CN219498007U

CN219498007U - Battery pack

Info

Publication number: CN219498007U
Application number: CN202320220020.4U
Authority: CN
Inventors: 柯亨钊; 李帅
Original assignee: Zhejiang Lera New Energy Power Technology Co Ltd
Current assignee: Zhejiang Lera New Energy Power Technology Co Ltd
Priority date: 2023-01-17
Filing date: 2023-01-17
Publication date: 2023-08-08
Anticipated expiration: 2033-01-17

Abstract

The application discloses battery pack, including the shell and set up the electric core subassembly in the shell, electric core subassembly includes skeleton and a plurality of electric cores of installing on the skeleton, and the skeleton has along the relative first end of length direction and second end, and first end has first joint portion, and the second end has first connecting portion; the shell includes casing and the lid of detachably installation on casing down, and the casing includes the bottom plate and around the bottom plate all around and along the lateral wall that thickness direction extends down, has the second joint portion that corresponds with first joint portion and the second connecting portion that corresponds with first connecting portion on the lateral wall, and second joint portion and first joint portion block are in order to restrict the displacement of electric core subassembly along thickness direction, and second connecting portion passes through the connecting piece with first connecting portion and is connected in order to fix electric core subassembly and casing down.

Description

Battery pack

Technical Field

The application relates to the technical field of battery packs.

Background

Based on portable use requirements, more and more electric tools employ lithium ion battery packs as a power source. Meanwhile, in order to extend the endurance time, the battery pack is required to have a large electric capacity, that is, a plurality of electric cells are required to be arranged in the battery pack, and how to compactly and conveniently install the plurality of electric cells in the housing of the battery pack is a problem to be solved by those skilled in the art.

Disclosure of Invention

An object of the present application is to provide a battery pack with compact internal structure and convenient cell installation.

To achieve the above object, the present application provides a battery pack including a housing and a battery cell assembly disposed in the housing,

the battery cell assembly comprises a framework and a plurality of battery cells arranged on the framework, wherein the framework is provided with a first end and a second end, the first end is provided with a first clamping part, and the second end is provided with a first connecting part;

the shell comprises a lower shell body and a cover body detachably mounted on the lower shell body, the lower shell body comprises a bottom plate and side walls surrounding the periphery of the bottom plate and extending along the thickness direction, the side walls are provided with second clamping parts corresponding to the first clamping parts and second connecting parts corresponding to the first connecting parts, the second clamping parts are clamped with the first clamping parts to limit the displacement of the battery cell assembly along the thickness direction, and the second connecting parts are connected with the first connecting parts through connecting pieces to fix the battery cell assembly and the lower shell body.

Further, the second clamping portion protrudes out of the side wall, and the first clamping portion is concave inwards relative to the end face of the first end, so that when the battery cell assembly is mounted on the lower shell, the second clamping portion extends to the inner side of the first end and is located above the first clamping portion.

Further, the second connecting portion protrudes from the side wall, the first connecting portion is stacked on the second connecting portion in the thickness direction, and the connecting member passes through the first connecting portion and the second connecting portion to connect the two.

Further, the first clamping portion comprises a first limiting part and two side plates, the first limiting part extends towards the direction of the side wall, the first limiting part is located between the two side plates and connected with the two side plates, the height of the two side plates is larger than that of the first limiting part, the second clamping portion is located above the first limiting part and located between the two side plates, and at least one end face of the side plate abuts against the side wall.

Further, the second clamping portion comprises a second limiting piece extending from the side wall to the direction of the battery cell assembly, the end face of the second limiting piece facing the battery cell assembly extends downwards obliquely to the direction of the side wall to form a guide surface, and when the battery cell assembly is installed, the first clamping portion is suitable for moving downwards obliquely along the guide surface.

Further, the second clamping portion further comprises a reinforcing piece for connecting the second limiting piece and the side wall, and the reinforcing piece is located above the second limiting piece.

Further, the cross section of the reinforcement is T-shaped.

Further, the first clamping portion comprises a first limiting piece extending towards the direction of the side wall, and the first limiting piece is located below the second limiting piece.

Further, the battery cell assembly comprises a plurality of battery cells, the battery cells are arranged in parallel along the length direction, and the first end and the second end are two opposite ends of the framework along the length direction.

Further, the first end of skeleton is provided with two first joint portion, two first joint portion sets up with keeping away from each other the both sides of first end, the second end is provided with two first connecting portion, two first connecting portion set up with keeping away from each other the both sides of second end, have on the lateral wall respectively with two second joint portion that first joint portion corresponds and two respectively with two second connecting portion that first connecting portion corresponds.

Compared with the prior art, the beneficial effect of this application lies in: the assembled efficiency of the group battery of this application is high, and internal structure is compact, is favorable to reducing the volume of battery package.

Drawings

FIG. 1 is a schematic view of one embodiment of a battery pack of the present application;

FIG. 2 is a partial schematic view of one embodiment of a battery pack of the present application, wherein the cover is not shown;

FIG. 3 is an exploded view of one embodiment of a battery pack of the present application, wherein the cover is not shown;

FIG. 4 is a top view of one embodiment of a battery pack of the present application, wherein the cover is not shown;

FIG. 5 is a cross-sectional view taken along section A-A of FIG. 4;

FIG. 6 is a schematic view of one embodiment of a framework of the present application;

FIG. 7 is a schematic view of one embodiment of a lower housing of the present application;

FIG. 8 is a schematic view of the cell assembly mounted in the lower housing with the cell assembly mounted in an inclined orientation;

FIG. 9 is a cross-sectional view of FIG. 8;

in the figure: 1. a cell assembly; 11. a skeleton; 101. a first end; 102. a second end; 111. a first clamping part; 1111. a first limiting member; 1112. a side plate; 112. a first connection portion; 12. a battery cell; 2. a housing; 21. a lower housing; 201. a bottom plate; 202. a sidewall; 211. a second clamping part; 2111. a second limiting piece; 2110. a guide surface; 2112. a reinforcing member; 2112a, a first reinforcement; 2112b, a second reinforcement; 212. a second connecting portion; 22. a cover body; 3. a connecting piece; 4. a circuit board; 5. an electrical interface.

Detailed Description

The present application will be further described with reference to the specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.

It should be noted that the terms "first," "second," and the like in the description and in the claims of the present application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

The terms "comprises" and "comprising," along with any variations thereof, in the description and claims of the present application are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1-7, the present application provides a battery pack comprising a housing 2 and a cell assembly 1 disposed within the housing 2. The battery cell assembly 1 comprises a framework 11 and a plurality of battery cells 12 arranged on the framework 11, wherein the framework 11 is provided with a first end 101 and a second end 102, the first end 101 is provided with a first clamping part 111, and the second end 102 is provided with a first connecting part 112. The housing 2 includes a lower case 21 and a cover 22 detachably mounted on the lower case 21, the lower case 21 includes a bottom plate 201 and a side wall 202 surrounding the bottom plate 201 and extending in a thickness direction, and the cover 22 is detachably connected to the side wall 202. The side wall 202 has a second engaging portion 211 corresponding to the first engaging portion 111 and a second connecting portion 212 corresponding to the first connecting portion 112. The first clamping portion 111 of the skeleton 11 is clamped with the second clamping portion 211 of the lower housing 21 to limit the displacement of the battery cell assembly 1 along the thickness direction, and the first connecting portion 112 of the skeleton 11 is connected with the second connecting portion 212 of the lower housing 21 through the connecting piece 3 to fix the battery cell assembly 1 and the lower housing 21.

When the battery pack is assembled, the plurality of battery cells 12 are firstly arranged on the framework 11 to form the integral battery cell assembly 1, then the battery cell assembly 1 is arranged in the lower shell 21, and finally the cover 22 is arranged on the lower shell 21. In addition, when the battery cell assembly 1 is installed in the lower housing 21, the first clamping portion 111 and the second clamping portion 211 are clamped first, then the first connecting portion 112 and the second connecting portion 212 are connected through the connecting piece, the clamped installation mode is simple and fast, the assembly efficiency is improved, the stability of installation can be improved when the first connecting portion 112 and the second connecting portion 212 are connected through the connecting piece, and the battery cell assembly 1 is prevented from being easily separated from the lower housing 21.

In some embodiments, the first end 101 and the second end 102 are opposite ends of the skeleton 11 along the length direction, which is beneficial to simplifying the structure of the skeleton 11 along the width direction, and further beneficial to reducing the width of the skeleton 11.

Further, the second clamping portion 211 protrudes from the side wall 202, and the first clamping portion 111 is concave relative to the end surface of the first end 101 of the frame 11, so that when the frame 11 is mounted on the lower housing 21, the second clamping portion 211 extends to the inner side of the first end 101 and is located above the first clamping portion 112. In some embodiments, the end surface of the first end 101 may abut against the side wall 202 to limit the displacement of the battery cell assembly 1 along the length direction, so that the volume of the battery pack is reduced, and the internal structure of the battery pack is more compact.

Further, the second connecting portion 212 protrudes from the side wall 202, the second connecting portion 212 has a second connecting hole, the first connecting portion 112 is stacked on the second connecting portion 212 along the thickness direction, the first connecting portion 112 has a first connecting hole corresponding to the second connecting hole, and the connecting member 3 is adapted to be screwed to the first connecting hole and the second connecting hole to connect the first connecting portion 112 with the second connecting portion 212.

Further, as shown in fig. 6, the first clamping portion 111 includes a first limiting member 1111 extending toward the side wall 202 and two side plates 1112, the first limiting member 1111 is located between the two side plates 1112 and connected to the two side plates 1112, the height of the two side plates 1112 is greater than the height of the first limiting member 1111, and the second clamping portion 211 is located above the first limiting member 1111 and between the two side plates 1112. The side plate 1112 can play a role of reinforcing the first stopper 111, and can also cooperate with the second clamping portion 211 to restrict displacement of the cell assembly 1 in the width direction.

The end surface of at least one side plate 1112 forms the end surface of the first end 101, that is, the end surface of at least one side plate 1112 abuts against the side wall 202, so that the displacement of the cell assembly 1 in the length direction is limited by the cooperation of the side plate 1112 and the side wall 202.

Preferably, both side plates 1112 abut the side wall 202.

Further, as shown in fig. 7, the second clamping portion 211 includes a second limiting member 2111 extending from the side wall 202 toward the cell assembly 1, and the end surface of the second limiting member 2111 facing the cell assembly 1 extends obliquely downward toward the side wall 202 to form a guiding surface 2110, so that when the cell assembly 1 is mounted obliquely, the first limiting member 1111 of the first clamping portion 111 is adapted to move along the guiding surface 2110 to the lower side of the second limiting member 2111.

It should be noted that, in the present embodiment, the cooperation between the first clamping portion 111 and the second clamping portion 211 only limits the upward movement of the battery cell assembly 1 along the thickness direction, and the downward displacement of the battery cell assembly 1 along the thickness direction can be limited by the circuit board 4 located between the battery cell assembly 1 and the bottom board 201, and also can be limited by the limiting member disposed on the bottom board 201.

Further, as shown in fig. 7, the second clamping portion 211 further includes a reinforcing member 2112 connecting the second limiting member 2111 and the side wall 202, the reinforcing member 2112 is located above the second limiting member 2111, and the cross section of the reinforcing member 2112 is T-shaped. Specifically, the reinforcement 2112 includes a first reinforcement portion 2112a extending upward from an end of the second stopper 2111, and a second reinforcement portion 2112b connecting the first reinforcement portion 2112a and the side wall 202.

It will be appreciated that, when assembled, the first stop 1111 is located below the second stop 2111 and the first connection 112 is located above the second connection 212. When the battery cell assembly 1 is mounted in the lower case 21, as shown in fig. 8 and 9, the battery cell assembly 1 is tilted so that the first stopper 1111 of the first end 101 of the frame 11 enters below the second stopper 2111 of the lower case 21, then the battery cell assembly 1 is laid down so that the first connection portion 112 of the second end 102 of the frame 11 is stacked above the second connection portion 212 of the lower case 21, and then the first connection portion 112 and the second connection portion 212 are connected.

In some embodiments, the first end 101 of the skeleton 11 is provided with two first clamping portions 111, the two first clamping portions 111 are disposed at two sides of the first end 101 away from each other, the second end 102 is provided with two first connecting portions 112, the two first connecting portions 112 are disposed at two sides of the second end 102 away from each other, and similarly, the side wall 202 is provided with two second clamping portions 211 corresponding to the two first clamping portions 111 respectively, and two second connecting portions 212 corresponding to the two first connecting portions 112 respectively.

Further, the two first clamping portions 111 and the two first connecting portions 112 are respectively located at four corners of the skeleton 11, the two second clamping portions 211 and the two second connecting portions 212 are respectively located at four corners of the side wall 202, so that the four corners of the battery cell assembly 1 and the lower housing 21 are fixed, and the installation stability is further improved.

In some embodiments, several cells 12 are arranged side-by-side along the length.

It should be noted that the battery pack further includes a circuit board 4 and an electrical interface 5, the circuit board 4 is disposed between the battery cell assembly 1 and the bottom board 201, the electrical interface 5 is disposed at one end of the circuit board 4 and is close to the side wall 202, the circuit board 4 is electrically connected with the battery cell assembly 1, and the electrical interface 5 is electrically connected with the circuit board 4. The side wall 202 has electrical through holes corresponding to the electrical interfaces 5 to allow external connectors to be connected to the electrical interfaces 5 through the electrical through holes.

In one embodiment of the present application, the electrical through hole and the second clamping portion 211 are located in the same plane, and the electrical through hole is located below the second clamping portion 211.

The foregoing has outlined the basic principles, main features and advantages of the present application. It will be appreciated by persons skilled in the art that the present application is not limited to the embodiments described above, and that the embodiments and descriptions described herein are merely illustrative of the principles of the present application, and that various changes and modifications may be made therein without departing from the spirit and scope of the application, which is defined by the appended claims. The scope of protection of the present application is defined by the appended claims and equivalents thereof.

Claims

1. A battery pack comprises a shell and a battery cell assembly arranged in the shell, and is characterized in that,

2. The battery pack of claim 1, wherein the second clamping portion protrudes from the side wall, the first clamping portion is recessed relative to an end surface of the first end, and the second clamping portion extends to an inner side of the first end and is located above the first clamping portion when the battery cell assembly is mounted on the lower housing.

3. The battery pack according to claim 2, wherein the second connection part protrudes from the side wall, the first connection part is stacked on the second connection part in a thickness direction, and the connection member passes through the first connection part and the second connection part to connect the two.

4. The battery pack according to any one of claims 1 to 3, wherein the first clamping portion includes a first stopper and two side plates extending in a direction of the side wall, the first stopper is located between and connected to the two side plates, and a height of the two side plates is greater than a height of the first stopper, so that the second clamping portion is located above the first stopper and between the two side plates, and an end face of at least one side plate abuts against the side wall.

5. A battery pack as claimed in any one of claims 1 to 3, wherein the second clamping portion comprises a second limiting member extending from the side wall in the direction of the cell assembly, the end surface of the second limiting member facing the cell assembly extending obliquely downwards in the direction of the side wall to form a guide surface, so that the first clamping portion is adapted to move obliquely downwards along the guide surface when the cell assembly is mounted.

6. The battery pack of claim 5, wherein the second clamping portion further comprises a reinforcement connecting the second stop member and the side wall, the reinforcement being located above the second stop member.

7. The battery pack of claim 6, wherein the stiffener has a T-shaped cross section.

8. The battery pack of claim 5, wherein the first snap-fit portion includes a first stop extending in a direction of the side wall, the first stop being located below the second stop.

9. The battery pack of claim 1, wherein the cell assembly comprises a plurality of the cells, each of the cells being disposed in a side-by-side relationship along a length, the first end and the second end being opposite ends of the frame along the length.

10. The battery pack according to claim 1, wherein the first end of the frame is provided with two first clamping portions, the two first clamping portions are disposed at two sides of the first end away from each other, the second end is provided with two first connecting portions, the two first connecting portions are disposed at two sides of the second end away from each other, and the side wall is provided with two second clamping portions corresponding to the two first clamping portions and two second connecting portions corresponding to the two first connecting portions.