Battery pack

Abstract

A battery pack according to an embodiment of the present invention may include a battery module, a processing unit including a corner portion formed by two side plates and an opening portion formed in the corner portion, the processing unit being electrically connected to the battery module and controlling charging and discharging of the battery module, and a corner cover coupled to the corner portion and covering the opening.

Description

Technical Field

[0001] This application claims priority based on Korean Patent Application No. 10-2021-0183245 filed on December 20, 2021, and all the contents disclosed in the specification and drawings of the said application are incorporated into this application.

[0002] The present invention relates to a battery pack.

Background Art

[0003] Currently, commercially available secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, lithium secondary batteries, etc. Among them, lithium secondary batteries have attracted attention for their advantages of being able to charge and discharge freely because they hardly have a memory effect compared to nickel-based secondary batteries, having a very low self-discharge rate, and a high energy density.

[0004] This type of lithium secondary battery mainly uses a lithium-based oxide and a carbon material as a positive electrode active material and a negative electrode active material, respectively. A lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate coated with such a positive electrode active material and a negative electrode active material are arranged with a separator interposed therebetween, and an exterior material for enclosing the electrode assembly together with an electrolytic solution, for example, a battery case.

[0005] Generally, lithium secondary batteries are classified into a can-type secondary battery in which the electrode assembly is built in a metal can and a pouch-type secondary battery in which the electrode assembly is built in a pouch of an aluminum laminate sheet according to the shape of the exterior material.

[0006] Such secondary batteries are widely used not only in small devices such as portable electronic devices but also in medium and large-sized devices such as electric vehicles and energy storage systems (ESS), and the degree of their use is rapidly increasing. Furthermore, recently, a residential energy storage system has been widely used to store and supply electric power for use in buildings such as houses and buildings. Incidentally, it can be said that the core component of such a residential energy storage system is a battery pack.

[0007] In various battery packs, including the battery pack used in such a residential ESS, a plurality of battery cells (secondary batteries) are included in order to increase the capacity and / or output. In particular, an ESS that can flexibly vary the configuration of the battery pack according to the needs of various customers is desired. Also, an ESS that can vary its form so that it can be installed even with various spatial constraints is eagerly desired.

Summary of the Invention

Problems to be Solved by the Invention

[0008] An object of the present invention is to solve the above-described problems and other problems.

[0009] Another object of the present invention may be to provide a battery pack capable of variously configuring the number of battery modules.

[0010] Still another object of the present invention may be to provide a battery pack capable of variously configuring the number of processing units.

[0011] Still another object of the present invention may be to provide a battery pack whose appearance can be configured in various shapes.

[0012] Still another object of the present invention may be to provide a battery pack including a corner cover capable of covering a corner portion between adjacent battery modules or between an adjacent processing unit and a battery module.

[0013] Still another object of the present invention may be to provide a battery pack capable of improving productivity and assemblability through component sharing.

Means for Solving the Problems

[0014] A battery pack according to an aspect of the present invention for achieving the above object includes a battery module, a corner portion formed by two side plates, and an opening formed in the corner portion, and is electrically connected to the battery module and controls charging and discharging of the battery module. A processing unit, and a corner cover coupled to the corner portion and covering the opening.

[0015] Further, the battery pack may further include a cable that passes through the opening and electrically connects the battery module and the processing unit.

[0016] Furthermore, the battery pack may further include a front cover disposed on the front surface of the processing unit and covering the front side of the corner cover.

[0017] Furthermore, the corner cover may protrude forward and include a protruding portion fitted inside the front cover.

[0018] Furthermore, the battery module is located behind the processing unit, and the battery pack may further include a coupling member having one side fastened to a corner portion of the processing unit and the other side fastened to a corner portion of the battery module.

[0019] Furthermore, the corner cover may be coupled to the coupling member so as to be slidable in the front-rear direction.

[0020] Furthermore, the corner cover may cover the one side of the coupling member.

[0021] Furthermore, the corner cover may protrude from the inner surface and include a hook coupled to the coupling member.

[0022] Furthermore, the corner cover is a first corner cover, and the battery pack may further include a second corner cover coupled to a corner of the battery module and covering the other side of the coupling member.

[0023] Furthermore, the first corner cover may further include a groove formed on the rear side, and the second corner cover may protrude from the front side and include a second protrusion fitted into the groove.

[0024] In addition to these, the opening is a first opening, the battery module has a second opening at a corner where the coupling member is fastened, the battery pack further includes a cable passing through the first opening and the second opening, and the second corner cover may cover the second opening and the cable.

[0025] An energy storage system according to one aspect of the present invention for achieving the above object includes a battery pack according to one aspect of the present invention.

Advantages of the Invention

[0026] According to at least one of the embodiments of the present invention, it is possible to provide a battery pack capable of variously configuring the number of battery modules.

[0027] According to at least one of the embodiments of the present invention, it is possible to provide a battery pack capable of variously configuring the number of processing units.

[0028] According to at least one of the embodiments of the present invention, it is possible to provide a battery pack whose appearance can be configured in various forms.

[0029] According to at least one of the embodiments of the present invention, it is possible to provide a battery pack including a corner cover capable of covering a corner portion between adjacent battery modules or between an adjacent processing unit and a battery module.

[0030] According to at least one of the embodiments of the present invention, it is possible to provide a battery pack capable of improving productivity and assemblability through component sharing.

[0031] The drawings attached to this specification illustrate desirable embodiments of the present invention and are for the purpose of further understanding the technical idea of the present invention together with the content of the invention. Therefore, the present invention is not construed as being limited only to the matters described in the drawings.

Brief Description of the Drawings

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Best Mode for Carrying Out the Invention

[0033] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms and words used in this specification and the claims are not to be construed as being limited to ordinary or dictionary meanings. The inventor himself interprets them in accordance with the meaning and concept corresponding to the technical idea of the present invention in accordance with the principle that he can appropriately define the concept of the terms in order to explain the invention in the best way.

[0034] Therefore, it should be understood that the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, there may be various equivalents and modifications that can replace them at the time of this application.

[0035] Expressions such as "first" and "second" can be used to describe various components. These expressions are only used for the purpose of distinguishing the components from other components, and the essence, order, or sequence of the components are not limited by these expressions.

[0036] FIG. 1 is a perspective view showing a battery pack according to an embodiment of the present invention. FIG. 2 is a diagram showing a partial component of the battery pack according to an embodiment of the present invention in an exploded manner. FIG. 3 is a diagram showing a partial component of the battery pack according to an embodiment of the present invention in an enlarged manner. Referring to FIGS. 1 to 3, the battery pack according to an embodiment of the present invention may include a battery module 100, a processing unit 200, and a corner cover 400.

[0037] The battery module 100 may include a first corner portion 111 formed by two side plates and a first opening 112 formed in the first corner portion 111. The battery module 100 may have a rectangular parallelepiped shape. The housing 110 may form the appearance of the battery module 100. The housing 110 of the battery module 100 may include a front plate and four side plates. And the four side plates of the housing 110 may form four corner portions 111. The four corner portions may be configured in a chamfered shape. Alternatively, the corner portion 111 may be a plate that joins two side plates. Alternatively, the corner portion 111 may be formed by two side plates. The corner portion 111 may include an opening 112. The opening 112 may be open in the front or X-axis direction. The four corner portions 111 may have substantially the same shape. The battery module 100 may include a plurality of battery cells inside. At this time, the battery cell may be a secondary battery. The battery module 100 may charge the battery cell or discharge the power of the battery cell to the outside. According to the required amount of power and output, the battery pack may be composed of a plurality of battery modules 100. For example, as shown in FIG. 1, the battery pack may include two battery modules 100a and 100b.

[0038] The processing unit 200 is located on the front side of the battery module 100a, controls the charging and discharging of the battery module 100, and may include a second corner portion 211 adjacent to the first corner portion 111 and a second opening 212 formed in the second corner portion 211. The processing unit 200 may have a rectangular parallelepiped shape. The housing 210 may form the appearance of the processing unit 200. The appearance or size of the processing unit 200 and the battery module 100 may be configured to be very similar or substantially the same. The housing 210 of the processing unit 200 may include a front plate and four side plates. And the four side plates of the housing 210 may form four corner portions 211. The four corner portions 211 may be configured to have a chamfered shape. Alternatively, the corner portion 211 may be a plate that joins two side plates. Alternatively, the corner portion 211 may be formed by two side plates. The corner portion 211 may include an opening 212. The opening 212 may be in a shape that is open in the front or X-axis direction. The four corner portions 211 may have substantially the same shape. The processing unit 200 may be electrically connected, coupled or joined to a plurality of battery modules 100. The processing unit 200 may control the charging and discharging of the battery module 100. Also, the processing unit 200 may sense and acquire the state information of the battery module 100. The battery pack may be configured to include a plurality of processing units 200 to control a plurality of battery modules 100 in some cases.

[0039] For example, as shown in FIG. 1, the battery pack may include two battery modules 100 and one processing unit 200. The two battery modules 100 and the one processing unit 200 may be electrically connected to each other. The processing unit 200 can control the charging and discharging of the three battery modules 100, and can acquire or sense state information such as the voltage or temperature of the three battery modules 100. Each corner portion 111 of the battery module 100 and each corner portion 211 of the processing unit 200 may be configured to have substantially the same shape.

[0040] The corner cover 400 may be coupled to the corner portion 211 of the processing unit 200. And the corner cover 400 can cover the opening 212 of the processing unit 200. The corner cover 400 may be referred to as a single corner cover 400. The single corner cover 400 may be configured to be coupled to any of the four corner portions 111 of the battery module 100 and the four corner portions 211 of the processing unit 200.

[0041] According to such a configuration according to an embodiment of the present invention, the battery pack may include one or more battery modules 100 in various combinations and one or more processing units 200. And the positional relationship or coupling relationship between the battery module 100 and the processing unit 200 constituting the battery pack may be configured in various ways. Thereby, it becomes possible to be configured to flexibly respond to the various required amounts of electric power and outputs of the battery pack. Further, by configuring the outer shape of the battery pack to be deformable in various ways, the battery pack is freed from the constraints of the space in which it is installed.

[0042] Further, according to such a configuration according to an embodiment of the present invention, the single corner cover 400 can protect the components inside the battery pack by covering the corner portion 111 of the adjacent battery module 100 and the corner portion 211 of the processing unit 200. The battery module 100 and the processing unit 200 may include openings 112 and 212 for connecting to external components. When the openings 112 and 212 are exposed to the outside, there is a risk that the inside may be damaged due to the penetration of foreign matter. The single corner cover 400 can protect the inside of the battery module 100 and the processing unit 200 by covering the openings 112 and 212. This makes it possible to improve the safety and lifespan of the battery pack.

[0043] Further, according to such a configuration according to an embodiment of the present invention, when the battery pack is installed outdoors, the single corner cover 400 can prevent sunlight from penetrating into the inside of the battery module 100 and the processing unit 200 through the openings 112 and 212. This makes it possible to improve the safety and lifespan of the battery pack.

[0044] FIG. 4 is an exploded and enlarged view showing some components of a battery pack according to an embodiment of the present invention. Referring to FIGS. 2 to 4, the battery pack according to an embodiment of the present invention may further include a cable 700 that passes through the opening 212 and electrically connects the battery module 100 and the processing unit 200.

[0045] The cable 700 can electrically connect the battery module 100 and the processing unit 200. Also, the cable 700 may electrically connect two battery modules 100. Further, when the battery pack includes a plurality of processing units 200, the cable 700 may electrically connect two processing units 200. The cable 700 may be composed of a plurality of cables. The cable 700 can transmit power and signals. One or more battery modules 100 and one or more processing units 200 constituting the battery pack can be arranged in various shapes. The cable 700 can be configured to pass through the openings 112 and 212 formed at the corner portions 111 and 211 of the battery module 100 and the processing unit 200, which are positions where it is easy to electrically connect the battery module 100 and the processing unit 200. The cable 700 passes through the openings 112 and 212 formed at the corner portions 111 and 211 of either the battery module 100 or the processing unit 200, and can pass through the openings 112 and 212 formed at the corner portions 111 and 211 of either another battery module 100 or another processing unit 200.

[0046] The single corner cover 400 can cover the cable 700. The cable 700 and the openings 112 and 212 can be covered by the single corner cover 400.

[0047] According to such a configuration according to an embodiment of the present invention, the single corner cover 400 can prevent foreign matter from penetrating into the cable 700 by covering the cable 700. Also, the single corner cover 400 can prevent the cable 700 from being damaged by sunlight by covering the cable 700. As a result, it becomes possible to improve the safety and lifespan of the battery pack.

[0048] Referring to FIGS. 1 to 4, the battery module 100 of the battery pack according to an embodiment of the present invention may be located behind the processing unit 200. Further, the battery pack may include a coupling member 600 having one side fastened to the corner portion 211 of the processing unit 200 and the other side fastened to the corner portion 111 of the battery module 100.

[0049] A plurality of battery modules 100 may be provided. The first battery module 100a may be located behind the processing unit 200. The second battery module 100b may be located behind the first battery module 100a. The coupling member 600a may couple the processing unit 200 and the first battery module 100a. Further, the coupling member 600b may couple the first battery module 100a and the second battery module 100b. One side and the other side of the coupling member 600 may be fastened to the corner portions 111 and 211 by the fastening member S. The coupling member 600 may be configured to be fastened to any of the four corner portions of the battery module 100 and the four corner portions of the processing unit 200.

[0050] For example, referring to FIG. 4, one side of the coupling member 600a may be fastened to the corner portion 211 of the processing unit 200, and the other side may be fastened to the corner portion 111 of the first battery module 100a. And one side of the coupling member 600b may be fastened to the corner portion 111 of the first battery module 100a, and the other side may be fastened to the corner portion 111 of the second battery module 100b.

[0051] According to such a configuration according to an embodiment of the present invention, the coupling member 600 can stably connect, couple or fasten the battery module 100 constituting the battery pack and the processing unit 200.

[0052] Referring to FIGS. 3 and 4, a battery pack according to an embodiment of the present invention may include a front cover 300 disposed on the front surface of the processing unit 200 and covering the front side of the corner cover 400.

[0053] The front cover 300 may be disposed on the front surface of the processing unit 200. Alternatively, the front cover 300 may be fastened or coupled to the front plate or the front surface of the processing unit 200. The front cover 300 may have an area wider than the front surface or the front plate of the processing unit 200. The processing unit 200 may include a port 220 on the front surface or the front plate. The cable 700 may be connected to the port 220. The processing unit 200 may be electrically connected to an adjacent battery module 100 or another processing unit 200 via the port 220. The front cover 300 may cover the cable 700 connected to the port 120 and the port 220.

[0054] Also, the front cover 300 may cover the front side of the single corner cover 400. The front cover 300 may cover the space between the single corner cover 400 and the corner portion 211 of the processing unit 200.

[0055] According to such a configuration according to an embodiment of the present invention, the front cover 300 can prevent foreign matter from penetrating by covering the space between the single corner cover 400 and the corner portion 211 of the processing unit 200. Thereby, it becomes possible to improve the safety and the life of the battery pack.

[0056] FIG. 5 is a view showing a part of the cross-sectional configuration taken along the cutting line B - B' of FIG. 3. Referring to FIG. 5, the corner cover 400 of the battery pack according to an embodiment of the present invention may include a protruding portion 450 that protrudes forward and is fitted inside the front cover 300.

[0057] The single corner cover 400 may include a protruding portion 450 that protrudes forward. The protruding portion 450 may be formed across the first part 410 and the second part 420.

[0058] The front cover 300 may form a space. The protruding portion 450 may be fitted into the space formed by the front cover 300. Alternatively, it may be fitted inside the front cover 300.

[0059] According to such a configuration according to an embodiment of the present invention, the protruding portion 450 can close the gap between the front cover 300 and the single corner cover 400, and it becomes possible to prevent foreign matter from penetrating into the gap between the front cover 300 and the single corner cover 400. As a result, it becomes possible to improve the safety and lifespan of the battery pack.

[0060] FIG. 7 is a diagram showing the corner cover 400 of the battery pack according to an embodiment of the present invention. Referring to FIGS. 5 and 7, the corner cover 400 according to an embodiment of the present invention may be coupled to the coupling member 600 so as to be slidable in the front-rear direction. The single corner cover 400 may slide and come into contact with or adhere to the front cover 300. The protruding portion 450 of the single corner cover 400 may be fitted inside the front cover 300.

[0061] According to such a configuration according to an embodiment of the present invention, the battery module 100 and the processing unit 200 may include openings 112 and 212 for connection to external components. When the openings 112 and 212 are exposed to the outside, there is a risk of internal damage due to the penetration of foreign matter. The single corner cover 400 can effectively close the gap through which foreign matter can penetrate into the battery pack by being coupled to the coupling member so as to be slidable. As a result, the inside of the battery module 100 and the processing unit 200 can be protected, and it becomes possible to improve the safety and lifespan of the battery pack.

[0062] FIG. 6 is a view showing a part of a cross-sectional configuration taken along the cutting line C-C' of FIG. 3. Referring to FIG. 6, a single corner cover 400 of a battery pack according to an embodiment of the present invention may include a placement portion 411 formed along an edge of a first part 410. Further, the single corner cover 400 may include a placement portion 421 formed along an edge of a second part 420. The placement portions 411 and 421 of the single corner cover 400 may be placed on the stepped portion 213 of the corner portion 211. The stepped portion 213 may support the placement portions 411 and 421 of the single corner cover 400. Also, the single corner cover 400 may cover the opening 212 of the corner portion 211.

[0063] According to such a configuration according to an embodiment of the present invention, the single corner cover 400 can maintain a stable coupling state with the battery module 100 or the processing unit 200 by being placed on the first stepped portion 113 and the second stepped portion 213. As a result, the stability of the battery pack can be improved.

[0064] Referring to FIG. 7, a corner cover 400a according to an embodiment of the present invention may include hooks 471 and 481 that protrude from the inner surface and are coupled to a coupling member 600a. The single corner cover 400a may have a shape of a bent plate. The single corner cover 400a may include a first part 410 and a second part 420. The first part 410 and the second part 420 may form a shape of a bent plate. For example, the first part 410 and the second part 420 may be vertically connected.

[0065] The single corner cover 400a may include a first guide 482 protruding from the inner surface and a first hook 481. The first guides 482 may be provided in a pair. The first hooks 481 may be provided in a pair. The pair of first guides 482 may be respectively provided on the first part 410 and the second part 420. The pair of first hooks 481 may be respectively provided on the first part 410 and the second part 420.

[0066] The single corner cover 400a may include a second guide 472 protruding from the inner surface and a second hook 471. The second guides 472 may be provided in a pair. The second hooks 471 may be provided in a pair. The pair of second guides 472 may be respectively provided on the first part 410 and the second part 420. The pair of second hooks 471 may be respectively provided on the first part 410 and the second part 420.

[0067] The first hook 481 may be fastened to the coupling member 600a. The first hook 481 may be fastened to the hole 601 of the coupling member 600a. The holes 601 of the coupling member 600a may be formed in a pair. A pair of first hooks 481 may be fastened to one hole 601. The coupling member 600a may be located between the pair of first guides 482. After the single corner cover 400 is hooked to the coupling member 600a, it may be slid in the front-rear direction or the X-axis direction. The hole 601 may be formed in the shape of a long hole so that the first guide 482 can slide. The first guide 482 may guide the single corner cover 400a to slide along the coupling member 600a.

[0068] According to such a configuration according to an embodiment of the present invention, the single corner cover 400a can be easily hooked to the coupling member 600a without a separate fastening member. As a result, the assemblability and productivity of the battery pack can be improved.

[0069] FIG. 8 is a view showing a corner cover 400b of a battery pack according to an embodiment of the present invention. Referring to FIG. 8, the corner cover 400b according to an embodiment of the present invention may include hooks 471 and 481 that protrude from the inner surface and are coupled to the coupling members 600a and 600b.

[0070] The second hook 471 can be fastened to the coupling member 600b. The second hook 471 can be fastened to the hole 601 of the coupling member 600a. The holes 601 of the coupling member 600a can be formed in a pair. A pair of second hooks 471 can be fastened to one hole 601. The coupling member 600a can be positioned between a pair of second guides 472. After the single corner cover 400b is hook-engaged with the coupling member 600a, it can be slid in the front-rear direction or the X-axis direction. The hole 601 can be formed in an elongated hole shape so that the second guide 472 can be slidably moved. The second guide 472 can guide the single corner cover 400b to slide along the coupling member 600a.

[0071] The coupling member 600a can be provided with holes 602 and 603 on one side and the other side. The coupling member 600 can be fastened to the corner portions 111 and 211 by a fastening member S passing through the holes 602 and 603. The hole 602 formed on one side can be open in the front side or the X-axis direction. Such a shape enables easy fastening to the corner portions 111 and 211 in response to tolerances occurring in the production processes of the battery module 100 and the processing unit 200.

[0072] According to such a configuration according to an embodiment of the present invention, the single corner cover 400b can be easily hook-engaged with the coupling member 600a without a separate fastening member. Thereby, it becomes possible to improve the assemblability and productivity of the battery pack.

[0073] Referring to FIG. 8, a battery pack according to an embodiment of the present invention may include a first corner cover 400a and a second corner cover 400b. The first corner cover 400a may cover one side of the coupling member 600a, and the second corner cover 400b may cover the other side of the coupling member 600a. The first corner cover 400a and the second corner cover 400b may be the same component or parts.

[0074] Two single corner covers 400a and 400b can be coupled to one coupling member 600a. Also, one coupling member 600a can be covered by two single corner covers 400a and 400b.

[0075] According to such a configuration according to an embodiment of the present invention, by coupling two single corner covers 400a and 400b to one coupling member 600a, the number of parts can be reduced. As a result, the assemblability and productivity of the battery pack can be improved.

[0076] Referring to FIG. 8, the first corner cover of the battery pack according to an embodiment of the present invention includes a groove formed on the rear side, and the second corner cover may include a second protrusion that protrudes forward and is fitted into the groove.

[0077] The single corner covers 400a and 400b may have a groove 460 formed on the rear side. The groove 460 may be formed across the first part 410 and the second part 420. The groove 460 may have a shape corresponding to the protrusion 450. After the second single corner cover 400b is hooked to the coupling members 600a and 600b, it can slide. By the sliding movement, the protrusion 450 of the second single corner cover 400b can be fitted into the groove 460 of the first single corner cover 400a.

[0078] According to such a configuration according to an embodiment of the present invention, it is possible to prevent a gap from occurring between adjacent single corner covers 400a and 400b. As a result, it is possible to prevent foreign matter from penetrating into the battery pack, and the safety and life of the battery pack can be improved.

[0079] Referring to FIGS. 3, 4, and 8, the processing unit 200 of the battery pack according to an embodiment of the present invention includes a second opening 212, and the battery module 100a may include a first opening 112. And the battery pack may include a cable 700 passing through the second opening 212 and the first opening 112. Also, the second corner cover 400b may cover the first opening 112 and the cable 700.

[0080] The cable 700 may pass through the opening 212 of the processing unit 200 and the opening 112 of the battery module 100a. The single corner covers 400a, 400b may cover the corner portions 211 of the processing unit 200 and the corner portions 111 of the battery module 100a. Also, the single corner covers 400a, 400b may cover the opening 212 of the processing unit 200 and the opening 112 of the battery module 100a. Further, the single corner covers 400a, 400b may cover the coupling members 600a, 600b. Furthermore, the single corner covers 400a, 400b may cover the cable 700.

[0081] According to such a configuration according to an embodiment of the present invention, the single corner covers 400a, 400b prevent the corner portions 211, 111 of the processing unit 200 or the battery module 100a and the components adjacent to the corner portions 211, 111 from being exposed to the outside, and can prevent foreign matter from penetrating from the outside. Thereby, it becomes possible to improve the safety and life of the battery pack.

[0082] FIG. 9 is a diagram showing a corner cover 400c of a battery pack according to an embodiment of the present invention. FIG. 10 is a diagram showing the corner cover 400c of the battery pack and the mounting bracket 910 according to an embodiment of the present invention. Referring to FIGS. 4, 9, and 10, a battery pack according to an embodiment of the present invention may include a mounting bracket 910. The mounting bracket 910 may be fastened to a corner portion 111 of the battery module 100b by a fastening member S. The mounting bracket 910 may fix the battery pack to a structure such as a wall.

[0083] The mounting bracket 910 may include a coupling portion 911. The hook 481 of the single corner cover 400c may be coupled to the coupling portion 911. The coupling portion 911 may be located between the guides 482 of the single corner cover 400c. Also, the single corner cover 400c may cover at least a part of the mounting bracket 910.

[0084] Referring to FIG. 1, the battery pack may include a stand 920. The stand 920 may be provided respectively on the processing unit 200 or the battery module 100. A plurality of stands 920 may be connected, coupled, or fastened to each other by a coupling member 600. The stand 920 can increase the height of the battery pack. When the battery pack is installed outdoors or on the ground, the battery pack may be damaged by rainwater or the like. By including the stand 920, the battery pack can protect the battery module 100 or the processing unit 200.

[0085] The above-described plurality of battery modules 100, 100a, 100b are components having the same structure and shape, although they are described with different reference numerals for ease of explanation. Further, the coupling members 600, 600a, 600b are components having the same structure and shape, although they are described with different reference numerals for ease of explanation. Furthermore, the single corner covers 400, 400a, 400b are components having the same structure and shape, although they are described with different reference numerals for ease of explanation.

[0086] An energy storage system according to an embodiment of the present invention includes one or more of the battery packs according to an embodiment of the present invention described above. Further, an energy storage system according to an embodiment of the present invention may further include normal components included in the energy storage system, in addition to such battery packs. In particular, an energy storage system according to an embodiment of the present invention can be a residential (building) energy storage system used for storing energy in a house, a building, or the like.

[0087] On the other hand, in this specification, directional terms such as up, down, left, right, front, and back are used, but these terms are merely used for ease of explanation and it is obvious to those skilled in the art of the present invention that they may vary depending on the position of the object and the position of the observer.

[0088] As described above, the present invention has been described with reference to limited embodiments and drawings, but the technical idea of the present invention is not limited thereto at all, and it goes without saying that those having ordinary knowledge in the technical field to which the present invention pertains can make various modifications and variations within the equivalent scope of the technical idea and the claims of the present invention.

Description of Reference Numerals

[0089] 100 Battery module 100a First battery module 100b Second battery module 110 Housing 111 First corner 112 First opening 113 First stepped portion 120 Port 200 Processing unit 210 Housing 211 Second corner 212 Second opening 213 Second stepped portion 220 Port 300 Front cover 400 Corner cover 400a First corner cover 400b Second corner cover 400c Corner cover 410 First part 411 Mounting portion 420 Mounting portion 420 Second part 421 Mounting portion 450 Protrusion 460 Groove 471 Second hook 472 Second guide 481 First hook 482 First guide 482 Guide 600 Coupling member 700 Cable 910 Mounting bracket S Fastening member

Claims

1. A battery module, between two adjacent side plates, comprising a corner portion extending obliquely with respect to the main planes of the two side plates and an opening formed in the corner portion, electrically connected to the battery module, and a processing unit for controlling charging and discharging of the battery module; a corner cover coupled to the corner portion and covering the opening; A battery pack including the above.

2. The battery pack according to claim 1, further comprising a cable passing through the opening and electrically connecting the battery module and the processing unit.

3. The battery pack according to claim 1 or 2, further comprising a front cover disposed on the front surface of the processing unit and covering the front side of the corner cover.

4. The corner cover, has a protruding portion protruding forward and fitted inside the front cover, the battery pack according to claim 3.

5. The battery module, is located behind the processing unit, The battery pack, The battery pack according to claim 1 or 2, further comprising a coupling member having one side fastened to a corner portion of the processing unit and the other side fastened to a corner portion of the battery module.

6. The corner cover, is coupled to the coupling member so as to be slidable in the front-rear direction, the battery pack according to claim 5.

7. The corner cover, covers the one side of the coupling member, the battery pack according to claim 5.

8. The corner cover, has a hook protruding from the inner surface and coupled to the coupling member, the battery pack according to claim 5.

9. The corner cover, is a first corner cover, The battery pack, The battery pack according to claim 5, further comprising a second corner cover coupled to a corner portion of the battery module and covering the other side of the coupling member.

10. The first corner cover, further includes a groove formed on the rear side, The second corner cover, has a second protruding portion protruding forward and fitted into the groove, the battery pack according to claim 9.

11. The opening, is a first opening, The battery module, The corner portion where the coupling member is fastened is provided with a second opening, The battery pack, Further includes a cable passing through the first opening and the second opening, The second corner cover, The battery pack according to claim 9, covering the second opening and the cable.

12. An energy storage system including the battery pack according to claim 1 or 2.

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