Battery cell and battery module comprising a battery cell

Abstract

A battery cell according to an embodiment of the present application can include an electrode assembly, a pouch-type battery cell case including a receiving portion receiving the electrode assembly and a sealing portion formed on at least a portion of a periphery along a periphery of the receiving portion, a reinforcing member provided on the sealing portion to make the sealing portion adhere to the receiving portion, and a fixing member fixing the reinforcing member to the battery cell case.

Description

Technical Field

[0001] This invention relates to a battery cell and a battery module including the battery cell. Background Technology

[0002] Unlike primary batteries, secondary batteries can be charged and discharged, making them suitable for various applications such as digital cameras, mobile phones, laptops, and hybrid vehicles. Examples of secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-metal hydride batteries, and lithium-ion batteries.

[0003] Among these secondary batteries, a great deal of research has been conducted on lithium secondary batteries with high energy density and discharge voltage. In recent years, lithium secondary batteries have been manufactured as flexible pouch-type battery cells and used in modular form by connecting multiple battery cells.

[0004] On the other hand, the pouch-type battery cell includes a sealing portion that seals the pouch by heat-sealing along the edges.

[0005] However, when the internal pressure of the battery cell increases, there is a problem that the seals may peel off due to the pressure. Therefore, a battery cell that can prevent the seals from peeling off is needed. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] The purpose of this invention is to provide a battery cell capable of suppressing the peeling of the seal and a battery module including the battery cell.

[0008] (II) Technical Solution

[0009] A battery cell according to an embodiment of the present invention may include: an electrode assembly; a pouch-type battery cell housing including a receiving portion for accommodating the electrode assembly and a sealing portion formed on at least a portion of the periphery of the receiving portion; a reinforcing member disposed on the sealing portion to make the sealing portion fit tightly against the receiving portion; and a fixing member for fixing the reinforcing member to the battery cell housing.

[0010] In an embodiment of the present invention, the sealing portion can be folded at least once and then pressed tightly against the receiving portion.

[0011] In embodiments of the present invention, the reinforcing member may be formed in the shape of a flat rod.

[0012] In an embodiment of the present invention, the reinforcing member may include a pressing portion that contacts the sealing portion and a supporting portion that extends from the pressing portion and at least a portion thereof contacts the receiving portion.

[0013] In embodiments of the present invention, the support portion and the pressing portion may be disposed on different planes.

[0014] In embodiments of the present invention, the inner angle between the support portion and the pressing portion may be 180° or less.

[0015] In an embodiment of the present invention, the thickness of the support portion may be made to be thicker than the thickness of the pressing portion.

[0016] In an embodiment of the present invention, the cross-section of the reinforcing member in the width direction can be formed as an arc.

[0017] In embodiments of the present invention, the reinforcing member may be formed of a material with a resistivity of 500 Ω·m or higher.

[0018] In an embodiment of the present invention, the width of the reinforcing member may be smaller than the thickness of the receiving portion.

[0019] In embodiments of the present invention, the fixing member may include adhesive tape.

[0020] In embodiments of the invention, the fixing member may be attached in a manner that covers the entire reinforcing member.

[0021] In embodiments of the present invention, the fixing members may be configured such that a plurality of fixing members are spaced apart from each other.

[0022] Additionally, a battery module according to an embodiment of the present invention may include: the at least one battery cell; and a module housing therein housing at least one of the battery cells.

[0023] Additionally, a battery module according to an embodiment of the present invention may include: a battery cell stack having a plurality of battery cells stacked thereon; a reinforcing member coupled to one side of the battery cell stack to contact the sealing surface of the battery cells; and a fixing member for tightly attaching and fixing the reinforcing member to the battery cell stack, wherein the reinforcing member is coupled to at least two battery cells or the entire plurality of battery cells.

[0024] (III) Beneficial Effects

[0025] The battery cell according to embodiments of the present invention can stably fix the sealing portion, thus suppressing deformation of the sealing portion. Therefore, the reliability of the battery cell can be improved, and the electrical insulation between the battery cell and the external structure can be strengthened. Attached Figure Description

[0026] Figure 1 This is a schematic perspective view of a battery cell according to an embodiment of the present invention.

[0027] Figure 2 yes Figure 1 An exploded 3D diagram.

[0028] Figure 3 yes Figure 1 A partial sectional view of line I-I' in the middle.

[0029] Figure 4 This is a schematic perspective view of a battery cell according to another embodiment of the present invention.

[0030] Figure 5 This is a schematic perspective view of a battery module according to an embodiment of the present invention.

[0031] Figure 6 yes Figure 5 The image shows an exploded perspective view of the battery module.

[0032] Figure 7 yes Figure 5 A partial sectional view of line II-II′.

[0033] Figures 8 to 10 These are schematic cross-sectional views of a battery cell according to yet another embodiment of the present invention.

[0034] Figure 11 and 12 These are schematic cross-sectional views of a battery module according to yet another embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures

[0036] 7, 71: Reinforcing components; 8, 81: Fixing components

[0037] 10: Battery unit; 30: Module housing

[0038] 40: Second board 50: First board

[0039] 60: Side cover; 70: Insulating cover

[0040] 100: Battery Module Detailed Implementation

[0041] Before providing a detailed description of the invention, the terms or words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that inventors can appropriately define the concepts of terms in order to best interpret their invention, they should be interpreted as meanings and concepts consistent with the technical concept of the invention. Therefore, the configurations shown in the embodiments and drawings described in this specification are merely the most preferred embodiments of the invention and do not represent the entirety of the technical concept of the invention. It should be understood that equivalents and modifications capable of replacing these configurations may be present at the time of filing this application.

[0042] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same components are represented by the same reference numerals wherever possible in the drawings. Furthermore, detailed descriptions of well-known functions and configurations that may obscure the essence of the invention will be omitted. For the same reason, some components in the drawings are enlarged, omitted, or shown schematically, and the dimensions of each component do not perfectly reflect the actual dimensions.

[0043] Figure 1 This is a schematic perspective view of a battery cell according to an embodiment of the present invention. Figure 2 yes Figure 1 Decomposed 3D diagram, Figure 3 yes Figure 1 A partial sectional view of line I-I' in the middle.

[0044] Reference Figures 1 to 3 According to this embodiment, the battery cell 10 can be a pouch-type secondary battery and can have an electrode lead 15 protruding from the main body to the outside. The battery cell 10 can be a battery capable of being charged and discharged, specifically, it can be a lithium-ion (Li-ion) battery or a nickel-metal hydride (Ni-MH) battery.

[0045] The battery cell 10 can be configured such that the electrode assembly 19 is housed within the battery cell housing 11.

[0046] The electrode assembly 19 includes multiple electrode plates and electrode connectors, and is housed within the battery cell housing 11. Here, the electrode plates consist of positive and negative plates, and the electrode assembly can be configured such that the positive and negative plates are stacked with their wide surfaces facing each other and a separator between the positive and negative plates.

[0047] The positive and negative plates are formed by coating an active material slurry onto the current collector. Typically, the slurry is formed by stirring granular active materials, auxiliary conductors, binders, and plasticizers in the presence of a solvent.

[0048] Furthermore, in the electrode assembly 19, multiple positive plates and multiple negative plates are stacked vertically. At this time, each of the multiple positive plates and multiple negative plates is provided with an electrode connector, and plates of the same polarity can contact each other and be connected to the same electrode lead 15.

[0049] In this embodiment, the two electrode leads 15 can be configured to face opposite directions.

[0050] The battery cell housing 11 provides a sealed space to accommodate the electrode assembly 19 and the electrolyte 18. At this time, a portion of the electrode leads 15 of the electrode assembly 19 can be exposed to the outside of the battery cell housing 11.

[0051] The battery cell housing 11 is a pouch-type battery cell housing, which can be divided into a sealing part 202 and a receiving part 204.

[0052] The receiving portion 204 can be formed in the shape of a container to provide a rectangular internal space. The electrode assembly 19 and the electrolyte 18 are housed in the internal space of the receiving portion 204.

[0053] The sealing portion 202 can be formed as a flange extending outward from the receiving portion 204, which is formed in the shape of a container. Therefore, the sealing portion 202 can be provided on at least a portion of the periphery of the receiving portion 204.

[0054] The joint between the sealing parts 202 can be achieved by heat fusion welding, but is not limited to this method.

[0055] In addition, in this embodiment, the sealing part 202 can be divided into a first sealing part 2021 provided with electrode leads 15 and a second sealing part 2022 not provided with electrode leads 15.

[0056] In this embodiment, the battery cell housing 11 can be formed by molding an outer material. More specifically, after molding one or two receiving portions in an outer material, the battery cell housing 11 can be completed by folding the outer material to form a space (i.e., a receiving portion) for the receiving portions.

[0057] The outer casing material can be made of sheets of repeatedly stacked metal and resin layers, but is not limited to this.

[0058] In this embodiment, the receiving portion 204 can be formed in a rectangular shape. Furthermore, since the receiving portion 204 and the sealing portion 202 are formed by folding an outer casing material, the battery cell 10 in this embodiment does not need to form the sealing portion 202 on the surface of the folded outer casing material. Therefore, in this embodiment, the sealing portion 202 is only provided on three of the four sides forming the periphery of the receiving portion 204, on any one of the four sides forming the periphery of the receiving portion ( Figure 1 The bottom part of the middle section is not sealed.

[0059] In this embodiment, since the electrode leads 15 are arranged to face opposite directions, the two electrode leads 15 can be provided on the sealing portions 202 formed on different sides. Therefore, the sealing portion 202 in this embodiment can be divided into two first sealing portions 2021 provided with electrode leads 15 and a second sealing portion 2022 not provided with electrode leads 15.

[0060] In addition, in the battery cell 10 of this embodiment, in order to improve the engagement reliability of the sealing part 202 and minimize the volume occupied by the sealing part 202 in the module, the sealing part 202 can be configured to be folded at least once.

[0061] More specifically, the battery cell 10 according to this embodiment can be configured such that the second sealing portion 2022, in which only the electrode lead 15 is not provided, is folded twice.

[0062] The second sealing portion 2022 can be folded along a direction that reduces the area of ​​the battery cell. For example, in this embodiment, the bending lines C1 and C2, which serve as the folding lines of the second sealing portion 2022, are provided parallel to the periphery of the receiving portion 204, and the second sealing portion 2022 can be folded in such a way that at least a portion of the second sealing portion 2022 overlaps along the bending lines C1 and C2. Therefore, the second sealing portion 2022, which is folded at least once, can have the same width overall.

[0063] The second sealing part 2022 along Figure 1 The first bend line C1 and the second bend line C2 shown are folded twice at 180°, and then folded 90° along the first bend line C1 to fit snugly in the receiving portion 204. However, the invention is not limited to this and various modifications can be made as needed. For example, the second sealing portion 2202 is folded once at 180° to halve the width of the second sealing portion 2022, and then folded 90° along the first bend line C1.

[0064] The adhesive member 17 can be filled inside the folded second sealing portion 2022, so that the second sealing portion 2022 can be held in its folded shape by the adhesive member 17. The adhesive member 17 can be formed of an adhesive with high thermal conductivity. For example, the adhesive member 17 can be formed of epoxy resin or silicone resin, but is not limited thereto.

[0065] In addition, the battery cell 10 of this embodiment may include a reinforcing member 7 and a fixing member 8 to make the sealing part 202 fit tightly against and fix to the receiving part 204.

[0066] A reinforcing member 7 and a fixing member 8 can be provided to make the second sealing part 2022, which is not provided with electrode leads 15, fit tightly against and fix it to the receiving part 204 side.

[0067] The reinforcing member 7 can be formed of an insulating material with rigidity that can maintain its shape.

[0068] The reinforcing member 7 is attached to the side of the receiving portion 204 in the form of being stacked on the second sealing portion 2022. Therefore, the second sealing portion 2022 can be arranged parallel to the reinforcing member 7 and can be configured to contact the surface of the reinforcing member 7.

[0069] In this embodiment, the reinforcing member 7 can be formed in the shape of a flat rod. Furthermore, since the reinforcing member 7 is located on the side of the receiving portion 204 in this embodiment, interference may occur when stacking the battery cells 10 if the width of the reinforcing member 7 is greater than the thickness of the receiving portion 204.

[0070] Therefore, the width of the reinforcing member 7 can be made smaller than the thickness of the receiving portion 204. Furthermore, the length of the reinforcing member 7 can be made smaller than the length of the receiving portion 204. However, the present invention is not limited to this; the length of the reinforcing member 7 can be made larger than the length of the receiving portion 204 as needed.

[0071] The reinforcing member 7 can be formed of an insulating material such as resin. For example, the reinforcing member 7 of this embodiment can be formed of a material with a resistivity of 500 Ω·m or higher. In addition, the reinforcing member 7 can be formed of a rigid material that is not easily deformed by external forces.

[0072] The fixing member 8 is adhered along the outer surface of the reinforcing member 7 and the surface of the battery cell 10, so that the reinforcing member 7 is fixed in close contact with the battery cell 10.

[0073] The fixing member 8 may include, but is not limited to, adhesive tape. For example, after applying an adhesive solution along the outer surface of the reinforcing member 7 and the surface of the battery cell, a film or sheet may be attached thereto to serve as the fixing member 8. Alternatively, a clip-shaped fixing member 8 may also be included.

[0074] Similar to the reinforcing member 7, the fixing member 8 can be formed of insulating material.

[0075] Reference Figure 1 The fixing member 8 can be configured as a continuous single member and integrated into the battery cell in a manner that covers the entire reinforcing member 7. However, the construction of the present invention is not limited to this, and the fixing member can be configured in various forms.

[0076] Figure 4 This is a schematic perspective view of a battery cell according to another embodiment of the present invention, and shows an embodiment provided with a plurality of fixing members 8.

[0077] like Figure 4 As shown, the plurality of fixing members 8 can be configured to be spaced apart from each other by a predetermined distance to partially cover the reinforcing member 7. In this case, a portion of the reinforcing member 7 of the battery cell 10a can be exposed to the outside of the fixing members 8.

[0078] As described above, since the battery cell 10 in this embodiment is formed by molding an outer casing material, therefore based on Figure 1The sealing portion 202 is not formed on the lower surface of the battery cell 10. Therefore, in the battery cell 10 of this embodiment, the reinforcing member 7 and the fixing member 8 can be provided only on the upper surface where the second sealing portion 2022 is provided.

[0079] Therefore, when a sealing portion is also formed on the lower surface of the battery cell 10, the reinforcing member 7 and the fixing member 8 can also be provided on the lower surface of the battery cell 10.

[0080] The battery cell 10 constructed as described above according to this embodiment includes a reinforcing member 7 and a fixing member 8 to make the second sealing portion 2022 fit tightly against the receiving portion 204.

[0081] When the second sealing part 2022 is fixed to the receiving part 204 with an adhesive or the like, the manufacturing process is complicated and the manufacturing time is increased because a process of applying liquid adhesive between the second sealing part 2022 and the receiving part 204 and curing it is required.

[0082] However, when reinforcing member 7 and fixing member 8 are used as in this embodiment, the process is simple and manufacturing time can be shortened. Furthermore, since it eliminates the need for heat or ultraviolet curing equipment to cure the adhesive, it simplifies the manufacturing equipment.

[0083] Furthermore, since the second sealing portion 2022 is stably fixed to the receiving portion 204, deformation of the second sealing portion 2022 can be suppressed. Therefore, the reliability of the battery cell 10 can be improved, and the electrical insulation between the battery cell 10 and the external structure (e.g., module housing, etc.) can be strengthened.

[0084] Next, the battery module 100, which includes the aforementioned battery unit 10, will be described.

[0085] Figure 5 This is a schematic perspective view of a battery module according to an embodiment of the present invention. Figure 6 yes Figure 5 The exploded 3D view of the battery module shown. Figure 7 yes Figure 5 A partial sectional view of line II-II′.

[0086] Reference Figures 5 to 7 The battery module 100 of this embodiment may include a battery cell stack 1 on which a plurality of the above-mentioned battery cells 10 are stacked and a module housing 30.

[0087] The battery cell stack 1 can be formed by stacking battery cells 10 in the left-right (or horizontal) direction. However, it can also be configured to be stacked in the up-down direction as needed.

[0088] The module housing 30 defines the appearance of the battery module 100 and can be disposed outside the plurality of battery cells 10 to protect the battery cells 10 from the influence of the external environment. Simultaneously, the module housing 30 of this embodiment can also serve as a cooling component for the battery module.

[0089] The module housing 30 of this embodiment may include: a first plate 50 disposed on one side of the battery unit 10; a second plate 40 disposed on the other side of the battery unit 10; and a side cover 60 disposed on the side of the battery unit 10 on which electrode leads 15 are provided. The first plate 50 and the second plate 40 can be used as cooling components for the battery module 100.

[0090] The first plate 50 may include: a lower plate 52 disposed below the battery unit 10 to support the lower surface of the battery unit 10; and a side plate 58 supporting the side of the battery unit 10 where the receiving portion 204 is provided. However, the side plate 58 and the lower plate 52 may also be constructed as separate components as needed.

[0091] Side plates 58 can be formed by extending from both sides of the lower plate 52 and are provided on the side of the battery cells 10 stacked in the left-right direction to support the receiving portion 204 of the battery cells 10.

[0092] To securely support the battery cell 10, the side plate 58 may be configured to contact the receiving portion 204 of the battery cell 10. However, the invention is not limited thereto, and various modifications can be made as needed, for example, providing a heat dissipation member or a buffer member between the side plate 58 and the receiving portion 204.

[0093] The first plate 50 can be made of a material with high thermal conductivity, such as a metal. For example, the first plate 50 can be made of aluminum. However, the invention is not limited to this, and various materials can be used, even if they are not metals, as long as the material has similar strength and thermal conductivity.

[0094] The second plate 40 can be disposed on the upper part of the battery cell 10 and attached to the upper surface of the battery cell 10. In addition, the second plate 40 can be fastened to the upper end of the side plate 58 of the first plate 50. Therefore, when the second plate 40 is fastened to the first plate 50, the second plate 40 and the first plate 50 can have the shape of hollow tubular members.

[0095] Similar to the first plate 50, the second plate 40 can be made of a material with high thermal conductivity, such as a metal. For example, the second plate 40 can be made of aluminum. However, the invention is not limited to this, and various materials can be used, even if they are not metals, as long as the material has similar strength and thermal conductivity.

[0096] The first plate 50 and the second plate 40 can be joined by welding or other means. However, the invention is not limited to this and can be modified in various ways. For example, they can be joined by sliding or by using fixing members such as bolts or screws.

[0097] The heat transfer component 90 may be filled at least once between the battery cell 10 and the first plate 50 and between the battery cell 10 and the second plate 40. Figure 7 The illustration shows a case where the heat transfer member 90 is provided only at the lower part of the battery cell 10, but it is not limited to this; the heat transfer member 90 may also be provided at both the upper and lower parts of the battery cell 10.

[0098] The heat transfer member 90 transfers heat generated from the battery cell 10 to the module housing 30. For this purpose, the heat transfer member 90 is made of a material with high thermal conductivity. For example, the heat transfer member 90 can be formed from any of the following, but is not limited to: thermal grease, thermal adhesive, epoxy resin, and a heat dissipation pad.

[0099] The heat transfer component 90 can be disposed on the inner surface of the module housing 30 in the form of a pad, or it can be formed by coating the inner surface of the module housing 30 in a liquid or gel state. The heat transfer component 90 of this embodiment has high insulation properties, for example, it can be made of a material with a dielectric strength in the range of 10 to 30 kV / mm.

[0100] Therefore, in the battery module 100 according to this embodiment, even if the insulation in the battery cell 10 is partially damaged, the insulation between the battery cell 10 and the module housing 30 can be maintained by the heat transfer member 90 disposed around the battery cell 10.

[0101] On the other hand, as described above, the battery cell 10 of this embodiment includes a reinforcing member 7 and a fixing member 8 for fixing the second sealing portion 2022. Since both the reinforcing member 7 and the fixing member 8 are formed of electrically insulating material, the heat transfer member 90 can be omitted between the second sealing portion 2022 and the module housing 30, or a material with a dielectric strength lower than the above-described range can be used.

[0102] The side covers 60 are respectively attached to the two sides of the battery cell 10 where the electrode leads 15 are provided.

[0103] The side cover 60 is integrated with the first plate 50 and the second plate 40, thereby achieving the appearance of the battery module 100 together with the first plate 50 and the second plate 40.

[0104] The side cover 60 may be formed of an insulating material such as resin, and the side cover 60 may have a through hole 62 for exposing the connection terminal 72 of the insulating cover 70, which will be described later, to the outside.

[0105] The side cover 60 can be attached to the first plate 50 and the second plate 40 by means of fastening members such as screws or bolts. However, the invention is not limited thereto.

[0106] An insulating cover 70 may be disposed between the side cover 60 and the battery cell 10.

[0107] The insulating cover 70 can be attached to the surface of the battery cell 10 where the electrode leads 15 are provided.

[0108] Electrode leads 15 can pass through the insulating cover 70 to connect to each other on the outside of the insulating cover 70. For this purpose, as... Figure 6 As shown, multiple through holes 73 can be provided in the insulating cover 70, and electrode leads 15 are inserted and disposed in the multiple through holes 73.

[0109] The insulating cover 70 may be provided with a connection terminal 72 for connecting to the outside. Therefore, the battery cell 10 is electrically connected to the outside through the connection terminal 72. For this purpose, the electrode lead 15 can be inserted into the slit 86 of the busbar 86 provided in the insulating cover 70 to be electrically connected to the connection terminal 72.

[0110] The connection terminal 72 can be exposed to the outside through the through hole 62 formed in the side cover 60. Therefore, the through hole 62 of the side cover 60 is formed to have a size corresponding to the size and shape of the connection terminal 72.

[0111] Additionally, the insulating cover 70 may include a circuit board (e.g., a PCB) and multiple electronic components packaged on the circuit board, thereby enabling the function of sensing the voltage of the battery cell 10.

[0112] The battery module 100 constructed as described above according to this embodiment can be configured such that, since the battery cell includes a reinforcing member 7 and a fixing member 8, the module housing 30 directly contacts the fixing member 8. Therefore, the path for dissipating heat generated from the battery cell 10 can be shortened, and the contact area between the upper surface of the battery cell 10 and the module housing 30 can be maximized.

[0113] Therefore, the heat generated from the battery cell 10 can be easily dissipated to the second sealing part 2022, thereby providing a high heat dissipation effect.

[0114] Furthermore, the battery cell of the present invention is not limited to the above embodiments and can be modified in various ways.

[0115] Figures 8 to 10 These are schematic cross-sectional views of a battery cell according to yet another embodiment of the present invention, showing the corresponding... Figure 3 The cross section.

[0116] Figures 8 to 10 The battery cell shown is constructed similarly to the embodiment described above, except for the shape of the reinforcing member 7. Therefore, the construction of the reinforcing member 7, which differs from the previous one, will be described below.

[0117] Reference Figure 8 In this embodiment, the battery cell 10b can be formed into a shape in which the fixing member 8 is partially bent.

[0118] With the curved portion as the boundary, the reinforcing member 7 can be divided into a pressing portion 7a that contacts and presses the second sealing portion 2022 and a supporting portion 7b that contacts the receiving portion 204 side of the battery unit 10b.

[0119] The pressing part 7a and the supporting part 7b can be formed flatly and can be distinguished by bending at a predetermined angle. Therefore, the pressing part 7a and the supporting part 7b can be configured to be disposed on different planes. In this case, the interior angle θ between the pressing part 7a and the supporting part 7b can be formed to be 180° or less.

[0120] Since the pressing part 7a presses the second sealing part 2022, it can be arranged parallel to the second sealing part 2022.

[0121] The support portion 7b extends from the pressing portion 7a and is configured such that at least a portion of the support portion 7b contacts the receiving portion 204.

[0122] Therefore, when the reinforcing member 7 is combined with the battery cell housing 11, the pressing part 7a contacts the second sealing part 2022, and the supporting part 7b contacts the receiving part 204 to support the pressing part 7a. Thus, the shaking or movement of the reinforcing member 7 can be minimized during the manufacturing process.

[0123] The interior angle θ between the pressing part 7a and the supporting part 7b can be varied according to the thickness of the second sealing part 2022 and the thickness of the receiving part 204. For example, the interior angle θ can be defined as the angle at which the pressing part 7a contacts the surface of the second sealing part 2022 and the supporting part 7b contacts the receiving part 204.

[0124] Therefore, the interior angle θ can increase as the thickness of the receiving portion 204 increases or the thickness of the second sealing portion 2022 decreases.

[0125] On the other hand, in this embodiment, the width of the pressing part 7a and the width of the supporting part 7b are approximately the same. However, the present invention is not limited to this, and the widths of the pressing part 7a and the supporting part 7b may be configured to be different from each other as needed.

[0126] Reference Figure 9In the battery cell 10c of this embodiment, the inner and outer surfaces of the reinforcing member 7 can be formed as curved surfaces.

[0127] In this embodiment, the cross-section of the reinforcing member 7 in the width direction can be formed as an arc. Therefore, the inner and outer surfaces of the reinforcing member 7 can be formed as curved surfaces with a predetermined curvature, rather than flat surfaces.

[0128] In this embodiment, the case in which both the inner and outer surfaces of the reinforcing member 7 are formed as curved surfaces is exemplified. However, as needed, only one of the inner and outer surfaces of the reinforcing member 7 can be formed as a curved surface.

[0129] The curvature of the reinforcing member 7 can be varied according to the thickness of the second sealing portion 2022 and the thickness of the receiving portion 204. For example, the radius of curvature of the reinforcing member 7 can be limited to, for example, the radius of curvature of the reinforcing member 7. Figure 9 The range in which at least a portion of the reinforcing member 7 is in contact with the surface of the second sealing portion 2022 and at least a portion is in contact with the receiving portion 204.

[0130] Therefore, the radius of curvature can increase as the thickness of the receiving portion 204 increases or the thickness of the second sealing portion 2022 decreases.

[0131] Reference Figure 10 Similar to the above Figure 8 In this embodiment, the reinforcing member 7 can be divided into a pressing part 7a that contacts and presses the second sealing part 2022 and a supporting part 7b that contacts the receiving part 204 side of the battery cell.

[0132] The pressing part 7a and the supporting part 7b can be formed to have different thicknesses. Specifically, the thickness of the supporting part 7b can be made to be thicker than that of the pressing part 7a, and a step can be formed at the boundary between the pressing part 7a and the supporting part 7b.

[0133] The thickness of the support portion 7b can be formed to be a greater amount than the thickness of the pressing portion 7a and corresponding to the thickness of the second sealing portion 2022.

[0134] When the reinforcing member 7 is attached to the battery cell, the pressing portion 7a of the reinforcing member 7 contacts the surface of the second sealing portion 2022, and the supporting portion 7b contacts the surface of the receiving portion 204. At the same time, the outer surface of the reinforcing member 7 can be formed flat.

[0135] With the structure described above, both the pressing part 7a and the supporting part 7b of the reinforcing member 7 are in contact with the battery cell surface and are combined with the battery cell at the same time, so the reinforcing member 7 can be more stably combined with the battery cell.

[0136] Furthermore, in this embodiment, since the outer surface of the reinforcing member 7 is formed flat, it has the advantage that the battery cell is very easy to handle.

[0137] Figure 11 and Figure 12 These are schematic cross-sectional views of a battery module according to another embodiment of the present invention, showing the corresponding... Figure 7 The cross section.

[0138] Figure 11 and Figure 12 The battery module shown is constructed similarly to the embodiments described above, differing only in the combination structure of the reinforcing member and the battery cell.

[0139] Reference Figure 11 In this embodiment, the battery module is configured such that a reinforcing member 71 is attached to the battery cell stack 1. Additionally, a fixing member 81 is attached to the battery cell stack 1 and the reinforcing member 71 so that the reinforcing member 71 is tightly fitted and fixed to the battery cell stack 1.

[0140] Therefore, the second sealing portion 2022 of all battery cells 10 can be configured to be pressed by the reinforcing member 71 to contact the surface of the reinforcing member 71.

[0141] In this embodiment, only one reinforcing member 71 is provided. Therefore, the fixing member 81 that is attached to the reinforcing member 71 is not attached to each battery cell 10, but only to the battery cells 10 provided on both sides of the battery cell stack 1.

[0142] Additionally, refer to Figure 12 The battery cell stack 1 can be divided into multiple battery cell groups 1a. Each battery cell group 1a can be composed of multiple battery cells 10, and a reinforcing member 72 is attached to each battery cell group 1a.

[0143] Therefore, the battery cell 10 included in each battery cell group 1a can be configured such that the second sealing portion 2022 is pressed by a reinforcing member 71 to contact the surface of the reinforcing member 71.

[0144] As described above, in the battery cell module of this embodiment, a reinforcing member can be integrated with at least two battery cells or the entire battery cell stack. Therefore, the time required to integrate the battery cells and the reinforcing member can be reduced, thereby minimizing manufacturing time.

[0145] at the same time, Figure 11 and 12 The reinforcing members shown are examples of those... Figure 10 The reinforcing member shown is an example of a baseline extension. However, the construction of the present invention is not limited to this, and various modifications can be made, for example, extending the use. Figure 3 , Figure 8 and Figure 9 The reinforcing member is shown in the diagram. Furthermore, the reinforcing member can also be constructed to include different shapes, without repeating the same shape. The reinforcing member can undergo various deformations; for example, the reinforcing member can be constructed as... Figure 3 The shape of the reinforcing member and Figure 10 The shapes of the reinforcing components are alternately arranged.

[0146] Although embodiments of the present invention have been described in detail above, the scope of the invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and variations can be made without departing from the technical spirit of the invention as set forth in the claims. Furthermore, the various embodiments can be implemented in combination with each other.

Claims

1. A battery cell, comprising: Electrode assembly; A pouch-type battery cell housing includes a receiving portion for accommodating the electrode assembly and a sealing portion formed on at least a portion of the periphery of the receiving portion; A reinforcing member is provided on the sealing portion to ensure that the sealing portion fits tightly against the receiving portion; as well as A fixing component is used to secure the reinforcing component to the battery cell housing. At least a portion of the reinforcing member is disposed between the fixing member and the sealing portion. The fixing member is adhered along the outer surface of the reinforcing member and the surface of the receiving portion, so that the reinforcing member is tightly attached to the receiving portion side.

2. The battery cell according to claim 1, wherein, The sealing part is folded at least once and then pressed tightly against the receiving part.

3. The battery cell according to claim 1, wherein, The reinforcing member is formed in the shape of a flat rod.

4. The battery cell according to claim 1, wherein, The reinforcing member includes a pressing portion that contacts the sealing portion and a supporting portion that extends from the pressing portion and at least a portion thereof contacts the receiving portion.

5. The battery cell according to claim 4, wherein, The support portion and the pressing portion are arranged on different planes.

6. The battery cell according to claim 5, wherein, The inner angle between the support portion and the pressing portion is 180° or less.

7. The battery cell according to claim 4, wherein, The thickness of the support portion is made to be greater than the thickness of the pressing portion.

8. The battery cell according to claim 1, wherein, The cross-section of the reinforcing member in the width direction is formed in an arc shape.

9. The battery cell according to claim 1, wherein, The reinforcing member is formed of a material with a resistivity of 500 Ω·m or higher.

10. The battery cell according to claim 1, wherein, The width of the reinforcing member is smaller than the thickness of the receiving portion.

11. The battery cell according to claim 1, wherein, The fixing component includes adhesive tape.

12. The battery cell according to claim 11, wherein, The fixing member is attached in such a way that it covers the entire reinforcing member.

13. The battery cell according to claim 11, wherein, The fixing components are configured as multiple fixing components spaced apart from each other.

14. A battery module, comprising: At least one battery cell according to claim 1; as well as The module housing contains at least one of the battery cells.

15. A battery module, comprising: A battery cell stack, which contains multiple battery cells; A reinforcing member is attached to one side of the battery cell stack to contact the sealing surface of the battery cell; as well as A fixing member is attached along the outer surface of the reinforcing member and the surface of the battery cell, such that the reinforcing member is tightly attached to and fixed to the battery cell stack. A portion of the reinforcing member is disposed between the fixing member and the sealing portion. The reinforcing member is integrated into at least two battery cells or the entire plurality of battery cells.

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