CN218102976U - Compact type power unit module - Google Patents
Compact type power unit module Download PDFInfo
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- CN218102976U CN218102976U CN202222198360.XU CN202222198360U CN218102976U CN 218102976 U CN218102976 U CN 218102976U CN 202222198360 U CN202222198360 U CN 202222198360U CN 218102976 U CN218102976 U CN 218102976U
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- 239000003990 capacitor Substances 0.000 claims abstract description 35
- 230000000712 assembly Effects 0.000 claims abstract description 8
- 238000000429 assembly Methods 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000012212 insulator Substances 0.000 claims description 5
- 239000004519 grease Substances 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 16
- 238000009434 installation Methods 0.000 description 9
- 238000001816 cooling Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Abstract
The utility model provides a compact type power unit module, include: n unit assemblies, each unit assembly comprising: an LC resonance circuit and a diode rectification unit; the diode rectifying unit adopts M groups of diode rectifying modules which are connected in series, and each group of diode rectifying modules comprises 4 diodes; further comprising: a power unit radiator and a diode rectifier module fixing plate; the LC resonance circuits of the unit components are sequentially arranged above the power unit radiator and are fixed with the power unit radiator; the diode rectifying units of each unit assembly are sequentially arranged above the diode rectifying module fixing plate and are fixed with the diode rectifying module fixing plate; the N unit assemblies are connected in parallel according to the sequential arrangement direction; the LC resonance circuit comprises a resonance capacitor and a resonance transformer; the resonant capacitor is connected in series to one pole of the primary side of the resonant transformer through the litz cable; the secondary side of the resonant transformer is connected with the diode rectifying unit through a lead.
Description
Technical Field
The utility model belongs to the high voltage field of charging, more specifically relates to a compact type power unit module.
Background
In a high-voltage grid-connected charging system, the input voltage reaches 4kV DC, the output voltage reaches 6.4kV DC, and a switch device in a high-voltage charging cabinet must meet the requirements of corresponding voltage level and electrical safety distance, so the high-voltage grid-connected charging system has high requirements on circuits.
The mature charging schemes include a Buck-Boost hybrid charging scheme, an H-bridge inversion-rectification hybrid charging scheme, an LC resonance-rectification charging scheme and the like. The Buck-Boost hybrid charging scheme is mainly characterized by few used switching devices, simple structure and no isolation between input and output. Because low-voltage switch devices and application are mature, a two-level Buck-Boost hybrid charging scheme is mainly adopted in a low-voltage charging system, while a high-voltage charging system can meet requirements only by adopting a three-level Buck-Boost hybrid charging scheme, but the three-level charging scheme is not mature in technology when applied to the high-voltage charging system, and meanwhile, the non-isolation of input and output in the high-voltage system has high requirements on the devices and the use space of the devices, so that the low-voltage charging system cannot be applied in an engineering mode.
The H-bridge inversion-rectification hybrid charging scheme is mainly characterized in that input and output are isolated, the H-bridge inversion-rectification hybrid charging scheme can be applied to a high-voltage and low-voltage charging system, meanwhile, the technical scheme is mature, the inversion side adopts three-level H-bridge inversion to meet the requirement of high input voltage, but due to the existence of the intermediate frequency transformer in the charging system, the charging equipment is large in size, heavy in mass and incapable of being popularized in application.
The LC resonance-rectification charging scheme is mainly characterized by high working frequency, low loss and high power density of devices, the technical scheme applied to the low-voltage charging system is mature, and the scheme applied to the high-voltage charging system is not reported.
SUMMERY OF THE UTILITY MODEL
To the defect of prior art, the utility model aims at providing a compact type power unit module aims at solving current LC resonance-rectification power module bulky, is applied to the inconvenient problem in high voltage charging field.
To achieve the above object, the present invention provides a compact power unit module, including: n unit assemblies, each unit assembly including: an LC resonance circuit and a diode rectification unit; the diode rectifying unit adopts M groups of diode rectifying modules which are connected in series, and each group of diode rectifying modules comprises 4 diodes; n and M are both positive integers;
the compact power cell module further includes: a power unit radiator and a diode rectifier module fixing plate; the LC resonance circuits of the unit assemblies are sequentially arranged above the power unit radiator and fixed with the power unit radiator; the diode rectifying units of each unit assembly are sequentially arranged above the diode rectifying module fixing plate and are fixed with the diode rectifying module fixing plate;
the N unit assemblies are connected in parallel according to the sequential arrangement direction;
the LC resonance circuit comprises a resonance capacitor and a resonance transformer; the resonant capacitor is connected in series to one pole of the primary side of the resonant transformer through the litz cable; the secondary side of the resonant transformer is connected with the diode rectifying unit through a lead.
In an optional example, the compact power cell module further comprises: n input terminal wiring supports;
the N input end wiring supports are fixed on one side of the power unit radiator and are respectively arranged with the N LC resonance circuits to form N independent loops;
each input end wiring support is fixedly provided with 2 input wiring terminals, one input wiring terminal connects the resonant capacitor in series to one pole of the primary side of the resonant transformer through a litz cable, and the other input wiring terminal is connected to the other pole of the primary side of the resonant transformer through the litz cable;
the resonance transformer is integrally encapsulated in an aluminum profile shell, and the bottom of the resonance transformer is directly installed and fixed on the power unit radiator.
In an optional example, the compact power cell module further comprises: the binding wire bracket and the N temperature sensors are arranged on the binding wire bracket;
a temperature sensor is arranged around each resonant transformer; the wires of the N temperature sensors are gathered through the wire binding bracket and then are connected with the outside; and the temperature sensor and the wire binding bracket are both fixed on the power unit radiator.
In an optional example, the diode rectifier module fixing plate is fixed on the power unit radiator through bolts, and the power unit radiator is a whole aluminum radiator and has no radiating fins.
In an alternative example, the power unit heat sink upper portion is secured with a ground lead bar.
In an optional example, a drawing slide rail is respectively installed at the upper side and the lower side of the back of the power unit radiator.
In an optional example, the diode rectifying unit uses a diode rectifying module insulating frame as an installation carrier, and is provided with a diode module radiator, an insulator, M groups of diode rectifying modules, a diode rectifying module composite busbar and M filter capacitors.
In an optional example, the diode module radiator is a finned radiator, the cooling mode is natural cooling, and heat-conducting silicone grease is coated on the bottoms of the M groups of diode rectifier modules and is installed on the diode module radiator.
Generally, through the utility model discloses above technical scheme that conceive compares with prior art, has following beneficial effect:
1) The utility model provides a compact power unit module with isolated input and output, high safety;
2) The utility model provides a compact power unit module can be cascaded by a plurality of modules, the voltage of a single module is reduced, the selection of devices is convenient, and the integrated design is convenient;
3) The utility model provides a compact type power unit module synthesizes LC resonance circuit, diode rectifier circuit, reduces the compact type equipment of volume adaptation of unit module.
Drawings
Fig. 1 is a schematic diagram of a cascade LC resonant circuit and a rectifying circuit provided in an embodiment of the present invention;
fig. 2 is a plan structure diagram of a power unit module provided by the embodiment of the present invention;
fig. 3 is a perspective view structural diagram of a diode rectifier circuit according to an embodiment of the present invention;
fig. 4 is a schematic installation diagram of a diode rectifier module according to an embodiment of the present invention;
the same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein: 1. the input end is a wiring support; 2 is an input terminal; 3 is a litz cable; 4 is a resonance capacitor; 5 is a resonance transformer; 6 is a temperature sensor; 7 is a diode rectifier module fixing plate; 8 is a diode rectifying unit; 9 is a grounding lead row; 10 is a wire binding bracket; 11 is a power unit radiator; 12 is a filter capacitor 1;13 is a filter capacitor 2;14 is a filter capacitor 3;15 is a filter capacitor 4;16 is a diode rectifying module insulating frame; 17 is a diode rectifier module composite busbar; 18 is a diode module radiator; 19-an insulator; 20 is a diode rectifying module 1;21 is a diode rectifying module 2;22 is a diode rectifying module 3; and 23 is a diode rectifier module 4.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
To the defect of prior art, an object of the utility model is to provide a high pressure is charged with compact type parallel circuit power unit module aims at solving high-pressure and hangs net battery charging outfit high power density, low-loss problem.
In order to achieve the above object, the utility model provides a synthesize LC resonance circuit, diode rectifier circuit in the power unit module of the cascaded LC resonance mode of charging of an organic whole, the module is inside to adopt the parallelly connected and multipolar rectifier circuit series connection form of multistage LC resonance circuit, and LC resonance circuit number of establishing ties and rectifier circuit number of establishing ties depend on high-voltage charging system's input and output voltage grade.
The utility model discloses the technical problem that will solve is applied to the subassembly that charges in the high-pressure charging system for a design section, is used for the compact type power unit module that high pressure charges, and the module possesses that power density is high, occupy characteristics such as small, light in weight, installation and maintenance convenience.
By integrating the advantages of the traditional high-low voltage charging scheme, the compact power unit module provided by the utility model adopts a cascade LC resonance-rectification scheme; the principle is that LC resonance is adopted to realize IGBT soft switching, loss is reduced, power density is improved, the working frequency of an LC resonance device is 20kHz at the maximum, and because the working voltage of the switching device working at the frequency is not high, a plurality of power unit modules are connected in series to realize 4kV direct-current voltage input, and the input voltage of a single power unit module is reduced;
four-stage parallel LC resonance and rectification loops are adopted in each power unit module; the primary side input of the resonant transformer is low voltage, and the secondary side is output in a mode of connecting a four-stage diode rectifying circuit in series; a single LC resonance circuit input in the power unit module is connected with the primary side of a resonance transformer through a resonance capacitor, four windings on the secondary side of the resonance transformer are connected in series after being rectified by a diode, and 0-6.4 kV high-voltage electricity is output;
the power unit module for charging has the following characteristics:
(1) The input and the output are isolated by adopting the resonant transformer, so that the loss is reduced and the safety is provided;
(2) The power unit modules are flexible in composition, and the series-parallel connection structure is adjusted according to input and output voltages;
(3) The parallel LC resonance circuit effectively reduces the current of a single loop and reduces the loss;
(4) The unit module is integrally designed, and has small volume, high power density and convenient installation and maintenance.
The utility model discloses specific technical scheme does:
the utility model provides a power unit module adopts parallel LC resonance circuit to add series connection formula rectifier circuit to the power unit module of four parallel four strings is the example, establishes ties for level four parallel LC resonance circuit and level four series connection formula rectifier circuit promptly, and the schematic diagram of circuit is shown in fig. 1.
The front end of the embodiment is provided with the direct current support capacitor and the connecting loop, and the direct current support capacitor is large in capacitance value and large in size, so that the direct current support capacitor and the power unit module are not easy to be integrally installed.
The power unit module is divided into four groups of inputs to be connected to a resonant circuit, one pole of each group of inputs is connected with a resonant capacitor in series, two poles of each group of inputs are connected to the input end of a resonant transformer, a single resonant transformer outputs four windings, each winding is connected with a rectifying module formed by four diodes, and the four rectifying modules are connected in series to achieve high-voltage output.
Since the power cell module outputs a high voltage, the rectifier circuit portion must be electrically and physically isolated from the front end circuit. In order to reduce the installation volume of a rectifier module consisting of four diodes, an integrally integrated diode rectifier module with high voltage-resistant grade is adopted, the diode rectifier modules with the same voltage grade output are installed in a centralized mode, a composite busbar is used for output parallel connection, a filter capacitor is connected externally, and the volume of the rectifier module is reduced;
as shown in fig. 2, the right side of the planar structure diagram of the power unit module of this embodiment is provided with four groups of input wires, the four groups of inputs are mutually independent and respectively connected to the resonant capacitor and the resonant transformer, the left side is provided with four groups of rectifier modules, and each group of rectifier modules includes four diode rectifier modules. As shown in fig. 3, which is a perspective view of two sets of rectifier modules, there is a potential difference between the positive and negative electrodes of the four sets of rectifier modules, and the high voltage output of the power unit module is realized by connecting the positive and negative electrodes in series. As shown in fig. 4, which is an installation diagram of four diode rectifier modules, the positive electrodes or negative electrodes of the outputs of the four diode rectifier modules are at the same potential, and the positive electrodes and the negative electrodes of the equipotential are connected by using the composite busbar, so as to form positive and negative electrode outputs.
Examples
As shown in fig. 1, in a schematic diagram of a power unit module of this embodiment, four parallel paths of LC resonant circuits and rectifier circuits are used, four groups of circuits are respectively labeled as a group a, B, C, and D, where the group a includes a C1 resonant capacitor, a T1 resonant transformer, four diode rectifier modules D11 to D14, and four filter capacitors C11 to C14.
A single power unit module takes a power unit radiator 11 as an installation carrier, four input end wiring supports 1 are installed on the power unit radiator, 2 input terminals 2 are fixed on each input end wiring support 1, one end of each input end wiring support is connected to a resonant capacitor 4 through a litz cable 3, the other end of each input end wiring support is connected to a resonant transformer 5 through the litz cable 3, the litz wire with better anti-interference performance is adopted at the primary side input end of the resonant transformer 5, and the high-voltage wire with better insulation grade is adopted at the secondary side output end of the resonant transformer 5.
The resonance transformer 5 is a heating device, is integrally encapsulated in an aluminum profile shell, the bottom of the resonance transformer is directly installed and fixed on the power unit radiator 11, and the resonance transformer 5 exchanges heat through the power unit radiator 11; a temperature sensor 6 is arranged beside the resonant transformer 5 and used for measuring the temperature change of the resonant transformer 5, and the wiring of the temperature sensor 6 is connected with the outside after being gathered by a wire binding bracket 10.
The secondary side output side of the resonant transformer 5 is connected with the diode rectifying units 8, and the outputs of the four groups of diode rectifying units 8 only have positive and negative poles, as shown in fig. 3; the output voltage of the anode and the cathode is 0-1600V, and the anode and the cathode of the four groups of diode rectifying units 8 are connected in series to form the output voltage of 0-6400V.
Four groups of diode rectifying units 8 are installed at the rear end of the power unit module, the diode rectifying units 8 are high-voltage components as a whole, and the diode rectifying units 8 are fixed on a power unit radiator 11 through a diode rectifying module fixing plate 7; the diode rectifying unit 8 is integrally fixed on the diode rectifying module fixing plate 7; the diode rectifier module fixing plate 7 is fixed on the power unit radiator 11 through 5 high-strength bolts, the power unit radiator 11 is a whole aluminum radiator, the whole thickness of the substrate is 20mm, and no radiating fin is arranged.
The grounding lead row 9 is fixed on the upper portion of the power unit radiator 11, the upper side and the lower side of the back of the power unit radiator 11 are respectively provided with a drawing type sliding rail, the upper side and the lower side are respectively provided with 1 piece, the whole weight of the power unit module needs to be borne, the power unit module is convenient to integrally install and maintain when the cabinet body is installed, and the size and the weight of the high-voltage charging cabinet body can be effectively reduced by installing the drawing type sliding rails.
The single group of diode rectifying units 8 take a diode rectifying module insulating frame 16 as an installation carrier, and are provided with a diode module radiator 18, an insulator 19, four diode rectifying modules 20-23, a diode rectifying module composite bus 17 and four filter capacitors 12-15; in consideration of the ease of installation, the two groups of diode rectifying units 8 are designed as a single body, as shown in fig. 3, sharing the diode rectifying module insulating frame 16.
The diode module heat sink 18 is a finned heat sink, the cooling mode is natural cooling, and the bottoms of the four diode rectifier modules 20-23 are coated with heat-conducting silicone grease and mounted on the diode module heat sink 18, as shown in fig. 4. Taking one group of the diode rectifying units 8 as an example, the diode rectifying module 20 corresponds to the diode rectifying module D11 in the schematic diagram 1, the diode rectifying module 21 corresponds to the diode rectifying module D21 in the schematic diagram 1, the diode rectifying module 22 corresponds to the diode rectifying module D31 in the schematic diagram 1, and the diode rectifying module 23 corresponds to the diode rectifying module D41 in the schematic diagram 1, because the diode rectifying modules 20 to 23 output equal potentials of positive electrode and negative electrode.
As shown in fig. 4, the diode rectifier modules 20, 21 are oriented in the same direction when installed, and the diode rectifier modules 22, 23 are oriented in the same direction and rotated 180 ° from the direction of the diode rectifier modules 20, 21.
The alternating current input ends of the diode rectifier modules 20-23 are connected with the high-voltage cable on the secondary output side of the resonant transformer 5, the positive output end and the negative output end are connected with the inside of a rectifier circuit by using the diode rectifier module composite busbar 17 and only output positive and negative poles to the outside, the diode rectifier module composite busbar 17 is only provided with two layers, and the upper part of the diode rectifier module composite busbar 17 is connected with the filter capacitors 12-15. Taking one of the diode rectifying units 8 as an example, the filter capacitor 12 and the diode rectifying module 23 cooperate to correspond to the filter capacitor C41 in the schematic diagram 1, the filter capacitor 13 and the diode rectifying module 20 cooperate to correspond to the filter capacitor C11 in the schematic diagram 1, the filter capacitor 14 and the diode rectifying module 21 cooperate to correspond to the filter capacitor C21 in the schematic diagram 1, and the filter capacitor 15 and the diode rectifying module 22 cooperate to correspond to the filter capacitor C31 in the schematic diagram 1.
The diode module radiator 18 provided with the four rectifier diode rectifier modules 20-23 is connected with the diode rectifier module insulating frame 16, the diode rectifier module insulating frame 16 is fastened with the four insulators 19 through screws, and then 2 groups of diode rectifier units 8 are integrally fixed on the diode rectifier module fixing plate 7 to form a rectifier circuit of the power unit module.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A compact power cell module, comprising: n unit assemblies, each unit assembly comprising: an LC resonance circuit and a diode rectification unit; the diode rectifying unit adopts M groups of diode rectifying modules which are connected in series, and each group of diode rectifying modules comprises 4 diodes; n and M are positive integers;
the compact power cell module further includes: the power unit radiator and the diode rectifying module fixing plate; the LC resonance circuits of the unit assemblies are sequentially arranged above the power unit radiator and fixed with the power unit radiator; the diode rectifying units of each unit assembly are sequentially arranged above the diode rectifying module fixing plate and are fixed with the diode rectifying module fixing plate;
the N unit assemblies are connected in parallel according to the sequential arrangement direction;
the LC resonance circuit comprises a resonance capacitor and a resonance transformer; the resonant capacitor is connected in series to one pole of the primary side of the resonant transformer through the litz cable; the secondary side of the resonant transformer is connected with the diode rectifying unit through a conducting wire.
2. The power cell module of claim 1, further comprising: n input terminal wiring supports;
the N input end wiring supports are fixed on one side of the power unit radiator and are respectively arranged with the N LC resonance circuits to form N independent loops;
each input end wiring support is fixedly provided with 2 input wiring terminals, one input wiring terminal connects the resonant capacitor in series to one pole of the primary side of the resonant transformer through a litz cable, and the other input wiring terminal is connected to the other pole of the primary side of the resonant transformer through the litz cable;
the resonance transformer is integrally encapsulated in an aluminum profile shell, and the bottom of the resonance transformer is directly installed and fixed on the power unit radiator.
3. The power cell module of claim 1, further comprising: the binding wire bracket and the N temperature sensors are arranged on the binding wire bracket;
a temperature sensor is arranged around each resonant transformer; the wires of the N temperature sensors are gathered through the wire binding bracket and then are connected with the outside; and the temperature sensor and the wire binding bracket are both fixed on the power unit radiator.
4. The power cell module of claim 1, wherein the diode rectifier module mounting plate is bolted to the power cell heat sink, the power cell heat sink being a one-piece aluminum heat sink without fins.
5. The power cell module of claim 1, wherein a row of ground leads is secured to the power cell heat sink upper portion.
6. The power unit module as claimed in claim 1, wherein the upper and lower sides of the back of the power unit heat sink are respectively provided with a pull-out slide rail.
7. The power unit module of claim 1, wherein the diode rectifier unit uses a diode rectifier module insulating frame as a mounting carrier, and is provided with a diode module radiator, an insulator, M groups of diode rectifier modules, a diode rectifier module composite busbar and M filter capacitors.
8. The power cell module of claim 7, wherein the diode module heat sink is a finned heat sink, and wherein the M groups of diode rectifier modules are mounted to the diode module heat sink by applying thermally conductive silicone grease to the bottoms of the M groups of diode rectifier modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222198360.XU CN218102976U (en) | 2022-08-19 | 2022-08-19 | Compact type power unit module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222198360.XU CN218102976U (en) | 2022-08-19 | 2022-08-19 | Compact type power unit module |
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| Publication Number | Publication Date |
|---|---|
| CN218102976U true CN218102976U (en) | 2022-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222198360.XU Active CN218102976U (en) | 2022-08-19 | 2022-08-19 | Compact type power unit module |
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| CN (1) | CN218102976U (en) |
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- 2022-08-19 CN CN202222198360.XU patent/CN218102976U/en active Active
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Address after: 430202 No. 16, LiMiao Road, Canglong Island Science Park, Jiangxia District, Wuhan City, Hubei Province Patentee after: Wuhan Daquan Energy Technology Co.,Ltd. Country or region after: Zhong Guo Address before: 430202 No. 16, LiMiao Road, Canglong Island Science Park, Jiangxia District, Wuhan City, Hubei Province Patentee before: WUHAN NEW ENERGY INSTITUTE OF ACCESS EQUIPMENT & TECHNOLOGY Co.,Ltd. Country or region before: Zhong Guo |