JP2018063921A - Cell device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cell device capable of suppressing transmission of heat of a switch device for controlling input/output of power to/from a battery.SOLUTION: A cell device 10 includes multiple attachment parts provided so that heat from a heat release member 6 can be transferred, and attached directly or indirectly to a vehicle side member with a configuration capable of releasing heat the vehicle side member. An attachment part 15a2, out of the multiple attachment parts, is at a position closest to a first power element 3, and an attachment part 15a3 is at a position closest to a second power element 4. In a plan view, a battery pack 13 is installed outside a heat radiation path area AR1 formed by connecting an outer shape of the first power element 3 and an outer shape of the attachment part 15a2 at a position closest to the power element. Furthermore, the battery pack 13 is installed outside a heat radiation path area AR2 formed by connecting an outer shape of the second power element 4 and an outer shape of the attachment part 15a3 at a position closest to this power element in the plan view.SELECTED DRAWING: Figure 3

Description

  The disclosure in this specification relates to a battery device.

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

Japanese Patent Laying-Open No. 2015-153675

  In the battery unit of Patent Document 1, the heat generated by the switch unit SW1 is transferred to the base via the control board and transmitted to the base, and is moved to the vehicle side member via the mounting unit closest to the switch unit SW1. At the outside. The assembled battery module is installed in a straight path that connects the switch unit SW1 and the closest mounting unit when the battery unit is viewed in plan. Because of this configuration, the heat transfer path between the mounting part closest to the switch part SW1 and the switch part SW1 in plan view is likely to be shorter than the heat transfer path between any other mounting part and the switch part SW1. There is a possibility that the heat generation of the switch part SW1 may be transmitted to the assembled battery module while moving to the closest mounting part. 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 capable of suppressing heat of a switch device that controls input / output of electric power to / from the battery from being transmitted to the battery.

  A plurality of aspects disclosed in this specification adopt different technical means to achieve each purpose. In addition, the reference numerals in the parentheses described in the claims and in this section are examples showing the correspondence with the specific means described in the embodiments described later as one aspect, and limit the technical scope. is not.

One of the disclosed battery devices is a first device that controls input / output of electric power to / from an internal battery (13) housed in a case and an external battery (17) installed in a separate location away from the internal battery. 1 switch device (3), a second switch device (4) for controlling input / output of electric power to / from the internal battery, and a heat radiating member formed of a material having thermal conductivity, the first switch A heat dissipating member (6) provided so that heat from each of the device and the second switch device can move, and heat from the heat dissipating member are provided on the base portion (15a) of the case so as to be movable. A mounting portion (15a2, 15a3) that is directly or indirectly attached to the vehicle side member in a configuration that can dissipate heat to the vehicle side member (7),
The internal battery has the outer shape of each of the first switch device and the second switch device in the state of viewing the case in a direction orthogonal to the arrangement direction of the internal battery and the heat radiating member, and the most about each switch device. It is installed outside the heat radiation path area (AR1, AR2) formed by connecting the outer shapes of the mounting portions at close positions.

  According to this battery device, the internal battery is positioned closest to the outer shape of the first switch device and the first switch device in a state where the case is viewed from the direction orthogonal to the arrangement direction of the internal battery and the heat dissipation member. It is installed outside the heat dissipation path area formed by connecting the outer shape of the mounting portion in the. Furthermore, 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. As a result, the internal battery is disposed in a heat dissipation path that generates heat by power input / output control and dissipates the heat of the first switch device and the heat of the second switch device from the heat dissipation 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 the heat of the switch device from being transmitted to the internal battery.

It is the disassembled perspective view which showed the structure of the battery apparatus which concerns on 1st Embodiment. It is a circuit diagram in connection with the battery apparatus of 1st Embodiment. It is the general | schematic top view which showed the state which removed the cover about the battery apparatus. It is the schematic which showed the heat dissipation path | route which the heat | fever of a power element transfers about a battery apparatus. It is the schematic which showed the thermal radiation path | route which the heat | fever of a power element transfers about the other example with respect to the battery apparatus of FIG. FIG. 6 is a schematic diagram showing a heat dissipation path through which heat of the power element is transmitted to the mounting portion in the battery device shown 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 showing another example of the heat dissipation path area shown in FIG. 7. FIG. 8 is a schematic plan view showing another example of the heat dissipation path area shown in FIG. 7. It is the general | schematic top view which showed the state which removed the cover about the battery apparatus of 2nd Embodiment. It is the schematic which showed the thermal radiation path | route which the heat | fever of a power element transfers to an attaching part about the battery apparatus of 3rd Embodiment. FIG. 12 is a schematic plan view showing a heat dissipation path area for the battery device shown in FIG. 11. It is a circuit diagram in connection with the battery apparatus of 4th Embodiment.

  Hereinafter, a plurality of modes for carrying out the present disclosure will be described with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration. Not only combinations of parts that clearly indicate that combinations are possible in each form, but also forms may be partially combined even if they are not clearly specified, as long as there is no problem with the combination. Is possible.

(First 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 electric devices 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, the battery device 10 is used for a vehicle such as a hybrid vehicle that uses a combination of an internal combustion engine and a battery-driven motor as a travel drive source, and an electric vehicle that travels by a battery-driven motor. 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 single cells, a circuit board 2 that performs charge / discharge control and the like in the assembled battery 13, and a suppression plate that restrains the assembled battery 13 from above. 12 and a case for housing the assembled battery 13 and the like. The battery device 10 is installed in a space between a rear seat and a trunk room, and a space between a driver seat and a passenger seat, for example, under a car seat. The case has a rectangular parallelepiped shape, and includes a base case 15 fixed to a place where the battery device 10 is mounted 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 made of metal, such as aluminum, copper, or an alloy thereof, or are made of 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 facing each other so that the assembled battery 13 is located below the circuit board 2, and each is fixed by screwing the base case 15 or the like. By attaching the cover 11 to the base case 15 from above, the assembled battery 13 and the circuit board 2 are accommodated in the case.

  The battery device 10 includes a terminal block unit 14 that inputs and outputs power and a connector portion that is 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 14 </ b> A includes a first input / output terminal 140 connected to the external battery 17 side in FIG. 2 and a terminal block that supports the first input / output terminal 140. The terminal block unit 14B includes a second input / output terminal 141 connected to the rotating machine 19 side in FIG. 2 and a terminal block that supports 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 that supports the third input / output terminal 142 connected to the electric load 18B side in FIG. Each terminal block is made of an insulating resin material. The terminal block unit 14 </ b> A and the terminal block unit 14 </ b> B are fixed to the base case 15 at positions where they are arranged side by side. The terminal block unit 14 </ b> C has a terminal block fixed to the base case 15.

  An external battery 17 and an electrical load 18A are connected to the first input / output terminal 140 of the terminal block unit 14A via a harness. A 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. An electrical load 18B is connected to the third input / output terminal 142 of the terminal block unit 14C via a harness. A vehicle ECU that can communicate with the control unit 100 is connected to the connector unit, and the connector unit is configured to be connectable to various electric loads to be supplied with power from the battery device 10. Each terminal block unit and the connector part are provided in the outer peripheral part of the case, and are provided in a state exposed to the outside of the battery device 10.

  The control unit 100 is a device that manages at least the amount of electricity stored in the assembled battery, and may be a battery management unit. In addition, the battery management unit may be a device that monitors current, voltage, and temperature related to the assembled battery, and manages abnormality of the single battery, leakage current, and the like. The battery management unit is configured to be able to communicate with various electronic control devices mounted on the vehicle. The battery management unit may receive a signal related to the current value detected by the current sensor, or may be a control device that controls the operation of the main relay or the precharge relay. 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 single battery. The battery management unit is configured to be able to communicate with various electronic control devices (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 18 </ b> A, an electric load 18 </ b> B, a first power element 3, a second power element 4, 3 power element 300, 4th power element 400, control part 100 grade, etc. are included. The assembled battery 13 is an internal battery installed inside a case that houses the battery device 10, and is composed of, for example, a lithium ion secondary battery. The assembled battery 13 is preferably a secondary battery having low resistance and excellent regenerative performance. The external battery 17 is a secondary battery that is installed outside the case that houses the battery device 10, and is composed of, for example, a lead storage battery. The external battery 17 is installed in a separate place from the internal battery, and is preferably a large capacity secondary battery.

  The assembled battery 13 includes a plurality of single cells connected in series, and these single cells are collected in a predetermined arrangement and accommodated in a case. In this embodiment, as shown in FIG. 1, two first and second battery stacks 13a and 13b are stacked side by side and arranged in two rows. . Each of the five unit cells is a lithium ion secondary battery having a thin rectangular parallelepiped shape, and is installed horizontally with the thickness direction thereof being directed vertically. Each battery stack is connected to be energized by connecting all of the constituent cells in series. All the battery stacks are connected so as to be energized and are integrally connected to each other, thereby functioning as the assembled battery 13 of the battery device 10.

  Components constituting the control unit 100 are mounted on the circuit board 2. The control unit 100 performs switching between on (closed) and off (open) of each switch, which is each power element described above, and thereby controls charging / 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. The external battery 17 and the electric load 18A are connected in parallel to the first input / output terminal 140, and the first power element 3 and the second input / output terminal 141 are connected in series on the opposite side of the external battery 17. Yes. Further, 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 required electric load, and is, for example, a wiper such as a headlight or a front windshield, a blower fan of an air conditioner, a heater for a defroster of a rear windshield, or the like.

  The second power element 4 and the assembled battery 13 are connected in series at a connection portion between the first power element 3 and the second input / output terminal 141. A 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 to the rotating machine 19 in parallel. The first power element 3 that is the first switch device functions as a switch device that switches each of the external battery 17, the electric load 18 </ b> A, and the rotating machine 19 between a state where power can be supplied and a state where power cannot be supplied. The 2nd power element 4 which is a 2nd switch apparatus functions as a switch apparatus which switches the assembled battery 13 and the rotary machine 19 in the state which can supply electric power, and the state which cannot.

  The third power element 300 and the fourth power element 400 are connected in parallel to the third input / output terminal 142, and the electrical load 18B is connected to the opposite side of the third power element 300. The electric load 18B is a constant voltage required electric load 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, an in-vehicle navigation device, an in-vehicle audio device, a meter, or the like.

  A third power element 300 is connected to a connection portion between the first power element 3 and the first input / output terminal 140, and the third power element 300 is further connected to a third input / output terminal 142. The third power element 300 functions as a switch device that switches between a state in which power can be supplied from the external battery 17 to the electrical load 18B and a state in which power cannot be supplied. A connection path between the third power element 300 and the third input / output terminal 142 is provided with a current path that communicates a portion between the second power element 4 and the assembled battery 13. This 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 in which power can be supplied from the assembled battery 13 to the electrical load 18B and a state in which power cannot be supplied.

  The rotating machine 19 includes an electric power generation function for generating electric power, that is, regenerative electric power generation by rotating the crankshaft of the engine, and a power output function for applying a rotational force to the crankshaft, and constitutes an ISG (Integrated Starter Generator). The external battery 17 and the assembled battery 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. The assembled battery 13 is in a state in which power can be supplied from the rotating machine 19 when the second power element 4 is turned on, and regenerative power can be charged. Accordingly, each of the first power element 3 and the second power element 4 forms part of a large current path in which a relatively large current is assumed to flow between the rotating machine 19 and each battery.

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

  At the time of deceleration, the electric power regeneration which collects the kinetic energy reduced by deceleration by the rotating machine 19 is performed. During the power regeneration, the control unit 100 controls the first power element 3 to be in an on state, the second power element 4 to be in an on state, the third power element 300 to be in an off state, and the fourth power element 400 to be in an on state. Thereby, the regenerative power generated by the rotating machine 19 is charged to the assembled battery 13 and the external battery 17 and supplied to the electric load 18A and the electric load 18B.

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

  When restarting from the idling stop state, the rotating machine 19 serves as a starter. At this time, the control unit 100 controls the first power element 3 to be on, the second power element 4 to be off, the third power element 300 to be off, and the fourth power element 400 to be on. The stored power of the external battery 17 is supplied to the rotating machine 19 and to the electric load 18A, and the stored power of the assembled battery 13 is supplied to the electric load 18B. Thereby, 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 is operated by supplying power from the assembled battery 13. For example, the control unit 100 controls the first power element 3 in the off state, the second power element 4 in the on state, the third power element 300 in the on state, and the fourth power element 400 in the 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 assembled battery 13 is supplied to the rotating machine 19.

  When the battery pack 13 is in an assist state such as during acceleration and the stored power of the battery pack 13 is sufficient, 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 assembled battery 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 shows a heat dissipation path through which heat of the power element is transmitted in a schematic view of the inside of the case of the battery device 10 as viewed from the side.

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

  On the base part 15a, the 1st battery laminated body 13a and the 2nd battery laminated body 13b which comprise the assembled battery 13 are installed along with the 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 that are semiconductor elements for power control are mounted on the circuit board 2. The 1st power element 3 and the 2nd power element 4 are semiconductor switching elements, and are an example of the switch apparatus which controls the input / output of the electric power with respect to 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 apparatus, and are made of various materials that can release internal heat generation to the outside. The exterior portion has a flat rectangular parallelepiped shape formed of, for example, resin.

  The base case 15 is integrally provided with a heat dissipating member 6 constituting a part of the heat dissipating path in order to release 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 the flat portion on the upper surface thereof and to be positioned below the first power element 3 and the second power element 4. Therefore, the heat dissipating member 6 is opposed to the exterior portion of the first power element 3 or the second power element 4 with the circuit board 2 sandwiched in a position adjacent to the assembled battery 13. The heat dissipating member 6 and the assembled battery 13 are arranged side by side in the horizontal direction. The first power element 3 or the second power element 4 and the assembled battery 13 positioned above the heat radiating member 6 are installed side by side in the arrangement direction of the heat radiating member 6 and the assembled battery 13.

  The battery device 10 includes a plurality of attachment portions provided in the case so that heat from the heat radiating member 6 can move. The heat dissipating member 6 is configured to be capable of heat transfer 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 with a configuration capable of radiating heat to the vehicle-side member 7.

  As shown in FIGS. 1 and 3, the plurality of attachment portions are an attachment portion 15 a 1, an attachment portion 15 a 2, an attachment portion 15 a 3, and an attachment portion 15 a 4. Each mounting portion is fixed by fixing means such as bolt tightening or screw tightening with respect to the vehicle side member 7, welding, a restraining band, a fitting connection, an engagement or the like. The vehicle-side member 7 is, for example, a frame member that fixes a predetermined device to the vehicle, a member that is coupled to the chassis, a member that supports an interior material that forms the vehicle interior, and the like. The attachment portion 15a1 is provided so as to be located outside the first battery stack 13a. The attachment portion 15a4 is a position facing the attachment portion 15a1 with the assembled battery 13 therebetween, and is provided outside the second battery stack 13b. The attachment portion 15a3 is provided so as to be positioned outside the second power element 4 on the same side wall portion 15c where the attachment portion 15a4 is provided. The attachment portion 15a2 is provided so as to be located outside the first power element 3 in the side wall portion 15c adjacent to the side wall portion 15c where the attachment portion 15a4 and the attachment portion 15a3 are provided.

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

  In this specification, the state in plan view means that when the battery device 10 is installed in a posture in which the assembled battery 13 and the base portion 15a of the base case 15 are positioned in the vertical direction, the assembled battery 13 is placed on the base portion 15a side. It points to the state seen downward. 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 includes a state in which the case is viewed in plan as shown in FIG. 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 in the horizontal direction, in a direction orthogonal to the arrangement direction of the internal battery and the heat dissipation 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 assembled battery 13 and the heat dissipation member 6 may be referred to as a case surface view state.

  As shown in FIG. 3, the assembled battery 13 is formed by connecting the outer shape of the first power element 3 and the outer shape of the attachment portion 15 a 3 located closest to the first power element 3 in the case surface view state. It is installed outside the heat dissipation path area AR1. Furthermore, the assembled battery 13 is outside the heat dissipation 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 the case surface view state. Is installed. The attachment portion closest to the power element is set to an attachment portion where the linear distance from the power element is the shortest in the case surface view state or the plan view state. Moreover, you may make it set the attachment part in the position nearest to a power element to the attachment part from which the creeping distance of the thermal radiation path from a power element to an attachment part becomes the shortest. This heat dissipation path is a path that is the shortest distance from the heat generation of the power element to the attachment portion via the heat dissipation member.

  The assembled battery 13 is installed so that even a part of the assembled battery 13 is not included in the heat dissipation path area AR1 and the heat dissipation path area AR2. Therefore, the assembled battery 13 only needs to be installed so as to be located outside the heat dissipation path area AR1 and outside the heat dissipation path area AR2 in the case surface view state, and the positional relationship is illustrated in FIG. It is not limited to the form to do.

  The terminal block unit 14 </ b> A and the terminal block unit 14 </ b> B are integrated with the case, and are arranged side by side in 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 installed in the case near the mounting portion 15a2 located closest to the first power element 3 rather than the mounting portion 15a3. The terminal block unit 14 </ b> A and the terminal block unit 14 </ b> B may be provided as a part of the case, or may be a component that is separate from the case and attached to the case so as to be integrated with the case. Good.

  The first input / output terminal 140 in the terminal block unit 14 </ b> A and the second input / output terminal 141 in the terminal block unit 14 </ b> B are elements of the first power element 3 and the second power element 4 that have a larger current value or heating value. It is installed near. The form illustrated in FIG. 3 is a case where the first input / output terminal 140 and the second input / output terminal 141 are installed in the vicinity of the first power element 3 where the flowing current value or the heat generation amount is larger. . When the current value or the heat generation amount of the first power element 3 is larger, one terminal of the first input / output terminal 140 and the second input / output terminal 141 connected to the first power element 3 is set as the other terminal. It is preferable to install them side by side.

  Although not shown in FIG. 3, when the current value or the heat generation amount of the second power element 4 is larger, 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 side by side. The amount of heat generated by the element can be confirmed by determining the multiplication of 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, among the first power element 3 and the second power element 4, an element having a larger current value may have a larger calorific value. Further, in the battery device 10, among the first power element 3 and the second power element 4, the element having the larger electrical resistance may increase the amount of heat generated. Depending on the usage situation, for example, the driving situation of the vehicle, the element having the longer current flow time among the first power element 3 and the second power element 4 may generate a large amount of heat. For example, the element that increases the current value or the amount of heat generation may be the first power element 3 depending on whether the driving state of the vehicle is the regenerative state, the idling stop state, the EV creep state, or the assist state. In some cases, a two-power element 4 is obtained.

  The plurality of attachment 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 attachment portions and the vehicle side member 7. The inside of the heat radiating member 6 is a rectangular box having a hollow inside. As indicated by arrows in FIG. 4, the heat generated in each power element moves from the exterior portion to the contact portion of the heat radiating member 6 through the circuit board 2, travels downward from the flat portion of the heat radiating member 6 to the side wall. To do. Further, the 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 through the attachment portion 15a2. Since the assembled battery 13 does not exist in the heat dissipation path of the first power element 3 and the second power element 4 configured in this way, the configuration of the assembled battery 13 due to heat transfer can be suppressed.

  The battery device 10 may be configured to have a heat dissipation path for the power element as shown in FIG. Hereinafter, the content of the battery device 10 shown in FIG. 5 that is different from the configuration shown in FIG. 4 will be described. In the configuration shown in FIG. 5, the heat dissipation member 6 is provided at a position adjacent to the assembled battery 13, and the flat portion of the upper surface of the first power element 3 and the second power element 4 sandwiches the heat conductive member 5. Opposite the exterior. Therefore, the circuit board 2 covers the upper side of the assembled battery 13, but does not have a shape that covers the upper side of the heat dissipation member 6. The thermally conductive member 5 is a member having thermal conductivity and electrical insulation, and 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 portion forming the outer surface of the switch device or the heat radiating member 6, and is composed of, for example, an elastically deformable sheet, gel, grease, or the like. be able to. The heat conductive member 5 allows heat transfer between the power elements 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 the exterior portion to the contact portion of the heat dissipation member 6 through the heat conductive member 5, and from the flat portion of the heat dissipation member 6. It moves down to the side wall. Further, the 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 through the attachment portion located closest to each power element. Also in this case, since the assembled battery 13 does not exist in the heat dissipation path of the first power element 3 and the second power element 4, the configuration of the assembled battery 13 due to heat transfer can be suppressed.

  Next, with respect to each power element, the circuit board 2, the heat conductive member 5, the heat radiating member 6 and the mounting portion 152a are installed in relation to the heat dissipation path and the heat dissipation path area in which the heat of the power element is transmitted to the mounting portion. This will be described with reference to FIG. Note that 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 dissipation member 6 described below.

  As shown in FIG. 6, in the battery device 10, the switch devices such as the first power element 3 and the second power element 4 are connected to the circuit board 2 by the signal line portion 31 in which no current for supplying power flows. On the other hand, it is connected in a state where 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 main body and the power line portion 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 and in a horizontal posture such that the thickness direction thereof is orthogonal to the surface that is the main surface of the circuit board 2. The heat dissipation member 6 is indirectly contacted via the conductive member 5. Therefore, the first power element 3 and the heat radiating member 6 are disposed laterally adjacent to the assembled battery 13 and 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 from which the signal line portion 31 and the power line portion 32 protrude. The element width direction which forms the length between them is installed so as to be 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 protrudes laterally from the exterior portion 30 and then extends so as to bend in a direction orthogonal to the main surface of the circuit board 2 and is connected to the circuit board 2 or mounted on the circuit board 2. Connected to electronic components. The power line portion 32 of the first power element 3 is not connected to the circuit board 2 and 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 accommodated in the base case 15 together with the assembled battery 13 and the like. The bus bar 33 is a conductive plate 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 accommodates 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 structure installed so that the exterior part 30 may contact the heat radiating member 6 directly without passing through the heat conductive member 5 may be sufficient. 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 fastening and fixing with an insulating adhesive such as a silicon adhesive, bolts or screws. The heat dissipating member 6 is installed in a form that allows heat transfer to the base portion 15a in the base case 15 in which the assembled battery 13 is accommodated. With the above configuration, the heat that has moved from the exterior portion 30 of the first power element 3 to the heat radiating member 6 through the thermal conductive member 5 has moved to the base portion 15a, and then to the vehicle side member 7 via the attachment portion 15a2. Released 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 attachment portion 15 a 2 is provided in the case so as to be 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 more heat than the second power element 4, 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 dissipation path area AR1 and the heat dissipation path area AR2 illustrated in FIG. The heat dissipation path area AR1 is formed by connecting the outer shape of the mounting portion 15a2 closest to both the first power element 3 and the second power element 4 and the outer shape of the first power element 3 in a plan view. This is the range surrounded by the two-dot chain line in FIG. Therefore, the attachment portion 15 a 2 is the closest attachment portion for both the first power element 3 and the second power element 4 among the plurality of attachment portions of the battery device 10.

  The heat dissipation path area AR2 is formed by connecting the outer shape of the mounting portion 15a2 and the outer shape of the second power element 4 that are closest to each other for both the first power element 3 and the second power element 4 in a plan view. This is the range surrounded by the two-dot chain line in FIG. In the heat dissipation path area AR1 and the heat dissipation path area AR2, when the heat of each power element moves downward from each power element and reaches the base portion 15a, the heat dissipation path area in FIG. Move all the way. If the assembled battery 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.

  Further, the assembled battery 13 may be installed so as to be located outside the heat dissipation path area AR illustrated in FIG. 7 in a plan view. The heat dissipation path area AR is closest to both the first power element 3 and the second power element 4 in the plan view, and the outer shape formed by combining both the first power element 3 and the second power element 4. This is a range in a rectangle surrounded by a two-dot chain line in FIG. 7 formed by connecting the outer shape of the mounting portion 15a2 at the position. In this heat dissipation path area AR, when the heat of each power element moves downward from each power element and reaches the base portion 15a, it further moves to the attachment portion 15a2 in the direction in which the heat dissipation path area AR in FIG. 7 extends. If the assembled battery 13 is installed at a position that does not belong to the heat dissipation path area AR by this heat dissipation path, the battery device 10 can be provided in which the heat dissipation of the battery is not impaired by the heat generated by the power element.

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

  The form shown in FIG. 8 may be sufficient as the thermal radiation path area in the battery apparatus 10. FIG. As shown in FIG. 8, unlike the configuration shown in FIG. 7, the attachment portion 15 a 2 is provided in the case so as to be closer to the second power element 4 than the first power element 3. Since the positions of the attachment portions 15a2 are different, the heat dissipation path area AR1 and the heat dissipation path area AR2 illustrated in FIG. 8 are different in shape from the heat dissipation path areas illustrated in FIG. According to this configuration, when the second power element 4 generates a larger amount of heat than the first power element 3, heat dissipation from the second power element 4 to the attachment portion 15a2 is improved, which is useful.

  The form shown in FIG. 9 may be sufficient as the thermal radiation path area in the battery apparatus 10. FIG. As shown in FIG. 9, unlike the configuration shown in FIG. 7, the attachment portion 15 a 2 is provided in the case at a position that is the same distance from both the first power element 3 and the second power element 4. In this configuration, the heat dissipation path from the first power element 3 to the mounting portion 15a2 and the heat dissipation path from the second power element 4 to the mounting portion 15a2 can be configured to have the same creepage distance. Therefore, even when any element generates a large amount of heat, it is possible to provide the battery device 10 that does not greatly impair heat dissipation.

  Next, effects obtained by the battery device 10 of the first embodiment will be described. The battery device 10 is formed of an assembled battery 13, a first power element 3 and a second power element 4, which are an example of a switch device, a plurality of attachment portions, and a heat conductive material. And 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 input / output of electric power to / from the external battery 17 installed at a different location from the assembled battery 13. The second power element 4 controls input / output of electric power with respect to the assembled battery 13.

  The battery device 10 includes a plurality of mounting portions that are provided so that heat from the heat radiating member 6 can move and that are directly or indirectly attached to the vehicle side member 7 in a configuration that can radiate heat to the vehicle side member 7. . The mounting portion 15a2 is located closest to the first power element 3 and the mounting portion 15a3 is located closest to the second power element 4 in the state viewed from above. The assembled battery 13 is installed outside the heat dissipation path area AR1 formed by connecting the outer shape of the first power element 3 and the outer shape of the mounting portion 15a2 located closest to the power element in a plan view. Yes. Furthermore, the assembled battery 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 located closest to the power element in a plan view. ing.

  According to the battery device 10, the assembled battery 13 is formed by connecting the outer shape of the first power element 3 and the outer shape of the mounting portion 15 a 2 located closest to the first power element 3 in a plan view. It is installed outside the area AR1. Further, the assembled battery 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 located closest to the second power element 4 in a plan view. Has been. Thereby, the assembled battery 13 does not exist in the heat dissipation path for dissipating the heat of the first power element 3 generated by the input / output control of the electric power related to the external battery 17 from the heat dissipation member 6 to the vehicle side member 7 via the mounting portion 15a2. Configuration can be provided. Further, the assembled battery 13 does not exist in the heat dissipation path for dissipating the heat of the second power element 4 generated by the input / output control of the electric power related to the assembled battery 13 from the heat radiating member 6 to the vehicle side member 7 through 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 in which the battery is thermally affected by the heat generated by the switch device. Thus, since the battery exists in the heat dissipation path | route of a switch apparatus, the battery apparatus 10 can suppress that the heat dissipation of a battery deteriorates by heat dissipation of a switch apparatus.

  The assembled battery 13 has a mounting portion 152a that is closest to the outer shapes of 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. Are installed outside the heat dissipation path area AR1 and the heat dissipation path area AR2, which are formed by connecting the outer shapes.

  According to this configuration, the assembled battery 13 includes the outer shape of the mounting portion 15a2 and the outer shape of the first power element 3 that are closest to each other for 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 tying. Furthermore, the assembled battery 13 is formed by connecting the outer shape of the attachment portion 15a2 and the outer shape of the second power element 4 that 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 AR2. Thus, both the heat of the first power element 3 that generates heat by the power input / output control related to the external battery 17 and the heat of the second power element 4 that generates heat by the power input / output control related to the assembled battery 13 are mounted in common. It is possible to provide a configuration in which the assembled battery 13 does not exist in the heat dissipation path that dissipates heat to the vehicle side member 7 via the portion 15a2. Therefore, the heat of both switch devices is released to the outside of the device via the common mounting portion 15a2, so that the heat transfer to the internal battery of the battery device 10 can be suppressed.

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

  According to this configuration, the assembled battery 13 includes the outer shape of the mounting portion 15a2 that is closest to both the first power element 3 and the second power element 4 in a plan view, and the first power element 3 and the second power element. It is installed outside the heat dissipation path area AR formed by connecting the outer shape formed by combining the elements 4. Thereby, both the heat of the first power element 3 that generates heat by the power control related to the external battery 17 and the heat of the second power element 4 that generates heat by the power control related to the assembled battery 13 are passed through the common attachment portion 15a2. Thus, it is possible to provide a configuration in which the assembled battery 13 does not exist in the heat dissipation path that radiates heat to the vehicle side member 7. Therefore, since the heat of both switch devices is collected in the attachment portion 15a2 and released to the outside of the device, 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 amount of heat generation. 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 heat dissipation amount from the specific switch device can be increased. Therefore, the heat dissipation performance of the battery device 10 can be enhanced.

  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 calorific value, 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 the other switch devices. According to this configuration, the distance to the input / output terminal can be shortened for a specific switch device that generates a large amount of heat, so that the length of the bus bar that connects the specific switch device and the input / output terminal can be shortened. 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 portion of the switch device is installed in a state of being separated from the circuit board 2. According to this configuration, since the exterior portion of the switch device is not in contact with the circuit board 2, the circuit board 2 can be configured not to be included in the heat dissipation path. Thereby, since 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, the heat radiation 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 includes a signal line portion 31 that transmits an electrical signal and a power line portion 32 that transmits power. The power line portion 32 is not connected to the circuit board 2 but is connected to the input / output terminal via the bus bar 33. The signal line portion 31 is a lead terminal that protrudes 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 being soldered to one or both sides of the board through the hole of the board. According to this configuration, since a large current does not flow through the signal line section 31, no large heat transfer from the signal line section 31 to the circuit board 2 occurs, and the power line section 32 is connected to the circuit board 2. Therefore, the heat generated in the power line portion 32 does not move to the circuit board 2. Therefore, the heat generated by the power line portion 32 can be moved to the heat radiating member 6 via the switch device and radiated.

  The heat dissipating member 6 is directly connected to the vehicle side member 7 in a configuration capable of heat transfer to the vehicle side member 7 or connected via a bracket having thermal conductivity. According to this configuration, the heat of the switch device can be moved to the vehicle-side member 7 having a large heat capacity via the heat radiating member 6, so that 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 low position with respect to the circuit board 2. According to this configuration, since the heat of the switch device can be quickly moved downward from the circuit board 2 through the heat radiating member 6, heat radiation to the upper circuit board 2 can be suppressed, and the switch device is mounted on the circuit board 2. The influence of heat on electronic components can be suppressed.

(Second Embodiment)
In 2nd Embodiment, the battery apparatus 110 which is another form with respect to 1st Embodiment is demonstrated with reference to FIG. In FIG. 10, the component which attached | subjected the same code | symbol as drawing of 1st Embodiment is a similar component, and there exists the same effect. Hereinafter, content 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 14 </ b> A and the second input / output terminal 141 of the terminal block unit 14 </ b> B are the first power element 3 and the second power element 4. It is installed near the element whose current value or heat generation amount is larger. The form illustrated in FIG. 10 is a case where the first input / output terminal 140 and the second input / output terminal 141 are installed in the vicinity of the second power element 4 where the flowing current value or the amount of heat generation increases. . When the current value or the heat generation amount of the second power element 4 is larger, the second input / output terminal 141 connected to the second power element 4 is installed in a state where it is aligned with the other first input / output terminal 140. It is preferable.

(Third embodiment)
In the third embodiment, referring to FIG. 11 and FIG. 12, the configuration relating to the thermal connection between the first power element 3 and the second power element 4 and the heat radiating member 6, which is another form with respect to the first embodiment. explain. In each figure, the component which attached | subjected the same code | symbol as drawing of 1st Embodiment is a similar component, and there exists the same effect. Hereinafter, content 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 in such a posture that the thickness direction is along the main surface of the circuit board 2, and the heat conductive member Indirect contact with the heat dissipating member 6 via 5. Each power element is in contact with the heat radiating member 6 in such a manner that the direction in which the signal line portion 31 protrudes from the exterior portion 30 is orthogonal to the main surface of the circuit board 2 so as to allow heat transfer. 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 part 30 may be configured so as to be in direct contact with the heat radiating member 6. The heat dissipating member 6 is provided integrally with the side wall portion 15c in the base case 15 in which the assembled battery 13 is accommodated, and is installed in a configuration that allows heat transfer to the base portion 15a or the attachment portion 15a2 via the side wall portion 15c. ing.

  Similar to FIG. 7, the attachment portion 15 a 2 shown in FIG. 12 is provided in the case so as to be closer to the first power element 3 than to the second power element 4. 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 as in FIG. And the second power element 4 may be provided in the case at the same distance from both. When these structures are adopted, the same operational effects as those of the first embodiment according to FIGS. 7 to 9 can be 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 portion 30 is longer than the thickness dimension. The 1st power element 3 and the 2nd power element 4 are installed with the attitude | position so that the thickness direction may follow the arrangement direction of the assembled battery 13 and the heat radiating member 6. FIG. According to this configuration, by installing the power element vertically, the distance from the power element to the attachment 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 with reference to FIG. 2 in the first embodiment will be described with reference to FIG. In FIG. 13, components given the same reference numerals as those in the drawing of the first embodiment are the same components and have the same operational effects. Hereinafter, content different from the first embodiment will be described.

  The circuit diagram shown in FIG. 13 is configured without the third power element 300 and the fourth power element 400 of the first embodiment. With this configuration, the battery device 10 according to the fourth embodiment does not have a function of controlling power supply from the external battery 17 to the electric load 18B, and does not have a 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 encompasses the illustrated embodiments and variations by those skilled in the art based thereon. For example, the disclosure is not limited to the combination of components and elements shown in the embodiments, and various modifications can be made. 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 embodiment are omitted. The disclosure encompasses parts, element replacements, or combinations between one embodiment and another. The technical scope disclosed is not limited to the description of the embodiments. The technical scope disclosed is indicated by the description of the scope of claims, and should be understood to include all modifications within the meaning and scope equivalent to the description of the scope of claims.

  In the above-described embodiment, the battery device is installed in a form in which the arrangement direction of the assembled battery 13 and the heat dissipating member 6 is a horizontal direction, 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 assembled battery 13 and the heat dissipation member 6 are arranged in 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 seen in the lateral direction.

  In the above-described embodiment, the first power element 3 and the second power element 4 are described as if they were each composed of one element except for FIG. The 1 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 that does not have a semiconductor element and controls input / output of power to / from the battery. The mechanical relay is a switch device that has a coil and a contact part, for example, and realizes a state in which power distribution is permitted by closing the contact part to control power input / output. In the case of a mechanical relay, the exterior part forms a rectangular parallelepiped case made of, for example, resin. As described above, the signal line portion 31 and the power line portion 32 protrude from the outside of the case. Thus, the switch device described in the claims includes a power element, a mechanical relay, and the like.

  In the above-described embodiment, the single battery constituting each of the external battery 17 and the assembled battery 13 is, for example, a nickel hydride secondary battery or an organic radical battery in addition to the lead storage battery and the lithium ion secondary battery described in the first embodiment. You may comprise.

  In the above-described embodiment, the single battery provided in the battery device may have, for example, a thin flat plate shape of the outer case, and the outer case formed of a laminate sheet. The laminate sheet is made of a highly insulating material. In this case, the unit cell has an inner space of a flat container that is sealed by sealing the ends of the laminate sheet that is folded in half, for example, by heat-sealing the ends. The internal space contains a battery main body portion including an electrode assembly, an electrolyte, a terminal connection portion, a part of the positive electrode terminal portion, and a part of the negative electrode terminal portion. Therefore, in the unit cell, the peripheral part of the flat container is sealed, so that the battery main body is housed in a sealed state inside the flat container. The unit cell has a pair of electrode terminals drawn outward from the flat container.

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

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

3 ... 1st power element (1st switch apparatus)
4. Second power element (second switch device)
6 ... Heat dissipation member, 11 ... Cover (case), 13 ... Battery (internal battery)
15 ... Base case (case), 15a2, 15a3 ... Mounting part 17 ... External battery, AR1, AR2, AR ... Heat dissipation path area

Claims (8)

An internal battery (13) housed in the case (11, 15);
A first switch device (3) for controlling input / output of electric power to / from an external battery (17) installed at a location apart from the internal battery;
A second switch device (4) for controlling input / output of electric power to the internal battery;
A heat dissipating member formed of a material having thermal conductivity, the heat dissipating member provided so that heat from each of the first switch device and the second switch device can move. 6) and
A mounting portion provided in the case so that heat from the heat radiating member can be moved, the mounting portion being directly or indirectly attached to the vehicle side member in a configuration capable of radiating heat to the vehicle side member (7). (15a2, 15a3),
With
The internal battery has respective external shapes of 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 dissipation member, A battery device installed outside a heat dissipation path area (AR1, AR2) formed by connecting the outer shape of the mounting portion located closest to each switch device.   The internal battery has the respective external shapes 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. The battery device according to claim 1, wherein the battery device is installed outside a heat dissipation path area (AR1, AR2) formed by connecting the outer shapes of the mounting portions at the closest positions. An internal battery (13) housed in the case (11, 15);
A first switch device (3) for controlling input / output of electric power to / from an external battery (17) installed at a location apart from the internal battery;
A second switch device (4) for controlling input / output of electric power to the internal battery;
A heat dissipating member formed of a material having thermal conductivity, the heat dissipating member provided so that heat from each of the first switch device and the second switch device can move. 6) and
A mounting portion provided in the case so that heat from the heat radiating member can be moved, the mounting portion being directly or indirectly attached to the vehicle side member in a configuration capable of radiating heat to the vehicle side member (7). (15a2),
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 perpendicular to the arrangement direction of the internal battery and the heat dissipation member. A battery installed outside a heat dissipation path area (AR) formed by connecting the outer shape and the outer shape of the mounting portion located closest to both the first switch device and the second switch device apparatus.   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 calorific value. 5. . A specific input / output terminal (140) connected to the specific switch device having the largest flowing current value or the largest calorific value, and another input / output terminal (141),
5. 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. Battery device. Each of the first switch device and the second switch device has an outer shape in which the width dimension of the exterior part (30) is longer than the thickness dimension,
Each of the first switch device and the second switch device is installed in a posture in which a thickness direction is along an arrangement direction of the internal battery and the heat dissipation member. The battery device according to any one of the above.   Each exterior part (30) of a said 1st switch apparatus and a said 2nd switch apparatus is installed in the state spaced apart from the circuit board (2). The battery device described. Each of the first switch device and the second switch device has a signal line portion (31) for transmitting an electrical signal and a power line portion (32) for transmitting power,
The power line portion is not connected to the circuit board, and is connected to an input / output terminal (140, 141) related to the internal battery or the external battery via a bus bar (33), and the signal line portion is The battery device according to claim 7 connected to a circuit board.

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