JP2014099998A - Charger unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charger unit in which a charger and a line filter are stored in the same housing to downsize the charger unit while influences of electromagnetic noise are prevented.SOLUTION: A vehicle charger unit 10 includes: a charger circuit 21 which charges an on-vehicle battery by electric power supplied from an external power source; an AC filter 22 disposed at a feeder cable which connects the charger circuit 21 with the external power source; and a housing 20 which is formed by a conductive member and houses the charger circuit 21. The housing 20 includes a dividing wall 34 which divides an internal space into a first housing chamber 35 and a second housing chamber 36. The charger circuit 21 is housed in the first housing chamber 35, and the AC filter 22 is housed in the second housing chamber 36.

Description

  The present invention relates to a structure of a housing for storing a charger in a charger unit mounted on a vehicle.

An electric vehicle and a plug-in hybrid vehicle that have been developed in recent years can be connected to an external power source to charge an in-vehicle battery, and the vehicle is equipped with a charger.
The charger has electronic parts that generate relatively strong electromagnetic noise, such as a switching element, and is usually housed in a metal casing such as aluminum. Further, there are some cases having a cooling water channel in the casing in order to cool the switching element and the like.

  In addition, since the charger mounted on the vehicle in this way is connected to the external power supply by a power supply line, noise enters the charger from the external power supply side through the power supply line, or conversely from the charger to the external There is a risk of noise entering the power supply. Therefore, a line filter is generally interposed between the charger and the power cord. Since this line filter has a rectifying coil and may be affected by electromagnetic noise, it is housed in a casing that blocks electromagnetic noise.

  As a structure for housing an in-vehicle electrical device in a housing, a structure in which an in-vehicle electrical device and a line filter connected to the in-vehicle electrical device are housed in the housing is known, for example.

JP 2005-287273 A

In-vehicle electrical devices such as chargers and line filters as described above are all housed in electromagnetic noise shielding housings. However, if they are individually housed in the housings, the number of housings increases and the vehicle mounting space increases. It will increase.
Therefore, when the in-vehicle electrical device and the line filter are stored in one housing as in Patent Document 1, in the case where the in-vehicle electrical device is a device that strongly generates electromagnetic noise such as a charger, the charger, the line filter, There is a risk that they may be affected by electromagnetic noise.

  The present invention has been made to solve the above-described problems, and the object of the present invention is to accommodate the charger and the line filter in the same housing while preventing the influence of electromagnetic noise. The object is to provide a charger unit that can be miniaturized.

  In order to achieve the above object, the charger unit according to claim 1 is provided with a charger for charging an in-vehicle battery for driving by being supplied with power from an external power source outside the vehicle, and supplying power to the charger from the external power source. A charger unit for a vehicle including a line filter interposed in a power supply line and a casing for storing a charger, wherein the casing is formed of a conductive member and has a first internal space. And a second storage chamber, a charger is stored in the first storage chamber, and a line filter is stored in the second storage chamber. To do.

Moreover, the charger unit of claim 2 according to claim 1, wherein the housing further includes a second partition portion that partitions the second storage chamber into a third storage chamber and a fourth storage chamber. The line filter is stored in the third storage chamber, and the in-vehicle electrical equipment other than the charger and the line filter is stored in the fourth storage chamber, which is smaller than the charger.
According to a third aspect of the present invention, there is provided the charger unit according to the second aspect, wherein the in-vehicle electrical device is a converter that converts an output voltage from the in-vehicle battery.

  According to a fourth aspect of the present invention, in the charger unit according to any one of the first to third aspects, the housing has openings on the upper surface and the lower surface, respectively, and a partition is provided at an intermediate portion in the vertical direction inside. A housing body, an upper lid and a lower lid that cover the opening, and a lid member that divides the space in the housing up and down into a first storage chamber and a second storage chamber together with the partition; Functions as the first partition portion.

According to a fifth aspect of the present invention, there is provided the charger unit according to the fourth aspect, wherein a cooling water channel for the charger is formed in the first partition portion, and the cooling water channel is formed by covering a groove provided in the partition wall with a lid member. It is characterized by that.
The charger unit according to claim 6 is characterized in that, in any one of claims 1 to 5, a power connector is provided on one surface of the housing, and the line filter is accommodated along the one surface. .

  According to the charger unit of the first aspect, the casing for storing the charger is formed of a conductive member that blocks electromagnetic noise, and the first partition portion and the second storage chamber are separated by the first partition portion. Since the charger is stored in the first storage chamber and the line filter is stored in the second storage chamber, the charger and the line filter are stored in the same housing. The space can be reduced, and the influence of electromagnetic noise between the charger and the line filter can be prevented from each other.

  According to the charger unit of the second aspect, the second storage chamber is partitioned into the third storage chamber and the fourth storage chamber by the second partition, and the line filter is stored in the third storage chamber. In addition, since the in-vehicle electrical equipment other than the charger and the line filter is accommodated in the fourth storage room, which is smaller than the charger, the in-vehicle electrical equipment is accommodated in the same housing and the fourth storage room is effectively used. In addition, it is possible to reduce the vehicle mounting space of the charger, the line filter, and the in-vehicle electric device, and to prevent the influence of electromagnetic noise between the charger, the line filter, and the in-vehicle electric device. it can.

According to the charger unit of the third aspect, since the in-vehicle electric device housed in the second housing chamber is a converter, the charger, the line filter, and the converter are the same while preventing the influence of electromagnetic noise with each other. The vehicle mounting space can be reduced by accommodating the housing.
According to the charger unit of claim 4, since the housing includes the housing main body having openings on the upper surface and the lower surface, and the upper lid and the lower lid that cover the opening, the openings on the upper surface and the lower surface. The charger and the line filter can be easily stored in the first storage chamber and the second storage chamber from the first section, and the first partition section is configured by the partition wall and the lid member, and the first partition lined up and down. Electromagnetic noise can be blocked between the storage chamber and the second storage chamber.

  According to the charger unit of the fifth aspect, since the first partition portion is provided by utilizing the part of the casing in which the cooling water channel of the charger is formed, the casing can be reduced in size. Can do. In addition, if a charger or line filter is housed in each housing and a cooling water passage is provided in each housing, the cooling water circulation passage for circulating the cooling water may be complicated, but the groove provided in the partition wall Since the cooling water channel is formed by covering the cover with the lid member, the cooling water channel can be easily formed in the housing.

  According to the charger unit of claim 6, the line filter is housed along one surface of the housing where the power connector is provided, so that the current input position of the charger unit and the line filter are arranged close to each other. Thus, electromagnetic noise that enters the charger from the external power source side through the power connector can be efficiently blocked.

It is a schematic block diagram of the electric vehicle carrying the charger unit which concerns on one Embodiment of this invention. It is a perspective view which shows the external appearance of the charger unit of this embodiment. It is an assembly drawing which shows the internal structure of a charger unit. It is a top view of the charger unit in a state where an upper lid is opened. It is a bottom view of the charger unit in a state where the lower lid is opened. It is a longitudinal cross-sectional view of a charger unit. It is a longitudinal cross-sectional view which shows the structure of the water channel for cooling of a charger unit.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram of an electric vehicle 1 equipped with a charger unit 10 according to an embodiment of the present invention.
The electric vehicle 1 according to the present embodiment is driven by supplying electric power to the traveling motor 5 from the driving battery 3 mounted on the vehicle body 2 via the inverter 4. The vehicle body 2 is equipped with an in-vehicle charger 6 for charging the driving battery 3. The in-vehicle charger 6 is connected to a 100V or 200V external AC power source via the connection cord 7 and outputs a high-voltage DC current to charge and drive the drive battery 3 by transforming and rectifying the AC.

Further, the vehicle body 2 is provided with a DC-DC converter 9 (converter) for converting a DC voltage in order to supply electric power from the high voltage driving battery 3 to the low voltage auxiliary battery 8.
In the present embodiment, the on-vehicle charger 6 and the DC-DC converter 9 are combined into one, and are mounted on the vehicle body 2 as the charger unit 10.

In addition, the vehicle body 2 is provided with a cooling water circulation path 11 for cooling the inverter 4 and the on-vehicle charger 6. The cooling water circulation path 11 can circulate the cooling water through a radiator 12 and an electric pump 13.
FIG. 2 is a perspective view showing an appearance of the charger unit 10 of the present embodiment. FIG. 3 is an assembly diagram illustrating an internal configuration of the charger unit 10. FIG. 4 is a top view of the charger unit 10 with the upper lid 31 opened. FIG. 5 is a bottom view of the charger unit 10 with the lower lid 32 opened. FIG. 6 is a longitudinal sectional view of the charger unit 10. FIG. 7 is a longitudinal sectional view showing the structure of the cooling water channel 37 in the charger unit 10. 6 is a cross-sectional view taken along the line AA shown in FIG. 4, and FIG. 7 is a cross-sectional view taken along the line BB shown in FIG. 6 and 7 show a cross section of the charger unit 10 with the upper lid 31 and the lower lid 32 attached thereto.

As shown in FIGS. 2 and 3, the charger unit 10 includes a charger circuit 21 (charger) that is a main body of the in-vehicle charger 6 and an AC filter 22 (line) in a rectangular box-shaped housing 20. Filter) and a DC-DC converter 9 are housed.
The AC filter 22 has a function of blocking noise conducted on the power supply line.
The casing 20 has a box-shaped casing main body 30 having an open upper surface and a lower surface, an upper lid 31, a lower lid 32, and a water channel lid 33 (lid member) that divides the interior of the casing 20 up and down. doing. Each component of the casing 20, that is, the casing main body 30, the upper lid 31, the lower lid 32, and the water channel lid 33 is formed of a conductive member capable of shielding electromagnetic noise, for example, a metal such as aluminum.

As shown in FIGS. 4, 6, and 7, the housing main body 30 is provided with a partition wall 34 at the center in the vertical direction. By the partition wall 34, the space in the housing 20 is partitioned into an upper first storage chamber 35 and a lower second storage chamber 36.
The charger circuit 21 is fixed on the upper surface of the partition wall 34.
As shown in FIGS. 4 and 7, the partition wall 34 is formed with a cooling water channel 37 for circulating the cooling water. The cooling water channel 37 is a communication between the rectangular groove portion 38 provided in the partition wall 34 and the lower surface of the partition wall 34, which communicates the groove portion 38 and the opening portion 40 provided in the right side wall 39 of the housing body 30. The passage 41 is formed by a communication passage 44 that communicates the groove 38 and the opening 43 provided in the front side wall 42 of the housing body 30. The groove portion 38 is exposed on the upper and lower surfaces of the partition wall 34. One of the opening 40 provided on the right side wall 39 of the housing body 30 and the opening 43 provided on the front side wall 42 is an inlet for cooling water, and the other is an outlet for cooling water. Are connected to the cooling water circulation path 11.

The upper surface side of the groove portion 38 provided in the partition wall 34 is sealed by inserting a heat radiating plate 45 provided on the lower surface of the charger circuit 21. The heat radiating plate 45 is connected to a heat generation source of the charger circuit 21, for example, a switching element, and cools the heat generation source.
Further, the lower surface side of the groove portion 38 and the communication passages 41 and 44 is sealed with a water channel lid 33. The water channel lid 33 is a plate-like member and is formed so as to cover the entire lower surface of the partition wall 34.

The partition wall 34 and the water channel lid 33 correspond to the first partition portion of the present invention.
The DC-DC converter 9 and the AC filter 22 are fixed to the lower surface of the water channel lid 33.
As shown in FIGS. 5 to 7, the water channel lid 33 has a partition portion 52 (in which the second storage chamber 36 is further divided into two storage chambers (a third storage chamber 50 and a fourth storage chamber 51)). A second partition part) is provided. The partition 52 is formed of a metal plate such as aluminum having a thickness of about 4 mm that sufficiently shields electromagnetic noise and is easy to manufacture, extends in the front-rear direction through the second storage chamber 36, and has a lower end. While extending until it comes close to the lower lid 32, the front end extends to the inner wall surface of the front side wall 42 of the housing body 30 and the rear end extends to the inner wall surface of the rear side wall 46.

Of the third storage chamber 50 and the fourth storage chamber 51 partitioned by the partition portion 52, the third storage chamber 50 is formed smaller than the fourth storage chamber 51, and this third storage chamber 50. The AC filter 22 is stored in the first storage chamber 51, and the DC-DC converter 9 is stored in the fourth storage chamber 51.
Further, as shown in FIGS. 4 to 6, the partition wall 34 and the water channel lid 33 of the housing body 30 have a communication hole extending upward from the corner of the third storage chamber 50 toward the first storage chamber 35. 57 is provided.

A power connector 55 for AC input is provided on the right side wall 39, which is one surface of the housing body 30, facing the third storage chamber 50. That is, the AC filter 22 is stored in the third storage chamber 50 along the right side wall 39 of the housing body 30 provided with the power connector 55. An output connector 56 for direct current output is provided facing the first storage chamber 35.
The power connector 55 and the input terminal of the AC filter 22 are connected by a power supply line 58, and the output terminal of the AC filter 22 and the input terminal of the charger circuit 21 are connected by a power supply line 59 that passes through the communication hole 57. Yes. Further, the output terminal of the charger circuit 21 and the output connector 56 are connected by an output electric wire 60.

On the other hand, an input connector 61 and an output connector 62 to the DC-DC converter 9 are provided on the left side wall 47 facing the fourth storage chamber 51 of the housing body 30, and the connectors 61, 62 and the DC are connected to the DC-DC converter 9. The DC converter 9 is connected by electric wires 63 and 64, respectively.
With the structure as described above, in the charger unit 10, the internal space of the housing 20 that houses the charger circuit 21 is vertically separated by the partition wall 34 and the water channel lid 33 provided in the housing body 30. The chamber is divided into a storage chamber 35 and a second storage chamber 36. A cooling water channel 37 is provided in the partition wall 34 of the housing main body 30, and the charger circuit 21 is cooled by passing the cooling water, and the DC-DC converter 9 and the AC are connected via the water channel lid 33. It is possible to cool the filter 22.

  In the present embodiment, the first storage chamber 35 and the second storage chamber 36 in the housing 20 are electromagnetically shielded by the partition wall 34 and the water channel lid 33 provided with the cooling water channel 37. It has become. Therefore, the charger circuit 21 accommodated in the first storage chamber 35, the AC filter 22, and the DC-DC converter 9 have a structure that can prevent the influence of electromagnetic noise. In particular, the electromagnetic noise generated from the switching elements and the like provided in the charger circuit 21 is large, and the coil shape provided in the AC filter 22 is relatively large. Although there is a possibility of being easily affected by noise, the electromagnetic noise can be sufficiently blocked and prevented by shielding with relatively thick conductive members such as the partition wall 34 and the water channel lid 33 as described above.

Then, by preventing the influence of electromagnetic noise, both the charger circuit 21 and the AC filter 22 can be accommodated in one housing 20, and the vehicle mounting without increasing the number of components mounted on the vehicle. Space can be reduced and component costs can be reduced.
Further, since the first storage chamber 35 and the second storage chamber 36 are shielded by using the partition wall 34 and the water channel lid 33 of the housing body 30 in which the cooling water channel 37 is formed, strong electromagnetic noise is generated. The housing 20 can be downsized while ensuring a sufficient thickness to shield the screen.

  Further, in the present embodiment, the partition cover 52 is provided in the water channel lid 33, the second storage chamber 36 is further divided into a third storage chamber 50 and a fourth storage chamber 51, and the third storage The chamber 50 and the fourth storage chamber 51 are electromagnetically shielded from each other. Therefore, it is possible to prevent the influence of electromagnetic noise between the AC filter 22 stored in the third storage chamber 50 and the DC-DC converter 9 stored in the fourth storage chamber 51.

  Thus, the charger circuit is formed by partitioning the second storage chamber 36 into the third storage chamber 50 and the fourth storage chamber 51 that shield electromagnetic noise by the partition portion 52 provided in the water channel lid 33. In the second storage chamber 36 storing the AC filter 22 smaller than 21, the DC-DC converter 9 is stored using the surplus space, and the space in the housing 20 is used effectively, Thus, the size of the vehicle 20 can be further reduced, and the vehicle mounting space of the in-vehicle electrical device can be further suppressed.

  In the present embodiment, the AC filter 22 is stored in the third storage chamber 50 along the right side wall 39 that is one surface of the housing main body 30 where the power connector 55 is provided. Therefore, the current input position of the charger unit 10 and the AC filter 22 can be arranged close to each other, and electromagnetic noise that enters the charger circuit 21 from the external power supply side through the power connector 55 is effectively cut off. be able to.

In addition, this invention is not limited to the above embodiment. For example, in the above embodiment, the DC-DC converter 9 is stored in the fourth storage chamber 51, but other in-vehicle electrical devices may be stored in the fourth storage chamber 51.
Moreover, in the said embodiment, although the 2nd storage chamber 36 is divided into the 3rd storage chamber 50 and the 4th storage chamber 51 by the partition part 52 (2nd partition part), the partition part 52 is used. It can be unnecessary. For example, when in-vehicle electric devices other than the charger circuit 21 and the AC filter 22 (line filter) are arranged outside the housing 20, or when the in-vehicle electric devices are stored in the first storage chamber 35, there is no problem. The AC filter 22 may be arranged in the second storage chamber 36 without partitioning the second storage chamber 36 into the third storage chamber 50 and the fourth storage chamber 51. Even in such a configuration, the cooling water channel 37 is configured by the partition wall 34 and the water channel lid 33 (lid member) that divide the first storage chamber 35 and the second storage chamber 36, thereby enabling cooling of the device. However, the partition wall 34 and the water channel lid 33 formed of a conductive member can prevent the influence of electromagnetic noise without adding a new shield member.

Further, the installation position, the number, and the like of the partition part 52 may be appropriately set according to the size of the AC filter 22, the DC-DC converter 9, or the like, or the number of in-vehicle electrical devices housed in the housing 20.
The invention of the present application can be widely applied to vehicles equipped with the on-vehicle charger 6, and can be applied to, for example, a plug-in hybrid vehicle.

1 Electric vehicle 9 DC-DC converter (converter)
DESCRIPTION OF SYMBOLS 10 Charger unit 20 Case 21 Charger circuit 22 AC filter (line filter)
30 Housing body 31 Upper lid 32 Lower lid 33 Water channel lid (lid member, first partition)
34 Bulkhead (first partition)
35 First storage chamber 36 Second storage chamber 37 Cooling channel 50 Third storage chamber 51 Fourth storage chamber 52 Partition (second partition)
55 Power connector

Claims (6)

A charger that is supplied with electric power from an external power source outside the vehicle and charges the on-vehicle battery for driving; a line filter that is interposed in a power supply line that supplies power to the charger from the external power source; and the charger A vehicle charger unit having a housing for storing
The housing includes a first partition portion that is formed of a conductive member and partitions an internal space into a first storage chamber and a second storage chamber,
The vehicle charger unit, wherein the charger is stored in the first storage chamber, and the line filter is stored in the second storage chamber. The housing further includes a second partition that divides the second storage chamber into a third storage chamber and a fourth storage chamber,
The line filter is stored in the third storage chamber, and in-vehicle electric devices smaller than the charger and other than the charger and the line filter are stored in the fourth storage chamber. 1. The vehicle charger unit according to 1.   3. The vehicle charger unit according to claim 2, wherein the in-vehicle electric device is a converter that converts an output voltage from the in-vehicle battery. The casing has an opening on each of the upper surface and the lower surface, and a casing main body provided with a partition in the middle in the vertical direction inside, an upper cover and a lower cover that cover the opening, and the casing together with the partition. A lid member that vertically divides a space in the body into the first storage chamber and the second storage chamber;
4. The vehicle charger unit according to claim 1, wherein the partition wall and the lid member function as the first partition portion. 5. A cooling water channel for the charger is formed in the first partition part,
5. The vehicle charger unit according to claim 4, wherein the cooling water channel is formed by covering a groove provided in the partition wall with the lid member. 6. A power connector is provided on one side of the housing,
The said line filter is accommodated along the said one surface, The charger unit of the vehicle of any one of Claim 1 to 5 characterized by the above-mentioned.

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