Battery pack with exhaust path

Abstract

The battery pack according to this disclosure includes: a plurality of battery modules, each battery module including a battery cell, a module housing housing the battery cell, and an exhaust passage communicating with the interior of the module housing; and a battery pack housing housing the plurality of battery modules and having a gas movement passage within a battery pack frame forming a wall, wherein the exhaust passage of each battery module is communicating with the gas movement passage.

Description

Technical Field

[0001] This disclosure relates to a battery pack, and more specifically, to a battery pack having an exhaust path that allows gases generated within the battery module to flow safely and efficiently outside the battery pack housing.

[0002] This application claims priority to Korean Patent Application No. 10-2021-0063730, filed on May 17, 2021, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference. Background Technology

[0003] Secondary batteries are gaining attention as a new environmentally friendly and energy-efficient energy source due to advantages such as significantly reducing the use of fossil fuels and producing no byproducts from energy use.

[0004] Therefore, secondary batteries are increasingly used in a wider range of device applications. For example, secondary batteries are not only widely used as a power source for multifunctional small products such as wireless mobile devices or wearable devices, but also as an energy or energy storage system (ESS) for electric vehicles and hybrid electric vehicles proposed as alternatives to gasoline and diesel vehicles.

[0005] In recent years, lithium-ion batteries have been widely used, with an operating voltage of approximately 2.5V to 4.5V for a single lithium-ion battery. Therefore, electric vehicles or energy storage systems that require high capacity and high output use battery packs as their power source. Battery packs consist of battery modules connected in series and / or in parallel, and each battery module includes lithium-ion batteries connected in series and / or in parallel.

[0006] Depending on the output or capacity of the battery pack required by the electric vehicle, the number of lithium secondary batteries in the battery module or the number of battery modules in the battery pack can be increased.

[0007] However, when the battery pack includes a large number of lithium secondary batteries, it is severely damaged in the event of a fire or explosion.

[0008] For example, when an accident such as a short circuit between lithium secondary batteries or an abnormal temperature rise occurs in any battery module, a large amount of exhaust gas is generated from the lithium secondary batteries. In addition to the exhaust gas, high-temperature sparks, including those from electrode active materials and aluminum particles, can be exacerbated when the degradation is severe. In this situation, the exhaust gas and high-temperature sparks can cause thermal damage to adjacent battery modules, and the risk of additional accidents to other battery modules is very high.

[0009] Therefore, when exhaust gases and high-temperature sparks are generated in any battery module, it is necessary to develop an exhaust path that allows the exhaust gases to flow quickly and safely outside the battery pack while minimizing the impact on other battery modules. Summary of the Invention

[0010] Technical issues

[0011] This disclosure is designed to address the aforementioned problems, and therefore aims to provide a battery pack with an exhaust path that, when exhaust gas or sparks are generated within any battery module, allows the exhaust gas to flow quickly and safely outside the battery pack housing while minimizing the impact on other battery modules.

[0012] The technical problems to be solved by this disclosure are not limited to those described above, and those skilled in the art can clearly understand these and other problems from the following detailed description.

[0013] Technical solution

[0014] According to this disclosure, a battery pack is provided, comprising: a plurality of battery modules, each battery module including a battery cell, a module housing housing the battery cell, and an exhaust channel communicating with the interior of the module housing; and a battery pack housing housing the plurality of battery modules and having a gas movement passage within a battery pack frame forming a wall, wherein the exhaust channel of each battery module is communicating with the gas movement passage.

[0015] The exhaust passage may include: a pipe with a hollow structure, a gas inlet disposed on one surface of the pipe, and a gas outlet disposed on another surface of the pipe at a predetermined distance from the gas inlet in the direction of extension of the pipe.

[0016] The gas inlet can be matched with a first opening provided in the module housing, and the gas outlet can be matched with a suction port provided in the battery pack frame.

[0017] The pipe may include multiple partitions to divide the internal space of the pipe.

[0018] The conduit may include a plurality of narrow passages extending along the length direction between the plurality of separators.

[0019] The battery pack frame forming the wall may include a left-side frame forming the left wall of the battery pack housing and a right-side frame forming the right wall of the battery pack housing.

[0020] Each of the left and right frames may include: a vertical frame portion extending along the height direction of the battery module, and a module connection frame portion extending horizontally from the vertical frame portion and connected to the exhaust channel.

[0021] The gas movement passage may be located in the module connecting frame, and one end of the module connecting frame may have an open structure to communicate with outdoor air.

[0022] The exhaust passage may be on the module housing, and the module connecting frame may be on the exhaust passage and configured to communicate with the exhaust passage.

[0023] The exhaust passage may be on the module housing, and the module connecting frame may be on the side of the exhaust passage and configured to communicate with the exhaust passage.

[0024] The battery unit may include a first group of battery units and a second group of battery units, with a firewall inserted between the first group of battery units and the second group of battery units, and the firewall may divide the internal space of the module housing.

[0025] The first opening may include an opening 1_1 on the top left side of the module housing and an opening 1_2 on the top right side of the module housing, with the firewall as a reference, and the gas inlet may include a first gas inlet matching the opening 1_1 and a second gas inlet matching the opening 1_2.

[0026] The gas outlet may include a first gas outlet in the left edge region of the pipeline and a second gas outlet in the right edge region of the pipeline.

[0027] The first opening can be closed by a cap made of hot-melt material.

[0028] The module housing and the exhaust channel can be integrally formed.

[0029] According to another aspect of this disclosure, a vehicle including the battery pack is provided.

[0030] Beneficial effects

[0031] According to one aspect of this disclosure, a battery pack with an exhaust path is provided that, when exhaust gas or sparks are generated in any battery module, the exhaust path allows the exhaust gas to flow quickly and safely outside the battery pack housing while minimizing the impact on other battery modules.

[0032] Specifically, each battery module has an exhaust channel attached to the housing or integrally formed therein, the exhaust channel communicating with the interior of the module, and the battery pack frame forming the wall of the battery pack housing has a hollow structure that provides a passage for gas movement.

[0033] The venting channels of each battery module and the battery pack frame of the battery pack housing are interconnected. Therefore, when gas is generated from each battery module, the gas can flow out of the battery pack housing along the gas movement paths of the venting channels and the battery pack frame. In this case, the gas does not diffuse into the battery pack housing, thus preventing adjacent battery modules from suffering thermal damage due to gas.

[0034] Furthermore, according to one aspect of this disclosure, the exhaust passage includes: a pipe with a hollow structure, a gas inlet disposed on one surface of the pipe, and a gas outlet disposed at a predetermined distance from the gas inlet on another surface of the pipe, thereby preventing sparks or flames from inside the battery module from entering the exhaust passage. Therefore, it is possible to prevent high-temperature sparks or flames from escaping from the battery pack housing while allowing gas generated from each battery module to flow outside the battery pack housing.

[0035] In addition, this disclosure uses the battery pack frame of the battery pack housing to realize the exhaust path, which reduces the number of parts and simplifies the assembly process compared to an exhaust path that is realized by adding a separate component to the internal space of the battery pack housing, and is more efficient in terms of space utilization.

[0036] The effects of this disclosure are not limited to those described above, and those skilled in the art can clearly understand these and other effects from this specification and the accompanying drawings. Attached Figure Description

[0037] Figure 1 This is a schematic perspective view of a battery pack according to one embodiment of the present disclosure.

[0038] Figure 2 yes Figure 1 A partial exploded perspective view of the battery pack.

[0039] Figure 3 yes Figure 1 A conceptual diagram of the exhaust path for the battery pack.

[0040] Figure 4 This is a perspective view of a battery module according to one embodiment of the present disclosure.

[0041] Figure 5 yes Figure 4 An exploded perspective view of the main components of the battery module.

[0042] Figure 6 It is shown Figure 4A diagram showing the bottom of the battery module.

[0043] Figure 7 yes Figure 5 Partial cross-sectional perspective view of the exhaust passage in section A.

[0044] Figure 8 yes Figure 5 Bottom view of the exhaust passage.

[0045] Figure 9 yes Figure 5 A plan view of the exhaust passage.

[0046] Figure 10 This is a diagram showing the first opening of the module housing according to one embodiment of the present disclosure.

[0047] Figure 11 This is an enlarged view of the gas outlet of a battery module according to an embodiment of this disclosure.

[0048] Figure 12 This shows the connection to the right frame of the battery pack housing. Figure 10 A diagram of the battery module.

[0049] Figure 13 This is a partial cross-sectional view of a battery pack according to an embodiment of the present disclosure, illustrating the venting path between the battery module and the battery pack housing.

[0050] Figure 14 yes Figure 13 A magnified view of part B in the image.

[0051] Figure 15 yes Figure 13 A magnified view of part C in the image.

[0052] Figure 16 This is an enlarged view of the gas outlet of a battery module according to another embodiment of this disclosure.

[0053] Figure 17 This shows the connection to the right frame of the battery pack housing. Figure 16 A diagram of the battery module.

[0054] Figure 18 It is intercepted along line D-D'. Figure 17 Cross-sectional view. Detailed Implementation

[0055] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terms or words used in the specification and appended claims should not be construed as limited to their general or dictionary meanings, but rather interpreted based on their meanings and concepts corresponding to the technical aspects of the present disclosure, on the basis of allowing the inventors to appropriately define the terms used for best interpretation. Therefore, the embodiments described herein and the illustrations shown in the accompanying drawings are merely exemplary embodiments of the present disclosure and are not intended to fully describe the technical aspects of the present disclosure. Thus, it should be understood that various other equivalents and modifications may be made at the time of filing this application.

[0056] Figure 1 This is a schematic perspective view of a battery pack according to one embodiment of the present disclosure. Figure 2 yes Figure 1 A partial exploded perspective view of the battery pack. Figure 3 yes Figure 1 A conceptual diagram of the exhaust path for the battery pack.

[0057] like Figure 1 and Figure 2 As shown, a battery pack 10 according to an embodiment of the present disclosure includes: a plurality of battery modules 100; and a battery pack housing 200 for accommodating the plurality of battery modules 100, wherein the two upper ends of each battery module 100 are connected to battery pack frames 230 and 240, the battery pack frames 230 and 240 having a hollow structure for venting gas when gas is generated from each battery module 100.

[0058] As described in detail below, the battery pack 10 of this disclosure is designed to allow gases generated from each battery module 100 to be discharged through the interior of the battery pack frame connected to each battery module 100, such as... Figure 3 As shown in the diagram, when high-temperature gas is generated from any battery module 100, the battery pack 10 vents the gas while preventing it from diffusing into other battery modules 100 within the battery pack housing 200, thus making the possibility of additional accidents occurring to other battery modules 100 very low.

[0059] The battery module 100 and battery pack housing 200 of this disclosure, which are used to implement the exhaust path, will be described in detail below.

[0060] Figure 4 This is a perspective view of a battery module 100 according to one embodiment of the present disclosure. Figure 5 yes Figure 4 Exploded perspective view of the main parts of the battery module 100. Figure 6 It is shown Figure 4 A diagram showing the bottom of the battery module. Figure 7 yes Figure 5Partial cross-sectional perspective view of the exhaust passage in section A.

[0061] As shown in the figure, the battery module 100 according to one embodiment of the present disclosure includes: a plurality of battery cells 110, a module housing 120, a firewall 130, a heat sink 140, and an exhaust channel 150.

[0062] Battery cell 110 may include a pouch cell 110 with high energy density and easy stacking. For example... Figure 5 As shown, the pouch-type battery cells 110 can stand upright in the vertical direction (Z-axis direction) and be stacked in the horizontal direction (Y-axis direction) to form a cell stack. In contrast to this embodiment, the battery module 100 may include prismatic battery cells 110 in a rectangular prism shape or cylindrical battery cells 110.

[0063] The module housing 120 is a component for housing multiple battery cells 110 and is formed using a material with high mechanical strength in a hermetically sealed structure to protect the multiple battery cells 110 from external physical and chemical factors. The module housing 120 may include a lower housing 121 covering the lower portion of the battery cells 110 and an upper housing 122 covering the upper portion of the battery cells 110. The upper housing 122 and the lower housing 121 may be in the shape of generally U-shaped plates and are joined together by bolts and / or welding.

[0064] In most cases, a conventional battery module (not shown) includes a stack of cells housed in a module housing, while the battery module 100 of this embodiment includes a plurality of stacks of cells housed in a module housing 120.

[0065] For example, such as Figure 5 As shown, the battery unit 110 is divided into a first group of battery units G1 forming a unit stack and a second group of battery units G2 forming another unit stack. The first group of battery units G1 and the second group of battery units G2 can be accommodated in the module housing 120 with a firewall 130 inserted between them.

[0066] The first battery unit G1 is located in one space of the lower housing 121, which is divided by the firewall 130, and the second battery unit G2 is located in another space of the lower housing 121. Each of the first battery unit G1 and the second battery unit G2, positioned as described above, can be accommodated in each of two hermetically sealed spaces surrounded by the upper housing 122, the lower housing 121, and the firewall 130, while being covered by the upper housing 122.

[0067] Here, firewall 130 refers to a plate-shaped structure that divides the internal space of module housing 120 into two physically separate spaces. Firewall 130 may be made of, for example, refractory or rigid material, and may have two sheets with refractory material (e.g., mica) attached to their surfaces. Firewall 130 blocks heat transfer between the first battery cell G1 and the second battery cell G2, and prevents module housing 120 from sagging in the center due to its top and bottom connections to the center of upper housing 122 and lower housing 121, respectively.

[0068] Although not shown, for example, the upper housing 122 may have an opening in a portion of the central side region. The opening can be used to install a connection device for electrically connecting the first battery cell G1 to the second battery cell G2. The connection device may include a metal rod-shaped busbar, and the opening can be closed after the connection device is installed.

[0069] According to this embodiment, a battery module 100 can have a capacity, for example, comparable to two battery modules 100 each comprising a unit stack housed in a module housing 120, in a more compact volume. Furthermore, when manufacturing a battery pack 10 using the battery module 100 according to this embodiment, the lateral (X-axis) width of the battery pack housing 200 can be advantageously reduced.

[0070] The heat sink 140 can be located at the bottom of the module housing 120, in other words, on the lower surface of the lower housing 121, such as... Figure 6 As shown in the diagram. Here, heat sink 140 refers to a cooling component that absorbs heat through direct contact with battery cell 110. Heat sink 140 may be configured as an aluminum plate having internal flow channels, and as shown in this embodiment, may be included in the lower housing 121 or may be attached to the bottom of the lower housing 121 if a heat transfer material is present on the contact surface between heat sink 140 and the lower housing 121.

[0071] The exhaust passage 150 is used to discharge exhaust gases from the battery module 100, and one side of the exhaust passage 150 is in communication with the interior of the module housing 120 and the other side is in communication with the atmosphere. The exhaust passage 150 may be attached to the outside of the module housing 120 or may be integrally formed with the module housing 120.

[0072] The exhaust channel 150 of this embodiment may have a hollow, flat rectangular box shape with dimensions approximately corresponding to the upper surface of the upper housing 122, and may be attached to the top of the module housing 120. The exhaust channel 150 is preferably made of a refractory material to prevent deformation caused by high-temperature gases or high-temperature sparks.

[0073] More specifically, refer to Figure 5 and Figures 7 to 9The exhaust passage 150 includes: a pipe 151 with a hollow structure; a gas inlet 152 corresponding to a hole for gas to enter the pipe 151; and a gas outlet 153 corresponding to a hole for gas to leave the pipe 151.

[0074] The conduit 151 has a length and width corresponding to the length and width of the upper surface of the module housing 120, and the conduit 151 is hollow to allow gas to flow inside. In addition, the conduit 151 may include a plurality of partitions 154, which are separated from each other in the width direction and extend in the length direction to divide the internal space of the conduit 151.

[0075] For example, such as Figure 7 As shown, the interior of the pipe 151 is divided by partitions 154, and narrow passages 157 are formed between the partitions 154. Multiple narrow passages 157 can effectively increase the gas flow velocity. Additionally, the narrow passages 157 can effectively restrict the movement of high-temperature sparks or flames. Furthermore, a metal mesh (not shown) can be placed in the narrow passages 157 or the gas inlet 152 to further restrict the movement of high-temperature sparks or flames.

[0076] Gas inlet 152 may be located on the lower surface of pipe 151 and may be configured to match a first opening 123 located on the top of module housing 120.

[0077] More specifically, such as Figure 8 As shown, the gas inlet 152 is an elongated hole in the width direction in the central region of the lower surface of the pipe 151, and includes a first gas inlet 152a and a second gas inlet 152b separated from each other by a predetermined distance.

[0078] like Figure 10 As shown, the first opening 123 of the module housing 120 includes an opening 1_1 123a located on the top left side of the module housing 120 with reference to the firewall 130 inside the module housing 120, and an opening 1_2 123b located on the top right side of the module housing 120.

[0079] When the exhaust passage 150 is attached to the module housing 120, the first gas inlet 152a can be matched with the 1_1 opening 123a, and the second gas inlet 152b can be matched with the 1_2 opening 123b.

[0080] Therefore, the gas and high-temperature spark generated from the first battery cell G1 can enter the pipe 151 through the 1_1 opening 123a and the first gas inlet 152a. In this case, since the vertical top of the first gas inlet 152a is closed, the gas entering the first gas inlet 152a through the 1_1 opening 123a can move horizontally, but the high-temperature spark or flame can move downwards back to the module housing 120 or move very little horizontally.

[0081] Additionally, firewall 130 blocks the transfer of heat, gas, and high-temperature sparks generated from the first battery cell G1 to the second battery cell G2, and the barrier 151a between the first gas inlet 152a and the second gas inlet 152b prevents heat, gas, and high-temperature sparks generated from the first battery cell G1 from moving to the second battery cell G2 via pipe 151 (see...). Figure 14 ).

[0082] The first opening 123 may be closed by a cover (not shown) made of a hot-melt material (e.g., rubber or plastic) that can be melted by gas or a high-temperature spark. The cover may be configured to close the first opening 123 during normal operation to prevent impurities from entering the module housing 120, and may be configured to open the first opening 123 only when gas or a high-temperature spark is generated. However, the cover may be replaced by a mesh and may be omitted if necessary.

[0083] In this embodiment, a gas outlet 153 may be disposed on the upper surface of the conduit 151. The gas outlet 153 may include a first gas outlet 153a and a second gas outlet 153b. The gas outlet 153 may be configured to mate with a suction port 244 disposed in the battery pack frames 230 and 240.

[0084] In order to connect with the battery pack frames 230 and 240, the first gas outlet 153a is at a predetermined distance from the first gas inlet 152a in the left extension direction (-X direction) of the pipe 151, and the second gas outlet 153b is at a predetermined distance from the second gas inlet 152b in the right extension direction (+X direction) of the pipe 151.

[0085] For example, such as Figure 9 and Figure 11 As shown, the first gas outlet 153a may be an elongated hole extending in the width direction (Y-axis direction) at the left edge region of the upper surface of the pipe 151, and the second gas outlet 153b may be an elongated hole extending in the width direction at the right edge region of the upper surface of the pipe 151.

[0086] The battery pack frame refers to the left frame 230 that forms the left wall of the battery pack housing 200 and the right frame 240 that forms the right wall of the battery pack housing 200.

[0087] The battery pack housing 200 is used to house the battery module 100 (see...) Figure 1 and Figure 2 The components may include: a base plate 210 and a top plate 220 respectively attached to the bottom and top of the left frame 230 and the right frame 240, a front cover 250 forming the front wall of the battery pack housing 200, and a rear cover 260 forming the rear wall.

[0088] In particular, the left frame 230 and the right frame 240 are key components forming the exhaust path of the battery pack 10 and have gas movement passages FP communicating with the exhaust channel 150. The left frame 230 and the right frame 240 can be formed by extrusion molding, and the left frame 230 and the right frame 240 can have open ends on the front cover 250 side of the battery pack housing 200 and closed ends on the rear cover 260 side. Therefore, the gas generated from each battery module 100 can be guided to leave the battery pack housing 200 via the exhaust channel 150 and the gas movement passages FP of the left frame 230 or the right frame 240.

[0089] Since the left frame 230 and the right frame 240 have roughly the same structure, the following description is based on the right frame 240.

[0090] like Figure 12 As shown, the right frame 240 may include: a vertical frame portion 241 extending along the height direction of the battery module 100, and a module connection frame portion 242 extending horizontally from the vertical frame portion 241 and connected to the exhaust channel 150.

[0091] The hollow module connection frame 242 has a gas movement passage FP. Additionally, the module connection frame 242 includes a plurality of suction ports 244 arranged at predetermined intervals along its length (Y-axis direction) and an outlet O at one end on one side of the front cover 250. Each suction port 244 can be matched with a gas outlet 153 of the exhaust passage 150 of each battery module 100. Gaskets can be applied to the contact interface between each suction port 244 and the gas outlet 153 for sealing and anti-slip purposes. Furthermore, a metal mesh can be applied to each suction port 244 to prevent high-temperature sparks or flames from escaping.

[0092] Reference Figures 13 to 15 As described, in this embodiment, the module connecting frame portion 242 of the right frame 240 is located on the exhaust channel 150. In other words, one end of the module connecting frame portion 242 is placed on the right edge of the upper surface of the pipe 151, and the suction port 244 is perpendicularly matched with the second gas outlet 153b and communicates with the exhaust channel 150.

[0093] For example, gas generated from the second battery cell G2 can enter the exhaust channel 150 through the 1_2 opening 123b, move horizontally to the right along the pipe 151, move upward from the second gas outlet 153b and enter the right side frame 240. Additionally, the gas can move along the gas movement path FP of the right side frame 240 to the front cover 250 of the battery pack housing 200 and exit the battery pack housing 200 through the outlet O of the module connection frame portion 242.

[0094] On the other hand, the vertical connection structure between the opening 123b and the second gas inlet 152b prevents high-temperature sparks or flames generated from the second battery cell G2 from escaping, the multiple narrow passage structures within the pipe 151 restrict the movement of high-temperature sparks or flames, and the vertical connection structure and mesh between the second gas outlet 153b and the suction port 244 further prevent high-temperature sparks or flames from escaping. Therefore, high-temperature sparks or flames can be prevented from escaping from the battery pack housing 200, thereby significantly reducing the risk of fire outside the battery pack 10.

[0095] Subsequently, refer to Figures 16 to 18 A battery pack 10 according to another embodiment of the present disclosure is described.

[0096] The same reference numerals as in the previous embodiments denote the same elements. To avoid repetition, descriptions of the same elements are omitted, and the following description is based on the differences between this embodiment and the previous embodiments.

[0097] Compared with the previous embodiment, the battery pack 10 according to this embodiment is basically the same as the previous embodiment, except for the connection structure between the exhaust channel 150A and the module connection frame portion 242A.

[0098] According to another embodiment of the present disclosure, the exhaust passage 150A is located on the module housing 120, and the module connecting frame portion 242A is located on the side of the exhaust passage 150A and configured to communicate with the exhaust passage 150A.

[0099] Specifically, the exhaust passage 150A in this embodiment can be a generally flat trapezoidal box shape, where the pipe 151 has two slopingly cut-off edge regions. Additionally, the gas outlet 153 can be located on the slope connecting the upper and lower surfaces of the pipe 151. Here, the slope of the pipe 151 corresponds to the side surface of the exhaust passage 150A.

[0100] The module connecting frame portion 242A may have an inclined cut-off edge region that contacts the side of the exhaust passage 150A. Additionally, the suction port 244 of the module connecting frame portion 242A is located on the inclined cut-off slope.

[0101] With the above structure, one end of the module connecting frame 242A is connected to the side of the exhaust channel 150A, and the gas outlet 153 and the suction port 244 are connected to each other.

[0102] This implementation is highly advantageous for the interface dimensions between the battery module 100 and the battery pack frames 230 and 240.

[0103] from Figure 15 and Figure 18 A comparison shows that, compared to the previous embodiment, this embodiment can easily reduce the height of the top plate 220 and reduce the width direction (X-axis direction) length of the module connecting frame portion 242. Furthermore, according to this embodiment, since the two sides of the exhaust channel 150A are supported by the module connecting frame portions 242A of the left frame 230 and the right frame 240, it can prevent the exhaust channel 150A from moving left or right from its position when subjected to external impact or vibration.

[0104] As described above, according to the structure of the battery pack 10 of this disclosure, when exhaust gas or high-temperature sparks are generated in any battery module 100, the high-temperature sparks can be prevented from leaving and the exhaust gas can be allowed to flow quickly and safely outside the battery pack housing 200 while minimizing the impact on other battery modules 100.

[0105] The battery pack according to this disclosure can be used in vehicles such as electric vehicles or hybrid electric vehicles. That is, vehicles according to this disclosure may include the battery pack according to this disclosure. The battery pack may be installed in the body frame under the vehicle seats or trunk, and if necessary, the battery pack may be installed in the vehicle with the top plate of the battery pack housing inverted.

[0106] In addition, the terms indicating direction used herein, such as up, down, left, right, front, and back, are for ease of description only, and it will be apparent to those skilled in the art that these terms may vary depending on the position of the element or the observer.

[0107] Although the present disclosure has been described above with reference to a limited number of embodiments and accompanying drawings, the present disclosure is not limited thereto, and it will be apparent to those skilled in the art that various modifications and variations can be made to the technical aspects of the present disclosure and to the scope of the appended claims and their equivalents.

Claims

1. A battery pack, comprising: Multiple battery modules, each battery module including a battery cell, a module housing housing the battery cell, and an exhaust channel communicating with the interior of the module housing; and A battery pack housing that accommodates the plurality of battery modules and has gas movement pathways within a battery pack frame forming walls. The exhaust channel of each battery module is connected to the gas movement path. The exhaust passage includes: a pipe with a hollow structure, a gas inlet disposed on one surface of the pipe, and a gas outlet disposed on another surface of the pipe at a predetermined distance from the gas inlet in the extending direction of the pipe. The gas inlet is matched with a first opening in the module housing, and the gas outlet is matched with a suction port in the battery pack frame. The battery unit includes a first group of battery units and a second group of battery units, with a firewall inserted between the first group of battery units and the second group of battery units. The firewall divides the internal space of the module housing. The first opening includes an opening 1_1 on the top left side of the module housing and an opening 1_2 on the top right side of the module housing, with the firewall as a reference. The gas inlet includes a first gas inlet that matches the opening 1_1 and a second gas inlet that matches the opening 1_2, and A blocking element is provided between the first gas inlet and the second gas inlet to prevent heat, gas and high-temperature sparks generated from the first battery cell from moving to the second battery cell via the pipe.

2. The battery pack according to claim 1, wherein the conduit includes a plurality of partitions to divide the internal space of the conduit.

3. The battery pack of claim 2, wherein the conduit comprises a plurality of narrow passages extending along the length direction between the plurality of separators.

4. The battery pack of claim 1, wherein the battery pack frame forming the wall includes a left side frame forming the left wall of the battery pack housing and a right side frame forming the right wall of the battery pack housing.

5. The battery pack of claim 4, wherein each of the left frame and the right frame comprises: A vertical frame portion extending along the height direction of the battery module, and a module connection frame portion extending horizontally from the vertical frame portion and connected to the exhaust channel.

6. The battery pack according to claim 5, wherein the gas movement passage is in the module connection frame portion, and one end of the module connection frame portion has an open structure to communicate with outdoor air.

7. The battery pack of claim 5, wherein the exhaust passage is on the module housing, and the module connecting frame portion is on the exhaust passage and configured to communicate with the exhaust passage.

8. The battery pack of claim 5, wherein the exhaust passage is on the module housing, and the module connecting frame portion is on the side of the exhaust passage and configured to communicate with the exhaust passage.

9. The battery pack of claim 1, wherein the gas outlet comprises a first gas outlet in the left edge region of the conduit and a second gas outlet in the right edge region of the conduit.

10. The battery pack of claim 1, wherein the first opening is closed by a cap made of a thermoplastic material.

11. The battery pack according to claim 1, wherein the module housing and the exhaust channel are integrally formed.

12. A vehicle comprising a battery pack according to any one of claims 1 to 11.

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