行业知识

The power battery is composed of countless single cells according to a certain number and requirements, and finally forms a complete battery pack, so the smallest unit of the power battery of a single battery. So how is the battery pack specifically composed of batteries? Specifically, a battery module is composed of several battery cells assembled and welded in parallel, which is a PACK module; communicate with one battery cell; The vehicle power supply usually exceeds 300V, 200A. The current basic method is to

When it comes to pure electric vehicles, the biggest problem is probably the cruising range. Friends who drive new energy electric vehicles in the north know that the cruising range will be greatly reduced in winter. As a result, they did not dare to turn on the air conditioner for heating, so they could only endure the severe cold and shiver in the compartment. It directly leads to the extremely poor experience of new energy vehicles. To solve this problem, we have to rely on the battery management system. Today,

Fast charging at C/2 rate, and then discharging at C/10 rate can not only solve the lithium dendrite problem caused by rapid formation, but also reduce the formation time and cost; Traditional long-term slow formation will lead to greater impedance rise and lower capacity retention. So far, most lithium-ion batteries still rely on intercalated graphite materials as the anode, and during the first charge of the battery, electrolyte decomposition occurs on the graphite anode to form a solid electrolyte interpha

Three technologies to improve the voltage performance of cathode materials for lithium-ion batteries Increasing the voltage of the positive electrode data of lithium-ion batteries is a new idea to improve the energy density of lithium-ion batteries in recent years. The high-voltage data include two kinds of cathode data: spinel-like crystal structure and olivine-like crystal structure. LiMPO4(M=Co,Ni) is a typical high-pressure olivine crystal structure. Among them, the discharge potential of LiCoPO4 is 4.8v, th

Li-ion battery opportunities and challenges Opportunity 1: Low-carbon and environmental protection, the global wave of vehicle electrification is irreversible Driven by factors such as low-carbon environmental protection, power safety, and industrial support, the global electric vehicle market has developed rapidly. As of the end of 2017, the market share exceeded 3.4 million vehicles, with a market share exceeding 1%, and the annual compound addition rate reached 58%. The electrification trend of automobiles

Lithium-ion battery packs are generally composed of multiple batteries connected in series, but if the capacity of the batteries does not match, the capacity of the entire battery pack will be affected. To do this, we balance the mismatched cells. This article discusses the concept of cell balancing and some considerations. A lithium-ion battery pack usually consists of one or several battery packs connected in parallel, and each battery pack consists of 3 to 4 batteries connected in series. This combination can

Use a pen to power the power supply or power supply from the DC/DC boost circuit Add a starting circuit based on the original DC/DC Portable products generally use battery power supply, and because of the consideration of cost and volume, there is a tendency to reduce the number of batteries and volume in design. If the number of batteries is reduced, it will cause the power supply voltage to be lower than the working voltage required by the equipment. At this time, the DC/DC boost circuit is used. In additio

In terms of positive material materials, domestic companies are in the upperisement, both technology and scale, and future development prospects are expected; in terms of negative electrode materials, domestic companies have a comprehensive leading advantage. The electrolyte is controlled by foreign companies because of patents and core additives, and the formula is subject to the client. Domestic electrolyte manufacturers have actually become substitutes. In terms of diaphragm, domestic companies have made thei

The performance of lithium -ion battery positive materials directly affects the performance of lithium -ion batteries, and its cost also directly determines the cost of battery costs. There are many industrialized production processes in the positive electrode materials, and the synthesis routes are relatively complicated, and the control of temperature, environment, and impurities is also strict. There are many industrialized production processes in the positive electrode materials, and the synthetic routes are re