EUROBIKE 2023 Germany’s National Cycling Congress, which will take place on June 21-25, 2023 in the Kongresshaus (Kap Europa) of the Messe in Frankfurt, will bring municipal decision-makers together with the bicycle industry to share views on mobility solutions of the future.

EUROBIKE 2023 Messe Frankfurt Bright Power Connect to a brighter future

The second edition of Eurobike in Frankfurt am Main (June 21-25, 2023) has exceeded last year’s number of participating exhibitors.

The show’s organising team reports that Eurobike 2023 is now fully booked even though the exhibition space was increased to a total of 150,000 sq m. More than 400 new exhibitors are said to be on board for the second edition of the leading trade fair in Frankfurt.

EUROBIKE 2023 Thanks for meeting us at in Bright Power hall 9.2 booth E11

Bright Power will be an exhibitor, with our company advantage products: Electric Bicycle Battery(Ebike Battery), Solar Energy StoragePortable Power Station, Battery Pack and some of our key team members, ready to share more about our bike battery and our company.Thanks for meeting us at in hall 9.2 booth E11.

EUROBIKE 2023 Bright Power Exhibition Information

This is the event of the year for the ebike industry, and we are looking forward to meeting with suppliers and partners, and networking with potential partners and collaborators.we’re looking forward to sharing that with you both at Eurobike and here on our website, our email newsletter and our social media platforms.You can browse us our website, or follow us on Facebook,Linkedin.

What is a sodium-ion battery?

A sodium-ion battery is a type of rechargeable battery comparable to the ubiquitous lithium-ion battery, but it uses sodium ions (Na+) as the charge carriers rather than lithium ions (Li+). The working principles behind and cell construction of a sodium-ion battery is virtually identical to those of lithium-ion batteries, but sodium compounds are used instead of lithium compounds.

Sodium-ion batteries are currently emerging as a potential alternative to current lithium-ion battery technology due to their lower cost, higher availability, and reduced impact on the environment. Since sodium-ion batteries use cheap and abundant materials—sodium and aluminum rather than lithium and copper—they could be transformative in some applications.

Lithium-ion batteries vs Sodium-ion batteries

Do you think sodium-ion batteries will replace lithium-ion batteries in energy storage and E-bike applications?Let Bright Power share you some sodium ion batteries advantage and disvantages with Lithium-ion batteries.
1.Cost:
Sodium-ion batteries use relatively inexpensive materials such as sodium compounds, and there are 423 times more sodium ions in the world than lithium ions, so sodium-ion batteries will cost less.
2.Performance:
Sodium-ion batteries in energy density, power density, and other indicators are worse than lithium-ion batteries, according to CATL released sodium ion battery, the capacity density reached 160Wh/Kg, and multiplier performance is good, that is, at room temperature 15 minutes charging capacity up to 80%, low-temperature resistance is also better, -20 ℃ environment, there is still more than 90% of the discharge retention rate. The system integration efficiency is 80% and the thermal stability is excellent, The energy density of ternary lithium battery cells can already reach about 300Wh/kg; the energy density of lithium iron phosphate cells is slightly lower, but it is also about 220Wh/kg. The current energy density is lower than the energy density of lithium iron phosphate batteries, but the low temperature and fast charging performance is stronger. CATL Next generation sodium ion energy density will exceed 200Wh/kg.
3.Safety:
Sodium-ion batteries are safer. The higher the current density of lithium-ion batteries the faster the dendritic lithium grows, piercing the internal structure of the battery and causing short-circuit spontaneous combustion. Whereas sodium ion has a low probability of producing dendrites and a low probability of spontaneous combustion.
4.Cycle life:
At present, the cycle life of lithium iron phosphate batteries has reached more than 6,000 times, and the cycle life of sodium-ion batteries announced by CATL can only reach 3,000~4000 times. And According to GREAT POWER, the company has developed a non-negative sodium vanadium phosphate system with an energy density of more than 160wh/kg, while on the product side, it has launched a mass production product with a cycle life of more than 6,000 cycles.
5.To sum up:
sodium-ion batteries and lithium iron phosphate batteries have their own characteristics, in the future for quite a long time, the two battery chemistry systems complement each other, each to meet the application needs of different market segments in cycle life, safety, and lithium iron phosphate equivalent, in multiplier performance, high and low-temperature performance are not weaker than various types of lithium-ion batteries, so it is more suitable for the energy density requirements are not high, but more sensitive to the cost, or the cycle life requirements are relatively The application scenarios with high cycle life requirements, such as light electric vehicles, low and medium range new energy vehicles (below 300 km range), backup power, base station power, power storage, construction machinery, industrial vehicles, etc. In terms of industry chain improvement, product range enrichment, performance maturity, standards development, and market acceptance, sodium-ion batteries still have a long way to go and will take 5-10 years to form a large industry, which will be greatly accelerated by the addition of CATL.

Will sodium-ion batteries replace lithium-ion batteries?

Will sodium-ion batteries replace lithium-ion batteries? Sodium is the second lightest metal element on earth after lithium. From the periodic table of elements, sodium and lithium belong to the same group of elements, and their chemical properties are similar, so theoretically sodium can also be used as lithium Battery. Of course, the atomic radius of sodium is much larger than that of lithium, because sodium atoms have 8 more electrons than lithium atoms, so they naturally grow fat. Once you gain weight, there will be many troubles, such as it cannot be embedded in graphite like lithium, and it is much heavier than lithium, so that the battery energy storage per unit mass is less than lithium.

However, sodium has an advantage — the element sodium is so abundant on Earth that it is thousands of times more abundant than lithium on Earth. There is a lot of sodium in the salt we eat, and there is a lot of sodium in seawater. Because of its abundance, sodium is much cheaper than lithium. In the market, the price of lithium carbonate as a raw material for lithium costs tens of thousands of yuan per ton; while the price of sodium chloride as a raw material for sodium is only a few thousand yuan per ton. Therefore, as a battery, one of the outstanding advantages of sodium batteries compared with lithium batteries is that they are cheap, which is a very core advantage for industrialization.

Other than that, sodium-ion batteries work very similarly to lithium-ion batteries. A sodium ion battery is a rechargeable electrochemical battery that mainly relies on sodium ions to move between the positive electrode and the negative electrode, and uses sodium ion intercalation compounds as the positive electrode material. The manufacturing equipment of sodium-ion batteries is also fully compatible with lithium-ion batteries. The production of sodium-ion batteries can continue to use lithium-ion battery equipment, and the conversion cost is low.

The future sodium-ion batteries is an important support and guarantee for lithium-ion batteries. The main application scenarios of sodium-ion batteries are not only in the field of energy storage, but also in communication base stations, low-end low-speed electric vehicles, electric bicycles, solar street lights and other fields that require low energy density. The high safety of sodium-ion batteries The technical route will be an important supplement to lithium-ion batteries.

How long does an electric bike battery last

1. Lithium battery is light in weight and small in size. Lithium battery electric vehicles have diversified brands before the goal. In terms of power performance, they are similar to lead-acid batteries. It takes 6 to 8 hours to fully charge. According to ~3 batteries, 4 cans, the weight is only 1/ of that of acid batteries. 5 or so, and at present, the general lithium battery protection is 2 years, and the lead-acid battery protection is 1 year.
2. Lithium battery has activation-free feature. Lithium battery is easy to activate. It only needs 3-5 normal charge and discharge cycles to activate the battery and restore the normal capacity. Due to its electrolytic properties, it has almost no memory effect. Therefore, the user’s new lithium battery does not require special methods and equipment during the active process.
3. Lithium battery has memory effect. When charging lead-acid battery and lithium battery, I have always worried about the memory effect of the battery, but the lithium battery of electric vehicles does not have memory, so it is not necessary to use the full charge of the vest battery before.
4. Long service life of lithium battery Lithium-ion battery is charged and discharged at a rate of 1C, and its service life is greater than or equal to 500 times, and the power of the 500th time is 70% larger than that of the copper beam. Discharge at 0.5C and charge at 0.15C, its lifespan is less than or equal to 350 times, and the power is less than or equal to 60%.
5. Wide operating temperature range Lithium-ion batteries for electric bicycles can work in the range of -25 degrees to 55 degrees, and their capacitance can reach 70% of the nominal capacity, while lead-acid batteries can only work in the range of 10 degrees to 40 degrees. Doesn’t work well at -25 degrees.
6. Lithium battery charging time is short, green and environmentally friendly. Since the lithium ion battery of an electric bicycle has the characteristics of high current charging, the charging time only needs 4-5 hours, while the lead-acid battery needs 8 to 10 hours. There is no heavy metal lead that is harmful to the environment, and it is a highly environmentally friendly product.

what-is-the-best-way-to-use-a-lithium-ion-battery

How many years can lithium batteries of electric vehicles be used? I believe that most consumers have said that the life of a lithium battery is 500 times, 500 times of charge and discharge, more than this number, the battery will make a mistake
Does it really prolong the life of the battery if it is fully charged every time the battery is fully charged? The answer is no. The life of a lithium battery is not 500 times, but a cycle of charging and discharging.

what is the best way to use a lithium-ion battery

1.Lithium battery storage

When the battery is not used for a long time, the battery should be disconnected from the vehicle, and some power should be added to the battery at intervals to avoid self-discharge of the battery or over-discharge of the battery due to power consumption of the protection board.

2.Try to use the original charger

In general, don’t change the charger at will when you are not sure. In addition, do not remove the speed limit of the controller. After removing the speed limit of the controller, although the speed of some cars can be increased, it will reduce the service life of the battery.

3.Charge every day

Even if your electric vehicle lithium battery can be used for 2 to 3 days on a single charge, it is recommended that you charge it every day. Because the lithium battery after use is in a shallow cycle state, charging it every day will prolong the life of the lithium battery of the electric vehicle.

4.Timely charging

Because the lithium battery will enter the vulcanization process after it is discharged, if it is charged in time, the non-serious vulcanization can be removed. Therefore, the lithium battery should be charged as soon as possible after use, and the battery should be fully charged as much as possible.

5.Periodic deep discharge

A regular deep discharge of the battery is also conducive to “activating” the battery, which can slightly increase the capacity of the battery. The general method is to fully discharge the battery at regular intervals.

Bright Power introduce Classificaiont of Lithium Batteries.

Lithium battery is a type of rechargeable battery that uses graphite or other carbon materials as the negative electrode and lithium-containing compounds as the positive electrode.
pool. It is a type of battery that uses lithium metal or lithium alloy as the positive/negative electrode material and uses a non-aqueous electrolyte solution.

Let’s first understand the development of lithium batteries:

1981 Published the first patent on lithium-ion batteries.
In 1992, SONY began mass production of civilian lithium-ion batteries.
In 1998, a large number of prismatic lithium-ion batteries were put on the market, occupying a large market share.
In 1999, China began mass production of lithium-ion batteries.

Classification of Lithium Batteries

Bright Power Interpret the Classification of Lithium Batteries for you:

1.Classified by appearance:

Cylindrical lithium battery
Cylindrical lithium ion batteries, the model name is generally 5 digits, the first two digits are the diameter of the battery, the middle
The two digits are the height of the battery, and the last digit 0 represents cylindrical shape, and the unit is mm.
The most commonly used cylindrical lithium batteries:
18650 lithium battery
14500 lithium battery
18500 lithium battery
21700 lithium battery
26650 lithium battery
32650 (32700) lithium battery
Square lithium battery
Square lithium batteries usually refer to aluminum or steel square lithium batteries, which are widely used in surveying and mapping, medical equipment, convenience
Portable Testing Equipment

2.Classified by shell:

Classfied by shell
Steel shell lithium battery
Early lithium-ion batteries were mostly steel cases. Due to the heavy weight of the steel shell, the safety is poor, but the stability of the steel is strong, and the rear
In the recent period, many manufacturers have optimized the design structure of devices such as safety valves and PTCs, greatly increasing their safety performance. while others
Directly replace the steel case with an aluminum case and soft case, such as the current mobile phone battery.
Aluminum case lithium-ion battery
Aluminum shell lithium-ion batteries are slightly better than steel shell lithium-ion batteries due to their lighter weight and safety.
Flexible packaging lithium-ion battery
Due to the advantages of light weight, low mold opening cost and high safety, flexible packaging lithium-ion batteries are gradually expanding their use market share.

3.Classified by cathode material:

There are currently four types of cathode materials used in lithium-ion batteries:
Lithium cobaltate(LiCoO2).
Lithium Manganate(LiMn2O4).
Lithium iron phosphat(LiFePO4).
Nickel cobalt manganese(ternary)lithium (LiNiMnCoO2 or NMC).

4.Classified by Electrolyte:

• Liquid lithium-ion batteries

Liquid lithium-ion batteries use liquid electrolytes, which are organic solvents + lithium salts.

• Lithium-ion batteries polymer

Lithium-ion batteries polymer are replaced by solid polymer electrolytes, which can be “dry” or
It is “colloidal”, and most of them currently use polymer colloidal electrolytes. The polymer matrix is ​​mainly HFP-PVDF,PEO, PAN and PMMA etc.

• All solid Lithium-ion batteries

All solid Lithium-ion batteries is a kind of electrode and electrolyte materials used in the working temperature range are solid,A lithium-ion battery that does not contain any liquid components, so the full name is “all solid electrolyte lithium-ion battery”.

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Lithium-ion batteries, or lithium-ion batteries for short, are a type of rechargeable battery that has become increasingly popular in recent years. The basic design of a lithium-ion battery consists of an anode (positive electrode), a cathode (negative electrode), an electrolyte and a separator.

1. Electrodes: The positively and negatively charged ends of a cell. Attached to the current collectors.
2. Cathode: The positive electrode.
3. Anode: The negative electrode.
4. Electrolyte: A liquid or gel that conducts electricity.
5. Separator: A porous polymeric film that separates the electrodes while enabling the exchange of lithium ions from one side to the other.
6. Current collectors: Conductive foils at each electrode of the battery that are connected to the terminals of the cell. The cell terminals transmit the electric current between the battery, the device and the energy source that powers the battery.

Lithium-ion Batteries working principle is shown in the figure:

Bright Power How Lithium-ion Batteries Work

The anode in a lithium-ion battery is typically made of graphite, which can store lithium ions. The cathode is typically made of a metal oxide, such as lithium cobalt oxide or lithium iron phosphate, which can also store lithium ions. When the battery is being charged, lithium ions move from the cathode to the anode through the electrolyte, while electrons flow through an external circuit and are collected by the positive current collector.

During discharge, the process is reversed. Lithium ions move from the anode to the cathode, releasing energy that can be used to power devices. Electrons flow through the external circuit from the negative current collector to the positive current collector. The separator, which is typically made of a porous material, prevents the anode and cathode from coming into contact with each other and causing a short circuit.

The electrolyte in a lithium-ion battery is typically a lithium salt dissolved in an organic solvent, such as ethylene carbonate or diethyl carbonate. The electrolyte allows the flow of lithium ions between the anode and cathode during charging and discharging cycles.

In summary, the working of a lithium-ion battery involves the movement of lithium ions between the anode and cathode during charging and discharging cycles, facilitated by the electrolyte. This movement of ions creates a flow of electrons through an external circuit that can be used to power devices.

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Bright Power Let’s take a look What is a Lithium-ion Batteries:

Lithium-ion Batteries is an energy storage device in which lithium ions migrate back and forth between the positive and negative electrodes to complete the charging and discharging process. It is one of the most widely used batteries at present, and is widely used in portable electronic devices, electric vehicles, energy storage systems and other fields.

            Lithium-ion Batteries consist of a negative electrolyte and a separator. The material is generally used, lithium lithium nickel cobalt manganese nickel cobalt manganese acid acid acid, iron iron iron phosphoric acid phosphoric acid and other compounds are formed by mixing compounds and solvents, which mainly play the role of conductivity and ion transmission. The diaphragm is used to isolate the positive and negative electrodes, prevent short paths and limit the ion transmission rate.

Bright Power What is a Lithium-ion Batteries

The composition and structure of Lithium-ion Batteries:

Bright Power Lithium-ion Bateries are composed of five basic parts: positive electrode, negative electrode, separator, electrolyte and casing.Learn more about us
1. Positive electrode: The positive electrode refers to the current collector embedded in the positive electrode material, which is mainly composed of oxides (such as LiCoO2, LiMn2O4, etc.) and conductive agents (such as carbon, aluminum, etc.), and its function is to accept electrons and combine with lithium ions to form Cathode material.
2. Negative electrode: The negative electrode refers to the current collector embedded in the negative electrode material, mainly composed of graphite, silicon and other materials, and its function is to release electrons and release lithium ions into the electrolyte.
3. Diaphragm: The diaphragm is one of the core components of the battery. Its main function is to isolate the positive and negative electrodes, prevent short circuits, and allow ions to penetrate. At present, polymer films are mainly used in the market, and ceramic films are also used in a small amount.
4. Electrolyte: The electrolyte is the medium for the transmission of lithium ions, mainly composed of lithium salts and organic solvents, capable of carrying lithium ions, and forming ion channels between the positive and negative electrodes, so that lithium ions can be transported back and forth between the positive and negative electrodes .
5. Shell: The shell is the protective layer of the battery. It is mainly composed of steel shell, aluminum shell, soft bag and other materials. It has the function of protecting the battery core and can withstand certain pressure and temperature changes.

The combination and structure of these parts are different, and different types of lithium batteries can be formed, such as polymer lithium-ion batteries, ternary material lithium-ion batteries, iron-lithium batteries, and lithium iron phosphate batteries.
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An electric-assist bicycle, also known as an e-bike, is a bicycle equipped with a small electric motor and battery that provides assistance to the rider when pedaling. The motor is typically activated by pedaling or by a hand throttle and can help the rider achieve higher speeds or climb hills more easily.

Electric-assist Bicycle Schematic Image

         The amount of assistance provided by the motor can usually be adjusted by the rider through a control on the handlebars, and many e-bikes also come with features like regenerative braking and LCD displays that show the remaining battery life and other performance metrics. E-bikes are becoming increasingly popular as a way to commute, exercise, and explore, as they allow riders to go farther and faster with less effort than a traditional bicycle. thus reducing the pedaling pressure on the rider and making the ride easier and less strenuous. The electric bikes are differentiated by the application or the strength of the assist, with a variety of assist levels to meet the multiple needs of different users.

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