Battery cell

Abstract

A battery cell is disclosed. According to one embodiment of the invention, the battery cell includes: a housing providing space therein and having a top cover; and a battery cell located within the housing, wherein the top cover includes: a top plate covering the battery cell and having a vent; and a vent guide disposed on an upper surface of the top plate and covering at least a portion of the vent.

Description

Technical Field

[0001] This disclosure relates to a battery cell.

[0002] This application is based on and claims priority to Korean Patent Application No. 10-2024-0113446 filed with the Korean Intellectual Property Office on August 23, 2024, and Korean Patent Application No. 10-2025-0115081 filed with the Korean Intellectual Property Office on August 19, 2025, the disclosures of which are incorporated herein by reference in their entirety. Background Technology

[0003] With the significant increase in demand for portable electronic devices such as smartphones, tablet PCs, and smartwatches, and the growing popularity of electric vehicles, research on batteries installed in such devices, such as rechargeable and dischargeable secondary batteries, has been actively underway.

[0004] Currently, commercially available batteries include, for example, nickel-cadmium (NiCd) batteries, nickel-metal hydride (NiMH) batteries, nickel-zinc (NiZn) batteries, and lithium-ion (Li-ion) batteries. Among these, lithium-ion batteries have gained considerable attention compared to nickel-based batteries due to their advantages, including significantly lower memory effect allowing for a high degree of freedom in charging and discharging, very low self-discharge rate, and high energy density.

[0005] Such lithium secondary batteries typically use lithium-based oxides and carbon materials as the positive and negative electrode active materials, respectively. A lithium secondary battery includes: an electrode assembly in which positive and negative electrode plates, each coated with their respective active materials, are arranged with a separator interposed therebetween; and an outer casing (e.g., a battery housing) for hermetically sealing and housing the electrode assembly and the electrolyte together.

[0006] Generally, lithium secondary batteries can be classified into cylindrical secondary batteries and pouch-type secondary batteries according to the shape of their outer casing. In cylindrical secondary batteries, the electrode assembly is housed in a metal can; in pouch-type secondary batteries, the electrode assembly is housed in a pouch made of aluminum laminate.

[0007] Recently, secondary batteries have been 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 driving or energy storage. These secondary batteries can be housed together in an electrically connected state inside a module housing to form a single battery module. In this case, each secondary battery included in the battery module can be referred to as a battery cell. Multiple such battery modules can be connected together to form a battery pack.

[0008] However, when a battery pack comprises multiple battery modules, and each battery module contains multiple battery cells, the system may be susceptible to thermal chain reactions between battery modules or battery cells. For example, when an event such as thermal runaway occurs within a battery module, it is necessary to suppress the propagation of that thermal runaway to other battery modules or battery cells. When the propagation of thermal runaway between battery modules or battery cells is not properly suppressed, an event occurring in a particular battery module or battery cell may trigger a chain thermal reaction in other modules or battery cells, potentially leading to explosions, fires, or a significant increase in the severity of such events.

[0009] For example, when an event such as thermal runaway occurs in one of the battery modules, gases or flames may be randomly vented to the outside. If the venting of gases or flames is not properly controlled, they may be released toward other battery modules, potentially triggering a thermal chain reaction in those modules. Particularly on the front side of a battery module, there may be module terminals (such as via module busbars or similar structures) for electrical connections to other battery modules or battery packs. Therefore, when flames are vented toward the front of such a battery module, the vented flames may damage the module terminals within the battery pack and cause electrical short circuits. Furthermore, since another battery module may be located in front of this one, flames vented in that direction are likely to reach adjacent battery modules, making fire propagation between modules more likely.

[0010] When heat transfer between battery modules or battery cells is not properly controlled, a rapid voltage drop may occur within the battery module or battery pack. This can then cause unexpected shutdowns in equipment containing such modules or packs, potentially leading to unforeseen damage. For example, if a sudden voltage drop occurs in the battery pack while an electric vehicle is in operation, there may not be enough time to move the vehicle to a safe location.

[0011] Furthermore, the potential for injury to users is high when heat transfer between battery modules or battery cells is not properly controlled and a sudden fire or explosion occurs. For example, in the event of thermal runaway in an electric vehicle, passengers may not be able to evacuate safely if sufficient time is not guaranteed before the situation develops into a full-blown fire. Summary of the Invention

[0012] Technical issues

[0013] This disclosure provides a battery cell with an improved structure, as well as a battery pack and a vehicle including the battery cell, wherein the battery cell is capable of appropriately controlling the exhaust of flames generated inside the battery cell.

[0014] This disclosure provides a structure that allows exhaust gases generated inside a battery cell to be discharged smoothly.

[0015] This disclosure provides a structure that can maintain the opening and closing function of the exhaust device even in the event of a thermal event.

[0016] This disclosure provides a structure that can prevent externally emitted gases from entering the battery cell.

[0017] However, the technical problems to be solved by this disclosure are not limited to those described above, and those skilled in the art will clearly understand from the following description of this disclosure other problems not mentioned.

[0018] Technical solution

[0019] According to embodiments of this disclosure, a battery cell may include: a housing providing an internal space and including a top cover; and a battery cell located inside the housing. The top cover includes: a top plate covering the battery cell and having a vent; and a vent guide disposed on an upper surface of the top plate and covering at least a portion of the vent.

[0020] The exhaust guide may include: a peripheral wall extending along the periphery of the exhaust port; and a cover extending from the peripheral wall and configured to cover a portion of the exhaust port.

[0021] The battery cell may also include an inner cover disposed between the top cover and the battery cell.

[0022] The battery cell may also include an adhesive member disposed between the top cover and the inner cover.

[0023] The inner cover may include a protrusion that protrudes upward and inserts into the vent hole.

[0024] The inner cover may include a guide hole formed in the protrusion and facing the exhaust guide.

[0025] The exhaust guide may be configured to cover approximately 50% or less of the area of ​​the exhaust port.

[0026] It can be provided with multiple exhaust holes, and multiple exhaust guides can be provided to correspond one-to-one with the multiple exhaust holes.

[0027] Each of the plurality of exhaust guides can be arranged to guide flow in the same direction.

[0028] The total area of ​​the plurality of vents can be configured to be approximately 30% or less of the area of ​​the top plate.

[0029] The top plate and the exhaust guide are integrally formed.

[0030] On the other hand, a battery pack includes battery cells according to the present disclosure.

[0031] The battery pack may further include: a base plate on which the battery cells are mounted; and a sidewall on which the sidewall is mounted. The exhaust guide may be configured to guide flow toward the sidewall.

[0032] In another aspect of this disclosure, a vehicle includes a battery cell according to this disclosure.

[0033] According to another embodiment of this disclosure, a battery pack housing includes: a lower frame defining a space for receiving battery cells; and a top cover configured to cover the battery cells received in the space. The top cover includes a plurality of vent holes and a plurality of vent guides, each vent guide configured to cover a portion of a corresponding vent hole. Each of the plurality of vent guides includes: a peripheral wall projecting from an upper surface of the top cover and extending along the periphery of the corresponding vent hole; and a cover portion formed on the upper portion of the peripheral wall and configured to cover a portion of the corresponding vent hole.

[0034] The cover may be formed in a roof shape on the upper part of the peripheral wall and cover a portion of the corresponding vent.

[0035] The total area of ​​the plurality of vents can be configured to be approximately 30% or less of the area of ​​the top cover.

[0036] The exhaust guide may be configured to cover approximately 50% or less of the area of ​​the exhaust port.

[0037] Each of the plurality of exhaust guides can be arranged to guide flow in the same direction.

[0038] The top cover and the plurality of exhaust guides can be integrally formed.

[0039] Beneficial effects

[0040] According to at least one embodiment of this disclosure, when gas or flame is generated inside the battery cell, the discharge of such gas or flame can be appropriately controlled.

[0041] According to at least one embodiment of this disclosure, exhaust gases generated inside the battery cell can be smoothly discharged.

[0042] According to at least one embodiment of this disclosure, the electrical safety of the battery cell can be improved.

[0043] According to at least one embodiment of this disclosure, heat propagation can be suppressed.

[0044] According to at least one embodiment of this disclosure, the transmission of thermal events caused by external flames or gases to the battery cell can be suppressed. Attached Figure Description

[0045] The accompanying drawings illustrate embodiments of the present disclosure and, together with the detailed description to be described below, are used to further understand the technical concept of the present disclosure. Therefore, this disclosure should not be construed as limited to the contents shown in the drawings.

[0046] Figure 1 This is a view showing a battery cell according to an embodiment of the present disclosure.

[0047] Figure 2 It is shown Figure 1 A view of the separate configuration of a portion of the battery cell.

[0048] Figure 3 yes Figure 2 A magnified view of the top cover.

[0049] Figure 4 It is along Figure 2 The sectional view taken by line B-B'.

[0050] Figure 5 Shown from different directions Figure 2 A view of the top cover.

[0051] Figure 6 Shown from different directions Figure 2 A view of the top cover.

[0052] Figure 7 yes Figure 2 An enlarged view of the inner cover.

[0053] Figure 8 It is along Figure 1 The sectional view taken by the cutting line A-A'.

[0054] Figure 9 This shows that when a thermal event occurs, along Figure 1 A view showing the changes in the cross-sectional structure along section line AA.

[0055] Figure 10 When a thermal event occurs Figure 1 A magnified view of part C.

[0056] Figure 11 This shows what happens when a thermal event occurs. Figure 1 A view of the movement of exhaust gases and particles within the battery cell.

[0057] Figure 12 This is a view showing a battery pack according to an embodiment of the present disclosure.

[0058] Figure 13 It is shown Figure 12 A view of the separate configuration of a portion of the battery pack.

[0059] Figure 14 It is shown Figure 12 A view of the movement of exhaust gases and particles within the battery pack.

[0060] The corresponding reference numerals indicate the corresponding parts in several views throughout the accompanying drawings. The drawings presented are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the dimensions of some elements in the drawings may be exaggerated relative to other elements to aid in understanding the various embodiments. Furthermore, to facilitate a more unobstructed view of these various embodiments, common but easily understood elements that are useful or necessary in commercially viable embodiments are generally not depicted. Detailed Implementation

[0061] In the following, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The words and terms used in the detailed description and claims should not be construed as limited to their ordinary or dictionary meanings, but rather as having meanings and concepts corresponding to the technical ideas of the present disclosure that are consistent with the inventor's ability to appropriately define terms and concepts to best describe the purpose of the present disclosure.

[0062] Therefore, it is understood that the embodiments described herein and the configurations shown in the accompanying drawings are merely examples of this disclosure and do not fully represent the technical ideas of this disclosure. Various equivalents and modifications can be made in place of this disclosure when it is submitted.

[0063] Figure 1 This is a view showing a battery cell 200 according to an embodiment of the present disclosure. Figure 2 It is shown Figure 1 A view of a portion of the battery cell 200 in a separate configuration. Figure 3 It is shown Figure 2 An enlarged view of the top cover 211.

[0064] Reference Figures 1 to 3 The battery cell 200 may include a housing 210. The battery cell 200 may also be referred to as a battery module 200 including a plurality of battery cells 220. The housing 210 may have a cuboid shape. The housing 210 may include a top cover 211 and a lower frame 212. The housing 210 provides internal space for accommodating the battery module 200. The top cover 211 may have a rectangular shape. The lower frame 212 may include a base plate. The lower frame 212 may include a pair of side plates extending from the base plate. The lower frame 212 may be integrally formed.

[0065] Each battery cell 220 may be housed inside the casing 210. The battery cell 220 may refer to a secondary battery. According to one embodiment, the battery cell 220 may be a pouch-type secondary battery. However, the shape of the battery cell 220 is not limited to a pouch shape and may have various shapes such as cylindrical or prismatic. Multiple battery cells 220 may be provided.

[0066] The top cover 211 may include a top plate 211a. The top plate 211a may have a rectangular shape. The top plate 211a may be located above the battery cell 220. The top plate 211a may cover the battery cell 220. The top plate 211a may include a vent 211b. The vent 211b may extend through the top plate 211a. According to one embodiment, the vent 211b may have a hexagonal shape.

[0067] The top cover 211 may include an exhaust guide 211c. The exhaust guide 211c may be disposed on the upper surface of the top plate 211a. The exhaust guide 211c may be mounted, fastened, coupled, secured, or attached to the upper surface of the top plate 211a. The exhaust guide 211c may extend from the top plate 211a. The exhaust guide 211c may cover a portion of the exhaust port 211b.

[0068] In the event of a thermal event, exhaust gas G and particulate matter P can be discharged from battery cell 220. Particulate matter P can be substances such as electrode components or electrolyte inside battery cell 220. Particulate matter P can move together with exhaust gas G. Exhaust guide 211c can guide the discharge direction of exhaust gas G and particulate matter P. Exhaust gas G and particulate matter P can be discharged through the portion of exhaust port 211b not covered by exhaust guide 211c. Exhaust guide 211c facilitates exhaust control of battery cell 200.

[0069] Reference Figures 1 to 3 The housing 210 may include end caps 213. A pair of end caps 213 may be provided. The pair of end caps 213 may be attached to the front and rear sides of the lower frame 212, respectively. The end caps 213 may have a rectangular shape. The end caps 213 may form the appearance of the battery cell 200.

[0070] The front cover 213 may be installed, fastened, connected, secured, or attached to the top cover 211. The top cover 211 may be installed, fastened, connected, secured, or attached to the lower frame 212. The rear cover 213 may be installed, fastened, connected, secured, or attached to the top cover 211.

[0071] Multiple battery cells 220 may be provided. The multiple battery cells 220 may be stacked in a left-right direction or a Y-axis direction. Each battery cell 220 may include a receiving portion 221 with electrode assemblies. The battery cell 220 may include a first sealing portion 222 protruding from the front and rear sides of the receiving portion 221, respectively. The battery cell 220 may include a second sealing portion 223 protruding upward from the receiving portion 221. Furthermore, the battery cell 220 may include electrode leads 224 protruding from the first sealing portions 222 on the front and rear sides of the receiving portion 221, respectively. Each battery cell 220 may extend in a front-rear direction or a Y-axis direction. The electrode leads 224 may protrude from the front and rear sides of the receiving portion 221, respectively. Furthermore, depending on the design of the battery cell 220, the protrusion direction of the electrode leads 224 may be a single direction rather than both front and rear sides.

[0072] Spacers 250 may be disposed between a plurality of battery cells 220. Spacers 250 may be disposed between at least some of the battery cells 220 and / or on the outer periphery of the stack. For example, spacers 250 may be configured to be disposed between every four battery cells 220 stacked in a left-right direction.

[0073] The gasket 250 may be made of an elastic material to absorb the expansion of the battery cell 220. For example, the gasket 250 may be made of a foam material such as polyurethane. Alternatively, the gasket 250 may be made of a material capable of blocking heat or flame. For example, the gasket 250 may be made of a refractory or insulating material such as silicone or mica.

[0074] The busbar frame assembly 230 can be disposed on the front and rear sides of the plurality of battery cells 220 respectively. The busbar frame assembly 230 can be electrically connected to the electrode leads 224 of the plurality of battery cells 220.

[0075] An insulating cover 240 may be disposed between the busbar frame assembly 230 and the end cap 213. A pair of insulating covers 240 may be provided. The front insulating cover 240 may be disposed between the front end cap 213 and the front busbar frame assembly 230. The rear insulating cover 240 may be disposed between the rear end cap 213 and the rear busbar frame assembly 230. The insulating cover 240 may include an electrically insulating material. The insulating cover 240 may be disposed between the busbar frame assembly 230 and the end cap 213.

[0076] The battery cell 200 may include a heat transfer member 214. The heat transfer member 214 may be disposed between a base plate and a plurality of battery cells 220. The heat transfer member 214 may include a material with high thermal conductivity. The heat transfer member 214 may connect, fix or attach the plurality of battery cells 220 to the base plate.

[0077] Battery cell 200 may include connector 270. Connector 270 may be disposed on top cover 211. Connector 270 can electrically connect battery cell 200 to an external device. For example, the external device may be another battery cell, a battery module system (BMS), or a battery pack. FPCB 271 may be connected to connector 270. In addition, FPCB 271 may be electrically connected to multiple battery cells 220.

[0078] Figure 4 It is along Figure 3 The sectional view taken along line B-B'. (Refer to...) Figure 3 and Figure 4 The exhaust guide 211c may include a peripheral wall 211d. The peripheral wall 211d may be disposed on the upper surface of the top plate 211a. The peripheral wall 211d may protrude from the upper surface of the top plate 211a. The peripheral wall 211d may extend along the periphery of the exhaust port 211b. For example, the peripheral wall 211d may extend along approximately half of the periphery of the exhaust port 211b.

[0079] The exhaust guide 211c may include a cover 211e. The cover 211e may extend from the peripheral wall 211d. The cover 211e may be formed in a roof shape on the upper part of the peripheral wall 211d to cover a portion of the exhaust port 211b. The cover 211e may face the exhaust port 211b.

[0080] The exhaust guide 211c guides the flow of exhaust gas G and particulate P discharged through the exhaust port 211b. In this embodiment, the peripheral wall 211d and the cover 211e are designed to have a parallelogram shape, but are not limited thereto, and can be modified to various shapes (such as circles or triangles) depending on the type or shape of the exhaust gas G and particulate P in order to guide the flow of gas G and particulate P.

[0081] According to one embodiment, the peripheral wall 211d and the cover 211e may be integrally formed. The exhaust guide 211c may be integrally formed with the top plate 211a. The top cover 211 may be integrally formed.

[0082] Figure 5 Shown from different directions Figure 2 View of the top cover 211. Figure 6 Shown from another direction Figure 2 View of the top cover 211. (Refer to...) Figures 3 to 6 Multiple exhaust ports 211b can be provided. Multiple exhaust guides 211c can be provided. The exhaust ports 211b and exhaust guides 211c can be configured to correspond one-to-one with each other. The multiple exhaust ports 211b can be arranged in an array. The multiple exhaust guides 211c can be arranged in an array.

[0083] The exhaust guide 211c may be configured to cover approximately 50% or less of the area of ​​the exhaust port 211b. The cover 211e may be configured to cover approximately 50% or less of the area of ​​the exhaust port 211b. The exhaust guide 211c can guide the flow of exhaust gas G and particulate P discharged through the exhaust port 211b without obstructing the flow of exhaust gas G and particulate P.

[0084] Reference Figures 3 to 6 The total area of ​​the multiple exhaust holes 211b can be configured to be about 30% or less of the area of ​​the top plate 211a. As a result, the exhaust gas G and particles P can be easily discharged, and the exhaust gas G and particles P can have sufficient flow velocity during discharge. Because the exhaust gas G and particles P have sufficient flow velocity during discharge, the flow direction of the exhaust gas G and particles P can be stably formed.

[0085] Figure 7 It is shown Figure 2 A magnified view of the inner cover at 260°. (Refer to...) Figure 2 and Figure 7 The inner cover 260 may be disposed between the top cover 211 and the battery cell 220. The inner cover 260 may include an electrically insulating material. The inner cover 260 electrically insulates the battery cell 220 from the top cover 211. The inner cover 260 may have a rectangular shape. The inner cover 260 may be mounted, fastened, coupled, fixed, or attached to the lower surface of the top cover 211.

[0086] An adhesive member 263 may be disposed between the top cover 211 and the inner cover 260. For example, the adhesive member 263 may be double-sided tape. The adhesive member 263 may connect, secure, or attach the inner cover 260 to the lower surface of the top cover 211.

[0087] Figure 8 It is along Figure 1 The sectional view taken along section line A-A'. (Refer to...) Figure 2 , Figure 7 and Figure 8 The inner cover 260 may include a sheet 261. The sheet 261 may be mounted, fastened, coupled, secured, or attached to the lower surface of the top cover 211. The sheet 261 may be mounted, fastened, coupled, secured, or attached to the lower surface of the top plate 211a.

[0088] The inner cover 260 may include a protrusion 262. The protrusion 262 may project upward from the sheet 261 and may be integrally formed with the sheet 261. At least a portion of the protrusion 262 may be inserted into a vent hole 211b. Multiple protrusions 262 may be provided. The multiple protrusions 262 may be configured to correspond one-to-one with multiple vent holes 211b.

[0089] By inserting the protrusion 262 into the vent 211b, alignment between the inner cover 260 and the top cover 211 can be facilitated. Furthermore, assembly between the inner cover 260 and the top cover 211 can be facilitated.

[0090] The inner cover 260 may include a guide hole 262a. The guide hole 262a may be formed in the protrusion 262. The guide hole 262a may face the exhaust guide 211c. The guide hole 262a may face the cover portion 211e. The exhaust guide 211c may cover the guide hole 262a. The cover portion 211e may cover the guide hole 262a.

[0091] In the event of a thermal event, exhaust gas G and particulate matter P can be discharged through guide hole 262a. The exhaust gas G and particulate matter P discharged through guide hole 262a can collide with exhaust guide 211c. The exhaust gas G and particulate matter P discharged through guide hole 262a can collide with cover 211e. Guide hole 262a guides the exhaust gas G and particulate matter P to collide with cover 211e. Exhaust gas G and particulate matter P can be discharged through the portion of exhaust hole 211b not covered by exhaust guide 211c.

[0092] The peripheral wall 211d prevents the exhaust gas G and particulate P from flowing back into the battery cell 200 through the guide hole 262a.

[0093] Figure 9 This shows that when a thermal event occurs, along Figure 1 A view showing the changes in the cross-sectional structure along section line AA. Figure 10 When a thermal event occurs Figure 1 A magnified view of part C. Figure 11 This shows what happens when a thermal event occurs. Figure 1 A view showing the movement of exhaust gas G and particulate matter P in battery cell 200. (Refer to...) Figures 9 to 11 Each of the plurality of exhaust guides 211c can be arranged to guide flow in the same direction. Exhaust gas G and particles P discharged from exhaust guides 211c can collide with adjacent exhaust guides 211c. After the collision, exhaust gas G and particles P can flow along the outer surface of the adjacent exhaust guide 211c. Exhaust gas G and particles P can also flow along the peripheral wall 211d of the adjacent exhaust guide 211c.

[0094] The exhaust gas G and particles P can have high flow velocities. Therefore, it is possible to prevent the exhaust gas G and particles P from flowing into the exhaust port 211b corresponding to the adjacent exhaust guide 211c. Alternatively, it is possible to prevent the exhaust gas G and particles P from flowing into the guide port 262a corresponding to the adjacent exhaust guide 211c. As a result, the propagation of thermal events can be suppressed.

[0095] Figure 12This is a view showing a battery pack 1000 according to one embodiment of the present disclosure. Figure 13 It is shown Figure 12 A view of the separate configuration of a portion of the 1000 battery pack.

[0096] Reference Figure 12 and Figure 13 According to one embodiment of the present disclosure, a battery pack 1000 may include a battery pack housing 100. The battery pack housing 100 may form the exterior of the battery pack 1000. The battery pack housing 100 may have a cuboid shape. The battery pack housing 100 may provide internal space. The battery pack housing 100 may include a base plate 110. The base plate 110 may have a rectangular shape. The base plate 110 may have a flat shape. The base plate 110 may form the exterior of the battery pack 1000. The base plate 110 may provide internal space for the battery pack 1000.

[0097] The battery pack housing 100 may include a first sidewall 120a. The first sidewall 120a may be mounted, fastened, coupled, secured, or attached to the upper surface of the base plate 110. The first sidewall 120a may form the appearance of the battery pack 1000. The first sidewall 120a may provide internal space. The first sidewall 120a may extend along the left edge of the base plate 110.

[0098] The battery pack housing 100 may include a second sidewall 120b. The second sidewall 120b may be mounted, fastened, coupled, secured, or attached to the upper surface of the base plate 110. The second sidewall 120b may form the appearance of the battery pack 1000. The second sidewall 120b may provide internal space. The second sidewall 120b may extend along the right edge of the base plate 110.

[0099] The battery pack housing 100 may include a third sidewall 120c. The third sidewall 120c may be mounted, fastened, coupled, secured, or attached to the upper surface of the base plate 110. The third sidewall 120c may form the appearance of the battery pack 1000. The third sidewall 120c may provide internal space. The third sidewall 120c may extend along the front edge of the base plate 110.

[0100] The battery pack housing 100 may include a fourth sidewall 120d. The fourth sidewall 120d may be mounted, fastened, coupled, secured, or attached to the upper surface of the base plate 110. The fourth sidewall 120d may form the appearance of the battery pack 1000. The fourth sidewall 120d may provide internal space. The fourth sidewall 120d may extend along the rear edge of the base plate 110.

[0101] The battery pack housing 100 may include a battery pack cover 150. The battery pack cover 150 may have a rectangular plate shape. The battery pack cover 150 may form the appearance of the battery pack 1000. The battery pack cover 150 may be mounted, fastened, coupled, secured, or attached to a first sidewall 120a. The battery pack cover 150 may be mounted, fastened, coupled, secured, or attached to a second sidewall 120b. The battery pack cover 150 may be mounted, fastened, coupled, secured, or attached to a third sidewall 120c. The battery pack cover 150 may be mounted, fastened, coupled, secured, or attached to a fourth sidewall 120d. The battery pack cover 150 may cover the internal space of the battery pack 1000. The battery pack cover 150 may be located above battery cells 200a and 200b.

[0102] The battery pack 1000 may include partition walls 300. Partition walls 300 may include a first partition wall 310 and a second partition wall 320. Multiple partition walls 300 may be provided. Partition walls 300 may be mounted, fastened, fixed, connected, or attached to the upper surface of the base plate 110. Partition walls 300 may divide the internal space of the battery pack 1000.

[0103] The battery pack 1000 may include a venting device 500. The venting device 500 may be mounted on the first sidewall 120a. For example, the venting device 500 may be a gas valve or a vent plug. When the pressure inside the battery pack housing 100 increases, the venting device 500 may be opened to release exhaust gas G or particulate matter P.

[0104] Figure 14 It is shown Figure 12 A view showing the movement of exhaust gas G and particulate matter P in battery pack 1000. (Refer to...) Figure 14 In one embodiment, a plurality of exhaust guides 211c of the battery cell 200a can guide the exhaust gas G and particles P to flow toward the first sidewall 120a. The exhaust gas G and particles P can flow along the first sidewall 120a in the forward direction (i.e., the +X axis direction) or toward the third sidewall 120c.

[0105] In one embodiment, a plurality of exhaust guides 211c of the battery cell 200b can guide the exhaust gas G and particles P to flow toward the second sidewall 120b. The exhaust gas G and particles P can flow along the second sidewall 120b in the forward direction (i.e., the +X axis direction) or toward the third sidewall 120c.

[0106] The exhaust gas G and particulate matter P can be discharged to the outside of the battery pack 1000 through the exhaust device 500. As the flow of the exhaust gas G and particulate matter P is guided by the exhaust guide 211c, damage to adjacent battery cells 200 by the exhaust gas G and particulate matter P can be reduced. In addition, the exhaust gas G and particulate matter P can be quickly discharged to the outside of the battery pack 1000.

[0107] According to the battery pack 1000 disclosed herein, in addition to the battery cell 200, it may also include various other components (such as BMS, busbars, relays and current sensors), which are known as components of the battery pack at the time of filing of this disclosure.

[0108] Meanwhile, components such as a BMS, busbars, relays, and current sensors may be included as components of the battery cell 200 according to this disclosure. In this case, the BMS, busbars, relays, and current sensors may be disposed inside the housing 210. In this case, the battery cell 200 may be referred to as a battery pack.

[0109] The battery cell 200 according to this disclosure can be applied to vehicles such as electric vehicles or hybrid vehicles. For example, a vehicle according to this disclosure may include the battery cell 200 or battery pack 1000 according to this disclosure. Furthermore, a vehicle according to this disclosure may include, in addition to the battery cell 200 or battery pack 1000, various other components included in the vehicle. For example, a vehicle according to this disclosure may include, in addition to the battery cell 200, a vehicle body, a motor, or control equipment such as an electronic control unit (ECU).

[0110] Although this disclosure has been described using limited embodiments and accompanying drawings, it is not limited thereto, and it should be understood that various modifications and changes can be made by those skilled in the art within the technical concept of this disclosure and within the equivalent scope of the appended claims.

Claims

1. A battery cell, the battery cell comprising: A housing, the housing providing an internal space and including a top cover; and The battery cell is located inside the housing. The top cover includes: Top plate, the top plate being configured to cover the battery cell and having vent holes; and An exhaust guide is disposed on the upper surface of the top plate and configured to cover at least a portion of the exhaust port.

2. The battery cell according to claim 1, wherein, The exhaust guide includes: A peripheral wall extending along the periphery of the vent; and A cover that extends from the peripheral wall and is configured to cover a portion of the vent hole.

3. The battery cell according to claim 1, further comprising: An inner cover is disposed between the top cover and the battery cell.

4. The battery cell according to claim 3, further comprising: An adhesive component is disposed between the top cover and the inner cover.

5. The battery cell according to claim 3, wherein, The inner cover includes a protrusion that projects upward and inserts into the vent hole.

6. The battery cell according to claim 5, wherein, The inner cover includes a guide hole formed in the protrusion and facing the exhaust guide.

7. The battery cell according to claim 1, wherein, The exhaust guide is configured to cover approximately 50% or less of the area of ​​the exhaust port.

8. The battery cell according to claim 1, wherein, It is equipped with multiple exhaust ports, and Multiple exhaust guides are provided to correspond one-to-one with the multiple exhaust holes.

9. The battery cell according to claim 8, wherein, Each of the plurality of exhaust guides is arranged to guide flow in the same direction.

10. The battery cell according to claim 8, wherein, The total area of ​​the plurality of vents is configured to be approximately 30% or less of the area of ​​the top plate.

11. The battery cell according to claim 1, wherein, The top plate and the exhaust guide are integrally formed.

12. A battery pack comprising the battery cell according to claim 1.

13. The battery pack according to claim 12, further comprising: The battery unit is mounted on the base plate. as well as Sidewalls, which are mounted on the base plate. The exhaust guide is configured to guide flow toward the sidewall.

14. A vehicle comprising a battery cell according to claim 1.

15. A battery pack housing, the battery pack housing comprising: Lower frame, the lower frame defining a space for accommodating battery cells; as well as A top cover, configured to cover the battery cell housed in the space. The top cover includes multiple vent holes and multiple vent guides, each vent guide being configured to cover a portion of the corresponding vent hole. Each of the plurality of exhaust guides includes: A peripheral wall, the peripheral wall protruding from the upper surface of the top cover and extending along the periphery of the corresponding vent; and A cover portion is formed on the upper part of the peripheral wall and is configured to cover a portion of the corresponding vent hole.

16. The battery pack housing according to claim 15, wherein, The covering portion is formed in a roof shape on the upper part of the peripheral wall and covers a portion of the corresponding vent.

17. The battery pack housing according to claim 15, wherein, The total area of ​​the plurality of vents is configured to be approximately 30% or less of the area of ​​the top cover.

18. The battery pack housing according to claim 15, wherein, Each of the plurality of exhaust guides is configured to cover approximately 50% or less of the area of ​​the corresponding exhaust port.

19. The battery pack housing according to claim 15, wherein, Each of the plurality of exhaust guides is arranged to guide flow in the same direction.

20. The battery pack housing according to claim 15, wherein, The top cover and the plurality of exhaust guides are integrally formed.

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