CN218519541U - Heat dissipation system and charging pile for electric vehicle charging pile - Google Patents

Abstract

The utility model discloses an electric automobile fills electric pile cooling system, including the heat dissipation box body, the inside first cavity that is provided with of heat dissipation box body, first cavity is used for placing the module of charging, still includes second cavity and third cavity, the second cavity sets up under the first cavity, first cavity with the second cavity is through two mutual communicating regions of metal sheet partition become, first cavity set up in the third cavity, the third cavity with the second cavity intercommunication, the second cavity with the third cavity is used for placing the refrigeration liquid. Through the below setting of first cavity the second cavity will first cavity sets up in the third cavity, and place the refrigerating fluid in second cavity and the first cavity and dispel the heat the cooling to the module that charges in the first cavity, it is effectual to dispel the heat the cooling.

Description

Heat dissipation system and charging pile for electric vehicle charging pile

technical field

The utility model relates to the technical field of refrigeration, in particular to a cooling system for a charging pile of an electric vehicle and a charging pile.

Background technique

With the continuous development of electric vehicle technology, electric vehicles are becoming more and more popular in daily travel, and due to their environmental protection features, electric vehicles are also increasingly supported by consumers. With the continuous development of the electric vehicle industry, in order to meet the needs of fast charging, manufacturers of electric vehicles and charging piles continue to increase the charging speed of electric vehicles. However, as the charging speed of electric vehicles increases, the charging current and voltage will also increase accordingly. A substantial increase, which in turn leads to an increase in the power of the charging pile inductance module. During the charging process, the charging modules such as the inductance module and the power module of the charging pile will quickly and massively generate heat. The traditional way of dissipating heat from the heating components of charging piles through forced air cooling has been difficult to meet the increasing power demand of charging piles. The industry urgently needs new heat dissipation methods to meet the increasing power density requirements of charging piles.

In addition, the existing outdoor charging pile adopts air-cooled heat dissipation. Its main structure is to dissipate heat in the way that the charging module flows forward and the charging module emits air. Such a heat dissipation structure will inevitably have water vapor and fine dust entering the charging module. Over time, dust will accumulate on the circuit board, leading to an increase in the failure rate of the charging module and severely reducing the service life of the charging module.

Utility model content

In order to overcome the above disadvantages, the purpose of this utility model is to provide a heat dissipation system and a charging pile for an electric vehicle charging pile. The electric vehicle charging pile heat dissipation system uses coolant to cool the charging pile, which can prevent dust, corrosive gas, moisture, etc. from entering the cabinet to contaminate precision components, and has a better heat dissipation effect.

In order to achieve the above purpose, the technical solution adopted by the utility model is: an electric vehicle charging pile heat dissipation system, including a heat dissipation box, and a first cavity is arranged inside the heat dissipation box, and the first cavity is used to place The charging module also includes a second cavity and a third cavity, the second cavity is arranged directly below the first cavity, and the first cavity and the second cavity are connected through a metal plate The first cavity is arranged in the third cavity, the third cavity communicates with the second cavity, and the second cavity communicates with the second cavity. The third cavity is used for placing refrigerant liquid. Through the arrangement of the second cavity, the cooling liquid is placed in the second cavity, and the cooling liquid cools the metal plate and then dissipates heat to the charging module placed in the first cavity. At the same time, through the setting of the third cavity, the temperature of the side wall of the first cavity is lowered, so that the first cavity is in a low-temperature environment, thereby improving the cooling effect on the charging module. Therefore, by providing the second cavity below the first cavity, the first cavity is provided in the third cavity, and between the second cavity and the first cavity Refrigerant liquid is placed in the first cavity to dissipate heat and cool down the charging module in the first cavity, and the heat dissipation and cooling effect is good.

The utility model is further configured as follows: the first cavity is a cuboid, the side wall of the first cavity is a first side wall, the third cavity is a cuboid, and the side wall of the third cavity is The third side wall, there is a gap between the first side wall of the first cavity and the third side wall of the third cavity. Through the arrangement of leaving a gap between the first side wall of the first cavity and the third side wall of the third cavity, when the refrigerant liquid is added into the third cavity, the refrigerant liquid simultaneously acts on the first cavity The temperature of the first side walls located in different directions of the cavity is lowered, which further improves the cooling effect of the cooling liquid in the third cavity on the charging module in the first cavity.

The utility model is further configured to: further include a refrigeration device, the refrigeration device is used to cool down the refrigerant, the third side wall is provided with a third liquid inlet hole and a third liquid outlet hole, and the third liquid inlet hole The liquid hole is connected to the liquid outlet of the refrigeration device through a liquid inlet pipe, and the third liquid outlet hole is connected to the liquid inlet of the refrigeration device through a liquid outlet pipe. Refrigerant liquid circulates between the third cavity and the refrigeration device.

The utility model is further configured as follows: the third liquid inlet hole is located at one end of the lower part of the third side wall, the third liquid outlet hole is located on the third side wall opposite to the third liquid inlet hole, and The third liquid outlet hole is located at the upper end of the third side wall. The refrigerant liquid enters the third cavity through the third liquid inlet hole, and since the third liquid inlet hole is located at the lower part of the third side wall, and the third liquid outlet hole is located at the upper part of the third side wall, it can ensure The refrigerant liquid fills the entire third cavity, preventing the refrigerant liquid from entering the third cavity and flowing out from the third liquid outlet hole before sufficiently cooling the charging module. The third liquid inlet hole and the third liquid outlet hole are arranged on the two third side walls opposite to the third cavity, so that the third liquid inlet hole and the third liquid outlet hole The distance between them is maximized to increase the cooling effect of the charging module.

The utility model is further configured as follows: the side wall of the second cavity is a second side wall, and the second side wall is provided with a second liquid inlet hole and a second liquid outlet hole, and the second liquid inlet hole The second liquid outlet hole is arranged near the third liquid inlet hole, and the second liquid outlet hole is arranged away from the second liquid inlet hole. By arranging the second liquid inlet hole close to the third liquid inlet hole, the temperature of the refrigerant liquid entering the third cavity through the third liquid inlet hole is low, and a part of the refrigerant liquid enters the third cavity in the third cavity. The first side wall of the cavity is cooled, and another part of the refrigerated liquid directly enters the second cavity to cool the bottom of the first cavity, and by setting the second liquid outlet hole away from the second liquid inlet hole, so that the cooling liquid can fully cool the bottom of the first cavity and then flow out from the second liquid outlet hole into the refrigeration device.

The utility model is further configured as follows: the outer surface of the heat dissipation box is provided with a thermal insulation layer. Through the design of the thermal insulation layer, the heat dissipation box is insulated, preventing the cooling liquid from cooling the device outside the heat dissipation box, and improving the utilization rate of the cooling liquid.

An electric vehicle charging pile includes the heat dissipation system for the electric vehicle charging pile as described above.

The utility model is further configured as follows: the charging module includes a circuit board, a transformer and a power semiconductor, the power semiconductor and the transformer are respectively connected to the circuit board, and the power semiconductor is attached and installed in the first cavity The metal plate at the bottom enables the metal plate to sufficiently dissipate heat from the power semiconductor, and the side of the power semiconductor is in contact with the third side wall. The power semiconductor is effectively dissipated through the metal plate, which effectively reduces the overall temperature of the charging module, and realizes the effective heat dissipation of the charging module and the overall heat dissipation of the charging pile. And the temperature of the side wall of the first cavity is lowered through the third cavity, so that the first cavity is in a low-temperature environment, thereby improving the heat dissipation effect of the charging module.

The utility model has the following beneficial effects:

1) by providing the second cavity below the first cavity, the first cavity is placed in the third cavity, and the second cavity and the first cavity Refrigerant liquid is placed in the first cavity to dissipate heat and cool down the charging module in the first cavity, and the heat dissipation and cooling effect is good.

2) When refrigerant liquid is added into the third cavity, the refrigerant liquid simultaneously cools down the first side walls of the first cavity located in different directions, which further improves the effect of the refrigerant liquid in the third cavity on the first side wall. The cooling effect of the charging module in the cavity.

Description of drawings

Fig. 1 is a perspective view of a charging pile according to an embodiment of the present invention;

Fig. 2 is a perspective view of a heat dissipation box according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a heat dissipation box according to an embodiment of the present invention.

In the figure: 1, the first cavity; 11, the first side wall; 12, the metal plate; 2, the second cavity; 21, the second side wall; 211, the second liquid inlet hole; 3, the third cavity ; 31, the third side wall; 311, the third liquid inlet hole; 4, the heat dissipation box; 41, the connecting plate; 411, the through hole; 42, the liquid inlet pipe; 43, the liquid outlet pipe; 5, the charging module; 51 , semiconductor; 52, transformer; 53, circuit board; 6, fixed base; 7, charging pile body; 71, wire; 72, charging gun; 73, gun base.

Detailed ways

The preferred embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and characteristics of the utility model can be more easily understood by those skilled in the art, so that the protection scope of the utility model can be defined more clearly .

Referring to Figure 1, a charging pile for electric vehicles includes a fixed base 6, which is arranged in parallel on the top of the ground, and a charging pile body 7 is fixedly installed on the top of the fixed base 6, and the charging pile body 7 is provided with a charging gun 72 , and the charging gun 72 is connected to the charging pile body 7 through a wire 71 . The charging pile body 7 is provided with a gun base 73 for placing the charging gun 72 .

Referring to accompanying drawings 2 and 3, in some embodiments, the electric vehicle charging pile heat dissipation system includes a heat dissipation box 4, and the heat dissipation box 4 is provided with a connecting plate 41, and the connecting plate 41 is provided with Through hole 411 , the heat dissipation box body 4 is fixed in the charging pile body 7 through the connecting plate 41 . The charging module 5 of the electric vehicle charging pile is placed in the heat dissipation box 4 . It also includes a refrigeration device connected to the heat dissipation box 4 , the refrigeration device is used to cool down the cooling liquid in the heat dissipation box 4 , and then to dissipate heat from the charging module 5 .

In some embodiments, the heat dissipation box 4 is provided with a first cavity 1 inside, and the first cavity 1 is used to place the charging module 5, and also includes a second cavity 2 and a third cavity 3, so The second cavity 2 is arranged directly below the first cavity 1, and the first cavity 1 and the second cavity 2 are divided into two mutually disconnected regions by a metal plate 12, The charging module 5 is in contact with the metal plate 12, the first cavity 1 is disposed in the third cavity 3, the third cavity 3 is connected to the second cavity 2, and the The second cavity 2 and the third cavity 3 are used to place refrigerant liquid. The power range of common DC charging piles on the market is 30KW, 60KW and 120KW, and the efficiency is generally around 95%. Then, 5% of them will be converted into heat loss, and the heat loss is 1.5KW, 3KW and 6KW. If the heat is not dissipated in time, the aging of the equipment will be accelerated, and it may also cause a great safety accident. Through the setting of the second cavity 2, the refrigerant liquid is placed in the second cavity 2, and the refrigerant liquid cools the metal plate 12 and then dissipates heat to the charging module 5 placed in the first cavity 1. At the same time, through the setting of the second cavity 2 , the temperature of the first side wall 11 of the first cavity 1 is lowered, so that the first cavity 1 is in a low-temperature environment, thereby improving the cooling effect on the charging module 5 . Therefore, by arranging the second cavity 2 below the first cavity 1, the first cavity 1 is arranged in the third cavity 3, and in the second cavity 2 Cooling liquid is placed in the first cavity 1 to dissipate heat and cool down the charging module 5 in the first cavity 1, and the heat dissipation and cooling effect is good.

In some embodiments, the first cavity 1 is a cuboid, the side wall of the first cavity 1 is the first side wall 11, the third cavity 3 is also a cuboid, and the third cavity The side wall of 3 is the third side wall 31, the first cavity 1 is set in the third cavity 3, and the first side wall 11 of the first cavity 1 and the third cavity There is a gap between the third side walls 31 of 3. By arranging the first cavity 1 in the third cavity 3, when the third cavity 3 is filled with refrigerant liquid, the refrigerant liquid simultaneously acts on the first chambers of the first cavity 1 located in different directions. The cooling of the side wall 11 further improves the cooling effect of the cooling fluid in the third cavity 3 on the charging module 5 in the first cavity 1 .

In some embodiments, the third side wall 31 is provided with a third liquid inlet hole 311 and a third liquid outlet hole, and the third liquid inlet hole 311 passes through the liquid inlet pipe 42 and the liquid outlet of the refrigeration device. The third liquid outlet is connected to the liquid inlet of the refrigeration device through a liquid outlet pipe 43 . The refrigerating liquid circulates between the third cavity 3 and the refrigerating device, and when the refrigerating liquid radiates heat and cools down the charging module 5 in the first cavity 1 in the third cavity 3, the temperature of the refrigerating liquid rises. High, then the refrigerating liquid flows out of the third cavity 3 through the third liquid outlet hole, and then enters the refrigerating device through the liquid outlet pipe 43 and the liquid inlet of the refrigerating device, and the refrigerating device cools the refrigerating device The cooling liquid is cooled and refrigerated, and the cooled cooling liquid enters the third cavity 3 through the liquid inlet pipe 42 and the third liquid inlet hole 311 to cool and dissipate the charging module 5, and so on.

In some embodiments, the third liquid inlet hole 311 is located at the lower end of the third side wall 31 , and the third liquid outlet hole is located at the third side wall 31 opposite to the third liquid inlet hole 311 and located at the end of the third side wall 31 close to the upper part. Refrigerant liquid enters the third cavity 3 through the third liquid inlet hole 311. Since the third liquid inlet hole 311 is located at the lower part of the side wall of the third cavity 3, the third liquid outlet hole is located at the third cavity. The upper part of the side wall of the cavity 3 can ensure that the refrigerant liquid is filled in the entire third cavity 3, preventing the refrigerant liquid from entering the third cavity 3 and leaving the charging module 5 without sufficiently cooling down the temperature. Three outlet holes flow out. The third liquid inlet hole 311 and the third liquid outlet hole are arranged on the two third side walls 31 opposite to the third cavity 3, so that the third liquid inlet hole 311 and the third liquid outlet hole The distance between the three liquid outlet holes is maximized to increase the effect of cooling and cooling the charging module 5 .

In some embodiments, the second liquid inlet hole 211 and the second liquid outlet hole are provided on the second side wall 21 of the second cavity 2, and the second liquid inlet hole is arranged near the third inlet hole. At the liquid hole 311 , the second liquid outlet hole is disposed away from the second liquid inlet hole 211 . By arranging the second liquid inlet hole 211 close to the third liquid inlet hole 311, the temperature of the refrigerant liquid that has just entered the third cavity 3 through the third liquid inlet hole 311 is low, and a part of the refrigerant liquid enters the third cavity 3. The cavity 3 cools down the first side wall 11 of the first cavity 1, and another part of the refrigerant liquid directly enters the second cavity 2 to cool down the bottom of the first cavity 1, and through the second liquid outlet hole It is arranged at a place away from the second liquid inlet hole 211 so that the refrigerant liquid can fully cool down the bottom of the first cavity 1 and then flow out from the second liquid outlet hole into the refrigeration device.

In some embodiments, the heat dissipation box 4 includes an upper cover, and the third side wall 31 of the upper cover is connected. An insulating layer is provided on the outer surface of the heat dissipation box body 4 . Through the design of the thermal insulation layer, the heat dissipation box 4 is kept warm, preventing the cooling liquid from cooling the device outside the heat dissipation box 4, and improving the utilization rate of the cooling liquid.

In some embodiments, the charging module 5 includes a circuit board 53, a transformer 52 and a power semiconductor 51, the power semiconductor 51 and the transformer 52 are respectively connected to the circuit board 53, and the power semiconductor 51 is mounted on the bottom of the first cavity 1 on the metal plate 12 so that the metal plate 12 can fully dissipate heat from the power semiconductor 51 . A side surface of the power semiconductor 51 abuts against the third side wall 31 . The power semiconductor 51 is specifically the main heating element of the charging module 5 , and the metal plate 12 effectively dissipates heat from the power semiconductor 51 , effectively reducing the overall temperature of the charging module 5 and realizing effective heat dissipation of the charging module 5 . Moreover, the temperature of the side wall of the first cavity 1 is lowered through the third cavity 3 , so that the first cavity 1 is in a low-temperature environment, thereby improving the heat dissipation effect of the charging module 5 .

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right" etc. The orientation or positional relationship is only for the convenience of describing the utility model and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a reference to the utility model. limits.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them.

The above embodiments are only to illustrate the technical conception and characteristics of the present utility model. Equivalent changes or modifications made by the spirit of the utility model shall fall within the protection scope of the utility model.

Claims (8)

1. An electric vehicle charging pile heat dissipation system, comprising a heat dissipation box (4), a first cavity (1) is provided inside the heat dissipation box (4), and the first cavity (1) is used to place The charging module (5) is characterized in that it also includes a second cavity (2) and a third cavity (3), the second cavity (2) is arranged in front of the first cavity (1) Below, the first cavity (1) and the second cavity (2) are separated by a metal plate (12) into two areas that do not communicate with each other, and the first cavity (1) is arranged in In the third cavity (3), the third cavity (3) communicates with the second cavity (2), and the second cavity (2) and the third cavity (3 ) is used to place refrigerant. 2. A heat dissipation system for electric vehicle charging piles according to claim 1, characterized in that, the first cavity (1) is a cuboid, and the side wall of the first cavity (1) is the first side wall (11), the third cavity (3) is a cuboid, the side wall of the third cavity (3) is the third side wall (31), the first cavity (1) of the first There is a gap between the side wall (11) and the third side wall (31) of the third cavity (3). 3. A heat dissipation system for an electric vehicle charging pile according to claim 2, characterized in that it further comprises a refrigeration device, the refrigeration device is used to cool down the refrigerant, and the third side wall (31) is provided with There are a third liquid inlet hole (311) and a third liquid outlet hole, the third liquid inlet hole (311) is connected with the liquid outlet of the refrigeration device through a liquid inlet pipe (42), and the third liquid outlet The hole is connected with the liquid inlet of the refrigeration device through a liquid outlet pipe (43). 4. A heat dissipation system for an electric vehicle charging pile according to claim 3, characterized in that, the third liquid inlet hole (311) is located at one end of the lower part of the third side wall (31), and the first The three liquid outlet holes are located on the third side wall (31) opposite to the third liquid inlet hole (311), and the third liquid outlet hole is located at the upper end of the third side wall (31). 5. A heat dissipation system for an electric vehicle charging pile according to claim 4, characterized in that, the side wall of the second cavity (2) is a second side wall (21), and the second side wall ( 21) is provided with a second liquid inlet hole (211) and a second liquid outlet hole, the second liquid inlet hole (211) is arranged near the third liquid inlet hole (311), and the second liquid outlet hole The liquid hole is arranged away from the second liquid inlet hole (211). 6 . The heat dissipation system for an electric vehicle charging pile according to claim 5 , wherein an insulating layer is provided on the outer surface of the heat dissipation box ( 4 ). 7. An electric vehicle charging pile, characterized in that it comprises the electric vehicle charging pile cooling system according to claim 4. 8. A charging pile for electric vehicles according to claim 7, characterized in that, the charging module (5) includes a circuit board (53), a transformer (52) and a power semiconductor (51), and the power semiconductor ( 51) and the transformer (52) are respectively connected to the circuit board (53), and the power semiconductor (51) is attached and installed on the metal plate (12) at the bottom of the first cavity (1), so that The metal plate (12) can sufficiently dissipate heat from the power semiconductor (51), and the side surface of the power semiconductor (51) is in contact with the third side wall (31).

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