Exhaust device and battery package including same

Abstract

Disclosed herein are an exhaust device and a battery package including the same. The exhaust device of the present invention comprises: a shield part that blocks exhaust gas to switch the direction in which the exhaust gas travels; a cooling plate in which a through-hole portion is formed to pass the exhaust gas, and which dissipates heat from the exhaust gas; and an exhaust filter portion installed in the through hole portion of the cooling plate to filter the exhaust gas whose direction is switched by the shield portion.

Description

Technical Field

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0026259, filed on February 27, 2023, and all contents disclosed in the document of this patent application are incorporated as a part of this specification.

[0002] The present invention relates to an exhaust device and a battery package including the exhaust device, which can prevent exhaust gas generated during ignition of a battery module from directly colliding with an exhaust filter, and can prevent dust particles larger than the pitch of the mesh of the exhaust filter from being discharged, and can reduce the possibility of ignition. Background Art

[0003] Generally, a secondary battery includes an anode, a cathode, and an electrolyte, and uses a chemical reaction to generate electrical energy. Due to the advantage of being able to charge and discharge, the use of secondary batteries has gradually increased. Since lithium secondary batteries among such secondary batteries have a high energy density per unit weight, lithium secondary batteries are widely used as power sources for electronic communication devices or as drive sources for high-output hybrid vehicles and electric vehicles.

[0004] In terms of the shape of these secondary batteries, demand is increasing for square secondary batteries and pouch-type secondary batteries, which can be applied to products such as mobile phones due to their thin thickness. In terms of the materials of secondary batteries, demand is increasing for lithium secondary batteries (such as lithium ion batteries and lithium ion polymer batteries) with high energy density, discharge voltage and output stability.

[0005] The types of secondary batteries widely used today include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. The operating voltage of these secondary batteries is approximately 2.5V to 4.2V. When a higher output voltage is required, a battery module is formed by connecting multiple secondary batteries in series, and a battery pack is formed by connecting multiple battery modules. In addition, a battery pack is formed by connecting multiple secondary batteries in parallel, depending on the required charge and discharge capacity of the battery pack. Therefore, the number of secondary batteries and the electrical connection structure of the battery pack can be selected in various ways according to the required output voltage or charge and discharge capacity.

[0006] In a battery pack comprising multiple battery modules, it is important to facilitate the dissipation of heat generated from each battery module. In some cases, the heat generated during the battery pack's charging and discharging processes is not effectively dissipated. In such cases, when heat accumulates in the battery modules, the modules may degrade. When degradation of the battery modules accelerates, the modules may catch fire or explode. Therefore, high-power, large-capacity battery packs are equipped with cooling devices and safety devices to cool each battery module.

[0007] When thermal runaway occurs inside a battery module, a large amount of flammable exhaust gas is generated. However, since the battery pack that houses the battery module is sealed from the outside, the interior of the battery pack is unlikely to ignite due to insufficient oxygen.

[0008] When combustible exhaust gases from the battery pack are discharged to the outside, high-temperature dust may come into contact with the air. When dust particles in the high-temperature exhaust gases exceed a certain size, they can act as ignition points. To reduce the particle size of dust particles in the exhaust gases, a filter is installed in the exhaust system, and the filter mesh is designed to be smaller, thereby reducing the particle size of dust particles discharged to the outside.

[0009] However, since a large amount of exhaust gas is discharged to the outside through the narrow exhaust port of the exhaust device, the flow rate and pressure of the exhaust gas increase significantly. When the high-speed and high-pressure exhaust gas collides with the filter, the filter mesh expands, and large dust particles pass through the filter and are discharged to the outside. As a result, the possibility of battery pack ignition may increase.

[0010] The background technology of the present invention is disclosed in Korean Patent Application Publication No. 2022-0056024 (published on May 4, 2022, entitled "Pack Housing With Integrated Filter Mesh Applied To Venting Hole And Battery Pack Including Same"). Summary of the Invention

[0011] Technical issues

[0012] In order to solve the above-mentioned problems, an object of the present invention is to provide an exhaust device capable of preventing dust of a combustible size from being discharged among combustible dust in exhaust gas, and a battery package including the exhaust device.

[0013] An object of the present invention is to provide an exhaust device capable of preventing dust of a certain size or larger among combustible dust from serving as an ignition point when coming into contact with external air, and a battery package including the exhaust device.

[0014] An object of the present invention is to provide an exhaust device capable of significantly reducing the pressure of exhaust gas applied to an exhaust filter portion, and a battery package including the exhaust device.

[0015] An object of the present invention is to provide an exhaust device capable of preventing an exhaust filter portion from being deformed or damaged due to the pressure of exhaust gas, and a battery package including the exhaust device.

[0016] An object of the present invention is to provide an exhaust device capable of suppressing ignition of dust outside a battery package and preventing the occurrence of fire, and a battery package including the exhaust device.

[0017] An object of the present invention is to provide an exhaust device capable of transferring heat energy of exhaust gas to a housing through a cooling body to improve heat dissipation performance, and a battery package including the exhaust device.

[0018] An object of the present invention is to provide a venting device and a battery package including the venting device.

[0019] The technical problems to be solved by the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention that are not described can be understood through the following description and will be more clearly understood through the examples of the present invention. In addition, it is obvious that the objects and advantages of the present invention can be embodied by the devices indicated in the claims and their combinations.

[0020] Technical Solution

[0021] The present invention may be applied to an exhaust device installed in a battery pack to filter exhaust gas from the battery pack, and a battery package in which the exhaust device is installed.

[0022] The exhaust device according to the present invention includes: a plate provided with a through-hole portion for allowing exhaust gas to pass through; a deflection portion, which covers the through-hole portion in a passing direction by being spaced apart from the through-hole portion in a direction opposite to the direction in which the exhaust gas passes through the through-hole portion; and an exhaust filter portion, which is installed at the through-hole portion of the plate to filter the exhaust gas passing through the through-hole portion.

[0023] The plate may include a cooling plate that dissipates heat of the exhaust gas passing through the through-hole portion.

[0024] The deflecting portion may include a deflecting panel covering the through-hole portion; and a frame supporting the deflecting panel such that the deflecting panel and the plate are spaced apart.

[0025] The deflection panel may be arranged to face the through-hole portion of the plate.

[0026] The edge of the deflector panel and the cooling plate are spaced apart in the passing direction.

[0027] The frame may connect the deflection panels and the board.

[0028] The frame may define a bypass space between the deflection panel and the board.

[0029] The frame may include a front frame in which the deflection panel is installed, a rear frame facing the front frame and spaced apart from the front frame, and a connecting frame connecting the front frame and the rear frame.

[0030] The connection frame may extend from the front frame toward a cooling plate side.

[0031] The rear frame may be secured to a panel.

[0032] A plurality of connection frames may be provided to be spaced apart from each other in a circumferential direction of the deflecting panel.

[0033] Therefore, a detour space can be provided between the front frame and the board.

[0034] The plate may include a main body provided with a through hole portion and a step provided at a circumference thereof that is thinner than the main body.

[0035] The through-hole portions of the plate may be arranged in a grid shape.

[0036] The exhaust filter portion may include a first exhaust filter portion arranged inside the through-hole portion in the passing direction, and a second exhaust filter portion arranged outside the through-hole portion in the passing direction.

[0037] The deflecting portion, the exhaust filter portion, and the plate may be arranged to be aligned on a straight line along the passing direction.

[0038] The exhaust device according to the present invention includes: a deflection portion, which covers the through-hole portion in the passing direction to change the traveling direction of the exhaust gas; a cooling plate, which is provided with a through-hole portion for allowing the exhaust gas to pass through, and the cooling plate dissipates the heat of the exhaust gas; and an exhaust filter portion, which is installed at the through-hole portion of the cooling plate to filter the exhaust gas deflected by the deflection portion.

[0039] The deflecting portion may include: a deflecting panel shielding the through-hole portion; and a frame connecting the deflecting panel and the cooling plate and providing a bypass space between the deflecting panel and the cooling plate.

[0040] The deflecting panel may be arranged to face the through-hole portion of the cooling plate.

[0041] The deflector panels may deflect the exhaust gases towards the periphery of the frame.

[0042] The frame may include: a front frame in which the deflection panel can be installed; a plurality of connecting frames which extend from the front frame toward the cooling plate and define a bypass space between the cooling plate and the deflection panel; and a rear frame which is connected to the plurality of connecting frames and is installed at the cooling plate to face the front frame.

[0043] The cooling plate may include: a cooling body in which a through-hole portion may be provided; and a heat conduction promoting portion provided at a circumference of the cooling body and thinner than the circumference of the cooling body.

[0044] The through-hole portions of the cooling plate may be arranged in a grid.

[0045] The exhaust filter portion may include a first exhaust filter portion arranged inside the through-hole portion in the passing direction, and a second exhaust filter portion arranged outside the through-hole portion in the passing direction.

[0046] The deflector, the exhaust filter, and the cooling plate may be arranged on a straight line.

[0047] According to the present invention, the battery package includes: one or more battery modules, which are arranged inside a shell; at least one internal filter portion, which is arranged to shield the outside of the battery module to perform primary filtering of exhaust gas generated during ignition of the one or more battery modules; and an exhaust device, which deflects the exhaust gas filtered by the at least one internal filter portion and includes a net for secondary filtering of combustible-sized dust in the exhaust gas filtered by the at least one internal filter portion.

[0048] The exhaust device may include: a deflection portion that faces at least one internal filter portion and blocks the exhaust gas to change the direction of travel of the exhaust gas; a cooling plate that is provided with a through-hole portion, the cooling plate being configured to allow the exhaust gas to pass through and dissipate the heat of the exhaust gas; and an exhaust filter portion that is installed at the through-hole portion of the cooling plate to filter the exhaust gas whose direction is changed by the deflection portion.

[0049] One or more internal filters may be provided at each of both widthwise ends of the battery module, and an exhaust device may be coupled to both sides of the case in a manner opposing the one or more internal filters.

[0050] The exhaust device may include two or more exhaust devices respectively installed on both sides of the housing.

[0051] The deflecting portion includes a deflecting panel installed between the one or more internal filter portions and the cooling plate to block the exhaust gas, and a frame connecting the deflecting panel and the cooling plate and forming a bypass space therebetween.

[0052] The deflecting panel may be arranged to face the through-hole portion of the cooling plate.

[0053] The deflector panels may detour the exhaust gas toward a periphery of the frame.

[0054] The frame may include: a front frame in which the deflection panel can be installed; a plurality of connecting frames that extend from the front frame toward the cooling plate side and form a bypass space between the cooling plate and the deflection panel; and a rear frame that is connected to the plurality of connecting frames and is installed at the cooling plate to face the front frame.

[0055] The cooling plate may include: a cooling body in which the through-hole portion may be provided; and a heat conduction promoting portion provided at a periphery of the cooling body with a thickness thinner than that of the cooling body and coupled to the housing in surface contact with the housing.

[0056] The through-hole portions of the cooling plate may be arranged in a grid shape.

[0057] The exhaust filter portion may include a first exhaust filter portion arranged inside the through-hole portion in the passing direction; and a second exhaust filter portion arranged outside the through-hole portion in the passing direction.

[0058] The deflector, the exhaust filter, and the cooling plate may be arranged on a straight line.

[0059] Beneficial effects

[0060] According to the present invention, the exhaust device blocks and deflects the exhaust gas filtered by the internal filter unit, and secondly filters the combustible-sized dust in the exhaust gas filtered by the internal filter unit. This prevents combustible-sized dust from being discharged from the exhaust gas. Furthermore, it prevents combustible dust particles of a certain size or larger from becoming ignition points when they come into contact with external air.

[0061] According to the present invention, since the exhaust gas reaches the exhaust filter portion after being deflected by the deflecting portion, the pressure of the exhaust gas applied to the exhaust filter portion can be significantly reduced.

[0062] According to the present invention, the pressure of the exhaust gas can be significantly reduced, thereby preventing the mesh of the exhaust filter from expanding due to the pressure of the exhaust gas. Therefore, dust particles larger than the pitch of the mesh of the exhaust filter can be prevented from being discharged through the exhaust filter.

[0063] According to the present invention, since dust of a combustible size is filtered by the exhaust filter, ignition of dust outside the battery pack can be suppressed, thereby preventing the occurrence of fire.

[0064] According to the present invention, since the thermal contact area between the cooling plate and the housing is increased, heat dissipation performance can be improved since heat energy of the exhaust gas is transferred to the housing through the cooling body.

[0065] According to the present invention, since the cooling plate reduces the temperature of the exhausted dust to below the ignition temperature, ignition of the dust outside the battery package can be prevented.

[0066] In addition to the above-mentioned beneficial effects, specific effects of the present invention will be further described while describing specific details of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 is a perspective view schematically showing the internal structure of a battery package according to the present invention.

[0068] Figure 2 It is schematically shown Figure 1 A perspective view of the internal filter section and venting device of a battery enclosure.

[0069] Figure 3 It is schematically shown Figure 2 An exploded perspective view of the exhaust system.

[0070] Figure 4 is schematically shown in Figure 2 A perspective view of an exhaust device that deflects the flow direction of exhaust gas.

[0071] Figure 5 is schematically shown in Figure 2 A perspective view of exhaust gas discharged to the outside from an exhaust device.

[0072] [Description of Reference Signs]

[0073] 1: Battery Pack 10: Housing 11: Heat Dissipation Step 20: Battery Module 30: Internal Filter 31: Filter Frame 33: Pre-Filter 100: Exhaust Device 110: Deflector 111: Deflection Panel 113: Frame 114: Front Frame 115: Connecting Frame 116: Rear Frame 18: Detour Space 120: Cooling Plate 121: Cooling Body 122: Through-Hole 123: Side 124: Heat Conduction Enhancement Unit 130: Exhaust Filter 131: First Exhaust Filter 132: Second Exhaust Filter DETAILED DESCRIPTION

[0074] Hereinafter, preferred embodiments of the present invention will be described.

[0075] The present invention is not limited to the embodiments disclosed below, and various changes can be applied and can be implemented in various different forms. The embodiments herein are provided only to complete the disclosure of the present invention and fully inform those skilled in the art of the scope of the present invention. Therefore, the present invention is not limited to the embodiments disclosed below, and it should be understood that the present invention includes all changes and equivalents encompassed in the technical spirit and scope of the present invention, as well as the replacement or addition of the configuration of one embodiment with the configuration of another embodiment.

[0076] The accompanying drawings are intended only to facilitate understanding of the embodiments disclosed herein, and it should be understood that the technical concepts disclosed herein are not limited by the accompanying drawings and encompass all modifications, equivalents, and substitutions within the spirit and technical scope of the present invention. In the accompanying drawings, although the size or thickness of components may be exaggeratedly larger or smaller for ease of understanding, this should not be interpreted as limiting the scope of protection of the present invention.

[0077] The terms used herein are only used to describe specific embodiments or examples and are not intended to limit the present invention. In addition, expressions in the singular include expressions in the plural, unless the context clearly dictates otherwise. In this article, terms such as "including" and "consisting of" are intended to indicate the presence of features, quantities, steps, operations, components, parts, or combinations thereof described in the specification. That is, it should be understood that terms such as "including", "consisting of" used herein should not exclude the possibility of the presence or addition of one or more other features, quantities, steps, operations, components, parts, or combinations thereof.

[0078] Although terms including ordinal numbers such as "first" and "second" may be used to describe various components, these components are not limited by these terms. These terms are used only for the purpose of distinguishing one component from another.

[0079] It should be understood that when an element is referred to as being “connected” to another element, the element can be directly connected to the other element or an intervening element can exist in between. On the other hand, when an element is referred to as being “directly connected” to another element, it should be understood that there are no intervening elements in between.

[0080] When an element is referred to as being “on” or “under” another element, it should be understood that intervening elements may be present in between as well as directly above or below the other element.

[0081] Unless otherwise defined, all terms (including technical or scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant technology, and unless explicitly defined herein, terms such as those defined in commonly used dictionaries should not be interpreted in an idealized or overly formal sense.

[0082] Hereinafter, a battery pack according to an embodiment of the present invention will be described.

[0083] Figure 1 is a perspective view schematically showing the internal structure of a battery pack according to the present invention, Figure 2 It is schematically shown Figure 1 A perspective view of the internal filter portion and exhaust device of a battery enclosure, Figure 3 It is schematically shown Figure 2 An exploded perspective view of the exhaust system, Figure 4 is schematically shown in Figure 2 A perspective view of the exhaust device deflecting the flow direction of the exhaust gas, and Figure 5 is schematically shown in Figure 2 A perspective view of exhaust gas discharged to the outside from an exhaust device.

[0084] Reference Figures 1 to 5 , a battery package 1 according to an embodiment of the present invention includes a battery module 20 , an internal filter 30 , and an exhaust device 100 .

[0085] The battery package 1 includes a housing 10. The housing 10 may be made of a heat-conducting material to radiate internal heat to the outside. In one example, the housing 10 may have a rectangular hexahedron shape. However, the shape of the housing 10 is not limited thereto.

[0086] At least one battery module 20 is installed in the housing 10. Each battery module 20 is accommodated in the internal space of the housing 10. A plurality of battery cells (not shown) are stacked in the battery module 20. Here, the battery cells may be any of pouch-type battery cells, cylindrical battery cells, and square battery cells. The battery module 20 may be manufactured in various sizes and shapes.

[0087] At least one exhaust device 100 is installed in the housing 10. Gas and dust generated by ignition of the battery module 20 move from the internal space of the housing 10 in which the battery module 20 is installed toward the exhaust device 100. Although not shown, the battery package 1 may further include a structure that guides the flow of gas and dust generated from the battery module 20 during thermal runaway.

[0088] The internal filter unit 30 is installed on the exhaust path of gas and dust from the space where the battery module 20 is installed to the exhaust device 100. The internal filter unit 30 is arranged to block the exhaust path of gas and dust generated from the battery module 20. For example, Figure 1 As shown, the internal filter unit 30 is arranged to block the outside of the battery module 20. The internal filter unit 30 may be installed to block the entire flow cross section of the exhaust path of gas and dust so that the gas and dust are not deflected.

[0089] At least one internal filter unit 30 is installed along the gas and dust exhaust path to primarily filter exhaust gas generated when the battery module 20 is ignited. When two or more internal filter units 30 are installed on the gas and dust exhaust path, the two or more internal filter units 30 may be installed to be spaced apart from each other along the path.

[0090] When there are different exhaust paths, an internal filter 30 may be installed for each exhaust path. Figure 1 In the illustrated embodiment, exhaust paths for gas and dust are provided at both widthwise ends of the battery module 20. Therefore, in this embodiment, a pair of internal filters 30 are installed inside the housing 10 to separate the both widthwise ends of the battery module 20.

[0091] The internal filter section 30 filters relatively large particles among the combustible dust contained in the exhaust gas. A pre-filter section that allows the exhaust gas to pass quickly while mainly filtering particles larger than a first size can be used as the internal filter section 30. The internal filter section 30 includes a filter section frame 31 having a plurality of connection holes therein and a pre-filter section 33 fixed to two opposite surfaces of the filter section frame 31. The filter section frame 31 separates the two width-wise ends of the battery module 20. In addition, the filter section frame 31 supports the pre-filter section 33 so that the pre-filter section 33 is not deformed or damaged by the exhaust gas generated when the battery module 20 is ignited. The pre-filter section 33 filters the combustible dust that passes through the plurality of connection holes.

[0092] The exhaust device 100 blocks and deflects exhaust gas containing particles larger than a first size filtered out by the internal filter unit 30, and secondarily filters combustible dust larger than a second size in the exhaust gas filtered by the internal filter unit 30. The second size is smaller than the first size. The exhaust device 100 filters combustible dust contained in the exhaust gas to prevent the combustible dust from being discharged. Among combustible dust particles, high-temperature dust larger than a certain size and discharged through the exhaust device 100 can act as an ignition point when it comes into contact with external air. However, because the exhaust device 100 performs a secondary filtration of combustible dust contained in the exhaust gas, ignition can be prevented even when small-sized dust contained in the exhaust gas is discharged to the outside.

[0093] The exhaust device 100 includes a deflecting portion 110 , a cooling plate 120 , and an exhaust filter portion 130 .

[0094] The deflector 110 is spaced apart from the inner filter 30 on the exhaust path of the exhaust gas. Furthermore, the deflector 110 is spaced apart from the exhaust filter 130. The deflector 110 is disposed so as to face the exhaust filter 130. The area of ​​the deflector 110 may be equal to or slightly larger than the area of ​​the exhaust filter 130.

[0095] Without the deflector 110, exhaust gas passing through the inner filter 30 flows rapidly in a straight line toward the exhaust filter 130 and reaches the exhaust filter 130. However, when the deflector 110 is installed as described above, the exhaust gas flowing toward the exhaust filter 130 collides with the deflector 110 and the flow rate is significantly reduced. As the flow rate of the exhaust gas decreases, relatively heavy dust in the exhaust gas falls due to gravity.

[0096] The deflector 110 blocks the exhaust gas from rapidly flowing from the inner filter 30 toward the exhaust filter 130 over the shortest distance, thereby changing the direction of the exhaust gas. The deflector 110 is arranged opposite the cooling plate 120. The deflector 110 is spaced apart from the cooling plate 120 to form a detour space 118 through which the deflected exhaust gas flows. The velocity vector of the exhaust gas flowing through the detour space 118 is significantly different from the normal direction of the surface of the cooling plate 120.

[0097] Cooling plate 120 includes through-holes 122 that allow exhaust gas to pass through. It absorbs heat from the exhaust gas and dissipates it rapidly. Cooling plate 120 is mounted so that it makes surface contact with housing 10, which is made of a thermally conductive material. Therefore, when exhaust gas passes through through-holes 122, its temperature is reduced by thermal contact with cooling plate 120.

[0098] Meanwhile, for lithium-ion batteries and lithium polymer batteries, experiments have found that dust generated during battery ignition ignites at temperatures of approximately 400°C or higher. However, according to the present invention, since the cooling plate 120 reduces the temperature of the exhausted dust to approximately 350°C to 380°C, ignition of the dust can be prevented because the dust is cooled to below the ignition temperature.

[0099] The exhaust filter 130 is mounted on the through-hole portion 122 of the cooling plate 120 to filter the exhaust gas deflected by the deflection portion 110. The through-hole portion 122 includes a plurality of through-holes. The through-holes of the through-hole portion 122 can be square or circular in shape at the center of the deflection panel 111. The filter surface of the exhaust filter 130 is arranged to block the through-hole portion 122.

[0100] According to this embodiment, since the exhaust gas reaches the exhaust filter 130 after being deflected by the deflection unit 110, the pressure of the exhaust gas applied to the exhaust filter 130 can be significantly reduced. Furthermore, by significantly reducing the pressure of the exhaust gas, the mesh of the exhaust filter 130 can be prevented from expanding due to the pressure of the exhaust gas. Consequently, dust particles larger than the pitch of the mesh of the exhaust filter 130 can be prevented from passing through the exhaust filter 130.

[0101] Furthermore, the mesh of the exhaust filter 130 is sized to filter dust particles approximately 1 mm or larger. Generally, dust particles approximately 1 mm or larger in size are more likely to ignite. In contrast, the exhaust filter 130 of the present invention filters out potentially ignitable dust particles 1 mm or larger, preventing the dust from igniting outside the battery package 1.

[0102] The inner filter portion 30 may be disposed at each of both widthwise ends of the battery module 20. The inner filter portion 30 may have a rectangular plate shape to partition a space between the exhaust device 100 and the housing 10.

[0103] The exhaust device 100 may be coupled to both sides of the housing 10 so as to face the inner filter portion 30. At least two exhaust devices 100 may be installed facing the inner filter portion 30. Therefore, gas and dust generated during ignition of the battery module 20 may be exhausted to both sides of the housing 10.

[0104] The deflecting unit 110 includes a deflecting panel 111 and a frame 113 .

[0105] The deflection panel 111 is installed between the internal filter unit 30 and the cooling plate 120 to shield the exhaust gas. The deflection panel 111 may be square in shape. The deflection panel 111 is arranged to face the through-hole portion 122 of the cooling plate 120. The deflection panel 111 is arranged away from the portion of the through-hole portion 122 into which the gas flows, and is larger than the through-hole portion 122 to shield the portion of the through-hole portion 122 into which the gas flows.

[0106] The frame 113 connects the deflection panels 111 and the cooling plates 120 and defines a bypass space 118 between the deflection panels 111 and the cooling plates 120. The frame 113 separates the deflection panels 111 and the cooling plates 120 by a certain distance.

[0107] When the exhaust gas primarily filtered in the internal filter unit 30 collides with the deflection panel 111, relatively large dust particles fall to the lower portion of the deflection panel 111. Therefore, the dust particles deflected by the deflection panel 111 to reach the exhaust filter unit 130 can be prevented from blocking the mesh of the exhaust filter unit 130, and the internal pressure of the exhaust gas can be prevented from increasing.

[0108] In addition, when the exhaust gas collides with and turns toward the peripheral side of the deflection panel 111, the pressure is reduced, and when the exhaust gas flows into the bypass space between the deflection panel 111 and the cooling plate 120, the pressure is even further reduced. Here, since the exhaust gas passes through the exhaust filter 130 after the pressure is reduced, the exhaust filter 130 can be prevented from being damaged or deformed by the flow pressure of the exhaust gas. In addition, since the pressure applied to the exhaust filter 130 is reduced, dust particles larger than the pitch of the mesh of the exhaust filter 130 can be prevented from passing through the exhaust filter 130. Therefore, since dust of combustible size is filtered by the exhaust filter 130, a fire outside the battery package 1 can be prevented.

[0109] The frame 113 includes a front frame 114 , a plurality of connection frames 115 , and a rear frame 116 .

[0110] The front frame 114 is connected to the deflection panel 111. The front frame 114 may be square or circular. The front frame 114 may be welded to the deflection panel 111, or may be fixed by a separate fastening member.

[0111] The plurality of connection frames 115 extend from the front frame 114 toward the cooling plate 120 and define a bypass space 118 between the front frame 114 and the deflection panel 111. The plurality of connection frames 115 are arranged perpendicular to the deflection panel 111. The plurality of connection frames 115 may be integrally formed with the front frame 114. In addition, the plurality of connection frames 115 may be connected to the front frame 114 by welding or fastening members.

[0112] The rear frame 116 is connected to the plurality of connection frames 115, faces the front frame 114, and is installed at the cooling plate 120. The rear frame 116 may be fixed to the cooling plate 120 by welding or fastening members. The rear frame 116 may be square or circular.

[0113] The front frame 114 and the rear frame 116 may be larger than the through-hole portion 122. Therefore, the exhaust gas may be turned to flow into the through-hole portion 122 after colliding with the deflection panel 111. In addition, the length of the detour path of the exhaust gas may be increased.

[0114] The frame 113 is entirely made of a heat-conductive material, so that the heat energy of the frame 113 can be transferred to the cooling plate 120. Therefore, the heat dissipation performance of the battery package 1 can be improved.

[0115] The cooling plate 120 may include a cooling body 121 and a heat conduction promoting portion 124 .

[0116] The through hole portion 122 is provided in the cooling body 121. The overall shape of the cooling body 121 is a square plate. The cooling body 121 can be made of a metal material with excellent thermal conductivity (such as aluminum or stainless steel). The thickness of the cooling body 121 can be the same or almost the same as the thickness of the housing 10 to exchange heat with the exhaust gas.

[0117] The heat conduction promoting portion 124 is arranged at the periphery of the cooling body 121 and has a thickness thinner than the thickness of the cooling body 121. There may be a step between the heat conduction promoting portion 124 and the cooling body 121. Here, mounting holes (not shown) for mounting the cooling plate 120 are provided on both sides of the housing 10. The heat dissipation steps 11 are provided on both sides of the mounting holes. When the cooling body 121 is mounted in the mounting holes, the heat conduction promoting portion 124 and the heat dissipation step 11 are in surface contact. In addition, the side portions 123 arranged at both sides of the cooling body 121 are in surface contact with the heat dissipation step 11. Therefore, since the thermal contact area between the cooling body 121 and the housing 10 is increased, the heat dissipation performance can be improved when the heat energy of the exhaust gas is transferred to the housing 10 through the cooling body 121.

[0118] The through-hole portions 122 of the cooling plate 120 may be arranged in a grid. The grid-shaped ribs across the through-hole portions 122 may stably support the exhaust filter 130 installed in the through-hole portions 122. Therefore, the exhaust filter 130 may be prevented from being deformed or damaged by gas pressure.

[0119] The exhaust filter 130 includes a first exhaust filter 131 and a second exhaust filter 132 .

[0120] The first exhaust filter portion 131 is arranged more on the inner side than the through-hole portion 122, and the second exhaust filter portion 132 is arranged more on the outer side than the through-hole portion 122. The first exhaust filter portion 131 and the second exhaust filter portion 132 have a size that can cover the entire through-hole portion 122. Here, the pitch of the mesh of the second exhaust filter portion 132 can be slightly smaller than or equal to the pitch of the mesh of the first exhaust filter portion 131. Therefore, the exhaust gas can be first filtered by the first exhaust filter portion 131 and then filtered again by the second exhaust filter portion 132. In addition, the second exhaust filter portion 132 can filter dust particles that are relatively smaller than the dust particles of the first exhaust filter portion 131 or dust particles of the same size.

[0121] When the through hole portion 122 has a square shape, the first exhaust filter portion 131 and the second exhaust filter portion 132 may also have a square shape. Depending on the shape of the through hole portion 122, the first exhaust filter portion 131 and the second exhaust filter portion 132 may have various shapes.

[0122] Although the present invention has been described with reference to the exemplary drawings, it should be understood that the present invention is not limited to the embodiments and drawings disclosed in this specification, and those skilled in the art will understand that various modifications are possible without departing from the scope and concept of the present invention. In addition, although the operational effects of the configuration according to the present invention are not explicitly described when describing the embodiments of the present invention, it should be understood that the configuration will also recognize predictable effects.

Claims

1. An exhaust device installed in a battery pack to filter exhaust gas from the battery pack, the exhaust device comprising: a cooling plate provided with a through-hole portion for allowing the exhaust gas to pass therethrough and dissipating heat of the exhaust gas; a deflecting portion that covers the through-hole portion in a passing direction by being provided spaced apart from the through-hole portion in a direction opposite to a direction in which the exhaust gas passes through the through-hole portion; and An exhaust filter portion is installed at the through-hole portion of the cooling plate to filter the exhaust gas passing through the through-hole portion.

2. The exhaust device according to claim 1, wherein: The deflection unit includes: a deflection panel covering the through-hole portion; and A frame connects the deflection panel and the cooling plate and provides a bypass space between the deflection panel and the cooling plate.

3. The exhaust device according to claim 2, wherein: The deflecting panel is arranged to face the through-hole portion of the cooling plate.

4. The exhaust device according to claim 2, wherein: The edge of the deflector panel and the cooling plate are spaced apart in the passing direction.

5. The exhaust device according to claim 2, wherein: The framework includes: a front frame in which the deflection panel is mounted; a plurality of connection frames extending from the front frame toward a cooling plate side and defining the bypass space between the cooling plate and the deflection panel; and a rear frame connected to the plurality of connection frames and installed at the cooling plate to face the front frame.

6. The exhaust device according to claim 1, wherein: The cooling plate comprises: a cooling body in which the through-hole portion is provided; and A heat conduction promoting portion is formed at a peripheral edge of the cooling body to be thinner than the cooling body.

7. The exhaust device according to claim 1, wherein: The through-hole portions of the cooling plate are arranged in a grid shape.

8. The exhaust device according to claim 6, wherein: The exhaust filter unit includes: a first exhaust filter portion, the first exhaust filter portion being arranged inside the through-hole portion in the passing direction; and A second exhaust filter portion is arranged outside the through-hole portion in the passing direction.

9. The exhaust device according to claim 1, wherein: The deflecting portion, the exhaust filter portion, and the cooling plate are arranged to be aligned on a straight line along the passing direction.

10. A battery package, comprising: one or more battery modules disposed within the housing; at least one internal filter portion arranged to shield the exterior of the battery module to perform primary filtering of exhaust gas generated during ignition of the battery module; and An exhaust device is provided in the housing as at least one exhaust device, which blocks the exhaust gas filtered by the at least one internal filter portion so as to bypass the exhaust gas, and includes a net for secondary filtering the dust of combustible size in the exhaust gas filtered by the internal filter portion.

11. The battery package according to claim 10, wherein: The exhaust device comprises: a deflecting portion facing the inner filter portion and blocking the exhaust gas to change a traveling direction of the exhaust gas; a cooling plate provided with a through-hole portion through which the exhaust gas passes and which dissipates heat of the exhaust gas; and An exhaust filter portion is installed at the through-hole portion of the cooling plate to filter the exhaust gas redirected by the deflecting portion.

12. The battery package according to claim 11, wherein: The one or more internal filters are provided at each of both widthwise ends of the battery module, and The exhaust device is coupled to both sides of the housing in a manner opposite to the one or more internal filters.

13. The battery package according to claim 12, wherein: Two or more exhaust devices are respectively installed on both sides of the housing.

14. The battery package according to claim 11, wherein: The deflection unit includes: a deflection panel mounted between the one or more internal filters and the cooling plate to block the exhaust gas; and A frame connects the deflecting panel and the cooling plate and forms a bypass space between the deflecting panel and the cooling plate.

15. The battery package according to claim 14, wherein: The deflecting panel is arranged to face the through-hole portion of the cooling plate.

16. The battery package according to claim 14, wherein: The deflector panels detour the exhaust gas toward a perimeter of the frame.

17. The battery package according to claim 14, wherein: The framework includes: a front frame in which the deflection panel is mounted; a plurality of connecting frames extending from the front frame toward a cooling plate side and forming the bypass space between the cooling plate and the deflection panel; and a rear frame connected to the plurality of connection frames and installed at the cooling plate to face the front frame.

18. The battery package according to claim 11, wherein: The cooling plate comprises: a cooling body in which the through-hole portion is provided; and A heat conduction promoting portion is provided at a periphery of the cooling body with a thickness thinner than that of the cooling body and is coupled to the housing in surface contact with the housing.

19. The battery package according to claim 18, wherein: The through-hole portions of the cooling plate are arranged in a grid shape.

20. The battery package according to claim 11, wherein The exhaust filter unit includes: a first exhaust filter portion, the first exhaust filter portion being arranged inside the through-hole portion in the passing direction; and A second exhaust filter portion is arranged outside the through-hole portion in the passing direction.

21. The battery package according to claim 11, wherein The deflecting portion, the exhaust filter portion, and the cooling plate are arranged on a straight line.

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