Button cell anti-mistaken eating bitter agent coating and preparation method thereof

Abstract

The invention discloses a bitter agent coating for preventing mistaken eating of a button cell and a preparation method thereof, the bitter agent coating is prepared from a solvent, a food-grade thickener, a bitter agent, an electrolyte and a coloring agent, and the bitter agent coating is dispensed on the surface of a negative electrode of the button cell in a dispersed dotted form to form array distribution. The point-like discrete array point coating mode avoids the contact position of the central electrode of the negative electrode of the battery, so that the influence of the electrical insulation characteristic of the coating on the discharge performance of the battery during use can be avoided, and meanwhile, the coating of the high-bitterness coating is facilitated. The discrete dot array bitter agent coating on the surface of the battery can be quickly dissolved and release a large amount of bitter taste after being in contact with saliva, and the coloring agent can leave marks on the lips and other parts of children. When a child mistakenly eats the button cell containing the coating, the child can feel strong bitterness stimulation and actively spits the button cell, so that the swallowing behavior of the child is stopped, and the trace left by the coloring agent can be convenient for a guardian to timely perceive the mistaken eating behavior of the child.

Description

Technical Field

[0001] This invention belongs to the technical field of button batteries and relates to a bitter coating and its preparation method, specifically to a button battery coating for preventing accidental ingestion of bitter agents and its preparation method. Background Technology

[0002] Button batteries are flat, button-shaped disposable or rechargeable power sources. Due to their high energy density, stable discharge characteristics, and compact physical form, they are widely used in various portable electronic devices such as watches, calculators, and miniature medical devices. However, the small size of button batteries makes them extremely easy for children to ingest, causing serious injuries such as choking, chemical burns, and even death. Therefore, effective measures are needed to prevent children from accidentally ingesting them.

[0003] Conventional measures to prevent accidental ingestion mainly involve protective packaging and labeling the packaging with risks to remind guardians to protect children. However, these measures do not fundamentally solve the problem of accidental ingestion, and guardians cannot constantly monitor children, thus their effectiveness is very limited. Currently, a method has emerged that coats the surface of button batteries with a bittering agent, causing children to voluntarily spit them out upon swallowing them due to the bitter taste. This method fundamentally prevents children from intentionally swallowing batteries and has great application potential.

[0004] CN120082245A proposes an immersion method to form a uniform bittering agent coating on the surface of a button battery. Although this method successfully achieved a bitter taste on the battery surface without a significant decrease in battery performance, the following problems still exist: ① The uniform coating method covers the electrode contacts; ② To avoid affecting battery performance, the bittering agent coating is relatively thin, and the bittering agent content is limited (0.1%~0.3% by weight), resulting in limited bitterness; ③ If a child accidentally ingests the battery, it is difficult for guardians to detect it in time.

[0005] Therefore, a new bitter coating solution needs to be designed that can ensure strong bitterness without affecting battery performance, and also has a certain warning function to help guardians promptly detect children accidentally swallowing batteries. Summary of the Invention

[0006] The purpose of this invention is to provide a bitter-tasting coating for button batteries and its preparation method. This coating can cause children to spit out the button battery due to the strong bitter taste when they swallow it. The coating color can help guardians to detect risky behaviors before children accidentally swallow button batteries, so that measures can be taken in time to prevent accidental ingestion. The discrete array dot coating method can avoid the coating being too thick, which would affect the battery insulation and reduce its performance.

[0007] The objective of this invention is achieved through the following technical solution: A bittering agent coating for button batteries, designed to prevent accidental ingestion, is made of solvent, food-grade thickener, bittering agent, electrolyte, and colorant. It is applied in a dispersed dot-like pattern to the surface of the negative electrode of the button battery, forming an array-like distribution. The solvent is water, and its content is 80-88% of the mass of the bittering agent coating. The food-grade thickener is one or more of the following: gelatin, carrageenan, gum arabic, tamarind gum, guar gum, agar, sodium alginate, carrageenan, pectin, xanthan gum, β-cyclodextrin, sodium carboxymethyl cellulose, sodium starch phosphate, sodium carboxymethyl starch, hydroxypropyl starch, and propylene glycol alginate, and its content is 10-15% of the bittering agent coating mass. The bittering agent is one or more of benzyl dinatamide, bitter melon extract, and coptis extract, and its content is 2-4% of the bittering agent coating mass. The electrolyte is sodium chloride and sodium sulfate, with the sodium chloride content being 0.5-1% of the mass of the bittering agent coating and the sodium sulfate content being 0.1-0.3% of the mass of the bittering agent coating. The colorant is a non-red food coloring, and its content is 0.01% to 0.06% of the bittering agent coating mass. The bittering agent coating is applied in a dotted circular array on the edge of the negative electrode surface of the button battery. The dotting position avoids the central electrode contact point of the negative electrode of the button battery, thereby avoiding any impact on battery performance during use. This design also helps to increase the bitterness of the bittering agent.

[0008] A method for preparing the above-mentioned anti-ingestion bitterness coating for button batteries includes the following steps: Step S1: Mix solvent, food-grade thickener, bittering agent, electrolyte, and coloring agent in proportion, and obtain a bittering agent coating colloid after vacuum degassing; Step S2: Using a dispensing machine, the anti-accidental ingestion bitterness agent coating colloid is evenly applied to the surface of the negative electrode of the button battery. After drying and curing, the anti-accidental ingestion bitterness agent coating is obtained. The specific drying steps are as follows: Step S2-1: Place the button battery coated with the anti-ingestion bitterness agent gel in a 40~60℃ oven and heat for 5~15 seconds to evaporate most of the solvent; Step S2-2: Place the product from step S2-1 in a clean, dry room to air dry naturally, allowing the coating to fully cure.

[0009] Compared with the prior art, the present invention has the following advantages: (1) The dotted discrete array dot coating method of the present invention avoids the contact position of the central electrode of the negative electrode of the battery, which can avoid the influence of the electrical insulation characteristics of the bitter agent coating on the battery discharge performance during use, and at the same time is conducive to the coating of high bitterness.

[0010] (2) The anti-ingestion bitter coating of the present invention has a strong bitter taste. When a child swallows a button battery, it quickly dissolves in saliva to produce a bitter taste, which stimulates the child to spit it out, thereby preventing accidental ingestion.

[0011] (3) The anti-ingestion bitter agent coating of the present invention contains non-red food coloring. When children lick or put the battery in their mouths, which pose a risk of ingestion, the coating will leave obvious marks after contact with their saliva and other moist skin. This makes it easier for guardians to detect the risk of children swallowing batteries in advance and take timely intervention measures to effectively prevent accidental ingestion.

[0012] (4) The anti-ingestion bitter agent coating of the present invention has good adhesion and will not easily fall off after being coated on the surface of the button battery. Attached Figure Description

[0013] Figure 1 It is a button battery with a coating containing a bittering agent to prevent accidental ingestion; Figure 2 This is a schematic diagram of the manufacturing process of a button battery containing a bittering agent coating to prevent accidental ingestion; Figure 3 These are examples of button batteries with an anti-swallowing bitterness coating, as exemplified in Example 1 and Comparative Example 1, and conventional button batteries without an anti-swallowing bitterness coating. Figure 4 The data are constant resistance discharge data of Example 1 (odd numbers 1, 3, 5, 7, 9) and Comparative Example 1 (even numbers 2, 4, 6, 8) under 20 °C with an external 3 kΩ load connected to a 3 kΩ load. In the figure, 1001 - button battery with anti-swallowing bittering agent coating, 1002 - battery positive electrode, 1003 - battery negative electrode, 1004 - anti-swallowing coating, 1005 - electrode contact range on the surface of negative electrode, 2001 - coating raw material mixture, 3001 - button battery without anti-swallowing bittering agent coating. Detailed Implementation

[0014] The technical solution of the present invention will be further described below with reference to the accompanying drawings, but it is not limited thereto. Any modifications or equivalent substitutions to the technical solution of the present invention that do not depart from the spirit and scope of the technical solution of the present invention should be covered within the protection scope of the present invention.

[0015] This invention provides a button battery 1001 with a coating containing a bittering agent to prevent accidental ingestion, such as... Figure 1As shown, the button battery includes a positive electrode 1002, a negative electrode 1003, and an anti-swallowing coating 1004. The anti-swallowing coating 1004 is applied in a dispersed dotted pattern on the surface of the negative electrode 1003, forming an array distribution that avoids the electrode contact area 1005 on the surface of the negative electrode. The anti-swallowing coating 1004 is made of a solvent, a food-grade thickener, a bittering agent, an electrolyte, and a colorant. The solvent is water, and its content is 80-88% of the bittering agent coating mass. The food-grade thickener is one or more of gelatin, carrageenan, gum arabic, tamarind gum, guar gum, agar, sodium alginate, carrageenan, pectin, xanthan gum, β-cyclodextrin, sodium carboxymethyl cellulose, sodium starch phosphate, sodium carboxymethyl starch, hydroxypropyl starch, and propylene glycol alginate. The content is 10-15% of the bittering agent coating mass; the bittering agent is one or more of benzyl dinatamine, bitter melon extract, and coptis extract, with a content of 2-4% of the bittering agent coating mass; the electrolyte is sodium chloride and sodium sulfate, with sodium chloride content of 0.5-1% of the bittering agent coating mass and sodium sulfate content of 0.1%-0.3% of the bittering agent coating mass; the colorant is a non-red food coloring, with a content of 0.01%-0.06% of the bittering agent coating mass.

[0016] This invention also provides a method for preparing the above-mentioned anti-ingestion bitterness coating for button batteries, such as... Figure 2 As shown, the process mainly includes mixing and stirring the coating raw material mixture 2001 and vacuum degassing, high-precision array dot coating of the coating raw material mixture 2001 onto the surface of the battery negative electrode 1003, and heating, drying and natural air curing of the anti-swallowing coating 1004. The specific steps are as follows: Step S1: Mix solvent, food-grade thickener, bittering agent, electrolyte, and coloring agent in proportion, and obtain a bittering agent coating colloid after vacuum degassing; Step S2: Using a dispensing machine, the anti-accidental ingestion bitterness-preventing coating colloid is evenly applied to the surface of the negative electrode of the button battery to form an anti-accidental ingestion bitterness-preventing coating array. After drying and curing, a button battery containing the anti-accidental ingestion bitterness-preventing coating is obtained. The specific drying steps are as follows: Step S2-1: Place the button battery coated with the anti-ingestion bitterness agent gel in a 40~60℃ oven and heat for 5~15 seconds to evaporate most of the solvent; Step S2-2: Place the product from step S2-1 in a clean, dry room to air dry naturally, allowing the coating to fully cure.

[0017] In this invention, the discrete dot-array bittering agent coating on the battery surface dissolves rapidly upon contact with saliva, releasing a large amount of bitterness. The colorant leaves traces on areas such as the child's lips. When a child accidentally ingests a button battery containing this coating, the intense bitterness will trigger the urge to spit it out, thus stopping the ingestion. Furthermore, the traces left by the colorant allow guardians to promptly detect any accidental ingestion, while also preventing the insulating properties from affecting battery performance.

[0018] Example 1: In this embodiment, the anti-ingestion bittering agent coating uses gelatin and carrageenan as thickeners, accounting for 6% and 6.5% of the total coating mass, respectively; denatum benzylamine is selected as the bittering agent, accounting for 2% of the total coating mass; sodium chloride and sodium sulfate are selected as electrolytes, accounting for 0.7% and 0.15% of the total coating mass, respectively; purple sweet potato pigment is selected as the colorant, accounting for 0.01% of the total coating mass; and distilled water is selected as the solvent, accounting for 84.64% of the total coating mass. Figure 2 The preparation process shown involves forming an array of anti-ingestion bittering agent coatings on the negative electrode of a CR2032 button cell.

[0019] Example 2: In this embodiment, the anti-ingestion bittering agent coating uses gelatin as a thickener, accounting for 10% of the total coating mass; Coptis chinensis extract is selected as the bittering agent, accounting for 2% of the total coating mass; sodium chloride and sodium sulfate are selected as electrolytes, accounting for 0.5% and 0.1% of the total bittering agent coating mass, respectively; phycocyanin is selected as a colorant, accounting for 0.01% of the total bittering agent coating mass; and distilled water is selected as a solvent, accounting for 87.39% of the total coating mass. Figure 2 The preparation process shown involves forming an array of anti-ingestion bittering agent coatings on the negative electrode of a CR2032 button cell.

[0020] Example 3: In this embodiment, the anti-ingestion bittering agent coating uses carrageenan as a thickener, accounting for 15% of the total coating mass; bitter melon extract as a bittering agent, accounting for 3% of the total bittering agent coating mass; sodium chloride and sodium sulfate as electrolytes, accounting for 1% and 0.3% of the total coating mass, respectively; citrus yellow as a colorant, accounting for 0.03% of the total coating mass; and distilled water as a solvent, accounting for 80.67% of the total coating mass. Figure 2 The preparation process shown forms an array of bittering agent coatings to prevent accidental ingestion on the negative electrode of a button cell.

[0021] Example 4: In this embodiment, the anti-ingestion bittering agent coating uses gelatin and carrageenan as thickeners, accounting for 6.1% and 6.3% of the total coating mass, respectively; benzodiazepine and bitter melon extract are selected as bittering agents, accounting for 1.1% and 1% of the total coating mass, respectively; sodium chloride and sodium sulfate are selected as electrolytes, accounting for 0.7% and 0.15% of the total coating mass, respectively; tea green pigment is selected as colorant, accounting for 0.03% of the total coating mass; and distilled water is selected as solvent, accounting for 84.37% of the total coating mass. Figure 2 The preparation process shown forms an array of bittering agent coatings to prevent accidental ingestion on the negative electrode of a button cell.

[0022] Comparative Example 1: Untreated CR2032 button batteries without an anti-swallowing bittering agent coating.

[0023] Discharge performance test: Constant resistance discharge: At a temperature of 20℃, an external 3 kΩ load is connected to discharge to 2.0 V and then terminates.

[0024] The following is a description of the test results from the control experiment: Figure 4 The data are constant resistance discharge data of Example 1 (odd numbers 1, 3, 5, 7, 9) and Comparative Example 1 (even numbers 2, 4, 6, 8) under 20°C conditions with an external 3 kΩ load.

[0025] Constant resistance discharge tests were conducted using samples with similar opening voltage, initial voltage, and battery capacity. The figures show that the odd and even numbered samples reached the specified voltage in the same time and discharged accordingly, with the deviation falling within the reasonable error range of the test. This fully demonstrates that the anti-ingestion bittering agent coating proposed in this invention achieves its anti-ingestion function without affecting the battery discharge performance.

Claims

1. A coating for button batteries to prevent accidental ingestion of bitter substances, characterized in that... The bittering agent coating is made of solvent, food-grade thickener, bittering agent, electrolyte, and colorant. It is applied to the surface of the negative electrode of the button battery in a dispersed dotted form, forming an array distribution. The solvent content is 80-88% of the bittering agent coating mass; the food-grade thickener content is 10-15% of the bittering agent coating mass; the bittering agent content is 2-4% of the bittering agent coating mass; the electrolyte is sodium chloride and sodium sulfate, with sodium chloride content at 0.5-1% and sodium sulfate content at 0.1-0.3% of the bittering agent coating mass; and the colorant content is 0.01%-0.06% of the bittering agent coating mass.

2. The button battery anti-ingestion bitterness agent coating according to claim 1, characterized in that... The solvent is water.

3. The button battery anti-ingestion bitterness agent coating according to claim 1, characterized in that... The food-grade thickener is one or more of the following: gelatin, carrageenan, gum arabic, tamarind gum, guar gum, agar, sodium alginate, carrageenan, pectin, xanthan gum, β-cyclodextrin, sodium carboxymethyl cellulose, sodium starch phosphate, sodium carboxymethyl starch, hydroxypropyl starch, and propylene glycol alginate.

4. The button battery anti-ingestion bitterness agent coating according to claim 1, characterized in that... The bittering agent is one or more of benzyl dinatamine, bitter melon extract, and coptis extract.

5. The button battery anti-ingestion bitter agent coating according to claim 1, characterized in that... The colorant is a non-red food coloring.

6. The button battery anti-ingestion bitterness agent coating according to claim 1, characterized in that... The coating is applied in a dotted circular array on the edge of the negative electrode surface of the button battery.

7. The button battery anti-ingestion bitterness agent coating according to claim 1, characterized in that... The coating is applied in spots that avoid the center electrode contact point of the negative electrode of the button battery.

8. A method for preparing the anti-ingestion bitterness coating for a button battery according to any one of claims 1-7, characterized in that... The method includes the following steps: Step S1: Mix solvent, food-grade thickener, bittering agent, electrolyte, and coloring agent in proportion, and obtain a bittering agent coating colloid after vacuum degassing; Step S2: Using a dispensing machine, the anti-accidental ingestion bitterness agent coating colloid is evenly applied to the surface of the negative electrode of the button battery. After drying and curing, the anti-accidental ingestion bitterness agent coating is obtained.

9. The method for preparing the anti-ingestion bitterness agent coating for button batteries according to claim 8, characterized in that... The specific steps for drying and curing are as follows: Step S2-1: Place the button battery coated with the anti-ingestion bitterness agent gel in a 40~60℃ oven and heat for 5~15 seconds to evaporate most of the solvent; Step S2-2: Place the product from step S2-1 in a clean, dry room to air dry naturally, allowing the coating to fully cure.

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