What are the lithium battery security features at low temperature?

Source: 2020 - 04 - 19 20:08 hits: low temperature lithium battery safety features include storage environment temperature 40 degrees - at low temperature Storage environment temperature, low pressure working environment adaptability, security features also includes a pulse of lithium-ion batteries used in low temperature, temperature shock, vibration, low temperature, monomer lithium battery safety features, low temperature lithium battery safety features such as content, this article by the lithium battery manufacturers in the production of the mystery of the battery, it found that some of the low temperature performance, to discuss with you about the safety of lithium-ion batteries as shown in the figure below. A, the safety of the lithium battery pack, and environmental adaptability analysis of lithium battery safety features 1 at low temperature. The temperature of the low temperature lithium battery safety features analysis 1) Storage environment temperature is 70 ℃ ambient temperature & plusmn; 2 ℃, can store 48 hours, lithium-ion battery pack without aeration, deformation and damage. When the lithium battery returned to normal temperature, can satisfy the requirement of the regulations to charge and discharge. When the environment temperature for - 55℃± 2 ℃, can store 48 hours, not deformation, not damage the lithium-ion battery pack. When the lithium battery returned to normal temperature, can satisfy the requirement of the regulations to charge and discharge. 2) Charging temperature: working environment temperature 0 ℃ ~ + 40 ℃. Discharge temperature: - 40℃~ +55℃( More than 0 ℃ satisfies the requirement of discharge; When - 40 ℃ ~ 0 ℃, external heating unit ( The heating film) Lithium-ion battery pack can be heated to above 0 ℃, satisfies a single lithium-ion battery discharge temperature requirements. 2. High altitude ( Low pressure) Lithium battery charging can at an altitude of 5000 meters above normal, and can be carried out in accordance with the discharge requirements discharge, during charging and discharging lithium batteries battery should be no gas, no distortion, no damage. 3. The lithium battery security features at low temperature impact analysis will be fully charged lithium-ion battery pack rigid fixed on the impact test bench, impact acceleration is 392 m/S. 2. The lithium battery security features of pulse method at low temperature. Impact test, the duration of the 6 ms. In three perpendicular axis, twice each axis direction of the positive and negative impact, lithium-ion battery pack should not leak, no fire, no explosion, the overall size is the same as the original size, error is not more than 2 mm. Lithium-ion batteries have been measured open circuit voltage range for 43. 2 v ~ 50。 4 v, lithium battery can discharge requirements of discharge by the regulation. 4. The vibration of the lithium battery security features method at low temperature, will be full of power lithium-ion battery pack with a clamp fixed on the vibration table, exert the amplitude of 0. 76mm( Double amplitude of 1. 52mm) Sinusoidal vibration. Vibration frequency range of 10 hz ~ 55 hz. From 10 hz to 55 hz to 10 hz, scanning takes about a minute at a time. Lithium battery should be vibration in three directions. B, the direction of vibration time of 90 ~ 100 minutes, the test time is 270 ~ 300 minutes. Lithium-ion battery pack should not leak, no fire, no explosion, and keep the original size, its overall size error is not more than 2 mm. The measured lithium battery open circuit voltage range for 43. 2 v ~ 50。 4v。 Vibration in all directions from a lithium-ion battery pack. After vibration, lithium battery can discharge requirements of discharge by the regulation. 5. The influence of the temperature of analysis of lithium battery in the - 40° c± 2° c ( 70° c± 2° c) Test cases, and maintain a constant temperature 2 hours at the same temperature, and then quickly ( Time is not more than 1 minute) Move to the 70 & deg; c± 2° c ( - 40° c± 2° c) Test cases, and at the same temperature, keep constant temperature for 2 hours, 1 cycle count. After four circulation, remove the lithium battery pack, around 25 ℃ for at least 2 hours, the li-ion battery at room temperature. Lithium battery should not be out of shape, craze or leakage. Lithium-ion battery pack can be discharge according to the requirements of the prescribed discharge.