Elbow-shaped thermal battery and assembly method thereof

Abstract

The invention discloses a bent-pipe-shaped thermal battery and an assembly method thereof, and belongs to the technical field of thermal batteries, the bent-pipe-shaped thermal battery comprises a battery cover, a battery shell bottom, a bent pipe shell and a special-shaped battery stack in the bent pipe shell, and is characterized in that the battery shell bottom and the bent pipe shell are welded into a whole, and a flexible insulation thermal insulation layer is assembled between the special-shaped battery stack and the bent pipe shell; an electric connection assembly, an igniter, a heat insulation pad and an ignition assembly are arranged outside the electric pile, the electric pile is formed by connecting single batteries in series and in parallel, and each single battery is formed by laying powder on a negative electrode, an electrolyte, a positive electrode and a heating medicine layer by layer in a one-time pressing mode. By the adoption of the technical scheme, the bent-pipe-shaped thermal battery can be matched with the inner cavity space of a weapon system, the proportion of active substances is increased on the premise that the space is limited, and the space utilization rate is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal batteries, and in particular relates to a bent-tube thermal battery and an assembly method thereof. Background Art

[0002] Nowadays, the development of weapons and ammunition tends to be miniaturized and compact, and the utilization rate of internal space structures is increasingly required, which puts higher requirements on the integration and conformity of internal thermal batteries. At present, thermal batteries are generally cylindrical, requiring a relatively regular space, and it is difficult to meet the placement requirements of irregular spaces. Special-shaped thermal batteries are very rare, and there are no reports of curved tube thermal batteries. For the annular space in the magazine of weapons and ammunition, the existing thermal batteries can only reduce the diameter and height to adapt to the space. As a result, the amount of active substances in the thermal battery is reduced, making it difficult to meet the power demand. Summary of the invention

[0003] In order to solve the technical problem of maximizing the space utilization of thermal batteries in an annular installation space, the present invention provides a bent tubular thermal battery and an assembly method thereof. The thermal battery can fill the annular space in weapons and ammunition, and the battery material accounts for the highest proportion in a limited space, thereby better meeting the electricity demand of weapons and ammunition.

[0004] The present invention adopts the following technical scheme: a bent tube thermal battery, comprising a battery cover, a battery shell bottom, a bent tube shell and a special-shaped battery stack located in the bent tube shell, the battery shell bottom and the bent tube shell are welded as a whole, a heat insulating pad is placed on the inner side of the shell bottom, a flexible heat insulating layer is assembled on the outside of the special-shaped battery stack, the special-shaped battery stack is connected to an electrical connection component and connected to the terminal post of the battery cover, an igniter is connected under the battery cover, the igniter is in contact with the ignition component to facilitate fire transmission, and an igniter heat insulating pad is installed outside the igniter under the battery cover to achieve the effect of protecting the igniter and keeping the thermal battery warm.

[0005] Furthermore, fixing plates are placed on the upper and lower end surfaces of the special-shaped battery stack, and locking belts are installed between the two fixing plates. The fixing plates and locking belts are made of one of stainless steel, aluminum and aluminum alloys, titanium and titanium alloys, and ceramic composite materials.

[0006] Furthermore, the battery elbow shell is finally welded to the battery cover by a welding method selected from the group consisting of argon arc welding, laser welding, and electron beam welding.

[0007] Furthermore, the material of the battery cover main body, the bent tube shell and the battery shell bottom is one of stainless steel, titanium and titanium alloy, aluminum and aluminum alloy.

[0008] Furthermore, a flexible insulating layer is assembled between the special-shaped battery stack and the curved tube housing. The flexible insulating layer, the igniter insulating pad and the insulating pad can be made of aerogel, ceramic fiber, asbestos fiber, foamed glue, or silicone rubber.

[0009] Furthermore, the special-shaped battery stack is composed of single cells connected in series and parallel, and the single cells are formed by pressing a negative electrode, an electrolyte, a positive electrode, and a heating agent layer by layer with powder.

[0010] Furthermore, the assembly method of the bent tubular thermal battery is characterized by comprising the following steps:

[0011] 1) Assemble the elbow shell and the battery shell bottom on the welding tool and weld them together;

[0012] 2) The negative electrode sheet, electrolyte powder, positive electrode powder and heating agent are laid layer by layer in a monomer pressing mold, and a single battery is obtained by pressing and molding at one time;

[0013] 3) Stack the single cells in a certain series-parallel relationship in a battery stack assembly mold with a curved tube-shaped inner cavity to form a special-shaped battery stack, place electrical connection components at the corresponding positions, place a fixing plate on each of the upper and lower end surfaces, apply pressure to tighten, and install an ignition component and a locking belt between the two fixing plates.

[0014] 4) An igniter is connected to the designated terminal of the battery cover, an igniter heat insulation pad is installed around the igniter under the battery cover, an electrical connection component is welded to the designated terminal of the battery cover, and connected to the corresponding electrical connection component of the special-shaped battery stack, and the igniter contacts the ignition component in the special-shaped battery stack;

[0015] 5) An insulating heat-insulating pad is placed at the bottom of the battery shell, and a flexible insulating heat-insulating layer is wrapped around the outside of the special-shaped battery stack, which is pressed into the aforementioned battery shell with a certain pressure, assembled on a welding tool to complete welding, and a sealed curved tubular thermal battery is obtained.

[0016] The advantages and positive effects of the present invention are: it can achieve integration and conformity when the inner cavity of weapons and ammunition is difficult to meet the space requirements of conventional thermal batteries, maximize the use of space, and improve the electrical performance output capacity to meet the electricity needs of weapons and ammunition. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the bent-tube thermal battery of the present invention;

[0018] In the figure: 1. battery cover; 2. bent tube shell; 3. battery shell bottom; 4. special-shaped battery stack; 5. insulating heat insulation pad; 6. fixing plate; 7. igniter heat insulation pad; 8. flexible insulating heat insulation layer; 9. ignition assembly; 10. electrical connection assembly; 11. locking belt; 12. igniter. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as “upper”, “middle”, “lower”, “inside”, “outside”, and “both sides” are based on the orientations or positional relationships shown in the accompanying drawings, and are only simplified descriptions for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] like Figure 1 As shown, the bent tube thermal battery of the present invention includes a battery cover 1, a battery shell bottom 3, a bent tube shell 2 and a special-shaped battery stack 4 located in the bent tube shell 2, the battery shell bottom 3 and the bent tube shell 2 are welded as a whole, a heat insulation pad 5 is placed on the inner side of the shell bottom, a flexible insulation layer 8 is assembled on the outside of the special-shaped battery stack 4, the special-shaped battery stack 4 is connected to an electrical connection component 10, and is connected to the terminal of the battery cover 1, an igniter 12 is connected under the battery cover 1, the igniter 12 is in contact with the ignition component 9 to facilitate fire transmission, an igniter insulation pad 7 is installed outside the igniter 12 under the battery cover 1, so as to protect the igniter 12 and keep the thermal battery warm.

[0023] Fixing plates 6 are placed on the upper and lower end surfaces of the special-shaped battery stack 4 , and a locking belt 11 is installed between the two fixing plates 6 .

[0024] The fixing plate 6 and the locking belt 11 are made of one of stainless steel, aluminum and aluminum alloy, titanium and titanium alloy, and ceramic composite materials.

[0025] The bent tube shell 2 is welded to the battery cover 1 by a welding method selected from the group consisting of argon arc welding, laser welding, and electron beam welding.

[0026] The material of the main body of the battery cover 1, the elbow shell 2 and the battery shell bottom 3 is one of stainless steel, titanium and titanium alloy, aluminum and aluminum alloy.

[0027] The flexible insulating layer 8, the igniter insulating pad 7 and the insulating pad 5 are made of aerogel, ceramic fiber, asbestos fiber, foamed glue and silicone rubber.

[0028] The special-shaped battery stack 4 is composed of single cells connected in series and parallel, and the single cells are formed by pressing a negative electrode, an electrolyte, a positive electrode, and a heating agent layer by layer.

[0029] The assembly method of the bent-tube thermal battery comprises the following steps:

[0030] 1) Assemble the elbow shell 2 and the battery shell bottom 3 on a welding tool and weld them together;

[0031] 2) The negative electrode sheet, electrolyte powder, positive electrode powder and heating agent are laid layer by layer in a monomer pressing mold, and a single battery is obtained by pressing and molding at one time;

[0032] 3) The single cells are stacked in a battery stack assembly mold with a curved tube-shaped inner cavity according to a certain series-parallel relationship to form a special-shaped battery stack 4, an electrical connection component 10 is placed at the corresponding position, a fixing plate 6 is placed on each of the upper and lower end surfaces, pressure is applied to tighten, and an ignition component 9 and a locking belt 11 are installed between the two fixing plates 6;

[0033] 4) An igniter 12 is connected to the designated terminal of the battery cover 1, an igniter heat insulation pad 7 is installed around the igniter 12 below the battery cover 1, an electrical connection component 10 is welded to the designated terminal of the battery cover 1, and is connected to the corresponding electrical connection component 10 of the special-shaped battery stack 4, and the igniter 10 contacts the ignition component 9 in the special-shaped battery stack 4;

[0034] 5) An insulating heat-insulating pad 5 is placed at the bottom of the battery cavity made in step 1, and a flexible insulating heat-insulating layer 8 is wrapped around the special-shaped battery stack 4, which is pressed into the aforementioned battery cavity with a certain pressure, assembled on a welding tool to complete welding, and a sealed curved tubular thermal battery is obtained.

[0035] The working principle of the bent tubular thermal battery of the present invention is that when the activation circuit of the bent tubular thermal battery receives the activation current input, the igniter ignites, the flame ignites the ignition component, and the ignition component ignites the heating agent of the single battery in the special-shaped battery stack, so that the special-shaped battery stack is instantly heated to more than 100 degrees, the solid electrolyte in the battery is melted, and the electrolyte becomes an ion conductor to supply power to the outside.

[0036] Example 1

[0037] like Figure 1 As shown, the bent-tube thermal battery and its assembly method provided by the present invention mainly include a battery cover, a battery shell bottom, a bent-tube shell and a special-shaped battery stack therein.

[0038] The battery cover has at least four terminals, which are two activation terminals, one output positive terminal, and one output negative terminal. The main body of the battery cover, the bottom of the battery shell, and the bent tube shell are made of stainless steel and are connected together by argon arc welding to achieve the purpose of thermal battery sealing. The leakage rate is no more than 3×10 -7 Pa.m 3 / s.

[0039] The inside of the shell is respectively provided with a heat-insulating pad, a special-shaped battery stack, a fixing plate, a locking belt, an insulating layer, an electrical connection assembly, an ignition assembly, an igniter heat-insulating pad, and an igniter from bottom to top.

[0040] The special-shaped battery stack is composed of 15 single cells connected in parallel, and the single cells are formed by pressing a negative electrode, an electrolyte, a positive electrode, and a heating agent layer by layer.

[0041] Fixing plates are placed on the upper and lower end surfaces of the special-shaped battery stack, and locking belts are installed between the two fixing plates. The fixing plates and the locking belts are both made of stainless steel.

[0042] A flexible insulating layer is assembled between the special-shaped battery stack and the curved tube housing. The flexible insulating layer, the igniter insulating pad and the insulating pad are made of asbestos fiber.

[0043] The assembly method of the bent tubular thermal battery is characterized by comprising the following steps:

[0044] 1) Assemble the elbow shell and the battery shell bottom on the welding tool and weld them together by argon arc welding;

[0045] 2) The negative electrode sheet, electrolyte powder, positive electrode powder and heating agent are laid layer by layer in a monomer pressing mold, and a single battery is obtained by pressing and molding at one time;

[0046] 3) Stack the single cells in series-parallel relationship in a battery stack assembly mold with a curved tubular inner cavity to form a special-shaped battery stack, place electrical connection components at the corresponding positions, place a fixing plate on each of the upper and lower end surfaces, apply a pressure of 100kg to tighten, and install an ignition component and a locking belt between the two fixing plates.

[0047] 4) The two ignition head terminals of the battery cover are connected to the igniter, and an asbestos fiber igniter heat insulation pad is installed around the igniter under the battery cover. The positive and negative terminals of the battery cover are welded with electrical connection components and connected with the corresponding electrical connection components of the special-shaped battery stack. The igniter contacts the ignition component in the special-shaped battery stack;

[0048] 5) An asbestos insulating pad is placed at the bottom of the battery shell, and a flexible insulating layer is wrapped around the special-shaped battery stack. The special-shaped battery stack and related components are pressed into the aforementioned battery cavity at a pressure of 200 kg, and assembled on a welding tool to complete welding to obtain a sealed curved tubular thermal battery.

[0049] Example 2

[0050] The difference from Example 1 is that the main part of the battery cover, the bottom of the battery shell and the bent tube shell are made of TC4 titanium alloy, and the welding method is laser welding; there are 5 battery cover terminals, namely "D", "D", "E", "+28", and "+56" terminals, and the connection method of the special-shaped battery stack is 30 pieces in series, and an additional electrical connection component is connected from the 15th piece to connect to the "+28" terminal; the fixing plate is made of TC4 titanium alloy.

[0051] The embodiments of the present invention are described in detail above, but the contents are only embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A bent-tube thermal battery, characterized in that: The invention comprises a battery cover (1), a battery shell bottom (3), a curved tube shell (2) and a special-shaped battery stack (4) located in the curved tube shell (2); the battery shell bottom (3) and the curved tube shell (2) are welded into a whole; a heat insulating pad (5) is placed inside the shell bottom; a flexible heat insulating layer (8) is assembled outside the special-shaped battery stack (4); the special-shaped battery stack (4) is connected to an electrical connection component (10) and is connected to a terminal of the battery cover (1); an igniter (12) is connected under the battery cover (1); the igniter (12) contacts with an ignition component (9) to facilitate fire transmission; an igniter heat insulating pad (7) is installed outside the igniter (12) under the battery cover (1) to achieve the effect of protecting the igniter (12) and keeping the heat of the thermal battery.

2. The bent-tube thermal battery according to claim 1, characterized in that: Fixing plates (6) are placed on the upper and lower end surfaces of the special-shaped battery stack (4), and a locking belt (11) is installed between the two fixing plates (6).

3. The bent-tube thermal battery according to claim 2, characterized in that: The material of the fixing plate (6) and the locking belt (11) is one of stainless steel, aluminum and aluminum alloy, titanium and titanium alloy, and ceramic composite material.

4. The bent-tube thermal battery according to claim 1, characterized in that: The bent tube shell (2) is welded to the battery cover (1) by a welding method selected from the group consisting of argon arc welding, laser welding, and electron beam welding.

5. The bent-tube thermal battery according to claim 1, characterized in that: The material of the main body of the battery cover (1), the bent tube shell (2) and the battery shell bottom (3) is one of stainless steel, titanium and titanium alloy, aluminum and aluminum alloy.

6. The bent-tube thermal battery according to claim 1, characterized in that: The flexible insulating heat-insulating layer (8), the igniter heat-insulating pad (7) and the heat-insulating pad (5) are made of aerogel, ceramic fiber, asbestos fiber, foamed glue and silicone rubber materials.

7. The bent-tube thermal battery according to claim 1, characterized in that: The special-shaped battery stack (4) is composed of single cells connected in series and in parallel, and the single cells are formed by pressing a negative electrode, an electrolyte, a positive electrode and a heating agent layer by layer.

8. A method for assembling a bent-tube thermal battery as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: 1) Assembling the bent tube housing (2) and the battery housing bottom (3) on a welding tool and welding them together; 2) The negative electrode sheet, electrolyte powder, positive electrode powder and heating agent are laid layer by layer in a monomer pressing mold, and a single battery is obtained by pressing and molding at one time; 3) stacking the single cells in a certain series-parallel relationship in a battery stack assembly mold with a curved tube-shaped inner cavity to form a special-shaped battery stack (4), placing an electrical connection component (10) at a corresponding position, placing a fixing plate (6) on each of the upper and lower end surfaces, applying pressure to tighten, and installing an ignition component (9) and a locking belt (11) between the two fixing plates (6); 4) An igniter (12) is connected to a designated terminal of the battery cover (1), an igniter heat insulation pad (7) is installed around the igniter (12) below the battery cover (1), an electrical connection component (10) is welded to the designated terminal of the battery cover (1), and connected to a corresponding electrical connection component (10) of the special-shaped battery stack (4), and the igniter (10) contacts an ignition component (9) in the special-shaped battery stack (4); 5) An insulating heat-insulating pad (5) is placed at the bottom of the battery cavity produced in step 1), and a flexible insulating heat-insulating layer (8) is wrapped around the outside of the special-shaped battery stack (4), which is pressed into the aforementioned battery cavity with a certain pressure, assembled on a welding tool, and welded to obtain a sealed curved tubular thermal battery.

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