A Li-Mn battery generally refers to a lithium dioxide manganese battery. It is a type of battery in which lithium is used as the negative electrode and manganese dioxide is used as the positive electrode.
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The low and medium rate discharge performance of the lithium dioxide manganese battery is good, the price is cheap, and the safety performance is good. It is competitive with conventional batteries, and therefore was the first type of lithium battery to be commercialized.
Using a fully sealed cylindrical winding Li-Mn battery as an example, this article explains the basic manufacturing process for this type of battery, as well as the process flow.
1. Preparation of the manganese dioxide positive electrode
Mix heat-treated electrolytic manganese dioxide powder with acetylene black, polytetrafluoroethylene emulsion, isopropyl alcohol in a certain proportion to form a paste. Then the paste is evenly coated onto a metal collector grid for heat treatment and rolling to form an electrode. Another method is to heat the prepared positive electrode paste and place it on both sides of the metal collector through a rolling machine to produce an electrode. The prepared electrode should be placed in an environment with humidity less than 2%.
2. Preparation of the lithium metal negative electrode
Select lithium strips of the appropriate thickness and width according to the model of the Li Mno2 cell and cut them into the required length. Then, the electrode tabs are cold welded onto the cut lithium strips. The preparation of the negative electrode must be performed in an environment with relative humidity less than 2%.
3. Preparation of the separator
Dry polypropylene separator of the required thickness and width, and store it in an environment with humidity less than 2%. A composite separator that can be closed at 130-160℃ is usually selected.
4. Preparation of the Li-Mn battery core
Wrap two layers of separators slightly wider than the electrodes on both sides of the manganese dioxide positive electrode in an environment with humidity less than 2%, so as to separate the positive electrode from the lithium negative electrode. Then, wind it into a core on a winder and place it in the battery case. The winding structure of the Li-Mn battery core is shown in the figure.
5. Preparation of electrolyte solution
There are different formulae for the electrolyte solutions of different lithium manganese dioxide battery suppliers. The basic preparation method is to mix dehydrated lithium perchlorate with purified propylene carbonate, ethylene glycol dimethyl ether and other components in a proportion. The preparation of the electrolyte solution should be carried out in a dry air environment with humidity less than 2%.
6. Injection and sealing welding of the electrolyte solution
Firstly, weld the upper cover with glass insulators to the shell with the electrode core installed, and then inject the prescribed amount of electrolyte solution into the battery through the injection hole using an injection machine. Finally, seal the hole with a steel ball by welding.
The Comprehensive Analysis of Lithium Manganese Dioxide (Li/MnO₂) Pouch Battery
In the ever-evolving landscape of energy storage solutions, Lithium Manganese Dioxide (Li/MnO₂) pouch batteries have emerged as a reliable and efficient choice for various applications. The Li/MnO₂ pouch battery, also known as the Lithium Manganese Dioxide Soft Pack Battery or the Lithium-Manganese Primary Battery, offers numerous advantages that make it a preferred option for various industries. This comprehensive analysis explores the key features, benefits, applications, and future prospects of the Li/MnO₂ pouch battery.
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I. Introduction to Lithium Manganese Dioxide (Li/MnO₂) Pouch Battery
The Li/MnO₂ pouch battery is a type of primary lithium battery that utilizes lithium metal as the anode and manganese dioxide (MnO₂) as the cathode. The pouch design provides flexibility in size and shape, enabling manufacturers to customize the battery to fit the specific requirements of electronic products. The Li/MnO₂ chemistry offers high energy density, good stability, and a wide operating temperature range, making it a suitable choice for various applications.
II. Key Features of Li/MnO₂ Pouch Battery
Flexible in Size: The pouch design allows for significant flexibility in battery size. Manufacturers can customize the dimensions of the battery to fit the specific needs of customers' electronic products. This flexibility in size enables the Li/MnO₂ pouch battery to be integrated into a wide range of devices, from small electronic tags to larger industrial equipment.
Strong Wide-Temperature Load Capacity: The Li/MnO₂ chemistry exhibits excellent load capacity in wide-temperature environments. These batteries can operate effectively in temperatures ranging from -40°C to +60°C, making them suitable for applications in extreme environments.
Volume Saving Capacity: Compared to other battery types, the Li/MnO₂ pouch battery offers significant volume savings. At the same capacity, the pouch battery can save approximately 20% of the volume compared to traditional battery designs. This feature allows for more efficient use of space in electronic devices, enabling manufacturers to create sleeker and more compact products.
III. Benefits of Li/MnO₂ Pouch Battery
High Energy Density: The Li/MnO₂ chemistry offers high energy density, enabling the battery to store more energy per unit volume or weight. This feature allows for longer operating times or higher performance in electronic devices.
Long Shelf Life: The Li/MnO₂ pouch battery has a long shelf life, which means it can be stored for extended periods without significant loss of performance. This feature is especially beneficial for applications that require batteries to be ready for use after long periods of inactivity, such as electronic shelf labels or backup systems.
Environmental Friendliness: Lithium Manganese Dioxide batteries are generally considered to be environmentally friendly. The materials used in their construction are relatively benign, and the batteries can be recycled or disposed of in an environmentally responsible manner.
IV. Applications of Li/MnO₂ Pouch Battery
The Li/MnO₂ pouch battery finds widespread applications in various industries due to its unique features and benefits. Some of the key applications include:
Electronic Shelf Labels: The Li/MnO₂ pouch battery is a popular choice for electronic shelf labels due to its long shelf life and ability to operate in a wide temperature range. These batteries power the displays on shelf labels, enabling retailers to update pricing and product information quickly and efficiently.
Intelligent Transportation: In the field of intelligent transportation, the Li/MnO₂ pouch battery powers various devices, including sensors, trackers, and communication modules. The batteries' reliability and durability make them suitable for applications that require continuous operation in harsh environments.
Smart Security: The Li/MnO₂ pouch battery is used in various smart security devices, such as motion sensors, smoke detectors, and alarm systems. The batteries' long shelf life and ability to operate in extreme temperatures ensure that these devices remain operational and reliable.
Instrumentation: The Li/MnO₂ pouch battery is a reliable power source for various instrumentation applications, including medical devices, meters, and gauges. The batteries' high energy density and stability make them suitable for powering precision instruments that require accurate and reliable operation.
Consumer Electronics: The Li/MnO₂ pouch battery is also used in various consumer electronics products, such as remote controls, watches, and toys. The batteries' compact size and light weight enable manufacturers to create sleek and portable products that are easy to use and transport.
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