CN215119126U

CN215119126U - Battery pack and electric bicycle

Info

Publication number: CN215119126U
Application number: CN202121321552.4U
Authority: CN
Inventors: 杨力平; 章波; 胡丙乾
Original assignee: Anhui Tongling Technology New Energy Co ltd
Current assignee: Anhui Tongling Technology New Energy Co ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2021-12-10
Anticipated expiration: 2031-06-11

Abstract

The utility model relates to a battery pack and an electric bicycle, which comprises a module shell and a battery module arranged in the module shell, wherein the module shell is provided with a plurality of guide grooves, and buffer parts are arranged in the guide grooves; the battery module comprises a battery shell and a plurality of batteries arranged in the battery shell, wherein the battery shell is provided with an interference buckle bulge, and the interference buckle bulge is clamped on the inner wall of the module shell; the module shell comprises a tubular part with two open ends and an end cover arranged at the opening of the tubular part, a waterproof sealing elastic part is arranged between the tubular part and the end cover, and the end cover is sealed by the waterproof sealing elastic part. Compared with the prior art, the utility model provides a group battery and electric bicycle can prevent that the group battery from rocking in the body of installation group battery, has promoted the safety in utilization of group battery.

Description

Battery pack and electric bicycle

Technical Field

The utility model belongs to the technical field of the power, especially, relate to a group battery and electric bicycle.

Background

Along with the continuous development of science and technology, electric bicycle has walked into thousands of families gradually, and electric bicycle's use can not leave the battery, and electric bicycle's battery has decided electric bicycle's life, consequently in electric bicycle's production process, in order to improve the life-span of battery, need carry out multiple protection to the battery.

In the prior art, the battery pack is prone to shake in a tube body for mounting the battery pack, which affects the safe use of the electric parts.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the group battery easily rocks in the body of installation group battery, provides a group battery and electric bicycle.

In order to solve the technical problem, an embodiment of the present invention provides a battery pack, which includes a module housing and a battery module disposed inside the module housing, wherein the module housing is provided with a plurality of guide grooves, and buffer members are disposed in the guide grooves;

the battery module comprises a battery shell and a plurality of batteries arranged in the battery shell, wherein the battery shell is provided with an interference buckle bulge, and the interference buckle bulge is clamped on the inner wall of the module shell;

the module shell comprises a tubular part with two open ends and an end cover arranged at the opening of the tubular part, a waterproof sealing elastic part is arranged between the tubular part and the end cover, and the end cover is sealed by the waterproof sealing elastic part.

Preferably, a clamping hole is formed in the battery shell, and the interference clamping protrusion is arranged in the clamping hole.

Preferably, one end of the interference buckle protrusion is connected with the side wall of the buckle hole, the interference buckle protrusion is provided with a protruding part, and the protruding part is clamped on the module shell.

Preferably, the guide slot is elongated and the buffer member is also elongated.

Preferably, the buffer member is a plastic member with elasticity.

Preferably, a plurality of battery modules are arranged in the module housing, a hollow cavity is arranged at the center line of each battery module, an aluminum pipe passes through the hollow cavity of each battery module, and two ends of the aluminum pipe are locked by a fastening device so as to connect the battery modules in series.

Preferably, the fastening means comprises a self-tapping screw

Preferably, a second silica gel waterproof pad is arranged between the sealing waterproof elastic piece and the end cover.

Preferably, a first silica gel waterproof elastic part is arranged between the sealing waterproof elastic part and the tubular part.

In order to solve the above technical problem, an embodiment of the present invention provides an electric bicycle, including the above-mentioned battery pack.

The embodiment of the utility model provides a group battery and electric bicycle compares with prior art, is equipped with the guide slot on the module casing, is equipped with the bolster in the guide slot, can utilize the bolster to carry out the atress buffering to the group battery of installing in the body, prevents that the group battery from rocking in the body of installation battery, has improved the safety in utilization of group battery. Through setting up the protruding cohesion that has promoted between module casing and the battery case of interference buckle, can play the effect that prevents that battery case from rocking inside the module casing. Through setting up sealed waterproof elastic component, can prevent the influence of the assembly tolerance of battery module tip to battery module, also can play the effect that prevents battery module and rock.

Drawings

Fig. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present invention;

FIG. 2 is a schematic view of the cross-sectional structure A-A of FIG. 1;

FIG. 3 is an enlarged view of the structure at B in FIG. 2;

fig. 4 is a schematic structural diagram of a buffer according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a battery module according to the present invention;

FIG. 6 is an enlarged schematic view of the structure at E in FIG. 5;

fig. 7 is a schematic structural view of a battery module with an aluminum pipe according to the present invention;

FIG. 8 is an enlarged view of the structure at F in FIG. 7;

FIG. 9 is a schematic bottom view of the structure of FIG. 7;

fig. 10 is a schematic structural view of a battery module with an aluminum pipe according to the present invention;

fig. 11 is an exploded structure schematic view of a battery pack;

fig. 12 is a schematic structural view of a sealing waterproof elastic member according to an embodiment of the present invention;

FIG. 13 is an enlarged view of the structure at G in FIG. 12;

fig. 14 is a schematic structural view of a first silicone waterproof pad and a second silicone waterproof pad according to an embodiment of the present invention;

fig. 15 is a schematic structural view of a battery pack with a tube according to an embodiment of the present invention;

FIG. 16 is a schematic view of the cross-sectional C-C structure of FIG. 15;

FIG. 17 is an enlarged view of the structure of FIG. 16 at D;

fig. 18 is a rear view of the structure of fig. 16.

Fig. 19 is a schematic structural view of a tube with a position-limiting exit window according to an embodiment of the present invention;

fig. 20 is a schematic structural view of a battery pack with a groove according to an embodiment of the present invention;

fig. 21 is a schematic structural view of a tube with a position-limiting lead-out member according to an embodiment of the present invention;

FIG. 22 is a schematic view of the right side structure of FIG. 21;

fig. 23 is a schematic structural view of a limiting lead-out member according to an embodiment of the present invention.

The reference numerals in the specification are as follows:

1. the device comprises a pipe body, 11, a reinforcing rib, 12, a first hinge sheet, 13, an inserting sheet, 2, a plug, 21, a second hinge sheet, 22, a plug piece, 23, a plug hole, 3, a module shell, 32, a tubular piece, 33, an end cover, 34, a sealing waterproof elastic piece, 341, an elastic positioning pin, 342, a groove, 35 a first silica gel waterproof pad, 36, a second silica gel waterproof pad, 37, a pad groove, 4, a battery, 5, a buffer piece, 51, a first bulge, 52, a base, 53, an installation part, 6, a guide groove, 61, a second bulge, 7, an outer pipe, 8, a limiting leading-out piece, 81, a sealing piece, 811, a sealing piece, 82, a limiting piece, 821, a buckling piece, 9, a battery shell, 91, a buckling bulge, 10, an interference fastening device, 14, a protective cover, 15, an aluminum pipe, 16, an installation cover and 17 limiting leading-out window.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects 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 for purposes of illustration only and are not intended to limit the invention.

As shown in fig. 1-4, an embodiment of the present invention provides a battery pack, which includes a module housing 3 and a battery module 4 installed inside the module housing 3. The module housing 3 is long. The module case 3 is provided with guide grooves 6 on the surface thereof, and the guide grooves 6 are distributed along the length direction of the module case 3. A buffer member 5 is arranged in the guide groove 6, and the buffer member 5 is embedded in the guide groove 6. The buffer 5 is elongated and the guide groove 6 is elongated, the buffer 5 being disposed in the guide groove 6.

The group battery is installed inside electric bicycle's body 1 usually, and for making things convenient for the electric bicycle installation, the tube hole diameter of body 1 is greater than the width of installing module casing 3 in the tube hole usually, and this can cause the group battery to rock in the body, influences the safety in utilization of group battery. Through set up guide slot 6 on module casing 3 to set up bolster 5 in guide slot 6, can utilize bolster 5 to carry out the atress buffering to the group battery of installing in body 1, reach and prevent that the group battery from rocking, improve the purpose of the safety in utilization of group battery.

Optionally, the buffer 5 is a plastic member with elasticity. Through setting up bolster 5 into having elastic plastic part, the elasticity of usable plastic part cushions the external force that receives to the safety in utilization of group battery has been improved.

The surface of the buffer 5 is provided with a first protrusion 51, the first protrusion 51 faces the outside of the module case 3, and the first protrusion 51 extends along the length direction of the module case 3. By providing the first protrusion 51 on the cushion member 5, the contact area between the cushion member 5 and the tube 1 for mounting the battery pack can be increased, and the module case 3 and the battery module 4 can be prevented from wobbling in the tube 1.

The cross section of the buffer member 5 comprises a base 52, a first protrusion 51 and a mounting portion 53, in the cross section of the buffer member 5, the two ends of the base 52 are provided with the mounting portions 53 protruding out of the base, the first protrusion 51 is arranged at the middle position of the base 52, and the mounting portion 53 and the base 52 are both connected with the guide groove 6. The contact area between the buffer member 5 and the guide groove 6 can be increased by providing the mounting portion 53, and the mounting area between the buffer member 5 and the pipe body 1 can also be increased, so that the buffer member 5 is not easy to fall off, and the use safety of the battery module 4 is improved.

The two opposite side walls of the guide groove 6 are provided with second protrusions 61, the second protrusions 61 extend along the length direction of the module housing 3, and the second protrusions 61 are connected with the buffer 5. The two second protrusions 61 play a role in fastening the buffer member 5, so that the buffer member 5 is not easy to fall off, and the second protrusions 61 increase the contact area between the guide groove 6 and the buffer member 5, thereby improving the use safety of the battery module 4.

In one embodiment, the battery module 4 mounted in the module case 3 includes a battery case 9 and a number of batteries mounted in the battery case 9.

In one embodiment, five battery modules 4 are provided in the module case 3. Each battery module 4 includes six batteries. Three batteries of the six batteries are connected in parallel, and two groups of three batteries connected in parallel are connected in series. The battery shell 9 is also provided with buffer cotton, filled silica gel and the like for protecting the battery in the battery module 4. The two ends of the battery are respectively provided with a battery connecting sheet which connects the electrode terminals of the batteries in a welding way so as to connect three batteries in the batteries in parallel, and the two groups of three batteries which are connected in parallel are connected in series.

In one embodiment, as shown in fig. 5-6, an interference snap projection 91 is provided on the outer surface of the battery case 9. The protruding 91 joint of interference buckle has played the effect that prevents that battery case 9 from rocking in module casing 3.

Optionally, a snap hole is provided on the battery case 9, and the interference snap projection 91 is provided in the snap hole on the battery case 9. Protruding 91's of interference buckle one end is connected with the lateral wall in buckle hole, is equipped with the protrusion on the protruding 9 of interference buckle, and protrusion joint can play the effect with battery case 9 and module case 3 zonulae occludens on module case 3. Optionally, the projection comprises a rectangular top surface at the top of the interference snap projection and one side surface that is beveled. The interference snap projections 91 have elasticity by which the battery case 9 can be fastened in the module case 3.

Optionally, the battery case 9 is provided with a plurality of interference snap protrusions 91, and the interference snap protrusions 91 are uniformly distributed on the surface of the battery case 9. Through making protruding 91 of interference buckle evenly distributed on battery housing 9's surface, can make battery housing 9 all be connected with module casing 3 everywhere, this can play and prevent that battery housing 9 from rocking the inside effect of rocking of module casing 3.

Optionally, the battery case 9 is rectangular, and each surface of the battery case 9 is provided with an interference snap projection 91. By providing the interference snap projections 91 on each side of the battery case 9, it is possible to have a plurality of connection positions between the battery module 9 and the module case 3, thereby fastening the battery module 9 in the module case 3.

Optionally, the material of the battery case 9 is plastic. The plastic has certain elasticity, and can improve the binding force between the battery shell 9 and the module shell 3.

Optionally, be equipped with a plurality of battery modules 4 in the module casing 3, all be equipped with interference buckle arch 91 on the battery casing 9 in every battery module 4. Through all setting up the protruding 91 of interference buckle on making every battery module 4, can make and all be connected through the protruding 91 of interference buckle between every battery module 4 and the module casing 9 to guaranteed all to have cohesion between every battery module 4 and the module casing 9, prevent that battery module 4 from rocking in module casing 9.

As shown in fig. 7 to 10, a hollow cavity is provided at the center line of each battery module 4, an aluminum pipe 15 passes through the hollow cavity in each battery module, and both ends of the aluminum pipe 15 are locked by a fastening device 10 to connect the battery modules 4 in series. For example, the fastening device 10 may be a self-tapping screw. An internal thread is self-tapped on the inner surface of the end of the aluminum pipe by the tapping screw. And the external thread of the tapping screw is in threaded connection with the internal thread on the end face of the aluminum pipe. Alternatively, an internal thread may be formed at the end of the aluminum pipe 15, and then a screw having an external thread may be screwed into the aluminum pipe 15.

Optionally, the end of the aluminium tube 15 is provided with a protective cover 14 for protecting the fastening device 10. The protective cover 14 can protect the fastening device 10 from external damage.

Alternatively, the end of the aluminum pipe 15 is provided with the fastening device 10, the end of the battery module 4 is provided with the mounting cap 16, and the fastening device 10 locks the mounting cap 16 to the aluminum pipe 15. By locking the mounting cover 16 to the aluminum pipe 15, the aluminum pipe 15 can be fixed to the battery module 4, and the mounting cover 16 and the battery module 4 are integrated, thereby preventing the battery module 4 from shaking and improving the safety of the battery module 4.

The mounting cover 16 is provided with a connecting member protruding outward, and the connecting member is provided with a cylindrical hole therein, and the cylindrical hole is connected with the elastic positioning pin 341 of the waterproof sealing elastic member 34.

Alternatively, five battery modules 4 are provided in the module case 3, and the battery modules 4 are connected in series by aluminum pipes 15 in a body shape. The five battery modules 4 are connected in series by the aluminum pipes 15, and the battery modules 4 can be prevented from shaking in the module case 3.

Alternatively, the through-holes in the battery modules 4 for passing the aluminum pipes 15 are located on the center line of the battery modules 4. By providing the through-hole on the center line of the battery module 4, it is possible to make the stress everywhere of the battery module 4 uniform, which improves the safety of use of the battery module 4.

The fixing mode of the aluminum pipe 15 and the fastening device 10 is adopted to replace the traditional fixing mode of fastening by adopting a screw, so that the weight of the battery module 4 is reduced, and the production cost of the battery module 4 is reduced.

In one embodiment, as shown in fig. 10-13, the module housing 3 includes a tubular member 32 with openings at both ends, and end caps 33 at both ends of the tubular member 32 for sealing the openings of the tubular member 32. The tubular member 32 has the battery module 4 provided therein. The end cap 33 is used to seal the tubular member 32. A waterproof sealing elastic piece 34 is arranged between the end cover 33 and the tubular piece 32, the waterproof sealing elastic piece 34 is in a sheet shape, the waterproof sealing elastic piece 34 is larger than the opening of the tubular piece 32, the waterproof sealing elastic piece 34 can cover the opening of the tubular piece 32, and the end cover 33 realizes sealing of the tubular piece 32 through the waterproof sealing elastic piece 34.

By providing the waterproof seal elastic member 34 between the tubular member 32 and the end cap 33, the tubular member 32 can be sealed by the waterproof seal elastic member 34, and external moisture can be prevented from entering the inside of the tubular member 32. The waterproof seal elastic member 34 can perform a good waterproof and sealing function. The assembly tolerance of the battery module 4 in the module housing 3 can also be eliminated by providing the waterproof seal elastic member 34, so that the battery module 4 is not easily shaken in the module housing 3.

Optionally, a first silicone waterproof gasket 35 is further disposed between the waterproof seal elastic member 34 and the tubular member 32. Through set up the waterproof pad 35 of first silica gel between sealed waterproof elastic component 34 and tubulose piece 32, can utilize the waterproof pad 35 of first silica gel to realize sealed waterproof, further prevent that external moisture from carrying out in the tubulose piece 32 to played and prevented that external moisture from getting into battery module 4, influence battery module 4's life.

Optionally, a second silicone gasket 36 is also provided between the waterproof seal elastomer 34 and the end cap 33. Through set up the waterproof pad 36 of second silica gel between sealed waterproof elastic component 34 and end cover 33, also can play the inside effect of preventing external moisture entering tubulose 32 to can protect the inside battery module 4 of tubulose 32, prevent the battery module 4 in the external moisture damage tubulose 32.

Optionally, the tubular member 32 is provided with a waterproof sealing elastic member 34, a first silica gel waterproof pad 35 and a second silica gel waterproof pad 36 at both ends.

Through all setting up sealed waterproof elastic component 34, first waterproof pad of silica gel 35 and the waterproof pad of second silica gel 36 at the both ends of tubulose 32, can seal up tubulose 32, prevent that external moisture from getting into inside the tubulose 32, damaging the inside battery module 4 of tubulose 32.

Alternatively, both surfaces of the waterproof seal elastic member 34 are provided with pad grooves 37, the first silicone waterproof pad 35 is disposed in the pad groove 37 of one face of the waterproof seal elastic member 34, and the second silicone waterproof pad 36 is disposed in the pad groove 37 of the other face of the waterproof seal elastic member 34. The gasket groove 37 is located at the edge of the waterproof seal elastic member 34, and is disposed around the waterproof seal elastic member 34. The edge of the waterproof elastic sealing member 34 is provided with the first silica gel waterproof pad 35 and the second silica gel waterproof pad 36, and the first silica gel waterproof pad and the second silica gel waterproof pad are arranged around the waterproof sealing member 34.

Optionally, the two faces of the waterproof sealing elastic member 34 are both provided with pad grooves 37, the pad grooves 37 are both disposed at the edge of the waterproof sealing elastic member 34, and the first and second silicone

waterproof pads

35 and 36 are both disposed at the edge of the waterproof sealing elastic member 34.

Through set up the pad groove 37 on the surface at waterproof sealing elastic component 34, can make waterproof first silica gel pad 35 and the waterproof second silica gel pad 36 and waterproof sealing elastic component 34 closely combine, prevent that moisture from getting into in battery module 4 through the gap between waterproof sealing elastic component 35 and the waterproof sealing elastic component 34 or the gap between waterproof sealing elastic component 36 and the waterproof sealing elastic component 34 of second.

Optionally, the first silicone waterproof pad 35 is connected to the second silicone waterproof pad 36 through a cylinder. The waterproof sealing elastic member 34 is provided with a through hole for the cylinder to pass through, and the cylinder is arranged in the through hole in a penetrating way.

Optionally, the waterproof sealing elastic member 34 is provided with an elastic positioning pin 341, the elastic positioning pin 341 is cylindrical, an end surface of the elastic positioning pin 341 is in a circular truncated cone shape, and a diameter of an end portion of the elastic positioning pin 341 is smaller than a diameter of a middle portion of the elastic positioning pin 341. The elastic positioning pin 341 is provided with a slot 342, the slot 342 is rectangular, the bottom surface of the slot 342 is coplanar with the bottom surface of the elastic positioning pin 341, the side surface of the slot 342 is located on the side surface of the elastic positioning pin 341, the top surface of the slot 342 is located on the top surface of the elastic positioning pin 341, and the slot 342 penetrates through the elastic positioning pin 341. The battery module 4 is provided with a jack for inserting the elastic positioning pin 341, the diameter of the jack is smaller than that of the elastic positioning pin 341, and the groove 342 enables the elastic positioning pin 341 to have certain elasticity and to be inserted into the cylindrical hole.

Optionally, the waterproof sealing elastic member 34, the first waterproof silica gel pad 35, and the second waterproof silica gel pad 36 are fixed to the tubular member 32 by screws, and the waterproof sealing elastic member 34, the first waterproof silica gel pad 35, and the second waterproof silica gel pad 36 are fixed to the tubular member 32 by screws, so that the battery module 4 in the tubular member 32 can be protected by the waterproof sealing elastic member 34, and the battery module 4 is prevented from being damaged by external moisture.

As shown in fig. 14-17, the present invention provides an electric bicycle, which comprises a tube body 1. The battery pack according to the above embodiment is mounted in the tube body 1.

Through setting up the group battery in body 1, can utilize body 1 protection group battery, prevent that the group battery from damaging in the use.

Optionally, a reinforcing rib 11 corresponding to the buffer 5 is provided in the pipe body 1, and the reinforcing rib 11 is connected with the buffer 5. The ribs 11 protrude from the inner surface of the pipe body 1. The reinforcing rib 5 has a rectangular cross section, the width of the reinforcing rib 11 in the direction perpendicular to the longitudinal direction of the pipe body 1 is equal to the distance between the two mounting portions 51 of the cushion material 5, and the reinforcing rib 11 is mounted between the two mounting portions 51. Can prevent that the group battery from rocking in body 1 inside with body 1 and module casing 3 in close contact with through setting up strengthening rib 11.

Optionally, one end of the tube body 1 is provided with a plug 2 for preventing the battery pack from falling off from the tube body 1.

As shown in fig. 5 to 8, one end of the tube body 1 is provided with a first hinge 12 for connecting the plug 2. The plug 2 includes a second hinge leaf 21 that contacts the first hinge leaf 12. The first hinge plate 12 and the second hinge plate 21 are connected. The plug 2 further comprises a plug 22, the plug 22 is connected with the module housing 3, and the outer edge of the plug 22 is connected with the second hinge sheet 21. The first hinge plate 12 is hinged with the second hinge plate 21.

Optionally, the battery pack is provided with an insertion piece 13, the plug 2 is provided with an insertion hole 23, and the insertion piece 13 is inserted into the insertion hole 23. By inserting the insertion piece 13 into the insertion hole 23, the battery pack can be fixed in the tube body 1, and the battery pack is prevented from falling off from the tube body 1.

Optionally, as shown in fig. 15, an outer tube 7 for protecting the tube body 1 is further provided on the tube body 1. The outer tube 7 is provided on the outer surface of the tube body 1, and extends in the length direction of the tube body, and can play a role in protecting the tube body 1. The cross section of the outer tube 7 is arc-shaped, and two end faces of the arc-shaped are connected to the surface of the tube body 1.

In one embodiment, as shown in fig. 18-22, the side wall of the tube body 1 is provided with a limit exit window 17. The limiting leading-out window 17 is internally provided with a limiting leading-out piece 8. The limit drawer 8 includes a sealing member 81 and a stopper 82. The sealing member 81 is connected to the stopper 82, and the upper end of the sealing member 81 is formed in a sheet shape to cover the stopper lead-out window 17. The lower end of the sealing member 81 is connected to a stopper 82. The end of the module housing 3 is provided with a groove 31 corresponding to the stopper 82. The stopper 82 is fitted in the groove 31 when the module case 3 is fitted in the body 1.

Through setting up spacing leading-out piece 8, when module casing 3 got into body 1 from the one end of body 1, can stop moving under the effect of spacing leading-out piece 8. Spacing extraction 8 can play the effect of blockking to module housing 3, carries on spacingly to module housing 3, prevents that module housing 3 from rocking in body 1.

Optionally, the limiting member 82 is a plastic member with elasticity. Through setting up locating part 82 for having elastic plastic part, can eliminate the machining error of module casing 3 to the influence of installation, prevent that module casing 3 from rocking in body 1.

Optionally, the position-limiting member 82 includes a hollow cavity, and the sidewall of the middle portion of the cavity is an outwardly extending fastening member 821, and the fastening member 821 can be fastened in the groove 31. Through setting up buckling piece 821, can tightly buckle buckling piece 821 in recess 31, make locating part 82 and module casing 3 in close contact with, prevent that locating part 82 from coming off from module casing 3 to the limiting action has played well to module casing 3.

Alternatively, the sealing member 81 has an upper end located at the upper portion of the tube body 1 for covering the limit lead-out window 17, and a lower end passing through the limit lead-out window 17 and located inside the tube body 1. An opening is provided in the upper end of the sealing member 81. The opening is provided with a sealing sheet 811, and the sealing sheet 811 is used to cover the charging port of the battery module. The sealing sheet 811 is opened, and the battery module 4 can be charged by the charging port of the battery module 4.

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

1. A battery pack is characterized by comprising a module shell and a battery module arranged in the module shell, wherein the module shell is provided with a plurality of guide grooves, and buffer parts are arranged in the guide grooves;

2. The battery pack of claim 1, wherein the battery housing is provided with a snap hole, and the interference snap projection is disposed in the snap hole.

3. The battery pack according to claim 2, wherein one end of the interference snap projection is connected to a sidewall of the snap hole, and a protrusion is provided on the interference snap projection and is snap-fitted to the module case.

4. The battery pack of claim 1 wherein said guide slot is elongated and said bumper member is elongated.

5. The battery pack according to claim 1, wherein the buffer member is a plastic member having elasticity.

6. The battery pack according to claim 1, wherein a plurality of battery modules are provided in the module case, a hollow cavity is provided at a center line of each of the battery modules, and an aluminum pipe passes through the hollow cavity of each of the battery modules and is fastened at both ends thereof by fastening means to connect the battery modules in series.

7. The battery of claim 6, wherein said fastening means comprises a self-tapping screw.

8. The battery according to claim 1, wherein a second silicone waterproof gasket is disposed between the waterproof sealing elastomer and the end cap.

9. The battery according to claim 1, wherein a first silicone waterproof gasket is provided between the waterproof sealing elastic member and the tubular member.

10. An electric bicycle characterized by comprising the battery pack according to any one of claims 1 to 9.