Battery pack and electric vehicle including same

Abstract

The present invention provides a battery pack including a base frame (100) having a plate shape and having a specific region (R) on an upper surface thereof; and a plurality of cells (200) having a shape of a cross-sectional area (F) defined by an outermost contour placed in a cross-section parallel to the upper surface of the base frame (100). A plurality of batteries (200) may be provided on the upper surface of the base frame (100) within a specific region (R). The plurality of cells (200) may include a plurality of types of cells (200N and 200S) having cross-sectional regions (F) of different shapes. At least a portion (RCP) of the periphery of the specific region (R) may extend obliquely. At least a portion (FCP) of a peripheral edge of a cross-sectional region (F) of a special type of battery (200S), which is at least one of the plurality of types of batteries (200), may extend obliquely along at least a portion (RCP) of a peripheral edge of a specific region (R).

Description

Technical Field

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0053434, filed on April 29, 2022, the entire contents of which 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 that can increase energy density and optimize and improve energy efficiency, safety and output power according to a driving environment or driving conditions, and an electric vehicle including the battery pack. Background Art

[0003] As electric vehicles enter the mass market, the performance of battery packs embedded in electric vehicles becomes increasingly important. For example, the performance of a battery pack may refer to the capacity, output power, energy efficiency, and safety of the battery pack. Here, a plurality of batteries (e.g., a battery module) may be accommodated in the battery pack.

[0004] In order to increase the capacity of the battery pack, the energy density of the space within the battery pack can be increased, or the size of the battery pack itself can be increased. That is, in order to increase the energy density of the space within the battery pack, the size or number of batteries set in the battery pack can be maximized and the wasted space can be reduced.

[0005] To improve the output power, energy efficiency or safety of a battery pack, the chemical properties of the battery can be adjusted. For example, the chemical properties of the battery can be controlled by changing the active materials used in the battery or adjusting the rate or amount of the battery's chemical reaction.

[0006] However, a plurality of single-type batteries having the same shape and the same chemical properties are usually arranged in one battery pack. Therefore, since the battery pack cannot be filled with batteries of a single type (shape), space is wasted, or the size of the battery pack itself is reduced to correspond to the size of the plurality of single-type batteries, which reduces the capacity of the battery pack. In addition, since the battery pack includes only a single type of battery, the output power, energy efficiency or safety of the battery pack cannot be optimized.

[0007] Korean Patent Publication No. 10-2016-0101382 discloses a conventional battery pack in which a plurality of single-type batteries having the same shape and the same chemical properties are arranged. Therefore, in Korean Patent Publication No. 10-2016-0101382, the above-mentioned problem also occurs. Summary of the invention

[0008] Technical issues

[0009] The present invention aims to provide a battery pack in which the energy density of a space in which a battery (200) is arranged is increased.

[0010] The present invention is directed to providing a battery pack having increased electric capacity.

[0011] The present invention is directed to a battery pack in which energy density is increased even when a space in which a battery (200) is arranged has various shapes or various sizes.

[0012] The present invention is directed to providing a battery pack in which structural stability is improved and manufacturing and maintenance costs are reduced.

[0013] The present invention is directed to providing a battery pack in which energy density can be increased while the structure, arrangement, configuration or performance can be optimized and improved according to the purpose or environment.

[0014] The present invention aims to provide a battery pack which improves the safety of the battery pack at a low cost.

[0015] The present invention aims to provide an electric vehicle, the energy efficiency, safety and output power of which can be optimized and improved according to the driving environment or driving conditions.

[0016] The present invention is directed to providing an electric vehicle having reduced manufacturing and maintenance costs.

[0017] The purpose of the present invention is not limited to the above purpose, and other purposes and advantages of the present invention will be understood through the following description, and will be more clearly understood through the embodiments of the present invention. It is also easy to understand that the purposes and advantages of the present invention can be realized and obtained by the means and combinations described in the attached claims.

[0018] Technical Solution

[0019] According to an embodiment of the present invention, a battery pack (10) includes a base frame (100) and a plurality of batteries (200).

[0020] The base frame (100) may have a plate shape, and may have a specific area (R) on an upper surface thereof.

[0021] The plurality of batteries (200) may have a shape of a cross-sectional footprint (F) defined by an outermost profile of a cross section placed parallel to an upper surface of the base frame (100).

[0022] A plurality of batteries (200) may be disposed on an upper surface of the base frame (100) within a specific region (R).

[0023] The plurality of batteries (200) may include a plurality of types of batteries (200N and 200S) having cross-sectional areas (F) of different shapes.

[0024] The specific region (R) may extend in a first direction and a second direction perpendicular to the first direction.

[0025] At least a portion (RCP) of the periphery of the specific region (R) may extend obliquely in a direction intersecting the first direction and the second direction.

[0026] The cross-sectional area (F) of the plurality of batteries (200) may extend in a first direction and a second direction.

[0027] At least a portion of the plurality of batteries (200) may be arranged side by side in the first direction or the second direction.

[0028] Among the plurality of types of batteries (200), at least one type of battery (200) may be a special type of battery (200S).

[0029] At least a portion (FCP) of the periphery of the cross-sectional area (F) of a special type of battery (200S) can extend obliquely along at least a portion (RCP) of the periphery of a specific region (R) in a direction intersecting the first direction and the second direction, and can be extended so that the angle difference between the extension direction of each segment of at least a portion (FCP) of the periphery of the cross-sectional area (F) and the extension direction of each segment of at least a portion (RCP) of the periphery of the specific region (R) corresponding to each segment of at least a portion (FCP) of the periphery of the cross-sectional area (F) is less than a specific angle.

[0030] The plurality of types of batteries (200) may include at least one of a first type of battery (200A), a second type of battery (200B), a third type of battery (200C), and a fourth type of battery (200D).

[0031] The first type of battery (200A), the second type of battery (200B), the third type of battery (200C), and the fourth type of battery (200D) may each correspond to a specific type of battery (200S).

[0032] The periphery of the cross-sectional area (F) of the first type of battery (200A) may include a first side (a), a second side (b), a third side (c) and a fourth side (d), the first side (a) extending in the first direction, the second side (b) and the third side (c) each extending from both ends of the first side (a) of the first type of battery (200A) to one side in the second direction by different lengths, and the fourth side (d) corresponds to at least a portion (FCP) of the periphery of the cross-sectional area (F) and connects one end of the second side (b) of the first type of battery (200A) in the second direction with one end of the third side (c) in the second direction.

[0033] The periphery of the cross-sectional area (F) of the second type of battery (200B) may include a first side (a), a second side (b), a third side (c) and a fourth side (d), wherein the first side (a) extends in the first direction, the second side (b) and the third side (c) each extend different lengths from both ends of the first side (a) of the second type of battery (200B) to the other side in the second direction, and the fourth side (d) corresponds to at least a portion (FCP) of the periphery of the cross-sectional area (F) and connects the other end of the second side (b) of the second type of battery (200B) in the second direction with the other end of the third side (c) in the second direction.

[0034] The periphery of the cross-sectional area (F) of the third type of battery (200C) may include a first side (a), a second side (b) and a third side (c), the first side (a) extending in the first direction, the second side (b) extending from one end or the other end of the first side (a) of the third type of battery (200C) in the first direction to one side in the second direction, and the third side (c) corresponding to at least a portion (FCP) of the periphery of the cross-sectional area (F) and connecting the other end or one end of the first side (a) of the third type of battery (200C) in the first direction with one end of the second side (b) of the third type of battery (200C) in the second direction.

[0035] The periphery of the cross-sectional area (F) of the fourth type of battery (200D) may include a first side (a), a second side (b) and a third side (c), the first side (a) extending in the first direction, the second side (b) extending from one end or the other end of the first side (a) of the fourth type of battery (200D) in the first direction to the other side in the second direction, and the third side (c) corresponding to at least a portion (FCP) of the periphery of the cross-sectional area (F) and connecting the other end or one end of the first side (a) of the fourth type of battery (200D) in the first direction with the other end of the second side (b) of the fourth type of battery (200D) in the second direction.

[0036] The plurality of types of batteries (200) may include at least one of a fifth type of battery (200E) and a sixth type of battery (200F).

[0037] The fifth type of battery (200E) and the sixth type of battery (200F) may each correspond to a special type of battery (200S).

[0038] The periphery of the cross-sectional area (F) of the fifth type of battery (200E) may include a first side (a), a second side (b), a third side (c) and a fourth side (d), the first side (a) and the second side (b) being arranged side by side in the first direction and extending in the second direction, the third side (c) corresponding to at least a portion (FCP) of the periphery of the cross-sectional area (F) and connecting one end of the first side (a) of the fifth type of battery (200E) in the second direction with one end of the second side (b) in the second direction, and the fourth side (d) corresponding to at least a portion (FCP) of the periphery of the cross-sectional area (F) and connecting the other end of the first side (a) of the fifth type of battery (200E) in the second direction with the other end of the second side (b) in the second direction.

[0039] The periphery of the cross-sectional area (F) of the sixth type of battery (200F) may include a first side (a) and a second side (b), the first side (a) extending in the second direction, both ends of the second side (b) connected to both ends of the first side (a) of the sixth type of battery (200F), and protruding from the first side (a) of the sixth type of battery (200F) to one side or the other side in the first direction and corresponding to at least a portion (FCP) of the periphery of the cross-sectional area (F).

[0040] The multiple types of batteries (200) may include a common type of battery (200N).

[0041] The periphery of the cross-sectional area (F) of a common type of battery (200N) may include a first side (a), a second side (b), a third side (c) and a fourth side (d), wherein the first side (a) and the second side (b) are arranged side by side in the second direction and extend the same length in the first direction, and the third side (c) and the fourth side (d) are arranged side by side in the first direction, extend the same length in the second direction and respectively connect one end of the first side (a) of the common type of battery (200N) with one end of the second side (b) and the other end of the first side (a) with the other end of the second side (b).

[0042] At least a portion of the batteries (200) of two or more types among the plurality of types may have different chemical properties according to their respective types, and thus may differ in at least one of energy output, energy efficiency, and safety.

[0043] The specific region (R) may extend in a first direction and a second direction perpendicular to the first direction.

[0044] At least a portion (RCP) of the periphery of the specific region (R) may extend obliquely in a direction intersecting the first direction and the second direction.

[0045] The cross-sectional area (F) of the plurality of batteries (200) may extend in a first direction and a second direction.

[0046] At least a portion of the plurality of batteries (200) may be arranged side by side in the first direction or the second direction.

[0047] The multiple types of batteries (200) may include one or more general type batteries (200N) and one or more special type batteries (200S).

[0048] The periphery of the cross-sectional area (F) of a common type of battery (200N) may include a first side (a) and a second side (b), a third side (c) and a fourth side (d), the first side (a) and the second side (b) being arranged side by side in the second direction and extending the same length in the first direction, the third side (c) and the fourth side (d) being arranged side by side in the first direction, extending the same length in the second direction and respectively connecting one end of the first side (a) with one end of the second side (b) and the other end of the first side (a) with the other end of the second side (b).

[0049] At least a portion (FCP) of the periphery of the cross-sectional area (F) of a special type of battery (200S) can extend obliquely along at least a portion (RCP) of the periphery of a specific region (R) in a direction intersecting the first direction and the second direction, and can be extended so that the angle difference between the extension direction of each segment of at least a portion (FCP) of the periphery of the cross-sectional area (F) and the extension direction of each segment of at least a portion (RCP) of the periphery of the specific region (R) corresponding to each segment of at least a portion (FCP) of the periphery of the cross-sectional area (F) is less than a specific angle.

[0050] At least a portion of the special type of batteries (200S) and at least a portion of the normal type of batteries (200N) may have different chemistries and thus may differ in at least one of energy output, energy efficiency and safety.

[0051] In at least a portion of the batteries of a special type (200S), at least a portion (FCP) of the periphery of a cross-sectional area (F) may be arranged adjacent to at least a portion (RCP) of the periphery of a specific region (R) corresponding to at least a portion (FCP) of the periphery of the cross-sectional area (F).

[0052] The normal type battery (200N) may be disposed on the remaining portion of the specific region (R) where the special type battery (200S) is not disposed.

[0053] The safety of at least a portion of the special type of batteries (200S) arranged at least a portion of the periphery (RCP) adjacent to a specific region (R) may be higher than the safety of at least a portion of the ordinary type of batteries (200N) arranged at least a portion of the periphery (RCP) not adjacent to the specific region (R).

[0054] According to another embodiment of the present invention, an electric vehicle includes a battery pack (10) and a wheel (20).

[0055] The base frame (100) may extend in a first direction and a second direction, and may be coupled to a wheel (20).

[0056] At least a portion of a periphery of one end portion of the specific region (R) in the first direction may correspond to at least a portion (RCP) of a periphery of the specific region (R).

[0057] Therefore, in at least a portion of the batteries of the special type (200S), at least a portion (FCP) of the periphery of the cross-sectional area (F) can be arranged adjacent to at least a portion (RCP) of the periphery of one end of a specific region (R) in the first direction, corresponding to at least a portion (FCP) of the periphery of the cross-sectional area (F).

[0058] One side of the base frame (100) in the first direction may be a front side of the vehicle.

[0059] The other side of the base frame (100) in the first direction may be the rear side of the vehicle.

[0060] Therefore, one end portion of the specific region (R) in the first direction may be located on the front side of the vehicle.

[0061] The one end portion of the specific region (R) in the first direction may include a specific segment (S) in the first direction, and a width of the specific segment (S) in the second direction gradually decreases toward one side in the first direction.

[0062] The periphery of the specific region (R) belonging to the specific section (S) may correspond to at least a portion (RCP) of the periphery of the specific region (R).

[0063] The electric vehicle may include a first motor (30A) and a second motor (30B), the first motor and the second motor being respectively arranged on one side and the other side in a first direction. The wheel (20) may include one or more first wheels (20A) and one or more second wheels (20B), the one or more first wheels being arranged on one side in the first direction and coupled to the first motor (30A), and the one or more second wheels being arranged on the other side in the first direction and coupled to the second motor (30B).

[0064] Among the special type of batteries (200S) arranged at least a portion of the periphery of the one end portion in the first direction adjacent to the specific area (R), at least a portion of the batteries (200) can be connected to the first motor (30A) to supply power to the first motor (30A).

[0065] At least a portion of the common type batteries (200N) disposed on the remaining portion of the specific area (R) where the special type batteries (200S) are not disposed can be connected to the second motor (30B) to supply power to the second motor (30B).

[0066] A special type of battery (200S) connected to the first motor (30A) and a normal type of battery (200N) connected to the second motor (30B) may differ in at least one of energy output, energy efficiency and safety.

[0067] A special type of battery (200S) connected to a first motor (30A) has higher energy efficiency and safety and lower output power than a normal type of battery (200N) connected to a second motor (30B).

[0068] Beneficial Effects

[0069] According to an embodiment of the present invention, a battery pack (10) may include a base frame (100) and a plurality of batteries (200). The base frame (100) may have a plate shape and have a specific area (R) on its upper surface. The plurality of batteries (200) may have a shape of a cross-sectional area (F) defined by the outermost contour of a cross section placed on the upper surface of the base frame (100). The plurality of batteries (200) may be arranged on the upper surface of the base frame (100) within the specific area (R). The plurality of batteries (200) may include a plurality of types of batteries (200N and 200S), the plurality of types of batteries including cross-sectional areas (F) having different shapes.

[0070] Therefore, the output power, capacity and service life of the battery pack (10) can be increased. In addition, even when the specific area (R) has various shapes or sizes, the energy density of the space within the specific area (R) can be increased. In addition, even when the specific area (R) is expanded into an arbitrary shape (a battery (200) of one type among multiple types cannot be arranged in the specific area (R) of the arbitrary shape), since other types of batteries (200) can be arranged in the expanded area, the battery pack (10) or the specific area (R) can be expanded as much as possible, thereby increasing the capacity of the battery pack (10).

[0071] According to an embodiment of the present invention, a specific region (R) may extend in a first direction and in a second direction perpendicular to the first direction. At least a portion (RCP) of the periphery of the specific region (R) may extend obliquely in a direction intersecting the first direction and the second direction. The cross-sectional area (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. Among the plurality of types of batteries (200), at least one type of battery (200) may be a special type of battery (200S). At least a portion (FCP) of the periphery of the cross-sectional area (F) of a special type of battery (200S) can extend obliquely along at least a portion (RCP) of the periphery of a specific region (R) in a direction intersecting the first direction and the second direction, and can be extended so that the angle difference between the extension direction of each segment of at least a portion (FCP) of the periphery of the cross-sectional area (F) and the extension direction of each segment of at least a portion (RCP) of the periphery of the specific region (R) corresponding to each segment of at least a portion (FCP) of the periphery of the cross-sectional area (F) is less than a specific angle.

[0072] Therefore, even when at least a portion (RCP) of the periphery of the specific region (R) extends obliquely in a direction intersecting the first direction or the second direction (at least a portion of the batteries (200) are arranged side by side in the specific region (R) in the first direction or the second direction), since a special type of battery (200S) having a shape corresponding to at least a portion (RCP) of the periphery of the specific region (R) can be arranged in the specific region (R), the energy density of the space in the specific region (R) can be increased. Therefore, the output power, capacity and service life of the battery pack (10) can be increased.

[0073] Furthermore, even when the specific region (R) has various shapes, the energy density of the space within the specific region (R) can be increased.

[0074] In addition, even when the specific area (R) is expanded to have a periphery extending obliquely in a direction intersecting the first direction and the second direction, since a special type of battery (200S) can be set in the expanded area, the battery pack (10) or the specific area (R) can be expanded as much as possible, thereby increasing the capacity of the battery pack (10).

[0075] According to an embodiment of the present invention, the plurality of types of batteries (200) may include at least one of a first type of battery (200A), a second type of battery (200B), a third type of battery (200C), and a fourth type of battery (200D). The first type of battery (200A), the second type of battery (200B), the third type of battery (200C), and the fourth type of battery (200D) may each correspond to a special type of battery (200S). The periphery of the cross-sectional area (F) of the first type of battery (200A) may include a first side (a), a second side (b), a third side (c) and a fourth side (d), the first side (a) extending in the first direction, the second side (b) and the third side (c) each extending from both ends of the first side (a) of the first type of battery (200A) to one side in the second direction by different lengths, and the fourth side (d) corresponds to at least a portion (FCP) of the periphery of the cross-sectional area (F) and connects one end of the second side (b) of the first type of battery (200A) in the second direction with one end of the third side (c) in the second direction. The periphery of the cross-sectional area (F) of the second type of battery (200B) may include a first side (a), a second side (b), a third side (c) and a fourth side (d), wherein the first side (a) extends in the first direction, the second side (b) and the third side (c) each extend different lengths from both ends of the first side (a) of the second type of battery (200B) to the other side in the second direction, and the fourth side (d) corresponds to at least a portion (FCP) of the periphery of the cross-sectional area (F) and connects the other end of the second side (b) of the second type of battery (200B) in the second direction with the other end of the third side (c) in the second direction. The periphery of the cross-sectional area (F) of the third type of battery (200C) may include a first side (a), a second side (b) and a third side (c), the first side (a) extending in the first direction, the second side (b) extending from one end or the other end of the first side (a) of the third type of battery (200C) in the first direction to one side in the second direction, and the third side (c) corresponding to at least a portion (FCP) of the periphery of the cross-sectional area (F) and connecting the other end or one end of the first side (a) of the third type of battery (200C) in the first direction with one end of the second side (b) of the third type of battery (200C) in the second direction.The periphery of the cross-sectional area (F) of the fourth type of battery (200D) may include a first side (a), a second side (b) and a third side (c), the first side (a) extending in the first direction, the second side (b) extending from one end or the other end of the first side (a) of the fourth type of battery (200D) in the first direction to the other side in the second direction, and the third side (c) corresponding to at least a portion (FCP) of the periphery of the cross-sectional area (F) and connecting the other end or one end of the first side (a) of the fourth type of battery (200D) in the first direction with the other end of the second side (b) of the fourth type of battery (200D) in the second direction.

[0076] Therefore, even when at least a portion (RCP) of the periphery of the specific 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 specific region (R) in the second direction, since the first / second / third / fourth type of batteries (200A, 200B, 200C, and 200D) having a shape corresponding to at least a portion (RCP) can be arranged in the specific region (R), the energy density of the space in the specific region (R) can also be increased. Therefore, the output power, capacity, and service life of the battery pack (10) can be increased.

[0077] In addition, even when one side or the other side of the specific region (R) in the second direction has various shapes extending obliquely in a direction intersecting the first direction or the second direction, the energy density of the space within the specific region (R) can be increased.

[0078] In addition, at least one edge of the periphery of the cross-sectional area (F) of the first / second / third / fourth type of battery (200A, 200B, 200C or 200D) can extend in the first direction or the second direction. Therefore, the first / second / third / fourth type of battery (200A, 200B, 200C and 200D) can be easily arranged side by side with the adjacent battery (200) in the second direction or the first direction, and even when subjected to external force in the first direction or the second direction, the first / second / third / fourth type of battery (200A, 200B, 200C and 200D) can be fixed to the base frame (100) along the second direction or the first direction perpendicular to the second direction, thereby improving structural stability. In addition, the empty space between the batteries (200) can be minimized, thereby improving the energy density of the space within the specific area (R).

[0079] According to an embodiment of the present invention, the plurality of types of batteries (200) may include at least one of a fifth type of battery (200E) and a sixth type of battery (200F). The fifth type of battery (200E) and the sixth type of battery (200F) may each correspond to a special type of battery (200S). The periphery of the cross-sectional area (F) of the fifth type of battery (200E) may include a first side (a), a second side (b), a third side (c) and a fourth side (d), the first side (a) and the second side (b) being arranged side by side in the first direction and extending in the second direction, the third side (c) corresponding to at least a portion (FCP) of the periphery of the cross-sectional area (F) and connecting one end of the first side (a) of the fifth type of battery (200E) in the second direction with one end of the second side (b) in the second direction, and the fourth side (d) corresponding to at least a portion (FCP) of the periphery of the cross-sectional area (F) and connecting the other end of the first side (a) of the fifth type of battery (200E) in the second direction with the other end of the second side (b) in the second direction. The periphery of the cross-sectional area (F) of the sixth type of battery (200F) may include a first side (a) and a second side (b), the first side (a) extending in the second direction, both ends of the second side (b) connected to both ends of the first side (a) of the sixth type of battery (200F), and protruding from the first side (a) of the sixth type of battery (200F) to one side or the other side in the first direction and corresponding to at least a portion (FCP) of the periphery of the cross-sectional area (F).

[0080] Therefore, for example, even when the specific region (R) includes a bell-shaped segment whose width in the second direction changes toward one end or the other end thereof in the first direction (for example, Figure 1 When the fifth / sixth type of battery (200E or 200F) having a shape corresponding to the segment (S) including the specific region (R) can be arranged in the specific region (R) corresponding to the segment (S), the energy density of the space in the specific region (R) can be increased. Therefore, the output power, capacity and service life of the battery pack (10) can be increased.

[0081] Furthermore, even when one side or the other side of the specific region (R) in the first direction has various shapes, the energy density of the space within the specific region (R) can be increased.

[0082] In addition, at least one edge of the periphery of the cross-sectional area (F) of the fifth / sixth type of battery (200E or 200F) can extend in the second direction. Therefore, the fifth / sixth type of battery (200E and 200F) can be easily arranged side by side with the adjacent battery (200) in the first direction, and even when subjected to external force in the first direction, the fifth / sixth type of battery (200E and 200F) can be fixed to the base frame (100) along the second direction perpendicular to the first direction, thereby improving structural stability. In addition, the empty space between the batteries (200) can be minimized, thereby improving the energy density of the space within the specific area (R).

[0083] According to an embodiment of the present invention, the plurality of types of batteries (200) may include a common type of battery (200N). The periphery of the cross-sectional area (F) of the common type of battery (200N) may include a first side (a), a second side (b), a third side (c) and a fourth side (d), wherein the first side (a) and the second side (b) are arranged side by side in the second direction and extend the same length in the first direction, and the third side (c) and the fourth side (d) are arranged side by side in the first direction, extend the same length in the second direction and respectively connect one end of the first side (a) of the common type of battery (200N) with one end of the second side (b) and the other end of the first side (a) with the other end of the second side (b).

[0084] Therefore, a common type of battery (200N) having a rectangular cross-sectional area and a common shape and a special type of battery (200S) having a trapezoidal or triangular cross-sectional area and a special shape can be arranged together in a specific area (R). Without considering the shape of the periphery of the specific area (R), the common type of battery (200N) can generally be arranged in a specific area (R) having various shapes, and the common type of battery (200N) can have a simple structure, so its manufacturing cost can be lower than the manufacturing cost of the special type of battery (200S). Therefore, since the common type of battery (200N) and the special type of battery (200S) are arranged together in the specific area (R), the manufacturing cost of the battery pack (10) can be reduced.

[0085] In addition, the periphery of the cross-sectional area (F) of the common type battery (200N) can extend in the first direction and the second direction. Therefore, the common type battery (200N) can be easily arranged side by side with the adjacent first / second / third / fourth / fifth / sixth type batteries (200A, 200B, 200C, 200D, 200E and 200F) in the first direction or the second direction, and even when subjected to external forces in the first direction or the second direction, the common type battery (200N) can be fixed to the base frame (100) along the second direction or the first direction perpendicular to the second direction, thereby improving the structural stability. In addition, the empty space between the common type battery (200N) and the first / second / third / fourth / fifth / sixth type batteries (200A, 200B, 200C, 200D, 200E and 200F) can be minimized, thereby improving the energy density of the space within the specific area (R).

[0086] According to an embodiment of the present invention, at least a portion of two or more types of batteries (200) among the multiple types may have different chemical properties according to their respective types, and thus may differ in at least one of energy output, energy efficiency and safety.

[0087] Therefore, the characteristics of the battery (200) can be changed according to the shape of the battery (200) set in a specific area (R). Therefore, the energy density of the battery pack (10) can be improved, and the structure, arrangement, configuration or performance of the battery pack (10) can be optimized and improved according to the purpose or environment. In addition, batteries (200) with different chemical characteristics can be easily distinguished based on the shape of the battery (200) (e.g., the shape of the cross-sectional area).

[0088] According to an embodiment of the present invention, the specific region (R) may extend in a first direction and in a second direction perpendicular to the first direction. At least a portion (RCP) of the periphery of the specific region (R) may extend obliquely in a direction intersecting the first direction and the second direction. The cross-sectional area (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 common types of batteries (200N) and one or more special types of batteries (200S). The periphery of the cross-sectional area (F) of a common type of battery (200N) may include a first side (a), a second side (b), a third side (c) and a fourth side (d), wherein the first side (a) and the second side (b) are arranged side by side in the second direction and extend the same length in the first direction, and the third side (c) and the fourth side (d) are arranged side by side in the first direction, extend the same length in the second direction and respectively connect one end of the first side (a) with one end of the second side (b) and the other end of the first side (a) with the other end of the second side (b). At least a portion (FCP) of the periphery of the cross-sectional area (F) of the special type of battery (200S) may extend obliquely in a direction intersecting the first direction and the second direction along at least a portion (RCP) of the periphery of the specific region (R), and may extend so that the angle difference between the extension direction of each segment of at least a portion (FCP) of the periphery of the cross-sectional area (F) and the extension direction of each segment of at least a portion (RCP) of the periphery of the specific region (R) corresponding to each segment of at least a portion (FCP) of the periphery of the cross-sectional area (F) is less than a specific angle. At least a portion of the batteries of the special type (200S) and at least a portion of the batteries of the general type (200N) may have different chemical properties and therefore may differ in at least one of energy output, energy efficiency and safety.

[0089] Therefore, the characteristics of the battery (200) can be changed according to the shape of the battery (200) set in the specific area (R). Therefore, the energy density of the battery pack (10) can be improved, and the structure, arrangement, configuration or performance of the battery pack (10) can be optimized and improved according to the purpose or environment. In addition, batteries (200) with different chemical characteristics can be easily distinguished according to the shape of the battery (200) (for example, the shape of the cross-sectional area).

[0090] According to an embodiment of the present invention, in at least a portion of the batteries of the special type (200S), at least a portion (FCP) of the periphery of the cross-sectional area (F) may be disposed adjacent to at least a portion (RCP) of the periphery of the specific region (R) corresponding to at least a portion (FCP) of the periphery of the cross-sectional area (F). The batteries of the normal type (200N) may be disposed on the remaining portion of the specific region (R) where the batteries of the special type (200S) are not disposed. The safety of at least a portion of the batteries (200) of the special type (200S) disposed adjacent to at least a portion (RCP) of the periphery of the specific region (R) may be higher than the safety of at least a portion of the batteries (200) of the normal type (200N) disposed not adjacent to at least a portion (RCP) of the periphery of the specific region (R).

[0091] Therefore, since the special type of battery (200S) is arranged near the periphery of the specific area (R) and the ordinary type of battery (200N) is arranged on the remaining part, the number of ordinary type of batteries (200N) is increased, the structure of the battery pack (10) is simplified, thereby reducing the manufacturing cost and maintenance cost of the battery pack (10), and facilitating the manufacturing and maintenance of the battery pack (10).

[0092] In addition, the safety of a battery (a special type of battery) that can be arranged adjacent to the periphery of a specific area (R) and therefore may be subjected to a larger impact from the outside can be higher than the safety of a battery (a normal type of battery) that is not arranged adjacent to the periphery of the specific area (R) and therefore may not be subjected to a larger impact from the outside, thereby effectively improving the safety of the battery pack (10) at a low cost.

[0093] In addition, the safety of a special type of battery (200S) that can be structurally variable and can have a large area facing the outside of the battery pack (10) because it includes at least a portion of the periphery (RCP) along a specific region R that extends obliquely in a direction intersecting the first direction and the second direction can be higher than the safety of a common type of battery (200N) that can be structurally stable and can have a small area facing the outside of the battery pack (10) because it does not include a portion extending obliquely in a direction intersecting the first direction and the second direction, thereby effectively improving the safety of the battery pack (10) at a low cost.

[0094] According to an embodiment of the present invention, an electric vehicle may include a battery pack (10) and a wheel (20). The base frame (100) may extend in a first direction and a second direction and may be coupled to the wheel (20). At least a portion (RCP) of a periphery of a specific region (R) of the battery pack (10) at one end in the first direction may correspond to at least a portion (RCP) of a periphery of the specific region (R). Therefore, in at least a portion of the batteries of a special type (200S), at least a portion (FCP) of a periphery of a cross-sectional area (F) may be disposed adjacent to at least a portion of a periphery of an end in the first direction of the specific region (R) corresponding to at least a portion (FCP) of a periphery of the cross-sectional area (F).

[0095] Therefore, the safety of a battery (a special type of battery) that can be arranged adjacent to at least a portion of the periphery (RCP) of one end portion of a specific region (R) in the first direction and thus may be subjected to a larger impact from the outside can be higher than the safety of a battery (a normal type of battery) that is arranged adjacent to at least a portion of the periphery (RCP) of one end portion of a specific region (R) in the first direction and thus may not be subjected to a larger impact from the outside, thereby effectively improving the safety of a battery pack (10) installed in an electric vehicle (1) at a low cost.

[0096] In addition, the safety of a special type of battery (200S) that can be structurally variable and has a large area facing the outside of the battery pack (10) because at least a portion of the periphery (RCP) of an end portion along a specific region R in the first direction extends obliquely in a direction intersecting the first direction and the second direction can be higher than the safety of a normal type of battery (200N) that can be structurally stable and has a small area facing the outside of the battery pack (10) because it does not include a portion extending obliquely in a direction intersecting the first direction and the second direction. Therefore, the safety of the battery pack (10) installed in the electric vehicle (1) can be effectively improved at a low cost.

[0097] According to an embodiment of the present invention, one side of the base frame (100) in the first direction may be the front side of the vehicle. The other side of the base frame (100) in the first direction may be the rear side of the vehicle. Therefore, one end of the specific area (R) in the first direction may be located at the front side of the vehicle.

[0098] Therefore, the safety of a battery (a special type of battery) that can be arranged on the front side of a vehicle and thus may be subjected to a greater impact during a vehicle collision can be higher than the safety of other batteries (e.g., a common type of battery) that may not be subjected to a greater impact during a vehicle collision, thereby effectively improving the safety of a battery pack (10) installed in an electric vehicle (1) at a low cost.

[0099] According to an embodiment of the present invention, one end of the specific region (R) in the first direction may include a specific segment (S) in the first direction, and the width of the specific segment (S) in the second direction gradually decreases toward one side in the first direction. The periphery of the specific region (R) belonging to the specific segment (S) may correspond to at least a portion (RCP) of the periphery of the specific region (R).

[0100] Therefore, even when the front side of the specific region (R) includes the specific section (S) to form a bell shape, the special type of battery (200S) with high safety can be arranged adjacent to the periphery of the specific region (R) belonging to the specific section (S). Therefore, for example, even when the front side of the electric vehicle (1) is streamlined to reduce air resistance and thus the front side of the specific region (R) forms a bell shape, the safety of the battery pack (10) installed in the electric vehicle (1) can be effectively improved at a low cost.

[0101] According to an embodiment of the present invention, an electric vehicle may include a first motor (30A) and a second motor (30B) respectively arranged on one side and the other side in a first direction. The wheel (20) may include one or more first wheels (20A) and one or more second wheels (20B), one or more first wheels (20A) being arranged on one side in the first direction and coupled to the first motor (30A), and one or more second wheels (20B) being arranged on the other side in the first direction and coupled to the second motor (30B). In a special type of battery (200S) arranged at least a portion of the periphery of one end of a specific region (R) in the first direction, at least a portion of the batteries (200) may be connected to the first motor (30A) to supply power to the first motor (30A). At least a portion of the batteries (200) among the ordinary type of batteries (200N) arranged on the remaining portion of the specific region (R) where the special type of battery (200S) is not arranged are connected to the second motor (30B) to supply power to the second motor (30B). A special type of battery (200S) connected to the first motor (30A) and a normal type of battery (200N) connected to the second motor (30B) may differ in at least one of energy output, energy efficiency and safety.

[0102] Therefore, according to the driving environment or driving conditions, the motor (30) connected to the battery (200) having characteristics corresponding to the driving environment or driving conditions can be easily driven at low cost with a simple configuration. Therefore, the energy efficiency, safety, output, etc. of the electric vehicle can be optimized and improved according to the driving environment or driving conditions.

[0103] In addition, since the first motor / second motor (30A and 30B) and the special type battery / ordinary type battery (200S and 200N) connected to the first motor / second motor (30A and 30B) are positioned close to each other, wiring is easy, which reduces manufacturing cost and maintenance cost.

[0104] According to an embodiment of the present invention, a special type of battery (200S) connected to a first motor (30A) and a special type of battery (200S) connected to a second motor (30B) have higher energy efficiency and safety and lower output power than a normal type of battery (200N).

[0105] Therefore, in a driving environment or driving condition requiring high energy efficiency and high safety, a first motor (30A) connected to a special type of battery (200S) having characteristics that conform to the driving environment or driving condition can be driven. On the other hand, in a driving environment or driving condition requiring high output power, a second motor (30B) connected to a normal type of battery (200N) having characteristics that conform to the driving environment or driving condition can be driven. Therefore, the energy efficiency, safety, output, etc. of the electric vehicle can be optimized and improved according to the driving environment or driving conditions.

[0106] In addition to the above-mentioned effects, specific effects of the present invention will be described together with the following specific embodiments for implementing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0107] Figure 1 is a schematic diagram showing a part of components of an electric vehicle including a battery pack according to one embodiment of the present invention, and is a plan view showing a state in which a battery is removed from the battery pack.

[0108] Figure 2 It shows Figure 1 1 is a schematic diagram of a state in which batteries are installed in a battery pack, and is a plan view showing an electric vehicle including a battery pack according to a first embodiment.

[0109] Figure 3 It shows Figure 1 2 is a schematic diagram of a state in which batteries are installed in a battery pack, and is a plan view showing an electric vehicle including a battery pack according to a second embodiment.

[0110] Figure 4 It shows Figure 1 1 is a schematic diagram of a state in which batteries are installed in a battery pack, and is a plan view showing an electric vehicle including a battery pack according to a third embodiment.

[0111] [Explanation of Reference Numerals]

[0112] 1. Electric vehicles

[0113] 10: Battery module 20: Wheel

[0114] 20A: First wheel 20B: Second wheel

[0115] 30: Motor 30A: First motor

[0116] 30B: Second motor

[0117] 100: Base frame R: Specific area

[0118] 200: Battery F: Section area

[0119] 200A: First type of battery 200B: Second type of battery

[0120] 200C: The third type of battery 200D: The fourth type of battery

[0121] 200E: The fifth type of battery 200F: The sixth type of battery

[0122] 200N: Normal type of battery 200S: Special type of battery DETAILED DESCRIPTION

[0123] The above objects, features and advantages will be described in detail below with reference to the accompanying drawings, so that a person of ordinary skill in the technical field to which the present invention belongs will be able to easily implement the technical ideas of the present invention. When describing the present invention, if it is determined that a detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals are used to represent the same or similar parts.

[0124] Although "first" and "second" etc. can be used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another component, and unless otherwise specified, the first component can of course be the second component.

[0125] Throughout the specification, unless otherwise specified, each component may be in the singular or in the plural.

[0126] Hereinafter, any component being arranged "on (or below)" or "above (or below)" a component means that the arbitrary component is placed in contact with the upper surface (or lower surface) of the component. In addition, it may mean that other components may be interposed between the component and any component arranged on (or below) the component.

[0127] In addition, when a component is described as being “linked,” “coupled” or “connected” to another component, the components may be directly connected or connected to each other, but other components may be “interposed” between the components, or the components may be “linked,” “coupled” or “connected” through other components.

[0128] Unless the context clearly dictates otherwise, singular expressions used herein include plural expressions. In the present application, terms such as "consisting of" or "comprising" should not be interpreted as necessarily including all the various components or steps described in the specification. It should be interpreted that it may not include some of these components or some of these steps, or may further include additional components or steps.

[0129] In addition, unless the context clearly stipulates otherwise, the singular expressions used herein include plural expressions. In the present application, terms such as "consisting of" or "comprising" should not be interpreted as necessarily including all the various components or steps described in the specification. It should be interpreted that it may not include some of these components or some of these steps, or may further include additional components or steps.

[0130] Figure 1 is a schematic diagram showing a part of components of an electric vehicle including a battery pack according to one embodiment of the present invention, and is a plan view showing a state in which a battery is removed from the battery pack. Figure 2 It shows Figure 1 1 is a schematic diagram of a state in which batteries are installed in a battery pack, and is a plan view showing an electric vehicle including a battery pack according to a first embodiment. Figure 3 It shows Figure 1 2 is a schematic diagram of a state in which batteries are installed in a battery pack, and is a plan view showing an electric vehicle including a battery pack according to a second embodiment. Figure 4 It shows Figure 1 1 is a schematic diagram of a state in which batteries are installed in a battery pack, and is a plan view showing an electric vehicle including a battery pack according to a third embodiment.

[0131] [Battery Pack]

[0132] Reference Figures 1 to 4 , a battery pack 10 according to one embodiment may include a base frame 100 and a plurality of batteries 200 .

[0133] The base frame 100 may have a plate shape.

[0134] The base frame 100 may have a certain region R on the upper surface.

[0135] The specific 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.

[0136] At least a portion RCP of the periphery of the specific region R may extend obliquely in a direction intersecting the first direction and the second direction.

[0137] A plurality of batteries 200 may be disposed within a specific region R on an upper surface of the base frame 100 .

[0138] Here, the battery 200 may be a battery module, but the present invention is not limited thereto.

[0139] The plurality of batteries 200 may have a shape of a cross-sectional area F defined by an outermost contour of a cross section disposed parallel to an upper surface of the base frame 100 .

[0140] The plurality of batteries 200 may include a plurality of types of batteries 200N and 200S, and the cross-sectional areas F of the plurality of types of batteries have different shapes.

[0141] In various types of batteries 200 , the area of ​​the cross-sectional region F may be smaller than the area of ​​the specific region R.

[0142] When a plurality of batteries 200 (that is, a plurality of types of batteries 200 having cross-sectional areas F of different shapes) are arranged in the specific region R, the energy density of the space in the specific region R can be increased, compared to a case where one or more batteries 200 corresponding to any one type among a plurality of types are arranged in the specific region R. That is, the maximum value of the sum of the areas of the shapes of the cross-sectional areas F of the plurality of batteries 200 in a state where the plurality of batteries 200 arranged with the batteries 200N and 200S of the plurality of types are arranged in the specific region R can be greater than the maximum value of the sum of the areas of the shapes of the cross-sectional areas of the plurality of batteries 200 in a state where the plurality of batteries 200 arranged with the batteries 200N of a single type are arranged in the specific region R.

[0143] For example, Figure 3 As shown, even when a single type of ordinary type batteries 200N having a cross-sectional area F in a rectangular shape are arranged in rows and columns as much as possible in the first direction and the second direction within the specific region R, a space in which the ordinary type batteries 200N cannot be arranged may be vacated within the specific region R. A special type battery 200S having a different cross-sectional area F from the ordinary type battery 200N and being mountable in such an empty space is arranged in the empty space, thereby improving the energy density of the space within the specific region R.

[0144] Therefore, it is possible to increase the output power, capacity, and service life of the battery pack 10. In addition, even when the specific region R has various shapes or sizes, the energy density of the space within the specific region R can be increased. In addition, even when the specific region R is expanded into an arbitrary shape (any type of battery 200 among multiple types cannot be arranged in the specific region R of the arbitrary shape), since other types of batteries 200 can be arranged in the expanded area, the battery pack 10 or the specific region R can be expanded as much as possible, thereby increasing the capacity of the battery pack 10.

[0145] The cross-sectional area F of the plurality of batteries 200 may extend in the first direction and the second direction.

[0146] At least a portion of the plurality of batteries 200 may be arranged side by side in the first direction or the second direction.

[0147] Among the plurality of types of batteries 200 , at least one type of battery 200 may be a special type of battery 200S.

[0148] The special type of battery 200S may be a battery 200 in which at least a portion FCP of the periphery of the cross-sectional area F extends obliquely along at least a portion RCP of the periphery of the specific region R in a direction intersecting the first direction and the second direction.

[0149] In this case, at least a portion FCP of the periphery of the cross-sectional area F of the special type battery 200S may form a straight line or a curved line.

[0150] Furthermore, at least a portion FCP of the periphery of the cross-sectional area F of the special type of battery 200S may not completely correspond to at least a portion RCP of the periphery of the specific region R.

[0151] For example, the angle difference between the extension direction of each segment of at least a portion FCP of the periphery of the cross-sectional area F of the special type of battery 200S and the extension direction of each segment corresponding to each segment (each segment of the at least a portion of the periphery of the cross-sectional area of ​​the special type of battery) of at least a portion RCP of the periphery of the specific region R may be less than a specific angle. Here, for example, the specific angle may be 30 degrees.

[0152] Therefore, even when at least a portion RCP of the periphery of the specific region R extends obliquely in a direction intersecting the first direction or the second direction (at least a portion of the batteries 200 are arranged side by side in the specific region R in the first direction or the second direction), since a special type of battery 200S having a shape corresponding to at least a portion RCP of the periphery of the specific region R can be arranged in the specific region R, the energy density of the space in the specific region R can be increased. Therefore, the output power, capacity, and service life of the battery pack 10 can be increased.

[0153] Furthermore, even when the specific region R has various shapes, the energy density of the space within the specific region R can be increased.

[0154] In addition, even when the specific area R is expanded to have a periphery extending obliquely in a direction intersecting the first direction and the second direction, since a special type of battery 200S can be set in the expanded area, the battery pack 10 or the specific area R can be expanded as much as possible, thereby increasing the capacity of the battery pack 10.

[0155] The plurality of types of batteries 200 may include at least one of a first type of battery 200A, a second type of battery 200B, a third type of battery 200C, and a fourth type of battery 200D.

[0156] The first type battery 200A, the second type battery 200B, the third type battery 200C, and the fourth type battery 200D may each correspond to a specific type battery 200S. This will be described in detail as follows.

[0157] The periphery of the cross-sectional area F of the first type battery 200A may include a first side a, a second side b, a third side c, and a fourth side d, the first side a extending in the first direction, the second side b and the third side c each extending from both ends of the first side a of the first type battery 200A to one side in the second direction (e.g., the left side) by different lengths, and the fourth side d corresponds to at least a portion FCP of the periphery of the cross-sectional area F and connects one end (e.g., the left end) of the second side b of the first type battery 200A in the second direction with one end (e.g., the left end) of the third side c in the second direction (see Figure 2 ).

[0158] The periphery of the cross-sectional area F of the second type of battery 200B may include a first side a, a second side b, a third side c, and a fourth side d, the first side a extending in the first direction, the second side b and the third side c each extending from both ends of the first side a of the second type of battery 200B to the other side (e.g., the right side) in the second direction by different lengths, and the fourth side d corresponding to at least a portion FCP of the periphery of the cross-sectional area F and connecting the other end (e.g., the right end) of the second side b of the second type of battery 200B in the second direction with the other end (e.g., the right end) of the third side c in the second direction (see Figure 2 ).

[0159] The fourth side d of the first type battery 200A and the second type battery 200B corresponding to at least a portion FCP of the periphery of the cross-sectional area F may be as follows: Figure 2 The straight line shown may be Figure 2 The straight lines shown are different curves.

[0160] The periphery of the cross-sectional area F of the third type of battery 200C may include a first side a, a second side b, and a third side c, the first side a extending in the first direction, the 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 of battery 200C in the first direction to one side (e.g., the left side) in the second direction, and the third side c corresponding to at least a portion FCP of the periphery of the cross-sectional area F and connecting the other end or one end of the first side a of the third type of battery 200C in the first direction with one end of the second side b of the third type of battery 200C in the second direction (see Figure 3 ).

[0161] The periphery of the cross-sectional area F of the fourth type of battery 200D may include a first side a, a second side b, and a third side c, the first side a extending in the first direction, the second side b extending from one end or the other end of the first side a of the fourth type of battery 200D in the first direction to the other side in the second direction, and the third side c corresponding to at least a portion FCP of the periphery of the cross-sectional area F and connecting the other end or one end of the first side a of the fourth type of battery 200D in the first direction with the other end of the second side b of the fourth type of battery 200D in the second direction (see Figure 3 ).

[0162] The third side d of the third type battery 200C and the fourth type battery 200D corresponding to at least a portion FCP of the periphery of the cross-sectional area F may be as follows: Figure 3 The straight line shown, or it can be Figure 4 The curve shown.

[0163] Therefore, even when at least a portion of the RCP extending obliquely in the direction intersecting the first direction or the second direction of the periphery of the specific region R is formed on one side or the other side of the specific region R in the second direction, the first / second / third /

[0164] The fourth type of batteries 200A, 200B, 200C, and 200D may be disposed in the specific region R, so it is also possible to increase the energy density of the space in the specific region R. Therefore, the output power, capacity, and life span of the battery pack 10 may be increased.

[0165] Furthermore, even when one side or the other side of the specific region R in the second direction has various shapes extending obliquely in a direction intersecting the first direction or the second direction, the energy density of the space within the specific region R can be increased.

[0166] In addition, at least one edge of the periphery of the cross-sectional area F of the first / second / third / fourth type battery 200A, 200B, 200C or 200D may extend in the first direction or the second direction. Therefore, the first / second / third / fourth type battery 200A, 200B, 200C and 200D can be easily arranged side by side with the adjacent battery 200 in the second direction or the first direction, and even when subjected to external force in the first direction or the second direction, the first / second / third / fourth type battery 200A, 200B, 200C and 200D can be fixed to the base frame 100 along the second direction or the first direction perpendicular to the second direction, which can improve structural stability. In addition, the empty space between the batteries 200 can be minimized, thereby improving the energy density of the space within the specific area R.

[0167] The plurality of types of batteries 200 may include at least one of a fifth type of battery 200E and a sixth type of battery 200F.

[0168] The fifth type of battery 200E and the sixth type of battery 200F may correspond to the special type of battery 200S. This will now be described in detail.

[0169] The periphery of the cross-sectional area F of the fifth type of battery 200E may include a first side a, a second side b, a third side c, and a fourth side d, the first side a and the second side b are arranged side by side in the first direction and extend in the second direction, the third side c corresponds to at least a portion FCP of the periphery of the cross-sectional area F and connects one end of the first side a of the fifth type of battery 200E in the second direction with one end of the second side b in the second direction, and the fourth side d corresponds to at least a portion FCP of the periphery of the cross-sectional area F and connects the other end of the first side a of the fifth type of battery 200E in the second direction with the other end of the second side b in the second direction (see Figure 2 ).

[0170] The third side c and the fourth side d of the fifth type battery 200E corresponding to at least a portion FCP of the periphery of the cross-sectional area F may be as follows: Figure 2 The straight line shown may be Figure 2 The different curves are shown.

[0171] The periphery of the cross-sectional area F of the sixth type of battery 200F may include a first side a and a second side b, the first side a extending in the second direction, both ends of the second side b connected to both ends of the first side a of the sixth type of battery 200F, and the second side b protrudes from the first side a of the sixth type of battery 200F to one side or the other side in the first direction and corresponds to at least a portion FCP of the periphery of the cross-sectional area F (see Figure 4 ).

[0172] The second side b of the sixth type of battery 200F corresponding to at least a portion FCP of the periphery of the cross-sectional area F may be as follows: Figure 4 The curve shown may have Figure 4 The curves shown are different curves or a combination of straight lines and curves.

[0173] Therefore, for example, even when the specific region R includes a bell-shaped segment whose width in the second direction changes toward one end or the other end thereof in the first direction (for example, Figure 1 When the fifth / sixth type battery 200E or 200F having a shape corresponding to the segment S including the specific region R can be disposed in the specific region R corresponding to the segment S, the energy density of the space in the specific region R can be increased. Therefore, the output power, capacity, and service life of the battery pack 10 can be increased.

[0174] Furthermore, even when one side or the other side of the specific region R in the first direction has various shapes, the energy density of the space within the specific region R can be increased.

[0175] In addition, at least one side of the periphery of the cross-sectional area F of the fifth / sixth type battery 200E or 200F may extend in the second direction. Therefore, the fifth / sixth type battery 200E and 200F can be easily arranged side by side with the adjacent battery 200 in the first direction, and even when subjected to external force in the first direction, the fifth / sixth type battery 200E and 200F can be fixed to the base frame 100 in the second direction perpendicular to the first direction, and the structural stability can be improved. In addition, the empty space between the batteries 200 can be minimized, thereby improving the energy density of the space within the specific area R.

[0176] Meanwhile, as shown in the drawings, the first direction and the second direction for implementing the first / second / third / fourth / fifth / sixth type of batteries 200A, 200B, 200C, 200D, 200E, and 200F may correspond to the front-rear direction and the left-right direction of the electric vehicle 1, respectively. However, the present invention is not limited to this configuration. For example, unlike the directions shown in the drawings, 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.

[0177] The plurality of types of batteries 200 may include a general type of battery 200N in addition to the special type of battery 200S.

[0178] The periphery of the cross-sectional area F of the common type battery 200N may include a first side a, a second side b, a third side c and a fourth side d, the first side a and the second side b being arranged side by side in the second direction and extending the same length in the first direction, the third side c and the fourth side d being arranged side by side in the first direction, extending the same length in the second direction and respectively connecting one end of the first side a with one end of the second side b and the other end of the first side a with the other end of the second side b of the common type battery 200N.

[0179] Therefore, a general type battery 200N having a rectangular cross-sectional area and a general shape and a special type battery 200S having a trapezoidal or triangular cross-sectional area and a special shape can be arranged together in the specific region R. Without considering the shape of the periphery of the specific region R, the general type battery 200N can be generally arranged in the specific region R having various shapes, and the general type battery 200N can have a simple structure, so that its manufacturing cost can be lower than the manufacturing cost of the special type battery 200S. Therefore, since the general type battery 200N and the special type battery 200S are arranged together in the specific region R, the manufacturing cost of the battery pack 10 can be reduced.

[0180] In addition, the periphery of the cross-sectional area F of the common type battery 200N can extend in the first direction and the second direction. Therefore, the common type battery 200N can be easily arranged side by side with the adjacent first / second / third / fourth / fifth / sixth type batteries 200A, 200B, 200C, 200D, 200E and 200F in the first direction or the second direction, and even when subjected to external force in the first direction or the second direction, the common type battery 200N can be fixed to the base frame 100 along the second direction or the first direction perpendicular to the second direction, and the structural stability can be improved. In addition, the empty space between the common type battery 200N and the first / second / third / fourth / fifth / sixth type batteries 200A, 200B, 200C, 200D, 200E and 200F can be minimized, thereby improving the energy density of the space within the specific area R.

[0181] At least a portion of the batteries 200 of two or more types among the plurality of types may have different chemical properties according to their respective types, and thus may differ in at least one of energy output, energy efficiency, and safety. Here, for example, the chemical properties may include the type of active material and the rate or amount of chemical reaction, etc. However, the present invention is not limited thereto.

[0182] Specifically, for example, at least a portion of the special type of battery 200S and at least a portion of the normal type of battery 200N may have different chemical properties and may therefore differ in at least one of energy output, energy efficiency, and safety. In addition, even if the first / second / third / fourth / fifth / sixth type of battery 200A, 200B, 200C, 200D, 200E, and 200F corresponds to the special type of battery 200S, different types of first / second / third / fourth / fifth / sixth type of battery 200A, 200B, 200C, 200D, 200E, and 200F may also have different chemical properties and may therefore differ in at least one of energy output, energy efficiency, and safety.

[0183] Therefore, the characteristics of the battery 200 may vary depending on the shape of the battery 200 disposed in the specific region R. Therefore, the energy density of the battery pack 10 may be increased, while the structure, arrangement, configuration, or performance of the battery pack 10 may be optimized and improved according to the purpose 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 area).

[0184] In at least a portion of the special type of batteries 200S, at least a portion of the FCP of the periphery of the cross-sectional area F may be disposed adjacent to at least a portion of the RCP of the periphery of the specific region R corresponding to at least a portion of the FCP of the periphery of the cross-sectional area F. However, the present invention is not limited to this configuration.

[0185] The normal type battery 200N may be disposed on the remaining portion of the specific region R where the special type battery 200S is not disposed.

[0186] The safety of at least a portion of the batteries 200 among the special type of batteries 200S set at at least a portion of the RCP of the periphery adjacent to the specific region R may be higher than the safety of at least a portion of the batteries 200 among the ordinary type of batteries 200N set at at least a portion of the RCP of the periphery not adjacent to the specific region R.

[0187] Therefore, since the special type of battery 200S is arranged adjacent to the periphery of the specific area R and the ordinary type of battery 200N is arranged on the remaining part, the number of ordinary type batteries 200N is increased and the structure of the battery pack 10 is simplified, thereby reducing the manufacturing cost and maintenance cost of the battery pack 10 and facilitating the manufacturing and maintenance of the battery pack 10.

[0188] In addition, the safety of a battery (a special type of battery) that can be set adjacent to the periphery of the specific area R and therefore may be subjected to a larger impact from the outside can be higher than the safety of a battery (an ordinary type of battery) that is not set adjacent to the periphery of the specific area R and therefore may not be subjected to a larger impact from the outside, thereby effectively improving the safety of the battery pack 10 at a low cost.

[0189] In addition, the safety of the special type of battery 200S, which can be structurally variable and have a large area facing the outside of the battery pack 10 because at least a portion of the RCP along the periphery of the specific region R extends obliquely in a direction intersecting the first direction and the second direction, can be higher than the safety of the ordinary type of battery 200N, which can be structurally stable and have a small area facing the outside of the battery pack 10 because it does not include a portion extending obliquely in a direction intersecting the first direction and the second direction. Therefore, the safety of the battery pack 10 can be effectively improved at a low cost.

[0190] [Electric Vehicles]

[0191] The electric vehicle 1 according to one embodiment may include a battery pack 10 and a wheel 20. The electric vehicle 1 may include a motor 30.

[0192] The battery pack 10 is as described above. Hereinafter, a case where the battery pack 10 is used in the electric vehicle 1 will be described.

[0193] The base frame 100 of the battery pack 10 may extend in the first direction and the second direction.

[0194] At least a portion RCP of a periphery of one end portion of the specific region R of the battery pack 10 in the first direction may correspond to at least a portion RCP of a periphery of the specific region R.

[0195] Therefore, in at least a portion of the batteries of the special type 200S, at least a portion FCP of the periphery of the cross-sectional area F can be arranged adjacent to at least a portion RCP of the periphery of one end of the specific region R in the first direction, corresponding to at least a portion FCP of the periphery of the cross-sectional area F.

[0196] In this case, the safety of at least a portion of the batteries 200 among the special type of batteries 200S in which the RCP of at least a portion of the periphery of one end portion adjacent to the specific region R in the first direction is set can be higher than the safety of at least a portion of the batteries 200 among the ordinary type of batteries 200N in which the RCP of at least a portion of the periphery of one end portion adjacent to the specific region R in the first direction is set.

[0197] Therefore, the safety of a battery (a special type of battery) that can be arranged with an RCP adjacent to at least a portion of the periphery of one end of the specific region R in the first direction and thus may be subjected to a larger impact from the outside can be higher than the safety of a battery (a normal type of battery) that is not arranged with an RCP adjacent to at least a portion of the periphery of one end of the specific region R in the first direction and thus may not be subjected to a larger impact from the outside, thereby effectively improving the safety of the battery pack 10 installed in the electric vehicle 1 at a low cost.

[0198] In addition, the safety of the special type of battery 200S, which can be structurally variable and have a large area facing the outside of the battery pack 10 because at least a portion of the RCP along the periphery of one end of the specific region R in the first direction extends obliquely in a direction intersecting the first direction and the second direction, can be higher than the safety of the ordinary type of battery 200N, which can be structurally stable and have a small area facing the outside of the battery pack 10 because it does not include a portion extending obliquely in a direction intersecting the first direction and the second direction. Therefore, the safety of the battery pack 10 installed in the electric vehicle 1 can be effectively improved at a low cost.

[0199] In this case, one side of the base frame 100 in the first direction may be the front side of the vehicle, and the other side of the base frame 100 in the first direction may be the rear side of the vehicle. Therefore, one end of the specific region R in the first direction may be the front side of the vehicle.

[0200] Therefore, the safety of a battery (a special type of battery) that can be arranged on the front side of the vehicle and therefore may be subjected to a greater impact during a vehicle collision can be higher than the safety of other batteries (for example, an ordinary type of battery) that may not be subjected to a greater impact during a vehicle collision, thereby effectively improving the safety of the battery pack 10 installed in the electric vehicle 1 at a low cost.

[0201] One end portion of the specific region R in the first direction may include a specific segment S in the first direction, and a width of the specific segment in the second direction gradually decreases toward one side in the first direction.

[0202] The periphery of the specific region R belonging to the specific segment S may correspond to at least a portion RCP of the periphery of the specific region R. As shown in FIG.

[0203] Therefore, even when the front side of the specific region R includes the specific section S to form a bell shape, the special type of battery 200S having high safety can be disposed adjacent to the periphery of the specific region R belonging to the specific section S. Therefore, for example, even when the front side of the electric vehicle 1 is streamlined to reduce air resistance and thus the front side of the specific region R forms a bell shape, the safety of the battery pack 10 mounted in the electric vehicle 1 can be effectively improved at a low cost.

[0204] The wheels 20 may be coupled to the base frame 100 of the battery pack 10 .

[0205] The wheels 20 may include one or more first wheels 20A and one or more second wheels 20B, wherein the one or more first wheels are disposed on one side of the electric vehicle 1 in the first direction and the one or more second wheels are disposed on the other side of the electric vehicle 1 in the first direction.

[0206] The electric vehicle 1 may be provided with a first motor 30A and a second motor 30B at one side and the other side in the first direction, respectively.

[0207] The first electric machine 30A may be coupled to one or more first wheels 20A.

[0208] The second electric machine 30B may be coupled to one or more second wheels 20B.

[0209] Among the special type batteries 200S disposed adjacent to at least a portion of the periphery of one end of the specific region R in the first direction, at least a portion of the batteries 200 may be connected to the first motor 30A to supply power to the first motor 30A.

[0210] At least a portion of the batteries 200 among the general type batteries 200N disposed on the remaining portion of the specific region R where the special type batteries 200S are not disposed is connected to the second motor 30B to supply power to the second motor 30B.

[0211] The special type battery 200S connected to the first motor 30A and the general type battery 200N connected to the second motor 30B may differ in at least one of energy output, energy efficiency, and safety.

[0212] Therefore, the motor 30 connected to the battery 200 having characteristics corresponding to the driving environment or driving conditions can be easily driven at low cost with a simple configuration according to the driving environment or driving conditions. Therefore, the energy efficiency, safety, output power, etc. of the electric vehicle can be optimized and improved according to the driving environment or driving conditions.

[0213] Furthermore, since the first motor 30A / second motor 30B and the special type battery 200S / normal type battery 200N connected to the first motor 30A / second motor 30B are located close to each other, wiring is easy, which reduces manufacturing cost and maintenance cost.

[0214] The special type battery 200S connected to the first motor 30A has higher energy efficiency and safety and lower output power than the general type battery 200N connected to the second motor 30B.

[0215] Therefore, in a driving environment or driving condition requiring high energy efficiency and high safety, the first motor 30A connected to the special type battery 200S having characteristics that match the driving environment or driving condition can be driven. On the other hand, in a driving environment or driving condition requiring high output power, the second motor 30B connected to the ordinary type battery 200N having characteristics that match the driving environment or driving condition can be driven. Therefore, the energy efficiency, safety, output, etc. of the electric vehicle can be optimized and improved according to the driving environment or driving conditions.

[0216] Meanwhile, although the drawings show a case where the battery pack 10 is used in the electric vehicle 1, the present invention is not limited to such a configuration. That is, the battery pack 10 may be used in various devices other than the electric vehicle 1.

[0217] It should be understood that the described embodiments are illustrative in all aspects and not restrictive, and the scope of the present invention will be indicated by the following claims rather than the specific embodiments described. The meaning and scope of the claims to be described later and all changes and modifications derived from equivalent concepts should be interpreted as included within the scope of the present invention.

[0218] Although the present invention has been described with reference to the exemplary drawings, it will be understood that the present invention is not limited to the embodiments and drawings disclosed in this specification, and it will be understood by those skilled in the art that various modifications are possible without departing from the scope and concept of the present invention. In addition, although the operational effects of the configuration according to the present invention are not explicitly described when describing the embodiments of the present invention, it should be understood that the predictable effects are also identified by the configuration.

Claims

1. A battery pack comprising: A base frame (100) having a plate shape and having a specific area (R) on an upper surface of the base frame; as well as a plurality of batteries (200) having a shape of a cross-sectional area (F) defined by an outermost contour of a cross section placed parallel to the upper surface of the base frame (100), wherein the plurality of batteries (200) are arranged on the upper surface of the base frame (100) within the specific area (R), The plurality of batteries (200) include a plurality of types of batteries (200N, 200S) having the cross-sectional areas (F) of different shapes, The specific region (R) extends in a first direction and in a second direction perpendicular to the first direction, At least a portion (RCP) of the periphery of the specific region (R) extends obliquely in a direction intersecting the first direction and the second direction, The cross-sectional area (F) of the plurality of batteries (200) extends in the first direction and the second direction, At least a portion of the plurality of batteries (200) are arranged side by side in the first direction or the second direction, Among the plurality of types of batteries (200), at least one type of battery (200) is a special type of battery (200S), and At least a portion (FCP) of the periphery of the cross-sectional area (F) of the special type of battery (200S) extends obliquely along the at least a portion (RCP) of the periphery of the specific area (R) in the direction intersecting the first direction and the second direction, and extends so that the angle difference between the extension direction of each segment of the at least a portion (FCP) of the periphery of the cross-sectional area (F) and the extension direction of each segment of the at least a portion (RCP) of the periphery of the specific area (R) corresponding to each segment of the at least a portion (FCP) of the periphery of the cross-sectional area (F) is less than a specific angle.

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

3. The battery pack according to claim 1, wherein: The plurality of types of batteries (200) include at least one of a fifth type of battery (200E) and a sixth type of battery (200F), The fifth type of battery (200E) and the sixth type of battery (200F) each correspond to the special type of battery (200S), The periphery of the cross-sectional area (F) of the fifth type of battery (200E) includes a first side (a), a second side (b), a third side (c) and a fourth side (d), the first side (a) and the second side (b) are arranged side by side in the first direction and extend in the second direction, the third side (c) corresponds to at least a portion (FCP) of the periphery of the cross-sectional area (F) and connects one end of the first side (a) of the fifth type of battery (200E) in the second direction with one end of the second side (b) in the second direction, the fourth side (d) corresponds to at least a portion (FCP) of the periphery of the cross-sectional area (F) and connects the other end of the first side (a) of the fifth type of battery (200E) in the second direction with the other end of the second side (b) in the second direction, and The periphery of the cross-sectional area (F) of the sixth type of battery (200F) includes a first side (a) and a second side (b), the first side (a) extending in the second direction, both ends of the second side (b) connected to both ends of the first side (a) of the sixth type of battery (200F), and protruding from the first side (a) of the sixth type of battery (200F) to one side or the other side in the first direction and corresponding to at least a portion (FCP) of the periphery of the cross-sectional area (F).

4. The battery pack according to claim 2 or 3, wherein: The plurality of types of batteries (200) include a common type of battery (200N), and The periphery of the cross-sectional area (F) of the common type battery (200N) includes a first side (a), a second side (b), a third side (c) and a fourth side (d), the first side (a) and the second side (b) are arranged side by side in the second direction and extend the same length in the first direction, the third side (c) and the fourth side (d) are arranged side by side in the first direction, extend the same length in the second direction and respectively connect one end of the first side (a) of the common type battery (200N) with one end of the second side (b) and the other end of the first side (a) with the other end of the second side (b).

5. The battery pack according to claim 1, wherein: At least a portion of the batteries (200) of two or more types among the plurality of types have different chemical characteristics according to their respective types, and thus differ in at least one of energy output, energy efficiency and safety.

6. The battery pack according to claim 5, wherein: The specific region (R) extends in a first direction and in a second direction perpendicular to the first direction, At least a portion (RCP) of the periphery of the specific region (R) extends obliquely in a direction intersecting the first direction and the second direction, The cross-sectional area (F) of the plurality of batteries (200) extends in the first direction and the second direction, At least a portion of the plurality of batteries (200) are arranged side by side in the first direction or the second direction, The multiple types of batteries (200) include one or more common type batteries (200N) and one or more special type batteries (200S), The periphery of the cross-sectional area (F) of the conventional type battery (200N) comprises a first side (a), a second side (b), a third side (c) and a fourth side (d), the first side (a) and the second side (b) being arranged side by side in the second direction and extending by the same length in the first direction, the third side (c) and the fourth side (d) being arranged side by side in the first direction, extending by the same length in the second direction and connecting one end of the first side (a) with one end of the second side (b) and the other end of the first side (a) with the other end of the second side (b), respectively. At least a portion (FCP) of the periphery of the cross-sectional area (F) of the special type of battery (200S) extends obliquely along the at least a portion (RCP) of the periphery of the specific region (R) in the direction intersecting the first direction and the second direction, and extends so that the angle difference between the extension direction of each segment of the at least a portion (FCP) of the periphery of the cross-sectional area (F) and the extension direction of each segment of the at least a portion (RCP) of the periphery of the specific region (R) corresponding to each segment of the at least a portion (FCP) of the periphery of the cross-sectional area (F) is less than a specific angle, At least a portion of the special type of batteries (200S) and at least a portion of the normal type of batteries (200N) have different chemical characteristics and differ in at least one of energy output, energy efficiency and safety.

7. The battery pack according to claim 6, wherein: In the at least a portion of the batteries of the special type (200S), the at least a portion (FCP) of the periphery of the cross-sectional area (F) is arranged adjacent to the at least a portion (RCP) of the periphery of the specific region (R) corresponding to the at least a portion (FCP) of the periphery of the cross-sectional area (F), The normal type battery (200N) is arranged on the remaining portion of the specific area (R) where the special type battery (200S) is not arranged, and The safety of at least a portion of the batteries (200) of the special type of batteries (200S) arranged at least a portion (RCP) of the periphery adjacent to the specific region (R) is higher than the safety of at least a portion of the batteries (200) of the ordinary type of batteries (200N) arranged at least a portion (RCP) of the periphery not adjacent to the specific region (R).

8. An electric vehicle comprising: The battery pack (10) according to claim 7; as well as Wheel (20), wherein the base frame (100) extends in the first direction and the second direction and is coupled to the wheel (20), and At least a portion of the periphery of one end of the specific region (R) in the first direction corresponds to at least a portion of the periphery (RCP) of the specific region (R), and therefore, in at least a portion of the batteries of the special type (200S), at least a portion of the periphery (FCP) of the cross-sectional area (F) is arranged adjacent to at least a portion of the periphery of one end of the specific region (R) in the first direction, corresponding to at least a portion of the periphery (FCP) of the cross-sectional area (F).

9. The electric vehicle according to claim 8, wherein: One side of the base frame (100) in the first direction is the front side of the vehicle, and the other side of the base frame (100) in the first direction is the rear side of the vehicle. Accordingly, the one end of the specific area (R) in the first direction is located at the front side of the vehicle.

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

11. The electric vehicle according to claim 9, comprising a first motor (30A) and a second motor (30B), the first motor and the second motor being arranged on one side and the other side in the first direction, respectively. in, The wheel (20) includes one or more first wheels (20A) and one or more second wheels (20B), the one or more first wheels are arranged on the one side in the first direction and coupled to the first motor (30A), and the one or more second wheels are arranged on the other side in the first direction and coupled to the second motor (30B), Among the special type of batteries (200S) arranged adjacent to at least a portion (RCP) of the periphery of the one end of the specific region (R) in the first direction, at least a portion of the batteries (200) are connected to the first motor (30A) to supply power to the first motor (30A), At least a portion of the batteries (200) of the normal type of batteries (200N) disposed on the remaining portion of the specific area (R) where the batteries (200S) of the special type are not disposed is connected to the second motor (30B) to supply power to the second motor (30B), and The special type of battery (200S) connected to the first motor (30A) and the normal type of battery (200N) connected to the second motor (30B) differ in at least one of energy output, energy efficiency and safety.

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

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