Power-assisted bicycle battery box

Abstract

The utility model discloses a power-assisted bicycle battery box which comprises a battery box body detachably installed on a battery holder, the battery holder is fixed on a frame tube of a power-assisted bicycle, the battery box body comprises a shell, a base and a battery cell installed in the shell, a lock shell is arranged at one end of the shell, and the lock shell is connected with the base. The buckle is matched with the clamping groove, the guide strip is matched with the guide groove, the battery pack is fixed through the guide strip, the battery pack is prevented from shaking left and right, meanwhile, when the guide strip is installed on the shell, the shell moves according to the guide groove in the guide strip, front-back shaking is prevented, sealant is injected into the sealant groove, and therefore the battery pack is prevented from being damaged. The shell and the base are in a static state through the buckle and the clamping groove when glue in the glue groove is not dry, so that the shell and the base are tightly matched, and after the glue is dry, the shell and the base are adhered through the sealant in the glue groove, the sealing performance between the base and the shell is improved, and the water inflow phenomenon during outdoor use is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of power-assisted bicycle, concretely to a power-assisted bicycle battery box. BACKGROUND

[0002] The power-assisted bicycle battery box is an important component of the power-assisted bicycle, used for accommodating and protecting the battery, ensuring that the battery can stably and safely provide power for the power-assisted system during riding; currently, the battery box is usually installed outside the frame tube of the bicycle, facilitating the rider to carry and replace the battery, and the battery box is fixed on the bicycle through a lock seat to prevent theft or falling during riding.

[0003] For example, patent document application No. 201621094600.X discloses a vehicle-mounted lower tube side-pulling type battery box set, which includes a battery box and a controller for managing and controlling the battery core. The battery box has an upper box body, a lower cover, and a guide rail seat. The upper box body and the lower cover are combined to form a first accommodating cavity for accommodating the battery core. The guide rail seat can be locked and separated on the side of the lower cover away from the upper box body, and a second accommodating cavity is formed on the guide rail seat. The controller is positioned in the second accommodating cavity. Compared with the prior art, by setting the controller in the second accommodating cavity of the guide rail seat, the volume of the first accommodating cavity can be effectively reduced, the battery box set can be easily installed on the electric vehicle, and the manufacturing cost of the electric vehicle will not be increased. The controller is also well protected. In addition, since the controller together with the guide rail seat can be locked and separated on the side of the lower cover, it is not only easy to assemble and disassemble, but also avoids the risk of theft of the battery box set, and the safety is high.

[0004] However, the current battery box usually uses screws to install the shell and the base. The use of screws requires multiple holes to be opened on the shell, which can cause poor sealing effect. Since the battery box is used outdoors, there is no waterproof protection measure outside the battery box. If it rains heavily, the internal battery pack of the battery box will be damaged, affecting the service life of the battery pack. Therefore, we need to propose a power-assisted bicycle battery box to solve the above problems, which can effectively improve the sealing performance of the battery box and prolong the service life of the internal battery pack. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a power-assisted bicycle battery box, which can effectively improve the sealing performance of the battery box and prolong the service life of the internal battery pack to solve the problems in the background technology.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a power-assisted bicycle battery box, including detachable installation battery box body on the battery holder, the battery holder is fixed on the frame tube of power-assisted bicycle, the battery box body includes shell, base and the electric core of installation in the shell inside, the shell is buckled on the base, the electric core is wrapped with the insulating plastic support of integral board,

[0007] One end of the shell is provided with a lock shell, a lock cylinder is installed in the lock shell, the shell and the lock shell are integrally arranged, a waterproof and breathable pressure relief valve is arranged on one side of the lock cylinder, and a glue groove is arranged on the edge of the shell at the connecting position of the base for filling sealant.

[0008] The base is provided with buckles around the edge, one side of the buckle is provided with a guide strip, the shell is provided with a buckle slot for installing the buckle, and the shell is also provided with a guide groove corresponding to the guide strip

[0009] Preferably, the insulating plastic support includes a BMS board pad and a connecting piece located on both sides of the BMS board pad and in contact with the electric core, a plurality of sunken Y-shaped structures are arranged on the connecting piece and in contact with the electric core guide column, and the connecting piece is vertically fixed on both sides of the BMS board pad.

[0010] Preferably, one end of the connecting piece close to the BMS board pad is provided with a plurality of folded edges, and the edge of the BMS board pad is provided with a metal pad matched with the folded edge.

[0011] Preferably, a groove is arranged on the connecting piece for sinking the sunken piece, one end of the sunken piece is not in contact with the groove, and the other end of the sunken piece is integrally formed with the connecting piece at the edge of the groove.

[0012] Preferably, a lock seat is arranged on the base for installing the lock cylinder, and the lock seat is located at one end of the base.

[0013] Preferably, the base is slidably installed on the battery holder, and the other end of the base is provided with a discharge plug.

[0014] Preferably, a slot is arranged on the base for installing the battery holder, and the base is provided with a replacement opening at the end of the slot for replacing the discharge fuse.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] 1. The utility model discloses a buckle and the cooperation of card slot and the cooperation of guide strip and guide groove, fix the battery pack through guide strip, prevent the battery pack left and right swing, simultaneously, when the shell is installed, make the shell move according to the guide groove on the guide strip, prevent the front and back swing, hit into the sealant in the glue groove, when the glue in the glue groove has not dried, the shell and the base are in the stationary state through the cooperation of buckle and card slot, make it tight fit shell and base, after the glue is dry, the sealant in the glue groove sticks shell and base, increase the sealing property between base and shell, prevent the water inflow phenomenon when using outdoors, improve the service life of internal battery pack to a certain extent.

[0017] 2. The utility model discloses the setting of waterproof breathable pressure relief valve prevents the battery damage under the heat runaway condition, the battery box cavity produces high pressure for a short time, avoids the battery explosion that can be caused because of high pressure no effective structure and timely pressure relief.

[0018] 3. The utility model discloses a compact insulation plastic support that is formed by two connecting pieces and BMS board pads, which maximally adheres to the pole of the battery cell and improves the current and transmission efficiency. DRAWINGS

[0019] Figure 1 It is the structural schematic diagram of the utility model;

[0020] Figure 2 It is the base mounting structure schematic diagram of the utility model;

[0021] Figure 3 It is the section structure schematic diagram of the utility model;

[0022] Figure 4 It is the insulation plastic support mounting structure schematic diagram of the utility model;

[0023] Figure 5 It is the buckle and guide strip mounting structure schematic diagram of the utility model.

[0024] In the drawing: 1, shell; 2, battery seat; 3, lock cylinder; 4, waterproof breathable pressure relief valve; 5, insulation plastic support; 51, lower concave piece; 52, BMS board pad; 53, folded edge; 54, guide strip; 55, glue groove; 56, buckle; 57, connecting piece; 6, switch; 7, discharge plug; 8, base. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0026] Referring to Figures 1-5 The utility model provides a technical scheme: a power-assisted bicycle battery box, including detachable installation on the battery seat 2 battery box body, the battery seat 2 is fixed on the frame pipe of power-assisted bicycle, the battery box body includes the shell 1, base 8 and installs the electric core in the shell 1 inside, the shell 1 buckle box is on the base 8, the electric core outside is wrapped with the insulating plastic support 5 of integrated board type, the insulating plastic support 5 adopts the metal sheet of sinking type, Y type structure, can maximum degree tightly paste the electric core pole, utilize the design of close adhesion to reduce contact resistance, if not sinking type, the metal connecting piece is plane type, because the electric core pole and plane type metal connecting piece exist certain gap in actual production process, cannot close adhesion, when plane type metal connecting piece is spot-welded to the electric core pole by spot-welding equipment, because of the gap, plane type metal connecting piece will forcibly concave, thereby causing the stress upwards, when this stress exceeds certain value, after the battery leaves factory, will appear certain probability to separate the metal connecting piece from the electric core pole, causes the phenomenon such as loose welding or false welding to cause quality problem, and this sinking type scheme solves the hidden danger above-mentioned from structure, thereby improves the transmission efficiency of electric current.

[0027] The insulating plastic support 5 includes BMS board pad 52 and connecting piece 57 located on both sides of BMS board pad 52 and in contact with the electric core, a plurality of sinking Y-shaped structures are arranged on the connecting piece 57 and in contact with the electric core guide column, the connecting piece 57 is vertically fixed on both side edges of the BMS board pad 52, and a compact insulating plastic support 5 is formed by the two connecting pieces 57 and the BMS board pad 52, so that the electric core pole is tightly attached to the maximum extent, and the current and transmission efficiency are improved.

[0028] A plurality of flanges 53 are arranged on one end of the connecting piece 57 close to the BMS board pad 52, metal pads matching the flanges 53 are arranged on the edges of the BMS board pad 52, and the conductive performance between the connecting piece 57 and the BMS board pad 52 is improved by cooperation of the flanges 53 and the metal pads.

[0029] Grooves are arranged on the connecting piece 57 for sinking of the concave piece 51, one end of the concave piece 51 is not in contact with the grooves, and the other end of the concave piece 51 is integrally formed with the connecting piece 57 at the edge of the grooves, so that the cross-sectional area of the concave piece 51 is not reduced, the contact area with the electric core pole is increased, and the signal transmission effect is improved.

[0030] The base 8 is provided with a lock seat for installing the lock cylinder 3, the lock seat is located at one end of the base 8, the base 8 is slidably installed on the battery seat 2, the other end of the base 8 is provided with a discharge plug 7, the lock cylinder comprises a lock bolt, the lock bolt can be lifted in the lock seat, the lock bolt protrudes from the bottom of the base, the lock bolt is provided with a self-locking guide surface, the battery seat is provided with a locking groove, when the base is slidably installed on the battery seat, the self-locking guide surface is pressed by the battery seat, the lock bolt is lifted by the pushing force, when the lock bolt is aligned with the locking groove, the lock bolt is inserted into the locking groove.

[0031] One end of the shell 1 is provided with a lock shell, the lock cylinder 3 is installed in the inside of the lock shell, the shell 1 and the lock shell are integrally arranged, the waterproof and breathable pressure relief valve 4 is arranged at one side of the lock cylinder 3, the edge of the base 8 at the connection of the shell 1 is provided with a glue groove 55 for installing sealant, the waterproof and breathable pressure relief valve 4 is increased, and the functions are two kinds: one is the waterproof and breathable function, the pressure in the sealed battery box is kept consistent with the atmospheric pressure, and the other is that when the battery is in thermal runaway, internal instantaneous pressure can be relieved through the waterproof and breathable pressure relief valve 4, so that the battery is prevented from exploding due to excessive pressure.

[0032] The edge of the base 8 is provided with buckles 56, one side of the buckle 56 is provided with guide strips 54, the shell 1 is provided with buckle grooves for installing the buckles 56, and the shell 1 is also provided with guide grooves corresponding to the guide strips 54, the connection firmness between the base 8 and the shell 1 is increased, the battery pack is fixed through the cooperation of the buckles 56 and the buckle grooves and the cooperation of the guide strips 54 and the guide grooves, the battery pack is prevented from shaking left and right, meanwhile, when the shell 1 is installed, the shell 1 moves according to the guide grooves on the guide strips 54, the shell 1 is prevented from shaking forward and backward, the sealant is injected into the glue groove 55, the shell 1 and the base 8 are in a static state when the glue in the glue groove 55 is not dry, so that the shell 1 and the base 8 are tightly matched, after the glue is dry, the sealant in the glue groove 55 adheres the shell 1 and the base 8, the sealing property between the base 8 and the shell 1 is increased, and the water inflow phenomenon is prevented when the battery box is used outdoors, and the service life of the internal battery pack is improved to a certain extent.

[0033] The base 8 is provided with a slot for installing the battery seat 2, the battery seat 2 is provided with a charging and discharging switch 6, the base 8 is provided with a replacement opening (not shown in the figure) for replacing a discharge fuse at the end of the slot, and the discharge end fuse replacement opening is increased, like the function of the charging end fuse replacement opening, under the premise that the shell is not removed, the fuse can be replaced through the replacement opening.

[0034] The utility model discloses a kind of power-assisted bicycle battery boxes, including detachably installed on battery seat 2 battery box body, the battery seat 2 is then fixed on the frame tube of power-assisted bicycle. Battery box body is composed of shell 1, base 8 and battery pack placed in the inside of shell 1.

[0035] In the structural design, the utility model utilizes the close engagement of buckle 56 and clamping groove, the accurate embedding of guide strip 54 and guide groove, and the lock shell integrally designed with one end of the shell 1, realizes multiple functions. On the one hand, the guide strip 54 can play a limiting role on the battery pack in the shell 1, effectively prevent the battery pack from shaking left and right in the shell 1, ensure the stability of the battery pack. Second, through the cooperation of the guide groove on the guide strip 54 and the shell 1, the shell 1 and the base 8 can be accurately matched, which provides protection for the stability of the overall structure. Third, the shell 1 is provided with a lock shell integrally designed with one end thereof, which effectively avoids the problem of poor waterproof performance caused by the gap between the lock core 3 and the shell 1 in the traditional split design, greatly improves the overall waterproof effect.

[0036] When assembling, sealant is injected into the glue groove 55 of the base 8. While the sealant has not yet solidified, the shell 1 and the base 8 are accurately assembled by using the cooperation structure of buckle 56 and clamping groove, realizing the tight fit of the two. After the sealant is completely solidified, the strong adhesive force will firmly connect the shell 1 and the base 8, greatly enhancing the stability and sealing property between the two.

[0037] This process design effectively prevents the intrusion of external moisture when the product is used in complex outdoor environments, ensuring the stable operation of the internal electronic components and other structures.

[0038] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An electric bicycle battery box, comprising a battery box body detachably mounted on a battery seat (2) fixed to a frame tube of an electric bicycle, characterized in that: The battery box body comprises a shell (1), a base (8) and a battery core installed inside the shell (1), the shell (1) is buckled on the base (8), and the battery core is wrapped outside by an integrated plate type insulating plastic support (5); One end of the shell (1) is provided with a lock shell, a lock cylinder (3) is installed inside the lock shell, the shell (1) and the lock shell are integrally arranged, a waterproof and breathable pressure relief valve (4) is arranged on one side of the lock cylinder (3), and a glue groove (55) for filling sealant is arranged on the edge of the base (8) at the connection of the shell (1). The base (8) is provided with a buckle (56) around the edge, one side of the buckle (56) is provided with a guide bar (54), the shell (1) is provided with a buckle groove for installing the buckle (56), and the shell (1) is also provided with a guide groove corresponding to the guide bar (54).

2. A battery box for a power assisted cycle according to claim 1, characterised in that: The insulating plastic support (5) comprises a BMS board pad (52) and a connecting piece (57) located on both sides of the BMS board pad (52) and abutting against the battery core, a plurality of sunken Y-shaped structures are arranged on the connecting piece (57) and abut against the lower recessed piece (51) of the battery core guide column, and the connecting piece (57) is vertically fixed on both sides of the BMS board pad (52).

3. An electrically assisted bicycle battery pack according to claim 2, characterised in that: One end of the connecting piece (57) close to the BMS board pad (52) is provided with a plurality of folded edges (53), and the edge of the BMS board pad (52) is provided with a metal pad matched with the folded edge (53).

4. An electrically assisted bicycle battery pack according to claim 3, characterised in that: The connecting piece (57) is provided with a groove for sinking the lower recessed piece (51), one end of the lower recessed piece (51) is not in contact with the groove, and the other end of the lower recessed piece (51) is integrally formed with the connecting piece (57) at the edge of the groove.

5. An electrically assisted bicycle battery pack according to claim 4, characterised in that: The base (8) is provided with a lock seat for installing the lock cylinder (3), and the lock seat is located at one end of the base (8).

6. An electrically assisted bicycle battery pack according to claim 5, wherein: The base (8) is slidably installed on the battery seat (2), and the other end of the base (8) is provided with a discharge plug (7).

7. An electrically assisted bicycle battery pack according to claim 6, characterised in that: The base (8) is provided with a slot for installing the battery seat (2), and the base (8) is provided with a replacement opening for replacing the discharge fuse at the end of the slot.

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