Mobile

Abstract

To provide a superior mobile device. [Solution] The mobile unit (vehicle 100) comprises a mobile unit body (vehicle auxiliary 110), a first battery pack 10 and a second battery pack 20 that are interchangeably attached to the mobile unit body, and a motor M for moving the mobile unit body. The first battery pack 10 and the second battery pack 20 are power sources for driving the motor M. The first battery pack 10 is lighter or smaller than the second battery pack 20. The first battery pack 10 and the second battery pack 20 are built into the mobile unit body. The first battery pack 10 is positioned closer to the inner surface of the mobile unit body or closer to the outer surface of the mobile unit body when viewed from above, compared to the second battery pack 20.

Description

Technical Field

[0001] The present disclosure relates to a moving body.

Background Art

[0002] As an example of a moving body, Patent Document 1 discloses a vehicle having a high-output type battery pack and a high-capacity type battery pack.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Conventionally, a more excellent moving body has been desired. Therefore, an object of the present disclosure is to provide a more excellent moving body.

Means for Solving the Problems

[0005] A moving body according to an aspect of the present disclosure includes a moving body main body, a first battery pack that is detachably attached to the moving body main body, a second battery pack, and a motor for moving the moving body main body. The first battery pack and the second battery pack are power sources for driving the motor. The first battery pack is lighter or smaller than the second battery pack. The first battery pack and the second battery pack are built in the moving body main body. The first battery pack is disposed closer to the inner surface of the moving body main body or closer to the outer surface of the moving body main body when viewed from above than the second battery pack.

[0006] A mobile body according to another aspect of the present disclosure comprises a mobile body, a first battery pack, a second battery pack, and a motor for moving the mobile body, wherein the first and second battery packs are power sources for driving the motor, the first battery pack is lighter or smaller than the second battery pack, the first and second battery packs are built into the mobile body, and the first battery pack is positioned closer to the outer surface of the mobile body when viewed from above than the second battery pack. [Effects of the Invention]

[0007] According to this disclosure, a superior mobile device can be provided. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is an explanatory diagram of a vehicle, which is an example of a mobile body according to the embodiment. [Figure 2] Figure 2 is a perspective view showing a hook mechanism according to an embodiment. [Figure 3] Figure 3 is a perspective view showing a fixed structure according to an embodiment. [Figure 4] Figure 4 is a plan view showing a roller according to an embodiment. [Figure 5A] Figure 5A is an explanatory diagram showing an example of the arrangement of terminals in the first battery pack according to the embodiment. [Figure 5B] Figure 5B is an explanatory diagram showing an example of the arrangement of terminals in the first battery pack according to the embodiment. [Figure 5C] Figure 5C is an explanatory diagram showing an example of the arrangement of terminals in the first battery pack according to the embodiment. [Figure 6A] Figure 6A is a cross-sectional view showing another first battery pack according to the embodiment. [Figure 6B] Figure 6B is a cross-sectional view showing another first battery pack according to the embodiment. [Figure 7] Figure 7 is a side cross-sectional view of the vehicle body showing the first opening according to the embodiment. [Figure 8]FIG. 8 is a circuit diagram showing an electrical connection structure of a first battery pack, a second battery pack, and a motor according to an embodiment. [Figure 9] FIG. 9 is a side sectional view showing another arrangement example of terminals of a vehicle body according to Modification 1. [Figure 10] FIG. 10 is an explanatory view showing a vehicle according to Modification 2. [Figure 11] FIG. 11 is an explanatory view showing a vehicle according to Modification 3. [Figure 12] FIG. 12 is a circuit diagram showing an electrical connection structure of a first battery pack, a second battery pack, and a motor according to Modification 4. [Figure 13A] FIG. 13A is an explanatory view showing another layout example of a first battery pack according to Modification 5. [Figure 13B] FIG. 13B is an explanatory view showing another layout example of a first battery pack according to Modification 5. [Figure 13C] FIG. 13C is an explanatory view showing another layout example of a first battery pack according to Modification 5. [Figure 13D] FIG. 13D is an explanatory view showing another layout example of a first battery pack according to Modification 5. [Figure 14] FIG. 14 is a schematic side sectional view of a vehicle according to Modification 6 as viewed from the XZ section. [Figure 15] FIG. 15 is an explanatory view showing a vehicle which is an example of a moving body according to Modification 7.

Embodiments for Carrying Out the Invention

[0009] (Summary of the Present Disclosure) Examples of a plurality of moving bodies according to the present disclosure are shown below.

[0010] A mobile body according to a first aspect of the present disclosure comprises a mobile body, a first battery pack and a second battery pack interchangeably attached to the mobile body, and a motor for moving the mobile body, wherein the first battery pack and the second battery pack are power sources for driving the motor, the first battery pack is lighter or smaller than the second battery pack, the first battery pack and the second battery pack are built into the mobile body, and the first battery pack is positioned closer to the inner surface of the mobile body or closer to the outer surface of the mobile body when viewed from above than the second battery pack.

[0011] According to this, the first battery pack is positioned closer to the inner surface of the mobile body or closer to the outer surface of the mobile body when viewed from above, compared to the second battery pack. Therefore, the first battery pack can be easily replaced from the outer or inner surface of the mobile body. This provides a mobile body with superior battery pack replaceability.

[0012] In a second embodiment of this disclosure, for example, in the mobile body according to the first embodiment, a first opening may be formed on the outer surface or the inner surface of the mobile body, and the first battery pack may be positioned closer to the first opening than the second battery pack.

[0013] According to this, since the first battery pack is positioned closer to the first opening formed on the outer or inner surface of the mobile body than the second battery pack, the first battery pack can be easily replaced through the first opening.

[0014] In a third embodiment of this disclosure, for example, in the mobile body according to the second embodiment, a second opening may be formed in the mobile body body at a position different from the first opening, and the second battery pack may be positioned closer to the second opening than the first battery pack.

[0015] According to this, since the second battery pack is positioned closer to the second opening formed in the mobile body than the first battery pack, interference with the second battery pack is less likely when replacing the first battery pack.

[0016] In a fourth aspect of this disclosure, for example, in a mobile body according to the second or third aspect, the first opening may be located on the inner surface of the mobile body.

[0017] According to this design, since the first opening is located on the inner surface of the mobile unit, the first battery pack can be easily replaced from the inner surface of the mobile unit through the first opening. In particular, since the first opening is located on the inner surface of the mobile unit, it is possible to prevent rainwater and other liquids from entering the first opening.

[0018] In a fifth aspect of this disclosure, for example, in a mobile body according to the second or third aspect, the first opening may be located on the outer surface of the mobile body.

[0019] According to this, since the first opening is located on the outer surface of the mobile unit, the first battery pack can be easily replaced from the outer surface of the mobile unit through the first opening.

[0020] In the sixth aspect of this disclosure, for example, in a mobile body according to any one of the first to fifth aspects, the first battery pack may be positioned further forward in the direction of travel of the mobile body than the second battery pack.

[0021] According to this design, the first battery pack is positioned further forward than the second battery pack in the direction of travel of the mobile unit, allowing for easy replacement of the first battery pack from the front. Furthermore, when the mobile unit receives an impact from the front, the first battery pack can function as a shock absorber. In other words, it can mitigate the impact received by the second battery pack, which is heavier or larger than the first battery pack.

[0022] In the seventh aspect of this disclosure, for example, in a mobile body according to any one of the first to fifth aspects, the first battery pack may be positioned further rearward in the direction of travel of the mobile body than the second battery pack.

[0023] According to this design, the first battery pack is positioned further rearward than the second battery pack in the direction of travel of the mobile unit, allowing for easy replacement of the first battery pack from the rear. Furthermore, when the mobile unit receives an impact from the rear, the first battery pack can function as a shock absorber. In other words, it can mitigate the impact received by the second battery pack, which is heavier or larger than the first battery pack.

[0024] In the eighth aspect of this disclosure, for example, in a mobile body relating to any one of the first to seventh aspects, the first battery pack may have a smaller charge / discharge capacity than the second battery pack.

[0025] According to this, since the charge / discharge capacity of the first battery pack is smaller than that of the second battery pack, the first battery pack can be charged more rapidly outside the mobile device after being replaced. In addition, when replacing the first battery pack, the amount of energy stored in it is small, which improves safety during handling.

[0026] In the ninth aspect of this disclosure, for example, in a mobile body relating to any one of the first to eighth aspects, the first battery pack may be positioned above the second battery pack.

[0027] According to this design, since the first battery pack is positioned above the second battery pack, replacing the first battery pack from above becomes easier. Also, because the heavier or larger second battery pack is positioned below the first battery pack, the center of gravity of the mobile device is lowered, improving stability during operation.

[0028] In the tenth embodiment of this disclosure, for example, in a mobile body according to any one of the first to eighth embodiments, the first battery pack may be positioned below the second battery pack.

[0029] According to this design, since the first battery pack is positioned below the second battery pack, replacing the first battery pack becomes easier when replacing it from below.

[0030] In the eleventh aspect of this disclosure, for example, in a mobile body relating to any one of the first to tenth aspects, the first battery pack and the second battery pack may be electrically connected in parallel to the motor.

[0031] According to this, since the first battery pack and the second battery pack are electrically connected in parallel to the motor, even if the charge level of one of the battery packs is depleted, the motor can still be driven using only the battery pack that still has charge remaining.

[0032] In the twelfth aspect of this disclosure, for example, in a mobile body according to any one of the first to tenth aspects, the first battery pack and the second battery pack may be electrically switchable and connected to the motor.

[0033] According to this, the first and second battery packs are electrically switchable between the two and the motor. Therefore, for example, even if the second battery pack connected to the motor runs out of charge, the motor can still be driven by switching to the first battery pack, which still has charge remaining.

[0034] In the thirteenth aspect of this disclosure, for example, the moving body relating to any one of the first to twelfth aspects may be an automobile.

[0035] According to this, even when the moving object is a car, it can be made into an excellent car.

[0036] A mobile body according to a fourteenth aspect of the present disclosure comprises a mobile body, a first battery pack, a second battery pack, and a motor for moving the mobile body, wherein the first battery pack and the second battery pack are power sources for driving the motor, the first battery pack is lighter or smaller than the second battery pack, the first battery pack and the second battery pack are built into the mobile body, and the first battery pack is positioned closer to the outer surface of the mobile body when viewed from above than the second battery pack.

[0037] Generally, the main structures of a mobile vehicle are positioned as close to the center of the vehicle body as possible. In other words, excess space is easily created in the area near the outer surface of the vehicle body. In this embodiment, the first battery pack is positioned closer to the outer surface of the vehicle body when viewed from above than the second battery pack, so the excess space can be used as the housing space for the first battery pack. Therefore, the total capacity of the battery packs that can be mounted on the vehicle can be increased, and the driving range per charge can be extended. This makes it possible to provide a superior vehicle.

[0038] [Embodiment] The embodiments will be described in detail below with reference to the drawings. Note that the embodiments described below are all specific examples of this disclosure. The numerical values, shapes, materials, components, arrangement positions of components, and connection configurations shown in the following embodiments are examples only and are not intended to limit this disclosure. Furthermore, among the components in the following embodiments, those not described in the independent claim representing the highest-level concept will be described as optional components.

[0039] Furthermore, each figure is a schematic diagram and not necessarily a strictly accurate representation. Therefore, for example, the scale may not necessarily match in each figure. Also, in each figure, substantially identical components are given the same reference numerals, and redundant explanations are omitted or simplified.

[0040] Furthermore, in this specification, terms indicating relationships between elements such as parallel or orthogonal, terms indicating the shape of elements such as rectangles or cuboids, and numerical ranges do not represent only strict meanings, but also include substantially equivalent ranges, such as differences of a few percent.

[0041] In this specification and in the drawings, the X-axis, Y-axis, and Z-axis directions refer to the three axes of a three-dimensional Cartesian coordinate system. The X-axis direction indicates the front-to-back direction of the moving object, with the positive X-axis direction indicating the front and the negative X-axis direction indicating the rear. The Y-axis direction indicates the width direction of the moving object, with the positive Y-axis direction indicating the right and the negative Y-axis direction indicating the left. The Z-axis direction indicates the height direction of the moving object, with the positive Y-axis direction indicating the up and the negative Y-axis direction indicating the down.

[0042] Furthermore, in this specification, ordinal numbers such as "first" and "second" do not mean the number or order of components unless otherwise specified, but are used to avoid confusion between similar components and to distinguish them.

[0043] In this embodiment, a four-wheeled automobile vehicle 100 is used as an example to describe the mobile body according to this disclosure. However, the mobile body may be any mobile body in which a motor is the driving source for movement. For example, the mobile body may be an automobile other than a four-wheeled vehicle (e.g., a three-wheeled automobile). The mobile body may be a two-wheeled vehicle such as a motorcycle or an electric bicycle. The mobile body may be a mobile body that can travel on the ceiling or walls. The mobile body may be a mobile body that can move in the air, such as a drone, or a mobile body that can move on or underwater. The mobile body may be manually operated, remotely operated, or automatically operated.

[0044] Figure 1 is an explanatory diagram of a vehicle 100, which is an example of a mobile body according to an embodiment. Figure 1 shows a schematic side cross-sectional view of the vehicle 100 as seen from the XZ cross-section, and a schematic top view showing the positional relationship between the first battery pack 10 and the second battery pack 20 provided in the vehicle 100. In the top view, the outer shape of the vehicle 100 is shown by a dashed line.

[0045] As shown in Figure 1, the vehicle 100 comprises a vehicle body 110, a motor M, a first battery pack 10, and a second battery pack 20. The vehicle body 110 is an example of a mobile body and has a passenger compartment 101 inside. The first battery pack 10, the second battery pack 20, and the motor M are housed in locations separate from the passenger compartment 101 within the vehicle body 110. The first battery pack 10, the second battery pack 20, and the motor M are all housed within the vehicle body 110. The motor M is connected to the drive wheels of the vehicle body 110 and is the power source for those drive wheels. The motor M is located at the front of the vehicle body 110.

[0046] The first battery pack 10 and the second battery pack 20 are separate packaged battery packs. In other words, batteries within the same battery pack are not defined as the first battery pack 10 or the second battery pack 20, respectively. For example, a battery pack comprises a container that houses at least one battery. The container of the battery pack has a mechanism for being attached to the vehicle body. A battery pack may contain a rechargeable secondary battery that can be repeatedly charged and discharged, or it may contain a primary battery that is discharged once. A battery pack may be a battery pack made up of multiple batteries, or a battery unit made up of multiple battery packs. A battery pack is also generally called a module. The mechanism for being attached to the vehicle body 110 refers to terminals that conduct electricity to a circuit provided on the vehicle body 110, a protruding part that is fixed to an attachable position provided on the vehicle body 110, etc.

[0047] The first battery pack 10 may be lighter or smaller than the second battery pack 20. In other words, the charge / discharge capacity of the first battery pack 10 is smaller than that of the second battery pack 20. In this embodiment, we illustrate the case where the first battery pack 10 is lighter and smaller than the second battery pack 20.

[0048] The second battery pack 20 has a flattened outer shape and is positioned below the vehicle compartment 101 along the XY plane. The first battery pack 10 has a flattened outer shape and is positioned along the XY plane. The first battery pack 10 is positioned behind the second battery pack 20 in the direction of travel and above the second battery pack 20.

[0049] Specifically, the rear end of the first battery pack 10 is positioned behind the rear end of the second battery pack 20. The lower end of the first battery pack 10 only needs to be positioned above the lower end of the second battery pack 20, but in this embodiment, it is positioned above the upper end of the second battery pack 20. The first battery pack 10 and the second battery pack 20 may or may not overlap in parts when viewed from above or from the side.

[0050] The first battery pack 10 is positioned closer to the outer surface of the vehicle body 110 when viewed from above than the second battery pack 20 (first condition). The outer surface of the vehicle body 110 refers to the surface exposed to the outside of the vehicle body 110. Here, the outer surface of the vehicle body 110 when viewed from above refers to the outer surface excluding the outer bottom surface of the vehicle body 110 which is not visible when viewed from above. The outer surface of the vehicle body 110 when viewed from above includes the outer surface of the bumper, the outer surface of the door, the outer surface of the roof, etc.

[0051] To determine if the first condition is met, for example, one can compare the first straight-line distance between the closest points of the outer surface of the vehicle body 110 and the first battery pack 10 when the vehicle body 110 is viewed from above, with the second straight-line distance between the closest points of the outer surface and the second battery pack 20. Alternatively, to determine if the first condition is met, one can compare the distance from the outer surface of the vehicle body 110 to the center of gravity of the first battery pack 10 when the vehicle body 110 is viewed from above, with the distance from the outer surface to the center of gravity of the second battery pack 20.

[0052] The first battery pack 10 may be replaceable with respect to the vehicle body 110. Replacing the first battery pack 10 leads to a reduction in the charging time of the vehicle 100. Therefore, a superior mobile device can be provided.

[0053] Here, "easily replaceable" means that the first battery pack 10 can be replaced without damaging it, and that it can be replaced in a short time, such as within 30 minutes, without requiring special skills, special knowledge, or large-scale equipment. In other words, it is assumed that the user of the vehicle 100 or a battery replacement worker can replace the first battery pack 10 themselves.

[0054] The first battery pack 10 may be provided with a handle or the like for the user to grip when replacing it. This handle is not limited to being gripped by the user; it may also be gripped by a device that replaces the first battery pack 10. Providing a handle or the like makes it easier to replace the first battery pack 10.

[0055] The vehicle 100 or the first battery pack 10 may be equipped with a sensor that determines whether the replacement has been performed correctly, and a notification unit that provides notification based on the detection result of the sensor. This prevents the user from operating the vehicle 100 without realizing that the replacement of the first battery pack 10 has not been performed correctly, thereby improving safety and reliability. The sensor can be a commonly used type, such as an optical sensor, magnetic sensor, electrical sensor, or contact sensor.

[0056] Furthermore, a hook mechanism may be provided as a mounting structure for the first battery pack 10 to the vehicle 100. Figure 2 is a perspective view showing a hook mechanism 200 according to an embodiment. As shown in Figure 2, the hook mechanism 200 has a hook 201 provided on one of the vehicle body 110 and the first battery pack 10, and an engaging portion 202 provided on the other. The engaging portion 202 is the part into which the hook 201 is engaged. The engaging portion 202 has an insertion portion 203 into which the hook 201 is inserted. The insertion portion 203 can take any form as long as the hook 201 is engaged, for example, a through hole, a hole, a notch, etc. With such a hook mechanism 200, the first battery pack 10 can be easily attached and detached.

[0057] As a mounting structure for the first battery pack 10 to the vehicle 100, for example, multiple locking mechanisms may be provided. Specifically, if multiple locking mechanisms are provided on one of the vehicle 100 and the first battery pack 10, and a locking shaft corresponding to the multiple locking mechanisms is provided on the other, the first battery pack 10 can be mounted on the vehicle 100. This distributes the weight of the first battery pack 10 across the multiple locking mechanisms, resulting in a vehicle 100 with improved security of the locking mechanism.

[0058] The locking mechanism may also have a mechanism that switches between the locked and unlocked states using an elastic body such as a spring. The presence of an elastic body makes it easier to switch between the locked and unlocked states. The locking shaft may have a structure in which the position in contact with the locking mechanism is rotatable. This rotatability helps to suppress wear on the locking shaft. The locking shaft may have an electromagnetic induction element such as magnetic steel. If the locking shaft has an electromagnetic induction element, a magnetic sensor can determine whether or not the locking shaft has reached the locked position.

[0059] Furthermore, the mounting structure for the first battery pack 10 to the vehicle body 110 may include a mechanism for manually locking and unlocking, and an automatic locking and unlocking mechanism such as an electric one. This makes it possible to realize a more reliable vehicle 100.

[0060] In addition to the mounting structure for the first battery pack 10 on the vehicle body 110, there may also be a fixing structure. For example, the fixing structure is a structure that can suppress the movement of the first battery pack 10 in directions that cannot be fixed by the mounting structure. The directions that cannot be fixed by the mounting structure are, for example, directions perpendicular to the mounting direction of the first battery pack 10. That is, if the mounting direction is the X-axis direction, the fixing structure is a structure that restricts the movement of the first battery pack 10 in at least one of the Y-axis direction and the X-axis direction.

[0061] Figure 3 is a perspective view showing a fixed structure 300 according to an embodiment. As shown in Figure 3, the fixed structure 300 has a trapezoidal protrusion 301 in a top view provided at the end of the first battery pack 10 in the X-axis positive direction, and a trapezoidal recess 302 in a top view provided inside the vehicle body 110. The recess 302 is shaped to fit the protrusion 301. The fit of the protrusion 301 into the recess 302 restricts the movement of the first battery pack 10 in the Y-axis direction. In Figure 3, an example is shown where the protrusion 301 is provided on the first battery pack 10 and the recess 302 is provided on the vehicle body 110, but the protrusion may be provided on the vehicle body and the recess on the first battery pack. The shapes of the protrusion and recess are not limited to trapezoids as long as they fit together. The fixed structure does not have to be a physical structure as shown in Figure 3, and may be a magnetic fixed structure.

[0062] By using such a fixed structure, it is possible to better avoid abnormal noise and wear of the first battery pack 10 due to collisions in a predetermined direction, even when the vehicle 100 is traveling on a curve or when the driving is unstable.

[0063] At least one of the vehicle body 110 and the first battery pack 10 may have rollers to mitigate wear on the first battery pack 10. Figure 4 is a plan view showing rollers 11 according to an embodiment. As shown in Figure 4, rollers 11 are rotatably attached to both ends of the first battery pack 10 in the X-axis direction. The number of rollers 11 is not limited, but two locations, front and rear, are preferred from the viewpoint of stability. These rollers 11 allow the first battery pack 10 to move smoothly in the insertion direction. This reduces wear on the first battery pack 10 when it is installed on the vehicle body 110, and improves the durability of the first battery pack 10.

[0064] Furthermore, a cushioning material may be provided on the first battery pack 10. By providing a cushioning material, the impact on the first battery pack 10 when it is installed on the vehicle body 110 can be mitigated. In addition, it is also possible to mitigate the impact on the first battery pack 10 during driving.

[0065] The position of the terminal 12 in the first battery pack 10 may be at least one of the following: the center in the width direction (Y-axis direction) of the first battery pack 10, or the center in the thickness direction (Z-axis direction) of the first battery pack 10.

[0066] Figures 5A to 5C are explanatory diagrams showing examples of the arrangement of terminals 12 of the first battery pack 10 according to the embodiment. In Figure 5A, the terminals 12 of the first battery pack 10 are provided only in the center of the width direction of the first battery pack 10 and extend across the entire thickness direction. In Figure 5B, the terminals 12 of the first battery pack 10 are provided only in the center of the thickness direction of the first battery pack 10 and extend across the entire width direction. In Figure 5C, the terminals 12 of the first battery pack 10 are provided only in the center of the width direction of the first battery pack 10 and only in the center of the thickness direction. With these arrangements, the terminals 12 can be placed in the predetermined position even if the first battery pack 10 is turned inside out in the thickness direction. This makes it easier to install the first battery pack 10.

[0067] The terminals 12 of the first battery pack 10 do not need to be exposed when the first battery pack 10 is present on its own, but they may be exposed when the first battery pack 10 is installed in a mounting position on a vehicle.

[0068] Figures 6A and 6B are cross-sectional views showing another first battery pack 10a according to an embodiment. As shown in Figures 6A and 6B, the first battery pack 10a has an outer casing 13a that houses the pack body 19a. The terminals 12a of the pack body 19a are oriented in the positive X-axis direction. The outer casing 13a has an opening 14a positioned corresponding to the terminals 12a and a hinged lid 15a that opens and closes the opening 14a. Figure 6A shows the lid 15a closed over the opening 14a, while Figure 6B shows the lid 15a pushed inward into the outer casing 13a, opening the opening 14a.

[0069] This prevents users from touching terminal 12a, thereby improving safety. The switching between exposed and non-exposed terminal 12a may be performed electronically or in conjunction with a mechanism provided at the mounting location on the vehicle body 110.

[0070] Furthermore, the cover portion 15a that covers the terminals 12a of the first battery pack 10a is not required. That is, the terminals 12a of the pack body 19a may be placed behind an opening 14a provided in the outer casing 13a of the first battery pack 10a, and the terminals of the vehicle body 110 may be made convex, thereby enabling power to be passed between the first battery pack 10a and the vehicle body 110. In this case, the opening 14a leading to the terminals 12a of the first battery pack 10a may be large enough to prevent a person's hand from entering. This would prevent users from touching the terminals 12a, thereby improving safety.

[0071] The power supply between the first battery pack 10 and the vehicle body 110 may be performed wirelessly, for example, using electromagnetic induction. In this case, the power generation element included in the first battery pack 10 may be a power generation element that operates at high temperatures by utilizing the heat generated by the wireless power supply. Examples of power generation elements that operate at high temperatures include all-solid-state batteries, NAS batteries, and fluoride ion batteries. Furthermore, at least one of the first battery pack 10 or the vehicle body 110 may be provided with a structure to dissipate the heat generated by the wireless power supply. Examples of structures to dissipate the generated heat include fans and Peltier elements. In this way, since the power supply between the first battery pack 10 and the vehicle body 110 is performed wirelessly, there is no need to provide terminals on the surface of the first battery pack 10, thus improving safety.

[0072] The first battery pack 10 may be placed inside a first opening 111 provided in the vehicle body 110. Figure 7 is a side cross-sectional view of the vehicle body 110 showing the first opening 111 according to this embodiment. As shown in Figure 7, the first opening 111 is an opening extending in the positive X-axis direction formed at the rear end of the vehicle body 110 on the outer surface of the vehicle body 110. The first battery pack 10 is inserted into this first opening 111. A terminal 102 on the vehicle 100 side is provided at the X-axis positive end of the first opening 111. The first opening 111 may be closed with a first cover (not shown) when not inserting or removing the first battery pack 10.

[0073] Furthermore, a second opening 112 is formed on the outer bottom surface of the vehicle body 110. The second opening 112 is an opening that extends in the positive Z-axis direction. The second battery pack 20 is housed inside the second opening 112. The second opening 112 is closed by the second cover 113.

[0074] Thus, the first battery pack 10 is positioned closer to the first opening 111 than the second battery pack 20. This allows the first battery pack 10 to be easily replaced through the first opening 111.

[0075] Furthermore, the second battery pack 20 is positioned closer to the second opening 112 than the first battery pack 10. This makes it less likely for the second battery pack 20 to interfere with the first battery pack 10 when it is replaced.

[0076] The terminal 102 for powering the first battery pack 10 on the vehicle body 110 is located behind the first opening 111 at the mounting position of the first battery pack 10. Therefore, once the first battery pack 10 is installed and the mounting is complete, it is possible to power the first battery pack 10 to the vehicle body 110.

[0077] Figure 8 is a circuit diagram showing the electrical connection structure of the first battery pack 10, the second battery pack 20, and the motor M according to an embodiment. As shown in Figure 8, the first battery pack 10 and the second battery pack 20 are electrically connected in parallel to the motor M. In this way, since the first battery pack 10 and the second battery pack 20 are electrically connected in parallel to the motor M, even if the charge level of one of the battery packs is depleted, the motor M can be driven using only the other battery pack that still has a charge level.

[0078] (Effects, etc.) As described above, according to the vehicle 100 of this disclosure, the first battery pack 10 is positioned closer to the outer surface of the vehicle body 110 than the second battery pack 20 when the vehicle body 110 is viewed from above. In other words, because the first condition is met, the first battery pack 10 can be easily replaced from the outer surface of the vehicle body 110. A more superior mobile vehicle can be provided from the viewpoint of the replaceability of the first battery pack 10.

[0079] Generally, the main structures of the vehicle 100 are positioned as close to the center of the vehicle body 110 as possible. In other words, excess space is easily created in the area near the outer surface of the vehicle body 110. In this embodiment, the first battery pack 10 is positioned closer to the outer surface of the vehicle body 110 when viewed from above than the second battery pack 20, so the excess space can be used as the housing space for the first battery pack 10. Therefore, the total capacity of the battery packs that can be mounted on the vehicle 100 can be increased, and the driving range per charge can be extended. This makes it possible to provide a superior mobile vehicle.

[0080] Since the first battery pack 10 is positioned closer to the first opening 111 formed on the outer surface of the vehicle body 110 than the second battery pack 20, the first battery pack 10 can be easily replaced through the first opening 111.

[0081] Since the second battery pack 20 is positioned closer to the second opening 112 formed in the vehicle body 110 than the first battery pack 10, interference with the second battery pack 20 is less likely when replacing the first battery pack 10.

[0082] Since the first opening 111 is located on the outer surface of the vehicle body 110, the first battery pack 10 can be easily replaced from the outer surface of the vehicle body 110 through the first opening 111.

[0083] Since the first battery pack 10 is positioned further rearward in the direction of travel of the vehicle 100 than the second battery pack 20, the first battery pack 10 can be easily replaced from the rear in the direction of travel. Furthermore, when the vehicle body 110 is subjected to an impact from the rear in the direction of travel, the first battery pack 10 can function as a shock absorber. In other words, it can mitigate the impact received by the second battery pack 20, which is heavier or larger than the first battery pack 10.

[0084] Since the charge / discharge capacity of the first battery pack 10 is smaller than that of the second battery pack 20, the first battery pack 10 can be charged more rapidly outside the vehicle 100 after being replaced. In addition, when replacing the first battery pack 10, the small amount of energy stored in it improves handling safety.

[0085] Since the first battery pack 10 is positioned above the second battery pack 20, replacing the first battery pack 10 from above becomes easier. Also, because the heavier or larger second battery pack 20 is positioned below the first battery pack 10, the center of gravity of the vehicle 100 is lowered, improving stability during operation.

[0086] Since the first battery pack 10 and the second battery pack 20 are electrically connected in parallel to the motor M, even if the charge level of one of the battery packs is depleted, the motor M can still be driven using only the other battery pack that still has a charge level.

[0087] Since the moving object having these characteristics is the vehicle 100, it can be made into an excellent vehicle 100.

[0088] Furthermore, since the first battery pack 10 is lighter than the second battery pack 20, it is possible to handle the first battery pack 10 more easily when replacing it.

[0089] Furthermore, since the first battery pack 10 is smaller than the second battery pack 20, the space consumed by the first battery pack 10 can be reduced. As a result, a larger space can be maintained for the user inside the vehicle body 110.

[0090] [Differentiation] The following describes modified examples of the mobile body relating to this disclosure. In the following description, parts equivalent to those in the above embodiments will be denoted by the same reference numerals, and their descriptions may be omitted.

[0091] (Variation 1) Figure 9 is a side cross-sectional view showing another example of the arrangement of the terminal 102b of the vehicle body 110b according to Modification 1. As shown in Figure 9, the terminal 102b for energizing the first battery pack 10b on the vehicle body 110b may be located near the entrance of the first opening 111. In this case, the terminal of the first battery pack 10b is also located at a position corresponding to the terminal 102b. This makes it easier to replace the first battery pack 10 by visually checking the terminal 102 when replacing it.

[0092] (Modification 2) Figure 10 is an explanatory diagram showing vehicle 100C according to modified example 2. Figure 10 corresponds to Figure 1. As shown in Figure 10, the first battery pack 10c is located in front of the second battery pack 20 in the direction of travel and above the second battery pack 20. Specifically, the front end of the first battery pack 10c is located in front of the front end of the second battery pack 20. The lower end of the first battery pack 10c only needs to be located above the lower end of the second battery pack 20, but here it is located above the upper end of the second battery pack 20.

[0093] Thus, since the first battery pack 10c is positioned further forward in the direction of travel of the vehicle 100C than the second battery pack 20, the first battery pack 10c can be easily replaced from the front in the direction of travel. Furthermore, when the vehicle body 110 is subjected to an impact from the front in the direction of travel, the first battery pack 10c can function as a shock absorber. In other words, it can mitigate the impact received by the second battery pack 20, which is heavier or larger than the first battery pack 10c.

[0094] (Variation 3) Figure 11 is an explanatory diagram showing vehicle 100D according to modified example 3. Figure 11 corresponds to Figure 1. As shown in Figure 11, the first battery pack 10d is located behind the second battery pack 20 in the direction of travel and below the second battery pack 20. Specifically, the rear end of the first battery pack 10d is located behind the rear end of the second battery pack 20. The upper end of the first battery pack 10d only needs to be located below the upper end of the second battery pack 20, but here it is located below the lower end of the second battery pack 20.

[0095] As described above, since the first battery pack 10d is positioned below the second battery pack 20, it becomes easier to replace the first battery pack 10d when replacing it from below.

[0096] (Modification 4) Figure 12 is a circuit diagram showing the electrical connection structure of the first battery pack 10, the second battery pack 20, and the motor M according to Modification 4. As shown in Figure 12, the first battery pack 10 and the second battery pack 20 are electrically connected in parallel to the motor M, and a switch 30 is provided at the connection point. The switch 30 switches between a first conductive state in which the motor M and the first battery pack 10 are electrically connected, and a second conductive state in which the motor M and the second battery pack 20 are electrically connected. In other words, the first battery pack 10 and the second battery pack 20 are electrically switchable with respect to the motor M. Therefore, for example, even if the charge remaining in the second battery pack 20 that was connected to the motor M is depleted, the motor M can be driven by switching the connection to the first battery pack 10, which still has charge remaining.

[0097] (Variation 5) Modification 5 illustrates the layout of the first battery pack 10e. Note that the installation location and number of the first battery pack 10e can be anything, as long as the first condition is met. Therefore, the design flexibility of the vehicle body 110 or the first battery pack 10e is further increased.

[0098] Figures 13A, 13B, 13C, and 13D are explanatory diagrams showing other layout examples of the first battery pack 10e according to Modification 5. Specifically, Figures 13A, 13B, 13C, and 13D are schematic top views showing the positional relationship between the first battery pack 10e and the second battery pack 20 provided in the vehicle 100. In these figures, the outer shape of the vehicle 100E is shown by a dashed line.

[0099] As shown in Figure 13A, the first battery pack 10e may be located at the rear of the vehicle body 110e, at one end in the Y-axis direction. As shown in Figure 13B, the first battery pack 10e may be located at the central part of the vehicle body 110e in the X-axis direction, at one end in the Y-axis direction.

[0100] There may be two first battery packs 10e. As shown in Figure 13C, one first battery pack 10e may be located at the rear of the vehicle body 110e, at one end in the Y-axis direction, and the other first battery pack 10e may be located at the front of the vehicle body 110e, at the other end in the Y-axis direction. As shown in Figure 13D, one first battery pack 10e may be located at the center of the vehicle body 110e in the X-axis direction, at one end in the Y-axis direction, and the other first battery pack 10e may be located at the center of the vehicle body 110e in the X-axis direction, at the other end in the Y-axis direction.

[0101] (Experimental variation 6) Modification 6 describes the case where the first battery pack 10f is closer to the inner surface of the vehicle body 110 than the second battery pack 20. Figure 14 is a schematic side cross-sectional view of the vehicle 100F according to Modification 6, viewed from the XZ section. As shown in Figure 14, the vehicle body 110f of the vehicle 100F is provided with a first opening 111f formed on the inner surface of the vehicle body 110f. Specifically, the first opening 111f is located near the center console of the passenger compartment. The first battery pack 10f is inserted into the first opening 111f. As a result, the first battery pack 10f is positioned closer to the inner surface of the vehicle body 110f than the second battery pack 20 (second condition).

[0102] To determine if the second condition is met, for example, one can compare the first straight-line distance between the closest points of the inner surface of the vehicle body 110 and the first battery pack 10 with the second straight-line distance between the closest points of the inner surface and the second battery pack 20. Alternatively, to determine if the second condition is met, one can compare the distance from the inner surface of the vehicle body 110 to the center of gravity of the first battery pack 10 to the distance from the inner surface to the center of gravity of the second battery pack 20 to the same point.

[0103] Thus, the first battery pack 10f is positioned closer to the inner surface of the vehicle body 110 than the second battery pack 20. In other words, because the second condition is met, the first battery pack 10 can be easily replaced from the inner surface of the vehicle body 110. This provides a mobile vehicle with superior replaceability of the first battery pack 10.

[0104] Since the first opening 111f is located on the inner surface of the vehicle body 110f, the first battery pack 10f can be easily replaced from the inner surface of the vehicle body 110f via the first opening 111f. In particular, since the first opening 111f is provided on the inner surface of the vehicle body 110f, it is possible to prevent rainwater and other liquids from entering the first opening 111f.

[0105] The interior surface of the vehicle body 110f includes the interior surface of the passenger compartment (floor, interior walls, interior ceiling, etc.), the surface of the seats, the interior surface of the trunk, etc.

[0106] (Example 7) Figure 15 is an explanatory diagram showing a vehicle 100G, which is an example of a mobile body according to Modification 7. As shown in Figure 15, the vehicle 100G may be equipped with a work unit 190 for performing battery replacement work, etc. The work unit 190 usually performs predetermined work by mechanical movement such as a manipulator, piston, or spring, but the operation by the work unit 190 is not limited to the use of mechanical force involving contact, but may also utilize electric force or magnetic force. Specifically, it may utilize electromagnets, magnets, or static electricity. For battery replacement work, a manipulator, piston, spring, etc. can be used. Figure 15 shows a manipulator as an example of the work unit 190, but it is not limited to this. For example, it may be a crane or other device that performs transport work, or a device that performs suction or towing work. It may also be a rail that extends to the battery pack located outside the vehicle 100G. Furthermore, the work unit 190 may be composed of multiple work units. For example, it may have both a manipulator and a drilling work unit. In summary, the work unit only needs to be configured such that at least one work unit element is capable of performing battery replacement work. This makes it easier to replace the first battery pack 10 if it is replaceable.

[0107] [others] The mobile bodies relating to this disclosure have been described above based on embodiments, but this disclosure is not limited to these embodiments. Without departing from the spirit of this disclosure, various modifications to the embodiments that a person skilled in the art could conceive, as well as other forms constructed by combining components from different embodiments, are also included in the scope of this disclosure.

[0108] For example, the first battery pack may contain a solid electrolyte. In this case, if the moving object is subjected to an impact, the battery containing the solid electrolyte can absorb the impact, thereby improving safety.

[0109] When using a solid electrolyte, the installation of separators and spacers becomes unnecessary. Furthermore, because the battery can be solidified, the risk of leakage is reduced, further improving safety.

[0110] As the solid electrolyte, known materials such as lithium ion conductors, sodium ion conductors, or magnesium ion conductors can be used. The solid electrolyte can be an inorganic material such as a sulfide-based, oxide-based, or halide-based solid electrolyte, or a polymer material such as a PEO (polyethylene oxide)-based solid electrolyte.

[0111] Examples of lithium-containing sulfides that can be used as sulfide-based solid electrolytes include Li2S-P2S5, Li2S-SiS2, Li2S-B2S3, Li2S-GeS2, Li2S-SiS2-LiI, Li2S-SiS2-Li3PO4, Li2S-Ge2S2, Li2S-GeS2-P2S5, and Li2S-GeS2-ZnS systems.

[0112] Examples of oxide-based solid electrolytes include lithium-containing metal oxides such as Li2O-SiO2 and Li2O-SiO2-P2O5, and Li x PyO 1-z Lithium-containing metal nitrides such as N2, lithium phosphate (Li3PO4), and lithium-containing transition metal oxides such as lithium titanium oxide can be used. As the solid electrolyte, only one of these materials may be used, or two or more of these materials may be used in combination.

[0113] The first battery pack may contain an electrolyte. If the first battery pack 10 is replaceable, then by replacing it with a first battery pack 10 of higher capacity, longer distances can be covered.

[0114] The electrolyte solution comprises a solvent and an electrolyte. The solvent for the electrolyte solution is preferably an aprotic organic solvent, such as ethylene carbonate (EC), propylene carbonate (PC), butylene carbonate, chloroethylene carbonate, vinylene carbonate, γ-butyrolactone, γ-valerolactone, dimethyl carbonate (DMC), diethyl carbonate (DEC), ethyl methyl carbonate (EMC), methyl formate, methyl acetate, ethyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, 1,3-dioxane, 1,4-dioxane, dimethoxyethane (DME), dimethyl sulfoxide, diethyl ether, methyl diglyme, acetonitrile, benzonitrile, tetrahydrofuran, sulfolane, sultone, etc., or two or more of these in any combination and ratio.

[0115] Furthermore, by using one or more flame-retardant and non-volatile ionic liquids (room-temperature molten salts) as the solvent for the electrolyte, it is possible to prevent the secondary battery from rupturing or catching fire even if the internal temperature rises due to internal short circuits or overcharging. Ionic liquids consist of cations and anions, and include organic cations and anions. Examples of organic cations used in the electrolyte include aliphatic onium cations such as quaternary ammonium cations, tertiary sulfonium cations, and quaternary phosphonium cations, as well as aromatic cations such as imidazolium cations and pyridinium cations. Examples of anions used in the electrolyte include monovalent amide anions, monovalent methide anions, fluorosulfonic acid anions, perfluoroalkyl sulfonate anions, tetrafluoroborate anions, perfluoroalkyl borate anions, hexafluorophosphate anions, or perfluoroalkyl phosphate anions.

[0116] Furthermore, examples of electrolytes to be dissolved in the above solvent include LiPF6, LiClO4, LiAsF6, LiBF4, LiAlCl4, LiSCN, LiBr, LiI, Li2SO4, and Li2B. 10 Cl 10 Li2B12 Cl 12 Lithium salts such as LiCF3SO3, LiC4F9SO3, LiC(CF3SO2)3, LiC(C2F5SO2)3, LiN(CF3SO2)2, LiN(C4F9SO2)(CF3SO2), and LiN(C2F5SO2)2 can be used individually or in any combination and ratio of two or more of these salts.

[0117] Furthermore, the first battery pack may also include a semi-solid battery. In this case, if the moving object is subjected to an impact, the semi-solid battery can absorb the impact, thereby improving safety.

[0118] Furthermore, using semi-solid batteries enhances safety against leakage and other issues. It also allows for thinner and lighter battery packs.

[0119] A semi-solid battery is a battery that contains a semi-solid electrolyte. A semi-solid electrolyte refers to a dry (or intrinsic) polymer electrolyte or a polymer gel electrolyte. Here, "semi-solid" does not mean that the ratio of solid material is 50%. A semi-solid means that it possesses solid properties such as small volume change, while also having some liquid-like properties such as flexibility. As long as these properties are met, it may be a single material or a combination of materials.

[0120] As the polymer gel electrolyte, silicone gel, acrylic gel, acrylonitrile gel, polyethylene oxide-based gel, polypropylene oxide-based gel, fluorine-based polymer gel, etc., can be used.

[0121] As the dry polymer electrolyte, for example, polymers having a polyalkylene oxide structure such as polyethylene oxide (PEO), PVDF, polyacrylonitrile, and copolymers containing these can be used. For example, PVDF-HFP, which is a copolymer of PVDF and hexafluoropropylene (HFP), can be used. Furthermore, the polymer formed may have a porous structure.

[0122] The second battery pack may contain a solid electrolyte. This allows for the installation of a second battery pack containing a non-flammable solid electrolyte, thereby improving safety. The same materials as those described for the first battery pack can be used for the solid electrolyte.

[0123] Furthermore, the second battery pack may contain an electrolyte. This allows the second battery pack containing the electrolyte to be positioned further away from the outer surface of the mobile body compared to the first battery pack, thus reducing the likelihood of external impacts affecting the second battery pack and improving safety. The same materials as those described for the first battery pack can be used for the electrolyte.

[0124] The second battery pack may include a semi-solid battery. This allows for the use of a semi-solid battery that is less prone to ignition, thus improving safety. The same type of semi-solid battery used in the first battery pack can be used.

[0125] Furthermore, the first battery pack may be a battery containing a solid electrolyte, while the second battery pack may be a battery containing a liquid electrolyte. This allows the second battery pack containing the liquid electrolyte to be positioned further away from the outer surface of the moving object compared to the first battery pack. As a result, external shocks are absorbed by the first battery pack, and the shocks are less likely to be transmitted to the second battery pack. Therefore, safety is further improved.

[0126] Furthermore, "batteries containing a solid electrolyte" may refer to all-solid-state batteries where all electrolytes are solid, or solid-state batteries that partially contain a solid electrolyte. All-solid-state batteries offer a lower risk of ignition and combustion when subjected to impact, thus improving safety.

[0127] Furthermore, the above embodiments may be modified, replaced, omitted, or otherwise altered within the scope of the claims or their equivalents.

[0128] Furthermore, if the first battery pack is replaceable, the first opening may have a tapered shape with the widest opening. If the first opening has such a shape, the first battery pack can be easily replaced in the first opening 111.

[0129] If the first battery pack is replaceable, it may have a tapered shape. A tapered shape makes it easier to replace the first battery pack.

[0130] Furthermore, the first battery pack and the first opening may have corresponding tapered shapes. In this case, the first battery pack inserted into the first opening will stop in the appropriate position. In other words, the terminals of the first battery pack can be aligned with the terminals of the vehicle body. This reduces problems such as the first battery pack not conducting electricity.

[0131] Furthermore, if the first battery pack is replaceable, a guide portion may be provided in the vehicle body where the first battery pack is installed to guide the first battery pack to the appropriate position. This makes it easier to replace the first battery pack. The guide portion may be shaped to interlock with the structure provided on the first battery pack, or it may be shaped to conform to the structure provided on the first battery pack.

[0132] Furthermore, if the first battery pack is replaceable, it may be replaced by inserting it from below the vehicle body. This minimizes the height to which the first battery pack needs to be lifted, thus allowing for safer replacement of the first battery pack.

[0133] Furthermore, if the first battery pack is replaceable, it may be inserted from the side of the vehicle body and replaced. This allows for easier replacement of the first battery pack, as it can be inserted while being visually inspected.

[0134] Furthermore, when charging the first and second battery packs, the second battery pack may be charged before the first battery pack. For example, if the first battery pack is replaceable, its charge level can be restored by replacement. During this replacement process, the second battery pack can be charged while still mounted in the vehicle body 110, which can result in a shorter charging time.

[0135] Furthermore, the first battery pack may also be used as a power source on its own. This would allow it to be used, for example, as a power source for daily life during emergencies. [Industrial applicability]

[0136] This disclosure is applicable to mobile devices equipped with multiple battery packs for driving motors. [Explanation of symbols]

[0137] 10, 10a, 10b, 10c, 10d, 10e, 10f First Battery Pack 11 Laura Terminals 12, 12a, 102, 102b 13a Outer casing 14a opening 15a Lid 19a Pack Main Unit 20 Second battery pack 30 switches Vehicles 100, 100C, 100D, 100E, 100F, 100G 101 Cabin 110, 110b, 110e, 110f Vehicle Body 111, 111f First opening 112 Second opening 113 Second lid body 190 Work Unit 200 Hook Mechanism 201 Hook 202 Engaged part 203 Insertion section 300 fixed structure 301 Convex part 302 recess M Motor

Claims

1. The mobile unit body and A first battery pack that can be interchangeably attached to the mobile body, Second battery pack, The mobile body is equipped with a motor for moving the mobile body, The first battery pack and the second battery pack are power sources for driving the motor. The first battery pack is lighter or smaller than the second battery pack. The first battery pack and the second battery pack are built into the mobile body. The first battery pack is positioned closer to the inner surface of the mobile body or closer to the outer surface of the mobile body when viewed from above, compared to the second battery pack. A mobile object.

2. A first opening is formed on the outer surface or the inner surface of the moving body. The first battery pack is positioned closer to the first opening than the second battery pack. The mobile body according to claim 1.

3. The moving body has a second opening formed in a position different from the first opening. The second battery pack is positioned closer to the second opening than the first battery pack. The mobile body according to claim 2.

4. The first opening is located on the inner surface of the movable body. The mobile body according to claim 2 or 3.

5. The first opening is located on the outer surface of the mobile body. The mobile body according to claim 2 or 3.

6. The first battery pack is positioned further forward in the direction of travel of the moving body than the second battery pack. The mobile body according to any one of claims 1 to 3.

7. The first battery pack is positioned further rearward in the direction of travel of the moving body than the second battery pack. The mobile body according to any one of claims 1 to 3.

8. The first battery pack has a smaller charge / discharge capacity than the second battery pack. The mobile body according to any one of claims 1 to 3.

9. The first battery pack is positioned above the second battery pack. The mobile body according to any one of claims 1 to 3.

10. The first battery pack is positioned below the second battery pack. The mobile body according to any one of claims 1 to 3.

11. The first battery pack and the second battery pack are electrically connected in parallel to the motor. The mobile body according to any one of claims 1 to 3.

12. The first battery pack and the second battery pack are electrically switchable and connectable to the motor. The mobile body according to any one of claims 1 to 3.

13. It is an automobile. The mobile body according to any one of claims 1 to 3.

14. The mobile unit body and First battery pack and Second battery pack, The mobile body is equipped with a motor for moving the mobile body, The first battery pack and the second battery pack are power sources for driving the motor. The first battery pack is lighter or smaller than the second battery pack. The first battery pack and the second battery pack are built into the mobile body. The first battery pack is positioned closer to the outer surface of the mobile body when the mobile body is viewed from above than the second battery pack. A mobile object.

Images