Battery packs and electric vehicles including battery packs

Abstract

The present invention provides a battery pack that increases the energy density of the space in which the battery is located. [Solution] A battery pack 10 is provided, comprising a plate-shaped base frame 100 having a predetermined region (R) on its upper surface, and a plurality of batteries 200 having a cross-sectional footprint (F) shape defined by the outermost cross-sectional profile taken parallel to the upper surface of the base frame. The plurality of batteries may be arranged on the upper surface of the base frame inside the predetermined region (R). The plurality of batteries may include a plurality of types of batteries 200N, 200S having different cross-sectional footprint (F) shapes from each other. At least a portion (RCP) around the predetermined region (R) may extend diagonally.

Description

Technical Field

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0053434, filed on April 29, 2022, and all the contents disclosed in the document of the Korean Patent Application are incorporated herein by reference.

[0002] The present invention relates to a battery pack and an electric vehicle including the battery pack, and more particularly, to a battery pack and an electric vehicle including the battery pack, in which the energy density is increased and the energy efficiency, safety, and energy output can be optimized and improved according to the driving environment or driving conditions.

Background Art

[0003] As electric vehicles enter the mass market, the performance of battery packs built into electric vehicles is becoming important. The performance of a battery pack means, for example, the capacity, energy output, energy efficiency, safety, etc. of the battery pack. Here, the battery pack can accommodate a plurality of batteries (e.g., battery modules) inside.

[0004] To increase the capacity of the battery pack, the energy density of the internal space of the battery pack can be increased or the size of the battery pack itself can be increased. That is, to increase the energy density of the internal space of the battery pack, the size or quantity of the batteries arranged inside the battery pack can be maximized to reduce wasted space.

[0005] To increase the energy output, energy efficiency, or safety of the battery pack, etc., the chemical characteristics of the battery can be adjusted. For example, the chemical characteristics of the battery can be adjusted by changing the active material used in the battery or adjusting the chemical reaction rate and chemical reaction amount of the battery.

[0006] However, battery packs typically contain multiple batteries of the same type, with identical shape and chemical properties. This means that the battery pack cannot be filled entirely with batteries of a single type (shape), resulting in wasted space, or the size of the battery pack itself is reduced to accommodate multiple batteries of the same type, thus decreasing the battery pack's capacity. Furthermore, because the battery pack consists only of batteries of a single type, it is impossible to optimize its energy output, energy efficiency, or safety.

[0007] Korean Published Patent No. 10-2016-0101382 discloses a conventional battery pack in which multiple batteries of the same type having the same shape and chemical properties are arranged. Therefore, the aforementioned problems also occur in the above-mentioned prior art. [Overview of the project] [Problems that the invention aims to solve]

[0008] The present invention was devised to solve the above-mentioned problems, and aims to provide a battery pack in which the energy density of the space in which the battery 200 is located is increased.

[0009] The present invention aims to provide a battery pack with increased electrical capacity.

[0010] The present invention aims to provide a battery pack that increases energy density even when the space in which the battery 200 is arranged has various shapes or sizes.

[0011] The present invention aims to provide a battery pack that has improved structural stability and reduced manufacturing and maintenance costs.

[0012] The present invention aims to provide a battery pack in which energy density can be increased, and whose structure, arrangement, configuration, or performance can be optimized and improved depending on the application or environment.

[0013] The present invention aims to provide a battery pack that is inexpensive and offers improved safety.

[0014] The present invention aims to provide an electric vehicle in which energy efficiency, safety, and energy output can be optimized and improved depending on the driving environment or driving conditions.

[0015] The present invention aims to provide an electric vehicle that reduces manufacturing and maintenance costs.

[0016] The technical problems of the present invention are not limited to the objectives mentioned above. Other objectives and advantages of the present invention not mentioned can be understood from the following description and will become even clearer from the embodiments of the present invention. Furthermore, it is clear that the objectives and advantages of the present invention can be achieved by the means and combinations thereof shown in the claims. [Means for solving the problem]

[0017] To solve the above-mentioned problems, the present invention provides a battery pack 10 including a base frame 100 and a plurality of batteries 200.

[0018] The base frame 100 may be in the shape of a plate with a predetermined area (R) on its upper surface.

[0019] The plurality of batteries 200 may have a cross-sectional footprint (F) shape defined by the outermost profile of the cross section taken parallel to the upper surface of the base frame 100.

[0020] The plurality of batteries 200 can be arranged on the upper surface of the base frame 100 inside the predetermined area (R).

[0021] The plurality of batteries 200 can include a plurality of types of batteries 200N, 200S having the shapes of the cross-sectional footprints (F) different from each other.

[0022] In one embodiment, the predetermined region (R) may extend in a first direction and a second direction perpendicular to the first direction.

[0023] At least a part (RCP) around the predetermined region (R) may extend obliquely in a direction intersecting the first direction and the second direction.

[0024] The cross-sectional footprints (F) of the plurality of batteries 200 may extend in the first direction and the second direction.

[0025] At least a part of the plurality of batteries 200 may be arranged side by side in the first direction or the second direction.

[0026] At least one type of the plurality of types of batteries 200 may be a special type of battery 200S.

[0027] At least a part (FCP) around the cross-sectional footprint (F) of the special type of battery 200S extends obliquely in a direction intersecting the first direction and the second direction along at least a part (RCP) around the predetermined region (R), but the angle difference between the extending direction of each section of at least a part (FCP) around the cross-sectional footprint (F) and the extending direction of each section of at least a part (RCP) around the predetermined region (R) corresponding to each section is smaller than a predetermined angle.

[0028] In one embodiment, the plurality of types of batteries 200 can include at least one of a first type of battery 200A, a second type of battery 200B, a third type of battery 200C, and a fourth type of battery 200D.

[0029] The first type battery 200A, the second type battery 200B, the third type battery 200C, and the fourth type battery 200D may correspond to the special type battery 200S.

[0030] Around the cross-sectional footprint (F) of the first type battery 200A, there may be a first side (a) extending in a first direction, second sides (b) and third sides (c) respectively extending from both ends of the first side (a) of the first type battery 200A in one direction of a second direction by different lengths, and a fourth side (d) corresponding to at least a part (FCP) around the cross-sectional footprint (F) and connecting one ends of the second side (b) and the third side (c) of the first type battery 200A in the second direction.

[0031] Around the cross-sectional footprint (F) of the second type battery 200B, there may be a first side (a) extending in a first direction, second sides (b) and third sides (c) respectively extending from both ends of the first side (a) of the second type battery 200B in the other direction of a second direction by different lengths, and a fourth side (d) corresponding to at least a part (FCP) around the cross-sectional footprint (F) and connecting the other ends of the second side (b) and the third side (c) of the second type battery 200B in the second direction.

[0032] Around the cross-sectional footprint (F) of the third type battery 200C, there may be a first side (a) extending in a first direction, a second side (b) extending in one direction of a second direction from one end or the other end of the first side (a) of the third type battery 200C in the first direction, and a third side (c) corresponding to at least a part (FCP) around the cross-sectional footprint (F) and connecting the other end or one end of the first side (a) of the third type battery 200C in the first direction and one end of the second side (b) of the third type battery 200C in the second direction.

[0033] The cross-sectional footprint (F) of the fourth type battery 200D may include a first side (a) extending in a first direction, a second side (b) extending from one or the other end of the first side (a) of the fourth type battery 200D in the other direction in a second direction, and a third side (c) which corresponds to at least a portion (FCP) around the cross-sectional footprint (F) and connects the other end or one end of the first side (a) of the fourth type battery 200D in the first direction to the other end of the second side (b) of the fourth type battery 200D in the second direction.

[0034] In one embodiment, the plurality of types of batteries 200 may include at least one of the fifth type battery 200E and the sixth type battery 200F.

[0035] The aforementioned Type 5 battery 200E and Type 6 battery 200F may correspond to the special type battery 200S.

[0036] The cross-sectional footprint (F) of the fifth type battery 200E may include a first side (a) and a second side (b) arranged side by side in a first direction and extending in a second direction; a third side (c) corresponding to at least a portion (FCP) around the cross-sectional footprint (F) and connecting one end of the first side (a) and the second side (b) of the fifth type battery 200E in the second direction; and a fourth side (d) corresponding to at least a portion (FCP) around the cross-sectional footprint (F) and connecting the other end of the first side (a) and the second side (b) of the fifth type battery 200E in the second direction.

[0037] The cross-sectional footprint (F) of the sixth type battery 200F may include a first side (a) extending in a second direction, and a second side (b) whose ends are connected to both ends of the first side (a) of the sixth type battery 200F, projecting from the first side (a) of the sixth type battery 200F in one or the other direction in the first direction, and corresponding to at least a portion (FCP) around the cross-sectional footprint (F).

[0038] In one embodiment, the plurality of types of batteries 200 may include a standard type battery 200N.

[0039] The cross-sectional footprint (F) of the conventional battery 200N may include a first side (a) and a second side (b) arranged side by side in a second direction and extending by the same length in the first direction, and a third side (c) and a fourth side (d) arranged side by side in the first direction and extending by the same length in the second direction, connecting one end of the first side (a) and the second side (b) of the conventional battery 200N to the other end, respectively.

[0040] In one embodiment, at least a portion of two or more of the plurality of types of batteries 200 may have different chemical properties from each other, and at least one of the following may differ from each other: energy output, energy efficiency, and safety.

[0041] In one embodiment, the predetermined region (R) may extend in a first direction and in a second direction perpendicular to the first direction.

[0042] At least a portion (RCP) around the predetermined region (R) may extend obliquely in directions intersecting the first and second directions.

[0043] The cross-sectional footprints (F) of the plurality of batteries 200 may extend in the first and second directions.

[0044] At least some of the plurality of batteries 200 may be arranged in a line in the first direction or the second direction.

[0045] The aforementioned multiple types of batteries 200 may include one or more standard batteries 200N and one or more special batteries 200S.

[0046] The cross-sectional footprint (F) of the conventional battery 200N may include a first side (a) and a second side (b) arranged side by side in a second direction and extending by the same length in the first direction, and a third side (c) and a fourth side (d) arranged side by side in the first direction and extending by the same length in the second direction, connecting one end of the first side (a) and the other end of the second side (b), respectively.

[0047] At least a portion (FCP) of the special type battery 200S around the cross-sectional footprint (F) extends diagonally along at least a portion (RCP) around the predetermined region (R) in directions intersecting the first and second directions, but the extension may be such that the angle difference between the extending direction of each section of the at least portion (FCP) around the cross-sectional footprint (F) and the extending direction of each section of the at least portion (RCP) around the predetermined region (R) corresponding to each section is smaller than a predetermined angle.

[0048] At least some of the special type batteries 200S and at least some of the conventional type batteries 200N may have different chemical properties from each other, and at least one of the following may differ from each other: energy output, energy efficiency, and safety.

[0049] In one embodiment, at least some of the special type batteries 200S may have at least one portion (FCP) around the cross-sectional footprint (F) adjacent to at least one portion (RCP) around a predetermined region (R) corresponding to at least one portion (FCP) around the cross-sectional footprint (F).

[0050] The standard battery 200N may be placed on another part of the predetermined region (R) where the special battery 200S is not located.

[0051] At least some of the batteries 200 of the special type battery 200S that are arranged adjacent to at least a portion (RCP) around the predetermined region (R) are safer than at least some of the batteries 200 of the normal type battery 200N that are not arranged adjacent to at least a portion (RCP) around the predetermined region (R).

[0052] Furthermore, in order to solve the above-mentioned problems, the present invention provides an electric vehicle including the battery pack 10 and wheels 20.

[0053] The base frame 100 extends in a first direction and a second direction and can be coupled to the wheel 20.

[0054] At least a portion around one end in the first direction of the predetermined region (R) may correspond to at least a portion around the predetermined region (R) (RCP).

[0055] As a result, in at least some of the special type batteries 200S, at least a portion (FCP) around the cross-sectional footprint (F) may be positioned adjacent to at least a portion around one end in the first direction of the predetermined region (R) that corresponds to at least a portion (FCP) around the cross-sectional footprint (F).

[0056] In one embodiment, the first side of the base frame 100 may be facing the front of the vehicle.

[0057] The other side of the base frame 100 in the first direction may be at the rear of the vehicle.

[0058] As a result, the first side end of the predetermined region (R) may be in front of the vehicle.

[0059] In one embodiment, the first-direction end of the predetermined region (R) may include a predetermined section (S) in the first direction in which the width in the second direction gradually decreases as it moves toward one side of the first direction.

[0060] The area around the predetermined region (R) belonging to the predetermined interval (S) may correspond to at least a portion (RCP) of the area around the predetermined region (R).

[0061] In one embodiment, the electric vehicle may include a first motor 30A and a second motor 30B, which are provided on one side and the other side in the first direction, respectively. The wheel 20 may include one or more first wheels 20A provided on one side in the first direction and coupled with the first motor 30A, and one or more second wheels 20B provided on the other side in the first direction and coupled with the second motor 30B.

[0062] At least some of the batteries 200 of the special type battery 200S, which are arranged adjacent to at least a portion of the first side end of the predetermined region (R), are connected to the first motor 30A and can supply power to the first motor 30A.

[0063] At least some of the batteries 200 of the standard type batteries 200N, which are located on other parts of the predetermined area (R) where the special type battery 200S is not located, are connected to the second motor 30B and can supply power to the second motor 30B.

[0064] The special-type battery 200S connected to the first motor 30A and the standard-type battery 200N connected to the second motor 30B may differ from each other in at least one of the following: energy output, energy efficiency, and safety.

[0065] In one embodiment, the special-type battery 200S connected to the first motor 30A has higher energy efficiency and safety, and lower energy output than the standard-type battery 200N connected to the second motor 30B. [Effects of the Invention]

[0066] According to embodiments of the present invention, the battery pack 10 may include a base frame 100 and a plurality of batteries 200. The base frame 100 may be plate-shaped with a predetermined region (R) on its upper surface. The plurality of batteries 200 may have a cross-sectional footprint (F) shape defined by the outermost cross-sectional profile taken parallel to the upper surface of the base frame 100. The plurality of batteries 200 may be arranged on the upper surface of the base frame 100 inside the predetermined region (R). The plurality of batteries 200 may include a plurality of types of batteries 200N, 200S having different cross-sectional footprint (F) shapes from each other.

[0067] This can increase the output, capacity, and lifespan of the battery pack 10. Furthermore, even if the predetermined region (R) has various shapes or sizes, the energy density of the space inside the predetermined region (R) can increase. Also, even if the predetermined region (R) is expanded to any configuration in which no of the multiple types of batteries 200 are placed, other types of batteries 200 may be placed on the expanded region, so the battery pack 10 or the predetermined region (R) can be expanded to its maximum extent, thereby increasing the electrical capacity of the battery pack 10.

[0068] According to embodiments of the present invention, a predetermined region (R) may extend in a first direction and in a second direction perpendicular to the first direction. At least a portion (RCP) around the predetermined region (R) may extend obliquely in a direction intersecting the first and second directions. The cross-sectional footprints (F) of the plurality of batteries 200 may extend in the first and second directions. At least a portion of the plurality of batteries 200 may be arranged side by side in the first or second direction. At least one of the plurality of types of batteries 200 may be a special type of battery 200S. At least a portion (FCP) around the cross-sectional footprint (F) of the special type battery 200S extends diagonally along at least a portion (RCP) around a predetermined region (R) in directions intersecting the first and second directions, but the extension may be such that the angle difference between the extending direction of each section of the at least portion (FCP) around the cross-sectional footprint (F) and the extending direction of each section of the at least portion (RCP) around the predetermined region (R) corresponding to each section is smaller than a predetermined angle.

[0069] As a result, even if at least some of the batteries 200 are arranged in a line on the inside of the predetermined region (R), special type batteries 200S having a shape corresponding to at least a portion (RCP) around the predetermined region (R) can be arranged on the inside of the predetermined region (R), even if they extend diagonally in a direction intersecting a first or second direction. Therefore, the energy density of the space on the inside of the predetermined region (R) can be increased. Thus, the output, capacity, and lifespan of the battery pack 10 can be increased.

[0070] Furthermore, even if the predetermined region (R) has various shapes, the energy density in the space above the interior of the predetermined region (R) can increase.

[0071] Furthermore, even if the predetermined region (R) is expanded to have a perimeter extending diagonally in a direction intersecting the first and second directions, a special type of battery 200S can be placed on the expanded region. Therefore, the battery pack 10 or the predetermined region (R) can be expanded to its maximum extent, thereby increasing the electrical capacity of the battery pack 10.

[0072] According to embodiments of the present invention, the multiple types of batteries 200 may include at least one of the first type battery 200A, the second type battery 200B, the third type battery 200C, and the fourth type battery 200D. The first type battery 200A, the second type battery 200B, the third type battery 200C, and the fourth type battery 200D may correspond to a special type battery 200S. The cross-sectional footprint (F) of the first type battery 200A may include a first side (a) extending in a first direction, second sides (b) and third sides (c) extending by different lengths from both ends of the first side (a) of the first type battery 200A in one of the second directions, and a fourth side (d) which corresponds to at least a portion (FCP) around the cross-sectional footprint (F) and connects one end of the second side (b) and third side (c) of the first type battery 200A in the second direction. The cross-sectional footprint (F) of the Type 2 battery 200B may include a first side (a) extending in a first direction, a second side (b) and a third side (c) extending by different lengths from both ends of the first side (a) of the Type 2 battery 200B in the other direction of a second direction, and a fourth side (d) which corresponds to at least a portion (FCP) around the cross-sectional footprint (F) and connects the other ends of the second side (b) and the third side (c) of the Type 2 battery 200B in the second direction. The cross-sectional footprint (F) of the Type 3 battery 200C may include a first side (a) extending in a first direction, a second side (b) extending in one direction from one or the other end of the first side (a) of the Type 3 battery 200C in a second direction, and a third side (c) which corresponds to at least a portion (FCP) around the cross-sectional footprint (F) and connects the other or one end of the first side (a) of the Type 3 battery 200C in a first direction with one end of the second side (b) of the Type 3 battery 200C in a second direction.The cross-sectional footprint (F) of the Type 4 battery 200D may include a first side (a) extending in a first direction, a second side (b) extending from one or the other end of the first side (a) in the first direction to the other end in the second direction, and a third side (c) which corresponds to at least a portion (FCP) around the cross-sectional footprint (F) and connects the other end or one end of the first side (a) in the first direction to the other end of the second side (b) in the second direction.

[0073] As a result, even if at least a portion (RCP) around a predetermined region (R) extending diagonally in a direction intersecting the first or second direction is formed on one or the other side of the predetermined region (R) in the second direction, first / second / third / fourth type batteries 200A, 200B, 200C, 200D, including the corresponding shape, can be placed on the inside of the predetermined region (R), thus increasing the energy density of the space inside the predetermined region (R). Therefore, the output, capacity, and lifespan of the battery pack 10 can be increased.

[0074] Furthermore, even if one or the other side of the predetermined region (R) in the second direction has various shapes that extend diagonally in a direction intersecting the first or second direction, the energy density in the upper space inside the predetermined region (R) can increase.

[0075] Furthermore, at least one side around the cross-sectional footprint (F) of the first / second / third / fourth type batteries 200A, 200B, 200C, and 200D may extend in the first or second direction. Thus, it is easy to arrange the first / second / third / fourth type batteries 200A, 200B, 200C, and 200D adjacent to each other in the second or first direction, and even if subjected to an external force in the first or second direction, they can be fixed to the base frame 100 along the second or first direction perpendicular to it, thereby improving structural stability. In addition, the empty space between the batteries 200 can be minimized, and the energy density of the inner upper space of a given region (R) can be increased.

[0076] According to embodiments of the present invention, the multiple types of battery 200 may include at least one of the fifth type battery 200E and the sixth type battery 200F. The fifth type battery 200E and the sixth type battery 200F may correspond to a special type battery 200S. The cross-sectional footprint (F) of the fifth type battery 200E may include a first side (a) and a second side (b) arranged side by side in a first direction and extending in a second direction, a third side (c) corresponding to at least a portion (FCP) around the cross-sectional footprint (F) and connecting one end of the first side (a) and the second side (b) of the fifth type battery 200E in the second direction, and a fourth side (d) corresponding to at least a portion (FCP) around the cross-sectional footprint (F) and connecting the other end of the first side (a) and the second side (b) of the fifth type battery 200E in the second direction. The cross-sectional footprint (F) of the Type 6 battery 200F may include a first side (a) extending in a second direction, and a second side (b) whose ends are connected to both ends of the first side (a) of the Type 6 battery 200F, projecting from the first side (a) of the Type 6 battery 200F in one or the other direction in the first direction, and corresponding to at least a portion (FCP) around the cross-sectional footprint (F).

[0077] As a result, even if the predetermined region (R) includes a section (e.g., S in Figure 1) where the width in the second direction changes towards one or the other end in the first direction, such as a bell shape, the fifth / sixth type batteries 200E, 200F, which include the shape of the predetermined region (R) corresponding to the section (S), can be placed on the inside of the predetermined region (R) corresponding to the section (S). Therefore, the energy density of the space inside the predetermined region (R) can be increased. Consequently, the output, capacity, and lifespan of the battery pack 10 can be increased.

[0078] Furthermore, even if one or the other side of the predetermined region (R) in the first direction has various shapes, the energy density in the upper space inside the predetermined region (R) can increase.

[0079] Furthermore, at least one side of the cross-sectional footprint (F) of the fifth / sixth type battery 200E, 200F may extend in the second direction. Thus, the fifth / sixth type battery 200E, 200F can be easily arranged in the first direction alongside adjacent batteries 200, and even if subjected to an external force in the first direction, it can be fixed to the base frame 100 along the second direction perpendicular to it, thereby improving structural stability. In addition, the empty space between batteries 200 can be minimized, and the energy density of the inner upper space of a given region (R) can be increased.

[0080] According to embodiments of the present invention, the multiple types of battery 200 include a standard battery 200N. The cross-sectional footprint (F) of the standard battery 200N may include a first side (a) and a second side (b) arranged side by side in a second direction and extending by the same length in the first direction, and a third side (c) and a fourth side (d) arranged side by side in the first direction and extending by the same length in the second direction, connecting one end of the first side (a) and the second side (b) of the standard battery 200N to the other end, respectively.

[0081] This allows for the placement of both a standard battery 200N, which has a rectangular cross-sectional footprint, and a special-shaped battery 200S, which has a special-shaped cross-sectional footprint, such as a trapezoid or triangle, on the inside of a predetermined region (R). The standard battery 200N can be placed on the inside of various shaped predetermined regions (R), regardless of the shape of the region around it, and because of its simple structure, it has a lower manufacturing cost than the special-shaped battery 200S. Therefore, by placing both the standard battery 200N and the special-shaped battery 200S on the inside of a predetermined region (R), the manufacturing cost of the battery pack 10 can be reduced.

[0082] Furthermore, the cross-sectional footprint (F) of the standard battery 200N may extend in both the first and second directions. Thus, the standard battery 200N can be easily arranged alongside adjacent first / second / third / fourth / fifth / sixth type batteries 200A, 200B, 200C, 200D, 200E, and 200F in the first or second direction. Even when subjected to external forces in the first or second direction, it can be fixed to the base frame 100 along the second or first direction perpendicular to these forces, thereby improving structural stability. Additionally, the empty space between the standard battery 200N and the first / second / third / fourth / fifth / sixth type batteries 200A, 200B, 200C, 200D, 200E, and 200F can be minimized, potentially increasing the energy density of the upper inner space within a predetermined region (R).

[0083] According to embodiments of the present invention, at least a portion of two or more types of batteries 200 may have different chemical properties from each other, and at least one of the following may differ from each other: energy output, energy efficiency, and safety.

[0084] As a result, the characteristics of the battery 200 can vary along with the shape of the battery 200 that is positioned inside the predetermined region (R). Therefore, the energy density of the battery pack 10 can be increased, and the structure, arrangement, configuration, or performance of the battery pack 10 can be optimized and improved depending on the application or environment. In addition, batteries 200 with different chemical properties can be easily distinguished based on the shape of the battery 200 (for example, the shape of the cross-sectional footprint).

[0085] According to embodiments of the present invention, a predetermined region (R) may extend in a first direction and in a second direction perpendicular to the first direction. At least a portion (RCP) around the predetermined region (R) may extend obliquely in a direction intersecting the first and second directions. The cross-sectional footprints (F) of the plurality of batteries 200 may extend in the first and second directions. At least a portion of the plurality of batteries 200 may be arranged side by side in the first or second direction. The plurality of types of batteries 200 may include one or more conventional batteries 200N and one or more special batteries 200S. The cross-sectional footprint (F) of a standard battery 200N may include a first side (a) and a second side (b) arranged side by side in a second direction and extending by the same length in the first direction, and a third side (c) and a fourth side (d) arranged side by side in the first direction and extending by the same length in the second direction, connecting one end of the first side (a) and the other end of the second side (b), respectively. The at least portion (FCP) around the cross-sectional footprint (F) of a special battery 200S may extend diagonally along at least portion (RCP) around a predetermined region (R) in a direction intersecting the first and second directions, but the angle difference between the extending direction of each section of at least portion (FCP) around the cross-sectional footprint (F) and the extending direction of each section of at least portion (RCP) around the predetermined region (R) corresponding to each section may be smaller than a predetermined angle. At least some special-type batteries 200S and at least some standard-type batteries 200N may have different chemical properties from each other, and at least one of the following may differ from each other: energy output, energy efficiency, and safety.

[0086] As a result, the characteristics of the battery 200 can vary along with the shape of the battery 200 that is positioned inside the predetermined region (R). Therefore, the energy density of the battery pack 10 can be increased, and the structure, arrangement, configuration, or performance of the battery pack 10 can be optimized and improved depending on the application or environment. In addition, batteries 200 with different chemical properties can be easily distinguished based on the shape of the battery 200 (for example, the shape of the cross-sectional footprint).

[0087] According to embodiments of the present invention, at least some special-type batteries 200S may have at least one portion (FCP) around a cross-sectional footprint (F) adjacent to at least one portion (RCP) around a predetermined region (R) corresponding to at least one portion (FCP) around the cross-sectional footprint (F). Standard-type batteries 200N may be located on other parts of the predetermined region (R) where the special-type batteries 200S are not located. At least some of the batteries 200 of the special-type batteries 200S that are located adjacent to at least one portion (RCP) around the predetermined region (R) are safer than at least some of the batteries 200 of the standard-type batteries 200N that are not located adjacent to at least one portion (RCP) around the predetermined region (R).

[0088] As a result, the special-type battery 200S is arranged around and adjacent to a predetermined area (R), while the standard-type battery 200N is arranged on other parts. This increases the number of standard-type batteries 200N, simplifies the structure of the battery pack 10, reduces the manufacturing and maintenance costs of the battery pack 10, and makes manufacturing and maintenance of the battery pack 10 easier.

[0089] Furthermore, because batteries that are positioned around and adjacent to a predetermined area (R) and are therefore subject to significant external impacts (special type batteries) are safer than batteries that are not positioned around and adjacent to a predetermined area (R) and are therefore not subject to significant external impacts (normal type batteries). Thus, the safety of the battery pack 10 can be improved effectively and at a low cost.

[0090] Furthermore, a special type of battery 200S that includes a portion extending diagonally in a direction intersecting the first and second directions along at least a portion (RCP) around a predetermined region (R), which may be structurally unstable and may have a large surface area facing the outside of the battery pack 10, does not include a portion extending diagonally in a direction intersecting the first and second directions, and is therefore structurally stable and safer than a normal type of battery 200N which may have a small surface area facing the outside of the battery pack 10. Thus, the safety of the battery pack 10 can be improved effectively and at a low cost.

[0091] According to embodiments of the present invention, an electric vehicle may include a battery pack 10 and wheels 20. The base frame 100 of the battery pack 10 may extend in a first and second direction and be coupled to the wheels 20. At least a portion of the battery pack 10 around one end in the first direction of a predetermined region (R) may correspond to at least a portion (RCP) around the predetermined region (R). For this reason, at least some special types of batteries 200S may be arranged adjacent to at least a portion around one end in the first direction of a predetermined region (R), such that at least a portion (FCP) around a cross-sectional footprint (F) corresponds to at least a portion (FCP) around the cross-sectional footprint (F).

[0092] As a result, batteries that are placed adjacent to the first end of a predetermined region (R) and are therefore subjected to large external impacts (special type batteries) are safer than batteries that are not placed adjacent to the first end of a predetermined region (R) and are therefore not subjected to large external impacts (normal type batteries). Thus, the safety of the battery pack 10 installed in the electric vehicle 1 can be improved effectively and at a low cost.

[0093] Furthermore, a special type of battery 200S, which may be structurally unstable and have a large surface area facing the outside of the battery pack 10 because it includes a portion that extends diagonally in a direction intersecting the first and second directions along at least a portion (RCP) around one end in the first direction of a predetermined region (R), is structurally stable and safer than a normal type of battery 200N, which does not include a portion that extends diagonally in a direction intersecting the first and second directions and has a small surface area facing the outside of the battery pack 10. Therefore, the safety of the battery pack 10 installed in the electric vehicle 1 can be improved effectively and at a low cost.

[0094] According to embodiments of the present invention, one side of the base frame 100 in the first direction may be in front of the vehicle. The other side of the base frame 100 in the first direction may be in rear of the vehicle. For this reason, the end of one side in the first direction of a predetermined region (R) may be in front of the vehicle.

[0095] As a result, batteries (special type batteries) that are positioned at the front of the vehicle and can withstand a large impact from a vehicle collision are safer than other batteries (for example, conventional batteries) that cannot withstand a large impact from a vehicle collision. Therefore, the safety of the battery pack 10 installed in the electric vehicle 1 can be improved effectively and at a low cost.

[0096] According to embodiments of the present invention, one end of a predetermined region (R) in a first direction may include a predetermined section (S) in a first direction in which the width in the second direction gradually decreases as it moves toward one side of the first direction. The area around the predetermined region (R) belonging to the predetermined section (S) may correspond to at least a portion (RCP) around the predetermined region (R).

[0097] As a result, even if the front of a predetermined region (R) is bell-shaped due to including the predetermined section (S), the highly safe special type battery 200S may be arranged adjacent to the area (R) that belongs to the predetermined section (S). Therefore, for example, even if the front of the electric vehicle 1 is streamlined to reduce air resistance, and as a result the front of the predetermined region (R) is bell-shaped, the safety of the battery pack 10 installed in the electric vehicle 1 can be improved effectively and at a low cost.

[0098] According to embodiments of the present invention, the electric vehicle may include a first motor 30A and a second motor 30B, respectively, provided on one and the other side in a first direction. The wheels 20 may include one or more first wheels 20A provided on one side in a first direction and coupled to the first motor 30A, and one or more second wheels 20B provided on the other side in a first direction and coupled to the second motor 30B. At least some of the batteries 200 of the special type battery 200S, which are arranged adjacent to at least a portion of the first-direction end of a predetermined region (R), can be connected to the first motor 30A and supply power to the first motor 30A. At least some of the batteries 200 of the standard type battery 200N, which are arranged on other parts of the predetermined region (R) where the special type battery 200S is not located, can be connected to the second motor 30B and supply power to the second motor 30B. The special-type battery 200S connected to the first motor 30A and the standard-type battery 200N connected to the second motor 30B may differ from each other in at least one of the following aspects: energy output, energy efficiency, and safety.

[0099] This allows for the easy and inexpensive operation of a motor 30 connected to a battery 200 having characteristics that match the driving environment or conditions, using a simple configuration. Therefore, the energy efficiency, safety, and energy output of the electric vehicle can be optimized and improved depending on the driving environment or conditions.

[0100] Furthermore, since the first / second motors 30A and 30B, and the special / standard batteries 200S and 200N connected to the first / second motors 30A and 30B are located close to each other, wiring is easy, which can reduce the manufacturing and maintenance costs of electric vehicles.

[0101] According to an embodiment of the present invention, the special-type battery 200S connected to the first motor 30A has higher energy efficiency and safety, and lower energy output than the conventional-type battery 200N connected to the second motor 30B.

[0102] This allows the first motor 30A, connected to a special type of battery 200S with characteristics that meet the requirements for high energy efficiency and safety, to be driven in driving environments or conditions where such requirements are demanded. On the other hand, in driving environments or conditions where high output is demanded, the second motor 30B, connected to a standard type of battery 200N with characteristics that meet the requirements, can be driven. Therefore, the energy efficiency, safety, and energy output of the electric vehicle can be optimized and improved depending on the driving environment or conditions.

[0103] The effects described above, as well as the specific effects of the present invention, will be explained and described below in relation to the embodiments for carrying out the invention. [Brief explanation of the drawing]

[0104] [Figure 1] This drawing schematically shows a part of the configuration of an electric vehicle including a battery pack according to one embodiment of the present invention, and is a plan view showing the state in which the battery has been removed from the battery pack. [Figure 2] Figure 1 is a schematic diagram showing the battery pack with the battery installed, and is a plan view showing an electric vehicle including the battery pack according to the first embodiment. [Figure 3] Figure 1 is a schematic diagram showing the state in which a battery is installed in the battery pack, and is a plan view showing an electric vehicle including the battery pack according to the second embodiment. [Figure 4]Figure 1 is a schematic diagram showing the state in which a battery is installed in the battery pack, and is a plan view showing an electric vehicle including the battery pack according to the third embodiment. [Modes for carrying out the invention]

[0105] The aforementioned objectives, features, and advantages will be described in detail below with reference to the accompanying drawings, so that a person with ordinary skill in the art to which the present invention pertains can easily implement the technical concept of the present invention. In describing the present invention, if a specific description of known technology according to the present invention is deemed to obscure the gist of the present invention, the detailed description will be omitted. Hereafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings are used to indicate the same or similar components.

[0106] Although terms such as "first," "second," etc., are used to describe various components, these components are, of course, not limited by these terms. These terms are simply used to distinguish one component from another, and unless otherwise stated, the first component may also be the second component.

[0107] Unless otherwise stated in the entire specification, each component may be singular or plural.

[0108] In the following, the placement of any configuration "above (or below)" a component or "above (or below)" a component means not only that the configuration is placed in contact with the upper (or lower) surface of the component, but also that other configurations may be interposed between the component and any configuration placed on (or below) it.

[0109] Furthermore, where it is stated that one component is “linked,” “joined,” or “connected” to another component, it should be understood that the components may be directly linked or connected to one another, but may also be “interposed” between each component, or each component may be “linked,” “joined,” or “connected” through other components.

[0110] As used herein, singular expressions include plural expressions unless the context clearly indicates otherwise. Terms such as “composed of” or “including” in this application should not be construed as necessarily including all of the multiple components or stages described in the specification, and should be construed as meaning that some of the components or stages may not be included, or that further components or stages may be included.

[0111] Figure 1 is a schematic diagram showing a partial configuration of an electric vehicle including a battery pack according to one embodiment of the present invention, and is a plan view showing the state in which the battery has been removed from the battery pack. Figure 2 is a schematic diagram showing the state in which the battery has been installed in the battery pack of Figure 1, and is a plan view showing an electric vehicle including a battery pack according to the first embodiment. Figure 3 is a schematic diagram showing the state in which the battery has been installed in the battery pack of Figure 1, and is a plan view showing an electric vehicle including a battery pack according to the second embodiment. Figure 4 is a schematic diagram showing the state in which the battery has been installed in the battery pack of Figure 1, and is a plan view showing an electric vehicle including a battery pack according to the third embodiment.

[0112] [Battery Pack] Referring to Figures 1 to 4, one embodiment of the battery pack 10 can include a base frame 100 and a plurality of batteries 200.

[0113] The base frame 100 may be in the shape of a plate.

[0114] The base frame 100 may have a predetermined area (R) on its upper surface.

[0115] The predetermined region (R) may extend in a first direction (e.g., the front-to-back direction) and a second direction perpendicular to the first direction (e.g., the left-to-right direction).

[0116] At least a portion (RCP) around a given region (R) may extend obliquely in directions intersecting the first and second directions.

[0117] Multiple batteries 200 may be arranged on the upper surface of the base frame 100 within a predetermined area (R).

[0118] Here, "battery 200" refers to a battery module, but is not limited to it.

[0119] Multiple batteries 200 can have a cross-sectional footprint (F) shape defined by the outermost profile of the cross section taken parallel to the top surface of the base frame 100.

[0120] Multiple batteries 200 can include multiple types of batteries 200N, 200S having different cross-sectional footprint (F) shapes from each other.

[0121] Multiple types of batteries 200 may have a cross-sectional footprint (F) area smaller than the area of ​​a predetermined region (R).

[0122] When multiple batteries 200, i.e., multiple types of batteries 200 with different cross-sectional footprint (F) shapes, are arranged inside a predetermined region (R), the energy density in the space inside the predetermined region (R) may increase compared to when one or more batteries 200 belonging to any of the multiple types are arranged inside the predetermined region (R). In other words, the maximum sum of the areas of the cross-sectional footprint (F) shapes of multiple batteries 200, composed of multiple types of batteries 200N, 200S, arranged inside the predetermined region (R) may be even greater than the maximum sum of the areas of the cross-sectional footprint shapes of multiple batteries 200, composed of a single type of battery 200N, arranged inside the predetermined region (R).

[0123] For example, as shown in Figure 3, even if a single type of standard battery 200N, with a rectangular cross-sectional footprint (F), is arranged to the maximum extent possible in rows and columns in the first and second directions on the inside of a predetermined area (R), there may still be empty space on the inside of the predetermined area (R) where the standard battery 200N cannot be placed. By placing a special type of battery 200S, which has a different cross-sectional footprint (F) shape from the standard battery 200N and can be installed in the empty space, the energy density of the inside of the predetermined area (R) can be increased.

[0124] This can increase the output, capacity, and lifespan of the battery pack 10. Furthermore, even if the predetermined region (R) has various shapes or sizes, the energy density of the space inside the predetermined region (R) can increase. Also, even if the predetermined region (R) is expanded to any form in which none of the multiple types of batteries 200 can be placed, other types of batteries 200 can be placed on the expanded region, so the battery pack 10 or the predetermined region (R) can be expanded to its maximum extent, thereby increasing the electrical capacity of the battery pack 10.

[0125] The cross-sectional footprints (F) of multiple batteries 200 may extend in the first and second directions.

[0126] At least some of the multiple batteries 200 may be arranged in a line in the first or second direction.

[0127] At least one of the multiple types of batteries 200 may be a special type battery 200S.

[0128] A special type of battery 200S may be a battery 200 in which at least a portion (FCP) around the cross-sectional footprint (F) extends diagonally along at least a portion (RCP) around a predetermined region (R) in a direction intersecting the first and second directions.

[0129] In this case, at least a portion (FCP) around the cross-sectional footprint (F) of the special type battery 200S may be straight or curved.

[0130] Furthermore, at least a portion (FCP) around the cross-sectional footprint (F) of the special-type battery 200S and at least a portion (RCP) around the predetermined region (R) do not have to correspond precisely.

[0131] For example, the angular difference between the extending direction of each section of at least a portion (FCP) around the cross-sectional footprint (F) of the special type battery 200S and the extending direction of each section of at least a portion (RCP) around a predetermined region (R) corresponding to each of the said sections (each section of at least a portion around the cross-sectional footprint of the special type battery) may be smaller than a predetermined angle. Here, the predetermined angle may be, for example, 30 degrees.

[0132] As a result, even if at least some of the batteries 200 extend diagonally in a direction intersecting a first or second direction in which they are arranged side by side on the inside of the predetermined region (R), a special type of battery 200S having a shape corresponding to at least a portion of the area around the predetermined region (R) (RCP) can be arranged on the inside of the predetermined region (R), thus increasing the energy density of the space on the inside of the predetermined region (R). Therefore, the output, capacity, and lifespan of the battery pack 10 can be increased.

[0133] Furthermore, even if the predetermined region (R) has various shapes, the energy density in the space above the interior of the predetermined region (R) can increase.

[0134] Furthermore, even if the predetermined region (R) is expanded to have a perimeter extending diagonally in a direction intersecting the first and second directions, a special type of battery 200S can be placed on the expanded region. Therefore, the battery pack 10 or the predetermined region (R) can be expanded to its maximum extent, thereby increasing the electrical capacity of the battery pack 10.

[0135] Multiple types of batteries 200 may include at least one of the following: Type 1 battery 200A, Type 2 battery 200B, Type 3 battery 200C, and Type 4 battery 200D.

[0136] The Type 1 battery 200A, Type 2 battery 200B, Type 3 battery 200C, and Type 4 battery 200D may correspond to the special type battery 200S mentioned above. A detailed examination is as follows:

[0137] The cross-sectional footprint (F) of the Type 1 battery 200A may include a first side (a) extending in a first direction, a second side (b) and a third side (c) extending by different lengths from both ends of the first side (a) of the Type 1 battery 200A in one direction (e.g., the left side), and a fourth side (d) which corresponds to at least a portion (FCP) around the aforementioned cross-sectional footprint (F) and connects one end (e.g., the left end) of the second side (b) and the third side (c) of the Type 1 battery 200A in the second direction (Figure 2).

[0138] The cross-sectional footprint (F) of the Type 2 battery 200B may include a first side (a) extending in a first direction, a second side (b) and a third side (c) extending by different lengths from both ends of the first side (a) of the Type 2 battery 200B in the other direction (e.g., to the right), and a fourth side (d) which corresponds to at least a portion (FCP) around the aforementioned cross-sectional footprint (F) and connects the other ends (e.g., the right ends) of the second side (b) and third side (c) of the Type 2 battery 200B in the second direction (Figure 2).

[0139] The fourth side (d) of the Type 1 battery 200A and Type 2 battery 200B, which corresponds to at least a portion (FCP) around the cross-sectional footprint (F), may be a straight line as shown in Figure 2, or it may be a curve, as shown in Figure 2.

[0140] The cross-sectional footprint (F) of the Type 3 battery 200C may include a first side (a) extending in a first direction, a second side (b) extending from one end (e.g., front end) or the other end (e.g., rear end) of the first side (a) of the Type 3 battery 200C in one direction (e.g., left side), and a third side (c) corresponding to at least a portion (FCP) around the aforementioned cross-sectional footprint (F), connecting the other end or one end of the first side (a) of the Type 3 battery 200C in the first direction with one end of the second side (b) of the Type 3 battery 200C in the second direction (Figure 3).

[0141] The cross-sectional footprint (F) of the Type 4 battery 200D may include a first side (a) extending in a first direction, a second side (b) extending from one or the other end of the first side (a) of the Type 4 battery 200D in the other direction in a second direction, and a third side (c) which corresponds to at least a portion (FCP) around the aforementioned cross-sectional footprint (F) and connects the other end or one end of the first side (a) of the Type 4 battery 200D in the first direction to the other end of the second side (b) of the Type 4 battery 200D in the second direction (Figure 3).

[0142] The third side (c) of the Type 3 battery 200C and Type 4 battery 200D, which corresponds to at least a portion (FCP) around the cross-sectional footprint (F), may be a straight line, as shown in Figure 3, or a curve, as shown in Figure 4.

[0143] As a result, even if at least a portion (RCP) around a predetermined region (R) extending diagonally in a direction intersecting the first or second direction is formed on one or the other side of the predetermined region (R) in the second direction, the first / second / third / fourth type batteries 200A, 200B, 200C, and 200D, including the corresponding shape, can be arranged on the inside of the predetermined region (R), thus increasing the energy density of the space inside the predetermined region (R). Therefore, the output, capacity, and lifespan of the battery pack 10 can be increased.

[0144] Furthermore, even if one or the other side of the predetermined region (R) in the second direction has various shapes that extend diagonally in a direction intersecting the first or second direction, the energy density in the upper space inside the predetermined region (R) can increase.

[0145] Furthermore, at least one side of the cross-sectional footprint (F) of the first / second / third / fourth type batteries 200A, 200B, 200C, and 200D may extend in the first or second direction. Thus, it is easy to arrange the first / second / third / fourth type batteries 200A, 200B, 200C, and 200D side by side with adjacent batteries 200 in the second or first direction, and even if subjected to external forces in the first or second direction, they are fixed to the base frame 100 along the second or first direction perpendicular to these forces, thus potentially improving structural stability. In addition, the space between batteries 200 can be minimized, and the energy density of the inner upper space of a given region (R) may increase.

[0146] Multiple types of batteries 200 may include at least one of the fifth type battery 200E and the sixth type battery 200F.

[0147] The Type 5 battery 200E and Type 6 battery 200F may correspond to the special type battery 200S mentioned above. A detailed examination is as follows:

[0148] The cross-sectional footprint (F) of the Type 5 battery 200E may include a first side (a) and a second side (b) arranged side by side in a first direction and extending in a second direction, a third side (c) corresponding to at least a portion (FCP) around the aforementioned cross-sectional footprint (F) and connecting one end of the first side (a) and second side (b) of the Type 5 battery 200E in the second direction, and a fourth side (d) corresponding to at least a portion (FCP) around the aforementioned cross-sectional footprint (F) and connecting the other end of the first side (a) and second side (b) of the Type 5 battery 200E in the second direction (Figure 2).

[0149] The third (c) and fourth (d) sides of the Type 5 battery 200E, which correspond to at least a portion (FCP) around the cross-sectional footprint (F), may be straight lines as shown in Figure 2, or they may be curved lines as shown in Figure 2.

[0150] The cross-sectional footprint (F) of the Type 6 battery 200F may include a first side (a) extending in a second direction, and a second side (b) whose ends are connected to both ends of the first side (a) of the Type 6 battery 200F, projecting from the first side (a) of the Type 6 battery 200F in one or the other direction in the first direction, and corresponding to at least a portion (FCP) around the aforementioned cross-sectional footprint (F) (Figure 4).

[0151] The second side (b) of the Type 6 battery 200F, which corresponds to at least a portion (FCP) around the cross-sectional footprint (F), may be a curve, as shown in Figure 4, or, unlike in Figure 4, it may be a bent straight line or a combination of a straight line and a curve.

[0152] As a result, even if the predetermined region (R) includes a section (e.g., S in Figure 1) where the width in the second direction changes towards one or the other end in the first direction, such as a bell shape, the fifth / sixth type batteries 200E, 200F, which include the shape of the predetermined region (R) corresponding to the section (S), can be placed on the inside of the predetermined region (R) corresponding to the section (S), and the energy density of the space inside the predetermined region (R) can be increased. Therefore, the output, capacity, and lifespan of the battery pack 10 can be increased.

[0153] Furthermore, even if one or the other side of the predetermined region (R) in the first direction has various shapes, the energy density of the space above the interior of the predetermined region (R) can increase.

[0154] Furthermore, at least one side of the cross-sectional footprint (F) of the fifth / sixth type battery 200E, 200F may extend in the second direction. Thus, the fifth / sixth type battery 200E, 200F can be easily arranged in the first direction alongside adjacent batteries 200, and even if subjected to external forces in the first direction, they are fixed to the base frame 100 along the second direction perpendicular to it, thus potentially improving structural stability. In addition, the empty space between batteries 200 can be minimized, and the energy density of the inner upper space of a given region (R) may increase.

[0155] On the other hand, the first and second directions used to realize the aforementioned first / second / third / fourth / fifth / sixth type batteries 200A, 200B, 200C, 200D, 200E, and 200F can correspond to the front-rear and left-right directions of the electric vehicle 1, respectively, as shown in the diagram. However, the configuration is not limited to these. For example, the first and second directions can also correspond to the left-right and front-rear directions of the electric vehicle 1, respectively, contrary to the diagram.

[0156] The various types of battery 200 include the special type battery 200S mentioned above, as well as the standard type battery 200N.

[0157] The cross-sectional footprint (F) of a standard battery 200N may include a first side (a) and a second side (b) arranged side by side in a second direction and extending by the same length in the first direction, and a third side (c) and a fourth side (d) arranged side by side in the first direction and extending by the same length in the second direction, connecting one end of the first side (a) and the second side (b) of the standard battery 200N to the other end, respectively.

[0158] This allows for the placement of both a standard battery 200N, which has a rectangular cross-sectional footprint, and a special-shaped battery 200S, which has a special-shaped cross-sectional footprint, such as a trapezoid or triangle, on the inside of a predetermined region (R). The standard battery 200N can be placed on the inside of various shaped predetermined regions (R), regardless of the shape of the region around it, and because of its simple structure, it has a lower manufacturing cost than the special-shaped battery 200S. Therefore, by placing both the standard battery 200N and the special-shaped battery 200S on the inside of a predetermined region (R), the manufacturing cost of the battery pack 10 can be reduced.

[0159] Furthermore, the cross-sectional footprint (F) of the standard battery 200N may extend in the first and second directions. Therefore, the standard battery 200N can be easily arranged alongside adjacent first / second / third / fourth / fifth / sixth type batteries 200A, 200B, 200C, 200D, 200E, and 200F in the first or second direction, and even if subjected to an external force in the first or second direction, it is fixed to the base frame 100 along the second or first direction perpendicular to it, thus potentially improving structural stability. In addition, the empty space between the standard battery 200N and the first / second / third / fourth / fifth / sixth type batteries 200A, 200B, 200C, 200D, 200E, and 200F can be minimized, and the energy density of the inner upper space of a predetermined region (R) may increase.

[0160] At least a portion of two or more types of batteries 200 may have different chemical properties from each other, with at least one of the following being different: energy output, energy efficiency, and safety. Here, chemical properties mean, for example, the type of active material, the rate and amount of chemical reactions, etc., but are not limited to these.

[0161] Specifically, for example, at least some special-type batteries 200S and at least some standard-type batteries 200N may have different chemical properties, and at least one of the following may differ from each other: energy output, energy efficiency, and safety. Also, even if they correspond to the special-type batteries 200S, the aforementioned first / second / third / fourth / fifth / sixth type batteries 200A, 200B, 200C, 200D, 200E, and 200F, which are of different types, may have different chemical properties, and at least one of the following may differ from each other: energy output, energy efficiency, and safety.

[0162] This allows for diversification of the characteristics of the battery 200, along with its shape, as it is positioned inside the predetermined region (R). As a result, the energy density of the battery pack 10 increases, and the structure, arrangement, configuration, or performance of the battery pack 10 can be optimized and improved depending on the application or environment. Furthermore, batteries 200 with different chemical properties can be easily distinguished based on their shape (for example, the shape of their cross-sectional footprint).

[0163] In at least some special types of battery 200S, at least a portion (FCP) around the aforementioned cross-sectional footprint (F) may be arranged adjacent to at least a portion (RCP) around a predetermined region (R) corresponding to the aforementioned portion (FCP) around the cross-sectional footprint (F). However, the configuration is not limited to these.

[0164] The standard battery 200N may be placed on another part of the designated area (R) where the special battery 200S is not located.

[0165] At least some of the batteries 200 of the special type battery 200S, which are arranged adjacent to at least a portion (RCP) around the predetermined area (R) described above, are safer than at least some of the batteries 200 of the normal type battery 200N, which are not arranged adjacent to at least a portion (RCP) around the predetermined area (R).

[0166] As a result, the special-type battery 200S is arranged around and adjacent to a predetermined area (R), while the standard-type battery 200N is arranged on other parts. This increases the number of standard-type batteries 200N, simplifies the structure of the battery pack 10, reduces the manufacturing and maintenance costs of the battery pack 10, and makes manufacturing and maintenance of the battery pack 10 easier.

[0167] Furthermore, because batteries that are placed adjacent to and around the designated area (R) and are therefore susceptible to large external shocks (special type batteries) are safer than batteries that are not placed adjacent to and around the designated area (R) and are therefore not susceptible to large external shocks (normal type batteries). Thus, the safety of the battery pack 10 can be improved effectively and at a low cost.

[0168] Furthermore, the special type battery 200S, which may be structurally unstable and have a large surface area facing the outside of the battery pack 10 because it includes a portion that extends diagonally in a direction intersecting the first and second directions along at least a portion (RCP) around a predetermined region (R), is structurally stable and has a smaller surface area facing the outside of the battery pack 10. Therefore, the safety of the battery pack 10 can be effectively improved at a low cost.

[0169] [Electric vehicles] An electric vehicle 1 according to one embodiment may include a battery pack 10 and wheels 20. The electric vehicle 1 may also include a motor 30.

[0170] The battery pack 10 is as described above. Below, we will consider the case in which the aforementioned battery pack 10 is used in the electric vehicle 1.

[0171] The base frame 100 of the battery pack 10 may extend in a first direction and a second direction.

[0172] At least a portion (RCP) around one end in the first direction of a predetermined region (R) of the battery pack 10 may correspond to at least a portion (RCP) around the predetermined region (R) as described above.

[0173] Therefore, in some special types of batteries 200S, at least one portion (FCP) around the cross-sectional footprint (F) may be arranged adjacent to at least one portion (RCP) around the first side end of the predetermined region (R) corresponding to at least one portion (FCP) around the cross-sectional footprint (F).

[0174] In this case, at least some of the batteries 200 of the special type battery 200S, which are arranged adjacent to at least a portion (RCP) around one end of the first direction of a predetermined region (R), are safer than at least some of the batteries 200 of the normal type battery 200N, which are not arranged adjacent to at least a portion (RCP) around one end of the first direction of a predetermined region (R).

[0175] As a result, batteries that are placed adjacent to the first end of a predetermined region (R) and are therefore subject to large external impacts (special type batteries) are safer than batteries that are not placed adjacent to the first end of a predetermined region (R) and are therefore not subject to large external impacts (normal type batteries). Thus, the safety of the battery pack 10 installed in the electric vehicle 1 can be improved effectively and at a low cost.

[0176] Furthermore, a special type of battery 200S, which may be structurally unstable and have a large surface area facing the outside of the battery pack 10 because it includes a portion that extends diagonally in a direction intersecting the first and second directions along at least a portion (RCP) around one end in the first direction of a predetermined region (R), is structurally stable and safer than a normal type of battery 200N, which does not include a portion that extends diagonally in a direction intersecting the first and second directions and has a small surface area facing the outside of the battery pack 10. Therefore, the safety of the battery pack 10 installed in the electric vehicle 1 can be improved effectively and at a low cost.

[0177] In this case, one side of the base frame 100 in the first direction may be at the front of the vehicle, and the other side of the base frame 100 in the first direction may be at the rear of the vehicle. For this reason, the end of one side of the predetermined region (R) in the first direction may be at the front of the vehicle.

[0178] As a result, batteries positioned at the front of the vehicle that can withstand a large impact from a vehicle collision (special type batteries) are safer than other batteries that cannot withstand a large impact from a vehicle collision (for example, conventional type batteries). Therefore, the safety of the battery pack 10 installed in the electric vehicle 1 can be improved effectively and at a low cost.

[0179] One end of a predetermined region (R) in the first direction may include a predetermined section (S) in the first direction in which the width in the second direction gradually decreases as it moves toward one side of the first direction.

[0180] The area around the predetermined region (R) belonging to the predetermined interval (S) may correspond to at least a portion (RCP) of the area around the predetermined region (R).

[0181] As a result, even if the front of a predetermined region (R) is bell-shaped due to including the predetermined section (S), the highly safe special type battery 200S may be arranged adjacent to the area (R) belonging to the predetermined section (S). Therefore, for example, even if the front of the electric vehicle 1 is streamlined to reduce air resistance, and as a result the front of the predetermined region (R) is bell-shaped, the safety of the battery pack 10 installed in the electric vehicle 1 can be improved effectively and at a low cost.

[0182] The wheels 20 can be coupled to the base frame 100 of the battery pack 10.

[0183] The wheel 20 may include one or more first wheels 20A provided on one side of the electric vehicle 1 in the first direction, and one or more second wheels 20B provided on the other side of the electric vehicle 1 in the first direction.

[0184] The first motor 30A and the second motor 30B can be provided on one side and the other side of the electric vehicle 1 in the first direction, respectively.

[0185] The first motor 30A can be coupled with one or more first wheels 20A.

[0186] The second motor 30B can be coupled with one or more second wheels 20B.

[0187] At least some of the batteries 200 of the special type battery 200S, which are arranged adjacent to at least a portion of the first side end of a predetermined region (R), are connected to the first motor 30A and can supply power to the first motor 30A.

[0188] At least some of the standard batteries 200N, which are placed on other parts of the predetermined area (R) where the special-type battery 200S cannot be placed, are connected to the second motor 30B and can supply power to the second motor 30B.

[0189] The special-type battery 200S connected to the first motor 30A and the standard-type battery 200N connected to the second motor 30B may differ from each other in at least one of the following: energy output, energy efficiency, and safety.

[0190] This allows for the easy and inexpensive operation of a motor 30 connected to a battery 200 having characteristics that match the driving environment or conditions, using a simple configuration. Therefore, the energy efficiency, safety, and energy output of the electric vehicle can be optimized and improved depending on the driving environment or conditions.

[0191] Furthermore, since the first / second motors 30A and 30B and the special / standard type batteries 200S and 200N connected to the first / second motors 30A and 30B are located close to each other, wiring is easy, which can reduce manufacturing and maintenance costs.

[0192] The special-type battery 200S, which is connected to the first motor 30A, has higher energy efficiency and safety, and lower energy output, than the standard-type battery 200N, which is connected to the second motor 30B.

[0193] This allows the first motor 30A, connected to a special type of battery 200S with characteristics that meet the requirements for high energy efficiency and safety, to be driven in driving environments or conditions where such requirements are demanded. On the other hand, in driving environments or conditions where high output is demanded, the second motor 30B, connected to a standard type of battery 200N with characteristics that meet the requirements, can be driven. Therefore, the energy efficiency, safety, and energy output of the electric vehicle can be optimized and improved depending on the driving environment or conditions.

[0194] On the other hand, although the drawings only show the case where the battery pack 10 is used in the electric vehicle 1, it is not limited to this configuration. In other words, the aforementioned battery pack 10 can be used in various devices other than the electric vehicle 1.

[0195] The embodiments described above should be understood to be illustrative and not limiting in all respects, and the scope of the present invention is indicated more by the claims described below than by the detailed description above. The meaning and scope of the claims described below, as well as any modifications and deformable forms conceived from their equivalent concepts, should be interpreted as being included within the scope of the present invention.

[0196] As described above, the present invention has been explained with reference to the illustrative drawings. However, the present invention is not limited by the embodiments and drawings disclosed herein, and it is obvious to a person of ordinary skill within the scope of the technical concept of the present invention that various modifications can be made. Furthermore, even if the effects of the configuration of the present invention are not explicitly described and explained while embodiments of the present invention are described above, it is natural to acknowledge that predictable effects can be obtained from such configurations. [Explanation of Symbols]

[0197] 1 Electric vehicle 10 Battery Packs 20 wheels 20A First Wheel 20B 2nd wheel 30 motors 30A First Motor 30B Second Motor 100 Base Frame R predetermined region 200 batteries F Cross-sectional footprint 200A Type 1 Battery 200B Type 2 Battery 200C Type 3 Battery 200D Type 4 Battery 200E Type 5 Battery 200F Type 6 Battery 200N Standard Battery 200S Special Type Battery

Claims

1. A plate-shaped base frame (100) having a predetermined area (R) on its upper surface, The system includes a plurality of batteries (200) having the shape of a cross-sectional footprint (F, cross-sectional footprint) defined by the outermost cross-sectional profile taken parallel to the upper surface of the base frame (100), The plurality of batteries (200) are arranged on the upper surface of the base frame (100) inside the predetermined region (R), The plurality of batteries (200) include a plurality of types of batteries (200N, 200S) having different cross-sectional footprint (F) shapes from each other. The predetermined region (R) extends in a first direction and in a second direction perpendicular to the first direction. At least a portion (RCP) around the predetermined region (R) extends obliquely in a direction intersecting the first and second directions, The cross-sectional footprint (F) of the plurality of batteries (200) extends in the first direction and the second direction, At least some of the plurality of batteries (200) are arranged in the first direction or the second direction, Of the aforementioned multiple types of batteries (200), at least one type of battery (200) is a special type of battery (200S), At least a portion (FCP) of the special type battery (200S) around the cross-sectional footprint (F) extends diagonally along at least a portion (RCP) around the predetermined region (R) in a direction intersecting the first and second directions, such that the angle difference between the extending direction of each section of the at least portion (FCP) around the cross-sectional footprint (F) and the extending direction of each section of the at least portion (RCP) around the predetermined region (R) corresponding to each section is smaller than a predetermined angle. Battery pack.

2. The aforementioned plurality of types of batteries (200) include at least one of the first type battery (200A), second type battery (200B), third type battery (200C), and fourth type battery (200D), The aforementioned Type 1 battery (200A), Type 2 battery (200B), Type 3 battery (200C), and Type 4 battery (200D) correspond to the special type battery (200S), The cross-sectional footprint (F) of the first type battery (200A) includes a first side (a) extending in the first direction, a second side (b) and a third side (c) extending by different lengths from both ends of the first side (a) of the first type battery (200A) in one of the second directions, and a fourth side (d) which corresponds to at least a portion (FCP) around the cross-sectional footprint (F) and connects one end of the second side (b) and the third side (c) of the first type battery (200A) in the second direction. The area around the cross-sectional footprint (F) of the Type 2 battery (200B) includes a first side (a) extending in the first direction, a second side (b) and a third side (c) extending by different lengths from both ends of the first side (a) of the Type 2 battery (200B) in the other direction of the second direction, and a fourth side (d) which corresponds to at least a portion (FCP) around the cross-sectional footprint (F) and connects the other ends of the second side (b) and the third side (c) of the Type 2 battery (200B) in the second direction. The cross-sectional footprint (F) of the third type battery (200C) includes a first side (a) extending in a first direction, a second side (b) extending from one or the other end of the first side (a) of the third type battery (200C) in one of the second directions, and a third side (c) corresponding to at least a portion (FCP) around the cross-sectional footprint (F), connecting the other or one end of the first side (a) of the third type battery (200C) in the first direction with one end of the second side (b) of the third type battery (200C) in the second direction. The cross-sectional footprint (F) of the fourth type battery (200D) includes a first side (a) extending in a first direction, a second side (b) extending from one or the other end of the first side (a) of the fourth type battery (200D) in the other direction in a second direction, and a third side (c) corresponding to at least a portion (FCP) around the cross-sectional footprint (F) and connecting the other end or one end of the first side (a) of the fourth type battery (200D) in the first direction to the other end of the second side (b) of the fourth type battery (200D) in the second direction. The battery pack according to claim 1.

3. The aforementioned plurality of types of batteries (200) include at least one of the fifth type battery (200E) and the sixth type battery (200F), The aforementioned Type 5 battery (200E) and Type 6 battery (200F) correspond to the aforementioned special type battery (200S), The cross-sectional footprint (F) of the fifth type battery (200E) includes a first side (a) and a second side (b) arranged side by side in the first direction and extending in the second direction, a third side (c) corresponding to at least a portion (FCP) around the cross-sectional footprint (F) and connecting one end of the first side (a) and the second side (b) of the fifth type battery (200E) in the second direction, and a fourth side (d) corresponding to at least a portion (FCP) around the cross-sectional footprint (F) and connecting the other end of the first side (a) and the second side (b) of the fifth type battery (200E) in the second direction, The cross-sectional footprint (F) of the sixth type battery (200F) includes a first side (a) extending in the second direction, and a second side (b) whose ends are connected to both ends of the first side (a) of the sixth type battery (200F), and which protrudes from the first side (a) of the sixth type battery (200F) in one or the other direction in the first direction, and which corresponds to at least a portion (FCP) around the cross-sectional footprint (F), The battery pack according to claim 1.

4. The aforementioned multiple types of batteries (200) include a standard type battery (200N), The cross-sectional footprint (F) of the conventional battery (200N) includes a first side (a) and a second side (b) arranged side by side in the second direction and extending by the same length in the first direction, and a third side (c) and a fourth side (d) arranged side by side in the first direction and extending by the same length in the second direction, connecting one end and the other end of the first side (a) and the second side (b) of the conventional battery (200N), respectively. The battery pack according to claim 2 or claim 3.

5. At least a portion of two or more of the aforementioned multiple types of batteries (200) have different chemical properties from each other, and at least one of the following differs from each other: energy output, energy efficiency, and safety. The battery pack according to claim 1.

6. The predetermined region (R) extends in a first direction and a second direction perpendicular to the first direction. At least a portion (RCP) around the predetermined region (R) extends obliquely in a direction intersecting the first and second directions, The cross-sectional footprint (F) of the plurality of batteries (200) extends in the first direction and the second direction, At least some of the plurality of batteries (200) are arranged in the first direction or the second direction, The aforementioned multiple types of batteries (200) include one or more standard batteries (200N) and one or more special batteries (200S). The cross-sectional footprint (F) of the conventional battery (200N) includes a first side (a) and a second side (b) arranged side by side in the second direction and extending by the same length in the first direction, and a third side (c) and a fourth side (d) arranged side by side in the first direction and extending by the same length in the second direction, connecting one end of the first side (a) and the other end of the second side (b), respectively. The special type battery (200S) extends obliquely along the at least portion (FCP) around the cross-sectional footprint (F) in a direction intersecting the first and second directions, along the at least portion (RCP) around the predetermined region (R), such that the angle difference between the extending direction of each section of the at least portion (FCP) around the cross-sectional footprint (F) and the extending direction of each section of the at least portion (RCP) around the predetermined region (R) corresponding to each section is smaller than a predetermined angle. At least some of the special type batteries (200S) and at least some of the conventional type batteries (200N) have different chemical properties, and at least one of the following differs from each other: energy output, energy efficiency, and safety. The battery pack according to claim 5.

7. In at least some of the special type batteries (200S), at least a portion (FCP) around the cross-sectional footprint (F) is arranged adjacent to at least a portion (RCP) around the predetermined region (R) corresponding to at least a portion (FCP) around the cross-sectional footprint (F), The conventional battery (200N) is placed on another part of the predetermined region (R) where the special battery (200S) is not located. At least some of the batteries (200) of the special type battery (200S) that are arranged adjacent to at least a portion (RCP) around the predetermined region (R) are safer than at least some of the batteries (200) of the normal type battery (200N) that are not arranged adjacent to at least a portion (RCP) around the predetermined region (R). The battery pack according to claim 6.

8. In an electric vehicle including the battery pack (10) of claim 7, Including the wheels (20), The base frame (100) extends in a first direction and a second direction and is connected to the wheel (20), At least a portion of the predetermined region (R) around one end in the first direction corresponds to at least a portion (RCP) around the predetermined region (R), As a result, at least some of the special type batteries (200S) are arranged such that at least a portion (FCP) around the cross-sectional footprint (F) is adjacent to at least a portion around one end in the first direction of the predetermined region (R) corresponding to at least a portion (FCP) around the cross-sectional footprint (F). Electric vehicle.

9. The first side of the base frame (100) in the first direction is the front of the vehicle, The other side of the base frame (100) in the first direction is at the rear of the vehicle, As a result, the first side end of the predetermined region (R) is in front of the vehicle. The electric vehicle according to claim 8.

10. The first side end of the predetermined region (R) includes a predetermined section (S) in the first direction in which the width in the second direction gradually decreases as it moves toward one side of the first direction. The area around the predetermined region (R) belonging to the predetermined section (S) corresponds to at least a portion (RCP) around the predetermined region (R), The electric vehicle according to claim 9.

11. It includes a first motor (30A) and a second motor (30B) provided on one side and the other side of the first direction, respectively. The wheel (20) includes one or more first wheels (20A) provided on one side of the first direction and coupled to the first motor (30A), and one or more second wheels (20B) provided on the other side of the first direction and coupled to the second motor (30B), At least a portion of the special type battery (200S), which is arranged adjacent to at least a portion of the first side end of the predetermined region (R), is connected to the first motor (30A) and supplies power to the first motor (30A). At least some of the batteries (200) of the standard type battery (200N), which are located in other parts of the predetermined area (R) where the special type battery (200S) is not located, are connected to the second motor (30B) and supply power to the second motor (30B). The special type battery (200S) connected to the first motor (30A) and the standard type battery (200N) connected to the second motor (30B) differ from each other in at least one of the following: energy output, energy efficiency, and safety. The electric vehicle according to claim 9.

12. The special type battery (200S) connected to the first motor (30A) has higher energy efficiency and safety, and lower energy output than the standard type battery (200N) connected to the second motor (30B). The electric vehicle according to claim 11.

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