CN108054411A - A kind of commercial car fuel cell heat management system - Google Patents
A kind of commercial car fuel cell heat management system Download PDFInfo
- Publication number
- CN108054411A CN108054411A CN201810042717.0A CN201810042717A CN108054411A CN 108054411 A CN108054411 A CN 108054411A CN 201810042717 A CN201810042717 A CN 201810042717A CN 108054411 A CN108054411 A CN 108054411A
- Authority
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- China
- Prior art keywords
- fuel cell
- coolant
- hydrogen fuel
- temperature sensor
- management system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 58
- 239000001257 hydrogen Substances 0.000 claims abstract description 43
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 43
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000002826 coolant Substances 0.000 claims abstract description 40
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims description 9
- 230000004087 circulation Effects 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 230000036647 reaction Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 8
- 230000001839 systemic circulation Effects 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 description 5
- 239000000110 cooling liquid Substances 0.000 description 3
- 230000001351 cycling effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04029—Heat exchange using liquids
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a kind of commercial car fuel cell heat management system, including controller, hydrogen fuel cell system, Electrocontrolled tee valve, electric heater, radiator, variable-frequency fan, water supply tank, variable frequency pump, deionizer, throttle valve, particulate filter, temperature sensor I, temperature sensor II.The battery thermal management system of the present invention is realized in vehicle cold-starting, the coolant of heat management system flows through partial circulating realization and is rapidly heated, ensure that short time coolant temperature reaches hydrogen fuel cell reaction optimum temperature range, improve hydrogen fuel cell reaction efficiency, coolant is gradually switched to by systemic circulation by partial circulating by Electrocontrolled tee valve after coolant temperature reaches setting optimal reaction temperature scope, to reach better cooling effect, hydrogen fuel cell is made to be in optimal reaction temperature scope to improve its reaction efficiency.Being rapidly heated during the heat management system cold start-up of the present invention, also reduces the damage to battery, can extend the service life of battery.
Description
Technical field
The present invention relates to a kind of fuel cell heat management systems, and in particular to a kind of commercial car fuel cell heat management system
System.
Background technology
For Hydrogen Fuel-cell Vehicles because its energy conversion efficiency is high, product is clean water, runs low noise, is really to anticipate
The vehicle of zero emissions, zero pollution in justice, be subject to countries in the world, government is favored, and many enterprises of the country have taken up hydrogen at present
The research and development of fuel-cell vehicle.Hydrogen fuel cell is higher to the control accuracy requirement of reaction temperature, cell reaction temperature control essence
Degree is inadequate, can reduce hydrogen fuel cell reaction efficiency, while commerial vehicle firing rate after low temperature environment startup is slow, can influence
Hydrogen fuel cell service life.
The content of the invention
The present invention provides a kind of commercial car fuel cell heat management system, and hydrogen fuel cell reaction temperature is accurately controlled
System improves hydrogen fuel cell reaction efficiency, solves to heat the technical issues of slow after vehicle low temp operation environment starts.
The commercial car fuel cell heat management system of the present invention, including controller, hydrogen fuel cell system, automatically controlled threeway
Valve, electric heater, radiator, variable-frequency fan, water supply tank, variable frequency pump, deionizer, throttle valve, particulate filter, temperature
Spend sensor I, temperature sensor II；There is coolant circulation line and coolant pipeline inside the hydrogen fuel cell system
Import and export, temperature sensor I is connected at the hydrogen fuel cell system coolant pipe way outlet, and pipeline continues extension forward and connects
Electrocontrolled tee valve is connected to, pipeline is connected with electric heater, radiator to Electrocontrolled tee valve another two valve port respectively, and electric heater is with dissipating
Hot device is connected after being connected in parallel with variable frequency pump pipeline, and the variable frequency pump other end is connected with particulate filter pipeline, particulate matter
The filter other end is connected with hydrogen fuel cell system coolant pipeline entrance pipe；The hydrogen fuel cell system coolant pipe
Road inlet is equipped with temperature sensor II；Variable-frequency fan installation parallel with radiator；The radiator has exhaust outlet
D, exhaust outlet D are connected with water supply tank entrance pipe, and water supply tank outlet is connected with radiator inlet line；The deionizer with
Throttle valve is parallel-connected to the both ends of variable frequency pump together after being connected in series；The controller and Electrocontrolled tee valve, variable-frequency fan,
Variable frequency pump, temperature sensor I, temperature sensor II are electrically connected.
The electric heater uses vehicle separate high pressure power supply；The electric heater built-in temperature sensor, electric heater
The heating of coolant temperature automatic start or stopping heating being monitored according to its built-in temperature sensor.
The Electrocontrolled tee valve is shorter than Electrocontrolled tee valve warp through this coolant pipeline path of electric heater to variable frequency pump
Radiator is to this pipeline path of variable frequency pump.
Beneficial effects of the present invention：
The present invention commercial car fuel cell heat management system realize in vehicle cold-starting, heat management system it is cold
But liquid stream is rapidly heated through the partial circulating realization where electric heater, it is ensured that it is anti-that short time coolant temperature reaches hydrogen fuel cell
Optimum temperature range is answered, improves hydrogen fuel cell reaction efficiency, after coolant temperature reaches setting optimal reaction temperature scope
Coolant is gradually switched to by partial circulating by systemic circulation by Electrocontrolled tee valve, to reach better cooling effect, makes hydrogen fuel
Battery is in optimal reaction temperature scope to improve its reaction efficiency.
Being rapidly heated during heat management system cold start-up of the present invention can reduce the damage to fuel cell, can extend
The service life of fuel cell.
Description of the drawings
Fig. 1：Commercial car fuel cell heat management system schematic diagram；
In figure：1- water supply tanks, 2- radiators, 3- Electrocontrolled tee valves, 4- electric heaters, 5- temperature sensors I, 6- temperature pass
Sensor II, 7- deionizers, 8- throttle valves, 9- variable frequency pumps, 10- particulate filters, 11- variable-frequency fans, 12- controls
Device, 13- hydrogen fuel cell systems.
Specific embodiment
The commercial car fuel cell heat management system of the present invention is described further below in conjunction with the accompanying drawings：
In attached drawing 1, solid line is used to represent that coolant pipeline connects；Solid line upward arrow is used to illustrate liquid in pipeline to flow to；
Dotted line connects for indication circuit.
The commercial car fuel cell heat management system of the present invention, including controller 12, hydrogen fuel cell system 13, automatically controlled three
Port valve 3, electric heater 4, radiator 2, variable-frequency fan 11, water supply tank 1, variable frequency pump 9, deionizer 7, throttle valve 8, particle
Object filter 10, temperature sensor I 5, temperature sensor II 6；1 inside of hydrogen fuel cell system has coolant circulation pipe
Road and coolant pipeline import and export, the coolant pipe way outlet connect temperature sensor I 5, and pipeline continues extension and is connected with electricity
Control triple valve 3,3 another two valve port of Electrocontrolled tee valve difference pipeline connection electric heater 4, radiator 2, electric heater 4 and heat dissipation
Device 2 is connected after being connected in parallel with 9 pipeline of variable frequency pump, and 9 other end of variable frequency pump is connected with 10 pipeline of particulate filter, particle
10 other end of object filter is connected with 1 coolant line entry of hydrogen fuel cell system；1 coolant of hydrogen fuel cell system
Temperature sensor II 6 is connected at line entry；The variable-frequency fan 11 and 2 parallel installation of radiator；The radiator 2 has
Exhaust outlet D, exhaust outlet D are connected with 1 entrance pipe of water supply tank, and the outlet of water supply tank 1 is connected with 2 entrance pipe of radiator；It is described to go
Ion unit 7 be connected in series with throttle valve 8 after together be parallel-connected to the both ends of variable frequency pump 9；The controller 12 with it is automatically controlled
Triple valve 3, variable-frequency fan 11, variable frequency pump 9, temperature sensor I 5, temperature sensor II 6 are electrically connected.
The electric heater 4 uses vehicle separate high pressure power supply；4 built-in temperature sensor of electric heater, electrical heating
The coolant temperature automatic start that device 4 is monitored according to its built-in temperature sensor heats or stops heating.
The Electrocontrolled tee valve 3 is shorter than Electrocontrolled tee valve in this coolant pipeline path through electric heater 4 to variable frequency pump 9
3 flow through the cycling of electric heater 4 as partial circulating through this pipeline path of radiator 2 to variable frequency pump 9, i.e. coolant, flow through scattered
The cycling of hot device 2 is systemic circulation.
The variable-frequency fan 11 can change working frequency and increase or reduce it to radiator 2 under the control of the controller 12
Cooling effect.
The variable frequency pump 9 can change uninterrupted in pipeline under the control of the controller 12, so as to increase or reduce stream
Enter hydrogen fuel cell system coolant rate.
The effect of the water supply tank 1 be for entire heat management system system due to evaporate, leak etc. caused by cooling
Liquid loss compensates and discharges the gas generated in system.
The effect of the deionizer 7 is to capture to come from piping material ion releasing, corrosion etc. in heat management system instead
The ion that should be generated, to maintain coolant electrical conductivity in rational scope.
The effect of the throttle valve 8 is that control flows through the cold of 13 circuit of 7 circuit of deionizer and hydrogen fuel cell system
But the ratio of liquid, it is ensured that there are enough coolants to flow through 13 circuit of hydrogen fuel cell system and participate in cooling work, while ensure to flow
Cooling liquid measure through deionizer 7 can maintain coolant ion concentration in the reasonable scope.
The particulate filter 10 may filter that in pipeline because coolant cycle the burn into of pipeline is washed away caused by
Particulate matter prevents it from entering in hydrogen fuel cell system 13, influences service life.
When vehicle just starts, coolant temperature is less than hydrogen fuel cell reaction requirement optimum temperature model in heat management system
It encloses, controller 12 controls the heating partial circulating path where 3 opening electric heaters of Electrocontrolled tee valve 4, this path Xun Huan at this time
Short, cooling liquid measure is few and electric heater 4 can automatic start heating, heating is quick, it is ensured that the shortest time makes into hydrogen fuel cell
The coolant temperature of system 13 reaches optimum range.When temperature sensor II 6 is monitored into the cold of hydrogen fuel cell system 13
But after liquid temperature degree reaches setting optimal reaction temperature scope, controller 12 controls Electrocontrolled tee valve 3 to progressively close off 4 institute of electric heater
Partial circulating path, because of the structure feature of itself of Electrocontrolled tee valve 3, while progressively closing off partial circulating path, 2 institute of radiator
Systemic circulation path be also gradually opened, close partial circulating open systemic circulation can preferably take away hydrogen fuel cell system rapidly
The big calorimetric that 13 reactions generate, makes hydrogen fuel cell system 13 work in optimum temperature range, improves its reaction efficiency.
After systemic circulation fully opens, controller 12 controls variable-frequency fan 11 according to the temperature of temperature sensor II 6
Work controls the work of variable frequency pump 9 according to the temperature difference of temperature sensor I 5 and temperature sensor II 6；Work as temperature sensing
Device I 5, the temperature difference of temperature sensor II 6 are more than/are less than the setting temperature difference, and controller 12 controls variable frequency pump 9 to increase/reduce pipe
Flow in road；When temperature sensor II 6 temperature be more than/be less than set temperature value, controller 12 control variable-frequency fan 11 increase/
Working frequency refrigeration is reduced, so as to improve/reduce the cooling effect in hydrogen fuel cell system 13, so as to accurately control hydrogen fuel
Battery system 13 is in the range of optimal reaction temperature, improves its reaction efficiency.
The present invention commercial car fuel cell heat management system realize in vehicle cold-starting, heat management system it is cold
But liquid stream is rapidly heated through partial circulating realization, it is ensured that short time coolant temperature reaches hydrogen fuel cell reaction temperature, improves hydrogen
Fuel cell reaction efficiency；Gradually will after coolant temperature reaches setting optimal reaction temperature scope by Electrocontrolled tee valve 3
Coolant is switched to systemic circulation by partial circulating, to reach better cooling effect；By to temperature sensor I 5 and temperature sensing
The real-time accurate monitoring of the temperature difference, II 6 temperature of temperature sensor of device II 6, controller 12 control variable frequency pump 9 and variable-frequency fan
11 work, it is accurate that hydrogen fuel cell system 13 is controlled to be in optimal reaction temperature scope to improve its reaction efficiency.
Being rapidly heated when heat management system order of the present invention starts, also reduces the damage to battery, can extend battery
Service life.
The technical characteristic without description can be achieved by the prior art in the present invention, and details are not described herein, in above-mentioned reality
It applies in example, the preferred forms of the present invention is described, the present invention is not limited in above-mentioned specific embodiment, this field
The variations, modifications, additions or substitutions that those of ordinary skill makes in the essential scope of the present invention should also belong to the guarantor of the present invention
Protect scope.
Claims (3)
1. a kind of commercial car fuel cell heat management system, it is characterised in that：Including controller (12), hydrogen fuel cell system
(13), Electrocontrolled tee valve (3), electric heater (4), radiator (2), variable-frequency fan (11), water supply tank (1), variable frequency pump (9),
Deionizer (7), throttle valve (8), particulate filter (10), temperature sensor I (5), temperature sensor II (6)；It is described
There is coolant circulation line and coolant pipeline import and export, the hydrogen fuel cell system inside hydrogen fuel cell system (13)
Temperature sensor I (5) is connected at system (13) coolant pipe way outlet, pipeline continues extension forward and is connected with Electrocontrolled tee valve (3),
Pipeline is connected with electric heater (4), radiator (2), electric heater (4) and heat dissipation to Electrocontrolled tee valve (3) another two valve port respectively
Device (2) is connected after being connected in parallel with variable frequency pump (9) pipeline, variable frequency pump (9) other end and particulate filter (10) pipeline
Connection, particulate filter (10) other end are connected with hydrogen fuel cell system (13) coolant pipeline entrance pipe；The hydrogen
Fuel cell system (13) coolant pipeline inlet is equipped with temperature sensor II (6)；The variable-frequency fan (11) and heat dissipation
The parallel installation of device (2)；There is the radiator (2) exhaust outlet D, exhaust outlet D to be connected with water supply tank (1) entrance pipe, water supply tank
(1) outlet is connected with radiator (2) entrance pipe；The deionizer (7) be connected in series with throttle valve (8) after together with it is in parallel
It is connected to the both ends of variable frequency pump (9)；The controller (12) and Electrocontrolled tee valve (3), variable-frequency fan (11), variable frequency pump
(9), temperature sensor I (5), temperature sensor II (6) are electrically connected.
2. commercial car fuel cell heat management system as described in claim 1, it is characterised in that：The electric heater (4) uses
Vehicle separate high pressure power supply；Electric heater (4) built-in temperature sensor, electric heater (4) are sensed according to its built-in temperature
The heating of coolant temperature automatic start or stop heating that device monitors.
3. commercial car fuel cell heat management system as described in claim 1, it is characterised in that：Electrocontrolled tee valve (3) warp
Electric heater (4) is shorter than Electrocontrolled tee valve (3) through radiator (2) to frequency conversion in this coolant pipeline path to variable frequency pump (9)
This pipeline path of water pump (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810042717.0A CN108054411A (en) | 2018-01-17 | 2018-01-17 | A kind of commercial car fuel cell heat management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810042717.0A CN108054411A (en) | 2018-01-17 | 2018-01-17 | A kind of commercial car fuel cell heat management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108054411A true CN108054411A (en) | 2018-05-18 |
Family
ID=62127703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201810042717.0A Pending CN108054411A (en) | 2018-01-17 | 2018-01-17 | A kind of commercial car fuel cell heat management system |
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Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108615916A (en) * | 2018-06-21 | 2018-10-02 | 中山大洋电机股份有限公司 | A kind of fuel cell and its control method |
| CN108847497A (en) * | 2018-05-28 | 2018-11-20 | 湖北雷迪特冷却系统股份有限公司 | A kind of vehicle fuel battery heat management system |
| CN108859661A (en) * | 2018-07-23 | 2018-11-23 | 中国重汽集团济南动力有限公司 | A kind of hydrogen fuel cell car warm air system and control method |
| CN109378498A (en) * | 2018-10-23 | 2019-02-22 | 格罗夫汽车科技有限公司 | A fuel cell thermal management system for new energy vehicles |
| CN109473699A (en) * | 2018-11-12 | 2019-03-15 | 安徽江淮汽车集团股份有限公司 | A kind of hydrogen cell automobile low-temperature start system and control method |
| CN109473697A (en) * | 2018-11-07 | 2019-03-15 | 中山大洋电机股份有限公司 | Cooling circulation system of fuel cell |
| CN110116654A (en) * | 2019-05-24 | 2019-08-13 | 陕西重型汽车有限公司 | A kind of heat management system and heat control method of high power fuel cell commercial vehicle |
| CN110120533A (en) * | 2019-05-15 | 2019-08-13 | 上海楞次新能源汽车科技有限公司 | The cooling system of fuel cell system for vehicles |
| CN110311154A (en) * | 2019-07-04 | 2019-10-08 | 上海电气集团股份有限公司 | A kind of cooling system of hydrogen fuel cell pile |
| CN110380082A (en) * | 2019-07-29 | 2019-10-25 | 浙江吉利新能源商用车集团有限公司 | Fuel battery cooling system and degasification method |
| CN110539667A (en) * | 2019-08-12 | 2019-12-06 | 一汽解放汽车有限公司 | Hybrid electric vehicle thermal management system and hybrid electric vehicle |
| WO2019242189A1 (en) * | 2018-06-21 | 2019-12-26 | 中山大洋电机股份有限公司 | Fuel battery and control method therefor |
| CN110739470A (en) * | 2018-07-18 | 2020-01-31 | 郑州宇通客车股份有限公司 | auxiliary system of fuel cell |
| CN111816892A (en) * | 2020-07-15 | 2020-10-23 | 山东派蒙机电技术有限公司 | Control system and method for quickly establishing thermal management water pressure of hydrogen fuel cell automobile |
| CN111952629A (en) * | 2020-05-25 | 2020-11-17 | 武汉格罗夫氢能汽车有限公司 | A hydrogen energy vehicle fuel cell thermal management system |
| CN112060981A (en) * | 2020-08-27 | 2020-12-11 | 东风柳州汽车有限公司 | Thermal management system and control method of fuel cell vehicle |
| CN112768732A (en) * | 2021-02-03 | 2021-05-07 | 重庆长安新能源汽车科技有限公司 | Thermal management control method for fuel cell |
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| CN113178599A (en) * | 2021-04-23 | 2021-07-27 | 张智好 | Automatic preheating control system during cold start of fuel cell system |
| CN113363528A (en) * | 2020-03-04 | 2021-09-07 | 郑州宇通客车股份有限公司 | Fuel cell thermal management system and control method thereof |
| CN114234036A (en) * | 2021-12-02 | 2022-03-25 | 中车株洲电力机车有限公司 | Solid-state hydrogen storage tank and hydrogen storage system for hydrogen energy rail vehicle |
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| FR3115635A1 (en) * | 2020-10-26 | 2022-04-29 | Liebherr-Aerospace Toulouse Sas | SYSTEM AND METHOD FOR COOLING A FUEL CELL ASSEMBLY |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108847497A (en) * | 2018-05-28 | 2018-11-20 | 湖北雷迪特冷却系统股份有限公司 | A kind of vehicle fuel battery heat management system |
| CN108847497B (en) * | 2018-05-28 | 2020-09-11 | 湖北雷迪特冷却系统股份有限公司 | A vehicle fuel cell thermal management system |
| WO2019242189A1 (en) * | 2018-06-21 | 2019-12-26 | 中山大洋电机股份有限公司 | Fuel battery and control method therefor |
| CN108615916A (en) * | 2018-06-21 | 2018-10-02 | 中山大洋电机股份有限公司 | A kind of fuel cell and its control method |
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Application publication date: 20180518 |