WO2018070310A1

WO2018070310A1 - Battery device

Info

Publication number: WO2018070310A1
Application number: PCT/JP2017/036054
Authority: WO
Inventors: 山本　康平; 樹西俣; 正登丹羽; 秀宏木下; 井上　美光
Original assignee: 株式会社デンソー
Priority date: 2016-10-14
Filing date: 2017-10-04
Publication date: 2018-04-19

Abstract

This battery device (10) is provided with: a battery pack (13); a circuit board (2) for acquiring battery information pertaining to the battery pack, or for controlling charging and discharging of the battery pack; a switch device that includes a first power element (3), a second power element (4), or the like; and a heat dissipation member (6). The switch device controls the input and output of power to and from the battery pack and is installed such that an exterior part (30) thereof is spaced away from the circuit substrate. The heat dissipation member is made of a thermally conductive material, and directly contacts, or indirectly contacts via a thermally conductive member (5), the exterior part of the switch device so that heat of the switch device is able to move. Thus, the performance of this switch device for controlling the input and output of power to and from the battery can be exhibited.

Description

Battery device

Cross-reference of related applications

The present application includes Japanese Patent Application No. 2016-202937 filed on October 14, 2016 and Japanese Patent Application 2017 filed on September 19, 2017, the disclosures of which are incorporated herein by reference. Based on -179311.

This disclosure relates to a battery device.

Patent Document 1 discloses a battery unit including a power element that controls input / output of electric power to / from an assembled battery. The power element is mounted on the second board portion in the control board at a position that does not overlap the assembled battery.

JP 2014-13724 A

In the battery unit of Patent Document 1, since the power element for power control is mounted on the control board, the battery unit is restricted by the heat resistance temperature related to the control board which is lower than the power element. Due to the restriction on the heat-resistant temperature, it is required to suppress the heat generation of the switch device, and there is a problem that the necessary switch performance cannot be exhibited.

In view of such a problem, an object of the present disclosure is to provide a battery device capable of exhibiting the performance of a switch device that controls input / output of electric power to / from the battery.

According to one aspect of the present disclosure, the battery device includes a battery, a circuit board that is electrically connected to the battery, and a switch device that controls input and output of electric power to the battery, and an exterior portion that forms an outer surface. A switch device installed in a state of being separated from the circuit board, and a heat radiating member formed of a material having thermal conductivity, directly or directly on the exterior of the switch device so that the heat of the switch device can be moved A heat dissipating member that is indirectly in contact with the heat conductive member.

According to this battery device, the switch device is in a state in which the exterior portion is separated from the circuit board, and the exterior portion is directly or indirectly through the heat conductive member so that the heat of the switch device can move. Touching. According to this, since the heat of the switch device moves more quickly to the heat radiating member than to the circuit board, it is not necessary to take measures to suppress the heat generation of the switch device in order to suppress the thermal influence on the circuit board. A device is obtained. Further, it is possible to avoid a situation in which the heat resistance temperature of the circuit board becomes a bottleneck and the performance of the switch device cannot be fully exhibited. Therefore, it is possible to provide a battery device capable of exhibiting the performance of the switch device without being restricted by the heat-resistant temperature of the circuit board.

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 schematic which showed the heat transfer path | route which the heat | fever of a power element transfers about the battery apparatus of 1st Embodiment. It is the side view which showed the relationship with a circuit board, a power element, and a heat radiating member. FIG. 5 is a plan view in plan view in the V direction in FIG. 4. In the battery apparatus of 1st Embodiment, it is the schematic plan view which showed the 1st example about the positional relationship of a battery and a power element. In the battery apparatus of 1st Embodiment, it is the schematic plan view which showed the 2nd example about the positional relationship of a battery and a power element. In the battery apparatus of 1st Embodiment, it is the schematic plan view which showed the 3rd example about the positional relationship of a battery and a power element. It is the side view which showed the relationship between a circuit board, a power element, and a heat radiating member about 2nd Embodiment. It is the side view which showed the relationship between a circuit board, a power element, and a heat radiating member about 3rd Embodiment. It is the side view which showed the relationship between a circuit board, a power element, and a heat radiating member about 4th Embodiment. It is the schematic which showed the heat transfer path | route which the heat | fever of a power element transfers about the battery apparatus of 5th Embodiment. It is the schematic which showed the heat transfer path | route which the heat | fever of a power element transfers about the battery apparatus of 6th Embodiment. It is the side view which showed the relationship between a circuit board, a power element, and a heat radiating member about 6th Embodiment. It is the side view which showed the relationship between a circuit board, a power element, and a heat radiating member about 7th Embodiment. It is the schematic which showed the heat transfer path | route which the heat | fever of a power element transfers about the battery apparatus of 8th Embodiment. It is the schematic which showed the heat transfer path | route which the heat | fever of a power element transfers about the battery apparatus of 9th 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 show that combinations are possible in each embodiment, but also combinations of the embodiments even if they are not explicitly stated unless there is a problem with the combination. Is also possible.

(First embodiment)
The battery device 10 of 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 via a bracket 70 and the like, and a cover 11 attached to the base case 15 so as to cover the base case 15 from above. Prepare. 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 up and down so that the assembled battery 13 is located below the circuit board 2, and each is fixed to the base case 15 with screws 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. 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 external battery 17 and the electric load 18 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. 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. The terminal block unit 14 and the connector portion are provided on the outer peripheral portion 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 (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.

FIG. 3 shows the battery device 10 with the cover 11 removed. 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.

The base case 15 is integrally formed with a heat radiating member 6 for releasing heat generated in the first power element 3 and the second power element 4 which are semiconductor elements for power control 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 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 heat radiating member 6 is provided at a position adjacent to the assembled battery 13, and the flat portion of the upper surface thereof faces the exterior portion of the first power element 3 and the second power element 4 with the heat conductive member 5 interposed therebetween. . The circuit board 2 is electrically connected to each of the assembled battery 13 and the switch device.

The exterior portion corresponds to an exterior case that protects the heart of the device, and is 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 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 each power element and the heat radiating member 6 and is electrically insulated.

The heat dissipating member 6 is connected to the vehicle member 7 via a bracket 70 in a configuration that allows heat transfer to the vehicle member 7 that is a part of the vehicle. The vehicle 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 bracket 70 is formed of a material having thermal conductivity, and is a mounting member that connects the base portion 15 a and the vehicle member 7. The inside of the heat radiating member 6 is a rectangular box having a hollow inside. As indicated by arrows in FIG. 3, the heat generated in each power element moves from the exterior portion to the contact portion with the heat radiating member 6 through the heat conductive member 5, and from the flat portion of the heat radiating member 6 to the side wall of the box Move down. Further, heat is transmitted from the lower end of the side wall to the base portion 15 a and is released to the vehicle member 7 through the bracket 70. Further, the heat radiating member 6 may be directly connected to the vehicle member 7 without the bracket 70 interposed therebetween.

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 that is a motor generator, an electrical load 18, a first power element 3, a second power element 4, and A control unit 100 is 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 preferably a large capacity secondary battery.

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, thereby controlling charging / discharging of the external battery 17 and the assembled battery 13 respectively. As shown in FIG. 4, 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, they are 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 battery device 10 is provided with a first input / output terminal 140 and a second input / output terminal 141 as external terminals. The external battery 17 and the electrical load 18 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. The external battery 17 is connected so as to be able to supply power to the electric load 18. The electric load 18 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 the 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 the external battery 17, the electric load 18, 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 rotating machine 19 includes an electric power generation function for generating electric power, that is, regenerative electric power generation by rotation of the crankshaft of the engine, and a power output function for applying 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 installation relationship relating to the circuit board 2, each power element, the heat conductive member 5, and the heat radiating member 6 will be described with reference to FIGS. 4 and 5. Since the first power element 3 and the second power element 4 have the same configuration with respect to the installation relationship with the circuit board 2 and the like, the first power element 3 will be described as a representative in the following description. Therefore, by replacing the first power element 3 with the second power element 4 in the following description, the installation relationship between the second power element 4 and the circuit board 2 or the like can be described.

As shown in FIGS. 4 and 5, the first power element 3 is positioned laterally below the circuit board 2 so that its thickness direction is orthogonal to the surface that is the main surface of the circuit board 2. It is installed in a standing posture and is indirectly in contact with the heat radiating member 6 via the heat conductive member 5. Therefore, the first power element 3 and the heat radiating member 6 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 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 an outer shape in which the width dimension of the exterior portion 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 dissipating member 6 has a thermal connection portion with the first power element 3 on a surface extending in the lateral direction. Further, the exterior part 30 may be configured so as to be in direct contact with the heat radiating member 6. 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 transferred from the exterior portion 30 of the power element 3 to the heat radiating member 6 through the heat conductive member 5 moves to the base member 15a and then moves to the vehicle member 7 via the bracket 70. Released.

As shown in FIG. 5, the end 20, which is a part of the outer peripheral edge of the circuit board 2, is in a position overlapping the first power element 3 present at a position lower than the circuit board 2. In other words, the first end 30a on the board side that is a part of the outer peripheral edge of the first power element 3 is provided at a position directly below the circuit board 2 and on the opposite side to the first end 30a. The second end portion 30b on the outer side of the substrate is provided so as to be positioned below the circuit board 2 and outside. Therefore, when the first power element 3 and the circuit board 2 are viewed in plan, the first power element 3 has an overlapping portion 30c that overlaps the circuit board 2 and a remaining portion 30d that does not overlap the circuit board 2 below. is set up. Furthermore, from the viewpoint of heat dissipation and ease of connection to the bus bar 33, the first power element 3 and the circuit board 2 are in a positional relationship such that the volume of the remaining portion 30d is equal to or larger than the volume of the overlapping portion 30c. Preferably there is.

The assembled battery 13 includes a plurality of unit cells connected in series, and these unit cells are collected in a predetermined arrangement and accommodated in a battery 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.

Next, the positional relationship between the assembled battery 13 and the switch device in the battery device 10 will be described with reference to FIGS. The assembled battery 13 of the example shown in FIG. 6 is a case where it is comprised by one battery laminated body. In this case, the element group including the first power element 3 and the second power element 4 is a predetermined area AR1 in the battery device 10 adjacent to the battery stack in plan view, and the width of the battery stack. It is installed so that part or all of the elements are included in a range occupying the same length. The first power element 3 and the second power element 4 include at least a part of the element in an area AR1 adjacent to the electrode terminal 130 in the battery stack in the projecting direction of the electrode terminal 130 in plan view. preferable. According to the assembled battery 13 having this configuration, the distance to the battery, the power element, and the input / output terminal can be shortened. The assembled battery 13 illustrated in FIG. 6 is configured by a plurality of single cells stacked in the vertical direction, but may be configured by a plurality of single cells stacked in the horizontal direction.

7 is a case where the assembled battery 13 in the example shown in FIG. 7 is composed of two battery stacks in which the same number of unit cells are stacked. In this case, the element group including the first power element 3 and the second power element 4 is a predetermined area AR2 in the battery device 10 adjacent to the two battery stacks in plan view, and includes two pieces. It is installed so that a part or all of the elements are included in a range that occupies the same length as the length of the battery stack in the arrangement direction. The first power element 3 and the second power element 4 may include at least a part of the element in an area AR2 adjacent to the electrode terminal 130 in the battery stack in the projecting direction of the electrode terminal 130 in plan view. preferable. The assembled battery 13 shown in FIG. 7 is configured by a plurality of single cells stacked in the vertical direction, but may be configured by a plurality of single cells stacked in the horizontal direction.

8 is a case where the assembled battery 13 in the example shown in FIG. 8 is configured by two

battery stacks

13a and 13b in which different numbers of unit cells are stacked. In this case, the element group including the first power element 3 and the second power element 4 has a predetermined internal structure in the battery device 10 adjacent to the first battery stack 13a having the smaller number of unit cells in plan view. In the area AR3, a part or all of the elements are included in a range that occupies the same length as the width of the first battery stack 13a. According to the assembled battery 13 having this configuration, the power element is installed in a location close to the first battery stack 13a having a small number of cell stacks and a small amount of heat generation among the plurality of battery stacks. Thermal bias can be suppressed.

The first power element 3 and the second power element 4 include at least a part of the element in an area AR3 adjacent to the electrode terminal 130 in the battery stack 13a in the projecting direction of the electrode terminal 130 in plan view. Is preferred. The assembled battery 13 shown in FIG. 8 is configured by a plurality of single cells stacked in the vertical direction, but may be configured by a plurality of single cells stacked in the horizontal direction. Each of the assembled batteries 13 shown in FIGS. 6 to 8 may be configured so that the protruding direction of the electrode terminal 130 is not the lateral direction but the upward or downward direction.

Next, effects obtained by the battery device 10 of the first embodiment will be described. The battery device 10 includes a battery pack 13, a circuit board 2 that acquires battery information related to the battery pack 13, or controls charging / discharging of the battery pack 13, and a switch that includes the first power element 3, the second power element 4, and the like. The apparatus and the heat radiating member 6 are provided. The switch device is a device that controls input / output of electric power to / from the assembled battery 13, and is installed in a state where the exterior portion 30 is separated from the circuit board 2. The heat radiating member 6 is a member having a thermal conductivity, and is in direct contact with the exterior portion 30 of the switch device directly or indirectly through the heat conductive member 5 so that the heat of the switch device can be moved. .

According to this battery device 10, the switch device is in a state in which the exterior portion 30 is separated from the circuit board 2, and the exterior portion 30 is directly or via the heat conductive member 5 so that the heat of the switch device can be moved. Indirect contact with the heat dissipating member 6. Thereby, the heat of the switch device can be moved to the heat radiating member 6 more quickly than the heat to the circuit board 2. For this reason, in order to prevent the temperature of the circuit board 2 from significantly increasing due to the heat generated by the switch device, it is possible to realize the battery device 10 that does not require any means for suppressing the heat generated by the switch device. Moreover, since the heat-resistant temperature of the circuit board 2 becomes a bottleneck and the situation where the performance of the switch device cannot be sufficiently exhibited can be avoided, the high-power battery device 10 can be realized. As described above, the battery device 10 capable of exhibiting the performance of the switch device so as not to be restricted by the heat-resistant temperature of the circuit board 2 can be provided.

The switch device has a signal line portion 31 that transmits an electric signal and a power line portion 32 that transmits electric power. The power line portion 32 is not connected to the circuit board 2 but is connected to the input /

output terminals

140 and 141 related to the battery 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 member 7 with a configuration capable of heat transfer to the vehicle member 7 which is a part of the vehicle, or is connected via a bracket 70 having thermal conductivity. According to this configuration, since the heat of the switch device can be moved to the vehicle member 7 having a large heat capacity via the heat radiating member 6, the heat of the switch device can be quickly released to the outside of the battery device 10. Further, heat can be easily radiated using the vehicle member 7 without using a dedicated cooler.

The heat dissipating member 6 is installed in a configuration capable of heat transfer to the base portion 15a having thermal conductivity in the base case 15 in which the battery is accommodated. According to this configuration, the heat of the switch device can be moved to the outside of the battery device 10 through the entire bottom portion of the case that accommodates the battery, so that the heat of the switch device can be quickly released to the outside.

The switch device and the heat dissipating member 6 are spaced apart from the circuit board 2 at a low position. According to this configuration, the heat of the switch device can be quickly moved downward from the circuit board 2, so that the heat radiation to the upper circuit board 2 is suppressed and the electronic components mounted on the circuit board 2 can be suppressed. The heat effect of can be suppressed.

The switch device and the heat radiating member are spaced apart from each other at a high position with respect to the circuit board 2. According to this configuration, the heat of the switch device can be quickly moved upward from the circuit board 2 using the heat rise. Thereby, the heat radiation to the lower circuit board 2 can be suppressed, and the thermal influence on the electronic component mounted on the circuit board 2 can be suppressed.

When the switch device and the circuit board 2 are viewed in plan, the switch device is installed so as to have an overlapping portion 30c that overlaps the circuit board 2 in the switch device and a remaining portion 30d that does not overlap the circuit board 2 in the switch device. Yes. The switch device is installed so that the volume of the remaining portion 30d is equal to or greater than the volume of the overlapping portion 30c. According to this configuration, it is possible to provide a configuration in which heat radiation from the surface of the exterior portion 30 of the switch device is not easily transmitted to the circuit board 2.

The assembled battery 13 is installed so that the electrode terminal 130 is exposed in the lateral direction. The switch device is installed closer to the electrode terminal 130 with respect to the assembled battery 13. According to this structure, the battery apparatus 10 which can shorten the distance of the electricity supply path | route which reaches a battery, a switch apparatus, and an input-output terminal can be provided.

The switch device is installed closer to the battery stack 13a having a smaller number of unit cells among the plurality of battery stacks. According to this configuration, since the switch device can be installed at a location close to the battery stack 13a having a small number of layers and a small amount of heat generation, it is possible to provide the battery device 10 that suppresses unevenness of the heat generation area in the battery device 10 as a whole.

The switch device includes a first switch device that controls input / output of power to / from an external battery 17 provided outside the battery device 10, and a second switch that controls input / output of power to / from a battery included in the battery device 10. And a switch device. According to this configuration, the heat of the first switch device that controls input / output of power to / from the external battery 17 and the heat of the second switch device that controls input / output of power to / from the battery included in the battery device 10 are dissipated. The member 6 can be quickly moved and released. Therefore, it is possible to provide the battery device 10 capable of exhibiting the performances of both the first switch device and the second switch device so as not to be restricted by the heat-resistant temperature of the circuit board 2.

(Second Embodiment)
In 2nd Embodiment, the battery apparatus provided with the heat radiating member 106 which is another form with respect to 1st Embodiment is demonstrated with reference to FIG. In FIG. 9, the 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. The heat radiating member 106 has the same effect as the heat radiating member 6 of the first embodiment. Hereinafter, content different from the first embodiment will be described.

As shown in FIG. 9, the heat dissipation member 106 is indirectly in contact with the exterior portion 30 of the first power element 3 via the heat conductive member 5 so that the heat of the first power element 3 can move. . Moreover, the structure installed so that the heat radiating member 106 may contact the exterior part 30 directly may be sufficient. The heat dissipating member 106 has a heat dissipating path for dissipating the heat transferred from the exterior portion 30 of the first power element 3 through the heat conductive member 5 to the surrounding air from a plurality of fin portions, for example. As with the heat radiating member 6, the heat radiating member 106 is formed of a material having thermal conductivity, for example, various metals such as aluminum, copper, and alloys thereof.

(Third embodiment)
In the third embodiment, a configuration related to the thermal connection between the first power element 3 and the heat dissipation member 206, which is another embodiment of the first embodiment, will be described 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. The heat radiating member 206 has the same effects as the heat radiating member 6 of the first embodiment. Hereinafter, content different from the first embodiment will be described.

As shown in FIG. 10, the first power element 3 is installed in such a posture that the thickness direction is along the main surface of the circuit board 2, and indirectly through the heat conductive member 5. 206 is in contact. The first power element 3 is in contact with the heat radiating member 206 so as to be capable of heat transfer in a vertical posture such 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. Therefore, the heat radiating member 206 has a thermal connection portion with the first power element 3 on a surface extending in the vertical direction. Further, the exterior unit 30 may be configured to be in direct contact with the heat dissipation member 206. Similarly to the heat radiating member 6, the heat radiating member 206 is installed in a configuration capable of heat transfer to the base portion 15 a in the base case 15 in which the assembled battery 13 is accommodated.

According to the above configuration, the heat transferred from the exterior portion 30 of the first power element 3 to the heat radiating member 206 through the thermal conductive member 5 moves to the base portion 15a and then passes to the vehicle member 7 via the bracket 70. Released by moving. Further, the heat dissipation member 206 in the third embodiment can be replaced with the heat dissipation member 106 in the second embodiment. According to this replacement, it is possible to configure a heat dissipation path for radiating heat released from the exterior portion 30 of the first power element 3 from the plurality of fin portions to the surrounding air.

According to the third embodiment, the first power element 3, the heat conductive member 5, and the heat dissipation member 206 can be installed directly below or directly above the circuit board 2. For this reason, the size of the battery device 10 in the lateral direction can be reduced. Further, according to the third embodiment, the power line portion 32 protruding from the end located on the opposite side to the end where the signal line portion 31 protrudes in the exterior portion 30 can be separated from the circuit board 2. The influence of noise on the circuit board 2 can be suppressed.

(Fourth embodiment)
In the fourth embodiment, a configuration relating to thermal connection between the first power element 3 and the heat radiating member 206, which is another embodiment of the third embodiment, will be described with reference to FIG. In FIG. 11, components given the same reference numerals as those in the drawings of the above-described embodiment are similar components and have the same operational effects. The heat dissipation member 306 has the same effects as the heat dissipation member 6 and the heat dissipation member 206. Hereinafter, content different from the third embodiment will be described.

As shown in FIG. 11, the first power element 3 is installed in a posture in which the thickness direction is inclined with respect to the main surface of the circuit board 2, and indirectly through the heat conductive member 5. 306 is in contact. The first power element 3 is in contact with the heat radiating member 306 so as to be capable of heat transfer in a slanting posture inclined with respect to the main surface of the circuit board 2. Therefore, the heat dissipation member 306 has a thermal connection portion with the first power element 3 on a surface extending in a direction intersecting with the vertical direction. Further, the exterior unit 30 may be configured to be in direct contact with the heat dissipation member 306. Similarly to the heat radiating member 206, the heat radiating member 306 is installed in a configuration that allows heat transfer to the base portion 15 a of the base case 15 that houses the assembled battery 13.

According to the fourth embodiment, the first power element 3, the heat conductive member 5, and the heat dissipation member 306 can be installed directly below or directly above the circuit board 2. For this reason, the size of the battery device 10 in the lateral direction can be reduced. Moreover, since the power line part 32 can be separated from the circuit board 2 as in the third embodiment, the influence of noise on the circuit board 2 can be suppressed.

(Fifth embodiment)
In the fifth embodiment, a battery device 110 according to another embodiment of the first embodiment will be described with reference to FIG. In FIG. 12, the constituent elements having the same reference numerals as those in the drawing of the first embodiment are the same constituent elements and have the same operational effects. The heat dissipation path from the first power element 3 to the vehicle member 7 in the battery device 110 is the same as that of the battery device 10 of the first embodiment. The battery device 110 has the same effects as the effects provided by the battery device 10 described above in the first embodiment. Hereinafter, content different from the first embodiment will be described.

As shown in FIG. 12, the first power element 3 is installed so as to be located immediately below the circuit board 2. Therefore, the circuit board 2 extends immediately above the first power element 3. 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 signal line portion 31 of the first power element 3 is connected to the circuit board 2.

According to the battery device 110 of the fifth embodiment, since the height position of the first power element 3 is suppressed below the circuit board 2, the heat dissipation path from the first power element 3 to the base portion 15a is configured to be short. be able to. Therefore, since the battery device 110 can be configured with a short heat dissipation path, it contributes to improving heat dissipation.

(Sixth embodiment)
In the sixth embodiment, a battery device 210 according to another embodiment of the first embodiment will be described with reference to FIG. In FIG. 13 and FIG. 14, the component which attached | subjected the same code | symbol as drawing of 1st Embodiment is a similar component, and there exists the same effect. The heat dissipation path from the first power element 3 to the vehicle member 7 in the battery device 210 is different from that of the battery device 10 of the first embodiment. Hereinafter, content different from the first embodiment will be described.

As shown in FIG. 13, the first power element 3 is installed so as to be located immediately above the circuit board 2. Therefore, the circuit board 2 exists immediately below the first power element 3. The first power element 3 is installed in a state of being indirectly in contact with the heat radiating member 406 through the heat conductive member 5. The heat radiating member 406 is provided on the inner surface of the top wall portion of the cover 11 so as to be capable of heat transfer. The cover 11 is made of a material having thermal conductivity, and is attached to the base portion 15a of the base case 15 so as to be capable of heat transfer. The heat transferred from the exterior part 30 of the first power element 3 to the heat radiating member 406 through the heat conductive member 5 is transferred to the side wall part extending downward from the top wall part after being transferred to the top wall part of the cover 11 and the base part. After moving to 15a, it is released by moving to the vehicle member 7 via the bracket 70.

As shown in FIG. 14, 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 harness 133. The signal line portion 31 is connected to the circuit board 2. As shown by a broken line in FIG. 14, the end 20, which is a part of the outer peripheral edge of the circuit board, is in a position overlapping the first power element 3 present at a position higher than the circuit board 2. In other words, the first end 30a on the substrate side that is part of the outer peripheral edge of the first power element 3 is provided at a position directly above the circuit board 2, and on the opposite side to the first end 30a. The second end portion 30b on the outside of the substrate that is positioned is provided so as to be positioned above the circuit board 2 and outside. Therefore, when the first power element 3 and the circuit board 2 are viewed in plan, the first power element 3 includes an overlapping portion 30c that overlaps the circuit board 2 in the first power element 3 and the circuit board 2 in the first power element 3. It is installed so as to have a remaining portion 30d that does not overlap. Furthermore, the first power element 3 and the circuit board 2 are preferably in a positional relationship such that the volume of the remaining portion 30d is equal to or larger than the volume of the overlapping portion 30c.

According to the sixth embodiment, since the distance between the circuit board 2 to which the signal line portion 31 is connected and the power line portion 32 can be secured, the influence of noise on the circuit board 2 can be suppressed and the overlapping portion 30c. This contributes to the downsizing of the battery device 210. In addition, by allowing the power line portion 32 to protrude outward from the circuit board 2, it is possible to provide a configuration that facilitates coupling of the power line portion 32 and the harness 133. Since heat of the first power element 3 is more easily transmitted in the upper direction than in the lower direction, it contributes to improving the heat dissipation of the first power element 3.

(Seventh embodiment)
7th Embodiment demonstrates the battery apparatus 210 of 6th Embodiment about FIG. 15 which is the state installed vertically with respect to the vehicle member 7. FIG. In FIG. 15, components given the same reference numerals as those in the drawings of the above-described embodiment are similar components and exhibit the same operational effects. The heat dissipation path from the first power element 3 to the vehicle member 7 in the battery device 210 installed as in the seventh embodiment is the same as in the sixth embodiment. The battery device 210 of the seventh embodiment has the same functions and effects as those described above in the sixth embodiment.

(Eighth embodiment)
In the eighth embodiment, a battery device 310 according to another embodiment of the first embodiment will be described with reference to FIG. In FIG. 16, the 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. The heat dissipation path from the first power element 3 or the second power element 4 to the vehicle member 7 in the battery device 310 is the same as that of the battery device 10 of the first embodiment. The battery device 310 has the same effects as the effects provided by the battery devices of the first embodiment and the fifth embodiment. Hereinafter, differences from the first embodiment and the fifth embodiment will be described.

As shown in FIG. 16, the heat dissipation member 6 included in the battery device 310 forms a part of the base case 115. The heat dissipating member 6 forms a standing wall portion that stands up from the base portion 15 a that is the bottom portion of the base case 115. The heat radiating member 6 is made of the same material as that of the base case 115 and is made of, for example, aluminum, copper, or an alloy thereof. The 1st power element 3 and the 2nd power element 4 are installed in the state which the exterior part contacted directly or indirectly through the heat conductive member 5 to the standing wall part which stands up from the base part 15a. In addition, the first power element 3, the second power element 4, and the heat radiating member are spaced apart from the circuit board 2 as shown in FIG. On the other hand, it is good also as a structure spaced apart and installed in the high position.

According to the battery device 310 of the eighth embodiment, the heat radiating member 6 is a standing wall portion that is a part of the base case 115 and is formed to stand up from the base portion 15a. According to this configuration, since the heat radiating member 6 is a part of the base case 115, the resistance of heat transfer from the heat radiating member 6 to the base case 115 can be suppressed, and the heat dissipation of the switch device can be improved. Since the heat radiating member 6 is a part of the base case 115 and is a standing wall portion that stands up from the base portion 15a, the standing wall portion can prevent the switch device from being in a flooded or flooded state. Further, the standing wall portion for protecting the assembled battery 13 from being flooded or flooded can be used as the heat radiating member 6, and the battery device 310 can be downsized and the number of parts can be reduced.

The exterior portion of the switch device is in direct contact with the upper surface of the standing wall portion that is the heat radiating member 6 or indirectly through the heat conductive member 5. According to this configuration, since the switch device can be installed at a high position using the standing wall portion, it is possible to provide the battery device 310 in which the switch device is unlikely to be flooded or flooded.

(Ninth embodiment)
In the ninth embodiment, a battery device 410 according to another embodiment of the first embodiment will be described with reference to FIG. In FIG. 17, 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. The heat dissipation path from the first power element 3 or the second power element 4 to the vehicle member 7 in the battery device 410 is the same as that of the battery device 10 of the first embodiment. The battery device 410 has the same effects as the effects provided by the battery devices of the first embodiment and the eighth embodiment. Hereinafter, differences from the first embodiment and the eighth embodiment will be described.

As shown in FIG. 10, 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 standing wall that stands up from the base portion 15 a. The heat-dissipating member 6 forming a portion is indirectly in contact with the heat-conductive member 5. The first power element 3 and the second power element 4 are in contact with the heat radiating member 6 so as to be capable of heat transfer in such a vertical posture that the direction in which the signal line part protrudes from the exterior part is orthogonal to the main surface of the circuit board 2. is doing. The 1st power element 3 and the 2nd power element 4 are installed in the side surface 60 of the standing wall part which stands up from the base part 15a. Therefore, the heat dissipating member 6 that is the standing wall portion has an inner side surface 60 that faces the assembled battery 13 while extending in a vertical direction at a thermal connection portion with the first power element 3.

Further, the exterior part 30 of the first power element 3 and the exterior part of the second power element 4 may be installed so as to be in direct contact with the standing wall part. In addition, the first power element 3, the second power element 4, and the heat radiating member are spaced apart from the circuit board 2 as shown in FIG. On the other hand, it is good also as a structure spaced apart and installed in the high position.

According to the above configuration, the heat transferred from the exterior portion of each power element to the standing wall portion which is the heat radiating member 6 through the heat conductive member 5 is transmitted in the lateral direction and released from the outer side surface to the atmosphere. Then, after moving to the base portion 15a, it moves to the vehicle member 7 via the bracket 70.

According to the ninth embodiment, the exterior portion of the switch device is in direct contact with the side surface 60 of the standing wall portion, which is the heat radiating member 6, directly or indirectly through the heat conductive member 5. According to this configuration, the heat generated by the switch device can be released to the outside atmosphere through the standing wall portion, and can also be released to the vehicle member 7 through the base portion 15a. These two heat radiation paths can improve heat dissipation, and each heat radiation path can constitute a short path.

According to the battery device 410 of the ninth embodiment, the physique of the battery device 410 is suppressed in the width direction by installing the switch device with the thickness direction of the switch device facing the width direction or the lateral direction of the battery device 410. Can do.

The exterior portion of the switch device is in direct contact with the inner side surface 60 located near the assembled battery 13 in the standing wall portion which is the heat radiating member 6, or indirectly through the heat conductive member 5. According to this configuration, the switch device can be protected from external force, and since the standing wall serves as a barrier against external flooding or water immersion, the waterproof effect of the switch device can be enhanced.

Further, the exterior portion of the switch device may be configured to be in direct contact with the side surface located outside in the standing wall portion that is the heat radiating member 6 or indirectly through the heat conductive member 5.

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 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. As described above, the switch device of the present disclosure 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, it has been described that the power element and the circuit board 2 have a partially overlapping positional relationship when seen in a plan view. The positional relationship may overlap. The power element and the circuit board 2 may be in a positional relationship that does not overlap at all.

In the above-described embodiment, the unit cell included in the battery device may have, for example, a form in which the outer case is a thin flat plate 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 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.

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

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.

Although the present disclosure has been described with reference to embodiments, it is understood that the present disclosure is not limited to the above-described embodiments and structures. Rather, the present disclosure includes various modifications and modifications within the equivalent scope. In addition, although various elements of the present disclosure have been shown in various combinations and forms, other combinations or forms that include more or fewer elements than those elements, or only one of them. Are within the scope and spirit of the present disclosure.

Claims

A battery (13);
A circuit board (2) electrically connected to the battery;
A switch device for controlling input / output of electric power to the battery, wherein the exterior portion (30) forming the outer surface is installed in a state of being separated from the circuit board; and
A heat dissipating member made of a material having thermal conductivity, so that the heat of the switch device can move, either directly on the exterior portion of the switch device or indirectly through a heat conductive member (5). A heat dissipating member (6, 106, 206, 306, 406) in contact with
A battery device provided.
The switch device includes 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 the input / output terminals (140, 141) related to the battery via a bus bar (33) or a harness (133), and the signal line portion is The battery device according to claim 1 connected to a circuit board.
The heat dissipating member is directly connected to the vehicle member in a configuration capable of heat transfer to a vehicle member (7) which is a part of the vehicle, or is connected via a mounting member (70) having thermal conductivity. Item 3. The battery device according to Item 1 or Item 2.
The heat dissipating member is installed in a configuration capable of heat transfer to the base portion (15a) having thermal conductivity in the base case (15) in which the battery is accommodated, or is formed integrally with the base case. The battery device according to claim 1 or 2.
The battery device according to claim 4, wherein the heat radiating member is a standing wall portion that is a part of the base case and rises from the base portion.
The battery device according to claim 5, wherein the exterior portion of the switch device is in direct contact with the upper surface of the standing wall portion directly or indirectly through the heat conductive member.
The battery device according to claim 5, wherein the exterior portion of the switch device is in direct contact with the side surface (60) of the standing wall portion directly or indirectly through the heat conductive member.
The battery according to claim 5, wherein the exterior portion of the switch device is in direct contact with an inner side surface (60) located near the battery in the standing wall portion, directly or indirectly through the thermal conductive member. apparatus.
The battery device according to any one of claims 1 to 8, wherein the switch device and the heat dissipation member are spaced apart from each other at a low position with respect to the circuit board.
The battery device according to any one of claims 1 to 8, wherein the switch device and the heat dissipation member are spaced apart from each other at a high position with respect to the circuit board.
The switch device includes an overlapping portion (30c) that overlaps the circuit board in the switch device and a remaining portion (30d) that does not overlap the circuit board in the switch device when the switch device and the circuit board are viewed in plan. The battery device according to any one of claims 1 to 5, wherein the battery device is installed so as to have.
The battery device according to claim 11, wherein the volume of the remaining portion is equal to or greater than the volume of the overlapping portion.
The switch device has an outer shape in which a width dimension of the exterior part is longer than a thickness dimension,
The battery device according to any one of claims 1 to 12, wherein the switch device is installed in a posture such that a thickness direction thereof is along or inclined with respect to a main surface of the circuit board. .
The battery is installed such that the electrode terminal (130) is exposed in the lateral direction,
The battery device according to any one of claims 1 to 13, wherein the switch device is disposed closer to the electrode terminal with respect to the battery.
The battery includes a plurality of battery stacks (13a, 13b) in which a plurality of single cells are stacked,
15. The switch device according to claim 1, wherein the switch device is installed closer to the battery stack (13 a) having a smaller number of stacked single cells among the plurality of battery stacks. 15. The battery device described.
The switch device includes a first switch device (3) for controlling input / output of power to / from an external battery (17) provided outside the battery device, and input of power to the battery included in the battery device. The battery device according to any one of claims 1 to 15, comprising a second switch device (4) for controlling an output.