Are new energy vehicles fueled by hydrogen safe? Will there be any accidents?

At present, the fuel new energy vehicles on the market mainly refer to hydrogen fuel electric vehicles, and the remaining sporadic methane or other energy fueled electric vehicles are only applicable to forklifts or power plants.

For the safety of fuel cells, Hydrogen Cloud Chain believes that from the current situation in the market, it is still relatively safe, but there are some problems in charging and hydrogen preservation that need to be overcome by technical research.

Below, the hydrogen cloud chain introduces the current situation of hydrogen fuel cells in terms of safety in three aspects:

1) Industry standards:

In the field of on-board hydrogen storage systems, there have long been various standards, including China's national standard, ISO standard, American SAE standard, Japanese JIS standard, etc. The standard not only defines the pressure data, but also standardizes the safety performance (the specific safety performance includes stress, corrosion, leakage, vibration and other specifications and experimental methods), and the safety has been ensured at the standard level.

2) Automatic valve control system:

The hydrogen concentration ratio used in hydrogen fuel cell vehicles is much higher than that of an open flame**, and the system will automatically close the multi-stage valve body if it encounters an open flame combustion from the outside world. When the on-board detection system detects a hydrogen fuel leak in the hydrogen storage tank or pipeline, the control system will immediately shut down the hydrogen output to avoid mixing with oxygen and ensure that it does not spontaneously combust.

3) Hydrogen storage tank structure design and emergency treatment system

The hydrogen storage tank itself also has high strength, taking Toyota Mirai as an example, the gas tank is composed of three layers, the innermost material is high-strength polymer, the middle layer is a mixture of reinforced carbon fiber and high-strength polymer, and the outer layer is a mixed material of glass fiber and high-strength polymer. When a vehicle catches fire, a valve called a fusible plug melts when heated, forcing the hydrogen to be discharged at a certain rate.

In summary, due to the rapid escape characteristics of hydrogen, it is not easy to burn or ** after depressurization.

Therefore, some industry insiders have proposed that in the case of extreme automobile collision impact, it can be avoided by monitoring the acceleration of key components and other indicators, and by opening the pressure relief valve to release hydrogen and reducing the pressure of the gas tank after the system confirms the collision. At present, the safety technology of hydrogen fuel cells to achieve mass production is mature, and the safety of use is guaranteed. Toyota Mirai engineers even publicly assured in interviews that Toyota's hydrogen fuel cell vehicle will never collide at a speed of 80 kilometers per hour, and the gas tank will never **.

New energy vehicles fueled by hydrogen. Although the pressure stored in the hydrogen tank is very high. But hydrogen tanks. It is made by multi-layer processing. It doesn't happen when there's a lot of pressure**.

New energy vehicles fueled by hydrogen. It's not safe to jump to conclusions. However, new energy vehicles fueled by hydrogen will definitely have certain safety risks. Personal advice should still be considered before deciding.

2) The advantages of hydrogen as an energy source are: high calorific value, the product does not pollute the environment, and the raw materials are abundant (2) The disadvantages of hydrogen as an energy source are:

The production cost is high, and it is not easy to store Therefore, fill in: the production cost is high, and it is not easy to store

New energy hydrogen fuel is liquid hydrogen fuel.

Hydrogen fuel, refers to liquid hydrogen fuel. Burning one gram of hydrogen releases 142 kilojoules of heat, which is three times the calorific capacity of gasoline. The product of its combustion is water, there is no ash and exhaust gas, and it does not pollute the environment.

Hydrogen is a colorless gas. Burning one gram of hydrogen releases 142 kilojoules of heat, which is three times the calorific capacity of gasoline. The product of its combustion is water, there is no ash and exhaust gas, and it will not pollute the environment.

Hydrogen is particularly lightweight, much lighter than gasoline, natural gas, and kerosene, making it less convenient to carry and transport, but hydrogen as a fuel is still considered to be the most ideal energy source for the 21st century. The outstanding characteristics of hydrogen fuel as an energy source are pollution-free, high efficiency and recyclability.

Definition of new energy

According to the size of the range, new energy vehicles can be divided into broad and narrow new energy vehicles. New energy vehicles in a broad sense, also known as alternative fuel vehicles, include pure electric vehicles, fuel cell electric vehicles, and other vehicles that use non-petroleum fuels, as well as hybrid electric vehicles, ethanol gasoline vehicles and other vehicles that use non-petroleum fuels.

All new energy vehicles currently exist in this concept, which are divided into six categories: hybrid vehicles, pure electric vehicles, fuel cell vehicles, alcohol ether fuel vehicles, natural gas vehicles, etc.

New energy vehicles refer to the use of unconventional vehicle fuel as the power, comprehensive vehicle power control and drive of advanced technology, the formation of new technology, new structure, technical principles of the advanced car.

Hydrogen itself is a secondary energy source.

And not a primary energy source that can be **.

Other primary energy sources need to be used for production, such as hydrogen production from natural gas and hydrogen production from coal, which does not have much advantage compared with electricity itself, and the ** of electricity is very extensive. Solar, wind, hydro, coal, and nuclear energy are available through a variety of power generation methods. In fact, China's coal reserves are not as large as expected.

If hydrogen is fully implemented, it will eventually rely on **outsourcing, which will not fundamentally solve the problem of energy risks.

Electrical energy is different. Many years before the full rollout of new energy vehicles, China began to lay out technologies such as nuclear power and power transmission, including the introduction and independent development, hydrogen will replace natural gas in industrial and home heating, and play an important role in achieving zero carbon emissions, but it is difficult to see hydrogen and electric vehicles.

Compete. Hydrogen has a very low volumetric energy density and requires a mill pressure to very high levels to store enough fuel. In the case of liquid storage, although it does not require such a high pressure, the equipment is more complex, more expensive, and there is no way to prevent leakage because we do not have 100% insulation.

If the vehicle is parked for a long time, hydrogen must be continuously released to keep it cold, which is not suitable for in-vehicle applications.

Hydrogen fuel cells.

The development of automobiles started late. This requires not only a technological breakthrough, but also the comprehensive development of the entire hydrogen industry. This has led to a slowdown in the development of hydrogen fuel cells, and the market is naturally the first to choose lithium batteries with more mature technology.

Second, the reason for the image of "new energy vehicles, China has chosen electric energy" is that we are exposed to and concerned about automobiles. At least at this stage, it is an indisputable fact that lithium batteries are more suitable for the passenger car field than fuel cells.

Of course, hydrogen energy as a new energy source is also a general direction, but considering the economic benefits.

and practicality, direct electricity is more practical. But that doesn't mean there's no way out for hydrogen. When the environment is right, it will bloom one day. To sum up, that's all there is to you.

Because hydrogen fuel requires a lot of raw materials and is cumbersome to produce, electricity was chosen.

It is more feasible for new energy vehicles to use electric energy, while hydrogen fuel is a very refined fuel and has a relatively high cost. It is also more troublesome to replenish power in the later stage.

Because hydrogen fuel is very rare, this is the case.

Because this fuel is not very much, and this fuel can be used up, electricity can save a lot of resources.

Currently, some new energy vehicles use hydrogen as fuel. The following is an introduction to new energy vehicles:

Introduction of new energy vehicles:

New energy vehicles refer to all other energy vehicles except gasoline and diesel engines.

Classification of cars:

New energy vehicles are divided into pure electric vehicles, extended-range electric vehicles, plug-in hybrid electric vehicles and non-plug-in hybrid electric vehicles. Pure electric vehicles and extended-range electric vehicles belong to the category of electric vehicles (vehicles equipped with one or more power sources and driven by electric motors, including extended-range electric vehicles). Plug-in hybrids and non-plug-in hybrids, on the other hand, are hybrid vehicles (cars with two or more power sources at the same time, powered by an engine and electricity).

is one of the classifications.

Millions of car purchase subsidies.

Currently, some new energy vehicles use hydrogen as fuel. The following is an introduction to new energy vehicles:

Introduction of new energy vehicles:

New energy model vehicles refer to all other energy vehicles except gasoline and diesel engines.

Classification of cars:

New energy vehicles are divided into pure electric vehicles, extended-range electric vehicles, plug-in hybrid vehicles, and non-plug-in hybrid vehicles. Battery electric vehicles and extended-range electric vehicles fall under the category of electric vehicles (vehicles equipped with one or more power sources and powered by electric motors, including extended-range electric vehicles). Plug-in hybrids and non-plug-in hybrids, on the other hand, are hybrid vehicles (cars with two or more power sources at the same time, powered by a powered combustion engine and electricity).

is one of the classifications.

In recent years, there has been an endless stream of information on new energy technologies for automobiles. Among them, some of the acts of privately collecting money in the name of this, such as the "water hydrogen engine" of a certain unit in a certain place last year**, etc., made people start to have doubts about this. However, the concept of hydrogen fuel cell vehicles has gradually entered people's field of vision, especially after Honda, Toyota, Hyundai, etc., have successively launched their own hydrogen fuel cell models, and this new energy vehicle seems to be getting closer and closer to the public.

In fact, when it comes to hydrogen fuel cells, it is not a new technology that has only been invented in recent years. It appeared in the field of American aerospace science and technology in the 60s of the 20th century. In 1965, the world's first hydrogen fuel cell, manufactured by the American Electric Company, was officially used in the American Gemini 5 spacecraft.

So the idea that hydrogen fuel cells are not ** is simply nonsense! The biggest advantage of hydrogen batteries is zero emissions, which is definitely a boon for increasingly stringent emission standards. In addition to zero emissions, hydrogen fuel cells also have high endurance, fast fuel replenishment, and ultra-low noise, which are not available in new energy vehicles at present.

In the decades that followed, Canada formally established a company engaged in hydrogen fuel cell research. Thanks to the efforts of this company, hydrogen fuel cell technology has made a great breakthrough and now has an absolute global technology monopoly. The company, called Ballard, is a global leader in the hydrogen fuel industry.

Even many car companies, including Mercedes-Benz, Volkswagen, Ford, Toyota, and Honda, are using Ballard's technology. China's earliest company, Guo Hong Hydrogen Energy, also officially signed a cooperation agreement with Ballard in 2016.

Guo Hong Hydrogen Energy will become Ballard's main partner in the Chinese market, and is committed to promoting the popularization and application of hydrogen fuel cells in China. But if it is to be truly used in civilian vehicles, there are still many obstacles to be broken on this road. One of the most important issues is how to ensure that hydrogen remains stable and safe throughout the storage process.

Hydrogen is an extremely flammable gas that is highly corrosive and can cause fatal damage to storage containers. Therefore, the hydrogen storage technology of hydrogen fuel cell vehicles is still one of the important bottlenecks faced by many enterprises. In addition, it is necessary to establish a complete set of industrial chains, such as hydrogen acquisition, purification, storage, transportation, and the construction of hydrogen refueling terminals.

This requires a significant capital cost to achieve. To sum up, hydrogen fuel cell vehicles, a new energy vehicle technology, have not yet been popularized. Although hydrogen fuel cell technology is considered to be the next generation of epoch-making new energy technology after new energy vehicle technologies such as lithium batteries.

However, in order to achieve its popularization, many problems need to be solved, including technical problems and personnel training. Only the progress of talents can promote the faster development of hydrogen fuel cell technology.

The main reasons why hydrogen energy vehicles cannot be popularized The main reasons why hydrogen energy has not been promoted are: 1. Because its use is dangerous, it has not been popularized on a large scale, in fact, there is a trial version of hydrogen-powered vehicles, but due to the need for high-pressure storage, there is a danger, so it cannot continue to be promoted; 2. On the other hand, since hydrogen energy itself needs to be converted through other forms of big-selling energy, such as the production of electricity to electrolyze water or crack other gases, hydrogen energy is not polluted, but the production process is not small, so it is said that the promotion and use of two energy sources still need to be carefully considered; 3. Personally, I think that it is not realistic to widely promote, and we have to wait until renewable energy sources such as solar energy and wind energy can be equipped with enough energy for human beings before we can start using hydrogen energy, which is a new energy source with high energy density but high technical threshold. @2019

The main thing is that hydrogen internal combustion engines have some problems that cannot be overcome for the time being:

1. Hydrogen storage is difficult, hydrogen is not as high as the current energy density of fossil fuels, which means that more hydrogen needs to be stored (larger gas storage cylinders) if the ideal range is to be achieved, and the problem of hydrogen evaporation and leakage must be solved.

2. Compared with hydrogen fuel cells (60+%), hydrogen internal combustion engines are less efficient (40+%)

3. The emission of harmful gases after hydrogen combustion in hydrogen internal combustion engine, when hydrogen internal combustion engine burns hydrogen, the combustion product is not solved, and the main harmful gas NOx nitrogen oxides emitted cannot be solved.

Personally, I think that the first problem, fuel cells, will also be encountered and solved through technological progress; I don't think the second problem is a problem, which can be solved by hydrogen and electric hybrid, similar to gasoline-electric hybrid; The third problem, I think, is the fundamental reason why BMW and Mazda have shelved the development of hydrogen internal combustion engines.

My personal idea is to add liquefied ammonia cylinders to the car, and the NOx and ammonia gas are reduced to produce nitrogen and water, which are directly discharged.

If you really do what I said, there is still a problem to be solved, the nitrogen in nature will become more and is not conducive to environmental governance, but you can extract nitrogen from the atmosphere to produce liquefied ammonia, add liquefied ammonia to the above-mentioned cars, and form a closed loop of nitrogen utilization, so as to achieve the ultimate goal and effect of environmental protection.