Rechargeable battery module, electric vehicle and energy storage system using the same

Abstract

One embodiment of the present invention provides a secondary battery module that can be directly assembled onto a dedicated platform of an electric vehicle in a modular state and is easy to convert into an energy storage system. The secondary battery module of one embodiment includes: a bottom plate that supports a plurality of cells and has mounting holes at both ends in the longitudinal direction; a pair of side plates coupled to both sides in the width direction of the bottom plate; a pair of end plates coupled to the bottom plate and the pair of side plates on both sides in the longitudinal direction; a mounting plate coupled to the bottom plate and the pair of side plates between the pair of end plates and having a through-installation hole through which a mounting member penetrates from the outside to fasten to a platform of an electric vehicle or a rack of an energy storage system; a top cover disposed and coupled on the pair of side plates, the pair of end plates, and the mounting plate; and a final terminal that is finally connected to a busbar connecting the electrode terminals of the cells.

Description

Technology Field

[0001] The present invention relates to a secondary battery module, and more specifically, to a secondary battery module that is directly assembled into a dedicated platform of an electric vehicle in a module state. Background Technology

[0002] Unlike primary batteries, rechargeable batteries are batteries that undergo repeated charging and discharging. Small-capacity rechargeable batteries are used in portable small electronic devices such as mobile phones, laptop computers, and camcorders. Large-capacity and high-density rechargeable batteries are used as power sources for driving motors in hybrid and electric vehicles, or for energy storage.

[0003] For example, a secondary battery comprises an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive and negative electrodes, a case housing the electrode assembly, and electrode terminals electrically connected to the electrode assembly. The secondary battery performs charging and discharging operations through the electrochemical reaction of the positive electrode, the negative electrode, and an electrolyte injected into the case. The case may be cylindrical or rectangular, for example, to suit the intended use.

[0004] A secondary battery can be used as a secondary battery module comprising a plurality of unit cell cells connected in series and / or parallel to drive a motor, for example, of a hybrid vehicle, which requires relatively high energy density. For example, to implement a relatively high-output secondary battery module (e.g., an electric vehicle), the secondary battery module is formed by connecting the electrode terminals of a plurality of unit cell cells, provided in a number corresponding to the desired amount of power.

[0005] For example, a secondary battery module is constructed by stacking multiple cells, assembling them along with related components into a housing structure, and then electrically connecting them in series and / or parallel. There are various manufacturing methods for secondary battery modules depending on the cell type and manufacturer, and these modules are further connected in series and / or parallel to form a secondary battery pack.

[0006] Typically, secondary battery modules are manufactured into secondary battery packs and assembled into electric vehicles. Consequently, many ideas are being developed and the structure of secondary battery packs is being improved to facilitate the assembly and disassembly of secondary battery modules. However, because the secondary battery module is located inside the secondary battery pack, the secondary battery pack must be removed from the electric vehicle and then disassembled for assembly and maintenance.

[0007] Therefore, a secondary battery module with a structure that can be easily converted into an energy storage system when the electric vehicle reaches the end of its lifespan (state of health, SOH) of 70~80% is required, as a lot of effort is required in terms of assembly or maintenance of the secondary battery. The problem to be solved

[0008] One embodiment of the present invention provides a secondary battery module that can be directly assembled into a dedicated platform of an electric vehicle in a modular state. Additionally, one embodiment of the present invention provides a secondary battery module that facilitates easy conversion from an electric vehicle to an energy storage system. Furthermore, one embodiment of the present invention provides an electric vehicle and an energy storage system to which the secondary battery module is applied. means of solving the problem

[0009] A secondary battery module according to one embodiment of the present invention comprises: a bottom plate that supports a plurality of cells and has mounting holes at both ends in the longitudinal direction; a pair of side plates coupled to both sides in the width direction of the bottom plate; a pair of end plates coupled to the bottom plate and the pair of side plates at both sides in the longitudinal direction; a mounting plate coupled to the bottom plate and the pair of side plates between the pair of end plates and having a through-installation hole through which a mounting member penetrates from the outside to be fastened to a platform of an electric vehicle or a rack of an energy storage system; a top cover disposed and coupled on the pair of side plates, the pair of end plates, and the mounting plate; and a final terminal that is finally connected to a bus bar connecting the electrode terminals of the cells.

[0010] The above final terminal can be withdrawn to the lower outside of the above bottom plate.

[0011] The bottom plate may include a plate-shaped support portion that supports the plurality of cells, and a buffer portion that forms a buffer space on the outer side of the support portion and is connected to the support portion.

[0012] The bottom plate has a projection protruding in the width direction, and the side plate has a coupling groove that is coupled to the projection. The bottom plate further has a flange portion that surrounds the lower surface of the bottom plate, and the flange portion can be fastened to the bottom plate by a fastening member.

[0013] The above-mentioned final terminal may include a first connecting member connected to the busbar and bent toward the bottom plate, and a second connecting member exposed to the outside of the bottom plate, installed through the bottom plate, and electrically connected to the first connecting member.

[0014] The second connecting member may have a female coupling portion at its inner end, and the first connecting member may have a male coupling portion that is coupled to the female coupling portion and electrically connected.

[0015] The above female joint and the above male joint can be laser welded while joined together.

[0016] The above mounting plate is fixedly coupled by a fastening member that is coupled to a groove formed in the upper surface of the plate of the bottom plate and the lower surface of the mounting plate facing the upper surface, respectively, and can be fastened to a fastening member that penetrates the side plate.

[0017] The above-mentioned mount member can be installed below the platform or to the side of the rack by penetrating the mounting plate and the top cover.

[0018] The above end plate is positioned on the bottom plate at the bottom and is fastened to a fastening member penetrating the side plate, and can be positioned on the outside of the mutually coupled inner member and the outer member.

[0019] The above end plate may be equipped with a vent for discharging gas from an internal space configured with the bottom plate, the pair of side plates, the pair of end plates, and the top cover during a cell event.

[0020] The above vent may include a housing installed on the end plate and forming an outlet in the center, and a cap coupled to the outside of the housing and opened by gas pressure in the internal space.

[0021] A secondary battery module according to one embodiment of the present invention may further include a cooling fluid connection passage installed at both ends of the side plate to be connected to the cooling channel provided in the pair of side plates, and a cooling fluid port connected to the cooling fluid connection passage and installed externally on the bottom plate to supply and discharge a cooling fluid.

[0022] An electric vehicle according to one embodiment of the present invention includes a plurality of secondary battery modules that are raised from below the platform of the electric vehicle and mounted on the platform by mounting members at both ends in the longitudinal direction, and a cooling pipe connecting cooling fluid ports provided below the secondary battery modules.

[0023] An electric vehicle according to one embodiment of the present invention may further include a protection plate that covers the cooling pipe and the plurality of secondary battery modules below the cooling pipe and is mounted on the platform.

[0024] An electric vehicle according to one embodiment of the present invention may be further fastened to the platform by having another mounting member penetrate from below through a through-installation hole provided in the mounting plate of the secondary battery module.

[0025] An energy storage system according to one embodiment of the present invention includes a rack of the energy storage system and a plurality of secondary battery modules that are moved from the side of the rack and mounted on the rack by mounting members at both ends in the longitudinal direction.

[0026] Another mounting member can be further fastened to the rack by penetrating from the side through the through-installation hole provided in the mounting plate of the secondary battery module. Effects of the invention

[0027] In one embodiment, the secondary battery module is provided with a mounting hole in the bottom plate and a through-installation hole in the mounting plate, so it can be directly assembled and mounted to the platform using a mounting member that penetrates the mounting hole and the through-installation hole while raised from below the platform of the electric vehicle. That is, the secondary battery module can be directly assembled and removed from the platform of the electric vehicle in a module state.

[0028] In addition, the secondary battery module of one embodiment is provided with a mounting hole in the bottom plate and a through-installation hole in the mounting plate, so that when it is removed from the electric vehicle after its lifespan has ended and moved from the side of the rack of the energy storage system, it can be directly assembled and mounted to the rack using a mounting member that penetrates the mounting hole and the through-installation hole. That is, the secondary battery module can be removed from the platform of the electric vehicle in a module state and can be directly assembled and removed from the rack of the energy storage system. Brief explanation of the drawing

[0029] FIG. 1 is an exploded perspective view of a secondary battery module according to one embodiment of the present invention. FIG. 2 is a perspective view of the secondary battery module of FIG. 1 assembled. Figure 3 is a partial perspective view of the final terminal disassembled. FIG. 4 is a partial perspective view of the final terminal and end plate assembled. Figure 5 is a partial perspective view of the final terminal seen from below. Fig. 6 is a bottom view of the assembled secondary battery module of Fig. 1. FIG. 7 is a partial perspective view showing the mounting plate portion of the secondary battery module of FIG. 1. Figure 8 is a cross-sectional view taken along line VIII-VIII of Figure 7. FIG. 9 is a partial perspective view showing the end plate portion of the secondary battery module of FIG. 1. Figure 10 is a cross-sectional view taken along the line X-X of Figure 9. FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG. 2. FIG. 12 is a bottom view of an electric vehicle equipped with a secondary battery module according to one embodiment of the present invention. FIG. 13 is a bottom view of FIG. 12 in which cooling fluid ports are formed on the lower side of the secondary battery module. FIG. 14 is a disassembled partial perspective view of a cooling fluid pipe connected to the cooling fluid ports of FIG. 12. FIG. 15 is a partial perspective view of the protection plate installed below the cooling fluid pipe of FIG. 14 before fastening. FIG. 16 is a perspective view of an energy storage system equipped with a secondary battery module according to one embodiment of the present invention. Specific details for implementing the invention

[0030] Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. In the drawings, parts unrelated to the explanation have been omitted to clearly explain the present invention, and the same reference numerals have been used throughout the specification for identical or similar components.

[0031] FIG. 1 is an exploded perspective view of a secondary battery module according to one embodiment of the present invention, FIG. 2 is an assembled perspective view of the secondary battery module of FIG. 1, FIG. 3 is a partially exploded perspective view of the final terminal, and FIG. 4 is a partially assembled perspective view of the final terminal and end plate.

[0032] Referring to FIGS. 1 to 4, a secondary battery module (100) of one embodiment includes a bottom plate (20), a side plate (30), an end plate (40), a mounting plate (50), a top cover (60), and a final terminal (70).

[0033] The bottom plate (20) supports a plurality of cells (80) made of secondary batteries and is provided with mounting holes (21) at both ends in the longitudinal direction (x-axis direction). The bottom plate (20) sets the x-axis length of the secondary battery module (100).

[0034] Since the bottom plate (20) is fastened to the platform (PF, FIG. 12) of the electric vehicle (200) or the rack (310, FIG. 16) of the energy storage system (300) through the mounting hole (21), the secondary battery module (100) is assembled to the platform (PF) or the rack (310).

[0035] Side plates (30) are provided in pairs and are coupled to both sides in the width direction (y-axis direction) of the bottom plate (20). The side plates (30) set the height in the z-axis direction of the secondary battery module (100).

[0036] The end plates (40) are provided in pairs and are positioned on the upper surface of the bottom plate (20) on both sides in the longitudinal direction (x-axis direction) of the bottom plate (20), and are positioned and coupled between the pair of side plates (30). That is, the side plates (30) are coupled to the end plates (40) by fastening members (31).

[0037] The mounting plate (50) is positioned on the upper surface of the bottom plate (20) between a pair of end plates (40) and is positioned and joined between a pair of side plates (30). That is, the side plates (30) are joined to the mounting plate (50) by fastening members (32).

[0038] The mounting plate (50) is provided with a through-installation hole (51) that passes through in the z-axis direction, so that a mounting member (52, see FIG. 8) passes through the outer side of the secondary battery module (100), that is, the lower side of the bottom plate (20), and is fastened to the platform (PF) of the electric vehicle (200) or the rack (310) of the energy storage system (300).

[0039] A mounting plate (50) is provided to prevent sagging of the bottom plate (20) as the length of the secondary battery module (100) increases, and in this embodiment, it is provided at the length center in the x-axis direction. The mounting plate (50) may be provided as one or multiple plates depending on the length of the secondary battery module (100) (not shown).

[0040] The top cover (60) is placed and coupled on a pair of side plates (30), a pair of end plates (40), and a mounting plate (50). The top cover (60) is provided with a through hole (61) corresponding to a through installation hole (51) of the mounting plate (50), thereby enabling the penetration of a mounting member (52).

[0041] FIG. 5 is a partial perspective view of the final terminal seen from below, and FIG. 6 is a bottom view of the secondary battery module of FIG. 1 assembled. Referring to FIG. 3 through 6, the final terminal (70) is finally connected to a bus bar (83) that connects the electrode terminals (81, 82) of the cells (80). The final terminal (70) is pulled out to the lower outside of the bottom plate (20).

[0042] For example, the final terminal (70) includes a first connecting member (71) and a second connecting member (72). The first connecting member (71) is connected to a bus bar (83) and bent downward toward the bottom plate (20). The second connecting member (72) is exposed to the outside of the bottom plate (20) and is installed through the bottom plate (20) to be electrically connected to the first connecting member (71).

[0043] For example, the second connecting member (72) has a female coupling part (721) at its inner end, and the first connecting member (71) has a male coupling part (711) that is coupled to the female coupling part (721) and electrically connected. The female coupling part (721) and the male coupling part (711) can be laser welded together.

[0044] FIG. 7 is a partial perspective view illustrating the mounting plate portion of the secondary battery module of FIG. 1, and FIG. 8 is a cross-sectional view taken along line VIII-VIII of FIG. 7. Referring to FIG. 7 and FIG. 8, the mounting plate (50) is fixed and connected in the vertical direction by a connecting member (54) that is connected to grooves (223, 531) formed on the upper surface and the lower surface facing the upper surface, respectively, of the bottom plate (20). Additionally, the mounting plate (50) is connected to a fastening member (32) that penetrates the side plate (30).

[0045] For example, the bottom plate (20) includes a plate-shaped support (22) that supports a plurality of cells (80), and a buffer (24) that forms a buffer space (23) on the outside of the support (22) and is connected to the support (22).

[0046] Additionally, the support member (22) further comprises a buffer space (222) partitioned by a partition wall (221) extending in the x-axis direction. Accordingly, the bottom plate (20) is formed in a stacked structure of the lowest buffer member (24), buffer space (23), partition wall (221), buffer space (222), and support member (22).

[0047] The buffer section (24) forms a safety zone to protect the electric vehicle (200) from lower impact through the buffer space (23). The buffer section (24) enables cell damage to be minimized at the bottom of the secondary battery module (100) when the structure of the protection plate (120), described later, collapses due to lower impact.

[0048] The bottom plate (20) is provided with a projection (25) that protrudes in the width direction (y-axis direction) and extends in the length direction (x-axis direction), and the side plate (30) is provided with a coupling groove (35) that is coupled to the projection (25), and further provided with a flange portion (36) that surrounds the lower surface of the bottom plate (20). The flange portion (36) is fastened to the bottom plate (20) by a fastening member (37). Accordingly, the side plate (30) is firmly coupled to the bottom plate (20) while surrounding it on both sides in the width direction of the bottom plate (20).

[0049] The mount member (52) is installed on the lower side of the platform (PF) or on the side of the rack (310) by passing through the through-installation hole (51) of the mounting plate (50) and the through-hole (61) of the top cover (60). The mount member (52) is formed as a bolt and screw-coupled to the platform (PF) or rack (310) via the through-installation hole (51) and the through-hole (61), thereby assembling and installing the secondary battery module (100) in the electric vehicle (200) or energy storage system (300).

[0050] At the same time, another mounting member (53) is screwed into a platform (PF) or rack (310) via a mounting hole (21) so that the secondary battery module (100) is assembled and installed in an electric vehicle (100) or energy storage system (300) (see FIG. 13 and FIG. 16).

[0051] FIG. 9 is a partial perspective view showing the end plate portion of the secondary battery module of FIG. 1, FIG. 10 is a cross-sectional view taken along line X-X of FIG. 9, and FIG. 11 is a cross-sectional view taken along line XI-XI of FIG. 2.

[0052] Referring to FIGS. 1, 4, 9 to 11, the end plate (40) is positioned on the bottom plate (20) at the bottom and is fastened to a fastening member (31) penetrating the side plate (30), and is positioned on the outside of the final terminal (70) formed by a mutually coupled first connecting member (71) and a second connecting member (72).

[0053] The end plate (40) is equipped with a vent (41) that discharges gas from the internal space, which is set by the bottom plate (20), a pair of side plates (30), a pair of end plates (40), and a top cover (60) during a cell event.

[0054] The vent (41) includes a housing (42) and a cap (43). The housing (42) is installed through the end plate (40) and has an outlet (421) in the center. The cap (43) is attached to the outside of the housing (42) and opens the outlet (421) by gas pressure in the internal space to quickly discharge gas generated during an event to the outside, thereby preventing secondary accidents.

[0055] Referring again to FIGS. 8 and 9, a pair of side plates (30) are provided with a cooling channel (38) that cools the cells (80) by circulating a cooling fluid. The secondary battery module (100) is provided with a cooling fluid connection passage (39) connected to the cooling channel (38) at both ends of the side plates (30), and further provides a cooling fluid port (391) connected to the cooling fluid connection passage (39).

[0056] The cooling fluid port (391) is installed in the lower direction, i.e., outward, from the bottom plate (20) to supply and discharge cooling fluid. Thus, it facilitates the assembly of the cooling pipe (110) into the cooling fluid port (391).

[0057] In addition, since the assembly direction of the cooling pipe (110) is the z-axis direction rising from the bottom of the electric vehicle (200), the cooling pipe (110) can be easily removed and attached, and any leakage that may occur at the connection part with the cooling fluid port (381) falls downward. That is, the cooling fluid port (391) and the cooling pipe (110) do not affect the cell (80) due to leakage of the cooling fluid.

[0058] FIG. 12 is a bottom view of an electric vehicle equipped with a secondary battery module according to an embodiment of the present invention, FIG. 13 is a bottom view of FIG. 12 in which cooling fluid ports are formed below the secondary battery module, FIG. 14 is a disassembled partial perspective view of a cooling fluid pipe connected to the cooling fluid ports of FIG. 12, and FIG. 15 is a partial perspective view of a protection plate installed below the cooling fluid pipe of FIG. 14 before fastening.

[0059] Referring to FIGS. 12 to 15, an electric vehicle (200) is disclosed having a secondary battery module (100) of one embodiment assembled and mounted thereon. The electric vehicle (200) of one embodiment includes a plurality of secondary battery modules (100) that are raised from below a platform (PF) and mounted on the platform (PF), and a cooling pipe (110).

[0060] The cooling pipe (110) connects the cooling fluid ports (391) provided below the secondary battery module (100) to one another, allowing the cooling fluid to be discharged to one side.

[0061] The electric vehicle (200) further includes a protection plate (120). The protection plate (120) covers the cooling pipe (110) and a plurality of secondary battery modules (100) below the cooling pipe (110) and is mounted to the platform (PF) by a fastening member (121).

[0062] The electric vehicle (200) includes a mounting member (52) that penetrates from below through a through-installation hole (51) provided in the mounting plate (50) of the secondary battery module (100) and is fastened to a platform (PF). The protection plate (120) is mounted on the platform (PF) after the secondary battery module (100) is installed using the mounting member (52).

[0063] Accordingly, the protection plate (120) is located at the bottom of the electric vehicle (200) and protects the connecting bus bar (250) and the cooling pipe (110) that connect the secondary battery modules (100). The protection plate (120) primarily provides protection at the bottom of the electric vehicle (200).

[0064] FIG. 16 is a perspective view of an energy storage system equipped with a secondary battery module according to an embodiment of the present invention. Referring to FIG. 16, an energy storage system (300) is disclosed in which a secondary battery module (100) of an embodiment is assembled and mounted. The energy storage system (300) of an embodiment includes a rack (310) and a plurality of secondary battery modules (100) that are moved and mounted from the side of the rack (310).

[0065] Multiple secondary battery modules (100) can be separated from the platform (PF) and installed in a rack (310) for use when the remaining lifespan (state of health, SOH) of the electric vehicle (200) is 70-80%. The secondary battery modules (100) can be mounted downward on the platform (PF) of the electric vehicle (200), separated downward after use, and moved to the side of the rack (310) of the energy storage system (300) for use.

[0066] Although preferred embodiments of the present invention have been described above, the present invention is not limited thereto and can be implemented with various modifications within the scope of the claims, the description of the invention, and the attached drawings, and it is obvious that such modifications also fall within the scope of the present invention. Explanation of the symbols

[0067] 20: Bottom plate 22: Support part 23: Buffer space 24: Buffer section 25: Protrusion 30: Side plate 21: Mounting hole 31, 32, 37, 121: Fastening member 35: Connecting groove 36: Flange part 38: Cooling channel 39: Cooling fluid connection passage 40: End plate 41: Vent 42: Housing 43: Cap 50: Mounting plate 51: Through mounting hole 52: Mount member 53: Mount member 54: Connecting member 60: Top cover 61: Through hole 70: Final terminal 71, 72: 1st and 2nd connecting members 80: Cell 81, 82: Electrode terminals 83: Busbar 100: Secondary battery module 110: Cooling pipe 120: Protection Plate 200: Electric Vehicle 221: Bulkhead 222: Buffer space 223, 531: Home 250: Connecting busbar 300: Energy Storage System 310: Rack 391: Cooling fluid port 421: Outlet 711: Male connector 721: Female connector PF: Platform

Claims

Claim 1 A secondary battery module comprising: a plurality of cells; a bottom plate supporting the plurality of cells and having mounting holes at both ends in the longitudinal direction; a pair of side plates coupled to both sides in the width direction of the bottom plate; a pair of end plates coupled to the bottom plate and the pair of side plates on both sides in the longitudinal direction; a mounting plate coupled to the bottom plate and the pair of side plates between the pair of end plates and having a through-installation hole through which a mounting member penetrates from the outside to be fastened to a platform of an electric vehicle or a rack of an energy storage system; a top cover coupled to the pair of side plates, the pair of end plates, and the mounting plate; and a final terminal connected to a busbar connecting the electrode terminals of the cells, penetrating the bottom plate and exposed to the lower outside of the bottom plate. Claim 2 In claim 1, the secondary battery module, wherein the final terminal extends from the lower outer side of the bottom plate over the bottom plate. Claim 3 A secondary battery module according to claim 1, wherein the bottom plate comprises a plate-shaped support portion that supports the plurality of cells, and a buffer portion that forms a buffer space on the outer side of the support portion and is connected to the support portion. Claim 4 A secondary battery module comprising: a plurality of cells; a bottom plate supporting the plurality of cells and having mounting holes at both ends in the longitudinal direction; a pair of side plates coupled to both sides in the width direction of the bottom plate; a pair of end plates coupled to the bottom plate and the pair of side plates at both sides in the longitudinal direction; a mounting plate coupled to the bottom plate and the pair of side plates between the pair of end plates and having a through-installation hole through which a mounting member penetrates from the outside to be fastened to a platform of an electric vehicle or a rack of an energy storage system; a top cover coupled to the pair of side plates, the pair of end plates, and the mounting plate; and a final terminal connected to a busbar connecting the electrode terminals of the cells; wherein the bottom plate has a projection protruding in the width direction, the side plate has a coupling groove coupled to the projection, and further comprises a flange portion covering the lower surface of the bottom plate, and the flange portion is fastened to the bottom plate by a fastening member. Claim 5 A secondary battery module according to claim 1, wherein the final terminal comprises a first connecting member connected to the busbar and bent toward the bottom plate, and a second connecting member exposed to the outside of the bottom plate, extending through the bottom plate and electrically connected to the first connecting member. Claim 6 A secondary battery module according to claim 5, wherein the second connecting member has a female coupling portion at an inner end, and the first connecting member has a male coupling portion coupled to the female coupling portion. Claim 7 In claim 6, the female coupling portion and the male coupling portion are laser welded to each other, a secondary battery module. Claim 8 A secondary battery module comprising: a plurality of cells; a bottom plate supporting the plurality of cells and having mounting holes at both ends in the longitudinal direction; a pair of side plates coupled to both sides in the width direction of the bottom plate; a pair of end plates coupled to the bottom plate and the pair of side plates on both sides in the longitudinal direction; a mounting plate coupled to the bottom plate and the pair of side plates between the pair of end plates and having a through-installation hole through which a mounting member penetrates from the outside to be fastened to a platform of an electric vehicle or a rack of an energy storage system; a top cover coupled to the pair of side plates, the pair of end plates, and the mounting plate; and a final terminal connected to a busbar connecting the electrode terminals of the cells; wherein the mounting plate is fixedly coupled by a coupling member that is coupled to a groove formed in the upper surface of the bottom plate and the lower surface of the mounting plate facing the upper surface, respectively, and extends through the side plates. Claim 9 In claim 5, the secondary battery module, wherein the mount member extends through the mounting plate and the top cover and is installed below the platform or to the side of the rack. Claim 10 A secondary battery module according to claim 5, wherein the end plate is disposed on the bottom plate at the bottom and is fastened to a fastening member extending through the side plate and disposed on the outside of an internal member and an external member that are mutually coupled. Claim 11 In claim 10, the secondary battery module comprises an end plate having a vent for discharging gas from an internal space defined by the bottom plate, the pair of side plates, the pair of end plates, and the top cover during a cell event. Claim 12 A secondary battery module according to claim 11, wherein the vent comprises a housing installed on the end plate and forming an outlet at the center, and a cap coupled to the outside of the housing and opening according to the gas pressure of the internal space. Claim 13 A secondary battery module according to claim 1, further comprising: a cooling fluid connection passage installed at both ends of the side plate to be connected to a cooling channel provided in the pair of side plates; and a cooling fluid port connected to the cooling fluid connection passage and installed externally on the bottom plate to supply and discharge a cooling fluid. Claim 14 An electric vehicle comprising: a plurality of secondary battery modules of claim 1, which are provided and rise from below the platform of the electric vehicle and are mounted on the platform by mounting members at both ends in the longitudinal direction; and cooling pipes connecting cooling fluid ports provided below the secondary battery modules. Claim 15 An electric vehicle according to claim 14, further comprising a protection plate mounted on a platform that covers the cooling pipe and the plurality of secondary battery modules below the cooling pipe. Claim 16 An electric vehicle according to claim 14, wherein another mounting member extends downward through a through-installation hole provided in the mounting plate of the secondary battery module and is fastened to the platform. Claim 17 An energy storage system comprising: a rack of an energy storage system; and a plurality of secondary battery modules of claim 1, which are movable from the side of the rack and mounted on the rack by mounting members at both ends in the longitudinal direction. Claim 18 An energy storage system according to claim 17, wherein another mounting member extends from the side through a through-installation hole provided in the mounting plate of the secondary battery module and is further fastened to the rack.

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