Battery packs and automobiles containing them

Abstract

To provide a battery pack configured such that when a gas is generated inside a battery module, a high temperature gas is discharged to the outside of the battery pack without affecting other adjacent battery modules.SOLUTION: A battery pack according to one aspect of the present invention includes: a pack housing including a first housing space and a second housing space spaced apart from the first housing space; a plurality of first battery modules disposed in the first housing space; a plurality of second battery modules disposed in the second housing space; and a pack cover configured to include a plurality of first independent vent flow paths configured to guide a 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 flow paths configured to guide a vent gas generated in each of the plurality of second battery modules to the outside of the pack housing.SELECTED DRAWING: Figure 5

Description

Technical Field

[0006]

[0001] The present invention relates to a battery pack and a vehicle including the same, and more particularly, to a battery pack configured such that when gas is generated inside a battery module, the hot gas is discharged to the outside of the battery pack without affecting other adjacent battery modules, and a vehicle 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 content disclosed in the specification and drawings of the application is 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 become full-scale, 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 is, a battery case, for sealing and housing the electrode assembly together with an electrolytic solution.

[0006] Generally, lithium-ion secondary batteries are classified into two types based on the shape of their casing: can-type secondary batteries, in which the electrode assembly is housed in a metal can, and pouch-type secondary batteries, in which the electrode assembly is housed in an aluminum laminate sheet pouch.

[0007] Recently, secondary batteries are widely used not only in small devices such as portable electronic devices, but also in medium and large devices such as electric vehicles and energy storage systems (ESS) for propulsion and energy storage. Multiple such secondary batteries can be electrically connected and housed together inside a module case to form a single battery module. These battery modules are then further electrically connected in a confined space to form a battery pack in order to increase energy density.

[0008] However, when multiple battery modules are densely packed into a confined space like this, they can become vulnerable to accidents such as fires and explosions. For example, if a thermal event such as a thermal runaway occurs in one of the battery modules, high-temperature gas may be released from that module. If this gas cannot be properly released to the outside of the battery pack, the thermal event that occurred in one battery module may propagate to other battery modules inside the battery pack, causing a chain reaction. In this case, the internal pressure of the battery pack will increase, potentially leading to an explosion. If a battery pack explodes, the explosion pressure can cause significant damage to surrounding equipment and users, and the extent and speed of the damage can increase even further. Therefore, there is a need to develop a battery pack with a structure that allows high-temperature gas to be safely released to the outside of the battery pack without affecting other adjacent battery modules if a malfunction occurs in one of the battery modules and gas is released. [Overview of the project] [Problems that the invention aims to solve]

[0009] This invention has been made in view of the above-mentioned problems, and aims to ensure that high-temperature vent gas ejected when a thermal event occurs in some battery modules is safely discharged to the outside of the battery pack without affecting other battery modules inside the battery pack.

[0010] Furthermore, the present invention also aims to control the flow of vent gas in a desired direction by adding a vent channel forming structure to a conventional battery pack.

[0011] However, the technical problems that this invention aims to solve are not limited to those described above, and other problems not mentioned will be clearly understood by those skilled in the art from the description of the invention below. [Means for solving the problem]

[0012] A battery pack according to one aspect of the present invention for achieving the above objectives may include: a pack housing having a first housing space and a second housing space located apart from the first housing space; a plurality of first battery modules disposed within the first housing space; a plurality of second battery modules disposed within the second housing space; and a pack cover configured to include a plurality of first independent vent passages 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 passages configured to guide vent gas generated by each of the plurality of second battery modules to the outside of the pack housing.

[0013] The plurality of first independent vent passages may include a first side vent passage that guides the vent gas generated in each of the plurality of first battery modules in a first direction toward the second containment space, and a first center vent passage that communicates with the first side vent passage and guides the vent gas generated in each of the plurality of first battery modules in a second direction perpendicular to the first direction.

[0014] The plurality of second independent vent passages may include a second side vent passage that guides the vent gas generated in each of the plurality of second battery modules in a third direction toward the first containment space, and a second center vent passage that communicates with the second side vent passage and guides the 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 the spaces between the plurality of adjacent first independent vent passages and at positions corresponding to the spaces between the plurality of adjacent second independent vent passages.

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

[0017] The pack cover may include guide portions provided at positions corresponding to the spaces between the plurality of adjacent first independent vent passages and at positions corresponding to the spaces between the plurality of adjacent second independent vent passages; a cover plate configured to cover the accommodation space of the pack housing; and flow path covers provided at positions corresponding to the space between the first accommodation space and the first center vent passage and the space between the second accommodation space and the second center vent passage, and configured to accommodate the guide portions.

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

[0019] The battery pack may include first partitions positioned between adjacent first battery modules and between adjacent second battery modules.

[0020] The battery pack may include a second partition wall positioned between the first and second storage spaces.

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

[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 least at one of the 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 to add a function of controlling the flow of vent gas.

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

[0030] According to yet another aspect of the present invention, the application of a flow path cover prevents vent gas generated in each of the multiple battery modules from moving downwards and affecting other adjacent battery modules during the process of discharge through the first and second center vent flow paths.

[0031] According to another aspect of the present invention, by structurally isolating the respective housing spaces of adjacent first battery modules and the respective housing spaces of adjacent second battery modules with a partition wall, it is possible to prevent vent gas generated in some battery modules from moving to adjacent battery modules.

[0032] In another aspect of the present invention, the first and / or second partitions have a substantially beam-like shape with an open internal space, thereby improving the rigidity of the battery pack and blocking the movement of vent gas between adjacent containment spaces, as well as reducing the weight of the battery pack.

[0033] According to a further aspect 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 pack housing is further improved.

[0034] According to 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 gas collection space can quickly reduce the internal pressure of the battery pack. The vent device can discharge the gas in the intended direction, and by increasing the capacity that the vent device can handle or by increasing the number of devices, even if a large amount of vent gas is generated instantaneously, the gas can be discharged more quickly and smoothly.

[0035] However, the technical problems that the present invention aims to solve are not limited to the effects described above, 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 accompanying this specification illustrate preferred embodiments of the invention and, together with the detailed description of the invention, serve to further illustrate the technical idea of ​​the invention. Therefore, the invention should not be construed as being limited solely to what is shown in the drawings. [Brief explanation of the drawing]

[0037] [Figure 1] This is an exploded perspective view showing a battery pack according to the present invention. [Figure 2] This is a perspective view showing the appearance of the battery pack according to the present invention. [Figure 3] This figure shows a battery module included in a battery pack according to the present invention. [Figure 4] This figure shows a battery module included in a battery pack according to the present invention. [Figure 5] This figure shows the movement path of vent gas generated in each battery module included in the battery pack according to the present invention. [Figure 6] This figure shows the movement path of vent gas generated in each battery module included in the battery pack according to the present invention. [Figure 7] This figure shows the movement path of vent gas generated in each battery module included in the battery pack according to the present invention. [Figure 8] This figure shows the movement path of vent gas generated in each battery module included in the battery pack according to the present invention. [Figure 9] This figure shows a pack cover included in the battery pack according to the present invention. [Figure 10] This figure shows a pack cover included in the battery pack according to the present invention. [Figure 11]This is a magnified view of section B in Figure 10. [Figure 12] This figure shows a partition wall included in the battery pack according to the present invention. [Figure 13] This is a schematic cross-sectional view showing an exemplary shape of a cross-section cut along line A-A' in Figure 2. [Figure 14] This figure shows the collection space and venting device included in the battery pack according to the present invention. [Figure 15] This is a diagram showing an automobile according to the present invention. [Modes for carrying out the invention]

[0038] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The drawings accompanying this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention later, serve to further illustrate the technical idea of ​​the present invention. Therefore, the present invention should not be construed as being limited only to what is shown in such drawings. The same reference numerals indicate the same components. In addition, in the drawings, the thickness, proportions and dimensions of components may be exaggerated for the sake of an effective explanation of the technical content.

[0039] Terms and words used in this specification and in the claims should not be interpreted in a manner limited to their ordinary or dictionary meanings, but rather in a manner and concept appropriate to the technical idea of ​​the present invention, in accordance with the principle that the inventor himself can appropriately define the concept of a term in order to best describe the invention.

[0040] In this specification, terms indicating direction such as up, down, left, right, front, and back are used. However, such terms indicate relative positions and are used only for the convenience of explanation. It is obvious to those skilled in the art that these positions can change depending on the position of the object in question, the observer's position, etc.

[0041] Therefore, it should be understood that the embodiments and configurations shown in the drawings described herein represent only one of the most preferred embodiments of the present invention and do not represent the entirety of the technical concept of the present invention, and that there are various equivalents and modifications that can be substituted for them at the time of this application.

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

[0043] Referring to Figures 1 and 2, the 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 storage space 110 and a second storage space 120 located separately from the first storage space 110. However, the storage spaces provided by the pack housing 100 are not limited to only the first storage space 110 and the second storage space 120.

[0045] The first battery module 210 may be placed in the first housing space 110. There may be multiple first battery modules 210. The second battery module 220 may be placed in the second housing space 120. There may be multiple second battery modules 220. For example, as shown in Figure 1, four first battery modules 210 may be placed in the first housing space 110, and four second battery modules 220 may be placed in the second housing space 120.

[0046] Figures 3 and 4 show battery modules included in the battery pack according to the present invention.

[0047] Referring to Figure 3, the battery module 200 may include a battery cell 201. Multiple battery cells 201 may be provided. A battery cell 201 may represent a rechargeable battery. A battery cell 201 may include an electrode assembly, an electrolyte, a battery case housing the electrode assembly and the electrolyte, and a pair of electrode leads connected to the electrode assembly and extended out of the battery case. The battery cell 201 may be, for example, a pouch-type rechargeable battery. However, other forms of rechargeable batteries, such as cylindrical batteries or prismatic batteries, may also be used as the battery cell 201 of the present invention.

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

[0049] Referring to Figure 4, the battery module may further include a module case 203. The module case 203 may be configured to house at least one battery cell 201. The module case 203 may have a vent hole 203a. The vent hole 203a may be configured to allow vent gas generated from the battery cell 201 housed in the internal space to be discharged from the inside to the outside of the module case 203.

[0050] Figures 5 to 8 show the movement paths of vent gas generated in each battery module included in the battery pack according to the present invention.

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

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

[0053] Figures 5 to 8 show the movement paths of vent gas generated in each battery module in the structure of a battery pack 10 according to various embodiments of the present invention. The vent gas generated in each battery module can be discharged to the outside of the battery pack 10 through mutually independent vent paths. The vent gas generated in each battery module can be discharged through longer vent channels the further away the vent gas is generated in from the location where the vent gas is discharged.

[0054] With this configuration of the present invention, a vent channel can be formed in the pack cover 300, which is normally used only to cover the pack housing 100, to provide a function to control the flow of vent gas. Specifically, with this configuration of the present invention, when a thermal event occurs in each battery module, the flame and vent gas can be discharged along the first independent vent channel 310 and the second independent vent channel 320 formed between the top of the battery module and the inner surface of the pack cover 300, thereby significantly reducing the possibility of the thermal event spreading to adjacent battery modules 200. Furthermore, as the vent gas moves, its temperature decreases, and even if a flame is generated along with the vent gas, the intensity of the flame may weaken as it moves along the vent channel. This eliminates or reduces damage that could occur if high-temperature vent gas and flame are ejected to the outside. In particular, the vent gas generated in each of the multiple battery modules 200 are independent of each other so as not to communicate directly, and can be discharged with a time difference by being discharged through vent channels of different lengths.

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

[0056] The first side vent channel 311 can guide the vent gas generated in each of the multiple first battery modules 210 in a first direction (positive direction of the X axis) toward the second containment space 120. The second side vent channel 321 can guide the vent gas generated in each of the multiple second battery modules 220 in a third direction (negative direction of the X axis) toward the first containment space 110.

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

[0058] Figures 9 and 10 show the pack cover included in the battery pack according to the present invention. Figure 11 is an enlarged view of portion B of Figure 10.

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

[0060] Guide sections 340 may be provided at positions corresponding to the spaces between adjacent first independent vent channels 310 and at positions corresponding to the spaces between adjacent second independent vent channels 320. Guide sections 340 may be configured to block communication between adjacent first independent vent channels 310 and communication between adjacent second independent vent channels 320.

[0061] With this configuration of the present invention, the vent gas generated in each of the multiple battery modules 200 can be discharged through independent vent channels. This minimizes the impact on other battery modules when a thermal event occurs in one battery module.

[0062] Referring to Figures 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 may be configured to cover the accommodation space of the pack housing 100. A guide portion 340 may be coupled to the inner surface of the cover plate 330. The first independent vent passage 310 and the second independent vent passage 320 may be spaces enclosed by the cover plate 330 and the guide portion 340. The first independent vent passage 310 and the second independent vent passage 320 may each have the form of a groove G formed on the inner surface of the cover plate 330. The groove G can be the first independent vent passage 310 and the second independent vent passage 320. There may be multiple grooves G for forming the first independent vent passage 310. There may be multiple grooves G for forming the second independent vent passage 320.

[0064] The flow path cover 350 may be provided at corresponding positions 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. The flow path cover 350 may be configured to accommodate a guide portion 340. The flow path cover 350 may 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 may 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 portion of the cover plate 330, guide portion 340, and flow path cover 350 may be configured as an integrated unit, and the present invention is not necessarily limited to cases where each component is manufactured separately and then joined together.

[0066] With this configuration of the present invention, the vent gas generated in each of the multiple battery modules 200 can flow into the first independent vent channel 310 and the second independent vent channel 320 from the area remaining after removing the area corresponding to the channel cover 350. Furthermore, the application of the channel cover 350 prevents the vent gas generated in each of the multiple battery modules 200 from moving downwards and affecting other adjacent battery modules during the process of discharge through the first center vent channel 312 and the second center vent channel 322.

[0067] Figure 12 shows a partition wall included in the battery pack according to the present invention.

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

[0069] The first bulkhead 400a may be positioned between adjacent first battery modules 210 and between adjacent second battery modules 220, respectively.

[0070] The second bulkhead 400b may be configured to block the movement of vent gas between the first containment space 110 and the second containment space 120. The second bulkhead 400b may be positioned at corresponding locations between the first containment space 110 and the second containment space 120. The second bulkhead 400b may be coupled to the pack cover 300 and / or pack housing 100. The coupling may be done by welding or bolting. The second bulkhead 400b may have a substantially beam-like form with an open interior. The space formed within the second bulkhead 400b may be utilized as a passage for wiring connecting battery modules. The wiring may be protected from physical impact by the second bulkhead 400b.

[0071] With this configuration of the present invention, the partitions can structurally isolate the respective housing spaces of adjacent first battery modules 210 and the respective housing spaces of adjacent second battery modules 220. As a result, the vent gas generated in each battery module does not move toward the adjacent battery module, but moves only through the first independent vent channel 310 and the second independent vent channel 320. During such movement, the temperature of the vent gas decreases, which can weaken the flame intensity. If the first partition 400a and / or the second partition 400b have a substantially beam-like shape with an open internal space, in addition to the effect of improving the rigidity of the battery pack 10 and blocking the movement of vent gas between adjacent housing spaces due to the application of the first partition 400a and / or the second partition 400b, the effect of reducing the weight of the battery pack 10 is achieved.

[0072] Figure 13 is a schematic cross-sectional view illustrating an exemplary configuration of a cross-section cut along line A-A' in Figure 2.

[0073] Referring to Figure 13, the battery pack 10 may include a sealing member 500. The sealing member 500 may be provided at least one of the following locations: 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 one of the following locations: 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 surround at least a portion of the joint between the pack cover 300 and / or the pack housing 100 and the partition walls 400a and 400b.

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

[0075] Figure 14 shows the collection space and venting device included in the battery pack according to the present invention.

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

[0077] The gas collection space 600 may be provided 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 channel 310 and the second independent vent channel 320 and collects 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 (positive direction of the Y axis). However, the present invention is not limited to the form, location and number of gas collection spaces 600 shown in Figure 14.

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

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

[0080] Figure 15 shows an automobile according to the present invention.

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

[0082] Although the present invention has been described above with reference to the accompanying drawings, it will be apparent to those skilled in the art that various modifications are possible without departing from the scope of the invention. Therefore, the scope of the invention should be interpreted as being encompassed by the claims described to include such various modifications. [Explanation of symbols]

[0083] 1. Automobile 10 Battery Packs 100 Pack Housing 110 First Containment Space 120 Second Containment Space 200 Battery Modules 201 battery cells 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 channel 311 First side vent channel 312 First center vent channel 320 Second independent vent channel 321 Second side vent channel 322 Second Center Vent Flow Channel 330 Cover Plate 340 Guide section 350 Flow channel cover 400a 1st bulkhead 400b 2nd bulkhead 500 Sealing material 600 Gas collection space 700 Vent Devices G groove

Claims

1. A pack housing having a storage space, Multiple battery modules arranged within the aforementioned housing space, A pack cover covering the pack housing, comprising a pack cover configured to include a plurality of independent vent channels for guiding vent gas generated by each of the plurality of battery modules to the outside of the pack housing, The aforementioned plurality of independent vent channels have different lengths from one another in this battery pack.

2. The aforementioned multiple independent vent channels are A side vent channel guides the vent gas generated in each of the aforementioned battery modules in a first direction, The battery pack according to claim 1, further comprising a center vent channel that communicates with the side vent channels and guides the vent gas generated in each of the plurality of battery modules in a second direction perpendicular to the first direction.

3. The aforementioned pack cover is The battery pack according to claim 1, further characterized by comprising guide portions provided at positions corresponding to the intervals between the plurality of independent vent channels adjacent to each other.

4. The aforementioned guide section is The battery pack according to claim 3, characterized in that it is configured to block communication between the plurality of independent vent channels that are adjacent to each other.

5. The aforementioned pack cover is A guide section is provided at a position corresponding to the interval between the plurality of independent vent channels that are adjacent to each other, A cover plate that covers the storage space of the pack housing, The battery pack according to claim 2, further comprising: a flow path cover provided at a position corresponding to the space between the housing and the center vent flow path, and configured to which the guide portion is attached.

6. The battery pack according to claim 5, characterized in that the independent vent channel has a groove shape formed on the inner surface of the cover plate.

7. The aforementioned battery pack is The battery pack according to claim 1, further comprising a partition wall positioned at a corresponding location between adjacent battery modules.

8. The aforementioned partition wall is The battery pack according to claim 7, characterized in that it is configured to block the movement of vent gas between the respective housing spaces of adjacent battery modules.

9. The aforementioned battery pack is The battery pack according to claim 7, characterized in that a sealing member is provided at least one of the following locations: between the partition wall and the pack cover, and between the partition wall and the pack housing.

10. The aforementioned pack housing is The battery pack according to claim 1, characterized by comprising a gas collection space formed at least one location on one side and the other side.

11. The aforementioned battery pack is The battery pack according to claim 10, further comprising a vent device configured to discharge the vent gas from the gas collection space to the outside of the pack housing.

12. An automobile comprising a battery pack according to any one of claims 1 to 11.

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