CN114374298A - Cooling system of electric drive system and vehicle - Google Patents
Cooling system of electric drive system and vehicle Download PDFInfo
- Publication number
- CN114374298A CN114374298A CN202210055944.3A CN202210055944A CN114374298A CN 114374298 A CN114374298 A CN 114374298A CN 202210055944 A CN202210055944 A CN 202210055944A CN 114374298 A CN114374298 A CN 114374298A
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- CN
- China
- Prior art keywords
- oil
- cooling
- cooling system
- motor
- recovery device
- 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.)
- Granted
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 75
- 238000011084 recovery Methods 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 118
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910002899 Bi2Te3 Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention provides a cooling system of an electric drive system and a vehicle, and relates to the technical field of vehicle cooling systems. The cooling system of the electric drive system comprises an energy recovery device, a power battery, an oil cooling loop, a motor, an oil pump and an oil tank, wherein the motor, the oil pump and the oil tank are arranged on the oil cooling loop, and the oil cooling loop is used for cooling the motor. One end of the energy recovery device is connected with the oil pump, the other end of the energy recovery device is connected with the power battery, and the energy recovery device is configured to convert heat energy absorbed by oil in the oil cooling loop into electric energy so as to charge the power battery. Above-mentioned technical scheme can retrieve the heat that the motor produced to energy utilization has been improved.
Description
Technical Field
The invention relates to the technical field of vehicle cooling systems, in particular to a cooling system of an electric drive system and a vehicle.
Background
The electric drive assembly is used as a core part of a new energy automobile, the performance requirement of the electric drive assembly is higher and higher, and one of the limits of the improvement of the performance of the electric drive assembly is the heating and cooling problem of the electric drive. The cooling effect of the motor directly influences the power and torque output of the motor, and further influences the power economy of the whole vehicle.
The best cooling effect of the existing motor is to arrange a motor coil winding in an independent cavity of a motor shell, fill the cavity with oil and externally connect an oil cooler for cooling. The disadvantage of this scheme is that the heat that the motor coil produced still gets rid of as the waste product of electric drive system, does not recycle, causes the energy waste of system to the cost of electric drive system has been improved indirectly.
Disclosure of Invention
The object of the first aspect of the present invention is to provide a cooling system for an electric drive system, which solves the technical problem in the prior art that the heat generated by the electric motor cannot be recovered.
It is an object of a second aspect of the invention to provide a vehicle having a cooling system of an electric drive system as described above.
According to the object of the first aspect of the invention, the invention further provides a cooling system of an electric drive system, which comprises an energy recovery device, a power battery, an oil-cooling loop, and a motor, an oil pump and an oil tank which are arranged on the oil-cooling loop, wherein the oil-cooling loop is used for cooling the motor;
one end of the energy recovery device is connected with the oil pump, the other end of the energy recovery device is connected with the power battery, and the energy recovery device is configured to convert heat energy absorbed by oil liquid in the oil cooling loop into electric energy so as to charge the power battery.
Optionally, the energy recovery device comprises:
the shell is provided with an oil inlet and an oil outlet, the oil inlet is connected with the oil pump, and the oil outlet is communicated with the oil tank;
the thermoelectric converter is at least partially arranged inside the shell and is provided with a hot end and a cold end, the hot end is communicated with the oil inlet, and the cold end is connected with the power battery.
Optionally, the method further comprises:
and the controller is connected with the oil pump, the oil inlet and the oil outlet and is used for controlling the opening and closing of the oil pump, the oil inlet and the oil outlet.
Optionally, the controller is configured to control the oil pump and the oil inlet to open when the temperature of the oil in the oil cooling circuit is greater than a first preset temperature; and when the temperature of oil in the oil cooling circuit is less than or equal to the first preset temperature, the oil pump and the oil inlet are controlled to be closed.
Optionally, the controller is further configured to control the oil outlet to be opened when the temperature of the oil in the housing is less than a second preset temperature, so that the cooled oil flows back to the oil tank, and the second preset temperature is less than the first preset temperature.
Optionally, the motor includes a motor housing defining a sealed cavity, a motor stator and a coil disposed in the sealed cavity, and oil is filled in the sealed cavity to remove heat generated by the motor stator and the coil by the oil.
Optionally, the cold side of the thermoelectric converter is located outside the enclosure.
Optionally, an exhaust valve is arranged on the oil tank.
Optionally, a semiconductor thermoelectric material is disposed within the thermoelectric converter.
According to an object of a second aspect of the present invention, there is also provided a vehicle equipped with the cooling system described above.
The cooling system of the electric drive system comprises an energy recovery device, a power battery, an oil cooling loop, a motor, an oil pump and an oil tank, wherein the motor, the oil pump and the oil tank are arranged on the oil cooling loop, and the oil cooling loop is used for cooling the motor. One end of the energy recovery device is connected with the oil pump, the other end of the energy recovery device is connected with the power battery, and the energy recovery device is configured to convert heat energy absorbed by oil in the oil cooling loop into electric energy so as to charge the power battery. Above-mentioned technical scheme can retrieve the heat that the motor produced to energy utilization has been improved.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic block diagram of a cooling system of an electric drive system according to one embodiment of the present invention;
FIG. 2 is a schematic block diagram of an energy recovery device of the cooling system of the electric drive system of FIG. 1.
Reference numerals:
100-cooling system of electric drive system, 10-energy recovery device, 20-power battery, 30-oil cooling loop, 40-controller, 31-motor, 32-oil tank, 33-oil pump, 321-exhaust valve, 11-shell, 12-thermoelectric converter, 122-hot end, 121-cold end, 111-oil inlet, and 112-oil outlet.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
FIG. 1 is a schematic block diagram of a cooling system 100 of an electric drive system in accordance with one embodiment of the invention. As shown in fig. 1, in a specific embodiment, a cooling system 100 of an electric drive system includes an energy recovery device 10, a power battery 20, an oil cooling circuit 30, and an electric motor 31, an oil pump 33, and an oil tank 32 disposed on the oil cooling circuit 30, and the oil cooling circuit 30 is used for cooling the electric motor 31. The energy recovery device 10 is connected to the oil pump 33 at one end and to the power battery 20 at the other end, and the energy recovery device 10 is configured to convert the thermal energy absorbed by the oil in the oil cooling circuit 30 into electric energy to charge the power battery 20.
The embodiment adopts the energy recovery device 10, and can recover the heat generated by the motor 31, thereby maximally improving the energy utilization rate of the electric drive system.
FIG. 2 is a schematic block diagram of the energy recovery device 10 of the cooling system 100 of the electric drive system of FIG. 1. As shown in fig. 2, in this embodiment, the energy recovery apparatus 10 includes a housing 11 and a thermoelectric converter 12, the housing 11 has an oil inlet 111 and an oil outlet 112, the oil inlet 111 is connected to an oil pump 33, and the oil outlet 112 is communicated with an oil tank 32. The thermoelectric converter 12 is at least partially arranged inside the shell 11, the thermoelectric converter has a hot end 122 and a cold end 121, the hot end 122 is communicated with the oil inlet 111, and the cold end 121 is connected with the power battery 20. This embodiment pumps the hot oil of the oil cooling system into the housing 11 of the energy recovery device 10 by means of an oil pump 33, and the lubricating oil is pumped by means of a heat energy converterThe heat energy is converted into electric energy and output to the power battery 20. In one embodiment, cold side 121 of thermoelectric converter 12 is located outside of housing 11. The thermoelectric converter 12 is internally provided with a semiconductor thermoelectric material, which is a novel functional material capable of directly converting heat energy into electric energy, and does not need other mechanical transmission assistance, and the carriers of the thermoelectric material drift directionally from the hot end 122 to the cold end 121 under the driving of thermoelectric potential to form current, so as to supply power to the power battery 20. Wherein the semiconductor thermoelectric material adopts Bi2Te3And the like.
In this embodiment, the cooling system 100 of the electric drive system further includes a controller 40 connected to the oil pump 33, the oil inlet 111, and the oil outlet 112 for controlling opening and closing of the oil pump 33, the oil inlet 111, and the oil outlet 112.
Specifically, the controller 40 is configured to control the oil pump 33 and the oil inlet 111 to be opened when the temperature of the oil in the oil-cooling circuit 30 is greater than a first preset temperature; and controlling the oil pump 33 and the oil inlet 111 to be closed when the temperature of the oil liquid in the oil cooling circuit 30 is less than or equal to a first preset temperature. The controller 40 is further configured to control the oil outlet 112 to be opened when the temperature of the oil in the housing 11 is less than a second preset temperature, which is less than the first preset temperature, so that the cooled oil flows back to the oil tank 32. The oil cooling circuit 30 is provided with a first oil temperature sensor for detecting the temperature of the oil in the oil cooling circuit 30. A second oil temperature sensor is arranged in the shell 11 and used for detecting the temperature of oil in the shell 11. In this embodiment, not only can the thermoelectric converter 12 convert the heat energy of the oil into electric energy to be output to the power battery 20, but also the cooled oil can flow back to the oil cooling loop 30 to continue cooling the motor 31, and the energy recovery device 10 is used to replace a radiator. Here, the first preset temperature is determined according to the optimal operating point temperature of the motor 31. For example, in the optimal operating point temperature range a to B of the motor 31, the first preset temperature is set as B, that is, the temperature signal of the first oil temperature sensor. The controller 40 controls the oil pump 33 to start pumping oil from the oil cooling circuit 30 when the oil pump 33 is started based on the temperature signal of the first oil temperature sensor, and the energy recovery device 10 starts to operate, so that the temperature of the oil liquid in the oil cooling circuit 30 does not exceed the optimal temperature point. Meanwhile, the controller 40 can control the opening of the oil outlet 112 according to a signal of the second oil temperature sensor, which is equivalent to controlling the temperature of the return oil, that is, when the temperature of the oil in the housing 11 is reduced below B, the oil outlet 112 is opened, and the oil is allowed to flow back to the oil tank 32; otherwise, the oil outlet 112 is closed, the recovery device can continue to generate power, and oil does not flow back.
In this embodiment, the motor 31 includes a motor housing defining a sealed cavity, a motor stator and a coil disposed in the sealed cavity, and the sealed cavity is filled with oil to remove heat generated by the motor stator and the coil. The sealed cavity takes oil from the oil tank 32, an exhaust valve 321 is arranged on the oil tank 32, and the internal pressure and the external pressure of the sealed cavity can be balanced by arranging the exhaust valve 321.
The present invention also provides a vehicle equipped with the cooling system 100 described above. The cooling system 100 need not be described in detail herein.
The conventional technology is limited by the resistivity of the current motor coil, and generates heat during the operation of the motor 31, thereby causing the performance of the motor 31 to be reduced, and the motor 31 cannot support the function thereof, i.e., power and torque output, and generally adopts lubricating oil for cooling, which causes a large amount of heat loss and waste. Adopt ordinary external oil cooler and whole car cooling water to interact simultaneously, can't make all coils of motor 31 carry out effectual cooling, have local high temperature dead point, the cooling effect is relatively poor and efficiency is lower. This embodiment adopts energy recuperation device 10, through the temperature monitoring of oil cold sensor, makes the highest oil temperature control of motor coil in motor 31 best operating area, can reduce motor 31's damage to minimum, recycles the heat that motor 31 produced simultaneously, charges for power battery 20, has realized the maximize to the energy utilization of whole electric drive system, has prolonged power battery 20's life-span.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. The cooling system of the electric drive system is characterized by comprising an energy recovery device, a power battery, an oil cooling loop, a motor, an oil pump and an oil tank, wherein the motor, the oil pump and the oil tank are arranged on the oil cooling loop;
one end of the energy recovery device is connected with the oil pump, the other end of the energy recovery device is connected with the power battery, and the energy recovery device is configured to convert heat energy absorbed by oil liquid in the oil cooling loop into electric energy so as to charge the power battery.
2. The cooling system of claim 1, wherein the energy recovery device comprises:
the shell is provided with an oil inlet and an oil outlet, the oil inlet is connected with the oil pump, and the oil outlet is communicated with the oil tank;
the thermoelectric converter is at least partially arranged inside the shell and is provided with a hot end and a cold end, the hot end is communicated with the oil inlet, and the cold end is connected with the power battery.
3. The cooling system of claim 2, further comprising:
and the controller is connected with the oil pump, the oil inlet and the oil outlet and is used for controlling the opening and closing of the oil pump, the oil inlet and the oil outlet.
4. The cooling system according to claim 3,
the controller is configured to control the oil pump and the oil inlet to be opened when the temperature of oil in the oil cooling circuit is greater than a first preset temperature; and when the temperature of oil in the oil cooling circuit is less than or equal to the first preset temperature, the oil pump and the oil inlet are controlled to be closed.
5. The cooling system according to claim 4,
the controller is further configured to control the oil outlet to be opened when the temperature of the oil in the shell is lower than a second preset temperature, so that the cooled oil flows back to the oil tank, and the second preset temperature is lower than the first preset temperature.
6. The cooling system of claim 4, wherein the motor includes a motor housing defining a sealed cavity, a motor stator and a coil disposed within the sealed cavity, and wherein the sealed cavity contains oil to remove heat generated by the motor stator and the coil with the oil.
7. The cooling system according to claim 2,
the cold side of the thermoelectric converter is located outside the housing.
8. The cooling system according to claim 1,
and an exhaust valve is arranged on the oil tank.
9. The cooling system according to claim 2,
the thermoelectric converter is internally provided with a semiconductor thermoelectric material.
10. A vehicle, characterized in that the vehicle is equipped with a cooling system according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210055944.3A CN114374298B (en) | 2022-01-18 | 2022-01-18 | Cooling system of electric drive system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210055944.3A CN114374298B (en) | 2022-01-18 | 2022-01-18 | Cooling system of electric drive system and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114374298A true CN114374298A (en) | 2022-04-19 |
| CN114374298B CN114374298B (en) | 2024-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210055944.3A Active CN114374298B (en) | 2022-01-18 | 2022-01-18 | Cooling system of electric drive system and vehicle |
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| Country | Link |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005064229A (en) * | 2003-08-12 | 2005-03-10 | Nikon Corp | Electromagnetic actuator cooling device, stage device, and exposure system |
| CN201797411U (en) * | 2010-08-31 | 2011-04-13 | 付强 | Motor cooling structure |
| CN103161694A (en) * | 2011-12-19 | 2013-06-19 | 陕西科林能源发展股份有限公司 | Geothermal power generation device |
| CN203482017U (en) * | 2013-06-28 | 2014-03-12 | 殷天明 | Direct cooling system for motor winding coil |
| CN104201406A (en) * | 2014-09-12 | 2014-12-10 | 湖北工业大学 | Device and method for cooling large-power fuel cell system through thermoelectric conversion technology |
| CN104393791A (en) * | 2014-12-17 | 2015-03-04 | 湖北工业大学 | Automobile exhaust-gas temperature difference power-generation device using both medium-temperature and low-temperature thermoelectric devices |
| CN206903962U (en) * | 2017-07-06 | 2018-01-19 | 娄丽莎 | A kind of intelligent hydraulic fuel tank |
| CN109763880A (en) * | 2019-02-20 | 2019-05-17 | 李良杰 | Engine exhaust heat converts collection system |
| CN110714815A (en) * | 2018-07-12 | 2020-01-21 | 通用汽车环球科技运作有限责任公司 | Thermoelectric module for use in a vehicle system |
| CN111357174A (en) * | 2017-05-10 | 2020-06-30 | 雷诺股份公司 | System for oil cooling for an electric machine |
| CN112186972A (en) * | 2019-07-03 | 2021-01-05 | 保时捷股份公司 | Drive train for a motor vehicle and motor vehicle |
| CN113530704A (en) * | 2021-06-04 | 2021-10-22 | 武汉理工大学 | Thermoelectric conversion system for recovering waste heat in engine cooling water and tail gas |
-
2022
- 2022-01-18 CN CN202210055944.3A patent/CN114374298B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005064229A (en) * | 2003-08-12 | 2005-03-10 | Nikon Corp | Electromagnetic actuator cooling device, stage device, and exposure system |
| CN201797411U (en) * | 2010-08-31 | 2011-04-13 | 付强 | Motor cooling structure |
| CN103161694A (en) * | 2011-12-19 | 2013-06-19 | 陕西科林能源发展股份有限公司 | Geothermal power generation device |
| CN203482017U (en) * | 2013-06-28 | 2014-03-12 | 殷天明 | Direct cooling system for motor winding coil |
| CN104201406A (en) * | 2014-09-12 | 2014-12-10 | 湖北工业大学 | Device and method for cooling large-power fuel cell system through thermoelectric conversion technology |
| CN104393791A (en) * | 2014-12-17 | 2015-03-04 | 湖北工业大学 | Automobile exhaust-gas temperature difference power-generation device using both medium-temperature and low-temperature thermoelectric devices |
| CN111357174A (en) * | 2017-05-10 | 2020-06-30 | 雷诺股份公司 | System for oil cooling for an electric machine |
| CN206903962U (en) * | 2017-07-06 | 2018-01-19 | 娄丽莎 | A kind of intelligent hydraulic fuel tank |
| CN110714815A (en) * | 2018-07-12 | 2020-01-21 | 通用汽车环球科技运作有限责任公司 | Thermoelectric module for use in a vehicle system |
| CN109763880A (en) * | 2019-02-20 | 2019-05-17 | 李良杰 | Engine exhaust heat converts collection system |
| CN112186972A (en) * | 2019-07-03 | 2021-01-05 | 保时捷股份公司 | Drive train for a motor vehicle and motor vehicle |
| CN113530704A (en) * | 2021-06-04 | 2021-10-22 | 武汉理工大学 | Thermoelectric conversion system for recovering waste heat in engine cooling water and tail gas |
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| Publication number | Publication date |
|---|---|
| CN114374298B (en) | 2024-01-23 |
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Effective date of registration: 20230301 Address after: No. 99, Beihui Road, Huishan Industrial Transformation Cluster, Wuxi City, Jiangsu Province, 214181 Applicant after: Wuxi Xingqu Technology Co.,Ltd. Applicant after: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. Address before: 310051 No. 1760, Jiangling Road, Hangzhou, Zhejiang, Binjiang District Applicant before: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. Applicant before: NINGBO GEELY ROYAL ENGINE COMPONENTS Co.,Ltd. Applicant before: Aurora Bay Technology Co.,Ltd. |
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