JPWO2020017032A1 - Electric vehicle - Google Patents

Abstract

The electric vehicle according to the present invention is a saddle-mounted electric vehicle including an electric motor and a mobile battery unit, and the mobile battery unit includes a battery unit for supplying power to the electric motor, the battery unit, and heat. The electric vehicle includes a heat pipe portion to be replaced and a heat radiating portion connected to the heat pipe portion and exposed on the outer surface of the mobile battery unit, so that the electric vehicle guides the heat of the mobile battery unit to the outside of the vehicle body. Further, a heat conductive member which is a heat conductive member and is provided so as to be in contact with the heat radiating portion is further provided, which makes it possible to improve the mobile battery unit.

Description

The present invention mainly relates to a vehicle body structure of an electric vehicle including a mobile battery unit.

Patent Document 1 describes a vehicle body structure including a battery unit (battery module), heat-dissipating fins fixed at a position away from the battery unit, and a heat pipe connecting them. According to this structure, the heat generated in the battery unit can be released at a position away from the battery unit.

Japanese Unexamined Patent Publication No. 2006-210245

Some electric vehicles are equipped with a removable mobile battery unit. For example, when replacing the mobile battery unit with another mobile battery unit, it may be necessary to remove the mobile battery unit from the vehicle body. In such a case, in the structure of Patent Document 1, it is necessary to remove the heat pipe and the fastener (nut, etc.) for fastening the heat pipe from the battery unit, in order to improve the heat dissipation efficiency of the battery unit and the usability. There was room for structural improvement.

An object of the present invention is to improve the heat dissipation efficiency of the mobile battery unit with a relatively simple configuration while improving the usability in the vehicle body structure including the mobile battery unit.

One aspect of the present invention relates to an electric vehicle, wherein the electric vehicle is a saddle-type electric vehicle including an electric motor and a mobile battery unit, and the mobile battery unit is for supplying electric power to the electric motor. The electric vehicle includes a battery unit, a heat pipe unit that exchanges heat with the battery unit, and a heat radiating unit that is connected to the heat pipe unit and exposed on the outer surface of the mobile battery unit. It is a heat conductive member for guiding the heat of the above to the outside of the vehicle body, and is further provided with a heat conductive member provided so as to be in contact with the heat radiating portion.

According to the present invention, the heat dissipation efficiency of the mobile battery unit can be improved.

It is a schematic diagram for demonstrating an example of a vehicle body structure. It is a front view for demonstrating the example of the structure of the mobile battery unit. It is a side view for demonstrating the example of the structure of the mobile battery unit. It is a rear view for demonstrating the example of the structure of the mobile battery unit. It is a top view for demonstrating the example of the structure of the mobile battery unit. It is a bottom view for demonstrating the example of the structure of the mobile battery unit. It is a schematic diagram for demonstrating an example of a vehicle body structure. It is a schematic diagram for demonstrating an example of a vehicle body structure. It is a schematic diagram for demonstrating an example of a vehicle body structure. It is a schematic diagram for demonstrating an example of the internal structure of a mobile battery unit. It is a schematic diagram for demonstrating an example of the internal structure of a mobile battery unit.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Each figure is a schematic view showing the structure or configuration of the embodiment, and the dimensions of each member shown do not necessarily reflect the actual one. In addition, the same elements are assigned the same reference numbers in each figure, and the description of overlapping contents will be omitted in the present specification.

(First Embodiment)
FIG. 1 is a right side view showing the configuration of the saddle-mounted electric vehicle 1 according to the first embodiment. For ease of understanding, the X direction corresponding to the vehicle body front-rear direction, the Y direction corresponding to the vehicle width direction or the vehicle body left-right direction, and the Z direction corresponding to the vehicle body vertical direction are shown in the figure, respectively. In the following description, expressions such as front / rear, side (left / right), up / down, etc. indicate relative positional relationships with respect to the vehicle body.

In the present embodiment, the electric vehicle 1 is a motorcycle in which a driver (rider) can ride across the vehicle body 100, and includes front wheels 101 and rear wheels 102. A seat 103 on which the driver can sit is provided on the vehicle body 100. The details will be described later, but the seat 103 is provided so as to be openable and closable with respect to the vehicle body 100. In FIG. 1, the vehicle body 100 and the seat 103 are shown by broken lines for the purpose of explaining the internal structure of the electric vehicle 1. The electric vehicle 1 further includes a head pipe 104, a main frame 105, a seat frame 106, a down frame 107, a rear frame 108, a pivot frame 109, and a swing arm 110 in the vehicle body 100.

The electric vehicle 1 further includes a handlebar 111 and a front fork 112. The handlebar 111 is rotatably supported by a head pipe 104 above the front portion of the vehicle body 100. The handlebar 111 is provided with an acceleration operator (accelerator grip), a braking operator (brake lever), and the like, and the driver can use these operators to accelerate, brake, and the like on the electric vehicle 1. .. The front fork 112 rotatably supports the front wheel 101 below the front portion of the vehicle body 100, and is rotatably supported together with the handlebar 111 by the head pipe 104. By rotating the handlebar 111, the driver can change the direction of the front wheels 101 via the front fork 112 and steer.

Although FIG. 1 is a right side view, it is not shown, but in the present embodiment, the main frame 105, the seat frame 106, the down frame 107, the rear frame 108, the pivot frame 109, and the swing arm 110 are left and right, respectively. A pair is provided.

The pair of left and right main frames 105 extend downward from the rear portion of the vehicle body while being separated from the head pipe 104 to the left and right. The seat frame 106 extends from the central portion of the main frame 105 toward the upper rear portion of the vehicle body to support the load applied to the seat 103. The down frame 107 extends below the main frame 105 toward the lower rear portion of the vehicle body while being separated from the head pipe 104 on the left and right, and further extends toward the upper rear portion of the vehicle body and is connected to the seat frame 106. .. The rear frame 108 is erected between the seat frame 106 and the down frame 107, and can support the load applied to the seat 103 together with the seat frame 106.

The head pipe 104, the main frame 105, the seat frame 106, the down frame 107, the rear frame 108, and the pivot frame 109 can be collectively referred to as a vehicle body frame. Various vehicle components in the vehicle body 100 are mainly held in any part of the vehicle body frame. Although the description is omitted or not shown here, a reinforcing material (truss frame or the like) for improving the strength may be additionally installed on the vehicle body frame.

The pivot frame 109 is provided so that the swing arm 110 can swing at the lower portion of the down frame 107. The swing arm 110 rotatably supports the rear wheel 102.

The vehicle body structure is only an example, and the structure may be partially modified / modified so as to be compatible with various vehicle types. For example, in the present embodiment, it has been described that the main frame 105, the seat frame 106, the down frame 107, and the rear frame 108 are provided in pairs on the left and right, but as another embodiment, some / all of them are the vehicle body 100. It may be provided alone in the central portion in the vehicle width direction of the vehicle.

The electric vehicle 1 further includes mobile battery units 120a and 120b, an electric motor 121, and a control device 122. Rechargeable secondary batteries are used in the mobile battery units 120a and 120b, and examples thereof include a lithium ion battery and a nickel hydrogen battery. Here, two mobile battery units 120a and 120b are shown, but the number of mobile battery units may be 1 or 3 or more. In the following description, when the mobile battery units 120a and 120b are not particularly distinguished, they are simply referred to as "mobile battery unit 120".

The mobile battery unit 120 is detachably fixed to the vehicle body frame, and in the present embodiment, is arranged between the pair of left and right seat frames 106, the down frame 107, and / or the rear frame 108. The attachment / detachment of the mobile battery unit 120 is performed at the opening of the above-mentioned seat 103 (seat 103 that can be opened / closed with respect to the vehicle body 100 (see FIG. 1)). For example, a user (driver, owner of electric vehicle 1, maintenance of electric vehicle 1, etc.) rotates the seat 103 to open it as necessary, and moves the mobile battery unit 120 to the vehicle body 100. It can be removed from the vehicle or attached (attached) to the vehicle body 100. Here, it is assumed that the rotation shaft of the seat 103 is provided at the front portion of the seat 103.

The electric motor 121 is substantially supported on the axle of the rear wheel 102 at the rear end of the swing arm 110. The electric motor 121 generates power (rotation) based on the electric power of the mobile battery unit 120 to rotate the rear wheels 102. As the electric motor 121, a known motor such as a three-phase induction motor may be used. Further, the electric motor 121 may be described as a motor unit, a power unit, or the like, including a speed reducer incidentally.

The control device 122 is fixed to the vehicle body frame by a fastener or the like, and is arranged between the pair of left and right down frames 107 in the present embodiment. The control device 122 has a function of converting a DC voltage into an AC voltage and is also called a PDU (power drive unit) or the like, or further has a function of converting an AC voltage into a DC voltage, a function of converting a voltage level, and the like. It is also called a PCU (power control unit) or the like. The control device 122 converts the electric power received from the mobile battery units 120a and 120b via the wire harnesses 91a and 91b into a predetermined mode, and supplies the electric power to the electric motor 121 via the wire harness 92 to the electric motor. The drive control of 121 is performed. The control device 122 can also charge the mobile battery unit 120 by using the electric power generated by the regenerative braking of the electric motor 121.

2A to 2E are schematic views showing the configuration of the mobile battery unit 120, FIG. 2A shows a front view, FIG. 2B shows a side view, FIG. 2C shows a rear view, and FIG. 2D shows a top view ( A plan view) is shown, and FIG. 2E shows a bottom view (bottom view).

The mobile battery unit 120 includes a battery unit 1201, an electrode unit 1202, a support unit 1203, a grip unit 1204, a heat pipe unit 1205, and a heat radiating unit 1206. The battery unit 1201 is provided in the housing 1200 of the mobile battery unit 120 and stores electric power for driving the electric motor 121. The electrode unit 1202 is provided on the bottom surface of the housing 1200, and includes one or more electrodes or terminals capable of extracting electric power from the battery unit 1201. One end of the wire harness 91a or 91b (see FIG. 1) described above is connected to the electrode portion 1202.

As can be seen from FIG. 2E, a plurality of support portions 1203 (here, four) are provided so as to surround the electrode portions 1202 on the bottom surface of the housing 1200. As a result, the electrode portion 1202 can be prevented from being damaged when the mobile battery unit 120 is placed on the ground or the like. The support portion 1203 may be referred to as a leg portion or the like.

The grip portion 1204 is provided on the upper surface of the housing 1200 and can be gripped by the user. The user can use the grip 1204 to remove (and then carry) the mobile battery unit 120 from the vehicle body 100, attach the mobile battery unit 120 to the vehicle body 100, or replace it with another mobile battery unit 120. it can.

The heat pipe portion 1205 contains water as a cooling medium inside the heat pipe portion 1205, and extends in the vertical direction in the housing 1200. The heat radiating portion 1206 is a member connected to the heat pipe portion 1205 and is exposed on the upper surface of the housing 1200. In the present embodiment, the heat pipe portion 1205 is further extended along the upper surface of the housing 1200 in the upper portion of the housing 1200, and is included in the heat radiating portion 1206 in this portion. A metal having a relatively high thermal conductivity (for example, iron, aluminum, an alloy thereof, etc.) is used for the heat radiating unit 1206. The water as a cooling medium in the heat pipe section 1205 receives heat from the battery section 1201 and evaporates toward the heat dissipation section 1206, and then is cooled and liquefied by the heat radiation in the heat dissipation section 1206. With such a structure, the heat pipe section 1205 exchanges heat with the battery section 1201. In this embodiment, a pair of heat pipe portions 1205 and heat radiating portions 1206 are provided on both sides of the grip portion 1204.

According to the structure of the mobile battery unit 120 as described above, the heat generated by using the electric power of the battery unit 1201 is collected in the heat radiating unit 1206 via the heat pipe unit 1205.

FIG. 3 is a schematic diagram for explaining other components of the electric vehicle 1. Here, the frames 105 to 109 are not shown in order to make the figure easier to see. As shown in FIG. 3, the electric vehicle 1 further includes a heat conductive member 130, a heat exchanger 131, and a connecting portion 132.

The heat conductive member 130 is provided at the lower part of the seat 103 that can be opened and closed with respect to the vehicle body 100, and rotates together with the seat 103 according to the opening and closing of the seat 103. When the sheet 103 is closed (that is, in the state of FIG. 3), the heat conductive member 130 presses the upper surface of the housing 1200 of the mobile battery unit 120 and comes into contact with the heat radiating unit 1206. In the present embodiment, a metal having a relatively high thermal conductivity (for example, iron, aluminum, an alloy thereof, etc.) is used for the heat conductive member 130. The heat generated in the battery unit 1201 and collected in the heat radiating unit 1206 via the heat pipe unit 1205 propagates to the heat conductive member 130 when the heat radiating unit 1206 and the heat conductive member 130 come into contact with each other.

In the present embodiment, the two mobile battery units 120a and 120b are arranged side by side in the front-rear direction of the vehicle body in an inclined posture. Therefore, the upper surfaces of the mobile battery units 120a and 120b form a step, and the heat radiating portions 1206 thereof are not aligned in a straight line. Therefore, in the present embodiment, the heat conductive member 130 extends in the front-rear direction of the vehicle body and forms a stepped portion, and engages with both the mobile battery units 120a and 120b at the stepped portion.

Regarding the contact surface between the heat radiating unit 1206 and the heat conductive member 130, the upper surface of the heat radiating unit 1206 and the lower surface of the heat conductive member 130 are flat surfaces in this embodiment, but are provided in a wavy or uneven shape as another embodiment. May be done. In this case, the contact surface between the heat radiating unit 1206 and the heat conductive member 130 can be enlarged, and the heat propagation efficiency from the heat radiating unit 1206 to the heat conductive member 130 can be improved. Further, since the heat conductive member 130 presses the mobile battery unit 120 when the seat 103 is closed, it also has a function of fixing or locking the position of the mobile battery unit 120. Therefore, when the contact surface between the heat radiating portion 1206 and the heat conductive member 130 is wavy or uneven, the misalignment of the mobile battery unit 120 can be appropriately suppressed.

In the present embodiment, the heat exchanger 131 is a heat sink (heat dissipation fin) and is arranged behind the vehicle body 100. The connecting portion 132 connects the heat conductive member 130 and the heat exchanger 131. In this embodiment, the heat exchanger 131 and the connecting portion 132 are integrally molded, and a metal having a relatively high thermal conductivity (for example, iron, aluminum, an alloy thereof, etc.) is used for them.

Here, when the electric vehicle 1 is traveling, a negative pressure is generated behind the vehicle body 100. Therefore, the heat propagated from the heat radiating portion 1206 of the mobile battery unit 120 to the heat conductive member 130 is transferred to the heat exchanger 131 via the connecting portion 132 and then appropriately discharged to the outside of the vehicle body 100.

Further, in this embodiment, the heat exchanger 131 is located above the rear wheels 102. Therefore, during traveling, the wind generated by the rotation of the rear wheels 102 hits the heat exchanger 131, and the heat propagated from the heat radiating unit 1206 of the mobile battery unit 120 to the heat conductive member 130 is more appropriately released to the outside of the vehicle body 100. It becomes.

In the present embodiment, the heat exchanger 131 and the connecting portion 132 are fixed to the vehicle body 100, and the heat conductive member 130 and the connecting portion 132 are connected when the seat 103 is closed and separated when the seat 103 is opened. It shall be configured as follows. In another embodiment, the heat exchanger 131 and the connecting portion 132 may be fixed to the seat 103 integrally with the heat conductive member 130.

Further, as described above, a pair of heat radiating portions 1206 are provided on both sides of the grip portion 1204 (see FIG. 2D). In other words, the grip portion 1204 is provided at a position shifted from the heat radiating portion 1206 in the top view (plan view). Therefore, when the mobile battery unit 120 is attached to the vehicle body 100 and the seat 103 is closed, the heat conductive member 130 can come into contact with the heat radiating portion 1206 without interfering with the grip portion 1204. Further, when removing the mobile battery unit 120, the user can grip the grip portion 1204 without touching the heat radiating portion 1206.

As described above, according to the present embodiment, the heat radiating portion 1206 connected to the heat pipe portion 1205 is exposed and provided on the upper surface of the mobile battery unit 120. Then, a heat conductive member 130 for guiding the heat of the mobile battery unit 120 to the outside of the vehicle body 100 is provided so as to be in contact with the heat radiating portion 1206. In the present embodiment, when the mobile battery unit 120 is attached and the seat 103 is closed, the heat conductive member 130 comes into contact with the heat radiating portion 1206. As a result, the heat generated in the mobile battery unit 120 is guided from the heat radiating unit 1206 toward the outside of the vehicle body 100 via the heat conductive member 130. Therefore, according to the present embodiment, it is possible to improve the usability by using the detachable mobile battery unit 120 and improve the heat dissipation efficiency of the mobile battery unit 120 with a relatively simple configuration.

(Second Embodiment)
In the above-described first embodiment, the vehicle body structure in which the heat exchanger 131 is arranged behind the vehicle body 100 is illustrated, but the heat dissipation path from the mobile battery unit 120 to the outside of the vehicle body 100 is not limited to this example. For example, the heat exchanger may be arranged in front of the vehicle body or on the side of the vehicle body. That is, by using the heat conductive member 130, it is possible to deal with various heat dissipation modes of the mobile battery unit 120 regardless of which part of the vehicle body 100 the heat exchanger is arranged. Hereinafter, the second embodiment will be described as another aspect of the present invention, but the description omitted therein will be incorporated by reference to the contents of the first embodiment.

FIG. 4 shows a schematic diagram for explaining the vehicle body structure of the electric vehicle 1 according to the second embodiment in the same manner as in FIG. 3 (first embodiment). In the present embodiment, the electric vehicle 1 includes a heat exchanger 141, flow path pipes 142a, 142b and 142c, and an electric pump 143 in place of the heat exchanger 131 and the connection portion 132 of the first embodiment. ..

In the present embodiment, the heat exchanger 141 is a radiator for cooling water as a cooling medium, and is arranged in front of the vehicle body 100. The flow path pipes 142a to 142c are pipes that serve as flow paths for the cooling medium. The flow path pipes 142a and 142b are arranged so as to connect the heat conductive member 130 and the electric pump 143, and among them, the flow path pipe 142a is arranged on the side closer to the heat conductive member 130. The flow path pipe 142c is arranged so as to connect the electric pump 143 and the heat exchanger 141. Although not shown for the sake of readability, the heat exchanger 141 and the heat conductive member 130 are connected by another flow path tube. The electric pump 143 pumps the cooling medium.

With such a configuration, the cooling medium circulates between the heat conductive member 130 and the heat exchanger 141. That is, in the present embodiment, the cooling medium also passes through the heat conductive member 130, in other words, the heat conductive member 130 includes a flow path tube (shown by a dotted line in FIG. 4) which is a flow path of the cooling medium. The heat conductive member 130 may be provided, for example, so that the flow path in the heat conductive member 130 has a meandering shape, whereby the heat of the mobile battery unit 120 can be effectively propagated to the cooling medium. ..

Similar to the first embodiment, the heat conductive member 130 is provided at the lower part of the openable / closable sheet 103, and rotates together with the sheet 103 according to the opening / closing of the sheet 103. Therefore, among the flow path pipes 142a to 142c, at least the flow path pipe 142a may be made of a flexible material or may be made bendable / expandable.

According to the present embodiment, since the heat exchanger 141 is arranged in front of the vehicle body 100, the traveling wind from the front hits the heat exchanger 141 during traveling. Therefore, the heat of the mobile battery unit 120 is guided to the heat exchanger 141 that receives the running wind, and is appropriately released to the outside of the vehicle body 100. Therefore, also in this embodiment, heat dissipation from the mobile battery unit 120 can be effectively realized as in the first embodiment.

Since heat can also be generated in the control device 122 during traveling, the control device 122 may be arranged on the circulation path of the cooling medium, whereby heat dissipation of the control device 122 can be realized. It becomes. Further, in the present embodiment, an embodiment in which water is used as the cooling medium is illustrated, but oil may be used as the cooling medium, and an oil cooler may be used as the heat exchanger 141.

(Third Embodiment)
In the above-described first embodiment, the mode in which the heat radiating portion 1206 of the mobile battery unit 120 is exposed on the upper surface of the housing 1200 is illustrated, but the present invention is not limited to this example, and the heat inside the mobile battery unit 120 is transferred to the housing 1200. It suffices if it can be taken out. That is, the heat radiating portion may be provided exposed on any of the outer surfaces of the housing 1200, and may be provided, for example, on the lower surface (bottom surface), side surface, front surface, or back surface of the housing 1200. Hereinafter, the third embodiment will be described as another aspect of the present invention, but the description omitted therein will be incorporated by reference to the contents of the first to second embodiments.

FIG. 5 shows a schematic diagram for explaining the vehicle body structure of the electric vehicle 1 according to the third embodiment in the same manner as in FIG. 3 (first embodiment). FIG. 6 is a front view showing the configuration of the mobile battery unit (referred to as “mobile battery unit 120 ′” for distinction) mounted on the vehicle body 100 in the present embodiment. In the present embodiment, the heat conductive member 130'is arranged in the lower part of the vehicle body 100 in place of the heat conductive member 130 of the first embodiment, and the mobile battery unit 120'is placed on the heat conductive member 130'. It is installed.

Further, in the present embodiment, the electric vehicle 1 includes a heat exchanger 141, flow path pipes 142c and 142d, and an electric pump 143. The heat exchanger 141, the flow path pipe 142c, and the electric pump 143 are the same as those in the second embodiment, and the flow path pipe 142d is arranged so as to connect the heat conductive member 130'and the electric pump 143. With such a configuration, the cooling medium circulates between the heat conductive member 130'and the heat exchanger 141.

As shown in FIG. 6, the mobile battery unit 120'includes a heat radiating unit 1206' in place of the heat radiating unit 1206 of the first embodiment, and further includes extension units 1207a and 1207b. The heat radiating portion 1206'is provided so as to be exposed on the lower surface of the housing 1200. The extension portion 1207a is connected to the heat pipe portion 1205 in the upper portion of the housing 1200. Specifically, the heat pipe portion 1205 extends along the upper surface of the housing 1200 in the upper portion of the housing 1200 (similar to the first embodiment), and is included in the extending portion 1207a in this portion. The extension portion 1207b extends from the extension portion 1207a through the side portion of the housing 1200 to the lower portion of the housing 1200, and is connected to the heat dissipation portion 1206'. The heat radiating portion 1206'and the extending portions 1207a and 1207b are preferably integrally molded, and a metal having a relatively high thermal conductivity (for example, iron, aluminum, an alloy thereof, etc.) is used for them.

According to the structure of the mobile battery unit 120', the heat generated by using the electric power of the battery unit 1201 is collected in the heat radiating unit 1206' via the heat pipe unit 1205 and the extension units 1207a and 1207b. Will be done.

When such a mobile battery unit 120'is mounted, the heat conductive member 130'arranged in the lower portion of the vehicle body 100 is placed on the mobile battery unit 120' and comes into contact with the heat radiating unit 1206'. Therefore, the heat generated in the mobile battery unit 120'is guided from the heat radiating portion 1206' to the outside of the vehicle body 100 via the heat conductive member 130'. Therefore, also in this embodiment, the heat dissipation efficiency of the mobile battery unit 120'can be improved with a relatively simple configuration as in the first to second embodiments.

As a mobile battery unit of another embodiment (referred to as "mobile battery unit 120" for distinction), as illustrated in FIG. 7, the heat radiating unit 1206 "is used as a housing instead of the heat radiating unit 1206'. It may be provided so as to be exposed on the side surface of the 1200. Specifically, the heat radiating portion 1206 "extends from the extending portion 1207b toward the outside of the housing 1200 and is exposed. In this example, a member corresponding to the heat conductive member 130 or 130'may be provided so as to press the mobile battery unit 120 "from the side surface and come into contact with the heat radiating unit 1206". Further, by locking the mobile battery unit 120 "from the side with this member, the installation of the mobile battery unit 120" can be completed. Further, according to this example, when the mobile battery unit 120 "has a structure having a relatively large size in the vertical direction, the exposed area of the heat radiating portion 1206" can be increased, and the mobile battery unit 120 "can be increased. The heat dissipation efficiency can be further improved.

Although some preferred embodiments have been illustrated above, the present invention is not limited to these examples, and some of them may be modified or combined without departing from the spirit of the present invention. Further, it goes without saying that the individual terms described in the present specification are used only for the purpose of explaining the present invention, and the present invention is not limited to the strict meaning of the terms. The equivalent may also be included. For example, in the embodiment, a motorcycle is shown as the electric vehicle 1, but the concept of the vehicle includes a motorcycle (including a scooter type vehicle) and three wheels (one front wheel and two rear wheels, or two front wheels and one rear wheel). Vehicles), all-terrain vehicles (ATV) such as four-wheeled buggies, etc. are also included.

(Summary of Embodiment)
The features of the above embodiments are summarized below:
The first aspect relates to an electric vehicle, which is a saddle equipped with an electric motor (for example, 121 in FIGS. 1 and 3 to 5) and a mobile battery unit (for example, 120 in FIGS. 2A to 2E). In a type electric vehicle (for example, 1 in FIG. 1), the mobile battery unit exchanges heat with a battery unit (for example, 1201 in FIG. 2A) for supplying electric power to the electric motor and the battery unit. A heat pipe portion (for example, 1205 in FIG. 2A, etc.) and a heat radiating portion (for example, 1206 in FIG. 2A, etc., 1206'in FIG. 6, FIG. 1206 "), the electric vehicle is a heat conductive member for guiding the heat of the mobile battery unit to the outside of the vehicle body (for example, 100 in FIG. 1 and the like), and is provided so as to be in contact with the heat radiating portion. Further provided with a heat conductive member (for example, 130 in FIGS. 3 to 4 and 130'in FIG. 5).

According to the first aspect, in a vehicle body structure provided with a detachable mobile battery unit, the usability of the vehicle body structure is improved, and the heat dissipation efficiency of the mobile battery unit when the mobile battery unit is attached is improved with a relatively simple configuration. It will be possible.

In the second aspect, the vehicle body is further provided with a seat (for example, 103 in FIG. 1 and the like) that can be opened and closed, the heat radiating portion is exposed on the upper surface of the mobile battery unit, and the heat conductive member is formed by the heat conductive member. It is provided in the lower part of the sheet so as to press the upper surface of the mobile battery unit and come into contact with the heat radiating portion when the sheet is closed (for example, 1206 in FIG. 2A or the like).

According to the second aspect, the vehicle body structure is suitable in a structure in which the seat can be opened and the mobile battery unit can be taken out. Further, according to the second aspect, the mobile battery unit can be fixed or locked by closing the seat.

In the third aspect, the mobile battery unit further includes a grip portion (for example, 1204 in FIG. 2A or the like) on the upper surface thereof, and the grip portion is provided at a position shifted from the heat radiating portion in the top view. ..

According to the third aspect, the mobile battery unit can be gripped when the mobile battery unit is taken out, and the heat conductive member dissipates heat without interfering with the gripped portion when the mobile battery unit is attached and the seat is closed. It becomes possible to contact the part.

In the fourth aspect, the heat radiating portion is exposed on the lower surface of the mobile battery unit, and the heat conductive member has the mobile battery unit mounted on the heat conductive member so as to come into contact with the heat radiating portion. It is located in the lower part of the vehicle body (for example, 1206'in FIG. 6).

According to the fourth aspect, when the mobile battery unit is mounted on the vehicle body, the mobile battery unit comes into contact with the heat conductive member, so that the heat dissipation efficiency of the mobile battery unit can be improved relatively easily. It becomes.

In the fifth aspect, the heat radiating portion is exposed on the side surface of the mobile battery unit, and the heat conductive member presses the side surface of the mobile battery unit and comes into contact with the heat radiating portion. It is located laterally (eg, 1206 ″ in FIG. 7).

According to the fifth aspect, the vehicle body structure can be applied to a structure or the like in which the mobile battery unit is locked from the side to complete the mounting.

In the sixth aspect, a heat exchanger (for example, 131 in FIG. 3 and 141 in FIGS. 4 to 5) for releasing heat transferred from the mobile battery unit through the heat conductive member to the outside of the vehicle body is further provided.

According to the sixth aspect, heat dissipation from the mobile battery unit can be appropriately realized. Examples of the heat exchanger include a heat sink, a radiator, an oil cooler, and the like.

In the seventh aspect, the heat exchanger is arranged at the rear of the vehicle body.

According to the seventh aspect, heat dissipation from the mobile battery unit can be effectively realized due to the negative pressure that may be generated behind the vehicle body during traveling.

In the eighth aspect, the front wheels (eg 101 in FIG. 1 and the like) and the rear wheels (eg 102 in FIG. 1 and the like) are further provided, and the heat exchanger is located above the rear wheels.

According to the eighth aspect, since the wind generated by the rotation of the rear wheels hits the heat exchanger, heat dissipation from the mobile battery unit can be realized more effectively.

In the ninth aspect, the heat exchanger is arranged in front of the vehicle body.

According to the ninth aspect, since the traveling wind from the front hits the heat exchanger, heat dissipation from the mobile battery unit can be effectively realized.

In a tenth aspect, the heat transfer member is made of metal and the heat exchanger is a heat sink (eg 131 in FIG. 3).

According to the tenth aspect, heat dissipation from the mobile battery unit can be realized with a relatively simple configuration.

In the eleventh aspect, an electric pump (for example, 143 in FIGS. 4 to 5) for pumping and circulating the cooling medium is further provided, and the heat conductive member is provided with a flow path of the cooling medium pumped by the electric pump. Includes the flow path tube to be formed.

According to the eleventh aspect, heat dissipation from the mobile battery unit can be realized with a relatively simple configuration. As the heat exchanger, a radiator may be used when the cooling medium is water, and an oil cooler may be used when the cooling medium is oil.

A twelfth aspect relates to an electric vehicle, in which the electric vehicle includes an electric motor (for example, 121 in FIGS. 1 and 3 to 5) and a mobile battery unit (for example, 120 in FIGS. 2A to 2E) is attached / detached. It is a saddle-mounted electric vehicle (for example, 1 in FIG. 1 and the like) that can be configured, and the mobile battery unit includes a battery unit (for example, 1201 in FIG. 2A and the like) for supplying power to the electric motor. A heat pipe section (for example, 1205 in FIG. 2A, etc.) that exchanges heat with the battery section and a heat dissipation section (for example, 1206, FIG. 1206 ′, 1206 ″ in FIG. 7), the electric vehicle is a heat conductive member for guiding the heat of the mobile battery unit to the outside of the vehicle body (for example, 100 in FIG. 1 and the like), and the mobile battery. Further, a heat conductive member (for example, 130 in FIGS. 3 to 4 and 130'in FIG. 5) provided so as to come into contact with the heat radiating portion when the unit is mounted on the vehicle body is further provided.

According to the twelfth aspect, the same effect as the first aspect described above can be realized.

The present invention is not limited to the above embodiments, and various modifications and modifications can be made without departing from the spirit and scope of the present invention. Therefore, in order to make the scope of the present invention public, the following claims are attached.

Claims (12)

A saddle-type electric vehicle (1) including an electric motor (121) and a mobile battery unit (120).
The mobile battery unit is
A battery unit (1201) for supplying electric power to the electric motor, and
A heat pipe section (1205) that exchanges heat with the battery section,
A heat radiating portion (1206, 1206', 1206 ") connected to the heat pipe portion and exposed on the outer surface of the mobile battery unit, and
Including
The electric vehicle is further provided with a heat conductive member (130, 130') which is a heat conductive member for directing the heat of the mobile battery unit to the outside of the vehicle body and which is provided so as to be in contact with the heat radiating portion. Electric vehicle. Further equipped with a seat (103) provided on the vehicle body so that it can be opened and closed.
The heat radiating portion is exposed on the upper surface of the mobile battery unit.
The claim is characterized in that the heat conductive member is provided at the lower part of the sheet so as to press the upper surface of the mobile battery unit and come into contact with the heat radiating portion when the sheet is closed. The electric vehicle according to 1. The mobile battery unit further includes a grip portion (1204) on the upper surface thereof.
The electric vehicle according to claim 2, wherein the grip portion is provided at a position shifted from the heat radiating portion in a top view. The heat radiating portion (1206') is exposed on the lower surface of the mobile battery unit.
The electric vehicle according to claim 1, wherein the heat conductive member is arranged in a lower portion of the vehicle body so that the mobile battery unit is placed on the mobile battery unit and comes into contact with the heat radiating portion. The heat radiating portion (1206 ") is exposed on the side surface of the mobile battery unit.
The electric vehicle according to claim 1, wherein the heat conductive member is arranged on the side surface of the vehicle body so as to press the side surface of the mobile battery unit and come into contact with the heat radiating portion. The invention according to any one of claims 1 to 5, further comprising a heat exchanger (131, 141) that releases heat transferred from the mobile battery unit through the heat conductive member to the outside of the vehicle body. Electric vehicle. The electric vehicle according to claim 6, wherein the heat exchanger is arranged at the rear of the vehicle body. Further equipped with front wheels (101) and rear wheels (102)
The electric vehicle according to claim 7, wherein the heat exchanger is located above the rear wheels. The electric vehicle according to claim 6, wherein the heat exchanger is arranged in front of the vehicle body. The electric vehicle according to any one of claims 6 to 9, wherein the heat conductive member is made of metal, and the heat exchanger is a heat sink (131). Further equipped with an electric pump (143) that pumps and circulates the cooling medium.
The electric vehicle according to any one of claims 6 to 9, wherein the heat conductive member includes a flow path pipe forming a flow path of the cooling medium pumped by the electric pump. A saddle-mounted electric vehicle (1) equipped with an electric motor (121) and having a detachable mobile battery unit (120).
The mobile battery unit is
A battery unit (1201) for supplying electric power to the electric motor, and
A heat pipe section (1205) that exchanges heat with the battery section,
A heat radiating portion (1206, 1206', 1206 ") connected to the heat pipe portion and exposed on the outer surface of the mobile battery unit, and
Including
The electric vehicle is a heat conductive member for guiding the heat of the mobile battery unit to the outside of the vehicle body, and is a heat conductive member provided so as to be in contact with the heat radiating portion when the mobile battery unit is mounted on the vehicle body. An electric vehicle characterized by further comprising (130, 130').

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