Puncture-resistant insert structure and manufacturing method thereof

Abstract

The invention provides a puncture-resistant insert structure and a manufacturing method thereof, and relates to the technical field of battery insert structures. According to the puncture-resistant insertion piece structure, a brand new insertion piece structure is provided, firstly, the insertion piece structure body is of a sandwich structure and is composed of the middle layer for releasing water and the trigger layers located on the upper surface and the lower surface, a multi-layer protection mechanism can be provided for the battery cell on the inner side of the insertion piece structure body, secondly, the middle layer can absorb impact force generated during puncture, and meanwhile the insertion piece structure can be prevented from being damaged. According to the adopted operation mechanism, after the middle layer is broken, only one water drop can leave the material, so that the whole material becomes a beach of water, the water drops are difficult to spread on metal and various surfaces, and a power generation passage is realized; and the water drops only evaporate and do not form a conducting medium, so that the safety and the stability are high, and short circuit and fire caused by puncture can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of battery insert structures, and in particular to a puncture-resistant insert structure and a manufacturing method thereof. Background Art

[0002] The plug is a small part widely used in electronic devices. For example, the structure of the battery plug is the core part of the battery connector, responsible for the electrical connection function. In electric vehicles, the battery plug is used to connect the cells in the battery pack to ensure the stable transmission of current. In addition, some new materials such as aerogel insulation pads are also used to protect the cells in the battery pack, playing a role in fireproofing and heat insulation, and increasing the safety of electric vehicles.

[0003] The structure of the plug-in battery cells currently on the market is relatively complex, resulting in high production costs. At the same time, the plug-in battery cell structure itself is relatively fragile and easily deformed by squeezing, which will lead to poor connections, and then easily cause safety accidents such as overheating and smoke, which will lead to battery short circuit, leakage and other problems, affecting its application value. The safety and stability are not high, and it is prone to safety accidents and short life.

[0004] To this end, we have developed a new puncture-resistant insert structure and a method for making it. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a puncture-resistant plug-in structure and a method for making the same, which solves the problem that the plug-in battery cell structure on the market in the prior art is relatively complex, resulting in high production costs. At the same time, the plug-in battery cell structure itself is relatively fragile and easily deformed by squeezing, and deformation will cause poor connection, which in turn is prone to safety accidents such as overheating and smoking, and further leads to problems such as battery short circuit and leakage, affecting its application value. The safety and stability are not high, and it is prone to safety accidents and short life.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a puncture-resistant insert structure, including an insert structure body, the insert structure body is a sandwich structure, and the insert structure body is composed of an intermediate layer for releasing water and a trigger layer located on the upper and lower surfaces, the interior of the intermediate layer is composed of independent water droplets, the interior of each of the water droplets is added with a foaming agent, and the surface of each of the water droplets is wrapped with a capsule film layer, and the water droplets and the upper and lower surfaces of the insert structure body are connected to each other through water-conducting fibers.

[0009] Preferably, the trigger layer is an oily capsule structure, the interior of the oily capsule structure contains a mineral oil solvent, and the membrane layer of the oily capsule structure is made of sodium alginate to form a surface membrane. After the membrane is thermally triggered and rapidly oxidized and ruptured, the oily solvent inside is quickly released.

[0010] Preferably, the film layer can also be made of water-based glutinous rice or palm wax, and the oily solvent can be No. 8 solvent or No. 6 solvent.

[0011] Preferably, the capsule membrane layer is a powdered membrane structure, and the oily solvent will quickly absorb the membrane structure into the middle of the solvent, thereby releasing moisture from the middle of the capsule membrane layer.

[0012] Preferably, the water droplets are ultrapure water, and the water content of the insert structure body is 97%.

[0013] A method for manufacturing a puncture-resistant insert structure, wherein the manufacturing of the intermediate layer comprises the following specific steps:

[0014] Step 1: First, carbonate ions or sulfate ions with a concentration of not less than three moles per liter, pre-filming agent, insulating particles, water-conducting particles and enhancement structure are compounded to form a powdered film structure, and water droplets are rolled over the surface of the film structure to automatically coat the surface with a layer of powder, thereby generating a large number of independent water droplets with the powdered film structure coated on the surface;

[0015] Step 2: First, silicon powder is used to prevent adhesion between the powder containing water droplets and the powder, so that the micro-footballs will not be too firmly bonded to each other and avoid merging with each other;

[0016] Step 3: Use hot melt or light curing and adhesive to bond multiple micro footballs as a whole to form an intermediate layer structure.

[0017] (III) Beneficial effects

[0018] The present invention provides a puncture-resistant insert structure and a manufacturing method thereof, which has the following beneficial effects:

[0019] The puncture-resistant insert structure and its manufacturing method provide a new insert structure. First, the insert structure body is a sandwich structure, and is composed of an intermediate layer for releasing water and a trigger layer located on the upper and lower surfaces, which can provide a multi-layer protection mechanism for the battery cell inside the insert structure body. Secondly, the intermediate layer can absorb the impact force during puncture. At the same time, the operating mechanism adopted makes the intermediate layer only leave the material in the form of a water drop after rupture, making the entire material into a pool of water, and these water droplets are difficult to spread on metal and various surfaces, and realize the path for power generation. Moreover, if ultrapure water is used, the water droplets will only evaporate in the end without forming a conductive medium. It has high safety and stability, and can avoid short circuits and fires caused by puncture. This structure is particularly suitable for application scenarios requiring high safety, such as outdoor power supplies, electric vehicles, etc., has higher engineering application value, and is of great significance to the puncture resistance and fire resistance of battery cells. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment: The embodiment of the present invention provides a puncture-resistant insert structure, including an insert structure body, the insert structure body is a sandwich structure, and the insert structure body is composed of an intermediate layer for releasing water and a trigger layer located on the upper and lower surfaces, the interior of the intermediate layer is composed of independent water droplets, and a foaming agent is added inside each water droplet, and the foaming agent can increase its convection characteristics, and the surface of each water droplet is wrapped with a capsule film layer, when triggered by external conditions such as heat, the capsule film layers wrapped on the surface of these water droplets will be destroyed, and these capsule film layers will release the water inside, and the water droplets will drown in large quantities, and the water droplets and the upper and lower surfaces of the insert structure body are connected to each other through water-conducting fibers;

[0022] Among them, the trigger layer is an oily capsule structure, the interior of the oily capsule structure contains mineral oil solvent, among which the oily solvent is selected from No. 8 solvent or No. 6 solvent, and the membrane layer of the oily capsule structure is made of sodium alginate (the membrane layer can also be made of water-based glutinous rice or palm wax) to make a surface membrane. After the above-mentioned membrane is thermally triggered and rapidly oxidized and ruptured, the internal oily solvent will be quickly released.

[0023] This oily solvent is isolated from the middle layer under normal conditions, and will be unsealed under hot conditions. After unsealing, the oily solvent will quickly change the surface tension of the middle layer of the capsule membrane to force the bubbles formed in the capsule membrane to shrink and collapse quickly.

[0024] That is, due to the special solubility of the material, the capsule film layer can be specifically dissolved, more water can be quickly released from the capsule film layer in a short time, and it has fluidity;

[0025] Specifically, the capsule membrane layer uses a powdered membrane structure, and the above-mentioned oily solvent will quickly absorb the membrane structure into the middle of the solvent, thereby releasing moisture from the middle of the capsule membrane layer.

[0026] Accordingly, the water droplets are made of ultrapure water, and the water content of the insert structure is 97%, which means that there are more fire risk factors in the whole material, the combustible load is larger, and it is not easy to burn;

[0027] Then when this material is subjected to high temperature, or in some special cases, such as when the insert structure is installed in the battery cell position for actual application: in the process of puncturing the experimental battery, when the battery cell is penetrated, our material will be punctured first, and due to the metal properties of the puncturing object itself - its iron-containing properties, the oily capsule membrane of the trigger layer on both sides is decomposed by iron catalysis, and the oily capsule structure is triggered and ruptured by rapid oxidation, and the internal oily solvent will be released quickly, and after the release, the membrane structure of the middle layer will be rapidly destroyed, and the water will be released in a large range in a very short time. This water will directly follow the puncture body into the deeper battery cell, thereby completing timely digestion. A special effect of this insert structure is that it is relatively resistant to puncture;

[0028] At the same time, when the middle layer of the plug structure breaks, it will only leave the material in the form of a water droplet, turning the entire material into a pool of water. These water droplets are difficult to spread on metal and various surfaces and realize the path for power generation. Moreover, if ultrapure water is used, the water droplets will only evaporate in the end and will not form a conductive medium. This is a very advanced technology.

[0029] A method for manufacturing a puncture-resistant insert structure, wherein the manufacturing of the middle layer comprises the following specific steps:

[0030] Step 1: First, carbonate ions or sulfate ions with a concentration of not less than three moles per liter, pre-filming agent, insulating particles, water-conducting particles and enhancement structure are compounded to form a powdered film structure, and water droplets are rolled over the surface of the film structure to automatically coat the surface with a layer of powder, thereby generating a large number of independent water droplets with the powdered film structure coated on the surface;

[0031] Step 2: First, silicon powder is used to prevent adhesion between the powder containing water droplets and the powder, so that the micro-footballs will not be too firmly bonded to each other and avoid merging with each other;

[0032] Step 3: Use hot melt or light curing and adhesive to bond multiple micro footballs as a whole to form an intermediate layer structure.

[0033] As a new puncture-resistant plug structure and a manufacturing method thereof, the present invention provides a brand-new plug structure. Firstly, the plug structure body is a sandwich structure, and is composed of an intermediate layer for releasing water and a trigger layer located on the upper and lower surfaces, which can provide a multi-layer protection mechanism for the battery cell inside the plug structure body. Secondly, the intermediate layer can absorb the impact force during puncture. At the same time, the operating mechanism adopted makes it possible for the intermediate layer to leave the material only in the form of a water drop after being broken, so that the entire material becomes a pool of water, and these water droplets are difficult to spread on metal and various surfaces, and realize the path for power generation. Moreover, if ultrapure water is used, the water droplets will only evaporate in the end without forming a conductive medium. It has high safety and stability, and can avoid short circuits and fires caused by puncture.

[0034] In summary, the plug structure provided by the present invention is particularly suitable for application scenarios requiring high safety, such as outdoor power supplies, electric vehicles, etc., has higher engineering application value, and is of great significance to the puncture resistance and fire resistance of battery cells.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the equivalents of the appended claims.

Claims

1. A puncture-resistant insert structure, comprising an insert structure body, characterized in that: The insert structure body is a sandwich structure, and the insert structure body is composed of a middle layer for releasing water and trigger layers located on the upper and lower surfaces. The interior of the middle layer is composed of independent water droplets, and a foaming agent is added to the interior of each water droplet, and the surface of each water droplet is wrapped with a capsule film layer.

2. The puncture-resistant insert structure according to claim 1, characterized in that: The trigger layer is an oily capsule structure, the interior of the oily capsule structure contains a mineral oil solvent, and the membrane layer of the oily capsule structure is made of sodium alginate to form a surface membrane. After the membrane is thermally triggered and rapidly oxidized and ruptured, the oily solvent inside is quickly released.

3. The puncture-resistant insert structure according to claim 2, characterized in that: The film layer can also be made of water-based glutinous rice or palm wax, and the oily solvent can be No. 8 solvent or No. 6 solvent.

4. The puncture-resistant insert structure according to claim 3, characterized in that: The capsule membrane layer adopts a powdered membrane structure, and the oily solvent will quickly absorb the membrane structure into the middle of the solvent, thereby releasing water from the middle of the capsule membrane layer.

5. The puncture-resistant insert structure according to claim 3, characterized in that: The water droplets are ultrapure water, and the water content of the insert structure body is 97%.

6. The method for manufacturing a puncture-resistant insert structure according to claim 4, characterized in that: The preparation of the intermediate layer comprises the following specific steps: Step 1: First, carbonate ions or sulfate ions with a concentration of not less than three moles per liter, pre-filming agent, insulating particles, water-conducting particles and enhancement structure are compounded to form a powdered film structure, and water droplets are rolled over the surface of the film structure to automatically coat the surface with a layer of powder, thereby generating a large number of independent water droplets with the powdered film structure coated on the surface; Step 2: First, silicon powder is used to prevent adhesion between the powder containing water droplets and the powder, so that the micro-footballs will not be too firmly bonded to each other and avoid merging with each other; Step 3: Use hot melt or light curing and adhesive to bond multiple micro footballs as a whole to form an intermediate layer structure.