CN218274976U - Battery assembly for electric power-assisted bicycle and electric power-assisted bicycle - Google Patents

Abstract

The utility model provides a battery assembly and electric power assisted bicycle for electric power assisted bicycle. The battery assembly includes: a battery assembly having a housing and a battery enclosed in the housing; a control system disposed at a first end of the housing; a housing for housing the battery assembly and the control system; a first end plate connected to a first end of the battery assembly, the first end plate having a first connector thereon; a second end plate connected to the second end of the battery assembly, the second end plate having a second connector thereon, the first end plate, the second end plate, and the housing together defining an enclosed space enclosing the battery assembly and the control system; and a cable disposed in the enclosed space and for electrically communicating the battery assembly, the control system, the first connector, and the second connector. According to the utility model discloses a battery assembly for electric power-assisted bicycle, the installation is simple, and easily operation can show improvement scene installation effectiveness to can show the security and the reliability that improve electric power-assisted bicycle.

Description

Battery assembly for electric power-assisted bicycle and electric power-assisted bicycle

Technical Field

The utility model relates to an electric power-assisted bicycle especially relates to a battery assembly and including electric power-assisted bicycle of this kind of battery assembly for electric power-assisted bicycle.

Background

An electric power-assisted bicycle is a vehicle capable of realizing integration of manual riding and motor power assistance, and is provided with a power auxiliary system and a control system, wherein the power auxiliary system comprises a torque sensor, a motor, a battery assembly and the like. The battery pack provides auxiliary driving force by supplying power to the motor, so that riding becomes easier. The control system and battery assembly of existing electrically assisted bicycles are typically provided separately as two separate units. In assembling the electric power-assisted bicycle, the control system and the battery assembly are respectively fixedly mounted in a frame tube of the frame (e.g., a down tube of the frame) and are connected to each other by a cable. Moreover, the control system also needs to be electrically connected with peripheral electronic components such as a motor, a torque sensor, a rear illuminating lamp, a rear brake lamp and the like at the rear side of the battery and an instrument, a front illuminating lamp, a front brake lamp and the like at the front side of the battery through cables, which leads to complicated cable connection and complex whole assembly process of the electric power-assisted bicycle, and the cables arranged in the lower tube for connecting the control system and the battery pack are also easily damaged, resulting in failure and safety risk. In addition, once a control system or a battery assembly fails, all peripheral cables are required to be removed, so that the maintenance of the failure is difficult.

Accordingly, there is a need for improvements to existing batteries and control systems for electric assist bicycles.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an exactly, want to provide a battery assembly and electric power assisted bicycle for electric power assisted bicycle, according to the utility model discloses an at least defect among the above-mentioned prior art can be overcome to a battery assembly and electric power assisted bicycle for electric power assisted bicycle.

According to the utility model discloses an aspect provides a battery assembly for electric bicycle, include:

a battery assembly including an elongated housing and a battery enclosed in the housing;

a control system disposed at a first end of a housing of the battery assembly;

a housing for housing the battery assembly and the control system;

a first end plate connected to a first end of the battery assembly, the first end plate having a first connector thereon that is capable of plugging with a first mating connector on a frame tube of the electrically assisted bicycle;

a second end plate connected to a second end of the battery assembly, the second end plate having a second connector thereon that is mateable with a second mating connector on the frame tube, the first end plate, the second end plate and the housing together defining an enclosed space that encloses the battery assembly and the control system; and

a cable disposed in the enclosed space and for electrically communicating the battery assembly, the control system, the first connector, and the second connector.

Preferably, the control system includes a first printed circuit board for controlling and managing the battery and a second printed circuit board for controlling the motor drive.

Preferably, the control system further comprises a third printed circuit board for implementing the internet of things function.

Preferably, the battery assembly for an electric power assisted bicycle further comprises a buzzer disposed within the housing and in electrical communication with the control system.

Preferably, the plugging direction of the first connector and the plugging direction of the second connector are substantially perpendicular to each other.

Preferably, the plugging direction of the first connector is outward in the longitudinal direction of the battery assembly, and the plugging direction of the second connector is downward in the direction perpendicular to the longitudinal direction of the battery assembly.

Preferably, the first end plate is further provided with a positioning boss portion that is received in a receiving recess portion provided on the frame tube when the battery assembly is mounted to the frame tube.

Preferably, the first end plate includes a first body including a first flat portion having a rectangular shape and a first inclined portion formed integrally with the first flat portion but inclined outwardly away from the case with respect to the first flat portion, the first connector and the positioning boss portion are provided on the first flat portion, and the battery assembly includes a first extending portion extending from the main body portion of the case and abutting against the first inclined portion.

Preferably, the second end plate is further provided with a locking protrusion, and when the battery assembly is mounted on the frame tube, a top side of the locking protrusion is abutted by a lock tongue of a locking mechanism provided on the frame tube.

Preferably, the second end plate includes a second body including a second straight portion having a rectangular shape and a second inclined portion formed integrally with the second straight portion but inclined outward away from the housing with respect to the second straight portion, the second connector and the locking projection are provided on the second inclined portion, and the battery assembly includes a second extension portion extending from the main body portion of the housing and abutting against the second inclined portion.

Preferably, a charging interface electrically communicated with the battery assembly through a cable positioned in the closed space is further arranged on the second end plate.

According to the utility model discloses a further aspect provides an electric power assisted bicycle, including the frame, its characterized in that, electric power assisted bicycle is still including installing as above battery assembly on the frame pipe of frame.

Preferably, a mounting groove for mounting the battery assembly is defined on the frame tube, a first mating connector matched with the first connector is arranged at a first end of the mounting groove, and a second mating connector matched with the second connector is arranged at a second end of the mounting groove; and the plugging direction of the first mating connector and the plugging direction of the second mating connector are substantially perpendicular to each other.

Preferably, the frame tube defines a receiving groove for receiving the battery assembly, and a receiving recess for receiving the positioning boss is defined at a first end of the receiving groove.

Preferably, a mounting groove for mounting the battery assembly is defined on the frame tube, a locking mechanism including a spring-loaded latch and a compression spring disposed on a bottom wall of the frame tube are disposed at a second end of the mounting groove, the latch abuts against a top side of the locking protrusion, and the compression spring pushes up a bottom side of the locking protrusion.

According to the utility model discloses a battery assembly for electric power bicycle, battery pack and control system are integrated in battery assembly's dustcoat, realize that all cables that the electricity is connected are all encapsulated in airtight space, battery assembly and the cable that accesss to peripheral electronic components only realize through first connector and the second electric connector that exposes from battery assembly, this not only makes the process that battery assembly installed on the car frame pipe become simple, easily operation, show and improve on-the-spot installation effectiveness, and the cable that does not expose can not receive the damage almost, can show the security and the reliability that improve electric power bicycle.

Drawings

Fig. 1 schematically shows in perspective view a battery assembly for an electric power assisted bicycle according to the present invention;

FIG. 2 schematically illustrates, in perspective view, a battery pack of the battery assembly of FIG. 1, wherein a control system is provided at an end of a housing of the battery pack;

FIG. 3 schematically illustrates the battery assembly of FIG. 1 in a perspective view, but with the housing removed;

fig. 4 schematically shows the first end plate of fig. 3 in a perspective view;

FIG. 5 schematically illustrates the first end plate of FIG. 3 in another perspective view;

fig. 6 schematically shows the second end plate of fig. 3 in a perspective view;

FIG. 7 schematically illustrates the second end plate of FIG. 3 in another perspective view;

FIG. 8 schematically illustrates, in perspective view, an outer cover of the battery assembly of FIG. 1;

FIG. 9 is an enlarged view of a first end of the battery assembly of FIG. 1;

FIG. 10 is an enlarged view of a second end of the battery assembly of FIG. 1;

fig. 11 schematically shows in perspective view a lower tube of an electric power assisted bicycle according to the present invention;

FIG. 12 is an enlarged view of a first end of the down tube shown in FIG. 11;

FIG. 13 is an enlarged view of a second end of the down tube of FIG. 11; and

fig. 14 is a perspective view schematically showing a state in which the battery assembly shown in fig. 1 is mounted in the lower tube shown in fig. 11.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to examples. It will be understood by those skilled in the art that these examples are illustrative and are not meant to constitute any limitation of the invention.

Fig. 1 schematically shows a battery assembly for an electric power assisted bicycle according to the present invention in a perspective view, and fig. 2 schematically shows a battery pack of the battery assembly shown in fig. 1 in a perspective view, wherein a control system is provided at a case end of the battery pack. As shown in fig. 1 and 2, a battery assembly 1 for an electric power-assisted bicycle according to the present invention is generally elongated so as to be suitable for being installed in a frame tube (e.g., a down tube) of a frame of the electric power-assisted bicycle. The battery assembly 1 comprises a battery component 3, the battery component 3 comprising a housing 5, also of generally elongate shape, and a battery enclosed in the housing 5. The housing 5 may be injection molded, for example, from plastic. Although lead-acid batteries or nickel-cadmium batteries can be used, more and more electric power-assisted bicycles employ lithium batteries with the development of lithium battery technology. Since the present invention does not relate to the improvement of the battery itself, a detailed description of the battery will be omitted.

A control system for an electric power assisted bicycle typically includes at least a battery control and management module for controlling and managing a battery and a motor drive control module for controlling a motor drive. With the high-speed development of internet technology, some control systems of electric bicycles further include an internet of things control module for realizing the internet of things function, so that the electric bicycles are connected, identified, managed or controlled through APPs on mobile terminal devices such as smart phones, for example. The battery control and management module, the motor drive control module or the internet of things control module can be presented in the form of a printed circuit board. For this reason, according to the utility model discloses a battery assembly 1 for electric power assisted bicycle still includes the control system 7 that sets up in the one end (for example, first end) of battery pack 3, and this control system includes first printed circuit board 9, the third printed circuit board 13 that is used for controlling and managing the battery, is used for controlling motor drive's second printed circuit board 11 and is used for realizing the thing networking function. The dimensions of the first printed circuit board 9, the second printed circuit board 11 and the third printed circuit board 13 are substantially equivalent to the dimensions of the end of the case 5 of the battery assembly 3. The first printed circuit board 9, the second printed circuit board 11, and the third printed circuit board 13 are disposed substantially parallel to and spaced apart from each other and are fixed to the end of the case 5 of the battery assembly 3 with screws (e.g., screws having external threads and hollow internal threads). In this way, the control system 7 and the battery assembly 3 are compactly assembled together. In order to facilitate the electrical connection of the first printed circuit board 9 for controlling and managing the batteries with the battery assembly 3, the first printed circuit board 9 is disposed immediately adjacent to the end of the case 5 of the battery assembly 3 and the third printed circuit board 13 is disposed at the outermost side in the preferred embodiment shown in fig. 2, but it should be understood that the disposition of the first printed circuit board 9, the second printed circuit board 11 and the third printed circuit board 13 should not be limited to this order, and those skilled in the art may dispose these three printed circuit boards in other suitable orders as needed. Further, it is also understood that only the first and second printed circuit boards 9 and 11 may be provided, and the third printed circuit board 13 for implementing the internet of things function may not be provided. Furthermore, a buzzer 15 may also be provided on one of the printed circuit boards, and in the preferred embodiment shown in fig. 2, the buzzer 15 is provided on the outermost third printed circuit board 13. Of course, the buzzer 15 may also be provided directly on the housing 5 but in electrical communication with the control system. When the electric bicycle is abnormally pried or the battery power is insufficient, the buzzer 15 can give out different alarm sounds or prompt sounds required by legal laws and regulations so as to remind a user of the electric bicycle.

Fig. 3 schematically shows the battery assembly of fig. 1 in a perspective view, but with the cover removed, fig. 4 schematically shows the first end plate of fig. 3 in a perspective view, fig. 5 schematically shows the first end plate of fig. 3 in another perspective view, fig. 6 schematically shows the second end plate of fig. 3 in a perspective view, fig. 7 schematically shows the second end plate of fig. 3 in another perspective view, and fig. 8 schematically shows the cover of the battery assembly of fig. 1 in a perspective view. As shown in fig. 3, the battery assembly 1 for an electric power-assisted bicycle according to the present invention further includes a first end plate 17 connected to a first end of the battery assembly 3, and a second end plate 19 connected to a second end of the battery assembly 3.

As shown in fig. 4 and 5, the first end plate 17 comprises a first body 21, on an outer side 21a of the first body 21 facing away from the battery assembly 3a first connector 23 is provided, which first connector 23 can be electrically connected to the control system 7 by means of a cable arranged in a channel formed in the first body 21 and passing through a first opening 25 located on an inner side 21b of the first body 21 facing the battery assembly 3. Of course, the first connector 23 may be provided directly through the first body 21, such that cables do not need to pass through passages in the first body 21 to directly connect the first connector 23 with the control system 7. A positioning projection 27 is also provided on the outer side 21a of the first body 21 facing away from the battery assembly 3, and when the battery assembly 1 is mounted into the down tube of the vehicle frame, the positioning projection 27 can be received in a receiving recess provided on the down tube, so that the first end of the battery assembly 1 is accurately positioned with respect to the down tube. In the preferred embodiment, two side-by-side locating bosses 27 are shown, but it should be understood that there may be only one locating boss 27 or there may be more locating bosses 27. In a preferred embodiment, each locating boss 27 has a progressively increasing dimension in the vertical direction shown in fig. 4 from the free end towards the first body 21 so as to mate with a V-shaped receiving recess on the down tube (described in detail below) so that the first end of the battery assembly 1 can be securely and fixedly held in place relative to the down tube. The first body 21 may further have a first positioning hole 31 through which the positioning post 29 extending from the first end of the case 5 of the battery assembly 3 passes, and a first screw hole 33 through which a screw passes so as to be screwed to the case 5 of the battery assembly 3.

Although the first body 21 may be integrally formed in a flat plate shape, in a preferred embodiment the first body 21 includes a first flat portion 21c having a substantially rectangular shape and a first inclined portion 21d integrally formed with the first flat portion 21c but inclined outwardly away from the case 5 of the battery assembly 3 with respect to the first flat portion 21 c. The first connector 23, the positioning boss 27, and the first positioning hole 31 are all provided on the first flat portion 21c, and the first opening 25 and the first screw hole 33 are provided on the first inclined portion 21d. Of course, the structural features on the first body 21 may be provided in other ways, for example, the first opening 25 may be provided on the first flat portion 21 c. In the case where the first body 21 includes the first flat portion 21c and the first inclined portion 21d, the battery assembly 3 includes the first extending portion 5a extending from the main body portion of the case 5. When mounted, the first inclined portion 21d of the first body 21 abuts against the first extending portion 5a, so that a screw passing through the first screw hole 33 on the first inclined portion 21d is screwed into the first corresponding screw hole 35 on the first extending portion 5a, thereby firmly fixing the first end plate 17 and the battery assembly 3 together. In order to make the first extension portion 5a abut closely against the first inclined portion 21d, a first protrusion 37 may be formed on the first inclined portion 21d toward one side of the battery assembly 3, the first protrusion 37 defining a mating surface 37a complementary to an end of the first extension portion 5a. For example, when the end of the first extension 5a is formed as a vertical surface, the mating surface 37a of the first projection 37 is also formed as a vertical surface; when the end of the first extension 5a is formed as an inclined surface, the mating surface 37a of the first protrusion 37 is also formed as an inclined surface inclined in the same direction.

As shown in fig. 6 and 7, the second end plate 19 comprises a second body 39, on an outer side 39a of the second body 39 facing away from the battery assembly 3a second connector 41 is provided, the second connector 41 being electrically connectable to the control system 7 by means of a cable arranged in a channel formed in the second body 39 and passing through a second opening 43 located on an inner side 39b of the second body 39 facing the battery assembly 3. The second connector 41 may also be provided directly through the second body 39, such that cables do not need to pass through a passage in the second body 39 to directly connect the second connector 41 with the control system 7. In a preferred embodiment, the first connector 23 on the first body 21 of the first end plate 17 is a square port connector, but the second connector 41 on the second body 39 of the second end plate 19 is a round port connector, which is different from the square port connector. It should be understood that the first connector 23 may be a round connector and the second connector 41 a square connector, or both the first connector 23 and the second connector 41 may be square connectors or both round connectors. It is particularly preferable that the plugging direction (i.e., the opening direction) of the first connector 23 is outward in the longitudinal direction of the battery components 3, and the plugging direction (i.e., the opening direction) of the second connector 41 is downward in the direction perpendicular to the longitudinal direction of the battery components 3, i.e., the plugging direction of the first connector 23 and the plugging direction of the second connector 41 are substantially perpendicular to each other, and this arrangement of the first connector 23 and the second connector 41 is particularly useful for mounting the battery assembly 1 to the lower tube or dismounting the battery assembly 1 from the lower tube. Of course, it is also possible that the plugging direction (i.e., the opening direction) of the first connector 23 is downward in the direction perpendicular to the longitudinal direction of the battery assembly 3, and the plugging direction (i.e., the opening direction) of the second connector 41 is outward in the longitudinal direction of the battery assembly 3. A locking projection 45 is also provided on the outer side 39a of the second body 39 facing away from the battery assembly 3, and when the battery assembly 1 is mounted in the down tube of the vehicle frame, the locking projection 45 can be stopped by a spring-loaded latch of a latch mechanism (described in detail below) provided on the down tube to prevent the battery assembly from being accidentally detached from the down tube or removed by another person. The second body 39 may also be formed with a second positioning hole 47 through which a positioning post (not shown) extending from the second end of the case 5 of the battery assembly 3 passes, and a second screw hole 49 through which a screw passes so as to be screwed to the case 5 of the battery assembly 3. The second body 39 may also be provided with a charging interface 51 for charging the battery assembly 3. In a preferred embodiment, the charging interface 51 is arranged on top of the second body 39 and can be electrically connected to the battery assembly 3 and/or the control system 7 by a cable arranged in another channel formed in the second body 39 and passing through the second opening 43. Of course, the charging interface 51 may also be electrically connected directly to the battery assembly 3 and/or the control system 7 by a cable that does not pass through another channel in the second body 39. Further, the charging inlet 51 may be provided on the side surface of the second body 39.

Although the second body 39 may be integrally formed in a flat plate shape, in the preferred embodiment the second body 39 includes a second straight portion 39c having a substantially rectangular shape and a second inclined portion 39d integrally formed with the second straight portion 39c but inclined outwardly away from the case 5 of the battery assembly 3 with respect to the second straight portion 39 c. A second positioning hole 47 is formed on the second flat portion 39c, and the second connector 41, the locking boss 45, the second opening 43, and the second screw hole 49 are all provided on the second inclined portion 39d. Of course, the structural features on the second body 39 may be provided in other ways, for example, the second opening 43 may be provided on the second straight portion 39 c. In the case where the second body 39 includes the second straight portion 39c and the second inclined portion 39d, the battery assembly 3 includes the second extending portion 5b extending from the main body portion of the case 5. When mounted, the second inclined portion 39d of the second body 39 abuts against the second extending portion 5b, so that a screw passing through the second screw hole 49 on the second inclined portion 39d is screwed into the second corresponding screw hole on the second extending portion 5b, thereby firmly fixing the second end plate 19 and the battery assembly 3 together. In order to bring the second extension portion 5b into close abutment with the second inclined portion 39d, a second protrusion 53 may be formed on the second inclined portion 39d toward the battery assembly 3 side, the second protrusion 53 defining a mating surface 53a complementary to the end of the second extension portion 5b. For example, when the end of the second extension 5b is formed as a vertical surface, the mating surface 53a of the second projection 53 is also formed as a vertical surface; when the end of the second extension 5b is formed as an inclined surface, the mating surface 53a of the second projection 53 is also formed as an inclined surface inclined in the same direction.

The battery assembly 1 for an electric power assisted bicycle according to the present invention further includes a cover 55 as shown in fig. 8, and the cover 55 may be formed by, for example, drawing aluminum or other suitable metal material or may be formed by molding plastic into an elongated cylindrical shape matching the shape of the battery pack 3, and the elongated cylindrical cover 55 is open at both ends.

An assembling process of the battery assembly 1 for an electric power-assisted bicycle according to the present invention will be described below.

First, the first printed circuit board 9, the second printed circuit board 11, and the third printed circuit board 13 are electrically connected to each other and to the battery assembly 3 by a cable (not shown). Next, the first printed circuit board 9, the second printed circuit board 11, and the third printed circuit board 13 are fixed to the first end of the case 5 of the battery assembly 3 with screws, as shown in fig. 2. Subsequently, battery assembly 3, shown in fig. 2, with first printed circuit board 9, second printed circuit board 11 and third printed circuit board 13 mounted thereon, is inserted into enclosure 55, shown in fig. 8, and first connector 23 on first end plate 17 is electrically connected with the printed circuit board (e.g., second printed circuit board 11 and/or third printed circuit board 13) of control system 7 by a cable passing through a passage on first body 21 of first end plate 17, second connector 41 on second end plate 19 is electrically connected with the printed circuit board (e.g., second printed circuit board 11 and/or third printed circuit board 13) of control system 7 by a cable passing through a passage on second body 39 of second end plate 19 and extending between battery assembly 3 and enclosure 55, and charging port 51 on second end plate 19 is electrically connected with battery assembly 3 by a cable passing through another passage on second body 39 of second end plate 19. Finally, positioning posts 29 extending from the first end of case 5 of battery assembly 3 are passed through first positioning holes 31 on first end plate 17 and first protrusions 37 on first end plate 17 are abutted against first extending portions 5a extending from the first end of case 5 of battery assembly 3, and then screws are screwed in to fasten first end plate 17 and battery assembly 3 together. Similarly, a positioning post extending from the second end of the case 5 of the battery assembly 3 is passed through the second positioning hole 47 on the second end plate 17 and the second protrusion 53 on the second end plate 17 is abutted against the second extension 5b extending from the second end of the case 5 of the battery assembly 3, and then a screw is screwed in to fasten the second end plate 17 and the battery assembly 3 together, thereby forming the battery assembly 1 shown in fig. 1. The first end plate 17, the second end plate 19 and the housing 55 cooperate closely to define a generally enclosed space in which the battery assembly 3 with the control system 7 housed is enclosed, as shown in fig. 9 and 10, wherein fig. 9 is an enlarged view of the first end of the battery assembly shown in fig. 1 and fig. 10 is an enlarged view of the second end of the battery assembly shown in fig. 1. This closed space configuration can prevent dust or moisture from entering and damaging the battery assembly 3 or the control system 7, and on the other hand, the whole battery assembly 1 is electrically connected with the outside only through the first connector 23, the second connector 41 and the charging interface 51, and no cable is exposed outside the battery assembly 1.

It should be understood that the assembly process of the battery assembly 1 for the electric power assisted bicycle according to the present invention is only exemplary, and the assembly sequence of the battery assembly 1 can be changed as required by those skilled in the art, for example, the printed circuit boards can be electrically connected after being fixed to the first end of the housing 5 of the battery assembly 3, or the first connector 23, the second connector 41 and the charging interface 51 can be electrically connected to the control system 7 and/or the battery after being fixed to the battery assembly 3.

Fig. 11 schematically shows a lower tube of an electric power assisted bicycle according to the present invention in a perspective view, fig. 12 is an enlarged view of a first end of the lower tube shown in fig. 11, and fig. 13 is an enlarged view of a second end of the lower tube shown in fig. 11. As shown in fig. 11, the lower tube 57 is formed in a generally tubular shape as a part of a frame (not shown as a whole) of the electric assist bicycle and is at least partially opened at a top end to define a receiving groove 59 for receiving the battery assembly 1. As shown in fig. 12, a first mating connector 61 fixed to the wall of the down tube 57 and mating with the first connector 23 on the first end plate 17 is provided at the first end 59a of the placement groove 59, and a cable (not shown) connected to the first mating connector 61 can be run down the down tube and be led out at a suitable position. Two positioning plates 63 are also provided at the first end 59a of the receiving slot 59, the two positioning plates 63 being secured to the wall of the lower tube 57 to define a generally V-shaped receiving recess 65 for receiving or receiving the positioning boss 27 on the first end plate 17. As shown in fig. 13, a second mating connector 67 fixed to the wall of the down tube 57 and mating with the second connector 41 on the second end plate 19 is provided at the second end 59b of the seating groove 59, and a cable (not shown) connected to the second mating connector 67 may run up the down tube and be led out at a suitable position. In a preferred embodiment, the plugging direction (i.e., the opening direction) of the first mating connector 61 is outward along the longitudinal direction of the lower tube 57, and the plugging direction (i.e., the opening direction) of the second mating connector 67 is upward along a direction perpendicular to the longitudinal direction of the lower tube 57, i.e., the plugging direction of the first mating connector 61 and the plugging direction of the second mating connector 67 are also substantially perpendicular to each other. A locking mechanism 69 is also provided at the second end 59b of the receiving slot 59, the locking mechanism 69 including a lock body 71 and a spring-loaded latch tongue 73 extending from the lock body 71, the latch tongue 73 having a downwardly inclined ramp 73a. In a normal case, the latch tongue 73 is extended from the lock body 71 by a spring located in the lock body 71, but the latch tongue 73 can be retracted into the lock body 71 by pressing the inclined surface 73a thereof. In addition, the locking bolt 73 may be retracted into the lock body 71 by turning a key (not shown) inserted into the lock body 71 from a hole 75 in the side wall of the lower tube. A compression spring 77 located on the bottom wall of the lower tube may also be provided at the second end 59b of the seating groove 59.

The process of assembling the battery assembly 1 for an electric power-assisted bicycle according to the present invention to the lower tube 57 will be described below.

The first end of the battery assembly 1 is placed into the first end 59a of the receiving slot 59 of the lower tube 57 such that the first connector 23 on the first end plate 17 is plugged into the first mating connector 61 on the first end 59a of the receiving slot 59 and such that the locating projection 27 on the first end plate 17 is received in the receiving recess 65 on the first end 59a of the receiving slot 59. At the same time, the second end of the battery assembly 1 is pressed downward so that the locking projection 45 on the second end plate 19 pushes the inclined surface 73a of the latch tongue 73 and so that the second connector 41 on the second end plate 19 starts to be plugged with the second mating connector 67 on the second end 59b of the seating groove 59. Once the locking boss 45 moves past the latch tongue 73, the latch tongue 73 returns to the original position. At this time, the second connector 41 and the second mating connector 67 are already in the plugged state, and the latch tongue 73 abuts against the locking boss 45 at the top side thereof, blocking the locking boss 45 from moving outward to lock the battery assembly 1 on the lower tube 57, as shown in fig. 14. When battery assembly 1 is mounted in place on lower tube 57, battery assembly 1 forms a tight fit with lower tube 57, appearing as one piece, with the entire battery assembly 1 except for the outer cover, with only charging interface 51 exposed. Of course, the charging interface 51 may also be covered by an openable cover.

Because the compression spring 77 is arranged on the bottom wall of the lower pipe, when the battery assembly is installed in place, the compression spring 77 pushes the bottom side of the locking lug 45 upwards, on one hand, the locking lug 45 can be tightly abutted against the bolt 73, noise generated by shaking of the battery assembly 1 in the lower pipe 57 is prevented, and on the other hand, when the bolt 73 is retracted by rotating the key, the battery assembly 1 can be ejected out of the lower pipe 57, so that the battery assembly 1 can be taken out.

The fitting of the positioning boss 27 on the first end plate 17 with the receiving recess 65 and the setting of the plugging direction of the first connector 23 and the plugging direction of the second connector 41 to be substantially perpendicular to each other make it very easy to assemble the battery assembly 1 onto the lower tube 57 and to remove it from the lower tube 57 according to the present invention. Further, since the first body 21 of the first end plate 17 is provided to include the first flat portion 21c and the first inclined portion 21d inclined outward with respect to the first flat portion 21c, and the second body 39 of the second end portion 19 is provided to include the second flat portion 39c and the second inclined portion 39d inclined outward with respect to the second flat portion 39c, it is possible to make the seating groove 59 of the lower tube 57 have a larger open area at both end portions. The larger open area not only makes it easier to provide the first mating connector 61, the two positioning plates 63, the second mating connector 67 and the locking mechanism 69 in the lower duct, but also makes it easier to install or remove the battery assembly 1 into or from the lower duct.

While the invention has been described in detail in connection with the preferred embodiments thereof, it is to be understood that such detail is solely for that purpose and that no limitation of the invention is thereby intended. For example, although in the preferred embodiment the battery assembly is mounted to the lower tube of the frame, it will be appreciated that the battery assembly according to the present invention may also be mounted to other frame tubes such as the top tube or seat tube of the frame. The scope of the invention is defined by the claims.

Claims (15)

1. A battery assembly for an electric power assisted bicycle, the battery assembly comprising:

a battery assembly (3), the battery assembly (3) comprising an elongated housing (5) and a battery enclosed in the housing (5);

a control system (7) disposed at a first end of the housing (5);

a housing (55) for housing the battery assembly (3) and the control system (7);

a first end plate (17) connected to a first end of the battery assembly (3), the first end plate (17) having a first connector (23) thereon that is capable of plugging with a first mating connector (61) on a frame tube of the electric power-assisted bicycle;

a second end plate (19) connected to a second end of the battery assembly (3), the second end plate (19) having a second connector (41) thereon that is capable of mating with a second mating connector (67) on the frame tube, the first end plate (17), the second end plate (19) and the housing (55) together defining an enclosed space that encloses the battery assembly (3) and the control system (7); and

a cable disposed in the enclosed space and for electrically communicating the battery assembly (3), the control system (7), the first connector (23), and the second connector (41).

2. Battery assembly for an electric assisted bicycle according to claim 1, characterized in that the control system (7) comprises a first printed circuit board (9) for controlling and managing the battery and a second printed circuit board (11) for controlling the motor drive.

3. The battery assembly for an electric power assisted bicycle according to claim 2, wherein the control system (7) further comprises a third printed circuit board (13) for implementing internet of things functions.

4. The battery assembly for an electric power assisted bicycle according to claim 1, further comprising a buzzer (15) disposed within the housing (55) and in electrical communication with the control system (7).

5. The battery assembly for an electric power assisted bicycle according to claim 1, wherein the plugging direction of the first connector (23) and the plugging direction of the second connector (41) are substantially perpendicular to each other.

6. The battery assembly for an electric power assisted bicycle according to claim 5, wherein the plugging direction of the first connector (23) is outward in the longitudinal direction of the battery pack (3), and the plugging direction of the second connector (41) is downward in the direction perpendicular to the longitudinal direction of the battery pack (3).

7. The battery assembly for an electric assist bicycle according to claim 1, wherein a positioning boss (27) is further provided on the first end plate (17), the positioning boss (27) being received in a receiving recess (65) provided on the frame tube when the battery assembly (1) is mounted on the frame tube.

8. The battery assembly for an electric assist bicycle according to claim 7, wherein the first end plate (17) includes a first body (21), the first body (21) includes a first flat portion (21 c) having a rectangular shape and a first inclined portion (21 d) formed integrally with the first flat portion (21 c) but inclined outwardly away from the housing (5) with respect to the first flat portion (21 c), the first connector (23) and the positioning boss (27) are provided on the first flat portion (21 c), and the battery assembly (3) includes a first extending portion (5 a) extending from a main body portion of the housing (5) and abutting against the first inclined portion (21 d).

9. The battery assembly for an electric assist bicycle according to claim 1, wherein the second end plate (19) is further provided with a locking boss (45), and when the battery assembly (1) is mounted on the frame tube, a top side of the locking boss (45) is abutted by a locking tongue (73) of a locking mechanism (69) provided on the frame tube.

10. The battery assembly for an electric power-assisted bicycle according to claim 9, wherein the second end plate (19) includes a second body (39), the second body (39) includes a second straight portion (39 c) having a rectangular shape and a second inclined portion (39 d) formed integrally with the second straight portion (39 c) but inclined outwardly away from the housing (5) with respect to the second straight portion (39 c), the second connector (41) and the locking projection (45) are provided on the second inclined portion (39 d), and the battery component (3) includes a second extension portion (5 b) extending from a main body portion of the housing (5) and abutting against the second inclined portion (39 d).

11. The battery assembly for an electric power assisted bicycle according to claim 1, wherein the second end plate (19) is further provided with a charging interface (51) electrically communicated with the battery assembly (3) through a cable located in the closed space.

12. An electrically assisted bicycle comprising a frame, wherein the electrically assisted bicycle further comprises a battery assembly according to any of claims 1 to 11 mounted on a frame tube of the frame.

13. The electrically assisted bicycle according to claim 12, wherein the frame tube defines a receiving groove (59) for receiving the battery assembly (1), a first mating connector (61) for mating with the first connector (23) is provided at a first end (59 a) of the receiving groove (59), and a second mating connector (67) for mating with the second connector (41) is provided at a second end (59 b) of the receiving groove (59); and is

When the battery assembly (1) is the battery assembly as defined in claim 5, the plugging direction of the first mating connector (61) and the plugging direction of the second mating connector (67) are substantially perpendicular to each other.

14. The electrically assisted bicycle according to claim 12, wherein the frame tube defines a seating groove (59) for seating the battery assembly (1), and when the battery assembly (1) is the battery assembly according to claim 7, a receiving recess (65) for receiving the positioning boss (27) is defined at a first end (59 a) of the seating groove (59).

15. The electrically assisted bicycle according to claim 12, wherein the frame tube defines a receiving groove (59) for receiving the battery assembly (1), and when the battery assembly (1) is the battery assembly according to claim 9, a locking mechanism (69) including a spring-loaded latch tongue (73) and a compression spring (77) provided on a bottom wall of the frame tube are provided at the second end (59 b) of the receiving groove (59), the latch tongue (73) abuts against a top side of the locking protrusion (45), and the compression spring (77) urges a bottom side of the locking protrusion (45) upward.

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