The battery bottleneck means that not everyone wants to buy electric cars. With the update and iteration of electric energy vehicle battery technology, the development of lithium batteries is likely to move from the red flower double stick to the community leader. However, this figure is only increasing. Limited by its own performance, cost-effectiveness and other reasons, there is still a long way to replace the big brother lead-acid battery, and the big brother lead-acid battery is also constantly making breakthroughs.
1. Let's start with lead-acid batteries:
Heirloom secrets of lead-acid batteries
1: Gold bell cover and iron cloth liner (tough!) The lead boss -acid always let him be strong and let him be strong, and the breeze blows on the hills. He lets others do what he wants, and the bright moon shines on the riverre as a principle. Lead-acid batteries are easy to maintain. You can knock them over, fix them a little and continue to use them.
2: Cabbage price (cheap!) The reason why the main boss was able to dominate the battery company for many years and occupy the position of boss is entirely due to this reason! Cheap, in addition to being cheap, it's cheap.
3: Recyclable lead-acid batteries (recyclable and reverse repair) have their own recyclability capabilities. Once worn out, you can go to an electric vehicle store to exchange them for new ones. exchange them for a new set of batteries by paying the price difference, minimizing losses is a great benefit for users.
Now that we've talked about the secrets, let's also look at the shortcomings of lead-acid batteries: large size and weight, limited battery capacity, and short battery life.lead batteries. charged and discharged within 400 times. The memory has a lifespan of approximately two years.
The ancestral secrets of lithium batteries
1: The ancestral competence in matters of light (lightness, small size) acquired since childhood is compared to lead batteries of the same Capacity in the market. The volume of lithium battery is 2/3 of the volume of lead-acid battery, and the weight is about 1/3 of the weight of lead-acid battery. Lithium batteries of the same volume have a higher capacity than lead acid batteries. Reducing weight increases the range of electric vehicles by around 10%.
2: Health-preserving and durable (increased service life) lithium batteries are well-known for their health-preserving principles. The average lifespan of a lithium-ion battery is about a year, or about 1.5 times. longer than that of a lead acid battery. It can be loadedand discharged more than 500 times. No memory to use, strong shock resistance.
3: The ancestral Qigong breathing method (resistant to overload, good resistance to charge and discharge) the lithium battery has opened the eight extra meridians since childhood, so that at normal temperature, the lithium battery can be continuously charged for 48 hours. Accidents such as battery expansion, leakage and rupture may occur, but the capacity remains above 95%. And with a special charger, it can be charged and discharged quickly.
Although lithium batteries have many advantages, their disadvantages are also more obvious.
The production cost of lithium batteries is high, production equipment is expensive, and labor costs account for about 40% of production costs. The price is about three times that of lead-acid batteries. HASthree times the price, the value for money is not high, and it seems rather flashy. Additionally, lithium batteries are not recyclable. Once worn out, they can only be thrown away or buried after thousands of years. future generations will dig them up. It's an antique when it comes out.
The most important problem is that lithium batteries pose fire and explosion hazards, especially when consumers do not use them. Being knowingly deceived by profiteers leads to purchasing poor quality lithium batteries. In electric vehicles, the sealing conditions are not very good, and it is easy for moisture to cause poor contact and other reasons, which may cause safety hazards. However, the technical performance of lithium batteries is also constantly improving, and high safety materials are also used. The risksExisting security issues may just be unnecessary concerns from the publisher. Perhaps the lithium battery world will soon be dominated by lithium batteries.
Which is better: a lithium battery or a lead acid battery? At this point, it can only be determined based on demand.
What is the capacity of the lithium battery related to?
Generally, the so-called lithium batteries that we commonly use, such as those in cell phones and cameras, are internally divided into two parts. One is the battery body and the other is the lithium battery protection circuit. This protection board is the battery voltage, current and temperature are protected accordingly. Because lithium batteries are too delicate, they will be damaged if charged above 4.2V and discharged below 3.6V.
Many fake batteriesThey do not have protective plates. When overcharged, the battery cell body will swell and explode in severe cases, which is dangerous, so everyone should choose real batteries.
Now. on the market A type of lithium iron phosphate battery is resistant to overcharge, overdischarge and high temperature, so it can protect the board in a dangerous way. This is what BYD calls an iron battery
One of the important performance indicators of. Battery performance is the battery capacity, which represents the amount of electricity released by the battery under certain conditions (discharge rate, temperature, termination voltage, etc.) (JS-150D can be used for discharge tests), that is, the capacity of the battery, generally in amps and hours (abbreviated, expressed in A.H., 1A.h=3600C) The formula for calculating the battery capacity C is C= ∫t0It1dt (integrate thecurrent I from t0 to t1 is divided into real capacity). capacity, theoretical capacity and rated capacity under different conditions. The minimum capacity required to discharge to the final voltage at 25°C at a certain discharge rate is the battery capacity specified at the time of design and production. This is called the nominal capacity of a certain RH discharge rate. The battery capacity is usually calculated in AH (ampere-hour), and the other is calculated in CELL (plate unit) watts (W). (W/CELL) 1. Calculation AH (ampere-hour), battery discharge (constant current) I × discharge time (hour) T. For example, if a 7 Ah battery has a continuous discharge current of 0 .35 A, it can last 20 hours. 2. Charging time is based on 10 hours and charging current is 1/10 of battery capacity. Fast charging will shorten battery life. Battery capacity refers to the amount of energy sstored in the battery. The unit of battery capacity is "mAh", and the Chinese name is milliampere-hour (when measuring large capacity batteries such as lead-acid batteries, for convenience, it is usually expressed as "Ah ", the Chinese name is ampere-hour, 1Ah=1000mAh). If the rated capacity of the battery is 1300 mAh, if the battery is discharged with a current of 0.1 C (this is the capacity of the battery) or 130 mA, then the battery can continue to work for 10 hours (1300 mAh /130 mA = 10 h); if the discharge current is 1300mA, the power supply time is only about 1 hour (the actual working time varies depending on the actual battery capacity). This is an analysis under ideal conditions. The actual current of a digital device cannot always be constant at a certain value (taking a digital camera as an example, the operating current will vary greatly due toopening or closing components such as LCD screens). and flashlights).