the first terminal hole 121 and the second terminal hole 122 formed in the sheet 120 are respectively coupled to the first coupling of the negative power terminal 150 and the positive power terminal 160. Terminal holes 121 and 122 are formed in a shape corresponding to the shape of the first coupling parts 151 and 161 to guide the fixed position when the parts 151 and 161 are coupled. That is, the first terminal hole 121 and the second terminal hole 122 serves to guide the front, rear, left, and right positions when the negative power terminal 150 and the positive power terminal 160 are coupled to each other.

In addition, as shown in FIG. 2, the ends 156 are formed at the ends of the support part 155 of the negative electrode power terminal 150 so that the protrusions 157 are formed at both ends of the ends. As shown in FIG. 1C, the PTC element 140 is bent by 180 degrees so that the circuit board 130 can be firmly supported at the correct position. In more detail, the portion in which the end 156 of the support 155 is formed supports the rotated circuit board 130 by bending at 180 degrees, and the left and right protrusions 157 at the end of the support 155 formed by the end 156 are supported. The groove 135 formed in the middle of the circuit board 130 may be inserted to fix the position of the circuit board 130.

As such, the first terminal hole 121, the second terminal hole 122, and the circuit board 130 that guide the first coupling portions 151 and 161 of the negative electrode power terminal 150 and the positive electrode power terminal 160 are disposed. The shape of the supporting negative power terminal 150 serves to accurately control the front, rear, left and right positions when assembling and welding the negative power terminal 150 and the positive power terminal 160 to the circuit board 130. It is a factor to maintain the robustness.

3 illustrates a state in which each separated component of FIG. 1 is assembled to the battery cell 110. Finally, the assembly is completed by shielding one end surface of the battery cell 110 using the upper case 170. .

Hereinafter, a structure in which the upper case 170 is coupled to the battery cell 110 will be described.

First, as shown in FIG. 1, protrusions 125 may be formed on both side surfaces of the sheet 120. In addition, a groove or a hole 172 is formed on a side surface of the upper case 170 as shown in FIG. 3 at a position corresponding to the protrusion 125 of the sheet 120, and the protrusion 125 is formed in the groove or hole 172. The seat 120 and the upper case 170 may be coupled to each other by fitting.

In another embodiment, a groove or a hole 133 may be formed in the bent portion of the extension part 124 vertically extending from the side of the sheet 120 as shown in FIG. 4, and although not shown, Protrusions are formed on the side surface, so that the seat 120 and the upper case 170 are mutually coupled in such a manner that the protrusions of the upper case 170 are fitted into the grooves or holes 133 formed in the sheet 120 from the inside. It may be.

In addition, FIG. 5 is a view illustrating a state in which the positive power source terminal 160 and the upper case 170 are coupled when the upper case 170 is coupled in FIG. 3, as shown in FIG. 5. A locking step 168 may be formed at both sides of a portion bent between the 161 and the support 165. In addition, a protrusion 178 may be formed on an inner surface of the upper case 170 so as to be caught by the locking jaw 168 at a position corresponding to the locking jaw 168. Accordingly, when the upper case 170 covers and fixes the battery cell 110, the protrusion 178 formed on the inner surface of the upper case 170 may be disposed on the latching jaw 168 formed on the bent portion of the positive power supply terminal 160. The upper case 170 is hooked and mutually coupled with the positive power terminal 160.

Similarly, although not shown, the cathode power terminal 150 may be coupled to each other by a protrusion formed on the inner side of the upper case 170 and the locking step 158 formed at the bent portion.

FIG. 6 illustrates one embodiment of a battery pack for a secondary battery when there is no PTC element 140 in FIG. 1. Hereinafter, the description of the battery pack for the secondary battery according to the present embodiment will be described based on the difference from the above-described embodiment.

In this embodiment without the PTC element 140, as shown in FIG. 6, the negative power supply terminal 150 and the positive power supply terminal 160 have symmetrical shapes, and each of the power supply terminals 150 and 160 is illustrated in FIGS. It has the same shape as that of the positive power supply terminal 160 described above with reference to FIG. 5.

Like the above-described embodiment, the negative power terminal 150 and the positive power terminal 160 may be guided to the first terminal hole 121 and the second terminal hole 122 formed in the sheet 120 to be welded at the correct position. Make sure In addition, the protrusion 120 formed in the middle of the side of the sheet 120 is fitted into the groove or hole 172 formed on the side of the upper case 170, the seat 120 and the upper case 170 is mutually coupled can do. As in the above-described embodiment, grooves or holes may be formed in the sheet 120, and protrusions may be formed in the upper case 170 to be coupled to each other. In addition, the locking projections 158 and 168 are formed at the bent portions of the cathode power terminal 150 and the anode power terminal 160 to be coupled to the projection 178 formed on the inner surface of the upper case 170. The configuration is the same as in the above embodiment.

FIG. 7 shows another embodiment when there is no PTC element as shown in FIG. Hereinafter, the differences from the above-described embodiment will be described.

The negative power terminal 150 and the positive power terminal 160 are first coupling parts 151 and 161 and the first coupling portion 151 and 161 coupled to the negative electrode 111 and the positive electrode 112 of the battery cell 110, respectively, as described above. 1 includes support portions 155 and 165 that are vertically bent at the coupling portions 151 and 161 to support the circuit board 130.

In addition, as shown in FIG. 7, the second coupling parts 153 and 163 extending horizontally from the first coupling parts 151 and 161, respectively, to be coupled to the negative terminal 131 and the positive terminal 132 of the circuit board 130. ) May be further included. In addition, a support portion 155 and 165 may include a circuit board 130 coupled to the second coupling portion 153 and 163 at a portion extending between the first coupling portion 151 and 161 and the second coupling portion 153 and 163. It may further include bends (159, 169) that are bent to place on.

In more detail, first, as shown in FIG. 7A, the second coupling part 153 and the positive power of the negative power terminal 150 are respectively connected to the negative terminal 131 and the positive terminal 132 of the circuit board 130. The second coupling part 163 of the terminal 160 is coupled by soldering or the like. The combined assembly is shown in B of FIG. 7, wherein the combined assembly is exposed to the electrodes 111 and 112 of the battery cell 110 exposed through the terminal holes 121 and 122 of the sheet 120. Should be combined as

That is, as shown in FIG. 7B, the first coupling part 151 of the negative power supply terminal 150 and the first coupling part 161 of the positive power supply terminal 160 are respectively formed as the first coupling part of the sheet 120. The negative electrode 111 and the positive electrode 112 exposed through the terminal hole 121 and the second terminal hole 122 may be bonded to each other using a metal welding method such as spot welding or laser.

The assembly including the circuit board 130 is coupled to the battery cell 110 as shown in FIG. 7C, and then the bent portions 159 and 169 of the negative power terminal 150 and the positive power terminal 160 are connected. As shown in FIG. 7D, the circuit board 130 may be seated on the support parts 155 and 165 of the negative power terminal 150 and the positive power terminal 160. As described above with reference to FIG. 2, the ends 156 may be formed at the ends of the support parts 155 and 165 such that the protrusions 157 are formed at both ends of the ends. A portion where the ends 156 of the supporting portions 155 and 165 are formed supports the circuit board 130, and the left and right protrusions 157 of the ends of the supporting portions 155 and 165 formed by the stage 156 are the circuit board 130. The position of the circuit board 130 can be fixed by inserting the groove 135 formed in the middle of the.

After the circuit board 130 is laid on the support parts 155 and 165, the assembly may be completed by covering the upper case 170.

FIG. 8 is a view illustrating a state in which the upper case 170 is coupled to the electrode terminal when the upper case 170 is coupled. Unlike FIG. 8, the support parts 155 and 165 of FIG. The locking protrusion 164 may be formed at both sides. In addition, a groove into which the locking protrusion 164 is inserted may be formed on an inner side surface of the upper case 170 so that the locking protrusion 164 may be inserted and coupled to each other, or the locking protrusion may be formed on the side surface of the upper case 170. A hole 173 into which is inserted may be formed. As shown in FIG. 8, a configuration in which the insertion protrusions 164 are formed on the support parts 155 and 165 and the grooves or holes 173 are formed in the upper case 170 to be coupled to each other is described above with reference to FIGS. 1 to 7. Of course, the embodiment can also be applied.

9 is a perspective view of a battery pack for a secondary battery finally bonded in each of the embodiments of FIGS. 3, 6, and 7, but is not shown, but the battery cell 110 and the adhesive are applied to the inner surface thereof. It may further include a label sheet for wrapping and fixing the outer peripheral surface of the upper case (170).

Those skilled in the art will appreciate that the present invention can be embodied in other specific forms without changing the technical spirit or essential features of the present invention. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is indicated by the scope of the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalent concept are included in the scope of the present invention. Should be interpreted.

1 is an exploded perspective view of components except for the upper case in the battery pack for a secondary battery according to an embodiment of the present invention.

2 is a view showing a state in which the first electrode terminal and the second electrode terminal is coupled to the sheet in the battery pack for a secondary battery according to an embodiment of the present invention.

FIG. 3 is a view illustrating an upper case and a state in which each component separated in FIG. 1 is combined.

4 is a view showing another embodiment of the sheet in FIG.

5 is a view illustrating a state in which an electrode terminal is coupled to the upper case in FIG. 3.

FIG. 6 illustrates one embodiment when there is no PTC element in FIG. 1.

FIG. 7 illustrates another embodiment when there is no PTC element in FIG. 1.

FIG. 8 is a view illustrating a state in which an electrode terminal is coupled to the upper case in FIG. 7.

9 is a perspective view of a battery pack for a secondary battery finally combined in each of the embodiments of FIGS. 3, 6, and 7.

<Explanation of symbols for the main parts of the drawings>

110: battery cell 120: sheet

130: circuit board 140: PTC element

150: negative power terminal 160: positive power terminal

170: upper case

Claims (9)

A battery cell having a first electrode and a second electrode at one end thereof; A plate-like sheet having a first terminal hole and a second terminal hole formed therein so as to conduct electricity with the first electrode and the second electrode, and fixed to one end surface of the battery cell; A first power supply terminal and a second power supply terminal which are coupled to and energize the first electrode and the second electrode through the first terminal hole and the second terminal hole, respectively; A circuit board electrically coupled with the first power terminal and the second power terminal; And An upper case accommodating the circuit board and covering one end of the battery cell; The first power supply terminal and the second power supply terminal are respectively bent and extended vertically from the first coupling portion and the first coupling portion that are coupled to the first electrode and the second electrode, and support the circuit board spaced apart from the sheet. Including a support to The upper case is inserted into a hole passing through a groove or side surface formed in the inner surface of the upper case projections formed on the side of the upper sheet is fitted into the seat, bending of the first power terminal and the second power terminal The projections formed on the inner side of the upper case is coupled to the locking jaw formed on both sides of the portion to be coupled, The first and second terminal holes are formed to correspond to the shape of the first coupling portion to guide the position where the first coupling portion of the first power supply terminal and the second power supply terminal is a secondary battery battery pack. A battery cell having a first electrode and a second electrode at one end thereof; A plate-like sheet having a first terminal hole and a second terminal hole formed therein so as to conduct electricity with the first electrode and the second electrode, and fixed to one end surface of the battery cell; A first power supply terminal and a second power supply terminal which are coupled to and energize the first electrode and the second electrode through the first terminal hole and the second terminal hole, respectively; A circuit board electrically coupled with the first power terminal and the second power terminal; And An upper case accommodating the circuit board and covering one end of the battery cell; The first power supply terminal and the second power supply terminal are respectively bent and extended vertically from the first coupling portion and the first coupling portion that are coupled to the first electrode and the second electrode, and support the circuit board spaced apart from the sheet. Including a support to The upper case is a groove or a hole formed in the bent portion of the extension portion bent vertically extending from the side of the sheet is inserted into the projection formed on the side of the upper case is fitted to the sheet, the first power terminal and the Battery pack for a secondary battery is coupled to the engaging projection formed on the inner side of the upper case to the engaging jaw formed on both sides of the bent portion of the second power terminal. A battery cell having a first electrode and a second electrode at one end thereof; A plate-like sheet having a first terminal hole and a second terminal hole formed therein so as to conduct electricity with the first electrode and the second electrode, and fixed to one end surface of the battery cell; A first power supply terminal and a second power supply terminal which are coupled to and energize the first electrode and the second electrode through the first terminal hole and the second terminal hole, respectively; A circuit board electrically coupled with the first power terminal and the second power terminal; And An upper case accommodating the circuit board and covering one end of the battery cell; The first power supply terminal and the second power supply terminal are respectively bent and extended vertically from the first coupling portion and the first coupling portion that are coupled to the first electrode and the second electrode, and support the circuit board spaced apart from the sheet. Including a support to The upper case is inserted into a hole passing through a groove or side surface formed in the inner surface of the upper case projections formed on the side of the upper sheet is fitted into the seat, the support portion of the first power terminal and the second power terminal The engaging protrusions formed at both sides of the upper case are inserted into and coupled to a hole passing through the groove or side formed in the inner side of the upper case, The first and second terminal holes are formed to correspond to the shape of the first coupling portion to guide the position where the first coupling portion of the first power supply terminal and the second power supply terminal is a secondary battery battery pack. A battery cell having a first electrode and a second electrode at one end thereof; A plate-like sheet having a first terminal hole and a second terminal hole formed therein so as to conduct electricity with the first electrode and the second electrode, and fixed to one end surface of the battery cell; A first power supply terminal and a second power supply terminal which are coupled to and energize the first electrode and the second electrode through the first terminal hole and the second terminal hole, respectively; A circuit board electrically coupled with the first power terminal and the second power terminal; And An upper case accommodating the circuit board and covering one end of the battery cell; The first power supply terminal and the second power supply terminal are respectively bent and extended vertically from the first coupling portion and the first coupling portion that are coupled to the first electrode and the second electrode, and support the circuit board spaced apart from the sheet. Including a support to The upper case is a groove or a hole formed in the bent portion of the extension portion bent vertically extending from the side of the sheet is inserted into the projection formed on the side of the upper case is fitted to the sheet, the first power terminal and the A battery pack for a secondary battery, wherein the engaging protrusions formed on both sides of the support of the second power terminal are inserted into and coupled to a hole penetrating through a groove or a side surface formed in an inner surface of the upper case. The method according to claim 1 or 4, A double-sided tape is attached between the sheet and the battery cell so that the sheet is fixed to one end surface of the battery cell. The method according to claim 1 or 4, Further comprising a bar type PTC element extending to the circuit board and connected to the first power terminal, An end of the PTC element which is connected to one end of the circuit board in the longitudinal direction and extends in a straight line is connected to the first coupling part of the first power terminal. The first coupling portion of the first power terminal is coupled to the first electrode, and the second power terminal coupled to the other end of the circuit board by bending the PTC element is fixed to the second electrode, Ends are formed at ends of the support of the first power terminal so that protrusions are formed at both ends of the end, the ends support the circuit board, and protrusions formed at both ends of the end are inserted into grooves formed in the circuit board. Battery pack for a secondary battery to fix the position of the circuit board. The method according to claim 1 or 4, The first electrode and the second electrode are each A second coupling part extending from a first coupling part to be coupled to the circuit board; And Further comprising a bent portion bent in the extending portion between the first coupling portion and the second coupling portion, Bend the bent portions of the first electrode and the second electrode in a state in which the second coupling portion of the first electrode and the second electrode are coupled to the circuit board, respectively, so that the circuit board can be placed on the support and supported. , Ends are formed at the ends of the support so that protrusions are formed at both ends of the ends. The ends support the circuit board, and protrusions formed at both ends of the end are inserted into grooves formed in the circuit board. Battery pack for secondary batteries to fix the position of. The method of claim 4, wherein The first and second terminal holes are formed to correspond to the shape of the first coupling portion to guide the position where the first coupling portion of the first power supply terminal and the second power supply terminal is a secondary battery battery pack. The method according to claim 1 or 4, The battery pack for a secondary battery further comprises a label sheet surrounding the outer peripheral surface of the battery cell and the upper case.

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