We know that the general comparison of energy storage products should be carried out from the perspectives of weight energy density, volume energy density, service life, price, applicability, national policies, etc.:

Gravimetric energy density

The current energy density of lithium batteries is generally 200~260wh/g, and lead-acid is generally 50~70wh/g, so the weight energy density of lithium batteries is 3~5 times that of lead-acid, which means that under the same capacity, lead Acid batteries are 3 to 5 times that of lithium batteries, so lithium batteries have an absolute advantage in the lightweight of energy storage devices.

Volume energy density

The volume capacity density of lithium batteries is usually about 1.5 times that of lead-acid batteries, so under the same capacity, lithium batteries are about 30% smaller than lead-acid batteries.

Life cycle

At present, the more popular material systems are ternary and lithium iron. The cycle times of ternary power lithium batteries are usually more than 1000 times, the cycle times of lithium iron phosphate batteries are more than 2000 times, and the cycle times of lead-acid batteries are usually only 300~350 times. times, so the service life of lithium batteries is about 3-6 times that of lead-acid batteries.

Price

At present, the price of lithium batteries is about three times more expensive than that of lead-acid batteries. However, combined with the analysis of service life, the service life of lithium batteries is still longer for the same cost.

Applicability

Because the safety of lithium batteries is slightly worse than that of lead-acid batteries, various safety precautions need to be taken in use, such as preventing damage to lithium batteries caused by external forces or accidents, because this may cause fire or explosion; Temperature suitability is also very good, so in other suitability, lithium batteries are not inferior to lead-acid batteries.

Use occasions

Lead-acid batteries: car starting, electric vehicle batteries,

Lithium batteries: cell phones, computers, power tools, and now also used in electric vehicle batteries.

Internal material

The positive and negative electrodes of lead-acid batteries are lead oxide, metal lead, and the electrolyte is concentrated sulfuric acid.The positive and negative electrodes of the lithium battery are lithium cobalt oxide/lithium iron phosphate/lithium manganate, graphite, and organic electrolyte.

Shenzhen Topband Battery Co., Ltd.，established in 2006, is a wholly-owned subsidiary of Shenzhen Topband Co., Ltd. (002139.SZ). We focus on lithium iron phosphate batteries,with independent research and development in cells and BMS. With the ability to integrate the entire industry chain, we are committed to providing customers with one-stop lithium battery solutions and services. Our quality products are widely used in energy storage and light power.