Bus bar assembly

Abstract

The bus bar assembly of the present disclosure may include: a protective member provided on at least a portion of one surface of the bus bar assembly; the bus bar is electrically connected with the plurality of battery cells; and a bus bar frame provided between the bus bar and the plurality of cells and supporting the bus bar.

Description

Technical Field

[0001] This disclosure relates to a busbar assembly. Specifically, it relates to a busbar assembly for delaying thermal propagation (TP) during thermal runaway of a battery cell. Background Technology

[0002] Battery cells generate a significant amount of heat during charging and discharging. If this internal heat cannot be contained in time, flames or heat can spread to adjacent cells, causing substantial damage. Therefore, one of the main challenges is to contain the heat generated inside the battery module in a timely manner and to suppress the spread of flames or heat. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] According to one aspect of this disclosure, a battery module can be provided that can delay (mitigate) the propagation of high-temperature gas (e.g., off gas) or heat inside the battery module due to thermal runaway of the battery cell.

[0005] According to another aspect of this disclosure, a battery module with an extended service life can be provided by improving heat resistance or fire resistance.

[0006] On the other hand, 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 utilize 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.

[0007] (II) Technical Solution

[0008] To address the aforementioned technical problems, a busbar assembly disclosed herein may include: a protective component disposed on at least a portion of one side of the busbar assembly; a busbar electrically connected to a plurality of battery cells; and a busbar frame disposed between the busbar and the plurality of battery cells, and supporting the busbar.

[0009] In one embodiment, the thickness of the protective component may be less than the thickness of the busbar frame or the thickness of the busbar.

[0010] In one embodiment, the melting point of the protective component may be higher than that of the busbar frame.

[0011] In one embodiment, the busbar frame may include partitions that protrude from the side of the busbar assembly facing the multiple battery cells toward the multiple battery cells, and protective components may be disposed on the side of the busbar assembly facing the multiple battery cells and located between the partitions.

[0012] In one embodiment, the protection component may further include a plurality of protection units covering the side of the busbar assembly facing the plurality of cells and spaced apart from each other by a partition.

[0013] In one embodiment, the protective component may cover at least a portion of the partition.

[0014] In one embodiment, the protective component may include a bend that bends along the partition.

[0015] In one embodiment, it may further include: a blocking component disposed among at least a portion of the plurality of cells, the blocking component being insertable between the separators.

[0016] In one embodiment, the protective component may be attached to one side of the busbar assembly.

[0017] In one embodiment, the protective component may comprise a refractory material.

[0018] In one embodiment, multiple battery cells can be stacked in a first direction, and the busbar and busbar frame can be combined in a second direction perpendicular to the first direction. In a third direction perpendicular to the first and second directions, the length of the protective component can be greater than the length of the busbar.

[0019] (III) Beneficial Effects

[0020] According to one embodiment of this disclosure, the propagation of high-temperature gases (e.g., escaping gases) or heat inside the battery module can be delayed (mitigated).

[0021] According to another embodiment of this disclosure, the service life of the battery module can be extended due to improved heat resistance or fire resistance. Attached Figure Description

[0022] Figure 1 This is an exploded view showing a battery module according to an embodiment of the present disclosure.

[0023] Figure 2 This is a diagram illustrating a busbar frame and protective component according to an embodiment of the present disclosure.

[0024] Figure 3 This is a cross-sectional view used to illustrate a battery module according to an embodiment of the present disclosure.

[0025] Figure 4This is a cross-sectional view used to illustrate a battery module according to an embodiment of the present disclosure.

[0026] Figure 5 This is a diagram illustrating a busbar frame and protective component according to another embodiment of the present disclosure.

[0027] Figure 6 This is a cross-sectional view used to illustrate a battery module according to another embodiment of the present disclosure.

[0028] Figure 7 This is a diagram illustrating the busbar frame and protective component according to yet another embodiment of the present disclosure.

[0029] Figure 8 This is a cross-sectional view illustrating a battery module according to yet another embodiment of the present disclosure.

[0030] Figure 9 This is a cross-sectional view illustrating a battery module according to yet another embodiment of the present disclosure.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10: Battery Module 100: Battery Cell

[0033] 300: Busbar assembly; 310: Busbar frame

[0034] 320: Busbar; 315: Partition

[0035] 350: Protective components; 350U: Multiple protection units

[0036] 350B: Bending section; 350S: Side wall section

[0037] 410: First refractory component; 420: Second refractory component Detailed Implementation

[0038] The present disclosure will now be described in detail with reference to the accompanying drawings. However, these are merely examples, and the present disclosure is not limited to the specific embodiments illustrated. Furthermore, in this disclosure, a battery cell refers to a rechargeable and dischargeable battery or a secondary battery.

[0039] Figure 1 This is an exploded view showing a battery module according to an embodiment of the present disclosure.

[0040] Reference Figure 1 According to one embodiment of the present disclosure, a battery module 10 may include a plurality of battery cells 100, a module body 210, a module cover 220, an end plate 230, a busbar assembly 300, and a first fire-resistant component 410.

[0041] Reference Figure 1According to one embodiment of the present disclosure, a battery module 10 may include a plurality of battery cells 100, a module body 210, a module cover 220, an end plate 230, and a busbar assembly 300.

[0042] Each of the multiple battery cells 100 may include an electrode assembly and an outer casing material. The outer casing material of the multiple battery cells 100 may contain the electrode assembly and the electrolyte. For example, the outer casing material may be implemented in various types, such as pouch, prismatic, and cylindrical, depending on its shape.

[0043] Multiple battery cells 100 can be various types of rechargeable batteries, such as lithium-ion batteries, vanadium-ion batteries, all-solid-state batteries, metal-air batteries, sodium-ion batteries, and aluminum-ion batteries.

[0044] Multiple battery cells 100 can be stacked in a first direction X. Multiple battery cells 100 can be arranged at predetermined intervals in the first direction X. Multiple battery cells 100 can output or store electrical energy.

[0045] The blocking member 150 may be disposed among at least a portion of the plurality of battery cells 100. The blocking member 150 may be disposed among the plurality of battery cells 100 in a first direction X. At least a portion of one side of the blocking member 150 may be covered by the plurality of battery cells 100.

[0046] The blocking component 150 may protrude further outward in the third direction Z than the plurality of cells 100. For example, the blocking component 150 may protrude further outward in the third direction Z than the plurality of cells 100 toward the module cover 220. The blocking component 150 may minimize the path of heat or flame propagation to other adjacent cells 100 in the event of thermal runaway of any one cell 100.

[0047] The blocking member 150 may protrude further outward than the plurality of cells 100 in the second direction Y. For example, the blocking member 150 may protrude further towards the end plate 230 than the plurality of cells 100 in the second direction Y. In the first direction X, the end of the blocking member 150 may be disposed between the electrode leads 120. In the first direction X, the end of the blocking member 150 may be alternately disposed with the electrode leads 120.

[0048] The module body 210, module cover 220, and end plate 230 can be combined with each other. The module body 210, module cover 220, and end plate 230 can be combined to form an internal space. The module body 210, module cover 220, and end plate 230 can protect the multiple battery cells 100 housed within the internal space from external impacts or foreign objects. The materials of each of the module body 210, module cover 220, and end plate 230 can include any one of metallic materials or polymers.

[0049] The module body 210, module cover 220, and end plate 230 can internally accommodate multiple battery cells 100. The module body 210 and module cover 220 can be connected to form a hexahedral shape with open front and rear surfaces. The module body 210, module cover 220, and end plate 230 can prevent the multiple battery cells 100 from being damaged by external impact, heat, vibration, or pressure.

[0050] The module body 210 may include an opening 211 opening toward its upper surface. In an embodiment, the module body 210 may include an opening 211 opening in the Z-direction. Multiple battery cells 100 may be disposed on the module body 210 through the opening 211. The module body 210 may include side bodies extending toward its upper surface from the edges of the module body 210 to cover the multiple battery cells 100. In an embodiment, the module body 210 may have a U-shape.

[0051] The module body 210 may overlap with at least a portion of the plurality of battery cells 100. For example, the module body 210 may overlap with a portion of the plurality of battery cells 100 in the third direction Z. The module body 210 may be disposed at the lower part of the plurality of battery cells 100. The module body 210 may overlap with the lower surface of the plurality of battery cells 100 in the third direction Z. The module body 210 may support the plurality of battery cells 100.

[0052] The module body 210 may have high thermal conductivity. For example, the module body 210 may include a heat transfer component between the module body 210 and the plurality of battery cells 100. The heat transfer component may have adhesive strength and thermal conductivity greater than or equal to a reference value. For example, the material of the heat transfer component may be a thermally conductive polymer, such as an epoxy or polyurethane-based material.

[0053] The blocking component 150 and the heat transfer component can be separate components, but the blocking component 150 can simultaneously perform the function of the heat transfer component. For this purpose, the blocking component 150 can be formed as a composite layer.

[0054] Module cover 220 can be attached to module body 210. Module cover 220 can be attached to module body 210 to form the inner side of a space accommodating multiple battery cells 100. Module cover 220 can be attached to module body 210 to close opening 211. Module cover 220 can overlap at least a portion of the multiple battery cells 100 in a third direction Z. For example, module cover 220 can overlap the upper surface of the multiple battery cells 100. Module cover 220 can cover at least a portion of the upper surface of the multiple battery cells 100.

[0055] The module cover 220 may overlap with the busbar assembly 300 in the third direction Z. For example, the module cover 220 may cover the upper surface of the busbar assembly 300.

[0056] End plate 230 can be connected to module body 210 and module cover 220 to form one side of the internal space accommodating multiple battery cells 100. End plate 230 can be disposed on one side of the multiple battery cells 100. For example, end plate 230 can overlap with the side of the multiple battery cells 100 in the second direction Y. End plate 230 can cover the side of the multiple battery cells 100 in the second direction Y. End plate 230 can be disposed across the multiple battery cells 100 in the second direction Y. For example, one end plate 230 can be disposed in front of the multiple battery cells 100, and another end plate 230 can be disposed behind the multiple battery cells 100.

[0057] End plate 230 may overlap at least a portion of busbar assembly 300. For example, end plate 230 may overlap one side of busbar assembly 300 in the second direction Y. End plate 230 may cover one side of busbar assembly 300 in the second direction Y.

[0058] Busbar assembly 300 can electrically connect at least a portion of a plurality of battery cells 100. Busbar assembly 300 can be connected to a plurality of battery cells 100.

[0059] The busbar assembly 300 may overlap with the plurality of battery cells 100 in the protruding direction of the electrode leads 120. The busbar assembly 300 may be disposed on one side of the plurality of battery cells 100. The busbar assembly 300 may be disposed on the outer side of the plurality of battery cells 100 in a second direction Y. The busbar assembly 300 may extend along a first direction X along the stacking of the plurality of battery cells 100.

[0060] Busbar assembly 300 may include busbar frame 310 and busbar 320. Busbar 320 may be connected to busbar frame 310. Busbar frame 310 may be disposed between busbar 320 and multiple battery cells 100. Busbar frame 310 may contain a rigid, non-conductive material. For example, busbar frame 310 may contain plastic. More specifically, busbar frame 310 may be formed of engineering plastic. The melting point of busbar frame 310 may be lower than the melting point of protective component 350.

[0061] Additionally, each electrode lead 120 included in the plurality of cells 100 may pass through the busbar frame 310. The busbar frame 310 may include holes through which the electrode leads 120 pass. For example, the busbar frame 310 may include slits. The electrode leads 120 may pass through the busbar frame 310 and be inserted into the busbar 320.

[0062] Multiple busbars 320 can be formed. A busbar 320 can be connected to a busbar frame 310 on a side that does not face the multiple battery cells 100. Electrode leads 120 are inserted into the busbars 320, thereby electrically connecting the multiple battery cells 100 and the busbars 320. The busbars 320 may include holes for inserting the electrode leads 120. For example, the busbars 320 may include slits.

[0063] The protective component 350 may be disposed on one side of the busbar frame 310. Specifically, the protective component 350 may cover at least a portion of the side of the busbar frame 310 facing the plurality of battery cells 100. The protective component 350 may overlap with the side of the busbar frame 310 facing the plurality of battery cells 100. For example, the protective component 350 may be attached to the side of the busbar frame 310 facing the plurality of battery cells 100 by an adhesive. As another example, the protective component 350 may be injection molded together with the busbar frame 310 to be disposed on the side of the busbar frame 310 facing the plurality of battery cells 100.

[0064] The protective component 350 may contain a refractory material. For example, the protective component 350 may contain mica. The melting point of the protective component 350 may be higher than that of the busbar frame 310. Therefore, even if the temperature rises due to flames or heat generated in the cell 100, the shape of the busbar frame 310 covered by the protective component 350 is not easily damaged.

[0065] Regarding protective component 350, please refer to the following: Figure 2 Please provide a detailed explanation.

[0066] The first fire-resistant component 410 can be disposed between the plurality of battery cells 100 and the busbar assembly 300. The first fire-resistant component 410 can be located in the space formed by the electrode leads 120 of two adjacent battery cells 100 and the busbar assembly 300. The first fire-resistant component 410 can occupy most of the volume of the space formed by the electrode leads 120 of two adjacent battery cells 100 and the busbar assembly 300. The first fire-resistant component 410 can have a columnar shape.

[0067] The first refractory component 410 may comprise refractory particles. For example, the first refractory component 410 may be formed into a column shape by bonding the refractory particles with an adhesive. The refractory particles may be solid particles, powders, granules, pellets, or beads. The adhesive material may be a polymer such as resin. Alternatively, the adhesive may be a heat-resistant or flame-retardant material. The adhesive may fill the multiple pores formed between the refractory particles when they come into contact, and may also be coated on the outer surface of the first refractory component 410.

[0068] The refractory particles can be micrometers in size. These micrometer-sized refractory particles can be referred to as microbeads or microgranules. The melting point of the refractory particles is preferably higher than the preset allowable temperature of the battery cell 100.

[0069] The refractory particles may contain porous materials. Porous materials refer to materials whose internal structure includes pores. The shape of the pores can be an irregular amorphous shape. Specifically, if the refractory particles include granular or powdered silica gel, the porosity of the refractory particles can be above 20% and below 30%.

[0070] For example, the first refractory component 410 may include a refractory (heat-resistant or flame-retardant) material. The refractory material may be an inorganic compound. The inorganic compound may be selected from alum (K2SO4·Al2(SO4)3·24H2O), borax (Na2B4O7·10H2O), lime water (Ca(OH)2 aqueous solution), quicklime (CaO), milk of lime (a white emulsion made by mixing calcium hydroxide (Ca(OH)2) with water), slaked lime (Ca(OH)2), washing soda (Na2CO3·10H2O), apatite (Ca5(PO4)3OH), baking powder (a mixture of sodium bicarbonate (NaHCO3) and tartrate), baking soda (NaHCO3), sodium thiosulfate pentahydrate (hypo). The following compounds, or mixtures thereof, are also included: Na2S2O3·5H2O, silicon dioxide (Silica or SiO2), aluminum oxide (Al2O3), calcium oxide (CaO), calcium sulfate (CaSO4), calcium chloride (CaCl2), sodium carbonate (Na2CO3), potassium chloride (KCl), magnesium oxide (MgO), zirconium oxide (ZrO2), chromium oxide (Cr2O3), aluminum hydroxide (Al(OH)3), antimony trioxide (Sb2O3), antimony pentoxide (Sb2O5), magnesium hydroxide (Mg(OH)2), and any one of zinc borate compounds, phosphorus compounds, nitrogen-based guanidine compounds, or molybdenum compounds.

[0071] For example, the refractory particles can be formed of silicon dioxide. Considering the melting point of silicon dioxide (1713°C), the refractory particles can minimize the propagation of heat or escaping gases generated during thermal runaway to other locations. Furthermore, in the event of cell thermal runaway, the shape of the refractory particles will remain unchanged.

[0072] As another example, the refractory particles can be formed from silica gel. The silica gel is a porous material in powder form produced by acid treatment of an aqueous solution of sodium silicate (Na₂SiO₃). Specifically, silica gel is obtained by mixing sodium silicate with an aqueous inorganic acid solution (e.g., sulfuric acid) to form a silica hydrosol, and then solidifying the silica hydrosol into a hydrogel. Considering conventional methods for preparing the silica gel, the main component (comprising 50% or more) is silicon dioxide, and other components may include alumina, iron(III) oxide (Fe₂O₃, Iron(III) Oxide, or Ferric Oxide), or sodium. Therefore, the melting point of the silica gel can also be approximately 1600°C or higher.

[0073] Preferably, the silica gel may contain more than 90% silica. Furthermore, since the silica gel is a porous material, the porosity of the refractory particles may be more than 20% and less than 30%. In other words, the refractory particles may contain silica.

[0074] In the 94V test (Vertical Burning Test) conducted by Underwriters Laboratories (UL) for flame retardant standards of polymer materials, the polymer material of the fire-resistant particles can achieve a V-0 rating.

[0075] The refractory particles may contain flame-retardant polymers. The flame-retardant material may be a phosphorus-based flame retardant, a halogen-based flame retardant, or an inorganic flame retardant. Preferably, the phosphorus-based flame retardant material may contain phosphate compounds, phosphonate compounds, phosphinate compounds, phosphine oxide compounds, phosphazene compounds, and their metal salts. These may be used alone or in combination of two or more.

[0076] In another specific embodiment, the phosphorus-based flame retardant may be diphenyl phosphate, diaryl phosphate, triphenyl phosphate, tricresyl phosphate, tri(xyl) phosphate, tris(2,6-dimethylphenyl) phosphate, tris(2,4,6-trimethylphenyl) phosphate, tris(2,4-di-tert-butylphenyl) phosphate, bisphenol A bis(diphenyl phosphate), resorcinol bis(diphenyl phosphate), resorcinol bis[bis(2,6-dimethylphenyl) phosphate], resorcinol bis[bis(2,4-di-tert-butylphenyl) phosphate], hydroquinone bis[bis(2,6-dimethylphenyl) phosphate], hydroquinone bis[bis(2,4-di-tert-butylphenyl) phosphate], oligophosphate compounds, etc., but is not limited thereto. These can be used alone or in mixtures of two or more.

[0077] The melting point of the first refractory component 410 may be higher than the ignition point of the plurality of battery cells 100. The ignition point of the plurality of battery cells 100 may be the temperature at which the battery cell 100 vents. Alternatively, the ignition point may be the temperature of the electrolyte contained inside the battery cell 100 when the outer casing (or housing) of the battery cell 100 ruptures or opens under thermal runaway conditions.

[0078] For example, when any one of the battery cells 100 begins thermal runaway, the adhesive of the first refractory component 410 begins to melt, but the refractory particles can maintain a solid state. Even if thermal runaway of the battery cell 100 occurs, the refractory particles will not burn or melt, and the shape of the refractory particles can remain essentially unchanged.

[0079] Refractory particles can contain porous materials. Porous materials refer to materials whose internal structure includes pores, and the shape of the pores can be irregular amorphous.

[0080] Figure 2 This is a diagram illustrating a busbar frame and protective component according to an embodiment of the present disclosure.

[0081] Reference Figure 2 The busbar frame 310 may include a support 311, a first through hole 313, and a partition 315.

[0082] The support portion 311 can be disposed between the partitions 315. The support portion 311 can support the busbar ( Figure 1 320). Busbar ( Figure 1 The 320) can be disposed on one side of the support 311. Specifically, the busbar ( Figure 1 320) can be set in the support part 311 without being connected to multiple cells ( Figure 1 On the side facing the multiple cells 100. The support part 311 can support the busbar ( ) on the side not facing the multiple cells 100. Figure 1(320).

[0083] The support portion 311 can overlap with the protective component 350. The support portion 311 is connected to multiple battery cells ( Figure 1 The side facing the support 311 (100) can be covered by the protective component 350. That is, busbars can be respectively provided on the two opposite sides of the support 311. Figure 1 (320) and protective component 350.

[0084] A first through hole 313 can be provided on the support 311. From multiple battery cells ( Figure 1 100) protruding electrode leads ( Figure 1 120) can be inserted into the first through hole 313.

[0085] A partition 315 can be disposed between adjacent support portions 311. The partition 315 can separate adjacent support portions 311. For example, the partition 315 can separate the support portion 311 from multiple battery cells (…). Figure 1 The space between the 100 cells is separated by the partition 315. The partition 315 can extend from the support 311 to multiple cells ( Figure 1 (100) is prominent.

[0086] The protective component 350 can be installed in the support 311 with multiple battery cells. Figure 1 On the side facing the 100) of the support 311. The protective component 350 can cover the support 311 and multiple battery cells ( Figure 1 The 100) aspect of what we face.

[0087] The protection component 350 may include a plurality of protection units 350U. The plurality of protection units 350U may be disposed on the side of the busbar frame 310 facing the plurality of cells 100 and located between the separators 315. The plurality of protection units 350U may correspond to the support portions 311 of the busbar frame 310. For example, the plurality of protection units 350U may cover each support portion 311 between the separators 315.

[0088] Multiple protection units 350U can be disposed between partitions 315. Multiple protection units 350U can be separated from each other by partitions 315. Multiple protection units 350U can each be separate as an independent structure. The protection component 350 may include a second through-hole 353 corresponding to the first through-hole 313 of the busbar frame 310.

[0089] Figure 2 The protective component 350 is shown as a quadrilateral, but the embodiment is not limited to this. The protective component 350 can be modified into various shapes according to the embodiment.

[0090] Figure 3 This is a cross-sectional view used to illustrate a battery module according to an embodiment of the present disclosure.

[0091] Reference Figure 3 The first fire-resistant component 410 can be disposed between the busbar frame 310 and the plurality of battery cells 100. Furthermore, the first fire-resistant component 410 can be disposed between any one of the battery cells 100 and the respective electrode leads 120 of an adjacent battery cell 100. That is, the first fire-resistant component 410 can be inserted into the space formed between the electrode leads 120 of two adjacent battery cells 100.

[0092] When a flame or heat occurs in any of the battery cells 100, the flame or heat may rapidly spread to adjacent battery cells 100. The flame or heat can also spread through the battery module (…). Figure 1 The 10) internal empty space diffuses. To prevent this, the battery module needs to be filled with flame-retardant material. Figure 1 The empty space inside (10). The first fire-resistant component 410 can be filled with the battery module ( Figure 1 10) An empty space inside to prevent the spread of flames or heat.

[0093] The protective component 350 can be separated from the busbar 320 by the busbar frame 310. Specifically, the protective component 350 can be disposed on the side of the busbar frame 310 facing the plurality of battery cells 100, while the busbar 320 can be disposed on the other side of the busbar frame 310 opposite to the plurality of battery cells 100.

[0094] The protective member 350 may be disposed on the side of the busbar frame 310 facing the first fire-resistant member 410. The protective member 350 may not cover the entire side of the busbar frame 310. For example, multiple protective units 350U may extend along the support 311, but may not extend along the partition 315. The protective member 350 may not be disposed on the partition 315 of the busbar frame 310. That is, the protective member 350 may cover the side of the support 311 facing the multiple battery cells 100, but not the partition 315. The protective member 350 may not be disposed in the recessed space 315SP between the partition 315 and the support 311.

[0095] The thickness TH350 of the protective component can be less than the thickness TH310 of the busbar frame. Specifically, the thickness TH350 of the protective component can refer to the thickness of the protective component 350 in the second direction Y. The thickness TH310 of the busbar frame can refer to the thickness of the busbar frame 310 in the second direction Y.

[0096] Furthermore, the thickness TH350 of the protective component can be less than the thickness TH320 of the busbar. Similarly, the thickness TH320 of the busbar can refer to the thickness of the busbar 320 in the second direction Y.

[0097] Figure 3 The diagram shows that the thickness TH350 of the protective component is less than the thickness TH310 of the busbar frame or the thickness TH320 of the busbar, but the embodiment is not limited thereto. For example, the thickness TH350 of the protective component may be greater than or equal to the thickness TH310 of the busbar frame or the thickness TH320 of the busbar.

[0098] The blocking member 150 can be inserted between the partitions 315. Specifically, the partitions 315 can protrude from the support 311. The busbar frame 310 may include a recessed space 315SP between the partitions 315 and the support 311. The end of the blocking member 150 can be inserted into the recessed space 315SP. The blocking member 150 and the partitions 315 can be used as a reference to separate the space disposed on one side and the space disposed on the other side.

[0099] The first fire-resistant component 410 may not be provided in the recessed space 315SP into which the blocking component 150 is inserted. The first fire-resistant component 410 may not be inserted where the blocking component 150 is provided between the busbar frame 310 and the plurality of cells 100.

[0100] Figure 4 This is a cross-sectional view used to illustrate a battery module according to an embodiment of the present disclosure.

[0101] Reference Figure 4 The protective component 350 can be disposed between the first fire-resistant component 410 and the busbar frame 310. The protective component 350 can cover the side of the busbar frame 310 facing the first fire-resistant component 410.

[0102] In the third direction Z, the length of the protective component 350 may be greater than the length of the busbar 320. However, the embodiment is not limited to this. For example, in the third direction Z, the length of the protective component 350 may be less than or equal to the length of the busbar 320.

[0103] Figure 4 The protective component 350 and the first fire-resistant component 410 are shown to be spaced apart, but the embodiment is not limited thereto. For example, the protective component 350 and the first fire-resistant component 410 may be in contact.

[0104] A first fire-resistant member 410 is provided to prevent the spread of flame or heat to adjacent cells 100 in the event of a flame or heat in a particular cell 100. On the other hand, if the busbar frame 310, which has a relatively low melting point, melts, the first fire-resistant member 410, which is positioned between the busbar frame 310 and the cell 100, may move outward from the busbar frame 310 because its position is not fixed. Therefore, the first fire-resistant member 410 may not be able to suppress the spread of flame or heat.

[0105] The melting point of the protective component 350 can be higher than that of the busbar frame 310. Therefore, even if a fire or heat occurs in the cell 100, structural damage to the busbar frame 310 on the surface covered by the protective component 350 will be suppressed. Thus, by suppressing damage to the busbar frame 310 through the protective component 350, the position of the first fire-resistant component 410 can be stably fixed. In this way, even if a fire or heat occurs in the cell 100, the first fire-resistant component 410 can prevent the flame or heat from spreading to other adjacent cells 100.

[0106] Figure 5 This is a diagram illustrating a busbar frame and protective component according to another embodiment of the present disclosure. For ease of explanation, the diagram mainly revolves around the reference numerals. Figure 2 Explain the different parts of the content.

[0107] Reference Figure 5 The protective component 350 may include a bending portion 350B. The bending portion 350B may be disposed between multiple protective units 350U. The bending portion 350B may connect multiple protective units 350U. The connection between the multiple protective units 350U and the bending portion 350B allows the protective component 350 to be integrally formed.

[0108] The bending section 350B can be directed from multiple protection units 350U toward multiple cells ( Figure 1 (100) Bending. The bending portion 350B can correspond to the partition 315 of the busbar frame 310. The bending portion 350B can cover the partition 315 of the busbar frame 310.

[0109] Figure 6 This is a cross-sectional view used to illustrate another embodiment of the battery module according to the present disclosure. For ease of explanation, the view is mainly centered around and referenced to... Figure 3 Explain the different parts of the content.

[0110] Reference Figure 6 The bending portion 350B can extend along the partition 315. For example, the protective member 350 can cover the entire side of the busbar frame 310 facing the plurality of cells 100. The plurality of protective units 350U can extend along the support portion 311, and the bending portion 350B can extend along the partition 315. The bending portion 350B can be bent along the partition 315. The protective member 350 can cover at least a portion of the partition 315.

[0111] The recessed space between the partition 315 and the support 311 ( Figure 3 A protective component 350 can be installed in the recessed space (315SP). Therefore, the blocking component 150 can be installed in the recessed space ( Figure 3 The protective member 350 is provided in the recessed space (315SP). For example, the blocking member 150 may be provided in the recessed space (315SP). Figure 3 It contacts the protective component 350 in the 315SP.

[0112] Figure 7 This is a diagram illustrating a busbar frame and protective component according to yet another embodiment of the present disclosure. For ease of explanation, the diagram mainly focuses on the reference to... Figure 5 Explain the different parts of the content.

[0113] Reference Figure 7 The protection component 350 may include a sidewall portion 350S. The sidewall portion 350S can extend from multiple protection units 350U toward multiple battery cells ( Figure 1 (100) bend. For example, the side wall portion 350S may intersect perpendicularly with multiple protection units 350U. Two adjacent side wall portions 350S may not be connected to each other. The side wall portion 350S may cover the side of the partition 315.

[0114] Figure 8 This is a cross-sectional view used to illustrate a battery module according to yet another embodiment of the present disclosure. For ease of explanation, the view is mainly centered around and referenced to... Figure 6 Explain the different parts of the content.

[0115] Reference Figure 8 The sidewall portion 350S may cover the side of the partition 315. The protective member 350 may cover at least a portion of the partition 315. The sidewall portion 350S may not extend along the entire partition 315, but may cover the side of the partition 315 that does not face the blocking member 150. For example, the sidewall portion 350S may cover the side of the partition 315 that faces the electrode lead 120. The sidewall portion 350S may not be provided between the blocking member 150 and the partition 315. The sidewall portion 350S may not be provided in the recessed space ( Figure 3 In 315SP). In the recessed space between the partitions 315 ( Figure 3 In the 315SP), the sidewall portions 350S may not be connected to each other.

[0116] Figure 9 This is a cross-sectional view used to illustrate a battery module according to yet another embodiment of the present disclosure. For ease of explanation, the view is mainly centered around and referenced to... Figure 3 Explain the different parts of the content.

[0117] Reference Figure 9 The battery module 10 may include a second refractory component 420. The second refractory component 420 may include a plurality of granular materials in particulate form.

[0118] The second refractory component 420 may include a solid filler. For example, the solid filler may be in the form of solid particles, powder, granules, pellets, or beads. The solid filler may contain a refractory (heat-resistant or flame-retardant) material. The refractory material may be an inorganic compound. That is, the solid filler may contain a refractory material formed from an inorganic compound. The second refractory component 420 and the first refractory component ( Figure 1 (410) differs only in shape and may contain the same material.

[0119] Figure 9 The second refractory component 420 is shown to consist of spherical particles of the same size, but the embodiment is not limited to this. For example, the individual particles of the second refractory component 420 may not be spherical and may have different sizes.

[0120] The above description is merely an example of applying the principles of this disclosure, and other structures may be included without departing from the scope of this utility model.

Claims

1. A busbar assembly, characterized in that, include: A protective component is disposed on at least a portion of one side of the busbar assembly; Busbar, electrically connected to multiple battery cells; as well as A busbar frame is disposed between the busbar and the plurality of battery cells and supports the busbar.

2. The busbar assembly according to claim 1, characterized in that, The thickness of the protective component is less than the thickness of the busbar frame or the thickness of the busbar.

3. The busbar assembly according to claim 2, characterized in that, The melting point of the protective component is higher than that of the busbar frame.

4. The busbar assembly according to claim 2, characterized in that, The busbar frame includes a partition that protrudes from the side of the busbar assembly facing the plurality of battery cells toward the plurality of battery cells. The protective component is disposed on the side of the busbar assembly facing the plurality of cells and is located between the partitions.

5. The busbar assembly according to claim 4, characterized in that, The protective component further includes a plurality of protective units that cover the side of the busbar assembly facing the plurality of battery cells and are separated from each other by the partition.

6. The busbar assembly according to claim 4, characterized in that, The protective component covers at least a portion of the partition.

7. The busbar assembly according to claim 6, characterized in that, The protective component includes a bent portion that bends along the partition.

8. The busbar assembly according to claim 4, characterized in that, Further includes: A blocking component is disposed among at least a portion of the plurality of battery cells. The blocking component is inserted between the partitions.

9. The busbar assembly according to claim 1, characterized in that, The protective component is attached to one side of the busbar assembly.

10. The busbar assembly according to any one of claims 1 to 9, characterized in that, The protective component contains refractory material.

11. The busbar assembly according to claim 1, characterized in that, The plurality of battery cells are stacked in the first direction. The busbar and the busbar frame are joined in a second direction perpendicular to the first direction. In a third direction perpendicular to the first and second directions, the length of the protective component is greater than the length of the busbar.

Images