Battery case

Abstract

The present invention provides a battery case including a bottom plate configured to support a battery module, and a side member extending along a periphery of the bottom plate to form a receiving space accommodating the battery module, in which a guide channel is formed in the side member for guiding a fluid generated by the battery module to an outside of the receiving space.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Korean Patent Application No. 10-2023-0146983, filed on October 30, 2023, which is hereby incorporated herein by reference. Technical Field

[0003] The present disclosure relates to a battery casing. Background Art

[0004] In recent years, as people's awareness of environmental crises and the depletion of oil resources continues to increase, research and development of electric vehicles as environmentally friendly vehicles has received attention. Electric vehicles include plug-in hybrid electric vehicles (PHEV), battery electric vehicles (BEV), fuel cell electric vehicles (FCEV), etc.

[0005] Electric vehicles usually include a battery module and a battery housing that supports the battery module. At the same time, electric vehicles use the battery cells of the battery module as a power source. When a fire occurs in the battery module, there is a risk of thermal runaway.

[0006] Therefore, there is a need for an electric vehicle that can reduce heat transfer between battery modules to prevent thermal runaway that occurs when a fire occurs in the battery module. Summary of the invention

[0007] The embodiments of the present disclosure can solve the problems existing in the prior art while retaining the advantages of the prior art.

[0008] Embodiments of the present disclosure provide a battery case for guiding a fluid generated by a battery module to the outside of the battery case.

[0009] The technical problems that can be solved by the embodiments of the present disclosure are not limited to the aforementioned problems, and any other technical problems not mentioned herein will be clearly understood from the following description by those skilled in the art to which the present disclosure belongs.

[0010] According to an embodiment of the present disclosure, a battery housing includes: a base plate that supports a battery module; and a side member that extends along the periphery of the base plate to form a receiving space for accommodating the battery module, and a guide channel is formed in the side member for guiding the fluid generated by the battery module to the outside of the receiving space.

[0011] The side member may include: a guide wall facing the battery module; and a cover wall spaced apart from the guide wall to form the guide passage between the guide wall and the cover wall.

[0012] The guide wall may include a guide hole connected to the guide channel.

[0013] The battery case may further include: a mesh member disposed in the guide hole.

[0014] The guide wall may include a plurality of guide holes, and the guide holes may be spaced apart from each other in a front / rear direction of the battery module.

[0015] The guide wall may be spaced apart from the battery module in a first direction.

[0016] The side member may be disposed on a first side of the battery module in a first direction and may extend in a second direction perpendicular to the first direction, and the battery housing may further include: an end member disposed on a second side of the battery module in the second direction and connected to the side member, and forming a discharge channel connected to the guide channel.

[0017] The battery case may further include an opening / closing portion provided in the end member to form a discharge hole for discharging the fluid flowing through the discharge channel.

[0018] The opening / closing portion may include: a cover grid installed in the end member; and a discharge plate disposed inside the cover grid and forming the discharge hole by pressure of the fluid flowing through the guide channel.

[0019] According to an embodiment of the present disclosure, a battery housing includes: a bottom plate configured to support a battery module; and a side member extending along the periphery of the bottom plate to form a receiving space for accommodating the battery module. The side member includes: a guide channel formed in the side member for guiding the fluid generated by the battery module to the outside of the receiving space; a cover portion including a guide wall and a cover wall, the guide wall facing the receiving space, the cover wall being spaced apart from the guide wall for forming the guide channel between the guide wall and the cover wall; a support portion protruding from the cover portion to the outside of the bottom plate; and a support rib extending from the support portion to the cover portion in an upward direction relative to a direction toward the inside of the bottom plate.

[0020] The cover may include an upper inner wall connecting the guide wall and the cover wall and disposed at an upper side of the guide passage; and a lower inner wall spaced downward from the upper inner wall and disposed at a lower side of the guide passage.

[0021] A first end of the support rib may be connected to the support portion, and a second end of the support rib opposite to the first end may be connected between the upper inner wall and the lower inner wall.

[0022] The support portion may include: an upper support wall connected to the support rib; a lower support wall disposed below the upper support wall; and a first vertical inner wall extending in an up / down direction between a first end connected to the support rib and a second end connected to the lower support wall, the second end being an opposite end to the first end.

[0023] The support portion may further include: a vertical outer wall connecting the upper support wall and the lower support wall; and a second vertical inner wall disposed between the first vertical inner wall and the vertical outer wall and extending in an up / down direction between the upper support wall and the lower support wall.

[0024] The support portion may further include: a first horizontal inner wall connecting the first vertical inner wall and the cover wall; and a second horizontal inner wall connecting the second vertical inner wall and the vertical outer wall.

[0025] According to an embodiment of the present disclosure, a battery pack system includes: a battery module; an upper cover covering the upper surface of the battery module; and a battery housing covering the lower surface and side surfaces of the battery module, wherein the battery housing includes: a bottom plate covering the lower surface of the battery module and configured to support the battery module; and a front member disposed at the front of the bottom plate; a rear member disposed at the rear of the bottom plate; and a side member disposed on the opposite side of the bottom plate and extending along the periphery of the opposite side of the bottom plate to form a receiving space for accommodating the battery module. A guide channel is formed in each side member for guiding the fluid generated by the battery module to the outside of the receiving space.

[0026] Each of the side members may include: a guide wall facing the receiving space; and a cover wall spaced apart from the guide wall for forming the guide passage between the guide wall and the cover wall.

[0027] The guide wall may include a guide hole connected to the guide channel.

[0028] The battery pack system may further include: a mesh member disposed in the guide hole.

[0029] The guide wall may include a plurality of guide holes, and the guide holes may be spaced apart from each other in a front / rear direction of the battery module.

[0030] The guide wall may include a plurality of guide holes, and the plurality of guide holes may be spaced apart from each other in a front / rear direction of the battery module.

[0031] The mesh member may be disposed in the guide hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and other objects, features and advantages of the embodiments of the present disclosure will become more apparent from the following detailed description in conjunction with the accompanying drawings, in which:

[0033] Figure 1 is a perspective view of a battery pack system according to an embodiment of the present disclosure;

[0034] Figure 2 is a plan view of a battery pack system according to an embodiment of the present disclosure with an upper cover omitted;

[0035] Figure 3 is an exploded perspective view of a battery pack system according to an embodiment of the present disclosure;

[0036] Figure 4 is a perspective view of a battery case according to an embodiment of the present disclosure;

[0037] Figure 5 yes Figure 4 A cutaway perspective view of a battery housing shown in FIG.

[0038] Figure 6 is a cross-sectional view of a battery case according to an embodiment of the present disclosure;

[0039] Figure 7 yes Figure 6 An enlarged view of portion A shown in;

[0040] Figure 8 is a schematic diagram showing a state in which a fluid generated by a battery module according to an embodiment of the present disclosure is guided to the outside of a battery case;

[0041] Fig. 9 is an enlarged perspective view of a first opening / closing portion according to an embodiment of the present disclosure;

[0042] Fig.10 yes Fig. 9 A cross-sectional view of the first opening / closing portion shown in ; and

[0043] Fig.11 is a cross-sectional perspective view of a battery case according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0044] Some embodiments of the present disclosure will be described in detail below with reference to the exemplary drawings. When adding reference numbers to the components of each drawing, it should be noted that the same or equivalent components are designated by the same numbers even when shown on other drawings. In addition, when describing the embodiments of the present disclosure, detailed descriptions of well-known features or functions will be omitted so as not to unnecessarily obscure the main points of the present disclosure.

[0045] When describing components according to embodiments of the present disclosure, terms such as first, second, "A", "B", "(a), (b)", etc. may be used. These terms are only used to distinguish one component from another, and these terms do not limit the nature, order, or sequence of the components. Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meanings as those generally understood by those skilled in the art to which the present disclosure belongs. Such terms are defined in general dictionaries and should be interpreted as having the same meanings as in the context of the relevant technical field, and should not be interpreted as having idealized or overly formalized meanings unless explicitly defined in this specification.

[0046] The following will refer to Figures 1 to 11 Embodiments of the present disclosure are described in detail.

[0047] Figure 1 is a perspective view of a battery pack system 1 according to an embodiment of the present disclosure. Figure 2 2 is a plan view in which the upper cover 20 of the battery pack system 1 according to the embodiment of the present disclosure is omitted. Figure 3 is an exploded perspective view of a battery pack system 1 according to an embodiment of the present disclosure.

[0048] Reference Figures 1 to 3 The battery pack system 1 may be understood as a component installed in an electric vehicle. The battery pack system 1 may include a battery module 10 used as a power source for the electric vehicle, an upper cover 20 covering the upper side of the battery module 10, and a battery housing 30 covering the lower side and side of the battery module 10.

[0049] Each battery module 10 may include a plurality of battery cells. The battery cells may be implemented using lithium-ion batteries, but are not limited thereto. The plurality of battery cells may be in the form of a battery module 10, thereby protecting them from external impact, heat, and vibration.

[0050] The upper cover 20 may be disposed on an upper side of the battery module 10 and may cover the upper side of the battery module 10. The upper cover 20 may be coupled with the battery case 30. The upper cover 20 may be coupled with the battery case 30 through the peripheral portion 20a.

[0051] The battery housing 30 may include a base plate 40, which is configured to cover the lower side of the battery module 10 and can support the battery module 10 and end members 51 and 52, the end members 51 and 52 include a front end member 51 arranged on the front side (along the -X direction) of the base plate 40 and a rear end member 52 arranged on the rear side (along the X direction) of the base plate 40.

[0052] The battery case 30 may include side members 70 and 80 disposed on and covering opposite sides of the battery module 10. The side members 70 and 80 may extend in a length direction of the bottom plate 40 and may be connected to the front and rear members 51 and 52.

[0053] The side members 70 and 80 may extend along the periphery of the bottom plate 40 to form a receiving space 31 accommodating the battery module 10 .

[0054] A plurality of battery modules 10 may be respectively accommodated in the receiving spaces 31 .

[0055] The receiving space 31 may be formed by the first connection member 61 , the second connection member 62 , the support member 63 , the front member 64 , the third connection member 65 , the fourth connection member 66 , and the rear member 67 .

[0056] The first connecting member 61, the second connecting member 62, and the supporting member 63 may extend in the length direction (in the X direction) of the battery housing 30. In contrast, the front member 64, the third connecting member 65, the fourth connecting member 66, and the rear member 67 may extend in the left / right direction (in the Y direction) of the battery housing 30 to connect the first side member 70 and the second side member 80.

[0057] The front member 64 may be disposed near the front end member 51 , and may support other modules of the battery pack system 1 disposed between the front member 64 and the front end member 51 .

[0058] In contrast, the rear member 67 may be disposed adjacent to the rear end member 52 , and may support other modules of the battery pack system 1 disposed between the rear member 67 and the rear end member 52 .

[0059] The third connection member 65 and the fourth connection member 66 may be disposed between the front member 64 and the rear member 67. That is, the third connection member 65 may be disposed between the front member 64 and the fourth connection member 66, and the fourth connection member 66 may be disposed between the third connection member 65 and the rear member 67.

[0060] The first connection member 61 , the second connection member 62 , and the support member 63 may connect other modules located in front of or behind the battery housing 30 with the battery module 10 , so that the battery module 10 can be controlled by other modules, and may support the battery module 10 .

[0061] Likewise, the third connection member 65 and the fourth connection member 66 may connect the battery module 10 in the left / right direction (Y direction) and support the battery module 10 .

[0062] At the same time, electric vehicles may be prone to fire. Specifically, when a battery module 10 contained in the battery housing 30 catches fire, due to the structure in which multiple battery cells in each battery module 10 are arranged adjacent to each other, the fluid generated by the fire affects the adjacent battery modules 10 in the battery housing 30, causing multiple battery cells to catch fire continuously, and thermal runaway may occur.

[0063] In order to prevent the thermal runaway phenomenon, a component for guiding high-temperature gas, ie, fluid generated due to a fire in the battery module 10 to the outside of the battery case 30 may be required.

[0064] The above structure will be described in detail below.

[0065] Figure 4 is a perspective view of a battery case 30 according to an embodiment of the present disclosure. Figure 5 yes Figure 4 0 is a cross-sectional perspective view of the battery housing 30 shown in FIG. Figure 6 is a cross-sectional view of a battery case 30 according to an embodiment of the present disclosure. Figure 7 yes Figure 6 An enlarged view of portion A is shown in FIG.

[0066] See also Figures 4 to 7 , the battery case 30 according to the embodiment of the present disclosure may include guide channels 72 and 82 formed in the side members 70 and 80 to guide the fluid generated by the battery module 10 to the outside of the receiving space 31 .

[0067] The guide passages 72 and 82 may be understood as components for releasing high-temperature gas, which may cause heat to be transferred to the adjacent battery modules 10 due to a fire occurring in the battery case 30 , to the outside of the battery case 30 .

[0068] The guide channels 72 and 82 may extend in a first direction (X direction), ie, a length direction of the battery case 30 , and may guide the fluid generated by the battery module 10 in the length direction of the battery case 30 (in the X direction).

[0069] In more detail, the first side member 70 may be disposed on the left side (in the Y direction) of the bottom plate 40, and the second side member 80 may be disposed on the right side (in the -Y direction) of the bottom plate 40. The first side member 70 and the second side member 80 may extend parallel to each other.

[0070] The first side member 70 may include a first cover portion 70 a extending toward the rear of the bottom plate 40 (along the X direction) to cover the battery module 10, and a first support portion 70 b protruding from the first cover portion 70 a toward the left direction (along the Y direction), which is a direction toward the outside of the bottom plate 40.

[0071] The second side member 80 may include a second cover portion 80 a extending toward the rear of the bottom plate 40 (along the X direction) to cover the battery module 10 , and a second support portion 80 b protruding from the second cover portion 80 a in a right direction (−Y direction), which is a direction toward the outside of the bottom plate 40 .

[0072] The first cover portion 70a and the second cover portion 80a may extend facing each other. The first support portion 70b and the second support portion 80b may protrude from the first cover portion 70a and the second cover portion 80a in opposite directions, respectively. The first support portion 70b and the second support portion 80b may be fixedly coupled to a body frame of the electric vehicle.

[0073] The first cover portion 70 a may include a first guide channel 72 formed therein and a first guide hole 71 connected to the first guide channel 72 and introducing the fluid in the battery case 30 into the first guide channel 72 .

[0074] The second cover portion 80 a may include a second guide channel 82 formed therein and a second guide hole 81 connected to the second guide channel 82 and introducing the fluid in the battery case 30 into the second guide channel 82 .

[0075] The first guide hole 71 and the second guide hole 81 may be formed in the first cover portion 70 a and the second cover portion 80 a , respectively, and may be disposed to face each other.

[0076] According to an embodiment of the present disclosure, there may be relatively few restrictions on the shape or number of the guide holes 71 and 81 compared to a case where a guide channel is formed in the first connection member 61 , the second connection member 62 , or the support member 63 .

[0077] The first connection member 61, the second connection member 62, or the support member 63 may extend in the length direction (in the X direction) of the bottom plate 40 to separate the receiving spaces 31 from each other in the left / right direction, and may be required to support the battery module 10. The height of the first connection member 61, the second connection member 62, or the support member 63 may be set to be about 20 mm lower than the height of the side members 70 and 80.

[0078] If a guide hole is formed in the first connecting member 61, the second connecting member 62, or the supporting member 63, the force with which the first connecting member 61, the second connecting member 62, or the supporting member 63 supports the battery module 10 may be reduced, and thus may not stably support the battery module 10. In the case of the supporting member 63, the width in the left / right direction may be relatively narrow, and thus there may be a limitation in forming the guide hole.

[0079] In contrast, according to the structure of the side members 70 and 80 of the embodiment of the present disclosure, the guide holes 71 and 81 may be formed in the cover parts 70a and 80a of the side members 70 and 80, and the guide channels 72 and 82 connected to the guide holes 71 and 81 may be formed in the cover parts 70a and 80a. Therefore, the battery housing 30 according to the embodiment of the present disclosure may support the battery module 10 more stably. The size of the guide holes 71 and 81 may be made relatively large, and the number of the guide holes 71 and 81 may also be increased. Therefore, heat transfer between the battery modules 10 may be more effectively prevented.

[0080] The first side member 70 may be disposed on the left side (along the Y direction) of the battery module 10, and the second side member 80 may be disposed on the right side (along the -Y direction) of the battery module 10. The first side member 70 and the second side member 80 may be connected to the front end member 51 in the front direction (-X direction). The first side member 70 and the second side member 80 may be connected to the rear end member 52 in the rear direction (X direction).

[0081] In other words, the side members 70 and 80 may be disposed on the left and right sides of the battery module 10 and may extend in a front / rear direction perpendicular to the left / right direction, while the end members 51 and 52 may be disposed on opposite sides of the battery module 10 in the front / rear direction and may be connected to the side members 70 and 80.

[0082] The end members 51 and 52 may form a discharge passage 51ba connected to the guide passages 72 and 82. The end members 51 and 52 may include a front end member 51 disposed at the front side (in the -X direction) of the side members 70 and 80 and a rear end member 52 disposed at the rear side (in the X direction) of the side members 70 and 80.

[0083] The front end member 51 may be formed with a first opening / closing portion 53 through which the high temperature gas flowing through the first guide passage 72 is discharged to the outside of the battery case 30 .

[0084] Likewise, the rear end member 52 may be formed with a second opening / closing portion 54 through which the high temperature gas flowing through the second guide passage 82 is discharged to the outside of the battery case 30. The structures of the first opening / closing portion 53 and the second opening / closing portion 54 will be described below.

[0085] The following describes only the second cover 80a and the second support 80b. The structures of the first cover 70a and the first support 70b may correspond to those of the second cover 80a and the second support 80b, and the first cover 70a and the first support 70b may be symmetrically arranged with the second cover 80a and the second support 80b.

[0086] The second cover portion 80 a may include a guide wall 83 facing the battery module 10 and a cover wall 84 spaced apart from the guide wall 83 and forming a second guide passage 82 therebetween.

[0087] The second guide hole 81 may be formed in the guide wall 83, and may introduce the high temperature gas generated by the battery module 10 into the second guide channel 82. Meanwhile, a plurality of the second guide holes 81 may be provided along the battery module 10 and spaced apart from each other. In other words, a plurality of the second guide holes 81 may be provided in the length direction (along the X direction) of the guide wall 83 and spaced apart from each other.

[0088] For example, the battery module 10 may be disposed in the receiving space 31 partitioned from one another by the first connection member 61 , the second connection member 62 , the support member 63 , the front member 64 , the third connection member 65 , the fourth connection member 66 , and the rear member 67 .

[0089] Due to this structure, even if a fire occurs at any position in the battery module 10 , high-temperature gas generated by the fire can be guided to the outside of the battery case 30 , thereby effectively preventing heat from being transferred to adjacent battery modules 10 .

[0090] like Figure 7 As shown, the second cover portion 80a of the second side member 80 may include a guide wall 83 and a cover wall 84. The guide wall 83 and the cover wall 84 may extend parallel to each other in a direction perpendicular to the bottom plate 40.

[0091] The second cover portion 80a may include an upper outer wall 80aa coupled with the upper cover 20 and a lower outer wall 80ab coupled with the bottom plate 40. The upper outer wall 80aa and the lower outer wall 80ab may extend parallel to each other.

[0092] The second cover portion 80a may include an upper inner wall 85 disposed at an upper side of the second guide passage 82 and a lower inner wall 86 disposed at a lower side of the second guide passage 82. The upper inner wall 85 and the lower inner wall 86 connect the guide wall 83 and the cover wall 84 and may be spaced apart from each other in the up / down direction to form the second guide passage 82 therebetween.

[0093] The vertical distance h between the upper inner wall 85 and the lower inner wall 86 may be about 40 mm. Under the constraint of maintaining the rigidity of the second cover portion 80a, the vertical distance h between the upper inner wall 85 and the lower inner wall 86 may be a preferred length of the cross section of the guide hole 81 in the up / down direction.

[0094] The second cover portion 80a may include a first horizontal inner wall 84a disposed between the lower inner wall 86 and the lower outer wall 80ab. The upper inner wall 85, the lower inner wall 86, and the first horizontal inner wall 84a may improve the rigidity of the second cover portion 80a.

[0095] At the same time, since the second cover 80a and the second support portion 80b extend in mutually perpendicular directions, the force by which the second cover 80a and the second support portion 80b support each other may be relatively weak. In order to solve this problem, the second side member 80 may include a support rib 87, which connects the second support portion 80b and the second cover 80a so that the second cover 80a and the second support portion 80b support each other. The second side member 80 may also include a support rib 87, which extends from the second support portion 80b to the second cover 80a in a direction upward relative to the direction toward the inside of the base plate 40.

[0096] Specifically, the support rib 87 may extend toward the second guide channel 82 disposed inside the second cover portion 80a. The support rib 87 may include one end connected to the second support portion 80b and an opposite end connected between the upper inner wall 85 and the lower inner wall 86.

[0097] According to this structure, the support rib 87 can improve the rigidity of the second cover 80a and the second support 80b by connecting the second cover 80a and the second support 80b. In more detail, in the structure provided with the second guide channel 82, the support rib 87 can increase the rigidity of the part of the second cover 80a with relatively low rigidity.

[0098] The second support portion 80b may include a vertical outer wall 80bc disposed at the outermost side of the bottom plate 40 and extending in the up / down direction, an upper support wall 80ba connecting the upper end of the vertical outer wall 80bc and the second cover portion 80a, and a lower support wall 80bb connecting the lower end of the vertical outer wall 80bc and the second cover portion 80a.

[0099] The upper support wall 80ba and the lower support wall 80bb may extend parallel to each other from the second cover portion 80a toward the outside of the bottom plate 40. The vertical outer wall 80bc may connect the upper support wall 80ba and the lower support wall 80bb and may extend in the up / down direction.

[0100] The upper support wall 80ba may be connected to the support rib 87. In other words, the support rib 87 may extend obliquely from the upper support wall 80ba toward the cover wall 84. A lower support wall 80bb parallel to the upper support wall 80ba may be provided below the upper support wall 80ba.

[0101] The second support portion 80b may include vertical inner walls 88 and 89 disposed between the upper support wall 80ba and the lower support wall 80bb. The vertical inner walls 88 and 89 may include a first vertical inner wall 88 extending in the up / down direction between one end connected to the support rib 87 and the other end connected to the lower support wall 80bb, and a second vertical inner wall 89 extending in the up / down direction between the first vertical inner wall 88 and the vertical outer wall 80bc. The first vertical inner wall 88 and the second vertical inner wall 89 may increase the rigidity of the second support portion 80b.

[0102] The second support portion 80 b may include a first horizontal inner wall 84 b located between the upper support wall 80 ba and the lower support wall 80 bb and extending from the first vertical inner wall 88 to the cover wall 84 .

[0103] The second support portion 80b may include a second horizontal inner wall 89a located between the upper support wall 80ba and the lower support wall 80bb and extending from the second vertical inner wall 89 to the vertical outer wall 80bc.

[0104] Since the second horizontal inner wall 89 a is disposed in the region A4 between the second vertical inner wall 89 and the vertical outer wall 80 bc , the region A4 may have higher rigidity than the region A3 between the first vertical inner wall 88 and the second vertical inner wall 89 .

[0105] Therefore, the region A4 between the second vertical inner wall 89 and the vertical outer wall 80bc is a region for preventing bending due to an impact occurring on one side of the electric vehicle.

[0106] In contrast, the region A3 between the first vertical inner wall 88 and the second vertical inner wall 89 is a region for absorbing the impact occurring on one side of the electric vehicle.

[0107] The area A2 between the first vertical inner wall 88 and the guide wall 83 may be understood as an area for preventing the support rib 87 from bending when an impact occurs on one side of the electric vehicle due to the structure of the support rib 87 .

[0108] Meanwhile, the guide wall 83 may be spaced apart from the battery module 10 in the left / right direction. In more detail, the guide wall 83 may be spaced apart from the end plates 11 disposed at opposite side ends of the battery module 10 .

[0109] The guide wall 83 may be spaced apart from the end plate 11 of the battery module 10 by a spacing distance S of about 15 mm. The area A1 between the guide wall 83 and the end plate 11 of the battery module 10 may absorb an impact occurring on one side of the electric vehicle and prevent the impact from being transmitted into the battery module 10 due to the spacing distance S between the guide wall 83 and the battery module 10.

[0110] Furthermore, since the guide wall 83 is spaced apart from the battery module 10 , high temperature gas generated by the battery module 10 may be more smoothly introduced into the second guide passage 82 , and high temperature gas within the battery case 30 may be more smoothly discharged to the outside of the battery case 30 .

[0111] However, the embodiments of the present disclosure are not limited thereto as long as it is clearly understood that the guide wall 83 and the battery module 10 are spaced apart from each other.

[0112] The area A2 between the guide wall 83 and the first vertical inner wall 88 may be an area for preventing the cover portion 80 a and the support portion 80 b from being bent due to the support rib 87 when an impact occurs on one side of the electric vehicle.

[0113] Figure 8 is a schematic diagram illustrating a state in which a fluid generated by the battery module 10 according to an embodiment of the present disclosure is guided to the outside of the battery case 30 .

[0114] Below, we will refer to Figure 8 The principle that high-temperature gas generated by a fire in the battery module 10 is discharged to the outside of the battery case 30 is described in detail.

[0115] When a fire occurs in the battery module 10 , high-temperature gas may be introduced into the guide passages 72 and 82 provided in the side members 70 and 80 on the opposite sides of the battery module 10 due to pressure generated by the fire.

[0116] The high-temperature gas generated by a fire in the battery module 10 may be guided into the first guide channel 72 of the first side member 70 arranged on the left side of the battery module 10 (along the -Y direction), or guided into the second guide channel 82 of the second side member 80 arranged on the right side of the battery module 10 (along the Y direction).

[0117] The high-temperature gas introduced into the guide passages 72 and 82 may be guided in the length direction of the battery case 30 (in the X direction) along the guide passages 72 and 82 .

[0118] In other words, the high temperature gas introduced into the first guide passage 72 may be guided in the forward direction (−X direction) along the first guide passage 72 , and may be discharged to the outside of the battery case 30 through the first opening / closing portion 53 .

[0119] Furthermore, the high-temperature gas introduced into the second guide passage 82 may be guided in the rearward direction (X direction) along the second guide passage 82 , and may be discharged to the outside of the battery case 30 through the second opening / closing portion 54 .

[0120] However, unlike what is shown in the figure, the positions of the first opening / closing portion 53 and the second opening / closing portion 54 are not restricted, and the first opening / closing portion 53 and the second opening / closing portion 54 can be located at a position connected to the guide channels 72 and 82, so that the high-temperature gas flowing through the first guide channel 72 and the second guide channel 82 is discharged to the outside of the battery housing 30.

[0121] Reference Fig. 9 and Fig.10 The first opening / closing portion 53 is described. The structure of the second opening / closing portion 54 can also be understood accordingly.

[0122] Fig. 9is an enlarged perspective view of the first opening / closing portion 53 according to an embodiment of the present disclosure. Fig.10 yes Fig. 9 A cross-sectional view of the first opening / closing portion 53 is shown in FIG.

[0123] Reference Fig. 9 and Fig.10 The first opening / closing portion 53 may be provided on the front portion 51 a facing forward (−X direction) or the inclined portion 51 b connecting the front portion 51 a and the first side member 70 .

[0124] The inclined portion 51b may extend from the front portion 51a from the first side member 70. The first opening / closing portion 53 may be provided on the inclined portion 51b.

[0125] The first guide passage 72 provided in the first cover portion 70 a and extending in the front (X direction) may be connected to the discharge passage 51 ba formed by the front end member 51 .

[0126] The first opening / closing portion 53 may have a discharge hole 53 c through which the fluid flowing through the discharge passage 51 ba is discharged.

[0127] In more detail, the first opening / closing portion 53 may include a cover grid 53 a installed in the inclined portion 51 b of the front end member 51 and a discharge plate 53 b provided at an inner side of the cover grid 53 a .

[0128] The discharge plate 53b may be disposed inside the inclined portion 51b and may be formed of aluminum (Al).

[0129] Before a fire occurs in the battery module 10, the discharge plate 53b may not form the discharge hole 53c. However, when a fire occurs in the battery module 10, the discharge plate 53b may be broken by the pressure of the high temperature gas flowing through the first guide passage 72, thereby forming the discharge hole 53c.

[0130] That is, Fig.10 As shown, the high temperature gas flowing through the first guide passage 72 may flow through the exhaust passage 51 ba, may break the exhaust plate 53 b, and may be exhausted to the outside of the battery case 30 while separating the cover grid 53 a in the up / down direction.

[0131] Due to this structure, when a fire occurs in the battery module 10 within the battery case 30 according to the embodiment of the present disclosure, high-temperature and high-pressure gas can be discharged to the outside of the battery case 30 through the guide channels 72 and 82, thereby preventing heat transfer between the battery modules 10. Therefore, thermal runaway of the battery module 10 can be relatively reduced.

[0132] Fig.11 is a cross-sectional perspective view of a battery case 30 according to another embodiment of the present disclosure.

[0133] See also Fig.11 , available in Figure 4 and Figure 5 The mesh member 181 is provided in the guide holes 71 and 81 formed in the side members 70 and 80 of the battery case 30 shown.

[0134] The mesh member 181 may be disposed in the guide holes 71 and 81 and may be formed in the guide wall 83 of the cover parts 70a and 80a. The mesh member 181 may cover the plurality of guide holes 71 and 81, respectively.

[0135] Due to the presence of the mesh member 181 , even if a fire occurs in the battery module 10 , only the high-temperature gas generated by the fire is discharged to the outside of the battery housing 30 through the guide holes 71 and 81 , while flames or other particles are not discharged to the outside of the battery housing 30 .

[0136] That is, it is possible to prevent heat transfer between the battery modules 10 and prevent flames from being exposed to the outside of the electric vehicle. Therefore, it is possible to improve the safety of the electric vehicle.

[0137] According to the embodiments of the present disclosure, the fluid generated by one battery module can be guided to the outside of the battery case. Therefore, when a fire occurs in the battery module, heat can be prevented from being transferred to adjacent battery modules, thereby preventing thermal runaway.

[0138] Furthermore, since the guide passage is formed in the side member of the battery case, the shape of the guide hole connected to the guide passage can be more freely formed, so that productivity can be improved.

[0139] Furthermore, since the mesh member is provided in the guide hole formed in the side member, it is possible to prevent the heat conductive material or flame from being exposed to the outside of the battery case.

[0140] Furthermore, the embodiments of the present disclosure can provide various effects that can be directly or indirectly realized.

[0141] Although the embodiments of the present disclosure have been described above with reference to exemplary embodiments and the accompanying drawings, the embodiments of the present disclosure are not limited thereto, but various modifications and changes may be made thereto by those skilled in the art without departing from the spirit and scope of the present disclosure as claimed in the appended claims.

[0142] Therefore, the exemplary embodiments of the present disclosure are provided to explain the spirit and scope of the present disclosure, rather than to limit the spirit and scope of the present disclosure, and therefore the spirit and scope of the present disclosure are not limited by the embodiments. The scope of the present disclosure should be interpreted based on the attached claims, and all technical ideas within the scope equivalent to the claims should be included within the scope of the present disclosure.

Claims

1. A battery housing, in, include: a base plate configured to support a battery module; as well as A side member extends along a periphery of the bottom plate to form a receiving space for accommodating the battery module, and a guide channel is formed in the side member to guide a fluid generated by the battery module to the outside of the receiving space.

2. The battery casing according to claim 1, wherein: The side member comprises: a guide wall facing the receiving space; and A cover wall is spaced apart from the guide wall and is used to form the guide passage between the guide wall and the cover wall.

3. The battery case according to claim 2, wherein: The guide wall includes a guide hole connected to the guide channel.

4. The battery casing according to claim 3, wherein: Also includes: A mesh member is disposed in the guide hole.

5. The battery case according to claim 2, wherein: The guide wall includes a plurality of guide holes, and the guide holes are spaced apart from each other in a front / rear direction of the battery module.

6. The battery case according to claim 2, wherein: The guide wall is spaced apart from the battery module in a first direction.

7. The battery case according to claim 1, wherein: The side member is disposed on a first side of the battery module in a first direction and extends in a second direction perpendicular to the first direction; and The battery case further includes an end member disposed at a second side of the battery module in the second direction and connected to the side member, the end member forming a discharge passage connected to the guide passage.

8. The battery case according to claim 7, wherein: Also included is an opening / closing portion provided in the end member to form a discharge hole for discharging the fluid flowing through the discharge passage.

9. The battery casing according to claim 8, wherein: The opening / closing section comprises: a cover grid mounted in the end member; and A discharge plate is provided inside the cover grid and forms the discharge hole by the pressure of the fluid flowing through the guide channel.

10. A battery casing, in, include: a base plate configured to support the battery module; and a side member extending along the periphery of the bottom plate to form a receiving space for accommodating the battery module, the side member comprising: a guide channel formed in the side member for guiding a fluid generated by the battery module to the outside of the receiving space; a cover portion, comprising a guide wall and a cover wall, the guide wall facing the receiving space, the cover wall being spaced apart from the guide wall for forming the guide passage between the guide wall and the cover wall; a support portion protruding from the cover portion toward an outer side of the bottom plate; and A support rib extends from the support portion toward the cover portion in an upward direction relative to a direction toward the inner side of the bottom plate.

11. The battery casing according to claim 10, wherein: The cover portion comprises: an upper inner wall connecting the guide wall and the cover wall and disposed on an upper side of the guide channel; and A lower inner wall is spaced downward from the upper inner wall and is disposed at a lower side of the guide passage.

12. The battery casing according to claim 11, wherein: A first end of the support rib is connected to the support portion, and a second end of the support rib opposite to the first end is connected between the upper inner wall and the lower inner wall.

13. The battery casing according to claim 10, wherein: The support portion comprises: an upper support wall connected to the support ribs; a lower supporting wall disposed below the upper supporting wall; and A first vertical inner wall extends in an up / down direction between a first end connected to the support rib and a second end connected to the lower support wall, the second end being an opposite end to the first end.

14. The battery casing according to claim 13, wherein: The support portion further comprises: a vertical outer wall connecting the upper supporting wall and the lower supporting wall; and A second vertical inner wall is disposed between the first vertical inner wall and the vertical outer wall and extends in an up / down direction between the upper supporting wall and the lower supporting wall.

15. The battery casing according to claim 14, wherein: The support portion further comprises: a first horizontal inner wall connecting the first vertical inner wall and the cover wall; and A second horizontal inner wall connects the second vertical inner wall and the vertical outer wall.

16. A battery pack system, in, include: Battery modules; an upper cover covering an upper surface of the battery module; and A battery housing, which covers the lower surface and side surfaces of the battery module, and the battery housing comprises: a bottom plate covering a lower surface of the battery module and configured to support the battery module; and A front end member disposed at the front portion of the base plate; a rear end member disposed at the rear of the base plate; and A side member is disposed on the opposite side of the bottom plate and extends along the periphery of the opposite side of the bottom plate to form a receiving space for accommodating the battery module, and a guide channel is formed in each side member for guiding the fluid generated by the battery module to the outside of the receiving space.

17. The battery pack system according to claim 16, wherein: Each side member comprises: a guide wall facing the receiving space; and A cover wall is spaced apart from the guide wall and is used to form the guide passage between the guide wall and the cover wall.

18. The battery pack system according to claim 17, wherein: The guide wall includes a guide hole connected to the guide channel.

19. The battery pack system according to claim 18, wherein: Also includes: A mesh member is disposed in the guide hole.

20. The battery pack system according to claim 17, wherein: The guide wall includes a plurality of guide holes, and the guide holes are spaced apart from each other in a front / rear direction of the battery module.

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