Battery pack

Abstract

The present disclosure relates to providing a battery pack having improved mechanical strength. Therefore, the utility model provides a battery pack. The battery pack includes a battery cell, a platform extending from the battery cell, a protection circuit module (PCM) disposed to face the platform, a first connection tab extending from the platform and electrically connected to the battery cell, and a second connection tab disposed between the PCM and the first connection tab and configured to electrically connect the PCM to the battery cell. According to the present disclosure, since the bridge that bends and deforms in the process of connecting the battery cell and the PCM ensures sufficient rigidity, stable power supply can be maintained even when an external impact is repeatedly applied.

Description

Technical Field

[0001] Aspects of embodiments of the present disclosure relate to a battery pack. Background Art

[0002] Generally, as the demand for portable electronic products such as laptop computers, video cameras, and mobile phones has rapidly increased, and the commercialization of robots, electric vehicles, etc. has officially begun, battery packs capable of repeated charging and discharging are being actively studied.

[0003] The battery pack may be configured to include battery cells for supplying power and a protection circuit module (PCM) electrically connected to the battery cells to continuously detect and control values such as voltage, current, and temperature. The battery pack requires a connection structure with sufficient reliability against external shocks to be designed between the battery cells and the PCM.

[0004] The above information disclosed in the technology forming the background of the present disclosure is only for enhancing the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art. Summary of the Utility Model

[0005] One aspect of embodiments of the present disclosure relates to a battery pack having high reliability and improved mechanical strength.

[0006] These and other aspects and features of the present disclosure will be set forth in the following description of some embodiments of the present disclosure or will become apparent from the following description of some embodiments of the present disclosure.

[0007] According to one aspect of the present disclosure, the battery pack includes: battery cells; a platform extending from the battery cells; a protection circuit module (PCM) disposed to face the platform; a first connection tab extending from the platform and electrically connected to the battery cells; and a second connection tab disposed between the PCM and the first connection tab and configured to electrically connect the PCM to the battery cells.

[0008] The second connection tab may include: a first tab body connected to the first connection tab; a second tab body disposed spaced apart from the first tab body and connected to the PCM; and a support member disposed between the first tab body and the second tab body and configured to support the first tab body and the second tab body to be rotatable relative to each other.

[0009] The support member may include: a plurality of bridging members configured to bend and deform as the angle between the first tab body and the second tab body changes and disposed spaced apart from each other in a first direction; and notches configured to penetrate the second connection tab in a second direction perpendicular to the first direction.

[0010] The notch can be provided between a pair of adjacent bridging members.

[0011] The bridging members can be formed as a pair, and the width of the bridging members parallel to the first direction can be greater than 1 mm and less than or equal to 1.6 mm.

[0012] The pair of bridging members can be respectively provided at both ends of the second connection tab.

[0013] The thickness of the bridging members parallel to the second direction can be greater than or equal to 0.1 mm and less than or equal to 0.127 mm.

[0014] The first connection tab can extend in a direction away from the platform, and one end of the first connection tab can be bent in a direction approaching the platform.

[0015] The first connection tab can be elastically deformable.

[0016] The battery pack can further include a fixing strap provided between the platform and the PCM and configured to fix the PCM to the platform.

[0017] The PCM can include: a first surface provided to face the fixing strap and having an electronic device mounted thereon; and a second surface provided on the opposite side of the first surface, and the second connection tab can be provided on the first surface.

[0018] The fixing strap can include: an adhesive area provided to face the PCM and to which the electronic device adheres; and a separation area provided to face the second connection tab and configured to be separated from the second connection tab.

[0019] The area of the separation area can be greater than the area of the second connection tab provided to face the fixing strap. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings of the present specification illustrate some embodiments of the present disclosure and further describe aspects and features of the present disclosure together with the detailed description of the present disclosure. However, the present disclosure should not be construed as being limited to the drawings.

[0021] Figure 1 is a perspective view schematically showing the structure of a battery pack according to an embodiment of the present disclosure.

[0022] Figure 2 is an exploded perspective view schematically showing the structure of a battery pack according to an embodiment of the present disclosure.

[0023] Figure 3 is a cross-sectional view schematically showing the structure of a battery pack according to an embodiment of the present disclosure.

[0024] Figure 4 is a perspective view schematically showing the configuration of a second connection tab according to an embodiment of the present disclosure.

[0025] Figure 5 is a front view schematically showing the configuration of a second connection tab according to an embodiment of the present disclosure.

[0026] Figure 6 is a side view schematically showing the configuration of a second connection tab according to an embodiment of the present disclosure.

[0027] Figure 7 is a perspective view schematically showing the configuration of a fixing band according to an embodiment of the present disclosure.

[0028] Figure 8 is a front view schematically showing the configuration of a fixing band according to an embodiment of the present disclosure. Detailed Description

[0029] Here, some embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Terms or words used in this specification and the claims should not be construed as limited to their general or dictionary meanings, but should be interpreted as meanings and concepts consistent with the technical concept of the present disclosure based on the principle that the inventor can appropriately define terms as his / her own lexicographer.

[0030] The embodiments described in this specification and the configurations shown in the drawings are provided as some example embodiments of the present disclosure and do not represent all the technical concepts, aspects, and features of the present disclosure. Therefore, it will be understood that various equivalents and modifications that can replace or modify the embodiments described herein may exist at the time of filing this application.

[0031] It will be understood that when an element or layer is referred to as being "on", "connected to", or "coupled to" another element or layer, it can be directly on, directly connected to, or directly coupled to the other element or layer, or there may also be one or more intervening elements or layers. When an element or layer is referred to as being "directly on", "directly connected to", or "directly coupled to" another element or layer, there are no intervening elements or layers. For example, when a first element is described as being "coupled" or "connected" to a second element, the first element can be directly coupled to or directly connected to the second element, or the first element can be indirectly coupled to or indirectly connected to the second element via one or more intervening elements.

[0032] In the figures, for clarity of illustration, the dimensions of various elements, layers, etc. may be exaggerated. Like reference numerals denote like or similar elements. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Further, when describing embodiments of the present disclosure, the use of "may" refers to "one or more embodiments of the present disclosure". Expressions such as "at least one of..." and "any one of..." modify the entire list of elements following them, rather than individual elements in the list. When phrases such as "at least one of A, B, and C", "at least one of A, B, or C", "at least one selected from the group consisting of A, B, and C", or "at least one selected from among A, B, and C" are used to denote a list of elements A, B, and C, the phrase may refer to any suitable combination or subset of A, B, and C and all suitable combinations or subsets, such as A, B, C, A and B, A and C, B and C, or A and B and C. As used herein, the term "use" and its variants may be considered to be synonymous with the term "utilize" and its variants, respectively. As used herein, the terms "substantially", "about", and similar terms are used as approximate terms and not as terms of degree, and are intended to account for the inherent variations in measured or calculated values that would be recognized by a person of ordinary skill in the art.

[0033] It will be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, or section from another element, component, region, layer, or section. Thus, a first element, first component, first region, first layer, or first section discussed below may be referred to as a second element, second component, second region, second layer, or second section without departing from the teachings of the exemplary embodiments.

[0034] For ease of description, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. may be used herein to describe the relationship of one element or feature to another (other) element or feature as shown in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as "under" or "below" other elements or features will then be oriented "above" or "over" the said other elements or features. Thus, the term "under" can encompass both an upper and a lower orientation. The device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and the spatial relative descriptors used herein should be interpreted accordingly.

[0035] The terms used herein are for the purpose of describing embodiments of the present disclosure and are not intended to limit the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are also intended to include the plural forms. It will also be understood that when the terms "comprises", "comprising" and / or their variants are used in this specification, it is specified that there are the stated features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0036] In addition, any numerical range disclosed and / or recited herein is intended to include all sub-ranges of the same numerical precision contained within the recited range. For example, the range "1.0 to 10.0" is intended to include all sub-ranges between the recited minimum value 1.0 and the recited maximum value 10.0 (and including the recited minimum value 1.0 and the recited maximum value 10.0), i.e., having a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as, for example, 2.4 to 7.6. Any maximum numerical limit recited herein is intended to include all lower numerical limits contained therein, and any minimum numerical limit recited in this specification is intended to include all higher numerical limits contained therein. Accordingly, the applicant reserves the right to modify this specification as well as the claims to expressly recite any sub-ranges contained within the ranges expressly recited herein.

[0037] Referring to two compared elements, features, etc. as "the same" may mean that they are "substantially the same". Thus, the phrase "substantially the same" may include cases having a deviation considered low in the art (e.g., a deviation of 5% or less). Additionally, when a certain parameter is said to be uniform in a given region, this may mean that it is uniform in terms of the average value.

[0038] Throughout the specification, unless otherwise stated, each element may be singular or plural.

[0039] When any element is referred to as being disposed "above (or below)" or "on (or under)" a component, this may mean that the any element is placed in contact with the upper (or lower) surface of the component, and may also mean that another component may be disposed between the component and the any element disposed "above (or below)" or "on (or under)" the component.

[0040] In addition, it will be understood that when an element is referred to as being "coupled", "linked" or "connected" to another element, the elements can be "coupled", "linked" or "connected" directly to each other, or there can be one or more intervening elements therebetween, and the element can be "coupled", "linked" or "connected" to the other element through the intervening element. In addition, when a component is referred to as being "electrically coupled" to another component, the component can be directly electrically connected to the other component, or there can be one or more intervening components therebetween such that the component and the other component are indirectly electrically connected to each other.

[0041] Throughout the specification, unless otherwise stated, when stating "A and / or B", this means A, B, or A and B. That is, "and / or" includes any combination or all combinations of the listed items. Unless otherwise specified, when stating "C to D", this means C or greater and D or less.

[0042] The terms used in this specification are for describing embodiments of the present disclosure and are not intended to limit the present disclosure.

[0043] Figure 1 is a perspective view schematically showing the configuration of a battery pack according to an embodiment of the present disclosure, Figure 2 is an exploded perspective view schematically showing the configuration of a battery pack according to an embodiment of the present disclosure, and Figure 3 is a cross-sectional view schematically showing the configuration of a battery pack according to an embodiment of the present disclosure.

[0044] Referring to Figures 1 to 3 , the battery pack according to the present embodiment includes a battery cell 100, a platform 200, a protection circuit module (PCM) 300, a first connection tab 400, and a second connection tab 500.

[0045] The battery cell 100 is a unit structure for storing and supplying electric power, and can be a lithium secondary battery capable of charging and discharging a predetermined amount of electric power. The battery cell 100 according to the present embodiment can be a pouch-type battery cell including an electrode assembly 101 and an external material 102 surrounding the electrode assembly 101.

[0046] Although not shown in the drawings, the electrode assembly 101 can be formed in a wound type in which a first electrode plate, a second electrode plate, and a separator disposed between the first electrode plate and the second electrode plate are wound in the form of a jelly roll, or can be formed in a stacked type in which the first electrode plate, the second electrode plate, and the separator are stacked on each other.

[0047] The platform 200 extends from the battery cell 100 and supports the PCM 300, which will be described below, with respect to the battery cell 100. The platform 200 according to the present embodiment may be formed in the shape of a plate that horizontally extends from an end surface of the battery cell 100 in a direction parallel to the longitudinal direction of the battery cell 100. The platform 200 may be integrally formed with the battery cell 100, or may be separately manufactured from the battery cell 100 and then coupled to the battery cell 100. The lower surface of the platform 200 may be set to be spaced apart from the floor surface of the battery cell 100 by a predetermined distance.

[0048] The PCM 300 is disposed to face the platform 200 and is electrically connected to the battery cell 100 via a first connection tab 400 and a second connection tab 500, which will be described below. The PCM 300 may form a path for the charge / discharge current of the battery cell 100, or may perform a protection operation to prevent overheating or explosion due to overheating, overcharging, over-discharging, etc. of the battery cell 100.

[0049] The PCM 300 according to the present embodiment may include: a substrate 310 formed in a flat plate shape having opposite first and second surfaces 301 and 302; and an electronic device 320 mounted on at least one of the first and second surfaces 301 and 302 of the substrate 310 to form a path for the charge / discharge current of the battery cell 100, or to perform a protection operation to prevent overheating or explosion due to overheating, overcharging, over-discharging, etc. of the battery cell 100.

[0050] The first surface 301 of the substrate 310 may be set to face downward and face the upper surface of the platform 200. The second surface 302 of the substrate 310 may be set to face upward and face the upper space of the battery cell 100.

[0051] The first connection tab 400 extends from the platform 200 and is electrically connected to the battery cell 100. The first connection tab 400 may be formed as a pair of first connection tabs 400. One end of one of the pair of first connection tabs 400 and one end of the other of the pair of first connection tabs 400 may be respectively connected to first and second electrode plates of the battery cell 100 having different polarities. Here, when the first electrode plate is a negative electrode and the second electrode plate is a positive electrode, the first connection tab 400 connected to the first electrode plate may be formed of a nickel material, and the first connection tab 400 connected to the second electrode plate may be formed of an aluminum material.

[0052] The first connection tab 400 may be formed in the form of a thin sheet and may protrude outward from one end of the platform 200 toward the outside of the platform 200. The first connection tab 400 may extend in a direction away from the platform 200 in the longitudinal direction of the battery cell 100. The first connection tab 400 may be elastically deformable. After fastening the first connection tab 400 to the second connection tab 500, which will be described below, when the PCM 300 is placed on the platform 200, one end of the first connection tab 400 may be bent once in a direction approaching the platform 200. Thus, after completing the task of fastening the first connection tab 400 to the second connection tab 500, which will be described below, the position of the PCM 300 may be freely changed by the elastic deformation of the first connection tab 400 itself, and the assembly efficiency may be further improved.

[0053] The second connection tab 500 is disposed between the PCM 300 and the first connection tab 400 and electrically connects the PCM 300 to the battery cell 100. That is, the second connection tab 500 may serve as a component that provides an electrical connection between the PCM 300 and the battery cell 100 between the PCM 300 and the first connection tab 400. The second connection tab 500 may be formed as a pair of second connection tabs 500. Each of the pair of second connection tabs 500 may be connected to one first connection tab 400. The pair of second connection tabs 500 may be connected to the PCM 300 at different positions on the first surface 301 of the PCM 300.

[0054] Figure 4 is a perspective view schematically showing the configuration of a second connection tab according to an embodiment of the present disclosure, Figure 5 is a front view schematically showing the configuration of a second connection tab according to an embodiment of the present disclosure, and Figure 6 is a side view schematically showing the configuration of a second connection tab according to an embodiment of the present disclosure.

[0055] Referring to Figures 4 to 6 , the second connection tab 500 according to the present embodiment may include a first tab body 510, a second tab body 520, and a support member 530.

[0056] The first tab body 510 forms the outside of one side of the second connection tab 500 and is connected to the first connection tab 400. The first tab body 510 according to the present embodiment may be formed in a substantially flat plate shape. The first tab body 510 may be formed of a conductive material such as nickel. One end of the first connection tab 400 may contact and be fixed to the inner surface or the edge surface of the first tab body 510. The first connection tab 400 may be fixed to the first tab body 510 by various types of bonding methods such as adhesion, welding, and pressing. In this case, since both the first tab body 510 and the first connection tab 400 are formed of a conductive material, the first tab body 510 and the first connection tab 400 may be electrically connected.

[0057] The second tab body 520 forms the outside of the other side of the second connection tab 500 and is connected to the PCM 300. The second tab body 520 may be arranged to be spaced apart from the first tab body 510 and may be connected to the first tab body 510 via a support member 530 to be described below. The second tab body 520 according to the present embodiment may be formed in a substantially flat plate shape. The second tab body 520 may have the same shape as the first tab body 510, or may have a different shape from the first tab body 510. The second tab body 520 may be formed of a conductive material such as nickel. The outer surface of the second tab body 520 may contact the first surface 301 of the PCM 300 and may be fixed to the first surface 301 by various types of bonding methods such as welding and adhesion. In this case, since the second tab body 520 is formed of a conductive material, the second tab body 520 may be electrically connected to the PCM 300. The second tab body 520 may be supported by the support member 530 to be described below so as to be rotatable relative to the first tab body 510. Therefore, after the second tab body 520 is connected to the PCM 300, the mounting angle of the second tab body 520 relative to the first tab body 510 may be changed, and the PCM 300 may be guided to be placed on the platform 200.

[0058] The support member 530 is disposed between the first tab body 510 and the second tab body 520 and connects the first tab body 510 and the second tab body 520 to each other. The support member 530 may be arranged to have a deformable shape and may support the first tab body 510 and the second tab body 520 to be rotatable relative to each other by deforming its shape.

[0059] The support member 530 according to the present embodiment may include a bridge 531 and a notch 532.

[0060] The bridging member 531 is disposed between the first tab body 510 and the second tab body 520, and bends and deforms as the angle between the first tab body 510 and the second tab body 520 changes. The bridging member 531 may be formed as a plurality of bridging members 531. The plurality of bridging members 531 may be arranged to be spaced apart from each other in a first direction. Here, the first direction may be a direction parallel to the width direction of the first tab body 510 and the second tab body 520, that is, the X-axis direction based on Figures 4 to 6 In the following, an example in which the bridging member 531 is formed as a pair of bridging members 531 will be described.

[0061] The bridging member 531 according to the present embodiment may be formed in the shape of a plate having two ends respectively connected to one end of the first tab body 510 and one end of the second tab body 520 facing each other. A pair of bridging members 531 may be disposed at opposite ends of the second connecting tab 500. That is, a pair of bridging members 531 may be arranged to be maximally spaced apart within the entire width L of the first tab body 510 and the second tab body 520 in the width direction of the first tab body 510 and the second tab body 520. The bridging member 531 may be formed of the same material as the first tab body 510 and the second tab body 520. When the relative angle between the first tab body 510 and the second tab body 520 changes, the bridging member 531 may bend and deform in such a way that the two ends rotate in directions approaching or separating from each other with respect to the width direction of the first tab body 510 and the second tab body 520.

[0062] The width L of each bridging member 531 in the first direction (i.e., the width direction of the first tab body 510 and the second tab body 520) 1 may be greater than 1 mm and less than or equal to 1.6 mm. In this case, the total width L of the first tab body 510 and the second tab body 520 may be about 5.6 mm. When the width L of the bridging member 531 1 is less than or equal to 1 mm, the rigidity of the bridging member 531 is too weak, and there is a high risk of damage to the bridging member 531 when a drop impact occurs. At the same time, when the width L of the bridging member 531 1 exceeds 1.6 mm, the magnitude of the load required for the bending and deformation of the bridging member 531 is too large.

[0063] The thickness L of the bridging member 531 parallel to a second direction perpendicular to the first direction (i.e., the direction vertically passing through the two surfaces of the bridging member 531) (i.e., the Y-axis direction or the Z-axis direction based on Figures 4 to 6 may be greater than or equal to 0.1 mm and less than or equal to 0.127 mm. When the thickness L of the bridging member 531 2 is greater than or equal to 0.1 mm and less than or equal to 0.127 mm. When the thickness L of the bridging member 5312 When it is less than 0.1 mm, the rigidity of the bridging member 531 is too weak, and when a drop impact occurs, there is a great risk of damage to the bridging member 531. At the same time, when the thickness L of the bridging member 531 2 exceeds 0.127 mm, the magnitude of the load required for bending and deforming the bridging member 531 is too large.

[0064] The notch 532 is formed in a shape of a hole penetrating the second connection tab 500 in the second direction. The notch 532 can be used as a component for smooth bending and deformation of the bridging member 531 due to a part of the structure of the second connection tab 500 being removed. The notch 532 according to the present embodiment can be provided between a pair of bridging members 531. The width and thickness of the notch 532 can be varied according to the width L 1 and thickness L 2 of the bridging member 531. When three or more bridging members 531 are formed, the number of formed notches 532 can be one less than the number of bridging members 531, and the notches 532 can be provided to be spaced apart from each other in a direction parallel to the first direction (i.e., the width direction of the first tab body 510 and the second tab body 520). In this case, each notch 532 can be provided between a pair of adjacent bridging members 531. That is, the bridging members 531 and the notches 532 can be alternately arranged in the first direction.

[0065] The battery pack according to the present embodiment may further include a fixing band 600. The fixing band 600 may be in the form of a sheet having a surface coated with an adhesive material. The fixing band 600 may be bent into a substantially L-shaped configuration, and the inner surface of the fixing band 600 may be placed on the end surface of the battery cell 100 and the upper surface of the platform 200. The outer surface of the fixing band 600 placed on the upper surface of the platform 200 may be arranged to face the first surface 301 of the PCM 300, and the outer surface of the fixing band 600 placed on the end surface of the battery cell 100 may be arranged to face the side surface of the PCM 300.

[0066] The fixing band 600 according to the present embodiment may include an adhesive area 610 and a separation area 620.

[0067] The bonding area 610 may refer to an area on which an adhesive material is applied among the entire area of the outer surface of the fixing band 600 facing the PCM 300. When the PCM 300 is arranged to face the platform 200, at least a partial area of the bonding area 610 according to this embodiment may be arranged to face the electronic device 320 mounted on the first surface 301 of the PCM 300 and may be in direct contact with the electronic device 320. In this case, when the adhesive material is applied on the surface of the bonding area 610, the electronic device 320 may adhere to the surface of the bonding area 610. Therefore, the PCM 300 can be stably fixed on the platform 200 by the adhesive force between the bonding area 610 and the electronic device 320.

[0068] The separation area 620 may refer to an area on which no adhesive material is applied among the entire area of the outer surface of the fixing band 600 facing the PCM 300. When the PCM 300 is arranged to face the platform 200, the separation area 620 according to this embodiment may be arranged to face the second connection tab 500 connected to the first surface 301 of the PCM 300 and may be in direct contact with the first tab body 510 of the second connection tab 500. The area of the separation area 620 may be formed to be larger than the area of the second connection tab 500 arranged to face the fixing band 600 (i.e., the area of the first tab body 510). Since no adhesive material is applied on the surface of the separation area 620, the second connection tab 500 can be separated from the separation area 620. Therefore, by forming the separation area 620, which is a partial non-bonding area, in the area of the entire fixing band 600 that is in direct contact with the second connection tab 500, when a drop impact is applied to the second connection tab 500, the adhesive force between the fixing band 600 and the second connection tab 500 can be prevented from acting on the bridge 531 as an additional load, and the robustness of the bridge 531 against the drop impact can be improved.

[0069] Hereinafter, the present disclosure will be described in more detail using specific examples of the present disclosure. The following examples are provided only to assist in understanding the present disclosure, and the scope of the present disclosure is not limited thereto.

[0070] [Example 1]

[0071] Manufacture a battery pack including the second connection tab 500 and the fixing band 600. In the second connection tab 500, the entire width L of the first tab body 510 and the second tab body 520 is 5.6 mm, the width L of the bridge 531 1 is 1 mm, the thickness L of the bridge 531 2 is 0.1 mm, and the fixing band 600 only has the bonding area 610 and no separation area 620.

[0072] [Example 2]

[0073] Except for changing the width L of the bridging member 531 1 to 1.5 mm, the battery pack is manufactured in the same manner as in Example 1.

[0074] [Example 3]

[0075] Except for changing the width L of the bridging member 531 1 to 1.6 mm, the battery pack is manufactured in the same manner as in Example 1.

[0076] [Example 4]

[0077] Except for changing the width L of the bridging member 531 1 to 2.3 mm and not forming the notch 532, the battery pack is manufactured in the same manner as in Example 1.

[0078] [Example 5]

[0079] Except for changing the thickness L of the bridging member 531 2 to 0.127 mm, the battery pack is manufactured in the same manner as in Example 1.

[0080] [Example 6]

[0081] Except for changing the width L of the bridging member 531 1 to 1.5 mm, the battery pack is manufactured in the same manner as in Example 5.

[0082] [Example 7]

[0083] Except for changing the width L of the bridging member 531 1 to 1.6 mm, the battery pack is manufactured in the same manner as in Example 5.

[0084] [Example 8]

[0085] Except for changing the width L of the bridging member 531 1 to 2.3 mm and not forming the notch 532, the battery pack is manufactured in the same manner as in Example 5.

[0086] [Example 9]

[0087] Except for changing the thickness L of the bridging member 531 2 to 0.13 mm, the battery pack is manufactured in the same manner as in Example 1.

[0088] [Example 10]

[0089] The battery pack is manufactured in the same manner as in Example 2, except that the fixed 600 is changed to have a separated area 620.

[0090] In Examples 1 to 3, Examples 5 to 7, and Example 10, during the bending deformation of the bridging member 531, warping of the first tab body 510 and the second tab body 520 or warping of the substrate 310 of the PCM 300 was not observed.

[0091] In Examples 4, 8, and 9, during the bending deformation of the bridging member 531, warping of the first tab body 510 and the second tab body 520 or warping of the substrate 310 of the PCM 300 was observed. That is, it was confirmed that when the width L of the bridging member 531 1 exceeds 1.6 mm or the thickness L of the bridging member 531 2 exceeds 0.127 mm, adjusting the angle between the first tab body 510 and the second tab body 520 requires an excessive load, and the manufacturing process is not smoothly performed.

[0092] [Experimental Example 1]

[0093] Among the above examples, except for Examples 4, 8, and 9, continuous drop tests were performed on Examples 1 to 3, Examples 5 to 7, and Example 10.

[0094] The continuous drop test was performed by the following steps: repeatedly dropping the battery pack according to each example from a height of about 1 m 400 times, and observing whether the bridging member 531 breaks at the 200th drop, 250th drop, 300th drop, 350th drop, and 400th drop. The continuous drop test for each example was performed in parallel with 16 identical battery packs.

[0095] Table 1 shows the results of evaluating the performance of the battery pack according to each example through the continuous drop test.

[0096] [Table 1]

[0097] 200th time 250th time 300th time 350th time 400th time Example 1 0 / 16 2 / 16 2 / 16 4 / 16 6 / 16 Example 2 0 / 16 0 / 16 0 / 16 2 / 16 2 / 16 Example 3 0 / 16 0 / 16 0 / 16 1 / 16 2 / 16 Example 5 0 / 16 0 / 16 1 / 16 3 / 16 4 / 16 Example 6 0 / 16 0 / 16 0 / 16 1 / 16 2 / 16 Example 7 0 / 16 0 / 16 0 / 16 1 / 16 1 / 16 Example 10 0 / 16 0 / 16 0 / 16 0 / 16 1 / 16

[0098] Using Table 1 above to compare Examples 1, 2, 3, 5, 6, and 7, it can be confirmed that in Examples 1 and 5 where the width L of the bridging member 531 1 is 1 mm, compared with Examples 2, 3, 6, and 7 where the width L of the bridging member 531 1 is greater than 1 mm, the percentage of battery packs damaged due to the drop impact is higher.

[0099] Comparing Comparative Example 2, Example 6, and Example 10, it can be confirmed that in Example 10 in which the separation region 620 is formed in the fixing band 600, the reliability against the dropping impact is relatively higher than that in Example 2 and Example 6 in which the separation region 620 is not formed in the fixing band 600.

[0100] According to one or more embodiments of the present disclosure, since the bridging member that is bent and deformed during the process of connecting the battery cell and the PCM ensures sufficient rigidity, a stable power supply can be maintained even when an external impact is repeatedly applied.

[0101] In addition, according to one or more embodiments of the present disclosure, by forming the separation region of the partial non-bonding portion in the region that is in direct contact with the second connection tab among the entire region of the fixing band, when a dropping impact is applied to the second connection tab, the adhesive force of the fixing band can be prevented from acting on the bridging member as an additional load, and damage to the bridging member caused by the dropping impact can be prevented.

[0102] However, the effects obtainable by the present disclosure are not limited to the above effects, and other technical effects not mentioned will be clearly understood by those skilled in the art from the description of the present disclosure.

[0103] Although the present disclosure has been described with reference to the embodiments shown in the drawings, these embodiments are merely illustrative, and it should be understood that those skilled in the art can derive various modifications and other equivalent embodiments based on the embodiments.

Claims

1. A battery pack, characterized in that: The battery pack comprises: Battery cells; a platform extending from the battery cell; A protection circuit module, arranged to face the platform; a first connection tab extending from the platform and electrically connected to the battery cell; and A second connection tab is disposed between the protection circuit module and the first connection tab and is configured to electrically connect the protection circuit module to the battery cell.

2. The battery pack according to claim 1, characterized in that: The second connecting terminal piece comprises: A first connecting piece body connected to the first connecting piece; a second tab body disposed to be spaced apart from the first tab body and connected to the protection circuit module; and A support member is disposed between the first tab body and the second tab body and is configured to support the first tab body and the second tab body to be rotatable relative to each other.

3. The battery pack according to claim 2, characterized in that: The supporting member comprises: a plurality of bridge members configured to bend and deform as an angle between the first tab body and the second tab body changes, and disposed to be spaced apart from each other in a first direction; and The notch is configured to penetrate the second connection terminal in a second direction perpendicular to the first direction.

4. The battery pack according to claim 3, characterized in that: The notch is disposed between a pair of adjacent bridge members.

5. The battery pack according to claim 3, characterized in that: The plurality of bridges are formed as a pair of bridges, and a width of the bridge parallel to the first direction is greater than 1 mm and less than or equal to 1.6 mm.

6. The battery pack according to claim 5, characterized in that: The pair of bridge members are respectively disposed at both ends of the second connection tab.

7. The battery pack according to claim 5, characterized in that: The thickness of the bridge member parallel to the second direction is greater than or equal to 0.1 mm and less than or equal to 0.127 mm.

8. The battery pack according to claim 1, characterized in that: The first connection tab extends in a direction away from the platform, and one end of the first connection tab is bent in a direction approaching the platform.

9. The battery pack according to claim 1, characterized in that: The first connecting tab is elastically deformable.

10. The battery pack according to claim 1, characterized in that: The battery pack further includes a fixing band disposed between the platform and the protection circuit module and configured to fix the protection circuit module to the platform.

11. The battery pack according to claim 10, characterized in that: The protection circuit module comprises: A first surface, arranged to face the fixing belt; and a second surface disposed at an opposite side of the first surface, Wherein, the second connecting terminal is arranged on the first surface.

12. The battery pack according to claim 11, characterized in that: The fixing belt comprises: an adhesive region disposed to face the protection circuit module and to which an electronic device is adhered; and The separation region is disposed to face the second connection tab and is configured to be separated from the second connection tab.

13. The battery pack according to claim 12, characterized in that: The area of ​​the separation region is larger than the area of ​​the second connection tab disposed to face the fixing tape.

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