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Tesla V4 Supercharger
Tesla V4 Supercharger is here, Tesla will build its first V4 supercharger in Arizona, USA. The new station is said to have 40 charging potentials, it will generate electricity using its own solar panel and is equipped with 3 MWh Megapack form for on-site energy storage.
Tesla V4 Supercharger looks very similar to the Megacharger that truck-charged, and they will be taller and narrower than V3 Supercharger.
One of the main changes is the cable, which is located on the outside of the base rather than on the inside (like in V3), which can make the cable longer and make it easier to charge the car in different directions. According to the drawings, the plug handle height of the V3 and V4 is expected to be the same (about 48 inches). The maximum charging power of the Tesla V4 Supercharger has not been released yet and is expected to be 350 kW.
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Tesla V3 Supercharger
In order to solve the problem of long power replenishment time and mileage anxiety, Tesla has launched the third generation of Supercharger with a peak power of 250 kW.
We checked relevant information on the Internet and showed that the battery voltage platform of Model 3 is about 350V. According to the instantaneous power of 250 kW, we can roughly estimate that the maximum power charging current is about 700A. In terms of
charging socket, we have analyzed it before. It uses taiko HC Stak 35 terminal matches a shielded cable of 95 square meters, and the current carrying capacity reaches 330A@85℃ current carrying capacity. Tesla cables generally have a temperature resistance level of 180℃. The charging socket analysis can be seen. Tesla Automobile High Voltage Connector Form Research and Application Analysis
5 square cable must withstand a charging current of 700A, which is difficult to last for a long time. Moreover, we know that the part where the temperature rises the highest in the wiring harness is at the connection part when powered on, which is the crimping (or) welding of conductive terminals and the terminal connection part. The thermal imaging below shows that the high temperature zone is in the crimping area of the terminal.
The following is a graph of the charging power and time of Tesla V3, V2, and V1
In order to protect the charging cable and battery, the internal use of the battery is generally used to connect copper bars, and its overload capacity is higher than that of the cable. The high-power section in the charging strategy must not last too long, and the super charging situation cannot be used frequently, which will cause the cable or connection area to be unable to charge normally at high temperatures. Below we see that the thermal imaging of the Tesla supercharging process shows that the highest temperature is at the charging connection point, and the temperature reaches 111℃.
Tesla's third-generation Supercharger is equipped with a liquid-cooled charging gun to make the wire diameter of the charging cable smaller. We know that the charging current increases. In order to ensure that the current carrier does not heat up, the conductor diameter of the cable must also be increased. This is particularly inconvenient to charge. Sometimes it may also require the help of a power device, especially when the charging cable becomes hard in winter, which makes it difficult to bend and move.
In order to better charge and consider the charging experience of female customers, Tesla has developed a new liquid-cooled charging connector.
The following is an introduction to the patent of Tesla's new liquid-cooled charging connector.
"The charging connector includes a first electrical socket and a second electrical socket. A first sleepe and a second sleepe are provided, such that the first sleepe is concentratedly coupled to the first electric socket and the second sleepe is concentratedly coupled to the second electric socket. A manifold assembly is adapted to enclose the first and second electric sockets and the first and second sleeps, such that the first and second sleeps and the manifold assembly create a hollow interior space there between. An inlet conduit and an outlett conduit within the manifold assembly such that inlet conduit, the interior space, and the outlet conduit together create a fluid flow path."
Translation: The charging connector includes a first and second socket and the manifold assembly create a hollow interior space there between. The first sleeve and the second sleeve are provided such that the first sleeve is concentrically coupled to the first electrical socket and the second sleeve is concentrically coupled to the second electrical socket. The manifold assembly is adapted to surround the first and second electrical sockets and the first and second sleeves such that the first and second sleeves and the manifold assembly form a hollow internal space therebetween. The inlet conduit and outlet conduit within the manifold assembly enable the inlet conduit, internal space and outlet conduit to form a fluid flow path. ”
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Tesla V3 Supercharger Internal structure
Below is the product of a domestic charging company
Its charging temperature under the charging current 600A is shown in the table below.
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Tesla V2 Supercharger and wall charging
The following figure shows Tesla V2 (150KW) charging, ordinary DC charging 72KW, and different wall charging methods.
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Tesla Megacharger (for trucks)
Tesla Semi Arguably the cleanest design we've seen on the truck, it seems to belong to the future, with a huge wraparound glass area in the front, sloping to the rear. The glass area is so large that its panels extend to the door. Tesla puts down the rearview mirror on the Semi for aerodynamic advantage.
diesel trucks usually have huge grilles to maximize airflow from high-capacity engines. Tesla Semi is an electric car with its nose blocked while its chin has a relatively small air intake to cool the battery located between the front and rear axles. It has an axle at the front and two axles at the rear, forming a 6×4 Tractor layout. The rear is equipped with a trailer lathe and traction hook.
Musk made an important statement on the aerodynamic capabilities of the Tesla Semi, explaining its smooth surface and clean overall design. The truck is designed like a bullet. The Tesla Semi has a drag coefficient of 0.36. Better than the Bugatti Chiron, which has a drag coefficient of 0.38. aerodynamics helped it achieve an incredible range.
800 volt electrical system
Tesla believes that for Small and medium models like Model 3, Model Y, and Tesla RoboTaxi cost a lot to switch from a 400-volt architecture to an 800-volt architecture. However, higher system voltages are significant for large vehicles like Cybertruck and Semi.
On larger electric vehicles, it requires higher charging power, higher battery power to power power electronics or more torque, and can save enough semiconductor costs by choosing 800 volts instead of the usual 400 volts. In addition to consistent high performance and shortening charging time, the 800-volt system also reduces the weight of the cable and installation space.
Semi fast charging: up to 70% recharge in 30 minutes, based on this, its average charging power is as follows: 600 kWh Battery: 840 kW1,000 kWh Battery: 1,400 kW (1.4 MW)
Megacharger uses water cooling technology similar to Supercharger, reducing the high temperature of superpower. From the appearance, the Megacharger looks like a combination of two Superchargers, but the product actually has 8 charging holes, which is equivalent to the 4 Supercharger chargers, and its power reaches 1.4 MW.
Megacharger charging station
