JP6652030B2 - Battery device - Google Patents

Description

  The disclosure in this specification relates to a battery device.

  Patent Literature 1 discloses a battery unit including a switching element that controls input and output of power to and from a battery pack. The switching element is mounted on the control board. As shown in FIG. 4 of Patent Document 1, on a base provided in a battery unit, a plurality of mounting portions fastened and fixed to a mounting location of a vehicle with bolts or the like are provided so as to protrude outward from an outer peripheral edge of the base. Have been. In the battery unit, the mounting portion closest to the switch SW1, which is a switching element, is located below the plan view of FIG. 4 and beside the terminal block unit.

JP 2015-153675 A

  In the battery unit of Patent Literature 1, heat generated by the switch unit SW1 moves to a heat radiating unit immediately below via a control board, is transmitted to a base, and moves to a vehicle-side member via a mounting unit closest to the switch unit SW1. Is released outside. When the battery unit is viewed in a plan view, an assembled battery module is installed on a straight path that connects the switch unit SW1 to the nearest mounting unit. Due to this configuration, the heat transfer path between the mounting portion closest to the switch portion SW1 and the switch portion SW1 in plan view is likely to be shorter than the heat transfer path between any other mounting portion and the switch portion SW1. The heat generated by the switch SW1 may be transmitted to the battery module while moving to the nearest mounting portion. Therefore, the battery unit of Patent Document 1 has a problem that the battery is thermally affected by the heat generated by the switch unit SW1.

  In view of such a problem, an object of the disclosure in this specification is to provide a battery device that can suppress transmission of heat of a switch device that controls input and output of power to a battery to the battery.

  The embodiments disclosed in this specification employ different technical means from each other in order to achieve the respective objects. Further, the reference numerals in the claims and the parentheses described in this section are examples showing a correspondence relationship with specific means described in the embodiment described below as one aspect, and limit the technical scope. is not.

One of the disclosed battery devices is a battery device that controls input and output of electric power to and from an internal battery (13) housed in a case and an external battery (17) installed at a separate location away from the internal battery. A first switch device (3), a second switch device (4) for controlling the input and output of electric power to and from the internal battery, and a heat dissipating member formed of a thermally conductive material, wherein the first switch device A heat dissipating member (6) provided so that heat from each of them can move with respect to the device and the second switch device, and a heat dissipating member is provided on a base portion (15a) of the case so as to move. Attachment portions (15a2, 15a3) that are directly or indirectly attached to the vehicle-side member in a configuration capable of dissipating heat to the vehicle-side member (7), and control charging and discharging of the internal battery. Do It includes a road substrate (2), a,
The internal battery has the outer shape of each of the first switch device and the second switch device, and most of the respective switch devices in a state where the case is viewed in a direction orthogonal to the arrangement direction of the internal battery and the heat radiating member. It is installed outside a heat radiation path area (AR1, AR2) formed by connecting the external shape of the mounting portion at a close position. The respective exterior portions (30) of the first switch device and the second switch device are installed so as to be separated from the circuit board. The first switch device, the second switch device, the heat radiating member and the mounting portion are provided at a position below and below the circuit board.

According to this battery device, in a state where the case is viewed in a direction orthogonal to the arrangement direction of the internal battery and the heat radiating member, the internal battery is located at the position closest to the outer shape of the first switch device and the first switch device. Is installed outside the heat radiation path area formed by connecting the outer shape of the mounting portion. Further, the internal battery is installed outside a heat dissipation path area formed by connecting the outer shape of the second switch device and the outer shape of the mounting portion closest to the second switch device. Accordingly, the internal battery is disposed in a heat radiating path for radiating the heat of the first switch device and the heat of the second switch device, which are generated by the input / output control of the electric power, from the heat radiating member to the vehicle side member via the mounting portion. A configuration that does not exist can be provided. Therefore, it is possible to provide a battery device capable of suppressing transmission of heat of the switch device to the internal battery.
Also, one of the disclosed battery devices is a device for transmitting power to an internal battery (13) housed in a case (11, 15) and an external battery (17) installed in a separate place away from the internal battery. A first switch device (3) for controlling input and output, a second switch device (4) for controlling input and output of power to the internal battery, and a heat dissipating member formed of a material having thermal conductivity. And a heat radiating member (6) provided so that heat from each of them can move with respect to the first switch device and the second switch device, and a case movably provided with heat from the heat radiating member. A mounting portion (15a2) that is directly or indirectly mounted to the vehicle-side member in a configuration capable of dissipating heat to the vehicle-side member (7), and a circuit that controls charging and discharging of the internal battery; Substrate (2 And, with a,
The internal battery has an outer shape formed by combining the first switch device and the second switch device in a state where the case is viewed in a direction orthogonal to the arrangement direction of the internal battery and the heat radiating member; Both the switch device and the second switch device are installed outside a heat radiation path area (AR) formed by connecting the outer shape of the mounting portion located closest to the switch device. The exterior parts (30) of the first switch device and the second switch device are installed in a state separated from the circuit board. The first switch device, the second switch device, the heat radiating member and the mounting portion are provided at a position below and below the circuit board.

FIG. 2 is an exploded perspective view illustrating a configuration of the battery device according to the first embodiment. FIG. 2 is a circuit diagram related to the battery device of the first embodiment. It is the outline top view which showed the state which removed the cover regarding the battery device. It is the schematic which showed the heat-dissipation path | route which the heat of a power element transfers about a battery device. FIG. 5 is a schematic diagram illustrating a heat radiation path through which heat of a power element is transmitted for another example of the battery device of FIG. 4. FIG. 6 is a schematic diagram illustrating a heat radiation path in which heat of a power element is transmitted to a mounting portion in the battery device illustrated in FIG. 5. FIG. 6 is a schematic plan view showing a heat dissipation path area for the battery device shown in FIG. 5. FIG. 8 is a schematic plan view illustrating another example of the heat dissipation path area illustrated in FIG. 7. FIG. 8 is a schematic plan view illustrating another example of the heat dissipation path area illustrated in FIG. 7. It is the outline top view showing the state where the cover was removed about the battery device of a 2nd embodiment. It is the schematic which showed the heat-radiation path | route which the heat of a power element transfers to a mounting part about the battery device of 3rd Embodiment. FIG. 12 is a schematic plan view showing a heat radiation path area for the battery device shown in FIG. 11. FIG. 14 is a circuit diagram related to a battery device according to a fourth embodiment.

  Hereinafter, a plurality of embodiments for carrying out the present disclosure will be described with reference to the drawings. In each embodiment, portions corresponding to the items described in the preceding embodiment are denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each embodiment, the other embodiments described above can be applied to other parts of the configuration. Not only the combination of parts that clearly indicate that a combination is possible in each form, but also the forms can be partially combined without being specified, unless there is a particular problem with the combination. It is possible.

(1st Embodiment)
The battery device 10 according to the first embodiment will be described with reference to FIGS. The battery device 10 can be applied to various types of electric equipment on which a secondary battery is mounted. Various electric devices are, for example, a device having a storage battery, a computer, a vehicle, and the like. In the first embodiment, as an example, a case in which the battery device 10 is used in a vehicle such as a hybrid vehicle using a combination of an internal combustion engine and a battery-driven motor as a driving source, an electric vehicle running by a battery-driven motor, and the like. explain.

  The configuration of the battery device 10 will be described with reference to FIG. The battery device 10 includes an assembled battery 13 configured by stacking a plurality of unit cells, a circuit board 2 that controls charging and discharging of the assembled battery 13, and a suppression plate that restrains the assembled battery 13 from above. 12 and a case for accommodating the assembled battery 13 and the like. The battery device 10 is installed, for example, under a seat of an automobile, in a space between a rear seat and a trunk room, and in a space between a driver's seat and a passenger seat. The case has a rectangular parallelepiped shape, and includes a base case 15 fixed to a mounting location of the battery device 10 and a cover 11 attached to the base case 15 so as to cover the base case 15 from above. The base case 15 and the cover 11 are formed of a metal, for example, aluminum, copper, an alloy thereof, or a resin material. When the base case 15 is formed of a resin material, it is preferable to use a resin material having thermal conductivity or to mix a material having thermal conductivity with the resin material.

  The assembled battery 13 and the circuit board 2 are installed so as to face each other up and down so that the assembled battery 13 is lower than the circuit board 2, and each is fixed to the base case 15 by screwing or the like. By attaching the cover 11 to the base case 15 from above, the battery pack 13 and the circuit board 2 are housed in the case.

  The battery device 10 includes a terminal block unit 14 for inputting and outputting power, and a connector unit electrically connected to a vehicle ECU or the like. The terminal block unit 14 includes a terminal block unit 14A for connecting a Pb storage battery and a terminal block unit 14B for connecting an ISG. The terminal block unit 14A has a first input / output terminal 140 connected to the external battery 17 side in FIG. 2 and a terminal block supporting the first input / output terminal 140. The terminal block unit 14B includes a second input / output terminal 141 connected to the rotating machine 19 in FIG. 2 and a terminal block supporting the second input / output terminal 141. The battery device 10 further includes a terminal block unit 14C for connecting an electric load. The terminal block unit 14C has a terminal block for supporting the third input / output terminal 142 connected to the electric load 18B side in FIG. Each terminal block is formed of an insulating resin material. The terminal block unit 14A and the terminal block unit 14B have their terminal blocks fixed to the base case 15 at positions that are arranged side by side with each other. The terminal block of the terminal block unit 14C is fixed to the base case 15.

  The external battery 17 and the electric load 18A are connected to the first input / output terminal 140 of the terminal block unit 14A via a harness. The rotating machine 19 is connected to the second input / output terminal 141 of the terminal block unit 14B via a harness. The rotating machine 19 is a motor generator. The electric load 18B is connected to the third input / output terminal 142 of the terminal block unit 14C via a harness. The connector unit is configured to be connected to a vehicle ECU capable of communicating with the control unit 100 and to be connectable to various electric loads to which power is supplied from the battery device 10. Each terminal block unit and the connector are provided on the outer peripheral portion of the case, and are provided so as to be exposed to the outside of the battery device 10.

  The control unit 100 is a device that manages at least the amount of power stored in the assembled battery, and may be a battery management unit. Further, the battery management unit may be a device that monitors the current, voltage, and temperature of the assembled battery, and that manages abnormalities of the unit cells, abnormal electric leakage, and the like. The battery management unit is configured to be able to communicate with various electronic control devices mounted on the vehicle. The signal relating to the current value detected by the current sensor may be input to the battery management unit, or a control device that controls the operation of the main relay or the precharge relay may be used. The battery management unit may function as a device that controls the operation of a motor of a blower that drives a cooling fluid to cool a heating element such as a unit cell. The battery management unit is configured to be able to communicate with various electronic control units (for example, a vehicle ECU) mounted on the vehicle.

  As shown in FIG. 2, the circuit configuration related to the battery device 10 includes an external battery 17, an assembled battery 13, a rotating machine 19, an electric load 18A, an electric load 18B, a first power element 3, a second power element 4, It includes a three power element 300, a fourth power element 400, a control unit 100, and the like. The assembled battery 13 is an internal battery installed inside a case that houses the battery device 10, and is configured by, for example, a lithium ion secondary battery. The assembled battery 13 is preferably a secondary battery having a small resistance and excellent regenerative performance. The external battery 17 is a secondary battery installed outside a case that houses the battery device 10, and is configured by, for example, a lead storage battery. The external battery 17 is installed in a different place away from the internal battery, and is preferably a large-capacity secondary battery.

  The assembled battery 13 is configured to include a plurality of cells connected in series, and these cells are housed in a case in a predetermined arrangement as a unit. In this embodiment, as shown in FIG. 1, two first battery stacks 13 a vertically stacked and two second battery stacks 13 b vertically stacked are arranged in two rows. . Each of the five unit cells is a thin rectangular parallelepiped lithium-ion secondary battery, and is installed horizontally with its thickness direction oriented vertically. Each of the battery stacks is connected so as to be able to conduct electricity by connecting all the constituent cells in series. All the battery stacks function as the assembled battery 13 of the battery device 10 by being connected so as to be able to conduct electricity and being integrally connected.

  The components making up the control unit 100 are mounted on the circuit board 2. The control unit 100 switches on / off (open) and on / off (open) each of the switches, which are the above-described power elements, and thereby controls charging and discharging of the external battery 17 and the assembled battery 13 respectively.

  The battery device 10 is provided with a first input / output terminal 140, a second input / output terminal 141, and a third input / output terminal 142 as external terminals. An external battery 17 and an electric load 18A are connected in parallel to the first input / output terminal 140, and a first power element 3 and a second input / output terminal 141 are connected in series on the side opposite to the external battery 17. I have. The external battery 17 is connected so as to be able to supply power to the electric load 18A. The electric load 18A is a general electric load other than the constant voltage request electric load, and is, for example, a headlight, a wiper such as a front windshield, a blower fan of an air conditioner, a defroster heater of a rear windshield, or the like.

  At the connection between the first power element 3 and the second input / output terminal 141, the second power element 4 and the battery pack 13 are connected in series. The rotating machine 19 is connected to the second input / output terminal 141 on the side opposite to the first power element 3. The first power element 3 and the second power element 4 are connected in parallel to the rotating machine 19. The first power element 3, which is the first switch device, functions as a switch device that switches the external battery 17, the electric load 18A, and the rotating machine 19 between a state where power can be supplied and a state where power cannot be supplied. The second power element 4 serving as a second switch device functions as a switch device that switches the battery pack 13 and the rotating machine 19 between a state where power can be supplied and a state where power cannot be supplied.

  The third power element 300 and the fourth power element 400 are connected in parallel to the third input / output terminal 142, and the electric load 18B is connected to the opposite side of the third power element 300. The electric load 18B is an electric load requiring a constant voltage, in which the voltage of the supplied power is substantially constant or the voltage fluctuation is within a predetermined range and is required to be stable. The electric load 18B is, for example, a vehicle-mounted navigation device, a vehicle-mounted audio device, a meter, or the like.

  A third power element 300 is connected to a connection between the first power element 3 and the first input / output terminal 140, and the third power element 300 is connected to a third input / output terminal 142. The third power element 300 functions as a switch device that switches between a state where power can be supplied from the external battery 17 to the electric load 18B and a state where power cannot be supplied. At the connection between the third power element 300 and the third input / output terminal 142, a current path is provided for connecting a portion between the second power element 4 and the battery pack 13. The current path is switched by the fourth power element 400 between a state where power can be supplied and a state where power cannot be supplied. The fourth power element 400 functions as a switch device that switches between a state where power can be supplied from the battery pack 13 to the electric load 18B and a state where power cannot be supplied.

  The rotating machine 19 comprises an ISG (Integrated Starter Generator) having a power generation function for generating electric power by rotating the crankshaft of the engine, that is, a regenerative electric power generation, and a power output function for applying a rotational force to the crankshaft. The external battery 17 and the battery pack 13 are electrically connected to the rotating machine 19 in parallel. When the first power element 3 is turned on, the external battery 17 is in a state where power can be supplied from the rotating machine 19, and regenerative power can be charged. When the second power element 4 is turned on, the battery pack 13 is in a state where power can be supplied from the rotating machine 19, and regenerative power can be charged. Therefore, each of the first power element 3 and the second power element 4 forms a part of a large current path where a relatively large current is expected to flow between the rotating machine 19 and each battery.

  Next, an on / off state and a current flow state of each power element according to the operation state of the hybrid vehicle will be described.

  At the time of deceleration, electric power regeneration for recovering the kinetic energy reduced by the deceleration by the rotating machine 19 is performed. At the time of the power regeneration, the control unit 100 controls the first power element 3 to the on state, the second power element 4 to the on state, the third power element 300 to the off state, and the fourth power element 400 to the on state. As a result, the regenerative power generated by the rotating machine 19 charges the battery pack 13 and the external battery 17 and is supplied to the electric loads 18A and 18B.

  At the time of idling stop or running of the engine, the rotating machine 19 is in a standby state. At this time, the control unit 100 controls the first power element 3 to the on state, the second power element 4 to the off state, the third power element 300 to the off state, and the fourth power element 400 to the on state. As a result, the stored power of the external battery 17 is supplied to the electric load 18A, and the stored power of the battery pack 13 is supplied to the electric load 18B.

  When restarting from the idling stop state, the rotating machine 19 plays a role as a starter. At this time, the control unit 100 controls the first power element 3 to the on state, the second power element 4 to the off state, the third power element 300 to the off state, and the fourth power element 400 to the on state. The stored power of the external battery 17 is supplied to the rotating machine 19 and the electric load 18A, and the stored power of the battery pack 13 is supplied to the electric load 18B. Thus, the rotating machine 19 functions as a starter, increases the rotation of the engine, and restarts the engine.

  In an assist state such as an EV creep state or acceleration, the rotating machine 19 operates by supplying power from the battery pack 13. For example, the control unit 100 controls the first power element 3 to an off state, the second power element 4 to an on state, the third power element 300 to an on state, and the fourth power element 400 to an off state. Thereby, the stored power of the external battery 17 is supplied to the electric loads 18A and 18B, and the stored power of the battery pack 13 is supplied to the rotating machine 19.

  Further, when the stored power of the battery pack 13 is sufficient in an assist state such as during acceleration or the like, the control unit 100 turns off the first power element 3, turns on the second power element 4, and turns on the third power element. 300 is turned off, and the fourth power element 400 is turned on. Thereby, the stored power of the external battery 17 is supplied to the electric load 18A, and the stored power of the battery pack 13 is supplied to the rotating machine 19 and the electric load 18B.

  FIG. 3 shows a plan view of the battery device 10 with the cover 11 removed. FIG. 4 is a schematic view of the inside of the case of the battery device 10 in a side view, and shows a heat radiation path through which heat of the power element is transmitted.

  The base case 15 has a base 15a, a fixing boss 15b rising from the base 15a, and a side wall 15c rising from the base 15a. The base portion 15a has a rectangular shape, and a side wall portion 15c is formed at a peripheral portion or the like. The base portion 15a is a battery mounting portion on which the assembled battery 13 is placed. The circuit board 2 and the suppression plate 12 are fixed to upper ends of the side wall 15c and the boss 15b by screws or the like. A plurality of mounting portions projecting outward are provided on the outer peripheral edge of the base portion 15a.

  On the base portion 15a, a first battery stack 13a and a second battery stack 13b that constitute the battery assembly 13 are arranged side by side in a predetermined direction. The first battery stack 13a and the second battery stack 13b are arranged side by side in a plan view. The circuit board 2 is provided above the first battery stack 13a and the second battery stack 13b.

  The first power element 3 and the second power element 4 which are semiconductor elements for power control are mounted on the circuit board 2. The first power element 3 and the second power element 4 are semiconductor switching elements, and are an example of a switch device that controls input and output of power to and from a battery. The exterior parts of the first power element 3 and the second power element 4 correspond to an exterior case that protects the heart of the device, and are made of various materials capable of releasing internal heat to the outside. The exterior part has a flat rectangular parallelepiped shape formed of, for example, a resin.

  The base case 15 is integrally provided with a heat radiating member 6 that constitutes a part of a heat radiating path for radiating heat generated in the first power element 3 and the second power element 4 to the outside. The heat dissipating member 6 forms a part of the base case 15. The heat radiating member 6 can be formed of, for example, aluminum, copper, or an alloy thereof. The heat dissipating member 6 is disposed so as to be in direct or indirect contact with the circuit board 2 at a flat portion on the upper surface thereof and to be located below the first power element 3 and the second power element 4. Therefore, the heat radiating member 6 faces the exterior of the first power element 3 and the second power element 4 with the circuit board 2 interposed therebetween at a position adjacent to the battery pack 13. The heat radiating member 6 and the battery pack 13 are arranged side by side in the horizontal direction. The first power element 3 or the second power element 4 located above the heat radiating member 6 and the battery pack 13 are arranged side by side in the arrangement direction of the heat radiating member 6 and the battery pack 13.

  Battery device 10 includes a plurality of mounting portions provided on the case so that heat from heat radiating member 6 can move. The heat dissipating member 6 is configured to be capable of transferring heat to a vehicle-side member 7 that is a part of the vehicle via a plurality of attachment portions. The attachment portion is directly or indirectly attached to the vehicle-side member 7 in a configuration capable of dissipating heat to the vehicle-side member 7.

  As shown in FIG. 1 and FIG. 3, the plurality of mounting portions are a mounting portion 15a1, a mounting portion 15a2, a mounting portion 15a3, and a mounting portion 15a4. Each mounting portion is fixed to the vehicle-side member 7 by fixing means such as bolting or screwing, welding, a restraining band, fitting connection, engagement, or the like. The vehicle side member 7 is, for example, a frame member to which a predetermined device is fixed to a vehicle, a member connected to a chassis, a member for supporting an interior material forming a vehicle interior, and the like. The attachment portion 15a1 is provided so as to be located outside the first battery stack 13a. The mounting portion 15a4 is provided at a position facing the mounting portion 15a1 with the assembled battery 13 therebetween and outside the second battery stack 13b. The mounting portion 15a3 is provided so as to be located outside the second power element 4 on the same side wall portion 15c where the mounting portion 15a4 is provided. The mounting portion 15a2 is provided on the side wall 15c adjacent to the side wall 15c on which the mounting portions 15a4 and 15a3 are provided, so as to be located outside the first power element 3.

  The heat generated by the first power element 3 moves to the heat radiating member 6 via the circuit board 2 and further moves to the base portion 15a as shown by an arrow in FIG. The heat is radiated to the vehicle-side member 7 via the mounting portion 15a2 located closest to the power element 3. The heat generated in the second power element 4 moves to the heat radiating member 6 via the circuit board 2 and further moves to the base part 15a, and is located at a position closest to the second power element 4 among the plurality of mounting parts. The heat is radiated to the vehicle-side member 7 via the mounting portion 15a3.

  In this specification, the state in plan view means that the battery pack 10 is placed on the base unit 15a side when the battery device 10 is installed in a posture in which the battery pack 13 and the base unit 15a of the base case 15 are vertically positioned. Refers to the state looking down toward. The state in which the case is viewed in a direction perpendicular to the arrangement direction of the internal battery and the heat radiating member in the claims includes the state in which the case as illustrated in FIG. 3 is viewed in plan. For example, when the battery device 10 is installed in a posture in which the assembled battery 13 and the base portion 15a are arranged side by side in a direction orthogonal to the arrangement direction of the internal battery and the heat radiating member in the claims. When the case is viewed from the side, the assembled battery 13 is viewed in the lateral direction. Hereinafter, a state in which the case is viewed in a direction orthogonal to the arrangement direction of the battery pack 13 and the heat radiation member 6 may be referred to as a case-view state.

  As shown in FIG. 3, the battery pack 13 is formed by connecting the outer shape of the first power element 3 and the outer shape of the mounting portion 15a3 closest to the first power element 3 in a state viewed from the case. It is installed outside the heat radiation path area AR1. Further, the battery pack 13 is located outside the heat radiation path area AR2 formed by connecting the outer shape of the second power element 4 and the outer shape of the mounting portion 15a2 located closest to the second power element 4 in a case view state. It is installed in. The mounting portion closest to the power element is set to the mounting portion having the shortest linear distance from the power element in a state viewed from the case or a plan view. Further, the mounting portion located closest to the power element may be set to the mounting portion in which the creepage distance of the heat radiation path from the power element to the mounting portion is shortest. This heat radiating path is a path in which heat generated by the power element is the shortest distance to the mounting portion via the heat radiating member.

  The assembled battery 13 is installed such that even a part thereof is not included in the heat radiation path area AR1 or the heat radiation path area AR2 when viewed from the case. Therefore, the assembled battery 13 only needs to be installed so as to be located outside the heat radiation path area AR1 and outside the heat radiation path area AR2 when viewed from the case, and the positional relationship is shown in FIG. However, the present invention is not limited to this.

  The terminal block unit 14A and the terminal block unit 14B are integrated with the case and are arranged side by side at a position closer to the first power element 3 than to the second power element 4. Therefore, the terminal block unit 14A and the terminal block unit 14B are integrally mounted on the case closer to the mounting portion 15a2 closest to the first power element 3 than to the mounting portion 15a3. The terminal block unit 14A and the terminal block unit 14B may be provided as a part of a case, or may be a part separate from the case and mounted on the case to be integrally installed with the case. Good.

  The first input / output terminal 140 in the terminal block unit 14A and the second input / output terminal 141 in the terminal block unit 14B are elements of the first power element 3 and the second power element 4 that have a larger current value or heat generation. It is installed near. The embodiment illustrated in FIG. 3 is a case where the first input / output terminal 140 and the second input / output terminal 141 are installed near the first power element 3 where the flowing current value or the amount of generated heat increases. . When the first power element 3 has a larger current value or heat generation, one of the first input / output terminal 140 and the second input / output terminal 141 connected to the first power element 3 is connected to the other terminal. It is preferable to install them in a state where they are arranged.

  Although not illustrated in FIG. 3, when the second power element 4 has a larger current value or heat generation, the second input / output terminal 141 connected to the second power element 4 is connected to another terminal. It is preferable to install the first input / output terminal 140 in a state where it is arranged. The calorific value of the element can be confirmed by multiplying the square of the current value (A) flowing through the element, the electrical resistance (Ω) of the element, and the time (s) during which the current flows. Since the calorific value can be defined by this calculation, in the battery device 10, the one of the first power element 3 and the second power element 4 having a larger current value may generate a larger calorific value. Further, in the battery device 10, there may be a case where, of the first power element 3 and the second power element 4, the element having the larger electric resistance has a larger calorific value. Depending on the use situation, for example, the driving situation of the vehicle, of the first power element 3 and the second power element 4, the element with the longer current flowing time may generate a large amount of heat. For example, depending on whether the driving state of the vehicle is a regenerative state, an idling stop state, an EV creep state, or an assist state, an element having a large current value or a large amount of heat may be the first power element 3 or the second power element. It may be a two-power element 4.

  The plurality of mounting portions may be connected to the vehicle-side member 7 via a bracket. The bracket is formed of a material having thermal conductivity, and is a connecting member that connects the plurality of mounting portions and the vehicle-side member 7. The inside of the heat radiating member 6 is a rectangular box having a hollow inside. As shown by arrows in FIG. 4, the heat generated in each power element moves from its exterior part to the contact part of the heat radiating member 6 through the circuit board 2, and is transmitted downward from the flat part of the heat radiating member 6 to the side wall. I do. Further, heat is transmitted from the lower end of the side wall to the base portion 15a and is released to the vehicle-side member 7 via the mounting portion 15a2 and the like. Since the battery pack 13 does not exist in the heat radiation path of the first power element 3 and the second power element 4 configured as described above, the configuration of the battery pack 13 can suppress the failure of the battery pack 13 due to the heat transfer.

  The battery device 10 may be configured to have a power element heat radiation path as shown in FIG. Hereinafter, the configuration of the battery device 10 illustrated in FIG. 5 will be described with respect to contents different from the configuration illustrated in FIG. 4. In the configuration shown in FIG. 5, the heat radiating member 6 is provided at a position adjacent to the battery pack 13, and the flat portion on the upper surface thereof has the heat conductive member 5 interposed between the first power element 3 and the second power element 4. It faces the exterior part. Therefore, the circuit board 2 covers the upper part of the battery pack 13 but does not have a shape that covers the upper part of the heat radiation member 6. The heat conductive member 5 is a member having heat conductivity and electrical insulation. For example, a member made of a silicon-based material can be used. The heat conductive member 5 is preferably deformable by an external force so as to be in close contact with the exterior part forming the outer surface of the switch device and the heat radiating member 6, and is made of, for example, an elastically deformable sheet, gel, grease or the like. be able to. The heat conductive member 5 allows heat transfer between each power element and the heat radiating member 6 and is electrically insulated.

  In the case of this configuration, as indicated by arrows in FIG. 5, the heat generated in each power element moves from its exterior part to the contact part of the heat radiation member 6 through the heat conductive member 5, and from the flat part of the heat radiation member 6. It travels down the side wall. Further, heat is transmitted from the lower end of the side wall to the base portion 15a, and is radiated to the vehicle-side member 7 via the mounting portion located closest to each power element. Also in this case, since the battery pack 13 does not exist in the heat radiation path of the first power element 3 and the second power element 4, the configuration is such that the failure of the battery pack 13 due to heat transfer can be suppressed.

  Next, with respect to each power element, the installation relation of the circuit board 2, the heat conductive member 5, the heat radiating member 6, and the mounting portion 152a, the heat radiating path for transmitting the heat of the power element to the mounting portion, and the heat radiating path area are shown in FIG. This will be described with reference to FIG. The first power element 3 and the second power element 4 have the same configuration with respect to the installation relationship between the circuit board 2 and the heat radiating member 6 described below.

  As illustrated in FIG. 6, in the battery device 10, the switch devices such as the first power device 3 and the second power device 4 are connected to the circuit board 2 by the signal line unit 31 through which no current for power supply flows. This is a configuration in which signals are connected so that signal communication is possible. Further, the switch device has a configuration in which the power line portion 32 through which a large current for power supply flows is not connected to the circuit board 2. Therefore, a large current flowing through the device body and the power line section 32 in the switch device is not transmitted to the circuit board 2.

  The first power element 3 is installed at a position below the circuit board 2 in a horizontal position such that its thickness direction is orthogonal to the surface that is the main surface of the circuit board 2. It is in contact with the heat radiation member 6 indirectly via the conductive member 5. Therefore, the first power element 3 and the heat radiating member 6 are laterally adjacent to the battery pack 13 and are installed at a position lower than the circuit board 2. In the first power element 3, the direction in which the signal line portion 31 and the power line portion 32 protrude from the exterior portion 30 is the direction along the main surface of the circuit board 2, and the end portion where the signal line portion 31 and the power line portion 32 protrude. The device width is set so that the direction of the element width forming the length between them is along the main surface of the circuit board 2. The first power element 3 has a flat outer shape in which the width dimension of the exterior part 30 is longer than the thickness dimension.

  The signal line portion 31 is connected to the circuit board 2 by protruding in the lateral direction from the exterior portion 30 and then extending so as to bend in a direction perpendicular to the main surface of the circuit board 2, or mounted on the circuit board 2. Connected to electronic components. The power line section 32 of the first power element 3 is not connected to the circuit board 2 but is connected to the first input / output terminal 140 and the second input / output terminal 141 via the bus bar 33. The power line portion 32 is a conductive terminal joined to the bus bar 33 by welding or the like. The bus bar 33 is supported by the bus bar support member 16 housed in the base case 15 together with the battery pack 13 and the like. The bus bar 33 is a conductive plate-shaped member connected to the first input / output terminal 140 and the second input / output terminal 141. The bus bar support member 16 is also a bus bar case that houses the bus bar 33 in a stable state. The bus bar support member 16 is formed of an electrically insulating material, and insulates the bus bar 33 from surrounding members.

  The heat radiating member 6 has a thermal connection portion with the first power element 3 on a surface extending in the lateral direction. Moreover, the exterior part 30 may be configured to be installed so as to directly contact the heat radiating member 6 without the thermal conductive member 5 therebetween. The means for fixing the first power element 3 to the heat conductive member 5 and the heat radiating member 6 can be configured by an adhesive having an insulating property, for example, a silicon-based adhesive, or a fastening and fixing with a bolt or a screw. The heat dissipating member 6 is installed in such a manner that heat can be transferred to the base portion 15a of the base case 15 in which the battery pack 13 is housed. With the above configuration, the heat transferred from the exterior portion 30 of the first power element 3 to the heat radiating member 6 through the heat conductive member 5 moves to the base portion 15a, and then to the vehicle side member 7 via the mounting portion 15a2. It is emitted by the moving heat dissipation path.

  The heat dissipation path area in the battery device 10 will be described with reference to FIG. As shown in FIG. 7, the mounting portion 15a2 is provided on the case so as to be located closer to the first power element 3 than to the second power element 4. According to this configuration, when the first power element 3 generates a larger amount of heat than the second power element 4, the heat dissipation from the first power element 3 to the mounting portion 15a2 is improved, which is useful.

  The assembled battery 13 is installed so as to be located outside both the heat radiation path area AR1 and the heat radiation path area AR2 shown in FIG. 7 in a plan view. The heat dissipation path area AR1 is formed by connecting the outer shape of the mounting portion 15a2, which is closest to both the first power element 3 and the second power element 4, to the outer shape of the first power element 3 in a plan view. 7 is a range surrounded by a two-dot chain line in FIG. Therefore, the mounting part 15a2 is the closest mounting part for both the first power element 3 and the second power element 4 among the plurality of mounting parts of the battery device 10.

  The heat dissipation path area AR2 is formed by connecting the outer shape of the mounting portion 15a2, which is closest to both the first power element 3 and the second power element 4, to the outer shape of the second power element 4 in a plan view. 7 is a range surrounded by a two-dot chain line in FIG. In the heat radiating path area AR1 and the heat radiating path area AR2, when the heat of each power element moves downward from each power element and reaches the base 15a, the heat is further transferred to the mounting section 15a2 in the direction in which each heat radiating path area in FIG. Move up to. If the battery pack 13 is installed at a position that does not belong to any heat dissipation path area by this heat dissipation path, it is possible to provide the battery device 10 in which the heat dissipation of the battery is not impaired by the heat generated by the power element.

  Alternatively, the battery pack 13 may be configured so as to be located outside the heat dissipation path area AR shown in FIG. 7 in a plan view. The heat dissipation path area AR is closest to the outer shape formed by combining both the first power element 3 and the second power element 4 with both the first power element 3 and the second power element 4 in a plan view. This is a range formed by connecting the outer shape of the mounting portion 15a2 at the position and being enclosed by a two-dot chain line in FIG. In this heat radiation path area AR, when the heat of each power element moves downward from each power element and reaches the base portion 15a, it moves further in the direction in which the heat radiation path area AR extends in FIG. 7 to the mounting portion 15a2. With this heat dissipation path, if the battery pack 13 is installed at a position that does not belong to the heat dissipation path area AR, it is possible to provide the battery device 10 in which the heat dissipation of the battery does not impair the heat dissipation of the battery.

  The power line 32a of the first power element 3 shown in FIG. 7 is connected to the second input / output terminal 141 on the rotating machine 19 side, and the power line 32b is connected to the first input / output terminal 140 on the external battery 17 side. Have been. The power line portion 42a of the second power element 4 shown in FIG. 7 is connected to the input / output terminal on the battery pack 13 side, and the power line portion 42b is connected to the second input / output terminal 141 on the rotating machine 19 side. .

  The heat radiation path area in the battery device 10 may have the form shown in FIG. As shown in FIG. 8, unlike the embodiment shown in FIG. 7, the mounting portion 15a2 is provided in the case at a position closer to the second power element 4 than to the first power element 3. Since the position of the mounting portion 15a2 is different, the shape of the heat radiation path area AR1 and the heat radiation path area AR2 shown in FIG. 8 is different from each heat radiation path area shown in FIG. According to this configuration, when the second power element 4 generates a larger amount of heat than the first power element 3, the heat radiation from the second power element 4 to the mounting portion 15a2 is improved, which is useful.

  The heat radiation path area in the battery device 10 may have the form shown in FIG. As shown in FIG. 9, unlike the embodiment shown in FIG. 7, the mounting portion 15a2 is provided on the case at a position at an equal distance from both the first power element 3 and the second power element 4. In this configuration, the heat radiation path from the first power element 3 to the mounting part 15a2 and the heat radiation path from the second power element 4 to the mounting part 15a2 can be configured to have the same creepage distance. Therefore, even if any of the elements generates a large amount of heat, it is possible to provide the battery device 10 that does not significantly impair the heat radiation.

  Next, effects obtained by the battery device 10 of the first embodiment will be described. The battery device 10 is formed of a battery assembly 13, a first power element 3 and a second power element 4, which are examples of a switch device, a plurality of mounting portions, and a thermally conductive material. A heat radiating member 6 provided so that heat from each of the two power elements 4 can move. The first power element 3 controls the input and output of electric power to and from an external battery 17 installed at a different location away from the battery pack 13. The second power element 4 controls input and output of power to and from the battery pack 13.

  The battery device 10 is provided with a plurality of attachment portions that are provided so as to be able to move heat from the heat radiation member 6 and that are capable of dissipating heat to the vehicle side member 7 and that are directly or indirectly attached to the vehicle side member 7. . In a plan view, the mounting portion 15a2 of the plurality of mounting portions is located closest to the first power element 3, and the mounting portion 15a3 is located closest to the second power element 4. The assembled battery 13 is installed outside the heat radiation path area AR1 formed by connecting the outer shape of the first power element 3 and the outer shape of the mounting portion 15a2 closest to the power element in a plan view. I have. Further, the battery pack 13 is installed outside the heat radiation path area AR2 formed by connecting the outer shape of the second power element 4 and the outer shape of the mounting portion 15a3 closest to the power element in a plan view. ing.

  According to the battery device 10, when viewed in a plan view, the assembled battery 13 is a heat dissipation path formed by connecting the outer shape of the first power element 3 and the outer shape of the mounting portion 15 a 2 closest to the first power element 3. It is installed outside the area AR1. Further, the battery pack 13 is installed outside a heat radiation path area AR2 formed by connecting the outer shape of the second power element 4 and the outer shape of the mounting portion 15a3 closest to the second power element 4 in a plan view. Have been. As a result, the battery pack 13 does not exist in the heat radiation path for dissipating the heat of the first power element 3 that is generated by the input / output control of the power with respect to the external battery 17 from the heat radiation member 6 to the vehicle-side member 7 via the mounting portion 15a2. Configuration can be provided. Further, a configuration in which the battery pack 13 does not exist in the heat radiation path for dissipating the heat of the second power element 4 generated by the input / output control of the power of the battery pack 13 from the heat radiation member 6 to the vehicle-side member 7 via the mounting portion 15a3. Can be provided. Therefore, according to the battery device 10, it is possible to suppress the heat of the switch device from being transmitted to the internal battery of the battery device 10. The battery device 10 can avoid a situation where the battery is thermally affected by the heat generated by the switch device. As described above, in the battery device 10, since the battery exists outside the heat radiation path of the switch device, it is possible to prevent the heat radiation of the switch device from deteriorating the heat radiation of the battery.

  The assembled battery 13 has, when viewed in a plan view, the outer shape of each of the first power element 3 and the second power element 4 and the mounting portion 152a located closest to both the first power element 3 and the second power element 4. Are arranged outside the heat radiation path area AR1 and the heat radiation path area AR2 formed by connecting the external shapes.

  According to this configuration, the assembled battery 13 is configured such that the outer shape of the mounting portion 15a2 and the outer shape of the first power element 3 which are closest to both the first power element 3 and the second power element 4 in a plan view. It is installed outside the heat dissipation path area AR1 formed by connection. Further, the battery pack 13 is formed by connecting the outer shape of the mounting portion 15a2 which is the closest position to both the first power element 3 and the second power element 4 and the outer shape of the second power element 4 in a plan view. It is installed outside the heat radiation path area AR2. Thereby, both the heat of the first power element 3 generated by the input / output control of the power with respect to the external battery 17 and the heat of the second power element 4 generated by the input / output control of the power with respect to the assembled battery 13 are commonly attached. It is possible to provide a configuration in which the battery pack 13 does not exist in the heat radiation path for dissipating heat to the vehicle-side member 7 via the portion 15a2. Therefore, since the heat of both switch devices is released to the outside of the device via the common mounting portion 15a2, heat transfer to the internal battery of the battery device 10 can be suppressed.

  The assembled battery 13 is in a position closest to the outer shape formed by combining the first power element 3 and the second power element 4 and both the first power element 3 and the second power element 4 in a plan view. It is installed outside a heat radiation path area AR formed by connecting the outer shape of the mounting portion 15a2.

  According to this configuration, the assembled battery 13 is configured such that the outer shape of the mounting portion 15a2 located closest to both the first power element 3 and the second power element 4 and the first power element 3 and the second power It is installed outside a heat radiation path area AR formed by connecting an outer shape formed by combining the elements 4. Thereby, both the heat of the first power element 3 generated by the power control of the external battery 17 and the heat of the second power element 4 generated by the power control of the battery pack 13 are transmitted through the common mounting portion 15a2. A configuration in which the battery pack 13 does not exist in the heat radiation path for dissipating heat to the vehicle-side member 7 can be provided. Therefore, since the heat of both switch devices is collected by the mounting portion 15a2 and released to the outside of the device, the heat transfer to the internal battery of the battery device 10 can be suppressed.

  The mounting portion 152a is provided at a position closest to a specific switch device having the largest flowing current value or the largest heat generation amount. According to this configuration, the distance from the specific switch device that generates a large amount of heat to the mounting portion 15a2 can be shortened, so that the amount of heat radiation from the specific switch device can be increased. Therefore, the heat radiation performance of the battery device 10 can be improved.

  The battery device 10 includes a specific input / output terminal connected to a specific switch device having the largest flowing current value or the largest heat generation amount, and another input / output terminal. The specific input / output terminal and the other input / output terminal are arranged side by side at a position closer to the specific switch device than to the other switch device. According to this configuration, the distance to the input / output terminal can be reduced for a specific switch device that generates a large amount of heat, so that the length of the bus bar connecting the specific switch device and the input / output terminal can be reduced. Therefore, since the resistance value of the bus bar can be reduced, the amount of heat generated in the bus bar can be suppressed.

  The exterior part of the switch device is installed in a state separated from the circuit board 2. According to this configuration, since the exterior of the switch device does not contact the circuit board 2, the circuit board 2 can be configured not to be included in the heat dissipation path. Thereby, the heat of the switch device is transmitted to the heat radiating member 6 without passing through the circuit board 2 having a large thermal resistance, so that the heat radiating performance can be improved as compared with the configuration in which the switch device is in contact with the circuit board 2. .

  The switch device has a signal line section 31 for transmitting an electric signal and a power line section 32 for transmitting electric power. The power line unit 32 is not connected to the circuit board 2 but is connected to input / output terminals via a bus bar 33. The signal line portion 31 is a lead terminal protruding from the inside of the switch device to the outside, and is connected to the circuit board 2. The signal line portion 31 is connected to the circuit board 2 by passing through a hole in the board and soldering to one or both sides of the board. According to this configuration, since a large current does not flow through the signal line portion 31, large heat transfer from the signal line portion 31 to the circuit board 2 does not occur, and the power line portion 32 is connected to the circuit board 2. Therefore, the heat generated by the power line unit 32 does not move to the circuit board 2. Therefore, the heat generated by the power line unit 32 can be transferred to the heat radiating member 6 via the switch device and radiated.

  The heat radiating member 6 is directly connected to the vehicle-side member 7 in a configuration capable of transferring heat to the vehicle-side member 7, or is connected via a heat-conductive bracket. According to this configuration, since the heat of the switch device can be transferred to the vehicle-side member 7 having a large heat capacity via the heat radiation member 6, the heat of the switch device can be quickly released to the outside of the battery device 10.

  According to the embodiment shown in FIG. 5, the switch device and the heat radiating member 6 are installed at a lower position with respect to the circuit board 2. According to this configuration, since the heat of the switch device can be quickly moved below the circuit board 2 through the heat radiating member 6, the heat dissipation to the upper circuit board 2 can be suppressed, and the switch device is mounted on the circuit board 2. Thermal effects on electronic components can be suppressed.

(2nd Embodiment)
In the second embodiment, a battery device 110 which is another embodiment of the first embodiment will be described with reference to FIG. In FIG. 10, components denoted by the same reference numerals as those in the drawings of the first embodiment are the same components, and have the same functions and effects. Hereinafter, contents different from the first embodiment will be described.

  As shown in FIG. 10, in the battery device 110, the first input / output terminal 140 of the terminal block unit 14A and the second input / output terminal 141 of the terminal block unit 14B are connected to the first power element 3 and the second power element 4. , The current value or the calorific value is large. The embodiment shown in FIG. 10 is a case where the first input / output terminal 140 and the second input / output terminal 141 are installed near the second power element 4 where the flowing current value or the amount of generated heat increases. . When the second power element 4 has a larger current value or heat generation amount, the second input / output terminal 141 connected to the second power element 4 is arranged in a state of being aligned with the other first input / output terminal 140. Is preferred.

(Third embodiment)
In the third embodiment, a configuration related to thermal connection between the first power element 3 or the second power element 4 and the heat radiating member 6, which is another form of the first embodiment, will be described with reference to FIGS. explain. In each of the drawings, components denoted by the same reference numerals as those in the drawings of the first embodiment are the same components, and have the same functions and effects. Hereinafter, contents different from the first embodiment will be described.

  As shown in FIGS. 11 and 12, the first power element 3 and the second power element 4 are installed so that the thickness direction is along the main surface of the circuit board 2, and the heat conductive member Indirect contact with the heat radiating member 6 via 5. Each power element is in heat-movable contact with the heat radiating member 6 in a vertical posture such that the direction in which the signal line portion 31 projects from the exterior portion 30 is orthogonal to the main surface of the circuit board 2. Therefore, the heat radiating member 6 has a thermal connection portion with each power element on a surface extending in the vertical direction. Further, the exterior portion 30 may be configured to be installed so as to directly contact the heat radiation member 6. The heat dissipating member 6 is provided integrally with the side wall 15c of the base case 15 in which the battery pack 13 is accommodated, and is installed so as to be capable of thermally moving to the base 15a or the mounting portion 15a2 via the side wall 15c. ing.

  As in FIG. 7, the mounting portion 15a2 shown in FIG. 12 is provided on the case so as to be closer to the first power element 3 than to the second power element 4. The mounting portion 15a2 shown in FIG. 12 may be provided at a position closer to the second power element 4 than the first power element 3 as in FIG. 8, or the first power element 3 may be provided as in FIG. And the second power element 4 may be provided in the case at a position at an equal distance from both. When these configurations are adopted, the same operation and effect as those of the first embodiment shown in FIGS. 7 to 9 are obtained.

  According to the third embodiment, each of the first power element 3 and the second power element 4 has an outer shape in which the width dimension of the exterior part 30 is longer than the thickness dimension. The first power element 3 and the second power element 4 are installed in such a manner that the thickness direction thereof is along the direction in which the battery pack 13 and the heat radiating member 6 are arranged. According to this configuration, by installing the power element vertically, the distance from the power element to the mounting portion 15a2 can be shortened, so that the battery device 10 can be downsized.

(Fourth embodiment)
In the fourth embodiment, another embodiment of the circuit diagram described in the first embodiment with reference to FIG. 2 will be described with reference to FIG. In FIG. 13, components denoted by the same reference numerals as those in the drawings of the first embodiment are the same components, and have the same functions and effects. Hereinafter, contents different from the first embodiment will be described.

  The circuit diagram shown in FIG. 13 has a configuration without the third power element 300 and the fourth power element 400 of the first embodiment. With this configuration, the battery device 10 of the fourth embodiment does not have a function of controlling power supply from the external battery 17 to the electric load 18B, and has no function of controlling power supply from the assembled battery 13 to the electric load 18B.

(Other embodiments)
The disclosure of this specification is not limited to the illustrated embodiments. The disclosure embraces the illustrated embodiments and variations based thereon based on those skilled in the art. For example, the disclosure is not limited to the combination of the components and elements shown in the embodiment, and can be implemented with various modifications. The disclosure can be implemented in various combinations. The disclosure may have additional parts that can be added to the embodiments. The disclosure includes those in which the components and elements of the embodiments are omitted. The disclosure encompasses the replacement or combination of parts, elements between one embodiment and another. The disclosed technical scope is not limited to the description of the embodiments. The technical scope disclosed is indicated by the description of the claims, and should be construed to include all modifications within the meaning and scope equivalent to the description of the claims.

  In the above-described embodiment, the battery device is installed so that the arrangement direction of the battery pack 13 and the heat radiation member 6 is horizontal, but the installation state of the battery device is not limited to such a state. For example, the battery device may be configured such that the arrangement direction of the battery pack 13 and the heat radiating member 6 is the vertical direction. In this case, the state in which the case is viewed in a direction orthogonal to the arrangement direction of the internal battery and the heat radiating member in the claims is a state in which the case is viewed in the lateral direction.

  In the above-described embodiment, the first power element 3 and the second power element 4 are described as if each were constituted by one element except for FIG. 1 for the sake of easy understanding. The first power element 3 and the second power element 4 may be configured by a plurality of elements.

  The power element in the above-described embodiment can be replaced with a mechanical relay having no semiconductor element and controlling input / output of electric power to / from a battery. A mechanical relay is a switch device that has, for example, a coil and a contact portion, and realizes a state in which the flow of power is permitted by closing the contact portion to control the input and output of power. In the case of a mechanical relay, its exterior part forms a rectangular parallelepiped case formed of, for example, resin. As described above, the signal line portion 31 and the power line portion 32 protrude outside the case. As described above, the switch device described in the claims includes a power element, a mechanical relay, and the like.

  In the above-described embodiment, the cells constituting each of the external battery 17 and the assembled battery 13 are, for example, a nickel-metal hydride secondary battery and an organic radical battery in addition to the lead storage battery and the lithium ion secondary battery described in the first embodiment. May be configured.

  In the above-described embodiment, the unit cell included in the battery device may have, for example, a form in which the outer case has a thin flat plate shape and the outer case is formed of a laminate sheet. The laminate sheet is made of a highly insulating material. In this case, the unit cell has, for example, an internal space of a flat container that is sealed by heat-sealing the ends of the folded laminate sheet to seal the ends. In this internal space, a battery main body including an electrode assembly, an electrolyte, a terminal connection part, a part of a positive electrode terminal part, and a part of a negative electrode terminal part is incorporated. Therefore, in the unit cell, the battery body is sealed in the flat container by sealing the peripheral portion of the flat container. The unit cell has a pair of electrode terminals that are drawn out of the flat container.

  In the above-described embodiment, for example, a unit cell having a columnar outer shape may be used as the unit cell included in the battery device.

  In the above-described embodiment, the battery included in the battery device can be configured by one or a plurality of unit cells. The plurality of cells may be stacked in a vertical direction or may be stacked in a horizontal direction.

3. First power element (first switch device)
4. Second power element (second switch device)
6: heat dissipating member, 11: cover (case), 13: assembled battery (internal battery)
15: Base case (case), 15a2, 15a3: Mounting part 17: External battery, AR1, AR2, AR: Heat dissipation path area

Claims (7)

An internal battery (13) housed in the case (11, 15);
A first switch device (3) for controlling the input and output of electric power to and from an external battery (17) installed at a location separate from the internal battery;
A second switch device (4) for controlling input and output of power to and from the internal battery;
A heat dissipating member made of a material having thermal conductivity, wherein the heat dissipating member is provided so that heat from each of the first switch device and the second switch device can move to the first switch device and the second switch device. 6)
A mounting portion provided on the case so that heat from the heat radiating member can move, the mounting portion being directly or indirectly mounted on the vehicle-side member in a configuration capable of radiating heat to the vehicle-side member (7). (15a2, 15a3),
A circuit board (2) for controlling charging and discharging of the internal battery;
With
The external shape of each of the first switch device and the second switch device in a state where the internal battery is viewed from the case in a direction orthogonal to an arrangement direction of the internal battery and the heat radiating member; Each of the switch devices is installed outside a heat radiation path area (AR1, AR2) formed by connecting the outer shape of the mounting portion closest to the switch device ,
The respective exterior parts (30) of the first switch device and the second switch device are installed in a state separated from the circuit board,
The battery device, wherein the first switch device, the second switch device, the heat radiating member, and the mounting portion are provided at a position below and below the circuit board .   The internal battery is configured such that the outer shape of each of the first switch device and the second switch device, and both the first switch device and the second switch device, in a state where the case is viewed from above, 2. The battery device according to claim 1, wherein the battery device is installed outside a heat radiation path area (AR1, AR2) formed by connecting the outer shape of the mounting portion at the closest position. An internal battery (13) housed in the case (11, 15);
A first switch device (3) for controlling the input and output of electric power to and from an external battery (17) installed at a location separate from the internal battery;
A second switch device (4) for controlling input and output of power to and from the internal battery;
A heat dissipating member made of a material having thermal conductivity, wherein the heat dissipating member is provided so that heat from each of the first switch device and the second switch device can move to the first switch device and the second switch device. 6)
A mounting portion provided on the case so that heat from the heat radiating member can move, the mounting portion being directly or indirectly mounted on the vehicle-side member in a configuration capable of radiating heat to the vehicle-side member (7). (15a2),
A circuit board (2) for controlling charging and discharging of the internal battery;
With
The internal battery is formed by combining the first switch device and the second switch device in a state where the case is viewed in a direction orthogonal to an arrangement direction of the internal battery and the heat radiating member. A heat radiation path area (AR) formed by connecting the outer shape and the outer shape of the mounting portion closest to both the first switch device and the second switch device ,
The respective exterior parts (30) of the first switch device and the second switch device are installed in a state separated from the circuit board,
The battery device, wherein the first switch device, the second switch device, the heat radiating member, and the attachment portion are provided at a position below and below the circuit board .   4. The battery device according to claim 1, wherein the attachment portion is provided at a position closest to a specific switch device having a largest flowing current value or a largest heat generation amount. 5. . A specific input / output terminal (140) connected to a specific switch device having the largest flowing current value or the largest calorific value, and another input / output terminal (141);
5. The device according to claim 1, wherein the specific input / output terminal and the other input / output terminal are arranged side by side at a position closer to the specific switch device than another switch device. 6. Battery device. Each of the first switch device and the second switch device has an outer shape in which a width dimension of an exterior part (30) is longer than a thickness dimension,
6. The first switch device and the second switch device are each installed in a posture such that a thickness direction thereof is along a direction in which the internal battery and the heat radiating member are arranged. 7. The battery device according to claim 1. Each of the first switch device and the second switch device has a signal line unit (31) for transmitting an electric signal and a power line unit (32) for transmitting electric power,
The power line unit is not connected to the circuit board, but is connected to an input / output terminal (140, 141) of the internal battery or the external battery via a bus bar (33). The battery device according to any one of claims 1 to 6, which is connected to a circuit board .

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