Battery module

Abstract

A battery module disclosed herein includes: a plurality of battery cells; a cover portion overlapping at least a portion of the plurality of battery cells; a blocking member disposed in at least one of the spaces between the plurality of battery cells and protruding further than the plurality of battery cells toward the cover portion; a first protruding portion protruding from the cover portion toward the plurality of battery cells and including a pair of protrusions; and a venting flow path formed inside the cover portion, wherein the blocking member is inserted between the pair of protrusions of the first protruding portion.

Description

battery module

[0001] The present disclosure relates to a battery module.

[0002] Secondary batteries are rechargeable and dischargeable batteries that can be used in a wide range of mobility devices, including portable electronic devices, automobiles, ships, aircraft, and drones. Secondary batteries can be utilized as battery assemblies, electrically connecting multiple battery cells to increase battery capacity or output. Battery assemblies can be categorized into battery modules or battery packs, depending on their unit size.

[0003] Due to their structure, battery modules contain multiple battery cells. Therefore, heat or gases from a specific battery cell can easily spread to adjacent cells. Consequently, measures to improve the stability of battery modules are needed.

[0004] First, according to one aspect of the present disclosure, a battery module with improved thermal stability is provided.

[0005] Second, according to another aspect of the present disclosure, a battery module having an extended battery life is provided.

[0006] Thirdly, according to another aspect of the present invention, a battery module with improved structural stability is provided.

[0007] Meanwhile, the present disclosure can be widely applied in the field of green technology, such as electric vehicles, battery charging stations, energy storage systems (ESS), and other battery-based solar power generation and wind power generation.

[0008] In addition, the present disclosure can be used in eco-friendly mobility, including electric vehicles and hybrid vehicles, to prevent climate change by suppressing air pollution and greenhouse gas emissions.

[0009] In order to solve the above-described problem, the battery module of the present disclosure includes a plurality of battery cells; a cover portion overlapping at least a portion of the plurality of battery cells; a blocking member disposed between at least one of the plurality of battery cells and protruding more than the plurality of battery cells toward the cover portion; a first protrusion portion protruding from the cover portion toward the plurality of battery cells and including a pair of protrusions; and a venting channel formed inside the cover portion, wherein the blocking member is inserted between the pair of protrusions of the first protrusion portion.

[0010] The plurality of battery cells are stacked in a first direction, the cover part overlaps the plurality of battery cells in a second direction perpendicular to the first direction, and the venting path can extend in either a third direction perpendicular to the first direction and the second direction or the first direction.

[0011] The above first protrusion can extend in the third direction.

[0012] The above cover portion may include a plate portion spaced apart from each other with the venting passage therebetween, and a connecting rib connecting the plate portions and separating the venting passage.

[0013] The plurality of battery cells are stacked in a first direction, the plate portions are spaced apart from each other in a second direction perpendicular to the first direction, and the connecting rib extends in a third direction perpendicular to the first direction and the second direction and can overlap the blocking member in the second direction.

[0014] The space surrounded by the plurality of battery cells, the plate portion, and the blocking member may be connected to the venting passage.

[0015] The above blocking member can be inserted into the insertion space formed by the first protrusion and come into contact with the cover part.

[0016] The above first protrusion can be spaced apart from the plurality of battery cells.

[0017] The battery module may further include a bus bar disposed on one side of the plurality of battery cells so as to be electrically connected to the plurality of battery cells; and a second protrusion protruding from the bus bar toward the plurality of battery cells.

[0018] The depth of the first protrusion may be different from the depth of the second protrusion.

[0019] The second protrusion includes a pair of protrusions, the plurality of battery cells are stacked in a first direction, the cover portion overlaps the plurality of battery cells in a second direction perpendicular to the first direction, and the blocking member can be inserted between a pair of protrusions of the second protrusion along a third direction perpendicular to the first direction and the second direction.

[0020] The above battery module may further include a sealing portion disposed on the second protrusion and in contact with the blocking member.

[0021] The above-mentioned blocking member may include a fire-resistant material.

[0022] The battery module may further include a support body disposed below the plurality of battery cells and spaced apart from the cover portion with the plurality of battery cells interposed therebetween; and a support wall disposed at least in a portion of the space between the plurality of battery cells and extending from the support body to the cover portion to support the cover portion.

[0023] The plurality of battery cells are stacked in a first direction, and along the first direction, the thickness of the support wall may be greater than the thickness of the blocking member.

[0024] In order to solve the above-described problem, the battery module of the present disclosure includes a plurality of battery cells; a cover portion overlapping at least a portion of the plurality of battery cells; a bus bar disposed on one side of the plurality of battery cells so as to be electrically connected to the plurality of battery cells; a blocking member disposed at least one between the plurality of battery cells and protruding from the plurality of battery cells toward one of the cover portion and the bus bar; a venting channel formed inside the cover portion; and a protrusion portion facing one side of the plurality of battery cells and protruding toward the plurality of battery cells from one of the cover portion and the bus bar, the protrusion comprising a pair of protrusions, wherein the blocking member is inserted between the pair of protrusions, and a space surrounded by the blocking member, the plurality of battery cells, and the protrusion portion is in communication with the venting channel.

[0025] The plurality of battery cells are stacked in a first direction, the cover portion overlaps the plurality of battery cells in a second direction perpendicular to the first direction, the protrusion portion includes a first protrusion portion that protrudes from the cover portion toward the plurality of battery cells in the second direction, and the blocking member may protrude toward the cover portion more than the plurality of battery cells.

[0026] The first protrusion may extend in a third direction perpendicular to the first direction and the second direction.

[0027] The plurality of battery cells are stacked in a first direction, the cover portion overlaps the plurality of battery cells in a second direction perpendicular to the first direction, the protrusion portion protrudes from the bus bar toward the plurality of battery cells in a third direction perpendicular to the first direction and the second direction, and the blocking member includes a second protrusion portion inserted along the third direction, and the blocking member can protrude toward the bus bar more than the plurality of battery cells.

[0028] The battery module may further include a support body disposed below the plurality of battery cells and spaced apart from the cover portion with the plurality of battery cells interposed therebetween; and a support wall disposed at least in a portion of the space between the plurality of battery cells and extending from the support body to the cover portion to support the cover portion.

[0029] First, according to one embodiment of the present disclosure, the thermal stability of the battery module can be improved by discharging flames or gases in a safe direction.

[0030] Second, according to one embodiment of the present disclosure, battery life can be improved by reducing thermal propagation (TP).

[0031] Third, according to one embodiment of the present invention, the cover part of the battery module can be supported to improve structural stability.

[0032] FIG. 1 is a drawing showing a battery module according to one embodiment of the present disclosure.

[0033] FIG. 2 is an exploded view of a battery module according to one embodiment of the present disclosure.

[0034] FIG. 3 is a drawing for explaining a battery module according to one embodiment of the present disclosure.

[0035] FIG. 4 is a drawing for explaining a cover part of a battery module according to one embodiment of the present disclosure.

[0036] FIG. 5 is a drawing for explaining a cover part of a battery module according to another embodiment of the present disclosure.

[0037] FIG. 6 is a drawing for explaining a battery module according to one embodiment of the present disclosure.

[0038] Figure 7 is an enlarged view showing part P of Figure 6.

[0039] FIG. 8 is a drawing for explaining a battery module according to one embodiment of the present disclosure.

[0040] FIG. 9 is a drawing for explaining a battery module according to another embodiment of the present disclosure.

[0041] FIG. 10 is a drawing for explaining a battery module according to another embodiment of the present disclosure.

[0042] FIG. 11 is a drawing for explaining a battery module according to another embodiment of the present disclosure.

[0043] The structural or functional descriptions of the embodiments disclosed in this specification or application are merely illustrative for the purpose of explaining embodiments according to the technical idea of ​​the present invention, and the embodiments according to the technical idea of ​​the present invention may be implemented in various forms other than the embodiments disclosed in this specification or application, and the technical idea of ​​the present invention is not construed as being limited to the embodiments described in this specification or application.

[0044] FIG. 1 is a drawing showing a battery module according to one embodiment of the present disclosure.

[0045] Referring to FIG. 1, a battery module (1) according to one embodiment of the present disclosure may include a support body (210), a cover portion (220), an end plate (230), and a support wall (500).

[0046] The support body (210), the cover part (220), and the end plate (230) can be combined with each other. The support body (210), the cover part (220), and the end plate (230) can be combined to form an internal space. The support body (210), the cover part (220), and the end plate (230) can protect a plurality of battery cells (100 in FIG. 2) accommodated in the internal space from external impact or foreign substances. The material of each of the support body (210), the cover part (220), and the end plate (230) can include any one of aluminum, iron, and polymer.

[0047] The support wall (500) can be connected to the support body (210) and the cover part (220). The support wall (500) can be placed between the support body (210) and the cover part (220). The support wall (500) can be placed in an internal space formed by the support body (210), the cover part (220), and the end plate (230). The support wall (500) will be described in detail with reference to FIG. 6.

[0048] FIG. 2 is an exploded view of a battery module according to one embodiment of the present disclosure.

[0049] Referring to FIG. 2, a battery module (1) according to one embodiment of the present disclosure may include a plurality of battery cells (100), a support body (210), a cover portion (220), an end plate (230), a busbar assembly (300), and a support wall (500).

[0050] Each of the plurality of battery cells (100) may include an electrode assembly and an outer case. The outer case of the plurality of battery cells (100) may accommodate the electrode assembly and the electrolyte. For example, the outer case may be implemented in various types, such as a pouch type, a square type, or a cylindrical type, depending on its shape.

[0051] The plurality of battery cells (100) may be various types of secondary batteries, such as lithium ion batteries, vanadium ion batteries, all-solid-state batteries, metal-air batteries, sodium ion batteries, and aluminum ion batteries.

[0052] A plurality of battery cells (100) can be stacked in a first direction (X). The plurality of battery cells (100) can be arranged at regular intervals in the first direction (X). The plurality of battery cells (100) can output or store electric energy.

[0053] The support body (210), the cover part (220), and the end plate (230) can accommodate a plurality of battery cells (100) therein. The support body (210) and the cover part (220) can be connected to form a hexahedral shape with open front and back sides. The support body (210), the cover part (220), and the end plate (230) can prevent damage to the plurality of battery cells (100) from external impact, heat, vibration, or pressure. The cover part (220) can include a hole (H) into which a support wall (500 of FIG. 3) is inserted. The hole (H) can penetrate the cover part (220). The shape of the hole (H) can correspond to the shape of the support wall (500 of FIG. 3).

[0054] In FIG. 2, the cover portion (220) is illustrated as including a hole (H), but the embodiment is not limited thereto. For example, if the support wall (500 in FIG. 3) is connected to the cover portion (220) through another fastening member instead of being inserted into the hole, the cover portion (220) may not include the hole (H).

[0055] The support body (210) may include an opening (211) that is open toward the upper surface. In an embodiment, the support body (210) may include an opening (211) that is open in the second direction (Y). Through the opening (211), a plurality of battery cells (100) may be arranged on the support body (210). The support body (210) may include a side body formed such that an edge extends toward the upper surface to cover the plurality of battery cells (100). In an embodiment, the support body (210) may have a “U” shape.

[0056] The support body (210) can overlap at least a portion of the plurality of battery cells (100). For example, the support body (210) can overlap a portion of the plurality of battery cells (100) in a third direction (Z). The support body (210) can be arranged at the bottom of the plurality of battery cells (100). The support body (210) can overlap the lower surfaces of the plurality of battery cells (100) in the third direction (Z). The support body (210) can support the plurality of battery cells (100).

[0057] The support body (210) may have high thermal conductivity. For example, the support body (210) may include a heat transfer member between the plurality of battery cells (100). The heat transfer member may have adhesive properties and a thermal conductivity higher than a reference value. For example, the material of the heat transfer member may be a polymer having thermal conductivity, such as an epoxy or urethane series material.

[0058] The cover part (220) can be combined with the support body (210). The cover part (220) can be combined with the support body (210) to form an inner surface of the internal space. The cover part (220) can cover the opening (211) of the support body (210). The cover part (220) can overlap at least a portion of the plurality of battery cells (100) in the third direction (Z). For example, the cover part (220) can overlap the upper surfaces of the plurality of battery cells (100). The cover part (220) can cover at least a portion of the upper surfaces of the plurality of battery cells (100).

[0059] The cover portion (220) can overlap the busbar assembly (300) in the third direction (Z). For example, the cover portion (220) can cover the upper surface of the busbar assembly (300).

[0060] The end plate (230) may be connected to the support body (210) and the cover part (220) to form one side of an internal space in which a plurality of battery cells (100) are accommodated. The end plate (230) may be disposed on one side of the plurality of battery cells (100). For example, the end plate (230) may overlap a side of the plurality of battery cells (100) in the second direction (Y). The end plate (230) may cover the side of the plurality of battery cells (100) in the second direction (Y). The end plate (230) may be disposed with the plurality of battery cells (100) interposed therebetween in the second direction (Y). For example, one end plate (230) may be disposed in front of the plurality of battery cells (100), and the other end plate (230) may be disposed in the rear of the plurality of battery cells (100).

[0061] The end plate (230) may overlap at least a portion of the busbar assembly (300). For example, the end plate (230) may overlap one surface of the busbar assembly (300) in the second direction (Y). The end plate (230) may cover one surface of the busbar assembly (300) in the second direction (Y).

[0062] The busbar assembly (300) can electrically connect at least a portion of a plurality of battery cells (100).

[0063] The busbar assembly (300) can cover a plurality of battery cells (100) in the protruding direction of the electrode tabs (120a, 120b of FIG. 3). The busbar assembly (300) can be arranged on the outer side of the plurality of battery cells (100) in the second direction (Y). The busbar assembly (300) can extend along the first direction (X) in which the plurality of battery cells (100) are stacked.

[0064] A busbar assembly (300) may include a busbar frame (310) and a busbar (320). The busbar (320) may be connected to the busbar frame (310). The busbar frame (310) may be positioned between the busbar (320) and a plurality of battery cells (100).

[0065] Additionally, each electrode tab (120a, 120b of FIG. 3) included in a plurality of battery cells (100) may penetrate the busbar frame (310). The busbar frame (310) may include a hole through which the electrode tab (120a, 120b of FIG. 3) penetrates. For example, the busbar frame (310) may include a slit. The electrode tab (120a, 120b of FIG. 3) may penetrate the busbar frame (310) and be inserted into the busbar (320).

[0066] The bus bar (320) may be formed in multiple pieces. The bus bar (320) may be connected to the bus bar frame (310) on one side of the bus bar frame (310) that does not face the plurality of battery cells (100). Electrode tabs (120a, 120b of FIG. 3) may be inserted into the bus bar (320) so that the plurality of battery cells (100) and the bus bar (320) may be electrically connected. The bus bar (320) may include holes into which the electrode tabs (120a, 120b of FIG. 3) are inserted. For example, the bus bar (320) may include slits.

[0067] FIG. 3 is a drawing for explaining a battery module according to one embodiment of the present disclosure.

[0068] Referring to FIG. 3, a plurality of battery cells (100) may include electrode tabs (120a, 120b). The electrode tabs (120a, 120b) may protrude from the plurality of battery cells (100). For example, in the second direction (Y), the electrode tabs (120a, 120b) may protrude from the plurality of battery cells (100). The electrode tabs (120a, 120b) may be electrically connected to electrodes of the electrode assembly. The electrode tabs (120a, 120b) may be exposed to the outside of the outer material. Although FIG. 3 illustrates that the electrode tabs (120a, 120b) protrude in the second direction (Y), the embodiment is not limited thereto. For example, the electrode tabs (120a, 120b) may protrude from the plurality of battery cells (100) in the first direction (X). For another example, the electrode tabs (120a, 120b) may protrude in the third direction (Z) from a plurality of battery cells (100).

[0069] The electrode tabs (120a, 120b) may include a first electrode tab (120a) and a second electrode tab (120b). The first electrode tab (120a) may be electrically connected to one of the positive and negative electrodes of the electrode assembly, and the second electrode tab (120b) may be electrically connected to the other of the positive and negative electrodes.

[0070] In one embodiment, a blocking member (150) may be arranged between at least some of the plurality of battery cells (100). The blocking member (150) may be arranged between the plurality of battery cells (100) in the first direction (X). One side of the blocking member (150) may be covered by the plurality of battery cells (100).

[0071] For example, the blocking member (150) may include a refractory material. For example, the refractory material may include mica, epoxy, silica, aerogel, ceramic wool, urethane, or a material with excellent heat resistance and insulation properties.

[0072] The blocking member (150) may protrude outwardly from the plurality of battery cells (100) in the third direction (Z). For example, the blocking member (150) may protrude toward the cover portion (220 in FIG. 2) from the plurality of battery cells (100) in the third direction (Z). In the third direction (Z), one end of the blocking member (150) may protrude toward the cover portion (220 in FIG. 2) from one surface of the plurality of battery cells (100). In the third direction (Z), one end of the blocking member (150) may not be disposed on the same plane as one surface of the plurality of battery cells (100).

[0073] The blocking member (150) may protrude outwardly from the plurality of battery cells (100) in the second direction (Y). For example, the blocking member (150) may protrude toward the end plate (230 in FIG. 2) from the plurality of battery cells (100) in the second direction (Y). In the second direction (Y), one end of the blocking member (150) may protrude toward the end plate (230 in FIG. 2) from one surface of the plurality of battery cells (100). The blocking member (150) may protrude toward the bus bar (320 in FIG. 2) from the plurality of battery cells (100) in the second direction (Y). In the second direction (Y), one end of the blocking member (150) may not be disposed on the same plane as one surface of the plurality of battery cells (100).

[0074] In the first direction (X), the end portion of the blocking member (150) can be arranged between the electrode tabs (120a, 120b). In the first direction (X), the end portion of the blocking member (150) can be arranged alternately with the electrode tabs (120a, 120b).

[0075] Although FIG. 3 illustrates two battery cells (100) being arranged between blocking members (150), the embodiment is not limited thereto. The number of battery cells (100) arranged between two adjacent blocking members (150) may vary depending on the embodiment.

[0076] A support wall (500) may be disposed between at least a portion of a plurality of battery cells (100) in a first direction (X). The support wall (500) may extend in a second direction (Y). The support wall (500) may be disposed between blocking members (150) in the first direction (X). For example, each side of the support wall (500) opposite to the first direction (X) may be in contact with the plurality of battery cells (100). Each side of the support wall (500) opposite to the first direction (X) may be covered by the plurality of battery cells (100). For another example, each side of the support wall (500) opposite to the first direction (X) may be in contact with the blocking member (150). Each side of the support wall (500) opposite to the first direction (X) may be covered by the blocking member (150).

[0077] The support wall (500) may protrude beyond the plurality of battery cells (100) in the third direction (Z). In the third direction (Z), an end of the support wall (500) may protrude toward the cover portion (220 in FIG. 2) beyond one surface of the plurality of battery cells (100). The support wall (500) may be coupled to the cover portion (220). For example, the support wall (500) may be inserted into a hole (H in FIG. 2) of the cover portion (220).

[0078] FIG. 4 is a drawing for explaining a cover part of a battery module according to one embodiment of the present disclosure.

[0079] Referring to FIG. 4, a cover portion (220) of a battery module according to one embodiment of the present disclosure may include a first plate portion (221), a second plate portion (222), a connecting rib (223), a venting path (250), a venting hole (260), and a first protrusion (400).

[0080] The first plate portion (221) and the second plate portion (222) may be arranged to face each other. The first plate portion (221) and the second plate portion (222) may be arranged to be spaced apart from each other in the third direction (Z). The first plate portion (221) and the second plate portion (222) may be arranged parallel to each other. For example, the second plate portion (222) may face a plurality of battery cells (100 in FIG. 2). The first plate portion (221) may include an outer surface opposite to the second plate portion (222).

[0081] A connecting rib (223) may be arranged between the first plate portion (221) and the second plate portion (222). The connecting rib (223) may connect the first plate portion (221) and the second plate portion (222). The connecting rib (223) may extend in the second direction (Y) between the first plate portion (221) and the second plate portion (222). The connecting rib (223) may extend in the same direction as the direction in which the plurality of battery cells (100) extend. The connecting rib (223) may separate the plurality of venting channels (250).

[0082] A venting passage (250) may be formed within the cover portion (220). The venting passage (250) may be disposed between the first plate portion (221) and the second plate portion (222) in the third direction (Z). The venting passage (250) may be disposed between the connecting ribs (223) in the first direction (X). The venting passage (250) may include a hole penetrating the side surface of the cover portion (220). For example, a hole communicating with the venting passage (250) may be disposed at a side surface of the cover portion (220) facing the second direction (Y). The venting passage (250) may extend in the second direction (Y) along the connecting rib (223). A plurality of venting passages (250) may be disposed within the cover portion (220). A plurality of venting passages (250) may be separated by the connecting ribs (223).

[0083] A venting hole (260) may be arranged in the first plate portion (221). The venting hole (260) may penetrate the first plate portion (221). The venting hole (260) may open a venting path (250) to the outside of the cover portion (220). Flames, gases, dust, etc. within the venting path (250) may be discharged to the outside of the cover portion (220) through the venting hole (260).

[0084] The first protrusion (400) may protrude from the cover portion (220). The first protrusion (400) may protrude from the cover portion (220) in a third direction (Z) toward the plurality of battery cells (100 in FIG. 2). The first protrusion (400) may be disposed on one surface of the second plate portion (222). For example, the first protrusion (400) may be disposed on the lower surface of the second plate portion (222) facing the plurality of battery cells (100 in FIG. 2). The first protrusion (400) may face the plurality of battery cells (100 in FIG. 2). The first protrusion (400) may extend in the second direction (Y). The first protrusion (400) may extend in the same direction as the direction in which the plurality of battery cells (100 in FIG. 2) and the blocking member (150 in FIG. 2) extend. The first protrusion (400) and the venting passage (250) can extend along the second direction (Y). That is, the first protrusion (400) and the venting passage (250) can extend along the same direction.

[0085] The first protrusion (400) may include a pair of protrusions. For example, the first protrusion (400) may include two protrusions spaced apart with a blocking member (150 in FIG. 7) interposed therebetween.

[0086] Although the venting hole (260) is illustrated as being positioned only in the first plate portion (221) in FIG. 4, the embodiment is not limited thereto. For example, the venting hole (260) may of course also be positioned in the second plate portion (222). Flames, gases, dust, etc. generated from a plurality of battery cells (100 in FIG. 2) may be discharged to the venting path (250) through the venting hole (260) positioned in the second plate portion (222).

[0087] Although FIG. 4 illustrates that 12 venting channels (250) are arranged in the cover portion (220), the embodiment is not limited thereto. The number of venting channels (250) formed in the cover portion (220) may vary depending on the embodiment.

[0088] FIG. 5 is a drawing illustrating a cover portion of a battery module according to another embodiment of the present disclosure. For convenience of explanation, the following description focuses on differences from those described with reference to FIG. 4.

[0089] Referring to FIG. 5, the first protrusion (400) and the venting passage (250) may extend in different directions. For example, the first protrusion (400) may extend in the second direction (Y), and the venting passage (250) may extend in the first direction (X). The first protrusion (400) and the venting passage (250) may extend to intersect each other.

[0090] The connecting rib (223) can extend in a first direction (X) between the first plate portion (221) and the second plate portion (222). The connecting rib (223) can extend in the same direction as the direction in which a plurality of battery cells (100 in FIG. 2) are stacked. The venting path (250) can be arranged between the connecting ribs (223) in the second direction (Y). A hole communicating with the venting path (250) can be arranged on the outer surface of the cover portion (220) facing the first direction (X).

[0091] In Fig. 5, five venting channels (250) are arranged in the cover portion (220), but the embodiment is not limited thereto. The number of venting channels (250) formed in the cover portion (220) may vary depending on the embodiment.

[0092] Fig. 6 is a drawing for explaining a battery module according to one embodiment of the present disclosure. Fig. 7 is an enlarged view showing portion P of Fig. 6.

[0093] Referring to FIGS. 6 and 7, a plurality of battery cells (100) may be stacked in a first direction (X). In the first direction (X), a blocking member (150) may be arranged between at least some of the plurality of battery cells (100). The blocking member (150) may extend in a third direction (Z).

[0094] The first end (150S1) of the blocking member (150) may protrude further than the first surfaces (100S1) of the plurality of battery cells. The first end (150S1) of the blocking member (150) may refer to one end of the blocking member (150) facing the cover portion (220). The first surfaces (100S1) of the plurality of battery cells may refer to one surface of the plurality of battery cells (100) facing the cover portion (220). The first end (150S1) of the blocking member (150) may not be disposed on the same plane as the first surfaces (100S1) of the plurality of battery cells. The first end (150S1) of the blocking member (150) may protrude further than the first surfaces (100S1) of the plurality of battery cells toward the cover portion (220).

[0095] The blocking member (150) can be inserted into the first protrusion (400). At least a portion of the blocking member (150) can be inserted into the first protrusion (400). Specifically, the first end (150S1) of the blocking member (150) can be inserted into the first protrusion (400). The blocking member (150) can be inserted into an insertion space (SP400) formed by the first protrusion (400). The insertion space (SP400) can refer to a space formed by a pair of protrusions of the first protrusion (400) and the cover portion (220).

[0096] The first end (150S1) may be positioned between a pair of protrusions of the first protrusion (400). The first end (150S1) may not be in contact with the cover portion (220). The first end (150S1) may be spaced apart from the second plate portion (222) in the third direction (Z).

[0097] The blocking member (150) may overlap the connecting rib (223) at least partially in the third direction (Z). For example, the blocking member (150) may be arranged in a straight line with the connecting rib (223). The position of the blocking member (150) may correspond to the position of the connecting rib (223). However, the embodiment is not limited thereto. For example, the blocking member (150) may not overlap the connecting rib (223) in the third direction (Z). It goes without saying that the blocking member (150) may not be arranged in a straight line with the connecting rib (223) but may be arranged in an intersecting manner.

[0098] A first space (SP1) may be arranged between adjacent blocking members (150), a plurality of battery cells (100), and a second plate portion (222) in a first direction (X). The first space (SP1) surrounded by adjacent blocking members (150), a plurality of battery cells (100), and a second plate portion (222) in the first direction (X) may be in communication with a venting passage (250). For example, a hole penetrating the second plate portion (222) may be arranged in the second plate portion (222). The first space (SP1) and the venting passage (250) may be in communication with each other through the hole.

[0099] Flames, high-temperature gases or conductive particles emitted from the battery cells (100) forming the first space (SP1) can be discharged to the outside through the venting path (250) instead of moving to the space where other battery cells (100) are arranged.

[0100] The first protrusion (400) may protrude from the second plate portion (222) toward the plurality of battery cells (100). The first protrusion (400) may not contact the plurality of battery cells (100). The first protrusion (400) may be spaced apart from the plurality of battery cells (100) in the third direction (Z).

[0101] The first protrusion (400) may have a first depth (D400). Specifically, the first depth (D400) of the first protrusion (400) may refer to the distance from the lower surface of the second plate portion (222) to the most protruding portion of the first protrusion (400). The blocking member (150) may extend from the first protrusion (400) to the first depth (D400). The first depth (D400) will be described in detail below with reference to FIG. 8.

[0102] The support wall (500) may be disposed between at least a portion of the plurality of battery cells (100). For example, the support wall (500) may be disposed at the center of the battery module (1 in FIG. 2) in the first direction (X). The support wall (500) may penetrate the support body (210) and the cover portion (220) in the third direction (Z). The support wall (500) may extend in the third direction (Z) by penetrating the support body (210) and the cover portion (220). The support wall (500) may be coupled to the support body (210) and the cover portion (220). For example, the support wall (500) may be coupled to the support body (210) and the cover portion (220) using a fastening hole, a screw, or the like.

[0103] The support wall (500) can suppress the support body (210) and the cover part (220) from being deformed due to the pressure within the battery module (1 in FIG. 1). For example, even if the pressure within the battery module (1 in FIG. 1) increases due to flames, high-temperature gases, or particles ejected from the battery cells (100), the support body (210) and the cover part (220) connected to the support wall (500) can be suppressed from being bent toward the outside of the battery module (1 in FIG. 1). Since the shapes of the support body (210) and the cover part (220) are not deformed, the distance between the blocking member (150) and the support body (210) or the distance between the blocking member (150) and the cover part (220) can be maintained. Accordingly, flames, high-temperature gases, or particles ejected from some battery cells (100) can be suppressed from moving to a space where other battery cells (100) are arranged.

[0104] The support wall (500) can mitigate the risk of the cover portion (220) of the battery module (1 in FIG. 1) whose width is expanded in the first direction (X) being bent in the third direction (Z). For example, as the width of the battery module (1 in FIG. 1) is expanded by stacking a plurality of battery cells (100) in the first direction (X), the risk of the cover portion (220) being bent in the third direction (Z) may increase. The support wall (500) disposed between the plurality of battery cells (100) in the first direction (X) can support the cover portion (220) and suppress the cover portion (220) from being bent in the third direction (Z). In addition, by separating the space between the plurality of battery cells (100) and the cover portion (220), the movement of flames, high-temperature gases, and conductive particles generated in some battery cells (100) can be minimized.

[0105] In Fig. 6, the support wall (500) is illustrated as penetrating the support body (210) and the cover portion (220), but the embodiment is not limited thereto. For example, the support wall (500) may extend from the upper surface of the support body (210) to the lower surface of the cover portion (220) without penetrating the support body (210) and the cover portion (220).

[0106] In the first direction (X), the width (W150) of the blocking member may be smaller than the width (W500) of the support wall. However, the embodiment is not limited thereto. For example, the width (W150) of the blocking member may be larger than the width (W500) of the support wall. In another example, the width (W150) of the blocking member may be equal to the width (W500) of the support wall.

[0107] FIG. 8 is a drawing for explaining a battery module according to one embodiment of the present disclosure.

[0108] Referring to FIG. 8, a busbar frame (310) of a busbar assembly (300 of FIG. 1) of a battery module according to one embodiment of the present disclosure may include a second protrusion (315). The second protrusion (315) may protrude from the busbar (320) toward a plurality of battery cells (100). The second protrusion (315) may include a pair of protrusions. For example, the second protrusion (315) may be formed integrally with the busbar frame (310). In another example, the second protrusion (315) may be provided as a separate member from the busbar frame (310) and coupled to the busbar frame (310). The plurality of second protrusions (315) may be arranged in a first direction (X).

[0109] The blocking member (150) can be placed at least in a portion between the plurality of battery cells (100) in the first direction (X). The blocking member (150) can be placed between the first electrode tabs (120a) in the first direction (X). The blocking member (150) can extend in the second direction (Y).

[0110] The second end (150S2) of the blocking member (150) may protrude further than the second faces (100S2) of the plurality of battery cells. The second end (150S2) of the blocking member (150) may refer to one end of the blocking member (150) facing the bus bar (320). The second faces (100S2) of the plurality of battery cells may refer to one face of the plurality of battery cells (100) facing the bus bar (320). The second end (150S2) of the blocking member (150) may not be disposed on the same plane as the second faces (100S2) of the plurality of battery cells. The second end (150S2) of the blocking member (150) may protrude further than the second faces (100S2) of the plurality of battery cells toward the bus bar (320).

[0111] The blocking member (150) can be inserted into the second protrusion (315). The blocking member (150) can be inserted between a pair of protrusions of the second protrusion (315). At least a portion of the blocking member (150) can be inserted into the second protrusion (315). Specifically, the second end (150S2) of the blocking member (150) can be inserted into the second protrusion (315). The second end (150S2) may not be in contact with the second protrusion (315). The second end (150S2) can be spaced apart from the second protrusion (315) in the second direction (Y).

[0112] A second space (SP2) may be arranged between adjacent blocking members (150), a plurality of battery cells (100), and a busbar plate (310) in a first direction (X). The second space (SP2) surrounded by adjacent blocking members (150), a plurality of battery cells (100), and a busbar plate (310) in the first direction (X) may be in communication with a venting path (250 in FIG. 2). For example, a hole penetrating the second plate portion (222 in FIG. 2) may be arranged in the second plate portion (222). Through the hole, the second space (SP2) and the venting path (250 in FIG. 2) may be in communication.

[0113] Flames, high-temperature gases or conductive particles ejected from the battery cells (100) forming the second space (SP2) can be discharged to the outside through the venting path (250 in FIG. 2) instead of moving to a space where other battery cells (100) are arranged rather than the second space (SP2).

[0114] The second protrusion (315) may have a second depth (D315). Specifically, the second depth (D315) of the second protrusion (315) may refer to the distance from a concave portion of the second protrusion (315) facing the plurality of battery cells (100) to the most protruding portion of the second protrusion (315). The blocking member (150) may extend from the second protrusion (315) to the second depth (D315).

[0115] Referring to FIGS. 7 and 8, the first depth (D400) of the first protrusion (400) and the second depth (D315) of the second protrusion (315) may be different from each other. Specifically, the first depth (D400) of the first protrusion (400) may be smaller than the second depth (D315) of the second protrusion (315). That is, the extent to which the first protrusion (400) protrudes from the cover portion (220) may be smaller than the extent to which the second protrusion (315) protrudes from the bus bar (320). However, the embodiment is not limited thereto. For example, the first depth (D400) of the first protrusion (400) may be greater than or equal to the second depth (D315) of the second protrusion (315).

[0116] FIG. 9 is a drawing illustrating a battery module according to another embodiment of the present disclosure. For convenience of explanation, the description will focus on differences from those described with reference to FIGS. 6 and 7. For reference, FIG. 9 is an enlarged view of portion P of FIG. 6.

[0117] Referring to Fig. 9, the first end (150S1) of the blocking member (150) can be in contact with the cover portion (220). Specifically, the first end (150S1) can extend in the third direction (Z) to be in contact with the second plate portion (222).

[0118] FIG. 10 is a drawing illustrating a battery module according to another embodiment of the present disclosure. For convenience of explanation, the description will focus on differences from those described with reference to FIG. 8.

[0119] Referring to Fig. 10, the second end (150S2) of the blocking member (150) can contact the second protrusion (315). The second end (150S2) can extend in the second direction (Y) to contact the second protrusion (315).

[0120] FIG. 11 is a drawing illustrating a battery module according to another embodiment of the present disclosure. For convenience of explanation, the description will focus on differences from those described with reference to FIG. 8.

[0121] Referring to FIG. 11, a battery module according to another embodiment of the present disclosure may include a sealing member (330). The sealing member (330) may be disposed on the second protrusion (315). The sealing member (330) may be in contact with the blocking member (150) inserted into the second protrusion (315). The sealing member (330) may cover the blocking member (150) inserted into the second protrusion (315). The sealing member (330) may surround the blocking member (150) inserted into the second protrusion (315).

[0122] Some of the aspects of the present disclosure are as follows:

[0123] Aspect 1:

[0124] Multiple battery cells (100);

[0125] A cover portion (220) overlapping at least a portion of the plurality of battery cells (100);

[0126] A blocking member (150) disposed at least between the plurality of battery cells (100) and protruding from the plurality of battery cells (100) toward the cover portion (220);

[0127] A first protrusion (400) protruding from the cover portion (220) toward the plurality of battery cells (100) and including a pair of protrusions; and

[0128] It includes a venting path (250) formed inside the cover part (220),

[0129] The above blocking member (150) is inserted between a pair of protrusions of the first protrusion (400), the battery module (1).

[0130] Second aspect:

[0131] In the first aspect,

[0132] The above plurality of battery cells (100) are stacked in the first direction,

[0133] The above cover portion (220) overlaps the plurality of battery cells (100) in a second direction perpendicular to the first direction,

[0134] The above venting euro (250) is a battery module (1) extending in one of the first direction and a third direction perpendicular to the first direction and the second direction.

[0135] Third aspect: In either the first aspect or the second aspect,

[0136] The first protrusion (400) extends in the third direction, the battery module (1).

[0137] Aspect 4:

[0138] In either the first aspect or the second aspect,

[0139] The above cover part (220) is

[0140] Plate portions (221) spaced apart from each other with the above venting euro (250) in between,

[0141] A battery module (1) including a connecting rib (223) that connects the above plate portion (221) and separates the venting duct (250).

[0142] Aspect 5:

[0143] In the fourth aspect,

[0144] The above plurality of battery cells (100) are stacked in the first direction,

[0145] The above plate portions (221) are spaced apart from each other in a second direction perpendicular to the first direction,

[0146] The battery module (1) wherein the above connecting rib (223) extends in a third direction perpendicular to the first direction and the second direction and overlaps the blocking member (150) in the second direction.

[0147] Aspect 6:

[0148] In either the fourth or fifth aspect,

[0149] A battery module (1) in which the space surrounded by the plurality of battery cells (100), the plate portion (221), and the blocking member (150) is connected to the venting path (250).

[0150] Aspect 7:

[0151] In the first aspect,

[0152] The above blocking member (150) is inserted into the insertion space formed by the first protrusion (400) and comes into contact with the cover part (220).

[0153] The first protrusion (400) is a battery module (1) spaced apart from the plurality of battery cells (100).

[0154] Aspect 8:

[0155] In the first aspect,

[0156] A bus bar (320) arranged on one side of the plurality of battery cells (100) so as to be electrically connected to the plurality of battery cells (100); and

[0157] It further includes a second protrusion (315) protruding from the bus bar (320) toward the plurality of battery cells (100).

[0158] The depth of the first protrusion (400) is different from the depth of the second protrusion (315), the battery module (1).

[0159] Aspect 9:

[0160] In the eighth aspect,

[0161] The above second protrusion (315) includes a pair of protrusions,

[0162] The above plurality of battery cells (100) are stacked in the first direction,

[0163] The above cover portion (220) overlaps the plurality of battery cells (100) in a second direction perpendicular to the first direction,

[0164] A battery module (1), wherein the blocking member (150) is inserted between a pair of protrusions of the second protrusion (315) along the first direction and the third direction perpendicular to the second direction.

[0165] Aspect 10:

[0166] In the eighth aspect,

[0167] A battery module (1) further comprising a sealing portion (330) disposed on the second protrusion (315) and in contact with the blocking member (150).

[0168] Aspect 11:

[0169] In the first aspect,

[0170] The above blocking member (150) is a battery module (1) including a fire-resistant material.

[0171] Aspect 12:

[0172] In the first aspect,

[0173] A support body (210) disposed at the bottom of the plurality of battery cells (100) and spaced apart from the cover part (220) with the plurality of battery cells (100) interposed therebetween; and

[0174] A battery module (1) further comprising a support wall (500) disposed between at least a portion of the plurality of battery cells (100) and extending from the support body (210) to the cover portion (220) to support the cover portion (220).

[0175] Aspect 13:

[0176] In the 12th aspect,

[0177] The above plurality of battery cells (100) are stacked in the first direction,

[0178] A battery module (1) in which, along the first direction, the thickness of the support wall (500) is greater than the thickness of the blocking member (150).

[0179] Aspect 14:

[0180] Multiple battery cells (100);

[0181] A cover portion (220) overlapping at least a portion of the plurality of battery cells (100);

[0182] A bus bar (320) arranged on one side of the plurality of battery cells (100) so as to be electrically connected to the plurality of battery cells (100);

[0183] A blocking member (150) disposed at least between the plurality of battery cells (100) and protruding from the plurality of battery cells (100) toward one of the cover portion (220) and the bus bar (320);

[0184] A venting path (250) formed inside the cover portion (220); and

[0185] A protrusion facing one side of the plurality of battery cells (100) and protruding from one of the cover portion (220) and the bus bar (320) toward the plurality of battery cells (100), and including a pair of protrusions,

[0186] The above blocking member (150) is inserted between the pair of protrusions,

[0187] A battery module (1) in which the space surrounded by the above blocking member (150), the plurality of battery cells (100) and the protrusion is connected to the venting path (250).

[0188] Aspect 15:

[0189] In the 14th aspect,

[0190] A support body (210) disposed at the bottom of the plurality of battery cells (100) and spaced apart from the cover part (220) with the plurality of battery cells (100) interposed therebetween; and

[0191] A battery module (1) further comprising a support wall (500) disposed between at least a portion of the plurality of battery cells (100) and extending from the support body (210) to the cover portion (220) to support the cover portion (220).

[0192] The present disclosure may be implemented in various forms and modifications, and the scope of the present disclosure is not limited to the embodiments described above. Therefore, if a modified embodiment includes elements of the present disclosure, it should be considered to fall within the scope of the present disclosure.

Claims

1. Multiple battery cells; A cover portion overlapping at least a portion of the plurality of battery cells; A blocking member disposed between at least one of the plurality of battery cells and protruding more than the plurality of battery cells toward the cover portion; A first protrusion protruding from the cover portion toward the plurality of battery cells and including a pair of protrusions; and Including a venting path formed inside the above cover portion, A battery module wherein the above blocking member is inserted between a pair of protrusions of the first protrusion.

2. In paragraph 1, The above plurality of battery cells are stacked in the first direction, The above cover portion overlaps the plurality of battery cells in a second direction perpendicular to the first direction, A battery module wherein the venting euro extends in one of the first direction and a third direction perpendicular to the first direction and the second direction.

3. In paragraph 2, The battery module, wherein the first protrusion extends in the third direction.

4. In paragraph 1, The above cover part, Plate sections spaced apart from each other with the above venting euro in between, A battery module comprising a connecting rib that connects the plate portion and separates the venting duct.

5. In paragraph 4, The above plurality of battery cells are stacked in the first direction, The above plate portions are spaced apart from each other in a second direction perpendicular to the first direction, A battery module wherein the connecting rib extends in a third direction perpendicular to the first direction and the second direction and overlaps the blocking member in the second direction.

6. In paragraph 4, A battery module in which a space surrounded by the plurality of battery cells, the plate portion, and the blocking member is connected to the venting path.

7. In paragraph 1, A battery module in which the above blocking member is inserted into the insertion space formed by the first protrusion and comes into contact with the cover portion.

8. In paragraph 1, The battery module, wherein the first protrusion is spaced apart from the plurality of battery cells.

9. In paragraph 1, A bus bar arranged on one side of the plurality of battery cells so as to be electrically connected to the plurality of battery cells; and A battery module further comprising a second protrusion protruding from the bus bar toward the plurality of battery cells.

10. In paragraph 9, A battery module wherein the depth of the first protrusion is different from the depth of the second protrusion.

11. In paragraph 9, The second protrusion includes a pair of projections, The above plurality of battery cells are stacked in the first direction, The above cover portion overlaps the plurality of battery cells in a second direction perpendicular to the first direction, A battery module, wherein the blocking member is inserted between a pair of protrusions of the second protrusion along a third direction perpendicular to the first direction and the second direction.

12. In paragraph 9, A battery module further comprising a sealing portion disposed on the second protrusion and in contact with the blocking member.

13. In paragraph 1, A battery module, wherein the above-mentioned blocking member comprises a fire-resistant material.

14. In paragraph 1, A support body disposed below the plurality of battery cells and spaced apart from the cover part with the plurality of battery cells interposed therebetween; and A battery module further comprising a support wall disposed between at least a portion of the plurality of battery cells and extending from the support body to the cover portion to support the cover portion.

15. In paragraph 14, The above plurality of battery cells are stacked in the first direction, A battery module, wherein, along the first direction, the thickness of the support wall is greater than the thickness of the blocking member.

16. Multiple battery cells; A cover portion overlapping at least a portion of the plurality of battery cells; A bus bar arranged on one side of the plurality of battery cells so as to be electrically connected to the plurality of battery cells; A blocking member disposed between at least one of the plurality of battery cells and protruding beyond the plurality of battery cells toward one of the cover portion and the bus bar; A venting path formed inside the cover portion; and A protrusion facing one side of the plurality of battery cells and protruding from one of the cover portion and the bus bar toward the plurality of battery cells, the protrusion including a pair of protrusions, The above blocking member is inserted between the pair of protrusions, A battery module in which the space surrounded by the above blocking member, the plurality of battery cells and the protrusion is in communication with the venting path.

17. In paragraph 16, A support body disposed below the plurality of battery cells and spaced apart from the cover part with the plurality of battery cells interposed therebetween; and A battery module further comprising a support wall disposed between at least a portion of the plurality of battery cells and extending from the support body to the cover portion to support the cover portion.

Images