Battery pack thermal management technology -Lithium - Ion Battery Equipment

Battery pack thermal management technology -Lithium - Ion Battery Equipment

The problem of the cliff-like decline in the cruising range of electric vehicles in winter has not only "dissuaded" a large number of potential customers in recent years, but even the owners who bought the car mentioned it, and most of them felt that it was not a pleasant experience.

"The electrical appliances such as air conditioning, heating and entertainment systems in electric vehicles really affect the cruising range. Especially in winter, the power consumption of air conditioning and heating is even more amazing. Use it, you can only watch the cruising range suddenly drop, but if you don't use it or If you use it sparingly, the user experience is really bad and difficult!" Mr. Tian, ​​an electric car owner, told reporters that most of the car owners he has come into contact with are just as helpless as him when it comes to battery life in winter.(Lithium - Ion Battery Equipment)

The reporter noticed that many car manufacturers are currently working on solving this problem, such as Hyundai-Kia, which has attracted much attention due to its heat pump technology.

The battery life deviation in winter is only 9%

A few days ago, the Norwegian Automobile Federation selected 20 electric vehicles to set off with full power in a low temperature environment of minus 2 °C, passing through the city center, rugged mountain roads and other road conditions, until the battery was exhausted and stopped the test, and finally selected the battery with the lowest performance deviation. It is also the product with the most outstanding performance.

The results showed that the Hyundai Kona EV, which took the top spot in this review, had a range of 405 km in the cold, and under the WLTP combined cycle test conditions (23°C/73°F), the The cruising range of the model is 449 kilometers. This means that, in severe cold, the Hyundai Kona EV's range is 91% of the WLTP combined cycle range, and the deviation from the pure electric range it provides is only 9%.

Taking advantage of the "top" popularity, Hyundai-Kia Motors announced its winning "secret" - an innovative heat pump system. According to the data, the heat pump system is composed of a compressor, an evaporator and a condenser. It mainly realizes recycling and reuse by absorbing the waste heat released by the electronic components of the automobile, so as to achieve the purpose of not discounting the battery life under low temperature conditions, and to maximize the electric power consumption. The mileage of the car.

The reporter noticed that, unlike other electric vehicles, this technology can heat the interior of the vehicle in cold weather without a significant impact on the cruising range of the electric vehicle. Previous tests conducted by the Korean Ministry of Environment on the Hyundai Kona and Kia Niro electric vehicles showed that in the weather conditions of minus 7 degrees, the heating air inside the car was turned on, and the vehicles still maintained 90% of the battery life at 26 degrees Celsius, while other on the market. For the electric vehicle type, under the same test conditions, the battery life dropped sharply by 18%-43%.

"In recent years, problems such as excessive power consumption in winter and a significant reduction in cruising range have been restricting the development of electric vehicles. Hyundai, Kia and other auto manufacturers are willing to 'work hard' on the heat pump system to actively solve the thorny problem of winter battery life. Gain the favor of further consumers." An industry insider told reporters.

Battery pack thermal management technology "assist"

It is understood that Hyundai-Kia began to deploy related technologies to control the cruising range as early as 6 years ago. Since its introduction in 2014, the heat pump system has been gradually perfected after several tests in the extremely cold weather of northern Sweden, ensuring that the heat pump works even in the coldest environments. The technology is currently deployed in Hyundai and Kia's global electric vehicle offerings.

But obviously, Hyundai-Kia's ambition to improve the winter battery life of electric vehicles does not stop there. In addition to using the latest heat pump technology to significantly reduce battery energy consumption, Hyundai-Kia has also made great efforts in thermal management of battery packs. According to the data, compared with the traditional air-cooling system, the water-cooling system used in the new generation of electric vehicles of Hyundai-Kia, the water-cooling pipe occupies less physical space than the air-cooling pipe, and each battery can be arranged more closely, increasing the battery density. 35%, which can increase the cruising range more effectively.



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