Power-assisted riding equipment

Abstract

The power-assisted riding equipment comprises a shell and a battery pack, and the shell comprises a shell body with a hollow cavity; the battery pack is detachably assembled in the hollow cavity, the battery pack comprises a plurality of battery units, each battery unit comprises a battery cell shell and a battery cell accommodated in the battery cell shell, ribs and a second limiting structure are arranged on the outer wall of the battery cell shell, the second limiting structure comprises at least one limiting block, and the limiting blocks are arranged on the outer wall of the battery cell shell. The limiting block comprises a base body convexly arranged on the battery cell shell and a deformation body connected with the base body, and the deformation body is provided with an inclined surface for guiding the shell body to enter and exit; when the battery pack is assembled in the hollow cavity, the deformation body abuts against the shell body, and the rib is close to the shell body. According to the invention, the force required for inserting or extracting the battery pack into or out of the shell body can be reduced, the battery pack is smoothly disassembled and assembled, and the disassembling and assembling efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a power-assisted riding device. Background Art

[0002] At present, a mid-mounted motor is provided in the cycling equipment to assist riding, and a battery structure is provided in the equipment to power the motor. The battery structure is composed of a battery pack and a shell, wherein the battery pack and the shell are usually fixed in the following manner: the battery pack and the shell are locked and fixed by using the end caps at both ends. In order to meet the heat dissipation requirements of the battery pack during use, one design is to leave a certain heat dissipation space between the battery pack shell and the shell. However, the mid-mounted bicycle will inevitably vibrate during riding. The existence of the above-mentioned gap is likely to cause shaking between the battery pack shell and the shell, affecting the connection effectiveness of the battery pack; another design is to use a metal material with good thermal conductivity to conduct away the heat generated by the battery during operation. Although this method can reduce the shaking of the battery during riding of the mid-mounted bicycle, the battery pack and the heat dissipation shell are tightly connected, and there is a problem of difficulty in disassembling and assembling the battery pack and the shell, which not only affects the disassembly and assembly efficiency but also may cause damage to the battery pack due to disassembly and assembly.

[0003] As for the existence of the above-mentioned gaps, a stamping process is currently used to directly stamp out spring tongue pieces on the battery shell, and the spring tongue pieces are distributed around the battery shell. The outer side of each spring tongue piece can elastically abut against the inner wall of the shell, and the inner side of the spring tongue piece is forced to be concave inward. During the application of the above-mentioned structure, the elastic abutment structure on all sides causes the internal battery to shake with a large amplitude and degree of freedom, which still affects the connection effectiveness of the battery pack; in addition, the inward concave action causes the battery shell to require a large avoidance space, resulting in a larger space in the battery shell, which is not conducive to the heat dissipation of the battery. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide an assisted riding device, which can ensure that the battery pack is tightly connected to the outer shell body and improve the disassembly and assembly efficiency.

[0005] The present disclosure provides an assistive riding device, comprising:

[0006] A housing including a housing body having a hollow chamber;

[0007] A battery pack is detachably assembled in the hollow chamber, the battery pack comprising a plurality of battery cells, each of the battery cells comprising a battery cell shell and a battery cell accommodated in the battery cell shell, the outer wall of the battery cell shell is provided with ribs and a second limiting structure, the second limiting structure comprises at least one limiting block, the limiting block comprises a base protruding from the battery cell shell and a deformable body connected to the base, the deformable body is provided with an inclined surface for guiding the outer shell body to enter and exit; when the battery pack is assembled in the hollow chamber, the deformable body abuts against the outer shell body, and the ribs are close to the outer shell body.

[0008] Optionally, after the deformation body abuts against the shell body, the deformation body is suspended relative to the outer wall of the battery cell shell.

[0009] Optionally, the inclined surface includes a first inclined surface and a second inclined surface provided on the deformation body, and an extension surface of the first inclined surface intersects with an extension surface of the second inclined surface on a longitudinal section of the battery cell casing.

[0010] Optionally, the deformable body is further provided with a deformable body top surface connecting the first inclined surface and the second inclined surface, and when the battery package is installed in the hollow chamber, the deformable body top surface is in surface contact with the inner wall of the outer shell body.

[0011] Optionally, the ribs are distributed along the long axis of the battery cell, and the protruding direction of the ribs is the same as the protruding direction of the adjacent limit blocks. After the battery pack is placed in the outer shell body, the limit blocks and the ribs are both in contact with the inner wall of the outer shell body.

[0012] Optionally, a rib is provided on each side of the second limiting structure.

[0013] Optionally, before the battery is packaged into the outer shell body, the top surface of the deformation body protrudes beyond the top surface of the rib of the rib, and after the battery is packaged into the outer shell body, the top surface of the deformation body is flush with the top surface of the rib, and the bottom surface of the deformation body is suspended from the outer wall of the battery cell shell.

[0014] Optionally, before the battery pack is placed in the outer shell body, the top surface of the deformation body protrudes by 0.2 mm-0.5 mm compared to the top surface of the rib.

[0015] Optionally, the inclination angles of the first inclined plane and the second inclined plane are 20° to 40°.

[0016] Optionally, a connection between the first inclined surface and the top surface of the deformable body adopts an arc structure transition, and / or a connection between the second inclined surface and the top surface of the deformable body adopts an arc structure transition.

[0017] Optionally, a portion of the deformable body is connected to the base body, and another portion is suspended in the air, and the deformable body can transmit the extrusion force to the base body under the extrusion of the shell body.

[0018] Optionally, in the longitudinal section of the battery cell shell, the deformation body and the base body form a C shape or an L shape.

[0019] Optionally, a first stop portion is provided on the outer wall of the battery cell shell, and a second stop portion is provided on the inner wall of the outer shell body. When the battery package is installed in the hollow chamber, the first stop portion is close to or abuts against the second stop portion to limit the displacement of the battery cell shell in the outer shell body; a third stop portion is provided on the outer wall of the battery cell shell, and a fourth stop portion is provided on the inner wall of the outer shell body. When the battery package is installed in the hollow chamber, an installation gap is formed between the third stop portion and the fourth stop portion to adjust the installation position of the battery pack.

[0020] Optionally, the outer wall of the battery cell shell includes a top wall, a bottom wall opposite to the top wall, and two side walls connecting the top wall and the bottom wall, and the second limiting structure is arranged on the top wall and / or the bottom wall; the battery cell shell has multiple battery cell compartments, and the battery cells are assembled in the battery cell compartments.

[0021] Optionally, the side wall is an arc surface protruding outward, and the flatness of the top wall and the bottom wall is greater than the flatness of the side wall.

[0022] Optionally, the first stop portion is arranged on the bottom wall, and the second stop portion is arranged on the inner wall of the shell body at a position corresponding to the bottom wall; the third stop portion is arranged on the top wall and corresponds to the first stop portion, and the fourth stop portion is arranged on the inner wall of the shell body at a position corresponding to the top wall.

[0023] Optionally, the edge of the battery cell compartment is provided with a chamfer for guiding the battery cell to enter.

[0024] Optionally, the chamfer is 10° to 30°.

[0025] Optionally, a plurality of first hollow portions are provided on the outer wall of the battery cell housing, and the first hollow portions are connected to the battery cell compartments.

[0026] Optionally, a second hollow portion is provided on the base at a position corresponding to the first hollow portion, and the second hollow portion is connected to the first hollow portion.

[0027] Optionally, the limit block is an injection molded part.

[0028] Optionally, the number of the battery cell compartments is ten, with three battery cell compartments each being provided near the top wall and the bottom wall, and four battery cell compartments being provided in the middle, and the four battery cell compartments in the middle are staggered with the three battery cell compartments near the top wall and the bottom wall.

[0029] Optionally, the ratio of the distance that the battery cell compartment located in the middle and outermost part protrudes outward in the arrangement direction compared to the battery cell compartments located on both sides to the diameter of the battery cell compartment is between 0.48-0.52.

[0030] Optionally, the battery cell shell includes at least one sub-shell. When the battery cell shell includes a plurality of sub-shells, the plurality of sub-shells are arranged along the long axis of the battery cell shell, and two adjacent sub-shells are arranged opposite to each other.

[0031] Optionally, the battery cell housing includes two sub-housings, each of the two sub-housings is provided with a limiting block, and when the two sub-housings are butted against each other, the limiting block on one sub-housing is opposite to the limiting block on the other sub-housing.

[0032] Optionally, the sub-shell and a limiting block provided on the sub-shell are integrally formed.

[0033] Optionally, a concave platform is provided on the mating surface of one of the two sub-shells, and a convex platform is provided on the mating surface of the other sub-shell; when the two sub-shells are butt-jointed, the concave platform is engaged with the convex platform.

[0034] Optionally, the battery pack also includes a flexible circuit board, a control circuit board and a lead-out structure; the flexible circuit board is arranged between the bottom wall of the battery cell shell and the outer shell body, the control circuit board is arranged at the end of the battery pack and is electrically connected to the flexible circuit board, and the battery cell is electrically connected to the flexible circuit board through the lead-out structure.

[0035] Optionally, multiple battery cells are connected along the long axis of the battery cell to form a battery pack, and the second limiting structures of the multiple battery cells are arranged in a row along the long axis of the battery cell; the flexible circuit board extends along the long axis of the battery cell and covers each battery cell on the battery pack, the middle part of the flexible circuit board is supported by the second limiting structure, and the two sides of the flexible circuit board are respectively abutted against the ribs on both sides of the second limiting structure.

[0036] Optionally, a mounting hole is provided on the cell shell of the battery unit, and the mounting hole is arranged along the long axis of the cell shell and passes through both ends of the cell shell;

[0037] The battery pack also includes a locking structure for connecting the multiple battery cells together, and the locking structure includes a first locking plate, a second locking plate, a screw and a nut. The screw passes through the first locking plate, multiple orderly arranged battery cells and the second locking plate in sequence and is threadedly connected to the nut.

[0038] Optionally, the lead-out structure includes a nickel strip and a connecting plate provided at the end of the battery cell, the nickel strip is electrically connected to the battery cell of the battery cell and the connecting plate respectively, and the connecting plate is electrically connected to the flexible circuit board.

[0039] Optionally, an insulating sheet is provided between two opposite nickel strips respectively connected to different battery cells.

[0040] Optionally, a portion of the flexible circuit board that is not in contact with the second limiting structure and the ribs is suspended relative to the battery cell housing.

[0041] Optionally, the flexible circuit board is suspended relative to the connecting plate to form a suspended area, and a connection point between the connecting plate and the flexible circuit board is located in the suspended area.

[0042] Optionally, the planes where the bottom surfaces of both sides of the flexible circuit board are located are tangent to the outer side walls of the battery cell shell, so that the heights of both sides of the flexible circuit board are consistent with the height of the upper surface of the substrate.

[0043] Optionally, a height of the flexible circuit board from an outer wall of the battery cell housing is less than a height of the rib protruding from the outer wall of the battery cell housing.

[0044] Optionally, a first through hole for the deformable body to pass through is provided on the flexible circuit board, and a second through hole is further provided on the flexible circuit board at a position corresponding to the second hollow portion, and the second through hole is connected to the second hollow portion.

[0045] Optionally, the shell further comprises end covers arranged on both sides of the shell body, and the end covers are provided with limiting grooves on the convex ribs close to the shell body;

[0046] A sealing ring is arranged in a one-to-one correspondence with the end cover, the outer circumferential surface of the sealing ring is provided with a first protrusion structure, the inner circumferential surface of the sealing ring is provided with a first limiting structure, the first limiting structure includes a connecting portion and a limiting portion, the connecting portion is accommodated in the limiting groove, the limiting portion abuts against the inner side wall of the convex rib, the inner circumferential surface of the sealing ring abuts against the outer side wall of the convex rib, the outer shell body squeezes the first protrusion structure so that the sealing ring is compressed in the space between the outer shell body and the end cover.

[0047] Optionally, the convex rib is a closed annular structure, the shape of the sealing ring is adapted to the shape of the convex rib, and the length of the inner circumference of the sealing ring is smaller than the length of the outer side wall of the convex rib.

[0048] Optionally, a portion of the orthographic projection area of ​​the limiting portion on the inner circumferential surface of the sealing ring is located outside the orthographic projection area of ​​the connecting portion on the inner circumferential surface of the sealing ring;

[0049] Optionally, an orthographic projection area of ​​the limiting portion on the inner circumferential surface of the sealing ring is larger than an orthographic projection area of ​​the connecting portion on the inner circumferential surface of the sealing ring.

[0050] Optionally, in the long axis direction of the sealing ring, the limiting portion and the connecting portion form a T-shape.

[0051] Optionally, a surface of the limiting portion opposite to the inner circumferential surface of the sealing ring abuts against the convex rib.

[0052] Optionally, the first protrusion structure includes at least one circle of first bosses that are continuously distributed along the outer circumferential surface of the sealing ring and form a closed-loop structure.

[0053] Optionally, a cross-section of the first boss decreases from an end close to the sealing ring to an end away from the sealing ring.

[0054] Optionally, a circle of guide grooves is provided on the end cover along the outer periphery of the convex rib; the front end of the sealing ring enters into the guide groove.

[0055] Optionally, a guide structure for guiding the sealing ring into the guide groove is provided at the front end of the sealing ring.

[0056] Optionally, the guide structure is a slope surface connecting the front end surface and the outer peripheral surface of the sealing ring.

[0057] Optionally, the slope has an inclination of 30° to 60°.

[0058] Optionally, the outer groove wall of the guide groove is an inclined surface, and the slope surface is sealed and matched with the inclined surface.

[0059] Optionally, a plurality of limiting grooves are provided on the convex rib, each limiting groove extends from a side of the convex rib away from the end cover to a side close to the end cover, and each limiting groove passes through an inner wall and an outer wall of the convex rib.

[0060] Optionally, the depth of the limiting groove is smaller than the height of the rib.

[0061] Optionally, the inner circumferential surface of the sealing ring is further provided with a second protrusion structure, and the second protrusion structure is sealingly matched with the outer side wall of the rib.

[0062] Optionally, the second protrusion structure includes at least one circle of second bosses that are continuously distributed along the inner circumference of the sealing ring and form a closed-loop structure, and the second bosses avoid the first limiting structure.

[0063] Optionally, the cross-section of the second boss decreases from an end close to the sealing ring to an end away from the sealing ring.

[0064] Optionally, the first boss disposed on the outer circumferential surface of the sealing ring and the second boss disposed on the inner circumferential surface of the sealing ring are staggered with each other.

[0065] Optionally, the first limiting structure is close to the rear end of the sealing ring.

[0066] Optionally, the sealing ring is made of silicone.

[0067] The implementation of the above scheme has the following beneficial effects:

[0068] In the present disclosure, a second limiting structure is provided on the outer wall of the battery cell shell, and the battery pack is abutted against the outer shell body through the limiting block of the second limiting structure. The limiting block is supported between the outer shell body and the battery cell shell by extrusion and deformation of the deformation body, so as to avoid displacement between the outer shell body and the battery cell shell and prevent the battery pack from shaking in the shell. The deformation body is provided with an inclined surface for guiding the outer shell body to enter and exit. During the process of inserting or withdrawing the battery pack from the outer shell body, the inclined surface of the deformation body contacts the inner wall of the outer shell body, and the contact area is small, which can reduce the force required for insertion or withdrawal, ensure smooth disassembly and assembly of the battery cell shell, and improve disassembly and assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 is a schematic diagram of the structure of the power-assisted riding device provided by an embodiment of the present disclosure;

[0070] Figure 2 It is a schematic diagram of the disassembly and assembly structure of the end portion of the power-assisted riding device provided by an embodiment of the present disclosure;

[0071] Figure 3 is a schematic cross-sectional structure diagram of an assistive riding device provided by an embodiment of the present disclosure;

[0072] Figure 4 The embodiment of the present disclosure provides Figure 3 Schematic diagram of the local structure;

[0073] Figure 5 The embodiment of the present disclosure provides Figure 3 Schematic diagram of the local structure;

[0074] Figure 6 It is a schematic diagram of the structure of the end cover and the sealing ring provided in the embodiment of the present disclosure;

[0075] Figure 7 is a schematic structural diagram of an end cover provided by an embodiment of the present disclosure;

[0076] Figure 8 is a schematic diagram of the structure of a sealing ring provided in an embodiment of the present disclosure;

[0077] Fig. 9 is a front view of a sealing ring provided in an embodiment of the present disclosure;

[0078] Fig.10 is a schematic diagram of a first protrusion structure on a sealing ring provided in an embodiment of the present disclosure;

[0079] Fig.11 is a schematic diagram of a first limiting structure on a sealing ring provided in an embodiment of the present disclosure;

[0080] Fig.12 is a schematic diagram of a second protrusion structure on a sealing ring provided in an embodiment of the present disclosure;

[0081] Fig.13 It is a schematic diagram of the structure in which the sealing ring provided in the embodiment of the present disclosure is assembled between the end cover and the housing body;

[0082] Fig.14 It is a schematic diagram of the structure in which the sealing ring provided in the embodiment of the present disclosure is assembled between the end cover and the housing body;

[0083] Fig.15 is a cross-sectional view of an assistive riding device provided by an embodiment of the present disclosure;

[0084] Fig.16 is a schematic diagram of the structure of a battery pack provided by an embodiment of the present disclosure;

[0085] Fig.17 is a partial structural schematic diagram of a battery pack provided in an embodiment of the present disclosure;

[0086] Fig.18 is a partial structural schematic diagram of a battery pack provided in an embodiment of the present disclosure;

[0087] Fig.19 is a schematic structural diagram of a battery unit provided by an embodiment of the present disclosure;

[0088] Fig. 20 is an exploded view of a battery unit provided by an embodiment of the present disclosure;

[0089] Fig.21 is a cross-sectional view of a battery cell provided by an embodiment of the present disclosure;

[0090] Fig. 22 is a schematic diagram of the structure of a screw provided in an embodiment of the present disclosure;

[0091] Fig.23is a schematic structural diagram of a first locking piece provided in an embodiment of the present disclosure;

[0092] Fig.24 is a schematic diagram of the structure of a battery pack provided by an embodiment of the present disclosure;

[0093] Fig.25 is a circuit diagram of a battery pack provided in an embodiment of the present disclosure.

[0094] In the figure:

[0095] 100 housing, 101 housing body, 102 hollow chamber, 103 inner wall, 104 end cover, 105 rib, 106 limiting groove, 107 inner wall, 108 outer wall, 109 guide groove, 110 outer groove wall, 111 limiting column, 112 second stopper, 113 third stopper, 114 fourth stopper, 115 installation gap,

[0096] 200 battery pack, 201 battery pack, 202 battery unit, 203 battery cell, 204 battery cell housing, 205 outer wall, 206 top wall, 207 bottom wall, 208 side wall, 209 sub housing, 211 concave platform, 212 convex platform, 215 battery cell compartment, 216 mounting hole, 217 first locking plate, 218 second locking plate, 219 screw, 220 nut, 221 first hollow portion, 222 second hollow portion, 224 second limiting structure, 225 limiting block, 226 base, 227 deformation body, 228 first inclined surface, 229 second inclined surface, 230 deformation body top surface, 231 rib, 232 rib top surface, 233 parallel unit, 234 first stop portion,

[0097] 300 sealing ring, 301 outer circumference, 302 inner circumference, 303 front end of the sealing ring, 304 rear end of the sealing ring, 305 first protruding structure, 306 first boss, 307 first position limiting structure, 308 connecting part, 309 position limiting part, 310 guiding structure, 311 second protruding structure, 312 second boss, 313 slope,

[0098] 400 gaps,

[0099] 500 flexible circuit board, 501 first through hole, 502 second through hole,

[0100] 600 control circuit board,

[0101] 700 is a lead-out structure, 701 is a nickel strip, 702 is a connecting plate, 703 is a first connecting portion, and 704 is a second connecting portion. DETAILED DESCRIPTION

[0102] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0103] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0104] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0105] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0106] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0107] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0108] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0109] This embodiment provides a power-assisted riding device, such as Figure 1 and Figure 2 As shown, the power-assisted riding device includes a shell 100, a battery pack 200 and a sealing ring 300. The shell 100 includes a shell body 101 and an end cover 104. The shell body 101 is in a long strip shape, with openings at its left and right ends and a hollow chamber 102 inside that communicates with the openings at the left and right ends. The battery pack 200 is assembled in the hollow chamber 102. An end cover 104 is respectively provided at the openings at the left and right ends of the shell body 101. The sealing ring 300 is provided at the connection between the end cover 104 and the shell body 101, and is used to seal the shell body 101 and the end cover 104. Please refer to Figure 3 The left and right end openings of the housing body 101 are each provided with an end cap 104. The connection between the left end of the housing body 101 and the end cap 104 is as follows: Figure 4 As shown, the connection between the right end of the housing body 101 and the end cover 104 is as shown in FIG. Figure 5 shown.

[0110] See also Figures 6 to 12, a convex rib 105 is provided on one side of the end cover 104 for connection with the shell body 101, and a plurality of limiting grooves 106 are provided on the side of the convex rib 105 away from the end cover 104. A first protruding structure 305 is provided on the outer circumferential surface 301 of the sealing ring 300, and a first limiting structure 307 is provided on the inner circumferential surface 302 of the sealing ring 300. The first limiting structure 307 includes a connecting portion 308 and a limiting portion 309. When the sealing ring 300 is installed on the end cover 104 along the axial direction, the connecting portion 308 is clamped in the limiting groove 106, and the side wall of the connecting portion 308 abuts against the side wall of the limiting groove 106 to limit the movement of the sealing ring 300 in the circumferential direction. The limiting portion 309 abuts against the inner side wall 107 of the convex rib 105, and the inner circumferential surface 302 of the sealing ring 300 abuts against the outer side wall 107 of the convex rib 105. 8 abuts against each other to limit the movement of the sealing ring 300 in the radial direction, thereby fixing the sealing ring 300 on the end cover 104. When the shell body 101 is combined with the end cover 104 equipped with the sealing ring 300, the shell body 101 squeezes the first protruding structure 305 on the outer peripheral wall of the sealing ring 300, so that the sealing ring 300 is compressed in the space between the shell body 101 and the end cover 104. The sealing ring 300 completely fills the gap between the shell body 101 and the end cover 104. There is no gap at the connection between the shell body 101 and the end cover 104, and substances such as water and oil cannot enter the shell 100, so the sealing effect is good. Since the connection portion 308 of the sealing ring 300 cooperates with the limiting groove 106 to limit the circumferential movement of the sealing ring 300, and the inner circumferential surface 302 of the sealing ring 300 and the limiting portion 309 cooperate with the convex rib 105 to limit the radial movement of the sealing ring 300, when the outer shell body 101 squeezes the sealing ring 300, the sealing ring 300 will not move or warp, which can ensure that the sealing ring 300 is in close contact with the outer shell body 101 and the end cover 104, thereby improving the sealing effect and assembly efficiency.

[0111] Among them, the sealing ring 300 is made of silicone material and has a certain amount of tensile deformation. The rib 105 is a closed ring structure. The shape of the sealing ring 300 is adapted to the shape of the rib 105, and the length of the outer wall 108 of the rib 105 is slightly larger than the length of the inner circumference 302 of the sealing ring 300, so that the sealing ring 300 is slightly stretched after being sleeved on the rib 105. The sealing ring 300 can be tightly attached to the outer wall of the rib 105 without any gap between the two. The sealing ring 300 is effectively installed and the sealing effect is good.

[0112] In a possible implementation, the sealing ring 300 is an axisymmetric structure, the number of the first limiting structures 307 is multiple, and the first limiting structures 307 are also symmetrically arranged. Fig. 9As shown, the sealing ring 300 is approximately a regular hexagon, and the inner circumference 302 of the sealing ring 300 is provided with eight first limiting structures 307, the two upper first limiting structures 307 are symmetrical with the two lower first limiting structures 307, and the two left first limiting structures 307 are symmetrical with the two right first limiting structures 307. The shape of the convex rib 105 is adapted to the shape of the sealing ring 300, and is also an axisymmetric structure. The limiting grooves 106 on the convex rib 105 correspond one-to-one to the first limiting structures 307 on the sealing ring 300. Specifically, the limiting grooves 106 extend from the side of the convex rib 105 away from the end cover 104 to the side close to the end cover 104, and each limiting groove 106 passes through the inner wall 107 and the outer wall 108 of the convex rib 105, and the depth of the limiting grooves 106 is less than the height of the convex rib 105, as shown in FIG. Figure 8 shown.

[0113] The limiting portion 309 can be in various shapes, such as a cylinder, a hemisphere, etc. The orthographic projection area of ​​the limiting portion 309 on the inner circumference 302 of the sealing ring 300 is partially located outside the orthographic projection area of ​​the connecting portion 308 on the inner circumference 302 of the sealing ring 300. Preferably, in one embodiment, the orthographic projection area of ​​the limiting portion 309 on the inner circumference 302 of the sealing ring 300 is larger than the orthographic projection area of ​​the connecting portion 308 on the inner circumference 302 of the sealing ring 300, so as to ensure that when the connecting portion 308 is accommodated in the limiting groove 106, a part of the limiting portion 309 is always in contact with the rib 105, so as to prevent the first limiting structure 307 from sliding out of the limiting groove 106, thereby achieving effective circumferential limitation. In a possible implementation, as Fig.11 As shown, in the long axis direction of the sealing ring 300 , the limiting portion 309 and the connecting portion 308 form a T-shape. A surface of the limiting portion 309 opposite to the inner circumferential surface 302 of the sealing ring 300 abuts against the rib 105 .

[0114] The first protrusion structure 305 includes at least one circle of first bosses 306 that are continuously distributed along the outer circumference 301 of the sealing ring 300 and form a closed loop structure. Arranging multiple circles of first bosses 306 can enhance the sealing effect. Specifically, the cross section of the first boss 306 decreases from the end close to the sealing ring 300 to the end away from the sealing ring 300. Fig.10 The outer peripheral surface 301 of the sealing ring 300 is provided with three circles of first bosses 306 at intervals. The end of the first boss 306 away from the sealing ring 300 is thinner than the end close to the sealing ring 300, so that the first boss 306 is more easily squeezed by the shell body 101 and deformed. In this way, the installation can be completed without applying a large thrust on the shell body 101 or the end cover 104 during assembly.

[0115] Please continue to see Figure 7A circle of guide grooves 109 are also provided on the outer periphery of the convex rib 105 along the end cover 104, and the front end 303 of the sealing ring is located in the guide groove 109. The guide groove 109 can limit the front end of the sealing ring 300, and the rear end 304 of the sealing ring cooperates with the convex rib 105 through the first limiting structure 307 to limit the rear end of the sealing ring 300, ensuring that the sealing ring 300 will not move or twist when subjected to external force. At the same time, the front end of the sealing ring 300 abuts against the guide groove 109 and can also play a sealing role.

[0116] See also Figure 8-Figure 14 In addition, the front end 303 of the sealing ring is also provided with a guide structure 310 for guiding the sealing ring 300 to enter the guide groove 109. The guide structure 310 can provide sufficient guiding effect for the sealing ring 300 during the assembly process. In order to enhance the sealing performance between the front end 303 of the sealing ring and the guide groove 109, a structure matching the guide structure 310 of the sealing ring 300 can also be provided on the guide groove 109. In a possible implementation, the guide structure 310 can be a slope 313 connecting the front end face of the sealing ring and the outer peripheral surface 301. The slope 313 has an inclination of 30° to 60°. The outer groove wall 110 of the guide groove 109 is an inclined surface. The slope 313 is sealed with the inclined surface. The sealing ring 300 is matched with the inclined surface of the guide groove 109. The two are closely fitted and have a good sealing effect.

[0117] See also Figure 8 The inner circumference 302 of the sealing ring 300 is also provided with a second protrusion structure 311. Similar to the first protrusion structure 305, the second protrusion structure 311 includes at least one circle of second bosses 312 continuously distributed along the inner circumference 302 of the sealing ring 300 and forming a closed-loop structure. When the sealing ring 300 is assembled between the end cover 104 and the shell body 101, the first boss 306 on the outer circumference 301 of the sealing ring 300 is squeezed and deformed by the shell body 101, filling the gap 400 between the outer circumference 301 of the sealing ring 300 and the shell body 101, and the second boss 312 on the inner circumference 302 of the sealing ring 300 is squeezed and deformed by the rib 105, filling the gap 400 between the inner circumference 302 of the sealing ring 300 and the rib 105, thereby improving the sealing effect.

[0118] The second boss 312 is arranged away from the first limiting structure 307, so that the second boss 312 will not be disconnected by the first limiting structure 307, and a closed loop structure can be formed. There is no gap when the second boss 312 of the closed loop structure abuts against the rib 105, which can ensure effective sealing. Fig.12 In the structure shown, the second protruding structure 311 is close to the front end of the inner circumferential surface 302 of the sealing ring 300 .

[0119] The first boss 306 disposed on the outer circumference 301 of the sealing ring 300 and the second boss 312 disposed on the inner circumference 302 of the sealing ring 300 are staggered to balance the force-bearing surface of the sealing ring 300. The cross section of the second boss 312 decreases from the end close to the sealing ring 300 to the end away from the sealing ring 300. When the sealing ring 300 is sleeved on the rib 105, the side of the second boss 312 with a smaller wall thickness contacts the rib 105 first, and is easily deformed, thereby ensuring effective sealing between the inner circumference 302 of the sealing ring 300 and the rib 105.

[0120] The assembly process of the shell 100 and the battery pack 200 is as follows: the sealing ring 300 is put on the convex rib 105 of the end cover 104, the second protrusion structure 311 of the inner circumferential surface 302 of the sealing ring 300 is interference fit with the outer wall 108 of the convex rib 105, and the first limiting structure 307 on the sealing ring 300 is pressed into the limiting groove 106 on the convex rib 105, so that the inner and outer walls 108 of the convex rib 105 are respectively abutted against the inner circumferential surface 302 of the sealing ring 300 and the limiting portion 309. At this time, the movement of the sealing ring 300 in the circumferential and radial directions is restricted. It is worth noting that the inner circumferential surface 302 of the sealing ring 300 is interference fit with the outer wall of the convex rib 105, and then the end cover 104 equipped with the sealing ring 300 is combined with the shell body 101 equipped with the battery pack 200 (such as Figure 2 As shown), during the combination process, the end of the shell body 101 enters between the outer circumferential surface 301 of the sealing ring 300 and the limiting column 111 of the end cover 104 along the axial direction. Since the thickness of the shell body 101 is greater than the distance between the outer circumferential surface 301 of the sealing ring 300 and the limiting column 111, the shell body 101 will squeeze the first protruding structure 305 on the outer circumferential surface 301 of the sealing ring 300 and deform the first protruding structure 305. The first protruding structure 305 and the shell body 101 have an interference fit, and the front end of the sealing ring 300 enters the guide groove 109 outside the rib 105. The slope 313 at the front end of the sealing ring 300 is tightly abutted against the inclined surface of the guide groove 109. At this point, the gap at the connection between the shell body 101 and the end cover 104 is completely filled by the sealing ring 300, and a closed space is formed in the shell 100 to prevent the battery pack 200 from getting water or getting damp.

[0121] The structure of connecting the end cover 104 and the housing body 101 through the sealing ring 300 has the following beneficial effects:

[0122] 1. The first protruding structure 305 is arranged on the outer circumferential surface 301 of the sealing ring 300. During the press-fitting process, the first protruding structure 305 is squeezed and deformed, and the end surface of the first protruding structure 305 is approximately or completely flush with the end surface of the rest of the outer circumferential surface 301 of the sealing ring 300, so that the connection between the end cover 104 and the shell body 101 can be sealed to achieve sealing of the entire machine.

[0123] 2. The connecting portion 308 of the first limiting structure 307 is clamped in the limiting groove 106 of the convex rib 105, and the connecting portion 308 uses its side wall 208 to abut against the side wall 208 of the limiting groove 106 to limit the circumferential movement of the sealing ring 300; the limiting portion 309 of the first limiting structure 307 abuts against the inner wall 107 of the convex rib 105, and the inner circumferential surface 302 of the sealing ring 300 abuts against the outer wall 108 of the convex rib 105 to limit the radial movement of the sealing ring 300.

[0124] 3. The slope 313 provided at the front end of the sealing ring 300 can guide the sealing ring 300 during the docking and press-fitting process between the shell body 101 and the end cover 104. Since the sealing ring 300 is made of silicone, the design of the slope 313 structure can make room for part of the material during the deformation of the sealing ring 300, thereby ensuring simple assembly. The slope 313 structure is adapted to the shape of the guide groove 109 on the end cover 104, and the slope 313 at the front end of the sealing ring 300 can fit tightly with the inclined surface in the guide groove 109 during the assembly process. The guide groove 109 is an inwardly concave countersunk structure, which can ensure that the front end 303 of the sealing ring is effectively sunk into the end cover 104, and the sealing reliability can be ensured even if there is an error in the processing of the end of the sealing ring 300.

[0125] 4. A second protruding structure 311 is provided on the inner circumferential surface 302 of the sealing ring 300 . The second protruding structure 311 abuts against the outer side wall 108 of the rib 105 to achieve sealing between the sealing ring 300 and the end cover 104 .

[0126] The battery pack 200 is detachably mounted in the hollow chamber 102 of the outer shell body 101. The battery pack 200 includes a plurality of battery cells 202, each of which includes a battery cell shell 204 and a battery cell 203 accommodated in the battery cell shell 204. A second limiting structure 224 is provided on the outer wall 205 of the battery cell shell 204. When the battery pack 200 is mounted in the outer shell body 101, the second limiting structure 224 abuts against the inner wall 103 of the outer shell body 101.

[0127] The power-assisted riding device of this embodiment is a fully wrapped structure. Fig.15 As shown, the cell shell 204 wraps the cell 203, and the shell body 101 wraps the cell shell 204. The heat generated by the cell 203 during operation is conducted away through the cell shell 204 and the shell body 101. Both the cell shell 204 and the shell body 101 are made of materials with good thermal conductivity and can be injection molded.

[0128] The cell housing 204 has a plurality of cell compartments 215, and the cell 203 is assembled in the cell compartments 215. The edges of the cell compartments 215 are chamfered to facilitate the loading of the cell 203, and the chamfer angle is 10° to 30°. The outer wall 205 of the cell housing 204 includes a top wall 206, a bottom wall 207 opposite to the top wall 206, and two side walls 208 connecting the top wall 206 and the bottom wall 207, wherein the side wall 208 is an arc surface protruding outward, and the flatness of the top wall 206 and the bottom wall 207 is greater than the flatness of the side wall 208. The outer wall 205 of the cell housing 204 is also provided with a plurality of first hollow portions 221 connected to the cell compartments 215, and the heat generated by the cell 203 can be dissipated through the first hollow portions 221, and can provide a fulcrum when disassembling. Specifically, the first hollow portion 221 may be provided on the top wall 206 , the bottom wall 207 and the side wall 208 of the battery cell housing 204 .

[0129] In order to facilitate the mold opening and demolding of the cell housing 204, ribs 231 are provided on the top wall 206 and the bottom wall 207 of the cell housing 204, and the ribs 231 extend along the long axis of the cell housing 204. Since the ribs 231 protrude from the outer wall 205 of the cell housing 204, after the cell housing 204 is assembled in the shell body 101, there are some gaps between the top wall 206 of the cell housing 204 and the shell body 101, and between the bottom wall 207 of the cell housing 204 and the shell body 101. A second limiting structure 224 can be provided on the top wall 206 and / or the bottom wall 207 of the cell housing 204, and the shell body 101 is supported by the second limiting structure 224 to reduce or avoid displacement between the cell housing 204 and the shell body 101.

[0130] In one possible implementation, the top wall 206 and the bottom wall 207 of the battery cell housing 204 are both provided with a second limiting structure 224, and a rib 231 is provided on each side of the second limiting structure 224. The protruding direction of the rib 231 is the same as the protruding direction of the adjacent limiting block 225. After the battery pack 200 is installed into the outer shell body 101, the limiting block 225 and the rib 231 are both in contact with the inner wall 103 of the outer shell body 101.

[0131] The second limiting structure 224 includes at least one limiting block 225, which is an injection molded part. Each limiting block 225 includes a base 226 and a deformation body 227. The base 226 is fixed on the battery shell 204, and the deformation body 227 is connected to the base 226 and abuts against the shell body 101. A second hollow portion 222 is provided on the base 226 at a position corresponding to the first hollow portion 221. The second hollow portion 222 is connected to the first hollow portion 221, and the heat generated by the battery 203 can be conducted to the shell body 101 through the first hollow portion 221 and the second hollow portion 222. It is worth noting that the base 226 is protruding from the battery shell 204, and a part of the deformation body 227 is connected to the base 226 and the other part is suspended, so that the deformation body 227 can conduct the extrusion force to the base 226 under the extrusion of the shell body 101, so as to avoid the deformation body 227 from breaking due to stress concentration. In a possible implementation, in the longitudinal section of the battery cell housing 204, the deformation body 227 and the base 226 form a C shape or an L shape. Before the battery pack 200 is installed in the outer shell body 101, the top surface 230 of the deformation body protrudes from the rib top surface 232 of the rib 231, and the protrusion height is 0.2mm-0.5mm. After the battery pack 200 is installed in the outer shell body 101, the top surface 230 of the deformation body is flush with the rib top surface 232. The length of the deformation body 227 extending in the axial direction of the outer shell body 101 is between 5.0-6.0mm. The distance from the bottom surface of the deformation body surface 227 to the outer surface of the battery cell housing 204 is between 1.6-1.8mm.

[0132] In a possible implementation, a first stopper 234 is further provided on the outer wall 205 of the cell housing 204, and a second stopper 112 is provided on the inner wall of the outer shell body 101. When the battery pack 200 is assembled in the hollow chamber 102, the first stopper 234 is close to or abuts against the second stopper 112 to limit the displacement of the cell housing 204 in the outer shell body 101. A third stopper 113 is further provided on the outer wall 205 of the cell housing 204, and a fourth stopper 114 is provided on the inner wall of the outer shell body 101. When the battery pack 200 is assembled in the hollow chamber 102, an installation gap 115 is formed between the third stopper 113 and the fourth stopper 114 to adjust the installation position of the battery pack 200.

[0133] See also Fig.16The first stopper 234 is provided on the bottom wall 207, the second stopper 112 is provided on the inner wall of the shell body 101 at a position corresponding to the bottom wall 207, the third stopper 113 is provided on the top wall 206 and is provided corresponding to the first stopper 234, and the fourth stopper 114 is provided on the inner wall of the shell body 101 at a position corresponding to the top wall 206. When the first stopper 234 on the bottom wall 207 of the cell housing 204 is close to or abuts against the inner wall of the shell body 101, the third stopper 113 on the top wall 206 of the cell housing 204 and the fourth stopper 114 on the inner wall of the shell body 101 may abut against or have a gap, that is, the size of the installation gap 115 is adjusted according to the specific matching relationship between the outer wall of the cell housing 204 and the inner wall of the shell body 101, thereby reducing the dimensional accuracy requirements for matching between the cell housing and the shell body, and facilitating installation.

[0134] exist Fig.16 In the structure shown, the top wall 206 of the battery cell shell 204 is abutted against the outer shell body 101 through the deformation body 227, and the battery cell shell 204 is firmly supported in the outer shell body 101, limiting the movement of the battery cell shell 204 in the vertical direction, and the bottom wall 207 of the battery cell shell 204 is radially limited to the outer shell body 101 through the first stopper 234, limiting the movement of the battery cell shell 204 in the horizontal direction, so that the battery cell shell 204 is stably fixed in the outer shell body 101, avoiding shaking in the battery cell shell 204.

[0135] The cell case 204 includes one or more sub-cases 209 . When the cell case 204 includes a plurality of sub-cases 209 , the plurality of sub-cases 209 are arranged along the long axis of the cell case 204 .

[0136] exist Fig. 20 In the battery cell 203 unit shown, the battery cell housing 204 includes two sub-housings, each of which is provided with a stopper 225, and the sub-housing 209 is integrally formed with the stopper 225 provided on the sub-housing 209. The two stopper blocks 225 are arranged opposite to each other, and the deformation bodies 225 respectively formed on the two stopper blocks are also arranged opposite to each other.

[0137] The deformation body 227 is provided with an inclined surface for guiding the shell body 101 to enter and exit. Specifically, the inclined surface may include a first inclined surface 228 and a second inclined surface 229 provided on the deformation body 227, and the extension surface of the first inclined surface 228 and the extension surface of the second inclined surface 229 intersect on the longitudinal section of the battery cell housing 204. The inclination angles of the first inclined surface 228 and the second inclined surface 229 are 20° to 40°. During the assembly and disassembly of the battery pack 200 and the outer shell body 101, under the action of the installation push force, the first inclined surface 228 on one limit block 225 and the second inclined surface 229 on the other limit block 225 can abut against the inner wall 103 of the outer shell body 101, and under the action of the disassembly pull-out force, the second inclined surface 229 on one limit block 225 and the first inclined surface on the other limit block 225 can abut against the inner wall 103 of the outer shell body 101, thereby always having a guiding effect, making the assembly or disassembly process smoother and avoiding jamming or breakage of the limit block 225. The deformation body 227 is also provided with a deformation body top surface 230 connecting the first inclined surface 228 and the second inclined surface 229. When the battery pack 200 is assembled in the hollow chamber 102, the deformation body top surface 230 is in surface contact with the inner wall 103 of the outer shell body 101, which can increase the friction between the deformation body 227 and the outer shell body 101, so that the outer shell body 101 and the battery cell shell 204 are relatively fixed. The connection between the first inclined surface 228 and the deformation body top surface 230 adopts an arc structure transition, and / or the connection between the second inclined surface 229 and the deformation body top surface 230 adopts an arc structure transition.

[0138] Please continue to refer to Fig. 20 , one of the two sub-shells of the battery cell shell 204 has a concave platform 211 on its mating surface, and the other sub-shell has a convex platform 212 on its mating surface; when the two sub-shells are mated, the concave platform 211 and the convex platform 212 are engaged, and the concave and convex platforms 212 are provided at the joint of the sub-shells 209 to prevent assembly errors and improve efficiency. During installation, the battery cells 203 are first sequentially loaded into the first sub-shell 209, and then the second sub-shell 209 is press-fitted with the first sub-shell 209. When the two sub-shells are mated, the concave platform 211 on the first sub-shell 209 is engaged with the convex platform 212 on the second sub-shell 209, and the stop block 225 of the first sub-shell 209 is opposite to the stop block 225 of the second sub-shell 209.

[0139] exist Fig.21In the structure shown, there are ten battery cell compartments 215, three battery cell compartments 215 are arranged near the top wall 206 and the bottom wall 207, four battery cell compartments 215 are arranged in the middle, and the four battery cell compartments 215 in the middle are staggered with the three battery cell compartments 215 near the top wall 206 and the bottom wall 207. The above staggered arrangement can be understood as selecting two battery cell compartments 215 that are close to the top wall 206 and the bottom wall 207 and are arranged opposite to each other, and then selecting two other battery cell compartments 215 located in the middle and adjacent to the above two battery cell compartments 215, the center line of the two battery cell compartments 215 located on both sides is the first straight line, and the two battery cell compartments 215 located in the middle are symmetrically arranged about the first straight line. The ratio of the distance that the battery cell compartment 215 located in the middle and the outermost part protrudes outward in the arrangement direction compared with the battery cell compartments 215 located on both sides to the diameter of the battery cell compartment 215 is between 0.48 and 0.52. This design makes it easier to mold the cell housing 204, which can reduce the cost of mold making. On the other hand, it makes the cell housing 204 evenly stressed, avoiding stress concentration and deformation of the cell housing 204. In addition, the cell housing 204 adopts a side wall 208 wrapping structure, and multiple cells 203 are directly filled in the cavity of the cell housing 204, so that multiple cells 203 can be orderly and compactly combined together, and the space of the cells 203 is fully utilized, and the structure is compact and the volume is small.

[0140] See also Fig.16 , multiple battery cells 202 are connected along the long axis of the battery cell 203 to form a battery pack 201, the battery pack 201 is in the shape of a long strip, the battery cells 202 in the battery pack 201 are connected end to end, the second limiting structures 224 of the top walls 206 of the multiple battery cells 202 are arranged in a row along the long axis of the battery cell 203, and the second limiting structures 224 of the bottom walls 207 of the multiple battery cells 202 are arranged in a row along the long axis of the battery cell 203.

[0141] Multiple battery cells 202 are connected together by a locking structure. The locking structure includes a first locking piece 217, a second locking piece 218, a screw 219 and a nut 220. The screw 219 passes through the first locking piece 217, multiple orderly arranged battery cells 202 and the second locking piece 218 in sequence and is threadedly connected with the nut 220. Among them, the battery cell shell 204 of the battery cell 202 is provided with a mounting hole 216, and the mounting hole 216 is arranged along the long axis of the battery cell shell 204 and passes through both ends of the battery cell shell 204, and the screw 219 penetrates the mounting hole 216. The head of the screw 219 adopts a countersunk head type or a flat head type, which can reduce the height in the axial direction, among which the flat head type has a stronger structure. The head of the screw 219 can also be a cross or plum blossom structure, and the nut 220 adopts a hexagonal nut 220, which is convenient for installation and disassembly.

[0142] A control circuit board 600 is provided at the front end of the battery pack 201 , a flexible circuit board 500 is provided at the bottom of the battery pack 201 , the flexible circuit board 500 is electrically connected to the control circuit board 600 , and the battery unit 202 is electrically connected to the flexible circuit board 500 via a lead-out structure 700 .

[0143] The lead-out structure 700 includes a nickel strip 701 and a connecting plate 702 disposed at the end of the battery unit 202. The nickel strip 701 is electrically connected to the battery cell 203 of the battery unit 202 and the connecting plate 702, respectively, and the connecting plate 702 is electrically connected to the flexible circuit board 500. An insulating sheet is also disposed between two nickel strips 701 that are connected to different battery units 202 and are opposite to each other. The insulating sheet may be a silicone gasket, which can solve the problem of insulation between the two battery units 202, ensure the overall insulation and high safety factor of the power-assisted riding device, and is not prone to ignition and connection errors.

[0144] See also Fig.24 The nickel strip 701 has a first connection part 703 and a second connection part 704. The first connection part 703 is a circular ring structure adapted to the end face of the battery cell 203. The second connection part 704 is a sheet structure arranged in the circular ring structure and connected to the circular ring structure. The second connection part 704 protrudes to one side relative to the first connection part 703. The first connection part 703 is connected to the positive or negative electrode of the battery cell 203, and the second connection part 704 is welded to the connecting plate 702. Compared with the wire connection method in the prior art, the nickel strip 701 in this embodiment is a sheet structure, which is easy to fix, making the welding process of the battery cell 203 easier, and can avoid the confusion of wire connection and reduce the wire management process.

[0145] The flexible circuit board 500 extends along the long axis of the battery cell 203 and covers each battery unit 202 on the battery pack 201. The middle part of the flexible circuit board 500 is supported by the second limiting structure 224, and the two sides of the flexible circuit board 500 are respectively in contact with the ribs 231 on the two sides of the second limiting structure 224. The part of the flexible circuit board 500 that is not in contact with the second limiting structure 224 and the ribs 231 is suspended relative to the battery cell housing 204. Since the battery pack 201 is a fully wrapped structure, the heat generated by the battery cell 203 is conducted out through the battery cell housing 204. The heat conduction effect of this method is better than that of air. If the flexible circuit board 500 contacts the battery cell housing 204 over a large area, the temperature of the flexible circuit board 500 will be too high. In this embodiment, the flexible circuit board 500 is in contact with the battery cell housing 204 only in the middle and both ends, and the other parts are in a suspended state. The temperature of the suspended part is lower than that of the contact part. The flexible circuit board 500 is less affected by the temperature of the battery cell housing 204, which can ensure that the flexible circuit board 500 works effectively.

[0146] Specifically, the flexible circuit board 500 is suspended relative to the connecting plate 702, so that the connecting plate 702 and the flexible circuit board 500 have a larger space during welding, which is convenient for welding. The height of the two sides of the flexible circuit board is consistent with the height of the upper surface of the base 226 of the second limiting structure 224, so that the flexible circuit board is generally flat after assembly, which is more convenient for leading out and welding of the connecting plate 702.

[0147] The flexible circuit board is provided with a first through hole 501 for the deformation body 227 to pass through, and the flexible circuit board is provided with a second through hole 502 at a position corresponding to the second hollow portion 222, and the second through hole 502 is connected to the second hollow portion 222. The heat generated by the battery cell 203 can be transferred out through the second hollow portion 222 and the first through hole 501, thereby reducing the heat conducted to the flexible circuit board 500.

[0148] The height of the flexible circuit board from the outer wall 205 of the battery cell shell 204 is less than the height of the rib 231 protruding from the outer wall 205 of the battery cell shell 204. This design ensures that after the battery pack 200 is installed in the outer shell body 101, the flexible circuit board 500 is between the bottom wall 207 of the battery cell shell 204 and the outer shell body 101, and the flexible circuit board is suspended relative to the outer shell body 101, so that the flexible circuit board 500 has better anti-twisting performance, while reducing the influence of thermal conductivity of the outer shell body 101 on the flexible circuit board.

[0149] Based on the characteristic of the flexible circuit board itself as a soft board, this embodiment places the middle part of the flexible circuit board on the base 226, and the two ends of the flexible circuit board in the width direction are placed on the outer wall of the battery cell housing 204 on both sides of the base 226 and close to the ribs 231. The plane where the bottom surfaces of both sides of the flexible circuit board 500 are located is tangent to the outer wall of the battery cell housing 204 to achieve three-point support. Except for the above-mentioned contact part between the flexible circuit board and the battery cell housing 204, the rest of the flexible circuit board and the battery cell housing 204 are suspended relative to the battery cell housing 204, thereby increasing the welding area, thereby reducing the welding difficulty between the flexible circuit board and the connecting plate 702, and reducing the influence of the thermal conductivity of the battery cell housing 204 on the flexible circuit board.

[0150] See also Fig.16The battery pack 201 includes four battery cells 202, each of which contains ten battery cells 203. The battery cells 203 of the four battery cells 202 form four parallel units 233, each of which contains ten battery cells 203 connected in series. The positive and negative electrodes of each parallel unit 233 are led out to the flexible circuit board 500 through the nickel sheet and the connecting plate 702. Compared with the prior art technology of leading the wire to the front end of the battery pack 201, the length of the lead can be reduced. The use of the nickel strip 701 for connection avoids the problem of difficult lead management and maintenance, and can monitor the capacity of each parallel unit 233. In addition, the flexible circuit board 500 is also integrated with an NTC temperature control module, which can monitor the temperature of each parallel unit 233, realize fixed-point monitoring, and be more intelligent.

[0151] See also Fig.19 For a single battery unit 202, the positive poles of the four cells 203 on the lower right side face outwards and are connected in parallel via the nickel strip 701, the negative poles of the two cells 203 on the upper right side face outwards and are connected in parallel via the nickel strip 701, and the negative poles of the four cells 203 on the left side face outwards and are connected in parallel via the nickel strip 701. Fig.25 There are four dotted boxes in the figure, each dotted box represents a parallel unit 233. Take a parallel unit 233 marked with ① to ③ in the figure as an example, ① represents the four electrodes on the left side of the battery unit 202, ② represents the four cells 203 on the lower right side of the battery unit 202, and ③ represents the two cells 203 on the upper right side of the battery unit 202; the negative electrode of ① is led outward and connected to the total negative electrode of the circuit board, and the positive electrode of ① is connected to the negative electrode of ② inward to complete the first series connection; the positive electrode of ② is led outward and connected to the negative electrode of ③ outward, where ③ of the first battery unit 202 is connected in parallel with ③ of the second battery unit 202 to complete the second series connection, and so on, to complete the connection of four battery units 202. The voltage of each cell 203 is 3.6V, and the ten cells 203 of the four parallel units 233 complete nine series connections in total, effectively outputting a voltage of 36V.

[0152] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A power-assisted riding device, characterized in that: include: A housing (100) comprising a housing body (101) having a hollow chamber (102); A battery pack (200) is detachably mounted in the hollow chamber (102), the battery pack (200) comprising a plurality of battery cells (202), each of the battery cells (202) comprising a battery cell shell (204) and a battery cell (203) accommodated in the battery cell shell (204), a rib (231) and a second limiting structure (224) are provided on an outer wall (205) of the battery cell shell (204), the second limiting structure (224) comprising at least one limiting block (225 ), the limit block (225) comprises a base (226) protruding from the battery cell shell (204) and a deformation body (227) connected to the base (226), and the deformation body (227) is provided with an inclined surface for guiding the outer shell body (101) to enter and exit; when the battery pack (200) is assembled in the hollow chamber (102), the deformation body (227) abuts against the outer shell body (101), and the rib (231) is close to the outer shell body (101).

2. The device according to claim 1, characterized in that After the deformation body (227) abuts against the outer shell body (101), the deformation body (227) is suspended relative to the outer wall (205) of the battery cell shell (204).

3. The device according to claim 1, characterized in that The inclined surface comprises a first inclined surface (228) and a second inclined surface (229) provided on the deformation body (227); an extension surface of the first inclined surface (228) and an extension surface of the second inclined surface (229) intersect on a longitudinal section of the battery cell casing (204).

4. The device according to claim 3, characterized in that The deformation body (227) is also provided with a deformation body top surface (230) connecting the first inclined surface (228) and the second inclined surface (229); when the battery pack (200) is assembled in the hollow chamber (102), the deformation body top surface (230) is in surface contact with the inner wall (103) of the outer shell body (101).

5. The device according to claim 1, characterized in that The ribs (231) are distributed along the long axis of the battery core (203), and the protruding direction of the ribs (231) is the same as the protruding direction of the adjacent limiting blocks (225).

6. The device according to claim 5, characterized in that A rib (231) is provided on each side of the second limiting structure (224).

7. The device according to claim 5, characterized in that Before the battery pack (200) is installed in the outer shell body (101), the top surface (230) of the deformation body protrudes from the rib top surface (232) of the rib (231); after the battery pack (200) is installed in the outer shell body (101), the top surface (230) of the deformation body is flush with the rib top surface (232), and the bottom surface of the deformation body is suspended from the outer wall (205) of the battery cell shell (204).

8. The device according to claim 7, characterized in that Before the battery pack (200) is installed in the outer shell body (101), the top surface (230) of the deformable body protrudes by 0.2 mm to 0.5 mm compared to the top surface (232) of the rib.

9. The device according to claim 3, characterized in that The inclination angles of the first inclined surface (228) and the second inclined surface (229) are 20° to 40°.

10. The device according to claim 3, characterized in that The connection between the first inclined surface (228) and the top surface (230) of the deformation body adopts an arc structure transition, and / or the connection between the second inclined surface (229) and the top surface (230) of the deformation body adopts an arc structure transition. Preferably, a portion of the deformation body (227) is connected to the base (226) and another portion is suspended in the air, and the deformation body (227) can transmit the extrusion force to the base (226) under the extrusion of the shell body (101). Preferably, in the longitudinal section of the battery cell housing (204), the deformation body (227) and the base body (226) form a C-shape or an L-shape. Preferably, a first stopper (234) is further provided on the outer wall (205) of the battery cell housing (204), and a second stopper (112) is provided on the inner wall of the outer shell body (101); when the battery pack (200) is assembled in the hollow chamber (102), the first stopper (234) and the second stopper (112) are close to or abutted against each other, so as to limit the displacement of the battery cell housing (204) in the outer shell body (101); A third stopper (113) is also provided on the outer wall (205) of the battery cell housing (204), and a fourth stopper (114) is provided on the inner wall of the outer shell body (101). When the battery pack (200) is assembled in the hollow chamber (102), an installation gap (115) is formed between the third stopper (113) and the fourth stopper (114) to adjust the installation position of the battery pack (200). Preferably, the outer wall (205) of the battery cell housing (204) includes a top wall (206), a bottom wall (207) opposite to the top wall (206), and two side walls (208) connecting the top wall (206) and the bottom wall (207); the second limiting structure (224) is arranged on the top wall (206) and / or the bottom wall (207); the battery cell housing (204) has a plurality of battery cell compartments (215), and the battery cells (203) are assembled in the battery cell compartments (215). Preferably, the side wall (208) is an arc surface protruding outward, and the flatness of the top wall (206) and the bottom wall (207) is greater than the flatness of the side wall (208). Preferably, the first stopper (234) is provided on the bottom wall (207), and the second stopper (112) is provided on the inner wall of the housing body (101) at a position corresponding to the bottom wall (207); The third stop portion (113) is arranged on the top wall (206) and corresponds to the first stop portion (234), and the fourth stop portion (114) is arranged on the inner wall of the shell body (101) at a position corresponding to the top wall (206). Preferably, the edge of the battery cell compartment (215) is provided with a chamfer for guiding the battery cell (203) to enter. Preferably, the chamfer is 10° to 30°. Preferably, a plurality of first hollow portions (221) are provided on the outer wall (205) of the battery cell housing (204), and the first hollow portions (221) are connected to the battery cell compartment (215). Preferably, a second hollow portion (222) is provided on the base (226) at a position corresponding to the first hollow portion (221), and the second hollow portion (222) is connected to the first hollow portion (221). Preferably, the limit block (225) is an injection molded part. Preferably, the number of the battery cell compartments (215) is ten, three battery cell compartments (215) are respectively arranged near the top wall (206) and the bottom wall (207), four battery cell compartments (215) are arranged in the middle, and the four battery cell compartments (215) in the middle are staggered with the three battery cell compartments (215) near the top wall (206) and the bottom wall (207). Preferably, the ratio of the distance that the battery cell compartment (215) located in the middle and outermost part protrudes outward in the arrangement direction compared to the battery cell compartments (215) located on both sides to the diameter of the battery cell compartment (215) is between 0.48 and 0.

52. Preferably, the battery cell shell (204) includes at least one sub-shell (209); when the battery cell shell (204) includes multiple sub-shells (209), the multiple sub-shells (209) are arranged along the long axis of the battery cell shell (204), and two adjacent sub-shells (209) are arranged opposite to each other. Preferably, the battery cell housing (204) comprises two sub-housings (209), each of the two sub-housings (209) being provided with a limit block (225), and when the two sub-housings are butt-jointed, the limit block (225) on one of the sub-housings is opposite to the limit block (225) on the other sub-housing. Preferably, the sub-housing (209) and the limiting block (225) provided on the sub-housing (209) are integrally formed. Preferably, a concave platform (211) is provided on the mating surface of one of the two sub-shells, and a convex platform (212) is provided on the mating surface of the other sub-shell; when the two sub-shells are butt-jointed, the concave platform (211) and the convex platform (212) are engaged with each other. Preferably, the battery pack (200) further comprises a flexible circuit board (500), a control circuit board (600) and a lead-out structure (700); the flexible circuit board (500) is arranged between the bottom wall (207) of the battery cell shell (204) and the outer shell body (101); the control circuit board (600) is arranged at the end of the battery pack (200) and is electrically connected to the flexible circuit board (500); and the battery unit (202) is electrically connected to the flexible circuit board (500) via the lead-out structure (700). Preferably, a plurality of the battery cells (202) are connected along the long axis of the battery core (203) to form a battery pack (201), and the second limiting structures (224) of the plurality of battery cells (202) are arranged in a row along the long axis of the battery core (203); the flexible circuit board (500) extends along the long axis of the battery core (203) and covers each battery cell (202) on the battery pack (201), the middle part of the flexible circuit board (500) is supported by the second limiting structure (224), and the two sides of the flexible circuit board (500) are respectively in contact with the ribs (231) on the two sides of the second limiting structure (224). Preferably, a mounting hole (216) is provided on the battery cell shell (204) of the battery unit (202), and the mounting hole (216) is arranged along the long axis of the battery cell shell (204) and passes through both ends of the battery cell shell (204); The battery pack (200) further comprises a locking structure for connecting the plurality of battery cells (202) together, the locking structure comprising a first locking plate (217), a second locking plate (218), a screw (219) and a nut (220), the screw (219) sequentially passing through the first locking plate (217), a plurality of orderly arranged battery cells (202) and the second locking plate (218) and then being threadedly connected to the nut (220). Preferably, the lead-out structure (700) comprises a nickel strip (701) and a connecting plate (702) provided at the end of the battery unit (202), the nickel strip (701) being electrically connected to the battery cell (203) of the battery unit (202) and the connecting plate (702), respectively, and the connecting plate (702) being electrically connected to the flexible circuit board (500). Preferably, an insulating sheet is provided between two nickel strips (701) that are respectively connected to different battery cells (202) and are opposite to each other. Preferably, the portion of the flexible circuit board (500) that is not in contact with the second limiting structure (224) and the rib (231) is suspended relative to the battery cell housing (204). Preferably, the flexible circuit board (500) is suspended relative to the connecting plate (702) to form a suspended area, and the connection point between the connecting plate (702) and the flexible circuit board (500) is located in the suspended area. Preferably, the planes where the bottom surfaces on both sides of the flexible circuit board (500) are located are tangent to the outer side walls of the battery cell housing (204), so that the heights of both sides of the flexible circuit board (500) are consistent with the height of the upper surface of the substrate (226). Preferably, the height of the flexible circuit board from the outer wall (205) of the battery cell housing (204) is less than the height of the rib (231) protruding from the outer wall (205) of the battery cell housing (204). Preferably, a first through hole (501) is provided on the flexible circuit board for the deformation body (227) to pass through, and a second through hole (502) is also provided on the flexible circuit board at a position corresponding to the second hollow portion (222), and the second through hole (502) is connected to the second hollow portion (222). Preferably, the housing (100) further comprises end covers (104) arranged on both sides of the housing body (101), and the end covers (104) are provided with limiting grooves (106) on the convex ribs (105) close to the housing body (101); The sealing ring (300) is arranged in one-to-one correspondence with the end cover (104); the outer circumferential surface (301) of the sealing ring (300) is provided with a first protruding structure (305); the inner circumferential surface (302) of the sealing ring (300) is provided with a first limiting structure (307); the first limiting structure (307) comprises a connecting portion (308) and a limiting portion (309); the connecting portion (308) is accommodated in the limiting groove (106); the limiting portion (309) abuts against the inner side wall (107) of the convex rib (105); the inner circumferential surface (302) of the sealing ring (300) abuts against the outer side wall (108) of the convex rib (105); the outer shell body (101) presses the first protruding structure (305) so that the sealing ring (300) is compressed in the space between the outer shell body (101) and the end cover (104). Preferably, the convex rib (105) is a closed annular structure, the shape of the sealing ring (300) is adapted to the shape of the convex rib (105), and the length of the inner circumferential surface (302) of the sealing ring (300) is smaller than the length of the outer side wall (108) of the convex rib (105). Preferably, the orthographic projection area of ​​the limiting portion (309) on the inner circumferential surface of the sealing ring (300) is partially located outside the orthographic projection area of ​​the connecting portion (308) on the inner circumferential surface (302) of the sealing ring (300). Preferably, the orthographic projection area of ​​the limiting portion (309) on the inner circumferential surface (302) of the sealing ring (300) is greater than the orthographic projection area of ​​the connecting portion (308) on the inner circumferential surface (302) of the sealing ring (300). Preferably, in the long axis direction of the sealing ring (300), the limiting portion (309) and the connecting portion (308) form a T-shape. Preferably, a surface of the limiting portion (309) opposite to the inner circumferential surface (302) of the sealing ring (300) abuts against the convex rib (105). Preferably, the first protruding structure (305) comprises at least one circle of first bosses (306) which are continuously distributed along the outer peripheral surface (301) of the sealing ring (300) and form a closed-loop structure. Preferably, the cross-section of the first boss (306) decreases from an end close to the sealing ring (300) to an end away from the sealing ring (300). Preferably, a circle of guide grooves (109) are provided on the end cover (104) along the outer periphery of the convex rib (105); and the front end (303) of the sealing ring enters into the guide groove (109). Preferably, a guide structure (310) for guiding the sealing ring (300) to enter the guide groove (109) is provided at the front end (303) of the sealing ring. Preferably, the guide structure (310) is a slope surface (313) connecting the front end surface and the outer peripheral surface (301) of the sealing ring. Preferably, the slope (313) has an inclination of 30° to 60°. Preferably, the outer groove wall (110) of the guide groove (109) is an inclined surface, and the slope surface (313) is sealingly matched with the inclined surface. Preferably, the convex rib (105) is provided with a plurality of limiting grooves (106), each limiting groove (106) extending from a side of the convex rib (105) away from the end cover (104) to a side close to the end cover (104), and each limiting groove (106) passes through an inner wall (107) and an outer wall (108) of the convex rib (105). Preferably, the depth of the limiting groove (106) is smaller than the height of the convex rib (105). Preferably, the inner circumferential surface (302) of the sealing ring (300) is further provided with a second protruding structure (311), and the second protruding structure (311) is sealingly matched with the outer side wall (108) of the convex rib (105). Preferably, the second protruding structure (311) comprises at least one circle of second bosses (312) continuously distributed along the inner circumferential surface (302) of the sealing ring (300) to form a closed-loop structure, and the second bosses (312) avoid the first limiting structure (307). Preferably, the cross-section of the second boss (312) decreases from an end close to the sealing ring (300) to an end away from the sealing ring (300). Preferably, the first boss (306) provided on the outer peripheral surface (301) of the sealing ring (300) and the second boss (312) provided on the inner peripheral surface (302) of the sealing ring (300) are staggered with each other. Preferably, the first limiting structure (307) is close to the rear end (304) of the sealing ring. Preferably, the sealing ring (300) is made of silicone.

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