CN219303870U

CN219303870U - Battery pack

Info

Publication number: CN219303870U
Application number: CN202320137446.3U
Authority: CN
Inventors: 丁扬; 魏江鹏; 蒋豪
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2023-01-18
Filing date: 2023-01-18
Publication date: 2023-07-04
Anticipated expiration: 2033-01-18

Abstract

The application relates to a battery pack, and relates to the field of battery technology, comprising a cover plate, a support and a buckle; the cover plate comprises a connecting side wall, wherein the connecting side wall comprises a first part, a second part and a third part which are sequentially arranged along the length direction of the connecting side wall; wherein the third portion and the first portion are arranged at intervals along the thickness direction of the connecting side wall; the third part is clamped with the support through the buckle; the end part of the joint of the second part and the first part forms an obtuse angle with the first part; and the end part of the joint of the second part and the third part forms an obtuse angle with the third part. The first part and the third part are transited through the inclined second part, so that the effect of improving the structural stability of the connecting side wall is achieved.

Description

Battery pack

Technical Field

The present application relates to the field of battery technology, and in particular, to a battery pack.

Background

The battery pack comprises single batteries, end plates, side plates and cover plates; after arranging a plurality of single batteries, two end plates and side plates are used for enclosing a frame body to fix the plurality of batteries, a cover plate is covered above the plurality of single batteries to cover the single batteries, and the cover plate is fixedly connected with the end plates. Wherein, through support fixed connection between apron and the end plate, the support is fixed on the end plate, and the lateral wall of apron passes through the buckle with the support to be connected.

The side wall of the cover plate connected with the support through the buckle is of a ladder structure; when the cover plate is installed, the step of the cover plate is easy to tear.

Disclosure of Invention

The application provides a battery pack, which has the stability of improving the structure of a connecting side wall.

The application provides a battery pack, which comprises a cover plate, a support and a buckle; the cover plate comprises a connecting side wall, wherein the connecting side wall comprises a first part, a second part and a third part which are sequentially arranged along the length direction of the connecting side wall; wherein the third portion and the first portion are arranged at intervals along the thickness direction of the connecting side wall; the third part is clamped with the support through the buckle; the end part of the joint of the second part and the first part forms an obtuse angle with the first part; and the end part of the joint of the second part and the third part forms an obtuse angle with the third part.

In the technical scheme, the first part and the third part are connected by using the inclined second part, the connecting side wall is in smooth transition at the step position, when the third part is clamped with the support, the third part drives the second part to generate relatively smaller deformation, and the risk that the second part is torn is reduced, so that the stability of the self structure of the connecting side wall is improved.

Drawings

FIG. 1 is a schematic view of the structure of a support and cover connection in one embodiment;

FIG. 2 is a schematic cross-sectional view of a second portion of the connecting sidewall in one embodiment;

FIG. 3 is a schematic cross-sectional view of a prior art connecting sidewall;

FIG. 4 is a schematic cross-sectional view of an arcuate transition connecting a second portion of a sidewall to first and third portions in one embodiment;

FIG. 5 is a schematic cross-sectional view of an exemplary embodiment of an arcuate transition connecting a second portion of a sidewall to a first portion and a third portion;

FIG. 6 is a schematic view of the structure of the connection of the side wall and the cover plate in one embodiment.

1. A cover plate; 2. connecting the side walls; 21. a first portion; 22. a second portion; 23. a third section; 3. a support; 4. a buckle; 41. a male buckle; 42. a female buckle; 5. a sidewall.

Detailed Description

The present application is further described in detail below by way of the accompanying drawings and examples. The features and advantages of the present application will become more apparent from the description.

The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not collide with each other.

The embodiment of the application discloses a battery pack, including battery cell, end plate, curb plate, support and apron. A plurality of battery cells are arranged to form a group of batteries, two side plates are respectively placed at two ends of the width of the group of batteries one by one, two end plates are respectively placed at two ends of the length of the group of batteries one by one, and two ends of the two end plates are respectively fixed with two side walls to compress the group of batteries.

In this embodiment, the support is fixedly connected with the end plate in a plugging manner, and the cover plate is buckled above the single battery and then is connected with the support in a clamping manner.

Referring to fig. 1, in this embodiment, a cover plate 1 includes a connecting sidewall 2, and the connecting sidewall 2 is a sidewall where the cover plate 1 is clamped to a support 3. In this embodiment, only one connecting sidewall 2 is clamped with the support 3, and the connection between the other end plate and the cover plate 1 is determined according to design requirements.

Referring to fig. 2, the connecting sidewall 2 includes a first portion 21, a second portion 22, and a third portion 23 sequentially disposed along a length direction of the connecting sidewall 2; wherein the third portion 23 and the first portion 21 are disposed at intervals in the thickness direction of the connecting sidewall 2; the third portion 23 is clamped with the support 3 by the buckle 4.

Specifically, the connecting side wall 2 is a rectangular side wall which is arranged at one end along the length direction of the connecting side wall and is sunken towards the inner cavity of the cover plate 1. The first portion 21 and the third portion 23 are disposed in parallel, the second portion 22 is located between the first portion 21 and the third portion 23, and the first portion 21 and the third portion 23 are connected and fixed by the second portion 22.

Illustratively, the first portion 21, the second portion 22, and the third portion 23 are each a plate structure. Optionally, the first portion 21, the second portion 22 and the third portion 23 are provided with reinforcing ribs. Illustratively, the first portion 21, the second portion 22, and the third portion 23 are integrally injection molded. Optionally, the first portion 21, the second portion 22 and the third portion 23 are heat-fused.

As an alternative, the third portion 23 is a portion of the connecting sidewall 2 recessed toward the inner cavity of the cover plate 1. Specifically, the gap between the third portion 23 and the side wall opposite to the connecting side wall 2 is smaller than the gap between the first portion 21 and the side wall opposite to the connecting side wall 2.

When the third portion 23 is connected with the support 3 through the buckle 4, the buckle 4 protrudes from the third portion 23 along the thickness direction of the connecting sidewall 2, but does not protrude from the first portion 21, so that after the connecting sidewall 2 is clamped with the support 3, the outermost surface of the connecting sidewall 2 is the outer side surface of the first portion 21.

For convenience of description, a first direction, a second direction and a third direction are defined, wherein the first direction is a length direction of the connecting sidewall 2, the second direction is a thickness direction of the connecting sidewall 2, and the third direction is a capping direction when the connecting sidewall 2 is clamped with the support 3. In the drawings, a first direction is denoted as X direction, a second direction is denoted as Y direction, and a third direction is denoted as Z direction.

Referring to fig. 2, the end of the second portion 22 where it joins the first portion 21 forms an obtuse angle with the first portion 21; and the end of the connection between the second part 22 and the third part 23 forms an obtuse angle with the third part 23.

Specifically, in the drawings, the end of the second portion 22 where it joins the first portion 21 is denoted as angle a with the first portion 21, and the end of the second portion 22 where it joins the third portion 23 is denoted as angle b with the third portion 23.

Referring to fig. 3, in the prior art, a step structure is used for a side wall 5 connected with a support, when the side wall is clamped with the support, the side wall 5 is deformed, and because the side wall 5 is thinner, the side wall 5 is easy to break during installation, and the product stability is not high; meanwhile, the side wall 5 of the step structure has poor fluidity at the step position when the side wall 5 is injection molded.

Since the angles a, b are obtuse angles, when the connecting side wall 2 is injection molded, liquid material easily flows at the connection between the second portion 22 and the first portion 21 and between the second portion 22 and the third portion 23, facilitating the molding of the connecting side wall 2. Due to the inclination between the second portion 22 and the first portion 21 and the inclination between the second portion 22 and the third portion 23, the third portion 23 is more easily deformed when engaged with the abutment 3, compared to a stepped structure, reducing the risk of tearing the second portion 22 when the connecting side wall 2 is engaged with the abutment 3.

Referring to fig. 2, as an alternative, the angle between the second portion 22 and the third portion 23 is between 100 ° and 160 °.

Illustratively, the angle a is 120 °, alternatively, the angle a is 100 °, 110 °, 134 °, 146 °, 155 °, 160 °. The angle a is determined by simulation analysis according to the material, thickness and length of the connecting sidewall 2 in the third direction.

As an alternative, the third portion 23 is parallel to the first portion 21. Specifically, the third portion 23 and the first portion 21 are both plate structures, and the included angle between the angle a and the angle b is equal.

The two ends of the second portion 22 are stressed in equilibrium, further reducing the risk of tearing the second portion 22 when the connecting side wall 2 is mounted.

Referring to fig. 2, as an alternative, the second portion 22 is a flat plate having both ends connected to the third portion 23 and the first portion 21, respectively, and the second portion 22 is disposed obliquely with respect to the third portion 23.

Specifically, the first portion 21 and the third portion 23 are both in a flat plate structure, and two ends of the flat plate disposed obliquely are respectively connected with the first portion 21 and the second portion 22. Here, the angle a is the angle between the first portion 21 and the second portion 22, and the angle b is the angle between the third portion 23 and the second portion 22.

In this embodiment, the connection of the second portion 22 with the first portion 21 and the third portion 23 is provided with a process chamfer, which is only the chamfer necessary for the connection of the side walls 2 for the realization of the machining.

The second portion 22 of the planar structure facilitates the forming of the second portion 22.

Referring to fig. 4, as an alternative, the junction of the second portion 22 with the first portion 21 is provided with a rounded transition; and/or the junction of the second portion 22 and the third portion 23 is provided with a rounded transition.

Specifically, a rounded transition is arranged at the connection of the second part 22 and the first part 21; the junction of the second portion 22 and the third portion 23 is provided with a rounded transition. The size of the rounded corners is larger than the technological rounded corners connecting the side walls 2.

By the arrangement of the rounded corners, the sizes of the angle a and the angle b are increased correspondingly, so that the angle a is larger than the included angle between the first part 21 and the second part 22; such that the angle b is greater in size than the angle of the third portion 23 with the second portion 22. When the third part 23 is clamped with the support 3, the acting force born by the second part 22 is more balanced, so that the risk of tearing the second part 22 is reduced; and further facilitates the flow of liquid material in the injection mould during injection moulding of the connecting side walls 2.

In other embodiments, a rounded transition is provided at the junction of the second portion 22 and the first portion 21, and an obtuse angle bend transition is provided at the junction of the second portion 22 and the third portion 23. In other embodiments, a rounded transition is provided at the junction of the second portion 22 and the third portion 23, and an obtuse angle bend transition is provided at the junction of the second portion 22 and the first portion 21.

Referring to fig. 4, as an alternative, the two rounded corners at both ends of the second portion 22 are equal in size.

Specifically, the rounded corners at the two ends of the second portion 22 are equal, and the structures at the two ends of the second portion 22 are symmetrical.

The uniformity of the force applied to the second portion 22 during deformation and the fluidity of the liquid material during the formation of the connecting side wall 2 can be further improved.

In other embodiments, the rounded corners of the connection ends of the second portion 22 and the first portion 21 are smaller than the rounded corners of the connection ends of the second portion 22 and the third portion 23. In other embodiments, the rounded corner of the connection end of the second portion 22 and the first portion 21 is greater than the rounded corner of the connection end of the second portion 22 and the third portion 23.

Referring to fig. 5, as an alternative, two rounded opposite ends intersect.

Specifically, the whole second portion 22, the connection ends of the first portion 21 and the second portion 22, and the connection ends of the third portion 23 and the second portion 22 are all arc-shaped, the first portion 21 and the third portion 23 are smoothly transited, and the change rates of the slopes in the transition are equal.

Further improving the uniformity of the force applied by the second portion 22 during deformation and improving the flowability of the liquid material during formation of the connecting sidewall 2.

In other embodiments, the second portion 22 is a bending plate with two ends connected to the third portion 23 and the first portion 21 respectively; the bending plate has a number of bends in a first direction of the connecting side wall 2 and a number of bends in a second direction of the connecting side wall 2.

In other embodiments, the second portion 22 is a circular arc plate, and the central angle of the second portion 22 is smaller than 90 °. Optionally, the second portion 22 corresponds to a central angle of 45 °.

Referring to fig. 1, as an alternative, the support 3 is provided with an external side cooperating with the second portion 22.

In particular, one of the sides of the support 3 is correspondingly matched to the connecting side wall 2, so that it corresponds to each of the first portion 21, the second portion 22 and the third portion 23.

Because support 3 cooperates with second portion 22, connect the lateral wall 2 with support 3 joint after, connect the lateral wall 2 and receive the effort on can be relatively even transmission to support 3, reduce the in-process of using, connect the risk of lateral wall 2 damage.

In a further embodiment, one of the sides of the support 3 corresponds in a matching manner to the first portion 21 and to the third portion 23 of the connecting side wall 2, the position of the side corresponding to the second portion 22 being provided as a step.

Referring to fig. 6, as an alternative, the buckle 4 includes a pin 41 and a box 42, the box 42 being provided at the third portion 23, the pin 41 being fixed to the holder 3.

Specifically, the male buckle 41 is a protrusion disposed on a side wall of the support 3, the cross section of the protrusion is similar to an L shape, and the male buckle 41 and the support 3 are integrally formed. The female buckle 42 is a square hole formed in the third portion 23, and the female buckle 42 is integrally formed with the connecting side wall 2 when the side wall 2 is connected.

In use, the connecting side wall 2 is deformed, and the male buckle 41 passes through the female buckle 42, so that the third part 23 is connected with the buckle 4 of the support 3.

Referring to fig. 6, as an alternative, the pin 41 does not protrude beyond the end of the holder 3 at the position of the holder 3.

Specifically, the male buckle 41 is integrally located at a side wall portion of the holder 3, the ends of the holder 3 are both ends of the holder 3 in the third direction, and the male buckle 41 is located in an area between both ends of the holder 3 in the third direction.

The height of the pin 41 in the third direction on the holder 3 can be reduced on the one hand, and on the other hand, the height in the third direction through the holder 3 can be increased, so that the holder 3 is prevented from protruding out of the upper end of the holder 3.

Before the male buckle 41 is installed, the male buckle is not easy to be broken by accidental collision; when the male buckle 41 is connected with the support 3, the male buckle 41 is not easy to break; after the male buckle 41 is connected with the connecting side wall 2, the acting force applied to the male buckle 41 by the connecting side wall 2 makes the moment generated by the male buckle 41 relatively smaller, and the male buckle 41 is not easy to break.

Referring to fig. 1, as an alternative, the distance of the catch 4 from the end of the third portion 23 remote from the second portion 22 is equal to the design clearance of the catch 4.

Specifically, the pin 41 is located at the end of the third portion 23 remote from the second portion, and the gap is designed to be the minimum distance allowed by the position of the pin 41 on the support 3 from the edge of the support 3.

The farther the buckle 4 is from the second part 22, the smaller the deformation of the third part 23 driven by the forced deformation of the third part 23 to drive the second part 22 is, the smaller the deformation of the second part 22 is, and the less easily the second part 22 is torn.

In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", etc. are based on the directions or positional relationships in the working state of the present application, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In the description of the present application, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, unless explicitly specified and limited otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

The present application has been described in connection with the preferred embodiments, but these embodiments are merely exemplary and serve only as illustrations. On the basis of this, many alternatives and improvements can be made to the present application, which fall within the scope of protection of the present application.

Claims

1. The battery pack is characterized by comprising a cover plate, a support and a buckle;

the cover plate comprises a connecting side wall, wherein the connecting side wall comprises a first part, a second part and a third part which are sequentially arranged along the length direction of the connecting side wall; wherein,,

the third part and the first part are arranged at intervals along the thickness direction of the connecting side wall;

the third part is clamped with the support through the buckle;

the end part of the joint of the second part and the first part forms an obtuse angle with the first part; and the end part of the joint of the second part and the third part forms an obtuse angle with the third part.

2. The battery pack according to claim 1, wherein the second portion is a flat plate having both ends connected to the third portion and the first portion, respectively, and the second portion is disposed obliquely with respect to the third portion.

3. The battery of claim 2, wherein a rounded transition is provided at the junction of the second portion and the first portion;

and/or the connection part of the second part and the third part is provided with a rounded transition.

4. A battery according to claim 3, wherein two of said rounded opposite ends intersect.

5. The battery of claim 2, wherein the second portion is at an angle between 100 ° and 160 ° to the third portion.

6. The battery of claim 1, wherein the third portion is parallel to the first portion.

7. The battery of claim 1, wherein the third portion is a portion of the connecting sidewall recessed toward the cover cavity.

8. The battery according to any one of claims 1 to 7, wherein the support is provided with an outer side surface that cooperates with the second portion.

9. The battery of claim 8, wherein the clasp comprises a pin and a box, the box being disposed on the third portion, the pin being secured to the support.

10. The battery of claim 9, wherein the male buckle does not protrude from an end of the holder at the position of the holder.