Xiaopeng 's flying car recently completed its first overseas flight in Dubai .
Frontier Jun learned from National Intellectual Property Office that in addition to being busy flying into the sky, Xiaopeng recently published a patent related to hexagonal prism battery.
It’s a coincidence. Some time ago, Qianxingjun just reported the patent for BYD ’s hexagonal prism battery.
On August 5, BYD published a utility model patent called "Battery and Battery Module and Battery Pack", which mentioned a hexagram battery with a height between 60~150mm and an inline circle diameter between 15~60mm. One of the preset dimensions of
is 40mm inner diameter 90mm height, which is about the same size as 4680 of Tesla .
What is the difference between the hexagonal prism battery that Xiaopeng also applied for this time and BYD? The patent of
is called "Battery Module, Battery Pack and Vehicle", and is also a utility model patent. It was applied for by Xiaopeng in April this year and authorized in October. Judging from the patent content, it does not disclose specific dimensions, but focuses on the external shape and the internal core structure.
patent description: In addition to regular hexagonal , the shape of the battery cell monomer can also be a regular quadrilateral shape, and the battery cell monomer is arranged in a honeycomb-like shape.
battery cell monomer consists of a shell and a battery cell, and is installed in the cavities of the shell. The battery cell is a regular hexagonal reel, or a circular reel, or an elliptical reel, or a stacked reel. When
is used to form a module, the connection method between the battery cell monomers can be connected in series, parallel, or series-parallel. According to the needs of actual application, the series-parallel connection method between the battery cell monomers in the battery cell module can be flexibly adjusted to adapt to the voltage range, power requirements and battery pack size of the battery pack.
In terms of the material selection of the battery cell, it can be a ternary battery cell or a lithium iron phosphate battery cell. Among them, the electrode expansion of the lithium iron phosphate battery cell is smaller during charging and discharging and aging, so the battery cell can adopt a circular core; while the ternary battery cell expands more during charging and discharging and aging, so it is not suitable for circular core. For other rolled cores or stacked cores, both electrochemical systems (ternary, lithium iron phosphate ) can be used compatible. The gap between the cell monomers of
is between 0.1 mm and 10 mm.
In the patent, Xiaopeng believes that through this honeycomb arrangement of regular hexagonal or regular quadrilateral battery cell monomers, one battery cell monomer is adjacent to four or six battery cell monomers, which not only achieves a high degree of integration of battery cell monomers in the battery pack, but also is more conducive to heat dissipation. When a single battery cell monomer gets heat out of control, the heat released will be distributed equally to the surrounding four or six battery cell monomers, which will not easily trigger heat spread, and solve the problem of not having both energy density and heat spreading safety.
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