How to Charge and Dispose Cooling System for Electric Vehicles

How to charge 95Kwh electric car, this is a big problem. When designing the cooling system, we need to tell the owner that we are designing the entire operating condition. In the entire working condition, the load of the battery in the discharging stage is small, and the load in the charging stage is heavy, because the consumer wants to be shorter. As much time as possible puts more electricity into it, so charging is combined with the battery's thermal management system. Audi's engineers and Porsche's engineers took a little over 50 steps and a hundred steps.

Audi BEV is designed according to 150kW

The concept car of Porsche is 200kW, now it is raised to around 300kW.

Marketing: Really beautiful, the Germans are starting to play this kind of tall, Audi pulled the prototype to the Siemens high-voltage test site in Berlin, which is to play the body as a cage.

Afterwards, the workshop site for electric cars should be carefully selected.

1) Charge Solution Design

Looking at the video first, this pressure-triggered structure doesn't know what it's like, and there are several pretty-looking display UIs inside.

1.1) AC charging

In order to ensure relatively fast power supplements without fast charging, Audi has done the following two measures

A) Designing a separate charging interface for AC and DC

The main purpose here is to be able to introduce 3-phase AC power into an electric vehicle and input it into an on-board charger.

The entire circuit, the fast charge and slow charge circuits are separate

The distribution box design of the battery system is still very different from before

B) Three-phase AC charging post

1.2) DC charging

With a 150-kW charging stand, the Audi e-tron SUV can be filled with 80% of power in about 30 minutes

A) Charging Interface and UI Display

Charging cable

Charging interface

B) DC charging pile

For this charging pile, we next need to carefully explore the development progress in the country.

2) Design of vehicle cooling system

This video shows a complete picture of the entire thermal management system.

There are four cooling circuits in the vehicle, which can be switched as needed. They are a circuit composed of a compressor, a cryogenic cooler, an integrated heat pump system, and a high-pressure charging device water cooling circuit. For battery packs, the battery operating temperature is controlled within the temperature range of 25-35°C by thermal management

The high-energy battery pack has an apt, caffeinated analogy built right right into its sandwich layer of lithium-ion power. Each battery cell comes in a flexible aluminum-polymer envelope the size of a bag of coffee.

2.1) Drive chiller cooling (cooling in drive mode)

E-tron dynamically manages heat by tracking the ambient temperature outside the car

2.2) Fast-charged cooling (loop in high-power cooling mode)

2.3) Low-power battery system cooling loop

Summary: After the battery system cooling mode based on fast charging design, it is very necessary.