Battery pack and electric vehicle including the battery pack

Abstract

The present invention provides a battery pack 10 including 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 an outermost profile of a cross section taken parallel to the upper surface of the base frame 100. The plurality of batteries 200 may be disposed 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. At least a portion (RCP) around the predetermined region (R) may extend obliquely. At least a portion (FCP) around the cross-sectional footprint (F) of a special type battery 200S, which is at least one type of the plurality of types of batteries 200, may extend obliquely along at least a portion (RCP) around the predetermined region (R).

Description

[Technical field]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0053434 dated April 29, 2022, and all contents disclosed in the documents of said 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 energy density is increased and energy efficiency, safety, and energy output can be optimized and improved depending on the driving environment or driving conditions. [Background technology]

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

[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 amount of batteries arranged inside the battery pack can be maximized to reduce wasted space.

[0005] The chemical characteristics of a battery may be adjusted to improve the energy output, energy efficiency, or safety of a battery pack. For example, the chemical characteristics of a battery may be adjusted by changing the active material used in the battery or by adjusting the chemical reaction rate or amount of the battery.

[0006] However, a battery pack generally contains a plurality of batteries of the same type, each having the same shape and chemical properties. This results in wasted space because the battery pack cannot be filled with batteries of the same type (shape), or the size of the battery pack itself is reduced to accommodate the size of multiple batteries of the same type, resulting in a reduced capacity of the battery pack. In addition, because the battery pack is composed of only batteries of the same type, it is not possible to optimize the energy output, energy efficiency, safety, etc. of the battery pack.

[0007] Korean Patent Publication No. 10-2016-0101382 discloses a conventional battery pack in which a plurality of batteries of the same type having the same shape and chemical properties are arranged, and therefore the above-mentioned problems also occur in the above-mentioned prior art. Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been devised to solve the above-mentioned problems, and has an object to provide a battery pack in which the energy density of the space in which the battery 200 is arranged is increased.

[0009] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a battery pack with increased electrical capacity.

[0010] An object of the present invention is to provide a battery pack in which the energy density is increased even if the space in which the battery 200 is placed has various shapes or sizes.

[0011] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a battery pack with improved structural stability and reduced manufacturing and maintenance costs.

[0012] An object of the present invention is to provide a battery pack that has an increased energy density and whose structure, arrangement, configuration, performance, etc. can be optimized and improved depending on the application or environment.

[0013] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a battery pack that is inexpensive and has improved safety.

[0014] An object of the present invention is to provide an electric vehicle in which energy efficiency, safety, energy output, etc. 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 object of the present invention is not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned above can be understood from the following description and can be more clearly understood from the embodiments of the present invention. In addition, it is easy to understand that the objects and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims. [Means for solving the problem]

[0017] In order 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 form of a plate having a predetermined region (R) on its upper surface.

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

[0020] The plurality of batteries 200 may be disposed on the upper surface of the base frame 100 inside the predetermined region (R).

[0021] The plurality of batteries 200 may include a plurality of types of batteries 200N, 200S having different cross-sectional footprint (F) shapes.

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

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

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

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

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

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

[0028] In one embodiment, the multiple types of batteries 200 may include at least one of a first type battery 200A, a second type battery 200B, a third type battery 200C, and a fourth type 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] The periphery of the cross-sectional footprint (F) of the first type battery 200A may include a first side (a) extending in a first direction, a second side (b) and a third side (c) each extending from both ends of the first side (a) of the first type battery 200A in one direction in a second direction by different lengths, and a fourth side (d) which corresponds to at least a portion (FCP) of the periphery of the cross-sectional footprint (F) and connects one ends of the second side (b) and third side (c) of the first type battery 200A in the second direction.

[0031] The periphery of the cross-sectional footprint (F) of the second type battery 200B may include a first side (a) extending in a first direction, a second side (b) and a third side (c) each extending from both ends of the first side (a) of the second type battery 200B in the other direction in a different length from each other, and a fourth side (d) which corresponds to at least a portion (FCP) of the periphery of the cross-sectional footprint (F) and connects the other ends in the second direction of the second side (b) and third side (c) of the second type battery 200B.

[0032] The periphery of the cross-sectional footprint (F) of the third type battery 200C can include a first side (a) extending in a first direction, a second side (b) extending from one end or the other end of the first side (a) of the third type battery 200C in the first direction to one end of the second direction, and a third side (c) which corresponds to at least a portion (FCP) of the periphery of the cross-sectional footprint (F) and connects the other end or one end of the first side (a) of the third type battery 200C in the first direction to one end of the second side (b) of the third type battery 200C in the second direction.

[0033] The periphery of 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 end or the other end of the first side (a) of the fourth type battery 200D in the first direction to the other end of the second direction, and a third side (c) which corresponds to at least a portion (FCP) of the periphery of 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 and the other end of the second side (b) of the fourth type battery 200D in the second direction.

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

[0035] The fifth type battery 200E and the sixth type battery 200F may correspond to the special type battery 200S.

[0036] The periphery of 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) that corresponds to at least a portion (FCP) of the periphery of the cross-sectional footprint (F) and connects one ends in the second direction of the first side (a) and the second side (b) of the fifth type battery 200E, and a fourth side (d) that corresponds to at least a portion (FCP) of the periphery of the cross-sectional footprint (F) and connects the other ends in the second direction of the first side (a) and the second side (b) of the fifth type battery 200E.

[0037] The periphery of 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 both ends are connected to both ends of the first side (a) of the sixth type battery 200F, protruding from the first side (a) of the sixth type battery 200F in one or the other of the first direction, and corresponding to at least a portion (FCP) of the periphery of the cross-sectional footprint (F).

[0038] In one embodiment, the multiple types of batteries 200 may include a conventional battery 200N.

[0039] The periphery of 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 the second direction and extending 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 the same length in the second direction, respectively connecting one end and the other end of the first side (a) and the second side (b) of the standard battery 200N.

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

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

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

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

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

[0045] The plurality of types of batteries 200 may include one or more normal type batteries 200N and one or more special type batteries 200S.

[0046] The periphery of 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 the second direction and extending 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 the same length in the second direction, connecting one end and the other end of the first side (a) and the second side (b), respectively.

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

[0048] At least a portion of the special type batteries 200S and at least a portion of the normal type batteries 200N may have different chemical properties and may differ from each other in at least one of energy output, energy efficiency, and safety.

[0049] In one embodiment, at least some of the special type batteries 200S may be positioned such that at least a portion (FCP) of the circumference of the cross-sectional footprint (F) is adjacent to at least a portion (RCP) of the circumference of the predetermined region (R) that corresponds to at least a portion (FCP) of the circumference of the cross-sectional footprint (F).

[0050] The normal type battery 200N may be disposed on another portion of the predetermined region (R) where the special type battery 200S is not disposed.

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

[0052] In order to achieve the above object, the present invention provides an electric vehicle including the battery pack 10 and a wheel 20.

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

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

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

[0056] In an embodiment, the first side of the base frame 100 in the first direction may be the front of the vehicle.

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

[0058] Thus, the one side end of the predetermined region (R) in the first direction may be at the front of the vehicle.

[0059] In an embodiment, one end of the 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 toward one side in the first direction.

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

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

[0062] At least a portion of the special type batteries 200S arranged adjacent to at least a portion around one end of the first direction of the specified area (R) can be connected to the first motor 30A to supply power to the first motor 30A.

[0063] At least some of the batteries 200 of the normal type batteries 200N arranged in other parts of the specified area (R) where the special type batteries 200S are not arranged can be connected to the second motor 30B to supply power to the second motor 30B.

[0064] The special type battery 200S connected to the first motor 30A and the normal type battery 200N connected to the second motor 30B may differ from each other in at least one of 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 normal type battery 200N connected to the second motor 30B. Effect of the Invention

[0066] According to an embodiment 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 area (R) on an upper surface. The plurality of batteries 200 may have a cross-sectional footprint (F) shape defined by an outermost profile of a cross section taken parallel to the upper surface of the base frame 100. The plurality of batteries 200 may be disposed on the upper surface of the base frame 100 inside the predetermined area (R). The plurality of batteries 200 may include a plurality of types of batteries 200N, 200S having different cross-sectional footprint (F) shapes.

[0067] This can increase the output, capacity, and lifespan of the battery pack 10. Also, even if the predetermined area (R) has various shapes or sizes, the energy density of the space above the inner side of the predetermined area (R) can be increased. Also, since the predetermined area (R) may be expanded to any shape in which any one of the multiple types of batteries 200 is not arranged, or another type of battery 200 may be arranged on the expanded area, the battery pack 10 or the predetermined area (R) can be expanded to the maximum, thereby increasing the electric capacity of the battery pack 10.

[0068] According to an embodiment of the present invention, the predetermined region (R) may extend in a first direction and 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 direction and the second direction. The cross-sectional footprints (F) of the plurality of batteries 200 may extend in the first direction and the second direction. At least a portion of the plurality of batteries 200 may be arranged side by side in the first direction or the second direction. At least one type of battery 200 among the plurality of types of batteries 200 may be a special type battery 200S. At least a portion (FCP) around the cross-sectional footprint (F) of the special type battery 200S extends obliquely in a direction intersecting the first and second directions along at least a portion (RCP) around a predetermined region (R), but may extend such that the angular difference between the extension direction of each section of at least a portion (FCP) around the cross-sectional footprint (F) and the extension direction of each section of at least a 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 a portion (RCP) of the periphery of the predetermined region (R) of at least some of the batteries 200 extend obliquely in a direction intersecting the first direction or the second direction, a special type battery 200S having a shape corresponding to at least a portion (RCP) of the periphery of the predetermined region (R) can be arranged on the inside of the predetermined region (R), so that the energy density in the space above the inside of the predetermined region (R) can be increased. Thus, the output, capacity, and life of the battery pack 10 can be increased.

[0070] Furthermore, even if the predetermined region (R) has a various shape, the energy density in the space above the inner side of the predetermined region (R) can be increased.

[0071] Furthermore, even if the specified region (R) is expanded to have a periphery extending diagonally in a direction intersecting the first direction and the second direction, a special type of battery 200S can be placed on the expanded region, so that the battery pack 10 or the specified region (R) can be expanded to the maximum extent to increase the electrical capacity of the battery pack 10.

[0072] According to an embodiment of the present invention, the multiple types of batteries 200 may include at least one of a first type battery 200A, a second type battery 200B, a third type battery 200C, and a 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 periphery of the cross-sectional footprint (F) of the first type battery 200A may include a first side (a) extending in a first direction, a second side (b) and a third side (c) each extending from both ends of the first side (a) of the first type battery 200A in one direction by different lengths, and a fourth side (d) which corresponds to at least a portion (FCP) of the periphery of the cross-sectional footprint (F) and connects one ends of the second side (b) and third side (c) of the first type battery 200A in the second direction. The periphery of the cross-sectional footprint (F) of the second type battery 200B can include a first side (a) extending in a first direction, a second side (b) and a third side (c) each extending from both ends of the first side (a) of the second type battery 200B in the other direction in a different length from each other, and a fourth side (d) which corresponds to at least a portion (FCP) of the periphery of the cross-sectional footprint (F) and connects the other ends in the second direction of the second side (b) and the third side (c) of the second type battery 200B. The periphery of the cross-sectional footprint (F) of the third type battery 200C can include a first side (a) extending in a first direction, a second side (b) extending from one end or the other end of the first side (a) of the third type battery 200C in the first direction to one end of the second direction, and a third side (c) which corresponds to at least a portion (FCP) of the periphery of the cross-sectional footprint (F) and connects 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.The periphery of the cross-sectional footprint (F) of the fourth type battery 200D can include a first side (a) extending in a first direction, a second side (b) extending from one end or the other end of the first side (a) of the fourth type battery 200D in the first direction to the other end of the second direction, and a third side (c) which corresponds to at least a portion (FCP) of the periphery of 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 and the other end of the second side (b) of the fourth type battery 200D in the second direction.

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

[0074] In addition, even if one or the other side of the second direction of the specified region (R) has various shapes extending diagonally in a direction intersecting the first direction or the second direction, the energy density in the space above the inner side of the specified region (R) can be increased.

[0075] In addition, at least one side around the cross-sectional footprint (F) of the first / second / third / fourth type batteries 200A, 200B, 200C, 200D may extend in the first direction or the second direction. Therefore, the first / second / third / fourth type batteries 200A, 200B, 200C, 200D can be easily arranged in the second direction or the first direction with the adjacent battery 200, and even if an external force is applied in the first direction or the second direction, the batteries can be fixed to the base frame 100 along the second direction or the first direction perpendicular thereto, so that structural stability can be improved. In addition, the empty space between the batteries 200 can be minimized, and the energy density in the inner upper space of the predetermined region (R) can be increased.

[0076] According to an embodiment of the present invention, the plurality of types of batteries 200 may include at least one of a fifth type battery 200E and a sixth type battery 200F. The fifth type battery 200E and the sixth type battery 200F may correspond to a special type battery 200S. The periphery of 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) of the periphery of 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) of the periphery of 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 periphery of the cross-sectional footprint (F) of the sixth type battery 200F may include a first side (a) extending in the second direction, and a second side (b) whose both ends are connected to both ends of the first side (a) of the sixth type battery 200F, protruding from the first side (a) of the sixth type battery 200F in one or the other of the first directions, and corresponding to at least a portion (FCP) of the periphery of the cross-sectional footprint (F).

[0077] As a result, even if the predetermined region (R) includes a section (e.g., S in FIG. 1) whose width in the second direction changes toward one end or the other end in the first direction, such as a bell shape, the fifth / sixth type batteries 200E, 200F including the shape of the predetermined region (R) corresponding to the section (S) can be disposed on the inside of the predetermined region (R) corresponding to the section (S), so that the energy density in the space above the inside of the predetermined region (R) can be increased. Therefore, the output, capacity, and life of the battery pack 10 can be increased.

[0078] In addition, even if one side or the other side of the predetermined region (R) in the first direction has various shapes, the energy density in the space above the inner side of the predetermined region (R) can be increased.

[0079] Also, at least one side around the cross-sectional footprint (F) of the fifth / sixth type battery 200E, 200F may extend in the second direction. Therefore, the fifth / sixth type battery 200E, 200F can be easily arranged in line with the adjacent battery 200 in the first direction, and even if an external force is applied in the first direction, it can be fixed to the base frame 100 along the second direction perpendicular thereto, so that structural stability can be improved. Also, the empty space between the batteries 200 can be minimized, and the energy density in the space above the inner side of the predetermined region (R) can be increased.

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

[0081] This allows both a normal-type battery 200N with a normal shape having a rectangular cross-sectional footprint and a special-type battery 200S with a special shape having a trapezoidal or triangular cross-sectional footprint to be arranged inside the predetermined area (R). The normal-type battery 200N may be arranged in common on the inside of the predetermined area (R) of various shapes, regardless of the shape around the predetermined area (R), and has a simple structure, so that the manufacturing cost is lower than that of the special-type battery 200S. Therefore, by arranging both the normal-type battery 200N and the special-type battery 200S on the inside of the predetermined area (R), the manufacturing cost of the battery pack 10 can be reduced.

[0082] Also, the periphery of the cross-sectional footprint (F) of the normal battery 200N may extend in the first direction and the second direction. Therefore, the normal battery 200N can be easily arranged in the first direction or the second direction with the adjacent first / second / third / fourth / fifth / sixth type batteries 200A, 200B, 200C, 200D, 200E, 200F, and even if an external force is applied in the first direction or the second direction, it can be fixed to the base frame 100 along the second direction or the first direction perpendicular thereto, so that structural stability can be improved. Also, the empty space between the normal battery 200N and the first / second / third / fourth / fifth / sixth type batteries 200A, 200B, 200C, 200D, 200E, 200F can be minimized, and the energy density in the inner upper space of the predetermined region (R) can be increased.

[0083] According to an embodiment of the present invention, at least some of the batteries 200 of two or more types among the plurality of types may have different chemical characteristics according to the type, and may differ from each other in at least one of energy output, energy efficiency, and safety.

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

[0085] According to an embodiment of the present invention, the predetermined region (R) may extend in a first direction and 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 direction and the second direction. The cross-sectional footprints (F) of the plurality of batteries 200 may extend in the first direction and the second direction. At least a portion of the plurality of batteries 200 may be arranged side by side in the first direction or the second direction. The plurality of types of batteries 200 may include one or more normal type batteries 200N and one or more special type batteries 200S. The periphery of the cross-sectional footprint (F) of the normal battery 200N may include a first side (a) and a second side (b) arranged side by side in the second direction and extending 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 the same length in the second direction, respectively connecting one end and the other end of the first side (a) and the second side (b). At least a portion (FCP) of the periphery of the cross-sectional footprint (F) of the special battery 200S may extend obliquely in a direction intersecting the first direction and the second direction along at least a portion (RCP) around the predetermined region (R), but may extend such that the angle difference between the extension direction of each section of at least a portion (FCP) around the cross-sectional footprint (F) and the extension direction of each section of at least a 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 normal type batteries 200N may have different chemical properties and may differ from each other in at least one of energy output, energy efficiency, and safety.

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

[0087] According to an embodiment of the present invention, at least some of the special type batteries 200S may be arranged adjacent to at least a portion (RCP) of the circumference of the predetermined region (R) corresponding to at least a portion (FCP) of the circumference of the cross-sectional footprint (F). The normal type battery 200N may be arranged on another portion of the predetermined region (R) where the special type battery 200S is not arranged. At least some of the batteries 200 of the special type batteries 200S arranged adjacent to at least a portion (RCP) of the circumference of the predetermined region (R) are safer than at least some of the batteries 200 of the normal type batteries 200N not arranged adjacent to at least a portion (RCP) of the circumference of the predetermined region (R).

[0088] As a result, the special-type batteries 200S are arranged adjacent to and around a specified area (R), and the normal-type batteries 200N are arranged on other parts, thereby increasing the number of normal-type batteries 200N, simplifying the structure of the battery pack 10, reducing the manufacturing and maintenance costs of the battery pack 10, and making it easier to manufacture and maintain the battery pack 10.

[0089] In addition, a battery (special type battery) that can receive large external impacts because it is placed adjacent to the specified area (R) is safer than a battery (normal type battery) that cannot receive large external impacts because it is not placed adjacent to the specified area (R), so the safety of the battery pack 10 can be effectively improved at a low cost.

[0090] In addition, the special type battery 200S includes a portion extending diagonally in a direction intersecting the first and second directions along at least a portion (RCP) around the specified region (R) and may be structurally unstable and may have a large area facing the outside of the battery pack 10. Since the special type battery 200S does not include a portion extending diagonally in a direction intersecting the first and second directions, it is structurally stable and is safer than the normal type battery 200N, which may have a small 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.

[0091] According to an embodiment of the present invention, an electric vehicle may include a battery pack 10 and wheels 20. A base frame 100 of the battery pack 10 may extend in a first direction and a second direction and be coupled to the wheels 20. At least a portion of the circumference of one side end of a predetermined region (R) of the battery pack 10 in the first direction may correspond to at least a portion (RCP) of the circumference of the predetermined region (R). Thus, at least a part of the special type battery 200S may be disposed adjacent to at least a portion of the circumference of one side end of the predetermined region (R) in the first direction, the at least a portion (FCP) of the circumference of the cross-sectional footprint (F) corresponding to at least a portion (FCP) of the cross-sectional footprint (F).

[0092] As a result, a battery (special type battery) that can receive a large external impact because it is arranged adjacent to the periphery of one side end in the first direction of the specified region (R) is safer than a battery (normal type battery) that cannot receive a large external impact because it is not arranged adjacent to the periphery of one side end in the first direction of the specified region (R), and therefore the safety of the battery pack 10 installed in the electric vehicle 1 can be effectively improved at a low cost.

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

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

[0095] As a result, since the battery (special type battery) is placed at the front of the vehicle and can withstand a large impact from a vehicle collision, it is safer than other batteries (e.g., normal type batteries) that cannot withstand a large impact from a vehicle collision, and the safety of the battery pack 10 installed in the electric vehicle 1 can be effectively improved at a low cost.

[0096] According to an embodiment of the present invention, one end of the 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 toward one side in the first direction. The circumference of the predetermined region (R) belonging to the predetermined section (S) may correspond to at least a portion (RCP) of the circumference of the predetermined region (R).

[0097] As a result, even if the front of the predetermined region (R) is bell-shaped due to including the predetermined section (S), the highly safe special type battery 200S may be disposed adjacent to the periphery of the predetermined region (R) belonging to the predetermined section (S). Therefore, for example, in order to reduce air resistance, the front of the electric vehicle 1 is streamlined, and thus, even if 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 effectively improved at a low cost.

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

[0099] As a result, the motor 30 connected to the battery 200 having characteristics suitable for the driving environment or driving conditions can be driven easily with a simple configuration and at a low cost. Therefore, the energy efficiency, safety, and energy output of the electric vehicle can be optimized and improved depending on the driving environment or driving conditions.

[0100] In addition, since the first / second motors 30A, 30B and the special / normal batteries 200S, 200N connected to the first / second motors 30A, 30B are located close to each other, wiring is simplified and manufacturing and maintenance costs for the electric vehicle can be reduced.

[0101] According to the 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 normal type battery 200N connected to the second motor 30B.

[0102] As a result, in a driving environment or driving conditions that require high energy efficiency and safety, the first motor 30A connected to the special type battery 200S having characteristics corresponding thereto can be driven. On the other hand, in a driving environment or driving conditions that require high output, the second motor 30B connected to the normal type battery 200N having characteristics corresponding thereto can be driven. Thus, the energy efficiency, safety, energy output, etc. of the electric vehicle can be optimized and improved depending on the driving environment or driving conditions.

[0103] The above-mentioned effects and specific effects of the present invention will be described in conjunction with the following description of the preferred embodiment of the invention. [Brief description of the drawings]

[0104] [Figure 1] 1 is a schematic plan view illustrating a configuration of a portion of an electric vehicle including a battery pack according to an embodiment of the present invention, in which a battery is removed from the battery pack; [Diagram 2] FIG. 2 is a plan view showing an electric vehicle including a battery pack according to a first embodiment, the battery pack being arranged in the battery pack of FIG. 1 with a battery installed therein; [Diagram 3] FIG. 2 is a plan view showing an electric vehicle including a battery pack according to a second embodiment of the present invention, the plan view being a schematic diagram showing a state in which a battery is installed in the battery pack of FIG. 1; [Figure 4]10 is a plan view showing an electric vehicle including a battery pack according to a third embodiment of the present invention; FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0105] The above-mentioned objects, features and advantages will be described in detail below with reference to the accompanying drawings, so that a person having ordinary skill in the art to which the present invention pertains can easily implement the technical idea of ​​the present invention. In describing the present invention, if a detailed description of a known technology according to the present invention is deemed to make the gist of the present invention unclear, the detailed description will be omitted. Hereinafter, a preferred embodiment according to 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 the terms "first", "second", etc. are used to describe various components, it is understood that these components are not limited by these terms. These terms are used merely to distinguish one component from another, and it is understood that a first component may also be a second component unless otherwise specified.

[0107] Unless otherwise specified to the contrary in the entire specification, each element may be singular or plural.

[0108] Hereinafter, when an arbitrary structure is arranged on the "top (or bottom)" of a component or "above (or below)" a component, it means that the arbitrary structure is not only arranged in contact with the upper surface (or lower surface) of the component, but also that other structures may be interposed between the component and the arbitrary structure arranged on (or below) the component.

[0109] In addition, when a component is described as being "coupled," "coupled," or "connected" to another component, it should be understood that the components may be directly coupled or connected to each other, but that there may be other components "intervening" between each component, or each component may be "coupled," "coupled," or "connected" via other components.

[0110] As used herein, singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "include" should not be interpreted as including all of the multiple components or multiple steps described in the specification, and should be interpreted as including some of the components or steps that may not be included or may include additional components or steps.

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

[0112] [Battery pack] 1 to 4, a battery pack 10 according to one embodiment may include a base frame 100 and a plurality of batteries 200.

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

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

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

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

[0117] A plurality of batteries 200 may be arranged on the upper surface of the base frame 100 inside the predetermined region (R).

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

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

[0120] The plurality of batteries 200 may include a plurality of types of batteries 200N, 200S having different cross-sectional footprint (F) shapes.

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

[0122] When the plurality of batteries 200, i.e., the plurality of types of batteries 200 having different shapes of cross-sectional footprints (F) are arranged inside the predetermined area (R), the energy density of the space inside the predetermined area (R) may be increased compared to when one or more batteries 200 corresponding to any one of the plurality of types are arranged inside the predetermined area (R). That is, the maximum value of the sum of the areas of the shapes of the cross-sectional footprints (F) of the plurality of batteries 200 made up of the plurality of types of batteries 200N, 200S when arranged inside the predetermined area (R) may be even larger than the maximum value of the sum of the areas of the shapes of the cross-sectional footprints of the plurality of batteries 200 made up of a single type of battery 200N when arranged inside the predetermined area (R).

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

[0124] This can increase the output, capacity, and lifespan of the battery pack 10. In addition, even if the predetermined area (R) has various shapes or sizes, the energy density in the space above the inner side of the predetermined area (R) can be increased. In addition, even if the predetermined area (R) is expanded to an arbitrary shape in which any one of the multiple types of batteries 200 cannot be placed, another type of battery 200 can be placed on the expanded area, so that the battery pack 10 or the predetermined area (R) can be expanded to the maximum extent to increase the electric capacity of the battery pack 10.

[0125] A cross-sectional footprint (F) of the plurality of batteries 200 may extend in a first direction and a second direction.

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

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

[0128] The special type of battery 200S may be a battery 200 having at least a portion (FCP) of its periphery around a cross-sectional footprint (F) that extends obliquely along at least a portion (RCP) of its periphery 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 a straight line or a curved line.

[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 exactly.

[0131] For example, the angle difference between the extension direction of each section of at least a portion (FCP) around the cross-sectional footprint (F) of the special type battery 200S and the extension direction of each section of at least a portion (RCP) around the predetermined region (R) corresponding to each section (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 a portion (RCP) of the periphery of the predetermined region (R) extends obliquely in a direction intersecting the first direction or the second direction in which at least some of the batteries 200 are arranged side by side on the inside of the predetermined region (R), a special type battery 200S having a shape corresponding to at least a portion (RCP) of the periphery of the predetermined region (R) can be arranged on the inside of the predetermined region (R), so that the energy density in the space on the inside of the predetermined region (R) can be increased. Thus, the output, capacity, and life 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 inner side of the predetermined region (R) can be increased.

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

[0135] The multiple types of batteries 200 can include at least one of a first type battery 200A, a second type battery 200B, a third type battery 200C, and a fourth type battery 200D.

[0136] 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 described above.

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

[0138] The periphery of the cross-sectional footprint (F) of the second type battery 200B can include a first side (a) extending in a first direction, a second side (b) and a third side (c) each extending from both ends of the first side (a) of the second type battery 200B to the other end in the second direction (e.g., the right side) by different lengths, and a fourth side (d) which corresponds to at least a portion (FCP) of the periphery of the cross-sectional footprint (F) described above and connects the other ends in the second direction (e.g., the right end) of the second side (b) and the third side (c) of the second type battery 200B (FIG. 2).

[0139] The fourth side (d) of the first type battery 200A and the second type battery 200B, which corresponds to at least a portion (FCP) around the cross-sectional footprint (F), may be a straight line as in FIG. 2, or may be a curved line, unlike FIG. 2.

[0140] The periphery of the cross-sectional footprint (F) of the third type battery 200C can include a first side (a) extending in a first direction, a second side (b) extending from one end (e.g., the front end) or the other end (e.g., the rear end) of the first side (a) of the third type battery 200C in the first direction to one side (e.g., the left side) in the second direction, and a third side (c) which corresponds to at least a portion (FCP) of the periphery of the cross-sectional footprint (F) described above and connects the other end or one end of the first side (a) of the third type battery 200C in the first direction to one end of the second side (b) of the third type battery 200C in the second direction (FIG. 3).

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

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

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

[0144] In addition, even if one or the other side of the second direction of the specified region (R) has various shapes extending diagonally in a direction intersecting the first direction or the second direction, the energy density in the space above the inner side of the specified region (R) can be increased.

[0145] In addition, at least one side around the cross-sectional footprint (F) of the first / second / third / fourth type batteries 200A, 200B, 200C, 200D may extend in the first direction or the second direction. Therefore, the first / second / third / fourth type batteries 200A, 200B, 200C, 200D can be easily arranged in the second direction or the first direction with the adjacent battery 200, and even if an external force is applied in the first direction or the second direction, the batteries are fixed to the base frame 100 along the second direction or the first direction perpendicular thereto, so that structural stability can be improved. In addition, the empty space between the batteries 200 can be minimized, and the energy density in the inner upper space of the predetermined region (R) can be increased.

[0146] The multiple types of batteries 200 can include at least one of a fifth type battery 200E and a sixth type battery 200F.

[0147] The fifth type battery 200E and the sixth type battery 200F may correspond to the special type battery 200S described above.

[0148] The periphery of the cross-sectional footprint (F) of the fifth type battery 200E can include 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) that corresponds to at least a portion (FCP) of the periphery of the cross-sectional footprint (F) described above and connects 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) that corresponds to at least a portion (FCP) of the periphery of the cross-sectional footprint (F) described above and connects the other end of the first side (a) and the second side (b) of the fifth type battery 200E in the second direction (FIG. 2).

[0149] The third side (c) and fourth side (d) of the fifth type battery 200E, which correspond to at least a portion (FCP) around the cross-sectional footprint (F), may be straight as in FIG. 2, or may be curved, unlike FIG. 2.

[0150] The periphery of the cross-sectional footprint (F) of the sixth type battery 200F can include a first side (a) extending in the second direction, and a second side (b) whose both ends are connected to both ends of the first side (a) of the sixth type battery 200F, protruding from the first side (a) of the sixth type battery 200F in one or the other of the first directions, and corresponding to at least a portion (FCP) of the periphery of the cross-sectional footprint (F) described above (FIG. 4).

[0151] The second side (b) of the sixth type battery 200F, which corresponds to at least a portion (FCP) around the cross-sectional footprint (F), may be a curve as in FIG. 4, or, unlike FIG. 4, 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 FIG. 1) whose width in the second direction changes toward one end or the other end in the first direction, such as a bell shape, the fifth / sixth type batteries 200E, 200F including the shape of the predetermined region (R) corresponding to the section (S) can be disposed on the inside of the predetermined region (R) corresponding to the section (S), so that the energy density in the space above the inside of the predetermined region (R) can be increased. Therefore, the output, capacity, and life of the battery pack 10 can be increased.

[0153] In addition, even if one side or the other side of the predetermined region (R) in the first direction has a different shape, the energy density in the space above the inner side of the predetermined region (R) can be increased.

[0154] Also, at least one side around the cross-sectional footprint (F) of the fifth / sixth type battery 200E, 200F may extend in the second direction. Therefore, the fifth / sixth type battery 200E, 200F can be easily arranged in line with the adjacent battery 200 in the first direction, and even if an external force is applied in the first direction, the fifth / sixth type battery 200E, 200F is fixed to the base frame 100 along the second direction perpendicular thereto, so that structural stability can be improved. Also, the empty space between the batteries 200 can be minimized, and the energy density in the space above the inner side of the predetermined region (R) can be increased.

[0155] Meanwhile, the first direction and the second direction used to realize the above-mentioned first / second / third / fourth / fifth / sixth type batteries 200A, 200B, 200C, 200D, 200E, 200F may correspond to the front-rear direction and the left-right direction of the electric vehicle 1, respectively, as shown in the drawings. However, the present invention is not limited to these configurations. For example, the first direction and the second direction may correspond to the left-right direction and the front-rear direction of the electric vehicle 1, respectively, unlike the drawings.

[0156] The multiple types of batteries 200 can include normal type batteries 200N in addition to the special type batteries 200S described above.

[0157] The periphery of 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 the second direction and extending 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 the same length in the second direction, respectively connecting one end and the other end of the first side (a) and the second side (b) of the standard battery 200N.

[0158] This allows both the normal-type battery 200N of a normal shape, whose cross-sectional footprint is a rectangle, and the special-type battery 200S of a special shape, whose cross-sectional footprint is, for example, a trapezoid or a triangle, to be arranged on the inside of the predetermined area (R). The normal-type battery 200N may be commonly arranged on the inside of the predetermined area (R) of various shapes, regardless of the shape around the predetermined area (R), and since the structure is simple, the manufacturing cost is lower than that of the special-type battery 200S. Therefore, by arranging both the normal-type battery 200N and the special-type battery 200S on the inside of the predetermined area (R), the manufacturing cost of the battery pack 10 can be reduced.

[0159] Also, the periphery of the cross-sectional footprint (F) of the normal battery 200N may extend in the first direction and the second direction. Therefore, the normal battery 200N can be easily arranged in the first direction or the second direction with the adjacent first / second / third / fourth / fifth / sixth type batteries 200A, 200B, 200C, 200D, 200E, 200F, and even if an external force is applied in the first direction or the second direction, the normal battery 200N is fixed to the base frame 100 along the second direction or the first direction perpendicular thereto, so that the structural stability can be improved. Also, the empty space between the normal battery 200N and the first / second / third / fourth / fifth / sixth type batteries 200A, 200B, 200C, 200D, 200E, 200F can be minimized, and the energy density in the space above the inner side of the predetermined region (R) can be increased.

[0160] At least some of the two or more types of batteries 200 among the plurality of types may have different chemical characteristics according to the type, and may differ from each other in at least one of energy output, energy efficiency, and safety. Here, the chemical characteristics refer to, for example, the type of active material, the rate and amount of chemical reaction, etc., but are not limited thereto.

[0161] Specifically, for example, at least some of the special type batteries 200S and at least some of the normal type batteries 200N may have different chemical characteristics and may differ from each other in at least one of the energy output, the energy efficiency, and the safety. Also, the above-mentioned first / second / third / fourth / fifth / sixth type batteries 200A, 200B, 200C, 200D, 200E, and 200F, which correspond to the special type battery 200S but are different in type, may have different chemical characteristics and may differ from each other in at least one of the energy output, the energy efficiency, and the safety.

[0162] As a result, the characteristics of the battery 200 may vary along with the shape of the battery 200 disposed inside the predetermined region (R). As a result, the energy density of the battery pack 10 may increase, and the structure, arrangement, configuration, or performance of the battery pack 10 may be optimized and improved depending on the application or environment. In addition, the batteries 200 having different chemical characteristics may be easily distinguished based on the shape of the battery 200 (e.g., the shape of the cross-sectional footprint).

[0163] At least some of the special-type batteries 200S may be arranged such that at least a portion (FCP) of the circumference of the cross-sectional footprint (F) is adjacent to at least a portion (RCP) of the circumference of the predetermined region (R) that corresponds to at least a portion (FCP) of the circumference of the cross-sectional footprint (F), but are not limited to these configurations.

[0164] The normal type battery 200N may be disposed on another portion of the predetermined region (R) where the special type battery 200S is not disposed.

[0165] At least some of the batteries 200 among the special type batteries 200S that are arranged adjacent to at least a portion (RCP) around the aforementioned specified area (R) are safer than at least some of the batteries 200 among the normal type batteries 200N that are not arranged adjacent to at least a portion (RCP) around the specified area (R).

[0166] As a result, the special-type batteries 200S are arranged adjacent to and around a specified area (R), and the normal-type batteries 200N are arranged on other locations, thereby increasing the number of normal-type batteries 200N, simplifying the structure of the battery pack 10, reducing the manufacturing and maintenance costs of the battery pack 10, and making it easier to manufacture and maintain the battery pack 10.

[0167] In addition, since a battery (special type battery) that can receive large external impacts because it is placed adjacent to the specified area (R) is safer than a battery (normal type battery) that cannot receive large external impacts because it is not placed adjacent to the specified area (R), the safety of the battery pack 10 can be effectively improved at a low cost.

[0168] In addition, since the special type battery 200S includes a portion extending diagonally in a direction intersecting the first and second directions along at least a portion (RCP) around the specified region (R), it may be structurally unstable and the area facing the outside of the battery pack 10 may be large. Since the special type battery 200S does not include a portion extending diagonally in a direction intersecting the first and second directions, it is structurally stable and the area facing the outside of the battery pack 10 may be small. Since the special type battery 200S is safer than the normal type battery 200N, the safety of the battery pack 10 may be effectively improved at a low cost.

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

[0170] The battery pack 10 is as described above. A case where the above-described battery pack 10 is used in an electric vehicle 1 will be considered below.

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

[0173] For this reason, at least some of the special type batteries 200S may have at least a portion (FCP) around the cross-sectional footprint (F) positioned adjacent to at least a portion (RCP) around one end of the first direction of the specified region (R) that corresponds to at least a portion (FCP) around the cross-sectional footprint (F).

[0174] In this case, at least some of the batteries 200 among the special type batteries 200S that are arranged adjacent to at least a portion (RCP) of the area around one side end in the first direction of the specified area (R) are safer than at least some of the batteries 200 among the normal type batteries 200N that are not arranged adjacent to at least a portion (RCP) of the area around one side end in the first direction of the specified area (R).

[0175] As a result, a battery (special type battery) that can receive a large external impact because it is arranged adjacent to the periphery of one side end in the first direction of the specified region (R) is safer than a battery (normal type battery) that cannot receive a large external impact because it is not arranged adjacent to the periphery of one side end in the first direction of the specified region (R), and therefore the safety of the battery pack 10 installed in the electric vehicle 1 can be effectively improved at a low cost.

[0176] In addition, the special type battery 200S may be structurally unstable since it includes a portion extending diagonally in a direction intersecting the first and second directions along at least a portion (RCP) around one end of the specified region (R) in the first direction, and may have a large area facing the outside of the battery pack 10. Since the special type battery 200S does not include a portion extending diagonally in a direction intersecting the first and second directions, it is structurally stable and is safer than the normal type battery 200N which may have a small 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 effectively improved at a low cost.

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

[0178] As a result, a battery (special type battery) that is placed in the front of the vehicle and can withstand a large impact from a vehicle collision is safer than other batteries (e.g., normal type batteries) that cannot withstand a large impact from a vehicle collision, so the safety of the battery pack 10 installed in the electric vehicle 1 can be effectively improved at a low cost.

[0179] One end of the 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 toward one side in the first direction.

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

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

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

[0183] The wheels 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 may be provided on one side and the other side of the electric vehicle 1 in the first direction, respectively.

[0185] The first motor 30A may be coupled to one or more of the first wheels 20A.

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

[0187] At least a portion of the special type batteries 200S, which are arranged adjacent to at least a portion around one end of the first direction of the specified area (R), can be connected to the first motor 30A to supply power to the first motor 30A.

[0188] At least some of the batteries 200 among the normal type batteries 200N that are placed in other parts of the specified area (R) where the special type batteries 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 normal type battery 200N connected to the second motor 30B may differ from each other in at least one of energy output, energy efficiency, and safety.

[0190] As a result, the motor 30 connected to the battery 200 having characteristics suitable for the driving environment or driving conditions can be driven easily and inexpensively with a simple configuration, and thus the energy efficiency, safety, and energy output of the electric vehicle can be optimized and improved depending on the driving environment or driving conditions.

[0191] In addition, the first / second motors 30A, 30B and the special / normal batteries 200S, 200N connected to the first / second motors 30A, 30B are located close to each other, making wiring easy and reducing manufacturing and maintenance costs.

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

[0193] As a result, in a driving environment or driving conditions that require high energy efficiency and safety, the first motor 30A connected to the special type battery 200S having characteristics corresponding thereto can be driven. Meanwhile, in a driving environment or driving conditions that require high output, the second motor 30B connected to the normal type battery 200N having characteristics corresponding thereto can be driven. Thus, the energy efficiency, safety, energy output, etc. of the electric vehicle can be optimized and improved depending on the driving environment or driving conditions.

[0194] Meanwhile, the drawings show only the case where the battery pack 10 is used in the electric vehicle 1, but the present invention is not limited to this configuration. In other words, the battery pack 10 described above can be used in various devices in addition to the electric vehicle 1.

[0195] It should be understood that the above-described embodiments are illustrative in all respects and are not limiting, and the scope of the present invention is defined by the following claims rather than the above detailed description. Any modifications and variations that can be achieved within the meaning and scope of the following claims, as well as equivalent concepts, should be interpreted as being included in the scope of the present invention.

[0196] Although the present invention has been described above with reference to the illustrative drawings, the present invention is not limited to the embodiments and drawings disclosed in this specification, and it is obvious that various modifications can be made by those skilled in the art within the scope of the technical concept of the present invention. Furthermore, even if the effects of the configuration of the present invention are not explicitly described and explained while describing the embodiments of the present invention, it is natural that the effects that can be predicted by the configuration should also be recognized. [Explanation of symbols]

[0197] 1 Electric vehicles 10 Battery pack 20 wheels 20A 1st wheel 20B 2nd wheel 30 Motor 30A First Motor 30B Second motor 100 Base Frame R Predefined area 200 Battery F Section 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; a plurality of batteries (200) having a cross-sectional footprint (F) defined by an outermost profile of a cross section taken parallel to a top surface of the base frame (100); The plurality of batteries (200) are disposed on an 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, 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 direction and the second direction, the cross-sectional footprint (F) of the plurality of batteries (200) extends in the first direction and in the second direction; At least some of the plurality of batteries (200) are arranged side by side in the first direction or the second direction, At least one type of battery (200) among the plurality of types of batteries (200) is a special type battery (200S); At least a portion (FCP) around the cross-sectional footprint (F) of the special type battery (200S) extends obliquely along at least a portion (RCP) around the specified region (R) in a direction intersecting the first direction and the second direction, while an angular difference between an extension direction of each section of at least a portion (FCP) around the cross-sectional footprint (F) and an extension direction of each section of at least a portion (RCP) around the specified region (R) corresponding to each section is smaller than a predetermined angle. Battery pack.

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

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

5. At least some of the two or more types of batteries (200) among the plurality of types have different chemical characteristics according to the type, and at least one of energy output, energy efficiency, and safety is different from each other; 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 direction and the second direction, the cross-sectional footprint (F) of the plurality of batteries (200) extends in the first direction and in the second direction; At least some of the plurality of batteries (200) are arranged side by side in the first direction or the second direction, The plurality of types of batteries (200) include at least one normal type battery (200N) and at least one special type battery (200S), The periphery of the cross-sectional footprint (F) of the standard battery (200N) includes a first side (a) and a second side (b) arranged side by side in the second direction and extending 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 the same length in the second direction, connecting one end and the other end of the first side (a) and the second side (b), respectively; At least a portion (FCP) around the cross-sectional footprint (F) of the special type battery (200S) extends obliquely along at least a portion (RCP) around the specified region (R) in a direction intersecting the first direction and the second direction, but the angle difference between the extension direction of each section of at least a portion (FCP) around the cross-sectional footprint (F) and the extension direction of each section of at least a portion (RCP) around the specified region (R) corresponding to each section is smaller than a predetermined angle; At least a portion of the special type batteries (200S) and at least a portion of the normal type batteries (200N) have different chemical properties and at least one of energy output, energy efficiency, and safety is different from each other.

6. The battery pack according to claim 5.

7. At least some of the special type batteries (200S) are arranged adjacent to at least a portion (FCP) of the circumference of the cross-sectional footprint (F) of the predetermined region (R) that corresponds to at least a portion (FCP) of the circumference of the cross-sectional footprint (F); the normal type battery (200N) is disposed on another portion of the predetermined region (R) where the special type battery (200S) is not disposed, At least some of the special type batteries (200S) arranged adjacent to at least a portion (RCP) around the specified region (R) have a higher safety than at least some of the normal type batteries (200N) not arranged adjacent to at least a portion (RCP) around the specified region (R); 7. The battery pack according to claim 6.

8. An electric vehicle including a battery pack (10) according to claim 7, Wheels 20 included; The base frame (100) extends in a first direction and a second direction and is coupled to the wheels (20); At least a portion of the circumference of the first direction one end of the predetermined region (R) corresponds to at least a portion of the circumference of the predetermined region (R), As a result, at least a portion of the special type battery (200S) is disposed adjacent to at least a portion of the circumference of the cross-sectional footprint (F) of the predetermined region (R) corresponding to at least a portion of the circumference of the cross-sectional footprint (F), at least a portion of the circumference of the first direction one side end of the predetermined region (R); Electric vehicle.

9. One 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 a rear side of the vehicle, As a result, the first direction one side end of the predetermined region (R) is the front of the vehicle.

9. The electric vehicle of claim 8.

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

11. The motor includes a first motor (30A) and a second motor (30B) provided on one side and the other side of the first direction, respectively; The wheels (20) include one or more first wheels (20A) provided on one side in the first direction and coupled to the first motor (30A), and one or more second wheels (20B) provided on the other side in the first direction and coupled to the second motor (30B), At least a part of the special type batteries (200S) arranged adjacent to at least a portion around one end of the predetermined region (R) in the first direction is connected to the first motor (30A) to supply power to the first motor (30A); At least some of the normal type batteries (200N) arranged in other parts of the predetermined region (R) where the special type batteries (200S) are not arranged are connected to the second motor (30B) to supply power to the second motor (30B); The special type battery (200S) connected to the first motor (30A) and the normal type battery (200N) connected to the second motor (30B) are different from each other in at least one of energy output, energy efficiency, and safety.

10. The electric vehicle of 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 normal type battery (200N) connected to the second motor (30B); 12. An electric vehicle as claimed in claim 11.

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