CN108711588B - High-efficiency thermoelectric module with multi-stage temperature regulating layers - Google Patents
High-efficiency thermoelectric module with multi-stage temperature regulating layers Download PDFInfo
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- CN108711588B CN108711588B CN201810375674.8A CN201810375674A CN108711588B CN 108711588 B CN108711588 B CN 108711588B CN 201810375674 A CN201810375674 A CN 201810375674A CN 108711588 B CN108711588 B CN 108711588B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N19/00—Integrated devices, or assemblies of multiple devices, comprising at least one thermoelectric or thermomagnetic element covered by groups H10N10/00 - H10N15/00
- H10N19/101—Multiple thermocouples connected in a cascade arrangement
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
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- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/10—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
- H10N10/17—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the structure or configuration of the cell or thermocouple forming the device
Abstract
The invention relates to a high-efficiency thermoelectric module with a multi-stage temperature regulating layer, which comprises a plurality of temperature regulating layers and temperature regulating layers among the temperature regulating layers, wherein the plurality of temperature regulating layers are sequentially arranged according to a temperature gradient; the temperature adjusting layer comprises two temperature adjusting layer substrates, and a lattice structure composed of metal materials is arranged between the two temperature adjusting layer substrates; the temperature of the temperature layer is determined by the temperature material of the PN pair in the functional layer between the upper substrate layer and the lower substrate layer of the temperature layer. The invention meets the requirements of different working environments through the selection and the assembly of different stages. The thermoelectric material capable of achieving the optimal thermoelectric performance in the temperature range is used in different temperature sections, and the overall efficiency of the thermoelectric module is improved. The temperature adjusting layer is arranged between the high-temperature layer and the middle-temperature layer, and the temperature adjusting layers are arranged on the middle-temperature layer and the low-temperature layer, so that the working temperature of each stage of thermoelectric material is in a temperature range capable of exerting the optimal thermoelectric performance of the thermoelectric material, and the overall efficiency of the thermoelectric module is improved.
Description
Technical Field
The invention belongs to the field of thermoelectric modules, and relates to a high-efficiency thermoelectric module with a multi-stage temperature regulating layer.
Background
In thermoelectric modules according to the prior art, such as the thermoelectric module described in CN102308400A, segmented thermoelectric legs use high temperature materials on the hot side of the leg and low temperature materials on the cold side of the leg, thereby improving the overall efficiency of the thermoelectric module. As for thermoelectric materials, there can be divided into three major categories of low-temperature, medium-temperature and high-temperature thermoelectric materials. The temperature ranges for different types of thermoelectric materials to perform their optimal thermoelectric performance are different. The use of different thermoelectric materials in different temperature ranges can improve the efficiency of the thermoelectric module. In the conventional thermoelectric module, a multi-stage structure is employed to improve the efficiency of the thermoelectric module. However, some of the conventional multi-stage structures do not use different kinds of thermoelectric materials in different temperature ranges; some thermoelectric modules use different types of thermoelectric materials in different temperature ranges, but no effective measure is taken to ensure that the operating temperature of each stage of thermoelectric material in the thermoelectric module is within the temperature range of the optimal performance.
Disclosure of Invention
Technical problem to be solved
In order to avoid the defects of the prior art, the invention provides a high-efficiency thermoelectric module with a multi-stage temperature regulating layer, which overcomes the defect that the working temperature of each stage of thermoelectric material of the thermoelectric module is in the optimal performance temperature range due to the lack of effective measures in the conventional multi-stage structure.
Technical scheme
A high-efficiency thermoelectric module with a plurality of temperature-regulating layers is characterized by comprising a plurality of temperature-regulating layers and temperature-regulating layers among the temperature-regulating layers, wherein the plurality of temperature-regulating layers are sequentially arranged according to a temperature gradient; the temperature adjusting layer comprises two temperature adjusting layer substrates, and a lattice structure composed of metal materials is arranged between the two temperature adjusting layer substrates; the temperature layer comprises an upper substrate layer 6, a lower substrate layer 8 and a functional layer 7 arranged between the two layers; the functional layer 7 comprises two layers of conductive electrodes 9, a PN pair 10 and a heat insulation support plate 11; the two-layer conductive electrode 9 is positioned above and below the plurality of PN pairs 10 and is connected with the plurality of PN pairs 10 in a series connection mode, and the two-layer conductive electrode 9 and the plurality of PN pairs 10 are embedded in the heat insulation support plate 11; the temperature of the temperature layer is determined by the temperature material used for the PN pair 10.
The multilayer temperature layer is a high temperature layer 1, a medium temperature layer 3 or a low temperature layer 5; the PN pairs 10 in the high-temperature layer 1 are made of high-temperature thermoelectric materials; the PN pairs 10 in the middle temperature layer 3 adopt middle temperature thermoelectric materials; the PN pairs 10 in the low-temperature layer 5 adopt low-temperature thermoelectric materials.
The high-temperature layer 1 is divided into a plurality of high-temperature layers, and the temperature of the high-temperature thermoelectric materials of the PN pairs 10 in each high-temperature layer is different.
The medium temperature layer 3 is divided into a plurality of medium temperature layers, and the medium temperature thermoelectric materials of the PN pairs 10 in each medium temperature layer have different temperatures.
The low-temperature layer 5 is divided into a plurality of low-temperature layers, and the temperature of the low-temperature thermoelectric materials of the PN pairs 10 in each low-temperature layer is different.
The lattice structure in the middle of the two temperature adjusting layer substrates comprises a pyramid lattice structure or a three-dimensional Kagome lattice structure.
The working temperature of the high-temperature thermoelectric material is higher than 1000K.
The working temperature range of the medium-temperature thermoelectric material is 373K-1000K.
The working temperature range of the temperature of the low-temperature thermoelectric material is 373K or less.
Advantageous effects
The invention provides a high-efficiency thermoelectric module with a multi-stage temperature regulating layer, which comprises a plurality of temperature regulating layers and temperature regulating layers among the temperature regulating layers, wherein the plurality of temperature regulating layers are sequentially arranged according to a temperature gradient; the temperature adjusting layer comprises two temperature adjusting layer substrates, and a lattice structure composed of metal materials is arranged between the two temperature adjusting layer substrates; the temperature of the temperature layer is determined by the temperature material of the PN pair in the functional layer between the upper substrate layer and the lower substrate layer of the temperature layer.
The invention has the beneficial effects that:
1. the multi-stage thermoelectric module adopted by the invention realizes modular encapsulation of different stages, and meets the requirements of different working environments through selection and assembly of different stages.
2. The multi-stage thermoelectric module adopted by the invention can use the thermoelectric material which can achieve the best thermoelectric performance in the temperature range for different temperature sections, thereby improving the overall efficiency of the thermoelectric module.
3. The temperature adjusting layer is arranged between the high-temperature layer and the middle-temperature layer, and the temperature adjusting layers are arranged on the middle-temperature layer and the low-temperature layer, so that the working temperature of each stage of thermoelectric material is in a temperature range capable of exerting the optimal thermoelectric performance of the thermoelectric material, and the overall efficiency of the thermoelectric module is improved.
Drawings
FIG. 1 is a schematic view of the overall construction of a thermoelectric module according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a temperature layer structure;
FIG. 3 is a structural diagram of a temperature control layer of a pyramid lattice structure;
FIG. 4 is a structural diagram of a temperature control layer of a three-dimensional Kagome structure
In the figure, 1-high temperature layer; 2-high and medium temperature adjusting layer; 3-middle temperature layer; 4-medium and low temperature adjusting layer; 5-a low temperature layer; 6-upper substrate layer; 7-a functional layer; 8-lower substrate layer; 9-a conductive electrode; a 10-PN pair; 11-thermally insulating support material; 12-an upper temperature-regulating layer substrate; 13-lattice structure; 14-lower temperature regulating layer substrate.
Detailed Description
The invention will now be further described with reference to the following examples and drawings:
this example
Comprises three stages of a high-temperature layer 1, a medium-temperature layer 3 and a low-temperature layer 5, wherein a high-medium temperature regulating layer 2 is arranged between the high-temperature layer and the medium-temperature layer, and a medium-low temperature regulating layer 4 is arranged between the medium-temperature layer and the low-temperature layer; each of the high temperature layer 1, the medium temperature layer 3, and the low temperature layer 5 is composed of three layers of an upper substrate layer 6, a functional layer 7, and a lower substrate layer 8.
Preferably, the thermoelectric module adopts a multi-stage structure, comprises three stages, namely a high-temperature layer 1, an intermediate-temperature layer 3 and a low-temperature layer 5, and sequentially comprises the high-temperature layer 1, the high-intermediate temperature-regulating layer 2, the intermediate-temperature layer 3, the intermediate-low temperature-regulating layer 4 and the low-temperature layer 5 from top to bottom.
Preferably, each of the thermoelectric module high temperature layer 1, the intermediate temperature layer 3 and the low temperature layer 5 is composed of three layers of an upper substrate layer 6, a functional layer 7 and a lower substrate layer 8.
Preferably, the functional layers include a PN pair 10, a conductive electrode 9, and a heat insulating support material 11.
Preferably, a plurality of PN pairs 10 in the functional layer are connected in series by the conductive electrode 9.
Fig. 1 is a schematic view showing an overall structure of a thermoelectric module, and referring to fig. 1, the thermoelectric module of the present invention includes three stages, i.e., a high temperature layer 1, an intermediate temperature layer 3, and a low temperature layer 5, wherein a high and intermediate temperature control layer 2 is disposed between the high temperature layer and the intermediate temperature layer, and a medium and low temperature control layer 4 is disposed between the intermediate temperature layer and the low temperature layer, and the high temperature layer 1, the high and intermediate temperature control layer 2, the intermediate temperature layer 3, the medium and low temperature control layer 4, and the low temperature layer 5 are sequentially disposed from top to bottom. The high-temperature layer 1, the medium-temperature layer 3 and the low-temperature layer 5 are respectively positioned in a high-temperature section, a medium-temperature section and a low-temperature section.
Fig. 2 is a schematic structural view of a high temperature layer, and referring to fig. 2, each of the high temperature layer 1, the medium temperature layer 3, and the low temperature layer 5 of the thermoelectric module is composed of three layers, i.e., an upper substrate layer 6, a functional layer 7, and a lower substrate layer 8. The solar cell comprises an upper substrate layer 6, a functional layer 7 and a lower substrate layer 8 from top to bottom in sequence, wherein the functional layer comprises a PN pair 10, a conductive electrode 9 and a heat insulation support plate 11, the PN pair 10 and the conductive electrode 9 are embedded in the heat insulation support plate, and a plurality of PN pairs 10 are connected in series through the conductive electrode 9. The upper substrate layer 6 and the lower substrate layer 8 mainly function as a support and protection function layer; the PN pairs 10 convert heat energy into electric energy, and the conductive electrodes 9 connect the PN pairs 10 in series to improve output voltage; the heat insulation support plate 11 insulates heat to maintain a large temperature difference between both ends of the PN pair 10, and supports and protects the PN pair 10 and the conductive electrode 9. The high-temperature layer 1, the medium-temperature layer 3 and the low-temperature layer 5 have the same three-layer structure. The upper substrate layer and the lower substrate layer of the high-temperature layer 1, the medium-temperature layer 3 and the low-temperature layer 5 are all made of aluminum oxide materials; the functional layer middle partition supporting plates of the high-temperature layer 1, the medium-temperature layer 3 and the low-temperature layer 5 are all made of foam ceramic materials, the conductive electrode is made of metal silver, and PN pairs in the high-temperature layer 1, the medium-temperature layer 3 and the low-temperature layer 5 are respectively made of metal silicide thermoelectric materials, IV-VI semiconductor compound thermoelectric materials and rare earth metal compound thermoelectric materials.
Fig. 3 is a structural diagram of a temperature control layer, and referring to fig. 3, the temperature control layer mainly functions to adjust the temperatures of the temperature sections so that the temperatures of the temperature sections are within a temperature range in which the thermoelectric material per stage has the best performance. The temperature adjusting layer adopts a pyramid lattice structure, so that the bearing capacity of the structure is improved, and the structure is light. However, the structure of the temperature adjusting layer is not limited to the pyramid lattice structure, and can also be a three-dimensional Kagome structure. In the embodiment, the high and medium temperature adjusting layers and the medium and low temperature adjusting layers are made of metal materials. The material and structure of the temperature adjusting layer need to be changed correspondingly for different working environments.
Claims (8)
1. A high-efficiency thermoelectric module with a plurality of temperature-regulating layers is characterized by comprising a plurality of temperature-regulating layers and temperature-regulating layers among the temperature-regulating layers, wherein the plurality of temperature-regulating layers are sequentially arranged according to a temperature gradient; the temperature adjusting layer comprises two temperature adjusting layer substrates, and a lattice structure composed of metal materials is arranged between the two temperature adjusting layer substrates; the temperature layer comprises an upper substrate layer (6), a lower substrate layer (8) and a functional layer (7) arranged between the two layers; the functional layer (7) comprises two layers of conductive electrodes (9), a PN pair (10) and a heat insulation support plate (11); the two layers of conductive electrodes (9) are positioned above and below the PN pairs (10) and are connected with the PN pairs (10) in a series connection mode, and the two layers of conductive electrodes (9) and the PN pairs (10) are embedded in the heat insulation support plate (11); the temperature of the temperature layer is determined by the temperature material adopted by the PN pair (10);
the lattice structure in the middle of the two temperature adjusting layer substrates comprises a pyramid lattice structure or a three-dimensional Kagome lattice structure.
2. A high efficiency thermoelectric module having multiple temperature regulated layers as claimed in claim 1 wherein: the multilayer temperature layer is a high temperature layer (1), a medium temperature layer (3) or a low temperature layer (5); the PN pairs (10) in the high-temperature layer (1) adopt high-temperature thermoelectric materials; the PN pairs (10) in the middle temperature layer (3) adopt middle temperature thermoelectric materials; and the PN pairs (10) in the low-temperature layer (5) adopt low-temperature thermoelectric materials.
3. A high efficiency thermoelectric module having multiple temperature regulated layers as claimed in claim 2 wherein: the high-temperature layer (1) is divided into a plurality of high-temperature layers, and the temperature of the high-temperature thermoelectric materials of the PN pairs (10) in each high-temperature layer is different.
4. A high efficiency thermoelectric module having multiple temperature regulated layers as claimed in claim 2 wherein: the medium temperature layer (3) is divided into a plurality of medium temperature layers, and the temperature of the medium temperature thermoelectric materials of the PN pairs (10) in each medium temperature layer is different.
5. A high efficiency thermoelectric module having multiple temperature regulated layers as claimed in claim 2 wherein: the low-temperature layer (5) is divided into a plurality of low-temperature layers, and the temperature of the low-temperature thermoelectric materials of the PN pairs (10) in each low-temperature layer is different.
6. A high efficiency thermoelectric module having multiple temperature regulated layers as claimed in claim 2 or 3, wherein: the working temperature of the high-temperature thermoelectric material is higher than 1000K.
7. The high efficiency thermoelectric module with multi-stage temperature regulation layer as claimed in claim 2 or 4, wherein: the working temperature range of the medium-temperature thermoelectric material is 373K-1000K.
8. The high efficiency thermoelectric module with multi-stage temperature regulation layer as claimed in claim 2 or 5, wherein: the working temperature range of the temperature of the low-temperature thermoelectric material is 373K or less.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101246947A (en) * | 2008-02-29 | 2008-08-20 | 西安交通大学 | Multilevel semiconductor cascade refrigeration element and refrigeration thermopile |
| WO2018008507A1 (en) * | 2016-07-04 | 2018-01-11 | 株式会社デンソー | Thermoelectric power generation device |
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| JP5437910B2 (en) * | 2010-05-18 | 2014-03-12 | 株式会社Ｋｅｌｋ | Temperature control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101246947A (en) * | 2008-02-29 | 2008-08-20 | 西安交通大学 | Multilevel semiconductor cascade refrigeration element and refrigeration thermopile |
| WO2018008507A1 (en) * | 2016-07-04 | 2018-01-11 | 株式会社デンソー | Thermoelectric power generation device |
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