JP6879815B2 - In-vehicle battery - Google Patents

Description

The present invention relates to a technical field of an in-vehicle battery in which a battery module and a high-voltage device are arranged inside a storage case.

Japanese Unexamined Patent Publication No. 2014-221622

Various vehicles such as automobiles are equipped with in-vehicle batteries for supplying electric power to motors and various electrical components.

In recent years, in particular, vehicles such as EVs (Electric Vehicles) and HEVs (Hybrid Electric Vehicles) have become widespread, and in-vehicle batteries having a high power storage function in these electric-powered vehicles. Is installed.

Some in-vehicle batteries are provided with a battery module housed in a storage case and a high-voltage device (see, for example, Patent Document 1). The battery module is configured by arranging a plurality of battery cells (secondary batteries) such as a nickel hydrogen battery and a lithium ion battery, for example. As the high voltage device, for example, an inverter, a DC / DC converter, or the like is provided.

In such an in-vehicle battery, in order to maintain a high power storage function, a plurality of battery modules are arranged in a storage case, and each battery cell of the plurality of battery modules is connected in series or in parallel. is there.

In addition, some in-vehicle batteries have battery modules and high-voltage devices arranged in a luggage compartment formed at the rear of the vehicle and arranged inside a storage case, for example, in upper and lower stages. ..

The in-vehicle battery described in Patent Document 1 is partially inserted into an arrangement recess formed by opening upward in the floor panel, and is located between the rear side frames of the vehicle body provided apart from each other on the left and right. ..

In the case of the above-mentioned in-vehicle battery, if heat is generated in the high-voltage device or battery module and the temperature rises, the proper driving state of these high-voltage devices or battery module may be hindered. It is necessary to cool the voltage equipment and battery module to suppress the temperature rise.

By the way, in an in-vehicle battery, a cover body is attached to a storage case in which a battery module and a high-voltage device are housed, and the battery module and the high-voltage device are covered by the cover body, so that the temperature inside the in-vehicle battery rises. In some cases, the battery module and the high-voltage device are cooled by taking in air as cooling air from the vehicle interior, which is the outside of the vehicle-mounted battery, through a duct.

However, in order to cool both the battery module and the high-voltage equipment, it is necessary to take in a lot of cooling air from the passenger compartment, and the opening area of the duct for taking in the cooling air from the passenger compartment becomes larger, and the duct becomes larger accordingly. Will become large, and it will be difficult to secure the arrangement and required cross-sectional area, and there is a risk that the size of the in-vehicle battery will increase.

Therefore, an object of the present invention is to overcome the above-mentioned problems and to reduce the size of the cooling duct and the vehicle-mounted battery while ensuring good cooling performance for the battery module and the high-voltage device.

First, the vehicle-mounted battery according to the present invention is a vehicle-mounted battery in which an internal space is formed as a storage space and at least a battery module and a high-voltage device are stored in the storage space. A first cooling duct that takes in the air outside the storage case as cooling air and sends it to the battery module, and at least the air inside the storage case is taken in as cooling air and sent to the high-voltage device. A second cooling duct is provided , and a partition plate for partitioning the storage space up and down is arranged inside the storage case, the high voltage device is attached to the upper surface of the partition plate, and the battery module is the partition plate. A battery intake duct is arranged below the partition plate, which is connected to the first cooling duct and allows cooling air taken in from the first cooling duct to flow toward the battery module. The battery intake duct is formed so as to be opened at least upward, and the battery intake duct is attached to the lower surface of the partition plate .

As a result, the air outside the storage case is taken in as cooling air to cool the battery module, and at least the air inside the storage case is taken in as cooling air to cool the high-voltage device.
Further, the space inside the intake duct for the battery is blocked from above by the partition plate.

Secondly, in the vehicle-mounted battery according to the present invention described above, it is desirable that the air inside the storage case and the air outside the storage case are taken in as cooling air by the second cooling duct.

As a result, the high-voltage equipment is cooled by both the air inside the storage case and the air outside the storage case.

Third, in the vehicle battery according to the present invention described above, attached to the partition plate have a locating hole, the partition plate in a state in which a part the high voltage equipment is projected downward from the arrangement hole is, it is desirable to pre-Symbol second cooling duct is attached in a state of covering the arrangement hole from below to the lower surface of the partition plate.

As a result, the high voltage device is attached to the upper surface of the partition plate, and the second cooling duct is attached to the lower surface of the partition plate.

Fourth, in the vehicle-mounted battery according to the present invention described above, the second cooling duct is formed in a shape that is opened at least upward, and the second cooling duct is attached to the lower surface of the partition plate. It is desirable to be.

As a result, the space inside the second cooling duct is closed from above by the partition plate.

Fifth , in the vehicle-mounted battery according to the present invention described above, a plurality of the battery modules are provided, and a plurality of intake holes communicating with each other in the space inside the plurality of battery modules are formed in the battery intake duct. It is desirable to be done.

As a result, the cooling air flowing through the battery intake duct is communicated with the space inside the plurality of battery modules.

According to the present invention, the air outside the storage case is taken in as cooling air to cool the battery module, and at least the air inside the storage case is taken in as cooling air to cool the high-voltage device. It is possible to reduce the size of the cooling duct and the in-vehicle battery while ensuring good cooling performance for the module and high-voltage equipment.

2 to 8 show an embodiment of the vehicle-mounted battery of the present invention, and this figure is a cross-sectional view of the vehicle-mounted battery. It is an exploded perspective view of an in-vehicle battery. It is a perspective view of the vehicle-mounted battery shown in the state where the cover body is removed. It is a top view of the vehicle-mounted battery shown in the state where the cover body is removed. It is an enlarged side view which shows the state which the electric wire is inserted into the electric wire insertion hole. It is a perspective view which shows a part structure arranged inside a storage case. It is a top view which shows each part about the path of cooling air. It is a perspective view which shows each part about the path of cooling air.

Hereinafter, embodiments for carrying out the vehicle-mounted battery of the present invention will be described with reference to the accompanying drawings.

The vehicle-mounted battery 1 has a holding frame 2, a storage case 3, a cover body 4, and battery modules 5 and 5 (see FIGS. 1 to 4).

The vehicle-mounted battery 1 is arranged, for example, in a state where a part of the vehicle-mounted battery 1 is inserted into an arrangement recess 100a formed in a floor panel 100 of a luggage compartment located behind a rear seat of a vehicle (see FIG. 1).

The holding frame 2 is formed by connecting a first portion 2a and 2a extending left and right and separated from each other in the front-rear direction and a second portion 2b and 2b extending left and right and located apart from each other in a grid shape. (See FIGS. 1 to 4). The left and right ends of the first portions 2a and 2a are in a state of protruding laterally (outwardly) from the second portions 2b and 2b, respectively.

In the vehicle-mounted battery 1, the left and right ends of the first portions 2a and 2a of the holding frame 2 are fixed to the floor panel 100 by bolts or the like.

A flat plate-shaped partition plate 6 is arranged inside the storage case 3. The space inside the storage case 3 is divided into an upper storage space 3a and a lower storage space 3b by a partition plate 6.

The partition plate 6 is formed with a first arrangement hole 6a and a second arrangement hole 6b separated from each other on the left and right. A communication hole 6c is formed in the partition plate 6 in front of the first arrangement hole 6a. A discharge hole 6d is formed in the partition plate 6 on the right side of the second arrangement hole 6b.

A terminal block 7 is attached to the partition plate 6. One end of the electric wires 8, 8, ... Is connected to the terminal block 7, and the electric wires 8, 8, ... Are led out from the in-vehicle battery 1 and the other end is connected to a control circuit, a power supply circuit, etc. (not shown). It is connected.

The storage case 3 has a bottom surface portion 9 facing in the vertical direction and a peripheral surface portion 10 whose lower edge is continuous with the outer peripheral edge of the bottom surface portion 9. The upper end of the peripheral surface portion 10 of the storage case 3 is fixed to the holding frame 2. A connecting hole 10a is formed at the right end portion of the rear surface portion of the peripheral surface portion 10. The peripheral surface portion 10 is provided with an annular plate mounting protrusion 10b protruding inward.

The outer peripheral portion of the partition plate 6 is placed on the plate mounting protrusion 10b and attached to the storage case 3.

The cover body 4 is formed in a shallow box shape that is opened downward, and has an upper surface portion 11 and a peripheral portion 12 whose upper edge is continuous with the outer peripheral edge of the upper surface portion 11. An electric wire insertion hole 13a is formed in the front surface portion 13 of the peripheral portion 12 at a position closer to the left side surface portion 14, and a duct insertion hole 14a is formed in the left side surface portion 14 of the peripheral portion 12.

The cover body 4 is placed on the upper surface of the storage case 3 and attached to the storage case 3. With the cover body 4 attached to the storage case 3, the electric wires 8, 8, ... Are inserted into the electric wire insertion holes 13a (see FIG. 5). A gap 200 is formed around the electric wires 8, 8, ... In the electric wire insertion hole 13a, and external air is taken into the inside of the storage case 3 from the gap 200.

In the lower storage space 3b of the storage case 3, for example, two battery modules 5 and 5 are stored separated from each other on the left and right (see FIGS. 1 to 4). The battery modules 5 and 5 are fixed to the bottom surface portion 9.

The battery module 5 has a box-shaped cell cover 15 having a longitudinal direction in the front-rear direction, and a plurality of battery cells 16, 16, ... Arranged side by side inside the cell cover 15 (FIG. 6). 2). The cell cover 15 is provided with an inflow portion 15a and an outflow portion 15b separated from each other in the front-rear direction.

In the lower storage space 3b of the storage case 3, a battery control unit and a junction box (not shown) are stored on opposite sides in the left-right direction with the battery modules 5 and 5 interposed therebetween. The battery control unit has a function of controlling the entire vehicle-mounted battery 1. The junction box has a relay, a fuse, a connector terminal, and the like.

In the upper storage space 3a of the storage case 3, the first high-voltage device 17 is arranged on the right side of the terminal block 7 in the first half, and the second high-voltage devices 18 and 19 are separated from each other to the left and right in the second half. They are arranged (see FIGS. 1 to 4). The first high-voltage device 17 is, for example, an inverter for a pump of an electric oil pump, the second high-voltage device 18 is, for example, a DC / DC converter, and the second high-voltage device 19 is, for example, a DC / DC converter. It is an inverter for traction motors.

The first high voltage device 17 is attached to the upper surface of the partition plate 6. The first high-voltage device 17 is provided with radiating fins 17a, 17a, ... Protruding upward on the upper surface side. The first high-voltage device 17 is arranged between the electric wire insertion hole 13a formed in the cover body 4 and the discharge hole 6d formed in the partition plate 6 in a state where the cover body 4 is attached to the storage case 3. ing.

The second high-voltage device 18 and the second high-voltage device 19 are provided with heat-dissipating fins 18a, 18a, ... And heat-dissipating fins 19a, 19a, ... Protruding downward, respectively. As shown in FIG. 1, the second high-voltage device 18 is attached to the upper surface of the partition plate 6 with the heat radiation fins 18a, 18a, ... Inserted into the first arrangement hole 6a from above. The high-voltage device 19 of 2 is attached to the upper surface of the partition plate 6 with the heat radiation fins 19a, 19a, ... Inserted into the second arrangement hole 6b from above.

Battery modules 5, 5, battery control unit, junction box, terminal block 7, first high-voltage device 17, second high-voltage device 18, and second high-voltage device 19 are arranged inside the storage case 3. All the electrical components required for driving the vehicle-mounted battery 1 are arranged inside the storage case 3 in a state of being covered with the cover body 4.

Therefore, electromagnetic noise from the outside can be shielded from the electrical components required for driving the vehicle-mounted battery 1, and a good driving state of the vehicle-mounted battery 1 can be ensured by strengthening the electromagnetic shield.

The vehicle-mounted battery 1 is provided with a first cooling duct 20 (see FIGS. 1 to 4). The first cooling duct 20 is attached to the storage case 3 with the duct insertion hole 14a of the cover body 4 inserted. One end of the first cooling duct 20 is provided as an inlet portion 20a, and the other end is provided as an outlet portion 20b.

In the first cooling duct 20, the inlet portion 20a is inserted into the duct insertion hole 14a of the cover body 4, and the outlet portion 20b is inserted into the communication hole 6c of the partition plate 6.

A second cooling duct 21 is arranged in the lower storage space 3b of the storage case 3. The second cooling duct 21 has a flow portion 22 formed in a horizontally long flat shape having a thin upper and lower thickness, and a coupling protrusion 23 protruding downward from the lower surface portion at the right end portion of the flow portion 22. There is. The flow portion 22 is formed in the shape of a shallow box opened upward and to the left, the upper opening is formed as an inflow opening 22a, and the left opening is formed as an intake opening 22b. The internal space of the second cooling duct 21 is formed as an exhaust heat space 21a for discharging the heat of the second high voltage devices 18 and 19.

The second cooling duct 21 is attached with the flow portion 22 in contact with the lower surface of the partition plate 6, and the first arrangement hole 6a, the second arrangement hole 6b, and the discharge hole 6d cover the flow portion 22 from below. It is said. The entire second cooling duct 21 is located in the lower storage space 3b of the storage case 3.

As described above, since the second cooling duct 21 is formed in a shape that is opened at least upward and is attached to the lower surface of the partition plate 6, the space inside the second cooling duct 21 is a partition plate. It is blocked from above by No. 6, the upper surface of the second cooling duct 21 is unnecessary, and the thickness of the second cooling duct 21 is reduced, so that the vehicle-mounted battery 1 can be made smaller and lighter by that amount. Can be done.

The first arrangement hole 6a, the second arrangement hole 6b, and the discharge hole 6d of the partition plate 6 communicate with each other in the exhaust heat space 21a of the second cooling duct 21 (see FIGS. 1 and 6). In the second cooling duct 21, the heat radiation fins 18a, 18a, ... And the second high voltage of the second high voltage device 18 inserted into the first arrangement hole 6a and the second arrangement hole 6b, respectively. The heat radiation fins 19a, 19a, ... Of the device 19 are inserted from above, respectively, and the heat radiation fins 18a, 18a, ... And the heat radiation fins 19a, 19a, ... Are the exhaust heat spaces of the second cooling duct 21. It is located at 21a.

A battery exhaust duct 24 is coupled to the coupling protrusion 23 of the second cooling duct 21 (see FIGS. 2 and 6). The battery exhaust duct 24 is formed in a horizontally long shape, and has an exhaust hole 24a on the rear surface portion at the right end portion. Connecting holes 24b, 24b are formed on the front surface of the battery exhaust duct 24 so as to be separated from each other on the left and right. A coupling portion 24c opened upward is provided at the right end portion of the battery exhaust duct 24.

In the battery exhaust duct 24, the coupling portion 24c is coupled to the coupling protrusion 23 of the second cooling duct 21 from below. The battery exhaust duct 24 is connected to the battery modules 5 and 5 by inserting the outflow portions 15b and 15b of the cell covers 15 and 15 into the connecting holes 24b and 24b, respectively.

A battery intake duct 25 is attached to the lower surface of the partition plate 6 on the front side of the second cooling duct 21. The battery intake duct 25 has a horizontally long shape with thin top and bottom thickness, and is formed in a shallow box shape opened upward. Intake holes 25a and 25a are formed on the lower surface of the battery intake duct 25 so as to be separated from each other on the left and right.

The battery intake duct 25 is attached in contact with the lower surface of the partition plate 6, and the communication hole 6c is covered with the battery intake duct 25 from below (see FIGS. 6 to 8). The battery intake duct 25 is connected to the battery modules 5 and 5 by inserting inflow portions 15a and 15a provided in the cell covers 15 and 15 into the intake holes 25a and 25a, respectively.

As described above, since the battery intake duct 25 is formed in a shape that is opened at least upward and is attached to the lower surface of the partition plate 6, the space inside the battery intake duct 25 is opened from above by the partition plate 6. It is closed, the upper surface of the battery intake duct 25 is unnecessary, and the thickness of the battery intake duct 25 is reduced, so that the size and weight of the vehicle-mounted battery 1 can be reduced accordingly.

A cooling fan 26 is connected to the battery exhaust duct 24 (see FIGS. 2 and 6). The cooling fan 26 is, for example, a discharge fan that discharges the taken-in air to the outside. The cooling fan 26 has a connecting protrusion 26a protruding forward, and the connecting protrusion 26a is inserted into the connecting hole 10a formed in the peripheral surface portion 10 of the storage case 3 and inserted into the connecting hole 24b. Is connected to the battery exhaust duct 24.

As described above, the battery modules 5, 5 and the second high-voltage devices 18 and 19 are arranged inside the storage case 3, but the battery modules 5, 5 are, for example, 50 when they are driven such as charging and discharging. The temperature is raised to about 100 degrees, and the second high-voltage devices 18 and 19 are raised to a temperature of, for example, about 100 degrees when driven. Further, the temperature inside the storage case 2 is raised to, for example, about 50 degrees, and the temperature of the vehicle interior outside the storage case 2 is generally set to a temperature lower than 50 degrees.

In the vehicle-mounted battery 1 configured as described above, when the cooling fan 26 is rotated, the air in the vehicle interior, which is the air outside the storage case 3, becomes the cooling air at the inlet portion 20a of the first cooling duct 20. Cooling air is sent from the outlet portion 20b toward the battery intake duct 25.

The cooling air sent toward the battery intake duct 25 is flowed from the intake holes 25a and 25a of the battery intake duct 25 inside the cell covers 15 and 15 of the battery modules 5 and 5, respectively, and the battery cells 16 and 16 ... Is sprayed on the battery cells 16, 16, ..., And the temperature rise of the battery modules 5, 5 is suppressed. Therefore, the temperature rise of the battery modules 5 and 5 is suppressed by forced cooling by the cooling air generated by the rotation of the cooling fan 26.

At this time, as described above, the battery modules 5 and 5 are raised to a temperature of about 50 degrees during driving such as charging and discharging, but the temperature of the passenger compartment outside the storage case 2 is set to a temperature lower than 50 degrees. Therefore, good cooling performance for the battery modules 5 and 5 is ensured by the air in the vehicle interior.

The cooling air that has flowed inside the cell covers 15 and 15 is flowed from the connecting holes 24b and 24b toward the inside of the battery exhaust duct 24, and is passed through the exhaust hole 24a of the battery exhaust duct 24 by the cooling fan 26. It is discharged to the outside of the vehicle-mounted battery 1.

On the other hand, when the cooling fan 26 is rotated, the air inside the storage case 3 is taken in as cooling air from the intake opening 22b of the second cooling duct 21, and the first arrangement holes 6a and the second of the partition plate 6 are taken in. The exhaust heat space 21a is sent from the arrangement holes 6b to the heat radiation fins 18a, 18a, ..., 19a, 19a, ... Of the second high-voltage devices 18, 19 inserted into the flow unit 22, respectively. Be flowed.

The cooling air flowing through the exhaust heat space 21a is blown onto the heat radiation fins 18a, 18a, ..., 19a, 19a, ... Of the second high voltage devices 18, 19 to the second high voltage device 18, 19 is cooled and the temperature rise of the second high voltage devices 18 and 19 is suppressed. Therefore, the temperature rise of the second high-voltage devices 18 and 19 is suppressed by the forced cooling by the cooling air generated by the rotation of the cooling fan 26 as in the battery modules 5 and 5.

At this time, as described above, the second high-voltage devices 18 and 19 are raised to a temperature of about 100 degrees when driven, but the air inside the storage case 2 is set to a temperature of up to about 50 degrees. , The air inside the storage case 2 ensures good cooling performance for the second high voltage devices 18 and 19.

The cooling air flowing through the exhaust heat space 21a of the second cooling duct 21 is discharged to the outside of the vehicle-mounted battery 1 by the cooling fan 26 through the exhaust hole 24a of the battery exhaust duct 24.

Further, external air is taken into the upper storage space 3a of the storage case 3 from the gap 200 of the electric wire insertion hole 13a formed in the cover body 4. At this time, an air flow from the upper storage space 3a to the exhaust heat space 21a side is generated by the cooling fan 26 in the discharge hole 6d of the partition plate 6 communicated with the exhaust heat space 21a of the first flow duct 21. There is.

Therefore, the air taken in from the gap 200 of the electric wire insertion hole 13a is drawn into the discharge hole 6d through the periphery of the first high voltage device 17, and the exhaust heat space 21a of the second cooling duct 21 from the discharge hole 6d. And, it is discharged to the outside of the vehicle-mounted battery 1 by the cooling fan 26 through the exhaust hole 24a of the battery exhaust duct 24.

As described above, the air taken in from the gap 200 of the electric wire insertion hole 13a is drawn into the discharge hole 6d through the periphery of the first high-voltage device 17, so that the air cools the first high-voltage device 17. Then, the temperature rise of the first high voltage device 17 is suppressed.

As described above, in the vehicle-mounted battery 1, the first cooling duct 20 that takes in the air outside the storage case 3 as cooling air and sends it to the battery modules 5 and 5 and the storage case 3 A second cooling duct 21 that takes in the internal air as cooling air and sends it to the second high-voltage devices 18 and 19 is provided.

Therefore, the air outside the storage case 3 is taken in as cooling air to cool the battery modules 5 and 5, and the air inside the storage case 3 is taken in as cooling air to make the second high voltage devices 18 and 19 cool. Since it is cooled, it is possible to reduce the size of the first cooling duct 20 and the vehicle-mounted battery 1 while ensuring good cooling performance for the battery modules 5, 5 and the second high-voltage devices 18 and 19. ..

In addition to the first cooling duct 20 and the second cooling duct, for example, cooling air taken in from the outside or the inside of the vehicle is sent to the vehicle-mounted battery 1 toward the first cooling duct 20 and the like. Other cooling ducts are provided, and by downsizing the first cooling duct 20, these other cooling ducts can also be downsized.

Further, since the first cooling duct 20 functions as a dedicated duct for cooling the battery modules 5 and 5, the amount of cooling air required for cooling the battery modules 5 and 5 is supplied by the first cooling duct 20. It suffices to take in, and it is not necessary to take in the cooling air in consideration of the cooling of the second high voltage devices 18 and 19 by the first cooling duct 20, and the first cooling duct 20 is reduced in size by that amount. The arrangement space of the in-vehicle battery 1 of the cooling duct 20 of 1 is reduced, and the in-vehicle battery 1 can be miniaturized.

Further, since the amount of air taken into the vehicle interior by the first cooling duct 20 is small, it becomes difficult to reduce the effect of heating and cooling the vehicle interior, and it occurs when the cooling air of the first cooling duct 20 is taken in. The suction noise is reduced and good quietness in the passenger compartment can be ensured.

Furthermore, since the first cooling duct 20 is miniaturized and the cross-sectional area of the first cooling duct 20 is reduced, the switch sound and radio noise of the inverter generated inside the vehicle-mounted battery 1 are first. It is difficult to transmit to the vehicle interior through the cooling duct 20, and high quietness of the vehicle interior can be ensured.

In the above, an example is shown in which the cooling of the second high voltage devices 18 and 19 is performed only by the air inside the storage case 3 taken in by the second cooling duct 21, but the second high voltage. The cooling of the devices 18 and 19 may be performed by both the air inside the storage case 3 and the air outside the storage case 3.

As a configuration in which the cooling of the second high-voltage devices 18 and 19 is performed by both the air inside the storage case 3 and the air outside the storage case 3, for example, one of the second cooling ducts 21. A configuration in which a part of the outside air of the storage case 3 which is communicated with the first cooling duct 20 and taken in by the first cooling duct 20 is flowed to the second cooling duct 21 or a second A part of the cooling duct 21 is provided with a take-in portion for taking in the air outside the storage case 3.

In this way, the air inside the storage case 3 and the air outside the storage case 3 are taken in as cooling air by the second cooling duct 21, so that the air inside the storage case 3 and the air outside the storage case 3 are taken in. Since the second high-voltage devices 18 and 19 are cooled by both of the air, the temperature of the cooling air tends to be low, and the cooling efficiency of the second high-voltage devices 18 and 19 can be improved.

Further, in the vehicle-mounted battery 1, a partition plate 6 for vertically partitioning the space inside the storage case 3 is arranged, and in the second high-voltage devices 18 and 19, a part of the first arrangement of the partition plate 6 is arranged. The battery modules 5 and 5 are arranged below the partition plate 6, and the second cooling duct 21 is attached to the partition plate 6 so as to project downward from the holes 6a and the second arrangement hole 6b. A first arrangement hole 6a and a second arrangement hole 6b are attached to the lower surface of the sixth so as to cover the first arrangement hole 6a and the second arrangement hole 6b from below.

Therefore, since the second high-voltage devices 18 and 19 are attached to the upper surface of the partition plate 6 and the second cooling duct 21 is attached to the lower surface of the partition plate 6, the arrangement space is effectively utilized. The second high voltage devices 18 and 19 can be cooled by a simple configuration.

Further, since the battery intake duct 25 is formed with a plurality of intake holes 25a and 25a communicating with each other in the internal spaces of the plurality of battery modules 5 and 5, a plurality of cooling air flowing through the battery intake duct 25 is formed. It is possible to simplify the number of parts and the structure without requiring a plurality of ducts that are communicated with the internal space of the battery modules 5 and 5 and send cooling air to each of the plurality of battery modules 5 and 5.

Furthermore, a cover body 4 that covers at least the first high-voltage device 17, the second high-voltage devices 18, 19 and the battery modules 5 and 5 is attached to the storage case 3, and the electric wires 8 and 8 are attached to the cover body 4. An electric wire insertion hole 13a through which the ... Is inserted is formed, and external air is taken in from the electric wire insertion hole 13a as cooling air for cooling the first high-voltage device 17.

Therefore, since the first high-voltage device 17 is cooled by the air taken in from the electric wire insertion hole 13a, a dedicated flow path for the cooling air for cooling the first high-voltage device 17 is not required, and the structure of the structure is not required. It is possible to suppress the temperature rise of the first high-voltage device 17 after simplifying the process.

In addition, since the first high-voltage device 17 is arranged between the electric wire insertion hole 13a of the cover body 4 and the discharge hole 6d of the partition plate 6, it is taken in from the electric wire insertion hole 13a and discharged from the discharge hole 6d. The first high-voltage device 17 exists in the path of the cooling air, and the cooling efficiency of the first high-voltage device 17 can be improved.

In the above description, an example is shown in which the cooling air taken in from the first cooling duct 20 and the second cooling duct 21 is flowed toward the cooling fan 26 by the rotation of the cooling fan 26. The fan may be a fan that sends cooling air toward the first cooling duct 20 and the second cooling duct 21, or a cooling fan may be provided on the first cooling duct 20 side or the second cooling duct 21 side. As a result, contrary to the above, it is possible to configure the structure in which the cooling air is discharged from the first cooling duct 20 and the second cooling duct 21.

In this case, cooling air is flowed from the discharge hole 6d of the partition plate 6 to the gap 200 of the electric wire insertion hole 13a of the cover body 4 through the upper storage space 3a of the storage case 3, and the first high voltage device. 17 is cooled and the temperature rise of the first high voltage device 17 is suppressed.

Further, although the example in which the second high voltage devices 18 and 19 are cooled by the cooling air taken in by the second cooling duct 21 is shown above, it is taken in by the second cooling duct 21. Both the first high-voltage device 17 and the second high-voltage devices 18 and 19 may be cooled by the cooling air, and the first high voltage may be cooled by the cooling air taken in by the second cooling duct 21. The device 17 may be configured to be cooled.

1 ... In-vehicle battery, 3 ... Storage case, 5 ... Battery module, 6 ... Partition plate, 6a ... First arrangement hole, 6b ... Second arrangement hole, 17 ... First high voltage device, 18 ... Second High-voltage equipment, 19 ... 2nd high-voltage equipment, 20 ... 1st cooling duct, 21 ... 2nd cooling duct, 25 ... Battery intake duct, 25a ... Intake hole

Claims (5)

An in-vehicle battery having a storage case in which an internal space is formed as a storage space, and at least a battery module and a high-voltage device are stored in the storage space.
A first cooling duct that takes in air outside the storage case as cooling air and sends it to the battery module.
It is provided with at least a second cooling duct that takes in the air inside the storage case as cooling air and sends it to the high voltage device .
A partition plate that divides the storage space into upper and lower parts is arranged inside the storage case.
The high voltage device is mounted on the upper surface of the partition plate and
The battery module is located below the divider and
Below the partition plate, a battery intake duct connected to the first cooling duct and allowing cooling air taken in from the first cooling duct to flow toward the battery module is arranged.
The battery intake duct is formed so as to be open at least upward.
An in-vehicle battery in which the intake duct for the battery is attached to the lower surface of the partition plate. The vehicle-mounted battery according to claim 1, wherein the air inside the storage case and the air outside the storage case are taken in as cooling air by the second cooling duct. The partition plate have a locating hole,
The high-voltage device is attached to the partition plate with a part protruding downward from the arrangement hole.
Before SL-vehicle battery according to claim 1 or claim 2 mounted in a state that the second cooling duct covering the arrangement hole on the lower surface of the partition plate from below. The second cooling duct is formed in a shape that is opened at least upward.
The vehicle-mounted battery according to claim 3, wherein the second cooling duct is attached to the lower surface of the partition plate. A plurality of the battery modules are provided,
The vehicle-mounted battery according to any one of claims 1 to 4 , wherein a plurality of intake holes communicating with each other in the internal space of the plurality of battery modules are formed in the battery intake duct.

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