JP2016220363A - Power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply device which enables easy handling during shipping and transportation.SOLUTION: A power supply device includes: a battery pack 3; an electric connection box 6; a voltage transducer 7; an ECU 8; and a housing 4. The battery pack 3 comprises electric cells 2. The electric connection box 6 has an electric connection circuit including a relay which switches a connection state between the battery pack 3 and a load. The voltage transducer 7 has a voltage conversion circuit which coverts a voltage output from the electric connection circuit and outputs the voltage. The ECU 8 has a control circuit which controls the electric connection circuit and the voltage conversion circuit. The housing 4 houses the battery pack 3, the electric connection box 6, the voltage transducer 7, and the ECU 8.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power supply device.

  2. Description of the Related Art Conventionally, an electric vehicle battery management device that travels by charging and discharging a battery is known (see, for example, Patent Document 1). This conventional technique detects an abnormality in the amount of hydrogen gas generated and alarms the abnormality when hydrogen gas is abnormally generated from the battery due to charging / discharging of the battery. In this prior art, a battery housed in a battery box, a junction box (electrical connection box) that charges the battery by supplying a charging current to the battery, an ECU that controls the battery, and a high voltage from the battery And a DC / DC converter that converts the power to a weak 12V power source. The electric junction box, ECU, and DC / DC converter are disposed outside the battery box. Thus, conventionally, an electrical junction box, an ECU, and a DC / DC converter are arranged outside the battery box. Further, the battery and the electric connection box and the ECU, the ECU and the electric connection box and the DC / DC converter, and the signal line connecting the electric connection box and the DC / DC converter are exposed outside the battery box.

Japanese Patent Laid-Open No. 11-164401

  As described above, in the prior art, there is a risk that the electric junction box, ECU, DC / DC converter, battery, and signal line may come into contact with or collide with other parts during transportation or transportation. As described above, the conventional power supply device requires a high degree of care in handling during transportation and transportation.

  The present invention has been made in view of the above, and an object of the present invention is to provide a power supply device that can be easily handled during transportation and transportation.

  In order to solve the above problems, a power supply device according to the present invention includes an assembled battery, an electrical junction box, a voltage converter, an ECU, and a housing. The assembled battery is composed of a plurality of single cells. The electrical connection box has an electrical connection circuit including a relay that switches a connection state between the assembled battery and the load. The voltage converter has a voltage conversion circuit that converts and outputs the voltage output from the electrical connection circuit. The ECU includes a control circuit that controls the electrical connection circuit and the voltage conversion circuit. A housing | casing accommodates the said assembled battery, the said electrical-connection box, the said voltage converter, and the said ECU inside, It is characterized by the above-mentioned.

  In the above power supply apparatus, the electrical junction box is located between the voltage converter and the ECU. The electrical junction box is exposed to the outside on the side facing the voltage converter, exposed to the outside on the side facing the ECU, and a first terminal electrically connected to the electrical connection circuit. And a second terminal electrically connected to the electrical connection circuit. The voltage converter has a third terminal that is exposed to the outside on the side facing the electrical junction box and is electrically connected to the voltage conversion circuit. The ECU has a fourth terminal that is exposed to the outside on the side facing the electrical junction box and is electrically connected to the control circuit. The first terminal and the third terminal are electrically connected. It is preferable that the second terminal and the fourth terminal are electrically connected.

  The power supply apparatus may further include a first heat conducting member disposed outside the wall surface of the electrical junction box, and a second heat conducting member disposed outside the wall surface of the voltage converter. . It is preferable that the first heat conducting member and the second heat conducting member are disposed in contact with the inside of the wall surface of the housing.

  In the power supply device described above, it is preferable that the electrical junction box, the voltage converter, and the ECU are disposed at a distance from the assembled battery.

  Further, in the above power supply device, the casing is formed between the ventilation holes formed so as to penetrate the opposing wall surfaces of the casing and facing each other, and the electrical connection It is preferable to have a box, the voltage converter, and a gas flow passage that passes through a space formed between the ECU and the assembled battery.

  Further, in the above power supply device, the first heat conducting member and the second heat conducting member are disposed outside the wall surface of the housing, and the heat of the wall surface of the housing is transferred to the housing. It is preferable to include a heat dissipation device that radiates heat to the outside of the body.

  The power supply apparatus according to the present invention accommodates an electrical junction box, a voltage converter, and an ECU inside a housing that houses an assembled battery. That is, the assembled battery, the electrical junction box, the voltage converter, and the ECU are not exposed outside the casing. For this reason, the signal lines connecting them are not exposed to the outside of the housing. Thereby, the contact and collision between the assembled battery, the electrical junction box, the voltage converter, the ECU, and the signal line and other components during transportation and transportation are suppressed. For this reason, the power supply device can be easily handled during transportation and transportation.

FIG. 1 is a perspective view showing a power supply device according to an embodiment of the present invention. FIG. 2 is a side view showing the power supply device shown in FIG. FIG. 3 is a plan view showing the power supply device shown in FIG. FIG. 4 is a front view showing the power supply device shown in FIG. FIG. 5 is a perspective view showing a state in which the electrical junction box, the voltage converter, and the ECU of the power supply device are assembled. FIG. 6 is a front view showing a state in which the electric junction box, voltage converter, and ECU of the power supply device shown in FIG. 5 are assembled. FIG. 7 is a plan view showing a state in which the electric junction box, voltage converter, and ECU of the power supply device shown in FIG. 5 are assembled. FIG. 8 is an exploded perspective view showing a state in which the electric junction box, voltage converter, and ECU of the power supply device shown in FIG. 5 are assembled. FIG. 9 is an exploded perspective view showing a state in which the power supply device shown in FIG. 1 is assembled.

  Hereinafter, embodiments of a power supply device according to the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated.

  1 to 3 show the overall configuration of a power supply device according to an embodiment of the present invention. FIG. 1 is a perspective view showing a power supply device according to an embodiment of the present invention. FIG. 2 is a side view showing the power supply device shown in FIG. FIG. 3 is a plan view showing the power supply device shown in FIG. FIG. 4 is a front view showing the power supply device shown in FIG. FIG. 5 is a perspective view showing a state in which the electrical junction box, the voltage converter, and the ECU of the power supply device are assembled. FIG. 6 is a front view showing a state in which the electric junction box, voltage converter, and ECU of the power supply device shown in FIG. 5 are assembled. FIG. 7 is a plan view showing a state in which the electric junction box, voltage converter, and ECU of the power supply device shown in FIG. 5 are assembled. FIG. 8 is an exploded perspective view showing a state in which the electric junction box, voltage converter, and ECU of the power supply device shown in FIG. 5 are assembled. FIG. 9 is an exploded perspective view showing a state in which the power supply device shown in FIG. 1 is assembled. In the following description, the arrow X direction shown in FIG. 1 is referred to as the front-rear direction, the arrow Y direction as the left-right direction, and the arrow Z direction as the up-down direction. In addition, about the front-back direction, the arrow X1 direction in FIG. 1 is specified as a front side (front), and the arrow X2 direction is specified as a rear side (rear). The direction of arrow X1 is described later, for example, when inserting the counterpart terminal into the high voltage terminal insertion portion 43 and the low voltage terminal insertion portion 44 of the casing 4 of the power supply device 1 described later, and when removing the power supply device 1 from the counterpart terminal. This is also the direction in which the high voltage terminal 65 of the electrical connection box 6 of the power supply device 1 and the low voltage terminal 73 of the voltage converter 7 are pulled out. The arrow X2 direction is, for example, the insertion direction of the high-voltage terminal 65 of the electrical junction box 6 of the power supply device 1 and the low-voltage terminal 73 of the voltage converter 7 into the counterpart terminal. With respect to the left-right direction, the arrow Y1 direction in FIG. The arrow Y2 direction is, for example, the flow direction of the gas flowing between the vent holes 42.

  The power supply device 1 is mounted on a vehicle and supplies power to a drive motor that is a drive source of the vehicle. As shown in FIGS. 1 to 4, the power supply device 1 mainly includes an assembled battery 3 in which a plurality of single cells 2 are combined, a housing 4, a heat radiation fin (heat radiation device) 5, and an electrical connection box (junction box). ) 6, a voltage converter (DC / DC converter) 7, and an ECU 8. In the present embodiment, the integrated electrical junction box 6, voltage converter 7 and ECU 8 are referred to as an output control device 9.

  The single battery 2 is a secondary battery including a lithium ion battery, for example. The unit cell 2 is formed in a substantially rectangular parallelepiped shape. The unit cell 2 may be formed in a laminate shape. The unit cell 2 is provided with a positive electrode terminal and a negative electrode terminal on the upper surface. A plurality of the unit cells 2 are used according to the output capacity of the power supply device 1.

  The assembled battery 3 includes a plurality of single cells 2. In the present embodiment, the assembled battery 3 is configured by arranging a plurality of unit cells 2 in the X direction and the Y direction. The assembled battery 3 includes a plurality of single cells 2 that are electrically connected in series or in parallel. A total positive electrode (not shown) and a total negative electrode (not shown) are formed at both ends of the assembled battery 3. The total positive electrode and the total negative electrode are electrically connected to a terminal block 64 of the electrical connection box 6 described later. Such an assembled battery 3 includes a plurality of bus bars 31 and a monitoring device (not shown).

  The bus bar 31 is made of a conductive metal material and is formed in a flat plate shape. The bus bar 31 has a through-hole formed in the thickness direction. The through holes are formed at intervals in the longitudinal direction of the bus bar 31. The plurality of bus bars 31 constitute the assembled battery 2 by electrically connecting the plurality of single cells 2 in series or in parallel.

  The monitoring device measures the temperature and voltage of the cell 2 and the assembled battery 3, and the abnormality of the cell 2 and the assembled battery 3 (for example, abnormal heat generation, overdischarge, overcharge, etc.) based on the measured temperature and voltage. The presence or absence of this is determined, or control such as adjustment and interruption of the current flowing through the assembled battery 3 is performed. Further, the monitoring device outputs, for example, the battery state including the temperature and voltage of the unit cell 2 and the assembled battery 3 and the presence or absence of abnormality to the ECU 8 described later as a control signal via a signal line.

  The assembled battery 3 having such a configuration is installed in the housing 4. Specifically, the assembled battery 3 is placed and fixed on the bottom surface of the main body 41 of the housing 4.

  The housing 4 is formed in a substantially rectangular parallelepiped shape with an upper surface opened. The housing 4 mainly includes a main body portion 41, a vent hole 42, a high-voltage terminal insertion portion 43, and a low-voltage terminal insertion portion 44.

  The main body 41 has a substantially square bottom surface and four wall surfaces erected upward from each side of the bottom surface. Specifically, the four wall surfaces are arranged to face the front wall surface 41a erected upward from the front end portion of the bottom surface, the left wall surface 41b erected upward from the left end portion of the bottom surface, and the left wall surface 41b. And a rear wall surface 41d disposed to face the front wall surface 41a. The main body 41 accommodates the assembled battery 3, an electrical connection box 6, a voltage converter 7 and an ECU 8, that is, an output control device 9, which will be described later. In the main body 41, an interval is provided between the assembled battery 3 and the output control device 9. Such a main body 41 is covered with a plate-like lid on the upper surface. In addition, you may substitute with other parts arrange | positioned in the assembly position of the housing | casing 4 instead of a cover body, for example, the bottom face of a vehicle seat.

  The ventilation hole 42 allows outside air (gas) to flow through the housing 4. The vent hole 42 is formed through the rear side of the right wall surface 41 c and the rear side of the left wall surface 41 b of the main body 41. The vent holes 42 are arranged to face each other. A gas flow passage S that passes through a space between the assembled battery 3 and the output control device 9 is formed between the vent holes 42. The flow path S is located on the front side of the output control device 9, that is, on the opposite side of the radiation fin 5 described later with respect to the output control device 9. Further, a duct (not shown) is connected to the vent hole 42 formed in the right wall surface 41 c from the outside of the housing 4. Thereby, the gas blown out from the duct flows into the vent hole 42 formed in the right wall surface 41c. A part of the gas flowing into the housing 4 passes through the flow passage S and is discharged to the outside of the housing 4 from the vent hole 42 formed in the left wall surface 41b.

  The high-voltage terminal insertion portion 43 has an insertion hole through which a high-voltage terminal 65 of the electrical connection box 6 described later is inserted. That is, the high-voltage terminal insertion portion 43 exposes the high-voltage terminal 65 of the electrical connection box 6 to the outside of the housing 4. The high-voltage terminal insertion portion 43 is formed on the upper side on the central right side of the rear wall surface 41 d of the main body portion 41.

  The low voltage terminal insertion part 44 has an insertion hole through which a low voltage terminal 73 of the voltage converter 7 described later is inserted. That is, the low voltage terminal insertion portion 44 exposes the low voltage terminal 73 of the voltage converter 7 to the outside of the housing 4. The low-voltage terminal insertion portion 44 is formed on the upper side on the central left side of the rear wall surface 41 d of the main body portion 41.

  The heat radiating fin 5 radiates the heat of the housing 4 to the outside of the housing 4. The heat radiation fin 5 cools the housing 4 and the inside of the housing 4. The heat radiating fins 5 are disposed at the center outside the rear wall surface 41 d of the main body 41 of the housing 4. The radiating fin 5 is made of a material having high thermal conductivity and has a plurality of flat plates. The flat plates extend in the up-down direction and are spaced apart in the left-right direction. In the present embodiment, the radiating fin 5 is formed on the rear wall surface 41d of the main body portion 41 of the housing 4 with which a heat conductive insulator 66 of the electrical connection box 6 described later and a heat conductive insulator 74 of the voltage converter 7 are in contact. Arranged outside. That is, the radiating fin 5 faces the heat conductive insulator 66 and the heat conductive insulator 74 with the rear wall surface 41 d of the main body 41 of the housing 4 interposed therebetween. Such radiating fins 5 radiate the heat of the rear wall surface 41 d of the main body 41 of the housing 4 to the outside of the housing 4.

  The electrical junction box 6 mainly switches the connection state between the assembled battery 3 and the high-voltage load or low-voltage load. The electrical junction box 6 outputs a high-voltage current to a driving motor that is a high-voltage load of the vehicle. The electrical junction box 6 is accommodated in the housing 4. The electrical junction box 6 has a printed circuit board circuit therein. In the printed circuit board circuit, an electrical connection circuit including a semiconductor relay that switches a connection state between the assembled battery 3 and a high voltage load or a low voltage load is mounted on the printed circuit board. The electrical connection circuit controls the semiconductor relay based on a control signal output from the ECU 8 described later. In the printed circuit board, a through circuit for outputting a control signal for the voltage converter 7 from the ECU 8 to the voltage converter 7 as it is is mounted on the printed circuit board. The electrical junction box 6 may house various electronic components including, for example, a fuse, a semiconductor relay, and a terminal. In the electrical connection box 6 in this case, these electronic components are connected to form an electrical connection circuit that switches the connection state between the assembled battery 3 and the high-voltage load or low-voltage load. As shown in FIGS. 5 to 9, the electrical junction box 6 mainly includes a case 61, a first male terminal (first terminal) 62, a first female terminal (second terminal) 63, and a terminal block 64. The high-voltage terminal 65 and a heat conductive insulator (first heat conductive member) 66 are provided. In addition, although the semiconductor relay was illustrated as a relay which switches the connection state of the battery 3 and a high voltage load or a low voltage load, a mechanical relay may be sufficient as a relay.

  The case 61 is made of a synthetic resin material and has a substantially rectangular parallelepiped shape. Specifically, the case 61 is opposed to the rectangular front wall surface 61a having a long side extending in the vertical direction, the left wall surface 61b extending from the left end of the front wall surface 61a to the rear side, and the left wall surface 61b. And a rear wall surface 61d disposed opposite to the front wall surface 61a, a bottom surface, and a top surface. A printed circuit board is placed on the front side of the rear wall surface 61d (inside the case 61). In the case 61 having such a configuration, a space is provided between the front wall surface 61 a and the assembled battery 3 in a state where the electrical junction box 6 is fixed to the rear wall surface 41 d of the main body 41 of the housing 4.

  The first male terminal 62 outputs a high-voltage current to the voltage converter 7. The first male terminal 62 outputs a control signal that has passed through the through circuit to the voltage converter 7. The first male terminal 62 protrudes from the left wall surface 61 b of the case 61 in the left direction. Two first male terminals 62 are disposed apart from each other in the vertical direction. The first male terminal 62 has a bus bar that outputs a high-voltage current from the electrical connection circuit. A part of the bus bar is formed as a male conductive part at least a part of which is exposed. The first male terminal 62 is electrically connected to the electrical connection circuit via a male conductive portion.

  The first female terminal 63 receives a control signal output from the ECU 8. The control signal output from the ECU 8 includes a control signal for controlling the electrical connection circuit of the electrical connection box 6 and a control signal for controlling the voltage conversion circuit of the voltage converter 7. The first female terminal 63 is formed in a concave shape by cutting out the corners of the front wall surface 61 a and the right wall surface 61 c of the case 61. Two first female terminals 63 are spaced apart in the vertical direction. The first female terminal 63 has a female conductive portion at least partially exposed. The first female terminal 63 is electrically connected to the electrical connection circuit through a female conductive portion.

  The terminal block 64 is connected to the total positive electrode and the total negative electrode of the assembled battery 3 and receives a high voltage current. The terminal block 64 protrudes forward from the center lower side of the front wall surface 61a. The terminal block 64 has a positive terminal 64a and a negative terminal 64b. Each of the terminals 64a and 64b has a female conductive portion at least partially exposed. The positive electrode side terminal 64 a is connected to an electric wire drawn from the total positive electrode of the assembled battery 3. The negative electrode side terminal 64 b is connected to an electric wire drawn from the total negative electrode of the assembled battery 3. The terminal block 64 is electrically connected to the electrical connection circuit through a female conductive part. Thereby, the electrical connection circuit is electrically connected to the assembled battery 3.

  The high voltage terminal 65 supplies a high voltage current to the drive motor. The high-voltage terminal 65 protrudes rearward from the center upper side of the rear wall surface 61d. The high voltage terminal 65 is made of a conductive metal material. The high voltage terminal 65 includes two plate-like terminals spaced apart from each other in the vertical direction. The high voltage terminal 65 is electrically connected to the electrical connection circuit.

  The heat-conducting insulator 66 conducts heat from the case 61. The heat conductive insulator 66 is made of a material having a higher thermal conductivity than that of the case 61 and having an electrical insulating property. For this reason, the heat of the case 61 is conducted to the heat conductive insulator 66. The heat conductive insulator 66 is set to have the same size and shape as the rear wall surface 61d. The heat conductive insulator 66 covers the rear side of the rear wall surface 61d (the outside of the case 61). Further, the heat conductive insulator 66 contacts the front side of the rear wall surface 41 d of the main body 41 of the housing 4 (inside the rear wall surface 41 d). Heat generated by heat generated in the electrical connection circuit of the printed circuit board circuit (hereinafter referred to as first circuit heat) is conducted to the heat conducting insulator 66 through the rear wall surface 61d. For this reason, when the case 61 becomes hotter than the heat conductive insulator 66 due to the first circuit heat, the heat of the heat conductive insulator 66 becomes high because the heat of the case 61 is conducted through the rear wall surface 61d. The heat conducted to the heat conducting insulator 66 is conducted to the rear wall surface 41 d of the main body 41 of the housing 4 when the heat conducting insulator 66 becomes hotter than the main body 41 of the housing 4.

  The voltage converter 7 mainly converts a high-voltage current discharged from the assembled battery 3 into a low voltage (12 V or 60 V) and outputs the low voltage load. The voltage converter 7 is accommodated in the housing 4. The voltage converter 7 has a printed circuit board circuit therein. In the printed circuit board circuit, a voltage conversion circuit for converting a high voltage current output from the electrical connection circuit of the electrical connection box 6 into a low voltage and outputting it to a low voltage load is mounted on the printed circuit board. The voltage conversion circuit controls the voltage conversion circuit based on a control signal output from the ECU 8 described later via the through circuit of the electrical junction box 6. The voltage converter 7 mainly includes a case 71, a second female terminal (third terminal) 72, a low voltage terminal 73, a heat conductive insulator (second heat conductive member) 74, a mounting bolt insertion portion 75, Is provided.

  The case 71 is made of a metal material and has a substantially rectangular parallelepiped shape. Specifically, the case 71 is opposed to the rectangular front wall surface 71a having a long side extending in the vertical direction, the left wall surface 71b extending from the left end of the front wall surface 71a to the rear side, and the left wall surface 71b. And a rear wall surface 71d disposed opposite to the front wall surface 71a, a bottom surface, and an upper surface. A printed circuit board is placed on the front side of the rear wall surface 71d (inside the case 71). The length in the vertical direction of the case 71 having such a configuration (hereinafter referred to as the height of the voltage converter 7) is the length in the vertical direction of the case 61 of the electrical junction box 6 (hereinafter referred to as the height of the electrical junction box 6). It is set to be almost equivalent to that.) The length in the left-right direction of the case 71 (hereinafter referred to as the width of the voltage converter 7) is the length in the left-right direction of the case 61 of the electrical connection box 6 (hereinafter referred to as the width of the electrical connection box 6). It is set approximately the same. Furthermore, the sum of the thickness in the front-rear direction of the case 71 and the thickness in the front-rear direction of the heat conductive insulator 74 (to be described later) (hereinafter referred to as the thickness of the voltage converter 7) is the front-rear direction of the case 61 in the electrical junction box 6. And the sum of the thicknesses of the heat conductive insulator 66 in the front-rear direction (hereinafter referred to as the thickness of the electrical junction box 6).

  The second female terminal 72 receives a control signal output from the ECU 8 and passed through the through circuit of the electrical junction box 6. The second female terminal 72 receives a high-voltage current output from the electrical junction box 6 in order to supply the low-voltage load. The second female terminal 72 is formed in a concave shape by cutting out the corners of the front wall surface 71a and the right wall surface 71c of the case 71. Two second female terminals 72 are spaced apart in the vertical direction. The first male terminal 62 is inserted into and fitted into the second female terminal 72. The second female terminal 72 is in close contact with the first male terminal 62 in a state in which the first male terminal 62 is inserted and fitted into the second female terminal 72. At this time, the right wall surface 71 c of the case 71 is in close contact with the left wall surface 61 b of the case 61. The second female terminal 72 has a bus bar for connecting the input high-voltage current to the voltage conversion circuit. A part of the bus bar is formed as a female conductive part at least a part of which is exposed. The second female terminal 72 is electrically connected to the voltage conversion circuit via a female conductive part. The second female terminal 72 is electrically connected to the first male terminal 62 when the first male terminal 62 is inserted and fitted into the second female terminal 72.

  The low voltage terminal 73 supplies a low voltage current to the low voltage load of the vehicle. The low voltage terminal 73 protrudes rearward from the upper side of the left wall surface 71b. The low voltage terminal 73 is made of a conductive metal material. The low voltage terminal 73 includes two plate-like terminals spaced apart from each other in the vertical direction. The low voltage terminal 73 is electrically connected to the voltage conversion circuit.

  The heat-conducting insulator 74 conducts heat from the case 71. The heat conductive insulator 74 is made of a material having higher heat conductivity than the case 71 and having electrical insulation. For this reason, the heat of the case 71 is conducted to the heat conductive insulator 74. The heat conductive insulator 74 is set to have the same size and shape as the rear wall surface 71d. The heat conductive insulator 74 covers the rear side of the rear wall surface 71d (the outside of the case 71). Further, the heat conductive insulator 74 is in contact with the inside of the rear wall surface 41 d of the main body 41 of the housing 4. Heat generated by heat generation in the voltage conversion circuit of the printed circuit board circuit (hereinafter referred to as second circuit heat) is conducted to the heat conducting insulator 74 through the rear wall surface 71d. For this reason, when the case 71 becomes higher in temperature than the heat conductive insulator 74 due to the second circuit heat, the heat of the heat conductive insulator 74 is heated through the rear wall surface 71d. The heat conducted to the heat conducting insulator 74 is conducted to the rear wall surface 41 d of the main body 41 of the housing 4 when the heat conducting insulator 74 becomes hotter than the main body 41 of the housing 4.

  The attachment bolt insertion portion 75 has an insertion hole for inserting an attachment bolt for fixing the output control device 9 to the rear wall surface 41 d of the main body portion 41 of the housing 4. The mounting bolt insertion portion 75 is provided to project leftward from the upper side and the lower side at the left end portion of the rear wall surface 71 d of the case 71. The mounting bolt insertion part 75 is formed in a square washer shape.

  The ECU 8 mainly controls the electrical connection circuit of the electrical connection box 6 and the voltage conversion circuit of the voltage converter 7. The ECU 8 is accommodated in the housing 4. The ECU 8 has a printed circuit board circuit therein. In the printed circuit board circuit, a control circuit for controlling the electrical connection circuit of the electrical connection box 6 and the voltage conversion circuit of the voltage converter 7 is mounted on the printed circuit board. The control circuit controls the electrical connection circuit of the electrical connection box 6 and the voltage conversion circuit of the voltage converter 7 based on the control signal output from the monitoring device of the assembled battery 3. The ECU 8 mainly includes a case 81, a second male terminal (fourth terminal) 82, a monitoring device terminal 83, and a mounting bolt insertion portion 84.

  The case 81 is made of a synthetic resin material and has a substantially rectangular parallelepiped shape. Specifically, the case 81 is opposed to the rectangular front wall surface 81a having a long side extending in the vertical direction, the left wall surface 81b extending from the left end of the front wall surface 81a to the rear side, and the left wall surface 81b. The rear wall surface 81c disposed opposite to the front wall surface 81a, the bottom surface, and the upper surface are formed. The length of the case 81 having such a configuration in the vertical direction (hereinafter referred to as the height of the ECU 8) is set to be approximately equal to the height of the electrical junction box 6. The length of the case 81 in the left-right direction (hereinafter referred to as the width of the ECU 8) is set to be approximately equal to the width of the electrical junction box 6. Further, the thickness of the case 81 in the front-rear direction (hereinafter referred to as the thickness of the ECU 8) is set to be approximately equal to the thickness of the electrical junction box 6.

  The second male terminal 82 outputs a control signal for controlling the electrical connection circuit of the electrical connection box 6 and the voltage conversion circuit of the voltage converter 7. The second male terminal 82 protrudes from the left wall surface 81 b of the case 81 in the left direction. Two second male terminals 82 are arranged apart in the vertical direction. The second male terminal 82 is inserted and fitted into the first female terminal 63. The second male terminal 82 is in close contact with the first female terminal 63 in a state where the second male terminal 82 is inserted and fitted into the first female terminal 63. At this time, the left wall surface 81 b of the case 81 is in close contact with the right wall surface 61 c of the case 61. The second male terminal 82 has a male conductive portion at least partially exposed. The second male terminal 82 is electrically connected to the control circuit via a male conductive part. The second male terminal 82 is electrically connected to the first female terminal 63 when inserted and fitted into the first female terminal 63.

  The monitoring device terminal 83 receives a control signal indicating the state of the battery output from the monitoring device of the assembled battery 3. The monitoring device terminal 83 is formed in a concave shape (see FIG. 5) by cutting out the center of the front wall surface 81 a of the case 81. The monitoring device terminal 83 is electrically connected to the control circuit. The monitoring device terminal 83 is electrically connected to the monitoring device of the assembled battery 3 through a signal line. The monitoring device terminal 83 is controlled to output an appropriate voltage from the high voltage terminal 65 of the electrical connection box 6 or the low voltage terminal 73 of the voltage converter 7 based on the input control signal, or to stop the output. A control signal is output from the circuit.

  The attachment bolt insertion portion 84 has an insertion hole for inserting an attachment bolt for fixing the output control device 9 to the rear wall surface 41 d of the main body portion 41 of the housing 4. The mounting bolt insertion portion 84 protrudes in the right direction from the upper side and the lower side at the right end portion of the rear wall surface 81 d of the case 81. The mounting bolt insertion portion 84 is formed in a square washer shape.

  The electrical junction box 6, the voltage converter 7, and the ECU 8 having such a configuration are assembled and integrated. Specifically, as shown in FIG. 8, the first male terminal 62 is inserted and fitted into the second female terminal 72. Thereby, the male conductive part of the first male terminal 62 and the female conductive part of the second female terminal 72 are electrically connected. Thus, the electrical junction box 6 and the voltage converter 7 are assembled. Further, the second male terminal 82 is inserted and fitted into the first female terminal 63. Thereby, the female conductive part of the first female terminal 63 and the male conductive part of the second male terminal 82 are electrically connected. Thus, the electrical junction box 6 and the ECU 8 are assembled.

  Moreover, the thickness of the electric junction box 6, the voltage converter 7, and ECU8 is substantially equivalent. Further, the heights of the electrical junction box 6, the voltage converter 7 and the ECU 8 are substantially the same. Further, the left wall surface 61 b of the case 61 and the right wall surface 71 c of the case 71 are in close contact with each other with the first male terminal 62 inserted into the second female terminal 72 and fitted. The right wall surface 61c of the case 61 and the left wall surface 81b of the case 81 are in close contact with the second male terminal 82 inserted into the first female terminal 63 and fitted. For this reason, in the integrated electrical junction box 6, voltage converter 7, and ECU 8, that is, the output control device 9, the front wall surfaces 61a, 71a, 81a are smoothly continuous without any step. In addition, the top surface and the bottom surface are smoothly continuous with no steps. Furthermore, the heat conductive insulators 66 and 74 and the rear wall surface 81d are smoothly continuous without a step. Thus, the output control apparatus 9 becomes a substantially rectangular parallelepiped shape.

  The output control device 9 having such a configuration is installed in the housing 4. Specifically, the heat conduction insulator 66 of the electrical junction box 6, the heat conduction insulator 74 of the voltage converter 7, and the rear wall surface 81 d of the case 81 of the ECU 8 are the same as the rear wall surface 41 d of the main body 41 of the housing 4. Fixed in contact with the inside. At this time, the high voltage terminal 65 of the electrical connection box 6 is positioned so as to be exposed from the high voltage terminal insertion portion 43 of the housing 4. Further, the low voltage terminal 73 of the voltage converter 7 is positioned so as to be exposed from the low voltage terminal insertion portion 44 of the housing 4. And the output control apparatus 9 is fixed to the housing | casing 4 with the attachment volt | bolt each inserted in the attachment volt | bolt insertion part 75 of the voltage converter 7, and the attachment volt | bolt insertion part 84 of ECU8. As a result, the output control device 9 is fixed inside the rear wall surface 41 d of the main body 41 of the housing 4.

  The output control device 9 is electrically connected to the assembled battery 3. Specifically, the terminal block 64 of the electrical connection box 6 is electrically connected to the total positive electrode and the total negative electrode of the assembled battery 3. The monitoring device terminal 83 of the ECU 8 is electrically connected to the monitoring device of the assembled battery 3.

  The power supply device 1 having such a configuration is assembled to a vehicle. Specifically, the high voltage terminal 65 of the electrical junction box 6 is connected to a terminal on the drive motor side. The low voltage terminal 73 of the voltage converter 7 is connected to a low voltage load side terminal of the vehicle.

  Here, the effect | action of the power supply device 1 which concerns on this embodiment is demonstrated.

  When the driving of the vehicle is started and the driving motor is driven, the assembled battery 3 repeats charging and discharging. The high-voltage current discharged from the assembled battery 3 is output from the electrical junction box 6 to the drive motor. A part of the high-voltage current is output from the electrical junction box 6 to the voltage converter 7, converted into a low voltage by the voltage converter 7, and output to the low-voltage load. With such an operation, the electrical connection circuit of the electrical connection box 6 and the voltage conversion circuit of the voltage converter 7 generate heat when a high-voltage current flows.

  The first circuit heat is conducted to the heat conducting insulator 66 through the rear wall surface 61 d of the case 61. The heat of the heat conductive insulator 66 is conducted to the heat radiating fins 5 through the rear wall surface 41 d of the main body 41 of the housing 4. Further, the second circuit heat is conducted to the heat conduction insulator 74 via the rear wall surface 71 d of the case 71. The heat of the heat conductive insulator 74 is conducted to the heat radiating fins 5 through the rear wall surface 41 d of the main body 41 of the housing 4. And the heat of the radiation fin 5 is radiated to the outside air in contact with the radiation fin 5. Thereby, the first circuit heat and the second circuit heat are radiated to the outside of the housing 4.

  Further, the gas in the housing 4 becomes high temperature due to heat generated by the battery pack 3, the electrical connection circuit of the electrical connection box 6, and the voltage conversion circuit of the voltage converter 7. In the present embodiment, the gas in the housing 4 that has reached a high temperature is referred to as a high temperature gas. The hot gas passes through the flow path S and is discharged from the vent hole 42 to the outside of the housing 4. For this reason, the inside of the housing 4 is cooled by the gas flowing through the flow passage S. Further, since the gas flowing through the flow passage S comes into contact with the front side of the output control device 9, the output control device 9 is cooled from the front side.

  As described above, according to the present embodiment, the housing 4 that houses the assembled battery 3 houses the output control device 9 therein. That is, the assembled battery 3, the electrical junction box 6, the voltage converter 7, and the ECU 8 are not exposed outside the housing 4. For this reason, the signal lines connecting them are not exposed to the outside of the housing 4. Thereby, the assembled battery 3, the electric junction box 6, the voltage converter 7, the ECU 8, and the signal line are not likely to come into contact with or collide with other parts during transportation or transportation. For this reason, the power supply device 1 can be easily handled during transportation and transportation.

  In the power supply device 1, the electrical junction box 6 is located between the voltage converter 7 and the ECU 8. In such a power supply device 1, the high-voltage current discharged from the assembled battery 3 is mainly output from the electrical connection box 6 while maintaining a high voltage, and a part of the high-voltage current is output to the adjacent voltage converter 7. In the converter 7, it is converted into a low pressure and outputted. For this reason, the bus bar serving as the conductive path for the high-voltage current is only provided on the first male terminal 62 and the second female terminal 72 and can be miniaturized. In this way, the power supply device 1 can be reduced in weight and cost by reducing the size of the bus bar.

  In addition, the electrical junction box 6 and the voltage converter 7 can be electrically connected by inserting the first male terminal 62 into the second female terminal 72 and fitting. The electrical junction box 6 and the ECU 8 can be electrically connected by inserting and fitting the second male terminal 82 into the first female terminal 63. In the electrical junction box 6, the voltage converter 7 and the ECU 8, which are integrated in this way, that is, the output control device 9, the front wall surfaces 61a, 71a, 81a are smoothly continuous without a step, and the upper surface and the bottom surface are Each of them is smoothly continuous without a step, and the heat conductive insulators 66 and 74 and the rear wall surface 81d are smoothly continuous without a step. That is, the electrical junction box 6, the voltage converter 7 and the ECU 8 are formed in a substantially rectangular parallelepiped shape by simply fitting the corresponding male terminals 62 and 82 and the female terminals 63 and 72 together. Thus, the electrical junction box 6, the voltage converter 7, and the ECU 8 can be easily integrated.

  Also, the first circuit heat can be conducted to the heat conducting insulator 66. Also, the second circuit heat can be conducted to the heat conducting insulator 74. The heat of the heat conductive insulator 66 and the heat of the heat conductive insulator 74 can be radiated to the outside air by the heat radiating fins 5 through the rear wall surface 41 d of the main body 41 of the housing 4. That is, the first circuit heat and the second circuit heat can be radiated to the outside of the housing 4.

  Further, the high temperature gas can pass through the flow passage S and be discharged from the vent hole 42 to the outside of the housing 4. Thus, the inside of the housing 4 can be cooled by the gas flowing through the flow passage S. In addition, the flow passage S is located on the front side of the output control device 9, that is, on the opposite side of the radiation fin 5 described later with respect to the output control device 9. For this reason, since the gas which distribute | circulates the flow path S contacts the front side of the output control apparatus 9, the output control apparatus 9 can be cooled from the front side.

  Thus, the first circuit heat and the second circuit heat can be radiated by the heat radiation fin 5 from the rear side of the output control device 9 through the heat conductive insulator 66 and the heat conductive insulator 74. Further, the output control device 9 can be cooled from the front side by the gas flowing through the flow passage S. Thus, by cooling the output control device 9 from the rear side and the front side, the power supply device 1 can more reliably suppress the high temperature.

  Although the present invention has been described based on the embodiments shown in FIGS. 1 to 9, the above-described embodiments are merely examples of the present invention, and the present invention is only the configuration of the above-described embodiments. It is not limited to. Therefore, it is obvious to those skilled in the art that the present invention can be implemented in a form modified or changed within the scope of the gist of the present invention. It goes without saying that it belongs to the claims.

  Moreover, the assembly position of the electrical junction box 6, the voltage converter 7, and the ECU 8 is not limited to the above. For example, the ECU 8 may be arranged at a position away from the heat radiating fins 5 and the flow passages S because the heat generation amount is smaller than that of the electrical junction box 6 and the voltage converter 7. Specifically, the ECU 8 may be disposed on the assembled battery 3. In this case, the electrical junction box 6 and the voltage converter 7 are preferably arranged in the same manner as in the above embodiment. As described above, the electrical junction box 6, the voltage converter 7, and the ECU 8 can be arranged at appropriate positions according to the empty space in the housing 4 in the power supply device 1. That is, the electrical connection box 6, the voltage converter 7, and the ECU 8 in the power supply device 1 increase the degree of freedom in designing the arrangement positions.

  Further, in order to improve the rigidity of the output control device 9, the wall surfaces 61b, 61c, 71c, 81b facing each other in the electrical junction box 6, the voltage converter 7, and the ECU 8 may have uneven portions that fit together. Good. Specifically, the left and right wall surfaces 61b of the case 61 and the right wall surface 71c of the case 71 are respectively formed with concavo-convex portions that fit together. In addition, a fitting uneven portion is formed on the right wall surface 61c of the case 61 and the left wall surface 81b of the case 81, respectively. Thus, the rigidity of the output control device 9 is further improved by fitting the wall surfaces 61b, 61c, 71c, 81b facing each other in the electrical junction box 6, the voltage converter 7, and the ECU 8 by the concave and convex portions.

  Further, the vent holes 42 formed in the housing 4 may not be disposed at positions facing each other on the right wall surface 41 c and the left wall surface 41 b of the body portion 41 of the housing 4 that face each other. In this case, a duct may be connected to the vent hole 42 in the housing 4 so that the flow passage S passes between the assembled battery 3 and the output control device 9. Specifically, the duct is installed so as to blow out from the vent hole 42 formed in the right wall surface 41c to the flow passage S, or connected to the vent hole 42 formed in the left wall surface 41b from the flow passage S. Just do it. Thus, the vent hole 42 can be formed in accordance with the position of a duct inside the vehicle (a duct connected to the vent hole 42 formed in the right wall surface 41c from the outside of the housing 4). That is, the vent hole 42 in the power supply device 1 increases the degree of freedom in designing the arrangement position.

  Moreover, although the heat radiation fin 5 shall be arrange | positioned on the outer side of the rear wall surface 41d of the main-body part 41 of the housing | casing 4 with which the heat conductive insulator 66 and the heat conductive insulator 74 contact | abutted, it is in this position. It is not limited. For example, the heat radiating fins 5 may be disposed over the entire outer surface of the rear wall surface 41 d of the main body 41 of the housing 4. Thus, the radiation fin 5 may be in another position as long as the heat conducted from the heat conductive insulator 66 and the heat conductive insulator 74 can be radiated to the outside. In other words, the heat dissipating fin 5 in the power supply device 1 increases the degree of freedom in designing the arrangement position.

DESCRIPTION OF SYMBOLS 1 Power supply device 2 Single battery 3 Assembly battery 31 Bus bar 4 Case 41 Main body part 41a, 41b, 41c, 41d Wall surface 42 Vent hole 43 High voltage terminal insertion part 44 Low voltage terminal insertion part 5 Heat radiation fin (heat radiation device)
6 electrical junction box 61 case 61a, 61b, 61c, 61d wall surface 62 first male terminal (first terminal)
63 First female terminal (second terminal)
65 High voltage terminal 66 Thermally conductive insulator (first thermal conductive member)
7 Voltage converter 71 Case 71a, 71b, 71c, 71d Wall surface 72 Second female terminal (third terminal)
73 Low voltage terminal 74 Thermal conductive insulator (second thermal conductive member)
8 ECU
81 Case 81a, 81b, 81c, 81d Wall 82 Second male terminal (fourth terminal)
83 Terminal for monitoring device 9 Output control device S Flow path

Claims (6)

An assembled battery composed of a plurality of single cells;
An electrical connection box having an electrical connection circuit including a relay for switching a connection state between the assembled battery and the load;
A voltage converter having a voltage conversion circuit that converts and outputs the voltage output from the electrical connection circuit;
An ECU having a control circuit for controlling the electrical connection circuit and the voltage conversion circuit;
A housing that houses the assembled battery, the electrical junction box, the voltage converter, and the ECU;
Comprising
A power supply device characterized by that. The electrical junction box is located between the voltage converter and the ECU;
The electrical junction box is exposed to the outside on the side facing the voltage converter, exposed to the outside on the side facing the ECU, and a first terminal electrically connected to the electrical connection circuit. A second terminal electrically connected to the electrical connection circuit,
The voltage converter is formed to be exposed to the outside on the side facing the electrical junction box, and has a third terminal electrically connected to the voltage conversion circuit,
The ECU has a fourth terminal formed to be exposed to the outside on the side facing the electrical junction box and electrically connected to the control circuit;
Electrically connecting the first terminal and the third terminal;
Electrically connecting the second terminal and the fourth terminal;
The power supply device according to claim 1. A first heat conducting member disposed outside the wall surface of the electrical junction box;
A second heat conducting member disposed outside the wall surface of the voltage converter;
With
The first heat conducting member and the second heat conducting member are disposed in contact with the inside of the wall surface of the housing.
The power supply device according to claim 1 or 2. The electrical junction box, the voltage converter, and the ECU are disposed at a distance from the assembled battery,
The power supply device according to claim 2 or 3. The casings are formed through the opposing wall surfaces of the casing, and are formed between the vents facing each other, the electrical junction box, the voltage converter, and A gas flow path that passes through a space formed between the ECU and the assembled battery,
The power supply device according to claim 4. A heat dissipating device that is disposed outside the wall surface of the housing in contact with the first heat conducting member and the second heat conducting member, and dissipates heat from the wall surface of the housing to the outside of the housing. ,
Comprising
The power supply device according to any one of claims 3 to 5.

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