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The King Shark downtube mounted battery pack consists of 40 x Samsung 21700 - 50E (3.7V 5Ah) connected 10 series 4 parallel. The battery packs are assembled using only genuine A-grade cells, sourced from official suppliers. The battery cells and BMS are well protected by tough black ABS plastic casings.
Built into the battery casing is an on/off power button and an LED battery capacity indicator / error indicator. The battery can be locked into position on the bikes downtube and easily mounts to standard bike frames using the water bottle mountings.
The Super Shark 36V 19.6Ah battery pack is supplied with battery base, 2 x keys for locking battery onto base, high current charge plug (approx. 8A rated) and good quality fan cooled 36V 2A (42V output) charger.
Specifications
• Nominal Voltage: 36V • Battery Capacity: 19.6Ah - 706Whrs • Cells: Samsung 21700 - 50E 5Ah • Configuration: 10S 4P • Pack dimensions (mm): 368 L x 95 W x 103 H (see outline drawing in additional images) • Weight: 4.4KG • Protection System: Built-in Smart BMS • Maximum Charge Voltage: 42V • Standard Charge Current: 2A (High current charge plug comes as standard - approx. 8A rated) • Recommended Motor Application: 36V 200W - 750W motor • Estimated Battery Life: Life cycle of 500-700+ charges (1C discharge to 2.75V, 1C charge to 4.2V) • Warranty: Battery warranty 12 months, charger warranty 6 months (subject to user guidelines being followed)
EM3EV Product Description
We finally did it, it wasn’t easy, but we finally developed a Compact 36V Shark Battery with 40pcs of 2170/21700 cells. This a big step forward in every way from the original EM3ev 18650 shark batteries. Using the knowledge and experience we have gained over the years, we have made an even safer battery, with better energy density, with better fusible nickel terminations and an interconnect PCB (with fusing). We also created a new, smarter BMS, with great logging capabilities, with high current, that fits in a tiny footprint.
So why is the EM3ev King Shark, King and why is the latest Shark Family from EM3ev a cut above the rest?
This is why:
• We assemble ALL our batteries in our factory, using custom parts we design and then manufacture on our own CNC machines. We don’t buy from Battery Pack Assemblers that sell at the lowest price to attract buyers, but then have to scrimp on everything, then assemble them as quickly/cheaply as possible, so they turn a profit. We don’t take chances when it comes to our batteries or your safety!
• We only source genuine A-grade genuine cells from the official sources.
• The EM3ev King Shark case is built and designed for 56 cells (the case itself is bought in from our preferred case maker). We were not willing to sacrifice safety and reliability by squeezing 56 cells into the Hailong case, that was only ever intended for a max of 52 cells, which is why we waited until a suitable case was available, before we offered our 52V EM3ev Shark batteries. The only way it was possible for others to offer a 52V battery in the Hailong case, was to discard the standard cell holders and glue the cells together.
• Our EM3ev King Shark uses an in-house designed and manufactured CNC cell holder which keeps everything safe, solid and secure. The quality and construction of the injection moulded case is also (in our opinion) far superior and the slider mountings are on a totally other level to the Hailong. The slider is solidly constructed and even has fixing points that match most water bottle mounts. No drilling holes or adding additional brackets to make it work!
• Every cell in the pack is fused (just like almost all of the batteries we supply). We have been designing and manufacturing (in-house) our own battery terminations for several years already. Cell level fusing, means that in the event of an internal short circuit in the battery (which the BMS cannot protect against), then all that will happen is that some sacrificial links will safely open, preventing any of the cells or cabling from overheating and becoming dangerous. CNC spot welding ensures consistent weld quality and weld position. Finally, our new PCB design offers better internal cable management and routing. Safe by design!
• We use a high tech, fully programmable UL-certified Smart BMS, which is rated for genuine 40A continuous plus, with a programmable over-current trip set to >60A (which is ample for the intended application). Our BMS balances during charging (when charging and when at >50% charge) and therefore doesn’t require a full charge in order to balance. Auto power off function, auto power on and with a pre-charge function (no sparks, so long as the battery is powered off when linked to the controller).
• This is a 3-wire BMS with separate charge and discharge circuits. The charge port doesn’t not output the battery voltage and will avoid sparking if you forget to power on your charger prior to connecting it. We do have a battery parallel balancing device that can be used for running two batteries in parallel under all edge cases. The battery parallel balancing device works from 10S (36V) to 14S (52V). As long as the voltages of the two batteries are the same – eg. both are 14S etc. it will work with all cell types and capacities. The device has a max discharge current of 60A and regen is not permitted. Please contact us if you are interested in this device.
• High current charge plug comes as standard (approx. 8A rated). We don’t use the standard DC2.1 connector (fitted to most of this style of case), that is only rated for 3A and is likely to melt at much more than that.
• We do all this and offer it at our usual low pricing, we don’t charge a premium for Safety and Reliability. Just because we offer low prices, it doesn’t mean we don’t stand behind our product if there is an issue. We have a proven track record of offering great after-sales support and warranty repairs/replacements. We will not leave you stuck (1 year Warranty, with several Support Centres World-Wide). Our batteries are designed to be easily repaired if the need arises.
Features of EM3ev King Shark Case:
• The controller case in the slider (that most do not even use) has been removed, freeing up space to make a 56 cell (52V) battery, without compromises.
• The slider on the King Shark has a metal support and it has fixing points along almost it’s entire length, so you shouldn’t have any trouble to fit it to the standard bottle mounts on most bikes.
• The tabs on the base of the King Shark case are ~5mm thick and well supported. There are 8 of these stronger tabs and they are more evenly spaced along the entire length of the battery.
• Material thickness is ~3.3mm or more and there are numerous supports within the case, to improve rigidity and strength.
• The EM3ev King Shark case is designed for 56 cells, including cell holder and BMS. We design and manufacture the CNC cell holder, so it is a snug fit inside the case.
• We have designed and manufactured custom terminations for this layout, with cell level fusing on every cell, whilst also minimising voltage drop, to make the EM3ev King Shark 1 of the safest Ebike Batteries on the market (regardless of price).
• We have fitted 1 of the most advanced BMS you will find in any Ebike Battery to keep the battery safe, performing 100%, to be reliable for the long-term and to give the user access to data for info and diagnosis.
• Our King Shark comes with a high current charge plug, rated for around 8A.
A little info about EM3ev and their Batteries EM3ev builds battery packs (and design/manufacture most of the key component parts on our own high-tech machines). We have been assembling all our own battery packs since around 2011. We build our own battery packs, as we want to do things right, we want to do everything we can to make our batteries safe and we want to innovate. EM3ev packs are always conservatively/accurately rated with regards to both their capacity and the discharge current they can provide, which will help to ensure our packs provide a long and reliable service life. On top of all this, we stand behind our products (1 year warranty). And WE WILL fix any issues that occur (with minimum inconvenience, no cost to the customer and no we do not ask customers to return parts to China!). Here at EM3ev, we are not about hype, spin and self-promotion, our reputation was built the old fashioned way, by happy/satisfied customers.
Em3ev King Shark 52V Ebike Battery Specs:
• We conservatively rate the cells as 4.9Ah per cell. Although the makers classes them a little higher than this. Like with any Li Ion type battery, best long term performance is obtained by not using all of the available capacity all of the time, and also, by not using the pack at high discharge rates which will cause excessive cell heating and premature aging.
• Cycle Life estimated at 500-700 cycles plus (1C discharge to 2.75V, 1C charge to 4.2V). Cycle life is extended by charging to 90%, limiting discharge to 90%. Our 5A charger has a switch for either 90% or 100% charge, or choose the Satiator for even more control. Our BMS doesn’t need a full charge to balance the pack, it will happily balance the pack with only 80 or 90% charge.
• Cycle Life will be reduced if the Pack is regularly used at continuous high discharge rates (our BMS does have over-temp protection if the battery gets too hot). Therefore, please match the battery pack to the rest of the kit to get the performance and long term usage you expect (see our suggested max discharge current below, for our recommendations).
Recommended Max Discharge Current for Cell Type of the Em3ev King Shark 36V Ebike Battery:
• Samsung 50E: ~39A Continuous, 55A Max Burst Current
Please note we recommend a max of no more than 50A for the BMS. The trip current is set to 60A for 1 second.
Note: the cell manufacturers specs are higher than our recommendations above. It will not harm the battery to occasionally discharge at higher levels than our recommendations, but regular, sustained high discharge rates will degrade the battery more quickly and the battery voltage will sag at these high power levels. The Battery BMS is programmed to trip if cell temperatures reach 60degC during discharge and 45degC during charging.
Capacity Specs for the Em3ev King Shark 36V Ebike Battery: Samsung 50E; 36V nominal, 19.6Ah, ~706Whrs
Note: the above figures are on a new battery in warm weather and at a discharge rate of ~0.5C. Cold temperatures or high discharge rates will result in reduced capacity. Capacity will degrade over time and usage.
Em3ev King Shark 36V Ebike Battery Weight and Dimensions:
• Maximum dimensions of: 95mm width, 103mm tall, 368mm long (See the outline drawing in additional images, for details). Please allow about 18mm forwards and 8mm upwards for the battery to clear the slider that attaches to the water bottle mounts.
• Weight: approximately 3.8g (including slider).
We do not recommend that the battery is fitted upside down. If there is no choice to fit the battery in this manner due to frame design then it would be highly advisable to use additional straps to secure the battery. We do not condone the fitment of the battery in this manner.
Please note that we currently only send battery packs within mainland UK (excluding Northern Ireland)
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