Battery device

Abstract

The technical idea of the present invention provides a battery device including a case having an internal space accommodating a battery cell, an exhaust valve installed on the case and configured to discharge gas to the outside, and a valve protection cover provided at an inlet side of the exhaust valve facing the internal space of the case, wherein the valve protection cover includes a front wall facing the inlet of the exhaust valve, and a peripheral wall extending along a periphery of the front wall and including an exhaust hole.

Description

Technical Field

[0001] This disclosure relates to a battery device. This application claims the benefit of priority based on Korean Patent Application No. 10-2024-0137548, filed on October 10, 2024, the entire contents of which are incorporated herein by reference. Background Technology

[0002] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. They are widely used as a power source for various types of wireless devices, such as mobile phones, laptops, and cordless vacuum cleaners. Recently, with the significant reduction in the per-unit capacity manufacturing cost of secondary batteries due to increased energy density and economies of scale, and with battery electric vehicles (BEVs) achieving driving ranges comparable to gasoline-powered vehicles, the primary use of secondary batteries is shifting from mobile devices to mobility tools.

[0003] As secondary batteries are increasingly used in vehicles, the need for their safety is growing. Drivers' lives can be endangered in the event of an accident involving a secondary battery used in a vehicle, such as a fire. Therefore, research into technologies to enhance the safety of secondary batteries is essential. Summary of the Invention

[0004] Technical issues

[0005] This disclosure aims to provide a battery device.

[0006] Technical solution

[0007] One aspect of this disclosure provides a battery device comprising: a housing having an internal space for accommodating battery cells; a vent valve mounted in the housing and configured to vent gas to the outside; and a valve protection cover located at the inlet of the vent valve facing the internal space of the housing, the valve protection cover comprising: a front wall facing the inlet of the vent valve; and a peripheral wall extending along the periphery of the front wall and including a vent hole.

[0008] In one embodiment, the valve cover may be configured to prevent gas from flowing through the front wall and allow the gas to flow through the vent hole of the peripheral wall.

[0009] In one embodiment, the battery device may further include a porous filter attached to the peripheral wall to cover the vent holes of the peripheral wall.

[0010] In one embodiment, the porous filter may contain metal foam.

[0011] In one embodiment, the front wall may face the exhaust valve in a first direction, and the exhaust port of the peripheral wall may penetrate the peripheral wall in a direction perpendicular to the first direction.

[0012] In one embodiment, the valve cover may further include a flange extending from the peripheral wall and fastened to the housing.

[0013] In one embodiment, the valve cover may further include an internal channel configured to allow cooling fluid to flow through it.

[0014] In one embodiment, the internal channel of the valve cover may be disposed within the peripheral wall.

[0015] In one embodiment, the internal channel of the valve cover may be disposed within the peripheral wall and the front wall.

[0016] In one embodiment, the housing may include a cooling channel configured to allow cooling fluid to flow through it, and the cooling channel of the housing may communicate with the internal channel of the valve cover.

[0017] In one embodiment, the valve cover may further include a flange extending from the peripheral wall and fastened to the housing, the internal channel of the valve cover may be disposed within the flange, and the cooling channel of the housing and the internal channel of the valve cover may be connected at the interface between the flange of the valve cover and the housing.

[0018] In one embodiment, the exhaust valve may be a safety valve configured to discharge gas to the outside based on the pressure level of the internal space of the housing.

[0019] In one embodiment, the valve cover may be configured to prevent gas from flowing through the front wall and allow the gas to flow through the vent hole of the peripheral wall. The valve cover may also include an internal channel configured to allow cooling fluid to flow through the internal channel. The housing may include a cooling channel configured to allow cooling fluid to flow through the cooling channel and communicate with the internal channel of the valve cover. The battery device may also include a porous filter attached to the peripheral wall to cover the vent hole of the peripheral wall.

[0020] Beneficial effects

[0021] According to one embodiment, the battery device may include a valve protection cover configured to allow gas flow to the vent valve and suppress the arrival of high-temperature particles at the vent valve. Therefore, performance degradation of the vent valve due to particle accumulation in its passage can be suppressed, and external fires caused by high-temperature particles being released to the outside through the vent valve can be prevented.

[0022] According to one embodiment, the battery device includes a porous filter located in the venting path provided by the valve cover to filter out toxic and harmful substances, thereby preventing the emission of toxic and harmful substances to the outside of the battery device.

[0023] According to the battery device of the embodiment, cooling fluid can flow into the internal channels of the valve protection cover to cool particles and gases around the valve protection cover. Therefore, it is possible to more effectively suppress high-temperature particles from reaching the exhaust valve and to suppress heat transfer between battery cells caused by high-temperature gases.

[0024] The effects achievable by the embodiments of this disclosure are not limited to those described above, and those skilled in the art to which the embodiments of this disclosure pertain will clearly derive and understand other effects not described herein based on the following description. In other words, those skilled in the art can derive unexpected effects achieved in implementing the embodiments of this disclosure. Attached Figure Description

[0025] Figure 1 This is a schematic configuration diagram of a battery device according to an embodiment.

[0026] Figure 2 This is a three-dimensional view of a part of the battery device.

[0027] Figure 3 It is a 3D view of the valve cover and the porous filter.

[0028] Figure 4 This is a 3D view of a porous filter.

[0029] Figure 5 This is a cross-sectional view of a part of the battery device.

[0030] Figure 6 This is a cross-sectional view of a portion of the battery device according to an embodiment. Detailed Implementation

[0031] In the following, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Before describing embodiments of the present disclosure, the terms or expressions used in this specification and claims should not be construed as limited to their commonly understood or defined meanings in common dictionaries, and should be understood according to the meanings and concepts corresponding to the present disclosure, based on the inventors' ability to appropriately define the terms or expressions to best interpret the principles of the present disclosure.

[0032] Therefore, the embodiments described herein and the configurations shown in the accompanying drawings are merely examples of this disclosure and do not reflect all the technical ideas of this disclosure. It should be understood that various equivalents and modifications have been made to replace the configurations as of the date of filing of this application.

[0033] When it is determined that a well-known configuration or function related to the description of this disclosure would obscure the subject matter of this disclosure due to unnecessary details, the well-known configuration or function related to the description of this disclosure will not be described in detail.

[0034] Because the embodiments of this disclosure are provided to explain the disclosure more fully to those skilled in the art, the shapes, dimensions, etc. of the components shown in the drawings may be enlarged, omitted, or illustrated schematically for clarity. Therefore, it should not be understood that the dimensions or proportions of the components fully reflect their actual dimensions or proportions.

[0035] (First Implementation)

[0036] Figure 1 This is a schematic configuration diagram of the battery device 10 according to an embodiment. Figure 2 This is a perspective view of a part of the battery device 10. Figure 3 This is a perspective view of the valve cover 150 and the porous filter 170. Figure 4 This is a 3D view of the porous filter 170. Figure 5 This is a cross-sectional view of a part of the battery device 10.

[0037] refer to Figures 1 to 5 The battery device 10 may include a housing 110, a plurality of cell assemblies 130, an exhaust valve 140, a valve protection cover 150, and a porous filter 170.

[0038] The housing 110 can provide an internal space 119 for accommodating multiple cell assemblies 130. The housing 110 may include a base frame 111 and a side frame 113.

[0039] The base frame 111 can support multiple cell assemblies 130. The base frame 111 can be in the form of a flat plate that extends generally along a first horizontal direction (e.g., the X-axis direction) and a second horizontal direction (e.g., the Y-axis direction).

[0040] Side frame 113 may be coupled to base frame 111. Side frame 113 may be coupled to the periphery of base frame 111 and extend along the periphery of base frame 111. Side frame 113 may extend continuously along the periphery of base frame 111 to surround a plurality of cell assemblies 130. In plan view, side frame 113 may have an approximately quadrilateral ring shape. Side frame 113 may, together with base frame 111, define an internal space 119 for accommodating a plurality of cell assemblies 130. Housing 110 may also include a top cover (not shown) coupled to side frame 113 and covering the plurality of cell assemblies 130.

[0041] Multiple cell assemblies 130 may be arranged on the base frame 111 along a first horizontal direction (e.g., the X-axis direction) and / or a second horizontal direction (e.g., the Y-axis direction). Each cell assembly 130 may correspond to a battery module or a cell-to-battery pack unit. The housing 110 may include a central beam 115 on the base frame 111. Some of the multiple cell assemblies 130 may be disposed on one side of the central beam 115, and others may be disposed on the other side of the central beam 115.

[0042] Each cell assembly 130 may include multiple battery cells 131. Each battery cell 131 is a basic unit of a lithium-ion battery (i.e., a secondary battery). Each battery cell 131 may include an electrode assembly, an electrolyte, and a cell casing. The electrode assembly included in the cell casing may include a positive electrode, a negative electrode, and a separator between the positive and negative electrodes. Depending on the assembly configuration, the electrode assembly may be a wound electrode assembly or a stacked electrode assembly. A wound electrode assembly may include a structure in which the positive electrode, negative electrode, and the separator between the positive and negative electrodes are wound together. A stacked electrode assembly may include multiple positive electrodes and multiple electrodes stacked sequentially, as well as multiple separators located between the positive and negative electrodes. The positive electrode may include a positive current collector and a positive active material. The negative electrode may include a negative current collector and a negative active material.

[0043] Each battery cell 131 can be a pouch cell, a cylindrical cell, or a prismatic cell. The electrode assembly of a pouch cell is housed in a pouch containing aluminum laminates. The electrode assembly of a cylindrical cell is housed in a cylindrical metal can. The electrode assembly of a prismatic cell is housed in a prismatic metal can.

[0044] The multiple battery cells 131 of each cell assembly 130 can be connected in series and / or in parallel. For example, multiple battery cells 131 can be connected in series with each other. For example, multiple battery cells 131 can be connected in parallel with each other. For example, when a group of two or more battery cells 131 connected in parallel with each other is defined as a group, a group consisting of two or more battery cells 131 connected in parallel with each other and another group consisting of two or more battery cells 131 connected in parallel with each other can be connected in series.

[0045] In one embodiment, a plurality of battery cells 131 may be arranged along a first horizontal direction (e.g., the X-axis direction) and may each extend along a second horizontal direction (e.g., the Y-axis direction). Electrode leads may be disposed at at least one end of each battery cell 131 at an opposite end in the second horizontal direction (e.g., the Y-axis direction). The electrode leads of adjacent battery cells 131 may be electrically and physically connected to each other.

[0046] Multiple cell assemblies 130 can be thermally and physically bonded to the base frame 111 via thermally conductive adhesive layers. The thermally conductive adhesive layers may include thermal resins and / or thermal interface materials (TIMs).

[0047] An exhaust valve 140 may be mounted in the housing 110. In one embodiment, the exhaust valve 140 may be mounted on the side frame 113. In another embodiment, the exhaust valve 140 may be mounted on the base frame 111. In one embodiment, the battery device 10 may include a plurality of exhaust valves 140 mounted in the housing 110. In another embodiment, the plurality of exhaust valves 140 may be mounted on the side frame 113. In another embodiment, the plurality of exhaust valves 140 may be mounted on the base frame 111. In another embodiment, some of the exhaust valves 140 may be mounted on the side frame 113, and the other exhaust valves 140 may be mounted on the base frame 111.

[0048] An exhaust valve 140 may be installed in the housing 110 and configured to vent gas from the interior space 119 of the housing 110 to the outside of the housing 110. Depending on the pressure level of the interior space 119 of the housing 110, the exhaust valve 140 may allow or prevent gas from flowing from the interior space 119 of the housing 110 toward the outside of the housing 110. The exhaust valve 140 may include an inlet 149 toward the interior space 119 of the housing 110, an outlet toward the exterior space of the housing 110, and a passage extending between the inlet 149 and the outlet, and may be configured to open or close the passage according to the pressure level of the interior space 119 of the housing 110. In an embodiment, the exhaust valve 140 may be a safety valve.

[0049] When the pressure in the internal space 119 of the housing 110 is less than or equal to a preset reference value, the exhaust valve 140 can be in the closed position to close the passage therein, thereby preventing gas from flowing between the internal space 119 of the housing 110 and the outside of the housing 110. When the pressure in the internal space 119 of the housing 110 is greater than the preset reference value, the exhaust valve 140 can be in the open position to open the passage therein, thereby allowing gas to flow from the internal space 119 of the housing 110 toward the outside of the housing 110. When the pressure in the internal space 119 of the housing 110 is less than or equal to the preset reference value due to gas discharged through the exhaust valve 140, the exhaust valve 140 can move from the open position to the closed position to prevent gas from flowing between the internal space 119 of the housing 110 and the outside of the housing 110. Figure 5 The exhaust valve 140 is shown in the open position.

[0050] The exhaust valve 140 may include a valve frame 141, a valve cover 143, and a spring 145.

[0051] Valve frame 141 can be mounted and secured to housing 110. Valve frame 141 may include passage 1415 communicating with internal space 119 of housing 110. Passage 1415 of valve frame 141 may be configured to communicate internal space 119 of housing 110 with external space.

[0052] The valve frame 141 may include an annular body 1411 connected to the housing 110 and a support structure 1413 extending inwardly from the annular body 1411. The passage 1415 of the valve frame 141 may include the hollow portion of the annular body 1411.

[0053] The valve cover 143 can move between a closed position and an open position according to the pressure inside the internal space 119 of the housing 110. When the exhaust valve 140 is closed, the valve cover 143 can be in the closed position. When the exhaust valve 140 is open, the valve cover 143 can be in the open position. The valve cover 143 can move linearly between the open and closed positions.

[0054] When the valve cover 143 is in the closed position, the valve cover 143 can close the passage 1415 of the valve frame 141 relative to the external space, so that the passage 1415 of the valve frame 141 is not connected to the external space. When the valve cover 143 is in the closed position, it can prevent gas from flowing between the internal space 119 of the housing 110 and the external space.

[0055] When the valve cover 143 is in the open position, the valve cover 143 can open the passage 1415 of the valve frame 141 relative to the external space, so that the passage 1415 of the valve frame 141 can communicate with the external space. When the valve cover 143 is in the open position, gas can flow from the internal space 119 of the housing 110 to the external space through the passage 1415 of the valve frame 141.

[0056] The valve cover 143 may include a baffle 1431 that covers and closes the passage 1415 of the valve frame 141 and a movable rod 1431 connected to the baffle 1431. A support structure 1413 may extend from the annular body 1411 toward the movable rod 1431 and support one side of the movable rod 1431, so that the movable rod 1431 can move linearly along a predetermined path.

[0057] Spring 145 can provide a restoring force to valve cover 143 in the direction from the open position to the closed position. For example, spring 145 can be a helical spring wound on moving rod 1431. Spring 145 can be disposed between the support structure 1413 of valve frame 141 and a stop protrusion disposed on the end of moving rod 1431. One end of spring 145 can be supported by the stop protrusion of moving rod 1431, and the other end of spring 145 can be supported by support structure 1413. When the pressure in the internal space 119 of housing 110 is less than or equal to a preset reference value, valve cover 143 can be fixed in the closed position and elastically supported by spring 145. When the pressure in the internal space 119 of housing 110 is greater than the preset reference value, valve cover 143 can gradually move in the direction from the closed position to the open position.

[0058] A valve cover 150 may be disposed within the internal space 119 of the housing 110 and at the inlet 149 of the exhaust valve 140. For example, the valve cover 150 may be fastened to the inside of the side frame 113 to cover the inlet 149 of the exhaust valve 140. The valve cover 150 may have a three-dimensional shape or a box shape. The valve cover 150 may provide a buffer space communicating with the passage of the exhaust valve 140. The valve cover 150 may be configured to block or inhibit the flow of high-temperature particles PC to the exhaust valve 140 in order to protect the exhaust valve 140 from the effects of high-temperature particles PC. High-temperature particles PC may include flames, vented materials, sparks, etc. generated during the ignition of the battery cell 131. Because the valve cover 150 blocks or inhibits the flow of high-temperature particles PC to the exhaust valve 140, the performance degradation of the exhaust valve 140 due to the accumulation of high-temperature particles PC in the passage of the exhaust valve 140 can be suppressed, and the external ignition of the battery device 10 due to the discharge of high-temperature particles PC to the outside through the exhaust valve 140 can be suppressed. In an embodiment, the battery device 10 may include a plurality of vent valves 140 and a plurality of valve protection covers 150, and each of the plurality of valve protection covers 150 may be configured to cover and protect a corresponding vent valve among the plurality of vent valves 140.

[0059] The valve cover 150 may be formed of a high-rigidity material (e.g., metal).

[0060] The valve cover 150 may include a front wall 151, a peripheral wall 152, and a flange 153. The valve cover 150 may have a single integrated structure in which the front wall 151, the peripheral wall 152, and the flange 153 are integrally formed.

[0061] The front wall 151 may face the inlet 149 of the exhaust valve 140. The front wall 151 may face the exhaust valve 140 in a first horizontal direction (e.g., the X-axis direction) and be in the form of a flat plate extending in a second horizontal direction (e.g., the Y-axis direction) and a vertical direction (e.g., the Z-axis direction). When viewed in the first horizontal direction (e.g., the X-axis direction), the front wall 151 may have a quadrilateral shape or a circular shape.

[0062] Peripheral wall 152 may extend along the periphery of front wall 151. Peripheral wall 152 may extend between each edge of front wall 151 and the inside of housing 110. Peripheral wall 152 may include a plurality of vent holes 155. The buffer space provided by valve cover 150 may communicate with the internal space 119 of housing 110 accommodating cell assembly 130 through the plurality of vent holes 155 of peripheral wall 152. Each of the plurality of vent holes 155 may be a through-hole penetrating peripheral wall 152. When front wall 151 faces vent valve 140 in a first horizontal direction (e.g., X-axis direction), the plurality of vent holes 155 may each penetrate peripheral wall 152 in a direction perpendicular to the first horizontal direction (e.g., X-axis direction).

[0063] A flange 153 may extend from the peripheral wall 152 and connect to the housing 110. The flange 153 may be in the form of a flat plate parallel to the surface of the portion of the housing 110 that connects to the valve cover 150. The extending direction of the flange 153 is substantially perpendicular to the extending direction of the peripheral wall 152. The flange 153 may be fastened to the housing 110 by a fastening member such as a bolt.

[0064] The front wall 151 of the valve cover 150 does not include an orifice allowing gas to flow through. High-temperature particles PC generated during thermal runaway in the battery cell 131 exhibit linearity. Because the valve cover 150 facing the inlet 149 of the exhaust valve 140 does not include an orifice, the high-temperature particles PC are blocked by the front wall 151 of the valve cover 150 and therefore do not reach the exhaust valve 140. Since the high-temperature particles PC do not reach the exhaust valve 140, performance degradation of the exhaust valve 140 due to the accumulation of high-temperature particles PC in the passage of the exhaust valve 140 can be suppressed, and external fires of the battery device 10 due to the release of high-temperature particles PC to the outside through the exhaust valve 140 can be suppressed.

[0065] The valve cover 150 prevents gas from flowing through the front wall 151 and allows gas to flow through multiple vent holes 155 in the peripheral wall 152. Gas generated in the internal space 119 of the housing 110 can reach the exhaust valve 140 through the multiple vent holes 155 in the peripheral wall 152 and the buffer space of the valve cover 150, and is discharged to the outside through the exhaust valve 140. Because the peripheral wall 152, which is difficult for only high-temperature particles PC to access, allows gas to escape within the valve cover 150, the arrival of high-temperature particles PC at the exhaust valve 140 can be effectively suppressed, while ensuring the exhaust path VG for venting the gas.

[0066] A porous filter 170 can be attached to a valve cover 150. The porous filter 170 can be positioned in the exhaust path VG provided by the valve cover 150 to filter out toxic and harmful substances contained in the gas. The porous filter 170 can be attached to a peripheral wall 152 to cover a plurality of exhaust holes 155 of the peripheral wall 152. The porous filter 170 can have a porous structure that allows gas to flow through it and collects toxic and harmful substances contained in the gas. For example, the porous filter 170 may include metal foam. After toxic and harmful substances generated during thermal runaway in the battery cell 131 are filtered out by the porous filter 170, the gas can reach the exhaust valve 140. Because the porous filter 170 filters out toxic and harmful substances, the emission of toxic and harmful substances to the outside of the battery device 10 can be prevented, thereby improving safety and environmental issues.

[0067] (Second Implementation)

[0068] Figure 6 This is a cross-sectional view of a portion of the battery device 10A according to an embodiment.

[0069] Reference Figure 1 and Figure 6 In the battery device 10A, the housing 110 may include a cooling channel 120 configured to allow cooling fluid to flow through it. The cooling channel 120 is a passageway within the housing 110. The cooling channel 120 may be disposed in the base frame 111 and the side frame 113. When cooling fluid flows along the cooling channel 120 of the housing 110, it can cool a plurality of cell assemblies 130 within the housing 110. The cooling fluid may include a coolant and / or a refrigerant.

[0070] In one embodiment, the valve cover 150A may include an internal channel 161 configured to allow cooling fluid to flow through it. The internal channel 161 of the valve cover 150A is a passageway within the valve cover 150. The internal channel 161 of the valve cover 150A may be disposed in the front wall 151, peripheral wall 152, and / or flange 153 of the valve cover 150A.

[0071] In one embodiment, the internal passage 161 of the valve cover 150A may communicate with the cooling passage 120 of the housing 110. Cooling fluid may flow between the internal passage 161 of the valve cover 150A and the cooling passage 120 of the housing 110. Cooling fluid may flow from the cooling passage 120 of the housing 110 to the inlet of the internal passage 161 of the valve cover 150A, flow along the internal passage 161 of the valve cover 150A, and be discharged into the cooling passage 120 of the housing 110 through the outlet of the internal passage 161 of the valve cover 150A.

[0072] For example, the internal channel 161 of the valve cover 150A and the cooling channel 120 of the housing 110 can be connected to each other at the interface between the flange 153 of the valve cover 150A and the housing 110. A sealing member such as a gasket can be provided at the interface between the flange 153 of the valve cover 150A and the housing 110 to prevent leakage of cooling fluid.

[0073] The peripheral portion of the valve cover 150A can be cooled during the flow of cooling fluid through the internal channel 161 of the valve cover 150A. During the flow of cooling fluid into the internal channel 161 of the valve cover 150A, the energy of high-temperature particles can be reduced or dissipated, thereby more effectively suppressing high-temperature particles from reaching the exhaust valve 140. Additionally, during the flow of cooling fluid into the internal channel 161 of the valve cover 150A, the high-temperature gas surrounding the valve cover 150A can be cooled, and heat transfer between the battery cells 131 caused by the high-temperature gas can be suppressed.

[0074] According to one embodiment, the battery device may include a valve protection cover configured to allow gas flow to the vent valve and suppress the arrival of high-temperature particles at the vent valve. Therefore, performance degradation of the vent valve due to particle accumulation in its passage can be suppressed, and external fires caused by high-temperature particles being released to the outside through the vent valve can be prevented.

[0075] According to one embodiment, the battery device includes a porous filter located in the venting path provided by the valve cover to filter toxic and harmful substances, thereby preventing the emission of toxic and harmful substances to the outside of the battery device.

[0076] According to the battery device of the embodiment, cooling fluid can flow into the internal channels of the valve protection cover to cool particles and gases around the valve protection cover. Therefore, it is possible to more effectively suppress high-temperature particles from reaching the exhaust valve and to suppress heat transfer between battery cells caused by high-temperature gases.

[0077] The present disclosure has been described in more detail above with reference to the accompanying drawings and embodiments. However, the configurations shown in the drawings or the embodiments described in this specification are merely examples of the present disclosure and do not reflect all the technical ideas of the present disclosure. Therefore, it should be understood that various equivalents and modifications to these configurations have been made as of the filing date of this application.

Claims

1. A battery device, the battery device comprising: A housing having an internal space for accommodating battery cells; An exhaust valve, which is installed in the housing and configured to discharge gas to the outside; as well as A valve protection cover, located at the inlet of the exhaust valve facing the interior space of the housing. The valve protection cover includes: Front wall, the front wall facing the inlet of the exhaust valve; and A peripheral wall extends along the periphery of the front wall and includes vent holes.

2. The battery device according to claim 1, wherein, The valve cover is configured to prevent gas from flowing through the front wall and allow the gas to flow through the vent hole of the peripheral wall.

3. The battery device according to claim 1, further comprising: A porous filter is attached to the peripheral wall to cover the vent holes of the peripheral wall.

4. The battery device according to claim 3, wherein, The porous filter contains metal foam.

5. The battery device according to claim 1, wherein, The front wall faces the exhaust valve in the first direction, and The vent hole of the peripheral wall penetrates the peripheral wall in a direction perpendicular to the first direction.

6. The battery device according to claim 1, wherein, The valve cover also includes a flange that extends from the peripheral wall and is fastened to the housing.

7. The battery device according to claim 1, wherein, The valve cover also includes an internal channel configured to allow cooling fluid to flow through it.

8. The battery device according to claim 7, wherein, The internal channel of the valve protective cover is located within the peripheral wall.

9. The battery device according to claim 7, wherein, The internal channel of the valve protective cover is disposed within the peripheral wall and the front wall.

10. The battery device according to claim 7, wherein, The housing includes cooling channels configured to allow cooling fluid to flow through them. The cooling channel of the housing is connected to the internal channel of the valve protection cover.

11. The battery device according to claim 10, wherein, The valve cover also includes a flange that extends from the peripheral wall and is fastened to the housing. The internal channel of the valve protective cover is disposed within the flange portion, and The cooling channel of the housing and the internal channel of the valve cover are connected at the interface between the flange of the valve cover and the housing.

12. The battery device according to claim 1, wherein, The exhaust valve is a safety valve configured to discharge gas to the outside according to the pressure level of the internal space of the housing.

13. The battery device according to claim 1, wherein, The valve cover is configured to prevent gas from flowing through the front wall and allow the gas to flow through the vent hole on the peripheral wall. The valve cover also includes an internal channel configured to allow cooling fluid to flow through it. The housing includes a cooling channel configured to allow cooling fluid to flow through it and to communicate with the internal channel of the valve cover. The battery device also includes a porous filter attached to the peripheral wall to cover the vent holes of the peripheral wall.

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