The quality of electric vehicle batteries can be judged from the following points:
1. Check if the packaging is intact
Usually from the moment it leaves the store. factory at the time of its sale, the outer packaging is The packaging is very tight Except for a few unpackaged samples, the rest of the packaging will not be moved. Therefore, when purchasing an electric vehicle battery, be sure to ask the boss. open the packaging to see if it is in good condition. Don't just believe that everything the boss sells is good. You should insist on new products that have not been disassembled. It's getting safer and safer.
2. Look at the appearance of the battery
The appearance of new batteries is usually very clean and beautiful, with no signs of scratches or scratches. When inspecting the goods, make sure. to take it apart and check it, see if it is. If there are rayures or scratches, so be careful that the boss sold you an old reconditioned battery.
3. Look at the price
Under the same circumstances, the price of new batteries is a little more expensive than that of second-hand batteries, and it is not easy to reduce the price. . If the battery you buy is better than the same brand. If the battery is cheap and the price fluctuates significantly, you should be careful.
I wonder if you already have your own ideas about whether an electric vehicle battery is old or new. Here, professionals would also like to remind you that the electric vehicle battery is the key part you should use. those and don't settle for the random ones, otherwise it's always you who will suffer. As for whether old and new batteries can be used at the same time, professionalsadvise doing so, because the capacity and operating efficiency of the two are different. Even if they are forcibly bound, even if they can be used. will cause great harm to each other.
Finally, it is recommended that when consumers buy electric vehicle batteries, if they do not want to be deceived and buy second-hand batteries, they might as well go to a specialized store or a major brand electrical store. vehicle battery distribution point to purchase them. Not only is quality assured, but subsequent maintenance is also guaranteed.
Detailed information:
Types of electric vehicle batteries
Lead acid batteries
Lead acid batteries for comparison A mature technology, due to its low cost and ability to discharge at high rates, remains the only electric vehicle battery forbefore being mass-produced. During the Beijing Olympics, 20 electric vehicles used lead-acid batteries to provide transportation services for the Olympics. However, the specific energy, specific power and energy density of lead-acid batteries are very low, and electric vehicles that use it as a power source cannot have good speed and cruising range.
Nickel-cadmium batteries and nickel-metal hydride batteries
Although their performance is better than that of lead-acid batteries, they contain heavy metals and will cause air pollution environment after use and disposal. Nickel-metal hydride power batteries have just entered a maturity phase and are currently the only battery systems used in hybrid vehicles that have actually been verified, commercialized and scaled. 99%of the existing hybrid battery market share is made up of nickel-metal hydride power batteries. and commercial The representative of globalization is the Toyota Prius. At present, the world's leading automobile power battery manufacturers mainly include Japan's PEVE, and Sanyo dominates the global hybrid battery industry.It holds 85% of the vehicle nickel-metal hydride battery market.
Lithium batteries
Traditional lead-acid batteries, nickel-cadmium batteries, and nickel-metal hydride batteries are relatively technologically mature, but there are problems major when used as power batteries. in cars. At present, more and more automobile manufacturers choose to use lithium batteries as power batteries for new energy vehicles. Because thelithium-ion batteries have the following advantages: high operating voltage (3 times that of nickel-cadmium batteries and nickel-hydrogen batteries); significant specific energy (up to 165 WH/kg, three times that of nickel-hydrogen batteries); small size ; lightweight ; long life expectancy ; low self-discharge rate; no memory effect, etc.
Lithium iron phosphate battery
Lithium iron phosphate battery is also a lithium battery. Its specific energy is less than half of that of lithium cobalt oxide battery, but it is very safe and can. cycle up to 2000 times, the discharge is stable and the price is cheap, making it a new choice for vehicle power. The "iron battery" proposed by BYD, industry insiders believe it is more likely to be a lithium iron phosphate battery.
Fuel cell
In simple terms, a fuel cell (Fuel? Cell) is an electricity production device that directly converts the chemical energy present in fuel and oxidizer into electrical energy. Fuel and air are respectively fed into the fuel cell and electricity is produced wonderfully. It looks like a battery with positive and negative electrodes and electrolytes, but in fact it cannot "store electricity" but is a "power plant". The proton exchange membrane fuel cell is the most promising solution for automobiles.
Reference materials:
Hello, Shanghai currently accepts lithium battery cells for air and sea transportation. But it depends on your battery power. World Air Express Shanghai can ship. Is it considered a dangerous product?if the power exceeds 100WH? This requires UN38.3 testing, required for our exports to the continent.