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led solar street light

Lithium ion battery for solar street light

Li-ion battery for solar street light Wiring method

solar street light li ion battery

1. Wiring method of lithium ion battery pack and solar LED light, load output: positive and negative (red wire represents positive electrode, black wire represents negative electrode); the positive electrode is connected to the positive electrode of the LED light, and the negative electrode is connected to the negative electrode of the LED light.

2. Wiring method of lithium ion battery pack and solar panel, solar input: positive and negative (red wire represents positive electrode, black wire represents negative electrode); the positive electrode is connected to the positive electrode of the solar panel, and the negative electrode is connected to the negative electrode of the solar panel.

Li-ion battery for solar street light installation steps

battery of solar street light

1. Connect all connecting wires and check whether the charging indicator (green light G) is on normally.

2. If it is on normally, unplug the solar input after 10 seconds, the load output LED light is on normally.

3. Reconnect the solar input and the load output LED will go out after 10 seconds.

4. After all the above steps are over, the solar street light can be used normally

all in one solar street light

Do solar street lights need to replace the battery?

The life of other accessories of solar street lights can last over 10 years, but solar street light battery usually needs to be replaced after 3-5 years, so the key is the battery life and quality that influenced the solar street lights life.

All in one solar street light is an independent power generation lighting system, it is composed of battery, solar street light pole, LED lights, battery, solar street light controller and other components.

No need to connect to the mains, the solar panel converts light energy into electrical energy during the day and stores it in the solar battery, at night the battery supplies power to the LED light source to make it shine.

solar street lights battery

 

1、Solar led lights panels

We all know the solar panel, it is the whole system of power generation equipment, it is composed of silicon wafers, the service life is very long, can reach about 20 years of life.

2、Solar led LED light source

LED light source is composed of at least a few dozen light beads containing LED chips, theoretical life of 50,000 hours, normal is by can reach about 10 years.

3、Solar led Street light pole

Solar Street light pole is made of Q235 steel rolled pole, the whole hot dip galvanized treatment, hot galvanized anti-rust and anti-corrosion ability is strong, so at least to ensure 15 life.

4、Solar led street light Controller

General controller waterproof sealing grade is high, the normal use of a 10-15 years is no problem.

5、Solar led street light Battery

Solar street lights are currently mainly used in the battery is a gel maintenance-free battery and lithium batteries. Gel battery life normal 2 to 3 years, lithium battery life normal in 5 to 8 years. In normal use, 3 to 5 years is the time to replace the battery, because by 3 years or 5 years, the actual capacity of the battery is much lower than the initial capacity, affecting the lighting effect.

In general, the key to the service life of solar street lights is the battery, when buying solar street lights, it is recommended that the battery should be configured to be larger, to develop the life of the battery is his cyclic discharge life, complete discharge is about 500 to 800 times.

If the capacity of the battery is only enough to discharge every day, then the battery is easily damaged, but the capacity of the battery is several times the daily discharge, that means a few days to have a cycle, which greatly increases the life of the battery, and the capacity of the battery is several times the daily discharge, is to ensure that the number of consecutive rainy days is longer.

The service life of solar street lights also lies in the usual necessary maintenance, in the early stages of installation, to strictly follow the construction standards to do, in the configuration is also as reasonable as possible with, increase the capacity of the battery, so as to extend the life of solar street lights.

all in one solar led street light

The current 8 year non-replacement battery has in fact been such a product, the battery used in our solar street lights is designed not to be replaced for 8 years. Let’s put it this way, there is a lithium iron battery with a cycle count of 2,000 cycles, which means no replacement within 5 years,

Our new German designed solar street light has been on the market since 2008, according to all the statistics conducted worldwide the proportion of bad batteries after use is less than 0.5% (no need to replace)

 

The fact that the batteries in our products are not replaced within 5 years is very normal and a fact, plus our new invention of a battery technology patent (a technology to extend the life of the battery) in 2012 on the basis of which the life of the design is 8 years without replacement.

 

 

solar street light battery

Solar led street light battery capacity

With the continued development of solar led street lights, solar street light battery type changed from lead-acid batteries to lithium batteries. So how to calculate the battery capacity of solar led street light?

Many manufacturers use 20AH lithium batteries with a false mark capacity to impersonate 80AH to customers, access to large profits, 2014 to 2016, many manufacturers earn a lot of profit by lithium batteries these years.

solar led street light battery

12V 60Ah lithium battery, for example: the normal use of 3.7V 2Ah cells, 60Ah ÷ 2Ah × 3 = 90 section. When you learn that a 90-section cell has a 12V 60AH capacity, cutting corners requires another upgrade.

Yes, the battery cells give you 90 knot cells, but quietly give you 3.7V 1AH instead. At this point the capacity is only 30AH, all of a sudden a lot of cost reduction, for dishonest businesses, this could be profit, or a nuclear weapon to seize the market.

So it is very important to know how to calculate the solar street light battery capacity, sometimes you can avoid being cheated.

How do you calculate the configuration of lithium-ion battery solar street lights?

Let’s take 40W LED light source as an example: the customer requires 8 hours of lighting per day, and 3 days for rainy days.

Let’s take the 18650 lithium ternary battery as an example.

Known conditions: the nominal voltage of a lithium-ion secondary battery is 3.7V; the system voltage of a 40W LED light source is 12V; the platform voltage of three lithium-ion batteries combined in series is 11.1V, and the standard charging voltage of the battery plate is 17.5V.

Let’s popularize the conversion of Ah (amp-hours) to Wh (watt-hours) units.

Wh (watt-hours) and Ah (amp-hours) are both ways to measure battery capacityAH is a measure of the capacity of an electrical storage device, meaning that the product of current (amperes) and discharge time (hours) in units of capacity [AH] can be satisfied by conforming to the discharge curve (a similar inverse proportional curve).
We often see a number in Wh next to the mAh.
The work done by the battery W = UIt = voltage (V) * current (A) * time (h).
Voltage U*Current I=Power P (Watt, letter “W”)
Therefore, the work done by the battery W=P*t, the unit is Wh.
Ah = Work (W)/Voltage (U)

Daily power required by 40W LED light source = 40W*8H=320Wh
Solar street light design needs to take into account the day’s rainy weather conditions, for example, 3 days in Nanjing design.

Then 3 days 40W LED light source needs total power = 320Wh * (3 + 1) days = 1280Wh
Then lithium battery capacity = work (W) / voltage (U) = 1280Wh/11.1V = 115AH

Through the calculation of solar street light battery capacity, the next time we buy solar street lights, we can better identify whether the manufacturers deceive us, so as to buy a good price, more suitable for our products.

 

solar street light battery price

4 types of solar street light battery

There are 4 types of solar street light batteries: lead-acid batteries, colloidal batteries, ternary lithium-ion batteries and lithium iron phosphate batteries.

With the increasing maturity of new energy technologies, the country vigorously pursues energy conservation and emission reduction, the application of solar street light system is becoming more and more widespread, then as the core of its system of an accessory,  following we will analysis these 4 types of solar street light batteries.

1. Solar street light lead-acid battery

Lead-acid batteries are composed of lead and lead oxide, and the electrolyte is an aqueous solution of sulfuric acid. The important advantages of lead-acid batteries are relatively stable voltage, cheaper price and high security;

the disadvantage is that the service life of lead-acid batteries is relatively short, the volume is much larger than ordinary batteries, but because of its price advantage, it is still dominant in the use of solar street lamp industry.

2. solar street light colloidal battery

It is equivalent to an upgraded version of lead-acid batteries, maintenance-free and less maintenance, and importantly, it replaces the sulfuric acid electrolyte with a colloidal electrolyte internally, which improves the storage capacity, discharge capacity, safety performance and life expectancy.

Gel batteries can be used within the temperature range of -40℃~60℃, with better low temperature performance, and are the best choice in the northern alpine region or tropical areas where the temperature is higher; their anti-vibration performance is also very good, and can be used safely under a variety of harsh conditions, and their service life is double or even more than that of ordinary lead-acid batteries.

3. Solar street light ternary lithium ion battery

High specific energy, small size, fast charging, high price, its deep cycle times of 500 to 800 times, life and gel batteries are almost the same, the temperature range of use is -15 ℃ ~ 45 ℃.

But ternary lithium-ion batteries also have disadvantages, poor safety, if the battery is not very stable inside, or unqualified manufacturers of ternary lithium, it is very likely to explode in the process of overcharging or higher temperatures.

4. solar street light lithium iron phosphate ion battery

battery of solar street light

High specific energy, small size, fast charging, good stability, temperature range is also wide, but the price is the highest of all the batteries, due to cost issues have not been large-scale implementation of the use.

Most solar street light systems currently use lead-acid batteries and colloidal batteries, some use lithium batteries, then how to maintain it in the course of use?

①Prevention of overfilling

Solar street lamp battery life depends on external maintenance, but also with the internal heat accumulation is closely related to the solar battery if overcharged, it will make the battery internal temperature rise step by step, the phenomenon of thermal runaway.

(2) Prevention of insufficient voltage

In addition to preventing over-charging, solar cells should also prevent under-charging, always under-charging then may also be a problem with the racking system, or the voltage is too low to cause, often under-charging will lead to a reduction in the number of cycles, which will also shorten the life of the battery.

(3) Prevent over discharge

The discharge depth of the battery is closely related to the designed charge/discharge cycles (service life) of the battery.

④ Control the ambient temperature

Especially high temperature environment will shorten the life of solar battery by half, the life of the battery is longer in normal weather, but in high temperature, the battery will suffer; if it is used in extreme low temperature or high temperature environment, it is recommended to use the gel battery with a wide range of temperature application.

The lithium solar street light battery includes lithium solar battery cells, battery special material, the ease of design, time consuming costs, assembly costs, solar street lamp battery pack transportation costs for the overall tax quotes, with special requirements of the lithium solar street light prices are higher.

battery of solar street light

Four kinds of solar street lights batteries?

Solar batteries are the main accessories in solar street lights. Currently, there are four types of batteries: lead-acid batteries, gel batteries, Li ion lithium batteries, and LiFeP04 lithium batteries. The four types of batteries commonly used in solar street lights. Which battery is the best? Let’s take a look at the characteristics of these four batteries:


1. Lead-acid battery

Lead acid battery


The plates of lead-acid batteries are composed of lead and lead oxides, and the electrolyte is an aqueous solution of sulfuric acid. The main advantage of lead-acid batteries is that the voltage is relatively stable and the price is relatively cheap; the disadvantage is that the specific energy is relatively low, so the volume is much larger than ordinary batteries. The service life of lead-acid batteries is relatively short, generally 300-500 deep cycles. Maintenance is relatively frequent, but because of the price advantage, it is still widely used in the solar street lamp industry.



2. Gel battery

Gel battery


It is equivalent to an upgraded version of lead-acid battery. It is maintenance-free and solves the frequent criticism of lead-acid battery maintenance. Internally, colloidal electrolyte is used instead of sulfuric acid electrolyte, and the storage capacity, discharge capacity, safety performance and life are improved. , But sometimes even surpass the ternary lithium battery in terms of price. The gel battery can be used in the temperature range of -40 ℃-65 ℃, the low temperature performance is better, and it can be used in the northern cold regions. It has good seismic performance and can be used safely under various harsh conditions. The service life is double or even more than ordinary lead-acid batteries.



3.   Li-ion lithium battery

Li Ion battery
The advantages of  Li-ion lithium batteries are many. It has high specific energy, small size, fast charging and high price. The number of deep cycles is about 500-800 times, the life is similar to that of gel batteries, and the temperature range used is -15℃-45℃. However, the ternary lithium battery also has disadvantages, and its battery is not stable inside. If it is a  Li-ion lithium battery produced by an unqualified manufacturer, it may happen that it may explode during the overcharge process or in a high temperature environment. 




4. LiFeP04 Lithium  battery

solar street light battery price

LiFeP04 Lithium  battery is a battery that integrates many advantages. It has higher specific energy, small size, fast charging, long service life and good stability, but the price is the highest of all batteries. The number of deep cycle charging is generally 1500-2000 times, a group of lithium iron phosphate batteries under normal use, can generally be used for 8-10 years, can be used in an environment of -40 ℃ -70 ℃, the use of temperature The scope is relatively wide.

1.The charge and discharge times of LiFePO4 Lithium battery is 2000 times, but Li-ion Lithium battery is only 800 times. Lifespan of LiFePO4 is 2.5 times than Li-ion.

2.In hot summer LiFeP04 Lithium battery is stable, but Li-ion Lithium battery is easy on fire.

3. LiFePO4 battery is twice expensive than Li-on lithium battery, and more stable. Lifespan of LiFePO4 10 years, Li-ion battery only 4 years.

It can be concluded from this that the use of  LiFeP04 Lithium  battery in solar street lights is of course the best, but the price is relatively high. LiFeP04 Lithium  battery is a domestically developed energy storage battery with mature and independent independent property rights.

There are many manufacturers, and the use conditions and safety protection are also very well done, so the use of lithium iron phosphate battery is the best choice. Questions about solar street lights and solar batteries are welcome to interact with Belinda or Clodesun.com.