CN111207931A - Environment testing system and environment testing method for power unit of electric automobile - Google Patents
Environment testing system and environment testing method for power unit of electric automobile Download PDFInfo
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- CN111207931A CN111207931A CN201811395674.0A CN201811395674A CN111207931A CN 111207931 A CN111207931 A CN 111207931A CN 201811395674 A CN201811395674 A CN 201811395674A CN 111207931 A CN111207931 A CN 111207931A
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- 238000012360 testing method Methods 0.000 title claims abstract description 84
- 239000007788 liquid Substances 0.000 claims abstract description 109
- 230000007613 environmental effect Effects 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 167
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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Abstract
An environment testing system and an environment testing method for an electric automobile power unit are provided with a main pipeline assembly, wherein the main pipeline assembly is provided with an inlet pipe for liquid media to flow to the electric automobile power unit and an outlet pipe for the liquid media to flow out of the electric automobile power unit, the electric automobile power unit environment testing system is also provided with a heat supply unit and a cold supply unit which are arranged between the inlet pipe and the outlet pipe in parallel and used for respectively heating and cooling the liquid media, and a circulating pump which is connected in series in the main pipeline assembly and used for providing power for the circulating flow of the liquid media, the electric automobile power unit environment testing system is provided with a first working state that the heat supply unit operates independently to heat the flowing liquid media and a second working state that the cold supply unit operates independently to cool the flowing liquid media, the function of carrying out environmental test to electric automobile power unit is realized through a set of system.
Description
Technical Field
The invention relates to the technical field of electric automobiles, in particular to an environment testing system and an environment testing method for a power unit of an electric automobile.
Background
In the prior art, environmental testing of an electric vehicle power unit is realized by adopting a plurality of sets of devices, which brings about the problems that the temperature rise and the temperature drop of the electric vehicle power unit cannot be simultaneously tested, an automobile is placed in an actual environment and is physically inseparable, artificial respective testing of the automobile cannot truly reproduce the actual performance of the change of the automobile on the environment, the results obtained by the respective testing methods cannot truly reflect the physical state of the electric vehicle power unit, in addition, the existing electric vehicle power unit environmental testing system has the problems that a single system can only test one electric vehicle power unit, the integration level is low, the cost is high, and the testing efficiency is low.
Therefore, there is a need for an improved environmental testing system for a power unit of an electric vehicle.
Disclosure of Invention
The invention aims to provide an environment testing system and an environment testing method for a power unit of an electric automobile.
In order to achieve the above object, the present invention provides an environmental testing system for power unit of electric vehicle, which has a main pipeline assembly, the main pipeline component is provided with an inlet pipe for the liquid medium to flow to the power unit of the electric automobile and an outlet pipe for the liquid medium to flow out of the power unit of the electric automobile, the environment testing system of the power unit of the electric automobile is also provided with a heat supply unit and a cold supply unit which are arranged between the inlet pipe and the outlet pipe in parallel and are used for respectively heating and cooling the liquid medium, and a circulating pump connected in series in the main pipeline assembly to provide power for the circulating flow of the liquid medium, the environment testing system for the power unit of the electric automobile is provided with a first working state in which the heat supply unit operates independently to heat the flowing liquid medium and a second working state in which the cold supply unit operates independently to cool the flowing liquid medium.
Further, the cold energy supply unit comprises a water cooler for providing cold water for the cold energy supply unit and a heat exchanger for transferring the cold energy of the cold water provided by the water cooler to the liquid medium, the water cooler is provided with a water inlet of the water cooler and a water outlet of the water cooler, the heat exchanger is provided with a cold energy input end and a cold energy output end, the cold energy input end is a water storage cavity, the cold energy output end is a liquid storage cavity, the water storage cavity is provided with a water inlet of the heat exchanger and a water outlet of the heat exchanger, and the cold energy supply unit further comprises a first circulation pipeline which is respectively connected with the water inlet of the water cooler and the water outlet of the heat exchanger and is connected with the water outlet of the water cooler and the water inlet of the heat exchanger for circulating the.
Furthermore, the cold quantity supply unit is also provided with a water collector for storing cold water provided by the water cooler, and the water collector comprises a first water collecting part connected between the water inlet of the water cooler and the water outlet of the heat exchanger in series and a second water collecting part connected between the water outlet of the water cooler and the water inlet of the heat exchanger in series.
Furthermore, at least one group of water collector water outlet and water collector water inlet which respectively correspond to the heat exchanger water inlet and the heat exchanger water outlet are arranged on the first water collecting part and the second water collecting part.
Furthermore, a first control valve is arranged between the water collector water inlet and the heat exchanger water outlet, a second control valve is arranged between the water collector water outlet and the heat exchanger water inlet, the first water collecting part and the second water collecting part are connected through a connecting pipe, and a third control valve is arranged on the connecting pipe; in the first working state, the first control valve and the second control valve are closed, and the third control valve is opened; in the second operating state, the first control valve and the second control valve are open, and the third control valve is closed.
Further, the liquid storage cavity is provided with a heat exchanger liquid outlet and a heat exchanger liquid inlet, the heat exchanger liquid outlet is connected with the inlet pipe, the outlet pipe is connected with the heat exchanger liquid inlet to form a second circulation pipeline, the liquid medium circulates between the electric automobile power unit and the liquid storage cavity through cold energy exchange, and at least one control valve is arranged on the second circulation pipeline to control the second circulation pipeline to be switched on and off.
Further, the heat supply unit is provided with a heater used for heating the liquid medium, the heater is provided with a heater liquid outlet and a heater liquid inlet, the heater liquid outlet is connected with the inlet pipe, the outlet pipe is connected with the heater liquid inlet to form a third circulation pipeline for the liquid medium heated by the heater to circulate between the electric automobile power unit and the heater, and the third circulation pipeline is provided with at least one control valve to control the on-off of the third circulation pipeline.
Further, the circulating pump has circulating pump inlet and circulating pump liquid outlet, the heat exchanger liquid outlet with the circulating pump inlet is connected, the circulating pump liquid outlet with the inlet tube is connected, the heat exchanger inlet with the outlet pipe is connected, the heat exchanger liquid outlet with be equipped with fourth control valve and first three-way pipe between the circulating pump inlet in proper order, the circulating pump liquid outlet with be equipped with second three-way pipe, fifth control valve and third three-way pipe between the inlet tube in proper order, the heat exchanger inlet with connect gradually sixth control valve and fourth three-way pipe between the outlet pipe.
Furthermore, the first three-way pipe is connected with the fourth three-way pipe, a seventh control valve is arranged between the first three-way pipe and the fourth three-way pipe, the heater liquid inlet is connected with the second three-way pipe, an eighth control valve is arranged between the heater liquid inlet and the second three-way pipe, the heater liquid outlet is connected with the third three-way pipe, and a ninth control valve is arranged between the heater liquid outlet and the third three-way pipe.
In order to achieve the above object, the present invention provides an environment testing method for an electric vehicle power unit, where the method applies the environment testing system for an electric vehicle power unit to perform environment testing on the electric vehicle power unit, and the testing method includes the following steps:
a cold resistance test step, wherein the cold supply unit operates independently to cool the power unit of the electric automobile;
and a heat resistance test step, wherein the heat supply unit is independently operated to heat the power unit of the electric automobile.
The invention has the beneficial effects that: the electric automobile power unit environment testing system has the advantages that the temperature rise test can be carried out on the electric automobile power unit, the temperature drop test can be carried out on the electric automobile power unit, the tolerance of the electric automobile power unit during temperature change is truly reproduced, testers can automatically control the on-off of each control valve according to a program controlled by a computer, so that the electric automobile power unit environment testing system can simulate real environment change and realize the function of repeated cycle test, a plurality of sets of heat exchangers can be simultaneously integrated on a water collector of the electric automobile power unit environment testing system to cool the electric automobile power unit, the function of simultaneously carrying out the environment test on a plurality of electric automobile power units is realized, the testing cost is reduced, and the testing efficiency is improved.
Drawings
FIG. 1 is a schematic structural diagram of an environmental testing system for a power unit of an electric vehicle according to a preferred embodiment of the invention.
In the figure, 1, a main pipeline component; 11. an inlet tube; 12. an outlet pipe; 13. a connecting pipe; 2. an electric vehicle power unit; 3. a heat supply unit; 31. a heater; 32. a liquid inlet of the heater; 33. a heater liquid outlet; 4. a cold quantity supply unit; 5. a circulation pump; 51. a liquid inlet of a circulating pump; 52. a liquid outlet of the circulating pump; 6. a water chiller; 61. a water outlet of the water chiller; 62. a water inlet of the water chiller; 7. a heat exchanger; 71. a water storage chamber; 72. a reservoir chamber; 73. a water outlet of the heat exchanger; 74. a water inlet of the heat exchanger; 75. a liquid outlet of the heat exchanger; 76. a liquid inlet of the heat exchanger; 8. a water collector; 81. a first water collection portion; 82. a second water collection portion; 83. a water collector water inlet; 84. a water outlet of the water collector; 91. a first control valve; 92. a second control valve; 93. a third control valve; 94. a fourth control valve; 95. a fifth control valve; 96. a sixth control valve; 97. a seventh control valve; 98. an eighth control valve; 99. a ninth control valve; 901. a first three-way pipe; 902. a second three-way pipe; 903. a third three-way pipe; 904. and a fourth three-way pipe.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Examples
The environmental testing system for the power unit of the electric vehicle as shown in fig. 1 comprises a main pipeline assembly 1, the main pipeline assembly comprises an inlet pipe 11 for flowing a liquid medium (not shown) to the power unit 2 of the electric vehicle and an outlet pipe 12 for flowing the liquid medium out of the power unit 2 of the electric vehicle, the environmental testing system for the power unit of the electric vehicle further comprises a heat supply unit 3 and a cold supply unit 4 which are arranged in parallel between the inlet pipe 11 and the outlet pipe 12 for respectively heating and cooling the liquid medium, and a circulating pump 5 which is connected in series with the main pipeline assembly 1 for providing power for the circulating flow of the liquid medium, the environmental testing system for the power unit of the electric vehicle comprises a first working state that the heat supply unit 3 operates alone to heat the flowing liquid medium and a second working state that the cold supply unit 4 operates alone to cool the flowing liquid medium Status.
Preferably, the cold energy supply unit 4 includes a water cooler 6 for providing cold water for the cold energy supply unit 4 and a heat exchanger 7 for transferring cold energy of the cold water provided by the water cooler 6 to the liquid medium, the water cooler 6 has a water cooler water outlet 61 and a water cooler water inlet 62, the heat exchanger 7 has a cold energy input end and a cold energy output end, the cold energy input end is a water storage chamber 71, the cold energy output end is a liquid storage chamber 72, the water storage chamber 71 has a heat exchanger water outlet 73 and a heat exchanger water inlet 74, and the cold energy supply unit 4 further includes a first circulation pipeline respectively connected to the water cooler water outlet 61 and the heat exchanger water inlet 74 and connected to the water cooler water inlet 62 and the heat exchanger water outlet 73 for circulating cold water between the water cooler 6 and the water storage chamber 71.
Preferably, the cold energy supply unit 4 further has a water collector 8 for storing cold water provided by the water cooler 6, and the water collector 8 includes a first water collecting portion 81 connected in series between the water cooler inlet 62 and the heat exchanger outlet 73 and a second water collecting portion 82 connected in series between the water cooler outlet 61 and the heat exchanger inlet 74.
In this embodiment, the water collector 8 is used for storing the prepared cold water, so that the speed of cold exchange between the cold water in the liquid storage chamber 71 and the cold water in the liquid storage chamber 72 is increased, and sufficient conditions are provided for simultaneously supplying cold to the plurality of electric vehicle power units 2.
Preferably, in this embodiment, a set of water collector inlet 83 and water collector outlet 84 corresponding to the heat exchanger water outlet 73 and the heat exchanger water inlet 74 respectively is disposed on the first water collecting portion 81 and the second water collecting portion 82.
Preferably, a first control valve 91 is arranged between the first water collecting portion 81 and the heat exchanger water outlet 73, a second control valve 92 is arranged between the second water collecting portion 82 and the heat exchanger water inlet 74, the first water collecting portion 81 and the second water collecting portion 82 are connected by a connecting pipe 13, and a third control valve 93 is arranged on the connecting pipe 13; in the first operating state, the first control valve 91 and the second control valve 92 are closed, and the third control valve 93 is open; in the second operating state, the first control valve 91 and the second control valve 92 are open, and the third control valve 93 is closed.
Preferably, the liquid storage chamber 72 has a heat exchanger liquid outlet 75 and a heat exchanger liquid inlet 76 for the liquid medium to be injected and guided out, the heat exchanger liquid outlet 75 is connected to the inlet pipe 11, and the outlet pipe 12 is connected to the heat exchanger liquid inlet 76 to form a second circulation pipeline for the liquid medium subjected to cooling capacity exchange to circulate between the electric vehicle power unit 2 and the liquid storage chamber 72, and the second circulation pipeline is provided with at least one control valve for controlling on and off of the second circulation pipeline.
Preferably, the heat supply unit 3 has a heater 31 for heating the liquid medium, the heater 31 has a heater inlet 32 and a heater outlet 33, the heater outlet 33 is connected to the inlet pipe 11, the outlet pipe 12 is connected to the heater inlet 32 to form a third circulation pipeline for circulating the liquid medium heated by the heater 31 between the electric vehicle power unit 2 and the heater 31, and the third circulation pipeline is provided with at least one control valve for controlling on/off of the third circulation pipeline.
Preferably, the circulating pump 5 has a circulating pump liquid inlet 51 and a circulating pump liquid outlet 52, the heat exchanger liquid outlet 75 is connected to the circulating pump liquid inlet 51, the circulating pump liquid outlet 52 is connected to the inlet pipe 11, the heat exchanger liquid inlet 76 is connected to the outlet pipe 12, a fourth control valve 94 and a first three-way pipe 901 are sequentially disposed between the heat exchanger liquid outlet 75 and the circulating pump liquid inlet 51, a second three-way pipe 902, a fifth control valve 95 and a third three-way pipe 903 are sequentially disposed between the circulating pump liquid outlet 52 and the inlet pipe 11, and a sixth control valve 96 and a fourth three-way pipe 904 are sequentially connected between the heat exchanger liquid inlet 76 and the outlet pipe 12.
The first tee joint 901 and the fourth tee joint 904 are connected, a seventh control valve 97 is arranged between the first tee joint 901 and the fourth tee joint 904, the heater liquid inlet 32 and the second tee joint 902 are connected, an eighth control valve 98 is arranged between the heater liquid inlet 32 and the second tee joint 902, the heater liquid outlet 33 and the third tee joint 903 are connected, and a ninth control valve 99 is arranged between the heater liquid outlet 33 and the third tee joint 903.
In other embodiments of this embodiment, the circulation pump 5 may also be connected to the outlet pipe 12, and the connection manner of other pipelines may be changed accordingly to form the second circulation pipeline and the third circulation pipeline, which are all within the protection scope of the present invention.
The electric automobile power unit environment testing system provided in this embodiment integrates a temperature rise testing system and a temperature drop testing system simultaneously, and the temperature rise testing system and the temperature drop testing system operate independently and do not influence each other, have both reappeared the dynamic change of electric automobile power unit 2 environment in actual operation, have realized again through the break-make of each control valve that the electric automobile power unit 2 heaies up and the independent test of cooling.
Preferably, the control valves mentioned in this embodiment are all electromagnetic valves, so that a tester can automatically control the on-off of each control valve according to a computer-controlled program, so as to realize the functions of simulating real environment changes and realizing repeated cycle tests of the electric vehicle power unit environment test system.
In other embodiments of the present invention, a plurality of sets of water collector water inlets 83 and water collector water outlets 84 are provided, which correspond to the heat exchanger water outlets 73 and the heat exchanger water inlets 74, respectively, so as to integrate two heat exchangers 7 on the water collector 8 at the same time and correspondingly form a plurality of second circulation pipelines and third circulation pipelines to realize a function of testing a plurality of electric vehicle power units 2 at the same time, thereby saving testing cost and improving testing efficiency.
Preferably, this embodiment provides an environment testing method for an electric vehicle power unit, where the method applies the environment testing system for an electric vehicle power unit to perform environment testing on the electric vehicle power unit 2, and the testing method includes the following steps:
a cold resistance test step, wherein the cold energy supply unit 4 operates independently to cool the power unit 2 of the electric automobile;
and a heat resistance test step, wherein the heat supply unit 3 is independently operated to heat the power unit 2 of the electric automobile.
Preferably, the embodiment provides an environment testing method for a power unit of an electric vehicle, the method applies the environment testing system for a power unit of an electric vehicle to perform environment testing on the power unit 2 of an electric vehicle, in a standby state, the water chiller 6 keeps a running state, and the third control valve 93 is in an open state, the testing method includes the following steps:
a cold resistance test step comprising:
s1, closing the third control valve 93, opening the first control valve 91 and the second control valve 92, and leading cold water into the water storage cavity 71 through the first circulating pipeline and performing cold exchange with the liquid medium in the liquid storage cavity 72;
s2, opening the fourth control valve 94, the control valve 95 and the sixth control valve 96, starting the circulating pump 5, and introducing the liquid medium cooled by the step S1 into the electric vehicle power unit 2;
and S3, testing the tolerance of the electric automobile power unit 2 when the temperature is reduced.
A heat resistance test step comprising:
s1, opening the seventh control valve 97, the eighth control valve 98 and the ninth control valve 99, starting the circulating pump 5 and the heater 31, and introducing the liquid medium heated by the heater 31 into the electric automobile power unit 2;
and S2, testing the tolerance of the electric automobile power unit 2 when the temperature rises.
Claims (10)
1. An environment testing system for a power unit of an electric automobile is characterized by comprising a main pipeline component, the main pipeline component is provided with an inlet pipe for the liquid medium to flow to the power unit of the electric automobile and an outlet pipe for the liquid medium to flow out of the power unit of the electric automobile, the environment testing system of the power unit of the electric automobile is also provided with a heat supply unit and a cold supply unit which are arranged between the inlet pipe and the outlet pipe in parallel and are used for respectively heating and cooling the liquid medium, and a circulating pump connected in series in the main pipeline assembly to provide power for the circulating flow of the liquid medium, the environment testing system for the power unit of the electric automobile is provided with a first working state in which the heat supply unit operates independently to heat the flowing liquid medium and a second working state in which the cold supply unit operates independently to cool the flowing liquid medium.
2. The environmental testing system for power units of electric vehicles of claim 1, the cold energy supply unit comprises a cold water machine for providing cold water for the cold energy supply unit and a heat exchanger for transferring the cold energy of the cold water provided by the cold water machine to the liquid medium, the water cooler is provided with a water inlet and a water outlet, the heat exchanger is provided with a cold input end and a cold output end, the cold input end is a water storage cavity, the cold output end is a liquid storage cavity, the water storage cavity is provided with a heat exchanger water inlet and a heat exchanger water outlet, the cold quantity supply unit also comprises a first circulation pipeline which is respectively connected with the water inlet of the water cooler and the water outlet of the heat exchanger and connected with the water outlet of the water cooler and the water inlet of the heat exchanger so as to supply cold water to circulate between the water cooler and the water storage chamber.
3. The electric vehicle power unit environment testing system of claim 2, wherein the cold energy supply unit further comprises a water collector for storing cold water provided by the water chiller, and the water collector comprises a first water collecting part connected in series between a water inlet of the water chiller and a water outlet of the heat exchanger and a second water collecting part connected in series between the water outlet of the water chiller and the water inlet of the heat exchanger.
4. The electric vehicle power unit environment testing system of claim 3, wherein at least one set of a water collector water outlet and a water collector water inlet corresponding to the heat exchanger water inlet and the heat exchanger water outlet are disposed on the first water collection portion and the second water collection portion.
5. The electric vehicle power unit environment testing system of claim 4, wherein a first control valve is disposed between the water collector water inlet and the heat exchanger water outlet, a second control valve is disposed between the water collector water outlet and the heat exchanger water inlet, the first water collecting portion and the second water collecting portion are connected by a connecting pipe, and a third control valve is disposed on the connecting pipe; in the first working state, the first control valve and the second control valve are closed, and the third control valve is opened; in the second operating state, the first control valve and the second control valve are open, and the third control valve is closed.
6. The electric vehicle power unit environment testing system of claim 5, wherein the liquid storage chamber has a heat exchanger liquid outlet and a heat exchanger liquid inlet for the liquid medium to be injected and guided out, the heat exchanger liquid outlet is connected to the inlet pipe, and the outlet pipe is connected to the heat exchanger liquid inlet to form a second circulation pipeline for the liquid medium subjected to cooling capacity exchange to circulate between the electric vehicle power unit and the liquid storage chamber, and at least one control valve is arranged on the second circulation pipeline to control the second circulation pipeline to be switched on and off.
7. The electric vehicle power unit environment testing system of claim 6, wherein the heat supplying unit has a heater for heating the liquid medium, the heater has a heater liquid outlet and a heater liquid inlet, the heater liquid outlet is connected to the inlet pipe, and the outlet pipe is connected to the heater liquid inlet to form a third circulation pipeline for circulating the liquid medium heated by the heater between the electric vehicle power unit and the heater, and at least one control valve is disposed on the third circulation pipeline to control on/off of the third circulation pipeline.
8. The electric vehicle power unit environment testing system of claim 7, wherein the circulating pump has a circulating pump inlet and a circulating pump outlet, the heat exchanger liquid outlet is connected to the circulating pump inlet, the circulating pump liquid outlet is connected to the inlet tube, the heat exchanger liquid inlet is connected to the outlet tube, a fourth control valve and a first three-way pipe are sequentially disposed between the heat exchanger liquid outlet and the circulating pump liquid inlet, a second three-way pipe, a fifth control valve and a third three-way pipe are sequentially disposed between the circulating pump liquid outlet and the inlet tube, and a sixth control valve and a fourth three-way pipe are sequentially connected between the heat exchanger liquid inlet and the outlet tube.
9. The electric vehicle power unit environmental testing system of claim 8, wherein the first tee pipe is connected with the fourth tee pipe and a seventh control valve is disposed between the first tee pipe and the fourth tee pipe, the heater inlet is connected with the second tee pipe and an eighth control valve is disposed between the heater inlet and the second tee pipe, the heater outlet is connected with the third tee pipe and a ninth control valve is disposed between the heater outlet and the third tee pipe.
10. An electric vehicle power unit environment testing method, which applies the electric vehicle power unit environment testing system of any one of claims 1-9 to perform environment testing on the electric vehicle power unit, the testing method comprising the following steps:
a cold resistance test step, wherein the cold supply unit operates independently to cool the power unit of the electric automobile;
and a heat resistance test step, wherein the heat supply unit is independently operated to heat the power unit of the electric automobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811395674.0A CN111207931A (en) | 2018-11-22 | 2018-11-22 | Environment testing system and environment testing method for power unit of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811395674.0A CN111207931A (en) | 2018-11-22 | 2018-11-22 | Environment testing system and environment testing method for power unit of electric automobile |
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| CN111207931A true CN111207931A (en) | 2020-05-29 |
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