Battery case and pouch-type secondary battery comprising same

Abstract

A battery case and a pouch-type (type) secondary battery including the same are provided. The battery case includes: an accommodating portion accommodating an electrode assembly to which an electrode lead is attached; and a sealing portion provided along an outer periphery of the accommodating portion, sealing the accommodating portion, and having a side from which the electrode lead is drawn out, in which the outer periphery of the accommodating portion is defined by a first edge on which the electrode lead is arranged and a second edge forming a predetermined angle with the first edge, a bent portion having a set or predetermined depth is formed to extend in the sealing portion, and the sealing portion is bent from the bent portion toward the receiving portion.

Description

Technical Field

[0001] One or more embodiments of this disclosure relate to a battery housing and a pouch-type (type) secondary battery including the battery housing. Background Technology

[0002] Unlike primary batteries, which are not designed to be rechargeable, secondary batteries are both rechargeable and dischargeable.

[0003] Small-capacity rechargeable batteries are generally used in small portable electronic devices, such as smartphones, feature phones, laptops, digital cameras, and portable camcorders. Large-capacity rechargeable batteries are widely used as the motor drive power source for hybrid and / or electric vehicles, or as energy storage devices (storage batteries) in energy storage systems (ESS) or power walls.

[0004] Pouch-type (type) secondary batteries are typically formed by sealing the edges of the battery casing to isolate the inside of the casing from the outside (external sealing). One or more attempts have been made to improve the airtightness and insulation of the battery casing.

[0005] The above information, which serves as the background of this disclosure, is provided only to facilitate and enhance understanding of the background of this disclosure, and may include information that does not constitute related technology. Summary of the Invention

[0006] One or more aspects of embodiments of this disclosure relate to battery housings and pouch-type (type) secondary batteries, each having improved airtightness and insulation by specifying the position where the sides of the battery housing or pouch-type (type) secondary battery are bent to enable the installation of a protective member having a predetermined shape.

[0007] However, the technical aspects of this disclosure are not limited to the above-described technical solutions, and additional aspects will be set forth in part in the description which follows, and in part will be apparent from the description, or may be learned by practice of the embodiments presented.

[0008] According to one or more embodiments of the present disclosure, a battery housing includes: a receiving portion for receiving an electrode assembly on which electrode leads are attached; and a sealing portion disposed along the outer periphery of the receiving portion to seal the receiving portion and a side having the electrode leads withdrawn therefrom, wherein the outer periphery of the receiving portion is defined by a first edge on which the electrode leads are disposed and a second edge forming a predetermined angle with the first edge, a curved portion having a predetermined depth is formed to extend in the sealing portion, and the sealing portion bends from the curved portion toward the receiving portion.

[0009] In one or more embodiments, the bend may include a first bend that is spaced apart from and / or separated from the first edge by a predetermined distance (e.g., spaced apart or separated) and extends in a direction parallel to the first edge.

[0010] In one or more embodiments, the sealing portion may include a platform portion extending from a first edge and a wing portion connected to the platform portion and extending from a second edge, the wing portion being bendable toward the receiving portion, the platform portion being bendable toward the receiving portion from a first bend portion, and the side of the wing portion protruding in the direction in which the electrode lead is pulled out being bendable toward the receiving portion from the first bend portion.

[0011] In one or more embodiments, the battery housing may further include a protective member having an insertion slot formed therein and covering a predetermined area of ​​a wing, the edge of which is inserted into the insertion slot.

[0012] In one or more embodiments, the protective member may have a shape that bends at a position corresponding to the first bend.

[0013] In one or more embodiments, the wing may include a first side covering one side of the receiving portion and a second side covering one side of the platform portion, and the protective member may include a first isolator covering the first side and a second isolator covering the second side.

[0014] In one or more embodiments, the bend may include a second bend that is spaced apart from and / or separated from the second edge by a predetermined distance (e.g., spaced apart or separated) and extends in a direction parallel to the second edge.

[0015] In one or more embodiments, the sealing portion may include a notch at the opposite end of the bend.

[0016] In one or more embodiments, the battery housing may further include an upper housing and a lower housing facing each other and connected to form a seal, wherein a bend is formed in at least one of the upper housing and the lower housing.

[0017] In one or more embodiments, the bend can be formed by arranging a plurality of bend grooves at a preset interval, the plurality of bend grooves having a set or predetermined depth.

[0018] In one or more embodiments, the depth of the bend (e.g., a set depth) may be at least about 40 μm, but not more than about 60 μm.

[0019] According to one or more embodiments of the present disclosure, a pouch-type secondary battery includes: an electrode assembly; electrode leads attached to the electrode assembly; and a battery housing including a receiving portion and a sealing portion, the receiving portion accommodating the electrode assembly to which the electrode leads are attached, the sealing portion being disposed along the outer periphery of the receiving portion to seal the receiving portion, and having a side from which the electrode leads are withdrawn, wherein the outer periphery of the receiving portion is defined by a first edge on which the electrode leads are disposed and a second edge forming a predetermined angle with the first edge, a bend having a set or predetermined depth being formed to extend in the sealing portion, and the sealing portion bending from the bend toward the receiving portion.

[0020] In one or more embodiments, the bend may include a first bend that is spaced apart from and / or separated from the first edge (e.g., spaced apart or separated) by a predetermined distance and extends in a direction parallel to the first edge.

[0021] In one or more embodiments, the sealing portion may include: a platform portion extending from a first edge; and a wing portion connected to the platform portion and extending from a second edge, the wing portion being bendable toward the receiving portion, the platform portion being bendable from the first bend portion toward the receiving portion, and the wing portion protruding from the first bend portion toward the receiving portion on the side where the electrode lead is pulled out.

[0022] In one or more embodiments, the battery housing may further include a protective member having an insertion slot formed therein and covering a predetermined area of ​​the wing, the edge of the wing being inserted into the insertion slot.

[0023] In one or more embodiments, the protective member may have a shape that bends at a position corresponding to the first bend.

[0024] In one or more embodiments, the wing may include a first side covering one side of the receiving portion and a second side covering one side of the platform portion, and the protective member may include a first isolator covering the first side and a second isolator covering the second side.

[0025] In one or more embodiments, the bend may include a second bend that is spaced apart from and / or separated from the second edge by a predetermined distance (e.g., spaced apart or separated) and extends in a direction parallel to the second edge.

[0026] In one or more embodiments, the sealing portion may include a notch at the opposite end of the bend.

[0027] In one or more embodiments, the battery housing may further include an upper housing and a lower housing, the upper housing and the lower housing facing each other and connected to form a seal, wherein a bend is formed in at least one of the upper housing and the lower housing.

[0028] In one or more embodiments, the bend can be formed by arranging a plurality of bend grooves at a preset interval, the plurality of bend grooves having a set or predetermined depth. Attached Figure Description

[0029] The accompanying drawings illustrate exemplary embodiments of this disclosure and are intended to aid in a further understanding of the technical ideas of this disclosure, together with the detailed description of this disclosure that follows. Therefore, this disclosure should not be construed as limited to the matters shown in such drawings. Furthermore, the above and other aspects, features, and advantages of certain embodiments of this disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings.

[0030] Figure 1 This is an exploded perspective view of a pouch-type (type) secondary battery according to one or more embodiments of the present disclosure;

[0031] Figure 2 According to one or more embodiments of this disclosure Figure 1 A perspective view of a bag-type (type) secondary battery in a sealed state;

[0032] Figures 3 to 6 This illustrates the use of one or more embodiments according to this disclosure. Figure 2 A view of the process by which the shape of a pouch-type (type) secondary battery is partially deformed;

[0033] Figure 7 According to one or more embodiments of this disclosure Figure 6 The cross-sectional view taken by line I-I'; and

[0034] Figure 8 According to one or more embodiments of this disclosure Figure 6 The cross-sectional view taken from line II-II'. Detailed Implementation

[0035] In the following, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. The terms and words used in this disclosure and the appended claims should not be construed as limited to their ordinary or dictionary meanings, and should be interpreted as having meanings and concepts consistent with the technical spirit of the present disclosure, based on the principle that the inventors may appropriately or suitably define the concepts of the terms to best describe their invention. Therefore, it should be understood that the configurations shown in the drawings and embodiments described in this disclosure are merely illustrative embodiments of the present disclosure and do not represent all the technical ideas of the present disclosure, such that one or more suitable equivalents and variations may exist at the time of filing this application.

[0036] When used herein, “comprising / including…” and / or “containing / including…” and / or “having / having…” specify the presence of the mentioned shape, quantity, step, operation, component, part, and / or group thereof, and do not exclude the presence or addition of one or more different shapes, quantities, operations, components, parts, and / or groups thereof. Additionally, the terms “comprising / including…”, “containing / including…”, “having / having…”, or other similar terms include or support the terms “consisting of…” and “substantially consisting of…”, indicating the presence of the stated shape, quantity, step, operation, component, and / or part, while other shapes, quantities, steps, operations, components, and / or parts are absent or substantially absent. Furthermore, the use of “may” in describing embodiments of this disclosure means “one or more embodiments of this disclosure”.

[0037] To aid in understanding this disclosure, the accompanying drawings may not be shown to scale and some component dimensions may be exaggerated. In different embodiments, the same reference numerals may be assigned to the same components.

[0038] The statement that two comparison targets are “identical” to each other can mean that they are “substantially identical” to each other. Therefore, embodiments that are “substantially identical” to each other can include embodiments that have a deviation considered to be low (e.g., 5% or less). When a uniformity parameter is uniform within a set or predetermined region, it can mean that it is substantially uniform from an average perspective.

[0039] Although the terms "first," "second," etc., can be used to describe one or more suitable components, these components are not limited by these terms. These terms are only used to distinguish one component from others, and unless specifically stated otherwise, the first component may be referred to as the second component.

[0040] Throughout this disclosure, unless specifically stated to the contrary, each part may be singular or plural. For example, as used herein, the singular forms “a” and “the” are intended to also include the plural forms, unless the context clearly indicates otherwise.

[0041] When a component is arranged "on top (or bottom)" of or "above (or below)" another component, it can refer not only to embodiments in which the component is arranged adjacent to the top (or bottom) surface of the other component, but also to embodiments in which one or more components can be inserted between the other component and the components arranged on (or below) the other component. Conversely, if a component is referred to as "directly on" or "directly below" another component (e.g., when a component is referred to as "directly on" or "directly below" another component), there are no intermediate components in between.

[0042] When a component is described as being "connected" or "attached" to another component, it should be understood that these components are directly connected to each other or directly connectable to each other, but another component may be "inserted" between these components, or these components may be "connected" or "attached" to each other through another component. When one part is electrically connected to another part, this can include not only embodiments in which they are directly connected to each other, but also embodiments in which they are connected to another element between them.

[0043] Throughout this disclosure, unless otherwise specified, “A and / or B” or “A or B” or “A / B” may refer to A, B, or A and B. For example, “and / or” and “or” and “ / ” may include all or any combination of the listed items. Unless otherwise specified, “C to D” may refer to at least C but not more than D. Expressions such as “at least one of…”, “one of…” and “selected from…” modify the entire list of elements when following the list of elements, without modifying the individual elements in the list. For example, “at least one of a, b or c”, “at least one selected from a, b and c”, “at least one selected from a to c”, etc., may indicate only a, only b, only c, (e.g., simultaneously) both a and b, (e.g., simultaneously) both a and c, (e.g., simultaneously) both b and c, all of a, b and c, or variations thereof.

[0044] The terminology used herein is for the purpose of describing embodiments of this disclosure and is not intended to limit the disclosure.

[0045] In the following text, the first direction DR1 can be defined as the direction in which the electrode lead 20 is drawn from the pouch-type secondary battery 1, the second direction DR2 can be defined as the width direction of the pouch-type secondary battery 1, and the third direction DR3 can be defined as the thickness direction of the pouch-type secondary battery 1.

[0046] Figure 1 This is an exploded perspective view of a pouch-type (type) secondary battery according to one or more embodiments of the present disclosure. Figure 2 According to one or more embodiments of this disclosure Figure 1 A perspective view of a bag-type (type) secondary battery in a sealed state.

[0047] Reference Figure 1 and Figure 2 In a pouch-type (type) secondary battery 1 according to one or more embodiments of the present disclosure, the battery housing 100 can be easily bent by forming a bend 140 in the sealed battery housing 100.

[0048] According to one or more embodiments of the present disclosure, a pouch-type (type) secondary battery 1 can prevent the electrode leads 20 from breaking by specifying the bending position of the battery casing 100, and the protective member 150 attached for insulation can be predetermined (see Figure 5 and Figure 6 The curved shape of the protective component 150 improves the efficiency of the manufacturing process.

[0049] Reference Figure 1 A pouch-type (type) secondary battery 1 according to one or more embodiments of the present disclosure may include an electrode assembly 10, electrode leads 20, and a battery casing 100.

[0050] Electrode assembly 10 can be formed by winding or laminating a stack of multiple electrode plates and separators in a sheet or film shape (e.g., formed as a plate or film). If electrode assembly 10 is a wound stack (e.g., when electrode assembly 10 is a wound stack), the winding axis can be parallel to the longitudinal direction of battery housing 100. In one or more embodiments, electrode assembly 10 can be a stack type rather than a wound type, and the shape or number of electrode assemblies 10 is not limited in this disclosure.

[0051] The electrode assembly 10 may include electrodes. The electrodes may extend from each electrode plate of the electrode assembly 10 and may be used as negative or positive electrodes.

[0052] Electrode leads 20 can be electrically connected to electrodes extending in the electrode assembly 10. Electrode leads 20 can be electrically connected to the electrode assembly 10 while being exposed to the outside of the battery housing 100.

[0053] In one or more embodiments, electrode leads 20 may be arranged between the lower housing 110 and the upper housing 120 such that if the lower housing 110 and the upper housing 120 are connected to each other (e.g., when the lower housing 110 and the upper housing 120 are connected to each other), the electrode leads 20 may be electrically connected to the outside.

[0054] This allows the electrode assembly 10 to be electrically connected to external components via the electrode leads 20.

[0055] Reference Figure 1 The battery housing 100 can accommodate and seal the electrode assembly 10 therein, and may include a lower housing 110 and an upper housing 120.

[0056] Reference Figure 1 The lower housing 110 may include a receiving portion 111 and an edge portion 112 for accommodating the electrode assembly 10.

[0057] The receiving portion 111 may include a receiving space S in which the electrode assembly 10 is received. The receiving portion 111 may be formed to have a predetermined depth along its outer periphery L, such that the electrode assembly 10 having a set or predetermined thickness can be received in the receiving space S.

[0058] Reference Figure 1 The outer periphery L forming the boundary of the receiving portion 111 can be formed in the receiving portion 111. The outer periphery L of the receiving portion 111 can be defined by a first edge L1 on which the electrode lead 20 is arranged, and a second edge L2 forming a predetermined angle with the first edge L1.

[0059] The first edge L1 may be a portion of the outer periphery L of the receiving portion 111 located on one side in the direction in which the electrode lead 20 is drawn out. For example, the first edge L1 may be a portion of the outer periphery L of the receiving portion 111 located on one side in the first direction DR1. For example, the first edge L1 may extend in the outer periphery L of the receiving portion 111 in a direction intersecting the first direction DR1.

[0060] The second edge L2 may form a predetermined angle with the first edge L1 at its opposite end. In one or more embodiments, the second edge L2 may be formed to extend from the opposite end of the first edge L1 in a first direction DR1. For example, the second edge L2 may be a portion of the outer periphery L of the receiving portion 111 located on the opposite side in the second direction DR2. For example, the second edge L2 may extend in the outer periphery L of the receiving portion 111 in a direction intersecting the second direction DR2.

[0061] Edge portion 112 may be connected to receiving portion 111. In one or more embodiments, edge portion 112 may be formed to extend from the outer periphery of receiving portion 111. Edge portion 112 may extend from first edge L1 and second edge L2 and may be integrally formed (e.g., formed as a single body).

[0062] The edge portion 112 may have a set or predetermined width and may provide an area opposite to the upper housing 120 (e.g., facing the upper housing 120) for forming the sealing portion 130 as described in more detail later.

[0063] The upper housing 120 may have a receiving portion 111 that covers the lower housing 110 to spatially separate the receiving portion 111 from the outside, the region being opposite to the lower housing 110 (e.g., facing the lower housing 110).

[0064] The upper housing 120 can cover the lower housing 110, such that its designated or predetermined area can face the edge 112 of the lower housing 110.

[0065] The areas of the upper housing 120 and the lower housing 110 that face each other can be joined by means of heat fusion or the like. However, embodiments of this disclosure are not limited thereto, and one or more suitable methods for joining two surfaces that are opposite to each other (e.g., facing each other) can be used to join the upper housing 120 and the lower housing 110.

[0066] exist Figure 1 In the present invention, the receiving portion 111 is shown as being disposed in the lower housing 110, but the embodiments thereof are not limited thereto. In one or more embodiments, the receiving portion 111 may be disposed in each of the lower housing 110 and the upper housing 120 such that a receiving space (receiving space S) is formed by the lower housing 110 and the upper housing 120 facing each other.

[0067] Reference Figure 1 and Figure 2 The lower housing 110 and the upper housing 120 may face each other and be connected to form a sealing portion 130. In one or more embodiments, the sealing portion 130 may be formed by the edge portion 112 of the lower housing 110 and the upper housing 120 that are opposite to each other (e.g., facing each other).

[0068] Reference Figure 2 The sealing portion 130 may be provided along the outer periphery L of the receiving portion 111. The sealing portion 130 may be integrally formed by extending from the outer periphery L of the receiving portion 111. For example, the sealing portion 130 may cover (e.g. seal) the receiving portion 111 to make the receiving space S a closed space.

[0069] The sealing portion 130 can seal the receiving portion 111. The sealing portion 130 can seal the receiving space S by connecting the edge portion 112 of the lower housing 110 and the upper housing 120 via heat fusion or the like. Therefore, the electrolyte and electrode assembly 10 housed in the receiving space S can be spatially and fluidly separated from the outside.

[0070] Reference Figure 1 and Figure 2 Electrode lead 20 can be pulled out from one side of seal 130. Seal 130 can surround (e.g., enclose) electrode lead 20 to prevent any gaps. For example, seal 130 can remain sealed so that electrode lead 20 can be pulled out, but the receiving space S is not in communication with the outside.

[0071] Reference Figures 2 to 5 The sealing part 130 may include a platform part 131 and a wing part 132.

[0072] The platform portion 131 may extend from the first edge L1. In one or more embodiments, the platform portion 131 may extend from the first edge L1 and in a first direction DR1.

[0073] The electrode lead 20 can be pulled out from one side of the platform portion 131. The platform portion 131 can be configured to surround (e.g., enclose) the electrode lead 20 without any gaps.

[0074] The wing 132 can be connected to the platform portion 131 and can extend from the second edge L2. In one or more embodiments, the wing 132 can extend from the second edge L2 along a second direction DR2. The wing 132 may also have a portion extending along a first direction DR1 for connection to the platform portion 131.

[0075] A bend 140 having a depth (e.g., a set or predetermined depth) can be formed to extend within the sealing portion 130. At the location where the bend 140 is formed, the sealing portion 130 can have a reduced thickness. Therefore, the sealing portion 130 can be easily deformed at the bend 140.

[0076] The bend 140 may be formed to extend in the shape of a line. In one or more embodiments, the bend 140 may be formed to be the shape of a line having a set or predetermined depth, such that the sealing portion 130 may bend along the line formed by the bend 140.

[0077] Therefore, the position of the bend in the sealing part 130 can be determined by the bend in the bending part 140.

[0078] Reference Figure 2 In one or more embodiments, the bend 140 can be formed by arranging a plurality of grooves having a set or predetermined depth at a preset interval. For example, the bend 140 can be formed to minimize or reduce the impact on the seal 130, thereby preventing the seal 130 from breaking. Therefore, the stability of the seal 130 can be improved.

[0079] In one or more embodiments, the depth of the bend 140 (e.g., a predetermined depth) may be at least about 40 μm but not more than about 60 μm.

[0080] When the depth of the bend 140 is less than about 40 μm, the difference between the thickness of the sealing portion 130 at the location where the bend 140 is formed and the thickness of the sealing portion 130 at another location may be insufficient, making it difficult for deformation of the sealing portion 130 at the bend 140 to occur.

[0081] In some embodiments, if the depth of the bend 140 exceeds about 60 μm (e.g., when the depth of the bend 140 exceeds about 60 μm), the thickness of the seal 130 at the location where the bend 140 is formed may become too thin, resulting in cracking in the seal 130.

[0082] Therefore, if the depth of the bend 140 is maintained at about 40 μm or more and about 60 μm or less (e.g., when the depth of the bend 140 is maintained at about 40 μm or more and about 60 μm or less), the bend 140 can determine the bend position of the seal 130 while maintaining the stability of the seal 130.

[0083] In one or more embodiments, the bend 140 may be formed in the seal 130 by stamping. In one or more embodiments, the stability of the seal 130 may be maintained by minimizing or reducing the impact on the components forming the seal 130. However, the method of forming the bend 140 is not limited to stamping, and techniques that are typically used to locally reduce the thickness of the seal 130 may be applied.

[0084] Reference Figure 2 The bend 140 is shown to be formed in the lower housing 110, but the embodiments of this disclosure are not limited thereto. In one or more embodiments, the bend 140 may be formed in at least one of the lower housing 110 and the upper housing 120.

[0085] Figures 3 to 6 This illustrates the use of one or more embodiments according to this disclosure. Figure 2 A view of the process by which the shape of a pouch-type (type) secondary battery is partially deformed.

[0086] Reference Figure 2 and Figure 3 The curved portion 140 may include a first curved portion 141 and a second curved portion 142.

[0087] The first bend 141 may be formed to be spaced apart from and / or separated from the first edge L1 by a predetermined distance (e.g., spaced apart or separated). For example, the first bend 141 may determine the bending position of the sealing portion 130 such that the sealing portion 130 bends at a position spaced apart from and / or separated from the receiving portion 111 by a predetermined distance (e.g., spaced apart or separated).

[0088] The first curved portion 141 may be formed to extend in a direction parallel to the first edge L1. For example, the first curved portion 141 may be defined in a curved shape such that the sealing portion 130 is curved parallel to the receiving portion 111.

[0089] The second bend 142 may be formed to be spaced apart from and / or separated from the second edge L2 by a predetermined distance (e.g., spaced apart or separated). For example, the second bend 142 may determine the bending position of the sealing portion 130 such that the sealing portion 130 bends at a position spaced apart from and / or separated from the receiving portion 111 by a predetermined distance (e.g., spaced apart or separated).

[0090] The second curved portion 142 can be formed to extend in a direction parallel to the second edge L2. For example, the second curved portion 142 can be defined in a curved shape such that the sealing portion 130 bends parallel to the receiving portion 111.

[0091] Reference Figures 2 to 5 The notch 130a may be formed in the sealing portion 130.

[0092] The notch 130a can be formed on the side of the sealing portion 130 at a predetermined depth, thereby reducing the width of the sealing portion 130. In one or more embodiments, a pair of notches 130a can be formed opposite to each other (e.g., facing each other) on the sealing portion 130, such that the width of the sealing portion 130 can be reduced between the notches 130a.

[0093] In one or more embodiments, the notch 130a may be formed in a semi-circular shape, such that the width of the sealing portion 130 may be formed to be minimum at the center of the semi-circle.

[0094] For example, since the width of the sealing portion 130 decreases at the location where the notch 130a is formed, the sealing portion 130 can be easily bent at the location where the notch 130a is formed.

[0095] Therefore, the notch 130a can determine the position where the sealing part 130 is bent.

[0096] Reference Figures 2 to 5 According to one or more embodiments of the present disclosure, the battery housing 100 may have sides that are bent to more reliably seal the receiving space S and increase energy density.

[0097] In the following text, the first curved line BL1 can be defined as an imaginary line extending from the first curved portion 141, and the second curved line BL2 can be defined as an imaginary line extending from the second curved portion 142. For example, the first curved line BL1 can be defined as an imaginary line extending from the opposite end of the first curved portion 141, and the second curved line BL2 can be defined as an imaginary line extending from the opposite end of the second curved portion 142.

[0098] Reference Figure 3 The wing 132 can be bent toward the receiving portion 111. The wing 132 can be bent toward the receiving portion 111 to cover one side of the receiving portion 111 and seal the receiving space S.

[0099] In one or more embodiments, the wing 132 may be bent toward the receiving portion 111 at the second bend 142. For example, the wing 132 may be bent toward the receiving portion 111 with the second bend line BL2 as the axis.

[0100] Therefore, one side of the accommodating portion 111 in the second direction DR2 can be covered by the wing 132, and the path through which the accommodating space S can communicate with the outside can be blocked.

[0101] The position where the wing 132 is bent can be preset. For example, since the wing 132 is bent at the second bend 142, the position where the wing 132 is bent can be preset through the second bend 142. For example, the distance at which the wing 132 is bent and separated from and / or separated from the receiving portion 111 (e.g., spaced apart or separated) can be preset through the second bend 142.

[0102] Reference Figure 3 The platform portion 131 can be bent from the first curved portion 141 toward the receiving portion 111. The platform portion 131 can be bent toward the receiving portion 111 to cover one side of the receiving portion 111 and seal the receiving space S.

[0103] In one or more embodiments, the platform portion 131 may be bent toward the receiving portion 111 at the first bending portion 141. For example, the platform portion 131 may be bent toward the receiving portion 111 with the first bending line BL1 as the axis. Therefore, one side of the receiving portion 111 in the first direction DR1 may be covered by the platform portion 131, and the path through which the receiving space S can communicate with the outside may be blocked.

[0104] The position where the platform portion 131 is bent can be preset. For example, since the platform portion 131 is bent at the first bend 141, the position where the platform portion 131 is bent can be preset through the first bend 141. For example, the distance at which the platform portion 131 is bent and separated from and / or separated from the receiving portion 111 (e.g., spaced apart or separated) can be preset through the first bend 141.

[0105] Reference Figure 4 and Figure 5 The wing 132 may include a first side portion 132a and a second side portion 132b.

[0106] Reference Figure 4 and Figure 5 The first side portion 132a can be defined as the area where the wing portion 132 overlaps with the receiving portion 111 when the wing portion 132 bends toward the receiving portion 111.

[0107] The wing 132 can be bent toward the receiving portion 111 to form a first side portion 132a. In one or more embodiments, the wing 132 can be bent to cover one side of the receiving portion 111, thereby minimizing or reducing the space occupied by the pouch-type secondary battery 1 in the second direction DR2. Therefore, the energy density of the pouch-type secondary battery 1 can be increased.

[0108] In one or more embodiments, the wing 132 may be bent toward the receiving portion 111 at the second bend 142. The second bend 142 may induce the sealing portion 130 to be bent at a position spaced apart from and / or separated from (e.g., spaced apart or separated from) the second edge L2 by a predetermined distance, such that the first side portion 132a may be arranged at a position spaced apart from and / or separated from (e.g., spaced apart or separated from) the receiving portion 111 by a predetermined distance.

[0109] For example, the distance by which the first side portion 132a is spaced apart from and / or separated from the receiving portion 111 (e.g., spaced apart or separated) can be determined by the second curved portion 142. Thus, a gap can be ensured between the first side portion 132a and the receiving portion 111 to mount the protective member 150, which will be described in more detail later, on the first side portion 132a.

[0110] In one or more embodiments, the pouch-type secondary battery 1 having the wing 132 in a bent state may have a constant width. For example, the width of the pouch-type secondary battery 1 in the second direction DR2 may be constant.

[0111] Reference Figure 4 and Figure 5 The second side portion 132b can be defined as the side of the wing portion 132 that protrudes in the direction in which the electrode lead 20 is pulled out when the wing portion 132 and the platform portion 131 bend toward the receiving portion 111.

[0112] The second side portion 132b may be bent toward the receiving portion 111. In one or more embodiments, the second side portion 132b may be bent toward the receiving portion 111 covered by the platform portion 131 to cover the area of ​​the platform portion 131. Therefore, the second side portion 132b can prevent the platform portion 131 and the wing portion 132 bent toward the receiving portion 111 from unfolding again.

[0113] Reference Figure 4 and Figure 5 The second side portion 132b can be bent from the first curved portion 141 toward the receiving portion 111. For example, the second side portion 132b can be bent along the first curved line BL1, which is bent when the wing portion 132 bends along the second curved line BL2.

[0114] For example, the first bending portion 141 can induce the second side portion 132b to bend at a position spaced apart from and / or separated from the first edge L1 by a predetermined distance (e.g., spaced apart or separated), such that the second side portion 132b can be arranged at a position spaced apart from and / or separated from the receiving portion 111 by a predetermined distance (e.g., spaced apart or separated).

[0115] A notch 130a may be formed (e.g., positioned) in the second side portion 132b to allow the bending position to be determined. In one or more embodiments, the notch 130a may be formed at the end of the first bend 141 to reduce the width of the second side portion 132b, thereby making the second side portion 132b easier to bend.

[0116] The position where the second side portion 132b is bent can be determined by the first bent portion 141 and the notch portion 130a. When the first bent portion 141 and the notch portion 130a are formed to be spaced apart from and / or separated from the receiving portion 111 by a predetermined distance in the first direction DR1 (e.g., spaced apart or separated), the second side portion 132b can be bent (e.g., even when bent) without applying a load to the electrode lead 20, thereby improving the structural stability of the pouch-type secondary battery 1.

[0117] In one or more embodiments, the pouch-type secondary battery 1, with the platform portion 131 and the second side portion 132b bent, can have a constant height, such that the length of the pouch-type secondary battery 1 in the first direction DR1 can be formed to be constant.

[0118] Figure 7 It is according to one or more embodiments of this disclosure along Figure 6 A cross-sectional view taken from line I-I'. Figure 8 It is according to one or more embodiments of this disclosure along Figure 6 The cross-sectional view taken from line II-II'.

[0119] Reference Figures 5 to 8 The battery housing 100 according to one or more embodiments of the present disclosure may also include a protective member 150.

[0120] The protective member 150 can be installed on the edge of the wing 132 to separate the interior of the pouch-type secondary battery 1 from its exterior. The protective member 150 can cover the edge of the wing 132 to prevent the internal materials (such as electrolyte) of the pouch-type secondary battery 1 from contacting the exterior, thereby improving the airtightness and insulation of the pouch-type secondary battery 1.

[0121] An insertion groove can be formed in the protective member 150, and the edge of the wing 132 can be inserted into the insertion groove. The edge of the wing 132 can be inserted into the insertion groove of the protective member 150, so that the predetermined area can be covered by the protective member 150.

[0122] The protective member 150 can be configured in a curved shape. The protective member 150 can be configured in a curved shape on one side to allow the curved wing 132 to be inserted into the insertion slot of the protective member 150.

[0123] The protective member 150 can be bent at a position corresponding to the first bend 141. For example, the position where the protective member 150 is bent can be determined by the first bend 141.

[0124] In one or more embodiments, the protective member 150 may be bent at a position corresponding to the first bend 141 at the location where the wing 132 is bent, such that the insertion slot of the protective member 150 may have a shape corresponding to the edge of the wing 132.

[0125] Therefore, the protective member 150 can be installed on the wing 132 in a bent state at a position corresponding to the first bent portion 141, and can cover one side of the wing 132.

[0126] The protective member 150 may be formed of an insulating member such as rubber with a certain strength. In one or more embodiments, the protective member 150 may be integrally formed using an insulating member with a certain strength.

[0127] For example, the protective member 150 can be mounted on the wing 132 in a bent state at a position corresponding to the first bent portion 141 in order to maintain the bent shape of the wing 132.

[0128] Therefore, the curved structure of the battery casing 100 can be stably maintained, and the airtightness and insulation of the pouch-type secondary battery 1 can be improved.

[0129] Reference Figures 5 to 8 The protective member 150 may have a first isolator 151 and a second isolator 152.

[0130] The first spacer 151 may cover one side of the first side portion 132a. In one or more embodiments, the first spacer 151 may be formed to extend in the extending direction of the first side portion 132a and may include an insertion slot into which the first side portion 132a can be inserted.

[0131] The first separator 151 can be installed on the first side portion 132a to allow the edge of the first side portion 132a to be inserted into the insertion slot. Therefore, the edge of the first side portion 132a can be spatially separated from the outside by the first separator 151, thereby improving the insulation of the pouch-type secondary battery 1.

[0132] The length of the first spacer 151 can be substantially the same as the length of the first side portion 132a. When the lengths of the first spacer 151 and the first side portion 132a are formed to be substantially the same, if the first spacer 151 is mounted on the first side portion 132a (e.g., when the first spacer 151 is mounted on the first side portion 132a), it can cover the entire edge of the first side portion 132a.

[0133] The second spacer 152 may cover the second side portion 132b. In one or more embodiments, the second spacer 152 may include an insertion slot into which the second side portion 132b can be inserted, such that the second spacer 152, if mounted on the second side portion 132b (e.g., when mounted on the second side portion 132b), may cover one side of the second side portion 132b.

[0134] The second separator 152 can be installed on the second side portion 132b to allow the edge of the second side portion 132b to be inserted into the insertion slot. Therefore, the edge of the second side portion 132b can be spatially separated from the outside by the second separator 152, thereby improving the insulation of the pouch-type secondary battery 1.

[0135] The second spacer 152 may be connected to the first spacer 151. In one or more embodiments, the second spacer 152 may extend from the end of the first spacer 151. Thus, the first spacer 151 and the second spacer 152 may cover the first side 132a and the second side 132b without any gap between the first spacer 151 and the second spacer 152, thereby improving the insulation of the pouch-type secondary battery 1.

[0136] In the following, the construction, operating principle and effects of the battery housing 100 and the pouch-type (type) secondary battery 1 including therein according to one or more embodiments of the present disclosure will be described in more detail.

[0137] Reference Figure 1 The battery housing 100 may include a lower housing 110 and an upper housing 120.

[0138] The lower housing 110 may include a receiving portion 111 that can accommodate the electrode assembly 10, and the upper housing 120 may cover the receiving space S formed by the receiving portion 111 to separate the electrolyte and the electrode assembly 10 contained in the receiving space S from the external space.

[0139] Reference Figure 1 Electrode leads 20 can be attached to electrode assembly 10 and can be arranged between lower housing 110 and upper housing 120 to electrically connect electrode assembly 10 to the outside.

[0140] Reference Figure 1The outer periphery L forming the boundary of the receiving portion 111 can be formed in the receiving portion 111, and the outer periphery L of the receiving portion 111 can be defined by a first edge L1 and a second edge L2.

[0141] Reference Figure 2 The sealing portion 130 can be formed by connecting the edge portion 112 of the lower housing 110 to the upper housing 120 by means of heat fusion or the like while the edge portion 112 of the lower housing 110 and the upper housing 120 are facing each other (e.g., facing each other).

[0142] The sealing portion 130 may extend along the outer periphery L of the receiving portion 111 to seal the receiving portion 111.

[0143] The sealing portion 130 may include a platform portion 131 extending from a first edge L1 and a wing portion 132 connected to the platform portion 131 and extending from a second edge L2.

[0144] Reference Figures 2 to 6 A bend 140 with a preset depth can be formed in the sealing portion 130, so that the position where the sealing portion 130 is bent can be determined.

[0145] Reference Figure 2 and Figure 3 The curved portion 140 may include a first curved portion 141 formed at a predetermined distance from and / or separated (e.g., spaced apart or separated) from the first edge L1, and a second curved portion 142 formed at a predetermined distance from and / or separated (e.g., spaced apart or separated) from the second edge L2.

[0146] The platform portion 131 can be bent toward the receiving portion 111 at the first bending portion 141, and the wing portion 132 can be bent toward the receiving portion 111 at the second bending portion 142. For example, the first bending portion 141 and the second bending portion 142 can respectively determine the bending positions of the platform portion 131 and the wing portion 132.

[0147] For example, the first bending portion 141 can determine the bending position of the electrode lead 20 and the bending position of the second side portion 132b, thereby pre-setting the distance between each of the electrode lead 20 and the second side portion 132b and the receiving portion 111.

[0148] In one or more embodiments, the second curved portion 142 can predetermine the distance at which the first side portion 132a is separated from the receiving portion 111 by determining the position of the bend of the wing portion 132.

[0149] Therefore, the space between the receiving portion 111 and the wing portion 132 can be ensured to stably protect the electrode lead 20 and mount the protective member 150 on the wing portion 132.

[0150] A notch 130a can be formed in the sealing portion 130, so that the sealing portion 130 can be bent at the location where the notch 130a is formed.

[0151] In one or more embodiments, the notch 130a may be formed in the sealing portion 130 at the location where the second side portion 132b is formed. For example, if the platform portion 131 and the wing portion 132 are bent toward the receiving portion 111 to form the second side portion 132b (e.g., when the platform portion 131 and the wing portion 132 are bent toward the receiving portion 111 to form the second side portion 132b), the second side portion 132b may be bent at the location where the notch 130a is formed and therefore may be bent toward the receiving portion 111.

[0152] In one or more embodiments, the notch 130a may be formed at the opposite end of the first bend 141 to define the bend position of the platform portion 131 or the second side portion 132b together with the first bend 141.

[0153] Reference Figures 5 to 8 The battery housing 100 according to one or more embodiments of the present disclosure may also include a protective member 150.

[0154] The protective member 150 may be installed on the edge of the wing 132 to improve the airtightness and insulation of the pouch-type secondary battery 1, and may include a first separator 151 and a second separator 152.

[0155] The first spacer 151 can be installed on the first side portion 132a. The first side portion 132a can be inserted into an insertion slot formed in the first spacer 151, such that a predetermined area of ​​the first side portion 132a can be covered by the first spacer 151.

[0156] The second spacer 152 can be installed on the second side portion 132b. The second side portion 132b can be inserted into an insertion slot formed in the second spacer 152, such that a predetermined area of ​​the second side portion 132b can be covered by the second spacer 152.

[0157] Therefore, the airtightness of the first side portion 132a and the second side portion 132b can be improved. For example, the insulation of the pouch-type secondary battery 1 can be improved by improving the airtightness of the wing portion 132.

[0158] The first spacer 151 and the second spacer 152 can be integrally formed. In one or more embodiments, the protective member 150 can be formed in a shape in which the first spacer 151 and the second spacer 152 are connected at a predetermined angle using an insulating material with a certain strength.

[0159] Therefore, the protective member 150 can be installed on the wing 132 to support the curved structure of the wing 132, thereby improving the airtightness and insulation of the pouch-type secondary battery 1.

[0160] In the context of this disclosure, unless otherwise defined, the terms “use,” “using…” and “being used” may be considered synonymous with the terms “utilize,” “using…” and “being exploited,” respectively.

[0161] As used herein, the terms “substantially,” “about,” and similar terms are used as approximate terms rather than terms of degree and are intended to describe the inherent deviations in measured or calculated values ​​that would be recognized by one of ordinary skill in the art. As used herein, “about” or “about” also includes the stated value and means within an acceptable range of deviations from the stated value as determined by one of ordinary skill in the art, taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., limitations of the measurement system). For example, “about” may mean within one or more standard deviations, or within ±30%, ±20%, ±10%, or ±5% of the stated value.

[0162] Any numerical range described herein is intended to include all subranges with the same numerical precision contained within the stated range. For example, the range “1.0 to 10.0” is intended to include all subranges between (and including) the minimum value of 1.0 and the maximum value of 10.0, i.e., all subranges having a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as 2.4 to 7.6. Any maximum numerical limit described herein is intended to include all lower numerical limits contained therein, and any minimum numerical limit described in this specification is intended to include all higher numerical limits contained therein. Therefore, the applicant reserves the right to amend this specification (including the claims) to expressly describe any subranges contained within the range expressly described herein.

[0163] The battery manufacturing apparatus / system, battery management system (BMS) device, and / or any other related device or component according to embodiments of the present disclosure described herein can be implemented using any suitable hardware, firmware (e.g., application-specific integrated circuit), software, or a combination of software, firmware, and hardware. For example, various components of the device may be formed on a single integrated circuit (IC) chip or separate IC chips. Furthermore, various components of the device may be implemented on a flexible printed circuit film, tape-on-a-carrier package (TCP), printed circuit board (PCB), or formed on a substrate. Additionally, various components of the device may be processes or threads that execute computer program instructions within one or more computing devices and interact with other system components to perform the various functions described herein on one or more processors. The computer program instructions are stored in memory, which may be implemented in the computing device using standard memory devices such as, for example, random access memory (RAM). The computer program instructions may also be stored in other non-transitory computer-readable media such as CD-ROMs, flash drives, etc. Furthermore, those skilled in the art will recognize that, without departing from the scope of this disclosure, the functions of various computing devices may be combined or integrated into a single computing device, or the functions of a particular computing device may be distributed across one or more other computing devices.

[0164] In view of the entire contents of this disclosure, those skilled in the art will understand that each suitable feature of the various embodiments of this disclosure may be combined with each other in part or in whole, and may be technically interlocked and operated in various suitable ways, and each embodiment may be implemented independently of each other or in combination with each other in any suitable way, unless otherwise stated or implied.

[0165] The spirit of this disclosure should not be determined by limiting it to the described embodiments, and any scope that is equivalent to or modified from the claims falls within the scope of the spirit of this disclosure, not only of the appended claims.

[0166] Although this disclosure has been described with reference to exemplary embodiments and accompanying drawings, it is not limited thereto, and those skilled in the art can make one or more suitable modifications and changes within the technical spirit of this disclosure and the equivalents of the set forth claims.

[0167] Battery modules and battery packs including such battery modules according to one or more embodiments of the present disclosure can improve airtightness and protect each component of the secondary battery by utilizing the curved structure of the housing of the pouch-type secondary battery.

[0168] However, the effects that can be obtained through this disclosure are not limited to those described, and other technical effects not mentioned can be clearly understood by those skilled in the art from the description of this disclosure herein.

Claims

1. A battery casing, comprising: A receiving portion, accommodating an electrode assembly, wherein electrode leads are attached to the electrode assembly; and A sealing portion is provided along the outer periphery of the receiving portion to seal the receiving portion, and a side from which the electrode lead is drawn out is also provided. in, The outer periphery of the receiving portion is defined by a first edge on which the electrode leads are arranged and a second edge forming a predetermined angle with the first edge. A curved portion of a predetermined depth extends within the sealing portion, and The sealing portion bends from the curved portion toward the receiving portion.

2. The battery casing according to claim 1, wherein, The curved portion includes a first curved portion, which is spaced apart from the first edge by a predetermined distance and extends in a direction parallel to the first edge.

3. The battery casing according to claim 2, wherein, The sealing portion includes a platform portion extending from the first edge and a wing portion connected to the platform portion and extending from the second edge. The wing bends toward the receiving portion. The platform portion bends from the first curved portion toward the receiving portion, and The side of the wing that protrudes in the direction in which the electrode lead is pulled out bends from the first curved portion toward the receiving portion.

4. The battery casing according to claim 3, further comprising: A protective member having an insertion groove formed therein and covering a predetermined area of ​​the wing, the edge of the wing being inserted into the insertion groove.

5. The battery casing according to claim 4, wherein, The protective member has a shape that bends at a position corresponding to the first curved portion.

6. The battery casing according to claim 4, wherein, The wing includes a first side portion covering one side of the receiving portion and a second side portion covering one side of the platform portion, and The protective member includes a first barrier covering the first side and a second barrier covering the second side.

7. The battery casing according to claim 1, wherein, The curved portion includes a second curved portion, which is spaced apart from the second edge by a predetermined distance and extends in a direction parallel to the second edge.

8. The battery housing according to claim 1, wherein the sealing portion includes a recess at the opposite end of the curved portion.

9. The battery casing according to claim 1, further comprising: The upper and lower housings face each other and are connected to form the sealing portion. The curved portion is in at least one of the upper housing and the lower housing.

10. The battery casing according to claim 1, wherein, The curved portion includes a plurality of curved grooves arranged at a preset interval, the plurality of curved grooves having a predetermined depth.

11. The battery housing according to claim 1, wherein the set depth of the curved portion is at least 40 μm but not more than 60 μm.

12. A pouch-type secondary battery, comprising: Electrode assembly; Electrode leads attached to the electrode assembly; as well as A battery housing includes a receiving portion and a sealing portion. The receiving portion accommodates the electrode assembly on which the electrode leads are attached. The sealing portion is disposed along the outer periphery of the receiving portion, sealing the receiving portion, and has a side from which the electrode leads are withdrawn. in, The outer periphery of the receiving portion is defined by a first edge on which the electrode leads are arranged and a second edge forming a predetermined angle with the first edge. A curved portion of a predetermined depth extends within the sealing portion, and The sealing portion bends from the curved portion toward the receiving portion.

13. The pouch-type secondary battery according to claim 12, wherein, The curved portion includes a first curved portion, which is spaced apart from the first edge by a predetermined distance and extends in a direction parallel to the first edge.

14. The pouch-type secondary battery according to claim 13, wherein, The sealing part includes: The platform section extends from the first edge; and A wing, connected to the platform portion and extending from the second edge, and The wing bends toward the receiving portion. The platform portion bends from the first curved portion toward the receiving portion, and The side of the wing that protrudes in the direction in which the electrode lead is pulled out bends from the first curved portion toward the receiving portion.

15. The pouch-type secondary battery according to claim 14, further comprising: A protective member having an insertion groove formed therein and covering a predetermined area of ​​the wing, the edge of the wing being inserted into the insertion groove.

16. The pouch-type secondary battery according to claim 15, wherein the protective member has a shape that is bent at a position corresponding to the first bent portion.

17. The pouch-type secondary battery according to claim 15, wherein, The wing includes a first side portion covering one side of the receiving portion and a second side portion covering one side of the platform portion, and The protective member includes a first barrier covering the first side and a second barrier covering the second side.

18. The pouch-type secondary battery according to claim 12, wherein, The curved portion includes a second curved portion, which is spaced apart from the second edge by a predetermined distance and extends in a direction parallel to the second edge.

19. The pouch-type secondary battery according to claim 12, wherein, The sealing portion includes a recess at the opposite end of the curved portion.

20. The pouch-type secondary battery according to claim 12, wherein, The battery housing also includes an upper housing and a lower housing, which face each other and are connected to form the sealing portion, and The curved portion is in at least one of the upper housing and the lower housing.

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