CN220830059U - Battery pack - Google Patents

Abstract

The application provides a battery pack, which comprises a first shell and a second shell, wherein the first shell is provided with a protruding part; a second housing provided with a groove accommodating the boss; be provided with the colloid in the recess, bellying passes through colloid and groove connection to realize the connection of first casing and second casing. The protruding part of the first shell stretches into the groove provided with the colloid, after the colloid in the groove is solidified, the protruding part is connected with the groove through the colloid, so that the connection between the first shell and the second shell is realized, and the operation is simple and convenient when the first shell and the second shell are installed, and the installation efficiency is high; and because the first shell and the second shell are circumferentially connected through the colloid, the solidified colloid also plays a role in sealing the connection position of the first shell and the second shell.

Description

Battery pack

Technical Field

The application relates to the technical field of batteries, in particular to a battery pack.

Background

In the current consumer batteries, the upper shell and the lower shell of the box body of the battery pack are connected by adopting a traditional screw or welding mode, and in order to ensure the sealing performance of the connection between the upper shell and the lower shell, foam is filled between the upper shell and the lower shell or a sealing rubber ring is used. In the method, the connection operation of the upper shell and the lower shell is tedious, the installation efficiency is low, and after long-time use, the sealing rubber ring is easy to age, and the sealing effect is poor.

Disclosure of Invention

In view of this, the application provides a battery pack, in which the connection between the protruding portion of the first casing and the groove of the second casing is realized by the colloid, so as to realize the connection between the first casing and the second casing, and the colloid can also play a role in sealing the first casing and the second casing after solidification, so that the first casing and the second casing are easy to operate and have high installation efficiency when being installed.

In order to achieve the above purpose, the present application provides the following technical solutions:

A battery pack, comprising:

A first housing provided with a boss;

a second housing provided with a groove accommodating the boss;

The groove is internally provided with a colloid, and the protruding part is connected with the groove through the colloid so as to realize the connection of the first shell and the second shell.

Preferably, the second housing includes a first side plate and a second side plate forming the groove, the first side plate is disposed near the inside of the battery pack, the second side plate is disposed far away from the inside of the battery pack, and the second side plate is higher than the first side plate.

Preferably, the first housing is provided with a stopper abutting against a side plate of the groove.

Preferably, the height of the protruding portion is smaller than the height of the groove side plate abutting against the limiting block.

Preferably, the limiting block is abutted with the second side plate.

Preferably, the protruding portion is continuously provided along the circumferential direction of the first housing, and the groove is continuously provided along the circumferential direction of the second housing.

Preferably, the distance between the protruding end part of the protruding part and the bottom wall of the groove is L, wherein L is more than or equal to 0.1mm and less than or equal to 2mm.

Preferably, the included angle between the convex part and the horizontal direction is P, wherein P is more than or equal to 85 degrees and less than or equal to 95 degrees; and, in addition, the method comprises the steps of,

And the included angle between the second side plate and the horizontal direction is Q, wherein Q is more than or equal to 85 degrees and less than or equal to 95 degrees.

Preferably, one of the first shell and the second shell is provided with a buckle, and the other is provided with a clamping block clamped with the buckle.

Preferably, the outer surface of the protruding portion is provided with serrations or threads.

Preferably, the first housing is an upper housing, and the second housing is a lower housing.

The application provides a battery pack, which comprises a first shell and a second shell, wherein the first shell is provided with a protruding part; a second housing provided with a groove accommodating the boss; be provided with the colloid in the recess, bellying passes through colloid and groove connection to realize the connection of first casing and second casing. The convex part of the first shell stretches into the groove provided with the colloid, after the colloid in the groove is solidified, the convex part is connected with the groove through the colloid, and the first shell and the second shell are easy and convenient to operate and high in installation efficiency when being installed; and because the first shell and the second shell are circumferentially connected through the colloid, the solidified colloid also plays a role in sealing the connection position of the first shell and the second shell.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a three-dimensional view of a battery pack provided in the present embodiment;

Fig. 2 is a front view of the battery pack;

FIG. 3 is a cross-sectional view taken along line 2 A-A;

Fig. 4 is a partial enlarged view of fig. 3.

In the figure: 1. a first housing; 11. a boss; 12. a limiting block; 2. a second housing; 21. a groove; 22. a first side plate; 23. a second side plate; 3. and (5) colloid.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

As shown in fig. 1 to 4, the embodiment of the present application provides a battery pack, which includes a first case 1 and a second case 2; the first housing 1 is provided with a boss 11; the second housing 2 is provided with a groove 21 accommodating the boss 11; wherein, be provided with colloid 3 in the recess 21, bellying 11 is connected with recess 21 through colloid 3 to realize the connection of first casing 1 and second casing 2.

Specifically, the first casing 1 is provided with the protruding portion 11 which is matched and connected with the second casing 2, the second casing 2 is provided with the groove 21 which can accommodate the protruding portion 11 of the first casing 1, then the colloid 3 is injected into the groove 21, the protruding portion 11 is inserted into the groove 21 provided with the colloid 3, after the colloid 3 is solidified, the protruding portion 11 is connected with the groove 21, and then the connection between the first casing 1 and the second casing 2 is realized.

The protruding portion 11 is provided along the circumferential direction of the first casing 1, and the groove 21 is also provided along the circumferential direction of the second casing 2; the protruding part 11 can be continuous or discontinuous in the circumferential direction of the first shell 1, and correspondingly, the groove 21 can be continuous or discontinuous in the second shell 2, and the two parts are aligned when being arranged discontinuously; preferably, the projection 11 is continuous in the circumferential direction of the first housing 1 and the recess 21 is continuous in the second housing 2, so that the connection of the two is effected while sealing.

It should be noted that the first housing 1 may be an upper housing, and the second housing 2 is a lower housing; the first housing 1 may also be a lower housing, in which case the second housing 2 is an upper housing, that is to say the projection 11 is provided on one of the upper and lower housings and the recess 21 is provided on the other of the upper and lower housings.

It should be noted that, the colloid 3 may be either a liquid colloid or a solid colloid, and the colloid 3 is preferably a structural sealant.

The battery pack with the structure comprises a first shell 1 and a second shell 2, wherein the first shell 1 is provided with a protruding part 11; the second housing 2 provided with a groove 21 accommodating the boss 11; by injecting the gel 3 into the groove 21, the protruding portion 11 is connected with the groove 21 through the gel 3, so as to realize the connection of the first housing 1 and the second housing 2. The protruding part 11 of the first shell 1 extends into the groove 21 provided with the colloid 3, after the colloid 3 in the groove 21 is solidified, the protruding part 11 is connected with the groove 21 through the colloid 3, so that the connection between the first shell 1 and the second shell 2 is realized, and the operation is simple and the installation efficiency is high during the installation; and because the first shell 1 and the second shell 2 are connected circumferentially through the colloid 3, the colloid 3 solidified after connection also plays a role in sealing.

Furthermore, the first housing 1 and the second housing 2 may be provided in other ways, for example: put first bellying on first casing 1, set up the second bellying on second casing 2, and set up the second recess that holds the second bellying on first casing 1, set up the first recess that holds first bellying on second casing 2, and all be connected through colloid 3 between first bellying and first recess and second bellying and the second recess, can further promote the stability of being connected between first casing 1 and the second casing 2 like this.

In some embodiments, the second housing 2 includes a first side plate 22 and a second side plate 23 forming the recess 21, the first side plate 22 being disposed adjacent to the interior of the battery pack, the second side plate 23 being disposed away from the interior of the battery pack, the second side plate 23 being higher than the first side plate 22.

It should be noted that, referring to fig. 3 and 4, the inside of the battery pack refers to the area where B is shown in fig. 3, the outside of the battery pack refers to the area where C is shown in fig. 3, the first side plate 22 is disposed near the inside of the battery pack and refers to the side plate near B in the side wall forming the recess 21, and the second side plate 23 is disposed far from the inside of the battery pack and refers to the side plate far from B in the side wall forming the recess 21.

Specifically, the groove 21 is an annular groove 21 formed in the circumferential direction of the second casing 2, the first side plate 22, the second side plate 23 and the bottom wall of the groove 21 form the groove 21, the first side plate 22 is located at one side close to the inside of the battery pack, the second side plate 23 is located at one side far away from the inside of the battery pack, the height of the second side plate 23 is ensured to be higher than that of the first side plate 22, the colloid 3 can flow into the inside of the battery pack from the position of the first side plate 22 when the colloid 3 overflows in the process that the protruding part 11 is inserted into the groove 21, and the colloid 3 is prevented from flowing out of the battery pack from the position of the second side plate 23.

Here, when the protrusion 11 is inserted into the groove 21 filled with the gel 3, since the gel 3 is pushed up along the side plate of the groove 21 by the protrusion 11, the gel 3 is continuously moved up along the side plate of the groove 21 during the continuous insertion of the protrusion 11, which may cause the gel 3 to overflow along the side plate of the groove 21; through second curb plate 23 height is higher than first curb plate 22, and colloid 3 can overflow along first curb plate 22, because first curb plate 22 is located the one side that is close to the battery package inside, then colloid 3 can not overflow to the outside of battery package by second curb plate 23, and this setting can guarantee the cleanness and the aesthetic property of battery package.

In addition, the height of the second side plate 23 can be equal to or smaller than that of the second side plate 23, and the colloid 3 possibly overflows from the second side plate 23 to the outside of the battery pack to influence the appearance of the battery, but the connection of the first shell 1 and the second shell 2 can be realized quickly, so that the installation efficiency is improved. On the basis of the above scheme, a stop block capable of being abutted against the second side plate 23 can be further arranged on the first shell 1 so as to prevent the colloid 3 from flowing out of the second side plate 23, and the external appearance of the battery is improved.

In some embodiments, the first housing 1 is provided with a stopper 12 abutting against a side plate of the groove 21.

Specifically, when the first casing 1 and the second casing 2 are installed together, the limiting block 12 is arranged at the side part of the protruding part 11, the limiting block 12 is also continuously arranged along the circumferential direction of the first casing 1, the limiting block 12 can be abutted with the side plate of the groove 21, and in the curing process of the colloid 3, the limiting block 12 provides supporting force, so that the connection stability of the protruding part 11 and the groove 21 is improved.

The stopper 12 may be disposed on one side of the protruding portion 11, or may be disposed on both sides of the protruding portion 11, that is, the stopper 12 may abut against one of the first side plate 22 or the second side plate 23, or the stopper 12 may abut against both the first side plate 22 and the second side plate 23.

It should be further noted that, in the process of inserting the protrusion 11 into the groove 21 filled with the gel 3, the gel 3 will move upward along the side plate of the groove 21, and the stopper 12 can also play a role in blocking the overflow of the gel 3. The glue 3 may also enter the gap between the limiting block 12 and the side plate of the groove 21, so that the first housing 1 and the second housing 2 are further tightly connected.

In some embodiments, the height of the protruding portion 11 is smaller than the height of the side plate of the groove 21 abutting against the stopper 12.

Here, when the boss 11 is inserted into the groove 21 filled with the gel 3, the height of the boss 11 is smaller than the height of the side plate of the groove 21 abutting against the stopper 12, meaning that there is a gap between the boss end of the boss 11 and the bottom wall of the groove 21. At this time, the protruding portion 11 is not contacted with the bottom wall of the groove 21, the colloid 3 can circulate in the groove 21, and at this time, the protruding portion 11 is not stressed, so that the stability of the connection between the protruding portion 11 and the groove 21 can be improved in the solidifying process of the colloid 3.

In addition, the height of the protruding portion 11 can be equal to the height of the side plate of the groove 21 abutting against the limiting block 12, and the protruding portion 11 can be connected with the groove 21 through the colloid 3 through the arrangement mode.

Further, in some embodiments, the stopper 12 abuts against the second side plate 23.

In this embodiment, an alternative embodiment is provided, where the stopper 12 is perpendicular to the boss 11, and the side plate of the groove 21 is parallel to the boss 11, and the stopper 12 abuts against the side plate of the groove 21 away from the inside of the battery pack, that is, the stopper 12 abuts against the second side plate 23.

Here, the stopper 12 is abutted against the side plate of the groove 21 far from the inside of the battery pack, so that a certain blocking effect can be achieved on the colloid 3; secondly, the contact between the protruding part 11 and the bottom wall of the groove 21 can be avoided, and the stability of the connection between the protruding part 11 and the groove 21 can be improved; thirdly, after the first casing 1 and the second casing 2 are installed, the colloid 3 cannot be seen from the outside of the battery pack, so that the attractiveness of the battery pack is improved.

In addition, the limiting block 12 may also abut against a side plate of the groove 21 near the inside of the battery pack, that is, the limiting block 12 abuts against the first side plate 22.

Still further, in some embodiments, the protruding portions 11 are provided continuously along the circumferential direction of the first casing 1, and the grooves 21 are provided continuously along the circumferential direction of the second casing 2. Specifically, on the basis that bellying 11 sets up on first casing 1 and recess 21 sets up on second casing 2, set up bellying 11 in succession along the circumference of first casing 1, and set up recess 21 in succession along the circumference of second casing 2, when recess 21 and bellying 11 pass through colloid 3 and be connected, so set up, can realize that first casing 1 and second casing 2 are connected, can guarantee the seal that first casing 1 and second casing 2 both are connected again, thereby save to set up the sealing strip between first casing 1 and second casing 2, in addition, also promoted the installation effectiveness between first casing 1 and second casing 2.

The circumferential direction of the first housing 1 refers to a connection position between the first housing 1 and the second housing 2, and this connection position is a circumferential connection position, and the circumferential direction of the second housing 2 refers to a connection position between the second housing 2 and the first housing 1, and this connection position is also a circumferential connection position.

In addition, the protruding portion 11 may be discontinuously disposed in the circumferential direction of the first housing 1, and the recess 21 may be discontinuously disposed in the circumferential direction of the second housing 2, so that the protruding portion 11 and the recess 21 are aligned for connection therebetween. In order to secure connection stability of the first housing 1 and the second housing 2 at this time, a connection member and a sealing member are provided at positions where the protruding portions 11 and the grooves 21 are not provided in the circumferential directions of the first housing 1 and the second housing 2, so that sealing of the connection positions of the first housing 1 and the second housing 2 is achieved. So set up, realize the connection of first casing 1 and second casing 2 through multiple mode, can be when one of them connected mode breaks down, still can guarantee the stability that both are connected to other connected mode, and can promote overall structure's stability, reduce the fault rate.

In some embodiments, the distance between the protruding end portion of the protruding portion 11 and the bottom wall of the recess 21 is L, where 0.1 mm.ltoreq.L.ltoreq.2 mm. Specifically, a gap exists between the protruding end part of the protruding part 11 and the bottom wall of the groove 21, and the colloid 3 is filled in the gap, so that the colloid 3 is filled between the groove 21 and the protruding part 11, the contact area of the groove and the protruding part is increased, the connection of the groove and the protruding part is tighter, and the connection stability of the groove and the protruding part is improved; and so set up, the colloid circulation of bellying 11 both sides, then the colloid height of bellying 11 both sides is the same, and the adhesion force is the same atress equilibrium in bellying 11 both sides, makes bellying 11 and recess 21 bonding's stability better. And the distance L is 0.1 mm.ltoreq.L.ltoreq.2mm, so that the colloid 3 can connect the convex part 11 and the groove 21 more firmly in the range, and the distance between the convex end part of the convex part 11 and the bottom wall of the groove 21 is 0.1mm, 0.3mm, 0.5mm, 0.6mm, 0.8mm, 1mm, 1.5mm and 2mm.

In this example, a preferred embodiment is provided, 0.3 mm.ltoreq.L.ltoreq.0.8 mm.

Furthermore, there is no gap between the protruding end portion of the protruding portion 11 and the bottom wall of the groove 21, i.e., the protruding end portion of the protruding portion 11 abuts against the bottom wall of the groove 21, so that the connection between the protruding portion 11 and the groove 21 can also be achieved to achieve a sealed connection between the first housing 1 and the second housing 2.

In some embodiments, the angle between the boss 11 and the horizontal is P, where P is greater than or equal to 85 and less than or equal to 95; and, the included angle between the second side plate 23 and the horizontal direction is Q, wherein Q is more than or equal to 85 DEG and less than or equal to 95 deg. The horizontal direction is the direction indicated by the double-headed arrow E in fig. 3, and the directions of both the two angles are the angles with the horizontal direction in the clockwise direction.

In this embodiment, an alternative embodiment is provided, where the included angle between the protruding portion 11 and the horizontal direction is the same as the included angle between the second side plate 23 and the horizontal direction, that is, the second side plate 23 and the protruding portion 11 are arranged in parallel, and the corresponding first side plate 22 and the protruding portion 11 are also arranged in parallel, and two pairs of the protruding portions 11 are arranged in parallel, so that the protruding portion 11 is conveniently inserted into the groove 21, so that when the first casing 1 and the second casing 2 are in sealing connection, the colloid 3 is uniformly distributed in the groove 21, and the stress is balanced.

In this embodiment, an alternative embodiment is provided, where the angle between the protruding portion 11 and the horizontal direction is different from the angle between the second side plate 23 and the horizontal direction, and by way of example, P is 85 ° Q and 95 ° or P is 95 ° Q and 85 °, that is, the protruding portion 11 is obliquely disposed with respect to the groove 21, so that the contact area between the protruding portion 11 and the groove 21 and the colloid 3 piece can be increased, and therefore, the bonding stability between the protruding portion 11 and the groove 21 is improved, and further, the connection stability between the first casing 1 and the second casing 2 is improved.

In this embodiment, the first side plate 22 and the second side plate 23 are preferably disposed in parallel, so that the glue 3 in the groove 21 is distributed more uniformly, and the glue 3 is distributed uniformly between the protrusion 11 and the groove 21 after the protrusion 11 is inserted into the groove 21, so as to further improve the stability of connection between the protrusion 11 and the groove 21.

In some embodiments, the first housing 1 is an upper housing and the second housing 2 is a lower housing.

Specifically, the protruding part 11 is arranged in the circumferential direction of the upper shell, the groove 21 capable of accommodating the protruding part 11 is arranged in the circumferential direction of the lower shell, during the installation of the upper shell and the lower shell, firstly, the colloid 3 is injected into the groove 21 of the lower shell, then the protruding part 11 of the upper shell extends into the groove 21 of the lower shell, and after the colloid 3 is solidified, the connection between the upper shell and the lower shell is realized.

By arranging the protruding part 11 in the circumferential direction of the upper case, and arranging the groove 21 capable of accommodating the protruding part 11 in the circumferential direction of the lower case, the colloid 3 is injected into the groove 21, and the upper case and the lower case can be quickly installed without inverting the battery pack in the installation process of the upper case and the lower case.

In addition, the protruding part 11 may be further disposed in the circumferential direction of the lower case, the groove 21 capable of accommodating the protruding part 11 may be disposed in the circumferential direction of the upper case, the upper case may be inverted first during the installation of the upper case and the lower case, then the colloid 3 may be injected into the groove 21 of the upper case, then the protruding part 11 of the lower case may be inserted into the groove 21 of the upper case, and after the colloid 3 is solidified, the battery pack may be rotated and aligned, thereby realizing the connection between the upper case and the lower case.

In some embodiments, one of the first housing 1 and the second housing 2 is provided with a buckle (not shown in the figure), and the other is provided with a clamping block (not shown in the figure) that is clamped with the buckle. Specifically, in the process of installing the first shell and the second shell, the buckling and the clamping block are clamped to achieve the pre-positioning between the first shell and the second shell, so that the convenience of connection of the first shell and the second shell is improved.

In this embodiment, an alternative implementation manner is provided, in which a buckle is provided on the first housing 1, and a clamping block that is clamped with the buckle is provided on the second housing 2.

In this embodiment, an alternative implementation manner is provided, in which a buckle is provided on the second housing 2, and a clamping block that is clamped with the buckle is provided on the first housing 1.

In addition, a first buckle can be further arranged on the first shell 1, a first clamping block clamped with the first buckle is arranged on the second shell 2, a second buckle is arranged on the second shell 2, and a second clamping block clamped with the second buckle is arranged on the first shell 1.

In some embodiments, the outer surface of the boss 11 is provided with serrations.

By arranging saw teeth on the outer surface of the protruding portion 11, the contact area between the protruding portion 11 and the colloid 3 is increased, and therefore the stability of connection of the protruding portion 11 and the groove 21 through the colloid 3 is improved.

Here, the outer surface of the boss 11 may also be provided with a drop-like boss, a square-like boss, or the like.

In some embodiments, the outer surface of the boss 11 is provided with threads.

By arranging threads on the outer surface of the protruding portion 11, the contact area between the protruding portion 11 and the colloid 3 is increased, and therefore the stability of connection of the protruding portion 11 and the groove 21 through the colloid 3 is improved.

In some embodiments, the boss 11 is trapezoidal in cross-section.

Specifically, the cross section of the boss 11 is a trapezoid structure, and the side length of the trapezoid near the bottom of the groove 21 is longer than the side length of the trapezoid far from the bottom of the groove 21. By the arrangement, the contact area of the colloid 3 in the convex part 11 and the concave groove 21 can be increased, and the bonding strength of the concave groove 21 and the convex part 11 can be improved; and because the side length of the trapezoid close to the bottom of the groove 21 is larger than the side length of the trapezoid far away from the bottom of the groove 21, the movement of the protruding portion 11 relative to the groove 21 after solidification can be avoided, and the stability of the connection of the protruding portion 11 and the groove 21 through the colloid 3 is further improved.

In addition, the boss 11 may have a structure such as a truncated cone, in which the dimension near the bottom of the recess 21 is large and the dimension far from the bottom of the recess 21 is small. The cross section of the boss 11 may also be rectangular.

The basic principles of the present application have been described above in connection with specific embodiments, but it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are merely examples and not intended to be limiting, and these advantages, benefits, effects, etc. are not to be construed as necessarily possessed by the various embodiments of the application. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the application is not necessarily limited to practice with the above described specific details.

The block diagrams of the devices, apparatuses, devices, systems referred to in the present application are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, apparatuses, devices, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.

It is also noted that in the apparatus, devices and methods of the present application, the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present application.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

It should be understood that the terms "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are used for more clearly describing the technical solutions, and are not intended to limit the scope of the present application.

The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the application to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.

Claims (10)

1. A battery pack, comprising:

A first housing provided with a boss;

a second housing provided with a groove accommodating the boss;

The groove is internally provided with a colloid, and the protruding part is connected with the groove through the colloid so as to realize the connection of the first shell and the second shell.

2. The battery pack of claim 1, wherein the second housing includes a first side plate and a second side plate forming the recess, the first side plate being disposed proximate the battery pack interior, the second side plate being disposed distal the battery pack interior, the second side plate being higher than the first side plate.

3. The battery pack according to claim 2, wherein the first housing is provided with a stopper abutting against a side plate of the groove.

4. The battery pack of claim 3, wherein the stopper abuts the second side plate.

5. The battery pack according to claim 1, wherein the convex portions are provided continuously in the circumferential direction of the first housing, and the concave grooves are provided continuously in the circumferential direction of the second housing.

6. The battery pack of claim 5, wherein a distance between the protruding end of the protruding portion and the bottom wall of the recess is L, wherein 0.1mm ∈l ∈2mm.

7. The battery pack of claim 2, wherein the battery pack comprises a plurality of battery cells,

The included angle between the protruding part and the horizontal direction is P, wherein P is more than or equal to 85 degrees and less than or equal to 95 degrees; and, in addition, the method comprises the steps of,

And the included angle between the second side plate and the horizontal direction is Q, wherein Q is more than or equal to 85 degrees and less than or equal to 95 degrees.

8. The battery pack according to claim 1, wherein one of the first housing and the second housing is provided with a buckle, and the other is provided with a locking block locked with the buckle.

9. The battery pack according to claim 1, wherein the outer surface of the boss is provided with serrations or threads.

10. The battery pack of claim 1, wherein the first housing is an upper housing and the second housing is a lower housing.