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INVENTION
Russian Federation Patent RU2280919
thermoelectric battery
Name of the inventor: Tagir Ismailov Abdurashidovich (RU); Verdiev Mikail Gadzhimagomedovich (RU); Evdulov Oleg (RU)
The name of the patentee: Dagestan State Technical University (DSTU) (RU)
Address for correspondence: 367015, Makhachkala, etc. Imam Shamil, 70, DSTU, Intellectual Property Department.
Starting date of the patent: 2004.04.23
The invention relates to a thermoelectric instrument engineering, in particular to the structure of the thermoelectric battery (TEB).
The technical result of conjugation with the simplification of the TEB is cooled (heated) object or source of heat and teplosbrosa system interfaced with finding objects in hard to reach places. TEB comprises serially connected to an electrical circuit semiconductor thermocouples, each of which is formed by two branches made of a semiconductor, respectively p and n-type. The branches of thermocouples located along the line. Switching elements are designed as flexible electrically insulated heating conduits - with copper bars at the ends of the pads made of conductive material. The first contact pads connected to the both sides with the branches of the semiconductor p- and n-type. Second bonding pads are electrically connected to each other pads made in the form of films or metal alloy deposited on the ceramic plates - heat transmission, or in the form of copper plates soldered on the film contacts Insulated ceramic plate. Switching all even plates are connected to one and the odd - to another heat transmission.
DESCRIPTION OF THE INVENTION
The invention relates to a thermoelectric instrument engineering, in particular to the structure of the thermoelectric battery (TEB).
TEB is the prototype of the invention described in [1]. TEB consists of series-connected in the electrical circuit in the form of semiconductor thermocouples meanders, each of which is formed by two branches (columns, made either cylindrical or a rectangular parallelepiped), respectively made of a semiconductor p- and n-type. Branch thermocouples are interconnected along the line by switching solid plates made usually of copper. The electrically series-connected switching plates thermocouples forming TEB, enclosed between two high heat insulating plates - heat transmission (usually ceramic).
The disadvantage of the known design is the impossibility of mechanical decoupling object cooling, TEB and teplosbrosa system, but also the complexity of interfacing with a cooled (heated) object in the case of TEB as a refrigerator and teplopodvodyaschim (heat sink) unit in the case of TEB as a thermoelectric generator, placed in hard to reach spaced apart locations, including being part of the unit with close packing elements, or placed in a sealed volume.
To eliminate this drawback claimed TEB, switching elements which are in the form of flexible heat conductors electrically insulated from the pads at the ends, some pads that are connected on both sides with the branches of p- semiconductors and n-type, and the second contact pads - electrically insulated from each other pads made in the form of films of metals or alloys deposited on a ceramic plate - heat transmission, or in the form of copper plates soldered on Insulated film contacts the ceramic plate, and all the even switching plates are connected to one and the odd - to another heat transmission - the ceramic plate.
TEB design shown in FIG.
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TEB comprises serially connected to an electrical circuit semiconductor thermocouples, each of which is formed by two branches (columns, made either cylindrical or a rectangular parallelepiped), respectively made of a semiconductor p- and n-type 1 and 2. The branches 1 and 2 are arranged thermoelements along a line, and switching elements 3 and 4 are in the form of flexible electrically insulated from each other by heat conductors - copper bars 5 with the contact pads 6 and 7 at the ends, made of a conductive material. The contact pads 6 are connected on both sides with the branches semiconductor p- and n-type 1 and 2 and the contact pads 7 - electrically insulated from each other pads 8 are designed as films of metals or alloys deposited on a ceramic plate - heat transmission 9 or in the form of copper plates soldered on the film contacts Insulated ceramic plate, and all the even switching plate 4 connected to one and three odd - other heat transmission. Contacts 10 serve to supply electric power to the fuel mix in case of its use as a thermoelectric cooler and discharge electric power of TEB in the case of its use as a thermoelectric generator. |
The thermoelectric cooler TEB mode operates as follows.
When passing through the TEB constant electric current supplied from the power supply through the contacts 10, between the switching elements 3 and 4 contacts branches representing p and n-type 1 and 2, there is a temperature difference caused by the absorption and release of heat in the Peltier field connection branch of the p-type 1 - pad 6 - branch 2 of n-type and n-type branch 2 - pad 6 - branch of the p-type 1. When an electric current indicated on the drawing polarity heats switching elements 3 and the cooling switching elements 4 . Accordingly, there is a cooling of the upper heat transmission 9 in contact through the electrically isolated areas with switching elements 3. If at the same time due to the heat sink temperature of the lower heat transmission 9 in contact through the site 8 with switching elements 3, is maintained at a constant level, the temperature of the upper heat transmission that is in thermal contact with the switching elements via the contact pads 4 8 falls below a certain value. When a predetermined electric current value of temperature reduction on the upper heat transmission 9 will depend on the heat load thereon. Thermal load consists of heat leak from the environment, heat from the hot contacts due to thermal conductivity forming TEB branches Joule heat but also the heat coming from the cooling object.
The proposed performance of TEB will allow mechanically flexible joint cooled object (heat source) and teplosbrosa system, and contact with a cooled (heated) object in a remote place by a specially designed switching elements (length and flexibility), the heat loss in the switching the elements will be negligible.
TEB in a thermoelectric generator mode operates as follows.
In the presence of a heat source, heating, for example, lower heat transmission 9a and have with it a direct thermal contact between the switching elements 3, and a system to dissipate heat from the upper heat transmission 9 and switching element 4, between the switching elements 3 and 4 set certain temperature difference. If there is such a difference in temperature between the connection plates 3 and 4, contacting the branches of the p- and n-type 1 and 2, between the contacts 10, a potential difference - thermal emf due to the Seebeck effect.. With the closure of the contacts 10 for a given electrical load circuit formed there a constant electric current. The amount of electric current flowing through the circuit is dependent on the thermal emf., Which in turn depends on the coefficient of thermal emf. a thermoelectric material, the number of thermocouples in the TEB, the temperature difference between the switching elements 3 and 4 and the value of electrical load.
The advantage of using this design is to allow the flexible coupling element of heat, TEB and teplosbrosa system and heat transmission and easy to interface with the system 9, dissipating heat, and the heat source, located in remote and distant places from each other.
USED BOOKS
BS Pozdnyakov, Koptelov EA Thermoelectric energy. M .: Atomizdat 1974.
CLAIM
Thermoelectric battery, consisting of serially connected to an electrical circuit by means of switching semiconductor elements of thermocouples, each of which is formed by two branches made of a semiconductor, respectively p and n-type, made between two heat transmission, characterized in that the switching elements are in the form of flexible electrically insulated heat conductors with the contact pads on the ends of which some pads are connected on both sides with the branches of p- semiconductors and n-type, and the second contact pads - electrically insulated from each other contacts are in the form of films or metal alloy deposited on the heat transmission - ceramic plate, or in the form of copper plates soldered on the film contacts Insulated ceramic plate, and all the even switching elements are connected to one and the odd - heat transmission to another - the ceramic plate.
print version
Publication date 02.12.2006gg
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