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Xinghuiyuan High tech Industrial Park, Dalang Town, Dongguan City, Guangdong Province
"Invisible Fuel Tank" for City Cycling: DGPI-EBK-002 Electric Bicycle Downpipe Battery
time：2026-08-11
In the streets and alleys of the city, electric bicycles are evolving from "means of transportation" to "lifestyle". It carries the convenience of commuting, Leisure on weekends and the livelihood of take-out riders, as well as people's expectation of green travel. In the "heart" position of this two-wheel car-frame downtube-the form and performance of a piece of battery pack directly defines the texture and radius of riding. With the design concept of "invisible fuel tank", The DGPI-EBK-002 electric bicycle downtube battery launched by energy gathering new energy integrates high energy density, light weight and aesthetic expression to inject new energy into urban cycling.
I. Downtube embedding: design evolution from plug-in to integration
traditional electric bicycle batteries are mostly mounted on the rear seat or outside the frame. The center of gravity is high, which affects the control and damages the smoothness of the vehicle lines. DGPI-EBK-002 adopted downtube embedded design, hide the battery pack inside the frame downtube and integrate with the body.
W130mm × D185mm × H380mm slender size, after precise calculation, it is suitable for downtube space of mainstream electric bicycles. Battery pack slide into the base through the supporting guide rail, and the lock is fixed. The installation is stable and easy to disassemble. Users can take off the battery and bring it into the room for charging, avoiding the potential safety hazard and Theft Risk of outdoor charging.
Appearance design of "fuel tank" it is energy gathering newAesthetic ingenuity of energy. Battery pack shell adopts streamlined curved surface, matte black background color with red decorative moulding, visually echoing the classic shape of motorcycle fuel tank. This is not only a battery, but also the visual focus of vehicle design-when passers-by cast their eyes, what they see is not an abrupt "battery box", but an industrial artwork.
2.21700 cell: big energy in a small figure
the energy core of DGPI-EBK-002 is 21700 cylindrical lithium battery core.
21700 cell (diameter 21mm, height 70mm) is the "gold size" in the current power battery field-larger than 18650, higher monomer capacity; Smaller than 4680, better process maturity and cost controllability. The new energy source is steel case 21700 cell, compared with aluminum plastic film Soft Pack cell, stronger structural strength, under the vibration and turbulence conditions of electric bicycles, the deformation resistance and puncture resistance are significantly improved.
Ternary lithium system the optimal balance between energy density and charge-discharge performance is achieved. The theoretical energy density of ternary materials (lithium nickel cobalt manganese oxide) is higher than that of lithium iron phosphate, which enables DGPI-EBK-002 to achieve higher endurance in a limited volume. For electric bicycle users, this means a longer single charge mileage-under the standard working condition of 250W motor, it can support 60-80 kilometers of endurance, covering the whole scene of urban commuter and suburban riding.
high charge and discharge performance it is another advantage of ternary system. DGPI-EBK-002 supports fast charging, which can be filled in 2-3 hours to meet the demand of high-frequency users such as take-out riders. The discharge platform is flat, even in a low power state, the power output is still stable, and there will be no "post-half weakness" common in lead-acid batteries ".
3. 4.5kg lightweight: reduce the burden for riding
the vehicle weight of the electric bicycle directly affects the handling flexibility and riding experience. DGPI-EBK-002 control the weight 4.5kg, compared with lead-acid batteries with the same capacity (about 15kg), the weight is 70% lower than that of traditional square lithium batteries (about 6-8kg).
This lightweight result is derived from triple optimization:
cell level, the high energy density of 21700 cell reduces the quantity demand by cell, and reduces the weight redundancy of structural parts and connectors;
structural level, battery pack shell adopts the composite structure of high-strength engineering plastic + aluminum alloy frame, which balances the protective strength and weight;
BMS level, adopting a highly integrated split-Port BMS scheme, the protection circuit, equalization circuit and communication module are integrated into a single PCB to reduce the number of components and the weight of wiring harness.
The weight of 4.5kg means that female users can extract the battery with one hand and charge it upstairs, which means that the vehicle has a lower center of gravity and a more stable overbend, which means that every pedal is lighter and every acceleration is faster.
4. Split BMS: safe-conduct pass in the new national standard era
electric bicycle is a travel tool for people's livelihood, and safety is the bottom line. DGPI-EBK-002 adopted split BMS (battery management system) design, charging port is physically separated from the discharge port, which fundamentally eliminates the security risks caused by misoperation during charging.
BMS function coverage six-weight protection:
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overcharge Protection: automatically cut off when the charging voltage exceeds the threshold to prevent overcharging by drum bag;
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over-release protection: stop when the discharge voltage is lower than the safety line,Protect cell service life;
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overcurrent protection: when the discharge current exceeds the rated value, the current is limited step by step to prevent the motor from blocking and burning;
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short circuit protection: millisecond response to prevent the danger caused by accidental short circuit;
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temperature Protection: real-time monitoring of cell temperature, power reduction at high temperature, low temperature time limit charging;
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balance function: balance cell voltage of each string at the end of charging to prolong the cycle life of the whole package.
More importantly, the DGPI-EBK-002 BMS design meet the requirements of new national standard electric vehicle certification. Under the strict requirements of the new national standard for electric bicycles (GB 17761-2018) on battery safety, electrical safety and fire prevention performance, the new energy source has been selected from cell, BMS function to the whole machine test, and the whole process has been compared with the national standard, ensure product compliance.
V. Wide temperature range adaptation: all-weather riding partners
urban cycling is not dividedSeason, battery pack need to maintain stable output in the heat and cold.
DGPI-EBK-002 discharge temperature range-20 ℃ to 60 ℃, covering the annual climate in most areas of China. In the morning of-10℃ in the north of winter, the battery can still be discharged normally, and the power attenuation is controlled within 20%; In the afternoon of 40℃ in the south of summer, the power of the BMS is automatically reduced to protect against the risk of overheating. Charging temperature range: 0 ℃ to 45 ℃, charging is prohibited at low temperature to prevent lithium evolution, and charging current is limited at high temperature to protect cell.
Storage Temperature: 0 ℃ to 45 ℃ when not in use for a long time, remind users to store the battery in a cool and dry place and keep about 50% of the power to prolong the service life by cell.
DGPI-EBK-002 electric bicycle downtube battery, is the exquisite work of "two-wheel travel energy solution" of energy gathering new energy. It reduces the riding burden with a lightweight design of 4.5kg, supports long endurance with 21700 high energy density cell, improves the appearance of the whole vehicle with the aesthetic design of fuel tank, and guards the safety bottom line of the new national standard with split BMS.
Contact us
Dongguan Juneng New Energy Technology Co., Ltd.
137 5142 6524（Miss Gao）
susiegao@power-ing.com
Xinghuiyuan High tech Industrial Park, Dalang Town, Dongguan City, Guangdong Province
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