WO2023142306A1

WO2023142306A1 - Battery top cover, battery module and battery pack

Info

Publication number: WO2023142306A1
Application number: PCT/CN2022/092603
Authority: WO
Inventors: 励建炬
Original assignee: 深圳市科达利实业股份有限公司
Priority date: 2022-01-27
Filing date: 2022-05-13
Publication date: 2023-08-03
Also published as: FR3132164B3; HU5575U; CN216850109U; FR3132164A3; DE202022104169U1

Abstract

The present application belongs to the technical field of batteries. Disclosed is a battery top cover, which comprises a cover plate, a shell, a terminal and limiting pins, the cover plate, the shell and the terminal being sequentially connected. The cover plate is provided with first limiting recesses, the terminal is provided with second limiting recesses, and the first limiting recesses and the second limiting recesses are arranged to be in plug fit with the limiting pins. The limiting pins pass through the shell and are inserted into the first limiting recesses and the second limiting recesses.

Description

Battery top cover, battery module and battery pack

This application claims priority to a Chinese patent application with application number 202220244514.1 filed with the China Patent Office on January 27, 2022, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the technical field of batteries, for example, to a battery top cover, a battery module and a battery pack.

Background technique

The battery top cover is one of the components of the battery module. It is generally composed of a cover plate, a plastic casing and terminals. The poles of the battery pass through the cover plate, plastic casing and terminals in turn.

Since the plastic shell and terminals are easy to rotate relative to the cover plate, it is necessary to restrict the rotation of the plastic shell and terminals relative to the cover plate. The battery top cover in the related art generally has a first groove on the cover plate, and the plastic shell has an upper end surface. and the lower end surface, wherein the lower end surface is protruded with a first boss, and the first boss is plugged into the first groove, thereby restricting the rotation of the plastic shell relative to the cover plate, but there is a problem that it is impossible to restrict the terminal relative to the plastic The rotation of the shell; and because the hardness of the plastic material is low, when the plastic shell is subjected to a large torque, the anti-rotation effect is not good.

In view of the above problems, the related art provides a cell top cover. On the basis of the related art, a second boss is protruded on the upper end surface of the plastic shell, and a second groove is provided on the terminal. The second boss Inserted into the second groove, thereby restricting the rotation of the terminal relative to the plastic shell. But the same problem is that the hardness of the plastic material is low. In addition, since the first boss, the second boss and the plastic shell need to be integrally processed by injection molding, etc., when it is necessary to improve the structural strength of the first boss and the second boss, it is necessary to integrate the entire plastic shell, the first Both the boss and the second boss are integrally manufactured by materials with relatively high hardness, resulting in waste of materials, difficult processing and replacement, and high cost.

Therefore, there is an urgent need for a battery top cover, a battery module and a battery pack to solve the above problems.

Contents of the invention

According to one aspect of the present application, the present application provides a battery top cover, which can limit the rotation of the shell and the terminals relative to the cover plate. At the same time, the assembly process is simple and easy to replace. Different limits can be selected according to the torque on the shell and the terminals. bit pin.

This application adopts the following technical solutions:

A battery top cover, comprising:

The cover plate has a first limiting groove;

shell;

The terminal has a second limiting groove, and the cover plate and the terminal are respectively connected to both sides of the housing;

The limiting pin passes through the housing and is inserted into the first limiting groove and the second limiting groove at the same time.

Description of drawings

Fig. 1 is a schematic diagram of the explosion structure of the battery top cover in the embodiment of the present application;

Fig. 2 is a schematic diagram of an assembly structure of the battery top cover in the embodiment of the present application;

Fig. 3 is a schematic diagram of another assembly structure of the battery top cover in the embodiment of the present application;

Fig. 4 is a schematic diagram of another assembly structure of the battery top cover in the embodiment of the present application;

FIG. 5 is a schematic structural diagram of a battery module in an embodiment of the present application.

In the picture:

1. Cover plate; 11. The first limiting groove; 12. The first receiving groove;

2. Shell; 21. The second storage tank;

3. Terminal; 31. The second limiting groove; 32. The fourth limiting groove;

4. Limit pin;

5. Limiting boss; 51. Limiting hole;

101, the first installation hole; 102, the second installation hole; 103, the third installation hole.

Detailed ways

The application will be described in detail below in conjunction with the accompanying drawings and embodiments.

In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

In this application, unless otherwise expressly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this embodiment, the terms "up", "down", "left", "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operations. It is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed, or operate in a particular orientation, and thus should not be construed as limiting the application. In addition, the terms "first" and "second" are only used to distinguish in description, and have no special meaning.

The battery top cover is generally composed of a cover plate, a plastic case and a terminal. In the related art, the method of restricting the rotation of the plastic case and the terminal relative to the cover plate is to protrude a first boss on the lower end surface of the plastic case, and the first boss is plugged into the The first groove opened on the cover plate, or on this basis, a second boss is protruded on the upper surface of the shell, and the second boss is plugged into the second groove opened on the terminal, thereby limiting the plastic shell relative For the rotation of the cover plate and the terminal relative to the plastic housing. However, there is a problem that the hardness of the plastic material is low, and the anti-rotation effect is not good when the plastic shell is subjected to a large torque. However, if a material with higher hardness is used, the first boss, the second boss and the plastic shell need to be integrally processed by injection molding, etc., resulting in waste of materials, difficult processing and replacement, and high cost.

In view of the above problems, this embodiment provides a battery top cover, which can limit the rotation of the shell and the terminals relative to the cover plate, and at the same time, the assembly process is simple and easy to replace. Different limit pins can be selected according to the torque on the shell and the terminals. , can be used in the field of battery technology.

FIG. 1 shows a schematic diagram of an exploded structure of a battery top cover in an embodiment of the present application. Referring to FIG. 1 , the battery top cover includes a cover plate 1, a casing 2 and a terminal 3, and the cover plate 1, the casing 2 and the terminal 3 are connected in sequence, wherein the cover plate 1 and the terminal 3 are respectively connected to both sides of the casing 2, for example, The cover plate 1 , the case 2 and the terminal 3 are sequentially abutted against each other. The housing 2 is made of insulating material, which may be plastic material, such as polyphenylene sulfide (PPS) plastic material, which has good electrical insulation. The cover plate 1 has a first installation hole 101, the housing 2 has a second installation hole 102, the terminal 3 has a third installation hole 103, and the pole passes through the first installation hole 101, the second installation hole 102 and the third installation hole 103 in sequence . The platform 13 is a part of the cover plate 1. The platform 13 can be convex, flat or concave. In the embodiment of the present application, the platform 13 is concave to ensure the strength without reducing the thickness of the terminal 3. In the case of , reduce the height from the upper surface of the terminal 3 to the upper surface of the cover plate 1 to meet the size requirements.

FIG. 2 shows a schematic diagram of an assembly structure of a battery top cover in an embodiment of the present application. Referring to Fig. 2, the battery top cover also includes a limit pin 4, the cover plate 1 has a first limit groove 11, the terminal 3 has a second limit groove 31, the limit pin 4 passes through the casing 2 and is inserted into the first limit groove at the same time. The limiting groove 11 and the second limiting groove 31 . Therefore, the limit pin 4 can limit the rotation of the housing 2 relative to the cover plate 1 and the terminal 3 relative to the housing 2 , and the assembly process is simple. At the same time, because the limit pin 4 is processed and formed separately, the limit pin 4 can be made of materials with different hardnesses according to the torque on the shell 2 and the terminal 3. Compared with the related one-piece battery top cover, only Separately processing the limit pins 4 with different hardnesses can greatly increase the torsional force of carrying torsion.

Since the maximum torque of the cover plate 1, the shell 2 and the terminal 3 is located at the connection position with the limit pin 4, in order to make the joint withstand a large torque, the hardness of the material of the limit pin 4 is greater than that of the shell 2, which is used to withstand torque. Optionally, the material hardness of the limiting pin 4 is also greater than the material hardness of the cover plate 1 and the terminal 3, so as to improve the connection strength. The material of the above-mentioned limiting pin 4 can be selected as ceramic material, which has the advantages of high hardness, high insulation resistivity, small dielectric constant, and oxidation resistance.

Referring to FIG. 2 , since poles are generally required to be provided on the top cover of the battery, the poles pass through the first mounting hole 101, the second mounting hole 102 and the third mounting hole 103 in turn and are connected to the cover plate 1, the casing 2 and the terminal 3 respectively. , the shell 2 and the terminal 3 can be prevented from rotating relative to the cover plate 1 through the pole and a limit pin 4 . In order to enhance the anti-rotation effect of the limit pin 4, optionally, the limit pin 4 is provided with a plurality, and the first limit groove 11 and the second limit groove 31 also have a plurality respectively, and the number and limit The number of pin 4 is the same. The plurality of limiting pins 4 respectively pass through different positions of the housing 2 and are respectively inserted into the plurality of first limiting slots 11 , and are respectively inserted into the plurality of second limiting slots 31 . Exemplarily, the plurality of limit pins 4 are symmetrically distributed with respect to the center of the first mounting hole 101 , the second mounting hole 102 or the third mounting hole 103 , so that the housing 2 or the terminal 3 is evenly stressed when subjected to torque.

The shell 2 is inserted into the cover 1 and/or the terminal 3 to prevent the shell 2 from rotating relative to the cover 1 and/or the terminal 3 relative to the shell 2 . Its structure is described below.

FIG. 3 is a schematic diagram of another assembly structure of the battery top cover in the embodiment of the present application. Referring to FIG. 3 , an exemplary structure thereof is that the housing 2 is protruded with a limiting boss 5 , and the limiting boss 5 is plugged into the third limiting groove opened on the cover plate 1 and/or the third limiting groove opened on the terminal 3 . The fourth limiting groove 32. In this embodiment, only the limiting boss 5 is inserted into the fourth limiting groove 32 as an example. In other embodiments, the limiting boss 5 can also be inserted into the third limiting groove, or Other structures, no longer enumerate. Exemplarily, the limiting protrusion 5 is disposed on the side of the shell 2 close to the terminal 3 and plugged into the fourth limiting groove 32 to limit the rotation between the terminal 3 and the shell 2 . Optionally, a plurality of limiting bosses 5 are provided, for example, a plurality of limiting bosses 5 are distributed symmetrically with respect to the center of the first installation hole 101, the second installation hole 102 or the third installation hole 103, and its effect and setting The effects of multiple limit pins 4 are similar and will not be repeated here.

Fig. 4 is a schematic diagram showing another assembly structure of the battery top cover in the embodiment of the present application. Referring to Fig. 1 and Fig. 4, another exemplary structure thereof is that the housing 2 is protruded with a limiting boss 5, and the limiting boss 5 is inserted into the first limiting groove 11 and/or the second limiting groove 31 , the limiting boss 5 has a limiting hole 51 , and the limiting pin 4 passes through the limiting hole 51 . In the following, the limiting boss 5 is inserted into the second limiting groove 31 as an example. In other embodiments, the limiting boss 5 can also be inserted into the first limiting groove 11, or other structures. enumerate. Because the maximum torque position of the battery top cover is the connection position between the limit pin 4 and the cover plate 1 and the connection position between the limit boss 5 and the terminal 3, by setting the limit pin 4 in the limit hole 51, not only The connection strength between the limiting pin 4 and the first limiting groove 11 can be increased, and the structural strength of the limiting boss 5 can also be improved. Optionally, the limit pin 4 is spaced apart from the bottom wall of the second limit groove 31, since the limit boss 5 is arranged on the side of the housing 2 close to the terminal 3 and inserted into the second limit groove 31, it can prevent The expansion of the limit pin 4 leads to structural damage of the terminal 3 .

Referring to FIGS. 1-4 , the cover plate 1 has a first accommodating groove 12 , and the housing 2 is plugged into the first accommodating groove 12 . Rotation between the shell 2 and the cover plate 1 can be limited by the plug-in fit between the shell 2 and the first receiving groove 12 .

Referring to FIGS. 1-4 , similar to the structure described above, the housing 2 has a second receiving groove 21 , and the terminal 3 is plugged into the second receiving groove 21 . The rotation of the terminal 3 relative to the housing 2 can be restricted by the plug-in fit between the terminal 3 and the second receiving groove 21 , and at the same time, the housing 2 can wrap the terminal 3 and protect the side wall of the terminal 3 .

Referring to Figures 1-4, optionally, the first limiting groove 11 and the second limiting groove 31 are cylindrical grooves, the limiting pin 4 is cylindrical, and/or the limiting hole 51 is a round hole, and the structure is simple , easy to assemble. In addition, it is also possible that the first limiting groove 11 is a square groove, and/or the second limiting groove 31 is a square groove. The limit pin 4 is square, and the rotation of the limit pin 4 or the limit boss 5 can be limited by the first limit groove 11 and/or the second limit groove 31, so as to improve the structural strength. Optionally, the limit hole 51 is a square hole, and the relative rotation of the limit pin 4 relative to the limit boss 5 can be limited by the insertion fit between the limit pin 4 and the limit hole 51 .

FIG. 5 shows a schematic structural diagram of a battery module in an embodiment of the present application. Referring to FIG. 5 , this embodiment also provides a battery module, including the above-mentioned battery top cover. Through the above-mentioned structure, the terminals 3 of the battery top cover of the battery module, the casing 2 and the cover plate 1 are less likely to be opposed to each other. The rotation makes the battery module not easy to be damaged during the installation process, and improves the stability of the connection.

This embodiment also provides a battery pack, including the above-mentioned battery module, and the number of the battery module may be at least one.

Claims

A battery top cover, comprising:

The cover plate (1) has a first limiting groove (11);

shell(2);

The terminal (3) has a second limiting groove (31), and the cover plate (1) and the terminal (3) are respectively connected to both sides of the housing (2);

The limiting pin (4) passes through the casing (2) and is inserted into the first limiting groove (11) and the second limiting groove (31) at the same time.
The battery top cover according to claim 1, wherein the casing (2) is inserted into at least one of the cover plate (1) and the terminal (3).
The battery top cover according to claim 2, wherein, the housing (2) is protruded with a limiting boss (5), and the limiting boss (5) is plugged into the cover plate (1) At least one of the third limiting slot and the fourth limiting slot (32) opened in the terminal (3).
The battery top cover according to claim 2, wherein the housing (2) is protruded with a limiting boss (5), and the limiting boss (5) is plugged into the first limiting groove (11 ) and at least one of the second limiting groove (31), the limiting boss (5) has a limiting hole (51), and the limiting pin (4) passes through the limiting hole (51).
The battery top cover according to claim 1, wherein the material hardness of the limiting pin (4) is greater than the material hardness of the casing (2).
The battery top cover according to any one of claims 1-5, wherein the cover plate (1) has a first accommodating groove (12), and the housing (2) is plugged into the first accommodating groove ( 12).
The battery top cover according to any one of claims 1-5, wherein, the housing (2) has a second receiving groove (21), and the terminal (3) is plugged into the second receiving groove (21) ).
The battery top cover according to any one of claims 1-5, wherein, the first limiting groove (11) is a square groove, or the second limiting groove (31) is a square groove, or the The first limiting groove (11) is a square groove and the second limiting groove is a square groove.
A battery module, comprising the battery top cover according to any one of claims 1-8.
A battery pack, comprising the battery module according to claim 9.