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

The global lithium battery landscape is undergoing changes, and the bankruptcy of Northvolt has triggered a chain reaction in the industry In 2025, Northvolt, Europe's largest battery manufacturer, filed for bankruptcy protection in the United States due to the rapid depletion of funds and the cancellation of orders by BMW. Northvolt was once regarded as the "hope of European lithium batteries" and received support from Volkswagen, Goldman Sachs and others. Its bankruptcy exposed problems such as slow technology transformation, weak cost control and weak market competition in the European lithium battery industry. This incident has triggered a chain reaction in the industry. On the one hand, it has created market space for Chinese lithium battery enterprises to expand overseas and accelerated the global lithium battery industry pattern to tilt towards China. On the other hand, it also warns global lithium battery enterprises that they need to strengthen the control of technology, cost and market risks, and reshape the competitive order of the international lithium battery industry.

Catl is deepening its European layout and advancing its global strategy through joint venture battery factories In 2025, CATL will continue to expand its overseas presence and deepen its cooperation with Stellantis to jointly build a battery factory in Spain. Each party will hold a 50% stake, with a total investment of 4.038 billion euros. The planned annual production capacity of batteries is 50GWh, and the construction period is four years. This is CATL's third lithium battery factory in Europe after those in Germany and Hungary. Relying on the advantages of "full-line delivery + intelligent solutions", it responds to the demands and policies of the European market and strengthens its global supply chain layout. This layout helps CATL consolidate its international market share and also reflects that Chinese lithium battery enterprises are accelerating their globalization, participating in international industrial collaboration and competition, and enhancing their say in the global lithium battery industry.

At the beginning of 2025, the lithium battery market was brimming with vitality, and the commercialization of solid-state batteries was accelerating At the beginning of 2025, the lithium battery market showed multiple positive signals. On the policy front, the domestic policy of trading in old cars for new ones has been intensified, stimulating the demand for new energy vehicles. It is estimated that by 2025, the sales of new energy vehicles in China will reach 16.1 million units, driving the growth of lithium battery demand. In terms of market demand, the production scheduling of the industrial chain increased significantly from January to February. The production scheduling of products such as batteries and lithium iron phosphate cathodes rose sharply year-on-year. Enterprises have a strong willingness to replenish inventories. The development of the new energy vehicle and energy storage industries is the main driving force. In the process of technological innovation, the commercialization of solid-state batteries is accelerating. Byd plans to start batch demonstration and installation of all-solid-state batteries in vehicles in 2027. Changan Automobile has released the "Golden Bell Jar" solid-state battery with an energy density of 400Wh/kg. Domestic equipment manufacturers have also launched all-solid-state complete line solutions. Although they face technical and cost challenges, mass production is expected, which will promote the upgrading of lithium battery material systems.

Breakthroughs and application expansions in solid-state battery technology are reshaping the competitive landscape of the industry In 2025, solid-state battery technology will continue to heat up. A domestic team from the Chinese Academy of Sciences has developed a 400-watt-hour per kilogram solid-state battery, with an energy density 30% higher than that of advanced lithium-ion batteries currently on the market. It is planned to exceed 600 watt-hours per kilogram within 1-2 years, enabling electric vehicles to travel over 1,000 kilometers after a 10-minute charge. Moreover, it has significantly improved in fast charging, low-temperature performance, and safety. Meanwhile, Qingtao Energy's 10-billion-yuan solid-state battery industrial base in Southwest China was launched, with a planned annual production capacity of 15GWh. Solid-state batteries have also achieved their first batch application in the field of robotics. The technology is gradually moving from the laboratory to industrialization, which is expected to break the existing lithium battery technology route pattern and drive the industry into a new competitive cycle. Global enterprises are accelerating their layout in the solid-state battery track to seize the future technological high ground.

Dao County signed an 8-billion-yuan lithium battery cell industrial chain project to facilitate regional industrial upgrading In June 2025, Dao County successfully signed the Kunyu lithium Battery cell industry chain investment Project, with an investment of 8 billion yuan, which is the largest investment attraction project signed by Yongzhou this year. It is reported that Kunyu Group, as a leading company in the lithium battery energy industry, has a global business layout. The implementation of this project will drive the development of the lithium battery industry in Dao County, improve the industrial chain ecosystem, introduce advanced production technologies and management experience to the local area, create job opportunities, accelerate the transformation of the regional economy towards the new energy track, and also demonstrate the development trend of regional coordination and gradient transfer in the domestic lithium battery industry.

In April 2025, the power battery industry saw significant growth, with leading enterprises competing in new tracks In April 2025, the sales volume of new energy vehicles in China reached 1.226 million units, increasing by 44.2% year-on-year. The installed capacity of power batteries was 54.1GWh, with a year-on-year increase of 52.8%. Catl and Honda China have upgraded their strategic cooperation, deepening collaboration in areas such as lithium iron phosphate batteries and CTB integration technology, and consolidating their technological and supply chain advantages. Byd, relying on its vertical integration model, installed 14.17GWh of power batteries in April, with a market share of 26.35%. Its market share of lithium iron phosphate batteries is approaching that of CATL, which has formed a synergy with the growth in sales of new energy vehicles. Guoxuan High-Tech's overseas vehicle installation volume in the first quarter increased by 108.2% year-on-year. In April, it ranked fourth in the industry with an installation volume of 3.14GWh. Sunwoda and others achieved growth by expanding their energy storage business. The overall sales volume of the energy storage sector increased by 75.5% year-on-year in that month. Industry leaders and second - and third-tier enterprises each sought breakthroughs, and the energy storage and overseas markets became the focus of competition.

The importance of lithium battery voltage in practical applicationsCompatibility with the deviceThe voltage of lithium batteries must match the voltage requirements of the electrical equipment to ensure its normal operation. If the battery voltage is too high, it may damage the electronic components of the device. If the voltage is too low, the equipment will not be able to obtain sufficient power to drive and will not be able to work normally. For instance, consumer electronic products such as mobile phones and tablet computers are usually designed to be compatible with 3.7V lithium-ion batteries. If batteries with mismatched voltages are used, it may lead to serious consequences such as the device failing to power on, screen flickering, or even burning out the motherboard. In the field of electric vehicles, the total voltage of the battery pack needs to match the voltage requirements of components such as the motor and the electronic control system to ensure the vehicle's power performance and safety. ​The role of the Battery Management System (BMS)To ensure that lithium batteries operate within a safe and efficient voltage range, the battery management system (BMS) plays a crucial role. BMS can monitor parameters such as voltage, current and temperature of the battery in real time. By precisely controlling the charging and discharging process, it prevents overcharging and overdischarging of the battery and protects its safety. For instance, when the battery voltage reaches the charging cut-off voltage, the BMS will automatically cut off the charging circuit to prevent the battery from being damaged due to overcharging. When the battery voltage drops to the discharge cut-off voltage, the BMS will limit the power consumption of the device or issue a low battery warning to remind the user to charge it in time. In addition, BMS can also adjust the voltage of each individual battery in the battery pack through the balance management function, ensuring the consistency of the battery pack and extending its service life. ​3. The impact on energy storage and release efficiencyThe voltage stability of lithium batteries directly affects their energy storage and release efficiency. In energy storage systems, a stable voltage output can ensure the efficient storage and release of electrical energy and reduce energy loss. If the battery voltage fluctuates greatly, it will not only reduce the overall efficiency of the energy storage system, but also may have an adverse impact on the stability of the power grid. For instance, in photovoltaic power generation energy storage systems, lithium batteries need to stably store the electrical energy generated by solar panels and output a stable voltage when needed, providing reliable power supply to users. Therefore, enhancing the voltage stability of lithium batteries is of great significance for improving the performance and economy of energy storage systems. ​

Factors affecting the voltage of lithium batteriesThe influence of electrode materialsThe selection and characteristics of positive and negative electrode materials play a decisive role in the voltage of lithium batteries. Different cathode materials have different REDOX potentials, which directly determine the nominal voltage and operating voltage range of the battery. For instance, the REDOX potential of lithium cobalt oxide is relatively high, which enables lithium batteries with it as the cathode material to have a relatively high nominal voltage. The REDOX potential of lithium iron phosphate is relatively low, so the nominal voltage of lithium iron phosphate batteries is also relatively low. Meanwhile, the performance of the anode material also affects the battery voltage. For instance, the potential change of the graphite anode during charging and discharging is relatively stable, which helps maintain a steady output of the battery voltage. ​2. The influence of charging and discharging statesThe voltage of lithium batteries changes significantly during the charging and discharging process. During the charging process, the battery voltage gradually rises. When it reaches the charging cut-off voltage, the battery is regarded as fully charged. During the discharge process, as the chemical energy inside the battery is continuously converted into electrical energy, the battery voltage gradually decreases. In addition, the magnitude of the charging and discharging current also has an impact on the voltage. Larger charging and discharging currents will intensify the polarization phenomenon inside the battery, causing the battery voltage to rise more rapidly during charging and drop more significantly during discharging, thereby affecting the actual available capacity and service life of the battery. ​The influence of temperature and agingThe ambient temperature has a non-negligible influence on the voltage of lithium batteries. In a low-temperature environment, the viscosity of the electrolyte inside the battery increases, and the ion transport resistance rises, resulting in an increase in the internal resistance of the battery, a significant drop in voltage, and a considerable reduction in the battery's discharge capacity. In high-temperature environments, although the initial voltage of the battery may increase slightly, the excessively high temperature will accelerate the chemical reactions inside the battery, leading to a faster aging process, reduced voltage stability, and even potential safety issues such as thermal runaway. As the number of battery uses increases, the electrode materials will gradually age, the active substances will decrease, and the internal resistance of the battery will increase. All these will lead to a drop in battery voltage and capacity attenuation, which is manifested as a gradual decrease in the battery's endurance.

Introduction to the Voltage Characteristics of Lithium-ion BatteriesLithium-ion batteries are currently the most widely used type of lithium battery, and their voltage characteristics vary due to the differences in cathode materials:Lithium cobalt oxide battery (LCO) : The nominal voltage is usually 3.7V. When the charging cut-off voltage reaches 4.2V, the battery is fully charged. When the discharge reaches approximately 2.75V, it is regarded as the termination of discharge. This type of battery has a relatively high energy density. However, due to the scarcity and high price of cobalt resources, as well as relatively poor safety, it is mainly applied in consumer electronic products such as mobile phones and laptops that have high requirements for volume and weight. ​Lithium manganate battery (LMO) : The nominal voltage is also approximately 3.7V, but its charging and discharging voltage window is relatively narrow, and its stability in high-temperature environments is not as good as that of batteries made of other materials. However, lithium manganate batteries have a relatively low cost and good high-current discharge performance, and are often used in fields such as electric bicycles and power tools. ​Lithium nickel cobalt manganese oxide (NCM) batteries and lithium nickel cobalt aluminum oxide (NCA) batteries: These two types of batteries also belong to the ternary lithium battery system, and their nominal voltages are generally between 3.6 and 3.7V. Among them, NCM811 and NCA batteries with high nickel content, by optimizing material formulas and processes, not only enhance energy density but also maintain relatively stable voltage output. They are widely used in the field of electric vehicles, providing vehicles with longer driving ranges and stable power output. ​Lithium iron phosphate battery (LFP) : The nominal voltage is 3.2V. Compared with ternary lithium batteries, its charging cut-off voltage is 3.65V and the discharging cut-off voltage is 2.0V. Lithium iron phosphate batteries have the advantages of high safety, long cycle life and low cost, but their energy density is relatively low. In recent years, with the continuous advancement of technology, its application in fields such as electric vehicles and energy storage systems has become increasingly widespread.

Portable energy storage lithium battery VSUPS uninterruptible power supplyPortable energy storage lithium batteryThis product was developed to address the urgent power shortage. It can supply power independently from the power grid, efficiently utilize solar energy for power generation, and store electricity in large capacity with lithium batteries. After that, it can be converted into various AC and DC electricity to supply power for People's Daily appliances, such as lighting, cooking, boiling water, brewing tea, computers, printers, telephone communication, and so on. It is because of its portability that it can be easily carried around both at home and in the office, ensuring the normal operation of life and work.UPS uninterruptible power supplyThis type of power supply emerged relatively early and is the earliest product among the five types of power supplies, coming into being along with the rise of computers. Back then, ups power supplies used lead-acid batteries. Nowadays, there are also lithium battery products available. The purpose of this type of product is to ensure that the computer can still be powered for a short period of time when it suddenly runs out of power, and to guarantee the normal storage of data during this period. Usually, the battery life is around 20 minutes. The battery capacity is very small, but it does not pursue lightness or portability. Computers usually use the power grid. The ups power supply only starts to operate when the power grid is off, and its operation time is very short, within milliseconds (ms). When the computer switches from the power grid to the UPS uninterruptible power supply, it is not easy to shut down, ensuring that data is not easily lost.