Project Description
36v 20ah lithium ion battery pack for e bicycle
36v 20ah lithium ion battery pack design for for electronic bicycle or scooters. This pack build by high-quality 18650 li ion cells 10 in series. electric bike battery is different from other. This 36 volt pack basicly need to power a 500w bike motor. and CMX ‘s pack will also able to power 1000w motor no problem. With the build in protection pcb. It is easy to charger the pack by any charger at 42 volt.
20ah ebike battery
Specifications
About 36v lithium ion battery pack 20ah
This bicycle battery packs design for e bicycle or scooter. Suitable for motor 500w, 800w and 1000w ebike. The 36v lithium ion battery pack apply with high-quality 10s 18650 cells, system come with built in BMS. Coremax provide custom design with different size to meet fit in different hoverboard and ebike.
36v 20ah lithium ion battery pack structure.
This ebike battery pack build by 10S BMS. can effectively charge and discharge the battery pack . The BMS prevent any battery overcharge, over discharge caused by damage, And can control the battery charge, discharge current，Ensure that the battery pack and applications are not damaged；To ensure that in the event of a short circuit failure when the output off and automatic balance of the application of the battery pack at any time in the best condition. The 36v 20ah lithium ion battery also come with aluminum case. With the aluminum case, can easy just install ot the ebike directly.
Safety and economical
OSM 36 volt 20ah lithium ion brand new ICR18650 cells. 18650 Battery cell is tested before assemble. It does not have toxic chemicals and offers four times the power density at a third of the volume compared to lead acid. For these reasons it’s safe for household use.
Excellent discharge characteristics
With low internal resistance and high, flat voltage characteristics during strong current discharge, which ensures a wider application field. Ebike/hoverboard/e bicycle
Long cycle life
Provids long storage life with few limiting conditions. It offers problem-free charge after long storage, permitting to use in a wide range of different ebike e bicycle motors. It is a perfect li-ion vehicle battery pack.
The battery pack is customized to meet specific needs. It is designed for an IP68 waterproof plastic. The waterproof plastic makes the battery pack well protected in a cleaning system. This model also has a mold holder for the battery pack. The battery pack guarantees you over 600 life cycles before functionality drops and there’s a 2- year warranty on the product after shipment.
36v 20ah lithium ion battery for e bicycle with Charger
Coremax provide the most suitable lithium battery charger with this 36v 20Ah lithium ion battery. Please contact us for more details about charging amps. Normally we provide 2Amps, 3A, 5A and 10A charger with this battery pack. Charging voltage is 42v. Different amps will has a different price.
| Place of Origin | Shenzhen China |
| Model Number | 36 v 20ah lithium ion battery for e bicycle-ebike |
| Brand Name | CMX |
| Type | lithium ion |
| Nominal Capacity | 20 AH |
| Size | 354*138*201mm/ 36v 20ah lithium ion battery size can be customized |
| Nominal Voltage | 36 volt |
| application | e bicycle/ electric scooter ebike & hoverboard |
| Cycle life | 800 cycles with DOD80% |
| Weight | About 4KG |
| warranty time | 12 months |
| Certificate | CE/RoHS/UN38.3/MSDS |
| charging Voltage | 42 V |
| Battery type | lithium ion battery 18650 cells |
| Product name | 36v lithium ion battery for ebike/scooters |
| Color | aluminum case |
What would cause a battery or battery pack not to take a charge?
- Zero voltage battery or zero voltage battery in the battery pack;
Lithium ion battery like polymer or 18650 li ion. They are very sensitive on low voltage. Normally, the battery or battery pack come with BMS, it has the function prevent over discharge. However, the bms circuit could be damaged for some reason. And battery cell fully discharged to 0. In this situation. The battery cell could be damaged permanently.
- Battery pack connection error, internal electronic components, protection circuit abnormal;
- Charging equipment failure, no output current;
- External factors cause charging efficiency to be too low (e.g. very low or very high temperature).
What to do when the battery pack does not charge
Step 1. Check the connections.
It may seem improbable, but the stability of any power connection is limited by its weakest link. Check the contacts and terminals for dirt, oils, corrosion, excessive wear or anything that can hamper a good, stable connection. This includes the battery contacts with application, in the charger, and on the battery itself.
Step 2. Reseat the battery in the devices.
It seems unlikely, but it happens. Some application require a tight fit with the battery and may seem attached when they are not fully locked in place. Make sure the battery is seated properly and the battery pack locks firmly in place when attaching it.
Step 3. Verify you are using the correct battery charger.
Using the wrong charger can not only prevent your battery from charging properly, it could damage your equipment. It can also be potentially dangerous.
Step 4. Check to be sure the charger is plugged in and turned on.
Sound silly, doesn’t it? Well, it isn’t really, because it does happen. It’s one of the easiest mistakes to make when charging a fleet of batteries and one of the simplest to resolve.
Step 5. Reseat the battery in the charger.
Battery seems like it’s connected to the charger when it’s not making contact at all. If it is a drop-in or desktop charger with a pocket or tray, the radio and/or battery may be able to sit in the tray without actually touching the contacts. If it is a plug-in type of charger, the plug may not be fully inserted. Be sure the radio/battery is properly seated or fully connected and the charging indicator light is on.
Step 6. Charge another battery of the same make and model in the charger.
Determine if the issue is really with the battery pack.
Step 7. Swap out the charger.
Sometimes a dead battery is the result of a dead charger.
Step 8. Charge the battery again.
Just to be sure, give it another chance.
Every battery has a limited life span determined by a number of different factors, including but not limited to how and where it is used, how much it is used and under what conditions. There is no set time table before a battery “kicks the bucket”. If your battery has reached its End of Life, it’s time to purchase a new one.
What are the main factors affecting battery life? 3 things you must know.
There are different reason affecting battery cycle life. Here we peak up some Main reasons to explain. So you can have a better understanding and how to take care of your batteries.
Charge the battery:
When selecting a charger, it is best to use a charger with the correct termination charging device (e.g. anti-overcharge, negative voltage differential (-dV) cut-off charging and anti-overheating sensing) to prevent the battery shorten circle-life due to overcharge. In general, slow charging extends battery life more than faster charging. So, we suggest charging a battery with small current go gain longer life cycles.
Discharge:
The depth of discharge is the main factor affecting battery life cycles, and the higher the depth of discharge, the shorter the battery life. In other words, reducing the depth of discharge can significantly extend the battery life. Because
For this reason, we should avoid over-setting the battery to very low voltages.
- When the battery is discharged at high temperatures, it shortens the life of the battery.
- If the design of electronic equipment can not completely stop all current, if the equipment is put on hold for a long time, without removing the battery, its residual current will sometimes cause the battery to be excessively consumed, resulting in excessive discharge of the battery.
- When a battery with different electrical capacity, chemical structure or different charging levels is mixed, and a battery of different ages and sizes, the battery will also discharge too much, and may even cause anti-polar charging.
Storage:
If the battery is stored at high temperatures for a long time, it will attenuate its electrode activity and shorten its service life.
How to charge a 12 volt lithium ion battery
First check what kind of lithium battery you have. There are major 2 type of lithium battery in the market. 3.7v cell and 3.2v cell. And find out the full charge voltage. If the cell is 3.7v. Nomally full charge voltage is 12.6v( 3S lithium ion battery. when fully charged, each cell 4.2 volt). While if it is 3.2v cell. When it fully charged, the voltage is 3.65 volt. 12 volt lithium battery pack fully charged is 14.6 volt.( 4S 3.2 v cell). Make sure your charger voltage is compatable with the 12v lithium battery.
Please note that not all Li-ion batteries charge to the voltage threshold of 4.20V/cell. Lithium iron phosphate typically charges to the cut-off voltage of 3.65V/cell and lithium-titanate to 2.85V/cell. Some Energy Cells may accept 4.30V/cell and higher. It is important to observe these voltage limits.
Important to Lithium battery chargers
Lithium cells (18650, lipos, LiFePo4 etc.) which require the charging cycle CC-CV (constant current, constant voltage). The battery system may work for other types for batteries as well, as long as they wants to be charged with CCCV.
CC-CV varies the voltage to constantly deliver the current set by you. When the voltage reaches the battery’s maximum charge voltage, the current is gradually decreased so that the voltage does not exceed the set value.
3.2v LiFePo4 cells
3.7v Lithium ion cells
Lithium battery Charger guide List
| Nominal Voltage | Battery type | series | Charging voltage |
| 12v | 3.7v lithium ion | 3 | 12.6v |
| 3.2v LiFePo4 | 4 | 14.6v | |
| 24v | 3.7v lithium ion | 7 | 29.4v |
| 3.2v LiFePo4 | 8 | 29.2v | |
| 36v | 3.7v lithium ion | 10 | 42v |
| 3.7v lithium ion | 11 | 46.2v | |
| 3.2v LiFePo4 | 11 | 40.15v | |
| 3.2v LiFePo4 | 12 | 43.8v | |
| 48v | 3.7v lithium ion | 13 | 54.6v |
| 3.7v lithium ion | 14 | 58.8v | |
| 3.2v LiFePo4 | 15 | 54.8v | |
| 3.2v LiFePo4 | 16 | 58.4v | |
| 60v | 3.7v lithium ion | 17 | 71.4v |
| 3.2v LiFePo4 | 20 | 73v | |
| 72v | 3.7v lithium ion | 20 | 84v |
| 3.2v LiFePo4 | 24 | 87.6v |
How long will it take to charge a 36v 20ah lithium ion battery?
This will depends on the battery charger features. The most common 36v charger with charging voltage 42v. If the charging current rated 2A. It may takes 10 hours to fully charge the 20ah lithium ion battery. Of cause, you can use a higher current charger. Like 5Amps. Then the battery could be fully charged by 4 hours. This is the basic calculation. The real time could be slight different
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