Explosion-proof alkaline battery

Abstract

The utility model discloses an explosion -proof type alkaline battery, including positive pole filling layer and negative pole filling layer, the outside of positive pole filling layer is wrapped with steel shell, the inside fixedly connected with copper needle of negative pole filling layer, and the bottom fixedly connected with the connecting head of copper needle, and the bottom fixedly connected with negative pole connector of connecting head, be equipped with diaphragm layer between negative pole filling layer and positive pole filling layer, the top fixedly connected with positive pole connector of positive pole filling layer, and positive pole connector passes through steel shell, and the bottom -most of steel shell is inlayed and is pressed and has sealing ring, and the middle position of sealing ring is equipped with the installation mouth, and negative pole connector is located in the installation mouth, and the outside of steel shell is coated with explosion -proof layer, the utility model discloses not only can release the high pressure gas inside battery in time through explosion -proof valve, avoid the explosion of battery because of the pressure is too high, can also further strengthen the explosion -proof effect of battery through explosion -proof layer.

Description

Technical Field

[0001] This utility model relates to the field of alkaline battery technology, and in particular to an explosion-proof alkaline battery. Background Technology

[0002] Alkaline batteries, also known as alkaline zinc-manganese batteries, use zinc as the negative electrode and manganese dioxide as the positive electrode. The electrolyte is made of solutions such as potassium hydroxide or sodium hydroxide, and they adopt a reverse polarity structure design.

[0003] However, the following defects still exist. Under conditions of high humidity, high temperature or severe impact, the internal pressure of traditional alkaline batteries may gradually increase, eventually leading to battery bulging or even explosion, posing a potential threat to the personal safety of users. In order to better address the above problems, promote the development of industry technology, and improve core competitiveness, this application proposes a new composition structure that is different from the existing technology. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an explosion-proof alkaline battery.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An explosion-proof alkaline battery includes a positive electrode filling layer and a negative electrode filling layer. The positive electrode filling layer is wrapped with a steel shell. A copper needle is fixedly connected inside the negative electrode filling layer. A connector is fixedly connected to the bottom of the copper needle. A negative electrode connector is fixedly connected to the bottom end of the connector. A separator layer is provided between the negative electrode filling layer and the positive electrode filling layer. A positive electrode connector is fixedly connected to the top of the positive electrode filling layer and passes through the steel shell. A sealing ring is embedded and pressed at the bottom of the steel shell. An installation port is opened in the middle of the sealing ring, and the negative electrode connector is located in the installation port. An explosion-proof layer is coated on the outside of the steel shell. A connection port is opened on one side of the steel shell, and an explosion-proof valve is fixed inside the connection port.

[0007] As a further improvement of this invention, the explosion-proof layer is made of polyphenylene sulfide.

[0008] As a further improvement of this invention, the explosion-proof layer is made of aluminum alloy.

[0009] As a further improvement of this invention, the explosion-proof layer is made of stainless steel.

[0010] As a further embodiment of this invention, the membrane layer is a cellulose-based composite membrane.

[0011] As a further embodiment of this invention, the membrane layer is a polyolefin membrane.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. This utility model, through the setting of an explosion-proof valve, will cause the weak part of the explosion-proof valve to rupture or open when the internal pressure of the battery exceeds the set threshold due to thermal runaway or gas generation, so as to release the internal high-pressure gas in time and prevent the battery from exploding due to excessive pressure.

[0014] 2. By setting an explosion-proof layer, this utility model increases the fatigue resistance and mechanical properties of the battery exterior, further enhancing the explosion-proof effect of the battery. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the front side of an explosion-proof alkaline battery proposed in this utility model;

[0016] Figure 2 This is a bottom-view structural diagram of an explosion-proof alkaline battery proposed in this utility model.

[0017] Figure 3 This is a partial cross-sectional view of an explosion-proof alkaline battery proposed in this utility model.

[0018] Figure 4 This is a schematic diagram of the overall exploded structure of an explosion-proof alkaline battery proposed in this utility model.

[0019] In the diagram: 1. Steel shell; 2. Explosion-proof layer; 3. Explosion-proof valve; 4. Positive terminal connector; 5. Negative terminal connector; 6. Sealing ring; 7. Positive terminal filling layer; 8. Connector; 9. Diaphragm layer; 10. Negative terminal filling layer; 11. Copper needle. Detailed Implementation

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Therefore, all other embodiments of this application described herein, and all embodiments obtained by those skilled in the art without creative effort based on the embodiments in this application, should fall within the scope of protection of this application.

[0021] Example 1

[0022] Reference Figures 1-4 An explosion-proof alkaline battery includes a positive electrode filling layer 7 and a negative electrode filling layer 10. The positive electrode filling layer 7 is wrapped with a steel shell 1. A positive electrode connector 4 is welded to the top of the positive electrode filling layer 7 and passes through the steel shell 1.

[0023] like Figure 3 and Figure 4As shown, a copper needle 11 is provided inside the negative electrode filling layer 10, a connector 8 is welded to the bottom of the copper needle 11, a negative electrode connector 5 is welded to the bottom end of the connector 8, and a diaphragm layer 9 is provided between the negative electrode filling layer 10 and the positive electrode filling layer 7.

[0024] A sealing ring 6, which is a fluororubber gasket, is embedded and pressed at the bottom of the steel shell 1. The sealing ring 6 can give the battery good sealing performance and prevent electrolyte leakage. An installation port is opened in the middle of the sealing ring 6, and the negative terminal connector 5 is located in the installation port.

[0025] The separator layer 9 is a cellulose-based composite separator with a tensile strength ≥50MPa and a pore size of 0.05-0.2μm; the polyolefin separator needs to be labeled with a closed-cell temperature of 130-150℃, which not only has high ionic conductivity and excellent thermal stability, but also high strength and flexibility, which can effectively prevent internal short circuits and mechanical damage to the battery, and is easy to degrade, making it more environmentally friendly to use;

[0026] like Figure 1 As shown, the outer side of the steel shell 1 is coated with an explosion-proof layer 2. A connection port is provided on one side of the steel shell 1. An explosion-proof valve 3 is fixed in the connection port by laser welding. The explosion-proof valve 3 is model NF-DV01, with a thickness of 0.1-0.3mm in the weak part, and has a one-way valve structure to prevent backflow.

[0027] When the internal pressure of the battery exceeds the set threshold, such as 0.8-1.2MPa, due to thermal runaway or gas generation, the weak part of the explosion-proof valve 3 will rupture or open, releasing the internal high-pressure gas in time and preventing the battery from exploding due to excessive pressure.

[0028] The explosion-proof layer 2 is made of polyphenylene sulfide coating with a spray thickness of 50-200μm. Polyphenylene sulfide has high mechanical strength and excellent wear resistance. It has good tensile strength and flexural strength and can withstand greater pressure and wear.

[0029] Working principle: During use, an explosion-proof valve 3 is installed on the outside of the steel shell 1. When the internal pressure of the battery exceeds the set threshold due to thermal runaway or gas generation, the weak part of the explosion-proof valve 3 will rupture or open, releasing the high-pressure gas inside in time and preventing the battery from exploding due to excessive pressure. At the same time, after the explosion-proof valve 3 is opened, its structural design should be able to prevent external air from flowing back into the battery and causing a secondary reaction. At the same time, an explosion-proof layer 2 made of polyphenylene sulfide is installed, which gives the outside of the battery high mechanical strength and excellent wear resistance. Its tensile strength and bending strength are good, and it can withstand greater pressure and wear.

[0030] Example 2

[0031] Reference Figures 1-4An explosion-proof alkaline battery includes a positive electrode filling layer 7 and a negative electrode filling layer 10. The positive electrode filling layer 7 is wrapped with a steel shell 1. Copper needles 11 are welded inside the negative electrode filling layer 10. A connector 8 is welded to the bottom of the copper needles 11. A negative electrode connector 5 is welded to the bottom of the connector 8. A separator layer 9 is provided between the negative electrode filling layer 10 and the positive electrode filling layer 7. The separator layer 9 is a polyolefin separator with a closed-cell temperature of 130-150℃. The polyolefin separator has good mechanical properties and can withstand the erosion of the electrolyte and the stability under high temperature environment, thereby ensuring the safety of the battery. It also has excellent ionic conductivity, which can ensure that the battery can carry out charging and discharging reactions efficiently.

[0032] A positive electrode connector 4 is welded to the top of the positive electrode filling layer 7, and the positive electrode connector 4 passes through the steel shell 1. A sealing ring 6 is embedded and pressed at the bottom of the steel shell 1. The sealing ring 6 can give the battery good sealing performance and prevent electrolyte leakage. An installation port is opened in the middle of the sealing ring 6, and the negative electrode connector 5 is located in the installation port. The outer side of the steel shell 1 is coated with an explosion-proof layer 2. A connection port is opened on one side of the steel shell 1, and an explosion-proof valve 3 is fixed inside the connection port. The explosion-proof valve 3 is model NF-DV01. When the internal pressure of the battery exceeds the set threshold due to thermal runaway or gas generation, the weak part of the explosion-proof valve 3 will rupture or open, releasing the internal high-pressure gas in time and preventing the battery from exploding due to excessive pressure. The explosion-proof layer 2 is made of aluminum alloy explosion-proof layer, which has certain flame retardancy and good thermal conductivity, and can quickly transfer the heat generated by the battery. At the same time, it has excellent fatigue resistance and mechanical properties, and can remain stable under high pressure environment, further enhancing the explosion-proof effect.

[0033] Working principle: During use, an explosion-proof valve 3 is installed on the outside of the steel shell 1. When the internal pressure of the battery exceeds the set threshold due to thermal runaway, gas generation, or other reasons, the weak part of the explosion-proof valve 3 will rupture or open, releasing the high-pressure gas inside in time and preventing the battery from exploding due to excessive pressure. At the same time, after the explosion-proof valve 3 is opened, its structural design should be able to prevent external air from flowing back into the battery and causing a secondary reaction. In addition, an explosion-proof layer 2 made of aluminum alloy is installed, which gives the alkaline battery flame retardancy and good thermal conductivity, enabling it to quickly transfer the heat generated by the battery. At the same time, it has excellent fatigue resistance and mechanical properties, and can remain stable under high pressure environment, further enhancing the explosion-proof effect.

[0034] This utility model has been described through the above embodiments. Those skilled in the art will understand that this utility model is not limited to the above embodiments. Many more modifications can be made based on the teachings of this utility model, and all such modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof alkaline battery, comprising a positive electrode filling layer (7) and a negative electrode filling layer (10), wherein the positive electrode filling layer (7) is wrapped with a steel shell (1), a copper needle (11) is fixedly connected inside the negative electrode filling layer (10), a connector (8) is fixedly connected to the bottom of the copper needle (11), a negative electrode connector (5) is fixedly connected to the bottom end of the connector (8), a separator layer (9) is provided between the negative electrode filling layer (10) and the positive electrode filling layer (7), a positive electrode connector (4) is fixedly connected to the top of the positive electrode filling layer (7), and the positive electrode connector (4) passes through the steel shell (1), a sealing ring (6) is embedded and pressed at the bottom of the steel shell (1), an installation opening is provided in the middle of the sealing ring (6), and the negative electrode connector (5) is located in the installation opening, characterized in that, The outer side of the steel shell (1) is coated with an explosion-proof layer (2), and a connection port is provided on one side of the steel shell (1), with an explosion-proof valve (3) fixed inside the connection.

2. The explosion-proof alkaline battery according to claim 1, characterized in that, The explosion-proof layer (2) is made of polyphenylene sulfide.

3. The explosion-proof alkaline battery according to claim 1, characterized in that, The explosion-proof layer (2) is made of aluminum alloy.

4. The explosion-proof alkaline battery according to claim 1, characterized in that, The explosion-proof layer (2) is made of stainless steel.

5. The explosion-proof alkaline battery according to claim 1, characterized in that, The membrane layer (9) is a cellulose-based composite membrane.

6. The explosion-proof alkaline battery according to claim 1, characterized in that, The membrane layer (9) is a polyolefin membrane.

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