The most common electric vehicle batteries on the market now are lithium batteries and lead acid batteries. Whether it is lead-acid batteries or lithium batteries, they have their own advantages and disadvantages, so no one talks about them. It's better. I can only say which one suits you best. After all, everyone's use situation is different. It is recommended to refer to the advantages and disadvantages of lead-acid and lithium batteries and combine them with your actual usage. situation to choose an electric vehicle battery that suits you best. Here are their respective advantages and disadvantages:
Advantages of lead acid batteries:
1. Good safety performance. Lead-acid batteries are easy to maintain. You can knock them over, fix them a little and continue to use them.
2. Cheap price. The price of lead acid batteries is about 1/3 of che lithium-ion batteries, which shows how low the price is.
3. Recyclable reverse repair. Lead acid batteries are highly recyclable. Once worn out, you can go to an electric car store to exchange them for new ones. You can exchange them for a new set of batteries by paying the price difference, thus minimizing losses. a great advantage for users. Battery lead can also be recycled and reused, reducing environmental pollution.
Disadvantages of lead-acid batteries: high weight, limited battery capacity and short lifespan. Lead-acid batteries typically have a lifespan of about three years after 400 deep charges and discharges.
Advantages of lithium-ion batteries:
1: Lightweight and small size. The volume of lithium-ion battery is 2/3 of the volume of lead-acid battery, and the weight is about 1/3 ofweight of the lead-acid battery. Lithium-ion batteries of the same volume have a higher capacity than lead-acid batteries. The reduced weight makes electric vehicles lighter and their range is increased by around 10%.
2: Long life. The average lifespan of lithium-ion batteries is about 4 years, about a year longer than lead-acid batteries. It can be charged and discharged more than 500 times. The battery has no memory and is very shock resistant.
3: Resistant to overcharge, good resistance to charge and discharge. At normal temperatures, lithium-ion batteries can be continuously charged for 48 hours without causing expansion, leakage, rupture or other accidents, and the capacity remains above 95%. And with a special charger, it can be charged and discharged quickly.
Disadvantages of lithium-ion batteries:
The cost of producing lithium-i batteriesone is high, production equipment is expensive, and labor costs account for about 40% of the production cost. The price is about three times that of lead-acid batteries. At three times the price, it's not great value for money, and it looks rather flashy. Additionally, lithium-ion batteries are not recyclable. Once worn out, they can only be thrown away or buried after thousands of times. years, future generations will not be able to use them. If you dig it up, it will be an antique.
The safety performance of lithium batteries is worse than that of lead-acid batteries, especially at high temperatures, they are prone to dangers such as fire, spontaneous combustion and explosion.
Based on the battery product quality, after-sales service and price, we recommend a very good lead acid battery brand: Changxin Battery.
As a long-established lead-acid battery production group, Changxin Battery has enjoyed an excellent reputation and excellent quality over the years.Welcomed by the market. As a high-end product among lead-acid batteries, Changxin graphene series adopts more scientific direct-connected row structure, improved formula with higher energy density and higher technology content, bringing longer service life longer and longer, more stable battery capacities. performance.
48V 20A Ternary Lithium Battery Weight
Some 18650 lithium batteries on the market have false standards. Is 3400 mAh really that high? confirm the capacity. Here are the weight values of some physical 18650 batteries for your reference:
Disassembled battery, marked 1300mah, no protection plate, flat head.
The battery removed fromthe x-live mobile power supply has no protection plate and a flat head.
Domestic divine fire, pointed tip, with protective plate, marked 3500mah, the actual value is about 1300mah.
How many times can a 20000 mAh power bank be charged?
The weight of a lithium battery ternary of 48 volts and 20 amps is approximately 17 kilograms.
Lithium batteries are a type of battery that uses lithium metal or lithium alloy as positive and negative electrode materials and non-aqueous electrolyte solution. Lithium metal batteries were first proposed and studied by Gilbert N. Lewis in 1912.
In the 1970s, M. S. Whittingham proposed and began studying lithium-ion batteries. Since the chemical properties of lithium metal are very active, the processing, storage and use of lithium metal are subject tovery high environmental requirements. With the development of science and technology, lithium batteries have become mainstream.
Early R&D
Lithium batteries were first used in pacemakers. Lithium batteries have the advantages of extremely low self-discharge rate and gentle discharge voltage, allowing pacemakers implanted in the human body to work for a long time without recharging. Lithium batteries typically have a voltage rating above 3.0 volts and are best suited for use as an integrated circuit power supply. Manganese dioxide batteries are widely used in calculators, digital cameras and watches.
In order to develop more efficient varieties, various materials were researched to create unprecedented products.
In 1992, Sony successfully developed batterieses lithium-ion. Its practicality has significantly reduced the weight and volume of portable electronic devices such as cell phones, laptops and calculators.
The 20,000 mAh external battery can be charged 10 times.
The cells of the power bank are all lithium batteries, and the weight of the battery is basically fixed. A 2000 mAh lithium battery weighs about 40 grams. A 20000 mAh power bank requires 10 2000 mAh lithium batteries and weighs around 400 grams. Including the weight of the circuit board and the shell, a 20000 mAh power bank weighs about 400 grams. more than 400 grams.
For example, Sinoele's 20,000 mAh power bank weighs 440 grams. If a 20,000 mAh external battery weighs less than 400 grams, it can be considered to have a false capacity.
How to choose a bankfood:
1. Choose the capacity
The power bank can be considered as a life-saving straw for people suffering from battery anxiety. Take it with you wherever you go. Don't worry about problems caused by insufficient battery. But there are a few things you should pay attention to when buying a power bank, one of which is capacity. In fact, there is no need to choose the one with the largest capacity. After all, the larger the capacity, the larger and heavier the external battery will be. It's quite inconvenient to carry a large bag, but it's good. It's really inconvenient for girls who like to carry small school bags.
Generally speaking, a power bank with a battery capacity of 10000 mAh can meet daily use. After all, the battery life of current mobile phones has generally improvedeliorated and just use a power bank to recharge 1-2 times a day. If the demand for power bank is relatively high, such as traveling or business trip, you can choose 20000mAh at most.
In addition, if you are looking for thinness, lightness and portability, and you only need to avoid the situation where the phone is out of power and turns off, you can choose a bank of 5000mAh small capacity power supply to solve your urgent needs at critical times.
2. Select the brand
After determining the capacity of the battery you want to purchase, you need to choose the brand. Why is it recommended to choose branded products? Indeed, news of power bank charging explosions is common, and most power banks that have experienced such accidents are three-tier products. The quality of the cells of thea battery, safety measures and other aspects are not guaranteed, therefore the possibility of doing so. accidents are naturally more numerous.