CN220324657U - Detachable battery pack - Google Patents

Abstract

The utility model discloses a detachable battery pack, comprising: the battery comprises a first connecting sheet, a second connecting sheet, a battery body and an electric conductor. The first connecting piece comprises a connecting plate and a first buckle arranged along the outer edge of the connecting plate; the second connecting piece comprises a bearing plate, a plurality of main contact claws and a plurality of second buckles arranged along the outer edge of the bearing plate. The positive electrode and the negative electrode of the battery body are respectively connected with the first connecting piece and the second connecting piece, and are synchronous, the first connecting piece and the second connecting piece are also arranged on one side of the electric conductor, the battery body is connected with the electric conductor through a connecting structure formed by at least one group of first connecting pieces and the second connecting piece, after the first buckle is connected with the second buckle, the main contact claw is contacted with the first contact surface to realize current conduction, normal use of the battery body after connection is ensured, quick installation or disassembly can be realized through connection of the first buckle and the second buckle, and convenience and efficiency of operation are greatly improved.

Description

Detachable battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a detachable battery pack.

Background

The battery module or the battery pack is formed by electrically connecting and combining a plurality of single batteries, is used in more and more fields based on the advantages of the battery, and is more prominent in the current new energy automobiles, and has great demands on the battery module or the battery pack.

The combination form of the battery module or the battery pack in the market is as follows: placing a plurality of single batteries at specified positions, connecting the single batteries in series or in parallel through wires with different colors, and finally leading out a total positive electrode and a total negative electrode; because the number of the single batteries is large, a large number of wires are needed for connection, so that large labor and time are consumed, and the production efficiency is greatly influenced.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a detachable battery pack.

The utility model discloses a detachable battery pack, comprising:

a first connecting piece; it comprises a connecting plate and a first buckle arranged along the outer edge of the connecting plate, the connecting plate is provided with a first contact surface, and

the second connecting piece comprises a bearing plate, a plurality of main contact claws and a plurality of second buckles arranged along the outer edge of the bearing plate, the bearing plate is provided with a second contact surface, the first contact surface and the second contact surface are opposite to each other, the main contact claws are distributed on the second contact surface at intervals, one end of each main contact claw is connected with the second contact surface of the bearing plate, the other end of each main contact claw extends towards the direction far away from the second contact surface and is abutted against the first contact surface, and the first buckles are detachably connected with the second buckles;

a battery body; the positive electrode and the negative electrode are respectively connected with the first connecting sheet and the second connecting sheet, and

a second connecting piece and/or a first connecting piece are connected to one side of the electric conductor facing the battery body;

the first connecting piece on the battery body is connected with the second connecting piece on the electric conductor, and/or the second connecting piece on the battery body is connected with the first connecting piece on the electric conductor.

According to an embodiment of the present utility model, a first connection angle is formed between the first buckle and the connection plate, and the first connection angle is a right angle, an obtuse angle or a flat angle.

According to an embodiment of the present utility model, a second connection angle is formed between the second buckle and the bearing plate, and the second connection angle is a right angle or an obtuse angle.

According to an embodiment of the utility model, the second buckle is provided with a bayonet, and one end of the first buckle, which is far away from the connecting plate, is clamped with the bayonet.

According to an embodiment of the utility model, an end portion of the first buckle, which is far away from the connecting plate, is provided with an arc surface, an end portion of the second buckle, which is far away from the bearing plate, is provided with an inclined surface, one end of the inclined surface extends to the bayonet, and the arc surface is matched with the inclined surface.

According to an embodiment of the utility model, the first connecting piece further includes a plurality of clamping blocks, the plurality of clamping blocks are distributed on the connecting plate at intervals, and the clamping blocks extend along a direction away from the second connecting piece.

According to an embodiment of the present utility model, the first connecting piece further includes a plurality of contact blocks, one ends of the plurality of contact blocks are connected to the first contact surface, and the other ends of the plurality of contact blocks abut against the second contact surface.

According to one embodiment of the utility model, the main contact claw comprises a first contact section and a second contact section, one end of the first contact section is connected with the second contact surface, one end of the second contact section is connected with the other end of the first contact section, the other end of the second contact section extends towards the direction close to the second contact surface, and the joint of the first contact section and the second contact section is arc-shaped and is in abutting connection with the first contact surface.

According to an embodiment of the present utility model, the second connecting piece further includes a plurality of secondary contact claws, one end of each secondary contact claw is connected to the second contact surface, the other end of each secondary contact claw extends in a direction away from the second contact surface and abuts against the first contact surface, and the plurality of secondary contact claws and the plurality of primary contact claws are distributed in a staggered manner.

According to one embodiment of the utility model, a first included angle exists between the main contact claw and the second contact surface, a second included angle exists between the secondary contact claw and the second contact surface, and the first included angle is smaller than the second included angle.

The utility model has the beneficial effects that: the positive electrode and the negative electrode of the battery body are respectively connected with the first connecting piece and the second connecting piece, and are synchronous, the first connecting piece and the second connecting piece are also arranged on one side of the electric conductor, the battery body is connected with the electric conductor through a connecting structure formed by at least one group of first connecting pieces and the second connecting piece, after the first buckle is connected with the second buckle, the main contact claw is contacted with the first contact surface to realize current conduction, normal use of the battery body after connection is ensured, quick installation or disassembly can be realized through connection of the first buckle and the second buckle, and convenience and efficiency of operation are greatly improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

fig. 1 is a schematic perspective view of a detachable battery pack;

FIG. 2 is a schematic diagram illustrating the connection of the first connecting piece and the second connecting piece;

FIG. 3 is a split state diagram of the first connecting piece and the second connecting piece;

FIG. 4 is a cross-sectional view of the first connecting tab;

fig. 5 is a schematic perspective view of a first connecting piece;

FIG. 6 is a cross-sectional view of the second connecting tab;

FIG. 7 is a schematic view of a portion of the structure of the second connecting piece;

FIG. 8 is another schematic illustration of the connection of the first connecting piece and the second connecting piece;

FIG. 9 is another split state diagram of the first connecting piece and the second connecting piece;

FIG. 10 is another cross-sectional view of the second connecting tab;

fig. 11 is a schematic perspective view of a battery body;

fig. 12 is a schematic perspective view of an electrical conductor;

FIG. 13 is a schematic view showing another connection of the first connecting piece and the second connecting piece;

FIG. 14 is a further exploded view of the first and second connecting pieces;

FIG. 15 is a schematic view showing a further perspective structure of the first connecting piece;

FIG. 16 is yet another cross-sectional view of the first connecting tab;

FIG. 17 is yet another cross-sectional view of the second connecting tab;

fig. 18 is another perspective view of a detachable battery pack;

fig. 19 is another perspective view of a battery body;

fig. 20 is a schematic view of another perspective structure of the battery body;

FIG. 21 is another perspective view of an electrical conductor;

fig. 22 is a schematic view of still another perspective structure of the electric conductor.

Reference numerals illustrate:

10-a first connecting piece; 101-connecting plates; 1011-a first contact surface; 1012-a first fixing surface; 102-a first buckle; 1021-arc surface; 103—a first connection angle; 104-clamping blocks; 105-contact blocks;

20-a second connecting piece; 201-a carrier plate; 2011-a second contact surface; 2012-a second fixation surface; 2013-a carrier hole; 202-a main contact jaw; 2021-first contact segment; 2022-second contact segment; 2023-first included angle; 203-time contact claw; 2031-a second included angle; 204-a second clasp; 2041-bayonet; 2042-ramp; 205-second connection angle;

30-a battery body;

40-electric conductor.

Detailed Description

Various embodiments of the utility model are disclosed in the following drawings, in which details of the practice are set forth in the following description for the purpose of clarity. However, it should be understood that these practical details are not to be taken as limiting the utility model. That is, in some embodiments of the utility model, these practical details are unnecessary. Moreover, for the purpose of simplifying the drawings, some conventional structures and components are shown in the drawings in a simplified schematic manner.

In addition, the descriptions of the "first," "second," and the like, herein are for descriptive purposes only and are not intended to be specifically construed as order or sequence, nor are they intended to limit the utility model solely for distinguishing between components or operations described in the same technical term, but are not to be construed as indicating or implying any relative importance or order of such features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Example 1

As shown in fig. 1, fig. 1 is a schematic perspective view of a detachable battery pack. The detachable battery pack includes a first connection piece 10, a second connection piece 20, a battery body 30, and an electrical conductor 40, and the battery body 30 and the electrical conductor 40 are detachably connected through the first connection piece 10 and the second connection piece 20. When the number of the battery bodies 30 is plural, and the number of the conductors 40 is plural, the positive electrode and the negative electrode of each battery body 30 are respectively connected with the first connecting piece 10 and the second connecting piece 20, one side of each conductor 40 facing the battery body 30 is provided with the first connecting piece 10 and the second connecting piece 20, the first connecting piece 10 on one conductor 40 is connected with the second connecting piece 20 on one battery body 30, the second connecting piece 20 on the same conductor 40 is connected with the first connecting piece 10 on the other battery body 30, and the like, so as to form a series connection of the plurality of battery bodies 30. Specifically, the battery body 30 is a prismatic battery.

Referring to fig. 2-7, fig. 2 is a schematic connection diagram of the first connecting piece 10 and the second connecting piece 20; fig. 3 is a split state diagram of the first connecting piece 10 and the second connecting piece 20; fig. 4 is a cross-sectional view of the first connecting piece 10; fig. 5 is a schematic perspective view of the first connecting piece 10; fig. 6 is a cross-sectional view of the second connecting piece 20; fig. 7 is a schematic view of a part of the structure of the second connecting piece 20. The first connecting piece 10 includes a connecting plate 101 and a plurality of first buckles 102, the connecting plate 101 has a first contact surface 1011 and a first fixing surface 1012, the first contact surface 1011 and the second connecting piece 20 are opposite to each other, the first fixing surface 1012 is a surface of the connecting plate 101 far away from the first contact surface 1011, the first fixing surface 1012 is connected with the positive electrode end or the negative electrode end of the battery body 30, and the plurality of first buckles 102 are distributed at intervals at the outer edge of the connecting plate 101. In a specific application, one end of the first buckle 102 is connected to the edge of the connecting plate 101, and the other end of the first buckle 102 extends in a direction away from the connecting plate 101. The first connecting angle 103 is between the first buckle 102 and the first contact surface 1011, and the first connecting angle 103 may be a right angle, an obtuse angle or a flat angle, in this embodiment, the first connecting angle 103 is an obtuse angle. Further, the first connecting piece 10 further includes a plurality of clamping blocks 104, the plurality of clamping blocks 104 are distributed on the first fixing surface 1012 of the connecting plate 101 at intervals, that is, one end of each clamping block 104 is connected with the connecting plate 101, and the other end extends towards a direction away from the first fixing surface 1012, so that the first connecting piece 10 is connected with the positive end of the battery through the arrangement of the clamping blocks 104. In particular, the entire first connection tab 10 is made of a highly conductive material so as to conduct current.

The second connecting piece 20 includes a carrying plate 201, a plurality of main contact claws 202 and a plurality of second buckles 204, the carrying plate 201 has a second contact surface 2011 and a second fixing surface 2012, the second contact surface 2011 is opposite to the first contact surface 1011, the second fixing surface 2012 is a surface of the carrying plate 201 far away from the second contact surface 2011, the second fixing surface 2012 is connected with the negative electrode of the battery body 30 to achieve fixation, one ends of the main contact claws 202 are arranged on the second contact surface 2011, and the other ends of the main contact claws 202 extend towards a direction far away from the second contact surface 2011, that is, the main contact claws 202 are arranged in a manner protruding from the second contact surface 2011, and the main contact claws 202 are in butt joint with the first contact surface 1011. The second buckles 204 are spaced apart from the outer edge of the carrier 201, and the second buckles 204 are adapted to the first buckles 102 and detachably connected, i.e. the connection between the first buckles 102 and the second buckles 204 may be connection between two batteries. A second connection angle 205 exists between the second buckle 204 and the second contact surface 2011, and the second connection angle 205 may be a right angle or an obtuse angle, in this embodiment, the second connection angle 205 is a right angle, that is, the second buckle 204 is disposed perpendicular to the second contact surface 2011.

Further, the carrier 201 further has a carrier hole 2013, and the plurality of main contact fingers 202 are distributed on a wall surface of the carrier hole 2013 at intervals. Specifically, the bearing hole 2013 is located at a middle position of the bearing plate 201, and of course, the bearing hole 2013 may be formed at other positions, not limited to the middle position. The carrier 201 in this embodiment is made of a highly conductive material, such as aluminum, copper, etc., so as to conduct current.

The main contact claw 202 includes a first contact section 2021 and a second contact section 2022, one end of the first contact section 2021 is connected to a wall surface of the bearing hole 2013, the other end of the first contact section 2021 extends in a direction away from the second contact surface 2011, meanwhile, the other end of the first contact section 2021 is connected to one end of the second contact section 2022, and the other end of the second contact section 2022 extends in a direction close to the second contact surface 2011. Preferably, the cross section of the connection between the first contact section 2021 and the second contact section 2022 is in an arc structure, and since the connection between the first contact section 2021 and the second contact section 2022 is the first place to make contact, the arc structure is beneficial to increasing the contact area, and in addition, the first contact surface 1011 is not easy to be damaged. In a specific application, the main contact claw 202 is made of a material with high conductivity and high yield strength, so that not only can conductivity be realized, but also deformation can be realized under the action of force, and better forward force can be generated after deformation so as to reduce the resistance value existing in the electric connection.

The second connecting piece 20 further includes a plurality of secondary contact claws 203, the plurality of secondary contact claws 203 are also disposed on the wall surface of the bearing hole 2013, and the plurality of secondary contact claws 203 and the plurality of primary contact claws 202 are disposed in a staggered manner, that is, one secondary contact claw 203 is disposed between two primary contact claws 202, and similarly, one primary contact claw 202 is disposed between two secondary contact claws 203. The structure of the secondary contact claw 203 is the same as that of the primary contact claw 202, that is, one end of the secondary contact claw 203 is connected with the wall surface of the bearing hole 2013, and the other end extends towards the direction away from the second contact surface 2011, and the secondary contact claw 203 is also provided with an arc structure; when a sufficient force is applied to the battery, the plurality of primary contact claws 202 and the plurality of secondary contact claws 203 are in contact with the first contact surface 1011. In this embodiment, since the first contact section 2021 extends in a direction away from the second contact surface 2011, a first included angle 2023 exists between the first contact section 2021 and the second contact surface 2011, and similarly, a second included angle 2031 exists between the secondary contact claw 203 and the second contact surface 2011, wherein the angle of the second included angle 2031 is larger than the first included angle 2023, and it is further required to indicate that the distance that the secondary contact claw 203 extends is smaller than the length of the first contact section 2021, and when the primary contact claw 202 is deformed in the direction of the second contact surface 2011, the secondary contact claw 203 contacts with the battery again, so as to further increase the contact with the battery; in addition, since the main contact claw 202 is manufactured by the stamping process in the actual production process, the secondary contact claw 203 is to reuse the material which should be used as the waste material, so as to avoid the waste of the material.

Through the arrangement of a plurality of main contact claws 202, each main contact claw 202 is a contact point, so that the number of the contact points is greatly increased, more paths are added for current conduction, and finally, the conduction of large current is ensured, so that the actual use requirement is met.

The second buckle 204 has a bayonet 2041, and when the first buckle 102 is connected with the second buckle 204, an end portion of the first buckle 102 away from the connecting plate 101 is located in the bayonet 2041, so that connection of two batteries is achieved. Further, the end of the first buckle 102 far away from the connecting plate 101 has an arc surface 1021, the end of the second buckle 204 far away from the bearing plate 201 has an inclined surface 2042, the inclined surface 2042 extends to the bayonet, and the connection of the first buckle 102 and the second buckle 204 is facilitated through the cooperation of the arc surface 1021 and the inclined surface 2042, so that the guiding and smooth transition effects are achieved. In the embodiment, an end of the second buckle 204 away from the carrier 201 is bent toward the second contact surface 2011, so as to form a bayonet 2041. Specifically, the second buckle 204 is made of a material with high yield strength, when the first buckle 102 moves along the inclined plane 2042 towards the bayonet 2041, the second buckle 204 will be stretched outwards under the action force exerted by the first buckle 102, and after the first buckle 102 falls into the bayonet 2041, the second buckle 204 is reset. Because the second buckle 204 has a deformable characteristic, when the first buckle 102 needs to be detached, the first buckle 102 can be detached from the bayonet 2041 only by applying a sufficient force to the first connecting piece 10.

Example two

Fig. 8-10 show another connection schematic of the first connection piece 10 and the second connection piece 20 in fig. 8; FIG. 9 is another split state diagram of the first connecting piece and the second connecting piece; fig. 10 is another cross-sectional view of the second connecting piece 20. The structure of the present embodiment is substantially the same as that of the first embodiment, except that the first connecting piece 10 in the present embodiment is not provided with the clamping block 104, but is directly connected to the positive electrode of the battery body 30 through the first fixing surface 1012, and specifically, the first fixing surface 1012 is connected to the positive electrode end surface of the battery body 30 by welding. In addition, the first connection angle 103 between the connection plate 101 and the first buckle 102 in this embodiment is specifically a flat angle. Meanwhile, in the present embodiment, the first included angle 2023 and the second included angle 2031 of the main contact claw 202 and the sub contact claw 203 relative to the second contact surface 2011 are also adjusted, so that the main contact claw 202 and the sub contact claw 203 in the present embodiment are flatter.

Example III

As shown in fig. 7, 11-17, fig. 11 is a schematic perspective view of the battery body 30; fig. 12 is a schematic perspective view of the conductor 40; fig. 13 is a schematic view of another connection between the first connection piece 10 and the second connection piece 20; fig. 14 is a further exploded view of the first connecting piece 10 and the second connecting piece 20; fig. 15 is a schematic view of a further perspective structure of the first connecting piece 10; fig. 16 is a further sectional view of the first connecting piece 10; fig. 17 is a further sectional view of the second connecting piece 20. The structure of the present embodiment is similar to that of the first embodiment, and the difference is that the first connecting piece 10 further includes a plurality of contact blocks 105, one end of the contact block 105 is connected with the first contact surface 1011, the other end of the contact block 105 is abutted with the second contact surface 2011, the contact point between the first connecting piece 10 and the second connecting piece 20 is further increased by the arrangement of the contact block 105, meanwhile, the contact block 105 also plays a limiting role, so that the first contact surface 1011 and the second contact surface 2011 are prevented from being damaged due to the application of excessive force to the first connecting piece 10. Specifically, the first fixing surface 1012 is pressed against the first contact surface 1011 by a pressing process, so as to form the contact block 105.

In addition, the second connection angle 205 between the second buckle 204 and the second contact surface 2011 in the present embodiment is an obtuse angle, so that a space exists between the second buckle 204 and the negative end of the battery body 30, and the space provides a space for the second buckle 204 to spread outwards during the process of the first buckle 102 being snapped into the bayonet 2041. Furthermore, in this embodiment, the two second buckles 204 are further connected as a group, so that the stress strength of the second buckles 204 is enhanced, and the service life of the second buckles 204 is prolonged.

Example IV

As shown in fig. 18-22, fig. 18 is another schematic perspective view of a detachable battery pack; fig. 19 is another perspective view of the battery body 30; fig. 20 is a schematic view of still another perspective structure of the battery body 30; fig. 21 is another perspective view of the conductor 40; fig. 22 is a schematic view of still another perspective structure of the electric conductor 40. The structure of this embodiment is basically the same as that of the first embodiment, and the difference is that the battery body 30 is a cylindrical battery, and the positive and negative electrodes of the battery body 30 are respectively at two ends, and since the plurality of battery bodies 30 need to be connected in parallel, there are two cases in which the electric conductor 40 is provided with only the plurality of first connecting pieces 10, and the plurality of first connecting pieces 10 on the electric conductor 40 are connected with the plurality of second connecting pieces 20 on the plurality of battery bodies 30; alternatively, only the plurality of second connection pieces 20 are provided on the electric conductor 40, and the plurality of second connection pieces 20 on the electric conductor 40 are connected to the plurality of first connection pieces 10 on the battery body 30. In a specific application, a plurality of battery bodies 30 are distributed side by side, a positive electrode end of each battery body 30 is connected with a conductor 40, and a negative electrode end of each battery body 30 is connected with another conductor 40, so that a plurality of battery bodies 30 are connected in parallel; when the anode or the cathode of the parallel battery body 30 needs to be led out, the first connecting piece 10 or the second connecting piece 20 needs to be added on one side of the conductor 40 away from the battery body 30, and then one conductor 40 is added, and the two conductors 40 are also connected through the first connecting piece 10 and the second connecting piece 20.

Example five

The structure of this embodiment is basically the same as that of the fourth embodiment, except that the first connecting piece 10 and the second connecting piece 20 in this embodiment are both the structure of the second embodiment, and the battery body 30 is still the structure of the fourth embodiment.

Example six

The present embodiment is similar to the structure of the fourth embodiment, except that the first connecting piece 10 and the second connecting piece 20 in the present embodiment are both structures of the third embodiment, and the battery body 30 is still structures of the fourth embodiment.

In summary, the first connecting piece 10 and the second connecting piece 20 are respectively connected to the positive electrode and the negative electrode of the battery body 30, and are synchronous, the first connecting piece 10 and the second connecting piece 20 are also arranged on one side of the electric conductor 40, the battery body 30 and the electric conductor 40 are connected through at least one group of connecting structures consisting of the first connecting piece 10 and the second connecting piece 20, after the first buckle 102 is connected with the second buckle 204, the main contact claw 202 is in contact with the first contact surface 1011 to realize current conduction, normal use of the battery body 30 is ensured, rapid installation or disassembly can be realized through connection of the first buckle 102 and the second buckle 204, and convenience and efficiency of operation are greatly improved.

The foregoing description is only illustrative of the utility model and is not to be construed as limiting the utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the present utility model, should be included in the scope of the claims of the present utility model.

Claims (10)

1. A removable battery pack, comprising:

a first connecting piece (10); comprising a connecting plate (101) and a first buckle (102) arranged along the outer edge of the connecting plate (101), wherein the connecting plate (101) is provided with a first contact surface (1011), and

the second connecting piece (20) comprises a bearing plate (201), a plurality of main contact claws (202) and a plurality of second buckles (204) arranged along the outer edge of the bearing plate (201), the bearing plate (201) is provided with a second contact surface (2011), the first contact surface (1011) and the second contact surface (2011) are opposite to each other, the plurality of main contact claws (202) are distributed on the second contact surface (2011) at intervals, one end of each main contact claw (202) is connected with the second contact surface (2011) of the bearing plate (201), the other end of each main contact claw (202) extends in a direction away from the second contact surface (2011) and is in butt joint with the first contact surface (1011), and the first buckles (102) are detachably connected with the second buckles (204);

a battery body (30); the positive electrode and the negative electrode of the battery are respectively connected with the first connecting sheet (10) and the second connecting sheet (20), and

an electric conductor (40) to one side of which the battery body (30) faces, the second connecting piece (20) and/or the first connecting piece (10) being connected;

wherein the first connecting piece (10) on the battery body (30) is connected with the second connecting piece (20) on the electric conductor (40), and/or the second connecting piece (20) on the battery body (30) is connected with the first connecting piece (10) on the electric conductor (40).

2. The detachable battery pack according to claim 1, wherein a first connection angle (103) is present between the first buckle (102) and the connection plate (101), the first connection angle (103) being a right angle, an obtuse angle or a flat angle.

3. The detachable battery pack according to claim 1, wherein a second connection angle (205) is present between the second buckle (204) and the carrier plate (201), the second connection angle (205) being a right angle or an obtuse angle.

4. The detachable battery pack according to claim 2, wherein the second buckle (204) has a bayonet (2041), and the end of the first buckle (102) remote from the connection plate (101) is engaged with the bayonet (2041).

5. The detachable battery pack according to claim 4, wherein an end of the first buckle (102) away from the connecting plate (101) has a cambered surface (1021), an end of the second buckle (204) away from the carrier plate (201) has a bevel (2042), one end of the bevel (2042) extends to the bayonet (2041), and the cambered surface (1021) is matched with the bevel (2042).

6. The detachable battery pack according to claim 1, wherein the first connecting piece (10) further comprises a plurality of clamping blocks (104), the plurality of clamping blocks (104) are distributed on the connecting plate (101) at intervals, and the clamping blocks (104) are arranged in an extending manner along a direction away from the second connecting piece (20).

7. The detachable battery pack according to claim 1, wherein the first connecting piece (10) further comprises a plurality of contact blocks (105), one end of the plurality of contact blocks (105) is connected to the first contact surface (1011), and the other end thereof abuts the second contact surface (2011).

8. The detachable battery pack according to any one of claims 1-7, wherein the main contact claw (202) comprises a first contact section (2021) and a second contact section (2022), one end of the first contact section (2021) is connected with the second contact surface (2011), one end of the second contact section (2022) is connected with the other end of the first contact section (2021), the other end of the second contact section (2022) extends towards a direction approaching the second contact surface (2011), and a joint of the first contact section (2021) and the second contact section (2022) is arc-shaped and is in abutting contact with the first contact surface (1011).

9. The detachable battery pack according to any one of claims 1 to 7, wherein the second connecting piece (20) further comprises a plurality of secondary contact claws (203), one end of the secondary contact claw (203) is connected to the second contact surface (2011), and the other end extends in a direction away from the second contact surface (2011) and abuts against the first contact surface (1011), and the plurality of secondary contact claws (203) are staggered with the plurality of primary contact claws (202).

10. The detachable battery pack according to claim 9, wherein a first angle (2023) exists between the primary contact jaw (202) and the second contact surface (2011), a second angle (2031) exists between the secondary contact jaw (203) and the second contact surface (2011), and the first angle (2023) is smaller than the second angle (2031).