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There are three types of integrated technology for the power battery of new energy vehicles: CTP, CTC, and CTB. Here are the introductions of these three technologies: CTP (Cell to Pack) technology. This mainly involves eliminating the battery module design and integrating the battery pack directly as a part of the vehicle structure onto the vehicle floor, thereby improving space utilization, reducing weight, and increasing endurance. CTC (Cell to Chassis) technology. This involves integrating the battery cells directly into the car chassis to achieve a higher degree of integration of the body and chassis. This technology further improves integration, reduces the number of components, improves space utilization, enhances structural efficiency, reduces vehicle weight, and increases driving range. CTB (Cell to Body) technology. This is a new battery integration technology proposed by BYD Auto, which achieves the evolution from body-in-white to battery-in-body. When designing and manufacturing the battery pack, the battery system is integrated as a whole with the body, at this point, the blade battery acts not only as a battery but also assumes some of the role of the chassis. With the continuous development of science and technology, the integrated technology of new energy vehicles' power battery is also developing. These integrated technologies aim at improving vehicle energy efficiency and increasing mileage while reducing production costs and improving production efficiency. 

  The current collector is one of the indispensable components of lithium-ion batteries, which can not only carry the active material, but also converge and output the current generated by the electrode active material, which is conducive to lowering the internal resistance of lithium-ion batteries, and improving the battery's Coulombic efficiency, cycling stability, and multiplier performance.   Lithium-ion battery current collector   In principle, the ideal lithium-ion battery fluid collector should meet the following conditions: (1) high conductivity; (2) good chemical and electrochemical stability; (3) high mechanical strength; (4) good compatibility and bonding with the electrode active substance; (5) cheap and easy to obtain; (6) light weight.   Currently, the materials that can be used as lithium-ion battery collectors include metal conductor materials such as copper, aluminum, nickel and stainless steel, semiconductor materials such as carbon, and composite materials.   2.1 Copper collector Copper is an excellent metal conductor with electrical conductivity second only to silver, and has many advantages such as abundant resources, cheap and easy to obtain, and good ductility. However, considering that copper is easy to be oxidized at higher potentials, it is often used as a collector for negatively active substances such as graphite, silicon, tin and cobalt-tin alloys. Common copper collectors include copper foils, copper foam and copper mesh, and three-dimensional copper nano-array collectors.   2.2 Aluminum Collector Although the conductivity of the metal aluminum is lower than that of copper, the mass of the aluminum wire is only half that of the copper wire when delivering the same amount of power, and there is no doubt that the use of an aluminum collector contributes to an increase in the energy density of lithium-ion batteries. In addition, compared with copper, aluminum is more affordable. During the charging/discharging process of lithium-ion batteries, a dense oxide film is formed on the surface of the aluminum foil collector, which improves the corrosion resistance of the aluminum foil, and it is often used as the collector for the positive electrode in lithium-ion batteries.   2.3 Nickel collector Comparatively speaking, nickel is a base metal, relatively inexpensive, has good electrical conductivity, and is more stable in acid and alkaline solutions, so nickel can be used as both positive and negative electrode collectors. It is matched with both positive active substances such as lithium iron phosphate and negative active substances such as nickel oxide, sulfur and carbon and silicon composites. The shape of nickel collector is usually of two types: nickel foam and nickel foil.   2.4 Stainless steel collector Stainless steel is an alloy steel containing elements such as nickel, molybdenum, titanium, niobium, copper, iron, etc. It has good electrical conductivity and stability, and it c...

To Our Valued Business Associates, Clients and Friends, Mid-Autumn Festival and National Day holiday is coming, Please accept our best wishes: May the Mid-Autumn Festival bring you and your family abundant blessings and prosperity, filled with happy moments and cherished memories. We will have Mid-Autumn Festival and National Day holiday from September 29th to October 6th 2023. Emergency Contact: Tel : +86-18120715609 Email : tob.amy@tobmachine.com

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Battery charging and discharging once is called a cycle, cycle life is an important indicator of the battery life performance. Factors affecting the cycle life of lithium-ion batteries inherent in the root cause, is to participate in the energy transfer of lithium ions in the number of decreasing. The total amount of lithium in the battery does not decrease, but the "activated" lithium ions are less, they are confined in certain places or the transmission channel is blocked, and can not freely participate in the charging and discharging process. Specifically: (1) Precipitation of lithium metal (2) Decomposition of cathode material (3) SEI film on the electrode surface: carbon anode material, during the initial cycle, the electrolyte will form a solid electrolyte (SEI) film on the electrode surface, and the formation process of SEI film will consume lithium ions. (4) Loss of electrolyte (5) Diaphragm blockage or damage (6) Dislodging of cathode and anode electrode materials  Email : tob.amy@tobmachine.com  Skype : amywangbest86  Whatsapp/Phone number : +86 181 2071 5609

Common Problems and Solutions for Binder  (PVDF, SBR, CMC, PAA, etc.) What about slurry settlement? Reason: l  The selected CMC type is not applicable, and the degree of substitution and molecular weight of CMC will affect the stability of the slurry to a certain extent, such as poor hydrophilicity of CMC with low substitution, good wettability to graphite, but poor suspension capacity of slurry; l  The amount of CMC is small, and the slurry cannot be effectively suspended; l  Too much CMC is involved in the kneading process, resulting in insufficient CMC free between particles and in suspension, which often leads to poor slurry stability; l  High mechanical forces and fluctuations in the acidity or alkalinity of the slurry can lead to breakage of the SBR, which can cause the slurry to settle; Solutions: l  Change or match CMC with high substitution degree and high molecular weight, for example, match WSC with CMC2200 in mass production formula, WSC itself has low molecular weight and low substitution degree, good wetting of graphite and weak suspending ability, after matching with CMC2200, the stability of the slurry has been greatly improved; l  Increasing the amount of CMC is one of the most effective means of improving paste stability, but it is important to find a balance between process capability and the low temperature performance of the cell; l  Reducing the amount of CMC used in kneading and increasing the amount of free CMC can improve the stability of the paste to a certain extent; l  After SBR is added to the slurry system, the stirring speed of the rotation should be reduced; What should I do if the hole is blocked during filtration and cannot be filtered? Reason: l  poor wetting of the active substance, no dispersion; l  Failure to filter due to SBR emulsion breakage; Solution: l  Using kneading process; l  After SBR is added to the slurry system, the stirring speed of the rotation should be reduced to prevent the occurrence of demulsification; What should I do if there is gel in the slurry? Reason: Gel production is mainly divided into two types, one is a physical gel and the other is a chemical gel. l  Physical gel: Cathode active materials, SP, solvent NMP have absorbed water, or the water content in the environment exceeds the standard, which is easy to form physical gels.This is because the polymer chain of PVDF is wrapped around the particles, and when the content of the slurry exceeds the standard, the polymer chain movement is blocked, and the polymer chains are entangled with each other, which reduces the fluidity of the slurry and the gel phenomenon occurs. l  Chemical gels: Chemical gels are prone to occur in the process of preparing high nickel or highly basic active materials or in stationary processes.This is because PVDF in the high pH environment of the base (as shown in the figure below), the polymer backbone is easy to de-HF to form double ...