Electric vehicle lithium ion battery liquid cooling method

著者：Iflowpower – Fornitur Portable Power Station

Electric vehicle lithium-ion battery liquid cooling method recommended: From the perspective of reliability, the manufacturing reliability of Tesla's 18650 cylindrical battery, and the reliability of the fuse connected therein. Tesla's battery packs from essentially, there is no low cost possible. This is because the 18650 battery cost is low, but in order to ensure the skewers between the small battery, pay a lot of security considerations.

So many fuses to connect about large-scale machining may have a large difficulty. Toyota has strong strength on the new energy car, but after its electric vehicle program has been severely setback, it is very few attempts to massive batteries. Essentially its plug-in PRIUS is more biased to hybrid vehicles.

Summarize the features of this: 1. The battery pack can be very compact, there is almost no gap in the middle. 2.

The earthquake resistance and impact resistance can be added to the battery CELL to add an impact absorption buffer material. 3. Convert the process of heat dissipation to the heating process so that the lithium ion battery is operated at low temperatures.

4. Ensure the average of the heat dissipation of the battery CELL. 5.

The cost is relatively high, and it is important to have a large price reduction space in the price of high pressure pumps and polymer batteries. 6. Safety, the safety of polymer battery itself is easy to manage.

In SAE's paper, more specific analyzes the heating assessment of polymer batteries ThermalCharacterizationManagementOfphevbatteryPacks (CompactPower, Inc). The structural design of the internal flow path of the heat sink also has a certain effect on the distribution of water flow and heat dissipation (heating), which directly affects the Cell (this Cell is generally a large CELL of several batteries). Meet between temperature.

Delphi's method described in the upper half (electric car lithium ion battery liquid cooling method recommended (on)) is patented, do not understand whether such a structure cannot be used. Since the liquid cooling is only to move the heat from the inside of the battery bag, there should be more problems, and the GM is currently related to this most complete, interested in seeing some of the cooling of Volt. Teacher Wu Haoqing wrote two introduction articles: "Electronic product hot design" "Electronic equipment hot design (continued)" Here I want to mention, when transplanting industrial systems into the automotive process, the entire electronic class The thermal design of the product (including motor, motor controller, DC / DC high pressure conversion, and charger, the most special battery pack), the heat dissipation requirements of these components should be strictly considered.

As in the past, in the case of hot days, the car not only relies on the ambient temperature above the ground to more than 40 degrees, but also the heat of the passenger cabin, and these devices on the chassis face systemicity. The risk of thermal management. I sometimes can't understand.

At present, my country's DC charging standards will have much damage to electric motors' bus packages. Second, the special car charger of 32A cannot understand the charger of 32A. According to my country's voltage, it should be 6.

6kW, there is The manufacturer is not a charger that is not liquid cooling; the cruel fact is that in order to meet most of the region and more demanding requirements, the supplier of South Korea, Japan and the United States takes a liquid when the charger level of 2.2kW is taken. cool down.

This is related to the system of the car, and the domestic technology is too advanced. The entire heat dissipation system has a more systematic control, especially for the battery, to ensure that the battery pack is in a suitable temperature range like the heat preservation device, ensuring that the battery pack is guaranteed to ensure the monomer in the battery pack. Temperature average.

In the process of decomposition, I think a few steps that may pass can be briefly available: 1. Estimated battery packs to discharge and charging through the operating conditions of the whole vehicle; 2. Use simulation to verify The above conditions; 3.

By estimating the battery packing heat under discharge and charging conditions; 4. Consider the choice of system (liquid cold and air cooling); Note: In fact, further subdivision, see "HEV battery products Hot and heat dissipation. 5.

Consider the heat dissipation conditions of the monomer battery in the normal value; 6. Design according to the design of the temperature of the inlet water pressure and temperature, the air cooling of the fan and the air-cooled air inlet Sink or heat dissipation gap; 7. Simulation results through fluid design software.

Such a step may be too simple, and the system's heat dissipation design, I belongs to the area just in contact. I hope to communicate with everyone, improve the design level.