Battery unit

Abstract

To provide a battery unit which enables downsizing.SOLUTION: A battery unit 1 includes a power source module 10 capable of converting a voltage value of an output voltage of a battery 4 where power supplied to a motor for travel of a vehicle is stored, into a predetermined voltage value, a pump module 20 having a pump 21 for circulating cooling fluid to the battery 4 and the power source module 10, and a housing 30 for storing the power source module 10 and the pump module 20 together with the battery 4, wherein in the housing 30, the pump module 20 and the power source module 10 are arranged on a front side F in a travel direction of the vehicle rather than the battery 4.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a battery unit mounted on a vehicle.

Background Art

[0002] In recent years, automobiles equipped with a motor (corresponding to a "travel motor") as a driving power source, such as hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), battery electric vehicles (BEVs), and fuel cell electric vehicles (FCEVs), have become popular. These automobiles (hereinafter collectively referred to as "electric vehicles") are equipped with a battery for driving the motor. As technologies related to the batteries mounted on such electric vehicles, there are, for example, those described in Patent Documents 1 and 2 cited below.

[0003] Patent Document 1 describes a battery cooling structure for a vehicle. This battery cooling structure includes a battery module, a cooling passage for supplying a cooling fluid to the battery module, an electrical device electrically connected to the battery module, a cooler for cooling the cooling fluid, and a battery case for housing the battery module, the electrical device, the cooler, and the cooling passage. The cooling fluid after cooling the battery cells of the battery module is supplied to the electrical device to cool the electrical device.

[0004] Patent Document 2 describes a vehicle battery pack. This vehicle battery pack has a plurality of battery modules, and a cooling device capable of cooling the plurality of battery modules is provided. The cooling device has a pump capable of discharging a refrigerant. In the battery pack, electrical devices are arranged side by side with the pump.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] As an issue for further popularizing electric vehicles, increasing the cruising range can be mentioned. To increase the cruising range, for example, increasing the number of mounted batteries can be considered. However, since the vehicle body of an electric vehicle has limited mounting space, it is not possible to easily increase the number of mounted batteries. Therefore, miniaturization of the battery and the devices provided around the battery is desired. In the battery cooling structure described in Patent Document 1, an electric device and a cooler are provided in a battery case, but they are provided separately from each other. Also, in the vehicle battery pack described in Patent Document 2, a pump and an electric device are provided separately. For this reason, the inventions described in Patent Documents 1 and 2 have room for improvement in terms of miniaturization.

[0007] Therefore, a battery unit that can be miniaturized is required.

Means for Solving the Problems

[0008] The characteristic configuration of the battery unit according to the present invention includes a power supply module capable of converting the voltage value of the output voltage of a battery in which power supplied to a traveling motor of a vehicle is stored into a voltage of a predetermined voltage value, a pump module having a pump for circulating a cooling fluid across the battery and the power supply module, and a housing for housing the power supply module and the pump module together with the battery. In the housing, the pump module and the power supply module are arranged on the front side in the traveling direction of the vehicle with respect to the battery.

[0009] With such a characteristic configuration, since the power module and the pump module are housed in the housing together with the battery, the battery unit can be miniaturized. Further, by housing the power module and the pump module together with the battery in the housing, the length of the harness for electrically connecting each of the power module, the pump module, and the battery can be shortened. Also, since the pump module and the power module are arranged on the front side of the battery, the length of the piping for connection to devices such as an air conditioning unit and a radiator that must be arranged on the front side of the vehicle can be shortened. Therefore, it is possible to reduce the power loss and the piping length in the harness, and further suppress the cost increase of the battery unit and achieve miniaturization.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0011] The battery unit according to the present invention is configured to be small. Hereinafter, the battery unit 1 of the present embodiment will be described. However, the battery unit 1 is not limited to the following embodiments, and various modifications are possible without departing from the gist thereof.

[0012] FIG. 1 shows a vehicle 2 on which the battery unit 1 is mounted. In FIG. 1, the front side in the traveling direction of the vehicle 2 is indicated by "F", and the rear side in the traveling direction of the vehicle 2 is indicated by "B".

[0013] The battery unit 1 is provided at the bottom 2A of the vehicle 2 and includes a power supply module 10, a pump module 20, and a housing 30. The power supply module 10 and the pump module 20 are housed in the housing 30 together with a high-voltage battery 4 (an example of a "battery") that stores electric power used for the running of the vehicle 2. By housing the high-voltage battery 4 in the housing 30, it becomes possible to prevent damage caused by small stones or the like that bounce up from the road surface 200 during the running of the vehicle 2. The housing 30 is formed in a bottomed box shape using, for example, resin, and a storage space 30A is formed. The high-voltage battery 4, the power supply module 10, and the pump module 20 are housed in this storage space 30A. The housing 30 is provided between a pair of front wheels FW and a pair of rear wheels RW on the bottom 2A facing the road surface 200 while the vehicle 2 is running.

[0014] The high-voltage battery 4 stores electric power supplied to the driving motor M of the vehicle 2. In the present embodiment, the rotational force of the driving motor M is transmitted to a pair of front wheels FW. In the present embodiment, although the rotational force of the driving motor M is transmitted to a pair of front wheels FW, it may be configured such that the rotational force of the driving motor M is transmitted to a pair of rear wheels RW, or it may be configured such that the rotational force of the driving motor M is transmitted to a pair of front wheels FW and a pair of rear wheels RW.

[0015] The passenger compartment 3 is partitioned by a partition wall 6 from a motor room 7 in which the driving motor M is housed. An air-conditioning unit 8 for air-conditioning the passenger compartment 3 is provided in the motor room 7, and it is configured to be introduced into the passenger compartment 3 through a duct 9 through which the air-conditioning air flow by the air-conditioning unit 8 is discharged. In addition to the duct 9, the vehicle 2 is also provided with other ducts (not shown) so that the air flow from the air-conditioning unit 8 can be introduced to the front, foot area, and windshield of the driver.

[0016] Also, a low-voltage battery 5 that stores electric power supplied to the electrical equipment mounted on the vehicle 2 is provided in the motor room 7. The low-voltage battery 5 outputs a voltage having a voltage value smaller than the voltage value of the output voltage of the high-voltage battery 4.

[0017] FIG. 2 is a perspective view of the battery unit 1. As shown in FIG. 2, the battery unit 1 is configured by housing a high-voltage battery 4 in a housing 30. As described above, the housing 30 houses the power module 10, the pump module 20, and the high-voltage battery 4 together, and further, a cooling plate 40 is housed in the housing 30 in a state of being in contact with the heat transfer sheet (not shown). Therefore, the high-voltage battery 4, the power module 10, the pump module 20, and the cooling plate 40 are housed in a single housing 30. In FIG. 1, the illustration of the cooling plate 40 is omitted.

[0018] In the present embodiment, inside the housing 30, the high-voltage battery 4 is disposed on the rear side B in the traveling direction of the vehicle 2, and the power module 10 and the pump module 20 are disposed on the front side F in the traveling direction of the vehicle 2 with respect to the high-voltage battery 4. Further, the power module 10 is disposed on the left side L in the traveling direction of the vehicle 2 in the housing 30, and the pump module 20 is disposed on the right side R in the traveling direction of the vehicle 2 with respect to the power module 10.

[0019] The cooling plate 40 has an internal circulation path for circulating a cooling fluid across the high-voltage battery 4 and the power module 10 by a pump 21. The cooling plate 40 is provided with a hollow flow path inside, and this flow path corresponds to the circulation path. Therefore, the circulation path is also housed in a single housing 30. As the cooling fluid, it is possible to use cooling water such as long-life coolant (LLC), insulating oil such as paraffin-based, or a refrigerant such as hydrofluorocarbon (HFC) or hydrofluoroolefin (HFO).

[0020] As shown in FIG. 2, both the power module 10 and the high-voltage battery 4 are housed in the housing 30 in a state where the cooling plate 40 is in contact with them via a heat transfer sheet (not shown). Thereby, it becomes possible to adjust the temperature of the electronic components constituting the power module 10 and the high-voltage battery 4 through the cooling fluid flowing through the cooling plate 40.

[0021] The pump module 20 has a pump 21 that circulates a cooling fluid across the high-voltage battery 4 and the power supply module 10. As described above, the high-voltage battery 4 and the power supply module 10 are provided in a state where the cooling plate 40 is in contact. A circulation path is provided inside the cooling plate 40, and the cooling fluid is circulated through the circulation path by the pump 21.

[0022] FIG. 3 is a block diagram schematically showing the configuration of the battery unit 1. The power supply module 10 can convert the voltage value of the output voltage of the high-voltage battery 4 into a voltage of a predetermined voltage value. Specifically, it is possible to convert the voltage value of the output voltage of the high-voltage battery 4 into a DC voltage of a voltage value capable of charging the low-voltage battery 5. Also, it is possible to convert the voltage value of the output voltage of the high-voltage battery 4 into an AC voltage of a voltage value that can be used as a commercial power supply (for example, an AC voltage with an effective value of 100 V).

[0023] Hereinafter, a mode in which the power supply module 10 operates to convert the voltage value of the output voltage of the high-voltage battery 4 into a DC voltage of a voltage value capable of charging the low-voltage battery 5 is referred to as the first mode. Also, a mode in which the power supply module 10 operates to convert the voltage value of the output voltage of the high-voltage battery 4 into an AC voltage of a voltage value that can be used as a commercial power supply via the outlet 99 is referred to as the second mode. Furthermore, a mode in which the power supply module 10 operates to convert externally supplied AC power supplied via a supply unit 98 such as an outlet plug into DC power capable of charging the high-voltage battery 4 will be described as the third mode.

[0024] The power supply module 10 includes a switching unit 41, a frequency conversion unit 42, a voltage conversion unit 43, and an air-conditioning power supply unit 44. The switching unit 41 switches between a state in which the power supply module 10 is electrically connected to a supply unit 98 such as a power outlet plug and a state in which the power supply module 10 is electrically connected to a power outlet 99. When the supply unit 98 is electrically connected to the power supply module 10 by the switching unit 41, AC power from the outside is supplied from the supply unit 98 to the frequency conversion unit 42. On the other hand, when the power outlet 99 is electrically connected to the power supply module 10 by the switching unit 41, an AC voltage can be output from the power outlet 99.

[0025] The frequency conversion unit 42 converts either AC power or DC power into the other. In the second mode, DC power is supplied to the frequency conversion unit 42 from the voltage conversion unit 43. In this case, the frequency conversion unit 42 converts the DC power supplied from the voltage conversion unit 43 into AC power (converts the frequency) so that AC power can be output from the power outlet 99. On the other hand, in the third mode, AC power is supplied to the frequency conversion unit 42 from the supply unit 98. In this case, the frequency conversion unit 42 converts the AC power supplied from the supply unit 98 into DC power (converts the frequency) and outputs the DC power to the voltage conversion unit 43.

[0026] The voltage conversion unit 43 converts the voltage value of the input DC voltage into a DC voltage having a predetermined voltage value. In the second mode, DC power is supplied to the voltage conversion unit 43 from the high-voltage battery 4 via the junction box 91. In this case, the voltage conversion unit 43 converts the voltage value of the voltage constituting the DC power from the high-voltage battery 4 into the voltage value of the voltage constituting the AC power output from the supply unit 98. On the other hand, in the third mode, DC power is supplied to the voltage conversion unit 43 from the frequency conversion unit 42. In this case, the voltage conversion unit 43 converts the voltage value of the voltage constituting the DC power supplied from the frequency conversion unit 42 into a voltage having a voltage value capable of charging the high-voltage battery 4. Thereby, the high-voltage battery 4 can be charged via the junction box 91.

[0027] In the first mode, the voltage conversion unit 43 steps down the DC voltage that constitutes the DC power transmitted from the high-voltage battery 4 via the junction box 91 to a voltage value that can charge the low-voltage battery 5, and supplies it to the low-voltage battery 5 via the connector 70 and the junction box 92. Thereby, it becomes possible to charge the low-voltage battery 5 based on the power stored in the high-voltage battery 4.

[0028] Note that in the second mode and the third mode, the first mode may be used in combination. That is, when converting the voltage value of the output voltage of the high-voltage battery 4 into an AC voltage of a voltage value that can be used as a commercial power supply (second mode), at the same time, the low-voltage battery 5 may be charged based on the DC power from the high-voltage battery 4 (first mode). Also, when converting the AC power from the outside into DC power that can charge the high-voltage battery 4 (third mode), at the same time, the low-voltage battery 5 may be charged based on the DC power from the high-voltage battery 4 (first mode). Such a voltage conversion unit 43 is preferably configured to include a transformer having a primary winding, a secondary winding, and a tertiary winding.

[0029] When driving the traveling motor M based on the power of the high-voltage battery 4, the power from the high-voltage battery 4 may be transmitted to the inverter 93 via the junction box 91, and the inverter 93 may energize the traveling motor M.

[0030] In this embodiment, the pump module 20 further has a pump driver 22 that drives the pump 21. The pump module 20 is supplied with DC power from the high-voltage battery 4. The pump driver 22 is configured to include a plurality of switching elements, converts the DC power supplied from the high-voltage battery 4 into power (AC power) suitable for driving the pump 21, and energizes the pump 21. Thereby, the pump 21 is driven.

[0031] The battery unit 1 includes a connector 51, a capacitor 52, and a discharge unit 53. In the present embodiment, power supply from the high-voltage battery 4 to the power module 10 is performed via the first connector 51A. Also, when charging the high-voltage battery 4, power output from the power module 10 to the high-voltage battery 4 is also performed via this first connector 51A. Further, power supply from the high-voltage battery 4 to the pump module 20 is performed via the second connector 51B. In the present embodiment, the first connector 51A and the second connector 51B are shared with each other. Therefore, the connector 51 is configured to include the first connector 51A and the second connector 51B.

[0032] A first capacitor 52A is provided in a first power line 54A that electrically connects the power module 10 and the first connector 51A. The first capacitor 52A is provided to smooth the ripple of the voltage applied to the first power line 54A and the ripple of the current flowing through the first power line 54A. For this reason, one terminal of the first capacitor 52A is connected to the first power line 54A, and the other terminal of the first capacitor 52A is applied with a ground potential. Also, a second capacitor 52B is provided in a second power line 54B that electrically connects the pump module 20 and the second connector 51B. The second capacitor 52B is provided to smooth the ripple of the voltage applied to the second power line 54B and the ripple of the current flowing through the second power line 54B. For this reason, one terminal of the second capacitor 52B is connected to the second power line 54B, and the other terminal of the second capacitor 52B is applied with a ground potential.

[0033] In the present embodiment, the first capacitor 52A and the second capacitor 52B are shared with each other. Therefore, the capacitor 52 is configured to include the first capacitor 52A and the second capacitor 52B. Also, in the present embodiment, a part of the first power line 54A and the second power line 54B are configured to be shared with each other. The capacitor 52 is provided across the shared portion of the first power line 54A and the second power line 54B and the ground potential.

[0034] A first discharge unit 53A for discharging the charge of the first capacitor 52A is provided on the first power line 54A. When a voltage is applied to the first power line 54A, charge is stored in the first capacitor 52A. If the charge is stored in the first capacitor 52A when no voltage is applied to the first power line 54A, it may cause leakage, and the startup sequence may also deviate from the expected one. Therefore, the first discharge unit 53A is configured to discharge the charge of the first capacitor 52A when no voltage is applied to the first power line 54A. Also, a second discharge unit 53B for discharging the charge of the second capacitor 52B is provided on the second power line 54B. When a voltage is applied to the second power line 54B, charge is stored in the second capacitor 52B. If the charge is stored in the second capacitor 52B when no voltage is applied to the second power line 54B, it may cause leakage, and the startup sequence may also deviate from the expected one. Therefore, the second discharge unit 53B is configured to discharge the charge of the second capacitor 52B when no voltage is applied to the second power line 54B.

[0035] In this embodiment, the first discharge unit 53A and the second discharge unit 53B are shared with each other. Therefore, the discharge unit 53 is configured to include the first discharge unit 53A and the second discharge unit 53B. Also, in this embodiment, a part of the first power line 54A and the second power line 54B are shared with each other, and the first capacitor 52A and the second capacitor 52B are shared with each other. Therefore, the discharge unit 53 discharges the charge of the capacitor 52 when no voltage is applied to the power line 54 (a general term for the first power line 54A and the second power line 54B).

[0036] Such a discharge unit 53 can be configured using, for example, a resistor having a predetermined resistance value. Thus, when no voltage is applied to the power line 54, the charge of the capacitor 52 can be discharged through the resistor.

[0037] Here, when the discharge unit 53 is configured using a resistor, if a voltage is applied to the power line 54, a current always flows through the resistor, resulting in a constant power loss. To reduce such power loss, the discharge unit 53 can be configured by connecting a switch (e.g., a relay or a switching element) that becomes closed with the end of the voltage application to the power line 54 in series to the above-described resistor. Thereby, the switch can be closed in response to the end of the voltage application to the power line 54, and the charge of the capacitor 52 can be discharged.

[0038] In the present embodiment, an air-conditioning power supply unit 44 is provided in the power module 10. The air-conditioning power supply unit 44 is supplied with power from the high-voltage battery 4 via the junction box 91, the connector 51, and the first power line 54A. The air-conditioning power supply unit 44 is configured to have a switching element, and converts the DC power from the high-voltage battery 4 into power suitable for driving the air-conditioning unit 8.

[0039] As described above, by sharing the first connector 51A and the second connector 51B with each other, sharing the first capacitor 52A and the second capacitor 52B with each other, and sharing the first discharge unit 53A and the second discharge unit 53B with each other, it is possible to reduce the size and weight of the battery unit 1. Further, by configuring the air-conditioning power supply unit 44 to be included in the power module 10, the first connector 51A, the first capacitor 52A, the first discharge unit 53A, and the first power line 54A can be shared. Therefore, it is possible to further reduce the size and weight of the battery unit 1.

[0040] 〔Other Embodiments〕 Next, other embodiments of the battery unit 1 will be described.

[0041] In the above embodiment, it has been described that the first connector 51A and the second connector 51B are shared with each other, the first capacitor 52A and the second capacitor 52B are shared with each other, and the first discharge unit 53A and the second discharge unit 53B are shared with each other. The battery unit 1 can also be configured by sharing at least any one of the three sets of the first connector 51A and the second connector 51B, the first capacitor 52A and the second capacitor 52B, and the first discharge unit 53A and the second discharge unit 53B with each other.

[0042] Specifically, as in Configuration a of FIG. 4, the first connector 51A and the second connector 51B can be configured to be shared with each other, the first capacitor 52A and the second capacitor 52B can be configured separately from each other, and the first discharge unit 53A and the second discharge unit 53B can be configured separately from each other. Also, as in Configuration b of FIG. 4, the first connector 51A and the second connector 51B can be configured separately from each other, the first capacitor 52A and the second capacitor 52B can be configured to be shared with each other, and the first discharge unit 53A and the second discharge unit 53B can be configured separately from each other. Furthermore, as in Configuration c of FIG. 4, the first connector 51A and the second connector 51B can be configured separately from each other, the first capacitor 52A and the second capacitor 52B can be configured separately from each other, and the first discharge unit 53A and the second discharge unit 53B can be configured to be shared with each other.

[0043] Also, as in configuration d of FIG. 4, the first connector 51A and the second connector 51B can be configured to be shared with each other, the first capacitor 52A and the second capacitor 52B can be configured to be shared with each other, and the first discharge unit 53A and the second discharge unit 53B can be configured separately from each other. Further, as in configuration e of FIG. 4, the first connector 51A and the second connector 51B can be configured separately from each other, the first capacitor 52A and the second capacitor 52B can be configured to be shared with each other, and the first discharge unit 53A and the second discharge unit 53B can be configured to be shared with each other. Furthermore, as in configuration f of FIG. 4, the first connector 51A and the second connector 51B can be configured to be shared with each other, the first capacitor 52A and the second capacitor 52B can be configured separately from each other, and the first discharge unit 53A and the second discharge unit 53B can be configured to be shared with each other.

[0044] In the above embodiment, the pump module 20 has been described as having the pump driver 22. However, the pump module 20 may not have the pump driver 22 and may be configured separately.

[0045] In the above embodiment, the power supply module 10 has been described as including the frequency conversion unit 42 and the voltage conversion unit 43. However, the power supply module 10 may be configured to include either one of the frequency conversion unit 42 and the voltage conversion unit 43.

[0046] In the above embodiment, the power supply module 10 has been described as being configured to include the air-conditioning power supply unit 44. However, the power supply module 10 may be configured without including the air-conditioning power supply unit 44, or may be configured to include a power supply unit that supplies power to another device different from the air-conditioning unit 8.

[0047] 〔Summary of the above embodiment〕 Hereinafter, the outline of the battery unit 1 described above will be described.

[0048] (1) The battery unit 1 includes a power supply module 10 capable of converting the voltage value of the output voltage of the high-voltage battery 4 in which the electric power supplied to the traveling motor M of the vehicle 2 is stored into a voltage of a predetermined voltage value, a pump module 20 having a pump 21 for circulating a cooling fluid across the high-voltage battery 4 and the power supply module 10, and a housing 30 for housing the power supply module 10 and the pump module 20 together with the high-voltage battery 4. In the housing 30, the pump module 20 and the power supply module 10 are arranged on the front side F in the traveling direction of the vehicle 2 with respect to the high-voltage battery 4.

[0049] According to this configuration, since the power supply module 10 and the pump module 20 are housed in the housing 30 together with the high-voltage battery 4 (battery), the battery unit 1 can be miniaturized. Further, by housing the power supply module 10 and the pump module 20 in the housing 30 together with the high-voltage battery 4, the length of the harness for electrically connecting the power supply module 10, the pump module 20, and the high-voltage battery 4 can be shortened. Also, since the pump module 20 and the power supply module 10 are arranged on the front side of the high-voltage battery 4, the length of the piping for connecting to the cooling plate 40 can be shortened for devices such as the air conditioning unit 8 and the radiator (not shown) that must be arranged on the front side of the vehicle. Therefore, it is possible to reduce the power loss and the piping length in the harness, and further suppress the cost increase of the battery unit 1 and achieve miniaturization.

[0050] (2) In the battery unit 1 described in (1), the pump module 20 further includes a pump driver 22 that drives the pump 21, a first connector 51A through which power is supplied from the high-voltage battery 4 to the power supply module 10, a second connector 51B through which power is supplied from the high-voltage battery 4 to the pump module 20, a first capacitor 52A provided in a first power line 54A that electrically connects the power supply module 10 and the first connector 51A, a second capacitor 52B provided in a second power line 54B that electrically connects the pump module 20 and the second connector 51B, a first discharge unit 53A that discharges the charge of the first capacitor 52A, and a second discharge unit 53B that discharges the charge of the second capacitor 52B. It is preferable that at least one of the three sets is shared with each other.

[0051] According to this configuration, since at least one of the three sets of the first connector 51A and the second connector 51B, the first capacitor 52A and the second capacitor 52B, and the first discharge unit 53A and the second discharge unit 53B is shared with each other, the number of components can be reduced. Therefore, the battery unit 1 can be further miniaturized.

[0052] (3) In the battery unit 1 described in (1) or (2), it is preferable that the power supply module 10 includes a frequency conversion unit 42 that converts one of AC power and DC power into the other, and a voltage conversion unit 43 that converts the voltage value of the input DC voltage into a DC voltage of a predetermined voltage value.

[0053] According to this configuration, even when the power supply module 10 provided in the battery unit 1 can be used during charging of the high-voltage battery 4 or when using the power stored in the high-voltage battery 4, the battery unit 1 can be miniaturized.

[0054] (4) In the battery unit 1 described in any one of (1) to (3), it is preferable that the power supply module 10 further includes an air-conditioning power supply unit 44 that supplies power to the air-conditioning unit 8 that performs air conditioning in the passenger compartment 3.

[0055] According to this configuration, the length of the harness electrically connecting the air-conditioning power supply unit 44 and the high-voltage battery 4 can be shortened. Therefore, in the vehicle 2 equipped with the air-conditioning unit 8, the battery unit 1 can be miniaturized. Also, power loss in the harness electrically connecting the air-conditioning power supply unit 44 and the high-voltage battery 4 can be reduced, and an increase in cost can be suppressed.

Industrial Applicability

[0056] The technology according to the present disclosure can be used for a battery unit mounted on a vehicle.

Explanation of Reference Numerals

[0057] 1: Battery unit, 2: Vehicle, 3: Passenger compartment, 4: High-voltage battery (battery), 8: Air-conditioning unit, 10: Power supply module, 20: Pump module, 21: Pump, 22: Pump driver, 30: Housing, 42: Frequency conversion unit, 43: Voltage conversion unit, 44: Air-conditioning power supply unit, 51A: First connector, 51B: Second connector, 52A: First capacitor, 52B: Second capacitor, 53A: First discharge unit, 53B: Second discharge unit, 54A: First power line, 54B: Second power line, F: Front side in the traveling direction, M: Traction motor

Claims

1. A power supply module capable of converting the voltage value of the output voltage of a battery storing the power supplied to a driving motor of a vehicle into a voltage of a predetermined voltage value, a pump module having a pump for circulating a cooling fluid across the battery and the power supply module, a housing for housing the power supply module and the pump module together with the battery, and a battery unit in which the pump module and the power supply module are arranged in front of the battery in the traveling direction of the vehicle within the housing.

2. The pump module further has a pump driver for driving the pump, a first connector for supplying power from the battery to the power supply module and a second connector for supplying power from the battery to the pump module, a first capacitor provided on a first power line electrically connecting the power supply module and the first connector and a second capacitor provided on a second power line electrically connecting the pump module and the second connector, The battery unit according to claim 1, wherein at least one of the three sets of a first discharge unit for discharging the charge of the first capacitor and a second discharge unit for discharging the charge of the second capacitor is shared with each other.

3. The power supply module includes a frequency conversion unit that converts one of AC power and DC power into the other, and a voltage conversion unit that converts the voltage value of the input DC voltage into a DC voltage of a predetermined voltage value. The battery unit according to claim 1 or 2.

4. The power supply module further includes an air-conditioning power supply unit for supplying power to an air-conditioning unit that performs air-conditioning in the passenger compartment. The battery unit according to claim 1 or 2.

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