Battery locking device and electric power-assisted bicycle

Abstract

The utility model belongs to the technical field of electric vehicles, and discloses a battery locking device and an electric power-assisted bicycle. The battery locking device comprises a mounting seat, a locking seat, a battery and a locking mechanism, the mounting seat and the locking seat are fixedly connected to a frame respectively; one end of the battery is connected to the mounting seat, and the other end of the battery is connected to the locking seat; the locking mechanism comprises a spring bolt and a locking assembly, the spring bolt can be telescopically connected to the locking base in the axial direction of the spring bolt so as to move towards or away from the battery, the locking assembly is arranged at the end, connected with the locking base, of the battery, the locking assembly has a locking state and an anti-falling state, and in the locking state, the spring bolt stretches out and can be connected with the locking assembly in a locking mode; in the anti-falling state, the spring bolt shrinks and can be connected with the locking assembly in a limiting mode. The structure is simplified, the volume occupancy rate is reduced, the manufacturing cost is reduced, and the reliability of battery disassembly and assembly is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric vehicle technical field especially, it relates to a battery locking device and electric power-assisted bicycle. BACKGROUND

[0002] Electric power-assisted bicycle refers to the auxiliary power with electric drive, but still mainly driven by human power, which is different from the electric car relying on electricity alone, and also different from the bicycle relying on human power alone. In the process of riding, only the rider pedals actively, the power-assisted bicycle will provide additional auxiliary power to the bicycle through the motor drive system, thereby reducing the pedal pressure of the rider and making the riding more relaxed and labor-saving.

[0003] At present, the battery of the electric power-assisted bicycle is usually installed in a detachable manner, and an installation cavity is formed on the frame to enable the battery assembly to be installed inside the frame; wherein the battery assembly is composed of an upper battery seat, a battery and a lower battery seat, the upper battery seat and the lower battery seat are respectively fixed in the frame by screwing or other fixed connection methods, and the battery is installed and fixed in the frame by the upper battery seat and the lower battery seat to supply power to the whole vehicle and realize detachability. Generally, the opening of the installation cavity faces the ground, and due to the detachable installation of the battery, not only a locking mechanism is provided for the battery, but also a retaining mechanism is provided to prevent the battery from falling after the locking mechanism is unlocked, and the retaining mechanism needs to be manually released to realize the disassembly of the battery. However, the existing retaining mechanism is usually provided separately outside the locking mechanism, which increases the occupied space of parts, has a complex structure and increases the cost.

[0004] Therefore, there is an urgent need for a battery locking device and an electric power-assisted bicycle to solve the above technical problems. INVENTION CONTENTS

[0005] One purpose of the utility model is to provide a battery locking device which can integrate the locking structure and the anti-falling structure of the battery on the same lock tongue, simplify the structure of parts, reduce the cost and improve the reliability of battery disassembly.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The battery locking device is arranged in the frame, and the battery locking device comprises:

[0008] The mounting seat and the locking seat are respectively fixedly connected to the frame;

[0009] The battery is connected to one end of the mounting seat and the other end of the locking seat;

[0010] The locking mechanism comprises a lock tongue and a locking assembly, the lock tongue is connected to the locking seat in the axial direction, and the locking assembly is arranged at one end of the locking seat connected to the battery, the locking mechanism has a locking state and a drop-proof state;

[0011] In the locking state, the lock tongue is extended and locked with the locking assembly;

[0012] In the drop-proof state, the lock tongue is retracted and limited with the locking assembly.

[0013] Optionally, the locking mechanism further comprises a fully unlocked state, the locking assembly comprises a limiting spring and a locking piece,

[0014] In the locking state, the lock tongue is extended and locked with the locking piece;

[0015] In the drop-proof state, the lock tongue is retracted and limited with the limiting spring;

[0016] In the fully unlocked state, the lock tongue is separated from the locking piece and the limiting spring.

[0017] Optionally, the locking piece is arranged at one end of the locking seat connected to the battery, and the locking piece is provided with a locking hole,

[0018] In the locking state, the lock tongue can be extended and clamped with the locking hole.

[0019] Optionally, one end of the limiting spring is fixedly connected to one end of the locking seat connected to the battery, and the other end is movably arranged, and the limiting spring is provided with a protruding portion,

[0020] In the drop-proof state, the lock tongue can be retracted and separated from the locking piece and clamped with the protruding portion.

[0021] Optionally, the other end of the limiting spring is provided with a pressing portion, and the pressing portion is arranged in a spaced manner with the top of the battery,

[0022] In the fully unlocked state, the pressing portion can be pressed to separate the lock tongue and the protruding portion.

[0023] Optionally, a first elastic piece is arranged between the limiting spring and the end wall of the locking seat connected to the battery, so as to reset the limiting spring.

[0024] Optionally, the locking mechanism further comprises an ejection spring, one end of the ejection spring is fixedly connected to one end of the locking seat, and the other end of the ejection spring is elastically abutted to the side wall of the battery,

[0025] In the locking state, the other end of the ejection spring is elastically abutted between the side wall of the battery and the frame;

[0026] In the anti-falling state, the lock tongue is retracted and separated from the locking component, and the ejection spring can push the battery to rotate and separate from the mounting seat until the lock tongue is limitedly connected with the limiting spring.

[0027] Optionally, a second elastic component is arranged between the lock tongue and the end wall of the battery, so as to elastically connect the lock tongue and the locking seat.

[0028] Optionally, the locking mechanism further comprises a driving assembly, and the driving assembly comprises a lock cylinder, a driving shaft and a transmission rod;

[0029] The output end of the lock cylinder is eccentrically connected to the driving shaft, one end of the transmission rod is hingedly connected to the locking seat, the other end of the transmission rod is fixedly connected to the lock tongue, and the transmission rod is movably connected to the driving shaft,

[0030] The lock cylinder can be rotated to drive the driving shaft to rotate, so that the other end of the transmission rod moves away from or towards the locking seat, so that the lock tongue is retracted or extended.

[0031] Another purpose of the utility model is to provide an electric power-assisted bicycle, which can integrate the locking structure and the anti-falling structure of the battery into the same lock tongue, simplify the structure of parts and reduce the cost.

[0032] To achieve the purpose, the utility model adopts the following technical scheme:

[0033] The electric power-assisted bicycle comprises a frame and the battery locking device, the frame is provided with a mounting cavity, and the battery locking device is arranged in the mounting cavity.

[0034] The utility model has the advantages of:

[0035] The utility model provides a battery locking device and electric power-assisted bicycle, when the battery is disassembled, the lock tongue and the locking assembly are locked and connected, and the lock tongue and the locking assembly are limitedly connected after being separated from the locking connection, so that the locking mechanism has a locking state and an anti-falling state, thereby realizing the locking connection and the anti-falling connection between the battery and the frame respectively, and the lock tongue and the locking assembly are completely separated from the connection, so that the locking mechanism is completely unlocked, thereby realizing the complete unlocking between the battery and the frame, the battery locking device can be quickly disassembled on the frame and has the anti-falling function. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is the isometric view of the battery locking device provided by the embodiment of the utility model;

[0037] Figure 2 is the partial enlarged sectional view of the battery locking device in the locking state provided by the embodiment of the utility model;

[0038] Figure 3 is the partial enlarged sectional view of the battery locking device in the anti-falling state provided by the embodiment of the utility model;

[0039] Figure 4 is the partial enlarged sectional view of the battery locking device in the complete unlocking state provided by the embodiment of the utility model;

[0040] Figure 5 is the partial enlarged view of the battery provided by the embodiment of the utility model;

[0041] Figure 6 is the isometric view of the locking seat provided by the embodiment of the utility model;

[0042] Figure 7 is the partial enlarged view of the battery locking device provided by the embodiment of the utility model.

[0043] In the drawings:

[0044] 10, mounting seat; 20, locking seat;

[0045] 30, battery; 31, battery body; 32, battery top seat; 33, battery bottom seat;

[0046] 41, lock tongue; 411, second guide inclined surface; 42, locking assembly; 421, limiting elastic sheet; 4211, protruding part; 42111, first guide inclined surface; 4212, pressing part; 422, locking piece; 4221, locking hole; 43, first elastic piece; 44, second elastic piece; 45, ejection elastic sheet; 46, driving assembly; 461, lock cylinder; 462, driving shaft; 463, transmission rod. EMBODIMENT

[0047] The utility model will be further explained in detail below in combination with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0048] In the description of the utility model, unless another definite provision and limitation, the term "link", "connection", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be direct connection, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two elements of the interaction relationship.For the ordinary skilled in the art, the above-mentioned terms can be understood according to the specific meaning of the utility model.

[0049] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional features between them.Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0050] In the description of the embodiment, the terms "on", "under", "left", "right", etc. Orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of description and simplification operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0051] The following refers to Figures 1 to 7 The utility model provides a battery locking device and electric power-assisted bicycle.

[0052] The embodiment provides a battery locking device, which is arranged in the frame to lock the battery 30, so that the battery 30 can realize the electric power-assisted bicycle after being locked by the battery locking device.

[0053] Please refer to Figure 1 , specifically, the battery locking device includes a mounting seat 10, a locking seat 20, a battery 30 and a locking mechanism.The mounting seat 10 and the locking seat 20 are fixedly connected to the frame, one end of the battery 30 is connected to the mounting seat 10, the other end of the battery 30 is connected to the locking seat 20;The locking mechanism is used for realizing that the battery 30 is locked and mounted between the mounting seat 10 and the locking seat 20;Please refer to Figure 2 、 Figure 3 、 Figure 4 And Figure 5The locking mechanism includes a locking tongue 41 and a locking assembly 42. The locking tongue 41 is connected to the locking seat 20 in an axial direction and is movable towards or away from the battery 30. The locking assembly 42 is arranged at one end of the battery 30 connected to the locking seat 20. The locking assembly 42 has a locking state and a drop-preventing state. In the locking state, the locking tongue 41 is extended and can be locked with the locking assembly 42. In the drop-preventing state, the locking tongue 41 is retracted and can be limited with the locking assembly 42.

[0054] The battery locking device in the embodiment can realize the locking state and the drop-preventing state of the locking mechanism by the locking connection and the limited connection between the locking tongue 41 and the locking assembly 42 when the battery 30 is disassembled. Thus, the locking connection and the drop-preventing connection between the battery 30 and the frame are realized, respectively. The locking mechanism is completely unlocked by completely separating the locking tongue 41 from the locking assembly 42. Thus, the battery 30 and the frame are completely unlocked. The battery locking device can be quickly disassembled from the frame and has the drop-preventing function. The locking and the drop-preventing of the battery 30 are realized by only one locking tongue 41. The structure is greatly simplified, the volume occupancy is reduced, the manufacturing cost is lowered, and the reliability of the disassembly of the battery 30 is improved.

[0055] Specifically, one end of the battery 30 is rotatably connected to the mounting seat 10, and the other end is locked, drop-prevented, or completely unlocked with the locking seat 20 by the locking mechanism. The rotatable connection between the battery 30 and the mounting seat 10 can realize the detachable installation between the battery 30 and the frame. The locking, the drop-preventing, or the complete unlocking between the other end of the battery 30 and the locking seat 20 after the installation can realize the locking, the drop-preventing, or the complete unlocking of the battery 30 by the locking mechanism.

[0056] Specifically, in the embodiment, the mounting seat 10 and the locking seat 20 are arranged at the bottom and the top of the mounting cavity of the frame, respectively. The bottom is used for the limited rotation of the battery 30, and the top is used for the locking and unlocking of the battery 30.

[0057] Alternatively, the mounting seat 10 can be directly fixedly connected to the bottom of the mounting cavity of the frame or fixedly connected to the bottom of the mounting cavity of the frame through a mounting bracket, which is not limited here.

[0058] It can be understood that the specific structure of the rotation and disassembly between the mounting seat 10 and the battery 30, the specific structure of the fixing structure between the mounting seat 10 and the bottom of the mounting cavity of the frame, and the specific structure of the electrical connection between the battery locking device and the electrically assisted bicycle can all adopt the structures commonly used in the art, which are not described here in the embodiment.

[0059] More specifically, the battery 30 comprises a battery body 31, a battery top seat 32 and a battery bottom seat 33, the battery top seat 32 and the battery bottom seat 33 are respectively arranged at the top and the bottom of the battery body 31, the battery bottom seat 33 is used for being connected with the mounting seat 10, and the battery top seat 32 is used for being connected with the locking seat 20, and the limiting spring 421 is arranged on the battery top seat 32.

[0060] Please refer to Figure 2 and Figure 5 In the embodiment, the locking mechanism further comprises a completely unlocked state, the locking assembly 42 comprises the limiting spring 421 and the locking piece 422, in the locked state, the lock tongue 41 is extended and locked with the locking piece 422, in the anti-falling state, the lock tongue 41 is retracted and limited with the limiting spring 421, and in the completely unlocked state, the lock tongue 41 is separated from the locking piece 422 and the limiting spring 421, that is, the lock tongue 41 and the locking assembly 42 can be locked, limited and completely separated.

[0061] It can be understood that the lock tongue 41, the locking piece 422 and the limiting spring 421 are all made of metal materials, so that the reliability of the limiting connection between the lock tongue 41 and the limiting spring 421 and the reliability of the locking connection between the lock tongue 41 and the locking piece 422 are improved. Moreover, compared with the prior art, the limiting spring 421 is limited with the limiting structure of the plastic material arranged on the locking seat 20, which is more reliable and has a longer service life.

[0062] Specifically, the locking piece 422 is arranged at one end of the battery 30 connected with the locking seat 20, in the embodiment, the top of the battery 30, preferably, the locking piece 422 is arranged on the battery top seat 32, the locking piece 422 is provided with a locking hole 4221, in the locked state, the lock tongue 41 can be extended and clamped with the locking hole 4221, that is, the locking between the lock tongue 41 and the locking piece 422 is realized, so that the battery 30 is locked.

[0063] Please refer to Figure 3 and Figure 5 Further, one end of the limiting spring 421 is fixedly connected with one end of the battery 30 connected with the locking seat 20, in the embodiment, the top of the battery 30, preferably, the locking piece 422 is arranged on the battery top seat 32, and the other end is movably arranged, the limiting spring 421 is provided with a protruding portion 4211, in the anti-falling state, the lock tongue 41 can be retracted and separated from the locking piece 422 and clamped with the protruding portion 4211, that is, the anti-falling effect after the battery 30 is unlocked is realized, so that the battery 30 is prevented from falling and being damaged, and the reliability of the battery 30 during disassembly is improved.

[0064] It should be noted that one end and the other end of the limiting elastic sheet 421 are arranged in the order of the mounting direction of the battery 30, so that the movable end of the limiting elastic sheet 421 is close to the opening of the mounting cavity of the vehicle frame, thereby facilitating the operation of the operator.

[0065] Specifically, in the order of the mounting direction of the battery 30, the protruding portion 4211 and the locking piece 422 are sequentially arranged, that is, the protruding portion 4211 and the locking piece 422 are arranged in sequence from one end to the other end of the limiting elastic sheet 421, so that when the battery 30 is disassembled, after the locking piece 422 is unlocked, when the battery 30 rotates around the base, the protruding portion 4211 is engaged with the lock tongue 41 to achieve the effect of preventing falling.

[0066] Optionally, the protruding portion 4211 has a first guide slope 42111, which is arranged close to one end of the limiting elastic sheet 421, and the lock tongue 41 has a second guide slope 411, and when the battery 30 is mounted, the first guide slope 42111 can cooperate with the second guide slope 411 to guide the installation of the lock tongue 41. Specifically, when the battery 30 is mounted, the bottom of the battery 30 first contacts the mounting base 10 and rotates relative to the mounting base 10, so that the top of the battery 30 moves towards the mounting cavity until the battery 30 is completely mounted in the mounting cavity, and the lock tongue 41 and the locking piece 422 are locked. During this process, the first guide slope 42111 will contact the second guide slope 411 of the lock tongue 41, and the lock tongue 41 will slide along the first guide slope 42111 and continuously contract until it passes over the protruding portion 4211 and then resets.

[0067] Please refer to Figure 4 and Figure 5 Further, the other end of the limiting elastic sheet 421 is provided with a pressing portion 4212, which is arranged in space with the top of the battery 30. Specifically, the pressing portion 4212 is arranged in space with the battery top base 32, and in the completely unlocked state, the pressing portion 4212 can be pressed to make the lock tongue 41 and the protruding portion 4211 disengage. That is, the pressing portion 4212 is close to the opening of the mounting cavity, and in the free state of the limiting elastic sheet 421, there is a gap between the pressing portion 4212 and the top of the battery 30, and when complete unlocking is required, the pressing portion 4212 is pressed to move towards the top of the battery 30, so that the protruding portion 4211 moves towards the top of the battery 30, thereby achieving the disengagement of the lock tongue 41 and the protruding portion 4211, that is, the complete unlocking of the battery 30. And this operation needs to be operated by the user, thereby avoiding the problem of the battery 30 falling caused by automatic disengagement from the limiting state. Of course, in other embodiments, the lock tongue 41 can be further contracted to disengage the lock tongue 41 from the locking piece 422 and the limiting elastic sheet 421, which is within the protection scope of the present application.

[0068] Optionally, the limiting elastic sheet 421 and the pressing portion 4212 can be provided separately or integrally. In the embodiment, the limiting elastic sheet 421 and the pressing portion 4212 are integrally connected, so that the pressing portion 4212 directly drives the limiting elastic sheet 421, without the need of other connection structure.

[0069] Optionally, the limiting elastic sheet 421 and the end wall of the battery 30 connecting lock seat 20 are provided with a first elastic member 43, so as to reset the limiting elastic sheet 421, that is, to enable the first elastic member 43 to automatically reset the limiting elastic sheet 421 after the pressing portion 4212 is pressed and released, thereby facilitating the use of the user.

[0070] Please refer to Figure 3 , Figure 4 and Figure 6 , the locking mechanism further comprises an ejection elastic sheet 45, one end of the ejection elastic sheet 45 is fixedly connected to one end of the lock seat 20, the other end of the ejection elastic sheet 45 is elastically abutted against the side wall of the battery 30, in the locked state, the other end of the ejection elastic sheet 45 is elastically abutbed against the side wall of the battery 30 and the frame; in the anti-falling state, the lock tongue 41 is retracted and separated from the locking member 422, the ejection elastic sheet 45 can push the battery 30 to rotate and separate from the mounting seat 10 until the lock tongue 41 is limitedly connected with the limiting elastic sheet 421. By providing the ejection elastic sheet 45, when the lock seat 20 and the battery 30 are completely installed, the ejection elastic sheet 45 is compressed between the cavity wall of the mounting cavity and the battery 30, and has a certain elastic force, so that after the locked state is separated, the elastic force drives the battery 30 to rotate outwardly, to realize automatic ejection of the battery 30 when the battery 30 is disassembled, thereby facilitating the use of the user.

[0071] Specifically, the ejection elastic sheet 45 comprises a fixed portion and a connecting portion, the fixed portion and the connecting portion are arranged at an angle, the fixed portion is fixedly connected to the lock seat 20, and the connecting portion is movably arranged; when the lock seat 20 and the battery 30 are installed, the connecting portion is pressed and the angle between the connecting portion and the fixed portion changes, so that the connecting portion can abut between the battery 30 and the cavity wall of the mounting cavity, and after the battery 30 is separated from the locked state, the connecting portion and the fixed portion can drive the battery 30 to rotate due to the elastic resetting capacity therebetween, so that the angle between the connecting portion and the fixed portion is reset, thereby realizing automatic ejection of the battery 30 when the battery 30 is disassembled.

[0072] In order to facilitate the operation of the user, please refer to Figure 7In the embodiment, the locking mechanism further comprises a driving assembly 46, which comprises a lock cylinder 461, a driving shaft 462 and a transmission rod 463; the output end of the lock cylinder 461 is eccentrically connected to the driving shaft 462, one end of the transmission rod 463 is hingedly connected to the locking seat 20, the other end is fixedly connected to the lock bolt 41, the transmission rod 463 is movably connected to the driving shaft 462, the lock cylinder 461 can rotate and drive the driving shaft 462 to rotate, so as to drive the other end of the transmission rod 463 to move away from or towards the locking seat 20, so as to retract or extend the lock bolt 41. That is, the user can control the rotation of the lock cylinder 461 by inserting a key or the like, thereby driving the transmission rod 463 to rotate, so as to drive the lock bolt 41 to retract or extend, and the user can more conveniently control the locking and unlocking of the battery 30.

[0073] Please refer to Figures 2 to 4 Further, the second elastic member 44 is arranged between the lock bolt 41 and the end wall of the battery 30 towards the locking seat 20, so as to elastically connect the lock bolt 41 and the locking seat 20. In this way, when the battery 30 is installed, the second elastic member 44 can automatically reset the lock bolt 41 after the lock bolt 41 passes the protruding portion 4211, so as to more conveniently realize the automatic locking of the battery 30 during installation, thereby making the installation of the battery 30 more convenient.

[0074] The embodiment further provides an electrically assisted bicycle, which comprises a frame and the battery locking device according to any one of the above-mentioned schemes, and the frame is provided with a mounting cavity, and the battery locking device is arranged in the mounting cavity. By arranging the battery locking device, the convenience and reliability of the installation of the battery 30 are improved, and the functions of locking, unlocking, preventing falling and the like are considered, and the structure is simple and the volume utilization rate is high.

[0075] Obviously, the above-mentioned embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation on the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, it is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made in the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A battery locking device, characterized by The battery locking device is arranged in the frame and comprises: a mounting seat (10) and a locking seat (20) fixedly connected to the frame respectively; a battery (30) connected to the mounting seat (10) at one end and to the locking seat (20) at the other end; a locking mechanism comprising a lock tongue (41) and a locking assembly (42), the lock tongue (41) being connected to the locking seat (20) in an axial direction and moving towards or away from the battery (30), the locking assembly (42) being arranged at one end of the battery (30) connected to the locking seat (20), the locking mechanism having a locking state and a drop-proof state; in the locking state, the lock tongue (41) is extended and locked with the locking assembly (42); in the drop-proof state, the lock tongue (41) is retracted and limited with the locking assembly (42).

2. The battery lockout device of claim 1, wherein, The locking mechanism further comprises a fully unlocked state, the locking assembly (42) comprising a limiting spring (421) and a locking piece (422), in the locking state, the lock tongue (41) is extended and locked with the locking piece (422); in the drop-proof state, the lock tongue (41) is retracted and limited with the limiting spring (421); in the fully unlocked state, the lock tongue (41) is separated from the locking piece (422) and the limiting spring (421).

3. The battery lockout device of claim 2, wherein, The locking piece (422) is arranged at one end of the battery (30) connected to the locking seat (20), and the locking piece (422) is provided with a locking hole (4221), in the locking state, the lock tongue (41) can be extended and clamped with the locking hole (4221).

4. The battery lockout device of claim 3, wherein, One end of the limiting spring (421) is fixedly connected to one end of the battery (30) connected to the locking seat (20), and the other end is movably arranged, and the limiting spring (421) is provided with a protruding portion (4211), in the drop-proof state, the lock tongue (41) can be retracted and separated from the locking piece (422) and clamped with the protruding portion (4211).

5. The battery lockout device of claim 4, wherein, The other end of the limiting spring (421) is provided with a pressing portion (4212), and the pressing portion (4212) is arranged in space with the top of the battery (30), in the fully unlocked state, the pressing portion (4212) can be pressed to separate the lock tongue (41) and the protruding portion (4211).

6. The battery lockout device of claim 5, wherein, A first elastic piece (43) is arranged between the limiting spring (421) and the end wall of the battery (30) connected to the locking seat (20) to facilitate the resetting of the limiting spring (421).

7. The battery lockout device of claim 2, wherein, The locking mechanism further comprises an ejection spring (45), one end of the ejection spring (45) is fixedly connected to one end of the locking seat (20), and the other end of the ejection spring (45) is elastically abutted to the side wall of the battery (30), in the locking state, the other end of the ejection spring (45) is elastically abutted between the side wall of the battery (30) and the frame. In the anti-falling state, the lock tongue (41) is retracted and disengaged from the locking piece (422), the ejecting spring (45) can push the battery (30) to rotate and separate around the mounting base (10) until the lock tongue (41) is limitedly connected with the limiting spring (421).

8. The battery lockout device of claim 1, wherein, The lock tongue (41) and the locking seat (20) are provided with a second elastic member (44) between the end wall of the battery (30), so that the lock tongue (41) and the locking seat (20) are elastically connected.

9. The battery lockout device of any one of claims 1-8, wherein, The locking mechanism further comprises a driving assembly (46), the driving assembly (46) comprises a lock cylinder (461), a driving shaft (462) and a transmission rod (463); The output end of the lock cylinder (461) is eccentrically connected to the driving shaft (462), one end of the transmission rod (463) is hingedly connected to the locking seat (20), the other end is fixedly connected with the lock tongue (41), and the transmission rod (463) is movably connected to the driving shaft (462), The lock cylinder (461) can rotate and drive the driving shaft (462) to rotate, so as to drive the other end of the transmission rod (463) to move away from or towards the locking seat (20), so that the lock tongue (41) is retracted or extended.

10. Electrically assisted bicycle, characterized in that The battery locking device comprises a frame and a battery locking device as claimed in any one of claims 1-9, the frame is provided with a mounting cavity, and the battery locking device is arranged in the mounting cavity.

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