Battery pack

Abstract

A battery pack includes a battery cell having one or more electrode tabs, a case accommodating the battery cell, and a protection circuit module including a substrate. One or more substrate tabs on the substrate are connected to the one or more electrode tabs. A molded portion is provided on the substrate, and the molded portion includes a main body and a plurality of buffer members provided on the main body.

Description

[0001] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0095486 filed in the Korean Intellectual Property Office on July 21, 2023, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0002] One or more embodiments relate to a battery pack. Background Art

[0003] Unlike non-rechargeable primary batteries, secondary batteries refer to rechargeable batteries. Secondary batteries are used as energy sources for mobile devices, electric vehicles, hybrid vehicles, electric bicycles, uninterruptible power supplies, etc. Depending on the type of external device to which the secondary battery is applied, the secondary battery is used in the form of a single battery or in the form of a group in which a plurality of batteries are connected and packaged into one unit.

[0004] The improvement of the operating performance of the processor included in the electronic device and the increase in the power requirement of the electric vehicle naturally lead to the increase in the capacity of the secondary battery. In addition, since the secondary battery should consider the convenience of the user and ensure the required power in a limited space, the overcharge blocking voltage of the secondary battery has gradually increased, and the over-discharge blocking voltage has gradually decreased, so the applicable area of ​​the secondary battery pack has been expanded.

[0005] A battery pack includes a protection circuit module to prevent overcharge, overdischarge, overcurrent and short circuit of battery cells during use. The protection circuit module performs an overcharge protection function to prevent expansion and explosion due to gas and heat generated from the battery cells when the battery cells are overcharged above a protection voltage. The protection circuit module also performs an overdischarge protection function to prevent the battery cells from being damaged due to discharge below an appropriate voltage. The protection circuit module further performs an overcurrent blocking function to prevent the battery cells or the protection circuit module from being damaged due to overcurrent caused by an error or malfunction of an external device, and performs a short circuit protection function to prevent the battery cells or the protection circuit module from being damaged due to a short circuit of an external load.

[0006] Unlike the related art protection circuit module in which components are mounted on a substrate, there is a molded protection circuit module (MPCM) in which a molded part including a field effect transistor (FET), a photonic integrated circuit (PIC), and passive elements is coupled to the substrate. However, unlike the related art protection circuit module, in this molded type protection circuit module, during a battery drop test, a large area may collide with a jig used in the drop test, and cracks may occur in the molded part.

[0007] The information described in this background technology section was known to the inventor before the implementation of the present disclosure, or was technical information obtained during the implementation of the present disclosure. Therefore, this section may contain information that does not constitute prior art previously known to the public before the present disclosure. Summary of the invention

[0008] One or more embodiments include a battery pack in which a molded portion of a protection circuit module includes a buffer member to effectively absorb an impact applied to the protection circuit module when the battery pack is dropped.

[0009] However, the problems solved by the present disclosure herein are merely exemplary, and the problems to be solved by the present disclosure are not limited to those explicitly disclosed herein.

[0010] Additional aspects will be set forth in part in the description which follows and will be obvious from the description, or may be learned by practice of the embodiments presented in the disclosure.

[0011] According to one or more embodiments, a battery pack includes: a battery cell including one or more electrode terminals; a shell that accommodates the battery cell; and a protection circuit module including a substrate, one or more substrate terminals provided on the substrate and connected to the one or more electrode terminals, and a molded portion provided on the substrate, wherein the molded portion includes: a main body; and a plurality of buffer members provided on the main body.

[0012] The plurality of buffer members may be provided on side surfaces of the body opposite to each other in a width direction of the body.

[0013] The molding part may further include a plurality of receiving grooves recessed inwardly in both side surfaces of the body, and the plurality of buffer members may be provided in the plurality of receiving grooves.

[0014] A portion of each of the plurality of buffer members may be received in one of the receiving grooves, and another portion of each of the plurality of buffer members may protrude outward from one of the side surfaces of the body.

[0015] The plurality of receiving grooves may be spaced apart from each other in a length direction of the body, and may form a plurality of rows in a height direction of the body.

[0016] The plurality of receiving grooves included in one row may be coaxial with the plurality of receiving grooves included in an adjacent row in the length direction of the body.

[0017] The plurality of receiving grooves included in one row may alternate with the plurality of receiving grooves included in an adjacent row in the length direction of the body.

[0018] A distance between centers of the plurality of receiving grooves included in one row may be greater than a diameter of the plurality of receiving grooves.

[0019] A distance between end portions of two adjacent receiving grooves included in adjacent rows and adjacent to each other in the height direction of the body may be smaller than a diameter of the plurality of receiving grooves.

[0020] The plurality of receiving grooves in one side surface of the body may alternate with the plurality of receiving grooves in the other side surface of the body in a width direction of the body.

[0021] A line passing through centers of the plurality of receiving grooves in the other side surface of the body may extend to a center between two adjacent receiving grooves in the one side surface of the body.

[0022] The plurality of accommodating grooves may be spaced apart from each other in the length direction of the main body and may form a plurality of rows in the height direction of the main body, and the plurality of accommodating grooves included in one row may alternate with the plurality of accommodating grooves included in an adjacent row in the length direction of the main body.

[0023] The plurality of receiving grooves may have a hemispherical shape or a partially cut spherical shape.

[0024] In a width direction of the body, the inner end portions of the plurality of receiving grooves may be closer to an outer surface of the body than inner end portions of the plurality of receiving grooves are closer to a central portion of the body.

[0025] A size of portions of the plurality of buffer members received in the plurality of receiving grooves may be greater than a size of portions of the plurality of buffer members protruding to the outside of the plurality of receiving grooves.

[0026] In a width direction of the body, the inner end portions of the plurality of receiving grooves may be closer to a central portion of the body than inner end portions of the plurality of receiving grooves are closer to an outer surface of the body.

[0027] The molding portion may further include a plurality of accommodating grooves extending between one side surface and the other side surface of the main body in the width direction of the main body, and the plurality of buffer members may fill the plurality of accommodating grooves so that both ends of each of the plurality of buffer members protrude outwardly beyond the side surface of the main body.

[0028] In a height direction of the main body, lower ends of the plurality of receiving grooves may be above a central portion of the main body.

[0029] In a width direction of the body, cross-sectional areas of the plurality of receiving grooves may increase toward a central portion of the body.

[0030] The plurality of buffer members may be located on a side surface of the body in a width direction of the body, and a plane at which the plurality of buffer members and the body contact each other may be on the same plane as the side surface.

[0031] In addition to those described above, other aspects, features and advantages will become apparent from the following detailed description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and other aspects, features and advantages of certain embodiments of the present disclosure will become more apparent through the following description in conjunction with the accompanying drawings, in which:

[0033] Figure 1 illustrates a state in which a battery cell and a housing are coupled to each other;

[0034] Figure 2 illustrating a surface of a protection circuit module;

[0035] Figure 3 illustrating a side surface of a protection circuit module;

[0036] Figure 4 illustrating another surface of the protection circuit module;

[0037] Figure 5 illustrates a state where a cushioning member is applied to a molded portion;

[0038] Figure 6 illustrating a surface of a molded portion;

[0039] Figure 7 illustrating a side surface of a molded portion;

[0040] Figure 8 illustrating a side surface of a molded portion;

[0041] Fig. 9 illustrating a surface of a molded portion;

[0042] Fig.10 illustrating a surface of a molded portion;

[0043] Fig.11 Example molding department;

[0044] Fig.12 illustrating a surface of a molded portion;

[0045] Fig.13 illustrating a surface of the molded portion; and

[0046] Fig.14 One surface of the molded portion is illustrated. DETAILED DESCRIPTION

[0047] Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings, wherein the same reference numerals indicate the same elements throughout. In this regard, the embodiments may have different forms and should not be construed as being limited to the description set forth herein. Therefore, the embodiments are described below only by reference to the accompanying drawings to explain various aspects of the description.

[0048] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Expressions such as "at least one of...", if preceding / following a list of elements, modify the entire list of elements rather than the individual elements in the list.

[0049] Some embodiments of the present disclosure and the method according to the present disclosure can be understood with reference to the detailed description and the accompanying drawings of the embodiments. The described embodiments may have various modifications and be implemented in different forms, and the present disclosure is not limited to the embodiments described herein. In addition, some or all of the features of the various embodiments of the present disclosure may be combined with each other. The various embodiments may be implemented independently or in association with each other. The described embodiments are provided as examples so that the present disclosure may be thorough and complete, and it is also intended to fully convey the spirit of the present disclosure to those of ordinary skill in the art to which the present disclosure belongs. The present disclosure may include all modifications, equivalents and substitutions within the spirit and scope of the present disclosure. Therefore, processes, elements and techniques that are not necessary for those of ordinary skill in the art to understand may not be described.

[0050] Unless otherwise expressly stated throughout the drawings and the present disclosure, the same reference numerals, features, or combinations thereof may indicate the same elements, and therefore, for the sake of brevity, redundant descriptions thereof may be omitted. In addition, for the sake of clarity in describing the present disclosure, descriptions not related to the present disclosure may be omitted.

[0051] In the drawings, the relative sizes of elements, layers, and regions may be exaggerated for clarity. The use of hatching and / or shading in the drawings is generally intended to make the boundaries between adjacent elements clear. Therefore, the presence or absence of hatching or shading may not indicate a desired form or requirement for a particular material, material property, size, ratio, commonality between graphic elements, and / or other characteristics, properties, attributes, etc. of an unspecified element.

[0052] Various embodiments may be described herein with reference to cross-sectional illustrations as schematic illustrations of embodiments and / or intermediate structures. Therefore, the shape of the figure may vary, for example, due to manufacturing technology and / or tolerances. In addition, the specific structural or functional descriptions given herein are only examples of embodiments for describing the concepts according to the present disclosure. Therefore, the embodiments described herein should not be interpreted as being limited to the shape of the illustrated area, and may include, for example, shape changes according to the manufacturing process.

[0053] The regions illustrated in the figures may be schematic in nature and their shapes may not be intended to illustrate and define the actual shape of a region of a device. Furthermore, as one of ordinary skill in the art would appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present disclosure.

[0054] Many specific details may be presented herein to provide a complete understanding of the various embodiments. However, the various embodiments may be implemented without the specific details or with one or more of the specific details. In other cases, known structures and devices may be illustrated in block diagram form to avoid unnecessary confusion of the various embodiments.

[0055] For the convenience of description herein, spatial relative terms such as "below", "above", "below" and "above" may be used to describe the relationship between an element or feature and another element or feature as shown in the drawings. In addition to the directions illustrated in the drawings, spatial relative terms may be intended to include various directions of the device in use or operation. For example, if the device in the drawings flips, the elements or features described as "below" or "below" other elements or features may be oriented to be "above" other elements or features. Therefore, the exemplary terms "below" and "below" may include both above and below directions. The device may be oriented in other directions (e.g., rotated 90 degrees or other directions), and the spatial relative terms used herein should be interpreted accordingly. Similarly, if the first portion is described as being arranged "above" the second portion, this may refer to the first portion being arranged above or below the second portion.

[0056] The expression "in a plan view" may refer to observing a portion of an object from above, and the expression "in a schematic cross-sectional view" may refer to a schematic cross-section obtained by vertically cutting a portion of an object. The expression "in a side view" may refer to a first object that may be above, below, or beside a second object, and vice versa. In addition, the terms "overlapping" or "covering" may include layering, stacking, facing, extending, covering, partially covering, or any other suitable term that a person of ordinary skill in the art can understand. The expression "non-overlapping" may include meanings such as "separated" or "spaced apart" and any other suitable equivalents that a person of ordinary skill in the art can recognize and understand. The terms "facing" and "facing" may mean that a first object may directly or indirectly face a second object. If a third object is between the first object and the second object, the first object and the second object may indirectly face each other while facing each other.

[0057] If an element, layer, region or component is referred to as being "formed", "connected" or "coupled" to another element, it can be said that it is directly formed on a layer, region or component; formed on another component, another layer, another region or another component; or indirectly formed on, connected to or coupled to another component. It can also be collectively referred to as a direct or indirect combination or connection of elements, layers, regions or components and an integral or non-integral combination or connection, so that one or more elements, layers, regions or components may exist. For example, when an element, layer, region or component is referred to as being "electrically connected" or "electrically coupled" to another element, layer, region or component, it can be said that it is directly electrically connected or coupled to another element, layer, region or component, or other elements, layers, regions or components may exist. However, "direct connection" or "direct coupling" may refer to a component being directly connected or coupled to another component or directly on another component without an intermediate component therebetween. In addition, in this article, if a part of a layer, film, region, guide plate, etc. is formed on another part, the formation direction is not limited to its upper surface, and the part may also be formed on the side surface or lower surface of another part. If a portion of a layer, film, region, guide, etc. is formed "under" another portion, the portion may be "directly under" the other portion, or there may be other intervening portions between the portion and the other portion. Additionally, other expressions such as "between," "directly between," "adjacent," and "directly adjacent" that describe the relationship between components may also be similarly interpreted. Additionally, if an element or layer is referred to as being "between" two elements or layers, it may be the only element or layer between the two elements or layers, or there may be one or more other intervening elements or layers between them.

[0058] For the purposes of this disclosure, expressions such as "at least one of" or "any of" do not define the order of the individual elements. For example, "at least one of X, Y, and Z" or "at least one selected from the group consisting of X, Y, and Z" may include only X, only Y, only Z, or any combination of two or more of X, Y, and Z. Similarly, expressions such as "at least one of A and B" may include A, B, or A and B. Throughout this disclosure, the term "and / or" may include any and all combinations of one or more of the listed associated items. For example, expressions such as "A and / or B" may include A, B, or A and B.

[0059] Although various elements, components, regions, layers and / or cross sections can be described herein using terms such as "first", "second" and "third", these elements, components, regions, layers and / or cross sections will not be limited by these terms. These terms are only used to distinguish an element, component, region, layer or cross section from another element, component, region, layer or cross section. Therefore, without departing from the spirit and scope of the present disclosure, the first element, component, region, layer or cross section described below may be referred to as the second element, component, region, layer or cross section. Describing an element as a "first" element may not require or imply the presence of a second element or other elements. Terms such as "first" and "second" may be used herein to distinguish between different categories or element groups. For clarity of description, terms such as "first" and "second" may refer to "first class (or first group)" and "second class (or second group)" respectively.

[0060] The terms used herein are only used to describe specific embodiments and are not intended to limit the scope of the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form may also be intended to include the plural form, and the plural form may also be intended to include the singular form. The terms "include", "comprises", and "have" used herein may be intended to specify the presence of the features, integers, steps, or operations. These terms may not be intended to exclude the presence or addition of one or more other functions, steps, operations, parts, and / or groups thereof.

[0061] If one or more embodiments can be implemented differently, the specific process order can be performed differently from the described order. For example, two processes described in succession can be performed substantially simultaneously or in the reverse order of the described order.

[0062] The terms "substantially," "about," "approximately," and similar terms may be used as terms of approximation rather than terms of degree, and may be intended to describe the inherent deviations of measured or calculated values. As used herein, the terms "substantially," "about," "approximately," and similar terms are used as terms of approximation rather than terms of degree, and are intended to take into account the inherent deviations of measured or calculated values ​​that one of ordinary skill in the art would be aware of. "Approximately" or "approximately" as used herein are inclusive of the stated value and refer to within an acceptable range of deviation of a particular value determined by one of ordinary skill in the art taking into account the errors associated with the measurement in question and the measurement of the particular value (i.e., the limitations of the measurement system). For example, "approximately" may mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the stated value. Further, "may" is used when describing embodiments of the present disclosure to refer to "one or more embodiments of the present disclosure"

[0063] Unless otherwise defined, all terms (including technical and scientific terms) used herein may have the same meaning as those commonly understood by those of ordinary skill in the art to which the present disclosure belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and / or the present disclosure, and should not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0064] Figure 1 exemplifying a battery cell 110 and a housing 120 that can be coupled to each other, Figure 2 One surface of the protection circuit module 130 is illustrated, Figure 3 The side surface of the protection circuit module 130 is illustrated, Figure 4 The other surface of the protection circuit module 130 is illustrated. Figure 5 exemplifies a state in which the buffer member 1333 is applied to the molded portion 133, and Figure 6 One surface of the molded portion 133 is illustrated.

[0065] The battery pack 10 may be a pouch-type secondary battery and may be used with a desktop computer, a tablet personal computer, a smart phone, a laptop personal computer, etc. In other embodiments, the battery pack 10 may be a can-type or cylindrical secondary battery and may be used for a tablet personal computer, a smart phone, a vehicle, etc. Hereinafter, for ease of description, the description will focus on an embodiment in which the battery pack 10 is a pouch-type battery pack.

[0066] The battery pack 10 may include a battery cell 110 , a case 120 , and a protective circuit module 130 .

[0067] The battery cell 110 may be manufactured in the form of a core by winding a separator 113 between a first electrode plate 111 and a second electrode plate 112. In other embodiments, the battery cell 110 may be manufactured in the form of a stack by stacking a separator 113 between a plurality of first electrode plates 111 and a plurality of second electrode plates 112. In other embodiments, the battery cell 110 may be manufactured by applying a core and a stack.

[0068] The first electrode plate 111 may include a first active material coating portion formed by intermittently coating the first active material on a first base material as a sheet-shaped conductive material and a first uncoated portion as a portion where the first base material is exposed due to the first active material not being coated. For example, the first electrode plate 111 may be a negative electrode plate, and the first active material may be a negative electrode active material including a carbon material such as crystalline carbon, amorphous carbon, a carbon composite or carbon fiber, lithium metal or a lithium alloy.

[0069] The second electrode plate 112 may have a different polarity from the first electrode plate 111. The second electrode plate 112 may include a second active material coating portion formed by intermittently coating a second active material on a second base material as a sheet-shaped conductive material and a second non-coating portion as a portion where the second base material is exposed due to non-coating of the second active material. For example, the second electrode plate 112 may be a positive electrode plate, and the second active material may include a second active material such as LiCoO2, LiNiO2, LiMnO2, LiMn2O4, LiNi 1-x-y Co x M y A positive electrode active material containing lithium of O2 (wherein M is a metal) or LiFePO4 (LFP).

[0070] The separator 113 may be located between the first electrode plate 111 and the second electrode plate 112. The separator 113 may insulate the first electrode plate 111 and the second electrode plate 112 from each other and may provide for lithium ion exchange between the first electrode plate 11 and the second electrode plate 112. The separator 113 may have a sufficient length to completely insulate the first electrode plate 111 from the second electrode plate 112 even if the battery cell 110 contracts or expands during charge / discharge of the battery pack 10.

[0071] One or more electrode tabs 114 may be on one side of the battery cell 110. The electrode tab 114 may be a pair of electrode tabs 114 corresponding to the first electrode plate 111 and the second electrode plate 112. The pair of electrode tabs 114 may be provided to the first electrode plate 111 and the second electrode plate 112, respectively, and may protrude on one side thereof. One of the electrode tabs 114 may be electrically connected to one side of the first uncoated portion of the first electrode plate 111 and may extend toward the outside of the battery cell 110. Another of the electrode tabs 114 may be electrically connected to one side of the second uncoated portion of the second electrode plate 112 and may extend toward the outside of the battery cell 110.

[0072] Each of the electrode tabs 114 may be provided with a film 115. The film 115 may be provided on one side surface of the electrode tab 114 or may cover the electrode tab 114. The film 115 may seal the electrode tab 114 exposed to the outside of the battery cell 110. For example, in order to prevent a short circuit from occurring due to the electrode tab 114 contacting an exposed metal layer at an end portion of a seal 124 of the housing 120 (which will be described below), the film 115 may be heat-fused to the seal 124 so that the electrode tab 114 and the seal 124 are tightly coupled to each other.

[0073] The housing 120 may form the exterior of the battery pack 10, and the battery cell 110 is located in the housing 120. The shape and size of the housing 120 are not limited, and may have a shape and size corresponding to the shape and size of the battery cell 110. Figure 1 As shown in , the housing 120 may have a rectangular hexahedron shape with an open interior. Alternatively, the housing 120 may have a polyhedron shape or a cylindrical shape. The housing 120 may include a cover 121, a lower housing 122, an internal space 123, and a seal 124.

[0074] The lower case 122 may include an inner space 123 having a size larger than that of the battery cell 110, and the battery cell 110 may be inserted into the inner space 123. The cover 121 may be provided on the upper surface of the lower case 122 in an openable / closable manner to cover the battery cell 110 when the battery cell 110 is inserted into the inner space 123.

[0075] The seal 124 may be positioned along the upper edge of the lower housing 122. Figure 1 As shown in , in a state where the battery cell 110 is accommodated in the case 120, a portion of the electrode tab 114 may be exposed to the outside of the case 120. The film 115 provided at the electrode tab 114 may be located between the cover 121 and the lower case 122 in the region of the seal 124. Therefore, the battery cell 110 is accommodated in the case 120.

[0076] The protection circuit module 130 may include circuits and various components for preventing overcharge, overdischarge, overcurrent, and short circuit of the battery cell 110. Figure 1 As shown in , the protection circuit module 130 may be provided outside the housing 120 and may be connected to the electrode tabs 114. The protection circuit module 130 may have a flat plate shape to support a pair of electrode tabs 114. The protection circuit module 130 may include a substrate 131, a connection portion 132, and a molding portion 133.

[0077] like Figure 1 As shown in , the substrate 131 may support other components of the protection circuit module 130, a connection portion 132 for connecting an external device (e.g., a controller) and the protection circuit module 130 to each other may be on one side of the substrate 131, and a molding portion 133 is provided on one side surface of the substrate 131. A control circuit and various components for controlling overcharge, overdischarge, and overcurrent of the battery cell 110 may be located on the substrate 131.

[0078] The substrate 131 may include one or more substrate wiring sheets 1311. Figures 1 to 3As shown in , a plurality of substrate tabs 1311 may be spaced apart from each other along the surface of the substrate 131. The number of substrate tabs 1311 may be equal to the number of electrode tabs 114 of the battery cell 110, for example, there may be two electrode tabs 114. A first portion of the substrate tab 1311 may be located on the upper surface of the substrate 131, and a second portion may be bent relative to the first portion. In a state where the electrode tab 114 is located at a portion of the substrate tab 1311 on the substrate 131, the substrate tab 1311 may be bent toward the electrode tab 114, and then the electrode tab 114 and the substrate tab 1311 may be connected to each other by laser welding or the like. The substrate tab 1311 may include a metal material such as nickel.

[0079] The connection portion 132 may have a thin plate shape and may connect the external device and the substrate 131 to each other. The connection portion 132 may include a connection area 1322 connected to the substrate 131 at one end thereof and a connector 1321 for connecting to the external device at the other end thereof. In the connection area 1322, the connection portion 132 may be connected to the substrate 131 by welding or the like.

[0080] The molded portion 133 may be provided on a surface of the substrate 131 opposite to the surface on which the substrate terminal tab 1311 is provided. The molded portion 133 may be on the rear surface of the substrate 131 and may have the same length as that of the substrate 131. In an exemplary embodiment, the length L of the molded portion 133 may be about 40 mm to about 50 mm, and the width W of the molded portion 133 may be about 3 mm to about 4 mm. In an exemplary embodiment, the length L of the molded portion 133 may be about 42 mm to about 46 mm, and the width W of the molded portion 133 may be about 3.2 mm to about 3.8 mm.

[0081] Various components such as FET, P-IC, and passive elements for controlling the battery cell 110 may be provided inside the molded portion 133. Therefore, in the protection circuit module 130, not all components need to be mounted on the substrate 131, and in a configuration where all or some components are located at the molded portion 133, these components may be simply and firmly on the substrate 131 by coupling the molded portion 133 to the substrate 131.

[0082] like Figure 3 As shown in FIG, the total thickness T1 of the protection circuit module 130 including the substrate 131, the connection part 132 and the molding part 133 may be about 2 mm to about 3 mm. In a more specific embodiment, the total thickness T1 of the protection circuit module 130 may be about 2.3 mm to about 2.7 mm.

[0083] like Figure 3As shown in , the thickness T2 of the substrate 131 and the molding part 133 may be about 1 mm to about 2 mm. In a more specific embodiment, the thickness T2 of the substrate 131 and the molding part 133 may be about 1.2 mm to about 1.8 mm.

[0084] The molding part 133 may include a body 1331, a receiving groove 1332, and a buffer member 1333. Figure 5 As shown in FIG. 1 , the body 1331 may form an outer shape of the molding part 133 and may have a plurality of parts therein. The body 1331 may have a rectangular hexahedral shape and one surface thereof may be located on the substrate 131 .

[0085] A plurality of receiving grooves 1332 may be provided in one or both side surfaces of the body 1331. Figure 5 and Figure 6 As shown in , a plurality of receiving grooves 1332 may be spaced apart from each other in a row on both side surfaces of the main body 1331 in the length direction of the main body 1331 (e.g., the X-axis direction). The receiving grooves 1332 may be recessed inwardly on the side surface of the main body 1331 in the width direction of the main body 1331 (e.g., the Y-axis direction), and may have a hemispherical shape or a partially cut spherical shape. In a configuration in which a plurality of buffer members 1333 are provided in the plurality of receiving grooves 1332, a portion of each of the buffer members 1333 may be received in one of the receiving grooves 1332, and another portion of each buffer member 1333 may protrude outwardly beyond the side surface of the main body 1331. As shown in FIG. Figure 6 , the receiving groove 1332 may have a hemispherical shape, and the buffer member 1333 may have a spherical shape, wherein half of the buffer member 1333 is received in the receiving groove 1332, and the other half of the buffer member 1333 protrudes outward from the side surface of the body 1331. The size of the portion of the buffer member 1333 received in the receiving groove 1332 may be larger than the size of the buffer member 1333 protruding to the outside of the receiving groove 1332.

[0086] Figure 5 and Figure 6 It is illustrated that 10 receiving grooves 1332 are formed in each of the two side surfaces of the body 1331. However, the number of the receiving grooves 1332 may be 9 or less or 11 or more. The receiving grooves 1332 respectively provided in the two side surfaces of the body 1331 may be at the same position in the length direction of the body 1331.

[0087] The buffer member 1333 may be applied to the receiving groove 1332 by the coating device C. A portion of the buffer member 1333 applied to the receiving groove 1332 may be received in the receiving groove 1332, and another portion of the buffer member 1333 may protrude outward from the receiving groove 1332 to the outside of the side surface of the body 1331. Therefore, if the battery pack 10 falls, the buffer member 1333 may first collide with another object (e.g., the ground) or the like to absorb the impact applied to the protection circuit module 130, thereby preventing the substrate 131, the connection portion 132, and / or the molded portion 133 from being damaged. The buffer member 1333 may include silicone or a UV coating agent.

[0088] The receiving groove 1332 and the buffer member 1333 may be formed on both side surfaces of the body 1331, and the receiving groove 1332 may be formed only to a shallow depth in the body 1331 so as not to affect the plurality of components inside the molding part 133. In the width direction (e.g., Y-axis direction) of the body 1331, the inner end portion of the receiving groove 1332 may be closer to the outer surface of the body 1331 than the central portion of the body 1331. For example, the depth of the receiving groove 1332 may be about 1% to about 5% of the width of the body 1331.

[0089] Therefore, in the battery pack 10 , the molded part 133 of the protective circuit module 130 may include a plurality of buffer members 1333 at both side surfaces of the body 1331 , thereby preventing the molded part 133 from being damaged by absorbing impact applied to the molded part 133 when the battery pack 10 falls.

[0090] Figure 7 The side surface of the molding portion 133A according to other embodiments is illustrated.

[0091] Compared with the above-mentioned molding part 133, the molding part 133A according to the present embodiment may have a different configuration in terms of the receiving groove 1332A and the buffer member 1333A. Hereinafter, for the convenience of description, the molding part 133A will be described focusing on aspects different from those of the molding part 133, and other aspects of the molding part 133A may be the same as those of the molding part 133.

[0092] The molding part 133A may include a main body 1331A, a receiving groove 1332A, and a buffer member 1333A. The receiving groove 1332A may be formed in both side surfaces of the main body 1331A and be recessed inward in the width direction (eg, Y-axis direction) of the main body 1331A, and may have a plurality of rows of receiving grooves 1332A. Figure 7As shown in , a plurality of receiving grooves 1332A may be spaced apart from each other in a row in the length direction (e.g., X-axis direction) of the main body 1331A. Multiple rows of receiving grooves 1332A may be formed in the height direction (e.g., Z-axis direction) of the main body 1331A. The receiving grooves 1332A in adjacent rows may be at the same position in the length direction of the main body 1331A. For example, a plurality of receiving grooves 1332A included in a row may be coaxial with a plurality of receiving grooves 1332A included in an adjacent row in the length direction of the main body 1331A.

[0093] The rows of receiving grooves 1332A may be spaced apart from each other in the height direction of the body 1331A, and the plurality of receiving grooves 1332A in one row may be spaced apart from each other by a distance D1 in the length direction of the body 1331A. Here, the distance D1 is the distance between the centers of adjacent receiving grooves 1332A, and may be greater than the diameter of the receiving grooves 1332A. The distance D2 between the rows of receiving grooves 1332A may be less than the diameter of the receiving grooves 1332A, wherein the distance D2 is the distance between the upper end and the lower end of the receiving groove 1332A. Figure 7 Two rows of receiving grooves 1332A are illustrated; however, the number of rows may be three or more.

[0094] The buffer member 1333A may be applied to each of the plurality of receiving grooves 1332A. Figure 7 As shown in , a plurality of buffer members 1333A may also be arranged in the length direction and the height direction of the main body 1331A. In a state where some portions of the buffer member 1333A are accommodated in the accommodation groove 1332A, other portions of the buffer member 1333A may protrude outside the main body 1331A. Therefore, if the battery pack 10 falls, the buffer member 1333A may contact another object. In this way, the molded portion 133A may improve the buffering effect by having multiple rows of buffer members 1333A on both side surfaces of the main body 1331A.

[0095] Figure 8 The side surface of the molded portion 133B is illustrated.

[0096] Compared with the above-mentioned molding part, the molding part 133B according to the present embodiment may have a different configuration in terms of the receiving groove 1332B and the buffer member 1333B. Hereinafter, for the convenience of description, the molding part 133B will be described focusing on aspects different from those of the above-mentioned molding part, and other aspects of the molding part 133B may be the same as those of the above-mentioned molding part.

[0097] The molding part 133B may include a main body 1331B, a receiving groove 1332B, and a buffer member 1333B. The receiving groove 1332B may be formed in both side surfaces of the main body 1331B and be recessed inwardly in the width direction of the main body 1331B. The receiving groove 1332B may be formed in a plurality of rows. Figure 8 As shown in , a plurality of receiving grooves 1332B can be spaced apart from each other in the length direction (e.g., X-axis direction) of the main body 1331B to form a row. In addition, multiple rows of receiving grooves 1332B can be in the height direction (e.g., Z-axis direction) of the main body 1331B. The receiving grooves 1332B in adjacent rows can be at different positions in the length direction of the main body 1331B. For example, one receiving groove 1332B in the first row can be between two adjacent receiving grooves 1332B in the second row, and vice versa.

[0098] Multiple rows of receiving grooves 1332B may be spaced apart from each other in the height direction of the main body 1331B, and multiple receiving grooves 1332B in one row may be spaced apart from each other by a distance D1 in the length direction of the main body 1331B. In this article, distance D1 is the distance between the centers of adjacent receiving grooves 1332B, and may be greater than the diameter of the receiving groove 1332B. In addition, the distance D2 between multiple rows of receiving grooves 1332B may be less than the diameter of the receiving groove 1332B, wherein the distance D2 is the distance between the end portions of two adjacent receiving grooves 1332B in the height direction of the main body 1331B. In addition, the receiving groove 1332B between two adjacent receiving grooves 1332B in the second row and in the first row may be spaced apart from each other by a distance D3 in the length direction of the main body 1331B, wherein the distance D3 is the distance between the centers of the receiving grooves 1332B. The distance D3 may be greater than the diameter of the receiving groove 1332B. In addition, the receiving grooves 1332B in the second row can be arranged so that a line passing through the center of the receiving grooves 1332B in the second row passes through the center between two adjacent receiving grooves 1332B in the first row, and vice versa. The plurality of receiving grooves 1332B included in any row can be alternated with the plurality of receiving grooves 1332B included in the adjacent row in the length direction of the body 1331B. Therefore, the plurality of receiving grooves 1332B in different rows can alternate with each other in a zigzag manner.

[0099] The buffer member 1333B may be applied to each of the plurality of receiving grooves 1332B. Figure 8As shown in , a plurality of buffer members 1333B may also be arranged in the length direction and height direction of the main body 1331B. In a state where some parts of the buffer member 1333B are accommodated in the accommodating groove 1332B, other parts of the buffer member 1333B may protrude to the outside of the main body 1331B. Therefore, if the battery pack 10 falls, the buffer member 1333B may contact another object. Therefore, the molded portion 133B may improve the buffering effect by having multiple rows of buffer members 1333B on both side surfaces of the main body 1331B. In addition, the buffer members 1333B in different rows may be in a zigzag manner, thereby preventing an impact from being applied in the space between adjacent buffer members 1333B when the battery pack 10 falls.

[0100] Fig. 9 One surface of the molded portion 133C is illustrated.

[0101] Compared with the molding part according to the above-described embodiment, the molding part 133C according to this embodiment may have a different configuration in terms of the receiving groove 1332C and the buffer member 1333C. Hereinafter, for ease of description, the molding part 133C will be described focusing on aspects different from those of the above-described molding part, and other aspects of the molding part 133C may be the same as those of the above-described molding part.

[0102] The molding portion 133C may include a main body 1331C, a receiving groove 1332C, and a buffer member 1333C. The receiving groove 1332C may be formed in both side surfaces of the main body 1331C and may be recessed inwardly in the width direction (e.g., the Y-axis direction) of the main body 1331C. The plurality of receiving grooves 1332C in the first side surface of the main body 1331C may alternate with the plurality of receiving grooves 1332C in the second side surface of the main body 1331C in a zigzag manner. For example, the plurality of receiving grooves 1332C in one side surface of the main body 1331C may alternate with the plurality of receiving grooves 1332C in the other side surface of the main body 1331C in the width direction of the main body 1331C. The plurality of receiving grooves 1332C in one of the side surfaces of the main body 1331C may be on a line extending to the center between two adjacent receiving grooves 1332C in the other side surface of the main body 1331C, and vice versa.

[0103] like Fig. 9 As shown in , the plurality of receiving grooves 1332C of the body 1331C may be spaced apart from each other by a distance D1 in the length direction of the body 1331C. Herein, the distance D1 is the distance between the centers of adjacent receiving grooves 1332C, and the distance D1 may be greater than the diameter of the receiving groove 1332C. Fig. 9As shown in , the receiving groove 1332C in one side surface of the body 1331C and the receiving groove 1332C in the other side surface of the body 1331C may be spaced apart from each other by a distance D2, wherein the distance D2 is the distance between the centers of adjacent receiving grooves 1332C. The distance D2 may be smaller than the diameter of the receiving groove 1332C. Therefore, the plurality of receiving grooves 1332C in one side surface and the other side surface of the body 1331C may alternate with each other in a zigzag manner.

[0104] The buffer member 1333C may be applied to each of the plurality of receiving grooves 1332C. Fig. 9 As shown in , the buffer members 1333C may also alternate with each other in a zigzag manner on one side surface and the other side surface of the main body 1331C. In a state where some parts of the buffer members 1333C are accommodated in the accommodation grooves 1332C, other parts of the buffer members 1333C may protrude to the outside of the main body 1331C, so that if the battery pack 10 falls, the buffer members 1333C may contact another object. In this way, the molded part 133C can improve the buffering effect by alternating the buffer members 1333C on both side surfaces of the main body 1331C.

[0105] Fig.10 One surface of the molded portion 133D is illustrated.

[0106] Compared with the molding part 133 according to the above-described embodiment, the molding part 133D according to this embodiment may have a different configuration in terms of the receiving groove 1332D and the buffer member 1333D. Hereinafter, for ease of description, the molding part 133D will be described focusing on aspects different from those of the above-described molding part, and other aspects of the molding part 133D may be the same as those of the above-described molding part.

[0107] The molding part 133D may include a body 1331D, a receiving groove 1332D, and a buffer member 1333D.

[0108] The receiving grooves 1332D may be formed in both side surfaces of the body 1331D and may be recessed inwardly in a width direction (e.g., Y-axis direction) of the body 1331D. The plurality of receiving grooves 1332D in one side surface of the body 1331D may alternate with the plurality of receiving grooves 1332D in the other side surface of the body 1331D in a zigzag manner. Fig.10As shown in , the multiple receiving grooves 1332D of the main body 1331D may be spaced apart from each other by a distance D1 in the length direction thereof. Herein, the distance D1 is the distance between the centers of adjacent receiving grooves 1332D, and may be greater than the diameter of the receiving grooves 1332D. Furthermore, in addition to the multiple receiving grooves 1332D in the first side surface of the main body 1331D, a plurality of receiving grooves 1332D may be provided in the second side surface of the main body 1331D, such that a line extending through the central portions of the multiple receiving grooves 1332D in the first side surface extends through the central portion between two adjacent receiving grooves 1332D in the second side surface, and vice versa. As Fig.10 As shown in , the receiving groove 1332D in one side surface of the body 1331D and the receiving groove 1332D in the other side surface of the body 1331D may be spaced apart from each other by a distance D2, wherein the distance D2 is the distance between the centers of adjacent receiving grooves 1332D. The distance D2 may be smaller than the diameter of the receiving groove 1332D. Therefore, the plurality of receiving grooves 1332D in one side surface and the other side surface of the body 1331D may alternate with each other in a zigzag manner.

[0109] The receiving grooves 1332D may be formed in multiple rows. Fig.10 As shown in , a plurality of receiving grooves 1332D may be spaced apart from each other in the length direction (e.g., the X-axis direction) of the main body 1331D to form a row. In addition, a plurality of rows of receiving grooves 1332D may be provided in the height direction (e.g., the Z-axis direction) of the main body 1331D. The receiving grooves 1332D in adjacent rows may be at different positions in the length direction of the main body 1331D. For example, a line passing through the center of one receiving groove 1332D in the first row may extend between two adjacent receiving grooves 1332D in the second row. Fig.10 In the embodiment, the upwardly exposed receiving groove 1332D may refer to the receiving groove 1332D located above in the height direction of the main body 1331D, and the receiving groove 1332 partially covered between two adjacent receiving grooves 1332D may refer to the receiving groove 1332D located below in the height direction.

[0110] The plurality of receiving grooves 1332D may be spaced apart from each other in the length direction of the main body 1331D, and may form a plurality of rows in the height direction of the main body 1331D, and the plurality of receiving grooves 1332D included in any row may alternate with the plurality of receiving grooves 1332D included in the adjacent row in the length direction of the main body 1331D. Therefore, the plurality of receiving grooves 1332D may form a plurality of rows that alternate in a zigzag manner in the width direction of the main body 1331D and in a zigzag manner in the height direction of the main body 1331D.

[0111] The buffer member 1333D may be applied to each of the plurality of receiving grooves 1332D. Fig.10 As shown in , the buffer members 1333D may also be formed in a plurality of rows that alternate in a zigzag manner at one side surface and the other side surface of the main body 1331D and in a zigzag manner in the height direction of the main body 1331D. A portion of each of the buffer members 1333D is accommodated in one of the accommodating grooves 1332D, and another portion of the buffer member 1333D may protrude to the outside of the main body 1331D. Therefore, if the battery pack 10 falls, the buffer member 1333D may contact another object. Therefore, the molded portion 133D may improve the buffering effect by alternating the buffer members 1333D on both side surfaces of the main body 1331D. In addition, the buffer members 1333D in different rows may be in a zigzag manner, thereby preventing the impact from being applied to the space between adjacent buffer members 1333D when the battery pack 10 falls.

[0112] Fig.11 The molded portion 133E is illustrated, and Fig.12 One surface of the molded portion 133E is illustrated.

[0113] Compared with the molding part according to the above-mentioned embodiment, the molding part 133E according to this embodiment may have a different configuration in terms of the receiving groove 1332E and the buffer member 1333E. Hereinafter, for the convenience of description, the molding part 133E will be described focusing on aspects different from those of the above-mentioned molding part, and other aspects of the molding part 133E may be the same as those of the above-mentioned molding part.

[0114] The molding part 133E may include a body 1331E, a receiving groove 1332E, and a buffer member 1333E.

[0115] A plurality of accommodating grooves 1332E may be formed to extend between the two side surfaces of the main body 1331E. That is, unlike the accommodating grooves according to the above-described embodiments, the accommodating grooves 1332E may be formed to pass through the main body 1331E so as to be between one side surface and the other side surface of the main body 1331E in the width direction of the main body 1331E. A plurality of accommodating grooves 1332E may be separated from each other in the length direction of the main body 1331E. The accommodating grooves 1332E may be coaxial with the main body 1331E, and the diameter of the accommodating grooves 1332E at both ends thereof may be less than 40%, less than 30%, or less than 20% of the height H1 of the main body 1331E.

[0116] The receiving groove 1332E may have a shape such that its cross-sectional area varies in the width direction of the body 1331E. The receiving groove 1332E may have a cylindrical shape, or may have a shape whose cross-sectional area gradually increases toward the central portion of the body 1331E in the width direction of the body 1331E.

[0117] The receiving groove 1332E may be above the central portion of the main body 1331E in the height direction of the main body 1331E. Fig.11 As shown in , the lower end of the receiving groove 1332E may be spaced apart from the central portion of the body 1331E by a height H2. Therefore, components (eg, FET, P-IC, and passive elements) inside the molded part 133E may not interfere with the receiving groove 1332E and the buffer member 1333E.

[0118] The buffer member 1333E may be applied to each of the plurality of receiving grooves 1332E. Fig.12 As shown in , the buffer member 1333E can fill the receiving groove 1332E, and both ends of the buffer member 1333E can protrude to the outside of the main body 1331E on both side surfaces of the main body 1331E. Both ends of the buffer member 1333E in the width direction can have a shape that protrudes outward from the main body 1331E, and the shape can be a hemisphere or a partially cut sphere.

[0119] The molded portion 133E can improve the buffering effect by allowing the buffer member 1333E to pass through the body 1331E in the width direction of the body 1331E. The buffer member 1333E can fill the receiving groove 1332E, thereby not only absorbing the impact when the battery pack 10 falls and contacts an external object, but also effectively absorbing the impact applied to the body 1331E.

[0120] Fig.13 One surface of the molded portion 133F is illustrated.

[0121] Compared with the molding part according to the above-mentioned embodiment, the molding part 133F according to this embodiment may have a different configuration in terms of the receiving groove 1332F and the buffer member 1333F. Hereinafter, for the convenience of description, the molding part 133F will be described focusing on aspects different from those of the above-mentioned molding part, and other aspects of the molding part 133F may be the same as those of the above-mentioned molding part.

[0122] The molding part 133F may include a body 1331F, a receiving groove 1332F, and a buffer member 1333F.

[0123] The receiving groove 1332F may be formed in each of the two side surfaces of the main body 1331F, and a plurality of receiving grooves 1332F may be positioned separately from each other in the length direction of the main body 1332F. The receiving groove 1332F may have a length L2, and the length L2 may be less than a length L1 corresponding to half the width of the main body 1331F. For example, unlike the receiving groove 1332E passing through the main body 1331E described above, the receiving groove 1332F according to the present embodiment may be formed in each of the two side surfaces of the main body 1331F, and the receiving grooves 1332F formed in the two side surfaces of the main body 1331F are not open to each other.

[0124] In the width direction (e.g., Y-axis direction) of the main body 1331F, the inner end portion of the receiving groove 1332F may be closer to the central portion of the main body 1331F than to the outer surface of the main body 1331F. The length L2 from the side surface of the main body 1331F to the inner end portion of the receiving groove 1332F may be about 55% to about 95% of the length L1 from the side surface of the main body 1331F to the center of the main body 1331F in the width direction. For example, the length L2 of the receiving groove 1332F may be about 60% to about 90% of the length L1. The receiving groove 1332F may have a rectangular hexahedral shape or a similar shape. Therefore, the buffer member 1333F may be more stably accommodated in the receiving groove 1332F, so that it may not be separated from the receiving groove 1332F even when an external impact is applied to the main body 1331F.

[0125] The lower end of the receiving groove 1332F may be above the central portion of the body 1331F so that the receiving groove 1332F may not interfere with components (eg, FET, P-IC, and passive elements) in the molding part 133F.

[0126] The buffer member 1333F may be applied to each of the plurality of receiving grooves 1332F. Fig.13 As shown in , the buffer member 1333F may be applied to the inside of the receiving groove 1332F, wherein the end of the buffer member 1333F contacts the inner surface of the receiving groove 1332F, and the opposite end of the buffer member 1333F protrudes to the outside of the side surface of the body 1331F. The end of the buffer member 1333F may have an outwardly convex shape and may have a hemispherical or partially cut spherical shape.

[0127] Because some parts of the buffer member 1333F protrude to the outside of the main body 1331F and the buffer member 1333F is deeply accommodated in the accommodation groove 1332F, the molded part 133F can improve the buffering effect. The buffer member 1333F can fill the accommodation groove 1332F, and thus not only absorb the impact when the battery pack 10 falls and contacts an external object, but also effectively absorb the impact applied to the main body 1331F. In addition, the buffer member 1333F can be more stably accommodated in the accommodation groove 1332F, and thus can not be easily separated from the accommodation groove 1332F.

[0128] Fig.14 One surface of the molded portion 133G is illustrated.

[0129] Compared with the molding part 133 according to the above-described embodiment, the molding part 133G according to this embodiment may not include a receiving groove and may have a buffer member 1333G formed in a different form. Hereinafter, for ease of description, the molding part 133G will be described focusing on aspects different from those of the above-described molding part, and other aspects of the molding part 133G may be the same as those of the above-described molding part.

[0130] like Fig.14 As shown in , the molding part 133G may include a main body 1331G and a buffer member 1333G. A plurality of buffer members 1333G may be on both side surfaces of the main body 1331G. The buffer member 1333G may have a hemispherical or partially cut spherical shape, and may be located on the side surface of the main body 1331G without being inserted into the main body 1331G. For example, the molding part 133G may include a plurality of buffer members 1333G on both side surfaces of the main body 1331G without a receiving groove in which the buffer member 1333G is received. Therefore, a plurality of buffer members 1333G may be provided on both side surfaces of the main body 1331G in the width direction, and the plane where the plurality of buffer members 1333G and the main body 1331G contact each other may be on the same plane as the side plane.

[0131] The plurality of buffer members 1333G on one side surface of the body 1331G and the plurality of buffer members 1333G on the other side surface of the body 1331G may be at the same position in the length direction of the body 1331G. In other embodiments, the plurality of buffer members 1333G on the first side surface of the body 1331G may be arranged so that a line passing through the center portion of the buffer member 1333G on the first side surface in the width direction extends through the center portion of the plurality of buffer members 1333G on the second side surface of the body 1331G. The buffer member 1333G may include silicone or a UV coating agent.

[0132] The molded part 133G may absorb the shock if the battery pack 10 falls. The buffer member 1333G may be provided to the body 1331G without providing a receiving groove in the body 1331G.

[0133] In the battery pack according to the embodiment of the present disclosure, the molding part of the protection circuit module may include a receiving groove and a buffer member received in the receiving groove, thereby preventing damage to the molding part and impact applied when the battery pack is dropped.

[0134] In the battery pack according to the embodiment of the present disclosure, the buffer member may be received in the plurality of receiving grooves which are recessed with respect to the molded part, thereby absorbing impact applied to the molded part.

[0135] The battery pack according to an embodiment of the present disclosure may include a plurality of buffer members in a length direction and / or a height direction so as to absorb impact applied to the molding part.

[0136] It should be understood that the embodiments described herein should be considered in a descriptive sense only and not for restrictive purposes. The description of features or aspects within each embodiment should generally be considered applicable to other similar features or aspects in other embodiments. Although one or more embodiments have been described with reference to the accompanying drawings, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present disclosure as defined by the claims.

Claims

1. A battery pack comprising: A battery cell, including one or more electrode tabs; A housing for accommodating the battery cell; as well as A protection circuit module includes a substrate, one or more substrate terminals provided on the substrate and connected to the one or more electrode terminals, and a molding portion provided on the substrate, The molding part comprises: main body; as well as A plurality of buffer members are provided on the main body. 2 . The battery pack according to claim 1 , wherein the plurality of buffer members are provided on side surfaces of the body opposite to each other in a width direction of the body.

3. The battery pack according to claim 1, wherein the molding part further comprises a plurality of receiving grooves recessed inwardly in the side surface of the body, and wherein the plurality of buffer members are provided in the plurality of accommodation grooves. 4 . The battery pack according to claim 3 , wherein a portion of each of the plurality of buffer members is received in one of the plurality of receiving grooves, and another portion of each of the plurality of buffer members protrudes outward from one of the side surfaces of the body. 5 . The battery pack according to claim 3 , wherein the plurality of receiving grooves are spaced apart from each other in a length direction of the body and form a plurality of rows in a height direction of the body. 6 . The battery pack according to claim 5 , wherein the plurality of receiving grooves included in one row are coaxial with the plurality of receiving grooves included in an adjacent row in the length direction of the body. 7 . The battery pack according to claim 5 , wherein the plurality of receiving grooves included in one row alternate with the plurality of receiving grooves included in an adjacent row in the length direction of the main body. 8 . The battery pack according to claim 5 , wherein a distance between centers of the plurality of receiving grooves included in one row is greater than a diameter of the plurality of receiving grooves. 9 . The battery pack according to claim 5 , wherein a distance between end portions of two adjacent receiving grooves included in adjacent rows and adjacent to each other in the height direction of the body is smaller than a diameter of the plurality of receiving grooves. 10 . The battery pack according to claim 3 , wherein the plurality of receiving grooves in one side surface of the body alternate with the plurality of receiving grooves in the other side surface of the body in a width direction of the body. 11 . The battery pack according to claim 10 , wherein a line passing through centers of the plurality of receiving grooves in the other side surface of the body extends to a center between two adjacent receiving grooves in the one side surface of the body.

12. The battery pack according to claim 10, wherein the plurality of receiving grooves are spaced apart from each other in the length direction of the body and form a plurality of rows in the height direction of the body, and The plurality of receiving grooves included in one row alternate with the plurality of receiving grooves included in an adjacent row in the length direction of the main body. 13 . The battery pack according to claim 3 , wherein the plurality of receiving grooves have a hemispherical shape or a partially cut spherical shape. 14 . The battery pack according to claim 3 , wherein in a width direction of the body, inner end portions of the plurality of receiving grooves are closer to an outer surface of the body than inner end portions of the plurality of receiving grooves are closer to a central portion of the body. 15 . The battery pack according to claim 3 , wherein sizes of portions of the plurality of buffer members received in the plurality of receiving grooves are larger than sizes of portions of the plurality of buffer members protruding outside the plurality of receiving grooves. 16 . The battery pack according to claim 3 , wherein in a width direction of the body, inner end portions of the plurality of receiving grooves are closer to a central portion of the body than inner end portions of the plurality of receiving grooves are closer to an outer surface of the body.

17. The battery pack according to claim 1, wherein the molding part further comprises a plurality of accommodation grooves extending between one side surface and the other side surface of the body in a width direction of the body, and The plurality of buffer members fill the plurality of receiving grooves such that both ends of each of the plurality of buffer members protrude outwardly beyond the side surface of the body.

18. The battery pack according to claim 17, wherein: In a height direction of the main body, lower ends of the plurality of receiving grooves are above a central portion of the main body.

19. The battery pack according to claim 17, wherein: In the width direction of the body, cross-sectional areas of the plurality of receiving grooves increase toward a center portion of the body.

20. The battery pack according to claim 1, wherein the plurality of buffer members are located on a side surface of the body in a width direction of the body, and A plane where the plurality of buffer members and the main body contact each other is on the same plane as the side surface.

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