CN204258598U - A kind of radiator structure of power cell and rack - Google Patents
A kind of radiator structure of power cell and rack Download PDFInfo
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- CN204258598U CN204258598U CN201420795551.7U CN201420795551U CN204258598U CN 204258598 U CN204258598 U CN 204258598U CN 201420795551 U CN201420795551 U CN 201420795551U CN 204258598 U CN204258598 U CN 204258598U
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- power cell
- rack
- air channel
- cooling air
- circulation cooling
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Abstract
The utility model relates to the cooling technology field of current transformer or frequency converter, especially relates to a kind of radiator structure and rack of power cell, comprises power cell framework and the power cell that is arranged on this power cell framework and water-filled radiator; Described power cell comprises semiconductor device and DC support electric capacity; Described semiconductor device is arranged on described water-filled radiator, is provided with power cell circulation cooling air channel between described DC support electric capacity and described power cell framework.The radiator structure of the power cell that the utility model provides and rack, arrange power cell circulation cooling air channel in power cell, effective cooling DC support electric capacity; Further, power cell circulation cooling air channel is connected with rack circulation cooling air channel and fits in as integral type air channel, both improve the radiating efficiency of rack, and in turn saved the manufacturing cost of rack.
Description
Technical field
The utility model relates to the cooling technology field of current transformer or frequency converter, especially relates to a kind of radiator structure and rack of power cell.
Background technology
Power cell in current transformer or frequency converter is core component of its normal work, is also main heat generating components.The main heater members of power cell is: insulated gate bipolar transistor (Insulated Gate Bipolar Transistor the is called for short IGBT) semiconductor device such as module, controllable silicon and DC support electric capacity.Direct current support capacitor, also known as DC-Link capacitor.Direct current support capacitor, belongs to the one of passive device.Direct current support capacitor, now mainly adopt polypropylene film medium direct current support capacitor, it has, and high, the resistance to electric current of proof voltage be large, Low ESR, low inductance, capacity loss is little, leakage current is little, temperature performance is good, charge/discharge rates is fast, long service life (about 100,000 hours), safety anti-explosive good stability, the nonpolarity advantage such as easy for installation.Be widely used in power electronics industry.
It is unstable that high temperature not only can cause power cell to run, and useful life shortens, and even likely makes some parts burn.Caloric value is maximum at work can reach more than 2KW for the IGBT module of single power unit.In IGBT, core temperature will be burnt, even exploded reaching 150 ° of (novel 175 °) times.Whether the heat radiation of power cell well directly affects the whether stable operation of current transformer or frequency converter.
The heat radiation of existing power cell mainly contains following several scheme:
Wind-cooling heat dissipating.Be mounted on air-cooled radiator by the semiconductor device such as IGBT, controllable silicon, DC support electric capacity cools or uses the heat dissipation wind channel heat radiation of semiconductor device naturally.Air-cooled radiator is as the main product classification being different from water-filled radiator, and except radiator itself, be unable to do without the powerful effect of radiator fan, radiator fan has much different kinds in recent years, best as encapsulate fan, quiet first-selection; Then as LED fan etc.
Water-cooling.The semiconductor device such as IGBT, controllable silicon is mounted on water-filled radiator.Also to be mounted on water-filled radiator heat radiation bottom DC support electric capacity or to install independently fan cooling additional to DC support electric capacity specially.Water-cooling heat radiating system generally comprises with lower component: water-cooled block, circulation fluid, water pump, pipeline, water tank, heat exchanger etc.Water-cooled block is the metal derby that water channel is left in an inside, is made up of copper or aluminium, contacts and the heat that will absorb in components and parts with components and parts.Circulation fluid is flowed by acting in the pipeline of circulation of water pump, if liquid is water, is exactly the water-cooling system that we are commonly called as.The liquid absorbing components and parts heat will flow away from the water-cooled block components and parts, and the circulation fluid of new low temperature will continue the heat absorbing components and parts.Water pipe connects water pump, water-cooled block and water tank, and its effect allows circulation fluid circulate in an airtight passage and not leak outside, and allows liquid cooling heat radiation system normally work.
In the heat dissipation technology of above-mentioned water-cooled, the technical problem of existence is: in power cell, the radiating effect of DC support electric capacity is not good, needs to strengthen water-cooling plate area or independently cooling fan, increases cost.
Utility model content
The purpose of this utility model is the radiator structure and the rack that provide a kind of power cell, poor to solve the rack internal power unit radiating effect existed in prior art, and the technical problem that manufacturing cost is high.
The utility model is achieved through the following technical solutions:
A radiator structure for power cell, comprises power cell framework and the power cell device that is arranged on this power cell framework and water-filled radiator; Described power cell device mainly comprises semiconductor device and DC support electric capacity; Described semiconductor device is arranged on described water-filled radiator, is provided with power cell circulation cooling air channel between described DC support electric capacity and described power cell framework.
Wherein, gap is provided with between described DC support electric capacity and described power cell framework; Described power cell circulation cooling air channel is arranged in described gap.The technique effect of this technical scheme is, between DC support electric capacity and described power cell framework, arrange power cell circulation cooling air channel in gap, not only convenient but also save cost.
Further, described DC support electric capacity is provided with electric capacity housing, forms hemi-closure space between described electric capacity housing and described power cell framework, and this hemi-closure space forms power cell circulation cooling air channel.The technique effect of this technical scheme is, forms power cell circulation cooling air channel by hemi-closure space, saves the radiating effect that cost can ensure again DC support electric capacity.
The utility model also provides a kind of rack, and comprise cabinet and rack circulation cooling air channel, this rack also comprises the radiator structure of power cell as above; Wherein, described power cell circulation cooling air channel is connected with described rack circulation cooling air channel.
Further, described rack also comprises water cooling plant and water wind heat exchanger; Described rack circulation cooling air channel is connected with described water cooling plant by described water wind heat exchanger.The technique effect of this technical scheme is, by being connected with the water wind heat exchanger of water cooling plant, ensure that on the basis of water-cooling effect of rack entirety, can also realize the cooling of power cell.
Wherein, described water wind heat exchanger comprises radiator fan in cabinet.The technique effect of this technical scheme is, ensure that the radiating effect of water cooling plant.
Wherein, described rack circulation cooling air channel is provided with cooling driver element, and described cooling driver element is arranged on described cabinet sidepiece, is communicated with outside air.The technique effect of this technical scheme is, cooling driver element is communicated with outside air, the stability of the cooling effect of guaranteed output unit.
Preferably, described cooling driver element comprises cooling fan.The technique effect of this technical scheme is, adopts cooling fan while guarantee cooling effect, simple installation, cost-saving.
Preferably, described cabinet is provided with cabinet air inlet in the air inlet position near described power cell circulation cooling air channel.The technique effect of this technical scheme is, improves the radiating effect in power cell circulation cooling air channel.
Further, described rack comprises multiple power cell circulation cooling air channel, is connected respectively with described rack circulation cooling air channel.The technique effect of this technical scheme is, rack circulation cooling air channel, as the public air channel of rack, cools whole rack, improves the utilance in rack circulation cooling air channel, has saved cost.
The beneficial effects of the utility model:
The radiator structure of the power cell that the utility model provides and rack, arrange power cell circulation cooling air channel in power cell, effective cooling DC support electric capacity; And, power cell circulation cooling air channel is connected with rack circulation cooling air channel and fits in as integral type air channel, both improve the radiating efficiency of rack, and in turn saved the manufacturing cost of rack.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is execution modes more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The three-dimensional exploded view of the power cell that Fig. 1 provides for the utility model embodiment;
The structural representation of the rack that Fig. 2 provides for the utility model embodiment;
The structural representation of the rack that Fig. 3 provides for another embodiment of the utility model.
Reference numeral:
1-DC support electric capacity; 2-semiconductor device; 3-water-filled radiator; 4-power cell framework; 41-power cell air inlet; 4a-framework side plate; 5-power cell circulation cooling air channel; 6-rack circulation cooling air channel; Radiator fan in 7-cabinet; 8-water wind heat exchanger; 9-components and parts; 10-cabinet; 11-cooling fan; 12-cabinet air inlet.
Embodiment
Be clearly and completely described the technical solution of the utility model below in conjunction with accompanying drawing, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
In description of the present utility model, it should be noted that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "left", "right", " vertically ", " level ", " interior ", " outward " they be based on orientation shown in the drawings or position relationship; be only the utility model and simplified characterization for convenience of description; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second ", " the 3rd " only for describing object, and can not be interpreted as instruction or hint relative importance.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition the concrete meaning of above-mentioned term in the utility model can be understood.
The three-dimensional exploded view of the power cell that Fig. 1 provides for the utility model embodiment; The structural representation of the rack that Fig. 2 provides for the utility model embodiment; The structural representation of the rack that Fig. 3 provides for another embodiment of the utility model.As Figure 1-3, a kind of radiator structure for the power cell in frequency converter or current transformer that the present embodiment provides, comprise power cell device, water-filled radiator 3 and power cell framework 4, power cell device mainly comprises semiconductor device 2 and DC support electric capacity 1.Semiconductor device 2, DC support electric capacity 1 and water-filled radiator 3 are arranged on power cell framework 4 respectively; Semiconductor device 2 is directly mounted on water-filled radiator 3, DC support electric capacity 1 and semiconductor device 2 laid out in parallel.Power cell framework 4 is made up of framework side plate 4a.Power cell circulation cooling air channel 5 is provided with between DC support electric capacity 1 and power cell framework 4.Air-cooled circulation cooling can be carried out to DC support electric capacity 1 in this power cell circulation cooling air channel 5, to solve the power cell internal heat relying on water-filled radiator directly to take away.
Wherein, any power cell circulation cooling air channel structure that DC support electric capacity can be made to dispel the heat is all at protection range of the present utility model.In the present embodiment, between DC support electric capacity 1 and power cell framework 4, be provided with gap.In order to optimize the structure of the power cell in the present embodiment, power cell circulation cooling air channel 5 is formed in this gap.DC support electric capacity 1 is provided with the electric capacity housing for fixedly mounting DC support electric capacity 1, and the gap between this electric capacity housing and power cell framework 4 forms hemi-closure space, and this hemi-closure space forms power cell circulation cooling air channel 5.Thus, the radiator structure of this power cell can utilize the structure of self to form power cell circulation cooling air channel, without the need to increasing water-cooling plate area or independently cooling fan in addition, provides cost savings.
Particularly, the sidepiece of power cell is provided with power cell air inlet 41; The one end in power cell circulation cooling air channel 5 is connected with power cell air inlet 41, and the other end can be connected with rack circulation cooling air channel 6.
Wherein, water-filled radiator 3 preferably adopts water or anti-icing fluid as coolant, can ensure the cooling effect of water-filled radiator, can reduce costs again.
The three-dimensional exploded view of the power cell that Fig. 1 provides for the utility model embodiment; The structural representation of the rack that Fig. 2 provides for the utility model embodiment.The present embodiment also provides a kind of rack, as depicted in figs. 1 and 2, comprises cabinet 10 and rack circulation cooling air channel 6, also comprises the radiator structure of power cell as above.Wherein, power cell circulation cooling air channel 5 is connected with rack circulation cooling air channel 6.Rack circulation cooling air channel 6 also can be connected with the heat dissipation wind channel of other components and parts 9 in cabinet, directly utilize rack circulation cooling air channel 6 to take away power cell circulation cooling air channel 5 and the heat in the heat dissipation wind channel of other components and parts 9, make to form all-in-one-piece circulating cooling system in whole cabinet.The present embodiment had both solved the heat dissipation problem of DC support electric capacity, did not need again to arrange separately other the circulation air path driver element such as separate fan, saved cost.
Further, rack also comprises water cooling plant and water wind heat exchanger 8.The main heat sink mode of water cooling plant (not having in figure to show) as this rack is set in cabinet.Water cooling plant has with lower component: water-cooled block, circulation fluid, pipeline and water tank, and wherein water tank can be arranged on this interior of equipment cabinet, also can be arranged in independent rack.Water-cooled block is the metal derby that water channel is left in an inside, is made up of copper or aluminium, contacts and will absorb the heat of components and parts with components and parts in rack.Circulation fluid is flowed by acting in the pipeline of circulation of extraneous water pump, if liquid is water, is exactly the water-cooling system that we are commonly called as.The liquid absorbing components and parts heat will flow away from the water-cooled block components and parts, and the circulation fluid of new low temperature will continue the heat absorbing components and parts.Pipeline connects water pump, water-cooled block and water tank, and its effect allows circulation fluid circulate in an airtight passage and not leak outside, and allows liquid cooling heat radiation system normally work.
And, in order to strengthen the radiating effect in cabinet, the cooling effect that water wind heat exchanger improves the water cooling plant of rack is set in rack.Water wind heat exchanger is exactly the device of a similar fin, and circulation fluid transfers heat to the fin with high surface area.The coolant of water wind heat exchanger 8 is water, anti-icing fluid or fluid cooling medium.Rack circulation cooling air channel 6 is connected with water cooling plant by water wind heat exchanger 8, thus improves the radiating effect in whole rack.
Wherein, water wind heat exchanger 8 comprises radiator fan 7 in cabinet, and in cabinet, the heat flowing into air can be taken away by radiator fan 7, improves the heat transfer effect of water wind heat exchanger.
The radiator structure of the power cell in the present embodiment and rack, arrange power cell circulation cooling air channel in power cell, effective cooling DC support electric capacity; And, power cell circulation cooling air channel is connected with rack circulation cooling air channel and fits in as integral type air channel, both improve the radiating efficiency of rack, and in turn saved the manufacturing cost of rack.
The structural representation of the rack that Fig. 3 provides for another embodiment of the utility model.The rack that another embodiment of the utility model provides, as shown in Figure 3, rack circulation cooling air channel 6 is provided with cooling driver element, and cooling driver element is arranged on cabinet 10 sidepiece, is communicated with outside air.The cooling that cooling driver element is used for the rack circulation cooling air channel 6 of whole rack drives, and drives power and cooling source for rack circulation cooling air channel 6 provides.
Preferably, in the present embodiment, cooling driver element adopts cooling fan 11, drives the wind body circulation in rack circulation cooling air channel 6, and is spilt in outside air by the heat in cabinet.Adopt cooling fan 11, simple installation, and institute takes up space, and saves cost little.
Cooling fan 11 comprises multiple, as aerofoil fan, centrifugal fan, mixed flow fan and cross flow fan.The blades push air of aerofoil fan flows with the direction identical with axle.Impeller and the screw of aerofoil fan are somewhat similar, it operationally, the flow direction of most air-flow is parallel with axle, in other words in the axial direction.Aerofoil fan is when inlet air flow is the free air of 0 static pressure, and it is least in power-consuming, also can be able to increase when in place along with the rising power consumption of air-flow counter-pressure.Aerofoil fan is contained on the rack of electric equipment usually, is sometimes also incorporated on motor, because axial flow fan structure is compact, can save a lot of space, simultaneously easy for installation, is therefore widely used.The present embodiment adopts aerofoil fan, and its feature had is: have higher flow rate, and medium blast can dispel the heat effectively to rack.
Operationally, blades push air flows with the direction (namely radial) perpendicular with axle centrifugal fan, and air inlet is in the axial direction, and gives vent to anger perpendicular to axis direction.In most cases, use aerofoil fan just can reach cooling effect, but, if when sometimes needing the blast that flow rotation 90 degree is discharged or needs are larger, just must centrifugal fan be selected.Blower fan is strict, also belongs to centrifugal fan.Its feature: limited flow rate, high blast.
Mixed flow fan flows to fan also known as diagonal, and the difference of mixed flow fan and aerofoil fan is, the air inlet of mixed flow fan is along axis, but to give vent to anger but be diagonal along axis and vertical axis.This fan claims taper shape due to blade and outer cover, therefore causes blast higher, and under same size and other comparable performances, compared with aerofoil fan, the noise of centrifugal fan is lower.Its feature: high flow rate and relatively high blast.
Cross flow fan can produce large-area distinguished and admirable, is generally used for the large surface of cooling device.The air inlet of this fan and giving vent to anger all perpendicular to axis.Cross flow fan is that the long barrel-shaped Vane wheel of use one carries out work, the bore of this barrel-shaped flabellum is all larger, because bore is large, could use lower rotating speed on the basis ensureing integrated air internal circulating load, thus, reduce the noise brought owing to running up.Rack in the present embodiment, this cross flow fan also can be adopted as cooling fan, and it has the technique effect of low flow velocity and low blast, and noise is lower.
Further, this rack circulation cooling air channel and outside air circulation cooling, cabinet is provided with cabinet air inlet 12 in power cell air inlet 41 position near power cell circulation cooling air channel simultaneously, when outside air is entered in cabinet, first the air inlet in ingoing power unit circulation cooling air channel, because the temperature of outside air is lower than the air themperature in cabinet, in quick ingoing power unit, improve the radiating effect in power cell circulation cooling air channel.The quantity of cabinet air inlet 12 can be multiple, is distributed in opposite side relative with cooling fan 11 on cabinet 10, makes cabinet air inlet 12 away from cooling fan 11, and the air themperature entered in cabinet can not be subject to the impact of the higher temperature gas of cooling fan discharge.
Further, in cabinet 10, be provided with multiple power cell, thus in cabinet 10, be provided with multiple power cell circulation cooling air channel 5.Each power cell circulation cooling air channel 5 is communicated with rack circulation cooling air channel 6 respectively.Rack circulation cooling air channel 6, as the public air channel in cabinet, cools whole rack, improves the utilance in rack circulation cooling air channel, has saved cost.
Last it is noted that above each embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to foregoing embodiments, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (10)
1. a radiator structure for power cell, comprises power cell framework and the power cell device that is arranged on this power cell framework and water-filled radiator; Described power cell device comprises semiconductor device and DC support electric capacity; Described semiconductor device is arranged on described water-filled radiator, it is characterized in that, is provided with power cell circulation cooling air channel between described DC support electric capacity and described power cell framework.
2. the radiator structure of power cell according to claim 1, is characterized in that, is provided with gap between described DC support electric capacity and described power cell framework; Described power cell circulation cooling air channel is arranged in described gap.
3. the radiator structure of power cell according to claim 2, it is characterized in that, described DC support electric capacity is provided with electric capacity housing, forms hemi-closure space between described electric capacity housing and described power cell framework, and this hemi-closure space forms power cell circulation cooling air channel.
4. a rack, comprises cabinet and rack circulation cooling air channel, it is characterized in that, also comprise the radiator structure of the power cell described in any one of claim 1-3; Wherein, described power cell circulation cooling air channel is connected with described rack circulation cooling air channel.
5. rack according to claim 4, is characterized in that, described rack also comprises water cooling plant and water wind heat exchanger; Described rack circulation cooling air channel is connected with described water cooling plant by described water wind heat exchanger.
6. rack according to claim 5, is characterized in that, described water wind heat exchanger comprises radiator fan in cabinet.
7. rack according to claim 4, is characterized in that, described rack circulation cooling air channel is provided with cooling driver element, and described cooling driver element is arranged on described cabinet sidepiece, is communicated with outside air.
8. rack according to claim 7, is characterized in that, described cooling driver element comprises cooling fan.
9. rack according to claim 7, is characterized in that, described cabinet is provided with cabinet air inlet in the air inlet position near described power cell circulation cooling air channel.
10. the rack according to any one of claim 4-9, is characterized in that, described rack comprises multiple power cell circulation cooling air channel, is connected respectively with described rack circulation cooling air channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420795551.7U CN204258598U (en) | 2014-12-15 | 2014-12-15 | A kind of radiator structure of power cell and rack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420795551.7U CN204258598U (en) | 2014-12-15 | 2014-12-15 | A kind of radiator structure of power cell and rack |
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| CN204258598U true CN204258598U (en) | 2015-04-08 |
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| CN201420795551.7U Expired - Fee Related CN204258598U (en) | 2014-12-15 | 2014-12-15 | A kind of radiator structure of power cell and rack |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490508A (en) * | 2016-01-15 | 2016-04-13 | 洛阳中重自动化工程有限责任公司 | High-voltage frequency converter power unit |
| CN107769525A (en) * | 2017-11-28 | 2018-03-06 | 西安中车永电电气有限公司 | The air-cooled auxiliary-radiating structure of power cell self-loopa and power cell drive device |
| CN107872937A (en) * | 2017-12-11 | 2018-04-03 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of driver |
| CN111447809A (en) * | 2020-05-13 | 2020-07-24 | 珠海格力电器股份有限公司 | Photovoltaic air conditioner, cooling assembly and control method of cooling assembly |
| CN112311206A (en) * | 2020-11-12 | 2021-02-02 | 苏州汇川技术有限公司 | Heat exchange system and frequency converter |
| CN114300971A (en) * | 2021-11-24 | 2022-04-08 | 科华数据股份有限公司 | Power module, electrical equipment and working method |
| CN116761386A (en) * | 2023-05-19 | 2023-09-15 | 华为数字能源技术有限公司 | Power converter with wind-liquid composite heat dissipation unit and energy storage system |
| CN107769525B (en) * | 2017-11-28 | 2024-04-26 | 西安中车永电电气有限公司 | Power unit self-circulation air-cooled auxiliary heat dissipation structure and power unit driving device |
-
2014
- 2014-12-15 CN CN201420795551.7U patent/CN204258598U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490508A (en) * | 2016-01-15 | 2016-04-13 | 洛阳中重自动化工程有限责任公司 | High-voltage frequency converter power unit |
| CN107769525A (en) * | 2017-11-28 | 2018-03-06 | 西安中车永电电气有限公司 | The air-cooled auxiliary-radiating structure of power cell self-loopa and power cell drive device |
| CN107769525B (en) * | 2017-11-28 | 2024-04-26 | 西安中车永电电气有限公司 | Power unit self-circulation air-cooled auxiliary heat dissipation structure and power unit driving device |
| CN107872937A (en) * | 2017-12-11 | 2018-04-03 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of driver |
| CN111447809A (en) * | 2020-05-13 | 2020-07-24 | 珠海格力电器股份有限公司 | Photovoltaic air conditioner, cooling assembly and control method of cooling assembly |
| CN111447809B (en) * | 2020-05-13 | 2023-10-24 | 珠海格力电器股份有限公司 | Photovoltaic air conditioner, cooling assembly and control method of cooling assembly |
| CN112311206A (en) * | 2020-11-12 | 2021-02-02 | 苏州汇川技术有限公司 | Heat exchange system and frequency converter |
| CN112311206B (en) * | 2020-11-12 | 2022-04-26 | 苏州汇川技术有限公司 | Heat exchange system and frequency converter |
| CN114300971A (en) * | 2021-11-24 | 2022-04-08 | 科华数据股份有限公司 | Power module, electrical equipment and working method |
| CN116761386A (en) * | 2023-05-19 | 2023-09-15 | 华为数字能源技术有限公司 | Power converter with wind-liquid composite heat dissipation unit and energy storage system |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20201215 |