Lithium batteries are highly energy-intensive products. The energy released when a fault occurs is also very large. There are often reports of explosions in mobile phones and notebooks. But everyone is still using, do not panic, after all, those are only in the event of a breakdown, if you want to buy a regular brand, there is security, choose Sungzu! In order to avoid accidents such as explosion of lithium batteries, manufacturers must do the following:

1. Improve the safety of electrode materials

Lithium iron phosphate and ternary composites are considered to be low cost “safe” cathode materials and can be widely used in the electric vehicle industry. For the positive electrode material, a common method for improving safety is coating modification. For example, surface coating of the positive electrode material with a metal oxide can prevent direct contact between the positive electrode material and the electrolyte, inhibit phase transition of the positive electrode material, and improve structural stability, thereby reducing cation disorder in the crystal lattice. Reduce the heat generation of side reactions.

For the negative electrode material, since the surface is usually the most susceptible to thermal chemical decomposition and heat release in a lithium ion battery, improving the thermal stability of the SEI film is a key method for improving the safety of the negative electrode material. The polymer or carbon coating can improve the thermal stability of the negative electrode material by weak oxidation, metal and metal oxide deposition.

2. Improve battery safety protection design

In addition to improving the safety of battery materials, commercial lithium-ion batteries also have many safety protection measures, such as setting battery safety valves, thermal fuses, series positive temperature coefficient connecting components, using heat sealing diaphragms, special load protection circuits and special Battery management systems, etc. are also a means of enhancing security.

3. Improve electrolyte safety

There is high reactivity between the electrolyte and the positive and negative electrodes. Especially at high temperatures, in order to improve the safety of the battery, it is one of the more effective ways to improve the safety of the electrolyte. The addition of functional additives, the use of new lithium salts and the use of new solvents can effectively address the safety hazards of electrolytes.

According to the different functions of additives, it can be divided into the following categories: safety protection additives, film forming additives, positive electrode additive protection, stable lithium salt additives, lithium precipitation additives, current-carrying anti-corrosion additives, and infiltration additives.

In order to improve the performance of commercial lithium salts, researchers have atomically substituted them and obtained many derivatives. Among them, a compound obtained by using a perfluoroalkyl-substituted atom has many advantages such as a high flash point, approximate conductivity, and enhanced water resistance. , is a promising lithium salt compound. Further, an anionic lithium salt obtained by isolating an oxygen ligand with a boron atom as a central atom has high thermal stability.

Only in this way can we ensure the safety of the battery and thus the safety of the users!

Investment details

First: cooperation foreword

Sungzu is an original brand enterprise with its own production plant, design, photography, art and operation team.

Sungzu products are positioned in the high-end simple, stylish, high-end, creative 3c digital / digital applications. Today’s 3c digital industry is a mixture of fish and snakes, and the quality of products is declining. We hope that through our efforts, we can make different products and make different stores.

We need agents that support each other. We need to focus on marketing, optimizing, and making agents.

Second: investment requirements

1. Can strictly follow the company price system (such as repeatedly overstepping the company’s pricing rules, directly stop the cooperation complaint handling)

2. Have certain operational ability, and have time to take care of the store (such as 1 week after the audit is passed, the store is not renovated, there is no order in one week, the background automatically cancels the agency)

3. Tmall / Jingdong / other mall / Taobao c points (2 drills or more) / micro-business

4. Be able to understand and support the company’s promulgated rules (company rules must be established on the premise of maintaining the brand market order and the rights of agents)

third. Other important matters about the agent

1. The company did not provide data packets (believe that if you are good at Taobao, each product should be put on your own with your own thoughts and emotions)

2. The picture is provided. Under normal circumstances, the company does not send pictures to the outside. If you need to make a poster, please contact customer service in advance.

3. Regarding the price, the price system of our company is different from that of other professional companies. We adopt the method of uniform delivery and wholesale price, strictly follow the pricing and quantity requirements of Ali, and the way of freight collection.

(Professional to do the basic is to customize the higher generation price, do membership discount, and earn courier fees)

Forth. About express and logistics information

The default express Shentong Express, other express needs to be calculated according to the specific weight, please contact Shangzu sungzu online customer service.

Agent entrance

1. In the official website of Alibaba’s official flagship store https://sungzu.1688.com/, enter [one generation] and click on the application agent.

2. Certification fill in agency information, including contact information, sales shop links, etc., if the information is not complete, the background is not granted

3. Waiting for review

4. If the audit is approved, open https://www.1688.com/Alibaba.com, log in to your Taobao account – click on my Ali – click on the sold item – click on the customer management on the left hand side – enter the channel management – enter Product management. You can pass the product to your Taobao. (On other websites, you can contact customer service directly)

Contact for details: Generation CommissionerQQ:671823383            phone：0755-29952902            WeChat：sungzu88

When buying a new UPS power supply, in order to ensure that the UPS power supply host can work normally, what problems should be paid attention to during use?

        UPS power supply attention

1. The newly purchased UPS power supply should be charged before use.

During the storage of the UPS power supply, the battery continues to self-discharge and most of its capacity is consumed. If the power is not replenished in time, it will not only affect the normal use, but also shorten the battery life. The method of charging the battery is to connect the batteries in series and charge according to the specific method provided in the battery instruction manual. Usually, constant voltage charging is used. The control voltage of each battery is 2.30~2.35V, and the initial current limit should not exceed 0.25C5A (C5 can calculate the specific value through the rated capacity of the battery) to avoid charging the battery. The charging current is enough for 3 hours and can be put into use. Charging time is 12~24h.

2. UPS power supply should avoid frequent power-on and shutdown

The newly purchased UPS power supply is best turned on for a long time.

3. Even if the battery returns to normal, the UPS power should be restored immediately after use.

In a 25 ° C environment, a fully discharged battery takes 18 to 24 hours. If the energy is not discharged, it can be terminated according to the continuous current.

4. If the user configures the long delay battery pack, the external charger should have both constant voltage and constant current functions.

Chargers with constant voltage should not be used to avoid affecting battery life.

5. Check the floating voltage every month when using UPS power

When the floating voltage of a single battery is lower than 2.20V, the entire battery should be charged equally. The method is: in the environment of 25 ± 5 ° C, the initial current limit should not exceed 0.25 C5A, the constant voltage is 2.35 to 2.40 V, and the charging time is 24 to 48 hours.

In general, lithium-ion batteries have safety problems that appear to be burning or even exploding. The root cause of these problems lies in the thermal runaway inside the battery. In addition, some external factors such as overcharge, fire, extrusion, puncture, and short circuit. Other issues can also lead to security issues. Lithium-ion batteries will generate heat during charging and discharging. If the generated heat exceeds the heat dissipation capacity of the battery, the lithium-ion battery will overheat, and the battery material will decompose the SEI film, decompose the electrolyte, decompose the positive electrode, and the negative electrode. A destructive side reaction such as a reaction of an electrolytic solution and a reaction between a negative electrode and a binder.

1 Safety hazard of cathode material

When the lithium ion battery is used improperly, the internal temperature of the battery is increased, so that the decomposition of the active material and the oxidation of the electrolyte occur in the positive electrode material. At the same time, these two reactions can generate a large amount of heat, causing a further increase in battery temperature. Different delithiation states have a great influence on the lattice transition of the active material, the decomposition temperature and the thermal stability of the battery.

2 The safety hazard of the anode material

The anode material used in the early stage is metallic lithium. The assembled battery is prone to lithium dendrite after repeated charge and discharge, and then pierces the diaphragm, causing short circuit, liquid leakage and even explosion of the battery. The lithium intercalation compound can effectively avoid the generation of lithium dendrites and greatly improve the safety of the lithium ion battery. As the temperature increases, the carbon negative electrode in the lithium intercalation state first undergoes an exothermic reaction with the electrolyte. Under the same charge and discharge conditions, the heat release rate of the electrolyte reacted with lithium-incorporated artificial graphite is much higher than that of the intercalated carbon microspheres, carbon fibers, coke, etc. with lithium intercalation.

3 Safety risks of diaphragm and electrolyte

The electrolyte of the lithium ion battery is a mixed solution of a lithium salt and an organic solvent, wherein the commercial lithium salt is lithium hexafluorophosphate, the material is susceptible to thermal decomposition at a high temperature, and is subjected to a thermochemical reaction with a trace amount of water and an organic solvent to reduce Thermal stability of the electrolyte. The organic solvent of the electrolyte is carbonate. These solvents have a low boiling point and a low flash point, and are easily reacted with the lithium salt to release PF5 at a high temperature, and are easily oxidized.

4 Safety hazards in the manufacturing process

Lithium-ion batteries in the manufacturing process, electrode manufacturing, battery assembly and other processes will have an impact on the safety of the battery. Such as the positive and negative mixture, coating, rolling, cutting or die cutting, assembly, filling of the amount of electrolyte, sealing, chemical and other processes of quality control, all affect the performance and safety of the battery. The uniformity of the slurry determines the uniformity of the distribution of the active material on the electrode, thereby affecting the safety of the battery. The fineness of the slurry is too large. When the battery is charged and discharged, there will be a large change in the expansion and contraction of the negative electrode material, and precipitation of metallic lithium may occur; if the fineness of the slurry is too small, the internal resistance of the battery may be too large. When the coating heating temperature is too low or the drying time is insufficient, the solvent remains, and the binder is partially dissolved, causing some active materials to be easily peeled off; if the temperature is too high, the binder may be charred, and the active material may fall off and cause internal short circuit of the battery.

5 Safety hazards during battery use

Lithium-ion batteries should be used to minimize over-charging or over-discharging during use. Especially for batteries with high monomer capacity, thermal disturbances may cause a series of exothermic side reactions, leading to safety problems.

Direct lightning strikes, inductive lightning and lightning electromagnetic pulses can damage the Protable Solar Generatior power supply. These lightning energy is huge, which also causes some Protable Solar Generatior power sources to stop the fate of being damaged. There are several main reasons:

1. There are two types of UPS with lightning protection installed inside

①Protable Solar Generatior is equipped with unqualified lightning protection device

This manufacturer only symbolically installs a low-power metal zinc oxide varistor MOV to save costs, which only protects small inductive lightning.

②equipped with standard lightning protection device

Some imported UPS and UPS produced by the famous Protable Solar Generatior factory in China comply with the international IEC801-5 standard (suppressing the lightning surge voltage and current surge at the input end of the absorption power supply, the inrush current is 20kA, the pulse voltage is 6kV, and the waveform is 8 / 20μs). These types of Protable Solar Generatior can protect the UPS itself intact and protect other subsequent power supplies and equipment from lightning damage.

Long-term monitoring statistics show that the overvoltage of the general low-voltage overhead line generated by DC lightning strikes can reach 100kV, and the telecommunication line can reach 40~60kV. On unshielded overhead lines, the maximum amplitude of the induced lightning overvoltage is 20kV, and the unshielded underground cable can reach 10kV. It can be seen that even a UPS equipped with a standard lightning protection device is also equipped with an effective high-energy lightning protection device at the front end of its power line (the power distribution room, room, cabinet and box, and the UPS is also damaged by lightning). .

2.Intelligent Protable Solar Generatior, signal interface or remote communication line interface is equipped with missing materials

Some are not equipped with surge circuits, and some are only equipped with low-power surge suppression circuits, which cannot prevent inductive lightning strikes, so their signal or communication line interfaces also become the main channel for lightning wave intrusion.

3.Protable Solar Generatior is installed at the front end of important equipment

When a lightning strikes a low-voltage power line or generates an induced lightning strike on the cable, the overcurrent and overvoltage on the power line pass through the power distribution system, first affecting the UPS. The UPS voltage regulation range is generally 160~260V, three-phase, 320V. ~460V between. It is impossible to prevent the overvoltage range of the 10-20kV lightning shock wave in an instant, so when the lightning strike arrives, it is the first to be hit by the lightning current.

In summary, the Protable Solar Generatiorwithout lightning protection device can be said to have no lightning protection function, and can only be used as a power supply for urban power grid over-voltage or small stray current purification and protection. When a lightning strike occurs, it is first hit; the UPS with lightning protection device cannot fully protect itself, protect the power of other equipment from lightning strikes; direct attack of overhead power lines and signal lines, lightning overvoltage and induced lightning overvoltage are smart protable solar generatior damage. The main reason. Therefore, it is necessary to strengthen the lightning protection measures of protable solar generatior power supply, which is of great significance.