What type of batteries for solar garden lights?

What type of batteries for solar garden lights?

Lithium battery: It is a type of battery for solar garden lights that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. It mainly relies on lithium ions to move between the positive and negative electrodes to work. During charging and discharging, Li+ Embedding and de-embedding and forth between the two electrodes. During charging, Li+ is deintercalated from the positive electrode, intercalated into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state. During discharge, the situation is reversed. Due to the very active chemistry of lithium batteries, the processing, storage and use of lithium metal are very demanding on the environment.

Storage battery: A storage battery is also called a secondary battery. It is a device that directly converts chemical energy into electrical energy. It is a rechargeable battery designed to be recharged through a reversible chemical reaction, usually a lead-acid battery. After discharge, the internal active material can be regenerated by charging – storing electrical energy as chemical energy. And converting chemical energy into electrical energy again when it needs to be discharged. A battery is an electrochemical device that stores chemical energy and releases electrical energy when necessary.

What’s the difference with other batteries?

The safety performance is different

Lithium battery: The lithium battery comes from the stability and reliable safety design of the positive electrode material. The lithium iron phosphate battery has undergone strict safety tests and will not explode even in severe collisions. Lithium iron phosphate has high thermal stability and is electrolytic. The liquid oxidizing ability is low, so the safety is high.

Other Batteries: Lead-acid batteries will explode under strong collisions, posing a threat to consumers’ lives.

The price is different

Lithium batteries: Lithium batteries for solar garden lights are expensive, and lithium batteries are about three times more expensive than lead-acid batteries. Combined with the service life analysis, the same cost is invested, and the service life of lithium batteries is still longer.

Different green environmental protection

The lithium battery material does not contain any toxic and harmful substances and is regarded as a green battery by the world. The battery is pollution-free in both production and use, and conforms to the European RoHS regulations. It is a green battery.

There is a large amount of lead in lead-acid batteries. If they are disposed of improperly, they will pollute the environment.

In terms of cycle life

Lithium batteries for solar garden lights have a longer service life and batteries have a relatively short service life. The number of cycles of lithium batteries is generally about 2000-3000 times.

The number of cycles of the battery is about 300-500 times.

batteries for solar garden lights

Gravity energy density

The energy density of lithium batteries is generally 200~260wh/g, which is 3~5 times that of lead-acid batteries. This means that under the same capacity, lead-acid batteries are 3~5 times that of lithium batteries. So in energy storage devices In terms of lightweight, lithium batteries have an absolute advantage.

Lead-acid batteries are generally 50~70wh/g, with low energy density and are too bulky.

Volume energy

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

Different temperature ranges

The working temperature of the lithium battery is -20-60 degrees Celsius, and the thermal peak of the lithium iron phosphate battery can reach 350~500 degrees Celsius. And 100% of the capacity can still be released under high-temperature conditions.

The normal working temperature of the battery is -5-45 degrees. When the temperature drops by 1 degree, the relative battery capacity will decrease by about 0.8%.

Different charging and discharging

The lithium battery for solar garden lights has no memory effect, the battery can be charged and discharged at any time. The self-discharge of the battery is low, and the battery can be stored for a long time. The power is strong, and it can be charged and discharged quickly.

The battery has a memory effect and cannot be charged and discharged at any time. There is a serious self-discharge phenomenon, and the battery is easy to be scrapped if it is left for a period of time. The discharge rate is small, and it cannot be discharged with a large current for a long time.

Different internal materials

The positive and negative electrodes of the lithium battery for solar garden lights are lithium cobalt oxide, lithium iron phosphate, and lithium manganate.

The positive and negative electrodes of lead-acid batteries are lead oxide, and metal lead, and the electrolyte is concentrated sulfuric acid.

 

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