CN210403958U - Battery pack of electric bicycle - Google Patents

Abstract

The utility model provides an electric bicycle battery package, include: the shell is provided with a mounting port; the circuit board is arranged in the shell; the charging assembly is arranged in the shell and at least partially exposed out of the shell so as to be connected with an external battery car or an external power supply; and the lighting assembly is electrically connected with the circuit board, the lighting assembly is arranged at the mounting opening, and light rays emitted by the lighting assembly are emitted from the mounting opening. The utility model provides an electric bicycle battery package not only can be used for charging or supplying power for the storage battery car, still can be used to emergency lighting simultaneously, its is multiple functional, convenient to use.

Description

Battery pack of electric bicycle

Technical Field

The utility model belongs to the technical field of the storage battery car charges, more specifically says, relates to an electric bicycle battery package.

Background

The battery car is also called as an electric car, and is a pure electric motor car which is powered by a storage battery (battery) and driven by a motor (direct current, alternating current, series excitation and independent excitation).

Because the storage battery is bulky, it is inconvenient to install and dismantle, and when the journey is great, the electric quantity of storage battery is restricted easily, therefore electric bicycle battery package arises by oneself, and electric bicycle battery package convenient to carry, and electric bicycle battery package can be for the storage battery electric power storage to can guarantee the normal driving of storage battery car. However, the battery pack of the electric bicycle on the existing market only has a charging function, and the function is single.

In addition, when the storage battery car goes on night, the storage battery has not been electrified, and the storage battery car can't throw light on, need be equipped with the light in addition and throw light on, troublesome poeration.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electric bicycle battery package to solve the electric bicycle battery package function singleness's that exists among the prior art technical problem.

In order to achieve the above object, the utility model adopts the following technical scheme: provided is an electric bicycle battery pack including:

the shell is provided with a mounting port;

the circuit board is arranged in the shell;

the charging assembly is arranged in the shell, and at least part of the charging assembly is exposed out of the shell so as to be connected with an external storage battery car or an external power supply;

and the lighting assembly is electrically connected with the circuit board, the lighting assembly is arranged at the mounting opening, and light rays emitted by the lighting assembly are emitted from the mounting opening.

Further, the lighting assembly includes:

the lamp bead is attached to the circuit board and is electrically connected with the circuit board;

the lamp cup is covered on the lamp bead, one end of the lamp cup is connected with the lamp bead, the other end of the lamp cup is buckled at the mounting opening, and the size of the opening of the lamp cup is gradually increased from one end to the other end;

and the lens is arranged at the mounting opening and is covered on the other end of the lamp cup.

Furthermore, a first baffle extending along the circumferential direction of the mounting opening is convexly arranged on the inner wall of the mounting opening, and at least part of the first baffle extends towards the inside of the shell to form a clamping plate;

the periphery of the other end of the lamp cup extends outwards to form a second baffle, the second baffle stops at the outer side of the first baffle, at least part of the second baffle extends towards the inside of the shell to form a clamping hook, and the clamping hook can be clamped with the clamping plate.

Furthermore, a third baffle extending along the circumferential direction of the mounting opening is convexly arranged on the inner wall of the mounting opening, the third baffle is arranged on the outer side of the second baffle and is in stepped arrangement with the second baffle, and the periphery of the lens is abutted against the outer side of the third baffle.

Furthermore, a key is arranged on the circuit board, the key is electrically connected with the circuit board and used for controlling the working mode of the lighting assembly, a first through hole is formed in the shell, and the key penetrates through the first through hole and at least partially exposes out of the shell.

Further, the charging assembly includes:

the battery pack comprises a plurality of batteries which are connected in series, and the batteries are electrically connected with the circuit board after being connected in series;

the input and output socket is electrically connected with the circuit board and can be exposed out of the shell to be connected with an external power supply or an external battery car;

and the expansion interface is electrically connected with the circuit board and can be exposed out of the shell to charge the mobile equipment.

Furthermore, the charging assembly also comprises two battery racks, the two battery racks are oppositely arranged in the shell at intervals, a plurality of mounting holes which are uniformly distributed at intervals are formed in the battery racks, and two ends of the battery respectively penetrate through the corresponding mounting holes in the two battery racks;

and an insulating plate used for isolating the battery and the shell from each other is attached to one side of the battery frame, which is far away from the battery.

Further, the subassembly that charges still include with the circuit board electricity is connected and is used for the pilot lamp of electric quantity display, be equipped with the light trap on the casing corresponding the position of pilot lamp.

Furthermore, the shell comprises a bottom shell and an upper cover, and the upper cover is arranged on the bottom shell in a surrounding manner to form an installation cavity;

the battery pack, the battery frame, the insulating plate, the circuit board, the expansion interface and the lighting assembly are all arranged in the installation cavity, the battery pack, the battery frame and the insulating plate are assembled into an L-shaped structure, and the circuit board, the expansion interface and the lighting assembly are all arranged in a gap of the L-shaped structure.

The utility model provides an electric bicycle battery package's beneficial effect lies in: compared with the prior art, the utility model discloses an electric bicycle battery package is through the setting of charging assembly and lighting assembly, and installs lighting assembly in the installing port department of casing, and the light that lighting assembly sent jets out from the installing port for this electric bicycle battery package not only can be used for charging or supplying power for outside storage battery car, can also provide the illumination function when the outage of outside storage battery car, makes this electric bicycle battery package function more multiple functional, and it is more convenient to use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic perspective view of an electric bicycle battery pack provided in an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the electric bicycle battery pack of FIG. 1;

FIG. 3 is a partial enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic diagram of the internal structure of the battery pack of the electric bicycle shown in FIG. 1;

fig. 5 is a schematic structural view of the upper cover in fig. 1.

Wherein, in the figures, the respective reference numerals:

1-a shell; 2-a circuit board; 3-a charging assembly; 4-an illumination assembly; 5-a socket cover; 10-mounting a cavity; 11-a bottom shell; 12-upper cover; 31-a battery pack; 32-input and output sockets; 33-an expansion interface; 34-a battery holder; 35-an insulating plate; 41-lamp beads; 42-a lamp cup; 43-a lens; 44-key press; 111-a second via; 112-a fixture block; 121-a mounting port; 122-a first via; 123-a third via; 124-light hole; 125-a first baffle; 126-a card board; 127-a third baffle; 128-an extension plate; 129-mounting posts; 311-a battery; 341-mounting holes; 421-a second baffle; 422-hook.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to 3, a battery pack for an electric bicycle according to the present invention will now be described. The battery pack of the electric bicycle is used for storing electricity for the original battery of the battery car so as to ensure the normal operation of the battery car.

The electric bicycle battery pack comprises a shell 1, a circuit board 2, a charging assembly 3 and a lighting assembly 4. The shell 1 is provided with a mounting port 121, the circuit board 2 is arranged in the shell 1, the charging assembly 3 is electrically connected with the circuit board 2, the charging assembly 3 is arranged in the shell 1, at least part of the charging assembly is exposed out of the shell 1 to be connected with an external battery car or an external power supply, the lighting assembly 4 is electrically connected with the circuit board 2, the lighting assembly 4 is arranged at the mounting port 121, and light rays emitted by the lighting assembly 4 are emitted from the mounting port 121.

Here, it should be noted that the charging assembly 3 is connected to an external power supply, which means that the battery pack of the electric bicycle of the present application is charged by the external power supply, so as to ensure that the electric quantity of the battery pack of the electric bicycle is sufficient for charging the external battery car; and the subassembly 3 that charges is connected with outside storage battery car, specifically indicates that the subassembly 3 that charges is connected with outside storage battery car for outside storage battery car or power supply charge, and then guarantees that outside storage battery car can normal operating.

In addition, it should be noted that at least part of the charging assembly 3 is exposed out of the housing 1, which means that at least the part of the charging assembly 3 used for being connected with an external power supply and an external battery car is exposed out of the housing 1, thereby facilitating the connection, and certainly, in other embodiments of the present invention, more parts of the charging assembly 3, even all of the parts, are exposed out of the housing 1, and the present invention is not limited herein.

The utility model provides an electric bicycle battery package is through the setting of charging assembly 3 and lighting assembly 4, and installs lighting assembly 4 in casing 1's installing port 121 department, and the light that lighting assembly 4 sent jets out from installing port 121, and like this for this electric bicycle battery package not only can be used for charging for outside storage battery car, can also provide the illumination function when external storage battery car cuts off the power supply, makes this electric bicycle battery package function more complete, and it is more convenient to use.

Specifically, in the embodiment, referring to fig. 3, the lighting assembly 4 includes a lamp bead 41, a lamp cup 42 and a lens 43. The lamp bead 41 is attached to the circuit board 2 and electrically connected to the circuit board 2, the lamp bead 41 is used for emitting lighting, the lamp cup 42 is covered on the lamp bead 41, one end of the lamp cup 42 is connected to the lamp bead 41, concretely, one end of the lamp cup 42 is supported on the outer edge of the lamp bead 41, the other end of the lamp cup 42 is buckled on the mounting port 121, the lamp cup 42 is used for concentrating and gathering the light emitted by the lamp bead 41, the lens 43 is mounted on the mounting port 121 and covered on the other end of the lamp cup 42, and the lens 43 is used for transmitting the light emitted by the lamp bead 41.

In this embodiment, the cross section of the lamp cup 42 is in a direction, and the size of the opening of the lamp cup 42 gradually increases from one end to the other end, so as to achieve a better light-gathering effect.

More specifically, referring to fig. 3, a first baffle 125 is convexly disposed on an inner wall of the mounting opening 121, the first baffle 125 extends along a circumferential direction of the mounting opening 121, at least a portion of the first baffle 125 extends toward an inside of the housing 1 to form a clamping plate 126, and the clamping plate 126 is perpendicular to the first baffle 125. The periphery of the other end of the lamp cup 42 extends outward to form a second baffle 421, the second baffle 421 is stopped at the outer side of the first baffle 125, at least a portion of the second baffle 421 extends vertically to the inside of the housing 1 to form a hook 422, and the hook 422 can be fastened to the fastening plate 126. When the lamp cup 42 is installed, one end of the lamp cup 42 is abutted against the lamp bead 41, and the other end of the lamp cup 42 is pressed, so that the hook 422 is clamped with the clamping plate 126, and the second baffle 421 is abutted against the outer side of the first baffle 125, thereby completing the installation of the lamp cup 42.

Here, it should be noted that, if the first baffle 125 extends along the circumferential direction of the mounting opening 121, the mounting opening 121 is square, and the first baffle 125 is also square, the first baffle 125 at least partially extends toward the inside of the casing 1 to form the card board 126, which means that at least one side of the first baffle 125 extends toward the inside of the casing 1 to form the card board 126. Similarly, the circumference of the other end of the lamp cup 42 is square, and the second baffle 421 is also square, so that at least a portion of the second baffle 421 extends into the housing 1 to form the hook 422, that is, at least one edge of the second baffle 421 extends into the housing 1 to form the hook 422.

Preferably, in the present embodiment, referring to fig. 3 and fig. 5, the two opposite sides of the first baffle 125 extend toward the inside of the casing 1 to form two clamping plates 126, the two clamping plates 126 are disposed oppositely, the two opposite sides of the second baffle 421 extend toward the inside of the casing 1 to form two clamping hooks 422, and the two clamping hooks 422 are clamped with the two clamping plates 126 in a one-to-one correspondence manner. It should be understood that, depending on the actual installation of the lamp cup 42 and the housing 1, the positions and the number of the above-mentioned snap-gauge 126 and the snap-gauge 422 may also be other situations, such as the snap-gauge 126 extending on three sides of the first baffle 125 and the snap-gauge 422 extending on three sides of the second baffle 421, which is not limited herein.

In the present embodiment, referring to fig. 3, a third baffle 127 is further protruded from an inner wall of the mounting opening 121, the third baffle 127 extends along a circumferential direction of the mounting opening 121, the third baffle 127 is disposed outside the second baffle 421 and is disposed in a step shape with the second baffle 421, an opening of the third baffle 127 is smaller than an opening of the first baffle 125, and a periphery of the lens 43 abuts against an outer side of the third baffle 127.

Specifically, in this embodiment, the lens 43 may be first installed and fixed with the lamp cup 42, and it may be fixed by a fastener or other means, so that the lens 43 and the lamp cup 42 may be installed at one time. It should be understood that, in other embodiments of the present invention, according to practical situations and specific requirements, the lamp cup 42 and the lens 43 may also be fixed to the housing 1, for example, the lamp cup 42 is clamped at the mounting opening 121, and then the lens 43 is attached to the third baffle 127, specifically, the lens 43 may be fixed to the third baffle 127 by an attaching manner, and the lens 43 may also be fixed to the third baffle 127 by a fastening member, which is not limited herein.

In this embodiment, in order to ensure the light weight of the housing 1, the thickness of the housing 1 needs to be as thin as possible, that is, the thickness of the mounting opening 121 needs to be relatively thin, but in order to ensure the mounting strength of the lamp cup 42 and the lens 43 at the mounting opening 121, the thickness of the mounting opening 121 at the position corresponding to the first baffle 125 and the third baffle 127 is appropriately increased, specifically, the first baffle 125 and the third baffle 127 are appropriately extended to the periphery of the mounting opening 121 by a section, and the other ends of the first baffle 125 and the third baffle 127 are also stepped, so as to ensure the mounting strength of the lamp cup 42 and the lens 43.

Referring to fig. 1, a key 44 is disposed on the circuit board 2, and the key 44 is electrically connected to the circuit board 2 and used for controlling the operation mode of the lighting assembly 4. Referring to fig. 5, the housing 1 has a first through hole 122, and the key 44 is disposed in the first through hole 122 and at least partially exposed outside the housing 1. Specifically, in the present embodiment, the operation modes of the illumination assembly 4 are an illumination mode and an SOS distress mode, respectively, and the specific circuit design of the circuit board 2 and the circuit design of the key 44 are the prior art and will not be described repeatedly herein.

In the present embodiment, referring to fig. 1, fig. 2 and fig. 4, the charging assembly 3 includes a battery pack 31, an input and output socket 32 and an expansion interface 33. The battery pack 31 includes a plurality of batteries 311 connected in series, each battery 311 is electrically connected to the circuit board 2 after being connected in series, and after each battery 311 is connected in series to form the battery pack 31, the amount of charge in the battery pack 31 is the sum of the amounts of charge in each battery 311, so that the battery pack 31 can satisfy the charging demand of the battery under certain conditions. The input and output socket 32 is electrically connected to the circuit board 2 and can be exposed outside the housing 1 to be connected to an external power source or an external battery car, that is, the charging component 3 shares an input/output interface, and the expansion interface 33 is electrically connected to the circuit board 2 and can be exposed outside the housing 1 to charge the mobile device. The charging assembly 3 of the present invention can electrically connect the input and output socket 32 with an external power source through a power line when the battery pack 31 is insufficient in electric quantity, thereby realizing charging and electric power storage of the battery pack 31; when the external storage battery car is insufficient in electric quantity, the input and output socket 32 and the external storage battery car can be electrically connected through a connecting wire, so that the charging assembly 3 can charge the external storage battery car; and when the mobile device is low in power, the mobile device can be connected with the expansion interface 33 through the data line to charge the mobile device.

In the present embodiment, referring to fig. 2, the housing 1 is provided with a second through hole 111, the input and output socket 32 is attached to the circuit board 2 and partially passes through the second through hole 111 to exit the housing 1, and the input and output socket 32 is a triangular socket.

In addition, referring to fig. 2 and 4, in order to prevent the input and output socket 32 from being affected by the external environment, the input and output socket 32 is further provided with a socket cover 5, the socket cover 5 is rotatably disposed on the bottom case 11, the socket cover 5 is rotated to be opened when the input and output socket 32 is needed, and the socket cover 5 is selectively closed when the input and output socket 32 is not needed, so as to protect the input and output socket 32.

In this embodiment, the charging assembly 3 includes two expansion interfaces 33, the two expansion interfaces 33 are positive and negative sockets respectively, the housing 1 is provided with two third through holes 123, the two expansion interfaces 33 are respectively inserted on the circuit board 2, and the end portions of the two expansion interfaces are exposed out of the housing 1 through the third through holes 123 for connection of a connection line.

In addition, the charging assembly 3 further includes two battery frames 34, the two battery frames 34 are opposite and spaced inside the casing 1, a plurality of mounting holes 341 are formed in the battery frames 34 and are uniformly spaced, and two ends of the battery 311 are respectively inserted into the corresponding mounting holes 341 in the two battery frames 34. An insulating plate 35 for insulating the battery 311 and the case 1 from each other is attached to a side of the battery holder 34 away from the battery 311.

Preferably, in this embodiment, the battery holder 34 is a plate, the two insulating plates 35 are respectively attached and fixed to the two battery holders 34, and the whole of the battery holders 34 and the insulating plates 35 is attached and positioned to the inner wall of the housing 1.

Preferably, in the present embodiment, the axial direction of the battery 311 is the same as the width direction of the housing 1, and the two battery racks 34 are spaced apart along the width direction of the housing 1.

In this embodiment, the charging assembly 3 further includes an indicator light (not labeled in the figure), the indicator light is electrically connected to the circuit board 2 and is used for indicating the electric quantity, please refer to fig. 5, a light hole 124 is disposed on the housing 1 corresponding to the indicator light, so that the electric quantity of the battery pack 31 can be indicated through the indicator light, and the user can conveniently charge and discharge the battery pack 31 according to the electric quantity prompt.

Preferably, in the present embodiment, the charging assembly 3 includes five indicator lights, which can be used for displaying the amount of power of 20%, 40%, 60%, 80% and 100%, for example, when all of the five indicator lights are provided, the amount of power of 100% is represented, wherein the amount of four indicator lights is represented by 80%, and so on.

Preferably, in this embodiment, the indicator light is an in-line LED light. It can be understood that, in other embodiments of the present invention, the indicator light may also be other types of lights, such as a patch LED light, according to actual situations and specific requirements, which is not limited herein.

In the present embodiment, referring to fig. 2, the housing 1 includes a bottom shell 11 and an upper cover 12, and the upper cover 12 is disposed on the bottom shell 11 to form an installation cavity 10. Specifically, two opposite side edges of the upper cover 12 extend towards the bottom case 11 respectively to form extending plates 128, the extending plates 128 are provided with clamping grooves, two opposite side inner walls of the bottom case 11 are convexly provided with clamping blocks 112, and the two clamping blocks 112 are respectively clamped in the two clamping grooves.

The battery pack 31, the battery frame 34, the insulating plate 35, the circuit board 2, the expansion interface 33 and the lighting assembly 4 are all arranged in the installation cavity 10, the battery pack 31, the battery frame 34 and the insulating plate 35 form an L-shaped structure, and the circuit board 2, the expansion interface 33 and the lighting assembly 4 are all arranged in a gap of the L-shaped structure, so that the whole shell 1 is tidy and compact in internal layout, small in occupied space and convenient to carry, and can be placed in a front frame of a battery car.

The circuit board 2 is mounted on the upper cover 12 and is spaced apart from and parallel to the upper cover 12, and specifically, the upper cover 12 extends toward the circuit board 2 to form mounting posts 129, and the circuit board 2 is locked on the mounting posts 129 by screws. The expansion interface and lighting assembly 4 extends from the circuit board 2 to the outside of the upper cover 12, and the input and output socket 32 extends horizontally from the circuit board 2 to the outside of the bottom case 11.

Specifically, referring to fig. 2 and 4, the circuit board 2 is disposed in the mounting cavity 10 near the upper right, the expansion interface 33 and the lighting assembly 4 both extend upward from the circuit board 2 to the outside of the upper cover 12, the input and output socket 32 extends rightward from the level of the circuit board 2 to the outside of the bottom case 11, and the battery pack 31, the battery holder 34, and the insulating plate 35 are all wrapped on the left side and the lower side of the circuit board 2.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (9)

1. Electric bicycle battery package, its characterized in that includes:

the shell is provided with a mounting port;

the circuit board is arranged in the shell;

the charging assembly is arranged in the shell, and at least part of the charging assembly is exposed out of the shell so as to be connected with an external storage battery car or an external power supply;

and the lighting assembly is electrically connected with the circuit board, the lighting assembly is arranged at the mounting opening, and light rays emitted by the lighting assembly are emitted from the mounting opening.

2. The electric bicycle battery pack of claim 1, wherein the illumination assembly comprises:

the lamp bead is attached to the circuit board and is electrically connected with the circuit board;

the lamp cup is covered on the lamp bead, one end of the lamp cup is connected with the lamp bead, the other end of the lamp cup is buckled at the mounting opening, and the size of the opening of the lamp cup is gradually increased from one end to the other end;

and the lens is arranged at the mounting opening and is covered on the other end of the lamp cup.

3. The battery pack for the electric bicycle as claimed in claim 2, wherein a first baffle extending along the circumferential direction of the mounting opening is protruded from the inner wall of the mounting opening, and a clamping plate extends at least partially into the housing;

the periphery of the other end of the lamp cup extends outwards to form a second baffle, the second baffle stops at the outer side of the first baffle, at least part of the second baffle extends towards the inside of the shell to form a clamping hook, and the clamping hook can be clamped with the clamping plate.

4. The battery pack for the electric bicycle according to claim 3, wherein a third baffle extending along the circumferential direction of the mounting opening is further protruded on the inner wall of the mounting opening, the third baffle is disposed outside the second baffle and is arranged in a step shape with the second baffle, and the periphery of the lens abuts against the outside of the third baffle.

5. The battery pack for the electric bicycle according to claim 1, wherein the circuit board is provided with a key, the key is electrically connected with the circuit board and used for controlling the operation mode of the lighting assembly, the housing is provided with a first through hole, and the key is inserted into the first through hole and at least partially exposed out of the housing.

6. The electric bicycle battery pack of claim 1, wherein the charging assembly comprises:

the battery pack comprises a plurality of batteries which are connected in series, and the batteries are electrically connected with the circuit board after being connected in series;

the input and output socket is electrically connected with the circuit board and can be exposed out of the shell to be connected with an external power supply or an external battery car;

and the expansion interface is electrically connected with the circuit board and can be exposed out of the shell to charge the mobile equipment.

7. The battery pack for the electric bicycle according to claim 6, wherein the charging assembly further comprises two battery racks, the two battery racks are oppositely arranged in the housing at intervals, a plurality of mounting holes are formed in the battery racks, the mounting holes are evenly distributed at intervals, and two ends of the battery are respectively inserted into the corresponding mounting holes of the two battery racks;

and an insulating plate used for isolating the battery and the shell from each other is attached to one side of the battery frame, which is far away from the battery.

8. The battery pack of claim 6, wherein the charging assembly further comprises an indicator light electrically connected to the circuit board for displaying the amount of electricity, and the housing has a light hole corresponding to the indicator light.

9. The battery pack for the electric bicycle according to claim 7, wherein the housing comprises a bottom shell and an upper cover, and the upper cover is arranged on the bottom shell to form a mounting cavity in an enclosing manner;

the battery pack, the battery frame, the insulating plate, the circuit board, the expansion interface and the lighting assembly are all arranged in the installation cavity, the battery pack, the battery frame and the insulating plate are assembled into an L-shaped structure, and the circuit board, the expansion interface and the lighting assembly are all arranged in a gap of the L-shaped structure.

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