Battery Assembly

Abstract

A battery assembly is disclosed. A battery assembly according to one embodiment of the present invention may include a frame that provides an internal space and is open at the top; a partition plate located inside the frame that divides the internal space into an upper space and a lower space; battery cells that penetrate the partition plate vertically; and an upper cover that covers the upper space and is coupled to the frame.

Description

【Technical Field】 【0001】 The present invention relates to a battery assembly. 【0002】 This application claims priority based on Korean Patent Application No. 10-2023-0139864 filed on October 18, 2023 and Korean Patent Application No. 10-2024-0070992 filed on May 30, 2024, and all the contents disclosed in the specifications and drawings of the applications are incorporated herein. 【Background Art】 【0003】 The demand for portable electronic products such as notebook PCs (Personal Computers) and smartphones has increased rapidly, and as the commercialization of robots, electric vehicles, etc. has become full-scale, research on high-performance secondary batteries that can be repeatedly charged and discharged has been actively conducted. 【0004】 Currently, commercialized secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, lithium secondary batteries, etc. Among these, lithium secondary batteries have attracted attention because they have almost no memory effect compared to nickel-based secondary batteries, can be freely charged and discharged, have a very low self-discharge rate, and have a high energy density. 【0005】 Such secondary batteries mainly use lithium oxide and carbon materials as the positive electrode active material and the negative electrode active material, respectively. A secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate coated with the positive electrode active material and the negative electrode active material, respectively, are arranged with a separator interposed therebetween, and an exterior material that seals and houses the electrode assembly together with an electrolytic solution, that is, a battery case. 【0006】 Generally, secondary batteries are classified into can-type secondary batteries in which the electrode assembly is built into a metal can and pouch-type secondary batteries in which the electrode assembly is built into a pouch of an aluminum laminate sheet according to the shape of the exterior material. 【0007】 Recently, secondary batteries are widely used not only in small devices such as portable electronic devices, but also in medium and large devices such as electric vehicles and energy storage systems (ESS) for propulsion and energy storage. Multiple such secondary batteries can be electrically connected and housed together inside a module case to form a single battery module. Multiple such battery modules can then be connected to form a single battery pack. 【0008】 Incidentally, when multiple secondary batteries (battery cells) or multiple battery modules are densely packed into a small space, they can become vulnerable to thermal events. In particular, if a thermal event such as thermal runaway occurs in any one battery cell, high-temperature gases, flames, and heat can be generated. If such gases, flames, and heat are transferred to other battery cells contained in the battery module, a chain reaction such as thermal propagation can occur. Such a chain reaction can not only cause accidents such as fire or explosion in that battery module, but can also trigger fires or explosions in other battery modules. 【0009】 Therefore, it is necessary to effectively cool battery cells to suppress thermal events or heat transfer. Furthermore, it is required to improve the performance of the battery module or battery pack by reducing temperature deviations between multiple battery cells. [Overview of the project] [Problems that the invention aims to solve] 【0010】 The present invention aims to solve the aforementioned problems and other problems. 【0011】 One of the objectives of this invention is to provide a structure that can rapidly cool the temperature of a battery assembly. 【0012】 Another objective of the present invention is to provide a structure that reduces temperature deviations between multiple battery cells. 【0013】 Another objective of the present invention is to improve the electrical safety of battery assemblies. 【0014】 Furthermore, the present invention also aims to improve the ease of assembly of battery assemblies. [Means for solving the problem] 【0015】 A battery assembly according to one embodiment of the present invention for achieving the above objectives may include a frame that provides an internal space and is open at the top; a partition plate located inside the frame and dividing the internal space into an upper space and a lower space; battery cells that penetrate the partition plate in the vertical direction; and an upper cover that covers the upper space and is coupled to the frame. 【0016】 Furthermore, the partition plate may be provided with a communication hole that connects the upper space and the lower space. 【0017】 Multiple battery cells are provided, and the communication holes may be located outside the outermost battery cell among the multiple battery cells. 【0018】 It may also include a lower port that is coupled to the frame and communicates with the lower space. 【0019】 It may also include upper ports that are connected to the frame and communicate with the upper space. 【0020】 Furthermore, the system may include a cooling fluid flowing through the internal space, and the flow direction of the cooling fluid flowing through the upper space and the flow direction of the cooling fluid flowing through the lower space may be formed in opposite directions to each other. 【0021】 Further, the partition plate includes a first insertion hole through which the battery cell penetrates, and the battery assembly may further include a first resin layer that seals between the battery cell and the first insertion hole. 【0022】 Also, the first resin layer covers the upper surface of the partition plate and may extend to seal between the partition plate and the frame. 【0023】 Further, the upper cover includes a second insertion hole through which the battery cell penetrates, and the battery assembly may further include a second resin layer that seals between the battery cell and the second insertion hole. 【0024】 Also, the second resin layer covers the upper surface of the upper cover and may extend to seal between the upper cover and the frame. 【0025】 Further, the frame includes a base plate and a peripheral wall protruding upward from the upper surface of the base plate, and the partition plate and the upper cover may be coupled to the peripheral wall. 【0026】 Also, the peripheral wall may include a first coupling portion protruding inward and coupled to the upper cover, and a second coupling portion protruding inward more than the first coupling portion and coupled to the partition plate. 【0027】 Also, the first coupling portion and the second coupling portion may extend along the periphery of the base plate. 【0028】 Further, the upper cover may be configured to have a larger area than the partition plate. 【0029】 Note that an automobile according to one aspect of the present invention includes the battery assembly of the present invention. 【Advantages of the Invention】 【0030】 According to at least any one of the embodiments of the present invention, the cooling efficiency of the battery assembly is improved. 【0031】 According to at least one embodiment of the present invention, the temperature deviation of multiple battery cells is reduced. 【0032】 According to at least one embodiment of the present invention, the electrical safety of the battery assembly is improved. 【0033】 The following drawings accompanying this specification illustrate preferred embodiments of the invention and, together with the detailed description of the invention, serve to further illustrate the technical idea of ​​the invention. Therefore, the invention should not be construed as being limited solely to what is shown in the drawings. [Brief explanation of the drawing] 【0034】 [Figure 1] This figure shows a battery assembly according to one embodiment of the present invention. [Figure 2] Figure 1 is an exploded perspective view of a portion of the battery assembly. [Figure 3] Figure 2 shows the bulkhead plate of the battery assembly. [Figure 4] This is an enlarged view of section E in Figure 3. [Figure 5] This figure shows a portion of the cross-sectional configuration along line AA' in Figure 1. [Figure 6] This figure shows a portion of the cross-sectional configuration along line AA' in Figure 1. [Figure 7] This figure shows a portion of the cross-sectional configuration indicated by line BB' in Figure 1. [Figure 8] This figure shows a portion of the cross-sectional configuration indicated by line BB' in Figure 1. [Figure 9] This figure shows a portion of the cross-sectional configuration indicated by line DD' in Figure 1. [Figure 10] This figure shows a portion of the cross-sectional configuration indicated by line DD' in Figure 1. [Figure 11] This figure shows the upper cover of the battery assembly in Figure 2. [Figure 12] This figure shows a portion of the cross-sectional configuration along line CC' in Figure 1. [Figure 13]This figure shows a portion of the cross-sectional configuration along line CC' in Figure 1. [Figure 14] This figure shows a portion of the cross-sectional configuration along line CC' in Figure 1. [Figure 15] This figure shows a portion of the cross-sectional configuration along line CC' in Figure 1. [Figure 16] This figure shows a portion of the cross-sectional configuration indicated by line DD' in Figure 1. [Figure 17] This figure shows a portion of the cross-sectional configuration indicated by line DD' in Figure 1. [Figure 18] This figure shows the cross-sectional configuration along line CC' in Figure 1. [Modes for carrying out the invention] 【0035】 Preferred embodiments of the present invention will now be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and in the claims should not be interpreted in a manner limited to their ordinary or dictionary meanings, but rather in a manner appropriate to the technical idea of ​​the present invention, in accordance with the principle that the inventor himself may appropriately define the concept of terms in order to best describe the invention. 【0036】 Therefore, the embodiments described herein and the configurations shown in the drawings represent only one of the most preferred embodiments of the present invention and do not represent the entire technical concept of the invention. It should be understood that there are various equivalents and modifications that can be substituted for these at the time of filing this application. 【0037】 Figure 1 is a diagram showing a battery assembly according to one embodiment of the present invention. Figure 2 is an exploded perspective view of some components of the battery assembly in Figure 1. Referring to Figures 1 and 2, the battery assembly according to one embodiment of the present invention may include a frame 100, a partition plate 200, a battery cell 400, and an upper cover 300. 【0038】 The frame 100 may provide internal space. The frame 100 may form the outer shape of the battery assembly. The frame 100 may have an open top. The frame 100 may also have a rectangular parallelepiped shape. 【0039】 The partition plate 200 may be located inside the frame 100. The partition plate 200 may divide the internal space into an upper space US and a lower space LS. 【0040】 The battery cell 400 may be located inside the frame 100. The battery cell 400 may also penetrate the bulkhead plate 200 vertically. In this case, at least a portion of the battery cell 400 may be located in the lower space LS. Furthermore, at least a portion of the battery cell 400 may be located in the upper space US. 【0041】 In this case, the battery cell 400 may be a secondary battery. The battery cell 400 may be cylindrical. However, the shape of the battery cell 400 is not limited to this, and it may be in various shapes such as pouch type or rectangular parallelepiped. 【0042】 Furthermore, multiple battery cells 400 may be provided. Multiple battery cells 400 may form a battery array. Multiple battery cells 400 may be arranged in columns and rows. 【0043】 The upper cover 300 can be joined, fastened, attached, assembled, or fixed to the frame 100. The upper cover 300 can cover the upper space US. The upper cover 300 can be plate-shaped. The upper cover 300 can cover the open portion of the frame 100. 【0044】 According to this configuration of the present invention, the cooling efficiency of the battery assembly is improved. The cooling fluid (see Figure 18) CM can flow through the lower space LS and the upper space US. The cooling fluid CM can also come into direct contact with the battery cells 400. This improves the cooling efficiency of the battery cells 400. 【0045】 Furthermore, according to this configuration of the present invention, the cooling deviation of the multiple battery cells 400 can be reduced. Also, the thermal resistance deviation of the multiple battery cells 400 can be reduced. The cooling fluid CM can flow in the lower space LS and then move to the upper space US. Alternatively, the cooling fluid CM can flow in the upper space US and then move to the lower space LS. The lower part of the battery cell 400 can be cooled in the lower space LS, and the upper part of the battery cell 400 can be cooled in the upper space US. This can reduce the overall temperature deviation of the multiple battery cells 400. The temperature of the multiple battery cells 400 can be uniformly distributed. This improves the performance of the battery assembly. 【0046】 Furthermore, with this configuration of the present invention, the cooling efficiency is improved, which can reduce the power required for the pump circulating the cooling fluid CM. Improved cooling efficiency allows for a reduction in the flow velocity of the cooling fluid CM, thus lowering the pump's output. This improves the overall efficiency of the battery assembly. 【0047】 Figure 3 shows the bulkhead plate 200 of the battery assembly in Figure 2. Figure 4 is an enlarged view of section E in Figure 3. Figures 5 and 6 show a portion of the cross-sectional configuration along the line A-A' in Figure 1. 【0048】 Referring to Figures 3 to 6, the frame 100 of a battery assembly according to one embodiment of the present invention may include a base plate 110 and a peripheral wall 120. The base plate 110 may be rectangular. The peripheral wall 120 may project upward or in the +Z direction from the upper surface of the base plate 110. The peripheral wall 120 may extend along the perimeter of the base plate 110. 【0049】 The partition plate 200 can be bonded, fastened, attached, assembled, or fixed to the inner surface of the peripheral wall 120. The space between the partition plate 200 and the peripheral wall 120 can be sealed. 【0050】 According to this configuration of the present invention, the upper space US and lower space LS of the battery assembly can be separated and sealed. This allows the cooling fluid CM to have a specific flow path. 【0051】 Referring to Figures 3 to 6, the partition plate 200 of the battery assembly according to one embodiment of the present invention may be provided with communication holes 202. The communication holes 202 may penetrate the partition plate 200. The communication holes 202 may connect the upper space US and the lower space LS. Multiple communication holes 202 may be provided. The cooling fluid CM may move from the lower space LS to the upper space US through the communication holes 202. Alternatively, the cooling fluid CM may move from the upper space US to the lower space LS through the communication holes 202. 【0052】 In this case, the cooling fluid CM may be a liquid. The cooling fluid CM may be an electrically insulating liquid. For example, the cooling fluid CM may be an insulating oil. 【0053】 According to this configuration of the present invention, the cooling efficiency of the battery assembly is improved. The cooling fluid CM that flows through the lower space LS and cools the battery cells 400 can move from the communication hole 202 to the upper space US. The cooling fluid CM can then flow through the upper space US and cool the battery cells 400. 【0054】 Referring to Figures 3 to 6, the communication hole 202 of the battery assembly according to one embodiment of the present invention may be located outside the outermost battery cell 400 among the multiple battery cells 400. The multiple battery cells 400 may be densely packed together to form an array. In this case, the communication hole 202 may be located outside the battery array. 【0055】 According to this configuration of the present invention, the cooling efficiency of the battery assembly is improved. Because the communication holes 202 are located outside the outermost battery cell 400, the cooling fluid CM can move to the upper space US after cooling all the battery cells 400 in the lower space LS. Furthermore, the cooling fluid CM that has moved to the upper space US can cool all the battery cells 400 in the upper space US. 【0056】 Referring to Figures 3 to 6, a partition plate 200 of a battery assembly according to one embodiment of the present invention may have first insertion holes 201 through which battery cells 400 pass. Multiple first insertion holes 201 may be provided. The first insertion holes 201 may be formed to correspond one-to-one with the battery cells 400. In addition, communication holes 202 may be located outside the first insertion holes 201. 【0057】 The battery assembly may include a first resin layer 210 that seals the space between the battery cell 400 and the first insertion hole 201. The first resin layer 210 can seal the gap between the periphery of the battery cell 400 and the first insertion hole 201. For example, the first resin layer 210 may be any one of a waterproof adhesive, an oil-repellent adhesive, or a structural adhesive. 【0058】 According to this configuration of the present invention, the upper space US and the lower space LS of the battery assembly can be separated and sealed. This allows the cooling fluid CM to move from the lower space LS to the upper space US only through the communication hole 202. 【0059】 Referring to Figures 3 to 6, the first resin layer 210 of the battery assembly according to one embodiment of the present invention may extend to cover the upper surface of the partition plate 200 and to seal the space between the partition plate 200 and the frame 100. The first resin layer 210 may also seal the space between the partition plate 200 and the peripheral wall 120. 【0060】 The first resin layer 210 may be formed by applying or potting resin R onto the upper surface of the bulkhead plate 200 after the bulkhead plate 200, the frame 100, and the battery cell 400 have been assembled. The first resin layer 210 may be cured after the resin R has been applied or potted. 【0061】 According to this configuration of the present invention, the cooling fluid CM can move from the lower space LS to the upper space US only through the communication hole 202. 【0062】 Referring to Figures 3 to 6, a partition plate 200 of a battery assembly according to one embodiment of the present invention may include projections 203 formed around a communication hole 202. The projections 203 may be formed on the upper surface of the partition plate 200. The projections 203 may extend along the periphery of the communication hole 202. Multiple projections 203 may be provided. Also, the projections 203 may be provided in a one-to-one correspondence with the communication hole 202. When the first resin layer 210 is applied or potted onto the partition plate 200, the projections 203 may prevent the first resin layer 210 from flowing into the communication hole 202. Alternatively, the projections 203 may function as stoppers to limit the flow of the first resin layer 210 when it is in a fluid state after being applied or potted. Also, the thickness of the first resin layer 210 may be formed lower than the height of the projections 203. 【0063】 Figures 7 and 8 show a portion of the cross-sectional configuration along the line B-B' in Figure 1. Referring to Figures 3 to 8, a battery assembly according to one embodiment of the present invention may include a lower port 501. The lower port 501 may be coupled, fastened, attached, assembled or machined to the frame 100. The lower port 501 may communicate with the lower space LS. Cooling fluid CM may be supplied to the battery assembly from the lower port 501. 【0064】 Furthermore, multiple battery cells 400 may be located between the lower port 501 and the communication hole 202. For example, the lower port 501 may be located in front of the peripheral wall 120, and the communication hole 202 may be located behind the peripheral wall 120. This allows the cooling fluid CM to move to the upper space US after cooling all the battery cells 400 in the lower space LS. 【0065】 According to this configuration of the present invention, the battery cell 400 is directly exposed to and can come into contact with the cooling fluid CM. This improves the cooling efficiency of the battery assembly. 【0066】 Figures 9 and 10 show a portion of the cross-sectional configuration along the line D-D' in Figure 1. Referring to Figures 3 to 10, the peripheral wall 120 of a battery assembly according to one embodiment of the present invention may include a second coupling portion 122. The second coupling portion 122 may be formed projecting inward from the peripheral wall 120. The second coupling portion 122 may extend along the periphery of a partition plate 200 or a base plate 110. The partition plate 200 may be coupled, fastened, attached, assembled or fixed to the second coupling portion 122. A first gap G1 may be formed between the partition plate 200 and the second coupling portion 122. A first resin layer 210 may fill the first gap G1. By filling the first gap G1 with the first resin layer 210, the space between the partition plate 200 and the second coupling portion 122 can be sealed. Furthermore, the filling of the first resin layer 210 into the first gap G1 may increase the bonding strength between the partition plate 200 and the second joint 122. 【0067】 Referring to Figures 3 to 10, the base plate 110 of a battery assembly according to one embodiment of the present invention may be provided with a housing groove 111. The housing groove 111 may be formed on the upper surface of the base plate 110. At least a portion of the battery cell 400 may be inserted into the housing groove 111. Multiple housing grooves 111 may be provided. Also, the housing grooves 111 may be provided in a one-to-one correspondence with the battery cell 400. The housing groove 111 can stably support the battery cell 400. 【0068】 Furthermore, the adhesive member 130 can be placed between the battery cell 400 and the housing groove 111. The adhesive member 130 can stably fix the battery cell 400. 【0069】 Referring to Figures 9 and 10, the partition plate 200 of the battery assembly according to one embodiment of the present invention may be provided with fixing grooves 204. The fixing grooves 204 may be formed on the upper surface of the partition plate 200. The fixing grooves 204 may form irregularities on the upper surface of the partition plate 200. The first resin layer 210 may fill the fixing grooves 204. This improves the bonding strength between the first resin layer 210 and the partition plate 200. 【0070】 Figure 11 shows the upper cover 300 of the battery assembly in Figure 2. Figures 12 and 13 show a portion of the cross-sectional configuration along the line C-C' in Figure 1. Figures 14 and 15 show a portion of the cross-sectional configuration along the line C-C' in Figure 1. Figures 16 and 17 show a portion of the cross-sectional configuration along the line D-D' in Figure 1. 【0071】 Referring to Figures 11 to 17, the upper cover 300 of the battery assembly according to one embodiment of the present invention may be coupled, fastened, attached, assembled, or fixed to the inner surface of the peripheral wall 120. Alternatively, the upper cover 300 may be coupled, fastened, attached, assembled, or fixed to the peripheral wall 120. The space between the upper cover 300 and the peripheral wall 120 may be sealed. 【0072】 According to this configuration of the present invention, the upper space US and lower space LS of the battery assembly can be separated and sealed. This allows the cooling fluid CM to have a specific flow path. 【0073】 Referring to Figures 11 to 17, the peripheral wall 120 of a battery assembly according to one embodiment of the present invention may include a first coupling portion 121. The first coupling portion 121 may be formed projecting inward from the peripheral wall 120. The first coupling portion 121 may be located above the second coupling portion 122. The first coupling portion 121 may extend along the perimeter of the partition plate 200 or the base plate 110. The projection depth L2 of the second coupling portion 122 may be formed to be deeper than the projection depth L1 of the first coupling portion 121. 【0074】 The upper cover 300 can be joined, fastened, attached, assembled, or fixed to the first joint 121. The space between the first joint 121 and the upper cover 300 can also be sealed. 【0075】 According to this configuration of the present invention, the ease of assembly of the battery assembly is improved. The upper cover 300 can be connected to the first connecting portion 121 after the partition plate 200 is connected to the second connecting portion 122. Since the second connecting portion 122 protrudes inward from the first connecting portion 121, it may be easier to sequentially connect the partition plate 200 and the upper cover 300 to the frame 100. 【0076】 Referring to Figures 11 to 17, the upper cover 300 of the battery assembly according to one embodiment of the present invention may be configured to have a larger area than the partition plate 200. 【0077】 According to this configuration of the present invention, the ease of assembly of the battery assembly is improved. The upper cover 300 can be connected to the first connecting part 121 after the partition plate 200 is connected to the second connecting part 122. Since the upper cover 300 has a larger area than the partition plate 200, it may be easier to sequentially connect the partition plate 200 and the upper cover 300 to the frame 100. 【0078】 Referring to Figures 11 to 17, the upper cover 300 of a battery assembly according to one embodiment of the present invention may have a second insertion hole 301 through which a battery cell 400 passes. Multiple second insertion holes 301 may be provided. The second insertion holes 301 may be formed to correspond one-to-one with a battery cell 400. 【0079】 The battery assembly may include a second resin layer 310 that seals the space between the battery cell 400 and the second insertion hole 301. The second resin layer 310 can seal the gap between the periphery of the battery cell 400 and the second insertion hole 301. For example, the second resin layer 310 may be any one of a waterproof adhesive, an oil-repellent adhesive, or a structural adhesive. 【0080】 According to this configuration of the present invention, the upper space US and the lower space LS of the battery assembly can be separated and sealed. This prevents the cooling fluid CM from flowing out of the upper space US. 【0081】 Furthermore, this configuration of the present invention improves the electrical safety of the battery cell 400. Busbars, power terminals, sensing terminals, etc., that electrically connect multiple battery cells 400 may be located above the upper cover 300. The second resin layer 310 can block the flow of cooling fluid CM into the busbars, power terminals, sensing terminals, etc. 【0082】 Referring to Figures 11 to 17, the second resin layer 310 of the battery assembly according to one embodiment of the present invention may extend to cover the upper surface of the upper cover 300 and to seal the space between the upper cover 300 and the frame 100. The second resin layer 310 may also seal the space between the upper cover 300 and the peripheral wall 120. 【0083】 The second resin layer 310 may be formed by applying or potting resin R onto the upper surface of the upper cover 300 after the upper cover 300 has been assembled to the frame 100. The second resin layer 310 may be cured after the application or potting of resin R. 【0084】 Furthermore, a second gap G2 may be formed between the upper cover 300 and the first joint 121. The second resin layer 310 can fill the second gap G2. By filling the second gap G2 with the second resin layer 310, the space between the upper cover 300 and the first joint 121 can be sealed. In addition, by filling the second gap G2 with the second resin layer 310, the bonding strength between the upper cover 300 and the first joint 121 may be increased. 【0085】 According to this configuration of the present invention, the upper space US and the lower space LS of the battery assembly can be separated and sealed. This prevents the cooling fluid CM from flowing out of the upper space US. 【0086】 Referring to Figures 11 to 17, a battery assembly according to one embodiment of the present invention may include an upper port 502. The upper port 502 may be coupled, fastened, attached, assembled or fixed to the frame 100. The upper port 502 may communicate with the upper space US. Cooling fluid CM may flow out of the battery assembly through the upper port 502. 【0087】 Furthermore, multiple battery cells 400 may be located between the upper port 502 and the communication hole 202. For example, the upper port 502 may be located in front of the peripheral wall 120, and the communication hole 202 may be located behind the peripheral wall 120. This allows the cooling fluid CM to move to the upper port 502 after cooling all the battery cells 400 in the upper space US. 【0088】 According to this configuration of the present invention, the battery cell 400 is directly exposed to and can come into contact with the cooling fluid CM. This improves the cooling efficiency of the battery assembly. 【0089】 Figure 18 shows a cross-sectional configuration along the line C-C' in Figure 1. Referring to Figure 18, a battery assembly according to one embodiment of the present invention may include a cooling fluid CM. The cooling fluid CM may flow through the internal space. For example, the cooling fluid CM may be supplied to the lower port 501 and flow through the lower space LS. The cooling fluid CM may flow backward or in the -X axis direction within the lower space LS. The cooling fluid CM may move to the upper space US through the communication hole 202. The cooling fluid CM may flow forward or in the +X axis direction in the upper space US. The cooling fluid CM may flow out of the battery assembly from the upper port 502. In this case, the flow direction of the cooling fluid CM in the lower space LS and the flow direction of the cooling fluid CM in the upper space US may be formed in opposite directions. 【0090】 According to this configuration of the present invention, the cooling fluid CM can improve the cooling efficiency of the battery cells 400 by forming a counterflow. Furthermore, the cooling fluid CM can reduce the temperature difference among multiple battery cells 400. 【0091】 Furthermore, the battery assembly according to the present invention may further include a variety of components, such as a BMS (Battery Management System) or busbars, relays, current sensors, and other components known at the time of filing the application of the present invention. 【0092】 An automobile according to the present invention may include the battery assembly according to the present invention as described above. The battery assembly according to the present invention is applicable to automobiles such as electric vehicles or hybrid vehicles. In addition to such a battery assembly, an automobile according to the present invention may further include a variety of other components included in the automobile, such as a vehicle body or motor, control devices such as an ECU (Electronic Control Unit), etc. 【0093】 In this specification, terms indicating direction such as up, down, left, right, front, and back are used, but such terms are merely for explanatory convenience, and it will be obvious to those skilled in the art that they can change depending on the position of the object in question, the position of the observer, etc. 【0094】 Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and it goes without saying that a wide range of modifications and variations are possible within the equivalent scope of the technical idea of ​​the present invention and the following claims by persons with ordinary skill in the art to which the present invention belongs.

Claims

[Claim 1] It provides interior space, with a frame that is open at the top, A partition plate located inside the frame divides the internal space into an upper space and a lower space, The aforementioned bulkhead plate has a battery cell that penetrates it vertically, A battery assembly including an upper cover that covers the upper space and is coupled to the frame. [Claim 2] The battery assembly according to claim 1, wherein the partition plate is provided with a communication hole that connects the upper space and the lower space. [Claim 3] Multiple battery cells are provided, The battery assembly according to claim 2, wherein the communication hole is located outside the outermost battery cell among the plurality of battery cells. [Claim 4] The battery assembly according to claim 2, further comprising a lower port coupled to the frame and communicating with the lower space. [Claim 5] The battery assembly according to claim 4, further comprising an upper port connected to the frame and communicating with the upper space. [Claim 6] The aforementioned internal space further includes a cooling fluid flowing through it, The battery assembly according to claim 4 or 5, wherein the flow direction of the cooling fluid flowing in the upper space and the flow direction of the cooling fluid flowing in the lower space are formed in opposite directions to each other. [Claim 7] The partition plate is provided with a first insertion hole through which the battery cell passes, The battery assembly according to any one of claims 1 to 5, further comprising a first resin layer sealing the space between the battery cell and the first insertion hole. [Claim 8] The battery assembly according to claim 7, wherein the first resin layer covers the upper surface of the partition plate and extends to seal the space between the partition plate and the frame. [Claim 9] The upper cover is provided with a second insertion hole through which the battery cell passes, The battery assembly according to any one of claims 1 to 5, further comprising a second resin layer sealing the space between the battery cell and the second insertion hole. [Claim 10] The battery assembly according to claim 9, wherein the second resin layer covers the upper surface of the upper cover and extends to seal the space between the upper cover and the frame. [Claim 11] The frame includes a base plate and a peripheral wall protruding upward from the upper surface of the base plate. The battery assembly according to any one of claims 1 to 5, wherein the partition plate and the upper cover are coupled to the peripheral wall. [Claim 12] The aforementioned peripheral wall is A first connecting portion that protrudes inward and is connected to the upper cover, The battery assembly according to claim 11, further comprising a second coupling portion that protrudes inward from the first coupling portion and is coupled to the partition plate. [Claim 13] The battery assembly according to claim 12, wherein the first and second coupling portions extend along the periphery of the base plate. [Claim 14] The battery assembly according to any one of claims 1 to 5, wherein the upper cover is configured to have a larger area than the partition plate. [Claim 15] An automobile comprising the battery assembly according to any one of claims 1 to 5.

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