Battery rack

Abstract

A battery rack according to an embodiment of the present invention may include a plurality of battery modules stacked in a vertical direction, each having a connecting rod protruding forward, and a flexible bus bar connected to each connecting rod of two adjacent battery modules among the plurality of battery modules so as to be movable forward and backward.

Description

[Technical Field]

[0001] The present invention relates to a battery rack.

[0002] This application claims priority based on Korean Patent Application No. 10-2022-0172671, filed on December 12, 2022, the entire contents of which are incorporated herein by reference in their entirety in the specification and drawings of that application. [Background technology]

[0003] Currently, commercially available secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium secondary batteries. In particular, lithium secondary batteries are attracting attention due to their advantages of almost no memory effect compared to nickel-based secondary batteries, free charging and discharging, extremely low self-discharge rate, and high energy density.

[0004] Such lithium secondary batteries mainly use lithium-based oxides and carbon materials as positive and negative electrode active materials, respectively. The lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate, each coated with the positive and negative electrode active materials, are arranged with a separator sandwiched therebetween, and an exterior material, i.e., a battery case, that hermetically houses the electrode assembly together with an electrolyte.

[0005] Generally, lithium secondary batteries can be classified into can-type secondary batteries in which an electrode assembly is housed in a metal can and pouch-type secondary batteries in which an electrode assembly is housed in a pouch made of an aluminum laminate sheet, depending on the shape of the exterior material.

[0006] Although such secondary batteries may be used alone, they are usually configured in a form in which a plurality of secondary batteries are electrically connected to each other in series and / or parallel. In particular, a plurality of secondary batteries may be electrically connected to each other and housed inside a single module case to form a single battery module. The battery module may be used alone, or two or more may be electrically connected to each other in series and / or parallel to form a higher-level device such as a battery pack.

[0007] Recently, as issues such as power shortages and environmentally friendly energy have come to the fore, energy storage systems (ESSs) for storing generated electricity have been gaining attention. For example, smart grid systems have been proposed as a solution for regulating power supply and demand. The amount of electricity consumed by consumers is not constant but can fluctuate frequently. A typical example is the sudden increase in power consumption due to the use of air conditioners in the afternoon during summer, followed by a sudden decrease in power consumption at night. While power consumption fluctuates frequently, it is practically difficult to match power consumption to the demand, even if power production is adjusted to some extent. This can lead to an imbalance between power supply and consumption, resulting in either an oversupply or a shortage. Smart grid systems can flexibly store and adjust power to address these issues. The smart grid system is based on the concept of storing power in areas where surplus power is generated and supplying the stored power to areas where power shortages occur. One of the key components for building such a smart grid system is an energy storage system for storing electric power. In addition, as electric vehicles have recently become commercially available, power storage systems are also being applied to facilities for charging electric vehicles, such as charging stations.

[0008] Such a power storage system is typically configured to include multiple battery containers to ensure a large charge / discharge capacity, and each battery container may include multiple battery racks, each of which may include multiple battery modules.

[0009] In conventional battery containers, busbar connections between battery modules are often performed after transportation or movement is completed. This is because if the busbars are pre-assembled, there is a risk that the busbars may be damaged during transportation or movement of the battery container, causing a thermal event. However, this requires labor and time from workers after transportation or movement of the battery container. Summary of the Invention [Problem to be solved by the invention]

[0010] The present invention is directed to solving these and other problems.

[0011] Another object of the present invention is to provide a battery rack that can be transported or moved with bus bars connected between battery modules.

[0012] It is yet another object of the present invention to provide a battery rack including bus bars that can offset or absorb impacts that occur during transportation or movement of the battery rack.

[0013] It is yet another object of the present invention to provide a battery rack capable of insulating terminals of battery modules from bus bars while the battery rack is being transported or moved.

[0014] Another object of the present invention is to provide a battery rack that allows easy electrical connection between terminals of battery modules and bus bars after transportation or movement of the battery rack is completed. [Means for solving the problem]

[0015] To achieve the above object, a battery rack according to one embodiment of the present invention may include a plurality of battery modules stacked in the vertical direction, each having a connecting rod protruding forward, and a bus bar that is connected to each of the connecting rods of two adjacent battery modules among the plurality of battery modules so as to be movable in the front-rear direction, the bus bar being made of a metal material and configured to be flexible.

[0016] The bus bar may also include a plurality of first grooves formed in a direction perpendicular to the longitudinal direction of the bus bar.

[0017] The bus bar may further include a plurality of second grooves formed in a direction perpendicular to the first grooves and extending along the longitudinal direction of the bus bar.

[0018] Also, a plurality of the first grooves may be formed on the front surface of the bus bar.

[0019] The bus bar may further include a plurality of third grooves formed on a rear surface of the bus bar in a direction perpendicular to a longitudinal direction of the bus bar.

[0020] The battery rack may further include a coil spring that provides a restoring force that biases the bus bar rearward.

[0021] The battery module may also include a terminal provided on an outer surface of the battery module and adjacent to the connecting rod.

[0022] Moreover, the bus bar may contact the terminal and be electrically connected to the terminal.

[0023] The connecting rod may have a screw thread formed thereon, and the battery module may further include a nut positioned in front of the coil spring and coupled to the screw thread.

[0024] The device may further include a support member positioned between the nut and the coil spring.

[0025] Additionally, the support member may be a disc spring that provides a restoring force that biases the coil spring rearward.

[0026] The battery module may include a terminal formed on an outer surface of the battery module and adjacent to the connecting rod.

[0027] The battery rack may further include an insulating sheet positioned between the terminal and the bus bar.

[0028] The insulating sheet may also include a first hole through which the connecting rod passes and a second hole adjacent to the first hole.

[0029] To achieve the above object, a battery container according to the present invention includes a battery rack according to the present invention.

[0030] To achieve the above object, the power storage system according to the present invention includes the battery rack according to the present invention. [Effects of the Invention]

[0031] According to at least one embodiment of the present invention, a battery rack can be provided that can be transported or moved with bus bars between battery modules connected together.

[0032] According to at least one embodiment of the present invention, a battery rack including a bus bar capable of offsetting or absorbing shocks that occur during transportation or movement of the battery rack can be provided.

[0033] According to at least one embodiment of the present invention, a battery rack can be provided that can insulate terminals of battery modules and bus bars while the battery rack is being transported or moved.

[0034] According to at least one embodiment of the present invention, it is possible to provide a battery rack that allows easy electrical connection between terminals of battery modules and bus bars after transportation or movement of the battery rack is completed.

[0035] In addition, the present invention has various other effects, which will be explained in each embodiment, and explanations of effects that can be easily inferred by those skilled in the art will be omitted.

[0036] The following drawings attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention, serve to further understand the technical concept of the present invention, so the present invention should not be interpreted as being limited to the matters described in the drawings. [Brief explanation of the drawings]

[0037] [Figure 1] FIG. 1 is a perspective view showing a battery container according to an embodiment of the present invention. [Figure 2] FIG. 2 is an enlarged view of a portion of the battery rack according to one embodiment of the present invention. [Figure 3] 1A and 1B are diagrams illustrating a bus bar according to a first embodiment of the present invention. [Figure 4] FIG. 6 is a diagram showing a bus bar according to a second embodiment of the present invention. [Figure 5] FIG. 10 is a diagram showing a bus bar according to a third embodiment of the present invention. [Figure 6] FIG. 10 is a diagram showing a bus bar according to a fourth embodiment of the present invention. [Figure 7] FIG. 10 is a diagram showing a bus bar according to a fifth embodiment of the present invention. [Figure 8] FIG. 10 is a diagram showing a bus bar according to a sixth embodiment of the present invention. [Figure 9] FIG. 10 is a diagram showing a bus bar according to a seventh embodiment of the present invention. [Figure 10] FIG. 13 is a diagram showing a bus bar according to an eighth embodiment of the present invention. [Figure 11] FIG. 13 is a diagram showing a bus bar according to a ninth embodiment of the present invention. [Figure 12] FIG. 2 is an exploded perspective view of a partial configuration of a battery rack according to one embodiment of the present invention. [Figure 13] FIG. 3 is a diagram schematically illustrating a part of the cross-sectional configuration taken along line AA' in FIG. 2. [Figure 14] 1A and 1B illustrate a support member according to an embodiment of the present invention. [Figure 15] 1 is a diagram showing an insulating sheet according to an embodiment of the present invention; [Figure 16] FIG. 1 is a diagram illustrating a partial configuration of a battery rack according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0038] 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 the specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted as having meanings and concepts corresponding to the technical ideas of the present invention, in accordance with the principle that the inventors themselves can appropriately define the concepts of terms in order to best explain the invention.

[0039] Therefore, it should be understood that the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiment of the present invention and do not represent the entire technical idea of ​​the present invention, and that there may be various equivalents and modifications that can be substituted for them at the time of this application.

[0040] Fig. 1 is a perspective view showing a battery container 2000 of the present invention. Fig. 2 is an enlarged view of a portion of a battery rack 1000 of the present invention. Referring to Figs. 1 and 2, a battery rack 1000 according to one embodiment of the present invention may include a plurality of battery modules 200 and bus bars 100.

[0041] To increase capacity and / or output, a plurality of battery modules 200 may be included in the battery rack 1000. Such a plurality of battery modules 200 may be electrically connected in series and / or in parallel by connecting members such as bus bars 100 or cables.

[0042] At least some of the plurality of battery modules 200 may be stacked vertically to form the battery rack 1000. That is, the battery rack 1000 may be configured to be formed by stacking two or more battery modules 200 vertically, i.e., in the Z-axis direction. For example, one battery rack 1000 may be formed by stacking 13 battery modules 200 vertically.

[0043] Furthermore, the battery rack 1000 may be configured to be arranged in multiple units in the horizontal direction. That is, the multiple battery modules 200 may be divided into multiple groups, with each group forming a separate battery rack 1000. The multiple battery racks 1000 may be arranged in the horizontal direction. For example, referring to FIG. 1 , the battery container 2000 may include eight battery racks 1000, and the eight battery racks 1000 may be arranged at a predetermined distance in the left-right direction, i.e., the X-axis direction. In this case, each battery rack 1000 may include 12 or 13 battery modules 200. However, the number of stacked battery modules 200 and the number of battery racks 1000 arranged in the horizontal direction may be variously set depending on various conditions or situations, such as the specifications and installation purposes of the battery rack 1000, the specifications and installation purposes of the battery container 2000, and the specifications, characteristics, and type of the battery modules 200.

[0044] The plurality of battery modules 200 may each be configured to include a connecting rod 210 protruding forward. One battery module 200 may include two connecting rods 210. The connecting rods 210 may be configured to correspond to the positive terminal 220 (see FIG. 2 ) and the negative terminal 220 of the battery module. For example, the connecting rods 210 may be fastening members such as bolts. Each battery module 200 may be configured to be physically or electrically connected to an adjacent battery module 200 via the connecting rods 210. The bus bar 100 may be coupled to each connecting rod 210 of two adjacent battery modules 200 among the plurality of battery modules 200. Adjacent battery modules 200 may refer to the two battery modules 200 that are most adjacent in the vertical direction, i.e., in the stacking direction of the plurality of battery modules.

[0045] Furthermore, the bus bar 100 may be configured to be coupled to each of the coupling rods 210 of two adjacent battery modules 200 among the plurality of battery modules 200 so as to be movable in the front-to-rear direction, i.e., the Y-axis direction. Specifically, two holes 101 may be formed in the bus bar 100, and the two coupling rods 210 may pass through the holes 101, respectively. The bus bar 100 may physically couple the two coupling rods 210. The bus bar 100 may then move in the front-to-rear direction along the coupling rods 210 through the holes 101. The plurality of battery modules 200 may be coupled to each other in the stacking direction by such bus bars 100.

[0046] The bus bar 100 may also be made of a metal material, thereby enabling the bus bar 100 to electrically connect adjacent battery modules 200 together.

[0047] Busbar 100 may also be configured to be flexible, allowing it to be compressed, stretched, or warped in various directions and return to its original state.

[0048] Conventionally, the transportation, delivery, or movement of battery racks or battery containers has been carried out without connecting the battery modules together. This was because, if the battery modules were transported, delivered, or moved while connected, the bus bars could be damaged by vibration or impact, which could result in a risk of fire or flames. Therefore, after the transportation, delivery, or movement of the battery rack or battery container has been completed, an installation process for connecting the battery modules with the bus bars has been required.

[0049] According to this configuration of the present invention, the plurality of battery modules 200 constituting the battery rack 1000 can be transported, delivered, or moved while being connected by the bus bar 100. Because the bus bar 100 is configured to be flexible, the bus bar 100 can absorb vibrations and shocks that occur during the transportation, delivery, or movement of the battery rack 1000. In particular, because the bus bar 100 is connected to the connecting rod 210 so as to be movable in the front-rear direction, the bus bar 100 can easily absorb or offset vibrations or shocks in the front-rear direction.

[0050] Furthermore, this configuration of the present invention can improve the economy of transportation, delivery, or movement of the battery rack 1000. After transportation, delivery, or movement of the battery rack 1000 is completed, the installation process of connecting the battery modules 200 with the bus bars 100 is not required, thereby saving labor and time for workers.

[0051] 3 is a diagram showing a bus bar 100 according to a first embodiment of the present invention. Fig. 3a is a perspective view of the bus bar 100, Fig. 3b is a side view of the bus bar 100, and Fig. 3c is a front view of the bus bar. Referring to Figs. 2 and 3, the bus bar 100 of the battery rack 1000 according to one embodiment of the present invention may include a plurality of first grooves 110.

[0052] The busbar 100 may be configured to extend in the stacking direction of the plurality of battery modules 200, i.e., the Z-axis direction. The busbar 100 may have a flat bar shape. The busbar 100 may include a first groove 110 formed in a direction perpendicular to the longitudinal direction of the busbar 100. The first groove 110 may be formed on the front surface of the busbar 100. Alternatively, the first groove 110 may be formed so that the direction of formation of the first groove 110 is perpendicular to the longitudinal direction of the busbar 100. A plurality of first grooves 110 may be formed. The plurality of first grooves 110 may be arranged along the longitudinal direction of the busbar 100. The plurality of first grooves 110 may be disposed between two holes 101. In particular, the plurality of first grooves 110 may be disposed at equal intervals. The depths d1 of the plurality of first grooves 110 may be the same. The widths w1 of the plurality of first grooves 110 may be the same. In addition, the lengths l1 of the first grooves 110 may be the same. In this case, the cross section of the first grooves 110 in the longitudinal direction of the bus bar 100 may be rectangular.

[0053] This configuration of the present invention improves the flexibility of the bus bar 100. As a result, the bus bar 100 can absorb vibrations and shocks that occur during transportation, delivery, or movement of the battery rack 1000. In particular, referring to FIG. 3B, when an impact is applied to the bus bar 100 in the y-axis direction, the bus bar 100 can easily absorb or offset the impact and warp. In particular, referring to FIG. 3C, when an impact is applied to the bus bar 100 in the x-axis direction, the bus bar 100 can easily absorb or offset the impact and warp.

[0054] Furthermore, according to this configuration of the present invention, multiple first grooves 110 are formed with the same shape, depth d1, width w1, and length l1, and are arranged at equal intervals, so that the flexibility of busbar 100 can be made uniform.

[0055] 4 is a diagram showing a bus bar 100 according to a second embodiment of the present invention. Referring to FIGS. 2 and 4, the bus bar 100 of the battery rack 1000 according to an embodiment of the present invention may include a plurality of first grooves 110.

[0056] 2 and 4, the bus bar 100 of the battery rack 1000 according to an embodiment of the present invention may include a first groove having a curved surface. In addition, the cross section of the first groove 110 in the longitudinal direction of the bus bar 100 may have a curved shape with a rounded portion 111.

[0057] This configuration of the present invention improves the durability of busbar 100. As a result, even if busbar 100 repeatedly warps and restores, cracks c do not occur, and the shape of the busbar is stably maintained.

[0058] 5 is a diagram showing a bus bar 100 according to a third embodiment of the present invention. Referring to FIGS. 2 and 5, the bus bar 100 of the battery rack 1000 according to an embodiment of the present invention may include a plurality of first grooves 110.

[0059] The plurality of first grooves 110 may be arranged along the longitudinal direction of the busbar 100. In this case, the intervals at which the plurality of first grooves 110 are arranged may not be uniform. For example, the intervals at which the first grooves 110 are arranged in the central portion 103 of the busbar 100 may be smaller than the intervals at which the first grooves 110 are arranged in the region 102 adjacent to the hole 101 of the busbar 100 or in the peripheral portion 102. Alternatively, for example, the density of the first grooves 110 arranged in the central portion 103 of the busbar 100 may be higher than the density of the first grooves 110 arranged in the peripheral portion 102 of the busbar 100.

[0060] When an impact causes busbar 100 to warp, the amount of deformation in central portion 103 of busbar 100 may be greater than the amount of deformation in portion 102 adjacent to hole 101 or peripheral portion 102 of busbar 100. According to this configuration of the present invention, central portion 103 of busbar 100 is more easily deformed than peripheral portion 102, and busbar 100 can effectively absorb or offset the impact.

[0061] 6 is a diagram showing a bus bar 100 according to a fourth embodiment of the present invention. Referring to FIGS. 2 and 6, the bus bar 100 of the battery rack 1000 according to an embodiment of the present invention may include a plurality of first grooves 110.

[0062] The plurality of first grooves 110 may be arranged along the longitudinal direction of the bus bar 100. In this case, the depths d1 and d2 at which the plurality of first grooves 110 are formed may not be the same.

[0063] For example, the depth d2 of the first grooves 110 arranged in the central portion 103 of the busbar 100 may be formed to be deeper than the depth d1 of the first grooves 110 arranged in the peripheral portion 102 of the busbar 100.

[0064] When an impact causes busbar 100 to warp, the amount of deformation in central portion 103 of busbar 100 may be greater than the amount of deformation in peripheral portion 102 of busbar 100. According to this configuration of the present invention, central portion 103 of busbar 100 is more easily deformed than peripheral portion 102, and busbar 100 can effectively absorb or offset the impact.

[0065] 7 is a diagram showing a bus bar according to a fifth embodiment of the present invention. Referring to FIGS. 2 and 7, the bus bar 100 of the battery rack 1000 according to an embodiment of the present invention may include a plurality of first grooves.

[0066] The plurality of first grooves 110 may be arranged along the longitudinal direction of the bus bar 100. In this case, the widths w1 and w2 at which the plurality of first grooves 110 are formed may not be the same.

[0067] For example, the width w2 of the first grooves 110 arranged in the central portion 103 of the busbar 100 may be formed to be larger than the width w1 of the first grooves 110 arranged in the peripheral portion 102 of the busbar 100.

[0068] When an impact causes busbar 100 to warp, the amount of deformation in central portion 103 of busbar 100 may be greater than the amount of deformation in peripheral portion 102 of busbar 100. According to this configuration of the present invention, central portion 103 of busbar 100 is more easily deformed than peripheral portion 102, and busbar 100 can effectively absorb or offset the impact.

[0069] 8 is a diagram showing a bus bar 100 according to a sixth embodiment of the present invention. Referring to FIGS. 2 and 8, the bus bar 100 of the battery rack 1000 according to an embodiment of the present invention may include a first groove 110 and a second groove 120.

[0070] The second grooves 120 may be formed in a direction perpendicular to the plurality of first grooves 110. The second grooves 120 may extend along the longitudinal direction of the busbar 100. A plurality of second grooves 120 may be formed. Alternatively, the second grooves 120 may be formed long along the longitudinal direction of the busbar 100, i.e., a direction perpendicular to the first grooves 110, i.e., the Z-axis direction. Alternatively, the second grooves 120 may be formed so as to be perpendicular to the first grooves 110.

[0071] The second groove 120 may be formed on the same surface as the surface on which the first groove 110 is formed. For example, the first groove 110 and the second groove 120 may be formed on the front surface of the busbar 100.

[0072] The plurality of second grooves 120 may be arranged in a direction perpendicular to the longitudinal direction of the busbar 100. The plurality of second grooves 120 may be disposed between two holes 101. In particular, the plurality of second grooves 120 may be disposed at equal intervals. The plurality of second grooves 120 may be formed to have the same depth. The plurality of second grooves 120 may be formed to have the same width. The plurality of second grooves 120 may be formed to have the same length. In this case, the cross section of the second groove 120 in a direction perpendicular to the longitudinal direction of the busbar 100 may be rectangular. The first grooves 110 and the second grooves 120 may form a lattice-like groove.

[0073] According to this configuration of the present invention, the flexibility of the bus bar 100 against shock or vibration in the X-axis direction can be improved, and the bus bar 100 can more effectively absorb or offset vibration or shock that occurs during transportation, delivery, or movement of the battery rack 1000.

[0074] Furthermore, according to this configuration of the present invention, multiple second grooves 120 are formed with the same shape, depth, width, and length and are arranged at equal intervals, so that the flexibility of bus bar 100 can be made uniform.

[0075] 9 is a diagram showing a bus bar 100 according to a seventh embodiment of the present invention. Referring to FIGS. 2 and 9, the bus bar 100 of the battery rack 1000 according to an embodiment of the present invention may include a first groove 110 and a second groove 120.

[0076] The second grooves 120 may be formed between the first grooves 110. Alternatively, the second grooves 120 may be formed in the central portion 104 of the busbar 100, and the first grooves 110 may be formed in the peripheral portion 105 of the busbar 100. The first grooves 110 and the second grooves 120 do not have to be perpendicular to each other. Alternatively, the second grooves 120 may be disposed between the first grooves 110.

[0077] According to this configuration of the present invention, the flexibility of busbar 100 against shock or vibration in the X-axis direction can be improved.

[0078] Furthermore, with this configuration of the present invention, weakening of the rigidity of busbar 100 due to the inclusion of second groove 120 can be minimized.

[0079] 10 is a diagram showing a bus bar 100 according to an eighth embodiment of the present invention. Fig. 10a is a front perspective view of the bus bar 100, and Fig. 10b is a rear perspective view of the bus bar 100. Referring to Figs. 2 and 10, the bus bar 100 of the battery rack 1000 according to an embodiment of the present invention may include a first groove 110 and a second groove 120.

[0080] The first groove 110 and the second groove 120 may be formed on different surfaces of the busbar 100. For example, if the first groove 110 is formed on the front surface of the busbar 100, the second groove 120 may be formed on the rear surface of the busbar.

[0081] According to this configuration of the present invention, the flexibility of busbar 100 against shock or vibration in the X-axis direction can be improved.

[0082] Furthermore, with this configuration of the present invention, the rigidity of busbar 100 can be improved compared to when first groove 110 and second groove 120 are formed on the same surface of busbar 100.

[0083] 11 is a diagram showing a bus bar 100 according to a ninth embodiment of the present invention. Referring to FIGS. 2 and 11, the bus bar 100 of the battery rack 1000 according to an embodiment of the present invention may include a first groove 110 and a third groove 130.

[0084] The third grooves 130 may include third grooves 130 formed in a direction perpendicular to the longitudinal direction of the busbar 100. The third grooves 130 may be formed on the rear surface of the busbar 100. Alternatively, the direction in which the third grooves 130 are formed may be perpendicular to the longitudinal direction of the busbar 100. A plurality of third grooves 130 may be formed. Such a plurality of third grooves 130 may be arranged along the longitudinal direction of the busbar 100. Such a plurality of third grooves 130 may be disposed between two holes 101. In particular, the plurality of third grooves 130 may be disposed at equal intervals. The depth, width, and length of the plurality of third grooves 130 may be the same. The depth, width, and length of the plurality of third grooves 130 may be the same as that of the first groove 110. In this case, the cross section of the third groove 130 in the longitudinal direction of the busbar 100 may be rectangular.

[0085] The first groove 110 and the third groove 130 may be formed on different surfaces of the busbar 100. For example, the first groove 110 may be formed on the front surface of the busbar 100, and the third groove 130 may be formed on the rear surface of the busbar 100.

[0086] The plurality of first grooves 110 and the plurality of third grooves 130 may be arranged alternately in the longitudinal direction of the busbar 100. Furthermore, the plurality of first grooves 110 and the plurality of third grooves 130 may be arranged alternately at equal intervals in the longitudinal direction of the busbar 100.

[0087] According to this configuration of the present invention, the flexibility of busbar 100 is significantly improved compared to when busbar 100 includes only first groove 110 or only third groove 130.

[0088] FIG. 12 is an exploded view of a portion of the battery rack 1000 of the present invention. FIG. 13 is a schematic view of a portion of the cross-sectional configuration taken along line A-A'. Referring to FIGS. 12 and 13, the battery rack 1000 according to one embodiment of the present invention may include a coil spring 300 that provides a restoring force that urges the bus bar 100 rearward. The coil spring 300 may be sandwiched between the connecting rods 210. The coil spring 300 may be coupled to the connecting rods 210 in a compressed state. The rear of the coil spring 300 may contact the front of the bus bar 100. The restoring force of the compressed coil spring 300 may be configured to urge the bus bar 100 rearward. Alternatively, the restoring force of the compressed coil spring 300 may be configured to urge the bus bar 100 in the -Y-axis direction.

[0089] According to this configuration of the present invention, the coil spring 300 can stably support the bus bar 100. Even if the bus bar 100 moves back and forth along the connecting rod 210 due to vibration or movement of the battery rack 1000, the coil spring 300 can restore the position of the bus bar 100. As a result, the bus bar 100 can maintain a stable connection state while absorbing or canceling out vibrations or impacts.

[0090] 12 and 13, a screw thread may be formed on the connecting rod 210 of the battery rack 1000 according to an embodiment of the present invention. The screw thread may be formed along the protruding direction of the connecting rod 210. In this case, the connecting rod 210 may be a fastener or a bolt. At least a portion of the connecting rod 210 may be located inside the battery module 200. For example, the connecting rod 210 may have a head 211 at the rear, and the head 211 may be located inside the battery module 200 and fixed or connected thereto.

[0091] The battery rack 1000 may also include a nut 400 that engages with the threads. The nut 400 may be located in front of the coil spring 300.

[0092] According to this configuration of the present invention, the nut 400 can be prevented from coming off the connecting rod 210 that is configured to be connected to the connecting rod 210. As a result, the coil spring 300 or the bus bar 100 connected to the connecting rod 210 can be stably supported even if it moves in the forward and backward directions.

[0093] 12 and 13 , a battery rack 1000 according to an embodiment of the present invention may include a support member 500. The support member 500 may be located between the nut 400 and the coil spring 300. The support member 500 may include a coupling hole 501. The coupling rod 210 may pass through the coupling hole 501. The support member 500 may be configured to be movable in the front-rear direction along the coupling rod 210. The front side of the support member 500 may be supported by the nut 400. This prevents the support member 500 from coming off the coupling rod 210 and allows the support member 500 to maintain a stable coupled state. The support member 500 may also support the coil spring 300. The diameter of the support member 500 may be configured to be larger than the diameter of the coil spring 300.

[0094] According to this configuration of the present invention, the support member 500 can prevent the coil spring 300 from coming off the connecting rod 210. This allows the coil spring 300 to provide the bus bar 100 with a stable restoring force.

[0095] FIG. 14 is a diagram showing a support member 500 according to the present invention. FIG. 14a is a front perspective view of the support member, FIG. 14b is a rear perspective view of the support member, and FIG. 14c is a schematic diagram showing a partial cross-section taken along line B-B'. Referring to FIGS. 12 to 14, the support member 500 of the battery rack 1000 according to one embodiment of the present invention may be a disc spring 500. The support member 500 may provide a restoring force that biases the coil spring 300 rearward. Alternatively, the support member 500 may be a leaf spring 500. Alternatively, the support member 500 may be a flexible washer 500. Alternatively, the support member 500 may be a spring washer 500.

[0096] The front surface 504 of the support member 500 may be configured to protrude rearward. Alternatively, the front surface 504 of the support member 500 may be configured to protrude in the -Y-axis direction. The rear surface 502 of the support member 500 may be configured to protrude rearward. Alternatively, the front surface 504 of the support member 500 may be configured to protrude in the -Y-axis direction. The peripheral surface 503 may be configured to connect the front surface 504 and the rear surface 502. The front surface 504 and the rear surface 502 may be configured to have the same shape. For example, the periphery of the front surface 504 may be configured to be circular. Also, the periphery of the rear surface 502 may be configured to be circular. The thickness t of the support member 500 may be uniform throughout the entire support member 500. For example, the thickness t of the outermost portion of the support member 500 and the thickness t around the coupling hole 501 of the support member 500 may be configured to be the same. The support member 500 may be configured to provide a rearward restoring force when subjected to a forward force. Alternatively, the support member 500 may be configured to provide a restoring force in the -Y direction when subjected to a force in the +Y direction.

[0097] According to this configuration of the present invention, the restoring force that urges the bus bar 100 backward is strong. When the battery rack 1000 is moved or used for a long period of time, the restoring force of the coil spring 300 may weaken. If the restoring force of the coil spring 300 weakens, the bus bar 100 may not be stably supported. In this case, if the restoring force of the support member 500 is applied, the bus bar 100 can be stably supported even if the restoring force of the coil spring 300 weakens. The restoring force of the support member 500 can be configured to be maintained for a longer period of time than the restoring force of the coil spring 300.

[0098] 15A and 15B are views showing an insulating sheet according to the present invention. Fig. 15A shows the insulating sheet coupled to the connecting rod, and Fig. 15B shows the insulating sheet removed from the connecting rod. Referring to Figs. 12, 13, and 15, a battery rack 1000 according to an embodiment of the present invention may include a terminal 220 and an insulating sheet 600.

[0099] The battery module 200 may include a terminal 220. The terminal 220 may be formed on the outer surface of the battery module 200. The terminal 220 may be adjacent to the connecting rod 210. The terminal 220 may also include a terminal hole 221. The connecting rod 210 may pass through the terminal hole 221. The diameter of the terminal hole 221 may be larger than the diameter of the connecting rod 210. This prevents contact between the terminal 220 and the connecting rod 210. The head 211 of the connecting rod 210 may be located inside the battery module 200. At least a portion of a cover forming the outer surface of the battery module 200 may be located between the head 211 and the terminal 220. For example, during the process of injecting the cover of the battery module 200, the head 211 may be inserted into the cover of the battery module 200 so as not to be exposed to the outside of the battery module 200. This prevents contact between the terminal 220 and the head 211. That is, the terminal 220 and the connecting rod 210 are not electrically connected.

[0100] The insulating sheet 600 may be positioned between the terminal 220 and the bus bar 100. The insulating sheet 600 may be coupled to the connecting rod 210. The insulating sheet 600 may be made of an electrically insulating material. The diameter of the insulating sheet 600 may be larger than the diameter of the terminal 220. The diameter of the insulating sheet 600 may also be larger than the width of the bus bar 100. The insulating sheet 600 can prevent contact between the bus bar 100 and the terminal 220. The insulating sheet 600 may be configured with an area large enough to prevent contact between the bus bar 100 and the terminal 220. The insulating sheet 600 can also electrically insulate the bus bar 100 from the terminal 220.

[0101] According to this configuration of the present invention, the battery rack 1000 can be maintained in an electrically inactive state by disconnecting the electrical connections between the plurality of battery modules 200. This allows the battery rack 1000 to be electrically stable while being transported, delivered, moved, or stored.

[0102] 12, 13, and 15, the insulating sheet 600 may include an insulating portion 610 and a handle portion 620. The insulating portion 610 may contact at least one of the bus bar 100 or the terminal 220. The handle portion 620 may be a portion extending from a surrounding portion 611 of the insulating portion 610. The handle portion 620 and the insulating portion 610 may be separated by a folding line 604. The handle portion 620 may extend sufficiently from the insulating portion 610 to make it easy for a user to pull the insulating sheet 600. Furthermore, the insulating sheet 620 may be folded along the fold line 604, and the handle portion 620 may be inclined obliquely relative to the insulating portion 610. For example, the handle portion 620 may be inclined obliquely forward relative to the insulating portion 610, making it easier for a user to grasp the handle portion 620.

[0103] The diameter of the first hole 601 may be larger than the diameter of the connecting rod 210. For example, the first hole 601 may protrude or extend toward the surrounding portion 611 of the insulating portion 610. Alternatively, the first hole 601 may protrude or extend toward the -X-axis direction. This allows the insulating sheet 600 to be more easily separated or removed from the connecting rod 210 when a user pulls the insulating sheet 600 in the +X-axis direction.

[0104] The second hole 602 may be formed in a direction in which the first hole 601 protrudes or extends, so that when a user pulls the insulating sheet 600 in the +X-axis direction, the insulating sheet 600 can be more easily separated or removed from the connecting rod 210.

[0105] The third hole 603 may be formed in a direction in which the first hole 601 protrudes or extends. The third hole 603 may also be located between the second hole 602 and the surrounding portion 611. For example, the third hole 603 may have a shape in which at least a portion of the surrounding portion 611 is recessed or concave toward the second hole 602. Alternatively, the third hole 603 may have a notch shape in which at least a portion of the surrounding portion 611 is cut toward the second hole 602. As a result, when a user pulls the insulating sheet 600 in the +X-axis direction, the first hole 601 and the second hole 602 may be cut. The second hole 602 and the third hole 603 may also be cut.

[0106] 12, 13, and 15, the insulating sheet 600 of the battery rack 1000 according to an embodiment of the present invention may include a first hole 601 and a second hole 602.

[0107] The connecting rod 210 may pass through the first hole 601. The first hole 601 may be formed in the central portion of the insulating sheet 600. The first hole 601 may be referred to as an insulating hole 601. The second hole 602 may be configured adjacent to the first hole 601. The second hole 602 may be referred to as a guide hole 602. A plurality of second holes 602 may be formed. A plurality of second holes 602 may be formed between the edge of the insulating sheet 600 and the first hole 601. The second holes 602 may be configured to extend long toward the edge of the insulating sheet 600.

[0108] According to this configuration of the present invention, a user of the battery rack 1000 can easily separate or remove the insulating sheet 600 from the connecting rod 210 without separating components such as the nut 400, the support member 500, the coil spring 300, or the bus bar 100 from the connecting rod 210.

[0109] Fig. 16 is a diagram schematically illustrating a partial configuration of a battery rack 1000 according to an embodiment of the present invention. For example, Fig. 16 can be considered a modified example of a partial configuration of the cross section taken along the cutting line A-A' in Fig. 2. Referring to Figs. 13 and 16, the battery rack 1000 according to an embodiment of the present invention may include terminals 220 and bus bars 100.

[0110] The battery module 200 may include a terminal provided on the outer surface of the battery module 200 and adjacent to the connecting rod 210. The bus bar 100 may then contact the terminal 220. The bus bar 100 may also be electrically connected to the terminal 220.

[0111] The battery rack 1000 of Fig. 16 may be in a state in which the insulating sheet 600 of Fig. 13 has been removed. When the insulating sheet 600 is removed, the bus bar 100 may move rearward due to the restoring force of at least one of the coil springs 300 and the support member 500. As a result, the bus bar 100 may come into contact with the terminal 220. The bus bar 100 may be supported so as to maintain contact with the terminal 220 due to the restoring force of at least one of the coil springs 300 and the support member 500.

[0112] According to this configuration of the present invention, a user can electrically activate the battery rack 1000 by pulling the insulating sheet 600 to remove it from the connecting rod 210. This allows the battery rack 1000 to be installed quickly and easily, saving the labor and time of workers.

[0113] 1 , the battery rack 1000 according to the present invention may further include a rack frame 700 for fixing, supporting, or installing a plurality of battery modules 200. The battery rack 1000 according to the present invention may also include a BMS 800 for controlling the plurality of battery modules 200. For example, one BMS 800 may be provided for two battery racks 1000.

[0114] Referring to FIG. 1 , a battery container 2000 according to the present invention may include a battery rack 1000 according to the present invention. A plurality of battery racks 1000 may be configured. The battery container 2000 may include a container housing 1100. The container housing 1100 may provide a storage space for storing the battery racks 1000. The battery container 2000 may also include a control unit 1200 for controlling the plurality of battery racks 1000. In addition, the battery container 2000 may be configured to further include a sensor for detecting the state of the battery rack 1000 or a fire protection module for controlling thermal events.

[0115] An energy storage system (ESS) according to the present invention may include a battery rack 1000 according to the present invention. The energy storage system may include a plurality of battery containers 2000. The battery container 2000 may include a plurality of battery racks 1000. Such an energy storage system may configure a link group by combining a certain number of battery containers 2000 and a control container. For example, the control container may perform overall control and diagnosis of the battery containers 2000. The control container may also include DC parts, AC parts, and BSC parts for controlling the battery containers 2000. Meanwhile, each control container may be connected to a PCS.

[0116] Although terms indicating directions such as up, down, left, right, front, and rear are used in this specification, it will be obvious to those skilled in the art that these terms indicate relative positions and are used only for convenience of explanation, and may vary depending on the position of the object in question, the position of the observer, etc.

[0117] Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific preferred embodiments described above, and it goes without saying that anyone having ordinary skill in the art to which the invention pertains can make various modifications without departing from the gist of the present invention as claimed in the claims, and such modifications are included within the scope of the claims. [Explanation of symbols]

[0118] 100 Busbar 101 holes 102 area (part, peripheral area) 103 Central part 104 Central part 105 Periphery 110 First groove 111 Round Section 120 Second groove 130 Third groove 200 Battery Module 210 Connecting rod 211 head 220 terminals (positive terminal, negative terminal) 221 Terminal hole 300 coil spring 400 nuts 500 Supporting members (disc springs, leaf springs, washers, spring washers) 501 coupling hole 502 Rear 503 Peripheral surface 504 Front 600 Insulation Sheet 601 First hole (insulation hole) 602 Second hole (guide hole) 603 3rd hole 604 eyes 610 Insulation section 611 Surrounding area 620 Insulation Sheet 620 Handle 700 rack frame 1000 Battery Rack 1100 Container Housing 1200 control section 2000 Battery Container

Claims

1. a plurality of battery modules stacked vertically, each having a connecting rod protruding forward; a bus bar that is coupled to each connecting rod of two adjacent battery modules among the plurality of battery modules so as to be movable in the front-to-rear direction, the bus bar being made of a metal material and configured to have flexibility.

2. The battery rack according to claim 1 , wherein the bus bar includes a plurality of first grooves formed in a direction perpendicular to a longitudinal direction of the bus bar.

3. The bus bar is The battery rack according to claim 2 , further comprising a plurality of second grooves formed in a direction perpendicular to the plurality of first grooves and extending along the longitudinal direction of the bus bar.

4. a plurality of the first grooves are formed on a front surface of the bus bar; The bus bar is The battery rack according to claim 2 , further comprising a plurality of third grooves formed on a rear surface of the bus bar in a direction perpendicular to the longitudinal direction of the bus bar.

5. The battery rack of claim 1 , further comprising a coil spring that provides a restoring force that biases the bus bar rearward.

6. The battery module is a terminal provided on an outer surface of the battery module and adjacent to the connecting rod; The battery rack of claim 5 , wherein the bus bars contact and electrically connect to the terminals.

7. The connecting rod is threaded; The battery module includes: The battery rack according to claim 5 , further comprising a nut located in front of the coil spring and coupled to the threads.

8. The battery rack according to claim 7 , further comprising a support member located between the nut and the coil spring.

9. The support member is 9. The battery rack according to claim 8, wherein the restoring force that biases the coil spring rearward is a disc spring.

10. The battery module is a terminal formed on an outer surface of the battery module and adjacent to the connecting rod; The battery rack is The battery rack according to claim 1 , further comprising an insulating sheet positioned between the terminals and the bus bars.

11. The battery rack according to claim 10 , wherein the insulating sheet includes a first hole through which the connecting rod passes and a second hole adjacent to the first hole.

12. A battery container comprising a battery rack according to any one of claims 1 to 11.

13. An electrical power storage system comprising the battery rack according to any one of claims 1 to 11.

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