Battery assembly and battery pack comprising the same

Abstract

The present invention provides a battery assembly comprising: a battery cell block including a plurality of battery cells; a frame including a bottom cover plate facing the bottom surface of the battery cell block, a first side cover plate facing a first side surface of the battery cell block and connected to one side of the bottom cover plate, and a second side cover plate facing a second side surface of the battery cell block and connected to the other side of the bottom cover plate; and a top cover plate facing the upper surface of the battery cell block and connected to the frame, wherein at least one of the top cover plate and the frame includes a plurality of vent holes configured to discharge gas, and each of the plurality of vent holes has a width of 0.01 mm or greater and less than 0.61 mm.

Description

[0001] This application claims the benefit of Korean Patent Application No. 10-2024-0001248, filed on January 4, 2024, the disclosure of which is incorporated herein by reference. Technical Field

[0002] This disclosure relates to battery components and battery packs including such battery components. Background Technology

[0003] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. They are widely used as a power source for various wireless devices, including mobile phones, laptops, and cordless vacuum cleaners. Recently, due to improved energy density and economies of scale, the manufacturing cost per unit capacity of secondary batteries has decreased significantly, and with the driving range of battery electric vehicles (BEVs) now comparable to that of gasoline-powered vehicles, the primary use of secondary batteries has shifted from mobile devices to transportation.

[0004] With the increasing use of secondary batteries in transportation, the demand for their safety is growing. In the event of a fire or other accident involving secondary batteries used in transportation, the driver's life may be endangered; therefore, research into technologies to improve the safety of secondary batteries is essential. Utility Model Content

[0005] Technical issues

[0006] The technical challenge of this disclosure is to provide a battery assembly capable of suppressing flame generation and a battery pack including the battery assembly.

[0007] Technical solution

[0008] To address the aforementioned problems, the present disclosure provides a battery assembly comprising: a cell block including a plurality of battery cells; a frame including a bottom cover plate facing a bottom surface of the cell block, a first side cover plate facing a first side surface of the cell block and connected to one side of the bottom cover plate, and a second side cover plate facing a second side surface of the cell block and connected to the other side of the bottom cover plate; and a top cover plate facing an upper surface of the cell block and connected to the frame, wherein at least one of the top cover plate and the frame includes a plurality of vent holes configured to discharge gas, and each of the plurality of vent holes has a width of 0.01 mm or greater and less than 0.61 mm.

[0009] In an exemplary embodiment, a plurality of battery cells are stacked in a first direction between a first side cover and a second side cover, and the top cover includes a plurality of vent holes.

[0010] In an exemplary embodiment, the top cover includes: a first main board including a plurality of holes; and a first mesh plate including a plurality of vent holes and connected to the first main board, wherein the plurality of vent holes are disposed in each region of the first mesh plate in a region overlapping with the plurality of holes in the first main board.

[0011] In an exemplary embodiment, the top cover includes a plurality of venting regions, wherein a plurality of venting holes are arranged at equal intervals in each of the plurality of venting regions.

[0012] In an exemplary embodiment, the number of multiple exhaust holes in each of the multiple exhaust zones is between 10 and 100.

[0013] In an exemplary embodiment, a plurality of battery cells are stacked in a first direction between a first side cover and a second side cover, and at least one of the first side cover and the second side cover includes a plurality of vent holes.

[0014] In an exemplary embodiment, at least one of the first side cover and the second side cover includes: a second main board including a plurality of holes; and a second mesh plate including a plurality of vent holes and connected to the second main board, wherein the plurality of vent holes are disposed in each region of the second mesh plate in a region overlapping with the plurality of holes in the second main board.

[0015] In an exemplary embodiment, the frame includes multiple exhaust regions, and multiple exhaust holes are arranged at equal intervals in each of the multiple exhaust regions.

[0016] In an exemplary embodiment, the bottom cover includes a plurality of vent holes.

[0017] In an exemplary embodiment, the frame has a monolithic structure.

[0018] In an exemplary embodiment, the top cover is welded to the upper edge of the first side cover and the upper edge of the second side cover, respectively.

[0019] To address the aforementioned problems, the present disclosure provides a battery pack comprising: a battery pack housing; a battery assembly housed within the battery pack housing; and a battery pack cover coupled to the battery pack housing to cover the battery assembly, wherein the battery assembly comprises: a cell block including a plurality of battery cells; a frame including a bottom cover plate facing a bottom surface of the cell block, a first side cover plate facing a first side surface of the cell block and connected to one side of the bottom cover plate, and a second side cover plate facing a second side surface of the cell block and connected to the other side of the bottom cover plate; and a top cover plate facing an upper surface of the cell block and coupled to the frame, wherein at least one of the top cover plate and the frame includes a plurality of vent holes configured to vent gases, and each of the plurality of vent holes has a width of 0.01 mm or greater and less than 0.61 mm.

[0020] In an exemplary embodiment, a plurality of battery cells are stacked in a first direction between a first side cover and a second side cover, and the top cover includes a plurality of vent holes.

[0021] In an exemplary embodiment, the top cover includes a plurality of exhaust regions, and a plurality of exhaust holes are arranged at equal intervals in each of the plurality of exhaust regions.

[0022] In an exemplary embodiment, the top cover includes: a first main board including a plurality of holes; and a first mesh plate including a plurality of vent holes and connected to the first main board, wherein in the first mesh plate, the plurality of vent holes are arranged at equal intervals in each region of the first mesh plate overlapping with the plurality of holes in the first main board.

[0023] Beneficial effects

[0024] According to an exemplary embodiment of this disclosure, by configuring the vent holes of the frame to have a size that blocks the emission of spark particles, spark particles generated by a short circuit between the positive and negative electrodes at the cell level can be prevented from escaping to the outside of the battery pack. Since the ignition source, one of the three elements of a flame, can be removed, the generation of a flame inside the battery pack can be suppressed.

[0025] The effects obtainable from the exemplary embodiments of this disclosure are not limited to those described above, and other effects not mentioned can be clearly derived and understood by those skilled in the art from the following description. In other words, those skilled in the art can also derive unintended effects from practicing the exemplary embodiments of this disclosure. Attached Figure Description

[0026] Figure 1 This is an exploded perspective view showing a battery assembly according to an exemplary embodiment of the present disclosure.

[0027] Figure 2 This is a perspective view illustrating a battery assembly according to an exemplary embodiment of the present disclosure.

[0028] Figure 3 This is a diagram illustrating a portion of a battery assembly according to an exemplary embodiment of the present disclosure.

[0029] Figure 4 It is along Figure 3 The cross-sectional view of the battery assembly is taken by line AA-AA'.

[0030] Figure 5 This is a cross-sectional view showing a portion of a battery assembly according to an exemplary embodiment of the present disclosure.

[0031] Figure 6 This is a perspective view showing the frame of a battery assembly according to an exemplary embodiment of the present disclosure.

[0032] Figure 7 This is a cross-sectional view showing a portion of a battery assembly according to an exemplary embodiment of the present disclosure.

[0033] Figure 8 This is a cross-sectional view showing a portion of a battery assembly according to an exemplary embodiment of the present disclosure.

[0034] Figure 9 This is a cross-sectional view showing a portion of a battery assembly according to an exemplary embodiment of the present disclosure.

[0035] Figure 10 This is a cross-sectional view showing a portion of a battery assembly according to an exemplary embodiment of the present disclosure.

[0036] Figure 11 This is a perspective view showing a battery pack according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0037] In the following, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It should be noted that the terms and words used in this specification and claims should not be interpreted in their ordinary or dictionary sense, but rather in a meaning and concept consistent with the technical concept of the present disclosure, based on the principle that the inventor may define the concepts of the terms as best suited to describe the disclosure.

[0038] Therefore, it should be understood that the embodiments described herein and the configurations shown in the accompanying drawings are merely the most preferred embodiments of this disclosure and not an exhaustive list of the technical concepts of this disclosure, and there may be various equivalents and modifications that can be substituted for them at the time of submission.

[0039] Furthermore, in describing this disclosure, detailed descriptions of relevant known configurations or features are omitted if it is believed that such detailed descriptions would obscure the essence of this disclosure.

[0040] Because embodiments of this disclosure are provided to explain this disclosure more fully to those skilled in the art, the shapes and dimensions of components in the drawings may be shown enlarged, omitted, or schematically for clarity. Therefore, the dimensions or proportions of each component do not necessarily indicate its actual size or proportion.

[0041] When used in this specification, the terms “approximately,” “about,” and “substantially” are understood to mean a range or approximation of a value or degree of inherent manufacturing and material tolerances.

[0042] (First Embodiment)

[0043] Figure 1 This is an exploded perspective view showing a battery assembly 10 according to an exemplary embodiment of the present disclosure. Figure 2 This is a perspective view showing a battery assembly 10 according to an exemplary embodiment of the present disclosure. Figure 3 This is a diagram illustrating a portion of a battery assembly 10 according to an exemplary embodiment of the present disclosure. Figure 4 It is along Figure 3 A cross-sectional view of the battery assembly 10 along line AA-AA'.

[0044] Reference Figures 1 to 4 The battery assembly 10 may include a cell block 110, a busbar frame 120, multiple busbars 130, a frame 200, and a top cover plate 300. Here, the battery assembly 10 may be a battery module composed of multiple secondary battery cells.

[0045] The battery cell block 110 may include multiple battery cells 111. Each battery cell 111 is a lithium-ion battery, which is the basic unit of a secondary battery. Each battery cell 111 may include an electrode assembly, an electrolyte, and a cell housing. The electrode assembly embedded in the cell housing may include a positive electrode, a negative electrode, and a separator inserted between the positive and negative electrodes. Depending on the configuration of the electrode assembly, the electrode assembly may be of the wound type or the stacked type. The wound type electrode assembly may include a wound structure comprising a positive electrode, a negative electrode, and a separator inserted between the positive and negative electrodes. The stacked type electrode assembly may include multiple positive electrodes, multiple negative electrodes, and multiple separators inserted between the multiple positive and multiple negative electrodes in sequence. The positive electrode may include a positive electrode current collector and a positive electrode active material. The negative electrode may include a negative electrode current collector and a negative electrode active material.

[0046] Multiple battery cells 111 can be connected in series and / or in parallel. For example, multiple battery cells 111 can be connected in series with each other. For example, multiple battery cells 111 can also be connected in parallel with each other. For example, when a group of two or more battery cells 111 connected in parallel is defined as a battery cell bank, a single battery cell bank consisting of two or more battery cells 111 connected in parallel and another battery cell bank consisting of two or more battery cells 111 connected in parallel can be connected in series.

[0047] Each battery cell 111 can correspond to a pouch cell, a cylindrical cell, or a prismatic cell. The electrode assembly of a pouch cell is housed in a pouch cell housing including an aluminum laminate. The electrode assembly of a cylindrical cell is housed in a cylindrical metal can. The electrode assembly of a prismatic cell is housed in a prismatic metal can.

[0048] In an exemplary embodiment, each battery cell 111 corresponds to a pouch cell, and multiple battery cells 111 within a single cell block 110 may be stacked in a first horizontal direction (e.g., the X direction). In an exemplary embodiment, each battery cell 111 may correspond to a pouch cell whose length in the first horizontal direction (e.g., the X direction) is shorter than its length in a second horizontal direction (e.g., the Y direction). Electrode leads 113 may be connected to the ends of each battery cell 111 in the second horizontal direction (e.g., the Y direction).

[0049] When viewed from a planar surface, the battery cell 110 may have a rectangular shape. In this case, the battery cell 110 may have an upper surface 116 and a bottom surface opposite each other in a vertical direction (e.g., the Z direction), a first side surface 117 and a second side surface 118 opposite each other in a first horizontal direction (e.g., the X direction), and a front surface and a rear surface opposite each other in a second horizontal direction (e.g., the Y direction). The upper surface 116 of the battery cell 110 may include the upper surfaces of a plurality of battery cells 111, and the bottom surface of the battery cell 110 may include the bottom surfaces of a plurality of battery cells 111. In this disclosure, the upper surface 116 of the battery cell 110 is referred to as the first surface, the first side surface 117 of the battery cell 110 is referred to as the second surface, the second side surface 118 of the battery cell 110 is referred to as the third surface, and the bottom surface of the battery cell 110 may be referred to as the fourth surface.

[0050] The busbar frame 120 can be connected to the end of the cell block 110 in a second horizontal direction (e.g., the Y direction). That is, the busbar frame 120 can be disposed on the front and / or rear surface of the cell block 110. The busbar frame 120 can support the electrode leads 113 of a plurality of busbars 130 and a plurality of battery cells 111. The busbar frame 120 may include slits through which the electrode leads 113 pass. The electrode leads 113 may include positive and negative leads disposed in each battery cell 111. The busbar frame 120 may include insulating material.

[0051] Multiple busbars 130 can be mounted on the busbar frame 120. Each busbar 130 can be connected to at least one of the electrode leads 113 of a plurality of battery cells 111. For example, each busbar 130 can be connected to at least one of the electrode leads 113 of a plurality of battery cells 111 by soldering. Each busbar 130 can be connected to the electrode leads 113 of different battery cells 111 belonging to the cell block 110, thereby serving as an inter-busbar for electrically connecting different battery cells 111. For example, each busbar 130 can serve as a terminal busbar for electrically connecting the battery assembly 10 to other external electrical devices.

[0052] The frame 200 may have a receiving space 290 for accommodating the battery cell block 110. The frame 200 may include a bottom surface facing the battery cell block 110. Figure 9 The frame 200 comprises a bottom cover 211 (119 in the original text), a first side cover 213 facing the first side surface 117 of the battery cell block 110, and a second side cover 215 facing the second side surface 118 of the battery cell block 110. The bottom cover 211 covers the bottom surface 119 of the battery cell block 110, the first side cover 213 covers the first side surface 117 of the battery cell block 110, and the second side cover 215 covers the second side surface 118 of the battery cell block 110. Multiple battery cells 111 can be stacked between the first side cover 213 and the second side cover 215 along a first horizontal direction (e.g., the X direction). The frame 200 may have a U-shaped cross-section. The first side cover 213 can be connected to one side of the bottom cover 211, and the second side cover 215 can be connected to the other side of the bottom cover 211.

[0053] In an exemplary embodiment, an adhesive layer for securing the battery cell 110 to the frame 200 may be provided between the battery cell 110 and the frame 200. The adhesive layer may include, for example, a thermal interface material (TIM) and / or a thermosetting resin. The adhesive layer may be interposed between the battery cell 110 and the bottom cover plate 211, between the battery cell 110 and the first side cover plate 213, and / or between the battery cell 110 and the second side cover plate 215.

[0054] The frame 200 can have a single-piece structure or a single integrated structure.

[0055] A top cover 300 can be attached to a frame 200 to face the upper surface of the battery cell 110. The top cover 300 can cover the upper surface 116 of the battery cell 110. The top cover 300 can have a flat plate shape extending in a first horizontal direction (e.g., the X direction) and a second horizontal direction (e.g., the Y direction). In an exemplary embodiment, the top cover 300 can be welded to the upper edges of a first side cover 213 and a second side cover 215, respectively. In an exemplary embodiment, a metal bonding layer can be inserted between the top cover 300 and the first side cover 213, and between the top cover 300 and the second side cover 215. The top cover 300 can close the battery cell 110 together with the frame 200.

[0056] The battery assembly 10 may include a plurality of vent holes 400 disposed on at least one of the frame 200 and the top cover 300 and configured to discharge gas. The plurality of vent holes 400 provide channels for discharging gas generated in the receiving space 290 of the frame 200 to the outside of the battery assembly 10. Each vent hole 400 may penetrate the frame 200 or the top cover 300. The receiving space 290 of the frame 200 may communicate with an external space (ES) outside the battery assembly 10 through the plurality of vent holes 400. The vent holes 400 may be circular, but are not limited thereto, and may have a polygonal shape such as a square. The plurality of vent holes 400 may be disposed on at least one of the top cover 300, the bottom cover 211, the first side cover 213, and the second side cover 215. In this disclosure, the vent 400 provided on the top cover plate 300 is referred to as the first vent, the vent 400 provided on the first side cover plate 213 is referred to as the second vent, the vent 400 provided on the second side cover plate 215 is referred to as the third vent, and the vent 400 provided on the bottom cover plate 211 can be referred to as the fourth vent.

[0057] In an exemplary embodiment, a plurality of vent holes 400 may be provided on the top cover plate 300. In this case, directional venting can be achieved, that is, high-temperature gas originating from the battery cell 110 is discharged in a unidirectional manner (e.g., upward) through the plurality of vent holes 400 of the top cover plate 300.

[0058] In an exemplary embodiment, the top cover 300 may include a plurality of spaced-apart exhaust regions 321, and each exhaust region 321 may have a plurality of exhaust holes 400 disposed therein. In an exemplary embodiment, the plurality of exhaust regions 321 may be arranged on the top cover 300 along a first horizontal direction (e.g., the X direction) and a second horizontal direction (e.g., the Y direction). In an exemplary embodiment, within each exhaust region 321, the plurality of exhaust holes 400 may be spaced apart at equal intervals. In an exemplary embodiment, the number of exhaust holes 400 disposed in each exhaust region 321 may be between 10 and 100.

[0059] The vent hole 400 can be formed in various ways. In one embodiment, the vent hole 400 can be manufactured by punching (creating holes, grooves or patterns) a corresponding portion of the top cover plate 300 with a press, forming a hole using laser etching, or forming a hole on a corresponding portion of the top cover plate 300 using a chemical etching method.

[0060] Typically, spark particles (SPs) generated at the battery level due to a short circuit between the positive and negative electrodes act as ignition sources leading to flames. Specifically, the battery pack ( Figure 11 The three elements of a flame are residual oxygen within the battery pack 50, exhaust gases generated by the evaporation of the electrolyte, and spark particles (SP) generated at the cell level due to a short circuit between the positive and negative electrodes. When these three elements come into contact within the battery pack 50, a flame is generated within the battery pack 50.

[0061] In an exemplary embodiment, the width W1 of the vent 400 can be less than 0.61 mm. Here, the width W1 of the vent 400 can refer to the maximum width or diameter of the vent 400. If the width W1 of the vent 400 is 0.61 mm or greater, spark particles (SP) generated at the cell level due to a short circuit between the positive and negative electrodes may escape into the external space (ES) outside the battery assembly 10, and the spark particles (SP) may come into contact with exhaust gases and residual gases within the battery pack 50, thereby posing a risk of fire within the battery pack 50. Therefore, by configuring the width W1 of the vent 400 to be less than 0.61 mm, it is possible to prevent spark particles (SP) generated at the battery level due to a short circuit between the positive and negative electrodes from escaping into the external space (ES) and to retain them within the receiving space 290 of the frame 200. When the escape of spark particles (SP) into the external space (ES) is blocked, contact between the spark particles (SP) and residual oxygen in the battery pack 50 is prevented, thereby suppressing the occurrence of flame inside the battery pack 50. When the width W1 of the vent 400 is 0.61 mm or greater, it is confirmed that a flame has occurred inside the battery pack 50, and when the width W1 of the vent 400 is less than 0.61 mm, it is confirmed that no flame has occurred inside the battery pack 50.

[0062] In an exemplary embodiment, the width W1 of the vent hole 400 can be 0.01 mm or greater. If the width W1 of the vent hole 400 is less than 0.01 mm, the gas discharge flow rate through the vent hole 400 is too small, making it difficult to achieve directional exhaust through multiple vent holes 400.

[0063] In an exemplary embodiment, the width W1 of the vent 400 may be approximately 0.01 mm or greater and less than approximately 0.61 mm. Alternatively, the width W1 of the vent 400 may be approximately 0.01 mm or greater and approximately 0.59 mm or less, approximately 0.01 mm or greater and approximately 0.57 mm or less, approximately 0.01 mm or greater and approximately 0.55 mm or less, approximately 0.01 mm or greater and approximately 0.53 mm or less, approximately 0.01 mm or greater and 0.51 mm or less, approximately 0.01 mm or greater and 0.49 mm or less, approximately 0.01 mm or greater and 0.47 mm or less, approximately 0.01 mm or greater and 0.45 mm or less, or approximately 0.01 mm or greater and 0.43 mm or less.

[0064] (Second Implementation)

[0065] Figure 5 This is a cross-sectional view showing a portion of a battery assembly according to an exemplary embodiment of the present disclosure. Referring to the description above... Figures 1 to 4 , will be with Figures 1 to 4 The differences in the battery module 10 described in the text will be the focus of the description. Figure 5 Battery assembly 10.

[0066] Reference Figure 5 The top cover 300A may include a top main board 311 and a top mesh board 313. The top main board 311 can be connected to the top mesh board 313. Figure 5 In this example, the top mesh plate 313 is illustrated as the inner surface of the upper surface 116 facing the battery cell block 110 and connected to the top main board 311, but the top mesh plate 313 can also be connected to the outer surface of the top main board 311.

[0067] The top mesh plate 313 may include a plurality of vent holes 400 having a width W1 for blocking the discharge of spark particles (SP), and the top main plate 311 may include a plurality of holes 341. The plurality of holes 341 of the top main plate 311 may define a plurality of venting regions. Each region of the top mesh plate 313 that overlaps with the plurality of holes 341 of the top main plate 311 may have a plurality of vent holes 400 arranged at equal intervals. For example, each region of the top mesh plate 313 that overlaps with the plurality of holes 341 of the top main plate 311 may have 10 to 100 vent holes 400 disposed therein.

[0068] (Third implementation)

[0069] Figure 6 This is a perspective view showing a frame 200A of a battery assembly according to an exemplary embodiment of the present disclosure. Figure 7 This is a cross-sectional view showing a portion of a battery assembly according to an exemplary embodiment of the present disclosure. Hereinafter, it will be referred to in conjunction with reference to... Figures 1 to 4 The differences in the described battery assembly 10 are the focus of the description. Figure 6 and Figure 7 Battery components.

[0070] Reference Figure 6 and Figure 7 In frame 200A, a plurality of vent holes 400 may be provided in at least one of the first side cover plate 213 and the second side cover plate 215 of frame 200A.

[0071] In an exemplary embodiment, the first side cover 213 may include a plurality of vent regions 223 spaced apart from each other, and each vent region 223 may have a plurality of vent holes 400 of width W1 for blocking the emission of spark particles (SP). In an exemplary embodiment, the plurality of vent regions 223 may be arranged relative to the first side cover 213 in a vertical direction (e.g., the Z direction) and a second horizontal direction (e.g., the Y direction). In an exemplary embodiment, in each vent region 223, the plurality of vent holes 400 may be spaced apart at equal intervals. In an exemplary embodiment, the number of vent holes 400 provided in each vent region 223 may be between 10 and 100.

[0072] In an exemplary embodiment, the second side cover 215 may include a plurality of vent regions 225 spaced apart from each other, and each vent region 225 may have a plurality of vent holes 400 of width W1 for blocking the emission of spark particles (SP). In an exemplary embodiment, the plurality of vent regions 225 may be arranged relative to the second side cover 215 in a vertical direction (e.g., the Z direction) and a second horizontal direction (e.g., the Y direction). In an exemplary embodiment, in each vent region 225, the plurality of vent holes 400 may be spaced apart at equal intervals. In an exemplary embodiment, the number of vent holes 400 provided in each vent region 225 may be between 10 and 100.

[0073] In the battery assembly, multiple vents 400 may be provided on both the frame 200A and the top cover 300, or may be provided only on the frame 200A.

[0074] (Fourth implementation)

[0075] Figure 8 This is a cross-sectional view showing a portion of a battery assembly according to an exemplary embodiment of the present disclosure. Hereinafter, it will be referred to in conjunction with reference to... Figures 6 to 7 The description focuses on the differences in battery components. Figure 8 Battery components.

[0076] Reference Figure 8 The first side cover 213A of frame 200B may include a first side main board 2131 and a first side mesh board 2133. The first side main board 2131 can be connected to the bottom cover 211 and can form an integral unit with the bottom cover 211. The first side main board 2131 can be connected to the first side mesh board 2133. Figure 8 In this example, although the first side mesh plate 2133 is illustrated as the inner surface of the first side surface 117 facing the battery cell 110 and connected to the first side main board 2131, the first side mesh plate 2133 can also be connected to the outer surface of the first side main board 2131.

[0077] The first side panel 2133 may include a plurality of vent holes 400 having a width W1 for blocking the emission of spark particles (SP), and the first side main board 2131 may include a plurality of holes 243. The plurality of holes 243 of the first side main board 2131 may define a plurality of venting regions. Each region of the first side panel 2133 that overlaps with the plurality of holes 243 of the first side main board 2131 may have a plurality of vent holes 400 arranged at equal intervals. For example, each region of the first side panel 2133 that overlaps with the plurality of holes 243 of the first side main board 2131 may have 10 to 100 vent holes 400 disposed therein.

[0078] The second side cover 215A of frame 200B may include a second side main board 2151 and a second side mesh board 2153. The second side main board 2151 can be connected to the bottom cover 211 and can form an integral unit with the bottom cover 211. The second side main board 2151 can be connected to the second side mesh board 2153. Figure 8 In this example, although the second side mesh 2153 is illustrated as the inner surface of the second side surface 118 facing the battery cell 110 and connected to the second side main board 2151, the second side mesh 2153 can also be connected to the outer surface of the second side main board 2151.

[0079] The second side panel 2153 may include a plurality of vent holes 400 having a width W1 for blocking the emission of spark particles (SP), and the second side main panel 2151 may include a plurality of holes 245. The plurality of holes 245 of the second side main panel 2151 may define a plurality of venting regions. Each region of the second side panel 2153 overlapping with the plurality of holes 245 of the second side main panel 2151 may have a plurality of vent holes 400 arranged at equal intervals. For example, each region of the second side panel 2153 overlapping with the plurality of holes 245 of the second side main panel 2151 may have 10 to 100 vent holes 400 disposed therein.

[0080] (Fifth Implementation)

[0081] Figure 9 This is a cross-sectional view showing a portion of a battery assembly according to an exemplary embodiment of the present disclosure. Hereinafter, it will be referred to in conjunction with reference to... Figures 1 to 4 The differences in the described battery assembly 10 are the focus of the description. Figure 9 Battery components.

[0082] Reference Figure 9In frame 200C, a plurality of vent holes 400 may be provided on bottom cover plate 211. In an exemplary embodiment, bottom cover plate 211 may include a plurality of vent regions 221 spaced apart from each other, and each vent region 221 may have a plurality of vent holes 400 of width W1 for blocking the emission of spark particles (SP). In an exemplary embodiment, the plurality of vent regions 221 may be arranged relative to bottom cover plate 211 in a first horizontal direction (e.g., X direction) and a second horizontal direction (e.g., Y direction). In an exemplary embodiment, in each vent region 221, the plurality of vent holes 400 may be spaced apart at equal intervals. In an exemplary embodiment, the number of vent holes 400 provided in each vent region 221 may be between 10 and 100.

[0083] (Sixth Implementation Method)

[0084] Figure 10 This is a cross-sectional view showing a portion of a battery assembly according to an exemplary embodiment of the present disclosure. Hereinafter, it will be referred to in conjunction with reference to... Figure 9 The description focuses on the differences in battery components. Figure 10 Battery components.

[0085] Reference Figure 10 The bottom cover plate 211A of frame 200D may include a bottom main plate 2111 and a bottom mesh plate 2113. The bottom main plate 2111 can be connected to the first side cover plate 213 and the second side cover plate 215 and can form an integral unit with them. The bottom main plate 2111 can be connected to the bottom mesh plate 2113. Figure 10 In this example, the bottom mesh plate 2113 is shown as the inner surface of the bottom surface 119 of the bottom motherboard 2111 facing the battery cell 110, but the bottom mesh plate 2113 can also be connected to the outer surface of the bottom motherboard 2111.

[0086] The base plate 2113 may include a plurality of vent holes 400 having a width W1 for blocking the discharge of spark particles (SP), and the base plate 2111 may include a plurality of holes 241. The plurality of holes 241 of the base plate 2111 may define a plurality of venting regions. Each region of the base plate 2113 overlapping with the plurality of holes 241 of the base plate 2111 may have a plurality of vent holes 400 arranged at equal intervals. For example, each region of the base plate 2113 overlapping with the plurality of holes 241 of the base plate 2111 may have 10 to 100 vent holes 400 disposed therein.

[0087] (Seventh Implementation)

[0088] Figure 11 This is a perspective view showing a battery pack 50 according to an exemplary embodiment of the present disclosure.

[0089] Combination Figures 1 to 4 For reference Figure 11 The battery pack 50 may include a battery pack housing 510, battery components 10 mounted within the battery pack housing 510, and a battery pack cover 520. The battery pack 50 may include one or more battery components 10 mounted within the battery pack housing 510. In an exemplary embodiment, the battery pack 50 may include a plurality of battery components 10 arranged along a first horizontal direction (e.g., the X direction) and / or a second horizontal direction (e.g., the Y direction). The battery pack housing 510 may provide a receiving space for accommodating the battery components 10. The battery pack housing 510 may include a base plate supporting the battery components 10 and sidewalls connected to the edges of the base plate. The battery pack cover 520 may be coupled to the battery pack housing 510 to cover the battery components 10 housed within the battery pack housing 510.

[0090] According to an exemplary embodiment of this disclosure, by configuring the vent 400 of the battery assembly 10 to have a size that blocks the emission of spark particles (SP), it is possible to prevent spark particles (SP) generated at the cell level due to a short circuit between the positive and negative electrodes from escaping to the outside of the battery assembly 10. Since the ignition source, one of the three elements of a flame, can be removed, flame generation within the battery pack 50 can be suppressed.

[0091] The present disclosure has been described in more detail above with reference to the accompanying drawings and embodiments. However, it should be understood that the configurations shown in the drawings or embodiments described herein are merely one embodiment of the present disclosure and do not represent all the technical concepts of the present disclosure, and various equivalents and modifications may be made to replace them at the time of submission of this disclosure.

Claims

1. A battery assembly, characterized in that, The battery assembly includes: A battery cell block, wherein the battery cell block comprises a plurality of battery cells; A frame, the frame including a bottom cover plate facing the bottom surface of the battery cell block, a first side cover plate facing a first side surface of the battery cell block and connected to one side of the bottom cover plate, and a second side cover plate facing a second side surface of the battery cell block and connected to the bottom cover plate on the opposite side of the bottom cover plate; and A top cover plate, facing the upper surface of the battery cell block and connected to the frame, and a metal bonding layer interposed between the top cover plate and the first side cover plate and between the top cover plate and the second side cover plate, wherein... At least one of the top cover and the frame includes a plurality of vent holes configured to discharge gas. The width of each of the plurality of vent holes is 0.01 mm or greater and less than 0.61 mm. The plurality of battery cells are stacked between the first side cover plate and the second side cover plate along a first direction, and the top cover plate includes the plurality of vent holes. The top cover plate includes: A first motherboard, the first motherboard including multiple holes; and A first mesh plate, the first mesh plate including the plurality of vent holes and connected to the first main board, and In the first mesh plate, the plurality of vent holes are disposed in each region of the first mesh plate where they overlap with the plurality of holes in the first main plate.

2. The battery assembly according to claim 1, characterized in that, The top cover includes multiple exhaust zones, and The plurality of exhaust ports are arranged at equal intervals in each of the plurality of exhaust regions.

3. The battery assembly according to claim 2, characterized in that, In each of the plurality of exhaust zones, the number of the plurality of exhaust holes is between 10 and 100.

4. The battery assembly according to claim 1, characterized in that, The plurality of battery cells are stacked between the first side cover plate and the second side cover plate along a first direction, and At least one of the first side cover and the second side cover includes the plurality of vent holes.

5. The battery assembly according to claim 4, characterized in that, At least one of the first side cover and the second side cover includes: A second motherboard, the second motherboard including multiple holes; and The second mesh plate includes the plurality of vent holes and is connected to the second main board. In the second mesh plate, the plurality of vent holes are disposed in each region of the second mesh plate where they overlap with the plurality of holes in the second main plate.

6. The battery assembly according to claim 5, characterized in that, The second motherboard is connected to the bottom cover plate and forms an integral unit with the bottom cover plate.

7. The battery assembly according to claim 1, characterized in that, The frame includes multiple exhaust zones, and The plurality of exhaust ports are arranged at equal intervals in each of the plurality of exhaust regions.

8. The battery assembly according to claim 1, characterized in that, The bottom cover plate includes the plurality of vent holes.

9. The battery assembly according to claim 1, characterized in that, The frame has a single-piece structure.

10. The battery assembly according to claim 1, characterized in that, The top cover plate is welded to the upper edge of the first side cover plate and the upper edge of the second side cover plate, respectively.

11. The battery assembly according to claim 1, characterized in that, Each of the plurality of vent holes penetrates the frame or the top cover.

12. The battery assembly according to claim 1, characterized in that, Each of the plurality of vent holes has a circular or square shape.

13. A battery pack, characterized in that, The battery pack includes: Battery pack casing; The battery assembly according to any one of claims 1 to 12, wherein the battery assembly is housed within the battery pack housing; and A battery pack cover, which is attached to the battery pack housing to cover the battery assembly.

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