a school bag that can be folded and can generate electricity

Everyone’s impression of a backpack can still be a huge and cumbersome impression. If you put more things on your back, it will be heavy, it will only store things, and there are no other extra features. If the fabric is not good, if it is good, it will get wet on rainy days. It will be very troublesome to use after a few days of drying. With the advent of sungzu solar folding, these problems will be solved.


First of all, it has black and camouflage two-color options, stylish personality, looks simple and generous. The unique folding design is light and portable, with no heavy load on the back. Made of polyester 600D material, waterproof performance is better. It is equipped with a voltage-proof protective wire box to stabilize the voltage and safe output, so that you can charge it with confidence. Applicable to mobile phones, tablets, mobile power, cameras, psp and other products, put on charge.

The future will be a technology-led world that will enter our lives and benefit humanity. The combination of solar folding backpacks will be a small helper to help us summarize everything. Technology that will become a family member. Effectively and intelligently summarizing everything we use in the future, we can help us stay outdoors and let us calmly face extreme environments.

How to improve the reliability of UPS power supply

1. Add parallel battery pack

The use of a single battery portable solar generator can greatly increase the risk of normal power load. If the series battery fails, it will affect the discharge of the entire battery pack, resulting in the UPS being unable to supply power. If a series of battery packs are connected in parallel on the UPS, assuming that one of the battery packs fails, the UPS can still be powered by another normal battery pack for a period of time so that there is time to connect the standby generator to supply power normally or to shut down the load device.

2.the installation of diesel generator

Battery power can only solve the urgent need for a moment. In the face of prolonged power outages, even the most durable battery packs can be “ruthless”. Therefore, in the case of a long power outage, it is more desirable to use a diesel generator as a backup power source.

3. Improve availability by installing UPS in parallel

Redundant design logic is not only suitable for power protection solutions, but also for UPS designs. In power supply design, the construction of multiple power paths can fundamentally improve the reliability of the system. The ultimate performance of the power supply chain is limited by the weakest link, and adding multiple redundancy at each point in the supply chain improves overall reliability.

Therefore, the most reliable power transmission system typically includes multiple independent power paths from the main power source to the electrical load, avoiding overlap as much as possible. With redundantly configured power systems, IT components are not shut down when components fail or perform routine maintenance.

Power certification logo explanation

Sungzu Xiaobian does not know whether the netizens have carefully observed their own power nameplate. After we get the power supply, we will see if there is any relevant certification. Each power supply has a lot of certified LOGO logos. How many netizens can know which certifications their power supplies have passed? What is the significance of these certifications? Next, Xiaobian will explain the meaning of these certification marks.

Power rating plate certification mark

First: CE certification mark

In the EU market, the “CE” mark is a compulsory certification mark. Whether it is a product produced by an enterprise within the EU or a product produced by another country, in order to freely circulate in the EU market, the “CE” mark must be affixed to indicate the product. It meets the basic requirements of the EU Directive on Technology Coordination and Standardization. This is a mandatory requirement for products in EU law.

CE certification, that is, only the product does not endanger the basic safety requirements of human, animal and goods safety, rather than the general quality requirements, the coordination directive only specifies the main requirements, the general directive requirements are standard tasks. Therefore, the exact meaning is that the CE mark is a safety pass mark and not a quality pass mark. It is the “main requirement” that constitutes the core of the European Directive.

Second: FCC certification mark

The FCC certification is easy to understand and is a compulsory certification in the United States. Electronic and electrical products exported to the United States must pass the FCC certification before they can be sold through the US Customs and in the United States!

FCC certification is divided into three categories according to various products.

1. FCC ID certification

Specifically for wireless products, the certificate is issued by the US TCB agency. When applying for certification, the enterprise first needs to apply for the Code code. The certification company issues a test report for the product inspection, and the TCB agency audits the certificate. This cycle is relatively long, about 4 weeks. about

2. FCC VOC certification

These products are specially certified for ordinary electronic and electrical products. The main test is radiation. After passing the test, the third-party testing agency will issue reports and certificates. The cycle is relatively fast, about 1 week.

3. FCC DOC certification

Mainly for IT products, computers and computer peripheral products. This kind of test project is more complicated, the certification period is moderate, about 1-2 weeks

Third: ROHS certification mark

RoHS is a mandatory standard enacted by EU legislation, and its full name is the Restriction of Hazardous Substances (Restriction of Hazardous Substances). The standard was officially implemented on July 1, 2006. It is mainly used to standardize materials and process standards for electrical and electronic products, making it more conducive to human health and environmental protection. The purpose of this standard is to eliminate lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers in electrical and electronic products (Note: the correct Chinese name for PBDE refers to polybrominated diphenyl ethers, and polybrominated diphenyl ethers are wrong. A total of 6 substances, with a focus on the lead content of not more than 0.1%.

Fourth: National 3C certification mark

The 3C certification is called the “Compulsory Product Certification System”. It is a product conformity assessment system implemented by the Chinese government to protect consumers’ personal safety and national security, strengthen product quality management, and implement laws and regulations. The so-called 3C certification is China’s compulsory product certification system.

3C certification is divided into four categories according to different products:

The first is the security certification identifier suffix identifier is “S”

The second type is the EMC mark with the suffix labeled “EMC”

The third type is the fire certification mark, and the suffix mark is “F”.

The fourth is the safety and electromagnetic compatibility mark, and the suffix mark is “S&E”.

These four 3C certification marks have five different sizes of specifications. What we see on the power supply is the “Safety and Electromagnetic Compatibility Certification Mark”.

The above three types of power certification, 3C certification is a national mandatory standard, refers to the standards that must be passed for power products produced in China, and other international non-mandatory standards, so it is recommended that you purchase more comprehensive certification of power products.

How to maintain the protable solar generator battery

The battery is a key component of the portable solar generator. In large and medium-sized UPS equipment, the price of UPS battery is much larger than that of UPS. It can be said that battery maintenance is the biggest guarantee for UPS. Battery maintenance can be divided into two parts: routine maintenance and special maintenance.

1. Daily maintenance

In areas where the power supply is not frequently cut off, the UPS should be subjected to shallow discharge treatment every month, and moderate discharge treatment should be performed every 3 months, regardless of whether the power supply is cut off or not every 9 months. Deep discharge. The discharge of the battery is to manually disconnect the AC power and use the U P S inverter to power the load. The normal discharge capacity of shallow discharge is 1/5 of the total capacity of the battery, medium discharge is 1/3~1/2 of the battery capacity, and deep discharge is 4/5 of the battery capacity. The daily maintenance of the battery is to maintain the activity of the battery, it can effectively avoid acidification of the panel, so that the panel is always in good working condition. It should be noted that after the UPS has been operating effectively for more than two years, the discharge level should be reduced by a certain amount.

2. Special maintenance

The UPS unit will enter the special maintenance phase of the battery after six months of continuous operation. The special maintenance method is to periodically check the battery pack battery capacity difference (4~6 months). The specific method is to separately measure the terminal voltage of each battery in the battery pack. When it is found that the voltage difference between the respective battery terminals is higher than 0.5V, it is necessary to separately charge the battery with the low-end voltage, and pay special attention to the battery in future maintenance. After three or more consecutive times, special maintenance must be performed after the battery voltage is abnormal. Although the design life of commonly used NP series batteries is generally more than 5-8 years, the nominal cycle life of ordinary UPS power supplies is about 3 years. Battery life that lacks scientific and effective maintenance is usually within about 2 years.

Therefore, regular maintenance of the battery pack can extend its service life and ensure the power-off delay capability of the machine.

Wind and solar energy have become the cheapest source of electricity

According to Lazard, the US investment bank, Wind Energy and Solar Energy have become the cheapest sources of electricity, and natural gas power plants are the best choice to support them.


Lazard said in a recent report that the average energy cost of large solar installations fell to $36 per megawatt hour, while wind power costs were as low as $29 per megawatt hour. This is cheaper than the most efficient natural gas plants, coal-fired power plants or nuclear reactors.

According to George Bilicic, head of global power and energy at Lazard, “even if renewable energy becomes cheaper, natural gas plants are still a competitive way to balance the intermittent output of wind and solar energy. On the other hand, the coal and nuclear industries Trying to keep going.”

“We will continue to see this battle going on,” said George Bilicic. “While grid-scale energy storage may one day become an ideal support for wind and solar power plants, the cost of the technology remains high and not practical.”

Small Home Solar Power System

What are the main parameters of the portable solar generator power supply

When it comes to the parameters of the portable solar generator  power supply, it mainly depends on its input characteristics and output characteristics.When it comes to the parameters of the portable ups power supply, it mainly depends on its input characteristics and output characteristics.
Input characteristics:
1. Input voltage range Wide input voltage range reduces battery discharge opportunities and extends battery life.
2. Input power factor If the power factor is low, the input reactive power is large, and the harmonic current will pollute the power grid and affect other equipment.
3. The allowable range of the main power frequency.
4. Input current harmonic components. (PFC, 6/12 pulse rectifier)
Output characteristics:
1. Static stability. The size is 1% for large and 2% for small and medium.
2. Output transient characteristics. 5% larger, 8% smaller.
3. Output overload capability. (Example: overload 120% 4MIN; 130% 10S)
4. Output power factor. (0.6, 0.7, 0.8) 5. Output voltage harmonic distortion. Usually within 3%.

Portable solar generator power structure and working principle

It consists of a set of AC + DC charging + AC and DC inverters. When the utility power is normally supplied, the battery in the portable solar generator is charged. Once the main power supply is interrupted, the battery immediately outputs the stored DC power to the inverter and converts it to AC power to supply the computer equipment, thereby maintaining power continuity to the computer equipment. Under normal circumstances, the small and medium power backup UPS is powered by the battery for about 10 to 30 minutes.It consists of a set of AC + DC charging + AC and DC inverters. When the utility power is normally supplied, the battery in the UPS is charged. Once the main power supply is interrupted, the battery immediately outputs the stored DC power to the inverter and converts it to AC power to supply the computer equipment, thereby maintaining power continuity to the computer equipment. Under normal circumstances, the small and medium power backup UPS is powered by the battery for about 10 to 30 minutes.

1. AC filter voltage regulation loop
The AC filter circuit mainly filters and purifies the input AC power and removes interference components from the power grid. And pressure adjustment within a certain range.

2. Rectifier charging circuit
The rectification charging circuit rectifies the alternating current into direct current, charges the battery through the charging circuit, and supplies the required direct current to the inside.

3. Battery pack circuit
Widely used in small and medium sized UPS is the M-type sealed battery, which is a sealed maintenance-free battery. Typically, each battery is rated for 2V, 4V, 6V or 12V. They are connected in series and in parallel to form a battery pack for the UPS. The specification capacity of the battery is expressed in ampere-hours (Ah), such as 12V, 6Ah / 20hR. It shows that the battery’s output voltage is 12V and the rated capacity is 6Ah. The index refers to the total ampere-hours measured when the battery is discharged at a rate of 20 hours (discharge current is 6/20 = 0.3 A), and is discharged until the final voltage of the battery output is 10.5 V. The battery is an important part of the UPS. The performance and quality of the battery directly affects the quality of the UPS power supply. Its cost accounts for more than 1/3 of the total machine cost.

4. Pulse width modulation type (PWM) inverter and control circuit
In UPS, Pulse Width Modulation (PWM) is commonly used to convert DC to AC, and a circuit that converts DC to AC is called an inverter. The inverter and its control circuit are the core circuits of the UPS. For the standby UPS, when the power supply voltage is lower than 170V, the internal AC voltage regulator circuit cannot maintain the normal 220V output, the inverter starts to work, and the DC power stored in the battery is converted into AC power. The output waveform is usually a square wave, and some UPS output waveforms are sine waves. When the mains supply rises above 180V, the inverter stops working and returns to the main power state (regulated output is 220V).For online UPS, the inverter is always in the inverter operating state. When commercial power is supplied, the alternating current is continuously rectified to direct current and then inverted to an alternating current output (the output waveform is a sine wave). When the mains voltage drops below 170V, the inverter converts the DC power stored in the battery to an AC output. When the utility power rises to 180V, it returns to the main power state.

5. Detection alarm protection circuit
In order to ensure safe and reliable operation of the UPS, the UPS must have complete detection and protection circuitry. General UPS is equipped with overcurrent, overvoltage, no-load protection, battery voltage is too low, battery polarity and AC polarity detection circuit, indicator light and horn alarm circuit.

6. Intelligent monitoring and communication circuit
The new intelligent UPS has the function of communicating with the computer and automatically monitoring. The UPS monitoring software can monitor the operation of the UPS and the power line at any time through the interface communication line, record and prompt the power failure situation, and automatically handle data storage and system protection during power failure.

Portable ups power supply and maintenance considerations

Portable solar generator is a safe, portable, efficient and environmentally friendly small energy storage system that provides you with a portable and sustainable green energy solution. Pay attention to the following aspects when using and maintaining:Portable UPS is a safe, portable, efficient and environmentally friendly small energy storage system that provides you with a portable and sustainable green energy solution. Pay attention to the following aspects when using and maintaining:

1, the first charge must have skills
After purchasing a new portable UPS, the UPS should be plugged into a 220V power supply and charged for at least 12 hours to ensure that the battery is fully charged. If the UPS is not used for a long time. It should be turned on for 24 hours every 2 to 3 months to fully charge it, and let the UPS power supply be in the inverter for 2 to 3 minutes to ensure the normal life of the battery. When the UPS is turned on, the battery pack will be charged. Press and hold the power button for more than 1 second to turn on the inverter.

2, reasonable choice of installation location
A good installation location is very important. The place where the portable UPS is placed must be well ventilated. Keep away from water, flammable gases and corrosive substances. The ambient temperature should be between 0 and 40 °C. Keep the air inlet and air outlet open.

3. Install a portable solar generator
Pay special attention to the order of the zero line (N), the fire line (L) and the ground line (G), pay special attention to the ground line. When the system ground fault occurs, do not connect the ground wire to the portable UPS.

4, pay attention to the safe operation of the operator
Safety measures should also be taken when connecting the output power to a portable UPS. Since the output voltage and current of the portable UPS are relatively large, it is necessary to pay attention to safety when connecting the output power to prevent electric shock.

5. Power-on and power-off sequence when using a portable solar generator
The correct power-on shutdown sequence should be to first turn on the UPS to power it, then turn on various loads to avoid damage from transient current surges during startup to the portable UPS. In the order of shutdown, the load should be turned off before the UPS is turned off.

6, avoid using portable solar generator overload
When using a portable UPS, calculate the load size. In order to avoid overload or underload, overload will cause the UPS to be overloaded for a long time, shortening the service life of the portable UPS. If the load is too small, the portable solar generator operating circuit is in an abnormal state for a long time, which is also harmful to the UPS. A reasonable load should be controlled between 50% and 80%.

7, portable UPS can not be idle for a long time
For portable UPS power supplies that have not been used for a long time, charge the UPS power supply to the charging circuit in the machine for 12 hours before restarting the power supply. For standby portable solar generator , it is best to run the portable UPS in reverse every other month. The transformer is operated for 2 to 3 minutes to activate the battery.

8, operation and maintenance
Strictly follow the corresponding power operating procedures during operation. In daily use, all power outlets on the UPS load side should be strictly managed; it is best to distinguish them from the power outlets by color or other effective methods. Unused UPS outlets should be turned off or off. It is strictly forbidden to connect electrical equipment that is not related to the computer on the UPS socket, especially high-power tools.

The difference between lithium-ion battery and lithium battery

Some people who don’t understand the battery will mistakenly think that the lithium-ion battery is a lithium battery. In fact, the lithium battery is a disposable battery, and the lithium ion battery is a rechargeable battery!Some people who don’t understand the battery will mistakenly think that the lithium-ion battery is a lithium battery. In fact, the lithium battery is a disposable battery, and the lithium ion battery is a rechargeable battery!

Lithium-ion battery and lithium battery difference:
1. Lithium primary battery is also called lithium battery. It is made of metallic lithium as an electrode, which generates current by electron transfer and can be discharged continuously or intermittently. Once the power is exhausted, it can no longer be used because it can easily cause dendrite explosion. Widely used in electronic products, such as cameras with low power consumption. The lithium primary battery has a very low self-discharge rate and can be stored for 3 years. It can be stored under refrigerated conditions and will work better. It is a good idea to store the lithium primary battery in a low temperature environment.
2. Lithium-ion battery is also called secondary lithium battery. Charge and discharge are performed by transfer of lithium ions, and an oxide of a lithium-doped metal is mainly used as an electrode. The battery is characterized by high power discharge and long battery cycle life. Due to its low self-discharge rate, it can be stored at 20 ° C for more than half a year, and most of the capacity can be recovered.
Note: Lithium primary batteries are different from lithium ion batteries. Lithium battery can not be charged, charging is very dangerous!
Master more information, all in Sungzu Jingrui Technology Co., Ltd!

The difference between lithium ion battery and lithium polymer battery

Lithium-ion battery, commonly known as “lithium battery”, is a kind of battery that uses lithium metal or lithium alloy as negative electrode material and uses non-aqueous electrolyte solution. It is the best integrated battery system at present. The negative electrode of the lithium ion battery is a carbon material. For example, the graphite positive electrode is a lithium-containing transition metal oxide such as LiMn 2 O 4 .

Advantages of lithium-ion batteries:

1. The working voltage is high. Lithium-ion batteries operate at 3.6V, which is three times the operating voltage of nickel-cadmium and nickel-metal hydride batteries.
It is higher than energy. The specific energy of lithium-ion batteries has reached 140Wh / kg, which is three times that of nickel-cadmium batteries and 1.5 times that of nickel-hydrogen batteries.
3. Long cycle life. At present, the lithium ion battery has a cycle life of more than 1000 times, and can reach tens of thousands of times at a low discharge depth, exceeding several other secondary batteries.
4. Self-discharge is small. The monthly self-discharge rate of lithium-ion batteries is only 6-8%, which is much lower than that of nickel-cadmium batteries (25-30%) and nickel-hydrogen batteries (30-40%).
5. There is no memory effect. It can be charged as needed without degrading battery performance.
6. No pollution to the environment. There is no harmful substance in the lithium-ion battery, which is a veritable “green battery”.

Lithium polymer batteries are a new generation of batteries that entered the market in 1999. A lithium polymer battery is essentially the same as a lithium ion battery except that the electrolyte is a solid polymer rather than a liquid electrolyte.
The polymer electrolyte material is a general film composed of a solution in which an oxide of a host polymer such as polyethylene is used as a non-movable solvent.

Advantages of lithium polymer batteries:

1. Can be made into any shape and relatively light. Because it does not contain heavy metals and has a plastic shell that prevents electrolyte leakage. 2. Good performance and safer. The solid electrolyte acts like a sealing gel and does not easily disintegrate naturally during charging.