Battery pack and motor vehicle including the same

Abstract

The present invention discloses a battery pack configured to discharge high-temperature gas to the outside of the battery pack without affecting other adjacent battery modules when gas is generated inside a battery module. The battery pack according to one aspect of the present invention includes a pack housing having a first accommodating space and a second accommodating space spaced apart from the first accommodating space, a plurality of first battery modules disposed in the first accommodating space, a plurality of second battery modules disposed in the second accommodating space, and a pack cover configured to include a plurality of first independent vent passages configured to guide vent gas generated in each of the plurality of first battery modules to the outside of the pack housing and a plurality of second independent vent passages configured to guide vent gas generated in each of the plurality of second battery modules to the outside of the pack housing.

Description

Technical Field

[0001] The present invention relates to a battery pack and an automobile including the same, and more particularly, to a battery pack configured such that when gas is generated inside a battery module, the high-temperature gas is discharged to the outside of the battery pack without affecting other adjacent battery modules, and an automobile including the same.

[0002] This application claims priority based on Korean Patent Application No. 10-2022-0011080 filed on January 25, 2022, and all of the contents disclosed in the specification and drawings of the application are incorporated into this application.

Background Art

[0003] Recently, the demand for portable electronic products such as notebook PCs, video cameras, and mobile phones has increased rapidly, and as the commercialization of robots, electric vehicles, etc. has been in full swing, research on high-performance secondary batteries capable of repeated charging and discharging has been actively conducted.

[0004] Currently, commercialized secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, lithium secondary batteries, etc. Among these, lithium secondary batteries have attracted attention because they hardly cause a memory effect compared to nickel-based secondary batteries, can be freely charged and discharged, have a very low self-discharge rate, and have a high energy density.

[0005] Such lithium secondary batteries mainly use lithium-based oxides and carbon materials as the positive electrode active material and the negative electrode active material, respectively. In addition, a lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate each coated with a positive electrode active material and a negative electrode active material are arranged with a separator interposed therebetween, and an exterior material that seals and houses the electrode assembly together with an electrolytic solution, that is, a battery case.

[0006] Generally, lithium secondary batteries can be classified into a can-type secondary battery in which the electrode assembly is built into a metal can and a pouch-type secondary battery in which the electrode assembly is built into a pouch made of an aluminum laminate sheet according to the shape of the exterior material.

[0007] Recently, secondary batteries are widely used not only for small devices such as portable electronic devices but also for medium to large devices such as electric vehicles and energy storage systems (ESS) for driving or energy storage. A plurality of such secondary batteries can be housed together inside a module case in an electrically connected state to form a single battery module. And such battery modules are electrically further connected in a narrow space to increase the energy density to form a battery pack.

[0008] However, when a plurality of battery modules exist in a densely packed state in a narrow space like this, they can become vulnerable to accidents such as fires and explosions. For example, when a thermal event such as thermal runaway occurs in any one of the battery modules, high-temperature gas can be discharged from the battery module. If such gas cannot be properly discharged to the outside of the battery pack, the thermal event generated in some of the battery modules can spread to other battery modules provided inside the battery pack, and a chain reaction can occur. Also, in this case, the internal pressure of the battery pack increases, and there is a possibility of explosion. When the battery pack explodes, it not only causes great damage to surrounding devices and users due to the explosion pressure but also the damage range and speed can further increase. Therefore, when an abnormality occurs in some of the battery modules and gas is discharged, there is a need to develop a battery pack having a structure in which the high-temperature gas is safely discharged to the outside of the battery pack without affecting other adjacent battery modules.

Summary of the Invention

Problems to be Solved by the Invention

[0009] The present invention has been made in view of the above problems, and an object thereof is to safely discharge high-temperature vent gas ejected during the occurrence of a thermal event in some battery modules to the outside of the battery pack without affecting other battery modules inside the battery pack.

[0010] Another object of the present invention is to further add a vent flow path forming structure to a conventional battery pack to control the flow of vent gas in a desired direction.

[0011] However, the technical problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description of the invention.

Means for Solving the Problems

[0012] A battery pack according to one aspect of the present invention for achieving the above object includes a pack housing having a first accommodation space and a second accommodation space located apart from the first accommodation space, a plurality of first battery modules disposed in the first accommodation space, a plurality of second battery modules disposed in the second accommodation space, a plurality of first independent vent flow paths configured to guide vent gas generated by each of the plurality of first battery modules to the outside of the pack housing, and a plurality of second independent vent flow paths configured to guide vent gas generated by each of the plurality of second battery modules to the outside of the pack housing, and may include a pack cover.

[0013] The plurality of first independent vent flow paths may include a first side vent flow path configured to guide vent gas generated by each of the plurality of first battery modules in a first direction toward the second accommodation space, and a first center vent flow path communicating with the first side vent flow path and configured to guide vent gas generated by each of the plurality of first battery modules in a second direction perpendicular to the first direction.

[0014] The plurality of second independent vent channels may include a second side vent channel that guides vent gas generated in each of the plurality of second battery modules in a third direction toward the first accommodation space, and a second center vent channel that communicates with the second side vent channel and guides vent gas generated in each of the plurality of second battery modules in a fourth direction perpendicular to the third direction.

[0015] The pack cover may include guide portions provided at positions corresponding to positions between the plurality of first independent vent channels adjacent to each other and at positions corresponding to positions between the plurality of second independent vent channels adjacent to each other.

[0016] The guide portions may be configured to block communication between the plurality of first independent vent channels adjacent to each other and communication between the plurality of second independent vent channels adjacent to each other.

[0017] The pack cover may include guide portions provided at positions corresponding to positions between the plurality of first independent vent channels adjacent to each other and at positions corresponding to positions between the plurality of second independent vent channels adjacent to each other, a cover plate configured to cover the accommodation space of the pack housing, and flow path covers provided at positions corresponding to positions between the first accommodation space and the first center vent channel and between the second accommodation space and the second center vent channel, respectively, and configured such that the guide portions are attached thereto.

[0018] The first independent vent channel and the second independent vent channel may each have a groove form formed on the inner surface of the cover plate.

[0019] The battery pack may include first partition walls disposed at positions corresponding to positions between the first battery modules adjacent to each other and at positions corresponding to positions between the second battery modules adjacent to each other.

[0020] The battery pack may include a second partition wall disposed at a position corresponding to a position between the first accommodation space and the second accommodation space.

[0021] The first partition wall can be configured to block the movement of vent gas between the accommodation spaces of the respective first battery modules adjacent to each other and the movement of vent gas between the accommodation spaces of the respective second battery modules adjacent to each other.

[0022] The second partition wall can be configured to block the movement of vent gas between the first accommodation space and the second accommodation space.

[0023] The battery pack may include a sealing member at least at one of the spaces between the first partition wall and the pack cover and between the first partition wall and the pack housing.

[0024] The pack housing may include a gas collection space formed at at least one of one side and the other side.

[0025] The battery pack may include a vent device configured to discharge the vent gas in the gas collection space to the outside of the pack housing.

[0026] An automobile according to an embodiment of the present invention for achieving the above object includes the battery pack according to the present invention.

Effects of the Invention

[0027] According to one aspect of the present invention, when a thermal event occurs in some of the battery modules, the high-temperature vent gas ejected can be safely discharged to the outside of the battery pack without affecting other battery modules inside the battery pack.

[0028] According to another aspect of the present invention, in a normal case, a vent flow path can be formed in a pack cover that is only used for covering the pack housing, and a function of controlling the flow of vent gas can be added.

[0029] According to still another aspect of the present invention, vent gases generated in each battery module can be discharged with a time difference by being discharged through vent channels having different lengths respectively.

[0030] According to still another aspect of the present invention, by applying the channel cover, it is possible to prevent the vent gas from moving downward and affecting other adjacent battery modules during the process of discharging the vent gases generated in the plurality of battery modules through the first center vent channel and the second center vent channel respectively.

[0031] According to still another aspect of the present invention, between the accommodation spaces of each of the first battery modules adjacent to each other by the partition wall and between the accommodation spaces of each of the second battery modules adjacent to each other, they are structurally isolated from each other, thereby preventing the vent gas generated in some battery modules from moving to the adjacent battery module side.

[0032] According to still another aspect of the present invention, the first partition wall and / or the second partition wall have substantially the form of a beam with an empty internal space, whereby, in addition to improving the rigidity of the battery pack and the effect of blocking the movement of vent gas between adjacent accommodation spaces, the effect of reducing the weight of the battery pack can be obtained.

[0033] According to still another side of the present invention, the effect of preventing the movement of vent gas into the gap between the partition wall and the pack cover and / or the pack housing is further improved.

[0034] According to still another aspect of the present invention, when a large amount of gas is generated at once and the internal pressure of the battery pack increases, the internal pressure of the battery pack can be rapidly reduced by the gas collection space. The vent device can discharge the gas in the intended direction, and by increasing the capacity that the vent device can handle or increasing the number, even if a large amount of vent gas is generated instantaneously, the gas can be discharged more rapidly and smoothly.

[0035] However, the technical problems to be solved by the present invention are not limited to the above-described effects, and other problems of the present invention not mentioned will be clearly understood by those skilled in the art from the following description of the invention.

[0036] The following drawings attached to this specification illustrate desirable embodiments of the present invention and serve to further understand the technical idea of the present invention together with the detailed description of the invention. Therefore, the present invention should not be construed as being limited only to the matters described in the drawings.

Brief Description of the Drawings

[0037]

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Embodiments for Carrying Out the Invention

[0038] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The drawings attached to this specification illustrate preferred embodiments of the present invention, and in order to further understand the technical idea of the present invention together with the detailed description of the invention to be described later, the present invention should not be construed as being limited only to the matters described in such drawings. The same reference numerals indicate the same components. Also, in the drawings, the thickness, ratio, and dimensions of the components may be exaggerated for an effective explanation of the technical content.

[0039] The terms and words used in this specification and the claims should not be construed as being limited to their ordinary or dictionary meanings. The inventor himself must interpret them according to the meaning and concept corresponding to the technical idea of the present invention in accordance with the principle that he can appropriately define the concept of the terms in order to explain the invention in the best way.

[0040] In addition, in this specification, terms indicating directions such as up, down, left, right, front, and back are used, but such terms indicate relative positions and are only for the convenience of explanation. It is self-evident to those skilled in the art that they can change depending on the position of the object to be described, the position of the observer, etc.

[0041] Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most desirable embodiments of the present invention and do not represent all of the technical ideas of the present invention. It must be understood that there can be various equivalents and modifications that can replace these at the time of this application.

[0042] FIG. 1 is an exploded perspective view showing a battery pack according to the present invention. FIG. 2 is a perspective view showing the appearance of the battery pack according to the present invention.

[0043] Referring to FIGS. 1 and 2, a battery pack 10 according to the present invention includes a pack housing 100, a first battery module 210, a second battery module 220, and a pack cover 300.

[0044] The pack housing 100 may include a first accommodation space 110 and a second accommodation space 120 that is spaced apart from the first accommodation space 110. However, the accommodation space provided in the pack housing 100 is not limited to only the first accommodation space 110 and the second accommodation space 120.

[0045] The first battery module 210 may be disposed within the first accommodation space 110. The first battery module 210 may be plural. The second battery module 220 may be disposed within the second accommodation space 120. The second battery module 220 may be plural. For example, as shown in FIG. 1, four first battery modules 210 may be disposed within the first accommodation space 110, and four second battery modules 220 may be disposed within the second accommodation space 120.

[0046] FIGS. 3 and 4 are diagrams showing the battery modules included in the battery pack according to the present invention.

[0047] Referring to FIG. 3, the battery module 200 may include battery cells 201. A plurality of battery cells 201 may be provided. The battery cell 201 may mean a secondary battery. The battery cell 201 may include an electrode assembly, an electrolyte, a battery case that houses the electrode assembly and the electrolyte, and a pair of electrode leads that are connected to the electrode assembly and drawn out to the outside of the battery case. The battery cell 201 may be, for example, a pouch-type secondary battery. However, other forms of secondary batteries, such as cylindrical batteries and rectangular batteries, may also be adopted as the battery cell 201 of the present invention.

[0048] When a plurality of battery cells 201 are provided, the plurality of battery cells 201 may be electrically connected. The battery module 200 may further include a bus bar frame assembly 202 for electrically connecting the plurality of battery cells 201. The bus bar frame assembly 202 may be provided, for example, in a pair. In this case, the pair of bus bar frame assemblies 202 may be coupled to one side and the other side in the longitudinal direction (the direction parallel to the X axis) of the battery cell 201, respectively.

[0049] Referring to FIG. 4, the battery module may further include a module case 203. The module case 203 may be configured to accommodate at least one battery cell 201. The module case 203 may be provided with a vent hole 203a. The vent hole 203a may be configured such that when vent gas is generated from the battery cell 201 housed in the internal space, the generated vent gas can be discharged from the inside of the module case 203 to the outside.

[0050] FIGS. 5 to 8 are diagrams showing the movement paths of the vent gas generated in each battery module included in the battery pack according to the present invention.

[0051] Referring to FIGS. 1 and 5 to 8 together, the pack cover 300 may be provided with a plurality of first independent vent channels 310 and a plurality of second independent vent channels 320.

[0052] The plurality of first independent vent channels 310 may be configured to guide the vent gas generated in each of the plurality of first battery modules 210 to the outside of the pack housing 100. The plurality of second independent vent channels 320 may be configured to guide the vent gas generated in each of the plurality of second battery modules 220 to the outside of the pack housing 100. The pack cover 300 may be coupled to the pack housing 100 to form a vent channel between the upper part of the battery module 200 and the inner surface of the pack cover 300.

[0053] FIGS. 5 to 8 show the movement paths of the vent gas generated in each battery module in the structure of the battery pack 10 according to various embodiments of the present invention. The vent gas generated in each battery module may be discharged to the outside of the battery pack 10 through independent vent paths. The vent gas generated in each battery module may be discharged through a vent channel having a longer length as the vent gas is generated in a battery module farther from the position where the vent gas is discharged.

[0054] According to such a configuration of the present invention, in a normal case, a vent flow path can be formed in the pack cover 300 that is only used for the purpose of covering the pack housing 100 to add a function of controlling the flow of vent gas. Specifically, according to such a configuration of the present invention, when a thermal event occurs in each battery module, the flame and the vent gas can be discharged along the first independent vent flow path 310 and the second independent vent flow path 320 formed between the upper part of the battery module and the inner surface of the pack cover 300. As a result, the possibility of the thermal event spreading to the adjacent battery module 200 side can be significantly reduced. Also, while the vent gas moves, the temperature of the vent gas drops, and even when a flame is generated together with the vent gas, the intensity of the flame can weaken while moving along the vent flow path. Thereby, the damage that may occur when the high-temperature vent gas and the flame are ejected to the outside can be removed or reduced. In particular, the vent gases generated in each of the plurality of battery modules 200 are independent so as not to communicate directly with each other, and can be discharged with a time difference by being discharged through vent flow paths of other lengths.

[0055] Referring further to FIGS. 5 to 8, the first independent vent flow path 310 may include a first side vent flow path 311 and a first center vent flow path 312. The second independent vent flow path 320 may include a second side vent flow path 321 and a second center vent flow path 322.

[0056] The first side vent flow path 311 can guide the vent gases generated in each of the plurality of first battery modules 210 in a first direction (the positive direction of the X axis) toward the second accommodation space 120. The second side vent flow path 321 can guide the vent gases generated in each of the plurality of second battery modules 220 in a third direction (the negative direction of the X axis) toward the first accommodation space 110.

[0057] The first center vent passage 312 communicates with the first side vent passage 311 and can be configured to guide the vent gas generated by each of the plurality of first battery modules 210 in a second direction (the positive direction of the Y-axis) perpendicular to the first direction (the positive direction of the X-axis). The second center vent passage 322 communicates with the second side vent passage 321 and can be configured to guide the vent gas generated by each of the plurality of second battery modules 220 in a fourth direction (the negative direction of the Y-axis) perpendicular to the third direction (the negative direction of the X-axis).

[0058] FIGS. 9 and 10 are views showing a pack cover included in a battery pack according to the present invention. FIG. 11 is a view showing an enlarged portion B of FIG. 10.

[0059] Referring to FIGS. 9 and 10, the pack cover 300 may include a guide portion 340.

[0060] The guide portion 340 may be provided at corresponding positions between a plurality of adjacent first independent vent passages 310 and at corresponding positions between a plurality of adjacent second independent vent passages 320. The guide portion 340 may be configured to block the communication between a plurality of adjacent first independent vent passages 310 and the communication between a plurality of adjacent second independent vent passages 320.

[0061] According to such a configuration of the present invention, the vent gas generated by each of the plurality of battery modules 200 can be discharged through independent vent passages. Thereby, when a thermal event occurs in each battery module, the influence on other battery modules can be minimized.

[0062] Referring to FIGS. 9 to 11, the pack cover 300 may include a cover plate 330 and / or a flow path cover 350.

[0063] The cover plate 330 can be configured to cover the accommodation space of the pack housing 100. A guide portion 340 can be coupled to the inner surface of the cover plate 330. The first independent vent flow path 310 and the second independent vent flow path 320 can be spaces surrounded by the cover plate 330 and the guide portion 340. The first independent vent flow path 310 and the second independent vent flow path 320 can each have the form of a groove G formed on the inner surface of the cover plate 330. The groove G form can be the first independent vent flow path 310 and the second independent vent flow path 320. There can be a plurality of grooves G for forming the first independent vent flow path 310. There can be a plurality of grooves G for forming the second independent vent flow path 320.

[0064] The flow path cover 350 can be provided at positions corresponding to between the first accommodation space 110 and the first center vent flow path 312 and between the second accommodation space 120 and the second center vent flow path 322, respectively. The flow path cover 350 can be configured such that the guide portion 340 can be attached thereto. The flow path cover 350 can be coupled to the lower end of the guide portion 340. The first center vent flow path 312 and the second center vent flow path 322 can be spaces formed by being surrounded by the cover plate 330, the guide portion 340, and the flow path cover 350.

[0065] At least a part of the cover plate 330, the guide portion 340, and the flow path cover 350 may be configured in an integrated form with each other, and the present invention is not necessarily limited to the case where each member is manufactured separately and then coupled.

[0066] According to such a configuration of the present invention, the vent gas generated by each of the plurality of battery modules 200 can flow into the first independent vent flow path 310 and the second independent vent flow path 320 from the remaining regions excluding the regions corresponding to the flow path cover 350. Further, by applying the flow path cover 350, it is possible to prevent the vent gas from moving downward and affecting other adjacent battery modules during the process in which the vent gas generated by each of the plurality of battery modules 200 is discharged through the first center vent flow path 312 and the second center vent flow path 322.

[0067] FIG. 12 is a view showing a partition wall included in the battery pack according to the present invention.

[0068] Referring to FIG. 12, the battery pack 10 may include a first partition wall 400a and / or a second partition wall 400b.

[0069] The first partition wall 400a may be respectively disposed at positions corresponding between the first battery modules 210 adjacent to each other and at positions corresponding between the second battery modules 220 adjacent to each other.

[0070] The second partition wall 400b may be configured to block the movement of vent gas between the first accommodation space 110 and the second accommodation space 120. The second partition wall 400b may be disposed at a position corresponding between the first accommodation space 110 and the second accommodation space 120. The second partition wall 400b may be coupled to the pack cover 300 and / or the pack housing 100. The coupling may be performed by welding or bolting. The second partition wall 400b may have a substantially beam-like form with an empty interior. The space formed within the second partition wall 400b may be utilized as a passage through which wiring for connecting the battery modules passes. The wiring may be protected from physical impact by the second partition wall 400b.

[0071] According to such a configuration of the present invention, the partition walls can structurally isolate the accommodation spaces of the respective first battery modules 210 adjacent to each other and the accommodation spaces of the respective second battery modules 220 adjacent to each other. As a result, the vent gas generated in each battery module does not move to the adjacent battery module side, but moves only through the first independent vent passage 310 and the second independent vent passage 320. During such movement, the temperature of the vent gas can decrease and the intensity of the flame can weaken. When the first partition wall 400a and / or the second partition wall 400b have a substantially beam shape with an empty internal space, in addition to the effect of improving the rigidity of the battery pack 10 by the application of the first partition wall 400a and / or the second partition wall 400b and blocking the movement of vent gas between adjacent accommodation spaces, an effect of reducing the weight of the battery pack 10 is achieved.

[0072] FIG. 13 is a cross-sectional view schematically showing an exemplary form of a cross-section cut along A-A' of FIG. 2.

[0073] Referring to FIG. 13, the battery pack 10 may include a sealing member 500. The sealing member 500 may be provided at least at one of between the first partition wall 400a and the pack cover 300 and between the first partition wall 400a and the pack housing 100. The sealing member 500 may be provided at least at one of between the second partition wall 400b and the pack cover 300 and between the second partition wall 400b and the pack housing 100. The sealing member 500 may be configured to at least partially surround the joint portions of the pack cover 300 and / or the pack housing 100 and the partition walls 400a, 400b.

[0074] According to such a configuration of the present invention, the effect of preventing the vent gas from moving into the gaps between the pack cover 300 and / or the pack housing 100 and the partition walls 400a, 400b can be further improved.

[0075] FIG. 14 is a view showing a collection space and a vent device included in a battery pack according to the present invention.

[0076] Referring to FIG. 14, the battery pack 10 may include a gas collection space 600 and / or a vent device 700.

[0077] The gas collection space 600 may be provided at at least one location on one side and the other side of the pack housing 100. The vent gas generated in each battery module moves through the first independent vent flow path 310 and the second independent vent flow path 320 and gathers in the gas collection space 600. For example, the gas collection space 600 may be provided at the end of the pack housing 100 in the longitudinal direction (the positive direction of the Y-axis). However, the present invention is not limited to the form, position, and number of the gas collection spaces 600 shown in FIG. 14.

[0078] The vent device 700 may be configured to discharge the vent gas in the gas collection space 600 to the outside of the pack housing 100. The vent device 700 may penetrate the pack housing 100 and may be in the form of a simple hole. Also, not only in a completely open form, but also in a form that is not completely open, closed in a steady state, and can be opened by changes in pressure, temperature, etc., and may be a specific device. The vent device 700 may be, for example, a one-way valve.

[0079] According to such a configuration of the present invention, when a large amount of gas is generated at once and the internal pressure of the battery pack 10 increases, the internal pressure of the battery pack 10 can be quickly reduced by the gas collection space 600. The vent device 700 can discharge the gas in the intended direction, and even if the capacity that the vent device 700 can handle is increased or the number is increased and a large amount of vent gas is generated instantaneously, the gas can be discharged more quickly and smoothly.

[0080] FIG. 15 is a diagram showing an automobile according to the present invention.

[0081] Referring to FIG. 15, the battery pack 10 is applicable to a vehicle 1 such as an electric vehicle 1 or a hybrid vehicle 1. That is, the vehicle 1 according to the present invention may include the battery pack 10 according to the present invention. Further, in addition to such a battery pack 10, the vehicle 1 according to the present invention may further include various other components included in the vehicle 1. For example, the vehicle 1 according to the present invention may further include a vehicle body, a motor, a control device such as an ECU (electronic control unit), etc. in addition to the battery pack 10 according to the present invention.

[0082] As described above, the present invention has been described mainly with reference to the preferred embodiments with reference to the accompanying drawings. However, it is obvious to those skilled in the art that various modifications can be made without departing from the scope of the present invention from such a description. Therefore, the scope of the present invention should be interpreted by the claims described to include such various modifications.

Explanation of Reference Numerals

[0083] 1 Vehicle 10 Battery pack 100 Pack housing 110 First accommodation space 120 Second accommodation space 200 Battery module 201 Battery cell 202 Busbar frame assembly 203 Module case 203a Vent hole 210 First battery module 220 Second battery module 300 Pack cover 310 First independent vent flow path 311 First side vent flow path 312 First center vent flow path 320 Second independent vent flow path 321 Second side vent flow path 322 Second center vent flow path 330 Cover plate 340 Guide part 350 Flow path cover 400a First partition wall 400b Second partition wall 500 Sealing member 600 Gas collection space 700 Vent device G Groove

Claims

1. A pack housing having a first accommodation space and a second accommodation space located apart from the first accommodation space, a plurality of first battery modules disposed in the first accommodation space, a plurality of second battery modules disposed in the second accommodation space, a pack cover covering the pack housing, the pack cover being configured to include a plurality of first independent vent channels for guiding vent gases generated by each of the plurality of first battery modules to the outside of the pack housing and a plurality of second independent vent channels for guiding vent gases generated by each of the plurality of second battery modules to the outside of the pack housing, The plurality of first independent vent channels have different lengths from each other, and the plurality of second independent vent channels have different lengths from each other. A battery pack.

2. A pack housing having a first accommodation space and a second accommodation space located apart from the first accommodation space, a plurality of first battery modules disposed in the first accommodation space, a plurality of second battery modules disposed in the second accommodation space, a pack cover covering the pack housing, the pack cover being configured to include a plurality of first independent vent channels for guiding vent gases generated by each of the plurality of first battery modules to the outside of the pack housing and a plurality of second independent vent channels for guiding vent gases generated by each of the plurality of second battery modules to the outside of the pack housing, The plurality of first independent vent channels are a first side vent channel for guiding vent gases generated by each of the plurality of first battery modules in a first direction towards the second accommodation space, a first center vent channel communicating with the first side vent channel and guiding vent gases generated by each of the plurality of first battery modules in a second direction perpendicular to the first direction. A battery pack, characterized by including.

3. The plurality of second independent vent channels are a second side vent channel for guiding vent gases generated by each of the plurality of second battery modules in a third direction towards the first accommodation space, A second center vent passage that communicates with the second side vent passage and guides vent gases generated by each of the plurality of second battery modules in a fourth direction perpendicular to the third direction. The battery pack according to claim 2, characterized by comprising the same.

4. The pack cover The battery pack according to claim 1, characterized by comprising guide portions respectively provided at positions corresponding to positions between the plurality of first independent vent passages adjacent to each other and at positions corresponding to positions between the plurality of second independent vent passages adjacent to each other.

5. The guide portion The battery pack according to claim 4, characterized in that it is configured to block communication between the plurality of first independent vent passages adjacent to each other and communication between the plurality of second independent vent passages adjacent to each other.

6. The pack cover Guide portions respectively provided at positions corresponding to positions between the plurality of first independent vent passages adjacent to each other and at positions corresponding to positions between the plurality of second independent vent passages adjacent to each other, A cover plate that covers the accommodation space of the pack housing, Flow path covers respectively provided at positions corresponding to positions between the first accommodation space and the first center vent passage and between the second accommodation space and the second center vent passage, and configured such that the guide portions are attached thereto. The battery pack according to claim 3, characterized by comprising the same.

7. The first independent vent passage and the second independent vent passage each have a groove form formed on the inner surface of the cover plate. The battery pack according to claim 6, characterized by the same.

8. The battery pack The battery pack according to claim 1, characterized by comprising first partition walls respectively arranged at positions corresponding to positions between the first battery modules adjacent to each other and at positions corresponding to positions between the second battery modules adjacent to each other.

9. The battery pack The battery pack according to claim 1, characterized by comprising a second partition wall arranged at a position corresponding to a position between the first accommodation space and the second accommodation space.

10. The first partition wall The battery pack according to claim 8, wherein the movement of vent gas between the accommodation spaces of each of the first battery modules adjacent to each other and the movement of vent gas between the accommodation spaces of each of the second battery modules adjacent to each other are blocked.

11. The second partition wall The battery pack according to claim 9, wherein the second partition wall is configured to block the movement of vent gas between the first accommodation space and the second accommodation space.

12. The battery pack The battery pack according to claim 8, wherein a sealing member is provided at least at one of a position between the first partition wall and the pack cover and a position between the first partition wall and the pack housing.

13. The pack housing The battery pack according to claim 1, wherein a gas collection space is formed at least at one of one side and the other side.

14. The battery pack The battery pack according to claim 13, further comprising a vent device configured to discharge vent gas in the gas collection space to the outside of the pack housing.

15. An automobile including the battery pack according to any one of claims 1 to 14.

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