The composition of household energy storage batteries varies according to different types of batteries, and the following are two common household energy storage batteries and their advantages and disadvantages and application scenarios:

Lead-acid batteries (common lead-acid batteries, deep cycle lead-acid batteries, etc.) :

Composition: The main components of lead-acid batteries include positive electrode materials (such as lead dioxide), electrolyte (usually sulfuric acid solution), and negative electrode materials (such as lead).

Advantages: Lower cost, better durability, good charge and discharge efficiency, suitable for emergency backup power, low power applications, etc.

Disadvantages: low energy density, short cycle life, large volume and weight, need regular maintenance and charging, suitable for traditional backup system, UPS power supply, etc.
Lithium-ion batteries (common ternary lithium batteries, lithium iron phosphate batteries, etc.) :
Components: The main components of lithium-ion batteries include positive electrode materials (such as lithium nickel cobalt manganese oxide, lithium iron phosphate, etc.), negative electrode materials (usually graphite), separation membranes (usually polymer films) and electrolytes (usually organic salt solutions).

Advantages: long life, high energy density, fast charging and discharging, smaller volume and lighter weight, better safety performance. Suitable for home energy storage system, solar energy storage system, etc.

Disadvantages: relatively high cost, high temperature and environmental requirements, in extreme cases may appear overheating, smoke, fire and other safety issues.

Different types of household energy storage batteries will vary in application scenarios, but several common application scenarios include:

1. Emergency backup power supply: Provide power supply in case of power failure or emergency.

2. Energy storage system: home solar cell storage system, smart microgrid, etc.

3. Energy peaking storage: Balance the power grid load through energy storage batteries to improve energy utilization efficiency.

According to the specific needs and budget considerations, it is very important to choose the appropriate type of household energy storage battery and application scenarios. It is worth noting that with the progress and development of technology, new energy storage battery technology is also emerging, and more options will be provided in the future.