JP2013085399A - Quick charger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small quick charger which achieves both improvements of the maintainability and heat radiation performance of multiple charging units housed in a housing.SOLUTION: A quick charger 1A according to this invention includes: a box shaped housing extending in a vertical direction; at least one duct 21 extending in a vertical direction in the housing; air flow means (6, 7, 30) allowing air outside the housing to flow in one direction from a lower end to an upper end of the duct 21; and charging units 10 (10a-1, 2, 10b-1, 2, 10c-1, 2) detachably attached to the housing. Parts (11, 12) of the charging units 10 form a wall surface of the duct 21, protrude into the duct 21, and are air-cooled by air flowing in the duct 21.

Description

  The present invention relates to a quick charger for charging an in-vehicle battery of an electric vehicle.

  In recent years, rapid chargers for charging an on-vehicle battery of an electric vehicle to about 80% in a short time have been actively developed. As described in Non-Patent Document 1, the quick charger includes a type in which the AC / DC converter is configured by one high-output charging unit (hereinafter referred to as “single unit type”), and a plurality of units connected in parallel. There is a type (hereinafter referred to as “multiple unit type”) in which the AC / DC converter is constituted by the charging unit.

  FIG. 11A shows a single unit type quick charger. As shown in the figure, the quick charger includes an AC / DC converter 102A that converts three-phase AC power (AC 200 [V]) input from the external AC power source 100 via the leakage breaker 101 into DC. . The AC / DC converter 102 </ b> A has one high-output charging unit 103, and the output power of the high-output charging unit 103 is supplied to the in-vehicle battery 200 via the charging connector 108.

  The high output charging unit 103 includes a converter 104 that converts the three-phase AC 200 [V] into a predetermined DC voltage, an inverter 105 that converts the DC voltage into a high-frequency AC voltage, a high-frequency insulation transformer 106, and a high-frequency insulation transformer 106. And a rectifier 107 for rectifying and smoothing an AC voltage induced in the secondary winding. In this type of quick charger, the output power of the high-power charging unit 103 is supplied to the in-vehicle battery 200 as it is.

  On the other hand, in the multi-unit type quick charger, as shown in FIG. 11B, the AC / DC converter 102B has a plurality of charging units 103a, 103b, and 103c, and the charging units 103a, 103b, and 103c The sum of the output power is supplied to the in-vehicle battery 200. More specifically, charging unit 103a outputs DC power generated from a-phase component and b-phase component of three-phase AC power to in-vehicle battery 200. Similarly, charging units 103b and 103c supply in-vehicle battery 200 with DC power generated from the a-phase component and c-phase component and DC power generated from b-phase component and c-phase component, respectively.

  Note that the AC / DC converter 102B may have more charging units. For example, when the output power per charging unit is a [kW] and the power to be supplied to the in-vehicle battery 200 is a × 9 [kW], three charging units 103a, 103b, and 103c are provided. Just do it. That is, in this case, the AC / DC converter 102B is configured by a total of nine charging units.

  The single unit quick charger shown in FIG. 11A has the advantage that the design can be simplified because the number of parts is small, but AC / DC conversion is performed whenever the specifications (especially output power) change. Since the part 102A has to be redesigned, there are problems that it takes time and it is difficult to reduce the cost.

  On the other hand, the multi-unit type quick charger shown in FIG. 11 (B) is easy to configure each charging unit with general-purpose parts, and moreover, a plurality of charging units are used for one quick charger. There is an advantage that the cost of the charging unit can be easily reduced due to the mass production effect. Further, the multi-unit type quick charger has an advantage that even if a failure occurs in some of the charging units, only the charging unit needs to be replaced, so that maintenance is easy.

“Specifications, structure and installation of rapid charging equipment”, [online], December 17, 2010, CHAdeMO Council, [searched September 26, 2011], Internet <URL: http: // www. fdma.go.jp/neuter/topics/denki_jidousya/pdf/dai1_siryou3.pdf>

  By the way, in order to spread the charging infrastructure in earnest, it is essential to reduce the size of the quick charger (reduction of the installation area) and reduce the cost. For this reason, recently, a multi-unit type quick charger which is advantageous for cost reduction has become mainstream.

  However, as miniaturization progresses in a multi-unit type quick charger, a plurality of charging units are arranged close to each other in the housing, and the temperature inside the housing rises due to heat generated by each charging unit. there were. If the temperature in the housing rises excessively, the operation of the charging unit becomes unstable or the frequency of failure increases. For this reason, in the multi-unit type quick charger, it is important to improve the heat dissipation of the charging unit.

  In addition, from the viewpoint of stable operation of the charging infrastructure, it is also important that the multi-unit type quick charger is excellent in maintainability.

  This invention is made | formed in view of the said situation, The place made into the subject can make the improvement of maintainability and the improvement of the heat dissipation of the several charging unit accommodated in the housing | casing compatible. The aim is to provide a small quick charger.

  In order to solve the above problems, a quick charger according to the present invention is a quick charger that charges a battery by the sum of electric powers output from a plurality of charging units, and is a box-shaped housing extending in a vertical direction. Each of the plurality of charging units, the body, at least one duct extending in the longitudinal direction in the housing, and air flow means for allowing air outside the housing to flow in one direction from the lower end to the upper end of the duct. Is detachably attached to the housing, and a part of each charging unit constitutes one wall surface of the duct, protrudes into the duct, and is air-cooled by air flowing through the duct. .

  In this configuration, since the charging unit is detachably attached to the housing, the charging unit can be easily replaced. In this configuration, the charging unit is a part of the duct, and the number of parts can be reduced. That is, according to this configuration, maintainability can be improved.

  In this configuration, a part of the charging unit protrudes into the duct, and the part continues to be exposed to fresh air flowing in the duct in one direction. Therefore, according to this structure, the heat dissipation of the charging unit can be improved.

  Various configurations of the charging unit are conceivable. For example, when the charging unit is configured by a base plate, a heat generating component joined to the surface of the base plate, and a plurality of heat radiation fins protruding from the back surface of the base plate, Projecting into the duct, the heat-generating component can be efficiently dissipated.

  Various configurations of the duct are also conceivable. For example, when the duct is configured by four side plates constituting a pair of opposing wall surfaces, at least one of the four side plates is a charging unit. By using the base plate, the charging unit can be easily made a part of the duct.

  The quick charger further includes a shelf plate that divides the space in the housing into a plurality of space layers adjacent in the vertical direction, and the surface of the shelf plate has a pair of widths corresponding to the thickness of the base plate of the charging unit. It is preferable that the charging unit is attached by inserting a base plate into the pair of guides in a state in which the guide is provided and the radiating fins face the inside of the duct. According to this configuration, the charging unit can be easily attached to and detached from the housing (shelf plate), but the radiating fins can immediately protrude into the duct when the unit is mounted.

  Further, when the charging unit converts AC power input from the outside via the input bus bar into predetermined DC power and supplies the DC power to the battery via the output bus bar, the charging unit and the input It is preferable that the connection with the bus bar and the connection between the charging unit and the output bus bar are made by a detachable connector that does not require a tool. According to this configuration, the charging unit can be easily attached and detached.

  ADVANTAGE OF THE INVENTION According to this invention, the small quick charger which can make compatible the improvement of maintainability and the improvement of the heat dissipation of the several charging unit accommodated in the housing | casing can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external view of the quick charger which concerns on this invention, Comprising: (A) is a front view, (B) is a right view, (C) is a rear view, (D) is a left view. It is a charging unit used in the quick charger which concerns on this invention, Comprising: (A) is a top view, (B) and (C) are the side views seen from another angle, respectively. It is a figure which shows the internal structure of the quick charger which concerns on this invention, Comprising: (A) is a front view, (B) is a left view. It is a top view which shows the internal structure of the quick charger which concerns on this invention. It is a figure for demonstrating the assembly method of the duct in the quick charger which concerns on this invention. It is a schematic diagram which shows the flow of the air in 1st Embodiment of this invention. It is a schematic diagram which shows the flow of the air in 2nd Embodiment of this invention. It is a schematic diagram which shows the flow of the air in 3rd Embodiment of this invention. It is a schematic diagram which shows the flow of the air in 4th Embodiment of this invention. It is a schematic diagram which shows the flow of the air in 5th Embodiment of this invention. It is a block diagram of a quick charger, (A) is a single unit type quick charger, (B) is a multiple unit type quick charger.

  Hereinafter, preferred embodiments of a quick charger according to the present invention will be described with reference to the accompanying drawings.

[First Embodiment]
FIG. 1 is an external view of a quick charger according to the first embodiment of the present invention. The rapid charger 1A according to the present embodiment is a multi-unit type rapid charger in which the AC / DC converter is configured by nine charging units (see FIG. 11B).

  As shown in each drawing of FIG. 1, the quick charger 1 </ b> A includes a box-shaped housing 2 extending in the vertical direction and a pedestal portion 2 f that supports the box-shaped housing 2. The housing 2 includes a front panel 2a, a right side panel 2b, a back panel 2c, a left side panel 2d, and a ceiling panel 2e. The front panel 2a is provided with an interface unit 3 including operation buttons and a display. The control board for controlling each charging unit is divided into two boards and attached to the front panel 2a side. A plurality of slits are formed below the right side panel 2b and above the back panel 2c and the left side panel 2d. The slit in the right side panel 2b is an intake port 6 for taking in fresh air from the outside into the casing 2, and the slit in the back panel 2c and the left side panel 2d exhausts the air in the casing 2. It is the exhaust port 7 for this.

  In addition, the quick charger 1A includes a charging cable 4 drawn from above the right side panel 2b and a charging gun 5 provided at the tip thereof. Note that all or part of the charging cable 4 and the charging gun 5 are omitted in the drawings other than FIG.

  FIG. 2 shows the charging unit 10 accommodated in the housing 2. As described above, in the quick charger 1A according to this embodiment, nine charging units 10 are accommodated in the housing 2, and the quick charger 1A as a whole outputs power of about 30 [kW]. Can do.

  The charging unit 10 corresponds to the charging unit 103a and the like in FIG. 11B, and includes a converter 104 that converts three-phase AC200 [V] into a predetermined DC voltage, and an inverter that converts the DC voltage into a high-frequency AC voltage. 105, a high-frequency insulation transformer 106, and a rectifier 107 that rectifies and smoothes an AC voltage induced in the secondary winding of the high-frequency insulation transformer 106.

  The charging unit 10 includes a base plate 11 having a rectangular shape in plan view and a plurality of heat radiation fins 12 protruding from the back surface of the base plate 11. The radiating fins 12 extend in the long side direction of the base plate 11. In the present embodiment, 28 radiating fins 12 are arranged at equal intervals. The base plate 11 and the heat radiating fins 12 are integrally formed of aluminum.

  On the surface of the base plate 11, among components constituting the converter 104 and the inverter 105, a component that generates a large amount of heat (for example, a switching element such as an IGBT, hereinafter referred to as a “heating component”) is electrically conductive adhesive or solder. Are joined directly. For this reason, the heat generated from the heat generating component is quickly diffused by the base plate 11 and the heat radiating fins 12.

  FIG. 3 is a diagram showing an internal structure of the quick charger 1A according to the present embodiment. In FIG. 3, the five panels 2a to 2e constituting the housing 2 are all removed, and the frame 13 and the charging unit 10 (10a-1 to 10a-3, 10b-1 to 10b-3, 10c- 1-10c-3) is visible. Note that FIG. 3A is a front view and corresponds to FIG. FIG. 3B is a left side view, which corresponds to FIG.

  The frame 13 has a shelf-like structure, and mainly includes a bottom plate 15, four support columns 16 extending in the vertical direction from the four corners of the bottom plate 15, and four shelf plates 17 a to 17 d provided inside the support column 16. And have. The bottom plate 15 and the shelf plates 17a to 17d are metal plates. In the quick charger 1A according to the present embodiment, the space in the housing 2 is divided into five layers adjacent in the vertical direction by the shelf plates 17a to 17d. In the following, the lowermost layer space is referred to as “lowermost layer space 18”, the uppermost layer space is referred to as “uppermost layer space 20”, and the three spaces between the lowermost layer space 18 and the uppermost layer space 20 are referred to as “middle layer spaces 19a to 19c”. ".

  As shown in FIG. 3, the quick charger 1 </ b> A includes a first duct 21 and a second duct 22. The first duct 21 and the second duct 22 extend in the vertical direction through the shelf plates 17a to 17d, and allow the lowermost layer space 18 and the uppermost layer space 20 to communicate with each other.

  The lowermost layer space 18 is connected to the outside by an intake port 6 provided in the right side panel 2b. Further, the uppermost layer space 20 is connected to the outside by an exhaust port 7 provided in the rear panel 2c and the left side panel 2d. On the other hand, in this embodiment, the slit is not formed in the position corresponding to the middle layer space 19a-19c of each panel 2a-2d. Therefore, in this embodiment, the middle layer spaces 19a to 19c are almost sealed.

  An exhaust fan (reference numeral 30 in FIG. 6) is provided in the vicinity of the exhaust port 7 provided in the uppermost layer space 20. When the exhaust fan is activated, the air in the uppermost layer space 20 is forcibly exhausted to the outside through the exhaust port 7.

  In the present embodiment, the intake port 6, the exhaust port 7 and the exhaust fan 30 serve as “air flow means”. As will be described in detail later, the air flow means plays a role of allowing air outside the housing 2 to flow in one direction from the lower ends of the first duct 21 and the second duct 22 toward the upper end.

  In the middle layer space 19a between the shelf board 17a and the shelf board 17b, the two charging units 10 (10a-1, 10a-2) are fixed to the first duct 21, and the charging unit 10 is installed to the second duct 22. (10a-3) is fixed. Similarly, in the middle space 19b, the two charging units 10 (10b-1, 10b-2) are fixed to the first duct 21, and the charging unit 10 (10b-3) is fixed to the second duct 22. ing. In the middle space 19c, the two charging units 10 (10c-1, 10c-2) are fixed to the first duct 21, and the charging unit 10 (10c-3) is fixed to the second duct 22. Yes.

  Three charging units arranged in the same space are connected in parallel to the external AC power supply 100. Specifically, the input terminals of the three charging units 10a-1 to 10a-3 arranged in the middle space 19a are connected to the a-phase input bus bar 23 and the b-phase input bus bar 24 by connection cables (not shown). . Similarly, the three charging units 10b-1 to 10b-3 arranged in the middle space 19b are connected to the a-phase input bus bar 23 and the c-phase input bus bar 25, and the three charging units 10b-1 to 10b-3 arranged in the middle layer space 19c. Charging units 10c-1 to 10c-3 have input terminals connected to b-phase input bus bar 24 and c-phase input bus bar 25. The output terminals of all the charging units 10a-1 to 10a-3, 10b-1 to 10b-3, 10c-1 to 10c-3 are connected to the pair of output bus bars 26 by connection cables (not shown).

  One end of each connection cable is fixed to the charging unit 10 by soldering or screwing, and the other end of each connection cable is fixed to the input bus bars 23 to 25 or the output bus bar 26 by screwing. Moreover, each connection cable has a connector part which can be attached or detached without a tool. Therefore, in the quick charger 1A, the charging unit 10 is replaced without removing or reattaching one end or the other end of the soldered or screwed connection cable from the charging unit 10 or the input / output bus bars 23 to 26. be able to.

  FIG. 4 is a plan view of the shelf board 17a, the charging units 10a-1 to 10a-3, the first duct 21, and the second duct 22 as viewed from directly above. As shown in the figure, each of the first duct 21 and the second duct 22 is a combination of four side plates 21a to 21d and 22a to 22d without any gaps. In the first duct 21, these four side plates are combined. Two (21b, 21d) which face each other among 21a-21d are comprised by the base plate 11 of charging unit 10a-1 and charging unit 10a-2. Further, in the second duct 22, one (22d) of the four side plates 22a to 22d is configured by the base plate 11 of the charging unit 10a-3. That is, the base plates 11 of the charging units 10 a-1, 10 a-2, and 10 a-3 also serve as the side plates 21 b and 21 d of the first duct 21 and the side plates 22 d of the second duct 22, respectively.

  In the shelf plate 17a, duct communication ports 27 and 28 are opened at positions corresponding to the first duct 21 and the second duct 22, respectively. As is clear from FIG. 4, since the radiating fins 12 of the charging units 10 a-1 to 10 a-3 extend straight in the vertical direction, the first duct 21 extends from the lowermost space 18 through the duct communication ports 27 and 28. The air that has flowed into the inside and the second duct 22 rises in a straight line without being blocked by the heat radiating fins 12.

  Similarly to the shelf plate 17a, duct communication ports 27 and 28 are also formed in the shelf plates 17b, 17c and 17d.

  FIG. 5 is a plan view of the first duct 21 and the second duct 22 in an exploded state. As shown in the figure, guides 40 and 41 each having a pair of protrusions provided along the long sides of the duct communication ports 27 and 28 are provided on the upper surface of the shelf 17a. Although not shown, guides 40 and 41 are also provided on the lower surface of the shelf board 17b.

  The assembly of the first duct 21 and the second duct 22 is performed in the following procedure. That is, after attaching the side plates 21c and 22c, the base plate 11 is slid along the guides 40 (41) provided on the upper surface of the shelf plate 17a and the lower surface of the shelf plate 17b, thereby charging units 10a-1 to 10a. -3 is arranged at a predetermined position, and finally, the side plates 21a, 22a, and 22b are attached, whereby the first duct 21 and the second duct 22 are completed.

  As described above, in the quick charger 1A according to the present embodiment, the attachment of the charging unit 10 and the assembly of the first duct 21 and the second duct 22 are performed at the same time, so that the manufacturing process can be simplified. Moreover, in the quick charger 1A according to the present embodiment, the charging unit 10 is a part of the first duct 21 and the second duct 22, so that the number of parts of the first duct 21 and the second duct 22 is reduced. You can also.

  FIG. 6 is a diagram schematically showing the air flow in the quick charger 1A. 7 and 10, the second duct 22 and the charging units 10 a-3, 10 b-3, and 10 c-3 fixed to the second duct 22 are shown for ease of explanation. Omitted.

  When the exhaust fan 30 operates, the air in the uppermost layer space 20 is forcibly exhausted to the outside through the exhaust port 7. As a result, the pressure in the uppermost layer space 20, the space in the first duct 21 (in the second duct 22), and the lowermost layer space 18 is reduced, and fresh air is taken into the lowermost layer space 18 through the intake port 6.

  The taken-in air rises in a straight line without stagnating in the first duct 21 (in the second duct 22). At this time, the radiation fins 12 of the respective charging units protruding into the first duct 21 (in the second duct 22) are air-cooled by the rising air.

  The air passing through the first duct 21 (second duct 22) and reaching the uppermost layer space 20 is finally exhausted from the exhaust port 7. Thereby, the charging units 10a-1 to 10a-3, 10b-1 to 10b-3, and 10c-1 to 10c-3 disposed around the first duct 21 and the second duct 22 are efficiently cooled. The

[Second Embodiment]
Then, the quick charger 1B which concerns on 2nd Embodiment of this invention is demonstrated. As shown in FIG. 7, the quick charger 1B is different from the quick charger 1A according to the first embodiment in that an intake fan 34 is provided in a duct communication port 27 formed in the shelf plate 17a. doing. The intake fan 34 is for sending air taken into the lowermost space 18 into the first duct 21. Regarding the second duct 22, an air intake fan is similarly provided at the duct communication port 28.

  When the volumes of the lowermost layer space 18 and the uppermost layer space 20 are large, it is conceivable that the pressure in these spaces cannot be sufficiently reduced only by operating the exhaust fan 30 provided in the uppermost layer space 20. If the pressure does not decrease sufficiently, the amount of fresh air from the outside taken in from the intake port 6 decreases, and the heat dissipation of the charging unit 10 decreases. According to the quick charger 1B according to the present embodiment, even in such a case, since the pressure in the lowermost layer space 18 is surely reduced, a sufficient amount of air is taken into the lowermost layer space 18 and the air Thus, the charging unit 10 can stably dissipate heat.

[Third Embodiment]
As shown in FIG. 8, the quick charger 1 </ b> C according to the third embodiment of the present invention has a point that a communication port 31 is further opened in the shelf plates 17 a to 17 c and a point that an intake fan 35 is provided. However, it differs from the quick charger 1A according to the first embodiment. The communication port 31 is formed in the shelf plates 17a to 17c except for the shelf plate 17d that divides the uppermost layer space 20 and the middle layer space 19c among the four shelf plates, and communicates and connects adjacent space layers. Note that a communication port 31 is also formed adjacent to the duct communication port 28 on the second duct 22 side (the same applies to fourth and fifth embodiments described later). The intake fan 35 is for sending fresh air taken into the lowermost space 18 to the first duct 21 and stirring the air in the middle space 19a-19c.

  In addition to the heat generating components (switching elements such as IGBTs), the charging unit 10 is mounted with a number of components (such as coils) that are preferably cooled. As shown in FIG. 4, a substrate on which a transformer T and a noise filter NF are mounted is attached to the side of the base plate 11 of each charging unit 10a-1 to 10a-3. Each of the transformer T and the noise filter NF includes a coil that is a heating element, and is configured separately from the base plate 11 on which a semiconductor element is mounted. That is, by attaching the transformer T and the noise filter NF separately from the components on the base plate 11, the external surface area in contact with the surrounding atmosphere is increased and the semiconductor element on the base plate 11 is isolated. With such a configuration, the heat generated from the transformer T and the noise filter NF can be efficiently radiated to the surroundings by stirring the atmosphere around the transformer T and the noise filter NF. For this reason, by forming the communication port 31 adjacent to the duct communication port 28, air flows from the communication port 31 into the middle layer spaces 19a to 19c, and the atmosphere around the transformer T and the noise filter NF is stirred. T and the noise filter NF are air-cooled. As described above, according to the quick charger 1C according to the present embodiment, the air in the middle layer spaces 19a to 19c can be agitated, so that the heated air stays around the coil and the like. Deterioration and the like can be prevented. In addition, as shown in FIG. 8, by attaching the intake fan 35 so as to straddle the duct communication port 27 and the communication port 31, one fan can perform the intake operation into the duct and the inner space 19 a to 19 c. It can also be used for air agitation.

[Fourth Embodiment]
As shown in FIG. 9, in the quick charger 1D according to the fourth embodiment of the present invention, slits as auxiliary exhaust ports 32b and 32c are formed at positions corresponding to the middle space 19b and the middle space 19c of the back panel 2c. In that respect, the quick charger 1C according to the third embodiment is different.

  According to the quick charger 1D according to the present embodiment, the air in the middle space 19a to 19c can be exhausted to change the inside / outside atmosphere, so that the charging unit 10 can further dissipate heat.

[Fifth Embodiment]
As shown in FIG. 10, the quick charger 1E according to the fifth embodiment of the present invention relates to the fourth embodiment in that auxiliary exhaust fans 33b and 33c are provided in the auxiliary exhaust ports 32b and 32c, respectively. It differs from the quick charger 1D. The auxiliary exhaust fans 33b and 33c are for forcibly exhausting the air in the middle layer space 19b and the middle layer space 19c.

  In the quick charger 1 </ b> B according to the present embodiment, the exhaust fan 30 and the two auxiliary exhaust fans 33 b and 33 c operate, so that more fresh air from the outside is taken into the lowermost layer space 18. A part of the taken-in air passes through the communication port 31 and reaches the middle space 19a to 19c, and is finally exhausted from the auxiliary exhaust port 32b or the auxiliary exhaust port 32c. Therefore, according to the quick charger 1E according to the present embodiment, heat can be prevented from being accumulated in the middle space 19a to 19c, and the charging unit can be operated more stably.

  As mentioned above, although preferred embodiment of the quick charger which concerns on this invention was described, this invention is not limited to said structure.

For example, although the quick chargers 1A to 1E according to the above-described embodiment accommodate nine charging units, the number of charging units can be arbitrarily changed according to the charging target.
As an example, when 15 charging units are accommodated and the output power is 50 [kW], (A) by adding one first duct and fixing two charging units to the first duct, Five charging units may be arranged in each middle space, or (B) two middle plates may be additionally provided to form five middle spaces, and three charging units may be arranged in each middle space. Good. When the method (A) is adopted, the depth of the quick charger is increased and the installation area is increased. On the other hand, when the method (B) is adopted, the quick charger is vertically long. Which method should be adopted may be determined according to the environment in which the quick charger is installed.

1A to 1E Quick charger 2 Housing 2a Front panel 2b Right side panel 2c Rear panel 2d Left side panel 2e Ceiling panel 2f Base part 3 Interface part 4 Charging cable 5 Charging gun 6 Inlet 7 Outlet 10 Charging unit 10a-1 -10a-3 Charging unit 10b-1 to 10b-3 Charging unit 10c-1 to 10c-3 Charging unit 11 Base plate 12 Radiating fin 13 Frame 15 Bottom plate 16 Post 17a to 17d Shelf plate 18 Lowermost layer space 19a to 19c Middle layer space 20 Uppermost layer space 21 First duct 21a-21d (first duct) side plate 22 Second duct 22a-22d (second duct) side plate 23 a-phase input bus bar 24 b-phase input bus bar 25 c-phase input bus bar 26 output bus bar 27 Duct communication port 28 Duct communication port 30 Exhaust fan 31 Communication port 3 b, 32c Auxiliary exhaust port 33b, 33c Auxiliary exhaust fan 34 Intake fan 35 Intake fan 40 Guide 41 Guide 100 External AC power supply 101 Leakage breaker 102A, 102B AC / DC converter 103 High power charging units 103a-103c Charging unit 104 Converter 105 Inverter 106 High Frequency Insulation Transformer 107 Rectifier 108 Charging Connector 200 Car Battery NF Noise Filter T Transformer

Claims (5)

A quick charger that charges a battery with the sum of electric power output from a plurality of charging units,
A box-shaped housing extending in the vertical direction;
At least one duct extending longitudinally within the housing;
Air flow means for flowing the air outside the housing in one direction from the lower end to the upper end of the duct;
Each of the plurality of charging units is detachably attached to the housing,
A part of each charging unit constitutes one wall surface of the duct, protrudes into the duct, and is air-cooled by the air flowing through the duct. Each of the plurality of charging units is
A base plate;
A heat generating component joined to the surface of the base plate;
A plurality of radiating fins protruding from the back surface of the base plate;
The quick charger according to claim 1, wherein the heat radiation fin protrudes into the duct. The duct is composed of four side plates constituting a pair of opposing wall surfaces.
The quick charger according to claim 2, wherein at least one of the four side plates is the base plate of the charging unit. Further comprising a shelf that divides the space in the housing into a plurality of vertically adjacent space layers,
A pair of guides having a width corresponding to the thickness of the base plate of the charging unit is provided on the surface of the shelf board,
The quick charger according to claim 2 or 3, wherein the charging unit is attached by inserting the base plate into the pair of guides in a state where the heat radiating fins are directed inward of the duct. The charging unit converts AC power input from the outside via an input bus bar into predetermined DC power, and supplies the DC power to the battery via an output bus bar.
The connection between the charging unit and the input bus bar and the connection between the charging unit and the output bus bar are made by a tool-free detachable connector. Quick charger.

Images