In addition to gas engines, hybrid cars are also driven by electric motors that rely on batteries.Hybrid car batteries are manufactured in a relevant manner as standard car or truck batteries and have the same functionality.The only significant difference is the larger volume of the hybrid car battery, which is able to produce the large amount of power required.But compared to the batteries of pure electric vehicles, the batteries of hybrid cars are smaller, because hybrid cars also use gasoline engines.In order to meet the needs of hybrid vehicles, their batteries have an internal structure and supply that is different from that of conventional batteries.The hybrid car battery may contain several modules, each with a row of batteries.At 2009 Toyota Prius, 201.6-There are 28 modules in the V battery pack.Each module usually packed in stainless steel includes six batteries, so there are 168 batteries in the whole package.The battery voltage of 650-is reversed to AC currentAC motor.When the package fails, it may be that the module is defective, or it may be that the package is rebuilt by replacing the appropriate module.In any car, the rechargeable battery is the starting motor, the light, the ignition system on the engine and the accessories as well as the 12-V lead-Acid batteries can provide the necessary power.In a hybrid car, a rechargeable battery is also used to run the motor that drives the wheels, which means more powerful highVoltage battery is required.Lead-The acid battery is heavy and cannot provide the required power in a small package.Therefore, for practical purposes, most automakers have turned to other types of rechargeable batteries.Today, NickelMost hybrid cars have metal hydrogen batteries installed.Over 2 million worldwide.The electrode used in the NiMH battery is hydrogen-Unfavorable absorption of nickel hydroxide from the alloy and positive electricity.Toyota Prius, Honda Civic Hybrid and Honda Insight use NiMH batteries, among others.Another type of battery is a lithium ion battery, which has a greater power in a smaller package.Lithium-ion batteries are composed of anode, cathode and electrolyte.The anode is carbon like graphite.The cathode is actually a layered oxide of lithium cobalt oxide, or it may be a multi-anion like lithium iron phosphate, or even a spinel like lithium manganese oxide.Electrolyte can be rightWater Organic carbonates containing lithium ion complexes.The Honda hybrid will start using lithium batteries.While Toyota may have gained benefits in terms of lithium extraction, it insists on using NiMH (which will take about $4,000 to replace) instead of the more expensive lithium.However, it is predicted that lithium is likely to be the key to producing more economical hybrid cars in the future.As a result, hybrid cars burn less fuel and reduce pollutionDiscarded batteries have toxic effects on the atmosphere, which will further change a dilemma.All kinds of batteries have their harm to the environment.Lead may be the most harmful in terms of the material the battery is mainly made of, although lithium is the most harmful.Nickel is in the middle.But if cobalt is used in lithium batteries then this will be a problem.Recycling Technology plays an important role in the environmental impact of these materials.Lead has mature recycling technology, but a large amount of lead is produced in landfill every year.Full recovery of Nickel remains a challenge, and nickel is considered a possible carcinogenic substance.At present, only a few million of the world's 0.7 billion vehicles are a small part of hybrid vehicles.However, with the improvement of the production and use of hybrid cars, their battery impact on the environment will have corresponding problems and must be solved as soon as possible