JP2009023528A - Motor-driven vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily fix a charger to be arranged between two power accumulating parts in a vehicle body of a motor-driven vehicle, even when a width between the two power accumulating parts is small, and to effectively make the most of a space on a lower side of the charger. <P>SOLUTION: The motor-driven vehicle includes a front mounted battery pack 32 and a rear mounted battery pack 34 to be power accumulating parts arranged on a floor panel 60 constituting a lower side of the vehicle body, and the charger 58. The rear mounted battery pack 34 is arranged in substantially parallel with the front mounted battery pack 32 with a space in the horizontal direction. The charger 58 is capable of charging to at least one of each of the battery packs 32 and 34 from an external AC power supply, is arranged between both of the battery packs 32 and 34, and has a lowest surface 108 located on upper sides of lowest surfaces 104 and 106 of both of the battery packs 32 and 34. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric vehicle including a first power storage unit, a second power storage unit, and a charger.

  For example, an electric vehicle such as a hybrid vehicle or an electric vehicle includes a battery for driving a motor. For example, it is considered that the battery is mounted in a luggage room such as a trunk room at the rear of the automobile, that is, in a lower side of the luggage space.

  On the other hand, in recent years, it has been required to increase the travel distance by the motor of the electric vehicle, and in order to meet this requirement, it corresponds to the first power storage unit that has been considered to be mounted first. In addition to the pre-installed battery, it is considered that a post-installed battery corresponding to another second power storage unit is mounted on the electric vehicle. In addition, a charger equipped with an AC / DC converter is mounted on an electric vehicle so that one or both of the pre-installed battery and the post-installed battery can be supplied with electric power converted into DC voltage from an external AC power supply. It is also considered to do.

  In Patent Document 1, a chassis frame is manufactured by joining a plurality of frame constituent members made of a hollow extruded shape member having a square cross-sectional shape in the vehicle width direction so that the longitudinal direction coincides with the longitudinal direction of the vehicle body. And the installation method of the battery for electric vehicles which accommodates the tray which mounted the battery in the hollow part of a frame structural member is described. In Patent Document 1, a charger for charging a battery is stored in a frame constituent member, and a space formed between a rising portion formed on a side of a tray and the battery is used for installing the charger. It is described that it is provided to.

  In Patent Document 2, the first battery assembly and the second battery assembly are arranged along the left-right direction of the vehicle, and a floating bracket is provided between the first battery assembly and the second battery assembly. A battery assembly mounting structure in which an electric junction box is held by a floating bracket is described.

Japanese Patent Laid-Open No. 10-287138 Japanese Patent Laying-Open No. 2005-297861

  As described above, in the case of mounting a rear-mounted battery and a charger in addition to a pre-mounted battery, which has been conventionally considered, when trying to mount all of these in a narrow space such as a luggage compartment of the vehicle, If the arrangement structure is not devised, the arrangement is difficult. For example, there may be a case where the placement of the pre-installed battery and the post-installed battery substantially parallel to the pre-installed battery in the luggage compartment is determined with priority over the position where the charger is disposed. In this case, if the lower surface of the charger is located at the same position in the vertical direction as the lower surface of both batteries or below it, there is a possibility that the charger cannot be placed between both batteries. .

  For example, as schematically shown in FIG. 15, a case is considered in which both the front-mounted battery 12 and the rear-mounted battery 14 are fixed in an approximately parallel state on the upper side of the vehicle body 10 in the luggage compartment of the electric vehicle. In this case, since the charger 16 has cooling fan and cable lead-out portions at both ends in the length direction (front and back direction in FIG. 15), the width direction (left and right direction in FIG. 15) as illustrated. In many cases, the charger fixing bracket 18 can be attached only on both sides. And when the width W between both the batteries 12 and 14 is small, when it tries to arrange | position and fix the charger 16 low in the vehicle body 10 so that the charger 16 may be arrange | positioned between this, the bracket for bracket fixing 18 may interfere with the batteries 12 and 14 or the battery fixing bracket 20 for attaching them, and the charger 16 may not be fixed to the vehicle body 10.

  In addition, when the charger 16 cannot be disposed between the two batteries 12 and 14 and the charger 16 is disposed at a position far away from the batteries 12 and 14, the charger 16 and any one of the batteries 12 are disposed. , 14 and other cables (not shown) such as a high voltage cable become excessively long, and it cannot be said that there is no possibility that the handling of the cables becomes a problem.

  Further, if the lower surface of the charger 16 is located at the same position in the vertical direction as the lower surfaces of the batteries 12 and 14 or below the lower surface, it may be difficult to effectively use the space below the charger 16. There is sex. For example, a step-up converter (not shown) for boosting the voltage from the batteries 12 and 14 and a connection part of a piping for cooling the boost converter are connected to the batteries 12 and 14 in a space in which the batteries 12 and 14 are arranged, such as a luggage compartment. It is conceivable to arrange it on the lower side. However, if the charger 16 is arranged at a low position, it becomes difficult to set the arrangement position of the cooling pipe, for example. For this reason, it may be difficult to effectively use the space below the charger 16.

  On the other hand, in the case of the method for installing a battery for an electric vehicle described in Patent Document 1, even when the width between two parallelly arranged batteries is reduced, a charger is provided between the two batteries. In order to be able to install the battery, it is not disclosed to devise the arrangement relationship between the battery and the charger.

  Further, in the case of the mounting structure of the battery assembly described in Patent Document 2, it is not disclosed that the arrangement relationship between the battery and the charger is devised, and a charger is provided between the two batteries. Even the placement is not disclosed.

  In such a method or structure described in Patent Document 1 and Patent Document 2, when the width between power storage units such as two batteries is small in an electric vehicle, a charger is provided between the two power storage units. There is a possibility that the charger cannot be fixed to the vehicle body.

  An object of the present invention is to make it easy to fix a charger so as to be disposed between two power storage units on a vehicle body even when the width between two power storage units is small in an electric vehicle. The purpose is to facilitate effective use of the lower space.

  In the electric vehicle according to the present invention, the first power storage unit, the second power storage unit disposed so as to be parallel to the first power storage unit with a horizontal space with respect to the first power storage unit, and the first power storage unit And a charger that is connected to at least one power storage unit side of the second power storage unit and that allows charging from at least one power storage unit of the first power storage unit and the second power storage unit from an external power source. The charger is disposed between the first power storage unit and the second power storage unit, and has a lowermost surface positioned above the lowermost surfaces of both the first power storage unit and the second power storage unit. It is an electric vehicle.

  Preferably, the charger has an uppermost surface located below the uppermost surface of at least one of the first power storage unit and the second power storage unit.

  More preferably, a power storage unit side bracket for fixing the first power storage unit or the second power storage unit to the vehicle body is provided below the lowermost surface of the charger in the vertical direction.

  More preferably, when the power storage unit side bracket and the charger are viewed from above, at least a part of the power storage unit side bracket overlaps with the charger.

  More preferably, a pipe disposed between the lower surface of the charger and the upper surface of the vehicle body is provided.

  More preferably, the piping is disposed below the first power storage unit or the second power storage unit, and the cooling air is supplied to the boost converter that boosts the voltage from the first power storage unit or the second power storage unit. Use cooling piping.

  More preferably, the vehicle body side bracket and the charger side bracket include a vehicle body side bracket for fixing the first power storage unit or the second power storage unit to the vehicle body, and a charger side bracket fixed directly to the charger. And are integrally connected.

  More preferably, the charger and the charger-side bracket are coupled at an end portion on the side facing at least one of the first power storage unit and the second power storage unit of the charger, The vehicle body side bracket is connected to the charger side bracket at a portion protruding in a direction parallel to the length direction of the first power storage unit and the second power storage unit from the charger.

  More preferably, a power storage unit side bracket is directly fixed to each of the first power storage unit and the second power storage unit, and the first power storage unit or the second power storage unit is fixed to the vehicle body via the vehicle body side bracket. The vehicle body side bracket is fixed to the vehicle body at a coupling portion between the power storage unit side bracket fixed to at least one of the first power storage unit and the second power storage unit and the vehicle body side bracket.

  According to the electric vehicle according to the present invention, the charger is disposed between the first power storage unit and the second power storage unit, and is the uppermost position located above the lowermost surfaces of both the first power storage unit and the second power storage unit. Since it has a lower surface, even when the width between the first power storage unit and the second power storage unit is small, the power storage unit side bracket, the charger, and the charger for fixing the first power storage unit and the second power storage unit to the vehicle body Can be easily prevented from interfering with the charger-side bracket for attaching to the vehicle body. For this reason, even when the width between the two power storage units is small, the charger can be easily fixed to the vehicle body so as to be disposed between the two power storage units. In addition, it is easy to arrange the parts below the charger, and it is easy to effectively use the space below the charger.

  In addition, according to the configuration in which the charger has a top surface located below the top surface of at least one of the first power storage unit and the second power storage unit, the upper part of the charger is the top of one power storage unit. Protruding upward from the upper surface can be prevented. For this reason, it becomes easy to plan the effective use of the space above the power storage unit, such as making it easy to place a flat carrier plate or the like on the upper side of one power storage unit.

  Further, according to the configuration including the pipe disposed between the lower surface of the charger and the upper surface of the vehicle body, the lowermost surface of the charger is positioned above the lowermost surfaces of both the first power storage unit and the second power storage unit. This makes it easier to make effective use of the space that is created.

  Also, a vehicle body side bracket for fixing the first power storage unit or the second power storage unit to the vehicle body, and a charger side bracket fixed directly to the charger, the vehicle body side bracket and the charger side bracket are integrated. According to the configuration coupled to the battery charger, unlike the case where the charger is directly fixed to the vehicle body by the bracket directly attached to the charger, the operation of fixing the charger to the vehicle body can be easily performed.

  In addition, the charger and the charger side bracket are coupled at an end of the charger facing the power storage unit of at least one of the first power storage unit and the second power storage unit, and the charger side bracket and the vehicle body side bracket In the charger side bracket, the first power storage unit and the second power storage unit are coupled to each other at a portion protruding in a direction parallel to the length direction of the first power storage unit and the second power storage unit. Even when the width between the power storage unit is small, the work of fixing the charger to the vehicle body between the first power storage unit and the second power storage unit can be performed more easily. That is, when fixing the charger to the vehicle body, the charger side bracket is fixed to the charger, and after fixing the vehicle body side bracket to the vehicle body, the first power storage unit and the 2 If the charger side bracket and the vehicle body side bracket are fixed at a portion protruding in a direction parallel to the length direction of the power storage unit, the fixing operation between the charger side bracket and the vehicle body side bracket can be It can be performed in a wide space outside the narrow space between. For this reason, even when the width | variety between a 1st electrical storage part and a 2nd electrical storage part is small, the operation | work which fixes a charger to a vehicle body between a 1st electrical storage part and a 2nd electrical storage part can be performed more easily.

  In addition, a power storage unit side bracket is directly fixed to each of the first power storage unit and the second power storage unit, and the first power storage unit or the second power storage unit is fixed to the vehicle body via the vehicle body side bracket, According to the configuration in which the vehicle body side bracket is fixed to the vehicle body at the coupling portion between the power storage unit side bracket fixed to at least one power storage unit of the first power storage unit and the second power storage unit and the vehicle body side bracket. And the charging part can be reduced in weight by reducing the number of connecting parts when fixing to the vehicle body, and the number of assembling steps can be reduced.

[First Embodiment]
Hereinafter, a first embodiment according to the present invention will be described with reference to FIGS. FIG. 1 is a schematic circuit diagram of a motor control device for a hybrid vehicle which is an electric vehicle according to the present embodiment. FIG. 2 is a schematic diagram illustrating a state in which a charger is disposed between a first battery pack and a rear battery pack (add-on battery pack), which are a first power storage unit and a second power storage unit, respectively. FIG. 3 is a perspective view of a rear mounting bracket (add-on bracket) which is a vehicle body side bracket. FIG. 4 is a schematic exploded view, partly in section, showing a state in the middle of fixing the first battery pack and the rear battery pack to the vehicle body. FIG. 5 is a perspective view showing a state in the middle of arranging the rear mounting bracket so as to avoid the rear mounting boost converter (add-on boost converter) and the cooling pipe after the first mounting battery pack is arranged on the vehicle body. . 6 is a partially enlarged view of FIG. 5 showing a state after the rear mounting bracket is arranged on the vehicle body after the state of FIG. FIG. 7 is a schematic diagram showing a state in the middle of disposing the charger between the first battery pack and the rear battery pack. FIG. 8 is a perspective view of the charger side bracket. FIG. 9 is a schematic perspective view for explaining a portion for attaching the charger side bracket to the charger. FIG. 10 is a perspective view showing a state where the charger side bracket is attached to the charger. FIG. 11 is a view from above of FIG. FIG. 12 is a perspective view showing a state in the middle of installing the charger and the rear mounted battery pack from above after the front mounted battery pack and the rear mounted bracket are installed on the vehicle body. FIG. 13 is a view of a state in which the first battery pack, the rear battery pack, and the charger are arranged on the vehicle body as viewed from above.

  As shown in FIG. 1, a hybrid vehicle that is an electric vehicle includes an engine (not shown), a generator (MG1) 22 that is a first motor generator, and a travel motor (MG2) 24 that is a second motor generator. Prepare.

  The hybrid vehicle drives a wheel (not shown) using at least one of the engine and the travel motor 24 as a travel power source. The generator 22 is a three-phase AC motor and can also be used as an engine starting motor. Moreover, the traveling motor 24 is a three-phase AC motor, and can also be used as a generator, that is, for power regeneration. In the present embodiment, the electric vehicle is a hybrid vehicle, but the present invention can also be implemented in an electric vehicle that uses only a traveling motor driven by a battery as a traveling power source.

  The driving states of the generator 22 and the travel motor 24 are controlled by the control unit 26 via the generator inverter (MG1 inverter) 28 or the travel motor inverter (MG2 inverter) 30, respectively. The control unit 26 outputs drive control signals for the generator 22 and the travel motor 24 to the inverters 28 and 30, respectively. The inverters 28 and 30 output the generator 22 and the travel motor 24 based on the drive control signal. Drive each one.

  The motor control device 31 included in the hybrid vehicle includes, in addition to the power generator 22, the traveling motor 24, the control unit 26, and the inverters 28 and 30, the first battery pack 32 that is the first power storage unit, and the second power storage unit. The rear mounted battery pack 34, the system relays 36, 38, 40, 42, the first capacitor 44, the second capacitor 46, the third capacitor 48, the first mounted boost converter 50, and the rear mounted boost converter 52 are provided.

  In the present embodiment, the front mounted battery pack 32 and the rear mounted battery pack 34 are used as the drive source of the travel motor 24, so that the travel motor is more effective than the case where only the front mounted battery pack 32 is used as the drive source. 24, the travel distance of the hybrid vehicle can be increased. That is, in the past, it was considered that only the pre-installed battery pack 32 was used as the drive source of the traveling motor 24, but in the present embodiment, the pre-installed battery pack 32 and the post-installed battery pack 34 Both are used as drive sources for the travel motor 24.

  In addition, one or both of the pre-installed battery pack 32 and the post-installed battery pack 34 can be charged from an external AC power supply 54 that is an external power supply. The first capacitor 44 and the first boost converter 50 can be connected to the first battery pack 32 side. Further, the third capacitor 48 and the post-mounted boost converter 52 can be connected to the rear-mounted battery pack 34 side.

  The pre-mounted boost converter 50 can boost the DC voltage supplied from the first capacitor 44 and supply it to the second capacitor 46. That is, the first capacitor 44 smoothes the DC voltage supplied from the pre-installed battery pack 32 and supplies the smoothed DC voltage to the pre-installed boost converter 50. The system relays 36 and 38 on the pre-installed battery pack 32 side are turned on or off by a signal from the control unit 26.

  The post-mounted boost converter 52 can boost the DC voltage supplied from the third capacitor 48 and supply it to the second capacitor 46. That is, the third capacitor 48 smoothes the DC voltage supplied from the rear mounted battery pack 34 and supplies the smoothed DC voltage to the rear mounted boost converter 52. The system relays 40 and 42 on the rear mounted battery pack 34 side are also turned on or off by a signal from the control unit 26. The pre-installed battery pack 32 and the post-installed battery pack 34 are secondary batteries such as nickel metal hydride batteries or lithium ion batteries, and a plurality of unit battery cells are stacked and the unit battery cells are electrically connected in series. It is constituted by. The post-installed battery pack 34 has the same capacity as the pre-installed battery pack 32, but can be different from the capacity of the pre-installed battery pack 32.

  The second capacitor 46 smoothes the DC voltage from one or both of the pre-mounted boost converter 50 and the post-mounted boost converter 52 and passes the smoothed DC voltage to the generator inverter 28 and the travel motor inverter 30. Supply.

  Each of the generator inverter 28 and the traction motor inverter 30 includes a U-phase, V-phase, and W-phase arm (not shown), and each arm includes two IGBTs, transistors, etc. connected in series. Switching elements (not shown), and the midpoint of each arm is connected to the U-phase, V-phase, and W-phase coils of the generator 22 or the traveling motor 24, respectively.

  The generator inverter 28 controlled by the control unit 26 converts the DC voltage from the second capacitor 46 into an AC voltage and drives the generator 22. The traveling motor inverter 30 controlled by the control unit 26 converts the DC voltage from the second capacitor 46 into an AC voltage and drives the traveling motor 24.

  The system relays 40 and 42, the third capacitor 48, and the post-mounted boost converter 52 on the rear mounted battery pack 34 are mounted, that is, set as the rear mounted battery pack 34 is mounted on the hybrid vehicle. Further, as will be described later, a cooling pipe 56 (FIGS. 5 and 6) for cooling the post-mounted boost converter 52 is connected to the post-mounted boost converter 52.

  Further, a charger 58 is connected to both ends of the pre-installed battery pack 32. The charger 58 includes an AC / DC conversion circuit that is an AC / DC conversion unit. A power plug (not shown) for connecting to the external AC power source 54 is connected to the charger 58. FIG. 1 shows a state in which a power plug is connected to an external AC power supply 54. The charger 58 converts the AC voltage from the AC power supply 54 into a DC voltage, and enables charging of one or both of the pre-installed battery pack 32 and the post-installed battery pack 34 from the AC power supply 54.

  The hybrid vehicle, which is an electric vehicle according to the present embodiment, is charged between the front-mounted battery pack 32 and the rear-mounted battery pack 34 in the luggage compartment at the rear of the vehicle body in such a configuration having the motor control device 31. The device 58 can be arranged. That is, as schematically shown in FIG. 2, the front-mounted battery pack 32 and the rear-mounted battery pack 34 have both batteries on the floor panel 60 that forms the lower side of the vehicle body in the luggage compartment at the rear of the hybrid vehicle. The packs 32 and 34 are arranged so as to be substantially parallel. That is, with respect to the front-mounted battery pack 32 fixed on the floor panel 60, the rear-mounted battery pack 34 is placed on the floor panel 60 so as to be substantially parallel to each other with a space in the horizontal direction (left-right direction in FIG. 2). Arranged and fixed. For this purpose, the front mounted battery pack 32 is fixed to the floor panel 60 by the front mounted battery side bracket 62 that is the first power storage unit side bracket, and the rear mounted battery side bracket 64 that is the second power storage unit side bracket and The rear mounting battery pack 34 is fixed to the floor panel 60 via the rear mounting bracket 66. A pair of the front-mounted battery side bracket 62 and the rear-mounted battery side bracket 64 are fixed to the both sides of the front-mounted battery pack 32 and the rear-mounted battery pack 34 in the width direction (left-right direction in FIG. 2). In this state, the battery packs 32 and 34 have the same length direction (front and back direction in FIG. 2).

  In FIG. 2, the lower surface of the rear mounted battery pack 34 is positioned slightly above the lower surface of the first mounted battery pack 32, but the same, that is, on the same virtual plane, even if the vertical relations of the lower surfaces are opposite to each other. May be located.

  As shown in detail in FIG. 3, the rear mounting bracket 66 includes a main body portion 68 for fixing the rear mounting battery pack 34 (FIG. 2) and a connecting arm portion having a crank-shaped cross section fixed at two positions of the main body portion 68. 70, 71. The main body 68 includes two parallel pillars 72 and a plurality (two in the drawing) of connecting parts 74 that connect the two pillars 72. The main body 68 is formed with through holes 78 (FIGS. 4 and 13) through which the bolts 76 (FIGS. 4 and 12) for fixing the main body 68 or the rear-mounted battery pack 34 to the vehicle body are passed. is doing.

  As shown in FIG. 3, the connecting arm portions 70, 71 are fixed at two positions in the length direction of the column portion 72 on one side of the two column portions 72 (upper side in FIG. 3). A plurality of (two in the drawing) through-holes 83 are formed in 80 for passing bolts (not shown) for fixing the charger side bracket 82 (FIG. 2). A nut (not shown) is fixed by welding or the like at a position corresponding to the through hole 83 on the lower surface of the top plate 80.

  As shown in FIG. 4, a bolt 84 for fixing the connecting arm portions 70, 71 to the vehicle body is passed through an end portion (left end portion in FIG. 4) opposite to the main body portion 68 of the connecting arm portions 70, 71. A through hole 86 is formed. The top plate portion 80 of each of the connecting arm portions 70 and 71 is located above the main body portion 68.

  The front-mounted battery pack 32 has a bolt 84 inserted into a through hole 88 formed at the lower end of each front-mounted battery side bracket 62 and a nut 92 fixed to the lower surface of the floor panel 60 (FIG. 2). By doing so, it is fixed to the floor panel 60. In this case, as shown in FIG. 4, the rear mounting bracket 66 is connected to the upper side of the mounting plate portion 94 also received by the front mounting battery side bracket 62 fixed to one side (right side of FIG. 4) of the front mounting battery pack 32. The ends of the arm portions 70 and 71 opposite to the main body portion 68 are overlapped. A bolt 84 inserted into a part of the plurality of through holes 88 formed in the attachment plate portion 94, a through hole 86 formed in the connecting arm portions 70 and 71, and a nut 92 fixed to the lower surface of the floor panel 60, Are screwed together. As a result, the rear mounting bracket 66 is fixed to the vehicle body at the joint between the rear mounting bracket 66 and the front mounting battery side bracket 62.

  Further, the rear mounting battery side bracket 64 fixed to both sides of the rear mounting battery pack 34 is placed on the upper side of the main body 68 of the rear mounting bracket 66. In this state, the through hole 95 formed in the rear mounting battery side bracket 64, the bolt 76 inserted through the through hole 78 formed in the main body 68, and the bolt 76 inserted through the through hole 78 are connected to the floor panel 60 (FIG. The rear mounting bracket 66 and the rear mounting battery pack 34 are fixed to the vehicle body by being inserted into a through hole (not shown) formed in the lower surface of 2) and screwed to a nut 92 fixed to the lower surface of the floor panel 60. Yes.

  When such battery-side brackets 62 and 64 or the rear mounting bracket 66 are fixed to the vehicle body, the charger 58 (FIG. 2) is not disposed between the battery packs 32 and 34, so that a wide work space is provided between them. It can be secured. For this reason, even when the width Wa (FIG. 4) between the battery packs 32 and 34 is small, the connecting arm portions 70 and 71 of the rear mounting bracket 66 are not fixed when the brackets 62, 64 and 66 are fixed to the vehicle body. Fixing work can be easily performed by engaging a tool such as a hexagon wrench with the bolts 76 and 84 (FIGS. 4 and 12) from above without causing an excessive hindrance.

  FIG. 5 shows a state immediately before the rear mounting bracket 66 is fixed to the vehicle body. In the floor panel 60, a recessed portion recessed downward is formed in a portion positioned below the rear mounting bracket 66, and the rear mounted boost converter 52 is fixed in the recessed portion. A cooling pipe 56 for supplying cooling air to the rear mounted boost converter 52 is connected to a side surface of the rear mounted boost converter 52 that faces in the horizontal direction, and the cooling pipe 56 is led out from the inside of the recess. The cooling pipe 56 allows cooling air to flow inside. As shown in FIG. 6, in a state where the rear mounting bracket 66 is fixed to the vehicle body and the front mounting battery side bracket 62, a part of the cooling pipe 56 is arranged below at least a part of the connecting arm part 70. I am doing so. That is, a part of the cooling pipe 56 is disposed between the lower surface of some of the connecting arm portions 70 and the upper surface of the floor panel 60. A charger 58 (FIG. 7) is fixed on the upper side of the connecting arm portions 70 and 71. Therefore, a space 110 (FIG. 7) in which the cooling pipe 56 can be disposed is formed between the lower surface of the charger 58 and the upper surface of the floor panel 60. 1 is arranged in a space on the front side of the hybrid vehicle, for example, in a front engine room (not shown).

  Further, as shown in FIG. 7, after fixing the pre-installed battery pack 32 and the post-installed battery pack 34 on the floor panel 60 in the cargo compartment, a charger 58 is installed between the battery packs 32 and 34. The bracket 66 is fixed on the connecting arm portions 70 and 71 of the bracket 66. When performing such a fixing operation, first, the charger side bracket 82 is fixed to the charger 58. In this case, a bolt (not shown) is moved in the direction of arrow α in FIG. 7, and the bolt inserted into the through hole formed in the charger side bracket 82 is fixed to the screw hole of the charger 58 by screw connection. Thereafter, the charger side bracket 82 is moved from above between the battery packs 32 and 34 in the direction of arrow β in FIG. 7, and the charger side bracket 82 is fixed to the connecting arm portions 70 and 71 by screws.

  More specifically, as shown in FIG. 8, the charger side bracket 82 includes a flat bottom plate portion 96, and the length direction (FIG. 8) of both sides of the bottom plate portion 96 in the width direction (left and right direction in FIG. 8). And a mounting plate portion 98 fixed so as to stand up at a plurality of locations (two locations in the figure). The length of the bottom plate portion 96 is made larger than the length of the charger 58 (FIG. 7) (length in the front and back direction in FIG. 7). In addition, in the state where the charger 58 is placed on the bottom plate portion 96, both lengthwise end portions of the bottom plate portion 96 are projected in the length direction from both lengthwise end surfaces of the charger 58, and the projected portions are A through hole 100 in the vertical direction is formed. The through hole 100 is for passing a bolt (not shown) for fixing the charger side bracket 82 (FIG. 7) and the connecting arm portions 70 and 71 (FIG. 7). Further, a horizontal through hole 102 through which a bolt (not shown) for screwing to the charger 58 passes is formed in each mounting plate 98.

  FIG. 9 shows a schematic perspective view of the charger 58. The charger 58 is attached to both ends in the length direction because there are a cooling fan, a cable lead-out portion, a placement portion, a hole for releasing air, etc. at both ends in the length direction of the charger 58. The bracket cannot be attached. For this reason, the charger side bracket 82 (FIG. 8) is screwed to the charger 58 only at both end surfaces in the width direction of the charger 58, which are portions indicated by arrows in FIG.

  10 and 11 show a state where the charger 58 and the charger side bracket 82 are fixed. That is, the charger 58 is placed on the middle portion in the longitudinal direction on the upper side of the charger side bracket 82, and a bolt (not shown) inserted through the through hole 102 formed in the attachment plate portion 98 is used as the charger 58. The charger-side bracket 82 is fixed to the charger 58 by screwing into screw holes (not shown) formed on both end surfaces in the width direction. In this state, as shown in FIG. 11, the through holes 100 at both ends in the length direction of the bottom plate portion 96 of the charger side bracket 82 are formed in a state where the charger 58 and the charger side bracket 82 are viewed from above. The portions protrude in the length direction from both end surfaces in the length direction of the charger 58.

  What fixed the charger 58 and the charger side bracket 82 is mounted on the top plate portion 80 of the connecting arm portions 70 and 71 of the rear mounting bracket 66 as shown in FIG. In this state, the through holes 83 formed in the top plate portion 80 and the through holes 100 (FIGS. 10 and 11) formed in the bottom plate portion 96 (FIGS. 10 and 11) of the charger side bracket 82 are aligned. In FIG. 12, the rear mounting battery pack 34 and the charger 58 are shown to be attached to the rear mounting bracket 66 at the same time, but this is an illustration for facilitating understanding of the shape of the rear mounting bracket 66. Actually, after the rear mounting battery pack 34 is fixed to the rear mounting bracket 66, the charger 58 is fixed to the rear mounting bracket 66. The width Wb of the charger 58 is slightly larger than the width Wc of the top plate portion 80 of the connecting arm portions 70 and 71 of the rear mounting bracket 66 (Wb> Wc).

  As shown in FIG. 13, with the charger 58 disposed between the front-mounted battery pack 32 and the rear-mounted battery pack 34, the through hole 100 of the bottom plate portion 96 of the charger-side bracket 82, and FIG. Further, a bolt (not shown) is inserted through the through hole 83 of the top plate portion 80 of the connecting arm portions 70 and 71, and the bolt is fixed to the lower side of the top plate portion 80 by welding or the like (not shown). Screw on to. Accordingly, as shown in FIG. 13, the charger 58 is fixed to the vehicle body via the charger side bracket 82 and the rear mounting bracket 66. When the charger side bracket 82 and the connecting arm portions 70 and 71 are joined, the length direction of the charger side bracket 82 and the connecting arm portions 70 and 71 is longer than both end surfaces of the charger 58 in the length direction ( A portion protruding in the vertical direction in FIG. 13 may be screw-coupled, and can be easily screwed from above in a wide space using a tool such as a hexagon wrench.

  In the state where the charger 58 is fixed to the vehicle body in this manner, as shown in FIG. 2, the charger 58 is disposed between the first battery pack 32 and the rear battery pack 34, and both battery packs 32. , 34 has a lowermost surface 108 positioned above the lowermost surfaces 104, 106. Further, the charger 58 has an uppermost surface located above the uppermost surfaces of both the battery packs 32 and 34.

  Further, the lower portions of the front mounting battery side bracket 62 and the rear mounting battery side bracket 64 are arranged below the lowermost surface 108 of the charger 58 in the vertical direction. In addition, as shown in FIG. 13, when both the battery side brackets 62 and 64 and the charger 58 are viewed from above, a part of the lower part of the both battery side brackets 62 and 64 facing each other, Are superimposed.

  Further, as shown in FIG. 2, the rear mounted boost converter 52 (FIG. 5) disposed below the rear mounted battery pack 34 between the lowermost surface 108 of the charger 58 and the upper surface of the floor panel 60. 6), a space 110 in which a part of the cooling pipe 56 (FIGS. 5 and 6) for flowing cooling air can be arranged is formed, and a part of the cooling pipe 56 is arranged in the space 110. . Further, the rear mounting bracket 66 and the charger side bracket 82 directly fixed to the charger 58 are integrally coupled and fixed.

  Further, the charger 58 and the charger-side bracket 82 are coupled and fixed at the portions on both sides in the width direction, which are the sides of the charger 58 that face the front-mounted battery pack 32 and the rear-mounted battery pack 34, respectively. The charger side bracket 82 and the rear mounting bracket 66 are parallel to the length direction of the battery packs 32 and 34 (the front and back direction in FIG. 2) with respect to the charger side bracket 82. The battery 58 is coupled and fixed at a portion protruding in the length direction of the charger 58.

  The battery-side brackets 62 and 64 are directly fixed to the battery packs 32 and 34, and the rear mounted battery pack 34 is fixed to the vehicle body via the rear mounted bracket 66. Further, the rear mounting bracket 66 is fixed to the vehicle body at a joint portion between the front mounting battery pack 32 side portion of the rear mounting bracket 66 and the front mounting battery side bracket 62.

  Instead of the rear mounting bracket 66, the bracket has a structure similar to that of the rear mounting bracket 66 or a structure that is symmetrical with respect to a virtual plane orthogonal to the width direction of the rear mounting bracket 66 (left-right direction in FIG. 2). As a first mounting bracket, the first mounting battery pack 32 can be fixed to the vehicle body via the first mounting bracket. In this case, for example, the first mounting bracket and the charger side bracket 82 are integrally coupled and fixed. In this case, the rear mounting battery pack 34 is attached to the vehicle body without any bracket other than the rear mounting battery side bracket 64, or the front mounting bracket is connected to the front mounting bracket and the rear mounting battery side bracket 64 at the joint portion. Can be fixed to the car body. 2 and 7, the vertical relationship at the joint between the front mounting battery side bracket 62 and the rear mounting bracket 66 is different from the vertical relationship shown in FIG. 4 to FIG. It may be.

  According to such a hybrid vehicle, the charger 58 is disposed between the battery packs 32 and 34 and has the lowermost surface 108 positioned above the lowermost surfaces 104 and 106 of both the battery packs 32 and 34. Therefore, even when the width Wa (FIG. 4) between the battery packs 32 and 34 is small, it is easy to prevent the battery side brackets 62 and 64 from interfering with the charger 58 and the charger side bracket 82. it can. For this reason, even when the width Wa between the battery packs 32 and 34 is small, the charger 58 can be easily fixed to the vehicle body so as to be disposed between the battery packs 32 and 34.

  In addition, it is possible to easily dispose the cooling pipe 56 as a component below the charger 58, and it is easy to effectively use the space below the charger 58. Since both the battery packs 32 and 34 and the charger 58 can be arranged in a narrow space in this way, the hybrid vehicle in which only the pre-installed battery pack 32 is mounted among the battery packs 32 and 34, the battery packs 32 and 34, and It is easy to share parts and the vehicle body with the hybrid vehicle equipped with the charger 58.

  Further, since the cooling pipe 56 for cooling the post-mounted boost converter 52 disposed between the lower surface of the charger 58 and the upper surface of the floor panel 60 is provided, the lowermost surface 108 (FIG. 2) of the charger 58 is provided. It becomes easier to effectively use the space generated by positioning the battery packs 32 and 34 above the lowermost surfaces 104 and 106 (FIG. 2).

  The rear mounting bracket 66 or the front mounting bracket and the charger side bracket 82 fixed directly to the charger 58 are provided, and the rear mounting bracket 66 or the front mounting bracket and the charger side bracket 82 are integrally coupled. Therefore, unlike the case where the charger 58 is directly fixed to the vehicle body by the bracket directly attached to the charger 58, the work for fixing the charger 58 to the vehicle body is facilitated.

  Further, the charger 58 and the charger side bracket 82 are coupled at the end of the charger 58 facing the battery packs 32 and 34, and the charger side bracket 82 and the rear mounting bracket 66 are connected to each other. In the side bracket 82, it couple | bonds with the part protruded rather than the charger 58 in the direction parallel to the length direction of each battery pack 32,34. For this reason, even when the width Wa (FIG. 4) between the battery packs 32 and 34 is small, the work of fixing the charger 58 to the vehicle body between the battery packs 32 and 34 can be performed more easily. That is, since the work for fixing the charger 58 to the vehicle body is performed as described above, the work for fixing the charger side bracket 82 and the rear mounting bracket 66 is performed between the charger 58 and each of the battery packs 32 and 34. It can be performed in a wide space away from the narrow space between. For this reason, even when the width Wa between the battery packs 32 and 34 is small, the work of fixing the charger 58 to the vehicle body between the battery packs 32 and 34 can be performed more easily. In this case, when the front mounting bracket is used instead of the rear mounting bracket 66 as described above, the connection structure between the front mounting bracket and the charger side bracket 82 is determined by connecting the rear mounting bracket 66 and the charger side bracket 82 to each other. It can also be configured in the same manner as the coupling structure.

  The battery side brackets 62 and 64 are directly fixed to the battery packs 32 and 34, and the rear mounted battery pack 34 or the front mounted battery pack 32 is attached to the vehicle body via the rear mounted bracket 66 or the front mounted bracket. It is fixed. Further, the rear mounting bracket 66 or the front mounting bracket is fixed to the vehicle body at a joint portion between the rear mounting bracket 66 and the front mounting battery side bracket 62 or a joint portion between the front mounting bracket and the rear mounting battery side bracket 64. Yes. For this reason, it is possible to reduce the weight by reducing the number of connecting parts when the battery packs 32 and 34 and the charger 58 are fixed to the vehicle body, and it is possible to reduce the number of assembling steps. Further, since the rear mounting bracket 66 is coupled to the vehicle body at the coupling portion between the front mounting battery side bracket 62 and the vehicle body, a hybrid vehicle in which only the front mounting battery pack 32 is mounted as a drive source of the traveling motor 24 (FIG. 1) is considered. The existing vehicle body coupling portion can be used in the hybrid vehicle of the present embodiment. For this reason, it becomes easy to improve the coupling strength between the rear mounting bracket 66 and the vehicle body.

[Second Embodiment]
FIG. 14 is a diagram corresponding to FIG. 2 in the second embodiment of the present invention. In the case of the first embodiment shown in FIG. 2 above, the charger 58 has a top surface located above the top surfaces of both of the battery packs 32 and 34. The battery packs 32 and 34 are arranged. On the other hand, in the present embodiment, charger 58 has an uppermost surface positioned below the uppermost surface of at least one of the battery packs 32 and 34 (in the illustrated example, rear-mounted battery pack 34). The charger 58 and the battery packs 32 and 34 are arranged so as to have

  According to this embodiment, it is possible to prevent the upper portion of the charger 58 from protruding above the uppermost surface of at least one of the battery packs 32 and 34. For this reason, the upper side of the battery packs 32, 34 can be easily placed on the upper side of at least one of the battery packs 32, 34 (the rear-mounted battery pack 34 in the illustrated example). It becomes easy to plan effective use of space. Since other configurations and operations are the same as those of the first embodiment, overlapping illustrations and descriptions are omitted.

1 is a schematic circuit diagram of a motor controller for a hybrid vehicle according to a first embodiment of the present invention. Similarly, in a hybrid vehicle, it is a schematic diagram showing a state in which a charger is disposed between a front-mounted battery pack and a rear-mounted battery pack. It is a perspective view of the back mounting bracket which comprises the structure of FIG. FIG. 3 is a schematic exploded view, partly in cross-section, showing a state in the middle of fixing the front-mounted battery pack and the rear-mounted battery pack to the vehicle body for the arrangement state of FIG. 2. FIG. 6 is a perspective view showing a state in the middle of arranging the rear mounting bracket so as to avoid the rear mounting boost converter and the cooling pipe after the first mounting battery pack is similarly disposed on the vehicle body. FIG. 6 is a partially enlarged view of FIG. 5 showing a state after the rear mounting bracket is disposed on the vehicle body after the state of FIG. 5. FIG. 3 is a schematic diagram showing a state in the middle of arranging a charger between a pre-installed battery pack and a post-installed battery pack for the arrangement state of FIG. 2. It is a perspective view of the charger side bracket which comprises the structure of FIG. It is a schematic perspective view for demonstrating the part which attaches a charger side bracket to the charger which comprises the structure of FIG. It is a perspective view which shows the state which similarly attached the charger side bracket to the charger. It is the figure seen from the upper part of FIG. In 1st Embodiment, after installing a front mounting battery pack and a back mounting bracket in a vehicle body, it is a perspective view which shows the state in the middle of installing a charger and a back mounting battery pack from upper direction. It is the figure which looked at the state which has similarly arrange | positioned the front mounting battery pack, the rear mounting battery pack, and the charger to the vehicle body from above. FIG. 3 is a diagram corresponding to FIG. 2 in a second embodiment according to the present invention. It is the schematic for demonstrating the inconvenience when not arranging a charger and a battery when the width between two batteries is small.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Car body, 12 front mounting battery, 14 back mounting battery, 16 charger, 18 charger fixing bracket, 20 battery fixing bracket, 22 generator (MG1), 24 travel motor (MG2), 26 control unit, 28 power generation Machine inverter (MG1 inverter), 30 travel motor inverter (MG2 inverter), 31 motor controller, 32 pre-installed battery pack, 34 post-installed battery pack, 36, 38, 40, 42 system relay, 44 first Capacitor, 46 Second capacitor, 48 Third capacitor, 50 First mounted boost converter, 52 Rear mounted boost converter, 54 AC power supply, 56 Cooling piping, 58 Charger, 60 Floor panel, 62 First mounted battery side bracket, 64 Rear Onboard battery side bracket, 66 Rear tower Mounting bracket, 68 Main body part, 70, 71 Connecting arm part, 72 Column part, 74 Connecting part, 76 bolt, 78 through hole, 80 Top plate part, 82 Charger side bracket, 83 Through hole, 84 bolt, 86, 88 Through hole, 92 nut, 94 mounting plate, 95 through hole, 96 bottom plate, 98 mounting plate, 100, 102 through hole, 104, 106, 108 bottom surface, 110 space.

Claims (9)

A first power storage unit;
A second power storage unit disposed to be parallel to the first power storage unit with a horizontal space with respect to the first power storage unit;
A charger connected to at least one of the first power storage unit and the second power storage unit, and capable of charging from the external power source to at least one power storage unit of the first power storage unit and the second power storage unit. An electric vehicle,
The battery charger is disposed between the first power storage unit and the second power storage unit, and has a lowermost surface positioned above the lowermost surfaces of both the first power storage unit and the second power storage unit. . The electric vehicle according to claim 1,
The battery charger has an uppermost surface located below the uppermost surface of at least one power storage unit of the first power storage unit and the second power storage unit. In the electric vehicle according to claim 1 or claim 2,
An electric vehicle comprising: a power storage unit side bracket for fixing the first power storage unit or the second power storage unit to the vehicle body, which is disposed vertically below the lowermost surface of the charger. In the electric vehicle according to claim 3,
An electric vehicle characterized in that when the power storage unit side bracket and the charger are viewed from above, at least a part of the power storage unit side bracket overlaps with the charger. In the electric vehicle according to any one of claims 1 to 4,
An electric vehicle comprising a pipe disposed between a lower surface of a charger and an upper surface of a vehicle body. The electric vehicle according to claim 5,
The pipe is a cooling pipe that is arranged below the first power storage unit or the second power storage unit and allows cooling air to flow through the boost converter that boosts the voltage from the first power storage unit or the second power storage unit. An electric vehicle characterized by. The electric vehicle according to any one of claims 1 to 6,
A vehicle body side bracket for fixing the first power storage unit or the second power storage unit to the vehicle body;
A charger side bracket fixed directly to the charger,
An electric vehicle characterized in that the vehicle body side bracket and the charger side bracket are integrally coupled. The electric vehicle according to claim 7,
The charger and the charger side bracket are coupled at an end portion on the side facing the power storage unit of at least one of the first power storage unit and the second power storage unit of the charger,
The charger side bracket and the vehicle body side bracket are connected to each other at a portion protruding in a direction parallel to the length direction of the first power storage unit and the second power storage unit in the charger side bracket. Electric vehicle. In the electric vehicle according to claim 7 or claim 8,
A power storage unit side bracket is directly fixed to each of the first power storage unit and the second power storage unit,
The first power storage unit or the second power storage unit is fixed to the vehicle body via the vehicle body side bracket,
The vehicle body side bracket is fixed to the vehicle body at a joint portion between the power storage unit side bracket fixed to at least one of the first power storage unit and the second power storage unit and the vehicle body side bracket. vehicle.

Images