Battery pack and vehicle

Abstract

The present invention provides a battery pack for improving space efficiency at a mounting site and a vehicle including the same. The battery pack according to the present invention for achieving the object includes at least one battery module; and a cooling unit having a refrigerant passage formed to allow a refrigerant to flow therein, having a plate shape to allow the at least one battery module to be mounted thereon, and including a protruding portion protruding in an upward direction and / or a recessed portion recessed in a downward direction, the protruding portion having a portion in which the battery module is not mounted, the recessed portion having another portion in which the battery module is not mounted.

Description

Technical Field

[0001] This disclosure relates to a battery pack and a vehicle including the battery pack, and more specifically, to a battery pack and a vehicle including the battery pack that improves the space efficiency of the installation site.

[0002] This application claims priority to Korean Patent Application No. 10-2020-0138666, filed in Korea on October 23, 2020, the disclosure of which is incorporated herein by reference. Background Technology

[0003] Recently, with the rapid growth in demand for portable electronic products such as laptops, cameras, and mobile phones, and the vigorous research and development of electric vehicles, energy storage batteries, robots, and satellites, high-performance rechargeable batteries that can be repeatedly charged and discharged are being actively researched.

[0004] Currently available rechargeable batteries include nickel-cadmium (NiCd), nickel-metal hydride (NiMH), nickel-zinc (NiZn), and lithium-ion batteries. Among these, lithium-ion batteries have attracted much attention due to their advantages such as free charging and discharging, extremely low self-discharge rate, and high energy density, as they have virtually no memory effect compared to nickel-based batteries.

[0005] This type of lithium-ion secondary battery primarily uses lithium-based oxide and carbon materials as the positive and negative electrode active materials, respectively. The lithium-ion secondary battery also includes: an electrode assembly, in which positive and negative electrode plates, coated with the positive and negative electrode active materials respectively, are arranged with a separator placed between them; and a sheath material (i.e., the battery casing), which seals and contains the assembly along with the electrolyte solution. Multiple lithium-ion secondary batteries can be included in a battery pack.

[0006] Recently, there has been an increasing demand for high-capacity battery packs used in electric vehicles and other applications. Although these battery packs need to be installed in the narrow interior space of a vehicle, various internal components such as electric motors and power transmission devices are also installed in the vehicle in addition to the battery pack. Therefore, ensuring sufficient storage space to accommodate the battery pack is not easy.

[0007] Furthermore, when there are circular components at the installation site of the battery pack, or when the mounting base is convex, a large amount of dead space (empty space) is generated between the battery pack and the storage space in the relevant technology, which leads to a problem of deterioration in the vehicle's space efficiency. Summary of the Invention

[0008] Technical issues

[0009] This disclosure aims to address the problems of the related technology, and therefore aims to provide a battery pack that improves the space efficiency of the installation site and a vehicle including the battery pack.

[0010] These and other objects and advantages of this disclosure will become apparent from the following detailed description and from exemplary embodiments thereof. Furthermore, it will be readily understood that the objects and advantages of this disclosure can be achieved by means shown in the appended claims and combinations thereof.

[0011] Technical solution

[0012] In one aspect of this disclosure, a battery pack is provided.

[0013] The battery pack includes: at least one battery module; and

[0014] A cooling unit having a refrigerant channel configured to allow refrigerant to flow therein, having a plate shape such that the at least one battery module is mounted on the cooling unit, and the cooling unit including at least one of a protrusion and a recess, wherein a portion of the protrusion on which the battery module is not mounted protrudes in an upward direction, and another portion of the recess on which the battery module is not mounted is recessed in a downward direction.

[0015] In addition, the battery pack may also include an electrical module configured to control the charging and discharging of the battery module.

[0016] The electrical module is positioned facing at least one of the protrusion and the recess of the cooling unit, and includes at least one curved surface.

[0017] The battery pack may further include a heat transfer member having one side configured to connect to the electrical module and another side in contact with the battery module, and the heat transfer member having at least one curved surface facing at least one of the protrusion and the recess of the cooling unit.

[0018] Furthermore, the heat transfer component,

[0019] It may have an internal space configured to accommodate cables that electrically connect the electrical module and the battery module.

[0020] Furthermore, the battery module may include a connecting portion that extends outward from one side and has a first bolt hole formed therein.

[0021] And the heat transfer component described therein,

[0022] It may include a support portion having a second bolt hole formed therein for connection to the connection portion of the battery module.

[0023] Moreover, the battery pack,

[0024] It may also include,

[0025] A front panel, which is connected to the front end of the cooling unit;

[0026] Rear panel, the rear panel being connected to the rear end of the cooling unit;

[0027] Left plate, the left plate being connected to the left end of the cooling unit; and

[0028] The right plate is connected to the right end of the cooling unit.

[0029] In addition, the battery pack may also include a column member having two ends extending from the left side to the right side of the electrical module to support the left plate and the right plate respectively, and having at least one curved surface facing at least one of the protrusion and the recess of the cooling unit.

[0030] In addition, column members may include,

[0031] A receiving portion, the receiving portion being located on the protrusion of the cooling unit and recessed in an upward direction such that the protrusion is inserted; and

[0032] A protruding portion, which is located on the recess of the cooling unit and protrudes downward to be inserted into the recessed space of the recess.

[0033] Furthermore, in another aspect of this disclosure, a vehicle comprising at least one battery pack is provided.

[0034] Additionally, the vehicle may include a body configured to mount the battery pack thereon.

[0035] Furthermore, a portion of the vehicle body is configured to be inserted into a recessed space formed by the protrusion of the cooling unit.

[0036] Technical effect

[0037] According to one aspect of this disclosure, the cooling unit includes at least one protrusion and a recess. Therefore, even when a circular component is present at the mounting location of the battery pack, or when the mounting base plate is convex, at least a portion of the circular component or the convex mounting base plate can be accommodated in the recessed space of the protrusion of the cooling unit, thereby effectively improving the space utilization of the mounting location. Specifically, when the space for accommodating the battery pack is narrow (e.g., in a vehicle), the occurrence of dead space (empty space) that the battery pack may generate can be minimized. Attached Figure Description

[0038] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the foregoing disclosure, serve to provide a further understanding of the technical features of the present disclosure. Therefore, the present disclosure should not be construed as limited to the drawings.

[0039] Figure 1 This is a perspective view schematically illustrating a battery pack according to an embodiment of the present disclosure.

[0040] Figure 2 An exploded perspective view of a battery pack according to an embodiment of the present disclosure is shown schematically.

[0041] Figure 3 This is a perspective view schematically illustrating a cooling unit of a battery pack according to an embodiment of the present disclosure.

[0042] Figure 4 This is a schematic illustration of the bottom perspective view of the cooling unit of a battery pack according to an embodiment of the present disclosure.

[0043] Figure 5 This is a schematic illustration of a vertical cross-sectional view of some components of a battery pack according to an embodiment of the present disclosure.

[0044] Figure 6 It is an illustrative example Figure 5 A magnified view of a portion of the battery pack.

[0045] Figure 7 This is a perspective view schematically illustrating some components of a battery pack according to another embodiment of the present disclosure.

[0046] Figure 8 This is a perspective view illustrating a column member of a battery pack according to another embodiment of the present disclosure.

[0047] Figure 9 This is a perspective view schematically illustrating a vehicle according to an embodiment of the present disclosure.

[0048] Figure 10 This is a schematic illustration of a partial front view of the interior components of a vehicle according to an embodiment of the present disclosure. Detailed Implementation

[0049] Preferred embodiments of the present disclosure will be described in detail below 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 common and dictionary meanings, but rather interpreted based on the meanings and concepts corresponding to the technical aspects of the present disclosure, on the basis of allowing the inventors to appropriately define the terminology for the purpose of obtaining the best interpretation.

[0050] Therefore, the description presented herein is merely a preferred example for illustrative purposes only and is not intended to limit the scope of this disclosure. It should be understood that other equivalent substitutions and modifications may be made thereto without departing from the scope of this disclosure.

[0051] Figure 1 This is a perspective view schematically illustrating a battery pack according to an embodiment of the present disclosure. Figure 2 An exploded perspective view of a battery pack according to an embodiment of the present disclosure is shown schematically. Figure 3 This is a perspective view schematically illustrating a cooling unit of a battery pack according to an embodiment of the present disclosure. Figure 4 This is a schematic illustration of the bottom perspective view of the cooling unit of a battery pack according to an embodiment of the present disclosure.

[0052] Reference Figures 1 to 4 According to embodiments of the present disclosure, the battery pack 100 includes at least one battery module 110 and a cooling unit 120.

[0053] Specifically, the battery module 110 may include a plurality of battery cells (not shown) and a module housing 111 therein containing the plurality of battery cells. The battery cells may be lithium secondary batteries. The battery cells may be pouch-type battery cells, which include electrode assemblies (not shown), electrolyte (not shown), and a pouch therein containing the electrode assemblies and electrolyte. However, the battery module 110 according to this disclosure is not limited to the pouch-type battery cells described above. For example, the battery cells may be cylindrical battery cells. That is, various types of secondary batteries disclosed at the time of filing of this disclosure may be used as battery cells.

[0054] The battery module 110 may include at least one busbar (not shown) or power line (not shown) configured to electrically interconnect a plurality of battery cells. Specifically, the busbar may include a conductive metal, such as copper, aluminum, nickel, etc.

[0055] Additionally, the module housing 111 may include an electrically insulating material. For example, the module housing 111 may be made of polyvinyl chloride (PVC). The module housing 111 may include a space capable of accommodating multiple battery cells. The module housing 111 may generally have a rectangular box shape.

[0056] Furthermore, the battery pack 100 of this disclosure may include sensing cables 162 electrically connected between a plurality of battery modules 110 and an electrical module 160. Figure 6 The sensing cable can be configured to transmit electrical signals to measure the current or temperature of the battery module 110. As for the detailed configuration of the battery module 110, commonly known configurations can be applied, and therefore, their detailed description is not provided here. Furthermore, the battery pack 100 may also include power lines (not shown) that electrically connect multiple battery modules.

[0057] Furthermore, the cooling unit 120 can be integrally manufactured by extrusion molding. In this disclosure, the cooling unit 120 is integrally manufactured by extrusion molding, thus increasing airtightness compared to related technologies that manufacture by combining two components, thereby preventing refrigerant leakage to the outside, and allowing for free variation in the shape of the cooling unit 120 without being limited to a flat plate shape. The cooling unit 120 may include an inlet 122 for injecting refrigerant and an outlet 123 for discharging refrigerant. The inlet 122 and outlet 123 may be configured to communicate with a refrigerant channel 121 formed inside the cooling unit 120.

[0058] A refrigerant passage 121, configured to allow refrigerant flow therethrough, may be formed in the cooling unit 120. The refrigerant passage 121 may have a shape extending in a front-rear direction. The cooling unit 120 may include a partition wall W separating the refrigerant passage 121. The cooling unit 120 may be configured to allow at least one battery module 110 to be mounted thereon.

[0059] Furthermore, the cooling unit 120 may have a plate shape in which the upper and lower surfaces are wider than the side surfaces. The cooling unit 120 may have a flat surface on which the portion of the battery module 110 mounted extends horizontally.

[0060] Additionally, the cooling unit 120 may include at least one of a protrusion 124 and a recess 125. The protrusion 124 may be a portion of the cooling unit 120 from which the battery module 110 is not installed. The protrusion 124 may have a convex shape in an upward direction. The recess 125 may be another portion of the cooling unit 120 from which the battery module 110 is not installed. The recess 125 may have a concave shape in a downward direction. For example, as... Figure 3 As shown, two protrusions 124 at the center of the cooling unit 120 in the left-right direction (X-axis direction) and a recess 125 between the two protrusions 124 may also be provided.

[0061] Reference Figure 4Due to the shape of the upward-protruding convex portion 124 of the cooling unit 120, a recessed space 124b can be formed in the lower portion of the convex portion 124. Conversely, due to the concave shape of the recess 125 in the downward direction, the lower portion of the recess 125 can protrude in the downward direction.

[0062] Therefore, according to this configuration of the present disclosure, the present disclosure includes a cooling unit 120, which includes at least one protrusion 124 and a recess 125. Thus, even when a circular component is present at the mounting location of the battery pack 100, or when the mounting base plate is convex, at least a portion of the circular component or the convex mounting base plate can be accommodated in the recessed space 124b of the recess of the cooling unit, thereby effectively improving the space efficiency of the mounting location. Specifically, when the housing space of the battery pack 100 is narrow (e.g., in a vehicle), the occurrence of dead space (empty space) that may be generated by the battery pack 100 can be minimized.

[0063] Figure 5 This is a schematic illustration of a vertical cross-sectional view of some components of a battery pack according to an embodiment of the present disclosure.

[0064] Again, along with Figure 2 and Figure 3 Refer to together Figure 5 The battery pack 100 according to embodiments of this disclosure may further include an electrical module 160. The electrical module 160 may include control elements (not shown) to control the charging and discharging of the battery module 110. The electrical module 160 may include a BMS board, relays, fuses, sensing cables, etc., as control elements. Commonly known configurations can be applied to the control elements of the electrical module 160. Therefore, detailed descriptions of these control elements will be omitted.

[0065] Furthermore, the electrical module 160 may include an electrically insulated electrical housing 161 configured to house control elements therein. The electrical housing 161 may be positioned facing at least one of the protrusions 124 and recesses 125 of the cooling unit 120. The electrical housing 161 may have a shape corresponding to at least one of the protrusions 124 and recesses 125. That is, the electrical housing 161 may have at least one first curved surface 160a. For example, refer to… Figure 5 The electrical module 160 may include a first curved surface 160a configured to face each of the two protrusions 124 and formed to be recessed inward along the body, and a first curved surface 160a configured to face the recess 125 and formed to be protruding outward from the body.

[0066] Therefore, according to this configuration of the present disclosure, the present disclosure also includes an electrical module 160 positioned facing at least one of the protrusions 124 and recesses 125 of the cooling unit 120, and including at least one first curved surface 160a, thereby effectively utilizing the internal space of the battery pack 100. Furthermore, in this disclosure, the heat generated in the electrical module 160 can be transferred to the cooling unit 120 through the large thermally conductive area of ​​the first curved surface 160a, thus effectively increasing the cooling efficiency of the electrical module 160.

[0067] Furthermore, again, along with Figure 2 and Figure 3 Refer to together Figure 5 The battery pack 100 according to embodiments of the present disclosure may further include a heat transfer member 170. The heat transfer member 170 may include a material with excellent thermal conductivity to receive heat generated from the battery module 110 and transfer the heat to the cooling unit 120. For example, the heat transfer member 170 may include an aluminum alloy or stainless steel. An electrically insulating coating may be formed on the outer surface of the heat transfer member 170. For example, the electrically insulating coating may be a polymer resin.

[0068] The heat transfer member 170 can be configured such that one side of it is connected to the electrical module 160. For example, one surface of the heat transfer member 170 can be bonded to the electrical module 160. Alternatively, the heat transfer member 170 can be connected to the electrical module 160. The heat transfer member 170 can be integrally formed with the electrical module 160. For example, as... Figure 5 As shown, the left or right surface of the heat transfer member 170 can be configured to connect to the side surface of the electrical module 160.

[0069] Additionally, the heat transfer member 170 can be configured such that its other side contacts the battery module 110. For example, as Figure 5 As shown, the left or right surface of the heat transfer member 170 can be configured to contact the side surface of the battery module 110.

[0070] Furthermore, the heat transfer member 170 may be configured to face at least one of the protrusions 124 and recesses 125 of the cooling unit 120. The cooling unit 120 may include at least one second curved surface 170a. For example, as Figure 5 As shown, the heat transfer member 170 may include a second curved surface 170a configured to face the upper surface of the protrusion 124.

[0071] Therefore, according to this configuration of the present disclosure, the present disclosure also includes a heat transfer member 170 comprising at least one second curved surface 170a, thereby effectively transferring the heat generated from the battery module 110 to the cooling unit 120. Thus, the battery pack 100 of the present disclosure can significantly improve cooling efficiency.

[0072] Figure 6 It is an illustrative example Figure 5 A magnified view of a portion of the battery pack.

[0073] Again, along with Figure 2 , Figure 3 and Figure 5 Refer to together Figure 6 The heat transfer member 170 may include an internal space S configured to accommodate a cable. For example, the cable may be a sensing cable 162 configured to sense current. The sensing cable 162 may be configured to electrically connect the connection terminal of the electrical module 160 and the external terminal of the battery module 110. That is, the heat transfer member may include: a movable channel extending in a left-right direction through which the sensing cable 162 may pass; and an inlet and outlet of partially perforated sections.

[0074] Therefore, according to this configuration of the present disclosure, the present disclosure includes an internal space S capable of accommodating the sensing cable 162, thereby facilitating the electrical connection between the battery module 110 and the electrical module 160. Thus, the present disclosure can improve the utilization of the internal space of the battery pack 100 and improve manufacturing efficiency.

[0075] In addition, refer to again Figure 6 The battery module 110 may include a connecting portion 112 extending outward from one side and having a first bolt hole H1 therein. The heat transfer member 170 may include a support portion 172 having a second bolt hole H2 with threads formed therein for connection to the connecting portion 112 of the battery module 110. The first bolt hole H1 in the connecting portion 112 and the second bolt hole H2 in the support portion 172 may be configured to communicate with each other. That is, the first bolt hole H1 and the second bolt hole H2 may be configured such that a fastening bolt B can pass through the first bolt hole H1 and the second bolt hole H2, thereby fastening the connecting portion 112 and the support portion 172 to each other.

[0076] Therefore, according to this configuration, the present disclosure is configured to connect the connecting portion 112 in the battery module 110 and the supporting portion 172 in the heat transfer member 170 to each other by bolts. Thus, not only can the battery module 110 be stably fixed on the cooling unit 120, but the heat transfer member 170 can also be stably kept in close contact with the battery module 110, thereby effectively improving the cooling performance of the battery module 110.

[0077] In addition, refer to again Figure 1 and Figure 2According to embodiments of the present disclosure, the battery pack 100 may include a top cover 130, a front panel 141, a rear panel 142, a left panel 151, and a right panel 152.

[0078] The top cover 130 may be located on the upper portion of a plurality of battery modules 110. The top cover 130 may have a plate shape extending horizontally to cover the upper portion of the plurality of battery modules 110. The top cover 130 may be configured to be attached to the upper end of each of the front panel 141, the rear panel 142, the left panel 151, and the right panel 152.

[0079] The front panel 141 can be configured to be connected to the front end of the cooling unit 120. A portion of the front panel 141 can have a shape corresponding to a protrusion 124 and a recess 125 at the front end of the cooling unit 120. That is, the lower surface of the front panel 141 can have a curved surface 141a formed to be recessed in the upward direction to correspond to the protrusion 124. The lower surface of the front panel 141 can have a curved surface 141a protruding in the downward direction to correspond to the recess 125.

[0080] Additionally, the rear plate 142 may have a shape corresponding to the protrusion 124 and recess 125 at the rear end of the cooling unit 120. That is, the lower surface of the rear plate 142 may have a curved surface 142a formed to be recessed in the upward direction to correspond to the protrusion 124. The lower surface of the rear plate 142 may have a curved surface 142a protruding in the downward direction to correspond to the recess 125.

[0081] Furthermore, the left plate 151 can be configured to connect to the left end of the cooling unit 120. A third bolt hole H3, configured to be bolted to the connection portion 112 of the battery module 110, can be formed in the left plate 151. The third bolt hole H3 can be threaded. The third bolt hole H3 can be configured to communicate with the first bolt hole H1 formed in the connection portion 112 of the battery module 110.

[0082] Additionally, the right plate 152 can be configured to connect to the right end of the cooling unit 120. A third bolt hole H3, configured to be bolted to the connection portion 112 of the battery module 110, can be formed in the right plate 152. The third bolt hole H3 can be threaded. The third bolt hole H3 can be configured to communicate with the first bolt hole H1 formed in the connection portion 112 of the battery module 110.

[0083] Therefore, according to this configuration of the present disclosure, the connecting portion 112 of the battery module 110 can be fixed to the left plate 151 or the right plate 152 in which the third bolt hole H3 is formed, so the battery module 110 can be stably mounted on the cooling unit 120. Therefore, the battery pack 100 of the present disclosure can increase durability.

[0084] Figure 7 This is a perspective view schematically illustrating some components of a battery pack according to another embodiment of the present disclosure. Figure 8 This is a perspective view schematically illustrating a column member of a battery pack according to another embodiment of the present disclosure. For reference, and for ease of illustration, Figure 7 The battery module 110, electrical module 160, and heat transfer component 170 are omitted from this description, but a battery pack according to another embodiment of this disclosure may include (like...) Figure 2 (Like a battery pack) Battery module 110, electrical module 160 and heat transfer component 170.

[0085] Reference Figure 7 and Figure 8 , and according to Figure 2 Compared to the battery pack 100 of the previous embodiment, the battery pack 100 according to another embodiment of the present disclosure may further include a pillar member 180. The pillar member 180 may be located between two battery modules 110 arranged in the front-to-back direction (Y-axis direction). For example, as... Figure 7 As shown, the two column members 180 can be located between the battery modules 110 arranged in the front-to-back direction.

[0086] Additionally, the two ends of the column member 180 along its length (X-axis direction) can be configured to support the left plate 151 and the right plate 152, respectively. The column member 180 may have a shape that extends elongated from the left to the right side of the electrical module 160.

[0087] Furthermore, the lower portion of the column member 180 can be configured to face at least one of the protrusions 124 and recesses 125 of the cooling unit 120. That is, the lower surface of the column member 180 can be at least one third curved surface 180a, which has a shape corresponding to at least one of the protrusions 124 and recesses 125 of the cooling unit 120. The column member 180 can be made of steel or stainless steel with excellent mechanical rigidity.

[0088] Additionally, the column member 180 may include a receiving portion 181 and a protruding portion 182. The receiving portion 181 may be configured to be located on the protrusion 124 of the cooling unit 120. The receiving portion 181 may have a shape that is recessed in the upward direction so that the protrusion 124 can be inserted. The protruding portion 182 may be located on the recess 125 of the cooling unit 120. The protruding portion 182 may have a shape that protrudes in the downward direction so as to be inserted into the space recessed in the downward direction in the recess 125.

[0089] Therefore, according to this configuration, the present disclosure also includes a pillar member 180 configured to face at least one of the protrusions 124 and recesses 125 of the cooling unit 120, thereby protecting the battery module 110 mounted thereon from external impact due to the high mechanical rigidity of the pillar member 180. Thus, the battery pack 100 of the present disclosure can improve safety.

[0090] Figure 9 This is a perspective view schematically illustrating a vehicle according to an embodiment of the present disclosure.

[0091] Reference Figure 9 The vehicle 200 according to embodiments of the present disclosure may include at least one or more battery packs 100 and a body including a housing space for accommodating the battery packs 100. For example, the vehicle 200 may be an electric vehicle 200, an electric scooter, an electric wheelchair, or an electric bicycle.

[0092] Figure 10 This is a schematic illustration of a partial front view of the interior components of a vehicle according to an embodiment of the present disclosure.

[0093] Reference Figure 9 and Figure 10 The vehicle 200 according to embodiments of this disclosure may further include a body 210 configured to mount the battery pack 100 thereon. Furthermore, a portion of the body 210 may be configured to insert into a protrusion 124 of the cooling unit 120. The portion of the body 210 may have an upward convex shape. For example, as... Figure 10 As shown, an upward-directing protrusion 210a, corresponding to the protrusion 124 provided in the cooling unit 120, can be formed in the vehicle body 210. The protrusion 210a of the vehicle body 210 can be inserted into the recessed space in the lower portion of the protrusion 124 formed in the cooling unit 120. Additionally, a downward-directing recess 210b, corresponding to the recess 125 of the cooling unit 120, can be formed in the vehicle body 210. The recess 125 of the cooling unit 120 can be mounted on the recess 210b of the vehicle body 210.

[0094] Therefore, according to this configuration of the present disclosure, the vehicle 200 of the present disclosure is configured such that a portion of the body 210 is inserted into the recessed space formed by the protrusion 124 of the cooling unit 120, thereby effectively improving the space efficiency on the mounting side of the battery pack 100. Specifically, when the accommodating space of the battery pack 100 is as narrow as in the vehicle 200, the dead space generated by the battery pack 100 can be minimized.

[0095] At the same time, although terms such as up, down, left, right, front, and back are used here to indicate direction, these terms are only for ease of description and it will be obvious to those skilled in the art that these terms may vary depending on the position of the target object or the position of the observer.

[0096] This disclosure has been described in detail. However, it should be understood that while the detailed description and specific examples indicate preferred embodiments of this disclosure, they are given by way of example only, because various variations and modifications within the scope of this disclosure will become apparent to those skilled in the art based on the detailed description.

Claims

1. A battery pack comprising: at least one battery module; a cooling unit having a refrigerant passage configured to allow a refrigerant to flow therein, the cooling unit having a plate shape such that the at least one battery module is mounted thereon, and the cooling unit including at least one of a convex portion in which a portion on which the battery module is not mounted protrudes in an upward direction, and a concave portion in which another portion on which the battery module is not mounted is recessed in a downward direction; an electrical module configured to control charging and discharging of the battery module, wherein the electrical module is positioned to face the at least one of the convex portion and the concave portion of the cooling unit, and includes at least one curved surface; and a heat transfer member having one side configured to be connected to the electrical module and the other side configured to be in contact with the battery module, and the heat transfer member having at least one curved surface facing the at least one of the convex portion and the concave portion of the cooling unit. 2.The battery pack of claim 1, further comprising a sensing cable electrically connected between the battery module and the electrical module, and the sensing cable is configured to transmit an electrical signal to measure a current or a temperature of the battery module. 3.The battery pack of claim 1, wherein the heat transfer member has an internal space configured to accommodate a cable electrically connecting the electrical module and the battery module. 4.The battery pack of claim 1, wherein, the battery module includes a coupling portion extending in an outward direction from one side surface and having a first bolt hole formed therein, and wherein the heat transfer member includes a support portion having a second bolt hole formed therein to be coupled to the coupling portion of the battery module. 5.The battery pack of claim 1, further comprising: a front plate coupled to a front end of the cooling unit; a rear plate coupled to a rear end of the cooling unit; a left plate coupled to a left end of the cooling unit; and a right plate coupled to a right end of the cooling unit. 6.The battery pack of claim 5, further comprising: a pillar member having both ends extending from a left side to a right side of the electrical module to support the left plate and the right plate, respectively, and having at least one curved surface facing the at least one of the convex portion and the concave portion of the cooling unit.

7. The battery pack of claim 6, wherein, The pillar member is steel having excellent mechanical rigidity.

8. The battery pack of claim 7, wherein, The pillar member is stainless steel.

9. The battery pack of claim 6, wherein, The pillar member includes: an accommodation portion located on the convex portion of the cooling unit and recessed in an upward direction such that the convex portion is inserted; and a protruding portion located on the concave portion of the cooling unit and protruding in a downward direction to be inserted into a recessed space of the concave portion.

10. The battery pack of claim 1, wherein, The plate shape of the cooling unit is a shape in which an upper surface and a lower surface are wider than side surfaces.

11. A vehicle comprising at least one battery pack according to any one of claims 1 to 10.

12. The vehicle according to claim 11, further comprising a vehicle body configured to mount the battery pack thereon, wherein a portion of the vehicle body is configured to be inserted into a recessed space formed by the protrusion of the cooling unit.

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