1 Select safe and reliable positive electrode materials, large -capacity, high -ratio energy density batteries, and pay more attention to safety design; you can choose modified positive and negative pole materials to improve lithium battery safety; as we choose lithium iron phosphate positive poles.

2 CB value, cell balance coefficient (Cell Balance), one of the designs of lithium battery, that is, the positive and negative polar capacity ratio; a reasonable CB value to prevent the lithium battery cycle from analyzing lithium or abuse of over -charging process caused by lithium caused Lithium battery is hot and out of control; in general, the more negative electrodes are excessive, the better the safety performance. Generally, the excessive negative coefficient of the consumer battery is generally 1%-3%; and the negative electrode coefficient of our battery cells reaches 15-20%. The negative excess coefficient is more than 5 times that of consumer batteries.

3 Choose a separate diaphragm with good safety performance, PE ceramic diaphragm or PP/PE/PP diaphragm has a high broken membrane temperature and a lower closing temperature; you can also choose a thicker diaphragm to effectively reduce the heat out of control of the lithium battery Risk; Consumer batteries are generally 10-16 μm. While using high-performance diaphragm, we also use 20 μm thick diaphragm, which is a choice of conscience.

4 The electrolyte solvents are flammable and explosive, choose a high flash point electrolyte formula; choose the appropriate electrolyte additive to improve the flame retardant and anti -charging of the electrolyte; The application of our battery cells has developed electrolytes suitable for our battery cells with manufacturers, and the performance and safety of the battery cells are more guaranteed.

5 Choose a safe and reasonable designs of lithium battery structure, such as avoiding direct contact between the positive pole flow inside the lithium battery in the lithium battery; the risk of misplaced the lithium battery aluminum metal shell is reduced during the stack structure; When the corrosive shell leaks liquid, etc.; In order to save costs, we change the diaphragm exceeding the negative electrode, and the negative pole beyond the width of the positive electrode to 2mm, for safety, we always insist on designing, the diaphragm exceeds the negative electrode, and the negative electrode exceeds the positive pole with the positive pole. The width is designed to be 5mm.

6 Strictly control metal impurities, dust, burrs, etc. during the manufacturing process of lithium battery, reducing the risk of short circuit in lithium battery.

7 During the design of the lithium battery, it is necessary to design a safety explosion -proof function and design explosion -proceed valve. In addition When you think it is useful, the explosion-proceed valve is likely to be showing a show --- when we develop the Benchmark group to test the peer cells, many manufacturers are often used as the charging test. Breaking, explosion -proof valves are indifferent, and explosion -proof valves have not played any role after the battery test. The stress standard of our cover explosion valve is set at about 0.6MPa, and the welding intensity of the shell cover welding must exceed 0.8MPa to ensure that the explosion -proceed valve can really work.