CN221529701U

CN221529701U - Capacitor and power unit

Info

Publication number: CN221529701U
Application number: CN202322731328.8U
Authority: CN
Inventors: 李振升; 黄彭发; 汪令祥; 吴玉杨; 左占国; 魏世民
Original assignee: Sungrow Power Supply Co Ltd
Current assignee: Sungrow Power Supply Co Ltd
Priority date: 2023-10-11
Filing date: 2023-10-11
Publication date: 2024-08-13
Anticipated expiration: 2033-10-11

Abstract

The present application discloses a capacitor and a power unit, belonging to the technical field of capacitors. The capacitor includes: a housing; an integrated capacitor pool, which is installed in the housing and includes a plurality of capacitor cores; a conductive element, which is electrically connected to the plurality of capacitor cores; a plurality of input terminals, which are arranged outside the housing and are used to be electrically connected to the module bus of the power module, and the plurality of input terminals are electrically connected to the conductive element. Through the arrangement of the above-mentioned conductive element and the plurality of input terminals, the power module is directly electrically connected to the capacitor through the module bus, and the composite busbar structure of the existing integrated capacitor pool is omitted, which saves volume space, is beneficial to the overall layout, reduces the overall weight, and facilitates the later maintenance work, and reduces the difficulty of assembling the capacitor, thereby saving material costs and processing costs.

Description

Capacitor and power unit

Technical Field

The application belongs to the technical field of capacitors, and particularly relates to a capacitor and a power unit.

Background

For the existing power unit, along with the increase of power, the demand on the supporting capacitor is gradually increased, so that the overall structure of the power unit is influenced, the overall size, the overall cost, the overall heat dissipation and the like of the power unit are further influenced, in the related technology, the supporting capacitor in the power unit is a single small capacitor core, the supporting capacitor is supported and installed through a structural support piece, and the capacitor cores are integrated together through the increase of a composite busbar and are electrically connected with a power module.

However, the above scheme has the following drawbacks in practical application: firstly, a wasted space gap always exists between small capacitor cores, the size is extremely large, the space requirement is high, and the overall arrangement is very unfavorable; secondly, a large capacitance pool formed by integrating small capacitance cores is extremely heavy in total weight, and is extremely inconvenient to maintain in the later period; thirdly, the composite busbar has extremely large size and extremely high cost, and the whole machine is high in cost.

Disclosure of utility model

The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides the capacitor and the power unit, which omits the composite busbar structure of the existing integrated capacitor pool, is beneficial to the overall layout, reduces the overall weight, facilitates the later maintenance work, reduces the assembly difficulty, and saves the material cost and the processing cost.

In a first aspect, the present application provides a capacitor comprising:

A housing;

the integrated capacitor pool is arranged in the shell and comprises a plurality of capacitor cores;

A conductive element electrically connected to the plurality of capacitive cores;

The input terminals are arranged outside the shell and are used for being electrically connected with a module bus of the power module, and the input terminals are electrically connected with the conductive element.

According to the capacitor, through the arrangement of the conductive element and the plurality of input terminals, the power module is directly and electrically connected with the capacitor through the module bus, the composite bus structure of the existing integrated capacitor pool is omitted, the volume space is saved, the overall weight is reduced while the overall layout is facilitated, the later maintenance work is facilitated, and the assembly difficulty of the capacitor is reduced, so that the material cost and the processing cost are saved.

According to one embodiment of the application, the plurality of input terminals includes at least one positive input terminal, at least one negative input terminal, and at least one N-pole input terminal.

According to one embodiment of the application, the capacitor further comprises:

And the parallel terminals are arranged outside the shell and are used for being electrically connected with the parallel terminals of another capacitor, and the parallel terminals are electrically connected with the conductive element.

And the temperature detection connecting part is arranged outside the shell and is used for installing a temperature sensor.

A heat radiating fin arranged at a side wall of the housing;

The air guide cover is arranged on the radiating fins.

According to one embodiment of the application, a heat conducting material is arranged between the radiating fins and the shell.

The wind collecting cavity is communicated with the wind scooper;

The fan is communicated with the wind collecting cavity and used for driving air in the wind scooper to flow.

According to one embodiment of the application, the housing is provided with a plurality of ventilation openings.

According to one embodiment of the application, the vent is provided with heat dissipating fins.

the air collecting cavity is communicated with the ventilation opening;

And the fan is communicated with the air collecting cavity and used for driving air at the radiating fins to flow.

the air collecting cavity is communicated with the ventilation opening;

the fan is communicated with the air collecting cavity and used for driving air in the shell to flow.

The runner structure is attached to the side wall of the shell and used for circulating heat exchange media.

and the flow passage structure is arranged in the shell and is used for circulating heat exchange media.

According to one embodiment of the application, the flow channel structure comprises a plurality of flow channel structures which are arranged in a separated manner, and the plurality of flow channel structures are connected in parallel; and/or the flow channel structure comprises a plurality of flow channel structures which are arranged in a separated way, and the plurality of flow channel structures are connected in series.

According to one embodiment of the application, the housing has a water inlet and a water outlet for circulating a heat exchange medium.

In a second aspect, the present application provides a power unit comprising:

A capacitor as in any one of the above;

The power module is provided with a module bus, and the module bus is electrically connected with the input terminal of the capacitor.

According to the power unit disclosed by the application, through the arrangement of the capacitor, the composite busbar structure of the existing integrated capacitor pool is omitted, the volume space is saved, the overall weight is reduced while the overall layout is facilitated, the later maintenance work is facilitated, the assembly difficulty of the capacitor is reduced, the material cost and the processing cost are saved, the integration level of the whole power unit is improved, and the power density of the whole power unit is effectively increased.

According to one embodiment of the application, the capacitor comprises a plurality of parallel terminals arranged side by side, the plurality of parallel terminals being arranged in a first plane of the capacitor, the plurality of first planes of the plurality of capacitors being coplanar, further comprising:

and the direct current busbar is electrically connected with a plurality of parallel terminals of one capacitor and a plurality of parallel terminals of the other capacitors.

According to an embodiment of the present application, the capacitor includes a plurality of parallel terminals arranged side by side, the plurality of parallel terminals being arranged at a side wall of the capacitor, further including:

And the direct current busbar is electrically connected with a plurality of parallel connection terminals of one capacitor and a plurality of parallel connection terminals of the adjacent capacitor.

And the plurality of conductors are respectively and electrically connected with the plurality of parallel connection terminals of one capacitor and the plurality of parallel connection terminals of the adjacent capacitor.

According to one embodiment of the present application, a plurality of the capacitors are electrically connected to a plurality of the power modules, respectively; and/or the capacitor is electrically connected with a plurality of the power modules; and/or a plurality of the capacitors are electrically connected with the power module.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of a capacitor according to an embodiment of the present application;

FIG. 2 is a second schematic diagram of a capacitor according to an embodiment of the present application;

FIG. 3 is a third schematic diagram of a capacitor according to an embodiment of the present application;

FIG. 4 is one of the top views of a capacitor provided by an embodiment of the present application;

FIG. 5 is a second top view of a capacitor according to an embodiment of the present application;

FIG. 6 is a third top view of a capacitor provided by an embodiment of the present application;

FIG. 7 is one of the side views of a capacitor provided by an embodiment of the present application;

FIG. 8 is a top view of a capacitor provided by an embodiment of the present application;

FIG. 9 is a fifth top view of a capacitor provided by an embodiment of the present application;

FIG. 10 is a schematic diagram of a capacitor according to an embodiment of the present application;

FIG. 11 is a second side view of a capacitor provided by an embodiment of the present application;

FIG. 12 is a schematic diagram of a capacitor according to an embodiment of the present application;

FIG. 13 is a top view of a capacitor provided by an embodiment of the present application;

FIG. 14 is a schematic view of a flow path of a heat exchange medium of a capacitor according to an embodiment of the present application;

FIG. 15 is a schematic diagram of a capacitor according to an embodiment of the present application;

FIG. 16 is a schematic diagram of a power unit according to an embodiment of the present application;

FIG. 17 is a second schematic diagram of a power unit according to an embodiment of the present application;

FIG. 18 is one of the assembled schematic views of a plurality of capacitors provided in an embodiment of the present application;

FIG. 19 is a second schematic diagram of an assembly of a plurality of capacitors according to an embodiment of the present application;

fig. 20 is a third schematic diagram of the assembly of a plurality of capacitors according to an embodiment of the present application.

Reference numerals:

a power unit 10;

a capacitor 100, a conductive element 130, a temperature detection connection 160;

The shell 110, the ventilation opening 111, the water inlet 112, the water outlet 113 and the flanging 114;

an integrated capacitor cell 120, a capacitor core 121;

Input terminal 140, positive input terminal 141, negative input terminal 142, n-pole input terminal 143;

Parallel terminal 150, positive parallel terminal 151, negative parallel terminal 152, n-pole parallel terminal 153;

The heat-conducting material comprises heat-radiating fins 170, a wind scooper 180, a heat-conducting material 190, a water-wind heat exchanger 210, a wind collecting cavity 220 and a fan 230; a flow channel structure 240, a flow channel water inlet 241, a flow channel water outlet 242;

Power module 300, module bus 310, dc bus 400, electrical conductor 500, ntc temperature line 600.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

The application discloses a capacitor 100.

A capacitor 100 according to an embodiment of the present application is described below with reference to fig. 1 to 20.

In some embodiments, as shown in fig. 1, capacitor 100 includes: a housing 110, an integrated capacitive cell 120, a conductive element 130, and a plurality of input terminals 140.

The housing 110 may be used to mount the integrated capacitive cell 120, the conductive element 130, and the plurality of input terminals 140 as a unitary frame, and the housing 110 may be made of a plastic material, including but not limited to PVC (Polyvinyl chloride ), PI (Polyimide), PS (Polystyrene ), PC (Polycarbonate), PA (Polyamide ), etc., or a metal material, including but not limited to aluminum alloy, aluminum magnesium alloy, or stainless steel, etc., such as, in some embodiments, the housing 110 is made of a plastic material.

As shown in fig. 1-2, the housing 110 may have a flange 114, and the flange 114 may be adapted to be fixedly connected to other components, and in particular, the flange 114 may be threadably or otherwise fixedly connected to other components.

The integrated capacitor cell 120 is installed in the housing 110, and the integrated capacitor cell 120 includes a plurality of capacitor cores 121; the conductive element 130 is electrically connected to the plurality of capacitive cores 121.

Where the plurality represents 2 or more, for example, in some embodiments, the integrated capacitive pool 120 includes 50 capacitive cores 121.

As shown in fig. 1, the plurality of capacitor cores 121 may be divided into a plurality of columns, and the plurality of capacitor cores 121 in each column may be connected in series, and the plurality of columns may be connected to the conductive element 130 in parallel.

The plurality of input terminals 140 are disposed outside the housing 110, the plurality of input terminals 140 are electrically connected to the module bus 310 of the power module 300, and the plurality of input terminals 140 are electrically connected to the conductive elements 130.

Wherein a plurality represents 2 or more, for example, in some embodiments, as shown in fig. 1-2, 6 input terminals 140 are disposed outside of the housing 110.

The conductive element 130 may be a conductive strip or wire, specifically, the plurality of capacitive cores 121 may also be electrically connected to the plurality of input terminals 140 through a conductive strip, or the plurality of capacitive cores 121 may also be electrically connected to the plurality of input terminals 140 through a wire, for example, in some embodiments, as shown in fig. 1, the conductive element 130 may be a conductive strip, where the plurality of capacitive cores 121 may be matingly connected to a single input terminal 140, or a single capacitive core 121 may be matingly connected to a single input terminal 140, without limitation herein.

In practical implementation, as shown in fig. 1 and 2, after the capacitor 100 and the power module 300 are assembled, the plurality of capacitor cores 121 are integrated into the integrated capacitor pool 120, the integrated capacitor pool 120 may be installed in the housing 110, the integrated capacitor pool 120 may lead out the plurality of input terminals 140, specifically, the conductive element 130 may be disposed in the housing 110, the conductive element 130 may be electrically connected with the plurality of capacitor cores 121, that is, the conductive element 130 may be electrically connected with the integrated capacitor pool 120, and the conductive element 130 may be electrically connected with the plurality of led out input terminals 140, and the power module 300 may be directly electrically connected with the plurality of input terminals 140 through the module bus 310, so as to implement electrical connection between the power module 300 and the capacitor 100.

It should be noted that, the number of the input terminals 140 when the single power module 300 is electrically connected to the single capacitor 100 is not limited, and may be increased or decreased according to actual needs, and the relative positions of the capacitor 100 and the power module 300 may be in various directions, such as front and back, up and down, or left and right, where the relative positions of the capacitor 100 and the power module 300 are not limited, for example, in some embodiments, as shown in fig. 16-17.

According to the capacitor 100 provided by the embodiment of the application, through the arrangement of the conductive element 130 and the plurality of input terminals 140, the power module 300 is directly and electrically connected with the capacitor 100 through the module bus 310, the composite busbar structure of the existing integrated capacitor cell is omitted, the volume space is saved, the overall layout is facilitated, the overall weight is reduced, the later maintenance work is facilitated, and the assembly difficulty of the capacitor 100 is reduced, so that the material cost and the processing cost are saved.

In some embodiments, as shown in fig. 1, the plurality of input terminals 140 may include at least one positive input terminal 141, at least one negative input terminal 142, and at least one N-pole input terminal 143.

For example, in some embodiments, as shown in fig. 1, the plurality of input terminals 140 includes two positive input terminals 141, two negative input terminals 142, and two N-pole input terminals 143.

In this embodiment, as shown in fig. 1, the plurality of capacitor cores 121 may be divided into a plurality of columns, the plurality of capacitor cores 121 in each column may be connected in series, the plurality of columns may be connected to the conductive element 130 in parallel directly with each other, at least one positive input terminal 141 may be electrically connected to the conductive element 130, at least one negative input terminal 142 may be electrically connected to the conductive element 130, at least one N-electrode input terminal 143 may be electrically connected to the conductive element 130, and the module bus 310 of the power module 300 may be electrically connected to each of the at least one positive input terminal 141, the at least one negative input terminal 142, and the at least one N-electrode input terminal 143.

According to the capacitor 100 provided by the embodiment of the application, through the arrangement of the at least one positive electrode input terminal 141, the at least one negative electrode input terminal 142 and the at least one N electrode input terminal 143, the electrical performance of the capacitor 100 is improved, the ripple is reduced, and the assembly precision requirement of the capacitor 100 is lowered, so that the comprehensive cost of the capacitor 100 is lowered.

In some embodiments, as shown in fig. 1-2, capacitor 100 may further comprise: a plurality of shunt terminals 150.

The plurality of shunt terminals 150 may be disposed outside the case 110, the plurality of shunt terminals 150 may be used to electrically connect with the plurality of shunt terminals 150 of another capacitor 100, and the plurality of shunt terminals 150 may be electrically connected with the conductive element 130.

Wherein a plurality represents 2 or more, for example, in some embodiments, as shown in fig. 1-2, 3 shunt terminals 150 may be disposed outside of the housing 110.

The shunt terminal 150 may be disposed on the front and rear walls of the housing 110, or the shunt terminal 150 may be disposed on the peripheral wall of the housing 110, such as, without limitation, in some embodiments, the shunt terminal 150 is disposed on the front wall of the housing 110 as shown in fig. 1-2.

In this embodiment, the plurality of shunt terminals 150 may include at least one positive shunt terminal 151, at least one negative shunt terminal 152, and at least one N-pole shunt terminal 153, the plurality of capacitor cores 121 may be divided into a plurality of columns, the plurality of capacitor cores 121 in each column may be connected in series, the plurality of columns may be directly connected in parallel to the conductive member 130 with each other, the at least one positive shunt terminal 151 may be electrically connected with the conductive member 130, the at least one negative shunt terminal 152 may be electrically connected with the conductive member 130, the at least one N-pole shunt terminal 153 may be electrically connected with the conductive member 130, and the shunt terminals 150 between the plurality of capacitors 100 may be electrically connected.

According to the capacitor 100 provided by the embodiment of the application, through the arrangement of the plurality of parallel terminals 150, the electric connection among the plurality of capacitors 100 is realized, and the number of conductive parts is reduced, so that the material cost and the processing cost are saved, the reliability of connection among the plurality of capacitors 100 is improved, and the integration level of the plurality of capacitors 100 is improved.

In some embodiments, as shown in fig. 2, capacitor 100 may further comprise: a temperature detection connection 160.

The temperature detection connection 160 may be disposed outside the housing 110, and the temperature detection connection 160 may be used to mount a temperature sensor.

In this embodiment, as shown in fig. 2, the temperature detecting connection portion 160 may be a screw structure extending out of the housing 110, the temperature sensor may be connected to the temperature detecting connection portion 160 by a threaded connection, and the NTC temperature line 600 of the temperature sensor may extend out of the housing 110, so as to facilitate real-time detection of the temperature inside the housing 110.

In other embodiments, the temperature detecting connection portion 160 may be a threaded hole, the temperature sensor may be connected to the temperature detecting connection portion 160 by a threaded connection manner, and the NTC temperature line 600 (Negative Temperature Coefficient ) of the temperature sensor may extend out of the housing 110, so as to facilitate real-time detection of the internal temperature of the housing 110.

According to the capacitor 100 provided by the embodiment of the application, through the arrangement of the temperature detection connecting part 160, the real-time detection of the internal temperature of the capacitor 100 is realized, and the risk of thermal runaway caused by excessive temperature rise in the capacitor 100 is reduced, so that the safety performance of the whole capacitor 100 is improved.

In some embodiments, as shown in fig. 3-7, capacitor 100 may further comprise: a heat radiating fin 170 and a wind scooper 180.

The heat radiating fins 170 may be disposed at a sidewall of the case 110; the air guide cover 180 may cover the heat dissipation fins 170.

The heat dissipation fin 170 may have at least one of the following structural forms:

First, as shown in fig. 5, the heat dissipation fins 170 may be integral heat dissipation fins, and a split design may be provided between the heat dissipation fins 170 and the housing 110.

Second, as shown in fig. 4, the heat dissipation fins 170 may be distributed heat dissipation fins, and the heat dissipation fins 170 and the housing 110 may be separately designed.

Third, as shown in fig. 6, the heat dissipation fins 170 may be integral heat dissipation fins, and the heat dissipation fins 170 and the housing 110 may be integrally designed.

Fourth, the heat dissipation fins 170 may be distributed heat dissipation fins, and the heat dissipation fins 170 and the housing 110 may be integrally designed.

In this embodiment, the capacitor 100 may generate a large amount of heat in the operating state, the heat may be conducted to the housing 110 and the heat dissipation fins 170, cool air of the external environment may enter the air duct of the air guide cover 180, the cool air may exchange heat with the housing 110 and the heat dissipation fins 170, and the heat exchanged hot air may leave the air guide cover 180.

According to the capacitor 100 provided by the embodiment of the application, through the arrangement of the radiating fins 170 and the air guide cover 180, the air cooling heat exchange on the outer side of the shell 110 is realized, the radiating requirement of the capacitor 100 is met, and meanwhile, the guiding function of the air guide cover 180 is utilized to reduce the disorder of external air flow, so that the radiating rate of forced air cooling is accelerated.

In some embodiments, as shown in fig. 3, a thermally conductive material 190 may be provided between the heat sink fins 170 and the housing 110.

Wherein the thermally conductive material 190 may include, but is not limited to, a thermally conductive silicon wafer, a thermally conductive silicone grease, a thermally conductive silicone gel, or the like, such as, in some embodiments, the thermally conductive material 190 is a thermally conductive silicon wafer.

According to the capacitor 100 provided by the embodiment of the application, through the arrangement of the heat conducting material 190, the heat radiating fins 170 and the shell 110 can perform full heat exchange, so that the heat radiating effect is optimized, the temperature of the capacitor 100 in the operation process is effectively reduced, and the stability and performance of the capacitor 100 are improved.

In some embodiments, as shown in fig. 7, the capacitor 100 may further include: wind collection chamber 220 and wind turbine 230.

The wind collection chamber 220 may be in communication with the wind scooper 180; blower 230 may be in communication with plenum 220, and blower 230 may be used to drive the flow of air within cowl 180.

In this embodiment, the capacitor 100 may further include a water-air heat exchanger 210, the water-air heat exchanger 210 may be disposed between the wind collecting chamber 220 and the fan 230 and simultaneously communicate with the wind collecting chamber 220 and the fan 230, when the capacitor 100 is in an operating state, the capacitor 100 may generate a large amount of heat, the heat may be conducted to the housing 110 and the heat dissipation fins 170, the fan 230 may operate to accelerate a flow speed of cold air of an external environment, the cold air may enter the water-air heat exchanger 210 to exchange heat with cold water, the temperature of the cold air may be further reduced to enter the wind channel of the wind scooper 180, the cold air may exchange heat with the housing 110 and the heat dissipation fins 170, and the hot air after heat exchange may leave the wind scooper 180.

According to the capacitor 100 provided by the embodiment of the application, through the arrangement of the wind collecting cavity 220 and the wind turbine 230 and the arrangement of the radiating fins 170 and the wind scooper 180, external cold air disturbed by the wind turbine 230 can enter the wind channel of the wind scooper 180 to the maximum extent, the wind quantity passing through the wind channel in unit time is increased, the radiating duration is shortened, and the radiating efficiency is improved.

In some embodiments, as shown in fig. 8, the housing 110 may be provided with a plurality of vents 111.

Where multiple means 2 or more, for example, in some embodiments, as shown in fig. 8, the housing 110 may be provided with 4 vents 111.

In this embodiment, the capacitor 100 may generate a large amount of heat in an operating state, the heat may be transferred to the case 110, cool air of an external environment may enter the case 110 through the plurality of ventilation openings 111, the cool air may exchange heat with the integrated capacitor cell 120 and the case 110 through direct contact, and the heat-exchanged hot air may leave the case 110.

According to the capacitor 100 provided by the embodiment of the application, through the arrangement of the plurality of ventilation openings 111, air cooling and heat dissipation in direct contact in the shell 110 are realized, and the heat exchange duration is effectively shortened and the heat transfer rate is greatly accelerated under the condition that the whole occupied space of equipment is not increased.

In some embodiments, as shown in fig. 9-10, the vent 111 may be provided with heat sink fins 170.

The heat sink fins 170 may be transverse, vertical, or other directions, such as, without limitation, in some embodiments, as shown in fig. 9, the heat sink fins are transverse.

In this embodiment, the capacitor 100 may generate a large amount of heat in an operating state, the heat may be transferred to the case 110 and the heat dissipation fins 170, cool air of an external environment may enter the case 110 through the plurality of ventilation openings 111, the cool air may exchange heat with the integrated capacitor cell 120, the case 110 and the heat dissipation fins 170 through a direct contact manner, and the heat exchanged hot air may leave the case 110.

According to the capacitor 100 provided by the embodiment of the application, through the arrangement of the radiating fins 170, the cold air can exchange heat with the radiating fins 170, the shell 110 and the integrated capacitor pool 120 through the ventilation opening 111, so that the heat exchange area is increased and the heat transfer rate is greatly accelerated under the condition that the whole occupied space of equipment is not increased.

In some embodiments, as shown in fig. 11, the capacitor 100 may further include: wind collection chamber 220 and wind turbine 230.

The wind collection chamber 220 may communicate with the ventilation opening 111; a fan 230 may be in communication with the plenum 220, and the fan 230 may be used to drive the flow of air at the fins 170.

In this embodiment, the capacitor 100 may further include a water-wind heat exchanger 210, the water-wind heat exchanger 210 may be disposed between the wind collecting chamber 220 and the wind turbine 230 and simultaneously communicate with the wind collecting chamber 220 and the wind turbine 230, when the capacitor 100 is in an operating state, the capacitor 100 may generate a large amount of heat, the heat may be conducted to the case 110 and the heat dissipation fins 170, the wind turbine 230 may operate to accelerate a flow speed of cold air of an external environment, the cold air may enter the water-wind heat exchanger 210 to exchange heat with cold water, the temperature of the cold air may be further reduced to enter the case 110 through the ventilation opening 111, the cold air may exchange heat with the integrated capacitor pool 120, the case 110 and the heat dissipation fins 170, and the hot air after heat exchange may leave the case 110.

According to the capacitor 100 provided by the embodiment of the application, through the arrangement of the air collecting cavity 220 and the fan 230 and the arrangement of the radiating fins 170 and the ventilation openings 111, external cold air disturbed by the fan 230 can enter the shell 110 to the maximum extent, the air quantity passing through the ventilation openings 111 in unit time is increased, the radiating duration is shortened, and the radiating efficiency is improved.

In some embodiments, capacitor 100 may further comprise: wind collection chamber 220 and wind turbine 230.

The wind collection chamber 220 may communicate with the ventilation opening 111; a blower 230 may be in communication with the plenum 220, and the blower 230 may be used to drive the flow of air within the housing 110.

In this embodiment, the capacitor 100 may further include a water-wind heat exchanger 210, the water-wind heat exchanger 210 may be disposed between the wind collecting chamber 220 and the wind turbine 230 and simultaneously communicate with the wind collecting chamber 220 and the wind turbine 230, when the capacitor 100 is in an operating state, the capacitor 100 may generate a large amount of heat, the heat may be transferred to the case 110, the wind turbine 230 operates to accelerate a flow rate of cold air of an external environment, the cold air may enter the water-wind heat exchanger 210 to exchange heat with cold water, the temperature of the cold air may be further reduced to enter the case 110 through the ventilation opening 111, the cold air may exchange heat with the case 110 and the integrated capacitor cell 120, and the hot air after heat exchange may leave the case 110.

According to the capacitor 100 provided by the embodiment of the application, through the arrangement of the air collecting cavity 220 and the fan 230 and the arrangement of the ventilation opening 111, external cold air disturbed by the fan 230 can enter the ventilation opening 111 to the maximum extent, the air quantity passing through the ventilation opening 111 in unit time is increased, the heat dissipation time is shortened, and the heat dissipation efficiency is improved.

In some embodiments, as shown in fig. 12, the capacitor 100 may further include: the flow channel structure 240.

The flow channel structure 240 may be attached to a side wall of the housing 110, and the flow channel structure 240 may be used for circulating a heat exchange medium.

The flow channel structure 240 may be a temperature equalization plate, a liquid cooling plate, or a piping structure, etc., for example, in some embodiments, as shown in fig. 12, the flow channel structure 240 is a liquid cooling plate.

The flow channel structure 240 may be attached to the front and rear walls of the housing 110, or the flow channel structure 240 may be attached to the peripheral wall of the housing 110, such as, without limitation, in some embodiments, the flow channel structure 240 is attached to the rear wall of the housing 110 as shown in fig. 12.

The connection between the flow channel structure 240 and the housing 110 may include, but is not limited to, bolting, integrally forming, welding, etc., such as, in some embodiments, integrally forming the flow channel structure 240 with the housing 110.

In actual implementation, as shown in fig. 12, when the capacitor 100 is in an operating state, the capacitor 100 may generate a large amount of heat, the heat may be conducted to the housing 110, the flow channel structure 240 may have a flow channel water inlet 241 and a flow channel water outlet 242, the low-temperature heat exchange medium may enter the flow channel structure 240 through the flow channel water inlet 241, during the process that the low-temperature heat exchange medium flows in the flow channel structure 240, the low-temperature heat exchange medium may exchange heat with the housing 110 to become a high-temperature heat exchange medium, and finally the high-temperature heat exchange medium may leave the flow channel structure 240 through the flow channel water outlet 242.

According to the capacitor 100 provided by the embodiment of the application, through the arrangement of the flow channel structure 240, liquid cooling heat dissipation of the side wall of the shell 110 is realized, compared with air cooling heat dissipation, a heat exchange medium with higher specific heat capacity is adopted, the contact heat exchange area and the heat exchange volume flow are increased, the heat exchange efficiency is improved, meanwhile, heat dissipation is not independently arranged, the use of vulnerable parts such as a fan is reduced, and the reliability is improved.

In some embodiments, as shown in fig. 13, the capacitor 100 may further include: the flow channel structure 240.

The flow channel structure 240 may be arranged within the housing 110, and the flow channel structure 240 may be used for circulating a heat exchange medium.

The connection between the flow channel structure 240 and the housing 110 may include, but is not limited to, bolting, integrally forming, welding, etc., such as, in some embodiments, bolting the flow channel structure 240 to the housing 110.

In actual implementation, as shown in fig. 13, when the capacitor 100 is in an operating state, the capacitor 100 may generate a large amount of heat, the flow channel structure 240 may have a flow channel water inlet 241 and a flow channel water outlet 242, the housing 110 may have a water inlet 112 and a water outlet 113, the low-temperature heat exchange medium may enter the flow channel water inlet 241 through the water inlet 112 of the housing 110 and thus enter the flow channel structure 240, during the process that the low-temperature heat exchange medium flows in the flow channel structure 240, the low-temperature heat exchange medium may directly exchange heat with the integrated capacitor pool 120 to become a high-temperature heat exchange medium, and finally the high-temperature heat exchange medium may leave the flow channel structure 240 through the flow channel water outlet 242 and thus leave the water outlet 113 of the housing 110.

According to the capacitor 100 provided by the embodiment of the application, through the arrangement of the flow channel structure 240, liquid cooling heat dissipation in the shell 110 is realized, compared with an indirect contact heat dissipation mode, a heat transfer path is shortened, and a contact heat exchange area is increased, so that a heat dissipation effect is optimized, meanwhile, heat dissipation is not independently arranged, the use of vulnerable parts such as fans is reduced, and the reliability is improved.

In some embodiments, the flow channel structure 240 may include a plurality of spaced apart arrangements, and the plurality of flow channel structures 240 may be connected in parallel; and/or the flow channel structure 240 may include a plurality of spaced-apart arrangements, and the plurality of flow channel structures 240 may be connected in series.

Where a plurality may represent 2 or more, for example, in some embodiments, as shown in fig. 13-14, the flow channel structure 240 may include 4 spaced apart arrangements.

In some embodiments, as shown in fig. 13-14, the plurality of flow channel structures 240 may be connected in parallel, in particular, a low temperature heat exchange medium may enter the water inlet 112 of the housing 110, may be subsequently distributed to the plurality of flow channel water inlets 241 of the plurality of flow channel structures 240, a high temperature heat exchange medium may leave the plurality of flow channel water outlets 242 of the plurality of flow channel structures 240, and may finally be collected to the water outlet 113 of the housing 110.

In other embodiments, the plurality of flow channel structures 240 may be connected in series, and in particular, the flow channel water inlets 241 and the flow channel water outlets 242 of the plurality of flow channel structures 240 may be sequentially connected such that the plurality of flow channel structures 240 form an integral body having only one flow channel water inlet 241 and one flow channel water outlet 242 at the outermost side.

In still other embodiments, the plurality of flow channel structures 240 may be partially connected in parallel and partially connected in series.

According to the capacitor 100 provided by the embodiment of the application, through the design of the connection mode among the plurality of runner structures 240, a plurality of pipe distribution modes are provided for users to select, different pipe distribution directions can be selected according to actual project requirements, the flexibility of the runner structures 240 in layout is improved, and the use width of the capacitor 100 is increased.

In some embodiments, as shown in fig. 15, the housing 110 may have a water inlet 112 and a water outlet 113, and the water inlet 112 and the water outlet 113 may be used to circulate a heat exchange medium.

The water inlet 112 and the water outlet 113 may be provided in 1 or more, wherein a plurality may represent 2 or more, for example, in some embodiments, as shown in fig. 15, the housing 110 may have 1 water inlet 112 and 1 water outlet 113.

The heat exchange medium may be an insulating liquid, where the insulating liquid may include, but is not limited to, a fluorinated liquid, an insulating oil, deionized water, or the like, such as, in some embodiments, a fluorinated liquid.

In actual implementation, as shown in fig. 15, the low-temperature heat exchange medium may enter the housing 110 through the water inlet 112, the liquid level of the low-temperature heat exchange medium in the water inlet 112 continuously rises until the plurality of capacitor cores 121 in the housing 110 are immersed, the plurality of capacitor cores 121 directly exchange heat with the low-temperature heat exchange medium in a manner of completely immersing the whole in the low-temperature heat exchange medium, the low-temperature heat exchange medium absorbs heat generated by the plurality of capacitor cores 121 and becomes a high-temperature heat exchange medium, and finally the high-temperature heat exchange medium may leave the housing 110 through the water outlet 113.

According to the capacitor 100 provided by the embodiment of the application, through the design of performing immersion liquid cooling heat dissipation on the integrated capacitor pool 120, compared with the traditional liquid cooling heat dissipation and air cooling heat dissipation, the heat exchange efficiency is greatly improved, so that the power density of the capacitor 100 is improved, the tolerance of the capacitor core 121 is improved, the cooling parts are further reduced, and the cost is reduced.

The application also discloses a power unit 10.

In some embodiments, as shown in fig. 16-17, the power unit 10 includes: a power module 300 and a capacitor 100 as any one of the above.

The power module 300 has a module bus 310, and the module bus 310 is electrically connected to the input terminal 140 of the capacitor 100.

The power unit 10 may be applied to an inverter device, which may include, but is not limited to, a converter, an inverter, or a transformer, etc., without limitation.

In this embodiment, as shown in fig. 16-17, the power module 300 may include a heat sink, a power device, a module bus 310, etc., the module bus 310 may be mounted to the heat sink by bolting or other connection, the power device may be electrically connected to the module bus 310, and the module bus 310 may be electrically connected to the input terminal 140 of the capacitor 100.

According to the power unit 10 provided by the embodiment of the application, through the arrangement of the capacitor 100, the composite busbar structure of the existing integrated capacitor pool is omitted, the volume space is saved, the overall weight is reduced while the overall layout is facilitated, the later maintenance work is facilitated, the assembly difficulty of the capacitor 100 is reduced, the material cost and the processing cost are saved, the integration level of the whole power unit 10 is improved, and the power density of the whole power unit 10 is effectively increased.

In some embodiments, as shown in fig. 18, the capacitor 100 may include a plurality of parallel terminals 150 arranged side by side, the plurality of parallel terminals 150 may be arranged in a first plane of the capacitor 100, the plurality of first planes of the plurality of capacitors 100 may be coplanar, and the power unit 10 may further include: dc bus 400.

The dc bus 400 may be electrically connected to the plurality of shunt terminals 150 of one of the capacitors 100, and the dc bus 400 may be electrically connected to the plurality of shunt terminals 150 of the other capacitor 100.

Wherein a plurality may represent 2 or more, for example, in some embodiments, as shown in fig. 18, the capacitor 100 may include 3 arranged side-by-side.

In this embodiment, as shown in fig. 18, one dc bus 400 may be simultaneously connected to a plurality of shunt terminals 150 of two or more capacitors 100, the length of the dc bus 400 may be changed according to the number of capacitors 100 to be connected, the shunt terminals 150 may protrude from the electrode claws, and the dc bus 400 may be simultaneously electrically connected to the electrode claws from which the plurality of capacitors 100 protrude.

The first plane may be a top wall, a front wall, a rear wall, a bottom wall, or the like, such as in some embodiments, as shown in fig. 18, the first plane is a top wall, such as in still other embodiments, as shown in fig. 16, the first plane is a front wall.

According to the power unit 10 provided by the embodiment of the application, through the arrangement of the direct current busbar 400 and the structural design of the parallel connection terminal 150 on the first plane, the single direct current busbar 400 is simultaneously connected with two or more capacitors 100, only the length of the direct current busbar 400 is required to be changed according to actual project requirements, the construction times are reduced, and the processing efficiency is improved.

In some embodiments, as shown in fig. 19, the capacitor 100 may include a plurality of shunt terminals 150 arranged side by side, and the power unit 10 may further include: dc bus 400.

The dc bus 400 may be electrically connected to the plurality of shunt terminals 150 of one of the capacitors 100, and the dc bus 400 may be electrically connected to the plurality of shunt terminals 150 of an adjacent capacitor 100.

Wherein a plurality may represent 2 or more, for example, in some embodiments, as shown in fig. 19, the capacitor 100 may include 2 arranged side-by-side.

In this embodiment, as shown in fig. 19, one dc bus 400 may connect a plurality of shunt terminals 150 of two capacitors 100 at the same time, in other words, one dc bus 400 is required for electrical connection between two capacitors 100, two dc bus 400 is required for electrical connection between three capacitors 100, and so on, shunt terminals 150 of two adjacent capacitors 100 may be disposed opposite to each other, shunt terminals 150 may protrude from electrode claws, and dc bus 400 may be electrically connected to electrode claws from which two adjacent capacitors 100 protrude at the same time.

According to the power unit 10 provided by the embodiment of the application, through the arrangement of the direct current busbar 400 and the structural design of the parallel connection terminal 150 on the side wall, the single direct current busbar 400 is connected with two adjacent capacitors 100 at the same time, the length of the required direct current busbar 400 is shortened, the material cost of the whole power unit 10 is saved, and the reliability of connection among a plurality of capacitors 100 is improved.

In some embodiments, as shown in fig. 20, the capacitor 100 may include a plurality of shunt terminals 150 arranged side by side, and the power unit 10 may further include: a plurality of electrical conductors 500.

The plurality of conductors 500 may be electrically connected with the plurality of shunt terminals 150 of one of the capacitors 100, respectively, and the plurality of conductors 500 may be electrically connected with the plurality of shunt terminals 150 of an adjacent capacitor 100, respectively.

Wherein a plurality represents two or more than 2, for example, in some embodiments, as shown in fig. 20, the capacitor 100 may include 2 capacitors arranged side by side, and the side wall of each capacitor 100 may be provided with 3 shunt terminals 150,2 to connect 3 conductors 500 between the capacitors 100.

In this embodiment, as shown in fig. 20, one conductor 500 may connect two shunt terminals 150 of two capacitors 100 at the same time, and thus, in the case where 3 shunt terminals 150 are arranged on the side wall of one capacitor 100, 6 conductors 500 are required for connection between 3 conductors 500,3 capacitors 100 for connection between 2 capacitors 100, and so on, the shunt terminals 150 of two adjacent capacitors 100 may be disposed opposite to each other, the shunt terminals 150 may protrude from the electrode claws, and the dc bus bar 400 may be electrically connected to two electrode claws of two adjacent capacitors 100 at the same time, which are opposite to the protruding positions.

According to the power unit 10 provided by the embodiment of the application, through the arrangement of the plurality of conductors 500 and the structural design of the parallel connection terminals 150 on the side wall, the plurality of conductors 500 are respectively connected with two adjacent capacitors 100 at the same time, the consumption of the required conductors 500 is saved, the material cost of the whole power unit 10 is further reduced, and the strength of the conductors 500 is improved, so that the service life of the whole power unit 10 is prolonged.

In some embodiments, the plurality of capacitors 100 may be electrically connected with the plurality of power modules 300, respectively; and/or, the capacitor 100 may be electrically connected with the plurality of power modules 300; and/or, the plurality of capacitors 100 may be electrically connected with the power module 300.

In this embodiment, as shown in fig. 16, a single capacitor 100 may be electrically connected to a single power module 300, and a plurality of capacitors 100 may be electrically connected to a plurality of power modules 300, respectively.

In other embodiments, as shown in fig. 17, a single capacitor 100 may be electrically connected to multiple power modules 300.

In still other embodiments, multiple capacitors 100 may be electrically connected with a single power module 300.

According to the power unit 10 provided by the embodiment of the application, through the design of the matching modes of the capacitors 100 and the power modules 300, a plurality of matching modes of the number of the capacitors 100 and the number of the power modules 300 are provided for users to select, so that the power unit 10 can adapt to various requirements of different projects, the application range of the power unit 10 is enlarged, the flexibility of the power unit 10 in construction is improved, and the practicability of the power unit 10 is improved.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application.

In the description of the application, a "first feature" or "second feature" may include one or more of such features.

In the description of the present application, "plurality" means two or more.

In the description of the application, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.

In the description of the application, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A capacitor, comprising:

A housing;

2. The capacitor of claim 1, wherein the plurality of input terminals comprises at least one positive input terminal, at least one negative input terminal, and at least one N-pole input terminal.

3. The capacitor of claim 1, further comprising:

4. The capacitor of claim 1, further comprising:

5. The capacitor of any one of claims 1-4, further comprising:

A heat radiating fin arranged at a side wall of the housing;

The air guide cover is arranged on the radiating fins.

6. The capacitor of claim 5, further comprising:

The wind collecting cavity is communicated with the wind scooper;

7. The capacitor of any one of claims 1-4, wherein the housing is provided with a plurality of vents.

8. The capacitor of claim 7, wherein the vent is provided with heat sink fins.

9. The capacitor of claim 8, further comprising:

the air collecting cavity is communicated with the ventilation opening;

10. The capacitor of any one of claims 1-4, further comprising:

11. The capacitor of claim 10, wherein the capacitor is formed by a metal alloy,

The flow channel structures comprise a plurality of flow channel structures which are arranged in a separated mode, and the flow channel structures are connected in parallel;

Or alternatively, the first and second heat exchangers may be,

The flow channel structure comprises a plurality of flow channel structures which are arranged in a separated mode, and the plurality of flow channel structures are connected in series.

12. The capacitor of any one of claims 1-4, wherein the housing has a water inlet and a water outlet for circulating a heat exchange medium.

13. A power cell, comprising:

The capacitor of any one of claims 1-12;

14. The power cell of claim 13, wherein the capacitor comprises a plurality of capacitors arranged side-by-side, a corresponding plurality of shunt terminals of the capacitors being arranged in a first plane of the capacitors, the plurality of first planes of the plurality of capacitors being coplanar, further comprising:

15. The power cell of claim 13, wherein the capacitor comprises a plurality of capacitors arranged side-by-side, a corresponding plurality of shunt terminals of the capacitor being arranged at a sidewall of the capacitor, further comprising:

16. The power cell of claim 13, wherein the capacitor comprises a plurality of capacitors arranged side-by-side, a corresponding plurality of shunt terminals of the capacitor being arranged at a sidewall of the capacitor, further comprising:

17. A power unit according to any of claims 13-16, characterized in that,

The capacitors are respectively and electrically connected with the power modules.

18. A power unit according to any of claims 13-16, characterized in that,

The capacitor is electrically connected with the power modules.

19. A power unit according to any of claims 13-16, characterized in that,

The capacitors are electrically connected with the power module.