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Many Cylindrical Batteries
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Prismatic VS Cylindrical Cells: Appearances & Acting & Applications

On the market, there are two common lithium-ion batteries: cylindrical cells and prismatic cells. Each type has unique characteristics and is used in various applications with different industry requirements for size, shape, energy density, and performance. The following content will help you learn about these when comparing prismatic vs cylindrical cells. Let’s dive in! Prismatic VS Cylindrical Cells in Appearance Both cells serve different purposes, so their appearance is also different in shape and size. Features Prismatic Cells Cylindrical Cells Shape Rectangular or square Always in Cylindrical Size Varied, but always with larger footprints and thinner Standardized sizes, like 18650 and 21700 Construction Encased in hard or soft shell by plastic or metal Encased in metal outer layer with safety vent Terminals Flat terminals or tabs on one or both sides Positive terminal on top, negative terminal on bottom Prismatic VS Cylindrical Cell in Performance 1. Density Both cells have different energy densities. Talking specifically, here are the details on density comparison on prismatic VS cylindrical cells: Prismatic Cells: Prismatic cells have a larger size, allowing them to contain more energy per cell compared to cylindrical cells. A single prismatic cell can hold the same amount of energy as 20 to 100 cylindrical cells[1]. This higher energy density makes prismatic cells suitable for energy-intensive applications. Cylindrical Cells: Cylindrical cells are smaller in size compared to prismatic cells. While they may store less energy per cell, they have a higher power output. Cylindrical cells can discharge their energy faster than prismatic cells due to having more connections per amp-hour[1]. This makes cylindrical cells ideal for high-performance applications 2. Longevity Prismatic Cells: Typically, a prismatic cell can sustain about 2,000 charge-discharge cycles[2] before its capacity begins to significantly degrade. However, the real advantage of prismatic cells becomes apparent when they are assembled

NEWS

SZJ Shines at The Battery Show Europe 2024

From June 18 to 20, 2024, The Battery Show Europe 2024, a globally anticipated event, grandly opened in Stuttgart, Germany. As a leading enterprise in the field of intelligent manufacturing of battery equipment, SZJ took this opportunity to showcase its latest innovations in battery equipment technology and product solutions, once again demonstrating its strong capabilities in the global battery manufacturing sector. Technological Exhibition, Showcases Strength At the exhibition, SZJ focused on a complete production line model for prismatic cells. This model fully displays the entire production process from material handling, cell manufacturing, and cell assembly to final testing. It not only highlights technological advantages in prismatic cell manufacturing but also allows visitors to intuitively experience meticulous craftsmanship.The booth attracted a large crowd, with industry experts and visitors stopping by to inquire, giving high praise to the technological innovations. Comprehensive Layout, Leading Technology in Multiple Fields In addition to the prismatic cells production line model, technological prowess in the production equipment for large cylindrical cells, small cylindrical cells, and pouch cells was equally impressive. Particularly noteworthy is the automated production line for large cylindrical cells, where SZJ has earned high recognition in the industry with its efficient grooving and laser sealing solutions, integrated with high-efficiency transmission, precise forming, and automatic welding technologies. This production line boasts a single-line capacity of up to 350 PPM with a yield rate exceeding 99.5%, showcasing the company’s leading position in the industry. Looking Ahead, Continuing to Forge Ahead SZJ’s continuous innovation and leading technology in the field of intelligent manufacturing of battery equipment not only provide strong support for the development of the global battery industry but also lay a solid foundation for the company’s future development. Looking ahead, SZJ will continue to increase investment in research and development, promote technological innovation and product upgrades, and contribute more

small cylindrical batteries
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Everything You Need to Know about Filling the Electrolyte for a Battery

Battery water or battery electrolyte is a crucial component when manufacturing a battery. It’s free from minerals and ensures the electrolyte in the battery maintains its desired purity and concentrations, contributing to its longevity. However, over time, the electrolyte for a battery may evaporate, requiring you to refill the battery’s electrolyte. To help you in this regard, we are going to discuss the composition of an electrolyte for a battery, its principles, and the factors that may affect the filling process. Let’s begin! Composition of Battery Electrolyte Lithium-ion battery is the carrier of ion transmission in the battery and is made of organic solvent and lithium salt. The composition of lithium-ion battery is given as: 1. Solvents Here’s one of the major organic solvents that can be used in lithium-ion batteries: Ethylene Carbonate.   It’s a colorless liquid that stays in white crystal form at room temperature and has a boiling point of 248℃/760mmHg[1]. It’s indispensable in lithium-ion batteries due to its ability to form stable SEI on graphitic anodes. However, Ethylene Carbonate[2] is solid at room temperature, and its combination with lithium salts results in a viscous solution. That’s why it’s used with other linear carbonates, such as DMC (dimethyl carbonate) and DEC (diethyl carbonate), which also enable low-temperature operation. 2. Lithium Salt Lithium Hexafluorophosphate is a typical lithium salt that’s part of the electrolyte for a battery (lithium-ion). It exhibits a white crystal or powder form, has a 2.84 g/cm3 density[3] and is easily soluble in water. It’s the top choice when it comes to electrolytes for batteries. The reason is that lithium hexafluorophosphate has high ionic conductivity and good electrochemical stability. The electrolyte for a battery also comprises some additional film-forming additives, flame retardant additives, and conductive additives. They control the content of H2O and HF in

green manufacturing
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How to Achieve Green Manufacturing in the Battery Production Process?

The sustainable battery production process has been gaining substantial attention recently. Because of the growing demand for EVs (electric vehicles) and renewable energy storage, more and more businesses are joining the competition of battery manufacturing to grasp the large opportunities. However, the expanding use of eco-friendly batteries is driven by their potential to reduce emissions and support clean energy. The whole process may involve significant environmental challenges. It may render resource extraction, high energy consumption, and waste production. This article outlines the current environment issue on battery manufacturing and the methods to achieve green manufacturing in battery production process. (Copyright Photo from: https://img.freepik.com/free-photo/wasteless-concept-with-blossoming-bouquet_23-2149696445.jpg?t=st=1717147622~exp=1717151222~hmac=9492c68bdbe83e5ae26eae7802cb51bffd162053a2aeac46b612f2c987e2c806&w=996) Current Manufacturing Status for Environmental Impact The demand for batteries is soaring to power everything from smartphones to electric vehicles. However, it would bring some environmental impact for various aspects:   1. Warm-House Gas Emission When Mining While sustainable batteries are highly significant in combating global warming, mining components used in battery production processes come with environmental concerns. Mining and mineral processing needed in the lithium battery production process contributes to 40% of the climate impact in the overall process[1]. And when digging the metal elements, machines would generate the warm house gases, which exaggerate the global warming. 2. Toxic Materials Utilization Data Center Knowledge[2] shows that some types of lithium-ion batteries integrate toxic materials that can contaminate the water supplies or ecosystem around the mine. In the battery manufacturing process, certain toxic materials, such as nickel, cobalt, and manganese, are often utilized due to their superior electrochemical properties. These materials enhance battery performance and provide reliable efficiency. But the use of these toxic substances carries significant environmental drawbacks. For example, lead and cadmium are highly toxic to humans and wildlife, posing serious health risks if they contaminate soil and water. The disposal of batteries containing these

many batteries
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FAQ about OCV Testing During Battery Inspection

Battery quality testing is key in assessing the cell’s operational performance and quality. OCV (Open Circuit Voltage) testing measures the battery voltage when it’s not connected to any load, and no current is flowing outside the cell. This non-intrusive test provides valuable insights into the battery’s state of charge and health. During battery inspection, people would be perplexed by some concepts and would face some issues. To complete handle that smoothly, you need to know the answers to these common questions about OCV testing. (Copyright Photo from: https://www.freepik.com/free-photo/high-view-battery-pollution-waste_11276189.htm#fromView=image_search_similar&page=2&position=26&uuid=9755bac4-4154-43d0-917b-336a7ba3d7aa) Q1: What is the Open Circuit? An open circuit refers to discontinuity in an electrical circuit because no current flows through it. It reflects the true potential difference between the terminals without being influenced by external factors. Q2: What is OCV Testing for Lithium-Ion Battery? For lithium-ion batteries, OCV testing involves determining the cell’s voltage in the resting stage when disconnected from the charge. This apparently simple test depicts the battery’s health, functionality, state of charge, and potential anomalies. These batteries exhibit self-discharge capabilities, which causes the OCV values to drop with time. When the lithium-ion battery has an internal fault, the self-discharge process increases. It causes open circuit voltage to decline beyond the defined limit. A cell with an OCV that is too low or too high indicates a cell quality concern. OCV testing also serves as an initial litmus test to detect defects, imbalances, or inconsistencies early on. It helps manufacturers rectify these issues and ensure that only batteries meeting the highest quality standards proceed. Q3: What are the Differences Between Nominal Battery Voltage and OCV? Here are some basic differences between nominal and OCV voltage types: Nominal Battery Voltage Nominal battery voltage is the standardized or average voltage of a battery under normal operating conditions. For example, the nominal

Factory with Solar Panel Production Line
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How Automated Assembly Line Fix the Manufacturing Flaws of Photovoltaic Solution

As the world progressively pivots towards sustainable energy sources, photovoltaic (PV) solutions have emerged as a cornerstone in the renewable energy sector. The significance of PV technology lies in its ability to harness the sun’s abundant energy and convert it into a clean, reliable, and renewable source of electricity. According to the IEA’s annual market report for 2023, global renewable energy capacity saw a growth of 50% compared to the previous year, with solar energy being a significant contributor to this growth[1]. With the global demand for solar energy systems escalating, the industry faces the dual challenge of increasing production volumes while maintaining high capacity and standards of quality. The flaws in manufacturing photovoltaic solutions often pose significant obstacles, hindering the efficiency and reliability of solar energy systems. From defects of cutting and slicing in panel coatings to sealing on solar batteries, these flaws can compromise the yields to meet the order and the performance of the photovoltaic solution. How to fix the intricacies of the photovoltaic manufacturing process? In today’s blog, we are going to examine the common flaws that can arise when manufacturing components in photovoltaic solutions and see how an automated assembly line can solve these challenges in photovoltaic solutions. (Copyright Photo from: https://freepik.com/free-photo/close-up-pv-cell-produced-manufacturing-warehouse-3d-illustration_145844076.htm#fromView=search&page=1&position=3&uuid=2134d878-7e4b-449e-8036-a60b47d12a9c) What Deflects Would Meet When Manufacturing the Components in Photovoltaic Solution? In the context of photovoltaic system manufacturing, several flaws brought by conventional manufacturing can arise during the production of key components, which can ultimately affect the efficiency and longevity of the systems. Let’s delve into some of these manufacturing challenges: When Manufacturing Silicon Wafers Cutting and Slicing: The traditional process of cutting silicon ingots into wafers can result in various defects, such as chipping, cracking, or surface damage. Achieving clean cuts without compromising the structural integrity of the wafers is crucial for