1.5V rechargeable battery

　　Which one has better technology, Tesla battery or BYD 1.5V rechargeable battery?

　　Which one has better battery technology, Tesla battery or BYD? If you want to compare BYD and Tesla, it is inevitable to compare which of them has better battery technology. Most of BYD's models use ternary lithium batteries, while more BYD models use lithium iron phosphate batteries. Both types of batteries have their own pros and cons. Lithium iron phosphate batteries have the advantages of long life, safety, and high discharge efficiency.

　　Which one has better technology, Tesla battery or BYD 1.5V rechargeable battery?

　　Tesla Model S uses a lithium battery pack composed of Panasonic 18650. A single battery of this type is larger than the usual AA battery. It is also called a ternary lithium battery. BYD specializes in a mainstream lithium battery on the market. It's called a lithium iron phosphate battery.

　　1.Battery structure comparison

　　In terms of battery structure, Tesla uses 7,000 sets of small single cells. The reason for choosing small batteries is that Tesla will only need to replace a small piece if the battery breaks in the future, instead of having to replace a large set of batteries collectively. Tesla's best technology is the BMS (battery manager), which can completely coordinate these 7,000 batteries. However, the actual situation is that Panasonic's lithium cobalt oxide battery cannot be made into a large battery due to its high energy density. Moreover, Panasonic's small battery production technology and production lines are relatively mature.

　　In contrast to this situation, BYD chose a large lithium iron phosphate battery pack. It is precisely because of the advantage of low battery energy density that it reduces the difficulty of controlling the unit to make a large battery pack, which is not suitable for electric vehicles whose technology is not mature. It is undoubtedly a good choice. The structure of lithium batteries is undoubtedly the same, and each has its own merits.

　　2.Battery performance comparison

　　BYD uses lithium iron phosphate batteries more often. Lithium iron phosphate batteries have a longer service life and better safety performance. However, the energy density is relatively low and the cost of charging and discharging is relatively high. For the same cruising range, lithium iron phosphate batteries require more battery units.

　　Tesla uses Panasonic's ternary lithium batteries more often. Ternary lithium batteries have good consistency, high energy density, long cruising range, and the production technology is relatively mature. The same number of battery packs can store more power. For Tesla, it does not have its own battery production base. BYD is a self-sufficient company that can produce its own batteries.

　　3. Comparison of battery cost and price

　　BYD focuses on the mid- to low-end household market, and all its products are popular. Even its most expensive model only costs over 300,000 yuan, which is more conscientious than Tesla, which focuses on high-end products. After all, Tesla's main focus is million-level high-end electric vehicles, which are obviously beyond the reach of ordinary families. Although the battery life of the two sides is not much different, the price difference cannot be ignored. The reason for such a large price gap is still the cost of lithium batteries.

　　4. Comparison of battery production capabilities

　　Tesla and BYD cannot be compared. First of all, BYD is completely independent from lithium batteries to vehicle production, while Tesla relies on suppliers for its battery packs, and its production capacity will be greatly constrained. Therefore, Tesla has been unable to deliver new cars on time. Profits are also quite weak. But BYD can freely control the rhythm and continuously improve itself.

　　5.Battery life comparison

　　The number of cycles of lithium iron phosphate batteries can reach more than 2,000 times. If used once a day, it can be used for 5-6 years. The number of cycles of ternary lithium batteries is relatively less. In actual use, the number of complete charge and discharge cycles is more than 800 times. If the same If calculated based on a four-day cycle, it can last at least ten years.

　　6.Battery safety performance comparison

　　The thermal stability of lithium iron phosphate batteries is very good. The structure is still relatively stable at 600 degrees. Because the ferric ions are not active, it is difficult to undergo chemical changes. Even if the battery board is punctured or short-circuited, as long as the design is reasonable, it will not explode or burn. , and the life span is better than that of ternary lithium pool. Similarly, there is a hidden danger of ternary lithium batteries catching fire in collision accidents in extreme environments. There are many Teslas burning in the United States. Although Tesla tried its best to protect 7,000 ternary lithium batteries, minor accidents occurred. Natural events will inevitably occur.

　　Summary: The battery technologies of Tesla and BYD should be comparable. Who do you think is better?

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