Battery cell assembly and battery pack

Abstract

The disclosed battery cell assembly comprises: a plurality of stacked battery cells; a frame surrounding the plurality of battery cells; and an end plate coupled to the frame. The end plate includes a ceramic coating layer at least partially on an inner surface facing the plurality of battery cells.

Description

Battery cell assembly and battery pack

[0001] The present invention relates to a battery cell assembly and a battery pack, and more specifically, to a battery cell assembly and a battery pack that delay and suppress the spread of thermal events.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2025-0006525 dated January 16, 2025, and all contents disclosed in the document of said Korean patent application are incorporated herein as part of this specification.

[0003]

[0004] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. Secondary batteries are widely used as energy sources for various wireless devices such as handsets, laptops, and cordless vacuum cleaners. Recently, as the manufacturing cost per unit capacity of secondary batteries has decreased dramatically due to improved energy density and economies of scale, and as the driving range of BEVs (battery electric vehicles) has increased to a level equivalent to that of fuel vehicles, the primary use of secondary batteries is shifting from mobile devices to mobility.

[0005] The trend in the technological development of secondary batteries for mobility is the improvement of energy density and safety. The safety of mobility secondary batteries is critical as it is directly linked to the lives of passengers. The safety of secondary batteries can be achieved through mechanical robustness, the reliability of electrical insulation, and the maintenance of insulation between electrode leads in the event of a thermal runaway event.

[0006]

[0007] The first problem that the technical concept of the present disclosure aims to solve is to provide a battery cell assembly that maintains insulation between electrode leads when a thermal event occurs.

[0008] The second problem that the technical concept of the present disclosure aims to solve is to provide a battery pack that maintains insulation between electrode leads when a thermal event occurs.

[0009] However, the technical problems that the present invention aims to solve are not limited to those described above, and other unmentioned problems will be clearly understood by a person skilled in the art from the description of the invention below.

[0010]

[0011] The present disclosure relates to a battery cell assembly, wherein in one embodiment, it comprises: a plurality of stacked battery cells; a frame surrounding the plurality of battery cells; and an end plate coupled to the frame. The end plate comprises at least a partially ceramic coating layer on its inner surface facing the plurality of battery cells.

[0012] In some embodiments, the ceramic coating layer may include at least one of SiO2, Al2O3, ZrO2, YSZ, and Si3N4.

[0013] In some embodiments, a plurality of electrode leads protruding from the plurality of battery cells may be further included. The inner surface of the end plate may face the plurality of electrode leads.

[0014] In some embodiments, a plurality of electrode leads protruding from the plurality of battery cells may be further included. The end plate may include a first ceramic coating layer disposed in the electrode lead corresponding area on the inner surface of the end plate.

[0015] In some embodiments, the end plate may further include a second ceramic coating layer disposed in an electrode lead non-corresponding region on the inner surface of the end plate.

[0016] In some embodiments, the thickness of the first ceramic coating layer and the thickness of the second ceramic coating layer may be different.

[0017] In some embodiments, the thickness of the second ceramic coating layer may be thicker than the thickness of the first ceramic coating layer.

[0018] In some embodiments, at least a portion of the second ceramic coating layer may be disposed between the plurality of electrode leads.

[0019] In some embodiments, the constituent materials of the first ceramic coating layer and the second ceramic coating layer may be different from each other.

[0020] The present disclosure relates to a battery pack, wherein in one embodiment, it comprises: a plurality of battery cell assemblies; a lower case comprising a lower plate on which the battery cell assemblies are disposed and side walls surrounding the lower plate; and an upper case that closes an open upper surface of a receiving space partitioned by the lower plate and the side walls. The plurality of battery cell assemblies comprises a plurality of stacked battery cells; a frame surrounding the plurality of battery cells; and an end plate coupled to the frame. The end plate comprises at least a partially ceramic coating layer on its inner surface facing the plurality of battery cells.

[0021] In some embodiments, the ceramic coating layer may include at least one of SiO2, Al2O3, ZrO2, YSZ, and Si3N4.

[0022] In some embodiments, the plurality of battery cell assemblies may further include a plurality of electrode leads protruding from the plurality of battery cells. The inner surface of the end plate may face the plurality of electrode leads.

[0023] In some embodiments, the plurality of battery cell assemblies may further include a plurality of electrode leads protruding from the plurality of battery cells. The end plate may include a first ceramic coating layer disposed in an electrode lead corresponding area on the inner surface of the end plate.

[0024] In some embodiments, the end plate may further include a second ceramic coating layer disposed in an electrode lead non-corresponding region on the inner surface of the end plate.

[0025] In some embodiments, the thickness of the first ceramic coating layer and the second ceramic coating layer of the end plate may be different.

[0026] In some embodiments, the thickness of the second ceramic coating layer may be thicker than the thickness of the first ceramic coating layer.

[0027] In some embodiments, at least a portion of the second ceramic coating layer may be disposed between the plurality of electrode leads.

[0028] In some embodiments, the constituent materials of the first ceramic coating layer and the second ceramic coating layer may be different from each other.

[0029]

[0030] The battery cell assembly of the present disclosure having the above configuration can maintain insulation even in a high-temperature environment.

[0031] The battery cell assembly of the present disclosure may have structural robustness due to a ceramic coating layer disposed between a plurality of electrode leads.

[0032] The battery pack of the present disclosure can maintain insulation even in high-temperature environments.

[0033] However, the technical effects obtainable through the present disclosure are not limited to those described above, and other unmentioned effects will be clearly understood by a person skilled in the art from the description of the invention below.

[0034]

[0035] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings.

[0036] FIG. 1 is a perspective view of a battery cell assembly according to one embodiment of the present disclosure.

[0037] Figure 2 is an exploded perspective view of the battery cell assembly of Figure 1.

[0038] FIG. 3 is a perspective view of an end plate according to one embodiment of the present disclosure.

[0039] FIG. 4 is a perspective view of an end plate according to one embodiment of the present disclosure.

[0040] Figure 5 is a schematic front view of the end plate of Figure 4 when viewed in the direction of the hollow arrow.

[0041] FIG. 6 is a perspective view of an end plate according to one embodiment of the present disclosure.

[0042] Figure 7 is a schematic front view of the end plate of Figure 6 when viewed in the direction of the hollow arrow.

[0043] FIG. 8 is a schematic front view of the inner surface of an end plate according to one embodiment of the present disclosure.

[0044] FIG. 9 is a schematic plan view showing a first ceramic coating layer, a second ceramic coating layer, and an electrode lead of a battery cell assembly according to one embodiment of the present disclosure.

[0045] FIG. 10 is a plan view of a battery pack according to one embodiment of the present disclosure.

[0046]

[0047] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, and should be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0048] Therefore, it should be understood that the embodiments described in this disclosure and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention, and that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0049] In addition, in describing the present disclosure, if it is determined that a detailed description of related known configurations or functions could obscure the essence of the present invention, such detailed description may be omitted.

[0050]

[0051] The embodiments of the present disclosure are provided to more fully explain the invention to those skilled in the art; therefore, the shapes and sizes of the components in the drawings may be exaggerated, omitted, or schematically depicted for clearer explanation. Accordingly, the size or proportion of each component does not entirely reflect the actual size or proportion.

[0052]

[0053] [First embodiment]

[0054] FIG. 1 is a perspective view of a battery cell assembly according to one embodiment of the present disclosure. FIG. 2 is an exploded perspective view of the battery cell assembly of FIG. 1. FIG. 3 is a perspective view of an end plate according to one embodiment of the present disclosure. FIG. 4 is a perspective view of an end plate according to one embodiment of the present disclosure. FIG. 5 is a schematic front view of the end plate of FIG. 4 when viewed in the direction of the hollow arrow.

[0055] Referring together to FIGS. 1 to 5, a battery cell assembly (100) according to one embodiment of the present disclosure comprises a plurality of stacked battery cells (110), a frame (120) surrounding the plurality of battery cells (110), and an end plate (140) coupled to the frame (120). The end plate (140) comprises at least a partially ceramic coating layer (150) on its inner surface facing the plurality of battery cells (110).

[0056] The battery cell assembly (100) referred to in the present disclosure means a collection of battery cells in which a plurality of battery cells (110) are structurally and electrically connected. Depending on the method of structurally connecting the plurality of battery cells (110), the battery cell assembly (100) may be referred to by various terms such as a battery module, a battery block, or a battery unit.

[0057] Each of the plurality of battery cells (110) may be a lithium-ion battery. Each of the plurality of battery cells (110) includes an electrode assembly, an electrolyte, and a case. Each of the plurality of battery cells (110) may be any one of a cylindrical battery cell, a prismatic battery cell, and a pouch-type battery cell. The electrode assembly of the cylindrical battery cell is embedded in a cylindrical metal can. The electrode assembly of the prismatic battery cell is embedded in a prismatic metal can. The electrode assembly of the pouch-type battery cell is embedded in a pouch case containing an aluminum laminate sheet.

[0058] The electrode assembly may include an anode, a cathode, and a separator interposed between the anode and the cathode. The electrode assembly may be either a jelly-roll type or a stack type. A jelly-roll type electrode assembly may include a wound structure of an anode, a cathode, and a separator interposed between them. A stack type electrode assembly may include a plurality of sequentially stacked anodes, a plurality of cathodes, and a plurality of separators interposed between them.

[0059] In some embodiments, each of the plurality of battery cells may be any one of a lithium-ion battery, a lithium-ion polymer battery, or a lithium-polymer battery.

[0060] Referring to FIG. 2, the busbar frame assembly (130) may include a busbar frame and a busbar. The busbar may be connected to the electrode leads (131) of the battery cell assemblies (100) to electrically connect the battery cell assemblies (100) to each other. The busbar may be placed on the busbar frame. Meanwhile, the busbar plate may be placed adjacent to the electrode leads (131). The electrode leads of the battery cell assemblies (100) may be configured to pass through a slit formed in the busbar plate to be electrically connected to the busbar. The busbar frame and the busbar plate may include an insulating material such as a non-conductive synthetic resin. The busbar may include a conductive material such as metal.

[0061] Each of the plurality of battery cells (110) may include an electrode lead (131). The electrode lead (131) may include a positive lead and a negative lead. The electrode lead (131) may be a positive or negative terminal. Each electrode assembly of the plurality of battery cells (110) may be connected to the positive lead and the negative lead. Each electrode lead (131) of the plurality of battery cells (110) may have a curved shape. Each electrode lead (131) of the plurality of battery cells (110) may come into contact with the electrode lead (131) of an adjacent battery cell (110). The electrode leads (131) in contact with each other may be fixed to each other by welding or the like. The electrode leads (131) of the plurality of battery cells (110) may be aligned in one direction. Due to the contact between the electrode leads (131) of different battery cells (110), the plurality of battery cells (110) may be electrically connected to each other. Multiple battery cells (110) can be connected in series or in parallel.

[0062] In some embodiments, a plurality of battery cells (110) may form a plurality of banks. Each of the plurality of banks may include one or more battery cells (110). One or more battery cells (110) of each of the plurality of banks may be connected in parallel with each other. The plurality of banks may be connected in series with each other. The number of series-connected banks and the number of battery cells (110) included in the plurality of banks may be determined according to the magnitude of the voltage and current to be output from the battery cell assembly (100). The negative leads of one or more battery cells (110) of each of the plurality of banks may be short-circuited with the positive leads of one or more battery cells (110) of a subsequent bank. The negative leads of one or more battery cells (110) of each of the plurality of banks may be welded with the positive leads of one or more battery cells (110) of a subsequent bank. The positive leads of one or more battery cells (110) of each of the multiple banks may be short-circuited with the negative leads of one or more battery cells (110) of the preceding bank. The positive leads of one or more battery cells (110) of each of the multiple banks may be welded with the negative leads of one or more battery cells (110) of the preceding bank.

[0063] Referring to FIG. 2, the end plate (140) can be coupled to a frame (120) surrounding the plurality of battery cells (110) and the frame (120). The frame (120) may include exhaust holes (121). The frame (120) and the end plate (140) can protect the battery cell assembly (100) from external shocks, heat, vibrations, etc. The cell assembly (100) may be mounted on the frame (120). The frame (120) may include a bottom surface, a side connected to the bottom surface, and a top surface connected to the side surfaces. The frame (120) may cover the bottom surface, side surfaces, and top surface of the cell assembly (100) mounted on the frame (120). The top surface of the frame (120) may include a plurality of exhaust holes (121). The plurality of exhaust holes (121) may provide a path for releasing gas generated from the battery cell assembly (100). The end plates (140) can be attached to the frame (120). The end plates (140) can be fixed to the frame (120), for example, by welding. The end plates (140) fixed to the frame (120) can cover the front and rear of the battery cell assembly (100). The end plates (140) attached to the frame (120) can cover the busbar frame assembly (130). The end plates (140) may include any one of aluminum, titanium, magnesium, tantalum, niobium, and alloys thereof.

[0064] Referring to FIG. 3, the inner surface (141) of an end plate (140) according to an exemplary embodiment of the present disclosure may include a side surface (141S), a bottom surface (141B), and a cover surface (141F). The end plate (140) according to an exemplary embodiment of the present disclosure may have a side surface (141S) including a first side surface (141S_1) in a flat shape and a second side surface (141S_2) in a curved shape. The inner surface (141) of a battery cell assembly (100) facing a plurality of battery cells (110) may include at least a ceramic coating layer (150) in part. In some embodiments, the inner surface (141) may include a first side surface (141S_1), a second side surface (141S_2), a bottom surface (141B), and a cover surface (141F).

[0065] In some embodiments, referring to FIG. 3, the inner surface (141) may include a ceramic coating layer (150) on the surface of the inner surface (141), including a first side surface (141S_1), a second side surface (141S_2), a bottom surface (141B), and a cover surface (141F). In some embodiments, the thickness of the ceramic coating layer (150) may be uniform. By including the ceramic coating layer (150) on the inner surface (141), insulation between the plurality of electrode leads (131) can still be maintained even when a thermal event occurs in the battery cell (110).

[0066] In some embodiments, the battery cell assembly (100) further includes a plurality of electrode leads (131) protruding from the plurality of battery cells (110). The inner surface (141) of the end plate (140) may face the plurality of electrode leads (131).

[0067] In some embodiments, the ceramic coating layer (150) may include at least one of SiO2, Al2O3, ZrO2, YSZ, and Si3N4.

[0068] The ceramic coating layer (150) may include a first ceramic coating layer (150_1) and a second ceramic coating layer (Fig. 7, 150_2). In some embodiments, the ceramic coating layer (150) may be formed by a sol-gel coating method, which forms a thin coating layer through a chemical process that converts a liquid solution into a gel. The solution may refer to a colloidal state in which solid particles are dispersed within a liquid (or gas). In some embodiments, the ceramic coating layer (150) may be formed by a physical vapor deposition (PVD) method, which uses plasma to evaporate a solid target at the atomic level and deposits it onto a substrate to form a coating. The ceramic coating layer (150) may include various ceramic materials and is not limited to the embodiments described above. Additionally, the ceramic coating layer (150) may be formed by various coating techniques and is not limited to the embodiments described above.

[0069] Referring to FIG. 4 and FIG. 5 together, the inner surface (141) of the end plate (140) may include an electrode lead corresponding area (141L). The electrode lead corresponding area (141L) refers to an area facing the electrode lead (131) of the busbar frame assembly (130). In some embodiments, the end plate (140) may include a first ceramic coating layer (150_1) disposed in the electrode lead corresponding area (141L) of the inner surface (141) of the end plate (140). In some embodiments, the surface of the electrode lead corresponding area (141L) of the inner surface (141) of the end plate (140) may include the first ceramic coating layer (150_1). In some embodiments, the first ceramic coating layer (150_1) is included only in the electrode lead corresponding area (141L) of the inner surface (141) of the end plate (140), and the other areas are not included in the ceramic coating layer, thereby minimizing the amount of ceramic material used while maintaining insulation between multiple electrode leads (131) in the event of a thermal event.

[0070]

[0071] [2nd and 3rd embodiments]

[0072] FIG. 6 is a perspective view of an end plate according to one embodiment of the present disclosure. FIG. 7 is a schematic front view of the end plate of FIG. 6 when viewed in the direction of the hollow arrow. FIG. 8 is a schematic front view of the inner surface of an end plate according to one embodiment of the present disclosure. FIG. 9 is a schematic plan view showing a first ceramic coating layer, a second ceramic coating layer, and an electrode lead of a battery cell assembly according to one embodiment of the present disclosure. FIG. 6 to 9 may be described together with FIG. 1 to 5, and redundant descriptions may be omitted.

[0073] Referring to FIGS. 6 and FIGS. 7 together, the inner surface (141) of the end plate (140) may include an electrode lead corresponding area (141L) and an electrode lead non-corresponding area (141N). The electrode lead non-corresponding area (141N) may refer to a portion of the inner surface (141) of the end plate (140) that does not face the electrode lead (131). Referring to FIGS. 6 and FIGS. 7, in some embodiments, the electrode lead non-corresponding area (141N) and the electrode lead corresponding area (141L) may be arranged alternately. In some embodiments, the electrode lead non-corresponding area (141N) and the electrode lead corresponding area (141L) may be arranged alternately. In some embodiments, the electrode lead non-corresponding area (141N) and the electrode lead corresponding area (141L) may be arranged in a regular alternating pattern. The electrode lead corresponding region (141L) may include a plurality of electrode lead corresponding regions (141L_1 to 141L_6). The number of electrode lead corresponding regions (141L) may correspond to the number of electrode leads (131). The electrode lead non-corresponding region (141N) may include a plurality of electrode lead corresponding regions (141N_1 to 141N_6). The respective number of electrode lead corresponding regions (141L) and electrode lead non-corresponding regions (141N) may vary and is not limited to the embodiments described above.

[0074] In some embodiments, the end plate (140) may include a first ceramic coating layer (150_1) disposed in an electrode lead corresponding area (141L) of the inner surface (141) of the end plate (140), and may further include a second ceramic coating layer (150_2) disposed in an electrode lead non-corresponding area (141N) of the inner surface (141) of the end plate (140). The first ceramic coating layer (150_1) may be disposed on the surface of the electrode lead corresponding area (141L), and the second ceramic coating layer (150_2) may be disposed on the surface of the electrode lead non-corresponding area (141N).

[0075] In some embodiments, with reference to FIG. 8, the electrode lead non-corresponding region (141N) may surround the electrode lead corresponding region (141L). Accordingly, the region where the second ceramic coating layer (150_2) is placed may surround the region where the first ceramic coating layer (150_1) is placed. In some embodiments, the area of ​​the electrode lead non-corresponding region (141N) may be larger than the area of ​​the electrode lead corresponding region (141L). Accordingly, the region where the second ceramic coating layer (150_2) is placed may be wider than the region where the first ceramic coating layer (150_1) is placed.

[0076] In some embodiments, the thickness of the first ceramic coating layer (150_1) and the second ceramic coating layer (150_2) of the end plate (140) may be different. Referring to FIG. 9, in some embodiments, the thickness of the second ceramic coating layer (150_2) may be thicker than the thickness of the first ceramic coating layer (150_1). The structural robustness of the battery cell assembly (100) can be enhanced by the thickness of the second ceramic coating layer (150_2) being thicker than the thickness of the first ceramic coating layer (150_1) and being placed between the electrode leads (131).

[0077] In some embodiments, at least a portion of the second ceramic coating layer (150_2) may be disposed between the plurality of electrode leads (131). In some embodiments, the constituent materials of the first ceramic coating layer (150_1) and the second ceramic coating layer (150_2) may be different from each other.

[0078]

[0079] [Fourth embodiment]

[0080] FIG. 10 is a plan view of a battery pack according to one embodiment of the present disclosure. FIG. 10 may be described with reference to the drawings described above, and redundant descriptions may be omitted. A battery pack (10) according to an exemplary embodiment of the present disclosure includes a plurality of battery cell assemblies (100), a lower case comprising a lower plate (200) on which the battery cell assemblies (100) are placed and side walls (210) surrounding the lower plate (200), and an upper case that closes an open upper surface of a receiving space partitioned by the lower plate and the side walls. The plurality of battery cell assemblies (100) may include a plurality of stacked battery cells (110), a frame (120) surrounding the plurality of battery cells (110), and an end plate (140) coupled to the frame (120). The end plate (140) may include at least a partially ceramic coating layer (150) on an inner surface (141) facing the plurality of battery cells (110).

[0081] In some embodiments, the battery pack (10) may include a lower plate (200), side walls (210) surrounding the lower plate (200), and a plurality of battery cell assemblies (100) disposed in a receiving space partitioned by the lower plate (200) and the side walls (210). The lower case may include the lower plate (200) and the side walls (210) surrounding the lower plate (200). That is, the lower case may form a receiving space partitioned by the lower plate (200) and the side walls (210).

[0082] In some embodiments, the battery pack (10) may include a battery cell assembly (100) including the end plate (140) of FIGS. 4 to 8.

[0083] In some embodiments, the side walls (210) may include a plurality of side walls (210_1, 210_2, 210_3, 210_4) surrounding the lower plate (200). The plurality of side walls (210_1, 210_2, 210_3, 210_4) may be joined to the lower plate (200). The plurality of side walls (210_1, 210_2, 210_3, 210_4) may be welded to the lower plate (200). Each of the plurality of side walls (210_1, 210_2, 210_3, 210_4) may be perpendicular to the lower plate (200).

[0084] In some embodiments, cross beams (230) may be interposed between a plurality of battery cell assemblies (100). Cross beams (230) may extend in the Y direction. Cross beams (230) may be joined to a lower plate (200) by a method such as welding. Cross beams (230) may be substantially perpendicular to the lower plate (200).

[0085] In some embodiments, the battery pack (10) may further include a center beam (240) that is positioned between the plurality of battery cell assemblies (100) and extends in the first direction. The receiving space of the battery pack (10) may be arranged in a grid by the cross beams (230) and the center beam (240).

[0086] The battery pack (10) may further include electrical components. In some embodiments, the electrical components may be mounted on a lower case.

[0087] In some embodiments, the electrical components may be positioned between the side wall (210) where the exhaust devices (300) are installed and the plurality of battery cell assemblies (100). In some embodiments, the electrical components may include any electronic components necessary to drive the battery pack.

[0088] In some embodiments, the electrical components may include, for example, a battery management system (BMS). The BMS may be configured to perform monitoring, balancing, and control of the battery pack. In some embodiments, monitoring of the battery pack (10) may include measuring the voltage and current of specific nodes within a plurality of battery cell assemblies (100) and measuring the temperature of set locations within the battery pack (10). In some embodiments, the battery pack (10) may include measuring instruments for measuring the voltage, current, and temperature described above.

[0089] Balancing of the battery pack (10) is an operation that reduces the deviation in the voltage state of charge between multiple battery cell assemblies (100). Control of the battery pack (10) includes preventing the occurrence of overcharging, over-discharging, and overcurrent. Through monitoring, balancing, and control, the battery pack (10) can operate under optimal conditions, and accordingly, the shortening of the lifespan of each of the multiple battery cell assemblies (100) can be prevented or reduced.

[0090] The electrical components may further include a PRA (power relay assembly), a safety plug, etc. The PRA may be configured to supply or cut off power from a high-voltage battery to an external load (e.g., a vehicle motor). The PRA can protect a plurality of battery cell assemblies (100) and an external load (e.g., a vehicle motor) by cutting off power supply to the external load (e.g., a vehicle motor) in situations where abnormal voltage, such as a voltage surge, occurs.

[0091] The present invention has been described in more detail above through drawings and embodiments. However, the configurations described in the drawings or embodiments described in this specification are merely one embodiment of the present invention and do not represent all technical concepts of the present invention; therefore, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

Claims

1. Multiple stacked battery cells; A frame surrounding the plurality of battery cells; and Includes an end plate that combines with the above frame; and The above end plate is, A battery cell assembly comprising at least a partially ceramic coating layer on the inner surface facing the plurality of battery cells.

2. In Paragraph 1, The ceramic coating layer above is, A battery cell assembly comprising at least one of SiO2, Al2O3, ZrO2, YSZ and Si3N4.

3. In Paragraph 1, It further includes a plurality of electrode leads protruding from the plurality of battery cells; and The inner surface of the above end plate is, A battery cell assembly characterized by facing the plurality of electrode leads.

4. In Paragraph 1, It further includes a plurality of electrode leads protruding from the plurality of battery cells; and The above end plate is, A battery cell assembly comprising a first ceramic coating layer disposed in an electrode lead corresponding area on the inner surface of the end plate.

5. In Paragraph 4, The above end plate is, A battery cell assembly further comprising a second ceramic coating layer disposed in an electrode lead non-corresponding region on the inner surface of the end plate.

6. In Paragraph 5, A battery cell assembly characterized in that the thickness of the first ceramic coating layer and the thickness of the second ceramic coating layer are different.

7. In Paragraph 5, A battery cell assembly characterized in that the thickness of the second ceramic coating layer is thicker than the thickness of the first ceramic coating layer.

8. In Paragraph 5, A battery cell assembly characterized in that at least a portion of the second ceramic coating layer is disposed between the plurality of electrode leads.

9. In Paragraph 5, A battery cell assembly characterized in that the constituent materials of the first ceramic coating layer and the second ceramic coating layer are different from each other.

10. Multiple battery cell assemblies; A lower case comprising a lower plate on which the plurality of battery cell assemblies are disposed, and side walls surrounding the lower plate; and It includes an upper case that closes the open upper surface of the receiving space partitioned by the lower plate and the side walls, and The above plurality of battery cell assemblies are, Multiple stacked battery cells; A frame surrounding the plurality of battery cells; and Includes an end plate that combines with the above frame; and The above end plate is, A battery pack comprising at least a partially ceramic coating layer on the inner surface facing the plurality of battery cells.

11. In Paragraph 10, The ceramic coating layer above is, A battery pack comprising at least one of SiO2, Al2O3, ZrO2, YSZ and Si3N4.

12. In Paragraph 10, The above plurality of battery cell assemblies are, It further includes a plurality of electrode leads protruding from the plurality of battery cells; and The inner surface of the above end plate is, A battery pack characterized by facing the above-mentioned plurality of electrode leads.

13. In Paragraph 10, The above plurality of battery cell assemblies are, It further includes a plurality of electrode leads protruding from the plurality of battery cells; and The above end plate is, A battery pack comprising a first ceramic coating layer disposed in an electrode lead corresponding area on the inner surface of the end plate.

14. In Paragraph 13, The above end plate is, A battery pack further comprising a second ceramic coating layer disposed in an electrode lead non-corresponding region on the inner surface of the end plate.

15. In Paragraph 14, The above end plate is, A battery pack characterized in that the thicknesses of the first ceramic coating layer and the second ceramic coating layer are different.

16. In Paragraph 14, A battery pack characterized in that the thickness of the second ceramic coating layer is thicker than the thickness of the first ceramic coating layer.

17. In Paragraph 14, A battery pack characterized in that at least a portion of the second ceramic coating layer is disposed between the plurality of electrode leads.

18. In Paragraph 14, A battery pack characterized in that the constituent materials of the first ceramic coating layer and the second ceramic coating layer are different from each other.

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