Filter structure and battery pack comprising the same

Abstract

The present disclosure provides a filter structure and a battery pack including the same, the filter structure including: a base frame having a hollow portion; and a filter portion including a plurality of filters in the base frame to filter out foreign matter in a gas, the plurality of filters having different angles with respect to a flow direction of the gas.

Description

Technical Field

[0001] This disclosure relates to a filter structure and a battery pack including the filter structure. Background Technology

[0002] Unlike primary batteries, which are not designed for (re)charging, secondary (or rechargeable) batteries are designed to discharge and be recharged. Low-capacity secondary batteries are used in portable small electronic devices such as smartphones, feature phones, laptops, digital cameras, and camcorders, while high-capacity secondary batteries are widely used as power sources for driving motors in hybrid and electric vehicles, as well as for storing electricity (e.g., household and / or utility-scale power storage). A secondary battery typically comprises an electrode assembly consisting of positive and negative electrodes, a housing that houses the electrode assembly, and electrode terminals connected to the electrode assembly.

[0003] A single secondary battery can be used, or multiple secondary batteries can be electrically connected to each other and housed in a casing to form a battery pack. In the event of thermal runaway within the battery pack, high-temperature gases are released from at least one individual battery cell (secondary battery), and these gases can be expelled to the outside through a vent within the battery pack. However, the high-temperature gases may include active material separated from the electrodes or molten aluminum particles, which could cause a flare to be ejected into the vent, potentially leading to a fire within the battery pack.

[0004] The information disclosed in this background section is intended to enhance the understanding of the background art of this disclosure, and therefore may contain information that does not constitute related (or prior art). Summary of the Invention

[0005] The embodiment includes a filter structure comprising: a base frame having a hollow portion; and a filter section including a plurality of filters within the base frame for filtering out foreign matter in a gas, the plurality of filters having different angles relative to the gas flow direction.

[0006] The base frame may include: a central frame; a first guide frame, a second guide frame, a third guide frame, and a fourth guide frame, arranged at regular intervals along the circumference (e.g., circumference) of the central frame; and a support frame, extending from opposite ends of the central frame and respectively connected to opposite ends of the first to fourth guide frames.

[0007] The filter section may include: a first filter, coupled to a first guide frame and a second guide frame; a second filter, coupled to a second guide frame and a third guide frame in a direction perpendicular to the first filter; a third filter, facing the first filter, coupled to a third guide frame and a fourth guide frame; and a fourth filter, facing the second filter, coupled to a fourth guide frame and a first guide frame.

[0008] The filter section may further include: a fifth filter, which is integrated with the first guide frame and the center frame; a sixth filter, which is integrated with the second guide frame and the center frame; a seventh filter, which is integrated with the third guide frame and the center frame; and an eighth filter, which is integrated with the fourth guide frame and the center frame.

[0009] The filter unit may include: a first filter, which is coupled to a first guide frame and a center frame; a second filter, which is coupled to a second guide frame and a center frame; a third filter, which is coupled to a third guide frame and a center frame; and a fourth filter, which is coupled to a fourth guide frame and a center frame.

[0010] The filter section may further include: a fifth filter, which is coupled to the first guide frame and the second guide frame; and a sixth filter, which faces the fifth filter and is coupled to the third guide frame and the fourth guide frame.

[0011] The filter section may include: a first filter having an arcuate shape, the first filter being coupled to a first guide frame and a second guide frame; a second filter having an arcuate shape, the second filter being coupled to a second guide frame and a third guide frame in a direction perpendicular to the first filter; a third filter having an arcuate shape, the third filter facing the first filter, the third filter being coupled to a third guide frame and a fourth guide frame; and a fourth filter having an arcuate shape, the fourth filter facing the second filter, the fourth filter being coupled to a fourth guide frame and a first guide frame.

[0012] The filter section may further include: a fifth filter, which is integrated with the first guide frame and the center frame; a sixth filter, which is integrated with the second guide frame and the center frame; a seventh filter, which is integrated with the third guide frame and the center frame; and an eighth filter, which is integrated with the fourth guide frame and the center frame.

[0013] The filter section may also include an auxiliary filter integrated into the support frame.

[0014] The matrix frame may also include a reinforcing frame, which connects the opposite ends of the first guide frame to the fourth guide frame respectively.

[0015] The filter section can have an aperture size of 40 to 150 mesh.

[0016] The embodiment includes a battery pack comprising: a battery module including a plurality of battery cells, each of the plurality of battery cells including a cell exhaust portion; a housing housing the battery module; a group exhaust portion on one side of the housing configured to exhaust gases generated from the plurality of battery cells to the outside; and a filter structure in the housing and between the battery module and the group exhaust portion, the filter structure being configured to filter foreign matter in the gases.

[0017] The housing may include: a housing body that houses the battery module through an open surface, the housing body including an end plate perpendicular to the open surface, and an exhaust portion attached to the end plate; a partition attached to the housing body between the end plate and the battery module to create an inflow space into which gas flows, and a filter structure located in the inflow space; and a housing cover attached to the open surface of the housing body.

[0018] The battery pack may also include a guide plate on the upper part of the battery module, the guide plate including a communication hole communicating with the individual cell exhaust section, the guide plate being configured to guide the flow of gas discharged from the individual cell exhaust section to the pack exhaust section.

[0019] The guide plate may also include a through hole that communicates with the inflow space, allowing gas introduced through the through hole to flow into the inflow space.

[0020] The separator may include a flange that protrudes toward the end plate side, and the filter structure is located on the flange.

[0021] The end plate may include an exhaust port facing the filter structure, through which gas that has passed through the filter structure is discharged, and the exhaust unit is attached to the end plate to communicate with the exhaust port.

[0022] The filter structure may include: a base frame having a hollow portion; and a filter section including multiple filters within the base frame to filter out foreign matter in the gas, the multiple filters having different angles relative to the gas flow direction.

[0023] The base frame may include: a central frame; a first guide frame, a second guide frame, a third guide frame, and a fourth guide frame, arranged at regular intervals along the circumference of the central frame; and a support frame, extending from opposite ends of the central frame and respectively connected to opposite ends of the first to fourth guide frames.

[0024] The filter section may include: a first filter, coupled to a first guide frame and a second guide frame; a second filter, disposed in a direction perpendicular to the first filter, coupled to the second guide frame and a third guide frame; a third filter, configured to face the first filter, coupled to the third guide frame and a fourth guide frame; and a fourth filter, configured to face the second filter, coupled to the fourth guide frame and the first guide frame. Attached Figure Description

[0025] Features will become apparent to those skilled in the art from the detailed description of exemplary embodiments with reference to the accompanying drawings, in which: Figure 1 This is a perspective view illustrating an example of a filter structure according to some embodiments of the present disclosure.

[0026] Figure 2 This is a perspective view illustrating an example of a base frame in a filter structure according to some embodiments of the present disclosure.

[0027] Figure 3 It shows along Figure 1 The image shows a cross-sectional view of an example filter structure according to a first embodiment of the present disclosure, taken by line AA.

[0028] Figure 4 This is a cross-sectional view illustrating an example of a filter structure according to a second embodiment of the present disclosure.

[0029] Figure 5 This is a cross-sectional view illustrating an example of a filter structure according to a third embodiment of the present disclosure.

[0030] Figure 6 This is a cross-sectional view illustrating an example of a filter structure according to a fourth embodiment of the present disclosure.

[0031] Figure 7 This is a cross-sectional view illustrating an example of a filter structure according to a fifth embodiment of the present disclosure.

[0032] Figure 8 This is a cross-sectional view illustrating an example of a filter structure according to a sixth embodiment of the present disclosure.

[0033] Figure 9 This is a perspective view illustrating an example of a battery pack according to some embodiments of the present disclosure; Figure 10 This is an exploded perspective view showing an example of a battery pack according to some embodiments of the present disclosure; Figure 11 It is shown Figure 9 A magnified view of region A; Figure 12This is a cross-sectional view illustrating an example of a filter structure in a battery pack according to some embodiments of the present disclosure; Figure 13 This is a cross-sectional view illustrating an example of a filter structure of a second embodiment in a battery pack according to some embodiments of the present disclosure; Figure 14 This is a cross-sectional view illustrating an example of a filter structure in a battery pack according to some embodiments of the present disclosure; Figure 15 This is a cross-sectional view illustrating an example of a filter structure of a fourth embodiment in a battery pack according to some embodiments of the present disclosure; Figure 16 This is a cross-sectional view illustrating an example of a filter structure of a fifth embodiment in a battery pack according to some embodiments of the present disclosure; and Figure 17 This is a cross-sectional view illustrating an example of a filter structure in a battery pack according to a sixth embodiment of some embodiments of the present disclosure. Detailed Implementation

[0034] Exemplary embodiments will now be described more fully below with reference to the accompanying drawings; however, they may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey exemplary implementation to those skilled in the art.

[0035] In the accompanying drawings, for clarity, the dimensions of layers and regions may be exaggerated. It will also be understood that when a layer or element is referred to as "on" another layer or substrate, it may be directly on said other layer or substrate, or there may be intervening layers. Furthermore, it will be understood that when a layer is referred to as "below" another layer, it may be directly below, or there may be one or more intervening layers. Additionally, it will be understood that when a layer is referred to as "between two layers," it may be the only layer between said two layers, or there may be one or more intervening layers. The same reference numerals always refer to the same elements.

[0036] The terms or words used in this specification and claims shall not be construed as having a general or dictionary meaning, but shall be interpreted as having meanings and concepts consistent with the technical concept of this disclosure, based on the principle that the inventor may be his / her own lexicon editor to appropriately define terms and concepts in order to best describe his / her disclosure.

[0037] The embodiments described in this specification and the constructions shown in the accompanying drawings are merely some of the embodiments of this disclosure and do not represent all the technical spirit, aspects, and features of this disclosure. Therefore, it should be understood that various equivalents and modifications may exist to replace or modify the embodiments described herein at the time of filing.

[0038] It will be understood that when an element or layer is referred to as being "on," "connected to," or "bonded to" another element or layer, the element or layer may be directly "on," directly connected to, or directly bonded to the other element or layer, or there may be one or more intermediary elements or intermediary layers. When an element or layer is referred to as being "directly on," "directly connected to," or "directly bonded to" another element or layer, there are no intermediary elements or intermediary layers. For example, when a first element is described as being "bonded" or "connected" to a second element, the first element may be directly bonded to or directly connected to the second element, or the first element may be indirectly bonded to or indirectly connected to the second element via one or more intermediary elements.

[0039] As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items. Furthermore, when describing embodiments of this disclosure, the use of “may” refers to “one or more embodiments of this disclosure.” Expressions such as “at least one of…” and “any one of…” modify the entire list of elements when following a list of elements, without modifying individual elements within that list. When a list of elements A, B, and C is specified using phrases such as “at least one of A, B, and C,” “at least one of A, B, or C,” “at least one selected from the group of A, B, and C,” or “at least one selected from A, B, and C,” the phrase may refer to any suitable combination (or subset) of A, B, and C and all suitable combinations (or subsets), such as A, B, C, A and B, A and C, B and C, or A and B and C. As used herein, the term “use” and its variations may be considered synonymous with the term “utilize” and its variations, respectively. As used herein, the terms “substantially,” “about,” and similar terms are used as approximate terms rather than as terms of degree, and are intended to explain the inherent biases of measured or calculated values ​​that will be recognized by one of ordinary skill in the art.

[0040] It will be understood that although the terms first, second, third, etc., may be used herein to describe various elements, components, regions, layers, and / or portions, these elements, components, regions, layers, and / or portions should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, or portion from another element, component, region, layer, or portion. Therefore, without departing from the teachings of the exemplary embodiments, the first element, first component, first region, first layer, or first portion discussed below may be referred to as a second element, second component, second region, second layer, or second portion.

[0041] For ease of description, spatial relative terms such as “below,” “under,” “lower,” “above,” and “upper” may be used herein to describe the relationship between one element or feature as shown in the figures and another element or feature(s). It will be understood that, in addition to the orientation shown in the figures, the spatial relative terms are also intended to cover different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as “below” or “under” other elements or features will subsequently be oriented “above” or “above” said other elements or features. Thus, the term “below” can cover both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein should be interpreted accordingly.

[0042] The terminology used herein is for the purpose of describing embodiments of this disclosure and is not intended to be limiting of this disclosure. As used herein, the singular forms “a” and “an” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that when the terms “comprising,” “including,” and / or variations thereof are used in this specification, it indicates the presence of the stated features, integers, steps, operations, elements, and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, and / or groups thereof.

[0043] Furthermore, any numerical range disclosed and / or described herein is intended to include all subranges containing the same numerical precision within the described range. For example, the range “1.0 to 10.0” is intended to include all subranges between the described minimum value of 1.0 and the described maximum value of 10.0 (inclusive), i.e., having a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as 2.4 to 7.6. Any maximum numerical limit described herein is intended to include all lower numerical limits contained therein, and any minimum numerical limit described in this specification is intended to include all higher numerical limits contained therein. Therefore, the applicant reserves the right to amend this specification and the claims to expressly describe any subranges contained within the range expressly described herein. All such ranges are intended to be inherently described in this specification such that any modification to expressly describe any such subrange will comply with the requirements of patent law.

[0044] Referring to two compared elements, features, etc., as “identical” can mean that they are “substantially identical.” Therefore, the phrase “substantially identical” can include cases with deviations considered low in the art (e.g., 5% or less). Additionally, when a parameter is said to be uniform in a given region, it can mean that it is uniform in terms of average value.

[0045] Throughout this specification, unless otherwise stated, each element may be singular or plural.

[0046] Arranging any element "above (or below)" or "on (or under)" another element can mean that any element can be positioned to contact the upper (or lower) surface of the element, and that the other element can be positioned between the element and any element positioned on (or below) the element.

[0047] Additionally, it will be understood that when a component is referred to as “linked,” “combined,” or “connected” to another component, these components can be directly “combined,” “linked,” or “connected” to each other, or another component can be “placed” between these components.

[0048] Throughout this specification, unless otherwise stated, when “A and / or B” is stated, it means A, B, or A and B. That is, “and / or” includes any or all combinations of the listed items. Unless otherwise stated, when “C to D” is stated, it means C or greater and D or less.

[0049] Figure 1 This is a perspective view illustrating an example of a filter structure according to some embodiments of the present disclosure. Figure 2This is a perspective view illustrating an example of a substrate frame in a filter structure according to some embodiments of the present disclosure. Figure 3 It shows along Figure 1 The image shows a cross-sectional view of an example filter structure according to a first embodiment of the present disclosure, taken by line AA.

[0050] Reference Figures 1 to 3 According to the first embodiment of the present disclosure, the filter structure 101 may include: a base frame 110 having a hollow portion; and a filter portion 120a including a plurality of filters disposed in the base frame 110 to filter foreign matter included in the gas and having different angles relative to the flow direction of the gas.

[0051] The base frame 110 may be configured to support the filter section 120a. In some embodiments, the base frame 110 may include a central frame 111, a first guide frame 112a, a second guide frame 112b, a third guide frame 112c, and a fourth guide frame 112d arranged at regular intervals along the outer periphery of the central frame 111, and support frames extending from both ends (e.g., opposite ends) of the central frame 111 and respectively connected to the ends of the first guide frame 112a to the fourth guide frame 112d.

[0052] In some embodiments, the support frame may include: a first support frame 113a, which connects the two ends of the central frame 111 to the two ends of the first guide frame 112a; a second support frame 113b, which connects the two ends of the central frame 111 to the two ends of the second guide frame 112b; a third support frame 113c, which connects the two ends of the central frame 111 to the two ends of the third guide frame 112c; and a fourth support frame 113d, which connects the two ends of the central frame 111 to the two ends of the fourth guide frame 112d.

[0053] In addition, a reinforcing frame 114 may be included to strengthen the base frame 110. In some embodiments, the reinforcing frame 114 may connect to both ends of each of the first guide frames 112a to the fourth guide frames 112d, respectively. That is, the reinforcing frame 114 may be configured to connect to both ends of the first guide frame 112a, the second guide frame 112b, the third guide frame 112c, and the fourth guide frame 112d, respectively.

[0054] The base frame 110 can be formed into a rectangular column shape through the first guide frame 112a to the fourth guide frame 112d and the reinforcing frame 114, and the central frame 111 can be disposed at the center of the first guide frame 112a to the fourth guide frame 112d through the first support frame 113a to the fourth support frame 113d. Of course, the shape of the base frame 110 can be formed into a polygonal column shape.

[0055] The filter section 120a may be in the form of multiple filters arranged on the first guide frame 112a to the fourth guide frame 112d. (Refer to...) Figure 3 In some embodiments, the filter section 120a may include: a first filter 121, coupled to a first guide frame 112a and a second guide frame 112b; a second filter 122, disposed in a direction perpendicular to the first filter 121 and coupled to the second guide frame 112b and a third guide frame 112c; a third filter 123, configured to face the first filter 121 and coupled to the third guide frame 112c and a fourth guide frame 112d; and a fourth filter 124, configured to face the second filter 122 and coupled to the fourth guide frame 112d and the first guide frame 112a.

[0056] The first filter 121 to the fourth filter 124 can be formed in the shape of a rectangular plate. That is, the first guide frame 112a to the fourth guide frame 112d can correspond to the edge region in the shape of a rectangular column, and the first filter 121 to the fourth filter 124 can correspond to the four surfaces in the shape of a rectangular column.

[0057] Reference Figure 3 In some embodiments, when the gas flows in the D1 direction and is discharged in the D2 direction, the gas can pass through the first filter 121 and the third filter 123, thereby filtering out foreign matter included in the gas.

[0058] When the gas flows in the D1 direction and is discharged in the D4 direction, the gas can pass through the first filter 121 and the second filter 122, thereby filtering out foreign matter included in the gas.

[0059] When the gas flows in the D3 direction and is discharged in the D2 direction, the gas can pass through the fourth filter 124 and the third filter 123, thereby filtering out foreign matter included in the gas.

[0060] When the gas flows in the D3 direction and is discharged in the D4 direction, the gas can pass through the fourth filter 124 and the second filter 122, thereby filtering out foreign matter included in the gas.

[0061] In this way, even if the gas flow direction is constant or changes, the gas passes through multiple filters, allowing foreign objects to be filtered out more effectively.

[0062] The filter section 120a may also include an auxiliary filter 150 (see below) that is incorporated into the first support frame 113a to the fourth support frame 113d. Figure 1That is, the auxiliary filter 150 can be disposed at both ends of the first guide frame 112a to the fourth guide frame 112d. In some embodiments, when gas flows in the Z-axis direction and then in the Z-axis or X-axis direction, the gas can pass through at least one of the first filter 121 to the fourth filter 124, thereby filtering out foreign matter. Furthermore, when gas flows in the Z-axis or X-axis direction and then in the Y-axis direction, the gas can pass through at least one of the first filter 121 to the fourth filter 124 and the auxiliary filter 150, thereby filtering out foreign matter. Therefore, the filter section 120a can be disposed on all six surfaces of the rectangular column-shaped base frame 110 to filter out foreign matter included in the gas.

[0063] The filter section 120a can be formed from a metal filter screen with an aperture size of 40 to 150 mesh. If the aperture size of the filter section 120a is less than 40 mesh, the aperture size becomes larger than the size of the foreign matter to be filtered out, which may lead to the problem that the foreign matter cannot be filtered out effectively. If the aperture size of the filter section 120a exceeds 150 mesh, the aperture size is very small, which may lead to the problem that the filter section 120a is prone to clogging.

[0064] Figure 4 This is a cross-sectional view illustrating an example of a filter structure according to a second embodiment of the present disclosure.

[0065] Reference Figure 4 The filter structure 102 according to the second embodiment of the present disclosure may have a configuration that includes multiple filters in the same configuration as the filter structure 101 according to the first embodiment.

[0066] In some embodiments, the filter section 120b may include: a first filter 121, coupled to a first guide frame 112a and a second guide frame 112b; a second filter 122, disposed in a direction perpendicular to the first filter 121 and coupled to the second guide frame 112b and a third guide frame 112c; a third filter 123, configured to face the first filter 121 and coupled to the third guide frame 112c and a fourth guide frame 112d; and a fourth filter 124, configured to face the second filter 122 and coupled to the fourth guide frame 112d and the first guide frame 112a.

[0067] Additionally, the filter section 120b may also include: a fifth filter 125, which is coupled to the first guide frame 112a and the center frame 111 (e.g., extending from one end to the other); a sixth filter 126, which is coupled to the second guide frame 112b and the center frame 111; a seventh filter 127, which is coupled to the third guide frame 112c and the center frame 111; and an eighth filter 128, which is coupled to the fourth guide frame 112d and the center frame 111.

[0068] The first filters 121 to the eighth filters 128 can be formed in the shape of a rectangular plate. That is, the first guide frame 112a to the fourth guide frame 112d can correspond to the edge region in the shape of a rectangular column, and the first filters 121 to the fourth filters 124 can correspond to the four surfaces in the shape of a rectangular column. In addition, the fifth filters 125 to the eighth filters 128 can be in the shape of a cross connecting the edge regions inside the rectangular column.

[0069] Using this configuration, when the gas flows in the D1 direction and exits in the D2 direction, the gas can pass through the first filter 121, the fifth filter 125, the eighth filter 128, and the third filter 123, thereby filtering out foreign matter included in the gas. Optionally, the gas can pass through the first filter 121, the sixth filter 126, the seventh filter 127, and the third filter 123, thereby filtering out foreign matter included in the gas.

[0070] As gas flows in direction D1 and exits in direction D4, it can pass through the first filter 121, the sixth filter 126, and the second filter 122, thereby filtering out foreign matter contained in the gas. For example, while filters 121 and 122 are perpendicular to the airflow (e.g., at approximately 90 degrees), the sixth filter 126 is at a different angle relative to the airflow (e.g., at approximately 45 degrees). In another example, gas can pass through the first filter 121, the fifth filter 125, the eighth filter 128, the seventh filter 127, and the second filter 122, thereby filtering out foreign matter contained in the gas.

[0071] When the gas flows in the D3 direction and exits in the D2 direction, the gas can pass through the fourth filter 124, the eighth filter 128, and the third filter 123, thereby filtering out foreign matter included in the gas. In another example, the gas can pass through the fourth filter 124, the fifth filter 125, the sixth filter 126, the seventh filter 127, and the third filter 123, thereby filtering out foreign matter included in the gas.

[0072] When the gas flows in the D3 direction and exits in the D4 direction, the gas can pass through the fourth filter 124, the fifth filter 125, the sixth filter 126, and the second filter 122, thereby filtering out foreign matter included in the gas. In another example, the gas can pass through the fourth filter 124, the eighth filter 128, the seventh filter 127, and the second filter 122, thereby filtering out foreign matter included in the gas.

[0073] In this way, even if the gas flow direction is constant or changes, the gas passes through multiple filters, allowing foreign objects to be filtered out more effectively.

[0074] Figure 5 This is a cross-sectional view illustrating an example of a filter structure according to a third embodiment of the present disclosure.

[0075] Reference Figure 5 The filter structure 103 according to the third embodiment of this disclosure may include: a base frame 110 having a hollow portion; and a filter portion 130a including a plurality of filters disposed in the base frame 110. Here, the base frame 110 may have the same construction as the base frame 110 described in the filter structure 101 according to the first embodiment.

[0076] In some embodiments, the filter section 130a may include: a first filter 131, coupled to a first guide frame 112a and a central frame 111; a second filter 132, coupled to a second guide frame 112b and a central frame 111; a third filter 133, coupled to a third guide frame 112c and a central frame 111; and a fourth filter 134, coupled to a fourth guide frame 112d and a central frame 111. That is, the first filter 131 to the fourth filter 134 may be formed in a cross shape.

[0077] Using this configuration, when gas flows in the D1 direction and exits in the D2 direction, the gas can pass through the first filter 131 and the fourth filter 134, thereby filtering out foreign matter included in the gas. In another example, the gas can pass through the second filter 132 and the third filter 133, thereby filtering out foreign matter included in the gas.

[0078] When the gas flows in the D1 direction and exits in the D4 direction, the gas can pass through the second filter 132, thereby filtering out foreign matter included in the gas. In another example, the gas can pass through the first filter 131, the fourth filter 134, and the third filter 133, thereby filtering out foreign matter included in the gas.

[0079] When the gas flows in the D3 direction and exits in the D2 direction, the gas can pass through the fourth filter 134, thereby filtering out foreign matter included in the gas. In another example, the gas can pass through the first filter 131, the second filter 132, and the third filter 133, thereby filtering out foreign matter included in the gas.

[0080] When the gas flows in the D3 direction and exits in the D4 direction, the gas can pass through the first filter 131 and the second filter 132, thereby filtering out foreign matter included in the gas. In another example, the gas can pass through the fourth filter 134 and the third filter 133, thereby filtering out foreign matter included in the gas.

[0081] In this way, even if the gas flow direction is constant or changes, the gas passes through multiple filters, allowing foreign objects to be filtered out more effectively.

[0082] Figure 6 This is a cross-sectional view illustrating an example of a filter structure according to a fourth embodiment of the present disclosure.

[0083] Reference Figure 6 The filter structure 104 according to the fourth embodiment of the present disclosure may have a structure that further includes multiple filters in the same construction as the filter structure 103 according to the third embodiment.

[0084] In some embodiments, the filter section 130b may include: a first filter 131, coupled to a first guide frame 112a and a central frame 111; a second filter 132, coupled to a second guide frame 112b and a central frame 111; a third filter 133, coupled to a third guide frame 112c and a central frame 111; and a fourth filter 134, coupled to a fourth guide frame 112d and a central frame 111. That is, the first filter 131 to the fourth filter 134 may be formed in a cross shape.

[0085] Additionally, the filter section 130b may further include: a fifth filter 135, coupled to the first guide frame 112a and the second guide frame 112b; and a sixth filter 136, configured to face the fifth filter 135, and coupled to the third guide frame 112c and the fourth guide frame 112d. That is, the first filter 131 to the sixth filter 136 may be formed in an hourglass shape.

[0086] Using this configuration, when the gas flows in the D1 direction and exits in the D2 direction, the gas can pass through the fifth filter 135, the first filter 131, the fourth filter 134, and the sixth filter 136, thereby filtering out foreign matter included in the gas. Optionally, the gas can pass through the fifth filter 135, the second filter 132, the third filter 133, and the sixth filter 136, thereby filtering out foreign matter included in the gas.

[0087] When the gas flows in the D1 direction and exits in the D4 direction, the gas can pass through the fifth filter 135 and the second filter 132, thereby filtering out foreign matter included in the gas. Optionally, the gas can pass through the fifth filter 135, the first filter 131, the fourth filter 134 and the third filter 133, thereby filtering out foreign matter included in the gas.

[0088] When the gas flows in the D3 direction and exits in the D2 direction, the gas can pass through the fourth filter 134 and the sixth filter 136, thereby filtering out foreign matter included in the gas. Optionally, the gas can pass through the first filter 131, the second filter 132, the third filter 133, and the sixth filter 136, thereby filtering out foreign matter included in the gas.

[0089] When the gas flows in the D3 direction and exits in the D4 direction, the gas can pass through the first filter 131 and the second filter 132, thereby filtering out foreign matter included in the gas. In another example, the gas can pass through the fourth filter 134 and the third filter 133, thereby filtering out foreign matter included in the gas.

[0090] In this way, even if the gas flow direction is constant or changes, the gas passes through multiple filters, allowing foreign objects to be filtered out more effectively.

[0091] Figure 7 This is a cross-sectional view illustrating an example of a filter structure according to a fifth embodiment of the present disclosure.

[0092] Reference Figure 7 The filter structure 105 according to the fifth embodiment of this disclosure may include: a base frame 110 having a hollow portion; and a filter portion 140a including a plurality of filters disposed in the base frame 110. Here, the base frame 110 may have the same structure as the base frame 110 described in the filter structure 101 according to the first embodiment.

[0093] In some embodiments, the filter section 140a may include: a first filter 141, which is formed in an arc shape and is attached to a first guide frame 112a and a second guide frame 112b; a second filter 142, which is formed in an arc shape, disposed in a direction perpendicular to the first filter 141, and attached to the second guide frame 112b and a third guide frame 112c; a third filter 143, which is formed in an arc shape, positioned facing the first filter 141, and attached to the third guide frame 112c and a fourth guide frame 112d; and a fourth filter 144, which is formed in an arc shape, positioned facing the second filter 142, and attached to the fourth guide frame 112d and the first guide frame 112a.

[0094] In some embodiments, the first filter 141 to the fourth filter 144, which are formed in an arc shape, can be constructed separately and can be respectively incorporated into the first guide frame 112a to the fourth guide frame 112d to be integrally formed into a cylindrical shape. In another example, the first filter 141 to the fourth filter 144 can be integrally formed into a single cylindrical shape.

[0095] With this configuration, when the gas flows in the D1 direction and is discharged in the D2 direction, the gas can pass through the first filter 141 and the third filter 143, thereby filtering out foreign matter included in the gas.

[0096] When the gas flows in the D1 direction and is discharged in the D4 direction, the gas can pass through the first filter 141 and the second filter 142, thereby filtering out foreign matter included in the gas.

[0097] When the gas flows in the D3 direction and is discharged in the D2 direction, the gas can pass through the fourth filter 144 and the third filter 143, thereby filtering out foreign matter included in the gas.

[0098] When the gas flows in the D3 direction and is discharged in the D4 direction, the gas can pass through the fourth filter 144 and the second filter 142, thereby filtering out foreign matter in the gas.

[0099] In this way, even if the gas flow direction is constant or changes, the gas passes through multiple filters, allowing foreign objects to be filtered out more effectively.

[0100] Figure 8 This is a cross-sectional view illustrating an example of a filter structure according to a sixth embodiment of the present disclosure.

[0101] Reference Figure 8The filter structure 106 according to the sixth embodiment of the present disclosure may have a structure that further includes multiple filters in the same construction as the filter structure 105 according to the fifth embodiment.

[0102] In some embodiments, the filter section 140b may include: a first filter 141, which is formed in an arc shape and is coupled to a first guide frame 112a and a second guide frame 112b; a second filter 142, which is formed in an arc shape, disposed in a direction perpendicular to the first filter 141, and coupled to the second guide frame 112b and a third guide frame 112c; a third filter 143, which is formed in an arc shape, configured to face the first filter 141, and coupled to the third guide frame 112c and a fourth guide frame 112d; and a fourth filter 144, which is formed in an arc shape, configured to face the second filter 142, and coupled to the fourth guide frame 112d and the first guide frame 112a.

[0103] Additionally, the filter section 140b may also include: a fifth filter 145, coupled to the first guide frame 112a and the center frame 111; a sixth filter 146, coupled to the second guide frame 112b and the center frame 111; a seventh filter 147, coupled to the third guide frame 112c and the center frame 111; and an eighth filter 148, coupled to the fourth guide frame 112d and the center frame 111.

[0104] The fifth filter 145 to the eighth filter 148 can be formed in the shape of a rectangular plate. That is, the first filter 141 to the fourth filter 144 can be formed in the shape of a cylinder, and the fifth filter 145 to the eighth filter 148 can be arranged in a cross shape inside the cylinder.

[0105] Using this configuration, when gas flows in the D1 direction and exits in the D2 direction, the gas can pass through the first filter 141, the fifth filter 145, the eighth filter 148, and the third filter 143, thereby filtering out foreign matter included in the gas. In another example, the gas can pass through the first filter 141, the sixth filter 146, the seventh filter 147, and the third filter 143, thereby filtering out foreign matter included in the gas.

[0106] When the gas flows in the D1 direction and exits in the D4 direction, the gas can pass through the first filter 141, the sixth filter 146, and the second filter 142, thereby filtering out foreign matter included in the gas. In another example, the gas can pass through the first filter 141, the fifth filter 145, the eighth filter 148, the seventh filter 147, and the second filter 142, thereby filtering out foreign matter included in the gas.

[0107] When the gas flows in the D3 direction and exits in the D2 direction, the gas can pass through the fourth filter 144, the eighth filter 148, and the third filter 143, thereby filtering out foreign matter included in the gas. In another example, the gas can pass through the fourth filter 144, the fifth filter 145, the sixth filter 146, the seventh filter 147, and the third filter 143, thereby filtering out foreign matter included in the gas.

[0108] When the gas flows in the D3 direction and exits in the D4 direction, the gas can pass through the fourth filter 144, the fifth filter 145, the sixth filter 146, and the second filter 142, thereby filtering out foreign matter included in the gas. In another example, the gas can pass through the fourth filter 144, the eighth filter 148, the seventh filter 147, and the second filter 142, thereby filtering out foreign matter included in the gas.

[0109] In this way, even if the gas flow direction is constant or changes, the gas passes through multiple filters, allowing foreign objects to be filtered out more effectively.

[0110] Figure 9 This is a perspective view illustrating an example of a battery pack according to some embodiments of the present disclosure. Figure 10 This is an exploded perspective view illustrating an example of a battery pack according to some embodiments of the present disclosure. Figure 11 It is shown Figure 9 A magnified view of region A.

[0111] Reference Figures 9 to 11 According to some embodiments of the present disclosure, the battery pack 10 may include: a battery module 300 including a plurality of battery cells 310, each having a cell exhaust 311; a housing 200 in which the battery module 300 is housed; a group exhaust 260 disposed on one side of the housing 200 and configured to exhaust gas generated in the battery cells 310 to the outside; and a filter structure 100 disposed in the housing 200 between the battery module 300 and the group exhaust 260 and configured to filter out foreign matter included in the gas.

[0112] In some embodiments, the battery module 300 may include a plurality of battery cells 310 arranged along a first direction (X). The plurality of battery cells 310 are electrically connected to adjacent battery cells via busbars, and a protection circuit module may be connected to the busbars. The protection circuit module may be a battery management system (BMS). The battery modules 300 may be arranged in pairs and side by side along a second direction (Y) that is perpendicular to the first direction (X). That is, a pair of battery modules 300 may be arranged parallel to each other. Of course, although the battery modules 300 are shown as paired in the figures, a single battery module 300 may be housed in the housing 200, or four or more battery modules 300 may be housed.

[0113] The battery cell 310 may include a battery casing and electrode assemblies and electrolyte housed within the battery casing. The electrode assemblies and electrolyte undergo an electrochemical reaction to generate energy. A cell exhaust vent 311, serving as a channel for venting internally generated gases, may be disposed on one surface of the battery cell 310. The cell exhaust vent 311 may be configured such that, in the event of thermal runaway within the battery cell 310, the cell exhaust vent 311 is destroyed due to the increased internal pressure of the battery cell 310, and the gases generated inside the battery cell 310 are released to the outside.

[0114] Multiple battery cells 310 can be arranged along a first direction (X) such that the wide surfaces of the battery cells 310 face each other, and the multiple battery cells 310 arranged therein can be housed in a housing 200. The vent 311 of the battery cells 310 housed in the housing 200 can be configured to be perpendicular to the first direction (X) and face a third direction (Z) that is the direction in which the battery cells 310 are housed in the housing 200.

[0115] The battery casing forms the overall appearance of the battery cell 310 and can be made of a conductive metallic material such as aluminum, aluminum alloy, or nickel-plated steel. The battery casing provides space to house the electrode assembly. The battery casing can be prismatic. Of course, the battery cell 310 can be any shape (such as cylindrical, pouch-shaped, etc.).

[0116] The housing 200 may include: a housing body 210, in which the battery module 300 is housed via an open surface (e.g., a surface), and the housing body 210 includes an end plate 220 disposed perpendicular to the open surface, and an exhaust portion 260 is attached to the end plate 220; a partition 230 attached to the housing body 210 between the end plate 220 and the battery module 300 to form an inflow space 232 into which gas flows and a filter structure 100 is disposed; and a housing cover 240 attached to the open surface of the housing body 210.

[0117] The end plate 220 may be configured to correspond to a side surface of the housing body 210 in the first direction (X). The end plate 220 may include an exhaust port 221, which is formed through the filter structure 100, and gas that has passed through the filter structure 100 is discharged through the exhaust port 221. That is, gas that has flowed into the inflow space 232 formed between the end plate 220 and the partition 230 can be discharged to the outside through the exhaust port 221.

[0118] The group exhaust section 260 may be coupled to the end plate 220 to communicate with the exhaust port 221. The group exhaust section 260 may be coupled to the outer surface of the end plate 220 for placement outside the housing body 210. In some embodiments, the group exhaust section 260 may be configured as a safety valve that opens when the pressure inside the housing 200 is greater than or equal to a certain level and closes when the pressure is less than a certain level. The group exhaust section 260 may also include a filter 261 that filters out foreign matter from the gas discharged through the exhaust port 221.

[0119] The partition 230 may be constructed by integrating it into the housing body 210 between the end plate 220 and the battery module 300 to form an inflow space 232 for gas inflow. The partition 230 may be spaced apart from the end plate 220 in a first direction (X), protrude from the bottom surface of the housing body 210 in a third direction (Z), and extend in a second direction (Y). That is, the partition 230 may be arranged parallel to the end plate 220.

[0120] The partition 230 may also include a flange 231 (see Figure 12 The flange portion 231 protrudes toward the end plate 220, and the filter structure 100 is disposed on the flange portion 231. The flange portion 231 may be formed to protrude from the partition portion 230 in a first direction (X), and may be formed such that the filter structure 100 is positioned facing the exhaust hole 221 formed in the end plate 220.

[0121] The battery pack 10 may also include a guide plate 250. The guide plate 250 may be disposed on the upper part of the battery module 300, including a communication hole 251 communicating with the individual cell exhaust section 311 disposed in the individual cell 310, and guiding the gas discharged from the individual cell exhaust section 311 to the pack exhaust section 260.

[0122] The guide plate 250 can be formed in a length direction in a first direction (X) and a width direction in a second direction (Y). The guide plate 250 can be formed to be elongated along the first direction (X) in which the plurality of battery cells 310 are arranged in the battery module 300. In addition, the guide plate 250 can have a plurality of connecting holes 251 formed along the first direction (X) at positions corresponding to the plurality of cell exhaust portions 311 respectively provided in the plurality of battery cells 310.

[0123] The two ends of the guide plate 250 in the second direction (Y), which is the width direction, can be bent and attached to the housing cover 240. With this configuration, the guide plate 250 and the housing cover 240 can form a flow path for gas to flow in the first direction (X). That is, when gas is discharged through the single-cell exhaust section 311 of the battery cell 310, the gas flows into the space between the guide plate 250 and the housing cover 240 through the connecting hole 251 of the guide plate 250, and the introduced gas can flow in the first direction (X) along the flow path formed by the guide plate 250 and the housing cover 240.

[0124] The guide plate 250 may also include a through hole 252, which communicates with the inflow space 232 so that gas introduced through the through hole 251 flows into the inflow space 232 between the partition 230 and the end plate 220.

[0125] Using this configuration, gas flowing in the first direction (X) along the flow path formed by the guide plate 250 and the outer casing 240 can flow into the inflow space 232 through the through-hole 252 formed in the guide plate 250 when its flow direction changes to the third direction (Z). Then, the gas introduced into the inflow space 232 can be discharged through the exhaust port 221 of the end plate 220 after its flow direction changes back to the first direction (X) inside the filter structure 100. At this time, if the pressure of the gas discharged through the exhaust port 221 is greater than or equal to a certain level, the exhaust section 260 can be opened, allowing the gas to be discharged to the outside of the outer casing 200.

[0126] The filter structure 100 may be a configuration provided in the part between the partition 230 and the end plate 220 where the gas flow direction changes from a third direction (Z) to a first direction (X) to filter out foreign matter included in the gas.

[0127] In some embodiments, the filter structure 100 may include: a base frame 110 having a hollow portion; and a filter portion 120 including a plurality of filters disposed in the base frame 110 to filter out foreign matter included in the gas and having different angles relative to the gas flow direction.

[0128] Reference Figure 2The base frame 110 may be configured to support the filter section 120a. In some embodiments, the base frame 110 may include a central frame 111, a first guide frame 112a, a second guide frame 112b, a third guide frame 112c, and a fourth guide frame 112d arranged at regular intervals along the outer periphery of the central frame 111, and a support frame extending from both ends of the central frame 111 and respectively connected to both ends of the first guide frame 112a to the fourth guide frame 112d.

[0129] Filter structure 100 can be used as a reference Figures 3 to 8 The first embodiment of the filter structure 101 to the sixth embodiment of the filter structure 106 are described. Hereinafter, the state in which one of the first embodiment of the filter structure 101 to the sixth embodiment of the filter structure 106 is disposed in the battery pack 10 will be described in more detail.

[0130] Figure 12 This is a cross-sectional view illustrating an example of a filter structure in a battery pack according to some embodiments of the present disclosure.

[0131] Reference Figure 12 The filter section 120a of the filter structure 101 according to the first embodiment may include: a first filter 121, which is coupled to a first guide frame 112a and a second guide frame 112b; a second filter 122, which is disposed in a direction perpendicular to the first filter 121 and coupled to the second guide frame 112b and a third guide frame 112c; a third filter 123, which is configured to face the first filter 121 and is coupled to the third guide frame 112c and a fourth guide frame 112d; and a fourth filter 124, which is configured to face the second filter 122 and is coupled to the fourth guide frame 112d and the first guide frame 112a.

[0132] The filter structure 101 is provided on the flange portion 231 of the partition portion 230, and gas is introduced toward the flange portion 231 in the third direction (Z), and foreign matter can be filtered out from the gas discharged from the exhaust port 221 toward the end plate 220 in the first direction (X).

[0133] In the gas flowing into the filter structure 101, the first airflow F1 flowing between the reference line RL on a third direction (Z) passing through the central frame 111 and the end plate 220 can pass through the first filter 121 and the second filter 122, thereby filtering out foreign matter included in the gas. The second airflow F2 flowing between the reference line RL and the partition 230 can also pass through the first filter 121 and the second filter 122, thereby filtering out foreign matter included in the gas.

[0134] In this way, even if the gas flow direction changes, the gas passes through multiple filters, allowing foreign objects to be filtered out more effectively.

[0135] Figure 13 This is a cross-sectional view illustrating an example of a filter structure of a second embodiment in a battery pack according to some embodiments of the present disclosure.

[0136] Reference Figure 13 According to the second embodiment, the filter section 120b of the filter structure 102 may include: a first filter 121, which is coupled to a first guide frame 112a and a second guide frame 112b; a second filter 122, which is disposed in a direction perpendicular to the first filter 121 and coupled to the second guide frame 112b and a third guide frame 112c; a third filter 123, which is configured to face the first filter 121 and is coupled to the third guide frame 112c and a fourth guide frame 112d; and a fourth filter 124, which is configured to face the second filter 122 and is coupled to the fourth guide frame 112d and the first guide frame 112a.

[0137] Additionally, the filter section 120b may also include: a fifth filter 125, which is coupled to the first guide frame 112a and the center frame 111; a sixth filter 126, which is coupled to the second guide frame 112b and the center frame 111; a seventh filter 127, which is coupled to the third guide frame 112c and the center frame 111; and an eighth filter 128, which is coupled to the fourth guide frame 112d and the center frame 111.

[0138] The filter structure 102 is provided on the flange 231 of the partition 230, and gas is introduced toward the flange 231 in the third direction (Z), and foreign matter can be filtered out from the gas discharged from the exhaust hole 221 toward the end plate 220 in the first direction (X).

[0139] In the gas flowing into the filter structure 102, the first airflow F1 flowing between the reference line RL on a third direction (Z) passing through the central frame 111 and the end plate 220 can pass through the first filter 121, the sixth filter 126, and the second filter 122, thereby filtering out foreign matter included in the gas. The second airflow F2 flowing between the reference line RL and the partition 230 can pass through the first filter 121, the fifth filter 125, the eighth filter 128, the seventh filter 127, and the second filter 122, thereby filtering out foreign matter included in the gas.

[0140] In this way, even if the gas flow direction changes, the gas passes through multiple filters, allowing foreign objects to be filtered out more effectively.

[0141] Figure 14This is a cross-sectional view illustrating an example of a filter structure in a battery pack according to some embodiments of the present disclosure, representing a third embodiment.

[0142] Reference Figure 14 According to the third embodiment, the filter section 130a of the filter structure 103 may include: a first filter 131, which is coupled to a first guide frame 112a and a central frame 111; a second filter 132, which is coupled to a second guide frame 112b and a central frame 111; a third filter 133, which is coupled to a third guide frame 112c and a central frame 111; and a fourth filter 134, which is coupled to a fourth guide frame 112d and a central frame 111.

[0143] The filter structure 103 is provided on the flange portion 231 of the partition portion 230, and gas is introduced toward the flange portion 231 in the third direction (Z), and foreign matter can be filtered out from the gas discharged from the exhaust port 221 of the end plate 220 in the first direction (X).

[0144] In the gas flowing into the filter structure 103, the first airflow F1 flowing between the reference line RL on the third direction (Z) passing through the central frame 111 and the end plate 220 can pass through the second filter 132, thereby filtering out foreign matter included in the gas. The second airflow F2 flowing between the reference line RL and the partition 230 can pass through the first filter 131, the fourth filter 134 and the third filter 133, thereby filtering out foreign matter included in the gas.

[0145] In this way, even if the gas flow direction changes, the gas passes through multiple filters, allowing foreign objects to be filtered more effectively.

[0146] Figure 15 This is a cross-sectional view illustrating an example of a filter structure in a battery pack according to a fourth embodiment of some embodiments of the present disclosure.

[0147] Reference Figure 15 According to the fourth embodiment, the filter section 130b of the filter structure 104 may include: a first filter 131, coupled to a first guide frame 112a and a central frame 111; a second filter 132, coupled to a second guide frame 112b and a central frame 111; a third filter 133, coupled to a third guide frame 112c and a central frame 111; and a fourth filter 134, coupled to a fourth guide frame 112d and a central frame 111. That is, the first filter 131 to the fourth filter 134 may be formed in a cross shape.

[0148] Additionally, the filter section 130b may further include: a fifth filter 135, coupled to the first guide frame 112a and the second guide frame 112b; and a sixth filter 136, configured to face the fifth filter 135, and coupled to the third guide frame 112c and the fourth guide frame 112d. That is, the first filter 131 to the sixth filter 136 may be formed in an hourglass shape.

[0149] The filter structure 104 is provided on the flange 231 of the partition 230, and gas is introduced toward the flange 231 in the third direction (Z), and foreign matter can be filtered out from the gas discharged from the exhaust hole 221 toward the end plate 220 in the first direction (X).

[0150] In the gas flowing into the filter structure 104, the first airflow F1 flowing between the reference line RL on the third direction (Z) passing through the central frame 111 and the end plate 220 can pass through the fifth filter 135 and the second filter 132, thereby filtering out foreign matter included in the gas. The second airflow F2 flowing between the reference line RL and the partition 230 can pass through the fifth filter 135, the first filter 131, the fourth filter 134 and the third filter 133, thereby filtering out foreign matter included in the gas.

[0151] In this way, even if the gas flow direction changes, the gas passes through multiple filters, allowing foreign objects to be filtered out more effectively.

[0152] Figure 16 This is a cross-sectional view illustrating an example of a filter structure in a battery pack according to a fifth embodiment of some embodiments of the present disclosure.

[0153] Reference Figure 16 According to the fifth embodiment, the filter section 140a of the filter structure 105 may include: a first filter 141, which is formed in an arc shape and is attached to a first guide frame 112a and a second guide frame 112b; a second filter 142, which is formed in an arc shape, is disposed in a direction perpendicular to the first filter 141, and is attached to the second guide frame 112b and a third guide frame 112c; a third filter 143, which is formed in an arc shape, is disposed facing the first filter 141, and is attached to the third guide frame 112c and a fourth guide frame 112d; and a fourth filter 144, which is formed in an arc shape, is disposed facing the second filter 142, and is attached to the fourth guide frame 112d and the first guide frame 112a.

[0154] The filter structure 105 is provided on the flange 231 of the partition 230. Gas is introduced toward the flange 231 in the third direction (Z), and foreign matter can be filtered out from the gas discharged from the exhaust hole 221 toward the end plate 220 in the first direction (X).

[0155] In the gas flowing into the filter structure 105, the first airflow F1 flowing between the reference line RL on the third direction (Z) passing through the central frame 111 and the end plate 220 can pass through the first filter 141 and the second filter 142, thereby filtering out foreign matter included in the gas. The second airflow F2 flowing between the reference line RL and the partition 230 can also pass through the first filter 141 and the second filter 142, thereby filtering out foreign matter included in the gas.

[0156] In this way, even if the gas flow direction changes, the gas passes through multiple filters, allowing foreign objects to be filtered more effectively.

[0157] Figure 17 This is a cross-sectional view illustrating an example of a filter structure in a battery pack according to a sixth embodiment of some embodiments of the present disclosure.

[0158] Reference Figure 17 According to the sixth embodiment, the filter section 140b of the filter structure 106 may include: a first filter 141, which is formed in an arc shape and is attached to a first guide frame 112a and a second guide frame 112b; a second filter 142, which is formed in an arc shape, is disposed in a direction perpendicular to the first filter 141, and is attached to the second guide frame 112b and a third guide frame 112c; a third filter 143, which is formed in an arc shape, is disposed facing the first filter 141, and is attached to the third guide frame 112c and a fourth guide frame 112d; and a fourth filter 144, which is formed in an arc shape, is disposed facing the second filter 142, and is attached to the fourth guide frame 112d and the first guide frame 112a.

[0159] Additionally, the filter section 140b may also include: a fifth filter 145, coupled to the first guide frame 112a and the center frame 111; a sixth filter 146, coupled to the second guide frame 112b and the center frame 111; a seventh filter 147, coupled to the third guide frame 112c and the center frame 111; and an eighth filter 148, coupled to the fourth guide frame 112d and the center frame 111.

[0160] The filter structure 106 is provided on the flange 231 of the partition 230, and the gas flows toward the flange 231 in the third direction (Z), and foreign matter can be filtered out from the gas discharged from the exhaust hole 221 of the end plate 220 in the first direction (X).

[0161] In the gas flowing into the filter structure 106, the first airflow F1 flowing between the reference line RL on a third direction (Z) passing through the central frame 111 and the end plate 220 can pass through the first filter 141, the sixth filter 146, and the second filter 142, thereby filtering out foreign matter included in the gas. The second airflow F2 flowing between the reference line RL and the partition 230 can pass through the first filter 141, the fifth filter 145, the eighth filter 148, the seventh filter 147, and the second filter 142, thereby filtering out foreign matter included in the gas.

[0162] In this way, even if the gas flow direction changes, the gas passes through multiple filters, allowing foreign objects to be filtered out more effectively.

[0163] According to some embodiments of this disclosure, in the filter structure, the filter is set at different angles relative to the gas flow direction, so that foreign matter included in the gas can be effectively filtered out.

[0164] According to some embodiments of this disclosure, the battery pack can prevent flames from being emitted to the outside of the battery pack by utilizing a filter structure to effectively filter out foreign matter from the high-temperature gases generated during thermal runaway.

[0165] Although this disclosure has been described with reference to embodiments and accompanying drawings illustrating aspects of this disclosure, this disclosure is not limited thereto. Various modifications and variations can be made by those skilled in the art to which this disclosure pertains, within the spirit of the disclosure and within the scope of the appended claims and their equivalents.

[0166] Example embodiments have been disclosed herein, and although specific terminology has been used, they are used and will be interpreted in a general and descriptive sense only and not for limiting purposes. In some instances, as will be apparent to those skilled in the art upon filing this application, unless otherwise specifically indicated, features, characteristics, and / or elements described in connection with particular embodiments may be used alone or in combination with features, characteristics, and / or elements described in connection with other embodiments. Therefore, those skilled in the art will understand that various changes in form and detail may be made without departing from the spirit and scope of the invention as set forth in the appended claims.

Claims

1. A filter structure, wherein, The filter structure includes: The matrix framework has a hollow section; and The filter section includes multiple filters within the substrate frame to filter out foreign matter in the gas, the multiple filters having different angles relative to the gas flow direction.

2. The filter structure according to claim 1, wherein, The matrix framework includes: Central framework; The first guide frame, the second guide frame, the third guide frame, and the fourth guide frame are arranged at regular intervals along the circumference of the central frame; and A support frame extends from opposite ends of the central frame and is respectively connected to opposite ends of the first guide frame to the fourth guide frame.

3. The filter structure according to claim 2, wherein, The filter section includes: A first filter is incorporated into the first boot framework and the second boot framework; The second filter, in a direction perpendicular to the first filter, is combined with the second guide frame and the third guide frame; A third filter, facing the first filter, is integrated with the third guide frame and the fourth guide frame; and A fourth filter, facing the second filter, is combined with the fourth guide frame and the first guide frame.

4. The filter structure according to claim 3, wherein, The filter section also includes: The fifth filter is integrated into the first guiding frame and the central frame; A sixth filter is incorporated into the second guiding frame and the central frame; A seventh filter, incorporated into the third guiding frame and the central frame; and The eighth filter is integrated into the fourth guiding frame and the central frame.

5. The filter structure according to claim 2, wherein, The filter section includes: A first filter is incorporated into the first guiding frame and the central frame; A second filter is incorporated into the second guiding frame and the central frame; A third filter is incorporated into the third guiding frame and the central frame; and A fourth filter is incorporated into the fourth guiding frame and the central frame.

6. The filter structure according to claim 5, wherein, The filter section also includes: A fifth filter is incorporated into the first boot frame and the second boot frame; and The sixth filter, facing the fifth filter, is integrated into the third guide frame and the fourth guide frame.

7. The filter structure according to claim 2, wherein, The filter section includes: A first filter has an arc shape and is incorporated into the first guide frame and the second guide frame; The second filter has an arc shape and is perpendicular to the first filter in a direction. The second filter is combined with the second guide frame and the third guide frame. A third filter, having an arcuate shape, faces the first filter and is integrated with the third guide frame and the fourth guide frame; and A fourth filter, having an arc shape, faces the second filter and is integrated into the fourth guide frame and the first guide frame.

8. The filter structure according to claim 7, wherein, The filter section also includes: The fifth filter is integrated into the first guiding frame and the central frame; A sixth filter is incorporated into the second guiding frame and the central frame; A seventh filter, incorporated into the third guiding frame and the central frame; and The eighth filter is integrated into the fourth guiding frame and the central frame.

9. The filter structure according to claim 2, wherein, The filter section also includes an auxiliary filter integrated into the support frame.

10. The filter structure according to claim 2, wherein, The base frame also includes a reinforcing frame, which connects the first guide frame to the opposite ends of the fourth guide frame.

11. The filter structure according to claim 1, wherein, The filter section has an aperture size of 40 to 150 mesh.

12. A battery pack, wherein, The battery pack includes: A battery module includes multiple battery cells, each of which includes a cell exhaust section; The outer casing houses the battery module; A group exhaust section, located on one side of the housing, is configured to exhaust gases generated from the plurality of battery cells to the outside; and A filter structure, located within the housing and between the battery module and the exhaust section, is configured to filter out foreign matter from the gas.

13. The battery pack according to claim 12, wherein, The outer casing includes: The housing body accommodates the battery module through an open surface. The housing body includes an end plate perpendicular to the open surface, and the venting portion is attached to the end plate. A partition, joined to the housing body between the end plate and the battery module, creates an inflow space into which gas flows, and the filter structure is located within the inflow space; and The outer cover is attached to the open surface of the outer casing body.

14. The battery pack according to claim 13, wherein, The battery pack also includes a guide plate on the upper part of the battery module, the guide plate having a communication hole communicating with the individual cell exhaust portion, the guide plate being configured to guide the flow of gas discharged from the individual cell exhaust portion to the group exhaust portion.

15. The battery pack according to claim 14, wherein, The guide plate also includes a through hole that communicates with the inflow space, allowing gas introduced through the through hole to flow into the inflow space.

16. The battery pack according to claim 13, wherein, The partition includes a flange that protrudes toward the end plate side, and the filter structure is located on the flange.

17. The battery pack according to claim 16, wherein: The end plate includes an exhaust port facing the filter structure, through which gas that has passed through the filter structure is discharged. The exhaust section is attached to the end plate to communicate with the exhaust port.

18. The battery pack according to claim 12, wherein, The filter structure includes: The matrix framework has a hollow section; and The filter section includes multiple filters within the substrate frame to filter out foreign matter in the gas, the multiple filters having different angles relative to the gas flow direction.

19. The battery pack according to claim 18, wherein, The matrix framework includes: Central framework; The first guide frame, the second guide frame, the third guide frame, and the fourth guide frame are arranged at regular intervals along the circumference of the central frame; and A support frame extends from opposite ends of the central frame and is respectively connected to opposite ends of the first guide frame to the fourth guide frame.

20. The battery pack according to claim 19, wherein, The filter section includes: A first filter is incorporated into the first boot framework and the second boot framework; A second filter is disposed in a direction perpendicular to the first filter, and the second filter is combined with the second guide frame and the third guide frame; A third filter, configured to face the first filter, is integrated with the third guide frame and the fourth guide frame; and A fourth filter is configured to face the second filter, the fourth filter being combined with the fourth guide frame and the first guide frame.

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