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| BYD hexagonal prism battery came out, or shuffled the battery field |
| Release time:2023-02-07 09:12:42| Viewed： |
BYD hexagonal prism battery came out, or shuffled the battery field
China's new energy has not developed rapidly in the past 20 years. As one of the "three major components" of electric vehicles, battery is undergoing wave after wave of revolutionary evolution. The most striking thing is the huge industrial effect of D caused by BYD's introduction of blade battery. Subsequently, GAC Aian launched the "magazine battery", and Ningde Times also launched the "Kirin battery". These are the current top battery technologies.
Two years after the introduction of the blade battery, there was news that BYD's six-prism battery came out on January 30.
In August 2022, BYD announced the types of new battery patents, and the cylindrical hexagonal prism battery emerged as the result. According to the released patent map, this new battery is very different from the common square battery and cylindrical battery, and the single cell of the battery presents a hexagonal prism shape, which is believed to be inspired by bionics from the honeycomb structure. The biggest benefit of this design is that it is more conducive to the close fit between the battery and the battery, and improves the space utilization rate and energy density of the battery pack.
In fact, starting from the blade battery, it is to find space for improvement from the internal physical structure of the battery, so as to improve the energy density and utilization rate. This time, BYD seems to start with the physical structure again to "squeeze" higher performance utilization.
According to the data on the patent, the height of the whole shell (cover+shell) is between 60 and 150 mm, which is about half the size of the Apple phone. The diameter of the connecting circle in the shell is between 15 and 60 mm. It is worth mentioning that the patent also mentions that "the height of the shell can be 90mm, and the diameter of the inner circle can be 40mm". According to the naming rules of the battery, we can call this battery "4090 battery". As a reference, the Tesla 4680 battery has a height of 80mm and a diameter of 46mm. So compared with Tesla's 4680 battery, BYD's hexagonal prism battery will appear "tall and thin".
Speaking of the Tesla 4680 battery, it is the most advanced battery in the world because of its exquisite design and complex technology. The 4680 battery based on ternary high nickel material, installed on Tesla cars, can make the charging speed reach 200kW level, and the fastest acceleration speed can reach 2s level.
So is BYD 4090 battery the real competitor of Tesla 4680 battery? Let's make a simple comparison.
First of all, the 4090 and 4680 batteries will use CPC technology, that is, the non-module scheme. The whole battery pack is full of batteries, and there is no well-shaped basic frame. The battery will use side cooling, which is more efficient, and the vehicle's performance will be better.
First of all, in terms of structural strength, when the 4680 cylindrical cells are combined together, the space between the two adjacent cylindrical cells is large, which will make the mechanical stability of the cylindrical cells insufficient. When subjected to external vibration or impact, it may cause short circuit or damage, seriously affecting the safety of the vehicle. The hexagonal prism "4090 battery", after being grouped, forms a honeycomb shape, which can make no gap in front of the battery monomer, which is equivalent to "reporting the group to take the hard", thus improving the structural strength of the battery pack.
In addition, it is reported that the shell material of hexagonal prism "4090 battery" may be aluminum alloy. This can not only ensure the strength of the power battery, but also reduce the weight of the battery pack. The significance of this high-strength battery pack is not only in terms of safety, but also in the future development trend of BYD.
In addition, 4680 cylindrical cell and 4090 hexagonal prism cell also have different properties in other aspects. When we talked about the honeycomb structure, we mentioned that because of the hexagonal structure, the internal space is more than the circle. Therefore, the "4090 battery" with hexagonal prism is willing to hold more electrolyte to prolong the service life of the electrode core, and effectively improve the utilization of external space when connecting multiple batteries into battery modules.
Moreover, the two types of batteries also have different structures on the positive and negative electrodes of the cell. The Tesla 4680 battery adopts the electrodeless ear scheme. The internal process is very complex and the manufacturing difficulty is very high. The lug of the 4090 battery is more obvious. The rectangular block is the positive pole, and the middle cylinder is the negative pole. The positive and negative poles are separated by the height difference.
The above is the result of the comparison of the patent information disclosed at present. In addition to these patent information, some netizens also left many questions about BYD 4090 battery. For example, although the manufacturing difficulty has decreased, can the 4090 battery reach the same level as the 4680 battery in terms of performance? What kind of battery material will BYD 4090 battery use? If ternary materials are used, can they be as safe as blade batteries? For example, will BYD really mass produce this battery on multiple models? Of course, the ultimate question is whether the 4090 battery can bring as shocking success as the blade battery? However, BYD's development of battery technology will not be limited to blade batteries. In the future, blade batteries and hexagonal prism batteries may become the "double cannon" of China's independent batteries. |
