CN216332569U

CN216332569U - High-stability electric power-assisted bicycle three-electric integrated module and electric wheel

Info

Publication number: CN216332569U
Application number: CN202121111714.1U
Authority: CN
Inventors: 王清华; 王英喆; 李国鹏; 杜永杰; 郑田虎
Original assignee: Bafang Electric Suzhou Co Ltd
Current assignee: Bafang Electric Suzhou Co Ltd
Priority date: 2021-05-24
Filing date: 2021-05-24
Publication date: 2022-04-19
Anticipated expiration: 2031-05-24

Abstract

The utility model provides a high-stability electric power-assisted bicycle three-electricity integrated module and an electric wheel, which comprise an outer rotor, a magnetic steel sheet, a stator, a battery module, a wheel shaft, a BMS management system and a controller, wherein the wheel shaft penetrates through a middle shaft of the battery module and is fixedly connected with the battery module, and the BMS management system and the controller are fixed on the wheel shaft; the stator ring is arranged at the periphery of the battery module and fixedly connected with the battery module, a cavity is formed inside the outer rotor, the stator, the battery module and the wheel shaft are assembled in the cavity, the outer rotor extends outwards from two ends of the wheel shaft and is rotatably connected with the outer rotor through a bearing, a plurality of magnetic steel sheets are circumferentially distributed on the inner side wall of the cavity, and a certain distance is reserved between each magnetic steel sheet and the stator. The battery module and the stator are integrally fixed, and when the wheel moves, the battery module is fixed, so that the stability and the safety of the battery are ensured.

Description

High-stability electric power-assisted bicycle three-electric integrated module and electric wheel

Technical Field

The utility model relates to the technical field of electric bicycles, in particular to a high-stability electric power-assisted bicycle three-electricity integrated module and an electric wheel.

Background

At present, the battery is a power source of the electric bicycle and is a key component of the electric bicycle, and therefore, the structure and the performance of the battery directly influence the service condition of the electric bicycle. Because the embedded battery and the rear clothes hanger battery are hidden in the tube, the battery is separated from the controller and the motor, and the defects that the battery occupies a large space and influences endurance and load capacity exist, therefore, the battery, the controller and the motor are integrated on the basis, the battery structure gradually tends to be integrated, and the problems of the battery occupying space, the endurance, the load capacity and the like are solved.

The three current electricity collection moulding piece, battery module place in the inside of three electricity assembly casings, and three electricity assembly casings are fixed relatively with the rotor of motor, and when electric motor rotor rotated, three electricity assembly casings can drive battery module and rotate in step, owing to there is the effect of centrifugal force, and electrolyte is in unbalanced state in the electric core that leads to battery module to influence holistic performance of battery and life.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: in order to overcome the defects in the prior art, the utility model provides a high-stability three-electric integrated module of an electric power-assisted bicycle.

The technical scheme adopted for solving the technical problems is as follows: a high-stability electric power-assisted bicycle three-electricity integrated module comprises an outer rotor, a magnetic steel sheet, a stator, a battery module, a wheel shaft, a BMS management system and a controller, wherein the wheel shaft penetrates through a middle shaft of the battery module and is fixedly connected with the battery module, and the BMS management system and the controller are fixed on one side of the wheel shaft and are positioned inside the battery module; the outer rotor is of a hollow cylindrical structure, a cavity is formed inside the outer rotor, the stator, the battery module and the wheel shaft are assembled in the cavity, the outer rotor extends outwards from two ends of the wheel shaft and is connected with the outer rotor in a rotating mode through a bearing, a plurality of magnetic steel sheets are distributed on the inner side wall of the cavity along the circumferential direction, and a certain distance is reserved between each magnetic steel sheet and the stator. When the external rotor drives the wheel to rotate, the battery module does not rotate along with the rotation of the external rotor, so that the electrolyte of the battery cell in the battery module is also in a stable state, the interference of centrifugal force is avoided, and the stability and the reliability of the battery are improved.

The structure of the battery module is improved along with the change of the connection relation between the battery module and the stator and the rotor so as to meet the requirement of being integrally connected with the stator.

In order to realize the fixation of the BMS management system and the controller and facilitate the wiring between the BMS management system and the battery module, a limiting boss is axially arranged on the outer wall of the shaft sleeve, a notch matched with the limiting boss in shape is arranged on an inner ring hole of the BMS management system and the controller, the BMS management system and the controller are sleeved on the outer wall of the shaft sleeve, and the positioning assembly is realized through the matching of the limiting boss and the notch. BMS management system and controller all are located the inside of battery module, and fixed mounting is on battery support, make whole system's electricity connect whole completion in inside, and the positive negative pole of battery module is direct to be led to BMS management system on, the controller passes through signal line and BMS management system and realizes communication function, has reduced the space that the wiring took, and has shortened the length of wiring, has improved the reliability. In addition, the electric core main module and the controller of the battery module are separated by the inner ring of the battery bracket and are respectively positioned in different areas, and the two modules are isolated from each other, so that the anti-interference capacity is improved.

In order to improve the stability, a reinforcing rib is arranged between the outer wall of the shaft sleeve and the inner annular wall of the annular cavity.

Specifically, the stator comprises a stator support and a stator coil, wherein the inner side of the stator support is connected with the battery support in an integral injection molding mode, and the stator coil is wound on the stator support.

Preferably, a plurality of grooves are distributed on the outer side wall of the battery support along the circumferential direction, connecting ribs are formed between adjacent grooves, the number of the grooves is matched with that of the stator supports, and the end portions of the stator supports are embedded into the grooves during injection molding.

The stator support is the metalwork, and the battery support is the injection molding piece, consequently, in order to guarantee reliable stable connection between the two, mould plastics as an organic whole through the mode of secondary injection moulding, and the middle splice bar is for making better combination of both when moulding plastics.

The utility model provides an electric vehicle wheel, includes foretell three electricity collection moulding piece, still includes outer hub and a plurality of spoke, three electricity collection moulding piece as electric vehicle wheel's interior hub, and coaxial setting is inboard at outer hub, and the spoke is connected between outer hub and interior hub.

The utility model has the beneficial effects that: the high-stability electric power-assisted bicycle three-electric integrated module and the electric wheel provided by the utility model have the advantages that the system is highly integrated, the occupied space is small, the overall structure is stable, the battery does not move along with the circumference of the motor, the battery and the axle are fixed, and the whole system is more stable and safer.

Drawings

The utility model is further illustrated by the following figures and examples.

Fig. 1 is a schematic structural view of an electric wheel of the present invention.

Fig. 2 is a schematic perspective view of a three-electrical integrated module according to the present invention.

Fig. 3 is an exploded view of a three-electrical integrated module of the present invention.

Fig. 4 is a schematic front view structure diagram of a three-electrical integration module of the present invention.

Fig. 5 is a schematic sectional view of a-a in fig. 4.

Fig. 6 is a schematic diagram of the internal structure of the three-electric integrated module.

Fig. 7 is an exploded structure view of the battery module.

Fig. 8 is a schematic structural view of a battery holder and a stator holder.

Fig. 9 is a schematic structural view of a battery holder.

In the figure: 100. the three-electric integrated module comprises a three-electric integrated module body, 200, spokes, 300, an outer hub, 1, an outer rotor, 11, a body, 12, an end cover, 13, a mounting hole, 14, a through hole, 2, a magnetic steel sheet, 3, a stator, 31, a stator support, 32, a stator coil, 4, a battery module, 41, a battery support, 411, an annular cavity, 412, a shaft sleeve, 413, a limiting boss, 414, a reinforcing rib, 415, a groove, 416, a connecting rib, 417, a battery cell cavity, 42, a main module battery cell, 43, an electrode plate, 44, an electrode plate support, 45, a screw, 5, a wheel shaft, 6, a BMS management system, 7, a controller, 8, a left bearing, 9, a right bearing, 10 and a charging port.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

As shown in fig. 1, the electromotive wheel of the present invention includes a tri-electric integrated module 100, an outer hub 300 and a plurality of spokes 200, wherein the tri-electric integrated module 100 is used as an inner hub of the electromotive wheel and is coaxially disposed inside the outer hub 300, and the spokes 200 are connected between the outer hub 300 and the inner hub.

As shown in fig. 2 to 6, the three-electric integrated module 100 is a high-stability three-electric integrated module for an electric power-assisted bicycle, and includes an outer rotor 1, a magnetic steel sheet 2, a stator 3, a battery module 4, a wheel shaft 5, a BMS management system 6 and a controller 7, wherein the wheel shaft 5 penetrates through a middle shaft of the battery module 4 and is fixedly connected with the battery module 4, and the BMS management system 6 and the controller 7 are fixed on one side of the wheel shaft 5 and are located inside the battery module 4; the stator 3 is annularly arranged on the periphery of the battery module 4 and fixedly connected with the battery module 4, the outer rotor 1 comprises a body 11 and an end cover 12, the body 11 is a hollow cylindrical structure with an opening at one end, a cavity is formed inside the body, the end cover 12 is sealed on the opening end, and mounting holes 13 for mutual connection are formed in the body 11 and the end cover 12 and are locked through screws 45; a plurality of through holes 14 are circumferentially distributed at equal intervals on the outer edge of the end cover 12 and the outer edge of one end of the body 11 away from the end cover 12, and are used for mounting the spokes 200; the stator 3, the battery module 4 and the wheel shaft 5 are assembled in the cavity, the outer rotor 1 extends out of two ends of the wheel shaft 5, the left bearing 8 and the right bearing 9 are arranged at the left end and the right end respectively, the left bearing 8 and the right bearing 9 are connected with the outer rotor 1 in a rotating mode, the magnetic steel sheets 2 are distributed on the inner side wall of the cavity along the circumferential direction, and a certain distance is reserved between the magnetic steel sheets 2 and the stator 3. The stator 3 includes a stator support 31 and a stator coil 32, the inside of the stator support 31 is connected with the battery support 41 by integral injection molding, and the stator coil 32 is wound on the stator support 31.

During action, the coil on-off of the stator generates a magnetic field which changes alternately, the magnetic steel cuts magnetic induction lines, so that the outer rotor 1 rotates, the battery module 4 and the stator are integrally connected and are fixed with the wheel shaft 5, and when the outer rotor 1 drives the wheel to rotate, the battery module 4 does not rotate along with the rotation of the outer rotor 1, so that the electrolyte of the battery cell in the battery module 4 is also in a stable state, the interference of centrifugal force is avoided, and the stability and the reliability of the battery are improved.

As shown in fig. 7-9, due to the change of the connection relationship between the battery module 4 and the stator and the rotor, the structure of the battery module 4 is also improved to meet the requirement of integral connection with the stator, specifically, the battery module 4 includes a battery support 41, an annular battery cell main module 42, electrode plates 43 and an electrode plate support 44, the battery cell main module 42 is formed by connecting a plurality of independent battery cells in parallel, and then forms a battery cell secondary module, the positive and negative electrodes of each battery cell secondary module are respectively connected with one electrode plate 43, then the electrode plates 43 of the positive and negative electrodes of different battery cell secondary modules are connected in series to form the battery cell main module 42, and the electrode plates 43 on the same side are supported and fixed by the electrode plate support 44; the battery support 41 is provided with an annular cavity 411 matched with the annular battery cell main module 42, a battery cell cavity 417 is arranged in the annular cavity 411, the battery cell main module 42 is arranged in the annular cavity 411, a battery cell is arranged in each battery cell cavity 417, a shaft sleeve 412 integrally connected with the battery support 41 is arranged in the inner ring of the annular cavity 411, and the wheel shaft 5 is fixedly connected in the shaft sleeve 412 in a key connection mode. In order to fix the BMS management system 6 and the controller 7 and facilitate the wiring between the BMS management system and the battery module 4, a limiting boss 413 is axially arranged on the outer wall of the shaft sleeve 412, a notch matched with the limiting boss 413 in shape is arranged on an inner ring hole of the BMS management system 6 and the controller 7, the BMS management system 6 and the controller 7 are sleeved on the outer wall of the shaft sleeve 412, and the positioning assembly is realized through the matching of the limiting boss 413 and the notch. For improved stability, a rib 414 is provided between the outer wall of the sleeve 412 and the inner annular wall of the annular chamber 411. A plurality of grooves 415 are circumferentially distributed on the outer side wall of the battery support 41, connecting ribs 416 are formed between adjacent grooves 415, the number of the grooves 415 is matched with that of the stator supports 31, and the end portions of the stator supports 31 are embedded into the grooves 415 during injection molding.

Three key components of the tri-electric integrated module 100 of the present invention: the motor, the controller 7 and the annular battery module 4 are integrated into a system module and are arranged on the wheel shaft 5, the three share an assembly shell, the assembly shell is an outer rotor 1 of the motor and does circular motion along with the frequency of the wheel, a stator of the motor and the battery module 4 are integrated, an internal battery is fixed, and the stability and the safety of the battery are guaranteed in the motion process of the wheel. The electric connection of the whole system is completely finished inside, the positive and negative electrodes of the battery are directly led to the BMS management system 6, the controller 7 and the BMS management system 6 realize the communication function through signal wires, sends signals to the battery during working, can realize the power supply requirement on the motor during use, and meets the charging requirement on the battery during idling; the outer end cap 12 performs the sealing function of the entire system.

In light of the foregoing description of preferred embodiments in accordance with the utility model, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the scope of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a three electricity collection moulding pieces of high stability electric power assisted bicycle which characterized in that: the vehicle-mounted battery pack comprises an outer rotor, a magnetic steel sheet, a stator, a battery module, a wheel shaft, a BMS management system and a controller, wherein the wheel shaft penetrates through a middle shaft of the battery module and is fixedly connected with the battery module, and the BMS management system and the controller are fixed on one side of the wheel shaft and are positioned in the battery module; the outer rotor is of a hollow cylindrical structure, a cavity is formed inside the outer rotor, the stator, the battery module and the wheel shaft are assembled in the cavity, the outer rotor extends outwards from two ends of the wheel shaft and is connected with the outer rotor in a rotating mode through a bearing, a plurality of magnetic steel sheets are distributed on the inner side wall of the cavity along the circumferential direction, and a space is reserved between each magnetic steel sheet and the stator.

2. The high stability electric power assisted bicycle tri-electric integrated module of claim 1, characterized in that: the battery module comprises a battery support and an annular battery cell main module, the battery support is provided with an annular cavity matched with the annular battery cell main module, the battery cell main module is arranged in the annular cavity, an inner ring of the annular cavity is provided with a shaft sleeve integrally connected with the battery support, and the wheel shaft is fixedly connected in the shaft sleeve.

3. The high stability electric power assisted bicycle tri-electric integrated module of claim 2, characterized in that: the outer wall of the shaft sleeve is provided with a limiting boss along the axial direction, inner ring holes of the BMS management system and the controller are provided with notches matched with the limiting boss in shape, the BMS management system and the controller are sleeved on the outer wall of the shaft sleeve, and positioning and assembling are achieved through matching of the limiting boss and the notches.

4. The high stability electric power assisted bicycle tri-electric integrated module of claim 2, characterized in that: and a reinforcing rib is arranged between the outer wall of the shaft sleeve and the inner annular wall of the annular cavity.

5. The high stability electric power assisted bicycle tri-electric integrated module of claim 2, characterized in that: the stator comprises a stator support and a stator coil, the inner side of the stator support is connected with the battery support in an integrated injection molding mode, and the stator coil is wound on the stator support.

6. The high stability electric power assisted bicycle tri-electric integrated module of claim 5, characterized in that: a plurality of grooves are distributed on the outer side wall of the battery support along the circumferential direction, the number of the grooves is matched with that of the stator supports, and the end portions of the stator supports are embedded into the grooves during injection molding.

7. An electric vehicle wheel, characterized in that: comprising a tri-electric integrated module according to any of claims 1-6, further comprising an outer hub, which is the inner hub of the electric wheel and is arranged coaxially inside the outer hub, and a number of spokes, which are connected between the outer hub and the inner hub.