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Important application of energy storage connector products in lithium battery

Important application of energy storage connector products in lithium battery

(Summary description)At present, in the field of energy storage, the application and development of lithium batteries are very sensitive. Lithium battery energy storage has the advantages of high energy density, long service life and green environmental protection. However, it also has some disadvantages, such as high production cost, poor safety function and the risk of explosion. Therefore, the safety planning of heat treatment system is very important for the application of lithium batteries, As an indispensable element in series and parallel between battery packs, the temperature rise effect of energy storage coupler has a great impact on the whole lithium battery energy storage system. Therefore, low temperature rise planning has become an inevitable trend in the development of energy storage coupler.

Important application of energy storage connector products in lithium battery

(Summary description)At present, in the field of energy storage, the application and development of lithium batteries are very sensitive. Lithium battery energy storage has the advantages of high energy density, long service life and green environmental protection. However, it also has some disadvantages, such as high production cost, poor safety function and the risk of explosion. Therefore, the safety planning of heat treatment system is very important for the application of lithium batteries, As an indispensable element in series and parallel between battery packs, the temperature rise effect of energy storage coupler has a great impact on the whole lithium battery energy storage system. Therefore, low temperature rise planning has become an inevitable trend in the development of energy storage coupler.

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At present, in the field of energy storage, the application and development of lithium batteries are very sensitive. Lithium battery energy storage has the advantages of high energy density, long service life and green environmental protection. However, it also has some disadvantages, such as high production cost, poor safety function and the risk of explosion. Therefore, the safety planning of heat treatment system is very important for the application of lithium batteries, As an indispensable element in series and parallel between battery packs, the temperature rise effect of energy storage coupler has a great impact on the whole lithium battery energy storage system. Therefore, low temperature rise planning has become an inevitable trend in the development of energy storage coupler.

In the lithium battery energy storage system, the temperature sensitivity of lithium battery mainly comes from the temperature sensitivity of its material physicochemical properties. Temperature will directly affect the activity and conductivity of electrode materials, the embedding and de embedding of lithium ions on the electrode, the lithium ion permeability of the diaphragm, and then affect the electrochemical response inside the battery, which is externally manifested as the temperature sensitivity of the power battery. Because the power battery has a suitable operating temperature plan, the greater the activity of its internal active substances with the increase of temperature in this plan, the charge and discharge voltage and capacity of the battery will increase, the internal resistance of the battery will decrease, and the charge and discharge power of the power battery will increase accordingly. However, when the temperature exceeds the certain planning, too high temperature will accelerate the progress of internal side reactions of the battery, which consume lithium ions, solvents and electrolyte, resulting in the attenuation of battery function.

The research shows that when the battery continues to operate above 45, its cycle life decreases significantly, which is more obvious when charging and discharging at high rate. Therefore, if you work in a high temperature environment for a long time, the service life of the power battery will be significantly shortened, its function will be greatly reduced, and even lead to safety accidents. Similarly, if the temperature is too low, the activity of active substances in the battery will decrease significantly, the internal group and polarization voltage will increase, the charge and discharge power and capacity will decrease significantly, and even cause the irreversible attenuation of battery capacity and bury potential safety hazards. Especially in the charging process, under the effect of the external electric field of the charging equipment, lithium ions escape from the positive electrode, enter the electrolyte and move to the negative electrode, successively enter the negative electrode composed of graphite and form LIC compounds.

In addition, the long-term uneven distribution of the temperature field inside the battery box will also lead to the imbalance of the functions of each battery module and monomer. In particular, the aging rate of the battery distributed in the high-temperature area will be significantly faster than that in the low-temperature part. With the accumulation of time, the physical differences between different batteries will become more obvious, and then the consistency between batteries will become worse, and even early failure will occur, The service life of the whole power battery system is shortened.

The energy storage coupler is a necessary component for series and parallel connection between battery packs. When the battery pack is charged and discharged, the passage of large current will produce thermal effect on the coupler. When the temperature of the coupler rises and exceeds the temperature of the battery pack, the temperature will be transmitted to the inside of the battery, and then affect the stability of the battery. Therefore, it is a necessary condition for the coupler to reach the low temperature rise, The energy storage coupler adopts the terminal skills of the company's independent intellectual property rights to keep the contact surface between the terminal and the pin at the best area, effectively reduce the contact resistance, reduce the overcurrent density and reduce the current temperature rise; Together with this, the new appearance planning plans multiple appearances into corrugated sectors, which improves the heat dissipation function.

In addition, imported high-purity red copper is selected as the metal material, with high conductivity and stable over-current temperature rise. The plastic material uses unique alloy materials, integrates a variety of plastic characteristics, combines the characteristics of high strength and high toughness, meets the fire protection requirements, has high thermal conductivity and speeds up heat dissipation; In terms of the connection skills between the internal terminal and the wire nose, the first patented technology is selected to ensure the connection reliability of the two, increase the contact area and reduce the overcurrent temperature rise. Together, the stable and robust multi-point crimping process effectively reduces the connection temperature rise between the wire nose and the wire and ensures the consistency of the temperature rise. At present, the temperature rise test results of couplings with different current levels can be controlled below 35 ℃ (ambient temperature 20 ℃).

Lithium battery energy storage is an inevitable trend of development in the S. ensuring the safe and reliable operation of lithium battery is the primary condition for the operation of energy storage system. As an indispensable part of lithium battery energy storage, the company has always adhered to the product planning concept of safety, reliability and environmental protection to supply special energy storage and electric coupling products for lithium battery.

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