WO2019008899A1

WO2019008899A1 - Battery device

Info

Publication number: WO2019008899A1
Application number: PCT/JP2018/018303
Authority: WO
Inventors: 英晃大川; 松永　健
Original assignee: 株式会社デンソー
Priority date: 2017-07-06
Filing date: 2018-05-11
Publication date: 2019-01-10
Also published as: JP2019016511A; JP6747394B2

Abstract

This battery device is provided with: a plurality of single batteries (20); a battery case (21) for accommodating the plurality of single batteries; a fan device (3) provided outside the battery case and drawing air outside the battery case into the battery case to form an air flow which cools the plurality of single batteries; and electronic components (4, 5) provided outside the battery case. The fan device has: an intake section (330) in communication with the inside of the battery case and drawing air outside the battery case through the inside of the battery case; and a discharge section (35) for discharging air in a plurality of different directions. The electronic components are provided downstream of the discharge section in the direction of the air flow.

Description

Battery device

Cross-reference to related applications

This application is based on Japanese Patent Application No. 2017-133049 filed on July 6, 2017, the contents of which are incorporated herein by reference.

The disclosure in this specification relates to a battery device.

Patent Document 1 discloses a battery pack in which air taken into the inside of a casing is brought into contact with a battery to cool the battery, and then brought into contact with an electronic component and then sucked by a blower and discharged out of the casing. ing. The contents of the prior art documents listed as prior art are incorporated by reference as an explanation of technical elements in this specification.

Patent No. 6015573

The device of Patent Document 1 has an electronic component cooling passage inside the case for further bringing air after cooling the battery cell into contact with the electronic component. For this reason, the ventilation resistance is large, and there is room for improvement in terms of cooling performance for cooling both the battery and the electronic component. Furthermore, since the battery cooling passage and the electronic component cooling passage are provided inside the housing, the size of the device is increased.

An object of the disclosure in this specification is to provide a battery device capable of achieving both the cooling performance of the battery and the electronic component and the miniaturization of the device.

Several aspects disclosed in this specification employ different technical means from one another in order to achieve each purpose. Moreover, the code | symbol in the parentheses described in the Claim is an example which shows the correspondence with the specific means as described in embodiment mentioned later as one aspect, Comprising: A technical scope is not limited.

In one aspect of the present disclosure, the battery device is provided outside the battery case, including the plurality of single cells, the battery case for containing the plurality of single cells, and the plurality of battery cases. It comprises an air blower for forming an air flow for cooling a unit cell, and an electronic component provided outside the battery case. The blower has a suction portion communicating with the inside of the battery case and sucking the air outside the battery case via the inside of the battery case, and a blowout portion blowing out the air in a plurality of different directions, and the electronic component is , And the air flow downstream of the blowout portion.

According to this battery device, the air taken into the interior from the outside of the battery case by the suction force of the air blower cools the plurality of single cells, and then is sucked into the air blower and blown out in different directions. Air blown out in a plurality of directions other than one direction can contact the electronic component and cool the electronic component. As described above, the unit cell can be cooled by fresh air from the outside, and there is no need to provide an air passage for cooling the electronic component on the upstream side of the suction portion of the blower. Resistance can be reduced. Since the air flow resistance can be suppressed, the air flow rate can be easily set large, and the ability to cool both the battery and the electronic component can be enhanced. Furthermore, since the electronic components can be installed outside the battery case and around the air blower with a degree of freedom, it is possible to arrange the electronic components utilizing dead space and empty space around the battery case, and downsizing of the battery device Can also contribute to Therefore, according to this battery device, it is possible to achieve both the securing of the cooling performance of the battery and the electronic component and the downsizing of the device.

In one aspect of the present disclosure, the battery device is provided outside the battery case, including the plurality of single cells, the battery case for containing the plurality of single cells, and the plurality of battery cases. It comprises an air blower for forming an air flow for cooling a unit cell, and an electronic component provided outside the battery case. The blower has an intake portion communicating with the inside of the battery case and sucking in the air outside the battery case via the inside of the battery case, and an outlet portion including a plurality of outlets for blowing out the air; Is provided downstream of the air blown out from the outlet.

According to this battery device, the air taken into the interior from the outside of the battery case by the suction force of the blower cools the plurality of single cells, and then is sucked into the blower and blown out from the plurality of outlets. Air blown out from a plurality of points can contact the electronic component to cool the electronic component. As described above, the unit cell can be cooled by fresh air from the outside, and there is no need to provide an air passage for cooling the electronic component on the upstream side of the suction portion of the blower. Resistance can be reduced. Since the air flow resistance can be suppressed, the air flow rate can be easily set large, and the ability to cool both the battery and the electronic component can be enhanced. Furthermore, since the electronic components can be installed outside the battery case and around the air blower with a degree of freedom, it is possible to arrange the electronic components utilizing dead space and empty space around the battery case, and downsizing of the battery device Can also contribute to Therefore, according to this battery device, it is possible to achieve both the securing of the cooling performance of the battery and the electronic component and the downsizing of the device.

It is a perspective view which shows the battery apparatus of 1st Embodiment. It is a figure which shows the flow of air regarding a battery apparatus. The battery apparatus of 1st Embodiment WHEREIN: It is a figure which shows the overlap state of the electronic component and the fan of a ventilation device about the blowing direction. It is a figure which shows another example about the overlapping state of an electronic component and the fan of a blower. In the battery apparatus of 2nd Embodiment, it is a figure which shows the overlap state of an electronic component and a ventilation device about the blowing direction. The battery apparatus of 2nd Embodiment WHEREIN: It is a figure for demonstrating the overlapping state of between the terminals of an electronic component, and a ventilation device about the blowing direction. It is a perspective view which shows the battery apparatus of 3rd Embodiment. It is a perspective view which shows the battery apparatus of 4th Embodiment. It is a perspective view which shows the battery apparatus of 5th Embodiment. It is a perspective view which shows the battery apparatus of 6th Embodiment.

Hereinafter, a plurality of modes for carrying out the present disclosure will be described with reference to the drawings. The same referential mark may be attached | subjected to the part corresponding to the matter demonstrated by the form preceded in each form, and the overlapping description may be abbreviate | omitted. When only a part of the configuration is described in each form, the other forms described above can be applied to other parts of the configuration. Not only combinations of parts that clearly indicate that combinations are possible in each form, but combinations of forms may be partially combined even if they are not specified unless there is a problem in particular. It is possible.

First Embodiment
A battery device 1 according to a first embodiment will be described with reference to FIGS. 1 to 4. Arrows shown in the respective drawings indicate the direction in which air flows. The battery device 1 is used, for example, in a hybrid vehicle that uses an internal combustion engine and a motor driven by electric power charged in the battery as a traveling drive source, an electric vehicle that uses a motor as a traveling drive source, and the like.

The battery device 1 can be installed under a front seat provided in a vehicle compartment of a vehicle or below a rear seat. The battery device 1 can be installed below the front seat and the rear seat with the bottom wall of the battery unit 2 facing downward. Also, the battery device 1 may be installed in the trunk room. The battery device 1 may be installed in a lower area of a trunk room which can store spare tires, tools and the like and which is provided below the trunk room. The plurality of unit cells 20 included in the battery device 1 are, for example, a nickel-hydrogen secondary battery, a lithium ion secondary battery, and an organic radical battery.

The battery device 1 includes a battery unit 2 having a plurality of single cells 20 connected to be conductive, a battery case 21 forming a sealed space, and air provided in the battery case 21 provided outside the battery case 21. And an electronic component. The battery device 1 supplies power to the electric load of the vehicle. The electrical load includes a motor generator that serves as a power source and a power source. For example, when the motor generator performs power running, the battery device 1 is discharged to supply power to the motor generator. When the motor generator generates power, the battery device 1 charges generated power generated by the power generation. The battery device 1 has a battery unit 2A and a battery unit 2B. The two

battery units

2A and 2B have the same configuration, and one or both may be described as the battery unit 2 in this specification. The battery device 1 has a blower 3A and a blower 3B for sucking in air for cooling the cells 20 of the

battery units

2A and 2B. The two

blowers

3A and 3B have the same configuration, and one or both may be described as the blower 3 in this specification.

The unit cell 20 includes a positive electrode terminal and a negative electrode terminal protruding outward from the outer case. Terminals of different polarities in two adjacent single cells 20, which are electrode terminals exposed from the outer case, are electrically connected by a conductive member such as a bus bar. The unit cell 20 is installed in the battery case 21 in such an attitude that the electrode terminals and the bus bar are positioned on the upper side. The bus bar and the electrode terminal are located in the top wall side passage 221. The connection between the bus bar and the electrode terminal is performed by, for example, screwing or welding. Therefore, the total terminal portion of the battery unit 2 disposed at both ends of the plurality of single cells 20 electrically connected by a bus bar or the like receives power from the outside or discharges to other electric devices. .

The cells 20 self-heat at the time of output from which current is taken out and at the time of input to be charged. The battery control device 5 constantly acquires temperature information of the unit cells 20 included in the battery device 1 and the blower 3A so as to control the temperature of the unit cells 20 within a predetermined temperature range based on the temperature of the unit cells 20. And control the operation of the blower 3B. In addition, battery control device 5 applies a voltage controlled to a duty ratio of an arbitrary value included in 0% to 100% with respect to the maximum voltage to each motor 31 of

blowers

3A and 3B to rotate each fan. Change the number. In the battery device 1, by changing the number of rotations of the fan by this duty control, it is possible to adjust the air volume by each of the

blowers

3A and 3B in multiple steps or steplessly.

The electronic components to be cooled included in the battery device 1 include the system main relay 4 and the battery control device 5, which are relay devices for controlling current. Further, the electronic components to be cooled may include a precharge relay which is one of relay devices. The battery control device 5 is electrically connected to various control devices (including an on-vehicle ECU) mounted on the vehicle. The battery control device 5 communicates with the in-vehicle ECU to perform cooperative control. The battery control device 5 outputs the charge state of the battery unit 2 and the like to the in-vehicle ECU. The on-vehicle ECU outputs a command signal to the battery control device 5 based on the state of charge, vehicle information such as the amount of depression of the accelerator pedal input from various sensors mounted on the vehicle and the throttle valve opening, and an ignition switch. . Battery control device 5 controls system main relay 4 based on the command signal to control input / output of power to battery unit 2. The battery control device 5 also controls the cooling of the plurality of single cells 20 in the battery unit 2. The battery control device 5 also instructs the equalization processing of the plurality of single cells 20 in the battery unit 2.

The battery control device 5 may have a function as a battery management unit. The battery management unit is a device that manages the storage amount of at least the single battery 20. The battery management unit is a device that monitors the current, voltage, and temperature related to the single battery 20, and manages an abnormal state of the single battery 20, a leak, and the like. A signal relating to the current value detected by the current sensor is input to the battery management unit. The battery management unit includes an input circuit, a microcomputer, and an output circuit as in the vehicle ECU. Battery information is stored as data in the storage means of the microcomputer. The data of the stored battery information is, for example, the battery voltage, the charging current, the discharging current, and the battery temperature in the battery unit 2. In addition, the battery control device 5 and the battery management unit may be separate devices, and may be configured to be able to communicate with each other by wire or wirelessly.

The battery control device 5 can function as a device that controls the operation of the system main relay 4 and the precharge relay. That is, the battery control device 5 can switch the on state and the off state of the system main relay 4 and the like. The relay device such as the system main relay 4 is energized in the on state, and the relay device generates heat due to the coil heat. The precharge relay is a relay device that has a function of reducing the inrush current to the system main relay 4, and since it incorporates a resistor inside, it becomes a heat generating component that radiates heat to the outside when it is energized.

The battery management unit detects and monitors the output voltage of each unit cell 20 having a correlation with SOC (state of charge). The output voltage (electromotive voltage) is input to the battery control device 5. The battery control device 5 stores the correlation between the SOC and the electromotive voltage. Further, the battery control device 5 may be configured to store the correlation between the SOC, the electromotive voltage, and the battery temperature. The battery control device 5 detects the SOC of each single battery 20 based on the input output voltage and the stored correlation. Based on the detected SOC, battery control device 5 determines whether or not SOC equalization processing is to be performed for the plurality of single cells 20 that make up battery unit 2. The battery control device 5 performs opening / closing control of the switch corresponding to each unit cell 20 according to the execution of the equalization processing based on the determination, and charging / discharging is performed.

The battery unit 2 has a predetermined number of single cells 20 inside a battery case 21. The battery case 21 has a box shape formed of a plurality of wall surfaces surrounding an internal space, and is formed of a molded product of an aluminum plate or an iron plate. The battery case 21 is a case having, for example, six rectangular walls (for example,

side walls

212, 213, 214, 215, a top wall 210, and a bottom wall 211). The

side walls

212 and 213 are walls facing each other, and the

side walls

214 and 215 are walls facing each other and orthogonal to the

side walls

212 and 213.

As shown in FIG. 2, the plurality of unit cells 20 in the battery case 21 are stacked between the side wall 212 and the side wall 213 with intervals between the unit cells 20 adjacent in the thickness direction of the unit cell 20. is set up. Therefore, the plurality of unit cells 20 are stacked in the longitudinal direction of the side wall 214 and the side wall 215.

Between the top wall 210 and the upper surface of the unit cell 20, a top wall side passage 221 extending along the top wall 210 is provided. The side wall 212 is provided with an introduction duct portion 22 for introducing air from the outside of the battery case 21 (for example, the inside of the vehicle interior or the outside of the vehicle interior). The introduction duct portion 22 is preferably provided on the upper portion of the battery case 21, that is, the upper portion of the side wall 212. The introduction duct portion 22 is preferably provided in a place where the ambient temperature does not easily become high. The introduction passage 220 in the introduction duct portion 22 is connected to the ceiling wall side passage 221.

In the gap between the adjacent single cells 20 and the single cells 20, an inter-battery passage 222 through which air flows down while contacting the outer case of the single cells 20 is provided. Therefore, in the battery case 21, a plurality of inter-battery passages 222 extending in the vertical direction are provided in the gaps between the single cells 20 and the single cells 20, respectively. Between the adjacent inter-battery passage 222 and the inter-battery passage 222, an interval of a thickness dimension of the single battery 20 is set. Each unit cell 20 is fixed at a predetermined position in the battery case 21 in order to form the inter-battery passage 222 at a pitch corresponding to the thickness dimension of the unit cell 20. For example, each unit cell 20 is fixed by a spacer member provided between the unit cells 20 and the unit cells 20 adjacent to each other, and the inter-battery passage 222 is formed by the spacer member.

A bottom wall side passage 223 extending along the bottom wall 211 is provided between the lower surface of the unit cell 20 and the bottom wall 211. Each inter-battery passage 222 is connected to the top wall side passage 221 at the top and connected to the bottom wall side passage 223 at the bottom. The bottom wall side passage 223 is connected to a suction passage 320 communicating with the suction port 330 of the blower 3. The bottom wall side passage 223 is a downstream passage located most downstream in the battery case 21. Since the air circulation passage provided inside the battery case 21 is the introduction passage 220, the top wall side passage 221, the inter-battery passage 222, and the bottom wall side passage 223 in this order from the upstream, one end of the air is inside the battery case 21. It flows diagonally downward from the upper part on the side to the lower part on the other end side.

The blower 3 is connected to a bottom wall side passage 223 inside the battery case 21 by a suction duct 32 forming a suction passage 320. The suction passage 320 is provided such that the upstream end thereof is diagonally located with respect to the introduction passage 220. The blower 3 includes a suction unit configured to include a suction port 330, a fan 30 that sucks air through the suction port 330, and a blowing unit 35 that blows air in a plurality of different directions. The blower 3 includes an electric motor 31 for rotating the fan 30, a suction side support plate 33 having a suction port 330 formed therein, and a motor side support plate facing the suction side support plate 33 with the fan 30 interposed therebetween. And 34. A motor 31 supporting the fan 30 in a rotatable state is fixed to the motor side support plate 34. The suction side support plate 33 and the motor side support plate 34 are connected at a plurality of places. The suction duct 32 is connected around the suction port 330 in the suction side support plate 33. The blower 3 has a stable state by the connecting structure with the suction duct 32 and the fixing structure for fixing the suction side support plate 33 and the motor side support plate 34 to the vehicle, the battery case 21 and other members, etc. It is fixed.

The blowout portion 35 is provided radially outside the fan 30 and is provided between the suction side support plate 33 and the motor side support plate 34. The blower 3 preferably has a turbofan which sucks air in the axial direction and blows it out in the centrifugal direction. The blower 3 blows out the air sucked from the suction port 330 in a direction intersecting the rotation axis, and discharges the air radially diffused from the blowout portion 35. The blowout unit 35 can be provided all around the fan 30. In the blower 3, since the suction side support plate 33 and the motor side support plate 34 are rectangular plate members, air can be blown out in at least four directions around the fan 30.

With such a configuration, the blower 3 has high static pressure performance and air volume performance, and can suck air outside the battery case 21 into the suction port 330 via the plurality of narrow inter-battery passages 222. it can. Furthermore, since the blower 3 is installed downstream of the inter-battery passage 222, the fan casing can be eliminated. Therefore, the size of the whole air blower 3 can be miniaturized. Moreover, when the air blower 3 and the air blower which has a casing are comprised to the same physical constitution, the battery apparatus 1 which can enlarge a fan diameter can be provided. Further, according to the blower 3, the fan diameter can be increased, so that the rotational speed can be suppressed in the same physical size and the same air flow rate as the blower having the scroll-like fan casing.

As shown in FIGS. 1 to 3, the blower 3 is provided such that the rotation axis is in the horizontal direction, and the suction port 330 is opened in the horizontal direction. Since the bottom wall side passage 223 is located lower than the center of the suction port 330, the suction passage 320 is a passage extending upward as it goes to the suction port 330 (downstream side). Therefore, the air after cooling the unit cells 20 gathers in the bottom wall side passage 223 and flows down toward the suction passage 320 and flows obliquely upward through the suction passage 320 from a position higher than the bottom wall side passage 223 It sucks into the suction port 330.

The system main relay 4 and the battery control device 5 are provided downstream of the air flow from the blowout unit 35. The system main relay 4 is provided such that at least a part thereof is in a positional relationship facing the blowout portion 35. The battery control device 5 is provided such that at least a part thereof is in a positional relationship facing the blowout unit 35. The system main relay 4 and the battery control device 5 are surrounded by an outer case. The system main relay 4 is mounted above the battery control device 5. The battery control device 5 is shaped so as to protrude in the lateral direction, for example, the blower 3 side than the system main relay 4. The blower 3 is installed such that the system main relay 4 is located downstream of the blowout unit 35 that blows air in the lateral direction, and the battery control device 5 is located downstream of the blowout unit 35 that blows air downward. ing.

The air blown out from the blowout portion 35 facing the system main relay 4 collides with the system main relay 4 and then flows down along the surface of the system main relay 4 and is discharged to the surroundings. The air discharged to the surroundings is discharged to the outside of the vehicle. Further, part of the air flowing downward along the surface of the system main relay 4 contacts the battery control unit 5 to cool the battery control unit 5 and is then discharged to the surroundings. The air blown out from the blowout unit 35 facing the battery control device 5 collides with the battery control device 5 and then flows down along the surface of the battery control device 5 and is discharged to the surroundings (outside the vehicle).

Inside the battery case 21 is formed a circulation path of air forcibly flowing by the blower 3. The flow path is from the outside of the battery case 21 through the introduction passage 220, the top wall side passage 221, the inter-battery passage 222, the bottom wall side passage 223, the suction passage 320, and the suction port 330 of the blower 3, and the outside from the blowout portion 35 It is a route to Therefore, the air cooled in contact with the unit cell 20 flows one way inside the battery case 21 and is discharged outside the battery case 21 (for example, outside the vehicle). A system main relay 4 and a battery control device 5 which are electronic components are installed downstream of the air blown out from the blowout unit 35 of the blower 3. With this configuration, the air blown out from the blowout portion 35 comes into contact with the system main relay 4 and the battery control device 5, and is then discharged out of the vehicle.

As shown in FIG. 3, the battery device 1 includes a box-like case 42 having a system main relay 4 inside. In the case 42, a battery side terminal 40 and a load side terminal 41 project outward. In the case 42, the battery-side surface 422 from which the battery-side terminal 40 protrudes and the load-side surface 423 from which the load-side terminal 41 protrudes are surfaces facing each other with the inside of the case 42 therebetween. Further, inside the case 42, a current sensor, a bus bar coupled to the battery side terminal 40, a bus bar coupled to the load side terminal 41, and the like are accommodated. The battery control device 5 has a control board, an inner connector and an outer connector. The case 42 is assembled with an internal connector electrically connected to the control circuit on the control board. The external connector is connected to the in-vehicle ECU via the wire harness.

The battery side terminal 40 includes an inner side positive electrode bus bar connected to the positive electrode input / output terminal of the battery unit 2 and an inner side negative electrode bus bar connected to the negative electrode input / output terminal of the battery unit 2. The load-side terminal 41 includes an external positive bus bar and an external negative bus bar connected to an electric load.

The inner side positive electrode bus bar and the inner side negative electrode bus bar protrude from the surface 422 on the battery side and extend to the battery unit 2 side. The inner side positive electrode bus bar and the inner side negative electrode bus bar are arranged in the direction in which the blower 3 and the system main relay 4 are aligned. The outer side positive electrode bus bar and the outer side negative electrode bus bar respectively project from the surface 423 on the load side and extend to the opposite side to the inner side positive electrode bus bar. The external side positive electrode bus bar and the external side negative electrode bus bar are arranged in the direction in which the blower 3 and the system main relay 4 are aligned. Each of the outer side positive electrode bus bar and the outer side negative electrode bus bar is located on the battery control device 5 side (lower side) in the height direction than each of the inner side positive electrode bus bar and the inner side negative electrode bus bar.

The end (one end) on the battery unit 2 side of the outer positive electrode bus bar and the end (other end) on the outer side positive electrode bus bar of the inner positive electrode bus bar are separated in the height direction. The electrical connection between one end of the outer positive bus bar and the other end of the inner positive bus bar is controlled by the system main relay 4. The other end opposite to the one end of the outer side positive electrode bus bar is electrically connected to the electric load. The end (one end) on the battery unit 2 side of the outer side negative electrode bus bar and the end (other end) on the outer side negative electrode bus bar side of the inner side negative electrode bus bar are separated in the height direction. Electrical connection between one end of the outer negative bus bar and the other end of the inner negative bus bar is controlled by the system main relay 4. The other end opposite to the one end of the external negative bus bar is electrically connected to the electrical load.

The inner side positive electrode bus bar of the battery side terminal 40 is provided with an inner side positive electrode housing for connecting the positive electrode input / output terminal of the battery unit 2. The inner side negative electrode bus bar of the battery side terminal 40 is provided with an inner side negative electrode housing for connecting the negative electrode input / output terminal of the battery unit 2. At the other end of the external side positive electrode bus bar of the load side terminal 41, an external side positive electrode housing for connecting to a wire harness connected to the electric load is provided. At the other end of the external side negative electrode bus bar of the load side terminal 41, an external side negative electrode housing for connecting to a wire harness connected to an electric load is provided.

The system main relay 4 includes a first switch and a second switch. Each of the first switch and the second switch has an electromagnetic solenoid coil, and generates a magnetic field by energization to control an electrical connection in each of the positive electrode bus bar and the negative electrode bus bar. The first switch and the second switch are in the open state when not energized, and cut off the electrical connection between the positive electrode bus bar and the negative electrode bus bar. That is, the first switch disconnects the external positive bus bar from the internal positive bus bar, and the second switch disconnects the external negative bus bar from the internal negative bus bar. The first switch disconnects the electrical load from the internal positive bus bar, and the second switch disconnects the electrical load from the internal negative bus bar.

The system main relay 4 and the precharge relay generate heat when energized and release heat to the outside. Heat is also dissipated from the wires and exterior case connected to these by heat release. Similarly, in the battery control device 5 as well, various electronic components mounted on the control substrate generate heat by energization and release heat to the outside. By the release of heat, the wires connected to the battery control device 5 and the outer case are also dissipated by heat transfer. It is important from the viewpoints of the life of the battery device 1 and stable performance of the battery device 1 to absorb the heat radiation of these electronic components to lower the temperature of the electronic components. The battery device 1 has the following configuration in order to improve the cooling performance of battery components and to miniaturize the device.

FIG. 3 is a view for explaining the positional relationship between the electronic component and the fan 30 of the blower 3 when the battery device 1 is viewed in the air blowing direction from the blowing portion 35. The fan 30 indicated by a two-dot chain line in FIG. 3 is installed so that the whole thereof overlaps the system main relay 4 provided at a position facing the blowout portion 35. The fan 30 is installed so as to overlap the system main relay 4 provided at a position facing the blowout portion 35 so as to be accommodated inside the outline of the system main relay 4.

In the system main relay 4, the fan 30 indicated by a two-dot chain line in FIG. 3 is installed so as to overlap a hatched portion AR1 of a broken line which is a range occupying between the battery side terminal 40 and the load side terminal 41. The hatched portion AR1 is a range in the height direction (a range between L1 and L2) between the upper end portion of the battery side terminal 40 located above and the lower end portion of the load side terminal 41 located below, Between the battery-side surface 422 and the load-side surface 423 in the lateral direction. According to this configuration, the air blown out from the blowout portion 35 of the blower 3 comes into contact with the hatched portion AR1 between the battery side terminal 40 and the load side terminal 41. In the case 42, since the hatched portion AR1 is an area overlapping a member through which current flows, such as a bus bar, the temperature tends to be high. As described above, since the temperature difference between the blowout air and the portion of the electronic component in contact with the blowout air is large, the cooling efficiency by the exhaust air can be enhanced. The system main relay 4 can be effectively cooled by positively blowing air to this portion.

Further, the positional relationship between the blower 3 and the electronic component may be configured as illustrated in FIG. 4. FIG. 4 is a view for explaining the positional relationship between the electronic component and the fan 30 of the blower 3 when the battery device 1 is viewed in the air blowing direction from the blowing portion 35. The fan 30 indicated by a two-dot chain line in FIG. 4 is installed so as to overlap the system main relay 4 and the battery control device 5 provided in a position facing the blowout portion 35 in its entirety. The configuration shown in FIG. 4 is different from the configuration shown in FIG. 3 in that the fan 30 is installed to overlap the battery control device 5 as well. The fan 30 is installed so as to overlap with the system main relay 4 and the battery control device 5 provided at a position facing the blowout portion 35 so as to fit inside the outer shape of both. According to this configuration, the air blown out from the blowout unit 35 facing the system main relay 4 comes in contact with both the hatched portion AR1 and the battery control device 5. Therefore, in addition to the system main relay 4, the battery control device 5 can be effectively cooled by the blowout air in different directions by hitting the battery control device 5 with the blown air from both the lower direction and the lateral direction. .

The battery device 1 includes a blower 3A and a blower 3B. The blower 3A forms an air flow for cooling the unit cells 20 in the battery unit 2A in contact with air introduced from the outside. The blower 3B forms an air flow for cooling the unit cells 20 in the battery unit 2B in contact with air introduced from the outside. A system main relay 4 and a battery control device 5 are provided between the blower 3A and the blower 3B. The

blowers

3A and 3B blow air from the blowout portion 35 after the cells 20 are cooled in the battery unit 2A and the battery unit 2B, respectively, and contact different portions of the system main relay 4 from different directions. Cool. Therefore, the system main relay 4 is cooled by the exhaust air from the plurality of blowers 3 at different portions. Similarly, the

blowers

3A and 3B respectively blow air from the blowout portion 35 after cooling the single battery 20 in the battery unit, and contact different portions of the battery control device 5 for cooling. Therefore, the battery control device 5 is cooled by the blowing air from the plurality of blowers 3 at different portions. The configurations and effects described with respect to the blower 3 in this specification are configurations and effects that can be applied to each of the blower 3A and the blower 3B.

Next, the operation and effect provided by the battery device 1 will be described. The battery device 1 forms an air flow that cools the plurality of single cells 20 by drawing the air outside the plurality of single cells 20 and the plurality of single cells 20 and the air outside the battery case 21. The air blower 3 and electronic parts provided outside the battery case 21 are provided. The blower 3 has a suction portion communicating with the inside of the battery case 21 and sucking the air outside the battery case 21 via the inside of the battery case 21 and a blow-out portion 35 for blowing the air in a plurality of different directions. . The electronic component is provided downstream of the air flow from the blowout unit 35.

According to this battery device 1, after the air taken into the inside from the outside of the battery case 21 by the suction force of the blower 3 cools the plurality of single cells 20, the air is sucked into the blower 3 and moves in different directions. Be blown out. The air blown out in a plurality of directions other than one direction contacts the electronic component and cools the electronic component. As described above, the unit cell 20 can be cooled by the fresh air from the outside, and since it is not necessary to provide an air passage for cooling the electronic component, the ventilation resistance of the air sucked into the blower 3 can be suppressed. Since the air flow resistance can be suppressed, the air flow rate can be easily set large, so that the ability to cool both the battery and the electronic component can be enhanced. Furthermore, since the electronic components can be installed outside the battery case 21 and around the blower 3, it is possible to arrange electronic components utilizing dead space and empty space around the battery case 21. It can also contribute to the miniaturization of Therefore, according to the battery device 1, it is possible to achieve both the securing of the cooling performance of the battery and the electronic component and the downsizing of the device.

Since it is not necessary to provide the air passage for cooling the electronic components on the upstream side of the suction portion of the blower 3, ie, on the suction side of the blower 3, the battery device 1 Ventilation resistance can be suppressed.

The blower 3 does not have a fan casing for guiding the blowout direction of the blowout air, but has a turbofan that blows out air radially outward of the fan 30. The blower 3 has high static pressure performance and relatively high air volume performance. Therefore, air outside the battery case 21 can be sucked into the suction port 330 via the plurality of narrow inter-battery passages 222, so that the blower 3 capable of securing the battery cooling performance can be obtained. Furthermore, since the blower 3 can eliminate the need for a fan casing for guiding the blowoff air, a compact device can be provided while securing the cooling performance. In other words, since the blower 3 can eliminate the need for a fan casing, a device having the same blower performance can be provided with a small size. Furthermore, since the air blower 3 can freely select the air blowing direction from the blowing portion 35 by the turbo fan, the degree of freedom regarding the arrangement of electronic components utilizing the dead space around the battery case 21 can be further improved. Can also contribute to the miniaturization of

The whole of the fan 30 is installed so as to overlap in the air blowing direction with respect to the electronic component provided at the position facing the blowing portion 35. According to this configuration, since the air blown out from the blowout portion 35 of the blower 3 can be reliably applied to the electronic component, the battery device 1 can be effectively cooled using the air for exhausting the electronic component. it can.

According to the configuration in which the air blown out from the blowout portion 35 of the blower 3 having no fan casing is applied to the electronic component, a passage or a duct for cooling the electronic component is unnecessary. That is, there is no need for parts cost, parts management, assembly process and the like relating to the duct. Therefore, since the number of parts of the battery device 1 can be reduced, the cost for manufacturing and the size of the battery device 1 can be suppressed. In addition, since the electronic component can be installed in an empty space or a dead space in accordance with the position of the blowout unit 35, this contributes to the improvement of the freedom of setting the arrangement space of the electronic component in the battery device 1.

The electronic component includes a battery side terminal 40 connected to the unit cell 20, and a load side terminal 41 provided on a portion of the electronic component facing the portion where the battery side terminal 40 is provided and connected to a load. Have. According to this configuration, in the electronic component, the portion between the battery side terminal 40 and the load side terminal 41 largely dissipates heat by the current. By providing the portion with a large amount of heat release downstream of the air flow rather than the blowout portion 35, it is possible to effectively cool the electronic component through which the large current from the battery unit 2 flows while suppressing the physique of the battery device 1. it can. In addition, since the temperature difference between the blowout air and the portion between the battery side terminal 40 and the load side terminal 41 with which the blowout air contacts is large, the cooling efficiency by the exhaust air can be enhanced.

The fan 30 is installed so as to overlap a portion (hatched portion AR1) that occupies between the battery side terminal 40 and the load side terminal 41 in the electronic component. According to this configuration, since the blowout air from the blowout part 35 can be applied to the hatching part AR1 having a large heat release amount, effectively cooling the high heat generation part in the electronic component while suppressing the physical size of the battery device 1 Can.

The battery device 1 includes at least two

blowers

3A and 3B. Electronic components are provided between the blower 3A and the blower 3A. According to this configuration, the air blown from the

blowers

3A and 3B on both sides can be applied to the electronic component. The cooling performance of the electronic component can be further enhanced because the electronic component can be cooled by air from different directions at least at two different sites.

The electronic component provided downstream of the air blown out from the blowout unit 35 includes a relay device which is a component capable of controlling the current to the plurality of single cells 20. According to this configuration, it is possible to cool the relay device that generates heat when energized, using the exhaust air after battery cooling, and to provide the battery device 1 that can contribute to downsizing of the device and suppression of ventilation resistance. .

The electronic component provided downstream of the air blown out from the blowout unit 35 further includes a battery control device 5 that controls input and output with respect to the plurality of single cells 20. According to this configuration, the heat generation of the control substrate and the mounted electronic component can be released using the exhaust air after battery cooling, and the battery device 1 can be provided in which the exhaust air can be effectively used.

By arranging the system main relay 4 and the battery control device 5, which are electronic components, in a direction intersecting the rotation axis of the fan 30 of the blower 3, the two electronic devices can be suppressed while suppressing the physique of the blower. Exhaust air can be supplied to a wide range of parts. Therefore, the two electronic components can be cooled efficiently.

Second Embodiment
A battery device 1 according to a second embodiment will be described with reference to FIGS. 5 and 6. In each of the drawings, the same components as those in the first embodiment are denoted by the same reference numerals and the same functions and effects can be obtained. The configurations, operations, and effects not particularly described in the second embodiment are the same as those in the first embodiment. Hereinafter, only differences from the first embodiment will be described.

As shown in FIGS. 5 and 6, in the battery device 1 of the second embodiment, the posture of the blower 3 is different from that of the first embodiment. As shown in FIGS. 5 and 6, the blower 3 of the second embodiment is provided to be inclined with respect to the electronic component such that the battery unit 2 side of the rotation shaft is positioned lower than the motor 31 side. By this posture, the suction port 330 is provided to open obliquely downward toward the bottom wall side passage 223.

The blower 3 shown by a dashed-dotted line in FIG. 6 is provided in the height range of the battery case 21 in the height direction. That is, the upper end of the blower 3 installed in a posture inclined to the battery component is at a position lower than the upper end of the battery case 21, and the lower end is higher than the lower end of the battery case 21. Provided in

FIG. 6 is a view for explaining the positional relationship between the electronic component and the fan 30 of the blower 3 when the battery device 1 is viewed in the air blowing direction from the blowing portion 35. The fan 30 indicated by a two-dot chain line in FIG. 6 is installed so as to overlap the system main relay 4 and the battery control device 5 which are provided at positions facing the blowout portion 35 in their entirety. Further, the fan 30 may be configured so as to overlap the system main relay 4 provided at a position facing the blowout portion 35 in its entirety. In the system main relay 4, the fan 30 indicated by a two-dot chain line in FIG. 6 is installed so as to overlap a hatched portion AR1 of a broken line which is a range occupying between the battery side terminal 40 and the load side terminal 41.

When the battery device 1 is viewed in the air blowing direction from the blowing portion 35, the fan 30 is installed so as to overlap the center C 1 of the system main relay 4. When the battery device 1 is viewed in the air blowing direction from the blowing portion 35, the blower 3 is installed so as to overlap at least one of the corner portions of the system main relay.

According to the second embodiment, the fan 30, which is a turbo fan, is installed in an inclined posture with respect to the electronic component provided at the position facing the blowout unit 35. According to this configuration, the blowing air range of the fan 30 can be set to be long in the horizontal direction with respect to the battery component. As a result, the blowout air can be more broadly applied in the horizontal direction to the electronic component. It is possible to provide the blower 3 capable of effectively cooling the electronic component. Moreover, according to the air blower 3 installed in such a posture, the air blowing range can be enlarged, which also contributes to suppressing the fan diameter of the fan 30.

Furthermore, the bottom wall side passage 223 which is the downstream passage located most downstream in the battery case 21 is located below the suction portion of the blower 3. According to this configuration, the blower can be installed with the suction port 330 of the blower 3 directed toward the bottom wall side passage 223 side. Therefore, since the suction passage 320 for communicating the bottom wall side passage 223 and the suction port 330 can be set so as not to form an extremely bent portion, the ventilation resistance related to the suction of the blower 3 can be suppressed. . It is possible to provide the battery device 1 that achieves the air flow rate securing of the air blowing device 3 and the securing of the air blowing range.

Third Embodiment
A battery device 101 according to a third embodiment will be described with reference to FIG. In FIG. 7, the same components as those in the first embodiment are denoted by the same reference numerals and the same operations and effects can be obtained. The configurations, operations, and effects that are not particularly described in the third embodiment are the same as those in the first embodiment, and only differences from the first embodiment will be described below.

As shown in FIG. 7, the battery device 101 according to the third embodiment is different from the first embodiment in the positional relationship between the blower 3 having a turbofan and the electronic component, the pair of the blower 3 and the battery unit 2. Is different from the point that it has.

The blower 3 of the third embodiment is, as shown in FIG. 7, a downstream side of the air flow with respect to each of the blowout portions 35 that blow out air in the lateral direction among the blowout portions 35 provided around the fan 30. The system main relay 4 and the battery control device 5 are installed in the system. The system main relay 4 is provided downstream of the blowout air blown out from the blowout portion 35 to one side. The battery control device 5 is provided downstream of the blowout air blown out from the blowout portion 35 to the other side. Therefore, a blower 3 is provided between the system main relay 4 and the battery control device 5.

Fourth Embodiment
A battery device 201 according to a fourth embodiment will be described with reference to FIG. In FIG. 8, the same components as those in the first embodiment are denoted by the same reference numerals and the same operations and effects can be obtained. The configurations, operations, and effects that are not particularly described in the fourth embodiment are the same as those in the first embodiment, and only differences from the first embodiment will be described below.

As shown in FIG. 8, the battery device 201 of the fourth embodiment is different from the first embodiment in that the blower 6 has a scroll casing 62, the positional relationship between the blower 6 and the electronic components, and one set. The difference is that the air blower 6 and the battery unit 2 are provided.

In the blower device 6 of the fourth embodiment, the system main relay 4 is installed at the downstream side of the outlet port 630 among the plurality of outlet ports constituting the outlet portion provided in the scroll casing 62, and the outlet device 640 The battery control device 5 is installed at the downstream side. The system main relay 4 is provided downstream of the blowout air blown out from the blowout port 630 to one side. The battery control device 5 is provided downstream of the blowout air blown out from the blowout port 640 to the other side. Therefore, a blower 6 is provided between the system main relay 4 and the battery control device 5.

The blower 6 includes a motor 61, a sirocco fan 60 rotationally driven by the motor 61, and a scroll casing 62 incorporating the sirocco fan 60. The scroll casing 62 forms an air passage around the sirocco fan 60. A suction duct 32 is connected to a suction port 620 which constitutes a suction portion provided on the opposite side of the fixed portion of the motor 61 in the scroll casing 62. The suction passage in the suction duct 32 is in communication with the suction port 620 and is a passage extending toward the rotation shaft of the sirocco fan 60, and the air sucked by the sirocco fan 60 flows. Sirocco fan 60 is installed in a posture in which the rotation axis is parallel to top wall 210 and bottom wall 211 of battery case 21.

The scroll casing 62 forms an air circulation passage surrounding the sirocco fan 60. This passage is connected to the blowout passage inside each of

blowout duct portions

63 and 64 extending in the centrifugal direction of the sirocco fan 60 orthogonal to the rotation axis of the sirocco fan 60. Each of the blowout passages is a passage leading to a blowout port 630 which is an open end of the blowout duct portion 63 and a blowout port 640 which is an open end of the blowout duct portion 64.

The blower 6 in the battery device 201 communicates with the inside of the battery case 21 and sucks in air outside the battery case 21 via the inside of the battery case 21 and a plurality of outlets 630 which blow out the air. And a blowout unit including 640. The electronic components are provided downstream of the air blown out from the

outlets

630 and 640.

According to this configuration, the air taken into the interior from the outside of the battery case 21 by the suction force of the blower 6 cools the plurality of single cells 20 and is then drawn into the blower 6 and the plurality of

outlets

630, 640. Are blown out in different directions from. Air blown out from a plurality of locations in a plurality of directions other than one direction contacts the electronic component and cools the electronic component. Thus, the unit cell 20 can be cooled by the fresh air from the outside, and there is no need to provide an air passage for cooling the electronic component on the upstream side of the suction portion of the blower 6, so it is sucked into the blower 6. The ventilation resistance of the air can be suppressed. Since the air flow resistance can be suppressed, the air flow rate can be easily set large, so that the ability to cool both the battery and the electronic component can be enhanced. Furthermore, since the electronic components can be installed outside the battery case 21 and around the blower 6, it is possible to arrange electronic components utilizing dead space and empty space around the battery case 21. It can also contribute to the miniaturization of Therefore, according to the battery device 201, it is possible to achieve both the securing of the cooling performance of the battery and the electronic component and the downsizing of the device.

Electronic components are respectively provided downstream of the air blown out from each of the plurality of

outlets

630 and 640 of the blower 6. According to this configuration, it is possible to provide the battery device 201 capable of cooling the electronic component by utilizing the exhaust air blown out from all the

outlets

630 and 640.

Fifth Embodiment
A battery device 301 according to a fifth embodiment will be described with reference to FIG. In FIG. 9, the same components as those in the first embodiment and the fourth embodiment have the same reference numerals and the same functions and effects can be obtained. The configurations, operations, and effects not particularly described in the fifth embodiment are the same as those of the above-described embodiments, and only differences from the above-described embodiments will be described below.

As shown in FIG. 9, the battery device 301 of the fifth embodiment is different from the fourth embodiment in the positions of the

outlets

630 and 1640 in the scroll casing 162 of the blower 106 and the positions of the blower 106 and electronic components. The relationship is different. In the blower 106, the system main relay 4 is installed at the downstream side of the outlet 630 among the outlets constituting the outlet provided in the scroll casing 162, and the battery control is performed downstream of the outlet 1640. The apparatus 5 is installed. The system main relay 4 is provided downstream of the blowout air blown out to one side from the blowout port 630, and the battery control device 5 is provided downstream of the blowout air blown downward from the blowout port 1640. Therefore, system main relay 4 is located laterally with respect to blower 106, and battery control device 5 is located below with respect to blower 106.

The scroll casing 162 included in the blower 106 forms an air passage around the sirocco fan 60. The blowout passage provided in the scroll casing 62 is a passage extending to the blowout port 630 which is the open end of the blowout duct portion 63 and the blowout port 1640 which is the open end of the blowout duct portion 164.

Sixth Embodiment
A battery device 401 of the sixth embodiment will be described with reference to FIG. In FIG. 10, the same components as those in the first, fourth and fifth embodiments are denoted by the same reference numerals and the same functions and effects can be obtained. The configurations, operations, and effects not particularly described in the sixth embodiment are the same as those of the above-described embodiments, and only differences from the above-described embodiments will be described below.

As shown in FIG. 10, the battery device 401 of the sixth embodiment is different from that of the fifth embodiment in that the blower device 206 is configured of one motor 61 and two sirocco fans 60. . The air blower 206 includes one motor 61, two sirocco fans 60 rotationally driven by the motor 61, and two scroll casings 262 each incorporating the sirocco fan 60. The motor 61 has a rotating shaft supporting the sirocco fan 60 on both the upper and lower sides. Therefore, scroll casings 262 incorporating the sirocco fan 60 are provided on both sides of the motor 61. Each scroll casing 262 has a laterally extending outlet duct 263 that intersects the axis of rotation. In the blower 206, the two blowing ducts 263 extend in the same direction.

Each scroll casing 262 forms an air passage around the sirocco fan 60. The blowout passage provided in each scroll casing 262 is a passage leading to a blowout port 2630 which is an open end of the blowout duct portion 263. A suction duct 32 is connected to the suction port 620 of each scroll casing 262. The suction passage in each suction duct 32 is in communication with the passage in the battery case 21. In the blower 206, the system main relay 4 is installed at the downstream side of the outlet 2630 located at the upper side among the plurality of outlets configuring the outlet, and the downstream side than the outlet 2630 located at the lower side. The battery control device 5 is installed. The system main relay 4 and the battery control device 5 are stacked in the axial direction of the rotation shaft of the blower 206.

Therefore, each sirocco fan 60 takes in the air outside of each battery case 21, and sucks the air which has absorbed heat from the plurality of single cells 20 through the suction passage in each suction duct 32. Each sirocco fan 60 discharges the sucked air toward the system main relay 4 from the outlet 2630 located on the upper side, and discharges it toward the battery control device 5 from the outlet 2630 located on the lower side. After the released air comes into contact with the system main relay 4 and the battery control device 5, it is discharged to the outside of the vehicle.

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

The operation of the system main relay 4 described in the above embodiment may be configured to be controlled by another electronic control device other than the battery control device 5.

Although the battery device 1 described in the above embodiment includes two sets of the blower 3 and the battery unit 2, the battery device 1 achieving the purpose disclosed in the specification includes three or more sets of the blower 3. And the battery unit 2 may be included.

Claims

With multiple cells (20),
A battery case (21) for accommodating a plurality of the unit cells;
An air blower (3) provided outside the battery case to draw air outside the battery case into the inside to form an air flow for cooling a plurality of the unit cells;
Electronic components (4, 5) provided outside the battery case;
Equipped with
The air blower communicates with the inside of the battery case and sucks the air outside the battery case via the inside of the battery case (330), and a blow-off portion (air blows out air in different directions) 35) and
The said electronic component is a battery apparatus provided downstream of the airflow from the said blowing part.
The battery device according to claim 1, wherein the blower includes a turbo fan which blows out air radially outward of the fan.
The battery device according to claim 2, wherein the whole of the fan is installed so as to overlap in the air blowing direction with respect to the electronic component provided at a position facing the blowing portion.
The battery device according to claim 2, wherein the fan is installed in an inclined posture with respect to the electronic component provided at a position facing the blowout portion.
The battery device according to claim 4, wherein the downstream passage (223) located most downstream in the battery case is located below the suction portion.
The electronic component is provided at a portion (423) opposite to a battery side terminal (40) connected to the unit cell and a portion (422) where the battery side terminal is provided in the electronic component, And has a load side terminal (41) connected to the load;
The battery according to any one of claims 3 to 5, wherein the fan is installed so as to overlap a portion (AR1) which occupies between the battery side terminal and the load side terminal in the electronic component. apparatus.
The blower is one of at least two blowers (3A, 3B),
The battery device according to claim 2, wherein the electronic component is provided between the at least two blowers.
With multiple cells (20),
A battery case (21) for accommodating a plurality of the unit cells;
An air blower (6; 106; 206) which is provided outside the battery case and draws air outside the battery case into the inside to form an air flow for cooling the plurality of single cells;
Electronic components (4, 5) provided outside the battery case;
Equipped with
The blower is in communication with the inside of the battery case, and has a suction part (620) for sucking air outside the battery case via the inside of the battery case, and a plurality of outlets (630, And an outlet (63, 64; 63, 164; 263) including 640; 630, 1640;
The said electronic component is a battery apparatus provided downstream of the air which blows off from the said blowing outlet.
The battery device according to claim 8, wherein the electronic component is provided downstream of the air blown out from each of the plurality of outlets.
The battery device according to any one of claims 1 to 9, wherein the electronic component includes a relay device (4) which is a component capable of controlling current to a plurality of the unit cells.
The battery device according to claim 10, wherein the electronic component further includes a battery control device (5) that controls input and output with respect to a plurality of the single cells.