The battery is no longer exploded?

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

Although there is less and less replaceable lithium battery phone, because the news of the mobile phone battery explosion causes the news that the person injured is still occurring, the problem of battery explosion often blames the user's private purchase of a lithium battery in the market, however There are more and more mobile phone brands, and the plant size of the substitute and lithium battery is also uneven. Unqualified batteries are easy to fever, expand, exist of explosion. In order to standardize the lithium electronics market, the Ministry of Industry and Information Technology has issued the "Lithium Ion Battery Industry Standard Condition", the purpose is to strengthen the management of lithium-ion battery industry, improve the development level of the industry, guide industrial transformation and upgrading and structural adjustment, and promote continuous and healthy development of lithium-ion battery industry.

"Lithium-ion battery industry standard conditions" set thresholds in industrial layout, production scale, product quality, etc., which require: 1. Battery production capacity is not less than 100 million watts; 2, positive electrode material annual production capacity No less than 2,000 tons; 3, the annual capacity of the negative electrode material is not less than 2,000 tons; 4, the annual output of the membrane is not less than 20 million square meters; 5.

6. The actual production of the previous year is not less than 50% of the actual capacity when the company declares. Lithium-e-producer should meet the following requirements in technology, equipment and related supporting facilities: Applying thickness and length detection means, the measurement accuracy of the coating thickness is 2 μm, the measurement accuracy of the coating length is not less than 1 mm; 3, should have the burr sample detection ability generated after the battery electrode shear, the detection accuracy is 1 μm; 4, It should have a water content sample detection ability after the battery electrode dried, and the detection accuracy is 10 ppm; 5, the alignment sampling ability of the battery electrode wound / laminate should have the detection accuracy of 0.

1 mm; 6, should have battery assembly. The internal short circuit online detection ability; 7. For the composition of the multi-core battery pack, there should be an open circuit voltage and internal resistance online detection capability, and the detection accuracy is 1mV and 1 MΩ; 8, should have a protective plate function online detection.

In addition, lithium-ion battery manufacturing enterprises must have relevant standards and safety testing capabilities, encourage enterprises to provide environmental adaptive inspection instruments and equipment, with battery environment adaptive detection capabilities. Battery 1, consumption single battery energy density ≥ 150WH / kg, battery pack energy density ≥120WH / kg, polymer monomer battery volume energy density ≥ 550WH / L. Circulating life ≥ 400 times and capacity retention ratio ≥80%.

2, power type battery partiable and power type, wherein the energy-type cell energy density is ≥120Wh / kg, battery pack energy density ≥ 85WH / kg, cycle life ≥ 1500 times, capacity retention ratio ≥80%. Power type battery power density ≥ 3000W / kg, battery pack power density ≥ 2100W / kg, cycle life ≥ 2000 and capacity retention ratio ≥80%. Electric bicycle battery pack cycle life ≥ 600 times and capacity retention ratio ≥80%, electric tool battery pack cycle life ≥ 500 times and capacity retention ratio ≥80%.

3, energy storage unit battery energy density ≥ 110Wh / kg, battery pack energy density ≥ 75Wh / kg, circulating life ≥ 2000 times and capacity retention ratio ≥80%. The positive material specific capacity is evaluated by a buckle 2032 battery, and the circulatory life is 18650 evaluation results. 1, lithium cobaltate ratio capacity ≥ 150ah / kg, magnetic non-purity content ≤ 100 ppb, circulating life 300 times and capacity retention ratio ≥80%.

2, lithium manganate ratio capacity ≥95ah / kg, magnetic non-purity content ≤ 100 ppb, circulating life 300 times and capacity retention ratio ≥80%. 3, lithium iron phosphate ratio capacity ≥ 140ah / kg, circulating life 800 times and capacity retention ratio ≥80%. 4, three-dimensional material specific capacity ≥ 150ah / kg, magnetic non-purity content ≤ 100 ppb, circulating life 300 times and capacity retention ratio ≥80%.

5, other positive electrode material performance indicators can refer to the above requirements. The negative electrode material is compared with the evaluation result of a buckle 2032 type battery, and the circulating life is 18650 evaluation results. 1, carbon material specific capacity ≥ 320ah / kg, magnetic non-purity content ≤ 100 ppb, circulating life 300 times and capacity retention ratio ≥ 85%.

2, the lithium titanate material is ≥150ah / kg, the magnetic non-purity content ≤ 100 ppb, the cycle life is 1000 times, the capacity retention ratio is ≥80%. 3, silicon carbon material specific capacity ≥ 400ah / kg, magnetic non-purity content ≤ 100 ppb, circulating life 300 times and capacity retention ratio ≥80%. 4, amorphous carbon negative material specific capacity ≥ 250ah / kg, first efficiency> 80%, cycle life 1000 times, capacity retention ratio ≥80%.

5, other negative material performance indicators can refer to the above requirements. Diring dry one-way stretching method: longitudinal tensile strength ≥ 110 MPa, heat shrinkage ratio ≤ 6%; lateral tensile strength ≥ 10 MPa, lateral heat shrinkage ratio ≤ 1%, longitudinal heat shrinkage ratio ≤ 6%; puncture strength ≥1.33 N / μm; porosity%; gas permeability S / 100ml.

Dry two-way stretching method: longitudinal tensile strength ≥100MPa, lateral tensile strength ≥ 25 MPa, heat shrinkage ratio ≤ 5%, puncture strength ≥1.33N / μm, porosity%, gas permeability S / 100ml. Wet two-way stretch: longitudinal tensile strength ≥ 100MPa, lateral tensile strength ≥ 60 MPa, heat shrinkage ratio ≤ 13%, puncture strength ≥ 2.

04N / μm, porosity%, gas permeability S / 100ml. The water content of the electrolyte is not higher than 20 ppm, hydrogen fluoride is not higher than 50 ppm, and the monoma is not more than 1 ppm. Edit Comment: Lithium-ion battery in everyday use involves personal safety, quality is quite important.

The renewal of the lithium-ion battery industry will make a small factory with low quality, but the standard is standardized. If there is no relevant departments to follow up, user security is still unable to obtain guarantee. .

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