WO2015045500A1 - 熱電変換モジュール - Google Patents
熱電変換モジュール Download PDFInfo
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- WO2015045500A1 WO2015045500A1 PCT/JP2014/065653 JP2014065653W WO2015045500A1 WO 2015045500 A1 WO2015045500 A1 WO 2015045500A1 JP 2014065653 W JP2014065653 W JP 2014065653W WO 2015045500 A1 WO2015045500 A1 WO 2015045500A1
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- conversion element
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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
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/80—Constructional details
- H10N10/82—Connection of interconnections
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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
- 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
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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
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/80—Constructional details
- H10N10/81—Structural details of the junction
Definitions
- the present invention relates to a thermoelectric conversion module that performs power generation using the Seebeck effect or performs cooling and heating using the Peltier effect.
- thermoelectric conversion module in which a plurality of thermoelectric conversion elements each having electrodes at both ends are arranged on a base (see, for example, Patent Document 1).
- thermoelectric conversion module of Patent Document 1 is a so-called ⁇ -type thermoelectric conversion module in which two types of thermoelectric conversion elements, n-type thermoelectric conversion elements and p-type thermoelectric conversion elements, are alternately arranged and electrically connected in series. Consists of.
- thermoelectric conversion module of Patent Document 1 the high temperature side of the thermoelectric conversion module is not in contact with the heating chamber in the resistance heating furnace covered with the heat insulating material, and on the high temperature side of the thermoelectric conversion module, It is structured to receive radiant heat transfer. Therefore, in the thermoelectric conversion module of Patent Document 1, the base as an insulator on the high temperature side is omitted. In addition, when making the high temperature side of a thermoelectric conversion module contact the heating chamber in a resistance heating furnace, the base part comprised with an insulator will be provided.
- thermoelectric conversion module constituted by only one type of either n-type or p-type thermoelectric conversion elements is also known (see, for example, Patent Document 2).
- thermoelectric conversion module of Patent Document 2 has a connection portion that integrally and electrically connects one electrode of a thermoelectric conversion element and the other electrode of an adjacent thermoelectric conversion element, A U-shaped connector is constituted by the electrode and the connecting portion. This U-shaped connector is formed by bending a metal plate.
- a plurality of U-shaped connectors are fixed to the base in advance. The thermoelectric conversion element is inserted between the two electrodes so as to be pushed into the U-shaped connector from the side, and is connected to the connector.
- thermoelectric conversion element When using the Seebeck effect to generate power with a thermoelectric conversion element, the electromotive voltage of the thermoelectric conversion element is extremely low. For this reason, in practical use, it is necessary to configure so that a sufficient electromotive force can be obtained by connecting thermoelectric conversion elements in series. However, when the thermoelectric conversion elements are connected in series, there is a problem that if any of the thermoelectric conversion elements is damaged and no electricity can flow, the module as a whole cannot be used and the reliability is poor.
- the present invention has been made in view of the above points, and an object thereof is to provide a thermoelectric conversion module capable of improving reliability while ensuring a sufficient electromotive voltage.
- the present invention provides a plurality of first electrodes and one end portion of the first electrode.
- a thermoelectric conversion module comprising a plurality of thermoelectric conversion elements that are electrically connected to electrodes, and a plurality of second electrodes that are respectively electrically connected to the other ends of the thermoelectric conversion elements.
- a plurality of series groups in which conversion elements are connected in series are provided, and the series groups are connected in parallel.
- thermoelectric conversion elements since a plurality of series groups in which thermoelectric conversion elements are connected in series are connected in parallel, even if one thermoelectric conversion element in the series group is damaged, the other series group thermoelectric conversion elements The reliability can be improved. Moreover, since the thermoelectric conversion elements are connected in series in each series group, the electromotive voltage of the thermoelectric conversion module can be increased.
- the present invention provides a plurality of first electrodes, a plurality of thermoelectric conversion elements whose one end is electrically connected to the first electrode, and the other end of the thermoelectric conversion element.
- a thermoelectric conversion module comprising a plurality of second electrodes that are electrically connected to each other, comprising a plurality of parallel groups in which the thermoelectric conversion elements are connected in parallel, wherein the parallel groups are connected in series.
- thermoelectric conversion elements since a plurality of parallel groups in which thermoelectric conversion elements are connected in parallel are connected in series, even if one thermoelectric conversion element of the parallel group is damaged, electricity is allowed to flow through other thermoelectric conversion elements. And reliability can be improved.
- the parallel groups are connected in series. For this reason, the electromotive voltage of a thermoelectric conversion module can be raised.
- a pair of terminal portions for inputting and outputting electricity is provided, and one of the terminal portions is the other terminal of the adjacent thermoelectric conversion module when the plurality of thermoelectric conversion modules are arranged.
- One terminal part and the other terminal part of the adjacent thermoelectric conversion module that are located adjacent to each other can be connected by a binding member.
- thermoelectric conversion modules can be connected and used as one thermoelectric conversion module, and the installation area of the thermoelectric conversion module can be easily changed while maintaining the element density high. it can.
- thermoelectric conversion element In the present invention, a guide portion for positioning the thermoelectric conversion element can be provided on the first electrode or the second electrode. According to the present invention, when the thermoelectric conversion element is connected to the first electrode or the second electrode, the thermoelectric conversion element is mistakenly shifted to the first electrode or the second electrode (the position is shifted). ) It is possible to prevent the connection and assemble the thermoelectric conversion module quickly.
- the first electrode or the second electrode is preferably formed of a member having a brazing filler metal layer on the surface.
- the step of providing the brazing material can be omitted in correspondence with the portion where the first electrode or the second electrode and the thermoelectric conversion element are joined, and the manufacture of the thermoelectric conversion module can be facilitated.
- the thermoelectric conversion module preferably includes a base portion on which the first electrode or the second electrode is disposed, and the base portion is preferably divided into a plurality of portions. According to the present invention, since the base is divided, the size of the base can be easily changed, and it is not necessary to recreate the base every time the size of the thermoelectric conversion module is changed, which is convenient. It is.
- the base is preferably divided into parallel groups or series groups. According to the present invention, since the number of parallel groups or series groups can be increased and the number of base portions can be increased, the change of the size of the thermoelectric conversion module is further facilitated.
- the plurality of thermoelectric conversion elements are either n-type or p-type, and are electrically connected to the first electrode and the adjacent thermoelectric conversion elements. It is preferable that a connecting portion for electrically connecting the electrode is provided, and the connecting portion is provided with a follower configured to improve followability to deformation due to thermal expansion and contraction of the thermoelectric conversion element. According to the present invention, even if the thermoelectric conversion element is deformed due to thermal expansion or contraction, the follower can cope with the deformation.
- the n-type thermoelectric conversion element and the p-type thermoelectric conversion element adjacent to each other are the first electrode.
- the first electrodes or the second electrodes connected to each other or the second electrodes are bent from the side edge of the first electrode or the second electrode toward the other electrode side, and then folded. It is preferable to connect to a side edge of the adjacent first electrode or the second electrode, and to be connected via an absorption portion that absorbs deformation due to thermal expansion of the thermoelectric conversion element.
- the difference of the thermal expansion coefficient of an n-type thermoelectric conversion element and a p-type thermoelectric conversion element can be absorbed in an absorption part.
- a pair of terminal portions for inputting and outputting electricity are provided, and at least one of the terminal portions is connected to the first electrode or the second electrode electrically connected to the parallel group or the series group. It is preferable to be provided through a bent piece that bends along one side edge of the parallel group or series group and suppresses the temperature rise of the at least one terminal portion.
- the bent piece can suppress a state in which the temperature difference between the both ends of the thermoelectric conversion element cannot be properly maintained due to the radiant heat of the terminal portion.
- thermoelectric conversion element a plurality of first electrodes are provided corresponding to each thermoelectric conversion element, and the second electrode can be fixed to the base.
- the first electrode is provided corresponding to each thermoelectric conversion element, the interval between the adjacent first electrodes can be expanded and contracted, and deformation due to thermal expansion and contraction of the thermoelectric conversion element is reduced. It can be absorbed on one electrode side.
- the second electrode when the second electrode is fixed to the base, the second electrode is integrally formed corresponding to the parallel group.
- the second electrodes connected to the plurality of thermoelectric conversion elements can be arranged at one time, and the assembly of the thermoelectric conversion module is performed. It can be simplified.
- the perspective view which shows the thermoelectric conversion module of 1st Embodiment of this invention The perspective view which changes the direction and shows the thermoelectric conversion module of FIG.
- the perspective view which changes the direction and shows the thermoelectric conversion module of FIG. The exploded view of the thermoelectric conversion module of 3rd Embodiment.
- the perspective view which changes the direction and shows the thermoelectric conversion module of FIG. The exploded view of the thermoelectric conversion module of 4th Embodiment.
- thermoelectric conversion module 1 A first embodiment of a thermoelectric conversion module of the present invention will be described with reference to FIGS.
- the thermoelectric conversion module 1 according to the first embodiment shown in FIGS. 1 to 3 is a so-called unileg type in which a plurality of n-type thermoelectric conversion elements 2 are electrically connected.
- the thermoelectric conversion element 2 is made of Mg 2 Si and is formed in a quadrangular prism shape.
- materials for thermoelectric conversion elements there are many materials that are harmful to human bodies (including those that are feared to be harmful), and are expensive.
- Mg 2 Si is harmless to the human body, has a small environmental load, is rich in resources, and is inexpensive.
- Mg 2 Si has a low specific gravity, a very light thermoelectric conversion element 2 can be produced. For this reason, in recent years, Mg 2 Si has attracted attention as a material for thermoelectric conversion elements.
- the first electrode 3 is joined to the upper end of the thermoelectric conversion element 2. Thereby, the thermoelectric conversion element 2 and the 1st electrode 3 are electrically connected.
- the second electrode 4 is joined to the lower end of the thermoelectric conversion element 2. Thereby, the thermoelectric conversion element 2 and the 2nd electrode 4 are electrically connected.
- the first electrode 3 and the second electrode 4 are formed of a nickel plate (Ni plate) having a brazing material layer on the surface to which the thermoelectric conversion element 2 is connected.
- the first electrode 3 and the second electrode 4 may be formed by integrally forming a brazing material layer, or after the brazing material is screen-printed on the surface of the nickel plate, the first electrode 3 and the second electrode 4. It may be formed by punching into a shape.
- first electrode 3 and the second electrode 4 configured as described above, it is not necessary to print the brazing material for each of the first electrode 3 or the second electrode 4, and the number of times of the brazing material printing is reduced. Thus, the manufacturing process can be simplified.
- the electrodes 3 and 4 are not limited to nickel (Ni) but may be made of other materials, for example, copper (Cu) plated with nickel (Ni).
- a joining method soldering, brazing or the like, or adhesion using a conductive adhesive such as silver paste, diffusion bonding can be used, and it is appropriately selected according to the use of the thermoelectric conversion module. Join.
- brazing solder
- Shaped members are used as the electrodes 3 and 4.
- the surface of the thermoelectric conversion element 2 is a surface having fine irregularities, it can be made a smooth surface by covering the irregularities on the surface with solder (solder), silver paste, or the like, whereby the thermoelectric conversion element 2 As a result, the bonding state between the electrode 3 and the electrode 4 is improved, and excellent conductivity can be secured.
- a bonding layer such as nickel may be formed on both ends (upper and lower ends) of the thermoelectric conversion element 2 to facilitate the bonding between the thermoelectric conversion element 2 and the electrodes 3 and 4. .
- the second electrode 4 is fixed on the plate-like base 5.
- the base part 5 is comprised with the plate-shaped body which has the insulation shape shape
- the base located above is omitted in order to make the inside of the thermoelectric conversion module 1 easy to see.
- the base located above is necessary for reasons such as prevention of short circuit when the thermoelectric conversion module 1 is used in contact with a metal-like one having a conductive exterior, but the thermoelectric conversion module 1 is In the case where an object to be contacted is insulated or configured so that heat can be radiated (cooled) without being brought into contact, the base portion located above may not be provided.
- the material of the base may be appropriately changed according to what is to be contacted. For example, you may comprise an upper base part with the insulating heat conductive sheet provided with flexibility.
- the thermoelectric conversion module 1 can be configured by leaving only the upper base portion and eliminating the lower base portion 5. Moreover, there may be no both upper and lower bases.
- thermoelectric conversion module 1 Defined X direction and Y direction as shown in FIG.
- thermoelectric conversion module 1 of the present embodiment four thermoelectric conversion elements 2 are arranged in the X direction and four thermoelectric conversion elements 2 are arranged in the Y direction, and one thermoelectric conversion module 1 is composed of a total of 16 thermoelectric conversion elements 2. Composed.
- thermoelectric conversion module 1 As shown in an exploded view in FIG. 3, the four electrically connected to the four thermoelectric conversion elements 2 arranged in the X direction located in the forefront (the backmost in FIG. 2) of the thermoelectric conversion module 1 of the present embodiment.
- the second electrode 4 is configured as an integrated second electrode 6 formed integrally.
- a bent piece 7 that is bent upward is formed on the side edge of the integrated second electrode 6 in the Y direction.
- An L-shaped first terminal portion 8 is provided from the front end edge of the bent piece 7 on the most front side.
- the 1st terminal part 8 is formed so that the L-shaped front-end
- the cross-sectional area required for the current flowing through the first terminal portion 8 can be reduced. Therefore, by providing the bent piece 7, the area of the first terminal portion 8 can be reduced, heat is conducted from the high temperature side, and the influence of the radiant heat of the first terminal portion 8 that generates heat due to the current flow. And it can suppress that the temperature difference of the both ends of the thermoelectric conversion element 2 becomes small.
- thermoelectric conversion module 1 In the part of the integrated second electrode 6 that is electrically connected to the thermoelectric conversion element 2, a recess 6a that is recessed corresponding to the thermoelectric conversion element 2 is provided.
- the recess 6 a positions the thermoelectric conversion element 2 when it is fixed to the integrated second electrode 6. Thereby, it is possible to prevent the thermoelectric conversion element 2 from being erroneously (displaced) and joined to the integrated second electrode 6, and to quickly assemble the thermoelectric conversion module 1.
- thermoelectric conversion element 2 since it is not necessary to prepare a jig for positioning the thermoelectric conversion element 2 and a space for installing the jig is not required, the density of the thermoelectric conversion element 2 per unit area of the base 5 is improved. it can.
- the concave portion 6a functions as a guide portion of the present invention in the integrated second electrode 6 of the present embodiment.
- thermoelectric conversion modules 1 of the present embodiment are electrically connected to four thermoelectric conversion elements 2 arranged in the X direction located at the innermost position (frontmost in FIG. 2).
- the four first electrodes 3 are configured as an integrated first electrode 9 formed integrally.
- the integrated first electrode 9 has a bent piece 10 that is bent downward on the side edge in the Y direction.
- Each first electrode 3 of the integrated first electrode 9 is integrally connected via a bent piece 10.
- the bent piece 10 is provided with a slit 11 which is located between the first electrodes 3 and is notched downward from the upper edge.
- a second terminal portion 12 is provided corresponding to the first terminal portion 8 on the side edge of the bent piece 10 on the front side in the X direction (the back side in FIG. 2).
- the first electrodes 3 other than the integrated first electrode 9 are integrally formed in a substantially Z shape via the second electrode 4 and the connection portion 13 that are electrically connected to the thermoelectric conversion element 2 adjacent in the Y direction.
- the connection part 13 is provided with a notch part 14 having a center part notched.
- the cutout portion 14 minimizes the cross-sectional area of the connection portion 13 with respect to the current flowing through the connection portion 13, minimizes heat conduction from the high temperature side to the low temperature side in the connection portion 13, and provides a thermoelectric conversion element. It is possible to prevent the temperature difference between both ends of 2 from becoming small.
- the first electrode 3 and the second electrode 4 connected by the connecting portion 13 are provided with a folded portion 15 that is folded back from the X direction side edge toward the thermoelectric conversion element 2 side.
- the folded portion 15 is provided corresponding to the side surface in the X direction of the thermoelectric conversion element 2 and is used for positioning the thermoelectric conversion element 2 and the first electrode 3 or the second electrode 4.
- returning part 15 functions as a guide part of this invention.
- returning part 15 may be provided only in one of the 1st electrode 3 or the 2nd electrode 4, and does not need to be provided in the 1st electrode 3, for example.
- a substantially Z-shaped member composed of the first electrode 3, the second electrode 4, and the connection portion 13 is defined as a substantially Z-shaped member 16.
- thermoelectric conversion elements 2 electrically connected to the integrated second electrode 6 and four thermoelectric conversion elements 2 electrically connected to the integrated first electrode 9 are arranged in a parallel group. 17 is constituted.
- the two parallel groups 17 are connected in series at four locations via three substantially Z-shaped members 16 and two thermoelectric conversion elements 2 arranged in the Y direction.
- the base 5 of the present embodiment is configured by a divided substrate 18 that is divided into four in the Y direction so as to correspond to the parallel group 17.
- the thermoelectric conversion module 1 of this embodiment can be easily installed even if the installation location is a curved place such as a convex curved surface.
- the size of the base 5 can be easily changed by changing the number of the divided substrates 18. Thereby, it becomes easy to change the magnitude
- the base portion 5 with a plurality of divided substrates 18, it becomes easy to absorb deformation due to thermal expansion and contraction of the thermoelectric conversion element 2.
- the divided substrate 18 of this embodiment is provided corresponding to the parallel group 17, the number of the divided substrates 18 can be increased or decreased in correspondence with the increase or decrease of the number of the parallel groups 17, and the thermoelectric conversion module 1 Design flexibility is further increased.
- thermoelectric conversion modules 1 show three thermoelectric conversion modules 1 according to the first embodiment arranged in the Y direction, and the adjacent first terminal portion 8 and second terminal portion 12 have elastic force formed in a substantially cylindrical shape. It is bundled by the bundling member 19 provided.
- thermoelectric conversion module 1 of this embodiment can be configured as a single thermoelectric conversion module by bundling a plurality of first terminal portions 8 and second terminal portions 12 that are arranged side by side with the bundling member 19. This makes it possible to easily change the installation area while keeping the element density high according to the size of the installation location of the thermoelectric conversion module 1. In other words, according to the thermoelectric conversion module 1 of the present embodiment, the degree of freedom of installation is improved. Moreover, the useless space between the thermoelectric conversion modules 1 can be kept to a minimum, and the connection body of the thermoelectric conversion modules 1 can be downsized.
- thermoelectric conversion module 1 of the present embodiment When the lower base 5 of the thermoelectric conversion module 1 is attached to a heat source of, for example, 300 ° C. to 600 ° C. and the upper base (not shown) is cooled, a temperature difference occurs at both ends of the thermoelectric conversion element 2, and current is generated by the Seebeck effect. Flows and generates electricity. At this time, in order to continue power generation, it is necessary to maintain a predetermined temperature difference at both ends of the thermoelectric conversion element 2, but in the first embodiment, Mg 2 having a low thermal conductivity as the material of the thermoelectric conversion element 2 is used. Since Si is used, the temperature difference can be maintained satisfactorily.
- thermoelectric conversion module 1 of the present embodiment the two parallel groups 17 are connected in series at four locations via the three substantially Z-shaped members 16 and the two thermoelectric conversion elements 2 arranged in the Y direction. Thereby, even if any one of the thermoelectric conversion elements 2 in the parallel group 17 is damaged, the other thermoelectric conversion elements 2 can convert heat into electricity or electricity into heat, thereby improving reliability. Can do.
- thermoelectric conversion module 1 of this embodiment is provided with the part to which the thermoelectric conversion element 2 is connected in series, it can raise an electromotive voltage. Further, in the present embodiment, the thermoelectric conversion module 1 is changed to an arbitrary size in the Y direction by adding or deleting the substantially Z-shaped member 16, the thermoelectric conversion element 2, and the divided substrate 18. Can do. Therefore, the thermoelectric conversion module 1 of the present embodiment can easily change the size while improving the reliability.
- the 2nd electrode 4 is fixed to the base 5
- the slit 11 is provided in the integrated 1st electrode 9, and the other 1st electrode 3 is connected to each thermoelectric conversion element 2 connected.
- the interval is kept corresponding to each other. Therefore, deformation due to thermal expansion and contraction of the thermoelectric conversion element 2 and the base 5 can be absorbed on the first electrode 3 side.
- the 2nd electrode 4 of the substantially Z-shaped member 16 demonstrated what separated for every thermoelectric conversion element 2 in a X direction.
- the second electrodes 4 of the substantially Z-shaped member 16 are integrally formed like the integrated second electrode 6 in the X direction. May be.
- four thermoelectric conversion elements positioned between the two parallel groups 17 of the first embodiment also form a parallel group arranged in the X direction.
- the second electrode 4 is provided with a recess 4 a that is the same as the recess 4 a for positioning the thermoelectric conversion element 2 described in detail in the second embodiment to be described later. (See FIGS. 10 and 11).
- thermoelectric conversion elements 2 electrically connected to the integrated second electrode 6 and the four thermoelectric conversion elements 2 electrically connected to the integrated first electrode 9 are arranged in parallel. It was described as group 17. However, if the thermoelectric conversion module of 1st Embodiment changes a view, the three substantially Z-shaped members 16 and two thermoelectric conversion elements 2 which are located in a line in the Y direction which connects two parallel groups 17 in series at four places. Can be defined as constituting a series group.
- the four series groups are connected in parallel by the integrated second electrode 6 and the integrated first electrode 9.
- the base 5 may be divided into four in the X direction so as to correspond to the series group, and may be configured by four divided substrates.
- the thermoelectric conversion module in order to change the size of the thermoelectric conversion module, it is necessary to change the size of the integrated second electrode and the integrated first electrode, but only by increasing or decreasing the number of series groups in the X direction. Since the size of the module can be changed, it is relatively easy to change the design while improving the reliability.
- connection part 13 may provide the notch groove 213a of 2nd Embodiment mentioned later in the connection part 13 of 1st Embodiment. If the connection part 13 is provided with a notch groove, the connection part 13 can easily expand and contract in the vertical direction, and the followability to deformation due to thermal expansion and contraction of the thermoelectric conversion element 2 can be improved. Moreover, even if the height of each thermoelectric conversion element 2 varies, the first electrode 3 is pressed against the thermoelectric conversion element 2 by deforming the notch groove, and the thermoelectric conversion element 2, the first electrode 3, and the second electrode 4 are deformed. Can be reliably joined. Thus, the said notch groove corresponds to the following part of this invention.
- the follower of the present invention is not limited to the cutout groove, and may have other configurations as long as it can be expanded and contracted in the vertical direction so as to follow the thermal expansion and contraction of the thermoelectric conversion element.
- the follower may have a wave shape (a bellows shape), a dogleg shape, or a curved shape.
- thermoelectric conversion element 2 of this embodiment showed the thing of square pillar shape in FIG. 2, it is not restricted to this, For example, it is good also as a column shape.
- thermoelectric conversion element 2 is produced by Mg 2 Si, not limited to this.
- Bi-Te system including Sb-Te system and Bi-Se system
- Pb-Te system including Sn-Te system and Ge-Te system
- Ag-Sb-Te system Ag-Sb-Ge-Te system
- Si-Ge Fe-Si
- Mn-Si Zn-Sb
- chalcogenite skutterudite
- skutterudite filled skutterudite
- clathrate half-Heusler, Heusler, boron carbide, layered cobalt oxide, etc.
- Any thermoelectric conversion material can be used.
- thermoelectric conversion element 2 the thing using only the n-type thing was demonstrated as the thermoelectric conversion element 2, it is not restricted to this, You may use only a p-type thermoelectric conversion element.
- Mg 2 Si does not have to be highly pure, and may be obtained by using, for example, waste silicone sludge discharged during grinding / polishing.
- a bonding layer may be provided at both ends of the thermoelectric conversion element 2 in order to reduce the contact resistance with the electrode.
- the bonding layer can also be formed integrally with the thermoelectric conversion element.
- the bonding layer and the electrode can be made of any material such as Ni, Al, Cu, W, Au, Ag, Co, Mo, Cr, Ti, Pd, and an alloy made of these.
- thermoelectric conversion module 1 for power generation using the Seebeck effect has been described.
- thermoelectric conversion module of the present invention can be similarly used for those that are cooled or heated using the Peltier effect. it can.
- thermoelectric conversion module 1 shown in FIG. 1 is in contact with the heat source
- the lower side where the upper side is radiated (cooled).
- the method of using the thermoelectric conversion module of the present invention is not limited to this.
- the upper side may be set as the high temperature side and the lower side may be set as the low temperature side.
- first terminal portion 8 and the second terminal portion 12 can be appropriately changed in consideration of whether or not the thermoelectric conversion modules 1 are connected to each other by the binding member 19.
- thermoelectric conversion module of the present invention Next, a second embodiment of the thermoelectric conversion module of the present invention will be described with reference to FIGS.
- symbol 217 of FIG.7 and FIG.8 shows the parallel group of 2nd Embodiment.
- thermoelectric conversion module 201 according to the second embodiment is substantially Z-shaped as the thermoelectric conversion module 1 according to the first embodiment as described above as a modification of the first embodiment.
- the second electrode 4 of the member 16 is integrally formed in the X direction (see FIGS. 9 to 11), and two thermoelectric conversion modules 1 of the first embodiment are connected side by side to form one thermoelectric conversion module. .
- the four first electrodes 3 that are integrally connected in the X direction have four first electrodes that are integrally connected in the X direction.
- the two electrodes 4 are integrally connected.
- This connecting portion includes a crank portion 203a bent in a crank shape.
- the crank portion 203a By the crank portion 203a, the four first electrodes 3 integrally connected in the X direction hang downward from the side edge on the front side in the Y direction in FIG. 8 (the side edge on the back in the Y direction in FIGS. 7 and 9).
- the drooping portion 203b is configured to be slightly separated from the thermoelectric conversion element 2. This makes it difficult for the thermoelectric conversion element 2 to be affected by the radiant heat of the hanging portion 203b.
- crank portion 203a can follow the thermal expansion or contraction of the thermoelectric conversion element 2 with the vertical distance between the four first electrodes 3 and the four second electrodes 4 connected to each other. Yes. That is, in the present embodiment, the crank portion 203a also corresponds to the following portion of the present invention.
- thermoelectric conversion module 201 of the second embodiment the shape of the connecting portion 213 is different from that of the first embodiment.
- the connection part 13 of the first embodiment is provided with a notch part 14 in which a central part is notched.
- connection part 213 of the second embodiment is provided with a notch part 214 in which only the center part is left and the side edge part is notched.
- the cutout 214 also minimizes the cross-sectional area of the connection portion 213 with respect to the current flowing through the connection portion 213, minimizes heat conduction from the high temperature side to the low temperature side in the connection portion 213, and performs thermoelectric conversion. It is possible to prevent the temperature difference between both ends of the element 2 from becoming small.
- the connecting portion 213 is provided with two notches 213a on the surface thereof, which are notched in a horizontal groove shape in the X direction at intervals in the vertical direction. Due to the notch groove 213a, the connecting portion 213 can easily expand and contract in the vertical direction, and the followability to deformation due to thermal expansion and contraction of the thermoelectric conversion element 2 can be enhanced. Moreover, even if the height of each thermoelectric conversion element 2 varies, the first electrode 3 is pressed against the thermoelectric conversion element 2 by deforming the notch groove 213a, and the thermoelectric conversion element 2, the first electrode 3, and the second electrode 4 can be reliably joined.
- this notch groove 213a corresponds to the follower of the present invention.
- the follower of the present invention is not limited to the cutout groove, and may have other configurations as long as it can be expanded and contracted in the vertical direction so as to follow the thermal expansion and contraction of the thermoelectric conversion element.
- the follower may have a wave shape (a bellows shape), a dogleg shape, or a curved shape.
- thermoelectric conversion module 201 of the second embodiment also has the same operational effects as the thermoelectric conversion module 1 of the first embodiment, such as improved reliability, high electromotive voltage, and ease of change in size, and similar modifications Can be applied.
- the first electrode 3 connected to the connection portion 213 is provided with a recess 3 a (guide portion) for positioning the thermoelectric conversion element 2, and connected to the connection portion 213.
- the second electrode 4 is provided with a recess 4a (guide portion) for positioning the thermoelectric conversion element 2.
- the concave portions 3a and 4a as the guide portions may be provided only on one of the electrodes.
- thermoelectric conversion element 2 side may be provided on the X-direction side edge of the first electrode 3 in the same manner as the folded portion 15 of the first embodiment.
- direction of the 1st terminal part 8 and the 2nd terminal part 12 can be suitably changed after considering whether the thermoelectric conversion modules are connected by the binding member 19 like 1st Embodiment.
- thermoelectric conversion module of the present invention a third embodiment of the thermoelectric conversion module of the present invention will be described with reference to FIGS.
- the thermoelectric conversion module 301 of the third embodiment is a so-called ⁇ -type that electrically connects the n-type thermoelectric conversion element 2 and the p-type thermoelectric conversion element 2 ′. As shown in FIG. 12, they are arranged in the order of p-type, n-type, p-type, and n-type from the front in the Y direction. Four thermoelectric conversion elements of the same type are arranged in the X direction.
- thermoelectric conversion module In the so-called ⁇ -type thermoelectric conversion module, the p-type thermoelectric conversion element 2 ′ functions as a connection portion that connects the first electrode and the second electrode that is electrically connected to the adjacent thermoelectric conversion element. For this reason, in the so-called ⁇ -type thermoelectric conversion module, there is no connection portion.
- the first electrode 3 positioned between the Y-directions of the two integrated first electrodes 9 of the third embodiment is electrically connected between the first electrodes 3 adjacent in the Y-direction.
- the first electrodes 3 adjacent in the Y direction are electrically connected to each other via the W-shaped bent piece 20 bent downward from the side edge of the first electrode 3 in front of the X direction.
- the W-shaped bent piece 20 includes a bent portion that hangs down from the side edge of the first electrode 3 and a bent portion that connects the two bent portions in the Y direction. Since the thermal expansion coefficient differs between the n-type thermoelectric conversion element 2 and the p-type thermoelectric conversion element 2 ′, the W-shaped bent piece 20 is easily deformed so as to cope with this expansion difference (contraction difference). It is formed in a shape. Further, the W-shaped bent piece 20 can also absorb the change in the distance between the thermoelectric conversion elements 2 in the Y direction (horizontal direction) due to the thermal expansion of the base 5.
- the W-shaped bending piece 20 of this embodiment corresponds to the absorption part of the present invention.
- the second electrode 304 of the third embodiment electrically connects the n-type thermoelectric conversion element 2 and the p-type thermoelectric conversion element 2 ′ that are adjacent in the Y direction. As described above, the second electrode of the n-type thermoelectric conversion element 2 and the second electrode of the p-type thermoelectric conversion element 2 ′ are connected and integrated in the Y direction.
- thermoelectric conversion module 301 In the thermoelectric conversion module 301 according to the third embodiment, four series of thermoelectric conversion elements 2 and 2 ′ in which p-type and n-type are alternately arranged in the Y direction constitute one series group 17 ′. Four are arranged in the direction. Each series group 17 ′ is connected in parallel by integral first electrodes 9 provided at both ends in the Y direction.
- the first integrated electrode 9 on the front side is provided with a first terminal portion 8, and the integrated first electrode 9 on the back side is provided with a second terminal portion 12 as in the first embodiment. .
- the integrated first electrode 9 of the third embodiment is symmetrical.
- the base portion 5 of the third embodiment includes a divided substrate 318 divided into four in the X direction so as to correspond to the series group 17 ′.
- thermoelectric conversion module 301 of the third embodiment According to the thermoelectric conversion module 301 of the third embodiment, the same effects as those of the first and second embodiments can be obtained, the reliability can be improved, the electromotive voltage can be increased, and the size can be easily changed. it can.
- the second electrodes 304 of the third embodiment may be integrated with each other arranged in the X direction as in the second electrode of the fourth embodiment described later.
- the four p-type thermoelectric conversion elements 2 ′ on the near side and the four n-type thermoelectric conversion elements 2 form one parallel group.
- the base 5 can also be constituted by a divided substrate divided into two in the Y direction as in the base of the fourth embodiment described later.
- the same modification as in the first embodiment and the second embodiment can be applied.
- the positions of the n-type thermoelectric conversion element 2 and the p-type thermoelectric conversion element 2 ′ may be interchanged.
- the direction of the 1st terminal part 8 and the 2nd terminal part 12 can be suitably changed after considering whether the thermoelectric conversion modules are connected by the binding member 19 like 1st Embodiment.
- thermoelectric conversion module of the present invention will be described with reference to FIGS. 15 to 17.
- symbol 417 of FIG.15 and FIG.16 has shown the parallel group in 4th Embodiment.
- thermoelectric conversion module 401 of the fourth embodiment is a so-called ⁇ -type that electrically connects the n-type thermoelectric conversion element 2 and the p-type thermoelectric conversion element 2 ′, as in the third embodiment.
- the thermoelectric conversion module 401 of the fourth embodiment includes the first electrode 3 positioned between the second electrode, the divided substrate, and the two integrated first electrodes in the Y direction. The connection structure between them is different.
- a total of eight first electrodes 3 including two in the Y direction and two in the Y direction, which are located between the Y directions of the two integrated first electrodes 9, are a single metal plate. And is formed by bending the connecting portion as will be described later.
- the two first electrodes 3 that are located on the front side in the X direction (the back side in FIG. 16) and are aligned in the Y direction are W-shaped bent pieces 420 that bend downward from the side edge on the front side in the X direction.
- the two first electrodes 3 that are located on the back side in the X direction (front side in FIG. 16) and are aligned in the Y direction are bent in a W shape that bends downward from the side edge in the back direction in the X direction. They are connected via a piece 420.
- each of the four first electrodes 3 positioned on the front side in the Y direction (the back side in FIG. 16) and arranged in the X direction includes bent pieces 421 that are bent downward from the side edge on the front side in the Y direction.
- the lower ends of the bent pieces 421 are connected by a connecting portion 422.
- the four first electrodes 3 are connected in the X direction by the bent piece 421 and the connecting portion 422. Since the same thermoelectric conversion elements 2 and 2 ′ are arranged in the X direction, the connecting portion 422 does not need to be easily deformed like the W-shaped bent piece 420 in the Y direction.
- each of the four first electrodes 3 positioned on the back side in the Y direction (the labor side in FIG. 16) and arranged in the X direction includes bending pieces 421 that are bent downward from the side edge at the back in the Y direction.
- the lower ends of the bent pieces 421 are connected by a connecting portion 422.
- the four first electrodes 3 are connected in the X direction by the bent piece 421 and the connecting portion 422.
- the second electrode 404 of the fourth embodiment is configured by integrating the second electrodes 304 of the third embodiment that are arranged in the X direction.
- the base portion 5 of the fourth embodiment includes a divided substrate 418 that is divided into two in the Y direction so as to correspond to the parallel group 417.
- thermoelectric conversion module 401 of the fourth embodiment it is possible to achieve the effects of improving reliability, high electromotive voltage, and ease of changing the size, as in the first to third embodiments.
- the second electrode 404 and the divided substrate 418 of the fourth embodiment can be replaced with the second electrode 304 and the divided substrate 318 of the third embodiment.
- thermoelectric conversion module 401 of the fourth embodiment a modification similar to the thermoelectric conversion modules of the first to third embodiments can be applied. Further, the orientations of the first terminal portion 8 and the second terminal portion 12 are changed by appropriately bending the thermoelectric conversion modules in consideration of whether or not the thermoelectric conversion modules are connected by the binding member 19 as in the first embodiment. Is possible.
- Thermoelectric conversion module 2 Thermoelectric conversion element 3 1st electrode 4 2nd electrode 5 Base 6 Integrated 2nd electrode 6a Recessed part (guide part) 7 Bending piece 8 First terminal portion 9 Integrated first electrode 10 Bending piece 11 Slit 12 Second terminal portion 13 Connection portion 14 Notch portion 15 Folding portion (guide portion) 16 Substantially Z-shaped member 17 Parallel group 18 Divided substrate 19 Bundling member 20 W-shaped bent piece (absorption part of 3rd Embodiment) 213 Connection part (2nd Embodiment) 213a Notch groove (following part)
Abstract
Description
電極と夫々電気的に接続される複数の熱電変換素子と、該熱電変換素子の他方の端部に夫々電気的に接続される複数の第2電極とを備える熱電変換モジュールであって、前記熱電変換素子を直列に接続した複数の直列群を備え、該直列群を並列に接続することを特徴とする。
構成され、第1電極と、隣接する熱電変換素子に電気的に接続される第2電極とを電気的に接続する接続部が設けられ、接続部には、熱電変換素子の熱膨張や熱収縮による変形への追従性を高めるように構成された追従部が設けられることが好ましい。本発明によれば、熱電変換素子が熱膨張又は熱収縮して変形しても、追従部でその変形に対応させることができる。
図1から図5を参照して、本発明の熱電変換モジュールの第1実施形態を説明する。図1から図3に示す第1実施形態の熱電変換モジュール1は、複数のn形の熱電変換素子2が電気的に接続された所謂ユニレグ型のものである。
。また、屈曲片10には、各第1電極3の間に位置させて上縁から下方に向かって切り欠かれたスリット11が設けられている。
体の小型化を図ることもできる。
換素子2の熱膨張や熱収縮による変形への追従性を高めることができる。また、各熱電変換素子2の高さにバラツキが生じたとしても切欠溝を変形させることで第1電極3を熱電変換素子2に押し付けて熱電変換素子2と第1電極3及び第2電極4とを確実に接合させることができる。このように、当該切欠溝は本発明の追従部に該当する。なお、本発明の追従部は、切欠溝に限らず、熱電変換素子の熱膨張や熱収縮に追従するように上下方向に伸縮できるものであれば他の構成であってもよい。例えば、追従部は、波形状(蛇腹形状)、くの字形状、湾曲形状であってもよい。
次に、図7から図11を参照して、本発明の熱電変換モジュールの第2実施形態を説明する。なお、第1実施形態のものと同一のものは、同一の符号を付してその説明を省略する。また、図7及び図8の符号217は、第2実施形態の並列群を示す。
ものである。
を結束部材19で連結させるか否かを考慮した上で、適宜変更可能である。
次に、図12から図14を参照して、本発明の熱電変換モジュールの第3実施形態を説明する。なお、第1実施形態又は第2実施形態のものと同一のものは、同一の符号を付してその説明を省略する。また、図12及び図13における符号17’は第3実施形態の直列群を示す。
子2’と4つのn形の熱電変換素子2とで1つの並列群を構成する。この場合、基部5を後述する第4実施形態の基部の如く、Y方向で2つに分割した分割基板で構成することもできる。
次に、図15から図17を参照して、本発明の熱電変換モジュールの第4実施形態を説明する。なお、第1から第3実施形態のものと同一のものは、同一の符号を付してその説明を省略する。また、図15及び図16の符号417は、第4実施形態における並列群を示している。
2 熱電変換素子
3 第1電極
4 第2電極
5 基部
6 一体型第2電極
6a 凹部(案内部)
7 折曲片
8 第1端子部
9 一体型第1電極
10 屈曲片
11 スリット
12 第2端子部
13 接続部
14 切欠部
15 折返部(案内部)
16 略Z字状部材
17 並列群
18 分割基板
19 結束部材
20 W字状屈曲片(第3実施形態の吸収部)
213 接続部(第2実施形態)
213a 切欠溝(追従部)
Claims (12)
- 複数の第1電極と、
一方の端部が前記第1電極と夫々電気的に接続される複数の熱電変換素子と、
該熱電変換素子の他方の端部に夫々電気的に接続される複数の第2電極とを備える熱電変換モジュールであって、
前記熱電変換素子を直列に接続した複数の直列群を備え、
該直列群を並列に接続することを特徴とする熱電変換モジュール。 - 複数の第1電極と、
一方の端部が前記第1電極と夫々電気的に接続される複数の熱電変換素子と、
該熱電変換素子の他方の端部に夫々電気的に接続される複数の第2電極とを備える熱電変換モジュールであって、
前記熱電変換素子を並列に接続した複数の並列群を備え、
該並列群を直列に接続することを特徴とする熱電変換モジュール。 - 請求項1又は請求項2に記載の熱電変換モジュールであって、
電気の入出力を行う一対の端子部を備え、
該端子部の一方は、複数の前記熱電変換モジュールを並べたときに隣り合う熱電変換モジュールの他方の端子部と隣接するように位置し、
一方の前記端子部と、隣接する前記熱電変換モジュールの他方の前記端子部とを結束部材で連結できることを特徴とする熱電変換モジュール。 - 請求項1から請求項3の何れか1項に記載の熱電変換モジュールであって、
前記第1電極又は前記第2電極には、前記熱電変換素子を位置決めする案内部が設けられることを特徴とする熱電変換モジュール。 - 請求項1から請求項4の何れか1項に記載の熱電変換モジュールであって、
前記第1電極又は前記第2電極は、表面にろう材層を備える部材で成形されることを特徴とする熱電変換モジュール。 - 請求項1から請求項5の何れか1項に記載の熱電変換モジュールであって、
前記第1電極又は前記第2電極が配置される基部を備え、該基部は、複数に分割されていることを特徴とする熱電変換モジュール。 - 請求項6記載の熱電変換モジュールであって、
前記基部は、前記並列群又は前記直列群ごとに分割されることを特徴とする熱電変換モジュール。 - 請求項1から請求項7の何れか1項に記載の熱電変換モジュールであって、
前記複数の熱電変換素子は、n形とp形との何れか一方で構成され、
前記第1電極と、隣接する前記熱電変換素子に電気的に接続される前記第2電極とを電気的に接続する接続部が設けられ、
該接続部には、前記熱電変換素子の熱膨張や熱収縮による変形への追従性を高めるように構成された追従部が設けられることを特徴とする熱電変換モジュール。 - 請求項1から請求項7の何れか1項に記載の熱電変換モジュールであって、
前記複数の熱電変換素子は、n形及びp形で構成され、
互いに隣接する前記n形の熱電変換素子と前記p形の熱電変換素子とは、前記第1電極同士又は前記第2電極同士で接続され、
該接続される第1電極同士又は前記第2電極同士は、前記第1電極又は前記第2電極の側縁から他方の電極側に向かって屈曲した後、折り返すようにして隣接する前記第1電極又は前記第2電極の側縁へと接続して、前記熱電変換素子の熱膨張による変形を吸収する吸収部を介して接続されることを特徴とする熱電変換モジュール。 - 請求項1から請求項9の何れか1項に記載の熱電変換モジュールであって、
電気の入出力を行う一対の端子部を備え、
前記端子部の少なくとも一方は、前記並列群又は前記直列群に電気的に接続される前記第1電極又は前記第2電極に、前記並列群又は前記直列群の一つの側縁に沿って折れ曲がり、前記少なくとも一方の端子部の温度上昇を抑制する折曲片を介して設けられることを特徴とする熱電変換モジュール。 - 請求項1から請求項10の何れか1項に記載の熱電変換モジュールであって、
前記第1電極は、前記熱電変換素子ごとに対応させて複数設けられ、
前記第2電極は、基部に固定されることを特徴とする熱電変換モジュール。 - 請求項11記載の熱電変換モジュールであって、
前記第2電極は、前記並列群に対応させて一体に形成されることを特徴とする熱電変換モジュール。
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- 2013-09-30 JP JP2013205420A patent/JP6193709B2/ja active Active
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2014
- 2014-06-12 EP EP14847378.8A patent/EP3054493A4/en not_active Withdrawn
- 2014-06-12 KR KR1020157035447A patent/KR20160065048A/ko not_active Application Discontinuation
- 2014-06-12 CN CN201480041720.0A patent/CN105580151B/zh not_active Expired - Fee Related
- 2014-06-12 US US15/021,498 patent/US20160233402A1/en not_active Abandoned
- 2014-06-12 WO PCT/JP2014/065653 patent/WO2015045500A1/ja active Application Filing
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Cited By (12)
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US10367131B2 (en) | 2013-12-06 | 2019-07-30 | Sridhar Kasichainula | Extended area of sputter deposited n-type and p-type thermoelectric legs in a flexible thin-film based thermoelectric device |
US10553773B2 (en) | 2013-12-06 | 2020-02-04 | Sridhar Kasichainula | Flexible encapsulation of a flexible thin-film based thermoelectric device with sputter deposited layer of N-type and P-type thermoelectric legs |
US10566515B2 (en) | 2013-12-06 | 2020-02-18 | Sridhar Kasichainula | Extended area of sputter deposited N-type and P-type thermoelectric legs in a flexible thin-film based thermoelectric device |
US11024789B2 (en) | 2013-12-06 | 2021-06-01 | Sridhar Kasichainula | Flexible encapsulation of a flexible thin-film based thermoelectric device with sputter deposited layer of N-type and P-type thermoelectric legs |
US10141492B2 (en) | 2015-05-14 | 2018-11-27 | Nimbus Materials Inc. | Energy harvesting for wearable technology through a thin flexible thermoelectric device |
US11276810B2 (en) | 2015-05-14 | 2022-03-15 | Nimbus Materials Inc. | Method of producing a flexible thermoelectric device to harvest energy for wearable applications |
US11283000B2 (en) | 2015-05-14 | 2022-03-22 | Nimbus Materials Inc. | Method of producing a flexible thermoelectric device to harvest energy for wearable applications |
US10290794B2 (en) | 2016-12-05 | 2019-05-14 | Sridhar Kasichainula | Pin coupling based thermoelectric device |
US10516088B2 (en) | 2016-12-05 | 2019-12-24 | Sridhar Kasichainula | Pin coupling based thermoelectric device |
US10559738B2 (en) | 2016-12-05 | 2020-02-11 | Sridhar Kasichainula | Pin coupling based thermoelectric device |
US20180172324A1 (en) * | 2016-12-15 | 2018-06-21 | Industrial Technology Research Institute | Thermoelectric module |
US10648708B2 (en) * | 2016-12-15 | 2020-05-12 | Industrial Technology Research Institute | Thermoelectric module |
Also Published As
Publication number | Publication date |
---|---|
JP6193709B2 (ja) | 2017-09-06 |
KR20160065048A (ko) | 2016-06-08 |
EP3054493A1 (en) | 2016-08-10 |
US20160233402A1 (en) | 2016-08-11 |
CN105580151A (zh) | 2016-05-11 |
EP3054493A4 (en) | 2017-05-03 |
CN105580151B (zh) | 2018-09-25 |
JP2015070217A (ja) | 2015-04-13 |
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