Battery holder, battery assembly and electric bicycle

Abstract

The utility model belongs to the technical field of electric bicycles, and discloses a battery holder, a battery assembly and an electric bicycle. The battery holder is used for fixing a battery, a connector is arranged at one end of the battery, a first connector is arranged on the connector, and the battery holder comprises a battery holder body, a second connector and an elastic piece. A limiting mounting part matched with the connector is arranged on the battery holder body, and a mounting hole is formed in the limiting mounting part; the second connector is assembled on the battery holder body in a sliding manner, at least part of the second connector is arranged in the mounting hole in a sliding manner, and the second connector is connected with the first connector; the elastic piece is arranged in the battery holder body and is configured to apply pressure to the second connector all the time, so that the second connector can be tightly attached to the first connector all the time. The second connector on the battery holder can be tightly attached to the first connector on the battery all the time, the working reliability is high, and the service life is long.

Description

Technical Field

[0001] The utility model relates to the technical field of electric bicycles, in particular to a battery seat, a battery assembly and an electric bicycle. Background Art

[0002] An electric bicycle includes a motor for driving a tire to rotate and a battery for supplying power required for the operation of the motor. The battery is generally installed inside a frame in the form of a battery assembly. The battery assembly is composed of an upper battery seat, a battery body and a lower battery seat. The upper battery seat and the lower battery seat are generally fixed inside the frame by means of bolt connection, and the battery body is fixed between the upper battery seat and the lower battery seat. However, due to the manufacturing tolerances of the battery assembly and the vibration during riding, the connection contacts between the connector plug on the battery body and the connector socket on the lower battery seat will rub against each other. After long-term rubbing, abrasive particles or deformation will be generated, increasing the impedance value of the connection contacts and causing poor contact or functional failure.

[0003] Based on the above problems, some electric bicycles are provided with a force-applying component between the lower battery seat and the frame, and the lower battery seat is set as a movable component. By applying a force along the length direction of the battery body to the lower battery seat through the force-applying component, the close fit between the lower battery seat and the battery body can be maintained, and the connection contacts can be prevented from rubbing against each other. However, during the vibration of the battery, the force-applying component needs to bear all the forces from the battery body. When the force is too large, it is easy to cause fatigue failure or aging of the force-applying component, resulting in difficulty for the lower battery seat to maintain a close fit with the battery body, seriously affecting the working reliability and service life of the force-applying component.

[0004] Therefore, there is an urgent need to provide a battery seat, a battery assembly and an electric bicycle to solve the above technical problems. Summary of the Utility Model

[0005] According to one aspect of the utility model, the utility model provides a battery seat. The second connector on the battery seat can always maintain a close fit with the first connector on the battery through an elastic member. During the relative movement of the battery and the battery seat, the battery seat and the battery can limit each other to limit the deformation amount of the elastic member, improving the working reliability of the elastic member and extending the service life of the elastic member.

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

[0007] A battery seat for fixing a battery. One end of the battery is provided with a connection head, and a first connector is arranged on the connection head. The battery seat includes:

[0008] A battery seat body, on which a limiting installation part matching with the connection head is arranged, and an installation hole is arranged on the limiting installation part;

[0009] A second connector is slidably assembled to the battery holder body, at least a part of the second connector is slidably disposed in the mounting hole, and the second connector is connected to the first connector;

[0010] An elastic member is disposed on the battery holder body, and the elastic member is configured to always apply a pressure to the second connector so that the second connector can always be in close contact with the first connector.

[0011] Optionally, a connection hole is provided on one of the first connector and the second connector, and a connection rib is provided on the other one, and the connection rib is inserted into the connection hole.

[0012] Optionally, the second connector includes a connecting portion and a limiting portion connected to each other. The connecting portion is slidably disposed in the mounting hole, and the limiting portion can abut against the limiting mounting portion to limit the sliding distance of the connecting portion.

[0013] Optionally, on the limiting mounting portion, a sealing member is annularly provided at the outer edge of the mounting hole, and the sealing member can be attached to the connector head.

[0014] Optionally, the elastic member includes a force-applying section having an elastic deformation ability and connecting sections provided at both ends of the force-applying section. The connecting sections are connected to the battery holder body, and a first card slot is provided at the bottom of the second connector for clamping with the force-applying section.

[0015] Optionally, a mounting groove opposite to the mounting hole is provided on the battery holder body. The second connector includes a connecting portion and a limiting portion connected to each other. The connecting portion is slidably disposed in the mounting hole and is used for connecting to the first connector. The limiting portion is slidably mounted in the mounting groove. The elastic member is disposed in the mounting groove, one end of the elastic member abuts against the bottom wall of the mounting groove, and the other end abuts against the bottom of the limiting portion.

[0016] Optionally, the battery holder body further includes a supporting plate. A retaining edge surrounding the mounting hole is provided inside the limiting mounting portion. The retaining edge is detachably connected to the supporting plate and encloses to form the mounting groove.

[0017] Optionally, along the circumferential direction of the retaining edge, a plurality of clamping protrusions are provided on the outer peripheral wall of the retaining edge. A plurality of elastic buckles are provided on the supporting plate. The elastic buckles are arranged in one-to-one correspondence with the clamping protrusions, and the elastic buckles are clamped to the corresponding clamping protrusions.

[0018] Optionally, the elastic member is a spring, a rubber pad or a wave washer.

[0019] According to another aspect of the present utility model, the present utility model further provides a battery assembly, including a battery, a first battery holder, and a second battery holder. Two ends of the battery are respectively connected to the first battery holder and the second battery holder; wherein, the first battery holder is the battery holder described in any of the above technical solutions.

[0020] According to still another aspect of the present utility model, the present utility model further provides an electric bicycle, including a frame and the above battery assembly. A receiving cavity is provided on the frame, and the first battery holder and the second battery holder of the battery assembly are respectively installed at opposite ends of the receiving cavity.

[0021] Advantageous effects of the present utility model:

[0022] The present utility model provides a battery holder, including a battery holder body, a second connector, and an elastic member. After the battery is installed on the battery holder through a connector head, the elastic member will be compressed. The compressed elastic member will apply a thrust to the second connector under the action of the elastic restoring force, so that it closely adheres to the first connector, improving the connection reliability between the second connector and the first connector.

[0023] When the battery holder and the battery are separated due to vibration, the elastic member will elongate under the action of the elastic restoring force to ensure that the second connector always closely adheres to the first connector, avoiding friction caused by relative movement between the second connector and the first connector. This not only improves the reliability of the electrical connection between the second connector and the first connector, but also avoids wear of the connection contacts between the second connector and the first connector, extending the service life of the second connector and the first connector. When the battery moves from a position separated from the battery holder to the battery holder due to vibration or other reasons, the elastic member will be compressed to produce elastic deformation. If the vibration force is too large, the connector head will press against the limit installation part of the battery holder, and the movement of the battery will be limited by the limit installation part, avoiding excessive deformation of the elastic member caused by further movement of the battery. That is, the limit installation part shares a part of the force from the battery for the elastic member, making the elastic member not easily undergo fatigue failure, thereby improving the reliability of the electrical connection between the battery holder and the battery and extending the service life of the battery holder.

[0024] The present utility model further provides a battery assembly, including a battery, a first battery holder, and a second battery holder. Among them, the first battery holder is the above battery holder. Since the above battery holder is adopted in this battery assembly, the power supply reliability is relatively good and the service life is relatively long.

[0025] The present utility model further provides an electric bicycle, including a frame and the above battery assembly. Since the above battery assembly is adopted in this electric bicycle, the risk of power interruption during riding is relatively low, and the failure rate of the battery assembly is also relatively low. Description of the Drawings

[0026] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to the content of the embodiments of the present utility model and these drawings.

[0027] Figure 1 is a partial schematic view of the battery provided in the first embodiment of the present utility model;

[0028] Figure 2 is a schematic structural view of the battery holder provided in the first embodiment of the present utility model;

[0029] Figure 3 is an assembly drawing of the bracket, the second connector and the elastic member provided in the first embodiment of the present utility model;

[0030] Figure 4 is a schematic structural view of the second connector from one perspective provided in the first embodiment of the present utility model;

[0031] Figure 5 is a schematic structural view of the second connector from another perspective provided in the first embodiment of the present utility model;

[0032] Figure 6 is an assembly drawing of the bracket and the elastic member provided in the first embodiment of the present utility model;

[0033] Figure 7 is a schematic structural view of the battery holder provided in the second embodiment of the present utility model;

[0034] Figure 8 is Figure 7 a schematic view after hiding the second connector;

[0035] Figure 9 is an exploded schematic view of the fixing plate, the supporting plate and the elastic member provided in the second embodiment of the present utility model;

[0036] Figure 10 is an exploded schematic view of the battery assembly provided in the third embodiment of the present utility model.

[0037] In the figure:

[0038] 10. Battery; 20. Connector; 21. First connector; 211. Panel; 212. Jack; 213. Connection hole; 22. Second card slot; 23. Third card slot; 30. First battery holder; 40. Second battery holder; 50. Frame; 51. Accommodation cavity;

[0039] 100. Battery seat body; 110. Limit mounting part; 111. Mounting hole; 112. Baffle; 1121. Clamping protrusion; 120. Bracket; 130. First engaging part; 140. Second engaging part; 150. Mounting groove; 160. Support plate; 161. Elastic buckle;

[0040] 200. Second connector; 201. Connection part; 202. Limit part; 210. Contact surface; 220. Conductive sheet; 230. Connecting rib; 240. First card slot;

[0041] 300. Elastic member; 310. Force - applying section; 320. Connection section;

[0042] 400. Sealing member. Detailed implementation mode

[0043] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0044] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in the present utility model can be understood according to specific situations.

[0045] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above the", and "on the" second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "below the", and "under the" second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is at a lower horizontal height than the second feature.

[0046] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", and "right" are based on the orientation or positional relationships shown in the drawings. These are only for convenience of description and simplifying operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0047] Embodiment 1

[0048] This embodiment provides a battery holder. The second connector on the battery holder can always maintain close contact with the first connector on the battery. During the movement of the battery relative to the battery holder, the battery holder and the battery can limit each other to restrict the deformation amount of the elastic member, improving the reliability of the elastic member's operation and extending the service life of the elastic member.

[0049] This battery holder is for battery 10, as Figure 1 shown. One end of battery 10 is provided with a connector head 20, and a first connector 21 is provided on the connector head 20.

[0050] As Figures 2 - 6 shown, this battery holder includes a battery holder body 100, a second connector 200, and an elastic member 300. Among them, the battery holder body 100 is provided with a limit installation portion 110 that cooperates with the connector head 20, and an installation hole is provided on the limit installation portion 110. The second connector 200 is slidably assembled on the battery holder body 100, and at least part of the second connector 200 is slidably disposed in the installation hole. The second connector 200 is connected to the first connector 21. The elastic member 300 is provided on the battery holder body 100 and is connected to the second connector 200. The elastic member 300 is configured to always apply a pressure to the second connector 200 so that the second connector 200 can always closely adhere to the first connector 21.

[0051] After the battery holder and the battery 10 are assembled, the elastic member 300 will be compressed. The compressed elastic member 300 will apply a thrust to the second connector 200 under the action of the elastic restoring force, making it closely adhere to the first connector 21. When the battery holder and the battery 10 are separated due to vibration, the elastic member 300 will elongate under the action of the elastic restoring force to ensure that the second connector 200 always closely adheres to the first connector 21, avoiding friction caused by relative movement between the second connector 200 and the first connector 21. This not only improves the reliability of the electrical connection between the second connector 200 and the first connector 21, but also avoids wear of the connection contacts between the second connector 200 and the first connector 21, extending the service life of the second connector 200 and the first connector 21.

[0052] When the battery 10 moves from a position separated from the battery holder towards the battery holder due to vibration or other reasons, the elastic member 300 will be compressed and elastically deformed. If the vibration force is too large, the connector 20 will press against the limit installation part 110 of the battery holder, and the limit installation part 110 will limit the movement of the battery 10 to prevent the deformation of the elastic member 300 from being too large due to the further movement of the battery 10. That is, the limit installation part 110 shares a part of the acting force from the battery 10 for the elastic member 300, making the elastic member 300 not easily undergo fatigue failure, thereby improving the reliability of the electrical connection between the battery holder and the battery 10 and extending the service life of the battery holder.

[0053] Optionally, continue to refer to Figures 1 - 3 , in this embodiment, the first connector 21 is a socket, the socket includes a panel 211 and jacks 212 provided on the panel 211, the second connector 200 is a plug, the plug includes a contact surface 210 and conductive sheets 220 provided on the contact surface 210, the conductive sheets 220 are inserted into the jacks 212, and the contact surface 210 abuts against the panel 211. When the battery 10 is separated from the battery holder due to vibration or other reasons, under the action of the elastic member 300, the contact surface 210 always abuts against the panel 211 to prevent the conductive sheets 220 and the jacks 212 from moving relative to each other and wearing.

[0054] Of course, in other embodiments, the first connector 21 can also be a plug, and correspondingly, the second connector 200 is a socket. It can be set according to actual needs, and the present application does not make specific limitations.

[0055] Furthermore, continue to refer to Figure 1 and Figure 2 , one of the first connector 21 and the second connector 200 is provided with a connection hole 213, and the other is provided with a connection rib 230, and the connection rib 230 is inserted into the connection hole 213. By providing the connection hole 213 and the connection rib 230, the connection strength between the first connector 21 and the second connector 200 can be improved, the risk of the first connector 21 and the second connector 200 being separated due to vibration can be reduced, and further the risk of the first connector 21 and the second connector 200 being worn due to relative movement can be reduced, and the reliability of the electrical connection between the first connector 21 and the second connector 200 is further improved.

[0056] In this embodiment, the connection hole 213 is provided on the first connector 21, and the connection rib 230 is provided on the second connector 200.

[0057] Optionally, in this embodiment, there are multiple connecting ribs 230, and the multiple connecting ribs 230 are arranged at intervals along the circumferential direction of the second connector 200. Correspondingly, there are also multiple connecting holes 213, and the connecting holes 213 are arranged in one-to-one correspondence with the connecting ribs 230. By providing multiple connecting holes 213 and connecting ribs 230, the connection strength between the first connector 21 and the second connector 200 is further improved.

[0058] Optionally, the connecting rib 230 can be connected to the connecting hole 213 by snap connection or by interference fit, and can be set according to actual needs. This application does not make specific limitations.

[0059] Further, continue to refer to Figure 4 , the second connector 200 includes a connecting portion 201 and a limiting portion 202 that are connected to each other. The connecting portion 201 is slidably disposed in the mounting hole. The connecting portion 201 is used to connect to the first connector 21. The limiting portion 202 can abut against the limiting mounting portion 110 to limit the sliding distance of the connecting portion 201. That is, through the limiting cooperation between the limiting portion 202 and the limiting mounting portion 110, the second connector 200 can be reliably mounted in the battery holder body 100, and the second connector 200 can be prevented from falling off from the mounting hole when the battery holder is not assembled with the battery 10.

[0060] It can be understood that under normal working conditions, the limiting portion 202 may not abut against the limiting mounting portion 110. Under the working conditions of strong vibration, the limiting portion 202 abuts against the limiting mounting portion 110 to achieve the purpose of limiting the sliding distance of the connecting portion 201.

[0061] Optionally, in this embodiment, the connecting portion 201 and the limiting portion 202 have a stepped structure, and the stepped surface on the limiting portion 202 can abut against the limiting mounting portion 110 to limit the movement distance of the second connector 200.

[0062] Further, continue to refer to Figure 1 , on the limiting mounting portion 110, a seal 400 is provided around the outer edge of the mounting hole. The seal 400 can fit against the connector head 20. By providing the seal 400, the first connector 21 and the second connector 200 can be sealed from the outside, and water or other impurities from the outside can be prevented from entering the connection between the first connector 21 and the second connector 200 and affecting the electrical connection between the first connector 21 and the second connector 200.

[0063] Optionally, the seal 400 can be an O-ring.

[0064] Optionally, in a possible embodiment, the seal 400 may also be fixed to the position limiting mounting portion 110 by bonding. In other possible embodiments, a fixing groove may be provided on the position limiting mounting portion 110, and the seal 400 may be installed in the fixing groove. Of course, the connection between the seal 400 and the position limiting mounting portion 110 may also be other, which can be set according to actual needs, and is not specifically limited in this application.

[0065] Further, see Figures 3 - 6 The elastic member 300 includes a force-applying section 310 with elastic deformation capability and connecting sections 320 arranged at both ends of the force-applying section 310, the connecting section 320 is connected to the battery holder body 100, and a first card slot 240 is provided at the bottom of the second connector 200, and the first card slot 240 is used to be engaged with the force-applying section 310. The elastic member 300 is connected to the second connector 200 by card connection, and the structure is simple, which facilitates the assembly between the second connector 200 and the elastic member 300, and there is no need to set other structures for fixing the second connector 200 on the battery holder body 100, which reduces the processing difficulty of the battery holder body 100.

[0066] Optionally, the elastic member 300 may be a spring sheet, and the force-applying section 310 may be formed by bending, which has a simple structure and is easy to process.

[0067] Optionally, continue to see Figure 2 , Figure 3 and Figure 6 In this embodiment, the battery holder body 100 further includes a bracket 120, the bracket 120 is used to be connected to the vehicle frame, the position limiting mounting portion 110 is detachably mounted on the bracket 120, the position limiting mounting portion 110 and the bracket 120 are surrounded to form an installation space, and the elastic member 300 and the second connector 200 are placed in the installation space. The battery holder body 100 has a simple and compact structure, is easy to process, and has a low cost.

[0068] Further, in the present embodiment, the two connecting sections 320 of the elastic member 300 are respectively connected to the opposite side plates of the bracket 120. Specifically, the bolts are sequentially inserted through the position-limiting mounting portion 110 and the connecting sections 320 and then connected to the bracket 120. In this way, the position-limiting mounting portion 110, the elastic member 300 and the bracket 120 can be fixed together by the bolts. Compared with the position-limiting mounting portion 110 and the elastic member 300 being respectively connected to the bracket 120, the structure of the bracket 120 is simplified, and the installation process between the position-limiting mounting portion 110, the bracket 120 and the elastic member 300 is simplified.

[0069] Further, see Figure 1 and Figure 2, a first engaging portion 130 and a pair of second engaging portions 140 are further provided on the limit mounting portion 110. A second slot 22 that is engaged and cooperated with the first engaging portion 130 and a pair of third slots 23 that are engaged and cooperated with the second engaging portions 140 are provided on the connector 20. And the top of the first engaging portion 130 is an arc surface. During the process of installing the battery 10 into the battery holder, the first engaging portion 130 first snaps into the second slot 22, and with the first engaging portion 130 as the rotation fulcrum, the installation of the battery 10 is completed by rotation. Finally, the second engaging portion 140 is engaged with the corresponding third slot 23, and the first connector 21 is connected to the second connector 200. Setting the top of the first engaging portion 130 as an arc surface can improve the smoothness of the rotation of the battery 10.

[0070] Embodiment Two

[0071] This embodiment provides a battery holder, which has substantially the same structure as that of Embodiment One, and is only improved on the basis of Embodiment One. Therefore, only the differences between the two are described here, and the same structures of this embodiment and Embodiment One are not described again here.

[0072] Specifically, as Figures 7 - 9 shown, in this embodiment, an installation groove 150 opposite to the installation hole 111 is provided on the battery holder body 100. The second connector 200 includes a connecting portion 201 and a limiting portion 202 that are connected to each other. The connecting portion 201 is slidably disposed in the installation hole 111, and the connecting portion 201 is used to be connected to the first connector 21. The limiting portion 202 is slidably installed in the installation groove 150. The elastic member 300 is disposed in the installation groove 150. One end of the elastic member 300 abuts against the bottom wall of the installation groove 150, and the other end abuts against the bottom of the limiting portion 202. By installing the second connector 200 and the elastic member 300 through the installation groove 150, the structure is simple, the installation and disassembly are relatively convenient, and the installation reliability is relatively good.

[0073] Optionally, the elastic member 300 can be a rubber pad, a wave washer, a spring, etc.

[0074] Further, continue to refer to Figures 7 - 9 , in this embodiment, the battery holder body 100 further includes a supporting plate 160. A retaining edge 112 surrounding the installation hole 111 is provided inside the limit mounting portion 110. The retaining edge 112 is detachably connected to the supporting plate 160 and encloses to form the installation groove 150. With such a setting, when assembling the battery holder, first place the second connector 200 and the elastic member 300 into the retaining edge 112 in sequence, and then assemble the supporting plate 160. When it is necessary to repair or replace the second connector 200 or the elastic member 300, just remove the supporting plate 160. The assembly and repair of the battery holder are relatively convenient.

[0075] Optionally, the edge stop 112 can be annular or U-shaped, which can be set according to actual needs, and the present application does not make specific limitations.

[0076] Optionally, continue to refer to Figures 7 - 9 , in this embodiment, along the circumferential direction of the edge stop 112, a plurality of clamping protrusions 1121 are provided on the outer peripheral wall of the edge stop 112, and a plurality of elastic buckles 161 are provided on the supporting plate 160. The elastic buckles 161 and the clamping protrusions 1121 are arranged in one-to-one correspondence, and the elastic buckles 161 are clamped to the corresponding clamping protrusions 1121. The detachable connection between the edge stop 112 and the supporting plate 160 is realized by clamping, and the structure is simple, and the installation and disassembly are relatively convenient.

[0077] Embodiment III

[0078] As Figure 10 shown, this embodiment provides a battery assembly, including a battery 10, a first battery seat and a second battery seat. Both ends of the battery 10 are respectively connected to the first battery seat and the second battery seat. Among them, the first battery seat is the battery seat in Embodiment I or Embodiment II.

[0079] Since the above battery seat is adopted in this battery assembly, the power supply reliability is better and the service life is longer.

[0080] Embodiment IV

[0081] Continue to refer to Figure 10 , this embodiment provides an electric bicycle, including a frame 50 and the battery assembly in Embodiment III. A receiving cavity 51 is provided on the frame 50, and the first battery seat and the second battery seat of the battery assembly are respectively installed at opposite ends of the receiving cavity 51.

[0082] Since the above battery assembly is adopted in this electric bicycle, the risk of power interruption during riding is lower, and the failure rate of the battery assembly is also lower.

[0083] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A battery holder, used for fixing a battery (10), wherein one end of the battery (10) is provided with a connector (20), and the connector (20) is provided with a first connector (21), characterized in that: The battery holder comprises: A battery seat body (100), wherein the battery seat body (100) is provided with a position limiting mounting portion (110) matched with the connector (20), and the position limiting mounting portion (110) is provided with a mounting hole (111); A second connector (200) is slidably mounted on the battery holder body (100), at least a portion of the second connector (200) is slidably disposed in the mounting hole (111), and the second connector (200) is connected to the first connector (21); An elastic member (300) is arranged on the battery holder body (100), and the elastic member (300) is configured to always apply pressure to the second connector (200) so that the second connector (200) can always be in close contact with the first connector (21).

2. The battery holder according to claim 1, characterized in that: One of the first connector (21) and the second connector (200) is provided with a connection hole (213), and the other is provided with a connection rib (230), and the connection rib (230) is inserted into the connection hole (213).

3. The battery holder according to claim 1, characterized in that: The second connector (200) comprises a connecting portion (201) and a limiting portion (202) which are connected to each other, the connecting portion (201) being slidably arranged in the mounting hole (111), and the limiting portion (202) being capable of abutting against the limiting mounting portion (110) to limit the sliding distance of the connecting portion (201).

4. The battery holder according to claim 1, characterized in that: On the position-limiting installation portion (110), a sealing member (400) is provided around the outer edge of the installation hole (111), and the sealing member (400) can be fitted to the connector (20).

5. The battery holder according to any one of claims 1 to 4, characterized in that: The elastic member (300) comprises a force-applying section (310) having elastic deformation capability and connecting sections (320) arranged at both ends of the force-applying section (310), wherein the connecting section (320) is connected to the battery holder body (100), and a first card slot (240) is provided at the bottom of the second connector (200), wherein the first card slot (240) is used for card connection with the force-applying section (310).

6. The battery holder according to any one of claims 1 to 4, characterized in that: The battery holder body (100) is provided with a mounting groove (150) opposite to the mounting hole (111); the second connector (200) comprises a connecting portion (201) and a limiting portion (202) which are connected to each other; the connecting portion (201) is slidably arranged in the mounting hole (111); the connecting portion (201) is used to be connected to the first connector (21); the limiting portion (202) is slidably installed in the mounting groove (150); the elastic member (300) is arranged in the mounting groove (150); one end of the elastic member (300) abuts against the bottom wall of the mounting groove (150), and the other end abuts against the bottom of the limiting portion (202).

7. The battery holder according to claim 6, characterized in that: The battery holder body (100) further comprises a supporting plate (160), the inner side of the position-limiting mounting portion (110) is provided with a retaining edge (112) surrounding the mounting hole (111), the retaining edge (112) and the supporting plate (160) are detachably connected and surround the mounting groove (150).

8. The battery holder according to claim 7, characterized in that: A plurality of latching protrusions (1121) are provided on the outer peripheral wall of the retaining edge (112) along the circumference of the retaining edge (112), and a plurality of elastic latches (161) are provided on the supporting plate (160), wherein the elastic latches (161) are arranged in a one-to-one correspondence with the latching protrusions (1121), and the elastic latches (161) are latched with the corresponding latching protrusions (1121).

9. The battery holder according to claim 1, characterized in that: The elastic member (300) is a spring, a rubber pad or a wave pad.

10. A battery assembly, characterized in that It comprises a battery (10), a first battery holder and a second battery holder, wherein two ends of the battery (10) are respectively connected to the first battery holder and the second battery holder; wherein the first battery holder is the battery holder according to any one of claims 1 to 9.

11. An electric bicycle, characterized in that: It comprises a vehicle frame (50) and the battery assembly according to claim 10, wherein the vehicle frame (50) is provided with a receiving cavity (51), and a first battery seat and a second battery seat of the battery assembly are respectively mounted at opposite ends of the receiving cavity (51).

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