Why choose 3.2V lithium iron phosphate as the battery for LED street lights?
With the wide application of new energy street lamps, more and more LED street lamp manufacturers have appeared. LED street lamp manufacturer is a solid-state cold light source, which has the characteristics of environmental protection, no pollution, low power consumption, high light efficiency, and long life. Therefore, LED street lamps will become the best choice for energy-saving road lighting. LED street light is a high-efficiency solid-state light source formed based on a semiconductor PN junction that can emit light with weak electric energy. Under a certain forward bias voltage and injection current, the holes injected into the P area and the electrons injected into the N area are in After being diffused to the active area, photons are emitted through radiation recombination, which directly converts electrical energy into light energy. Many manufacturers just pure production, and do not have too many technical patent reserves. LED street light is a high-efficiency solid-state light source formed based on a semiconductor PN junction that can emit light with weak electric energy. Under a certain forward bias voltage and injection current, the holes injected into the P area and the electrons injected into the N area are in After being diffused to the active area, photons are emitted through radiation recombination, which directly converts electrical energy into light energy. According to past experience, 12V colloidal lead-acid batteries are used. Or 12V ternary lithium battery, the clever battery is very heavy, the service life is not as good as the lithium battery, and has been slowly eliminated by the market. The ternary lithium battery has high energy density and long service life, but the safety is not reliable, so we now use 3.2. V lithium iron phosphate battery is used as the battery of led street lamp. Because under the current market technology conditions, we believe that 3.2V lithium iron phosphate battery is the most cost-effective lithium battery, not only safe, but also the service life and price can reach our expected results. The following are some of the reasons why 3.2V lithium iron phosphate batteries are used as LED street lamp batteries. 1. The battery has no balance problem and can be used for more than 15 years. Because lithium iron phosphate batteries are all manufacturers of electric vehicles, they are almost all listed companies on the main board. According to the design of 'MiaohongGoing to the street light, the charging intensity is only 0.1-0.3c. The car has no problem towing the street light for 10 years in 5 years. 2. The controller and the lamp bead are directly connected together, which greatly improves the reliability. The installer only needs to insert the DC plug. 3. Low-light power generation is much better. Photovoltaic street lights can do well in sunny days. The key is to generate power in low-light rainy days. the reason is simple. Photovoltaic effect uses light intensity, 12V battery and 3.2V battery panel to generate electromotive force (voltage). I believe you should know which kind of power generation is greater on rainy days. 4. From the perspective of the composition and structure of lithium batteries, iron-lithium batteries have no heavy metals and are scarce in resources. They will definitely become cheap and clean energy batteries. Cobalt in ternary lithium polymers is scarce, and cobalt salts have tripled in the past year alone. In the end, many people will ask that everything has two sides. Let me also mention a few shortcomings of 3.2v lithium iron phosphate batteries. The wiring is really bold, the plugs, and we even have to use military classes. 2 The requirements for supply chain management and production equipment are very high. For example, iron-lithium producers are generally listed on the motherboard of the motherboard, and have thresholds for capital and quantity. For example, full parallel connection requires high LED suppliers, we only use the world's number one. One of the Nichia Chemicals has a batch tolerance of less than one part per million. (3) Subversive damage to lead-acid manufacturers, controller manufacturers and ternary lithium manufacturers, and traditional government bidding documents are usually prepared by them. 4 4 The above points can be summed up in one sentence, calling for low failure rate, long life, and high cost performance. These are the real pain points of the photovoltaic street lamp industry for many years, while the two harmful rights are relatively minor. We spent ten years practicing tens of millions of light bulbs. Prove and believe that choosing 3.2v lithium iron phosphate battery is the future. At present, more and more street lamps have chosen the technical path of 3.2v lithium iron phosphate battery.