A manufacturing method of a heat-insulated battery case

Abstract

The present invention relates to a manufacturing method of a heat-insulated battery case, belonging to the technical field of thermal batteries. The present invention manufactures an assembly rod; the assembly rod includes a core rod (2) and a pressing ring (1); a heat-insulating material (3) is wound around the assembly rod; the heat-insulating material (3) is wound around the winding end of the core rod (2); the assembly rod wound with the heat-insulating material (3) is inserted into the battery case, and the assembly rod is withdrawn after the heat-insulating material is assembled in place. The advantages and positive effects of the present invention are: the assembly rod for thermal batteries has a simple and ingenious design, low cost, and high reuse rate; the number and tightness of the assembled heat-insulating materials are controllable, and the assembly consistency is good; the heat-insulating materials can be pre-loaded into the case in advance, improving the production efficiency of thermal batteries and being suitable for mass production.

Description

Technical Field

[0001] The present invention belongs to the technical field of thermal batteries, and particularly relates to a manufacturing method for a heat-insulated battery case. Background Art

[0002] A thermal battery is a primary reserve battery. When in use, it ignites a heating system by means of electrical activation or mechanical activation, etc., heats the non-conductive solid electrolyte into a molten ionic conductor to make it enter the working state. Thermal batteries have the advantages of high specific energy and specific power, short activation time, long storage period, wide working temperature range, strong environmental adaptability, etc. At present, thermal batteries are widely used in weapon systems such as fuzes, shells, rockets, aerial bombs, missiles, etc.

[0003] Looking at the development technology of thermal batteries, there are few reports on the manufacturing method for a heat-insulated battery case of a thermal battery. The currently known thermal battery heat-insulation layer is directly wound around the stack. It has high requirements for operators. Different operators have different winding tightness degrees, the consistency of the quantity of the wound heat-insulation material is not good, and it is not easy to install the stack with the wound heat-insulation layer into the case body, and it is not possible to well judge whether the heat-insulation layer is stuffed into the bottom of the case body. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] The technical problem to be solved by the present invention is how to provide a manufacturing method for a heat-insulated battery case to solve the problems that the manufacturing of a heat-insulated battery case of a thermal battery has high requirements for operators, different operators have different winding tightness degrees, the consistency of the quantity of the wound heat-insulation material is not good, and it is not easy to install the stack with the wound heat-insulation layer into the case body, and it is not possible to well judge whether the heat-insulation layer is stuffed into the bottom of the case body.

[0006] (2) Technical Solutions

[0007] To solve the above technical problems, the present invention proposes a manufacturing method for a heat-insulated battery case, and the method includes:

[0008] S1. Manufacture an assembly rod; the assembly rod includes a core rod (2) and a pressing ring (1);

[0009] The core rod (2) is integrally formed by thin cylinders at both ends and a thick cylinder in the middle. One end is a winding end for winding the heat-insulation material (3), and its outer diameter size and the inner diameter size of the pressing ring (1) are matching sizes. The pressing ring (1) is directly sleeved on the winding end of the core rod (2) and can easily slide on the core rod (2); the other end of the core rod (2) is a hand-held end for facilitating the extraction of the core rod (2) from the case body by hand after the heat-insulation material (3) is loaded into the case body; the thick cylinder is used to connect the thin cylinders at both ends and block the pressing ring (1).

[0010] The pressure ring (1) is integrally formed by two rings of different sizes. The inner diameters of the two rings are the same and they are concentrically connected. The inner diameter of the pressure ring (1) is the same as the outer diameter of the winding end of the core rod (2). The outer diameter of the small ring of the pressure ring (1) is the same as the inner diameter of the battery case and also the same as the outer diameter of the thermal insulation material (3) wound on the core rod (2).

[0011] Put the pressure ring (1) on the winding end of the core rod (2), and the large ring is in close contact with the thick cylinder.

[0012] S2. Wind the thermal insulation material on the assembly rod.

[0013] Wind the thermal insulation material (3) on the winding end of the core rod (2).

[0014] S3. Insert the assembly rod wound with the thermal insulation material into the battery case. After the thermal insulation material is assembled in place, pull out the assembly rod.

[0015] Furthermore, both the core rod (2) and the pressure ring (1) are processed from bakelite rod materials.

[0016] Furthermore, the outer diameter of the winding end of the core rod (2) = the inner diameter of the case - 2 * the thickness of the thermal insulation material (3).

[0017] Furthermore, the outer diameter of the small ring is smaller than the outer diameter of the thick cylinder, and the outer diameter of the thick cylinder is smaller than the outer diameter of the large ring.

[0018] Furthermore, the thermal insulation material is composed of a layer of mica material, a layer of asbestos material, and a layer of air filter fiberglass material.

[0019] Furthermore, after the thermal insulation material is installed in the case, the distance from its upper end to the mouth of the case is 10 mm, and the width of the thermal insulation material is designed to be the depth of the case - 10 mm.

[0020] Furthermore, when winding, first wind the mica material on the core rod of the assembly rod, then wind the asbestos material on the mica material, and finally wind the air filter fiberglass material on the asbestos material.

[0021] Furthermore, the specific steps of S3 include: the upper hand inserts the assembly rod wound with the thermal insulation material (3) into the battery case. During the operation, hold the thermal insulation material and slowly push it into the battery case. When it is pushed to a position close to the mouth of the case, change to finger-pressing the pressure ring (1) to continue pushing the thermal insulation material deeper into the case until the thermal insulation material (3) is pushed to the bottom of the case. Finally, hold down the pressure ring (1), pull out the core rod (2) from the case, and then remove the pressure ring (1), and the thermal insulation material (3) can be easily installed in the case.

[0022] Furthermore, when installing the thermal insulation material in a battery case with an inner diameter of φ39 mm and a depth of 43 mm, when the thickness of the thermal insulation layer is designed to be 3 mm, the design of the part of the core rod where the thermal insulation material is wound The outer diameter of the heat-insulating material wound around the core rod will be φ39mm, which is basically the same as the inner diameter of the shell. The inner diameter of the pressure ring is designed as The outer diameter of the small cylinder of the pressure ring is the same as the inner diameter of the shell, which is φ39mm. The 3mm-thick small ring is used to push the heat-insulating material to the bottom of the shell.

[0023] Furthermore, after the heat-insulating material is loaded into the shell, the distance from its upper end to the mouth of the shell is designed to be 10mm, and the width of the heat-insulating material is designed to be 33mm.

[0024] (III) Beneficial effects

[0025] The present invention provides a manufacturing method for a heat-insulated battery case. The advantages and positive effects of the present invention are as follows:

[0026] 1) The assembly rod for the thermal battery is simply and ingeniously designed, with low cost and high reuse rate.

[0027] 2) The quantity and tightness of the assembled heat-insulating material can be controlled, and the assembly consistency is good.

[0028] 3) The heat-insulating material can be pre-loaded into the shell in advance, improving the production efficiency of the thermal battery and being suitable for mass production. Description of the drawings

[0029] Figure 1 It is a schematic structural diagram of the assembly rod of the present invention;

[0030] Figure 2 It is a schematic structural diagram of the assembly rod for winding the heat-insulating material of the present invention;

[0031] Figure 3 It is a schematic structural diagram of the assembly rod with the heat-insulating material loaded into the shell of the present invention.

[0032] In the figure, 1 - pressure ring, 2 - core rod, 3 - heat-insulating material. Detailed implementation manners

[0033] To make the purpose, content and advantages of the present invention clearer, the following further describes the detailed implementation manners of the present invention in combination with the drawings and embodiments.

[0034] The present invention provides a manufacturing method for a heat-insulated battery case to solve the technical problems existing in the prior art. This assembly method can effectively control the quantity and thickness of the wound heat-insulating material, with good quality consistency, and this method is carried out before battery assembly, which can effectively improve the production efficiency.

[0035] The technical problem to be solved by the present invention is to provide a manufacturing method for a heat-insulated battery case in view of the prior art background, including the following steps:

[0036] S1. Use bakelite to make an assembly rod;

[0037] As Figure 1 , 2 shown, the assembly rod includes a core rod (2) and a pressing ring (1);

[0038] The core rod (2) is integrally formed by thin cylinders at both ends and a thick cylinder in the middle. One end is a winding end for winding the thermal insulation material (3). Its outer diameter dimension and the inner diameter dimension of the pressing ring (1) are matching dimensions. The pressing ring (1) is directly sleeved on the winding end of the core rod (2) and can slide easily on the core rod (2). The other end of the core rod (2) is a hand-held end for easy extraction of the core rod (2) by hand after the thermal insulation material (3) is loaded into the housing. The thick cylinder is used to connect the thin cylinders at both ends and block the pressing ring (1).

[0039] The pressing ring (1) is integrally formed by two rings of different sizes. The inner diameters of the two rings are the same and are concentrically connected. The inner diameter of the pressing ring (1) is the same as the outer diameter of the winding end of the core rod (2). The outer diameter of the small ring of the pressing ring (1) is the same as the inner diameter of the battery housing and also the same as the outer diameter of the thermal insulation material (3) wound on the core rod (2). The outer diameter of the large ring of the pressing ring (1) is not limited, mainly to facilitate the process operator to press and push the wound thermal insulation material with fingers.

[0040] Both the core rod (2) and the pressing ring (1) are processed from bakelite rod materials. The pressing ring (1) is sleeved on the winding end of the core rod (2), and the large ring is close to the thick cylinder.

[0041] Further, the outer diameter of the winding end of the core rod (2) = inner diameter of the housing - 2 * thickness of the thermal insulation material (3).

[0042] Further, generally, the outer diameter of the small ring is smaller than the outer diameter of the thick cylinder, and the outer diameter of the thick cylinder is smaller than the outer diameter of the large ring for easy operation.

[0043] S2. Wind the thermal insulation material on the assembly rod;

[0044] Wind the thermal insulation material (3) on the winding end of the core rod (2).

[0045] The thermal insulation material is composed of a layer of mica material, a layer of asbestos material, and a layer of air filter fiberglass material.

[0046] Further, after the thermal insulation material is loaded into the housing, the upper end thereof is generally designed to be 10 mm away from the mouth of the housing. Therefore, the width of the thermal insulation material is designed to be the depth of the housing - 10 mm.

[0047] Further, when winding, first wind the mica material on the core rod of the assembly rod, then wind the asbestos material on the mica material, and finally wind the air filter fiberglass material on the asbestos material.

[0048] S3. Insert the assembly rod wound with the thermal insulation material into the battery housing, and extract the assembly rod after the thermal insulation material is assembled in place.

[0049] Insert the assembly rod wrapped with the thermal insulation material (3) into the battery housing. During the operation, hold the thermal insulation material and slowly push it into the battery housing. When it is pushed to a position close to the mouth of the housing, use your finger to push the pressure ring (1) to continue pushing the thermal insulation material deeper into the housing until the thermal insulation material (3) is pushed to the bottom of the housing. Finally, hold down the pressure ring (1), pull out the core rod (2) from the housing, and then remove the pressure ring (1), and the thermal insulation material (3) can be easily installed into the housing.

[0050] Example 1:

[0051] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. However, these embodiments are only for illustration purposes and do not limit the scope of the present invention.

[0052] A method for manufacturing a heat-insulated battery housing of the present invention has the following process: 1) Use bakelite to make an assembly rod. 2) Wrap a thermal insulation material around the assembly rod. 3) Insert the assembly rod wrapped with the thermal insulation material into the battery housing, and after the thermal insulation material is assembled in place, pull out the assembly rod.

[0053] Example: Install a thermal insulation material in a battery housing with an inner diameter of φ39mm and a depth of 43mm.

[0054] The assembly rod consists of two parts, a pressure ring 1 and a core rod 2, both made of bakelite material. The pressure ring can slide freely on the outer wall of the core rod. For a housing with an inner diameter of φ39mm, when the thickness of the thermal insulation layer is designed to be 3mm, the part of the core rod where the thermal insulation material is wound is designed The outer diameter of the thermal insulation material wound around the core rod will be φ39mm, which is basically the same as the inner diameter of the housing. The inner diameter of the pressure ring is designed to be The outer diameter of the small cylinder of the pressure ring is the same as the inner diameter of the housing, which is φ39mm. The 3mm thick small ring is used to push the thermal insulation material to the bottom of the housing.

[0055] The thermal insulation material 3 is composed of a layer of mica material, a layer of asbestos material, and a layer of air filter glass fiber material. Since the upper end of the thermal insulation material is generally designed to be 10mm away from the mouth of the housing after it is installed in the housing, the width of the thermal insulation material is designed to be 33mm. The length of the thermal insulation material can be adjusted according to the process requirements. Generally, it is required that the length of each layer of thermal insulation material can be wound at least one circle. First, wind the mica material around the core rod of the assembly rod, then wind the asbestos material onto the mica material, and finally wind the air filter glass fiber material onto the asbestos material. The structure is as Figure 2 shown. Hold the part of the thermal insulation material by hand and push it into the battery housing together with the assembly rod. Use the pressure ring to press the thermal insulation material to the bottom of the housing, hold down the pressure ring and pull out the core rod, and remove the pressure ring to complete the assembly of the thermal insulation material. As Figure 3 shown, a heat-insulated battery housing is obtained.

[0056] The advantages and positive effects of the present invention are as follows:

[0057] 1) The assembly rod for the thermal battery is simply and ingeniously designed, with low cost and high reuse rate.

[0058] 2) The number and tightness of the thermal insulation material assemblies are controllable, and the assembly consistency is good.

[0059] 3) The thermal insulation material can be pre-loaded into the housing, improving the production efficiency of the thermal battery and being suitable for mass production.

[0060] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A manufacturing method of a heat-insulating battery case, characterized in that, the method comprises: S1. Manufacturing an assembly rod; the assembly rod includes a core rod (2) and a pressing ring (1); The core rod (2) is integrally formed by thin cylinders at both ends and a thick cylinder in the middle. One end is a winding end for winding heat-insulating material (3), and its outer diameter dimension and the inner diameter dimension of the pressing ring (1) are matching dimensions. The pressing ring (1) is directly sleeved on the winding end of the core rod (2) and can slide easily on the core rod (2). The other end of the core rod (2) is a hand-held end for easily pulling out the core rod (2) by hand after the heat-insulating material (3) is loaded into the case. The thick cylinder is used to connect the thin cylinders at both ends and block the pressing ring (1); The pressing ring (1) is integrally formed by two rings of different sizes. The inner diameters of the two rings are the same and are concentrically connected. The inner diameter of the pressing ring (1) is the same as the outer diameter of the winding end of the core rod (2). The outer diameter of the small ring of the pressing ring (1) is the same as the inner diameter of the battery case and is also the same as the outer diameter of the heat-insulating material (3) wound on the core rod (2); The pressing ring (1) is sleeved on the winding end of the core rod (2), and the large ring is close to the thick cylinder; S2. Winding the heat-insulating material (3) on the assembly rod; The heat-insulating material (3) is wound on the winding end of the core rod (2); S3. Inserting the assembly rod wound with the heat-insulating material (3) into the battery case, and pulling out the assembly rod after the heat-insulating material is assembled in place.

2. The manufacturing method of the heat-insulating battery case according to claim 1, characterized in that, both the core rod (2) and the pressing ring (1) are processed from bakelite rod materials.

3. The manufacturing method of the heat-insulating battery case according to claim 1, characterized in that, the outer diameter of the winding end of the core rod (2) = the inner diameter of the case - 2 * the thickness of the heat-insulating material (3).

4. The manufacturing method of the heat-insulating battery case according to claim 1, characterized in that, the outer diameter of the small ring is smaller than the outer diameter of the thick cylinder, and the outer diameter of the thick cylinder is smaller than the outer diameter of the large ring.

5. The manufacturing method of the heat-insulating battery case according to claim 1, characterized in that, the heat-insulating material is composed of a layer of mica material, a layer of asbestos material and a layer of air filter glass fiber material.

6. The manufacturing method of the heat-insulating battery case according to claim 5, characterized in that, after the heat-insulating material is loaded into the case, the upper end thereof is 10 mm away from the mouth of the case, and the width of the heat-insulating material is designed to be the depth of the case - 10 mm.

7. The manufacturing method of the heat-insulating battery case according to claim 5, characterized in that, when winding, first wind the mica material on the core rod of the assembly rod, then wind the asbestos material on the mica material, and finally wind the air filter glass fiber material on the asbestos material.

8. The manufacturing method of the heat-insulating battery case according to any one of claims 1-7, characterized in that, The specific steps of step S3 are as follows: First, insert the assembly rod wrapped with the thermal insulation material (3) into the battery housing. During the operation, hold the thermal insulation material and slowly push it into the battery housing. When it is pushed to a position close to the mouth of the housing, use your fingers to push the pressing ring (1) to continue pushing the thermal insulation material deeper into the housing until the thermal insulation material (3) is pushed to the bottom of the housing. Finally, hold down the pressing ring (1), pull out the core rod (2) from the housing, and then remove the pressing ring (1), and the thermal insulation material (3) can be easily installed into the housing.

9. The manufacturing method of the thermally insulated battery housing according to any one of claims 1-7, characterized in that, When installing thermal insulation material in a battery case with an inner diameter of φ39 mm and a depth of 43 mm, when the thickness of the thermal insulation layer is designed to be 3 mm, the part of the core rod wound with thermal insulation material is designed to be φ33 - 0. 0 2 mm, the outer diameter of the thermal insulation material wound on the core rod will be φ39 mm, which is basically the same as the inner diameter of the case, and the inner diameter of the pressure ring is designed to be φ33 + 0 0.2 mm, the outer diameter of the small cylinder of the pressure ring is the same as the inner diameter of the case, which is φ39 mm, and the 3 - mm - thick small ring is used to push the thermal insulation material to the bottom of the case.

10. The manufacturing method of the thermally insulated battery housing according to claim 9, characterized in that, after the thermal insulation material is installed in the housing, the distance from its upper end to the mouth of the housing is designed to be 10 mm, and the width of the thermal insulation material is designed to be 33 mm.

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