Battery assembly and battery pack including same

Abstract

The technical concept of the present invention provides a battery assembly comprising: a cell block comprising a plurality of battery cells; and a frame covering at least one surface of the battery cell block, in which the frame includes a plurality of discharge holes configured to discharge gas, and each of the plurality of discharge holes has a width of 0.01 mm or more and less than 0.61 mm.

Description

Technical Field

[0001] This disclosure relates to a battery assembly and a battery pack including the battery assembly.

[0002] This application is based on and claims priority to Korean Patent Application No. 10-2023-0180316, filed with the Korean Intellectual Property Office on December 13, 2023, the disclosure of which is incorporated herein by reference in its entirety. Background Technology

[0003] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. They are widely used as power sources for various wireless devices, such as mobile phones, laptops, and cordless vacuum cleaners. Recent improvements in energy density and economies of scale have significantly reduced the manufacturing cost per unit capacity of secondary batteries, and the driving range of battery electric vehicles (BEVs) has increased to levels comparable to internal combustion engine vehicles. This has led to a shift in the primary application of secondary batteries from mobile devices to mobility, such as BEVs.

[0004] As secondary batteries are increasingly used in mobility applications, the need for enhanced safety of these batteries is growing. For example, accidents such as fires involving secondary batteries used in mobility vehicles could endanger the driver's life. Therefore, research into technologies to improve the safety of secondary batteries is essential. Summary of the Invention

[0005] Technical issues

[0006] The problem sought to be solved by the technical concept 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; and a frame covering at least one surface of the cell block. 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 more and less than 0.61 mm.

[0009] In one embodiment, the frame includes a top cover plate facing the top surface of the battery cell block, 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 a second side cover plate facing a second side surface of the battery cell block, and the top cover plate includes the plurality of discharge holes.

[0010] In one embodiment, the top cover plate includes: a first main board including a plurality of holes; and a first mesh plate including the plurality of discharge holes and connected to the first main board. In the first mesh plate, the plurality of discharge holes are arranged in each region of the first mesh plate that overlaps with the plurality of holes in the first main board.

[0011] In one embodiment, the frame includes a top cover plate facing the top surface of the battery cell block, 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 a second side cover plate facing a second side surface of the battery cell block, and the bottom cover plate includes the plurality of discharge holes.

[0012] In one embodiment, the frame includes: a top cover plate facing the top surface of the battery cell block; 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 a second side cover plate facing a second side surface of the battery cell block, wherein at least one of the first side cover plate and the second side cover plate includes the plurality of discharge holes.

[0013] In one 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 the plurality of discharge holes and connected to the second main board. In the second mesh plate, the plurality of discharge holes are arranged in each region of the second mesh plate that overlaps with the plurality of holes in the second main board.

[0014] In one embodiment, the frame includes a plurality of emission zones, and the plurality of emission holes are arranged at equal intervals in each of the plurality of emission zones.

[0015] In one embodiment, the number of the plurality of emission orifices in each of the plurality of emission zones is in the range of 10 to 100.

[0016] In one implementation, the frame has a monolithic structure.

[0017] In one embodiment, the frame includes: a top cover plate facing the top surface of the battery cell block; 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 a second side cover plate facing a second side surface of the battery cell block, wherein the plurality of battery cells are stacked between the first side cover plate and the second side cover plate along a first direction.

[0018] Furthermore, this 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. The battery assembly includes: a cell block comprising a plurality of battery cells; and a frame covering at least one surface of the cell block. 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 more and less than 0.61 mm.

[0019] In one embodiment, the frame includes a top cover plate facing the top surface of the battery cell block, 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 a second side cover plate facing a second side surface of the battery cell block. The top cover plate includes the plurality of discharge holes.

[0020] In one embodiment, the top cover includes a plurality of discharge zones, and a plurality of discharge holes are arranged at equal intervals in each of the plurality of discharge zones.

[0021] In one embodiment, the top cover plate includes a first main board and a first mesh plate. The first main board includes a plurality of holes, and the first mesh plate includes the plurality of discharge holes and is connected to the first main board. In the first mesh plate, the plurality of discharge holes are arranged at equal intervals in each region of the first mesh plate that overlaps with the plurality of holes in the first main board.

[0022] In one embodiment, the frame includes: a top cover plate facing the top surface of the battery cell block; 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 a second side cover plate facing a second side surface of the battery cell block. At least one of the first side cover plate and the second side cover plate includes the plurality of discharge holes.

[0023] Beneficial effects

[0024] In this implementation, discharge holes are formed within the frame of the battery cell block, and each discharge hole is sized to block the discharge of spark particles. As a result, spark particles generated at the cell level due to a short circuit between the cathode and anode can be prevented from escaping into the external space of the frame. This configuration eliminates an ignition source, one of the three elements of a flame / fire, thus suppressing flame generation within the battery pack.

[0025] The effects obtainable from the embodiments of this disclosure are not limited to those described above, and those skilled in the art to which the embodiments of this disclosure pertain will clearly derive and understand other effects not mentioned in the following description. In other words, those skilled in the art can also derive unintended effects from the implementation of the embodiments of this disclosure. Attached Figure Description

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

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

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

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

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

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

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

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

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

[0037] Figure 12 This is a schematic perspective view of a vehicle including a battery pack according to an embodiment of the present disclosure. Detailed Implementation

[0038] In the following, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Prior to this description, the terms and words used in this specification and claims should not be construed as limited to their ordinary or dictionary meanings. Rather, they should be interpreted in a manner consistent with the technical spirit of the present disclosure, based on the inventor's appropriate definition of the terms as needed to best explain the principles of his or her invention.

[0039] Therefore, the embodiments described in this specification and the configurations shown in the accompanying drawings are merely some embodiments of this disclosure and do not represent all the technical concepts of this disclosure. Therefore, it should be understood that various equivalents and modifications that can replace these embodiments may exist at the time of filing this application.

[0040] In describing this disclosure, detailed explanations of relevant known functions and configurations will be omitted where such detailed explanations might obscure the essential points of this disclosure.

[0041] The embodiments of this disclosure are provided to provide a more complete explanation to those skilled in the art. Therefore, for clarity, the shapes, dimensions, and other aspects of the components shown in the accompanying drawings may be exaggerated, omitted, or illustrated schematically. Consequently, the dimensions or proportions of the components may not fully reflect their actual dimensions or proportions.

[0042] As used in this specification, taking into account inherent manufacturing and material tolerances, the terms “about,” “approximately,” and “substantially” are understood to refer to a range or approximation of a numerical or degree of value.

[0043] (First Implementation)

[0044] Figure 1 This is an exploded perspective view showing a battery assembly 10 according to an embodiment of the present disclosure. Figure 2 This is a perspective view showing a battery assembly 10 according to an embodiment of the present disclosure. Figure 3 This is a view showing a portion of a battery assembly 10 according to an embodiment of the present disclosure. Figure 4 It is along Figure 3 The cross-sectional view of battery assembly 10 taken by line AA-AA' in the figure.

[0045] Reference Figures 1 to 4 The battery assembly 10 may include a cell block 110, a busbar frame 120, multiple busbars 130, and a frame 200. Here, the battery assembly 10 may be a battery module including multiple secondary battery cells.

[0046] The battery cell block 110 may include a plurality of battery cells 111. In an embodiment, each individual battery cell 111 is a basic unit of a lithium-ion battery (e.g., a secondary battery). Each of the battery cells 111 may include an electrode assembly, an electrolyte, and a cell housing. The electrode assembly built into the cell housing may include a cathode, an anode, and a separator inserted between the cathode and the anode. Depending on the assembly form, the electrode assembly may be of the wound type or the stacked type. The wound type electrode assembly may include a wound structure of a cathode, an anode, and a separator inserted between the cathode and the anode. The stacked type electrode assembly may include a plurality of cathodes, a plurality of anodes, and a plurality of separators inserted therebetween, stacked sequentially. The cathode may include a cathode current collector and a cathode active material. The anode may include an anode current collector and an anode active material.

[0047] 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 with each other is defined as a group, a group including two or more battery cells 111 connected in parallel with each other and another group including two or more battery cells 111 connected in parallel with each other can be connected in series.

[0048] 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 constructed into a pouch cell housing including an aluminum laminate. The electrode assembly of a cylindrical cell is constructed into a cylindrical metal can. The electrode assembly of a prismatic cell is constructed into a prismatic metal can.

[0049] In one embodiment, each of the battery cells 111 corresponds to a pouch cell, and multiple battery cells 111 may be stacked on top of each other within a single cell block 110 along a first horizontal direction (e.g., the X-axis direction). In another embodiment, each of the battery cells 111 may correspond to a pouch cell whose length along the first horizontal direction (e.g., the X-axis direction) is less than its length along a second horizontal direction (e.g., the Y-axis direction). Electrode leads 113 may be connected to the end of each of the battery cells 111 along the second horizontal direction (e.g., the Y-axis direction).

[0050] When viewed in a plan view, the battery cell block 110 may have a rectangular shape. In this case, the battery cell block 110 may have a top surface 116 and a bottom surface 115 that are opposite each other in a vertical direction (e.g., in the Z-axis direction), a first side surface 117 and a second side surface 118 that are opposite each other in a first horizontal direction (e.g., in the X-axis direction), and a front surface 112 and a rear surface 114 that are opposite each other in a second horizontal direction (e.g., in the Y-axis direction). The top surface 116 of the battery cell block 110 may include the top surfaces of a plurality of battery cells 111, and the bottom surface 115 of the battery cell block 110 may include the bottom surfaces of a plurality of battery cells 111. In this disclosure, the top surface 116 of the battery cell block 110 may be referred to as the first surface, the first side surface 117 of the battery cell block 110 may be referred to as the second surface, the second side surface 118 of the battery cell block 110 may be referred to as the third surface, and the bottom surface 115 of the battery cell block 110 may be referred to as the fourth surface.

[0051] The busbar frame 120 can be connected to the end of the cell block 110 along a second horizontal direction (e.g., the Y-axis direction). That is, the busbar frame 120 can be placed on the front surface 112 and / or the rear surface 114 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 cathode leads and anode leads disposed in the respective battery cells 111. The busbar frame 120 may include insulating material.

[0052] Multiple busbars 130 may be mounted on the busbar frame 120. Each of the busbars 130 may be connected to at least one of the electrode leads 113 of a plurality of battery cells 111. For example, each of the busbars 130 may be soldered to at least one of the electrode leads 113 of a plurality of battery cells 111. Each of the busbars 130 may be an inter-busbar that electrically connects different battery cells 111 by connecting to the electrode leads 113 of different battery cells 111 belonging to the cell block 110. For example, each of the busbars 130 may be a terminal busbar that electrically connects the battery assembly 10 to external electrical equipment.

[0053] The frame 200 of the battery assembly 10 disclosed herein is configured to at least partially cover at least one of the surfaces of the battery cell 110. For example, the frame 200 may be configured to at least partially cover at least one of the top surface 116, the first side surface 117, the second side surface 118, and the bottom surface 115 of the battery cell 110, and may have a receiving space 290 for accommodating the battery cell 110. In an embodiment, the frame 200 may include a hollow space extending in a second horizontal direction (e.g., the Y-axis direction), and the hollow space may be configured as the receiving space 290 for accommodating the battery cell 110. The frame 200 may include a top cover plate 211 facing the top surface 116 of the battery cell 110, a first side cover plate 213 facing the first side surface 117 of the battery cell 110, a second side cover plate 215 facing the second side surface 118 of the battery cell 110, and a bottom cover plate 217 facing the bottom surface 115 of the battery cell 110. A top cover 211 may cover the top surface 116 of the battery cell block 110, a first side cover 213 may cover the first side surface 117 of the battery cell block 110, a second side cover 215 may cover the second side surface 118 of the battery cell block 110, and a bottom cover 217 may cover the bottom surface 115 of the battery cell block 110. Multiple battery cells 111 may be stacked between the first side cover 213 and the second side cover 215 along a first horizontal direction (e.g., along the X-axis). According to an embodiment, the frame 200 may have a rectangular tube shape. The first side cover 213 may be connected to one side of the top cover 211 and one side of the bottom cover 217, and the second side cover 215 may be connected to the other side of the top cover 211 and the other side of the bottom cover 217. According to an embodiment, multiple discharge regions 221 are formed in the top cover 211 of the frame 200, and multiple discharge holes 231 are arranged in each discharge region 221.

[0054] In one embodiment, an adhesive layer may be inserted between the battery cell 110 and the frame 200 to secure the battery cell 110 to 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 inserted between the battery cell 110 and the top cover plate 211, between the battery cell 110 and the first side cover plate 213, between the battery cell 110 and the second side cover plate 215, and / or between the battery cell 110 and the bottom cover plate 217.

[0055] The frame 200 can have a monolithic structure or a single integrated structure.

[0056] According to an embodiment, the frame 200 of the battery assembly 10 of this disclosure may include a plurality of discharge holes 231, which are formed to discharge gases generated, for example, from the battery cell block 110. Each of the discharge holes 231 may be formed, for example, by penetrating a top cover plate 211 of the frame 200 along the Z-axis direction. A receiving space 290 in the frame 200 may be connected to an external space ES outside the frame 200 through the plurality of discharge holes 231. The discharge holes 231 may be circular, but are not limited thereto, and may have a polygonal shape, such as a square. For example, Figure 1 A plurality of discharge holes 231 are shown formed in the top cover plate 211, but the present disclosure is not limited thereto. The plurality of discharge holes 231 may be arranged in at least one of, for example, the first side cover plate 213, the second side cover plate 215, and the bottom cover plate 217.

[0057] In one embodiment, when multiple discharge holes 231 are provided in the top cover plate 211 of the frame 200, directional discharge can be implemented, wherein high-temperature gas originating from the battery cell 110 is discharged in one direction (e.g., upward) through the multiple discharge holes 231 formed in the top cover plate 211.

[0058] In one embodiment, a plurality of spaced-apart discharge zones 221 may be formed in a top cover plate 211, and a plurality of discharge holes 231 may be formed in each discharge zone 221. In another embodiment, the plurality of discharge zones 221 may be arranged on the top cover plate 211 of the frame 200 along a first horizontal direction (e.g., along the X-axis) and a second horizontal direction (e.g., along the Y-axis). In another embodiment, in each of the discharge zones 221, the plurality of discharge holes 231 may be spaced apart from each other at equal intervals, and the number of discharge holes 231 provided in each discharge zone 221 may be in the range of 10 to 100.

[0059] Reference Figure 4 The spark particles SP generated at the cell level due to the short circuit between the cathode and anode of each battery cell 111 in the cell block 110 become the ignition source for the flame. For example, a battery pack in which multiple cell blocks 110 are arranged ( Figure 11 The residual oxygen in the battery pack 50, the exhaust gases produced by the evaporation of the electrolyte, and the spark particles SP generated at the cell level due to the short circuit between the cathode and anode of the battery cell 111 constitute the three elements of a flame. When the three elements of a flame meet in the battery pack 50, a flame may be generated in the battery pack 50.

[0060] Reference Figure 4The vent hole 231 can be manufactured in various ways. According to embodiments, the vent hole 231 can be manufactured by creating perforations (e.g., holes, grooves, or decorative patterns) in a corresponding portion of the top cover plate 211 using a press, or by forming holes in a corresponding portion of the top cover plate 211 by, for example, laser etching or chemical etching. In embodiments, the width W1 of the vent hole 231 can be less than about 0.61 mm. Here, the width W1 of the vent hole 231 can refer to the maximum width or diameter of the vent hole 231. When the width W1 of the vent hole 231 is greater than about 0.61 mm, spark particles SP generated at the cell level due to a short circuit between the cathode and anode of the battery cell 111 may escape into the external space ES of the frame 200, and the spark particles SP may encounter exhaust gases and residual gases within the battery pack 50, generating a flame within the battery pack 50. Therefore, when the width W1 of the vent hole 231 is configured to be less than about 0.61 mm or less than 0.43 mm, spark particles SP generated at the cell level due to a short circuit between the cathode and anode of the battery cell 111 can be prevented from escaping into the external space ES of the frame 200, and the spark particles SP can be allowed to remain in the receiving space 290 within the frame 200. In this way, when the spark particles SP are prevented from escaping into the external space ES of the frame 200, the spark particles SP can be prevented from encountering residual oxygen in the battery pack 50, thereby suppressing the generation of flames within the battery pack 50. It has been confirmed that when the width W1 of the vent hole 231 is greater than about 0.61 mm, flames are generated within the battery pack 50, and it has been confirmed that when the width W1 of the vent hole 231 is less than about 0.61 mm or less than about 0.43 mm, flames are not generated within the battery pack 50.

[0061] In this embodiment, the width W1 of the discharge hole 231 can be about 0.01 mm or more. When the width W1 of the discharge hole 231 is less than about 0.01 mm, the exhaust flow velocity through the discharge hole 231 is too low, making it difficult to achieve directional discharge through multiple discharge holes 231.

[0062] In one embodiment, the width W1 of the discharge hole 231 may be more than about 0.01 mm and less than about 0.61 mm. Alternatively, the width W1 of the discharge hole 231 may be more than about 0.01 mm and less than 0.59 mm, more than 0.01 mm and less than 0.57 mm, more than 0.01 mm and less than 0.55 mm, more than 0.01 mm and less than 0.53 mm, more than 0.01 mm and less than 0.51 mm, more than 0.01 mm and less than 0.49 mm, more than 0.01 mm and less than 0.47 mm, more than 0.01 mm and less than 0.45 mm, or may be more than about 0.01 mm and less than 0.43 mm.

[0063] (Second Implementation)

[0064] Figure 5 This is a cross-sectional view showing a portion of a battery assembly 10 according to an embodiment of the present disclosure. Hereinafter, it will be described... Figure 5 The battery components are concentrated in the reference Figures 1 to 4 The differences described in the battery assembly 10.

[0065] Reference Figure 5 The top cover 211A of the frame 200A of the battery assembly 10 may include a top main board 2111 and a top mesh board 2113. The top main board 2111 may be connected to or integrated with the first side cover 213 and the second side cover 215. The top main board 2111 may be connected to the top mesh board 2113. Figure 5 The top mesh 2113 is shown attached to the inner surface of the top surface 116 of the top main board 2111 facing the battery cell 110, but the top mesh 2113 can also be attached to the outer surface of the top main board 2111.

[0066] The top mesh plate 2113 of frame 200A has a plurality of discharge holes 231 formed therein, each having a width W1, for blocking the discharge of spark particles SP, and the top main plate 2111 has a plurality of holes 241. The plurality of holes 241 in the top main plate 2111 can define a plurality of discharge regions. The plurality of discharge holes 231, spaced at equal intervals, can be formed in each of the plurality of regions of the top mesh plate 2113 that overlap with the plurality of holes 241 formed in the top main plate 2111. For example, 10 to 100 discharge holes 231 can be formed in each of the plurality of regions of the top mesh plate 2113 that overlap with the plurality of holes 241 in the top main plate 2111.

[0067] (Third implementation method)

[0068] Figure 6 This is a cross-sectional view showing the frame 200B of the battery assembly 10 according to an embodiment of the present disclosure. Figure 7 This is a cross-sectional view showing a portion of a battery assembly 10 according to an embodiment of the present disclosure. Hereinafter, it will be described... Figure 6 and Figure 7 The battery components are concentrated in the reference Figures 1 to 4 The differences described in the battery assembly 10.

[0069] Reference Figure 6 and Figure 7 Multiple discharge holes 231 may be formed in at least one of the first side cover plate 213 and the second side cover plate 215 of the frame 200B of the battery assembly 10 in this embodiment.

[0070] In this embodiment, a plurality of discharge regions 223 spaced apart from each other are formed in the first side cover plate 213 of the frame 200B, and a plurality of discharge holes 231 having a width W1 can be arranged in each discharge region 223 to block the discharge of spark particles SP. The plurality of discharge regions 223 can be arranged on the first side cover plate 213 of the frame 200B in a vertical direction (e.g., along the Z-axis) and a second horizontal direction (e.g., along the Y-axis). In each discharge region 223, the plurality of discharge holes 231 can be spaced apart from each other at equal intervals, and the number of discharge holes 231 provided in each discharge region 223 can be in the range of 10 to 100.

[0071] In this embodiment, a plurality of discharge regions 225 spaced apart from each other can be formed in the second side cover plate 215 of the frame 200B, and a plurality of discharge holes 231 having a width W1 can be arranged in each discharge region 225 to block the discharge of spark particles SP. The plurality of discharge regions 225 can be arranged on the second side cover plate 215 in a vertical direction (e.g., along the Z-axis) and a second horizontal direction (e.g., along the Y-axis). In each discharge region 225, the plurality of discharge holes 231 can be spaced apart from each other at equal intervals, and the number of discharge holes 231 provided in each discharge region 225 can be in the range of 10 to 100.

[0072] Figure 6 The example shows the drain hole 231 arranged in the first side cover plate 213 and the second side cover plate 215 of the frame 200B, but in some embodiments, the drain hole 231 may also be arranged in the top cover plate 211 of the frame 200B.

[0073] (Fourth Implementation)

[0074] Figure 8 This is a cross-sectional view showing a portion of a battery assembly 10 according to an embodiment of the present disclosure. Hereinafter, it will be described... Figure 8 The battery assembly 10 is concentrated in relation to the reference. Figure 6 and Figure 7 The differences described in the battery assembly 10.

[0075] Reference Figure 8 The first side cover 213A of the frame 200C of the battery assembly 10 may include a first side main board 2131 and a first side mesh board 2133. The first side main board 2131 may be connected to or integrated with the top cover 211. The first side main board 2131 may be connected to the first side mesh board 2133. Figure 8 An example is shown where the first side mesh 2133 is attached to the inner surface of the first side surface 117 of the first side main board 2131 facing the battery cell 110. However, the first side mesh 2133 can also be attached to the outer surface of the first side main board 2131.

[0076] Multiple discharge holes 231 with a width W1 can be formed in the first side panel 2133 to block the emission of spark particles SP, and multiple holes 243 can be formed in the first side main board 2131. The multiple holes 243 in the first side main board 2131 can define multiple discharge regions. The multiple discharge holes 231 spaced at equal intervals can be in each of the multiple regions of the first side panel 2133 that overlap with the multiple holes 243 in the first side main board 2131. For example, 10 to 100 discharge holes 231 can be arranged in each of the multiple regions of the first side panel 2133 that overlap with the multiple holes 243 in the first side main board 2131.

[0077] The second side cover 215A of the frame 200C of the battery assembly 10 may include a second side main board 2151 and a second side mesh board 2153. The second side main board 2151 may be connected to or integrated with the top cover 211. The second side main board 2151 may be connected to the second side mesh board 2153. Figure 8 An example is shown where the second side mesh 2153 is attached to the inner surface of the second side surface 118 of the second side main board 2151 facing the battery cell 110. However, the second side mesh 2153 can also be attached to the outer surface of the second side main board 2151.

[0078] Multiple discharge holes 231, with a width W1 and designed to block the discharge of spark particles SP, can be formed in the second side panel 2153 of the frame 200C, and multiple holes 245 can be formed in the second side main panel 2151. The multiple holes 245 in the second side main panel 2151 can define multiple discharge areas. Multiple discharge holes 231 spaced at equal intervals can be arranged in each of the multiple areas of the second side panel 2153 that overlap with the multiple holes 245 in the second side main panel 2151. For example, 10 to 100 discharge holes 231 can be arranged in each of the multiple areas of the second side panel 2153 that overlap with the multiple holes 245 in the second side main panel 2151.

[0079] (Fifth Implementation)

[0080] Figure 9 This is a cross-sectional view showing a portion of a battery assembly 10 according to an embodiment of the present disclosure. Hereinafter, it will be described... Figure 9 The battery assembly 10 is concentrated in relation to the reference. Figures 1 to 4 The differences described in the battery assembly 10.

[0081] Reference Figure 9In the frame 200D of the battery assembly 10, a plurality of discharge holes 231 can be arranged in the bottom cover plate 217. In an embodiment, a plurality of discharge regions 227 spaced apart from each other can be formed in the bottom cover plate 217, and a plurality of discharge holes 231 having a width W1 for blocking the discharge of spark particles SP can be arranged in each discharge region 227. The plurality of discharge regions 227 can be arranged on the bottom cover plate 217 of the frame 200D along a first horizontal direction (e.g., along the X-axis) and a second horizontal direction (e.g., along the Y-axis). In each discharge region 227, the plurality of discharge holes 231 can be spaced apart at equal intervals. The number of discharge holes 231 formed in each discharge region 227 can be in the range of 10 to 100.

[0082] (Sixth Implementation Method)

[0083] Figure 10 This is a cross-sectional view showing a portion of a battery assembly 10 according to an embodiment of the present disclosure. Hereinafter, it will be described... Figure 10 The battery assembly 10 is concentrated in relation to the reference. Figure 9 The differences described in the battery assembly 10.

[0084] Reference Figure 10 The bottom cover 217A of the frame 200E of the battery assembly 10 may include a bottom main board 2171 and a bottom mesh board 2173. The bottom main board 2171 may be connected to or integrated with the first side cover 213 and the second side cover 215. The bottom main board 2171 may be connected to the bottom mesh board 2173. Figure 10 The bottom mesh 2173 is shown attached to the inner surface of the bottom surface 115 of the bottom main board 2171 facing the battery cell 110, but the bottom mesh 2173 can also be attached to the outer surface of the bottom main board 2171.

[0085] Multiple discharge holes 231 with a width W1 can be formed in the bottom mesh plate 2173 of the frame 200E to block the discharge of spark particles SP, and multiple holes 247 can be formed in the bottom main plate 2171. The multiple holes 247 in the bottom main plate 2171 can define multiple discharge areas. Multiple discharge holes 231 spaced at equal intervals can be formed in each of the multiple areas of the bottom mesh plate 2173 that overlap with the multiple holes 247 in the bottom main plate 2171. For example, 10 to 100 discharge holes 231 can be formed in each of the multiple areas of the bottom mesh plate 2173 that overlap with the multiple holes 247 in the bottom main plate 2171.

[0086] (Seventh Implementation)

[0087] Figure 11 This is a perspective view showing a battery pack 50 according to an embodiment of the present disclosure.

[0088] Reference Figure 11 as well as Figures 1 to 4 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 embodiments, the battery pack 50 may include a plurality of battery components 10 arranged along a first horizontal direction (e.g., along the X-axis) and / or a second horizontal direction (e.g., along the Y-axis). 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.

[0089] According to an embodiment of this disclosure, discharge holes 231 are formed in the frame 200 of the battery assembly 10, and each is configured to have a size that blocks the discharge of spark particles SP. As a result, spark particles SP generated at the cell level, for example due to a short circuit between the cathode and anode, can be prevented from escaping into the external space ES of the frame 200. In this way, one of the three elements of a flame (ignition source) can be removed, thereby suppressing the generation of a flame within the battery pack 50.

[0090] (Eighth Implementation)

[0091] Figure 12 This is a schematic perspective view of a vehicle 600 including a battery pack 50 according to an embodiment of the present disclosure.

[0092] Reference Figure 12 The vehicle 600 according to embodiments of the present disclosure may include one or more battery packs 50 as described in the previous embodiments. The vehicle 600 according to the present disclosure may be, for example, an electric vehicle, a hybrid vehicle, or a plug-in hybrid vehicle. The vehicle 600 includes various types of vehicles, such as four-wheeled vehicles and two-wheeled or three-wheeled vehicles. In particular, according to embodiments of the present disclosure, the vehicle 600 can operate by feeding power from the battery packs 50.

[0093] The present disclosure has been described in detail above with reference to the accompanying drawings and embodiments. However, the embodiments described in this specification and the configurations shown in the drawings are merely exemplary embodiments of the present disclosure and do not represent all the technical concepts of the present disclosure. Therefore, it should be understood that various equivalents and modifications that can be used as alternatives to the embodiments may exist at the time of submission.

Claims

1. A battery assembly, the battery assembly comprising: A battery cell block, wherein the battery cell block comprises a plurality of battery cells; as well as A frame that covers at least one surface of the battery cell block. The frame includes a plurality of exhaust holes configured to discharge gas, and The width of each of the plurality of discharge holes is greater than 0.01 mm and less than 0.61 mm.

2. The battery assembly according to claim 1, wherein, The frame includes a top cover plate facing the top surface of the battery cell block, 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 a second side cover plate facing a second side surface of the battery cell block. The top cover plate includes the plurality of discharge holes.

3. The battery assembly according to claim 2, wherein, 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 discharge holes and connected to the first main board, and In the first mesh plate, the plurality of discharge holes are arranged in each region of the first mesh plate that overlaps with the plurality of holes in the first main plate.

4. The battery assembly according to claim 1, wherein, The frame includes a top cover plate facing the top surface of the battery cell block, 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 a second side cover plate facing a second side surface of the battery cell block. The bottom cover plate includes the plurality of discharge holes.

5. The battery assembly according to claim 1, wherein, The framework includes: A top cover plate facing the top surface of the battery cell block; A bottom cover plate, the bottom cover plate facing the bottom surface of the battery cell block; A first side cover plate, the first side cover plate facing the first side surface of the battery cell block; and The second side cover plate faces the second side surface of the battery cell block, and Wherein, at least one of the first side cover plate and the second side cover plate includes the plurality of discharge holes.

6. The battery assembly according to claim 5, wherein, 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 discharge holes and is connected to the second main board. In the second mesh plate, the plurality of discharge holes are arranged in each region of the second mesh plate that overlaps with the plurality of holes in the second main plate.

7. The battery assembly according to claim 1, wherein, The framework includes multiple emission zones, and The plurality of discharge holes are arranged at equal intervals in each of the plurality of discharge regions.

8. The battery assembly according to claim 7, wherein, In each of the plurality of emission zones, the number of the plurality of emission orifices is in the range of 10 to 100.

9. The battery assembly according to claim 1, wherein, The frame has a monolithic structure.

10. The battery assembly according to claim 1, wherein, The framework includes: A top cover plate facing the top surface of the battery cell block; A bottom cover plate, the bottom cover plate facing the bottom surface of the battery cell block; A first side cover plate, the first side cover plate facing the first side surface of the battery cell block; and The second side cover plate faces the second side surface of the battery cell block, and The plurality of battery cells are stacked along a first direction between the first side cover and the second side cover.

11. A battery pack, the battery pack comprising: Battery pack casing; A battery assembly, the battery assembly being housed within the battery pack housing; as well as A battery pack cover, which is attached to the battery pack housing to cover the battery assembly. The battery assembly includes: Battery cell block, the battery cell block comprising a plurality of battery cells; and A frame that covers at least one surface of the battery cell block. The frame includes a plurality of exhaust holes configured to discharge gas, and The width of each of the plurality of discharge holes is greater than 0.01 mm and less than 0.61 mm.

12. The battery pack according to claim 11, wherein, The framework includes: A top cover plate facing the top surface of the battery cell block; A bottom cover plate, the bottom cover plate facing the bottom surface of the battery cell block; A first side cover plate, the first side cover plate facing the first side surface of the battery cell block; and The second side cover plate faces the second side surface of the battery cell block, and The top cover plate includes the plurality of discharge holes.

13. The battery pack according to claim 12, wherein The top cover includes multiple emission zones, and in, The plurality of discharge holes are arranged at equal intervals in each of the plurality of discharge zones.

14. The battery pack according to claim 12, wherein, 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 discharge holes and connected to the first main board, and In the first mesh plate, the plurality of discharge holes are arranged at equal intervals in each region of the first mesh plate that overlaps with the plurality of holes in the first main plate.

15. The battery pack according to claim 11, wherein The framework includes: A top cover plate facing the top surface of the battery cell block; A bottom cover plate, the bottom cover plate facing the bottom surface of the battery cell block; A first side cover plate, the first side cover plate facing the first side surface of the battery cell block; as well as The second side cover plate faces the second side surface of the battery cell block, and Wherein, at least one of the first side cover plate and the second side cover plate includes the plurality of discharge holes.

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