22 Years' Battery Customization
Jul 10, 2023 Pageview：317
Modern mobile devices usually rely on the power of lithium polymer or lithium-ion batteries. There is a small but subtle difference between the two technologies: the electrolytes required for ion transport consist of a liquid in lithium-ion batteries and a polymer-based gel-like film in lithium-polymer batteries.?
This makes the polymer variant more flexible, which means that it can also be installed in devices in a curved or angled manner. In principle, however, it doesn't matter what type of battery is installed in your device: if you follow a few basic rules, you can extend its life considerably. That is called a curved battery. It is designed in a bending shape with a certain arc angle. This type of batteries mostly used in custom power solutions for ring-shaped smart wearable devices.
In this guide, we will learn more about this uniquely designed curved battery.
What does a curved battery mean?
The curved battery or c-shaped battery usually refers to the polymer curved battery. It is a type of polymer battery with a curved shape so most people call it a polymer curved battery.
These batteries are minted by Prologium and are built with lithium-ceramic cells. Its advantages are mainly two: they allow you to take advantage of dead space and make the case of the watch or bracelet lighter and narrower, and they also increase the autonomy of the device by between 300 and 500 mAh.
LiPo Battery Capacity:
Capacity indicates how much current the battery can supply and is measured in milliampere hours (mAh). It is a way of indicating the amount of charge measured in milliamps that the battery can supply for 1 hour before it is completely discharged. For example, 1000 mAh LiPo battery would be completely discharged in one hour with a demand of 1000 milliamps. If this same battery had a demand of 500 milliamps it would take 2 hours to discharge it.
Discharge Rate or “C”:
The discharge rate is how quickly a battery can be safely discharged. The faster the ions flow from the anode to the cathode will indicate the speed of the discharge. A battery with a discharge rate of 10C means that it discharges at a rate of 10 times the capacity of the battery, it must be taken into account that the duration of the battery depends on the rate at which you discharge it.
Internal Resistance:
The internal resistance of a LiPo cell is typically 2 to 6 milliohms (0.002 to 0.006 ohms), this resistance increases with battery age decreasing the battery's discharge rate.
What are the characteristics of curved batteries?
- Lifespan: 2 to 3 years or about 500 full charges
- Shapes: They are manufactured in various shapes and sizes
- Efficiency: Better ratio size efficiency than other technologies
- Discharge rate: High discharge rate from 1A to more than 25A
- Cell Voltage: Each cell has 3.7V, and you can find batteries from 1 to 6 cells
What are the main applications of curved batteries?
Curved-shaped batteries are mostly used in a growing number of wearable devices like smartwatches and wristbands. Also, it can be used in consumer electronic devices that provide great capacity and longer usage time.
Care to take into account when using LiPo batteries
- The charging current must not be higher than the nominal charging current of the battery: this can cause overheating and the battery can explode! or can inflate
- The voltage of each cell must not be dropped to a value lower than 3V: if this happens it can damage the battery irreversibly
- For storage: it is recommended that the voltage of each cell be 3.8V, this is guaranteed by the STORE charge function present in some chargers. The storage site must be a place without humidity and without high temperatures, nor should they be exposed to the sun.
- Battery cells must be balanced: when the internal battery cells have different voltages this will force one of the cells to work at a different rate discharging it faster, this can cause the battery to swell and be damaged.
- Charge the battery with a specialized charger: If you charge the batteries with chargers not designed for this, the battery may charge at a higher rate than expected and this may damage it.
- Continuous charging If the battery is charging continuously without discharging it, this can reduce its useful life. Once charged it should be discharged in normal use to about 3.2V and recharged after this.
- Short circuit: if a short circuit occurs by mistake, the battery could catch fire or explode, remember that these batteries can deliver a lot of current and this can cause a fire, so be very careful with their use.
Frequent-Asked Questions:
- Can I use an inflated battery? It is not recommended.
- Can I use an inflated battery? It is seriously NOT recommended, many people do it but the battery could explode and catch fire, also the battery will not be delivering all its performance
- How do I repair an inflated battery? A battery like this cannot be repaired, they are inflated by gases that are generated inside the battery and these can be explosive. Although there are many videos showing how the gas is released, we do not recommend that you do it.
- Why do batteries inflate? It is generally due to electrolytic decomposition, which generates a chemical reaction generating gases that are trapped inside the battery and begin to inflate it, normally this can happen when we have
- Over-discharge: if the cell voltage drops below 3V, this can happen when you use a battery in a robot or in a project and you don't have a way to check the discharge point, it can also happen when you charge it with non-balancing chargers, one cell can be much more discharged than the other.
- Over-temperature: when the battery temperature rises beyond its nominal values (30-40°C at 60°C it can start to deteriorate), or if it is stored in places where the temperature is high (5-25° C ideal temperature).
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