Battery pack

Abstract

To provide a battery pack.SOLUTION: A battery pack includes: a battery cell; a porch, covering the battery cell, which includes a terrace formed in a first direction for leading out an electrode of the battery cell; a substrate, disposed on a first surface, which includes a protection element that controls charging and discharging of the battery cell, and in which a second surface opposite to the first surface is disposed so as to face a module mounting surface of the terrace; a molding part which covers, on the first surface, the protection element; and a support part which is interposed between the molding part and the substrate so as to support the substrate.SELECTED DRAWING: Figure 5A

Description

Technical Field

[0001] The present invention relates to a battery pack.

Background Art

[0002] A secondary battery is a battery that can be charged and discharged multiple times so as to be reusable. Secondary batteries are used as energy sources for mobile devices, electric vehicles, hybrid vehicles, electric bicycles, uninterruptible power supplies, etc., and depending on the type of external device to which they are applied, they are used in the form of a single battery or in a module form in which a large number of batteries are connected and grouped into one unit (see Patent Document 1, etc.).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The problem to be solved by the present invention is to provide a battery pack including a support portion capable of preventing damage to a substrate.

[0005] Another problem to be solved by the present invention is to provide a battery pack including a support portion disposed apart from a protection element on one surface of a substrate.

Means for Solving the Problems

[0006] The battery pack for solving the above problem includes a battery cell, a pouch including a terrace formed in a first direction in which an electrode of the battery cell is drawn out and covering the battery cell, a substrate disposed on a first surface and including a protection element for controlling charging and discharging of the battery cell, wherein a second surface opposite to the first surface is disposed to face a module mounting surface of the terrace, a molding portion covering the protection element on the first surface, and a support portion interposed between the molding portion and the substrate and configured to support the substrate.

[0007] The substrate, the molding portion, and the support portion can form a protection circuit module.

[0008] The module mounting surface may be disposed in a second direction intersecting the first direction on the pouch.

[0009] The substrate may extend in a third direction intersecting the first direction and the second direction respectively.

[0010] The support portion may extend in the third direction.

[0011] There may be a plurality of the support portions.

[0012] The plurality of support portions may be spaced apart from each other in a first direction on the first surface of the substrate.

[0013] The support portion may be disposed on the first surface of the substrate so as not to contact the protection element.

[0014] The support portion may include a through-hole structure so as to avoid an area where the protection element is disposed.

[0015] The support portion may include a metal material.

[0016] The terrace, the substrate, and the molding part may be arranged to overlap in the second direction.

[0017] The terrace, the substrate, and the molding part may be arranged in order in the second direction.

[0018] The molding part may include a heat-conductive material configured to discharge the heat released by the substrate to the outside of the protection circuit module.

[0019] The substrate may be disposed on the second surface and include a connection tab that is electrically connected to the electrode of the battery cell.

Advantages of the Invention

[0020] The battery pack according to the present invention can prevent damage to the substrate through a support part that supports the substrate.

[0021] The battery pack according to the present invention can provide a protection circuit module that can efficiently protect the substrate through a support part that is arranged to avoid the protection element on the substrate.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5A

Figure 5B

Figure 5C

Figure 6

Figure 7

Figure 8

Figure 9

[0023] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to that, terms and words used in this specification and the claims should not be construed as being ordinary or limited to dictionary meanings. The inventor must interpret them as meanings and concepts that conform to the technical idea of the present invention in accordance with the principle that the concept of the terms can be appropriately defined in order to explain the invention in the best way. Therefore, the embodiments described in this specification and the configurations shown in the drawings are only some of the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. It should be understood that at the time of this application, there may be various equivalents and modifications that can replace them. Also, as used in this specification, "comprise" and / or "including" identify the presence of the recited shape, number, step, operation, member, element, and / or group thereof, and do not exclude the presence or addition of one or more other shapes, numbers, operations, members, elements, and / or groups. Also, when describing embodiments of the present invention, "capable of" and "is also" include "one or more embodiments of the present invention".

[0024] In addition, for the purpose of facilitating understanding of the invention, the accompanying drawings are not shown at actual scale, and the dimensions of some components may be exaggerated. Also, in different embodiments, the same reference numerals are assigned to the same components.

[0025] The mention that two comparison objects are "identical" means "substantially identical". Therefore, "substantially identical" may include cases having a deviation regarded as a low level in the art, for example, a deviation within 5%. Also, in a predetermined region, the fact that a certain parameter is uniform means that it is uniform from an average perspective.

[0026] Even if terms such as first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are only used to distinguish one component from another, and it goes without saying that the first component is also the second component unless there is a contrary description.

[0027] Throughout the specification, unless there is a contrary description, each component may be singular or plural.

[0028] The statement that any configuration is arranged "above (or below)" a component or "on (or under)" a component means not only that any configuration is arranged in contact with the upper surface (or lower surface) of the component, but also that there may be other configurations intervening between the component and any configuration arranged "on (or under)" the component.

[0029] Also, when a certain component is described as being "connected", "coupled", or "joined" to another component, it should be understood that the components may be directly connected or joined to each other, or there may be other components "interposed" between the components, or each component may be "connected", "coupled", or "joined" through other components. Also, when a certain part is electrically coupled to another part, this includes not only the case where they are directly connected, but also the case where other elements are interposed therebetween and they are connected.

[0030] Throughout the specification, when it is stated as "A and / or B", this means A, B, or A and B, unless otherwise stated to the contrary. That is, "and / or" includes all combinations or any combination of the plurality of listed items. When it is stated as "C to D", this means C or more and D or less, unless otherwise stated to the contrary.

[0031] Hereinafter, with reference to the accompanying drawings, a battery pack according to an exemplary embodiment will be described.

[0032] FIG. 1 is a perspective view of a battery pack 1 according to an exemplary embodiment. FIG. 2 is an assembly view of the battery pack 1 according to an exemplary embodiment.

[0033] Referring to FIGS. 1 and 2, a battery pack 1 according to an exemplary embodiment includes a battery cell 20. The battery cell 20 includes a negative electrode plate, a positive electrode plate, and a separator interposed therebetween. The negative electrode plate is provided with a negative electrode tab electrically connected to the negative electrode non-coated portion, and the positive electrode plate is provided with a positive electrode tab electrically connected to the positive electrode non-coated portion. The negative electrode tab is also the first electrode 21. The positive electrode tab is also the second electrode 22. The battery cell 20 is an electrode assembly including the first electrode 21 and the second electrode 22, but is not limited thereto.

[0034] The battery pack 1 according to an exemplary embodiment includes a pouch 30 configured to accommodate the battery cell 20. The pouch 30 can accommodate the battery cell 20. The battery cell 20 can be accommodated inside the pouch 30. The pouch 30 can cover the battery cell 20. The pouch 30 can expose at least a part of the first electrode 21 and the second electrode 22. At least a part of the first electrode 21 and the second electrode 22 can be exposed outside the pouch 30. The first electrode 21 and the second electrode 22 exposed outside the pouch 30 are electrically connected to a protection circuit module 40 described later with reference to FIG. 6 and below.

[0035] FIG. 3 is a drawing for explaining a terrace 31 of the pouch 30 according to an exemplary embodiment. FIG. 3 is a drawing showing that each corner of the pouch 30 shown in FIG. 2 is sealed.

[0036] Referring to FIGS. 2 and 3, the first electrode 21 and the second electrode 22 of the battery cell 20 according to an exemplary embodiment are drawn out in a first direction z. The first direction z is the upward direction of the pouch 30. The first electrode 21 and the second electrode 22 of the battery cell 20 are drawn out in the upward direction of the pouch 30.

[0037] The pouch 30 according to an exemplary embodiment includes a terrace 31 formed at the top. The pouch 30 includes a terrace 31 formed in a first direction z in which the first electrode 21 and the second electrode 22 of the battery cell 20 are drawn out. The terrace 31 is a portion where the protection circuit module 40 described later with reference to FIG. 6 and below is disposed.

[0038] The terrace 31 according to an exemplary embodiment includes a module mounting surface 311 formed in the front direction of the porch 30. The module mounting surface 311 is also one surface of the terrace 31 formed in the front direction of the porch 30. The module mounting surface 311 is also one surface of the terrace 31 formed in the x-axis direction. The module mounting surface 311 is a portion where the protection circuit module 40 to be described below in FIG. 6 and later is arranged. However, the above description regarding the arrangement and function of the terrace 31 and the module mounting surface 311 is merely an example and is not limited thereto.

[0039] FIG. 4 is a drawing for explaining a connection tab 53 arranged on a substrate 50 according to an exemplary embodiment. FIG. 5A is a drawing for explaining a support portion 60 arranged on a substrate 50 according to an exemplary embodiment.

[0040] Referring to FIGS. 3 to 5A, the battery pack 1 according to an exemplary embodiment includes a substrate 50 configured to be arranged on the module mounting surface 311 of the terrace 31. The substrate 50 includes a first surface 51 and a second surface 52 opposite to the first surface 51. The substrate 50 is arranged on the first surface 51 and includes a protection element 500 that controls charging and discharging of the battery cell 20. The protection element 500 can control charging and discharging of the battery cell 20. The protection element 500 is electrically connected to the battery cell 20. The protection element 500 can selectively cut off or allow the power supplied to the battery cell 20. The protection element 500 can prevent excessive power supply to the battery cell 20. The protection element 500 can prevent the function of the battery cell 20 from deteriorating due to excessive power supply to the battery cell 20. However, the arrangement and function of the protection element 500 are not limited to the above description.

[0041] The substrate 50 according to an exemplary embodiment includes a connection tab 53 that is electrically connected to the first terminal and the second terminal of the battery cell 20. The connection tab 53 can be disposed on the second surface 52 of the substrate 50. The connection tab 53 can be disposed on the other surface of the substrate 50 that is opposite to the surface on which the protection element 500 is disposed. However, the arrangement of the connection tab 53 is not limited to the above description.

[0042] On the other hand, for the purpose of weight reduction and size reduction of the battery pack 1, the thickness of the substrate 50 is configured not to be thick. When the thickness of the substrate 50 is configured not to be thick, the battery pack 1 is configured not to be heavy. When the thickness of the substrate 50 is configured not to be thick, the size of the battery pack 1 is configured not to be large. The thickness of the substrate 50 is the thickness of the substrate 50 measured in the second direction x. The second direction x is a direction that intersects the first direction z from which the electrodes of the battery cell 20 are drawn out. The second direction x is also a direction perpendicular to the first direction z. The second direction x is also a direction that vertically crosses the first surface 51 and the second surface 52 of the substrate 50. The thickness of the substrate 50 is the distance between the first surface 51 and the second surface 52 of the substrate 50. The thickness of the substrate 50 is also the distance between the surface on which the protection element 500 is disposed and the other surface on which the connection tab 53 is disposed among the surfaces on the substrate 50. However, the above description regarding the thickness of the substrate 50 is merely an example and is not limited thereto.

[0043] The substrate 50 according to an exemplary embodiment extends in a third direction y. The third direction y is a direction intersecting the first direction z from which the electrodes of the battery cell 20 are drawn out. The third direction y is also a direction perpendicular to the first direction z. The third direction y is also a direction intersecting the second direction x that perpendicularly traverses the first surface 51 and the second surface 52 of the substrate 50 of the battery cell 20. The third direction y is also a direction perpendicular to the second direction x. The third direction y is also a direction intersecting the first direction z and the second direction x respectively. The third direction y is also a direction perpendicular to the first direction z and the second direction x respectively. The fact that the substrate 50 extends in the third direction y means that the size of the substrate 50 measured in the third direction y is larger than the sizes of the substrate 50 measured in the second direction x and the first direction z. More specifically, the size of the substrate 50 in the third direction y is not less than 3 times and not more than 30 times the size of the substrate 50 in the first direction z. The size of the substrate 50 in the third direction y is not less than 5 times and not more than 10 times the size of the substrate 50 in the second direction x. The size of the substrate 50 in the third direction y is not less than 10 times and not more than 200 times the thickness of the substrate 50 in the second direction x. The size of the substrate 50 in the third direction y is not less than 20 times and not more than 100 times the thickness of the substrate 50 in the second direction x. However, the above description regarding the form of the substrate 50 is merely an example and is not limited thereto.

[0044] When the substrate 50 according to an exemplary embodiment extends in the third direction y, damage to the substrate 50 due to external force must be prevented. When the substrate 50 extends in the third direction y, excessive torque acting on the substrate 50 must be prevented. When the substrate 50 extends in the third direction y, excessive shear stress acting on the substrate 50 must be prevented. The forces acting on the substrate 50 are diverse in addition to the aforementioned forces. For example, a force due to the self-weight of the substrate 50 may act. A force may act on the substrate 50. Hereinafter, a support portion 60 configured to prevent damage to the substrate 50 will be described.

[0045] The battery pack 1 according to an exemplary embodiment includes a support portion 60. The battery pack 1 includes a support portion 60 configured to support a substrate 50. The support portion 60 is configured to reinforce the strength of the substrate 50. The support portion 60 can prevent excessive torque from acting on the substrate 50. The support portion 60 can prevent excessive shear stress from acting on the substrate 50. The support portion 60 can prevent deformation of the substrate 50 due to an external force. The support portion 60 can prevent breakage of the substrate 50. However, the function of the support portion 60 is not limited to the above description.

[0046] The support portion 60 according to an exemplary embodiment extends in the direction in which the substrate 50 extends. The support portion 60 extends in a third direction y. The support portion 60 and the substrate 50 each extend in the third direction y. Both longitudinal ends of the support portion 60 can be arranged toward both longitudinal ends of the substrate 50, respectively. The directions in which the support portion 60 and the substrate 50 extend are aligned. When the directions in which the support portion 60 and the substrate 50 extend are aligned, excessive force acting on the substrate 50 can be prevented. When the directions in which the support portion 60 and the substrate 50 extend are aligned, breakage of the substrate 50 can be prevented. However, the fact that the directions in which the support portion 60 and the substrate 50 extend are aligned does not mean that the support portion 60 and the substrate 50 extend in parallel directions. For example, the support portion 60 extending in alignment with the direction in which the substrate 50 extends may also include the case where the angles of the extending directions of the support portion 60 and the substrate 50 are within a predetermined angle range.

[0047] The support portion 60 according to an exemplary embodiment is disposed on a first surface 51 of the substrate 50. The support portion 60 can support the substrate 50 on the first surface 51 of the substrate 50. The support portion 60 can support the substrate 50 on the first surface 51 of the substrate 50. However, the arrangement of the support portion 60 is not limited to the above description. For example, the support portion 60 can be disposed on the first surface 51 and the second surface 52 of the substrate 50, respectively.

[0048] The support portion 60 according to an exemplary embodiment is made of a rigid material. The support portion 60 may include a metallic material. The support portion 60 may also be made of a heat-conductive material. When the support portion 60 includes a metallic material, the support portion 60 can stably support the substrate 50. When the support portion 60 is made of a heat-conductive material, the support portion 60 can effectively discharge the heat released by the substrate 50 to the outside of the battery pack 1. However, the material of the support portion 60 is not limited to the above description.

[0049] On the first surface 51 of the substrate 50 according to an exemplary embodiment, a protection element 500 and a support portion 60 are arranged. The support portion 60 may be arranged at a predetermined interval from the protection element 500 on the first surface 51 of the substrate 50. The support portion 60 may be arranged so as not to contact the protection element 500 on the first surface 51 of the substrate 50. The fact that the support portion 60 is arranged so as not to contact the protection element 500 means that it is not electrically connected to the protection element 500. When the support portion 60 is arranged at a distance from the protection element 500, it is not electrically connected to the protection element 500. However, the arrangement of the support portion 60 and the protection element 500 is not limited to the above description. Also, the support portion 60 may be arranged at a distance so as not to be electrically connected to an electrical configuration (not shown) arranged on the substrate 50 other than the protection element 500.

[0050] FIG. 5B is a drawing for explaining the support portion 60 arranged on the substrate 50 according to an exemplary embodiment. Hereinafter, duplicate descriptions will be omitted, and the differences will be mainly described.

[0051] Referring to FIGS. 3 to 5B, there may be a plurality of support portions 60 according to an exemplary embodiment. The plurality of support portions 60 are each disposed on the first surface 51 of the substrate 50. The plurality of support portions 60 are disposed on the same plane as the protection element 500 disposed on the substrate 50. The plurality of support portions 60 are disposed so as to avoid the protection element 500 disposed on the substrate 50. The plurality of support portions 60 are disposed separately from the protection element 500 on the substrate 50. The plurality of support portions 60 are spaced apart from each other in the first direction z on the first surface 51 of the substrate 50. When the plurality of support portions 60 are spaced apart from each other in the first direction z on the first surface 51 of the substrate 50, they are disposed so as to avoid the protection element 500. When the plurality of support portions 60 are spaced apart from each other in the first direction z on the first surface 51 of the substrate 50, they are not electrically connected to the protection element 500. When the plurality of support portions 60 are spaced apart from each other in the first direction z on the first surface 51 of the substrate 50, the substrate 50 can be stably supported in a region where it is not electrically connected to the protection element 500. However, the arrangement of the plurality of support portions 60 is not limited to the above description. For example, the plurality of support portions 60 may be spaced apart from each other in the second direction x on the first surface 51 of the substrate 50. As long as it is an arrangement that is not connected to the protection element 500 on the substrate 50 and can support the substrate 50, the arrangement of the plurality of support portions 60 disposed on the substrate 50 is diverse.

[0052] FIG. 5C is a drawing for explaining the support portion 60 disposed on the substrate 50 according to an exemplary embodiment.

[0053] Referring to FIGS. 3 to 5C, the support portion 60 according to the exemplary embodiment may include a through-hole structure 61. The support portion 60 includes the through-hole structure 61 so as to avoid the region where the protection element 500 is disposed. The through-hole structure 61 can define the region where the protection element 500 is disposed. The through-hole structure 61 is configured to cover the protection element 500. The through-hole structure 61 can provide a space in which the protection element 500 can be disposed separately so that the support portion 60 is not electrically connected to the protection element 500. The protection element 500 may be disposed within the through-hole structure 61 of the support portion 60. Within the through-hole structure 61 of the support portion 60, the protection element 500 does not contact the support portion 60. The support portion 60 can efficiently support the substrate 50 without contacting the protection element 500 through the through-hole structure 61. The through-hole structure 61 is also a structure that penetrates in the thickness direction of the substrate 50 on the surface of the support portion 60. The through-hole structure 61 is also a structure that penetrates in the second direction x on the surface of the support portion 60. The through-hole structure 61 of the support portion 60 shown in FIG. 5C is shown as circular, but the shape of the through-hole structure 61 is not limited thereto. The through-hole structure 61 of the support portion 60 can have various shapes including polygons as long as it is a shape that is not connected to the protection element 500 on the substrate 50 and can support the substrate 50.

[0054] FIG. 6 is a combined view of the molding portion 70 and the substrate 50 according to the exemplary embodiment. FIG. 7 is a drawing for explaining the molding portion 70 formed on the substrate 50 according to the exemplary embodiment.

[0055] Referring to FIGS. 4 to 7, the battery pack 1 according to the exemplary embodiment includes a molding portion 70. The molding portion 70 is disposed on the first surface 51 of the substrate 50. The molding portion 70 can cover the protection element 500 on the substrate 50. The molding portion 70 can cover at least a part of the support portion 60 on the substrate 50. The molding portion 70 can be disposed on the same surface as the surface on which the protection element 500 is disposed on the substrate 50. The molding portion 70 can be disposed on the same surface as the surface on which the support portion 60 is disposed on the substrate 50.

[0056] The molding part 70 according to the exemplary embodiment extends in the direction in which the substrate 50 extends. The molding part 70 includes a solid material. The material of the molding part 70 may include resin. The material of the molding part 70 may include metal. The molding part 70 can prevent the substrate 50 from deforming due to an external force. However, the material and function of the molding part 70 are not limited to the above description.

[0057] Referring again to FIGS. 1, 4 to 7, the battery pack 1 according to the exemplary embodiment includes a flexible circuit board 80 electrically connected to one end of the substrate 50. The flexible circuit board 80 is electrically connected to one end of the substrate 50. A connector 81 for energizing with an external device is formed on the flexible circuit board 80. The connector 81 can electrically connect the external device and the battery cell 20. The flexible circuit board 80 is configured to be flexible so that the user can adjust the position of the connector 81. The fact that the flexible circuit board 80 is configured to be flexible means that it is configured to be able to adjust the relative positions of the connector 81 and the substrate 50.

[0058] On the other hand, the substrate 50, the molding part 70, and the support part 60 according to the exemplary embodiment can form a protection circuit module 40. The protection circuit module 40 includes the substrate 50, the molding part 70, and the support part 60. Hereinafter, the structure in which the protection circuit module 40 is disposed on the terrace 31 of the pouch 30 will be described.

[0059] FIG. 8 is a drawing for explaining the structure in which the protection circuit module 40 according to the exemplary embodiment is connected to the first electrode 21 and the second electrode 22 of the battery cell 20. FIG. 9 is a drawing for explaining the structure in which the protection circuit module 40 according to the exemplary embodiment is disposed on the terrace 31 of the pouch 30.

[0060] Referring to FIGS. 4 to 9, the connection tab 53 disposed on the substrate 50 according to the exemplary embodiment is electrically connected to the first terminal and the second terminal of the battery cell 20. The connection tab 53 being connected to the first terminal and the second terminal of the battery cell 20 means that the battery cell 20 is electrically connected to the substrate 50. The connection tab 53 being connected to the first terminal and the second terminal of the battery cell 20 means that the battery cell 20 is electrically connected to the protection circuit module 40.

[0061] The protection circuit module 40 according to the exemplary embodiment is disposed on the terrace 31 of the pouch 30 through rotation after the connection tab 53 is connected to the first terminal and the second terminal of the battery cell 20. The protection circuit module 40 rotates about the third direction y and is disposed on the terrace 31 of the pouch 30. The protection circuit module 40 rotating means that the second surface 52 of the substrate 50 is disposed in a direction from facing the front surface of the pouch 30 to facing the rear surface of the pouch 30. The protection circuit module 40 rotating means that the second surface 52 of the substrate 50 is disposed in a direction from facing the second direction x to the direction opposite to the second direction x. The protection circuit module 40 rotating means that the first surface 51 of the substrate 50 is disposed in a direction from facing the rear surface of the pouch 30 to facing the front surface of the pouch 30. The protection circuit module 40 rotating means that the first surface 51 of the substrate 50 is disposed in a direction from the direction opposite to the second direction x to the second direction x.

[0062] Referring again to FIGS. 6, 7, and 9, at least a part of the second surface 52 of the substrate 50 according to the exemplary embodiment is disposed opposite to the module mounting surface 311 of the terrace 31. The module mounting surface 311 of the terrace 31 is also one surface of the terrace 31 formed in a direction facing the front surface of the pouch 30. The module mounting surface 311 of the terrace 31 is disposed in the second direction x. The module mounting surface 311 of the terrace 31 is also one surface of the terrace 31 formed in the second direction x.

[0063] In the protection circuit module 40 according to the exemplary embodiment, the second surface 52 of the substrate 50 is fixed facing the module mounting surface 311 of the terrace 31. By fixing the second surface 52 of the substrate 50 facing the module mounting surface 311 of the terrace 31, the protection circuit module 40 and the module mounting surface 311 are arranged to overlap in the second direction x.

[0064] The terrace 31, the substrate 50, and the molding part 70 according to the exemplary embodiment are arranged to overlap in the second direction x. The terrace 31, the substrate 50, and the molding part 70 are arranged in order in the second direction x. The heat released by the substrate 50 is discharged in the second direction x. The heat released by the substrate 50 is discharged in the second direction x through the molding part 70. The molding part 70 includes a material with high thermal conductivity. The molding part 70 may include a heat conductive material configured to discharge the heat released by the substrate 50 to the outside of the protection circuit module 40. The molding part 70 can discharge the heat released by the substrate 50 to the outside of the battery pack 1.

[0065] The substrate 50, the support part 60, and the molding part 70 according to the exemplary embodiment are arranged to overlap in the second direction x. The substrate 50, the support part 60, and the molding part 70 are arranged in order in the second direction x. The support part 60 is interposed between the substrate 50 and the molding part 70. The support part 60 can be arranged on the same surface as the surface on which the protection element 500 is arranged on the substrate 50. The support part 60 can be arranged adjacent to the protection element 500 on the first surface 51 of the substrate 50. The support part 60 includes a material with high thermal conductivity. The support part 60 may include a heat conductive material configured to discharge the heat released by the substrate 50 to the outside of the protection circuit module 40. The support part 60 can transfer the heat released by the substrate 50 to the molding part 70. The support part 60 can guide the heat released by the substrate 50 to be discharged to the outside of the protection circuit module 40. When the substrate 50, the support part 60, and the molding part 70 are arranged to overlap in the second direction x, the support part 60 can transfer the heat released by the substrate 50 to the molding part 70 well.

[0066] The present invention has been described with reference to the embodiments shown in the accompanying drawings, which are merely exemplary, and those having ordinary knowledge in the technical field to which the present invention pertains will be able to understand that various modifications and equivalent other embodiments are possible hereinafter.

Explanation of Reference Numerals

[0067] 1 Battery pack 20 Battery cell 30 Pouch 31 Terrace 311 Module mounting surface 40 Protection circuit module 50 Substrate 500 Protection element 51 First surface 52 Second surface 53 Connection tab 60 Support portion 61 Through-hole structure 70 Molding portion 80 Flexible printed circuit board 81 Connector

Claims

1. A battery cell, a pouch including a terrace that covers the battery cell and is formed in a first direction in which an electrode of the battery cell is drawn out, a substrate disposed on a first surface, including a protection element that controls charging and discharging of the battery cell, and having a second surface opposite to the first surface disposed to face a module mounting surface of the terrace, a molding portion that covers the protection element on the first surface, and a support portion interposed between the molding portion and the substrate and configured to support the substrate, the battery pack comprising the same.

2. The battery pack according to claim 1, wherein the substrate, the molding portion, and the support portion form a protection circuit module.

3. The battery pack according to claim 2, wherein the module mounting surface is disposed in a second direction intersecting the first direction on the pouch.

4. The battery pack according to claim 3, wherein the substrate extends in a third direction intersecting the first direction and the second direction, respectively.

5. The battery pack according to claim 4, wherein the support portion extends in the third direction.

6. The battery pack according to claim 5, wherein there are a plurality of the support portions.

7. The battery pack according to claim 6, wherein the plurality of support portions are spaced apart from each other in a first direction on the first surface of the substrate.

8. The battery pack according to claim 5, wherein the support portion is disposed on the first surface of the substrate so as not to contact the protection element.

9. The battery pack according to claim 8, wherein the support portion includes a through-hole structure so as to avoid an area where the protection element is disposed.

10. The battery pack according to claim 9, wherein the support portion includes a metal material.

11. The battery pack according to claim 5, wherein the terrace, the substrate, and the molding portion are disposed to overlap in the second direction.

12. The battery pack according to claim 11, wherein the terrace, the substrate, and the molding portion are sequentially disposed in the second direction.

13. The battery pack according to claim 12, wherein the molding portion includes a heat-conductive material configured to discharge heat emitted from the substrate to the outside of the protection circuit module.

14. The substrate, The battery pack according to claim 1, comprising a connection tab disposed on the second surface and electrically connected to the electrode of the battery cell.

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