Battery pack and vehicle including the same

Abstract

A battery pack according to an embodiment of the present invention comprises: a plurality of battery cells; a bus bar assembly disposed on one side of the plurality of battery cells and including sub-bus bar units connected to positive and negative electrodes of the plurality of battery cells; and a side frame supporting the plurality of battery cells at a bottom of the bus bar assembly, and including a metal member connected to the sub-bus bar unit.

Description

Technical Field

[0001] This disclosure relates to battery packs and vehicles including battery packs, and to battery packs with improved stability having electrical connections and vehicles including battery packs.

[0002] This application relates to and claims priority to Korean Patent Application No. 10-2024-0019095, filed with the Korean Intellectual Property Office on February 7, 2024, the entire disclosure of which is incorporated herein by reference. Background Technology

[0003] Secondary batteries (which are easy to apply to product groups and have electrical characteristics such as high energy density) are commonly used in electric vehicles (EVs) or hybrid electric vehicles (HEVs) powered by electric drive sources, as well as portable devices. These secondary batteries are gaining attention as a new energy source for improving environmental friendliness and energy efficiency due to their major advantage of significantly reducing fossil fuel use and another advantage of not producing byproducts from energy use.

[0004] Currently widely used rechargeable batteries include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. The operating voltage of a single rechargeable battery cell (i.e., a single battery cell) is approximately 2.5V to 4.5V. Therefore, when a higher output voltage is required, a battery pack can be configured by connecting multiple battery cells in series. Furthermore, depending on the required charge / discharge capacity of the battery pack, a battery pack can be configured by connecting multiple battery cells in parallel. Accordingly, the number of battery cells included in a battery pack can be set in various ways according to the required output voltage or charge / discharge capacity.

[0005] Currently, medium to large battery packs used in electric vehicles and other applications are configured to include a large number of battery cells with higher cell capacity to increase output and / or capacity, and these battery cells are electrically connected via busbars.

[0006] Medium to large battery packs require a higher level of safety in their busbar electrical connection structure. However, using large busbars to ensure the stability of the electrical connection structure increases the overall size of the battery pack due to the space occupied by the large busbars, thus hindering the thinning and lightening of the battery pack and reducing its energy density.

[0007] Therefore, it is necessary to find a way to maximize energy density while ensuring the stability of the electrical connection structure of large-capacity battery packs, such as medium to large-capacity battery packs. Summary of the Invention

[0008] Technical issues

[0009] This disclosure aims to address the problems in the related technology, and therefore aims to provide a battery pack that can maximize energy density while ensuring the stability of the electrical connection structure, as well as a vehicle including the battery pack.

[0010] Furthermore, this disclosure also aims to provide a battery pack that can further improve structural rigidity and a vehicle including the battery pack.

[0011] However, the technical problems sought to be solved by this disclosure are not limited to those described above, and those skilled in the art will clearly understand from the invention described below that there are other problems not mentioned.

[0012] Technical solution

[0013] According to one aspect of this disclosure, a battery pack is provided, the battery pack comprising: a plurality of battery cells; a busbar assembly disposed on one side of the plurality of battery cells and including sub-busbar units connected to electrodes of the plurality of battery cells; and a side frame configured to support the plurality of battery cells at the bottom of the busbar assembly and including metal members connected to the sub-busbar units.

[0014] Furthermore, preferably, the sub-busbar unit may include: a bidirectional connecting busbar connected to the electrodes of the battery cell on both sides of the sub-busbar unit in the width direction; and a unidirectional connecting busbar connected to the electrode of the battery cell on one side of the sub-busbar unit in the width direction, and the metal member may be connected to the unidirectional connecting busbar.

[0015] Furthermore, preferably, a portion of the metal component may contact the one-way connection busbar at the top of the side frame, and the remaining portion of the metal component may be inserted into the side frame.

[0016] Furthermore, preferably, the metal member can be inserted into the side frame, and one end of the metal member is bent to connect to the unidirectional busbar at the top of the side frame.

[0017] Furthermore, preferably, the metal component may include: an insertion portion that is inserted into the side frame; and a busbar connection portion that is bent from the insertion portion to connect to the unidirectional busbar outside the side frame.

[0018] Furthermore, preferably, the busbar connection portion may include: a connection body formed to have a predetermined length in the longitudinal direction of the unidirectional busbar; and a protrusion that protrudes from the connection body toward the unidirectional busbar by a predetermined length, thereby contacting the unidirectional busbar.

[0019] Furthermore, preferably, the protrusion can be welded to the unidirectional connection busbar.

[0020] Furthermore, preferably, the protrusion can be configured in a trapezoidal shape.

[0021] Furthermore, preferably, the plurality of protrusions can be arranged to be spaced apart from each other by a predetermined distance in the longitudinal direction of the connecting body.

[0022] Furthermore, preferably, the plurality of protrusions can be disposed between the plurality of battery cells in the longitudinal direction of the connecting body.

[0023] Furthermore, preferably, the unidirectional connecting busbar can be disposed in the outermost portion on both sides of the sub-busbar unit, and the metal component can be disposed in the outermost portion on both sides of the side frame.

[0024] Furthermore, preferably, the side frame may include: a plurality of side structures configured to support the plurality of battery cells; and a pair of sidewalls disposed on the outermost portions of both sides of the plurality of side structures, and the metal member may be disposed on the pair of sidewalls.

[0025] Furthermore, preferably, the metal component can be installed onto the side frame using an insert molding process.

[0026] Furthermore, preferably, the metal component may be made of aluminum.

[0027] Furthermore, preferably, the thickness of the metal component can be at least 2 mm.

[0028] Furthermore, this disclosure may also provide a vehicle comprising at least one battery pack as described above.

[0029] Technical effect

[0030] According to the various embodiments described above, a battery pack that can maximize energy density while ensuring the stability of the electrical connection structure, and a vehicle including the battery pack, can be provided.

[0031] Furthermore, according to the various embodiments described above, a battery pack capable of further improving structural rigidity and a vehicle including the battery pack can be provided.

[0032] Furthermore, this disclosure can have various other effects according to various embodiments. The various effects of this disclosure will be described in detail in the various embodiments, or descriptions of effects that can be readily deduced by those skilled in the art will be omitted. Attached Figure Description

[0033] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the detailed description of the invention, are intended to provide a further understanding of the technical concept of the present disclosure. Therefore, the present disclosure should not be construed as being limited to the drawings.

[0034] Figure 1 This is a diagram illustrating a battery pack according to an embodiment of the present disclosure.

[0035] Figure 2 This is a schematic plan view of a battery pack according to an embodiment of the present disclosure.

[0036] Figure 3 yes Figure 2 A schematic enlarged view of part A of the battery pack.

[0037] Figure 4 It is shown schematically. Figure 2 A cross-sectional view of part A of the battery pack.

[0038] Figure 5 yes Figure 4 A schematic magnified view of the main components of the battery pack.

[0039] Figure 6 This is a partially exploded perspective view of a battery pack according to an embodiment of the present disclosure.

[0040] Figure 7 yes Figure 6 An exploded perspective view of the busbar assembly of the battery pack.

[0041] Figure 8 It is shown Figure 7 A diagram of the bidirectional connection of the sub-busbar units in the busbar assembly.

[0042] Figure 9 It is shown Figure 7 A diagram of a unidirectional connection of a sub-busbar unit in a busbar assembly.

[0043] Figure 10 yes Figure 6 An exploded perspective view of the side wall of the side frame of the battery pack.

[0044] Figure 11 It is shown in Figure 10 A diagram of the metal components installed on the side wall of the structure.

[0045] Figure 12It is shown schematically. Figure 10 The plan view in which the sidewalls of the metal components have been removed.

[0046] Figure 13 It is shown schematically. Figure 10 The image includes a cross-sectional view of the sidewall of the metal component.

[0047] Figure 14 yes Figure 13 A schematic enlarged view of the main components, including the sidewall of the metal structure.

[0048] Figure 15 This is a diagram illustrating the connection between the busbar assembly and the metal component of a battery pack according to an embodiment of the present disclosure.

[0049] Figure 16 This is a diagram illustrating a battery pack according to another embodiment of the present disclosure.

[0050] Figure 17 It is shown in Figure 16 A diagram of metal components installed on the side wall of the side frame of the battery pack.

[0051] Figure 18 This is a diagram illustrating a battery pack according to another embodiment of the present disclosure.

[0052] Figure 19 Is Figure 18 An exploded perspective view of the side wall of the side frame installed in the battery pack.

[0053] Figure 20 Is Figure 19 A three-dimensional view of the metal components installed on the side wall.

[0054] Figure 21 yes Figure 20 A side view of the metal components in the image.

[0055] Figure 22 It is shown Figure 19 The image includes a cross-sectional view of the sidewall of the metal component.

[0056] Figure 23 yes Figure 22 A schematic enlarged view of the main components, including the sidewall of the metal structure.

[0057] Figure 24 This is a diagram illustrating a battery pack according to another embodiment of the present disclosure.

[0058] Figure 25 It is shown Figure 24 A diagram showing the unidirectional connection of the sub-busbar units of the busbar assembly in the battery pack.

[0059] Figure 26 It shows the basis Figure 24 A diagram of a unidirectional busbar in another embodiment of the busbar assembly of a battery pack.

[0060] Figure 27 It is shown Figure 24 The diagram shows the unidirectional connection between the busbar assembly of the battery pack and the metal component.

[0061] Figure 28 This is a diagram illustrating a vehicle according to an embodiment of the present disclosure. Detailed Implementation

[0062] The preferred embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terminology used in the specification and appended claims should not be construed as limited to its general and dictionary meaning, but should be interpreted according to the meanings and concepts corresponding to the technical aspects of this disclosure, based on the principle that the inventors are permitted to appropriately define the terminology for the best interpretation.

[0063] Therefore, the embodiments and configurations presented in the drawings of this specification represent only the most preferred embodiments of this disclosure and do not represent all the technical ideas of this disclosure. It should be understood that various equivalents and modifications can be made to them when submitting this application.

[0064] At the same time, although this specification uses terms indicating direction (such as up, down, left, right, forward and backward directions), it will be apparent to those skilled in the art that these terms are for ease of interpretation only and may be changed depending on the position of the target object or the position of the observer.

[0065] Figure 1 This is a diagram illustrating a battery pack according to an embodiment of the present disclosure. Figure 2 This is a schematic plan view of a battery pack according to an embodiment of the present disclosure. Figure 3 yes Figure 2 A schematic enlarged view of part A of the battery pack. Figure 4 yes Figure 2 A schematic enlarged view of part A of the battery pack, and Figure 5 yes Figure 4 A schematic enlarged view of the main components of the battery pack. Meanwhile, for ease of explanation, [the following text is missing]. Figures 3 to 5 The configuration of the busbar covers 250 and 260 of the busbar assembly 200 is omitted.

[0066] Reference Figures 1 to 5 The battery pack 10 may include multiple battery cells 100, a busbar assembly 200, and a side frame 300.

[0067] Multiple battery cells 100 can be provided as cylindrical, pouch, or prismatic secondary batteries as secondary batteries. Hereinafter, this embodiment will be described based on the assumption that the multiple battery cells 100 are configured as cylindrical secondary batteries. The multiple battery cells 100 can be configured as a large number of battery cells with high cell capacity to increase output and / or capacity for constructing medium to large battery packs 10.

[0068] The busbar assembly 200 is used for electrical connection of multiple battery cells 100 and can be disposed on one side of the multiple battery cells 100. Specifically, the busbar assembly 200 can be disposed on top of the multiple battery cells 100 (in the +Z axis direction) so as to electrically connect to the multiple battery cells 100 in one direction.

[0069] The busbar assembly 200 may include a sub-busbar unit 210, which is connected to the electrodes 110 and 130 of a plurality of battery cells 100 for electrical connection.

[0070] The side frame 300 can support multiple battery cells 100 at the bottom (in the -Z axis direction) of the busbar assembly 200. In addition to the multiple battery cells 100, the side frame 300 can also support the busbar assembly 200 and other components constituting the battery pack 10.

[0071] The side frame 300 may include a metal member 400 connected to the sub-busbar unit 210. The metal member 400 may have a predetermined length and area.

[0072] According to this embodiment, when the sub-busbar unit 210 is electrically connected to the sub-busbar unit 210 via the metal member 400, the cross-sectional area corresponding to the metal member 400 can be further ensured.

[0073] Therefore, according to this embodiment, when the electrodes 110 and 130 of the sub-busbar unit 210 and the battery cell 100 are electrically connected, the stability of the electrical connection can be further ensured.

[0074] Furthermore, according to this embodiment, since a metal member 400 is further provided in the side frame 300, the rigidity of the side frame 300 can be improved by the metal member 400.

[0075] Figure 6 This is a partially exploded perspective view of a battery pack according to an embodiment of the present disclosure. Figure 7 yes Figure 6 An exploded perspective view of the busbar assembly of the battery pack. Figure 8 yes Figure 7 A diagram of the bidirectional connection of the sub-busbar units in the busbar assembly, and Figure 9 yes Figure 7A diagram of a unidirectional connection of a sub-busbar unit in a busbar assembly.

[0076] Reference Figures 6 to 9 As shown in the foregoing figures, the plurality of battery cells 100 may each include a positive electrode 110 and a negative electrode 130 as electrodes 110 and 130, respectively. An insulating gasket 150 may be disposed between the positive electrode 110 and the negative electrode 130 for electrical insulation.

[0077] The sub-bus unit 210 may include a bidirectional busbar 220 and a unidirectional busbar 230.

[0078] The bidirectional busbar 220 can be connected to the electrodes 110 and 130 of the battery cell 100 on both sides of the width direction (in the +Y axis direction and the -Y axis direction) of the sub-busbar unit 210.

[0079] The unidirectional busbar 230 can be connected to the electrodes 110 and 130 of the battery cell 100 on one side of the sub-busbar unit in the width direction (in the +Y axis direction or -Y axis direction).

[0080] The metal component 400 can be connected to the unidirectional busbar 230. When the sub-busbar unit 210 and the electrodes 110 and 130 of the battery cell 100 are electrically connected, the unidirectional busbar 230 connected to the electrodes 110 and 130 of the battery cell 100 on one side of the sub-busbar unit 210 in the width direction (in the +Y-axis direction or -Y-axis direction) may be more prone to melting due to high current compared to the bidirectional busbar 230. In this embodiment, since the metal component 400 is connected to the unidirectional busbar 230, an additional cross-sectional area of ​​the unidirectional busbar 230 can be obtained, thereby effectively preventing the risk of the unidirectional busbar 230 melting.

[0081] Figure 10 yes Figure 6 An exploded perspective view of the side wall of the side frame of the battery pack. Figure 11 It shows the setting Figure 10 A diagram of the metal components on the side wall. Figure 12 yes Figure 10 The top view in the image has removed the sidewalls of the metal components. Figure 13 yes Figure 10 The cross-sectional view of the sidewall including the metal component. Figure 14 yes Figure 13 A partial enlarged view of the main components, including the sidewalls of the metal structure, and... Figure 15 This is a diagram showing the connection between the busbar assembly and the metal components of a battery pack according to an embodiment of this disclosure.

[0082] Reference Figures 10 to 15As shown in the foregoing figures, a portion of the metal member 400 can contact the unidirectional connecting busbar 230 at the top of the side frame 300 (in the +Z axis direction), and the remaining portion of the metal member 400 can be inserted into the side frame 300. Therefore, the metal member 400 can be more stably fixed to the side frame 300 and connected to the busbar 230 of the sub-busbar unit 210 of the busbar assembly 200 while simultaneously contacting the busbar 230.

[0083] The metal member 400 can be inserted into the side frame 300, and one end of it can be bent to connect to the unidirectional busbar 230 at the top of the side frame 300. Specifically, the metal member 400 can have an integrally bent structure and can be installed into the side frame 300. As described above, in this embodiment, the connection between the metal member 400 and the unidirectional busbar 230 can be achieved through an insertion structure in which the metal member 400, configured as a single component, is inserted into the side frame 300, thus ensuring the cross-sectional area of ​​the unidirectional busbar 230 with a simple structure. Furthermore, in this embodiment, the rigidity of the side frame 300 can be strengthened with a simpler structure by inserting the metal member 400 into the side frame 300.

[0084] Multiple metal components 400 can be provided. The number of metal components 400 can be set to correspond to the number of unidirectional connecting busbars 230 in the sub-busbar unit 210. Therefore, in this embodiment, by ensuring the cross-sectional area of ​​all unidirectional connecting busbars 230, more uniform electrical stability of the sub-busbar unit 210 can be achieved. Furthermore, in this embodiment, since multiple metal components 400 are inserted into the side frame 300, the rigidity of the side frame 300 can be further improved.

[0085] The metal component 400 may include an insertion portion 410 and a busbar connection portion 430.

[0086] The insertion part 410 can be inserted into the side frame 300. The insertion part 410 can be configured as a generally square plate to ensure a predetermined cross-sectional area.

[0087] The busbar connector 430 can be bent from the insertion part 410 and connected to the unidirectional busbar 230 outside the side frame 300. The busbar connector 430 can support the bottom of the unidirectional busbar 230 at the top of the side frame 300 (in the +Z axis direction) and can be connected to the unidirectional busbar 230 by contact.

[0088] The busbar connector 430 may include a connector body 432 and a protrusion 435.

[0089] The connecting body 432 can be formed to have a predetermined length along the longitudinal direction (X-axis direction) of the unidirectional connecting busbar 230. The connecting body 432 can be mounted on the upper surface of the side frame 300. The connecting body 432 can be integrally bent from the insertion portion 410 and can at least partially contact the unidirectional connecting busbar 230.

[0090] The protrusion 435 can protrude a predetermined length from the connecting body 432 toward the unidirectional connecting busbar 230. The protrusion 435 can contact the unidirectional connecting busbar 230. The protrusion 435 can achieve a more stable contact between the unidirectional connecting busbar 230 and the metal member 400. In addition, the protrusion 435 can ensure the additional cross-sectional area of ​​the metal member 400. Furthermore, after the metal member 400 is inserted into the side frame 300, the protrusion 435 can effectively prevent the metal member 400 from moving in the longitudinal direction (X-axis direction) and the width direction (Y-axis direction) of the battery pack 10.

[0091] The protrusion 435 can be connected to the unidirectional busbar 230 by welding W. Welding W can be laser welding. Therefore, in this embodiment, the connection stability between the metal component 400 and the unidirectional busbar 230 can be further ensured. As described above, in this embodiment, the protrusion 435 can also serve as a welding point that ensures stable contact with the unidirectional busbar 230.

[0092] The protrusion 435 can be configured as a trapezoidal shape. In this embodiment, the side frame 300 can receive and support the battery cell 100, which is configured as a cylindrical secondary battery. Due to the shape characteristics of the cylindrical secondary battery, the portion of the side frame 300 that receives multiple battery cells 100 can be configured as a concave-convex shape. Specifically, the portion of the side frame 300 that receives the battery cells 100 can be configured such that protruding portions and recessed portions are alternately arranged in the longitudinal direction (X-axis direction) of the side frame 300. In this embodiment, by configuring the protrusion 435 as a trapezoidal shape, interference with the metal member 400 that may occur in the receiving portion of the battery cell 100 configured as a protruding portion and a recessed portion can be effectively prevented.

[0093] Multiple protrusions 435 can be provided. The multiple protrusions 435 can be arranged at predetermined distances in the longitudinal direction (X-axis direction) of the connecting body 432. Therefore, in this embodiment, by arranging multiple protrusions 435 at predetermined distances in the longitudinal direction (X-axis direction) of the connecting body 432, movement of the metal member 400 in the longitudinal direction (X-axis direction) of the side frame 300 can be prevented more reliably.

[0094] Multiple protrusions 435 can be disposed between multiple battery cells 100 in the longitudinal direction (X-axis direction) of the connecting body 432. Therefore, in this embodiment, the rigidity of the side frame 300 between the multiple battery cells 100 can be further enhanced by the multiple protrusions 435, and the multiple battery cells 100 can be prevented from moving in the longitudinal direction (X-axis direction) of the side frame 300.

[0095] The unidirectional busbar 230 can be disposed on the outermost portions of both sides of the sub-busbar unit 210 (in the +Y-axis and -Y-axis directions). The metal member 400 can be disposed on the outermost portions of both sides of the side frame 300 (in the +Y-axis and -Y-axis directions). Therefore, the metal member 400 can prevent the sub-busbar unit 210 from melting at its outermost portions on both sides of the side frame 300 (in the +Y-axis and -Y-axis directions) and strengthen the rigidity of the outermost portions on both sides of the side frame 300 (in the +Y-axis and -Y-axis directions).

[0096] The side frame 300 according to an embodiment of the present disclosure will be described in more detail below.

[0097] The side frame 300 may include a plurality of side structures 310 and a pair of sidewalls 330.

[0098] Multiple side structures 310 can support multiple battery cells 100. The multiple side structures 310 can be formed to have a predetermined length in the longitudinal direction (X-axis direction) of the battery pack 10, and can receive and support two rows of battery cells 100. The multiple side structures 310 can receive and support battery cells 100 in the width direction (Y-axis direction) of the battery pack 10 while being interconnected.

[0099] The pair of sidewalls 330 can form both sides of the side frame 300 and can be disposed on the outermost portions of both sides of the plurality of side structures 310 (in the +Y-axis direction and the -Y-axis direction). The pair of sidewalls 330 can receive and support at least one row of multiple battery cells 100. The pair of sidewalls 330 can be connected to the side structures 310 facing each other in the width direction (Y-axis direction) of the battery pack 100.

[0100] Metal components 400 can be disposed on a pair of sidewalls 330. Since metal components 400 are disposed on a pair of sidewalls 330 constituting both sides of the side frame 300, the rigidity of the pair of sidewalls 330 exposed on both sides of the side frame 300 (in the +Y axis direction and -Y axis direction) can be enhanced while ensuring the stability of the electrical connection between the busbar assembly 200 and the battery cell 100 on both sides of the side frame 300.

[0101] Metal component 400 can be installed into side frame 300 via an insert molding process. Specifically, metal component 400 can be installed into each of a pair of sidewalls 330 via an insert molding process. The insert molding process can be performed during the manufacturing process of sidewall 330 or the assembly process of side frame 330. In this embodiment, metal component 400 can be integrated into sidewall 330 via an insert molding process.

[0102] The metal component 400 can be made of aluminum. Therefore, in this embodiment, a lighter material can be used to achieve stable electrical connections in the busbar assembly 200.

[0103] The thickness of the metal component 400 can be at least 2 mm. Therefore, in this embodiment, the rigidity of the sidewall 330 can be strengthened on both sides in the lateral direction (Y-axis direction) and the height direction (Z-axis direction) of the sidewall 330.

[0104] Each of the pair of sidewalls 330 may include a metal component receiving portion 333, a metal component placement portion 336, and a cell receiving portion 338.

[0105] The metal component receiving portion 333 can be provided to a predetermined depth in the height direction (Z-axis direction) of the side wall 330. The metal component receiving portion 333 can be provided as a receiving groove of a predetermined length. The insertion portion 410 of the metal component 400 can be inserted into the metal component receiving portion 333.

[0106] The metal component mounting portion 336 can be bent from the end of the metal component receiving portion 333 and is provided on the upper surface 335 of the side wall 330. The busbar connecting portion 430 of the metal component 400 can be mounted on the metal component mounting portion 336.

[0107] The metal component mounting portion 336 can be disposed from the upper surface 335 of the sidewall 330 to a predetermined depth. The predetermined depth can be configured to correspond to the thickness of the busbar connection portion 430 of the metal component 400. Specifically, the predetermined depth can be configured to be equal to the thickness of the busbar connection portion 430. Therefore, when the busbar connection portion 430 of the metal component 400 is mounted on the metal component mounting portion 336, the metal component mounting portion 336 does not need to protrude outward from the upper surface 335 of the sidewall 330.

[0108] Therefore, in this embodiment, when the metal component 400 is connected to the unidirectional connecting busbar 230 of the sub-busbar unit 210 by contact, the unidirectional connecting busbar 230 can be stably disposed on the upper surface 335 of the sidewall 330.

[0109] Furthermore, in this embodiment, since the busbar connection portion 430 is placed on the metal component placement portion 336 by being inserted into it, the metal component 400 can be more reliably prevented from moving or separating from the side wall 330.

[0110] The cell receiving portion 333 can receive and support multiple battery cells 100. Furthermore, the cell receiving portion 333 can also receive and support the cooling pipe 500, which will be described later. The cell receiving portion 333 can be configured with a concave-convex shape in the longitudinal direction (X-axis direction) of the sidewall 330. This shape corresponds to the shape of the multiple battery cells 100 configured as cylindrical secondary batteries and is designed to receive and support as many battery cells 100 as possible while minimizing dead space.

[0111] The edge 337 of the sidewall 330 can be configured to protrude a predetermined height from the upper surface 335 of the sidewall 330 in the height direction (Z-axis direction) of the sidewall 330. This predetermined height can be at least equal to or greater than the height of the unidirectional connecting busbar 230 of the sub-busbar unit 210. Therefore, when the unidirectional connecting busbar 230 of the sub-busbar unit 210 is mounted on the sidewall 330, the unidirectional connecting busbar 230 can be mounted on the upper surface 335 of the sidewall 330 without protruding in the height direction (Z-axis direction) of the sidewall 330. Thus, in this embodiment, the unidirectional connecting busbar 230 of the sub-busbar unit 210 can be mounted on the sidewall 330 without being exposed outside the sidewall 330.

[0112] In this embodiment, since the unidirectional connecting busbar 230 of the sub-busbar unit 210 does not protrude outside the sidewall 330 in the height direction (Z-axis direction) of the sidewall 330, the risk of breakage or damage to the unidirectional connecting busbar 230 that may be caused by the unidirectional connecting busbar 230 protruding in the height direction (Z-axis direction) can be significantly reduced.

[0113] The busbar assembly 200 and other components constituting the battery pack 10 will be described in more detail below.

[0114] Reference Figures 3 to 9 The busbar assembly 200 may include a sub-busbar unit 210 and busbar covers 250 and 260.

[0115] Multiple bidirectional busbars 220 can be set in the sub-busbar unit 210.

[0116] Each of the plurality of bidirectional busbars 220 may include a busbar body 222 and electrode connection portions 224 and 226.

[0117] The busbar body 222 can be formed to have a predetermined length and can be configured as a single-layer structure. The busbar body 222 can be configured to a shape corresponding to the arrangement structure of the battery cell 100 to improve the efficiency of electrical connection with the battery cell 100.

[0118] The busbar body 222 can be made of a conductive material. For example, the busbar body 222 can be made of a metallic material such as aluminum or copper. However, it is not limited to this; the busbar body 222 can also be made of other materials for electrical connection.

[0119] Electrode connection portions 224 and 226 may include a positive electrode connection portion 224 and a negative electrode connection portion 226.

[0120] The positive electrode connection 224 can protrude from one side of the busbar body 222 in the width direction (+Y axis direction or -Y axis direction) and can be connected to the positive electrode 110 of the battery cell 100.

[0121] The negative electrode connection portion 226 can protrude from the other side (-Y-axis direction or +Y-axis direction) of the busbar body 222 in the width direction, opposite to the positive electrode connection portion 224 on the other side (+Y-axis direction or -Y-axis direction) of the busbar body 222 in the width direction. The negative electrode connection portion 226 can be connected to the negative electrode 130 of the battery cell 100.

[0122] The positive electrode connection 224 and the negative electrode connection 226 can be arranged alternately in the longitudinal direction (Y-axis direction) of the busbar body 222. For example, as Figure 8 As shown, multiple positive electrode connections 224 can be disposed on one side (+Y-axis direction) of a busbar body 222 in the width direction, and multiple negative electrode connections 226 can be disposed on the other side (-Y-axis direction) of the busbar body 222 in the width direction along the longitudinal direction (X-axis direction). Here, the multiple positive electrode connections 224 and the multiple negative electrode connections 226 can be alternately arranged in the longitudinal direction (X-axis direction) of a single busbar body 222. This alternating arrangement can indicate that a negative electrode busbar 226 is disposed between two positive electrode busbars 224 in the longitudinal direction (X-axis direction) of the busbar body 222, and a positive electrode busbar 224 is disposed between two negative electrode busbars 226 in the longitudinal direction (X-axis direction) of the busbar body 222.

[0123] As described above, the positive busbar 224 and the negative busbar 226 can protrude from both sides (+X-axis direction and -Y-axis direction) of the busbar body 222 in the width direction, thereby forming a bidirectional connection busbar 220.

[0124] Multiple unidirectional busbars 230 can be set in sub-busbar units 210.

[0125] Each of the plurality of unidirectional busbars 230 may include a busbar body 232 and electrode connection portions 234 and 236.

[0126] The busbar body 232 can be formed to have a predetermined length and can be configured as a single-layer structure. The busbar body 232 can be configured to a shape corresponding to the arrangement structure of the battery cell 100 to improve the efficiency of electrical connection with the battery cell 100.

[0127] The busbar body 232, similar to the busbar body 222 of the bidirectional busbar 220, can be made of a conductive material. For example, the busbar body 232 can be made of a metallic material such as aluminum or copper. However, it is not limited to this; the busbar body 232 can also be made of other materials for electrical connection.

[0128] Electrode connection portions 234 and 236 may include a positive electrode connection portion 234 and a negative electrode connection portion 236.

[0129] The positive electrode connection 234 can protrude from one side of the busbar body 232 in the width direction (+Y axis direction or -Y axis direction) and can be connected to the positive electrode 110 of the battery cell 100.

[0130] The negative electrode connection portion 236 can protrude from one side (+Y-axis direction or -Y-axis direction) of the busbar body 232 in the width direction, and the negative electrode connection portion 236 is located on the same side as the positive electrode connection portion 234 on the same side (+Y-axis direction or -Y-axis direction) of the busbar body 222 in the width direction. The negative electrode connection portion 236 can be connected to the negative electrode 130 of the battery cell 100.

[0131] In this embodiment, the positive electrode connection portion 234 and the negative electrode connection portion 236 can be configured to protrude from one side (+Y-axis direction or -Y-axis direction) of the busbar body 232 in the width direction, thereby configuring a unidirectional busbar 230. Here, the unidirectional busbar 230 may have only one of the positive electrode connection portion 234 and the negative electrode connection portion 236 on one side (+Y-axis direction or -Y-axis direction) of the busbar body 232 in the width direction. Furthermore, the unidirectional busbar 230 may simultaneously have both the positive electrode connection portion 234 and the negative electrode connection portion 236 on one side (+Y-axis direction or -Y-axis direction) of the busbar body 232 in the width direction. For example, as... Figure 9 As shown, the unidirectional busbar 230 can be configured to have both a positive connection portion 234 and a negative connection portion 236 on one side (-Y axis direction) of the busbar body 232 in the width direction.

[0132] Multiple unidirectional busbars 230 can be disposed on the outermost portions of both sides of the sub-busbar unit 210 (in the +Y axis direction and the -Y axis direction). Multiple bidirectional busbars 220 can be disposed between the multiple unidirectional busbars 230.

[0133] Busbar covers 250 and 260 can cover the top of multiple battery cells 100 (in the +Z axis direction) and can be configured as generally flat. The shape and size of busbar covers 250 and 260 can vary depending on the number or capacity of battery cells 100 required by the battery pack 10.

[0134] Busbar covers 250 and 260 can be made of insulating material. For example, busbar covers 250 and 260 can be made of polyimide film. However, they are not limited to this; busbar covers 250 and 260 can also be configured as other insulating components made of insulating material.

[0135] Multiple busbar covers 250 and 260 can be configured to have shapes and sizes that correspond to each other in the vertical direction (Z-axis direction) of the battery pack 10, so as to interconnect with the sub-busbar units 210 inserted therebetween.

[0136] Specifically, the plurality of busbar covers 250 and 260 may include a first cover 250 and a second cover 260.

[0137] The first cover 250 may cover the top of the sub-busbar unit 210 (in the +Z axis direction). The first cover 250 may have multiple guide holes 255. The multiple guide holes 255 may form a predetermined open space. The multiple guide holes 255 may expose the electrodes 110 and 130 of the battery cell 100 and the electrical connection portion of the sub-busbar unit 210, guiding the electrical connection between the electrodes 110 and 130 of the battery cell 100 and the sub-busbar unit 210.

[0138] The second cover 260 may cover the bottom (in the -Z axis direction) of the sub-busbar unit 210. The second cover 260 may have a plurality of guide holes 265. The plurality of guide holes 265 may form a predetermined open space and have a shape and size corresponding to the plurality of guide holes 255 of the first cover 250. When the first cover 250 and the second cover 260 are interconnected, the plurality of guide holes 265 may communicate with the plurality of guide holes 255 of the first cover 250.

[0139] Multiple guide holes 265 and multiple guide holes 255 of the first cover 250 can expose the electrodes 110 and 130 of the battery cell 100 and the electrical connection of the sub-busbar unit 210, and guide the electrical connection between the electrodes 110 and 130 of the battery cell 100 and the sub-busbar unit 210.

[0140] The battery pack 10 may include a cooling pipe 500.

[0141] The cooling pipe 500 can be formed to have a predetermined length for cooling multiple battery cells 100, and can be disposed between the multiple battery cells 100. Multiple cooling pipes 500 can be disposed.

[0142] Multiple cooling pipes 500 can be configured to contact the outer surface of multiple battery cells 100 to improve cooling performance, and can be supported by side frames 300.

[0143] Multiple cooling pipes 500 may be provided with cooling channels for the flow of cooling medium. Furthermore, the multiple cooling pipes 500 may be connected to a cooling device or the like for circulating the cooling medium. The cooling medium may be a cooling fluid. In this embodiment, the cooling fluid may be water, and may include one or more fluids capable of exchanging heat with the surrounding environment, as well as water.

[0144] Figure 16 This is a diagram illustrating a battery pack according to another embodiment of the present disclosure. Figure 17 It is shown in Figure 16 A diagram showing a metal member installed on the side wall of the side frame of the battery pack. Also, as in the previous embodiment, for ease of explanation, Figure 16 The configuration of the busbar covers 250 and 260 of the busbar assembly 200, which will be described later, is omitted.

[0145] Since the battery pack 20 according to this embodiment is similar to the battery pack 10 of the previous embodiment, repeated descriptions of elements that are substantially the same or similar to those in the previous embodiment will be omitted, and the following description will be based on the differences from the previous embodiment.

[0146] Reference Figure 16 and Figure 17 The battery pack 20 may include multiple battery cells 100, busbar assembly 200, side frame 305, metal component 405 and cooling pipe 500.

[0147] Since the multiple battery cells 100 are substantially the same or similar to those in the previous embodiments, their repeated descriptions will be omitted below.

[0148] The busbar assembly 200 may include sub-busbar units 210. Although in Figure 16 The middle part is omitted, but the busbar assembly 200 may include busbar covers 250 and 260 as in the previous embodiment (see Figure 7 ).

[0149] The sub-bus unit 210 may include a bidirectional busbar 220 and a unidirectional busbar 230.

[0150] Since the bidirectional busbar 220 and the unidirectional busbar 230 are substantially the same as or similar to those in the previous embodiments, their repeated descriptions will be omitted below.

[0151] The side frame 305 may include a plurality of side structures 310 and a pair of sidewalls 350.

[0152] Since the multiple side structures 310 are substantially the same or similar to those in the previous embodiments, their repeated descriptions will be omitted below.

[0153] Each of the pair of sidewalls 350 may include a metal component receiving portion 353, a metal component placement portion 356, and a cell receiving portion 358.

[0154] Since the metal component receiving part 353 is similar to the metal component receiving part 333 in the previous embodiment, its repeated description will be omitted below.

[0155] The metal component mounting portion 356 can be formed on the upper surface of the sidewall 350 from the end of the metal component receiving portion 353 to a predetermined depth. The metal component mounting portion 356 can be configured to correspond to the shape of the busbar connection portion 450 of the metal component 405, which will be described later.

[0156] Since the cell housing 358 is similar to the cell housing 338 in the previous embodiment, its repeated description will be omitted below.

[0157] The metal component 405 may include an insertion portion 415 and a busbar connection portion 450.

[0158] The insertion part 415 can be inserted into the metal component receiving part 353 of the side wall 350. Since the insertion part 415 is similar to the insertion part 410 in the previous embodiment, its repeated description will be omitted below.

[0159] The busbar connector 450 may include a connector body 452 and a protrusion 455.

[0160] Since the connection body 452 is similar to the connection body 432 in the previous embodiment, its repeated description will be omitted below.

[0161] The protrusion 455 can protrude integrally from the connecting body 452. The protrusion 455 can be configured as a single protrusion structure having a predetermined length and a predetermined width for each connecting body 452. The protrusion 455 provided for each connecting body 452 can be configured as a generally elongated trapezoidal shape.

[0162] In this embodiment, the protrusion 455 is formed as an elongated trapezoidal shape with a predetermined length and a predetermined width, thereby obtaining a protrusion 455 with a larger area.

[0163] Therefore, in this embodiment, the additional cross-sectional area of ​​the metal component 405 can be ensured to increase the stability of the electrical connection when the unidirectional busbar 230 is electrically connected.

[0164] Since the cooling pipe 500 is substantially the same as or similar to that in the previous embodiment, its repeated description will be omitted below.

[0165] Figure 18 This is a diagram illustrating a battery pack according to another embodiment of the present disclosure. Figure 19 It is set in Figure 18 An exploded perspective view of the side wall of the side frame in the battery pack. Figure 20 It is set in Figure 19 A three-dimensional view of the metal components on the side wall. Figure 21 yes Figure 20 Side view of the metal component in the image. Figure 22 It is shown Figure 19 The image includes a cross-sectional view of the sidewall of the metal component, and Figure 23 yes Figure 22 The diagram includes a schematic enlarged view of the main components, including the sidewalls of the metal structure. Meanwhile, as in the previous embodiments, for ease of explanation, Figure 18 The configuration of the busbar covers 250 and 260 of the busbar assembly 200, which will be described later, is omitted here.

[0166] Since the battery pack 30 according to this embodiment is similar to the battery pack 10 of the previous embodiment, repeated descriptions of elements that are substantially the same or similar to those in the previous embodiment will be omitted, and the following description will be based on the differences from the previous embodiment.

[0167] Reference Figures 18 to 23 The battery pack 30 may include multiple battery cells 100, busbar assembly 200, cooling pipe 500, side frame 600 and metal components 700.

[0168] Since the multiple battery cells 100 are substantially the same or similar to those in the previous embodiments, their repeated descriptions will be omitted below.

[0169] Busbar assembly 200 may include sub-busbar unit 210 and busbar covers 250 and 260 (see...) Figure 7 For ease of explanation, Figure 18 Busbar covers 250 and 260 are omitted (see...) Figure 7 ).

[0170] The sub-bus unit 210 may include a bidirectional busbar 220 and a unidirectional busbar 230.

[0171] Since the bidirectional busbar 220 and the unidirectional busbar 230 are substantially the same as or similar to those in the previous embodiments, their repeated descriptions will be omitted below.

[0172] Since the cooling pipe 500 is substantially the same as or similar to that in the previous embodiment, its repeated description will be omitted below.

[0173] The side frame 600 may include a plurality of side structures 610 and a pair of sidewalls 630.

[0174] Since the multiple side structures 610 are substantially the same as or similar to the multiple side structures 310 in the previous embodiments, their repeated descriptions will be omitted below.

[0175] Each of the pair of sidewalls 630 may include a metal component receiving portion 650, a metal component placement portion 660, and a cell receiving portion 670.

[0176] The metal component receiving portion 650 can be formed as a multi-stage curved groove structure. Specifically, the metal component receiving portion 650 may include a first receiving portion 652, a second receiving portion 654, and a third receiving portion 656.

[0177] The first receiving portion 652 may be configured inside the sidewall 630 to have an elongated groove of a predetermined length in the height direction (Z-axis direction) of the sidewall 630.

[0178] The second receiving portion 654 can be bent from the upper end of the first receiving portion 652 (in the +Z axis direction) in the horizontal direction (Y axis direction) (specifically, in a width direction of the sidewall 630 (Y axis direction or -Y axis direction)) to extend a predetermined length.

[0179] The third receiving portion 656 can be bent from the end of the second receiving portion 654 in the height direction (Z-axis direction) of the side wall 630 (specifically, towards the upper end of the side wall 630 (in the +Z-axis direction)) to extend a predetermined length. The third receiving portion 656 can be connected to the metal component mounting portion 660, which will be described below.

[0180] The metal component mounting section 660 can be configured to have a shape and size corresponding to the busbar connection section 730 of the metal component 700, which will be described later.

[0181] Since the cell housing 670 is similar to the cell housing 338 in the previous embodiment, its repeated description will be omitted below.

[0182] The metal component 700 can be formed as a multi-stage bending structure. The metal component 700 may include an insertion portion 710 and a busbar connection portion 730.

[0183] The insertion part 710 may include a first insertion part 712, a second insertion part 714 and a third insertion part 716.

[0184] The first insertion portion 712 can be formed to have a predetermined length in the height direction (Z-axis direction) of the insertion portion 710. The second insertion portion 714 can be integrally bent from the upper end of the first insertion portion 712 to extend a predetermined length in the horizontal direction (Y-axis direction) of the insertion portion 710. The third insertion portion 716 can be bent from the end of the second insertion portion 714 in the height direction (Z-axis direction) of the insertion portion 710 (specifically, towards the top of the insertion portion 710 (in the +Z-axis direction)) to extend a predetermined length. In this embodiment, the cross-sectional area of ​​the insertion portion 710 can be increased by a multi-stage bending structure from the first insertion portion 712 to the third insertion portion 716, thereby further improving the stability of the electrical connection of the unidirectional connection busbar 230.

[0185] The first insertion part 712 can be inserted into the first receiving part 652, the second insertion part 714 can be inserted into the second receiving part 654, and the third insertion part 716 can be inserted into the third receiving part 656. In this embodiment, the separation of the metal member 700 from the sidewall 630 or the movement of the metal member 700 caused by the multi-stage curved metal member receiving part 650 of the sidewall 630 and the insertion part 710 of the multi-stage curved metal member 700 (which is inserted into the multi-stage curved metal member receiving part 650) within the sidewall 630 can be prevented more reliably.

[0186] The busbar connector 730 may include a connector body 732 and a protrusion 735.

[0187] The connecting body 732 can be bent from the upper end of the third insertion part 716 in a direction opposite to the bending direction of the second insertion part 714, so as to have a predetermined length in the horizontal direction (Y-axis direction).

[0188] The protrusion 735 can be formed to protrude integrally from the connecting body 732. One end of the connecting body 732 can extend integrally with the third insertion portion 716, and the other end of the connecting body 732 can extend integrally with the protrusion 735.

[0189] Multiple protrusions 735 may be provided. The multiple protrusions 735 may be configured to protrude in the width direction (Y-axis direction) of the sidewall 630 to a position near the protruding end of the cell receiving portion 670.

[0190] Therefore, in this embodiment, the cross-sectional area of ​​the protrusion 735 can be maximized on the sidewall 630 to further increase the stability of the electrical connection of the unidirectional busbar 230.

[0191] Figure 24This is a diagram illustrating a battery pack according to another embodiment of the present disclosure. Figure 25 It is shown Figure 24 A diagram showing the unidirectional connection of the sub-busbar units in the busbar assembly of the battery pack. Figure 26 It shows the basis Figure 24 A diagram of a unidirectionally connected busbar in another embodiment of the busbar assembly of the battery pack, and... Figure 27 It is shown Figure 24 The diagram shows the unidirectional connection between the busbar assembly of the battery pack and the metal component. Also, as in the previous embodiment, for ease of explanation, in... Figure 24 and Figure 27 The configuration of the busbar cover of the busbar assembly 800, which will be described later, is omitted here.

[0192] Since the battery pack 40 according to this embodiment is similar to the battery pack 30 of the previous embodiment, repeated descriptions of elements that are substantially the same or similar to those in the previous embodiment will be omitted. The following description will be based on the differences from the previous embodiment.

[0193] Reference Figures 24 to 27 The battery pack 40 may include multiple battery cells 100, cooling pipes 500, side frames 600, metal components 700, and busbar assembly 800.

[0194] Since the multiple battery cells 100 and cooling pipes 500 are substantially the same or similar to those in the previous embodiments, their repeated descriptions will be omitted below.

[0195] The side frame 600 may include a plurality of side structures 610 and a pair of sidewalls 630.

[0196] Since the multiple side structures 610 are substantially the same or similar to those in the previous embodiments, their repeated descriptions will be omitted below.

[0197] Each of the pair of sidewalls 630 may include a metal component receiving portion 650, a metal component placement portion 660, and a cell receiving portion 670.

[0198] Since the metal component receiving portion 650, the metal component placement portion 660 and the battery cell receiving portion 670 are substantially the same as or similar to those in the previous embodiments, their repeated descriptions will be omitted below.

[0199] The metal component 700 may include an insertion portion 710 and a busbar connection portion 730.

[0200] Since the insertion part 710 is substantially the same as or similar to that in the previous embodiment, its repeated description will be omitted below.

[0201] The busbar connector 730 may include a connector body 732 and a plurality of protrusions 735.

[0202] Since the connecting body 732 and the plurality of protrusions 735 are substantially the same or similar to those in the previous embodiments, their repeated descriptions will be omitted below.

[0203] The busbar assembly 800 may include a sub-busbar unit 810 and a busbar cover. The busbar cover is similar to busbar cover 250 or 260 in previous embodiments (see...). Figure 7 They are roughly the same or similar; for ease of explanation, they are referred to as such. Figure 24 and Figure 27 Omitted in .

[0204] The sub-bus unit 810 may include a bidirectional busbar 820 and a unidirectional busbar 830.

[0205] Multiple bidirectional busbars 820 can be provided, each bidirectional busbar including a busbar body 822 and electrode connection portions 824 and 826. Electrode connection portions 824 and 826 may include a positive electrode connection portion 824 and a negative electrode connection portion 826. Since the busbar body 822, the positive electrode connection portion 824, and the negative electrode connection portion 826 are the same as or similar to the busbar body 222, the positive electrode connection portion 224, and the negative electrode connection portion 226 in the previous embodiment, their repeated description will be omitted below.

[0206] Multiple unidirectional busbars 830 and 840 can be provided, each unidirectional busbar including busbar bodies 832 and 842 and electrode connection portions 834, 836, 844, and 846. Electrode connection portions 834, 836, 844, and 846 may include positive electrode connection portions 834 and 844 and negative electrode connection portions 836 and 846. For example... Figure 25 As shown, the unidirectional busbar 830 can be configured as only one of the positive terminal connection portion 834 and the negative terminal connection portion 836 provided on the busbar body 832. Furthermore, as... Figure 26 As shown, the unidirectional busbar 840 can also be configured to have a positive electrode connection portion 844 and a negative electrode connection portion 846 disposed on a busbar body 842. The structural shape of the unidirectional busbar 830 or 840 can be determined based on design considerations regarding the type of electrical connection with the battery cell 100 or the type of arrangement on the sidewall 630.

[0207] The unidirectional busbars 830 and 840 may include cross-sectional reinforcements 838 and 848.

[0208] Cross-sectional reinforcements 838 and 848 can be integrally provided with busbar bodies 832 and 842. These cross-sectional reinforcements 838 and 848 can be formed to protrude from busbar bodies 832 and 842 by a predetermined length to ensure a predetermined cross-sectional area.

[0209] In this embodiment, the cross-sectional area of ​​the unidirectional busbar 830 or 840 can be further increased by the cross-sectional reinforcement portion 838 or 848, thereby further improving the stability of the electrical connection of the unidirectional busbar 830 or 840.

[0210] Multiple cross-sectional reinforcing portions 838 and 848 can be provided. Multiple cross-sectional reinforcing portions 838 and 848 can be disposed between electrode connecting portions 834, 836, 844 and 846.

[0211] Multiple cross-sectional reinforcements 838 and 848 can be formed to protrude in the same direction as the protruding direction of electrode connection portions 834, 836, 844 and 846 in one width direction (+Y axis direction or -Y axis direction) of busbar body 832 or 842.

[0212] Multiple cross-sectional reinforcements 838 and 848 can be configured to correspond to the shape of multiple protrusions 735 of the busbar connection portion 730 of the metal member 700. The multiple cross-sectional reinforcements 838 and 848 can be disposed on the multiple protrusions 735 to contact the busbar connection portion 730 of the metal member 700 that unidirectionally connects the busbar 830. In this case, the multiple cross-sectional reinforcements 838 and 848 can be configured to almost or completely overlap with the multiple protrusions 735. The overlapping portions of the multiple cross-sectional reinforcements 838 and 848 with the multiple protrusions 735 can be welded (see W) by means of welding such as laser welding. Figure 15 )connect.

[0213] Therefore, in this embodiment, welding accuracy can be further improved during the welding process of the unidirectional connecting busbars 830 and 840 with the metal component 700, and operational convenience can be ensured during the welding process.

[0214] Figure 28 This is a diagram illustrating a vehicle according to an embodiment of the present disclosure.

[0215] Reference Figure 28 The vehicle 1 according to embodiments of the present disclosure may include at least one battery pack 10, 20, 30, or 40 according to the present disclosure. Furthermore, in addition to the battery pack 10, 20, 30, or 40, the vehicle 1 according to embodiments of the present disclosure may further include various other components included in the vehicle. For example, in addition to the battery pack 10, 20, 30, or 40 according to embodiments of the present disclosure, the vehicle 1 according to embodiments of the present disclosure may also include a body, a motor, and control devices such as an electronic control unit (ECU).

[0216] Furthermore, the battery packs 10, 20, 30 or 40 according to embodiments of this disclosure can also be applied to other devices, instruments or equipment (such as energy storage systems) that use secondary batteries, as well as vehicle 1.

[0217] According to the various embodiments described above, a battery pack 10, 20, 30 or 40 that can maximize energy density while ensuring the stability of the electrical connection structure, and a vehicle 1 including the battery pack, can be provided.

[0218] Furthermore, according to the various embodiments described above, a battery pack 10, 20, 30 or 40 that can further improve structural rigidity and a vehicle 1 including the battery pack can be provided.

[0219] As described above, although this disclosure has been described with reference to limited embodiments and drawings, this disclosure is not limited thereto, and those skilled in the art to which this disclosure pertains can make various modifications and variations within the scope of the technical concept of this disclosure and the equivalents of the appended claims.

Claims

1. A battery pack, the battery pack comprising: Multiple battery cells; A busbar assembly, the busbar assembly being disposed on one side of the plurality of battery cells, and including sub-busbar units connected to the electrodes of the plurality of battery cells; as well as A side frame configured to support the plurality of battery cells at the bottom of the busbar assembly, and including a metal member connected to the sub-busbar unit.

2. The battery pack according to claim 1, in, The sub-busbar unit includes: A bidirectional busbar, the bidirectional busbar being connected to the electrodes of the battery cell on both sides of the sub-busbar unit in the width direction; and A unidirectional busbar is provided, which is connected to the electrode of the battery cell on one side of the sub-busbar unit in the width direction. The metal component is connected to the unidirectional busbar.

3. The battery pack according to claim 2, in, A portion of the metal component contacts the unidirectional busbar at the top of the side frame, and The remaining portion of the metal component is inserted into the side frame.

4. The battery pack according to claim 2, in, The metal member is inserted into the side frame, and one end of the metal member is bent to connect to the unidirectional busbar at the top of the side frame.

5. The battery pack according to claim 2, in, The metal component includes: An insertion part, which is inserted into the side frame; and A busbar connection portion, which is bent from the insertion portion to connect to the unidirectional connecting busbar outside the side frame.

6. The battery pack according to claim 5, in, The busbar connection portion includes: A connecting body, the connecting body being formed to have a predetermined length in the longitudinal direction of the unidirectional connecting busbar; and A protrusion extends a predetermined length from the connecting body toward the unidirectional connecting busbar, thereby contacting the unidirectional connecting busbar.

7. The battery pack according to claim 6, in, The protrusion is welded to the unidirectional busbar.

8. The battery pack according to claim 6, in, The protrusion is configured in a trapezoidal shape.

9. The battery pack according to claim 6, in, The protrusion is configured as a plurality of protrusions. The plurality of protrusions are configured to be spaced apart from each other by a predetermined distance in the longitudinal direction of the connecting body.

10. The battery pack according to claim 7, in, The plurality of protrusions are disposed between the plurality of battery cells in the longitudinal direction of the connecting body.

11. The battery pack according to claim 2, in, The unidirectional busbar is located on the outermost portions of both sides of the sub-busbar unit, and The metal components are located on the outermost portions of both sides of the side frame.

12. The battery pack according to claim 1, in, The side frame includes: Multiple side structures configured to support the multiple battery cells; and A pair of sidewalls, the pair of sidewalls being disposed on the outermost portions of both sides of the plurality of side structures, and The metal component is disposed on the pair of sidewalls.

13. The battery pack according to claim 1, in, The metal components are installed onto the side frame using an insert molding process.

14. The battery pack according to claim 1, in, The metal component is made of aluminum.

15. The battery pack according to claim 1, in, The thickness of the metal component is at least 2 mm.

16. A vehicle comprising at least one battery pack according to any one of claims 1 to 15.

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