Titanium alloy flow guide body for thermal battery and manufacturing and using method thereof

Abstract

The invention relates to a titanium alloy flow guide body for a thermal battery and a manufacturing and using method thereof. And the flow guide body is made of TA1, TA2, TA3 or TA4 alloy. The manufacturing and using method comprises the following steps: preparing flow guide bodies: preparing four flow guide bodies with the thickness of 0.1 mm, the width of 4 mm and the length of 20 mm, wherein the TA1 alloy, the TA2 alloy, the TA3 alloy or the TA4 alloy is deoiled on the surface and free of an oxide layer; preparing a cover body: adjusting the current of a spot welding machine to be proper according to a common cover body guide column lead welding method of the thermal battery, respectively welding four guide bodies on a positive electrode guide column and a negative electrode guide column, arranging two guide bodies on each guide column, and then installing five 1mm asbestos sheets on each guide column; and cover body welding: covering the thermal battery equipped with the inner battery with the cover body, respectively carrying out spot welding on the positive and negative current conductors on the cover body and the positive and negative lead-out wires of the inner battery, and then assembling the thermal battery.

Description

Technical Field

[0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a titanium alloy current conductor for a thermal battery and a use method thereof. Background Art

[0002] Thermal batteries are high-temperature storage primary batteries. At room temperature, this electrolyte is solid and non-conductive. When in use, the heating element is ignited by electrical or mechanical activation. Under the action of the heating agent, the internal temperature of the battery rises rapidly, causing the electrolyte to melt to form a high-conductivity ion conductor, so that the thermal battery enters the working state and outputs electrical energy to the power system through the conductor connected to the internal battery stack and the shell guide column. Thermal batteries have the advantages of short activation time, high output power, wide operating temperature range (-50℃~70℃), long storage time, strong resistance to mechanical environment, and high reliability. At present, thermal batteries have been widely used in high-tech weapons, such as missiles, nuclear weapons, various advanced bombs, artillery shells, mines, and ignition devices of some combat weapons.

[0003] After the thermal battery is activated, as long as the eutectic salt remains in a molten state, the battery will be in working condition until the active substances participating in the reaction are exhausted. However, due to heat dissipation, once the temperature drops below the eutectic point of the electrolyte, causing the eutectic salt to re-solidify, the battery will stop working prematurely.

[0004] When the amount of electroactive material is certain and sufficient, the thermal life determines the working life of the thermal battery. A longer thermal life of the thermal battery can be achieved by adjusting the thermal design, but higher heat reduces the safety and reliability of the thermal battery.

[0005] After the thermal battery is activated, the thermal battery electric energy is output to the electrical device by connecting the internal positive terminal to the conductor at the positive output terminal on the cover, and the internal negative terminal to the conductor at the negative output terminal on the cover. The conductor has the main function of carrying the current output. At the same time, since the internal positive terminal and negative terminal of the conductor are located in the middle of the thermal battery stack, the other end of the two conductors is connected to the conductor column on the surface of the cover, which is easy to cause internal heat loss, reduce the working time of the thermal battery, and increase the temperature of the conductor column, which is not conducive to the soldering connection between the electrical appliance connection line and the conductor column, causing inconvenience to the connection.

[0006] The commonly used current conductors for thermal batteries are:

[0007] 1) Nickel materials represented by pure nickel strips, mainly in the form of nickel strips and nickel wires, are traditional guide materials for thermal batteries with mature technology;

[0008] 2) Silver materials, represented mainly by pure silver strips, mainly come in the form of silver strips and silver wires, and have the advantage of low resistivity. Summary of the invention

[0009] The present invention provides a new titanium alloy body for thermal batteries. The body can be used in thermal batteries to effectively extend the thermal life and working life of the thermal batteries and reduce the amount of heating agent. At the same time, the temperature of the body can be reduced, which is conducive to the soldering connection between the electrical connection line and the body.

[0010] The present invention is achieved by the following technical solutions:

[0011] A titanium alloy current conductor for a thermal battery, the material of which is TA1, TA2, TA3 or TA4 alloy.

[0012] A method for manufacturing and using a titanium alloy current conductor for a thermal battery comprises the following steps:

[0013] Preparation of the flow guide body: Prepare TA1, TA2, TA3 or TA4 alloy with degreased surface and no oxide layer. Requirements: four flow guide bodies with a thickness of 0.1mm, a width of 4mm and a length of 20mm;

[0014] Cover preparation: According to the common cover guide column lead welding method for thermal batteries, adjust the spot welding machine current to a suitable level, and weld four guides to the positive and negative guide columns respectively, two for each guide column, and then install five 1mm asbestos sheets;

[0015] Cover welding: Put the cover on the hot battery with the inner battery installed, spot weld the positive and negative current conductors on the cover to the positive and negative lead wires of the inner battery respectively, and then complete the assembly of the hot battery.

[0016] The current conductor of the present invention retains the advantages of nickel metal current conductors used in existing thermal batteries, such as easy welding, easy bending, and high conductivity, and has the following significant effects:

[0017] Firstly, the present invention is applied to a thermal battery, which can reduce the speed at which heat in the thermal battery is dissipated outward, thereby extending the thermal life and working life of the thermal battery;

[0018] Secondly, the temperature of the guide column can be reduced, which is conducive to the reliable connection between the guide column and the wires for the thermal battery to output electrical energy. DETAILED DESCRIPTION

[0019] The first technical problem to be solved by the present invention is to retain the relatively high electrical conductivity of the conductor, thereby retaining its good electrical conductivity.

[0020] The second technical problem to be solved by the present invention is to retain the relatively easy-to-bend property of the flow guide body, thereby retaining its good operability.

[0021] The third technical problem to be solved by the present invention is to retain the property of the conductor that it is easier to connect by welding, thereby retaining its good weldability, connectability, and good electrical conductivity.

[0022] The fourth technical problem to be solved by the present invention is to retain the good high-temperature corrosion resistance of the current conductor to the internal environment of the heat-resistant battery, thereby retaining its good temperature resistance and mechanical properties and ensuring the reliable realization of its conductive function.

[0023] The titanium alloy current conductors for thermal batteries of the present invention include: TA1, TA2, TA3, and TA4.

[0024] Practical application: A flow conductor with a thickness of 0.1 mm, a width of 4 mm, and a length of 40 mm of the present invention is used in a certain type of thermal battery, and the temperature of the flow conductor column of the thermal battery is reduced by 10°C.

[0025] Example:

[0026] Preparation of the flow guide body: Prepare TA1 alloy with a degreased surface and no oxide layer. Requirements: 4 flow guide bodies with a thickness of 0.1mm, a width of 4mm, and a length of 20mm.

[0027] Cover preparation: According to the common cover guide column lead welding method for thermal batteries, adjust the spot welding machine current to the appropriate level, and weld four 0.1mm thick, 4mm wide, 20mm long guides to the positive and negative guide columns, two for each guide column. Then install five 1mm asbestos sheets.

[0028] Cover welding: Put the cover on the hot battery with the inner battery installed, spot weld the positive and negative current conductors on the cover to the positive and negative lead wires of the inner battery respectively, and then complete the assembly of the hot battery.

[0029] Practical application: The TA1 flow-conducting thermal battery of the present invention is used in a certain type of thermal battery, and the working time of the thermal battery is 36 seconds. The surface temperature of the flow-conducting column is 60° C. (when working for 20 seconds).

[0030] Comparative Example:

[0031] Preparation of the flow conductor: Use pure nickel strips, requirements: 4 flow conductors with a thickness of 0.1mm, a width of 4mm, and a length of 20mm.

[0032] Cover preparation: According to the common cover guide column lead welding method for thermal batteries, adjust the spot welding machine current to the appropriate level, and weld four 0.1mm thick, 4mm wide, 20mm long guides to the positive and negative guide columns, two for each guide column. Then install five 1mm asbestos sheets.

[0033] Cover welding: Put the cover on the hot battery with the inner battery installed, spot weld the positive and negative current conductors on the cover to the positive and negative lead wires of the inner battery respectively, and then complete the assembly of the hot battery.

[0034] Practical application: Pure nickel strip flow guide is used in a certain type of thermal battery, the working time of which is 33s. The surface temperature of the flow guide column is 670℃ (when working for 20s).

[0035] From the above results, it can be seen that using the TA1 titanium alloy current guide body of the present invention in a thermal battery can effectively extend the working life of the thermal battery and reduce the surface temperature of the current guide column.

Claims

1. A titanium alloy current conductor for a thermal battery, characterized in that: The material is TA1, TA2, TA3 or TA4 alloy.

2. A method for making and using a titanium alloy current conductor for a thermal battery, characterized in that: The following steps are involved: Preparation of the flow guide body: Prepare TA1, TA2, TA3 or TA4 alloy with degreased surface and no oxide layer. Requirements: four flow guide bodies with a thickness of 0.1mm, a width of 4mm and a length of 20mm; Cover preparation: According to the common cover guide column lead welding method for thermal batteries, adjust the spot welding machine current to a suitable level, and weld four guides to the positive and negative guide columns respectively, two for each guide column, and then install five 1mm asbestos sheets; Cover welding: Put the cover on the hot battery with the inner battery installed, spot weld the positive and negative current conductors on the cover to the positive and negative lead wires of the inner battery respectively, and then complete the assembly of the hot battery.