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18650 lithium battery assembly 72v50ah method

18650 lithium battery assembled into a 72V50Ah battery pack needs to take the following steps:

Determine the number of batteries needed: A 72V battery pack requires 20 batteries in series (the voltage of each battery is 3.6V), and 5 batteries in parallel (the capacity of each battery is 10Ah).

Purchase a suitable 18650 battery: choose a 18650 battery with a capacity of 10Ah, and ensure that the battery brand, model, voltage, and capacity are consistent.

Test the battery: test the voltage and internal resistance of each 18650 battery, and screen out batteries with similar voltage and internal resistance to form a battery pack.

Connect batteries in series: connect 20 batteries in series, and make sure that the positive and negative terminals of each battery are connected correctly to avoid short circuits.

Connect batteries in parallel: Connect 5 groups of 20 series batteries in parallel. When connecting, make sure that the positive and negative poles are connected correctly to avoid short circuits.

Perform battery packaging: Assemble the battery in the appropriate battery packaging box to protect the battery and ensure safety.

Perform battery test: Before use, the entire battery pack needs to be tested to ensure that it works properly and meets the design requirements.

E-Mail：gongchen@gracecorp.cn

Official Website：www.tefoo-energy.com

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Date：14—16.3.2023 Booth No：Hall3-536 Host ：PT. Global Expo Management (GEM Indonesia) Address： Messezentrum, 90471 Nürnberg - Nuremberg Exhibition Center You can contact us in advance, we warmly welcome you！ E-mail:gongchen@gracecorp.cn https://tefoo-energy.com/contact-us/

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The composition and structure of lithium battery

Lithium batteries are composed of five basic parts: positive electrode, negative electrode, separator, electrolyte and casing.

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.

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.

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.

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 .

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.

E-Mail：gongchen@gracecorp.cn

Official Website：www.tefoo-energy.com

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Battery Selection for Ultrasonic Flaw Detectors

Ultrasonic flaw detector is a portable industrial non-destructive flaw detection instrument, which can quickly, conveniently, non-destructively and accurately detect, locate, evaluate and diagnose various defects (cracks, looseness, pores, inclusions, etc.) inside the workpiece. It can be used in both laboratory and engineering site. Widely used in boilers, pressure vessels, aerospace, aviation, electric power, petroleum, chemical, offshore oil, pipelines, military industry, shipbuilding, automobiles, machinery manufacturing, metallurgy, metal processing, steel structures, railway transportation, nuclear power, universities, etc. industry. Conventional methods of non-destructive testing include direct macroscopic inspection with naked eyes and instrumental testing such as radiographic flaw detection, ultrasonic flaw detection, magnetic particle flaw detection, penetrant flaw detection, and eddy current flaw detection.

The sound wave frequency of ultrasonic flaw detection is 0.4-25 megahertz, and the most used one is 1-5 megahertz, which exceeds the hearing of human ears. Using sound to detect whether an object is good or bad has long been used by people. For example: pat the watermelon with your hands to see if it is ripe; the doctor knocks on the patient's chest to check whether the internal organs are normal; knocks the porcelain bowl with your hand to see if it is broken, etc. Ultrasonic flaw detection has the characteristics of large detection distance, small size and light weight of the flaw detection device, which is easy to carry to the site for flaw detection, fast detection speed, and only consumes couplant and wear probes in flaw detection, and the total detection cost is low. At present, the construction industry market This method is mainly used for detection. The lithium battery of ultrasonic flaw detector is a 14.8V lithium battery pack made of a single 18650 battery cell combined with 4 strings and 2 parallels and then packaged with green plastic. After long-term experimental application, this aluminum shell lithium battery represents the portable lithium battery advanced level. Ultrasonic flaw detector detection can not only be very accurate, but also more convenient and faster than other detection methods, and will not cause harm to the detection object and operator, so it has been more and more popular among people. So how do we choose the ultrasonic flaw detector battery?

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Medical equipment ECG monitor battery

The monitor can monitor ECG, respiration, blood pressure, blood oxygen saturation, pulse and many other physical parameters. It is a device or system that measures and controls the patient's physiological parameters and can give an alarm to abnormal conditions. The monitor is widely used and can be equipped in multiple departments - such as ICU, emergency room, orthopedics, respiratory, obstetrics, neonatology, etc. As a precision medical instrument, the ECG monitor can simultaneously monitor the patient's heart rate, blood pressure, blood oxygen saturation, electrocardiogram, body temperature, respiration and other physiological parameters of the human body. activities have been widely used. ECG monitors can continuously monitor and record ECG data within 24 hours, and capture, analyze and automatically store dynamic change data according to the current data of patients, without the need for real-time monitoring by doctors and patients, effectively reducing the doctor's workload workload. The built-in battery of the ECG monitor is the guarantee for the normal operation of the monitor in emergency situations such as emergency rescue, power failure or patient transfer. It is expensive to replace a built-in battery, and extending the use management of the built-in battery can ensure the safety of the patient, and has the effect of saving operating costs. Every shift should routinely check the built-in battery indicator of the monitor, and make a record at the same time to facilitate the use of other nursing staff. Should avoid long-term unplanned use of external AC continuous wor. Monitors are used frequently in actual work, and the phenomenon of ignoring maintenance is common. Maintenance is often considered only when there are obvious failures, which affects the use of patients and increases the failure of the instrument. Establish monitor use, cleaning, maintenance and repair records, and manage them with special personnel. Carry out functional monitoring before and after use, and only if the performance is good can it be applied. Make records after use and keep them properly. According to the method specified in the instruction manual, the equipment engineer disassembles the machine and cleans the inside of the machine at least once a year to reduce the damage of dust to the internal parts of the machine. You can gently wipe the internal dust with a soft brush, or wipe it with absolute ethanol, and wait until it is dry. Can be installed. Instrument operators should conscientiously implement this system, maintain the instrument well, keep the instrument clean and complete, and ensure the normal use of the instrument. The application of ECG monitor reduces the intensity of clinical nursing work and improves work efficiency. The use and management of the ECG monitor can maximize the performance of the equipment, reduce the impact of human factors on the monitoring effect, ensure the safety of the patient, reduce the work intensity of the nurses, reduce the failure rate and maintenance rate of the ECG monitor, and prolong the life of the patient. service life. Therefore, it is of great significance to standardize the use and management of ECG monitors.

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What products can be used instead of RRC2020?

Currently, there is a global shortage of ventilators, so even companies in other industries are looking to provide manufacturing to meet the necessary demand. To drive new product development in the shortest possible time, RRC Power Solutions now offers a ready-to-use solution for the necessary portable power supply: the Ventilator Power Pack. This package offers several benefits: As the included RRC standard batteries are globally recognized, they can be used anywhere in the world. Many well-known medical device manufacturers already rely on RRC standard battery packs. Typically, it takes several years to develop a medical device and find a suitable portable power solution, and RRC standard batteries can be used without additional development time and cost. Furthermore, the batteries are developed and tested according to the highest standards (ISO13485 + FDA QS.Reg 820) and offer high performance. What should I do if I don’t want to use the RRC2020 battery? Is there a replacement for this battery in China? There is one in China, that is TEFOO ENERGY smart lithium battery pack. Features of TEFOO ENERGY smart lithium battery pack:

Comply with regulatory requirements in multiple regions around the world

Standard SMBus v1.1 interface

Integrated LED state of charge (SOC) indicator

Use Panasonic batteries, which have the highest energy density and stability in the market and meet JEITA charging optimization rules

Comprehensive safety protection functions, such as overcharge, overdischarge, overcurrent, overtemperature, short circuit, etc.

Equipped with equalization function to effectively improve battery life

TI precise power calculation Standard lithium battery packs are widely used in medical equipment outdoor rescue defibrillation monitors, blood pressure monitors, oxygen concentration ECG monitors, handheld ECG monitors, single-lead ECG instruments, etc.

E-Mail：gongchen@gracecorp.cn Official Website：www.tefoo-energy.com

[tefoo-energy]

Advantages of portable medical lithium batteries?

Portable mobile electronic products are becoming more and more convenient. Many industries are gradually paying attention to the mobility of products, and the field of medical equipment is no exception. A few years ago, professional medical personnel could not save lives at the scene far from the hospital, and they could not bring medical equipment to the scene. At that time, the technology of portable instruments was not yet mature. Nowadays, due to the continuous development of lithium battery technology, medical devices such as monitoring instruments, ultrasound imaging equipment, infusion pumps, and cardiac pacemakers can be used anytime and anywhere. Portable medical equipment has become an important field of modern medical care, and medical equipment has stricter requirements on batteries. Compared with other traditional technologies, lithium batteries have many advantages in the application of portable medical equipment. Portable medical lithium batteries What are the advantages?

Good safety performance: For medical equipment, safety is of course the first priority. The lithium battery structure dedicated to medical equipment generally uses aluminum-plastic flexible packaging. This packaging can prevent lithium batteries from exploding and burning, greatly improving safety. sex.

Large capacity: Compared with other types of batteries, lithium batteries have larger capacity.

The internal resistance is very small: through special design, the impedance of the lithium battery can be greatly reduced, the high-current discharge performance of the lithium battery can be greatly improved, and it can meet the needs of high-rate discharge medical equipment.

Ultra-thin thickness: The thinnest liquid lithium-ion battery can be less than 5mm, so there is no technical bottleneck in the medical field, and it can meet various medical equipment.

The shape can be customized: due to the particularity of medical equipment, lithium batteries can meet special customization, and the thickness and shape of the battery can be changed according to different medical equipment to meet the use.

Very light weight: the lightness of the lithium battery makes it a favorite of portable medical equipment. While satisfying the use, it reduces the quality of medical equipment and is more convenient to use.

Therefore, I recommend TEFOO ENERGY standard lithium battery, which is convenient for operators to carry out mobile indoor and outdoor operations. Providing continuous, efficient and stable mobile power supply has become the greatest guarantee for the normal operation of such equipment. The solution uses high-performance batteries, so that the entire battery has the characteristics of high energy ratio, light weight, small size, high cycle life, high safety, and high consistency. The battery is very convenient to use, and the original battery can be directly replaced on site.

E-Mail：zhujingxian@gracecorp.cn

Technical Support：gongchen@gracecorp.cn

Website：Tefoo-energy.com

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Battery Considerations for Handheld Spectrometers？

The battery of the handheld spectrometer is a source of power for the spectrometer to work properly. This article mainly introduces the matters needing attention during the use of the battery of the handheld spectrometer: The following points should be paid attention to when using the handheld spectrometer battery:

Do not open or squeeze the battery of the handheld spectrometer, and do not poke holes in the battery, otherwise it will cause accidental injury.

Never incinerate the battery. Batteries should be placed in an area away from fire or other sources of extreme heat. If the battery is exposed to a particularly high temperature heat source (about 80°C), it may cause an explosion and even cause personal injury.

Do not drop, bump or damage the battery in other ways, because doing so may expose the corrosive and explosive substances inside the lithium battery to the outside.

Do not short-circuit the two ends of the battery. A short circuit can cause personal injury, severely damage the battery, and cause the battery to fail.

Do not place the battery in a humid environment or in rain. Doing so may cause electric shock.

The battery must be charged with an external charger of the DELTA handheld spectrometer or authorized by Olympus.

During storage, please keep the battery power at 40% to 80%. The above are some problems that you need to pay attention to when using the handheld spectrometer battery. You can refer to it.

Therefore, I recommend TEFOO ENERGY standard lithium battery, which is convenient for operators to carry out mobile indoor and outdoor operations. Providing continuous, efficient and stable mobile power supply has become the greatest guarantee for the normal operation of such equipment. The solution uses high-performance batteries, so that the entire battery has the characteristics of high energy ratio, light weight, small size, high cycle life, high safety, and high consistency. The battery is very convenient to use, and the original battery can be directly replaced on site.

E-Mail：zhujingxian@gracecorp.cn

Technical Support：gongchen@gracecorp.cn

Website：efoo-energy.com

[tefoo-energy]

Medical equipment lithium battery pack？

[tefoo-energy]

How to choose battery for Olympus Vanta handheld spectrometer?

Handheld spectrometers typically come standard with two swappable lithium-ion batteries. Before using the battery, to check the battery status of the handheld spectrometer, press the white button on the battery. The length displayed by the green light indicates the percentage of remaining power, with 4 scales of 25%, 50%, 75% and 100%.

At the same time, when using the handheld spectrometer battery, you need to pay attention to the following 10 points:

Do not open or squeeze the battery of the handheld spectrometer, and do not poke holes in the battery, otherwise it will cause personal injury.

Do not incinerate the battery. Keep batteries away from fire or other sources of extreme heat. If the battery is exposed to a very high temperature heat source (above 80°C), it may explode or cause personal injury.

Do not drop, collide or damage the battery in other ways, because doing so may expose the corrosive and explosive substances inside the battery.

Do not short-circuit the two ends of the battery. A short circuit can cause personal injury, severely damage the battery, and cause the battery to fail.

Do not place the battery in a humid environment or in rain. Doing so may cause electric shock.

Only use the external charger of DELTA handheld spectrometer or approved by Olympus to charge the battery.

Only use the handheld spectrometer battery provided by Olympus.

Do not store batteries with a remaining charge of less than 40%. Charge the battery to 40% to 80% before storage.

During storage, please keep the battery power at 40% to 80%.

When storing the instrument, please do not leave the battery in the DELTA handheld spectrometer

E-Mail：zhujingxian@gracecorp.cn Technical Support：gongchen@gracecorp.cn Website：efoo-energy.com

[tefoo-energy]

What is an ultrasonic flaw detection instrument? How to choose a battery?

Ultrasonic flaw detector is a portable industrial non-destructive flaw detection instrument, which can quickly, conveniently, non-destructively and accurately detect, locate, evaluate and diagnose various defects (cracks, looseness, pores, inclusions, etc.) inside the workpiece. It can be used in both laboratory and engineering site. Widely used in boilers, pressure vessels, aerospace, aviation, electric power, petroleum, chemical, offshore oil, pipelines, military industry, shipbuilding, automobiles, machinery manufacturing, metallurgy, metal processing, steel structures, railway transportation, nuclear power, universities, etc. industry.

The lithium battery of the ultrasonic flaw detector is a 14.8V lithium battery pack made of a single 18650 cell that is packaged in green plastic after being combined in 4 strings and 2 parallels.

E-Mail：zhujingxian@gracecorp.cn

Technical Support：gongchen@gracecorp.cn

Website：efoo-energy.com

[tefoo-energy]

Lithium battery solution for medical ventilator。

In modern clinical medicine, the ventilator, as an effective means of artificially replacing the spontaneous ventilation function, has been widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgery, respiratory support treatment and emergency resuscitation. It occupies a very important position in the field of modern medicine. Ventilator is a vital medical equipment that can prevent and treat respiratory failure, reduce complications, save and prolong the life of patients.

A.Design requirements for lithium batteries for medical ventilators: The medical ventilator is a new type of intelligent medical product for medical infusion. Due to the particularity of its application population and environment, the requirements for the battery are also very special. For example, the input and output of the battery must use the same port to ensure the safety of relevant personnel. Easy to operate; the battery must have charge and discharge power instructions, and the power indicator must be always on, so that patients and related personnel can observe from time to time; the battery safety and fire rating must meet the special requirements of medical products, etc.

Lithium battery pack model design requirements: 18650 2S1P 3000mAh 7.4V

Input and output characteristics: The output and output use the same port, and the automatic switching function is adopted according to the special requirements of medical treatment.

Basic characteristics of the protection board: 1) Overcharge protection voltage: 8.4±0.025V 2) Over-discharge protection voltage: 5.5±0.08V 3), battery overcurrent protection value (10ms): 5~12A 4), the finished battery has overcharge, overdischarge, overcurrent, short circuit, reverse charge protection (parameters can be customized according to requirements)

Design requirements for battery cycle life: 300~500 times (national standard charge and discharge standard)

B.Lithium battery design scheme for medical ventilator:

Protection board (PCM): It is mainly a protection circuit designed for rechargeable lithium battery packs. Due to the chemical characteristics of the lithium battery itself, it is necessary to provide protection functions such as intelligent power calculation, overcharge, overdischarge, short circuit, and overcurrent. In order to avoid dangers such as burning and explosion.

Protection IC (Protection IC): The main protection function chip of the design scheme, which monitors the battery cell overcharge, overdischarge, overcurrent, short circuit and other functions online and constantly, so that the battery cell can work in a safe, stable and efficient range.

E-Mail：zhujingxian@gracecorp.cn

Technical Support：gongchen@gracecorp.cn

Website：efoo-energy.com

[tefoo-energy]

Why do medical equipment batteries use lithium batteries?

Lithium battery is a kind of battery that uses lithium metal or lithium alloy as negative electrode material and uses non-aqueous electrolyte solution. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium-ion batteries do not contain lithium in the metallic state and are rechargeable. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. Therefore, lithium batteries have not been used for a long time. Lithium batteries have now become mainstream.

Performance characteristics of lithium batteries：

Long service life, the service life can reach more than 6 years, the battery with lithium iron phosphate as the positive electrode is charged and discharged with 1CDOD, and there is a record of 10,000 times of use;

The specific energy is relatively high. It has high storage density, which has reached 460-600Wh/kg, which is about 6-7 times that of lead-acid batteries;

With high power tolerance, the lithium iron phosphate lithium ion battery for electric vehicles can reach 15-30C charge and discharge capacity, which is convenient for high-intensity startup acceleration;

The rated voltage is high (the single working voltage is 3.7V or 3.2V), which is approximately equal to the series voltage of 3 nickel-cadmium or nickel-hydrogen rechargeable batteries, which is convenient to form a battery power pack;

Light weight, the weight is about 1/5-6 of lead-acid products under the same volume;

The production basically does not consume water, which is very beneficial to my country, which is short of water.

High and low temperature adaptability, can be used in the environment of -20℃--60℃, and can be used in the environment of -45℃ after technical treatment;

Lithium batteries have excellent performance, long life, and safe use, with an energy density of up to 7,000 kilowatts per kilogram (W). And compared with other batteries, its use cost is lower. However, the high temperature of medical equipment and the environment, and the harsh use conditions put forward more stringent requirements on the performance of lithium batteries, which requires the lithium batteries of medical equipment to be further improved in terms of safety and durability, strong capacity release capability, and long service life. So now medical equipment uses lithium batteries.

E-Mail：zhujingxian@gracecorp.cn

Technical Support：gongchen@gracecorp.cn

Website：efoo-energy.com

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