Battery pack and energy storage system including the same

Abstract

A battery pack according to one embodiment of the present invention includes a battery module having one or more battery cells, a control module connected to the battery module and configured to manage the battery module, a fire tank containing a fire extinguishing agent and coupled to at least one of the battery module and the control module, and a side cover attached to one side of the fire tank and configured to guide an electrical connection between the battery module and the control module.

Description

Technical Field

[0001] The present invention relates to a battery pack and an energy storage system including the same, and more particularly, to a battery pack with improved convenience in installation work and an energy storage system including the same.

[0002] This application claims priority based on Korean Patent Application No. 10-2021-0188507 filed on December 27, 2021, and all the contents disclosed in the specification and drawings of the application are incorporated into this application.

Background Art

[0003] Currently commercially available secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, lithium secondary batteries, etc. Among these, lithium secondary batteries have attracted attention because they have almost no memory effect compared to nickel-based secondary batteries, so they can be freely charged and discharged, have a very low self-discharge rate, and have a high energy density. [[ID=第十七行]]

[0004] Such lithium secondary batteries mainly use lithium-based oxides and carbon materials as the positive electrode active material and the 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 positive electrode active material and negative electrode active material are arranged with a separator interposed therebetween, and an exterior material that seals and houses the electrode assembly together with an electrolytic solution, that is, a battery case.

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

[0006] Such rechargeable batteries are widely used not only in small devices such as portable electronic devices, but also in medium- and large-scale devices such as electric vehicles and energy storage systems (ESS), and their use is rapidly increasing. Furthermore, recently, residential energy storage systems are widely used to store and supply electricity for use in buildings such as houses and office buildings. A key component of such residential energy storage systems is the battery pack.

[0007] Various battery packs, including those used in residential ESS (Energy Storage Systems), contain multiple battery cells (secondary batteries) to increase capacity and / or output. In particular, to increase the energy density of the battery pack, multiple battery cells are often arranged in a densely packed manner in a very narrow space.

[0008] Conventional battery packs, especially those for residential use, generally consist of a battery module and a control module for managing the battery module. However, there is a problem in that the installation work, such as the cables for the electrical connection between the battery module and the control module, is relatively difficult or inconvenient.

[0009] Therefore, in battery packs, there is a need to explore methods that can improve convenience during installation when making electrical connections between the battery module and the control module. [Overview of the Initiative] [Problems that the invention aims to solve]

[0010] Therefore, an object of the present invention is to provide a battery pack that can improve the convenience of installation work for electrical connection between a battery module and a control module, and an energy storage system including the same.

[0011] However, the technical problems that this invention aims to solve are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description of the invention below. [Means for solving the problem]

[0012] To solve the above objectives, the present invention provides a battery pack comprising: a battery module having one or more battery cells; a control module connected to the battery module and configured to manage the battery module; a fire extinguishing tank containing a fire extinguishing agent and coupled to at least one of the battery module and the control module; and a side cover attached to one side of the fire extinguishing tank and configured to guide the electrical connection between the battery module and the control module.

[0013] Preferably, the fire extinguishing tank includes a connecting member for electrically connecting the battery module and the control module, and the side cover may be provided such that at least one side of the fire extinguishing tank is exposed when the connecting member is installed, in order to guide the installation of the connecting member.

[0014] Preferably, the side cover can be detachably attached to one side of the fire extinguishing tank.

[0015] Preferably, the side cover can be rotatably attached to one side of the fire extinguishing tank.

[0016] Preferably, the side cover can be mounted so as to be at least partially slidable, exposing one side of the fire extinguishing tank to the outside.

[0017] Preferably, one side of the fire extinguishing tank may be provided with a connecting member housing section that accommodates the connecting member and is provided at a predetermined depth along the height direction of the fire extinguishing tank.

[0018] Preferably, the battery pack may also include a sealing member positioned between one side of the fire extinguishing tank and the side cover in order to seal one side of the fire extinguishing tank.

[0019] Preferably, the side cover can be attached to one of the left or right sides of the fire extinguishing tank.

[0020] Preferably, the upper and lower ends of the connecting member may be provided with tank connectors for connecting the battery module and the control module.

[0021] Furthermore, the present invention provides an energy storage system characterized by including a battery pack according to the above-described embodiment. [Effects of the Invention]

[0022] Through the various embodiments described above, it is possible to provide a battery pack and an energy storage system including the same that can enhance the convenience of installation work for electrical connection between the battery module and the control module.

[0023] Furthermore, various other additional effects can be achieved by various embodiments of the present invention. These various effects of the present invention will be described in detail in each embodiment, or the description of effects that will be easily understood by those skilled in the art will be omitted.

[0024] The following drawings accompanying this specification illustrate preferred embodiments of the invention and, together with the detailed description of the invention, serve to further illustrate the technical idea of ​​the invention; therefore, the invention should not be construed as being limited solely to what is shown in the drawings. [Brief explanation of the drawing]

[0025] [Figure 1]It is a perspective view schematically showing the configuration of a battery pack according to an embodiment of the present invention. [Figure 2] It is a view showing a form in which a side cover is separated from the battery pack of FIG. 1. [Figure 3] It is an exploded perspective view of a battery pack according to an embodiment of the present invention. [Figure 4] It is a view schematically showing the configuration in which the fire extinguishing tank of FIG. 3 is assembled. [Figure 5] It is a bottom perspective view of a control module according to an embodiment of the present invention. [Figure 6] It is a view schematically showing the separated form of the side cover of FIG. 2 as seen from another side. [Figure 7] It is a view for explaining a side cover according to another embodiment of the present invention. [Figure 8] It is a view for explaining a side cover according to still another embodiment of the present invention. [Figure 9] It is a view for explaining a side cover according to still another embodiment of the present invention. [Figure 10] It is a view for explaining the configuration of a battery pack according to another embodiment of the present invention. [Figure 11] It is a perspective view schematically showing the form of the fire extinguishing tank according to an embodiment of the present invention as seen from above and below. [Figure 12] It is a perspective view schematically showing the form of the fire extinguishing tank according to an embodiment of the present invention as seen from above and below. [Figure 13] It is a cross-sectional view schematically showing a partial configuration of a battery pack according to an embodiment of the present invention. [Figure 14] It is a view showing an enlarged view of the configuration of a partial cross-section of a battery pack according to an embodiment of the present invention as seen from the front. [Figure 15] It is a view showing the configuration of a partial cross-section of a battery pack according to an embodiment of the present invention as seen from above. [Figure 16]This figure schematically shows a cross-sectional view of a battery pack according to one embodiment of the present invention, as seen from the side. [Modes for carrying out the invention]

[0026] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. Prior to this, terms and words used in this specification and in the claims shall not be interpreted in their usual and dictionary sense, but rather in a sense and concept appropriate to the technical idea of ​​the present invention, in accordance with the principle that the inventor himself may appropriately define the concept of terms in order to best describe the invention.

[0027] Therefore, it should be understood that the configurations shown in the embodiments described herein represent only one of the most preferred embodiments of the present invention and do not represent the entire technical concept of the present invention, and that there are various equivalents and modifications that can be substituted therein at the time of filing this application.

[0028] On the other hand, while this specification uses terms to indicate directions such as up, down, left, right, front, and back, these terms are for convenience of explanation and it will be obvious to those skilled in the art that they may change depending on the position of the object in question, the position of the observer, etc.

[0029] Figure 1 is a schematic perspective view showing the configuration of a battery pack according to one embodiment of the present invention, and Figure 2 is a diagram showing the battery pack of Figure 1 with the side cover separated.

[0030] Referring to Figures 1 and 2, the battery pack may include a battery module 100, a control module 200, a fire extinguishing tank 300, and a side cover 400.

[0031] The battery module 100 may comprise one or more battery cells, where each battery cell may represent a secondary battery. A secondary battery may comprise an electrode assembly, an electrolyte, and a battery case. Furthermore, the battery cells provided in the battery module 100 may be pouch-type secondary batteries. However, other forms of secondary batteries, such as cylindrical batteries or prismatic batteries, may also be used in the battery module 100 of the present invention.

[0032] Furthermore, the battery module 100 may include a module case for housing battery cells. In particular, the module case may have an empty space inside, in which multiple battery cells can be housed. For example, as shown in Figure 1, the module case may be formed in a substantially rectangular parallelepiped shape and erected vertically in the vertical direction (Z-axis direction) perpendicular to the ground.

[0033] The control module 200 can control the overall operation of the battery pack. In particular, the control module 200 can be electrically connected to the battery module 100. The control module 200 can also be configured to manage the battery module 100.

[0034] In particular, the control module 200 may be configured to control the charging and discharging operations of the battery module 100. Furthermore, the control module 200 may be configured to measure, calculate, receive, and control various electrical, physical, and chemical properties of the battery module 100, the battery cells contained therein, or their surrounding environment. For example, the control module 200 can measure, calculate, and control the voltage, current, temperature, SOC (State of Charge), SOH (State of Health), and internal resistance of the battery cells and the battery module 100.

[0035] The control module 200 can be powered by the battery module 100 for managing the battery module 100. Furthermore, the control module 200 can exchange various types of data with the battery module 100 or other external devices via a wired or wireless communication network.

[0036] The control module 200 can be equipped with various electrical components such as a BMS (Battery Management System), relays, and current sensors. Furthermore, the control module 200 can be equipped with a control housing for housing these electrical components.

[0037] Furthermore, the control module 200 may be equipped with a pack terminal. Such a pack terminal may be configured to connect the battery pack to an external charging or discharging device. For example, the pack terminal may be equipped with an outlet, plug, connector, etc., for connection to a commercial power supply or load. In this case, the control module 200 may be equipped with a power supply path for exchanging charging and discharging power with the battery module 100. Such a power supply path can function as a path for exchanging charging and discharging power between the pack terminal and the battery module 100.

[0038] The fire extinguishing tank 300 can contain a fire extinguishing agent. Here, various substances that can suppress or quell a fire or lower the temperature can be used as the fire extinguishing agent. The fire extinguishing tank 300 may also be equipped with a tank housing for containing such a fire extinguishing agent in its internal space.

[0039] The fire extinguishing tank 300 can be connected to at least one of the battery module 100 and the control module 200. For example, the fire extinguishing tank 300 can be connected to the battery module 100. Alternatively, the fire extinguishing tank 300 can be connected to the control module 200. In this embodiment, the fire extinguishing tank 300 is positioned between the battery module 100 and the control module 200 and can be connected to each of them.

[0040] In particular, the fire extinguishing tank 300 may be configured to be detachable. For example, the tank housing of the fire extinguishing tank 300 may be configured to be attachable to and detachable from the module case of the battery module 100. Alternatively, the tank housing of the fire extinguishing tank 300 may be configured to be attachable to and detachable from the control housing of the control module 200.

[0041] The side cover 400 can be attached to one side of the fire extinguishing tank 300. Such a side cover 400 may be configured to guide the electrical connection between the battery module 100 and the control module 200.

[0042] The control module 200 requires an electrical connection to the battery module 10 for managing the battery module 100. The side cover 400 can guide such an electrical connection on one side of the fire extinguishing tank 300, which is located between the battery module 100 and the control module 200.

[0043] In this embodiment, the side cover 400 guides such electrical connections on one side of the fire extinguishing tank 300 between the battery module 100 and the control module 200. This allows for even simpler electrical connections during battery pack installation without requiring additional space for electrical connections.

[0044] The following will examine in more detail the guide structure for electrical connection provided by the aforementioned side cover 400.

[0045] Figure 3 is an exploded perspective view of a battery pack according to one embodiment of the present invention, Figure 4 is a schematic diagram showing the configuration in which the fire extinguishing tank of Figure 3 is assembled, Figure 5 is a lower perspective view of a control module according to one embodiment of the present invention, and Figure 6 is a schematic diagram showing the separated form of the side cover of Figure 2 viewed from another side.

[0046] Referring to Figures 3 to 6, and Figures 1 and 2 above, the fire extinguishing tank 300 may be equipped with a connecting member 330 that electrically connects the battery module 100 and the control module 200. Here, the side cover 400 may be provided such that at least one side of the fire extinguishing tank 300 is exposed when the connecting member 330 is installed, in order to guide the installation of the connecting member 330.

[0047] This allows workers and others to more easily connect the connecting member 330 to the battery module 100 and the control module 200 on one exposed side of the fire extinguishing tank 300 when installing the connecting member 330.

[0048] Furthermore, workers can visually confirm the connection of the connecting member 330 on one exposed side of the fire extinguishing tank 300, thereby improving the accuracy of the connection of the connecting member 330 and minimizing the possibility of incorrect assembly.

[0049] Specifically, the side cover 400 can be detachably attached to one side of the fire extinguishing tank 300. Such detachable attachment can be achieved by bolting together fastening members S.

[0050] The aforementioned worker can connect the side cover 400 to one side of the fire extinguishing tank 300 using at least one fastening member S, and can separate the side cover 400 from one side of the fire extinguishing tank 300 by releasing the fastening member S as needed for connecting or inspecting the connecting member 330.

[0051] Since the fastening member S is connected and disconnected on one side of the fire extinguishing tank 300, the connection member 330 can be guided to be installed simply by separating the side cover 400, without having to perform tasks such as separating or dismantling the battery module 100 or the control module 200.

[0052] Therefore, in this embodiment, the side cover 400, which is detachably attached to one side of the fire extinguishing tank 300, further enhances convenience in installation work for electrical connection.

[0053] Such a side cover 400 can be attached to one of the left or right sides of the fire extinguishing tank 300. That is, since the side cover 400 is provided on one side of the fire extinguishing tank 300, the exposure of the battery pack on the front side when installed can be minimized, the reduction in aesthetic appeal caused by the side cover 400 can be minimized, the installation workspace can be directed to the side, and the usability of the space in front of the battery pack can be improved.

[0054] The following discussion will examine other configurations of the battery pack of the present invention.

[0055] First, according to the embodiment of the present invention, safety can be greatly improved by attaching a fire extinguishing tank 300 to a battery pack containing a battery module 100 and a control module 200. In particular, if an abnormal situation occurs in the battery pack, for example, if a thermal runaway situation occurs inside the battery module 100, or if a fire occurs in the battery module 100 or the control module 200, the fire extinguishing agent can suppress the occurrence of the fire or extinguish the fire that has occurred. Furthermore, the temperature of the battery module 100 and the control module 200 can be lowered to prevent thermal runaway situations and overheating. Therefore, in the event of an abnormal situation such as a fire or overheating in the battery pack, it is possible to prevent the risk of fire or other dangers from increasing to other parts outside the battery pack.

[0056] The fire extinguishing tank 300 may be installed between the battery module 100 and the control module 200. In particular, the battery module 100 may be located below the control module 200. In this case, the fire extinguishing tank 300 may be located above the battery module 100 and below the control module 200.

[0057] According to such embodiments of the present invention, in a battery pack including a battery module 100 and a control module 200, the fire extinguishing tank 300 can be positioned adjacent to both the battery module 100 and the control module 200. Therefore, if a thermal event occurs in the battery module 100 or the control module 200, a rapid and effective response can be achieved.

[0058] The battery module 100 and the control module 200 may be configured to be electrically and mechanically coupled to each other.

[0059] For example, the battery module 100 may have a module connector for electrical connection at its top, as shown by E1 in Figure 4. The control module 200 may have a control connector at its bottom, as shown by E2 in Figure 5. In this case, the control connector E2 may be configured to be directly connected to the module connector E1. In particular, the module connector E1 and the control connector E2 are electrically connected to each other, and charge / discharge power and electrical signals (data) can be transmitted between them. Specifically, the battery module 100 and the control module 200 may each be equipped with a separate power connector for receiving charge / discharge power and a separate communication connector for receiving electrical signals.

[0060] Furthermore, the battery module 100 may have a module fastening portion formed at its upper part, as shown by C1 in Figure 4. Similarly, the control module 200 may have a control fastening portion formed at its lower part, as shown by C2 in Figure 5. Here, the control fastening portion C2 and the module fastening portion C1 may be configured to be able to connect and fix to each other. For example, the module fastening portion C1 and the control fastening portion C2 may be configured to be fastened to each other by bolt connection. Furthermore, by fastening and releasing between the module fastening portion C1 and the control fastening portion C2 in this way, the control fastening portion C2 may be directly attached to or separated from the module fastening portion C1.

[0061] Thus, the battery module 100 and the control module 200 can be configured to be directly coupled to each other mechanically and electrically. In particular, the control module 200 can be coupled to the battery module 100 in a plug-in manner, where electrical connection is made simultaneously with attachment to the battery module 100. However, in the case of a battery pack according to one aspect of the present invention, the fire extinguishing tank 300 can be interposed in the space between the battery module 100 and the control module 200, as shown by the dotted line in Figure 4.

[0062] According to this embodiment of the present invention, it is possible to utilize conventional battery pack structures and production lines as much as possible while ensuring safety through the fire extinguishing tank 300. In particular, according to one embodiment of the present invention, in a battery pack configuration in which the battery module 100 and the control module 200 are directly attached, the fire extinguishing tank 300 is configured to be interposed between the battery module 100 and the control module 200, thereby ensuring safety against thermal events.

[0063] Here, the electrical connection between the battery module 100 and the control module 200 can be made using the connecting member 330 described above. As discussed above, this connection using the connecting member 330 can be made by attaching and detaching the side cover 400 from one side of the fire extinguishing tank 300.

[0064] Figure 7 is a diagram illustrating a side cover according to another embodiment of the present invention.

[0065] Since the side cover 402 according to this embodiment is similar to the side cover 400 of the above-described embodiment, redundant explanations of substantially identical or similar components will be omitted, and the following discussion will focus on the differences from the above-described embodiment.

[0066] Examining Figure 7, the side cover 402 can be rotatably attached to one side of the fire extinguishing tank 300. Specifically, the side cover 402 can be hinged to one side of the fire extinguishing tank 300 and rotatably attached in the left-right direction.

[0067] This allows workers to perform tasks such as connecting the connecting member 330 and subsequent inspections and maintenance without completely separating the side cover 402 from the fire extinguishing tank 300.

[0068] In this embodiment, since the side cover 402 is not completely separated from the fire extinguishing tank 300 during operations such as attaching or managing the connecting member 330, there is no need to place the separated side cover 402 in a separate space during the above operations, thereby further improving work efficiency.

[0069] On the other hand, the side cover 402 can also be mounted so as to be rotatable in the vertical direction rather than the horizontal direction. For example, the side cover 402 can be hinged to one lower end of the fire extinguishing tank 300 and mounted so as to be rotatable in the vertical direction.

[0070] In this case, when the side cover 402 is opened, it can be positioned open along the horizontal direction of the fire extinguishing tank 300, so that necessary work tools can be securely attached to the upper side of such a side cover 402, further improving work efficiency.

[0071] Figures 8 and 9 illustrate a side cover according to one or another embodiment of the present invention.

[0072] Since the side cover 405 according to this embodiment is similar to the side cover 400 of the embodiment described above, redundant explanations of configurations that are substantially the same or similar to those of the above embodiment will be omitted, and the following discussion will focus on the differences from the above embodiment.

[0073] Referring to Figures 8 and 9, the side cover 405 can be mounted so as to be at least partially slidable, exposing one side of the fire extinguishing tank 300 to the outside. For example, the side cover 405 can be mounted so as to slide vertically (in the Z-axis direction) of the fire extinguishing tank 300, exposing the mounting space for the connecting member 330 when the connecting member 330 is installed or inspected.

[0074] For this type of sliding mounting, the fire extinguishing tank 300 and the battery module 100 can be provided with a slide rail R for sliding the side cover 405.

[0075] In this embodiment, the side cover 405 slides to expose one side of the fire extinguishing tank 300, which is the mounting space for the connecting member 330. As in the embodiment described above, the above-mentioned operations can be performed without separating the side cover 405.

[0076] Furthermore, in this embodiment, the side cover 405 slides to expose or close one side of the fire extinguishing tank 300. When one side of the fire extinguishing tank 300 is open, the space occupied by the side cover 405 on the side of the battery pack can be reduced, further improving space utilization.

[0077] Figure 10 is a diagram illustrating the configuration of a battery pack according to another embodiment of the present invention.

[0078] Referring to Figure 10, the battery pack may further include a sealing member 500.

[0079] The sealing member 500 may be positioned between one side of the fire extinguishing tank 300 and the side cover 400 in order to seal one side of the fire extinguishing tank 300. Specifically, the sealing member 500 may be sandwiched near the edge of the inner surface of the side cover 400 or near the edge of the fire extinguishing tank 300.

[0080] Such a sealing member 500 may be provided as a sealing gasket having a substantially square shape. The sealing member 500 may be made of an elastic material such as rubber, silicone, or urethane in order to ensure sealing performance.

[0081] In this embodiment, the sealing member 500 enhances the sealing force on one side of the fire extinguishing tank 300 when the side cover 400 is attached to one side of the fire extinguishing tank 300. This makes it possible to more effectively prevent moisture, foreign matter, etc. from penetrating into the electrical connection components such as the connecting member 330 after the side cover 400 has been attached.

[0082] Figures 11 and 12 are schematic perspective views of a fire extinguishing tank 300 according to one embodiment of the present invention, as seen from above and below. Figure 13 is a schematic cross-sectional view showing a part of the battery pack according to one embodiment of the present invention. For example, Figure 13 shows the cross-sectional configuration along the line A1-A1' in Figure 1.

[0083] First, referring to Figure 11, the fire extinguishing tank 300 may be provided with a tank fastening portion at its upper end for connecting to the control module 200, as shown by the portion indicated by C32. Such a tank fastening portion C32 may be configured to be connectable to the control module 200, with the fastening portion being provided on the tank housing of the fire extinguishing tank 300. For example, as shown in Figure 5, if a control fastening portion C2 is provided at the lower end of the control module 200, the tank fastening portion C32 formed at the upper end of the fire extinguishing tank 300 may be configured to be connectable to the control fastening portion C2. More specifically, the upper end tank fastening portion C32 may be configured to be bolted together with the control fastening portion C2. For example, as shown by the portion indicated by A2 in Figure 13, the upper end tank fastening portion C32 and the control fastening portion C2 can be bolted together with each other. Furthermore, the control module 200 and the fire extinguishing tank 300 can be fixed together by such a bolted connection between the control fastening portion C2 and the upper end tank fastening portion C32.

[0084] In particular, the control module 200 may be provided so as to be directly attached to the battery module 100. In this case, the control fastening portion C2 may be configured to be originally connected to the module fastening portion C1 of the battery module 100. However, in the battery pack according to the present invention, the tank fastening portion C32 provided on the fire extinguishing tank 300 may be configured to be able to connect to such a control fastening portion C2. For this purpose, the tank fastening portion C32 may have the same shape and horizontal position as the module fastening portion C1. That is, the upper tank fastening portion C32 may be configured to be interchangeable with the control fastening portion C2 as a substitute for the module fastening portion C1.

[0085] Furthermore, the fire extinguishing tank 300 may also be provided with a tank fastening portion at its lower end for connecting to the battery module 100. For example, referring to Figure 12, the tank fastening portion may be provided on the lower edge of the fire extinguishing tank 300, as shown by the portion C31, and configured to connect to the battery module 100. For example, if a module fastening portion C1 is formed at the upper end of the battery module 100, as shown in Figure 4, the lower end tank fastening portion C31 of the fire extinguishing tank 300 may be configured to connect to such a module fastening portion C1.

[0086] More specifically, the lower tank fastening portion C31 may be configured to be bolted together with the module fastening portion C1. For example, as shown in the portion indicated as A2' in Figure 13, the lower tank fastening portion C31 and the module fastening portion C1 can be bolted together. Furthermore, such a bolted connection between the module fastening portion C1 and the lower tank fastening portion C31 allows the battery module 100 and the fire extinguishing tank 300 to be fixed to each other.

[0087] Furthermore, the battery module 100 may be configured to be directly connectable to the control module 200. In this case, the module fastening portion C1 may be configured to be connected to the control fastening portion C2 of the control module 200. However, in the battery pack according to the present invention, the tank fastening portion C31 provided on the fire extinguishing tank 300 may have the same shape and horizontal position as the control fastening portion C2 so that it can be connected to such a module fastening portion C1. That is, the lower end tank fastening portion C31 may be configured to be interchangeable with the module fastening portion C1 as a substitute for the control fastening portion C2.

[0088] According to this embodiment of the present invention, a configuration in which a fire extinguishing tank 300 is assembled in the space between a battery module 100 and a control module 200 in a battery pack in which the battery module 100 and the control module 200 are directly coupled can be easily realized. In particular, in this case, there is no need to change the configuration of the conventional battery module 100 or control module 200, and the fire extinguishing tank 300 can be used interchangeably.

[0089] Furthermore, in the case of a battery pack according to one aspect of the present invention, the battery module 100, the fire extinguishing tank 300, and the control module 200 are arranged in a manner in which they are stacked sequentially in an upward direction, and according to the above embodiment, such a stacked state can be stably maintained.

[0090] On the other hand, for reasons such as stable coupling and ease of assembly, the fire extinguishing tank 300 may be equipped with various types of fastenings for mechanically coupling with the battery module 100 and / or the control module 200. For example, the fire extinguishing tank 300 can be mechanically coupled with the battery module 100 and / or the control module 200 by various methods such as hook coupling, insert coupling, and riveting.

[0091] As shown in Figure 13, the fire extinguishing tank 300 may be configured such that the connecting member 330 is interposed between the module connector E1 provided on the battery module 100 and the control connector E2 provided on the control module 200, connecting them. Furthermore, both ends of the connecting member 330 are connected to the module connector E1 and the control connector E2, allowing for the transmission of charging and discharging power and / or electrical signals.

[0092] As a specific example, the connecting member 330 may be configured as a cable that extends long in one direction to allow power or electrical signals to move. The connecting member 330 may also be equipped with tank connectors at both ends of the cable. For example, the connecting member 330 may be equipped with a tank connector at its lower end, as shown by E31 in Figures 12 and 13. Such a lower tank connector E31 can be connected to the module connector E1 of the battery module 100. The connecting member 330 may also be equipped with a tank connector at its upper end, as shown by E32 in Figures 11 and 13. Such an upper tank connector E32 can be connected to the control connector E2 of the control module 200.

[0093] As shown in Figures 3, 11, and 13, the fire extinguishing tank 300 can comprise an internal tank 310 and an external tank 320. The internal tank 310 has an empty space inside, and the fire extinguishing agent can be directly contained in this internal space. In particular, the internal tank 310 may be configured in a sealed form to contain the fire extinguishing agent. For example, the internal tank 310 may be configured to have an airtightness performance of IP rating 55 or higher so that the fire extinguishing liquid does not leak under normal conditions. The external tank 320 may be configured to be larger than the internal tank 310 and to contain the internal tank 310 in its internal space. Therefore, it can be said that the fire extinguishing tank 300 is configured to be at least partially double-layered.

[0094] Furthermore, the internal tank 310 and the external tank 320 may be configured to be at least partially separated. In particular, referring to the embodiment in Figure 13, the internal tank 310 and the external tank 320 may be configured to be at least partially separated in the left-right direction. For example, an empty space may be formed between the side wall of the internal tank 310 and the side wall of the external tank 320, as shown in the portion indicated by A5.

[0095] Such an empty space A5 is formed on one side of the fire extinguishing tank 300 as a connecting member housing section A5, and can accommodate the connecting member 330. The connecting member housing section A5 is provided at a predetermined depth along the height direction (Z-axis direction) of the fire extinguishing tank 300, and the connecting member 330 can be placed inside the connecting member housing section A5.

[0096] In this case, the fire extinguishing agent inside the fire extinguishing tank 300 can be held more safely. In particular, even if an impact is applied from the side of the fire extinguishing tank 300, the double structure of the outer tank 320 and the inner tank 310, and the empty space formed between them, can mitigate the transmission of the impact. Therefore, by preventing damage to the fire extinguishing tank 300, especially the inner tank 310, due to impacts or vibrations, it is possible to prevent abnormal leakage of the fire extinguishing agent.

[0097] In such embodiments of the fire extinguishing tank 300, the connecting member 330 may be located in the space between the inner tank 310 and the outer tank 320. For example, in the embodiment shown in Figure 13, an empty space may be formed between the right side wall of the inner tank 310 and the right side wall of the outer tank 320. Such a separation space can also serve as a connecting member housing where the connecting member 330 can be located. Similarly, an empty space serving as a connecting member housing is formed between the left side wall of the inner tank 310 and the left side wall of the outer tank 320, where the connecting member 330 can be located.

[0098] In this embodiment, the connecting member 330 may not come into direct contact with the fire extinguishing agent inside the fire extinguishing tank 300. Therefore, problems such as corrosion of the connecting member 330 by the fire extinguishing agent or leakage of electric current can be prevented.

[0099] The fire extinguishing tank 300 may be located above the battery module 100, as shown in Figures 1 and 2. Furthermore, the fire extinguishing agent discharged from the fire extinguishing tank 300 may be configured to fall freely towards the battery module 100.

[0100] In other words, the fire extinguishing tank 300 does not require a separate power source to move the extinguishing agent to the battery module 100, and the extinguishing agent can be rapidly injected. For example, referring to the embodiment in Figure 3, as shown by arrow A3, the extinguishing agent is injected to the battery module 100, and this injection process can be carried out naturally by a free-fall method. Therefore, according to this embodiment of the present invention, efficient thermal control becomes possible for battery cells whose temperature has risen due to thermal runaway or the like.

[0101] The fire extinguishing agent may include a liquid substance. That is, the fire extinguishing tank 300 can contain a liquid substance as a fire extinguishing agent in the internal space of the internal tank 310. For example, the fire extinguishing agent may be water, a mixture of water and one or more additives, or a liquid containing these.

[0102] The liquid fire extinguishing agent can be easily introduced into the battery module 100 located at the bottom by a free-fall method. Furthermore, the liquid fire extinguishing agent may lower the temperature of the battery module 100, which can be advantageous in suppressing the fire. In addition, this configuration allows the extinguishing liquid to flow quickly and smoothly into the interior of the battery module 100, particularly to the bottom of the module. Moreover, the liquid fire extinguishing agent can suppress the influx of oxygen into the battery module, especially into the battery where the event occurred.

[0103] Furthermore, the fire extinguishing agent may include at least one of antifreeze, brine, and insulating oil. That is, the fire extinguishing tank 300 may contain antifreeze, brine, and / or insulating oil as a fire extinguishing agent, or may further contain other substances in addition to such liquid substances.

[0104] Such embodiments may be advantageous for outdoor installation of battery packs. In particular, battery packs used in residential ESSs and industrial ESSs can be used outdoors. In this case, as in the above embodiment, if antifreeze, saltwater, or insulating oil is used as the fire extinguishing agent, it can maintain its liquid state without freezing even at low temperatures. Therefore, it is possible to prevent the problem of being unable to put the fire extinguishing agent into the battery module 100 due to freezing. In addition, in this case, it is possible to prevent changes in volume according to the outside temperature and prevent the fire extinguishing tank 300 from freezing and bursting. Furthermore, in the case of insulating oil, it can maintain its insulating resistance performance even when put into the battery module 100. Therefore, such embodiments of the present invention can be more advantageously applied to residential battery packs and residential energy storage systems (ESSs).

[0105] The fire extinguishing tank 300 may be equipped with a rupture member 340. Here, the rupture member 340 can rupture under predetermined conditions. Furthermore, the rupture member 340 may be configured to allow the discharge of fire extinguishing agent when it ruptures.

[0106] For this purpose, the rupture member 340 may be configured to communicate with the internal space of the fire extinguishing tank 300. In particular, if the fire extinguishing tank 300 is equipped with an internal tank 310 and an external tank 320, the rupture member 340 may be configured to communicate with the internal space of the internal tank 310. For example, the internal tank 310 may be formed in a substantially sealed form with an input hole. The rupture member 340 can be inserted into such an input hole to close it. When the rupture member 340 ruptures, the input hole is opened, and the fire extinguishing agent contained in the internal tank 310 can flow out to the outside.

[0107] The rupture member 340 may be located at the bottom of the fire extinguishing tank 300. In this case, when the rupture member 340 ruptures, the fire extinguishing agent can be more smoothly injected into the battery module 100. In particular, the fire extinguishing agent can be injected into the battery module 100 by a free-fall method.

[0108] The rupture member 340 can be provided in at least one unit per fire extinguishing tank 300. For example, as shown in Figure 12, four rupture members 340 can be provided in one fire extinguishing tank 300.

[0109] Furthermore, the bursting member 340 may be configured to rupture in response to conditions such as temperature and pressure. For example, the bursting member 340 may be configured to rupture under conditions of a certain temperature and / or a certain pressure.

[0110] In particular, the rupture member 340 may be configured to rupture due to vent gas. That is, if an event such as thermal runaway occurs in the battery module 100, vent gas may be generated and discharged from the battery module 100. In this case, the rupture member 340 may be made of a material or form that ruptures due to the heat and pressure of such vent gas.

[0111] The bursting member 340 can be implemented as a glass sphere. For example, an insertion hole can be formed in the fire extinguishing tank 300, and the glass sphere can be inserted and fastened into such an insertion hole. Alternatively, the glass sphere can be made to burst upon contact with vent gas, causing the fire extinguishing agent inside the fire extinguishing tank 300 to be ejected to the outside, particularly towards the battery module 100.

[0112] According to this embodiment, the fire extinguishing tank 300 can be easily constructed, and the process of supplying the fire extinguishing agent to the battery module 100 can be made smoother. Furthermore, according to this embodiment, the configuration in which the rupture member 340 is ruptured by the vent gas generated from the battery module 100 can be made easier to implement.

[0113] In addition, the bursting member 340 can be realized in various materials and forms that can burst in response to changes in conditions such as heat and pressure. For example, the bursting member 340 can be realized in the form of vinyl material or injection molding.

[0114] The battery module 100 can have openings that communicate with the internal space. For example, as shown by O1 in Figure 3, the battery module 100 can have openings at its upper end. Such openings O1 can communicate with the internal space of the module case where the battery cells are located.

[0115] Here, the rupture member 340 may be configured such that at least a portion of it is inserted into the opening O1 of the battery module 100. For example, as shown in parts A4 and A4' in Figure 13, the rupture member 340 may be inserted into the internal space of the battery module 100 through the opening O1.

[0116] According to this embodiment of the present invention, the fire extinguishing agent can flow into the internal space of the battery module 100. Therefore, it is possible to respond more effectively to thermal events occurring inside the battery module 100, such as thermal runaway, gas eruption, and fire. Furthermore, battery cells that are the direct targets of thermal events may be located inside the internal space of the battery module 100. Therefore, according to the above embodiment, the fire extinguishing agent can be directly injected into the battery. Consequently, this may be more advantageous in suppressing or preventing fires and other incidents.

[0117] Furthermore, according to this embodiment of the present invention, the bursting member 340, such as a glass sphere, can react to the vent gas even more rapidly. That is, if vent gas is generated in the internal space of the battery module 100, the vent gas can be discharged to the outside of the battery module 100 through the opening O1. In other words, the opening O1 acts as a vent gas outlet in the battery module 100. Moreover, if the opening O1 is located on the upper side of the battery module 100, a larger amount of vent gas can be discharged towards the opening O1 located at the top.

[0118] In this case, if the glass sphere is positioned in the area where the vent gas is discharged, the glass sphere can quickly rupture when the vent gas is generated. Therefore, it may be possible to deploy the extinguishing agent more quickly when a thermal event occurs. In addition, in this case, the extinguishing agent can be directly sprayed into the discharged vent gas, which can lower the temperature of the vent gas and suppress the discharge of external ignition sources such as flames and sparks contained in the vent gas.

[0119] On the other hand, the opening O1 formed in the battery module 100 is not necessarily provided for the purpose of discharging vent gas or the like. For example, the opening O1 provided at the upper end of the battery module 100 as shown in Figure 3 may be provided for the purpose of transporting the battery module 100. That is, the opening O1 may be configured to provide a space in which a worker or transport device can insert their fingers or a gripping tool to grasp the battery module 100 when it is being transported. Alternatively, the opening O1 may be provided as a configuration into which a control module 200 or a fire extinguishing tank 300 can be inserted.

[0120] The fire extinguishing tank 300 can form a vent path configured to allow vent gas to move. That is, when vent gas is discharged from the opening O1 of the battery module 100, a vent path can be formed inside and / or outside the fire extinguishing tank 300 so that such vent gas is discharged to a specific portion. Such a vent path can be formed in the fire extinguishing tank 300 alone or in conjunction with other components. This will be further illustrated with reference to Figures 13, 14, and 15.

[0121] Figure 14 is an enlarged view of a partial cross-section of a battery pack according to one embodiment of the present invention, as seen from the front. For example, Figure 14 can be considered an enlarged view of portion A4 in Figure 13. Figure 15 is a view of a partial cross-section of a battery pack according to one embodiment of the present invention, as seen from above. For example, Figure 15 is a cross-sectional view along the line A6-A6' in Figure 1.

[0122] First, referring to Figure 14, the fire extinguishing tank 300 can be mounted on top of the battery module 100, and the fire extinguishing tank 300 and the battery module 100 can be configured to be partially separated from each other. Furthermore, such a separation space can communicate with the opening O1 of the battery module 100 and function as a vent path. For example, as shown by A7 in Figure 14, an empty space can be formed between the upper end of the battery module 100 and the lower end of the fire extinguishing tank 300. Also, the vent gas discharged through the opening O1 can be discharged to the outside through such a separation space A7 between the battery module 100 and the fire extinguishing tank 300, as shown by arrow A8. That is, in such an embodiment, the separation space A7 between the battery module 100 and the fire extinguishing tank 300 can be provided as a vent path. Furthermore, the vent path formed between the battery module 100 and the fire extinguishing tank 300 is connected to the outside of the battery pack, and the vent gas inside the battery pack can be discharged to the outside.

[0123] Furthermore, a vent path can also be formed inside the fire extinguishing tank 300. In particular, if the fire extinguishing tank 300 includes an internal tank 310 and an external tank 320, an empty space can be formed between the internal tank 310 and the external tank 320. For example, as shown in the area labeled A5 in Figure 13, the internal tank 310 and the external tank 320 are separated, and this space can function as a vent path.

[0124] Furthermore, the separation space A5 between the internal tank 310 and the external tank 320 can communicate with the opening O1 of the battery module 100. In addition, the vent path formed between the internal tank 310 and the external tank 320 is connected to the outside of the battery pack, allowing vent gas from inside the battery pack to be discharged to the outside.

[0125] Furthermore, vent paths can be formed both between the fire extinguishing tank 300 and the battery module 100, as shown by A8 in Figure 14, and between the external tank 320 and the internal tank 310, as shown by A5 in Figure 13. These vent paths can also communicate with each other and be connected to the opening O1 and the external space.

[0126] In this embodiment, the vent gas discharged from inside the battery module 100 toward the opening O1 can break the bursting member 340 located at the opening O1, for example, a glass sphere, allowing the fire extinguishing agent to flow into the inside of the battery module 100. Furthermore, such vent gas can be discharged to the outside of the battery module 100 through the space between the fire extinguishing tank 300 and the battery module 100, and through vent paths formed between the external tank 320 and the internal tank 310, as indicated by arrows A9 and A9' in Figure 15. More specifically, referring to the embodiment in Figure 15, the vent gas can move laterally (X-axis direction) and rearward (+Y-axis direction) within the internal space of the fire extinguishing tank 300 to be discharged to the outside of the battery pack. In this case, the outlet of the vent path in the battery pack may be located at the rear of the battery pack.

[0127] According to this embodiment, the vent gas discharge configuration is provided by the fire extinguishing tank 300 attached to the battery module 100, which allows the vent gas inside the battery module 100 to be smoothly discharged to the outside, thereby preventing explosions caused by an increase in the internal pressure of the battery module 100.

[0128] Furthermore, according to this embodiment, the direction of the vent gas discharged from the battery module 100 can be effectively controlled by the fire extinguishing tank 300. In particular, in the above embodiment, the vent gas can be guided to flow toward the rupture member 340. Therefore, the rupture member 340 can be rapidly ruptured when vent gas is generated. Moreover, in the above embodiment, the vent gas can be moved toward the rear side of the battery pack, as shown in Figure 15. Therefore, direct exposure of the vent gas to the user or other components located toward the front side of the battery pack can be prevented.

[0129] The battery module 100 may be included in two or more units within the battery pack. In this case, the fire extinguishing tank 300 may be configured to allow separate supply of fire extinguishing agent to each of the two or more battery modules 100. This will be explained in more detail with further reference to Figure 16.

[0130] Figure 16 is a schematic diagram showing a partial cross-sectional configuration of a battery pack according to one embodiment of the present invention, viewed from the side. For example, Figure 16 can be described as a cross-sectional view along the line A10-A10' in Figure 1.

[0131] Referring to Figure 16, etc., a battery pack may include two or more battery modules 100. Furthermore, the fire extinguishing tank 300 may be configured to be assembled with two or more battery modules 100. In this case, the fire extinguishing tank 300 may include at least two bursting members 340, which can be spaced apart in the stacking direction of the battery modules 100. Additionally, multiple bursting members 340 can be inserted into openings O1 of different battery modules 100. For example, in the embodiment of Figure 16, a first glass sphere G1 may be inserted into the opening O1 of the first module M1, and a second glass sphere G2 may be inserted into the opening O1 of the second module M2.

[0132] Furthermore, in this configuration, each glass sphere G1 and G2 can be configured to supply fire extinguishing agent to different battery modules 100;M1 and M2. For example, if vent gas or flames are generated from the first module M1, the first glass sphere G1 will break, allowing the fire extinguishing agent from the fire extinguishing tank 300 to be injected into the first module M1, as indicated by arrow D1. As another example, if vent gas or flames are generated from the second module M2, the second glass sphere G2 will break, allowing the fire extinguishing agent from the fire extinguishing tank 300 to be injected into the second module M2, as indicated by arrow D2.

[0133] According to this embodiment of the present invention, in a battery pack containing multiple battery modules 100, it is possible to directly supply fire extinguishing agent to each battery module 100. In particular, according to the above embodiment, fire extinguishing agent can be supplied only to the battery module 100 in which the event occurred. Therefore, the other battery modules 100 in which the fire extinguishing agent has not been supplied can continue to operate. For example, if an event occurs in the first module M1, the first glass sphere G1 breaks, and fire extinguishing agent can be supplied only to the inside of the first module M1. At this time, the second glass sphere G2 does not break, so fire extinguishing agent is not supplied to the inside of the second module M2, and the second module M2 can continue to be used. Therefore, even if a problem occurs in some of the battery modules 100, the problem of the entire battery pack becoming unusable can be prevented.

[0134] On the other hand, while Figure 16 shows one rupture member 340 inserted into one battery module 100, it is also possible to insert two or more rupture members 340 into one battery module 100. For example, as shown in Figure 12, the fire extinguishing tank 300 can be equipped with two or more rupture members 340 in both the front-to-back direction and the left-to-right direction. In this case, both of the two rupture members 340 arranged in the left-to-right direction can be inserted into one battery module 100.

[0135] In embodiments in which the battery pack includes multiple battery modules 100, vent paths may be configured to separate each battery module 100. For example, a protrusion can be formed between the first module M1 and the second module M2, as shown by W1 in Figure 16. Such a protrusion is provided in an upwardly convex shape at the upper end of the battery module 100 and can contact the lower end of the fire extinguishing tank 300.

[0136] In this case, the protrusion can prevent vent gas from flowing towards other battery modules 100. For example, if vent gas is ejected from the first module M1 through the opening O1, the vent gas may flow in the left-right direction (X-axis direction) along the vent path formed between the top of the first module M1 and the bottom of the fire extinguishing tank 300, as shown in Figure 15. However, the vent gas discharged from the first module M1 may not move towards the second module M2 due to the protrusion W1 formed between the first module M1 and the second module M2. In other words, the protrusion W1 formed between the first module M1 and the second module M2 can function as a partition that blocks the movement of vent gas between them. In particular, such a central protrusion W1 may be made of an elastic material such as rubber, silicone, or urethane to ensure sealing performance.

[0137] Such a protrusion W1 may be formed to extend horizontally, specifically in a direction perpendicular to the stacking direction of the battery modules 100 (the X-axis direction). For example, in the diagram shown in Figure 15, the protrusion acting as a partition wall may be located between the first module M1 and the second module M2, as indicated by W2, and may extend horizontally (in the X-axis direction).

[0138] According to this embodiment of the present invention, the venting direction of the vent gas can be controlled more reliably. Furthermore, in this case, it is possible to block the flow of vent gas discharged from some battery modules 100 into other battery modules 100, thereby preventing problems such as the propagation of thermal runaway between modules. In addition, according to the above embodiment, it is possible to prevent the bursting member 340 from being damaged by vent gas discharged from other battery modules 100, thereby preventing the fire extinguishing agent from being injected into the interior of a normal battery module 100.

[0139] Furthermore, multiple battery modules 100 may also have partitions formed on their external sides. For example, as shown by W3 in Figure 16, the upper front edge of the first module M1 located on the front side can be provided with a protruding portion (forward protrusion) as a partition configuration that contacts the fire extinguishing tank 200 and seals the vent path. Similarly, as shown by W3' in Figure 16, the upper rear edge of the second module M2 located on the rear side can also be provided with a protruding portion (rear protrusion) as a partition configuration that contacts the fire extinguishing tank 200 and seals the vent path. These forward and rear protrusions W3, W3 may be made of elastic materials such as rubber, silicone, or urethane to ensure sealing performance.

[0140] According to this embodiment of the present invention, the sealing force of the vent path formed between the battery module 100 and the fire extinguishing tank 300 is ensured so that the vent gas can be discharged only in the intended direction. For example, with such a partition configuration, the vent gas can move only in the directions indicated by arrows A9 and A9' in Figure 15, and is prevented from moving in other directions, such as towards the front of the battery pack.

[0141] The fire extinguishing tank 300 may further include a cover portion configured to protrude toward the battery module 100 at the edge that connects to the battery module 100. For example, referring to the implementation drawings in Figures 12 and 16, as shown in the portion indicated by A11, a cover portion can be formed at the lower end of at least a part of the edge of the fire extinguishing tank 300, extending further downward than the upper end of the battery module 100. Furthermore, such a cover portion may be configured to surround the outside of the battery module 100 when the fire extinguishing tank 300 is attached to the battery module 100.

[0142] According to this embodiment of the present invention, the coupling between the fire extinguishing tank 300 and the battery module 100 can be further improved. Furthermore, according to this embodiment, when the fire extinguishing agent is sprayed from the fire extinguishing tank 300, the fire extinguishing agent is properly supplied to the inside of the battery module 100, while preventing the fire extinguishing agent from leaking out of the battery pack.

[0143] Furthermore, according to the above embodiment, it is possible to prevent vent gas from leaking in unintended directions. For example, the cover portion can be formed at three corners of the lower edge of the fire extinguishing tank 300: the front, left, and right corners. In this case, the vent gas that flows between the fire extinguishing tank 300 and the battery module 100 is guided to flow out to the rear side of the battery pack, preventing it from leaking to the front, left, or right.

[0144] The battery pack according to the present invention may be configured such that the fire extinguishing tank 300, battery module 100, control module 200, etc., can be connected and fixed to the wall of a building such as a house or office building. For example, the fire extinguishing tank 300 may have fixing holes formed on its rear surface, and the fire extinguishing tank 300 may be configured to be fixed to the wall through such fixing holes. Alternatively, the battery pack according to the present invention may further include a fixing unit configured to be connected to a wall or the like. Such a fixing unit can be fastened to components such as the fire extinguishing tank 300 and battery module 100, thereby fixing the battery pack to the wall.

[0145] The energy storage system according to the present invention includes one or more of the battery packs described above. Furthermore, the energy storage system according to the present invention may further include general components included in an energy storage system, in addition to such battery packs. In particular, the energy storage system according to the present invention may be a residential (building) energy storage system used for storing energy in houses, buildings, etc.

[0146] Through the various embodiments described above, it is possible to provide a battery pack and an energy storage system including the same that can enhance the convenience of installation work for the electrical connection between the battery module 100 and the control module 200.

[0147] As described above, the present invention has been explained with limited embodiments and drawings, but it goes without saying that the present invention is not limited thereto, and various modifications and variations are possible within the equivalent scope of the technical concept of the present invention and the claims described below by persons with ordinary skill in the art to which the present invention belongs. [Explanation of Symbols]

[0148] 10,100 Battery Modules 200, 300 fire extinguishing tanks 200 control modules 310 Internal Tank 320 External Tank 330 Connecting Member 340 Bursting member 400, 402, 405 Side Covers 500 sealing member A3, A8, A9, D1, D2 (arrows) A5, A7 Separate space C1 Module fastening section C2 Control fastening section C31 Lower end tank fastening section C32 Upper end tank fastening section E1 Module Connector E2 control connector E31 Lower Tank Connector E32 Upper Tank Connector ESS Energy Storage System G1 First glass sphere G2 Second glass sphere M1 Module 1 M2 Module 2 O1 opening R slide rail S fastening member W1 Central Protrusion W3 rear protrusion

Claims

1. A battery module comprising one or more battery cells, A control module connected to the aforementioned battery module and configured to manage the aforementioned battery module, A fire extinguishing tank containing a fire extinguishing agent and coupled to the battery module and the control module, A side cover attached to one side of the aforementioned fire extinguishing tank, In a battery pack comprising, The fire extinguishing tank includes a connecting member that electrically connects the battery module and the control module. One side of the fire extinguishing tank is provided with a connecting member housing section that accommodates the connecting member and is located at a predetermined depth along the height direction of the fire extinguishing tank. The battery pack is characterized in that the side cover is configured to expose at least one side of the fire extinguishing tank when the connecting member is attached.

2. The aforementioned side cover is The battery pack according to claim 1, characterized in that it is detachably attached to one side of the fire extinguishing tank.

3. The aforementioned side cover is The battery pack according to claim 1, characterized in that it is rotatably attached to one side of the fire extinguishing tank.

4. The aforementioned side cover is The battery pack according to claim 1, characterized in that it is mounted so as to be at least partially slidable that one side of the fire extinguishing tank is exposed to the outside.

5. The battery pack according to claim 1, characterized in that it includes a sealing member disposed between one side of the fire extinguishing tank and the side cover in order to seal one side of the fire extinguishing tank.

6. The aforementioned side cover is The battery pack according to claim 1, characterized in that it is attached to one of the left or right sides of the fire extinguishing tank.

7. The upper and lower ends of the connecting member are The battery pack according to claim 1, characterized in that a tank connector is provided for connecting the battery module and the control module.

8. An energy storage system characterized by including a battery pack according to any one of claims 1 to 7.

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