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How to Choose Batteries for Medical Devices?

medical

Modern switching mode power supplies are used in a variety of medical devices, including MRI, X-ray, CT and PET scanners, blood analyzers, DNA equipment, patient monitors, ultrasounds, robotic surgical equipment, cardiopulmonary machines, diagnostic equipment, and automated pharmaceutical dispensers, to name a few. As with all electronics, the trend in medical devices is to make them smaller, lighter, more efficient, more reliable and more competitively priced. Safety standards for medical equipment depending on the application, proximity to patients and operators, and the location and environment of the equipment.

In the design of medical electronic devices, one consideration takes precedence over all others: the safety of the patient and the operator. In some cases, it may be tempting to think that a power source that has been designed and certified for industrial use might also be suitable for medical battery. Often this is not the case, as the risks involved vary greatly.

In addition, many electronic devices used in hospitals (such as patient monitors) operate with very low levels of signals. Medical devices like these tend to be more sensitive to electromagnetic interference (EMI) than most devices used in industry, making EMC (electromagnetic compatibility) compliance and performance a key issue in medical applications.

Protect patients and operators

Hospital patients are often in a vulnerable state. Exposure to even small leakage currents can have adverse effects on their health. The same small leakage current has little effect on healthy people and may be acceptable in industrial applications. Depending on the application, the “permissible leakage current” of the resulting medical device (not just the power source) can range from A few microns (microamps) to A few hundred.”Leakage current” can be defined as an unexpected and potentially harmful current that can pass through the body. Obviously, medical devices that have direct physical contact with patients must limit their leakage current to a specified minimum level.

patients and medical staff

Medical power safety standard

Medical requirements differ from standard power supplies. For example, the enhanced or double insulation in a 240Vac power supply must be able to withstand a dielectric test of 4kVac for medical applications, while the corresponding figure for ITE/industrial USES is only 3kVac.As with spacing, this difference must be taken into account when selecting a power supply. A power supply approved below 4kVac May be used as part of an enhanced barrier for medical applications provided that insulation within the power supply is considered to be a smaller “basic” or “supplementary” barrier. In this case, additional isolation must be provided within the terminal product medical device through the device. The manufacturer shall meet the requirements of strengthening the barrier between the ac power supply and the patient.

Tips for selecting a medical battery

Modern medical devices require compact, lightweight, efficient, economical, RoHS compliant, reliable and ultra-safe power sources. Switching mode power supplies can meet all these requirements, but not all power supplies are the same. Medical equipment OEMs should pay attention to selecting power sources from reputable suppliers, preferably with mature experience in the medical electronics field and a full understanding of the special requirements and changing standards of the professional industry.

Obviously, it is foolish to choose a medical battery based on the lowest price, because the high cost of potential legal action, product recalls, brand name damage and warranty repairs far outweigh any potential cost savings on the front end. Medical OEMs should also take care to ensure that their selected power sources are fully compliant and certified to the current version of IEC, EN, UL, and CSA medical safety standards. Taking these precautions will make it easier for new medical devices to be certified by responsible safety agencies and the FDA.

Customized batteries for medical devices

Lithium batteries have the advantages of high energy density, small size, lightweight, long life, good battery capacity maintenance, wide operating temperature range, and other advantages, to meet the requirements of portable medical equipment lightweight, mobility.

As the world’s leading designer and manufacturer of the custom batteries for more than 20 years. Grepow Battery continually devotes our resources and efforts to developing higher performing & critically reliable rechargeable batteries for medical devices. Lithium batteries for medical devices produced by Grepow have complete safety protection circuit, equalization circuit and battery management unit (BMU), and the combination of multiple serial lithium batteries is strict with high consistency. The product has been tested under different temperature, current, shelf life and other conditions, including various abuse tests, to ensure the safety performance of the battery.

Medical instrument lithium battery pack is widely used in the B ultrasound machine, ECG monitor, infusion pump, ventilator, anesthesia machine, light curing machine, physical therapy, rehabilitation instrument and so on.

Novel medical battery

Based on the advanced technology, stringent quality control, and cost competitiveness, it is able to offer a wide range( -40 ℃~50 ℃ or 20 ℃~80 ℃) of quality batteries to meet customers’ ever-growing demands for higher performance, higher energy density, safer, lighter weight and 1000 cycles life. Custom shaped batteries to fit into any and all available space in your product for maximum efficiency.

Grepow has passed IS09001, ISO14001, TS16949, OHSAS18001 quality system certification, and our products can pass ROHS, CE, UL, UN38.3, MSDS, and other certification. If you need any product certifications, please let us know and we can help to apply for the certification for you.

certification

So far, Grepow sales network covers all areas of China, most areas of Asia, Europe, America, Austria, and some areas of Africa. They also have established offices in Xinjiang, Germany, and the U.S.A. to provide better service to their customers for delivery efficiency and after-sales service.

If you are interested in our products, please don’t hesitate to contact us at any time!
Email: info@grepow.com
Grepow Website: https://www.grepow.com/

Jaw Crusher Installation Points

The jaw crusher for coarse and medium crushing is mainly used in the mining, building materials, infrastructure, and other industries, with simple structure and reliable work. Correct installation and standard operation are the basis for stable operation of the equipment.

The jaw crusher is usually installed on the cement foundation. Because the vibration of the crusher is large, the foundation of the crusher needs to be isolated from the foundation of the factory. When assembling the crusher, the crusher frame must first be installed on the foundation. Then install the other components in order.

When installing the crusher frame, some things that can absorb vibration, such as hardwood, rubber, etc., should be placed between the frame and the concrete. The installation of the frame on the foundation or the horizontal and vertical level on the wooden seat should be met. Equipment installation requirements. When performing rack mounting, the horizontal and vertical levels placed on the foundation should be less than 0.2 mm.

Before the shaft and bearing assembly, the sliding bearing needs to be researched and then placed in the sliding bearing housing, and the horizontality and coaxiality of the placement are detected by using the level. If the measurement result meets the requirements, install the eccentric shaft on the bearing and view the fit between the shaft and the bearing by applying red dan powder on the journal.

If the surface of the plain bearing is too high, further scraping is required until the high point between the contact surfaces disappears. Finally, a certain amount of lubricating oil is applied between the bearing housing and the bearing to reduce shaft wear, eccentric shaft sliding and The contact area between the racks should be no less than 80%, and the gap between them should be less than 0.07mm.

After the above part is installed in place, the connecting rod can be installed. Before the connecting rod is assembled, the position of the connecting rod and the required assembly should be carefully checked. After the problem, the connecting rod is lifted by the train, using gasoline or kerosene to the whole connection. The rod is cleaned and a layer of oil is applied to the surface of the connecting rod after cleaning to ensure that it is lubricated.

Then the upper bearing, the main shaft, the upper bearing and the upper casing of the connecting rod are assembled, and then the connecting rod is hoisted, and the connecting rod bolt is attached to the connecting rod and tightened, for example, after the upper shell of the connecting rod and the connecting rod are padded, If the fit is not tight enough to cause oil leakage, the gasket should be processed or a new gasket should be re-installed. If conditions permit, the rod and spindle parts can be assembled externally and then driven into the machine. In the rack.

The ribbed rib can be removed by loosening the tension spring nut, then removing the spring, and then using a chain or a wire rope to smash the lower part of the shovel, and then pulling the wire rope by the driving, so that the moving cymbal is close to the fixed raft, and then the rib is automatically drop off, just repeat the above steps in the installation.

Firstly, the moving parts are assembled accordingly, and the moving jaws, moving shafts, movable plates, rib pads, etc. are assembled on the ground, and then the assembled parts are hoisted together in the crusher by using a crane or a crane.

For plain bearings, it is necessary to first study the bearing and the bearing housing to install the sliding bearing in place, and at the same time, the coaxiality and inclination of the sliding bearing assembly are detected, and the inclination is guaranteed to be 0.2 mm, coaxiality. It is less than 0.06 mm to complete the assembly for the moving jaw.

The jaw crusher tooth plate is a component used directly for crushing ore. Its structure is simple, but it often needs to be replaced due to frequent contact with the ore. The cross-sectional structure of the tooth plate has a smooth surface and a lattice type surface due to its weight is large and needs to be made into an easily replaceable structure.

The tooth plate is fixed by bolts or wedges. It is fixed on the front wall of the frame or the movable jaw. The contact surface between the two must be straight. If there is a high point of contact, it needs to be processed in time. Since the inner side of the front wall of the frame is not machined, a soft metal gasket is placed between the back of the fixed tooth plate and the front wall of the frame to ensure the tightness of the combination.

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Wearable Device Power Solution

Wearable

Wearable technology engineers and designers face the same challenge all the time — how do you design a battery, which is often the largest single component of a wearable device, to keep it beautiful and functional? Batteries are heavy. They are clunky and unwieldy – but they are essential to keeping every technology going.

What is Wearable Power?

Unfortunately, when we jog, we can’t plug in the power, so battery power is an absolutely essential part of any wearable technology. Our smartphones need charging, our fitness trackers, our wearable cameras and camcorders. Without power, we can tie wearable gems to our legs and wrists. This is where wearable battery come in. The wearable battery is connected to the wearer’s clothing or straps and provide the same amount of energy as they do for other wearable technologies. They are small, light, unobtrusive, and carry enough power to power all your wearable devices.

In wearable devices, the battery is usually very small (for example, 100 mAh), and the device takes several days or even weeks without charging, so power consumption is a key design consideration. Therefore, high power conversion efficiency will be a key design element.

Stylish wrist-worn wearable devices need to be kept to a minimum size in order to maintain their cool features. This drives a high level of full device integration including batteries. In addition, wearable devices can employ a novel battery.

The Biggest Challenge For Wearable Tech

1. The battery intelligent management system should have almost all types of safety design, including overvoltage protection, overcurrent protection, overtemperature protection, short circuit protection, and low-temperature charging, even when the power solution size must be kept very small. is also like this.

Smart wearable devices

2. Because the wearable battery is small, the need for charging accuracy is increased, making charging these small batteries is not an easy task. The charger must be able to provide a smaller charge cut-off current. In other words, the accuracy of the charger should be higher, up to mA level. For example, in a smartphone system, the normal charging current of a 2,000 mAh battery is 1.2 A (0.6 C), and the charging cut-off current should be 1/10 to 1/20 of the normal charging current, that is, 120 mA to 60 mA.
However, in the bracelet, since the battery capacity may be 100 mAh, the normal charging current will be 60 mA, and the charging cut-off current should be 6 mA to 3 mA. Charger devices that meet this requirement are difficult to find.

3. Wearable devices should have a long battery life. Often, consumers are not happy if they charge their devices every day. In the current situation where many of the best smartphones have to be recharged in a day or two, end users are clearly looking forward to improvements. The entire power management should be able to provide a highly efficient power supply.

4. In wearable devices, the failure point of many products is the charging/signal connector because of the relationship between humidity and corrosion.

Wearable Power Products

In response to these design challenges, Grepow batteries have taken corresponding measures to gradually solve the battery runtime requirements based on their cutting-edge battery production technology. We need to use a novel battery while using a wearable device. The novel battery power density is increased in that it takes longer to convert to available power.

Novel battery

With the great success of wearable applications such as smart shoes and Bluetooth headsets, small batteries have become the decisive choice for wearable devices. Wearable devices can be used in any area, and some battery designs are limited to size or special shape requirements. Grepow wearable battery has a small size, irregular shape, wide application temperature range (-40 ° C ~ 50 ° C or -20 ° C ~ 60 ° C), etc., is a customer custom power solutions, is also a development trend.

If you are interested in our products, please don’t hesitate to contact us at any time!
Email: info@grepow.com
Grepow Website: https://www.grepow.com/

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How Does Cold Weather Affect Batteries?

cold weather

In the low-temperature environment, the chemical reaction rate becomes slower, the resistance value of the electrolyte becomes larger, the lithium-ion traversing performance becomes worse, the activity decreases, and the discharge current becomes smaller, resulting in a decrease in the usable capacity of the battery. Lithium batteries consume a lot of power at low temperatures, which is actually the illusion of everyone. The essence is that the battery capacity of the lithium battery itself is reduced.

Electrical conductivity and material activity in the cell

Experimental data: The power consumption of the same mobile phone at -5 °C is 1.7 times that of 20 °C. The essence is that the current of the lithium battery becomes smaller and the available capacity is reduced.

When the mobile phone detects that the battery capacity is low, and the ambient temperature is low, resulting in a small current, the temperature protection circuit in the battery built-in protection board is activated, and the mobile phone will automatically shut down. When the ambient temperature returns to the normal value and the temperature protection circuit are turned off, the mobile phone can work normally.

In order to avoid the above situation, in the low-temperature environment, it is best not to use the mobile phone for a long time. When you go out, you should put the mobile phone in your pocket, pack and other places where you can keep warm. You can also buy a thick mobile phone case for your mobile phone to keep warm.

low temp battery application

In fact, condensed water is more serious than low temperature. Returning from the cold outside to the indoors, the warm air in the room condenses in the cold, and water vapor is generated on the mobile phone. If water vapor enters the motherboard, the phone will get wet, crash or fail to boot. Therefore, in the case of a large temperature difference, avoid the phone is exposed, if you have to talk, you can plug in the headset.

In fact, many factors will affect the mobile phone battery, but the temperature has the greatest impact on the battery. The impact of low temperature on the mobile phone battery is mainly manifested in three aspects. First, as mentioned above, it will affect the conductivity and material activity in the battery. To reduce the battery capacity, secondly, the low temperature easily causes the circuit board to form a mist and cause a short circuit. In addition, the battery is affected by the low-temperature environment for a long time.

If it is only studied from the viewpoint of capacity, the electrolyte used for the lithium battery acts as an organic liquid, like grease, and becomes viscous or even condensed at a low temperature. At this time, the activity of the conductive lithium salt is greatly limited in the inside, so that the charging efficiency is very low, which may cause the lithium battery to be charged slowly at a low temperature, and the charging is not full, and the discharge is also the same.

The perspective of battery capacity

Although the normal operating temperature of the mobile phone battery is relatively wide, as the temperature is lowered, the discharge performance of the lithium battery will be significantly reduced, the discharge platform will be significantly reduced, and the discharge capacity will be significantly reduced. However, because of the different battery performance of different brands, there is a certain difference in low-temperature resistance. Therefore, some users say that the capacity change of a battery with a capacity of 3000 mA at 30 degrees in a low-temperature environment is unpredictable but generally Say, as long as the temperature is above zero degrees Celsius, the available capacity of the mobile phone battery will not drop significantly.

low temperature shaped battery

In addition, it seems that there is no official data on the influence of temperature on battery capacity on the Internet. Only the capacity performance of a certain brand battery affected by temperature can be found. You can refer to When the temperature drops to -30 °C, the discharge capacity of the battery is the room temperature discharge capacity. 87.0%, the average discharge voltage is reduced by 0.598V compared with room temperature, and the stored energy is only about 70% of the ordinary environment. The constant current charging capacity of the lithium-ion battery is only 14% of the total charging capacity, and the constant voltage charging time is It will also become very long.

It can be seen that the effect of extremely low temperature on the battery is very large, but it is not as exaggerated as we think. It is estimated that the temperature should be below 10 degrees and the battery capacity should be more than 90% efficient. If you can avoid exposing your phone to a low temperature when you are at a low ambient temperature, try to keep your phone’s operating temperature above zero degrees Celsius. After using it for a while, the mobile phone’s own heat will gradually work.

Custom low-temperature battery

Grepow low temperature battery can effectively improve the discharge performance of the battery in the low-temperature environment, reduce the internal resistance of the battery, and achieve the effect of high rate discharge. Therefore, its battery life is longer and its power is stronger. This is also one of the core technologies of Grepow, which has the following advantages:

Wide operating temperature range, -40 ° C to 50 ° C. Compared with traditional Li-Polymer batteries, it has broken through the discharge temperature limits of -20℃ to 60℃.

Low Temperature Shaped Battery

High performance of discharge at low-temperature, the lowest one is able to discharge over 60% efficiency @0.2C at -40℃, and discharge over 80% efficiency @0.2C at -30℃.

Flexible size, the battery can be designed according to customer’s size. For example, irregularly shaped batteries:

 ●Ultra Thin BatteryCurved BatteryRound batteriesTriangle BatteryHexagon BatteryUltra Narrow BatteryC Shape BatteryD Shape BatteryPolygonal Battery 

Can be widely used in cold climates and military products. With the ability to mass production, cell consistency is good.

How Long Will the Watch Battery Last?

smartwatch

In life, we can often meet people around us will ask how long the watch battery can last? This is a universal image. In the watch world, almost all watches except the robot need to be replaced. The battery is the source of the movement. Without power, the watch will naturally not turn. The same is true for smartwatch battery. Therefore, I will share some knowledge about the battery below, maybe I can help you!

How long does the battery watch last?

Normally, the life of a new battery is usually two years. However, under normal premise, if the inside of the watch is damp or the pointer jumps too fast, the battery life will naturally shorten. This time period is usually one and a half years. For some smartwatches, if the user frequently calls or sends information, etc., these will consume a lot of power, so the battery life will be very short.
In addition, there are some batteries of better quality, and their service life will last for several years. This is also to see what kind of watch everyone buys.

smartwatch battery

How much does it cost to replace the battery?

If it is an ordinary watch, it usually takes only ten yuan to replace the battery. Regular storefronts generally do not charge fees. You only need to buy a battery and let the staff help you replace it. On the contrary, if your watch is a brand name watch, then the price will naturally not be cheaper, and the model price will be higher.

How to maintain the watch battery?

Although the battery of the watch is installed inside, it does not mean that you can use it without any will. Especially in the case of a shower, it is better to not wear a watch, because the watch is very susceptible to moisture because it is often exposed to moisture. Be aware that once the interior is wet, the battery is prone to short circuits or power outages. Everyone should pay attention to this. But nowadays some smartwatches are waterproof, so don’t worry.

Smart Watch Battery

Customized watch battery for more working time

Smartwatch is generally round in shape with a diameter between 42 to 45mm.  Although they are in round shape, most of them still use square-shape batteries which do not utilize the entire space of the watch they power. In contrast, customized battery created by Grepow better fit into the empty spaces in watches and also increase the maximum capacity available.

Furthermore, Grepow provides solutions for high discharge rates and high voltage cells, high energy density battery for the smartwatch. Low-temperature cells can also be manufactured so that they can work even at -40℃.

Grepow is ultimately a one-stop-shop for customization services.  Customers need only focus on the design of the product, and Grepow will provide the best solution for their specific battery systems.

If you are interested in our products, please don’t hesitate to contact us at any time!
Email: info@grepow.com
Grepow Website: https://www.grepow.com/

How Long Will the Watch Battery Last?

In life, we can often meet people around us will ask how long the watch battery can last? This is a universal image. In the watch world, almost all watches except the robot need to be replaced. The battery is the source of the movement. Without power, the watch will naturally not turn. The same is true for smartwatch battery. Therefore, I will share some knowledge about the battery below, maybe I can help you!

How long does the battery watch last?

Normally, the life of a new battery is usually two years. However, under normal premise, if the inside of the watch is damp or the pointer jumps too fast, the battery life will naturally shorten. This time period is usually one and a half years. For some smartwatches, if the user frequently calls or sends information, etc., these will consume a lot of power, so the battery life will be very short.
In addition, there are some batteries of better quality, and their service life will last for several years. This is also to see what kind of watch everyone buys.

smartwatch battery

How much does it cost to replace the battery?

If it is an ordinary watch, it usually takes only ten yuan to replace the battery. Regular storefronts generally do not charge fees. You only need to buy a battery and let the staff help you replace it. On the contrary, if your watch is a brand name watch, then the price will naturally not be cheaper, and the model price will be higher.

How to maintain the watch battery?

Although the battery of the watch is installed inside, it does not mean that you can use it without any will. Especially in the case of a shower, it is better to not wear a watch, because the watch is very susceptible to moisture because it is often exposed to moisture. Be aware that once the interior is wet, the battery is prone to short circuits or power outages. Everyone should pay attention to this. But nowadays some smartwatches are waterproof, so don’t worry.

Smart Watch Battery

Customized watch battery for more working time

Smartwatch is generally round in shape with a diameter between 42 to 45mm.  Although they are in round shape, most of them still use square-shape batteries which do not utilize the entire space of the watch they power. In contrast, customized battery created by Grepow better fit into the empty spaces in watches and also increase the maximum capacity available.

Furthermore, Grepow provides solutions for high discharge rates and high voltage cells, high energy density battery for the smartwatch. Low-temperature cells can also be manufactured so that they can work even at -40℃.

Grepow is ultimately a one-stop-shop for customization services.  Customers need only focus on the design of the product, and Grepow will provide the best solution for their specific battery systems.

If you are interested in our products, please don’t hesitate to contact us at any time!
Email: info@grepow.com
Grepow Website: https://www.grepow.com/

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