I will sort out the materials I have received at home on the weekend and do some personal understanding. A2mac1 released a rather vague picture, I made some comments on it, as shown below, from the perspective of the electrical system, this system is indeed highly integrated, which is reflected in the following points:
1) In the four long modules, the voltage sampling line and temperature sampling point are basically made on the FPC, which simplifies the wiring harness design part of the module assembly process. There are several advantages here.
The 23-25 ​​series unit adopts a CMU system for collection. The communication loop between the CMU and the BMS at the end is as short as possible. The relatively usable daisy chain of PHEV can be used in a pure electric motor with a length of 2 meters. Inside the battery system
The wiring trough and assembly process of the low-voltage wiring harness all use one process, and the bonding process is substituted
2) In the entire module, the high-voltage circuit is relatively simple, making the entire system very concise, and a lot of simplification has been done on the entire external input connector and output connector.
The design of the copper busbar is not so easy to use. In the current design, the connection structure and the copper medal for electrical safety are simplified in a certain area
The original connection weakness of the Busbar of the module is optimized by improving the shape and connection method
The connection of this Busbar is old and weird, from the bottom to the top from the structure to the top 3D connection.
3) The design of the entire battery system is more rational than before
As shown in the figure below, on the whole, the battery system and the chassis are highly integrated, and it still tends to be separated to maintain integrity. At present, it is easier to separate the design, which can separate the integrity of the battery system and the vehicle. Just ensure that the electrical and structural connections are simplified.
The design from the link below is still very good.
Here, the main positive and main negative contactors, as well as the quick-charge contactors, including the fuse that can be cut off, are all very interesting in shape. After taking it apart
One more thing is the charging curve of Tesla Model 3.
At present, it can be seen that it is difficult to quickly charge customers' perceptions of the heat generated by high nickel, especially the energy efficiency under high C-rate (charging DCR is relatively large). The increase in the mileage that can be achieved per unit time is indeed improved, but the time to fully charge is also lengthened.
Peak charging power of 116kW (1.5C)
Reduce power at 45% SOC, to 60% close to 1C 80kW
20%-90% is about 60 minutes
Different cars can see this power increase, and the holding speed of 100kW is about 10 minutes.
Summary: Many things are quite interesting, you can take a look.
Adapter Ring,Ring Camera Adapter,Lens Adapter,Camera Adapter
Shaoxing Shangyu Kenuo Photographic Equipment Factory , https://www.kernelphoto.com