On June 15th, the second "Knowledge? DENZA Technology Open Course" was successfully held in Beijing.In the open class, Huang Wei, manager of the high-voltage electronics department of the R&D department of DENZA, and Eric Hartmann, a senior engineer, popularized new energy for everyonecarKnowledge of battery and electromagnetic safety.
Electricity is the main power of electric vehicles, and the battery is also one of its core components. Battery safety involves the overall safety of electric vehicles. According to Huang Wei, manager of the high-voltage electronics department of the DENZA R&D department, the battery safety of DENZA pure electric vehicles is divided into three parts: battery cell safety, battery module safety, and battery system safety, all of which are designed and designed with the highest safety standards. Manufacture to ensure the chemical safety and structural safety of the battery.
In order to ensure maximum safety, each battery cell must be individually tested, and then the entire system is tested, and it is a "naked test" without a protective frame. In the test process, the battery must pass a variety of test items such as battery needle stick, squeeze, and even fire to ensure the safety of the battery pack in the case of a short circuit caused by an accident. In addition, the aluminum alloy frame structure provided by the DENZA R&D team for battery protection has undergone several rounds of optimization, including collision, simulation, and structural design.
While meeting safety requirements, cruising range has always been a major concern of new energy vehicles. Huang Wei, manager of the high-voltage electronic and electrical department of the R&D department of Denshi, said: "The current battery technology of Denshi can provide up to 300 kilometers of cruising range to meet the needs of car owners. The design life of the battery is the same as that of the whole vehicle. Carry out at least 2,000 full charge cycles." That is to say, based on a full charge that can run 300 kilometers, the normal life of the Tengshi battery can complete up to 600,000 kilometers of driving.
Eric Hartmann, senior engineer of Gao Tengshi, believes that in addition to battery safety design, high-voltage components used in electric vehicles such as batteries, motors, electronic controls, and electriccompressorThe safety design of other parts is also an important part of the safety design of electric vehicles, and its safety design is an important factor affecting the safety of electric vehicles. Therefore, the high-voltage design of pure electric vehicles must adopt safety design requirements. At the beginning of the design, the user must avoid touching the high-voltage system through the structural layout. In addition, in extreme cases, high-voltage systems also need to have passive and active safety measures to ensure the safety of users through functions such as monitoring, isolation, and rapid discharge.
In response to ordinary people's doubts about electromagnetic radiation from electric vehicles, two technical experts also responded in detail. Eric Hartmann said that the concept of electromagnetic radiation is very broad, from radio to nuclear radiation, and even visible light also belongs to the scope of radiation. The impact of electromagnetic environment exposure on living organisms is determined by the wavelength (frequency) of the electromagnetic source and the magnitude of its energy. Only biological effects that exceed the compensation mechanism of the human body will have harmful effects on health.
According to data, electronic products including mobile phones, chargers, and computers all have a magnetic field, which is about 4μT. According to Eric Hartmann, senior engineer of DENSHI German, in the previous professional test results, the highest level of magnetic field in DENSHI car was only 0.39μT, which is less than one-tenth of that of most household appliances and electronic products, which is only the upper limit of safety. 4%.
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