A hybrid motorcycle power system based on planetary gear power split mechanism

Abstract

The application discloses a hybrid motorcycle power system based on planetary gear power split, which comprises an engine, a planetary gear mechanism, a driving motor, a power generator, a wheel, a power battery and a vehicle controller; the planetary gear mechanism is a single-row single-stage planetary gear train structure, which comprises a sun gear located at the center, a plurality of meshed and connected planetary gears are arranged on the outer surface of the sun gear in a circumferential direction, the outer sides of the planetary gears are meshed and connected with an inner ring gear, the whole inner ring gear is movably installed in a wheel hub of the wheel, the planetary gears are fixed on a planetary carrier through rotating shafts, and the planetary carrier is fixedly connected with a hub side plate of the wheel to form an integrated whole; an output shaft of the engine is in transmission connection with the inner ring gear; an output shaft of the driving motor is in transmission connection with the sun gear; and the planetary carrier constitutes a power output end. The motorcycle power system is designed to solve the problems of complicated structure, low efficiency, single mode, high cost and the like of the hybrid motorcycle in the prior art.

Description

Technical Field

[0001] This invention relates to a hybrid power system for motorcycles, and more particularly to a hybrid motorcycle power system based on a planetary gear power splitting mechanism. Background Technology

[0002] Motorcycles, as an important means of transportation, are flexible, convenient, and economical, and have a large user base worldwide. However, traditional internal combustion engine motorcycles suffer from high fuel consumption, severe emissions, and loud noise. While pure electric motorcycles offer zero emissions and low noise, they are limited by battery technology and charging infrastructure, resulting in disadvantages such as short driving range and long charging times.

[0003] Hybrid technology is considered an effective way to solve the energy conservation and environmental protection problems of motorcycles. Existing motorcycle hybrid technologies are mainly divided into three types: parallel, series, and series-parallel. Parallel hybrid technology has a simple structure, but it cannot achieve complete decoupling between the engine and the drive wheels; series hybrid technology can make the engine work at its optimal operating condition, but its energy conversion efficiency is low; series-parallel hybrid technology combines the advantages of the former two, but its structure is complex and its cost is high.

[0004] Patent CN101450663A discloses a hybrid motorcycle with a parallel structure of the motor and engine, but it does not solve the problem of speed coupling between the engine and the wheels. Patent CN102303591A discloses a planetary gear transmission device for a hybrid motorcycle, but it uses a single-motor structure and cannot achieve power splitting and flexible switching between multiple operating modes. Therefore, there is a need for a hybrid power system specifically designed for motorcycles that is compact, cost-effective, and highly efficient. Summary of the Invention

[0005] To address the aforementioned problems, this invention aims to provide a hybrid motorcycle power system based on planetary gear power splitting, thereby solving the problems of complex structure, low efficiency, single mode, and high cost in existing hybrid motorcycle technologies.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A hybrid motorcycle power system based on planetary gear power splitting includes an engine, a planetary gear mechanism, a drive motor, a generator motor, wheels, a power battery, and a vehicle controller. The planetary gear mechanism is a single-row, single-stage planetary gear system structure, which includes a sun gear located at the center. Several meshing planet gears are arranged circumferentially around the sun gear. The outer side of each planet gear is meshed with an internal gear ring. The entire internal gear ring is movably installed in the wheel hub. Each planet gear is fixed to the planet carrier through a rotating shaft. The planet carrier is fixedly connected to the wheel hub side plate as a whole. The engine's output shaft is connected to the internal gear ring drive; The output shaft of the drive motor is connected to the sun gear transmission; The planetary structure is configured as a power output end; The generator motor is rigidly connected coaxially to the engine crankshaft; The power battery is electrically connected to the drive motor and the generator motor respectively; The drive motor and the generator motor are electrically connected; The vehicle controller is used to coordinate and control the operating status of the engine, drive motor and generator motor.

[0007] Furthermore, the ratio of the number of teeth on the internal gear ring to the number of teeth on the sun gear in the above-mentioned planetary gear mechanism, Zr / Zs, ranges from 2.5 to 4.0.

[0008] Furthermore, the optimal value for the ratio of the number of teeth on the internal gear ring to the number of teeth on the sun gear in the aforementioned planetary gear mechanism is 3.0.

[0009] Furthermore, the above system has the following operating modes, which are as follows: In pure electric mode, the generator locks the engine crankshaft and the engine output shaft, thereby locking the internal gear ring. The power battery supplies power to the drive motor, which drives the sun gear. The power is transmitted to the planet carrier via the planet gears, and finally drives the wheels. In parallel drive mode, when the engine starts, the output shaft of the engine directly drives the internal gear ring, and at the same time the engine crankshaft drives the generator motor to work. The electricity generated by the generator motor is used to replenish the power battery or directly supply the drive motor. The drive motor works at the same time to drive the sun gear. The internal gear ring and the sun gear form a dual power through planetary gears, which converge and output at the planetary carrier to drive the wheels. In maximum power mode, the power battery simultaneously supplies power to the drive motor and the generator motor. The generator motor constitutes a third power source, and its output power, together with the engine power, drives the internal gear ring via the output shaft. At the same time, the drive motor drives the sun gear. The internal gear ring and the sun gear, through planetary gears, constitute three power sources that converge and output at the planetary carrier to drive the wheels.

[0010] In the power split mode, the engine's output shaft drives the internal gear ring, and the power is transmitted to the planetary carrier via the planetary gears to drive the wheels. At the same time, the engine's crankshaft drives the generator motor, and the electrical energy generated by the generator motor is stored in the power battery. Energy recovery mode: The engine is not working, the wheels drag the planetary carrier in reverse, and the power is transmitted through the planetary gears and the sun gear to make the drive motor rotate in reverse to form a generator working mode. The generated electricity is stored in the power battery to recover braking energy.

[0011] Furthermore, the aforementioned vehicle controller selects its operating mode based on vehicle speed, battery charge, accelerator pedal position, and brake pedal position, according to the following logic: When the power battery charge is higher than the threshold and the required power is lower than the maximum power of the drive motor, it enters pure electric mode. When the required power exceeds the maximum power of the drive motor, it enters parallel drive mode; When the motorcycle accelerates rapidly, it enters maximum power mode; When cruising at high speeds and the engine is in its high-efficiency range or the battery charge is below the threshold, it enters power split mode. When braking or downhill is detected, the system enters energy recovery mode.

[0012] Furthermore, the preferred value of the preset threshold for the battery charge is 30% of the total charge.

[0013] Furthermore, the aforementioned power battery is a lithium-ion battery pack with a rated voltage range of 48V-96V and a capacity range of 20Ah-60Ah.

[0014] Furthermore, the power battery is a lithium-ion battery pack, preferably with a specification of 72V 45Ah.

[0015] Compared with the prior art, the beneficial effects of the present invention are mainly reflected in: 1. Compact structure and reasonable layout: The planetary gear mechanism and drive motor are highly integrated, making full use of the limited space of the motorcycle and solving the problem of the difficulty in arranging the hybrid power system on the motorcycle.

[0016] 2. High transmission efficiency: Through the power splitting characteristics of the planetary gear mechanism, the speed of the engine and the drive wheel is decoupled, so that the engine always works in the high-efficiency range, which significantly improves fuel economy.

[0017] 3. Multiple working modes: It offers a variety of working modes to adapt to various driving conditions, minimizing energy consumption while ensuring power performance.

[0018] 4. Good cost control: The mature GY6 engine platform and standard electric motor are used to control costs while ensuring performance.

[0019] 5. Superior driving experience: Smooth and shock-free mode switching, quiet and comfortable in pure electric mode, powerful in hybrid mode, and energy recovery mode improves energy utilization.

[0020] 6. High reliability: The system has a relatively simple structure, uses mature and reliable components, is easy to maintain, and has a long service life.

[0021] 7. High scalability: This architecture can be easily expanded into plug-in hybrid or range-extended hybrid electric vehicles to meet different market demands. Attached image description: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural illustration from another perspective of the present invention; Figure 3 A three-dimensional structural diagram of the planetary gear mechanism, drive motor, and wheels; Figure 4 A three-dimensional structural diagram of the planetary gear mechanism, drive motor, and wheel (excluding the wheel hub side panel) from another perspective. Figure 5 A cross-sectional view of the planetary gear mechanism, drive motor, and wheels; Figure 6 This is a three-dimensional structural diagram of a planetary gear mechanism; Among them, 1—engine, 11—output shaft, 2—planetary gear mechanism, 21—sun gear, 22—planet gear, 221—rotating shaft, 23—planet carrier, 24—internal gear ring, 3—drive motor, 31—output shaft of drive motor, 4—generator motor, 6—wheel, 61—hub, 611—side plate, 7—power battery. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the implementation of the present invention is not limited thereto.

[0023] like Figures 1-6 As shown, a hybrid motorcycle power system based on planetary gear power splitting includes an engine 1, a planetary gear mechanism 2, a drive motor 3, a generator motor 4, wheels 6, a power battery 7, and a vehicle controller.

[0024] In this embodiment, the engine 1 is a 150cc single-cylinder four-stroke air-cooled engine (such as the GY6 platform), with a maximum power of 6.5kW@7500rpm and a maximum torque of 9.8Nm@6500rpm.

[0025] The planetary gear mechanism 2 is a single-row, single-stage planetary gear system structure, which includes a sun gear 21 located at the center. Several meshing planet gears 22 are arranged circumferentially around the sun gear 21. The outer side of each planet gear 22 is meshed with an internal gear ring 24. The entire internal gear ring 24 is movably installed in the hub 61 of the wheel 6. The center of each planet gear 22 is fixed to the planet carrier 23 through a rotating shaft 221. The planet carrier 23 is fixed to the side plate 611 of the hub 61.

[0026] In the above planetary gear mechanism 2, the kinematic relationship between the planetary gears satisfies: ns+k⋅nr=(1+k)⋅nc Ts:Tr:Tc=1:k:−(1+k) Where ns, nr, and nc represent the rotational speeds of the sun gear 21, the internal ring gear 24, and the planet carrier 23, respectively; Ts, Tr, and Tc represent the torques of the sun gear 21, the internal ring gear 24, and the planet carrier 24, respectively; k = Zr / Zs is the ratio of the number of teeth on the internal ring gear 24 to the number of teeth on the sun gear 21, with Zr / Zs ranging from 2.5 to 4.0, and its optimal value being 3.0. In this diagram, the number of teeth on the sun gear 21 is set to 20, the number of teeth on the planet gear 22 is set to 20, the number of teeth on the internal ring gear 24 is set to 60, and the gear ratio k = Zr / Zs = 3.

[0027] The output shaft 11 of the engine 1 is directly connected to the internal gear ring 24.

[0028] The sun gear 21 is connected to the output shaft 31 of the drive motor via a spline.

[0029] The drive motor 3 is a permanent magnet synchronous motor. In this embodiment, the drive motor 3 has a rated power of 3kW, a peak power of 5kW, a maximum torque of 9.55Nm, a maximum speed of 10000rpm, and a rated voltage of 72V. During operation, the drive motor 3 can function as a motor to drive the sun gear 21, or it can be converted into a generator to recover energy during braking or downhill driving.

[0030] The generator motor 4 is rigidly connected coaxially to the crankshaft of the engine 1. In this embodiment, the generator motor 4 is a disc-type permanent magnet synchronous motor with a rated power of 1.5kW and a peak power of 2.5kW. The generator motor 4 can be used as a starter to start the engine 1, or as a generator to generate electricity to replenish the power battery 7 or directly power the motor 3. In addition, it can be converted into an electric motor as a third power source in the maximum power mode.

[0031] The above connection method constitutes a complete power splitting mechanism, realizing the decoupling of the rotational speeds of engine 1 and wheel 6.

[0032] The power battery 7 is electrically connected to the drive motor 3 and the generator motor 4, respectively. The power battery is a lithium-ion battery pack with a rated voltage range of 48V-96V and a capacity range of 20Ah-60Ah. In this embodiment, the power battery 7 is a ternary lithium-ion battery pack with a rated voltage of 72V, a capacity of 45Ah, and a total energy of 3.24kWh. The battery management system of the power battery 7 has functions such as overcharge, over-discharge, overcurrent, short circuit, and temperature protection.

[0033] The generator motor 4 is electrically connected to the drive motor 3. When the generator motor 4 is working, the electrical energy it generates can replenish the power battery 7 or directly supply the drive motor 3 for operation.

[0034] The vehicle controller is used to coordinate and control the operating status of the engine 1, drive motor 3 and generator motor 4.

[0035] The above power system has the following operating modes, which are as follows: In pure electric mode, the generator motor 4 locks the crankshaft of the engine 1 and the output shaft 11 of the engine, thereby locking the internal gear ring 24. The power battery 7 supplies power to the drive motor 3, the drive motor 3 drives the sun gear 21, and the power is transmitted to the planet carrier 23 through the planet gear 22, and finally drives the wheel 6. In parallel drive mode, when engine 1 starts, the output shaft 11 of engine 1 directly drives the internal gear ring 24. At the same time, the crankshaft of engine 1 drives the generator motor 4 to work. The electricity generated by the generator motor 4 is used to replenish the power battery 7 or directly supply the drive motor 3. The drive motor 3 works at the same time to drive the sun gear 21. The internal gear ring 24 and the sun gear 21 form a dual power through the planetary gear 22 and are combined and output at the planetary carrier 23 to drive the wheel 6. In maximum power mode, the power battery 7 supplies power to both the drive motor 3 and the generator motor 4. The generator motor 4 is converted into an electric motor to form a third power source. Its output power and the power of the engine 1 drive the internal gear ring 24 through the output shaft. At the same time, the drive motor 3 drives the sun gear 31. The internal gear ring 24 and the sun gear 21 form a three-power source through the planetary gears 22, which converge and output at the planetary carrier 23 to drive the wheel 6.

[0036] In the power split mode, the output shaft 11 of engine 1 drives the internal gear ring 24, and the power is transmitted to the planet carrier 23 via the planet gear 22 to drive the wheel 6. At the same time, the crankshaft of engine 1 drives the generator motor 4, and the electrical energy generated by the generator motor 4 is stored in the power battery 7. Energy recovery mode: Engine 1 is not working, wheel 6 drags planet carrier 23 in reverse, and the power is transmitted through planet gear 22 and sun gear 21 to drive motor 3 to rotate in reverse to form generator working mode, and the generated electricity is stored in power battery 7 to recover braking energy.

[0037] The vehicle controller uses a 32-bit microprocessor to collect signals such as vehicle speed, battery level, accelerator pedal position, brake pedal position, engine speed, and motor speed in real time, and coordinates and controls the working status of engine 1, drive motor 3, and generator motor 4 according to the preset control strategy.

[0038] When the power battery 7 has a charge level higher than the threshold and the required power is lower than the maximum power of the drive motor 3, it enters pure electric mode. Here, the above threshold is generally set to 30% of the total charge of the power battery 7. In practice, the corresponding threshold can be adjusted and set as needed.

[0039] When the required power exceeds the maximum power of drive motor 3, it enters parallel drive mode; When the motorcycle accelerates rapidly, it enters maximum power mode; When cruising at high speed and the engine 1 is in the high-efficiency zone or the power battery 7 is below the set threshold, it enters the power split mode. When braking or downhill is detected, the system enters energy recovery mode.

[0040] The following is a further description of specific embodiments: The vehicle enters pure electric mode when the following conditions are met: remaining battery charge > 30%, vehicle speed < 60 km / h, and power demand < 3 kW. In this mode, engine 1 shuts off and locks the internal gear ring 24. Drive motor 3 drives the sun gear 21 independently, and the power is transmitted through planetary gears 22 and planetary carrier 23 to drive wheel 6. The energy flow path in this mode is: power battery 7 → drive motor 3 → sun gear 21 → planetary gears 22 → planetary carrier 23 → wheel 6.

[0041] During rapid acceleration, the system enters maximum power mode, where the generator motor 4, engine 1, and drive motor 3 simultaneously output power. The power battery 7 supplies power to both the drive motor 3 and generator motor 4. Generator motor 4 switches to electric motor mode, becoming the third power source. Its output power, along with the power from engine 1, drives the internal gear ring 24 via the output shaft 11. Simultaneously, drive motor 3 drives the sun gear 21. The internal gear ring 24 and sun gear 21, via planetary gears 22, combine to form the three power sources, which converge at the planetary carrier 23 to drive the wheel 6. The energy flow path in this mode is: power battery 7 → generator motor 4 → engine 1 → internal gear ring 24 → planetary gears 22 → planetary carrier 23 → wheel 6. Simultaneously: power battery 7 → drive motor 3 → sun gear 21 → planetary gears 22 → planetary carrier 23 → wheel 6.

[0042] Parallel drive mode is entered when the following conditions are met: power demand > 5kW, vehicle speed > 40km / h. At this time, the output shaft of engine 1 and drive motor 3 simultaneously output power, which is then combined and output at the planetary carrier 23. The energy flow path in this mode is: engine → internal gear ring → planetary gears → planetary carrier → wheel; simultaneously: power battery → drive motor → sun gear → planetary gears → planetary carrier → wheel.

[0043] The power split mode is activated when the following conditions are met: during medium-to-high speed cruising (60-100 km / h), engine 1 is in its high-efficiency range or the battery charge is below 30%. In this mode, the output shaft 11 of engine 1 drives the internal gear ring 24. Part of the power drives the planetary carrier 23 through the output shaft 11 to keep the wheels 6 driven, while the other part of the power drives the generator motor 4 through the crankshaft to generate electricity and supply it to the battery 7 for recharging. The energy flow path in this mode is: part of the power from engine 1 → internal gear ring 24 → planetary gear 22 → planetary carrier 2 → wheels 6; the other part of the power from engine 1 → drives the generator motor 4 → power battery 7.

[0044] When a brake pedal signal is detected or a downhill slope occurs, the energy recovery mode is activated: At this time, engine 1 stops working, and wheel 6 reverses the sun gear 21, driving drive motor 3 to work in reverse as a generator to recover braking energy. The energy flow path in this mode is: wheel 6 → planetary carrier 23 → planetary gears 22 → sun gear 21 → reverse driving drive motor 3 to generate electricity → power battery 7.

[0045] The engine 1, planetary gear mechanism 2, and drive motor 3 are integrated into a compact housing located in the middle of the motorcycle. The generator 4 is integrated at the end of the crankcase of engine 1. The power battery 7 is located under the seat. The vehicle controller is located inside the side cover. This arrangement maintains the motorcycle's center of gravity balance and requires minimal modification to the original frame structure.

[0046] The operating process of the above power system is as follows: When the vehicle starts, the vehicle controller detects the charge level of the power battery 7. If the remaining charge is >30%, it enters pure electric mode; if the SOC is <30%, it starts the engine 1 and enters power split mode. During normal driving, the vehicle controller selects the optimal operating mode in real time based on parameters such as vehicle speed and power demand. During rapid acceleration, it enters maximum power mode, where the generator 4, engine 1, and drive motor 3 simultaneously output maximum power, providing strong acceleration performance. During braking or downhill driving, the system enters energy recovery mode to recover energy to the maximum extent. When parked, engine 1 automatically shuts off to reduce idling fuel consumption.

[0047] Through bench testing and real vehicle testing, the hybrid motorcycle power system of this invention achieved the following results: combined fuel consumption: 1.4L / 100km (compared to 3.0L / 100km for a conventional motorcycle of the same displacement), pure electric range: 120km (at a constant speed of 40km / h), 0-50km / h acceleration time: 3.5 seconds (compared to 5.5 seconds for a conventional motorcycle), maximum gradeability: 30%, and energy recovery efficiency: 70% of potential energy can be recovered when going downhill.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A hybrid motorcycle power system based on planetary gear power splitting, comprising an engine (1), a planetary gear mechanism (2), a drive motor (3), a generator motor (4), a wheel (6), a power battery (7), and a vehicle controller; the planetary gear mechanism (2) is a single-row single-stage planetary gear system structure, comprising a sun gear (21) located at the center, and a plurality of meshing planet gears (22) arranged circumferentially around the sun gear (21), the outer side of each planet gear (22) meshing with an internal gear ring (24), the entire internal gear ring (24) being movably installed in the hub (61) of the wheel (6), each planet gear (22) being fixed on a planet carrier (23) through a rotating shaft (221), and the planet carrier (23) being fixedly connected to the hub side plate (611) of the wheel (6) as a whole; The output shaft (11) of the engine (1) is connected to the internal gear ring (24) in a transmission connection; The output shaft (31) of the drive motor is connected to the sun gear (21) for transmission. The planetary carrier (23) constitutes the power output end; The generator (4) is rigidly connected to the crankshaft of the engine (1) on the same axis; The power battery (7) is electrically connected to the drive motor (3) and the generator motor (4) respectively; The generator motor (4) is electrically connected to the drive motor (4); The vehicle controller is used to coordinate and control the working status of the engine (1), drive motor (3) and generator motor (4).

2. The hybrid motorcycle power system based on planetary gear power splitting as described in claim 1, characterized in that: The ratio of the number of teeth of the internal gear ring (24) to the number of teeth of the sun gear (21) in the planetary gear mechanism, Zr / Zs, ranges from 2.5 to 4.

0.

3. The hybrid motorcycle power system based on planetary gear power splitting as described in claim 1, characterized in that: The optimal value of the ratio of the number of teeth of the internal gear ring (24) to the number of teeth of the sun gear (21) in the planetary gear mechanism is 3.

0.

4. A hybrid motorcycle power system based on planetary gear power splitting as described in any one of claims 1-3, characterized in that: The system has the following operating modes, which are as follows: In pure electric mode, the generator motor (4) locks the crankshaft of the engine (1) and locks the output shaft (11) of the engine, thereby locking the internal gear ring (24). The power battery (7) supplies power to the drive motor (3), the drive motor (3) drives the sun gear (21), and the power is transmitted to the planet carrier (23) via the planet gear (22), and finally drives the wheel (6). In parallel drive mode, when the engine (1) starts, the output shaft (11) of the engine (1) directly drives the internal gear ring (24), and at the same time, the crankshaft of the engine (1) drives the generator motor (4) to work. The electricity generated by the generator motor (4) is used to replenish the power battery (7) or directly power the drive motor (3). The drive motor (3) works at the same time to drive the sun gear (21). The internal gear ring (24) and the sun gear (21) form a dual power through the planetary gear (22) and are combined and output on the planetary carrier (23) to drive the wheel (6). In the maximum power mode, the power battery (7) supplies power to both the drive motor (3) and the generator motor (4). The generator motor (4) constitutes the third power source. Its output power and the power of the engine (1) drive the internal gear ring (24) through the output shaft (11). At the same time, the drive motor (3) drives the sun gear (21). The internal gear ring (24) and the sun gear (21) are connected to the planetary gears (22) to form three power sources that converge and output on the planetary carrier (23) to drive the wheel (6). In the power split mode, the output shaft (11) of the engine (1) drives the internal gear ring (24), and the power is transmitted to the planet carrier (23) via the planetary gear (22) to drive the wheel (6). At the same time, the crankshaft of the engine (1) drives the generator motor (4), and the electrical energy generated by the generator motor (4) is stored in the power battery (7). Energy recovery mode: The engine (1) is not working, the wheel (6) drags the planetary carrier (23) in the opposite direction, and the power is transmitted through the planetary gear (22) and the sun gear (21) to make the drive motor (3) rotate in the opposite direction to form the generator working mode, and the generated electricity is stored in the power battery (7) to recover braking energy.

5. A hybrid motorcycle power system based on planetary gear power splitting as described in claim 4, characterized in that: The vehicle controller selects its operating mode according to the following logic based on vehicle speed, power battery (7) charge, accelerator pedal position, and brake pedal position: When the power battery (7) has a charge higher than the threshold and the required power is lower than the maximum power of the drive motor (3), it enters pure electric mode; When the required power exceeds the maximum power of the drive motor (3), it enters the parallel drive mode; When the motorcycle accelerates rapidly, it enters maximum power mode; When cruising at high speed and the engine is in the high-efficiency zone or the power battery (7) charge is below the threshold, it enters the power split mode; When braking or downhill is detected, the system enters energy recovery mode.

6. A hybrid motorcycle power system based on planetary gear power splitting as described in claim 5, characterized in that: The preferred value for the threshold of the power battery (7) is 30% of the total power.

7. A hybrid motorcycle power system based on planetary gear power splitting as described in any one of claims 1-3, characterized in that: The power battery (7) is a lithium-ion battery pack with a rated voltage range of 48V-96V and a capacity range of 20Ah-60Ah.

Images