Lithium Battery Customization
Lithium battery customization allows for the creation of packs that meet energy needs exactly. Customized packs are compact, allowing for a more streamlined and efficient energy solution.
Customized lithium battery design ensures that the pack has enough capacity to support your equipment’s peak current and frequent charge-discharge cycles. It also helps optimize the cell structure and management system for a better power output and cycle life.
Design
Lithium batteries are complex and require careful design to Lithium battery customization ensure safe operation. This involves the use of a battery management system (BMS) to monitor cell voltage during charge and discharge. The BMS also controls the cooling of the lithium cells and prevents them from overheating. In addition, it has built-in safety features that shut off charging and discharging if the battery experiences over-current, over-voltage, under-voltage, or over-temperature conditions.
The basic battery structure consists of an anode, cathode, separator, and electrolyte. The electrolyte carries positively charged lithium ions from the anode to the cathode and vice versa through the separator. The movement of the ions creates free electrons that flow to the device being powered by the battery. This electrical energy is stored chemically in the battery as a charge, with some loss due to coulombic efficiency.
A critical design consideration is the choice of anode and cathode materials. Each offers unique advantages over the other. The anode material must be able to accommodate lithium ions and tolerate the insertion and extraction of the ions during cycling. In addition, the anode must be able to withstand high temperatures and mechanical damage.
EG Solar is a leader in lithium battery design and offers an end-to-end service from conceptualization to making it ready for manufacture. Using an advanced simulation-driven approach, we optimize the design of battery units and make sure that it is compatible with your specific requirements.
Cells
The battery cell is the heart of a lithium battery. It is what determines the capacity, voltage and other electrical parameters of the system. It also affects the thermal dissipation, manufacturing phase and end-of-life processing. Therefore, it is important to define a battery design scheme that meets the requirements of your specific project.
A good lithium battery requires a high-performance electrolyte to enable ionic transport and promote the lithium ions’ insertion between the cathode and anode materials. OneCharge uses an advanced non-aqueous LiPF6 electrolyte that has been engineered to optimize performance and longevity, with a high purity and low water content.
The anode material is selected for its ability to reversibly intercalate lithium ions at a low voltage, with only modest volume expansion. Graphite is the most common anode material, with excellent performance, but other materials such as LiTiO2 and NaCrO2 can offer higher energy density.
The separator is a porous membrane or nonwoven film that prevents physical contact between the anode and cathode, while enabling free ionic transport. The morphology of the separator is critical to maintaining high conductivity and preventing internal shorts.
BMS
A BMS is a critical part of ensuring lithium batteries operate safely, reliably, and efficiently in a variety of applications. It is designed to regulate charging and discharging, prevent the voltage, temperature, and current of individual cells from exceeding defined State-of-Assembly (SoA) limits during operation, and protect the battery pack against conditions that could threaten functional safety or cause damage.
These include overcharging, deep discharging, short circuits, and excessive cell temperature. The BMS will automatically trigger protective actions to counteract these conditions. For example, if a battery cell reaches its maximum charge, the BMS will disconnect the charging circuit or direct excess current to another cell to reduce the total voltage of the battery pack.
BMS systems also perform several other key functions, including reporting data and controlling the battery’s environment. They can communicate with other systems in an electric vehicle to relay information on the battery’s state of charge and other operating circumstances. They can also monitor a battery’s internal temperature, adjusting operations accordingly to maximize performance and longevity. Additionally, a BMS can help cool bike battery the battery by leveraging various power electronics to transfer thermal energy from one area of the pack to another. This can significantly reduce performance loss from thermal runaway. BMS designers often leverage tricks of the trade to accomplish this, using a combination of passive and active balancing strategies.
Shell
Lithium batteries are powering the lives of millions of people each day, from laptops and cell phones to hybrids and electric cars. They also have huge potential for grid-scale energy storage, as well as military and aerospace applications.
But these benefits are overshadowed by the fear of battery failures. Cellphones have caught fire on airplanes, and Tesla batteries have even exploded. Lithium batteries have an excellent safety record, but there are several factors that can impact their reliability and lifespan.
The most important is the lithium chemistry. LiFePO4 has an extremely stable chemical structure, and is not prone to thermal runaway like other lithium battery chemistries. This means that it will not overheat or ignite under harsh conditions, and will have an exceptionally long cycle life.
Another important factor is the electrolyte. It is a non-aqueous solution, and is usually made of ethylene carbonate and propylene carbonate. It is designed to exclude water, as it reacts violently with lithium hydroxide and hydrogen gas.
Finally, the physical dimensions of the battery are also important. It is possible to produce batteries in a wide range of shapes and sizes, as long as they can accommodate the appropriate number of cells. For example, a battery in the shape of a credit card could be produced, but it would need to be very thin to fit.