Battery assembly

Abstract

The battery assembly of the present disclosure comprises a case, a plurality of battery cells accommodated in an inner space of the case, a barrier member disposed between the plurality of battery cells, and a sealing member surrounding the upper, left, and right ends of the barrier member.

Description

Technology Field

[0001] The present disclosure relates to a secondary battery, and specifically to a battery assembly. Background Technology

[0002] A secondary battery is a rechargeable battery that can be applied to a wide range of mobility devices, including portable electronic devices, automobiles, ships, aircraft, and drones. Secondary batteries can be utilized as battery assemblies in which multiple battery cells are electrically connected to increase battery capacity or output. Depending on the unit, battery assemblies can be classified as battery modules or battery packs.

[0003] Due to the structure of battery assemblies containing multiple battery cells, there is a problem in which heat or gases from a specific battery cell easily propagate to adjacent battery cells. Accordingly, measures to improve the thermal stability of battery assemblies are required. The problem to be solved

[0004] The present disclosure provides a battery assembly with improved thermal stability.

[0005] The present disclosure can be widely applied in green technology fields such as solar power generation and wind power generation. In addition, the present disclosure can be applied to eco-friendly devices, such as electric vehicles and hybrid vehicles, for preventing climate change by suppressing air pollution and greenhouse gas emissions. means of solving the problem

[0006] A battery assembly according to an embodiment comprises a case, a plurality of battery cells accommodated in an inner space of the case, a barrier member disposed between the plurality of battery cells, and a sealing member surrounding the upper, left, and right ends of the barrier member.

[0007] In an embodiment, the sealing member may include a groove into which an end of the barrier member is inserted, and support members connected to the top, left end, and right end of the groove.

[0008] In an embodiment, at least one projection protruding toward the barrier member may be formed on the inner end of the groove facing the barrier member.

[0009] In an embodiment, the groove may include a reinforcing member and an elastic member surrounding the outer end of the reinforcing member.

[0010] In an embodiment, the reinforcing member may include a base frame extending parallel to one of the top, left end, and right end of the barrier member, a front frame extending from the base frame parallel to the front end of the barrier member, and a rear frame extending from the base frame parallel to the rear end of the barrier member.

[0011] In an embodiment, the support member may include an elastic member having a cavity formed therein.

[0012] In an embodiment, the case includes a lower case facing the lower portion of a plurality of battery cells and a sealing member, and an upper case facing the upper portion of a plurality of battery cells and a sealing member, and the upper portion of the support member can be pressed by the upper case.

[0013] In an embodiment, the battery assembly may further include a heat dissipation member applied between the bottom of the barrier member and the top of the bottom case.

[0014] In an embodiment, the upper case may include a receiving groove into which the upper end of the support member is inserted, and a receiving projection protruding downward from the surrounding area of ​​the receiving groove.

[0015] In an embodiment, a plurality of upper vents are formed in the upper case, each corresponding to a plurality of regions partitioned by a sealing member and a barrier member, and gas generated from a battery cell placed in one of the plurality of regions can be discharged through the upper vent corresponding to one of the plurality of upper vents.

[0016] In an embodiment, the battery assembly electrically connects a plurality of battery cells and may further include a busbar assembly facing the left end and the right end of the plurality of battery cells and the sealing member, respectively. One of the left end and the right end of the support member may be pressed by the busbar assembly.

[0017] In an embodiment, the busbar assembly may include a busbar frame comprising a receiving groove into which a side end of a support member is inserted, and a receiving projection protruding in the direction of the side end from a peripheral area of ​​the receiving groove, and a busbar coupled to an outer end of the busbar frame and electrically connected to a cell tab of a plurality of battery cells.

[0018] In an embodiment, a plurality of side vents corresponding to each of a plurality of regions partitioned by a sealing member and a barrier member are formed in the busbar assembly, and gas generated from a battery cell placed in one of the plurality of regions can be discharged through a side vent corresponding to one of the plurality of side vents.

[0019] In an embodiment, the battery assembly may further include a sealing member disposed between the end of the barrier member and the groove of the sealing member.

[0020] In an embodiment, the sealing member may include at least one of urethane, silicone, and epoxy. Effects of the invention

[0021] The present disclosure can provide a battery assembly with improved thermal stability.

[0022] The present disclosure can delay heat propagation from a specific battery cell to an adjacent battery cell.

[0023] The present disclosure can effectively control the discharge path of gas or dust inside a battery assembly.

[0024] The present disclosure can reduce manufacturing costs and simplify the manufacturing process by applying an integrated sealing member. Brief explanation of the drawing

[0025] FIG. 1 is a drawing for explaining a battery assembly according to an embodiment. FIG. 2 is a drawing for explaining the interior of a battery assembly according to an embodiment. FIG. 3 is a drawing for explaining the side end of a barrier member according to an embodiment. FIG. 4 is a drawing for explaining the side end of a barrier member according to another embodiment. FIG. 5 is a drawing for explaining a sealing member according to an embodiment. FIG. 6 is a drawing for explaining a sealing member that is pressurized according to an embodiment. FIG. 7 is a drawing for explaining one cross-section of a battery assembly according to an embodiment. FIG. 8 is a diagram illustrating heat propagation inside a battery assembly according to an embodiment. FIG. 9 is a drawing for explaining another cross-section of a battery assembly according to an embodiment. Specific details for implementing the invention

[0026] 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 concept of the present invention. Embodiments according to the technical concept of the present invention may be implemented in various forms other than those disclosed in this specification or application, and the technical concept of the present invention is not to be interpreted as being limited to the embodiments described in this specification or application.

[0027] FIG. 1 is a drawing for explaining a battery assembly according to an embodiment. FIG. 2 is a drawing for explaining the interior of a battery assembly according to an embodiment. FIG. 2 shows the inner space (100I) of the case (120) of the battery assembly (100) of FIG. 1.

[0028] Referring to FIGS. 1 and 2, a battery assembly (100) according to an embodiment may include a plurality of battery cells (110), a case (120), a barrier member (140), and a sealing member (150). A battery assembly (100) according to an embodiment may be a battery module or a battery pack.

[0029] Referring to FIG. 2, a plurality of battery cells (110) may be stacked and arranged along a unidirectional direction. For example, the unidirectional direction may be the X-axis direction. The battery cells (110) may be secondary batteries capable of repeatedly performing charging and discharging. For example, the battery cells (110) 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, aluminum-ion batteries, etc.

[0030] A battery cell (110) may include an electrode assembly, an outer casing, and a cell tab (115). In an embodiment, the electrode assembly may include an electrolyte, a cathode, and an anode. In one embodiment, the electrode assembly may further include a separator that blocks contact between the cathode and the anode. The outer casing may accommodate the electrode assembly. For example, the outer casing may be implemented in various types, such as a pouch type, a prismatic type, or a cylindrical type. A portion of the cell tab (115) may be accommodated inside the outer casing, and another portion of the cell tab (115) may protrude outside the outer casing. The cell tab (115) may include a positive tab electrically connected to the positive electrode and a negative tab electrically connected to the negative electrode. In an embodiment, the positive tab may protrude in the +Y-axis direction, and the negative tab may protrude in the -Y-axis direction. However, this is merely one embodiment, and the positive tab and the negative tab may protrude in various directions.

[0031] Referring to FIGS. 1 and 2, the case (120) can form an inner space (100I). A plurality of battery cells (110), a barrier member (140), and a sealing member (150) can be accommodated in the inner space (100I) of the case (120).

[0032] In an embodiment, the case (120) may include a lower case (121a), an upper case (121b), a left end case (not shown), a right end case (123a), a front end case (125a), and a rear end case (125b) joined together. In an embodiment, the lower case (121a) to the rear end case (125b) may be manufactured as separate components and joined together by means such as welding or bolts. In an embodiment, two or more of the lower case (121a) to the rear end case (125b) may be manufactured as a single component by means such as die casting.

[0033] In an embodiment, the bottom case (121a) may face the bottom of the plurality of battery cells (110), and the top case (121b) may face the top of the plurality of battery cells (110). For example, the bottom may be an end in the -Z axis direction, and the top may be an end in the +Z axis direction. The left end case may face the left end of the plurality of battery cells (110), and the right end case (123a) may face the right end of the plurality of battery cells (110). For example, the left end may be an end in the -Y axis direction, and the right end may be an end in the +Y axis direction. The front end case (125a) may face the front end of the plurality of battery cells (110), and the rear end case (125b) may face the rear end of the plurality of battery cells (110). For example, the rear end may be an end in the -X axis direction, and the front end may be an end in the +X axis direction. Meanwhile, the X-axis, Y-axis, and Z-axis can be perpendicular to each other.

[0034] A barrier member (140) may be placed between a plurality of battery cells (110). For example, one barrier member (140) may be placed for every one battery cell (110). As another example, one barrier member (140) may be placed for every two battery cells (110). However, this is merely one embodiment, and the arrangement pattern of the barrier member (140) can be varied in many ways.

[0035] In an embodiment, the barrier member (140) may include an insulating member. For example, the insulating member may include at least one of various materials such as mica and aerogel.

[0036] The sealing member (150) may surround at least three ends of the barrier member (140). In an embodiment, the sealing member (150) may surround the top and both ends of the barrier member (140). For example, the both ends may include a left end and a right end. In another embodiment, the sealing member (150) may surround the top, bottom, and both ends of the barrier member (140).

[0037] The sealing member (150) and the barrier member (140) can divide the inner space (100I) into multiple regions. At least one battery cell may be disposed in each of the multiple regions. In this case, the sealing member (150) coupled to the barrier member (140) can prevent gas, dust, or heat generated within one region from propagating to another region. That is, the sealing member (150) of the present disclosure can increase the sealing force between the barrier member (140) and the case (120), thereby suppressing the transfer of material or heat between adjacent regions.

[0038] In an embodiment, the sealing member (150) may include an elastic member. For example, the elastic member may include at least one of various materials such as ACM (Acrylic Rubber), VMQ (Vinyl Methyl Rubber), NBR (Nitrile Butadiene Rubber), CR (Chloroprene Rubber), and EPDM (Ethylene Propylene Terpolymers).

[0039] In one embodiment, the battery assembly (100) may further include a busbar assembly (130). The busbar assembly (130) can electrically connect a plurality of battery cells (110) to each other.

[0040] In an embodiment, the busbar assembly (130) may face the cell tab (115) of each of the plurality of battery cells (110). For example, if the cell tab (115) is formed protruding from the left end and the right end of the battery cell (110), the busbar assembly (130) may be positioned at the left end and the right end of the battery cell (110), respectively. Additionally, the busbar assembly (130) may be electrically connected to the cell tab (115). In an embodiment, the busbar assembly (130) may be coupled to the left end case and the right end case (123a), respectively.

[0041] In an embodiment, the battery assembly (100) may further include a heat dissipation member (170). The heat dissipation member (170) may be applied between the bottom of the barrier member (140) and the top of the bottom case (121a). The heat dissipation member (170) may include a material having thermal conductivity and a material having adhesive properties. In an embodiment, the heat dissipation member (170) may further be applied between the bottom of the battery cell (110) and the top of the bottom case (121a).

[0042] FIG. 3 is a drawing for explaining the side end of a barrier member according to an embodiment. FIG. 4 is a drawing for explaining the side end of a barrier member according to another embodiment. FIG. 3 and FIG. 4 are cross-sectional views according to S3 of FIG. 2.

[0043] Referring to FIGS. 3 and 4, the sealing member (150) may include a groove (151) and a support member (155). The end of the barrier member (140) may be inserted into the groove (151). That is, the sealing member (150) may be coupled with the barrier member (140) through the groove (151). The end of the barrier member (140) may be divided into an upper end (140T), a lower end (140B), a left end (140L), a right end (140R), etc., depending on the direction. The support member (155) may be connected to the upper end, left end, and right end of the groove (151). In an embodiment, referring to FIG. 4, the support member (155) may be connected to the upper end, lower end, left end, and right end of the groove (151). The support member (155) can be in close contact with the upper case (121b) or the busbar assembly (130) to improve the sealing power of the barrier member (140).

[0044] Referring to FIG. 3, the sealing member (150) according to the embodiment may surround three ends of the barrier member (140). The three ends may include an upper end (140T), a left end (140L), and a right end (140R). In this case, the heat dissipation member (170) may be applied between the lower end of the barrier member (140) and the upper end of the lower case (121a).

[0045] Referring to FIG. 4, the sealing member (150) according to the embodiment may surround four ends of the barrier member (140). The four ends may include the top (140T), bottom (140B), left end (140L), and right end (140R) of the barrier member (140). In this case, the heat dissipation member (170) may be applied between the bottom (140B) of the barrier member (140) and the top of the bottom case (121a). Specifically, the heat dissipation member (170) may be applied between the bottom of the sealing member (150) and the top of the bottom case (121a).

[0046] FIG. 5 is a drawing for explaining a sealing member according to an embodiment. FIG. 6 is a drawing for explaining a sealing member that is pressed according to an embodiment.

[0047] Referring to FIGS. 5 and 6, the sealing member (150) according to the embodiment may include a groove (151) and a support (155). Meanwhile, FIGS. 5 and 6 show a cross-section in the XZ plane of the sealing member (150) coupled to the upper end (140T) of the barrier member (140) of FIGS. 3 and 4. This can be similarly applied to a cross-section in the XY plane of the sealing member (150) coupled to the left end (140L) and the right end (140R).

[0048] The barrier member (140) may include a main body portion (141a) and an end portion (141b) connected to each other. The end portion (141b) of the barrier member (140) may be inserted into a groove portion (151) of the sealing member (150). The inner end of the groove portion (151) may face the outer end of the end portion (141b). Here, the outer end may be an upper end, a front end, and a rear end. As a specific example, the groove portion (151) of the sealing member (150) may include a receiving portion facing the upper end of the end portion (141b), and a protrusion extending from the front end (or rear end) of the receiving portion to face the front end (or rear end) of the end portion (141b).

[0049] In an embodiment, at least one projection (152) may be formed on the inner end of the groove (151) of the sealing member (150). The projection (152) may protrude toward the barrier member (140). For example, a projection may be formed on the protrusion of the groove (151). The projection (152) may come into contact with the front or rear end of the barrier member (140). The projection (152) applies high pressure to the barrier member (140) through the contact surface to fix the sealing member (150) to the barrier member (140) and improve the sealing force of the sealing member (150) to prevent the movement of flames, gas, dust, etc.

[0050] In an embodiment, the first protrusion of the groove portion (151) may face the front end of the barrier member (140), and the second protrusion of the groove portion (151) may face the rear end of the barrier member (140). At least one projection formed on the first protrusion may contact the front end of the barrier member (140), and at least one projection formed on the second protrusion may contact the rear end of the barrier member (140). In one embodiment, the projection of the first protrusion and the projection of the second protrusion may be arranged to be at different positions in an axial direction. For example, as shown in FIG. 5, any one of the projections of the first protrusion may be arranged to be at a different position in the Z-axis direction from any one of the projections of the second protrusion. In another embodiment, the projection of the first protrusion and the projection of the second protrusion may be arranged to be at the same position in an axial direction.

[0051] In an embodiment, the groove (151) may include a reinforcing member (153) and an elastic member. The elastic member may surround the outer end of the reinforcing member (153).

[0052] In the embodiment, the reinforcing member (153) may include a material with high rigidity to improve the fixing force of the groove (151). For example, the reinforcing member (153) may include a metal material such as iron or aluminum.

[0053] In an embodiment, the reinforcing member (153) may include a base frame (153a), a rear frame (153b), and a front frame (153c). In an embodiment, the base frame (153a), the rear frame (153b), and the front frame (153c) may be manufactured as a single unit.

[0054] The base frame (153a) may be extended parallel to one of the top, left end, and right end of the barrier member (140). For example, with reference to FIG. 5, the base frame (153a) may be extended parallel to the top of the end (141b) of the barrier member (140). The rear frame (153b) may be extended from the base frame (153a) parallel to the rear end of the barrier member (140). The front frame (153c) may be extended from the base frame (153a) parallel to the front end of the barrier member (140).

[0055] In an embodiment, referring to FIG. 6, an upper case (121b) may be disposed on the upper part of the support member (155). The upper part of the support member (155) may be pressed by the upper case (121b). In this case, the upper part of the support member (155) may be in close contact with the lower part of the upper case (121b).

[0056] In an embodiment, the support member (155) may include an elastic member having a cavity (155c) formed therein. The cavity (155c) can facilitate elastic deformation of the elastic member by pressure of the upper case (121b). In this case, the size of the cavity (155c) may be smaller after pressure compared to before pressure of the upper case (121b).

[0057] In the embodiment, the elastic member of the groove (151) or support (155) may include at least one of various materials such as ACM (Acrylic Rubber), VMQ (Vinyl Methyl Rubber), NBR (Nitrile Butadiene Rubber), CR (Chloroprene Rubber), and EPDM (Ethylene Propylene Terpolymers).

[0058] In an embodiment, the battery assembly may further include a sealing member (160). The sealing member (160) may be disposed between the sealing member (150) and the barrier member (140). As a specific example, the sealing member (160) may be disposed between the groove (151) of the sealing member (150) and the end (141b) of the barrier member (140). In an embodiment, the sealing member (160) may be applied at a location where the upper end of the end (141b) is received within the inner end of the groove (151).

[0059] In an embodiment, the sealing member (160) may include at least one material among urethane, silicone, and epoxy. However, this is only one embodiment, and the sealing member (160) may include various sealant materials.

[0060] FIG. 7 is a drawing for explaining one cross-section of a battery assembly according to an embodiment. FIG. 8 is a drawing for explaining heat propagation inside a battery assembly according to an embodiment. FIG. 7 and FIG. 8 show a part of a cross-section of the XZ plane according to S1 of FIG. 1.

[0061] Referring to FIGS. 7 and 8, a barrier member (140) may be disposed between a plurality of stacked battery cells (110a to 110d). A sealing member (150) may surround the top of the barrier member (140).

[0062] In an embodiment, the barrier member (140) may include a main body portion (141a), an end portion (141b), and a surface pressure pad (143). An end portion (141b) may be connected to the upper end of the main body portion (141a). The end portion (141b) may be inserted into a groove portion (151) of the sealing member (150). A surface pressure pad (143) may be disposed at the front and rear ends of the main body portion (141a). The surface pressure pad (143) can prevent swelling of the battery cells (110a, 110c) by applying surface pressure to the battery cells (110a, 110c) that contact the surface pressure pad (143).

[0063] In an embodiment, the upper case (121b) may face the upper portion of a plurality of battery cells (110a to 110d) and a sealing member (150). The upper case (121b) may press the upper portion of the support portion (155) of the sealing member (150).

[0064] In an embodiment, the upper case (121b) may include a receiving groove and a receiving projection. The receiving groove may be a portion of the upper case (121b) into which the upper end of the support portion of the sealing member (150) is inserted. The receiving projection may be a portion of the upper case (121b) that protrudes downward as a peripheral area of ​​the receiving groove. The receiving projection may prevent the upper end of the support portion (155) seated in the receiving groove from detaching.

[0065] In an embodiment, the barrier member (140) and the sealing member (150) can divide the inner region of the case (120) into a plurality of regions (A1 to A3). At least one battery cell (110a to 110d) can be disposed in each of the plurality of regions (A1 to A3).

[0066] Referring to FIGS. 1 and 7, a plurality of upper vents (121v) may be formed in the upper case (121b). In an embodiment, at least one upper vent (121v) corresponding to each area (A1 to A3) may be formed in the upper case (121b). That is, at least one upper vent (121v) may be formed for each area (A1 to A3). The upper vents (121v) may function as passages for discharging gas, dust, or heat generated from battery cells (110a to 110d) placed in the corresponding areas (A1 to A3).

[0067] In an embodiment, referring to FIGS. 7 and 8, gas, dust, or heat (hereinafter referred to as gas, etc.) may be generated in a first battery cell (110a) placed in a first area (A1) among a plurality of areas (A1 to A3). In this case, the gas, etc. generated in the first battery cell (110a) within the first area (A1) may be discharged through an upper vent (121v) corresponding to the first area (A1) among a plurality of upper vents. At this time, the sealing member (150) can suppress the movement of gas, etc. from the first area (A1) to other areas (A2, A3) by sealing the space between the upper case (121b) and the barrier member (140).

[0068] FIG. 9 is a drawing for explaining another cross-section of a battery assembly according to an embodiment. FIG. 9 shows a part of a cross-section in the XY plane according to S2 of FIG. 1.

[0069] Referring to FIGS. 1 and FIGS. 9, the battery assembly (100) may further include a busbar assembly (130). As shown in FIG. 9, the busbar assembly (130) may be positioned opposite the right end of a plurality of battery cells (110) and a sealing member (150). The right end of the support portion of the sealing member (150) may be pressed by the busbar assembly (130). Likewise, the busbar assembly (130) may be positioned opposite the left end of a plurality of battery cells (110) and a sealing member (150). In this case, the left end of the support portion of the sealing member (150) may be pressed by the busbar assembly (130).

[0070] In an embodiment, the busbar assembly (130) may include a busbar frame (131) and a busbar (135). The busbar frame (131) may include an insulating material, for example, MPPO (Modified polyphenylene oxide) or PP (Polypropylene) series plastic.

[0071] The busbar (135) can be coupled to the outer end of the busbar frame (131). For example, the outer end may be the right end or the left end. The busbar (135) can be electrically connected to the cell tab (115) of the battery cell (110). For example, the busbar (135) may include a conductive material such as copper or aluminum.

[0072] In an embodiment, the busbar assembly (130) may include a weld (133). The weld (133) may electrically connect the busbar (135) and the cell tab (115) to each other. As a specific example, a through hole may be formed in the busbar assembly (130). A cell tab (115) of a battery cell (110) may be inserted into the through hole. The weld (133) may be formed by welding the busbar (135) or the cell tab (115) while the cell tab (115) is inserted into the through hole.

[0073] In an embodiment, the busbar frame (131) may include a receiving groove and a receiving projection. The outer end of the support portion of the sealing member (150) may be inserted into the receiving groove. For example, the outer end may be a right end or a left end. The receiving projection may protrude in a side direction from the periphery of the receiving groove.

[0074] In an embodiment, referring to FIGS. 1 and FIG. 9, a plurality of side vents (130v) may be formed in the busbar assembly (130). The side vents (130v) may correspond to one of a plurality of regions (A4 to A6). The plurality of regions (A4 to A6) may be partitioned by a sealing member (150). That is, at least one side vent (130v) may be formed in each region (A4 to A6).

[0075] In the embodiment, gas generated from a battery cell (110) placed in one of the plurality of regions (A4 to A6) can be discharged through a side vent corresponding to one of the plurality of side vents (130v). In this case, the side vent (130v) can function as a passage for discharging gas, etc. generated from a battery cell (110) placed in the corresponding region (A4 to A6). At this time, the sealing member (150) can suppress the movement of gas, etc. from a specific region to another region by sealing the space between the busbar assembly (130) and the barrier member (140). Explanation of the symbols

[0076] 100: Battery assembly 110: Battery cell 115: Cell tab 120: Case 121a: Bottom case 121b: Top case 121v: Top vent 123a: Right end case 125a: Front end case 125b: Rear case 130: Busbar assembly 130v: Side vent 131: Busbar frame 135: Busbar 133: Weld 140: Barrier absence 141a: Main body 141b: End 143: Surface pressure pad 150: Sealing member 151: Groove 152: Protrusion 153: Reinforcing member 153a: Base frame 153b: Rear frame 153c: Front frame 155: Support 155c: Joint 160: Sealing member 170: Heat dissipation member

Claims

Claim 1 A battery assembly comprising: a case; a plurality of battery cells accommodated in an inner space of the case; a barrier member disposed between the plurality of battery cells; and a sealing member surrounding the upper, left, and right ends of the barrier member; wherein the sealing member comprises: a groove into which an end of the barrier member is inserted; and a support member connected to the upper, left, and right ends of the groove; and wherein the groove comprises a reinforcing member and an elastic member surrounding the outer end of the reinforcing member. Claim 2 delete Claim 3 A battery assembly according to claim 1, wherein at least one projection protruding toward the barrier member is formed on the inner end of the groove portion facing the barrier member. Claim 4 delete Claim 5 A battery assembly according to claim 1, wherein the reinforcing member comprises: a base frame extending parallel to one of the top, left end, and right end of the barrier member; a front frame extending from the base frame parallel to the front end of the barrier member; and a rear frame extending from the base frame parallel to the rear end of the barrier member. Claim 6 In claim 1, the support member comprises an elastic member having a cavity formed therein, forming a battery assembly. Claim 7 A battery assembly according to claim 1, wherein the case comprises a lower case facing the lower end of the plurality of battery cells and the sealing member, and an upper case facing the upper end of the plurality of battery cells and the sealing member, and the upper end of the support member is pressed by the upper case. Claim 8 A battery assembly further comprising, in claim 7, a heat dissipation member applied between the lower end of the barrier member and the upper end of the lower case. Claim 9 In claim 7, the upper case comprises a receiving groove into which the upper end of the support member is inserted, and a receiving projection protruding downward from the surrounding area of ​​the receiving groove, forming a battery assembly. Claim 10 A battery assembly according to claim 7, wherein the upper case has a plurality of upper vents formed corresponding to each of a plurality of regions partitioned by the sealing member and the barrier member, and gas generated from a battery cell placed in one of the plurality of regions is discharged through the upper vent corresponding to one of the plurality of upper vents. Claim 11 A battery assembly according to claim 1, further comprising a busbar assembly that electrically connects the plurality of battery cells and faces the left and right ends of the plurality of battery cells and the sealing member, respectively, wherein one of the left and right ends of the support member is pressed by the busbar assembly. Claim 12 In claim 11, the busbar assembly comprises: a busbar frame including a receiving groove into which a side end of the support member is inserted, and a receiving projection protruding in the direction of the side end in a peripheral area of ​​the receiving groove; and a busbar coupled to an outer end of the busbar frame and electrically connected to a cell tab of the plurality of battery cells; a battery assembly. Claim 13 A battery assembly according to claim 11, wherein the busbar assembly has a plurality of side vents formed corresponding to each of a plurality of regions partitioned by the sealing member and the barrier member, and gas generated from a battery cell disposed in one of the plurality of regions is discharged through the side vent corresponding to one of the plurality of side vents. Claim 14 A battery assembly comprising, in claim 1, a sealing member disposed between the end portion of the barrier member and the groove portion of the sealing member. Claim 15 In claim 14, the above-mentioned sealing member comprises at least one of urethane, silicone, and epoxy, forming a battery assembly.

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