In the evening of December 14, six new energy reserve solar street lamps developed by researcher Li Hongbin and his team lighted up the roads at night in the park.
New energy reserve solar street lamp system developed by New Energy Center is composed of solar photovoltaic cell module, LED Lamps, storage cell, control system and lamp-post. Solar control system integrated solar controller and cell protection board, and real time monitor, protect, and control all kinds of working conditions of solar street lamp system; energy storage battery use center self-research and develop the magnesium base battery cell and magnesium-lead storage battery with independent intellectual property, the two kinds of batteries have different characteristics, and comparing to tradition lead-acid battery and common secondary battery, they have characteristics of small volume, light weight, large power, high cycle life, wide range of working temperature, large Monomer nominal capacity, and good environmental performance, and after stored enough energy, it can guarantee lighting of 15 to 20 days without sunshine. Six street lamps contributed by the center respectively adopt new magnesium-lead storage battery set and 18650 magnesium base battery set, they are lighted automatically at night, and lighting with full power in the first half of night, and work with nominal power after midnight.
Comparison of magnesium-lead storage battery and traditional lead-acid storage battery with the same specification, and their characteristics are as follows:
|
Technical Parameter |
Chilwee Battery |
Tianneng Battery |
Modified Storage Battery |
|
Nominal Voltage(V) |
12 |
12 |
12 |
|
Gravimetric Specific Energy (wh/kg) |
30-35 |
30-35 |
35-45 |
|
Volumetric Specific Energy (wh/L) |
130 |
130 |
145-160 |
|
Cycle Life (Time) |
~400 |
~400 |
≧700 |
|
Operation Temperature (℃) |
-10~50 |
-10~50 |
-25~50 |
|
Self Discharge Rate (%/month，25 ℃) |
20-40 |
20-40 |
Lower than 10% |
|
Monomer nominal capacity （Ah） |
12 |
12 |
14 |
|
Remarks |
Chilwee Power Co., Ltd. and Tianneng Group are top enterprises of lead-acid storage battery industry. | ||
Performance comparison of magnesium base battery and other common secondary battery:
|
Technical Parameter |
Lead-acid Battery |
Nickel-cadmium battery |
NI-MH Battery |
Lithium ion battery |
Magnesium base battery |
|
Operating voltage （V） |
2.0 |
1.2 |
1.2 |
3.6 |
3.6 |
|
Gravimetric Specific Energy （Wh/Kg） |
30-35 |
30~50 |
35~65 |
110~180 |
180-250 |
|
Volumetric Specific Energy （Wh/L） |
130 |
150 |
200 |
270~560 |
550-650 |
|
Cycle Life (Time) |
～200 |
～150 |
50～1000 |
500～1000 |
500～2000 |
|
Operation Temperature (℃) |
-10～50 |
-10～50 |
-10～60 |
-20～70 |
-50～70 |
|
Self Discharge Rate (%/month） |
20～40 |
25～30 |
30～80 |
6～10 |
Under 5% |
|
Memory Effect |
None |
Strong |
Weak |
None |
None |
|
Green |
Poor |
Poor |
Medium |
Good |
Good |
