A method of rigidly securing an electric ignition head

By designing a rigid pressure plate and using ultrasonic welding, the problem of unstable fixing of the electric ignition head in the thermal battery was solved, the connection reliability was improved and the use of organic matter was reduced, and the stability and mechanical resistance of the electric ignition head were achieved.

CN116592388BActive Publication Date: 2026-06-16XIAN NORTH QINGHUA ELECTRIC APP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XIAN NORTH QINGHUA ELECTRIC APP CO LTD
Filing Date
2023-05-11
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

The electric ignition head in existing thermal batteries is not securely fixed, has poor resistance to mechanical environments, and uses organic silicone rubber, resulting in unreliable connections.

Method used

The design and fabrication of rigid insulating material bearing plates, the connection of electric ignition head wires to terminals via ultrasonic welding to replace the traditional mechanical winding method, and the reduction of organic matter in the battery cover.

Benefits of technology

This design achieves a secure fixation of the electric ignition head, preventing displacement and wire breakage caused by mechanical factors, improving connection reliability, and reducing the amount of organic matter used.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application relates to a kind of rigid fixed electric ignition head method, belong to thermal battery technical field.The present application designs and processes the pressure plate of fixed electric ignition head, so that the wire of electric ignition head soft state is arranged in the pressure plate and is firmly fixed on the pressure plate, is assembled into electric ignition head assembly, electric ignition head assembly is installed on cover body, and is made into combined battery cover.The present application is fixed by designing pressure plate, rigid fixed electric ignition head, fixed firmly, and the condition that the shift of electric ignition head occurs due to mechanical environment, wire and connecting lead break is eliminated from design, the present application uses PC ultrasonic spot welding machine and nickel lead on electric ignition head wire and terminal post are welded, more reliable than the connection of traditional lead winding nickel lead, the present application is fixed by designing pressure plate rigid fixed electric ignition head, and reduces the amount of organic matter used in thermal battery.
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Description

Technical Field

[0001] This invention belongs to the field of thermal batteries, and specifically relates to a method for rigidly fixing an electric ignition head. Background Technology

[0002] A thermal battery is a disposable, stored chemical power source. Its electrolyte is a low-melting-point eutectic salt composed of two or more inorganic salts. At room temperature, this electrolyte is solid and non-conductive. In use, an electric current activates the ignition head, or an impact mechanism strikes (punctures) the flame cap, igniting the internal heating element. This generates heat, causing the electrolyte to melt and form a highly conductive ionic conductor, thus activating the thermal battery and providing electrical energy to the power system for a short time. A thermal battery mainly consists of a battery cover, a battery casing, and a stack, such as... Figure 1 As shown.

[0003] Currently, the cover of the thermal battery pack consists of a cover plate, leads, an electric ignition head, and asbestos pads. The traditional method is to weld the leads to the terminals using an energy storage spot welding machine. Two asbestos pads are then drilled with a flat chisel to align with the terminals on the cover. The two asbestos pads are then threaded onto the cover in sequence, aligned with the terminals. A φ0.6 polytetrafluoroethylene tube is then threaded through the electric ignition head wires. The two wires of one electric ignition head are wrapped around the leads on the terminals at least twice, leaving 5mm of the lead wire. The rest is then cut off, and the remaining 5mm of lead wire is folded outwards to wrap around the electric ignition head wires. An irregularly shaped asbestos pad is then trimmed to fix the electric ignition head. The electric ignition head wires are fixed into the grooves of the irregularly shaped asbestos pads with 704 silicone rubber. Finally, two perforated asbestos pads are threaded onto the cover.

[0004] Existing technologies have drawbacks such as unreliable wiring connections for electric ignition heads, displacement of the electric ignition heads under mechanical conditions, and the use of organic silicone rubber in the manufacturing process. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] The technical problem to be solved by the present invention is how to provide a method for rigidly fixing an electric ignition head, so as to solve the technical problems of poor firmness and poor mechanical resistance of the fixed electric ignition head in the prior art.

[0007] (II) Technical Solution

[0008] To solve the above-mentioned technical problems, the present invention proposes a method for rigidly fixing an electric ignition head, the method comprising the following steps:

[0009] S1. Design and fabricate the pressure plate for fixing the electric ignition head.

[0010] S11. The pressure plate is made of rigid insulating material and machined into a circular shape;

[0011] S12. A first through hole of a first diameter is machined in the center of the pressure plate to hold the propellant head of the electric ignition head;

[0012] S13. A T-shaped groove is milled on one side of the pressure plate, and an I-shaped groove is milled on the other side, wherein the I-shaped groove is connected to the slot of the first through hole; the small end of the T-shaped groove and the two ends of the I-shaped groove are at the same position on the pressure plate.

[0013] S14. Two second through holes of the second diameter are machined at both ends of the "I"-shaped groove for the electric ignition head wire to pass through the pressure plate;

[0014] S15. Two third-diameter through holes are machined at the large end of the "T"-shaped groove for the electric ignition head wire to be led out.

[0015] S2. Assemble the electric ignition head assembly into a combined battery cover.

[0016] S21. First, weld nickel leads to the terminal blocks of the cover;

[0017] S22. Take 3 asbestos pads, use a flat chisel to drill holes in the asbestos pads according to the position of the terminal on the cover, and put the asbestos pads on the terminal on the cover. At this time, bend the positive and negative nickel leads down and lead them outward in the radial direction.

[0018] S23. Take the ignition head and put a polytetrafluoroethylene tube on the ignition head wire. Then, firmly insert and wrap the ignition head wire around the pressure plate according to the ignition head wire installation method. Insert the assembled ignition head assembly into the terminal block.

[0019] S24. Ultrasonically weld the electric ignition head wires from the electric ignition head assembly to the two leads of the corresponding terminals, and then press them down after welding.

[0020] S25. Several asbestos pads with central holes are threaded onto the cover to make a combined battery cover.

[0021] Furthermore, the thickness of the bearing plate is 2mm-4mm.

[0022] Furthermore, the depth of the "T"-shaped groove and the "I"-shaped groove is 0.5mm-1mm.

[0023] Furthermore, the pressure plate is made of 3240 epoxy phenolic laminate material according to GB / T1303.1-1998.

[0024] Furthermore, the first diameter > the third diameter > the second diameter.

[0025] Furthermore, the wiring installation method of the electric ignition head is as follows: the wire of the electric ignition head extends from the first through hole to the "I" shaped groove, extends to the second through hole on both sides of the "I" shaped groove, passes through the pressure plate from the second through hole, extends along the "T" shaped groove to the third through hole, and is led out after passing through the third through hole to form an electric ignition head assembly.

[0026] Further, step S25 includes: inserting 2-3 asbestos pads with central holes onto the cover body to form a combined battery cover.

[0027] Furthermore, in S23, one asbestos pad with a central hole is first inserted, then the electric ignition head assembly is inserted, and then two asbestos pads with central holes are inserted in S25.

[0028] Further, step S24 specifically includes: placing the electric ignition head wire from the electric ignition head assembly into the middle of the two leads of the corresponding terminal, and performing ultrasonic welding, and then pressing it down after welding.

[0029] Furthermore, PC series ultrasonic spot welders are used to weld wires and leads.

[0030] (III) Beneficial Effects

[0031] This invention proposes a method for rigidly fixing an electric ignition head. The advantages and positive effects of this invention are:

[0032] 1. This invention uses a pressure plate to rigidly fix the electric ignition head, such as... Figure 3 As shown, it is firmly fixed, and the design eliminates the possibility of the electric ignition head shifting or the wires and connecting leads breaking due to mechanical environment.

[0033] 2. This invention, through a unique design, uses a PC ultrasonic spot welding machine to weld the electric ignition head wires and the nickel leads on the terminals, such as... Figure 7 As shown, this connection method is more reliable than the traditional lead-wound nickel lead connection, which involves mechanical winding and then pressing, while this method uses ultrasonic welding to fuse the leads together, resulting in low contact resistance.

[0034] 3. This invention replaces the irregularly shaped asbestos pad by designing a pressure plate to rigidly fix the electric ignition head. This eliminates the need for polytetrafluoroethylene tubing and 704 glue during the battery cover manufacturing process, thereby reducing the amount of organic matter used inside the thermal battery. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the thermal battery structure of the present invention;

[0036] Figure 2 This is a schematic diagram of the combined battery cover of the present invention;

[0037] Figure 3This is a schematic diagram of the electric ignition head assembly of the present invention;

[0038] Figure 4 Schematic diagram of an electric ignition head;

[0039] Figure 5 This is a schematic diagram of the pressure plate of the present invention;

[0040] Figure 6 Schematic diagram of an asbestos mat;

[0041] Figure 7 This is a diagram of the actual wiring connection for the generator's ignition head. Detailed Implementation

[0042] To make the objectives, contents, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0043] To address the technical problems of poor stability and poor mechanical resistance of fixed electric ignition heads in existing technologies, this invention provides a method for rigidly fixing electric ignition heads.

[0044] This invention provides a method for rigidly fixing an electric igniter head to solve the technical problems existing in prior art. The method was designed and tested according to this concept. The technical solution adopted by this invention to solve the technical problems existing in prior art is as follows:

[0045] S1. Design and fabricate the pressure plate for fixing the electric ignition head.

[0046] S11, The pressure plate is made of rigid insulating material, such as Figure 5 As shown, the design thickness is 2mm-4mm, and it is machined into a circular shape;

[0047] S12. A first through hole of a first diameter is machined in the center of the pressure plate to hold the propellant head of the electric ignition head;

[0048] S13. A T-shaped groove is milled on one side of the pressure plate, and an I-shaped groove is milled on the other side. The groove depth is 0.5mm-1mm. The I-shaped groove is connected to the first through hole. The small end of the T-shaped groove and the two ends of the I-shaped groove are at the same position on the pressure plate.

[0049] S14. Two second through holes of the second diameter are machined at both ends of the "I"-shaped groove for the electric ignition head wire to pass through the pressure plate;

[0050] S15. Two third-diameter through holes are machined at the large end of the "T"-shaped groove for the electric ignition head wire to be led out.

[0051] The wiring installation method of the electric ignition head is as follows: The wire of the electric ignition head extends from the first through hole to the "I" shaped groove, extends to the second through hole on both sides of the "I" shaped groove, passes through the pressure plate from the second through hole, extends along the "T" shaped groove to the third through hole, and is led out after passing through the third through hole to form the electric ignition head assembly.

[0052] This unique design of the wire arrangement and placement allows the flexible wires of the electric ignition head to be threaded and securely fixed within the pressure plate, assembling into an electric ignition head assembly, such as... Figure 3 As shown;

[0053] Based on document review, 3240 epoxy phenolic laminate (GB / T1303.1-1998) material, known for its good insulation, toughness, and tensile strength, was selected for processing the pressure plate.

[0054] Among them, the first diameter > the third diameter > the second diameter.

[0055] S2. Assemble the electric ignition head assembly into a combined battery cover.

[0056] S21. First, weld nickel leads to the terminal blocks of the cover;

[0057] S22. Take 3 asbestos pads, use a flat chisel to drill holes in the asbestos pads according to the position of the terminal on the cover, and put the asbestos pads on the terminal on the cover. At this time, bend the positive and negative nickel leads down and lead them outward in the radial direction.

[0058] S23. Take the ignition head and put a polytetrafluoroethylene tube on the ignition head wire. Then, firmly insert and wrap the ignition head wire around the pressure plate according to the ignition head wire installation method. Insert the assembled ignition head assembly into the terminal block.

[0059] S24. Insert the electric ignition head wire from the electric ignition head assembly into the middle of the two leads of the corresponding terminal, and perform ultrasonic welding. After welding, press it down.

[0060] S25. Insert 2-3 asbestos pads with center holes onto the cover body to form a combined battery cover. Alternatively, in S23, first insert one asbestos pad with a center hole, then insert the electric ignition head assembly, and then in S25 insert two more asbestos pads with center holes, as shown. Figure 2 As shown.

[0061] This invention provides a welding method for the electric ignition head wire and the cover lead wire. After testing and screening various welding methods, the PC series ultrasonic spot welding machine is used to weld the wire and lead wire.

[0062] Example 1:

[0063] See attached document Figures 1-7A combined battery cover stack consists of a cover body, leads, an electric ignition head assembly, an asbestos pad, etc. A schematic diagram of the combined battery cover is shown below. Figure 2 See electric ignition head assembly. Figure 3 Electric ignition head, such as Figure 4 As shown, the pressure plate is as follows Figure 5 As shown, using a PC series ultrasonic spot welding machine, such as Figure 7 The welding of the electric ignition head wires and leads is shown. After welding, an asbestos pad is inserted to make a combined battery cover.

[0064] The advantages and positive effects of this invention are:

[0065] 1. This invention uses a pressure plate to rigidly fix the electric ignition head, such as... Figure 3 As shown, it is firmly fixed, and the design eliminates the possibility of the electric ignition head shifting or the wires and connecting leads breaking due to mechanical environment.

[0066] 2. This invention, through a unique design, uses a PC ultrasonic spot welding machine to weld the electric ignition head wires and the nickel leads on the terminals, such as... Figure 7 As shown, this connection method is more reliable than the traditional lead-wound nickel lead connection, which involves mechanical winding and then pressing, while this method uses ultrasonic welding to fuse the leads together, resulting in low contact resistance.

[0067] 3. This invention replaces the irregularly shaped asbestos pad by designing a pressure plate to rigidly fix the electric ignition head. This eliminates the need for polytetrafluoroethylene tubing and 704 glue during the battery cover manufacturing process, thereby reducing the amount of organic matter used inside the thermal battery.

[0068] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for rigidly fixing an electric ignition head, characterized in that, The method includes the following steps: S1. Design and fabricate the pressure plate for fixing the electric ignition head. S11. The pressure plate is made of rigid insulating material and machined into a circular shape; S12. A first through hole of a first diameter is machined in the center of the pressure plate to hold the propellant head of the electric ignition head; S13. A "T" shaped groove is milled on one side of the pressure plate, and an "I" shaped groove is milled on the other side. The "I" shaped groove is connected to the first through hole slot. The small end of the "T" shaped groove and the two ends of the "I" shaped groove are at the same position on the pressure plate. S14. Two second through holes of the second diameter are machined at both ends of the "I"-shaped groove for the electric ignition head wire to pass through the pressure plate; S15. Two third-diameter through holes are machined at the large end of the "T"-shaped groove for the electric ignition head wire to be led out. S2. Assemble the electric ignition head assembly into a combined battery cover. S21. First, weld nickel leads to the terminal blocks of the cover; S22. Take 3 asbestos pads, use a flat chisel to drill holes in the asbestos pads according to the position of the terminal on the cover, and put the asbestos pads on the terminal on the cover. At this time, bend the positive and negative nickel leads down and lead them outward in the radial direction. S23. Take the ignition head and put a polytetrafluoroethylene tube on the ignition head wire. Then, firmly insert and wrap the ignition head wire around the pressure plate according to the ignition head wire installation method. Insert the assembled ignition head assembly into the terminal block. S24. Ultrasonically weld the electric ignition head wires from the electric ignition head assembly to the two leads of the corresponding terminals, and then press them down after welding. S25. Several asbestos pads with central holes are threaded onto the cover to make a combined battery cover. in, First diameter > Third diameter > Second diameter; The wiring installation method of the electric ignition head is as follows: The wire of the electric ignition head extends from the first through hole to the "I" shaped groove, extends to the second through hole on both sides of the "I" shaped groove, passes through the pressure plate from the second through hole, extends along the "T" shaped groove to the third through hole, and is led out after passing through the third through hole to form the electric ignition head assembly.

2. The method for rigidly fixing the electric ignition head as described in claim 1, characterized in that, The thickness of the pressure plate is 2mm-4mm.

3. The method for rigidly fixing the electric ignition head as described in claim 2, characterized in that, The depth of the "T" shaped groove and the "I" shaped groove is 0.5mm-1mm.

4. The method for rigidly fixing the electric ignition head as described in claim 3, characterized in that, The pressure plate is made of 3240 epoxy phenolic laminate material according to GB / T1303.1-1998.

5. The method for rigidly fixing the electric ignition head as described in claim 1, characterized in that, Step S25 includes: inserting 2-3 asbestos pads with central holes onto the cover body to form a combined battery cover.

6. The method for rigidly fixing the electric ignition head as described in claim 1, characterized in that, In S23, first insert one asbestos pad with a center hole, then insert the electric ignition head assembly, and then in S25 insert two asbestos pads with center holes.

7. The method for rigidly fixing the electric ignition head as described in claim 1, characterized in that, Step S24 specifically includes: inserting the electric ignition head wire from the electric ignition head assembly into the middle of the two leads of the corresponding terminal, and performing ultrasonic welding, and then pressing it down after welding.

8. The method for rigidly fixing the electric ignition head as described in claim 7, characterized in that, Use PC series ultrasonic spot welding machines to weld wires and leads.