Battery assembly

Abstract

A battery assembly is disclosed. The battery assembly includes a case provided with a space inside and including a cover, and a battery cell located inside the case, and the cover includes a main body provided with a first internal space and a second internal space and having an outlet located between the first internal space and the second internal space, a first material provided in the first internal space, a second material provided in the second internal space, and a trigger member configured to cover the outlet and separate the first internal space and the second internal space from each other.

Description

Technical Field

[0001] This disclosure relates to a battery assembly.

[0002] This application is based on and claims priority to Korean Patent Application No. 10-2024-0147818, filed with the Korean Intellectual Property Office on October 25, 2024, the disclosure of which is incorporated herein by reference in its entirety. Background Technology

[0003] With the significant increase in demand for portable electronic products such as smartphones, tablet PCs and smartwatches, and the growing prevalence of electric vehicles, research is actively underway on batteries installed in these vehicles, particularly rechargeable batteries that allow for repeated charging and discharging.

[0004] Currently, commercially available rechargeable batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium rechargeable batteries. Among these batteries, lithium rechargeable batteries have a smaller or no memory effect, so they receive more attention than nickel-based rechargeable batteries because their advantages are that they can be easily recharged, have a very low self-discharge rate, and a high energy density.

[0005] Lithium-ion secondary batteries mainly consist of lithium-based oxides and carbon materials used as positive and negative electrode active materials, respectively. A lithium-ion secondary battery includes: an electrode assembly comprising a positive electrode plate and a negative electrode plate coated with positive and negative electrode active materials, respectively, with a separator inserted between the positive and negative electrode plates; and a sealed package or battery casing housing the electrode assembly and the electrolyte solution.

[0006] Generally, based on the shape of the battery casing, lithium secondary batteries can be divided into can-type secondary batteries in which the electrode components are included in a metal can and pouch-type secondary batteries in which the electrode components are included in a pouch of aluminum laminate.

[0007] Recently, secondary batteries have been widely used in medium to large-sized devices such as electric vehicles and energy storage systems (ESS) for driving and storing energy, as well as small devices such as portable electronic devices. Multiple secondary batteries can be electrically connected and stored within a module housing to form a battery module. Each secondary battery included in a battery module can then be referred to as a battery cell. Furthermore, multiple battery modules can be connected to each other to form a battery pack.

[0008] However, when a battery pack comprises multiple battery modules, and each battery module comprises multiple battery cells, the battery pack may be susceptible to thermal cascading effects between battery modules or battery cells. For example, when an event such as thermal runaway occurs within a single battery module, it is crucial to prevent the propagation of thermal runaway to other battery modules or battery cells. If 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 lead to thermal cascading effects in other battery modules or battery cells, potentially causing or escalating an explosion or fire.

[0009] Specifically, when an event such as thermal runaway occurs in a single battery module, gas or flames can be randomly emitted to the outside. If the emission of gas or flames is not properly controlled, it may be emitted towards other battery modules, potentially causing a thermal cascade in those modules. In particular, module terminals may be located on the front side of the battery module, and components such as module busbars for electrical connection to other battery modules or battery packs may be present. Therefore, if a flame is emitted to the front side of a battery module, the module terminals may be damaged, and an electrical short circuit may occur within the battery pack. Furthermore, since other battery modules may be located on the front side of the battery module, if a flame is emitted to the front side of a particular battery module, the emitted flame may be directed to other battery modules, easily leading to the spread of fire between battery modules.

[0010] If heat transfer between battery modules or individual battery cells is not properly controlled, a sudden voltage drop may occur within the battery module or battery pack. This could lead to the abrupt shutdown of the device housing the battery module or battery pack, resulting in unexpected damage. For example, if a sudden voltage drop occurs in the battery pack while an electric vehicle is operating, there will be no time to move the vehicle to a safe location.

[0011] Furthermore, if heat transfer between battery modules or individual battery cells is not properly controlled, potentially leading to a sudden fire or explosion, the risk of injury or death to users is high. For example, in the event of thermal runaway in an electric vehicle, passengers may not be able to escape safely if there is not sufficient time before the fire spreads fully. Summary of the Invention

[0012] Technical issues

[0013] This disclosure is designed to solve problems in related technologies, and therefore relates to providing a battery pack having an improved structure to properly control emissions of flames or the like generated inside the battery pack, and a vehicle including the battery pack.

[0014] This disclosure also relates to a battery assembly capable of discharging a very large volume of material into the housing in the event of a thermal event.

[0015] This disclosure also relates to a battery assembly capable of preventing the propagation of a thermal event by filling the interior of the housing with a foam material in the event of a thermal event.

[0016] Technical solution

[0017] In one aspect of this disclosure, a battery assembly is provided, comprising: a housing having an internal space and including a cover; and a battery cell located inside the housing, wherein the cover includes a body having a first internal space and a second internal space and having an outlet located between the first internal space and the second internal space; a first material disposed in the first internal space; a second material disposed in the second internal space; and a trigger member configured to cover the outlet and separate the first internal space and the second internal space from each other.

[0018] In addition, the triggering component can be configured to be damaged in the event of a thermal event.

[0019] In addition, the triggering component may include a glass bulb.

[0020] In addition, the triggering component may include a molten component.

[0021] In addition, multiple trigger components can be set.

[0022] Furthermore, the first and second materials can be configured to react with each other and expand.

[0023] In addition, the outlet can be formed towards the interior of the shell.

[0024] Furthermore, the exit allows the first and second interior spaces to connect with each other.

[0025] In addition, the cover may include a partition configured to separate the first interior space and the second interior space from each other.

[0026] In addition, the housing may include a base plate disposed below the battery cell, and the cover may be a side cover mounted on the upper surface of the base plate.

[0027] Furthermore, the first internal space can be located above the second internal space, and the density of the first material can be higher than the density of the second material.

[0028] In addition, the housing may include a base plate disposed below the battery cell, and the cover may be a top cover disposed above the battery cell.

[0029] A vehicle according to one aspect of this disclosure may include the battery assembly disclosed herein.

[0030] Beneficial effects

[0031] According to at least one embodiment of this disclosure, flames or particles can be prevented from being ejected outside the housing in the event of a thermal event.

[0032] According to at least one embodiment of this disclosure, when a thermal event occurs, the propagation of the thermal event can be prevented by filling the interior of the housing with foam material. Attached Figure Description

[0033] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the foregoing disclosure, serve to provide a further understanding of the technical features of the present disclosure; therefore, the present disclosure is not to be construed as limited to the drawings.

[0034] Figure 1 This is a diagram illustrating a second battery assembly according to an embodiment of the present disclosure.

[0035] Figure 2 It is shown Figure 1 An exploded view of a portion of the second battery assembly.

[0036] Figure 3 It is shown Figure 2 A diagram of the first battery assembly.

[0037] Figure 4 It is shown Figure 3 An exploded view of a portion of the first battery assembly.

[0038] Figure 5 It is shown Figure 4 An exploded view of a portion of the first top cover.

[0039] Figure 6 It is shown Figure 4 The first top cover diagram.

[0040] Figure 7 It is along Figure 6 The sectional view taken by the cutting line C-C'.

[0041] Figure 8 It is along Figure 6 The sectional view cut by the cutting line D-D'.

[0042] Figure 9 It is along Figure 6 The sectional view taken by the cutting line E-E'.

[0043] Figure 10 This shows what happens when a thermal event occurs. Figure 9 A graph showing the changes in [the data / process].

[0044] Figure 11 It is shown Figure 4 An exploded view of a portion of the first side cover.

[0045] Figure 12 It is shown Figure 4 The diagram of the first side cover.

[0046] Figure 13 It is along Figure 12 The sectional view cut by the cutting line F-F'.

[0047] Figure 14 It is along Figure 12 The cross-sectional view taken by the cutting line G-G'.

[0048] Figure 15 This shows what happens when a thermal event occurs. Figure 14 A graph showing the changes in [the data / process].

[0049] Figure 16 It is along Figure 3 The sectional view taken by the cutting line B-B'.

[0050] Figure 17 This shows what happens when a thermal event occurs. Figure 16 A graph showing the changes in [the data / process].

[0051] Figure 18 It is shown Figure 2 An exploded view of a portion of the second top cover.

[0052] Figure 19 It is shown Figure 2 The diagram of the second top cover.

[0053] Figure 20 It is along Figure 19 The sectional view cut by the cutting line H-H'.

[0054] Figure 21 It is along Figure 19 The sectional view cut by the cutting line I-I'.

[0055] Figure 22 It is along Figure 19 The sectional view taken by the cutting line J-J'.

[0056] Figure 23 This shows what happens when a thermal event occurs. Figure 22 A graph showing the changes in [the data / process].

[0057] Figure 24 It is shown Figure 2 An exploded view of a portion of the second side cover.

[0058] Figure 25 It is shown Figure 2 The diagram shows the second side cover.

[0059] Figure 26 It is along Figure 25 The sectional view cut by the cutting line K-K'.

[0060] Figure 27 It is along Figure 25 The sectional view cut by the cutting line L-L'.

[0061] Figure 28 This shows what happens when a thermal event occurs. Figure 27 A graph showing the changes in [the data / process].

[0062] Figure 29 It is along Figure 1 The sectional view cut by the cutting line A-A'.

[0063] Figure 30 This shows what happens when a thermal event occurs. Figure 29 A graph showing the changes in [the data / process]. Detailed Implementation

[0064] Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Before the description, it should be understood that the terminology used in the specification and appended claims should not be construed as limited to its general or dictionary meaning, but should be interpreted in accordance with the inventor's principle of appropriately defining terminology for best illustration, corresponding to the meanings and concepts of the technical aspects of the present disclosure.

[0065] Therefore, the description presented herein is merely a preferred example for illustrative purposes and is not intended to limit the scope of this disclosure. It should be understood that other equivalent substitutions and modifications may be made thereto without departing from the scope of this disclosure.

[0066] Figure 1 This is a diagram illustrating a second battery assembly 1000 according to an embodiment of the present disclosure. Figure 2 It is shown Figure 1 An exploded view of a portion of the second battery assembly 1000.

[0067] Reference Figure 1 and Figure 2 The second battery assembly 1000 may include the first battery assembly 200. The first battery assembly 200 may be located inside the second housing 100. Multiple first battery assemblies 200 may be provided. For example, the first battery assemblies 200 may be arranged in six units. In this case, the first battery assembly 200 may be referred to as a battery module 200. In this case, the second battery assembly 1000 may also be referred to as a battery pack 1000.

[0068] Figure 3 It is shown Figure 2 The diagram shows the first battery assembly 200. Figure 4 It is shown Figure 3 An exploded view of a portion of the first battery assembly 200. Figure 5 It is shown Figure 4 An exploded view of a portion of the first top cover 210a. Figure 6 It is shown Figure 4 The first top cover 210a is shown in the diagram. Figure 7 It is along Figure 6 The sectional view taken by the cutting line C-C'. Figure 8 It is along Figure 6 The sectional view cut by the cutting line D-D'. Figure 9 It is along Figure 6 The sectional view taken by the cutting line E-E'.

[0069] Reference Figures 3 to 9 The first battery assembly 200 may include a first housing 201. The first housing 201 may have a cuboid shape. The first housing 201 may form the exterior of the first battery assembly 200. The first housing 201 may have an internal space.

[0070] The battery cell 220 may be located inside the first housing 201. The first battery assembly 200 may include a plurality of battery cells 220. In this case, the battery cell 220 may represent a secondary battery. In particular, 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 the battery cell 220 may have various shapes, such as cylindrical or cuboid.

[0071] The first housing 201 may include a cover. Multiple covers may be provided. The first housing 201 may include a first top cover 210a. The first top cover 210a may have a cuboid shape. The first top cover 210a may form the appearance of the first battery assembly 200.

[0072] The first top cover 210a may include a first top body 210a1. The first top body 210a1 may have an internal space. The first top body 210a1 may have a first internal space 210a11 and a second internal space 210a12. The first internal space 210a11 and the second internal space 210a12 may be arranged along the front-back direction or the X-axis direction. The first internal space 210a11 and the second internal space 210a12 may be separated from each other.

[0073] The first top body 210a1 may have a first top outlet 210a3. The first top outlet 210a3 may be located between the first internal space 210a11 and the second internal space 210a12. The first top outlet 210a3 may enable the first internal space 210a11 and the second internal space 210a12 to communicate with each other. The first top outlet 210a3 may be formed facing the interior of the first housing 201.

[0074] The first top cover 210a may include a first top trigger member 210a4. The first top trigger member 210a4 may be inserted into a first top outlet 210a3. The first top trigger member 210a4 may cover the first top outlet 210a3. The first top trigger member 210a4 may separate a first internal space 210a11 and a second internal space 210a12 from each other.

[0075] The first material 410 can be disposed in the first internal space 210a11. The first material 410 can be contained in the first internal space 210a11. The second material 420 can be disposed in the second internal space 210a12.

[0076] The second material 420 can be contained within the second internal space 210a12. In the event of a thermal event, the first material 410 and the second material 420 can be mixed. The first material 410 and the second material 420 can react chemically with each other. The first material 410 and the second material 420 can react to produce a third material 430. The third material 430 can be a material with a very large volume. The third material 430 can be a foam material. For example, the third material 430 can comprise polyurethane resin-based foam, epoxy resin-based foam, phenol resin-based foam, etc.

[0077] Depending on the type of the third material 430, the first material 410 and the second material 420 that form the third material 430 can be selected respectively.

[0078] If the third material 430 is a polyurethane resin-based foam, then the first material 410 and the second material 420 can be a polyol compound and an isocyanate compound, respectively.

[0079] The polyol compound may contain polytetramethylene ether glycol (PTMG), polycaprolactone (PCL), polyethylene glycol (PEG), polyoxytrimethylene ether glycol (PO3G), or two or more thereof, but is not limited to these.

[0080] The isocyanate compound includes, but is not limited to, toluene diisocyanate (TDI), naphthalene-1,5-diisocyanate, terephthalic diisocyanate, diaminotoluene diisocyanate, 4,4'-diphenylmethane diisocyanate, hexamethylene diisocyanate (HDI), dicyclohexylmethane diisocyanate, diphenylmethane diisocyanate (MDI), 1-isocyanato-4-[(4-isocyanatohexyl)methyl]cyclohexane (H12MDI), isophorone diisocyanate, or two or more thereof. Furthermore, when the third material 430 is a polyurethane resin-based foam, in addition to the first material 410 and the second material 420, it may further include a blowing agent, and examples of blowing agents include, but are not limited to, water, hydrofluorocarbons (HFCs), dichloromethane, n-butane, isobutane, n-pentaneisopentane, dimethyl ether, acetone, carbon dioxide, or two or more thereof.

[0081] If the third material 430 is epoxy resin-based foam, then the first material 410 and the second material 420 can be epoxy resin and curing agent, respectively.

[0082] Epoxy resins may include epoxy resins having glycidylamino groups derived from m-phenylenediamine, epoxy resins having glycidylamino groups derived from p-phenylenediamine, epoxy resins having glycidylamino groups derived from 1,3-bis(aminomethyl)cyclohexane, epoxy resins having glycidylamino groups derived from 1,4-bis(aminomethyl)cyclohexane, epoxy resins having glycidylamino groups derived from diaminodiphenylmethane, epoxy resins having glycidylamino and / or glycidyloxy groups derived from p-aminophenol, epoxy resins having glycidyloxy groups derived from bisphenol A, epoxy resins having glycidyloxy groups derived from bisphenol F, epoxy resins having glycidyloxy groups derived from phenolic varnish, epoxy resins having glycidyloxy groups derived from resorcinol, or two or more thereof, but not limited thereto.

[0083] The curing agent may contain amine-based curing agents and may include 1,3-phenylenediamine, ethylenediamine, 1,3-diaminopropane, 1,4-diaminopropane, hexamethylenediamine, 2,5-dimethylhexamethylenediamine, trimethylhexamethylenediamine, diethylenetriamine, iminodipropylamine, bis(hexamethylene)triamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, N-hydroxyethylethylenediamine, tetra(hydroxyethyl)ethylenediamine, triethylene glycol diamine, tetraethylene glycol diamine, diethylene glycol bis(propylamine), polyoxypropylene diamine, polyoxypropylene triamine, isophorone diamine, m-phenylenediamine, N-aminoethylpiperazine, bis(4-amino-3-methyldicyclohexyl)methane, bis(aminomethyl)cyclohexane, 3,9-bis(3-aminopropyl)2,4,8,1 0-Tetraoxaspiro(5,5)undecane, norbornenediamine, tetrachloro-p-xylenediamine, m-xylenediamine, p-xylenediamine, m-phenylenediamine, o-phenylenediamine, p-phenylenediamine, 2,4-diaminoanisole, 2,4-toluenediamine, 2,4-diaminodiphenylmethane, 4,4'-diaminodiphenylmethane, 4,4'-diamino-1,2-diphenylethane, 2,4-diaminodiphenylsulfone, m-aminophenol, m-aminobenzylamine, benzyldimethylamine, 2-(dimethylaminomethyl)phenol, triethanolamine, methylbenzylamine, α-(m-aminophenyl)ethylamine, α-(p-aminophenyl)ethylamine, diaminodiethyldimethyldiphenylmethane, α,α'-bis(4-aminophenyl)-p-diisopropylbenzene, or two or more thereof, but not limited to these.

[0084] If the third material 430 is a phenolic resin-based foam, then the first material 410 and the second material 420 can be phenolic compounds and aldehyde compounds, respectively.

[0085] Phenolic compounds may include phenol, cresol, xylenol, p-alkylphenol, p-phenylphenol, resorcinol, or two or more thereof, but are not limited to these.

[0086] Examples of aldehyde compounds may include, but are not limited to, formaldehyde, formalin, paraformaldehyde, furfural, acetaldehyde, or two or more thereof.

[0087] In the event of a thermal event, the third material 430 can fill the interior of the first housing 201. The third material 430 can expand to surround the battery cell 220. The third material 430 can block the propagation of exhaust gases or particles such as combustible particles. The third material 430 can prevent the propagation of a thermal event.

[0088] Reference Figures 3 to 9The first top trigger member 210a4 can be configured to be damaged in the event of a thermal event. When a thermal event occurs, exhaust gas or particles emitted from the battery cell 220 may damage the first top trigger member 210a4. If the first top trigger member 210a4 is damaged, the first internal space 210a11 and the second internal space 210a12 can communicate with each other. When the first internal space 210a11 and the second internal space 210a12 are in communication, the first material 410 and the second material 420 can react with each other. When the first internal space 210a11 and the second internal space 210a12 are in communication, a third material 430 can be generated. The third material 430 can flow into the first housing 201 along the first top outlet 210a3.

[0089] For example, the first top trigger member 210a4 may include a glass bulb. The glass bulb may be configured to rupture above a certain temperature. For example, the glass bulb may contain a liquid, and when the temperature inside the first housing 201 rises, the volume of the liquid may expand, causing the glass bulb to rupture. When the glass bulb ruptures, the first top trigger member 210a4 may separate from the first top outlet 210a3. The ruptured glass bulb may fall downwards due to gravity. When the glass bulb ruptures, the first internal space 210a11 and the second internal space 210a12 may communicate with each other.

[0090] For example, the first top trigger member 210a4 may include a molten member. The molten member may contain a metallic material that can be melted at low temperatures. For example, the molten member may be a component such as a fusible link.

[0091] When the temperature inside the housing 201 rises, the molten component can melt. If the molten component melts, the first top triggering component 210a4 can separate from the first top outlet 210a3. The molten component may fall downwards due to gravity. When the molten component melts, the first internal space 210a11 and the second internal space 210a12 can communicate with each other.

[0092] The first top cover 210a may include a first top partition 210a2. The first top partition 210a2 may be located inside the first top body 210a1. The first top partition 210a2 can separate the first internal space 210a11 and the second internal space 210a12 from each other. The first top partition 210a2 may extend along a left-right direction or a Y-axis direction. A first top outlet 210a3 may be formed in the first top partition 210a2. The first top partition 210a2 and the first top trigger member 210a4 can separate the first internal space 210a11 and the second internal space 210a12 from each other.

[0093] Multiple first top outlets 210a3 can be configured. Multiple first top triggering components 210a4 can be configured. The first top triggering components 210a4 can be arranged in a one-to-one relationship with the first top outlets 210a3.

[0094] In the event of a thermal event, multiple first top outlets 210a3 can be opened. A portion of the multiple first top outlets 210a3 can release a third material 430. A portion of the multiple first top outlets 210a3 can be used as an air intake passage.

[0095] The first housing 201 may include a lower frame 210b. The lower frame 210b may include a first base plate 210b1. The lower frame 210b may include side frames 210b2. The side frames 210b2 may be configured as a pair. The pair of side frames 210b2 and the first base plate 210b1 may be integrally formed.

[0096] The first top cover 210a can be fastened, joined, secured, or attached to a pair of side frames 210b2. For example, the first top cover 210a can be welded to the lower frame 210b. The lower frame 210b can have open front and rear surfaces.

[0097] Multiple battery cells 220 can be arranged on the first base plate 210b1. Multiple battery cells 220 can be arranged between the first base plate 210b1 and the first top cover 210a. Multiple battery cells 220 can be located between a pair of side frames 210b2.

[0098] The battery cell 220 may extend along a front-to-back direction or an X-axis direction. Multiple battery cells 220 may be stacked along a left-to-right direction or a Y-axis direction. The battery cell 220 may include a receiving portion 221 for accommodating electrode assemblies, a first sealing portion 222 projecting forward and backward from the receiving portion 221, and a second sealing portion 223 projecting upward from the receiving portion 221. Furthermore, the battery cell 220 may include electrode leads 224 projecting forward and backward from the first sealing portion 222, respectively. The electrode leads 224 may project forward and backward from each receiving portion 221.

[0099] The pad 250 can be disposed between multiple battery cells 220. The pad 250 can be arranged between at least a portion of the battery cells 220 and / or around the periphery of the stack. For example, the pad 250 can be configured to be disposed between every four battery cells 220 stacked in a left-right direction.

[0100] The pad 250 may contain an elastic material to absorb the expansion of the battery cell 220. For example, the pad 250 may contain a foam material such as polyurethane. Alternatively, the pad 250 may contain a material capable of blocking heat or flame. For example, the pad 250 may contain a heat-insulating or flame-retardant material such as silicone or mica.

[0101] 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.

[0102] Figure 10 This shows what happens when a thermal event occurs. Figure 9 A diagram showing the changes within. (Refer to...) Figure 9 and Figure 10 In the event of a thermal event, the first top trigger member 210a4 may be damaged and the first top outlet 210a3 may be opened. The first material 410 and the second material 420 may react with each other to produce a third material 430. The third material 430 may be discharged in the downward direction or along the -Z axis direction.

[0103] Figure 11 It is shown Figure 4 An exploded view of a portion of the first side cover 240. Figure 12 It is shown Figure 4 The first side cover 240 diagram. Figure 13 It is along Figure 12 The sectional view cut by the cutting line F-F'. Figure 14 It is along Figure 12 The cross-sectional view taken by the cutting line G-G'. Figure 15 This shows what happens when a thermal event occurs. Figure 14 A graph showing the changes in [the data / process].

[0104] The first housing 201 may include a first side cover 240. The first side cover 240 may have a cuboid shape. The first side cover 240 may form the appearance of the first battery assembly 200. The first side cover 240 may be provided as a pair. The first side cover 240 may be provided as a front first side cover 240 and a rear first side cover 240.

[0105] The first side cover 240 can be fastened, joined, secured, or attached to the first top cover 210a. For example, the first side cover 240 can be joined to the first top cover 210a by welding.

[0106] The first side cover 240 can be fastened, joined, secured, or attached to the lower frame 210b. For example, the first side cover 240 can be joined to the lower frame 210b by welding.

[0107] The front first side cover 240 and the rear first side cover 240 may have a symmetrical structure. The following description will be based on the front first side cover 240.

[0108] The first side cover 240 may include a first side body 241. The first side body 241 may have an internal space. The first side body 241 may have a first internal space 241a and a second internal space 241b. The first internal space 241a and the second internal space 241b may be arranged along the vertical direction or the Z-axis direction. The first internal space 241a may be located above the second internal space 241b. The first internal space 241a and the second internal space 241b may be separated from each other.

[0109] The first side body 241 may include a first side outlet 243. The first side outlet 243 may be located between the first internal space 241a and the second internal space 241b. The first side outlet 243 can communicate between the first internal space 241a and the second internal space 241b. The first side outlet 243 may be formed facing the interior of the first housing 201.

[0110] The first side cover 240 may include a first side trigger member 244. The first side trigger member 244 may be inserted into the first side outlet 243. The first side trigger member 244 may cover the first side outlet 243. The first side trigger member 244 may separate the first internal space 241a and the second internal space 241b from each other.

[0111] The first material 410 can be arranged in the first internal space 241a. The first material 410 can be contained in the first internal space 241a. The second material 420 can be arranged in the second internal space 241b. The second material 420 can be contained in the second internal space 241b.

[0112] When a thermal event occurs, the first material 410 and the second material 420 can be mixed with each other. The first material 410 and the second material 420 can react chemically with each other. The first material 410 and the second material 420 can react with each other to produce a third material 430. The third material 430 can be a material with a very large volume. The third material 430 can be a foam material.

[0113] In the event of a thermal event, the third material 430 can fill the interior of the first housing 201. The third material 430 can expand to surround the battery cell 220. The third material 430 can block the propagation of exhaust gases or particles such as combustible particles. The third material 430 can prevent the propagation of a thermal event.

[0114] The first-side trigger member 244 can be configured to be damaged in the event of a thermal event. Exhaust gas or particles emitted from the battery cell 220 during a thermal event may damage the first-side trigger member 244. If the first-side trigger member 244 is damaged, the first internal space 241a and the second internal space 241b can communicate with each other. When the first internal space 241a and the second internal space 241b are in communication, the first material 410 and the second material 420 can react with each other. When the first internal space 241a and the second internal space 241b are in communication, a third material 430 can be generated. The third material 430 can flow into the first housing 201 along the first-side outlet 243.

[0115] For example, the first-side trigger member 244 may include a glass bulb. The glass bulb may be configured to rupture above a certain temperature. For example, the glass bulb may contain liquid, and when the temperature inside the first housing 201 rises, the volume of the liquid may expand, causing the glass bulb to rupture. If the glass bulb ruptures, the first-side trigger member 244 may separate from the first-side outlet 243. The ruptured glass bulb may fall downwards due to gravity. When the glass bulb ruptures, the first internal space 241a and the second internal space 241b may communicate with each other.

[0116] For example, the first-side trigger member 244 may include a molten member. The molten member may contain a metallic material that can melt at low temperatures. For example, the molten member may be a component such as a fuse.

[0117] When the temperature inside the first housing 201 rises, the molten component can melt. If the molten component melts, the first-side triggering component 244 can separate from the first-side outlet 243. The molten component may fall downwards due to gravity. When the molten component melts, the first internal space 241a and the second internal space 241b can communicate with each other.

[0118] The first side cover 240 may include a first side partition 242. The first side partition 242 may be located inside the first side body 241. The first side partition 242 can separate the first internal space 241a and the second internal space 241b from each other. The first side partition 242 may extend along the left-right direction or the Y-axis direction. A first side outlet 243 may be formed in the first side partition 242. The first side partition 242 and the first side trigger member 244 can separate the first internal space 241a and the second internal space 241b from each other.

[0119] The density of the first material 410 can be higher than that of the second material 420. Therefore, if the first side outlet 243 is opened, the first material 410 can easily move downwards, and the reaction between the first material 410 and the second material 420 can be facilitated.

[0120] Multiple first-side outlets 243 can be configured. Multiple first-side triggering components 244 can be configured. The first-side triggering components 244 can be arranged in a one-to-one correspondence with the first-side outlets 243.

[0121] In the event of a thermal event, multiple first-side outlets 243 can be opened. A portion of the multiple first-side outlets 243 can release third material 430. A portion of the multiple first-side outlets 243 can be used as an air intake passage.

[0122] Figure 16 It is along Figure 3 The sectional view taken by the cutting line B-B'. Figure 17 This shows what happens when a thermal event occurs. Figure 16 A graph showing the changes in [the data / process].

[0123] Reference Figure 16 and Figure 17 In the event of a thermal event, the first top trigger member 210a4 of the first top cover 210a may be damaged. Additionally, the first side trigger member 244 of the first side cover 240 may be damaged.

[0124] The third material 430 can be discharged from the first top outlet 210a3 of the first top cover 210a. The third material 430 can be filled between the battery cell 220 and the first top cover 210a. The third material 430 can be discharged from the first side outlet 243 of the first side cover 240. The third material 430 can be filled between the first side cover 240 and the battery cell 220.

[0125] The third material 430 can fill the interior of the first housing 201. This can prevent the propagation of exhaust gases or particles and inhibit the propagation of thermal events.

[0126] Figure 18 It is shown Figure 2 An exploded view of a portion of the second top cover 150. Figure 19 It is shown Figure 2 The second top cover 150 diagram. Figure 20 It is along Figure 19 The sectional view cut by the cutting line H-H'. Figure 21 It is along Figure 19 The sectional view cut by the cutting line I-I'. Figure 22 It is along Figure 19 The sectional view taken by the cutting line J-J'.

[0127] Reference Figure 1 , Figure 2 and Figures 18 to 22The second battery assembly 1000 may include a second housing 100. The second housing 100 may have a cuboid shape. The second housing 100 may form the appearance of the second battery assembly 1000. The second housing 100 may have an internal space.

[0128] The battery cell 220 may be located inside the second housing 100. The second battery assembly 1000 may include a plurality of battery cells 220.

[0129] The second housing 100 may include a cover. Multiple covers may be provided. The second housing 100 may include a second top cover 150. The second top cover 150 may have a cuboid shape. The second top cover 150 may form the appearance of the second battery assembly 1000.

[0130] The second top cover 150 may include a second top body 151. The second top body 151 may have an internal space. The second top body 151 may have a first internal space 151a and a second internal space 151b. The first internal space 151a and the second internal space 151b may be arranged along a front-back direction or an X-axis direction. The first internal space 151a and the second internal space 151b may be separated from each other.

[0131] The second top body 151 may include a second top outlet 153. The second top outlet 153 may be located between the first internal space 151a and the second internal space 151b. The second top outlet 153 may enable communication between the first internal space 151a and the second internal space 151b. The second top outlet 153 may be formed toward the interior of the second housing 100.

[0132] The second top cover 150 may include a second top trigger member 154. The second top trigger member 154 may be inserted into the second top outlet 153. The second top trigger member 154 may cover the second top outlet 153. The second top trigger member 154 may separate the first internal space 151a and the second internal space 151b from each other.

[0133] The first material 410 can be arranged in the first internal space 151a. The first material 410 can be contained in the first internal space 151a. The second material 420 can be arranged in the second internal space 151b. The second material 420 can be contained in the second internal space 151b.

[0134] When a thermal event occurs, the first material 410 and the second material 420 can be mixed with each other. The first material 410 and the second material 420 can react chemically with each other. The first material 410 and the second material 420 can react to produce a third material 430. The third material 430 can be a material with a very large volume. The third material 430 can be a foam material.

[0135] In the event of a thermal event, the third material 430 can fill the interior of the second housing 100. The third material 430 can expand to surround the battery cell 220. The third material 430 can block the propagation of exhaust gases or particles such as combustible particles. The third material 430 can prevent the propagation of a thermal event.

[0136] Reference Figure 1 , Figure 2 and Figures 18 to 22 The second top trigger member 154 can be configured to be damaged in the event of a thermal event. Exhaust gas or particles emitted from the battery cell 220 during a thermal event may damage the second top trigger member 154. If the second top trigger member 154 is damaged, the first internal space 151a and the second internal space 151b can communicate with each other. When the first internal space 151a and the second internal space 151b are in communication, the first material 410 and the second material 420 can react with each other. When the first internal space 151a and the second internal space 151b are in communication, a third material 430 can be generated. The third material 430 can flow into the second housing 100 along the second top outlet 153.

[0137] For example, the second top trigger member 154 may include a glass bulb. The glass bulb may be configured to rupture above a certain temperature. For example, the glass bulb may contain liquid, and when the temperature inside the second housing 100 rises, the volume of the liquid may expand, causing the glass bulb to rupture. If the glass bulb ruptures, the second top trigger member 154 may detach from the second top outlet 153. The ruptured glass bulb may fall downwards due to gravity. When the glass bulb ruptures, the first internal space 151a and the second internal space 151b may communicate with each other.

[0138] For example, the second top trigger member 154 may include a molten member. The molten member may contain a metallic material that can melt at low temperatures. For example, the molten member may be a component such as a fuse.

[0139] When the temperature inside the second housing 100 rises, the molten component can melt. When the molten component melts, the second top triggering component 154 can separate from the second top outlet 153. The molten component may fall downwards due to gravity. When the molten component melts, the first internal space 151a and the second internal space 151b can communicate with each other.

[0140] The second top cover 150 may include a second top partition 152. The second top partition 152 may be located inside the second top body 151. The second top partition 152 may separate the first internal space 151a and the second internal space 151b from each other. The second top partition 152 may extend along a left-right direction or a Y-axis direction. A second top outlet 153 may be formed in the second top partition 152. The second top partition 152 and the second top trigger member 154 may separate the first internal space 151a and the second internal space 151b from each other.

[0141] Multiple second top outlets 153 can be provided. Multiple second top triggering members 154 can be provided. The second top triggering members 154 can be arranged in a one-to-one correspondence with the second top outlets 153.

[0142] In the event of a thermal event, multiple second top outlets 153 can be opened. A portion of the multiple second top outlets 153 can release a third material 430. A portion of the multiple second top outlets 153 can be used as an air intake passage.

[0143] The second housing 100 may include a second base plate 110. The second housing 100 may include second side covers 120. The second side covers 120 may be provided as a pair. The pair of second side covers 120 may be fastened, joined, fixed or attached to the upper surface of the second base plate 110.

[0144] The second battery assembly 1000 may include a plurality of first battery assemblies 200. The plurality of first battery assemblies 200 may be located inside the second housing 100. The plurality of first battery assemblies 200 may be fastened, coupled, fixed or attached to the upper surface of the second base plate 110.

[0145] Multiple battery cells 220 or multiple first battery assemblies 200 may be arranged between the second base plate 110 and the second top cover 150. Multiple battery cells 220 or multiple first battery assemblies 200 may be located between a pair of second side covers 120.

[0146] The second battery assembly 1000 may include a partition wall 300. The partition wall 300 may include a first partition wall 310 and a second partition wall 320. Multiple partition walls 300 may be provided. The partition walls 300 may be mounted, fastened, fixed, coupled, or attached to the upper surface of the second base plate 110. The partition walls 300 may divide the internal space of the second housing 100. The first battery assembly 200 may be located within the space divided by the partition walls 300.

[0147] Multiple first internal spaces 151a can be configured. These multiple first internal spaces 151a can be arranged in a one-to-one correspondence with the first battery assembly 200. Multiple second internal spaces 151b can be configured. These multiple second internal spaces 151b can be arranged in a one-to-one correspondence with the first battery assembly 200.

[0148] Figure 23 This shows what happens when a thermal event occurs. Figure 22 A diagram showing the changes within. (Refer to...) Figure 22 and Figure 23 In the event of a thermal event, the second top trigger member 154 can be destroyed and the second top outlet 153 can be opened. The first material 410 and the second material 420 can react with each other to produce a third material 430. The third material 430 can be discharged in the downward direction or along the -Z axis direction.

[0149] Figure 24 It is shown Figure 2 An exploded view of a portion of the second side cover 120. Figure 25 It is shown Figure 2 The second side cover 120 is shown in the diagram. Figure 26 It is along Figure 25 The sectional view cut by the cutting line K-K'. Figure 27 It is along Figure 25 The sectional view cut by the cutting line L-L'. Figure 28 This shows what happens when a thermal event occurs. Figure 27 A graph showing the changes in [the data / process].

[0150] Reference Figure 1 , Figure 2 and Figures 24 to 28 The second housing 100 may include a second side cover 120. The second side cover 120 may have a cuboid shape. The second side cover 120 may form the appearance of the second battery assembly 1000. The second side cover 120 may be provided as a pair. The second side cover 120 may be provided as a front second side cover 120 and a rear second side cover 120.

[0151] The second side cover 120 can be fastened, joined, secured, or attached to the second top cover 150. The second side cover 120 can be fastened, joined, secured, or attached to the second base plate 110.

[0152] The front second side cover 120 and the rear second side cover 120 may have a symmetrical structure. The following description will be based on the rear second side cover 120.

[0153] The second side cover 120 may include a second side body 121. The second side body 121 may have an internal space. The second side body 121 may have a first internal space 121a and a second internal space 121b. The first internal space 121a and the second internal space 121b may be arranged along the vertical direction or the Z-axis direction. The first internal space 121a may be located above the second internal space 121b. The first internal space 121a and the second internal space 121b may be separated from each other.

[0154] The second side body 121 may include a second side outlet 123. The second side outlet 123 may be located between the first internal space 121a and the second internal space 121b. The second side outlet 123 may enable communication between the first internal space 121a and the second internal space 121b. The second side outlet 123 may be formed toward the interior of the second housing 100.

[0155] The second side cover 120 may include a second side trigger member 124. The second side trigger member 124 may be inserted into the second side outlet 123. The second side trigger member 124 may cover the second side outlet 123. The second side trigger member 124 may separate the first internal space 121a and the second internal space 121b from each other.

[0156] The first material 410 can be arranged in the first internal space 121a. The first material 410 can be contained in the first internal space 121a. The second material 420 can be arranged in the second internal space 121b. The second material 420 can be contained in the second internal space 121b.

[0157] When a thermal event occurs, the first material 410 and the second material 420 can be mixed with each other. The first material 410 and the second material 420 can react chemically with each other. The first material 410 and the second material 420 can react to produce a third material 430. The third material 430 can be a material with a very large volume. The third material 430 can be a foam material.

[0158] In the event of a thermal event, the third material 430 can fill the interior of the second housing 100. The third material 430 can expand to surround the battery cell 220. The third material 430 can block the propagation of exhaust gases or particles such as combustible particles. The third material 430 can prevent the propagation of a thermal event.

[0159] The second-side trigger member 124 can be configured to be damaged in the event of a thermal event. Exhaust gas or particles emitted from the battery cell 220 during a thermal event may damage the second-side trigger member 124. If the second-side trigger member 124 is damaged, the first internal space 121a and the second internal space 121b can communicate with each other. When the first internal space 121a and the second internal space 121b are connected, the first material 410 and the second material 420 can react with each other. When the first internal space 121a and the second internal space 121b are connected, a third material 430 can be generated. The third material 430 can flow into the second housing 100 through the second-side outlet 123.

[0160] For example, the second-side trigger member 124 may include a glass bulb. The glass bulb may be configured to rupture above a certain temperature. For example, the glass bulb may contain liquid, and when the temperature inside the second housing 100 rises, the volume of the liquid may expand, causing the glass bulb to rupture. If the glass bulb ruptures, the second-side trigger member 124 may separate from the second-side outlet 123. The ruptured glass bulb may fall downwards due to gravity. When the glass bulb ruptures, the first internal space 121a and the second internal space 121b may communicate with each other.

[0161] For example, the second-side trigger member 124 may include a molten member. The molten member may contain a metallic material that can melt at low temperatures. For example, the molten member may be a component such as a fuse.

[0162] When the temperature inside the second housing 100 rises, the molten component can melt. If the molten component melts, the second-side triggering component 124 can separate from the second-side outlet 123. The molten component may fall downwards due to gravity. When the molten component melts, the first internal space 121a and the second internal space 121b can communicate with each other.

[0163] The second side cover 120 may include a second side partition 122. The second side partition 122 may be located inside the second side body 121. The second side partition 122 can separate the first internal space 121a and the second internal space 121b from each other. The second side partition 122 may extend along a left-right direction or a Y-axis direction. A second side outlet 123 may be formed in the second side partition 122. The second side partition 122 and the second side trigger member 124 can separate the first internal space 121a and the second internal space 121b from each other.

[0164] The density of the first material 410 can be higher than that of the second material 420. Therefore, when the second side outlet 123 is opened, the first material 410 can easily move downwards, and the reaction between the first material 410 and the second material 420 can be promoted.

[0165] Multiple second-side outlets 123 can be provided. Multiple second-side triggering members 124 can be provided. The second-side triggering members 124 can be arranged in a one-to-one correspondence with the second-side outlets 123.

[0166] In the event of a thermal event, multiple second-side outlets 123 can be opened. A portion of the multiple second-side outlets 123 can release a third material 430. A portion of the multiple second-side outlets 123 can be used as an air intake passage.

[0167] The second housing 100 may include sidewalls 130. The sidewalls 130 may have a cuboid shape. The sidewalls 130 may form the appearance of the second battery assembly 1000. The sidewalls 130 may be a pair. The sidewalls 130 may include a left sidewall 130 and a right sidewall 130.

[0168] Sidewall 130 may be fastened, joined, secured, or attached to the second top cover 150. Sidewall 130 may be fastened, joined, secured, or attached to the second bottom plate 110. Sidewall 130 may be fastened, joined, secured, or attached to the second side cover 120.

[0169] The second battery assembly 1000 may include a venting device 500. The venting device 500 may be mounted on a side wall 130. For example, the venting device 500 may be mounted on a right side wall 130. For example, the venting device 500 may be a valve. When the pressure inside the second housing 100 rises, the venting device 500 may open to release gas. Furthermore, the venting device 500 may prevent outside air from flowing into the second housing 100. Multiple venting devices 500 may be provided.

[0170] Figure 29 It is along Figure 1 The sectional view cut by the cutting line A-A'. Figure 30 This shows what happens when a thermal event occurs. Figure 29 A graph showing the changes in [the data / process].

[0171] Reference Figure 29 and Figure 30 In the event of a thermal event, the second top trigger member 154 of the second top cover 150 may be damaged. Additionally, the second side trigger member 124 of the second side cover 120 may be damaged.

[0172] The third material 430 can be discharged from the second top outlet 153 of the second top cover 150. The third material 430 can be filled between the first battery assembly 200 and the second top cover 150. The third material 430 can be discharged from the second side outlet 123 of the second side cover 120. The third material 430 can be filled between the second side cover 120 and the first battery assembly 200.

[0173] The third material 430 can fill the interior of the second housing 100. This can prevent the propagation of exhaust gases or particles and inhibit the propagation of thermal events.

[0174] In the event of a thermal event, the first top trigger member 210a4 of the first top cover 210a may be damaged. Additionally, the first side trigger member 244 of the first side cover 240 may be damaged.

[0175] The third material 430 can be discharged from the first top outlet 210a3 of the first top cover 210a. The third material 430 can be filled between the battery cell 220 and the first top cover 210a. The third material 430 can be discharged from the first side outlet 243 of the first side cover 240. The third material 430 can be filled between the first side cover 240 and the battery cell 220.

[0176] The third material 430 can fill the interior of the first housing 201. This can prevent the propagation of exhaust gases or particles and inhibit the propagation of thermal events.

[0177] The first battery assembly 200 according to this disclosure can be applied to vehicles such as electric vehicles or hybrid electric vehicles. That is, in addition to the first battery assembly 200, the vehicle according to this disclosure can further include various other components included in the vehicle. For example, the vehicle according to this disclosure may also include a body, a motor, control devices such as an ECU (electronic control unit), etc.

[0178] The second battery assembly 1000 according to this disclosure can be applied to vehicles such as electric vehicles or hybrid electric vehicles. That is, in addition to the second battery assembly 1000, the vehicle according to this disclosure may also include various other components included in the vehicle. For example, the vehicle according to this disclosure may also include a body, a motor, control devices such as an ECU (electronic control unit), etc.

[0179] This disclosure has been described in detail. However, it should be understood that while the detailed description and specific examples indicate preferred embodiments of this disclosure, they are given by way of illustration only, as various changes and modifications within the scope of this disclosure will become apparent to those skilled in the art based on this detailed description.

Claims

1. A battery assembly, comprising: A housing, the housing having an internal space and including a cover; and A battery cell, wherein the battery cell is located inside the casing. The cover includes: The main body is provided with a first internal space and a second internal space and has an outlet located between the first internal space and the second internal space; The first material is disposed in the first internal space; A second material, wherein the second material is disposed in the second internal space; and A triggering member configured to cover the exit and separate the first interior space and the second interior space from each other.

2. The battery assembly according to claim 1, wherein, The triggering component is configured to be damaged in the event of a thermal event.

3. The battery assembly according to claim 1, wherein, The triggering component includes a glass bulb.

4. The battery assembly according to claim 1, wherein, The triggering component includes a melting component.

5. The battery assembly according to claim 1, wherein, The triggering components are configured in multiple ways.

6. The battery assembly according to claim 1, wherein, The first material and the second material are configured to react with each other and expand.

7. The battery assembly according to claim 1, wherein, The outlet is formed facing the interior of the housing.

8. The battery assembly according to claim 1, wherein, The exit connects the first interior space and the second interior space to each other.

9. The battery assembly according to claim 1, wherein, The cover also includes a separator configured to separate the first interior space and the second interior space from each other.

10. The battery assembly according to claim 1, wherein, The housing includes a base plate disposed below the battery cell, and The cover is a side cover installed on the upper surface of the base plate.

11. The battery assembly of claim 10, wherein, The first interior space is located above the second interior space, and The density of the first material is higher than that of the second material.

12. The battery assembly according to claim 1, wherein, The housing includes a base plate disposed below the battery cell, and The cover is a top cover arranged above the battery cell.

13. A vehicle comprising the battery assembly of any one of claims 1 to 12.

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