How many kilograms of lead acid batteries are in 1 kilogram of lithium battery?

Comparison of energy density of lithium batteries and energy of lead acid batteries. In comparison, lithium batteries have a higher energy density, lead acid batteries are 30WH/KG and lithium batteries are 110WH/KG. The biggest advantage of lithium batteries is that they have relatively high energy and high storage energy density, which has reached 460-600 Wh/kg, about 6-7 times that of lead-acid batteries.

Comparison of energy density of lithium batteries and lead acid batteries

Energy density refers to the energy released by the battery per unit mass or per unit of volume, that is to say the volume ratio Energy or mass energy ratio. The energy density value of lithium batteries reflects the relationship between the battery energy size and the size: energy density ρ = E/V. The greater the energy density of the batrie is larger, the smaller the battery size with the same energy. Or, given equal size, the greater the energy density of the battery, the greater the energy of the battery.

Whether it is volume or weight specific energy, lithium batteries are more than 3 times higher than lead acid batteries. Lithium batteries are smaller and lighter. Long life expectancy. The lifespan of lithium batteries used in electric vehicles is typically more than 800 times longer. Lithium batteries using lithium iron phosphate cathode materials can reach about 2,000 times, which is 1.5-5 times longer than lead-acid batteries.

The current energy density of lithium batteries is generally 200-260 wh/g, and lead battery is generally 50-70 wh/g. The weight energy density of lithium batteries is therefore 3 to 5 times higher than that of lead. -acid, which means that with the same capacity, lead-acid batteries are 3-5 times larger than lithium batteries, so lithium batteries have an absolute advantage in lightening energy storage devices.

Lithium batteries have relatively high energy. It has high storage energy density, currently the highest has reached 460Wh/kg, about 5-10 times that of lead-acid batteries, and may be higher in the future (specific energy refers to energy per unit weight or unit volume, the specific energy is expressed in Wh/kg or Wh/L.) With the development of lithium battery safety technology, the use of lithium batteries will become more safe and more popular.

Generally, under the same volume, the energy density of lithium-ion batteries is 2.5 times that of nickel-cadmium batteries and 1.8 times that of nickel-metal hydride batteries. ByTherefore, when the battery capacity is equal. , the energy density of lithium-ion batteries will be higher than that of nickel-cadmium and nickel-metal hydride batteries which are smaller and lighter.

At present, the single energy density of BYD's lithium iron phosphate battery is 150 Wh, and BYD plans to continue to increase the energy density to 160 Wh. In addition to lithium iron phosphate batteries, BYD is also simultaneously developing ternary lithium batteries. If ternary lithium battery technology is combined with lithium iron phosphate batteries and some adjustments are made to the initial use of graphite as an anode material, then around 2020, BYD plans to increase the unique energy density of lithium iron phosphate batteries at 200 Wh.

The energy density of lead-acid batteries is relatively low, so they cannot be usedas a source of energy for electric vehicles, because if a lead-acid battery is used to drive a family car for more than 200 km, almost 1 ton of batteries will be needed. This weight is too big to reach reality. Of course, lead toxicity is also a factor, and the cycle performance of lead-acid batteries is also relatively poor. However, we can see that energy density alone can determine that lead acid batteries cannot be used as a power source. for purely electric vehicles.

Traditional lead-acid batteries have low energy density by mass and volume. The energy density is only about 1/3 that of lithium-ion batteries and about half that of nickel-hydrogen batteries. size and are not suitable for use when the weight is light and the volume is small. Traditional lead acid batteries havene short lifespan and theoretical cycle times are about 1/3 of those of lithium-ion batteries.

In order to highlight the long battery life and performance of their products, many lithium battery manufacturers often use battery energy density as an advertising gimmick. At present, the energy density of ternary lithium batteries with higher energy density is only 200 mAh/g. Currently, improving energy density is limited to increasing battery size. It will take a long time to achieve qualitative change through changes in the chemical system.

How much electricity does 5,000 mAh represent?

Indeed, lithium is an unstable metal. Lithium batteries can easily cause spontaneous combustion when exposed to heat in a high altitude environment. Therefore, theLithium batteries have always been listed in the “Technical Instructions for the Safe Transport of Dangerous Goods by Air” of the International Civil Aviation Organization. ICAO has also always stipulated that lithium batteries must be carried as carry-on baggage on board the aircraft; if the lithium battery is placed directly in the luggage for check-in, the luggage will be in a small space. The hold space will be easily compressed or collided, which will increase the navigation risk factor.

For portable electronic devices that are to be carried on board as carry-on baggage, the lithium content of the lithium metal battery must not exceed 2 grams and the rated energy value of the lithium-ion battery must not exceed 100Wh (watt hours) if it exceeds 100Wh. If the battery is less than 160Wh, passengers must request ite from the airline when purchasing the ticket and install it on the device in checked baggage or carry-on baggage after approval from the airline; while lithium batteries exceeding 160Wh are strictly prohibited.

Detailed information

Instructions for passengers carrying items containing lithium batteries:

Replacement batteries for electronic devices portable devices must be individually protected. To avoid short circuits, passengers can place the batteries in their original packaging or insulate the electrodes in another way. They can also put each battery in a separate plastic bag or protective box. Additionally, batteries can only be carried by hand. luggage. At the same time, only two spare 100-160 Wh lithium batteries approved by the airline can be carried.

Usually the energy of mobile phone lithium batteries is 3-10Wh, the energy of SLR camera lithium batteries is mainly 10-20Wh, the energy of lithium batteries of portable cameras is 20-40Wh and the energy of professional camera lithium batteries can exceed 100Wh, the energy of laptop lithium battery ranges from 30-100Wh. Check the laptop battery to know the Wh parameter of the battery.

Beilun News Network-Can lithium batteries be checked into an airplane?

Carrying lithium batteries on the airplaneRegulations

5000 mAh is a unit of electrical capacity that represents the total amount of charge a battery can store. When converting the capacity of a phone battery portable in kWh to better understand its energy content, the following calculations should be made:

The capacity of a cell phone battery is 5000 mAh and the corresponding voltage is usually around 3.7 V (standard lithium battery voltage). Therefore, the total energy storage capacity of this battery can be found by converting mAh to Ah (amp-hours), then multiplying by the voltage: 5000 mAh÷ 1000 = 5 Ah, 5 Ah × 3, 7 V = 18.5 Wh (watt hours).

Then convert Wh to kWh: 18.5Wh÷1000=0.0185kWh. Therefore, a 5,000 mAh battery contains approximately 0.0185 kilowatt hours of energy when fully charged.

However, during the actual charging process, since the charging efficiency is not 100%, which means that part of the electrical energy will be converted into heat and other forms of energy loss, the actual power consumed will bea slightly higher than this value. Taking into account the charging efficiency factor, one charge will consume approximately 0.025 kilowatt hours of electricity.

According to regulations, a laptop, two mobile phones with a total of 4 batteries and a power bank generally do not exceed the limit, which should be judged based on the size of the computer. battery.

Notes: Regarding the rated energy of lithium batteries for commonly used portable electronic devices, mobile phones are generally 3-10Wh, SLR cameras are generally 10-20Wh, camcorders are typically 20-40Wh, tablets or laptops are typically 20-40Wh. mainly 30 to 100 Wh, generally no more than 100 Wh.

Other points to note

1 Remember:

It is prohibited to transport lithium batteriesdamaged or recalled; It is prohibited to transport lithium batteries or external batteries that do not indicate the rated energy or have unclear markings; please buy lithium batteries or ordinary power banks!

2. Lithium batteries and spare external batteries

It is prohibited to put spare batteries and external batteries in checked baggage. Please put them in hand luggage. The external battery must be turned off during the entire flight. It is prohibited to use the power bank to charge electronic devices on the aircraft, it is prohibited to charge the power bank on the aircraft, and it is prohibited to activate other functions of the power bank 'food.

Lithium battery equipment and replacement batteries exceeding 100 Wh but not exceeding 160 Wh must be declared to the airline and approved. Only 2 batteriesSpare parts of this specification can be transported.

3. It is prohibited to carry on board electronic equipment with lithium batteries and spare batteries exceeding 160 Wh (with the exception of wheelchairs powered by lithium batteries).

4. Protective measures for carrying replacement lithium batteries

Put the lithium battery separately in its original retail packaging, plastic bag or protective box, or put tape on it on the exposed electrodes to prevent the lithium battery from exploding and spontaneously igniting due to friction, collision and short circuit.

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