Battery housing and battery pack

Abstract

Battery housing (20), comprising: a gas guide device (200, 300, 400, 500) with a first and a second plate (201, 202, 301, 302, 401, 402, 501, 502) spaced apart from each other by a space (205, 305) between them; and a housing (100) in which a battery module (30) and the gas guidance device (200, 300, 400, 500) are housed, wherein an opening section (203, 303, 403) is provided to pass through the first plate (201, 301, 401, 501) and is connected to the space (205, 305), a guide section (204, 304) projecting towards the opening section (203, 303, 403) is provided on the second plate (202, 302, 402, 502), and the gas guidance device (200, 300, 400, 500) is arranged such that the opening section (203, 303, 403) is aligned towards the battery module (30).

Description

BACKGROUND 1. Field of the invention

[0001] The present disclosure relates to a battery housing and a battery pack. 2. Discussion of the state of the art

[0002] Secondary batteries are energy storage devices that can be charged and discharged through electrochemical reactions. They can be used in various applications involving electrical energy. For example, secondary batteries are widely used in mobile devices such as cell phones, laptops, and tablets, and their wider use is being pursued in transportation applications like cars, airplanes, and ships. Furthermore, the demand for secondary batteries is increasing in the field of energy storage systems (ESSs) for utilizing surplus power.

[0003] Secondary batteries can be provided in several combinations according to the voltages, currents, etc., required by the loads. That is, the secondary battery can be provided as a single unit battery cell, and multiple battery cells can be combined to provide a single battery pack. In some cases, battery cells can be combined into intermediate units such as battery modules, and multiple battery modules can be combined to provide a single battery pack. SUMMARY

[0004] The present disclosure relates to a battery housing and a battery pack.

[0005] In some embodiments, a high-temperature and high-pressure gas generated in a battery cell can be guided along a discharge path.

[0006] In some designs, flame backflow can be prevented.

[0007] In some embodiments, it is possible to prevent foreign materials, such as conductive particles, from being discharged to the outside.

[0008] In some designs, the stability of the battery pack can be improved.

[0009] In some embodiments, the rigidity of the battery pack can be improved.

[0010] Some embodiments of the present disclosure can be widely applied in fields of green technology, such as solar and wind power generation using batteries, in addition to electric vehicles and battery charging stations. Furthermore, some embodiments of the present disclosure can be used in environmentally friendly electric and hybrid vehicles to prevent climate change by suppressing air pollution and greenhouse gas emissions.

[0011] According to some embodiments of the present disclosure, a battery housing is provided comprising a gas guide device with a first and a second plate spaced apart from each other by a space between them, and a housing in which a battery module and the gas guide device are accommodated, wherein an opening section is provided to pass through the first plate and is connected to the space, a guide section projecting towards the opening section is provided on the second plate, and the gas guide device is arranged such that the opening section is oriented towards the battery module.

[0012] In some embodiments, the housing may comprise a first cover in which the battery module is housed and which is open on one side, and a second cover in which the gas guide device is housed and which is coupled to the open side of the first cover.

[0013] In some embodiments, the second cover may include a lower cover on which the second plate is supported.

[0014] In some embodiments, the gas guide device can be coupled to the housing using an adhesive.

[0015] In some embodiments, the gas guide device can be coupled to the housing by screwing it on.

[0016] In some embodiments, the second cover may further comprise an upper cover, and the gas guidance device may be located between the upper cover and the lower cover.

[0017] In some embodiments, the upper cover may be provided with a communication hole configured to communicate with the opening section of the gas guidance device.

[0018] In some embodiments, the opening section and the guide section can be provided at the centers of the first plate and the second plate in the width direction.

[0019] In some embodiments, the guide section may protrude in such a way that both surfaces are inclined in a lateral direction.

[0020] In some embodiments, the gas guiding device may further include a covering element that covers a surface of the guide section.

[0021] In some embodiments, the gas guiding device may further comprise a first mesh that covers an opening section.

[0022] In some embodiments, the gas guiding device may further comprise a support whose inner surface faces the room and which connects the first plate and the second plate.

[0023] In some embodiments, a first through-hole may be provided to pass through the inner surface and an outer surface of the support.

[0024] In some embodiments, the gas guiding device may further comprise a second mesh that covers the first through-hole.

[0025] In some embodiments, the gas guiding device may further comprise a first mesh covering the opening section, a first through-hole which may be provided to have an inner surface facing the space, to connect the first plate and the second plate and to pass through an inner surface and an outer surface of the support, and a second mesh covering the first through-hole, and a hole in the second mesh may be smaller than a hole in the first mesh.

[0026] In some embodiments, the gas guiding device may include a reinforcement that connects the first plate and the second plate on an inner side instead of the support.

[0027] In some embodiments, a second through-hole may be provided to pass through an inner surface and an outer surface of the reinforcement.

[0028] In some embodiments, a first rib projecting towards the second plate may be provided on the first plate.

[0029] In some embodiments, a second rib projecting towards the first plate may be provided on the second plate.

[0030] Meanwhile, according to one embodiment of the present disclosure, a battery pack comprising a battery housing and a battery module comprising the same may be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and other tasks, features and advantages of the present disclosure will become clearer to the person skilled in the art by describing exemplary embodiments thereof in detail with reference to the accompanying drawings, wherein: Fig. 1 is a perspective view representing a battery pack according to an embodiment of the present disclosure; Fig. 2 is a perspective exploded view that shows the in Fig. 1 shows the battery pack; Fig. 3 a schematic cross-sectional view along the in Fig. Line AA shown in 1 is; Fig. 4 a schematic cross-sectional view along the in Fig. Line BB shown in 1 is; Fig. 5 a schematic cross-sectional view along the in Fig. Line CC shown in 1 is; Fig. 6 is a perspective view showing a battery pack according to another embodiment of the present disclosure; Fig. Figure 7 shows a cross-sectional view showing a gas guidance device and a guide element of Fig. 6 represents; Fig. 8 is a perspective exploded view showing a battery pack according to another embodiment of the present disclosure; Fig. 9 is a first cross-sectional view, which shows the in Fig. 8 shows the battery pack; Fig. 10 is a second cross-sectional view, which shows the in Fig. 8 shows the battery pack; Fig. 11 is a perspective view showing the gas guidance device according to an embodiment of the present disclosure; Fig. Figure 12 shows a cross-sectional view of the gas guide device. Fig. 11 represents; Fig. 13 is a cross-sectional view showing a gas guidance device according to another embodiment of the present disclosure; Fig. 14 is a perspective view showing a gas guidance device according to yet another embodiment of the present disclosure; Fig. 15 is a perspective view showing a gas guidance device according to yet another embodiment of the present disclosure; Fig. 16 is a perspective view showing a gas guidance device according to yet another embodiment of the present disclosure; and Fig. 17 is a perspective view showing a gas guidance device according to yet another embodiment of the present disclosure. DETAILED DESCRIPTION OF EXAMPLE EXECUTIONS

[0032] The present disclosure is described in detail below with reference to the accompanying drawings. However, this is merely an example and the present disclosure is not limited to specific embodiments described as examples.

[0033] Fig. Figure 1 is a perspective view showing a battery pack according to an embodiment of the present disclosure.

[0034] With reference to Fig. 1. The battery pack 10 can include a battery housing 20. The battery housing 20 comprises a casing 100, which has a predetermined receiving space, and a battery module 30 can be housed inside the casing 100 (see Fig. 2) That is, according to the present disclosure, the battery pack 10, which comprises the battery housing 20 and the battery module 30 housed in the casing 100, can be provided.

[0035] Meanwhile, in the illustrated embodiment, the battery housing 20 is shown to have a substantially flat rectangular shape. However, the external shape of the battery housing 20 can be modified in some cases and is not necessarily limited to the example shown.

[0036] Fig. 2 is a perspective exploded view showing the in Fig. 1 shows the battery pack.

[0037] With reference to Fig. According to the present disclosure, the battery housing 20 comprises a gas guide device 200 with a first and a second plate 201 and 202, which are arranged such that they are spaced apart from each other by a space 205 between them, the battery module 30 and the housing 100 in which the gas guide device 200 is housed, wherein the first plate 201 is provided with an opening section 203 which is connected to the space 205 and is provided to extend through it, the second plate 202 is provided with a guide section 204 which projects towards the opening section 203, and the gas guide device 200 is arranged such that the opening section 203 is oriented towards the battery module 30.

[0038] The battery module 30 can comprise a plurality of battery cells 31 and the housing that accommodates the battery cells 31. The battery cell 31 can have a cylindrical, prismatic, or pouch shape, and the shape of the battery cell 31 is not limited by the present disclosure.

[0039] The housing 100 can accommodate the battery module 30 and the gas guide device 200. The housing 100 can comprise a first cover 110 and a second cover 120; the first cover 110 can include a first compartment 101 in which the battery module 30 is housed, and the second cover 120 can include a second compartment 102 in which the gas guide device 200 is housed (see Fig. 4 and Fig. 5) In the battery module 30, a vent hole through which a gas generated during the thermal runaway of the battery cell is discharged can be arranged such that it faces the opening section 203 of the gas guide device 200. The drawings show an embodiment in which the vent hole is provided on a lower surface of the battery cell and the gas guide device 200 is arranged such that the opening section 203 faces a lower surface of the battery module 30 on a lower side of the battery module 30.

[0040] A heat-resistant element 140 can be provided on one side of the battery module 30 where the vent hole is located. The heat-resistant element 140 can be, for example, a mica sheet or ceramic wool. A shear section 141 can be provided at a section corresponding to the vent hole of the heat-resistant element 140. The shear section 141 is ruptured due to pressure from the gas generated during the thermal runaway of the battery cell 31, and the discharged gas can be introduced into the gas guide 200. The heat-resistant element 140 can be located between the battery cell 31 and the gas guide 200 (see Figure 1). Fig. 4) or between the battery cell 31 and an upper cover 122 (see Fig. 8) be arranged. A communication hole 123 of the upper cover 122 is provided in a position corresponding to the shear section 141 of the heat-resistant element 140, and thus the gas discharged during thermal runaway can rupture the shear section 141 and can be introduced through the communication hole 123 and the opening section 203 into the gas guide device 200.

[0041] The gas guide device 200 is arranged such that the opening section 203 is oriented towards the battery module 30. That is, the battery module 30 and the gas guide device 200 can be arranged so that the vent hole and the opening 203 face each other. Therefore, the gas generated by the battery cell during thermal runaway can be introduced into the gas guide device 200 through the vent hole and the opening section 203. The gas guide device 200 can provide a path along which the introduced gas can be discharged to the outside. While an example in which the gas guide device 200 is arranged on a lower side of the battery module 30 is shown in the drawings, the arrangement of the gas guide device 200 can be suitably designed according to the position of the vent hole of the battery module 30.

[0042] According to one embodiment, the housing 100 can comprise a first cover 110, in which the battery module 30 is housed and which is open on one side, and a second cover 120, in which the gas guide device 200 is housed and which is coupled to the open side of the first cover 110.

[0043] A lower side of the first cover 110 can be open, based on the drawings. The first cover 110 can include a first chamber 101 in which the battery module 30 is housed (see Fig. 4) The battery module 30 can be inserted into the first chamber 101 through the open side of the first cover 110. The first cover 110 can be provided with a cooling flow path 111 for cooling the battery module 30. Furthermore, a thermal pad 130 for high thermal conductivity can be arranged between an inner surface of the first cover 110 and the battery module 30. That is, the first chamber 101 can accommodate the battery module 30 and the thermal pad 130, and, as described below, the heat-resistant element 140, a first protective element 160, and a second protective element 170 can be housed in the first chamber 101.

[0044] The second cover 120 is connected to the open side of the first cover 110 (the lower side based on the drawings) and can close the first chamber 101. The second cover 120 can include a second chamber 102 in which the gas guide device 200 is housed (see Fig. 4).

[0045] According to one embodiment, the second cover 120 can comprise a lower cover 121 on which the second plate 202 is supported. That is, the lower cover 121 can be in contact with a lower surface of the gas guide device 200. The lower cover 121 can comprise a bottom section on which the lower surface of the gas guide device 200 is supported, and a side wall section that projects upward from the lower surface and forms an edge. A second space 202, in which the gas guide device 200 is housed, can be provided between the lower surface and the side wall section.

[0046] Meanwhile, the gas generated by the battery cell can be discharged through the vent hole and introduced into the gas guide device 200. As described in detail below, the gas introduced into the gas guide device 200 can be guided through the guide section 204 according to the present disclosure so that it is discharged to the outside of the battery housing 20.

[0047] The first cover 110 can be provided with a first outlet hole 112 and a second outlet hole 113 so that the gas, which is introduced into the gas guide device 200 and guided to both sides in a lateral direction, can be discharged to the outside. Based on the drawings, the first outlet hole 112 can be provided on a front surface of the first cover 110 and the second outlet hole 113 can be provided on a rear surface of the first cover 110.The first outlet hole 112 and the second outlet hole 113 can be provided as a plurality of first outlet holes 112 and a plurality of second outlet holes 113 and can be provided such that they pass through an inner surface and an outer surface of the first cover 110, so that the gas discharged from the battery cell 31 can be guided through the gas guide device 200 to the first outlet hole 112 and the second outlet hole 113 and discharged to the outside.

[0048] According to one embodiment, the gas guide device 200 can be coupled to the housing 100 by means of an adhesive in the second chamber 102. According to another embodiment, the gas guide device 200 can be coupled to the housing 100 by screws in the second chamber 102. That is, the gas guide device 200 can be coupled to the upper cover 122 and / or the lower cover 121 by means of an adhesive or screws. The method by which the gas guide device 200 is coupled to the housing 100 is not limited by the present disclosure and can be carried out in any suitable manner.

[0049] Fig. Figure 3 is a schematic cross-sectional view along the in Fig. Line AA shown in 1.

[0050] With reference to Fig. 3. A partition 114 can be provided between the battery cells. The partition 114 can be arranged between the battery cells to prevent heat and flames from being transferred between adjacent battery cells. That is, the partition 114 can spatially separate the battery cells in the width and length direction or thermally separate the battery cells to prevent heat and flames from being transferred. The partition 114 can be made of an insulating material.

[0051] If thermal runaway occurs in any battery cell, the heat and flame generated during the thermal runaway can be prevented from being transferred to other battery cells through the partition 114, thus preventing further thermal runaway. Additionally, the gas generated by the battery cell during the thermal runaway can be introduced into the gas guide 200 through the vent hole and opening section 203 and discharged to the outside.

[0052] Fig. Figure 4 is a schematic cross-sectional view along the in Fig. Line BB shown in 1.

[0053] With reference to Fig. 4. A partition 114 and / or a wall cover 115 can be provided between the battery cells. The partition 114 and the wall cover 115 can be arranged between the battery cells to prevent heat and flames from being transferred between adjacent battery cells. That is, the partition 114 and the wall cover 115 can spatially separate the battery cells in the width and length direction or thermally separate the battery cells to prevent heat and flames from being transferred. The partition 114 and / or the wall cover 115 can be made of an insulating material.

[0054] If thermal runaway occurs in any battery cell, the heat and flame generated during the thermal runaway can be prevented from being transferred to other battery cells through the partition 114, thus preventing further thermal runaway. Additionally, the gas generated by the battery cell during the thermal runaway can be introduced into the gas guide 200 through the vent hole and opening section 203 and discharged to the outside.

[0055] The gas introduced into the gas guide device 200 through the opening section 203 can be guided laterally to both sides of the gas guide device 200 by the guide section 204. The gas guide device 200 is provided with a first through-hole 156 that opens laterally across the gas guide device 200 (see Fig. 11), and the gas introduced into the gas guide device 200 can move to the first outlet hole 112, which is provided at a front end of the first cover 110, or to the second outlet hole 113, which is provided at the rear end thereof, in order to be discharged to the outside through the first through-hole 156. Since the occurrence of successive thermal passage through the partition 114 and / or the wall cover 115 is prevented, the gas can be guided to both sides of only one gas guide device 200 in the lateral directions.

[0056] According to one embodiment, the battery housing 20 according to the present disclosure can include a first protective element 160 that protects an outlet path. The first protective element 160 can be provided in the first space 101. The first protective element 160 provides a path along which the gas, which is guided in the lateral direction in one side of the gas guide device 200, is gently discharged to the first outlet hole 112, and can also protect components around the outlet hole from the high temperature of the gas.

[0057] The shape of the first protective element 160 is not particularly restricted. An example in which the first protective element 160 has a rectangular parallelepiped shape is shown in the drawings. The first protective element 160 can be provided with a hole through which gas is introduced to the second chamber 102 and a hole through which gas is discharged to the first outlet hole 112. The gas discharged from the battery cell 31 can be guided through the gas guide 200 and discharged through the first protective element 160 to the first outlet hole 112.

[0058] Additionally, a valve 161 can be provided in the hole of the first protective element 160, which faces the first outlet hole 112. The valve 161 can have a structure that opens when a certain pressure level is applied. Therefore, the movement of air or gas through the first outlet hole 112 is restricted by the valve 161 in a normal situation, but the valve 161 can open and the release can be effected by a gas pressure that occurs during thermal runaway.

[0059] Additionally, the material of the first protective element 160 is not particularly restricted and it can, for example, be made of steel.

[0060] Fig. 5 is a schematic cross-sectional view along the in Fig. Line CC shown in 1.

[0061] With reference to Fig. According to one embodiment, the battery housing 20 of the present disclosure can include a second protective element 170 for protecting an outlet path. The second protective element 170 can be provided in the first space 101. The second protective element 170 provides a path along which the gas, which is guided laterally on the other side of the gas guide device 200, is gently discharged to the second outlet hole 113, and can also protect components around the outlet hole from the high temperature of the gas.

[0062] The shape of the second protective element 170 is not particularly restricted. An example in which the second protective element 170 has a hollow rod shape is shown in the drawings. The second protective element 170 can be provided with a hole through which gas is introduced into the second chamber 102 and a hole through which gas is discharged to the second outlet hole 113. The gas discharged from the battery cell 31 can be guided through the gas guide 200 and discharged through the second protective element 170 to the second outlet hole 113.

[0063] Additionally, although not shown in the drawings, a valve may be provided in the hole facing the second outlet hole 113 of the second protective element 170, and the movement of air or gas through the second outlet hole 113 may be restricted by the valve in a normal situation, but the valve 161 may be opened by pressure of the gas generated during thermal runaway and the release may be carried out.

[0064] Additionally, the material of the second protective element 170 is also not particularly restricted and it can, for example, be made of steel.

[0065] Fig. Figure 6 is a perspective view showing a battery pack according to another embodiment of the present disclosure.

[0066] Compared to the one in Fig. The embodiment shown in 2 can be used in Fig. The embodiment shown in Figure 6 further comprises a pair of guide elements 180, which are provided on both sides of the gas guide device 200 in a longitudinal direction. A detailed description of identical configurations is omitted; instead, the differences are mainly described.

[0067] The guide element 180 has a hollow rod shape, which is provided in the width direction of the gas guide device 200, and a plurality of holes 181, arranged in a longitudinal direction of the guide element 180, can be provided on a surface facing the gas guide device 200. That is, a guide element 180 located on one side in the longitudinal direction of the gas guide device 200 and a guide element 180 located on the other side can be arranged such that they face the holes 181.

[0068] As described above, since the partition 114 and / or the wall cover 115 is provided between the battery cells to prevent the transfer of heat and flame, it can prevent additional thermal runaway in other battery cells as a result of thermal runaway occurring in one battery cell. However, even with the partition 114 and / or the wall cover 115 in place, there remains an exceptional risk that successive thermal runaway events could occur or that thermal runaway could occur independently in two or more battery cells.

[0069] If thermal runaway occurs in only one battery cell, the gas generated in the battery cell can be guided through the guide section 204 in the lateral direction to both sides of the gas guide device 200, as described above.

[0070] However, if thermal runaway occurs in two or more battery cells, it may be difficult to ensure uniform gas discharge using only the gas guide device 200.

[0071] First, if thermal runaway occurs in two or more battery cells in which the vent holes are arranged opposite the same gas guide device 200 (i.e., two or more battery cells positioned in the same row based on the embodiment illustrated in the drawing), the gas generated in the battery cells can be introduced into the same gas guide device 200 and guided to both sides in the lateral direction to be discharged to the outside.

[0072] Next, if thermal runaway occurs in two or more battery cells where the vent holes are arranged opposite a different gas guide device 200 (i.e., two or more battery cells positioned in different rows based on the embodiment shown in the drawings), the gas generated in each battery cell is guided laterally to both sides of the corresponding gas guide device 200. However, the gases guided in opposite directions may overlap in an intermediate area, and uniform venting cannot be achieved. Since the guide element 180 is provided, the venting of the overlapping gases can be carried out smoothly.

[0073] Fig. Figure 7 shows a cross-sectional view showing a gas guidance device and a guide element of Fig. 6 represents.

[0074] Fig. Figure 7 shows a condition in which gas is introduced into each of two adjacent gas guide devices 200. The gas guided outwards in the lateral direction in each gas guide device 200 can be gently discharged outwards through the first outlet hole 112 and the second outlet hole 113, but the gases guided inwards in the lateral direction overlap between the two gas guide devices 200. The overlapping gas moves in the longitudinal direction of the gas guide device 200, and the gas can be introduced into the hollow guide element 180 through the hole 181 and gently discharged outwards in the longitudinal direction of the guide element 180 through the first outlet hole 112 and the second outlet hole 113.

[0075] Fig. Figure 7 shows a case in which the gas is introduced into each of adjacent gas guide devices 200, but it can be understood in the same way in a case in which the gas is introduced into each of the gas guide devices 200 that are spaced apart with one or more gas guide devices 200 in between.

[0076] Fig. Figure 8 is a perspective exploded view showing a battery pack according to another embodiment of the present disclosure.

[0077] Compared to the one in Fig. In the embodiment shown in 2, the second cover 120 can further enclose the upper cover 122 in the Fig. The embodiment shown in section 8 is included. A detailed description of identical configurations is omitted; instead, the focus is primarily on the differences.

[0078] With reference to Fig. 8. According to one embodiment, the second cover 120 further comprises the upper cover 122, and the gas guide device 200 can be located between the upper cover 122 and the lower cover 121. That is, the second space 102 of the second cover 120 can be provided between the upper cover 122 and the lower cover 121. The upper cover 122 can comprise an upper surface of the gas guide device 200, i.e., an upper surface section on which the first plate 201 is supported, and a side wall section that projects downward from the upper surface section and is provided with an edge (see Fig. 9).

[0079] According to one embodiment, the upper cover 122 can be provided with a communication hole 123 that communicates with the opening section 203 of the gas guide device 200. The first chamber 101 and the second chamber 102 can communicate through the communication hole 123. The communication hole 123 can be designed to extend through an inner surface and an outer surface of the upper cover 122. The gas generated in the battery cell 31 during thermal runaway can be introduced into the gas guide device 200 through the communication hole 123. The communication holes 123 can be provided as a plurality of communication holes 123 corresponding to the vent holes of the battery modules 30. An example in which the plurality of communication holes 123 are provided in a plurality of rows to correspond to the arrangement of the battery modules 30 is shown in the drawings.The gas guide device 200 can be provided as a plurality of gas guide devices 200 to correspond to the communication holes 123, in order to allow all gases generated in the battery cell 31 to be introduced into the gas guide devices 200. An example in which the plurality of gas guide devices 200 are arranged in parallel to correspond to the arrangement of the battery modules 30 is shown in the drawings.

[0080] Fig. 9 is a first cross-sectional view, which shows the in Fig. The battery pack shown is number 8. Fig. 10 is a second cross-sectional view, which shows the in Fig. The battery pack shown is number 8. Fig. Figure 9 shows a cross-section which Fig. 4 in the in Fig. This corresponds to the battery pack shown in section 8. Additionally, it shows... Fig. 10 a cross-section that Fig. 5 in the in Fig. The battery pack shown in Figure 8 corresponds to this. Similarly, a detailed description of identical configurations is omitted, and mainly the differences are described.

[0081] With reference to Fig. 9 and Fig. 10. The upper cover 122 can be provided with a third outlet hole 124 that extends through the inner and outer surfaces of the upper cover 122. The third outlet hole 124 can be located at a front and a rear end of the upper cover 122 as shown in the drawings and can communicate with the first chamber 101 and the second chamber 102. Through the third outlet hole 124, the gas introduced into the gas guide device 200 and guided laterally on both sides can be discharged to the outside through the first outlet hole 112 or the second outlet hole 113.

[0082] The third outlet hole 124 of the upper cover 122 can be positioned to correspond to the holes facing the second space 102 of the first protective element 160 and the second protective element 170, into which the gas is introduced.

[0083] The structure of the gas guidance device 200 is described in detail below.

[0084] Fig. 11 is a perspective view showing the gas guidance device according to an embodiment of the present disclosure. Fig. Figure 12 shows a cross-sectional view of the gas guide device. Fig. 11 represents.

[0085] With reference to Fig. 11 and Fig. 12. According to one embodiment, the second plate 202 can be provided with a guide section 204. The guide section 204 can guide a path of movement for gas, foreign materials, etc., which are introduced into the gas guide device 200 through the opening section 203. That is, the high-temperature and high-pressure gas generated during the thermal runaway of the battery cell 31 can be guided through the guide section 204 and can be gently discharged to the outside of the battery housing 20 through the first outlet hole 112 and the second outlet hole 113, as described in this disclosure. Therefore, the stability of the battery pack 10 can be improved, as described in this disclosure.

[0086] According to one embodiment, the opening section 203 and the guide section 204 can be provided at the centers of the first plate 201 and the second plate 202 in the lateral direction. The gas guide device 200 can have a shape with a constant cross-section in the longitudinal direction, and the opening section 203 and the guide section 204 can be provided at the centers of the first plate 201 and the second plate 202 in the lateral direction, respectively. The gas introduced through the opening section 203 can be guided by the guide section 204 to both sides in the lateral direction and discharged to the outside.

[0087] According to one embodiment, the guide section 204 projects forward in such a way that both side surfaces can be inclined. Although an example in which the guide section 204 has a triangular cross-section is shown in the drawings, the shape of the guide section 204 is not limited to this. Because the guide section 204 has the tapered, projecting shape, the gas introduced into the space 205 through the opening section 203, which is positioned facing the guide section 204, can be guided to both sides in the lateral direction and discharged outwards.

[0088] According to one embodiment, the gas guidance device 200 can further comprise a support 207 having an inner surface facing the space 205 and connecting the first plate 201 and the second plate 202. The support 207 can form an outer wall of the gas guidance device 200. That is, the space 205 can be provided between the first plate 210, the second plate 202, and the support 207.

[0089] According to one embodiment, the carrier 207 can be provided with a first through-hole 206 that extends through an inner surface and an outer surface of the carrier 207. That is, the gas, which is introduced into the space 205 through the opening section 203 and guided laterally by the guide section 204, can move through the first through-hole 206 of the carrier 207 to the outside of the gas guide device 200 and, according to the present disclosure, can be discharged from the battery housing 20 through the first outlet hole 112 and the second outlet hole 113.

[0090] Fig. Figure 13 is a cross-sectional view showing a gas guidance device according to another embodiment of the present disclosure.

[0091] With reference to Fig. In one embodiment, the gas guidance device 200 may further comprise a cover element 208 that covers a surface of the guide section 204. The cover element 208 may be provided to prevent the shape of the guide section 204 from being deformed by the high-temperature and high-pressure gas generated in the battery cell 31 and introduced through the opening section 203. The cover element 208 may be made of heat-resistant materials such as mica and stainless steel (SUS). Because the guide section 204 is covered by the cover element 208, the shape of the guide section 204 can be maintained even when the high-temperature gas is introduced, and thus the high-temperature gas can be guided for gentle discharge to the outside.

[0092] Fig. Figure 14 is a perspective view depicting a gas guidance device according to yet another embodiment of the present disclosure. For the same purposes as those described in Fig. Since the embodiments shown in 11 are identical, a detailed description is omitted, and mainly the differences are described.

[0093] With reference to Fig. According to one embodiment, a gas guidance device 300, which further comprises a first mesh 308 covering an opening section 303, can be provided. The first mesh 308 prevents a flame generated during the thermal runaway of a battery cell 31 from being introduced directly into the gas guidance device 200. Accordingly, the gas discharge through the gas guidance device 200 can be directed laterally in the lateral direction and smoothly carried out through a guide section 304, thus improving the stability of a battery pack 10.

[0094] According to one embodiment, the gas guide device 300 can further comprise a second mesh 309 covering a first through-hole 306. The second mesh 309 prevents conductive particles contained in the gas introduced into a chamber 305 from being discharged to the outside of the gas guide device 300. Additionally, foreign materials generated when the battery cell housing 31 and surrounding components melt due to the high temperature generated during thermal runaway can be introduced into the chamber 305 along with the gas, but are prevented from being discharged to the outside of the gas guide device 300. That is, the second mesh 309 prevents the foreign materials contained in the gas introduced into the chamber 305 from being discharged to the outside of a battery housing 20 according to the present disclosure.

[0095] According to one embodiment, the holes of the second mesh 309 can be smaller than the holes of the first mesh 308. According to one embodiment, the gas guide device 300 according to the present disclosure further comprises the first mesh 308, which covers the opening section 303, a support 307 having the first through-hole 306, which faces the space 305 on an inner surface, connects a first plate 301 and a second plate 302 and extends through an inner surface and an outer surface of the support 307, and the second mesh 309, which covers the first through-hole 306, and the holes of the second mesh 309 can be smaller than the holes of the first mesh 308.Since the holes of the second mesh 309 are smaller than the holes of the first mesh 308, that is, the second mesh 309 has a closer spacing than the first mesh 308, the foreign materials contained in the gas can pass through the first mesh 308 to be introduced into the space 305, but cannot pass through the second mesh 309 and can be isolated within the gas guiding device 300.

[0096] Fig. 15 is a perspective view showing a gas guidance device according to yet another embodiment of the present disclosure. For the same purposes as those of the Fig. Since the embodiments shown in 11 are identical, a detailed description is omitted, and mainly the differences are described.

[0097] With reference to Fig. 15 According to one embodiment, a gas guide device 400, which further comprises a reinforcement 408 connecting a first plate 401 and a second plate 402 therein, can be provided. A support 407 can connect the first plate 401 and the second plate 402 on an outer side in the width direction, and the reinforcement 408 can connect the first plate 401 and the second plate 402 on an inner side in the width direction. A load of a battery module 30 applied to the gas guide device 400 is supported by the reinforcement 408, and the stiffness can be improved. That is, according to the design of the battery housing according to the present disclosure, the battery module 30 can be positioned above the gas guide device 400, and the load of the battery module 30 can be applied to the gas guide device 400.Since the reinforcement 408 is provided, the stiffness can be improved, and the shape of the gas guide device 400 can be maintained. Therefore, the stability of the battery pack 10 can be improved. If the gas guide device 400 is provided as a plurality of gas guide devices 400, the reinforcement 408 can be selectively installed only in some of the gas guide devices 400 on which the load is concentrated.

[0098] According to one embodiment, the reinforcement 408 can be provided with a second through-hole 409 that extends through an inner surface and an outer surface of the reinforcement 408. The opening section 403 and the first through-hole 406 are spatially connected by the second through-hole 409, and the gas introduced into the opening section 403 can be discharged to the outside of the gas guide device 400 through the second through-hole 409 and the first through-hole 406.

[0099] Fig. 16 is a perspective view showing a gas guidance device according to yet another embodiment of the present disclosure. For the same purposes as those of the Fig. Since the embodiments shown in 11 are identical, a detailed description is omitted, and mainly the differences are described.

[0100] With reference to Fig. 16. A reinforcement 408 can be provided to be removable from a first plate 401 and a second plate 402. That is, the reinforcement 408 can be selectively coupled to or decoupled from the first plate 401 and the second plate 402. Inner surfaces of the first plate 401 and the second plate 402 are provided with grooves into which the reinforcement 408 can be inserted, and the reinforcement 408 can slide in a longitudinal direction to be inserted into the grooves of the first plate 401 and the second plate 402. The reinforcement 408 can be coupled to all of the plurality of gas guide devices 400, or the reinforcement 408 can be coupled to only some of the gas guide devices 400 and not to the remaining gas guide devices 400. The amplification 408 can be selectively coupled only with some gas guide devices 400 on which the load is concentrated.

[0101] Fig. 17 is a perspective view showing a gas guidance device according to yet another embodiment of the present disclosure. For the same purposes as those of the Fig. Since the embodiments shown in 11 are identical, a detailed description is omitted, and mainly the differences are described.

[0102] With reference to Fig. 17 According to one embodiment, a gas guidance device 500 may be provided in which a first plate 504 is provided with a first rib 511 which projects towards the second plate 502.

[0103] According to one embodiment, the gas guide device 500 can be provided in which the second plate 502 is provided with a second rib 512 that projects towards the first plate 501.

[0104] Based on the drawing, the first rib 511 can project from a lower surface of the first plate 501. The second rib 512 can project from an upper surface of the second plate 502. Additionally, if both the first rib 511 and the second rib 512 are present, they can be arranged alternately. The inflow of outside air through the first through-hole 506 from the outside of the gas guide device 500 can be suppressed by the first rib 511 and the second rib 512. By suppressing the inflow of outside air, the supply of oxygen to the battery cells is minimized, which can delay or suppress thermal runaway.

[0105] According to the gas guidance device and the battery pack, which has the structure described above, a discharge path can be created for a high-temperature and high-pressure gas generated in a battery cell. Additionally, flame backflow can be prevented. Furthermore, the discharge of foreign materials, such as conductive particles, to the outside can be prevented. Additionally, the stability and rigidity of the battery pack can be improved.

[0106] According to some embodiments of the present disclosure, a battery housing and a battery pack comprising the same may be provided.

[0107] According to some embodiments of the present disclosure, a high-temperature and high-pressure gas generated in a battery cell can be guided along a discharge path.

[0108] According to some embodiments of the present disclosure, flame backflow can be prevented.

[0109] According to some embodiments of the present disclosure, it is possible to prevent foreign materials, such as conductive particles, from being discharged to the outside.

[0110] According to some embodiments of the present disclosure, the stability of the battery pack can be improved.

[0111] According to some embodiments of the present disclosure, the stiffness of the battery pack can be improved.

[0112] However, the technical effects that can be obtained through the embodiments of the present disclosure are not necessarily limited to the effects mentioned above. Other technical effects not mentioned are clearly understandable to the person skilled in the art, to whom the present disclosure relates, from other explanations of the description, such as the detailed description.

[0113] Some aspects of the present disclosure are as follows: Aspect 1: Battery housing (20), comprising: a gas guidance device (200, 300, 400, 500) with a first and a second plate (201, 202, 301, 302, 401, 402, 501, 502) spaced apart from each other by a space (205, 305) between them; and a housing (100) in which a battery module (30) and the gas guidance device (200, 300, 400, 500) are housed, wherein an opening section (203, 303, 403) is provided to extend through the first plate (201, 301, 401, 501) and which is connected to the space (205, 305), a guide section (204, 304) projecting towards the opening section (203, 303, 403) is provided on the second plate (202, 302, 402, 502) and the gas guidance device (200, 300, 400, 500) is arranged such that the opening section (203, 303, 403) is oriented towards the battery module (30).

[0114] Aspect 2: Battery housing (20) according to aspect 1, wherein the housing (100) comprises a first cover (110) in which the battery module (30) is housed and which is open on one side, and a second cover (120) in which the gas guide device (200, 300, 400, 500) is housed and which is coupled to the open side of the first cover (110).

[0115] Aspect 3: Battery housing (20) according to one of the preceding aspects, wherein the second cover (120) comprises a lower cover (121) on which the second plate (202, 302, 402, 502) is supported, and an upper cover (122) which is provided with a communication hole (123) which communicates with the opening section (203, 303, 403), wherein the gas guidance device (200, 300, 400, 500) is located between the upper cover (122) and the lower cover (120).

[0116] Aspect 4: Battery housing (20) according to one of the preceding aspects, wherein the opening section (203, 303, 403) and the guide section (204, 304) are provided at the centers of the first plate (201, 301, 401, 501) and the second plate (202, 302, 402, 502) in a lateral direction.

[0117] Aspect 5: Battery housing (20) according to one of the preceding aspects, wherein the guide section (204, 304) projects in such a way as to be tapered so that both surfaces are provided in a lateral direction to be inclined.

[0118] Aspect 6: Battery housing (20) according to one of the preceding aspects, wherein the gas guidance device (200, 300, 400, 500) further comprises a first net (308) covering the opening section (203, 303, 403).

[0119] Aspect 7: Battery housing (20) according to one of the preceding aspects, wherein the gas guidance device (200, 300, 400, 500) further comprises a first net (308) covering the opening section (203, 303, 403).

[0120] Aspect 8: Battery housing (20) according to one of the preceding aspects, wherein the gas guidance device (200, 300, 400, 500) further comprises a support (207, 307, 407) whose inner surface faces the space (205, 305) and which connects the first plate (201, 301, 401, 501) and the second plate (202, 302, 402, 502), wherein a first through-hole (206, 306, 406, 506) is provided to pass through an inner surface and an outer surface of the support (207, 307, 407).

[0121] Aspect 9: Battery housing (20) according to one of the preceding aspects, wherein the gas guidance device (200, 300, 400, 500) further comprises a second mesh (309) covering the first through-hole (206, 306, 406, 506).

[0122] Aspect 10: Battery housing (20) according to one of the preceding aspects, wherein the gas guidance device (200, 300, 400, 500) further comprises: a first mesh (308) covering the opening section (203, 303, 403); a support (207, 307, 407) whose inner surface faces the space (205, 305) and which connects the first plate (201, 301, 401, 501) and the second plate (202, 302, 402, 502) and is provided with a first through-hole (206, 306, 406, 506) passing through an inner surface and an outer surface thereof; and a second net (309) covering the first through hole (206, 306, 406, 506), wherein a hole of the second net (309) is smaller than a hole of the first net (308).

[0123] Aspect 11: Battery housing (20) according to one of the preceding aspects, wherein the gas guiding device (200, 300, 400, 500) comprises a reinforcement (408) which connects the first plate (201, 301, 401, 501) and the second plate (202, 302, 402, 502) on an inner side instead of the support (207).

[0124] Aspect 12: Battery housing (20) according to one of the preceding aspects, wherein a second through-hole (409) is provided to pass through an inner surface and an outer surface of the reinforcement (408).

[0125] Aspect 13: Battery housing (20) according to one of the preceding aspects, wherein a first rib (511) projecting towards the second plate (202, 302, 402, 502) is provided on the first plate (201, 301, 401, 501).

[0126] Aspect 14: Battery housing (20) according to one of the preceding aspects, wherein a second rib (512) projecting towards the first plate (201, 301, 401, 501) is provided on the second plate (202, 302, 402, 502).

[0127] Aspect 15: Battery pack (10), comprising: the battery housing (20) according to any of the preceding aspects; and a battery module (30) housed in the housing (100).

[0128] The content described above is merely an example of the application of the principle of this disclosure, and it may include other configurations. without deviating from the scope of protection of the present disclosure.

Claims

[1] Battery housing (20), comprising: a gas guide device (200, 300, 400, 500) with a first and a second plate (201, 202, 301, 302, 401, 402, 501, 502) spaced apart from each other by a space (205, 305) between them; and a housing (100) in which a battery module (30) and the gas guidance device (200, 300, 400, 500) are housed, wherein an opening section (203, 303, 403) is provided to pass through the first plate (201, 301, 401, 501) and is connected to the space (205, 305), a guide section (204, 304) projecting towards the opening section (203, 303, 403) is provided on the second plate (202, 302, 402, 502), and the gas guidance device (200, 300, 400, 500) is arranged such that the opening section (203, 303, 403) is aligned towards the battery module (30). [2] Battery housing (20) according to claim 1, wherein the housing (100) comprises a first cover (110) in which the battery module (30) is housed and which is open on one side, and a second cover (120) in which the gas guide device (200, 300, 400, 500) is housed and which is coupled to the open side of the first cover (110). [3] Battery housing (20) according to one of the preceding claims, wherein the second cover (120) comprises a lower cover (121) on which the second plate (202, 302, 402, 502) is supported, and an upper cover (122) which is provided with a communication hole (123) which communicates with the opening section (203, 303, 403), wherein the gas guide device (200, 300, 400, 500) is located between the upper cover (122) and the lower cover (120). [4] Battery housing (20) according to one of the preceding claims, wherein the opening section (203, 303, 403) and the guide section (204, 304) are provided at the centers of the first plate (201, 301, 401, 501) and the second plate (202, 302, 402, 502) in a lateral direction. [5] Battery housing (20) according to one of the preceding claims, wherein the guide section (204, 304) protrudes in such a way that both surfaces are provided in a lateral direction so that they are inclined. [6] Battery housing (20) according to one of the preceding claims, wherein the gas guidance device (200, 300, 400, 500) further comprises a cover element (208) that covers a surface of the guide section (204, 304). [7] Battery housing (20) according to one of the preceding claims, wherein the gas guidance device (200, 300, 400, 500) further comprises a first net (308) covering the opening section (203, 303, 403). [8] Battery housing (20) according to one of the preceding claims, wherein the gas guidance device (200, 300, 400, 500) further comprises a support (207, 307, 407) whose inner surface faces the space (205, 305) and which connects the first plate (201, 301, 401, 501) and the second plate (202, 302, 402, 502), wherein a first through-hole (206, 306, 406, 506) is provided to pass through an inner surface and an outer surface of the support (207, 307, 407). [9] Battery housing (20) according to one of the preceding claims, wherein the gas guidance device (200, 300, 400, 500) further comprises a second mesh (309) covering the first through-hole (206, 306, 406, 506). [10] Battery housing (20) according to one of the preceding claims, wherein the gas guidance device (200, 300, 400, 500) further comprises: a first network (308) covering the opening section (203, 303, 403); a support (207, 307, 407) whose inner surface faces the space (205, 305) and which connects the first plate (201, 301, 401, 501) and the second plate (202, 302, 402, 502) and is provided with a first through-hole (206, 306, 406, 506) which passes through an inner surface and an outer surface thereof; and a second net (309) covering the first through hole (206, 306, 406, 506), where a hole in the second net (309) is smaller than a hole in the first net (308). [11] Battery housing (20) according to one of the preceding claims, wherein the gas guidance device (200, 300, 400, 500) comprises a reinforcement (408) which connects the first plate (201, 301, 401, 501) and the second plate (202, 302, 402, 502) on an inner side instead of the support (207). [12] Battery housing (20) according to one of the preceding claims, wherein a second through-hole (409) is provided to pass through an inner surface and an outer surface of the reinforcement (408). [13] Battery housing (20) according to one of the preceding claims, wherein a first rib (511) projecting towards the second plate (202, 302, 402, 502) is provided on the first plate (201, 301, 401, 501). [14] Battery housing (20) according to one of the preceding claims, wherein a second rib (512) projecting towards the first plate (201, 301, 401, 501) is provided on the second plate (202, 302, 402, 502). [15] Battery pack (10), comprising: the battery housing (20) according to one of the preceding claims; and a battery module (30) which is housed in the casing (100).

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