China Tianjin Liwei New Energy Technology Co., Ltd. Company News

An introduction to the energy density of lithium batteriesEnergy density, simply put, refers to the amount of energy stored within a certain space or mass range. For lithium batteries, their energy density specifically refers to the average amount of electrical energy that the battery can release per unit volume or mass. This indicator visually reflects the efficiency of the battery's energy storage and is a key element in evaluating the performance of the battery.The impact on the battery life of the equipmentAmong various devices that use lithium batteries, battery life is one of the performance aspects that users care about the most. Take electric vehicles as an example. The energy density of the battery directly determines the distance that the vehicle can travel after a single charge. If the battery energy density is low and the vehicle's driving range is limited, frequent charging is required. This not only brings inconvenience to users but also restricts the popularization and promotion of electric vehicles. High-energy-density lithium batteries can store more electrical energy, significantly increasing the driving range of electric vehicles. For instance, some models of Tesla, with their high-energy-density batteries, have a driving range of up to hundreds of kilometers, effectively alleviating users' "range anxiety". Similarly, in portable electronic devices such as mobile phones and tablets, a higher energy density means that batteries can provide longer power support in a smaller volume or weight, reducing users' concerns about insufficient battery power and enhancing the user experience.The key role in different application scenariosIn the field of consumer electronics, with people's pursuit of thinning and high performance of electronic products, the energy density of lithium batteries has become an important factor restricting product design and functional realization. For instance, ultra-thin laptops, wearable devices and the like need to integrate more functions within a limited space. This requires batteries to have a higher energy density so as to meet the long-term operation needs of the devices without increasing their volume and weight. In the aerospace field, due to the extremely strict requirements for the weight of aircraft, high-energy-density lithium batteries can not only reduce the weight of aircraft but also ensure reliable power supply for their key equipment, providing strong support for the development of aerospace technology. In large-scale energy storage systems, lithium batteries with high energy density can store more electrical energy within a limited space, enhancing the efficiency and economy of the energy storage system. This is of great significance for balancing the supply and demand of the power grid and promoting the consumption of renewable energy.

Introduction to the correct charging method of lithium batteriesThe following is the correct way to charge lithium batteries to help extend battery life and ensure safety:I. Key Points for Daily ChargingAvoid overcharging and overdischargingNot fully charged to 100% : Lithium batteries do not need to be charged to 100% each time. It is recommended to charge them to 80%-90% (some devices support the "optimized charging" function, which can be enabled to reduce battery wear and tear).Do not drain the battery: Try to charge when the battery is remaining at 20%-30%, and avoid over-discharging (discharging below 5% May damage the battery).Use the original chargerGive priority to using the charger that comes with the device or a certified third-party charger to avoid unstable voltage, overheating or potential safety hazards caused by inferior chargers.The charging environment is suitable.Temperature: Avoid charging in high-temperature environments (such as direct sunlight inside the car) or low-temperature conditions. The ideal temperature is around 25℃ (high temperatures can accelerate battery aging, while low temperatures may cause charging to slow down or temporarily stop working).Ventilation: Ensure good heat dissipation of the device during charging and keep it away from flammable materials such as bedding and clothing.Second, optimize charging habitsCharge it as needed without the need for deliberate cycle chargingLithium batteries have no "memory effect" and do not require a complete charge and discharge cycle. They can be charged at any time, and maintaining their charge within the range of 30% to 80% is more conducive to extending their lifespan.Avoid long-term storage with full chargeIf the device needs to be stored for a long time (such as more than one month), it is recommended to charge it to 50%-60% and then turn it off. Recharge the battery every three months (storing it fully charged will accelerate the battery's self-discharge and aging).Reduce the use while chargingPlaying large-scale games or running high-power applications while charging can cause the battery to heat up and accelerate its wear and tear. If you need to use it, try to choose a scene with low brightness and few background tasks.Iii. Precautions for Special ScenariosMobile phone/laptopTurn off power-consuming functions such as "Background Application Refresh" and "Location Service" to reduce the load during charging.When a laptop is plugged in for a long time, you can activate the "Battery Protection Mode" to limit the charging to around 80%.Electric vehicle/energy storage batteryAvoid charging when the battery temperature is too high (such as right after riding) or too low. Wait for 30 minutes before charging to cool or warm up.Regularly check whether the battery interface is loose or oxidized to ensure good charging contact.Safety firstIf you notice the battery bulging, abnormal heating, smoke coming out of the charging port or an unpleasant smell, stop using it immediately and contact a professional for handling. Do not continue charging or disassemble it by yourself.Iv. Other suggestions for Extending Battery LifeRegularly clean up background programs: Reduce unnecessary power consumption of applications and lower the charging frequency.Avoid frequent fast charging: Although fast charging is convenient, long-term use may accelerate battery degradation. In daily life, you can alternate between regular charging.Update system/firmware: The manufacturer may optimize the battery management logic through updates. It is recommended to upgrade in a timely manner.By adopting reasonable charging habits, the cycle life of lithium batteries (typically 300 to 500 complete charge and discharge cycles) can be significantly extended, maintaining stable battery life for the device.

The application landscape of lithium batteries: Reshaping the diverse scenarios of energy usage From the smartphones in our pockets to the electric vehicles that run freely, lithium batteries are reshaping the way humans use energy. In the field of consumer electronics, it promotes the development of devices towards ultra-thinness and long battery life. Behind the popularization of foldable screen phones and VR devices, the technical support of lithium batteries is indispensable. In the field of new energy vehicles, CATL's Qilin battery, with an energy density of 255Wh/kg, has helped electric vehicles exceed 1,000 kilometers in range, accelerating the replacement process of fuel vehicles. In the field of energy storage, lithium battery energy storage power stations convert unstable wind and photovoltaic power into stable electricity through "peak shaving and valley filling", ensuring the safety of the power grid. In the aerospace field, lightweight lithium batteries provide continuous power for satellites for up to 15 years. In the military field, individual soldier equipment, unmanned aerial vehicles, etc. have also achieved a leap in mobility and endurance due to lithium batteries. The expansion of these application scenarios indicates that lithium batteries have become the core driving force for the energy transition.

Lithium Battery Safety Hazards and Protection: A Game of Technology and Risk The energy density advantage and safety risks of lithium batteries are like two sides of the same coin. When a battery undergoes overcharging, lithium ions are overly embedded in the negative electrode, which can trigger the growth of lithium dendrites, piercing the separator and causing a short circuit. Under high-temperature conditions, the side reactions between the electrolyte and electrode materials intensify, generating a large amount of gas and heat. If heat dissipation is not timely, thermal runaway will occur. The lithium battery fire incident of the Boeing 787 passenger aircraft in 2019 is a typical case of a chain reaction caused by a malfunction in the cooling system. To mitigate risks, the industry has established multiple protection systems: at the hardware level, protection circuits monitor voltage and current in real time and instantly cut off the circuit in case of abnormalities; In terms of material innovation, solid electrolytes replace organic electrolytes, eliminating the risk of flammability from the root. In the structural design, components such as explosion-proof valves and heat dissipation channels form a "safety net". In addition, it is equally crucial for users to use them in a standardized manner (such as avoiding high temperatures and direct sunlight, and using the original factory charger). Only by taking both technical measures and usage norms into account can the safe operation of lithium batteries be ensured.

The outstanding performance of lithium batteries: Why They have Become the "darlings" of Modern Energy In the arena of energy technology, lithium batteries have stood out with multiple core advantages. With an energy density of up to 200-300 Wh/kg, it is several times higher than that of traditional lead-acid batteries, enabling mobile phones and electric vehicles to achieve lightweight design. The extremely low self-discharge rate (about 5-10% per month) enables the backup power supply to remain on standby for a long time. In terms of cycle life, mainstream lithium batteries can still retain over 80% of their capacity after 1,000 charge and discharge cycles, far exceeding the performance of nickel-metal-hydride batteries. What is more worth mentioning is that the working voltage of lithium batteries at 3.7V is three times that of nickel-cadmium batteries, simplifying the circuit design. The feature of no memory effect has completely changed users' usage habits. There is no need to deliberately "drain the battery"; charging at any time can maintain the best performance. These outstanding performances make it an irreplaceable energy choice in fields such as consumer electronics and new energy vehicles.

Deconstructing Lithium Batteries: The Composition of Energy Carriers from a Microscopic Perspective Unveiling the "mysterious veil" of lithium batteries, their exquisite internal structure can be regarded as a masterpiece of engineering. Cathode materials, as the "source" of lithium ions, are typically composed of lithium metal oxides or phosphates, such as ternary materials (lithium nickel cobalt manganese oxide), which achieve high energy density output through the synergistic effect of different metal elements. The anode materials mostly adopt carbon-based substances such as graphite, whose layered structure is like a "honeycomb", providing a large amount of storage space for lithium ions. The separator between the positive and negative electrodes builds a safety barrier with nanoscale pores, which not only isolates electrons to prevent short circuits but also allows lithium ions to travel freely. Organic electrolytes, on the other hand, play the role of "ion highways", forming conductive ion currents by dissolving lithium salts. The packaging shell not only provides mechanical protection but also prevents moisture and oxygen from entering through sealing technology. These components work together like a precise symphony orchestra, jointly playing the symphony of energy transmission.

Exploring the Working Principle of Lithium Batteries: The "Migration Journey" of Lithium Ions As an indispensable energy carrier in modern society, the core mystery of lithium batteries lies in the directional movement of lithium ions. During charging, lithium ions in the positive electrode material "fly away" from the lattice like migratory birds and, driven by the electric field force, pass through the electrolyte and intercalate into the layered structure of the negative electrode. During this process, electrons synchronously reach the negative electrode through the external circuit, completing the charge balance. Take lithium iron phosphate batteries as an example. During charging, lithium ions in the lithium iron phosphate lattice are released and transformed into lithium iron phosphate. However, during discharging, lithium ions migrate in the reverse direction and recombine with lithium iron phosphate to form lithium iron phosphate. Electrons, through the work done by the load, efficiently convert chemical energy into electrical energy. This reversible process based on REDOX reactions forms the basis of the cycle charging and discharging of lithium batteries. Its unique "rocking chair" working mechanism enables the storage and release of energy to be like a precisely choreographed dance, providing stable power for various devices.

The market for car emergency starting power supplies is highly competitive, with several leading brands vying for consumers' attention. Let's take a closer look at some of the top players and what they have to offer.​ Brand A is known for its high - quality lithium - ion power supplies. Their products are compact, lightweight, and offer a high power output. They come with a range of safety features, including over - charge protection and short - circuit protection. In addition, Brand A's power supplies are equipped with fast - charging technology, allowing you to recharge the device quickly.​ Brand B specializes in lead - acid power supplies. Their products are more robust and can deliver high - current pulses, making them ideal for starting large engines. Brand B's power supplies also come with additional features, such as built - in flashlights and USB ports. They are known for their durability and long lifespan.​ Brand C offers a unique combination of lithium - ion and lead - acid technology. Their power supplies are designed to provide the best of both worlds: high energy density and high - current output. Brand C's products are also equipped with advanced safety features and a user - friendly interface.​ Each of these brands has its own strengths and weaknesses, and the best choice for you will depend on your specific needs and preferences. Whether you're looking for a lightweight and portable power supply or a high - performance device for starting large engines, there's a brand out there that can meet your requirements.

With a plethora of car emergency starting power supplies available on the market, choosing the right one can be a daunting task. However, by considering a few key factors, you can make an informed decision.​ First and foremost, consider the power output of the device. The power output is measured in amperes (A) or cold - cranking amperes (CCA). For most passenger cars, a power supply with a CCA rating of 200 - 400A should be sufficient. However, if you own a large truck or SUV with a powerful engine, you may need a power supply with a higher CCA rating.​ Battery capacity is another important factor to consider. The capacity is measured in milliampere - hours (mAh) or watt - hours (Wh). A higher capacity means the power supply can store more energy, allowing you to start your vehicle multiple times or charge other devices for longer periods.​ Portability is also a crucial consideration. If you plan to carry the power supply with you on a regular basis, look for a lightweight and compact model. Some power supplies are small enough to fit in your pocket, while others are larger and more suitable for storing in the trunk.​ Safety features are non - negotiable. Make sure the power supply you choose has built - in protection against over - charging, short - circuiting, and reverse - polarity. These features can prevent damage to your vehicle and the power supply itself.​ Finally, consider the brand and reputation of the manufacturer. Look for brands that have a proven track record of producing high - quality products and providing excellent customer service. Reading online reviews and testimonials can also help you get an idea of the product's performance and reliability.​ By taking these factors into account, you can find a car emergency starting power supply that meets your needs and provides reliable performance.

To truly appreciate the value of a car emergency starting power supply, it’s essential to understand its inner workings. At the heart of these devices lies a rechargeable battery, typically a lithium - ion or lead - acid battery.​ Lithium - ion batteries are known for their high energy density, lightweight design, and long lifespan. They can store a large amount of energy in a relatively small package, making them ideal for portable applications. Lead - acid batteries, on the other hand, are more robust and can deliver high - current pulses, making them suitable for starting engines.​ The power supply also features a control circuit that regulates the charging and discharging process. This circuit ensures that the battery is charged safely and efficiently, preventing over - charging and over - discharging, which can damage the battery.​ When it comes to starting a vehicle, the power supply uses a set of cables to connect to the car's battery. The control circuit then activates the power supply, sending a high - current pulse to the car's starter motor. This provides the necessary energy to crank the engine and start the vehicle.​ In addition, many car emergency starting power supplies are equipped with a display panel that shows the battery's charge level, output voltage, and other important information. This allows users to monitor the device's performance and ensure that it’s in good working condition.​ Understanding the technology behind car emergency starting power supplies not only helps you make an informed purchase decision but also enables you to use the device more effectively.