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; barrier members disposed between the plurality of battery cells; and sealing members surrounding the upper ends and left and right ends of the barrier members, and thus the battery assembly has improved thermal stability and can delay heat propagation to adjacent battery cells.

Description

Battery assembly

[0001] The present disclosure relates to a secondary battery, and more particularly to a battery assembly.

[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 the unit.

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

[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. Furthermore, the present disclosure can be applied to eco-friendly devices such as electric vehicles and hybrid vehicles, which aim to prevent climate change by suppressing air pollution and greenhouse gas emissions.

[0006] A battery assembly according to an embodiment includes a case, a plurality of battery cells accommodated in an inner space of the case, a barrier member arranged between the plurality of battery cells, and a sealing member surrounding the upper end, left end, and right end 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 a support member connected to the upper end, left end, and right end of the groove.

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

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

[0010] In an embodiment, the reinforcing member may include a base frame extending parallel to one of the upper, left, and right ends of the barrier member, a shear 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 side of the plurality of battery cells and the sealing member, and an upper case facing the upper side of the plurality of battery cells and the sealing member, and the upper side of the support portion can be pressed by the upper case.

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

[0014] In an embodiment, the upper case may include a receiving groove into which the upper end of the support is inserted, and a receiving projection protruding downward from a peripheral 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 a gas generated from a battery cell arranged in one of the plurality of regions can be discharged through an upper vent corresponding to one of the plurality of upper vents.

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

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

[0018] In an embodiment, a plurality of side vents are formed in the busbar assembly, each corresponding to a plurality of regions partitioned by a sealing member and a barrier member, and a gas generated from a battery cell arranged 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 portion of the barrier member and the groove portion of the sealing member.

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

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

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

[0023] The present disclosure can effectively control the emission 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.

[0025] Figure 1 is a drawing for explaining a battery assembly according to an embodiment.

[0026] Figure 2 is a drawing for explaining the interior of a battery assembly according to an embodiment.

[0027] Figure 3 is a drawing for explaining the side edge of a barrier member according to an embodiment.

[0028] FIG. 4 is a drawing for explaining the side edge of a barrier member according to another embodiment.

[0029] Figure 5 is a drawing for explaining a sealing member according to an embodiment.

[0030] Figure 6 is a drawing for explaining a pressurized sealing member according to an embodiment.

[0031] FIG. 7 is a drawing for explaining a cross-section of a battery assembly according to an embodiment.

[0032] Figure 8 is a drawing for explaining heat transfer inside a battery assembly according to an embodiment.

[0033] FIG. 9 is a drawing for explaining another cross-section of a battery assembly according to an embodiment.

[0034] 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.

[0035] 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.

[0036] 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). The battery assembly (100) according to an embodiment may be a battery module or a battery pack.

[0037] Referring to FIG. 2, a plurality of battery cells (110) may be stacked and arranged along one direction. For example, the one direction may be the X-axis direction. The battery cells (110) may be secondary batteries that can repeatedly perform 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, and aluminum ion batteries.

[0038] The battery cell (110) may include an electrode assembly, an outer case, 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 case may accommodate the electrode assembly. For example, the outer case may be implemented in various types, such as a pouch type, a square type, a cylindrical type, etc. A part of the cell tab (115) may be accommodated inside the outer case, and another part of the cell tab (115) may protrude to the outside of the outer case. The cell tab (115) may include a cathode tab electrically connected to the cathode, and a cathode tab electrically connected to the anode. In an embodiment, the cathode tab may protrude in the +Y-axis direction, and the cathode tab may protrude in the -Y-axis direction. However, this is only one embodiment, and the positive and negative tabs may protrude in various directions.

[0039] 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).

[0040] 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 case (125a), and a rear case (125b) that are coupled to each other. In an embodiment, the lower case (121a) to the rear case (125b) may be manufactured as separate parts and coupled to each other by welding, bolts, or the like. In an embodiment, two or more of the lower cases (121a) to the rear cases (125b) may be manufactured as an integral part by a method such as die casting.

[0041] In an embodiment, the lower case (121a) may face the lower ends of the plurality of battery cells (110), and the upper case (121b) may face the upper ends of the plurality of battery cells (110). For example, the lower end may be an end in the -Z-axis direction, and the upper end may be an end in the +Z-axis direction. The left-end case may face the left ends of the plurality of battery cells (110), and the right-end case (123a) may face the right ends 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 ends of the plurality of battery cells (110), and the rear-end case (125b) may face the rear ends 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.

[0042] The barrier member (140) may be placed between a plurality of battery cells (110). For example, one barrier member (140) may be placed for each battery cell (110). For another example, one barrier member (140) may be placed for each two battery cells (110). However, this is only one embodiment, and the arrangement pattern of the barrier members (140) may be modified in various ways.

[0043] 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.

[0044] 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 upper and both ends of the barrier member (140). For example, the both ends may include the left end and the right end. In another embodiment, the sealing member (150) may surround the upper, lower, and both ends of the barrier member (140).

[0045] The sealing member (150) and the barrier member (140) can partition the inner space (100I) into a plurality of regions. At least one battery cell can be arranged in each of the plurality of 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 spreading 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 inhibiting the transfer of materials or heat between adjacent regions.

[0046] 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).

[0047] In one embodiment, the battery assembly (100) may further include a busbar assembly (130). The busbar assembly (130) may electrically connect a plurality of battery cells (110) to each other.

[0048] In an embodiment, the busbar assembly (130) may face the cell tabs (115) of each of the plurality of battery cells (110). For example, when the cell tabs (115) are formed to protrude at the left and right ends of the battery cells (110), the busbar assembly (130) may be disposed at the left and right ends of the battery cells (110), respectively. In addition, the busbar assembly (130) may be electrically connected to the cell tabs (115). In an embodiment, the busbar assembly (130) may be coupled to each of the left and right end cases (123a).

[0049] 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 lower end of the barrier member (140) and the upper end of the lower case (121a). The heat dissipation member (170) may include a material having thermal conductivity and a material having adhesiveness. In an embodiment, the heat dissipation member (170) may further be applied between the lower end of the battery cell (110) and the upper end of the lower case (121a).

[0050] Fig. 3 is a drawing for explaining a side end of a barrier member according to an embodiment. Fig. 4 is a drawing for explaining a side end of a barrier member according to another embodiment. Figs. 3 and 4 are cross-sectional views taken along S3 of Fig. 2.

[0051] Referring to FIGS. 3 and 4, the sealing member (150) may include a groove (151) and a support member (155). The groove (151) may be inserted into an end of the barrier member (140). That is, the sealing member (150) may be coupled to 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, the left end, and the right end of the groove (151). In an embodiment, referring to FIG. 4, the support member (155) may be connected to the upper end, the lower end, the left end, and the right end of the groove (151). The support member (155) can be in close contact with the upper case (121b) or the bus bar assembly (130) to improve the sealing force of the barrier member (140).

[0052] Referring to FIG. 3, a sealing member (150) according to an embodiment may surround three ends of a barrier member (140). The three ends may include an upper end (140T), a left end (140L), and a right end (140R). In this case, a 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).

[0053] Referring to FIG. 4, the sealing member (150) according to the embodiment can surround four ends of the barrier member (140). The four ends can include the upper end (140T), the lower end (140B), the left end (140L), and the right end (140R) of the barrier member (140). In this case, the heat dissipation member (170) can be applied between the lower end (140B) of the barrier member (140) and the upper end of the lower case (121a). Specifically, the heat dissipation member (170) can be applied between the lower end of the sealing member (150) and the upper end of the lower case (121a).

[0054] Fig. 5 is a drawing for explaining a sealing member according to an embodiment. Fig. 6 is a drawing for explaining a pressurized sealing member according to an embodiment.

[0055] Referring to FIGS. 5 and 6, the sealing member (150) according to the embodiment may include a groove (151) and a support member (155). Meanwhile, FIGS. 5 and 6 illustrate cross-sections of the XZ plane for the sealing member (150) coupled to the upper end (140T) of the barrier member (140) of FIGS. 3 and 4. This can be equally applied to cross-sections of the XY plane for the sealing member (150) coupled to the left end (140L) and the right end (140R).

[0056] The barrier member (140) may include a main body (141a) and an end portion (141b) that are connected to each other. The end portion (141b) of the barrier member (140) may be inserted into a groove portion (151) of a 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. For 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).

[0057] In an embodiment, at least one protrusion (152) may be formed on the inner end of the groove portion (151) of the sealing member (150). The protrusion (152) may protrude toward the barrier member (140). For example, the protrusion may be formed on the protrusion portion of the groove portion (151). The protrusion (152) may contact the front or rear end of the barrier member (140). The protrusion (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 improves the sealing force of the sealing member (150), thereby preventing the movement of flames, gases, dust, etc.

[0058] In an embodiment, the first protrusion of the groove (151) may face the front end of the barrier member (140), and the second protrusion of the groove (151) may face the rear end of the barrier member (140). At least one protrusion formed on the first protrusion may contact the front end of the barrier member (140), and at least one protrusion formed on the second protrusion may contact the rear end of the barrier member (140). In one embodiment, the protrusion of the first protrusion and the protrusion of the second protrusion may be arranged to have different positions in one axial direction. For example, as shown in FIG. 5, one protrusion of the first protrusion may be arranged at a different position in the Z-axis direction from one protrusion of the second protrusion. In another embodiment, the protrusion of the first protrusion and the protrusion of the second protrusion may be arranged to have the same position in one axial direction.

[0059] In an embodiment, the home portion (151) may include a reinforcing member (153) and an elastic member. The elastic member may surround the outer end of the reinforcing member (153).

[0060] In an embodiment, the reinforcing member (153) may include a material having 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.

[0061] In an embodiment, the reinforcing member (153) may include a base frame (153a), a rear frame (153b), and a shear frame (153c). In an embodiment, the base frame (153a), the rear frame (153b), and the shear frame (153c) may be manufactured as an integral member.

[0062] The base frame (153a) may extend parallel to one of the upper end, left end, and right end of the barrier member (140). For example, referring to FIG. 5, the base frame (153a) may extend parallel to the upper end of the end (141b) of the barrier member (140). The rear frame (153b) may extend parallel to the rear end of the barrier member (140) from the base frame (153a). The front frame (153c) may extend parallel to the front end of the barrier member (140) from the base frame (153a).

[0063] In an embodiment, referring to FIG. 6, an upper case (121b) may be placed on the upper end of the support member (155). The upper end of the support member (155) may be pressed by the upper case (121b). In this case, the upper end of the support member (155) may be in close contact with the lower end of the upper case (121b).

[0064] In an embodiment, the support member (155) may include an elastic member in which a cavity (155c) is formed. The cavity (155c) may facilitate elastic deformation of the elastic member due to the pressurization of the upper case (121b). In this case, the size of the cavity (155c) may be smaller after the pressurization of the upper case (121b) compared to before the pressurization.

[0065] In an embodiment, the elastic member of the home portion (151) or the support portion (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).

[0066] In an embodiment, the battery assembly may further include a sealing member (160). The sealing member (160) may be positioned between the sealing member (150) and the barrier member (140). For a specific example, the sealing member (160) may be positioned 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 to a position where the upper end of the end (141b) is received among the inner ends of the groove (151).

[0067] In an embodiment, the sealing member (160) may include at least one material selected from the group consisting of urethane, silicone, and epoxy. However, this is merely an embodiment, and the sealing member (160) may include various sealant materials.

[0068] Fig. 7 is a drawing for explaining a cross-section of a battery assembly according to an embodiment. Fig. 8 is a drawing for explaining heat transfer inside a battery assembly according to an embodiment. Figs. 7 and 8 illustrate a part of a cross-section of the XZ plane according to S1 of Fig. 1.

[0069] Referring to FIGS. 7 and 8, a barrier member (140) may be placed between a plurality of stacked battery cells (110a to 110d). A sealing member (150) may surround the upper end of the barrier member (140).

[0070] In an embodiment, the barrier member (140) may include a main body portion (141a), an end portion (141b), and a pressure pad (143). The end portion (141b) may be connected to the upper end of the main body portion (141a). The end portion (141b) may be inserted into the groove portion (151) of the sealing member (150). Pressure pads (143) may be arranged at the front and rear ends of the main body portion (141a). The pressure pads (143) may apply pressure to the battery cells (110a, 110c) that come into contact with the pressure pads (143), thereby preventing swelling of the battery cells (110a, 110c).

[0071] In an embodiment, the upper case (121b) may face the upper end of a plurality of battery cells (110a to 110d) and a sealing member (150). The upper case (121b) may press the upper end of the support portion (155) of the sealing member (150).

[0072] In an embodiment, the upper case (121b) may include a receiving groove and a receiving protrusion. The receiving groove may be a portion into which the upper end of the support portion of the sealing member (150) is inserted in the upper case (121b). The receiving protrusion may be a portion protruding downward as a peripheral area of ​​the receiving groove in the upper case (121b). The receiving protrusion may prevent the upper end of the support portion (155) seated in the receiving groove from being dislodged.

[0073] In an embodiment, the barrier member (140) and the sealing member (150) can divide the inner area of ​​the case (120) into a plurality of areas (A1 to A3). At least one battery cell (110a to 110d) can be arranged in each of the plurality of areas (A1 to A3).

[0074] 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 region (A1 to A3) may be formed in the upper case (121b). That is, at least one upper vent (121v) may be formed in each region (A1 to A3). The upper vents (121v) may function as passages for discharging gas, dust, or heat generated from battery cells (110a to 110d) arranged in the corresponding regions (A1 to A3).

[0075] In an embodiment, referring to FIGS. 7 and 8, gas, dust, heat, etc. (hereinafter, gas, etc.) may be generated from a first battery cell (110a) disposed in a first region (A1) among a plurality of regions (A1 to A3). In this case, the gas, etc. generated from the first battery cell (110a) in the first region (A1) may be discharged through an upper vent (121v) corresponding to the first region (A1) among the plurality of upper vents. At this time, the sealing member (150) may seal the space between the upper case (121b) and the barrier member (140), thereby suppressing the gas, etc. from moving from the first region (A1) to other regions (A2, A3).

[0076] 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 of the XY plane according to S2 of Fig. 1.

[0077] Referring to FIGS. 1 and 9, the battery assembly (100) may further include a busbar assembly (130). As illustrated in FIG. 9, the busbar assembly (130) may face the right end of the plurality of battery cells (110) and the sealing member (150). The right end of the support portion of the sealing member (150) may be pressed by the busbar assembly (130). Similarly, the busbar assembly (130) may face the left end of the plurality of battery cells (110) and the 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).

[0078] 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 such as, for example, a plastic of the MPPO (Modified polyphenylene oxide) or PP (Polypropylene) series.

[0079] The bus bar (135) may be connected to the outer end of the bus bar frame (131). For example, the outer end may be the right end or the left end. The bus bar (135) may be electrically connected to the cell tab (115) of the battery cell (110). For example, the bus bar (135) may include a conductive material such as copper or aluminum.

[0080] In an embodiment, the busbar assembly (130) may include a welded portion (133). The welded portion (133) may electrically connect the busbar (135) and the cell tab (115) to each other. For a specific example, a through hole may be formed in the busbar assembly (130). The cell tab (115) of the battery cell (110) may be inserted into the through hole. The welded portion (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.

[0081] In an embodiment, the busbar frame (131) may include a receiving groove and a receiving projection. The receiving groove may be inserted into the outer end of the support portion of the sealing member (150). For example, the outer end may be the right end or the left end. The receiving projection may protrude in the lateral direction from the peripheral area of ​​the receiving groove.

[0082] In an embodiment, referring to FIGS. 1 and 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).

[0083] In an embodiment, gas generated from a battery cell (110) disposed in one of a plurality of regions (A4 to A6) may be discharged through a side vent corresponding to one of a plurality of side vents (130v). In this case, the side vent (130v) may function as a passage for discharging gas, etc. generated from a battery cell (110) disposed in the corresponding region (A4 to A6). At this time, the sealing member (150) may seal the space between the busbar assembly (130) and the barrier member (140), thereby suppressing gas, etc. from moving from a specific region to another region.

Claims

1. Case; A plurality of battery cells accommodated in the inner space of the case; A barrier member disposed between the plurality of battery cells; and A battery assembly including a sealing member surrounding the upper, left, and right ends of the above barrier member.

2. In paragraph 1, The above sealing member, A groove into which the end of the above barrier member is inserted; and A battery assembly comprising a support member connected to the upper, left, and right ends of the home portion.

3. In paragraph 2, A battery assembly, wherein at least one protrusion protruding toward the barrier member is formed on the inner end of the groove portion facing the barrier member.

4. In paragraph 2, A battery assembly, wherein the above home portion includes a reinforcing member and an elastic member surrounding an outer end of the reinforcing member.

5. In paragraph 4, The above reinforcing member is, A base frame extending parallel to one of the upper, left, and right ends of the above barrier member; A shear frame extending from the base frame, parallel to the front end of the barrier member; and A battery assembly comprising a rear frame extended from the base frame, parallel to the rear end of the barrier member.

6. In paragraph 2, The above support member is a battery assembly including an elastic member in which a cavity is formed.

7. In paragraph 2, The above case is, It includes a lower case facing the lower side of the plurality of battery cells and the sealing member, and an upper case facing the upper side of the plurality of battery cells and the sealing member, The upper part of the above support is a battery assembly that is pressurized by the upper case.

8. In paragraph 7, A battery assembly further comprising a heat dissipation member applied between the lower end of the barrier member and the upper end of the lower case.

9. In paragraph 7, A battery assembly, wherein the upper case includes a receiving groove into which the upper end of the support portion is inserted, and a receiving projection protruding downward from a peripheral area of ​​the receiving groove.

10. In paragraph 7, In the upper case, a plurality of upper vents are formed corresponding to each of the plurality of areas partitioned by the sealing member and the barrier member. A battery assembly, wherein gas generated from a battery cell arranged in one of the plurality of regions is discharged through an upper vent corresponding to one of the plurality of upper vents.

11. In paragraph 2, Further comprising a bus bar assembly electrically connecting the plurality of battery cells and facing the left and right ends of the plurality of battery cells and the sealing member, respectively; A battery assembly, wherein one of the left and right ends of the above support is pressurized by the busbar assembly.

12. In paragraph 11, The above busbar assembly, A bus bar frame including a receiving groove into which a side end of the support part is inserted, and a receiving projection protruding in the side end direction in a peripheral area of ​​the receiving groove; and A battery assembly comprising a bus bar coupled to the outer end of the bus bar frame and electrically connected to the cell tabs of the plurality of battery cells.

13. In paragraph 11, The above busbar assembly is formed with a plurality of side vents corresponding to each of the plurality of areas partitioned by the sealing member and the barrier member. A battery assembly, wherein gas generated from a battery cell arranged in one of the plurality of regions is discharged through a side vent corresponding to one of the plurality of side vents.

14. In paragraph 2, A battery assembly further comprising a sealing member disposed between an end portion of the barrier member and a groove portion of the sealing member.

15. In paragraph 14, The above sealing member is, A battery assembly comprising at least one of urethane, silicone and epoxy.

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