Heat propagation blocking assembly and battery module comprising a heat propagation blocking assembly

Abstract

A battery module of the disclosure can include a plurality of battery cells, and a heat propagation blocking assembly between at least some of the plurality of battery cells. The heat propagation blocking assembly can include a thermal insulation layer including a silica aerogel, a fire-resistant member including a first fire-resistant sheet on a first face of the thermal insulation layer and a second fire-resistant sheet on a second face of the thermal insulation layer opposite the first face, and a cushioning member including a first cushioning pad on the first fire-resistant sheet and a second cushioning pad on the second fire-resistant sheet.

Description

Technical Field

[0001] This disclosure relates to heat propagation blocking components and battery modules including heat propagation blocking components. Background Technology

[0002] Unlike primary batteries, secondary batteries can be charged and discharged, making them suitable for various applications such as digital cameras, mobile phones, laptops, hybrid vehicles, electric vehicles, and energy storage systems (ESS). Secondary batteries can be lithium-ion, nickel-cadmium, nickel-metal hydride, or nickel-metal hydride batteries.

[0003] Secondary batteries can be manufactured as flexible pouch-type cells or rigid prismatic or cylindrical can-type cells. Multiple cells can be stacked into a cell assembly.

[0004] Battery cell assemblies can be housed inside a casing to form battery modules, and multiple battery modules can be housed inside a battery pack frame to form a battery pack. Battery packs can be used in various structures such as vehicles or energy storage systems. Summary of the Invention

[0005] (a) Technical problems to be solved A battery device (e.g., a battery module) may include a cell assembly comprising multiple cells. Heat, gas, or flame generated by one cell may propagate to other cells, resulting in thermal runaway or heat propagation.

[0006] According to one aspect of this disclosure, a heat propagation blocking assembly including a heat insulation layer capable of delaying heat propagation between cells and a battery module including the heat propagation blocking assembly can be provided.

[0007] According to one aspect of this disclosure, a heat propagation blocking component including a buffer pad capable of reducing cell assembly deformation caused by cell expansion, and a battery module including the heat propagation blocking component can be provided.

[0008] According to one aspect of this disclosure, a heat propagation blocking assembly comprising a fire-resistant member capable of reducing damage to the insulation layer and a battery module including the heat propagation blocking assembly can be provided.

[0009] The battery module disclosed herein can be widely used in electric vehicles, battery charging stations, and other green technology fields such as solar power generation and wind power generation that use batteries. Furthermore, the battery module disclosed herein can be used in eco-friendly electric vehicles and hybrid vehicles that prevent climate change by suppressing air pollution and greenhouse gas emissions.

[0010] (II) Technical Solution The battery module disclosed herein may include: a plurality of battery cells; and a heat propagation blocking assembly located between at least a portion of the plurality of battery cells. The heat propagation blocking assembly may include: a heat insulation layer comprising silica aerogel; a fire-resistant member including a first fire-resistant sheet located on a first surface of the heat insulation layer and a second fire-resistant sheet located on a second surface of the heat insulation layer opposite to the first surface; and a buffer member including a first buffer pad located on the first fire-resistant sheet and a second buffer pad located on the second fire-resistant sheet.

[0011] According to one embodiment, the heat propagation blocking assembly may include a support member comprising: a receiving space for receiving the insulation layer, the fire-resistant member, and the buffer member; and a frame surrounding the receiving space.

[0012] According to one embodiment, the support member may include a protrusion extending from the frame and surrounding the edges of the insulation layer, the fire-resistant member, and the cushioning pad.

[0013] According to one embodiment, the support member may include a buffer space formed within the frame.

[0014] According to one embodiment, the support member may comprise at least one of polyvinyl chloride, natural rubber, ethylene propylene rubber, nitrile rubber, and polychloroprene.

[0015] According to one embodiment, the first thermal conductivity of the insulation layer may be lower than the second thermal conductivity of the refractory component.

[0016] According to one embodiment, the first thermal conductivity of the insulation layer may be less than 0.02 W / mK, and the second thermal conductivity of the fire-resistant component may be less than 0.3 W / mK.

[0017] According to one embodiment, the first thickness of the insulation layer may be greater than or equal to the second thickness of the first refractory sheet or the second refractory sheet.

[0018] According to one embodiment, the refractory component may contain mica.

[0019] According to one embodiment, the cushioning member may comprise at least one of polyurethane, silicone, or rubber.

[0020] According to one embodiment, the heat propagation blocking component may further include an adhesive layer comprising: a first adhesive layer located between the first buffer pad and the first refractory sheet; a second adhesive layer located between the first refractory sheet and the heat insulation layer; a third adhesive layer located between the second refractory sheet and the heat insulation layer; and a fourth adhesive layer located between the second refractory sheet and the second buffer pad.

[0021] According to one embodiment, each of the plurality of battery cells may include: an electrode assembly; and a pouch including an electrode receiving portion for receiving the electrode assembly and a sealing portion for sealing at least a portion of the periphery of the electrode receiving portion, the cushioning member facing the electrode receiving portion.

[0022] According to one embodiment, the heat propagation blocking component may surround at least a portion of each of the plurality of battery cells.

[0023] The heat propagation blocking component disclosed herein may include: a heat insulation layer comprising silica aerogel; a refractory member comprising a first refractory sheet covering a first side of the heat insulation layer and a second refractory sheet covering a second side of the heat insulation layer opposite to the first side; and a buffer member comprising a first buffer pad covering the first refractory sheet and a second buffer pad covering the second refractory sheet.

[0024] According to one embodiment, the heat propagation blocking assembly may further include a support member comprising: a receiving space for receiving the insulation layer, the fire-resistant member, and the buffer member; and a frame surrounding the receiving space. The support member may include a protrusion extending from the frame and surrounding the edges of the insulation layer, the fire-resistant member, and the buffer pad.

[0025] According to one embodiment, the first thermal conductivity of the insulation layer may be lower than the second thermal conductivity of the refractory component.

[0026] According to one embodiment, the first thermal conductivity of the insulation layer may be less than 0.02 W / mK, and the second thermal conductivity of the fire-resistant component may be less than 0.3 W / mK.

[0027] According to one embodiment, the refractory component may contain mica.

[0028] According to one embodiment, the heat propagation blocking component may further include an adhesive layer comprising: a first adhesive layer located between the first buffer pad and the first refractory sheet; a second adhesive layer located between the first refractory sheet and the heat insulation layer; a third adhesive layer located between the second refractory sheet and the heat insulation layer; and a fourth adhesive layer located between the second refractory sheet and the second buffer pad.

[0029] The battery pack disclosed herein may include: at least one battery module; and a battery pack frame for housing the at least one battery module. The at least one battery module may include: a plurality of battery cells; and a heat propagation blocking assembly located between at least a portion of the plurality of battery cells. The heat propagation blocking assembly may include: a heat insulation layer comprising silica aerogel; a fire-resistant member including a first fire-resistant sheet covering a first side of the heat insulation layer and a second fire-resistant sheet covering a second side of the heat insulation layer opposite to the first side; and a cushioning member including a first cushioning pad covering the first fire-resistant sheet and a second cushioning pad covering the second fire-resistant sheet.

[0030] (III) Beneficial Effects According to one embodiment of this disclosure, heat propagation between battery cells can be prevented or delayed.

[0031] According to one embodiment of this disclosure, the expansion force caused by cell air expansion can be absorbed, thereby preventing or reducing the deformation of the cell assembly.

[0032] According to one embodiment of this disclosure, damage to the insulation layer can be reduced. Attached Figure Description

[0033] Figure 1 This is a perspective view of a battery cell according to one embodiment.

[0034] Figure 2 This is a perspective view of a battery module according to one embodiment.

[0035] Figure 3 This is a perspective view of a battery cell assembly according to one embodiment.

[0036] Figure 4 This is a perspective view of a heat-blocking assembly according to one embodiment.

[0037] Figure 5 This is an exploded perspective view of a heat-blocking assembly according to one embodiment.

[0038] Figure 6 According to one embodiment, along Figure 4 A three-dimensional view of the cross section taken from the A-A' line.

[0039] Figure 7 According to one embodiment Figure 6 An enlarged view of region A.

[0040] Figure 8 This is a perspective view of a support member according to one embodiment.

[0041] Figure 9 This is an exploded perspective view of a heat-blocking assembly according to one embodiment.

[0042] Figure 10 This is an exploded perspective view of a battery pack according to one embodiment. Detailed Implementation

[0043] The present disclosure will now be described in detail with reference to the accompanying drawings. However, this is merely exemplary, and the present disclosure is not limited to the specific embodiments described herein.

[0044] The terms or words used in this specification and claims should not be construed as having their conventional or dictionary meanings. Rather, they should be interpreted as meanings and concepts consistent with the technical spirit of this disclosure, based on the principle that the inventors may appropriately define the concepts of the terms in order to best illustrate their invention.

[0045] Therefore, the embodiments described in this specification and the structures shown in the accompanying drawings are merely the most preferred embodiments of this disclosure and do not represent all the technical ideas of this disclosure. It should be understood that there may be many equivalents and variations that can be substituted at the time of submission of this application.

[0046] Detailed descriptions of well-known functions and structures that could obscure the spirit of this disclosure are omitted. Some components may be exaggerated, omitted, or shown exemplarily in the accompanying drawings, and the dimensions of each component do not fully reflect their actual dimensions.

[0047] Figure 1 This is a perspective view of a battery cell according to one embodiment.

[0048] Reference Figure 1 The battery cell 100 may include a pouch 110, an electrode assembly 120, and electrode tabs 130. The battery cell 100 may be a secondary battery. For example, the battery cell 100 may be a lithium-ion battery, but is not limited thereto. For example, the battery cell 100 may be a rechargeable and dischargeable nickel-cadmium battery, nickel-metal hydride battery, or nickel-metal hydride battery.

[0049] The bag 110 may form at least a portion of the appearance of the battery cell 100. The bag 110 may include an electrode receiving portion 111 for receiving the electrode assembly 120 and a sealing portion 115 for sealing at least a portion of the periphery of the electrode receiving portion 111. The electrode receiving portion 111 may provide space for receiving the electrode assembly 120 and the electrolyte.

[0050] The sealing portion 115 can be formed by engaging at least a portion of the periphery of the bag 110. The sealing portion 115 can be formed as a flange extending outward from the electrode receiving portion 111, which is formed in the form of a container, and can be disposed along at least a portion of the periphery of the electrode receiving portion 111. In one embodiment, the sealing portion 115 may include a first sealing portion 115a provided with electrode tabs 130 and a second sealing portion 115b without electrode tabs 130. A portion of the electrode tabs 130 may be extended outward or exposed to the outside of the bag 110. To improve the sealing performance of the first sealing portion 115a while ensuring electrical insulation, the electrode tabs 130 may be covered by an insulating film 140 at the point where they are extended. The insulating film 140 may be made of a thin film material thinner than the electrode tabs 130 and may be attached to both sides of the electrode tabs 130.

[0051] In one embodiment, electrode tabs 130 may be disposed on both sides of the length direction (Y-axis direction) of the battery cell 100 and facing opposite directions. For example, electrode tabs 130 may include: a positive electrode tab 130a, facing one side of the length direction of the battery cell 100 and having a first polarity (e.g., positive); and a negative electrode tab 130b, facing the other side of the length direction of the battery cell 100 and having a second polarity (e.g., negative). Figure 1 In the illustrated embodiment, the sealing portion 115 may include two first sealing portions 115a provided with electrode tabs 130 and a second sealing portion 115b without electrode tabs 130. The electrode tabs 130 may be referred to as electrode leads.

[0052] The orientation of the electrode tabs 130 can be selectively designed. In one embodiment (e.g., Figure 1 In this process, the electrode tab 130 may include a positive electrode tab 130a and a negative electrode tab 130b located in the opposite direction to the positive electrode tab 130a, with reference to the electrode assembly 120. Figure 1 The diagram shows electrode tabs 130 disposed on both sides of the length direction (e.g., the Y-axis direction) of the cell 100 and facing opposite directions, but the structure of the electrode tabs 130 is not limited thereto. For example, the two electrode tabs 130 may be arranged substantially parallel along the length direction (e.g., the Y-axis direction) of the cell 100.

[0053] On the other hand, bag 110 is not limited to such Figure 1 The structure shown is formed by folding an outer material and creating a sealing portion 115 on three sides.

[0054] In one embodiment of this disclosure, at least a portion of the sealing portion 115 may be formed in a folded configuration at least once. Due to the folding of at least a portion of the sealing portion 115, the engagement reliability of the sealing portion 115 can be improved, and the area of ​​the sealing portion 115 can be minimized. In the sealing portion 115 according to one embodiment, the second sealing portion 115b without the electrode tab 130 can be secured by an adhesive member (not shown) after being folded twice. The folding angle or the number of folds of the second sealing portion 115b can be varied. For example, in an embodiment not shown, the second sealing portion 115b may be folded 90° relative to the first sealing portion 115a.

[0055] Electrode assembly 120 may include a positive electrode plate, a negative electrode plate, and a separator. The separator prevents the positive and negative electrode plates from contacting each other. Those skilled in the art will understand that electrode assembly 120 can be manufactured in various ways. According to an exemplary embodiment, the electrode assembly can be formed by repeatedly arranging the positive electrode, negative electrode, and separator. In some embodiments, the electrode assembly may be of a winding type, a stacking type, a z-folding type, or a stack-folding type.

[0056] Figure 1 The structure of the battery cell 100 shown is exemplary. For example, in Figure 1 In this description, cell 100 is illustrated as a pouch-type cell, but the structure of cell 100 is not limited to this. For example, cell 100 can be a cylindrical cell or a prismatic cell.

[0057] Figure 2 This is a perspective view of a battery module according to one embodiment.

[0058] Reference Figure 2 The battery module 200 may include a module housing 210 and a busbar assembly 220.

[0059] The module housing 210 can form at least a portion of the appearance of the battery module 200, and can be configured to accommodate multiple battery cells (e.g., Figure 1 Cell assemblies (e.g., cell 100) Figure 3 The module housing 210 may include a cover 211 covering the battery cell assembly 101 and / or a receiving portion 212 surrounding the bottom and sides of the battery cell assembly 101. In one embodiment, the cover 211 may be referred to as the top cover.

[0060] The receiving portion 212 may include a main board covering the bottom surface of the cell assembly 101 and a plurality of sidewall members covering at least a portion of the sides of the cell assembly 101. At least a portion of the receiving space may be surrounded by the main board, the sidewall members, and the end plate 215.

[0061] The module housing 210 may include an end plate 215 covering a portion of the side of the cell assembly 101. In one embodiment, the end plate 215 may be connected to the longitudinal end (e.g., the Y-axis direction) of the receiving portion 212. The end plate 215 may cover a portion of the side of the cell assembly 101 and the busbar assembly 220. The end plate 215 may include holes for receiving connection terminals of the busbar assembly 220.

[0062] According to one embodiment, the module housing 210 can be made of a material with high thermal conductivity, such as metal. For example, the module housing 210 can be formed of aluminum. However, the material of the module housing 210 is not limited to this. According to another embodiment, the module housing 210 can be formed of a polymer. The module housing 210 can be referred to as a shell, enclosure, or module housing.

[0063] Busbar assembly 220 may include: a conductive busbar (not shown), and electrode tabs (e.g., for battery cell 100) for connection to the battery cell 100. Figure 1 The battery cell 100 has an electrode tab 130 electrically connected to the battery module 200; and a busbar frame (not shown) supporting the busbar. The busbar assembly 220 may include at least one connection terminal for external electrical connection. The electrode tab 130 of the battery cell 100 can be electrically connected to the external battery module 200 via the busbar and the connection terminal.

[0064] Figure 3 This is a perspective view of a battery cell assembly according to one embodiment. Figure 4 This is a perspective view of a heat-blocking assembly according to one embodiment. Figure 5 This is an exploded perspective view of a heat-blocking assembly according to one embodiment.

[0065] include Figure 3 , Figure 4 and / or Figure 5 The battery cell assembly 101 may include multiple battery cells 100 and multiple heat propagation blocking components 300. (Regarding...) Figure 1 The instructions for cell 100 are applicable to Figure 3 100 cells.

[0066] The cell assembly 101 may be substantially hexahedral in shape. In one embodiment, the cell assembly 101 may be referred to as a cell stack.

[0067] A heat propagation blocking component 300 may be located between at least a portion of a plurality of battery cells 100. In one embodiment, a battery cell assembly 101 may include alternately stacked battery cells 100 and a heat propagation blocking component 300. For example, a heat propagation blocking component 300 may include a first heat propagation blocking component 300a and a second heat propagation blocking component 300b spaced apart from the first heat propagation blocking component 300a. A battery cell 100 may be disposed between the first heat propagation blocking component 300a and the second heat propagation blocking component 300b. However, this is merely exemplary, and in another embodiment, the heat propagation blocking component 300 may be located between at least a portion of a plurality of battery cells 100. For example, the number of battery cells 100 included in a battery cell unit with a heat propagation blocking component 300 may be selected.

[0068] The battery cell 100 included in the battery cell assembly 101 is not limited to Figure 1 The battery cell 100. According to an exemplary embodiment, the battery cell assembly 101 may include cylindrical battery cells, prismatic battery cells, and / or pouch-shaped battery cells.

[0069] In one embodiment, the battery cell 100 may be inserted (e.g., press-fitted) between and assembled with multiple heat propagation blocking components 300. In another embodiment, the battery cell 100 and the heat propagation blocking components 300 may be bonded to each other using adhesive tape (not shown) or adhesive (not shown).

[0070] The thermal propagation blocking component 300 can prevent or delay thermal propagation and / or thermal runaway. For example, the thermal propagation blocking component 300 can delay the diffusion of heat, gas, and / or flame within the battery module 200 by blocking or delaying the propagation of heat, gas, and / or flame from cell 100 to other cells 100. The thermal propagation blocking component 300 may be referred to as a thermal separator or thermal insulation structure.

[0071] The heat propagation blocking component 300 may include a heat insulation layer 310, a fire-resistant component 320, and a buffer component 330.

[0072] The thermal insulation layer 310 can block or reduce heat transfer between adjacent cells 100. The thermal insulation layer 310 can be made of a thermally insulating material. For example, the thermal insulation layer 310 can comprise silica aerogel. The primary thermal conductivity of the thermal insulation layer 310 can be less than 0.02 W / (m·K). In one embodiment, the silica aerogel can comprise silica. The size of the silica aerogel particles can be approximately 10 to 100 μm. Each silica aerogel particle can include micropores.

[0073] The insulation layer 310 may be substantially plate-shaped. For example, the insulation layer 310 may include a first surface 310a and a second surface 310b opposite to the first surface 310b.

[0074] The insulation layer 310 may be provided as at least one layer. For example, a heat propagation blocking assembly 300 including one insulation layer 310 is shown in this disclosure, but in another embodiment, the heat propagation blocking assembly 300 may include a plurality of stacked insulation layers 310.

[0075] The fire-resistant component 320 protects the insulation layer 310, blocking or reducing heat transfer between adjacent cells 100. The fire-resistant component 320 can be made of a heat-resistant material. For example, the fire-resistant component 320 can contain a material with higher fire resistance than the insulation layer 310. In one embodiment, the mass loss of the fire-resistant component 320 at 500°C can be less than 1%. For example, the fire-resistant component 320 can contain mica. In one embodiment, the fire-resistant component 320 can be substantially made of an insulating material (e.g., mica). The first thermal conductivity of the insulation layer 310 can be lower than the second thermal conductivity of the fire-resistant component 320. For example, the fire-resistant component 320 can have a thermal conductivity of less than 0.3 W / (m·K). However, the fire-resistant component 320 can be replaced with a heat-resistant and insulating material such as silica wool other than mica. The fire-resistant component 320 can have heat resistance. In one embodiment, the stable properties of the fire-resistant component 320 can be maintained at temperatures above 800°C for a specified time.

[0076] The fire-resistant member 320 may cover at least a portion of the insulation layer 310. For example, the fire-resistant member 320 may include a first fire-resistant sheet 321 covering a first surface 310a of the insulation layer 310 and a second fire-resistant sheet 322 covering a second surface 310b of the insulation layer 310. For example, the first fire-resistant sheet 321 may be located above the first surface 310a of the insulation layer 310, and the second fire-resistant sheet 322 may be located on the second surface 310b of the insulation layer 310.

[0077] The first refractory sheet 321 and the second refractory sheet 322 may each be substantially plate-shaped. For example, the first refractory sheet 321 may include: a first refractory surface 321a facing the first buffer pad 331; and a second refractory surface 321b facing the first refractory surface 321a and the insulation layer 310. The second refractory sheet 322 may include: a third refractory surface 322a facing the insulation layer 310; and a fourth refractory surface 322b facing the third refractory surface 322a and the second buffer pad 332. The insulation layer 310 may be located between the first refractory sheet 321 and the second refractory sheet 322. The refractory member 320 covers at least a portion of the insulation layer 310, thereby preventing the structure of the insulation layer 310 from collapsing due to thermal decomposition in the event of thermal runaway. For example, the insulation layer 310 may have a gel-like morphology, which may reduce the refractory performance of the insulation layer 310. The fire-resistant component 320 can maintain the insulation effect of the insulation layer 310 by protecting the insulation layer 310 from flames and / or gases.

[0078] The insulation layer 310 and the fire-resistant component 320 can maintain the insulation effect of the heat propagation blocking assembly 300 while maintaining its lightweight and fire resistance. For example, the first thickness of the insulation layer 310 can be greater than the second thickness of the first fire-resistant sheet 321 or the second fire-resistant sheet 322. The distance between the first surface 310a and the second surface 310b of the insulation layer 310 can be referred to as the first thickness of the insulation layer 310. The distance between the first fire-resistant surface 321a and the second fire-resistant surface 321b of the first fire-resistant sheet 321, or the distance between the third fire-resistant surface 322a and the fourth fire-resistant surface 322b of the second fire-resistant sheet 322, can be referred to as the second thickness of the fire-resistant component 320 (e.g., the first fire-resistant sheet 321 or the second fire-resistant sheet 322).

[0079] The buffer member 330 can absorb at least a portion of the expansion pressure caused by the gas expansion of the battery cell 100. The buffer member 330 may comprise an elastic material. For example, the buffer member 330 may comprise at least one of polyurethane, silicone, or rubber. The electrode receiving portion 111 of the battery cell 100 can be pressurized by the elastic force of the buffer member 330. Pressurizing the electrode receiving portion 111 can reduce the gas expansion of the battery cell 100. In one embodiment, the compression set value of the buffer member 330 may be less than 10%. In one embodiment, the density of the buffer member 330 may be less than 350 kg / m³. 3 .

[0080] A buffer member 330 may be disposed on the refractory member 320. For example, the buffer member 330 may include: a first buffer pad 331 covering at least a portion of the first refractory sheet 321; and a second buffer pad 332 covering at least a portion of the second refractory sheet 322. The first buffer pad 331 may be located on the first refractory sheet 321. The second buffer pad 332 may be located on the second refractory sheet 322. In one embodiment, the heat propagation blocking assembly 300 may include a first buffer pad 331, a first refractory sheet 321, a heat insulation layer 310, a second refractory sheet 322, and a second buffer pad 332 stacked sequentially along the length direction (Y-axis direction).

[0081] The first buffer pad 331 and the second buffer pad 332 can each be substantially plate-shaped. For example, the first buffer pad 331 may include: a first buffer surface 331a facing the outside of the heat propagation blocking component 300; and a second buffer surface 331b opposite to the first buffer surface 331a and facing the first refractory surface 321a of the first refractory sheet 321. The second buffer pad 332 may include: a third buffer surface 332a facing the fourth refractory surface 322b of the second refractory sheet 322; and a fourth buffer surface 332b opposite to the third buffer surface 332a and facing the outside of the heat propagation blocking component 300. The first buffer surface 332a and the fourth buffer surface 332b may face or contact the bag 110 of the battery cell 100, respectively. Through the buffer pads 331 and 332, the electrode receiving portion 111 of the bag 110 is pressurized, thereby reducing the air expansion phenomenon of the battery cell 100. The first refractory sheet 321 may be disposed between the heat insulation layer 310 and the first buffer pad 331. The second refractory sheet 322 can be disposed between the heat insulation layer 310 and the second buffer pad 332.

[0082] The heat propagation blocking assembly 300 may include a support member 340. The support member 340 may house an insulation layer 310, a fire-resistant member 320, and a cushioning member 330. For example, the support member 340 may include: a receiving space 341 for receiving the insulation layer 310, the fire-resistant member 320, and the cushioning member 330; and frames 342, 343 surrounding at least a portion of the receiving space 341. For example, the support member 340 may include a first frame 342 (e.g., a longitudinal frame) and a second frame 343 (e.g., a transverse frame) provided in a closed curved shape. The receiving space 341 may be an empty space defined by the first frame 342 and the second frame 343. In one embodiment, the first frame 342 and the second frame 343 may be integrally formed. In another embodiment, the first frame 342 and the second frame 343 may be connected to each other using an adhesive (not shown). In one embodiment, the support member 340 may be referred to as a gasket.

[0083] The support member 340 may be made of an elastic, non-conductive material. For example, the support member 340 may include at least one of polyvinyl chloride, natural rubber, ethylene propylene rubber, nitrile rubber, and polychloroprene.

[0084] The structure of the support member 340 is further described below.

[0085] Figure 6 According to one embodiment, along Figure 4 A three-dimensional view of the cross section taken from the A-A' line. Figure 7 According to one embodiment Figure 6 An enlarged view of region A. Figure 8 This is a perspective view of a support member according to one embodiment.

[0086] Reference Figure 6 , Figure 7 and / or Figure 8 The heat propagation blocking component 300 may include a heat insulation layer 310, a fire-resistant component 320, a buffer component 330, and a support component 340. (About...) Figure 3 , Figure 4 and / or Figure 5 The descriptions of the heat propagation blocking component 300, the insulation layer 310, the fire-resistant component 320, the buffer component 330, and the support component 340 are applicable to Figure 6 , Figure 7 and / or Figure 8 The heat transmission blocking component 300, the heat insulation layer 310, the fire-resistant component 320, the buffer component 330, and the support component 340.

[0087] The support member 340 may include a buffer space 344. The buffer space 344 may be an empty space formed within a frame (e.g., a first frame 342 and / or a second frame 343). In one embodiment, the buffer space 344 may allow the frames 342, 343 to deform. For example, the buffer space 344 deforms based on the shape deformation (e.g., expansion) of the cell 100, thereby reducing the gap between the heat propagation blocking assembly 300 and the pocket 110 of the cell 100. As another example, when the insulation layer 310, the fire-resistant member 320, and the buffer member 330 are inserted into the receiving space 341 of the support member 340, the buffer space 344 deforms, thereby increasing the spacing between the protrusions 345, thus improving assembly convenience. In one embodiment, the buffer space 344 can reduce the weight of the frames 342, 343. This weight reduction in the frames 342, 343 can reduce the weight of the cell assembly 101.

[0088] The support member 340 may include a protrusion 345 extending from the frames 342, 343. The protrusion 345 may prevent the insulation layer 310, the fire-resistant member 320, and the cushioning member 330 from detaching. For example, the support member 340 may include a pair of protrusions 345, and the insulation layer 310, the fire-resistant member 320, and the cushioning member 330 may be inserted between the pair of protrusions 345 and engaged with the frames 342, 343. The protrusions 345 may surround the edges of the insulation layer 310, the fire-resistant member 320, and the cushioning member 330.

[0089] The protrusion 345 may form a slit 346. The slit 346 may be referred to as part of the receiving space 341 (e.g., the edge region of the receiving space 341). The slit 346 may accommodate at least a portion of the edge of the insulation layer 310, the fire-resistant member 320, and the buffer member 330.

[0090] The support member 340 can seal at least a portion of the space between the battery cells 100. The support member 340 can reduce or prevent the propagation of flame, gas, and / or conductive particles between the battery cells 100. In one embodiment, frames 342 and 343 can be connected to a sealing portion (e.g., Figure 1 The sealing portion 115) faces or contacts the first frame 342. In one embodiment, the first frame 342 may be in contact with the electrode tabs (e.g., Figure 1 The electrode tabs (130) face or are in contact with each other.

[0091] Figure 9 This is an exploded perspective view of a heat-blocking assembly according to one embodiment.

[0092] Reference Figure 9 The heat-blocking component 300 may include a heat insulation layer 310, a fire-resistant component 320, a buffer component 330, and an adhesive layer 350.

[0093] about Figure 3 , Figure 4 and / or Figure 5 The descriptions of the heat propagation blocking component 300, the insulation layer 310, the fire-resistant component 320, and the buffer component 330 are applicable to Figure 9 The heat transmission blocking component 300, the heat insulation layer 310, the fire-resistant component 320 and the buffer component 330.

[0094] The heat-blocking assembly 300 may include an adhesive layer 350 for connecting the insulation layer 310, the fire-resistant member 320, and the buffer member 330, respectively. For example, the adhesive layer 350 may include: a first adhesive layer 351 located between the first buffer pad 331 and the first fire-resistant sheet 321; a second adhesive layer 352 located between the first fire-resistant sheet 321 and the insulation layer 310; a third adhesive layer 353 located between the second fire-resistant sheet 322 and the insulation layer 310; and a fourth adhesive layer 354 located between the second fire-resistant sheet 322 and the second buffer pad 332.

[0095] The adhesive layer 350 may include adhesive tape or adhesive. For example, the adhesive layer 350 may contain a material with adhesive properties, such as silicone-based materials, acrylic-based materials, rubber-based materials, hot melt adhesive-based materials, epoxy resin-based materials, pressure-sensitive adhesive (PSA)-based materials, or polyurethane-based materials. The adhesive layer 350 may be a substrate-based, substrate-free, or PSA hot melt adhesive tape. However, the material of the adhesive layer 350 is exemplary, and its use is unrestricted if the material of the adhesive layer 350 can bond the thermal insulation layer 310, the fire-resistant member 320, and the cushioning member 330.

[0096] In one embodiment (e.g., Figure 9 In a heat-blocking assembly 300 including an adhesive layer 350, a support member (e.g., support member 340 of 5) may be removed. In embodiments not shown, the heat-blocking assembly 300 may include the support member 340 and the adhesive layer 350. For example, the support member 340 may accommodate a heat insulation layer 310, a fire-resistant member 320, a buffer member 330, and the support member 340.

[0097] Figure 10 This is an exploded perspective view of a battery pack according to one embodiment.

[0098] Reference Figure 10 The battery pack 500 may include at least one battery module 200 and a battery pack frame 510 that houses at least one battery module 200. (Regarding...) Figure 2 The instructions for battery module 200 are applicable to Figure 10 Battery module 200. For example. Figure 10 The battery module 200 can accommodate including Figure 3 The battery cell assembly (e.g., cell 100 and heat propagation blocking component 300) Figure 3 (Battery cell assembly 101).

[0099] The battery pack frame 510 can accommodate components of the battery pack 500 (e.g., battery module 200). The battery pack frame 510 may include: a bottom member 511 supporting the battery module 200; a battery pack cover 512 covering the battery module 200; and a battery pack sidewall 513 connecting the bottom member 511 and the battery pack cover 512. The bottom member 511 can support the receiving portion of the battery module 200 (e.g., battery module 200). Figure 2 (The receiving part 212).

[0100] The battery pack frame 510 may include a separator 514 that traverses at least a portion of the plurality of battery modules 200. For example, the receiving space of the battery pack frame 510 may be divided into a plurality of spaces by the separator 514. The separator 514 may be configured to traverse the receiving space to enhance the rigidity of the battery pack frame 510. In one embodiment, at least a portion of the plurality of separators 514 may include vent holes for guiding the path of gases and / or flames generated in the battery modules 200.

[0101] In one embodiment, the battery pack 500 may include a conduit member 560. The conduit member 560 may include a flow space for providing a path for gases and / or flames discharged from the battery module 200. The conduit member 560 may be disposed inside the battery pack frame 510. The flow space of the conduit member 560 may be connected to an exhaust port of the separator 514. For example, the battery cells of the battery module 200 (e.g., Figure 1 Gases and / or flames generated in the battery cell 100 can be transmitted to the outside of the battery pack 500 through the vent holes and flow space formed in the separator 514 and the pipe member 560.

[0102] The battery pack 500 may include a battery control unit 590 for controlling the battery module 200. The battery control unit 590 may be disposed inside the battery pack frame 510. The battery control unit 590 may include a battery management system (BMS). The structure of the battery control unit 590 is known in various forms, and therefore a detailed description is omitted. In one embodiment, the battery control unit 590 may be referred to as a processor.

[0103] The above content is merely an example of applying the principles of this disclosure, and other configurations may be further included without departing from the scope of this disclosure.

[0104] The embodiments of this disclosure have been described above, but the scope of this disclosure is not limited thereto. It will be apparent to those skilled in the art that various modifications and variations can be made without departing from the technical concept of this disclosure as set forth in the claims. For example, this disclosure can be implemented by deleting some components from the above embodiments, and the various embodiments can be combined with each other.

[0105] In a first aspect, the battery module may include: a plurality of battery cells; and a heat propagation blocking component located between at least a portion of the plurality of battery cells, the heat propagation blocking component including: a heat insulation layer comprising silica aerogel; a fire-resistant component including a first fire-resistant sheet located on a first surface of the heat insulation layer and a second fire-resistant sheet located on a second surface of the heat insulation layer opposite to the first surface; and a buffer component including a first buffer pad located on the first fire-resistant sheet and a second buffer pad located on the second fire-resistant sheet.

[0106] Secondly, according to the first aspect, the heat propagation blocking assembly may include a support member, the support member comprising: a receiving space for receiving the heat insulation layer, the fire-resistant member and the buffer member; and a frame surrounding the receiving space.

[0107] Thirdly, according to the second aspect, the support member may include a protrusion extending from the frame and surrounding the edges of the insulation layer, the fire-resistant member, and the buffer member.

[0108] Fourthly, according to the second or third aspect, the support member may include a buffer space formed within the frame.

[0109] Fifthly, according to the second or third aspect, the support member may comprise at least one of polyvinyl chloride, natural rubber, ethylene propylene rubber, nitrile rubber, and polychloroprene.

[0110] Sixthly, according to any one of the first to fifth aspects, the first thermal conductivity of the insulation layer may be lower than the second thermal conductivity of the refractory component.

[0111] In a seventh aspect, according to any one of the first to sixth aspects, the first thermal conductivity of the insulation layer may be less than 0.02 W / mK, and the second thermal conductivity of the refractory component may be less than 0.3 W / mK.

[0112] Eighthly, according to any one of the first to seventh aspects, the first thickness of the insulation layer may be greater than or equal to the second thickness of the first refractory sheet or the second refractory sheet.

[0113] Ninth aspect, according to any one of the first to eighth aspects, the refractory component may contain mica.

[0114] In a tenth aspect, according to any one of the first to ninth aspects, the buffer member may comprise at least one of polyurethane, silicone resin or rubber.

[0115] In an eleventh aspect, according to any one of the first to tenth aspects, the heat propagation blocking assembly may further include an adhesive layer, the adhesive layer comprising: a first adhesive layer located between the first buffer pad and the first refractory sheet; a second adhesive layer located between the first refractory sheet and the heat insulation layer; a third adhesive layer located between the second refractory sheet and the heat insulation layer; and a fourth adhesive layer located between the second refractory sheet and the second buffer pad.

[0116] In a twelfth aspect, according to any one of the first to eleventh aspects, each of the plurality of battery cells includes: an electrode assembly; and a pouch including an electrode receiving portion for receiving the electrode assembly and a sealing portion for sealing at least a portion of the periphery of the electrode receiving portion, the cushioning member being able to face the electrode receiving portion.

[0117] In a thirteenth aspect, according to any one of the first to twelfth aspects, the heat propagation blocking component may surround at least a portion of each of the plurality of battery cells.

[0118] In a fourteenth aspect, a heat propagation blocking component may include: a heat insulation layer comprising silica aerogel; a refractory member comprising a first refractory sheet covering a first side of the heat insulation layer and a second refractory sheet covering a second side of the heat insulation layer opposite to the first side; and a buffer member comprising a first buffer pad covering the first refractory sheet and a second buffer pad covering the second refractory sheet.

[0119] In a fifteenth aspect, according to the fourteenth aspect, the heat propagation blocking assembly further includes a support member comprising: a receiving space for receiving the insulation layer, the fire-resistant member, and the buffer member; and a frame surrounding the receiving space. The support member may include a protrusion extending from the frame and surrounding the edges of the insulation layer, the fire-resistant member, and the buffer member.

[0120] In a sixteenth aspect, according to the fourteenth or fifteenth aspect, the first thermal conductivity of the insulation layer may be lower than the second thermal conductivity of the fire-resistant component.

[0121] In the seventeenth aspect, according to any one of the fourteenth to sixteenth aspects, the first thermal conductivity of the insulation layer is less than 0.02 W / mK, and the second thermal conductivity of the fire-resistant component may be less than 0.3 W / mK.

[0122] Eighteenth aspect, according to any one of aspects fourteen through seventeen, the refractory component may comprise mica.

[0123] In a nineteenth aspect, according to any one of aspects fourteen through eighteen, the heat propagation blocking assembly may further include an adhesive layer comprising: a first adhesive layer located between the first buffer pad and the first refractory sheet; a second adhesive layer located between the first refractory sheet and the heat insulation layer; a third adhesive layer located between the second refractory sheet and the heat insulation layer; and a fourth adhesive layer located between the second refractory sheet and the second buffer pad.

[0124] In a twentieth aspect, the battery pack includes: at least one battery module; and a battery pack frame for housing the at least one battery module, the at least one battery module including: a plurality of battery cells; and a heat propagation blocking assembly located between at least a portion of the plurality of battery cells, the heat propagation blocking assembly including: a heat insulation layer comprising silica aerogel; a fire-resistant member including a first fire-resistant sheet covering a first side of the heat insulation layer and a second fire-resistant sheet covering a second side of the heat insulation layer opposite to the first side; and a cushioning member including a first cushioning pad covering the first fire-resistant sheet and a second cushioning pad covering the second fire-resistant sheet.

Claims

1. A battery module, comprising: Multiple battery cells; as well as A heat propagation blocking component is located between at least a portion of the plurality of battery cells. The heat propagation blocking component includes: The insulation layer comprises silica aerogel; A fire-resistant component includes a first fire-resistant sheet located on a first surface of the insulation layer and a second fire-resistant sheet located on a second surface of the insulation layer opposite to the first surface; and The buffer component includes a first buffer pad located on the first refractory sheet and a second buffer pad located on the second refractory sheet.

2. The battery module according to claim 1, wherein, The heat propagation blocking assembly includes a support member, the support member comprising: The space accommodates the insulation layer, the fire-resistant component, and the buffer component; and A frame that surrounds the containing space.

3. The battery module according to claim 2, wherein, The support member includes a protrusion that extends from the frame and surrounds the edges of the insulation layer, the fire-resistant member, and the cushioning pad.

4. The battery module according to claim 2 or 3, wherein, The support member includes a buffer space formed within the frame.

5. The battery module according to claim 2 or 3, wherein, The support component comprises at least one of polyvinyl chloride, natural rubber, ethylene propylene rubber, nitrile rubber, and polychloroprene.

6. The battery module according to any one of claims 1 to 3, wherein, The first thermal conductivity of the insulation layer is lower than the second thermal conductivity of the fire-resistant component.

7. The battery module according to claim 6, wherein, The first thermal conductivity of the insulation layer is less than 0.02 W / mK. The second thermal conductivity of the refractory component is less than 0.3 W / mK.

8. The battery module according to any one of claims 1 to 3, wherein, The first thickness of the insulation layer is greater than or equal to the second thickness of the first refractory sheet or the second refractory sheet.

9. The battery module according to any one of claims 1 to 3, wherein, The refractory component contains mica.

10. The battery module according to any one of claims 1 to 3, wherein, The cushioning component comprises at least one of polyurethane, silicone resin, or rubber.

11. The battery module according to any one of claims 1 to 3, wherein, The heat propagation blocking component further includes an adhesive layer. The adhesive layer includes: The first adhesive layer is located between the first buffer pad and the first refractory sheet; The second adhesive layer is located between the first refractory sheet and the heat insulation layer; A third adhesive layer is located between the second refractory sheet and the heat insulation layer; and The fourth adhesive layer is located between the second refractory sheet and the second buffer pad.

12. The battery module according to any one of claims 1 to 3, wherein, Each of the plurality of battery cells includes: Electrode assembly; and The bag includes an electrode receiving portion for accommodating the electrode assembly and a sealing portion for sealing at least a portion of the periphery of the electrode receiving portion. The buffer member faces the electrode receiving portion.

13. The battery module according to any one of claims 1 to 3, wherein, The heat propagation blocking component surrounds at least a portion of each of the plurality of battery cells.

14. A heat propagation blocking component, comprising: The insulation layer comprises silica aerogel; A fire-resistant component includes a first fire-resistant sheet covering a first side of the insulation layer and a second fire-resistant sheet covering a second side of the insulation layer opposite to the first side; and The buffer component includes a first buffer pad covering the first refractory sheet and a second buffer pad covering the second refractory sheet.

15. The heat propagation blocking component according to claim 14, wherein, The heat propagation blocking component further includes a support member, the support member comprising: The space accommodates the insulation layer, the fire-resistant component, and the buffer component; and The frame surrounds the accommodating space. The support member includes a protrusion that extends from the frame and surrounds the edges of the insulation layer, the fire-resistant member, and the cushioning pad.

16. The heat propagation blocking assembly according to claim 14 or 15, wherein, The first thermal conductivity of the insulation layer is lower than the second thermal conductivity of the fire-resistant component.

17. The heat propagation blocking component according to claim 16, wherein, The first thermal conductivity of the insulation layer is less than 0.02 W / mK. The second thermal conductivity of the refractory component is less than 0.3 W / mK.

18. The heat propagation blocking assembly according to claim 14 or 15, wherein, The refractory component contains mica.

19. The heat propagation blocking assembly according to claim 14 or 15, wherein, The heat propagation blocking component further includes an adhesive layer. The adhesive layer includes: The first adhesive layer is located between the first buffer pad and the first refractory sheet; The second adhesive layer is located between the first refractory sheet and the heat insulation layer; A third adhesive layer is located between the second refractory sheet and the heat insulation layer; and The fourth adhesive layer is located between the second refractory sheet and the second buffer pad.

20. A battery pack, comprising: At least one battery module; as well as Battery pack frame, accommodating the at least one battery module. The at least one battery module includes: Multiple battery cells; and A heat propagation blocking component is located between at least a portion of the plurality of battery cells. The heat propagation blocking component includes: The insulation layer comprises silica aerogel; A fire-resistant component includes a first fire-resistant sheet covering a first side of the insulation layer and a second fire-resistant sheet covering a second side of the insulation layer opposite to the first side; and The buffer component includes a first buffer pad covering the first refractory sheet and a second buffer pad covering the second refractory sheet.

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