Energy storage device comprising battery modules

Abstract

The energy storage device according to an embodiment of the present invention comprises: a plurality of battery modules, each comprising a plurality of battery cells; a case for accommodating the plurality of battery modules; and a support frame for supporting the plurality of battery modules within the case, wherein the support frame comprises a lower support part on the top of which at least one battery module is supported, and an upper support part which is disposed above the lower support part, and on the top of which at least one battery module is supported.

Description

Energy storage device including a battery module

[0001] The present invention relates to an energy storage device including a battery module, and more particularly, to an energy storage device having a reduced installation area and ensuring structural rigidity.

[0002] Secondary batteries, unlike primary batteries that cannot be recharged, are batteries that can be charged and discharged. They are used not only in portable devices but also in electric vehicles (EVs) and hybrid electric vehicles (HEVs) that are driven by electrical power sources.

[0003] Currently, widely used types of secondary batteries include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. The operating voltage of these unit secondary battery cells, i.e., unit battery cells, is approximately 2.5 V to 4.6 V. Therefore, when a higher output voltage is required, multiple battery cells are connected in series to form a battery pack. Furthermore, depending on the charge / discharge capacity required for the battery pack, multiple battery cells are connected in parallel to form a battery pack. Therefore, the number of battery cells included in the battery pack can be set in various ways depending on the required output voltage or charge / discharge capacity.

[0004] When configuring a battery pack by connecting multiple battery cells in series or parallel, it is common to first configure a battery module comprising at least one battery cell, preferably multiple battery cells, and then use at least one such battery module and add other components to configure the battery pack. Here, the battery module refers to a component in which multiple battery cells are connected in series or parallel, and the battery pack may refer to a component in which multiple battery modules are connected in series or parallel to increase capacity and output.

[0005] Recently, energy storage devices are being used to store generated electricity, and the energy storage devices can be configured to include multiple battery modules.

[0006] A battery module is composed of multiple battery cells, and when the battery module is installed horizontally (with the wide bottom surface facing downwards), the thickness of the outer case increases and the installation area increases.

[0007] The purpose of the present invention is to provide an energy storage device that can secure structural rigidity while reducing the installation area and having a thin thickness.

[0008] An energy storage device according to one embodiment of the present invention comprises: a plurality of battery modules including a plurality of battery cells; a case for accommodating the battery modules; and a support frame for supporting the plurality of battery modules within the case; wherein the support frame comprises a lower support portion on which at least one battery module is supported; and an upper support portion disposed on an upper side of the lower support portion and on which at least one battery module is supported.

[0009] Additionally, the case includes a bottom portion; and a side portion disposed on one side of the case; wherein the side portion has a larger area than the bottom portion.

[0010] Additionally, the battery module includes a plurality of battery cells; and a module case that accommodates the battery cells.

[0011] Additionally, the module case includes a bottom portion; and two side portions arranged on opposite sides of the module case; wherein the side portions have a larger area than the bottom portion.

[0012] Additionally, the battery cells are arranged in a vertical stack within the module case.

[0013] Additionally, the battery cell may be a pouch-type battery cell.

[0014] In addition, the support frame further includes a plurality of vertical support members, and the lower support member and the upper support member are coupled to the plurality of vertical support members.

[0015] Additionally, two vertical support members are arranged in front of the battery module in the support frame, and two vertical support members are arranged in the rear of the battery module.

[0016] Additionally, the vertical support member includes a pair of wing plates; and a connecting plate connecting the pair of wing plates.

[0017] Additionally, the pair of wing plates are formed by being folded integrally from the connecting plate.

[0018] Additionally, the lower support member includes a support plate on which the battery module is supported; and two horizontal members arranged on both sides of the support plate and respectively connected to the vertical support members.

[0019] In addition, the lower support portion further includes two side portions that are bent downward at both ends of the support plate, and the horizontal member is formed by bending at the side portions.

[0020] Additionally, the length of the horizontal member is formed to be longer than the support plate.

[0021] Additionally, the lower support further includes a sheet disposed on the support plate.

[0022] Additionally, the sheet may be a polycarbonate sheet.

[0023] In addition, the upper support member includes a support plate on which the battery module is supported; and two horizontal members arranged on both sides of the support plate and respectively connected to the vertical support member.

[0024] In addition, the upper support portion further includes two side portions that are bent downward at both ends of the support plate, and the horizontal member is formed by bending at the side portions.

[0025] Additionally, the length of the horizontal member is formed to be longer than the support plate.

[0026] Additionally, the upper support further includes a sheet disposed on the support plate.

[0027] Additionally, the support frame further includes a top fixing member for supporting the upper portion of the support frame.

[0028] Additionally, the case further includes a door on one side for opening and closing the case.

[0029] An energy storage device according to one embodiment of the present invention has a reduced installation area, is easy to install, and can secure structural rigidity.

[0030] FIG. 1 is a perspective view of an energy storage device according to one embodiment of the present invention.

[0031] Figure 2 is an exploded perspective view of the energy storage device illustrated in Figure 1.

[0032] Figure 3 is a perspective view of a battery module in one embodiment of the present invention.

[0033] FIG. 4 is a drawing showing the inside of a battery module in one embodiment of the present invention.

[0034] FIG. 5 is a drawing showing an example of a battery cell in one embodiment of the present invention.

[0035] FIG. 6 is a drawing illustrating a support frame that supports a battery module in an energy storage device according to one embodiment of the present invention.

[0036] Figure 7 is a detailed drawing of the vertical support member in Figure 6.

[0037] Fig. 8 is a detailed drawing of the lower support in Fig. 6,

[0038] Fig. 9 is a detailed drawing of the upper support in Fig. 6,

[0039] Figure 10 is a front view of the battery module mounted on the upper support in Figure 6.

[0040] FIG. 11 is a perspective view of a support frame having a battery module mounted thereon in one embodiment of the present invention.

[0041] FIG. 12 is a perspective view of a support frame equipped with a battery module, viewed from another angle, in one embodiment of the present invention.

[0042] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms. These embodiments are provided only to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Accordingly, in some embodiments, well-known process steps, well-known device structures, and well-known techniques are not specifically described to avoid ambiguity in the interpretation of the present invention. Like reference numerals refer to like elements throughout the specification.

[0043] In order to clearly represent multiple layers and regions in the drawings, the thickness may be enlarged. Similar parts are designated by the same drawing reference numerals throughout the specification. When an element such as a layer, film, region, or plate is said to be "over" another element, this includes not only the case where it is "directly over" that element but also the case where there are other elements in between. Conversely, when an element is said to be "directly over" another element, this means that there are no other elements in between. Furthermore, when an element such as a layer, film, region, or plate is said to be "under" another element, this includes not only the case where it is "directly under" that element but also the case where there are other elements in between. Conversely, when an element is said to be "directly under" another element, this means that there are no other elements in between.

[0044] An energy storage device (1000) according to a preferred embodiment of the present invention will be described in detail with reference to the drawings.

[0045] FIG. 1 is a perspective view of an energy storage device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the energy storage device illustrated in FIG. 1, FIG. 3 is a perspective view of a battery module in an embodiment of the present invention, FIG. 4 is a view showing the inside of a battery module in an embodiment of the present invention, FIG. 5 is a view showing an example of a battery cell in an embodiment of the present invention, FIG. 6 is a view showing a support frame for supporting a battery module in an energy storage device according to an embodiment of the present invention, FIG. 7 is a detailed view of a vertical support member in FIG. 6, FIG. 8 is a detailed view of a lower support in FIG. 6, FIG. 9 is a detailed view of an upper support in FIG. 6, FIG. 10 is a front view of a state in which a battery module is mounted on the upper support in FIG. 6, FIG. 11 is a perspective view of a support frame on which a battery module is mounted in an embodiment of the present invention, and FIG. 12 is a view of a battery module viewed from another angle in an embodiment of the present invention. This is a perspective view of the mounted support frame.

[0046] An energy storage device (1000) according to one embodiment of the present invention may include a case (100), a plurality of battery modules (200), and a support frame (300) for supporting the battery modules (200).

[0047] The above case (100) forms an outer case of an energy storage device (1000), can accommodate a plurality of battery modules (200) and a support frame (300), and can include a main body (110) and a door (120).

[0048] In the case (100), the main body (110) may include a bottom portion (111), a front portion (112), a rear portion (114), a side portion (113), and an upper portion (115).

[0049] The bottom part (111) of the main body (110) can be formed in the form of a plate extending horizontally. On the outer lower surface of the bottom part (111), four support legs (111a) for supporting the case (100) can be respectively arranged at the corners of the bottom part (111).

[0050] In the main body (110), the front part (112) and the rear part (114) can form the front and rear of the case (100), respectively, and can be arranged at the front and rear edges of the bottom part (111) and the upper surface part (115), respectively.

[0051] In the main body (110), the side portion (113) forms one side of the case (100) and can be placed on the left or right edge of the bottom portion (111) and the upper surface portion (115), respectively.

[0052] The front part (112), the rear part (114), and the side part (113) can form the side of the case (100) together with the door (120).

[0053] In the main body (110), the upper surface (115) may be placed on the upper part of the case (100) and may cover the inside of the case (100). An electrical device such as a PCS (Power Conversion System) may be installed on the outer upper surface of the upper surface (115), and may have a structure for installing the electrical device.

[0054] The door (120) is coupled to one side of the main body (110) and can open and close the interior of the case (100). The door (120) can be positioned on the opposite side of the side portion (113) of the case (100) to face the side portion (113) and form one side of the case (100).

[0055] The door (120) can be rotatably connected to the main body (110) by a hinge, and can also be connected to the main body (110) so as to be completely detachable from the main body (110).

[0056] In one embodiment of the present invention, a locking device for the door (120) may be provided.

[0057] In the case (100), the areas of the side portion (113) and the door (120) may be the same or similar to each other, and the areas of the side portion (113) and the door (120) may be larger than the area of ​​the bottom portion (111). For example, the areas of the side portion (113) and the door (120) may be more than twice that of the bottom portion (111), and therefore, as illustrated, one side with a large area in the case (100) of the energy storage device (1000) may be arranged in a form in which it stands up by forming the side of the case (100) rather than forming the bottom, thereby reducing the installation area.

[0058] The battery module (200) may include a module case (210) as shown in FIGS. 3 and 4, and a plurality of cell module assemblies (CMAs (Cell Module Assemblies)) (not shown) accommodated within the module case (210).

[0059] A cell module assembly (CMA) accommodated in a module case (210) comprises a plurality of battery cells, and in each cell module assembly, a plurality of battery cells can be arranged in close contact.

[0060] Each battery cell may be, for example, a pouch-type battery cell (250). The pouch-type battery cell (250) may have a structure in which an electrode assembly is accommodated within a pouch-type case.

[0061] For example, a cell module assembly may include a plurality of battery cells that are mutually stacked or closely packed, and each battery cell may be provided with electrode leads (251, 252) at the front and / or rear ends, and a positive electrode lead may be provided at the front end and a negative electrode lead may be provided at the rear end. In the cell module assembly, a plurality of battery cells (250) may be arranged so as to be electrically connected to each other.

[0062] In the cell module assembly of the present embodiment, battery cells can be stacked vertically, and a plurality of cell module assemblies can be arranged vertically within a module case (210).

[0063] Figure 5 is a drawing illustrating a pouch-type battery cell (250).

[0064] A battery cell (250) provided in a pouch type may include an electrode assembly and a cell case (255) that accommodates the electrode assembly.

[0065] The cell case (255) of the battery cell (250) may be a pouch-type cell case (255) for accommodating the electrode assembly. The cell case (255) includes a lower case and an upper case covering the lower case, and the upper and lower cases may be formed as a single body. In addition, as illustrated in FIG. 5, the connecting portions of the upper and lower cases may be formed in a structure in which they are bent and folded. In addition, as illustrated, the upper case may completely cover the lower case, and a sealing portion (254) may be formed at the periphery.

[0066] Both the upper and lower cases can be formed of a laminate structure including an inner covering layer, a metal layer, and an outer covering layer. The inner covering layer is located on the inside of the cell case (255) based on the metal layer and is in direct contact with the electrode assembly, so it must have insulation and electrolytic resistance. In addition, in order to seal it from the outside, the sealing portion where the inner layers are thermally bonded must have excellent thermal bonding strength. The metal layer is located between the inner covering layer and the outer covering layer and serves as a barrier layer that prevents moisture or various gases from penetrating into the battery from the outside. A preferable material for the metal layer in contact with the inner covering layer is an aluminum (Al) thin film that is lightweight and has excellent formability. The outer covering layer is located on the outside of the cell case (255) based on the metal layer, and this outer covering layer can use a heat-resistant polymer with excellent tensile strength, moisture permeability, and air permeability to protect the electrode assembly while ensuring heat resistance and chemical resistance. For example, nylon or polyethylene terephthalate can be used.

[0067] A receiving groove (256) may be formed in each of the upper and lower cases, and an electrode assembly may be accommodated in the receiving groove (256) of the upper and lower cases. In the cell case (255) of the pouch-type battery cell (250), the part shown in FIG. 5 is the upper case, and the lower case is arranged below it. In the present embodiment, the lower case of the cell case (255) may be arranged to face the bottom portion (3211) of the module case (210), and the lower case and its receiving groove (256) may be arranged parallel to the bottom portion (211).

[0068] The electrode assembly housed in the cell case (255) may be one of a group consisting of a jelly-roll type electrode assembly having a structure in which a separator is interposed between long sheet-shaped positive and negative electrodes and then rolled up, a stack type electrode assembly having unit cells having a structure in which rectangular positive and negative electrodes are stacked with a separator interposed between them, a stack-folding type electrode assembly in which the unit cells are rolled up by a long separator film, and a lamination-stack type electrode assembly in which the unit cells are stacked with a separator interposed between them and attached to each other.

[0069] Additionally, the electrode assembly may include two electrode tabs (250a, 250b) and two electrode leads (251, 252) connected to the two electrode tabs (250a, 250b) by welding, respectively.

[0070] One of the two electrode tabs (250a, 250b) may be a positive tab and the other may be a negative tab.

[0071] Among the two electrode leads (251, 252), one electrode lead (251, 252) may be a positive lead connected to the positive tab, and the other electrode lead (251, 252) may be a negative lead connected to the negative tab. For example, the positive electrode lead (251, 252) may be made of aluminum (Al), and the negative electrode lead (251, 252) may be made of copper (Cu).

[0072] A lead film (253) may be attached to each of the electrode leads (251, 252). The lead film (253) attached to the electrode leads (251, 252) is positioned between the electrode leads (251, 252) and the cell case (255) to prevent a short circuit from occurring between the electrode leads (251, 252) and the cell case (255) and to improve sealing strength, thereby preventing leakage of the electrolyte, etc.

[0073] The two electrode leads (251, 252) are shown as being arranged on each side of the electrode assembly, but may be arranged on only one side of the electrode assembly depending on the arrangement of the electrode tabs.

[0074] In the cell module assembly, the battery cells are not limited to pouch-shaped battery cells, but may be composed of other shapes such as square or cylindrical battery cells.

[0075] The cell module assembly may be placed within the module case (210) of the battery module (200) in an open form without an independent housing. In addition, as another example, the cell module assembly may be in a form in which a plurality of battery cells are housed within a housing, and the cell module assembly may be housed within individual housings and placed independently within the module case (210).

[0076] As another example, the battery module (200) may have multiple battery cells stacked and arranged within a module case (210).

[0077] The module case (210) may include a bottom portion (211), a front portion (212), a rear portion (214), two side portions (213, 216), and a top portion (215).

[0078] The bottom part (211) of the module case (210) can form the bottom of the module case (210) in the form of a plate extending in a horizontal direction.

[0079] The front part (212) and the rear part (214) can form the front and rear parts of the module case (210), respectively, and can be arranged at the front and rear edges of the bottom part (211) and the upper surface part (215), respectively.

[0080] The two side portions (213, 216) form both sides of the module case (210) and can be placed on the left and right edges of the bottom portion (211) and the top portion (215), respectively.

[0081] The front portion (212), the rear portion (214), and both side portions (213, 216) can form the side surfaces of the module case (210).

[0082] The upper surface (215) can be placed on the upper part of the module case (210) and cover the inside of the module case (210).

[0083] In the module case (210), the area of ​​the side portions (213, 216) may be larger than the area of ​​the bottom portion (211). For example, the area of ​​the side portions (213, 216) may be more than twice that of the bottom portion (211), and therefore, as illustrated, one side of the module case (210) with a large area may not form the bottom, but may be arranged to form a side of the module case (210) and stand up, thereby reducing the installation area within the energy storage device (1000).

[0084] These multiple battery modules (200) can be placed on a support frame (300) within a case (100).

[0085] FIG. 6 is a drawing illustrating a support frame (300) that supports a battery module (200) in an energy storage device (1000) according to one embodiment of the present invention.

[0086] The above support frame (300) can support a plurality of battery modules (200). In the present embodiment, the support frame (300) can include a plurality of vertical support members (310), a lower support member (320), an upper support member (330), a top fixing member (340), and a module fixing member (350).

[0087] In this embodiment, four vertical support members (310) can be arranged, two vertical support members (310) can be arranged in front of the battery module (200), and two vertical support members (310) can be arranged in the rear of the battery module (200).

[0088] The vertical support member (310) may include a pair of wing plates (311) and a connecting plate (312).

[0089] A connecting plate (312) disposed between a pair of wing plates (311) can connect the pair of wing plates (311). The pair of wing plates (311) and the connecting plate (312) can be formed integrally, and the pair of wing plates (311) in the vertical support member (310) can be bent outwardly (in the opposite direction of the battery module (200)) at a certain angle (for example, a right angle) from both ends of the connecting plate (312) and can be disposed parallel to each other.

[0090] Each wing plate (311) may have a plurality of apertures (313) spaced apart from each other along the length.

[0091] The vertical support member (310) can have its structural rigidity reinforced by having a pair of wing plates (311) bent on both sides of the connecting plate (312).

[0092] The lower support member (320) is arranged on the lower side of the support frame (300) and can support a plurality of battery modules (200).

[0093] In this embodiment, two battery modules (200) are shown to be supported by the lower support member (320), but two or more battery modules (200) may be placed on the lower support member (320).

[0094] The lower support (320) may include a support plate (321) and two horizontal members (322) (see FIG. 8).

[0095] The support plate (321) may be formed as a plate having an approximately rectangular shape, and the battery module (200) may be supported on the support plate (321). The support plate (321) may be integrally formed with a folded plate (321b) that is folded upward along an edge in the width direction (X-axis direction) of the support plate (321), and may be fixed by being joined to two vertical support members (310) arranged at the rear of the battery module (200) through a joining hole (321c) formed in the folded plate (321b) using a bolt or the like. The support plate (321) may be joined to the vertical support members (310) by a bolt, a rivet, welding, or the like. The material of the support plate (321) may be, for example, metal.

[0096] A sheet (323) can be placed on the support plate (321).

[0097] The sheet (323) can be bonded to or attached with an adhesive on the support plate (321), and can be, for example, a resin sheet, a polycarbonate sheet, etc. As the sheet (323), the polycarbonate sheet has excellent electrical insulation, durability, weather resistance, impact resistance, etc., and can stably support a heavy battery module (200).

[0098] In this embodiment, a sheet (323) is placed on a support plate (321), so that when a heavy battery module (200) is placed on the support plate (321), friction is reduced, making it easier to install the battery module (200) and preventing scratches between contacting parts.

[0099] The area of ​​the sheet (323) may be equal to or smaller than the area of ​​the support plate (321), and may be larger than the sum of the areas of the bottoms (211) of the two battery modules (200).

[0100] It may include two side portions (321a) that are bent downward at both ends of the support plate (321) along the longitudinal direction (Y-axis direction). The length of the side portions (321a) along the longitudinal direction (Y-axis direction) may be the same as that of the support plate (321).

[0101] Two horizontal members (322) can be formed by bending (for example, bending at a right angle) toward the support plate (321) at the end of the side portion (321a). The horizontal members (322) can be parallel to the support plate (321).

[0102] The horizontal member (322) may be formed integrally with the support plate (321), and one end of each horizontal member (322) may be joined to the lower portion of the vertical support member (310) positioned at the front of the battery module (200). The horizontal member (322) may be joined to the vertical support member (310) using bolts, rivets, welding, or the like.

[0103] In addition, the horizontal member (322) may be formed in a plate shape and may be extended and protruded further than the support plate (321) in the longitudinal direction (Y-axis direction). Accordingly, the length of the horizontal member (322) in the longitudinal direction (Y-axis direction) may be longer than that of the support plate (321). Accordingly, a space (S) may be formed between the front portion of the battery module (200) disposed on the support plate (321) and the vertical support member (310) coupled to the horizontal member (322). In the present embodiment, by securing the space (S) inside the vertical support member (310) in this way, the insertion and assembly of the battery module (200) is facilitated, and electrical work is facilitated along with the installation of electrical devices and wiring (see FIG. 4).

[0104] In the lower support member (320), the support plate (321), the side member (321a), and the horizontal member (322) can be formed integrally.

[0105] The lower support member (320) is bent at both ends of the support plate (321) to place the side member (321a), and the horizontal member (322) is bent at the side member (321a) to place the horizontal member, thereby reinforcing the rigidity and stably supporting the heavy battery module (200).

[0106] The upper support member (330) may be positioned above the lower support member (320) in the support frame (300) to support a plurality of battery modules (200). In the present embodiment, the upper support member (330) may be positioned between the lower support member (320) and the top fixing member (340), and may be coupled to the vertical support member (310) at approximately the center.

[0107] The configuration of the upper support (330) is similar to that of the lower support (320). Although the drawing shows two battery modules (200) being supported on the upper support (330), two or more battery modules (200) may be placed on the upper support (330).

[0108] The upper support member (330) may include a support plate (331) and two horizontal members (332) (see FIG. 9).

[0109] In the upper support member (330), the support plate (331) may be formed as a plate having an approximately square shape. A folded plate (331b) folded upward along the edge of the width direction (X-axis direction) of the support plate (331) may be integrally formed on the support plate (331), and may be fixed by being joined to two vertical support members (310) arranged at the rear of the battery module (200) using bolts or the like through a joining hole (331c) formed in the folded plate (331b). The support plate (331) may be made of, for example, a metal material, and may be joined to the vertical support members (310) by means of bolts, rivets, welding, or the like.

[0110] A sheet (333) may be placed on the support plate (331). The sheet (333) may be bonded to the support plate (321) or attached with an adhesive, and may be, for example, a resin sheet, a polycarbonate sheet, or the like.

[0111] Similarly to the lower support (320), a sheet (333) is placed on the support plate (331) on the upper support (330), so that friction is reduced when placing a heavy battery module (200) on the support plate (331), thereby facilitating installation of the battery module (200).

[0112] The area of ​​the sheet (333) may be equal to or smaller than the area of ​​the support plate (331), and may be larger than the sum of the areas of the bottoms (211) of the two battery modules (200).

[0113] A side portion (331a) may be arranged by bending downwards at both ends of the support plate (331) along the longitudinal direction (Y-axis direction). The length of the side portion (331a) along the longitudinal direction (Y-axis direction) may be the same as that of the support plate (331).

[0114] Two horizontal members (332) can be formed by bending (for example, bending at a right angle) from the end of the side portion (331a) toward the support plate (321). The horizontal members (332) can be parallel to the support plate (331).

[0115] In the upper support member (330), the horizontal member (332) can be formed integrally with the support plate (331), and one end of each horizontal member (332) can be connected to the central portion of the vertical support member (310) arranged in front of the battery module (200) using a bolt, rivet, welding, or the like.

[0116] In addition, the horizontal member (332) may be formed in a plate shape and may extend and protrude further than the support plate (331) in the longitudinal direction (Y-axis direction). Accordingly, the length of the horizontal member (332) in the longitudinal direction (Y-axis direction) may be longer than that of the support plate (331). Accordingly, a space (S) may be formed between the front portion of the battery module (200) disposed on the support plate (331) and the vertical support member (310) coupled to the horizontal member (332), and by securing the space (S) inside the vertical support member (310), insertion and assembly of the battery module (200) are facilitated, and electrical work is facilitated.

[0117] In the upper support member (330), the support plate (331), the side member (331a), and the horizontal member (332) can also be formed integrally.

[0118] The upper support member (330) is bent at both ends of the support plate (331) to place the side member (331a), and the horizontal member (332) is bent at the side member (331a) to place the horizontal member, thereby reinforcing the rigidity and stably supporting the heavy battery module (200).

[0119] The above top fixing member (340) can be placed on the upper part of the support frame (300) and can serve to fix and support the upper part of the support frame (300).

[0120] The top fixing member (340) may include two fixing members (341) and two connecting members (342).

[0121] In the top fixing member (340), one end of the fixing member (341) may be coupled to the vertical support member (310) at the front of the battery module (200), and the other end of the fixing member (341) may be coupled to the vertical support member (310) at the rear of the battery module (200). The two fixing members (341) may be arranged parallel to each other. The fixing member (341) may be coupled to the vertical support member (310) by means of a bolt, a rivet, welding, or the like.

[0122] A connecting member (342) may have one end connected to one fixed member (341) and the other end connected to another fixed member (341) so as to connect two fixed members (341) to each other. The two connecting members (342) may be spaced apart from each other along the longitudinal direction (Y-axis direction) of the fixed member (341) and may be arranged parallel to each other.

[0123] In this way, the two fixing members (341) can connect the two vertical support members (310) arranged at the front and rear of the battery module (200), respectively, and the two connecting members (342) can connect the two fixing members (341) to each other, so that the top fixing member (340) can fix and support the upper end of the support frame (300).

[0124] In this embodiment, the module fixing member (350) is coupled to the vertical support member (310) to fix two battery modules (200) and prevent movement and vibration.

[0125] As shown, upper and lower module fixing members (350) can be placed on two vertical support members (310) at the rear of the battery module (200), and the lower module fixing member (350) can fix two battery modules (200) placed on the lower support member (320), and the upper module fixing member (350) can fix two battery modules (200) placed on the upper support member (330).

[0126] The module fixing member (350) may include a joining plate (351) that is joined and fixed to two vertical support members (310), and the rear of the two battery modules (200) may be supported by the joining plate (351).

[0127] In this embodiment, the support frame (300) has the configuration described above, thereby stably securing the rigidity of the structure. In addition, the energy storage device (1000) according to this embodiment has a reduced installation area and a thinner thickness (distance in the X-axis direction).

[0128] Although the present invention has been described with reference to preferred embodiments as described above, it is not limited to the above embodiments, and various changes and modifications may be made by a person having ordinary skill in the art to which the invention pertains within a scope that does not depart from the spirit of the present invention.

[0129] The present invention can provide an energy storage device that has a reduced installation area, is easy to install, and can secure structural rigidity.

Claims

1. A plurality of battery modules comprising a plurality of battery cells; A case for accommodating the above battery module; and A support frame supporting a plurality of the battery modules within the case; Including, The above support frame a lower support on which at least one battery module is supported; and An upper support portion disposed on the upper side of the lower support portion and having at least one battery module supported thereon; An energy storage device comprising:

2. In paragraph 1, The above case has a bottom; and including a side portion arranged on one side of the case; An energy storage device wherein the side portion has a larger area than the bottom portion.

3. In paragraph 1, The above battery module comprises a plurality of battery cells; and A module case accommodating the above battery cell; An energy storage device comprising:

4. In paragraph 3, The above module case has a bottom; and Includes two side portions arranged on both sides of the above module case; An energy storage device wherein the side portion has a larger area than the bottom portion.

5. In paragraph 4, An energy storage device in which the above battery cells are arranged in a vertical stack within the module case.

6. In paragraph 5, The above battery cell is an energy storage device that is a pouch-type battery cell.

7. In paragraph 1, The above support frame further comprising a plurality of vertical support members; An energy storage device in which the lower support member and the upper support member are connected to a plurality of the vertical support members.

8. In paragraph 1, Two vertical support members are arranged in front of the battery module in the support frame, An energy storage device in which two vertical support members are arranged at the rear of the battery module.

9. In paragraph 7, The above vertical support member a pair of wing plates; and A connecting plate connecting the above pair of wing plates; An energy storage device comprising:

10. In paragraph 9, An energy storage device in which the above pair of wing plates are formed by being integrally folded from the above connecting plate.

11. In paragraph 7, The above lower support part A support plate on which the battery module is supported; and An energy storage device comprising two horizontal members arranged on both sides of the support plate and each connected to the vertical support member.

12. In paragraph 11, The above lower support part Further comprising two side portions that are bent downward at both ends of the above support plate, An energy storage device in which the above horizontal member is formed by bending at the side portion.

13. In paragraph 11, An energy storage device in which the length of the horizontal member is formed longer than the support plate.

14. In paragraph 11, An energy storage device wherein the lower support portion further includes a sheet disposed on the support plate.

15. In Article 14 The above sheet is an energy storage device which is a polycarbonate sheet.

16. In paragraph 7, The upper support part above A support plate on which the battery module is supported; and An energy storage device comprising two horizontal members arranged on both sides of the support plate and each connected to the vertical support member.

17. In paragraph 16, The upper support part above Further comprising two side portions that are bent downward at both ends of the above support plate, An energy storage device in which the above horizontal member is formed by bending at the side portion.

18. In paragraph 16, An energy storage device in which the length of the horizontal member is formed longer than the support plate.

19. In paragraph 16, An energy storage device wherein the upper support portion further includes a sheet disposed on the support plate.

20. In paragraph 1, An energy storage device wherein the support frame further includes a top fixing member for supporting the upper portion of the support frame.

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