CN214380260U - Auxiliary power supply device for automobile - Google Patents
Auxiliary power supply device for automobile Download PDFInfo
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- CN214380260U CN214380260U CN202021965507.8U CN202021965507U CN214380260U CN 214380260 U CN214380260 U CN 214380260U CN 202021965507 U CN202021965507 U CN 202021965507U CN 214380260 U CN214380260 U CN 214380260U
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The application provides an auxiliary power supply device of car, the device includes: the thermoelectric power generation module is arranged on the heat source and comprises a thermoelectric power generation chip set and an output terminal, wherein the thermoelectric power generation chip set is electrically connected with the output terminal and comprises at least one thermoelectric power generation chip, and the hot end of the thermoelectric power generation chip is in contact with the heat source; the radiator is arranged at the cold end of the thermoelectric generation chip; and a battery electrically connected to the output terminal. The device makes the hot junction and the cold junction of thermoelectric generation chip keep certain temperature difference to generate electricity, and the battery is connected with the output terminal electricity to the electric energy storage that produces the thermoelectric generation module is in the battery, and the used heat of recycle car engine adopts the battery storage electric energy to supply power for on-vehicle electrical equipment, reduces the use of traditional generator, and then improves the fuel efficiency of engine, reduces harmful gas and discharges.
Description
Technical Field
The application relates to the technical field of thermoelectric generation, in particular to an auxiliary power supply device of an automobile.
Background
The heat engine is a conversion device for converting heat energy into mechanical energy, theoretically, the maximum conversion efficiency eta of the heat engine is (Th-Tc)/Th, wherein Th represents the absolute temperature of working medium gas at the high-temperature end of the heat engine, and Tc represents the absolute temperature of the environment where the heat engine is located, and because Th > Tc is difficult to achieve in practical application, the heat engine efficiency is difficult to achieve very high, the generated heat (commonly called as waste heat) which cannot be used for doing work is considerable, the waste heat is usually difficult to be effectively utilized, and particularly for a mobile device such as an automobile, the waste heat can only be directly discharged into the environment along with channels such as exhaust gas and the like.
Since the thermal efficiency of an automobile engine is usually only 30-45%, it means that the heat energy released by the combustion of fuel in an internal combustion engine can not be utilized up to 60%, and the heat energy is wasted after being emitted to the environment. In order to fully utilize the chemical energy of fuel oil, various efforts have been made to improve the power conversion efficiency of the heat engine by continuously improving the performance of the heat engine, and to recover and utilize the waste heat of the engine by various technical means in order to obtain part of useful energy from the waste heat, thereby indirectly improving the fuel oil conversion efficiency.
A recovery method has been proposed in which water is heated by collecting waste heat of an engine to generate steam, and then a steam turbine is driven to generate electricity to obtain electric energy. The method has the disadvantages that water is required to be consumed to provide water vapor, and the automobile needs additional devices such as a water tank, a water supply pipeline, a vapor generator and the like, so that the weight, complexity and cost of the whole automobile are increased, and the method is not beneficial to popularization. The method of performing thermoelectric conversion by the thermoelectric effect and directly converting waste heat into electric energy for recovery seems to be more advantageous.
Since 1821 german scientist seebeck discovered the thermoelectric phenomenon, the thermoelectric phenomenon has been studied for nearly 200 years, and in recent years, the thermoelectric generation technology has been remarkably advanced as some thermoelectric materials with high thermoelectric conversion coefficient are discovered successively. Some semiconductor thermoelectric power generation chips with higher thermoelectric conversion efficiency and practicability are manufactured and are commercially used, and a new way is opened up for recycling waste heat of automobile engines. The thermoelectric power generation chip is a power generation device which directly converts heat energy into electric energy by utilizing a Seebeck effect, one ends of two thermoelectric semiconductor materials (P type and N type) of different types are connected by a conductor and are placed in a high-temperature environment, the other ends of the two thermoelectric semiconductor materials are open-circuited and are placed in a low-temperature environment, so that a thermoelectric monomer is formed, and because the hole concentration in the P type semiconductor and the electron concentration in the N type semiconductor are in gradient distribution along with the temperature, electrons and holes are diffused from the high-temperature end to the low-temperature end, so that the two semiconductors form a potential difference at the cold end, if electrodes are respectively led out from the cold end and a load is connected to form a loop, current is generated in the loop, and the principle of thermoelectric power generation is realized. A practical thermoelectric generator is generally formed by combining a plurality of thermoelectric cells in series or in parallel, and power can be generated only by keeping a certain temperature difference at the cold end and the hot end of the thermoelectric generator in use. An automobile engine is a device which burns fuel oil and converts heat energy into mechanical energy for output, generally the useful work generated by the automobile engine is less than 40% of the heat energy generated by burning the fuel oil, which means that 60% of the burning heat energy is wasted, if the energy can be recycled, the fuel oil efficiency of the automobile can be indirectly improved, the automobile engine contributes to energy conservation and emission reduction, and the automobile engine waste heat recycling device has the significance of engine waste heat recycling. The semiconductor thermoelectric generation chip has the characteristics of small volume, light weight and no transmission part, and is easy to integrate into an automobile to play a role.
The thermoelectric conversion efficiency of the current thermoelectric power generation chip reaches about 10 percent, and the thermoelectric power generation chip has practical value. However, in order to obtain a stable power output, it is necessary to maintain the temperature difference between the hot and cold surfaces, and therefore, it is necessary to continuously supply heat to the hot surface and reliably dissipate heat from the cold surface. The general method is to place the thermoelectric power generation device near the heat source of the engine to absorb heat, and to install a heat radiation fan on the radiator of the cold side of the thermoelectric pile to ensure that the heat at the cold side can be released to the environment as soon as possible. The power generation efficiency of the thermopile is reduced because a certain amount of electric energy is consumed to maintain the operation of the fan.
SUMMERY OF THE UTILITY MODEL
The main object of this application is to provide an auxiliary power supply device of car to solve the problem that the fuel efficiency of engine is low among the prior art.
In order to achieve the above object, according to one aspect of the present application, there is provided an auxiliary power supply apparatus for an automobile, the apparatus including: the thermoelectric power generation module is arranged on a heat source and comprises a thermoelectric power generation chip set and an output terminal, wherein the thermoelectric power generation chip set is electrically connected with the output terminal and comprises at least one thermoelectric power generation chip, and the hot end of the thermoelectric power generation chip is in contact with the heat source; the radiator is arranged at the cold end of the thermoelectric generation chip; and a battery electrically connected to the output terminal.
Optionally, the thermoelectric generation chip set comprises a plurality of thermoelectric generation chip strings connected in parallel, and the thermoelectric generation chip string comprises a plurality of thermoelectric generation chips connected in series.
Optionally, the radiator comprises a plurality of radiating fins, and the extending direction of the plurality of radiating fins is the same as the flowing direction of the air generated by the movement of the automobile.
Optionally, the heat source is an exhaust pipe, the exhaust pipe includes a thermoelectric generation section, the thermoelectric generation section includes two planar pipe walls, and the hot end of the thermoelectric generation chip is in contact with the planar pipe walls.
Optionally, the heat source is an engine radiator, and the hot end of the thermoelectric generation chip is in contact with a side plate of the engine radiator.
Optionally, the thermoelectric generation section further includes two curved pipe walls, and the apparatus includes: and the heat insulation cotton is positioned on the outer surface of the curved pipe wall and used for blocking the heat radiation of the curved pipe wall.
Optionally, the thermoelectric generation module further comprises: and the heat conducting plate is positioned between the hot end of the thermoelectric generation chip and the heat source and is respectively in contact with the hot end of the thermoelectric generation chip and the heat source.
Optionally, the apparatus further comprises: and the DC/DC conversion circuit is respectively electrically connected with the output terminal and the storage battery and is used for adjusting the output voltage of the temperature difference power generation module.
Optionally, the thermoelectric generation module further comprises: and the bracket is positioned between the heat source and the radiator and used for fixing the thermoelectric generation chip.
Optionally, the apparatus further comprises: and the fixing piece is respectively connected with the bracket and the heat source and is used for fixing the bracket on the heat source.
Use the technical scheme of this application, among the auxiliary power supply device of above-mentioned car, thermoelectric generation module installs on the heat source, including thermoelectric generation chipset and output terminal, thermoelectric generation chipset and output terminal electricity are connected, thermoelectric generation chipset includes at least one thermoelectric generation chip, the hot junction and the heat source contact setting of thermoelectric generation chip, the cold junction at thermoelectric generation chip is installed to the radiator, make the hot junction and the cold junction of thermoelectric generation chip keep certain temperature difference to generate electricity, the battery is connected with the output terminal electricity, thereby the electric energy storage that produces thermoelectric generation module is in the battery, recycle automobile engine's used heat, adopt the battery to store the electric energy and supply power for on-vehicle electrical equipment, reduce the use of traditional generator, and then improve the fuel efficiency of engine, reduce harmful gas and discharge.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 shows a schematic diagram of a thermoelectric generation module according to an embodiment of the present application;
FIG. 2 shows a schematic diagram of a thermoelectric generation circuit according to an embodiment of the present application;
FIG. 3 shows a schematic diagram of a thermoelectric generation segment and thermoelectric generation module and a heat sink according to the present application;
FIG. 4 illustrates an assembly schematic of a thermoelectric generation segment according to the present application with a thermoelectric generation module and a heat sink;
FIG. 5 shows a schematic diagram of an engine radiator and thermoelectric generation module and radiator according to the present application; and
FIG. 6 illustrates a schematic cross-sectional view of an engine radiator and thermoelectric generation module and radiator according to the present application.
Wherein the figures include the following reference numerals:
01. a thermoelectric generation section; 02. an engine radiator; 021. a water feeding tank; 022. a coolant inlet; 023. a condenser tube; 024. a heat sink; 025. a lower water tank; 026. a coolant outlet; 027. a side plate; 10. a thermoelectric generation module; 11. a thermoelectric generation chip set; 111. a thermoelectric generation core strip string; 1111. a thermoelectric generation chip; 12. an output terminal; 13. a support; 14. a heat conducting plate; 20. a heat sink; 30. a storage battery; 40. heat insulation cotton; 50. a DC/DC conversion circuit; 60. and a fixing member.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As described in the background of the invention, the fuel efficiency of the engine in the prior art is low due to the generation of a large amount of waste heat, and in order to solve the above problem, the present application provides an auxiliary power supply apparatus for a vehicle.
According to an embodiment of the present application, there is provided an auxiliary power supply apparatus for an automobile, as shown in fig. 1 to 6, the apparatus including:
the thermoelectric generation module 10 is installed on a heat source, and comprises a thermoelectric generation chipset 11 and an output terminal 12, wherein the thermoelectric generation chipset 11 is electrically connected with the output terminal 12, the thermoelectric generation chipset 11 comprises at least one thermoelectric generation chip 1111, and the hot end of the thermoelectric generation chip 1111 is in contact with the heat source;
a heat sink 20 installed at a cold end of the thermoelectric generation chip 1111;
the battery 30 is electrically connected to the output terminal 12.
Among the auxiliary power supply device of above-mentioned car, thermoelectric generation module installs on the heat source, including thermoelectric generation chipset and output terminal, thermoelectric generation chipset and output terminal electricity are connected, the thermoelectric generation chipset includes at least one thermoelectric generation chip, the hot junction and the heat source contact setting of thermoelectric generation chip, the cold junction at the thermoelectric generation chip is installed to the radiator, make the hot junction and the cold junction of thermoelectric generation chip keep certain temperature difference to generate electricity, the battery is connected with the output terminal electricity, thereby the electric energy storage that produces thermoelectric generation module is in the battery, recycle automobile engine's used heat, adopt the battery to store the electric energy and supply power for on-vehicle electrical equipment, reduce the use of traditional generator, and then improve the fuel efficiency of engine, reduce harmful gas and discharge.
In an embodiment of the present application, as shown in fig. 2, the thermoelectric generation chip set 11 includes a plurality of thermoelectric generation chip strings 111 connected in parallel, and the thermoelectric generation chip string 111 includes a plurality of thermoelectric generation chips 1111 connected in series. Specifically, the number of thermoelectric generation chips in the thermoelectric generation chip string is the same, and a person skilled in the art can select the number of thermoelectric generation chips in the thermoelectric generation chip string and the thermoelectric generation chip string to meet the requirements of different output voltages and currents.
In one embodiment of the present application, the heat sink includes a plurality of fins extending in the same direction as the air flow direction generated by the movement of the vehicle. Specifically, the radiating fins of the radiator are designed in a fin type mode, the extending direction of the radiating fins is consistent with the direction of air flow generated when a vehicle moves, heat flowing to the cold end of the thermoelectric generator can be quickly released into the air, and the effect similar to that of an additionally-installed radiating fan is achieved under the condition that electric power is not consumed.
In an embodiment of the present application, as shown in fig. 3, the heat source is an exhaust pipe, the exhaust pipe includes a thermoelectric generation section 01, the thermoelectric generation section 01 includes two planar pipe walls, and the hot end of the thermoelectric generation chip is in contact with the planar pipe walls. Specifically, the thermoelectric generation section 01 is of a special-shaped tubular metal structure with round connectors at two ends, a flat middle part and a hollow whole body, two planar pipe walls of the thermoelectric generation section 01 are respectively provided with the thermoelectric generation module 10 and the radiator 20, a hot end of a thermoelectric generation chip of the thermoelectric generation module 10 is in contact with the planar pipe walls, the radiator 20 is installed at a cold end of the thermoelectric generation chip, the planar pipe walls are heated when tail gas serving as a heat source flows through the thermoelectric generation section, a hot surface of the thermoelectric generation chip is heated through the planar pipe walls, temperature difference is established at two cold and hot ends of the thermoelectric generation chip to generate thermoelectric force, and electric energy can be output outwards.
It should be noted that after fuel oil burns in an automobile engine cylinder and pushes a piston to do work, exhaust gas is discharged to an exhaust pipe outside the cylinder in an exhaust stroke, a three-way catalyst is arranged at the front section (close to the engine) of the exhaust pipe, harmful gas in the exhaust pipe is oxidized and reduced into harmless carbon dioxide, water and nitrogen when the exhaust gas with higher temperature passes through the three-way catalyst, and the temperature difference power generation section is positioned between the three-way catalyst and a silencer so as to reduce the temperature loss of the front section as much as possible and ensure the purification effect of the exhaust gas.
In one embodiment of the present application, as shown in fig. 5 and 6, the heat source is an engine radiator 02, and the hot end of the thermoelectric generation chip is disposed in contact with a side plate 027 of the engine radiator. Specifically, the engine radiator 02 includes an upper water tank 021, a coolant inlet 022, a condenser pipe 023, a heat sink 024, a lower water tank 025, a coolant outlet 026 and a side plate 027, wherein the heat sink 024 is corrugated to improve heat dissipation effect, the coolant inlet 022 and the coolant outlet 026 are respectively connected to the engine coolant jacket, when the engine is in operation, a coolant pump pumps coolant into the upper water tank 021 through the coolant inlet 022, then sprays the coolant into the lower water tank 025 along the condenser pipe 023, and returns to the engine coolant jacket through the coolant outlet 026, a part of heat carried by the coolant passes through the heat sink 024 and is rapidly blown away by an engine fan, because the hot end of the thermoelectric generation chip is in contact with the side plate 027 of the engine radiator, the radiator 20 is installed at the cold end of the thermoelectric generation chip, and the other part of heat passes through the side plate 027 to heat the hot face of the thermoelectric generator chip, the temperature difference is established between the cold end and the hot end of the thermoelectric generator chip to generate thermoelectric force, and electric energy can be output externally.
In an embodiment of the present application, as shown in fig. 4, the thermoelectric generation section 01 further includes two curved pipe walls, the apparatus includes heat insulation cotton 40, the heat insulation cotton 40 is located on an outer surface of the curved pipe walls, and the heat insulation cotton 40 is used for blocking heat radiation of the curved pipe walls. Specifically, the thermal radiation of the curved pipe wall is blocked by the thermal insulation cotton 40, so that the heat loss is reduced, the heat of tail gas is prevented from directly radiating to the radiator, the radiating effect of the radiator is ensured, the temperature difference at the cold end and the hot end of the thermoelectric generator chip is improved, the heat recovery utilization rate is improved, and the fuel efficiency of the engine is further improved.
In an embodiment of the present application, as shown in fig. 4, the thermoelectric generation module 10 further includes a heat conducting plate 14, and the heat conducting plate 14 is located between the hot end of the thermoelectric generation chip and the heat source and is respectively disposed in contact with the hot end of the thermoelectric generation chip and the heat source. Specifically, the heat conducting plate 14 is in good contact with the hot end of the thermoelectric generation chip and the heat source, so that the heat conduction is more uniform, the temperature difference between the cold end and the hot end of each thermoelectric generation chip is basically the same, and the electric energy storage after the subsequent energy conversion is facilitated.
In an embodiment of the present invention, as shown in fig. 2, the apparatus further includes a DC/DC conversion circuit 50, the DC/DC conversion circuit 50 is electrically connected to the output terminal 12 and the battery 30, respectively, and the DC/DC conversion circuit 50 is configured to adjust an output voltage of the thermoelectric power generation module. Specifically, the temperature difference is established between the cold end and the hot end of the thermoelectric generator chip to generate the thermoelectric electromotive force E0＝(SB-SA)×(TH-TL) Wherein S isB、SARespectively the Seebeck coefficient, T, of two different semiconductor materials in the thermoelectric generation chipH-TLThe electromotive force E of the thermoelectric generation module is equal to nE for the temperature difference between the hot end and the cold end of the thermoelectric generation chip0N is the number of thermoelectric generator chips in a thermoelectric generator chip string, the thermoelectric generation module is equivalent to a battery with electromotive force E and internal resistance R, E, R changes along with the change of working temperature, in order to enable the thermoelectric battery to output maximum power, a DC/DC conversion circuit with a maximum power point tracking function is adopted to adjust the value of a load resistor R in real time, so that R is R, and the output power supply of the thermoelectric generation module reaches the maximum output power, namely the maximum output power PmaxFor example, the DC/DC converter circuit is an MPPT circuit.
In an embodiment of the present application, as shown in fig. 1 and 4, the thermoelectric generation module 10 further includes a bracket 13, the bracket 13 is located between the heat source and the heat sink 20, and the bracket 13 is used for fixing the thermoelectric generation chip. Specifically, the heat sink 20 has a groove, and the holder 13 is disposed in the groove such that the cold end of the thermoelectric generation chip fixed in the holder 13 is in contact with the heat sink 20.
In an embodiment of the present application, the apparatus further includes a fixing member, the fixing member is respectively connected to the bracket and the heat source, and the fixing member is configured to fix the bracket to the heat source. Specifically, the mount may be a bolt, for example, as shown in fig. 4, the thermoelectric generation module 10 and the radiator 20 are fixed to the planar pipe wall of the thermoelectric generation section 01 by a mount 60, and as shown in fig. 6, the thermoelectric generation module 10 and the radiator 20 are fixed to the side plate 027 of the engine radiator 02 by a mount 60.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
the utility model provides an among the auxiliary power supply device of car, thermoelectric generation module installs on the heat source, including thermoelectric generation chipset and output terminal, thermoelectric generation chipset and output terminal electricity are connected, the thermoelectric generation chipset includes at least one thermoelectric generation chip, the hot junction and the heat source contact setting of thermoelectric generation chip, the cold junction at the thermoelectric generation chip is installed to the radiator, make the hot junction and the cold junction of thermoelectric generation chip keep certain temperature difference to generate electricity, the battery is connected with the output terminal electricity, thereby the electric energy storage that produces the thermoelectric generation module is in the battery, recycle automobile engine's used heat, adopt the battery storage electric energy to supply power for on-vehicle electrical equipment, reduce the use of traditional generator, and then improve the fuel efficiency of engine, reduce harmful gas and discharge.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. An auxiliary power supply apparatus for an automobile, the apparatus comprising:
the thermoelectric power generation module is arranged on a heat source and comprises a thermoelectric power generation chip set and an output terminal, wherein the thermoelectric power generation chip set is electrically connected with the output terminal and comprises at least one thermoelectric power generation chip, and the hot end of the thermoelectric power generation chip is in contact with the heat source;
the radiator is arranged at the cold end of the thermoelectric generation chip;
the storage battery is electrically connected with the output terminal, the heat source is an exhaust pipe, the exhaust pipe comprises a temperature difference power generation section, the temperature difference power generation section comprises two plane pipe walls, and the hot end of the temperature difference power generation chip is in contact with the plane pipe walls.
2. The device of claim 1, wherein the thermoelectric generation chipset comprises a plurality of thermoelectric generation chip strings connected in parallel, the thermoelectric generation chip string comprising a plurality of the thermoelectric generation chips connected in series.
3. The apparatus of claim 1, wherein the heat sink comprises a plurality of fins extending in the same direction as the air flow generated by the movement of the vehicle.
4. The device of claim 1, wherein the heat source is an engine radiator, and the hot end of the thermoelectric generation chip is arranged in contact with a side plate of the engine radiator.
5. The apparatus of claim 1, wherein the thermoelectric generation section further comprises two curved tube walls, the apparatus comprising:
and the heat insulation cotton is positioned on the outer surface of the curved pipe wall and used for blocking the heat radiation of the curved pipe wall.
6. The apparatus of claim 1, wherein the thermoelectric generation module further comprises:
and the heat conducting plate is positioned between the hot end of the thermoelectric generation chip and the heat source and is respectively in contact with the hot end of the thermoelectric generation chip and the heat source.
7. The apparatus of claim 1, further comprising:
and the DC/DC conversion circuit is respectively electrically connected with the output terminal and the storage battery and is used for adjusting the output voltage of the temperature difference power generation module.
8. The apparatus of claim 1, wherein the thermoelectric generation module further comprises:
and the bracket is positioned between the heat source and the radiator and used for fixing the thermoelectric generation chip.
9. The apparatus of claim 8, further comprising:
and the fixing piece is respectively connected with the bracket and the heat source and is used for fixing the bracket on the heat source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021965507.8U CN214380260U (en) | 2020-09-09 | 2020-09-09 | Auxiliary power supply device for automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021965507.8U CN214380260U (en) | 2020-09-09 | 2020-09-09 | Auxiliary power supply device for automobile |
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| CN214380260U true CN214380260U (en) | 2021-10-08 |
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| CN202021965507.8U Active CN214380260U (en) | 2020-09-09 | 2020-09-09 | Auxiliary power supply device for automobile |
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