What's in the lithium battery of an electric car?

The general 18650 cylindrical battery looks similar to the No.5 dry battery we use, but it is longer and thicker. The monomer voltage is 4.2V, which reaches the corresponding use voltage after series connection and reaches a certain capacity after parallel connection. Then there will be a protective plate to control the battery to charge and discharge evenly, so as to keep the charge and discharge of each monomer consistent and avoid local damage.

With the support of national policies and the introduction of the new national standard for electric vehicles, the development of lithium batteries has ushered in great opportunities. At present, the lithium battery industry has formed a complete industrial chain with a high degree of specialization. So, how to make high-quality lithium batteries for electric vehicles? Five details, tell you!

Details 1: battery capacity, full computer monitoring

Every cell of high-quality lithium battery is controlled by consistency! All batteries are scanned with capacity dividing equipment, and the computer automatically records the capacity, internal resistance and voltage of each battery according to the contents of the scanning code. Secondly, all single cells are sprayed with model capacity, wH, barcode, batch number and traceable production date code.

Detail 2: Advanced spot welding, higher technology

High-quality lithium batteries are connected in series and parallel with the most advanced spot welding equipment in China. Both spot welding position and current are monitored by computer-set parameters. When welding, the computer automatically monitors the current passing through the battery to carry out virtual welding. If the welding is not firm, it will alarm and stop!

Detail 3: Finished product aging test, strict standards

Each group of high-quality lithium batteries will adopt domestic advanced aging equipment, and the finished products will be tested for 100% aging ability. When the battery has the following two conditions, it will not be shipped. First, the battery capacity is cycled for 3 weeks, and it will not be shipped if it drops more than 0.02%; When the high-temperature aging capacity voltage (voltage drop) is different, a group of batteries exceeding 15mv between each string will not be shipped.

Detail 4: Customizable protective plate

High-quality lithium battery, equipped with the most advanced R&D patented BMS protection system in China. Effectively prevent the electronic components of the protection system from waterproof, high temperature resistance, oxidation, impact and other functions, and protect the battery pack during normal use (overcharge, overdischarge, short circuit, undervoltage, overcurrent, temperature control).

Detail 5: Unique customized four-prevention and four-traceability battery packaging

In terms of appearance packaging, high-quality lithium batteries also have design and invention patents. The outer boxes are all made of 1mm alloy material and high-temperature plastic spraying technology to realize collision prevention, dustproof, waterproof and explosion-proof; At the same time, all finished products are marked with laser anti-identification code, which not only ensures the quality of products, but also is responsible for every user.

In short, high-quality lithium batteries can fully ensure the consistency and stability of products only by doing these five details well. In the future, only by cooperating with such safe and secure lithium battery brands can dealers win a greater breakthrough in the trend of lithium batteries.