Heat source structure for thermoelectric battery

Abstract

The utility model provides a heat source structure for a thermoelectric battery, which comprises a shell, an insulation fixing part is arranged in the shell, and an electric heating part is arranged in the insulation fixing part and is matched with the insulation fixing part. The heat source structure has the beneficial effects that the firmness of the electric heating part is ensured, the overall mechanical property and sealing property of the heat source structure are improved, external harmful gas is prevented from entering the heat source and corroding the electric heating part, the reliability of long-term working of the heat source for the thermoelectric battery is effectively improved, and the service life of the heat source for the thermoelectric battery is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of thermoelectric battery technology, and in particular relates to a heat source structure for thermoelectric batteries. Background Technology

[0002] A thermoelectric battery is a battery device that uses the Seebeck effect of thermoelectric materials to convert heat from an internal heat source into electrical energy. Typically, thermoelectric batteries use isotopic heat sources, generating electricity through the decay heat of these heat sources. Because the energy of this type of battery primarily originates from within the battery itself and does not depend on external energy input, it has strong environmental adaptability and can operate in environments where low temperatures, darkness, and other conditions are difficult to address with conventional power sources.

[0003] However, due to the radioactivity of isotope heat sources, other heat sources are used instead during the development and testing of thermoelectric batteries, taking into account safety concerns. Generally, an electric heating source is chosen as the alternative. The main function of this type of heat source is to convert externally input electrical energy into heat energy through an electric heating circuit and supply it to the thermoelectric conversion device inside the thermoelectric battery. Therefore, the preparation of the heat source for thermoelectric batteries has become one of the key technologies in thermoelectric battery development.

[0004] Currently, the heat sources used in the research and testing of thermoelectric batteries are typically designed according to standards for use in ordinary environments, without considering the mechanical environmental requirements for extreme applications. Therefore, they cannot pass the mechanical environmental tests required for related products. Furthermore, the lifespan of the heat source is also problematic; under prolonged operation, the heating wire is prone to breakage, causing an open circuit in the heating circuit and resulting in the overall failure of the heat source. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a heat source structure for thermoelectric batteries, which effectively solves the technical problems of poor mechanical properties and short service life of the heat source structure for thermoelectric batteries during the research and development and testing process, and overcomes the shortcomings of the prior art.

[0006] The technical solution adopted by this utility model is: a heat source structure for a thermoelectric battery, including a shell, an insulating fixing part inside the shell, an electric heating part inside the insulating fixing part, and the insulating fixing part and the electric heating part being adapted to each other.

[0007] Furthermore, a sealing cover is provided on the top of the outer casing.

[0008] Furthermore, the sealing cover is provided with electrodes, which are inserted into the insulating fixing part and connected to the electric heating part.

[0009] Furthermore, a sealing member is provided at the connection between the electrode and the sealing cover.

[0010] Further, the insulation fixing part is provided with a first accommodating groove for placing the electric heating part, and the first accommodating groove is matched with the electric heating part.

[0011] Further, an end of the first accommodating groove is provided with a second accommodating groove for inserting the electrode, and the second accommodating groove is arranged in the insulation fixing part.

[0012] Further, the electric heating part is arranged as a heating wire or a heating rod.

[0013] Further, the insulation fixing part is arranged as an integrally-formed ceramic structure.

[0014] Further, the sealing element is arranged as a ceramic sealing element.

[0015] Further, the electric heating part is arranged as an iron-chromium-aluminum alloy structure.

[0016] The utility model has the advantages and positive effects that: the firmness of the electric heating part is ensured, the mechanical property and the sealing property of the heat source structure as a whole are improved, the harmful gas outside is prevented from entering the heat source inside to corrode the electric heating part, the reliability of the heat source for thermoelectric cell long-term work is effectively improved, and the service life of the heat source for thermoelectric cell is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic view of a heat source structure for thermoelectric cell according to an embodiment of the utility model.

[0018] Figure 2 is a schematic view of a heat source structure for thermoelectric cell according to another embodiment of the utility model.

[0019] In the drawing:

[0020] 1, shell 2, insulation fixing part 3, electric heating part

[0021] 4, sealing cover body 5, electrode 6, sealing element

[0022] 7, first accommodating groove 8, second accommodating groove DETAILED DESCRIPTION

[0023] The utility model embodiment provides a heat source structure for thermoelectric cell, and the following will be described with reference to the drawings.

[0024] In the description of the utility model embodiments, it is understood that the orientation or position relationship indicated by the terms "top", "bottom" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In the description of the utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] As shown in Figure 1 and Figure 2 The utility model discloses a heat source structure for thermoelectric cell, including shell 1, be equipped with insulating fixed part 2 in shell 1. Shell 1 and the outside of insulating fixed part 2 are adapted, and are wrapped in the outside of insulating fixed part 2. Electric heating part 3 is equipped in insulating fixed part 2, and insulating fixed part 2 and electric heating part 3 are adapted. Insulating fixed part 2 is arranged outside electric heating part 3, not only can fix electric heating part 3, guarantee the firmness of electric heating part 3, can also play the role of protection on the outside of electric heating part 3, improve the mechanical properties of heat source structure whole. Preferably, insulating fixed part 2 adopts the ceramic material of good processing performance and is integrally formed, and the structure of inside and electric heating part 3 is adapted, when being impacted by external environment, can guarantee good mechanical properties, guarantee the normal work of electric heating part 3.

[0026] Specifically, the top of the shell 1 is provided with a sealing cover 4. The sealing cover 4 is fixedly connected with the shell 1, which ensures the sealing of the whole shell.

[0027] Specifically, the sealing cover 4 is provided with an electrode 5, and the electrode 5 is inserted into the insulating fixed part 2 and connected with the electric heating part 3. The electrode 5 is fixedly connected with the sealing cover 4.

[0028] Specifically, in order to ensure the sealing property of the connection between the electrode 5 and the sealing cover 4, a sealing element 6 is fixedly arranged at the connection between the electrode 5 and the sealing cover 4. Preferably, the sealing element 6 is a ceramic sealing element 6. The electrode 5 penetrates through the sealing element 6 and is welded with the sealing element 6, and the sealing element 6 is welded with the sealing cover 4.

[0029] Specifically, the insulation fixing part 2 is provided with a first accommodating groove 7 for placing the electric heating part 3, and the first accommodating groove 7 is matched with the electric heating part 3. The electric heating part 3 placed in the first accommodating groove 7 will not shake. The end of the first accommodating groove 7 is provided with a second accommodating groove 8 for inserting the electrode 5, and the second accommodating groove 8 is arranged in the insulation fixing part 2 and is arranged close to the sealing cover 4 and is communicated with the end of the first accommodating groove 7.

[0030] Specifically, the electric heating part 3 is arranged as an electric heating wire or an electric heating rod.

[0031] Specifically, the electric heating part 3 is arranged as an iron-chromium-aluminum alloy structure.

[0032] The manufacturing method of the heat source structure for the thermoelectric cell comprises the following steps:

[0033] (1) According to the power requirement of the heat source for the thermoelectric cell, the length and shape of the electric heating part 3 are designed, and the electric heating part 3 is manufactured;

[0034] (2) The insulation fixing part 2 is designed according to the length and shape of the electric heating part 3, the first accommodating groove 7 and the second accommodating groove 8 are reserved, the first accommodating groove 7 is matched with the electric heating part 3, and the ceramic material is integrally formed.

[0035] (3) The electric heating part 3 is placed in the first accommodating groove 7, and the first accommodating groove 7 is matched with the electric heating part 3 and will not shake.

[0036] (4) The electrode 5 is inserted through the sealing element 6 and is welded and fixed with the sealing element 6, and then the sealing element 6 is welded and fixed with the sealing cover 4.

[0037] (5) The electric heating part 3 is welded with the electrode 5, the electrode 5 is inserted into the second accommodating groove 8, and then the whole is placed in the shell 1, and the shell 1 is welded with the sealing cover 4.

[0038] After the assembly is completed, the mechanical environment test is carried out, the heat source for the thermoelectric cell is subjected to the identification level random vibration, sinusoidal vibration, acceleration and impact test, the resistance of the electric heating part 3 after the test is the same as before the test, and the electric heating part 3 does not break.

[0039] The heat vacuum test is carried out on the heat source for the thermoelectric cell, under the condition that the input power is 120W, the wall surface temperature of the heat source is 500℃, the test period is set to 3 months, and the heat source works normally within the test period.

[0040] Example one: as Figure 1As shown, a heat source structure for a thermoelectric battery includes a housing 1, with an insulating fixing part 2 inside the housing 1. The housing 1 is adapted to the outside of the insulating fixing part 2 and wraps around the outside of the insulating fixing part 2. An electric heating part 3 is provided inside the insulating fixing part 2. The electric heating part 3 is specifically a spiral heating wire. The insulating fixing part 2 is an integrally formed ceramic structure. A first receiving groove 7 and a second receiving groove 8 are reserved inside the insulating fixing part 2. The first receiving groove 7 is used to place the heating wire and is adapted to fit the heating wire, so that the heating wire will not shake when placed in the first receiving groove 7. The first receiving groove 7 is bent inside the insulating fixing part 2, and the second receiving groove 8 is provided at both ends of the first receiving groove 7 for inserting electrodes 5. The second receiving groove 8 is located inside the insulating fixing part 2, close to the sealing cover 4, and communicates with the end of the first receiving groove 7. The spiral heating wire passes through the first receiving groove 7 and is welded to the electrodes 5 at both ends. A sealing cover 4 is welded to the top of the outer casing 1. A ceramic sealing member 6 is welded to the sealing cover 4 at a position relative to the second receiving groove 8. An electrode 5 is welded to the ceramic sealing member 6.

[0041] Example 2: Figure 2 As shown, a heat source structure for a thermoelectric battery includes a housing 1, with an insulating fixing part 2 inside the housing 1. The housing 1 is adapted to the outside of the insulating fixing part 2, wrapping around the outside of the insulating fixing part 2. An electric heating part 3 is provided inside the insulating fixing part 2. The electric heating part 3 is specifically a columnar heating rod. The insulating fixing part 2 is an integrally formed ceramic structure. A first receiving groove 7 and a second receiving groove 8 are reserved inside the insulating fixing part 2. The first receiving groove 7 is used to place the electric heating part 3, which is adapted to the heating rod, and the heating rod will not shake when placed in the first receiving groove 7. The first receiving groove 7 is vertically arranged inside the insulating fixing part 2, and a second receiving groove 8 is provided at the end of the first receiving groove 7 for inserting an electrode 5. The second receiving groove 8 is located inside the insulating fixing part 2, near the sealing cover 4, and communicates with the end of the first receiving groove 7. The columnar heating rod is placed in the first receiving groove 7, and its end is welded to the electrode 5. A sealing cover 4 is welded to the top of the outer casing 1. A ceramic sealing member 6 is welded to the sealing cover 4 at a position relative to the second receiving groove 8. An electrode 5 is welded to the ceramic sealing member 6.

[0042] The advantages and positive effects of this utility model are:

[0043] (1) The insulating fixing part is integrally formed with a ceramic material with good machinability. The internal shape is adapted to the electric heating part, which not only ensures the fixing effect of the insulating fixing part on the electric heating part, but also improves the overall mechanical properties.

[0044] (2) The ceramic sealing component achieves overall sealing of the shell structure, preventing harmful gases from the outside of the thermoelectric battery heat source from entering the heat source and corroding its electric heating part. This effectively improves the reliability of the thermoelectric battery heat source during long-term operation and extends the service life of the thermoelectric battery heat source.

[0045] The embodiments of the present application are described in detail above, but the content described is only the preferred embodiments of the present application, and cannot be considered as limiting the scope of the embodiments of the present application. Any equivalent changes and improvements made within the scope of the present application should still belong to the patent coverage of the present application.

Claims

1. A heat source structure for a thermoelectric battery, characterized in that: The device includes an outer casing, an insulating fixing part inside the outer casing, an electric heating part inside the insulating fixing part, the insulating fixing part and the electric heating part being adapted to each other, a sealing cover on the top of the outer casing, an electrode on the sealing cover, and the electrode being inserted into the insulating fixing part and connected to the electric heating part.

2. The heat source structure for a thermoelectric battery according to claim 1, characterized in that: A sealing element is provided at the connection between the electrode and the sealing cover.

3. A heat source structure for a thermoelectric battery according to claim 1 or 2, characterized in that: The insulating fixing part is provided with a first receiving groove for placing the electric heating part, and the first receiving groove is adapted to the electric heating part.

4. The heat source structure for a thermoelectric battery according to claim 3, characterized in that: The first receiving groove has a second receiving groove at its end for inserting the electrode, and the second receiving groove is disposed within the insulating fixing part.

5. A heat source structure for a thermoelectric battery according to any one of claims 1-2 and 4, characterized in that: The electric heating element is configured as a heating wire or a heating rod.

6. A heat source structure for a thermoelectric battery according to any one of claims 1-2 and 4, characterized in that: The insulating fixing part is configured as an integrally formed ceramic structure.

7. The heat source structure for a thermoelectric battery according to claim 2, characterized in that: The sealing element is a ceramic sealing element.

8. A heat source structure for a thermoelectric battery according to any one of claims 1-2 and 4, characterized in that: The electric heating element is constructed of an iron-chromium-aluminum alloy.

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